US20140146808A1 - Power efficient tunneled direct link setup apparatus, systems and methods - Google Patents
Power efficient tunneled direct link setup apparatus, systems and methods Download PDFInfo
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- US20140146808A1 US20140146808A1 US14/171,993 US201414171993A US2014146808A1 US 20140146808 A1 US20140146808 A1 US 20140146808A1 US 201414171993 A US201414171993 A US 201414171993A US 2014146808 A1 US2014146808 A1 US 2014146808A1
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- H04W76/023—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
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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
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- H04W76/022—
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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
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor 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
- Embodiments described herein relate to apparatus, systems and methods associated with wireless communication technology, including structures and methods associated with wireless peer-to-peer and bridged-device communication.
- PMC Personal mobile communication
- Internet tablet computers are becoming increasingly ubiquitous.
- One factor driving the popularity of these devices is the rapid growth of so-called “social networking” applications and systems.
- Advances in social networking technology have enabled members of society to establish and maintain increasingly intimate social relationships across long distances via the Internet.
- PMC devices are designed to connect to the Internet wirelessly in order to support mobility.
- a PMC device may connect wirelessly via data links associated with a cell phone connection, a wide area networking connection such as an Institute of Electrical and Electronic Engineers (IEEE) 802.16 connection, and/or a local area networking connection such as an IEEE 802.11 connection, among others.
- IEEE Institute of Electrical and Electronic Engineers
- IEEE 802.11 standard may be found in ANSI/IEEE Std. 802.11, Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications (published 1999; reaffirmed June 2003). Additional information regarding the IEEE 802.16 protocol standard may be found in IEEE Standard for Local and Metropolitan Area Networks—Part 16: Air Interface for Fixed Broadband Wireless Access Systems (published Oct. 1, 2004).
- People at a party or other gathering may, for example, wish to transfer pictures between PMC devices.
- the 802.11 specification supports such a connection in ad hoc mode.
- configuring a PMC device to operate in 802.11 ad hoc mode is cumbersome, rendering this technique inappropriate for impromptu data sharing.
- Other methods may utilize 802.11 infrastructure mode.
- an 802.11 infrastructure network is not always available on an impromptu basis when needed.
- FIG. 1 is a block diagram of a system including two PMC devices capable of wireless peer-to-peer communication according to various example embodiments of the invention.
- FIG. 2 is a detailed block diagram of a PMC device within a system according to various example embodiments.
- FIG. 3 is a sequence diagram illustrating handshaking operations between a first wireless station incorporated into a first PMC device, a collocated emulated wireless AP, and a second wireless station incorporated into a second PMC device according to various example embodiments.
- FIG. 4 is a block diagram of a system including three PMC devices capable of bridged communication according to various example embodiments.
- FIG. 5 is a sequence diagram illustrating handshaking operations between a first wireless station incorporated into a first PMC device with a collocated emulated wireless AP module and two additional wireless stations incorporated into second and third PMC devices, respectively, according to various example embodiments.
- FIGS. 6A and 6B are flow charts illustrating a number of methods associated with various example embodiments.
- Embodiments and methods herein enable peer-to-peer and/or bridged communication between PMC devices operating as stations in a wireless network such as an 802.11 network.
- a wireless network such as an 802.11 network.
- At least one of the PMC devices incorporates an emulated wireless AP module.
- the wireless AP module communicates in infrastructure mode with other in-range PMC devices.
- the wireless AP module establishes a tunneled direct-link setup (TDLS) session between a station module collocated with the wireless AP module and a station module incorporated into a second PMC device.
- the emulated AP module may establish TDLS sessions between the collocated station module and station modules incorporated into two or more additional PMC devices. In that case, the collocated station module may bridge communication sessions between PMC devices that might otherwise be unable to decode each other's transmissions.
- the wireless AP module After establishing the TDLS session, the wireless AP module is allowed to sleep, waking up periodically to send infrastructure-mode beacon frames.
- the station modules incorporated into the two PMC devices communicate directly thereafter within the TDLS session.
- the station module collocated with the wireless AP module may also handle infrastructure management frames that would otherwise be handled by the wireless AP module.
- FIG. 1 is a block diagram of a system 100 including two PMC devices capable of wireless peer-to-peer communication according to various example embodiments of the invention.
- a first PMC device (PMC1) 110 includes a first station module (STA1) 115 .
- the STA1 115 is capable of entering into a TDLS session across a TDLS link 112 with a second station module (STA2) 120 located at a second PMC device (PMC2) 125 .
- the PMC1 110 also includes an emulated wireless AP module 130 communicatively coupled to the STA1 115 .
- the AP module 130 communicates with the STA2 120 in infrastructure mode to establish TDLS sessions between the STA1 115 and the STA2 120 .
- An infrastructure association between the wireless AP module 130 and the STA2 120 may be referred to hereinafter as a “TDLS setup link” (e.g., the TDLS setup link 140 ).
- the first PCM device 110 further includes an interprocess communication link 135 coupled to the STA1 115 and to the AP module 130 .
- the interprocess communication link 135 provides a path for passing messages between the STA1 115 and the AP module 130 .
- the STA1 115 and the AP module 130 communicate across the interprocess communication link 135 to establish TDLS sessions without passing over-the-air TDLS setup frames, as further described below.
- FIG. 2 is a detailed block diagram of a PMC device (e.g., the PMC1 110 of FIGS. 1 and 2 ) within a system (e.g., the system 100 of FIG. 1 ) according to various example embodiments.
- the PMC1 110 includes collocated station and emulated wireless AP modules (e.g., the STA1 115 and the AP module 130 , respectively, of FIGS. 1 and 2 ) and is capable of communicating with a second PMC device (e.g., the PMC2 125 of FIGS. 1 and 2 ).
- the STA1 115 also includes a first TDLS management module 210 .
- the first TDLS management module 210 performs TDLS handshaking operations with the AP module 130 during establishment of a TDLS session.
- the STA1 115 also includes a data packet buffer 215 communicatively coupled to the TDLS management module 210 .
- the data packet buffer 215 stores data packets sent to and received from the STA2 120 following the establishment of a TDLS session.
- the STA1 115 may also include a first protocol stack 220 communicatively coupled to the TDLS management module 210 and to the data packet buffer 215 .
- the first protocol stack 220 directs data flow between the STA1 115 and the STA2 120 across the TDLS link 112 following the establishment of a TDLS session.
- the first protocol stack 220 also directs the flow of BSS control frames between the TDLS management module 210 and the STA2 across the TDLS link 112 while the emulated AP 130 is sleeping.
