USRE45212E1 - Event-based multichannel direct link - Google Patents
Event-based multichannel direct link Download PDFInfo
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- USRE45212E1 USRE45212E1 US13/351,588 US201213351588A USRE45212E US RE45212 E1 USRE45212 E1 US RE45212E1 US 201213351588 A US201213351588 A US 201213351588A US RE45212 E USRE45212 E US RE45212E
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
- H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention is also related to U.S. patent application Ser. No. 10/880,367 filed concurrently herewith and entitled “Direct Link Relay In a Wireless Network,” U.S. patent application Ser. No. 10/880,367 filed concurrently herewith and entitled “Link Margin Notification Using Return Frame,” U.S. patent application Ser. No. 10/880,325 filed concurrently herewith and entitled “Time-Scheduled Multichannel Direct Link,” all claiming benefit of U.S. Provisional Application No. 60/515,701 filed Oct. 31, 2003, the entireties of which are incorporated by reference herein.
- the present invention relates generally to wireless communications between wireless devices and more particularly to utilizing multiple wireless channels to communicate information.
- IEEE 802.11 a/b/c/e/g/i provide for wireless connectivity between wireless devices, such as, for example, between a wireless station and an access point connected to an infrastructure network.
- IEEE 802.11 the Institute of Electrical and Electronics Engineers 802.11 a/b/c/e/g/i
- IEEE 802.11 the Institute of Electrical and Electronics Engineers 802.11 a/b/c/e/g/i
- IEEE 802.11 the Institute of Electrical and Electronics Engineers 802.11 a/b/c/e/g/i
- the process of using the access point as an intermediary has a number of drawbacks.
- the communication of information is delayed by routing it through the access point.
- the wireless channel used by the wireless devices and access point to communicate information also referred to as the “base” channel
- access contention mechanisms often are implemented, which typically results in additional delay.
- the present invention mitigates or solves the above-identified limitations in known solutions, as well as other unspecified deficiencies in known solutions.
- a number of advantages associated with the present invention are readily evident to those skilled in the art, including economy of design and resources, transparent operation, cost savings, etc.
- the present invention is directed to a method of communicating information directly between the first and second wireless devices in a wireless network including an access point logically connected to at least a first wireless device and a second wireless device.
- a further aspect of this invention is a method, in a wireless network including an access point operably connected to at least a first wireless device and a second wireless device, of providing information between the access point and at least one of the first and second wireless devices via a first channel for at least a portion of a first period, providing a channel change request from the first wireless device to the second wireless device on the first channel, providing an affirmative response to the channel change request from the second wireless device to the first wireless device on the first channel, switching the second wireless device to a second channel subsequent to the receipt of the acknowledgement to the provision of the affirmative response to the channel change request, switching the first wireless device to the second channel subsequent to the transmission of the acknowledgement to the receipt of the affirmative response to the channel change request; and communicating information directly between the first and second wireless devices via the second channel for at least a portion of a second period.
- a further aspect of this invention is a wireless device, in a wireless network having an access point, including a transceiver, and a direct link module operably connected to the transceiver and adapted to facilitate an establishment of a wireless direct link between the wireless device and another wireless device via a second channel, communicate information with the other wireless device via the wireless direct link for at least a portion of a first period, switch the transceiver from the first channel to a second channel in anticipation of a predetermined event; and communicate information with the access point via second channel for at least a portion of a second period.
- a further aspect of this invention is a wireless system including an access point and at least a first wireless device and a second wireless device.
- the first wireless device and a second wireless device are adapted to communicate information via a wireless direct link on a first channel during at least a portion of a first period, switch to a second channel in anticipation of a predetermined event; and communicate information with the access point on the second channel during at least a portion of a second period.
- FIG. 1 is a schematic diagram illustrating an exemplary wireless system having multiple channels for communicating information between wireless devices is illustrated in accordance with at least one embodiment of the present invention.
- FIG. 2 is a chart illustrating an exemplary event-based channel switch process for the wireless devices of FIG. 1 in accordance with at least one embodiment of the present invention.
- FIG. 3 is a schematic diagram illustrating an exemplary wireless device in greater detail in accordance with at least one embodiment of the present invention.
- FIG. 4 is a flow diagram illustrating an exemplary method for establishing a wireless direct link on a parallel channel in accordance with at least one embodiment of the present invention.
- FIG. 5 is a flow diagram illustrating an exemplary event-based channel switch process in accordance with at least one embodiment of the present invention.
- the system 100 incorporates a general wireless network topology described in IEEE 802.11 and other wireless standards wherein a plurality of wireless devices 102 , 104 are associated with at least one access point 106 .
- the wireless devices 102 , 104 include devices enabled to communicate wirelessly using one or more protocols.
- Such protocols may include, for example, the IEEE 802.11 protocols (802.11a/b/e/g/i), ANSI, Hyperlan, etc.
- wireless devices may include notebook (or “laptop”) computers, handheld computers, desktop computers, workstations, servers, portable digital assistants (PDAs), cellular phones, audio/visual (A/V) consoles, gaming consoles, televisions or other displays, etc.
- the system 100 may include, for example, a multimedia system having one or more displays, audio/video components (e.g., a digital video disc (DVD) player or a compact disc (CD) player), sound systems, video game consoles, and the like, where each of these components may be wirelessly connected to a central console acting in the capacity of the access point 106 .
- DVD digital video disc
- CD compact disc
- the access point 106 may be connected to an infrastructure network 108 or other network, such as, for example, the Internet, a local area network (LAN), a wide area network (WAN), and the like.
- wireless devices 102 , 104 may communicate with one or more networked devices on an infrastructure network via the access point 106 .
- the wireless devices 102 , 104 may communicate with each other via conventional wireless links 112 , 114 with the access point 106 or, as discussed in greater detail below, via a wireless direct link 110 between the wireless devices 102 , 104 and optionally other wireless devices. Exemplary techniques for establishing and maintaining a wireless direct link are described below and in U.S. patent application Ser. No. 60/515,701, and U.S. patent application Ser. No. 60/388,569 the entirety of which is incorporated by reference herein.
- information is communicated between wireless devices via an access point.
- a transmitting wireless device transmits the information to the access point on a base channel.
- the access point then processes the information, such as by changing the headers of one or more frames representing the information, and forwards the information to the receiving wireless device on the base channel.
- This use of the access point as the intermediary results in a delay in the overall transmission time for the information, as well as crowds the base channel because two transmissions take place, rather than one.
- these transmissions may have been further delayed due to congestion on the base channel by other transmitting devices.
- the distances to the access point may be much larger than the distance between the communicating devices, which allows the communicating devices to use much higher data rates on direct communications.
- the present invention provides techniques for enabling wireless devices to communicate information directly without use of the access point, while still permitting the transfer of information from the access point to the wireless devices, and vice versa.
- conventional wireless links 112 , 114 between the access point 106 and the wireless devices 102 , 104 may be used to initiate, establish and maintain a wireless direct link 110 between the wireless devices 102 , 104 .
- the wireless direct link 110 preferably is shifted to a parallel wireless channel (i.e., separate from the base channel) so that the transmission of information via the direct link 110 is not significantly impaired by traffic on the base channel, and vice versa.
- the wireless devices 102 , 104 may be configured to switch back to the base channel or other wireless channel to receive buffered downlink information or peer-to-peer information from the access point 106 or to transmit uplink information or peer-to-peer information to the access point 106 , for example.
- the switch between the parallel channel and the base channel may occur in anticipation of a predetermined event, such as the periodic transmission of a delivery traffic indication map (DTIM) beacon frame by the access point 106 , or the switch from the parallel channel to the base channel, or vice versa, may be initiated by either of the wireless devices 102 , 104 .
- DTIM delivery traffic indication map
- a chart 200 depicting an exemplary event-based channel switching process is illustrated in accordance with at least one embodiment of the present invention.
- the ordinate 202 of the chart 200 represents time, whereas the abscissa 204 represents at least a portion of the frequency bandwidth in which the system 100 operates.
- base channel 206 represents the wireless channel used by the access point 106 to communicate with the wireless devices 102 , 104 , and vice versa.
- Parallel channel 208 represents a channel used by wireless devices 102 , 104 , to shift wireless direct link 110 to.
- transmission period 210 may represent a direct link handshake period conducted on the base channel 206 to initiate and establish the direct link 110 on the parallel channel 208 for direct transmission of information between the wireless devices.
- An exemplary process for initiating and establishing a direct link 110 on a parallel channel is described in greater detail below with reference to FIG. 4 .
- the direct link 110 may be established on parallel channel 208 for any of a variety of reasons, such as to reduce bandwidth congestion by using multiple channels to transmit information or to reduce latency in the transmission of information between the wireless devices 102 , 104 .
- the wireless devices 102 , 104 switch to parallel channel 208 at or around time t 1 .
- the subsequent transmission period 212 may represent a time period wherein information may be communicated between the wireless devices 102 , 104 via the direct link 110 on parallel channel 208 .
- the wireless devices 102 and 104 transmit a frame to the access point with the PM bit set, to indicate to the access point that they cannot be reached.
- the nodes are on the parallel channel and are most likely not in power save, but there is no difference from the viewpoint of the access point because the wireless nodes cannot be reached in either case.
- the access point will buffer traffic for these nodes in separate power save queues, for later delivery.
