利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

25 条记录 (耗时 0.011 秒)

    RADIO COMMUNICATIONS SYSTEM USING A SCANNED DIRECTIONAL ANTENNA
    2.
    发明授权
    RADIO COMMUNICATIONS SYSTEM USING A SCANNED DIRECTIONAL ANTENNA 失效
    与ABTASTRICHTANTENNE无线电系统

    公开(公告)号：EP0670091B1

    公开(公告)日：2002-05-29

    申请号：EP94901458.3

    申请日：1993-11-17

    申请人： SBC TECHNOLOGY RESOURCES, INC.

    发明人： HARBIN, Steven, A. ,  RAINER, Brian, K.

    IPC分类号： H04B7/24

    CPC分类号： H04W16/28 ,  H01Q3/26 ,  H04B7/24

    摘要： A radio communication system (10) is disclosed which comprises a base station (12) for transmitting and receiving signals to and from one or more remote stations (16). The base station (12) is provided with at least one receive antenna (14) coupled to a base station receiver. The receive antenna (14) is provided with a directional pattern in a horizontal plane and a mechanism for steering the directional pattern azimuthly, until such time as a synchronization signal transmitted by a remote station located within the coverage area is received by the base station receiver. Upon detection of the synchronization signal, scanning of the receive antenna's pattern is stopped until such time as message information can be obtained from the remote station (16) and forwarded to a particular destination requested by the remote station. Upon receiving the information, the base station (12) will resume scanning of the antenna (14), and the information will be forwarded to its requested destination.

    Ethernet wide area network and method
    6.
    发明公开
    Ethernet wide area network and method 审中-公开
    以太网广域网和程序

    公开(公告)号：EP2267949A3

    公开(公告)日：2011-04-27

    申请号：EP10185351.3

    申请日：2003-05-05

    申请人： SBC Technology Resources, Inc.

    发明人： Chang, Frederick Robert ,  Chung, Soon Shih

    IPC分类号： H04L12/46

    CPC分类号： H04L12/4616

    摘要： An Ethernet wide area network (10; 30; 100; 130), comprising:
    a first local area network (18; 34) having a first root node (150) at a first Ethernet switch (16; 44), the first Ethernet switch having local control software including a maximum diameter discovery algorithm;
    a plurality of interconnected network Ethernet switches (12; 32; 132; 134, 136, 138), one (14; 62) of the plurality of interconnected network Ethernet switches connected to the first Ethernet switch (16; 44), at least one of the interconnected network Ethernet switches containing network control software including a medium access control (MAC) address re-mapping;
    an optical repeater (96) connected to a second (72, 74, 76) of the plurality of interconnected network Ethernet switches; and
    a second local area network (24; 36) having a third Ethernet switch (22; 46) that is connected to the second of the plurality of interconnected network Ethernet switches via the optical repeater (96).

    PUBLIC WIRELESS LOCAL AREA NETWORK
    8.
    发明公开
    PUBLIC WIRELESS LOCAL AREA NETWORK 审中-公开
    公共无线局域网

    公开(公告)号：EP1417851A1

    公开(公告)日：2004-05-12

    申请号：EP02770407.1

    申请日：2002-08-16

    申请人： SBC Technology Resources, Inc. ,  Chen, Weijing ,  Muhamed, Rias

    发明人： CHEN, Weijing ,  MUHAMED, Rias

    IPC分类号： H04Q7/20

    CPC分类号： H04W84/12 ,  H04W76/10 ,  H04W88/14

    摘要： A system for establishing a public wireless local area network comprises a public switched telephone network, a digital subscriber line access multiplexer, and at least one public telephone. The digital subscriber line access multiplexer and the at least one public telephone communicate with the public switched telephone network. A wireless local area network hub communicates with the public telephone and with the digital subscriber line access multiplexer, and is adapted to extend a digital subscriber line connection to at least one wireless communication device.

    METHOD FOR TESTING A COMMUNICATION CHANNEL
    10.
    发明公开
    METHOD FOR TESTING A COMMUNICATION CHANNEL 审中-公开
    检验方法的通信信道

    公开(公告)号：EP1269642A1

    公开(公告)日：2003-01-02

    申请号：EP01924405.2

    申请日：2001-03-28

    申请人： SBC Technology Resources, Inc.

    发明人： MILLER, William, Lee

    IPC分类号： H04B1/38

    CPC分类号： H04L43/50 ,  H04M3/2209 ,  H04M3/30

    摘要： A method of evaluating the characteristics of a subscriber loop associated with a customer modem comprises the steps of receiving line probing data from the modem and analyzing the line probing data to determine the circuit characteristics of the subscriber loop which relate to communication rate performance. The method generates a gain slope value (32) as a function of the line probing data which is indicative of the length of the subscriber loop. The method also generates a loaded slope value (34) as a function of the line probing data which is indicative of an inductive load on the subscriber loop. The method also generates an A/D value (36) as a function of the line probing data which is indicative of an analog-to-digital and digital-to-analog conversion on the subscriber loop. The method then outputs an expected communication rate for the subscriber loop as a function of the gain slope, loaded slope, and A/D values, thereby providing a circuit analysis of the customer subscriber loop.