- the AP module 130 further includes a second TDLS management module 225 .
- the second TDLS management module 225 is communicatively coupled to the first TDLS management module 210 via an interprocess communication link 135 .
- the second TDLS management module 225 initiates TDLS sessions and performs TDLS handshaking operations with the STA1 115 during the establishment of a TDLS session.
- the AP module 130 may also include a transmit buffer 230 communicatively coupled to the TDLS management module 225 .
- the transmit buffer 230 stores TDLS establishment messages received from the STA1 115 across the interprocess communication link 135 for transmission to the STA2 120 .
- the AP module 130 may also include a receive buffer 235 communicatively coupled to the second TDLS management module 225 .
- the receive buffer 235 stores TDLS response messages received from the STA2 120 prior to forwarding the response messages to the STA1 115 across the interprocess communication link 135 .
- the AP module 130 may include a second protocol stack 240 communicatively coupled to the transmit buffer 230 .
- the second protocol stack 240 causes TDLS request messages from the second TDLS management module 225 to be inserted into TDLS control frames for transmission to the STA2 120 across the TDLS setup link 140 .
- the second protocol stack 240 may also be communicatively coupled to the receive buffer 235 to direct incoming TDLS response messages to the receive buffer 235 .
- the AP module 130 also includes a basic service set (BSS) control module 245 communicatively coupled to the second protocol stack 240 .
- the BSS control module 245 generates BSS control frames, including beacon frames, for transmission to the STA2 120 across the TDLS setup link 140 .
- the BSS control module 245 also receives BSS control frame responses from the STA2 120 .
- BSS basic service set
- the PMC1 110 further includes a first transceiver 250 communicatively coupled to the STA1 115 and to the wireless AP emulation module 130 .
- the first transceiver 250 transmits outbound frames to a second transceiver 255 incorporated into the PMC2 125 .
- the first transceiver 250 also receives inbound frames from the second transceiver 255 . It is noted that some embodiments may include separate transceivers for the STA1 115 and the emulated AP 130 .
- the PMC1 110 may be capable of a bridged mode of operation. Operating in bridged mode, the PMC1 110 establishes separate TDLS links with the PMC2 125 and with one or more additional PMC devices (e.g. the PMC3 260 ), as further described below.
- the PMC1 110 may thus include a TDLS bridging module 265 coupled to the data packet buffer 215 .
- the TDLS bridging module 265 passes data packets between the STA2 and the STA3 during bridged-mode operation.
- Bridged-mode embodiments may enable communication between two or more PMC devices separated by a distance that might otherwise be too great for the respective stations to decode each other's transmissions.
- FIG. 3 is a sequence diagram 300 illustrating handshaking operations between a first wireless station incorporated into a first PMC device (e.g., the STA1 115 incorporated into the PMC1 110 ), a collocated emulated wireless AP (e.g., the AP module 130 ), and a second station incorporated into a second PMC device (e.g., the STA2 120 incorporated into the PMC2 125 ) according to various example embodiments.
- a first wireless station incorporated into a first PMC device
- a collocated emulated wireless AP e.g., the AP module 130
- a second station incorporated into a second PMC device e.g., the STA2 120 incorporated into the PMC2 125
- an application 270 executing at the first PMC 110 may request a TDLS session at a TDLS session request module 275 .
- the TDLS session request module 275 passes the TDLS session request to the second TDLS management module 225 at the AP module 130 .
- the second TDLS management module 225 initiates a TDLS setup sequence by sending a wake-up message 315 across the interprocess communication link 135 to the first TDLS management module 210 located at the STA1 115 .
- the wake-up message 315 enables the STA1 115 for participation in a TDLS exchange.
- the first TDLS management module 210 responds to the wake-up message 315 by sending a TDLS setup request message 320 A across the interprocess communication link 135 to a transmit buffer 230 associated with the AP module 130 .
- the AP module 130 forwards the TDLS setup request message 320 A (renamed to “TDLS setup request message 320 B”) across the TDLS setup link 140 of FIGS. 1 and 2 to the STA2 120 located at the PMC2 125 .
- the receive buffer 235 at the AP module 130 receives a TDLS setup response message 325 A from the STA2 120 .
- the AP 130 forwards the TDLS setup response message 325 A (renamed to “TDLS setup response message 325 B”) across the interprocess communication link 135 to the first TDLS management module 210 .
- a TDLS link (e.g., the TDLS link 112 of FIGS. 1 and 2 ) is established between the STA1 115 and the STA2 120 .
- the first TDLS management module 210 sends a TDLS setup confirmation message 330 to the STA2, either directly across the TDLS link 112 (e.g., the confirmation message 330 ) or via the AP 130 across the TDLS setup link 140 (e.g., the confirmation messages 330 A and 330 B). Thereafter, the STA1 115 and the STA2 120 may exchange TDLS session traffic 335 across the TDLS link 112 .
- FIG. 4 is a block diagram of a system 400 including three PMC devices capable of bridged communication according to various example embodiments.
- the system 400 includes PMC1 110 , as previously described in the context of FIGS. 1 and 2 .
- STA1 115 incorporated into PMC1 110 , is configured to communicate with STA2 120 incorporated into PMC2 125 and with STA3 455 incorporated into PMC3 260 .
- the PMC1 110 may act as a repeater for data flow between STA2 120 and STA3 455 .
- An emulated AP module 130 incorporated into the PMC1 110 may communicate with a collocated STA1 115 via an interprocess communication link 135 , as previously described. Operating together as previously described for the two station case, the AP module 130 and the STA1 115 may establish a first TDLS session across the first TDLS link 112 between the STA1 and the STA2 120 . The AP module 130 and the STA1 115 may also establish a second TDLS session across a second TDLS link 450 between the STA1 115 and the STA3 455 .
- the STA1 115 may operate as a communication bridge to pass TDLS messages between the STA2 120 and the STA3 455 , as previously described. In this mode, a bridged link may be established between the STA2 120 and the STA3 455 .
- the bridged link may be useful in the case of two stations separated by a distance that would otherwise be too great for accurate decoding of each other's transmissions.
- FIG. 5 is a sequence diagram 500 illustrating handshaking operations between a first wireless station incorporated into a first PMC device (e.g., the STA1 115 of FIG. 4 incorporated into the PMC1 110 ) with a collocated emulated wireless AP module (e.g., the wireless AP 130 ) and two additional wireless stations (e.g. the STA2 120 and the STA3 455 of FIG. 4 ) incorporated into second and third PMC devices (e.g., the PMC2 125 and the PMC3 260 of FIG. 4 ) according to various example embodiments.