- the wireless devices 102 , 104 may directly communicate information via the direct link 110 on parallel channel 208 , the wireless devices 102 , 104 may need to return to the base channel 206 or another channel on a periodic basis in order to receive information from the access point 106 or other wireless device and/or to provide uplink information to the access point 106 or peer wireless devices.
- the wireless devices 102 , 104 may be unable to receive information from the access point 106 while their transceivers are tuned to the parallel channel 208 during transmission period 212 .
- the access point 106 may buffer information intended for the wireless devices 102 , 104 during the transmission period 212 .
- access points typically periodically transmit information that indicates that the access point has buffered information for one or more wireless devices associated with the access point.
- IEEE 802.11 provides for the periodic transmission of a delivery traffic indication map (DTIM) beacon frame every DTIM period or at a target beacon transmission time (TBTT).
- DTIM delivery traffic indication map
- TBTT target beacon transmission time
- wireless devices 102 , 104 switch back to the base channel 206 in anticipation of a predetermined event 220 (occurring, for example, at time t 2 ), where the predetermined event 220 may include, for example: the transmission of buffered information, broadcast and/or multicast information by the access point 106 on the base channel 206 ; the transmission of an indication of buffered information by the access point 106 , such as, for example, a DTIM beacon frame; and the like.
- the wireless devices 102 , 104 may use the indication of buffered information to determine whether they have information buffered at the access point 106 and then may request this information from the access point 106 using, for example, a Power Save (PS)-Poll frame.
- PS Power Save
- the transmission period 214 may represent the transmission of multicast, broadcast, and buffered unicast information from the access point 106 to the wireless devices 102 , 104 , the transmission of uplink information from the wireless devices 102 , 104 to the access point 106 , the transmission of peer-to-peer information between the wireless devices 102 , 104 and other wireless devices, and the like.
- the wireless devices 102 , 104 may switch back to parallel channel 208 and continue communicating information directly via the direct link 110 during transmission period 216 .
- the wireless devices 102 , 104 may initiate, establish and use a wireless direct link on a different channel
- the wireless devices 102 , 104 may switch back to the base channel 206 in anticipation of another predetermined event 222 , e.g., the transmission of another DTIM map, at or around time t 4 .
- information between the access point 106 , the wireless devices 102 , 104 and/or other wireless devices may be communicated as described above during transmission period 218 .
- the process of switching between channels to alternatively transmit information over a direct link on one channel and communicate with the access point 106 or other wireless device on another channel may continue for any number of cycles as appropriate.
- the direct link can always be used, irrespective of whether the wireless devices 102 and 104 reside on the parallel channel or on the base channel.
- wireless devices 102 , 104 illustrated as wireless device 302
- exemplary methods 400 and 500 of its operation are illustrated in accordance with at least one embodiment of the present invention. Although certain actions are attributed to either wireless device 102 or wireless device 104 for ease of reference, those skilled in the art will appreciate that some or all of these actions may be performed by either wireless device 102 or wireless device 104 .
- the wireless device 302 (representative of either wireless device 102 or 104 ) includes at least a transceiver 304 for transmitting and/or receiving signals representing information, one or more processors 306 and protocol stacks 308 for processing and otherwise preparing information for transmission via the transceiver 304 , as well as for processing information received via the transceiver 304 .
- the wireless device 302 further may include a multiple channel direct link (MCDL) module 310 for initiating, establishing, and maintaining a one or more wireless direct links on one or more channels, communicating information via the one or more wireless direct links, switching between channels as appropriate, and other various actions described in detail herein.
- MCDL multiple channel direct link
- the MCDL module 310 may be implemented as software, hardware, firmware, or a combination thereof. To illustrate, the MCDL module 310 may be implemented as a software component of the protocol stack 308 , as a separate software program or module executed by the processor 306 , or as a software or hardware component implemented as part of the transceiver 304 .
- one of the wireless devices 102 , 104 may transmit a setup request frame to the access point 106 on the base channel for forwarding to the wireless device 104 at step 402 , where the setup request frame represents an invitation or proposal to establish a direct link on another channel.
- the setup request frame may include a channel information element (CIE) (e.g., in the payload of the frame), where the CIE may include one or more indicators associated with a proposed channel, such as, for example, the center frequency and channel width of the proposed channel or a low frequency and a high frequency of the proposed channel.
- CIE channel information element
- the proposed channel may be selected at random, or, in one embodiment, the wireless device 102 may scan one or more potential channels for traffic and select a channel having relatively little or no traffic as the proposed channel.
- the setup request may be encapsulated inside a regular data frame, using LLC encapsulation. This method is described in more detail in U.S. patent application Ser. No. 60/515,701, which has been referenced before. Security credentials may also be included inside the setup frames. Due to the encapsulation in a regular data frame, any access point will forward the frame to the ultimate destination without processing the data portion, irrespective of whether the access point knows about this protocol or not. The LLC encapsulation effectively creates a transparent tunnel through the access point.
- the access point 106 may process the setup request frame as necessary and forward the setup request frame to the wireless device 104 at step 404 . Access points will usually forward this data frame without additional processing of the payload.
- the wireless device 104 may consider the proposal to establish a direct link on the proposed channel. If acceptable, the wireless device 104 may transmit an affirmative setup response frame to the access point 106 on the base channel for forwarding to the wireless device 102 at step 406 . If the proposal to establish a direct link is acceptable but the proposed channel is not (because, for example, the wireless device 104 cannot operate at the proposed frequency), the wireless device 104 may transmit a conditional setup response frame to the access point 106 on the base channel for forwarding to the wireless device 102 .
- the conditional setup response frame may include a proposal for an alternate channel for consideration by the wireless device 102 .
- the wireless device 104 may transmit a negative setup response frame to the wireless device 102 indicating that the wireless device 104 has declined to participate in a direct link with the wireless device 102 .
- the wireless device 102 may attempt to set up a direct link 110 on the base channel or it may cease attempts to establish a direct link 110 with the wireless device 104 .
- the setup response frame includes an agreed/denied/conditional field that may be used to indicate whether the setup response is affirmative, negative or conditional. If the responding device does not support direct link, it may not recognize the multi channel capability (i.e. the CIE element), and it may respond with a response message that does not include a multi channel capability element (i.e. the CIE element). In this way, a direct link may still be set up, but possibly without the option of being shifted to another channel.
- the multi channel capability i.e. the CIE element
- the setup response frame may further include an indication that the wireless device 104 is entering a sleep mode or power-saving mode whereby the access point 106 is to buffer all information intended for the wireless device 104 until the access point 106 is polled for the buffered information.
- the power-saving mode indicator may include, for example, a power management (PM) bit set or cleared in the header of the setup response frame.
- the access point 106 Upon receipt of the setup response frame, the access point 106 preferably enacts the buffering mechanism if so directed by the power-saving mode indicator and forwards the setup response frame to the wireless device 102 at step 408 .
- the wireless device 102 may transmit a setup confirm frame to the access point 106 for forwarding at step 410 . If the response is conditional upon acceptance of the use of the channel proposed by the wireless device 104 , the wireless device 102 may determine whether this proposed channel is acceptable. If so, the wireless device 102 may transmit the setup confirm frame at step 410 . If the response is negative, the wireless device 102 preferably ceases any attempts to establish a direct link.
- the setup confirmation frame may include an indication (e.g., a set PM bit) that the wireless device 102 is entering a sleep mode or power-saving mode and information intended for the wireless device 102 should be buffered at the access point 106 .
- the access point 106 may activate the buffering mechanism and forward the setup confirm frame to the wireless device 104 on the base channel at step 412 .
- the wireless device 102 Upon transmitting the setup confirm frame at step 410 , in one embodiment, the wireless device 102 switches its transceiver 304 to the agreed-to channel and waits for the arrival of the wireless device 104 at step 414 . Likewise, the wireless device 104 switches its transceiver 304 to the proposed channel upon receipt of the setup confirm frame at step 416 . To announce its presence on the proposed channel, the wireless device 104 may transmit an announcement frame on the proposed channel directly to the wireless device 102 at step 418 . At this point, the direct link 110 may be considered to be established and the wireless devices 102 , 104 may initiate the communication of information on the parallel channel via the direct link 110 at step 420 .
- devices 102 and/or 104 do not set the PM bit on the direct link handshake frames, but separate frames with the PM bit set are transmitted instead. These frames may be Null frames or regular data frames. Shifting the direct link to another channel is postponed until after the transmission of these separate PM frames. Shifting the direct link may be accomplished by a permanent or temporary channel switch, which are discussed in detail below.
- the direct link handshake may still include a multi channel capability or a set of supported channels to which the direct link could be transferred.
- the wireless device 102 may use this waiting period to scan the parallel channel to listen for traffic on the parallel channel.
- the arrival of wireless device 104 may be announced by the transmission of a first frame, which opens the direct link on the new channel.
- the wireless device 102 may suspend or cancel the direct link by transmitting, for example, a slow resumption mode (SRM) frame or a fast resumption mode (FRM) frame, or the wireless device 104 may transmit a channel switch request to the wireless device 104 once the wireless device 104 has switched to the parallel channel, where the channel switch request represents a proposal to switch the direct link to another parallel channel. Permanent and temporary channel switch requests are discussed in detail below.
- SRM slow resumption mode
- FPM fast resumption mode
- peer-to-peer traffic through the access point is preferably is temporarily suspended to avoid any reordering of frames waiting at the access point 106 .
- the wireless devices 102 , 104 may use a power-saving mode indicator, such as, for example, the PM bit, to notify the access point 106 that the devices 102 , 104 are entering a power-save mode and therefore directing the access point 106 to buffer downlink data until it is requested from the wireless devices via, for example, power mode-poll (PM-Poll) frames as described by IEEE 802.11.
