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2. 发明授权

US06366572B1 Wireless communication system with symmetric communication protocol 失效
标题翻译：具有对称通信协议的无线通信系统
公开(公告)号：US06366572B1
公开(公告)日：2002-04-02
申请号：US09244572
申请日：1999-02-04
申请人： Aanand Esterberg , Jyun-Cheng Chen , Ali Akrouf
发明人： Aanand Esterberg , Jyun-Cheng Chen , Ali Akrouf
IPC分类号： H04B7216
CPC分类号： H04W52/383 , H04M1/72505 , H04M1/72513 , H04M1/72519 , H04W24/00 , H04W76/10
摘要： A symmetrical communication protocol allows handsets to operate as a master unit or a slave unit and operate independently of any base station. Remote units may contact each other directly with the calling unit being temporarily designated as a master unit and the called unit being designated temporarily as a slave unit. A wireless communication link is established between the two units and the units frequency-hop in synchronization in accordance with FCC requirements. The units independently monitor the signal strength of the incoming signal and can transmit power change commands to the other unit to increase or decrease transmission power as required. A calling unit initially transmits a call request on a limited number of the available frequency channels in order to decrease the acquisition time period. An idle unit has a sleep cycle and an awake cycle. When entering the awake cycle, the idle unit is programmed for operation at one of the acquisition channels and monitors for an incoming data frame intended for that unit. If a data frame is not detected, the unit returns to the sleep cycle. If a data frame is detected, the handsets synchronize and communicate over the entire range of operational frequency channels utilizing a predetermined pseudo-random sequence.
摘要翻译：对称的通信协议允许手机作为主单元或从单元操作，并独立于任何基站进行操作。远程单元可以直接与呼叫单元临时指定为主单元并且被叫单元临时指定为从单元。根据FCC的要求，在两个单元和单元频率跳跃之间建立无线通信链路同步。单元独立地监视输入信号的信号强度，并且可以向另一单元发送功率改变命令以根据需要增加或减少发射功率。呼叫单元最初在有限数量的可用频率信道上发送呼叫请求以减少获取时间段。空闲单元具有睡眠周期和唤醒周期。当进入唤醒周期时，空闲单元被编程为在一个采集通道上操作，并监视用于该单元的输入数据帧。如果未检测到数据帧，则本机返回到睡眠周期。如果检测到数据帧，则手机使用预定的伪随机序列在整个工作频率范围内同步和通信。

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