- a first PMC device e.g., the STA1 115 of FIG. 4 incorporated into the PMC1 110
- a collocated emulated wireless AP module e.g., the wireless AP 130
- two additional wireless stations e.g. the STA2 120 and the STA3 455 of FIG. 4
- second and third PMC devices e.g., the PMC2 125 and
- a TDLS bridge request 515 may be received at the AP module 130 from either the STA2 120 or the STA3 455 .
- the TDLS bridge request 515 causes a wake-up message 520 to be issued by the AP module 130 and sent across the interprocess communication link 135 to the STA1 115 .
- the message 520 causes the STA1 115 to send a first TDLS setup request message 525 A to the AP module 130 .
- the AP module 130 forwards the first TDLS setup request message 525 A to the STA2 120 across the first TDLS setup link 140 as first TDLS setup request message 525 B.
- the AP module 130 receives a first TDLS setup response message 530 A from the STA2 120 at the first TDLS setup link 140 and forwards that message to the STA1 115 across the interprocess communication link 135 as first TDLS setup response message 530 B.
- the STA1 115 may send a first TDLS setup confirmation message 535 to the STA2 120 , either directly across the first TDLS link 112 or via the AP module 130 across the first TDLS setup link 140 .
- the latter technique is shown on the sequence diagram 500 as TDLS1 setup confirmation messages 535 A and 535 B.
- the second TDLS link 450 between the STA1 115 and the STA3 455 is set up in like manner. That is, the STA1 115 may send a second TDLS setup request message 540 A to the AP module 130 across the interprocess communication link 135 . The AP module 130 forwards the second TDLS setup request message 540 A to the STA3 455 across a second TDLS setup link 470 as TDLS setup request message 540 B.
- the AP module 130 receives a second TDLS setup response message 545 A from the STA3 455 at the second TDLS setup link 470 .
- the AP module 130 then forwards that message to the STA1 115 across the interprocess communication link 135 as second TDLS setup response message 545 B.
- the second TDLS link 450 has been established and the STA1 115 may send a second TDLS setup confirmation message 550 to the STA3 455 .
- the second TDLS setup confirmation message 550 may be sent either directly across the second TDLS link 450 or via the AP module 130 across the TDLS setup link 470 .
- the latter technique is shown on the sequence diagram 500 as TDLS2 confirmation messages 550 A and 550 B.
- TDLS session traffic 555 between the STA2 120 and the STA3 455 may be bridged by the STAT1 115 across the first and second TDLS links 112 and 450 , respectively.
- Such modules may include hardware circuitry, optical components, single or multi-processor circuits, memory circuits, and/or computer-readable media with computer instructions encoded therein/thereon and capable of being executed by a processor (excluding non-functional descriptive matter), firmware, and combinations thereof, as desired by the architects of the systems 100 , 200 , and 400 and as appropriate for particular implementations of various embodiments.
- Apparatus and systems described herein may be useful in applications other than enabling peer-to-peer and/or bridged communication between PMC devices operating as 802.11 stations.
- Examples of the systems 100 , 200 , and 400 described herein are intended to provide a general understanding of the structures of various embodiments. They are not intended to serve as complete descriptions of all elements and features of apparatus and systems that might make use of these structures.
- the various embodiments may be incorporated into electronic circuitry used in computers, communication and signal processing circuitry, single-processor or multi-processor modules, single or multiple embedded processors, multi-core processors, data switches, and application-specific modules including multi-layer, multi-chip modules, among others.
- Such apparatus and systems may further be included as sub-components within a variety of electronic systems, such as televisions, cellular telephones, personal computers (e.g., laptop computers, desktop computers, handheld computers, tablet computers, etc.), workstations, radios, video players, audio players (e.g., MP3 (Motion Picture Experts Group, Audio Layer 3) players), vehicles, medical devices (e.g., heart monitor, blood pressure monitor, etc.), set top boxes, and others.
- Some embodiments may also include one or more methods.
- FIGS. 6A and 6B are flow charts illustrating a number of methods associated with various example embodiments.
- a method 600 sequences to provide wireless peer-to-peer and/or bridged communication between PMC devices by establishing a TDLS session between a STA1 incorporated into a PMC1 and a STA2 incorporated into a PMC2.
- the method 600 commences at block 610 with emulating a wireless AP at the PMC1.
- the method 600 continues at block 615 with configuring the PMC1 with an interprocess communication link between the emulated wireless AP and the STA1.
- the method 600 includes sending a wake-up message from the emulated wireless AP to the STA1 to initiate establishment of the TDLS session, at block 620 .
- the method 600 proceeds at block 625 with sending a TDLS setup request message from the STA1 to the emulated wireless AP.
- the method 600 includes sending the TDLS setup request message from the emulated wireless AP to the STA2, at block 630 .
- the wireless AP sends the TDLS setup request message to the STA2 across a link corresponding to an infrastructure association between the wireless AP and the STA2 referred to herein as a “TDLS setup link.”
- the method also includes receiving a TDLS setup response message from the STA2 at the emulated wireless AP, at block 635 .
- the method 600 further includes sending the TDLS setup response message from the emulated wireless AP to the STA1, at block 640 .
- the method 600 may also include sending a TDLS setup confirmation message from the STA1 to the STA2 to confirm establishment of the TDLS session, at block 645 .
- the TDLS setup confirmation message may be sent directly from the STA1 to the STA2 across the newly-established TDLS link. Alternatively, the confirmation message may be sent via the emulated wireless AP across the TDLS setup link.
- the method 600 may proceed at block 650 with passing data packets between the STA1 and the STA2 across the TDLS link.
- the method 600 may continue at block 655 with performing wireless infrastructure management operations at the STA1. Such operations may include including originating network management frames other than beacons and receiving network management frame responses.
- the method 600 may also include allowing the wireless AP to sleep during the TDLS session, waking up periodically to send beacon frames, at block 660 . Doing so may permit longer sleep periods at the wireless AP.
- the STA1 and the wireless AP may have separate MAC addresses.
- the method 600 may test for this condition at block 670 .
- some versions of the method 600 may include MAC address “spoofing.” That is, a MAC source address associated with the wireless AP may be inserted into network management frames originating at the STA1 in order to spoof the STA2, at block 675 .
- the method 600 may perform additional power saving activities, as follows.
- the method 600 may include listening for a channel switch request from the STA2, at block 678 . If a channel switch request is received from the STA2, the method 600 may include sending a channel switch request from the STA1 to the STA2 in order to cancel the channel switch request received from the STA2, at block 680 . Doing so may permit the wireless AP to remain in sleep mode for an extended period of time.
