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    METHOD AND SYSTEM FOR IMPROVING RESPONSIVENESS IN EXCHANGING FRAMES IN A WIRELESS LOCAL AREA NETWORK
    51.
    发明专利
    METHOD AND SYSTEM FOR IMPROVING RESPONSIVENESS IN EXCHANGING FRAMES IN A WIRELESS LOCAL AREA NETWORK 未知

    公开(公告)号：MY157720A

    公开(公告)日：2016-07-15

    申请号：MYPI20061452

    申请日：2006-03-31

    Applicant: INTERDIGITAL TECH CORP

    Inventor： CHANDRA ARTY ,  ZEIRA ELDAD ,  SAMMOUR MOHAMMED ,  GRANDHI SUDHEER A

    IPC: H04L1/18

    Abstract: A METHOD AND SYSTEM FOR IMPROVING RESPONSIVENESS IN EXCHANGING MANAGEMENT AND CONTROL FRAMES IN A WIRELESS LOCAL AREA NETWORK ARE DISCLOSED. AN INITIATOR (102, 202, 302, 402, 502, 602) SENDS A FRAME (ACTION, MANAGEMENT, CONTROL OR DATA FRAME) TO A RESPONDER (104, 204, 304, 404, 504, 604). UPON CORRECTLY RECEIVING THE FRAME, THE RESPONDER (104, 204, 304, 404, 504, 604) SENDS A RESPONSE FRAME TO THE INITIATOR (102, 202, 302, 402, 502, 602) INSTEAD OF DIRECTLY SENDING AN ACKNOWLEDGEMENT, ACK PACKET. THE RESPONDER (104, 204, 304, 404, 504) PREFERABLY ACCESSES THE WIRELESS MEDIUM TO SEND THE RESPONSE FRAME IN A SHORT INTER-FRAME SPACING, SIFS. WITH THIS SCHEME, A LONG DELAY ASSOCIATED WITH HAVING TO CONTEND FOR THE WIRELESS MEDIUM TO SEND THE RESPONSE FRAME IS AVOIDED AND THEREFORE, THE RESPONSIVENESS AND TIMELINESS OF THE FEEDBACK MECHANISM IS SIGNIFICANTLY ENHANCED. THE RESPONSE FRAME MAY BE PIGGYBACKED ON OR AGGREGATED WITH ANOTHER PACKET. THE MOST ILLUSTRATIVE DRAWING IS

    METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING
    52.
    发明专利
    METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING 未知

    公开(公告)号：CA2771267C

    公开(公告)日：2016-03-15

    申请号：CA2771267

    申请日：2005-08-11

    Applicant: INTERDIGITAL TECH CORP

    Inventor： KWAK JAEYOUNG ,  OLESEN ROBERT LIND ,  BULTAN AYKUT ,  ZEIRA ELDAD ,  KOO CHANG-SOO ,  OZLUTURK FATIH ,  HUANG YUEJIN ,  PASAD KALPENDU R

    IPC: H04J99/00 ,  H04W24/00 ,  H04B7/06 ,  H04J11/00 ,  H04W88/02 ,  H04W88/08

    Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen- beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen- beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

    Peer-to-peer wireless communication system
    59.
    发明专利
    Peer-to-peer wireless communication system 未知

    公开(公告)号：AU2014253536A1

    公开(公告)日：2014-11-13

    申请号：AU2014253536

    申请日：2014-10-24

    Applicant: INTERDIGITAL TECH CORP

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

    IPC: H04W28/16 ,  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. 1Q, 104 114-- 106 120 108- LO1= E 12a QSTAb ST

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