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11. 发明授权

US5053946A Token ring network having token request mechanism 失效
标题翻译：令牌环网络具有令牌请求机制
公开(公告)号：US5053946A
公开(公告)日：1991-10-01
申请号：US519313
申请日：1990-05-07
申请人： Rajendra K. Jain
发明人： Rajendra K. Jain
IPC分类号： H04L12/433
CPC分类号： H04L12/433
摘要： A token ring network includes a plurality of stations interconnected to transmit frames containing information. A station may originate a frame transmission if it has information to transmit and if it is holding a token. A frame includes the information and a token request flag initialized to a selected condition. While one station is originating transmission of the frame around the network, if another station needs to transmit a frame, that station conditions the token request flag to another predetermined condition. The originating station receives the frame and examines the token request flag. If the token request flag has the predetermined condition, it transmits the token over the network to permit another station to originate a frame transmission. Thus, unless another station needs to transmit a frame, as indicated to the originating station by the condition of the token request flag, the originating station may continue to transmit, and so the time an originating station may transmit is not limited to any arbitrary time period.
摘要翻译：令牌环网包括互连以发送包含信息的帧的多个站。如果站具有要发送的信息并且它正在保存令牌，则站可以发起帧传输。帧包括初始化为所选条件的信息和令牌请求标志。虽然一个站是围绕网络发起帧的发送，但是如果另一站需要发送一个帧，则该站将令牌请求标志条件调节到另一个预定条件。发起站接收帧并检查令牌请求标志。如果令牌请求标志具有预定条件，则其通过网络发送令牌，以允许另一个站发起帧传输。因此，除非另一个站需要通过令牌请求标志的条件发送帧，如始发站所指示的那样，始发站可以继续发送，因此始发站可以发送的时间不限于任何任意时间期。

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