Patents Examined by Trinh Tan
  • Patent number: 7016702
    Abstract: The present invention relates to a method and system using dynamic beam forming for wireless communication signals in a wireless network. Base stations and/or UEs are provided with antenna systems having a range of beam forming selections. Relative base station and UE locations are one type of criteria used to make beam forming decisions.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: March 21, 2006
    Assignee: InterDigital Technology Corporation
    Inventor: Prabhakar R. Chitrapu
  • Patent number: 7006830
    Abstract: To provide a wireless communication system and a wireless communication method including: a first terminal apparatus comprising a computer main body and a second terminal apparatus comprising a displaying section, wherein the two terminal apparatuses perform wireless communication with each other without communication crossing. A management center obtains the positional information of a first terminal apparatus, and then records the positional information. The management center determines a communication channel free from communication crossing, depending on the positional information. The communication channel determined by the management center is transmitted to the first terminal apparatus. The first terminal apparatus and a second terminal apparatus perform wireless communication with each other through the received communication channel.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: February 28, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kazuhiro Shiraga
  • Patent number: 6889056
    Abstract: The present invention provides a transmission control scheme for wireless digital networks comprised of a plurality of access points each communicating with access terminals, which improves data throughput to access terminals located in areas where interference from the neighboring access points are high. Generally, under the transmission control scheme according to the present invention, the access points are controlled so that neighboring access points will not transmit signals simultaneously with transmission parameters providing high robustness. The transmission parameters include, for instance, transmission power, a modulation scheme and a coding rate. Higher power transmission achieves higher robustness. Transmission at a lower modulation level achieves higher robustness. Transmission at a lower coding rate achieves higher robustness.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: May 3, 2005
    Assignee: NTT DoCoMo, Inc.
    Inventor: Akira Shibutani
  • Patent number: 6829484
    Abstract: In a mobile communicating system, a mobile terminal has a position information detecting unit detecting position information, a position information transmitting unit transmitting position information to an information center, an up-load data transmitting unit transmitting up-load data to the information center and an information/service utilizing unit utilizing information/service from the information center.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: December 7, 2004
    Assignee: Fujitsu Limited
    Inventors: Takashi Kimoto, Tamio Saito, Masanaga Tokuyo, Satoru Chikuma, Takashi Nishigaya, Nobutsugu Fujino
  • Patent number: 6801754
    Abstract: A system and method are disclosed to provide increased signaling in a communications system. A repeater system is operable to receive and store operating characteristic data from a communications unit, the repeater transmitting at least some of the stored operating characteristic data during a detected break in transmission.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: October 5, 2004
    Assignee: Motorola Inc.
    Inventors: Sumit A. Talwalkar, Vijay Nangia, Leng H. Ooi
  • Patent number: 6643504
    Abstract: Automatic activation (i.e., first time access) of digital wireless/cellular mobile telephones with a private/localized wireless/cellular system (i.e. a secondary system) occurs within an area having an overlapping macrocellular primary wireless communication system (i.e., a dominant system). Operation of the secondary access procedure is achieved by shielding/masking an access and authentication process for the secondary system from interference from the control signal levels of the dominant wireless communication system. During the first time access, the secondary system is supplied with the SID and MIN and ESN numbers for authentication and resultant access.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: November 4, 2003
    Assignee: AT&T Corp.
    Inventors: Albert T. Chow, Richard Henry Erving, Robert Raymond Miller, II, Christopher W. Rice, Jesse Eugene Russell, Wenchu Ying