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    PEER-TO-PEER WIRELESS COMMUNICATION SYSTEM
    12.
    发明公开
    PEER-TO-PEER WIRELESS COMMUNICATION SYSTEM 审中-公开
    无线对等通信系统

    公开(公告)号：EP1842383A4

    公开(公告)日：2013-01-23

    申请号：EP06718848

    申请日：2006-01-19

    Applicant: INTERDIGITAL TECH CORP

    Inventor： CHANDRA ARTY ,  LEVY JOSEPH S ,  GRANDHI SUDHEER A ,  ZEIRA ELDAD

    IPC: H04W76/02 ,  H04W28/16 ,  H04W84/18

    CPC classification number: H04W28/16 ,  H04W76/023 ,  H04W84/18

    Abstract: A peer-to-peer communication system using a direct link setup (DLS) is disclosed. A mobile station (STA) establishes a direct communication link with another STA by sending a message requesting a DLS to an access point (AP), (i.e., a centralized controller). The AP may accept or reject the DLS request based on channel measurements. If the DLS request is accepted, the DLS is established such that the STAs may directly communicate with each other. An established DLS connection may be torn down by the AP sending a message including a DLS teardown request to one of the STAs, or based on channel measurements. The system may be an Ad hoc network comprising a plurality of STAs without an AP where each STA maintains a database of one-hop and two-hop STAs, and establishes a direct link to other STAs after informing neighboring STAs of an intention to establish a direct communication link.

    METHODS AND SYSTEMS FOR PROVIDING EFFICIENT OPERATION OF MULTIPLE MODES IN A WLAN SYSTEM
    16.
    发明专利
    METHODS AND SYSTEMS FOR PROVIDING EFFICIENT OPERATION OF MULTIPLE MODES IN A WLAN SYSTEM 未知

    公开(公告)号：CA2636133C

    公开(公告)日：2015-09-01

    申请号：CA2636133

    申请日：2007-01-03

    Applicant: INTERDIGITAL TECH CORP

    Inventor： GRANDHI SUDHEER A ,  SAMMOUR MOHAMMED ,  LEVY JOSEPH S

    IPC: H04W88/10

    Abstract: A method and system applies MAC transmission opportunity (TXOP) protection for multiple mode operation in a WLAN system. In particular, MAC mechanisms are defined to support multiple mode CTS frames, and multiple mode CF-End frames sent by the AP, each in a format appropriate for the corresponding mode which also applies to a single mode as a trivial case. MAC mechanisms permit truncation of TXOP duration for releasing the unused portion of the TXOP when no further data for transmission is available. Release of unused protected TXOP is possible for both protected AP transmissions and STA transmissions.

    METHOD AND SYSTEM FOR CONTROLLING ACCESS TO A WIRELESS COMMUNICATION MEDIUM
    17.
    发明专利
    METHOD AND SYSTEM FOR CONTROLLING ACCESS TO A WIRELESS COMMUNICATION MEDIUM 未知

    公开(公告)号：CA2576833C

    公开(公告)日：2014-10-28

    申请号：CA2576833

    申请日：2005-08-05

    Applicant: INTERDIGITAL TECH CORP

    Inventor： GRANDHI SUDHEER A ,  CHANDRA ARTY ,  LEVY JOSEPH S ,  SHAHEEN KAMEL M ,  TERRY STEPHEN E ,  ZEIRA ELDAD

    IPC: H04L12/28 ,  H04W74/04

    Abstract: A method and system for controlling access to a wireless communication medium. The system includes at least one access point (AP) and at least one station (STA). The AP defines a superframe for transmission of data in a time domain having a high throughput (HT) period which includes at least one scheduled resource allocation (SRA) and at least one management SRA (MSRA). The AP broadcasts an extended beacon (EB) including information about the SRA and MSRA. The SRA is defined for transmitting traffic data between the AP and the STA, and the MSRA is defined for transmitting management and control data between the AP and the STA. The system reduces station battery consumption, supports higher throughput for non-real time (NRT) traffic and is more efficient for real time (RT) traffic while maintaining full compatibility.