- the method 600 may continue at block 682 with determining whether a transceiver channel assigned to carry TDLS data traffic between the STA1 and the STA2 is also assigned to carry wireless AP beacon traffic. If it is determined that the TDLS data traffic is assigned to a different channel than that of the wireless AP beacon traffic, the method 600 may include determining whether a TDLS channel timeout interval associated with the TDLS data traffic has expired, at block 686 . If the TDLS channel timeout interval has expired, the method 600 may also include switching the STA1 and the STA2 to the transceiver channel to which the wireless AP beacon traffic is assigned, at block 690 . The STA1 and the STA2 are each switched within an appropriate time period such that management frames may be exchanged without packet loss.
- the method 600 may continue at block 692 with transmitting frames across the TDLS link without requiring the transmission of traffic indication message (TIM) beacons.
- the method 600 may return to the beginning of block 660 in order to loop through the power saving activities represented by blocks 660 through 692 .
- TIM traffic indication message
- a method analogous to the method 600 may be performed by a PMC device incorporating an emulated AP in communication with two other PMC devices arranged in a bridged configuration as illustrated in FIG. 4 . Activities associated with the analogous method proceed as previously described with reference to FIG. 5 .
- the activities described herein may be executed in an order other than the order described.
- the various activities described with respect to the methods identified herein may also be executed in repetitive, serial, and/or parallel fashion.
- the method 600 may repeat in whole or in part as various applications associated with a PMC device are switched on and off during operation.
- Apparatus, systems, and methods described herein provide TDLS-based peer-to-peer and/or bridged communication between PMC devices operating in a wireless network such as an 802.11 network.
- a wireless network such as an 802.11 network.
- an emulated wireless AP module is allowed to sleep during the session, and need wake up only periodically to send infrastructure-mode beacon frames.
- the station module collocated with the wireless AP module handles infrastructure management frames during wireless AP sleep periods.
- inventive concept may include embodiments described in the example context of an Institute of Electrical and Electronic Engineers (IEEE) standard 802.xx implementation (e.g., 802.11, 802.11a, 802.11b, 802.11e, 802.11g, 802.16, 802.16eTM, etc.), the claims are not so limited. Additional information regarding the IEEE 802.11 standard may be found in ANSI/IEEE Std. 802.11, Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications (published 1999; reaffirmed June 2003).
- IEEE 802.xx e.g., 802.11a, 802.11b, 802.11e, 802.11g, 802.16, 802.16eTM, etc.
- IEEE 802.11a Supplement to IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications—High-speed Physical Layer in the 5 GHz Band (published 1999; reaffirmed Jun. 12, 2003). Additional information regarding the IEEE 802.11b protocol standard may be found in IEEE Std 802.11b, Supplement to IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Higher-Speed Physical Layer Extension in the 2.4 GHz Band (approved Sep.
- IEEE 802.11g protocol standard may be found in IEEE Std 802.11gTM, IEEE Std 802.11gTM, IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications Amendment 4: Further Higher Data Rate Extension in the 2.4 GHz Band (approved Jun. 12, 2003).
- Additional information regarding the IEEE 802.16 protocol standard may be found in IEEE Standard for Local and Metropolitan Area Networks—Part 16: Air Interface for Fixed Broadband Wireless Access Systems (published Oct. 1, 2004).
- Embodiments of the present invention may be implemented as part of a wired or wireless system. Examples may also include embodiments comprising multi-carrier wireless communication channels (e.g., orthogonal frequency division multiplexing (OFDM), discrete multitone (DMT), etc.) such as may be used within a wireless personal area network (WPAN), a wireless local area network (WLAN), a wireless metropolitan area network (WMAN), a wireless wide area network (WWAN), a cellular network, a third generation (3G) network, a fourth generation (4G) network, a universal mobile telephone system (UMTS), and like communication systems, without limitation.
- WPAN wireless personal area network
- WLAN wireless local area network
- WMAN wireless metropolitan area network
- WWAN wireless wide area network
- cellular network a third generation (3G) network
- 3G third generation
- 4G fourth generation
- UMTS universal mobile telephone system
- inventive subject matter may be referred to herein individually or collectively by the term “invention” merely for convenience and without intending to voluntarily limit this application to any single invention or inventive concept, if more than one is in fact disclosed.
- inventive concept any arrangement calculated to achieve the same purpose may be substituted for the specific embodiments shown.
- This disclosure is intended to cover any and all adaptations or variations of various embodiments.
Abstract
Apparatus, systems, and methods disclosed herein operate to provide wireless communication between personal mobile communication (PMC) devices. An emulated wireless access point (AP) at a first PMC device (PMC1) establishes a first tunneled direct link setup (TDLS) session between a first station module (STA1) incorporated into the PMC1 and a second station module (STA2) incorporated into a second PMC device (PMC2). Following establishment of the TDLS session, the wireless AP is allowed to sleep; and most infrastructure management duties are handled by the STA1 during the session. PMC device battery charge may be conserved as a result. The emulated wireless AP may also establish a second TDLS link to a third station module (STA3) incorporated into a third PMC device (PMC3). The STA1 may then bridge data traffic flow between the STA2 and the STA3. Such bridging operation may enable communication between two PMC devices otherwise unable to decode data received from the other.
Description
- This application is a division of application Ser. No. 13/109,974, filed May 17, 2011, which claims the benefit of Provisional Application No. 61/379,635, filed Sep. 2, 2010, the entireties of both of which are hereby incorporated by reference.
- Embodiments described herein relate to apparatus, systems and methods associated with wireless communication technology, including structures and methods associated with wireless peer-to-peer and bridged-device communication.
- Personal mobile communication (PMC) devices such as smart phones and Internet tablet computers are becoming increasingly ubiquitous. One factor driving the popularity of these devices is the rapid growth of so-called “social networking” applications and systems. Advances in social networking technology have enabled members of society to establish and maintain increasingly intimate social relationships across long distances via the Internet.
- Many PMC devices are designed to connect to the Internet wirelessly in order to support mobility. A PMC device may connect wirelessly via data links associated with a cell phone connection, a wide area networking connection such as an Institute of Electrical and Electronic Engineers (IEEE) 802.16 connection, and/or a local area networking connection such as an IEEE 802.11 connection, among others.
- Additional information regarding the IEEE 802.11 standard may be found in ANSI/IEEE Std. 802.11, Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications (published 1999; reaffirmed June 2003). Additional information regarding the IEEE 802.16 protocol standard may be found in IEEE Standard for Local and Metropolitan Area Networks—Part 16: Air Interface for Fixed Broadband Wireless Access Systems (published Oct. 1, 2004).
