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1. 发明授权

US5628052A Wireless communication system using distributed switched antennas 失效
标题翻译：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。

2. 发明授权

US5265150A Automatically configuring wireless PBX system 失效
标题翻译：自动配置无线PBX系统
公开(公告)号：US5265150A
公开(公告)日：1993-11-23
申请号：US647943
申请日：1991-01-30
申请人： David J. Helmkamp , James W. Smith
发明人： David J. Helmkamp , James W. Smith
IPC分类号： H04B7/26 , H04M3/42 , H04Q3/58 , H04W16/26 , H04W84/16 , H04M11/00 , H04B1/00 , H04B7/15
CPC分类号： H04W84/16 , H04B7/2606 , H04W16/26
摘要： A wireless PBX system provides ease of installation without site engineering or trial-and-error placement of components within the system. In its basic form, the wireless PBX system consists of only two types of components: a control unit including an radio frequency transceiver; and fixed location terminals, such as telephones and voice/data stations, which also include radio frequency transceivers. Portable handsets are optionally included in the system to allow for customer mobility. Installation of the PBX system is achieved simply by placing the system components in the desired locations at a premises, plugging them into line power, and performing some simple programming steps including a final step of initiating an automatic configuring process. Through this process, the system automatically configures itself for optimum operation in view of the radio environment and placement of components within the system at the customer premises. In the operation of this process, the control unit exchanges various radio messages with the terminals, decides which terminals should also serve as repeaters for linking those more distantly located terminals, and determines the appropriate frame structure for the system. A positive display indication at the control unit, following the end of the automatic configuring process, shows that all terminals have been linked and that the system is operating normally.

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