    Peer-to-peer wireless communication system
    18.
    发明专利
    Peer-to-peer wireless communication system 未知

    公开(公告)号：AU2010200615B2

    公开(公告)日：2012-09-13

    申请号：AU2010200615

    申请日：2010-02-19

    Applicant: INTERDIGITAL TECH CORP

    Inventor： CHANDRA ARTY ,  LEVY JOSEPH S ,  GRANDHI SUDHEER A ,  ZEIRA ELDAD

    IPC: H04W28/16 ,  H04L12/56 ,  H04W84/18

    Abstract: A peer-to-peer communication system using a direct link setup (DLS) is disclosed. A mobile station (STA) establishes a direct communication link with another STA by sending a message requesting a DLS to an access point (AP), (i.e., a centralized controller). The AP may accept or reject the DLS request based on channel measurements. If the DLS request is accepted, the DLS is established such that the STAs may directly communicate with each other. An established DLS connection may be torn down by the AP sending a message including a DLS teardown request to one of the STAs, or based on channel measurements. The system may be an AD hoc network including a plurality of STAs without an AP where each STA maintains a database of one-hop and two hop STAs, and establishes a direct link to other STAs after informing neighboring STAs of an intention to establish a direct communication link. &104 102- u2 'a UA C3 z 120b N'N QSTA 1- L (D 12b a --. 120a 12a- QSTA FIG, 1

    Methods and systems for providing efficient operation of multiple modes in a WLAN system
    19.
    发明专利
    Methods and systems for providing efficient operation of multiple modes in a WLAN system 未知

    公开(公告)号：AU2011253642A1

    公开(公告)日：2011-12-15

    申请号：AU2011253642

    申请日：2011-11-24

    Applicant: INTERDIGITAL TECH CORP

    Inventor： GRANDHI SUDHEER A ,  MOHAMMED SAMMOUR ,  LEVY JOSEPH S

    IPC: H04L12/28

    Abstract: A method and system applies MAC transmission opportunity (TXOP) protection for multiple mode operation in a WLAN system. In particular, MAC 5 mechanisms are defined to support multiple mode CTS frames, and multiple mode CF-End frames sent by the AP, each in a format appropriate for the corresponding mode which also applies to a single mode as a trivial case. MAC mechanisms permit truncation of TXOP duration for releasing the unused portion of the TXOP when no further data for transmission is available. Release of 10 unused protected TXOP is possible for both protected AP transmissions and STA transmissions.

    METHOD AND SIGNALING PROCEDURE FOR TRANSMISSION OPPORTUNITY USAGE IN A WIRELESS MESH NETWORK
    20.
    发明专利
    METHOD AND SIGNALING PROCEDURE FOR TRANSMISSION OPPORTUNITY USAGE IN A WIRELESS MESH NETWORK 未知

    公开(公告)号：SG171603A1

    公开(公告)日：2011-06-29

    申请号：SG2011028867

    申请日：2007-04-24

    Applicant: INTERDIGITAL TECH CORP

    Inventor： ZUNIGA JUAN CARLOS ,  RUDOLF MARIAN ,  GRANDHI SUDHEER A ,  LEVY JOSEPH S

    Abstract: In accordance with a preferred embodiment, the present invention comprises a method for using the remaining Tx0P time by the peer node to forward traffic to a different destination, a method for using the remaining Tx0P time by the original node to send traffic to a different destination, a method for using the remaining Tx0P time by a neighbor to send traffic to the original node, a method for using the remaining Tx0P time by a neighbor to send traffic to another node, a method to signal the reuse rules of the remaining Tx0P time, and a method to efficiently relinquish/truncate a Tx0P to reset the NAV for the neighborhood. Figure: 3

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