- In some cases, it may be desirable for two or more people within a local area to connect wirelessly and share data without traversing the Internet. People at a party or other gathering may, for example, wish to transfer pictures between PMC devices. The 802.11 specification supports such a connection in ad hoc mode. However, configuring a PMC device to operate in 802.11 ad hoc mode is cumbersome, rendering this technique inappropriate for impromptu data sharing. Other methods may utilize 802.11 infrastructure mode. However, an 802.11 infrastructure network is not always available on an impromptu basis when needed.
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FIG. 1 is a block diagram of a system including two PMC devices capable of wireless peer-to-peer communication according to various example embodiments of the invention. -
FIG. 2 is a detailed block diagram of a PMC device within a system according to various example embodiments. -
FIG. 3 is a sequence diagram illustrating handshaking operations between a first wireless station incorporated into a first PMC device, a collocated emulated wireless AP, and a second wireless station incorporated into a second PMC device according to various example embodiments. -
FIG. 4 is a block diagram of a system including three PMC devices capable of bridged communication according to various example embodiments. -
FIG. 5 is a sequence diagram illustrating handshaking operations between a first wireless station incorporated into a first PMC device with a collocated emulated wireless AP module and two additional wireless stations incorporated into second and third PMC devices, respectively, according to various example embodiments. -
FIGS. 6A and 6B are flow charts illustrating a number of methods associated with various example embodiments. - Embodiments and methods herein enable peer-to-peer and/or bridged communication between PMC devices operating as stations in a wireless network such as an 802.11 network. At least one of the PMC devices incorporates an emulated wireless AP module. The wireless AP module communicates in infrastructure mode with other in-range PMC devices. The wireless AP module establishes a tunneled direct-link setup (TDLS) session between a station module collocated with the wireless AP module and a station module incorporated into a second PMC device. In some embodiments, the emulated AP module may establish TDLS sessions between the collocated station module and station modules incorporated into two or more additional PMC devices. In that case, the collocated station module may bridge communication sessions between PMC devices that might otherwise be unable to decode each other's transmissions.
- After establishing the TDLS session, the wireless AP module is allowed to sleep, waking up periodically to send infrastructure-mode beacon frames. The station modules incorporated into the two PMC devices communicate directly thereafter within the TDLS session. The station module collocated with the wireless AP module may also handle infrastructure management frames that would otherwise be handled by the wireless AP module. These embodiments and methods provide local area peer-to-peer and/or bridged communication between PMC devices using existing 802.11 or similar station resources while conserving battery charge by limiting wireless AP activity.
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FIG. 1 is a block diagram of asystem 100 including two PMC devices capable of wireless peer-to-peer communication according to various example embodiments of the invention. A first PMC device (PMC1) 110 includes a first station module (STA1) 115. TheSTA1 115 is capable of entering into a TDLS session across aTDLS link 112 with a second station module (STA2) 120 located at a second PMC device (PMC2) 125. - The
PMC1 110 also includes an emulatedwireless AP module 130 communicatively coupled to theSTA1 115. TheAP module 130 communicates with theSTA2 120 in infrastructure mode to establish TDLS sessions between theSTA1 115 and theSTA2 120. An infrastructure association between thewireless AP module 130 and theSTA2 120 may be referred to hereinafter as a “TDLS setup link” (e.g., the TDLS setup link 140). - The
first PCM device 110 further includes aninterprocess communication link 135 coupled to theSTA1 115 and to theAP module 130. Theinterprocess communication link 135 provides a path for passing messages between theSTA1 115 and theAP module 130. TheSTA1 115 and theAP module 130 communicate across theinterprocess communication link 135 to establish TDLS sessions without passing over-the-air TDLS setup frames, as further described below. -
FIG. 2 is a detailed block diagram of a PMC device (e.g., thePMC1 110 ofFIGS. 1 and 2 ) within a system (e.g., thesystem 100 ofFIG. 1 ) according to various example embodiments. ThePMC1 110 includes collocated station and emulated wireless AP modules (e.g., theSTA1 115 and theAP module 130, respectively, ofFIGS. 1 and 2 ) and is capable of communicating with a second PMC device (e.g., thePMC2 125 ofFIGS. 1 and 2 ). - The STA1 115 also includes a first
TDLS management module 210. The firstTDLS management module 210 performs TDLS handshaking operations with theAP module 130 during establishment of a TDLS session. The STA1 115 also includes adata packet buffer 215 communicatively coupled to theTDLS management module 210. Thedata packet buffer 215 stores data packets sent to and received from theSTA2 120 following the establishment of a TDLS session. - The STA1 115 may also include a
first protocol stack 220 communicatively coupled to theTDLS management module 210 and to thedata packet buffer 215. The first protocol stack 220 directs data flow between theSTA1 115 and theSTA2 120 across theTDLS link 112 following the establishment of a TDLS session. Thefirst protocol stack 220 also directs the flow of BSS control frames between theTDLS management module 210 and the STA2 across theTDLS link 112 while the emulatedAP 130 is sleeping. - The
AP module 130 further includes a secondTDLS management module 225. The secondTDLS management module 225 is communicatively coupled to the firstTDLS management module 210 via aninterprocess communication link 135. The secondTDLS management module 225 initiates TDLS sessions and performs TDLS handshaking operations with theSTA1 115 during the establishment of a TDLS session. - The
AP module 130 may also include atransmit buffer 230 communicatively coupled to theTDLS management module 225. Thetransmit buffer 230 stores TDLS establishment messages received from theSTA1 115 across theinterprocess communication link 135 for transmission to theSTA2 120. TheAP module 130 may also include areceive buffer 235 communicatively coupled to the secondTDLS management module 225. The receivebuffer 235 stores TDLS response messages received from theSTA2 120 prior to forwarding the response messages to theSTA1 115 across theinterprocess communication link 135. - In some embodiments, the
AP module 130 may include asecond protocol stack 240 communicatively coupled to the transmitbuffer 230. Thesecond protocol stack 240 causes TDLS request messages from the secondTDLS management module 225 to be inserted into TDLS control frames for transmission to theSTA2 120 across theTDLS setup link 140. Thesecond protocol stack 240 may also be communicatively coupled to the receivebuffer 235 to direct incoming TDLS response messages to the receivebuffer 235. - The
AP module 130 also includes a basic service set (BSS)control module 245 communicatively coupled to thesecond protocol stack 240. TheBSS control module 245 generates BSS control frames, including beacon frames, for transmission to theSTA2 120 across theTDLS setup link 140. TheBSS control module 245 also receives BSS control frame responses from theSTA2 120. - The