- PM-Poll power mode-poll
- the method 500 initiates at steps 502 A and 502 B wherein the wireless devices 102 , 104 switch from the parallel channel (established using method 400 of FIG. 4 , for example) to the base channel of the access point 106 in anticipation of, or in preparation for, a predetermined event.
- the predetermined event includes the transmission of a DTIM beacon frame at steps 504 A, 504 B.
- DTIM beacon frames typically are transmitted substantially periodically (i.e., every DTIM beacon interval) and include a bitmap that indicates which wireless devices have information buffered at the access point 106 .
- the wireless devices 102 , 104 may switch to the base channel to receive the DTIM beacon frames so that the wireless devices 102 , 104 may determine whether there is information waiting for them at the access point 106 .
- the wireless devices 102 , 104 preferably switch to the base channel slightly before the DTIM beacon is scheduled to be transmitted to help ensure that the wireless devices 102 , 104 are switched to the base channel in time to receive the DTIM beacon frame.
- the wireless devices 102 , 104 may remain on the base channel after receiving the DTIM beacon frame the transmission of broadcast and multicast information (steps 506 A and 506 B) typically follows the transmission of a DTIM beacon frame.
- the wireless devices 102 , 104 are configured to switch back to the parallel channel at steps 508 A and 508 B after receiving the DTIM beacon frame and any multicast/broadcast information. If one or both of the wireless devices 102 , 104 determine that they have buffered information at the access point 106 using the DTIM beacon frame, the wireless device (device 102 in this example) may transmit a permanent channel switch (PCS) request frame on the parallel channel with a request to switch back to the parallel channel to the other wireless device at step 510 .
- PCS permanent channel switch
- the PCS request frame represents a request to switch to a proposed channel and includes one or more indicators of the proposed channel, such as, for example, the center frequency and channel width or a low frequency and a high frequency for the proposed channel.
- the receiving wireless device sends an affirmative PCS response frame on the parallel channel at step 512 .
- the receiving wireless device may transmit a conditional PCS response frame having an alternate proposed channel or a negative PCS response frame if no alternate channel is acceptable. If conditional, the wireless devices 102 , 104 negotiate an channel acceptable to both wireless devices 102 , 104 or if negative, the wireless devices 102 , 104 may cease communicating on the parallel channel and return to the base channel.
- a parallel channel may have been agreed upon during the setup phase and the PCS request may not contain an explicit channel information element.
- the receipt of a PCS request simply indicates in that case that a switch to the other channel is requested, i.e. the parallel channel if transmitted on the base channel and the base cannel if transmitted on the parallel channel.
- the wireless devices 102 , 104 may stay on the base channel after the end of the broadcast and multicast transmissions, while returning to the parallel channel is signaled by an explicit PCS request.
- the PCS request and response frames preferably are transmitted as quality-of-service (QoS) frames having a piggyback contention-free-acknowledgement (CF-Ack) as this type of frame typically requires only a single transmission operation (TXOP).
- QoS quality-of-service
- CF-Ack piggyback contention-free-acknowledgement
- TXOP transmission operation
- suitable piggyback frames that may be implemented as PCS request and/or response frames are described in detail in U.S. patent application Ser. No. 10/880,367 filed concurrently herewith and entitled “Link Margin Notification Using Return Frame.”
- Other frame formats, such as conventional data frames, may be used without departing from the spirit or the scope of the present invention.
- the wireless devices 102 , 104 Upon agreeing to a proposed switch to the base channel, the wireless devices 102 , 104 make the channel switch at steps 514 A, 514 B. One or both of the wireless devices 102 , 104 then may request and receive buffered information from the access point 106 , provide uplink information to the access point 106 , and/or communicate information with peer wireless devices via the base channel.
- the wireless device 102 may use a reverse polling technique by transmitting a PS-Poll frame (e.g., a QoS+CF+Poll frame) to the access point 106 at step 516 , where the PS-Poll frame represents a request for buffered information and an indication (e.g., a clearing of the PM bit) that the wireless device 102 has exited the power-saving mode.
- a PS-Poll frame e.g., a QoS+CF+Poll frame
- the access point 106 may transmit buffered downlink information to the wireless device 102 at step 518 .
- the wireless device 102 may transmit another frame, such as a null frame, to the access point 106 at step 520 , where the frame includes an indicator that the wireless device 102 is entering the power-saving mode so that the access point 106 may buffer any downlink information intended for the wireless device 102 .
- Uplink information and peer-to-peer information may be transmitted from the wireless devices 102 , 104 in a similar manner.
- one of the wireless devices may transmit a PCS request frame on the base channel at step 522 , where the PCS request frame may include an indication of the proposed channel to which the wireless devices 102 , 104 are to switch.
- the wireless devices 102 , 104 switch to the same parallel channel as before.
- it may be appropriate to switch to another channel because, for example, the original parallel channel has become congested with traffic from other wireless devices or significant interference as appeared at one or more frequencies of the original parallel channel.
- the wireless device 104 may transmit an affirmative or conditional PCS response frame to the wireless device 102 on the base channel at step 524 .
- the wireless devices switch to the proposed parallel channel and recommence the communication of information between the wireless devices 102 , 104 via the direct link 110 on the parallel channel at step 528 .
- the wireless devices 102 , 104 may utilize a temporary channel switch (TCS) sequence to temporarily move the direct link 110 to another channel.
- TCS temporary channel switch
- the TCS sequence typically includes a TCS request frame that may include a CIE and a timing synchronization function (TSF) to indicate the time at which the direct link 110 is scheduled to return to the current channel.
- TCS sequence also may include a TCS response frame that includes an agreed/denied/conditional field similar to the field used for the PCS response frame. If the responding wireless device can not leave the current channel, for instance if it is not yet in a power-save mode with the access point 106 , it may set the denied field inside the TCS response frame. Otherwise, if the responding wireless device is ready to move to the proposed channel, it may set the agreed field inside the TCS response frame.
- the TCS sequence also may be used to temporarily move the direct link 110 to the base channel for the exchange of information with the access point 106 (e.g., buffered information) or with peer devices.
- the direct link 110 preferably remains active during this time, so that information can be exchanged via the direct link 110 on the base channel as well.
- Devices 102 and 104 should not leave the power save state with the access point during this temporary stay on the base channel (for instance, by transmitting a frame to the access point with the PM bit reset), because it can not be ensured that they will be able to re-enter the power save state prior to the scheduled departure to the parallel channel with TCS.
- multiple devices each may establish a direct link with a single device.
- the presence of multiple direct links raises the issue of selecting a common parallel channel for the multiple direct links.
- the wireless device acting as the “hub” for the multiple peer devices may identify a suitable parallel channel that the multiple direct links may use by, for example, proposing a parallel channel currently in use, by scanning one or more other parallel channels, or by picking a channel at random.
- Another issue raised by multiple direct links includes channel switching.
- a device having multiple direct links wants to perform a channel switch, it preferably transmits a PCS request frame to each of the other direct link peer devices before switching to the proposed channel.
- Yet another issue includes the implementation of power saving or the sleep mode.
- this issue may be addressed by assuming that the traffic pattern has a star topology, so that there is a central node that communicates with the peripheral nodes, but the peripheral nodes do not communicate with each other.
- the central node may be treated as a constantly awake node (CAN) that acts as a surrogate access point by buffering information for all of the peripheral nodes, while maintaining a client association with the real access point at the same time.
- the peripheral nodes find can find the central node through its beacon transmissions and may associate with it instead of with the access point.
- the peripheral nodes then may use reverse polling to retrieve buffered information, as described above.
- This solution is suited for applications like gaming and multimedia, where a single central node maintains connections with several remote nodes, like game controllers or actuators, respectively.
