公开(公告)号：US4593282A

公开(公告)日：1986-06-03

申请号：US485034

申请日：1983-04-14

申请人： Anthony Acampora ,  Michael G. Hluchjy ,  Chan D. Tsao

发明人： Anthony Acampora ,  Michael G. Hluchjy ,  Chan D. Tsao

IPC分类号： H04J3/24 ,  H04L12/413 ,  H04L12/64 ,  H04J3/02

CPC分类号： H04L12/4135 ,  H04L12/64

摘要： Contention among a plurality of synchronous and asynchronous devices connected to a shared communication medium for access to time slots in a sequence of frames is resolved by assigning a unique priority word including a priority code prefix to each device and granting access to a given slot by comparing the values of the priority words assigned to competing devices. The priority code prefix is assigned as a joint function of whether synchronous or asynchronous communication is desired and whether synchronous communication is being initiated or continued. In each assignment protocol, synchronous communication is enabled by assuring any device that initially gains access to a particular time slot continued access to the same slot in succeeding frames. If desired, devices with synchronous access may relinquish unused time slots to asynchronous traffic, while reserving the ability to resume synchronous communication.

摘要翻译： 通过向每个设备分配包括优先级码前缀的唯一优先级字，并且通过比较来给予给定时隙的访问来解决连接到用于访问帧序列中的时隙的共享通信介质的多个同步和异步设备之间的争用 分配给竞争设备的优先级字的值。 优先级码前缀被分配为是否需要同步或异步通信以及正在启动还是继续同步通信的联合功能。 在每个分配协议中，同步通信通过确保最初获得对特定时隙的访问的任何设备在后续帧中持续访问相同的时隙来启用。 如果需要，具有同步访问的设备可以将未使用的时隙放弃到异步流量，同时保留恢复同步通信的能力。