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    • 4. 发明授权
    • Wireless communication system and wireless terminal device using fixed
length communication frame
    • 无线通信系统和使用固定长度通信帧的无线终端设备
    • US5559804A
    • 1996-09-24
    • US230773
    • 1994-04-21
    • Eiichi AmadaYoshihiro TakiyasuTomoaki IshifujiGenichi IshiiHidehiko JusaShuichi Adachi
    • Eiichi AmadaYoshihiro TakiyasuTomoaki IshifujiGenichi IshiiHidehiko JusaShuichi Adachi
    • H04L12/28H04L12/46H04W52/02H04W74/04H04W74/08H04W84/12H04W88/08H04J3/00
    • H04W72/0406H04W8/26Y02B60/50
    • A wireless communication system includes a plurality of wireless terminals and a base station for periodically generating a fixed-length communication frame composed of an information field which includes a plurality of information slots, and first and second control fields which are arranged preceding the information field and each of which includes a plurality of time slots. Each time slot of the first control field of each communication frame is used for allowing the base station to send control data for designating a terminal which is to make the transmission or reception of data in one information slot of the information field, and each time slot of the second control field thereof is used for allowing one wireless terminal to send control data indicating a requirement for assignment of an information slot for data transmission. Each wireless terminal, when receiving control data inclusive of an address of that terminal in the i-th time slot of the first control field of each communication frame, makes the reception or transmission of data in the i-th information slot in the information field of that communication frame. When the control data is not found out in the first control field, the power source of a reception unit of the wireless terminal is turned off during a period of time until the next communication frame is generated.
    • 无线通信系统包括多个无线终端和用于周期性地生成由包括多个信息时隙的信息字段组成的固定长度通信帧的基站,以及布置在信息字段之前的第一和第二控制字段,以及 其中每一个包括多个时隙。 每个通信帧的第一控制字段的每个时隙用于允许基站发送用于指定要在信息字段的一个信息时隙中发送或接收数据的终端的控制数据,并且每个时隙 用于允许一个无线终端发送指示用于分配用于数据传输的信息时隙的要求的控制数据。 每个无线终端在每个通信帧的第一控制字段的第i个时隙中接收到包括该终端的地址的控制数据时,在信息字段中的第i个信息时隙中接收或发送数据 的通信帧。 当在第一控制字段中没有发现控制数据时,无线终端的接收单元的电源在直到生成下一个通信帧的时间段内被关闭。
    • 5. 发明授权
    • Wireless LAN system and base station apparatus
    • 无线局域网系统和基站装置
    • US5822361A
    • 1998-10-13
    • US555512
    • 1995-11-08
    • Kazunori NakamuraHidehiko JusaAtsushi Anzai
    • Kazunori NakamuraHidehiko JusaAtsushi Anzai
    • H04L12/28H04B1/713
    • H04B1/7143H04B2001/7154H04W24/00H04W8/26H04W84/12H04W88/08H04W92/20
    • A wireless LAN system which allows the transmission and reception of various data without lowering the transmission efficiency and the transmission quality even in an overlapping environment of areas of a plurality of wireless LANs and a base station apparatus therefor are provided. The wireless LAN system has a plurality of wireless LANs including base stations and wireless terminal devices, and the base stations and the wireless terminal devices in the wireless LANs communicate while sequentially hopping carrier frequencies to conduct the intercommunication between the base stations in the wireless LANs through inter-base station communication units. Each base station includes a unit for transmitting and receiving a specific frame to and from other base stations through the inter-base station communication unit to determine whether its own base station is a master base station or not and a unit for assigning different hopping start frequencies to its own base station and other base stations when its own base station is determined as the master base station.
    • 提供一种无线LAN系统,其即使在多个无线LAN的区域的重叠环境及其基站装置中也能够不降低传输效率和传输质量而允许各种数据的发送和接收。 无线LAN系统具有包括基站和无线终端装置在内的多个无线LAN,并且无线LAN中的基站和无线终端装置在顺序地跳跃载波频率的同时进行通信,从而通过无线LAN中的基站之间的相互通信 基站间通信单元。 每个基站包括用于通过基站间通信单元向其他基站发送和从其他基站接收特定帧的单元,以确定其自己的基站是否是主基站,以及用于分配不同跳频起始频率的单元 当其自己的基站被确定为主基站时,到其自己的基站和其他基站。