Abstract
Description
Claims (56)
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110082940A1 (en) * | 2009-10-02 | 2011-04-07 | Michael Peter Montemurro | Methods and apparatus to establish peer-to-peer communications |
US20160014669A1 (en) * | 2014-07-10 | 2016-01-14 | Qualcomm Incorporated | Default data path for nan aided connectivity |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5694546A (en) * | 1994-05-31 | 1997-12-02 | Reisman; Richard R. | System for automatic unattended electronic information transport between a server and a client by a vendor provided transport software with a manifest list |
US8032652B2 (en) | 2009-04-30 | 2011-10-04 | Aruba Networks, Inc. | Initiating peer-to-peer tunnels |
US9049045B2 (en) | 2009-04-24 | 2015-06-02 | Aruba Networks, Inc. | Peer-to-peer forwarding for packet-switched traffic |
US20110082939A1 (en) * | 2009-10-02 | 2011-04-07 | Michael Peter Montemurro | Methods and apparatus to proxy discovery and negotiations between network entities to establish peer-to-peer communications |
KR20170026658A (en) * | 2010-11-16 | 2017-03-08 | 인터디지탈 패튼 홀딩스, 인크 | Method and apparatus for wireless direct link operation |
US9992021B1 (en) | 2013-03-14 | 2018-06-05 | GoTenna, Inc. | System and method for private and point-to-point communication between computing devices |
Citations (126)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5371734A (en) | 1993-01-29 | 1994-12-06 | Digital Ocean, Inc. | Medium access control protocol for wireless network |
US5463659A (en) | 1994-07-05 | 1995-10-31 | At&T Ipm Corp. | Apparatus and method of configuring a cordless telephone for operating in a frequency hopping system |
US5465398A (en) | 1993-10-07 | 1995-11-07 | Metricom, Inc. | Automatic power level control of a packet communication link |
US5487069A (en) | 1992-11-27 | 1996-01-23 | Commonwealth Scientific And Industrial Research Organization | Wireless LAN |
US5537414A (en) | 1992-07-07 | 1996-07-16 | Hitachi, Ltd. | Method of wireless communication between base station and mobile station and multiple access communication system |
US5636220A (en) | 1994-03-01 | 1997-06-03 | Motorola, Inc. | Packet delivery method for use in a wireless local area network (LAN) |
US5752201A (en) | 1996-02-09 | 1998-05-12 | Nokia Mobile Phones Limited | Mobile terminal having power saving mode that monitors specified numbers of filler messages |
US5768531A (en) | 1995-03-27 | 1998-06-16 | Toshiba America Information Systems | Apparatus and method for using multiple communication paths in a wireless LAN |
US5812968A (en) | 1996-08-28 | 1998-09-22 | Ericsson, Inc. | Vocoder apparatus using the link margin |
US5822682A (en) | 1995-01-20 | 1998-10-13 | Nokia Telecommunications Oy | Communicating on a direct mode channel |
US5862142A (en) | 1994-06-22 | 1999-01-19 | Hitachi, Ltd. | Frequency hopping wireless communication system and communication equipment |
US5991287A (en) | 1996-12-30 | 1999-11-23 | Lucent Technologies, Inc. | System and method for providing seamless handover in a wireless computer network |
US5995849A (en) | 1997-11-26 | 1999-11-30 | Direct Wireless Communication Corp. | Direct wireless communication system and method of operation |
US5999127A (en) | 1998-10-06 | 1999-12-07 | The Aerospace Corporation | Satellite communications facilitated by synchronized nodal regressions of low earth orbits |
US6047178A (en) | 1997-12-19 | 2000-04-04 | Nortel Networks Corporation | Direct communication wireless radio system |
US6052557A (en) | 1995-01-12 | 2000-04-18 | Nokia Telecommunication Oy | Direct mode repeater in a mobile radio system |
US6084865A (en) | 1995-07-12 | 2000-07-04 | Ericsson Inc. | Dual mode satellite/cellular terminal |
US6119014A (en) | 1998-04-01 | 2000-09-12 | Ericsson Inc. | System and method for displaying short messages depending upon location, priority, and user-defined indicators |
US6192230B1 (en) | 1993-03-06 | 2001-02-20 | Lucent Technologies, Inc. | Wireless data communication system having power saving function |
US6208627B1 (en) | 1997-12-10 | 2001-03-27 | Xircom, Inc. | Signaling and protocol for communication system with wireless trunk |
US6222842B1 (en) | 1996-10-10 | 2001-04-24 | Hewlett-Packard Company | System providing for multiple virtual circuits between two network entities |
US6292672B1 (en) | 1998-10-29 | 2001-09-18 | Avaya Technology Corp. | Call pickup group controlled by wireless terminals |
US6301609B1 (en) | 1999-07-07 | 2001-10-09 | Lucent Technologies Inc. | Assignable associate priorities for user-definable instant messaging buddy groups |
US20010031626A1 (en) | 2000-01-28 | 2001-10-18 | Jan Lindskog | Power status for wireless communications |
US6339713B1 (en) | 1998-08-11 | 2002-01-15 | Telefonaktiebolaget Lm Ericsson | Decreasing battery consumption of mobile terminals by decreasing monitoring of the multiple access channel downlinks |
US6343083B1 (en) | 1998-04-09 | 2002-01-29 | Alcatel Usa Sourcing, L.P. | Method and apparatus for supporting a connectionless communication protocol over an ATM network |
US6347095B1 (en) | 1999-11-15 | 2002-02-12 | Pango Networks, Inc. | System, devices and methods for use in proximity-based networking |
US20020025839A1 (en) | 2000-04-17 | 2002-02-28 | Hisayoshi Usui | Mobile communication device capable of carrying out both indirect and direct communication |
US6360277B1 (en) | 1998-07-22 | 2002-03-19 | Crydom Corporation | Addressable intelligent relay |
WO2002049387A1 (en) | 2000-12-11 | 2002-06-20 | Sharp Kabushiki Kaisha | Radio communication system |
US6415146B1 (en) | 1999-05-25 | 2002-07-02 | Lucent Technologies Inc. | Wireless system enabling mobile-to-mobile communication |
US20020087724A1 (en) | 2000-12-29 | 2002-07-04 | Ragula Systems D/B/A Fatpipe Networks | Combining connections for parallel access to multiple frame relay and other private networks |
US6424820B1 (en) | 1999-04-02 | 2002-07-23 | Interval Research Corporation | Inductively coupled wireless system and method |
US6430604B1 (en) | 1999-08-03 | 2002-08-06 | International Business Machines Corporation | Technique for enabling messaging systems to use alternative message delivery mechanisms |
US6463290B1 (en) | 1999-01-08 | 2002-10-08 | Trueposition, Inc. | Mobile-assisted network based techniques for improving accuracy of wireless location system |
US6470058B1 (en) | 2001-06-11 | 2002-10-22 | Xm Satellite Radio | System for and method of jointly optimizing the transmit antenna patterns of two geostationary satellites in a satellite broadcasting system |
US20020159544A1 (en) | 2001-02-28 | 2002-10-31 | Jeyhan Karaoguz | Multi-mode quadrature amplitude modulation receiver for high rate wireless personal area networks |
US20020168040A1 (en) | 2001-05-14 | 2002-11-14 | Coffey John T. | Sequential decoding with backtracking and adaptive equalization to combat narrowband interference |
US20020168993A1 (en) | 2001-05-10 | 2002-11-14 | Koninklijke Philips Electronics N.V. | Updating path loss estimation for power control and link adaptation in IEEE 802.11h WLAN |
US6484027B1 (en) | 1998-06-15 | 2002-11-19 | Sbc Technology Resources, Inc. | Enhanced wireless handset, including direct handset-to-handset communication mode |
US20020172186A1 (en) | 2001-04-09 | 2002-11-21 | Peter Larsson | Instantaneous joint transmit power control and link adaptation for RTS/CTS based channel access |
US6487180B1 (en) | 1996-10-15 | 2002-11-26 | Motorola, Inc. | Personal information system using proximity-based short-range wireless links |
EP1168676A4 (en) | 2000-02-17 | 2002-11-27 | Matsushita Electric Ind Co Ltd | Mobile communication system and mobile communication method |
US6496694B1 (en) | 2000-01-13 | 2002-12-17 | Intel Corporation | Wireless local loop with intelligent base station |
US20020191573A1 (en) | 2001-06-14 | 2002-12-19 | Whitehill Eric A. | Embedded routing algorithms under the internet protocol routing layer of a software architecture protocol stack in a mobile Ad-Hoc network |
US6507739B1 (en) | 2000-06-26 | 2003-01-14 | Motorola, Inc. | Apparatus and methods for controlling a cellular communications network having airborne transceivers |
US20030010524A1 (en) | 2001-07-10 | 2003-01-16 | Connor Brian W. | Electrical compression connector |
US20030036354A1 (en) | 2001-08-15 | 2003-02-20 | Lee Wayne A. | Dual mode bluetooth/wireless device with power conservation features |
US6525690B2 (en) | 1995-09-08 | 2003-02-25 | Prolink, Inc. | Golf course yardage and information system with zone detection |
US6529748B1 (en) | 1999-09-30 | 2003-03-04 | Motorola, Inc. | Bilateral power management system |
US6539232B2 (en) | 2000-06-10 | 2003-03-25 | Telcontar | Method and system for connecting mobile users based on degree of separation |
US6542748B2 (en) | 2000-06-10 | 2003-04-01 | Telcontar | Method and system for automatically initiating a telecommunications connection based on distance |
