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    • 7. 发明授权
    • Multi-frame transmission control for token ring networks
    • 令牌环网络的多帧传输控制
    • US4964113A
    • 1990-10-16
    • US424850
    • 1989-10-20
    • Joel Erwin GeyerJoseph K. LeeKenneth T. Wilson
    • Joel Erwin GeyerJoseph K. LeeKenneth T. Wilson
    • H04L12/433
    • H04L12/433
    • A method and apparatus for enabling the transmitter to decide the number of variable length frames that can be trasmitted within the token holding timer (THT) window. The last frame decision algorithm enables the transmitter to set the intermediate frame bit in the ending delimiter to the right state to indicate the status of each frame in the transmitted frame sequence. A look-ahead technique is used to check the remaining transmit time available in the THT time window, therefor, no ring bandwidth is wasted on partially transmitted aborated frames, effectively optimizing the throughput of the network. Since key variables in the last frame decision algoritm are softwar programmable, the algorithm is independent of ring speed. The algorithm counts transmitted octets instead of measuring transmission time in deciding whether to transmit an additional frame. The algorithm can be applied to either signal frame or multi-frame transmit mode and to either normal or early token release. It is applicable to both the IEEE 802.5 local area network standard for token ring networks and the AnSI X3T9.5 standard for FDDI.
    • 一种用于使发射机能够确定在令牌保持定时器(THT)窗口内可以被丢弃的可变长度帧的数量的方法和装置。 最后一帧决策算法使得发射机能够将终止定界符中的中间帧位设置为正确的状态,以指示所发送的帧序列中的每个帧的状态。 使用先行技术来检查在THT时间窗口中可用的剩余发送时间,因此,在部分传输的无效帧上不浪费环带宽,有效地优化网络的吞吐量。 由于最后一帧决策算法中的关键变量是软件可编程的,所以算法与环速无关。 该算法计算发送的八位字节,而不是在决定是否发送附加帧时测量传输时间。 该算法可以应用于信号帧或多帧传输模式以及正常或早期令牌释放。 适用于令牌环网的IEEE 802.5局域网标准和FDDI的AnSI X3T9.5标准。
    • 10. 发明授权
    • Protocol for determining physical order of active stations on a token
ring
    • 用于确定令牌环上活动站的物理顺序的协议
    • US4507777A
    • 1985-03-26
    • US463470
    • 1983-02-03
    • Edwin L. TuckerRichard H. Waller, IIIKenneth T. Wilson
    • Edwin L. TuckerRichard H. Waller, IIIKenneth T. Wilson
    • H04L12/26H04L12/433H04J1/16H04J3/00H04J3/14
    • H04L12/2697H04L12/433H04L43/50
    • A reconfigurable serial loop or ring communication system is provided with a method and apparatus which enables stations on the loop to ascertain the address of its nearest active upstream neighbor (NAUN). A Ring Poll Frame is generated and broadcast from an originating station. The Ring Poll Frame includes a Ring Poll command, a From Address and a reset Address Recognized (AR) control bit. The first active downstream station recognizes the command with the control bit in the reset state, copies the contents of the ring poll frame and sets the bit. The set bit inhibits subsequent downstream stations from copying the frame. The first active station then generates a substantially similar formatted ring poll frame and passes it downstream. The process is continued by downstream active stations until the originating station receives a ring poll frame having a reset control bit. The reset control bit is an indication that all stations on the loop know the address of its NAUN.A ring management station may use the ring poll process to acquire information relative to the location of active stations on the ring.
    • 可重新配置的串行环路或环通信系统被提供有使得环路上的站可以确定其最近的主动上行邻居(NAUN)的地址的方法和装置。 生成环形轮询帧并从始发站广播。 环形轮询帧包括环形轮询命令,起始地址和复位地址识别(AR)控制位。 第一个活动下游站识别具有复位状态的控制位的命令,复制环轮询帧的内容并设置该位。 设置位禁止后续下游站复制帧。 然后,第一活动站产生大致相似的格式化的环形轮询框,并将其传送到下游。 该过程由下游主动站继续,直到发起站接收到具有复位控制位的环状轮询帧。 复位控制位表示环路上的所有站都知道其NAUN的地址。 环形管理站可以使用环形轮询过程来获取关于环上的活动站的位置的信息。