PMC1 110 further includes afirst transceiver 250 communicatively coupled to theSTA1 115 and to the wirelessAP emulation module 130. Thefirst transceiver 250 transmits outbound frames to asecond transceiver 255 incorporated into thePMC2 125. Thefirst transceiver 250 also receives inbound frames from thesecond transceiver 255. It is noted that some embodiments may include separate transceivers for theSTA1 115 and the emulatedAP 130. - Some embodiments of the
PMC1 110 may be capable of a bridged mode of operation. Operating in bridged mode, thePMC1 110 establishes separate TDLS links with thePMC2 125 and with one or more additional PMC devices (e.g. the PMC3 260), as further described below. ThePMC1 110 may thus include aTDLS bridging module 265 coupled to thedata packet buffer 215. TheTDLS bridging module 265 passes data packets between the STA2 and the STA3 during bridged-mode operation. Bridged-mode embodiments may enable communication between two or more PMC devices separated by a distance that might otherwise be too great for the respective stations to decode each other's transmissions. -
FIG. 3 is a sequence diagram 300 illustrating handshaking operations between a first wireless station incorporated into a first PMC device (e.g., theSTA1 115 incorporated into the PMC1 110), a collocated emulated wireless AP (e.g., the AP module 130), and a second station incorporated into a second PMC device (e.g., theSTA2 120 incorporated into the PMC2 125) according to various example embodiments. - Referring to
FIG. 3 in light ofFIG. 2 , an application 270 executing at thefirst PMC 110 may request a TDLS session at a TDLSsession request module 275. The TDLSsession request module 275 passes the TDLS session request to the secondTDLS management module 225 at theAP module 130. The secondTDLS management module 225 initiates a TDLS setup sequence by sending a wake-upmessage 315 across the interprocess communication link 135 to the firstTDLS management module 210 located at theSTA1 115. The wake-upmessage 315 enables theSTA1 115 for participation in a TDLS exchange. - The first
TDLS management module 210 responds to the wake-upmessage 315 by sending a TDLSsetup request message 320A across the interprocess communication link 135 to a transmitbuffer 230 associated with theAP module 130. TheAP module 130 forwards the TDLSsetup request message 320A (renamed to “TDLSsetup request message 320B”) across the TDLS setup link 140 ofFIGS. 1 and 2 to theSTA2 120 located at thePMC2 125. - The receive
buffer 235 at theAP module 130 receives a TDLSsetup response message 325A from theSTA2 120. TheAP 130 forwards the TDLSsetup response message 325A (renamed to “TDLSsetup response message 325B”) across the interprocess communication link 135 to the firstTDLS management module 210. At this point, a TDLS link (e.g., the TDLS link 112 ofFIGS. 1 and 2 ) is established between theSTA1 115 and theSTA2 120. The firstTDLS management module 210 sends a TDLSsetup confirmation message 330 to the STA2, either directly across the TDLS link 112 (e.g., the confirmation message 330) or via theAP 130 across the TDLS setup link 140 (e.g., theconfirmation messages STA1 115 and theSTA2 120 may exchangeTDLS session traffic 335 across the TDLS link 112. -
FIG. 4 is a block diagram of asystem 400 including three PMC devices capable of bridged communication according to various example embodiments. Thesystem 400 includesPMC1 110, as previously described in the context ofFIGS. 1 and 2 .STA1 115, incorporated intoPMC1 110, is configured to communicate withSTA2 120 incorporated intoPMC2 125 and withSTA3 455 incorporated intoPMC3 260. ThePMC1 110 may act as a repeater for data flow betweenSTA2 120 andSTA3 455. - An emulated
AP module 130 incorporated into thePMC1 110 may communicate with a collocatedSTA1 115 via aninterprocess communication link 135, as previously described. Operating together as previously described for the two station case, theAP module 130 and theSTA1 115 may establish a first TDLS session across the first TDLS link 112 between the STA1 and theSTA2 120. TheAP module 130 and theSTA1 115 may also establish a second TDLS session across asecond TDLS link 450 between theSTA1 115 and theSTA3 455. - In some embodiments, the
STA1 115 may operate as a communication bridge to pass TDLS messages between theSTA2 120 and theSTA3 455, as previously described. In this mode, a bridged link may be established between theSTA2 120 and theSTA3 455. The bridged link may be useful in the case of two stations separated by a distance that would otherwise be too great for accurate decoding of each other's transmissions. -
FIG. 5 is a sequence diagram 500 illustrating handshaking operations between a first wireless station incorporated into a first PMC device (e.g., theSTA1 115 ofFIG. 4 incorporated into the PMC1 110) with a collocated emulated wireless AP module (e.g., the wireless AP 130) and two additional wireless stations (e.g. theSTA2 120 and theSTA3 455 ofFIG. 4 ) incorporated into second and third PMC devices (e.g., thePMC2 125 and thePMC3 260 ofFIG. 4 ) according to various example embodiments. - Referring to
FIG. 5 in light ofFIG. 4 , aTDLS bridge request 515 may be received at theAP module 130 from either theSTA2 120 or theSTA3 455. (The example ofFIG. 5 shows the bridge request originating at theSTA2 120 and being received at the firstTDLS setup link 140.) TheTDLS bridge request 515 causes a wake-upmessage 520 to be issued by theAP module 130 and sent across the interprocess communication link 135 to theSTA1 115. Themessage 520 causes theSTA1 115 to send a first TDLSsetup request message 525A to theAP module 130. TheAP module 130 forwards the first TDLSsetup request message 525A to theSTA2 120 across the first TDLS setup link 140 as first TDLSsetup request message 525B. - The
AP module 130 receives a first TDLSsetup response message 530A from theSTA2 120 at the firstTDLS setup link 140 and forwards that message to theSTA1 115 across theinterprocess communication link 135 as first TDLSsetup response message 530B. At this point the first TDLS link 112 has been established. TheSTA1 115 may send a first TDLSsetup confirmation message 535 to theSTA2 120, either directly across the first TDLS link 112 or via theAP module 130 across the firstTDLS setup link 140. The latter technique is shown on the sequence diagram 500 as TDLS1setup confirmation messages - The second TDLS link 450 between the
STA1 115 and theSTA3 455 is set up in like manner. That is, theSTA1 115 may send a second TDLSsetup request message 540A to theAP module 130 across theinterprocess communication link 135. TheAP module 130 forwards the second TDLSsetup request message 540A to theSTA3 455 across a second TDLS setup link 470 as TDLSsetup request message 540B. - The
AP module 130 receives a second TDLSsetup response message 545A from theSTA3 455 at the secondTDLS setup link 470. TheAP module 130 then forwards that message to theSTA1 115 across theinterprocess communication link 135 as second TDLSsetup response message 545B. At that point, thesecond TDLS link 450 has been established and theSTA1 115 may send a second TDLSsetup confirmation message 550 to theSTA3 455. The second TDLSsetup confirmation message 550 may be sent either directly across the second TDLS link 450 or via theAP module 130 across theTDLS setup link 470. The latter technique is shown on the sequence diagram 500 asTDLS2 confirmation messages TDLS session traffic 555 between theSTA2 120 and theSTA3 455 may be bridged by theSTAT1 115 across the first and second TDLS links 112 and 450, respectively. - The