US6542749B2 (en) | 2000-06-10 | 2003-04-01 | Telcontar | Method and system for connecting proximately located mobile users based on compatible attributes |
US6542750B2 (en) | 2000-06-10 | 2003-04-01 | Telcontar | Method and system for selectively connecting mobile users based on physical proximity |
US20030063589A1 (en) | 2001-09-28 | 2003-04-03 | Haines Robert E. | Locating and mapping wireless network devices via wireless gateways |
US20030096576A1 (en) | 2000-12-29 | 2003-05-22 | Theodoros Salonidis | Method and apparatus for connecting devices via an ad hoc wireless communication network |
US6574266B1 (en) | 1999-06-25 | 2003-06-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Base-station-assisted terminal-to-terminal connection setup |
US6580704B1 (en) | 1999-08-26 | 2003-06-17 | Nokia Corporation | Direct mode communication method between two mobile terminals in access point controlled wireless LAN systems |
US20030126213A1 (en) | 2002-01-02 | 2003-07-03 | International Business Machines Corporation | Establishing direct instant messaging communication between wireless devices |
US6594666B1 (en) | 2000-09-25 | 2003-07-15 | Oracle International Corp. | Location aware application development framework |
US20030140084A1 (en) | 1999-04-15 | 2003-07-24 | D'angelo Leo A. | System controlling use of a communication channel |
US20030142641A1 (en) | 2002-01-29 | 2003-07-31 | Arch Wireless Holdings, Inc. | Managing wireless network data |
DE10228342A1 (en) | 2002-06-25 | 2003-09-04 | Siemens Ag | Adjusting transmission power of mobile station in radio system involves adjusting transmission power depending on positional information relating to mobile station |
US6618005B2 (en) | 2001-06-29 | 2003-09-09 | Intel Corporation | Determining wireless device locations |
US6625456B1 (en) | 1999-09-10 | 2003-09-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile communication system enabling location associated messages |
US20030185241A1 (en) | 2002-04-01 | 2003-10-02 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US6631271B1 (en) | 2000-08-29 | 2003-10-07 | James D. Logan | Rules based methods and apparatus |
US20030198196A1 (en) | 2002-04-17 | 2003-10-23 | Microsoft Corporation | Reducing idle power consumption in a networked battery operated device |
US20030210658A1 (en) | 2002-05-08 | 2003-11-13 | Microsoft Corporation | Method and system for managing power consumption of a network interface module in a wireless computing device |
US20030220765A1 (en) | 2002-05-24 | 2003-11-27 | Overy Michael Robert | Method and apparatus for enhancing security in a wireless network using distance measurement techniques |
US6665520B2 (en) | 1997-10-03 | 2003-12-16 | Hewlett-Packard Development Company, L.C. | Power management method of and apparatus for use in a wireless local area network (LAN) |
US20030232598A1 (en) | 2002-06-13 | 2003-12-18 | Daniel Aljadeff | Method and apparatus for intrusion management in a wireless network using physical location determination |
US20040044723A1 (en) | 2002-08-27 | 2004-03-04 | Bell Cynthia S. | User interface to facilitate exchanging files among processor-based devices |
US20040056901A1 (en) | 2002-09-24 | 2004-03-25 | March Wendy A. | Method, apparatus and system for representing relationships using a buddy list |
US20040077920A1 (en) | 2002-10-18 | 2004-04-22 | James Snyder | Magnet orientation assembly |
US20040078598A1 (en) | 2002-05-04 | 2004-04-22 | Instant802 Networks Inc. | Key management and control of wireless network access points at a central server |
US20040095907A1 (en) | 2000-06-13 | 2004-05-20 | Agee Brian G. | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
US6744743B2 (en) | 2000-03-30 | 2004-06-01 | Qualcomm Incorporated | Method and apparatus for controlling transmissions of a communications system |
US20040125775A1 (en) | 2002-12-31 | 2004-07-01 | Rios Carlos A. | Multiprotocol WLAN access point devices |
US20040125776A1 (en) | 2002-12-26 | 2004-07-01 | Haugli Hans C. | Peer-to-peer wireless data communication system with progressive dynamic routing |
US20040127214A1 (en) | 2002-10-01 | 2004-07-01 | Interdigital Technology Corporation | Wireless communication method and system with controlled WTRU peer-to-peer communications |
US6759956B2 (en) | 1998-10-23 | 2004-07-06 | Royal Thoughts, L.L.C. | Bi-directional wireless detection system |
US6763240B1 (en) | 1996-11-20 | 2004-07-13 | Inmarsat Ltd. | High margin notification method and apparatus |
US20040147249A1 (en) | 2003-01-29 | 2004-07-29 | Wentink Maarten Menzo | Embedding class of service information in MAC control frames |
US6778515B2 (en) | 1994-09-06 | 2004-08-17 | Interdigital Technology Corporation | Receiving station for wireless telephone system with diversity transmission and method |
US6788688B2 (en) | 1998-04-14 | 2004-09-07 | Harold Herman Trebes, Jr. | System and method for providing peer-oriented control of telecommunications services |
US6791962B2 (en) | 2002-06-12 | 2004-09-14 | Globespan Virata, Inc. | Direct link protocol in wireless local area networks |
US6795701B1 (en) | 2002-05-31 | 2004-09-21 | Transat Technologies, Inc. | Adaptable radio link for wireless communication networks |
US20040184456A1 (en) | 2001-06-18 | 2004-09-23 | Carl Binding | Packet-oriented data communications between mobile and fixed data networks |
US6799056B2 (en) | 2001-01-31 | 2004-09-28 | Joseph Curley | Computer system including multi-channel wireless communication link to a remote station |
US20040192413A1 (en) | 2003-03-31 | 2004-09-30 | Frank Edward H. | Wireless user input device providing host link indication |
US20040203698A1 (en) | 2002-04-22 | 2004-10-14 | Intel Corporation | Pre-notification of potential connection loss in wireless local area network |
US6810246B1 (en) | 2000-10-23 | 2004-10-26 | Verizon Laboratories Inc. | Method and system for analyzing digital wireless network performance |
US20040236850A1 (en) | 2003-05-19 | 2004-11-25 | Microsoft Corporation, Redmond, Washington | Client proximity detection method and system |
US20040242154A1 (en) | 2002-05-27 | 2004-12-02 | Shinji Takeda | Mobile communication system, transmission station, reception station, relay station, communication path deciding method, and communication path deciding program |
US20040246934A1 (en) | 2003-02-27 | 2004-12-09 | Kim Sang-Hee | Wireless local area networks and methods for establishing direct link protocol (DLP) communications between stations of wireless local area networks |
US6842460B1 (en) | 2001-06-27 | 2005-01-11 | Nokia Corporation | Ad hoc network discovery menu |
US20050030976A1 (en) | 2002-06-12 | 2005-02-10 | Globespan Virata Incorporated | Link margin notification using return frame |
WO2004077920A3 (en) | 2003-03-07 | 2005-04-28 | Koninkl Philips Electronics Nv | Method and system for radio link establishment and maintenance with p2p communication in wireless communication |
WO2005046134A1 (en) | 2003-10-31 | 2005-05-19 | Conexant Inc. | Link margin notification using return frame |
US6904055B2 (en) | 2002-06-24 | 2005-06-07 | Nokia Corporation | Ad hoc networking of terminals aided by a cellular network |
US20050122927A1 (en) | 2003-01-29 | 2005-06-09 | Conexant, Inc. | Power management for wireless direct link |
US20050135305A1 (en) | 2002-06-12 | 2005-06-23 | Globespanvirata, Inc. | Automatic peer discovery |
US20050157674A1 (en) | 2003-10-31 | 2005-07-21 | Globespanvirata Incorporated | Time-scheduled multichannel direct link |
US6925286B1 (en) | 1999-06-23 | 2005-08-02 | Sony International (Europe) Gmbh | Transmit power control for network devices in a wireless network |
US6968179B1 (en) | 2000-07-27 | 2005-11-22 | Microsoft Corporation | Place specific buddy list services |
US20050265305A1 (en) | 2000-08-30 | 2005-12-01 | Nec Corporation | Radio network, relay node, core node, relay transmission method used in the same and program thereof |
US6985461B2 (en) | 2001-03-22 | 2006-01-10 | Symbol Technologies, Inc. | Software for installation and configuration management of network nodes |
US7068615B2 (en) | 2002-01-09 | 2006-06-27 | The Boeing Company | Adaptable forward link data rates in communications systems for mobile platforms |
US20060148406A1 (en) | 2001-12-04 | 2006-07-06 | Jay Strater | Dynamic upstream attenuation for ingress noise reduction |
US7095722B1 (en) | 1999-10-18 | 2006-08-22 | Koninklijke Philips Electronics N.V. | Method for the operation of wireless base stations for packet transfer radio systems having a guaranteed service quality |
US7133909B2 (en) | 2001-01-12 | 2006-11-07 | Microsoft Corporation | Systems and methods for locating mobile computer users in a wireless network |
WO2005067535A3 (en) | 2004-01-14 | 2007-03-08 | Conexant Systems Inc | Power management in wireless direct link |
US20070077894A1 (en) | 2003-03-12 | 2007-04-05 | Koninklijke Philips Electronics N.V. | Automatic gain control with two power detectors |
US7212827B1 (en) | 2000-11-09 | 2007-05-01 | Agere Systems Inc. | Intelligent reminders for wireless PDA devices |
