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    Assisted handover in a wireless communication system
    1.
    发明授权
    Assisted handover in a wireless communication system 失效
    协助无线通讯系统切换

    公开(公告)号：US06728540B1

    公开(公告)日：2004-04-27

    申请号：US09037302

    申请日：1998-03-09

    申请人： Charles M. DeSantis ,  Raymond A. Sackett

    发明人： Charles M. DeSantis ,  Raymond A. Sackett

    IPC分类号： H04Q720

    CPC分类号： H04W36/0061

    摘要： An ongoing communication with a mobile in a current cell of a wireless cellular system is handed over to another cell using information regarding a set of potential handover candidates. This information is transmitted from a base station in the current cell or from another fixed part transmitter in the system. The set of handover candidates for a given mobile in the current cell is determined based on stored adjacency information regarding the cells which are adjacent to the current cell. This adjacency information may be stored after an initial system configuration, based on the actual physical layout of the cells, and may be altered during system operation to reflect the success or failure of particular attempted handovers. The set of potential handover candidates may be in the form of a list of beacons associated with the cells adjacent to the current cell, and may include corresponding channel identifying information such as frequency and time slot. The potential handover candidate information may be transmitted upon receipt of a handover assistance request from the mobile, or may be periodically broadcast throughout the system.

    摘要翻译： 使用关于一组潜在切换候选的信息将与无线蜂窝系统的当前小区中的移动站的持续通信切换到另一小区。 该信息从当前小区中的基站或系统中的另一个固定部分发射机发送。 基于存储的与当前小区相邻的小区的邻接信息来确定当前小区中的给定移动站的切换候选组。 这种邻接信息可以在初始系统配置之后，基于小区的实际物理布局来存储，并且可以在系统操作期间被改变以反映特定尝试切换的成功或失败。 潜在切换候选者的集合可以是与与当前小区相邻的小区相关联的信标的列表的形式，并且可以包括对应的信道标识信息，例如频率和时隙。 潜在的切换候选信息可以在从移动台接收到切换辅助请求时发送，或者可以在整个系统中周期性地广播。

    Wireless communication system using distributed switched antennas
    2.
    发明授权
    Wireless communication system using distributed switched antennas 失效
    使用分布式交换天线的无线通信系统

    公开(公告)号：US5628052A

    公开(公告)日：1997-05-06

    申请号：US304319

    申请日：1994-09-12

    申请人： Charles M. DeSantis ,  David J. Helmkamp ,  Raymond A. Sackett

    发明人： Charles M. DeSantis ,  David J. Helmkamp ,  Raymond A. Sackett

    IPC分类号： H04B7/06 ,  H04B7/26 ,  H04W88/08 ,  H04Q7/38

    CPC分类号： H04W88/085 ,  H04B7/061

    摘要： Increased coverage and macro diversity from a single base station in a wireless communication system by having a base station coupled to N antennas is described. Increased coverage and macro diversity are achieved by transmitting from the base station N control messages each via one of the antennas, and transmitting a data message addressed to a mobile unit via a particular one of the antennas previously assigned to the mobile unit for an active call. The mobile unit receives the control messages and the data message and analyzes the control messages to identify from the antennas a best antenna. The mobile unit then transmits to the base station a new antenna request identifying the best antenna in an uplink control slot of a frame. The uplink control field is associated with the particular one of the antennas. The base station uses the best antenna to transmit subsequent data messages addressed to the mobile unit. A random access technique, to allow mobile units that are going from an inactive status to an active status, is provided by connecting all base station antennas together during non-call-affiliated slots in the uplink portion of the frame.

    摘要翻译： 描述了通过具有耦合到N个天线的基站从无线通信系统中的单个基站增加的覆盖和宏分集。 通过从基站通过天线之一发送N个控制消息来实现增加的覆盖和宏分集，并且通过先前分配给移动单元的特定一个天线发送寻址到移动单元的数据消息用于主动呼叫 。 移动单元接收控制消息和数据消息，并分析控制消息以从天线中识别最佳天线。 然后，移动单元向基站发送在帧的上行链路控制时隙中识别最佳天线的新天线请求。 上行链路控制字段与特定的天线相关联。 基站使用最佳天线来发送寻址到移动单元的后续数据消息。 通过在帧的上行链路部分中的非呼叫附属时隙期间将所有基站天线连接在一起来提供随机接入技术，以允许从非活动状态进入活动状态的移动单元。