systems PMC devices station modules AP module 130; theinterprocess communication link 135; theTDLS management modules buffers BSS control module 245; thetransceivers bridging module 265; the application 270; thesession request module 275; the sequence diagrams 300, 500; themessages session traffic - Such modules may include hardware circuitry, optical components, single or multi-processor circuits, memory circuits, and/or computer-readable media with computer instructions encoded therein/thereon and capable of being executed by a processor (excluding non-functional descriptive matter), firmware, and combinations thereof, as desired by the architects of the
systems - Apparatus and systems described herein may be useful in applications other than enabling peer-to-peer and/or bridged communication between PMC devices operating as 802.11 stations. Examples of the
systems - The various embodiments may be incorporated into electronic circuitry used in computers, communication and signal processing circuitry, single-processor or multi-processor modules, single or multiple embedded processors, multi-core processors, data switches, and application-specific modules including multi-layer, multi-chip modules, among others. Such apparatus and systems may further be included as sub-components within a variety of electronic systems, such as televisions, cellular telephones, personal computers (e.g., laptop computers, desktop computers, handheld computers, tablet computers, etc.), workstations, radios, video players, audio players (e.g., MP3 (Motion Picture Experts Group, Audio Layer 3) players), vehicles, medical devices (e.g., heart monitor, blood pressure monitor, etc.), set top boxes, and others. Some embodiments may also include one or more methods.
-
FIGS. 6A and 6B are flow charts illustrating a number of methods associated with various example embodiments. Amethod 600 sequences to provide wireless peer-to-peer and/or bridged communication between PMC devices by establishing a TDLS session between a STA1 incorporated into a PMC1 and a STA2 incorporated into a PMC2. - The
method 600 commences atblock 610 with emulating a wireless AP at the PMC1. Themethod 600 continues atblock 615 with configuring the PMC1 with an interprocess communication link between the emulated wireless AP and the STA1. Themethod 600 includes sending a wake-up message from the emulated wireless AP to the STA1 to initiate establishment of the TDLS session, atblock 620. - The
method 600 proceeds atblock 625 with sending a TDLS setup request message from the STA1 to the emulated wireless AP. Themethod 600 includes sending the TDLS setup request message from the emulated wireless AP to the STA2, atblock 630. The wireless AP sends the TDLS setup request message to the STA2 across a link corresponding to an infrastructure association between the wireless AP and the STA2 referred to herein as a “TDLS setup link.” The method also includes receiving a TDLS setup response message from the STA2 at the emulated wireless AP, atblock 635. Themethod 600 further includes sending the TDLS setup response message from the emulated wireless AP to the STA1, atblock 640. - The
method 600 may also include sending a TDLS setup confirmation message from the STA1 to the STA2 to confirm establishment of the TDLS session, atblock 645. The TDLS setup confirmation message may be sent directly from the STA1 to the STA2 across the newly-established TDLS link. Alternatively, the confirmation message may be sent via the emulated wireless AP across the TDLS setup link. Themethod 600 may proceed atblock 650 with passing data packets between the STA1 and the STA2 across the TDLS link. - The
method 600 may continue atblock 655 with performing wireless infrastructure management operations at the STA1. Such operations may include including originating network management frames other than beacons and receiving network management frame responses. Themethod 600 may also include allowing the wireless AP to sleep during the TDLS session, waking up periodically to send beacon frames, atblock 660. Doing so may permit longer sleep periods at the wireless AP. - In some embodiments, the STA1 and the wireless AP may have separate MAC addresses. The
method 600 may test for this condition atblock 670. In the case of separate MAC addresses, some versions of themethod 600 may include MAC address “spoofing.” That is, a MAC source address associated with the wireless AP may be inserted into network management frames originating at the STA1 in order to spoof the STA2, atblock 675. - The
method 600 may perform additional power saving activities, as follows. Themethod 600 may include listening for a channel switch request from the STA2, atblock 678. If a channel switch request is received from the STA2, themethod 600 may include sending a channel switch request from the STA1 to the STA2 in order to cancel the channel switch request received from the STA2, atblock 680. Doing so may permit the wireless AP to remain in sleep mode for an extended period of time. - The
method 600 may continue atblock 682 with determining whether a transceiver channel assigned to carry TDLS data traffic between the STA1 and the STA2 is also assigned to carry wireless AP beacon traffic. If it is determined that the TDLS data traffic is assigned to a different channel than that of the wireless AP beacon traffic, themethod 600 may include determining whether a TDLS channel timeout interval associated with the TDLS data traffic has expired, atblock 686. If the TDLS channel timeout interval has expired, themethod 600 may also include switching the STA1 and the STA2 to the transceiver channel to which the wireless AP beacon traffic is assigned, atblock 690. The STA1 and the STA2 are each switched within an appropriate time period such that management frames may be exchanged without packet loss. As a consequence of the above-described activities, themethod 600 may continue atblock 692 with transmitting frames across the TDLS link without requiring the transmission of traffic indication message (TIM) beacons. Themethod 600 may return to the beginning ofblock 660 in order to loop through the power saving activities represented byblocks 660 through 692. - A method analogous to the
method 600 may be performed by a PMC device incorporating an emulated AP in communication with two other PMC devices arranged in a bridged configuration as illustrated inFIG. 4 . Activities associated with the analogous method proceed as previously described with reference toFIG. 5 . - It is noted that the activities described herein may be executed in an order other than the order described. The various activities described with respect to the methods identified herein may also be executed in repetitive, serial, and/or parallel fashion. In some embodiments, for example, the
method 600 may repeat in whole or in part as various applications associated with a PMC device are switched on and off during operation. - Apparatus, systems, and methods described herein provide TDLS-based peer-to-peer and/or bridged communication between PMC devices operating in a wireless network such as an 802.11 network. After establishing a TDLS session, an emulated wireless AP module is allowed to sleep during the session, and need wake up only periodically to send infrastructure-mode beacon frames. The station module collocated with the wireless AP module handles infrastructure management frames during wireless AP sleep periods. These embodiments and methods may conserve battery charge by limiting wireless AP activity.