US7233792B2 (en) | 2002-03-11 | 2007-06-19 | Ting-Mao Chang | Proximity triggered job scheduling system and method |
US7245592B2 (en) | 2001-07-09 | 2007-07-17 | Koninklijke Philips Electronics N.V. | Aligning 802.11e HCF and 802.11h TPC operations |
US7251235B2 (en) | 2002-06-12 | 2007-07-31 | Conexant, Inc. | Event-based multichannel direct link |
US7260392B2 (en) | 2002-09-25 | 2007-08-21 | Intel Corporation | Seamless teardown of direct link communication in a wireless LAN |
US7277692B1 (en) | 2002-07-10 | 2007-10-02 | Sprint Spectrum L.P. | System and method of collecting audio data for use in establishing surround sound recording |
US7308202B2 (en) | 2002-02-01 | 2007-12-11 | Cubic Corporation | Secure covert combat identification friend-or-foe (IFF) system for the dismounted soldier |
US7359727B2 (en) | 2003-12-16 | 2008-04-15 | Intel Corporation | Systems and methods for adjusting transmit power in wireless local area networks |
US20080095126A1 (en) | 1997-02-06 | 2008-04-24 | Mahany Ronald L | Low-Power Wireless Beaconing Network Supporting Proximal Formation, Separation and Reformation |
US7421466B2 (en) | 2001-10-29 | 2008-09-02 | Hewlett-Packard Development Company, L.P. | Dynamic mapping of wireless network devices |
US7450550B2 (en) | 2003-06-24 | 2008-11-11 | Samsung Electronics Co., Ltd. | Apparatus and method for enhancing transfer rate using a direct link protocol (DLP) and multiple channels in a wireless local area network (LAN) using a distributed coordination function (DCF) |
US7545771B2 (en) | 2003-01-29 | 2009-06-09 | Xocyst Transfer Ag L.L.C. | Independent direct link protocol |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8050360B2 (en) | 2002-06-12 | 2011-11-01 | Intellectual Ventures I Llc | Direct link relay in a wireless network |
JP2004040568A (en) | 2002-07-04 | 2004-02-05 | Denso Corp | Radio communications terminal |
-
2009
- 2009-07-27 US US12/460,974 patent/USRE43127E1/en not_active Expired - Lifetime
-
2012
- 2012-01-17 US US13/351,588 patent/USRE45212E1/en not_active Expired - Lifetime
Patent Citations (131)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5537414A (en) | 1992-07-07 | 1996-07-16 | Hitachi, Ltd. | Method of wireless communication between base station and mobile station and multiple access communication system |
US5487069A (en) | 1992-11-27 | 1996-01-23 | Commonwealth Scientific And Industrial Research Organization | Wireless LAN |
US5371734A (en) | 1993-01-29 | 1994-12-06 | Digital Ocean, Inc. | Medium access control protocol for wireless network |
US6192230B1 (en) | 1993-03-06 | 2001-02-20 | Lucent Technologies, Inc. | Wireless data communication system having power saving function |
US5465398A (en) | 1993-10-07 | 1995-11-07 | Metricom, Inc. | Automatic power level control of a packet communication link |
US5636220A (en) | 1994-03-01 | 1997-06-03 | Motorola, Inc. | Packet delivery method for use in a wireless local area network (LAN) |
US5862142A (en) | 1994-06-22 | 1999-01-19 | Hitachi, Ltd. | Frequency hopping wireless communication system and communication equipment |
US5463659A (en) | 1994-07-05 | 1995-10-31 | At&T Ipm Corp. | Apparatus and method of configuring a cordless telephone for operating in a frequency hopping system |
US6785251B2 (en) | 1994-09-06 | 2004-08-31 | Interdigital Technology Corporation | Receiving station for wireless telephone system with diversity transmission and method |
US6778515B2 (en) | 1994-09-06 | 2004-08-17 | Interdigital Technology Corporation | Receiving station for wireless telephone system with diversity transmission and method |
US6052557A (en) | 1995-01-12 | 2000-04-18 | Nokia Telecommunication Oy | Direct mode repeater in a mobile radio system |
US5822682A (en) | 1995-01-20 | 1998-10-13 | Nokia Telecommunications Oy | Communicating on a direct mode channel |
US5768531A (en) | 1995-03-27 | 1998-06-16 | Toshiba America Information Systems | Apparatus and method for using multiple communication paths in a wireless LAN |
US6084865A (en) | 1995-07-12 | 2000-07-04 | Ericsson Inc. | Dual mode satellite/cellular terminal |
US6525690B2 (en) | 1995-09-08 | 2003-02-25 | Prolink, Inc. | Golf course yardage and information system with zone detection |
US5752201A (en) | 1996-02-09 | 1998-05-12 | Nokia Mobile Phones Limited | Mobile terminal having power saving mode that monitors specified numbers of filler messages |
US5812968A (en) | 1996-08-28 | 1998-09-22 | Ericsson, Inc. | Vocoder apparatus using the link margin |
US6222842B1 (en) | 1996-10-10 | 2001-04-24 | Hewlett-Packard Company | System providing for multiple virtual circuits between two network entities |
US6487180B1 (en) | 1996-10-15 | 2002-11-26 | Motorola, Inc. | Personal information system using proximity-based short-range wireless links |
US6763240B1 (en) | 1996-11-20 | 2004-07-13 | Inmarsat Ltd. | High margin notification method and apparatus |
US5991287A (en) | 1996-12-30 | 1999-11-23 | Lucent Technologies, Inc. | System and method for providing seamless handover in a wireless computer network |
US20080095126A1 (en) | 1997-02-06 | 2008-04-24 | Mahany Ronald L | Low-Power Wireless Beaconing Network Supporting Proximal Formation, Separation and Reformation |
US6665520B2 (en) | 1997-10-03 | 2003-12-16 | Hewlett-Packard Development Company, L.C. | Power management method of and apparatus for use in a wireless local area network (LAN) |
US5995849A (en) | 1997-11-26 | 1999-11-30 | Direct Wireless Communication Corp. | Direct wireless communication system and method of operation |
US6208627B1 (en) | 1997-12-10 | 2001-03-27 | Xircom, Inc. | Signaling and protocol for communication system with wireless trunk |
US6047178A (en) | 1997-12-19 | 2000-04-04 | Nortel Networks Corporation | Direct communication wireless radio system |
US6119014A (en) | 1998-04-01 | 2000-09-12 | Ericsson Inc. | System and method for displaying short messages depending upon location, priority, and user-defined indicators |
US6343083B1 (en) | 1998-04-09 | 2002-01-29 | Alcatel Usa Sourcing, L.P. | Method and apparatus for supporting a connectionless communication protocol over an ATM network |
US6788688B2 (en) | 1998-04-14 | 2004-09-07 | Harold Herman Trebes, Jr. | System and method for providing peer-oriented control of telecommunications services |
US6484027B1 (en) | 1998-06-15 | 2002-11-19 | Sbc Technology Resources, Inc. | Enhanced wireless handset, including direct handset-to-handset communication mode |
US6360277B1 (en) | 1998-07-22 | 2002-03-19 | Crydom Corporation | Addressable intelligent relay |
US6339713B1 (en) | 1998-08-11 | 2002-01-15 | Telefonaktiebolaget Lm Ericsson | Decreasing battery consumption of mobile terminals by decreasing monitoring of the multiple access channel downlinks |
US5999127A (en) | 1998-10-06 | 1999-12-07 | The Aerospace Corporation | Satellite communications facilitated by synchronized nodal regressions of low earth orbits |
US6759956B2 (en) | 1998-10-23 | 2004-07-06 | Royal Thoughts, L.L.C. | Bi-directional wireless detection system |
US6292672B1 (en) | 1998-10-29 | 2001-09-18 | Avaya Technology Corp. | Call pickup group controlled by wireless terminals |
US6463290B1 (en) | 1999-01-08 | 2002-10-08 | Trueposition, Inc. | Mobile-assisted network based techniques for improving accuracy of wireless location system |
US6424820B1 (en) | 1999-04-02 | 2002-07-23 | Interval Research Corporation | Inductively coupled wireless system and method |
US20030140084A1 (en) | 1999-04-15 | 2003-07-24 | D'angelo Leo A. | System controlling use of a communication channel |
US6415146B1 (en) | 1999-05-25 | 2002-07-02 | Lucent Technologies Inc. | Wireless system enabling mobile-to-mobile communication |
US6925286B1 (en) | 1999-06-23 | 2005-08-02 | Sony International (Europe) Gmbh | Transmit power control for network devices in a wireless network |
US6574266B1 (en) | 1999-06-25 | 2003-06-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Base-station-assisted terminal-to-terminal connection setup |
US6301609B1 (en) | 1999-07-07 | 2001-10-09 | Lucent Technologies Inc. | Assignable associate priorities for user-definable instant messaging buddy groups |
US6430604B1 (en) | 1999-08-03 | 2002-08-06 | International Business Machines Corporation | Technique for enabling messaging systems to use alternative message delivery mechanisms |
US6580704B1 (en) | 1999-08-26 | 2003-06-17 | Nokia Corporation | Direct mode communication method between two mobile terminals in access point controlled wireless LAN systems |
US6625456B1 (en) | 1999-09-10 | 2003-09-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile communication system enabling location associated messages |
US6529748B1 (en) | 1999-09-30 | 2003-03-04 | Motorola, Inc. | Bilateral power management system |
US7095722B1 (en) | 1999-10-18 | 2006-08-22 | Koninklijke Philips Electronics N.V. | Method for the operation of wireless base stations for packet transfer radio systems having a guaranteed service quality |
US6347095B1 (en) | 1999-11-15 | 2002-02-12 | Pango Networks, Inc. | System, devices and methods for use in proximity-based networking |
US6496694B1 (en) | 2000-01-13 | 2002-12-17 | Intel Corporation | Wireless local loop with intelligent base station |
US20010031626A1 (en) | 2000-01-28 | 2001-10-18 | Jan Lindskog | Power status for wireless communications |
EP1168676A4 (en) | 2000-02-17 | 2002-11-27 | Matsushita Electric Ind Co Ltd | Mobile communication system and mobile communication method |
US6744743B2 (en) | 2000-03-30 | 2004-06-01 | Qualcomm Incorporated | Method and apparatus for controlling transmissions of a communications system |
US20020025839A1 (en) | 2000-04-17 | 2002-02-28 | Hisayoshi Usui | Mobile communication device capable of carrying out both indirect and direct communication |
US6542748B2 (en) | 2000-06-10 | 2003-04-01 | Telcontar | Method and system for automatically initiating a telecommunications connection based on distance |
US6542750B2 (en) | 2000-06-10 | 2003-04-01 | Telcontar | Method and system for selectively connecting mobile users based on physical proximity |
US6542749B2 (en) | 2000-06-10 | 2003-04-01 | Telcontar | Method and system for connecting proximately located mobile users based on compatible attributes |
US6539232B2 (en) | 2000-06-10 | 2003-03-25 | Telcontar | Method and system for connecting mobile users based on degree of separation |
US20040095907A1 (en) | 2000-06-13 | 2004-05-20 | Agee Brian G. | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
US6507739B1 (en) | 2000-06-26 | 2003-01-14 | Motorola, Inc. | Apparatus and methods for controlling a cellular communications network having airborne transceivers |
US6968179B1 (en) | 2000-07-27 | 2005-11-22 | Microsoft Corporation | Place specific buddy list services |
US6631271B1 (en) | 2000-08-29 | 2003-10-07 | James D. Logan | Rules based methods and apparatus |
US20050265305A1 (en) | 2000-08-30 | 2005-12-01 | Nec Corporation | Radio network, relay node, core node, relay transmission method used in the same and program thereof |
US6594666B1 (en) | 2000-09-25 | 2003-07-15 | Oracle International Corp. | Location aware application development framework |
US6810246B1 (en) | 2000-10-23 | 2004-10-26 | Verizon Laboratories Inc. | Method and system for analyzing digital wireless network performance |
US7212827B1 (en) | 2000-11-09 | 2007-05-01 | Agere Systems Inc. | Intelligent reminders for wireless PDA devices |
WO2002049387A1 (en) | 2000-12-11 | 2002-06-20 | Sharp Kabushiki Kaisha | Radio communication system |
US20040048609A1 (en) | 2000-12-11 | 2004-03-11 | Minoru Kosaka | Radio communication system |
US20020087724A1 (en) | 2000-12-29 | 2002-07-04 | Ragula Systems D/B/A Fatpipe Networks | Combining connections for parallel access to multiple frame relay and other private networks |
US20030096576A1 (en) | 2000-12-29 | 2003-05-22 | Theodoros Salonidis | Method and apparatus for connecting devices via an ad hoc wireless communication network |
US7133909B2 (en) | 2001-01-12 | 2006-11-07 | Microsoft Corporation | Systems and methods for locating mobile computer users in a wireless network |
US6799056B2 (en) | 2001-01-31 | 2004-09-28 | Joseph Curley | Computer system including multi-channel wireless communication link to a remote station |
US20020159544A1 (en) | 2001-02-28 | 2002-10-31 | Jeyhan Karaoguz | Multi-mode quadrature amplitude modulation receiver for high rate wireless personal area networks |
US6985461B2 (en) | 2001-03-22 | 2006-01-10 | Symbol Technologies, Inc. | Software for installation and configuration management of network nodes |
US20020172186A1 (en) | 2001-04-09 | 2002-11-21 | Peter Larsson | Instantaneous joint transmit power control and link adaptation for RTS/CTS based channel access |
US20020168993A1 (en) | 2001-05-10 | 2002-11-14 | Koninklijke Philips Electronics N.V. | Updating path loss estimation for power control and link adaptation in IEEE 802.11h WLAN |
US6978151B2 (en) | 2001-05-10 | 2005-12-20 | Koninklijke Philips Electronics N.V. | Updating path loss estimation for power control and link adaptation in IEEE 802.11h WLAN |
US20020168040A1 (en) | 2001-05-14 | 2002-11-14 | Coffey John T. | Sequential decoding with backtracking and adaptive equalization to combat narrowband interference |
US6470058B1 (en) | 2001-06-11 | 2002-10-22 | Xm Satellite Radio | System for and method of jointly optimizing the transmit antenna patterns of two geostationary satellites in a satellite broadcasting system |
US20020191573A1 (en) | 2001-06-14 | 2002-12-19 | Whitehill Eric A. | Embedded routing algorithms under the internet protocol routing layer of a software architecture protocol stack in a mobile Ad-Hoc network |
US20040184456A1 (en) | 2001-06-18 | 2004-09-23 | Carl Binding | Packet-oriented data communications between mobile and fixed data networks |
US6842460B1 (en) | 2001-06-27 | 2005-01-11 | Nokia Corporation | Ad hoc network discovery menu |
US6618005B2 (en) | 2001-06-29 | 2003-09-09 | Intel Corporation | Determining wireless device locations |
US7245592B2 (en) | 2001-07-09 | 2007-07-17 | Koninklijke Philips Electronics N.V. | Aligning 802.11e HCF and 802.11h TPC operations |
US20030010524A1 (en) | 2001-07-10 | 2003-01-16 | Connor Brian W. | Electrical compression connector |
US20030036354A1 (en) | 2001-08-15 | 2003-02-20 | Lee Wayne A. | Dual mode bluetooth/wireless device with power conservation features |
US6826162B2 (en) | 2001-09-28 | 2004-11-30 | Hewlett-Packard Development Company, L.P. | Locating and mapping wireless network devices via wireless gateways |
US20030063589A1 (en) | 2001-09-28 | 2003-04-03 | Haines Robert E. | Locating and mapping wireless network devices via wireless gateways |
US7421466B2 (en) | 2001-10-29 | 2008-09-02 | Hewlett-Packard Development Company, L.P. | Dynamic mapping of wireless network devices |
US20060148406A1 (en) | 2001-12-04 | 2006-07-06 | Jay Strater | Dynamic upstream attenuation for ingress noise reduction |
US20030126213A1 (en) | 2002-01-02 | 2003-07-03 | International Business Machines Corporation | Establishing direct instant messaging communication between wireless devices |
US7068615B2 (en) | 2002-01-09 | 2006-06-27 | The Boeing Company | Adaptable forward link data rates in communications systems for mobile platforms |
US7508799B2 (en) | 2002-01-29 | 2009-03-24 | Arch Wireless Operating Company, Inc. | Managing wireless network data |
US20030142641A1 (en) | 2002-01-29 | 2003-07-31 | Arch Wireless Holdings, Inc. | Managing wireless network data |
US7308202B2 (en) | 2002-02-01 | 2007-12-11 | Cubic Corporation | Secure covert combat identification friend-or-foe (IFF) system for the dismounted soldier |
US7233792B2 (en) | 2002-03-11 | 2007-06-19 | Ting-Mao Chang | Proximity triggered job scheduling system and method |
US20030185241A1 (en) | 2002-04-01 | 2003-10-02 | Texas Instruments Incorporated | Wireless network scheduling data frames including physical layer configuration |
US20030198196A1 (en) | 2002-04-17 | 2003-10-23 | Microsoft Corporation | Reducing idle power consumption in a networked battery operated device |
US20040203698A1 (en) | 2002-04-22 | 2004-10-14 | Intel Corporation | Pre-notification of potential connection loss in wireless local area network |
US20040078598A1 (en) | 2002-05-04 | 2004-04-22 | Instant802 Networks Inc. | Key management and control of wireless network access points at a central server |
US20030210658A1 (en) | 2002-05-08 | 2003-11-13 | Microsoft Corporation | Method and system for managing power consumption of a network interface module in a wireless computing device |
US20030220765A1 (en) | 2002-05-24 | 2003-11-27 | Overy Michael Robert | Method and apparatus for enhancing security in a wireless network using distance measurement techniques |
US20040242154A1 (en) | 2002-05-27 | 2004-12-02 | Shinji Takeda | Mobile communication system, transmission station, reception station, relay station, communication path deciding method, and communication path deciding program |
US6795701B1 (en) | 2002-05-31 | 2004-09-21 | Transat Technologies, Inc. | Adaptable radio link for wireless communication networks |
US6791962B2 (en) | 2002-06-12 | 2004-09-14 | Globespan Virata, Inc. | Direct link protocol in wireless local area networks |
US20050030976A1 (en) | 2002-06-12 | 2005-02-10 | Globespan Virata Incorporated | Link margin notification using return frame |
US20050135305A1 (en) | 2002-06-12 | 2005-06-23 | Globespanvirata, Inc. | Automatic peer discovery |
US7251235B2 (en) | 2002-06-12 | 2007-07-31 | Conexant, Inc. | Event-based multichannel direct link |
US20030232598A1 (en) | 2002-06-13 | 2003-12-18 | Daniel Aljadeff | Method and apparatus for intrusion management in a wireless network using physical location determination |
US6904055B2 (en) | 2002-06-24 | 2005-06-07 | Nokia Corporation | Ad hoc networking of terminals aided by a cellular network |
DE10228342A1 (en) | 2002-06-25 | 2003-09-04 | Siemens Ag | Adjusting transmission power of mobile station in radio system involves adjusting transmission power depending on positional information relating to mobile station |