- Although the inventive concept may include embodiments described in the example context of an Institute of Electrical and Electronic Engineers (IEEE) standard 802.xx implementation (e.g., 802.11, 802.11a, 802.11b, 802.11e, 802.11g, 802.16, 802.16e™, etc.), the claims are not so limited. Additional information regarding the IEEE 802.11 standard may be found in ANSI/IEEE Std. 802.11, Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications (published 1999; reaffirmed June 2003). Additional information regarding the IEEE 802.11a protocol standard may be found in IEEE Std 802.11a, Supplement to IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications—High-speed Physical Layer in the 5 GHz Band (published 1999; reaffirmed Jun. 12, 2003). Additional information regarding the IEEE 802.11b protocol standard may be found in IEEE Std 802.11b, Supplement to IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Higher-Speed Physical Layer Extension in the 2.4 GHz Band (approved Sep. 16, 1999; reaffirmed Jun. 12, 2003). Additional information regarding the IEEE 802.11e standard may be found in IEEE 802.11e Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Amendment 8: Medium Access Control (MAC) Quality of Service Enhancements (published 2005). Additional information regarding the IEEE 802.11g protocol standard may be found in IEEE Std 802.11g™, IEEE Std 802.11g™, IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications Amendment 4: Further Higher Data Rate Extension in the 2.4 GHz Band (approved Jun. 12, 2003). Additional information regarding the IEEE 802.16 protocol standard may be found in IEEE Standard for Local and Metropolitan Area Networks—Part 16: Air Interface for Fixed Broadband Wireless Access Systems (published Oct. 1, 2004).
- Embodiments of the present invention may be implemented as part of a wired or wireless system. Examples may also include embodiments comprising multi-carrier wireless communication channels (e.g., orthogonal frequency division multiplexing (OFDM), discrete multitone (DMT), etc.) such as may be used within a wireless personal area network (WPAN), a wireless local area network (WLAN), a wireless metropolitan area network (WMAN), a wireless wide area network (WWAN), a cellular network, a third generation (3G) network, a fourth generation (4G) network, a universal mobile telephone system (UMTS), and like communication systems, without limitation.
- By way of illustration and not of limitation, the accompanying figures show specific embodiments in which the subject matter may be practiced. The embodiments illustrated are described in sufficient detail to enable those skilled in the art to practice the teachings disclosed herein. Other embodiments may be used and derived therefrom, such that structural and logical substitutions and changes may be made without departing from the scope of this disclosure. This Detailed Description, therefore, is not to be taken in a limiting sense. The breadth of various embodiments is defined by the appended claims and the full range of equivalents to which such claims are entitled.
- Such embodiments of the inventive subject matter may be referred to herein individually or collectively by the term “invention” merely for convenience and without intending to voluntarily limit this application to any single invention or inventive concept, if more than one is in fact disclosed. Thus, although specific embodiments have been illustrated and described herein, any arrangement calculated to achieve the same purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all adaptations or variations of various embodiments.
- The Abstract of the Disclosure is provided to comply with 37 C.F.R. §1.72(b) requiring an abstract that will allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In the preceding Detailed Description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted to require more features than are expressly recited in each claim. Rather, inventive subject matter may be found in less than all features of a single disclosed embodiment. The following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment.
Claims (10)
1. A personal mobile communication (PMC) device, comprising:
a first station module (STA1) to enter into a tunneled direct link setup (TDLS) session with at least one second station module (STA2) incorporated into at least one corresponding second PMC device (PMC2);
an emulated wireless access point (AP) module to establish the TDLS session; and
an interprocess communication link between the STA1 and the emulated wireless AP module to establish the TDLS session without having to communicate over-the-air between the STA1 and the emulated wireless AP module.
2. The PMC device of claim 1 , the STA1 further comprising:
a TDLS management module to perform TDLS handshaking operations with the emulated wireless AP module during the establishment of the TDLS session.
3. The PMC device of claim 2 , the STA1 further comprising:
a data packet buffer communicatively coupled to the TDLS management module to store data packets to be sent to the STA2 and data packets received from the STA2 after the establishment of the TDLS session; and
a TDLS bridging module communicatively coupled to the data packet buffer to pass data packets between the STA2 and a third station module incorporated into a third PMC device while the PMC device is operating in a bridged mode.
4. The PMC device of claim 3 , the STA1 further comprising:
a protocol stack communicatively coupled to the TDLS management module and to the data packet buffer to direct data flow between the STA1 and the STA2 and to direct the flow of basic service set control frames between the STA1 and the STA2 following the establishment of the TDLS session.
5. The PMC device of claim 1 , the emulated wireless AP module further comprising:
a TDLS management module to initiate the TDLS session and to perform TDLS handshaking operations with the STA1 during the establishment of the TDLS session.
6. The PMC device of claim 5 , the emulated wireless AP module further comprising:
a transmit buffer communicatively coupled to the TDLS management module to store TDLS establishment messages received from the STA1 for transmission to the STA2.
7. The PMC device of claim 6 , the emulated wireless AP module further comprising:
a receive buffer communicatively coupled to the TDLS management module to store TDLS establishment messages received from the STA2 for transmission to the STA1.
8. The PMC device of claim 7 , the emulated wireless AP module further comprising:
a protocol stack communicatively coupled to the transmit buffer to cause TDLS request messages from the TDLS management module to be inserted into TDLS control packets for transmission to the STA2, the protocol stack also communicatively coupled to the receive buffer to direct TDLS response messages received from the STA2 to the receive buffer.
9. The PMC device of claim 7 , the emulated wireless AP module further comprising:
a basic service set (BSS) control module communicatively coupled to the protocol stack to generate BSS control frames for transmission to the STA2 and to receive BSS control frame responses from the STA2.
10. The PMC device of claim 1 , further comprising:
a first transceiver communicatively coupled to the STA1 and to the emulated wireless AP module to transmit outbound frames to a second transceiver incorporated into the PMC2 and to receive inbound frames from the second transceiver.
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US11218942B2 (en) | 2013-09-19 | 2022-01-04 | Texas Instruments Incorporated | Simple mesh network for wireless transceivers |
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US20120127903A1 (en) | 2012-05-24 |
US8675529B2 (en) | 2014-03-18 |
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