US7277692B1 (en) | 2002-07-10 | 2007-10-02 | Sprint Spectrum L.P. | System and method of collecting audio data for use in establishing surround sound recording |
US20040044723A1 (en) | 2002-08-27 | 2004-03-04 | Bell Cynthia S. | User interface to facilitate exchanging files among processor-based devices |
US20040056901A1 (en) | 2002-09-24 | 2004-03-25 | March Wendy A. | Method, apparatus and system for representing relationships using a buddy list |
US7260392B2 (en) | 2002-09-25 | 2007-08-21 | Intel Corporation | Seamless teardown of direct link communication in a wireless LAN |
US20040127214A1 (en) | 2002-10-01 | 2004-07-01 | Interdigital Technology Corporation | Wireless communication method and system with controlled WTRU peer-to-peer communications |
US20040077920A1 (en) | 2002-10-18 | 2004-04-22 | James Snyder | Magnet orientation assembly |
US20040125776A1 (en) | 2002-12-26 | 2004-07-01 | Haugli Hans C. | Peer-to-peer wireless data communication system with progressive dynamic routing |
US20040125775A1 (en) | 2002-12-31 | 2004-07-01 | Rios Carlos A. | Multiprotocol WLAN access point devices |
US20040147249A1 (en) | 2003-01-29 | 2004-07-29 | Wentink Maarten Menzo | Embedding class of service information in MAC control frames |
US20050122927A1 (en) | 2003-01-29 | 2005-06-09 | Conexant, Inc. | Power management for wireless direct link |
US7545771B2 (en) | 2003-01-29 | 2009-06-09 | Xocyst Transfer Ag L.L.C. | Independent direct link protocol |
US20040246934A1 (en) | 2003-02-27 | 2004-12-09 | Kim Sang-Hee | Wireless local area networks and methods for establishing direct link protocol (DLP) communications between stations of wireless local area networks |
WO2004077920A3 (en) | 2003-03-07 | 2005-04-28 | Koninkl Philips Electronics Nv | Method and system for radio link establishment and maintenance with p2p communication in wireless communication |
US20070077894A1 (en) | 2003-03-12 | 2007-04-05 | Koninklijke Philips Electronics N.V. | Automatic gain control with two power detectors |
US20040192413A1 (en) | 2003-03-31 | 2004-09-30 | Frank Edward H. | Wireless user input device providing host link indication |
US20040236850A1 (en) | 2003-05-19 | 2004-11-25 | Microsoft Corporation, Redmond, Washington | Client proximity detection method and system |
US7450550B2 (en) | 2003-06-24 | 2008-11-11 | Samsung Electronics Co., Ltd. | Apparatus and method for enhancing transfer rate using a direct link protocol (DLP) and multiple channels in a wireless local area network (LAN) using a distributed coordination function (DCF) |
WO2005046134A1 (en) | 2003-10-31 | 2005-05-19 | Conexant Inc. | Link margin notification using return frame |
US20050157674A1 (en) | 2003-10-31 | 2005-07-21 | Globespanvirata Incorporated | Time-scheduled multichannel direct link |
US7359727B2 (en) | 2003-12-16 | 2008-04-15 | Intel Corporation | Systems and methods for adjusting transmit power in wireless local area networks |
WO2005067535A3 (en) | 2004-01-14 | 2007-03-08 | Conexant Systems Inc | Power management in wireless direct link |
Non-Patent Citations (56)
Title |
---|
802.11 Wireless Networks: The Definitive Guide. O'Reilly & Associates, 2002. pp. 1-14. |
A. Soomro and S. Choi Philips Research USA, Proposal to Add Link Margin Field in Ieee 802.11h Submission, Sep. 2001, Slides 9-14. |
ANSI/IEEE Std. 802.11, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification, pp. 1-513, 1999. |
Communication from the European Patent Office for EP Application 04794757.7, dated Jul. 28, 2009. |
Diepstraten et al., 802.11 Tutorial, IEEE, pp. 1-22, Mar. 1996. |
Donovan, Jeremy, "Location awareness beyond E911," EE Times, Jun. 9, 2003, 1 page. |
ESTRI TR 101 683 V1.1.1, Broadband Radio Access Networks; HIPERLAN Type 2; System Overview, pp. 1-19, 2000. |
European Search Report and Written Opinion for Application No. PCT/US2004/033487 dated Feb. 2, 2005, 14 pages. |
Final Office Action for U.S. Appl. No. 10/977,469, mailed Aug. 8, 2008. |
Final Office Action on U.S. Appl. No. 10/880,366, mailed Sep. 11, 2009. |
Final Office Action on U.S. Appl. No. 10/880,370, mailed Nov. 3, 2006. |
Final Office Action on U.S. Appl. No. 10/977,470, mailed Jul. 17, 2008. |
Final Office Action on U.S. Appl. No. 10/977,490, mailed Mar. 5, 2012. |
Final Office action on U.S. Appl. No. 12/460,974, mailed Jan. 27, 2011. |
Final Office Action on U.S. Appl. No. 13/271,394, mailed Nov. 5, 2012. |
Ho et al., MediaPlex-An IEEE 802.11 Enhanced Protocol for QoS-Driven Wireless LANS, IEEE pp. 1-25, Nov. 3, 2000. |
IEEE Standard 802.11h Amendment 5: Spectrum and transmit power management extensions in the 5 GHz band in Europe, published Oct. 14, 2003, IEEE, 75 pages. |
IEEE Std 801.11e/D3.0, Draft Supplemental to Standard for Telecommunications and Information Exchange Between Systems-LAN/MAN Specification, pp. 1-40, May 2002. * |
IEEE STD 802.11e/D3.0, Part 11: Wireless Access Control (MAC) and Physical Layer (PHY) Specifications: Medium Access Control (MAC) Enhancements for Quality of Service (QoS), IEEE, 140 pages, 2002. |
International Preliminary Report on patentability for PCT/US2004/033487, issued May 1, 2006. |
International Preliminary Report on patentability for PCT/US2005/001303, issued Nov. 29, 2006. |
International Search Report for PCT/US2004/033487, mailed Feb. 2, 2005. |
Kammerman et al, WaveLan-II: A High-Performance Wireless LAN for the Unlicensed Band, Bell Labs Technical Journal, pp. 118-133, 1997. |
Kandala et al., "Suggested Changes to Normative Text of WARP," IEEE, pp. 1-11, Jun. 2002. |
Kitchen, Duncan, "Wireless Address Resolution Protocol," IEEE 802.11-02/016r0, Jan. 14, 2002, pp. 1-13. |
Kitchen, Wireless Address Resolution Protocol, IEEE, pp. 1-13, Jan. 2000. * |
Ni et al., QoS Issues and Enhancements for IEEE 802.11 Wireless LAN, INRIA, pp. 1-34, Nov. 2002. |
Non-Final Office Action for U.S. Appl. No. 10/880,366, mailed Jan. 12, 2010. |
Non-Final Office Action for U.S. Appl. No. 10/977,470, mailed Feb. 26, 2009. |
Non-Final Office Action for U.S. Appl. No. 10/977,470, mailed Jan. 14, 2008. |
Non-Final Office Action on U.S. Appl. No. 10/880,366, mailed Feb. 20, 2009. |
Non-final Office Action on U.S. Appl. No. 10/880,367, mailed Aug. 3, 2010. |
Non-final Office Action on U.S. Appl. No. 10/880,367, mailed Jan. 21, 2011. |
Non-Final Office Action on U.S. Appl. No. 10/880,367, mailed Sep. 14, 2009. |
Non-Final Office Action on U.S. Appl. No. 10/880,370, mailed Apr. 6, 2006. |
Non-Final Office Action on U.S. Appl. No. 10/977,469, mailed Jan. 9, 2008. |
Non-Final Office Action on U.S. Appl. No. 10/977,490, mailed Mar. 5, 2014. |
Non-Final Office Action on U.S. Appl. No. 10/977,490, mailed Sep. 14, 2011. |
Non-Final Office Action on U.S. Appl. No. 12/460,974, mailed Mar. 24, 2010. |
Non-Final Office Action on U.S. Appl. No. 13/271,394, mailed Mar. 12, 2012. |
Notice of Allowance for U.S. Appl. No. 10/880,370, mailed Jun. 12, 2007. |
Notice of Allowance for U.S. Appl. No. 10/977,469, mailed Feb. 10, 2009. |
Notice of Allowance on U.S. Appl. 11/035,065, mailed Mar. 20, 2014. |
Notice of Allowance on U.S. Appl. No. 10/880,366, mailed May 28, 2010. |
Notice of Allowance on U.S. Appl. No. 10/880,366, mailed Nov. 26, 2010. |
Notice of Allowance on U.S. Appl. No. 10/880,367, mailed Jul. 21, 2011. |
Notice of Allowance on U.S. Appl. No. 10/977,470, mailed Jan. 6, 2011. |
Notice of Allowance on U.S. Appl. No. 11/035,065, mailed Oct. 1, 2013. |
Notice of Allowance on U.S. Appl. No. 12/460,974, mailed Sep. 21, 2011. |
Notice of Allowance on U.S. Appl. No. 13/271,394, mailed Jan. 22, 2013. |
Palm, Plam: Providing Fluid Connectivity in a Wireless World, 2002, 10 pages. |
PanGoNetworks, PanGo "Overview", Intelligent Wireless, Copyright 2003, 1 page. |
PanGoNetworks, PanGo "Proximity Platform," Intelligent Wireless, Copyright 2003, 2 pages. |
PanGoNetworks, PanGo Mobile Applications Suite, Intelligent Wireless, Copyright 2003, 2 pages. |
PanGoNetworks, PanGo Technology, How it Works, Intelligent Wireless, Copyright 2003, 1 page. |
Wentink, "Direct Stream Request Protocol (DSRP)," IEEE, pp. 1-16, Jul. 2002. |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110082940A1 (en) * | 2009-10-02 | 2011-04-07 | Michael Peter Montemurro | Methods and apparatus to establish peer-to-peer communications |
US9949305B2 (en) * | 2009-10-02 | 2018-04-17 | Blackberry Limited | Methods and apparatus for peer-to-peer communications in a wireless local area network |
US10681757B2 (en) | 2009-10-02 | 2020-06-09 | Blackberry Limited | Method and apparatus for peer-to-peer communications in a wireless local area network including the negotiation and establishment of a peer-to-peer connection between peers based on capability information |
US20160014669A1 (en) * | 2014-07-10 | 2016-01-14 | Qualcomm Incorporated | Default data path for nan aided connectivity |
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