Multi-frame stripping protocol for token ring networks
    1.
    发明授权
    Multi-frame stripping protocol for token ring networks 失效
    多功能吊环网络协议

    公开(公告)号:US5142530A

    公开(公告)日:1992-08-25

    申请号:US422168

    申请日:1989-10-16

    IPC分类号: H04L12/433

    CPC分类号: H04L12/433

    摘要: A multi-frame stripping method for use in a token ring network utilizing early token release with multiple frames transmitted by multiple stations circulating around the ring. The method recovers the ring with minimum loss of data after detection of an error condition resulting in frame corruption. The transmitting station is responsible for removing its own frames from the ring. With one or more of its frames corrupted, a station terminates frame removal after the transmitter has finished transmitting when a frame is received from another station without code violation errors in the frame header if the frame counter has returned to its initial value. The station terminates stripping when only a single frame is transmitted and then becomes corrupted if an isolated ending delimiter is detected at the station. The station also terminates stripping in the multi-frame case when the ending delimiter of the last frame transmitted by the source station is received without code violation error in the I-bit, if each preceding ending delimiter is correctly detected regardless of data corruption occurring in any frame header. The method is applicable to the IEEE 802.5 and ANSI X3T9.5 (FDDI) standards.

    Token ring speed detector
    2.
    发明授权
    Token ring speed detector 失效
    令牌环速度检测器

    公开(公告)号:US5442629A

    公开(公告)日:1995-08-15

    申请号:US200989

    申请日:1994-02-24

    IPC分类号: H04L12/433 H04L29/06 H04J3/22

    摘要: Dual detection paths containing speed recognition devices automatically determine the rate at which data is being transmitted on a multi-rate digital data communications network such as a token ring network. The multiple detection paths operate simultaneously with each detection path provided with a Phase Lock Loop (PLL) and a pattern recognition device. The PLL and its associated pattern recognition device are made to operate at one of the known ring speeds. The ring speed is determined by the detection path which is able to recognize a predetermined data pattern from the network.

    摘要翻译: 包含速度识别装置的双重检测路径自动确定在诸如令牌环网络的多速率数字数据通信网络上传输数据的速率。 多个检测路径与设置有锁相环(PLL)和模式识别装置的每个检测路径同时操作。 PLL及其相关联的模式识别装置被制造成以已知的环速度之一工作。 环速由能够从网络识别预定数据模式的检测路径确定。

    Multiple group address recognition
    5.
    发明授权
    Multiple group address recognition 失效
    多组地址识别

    公开(公告)号:US5537623A

    公开(公告)日:1996-07-16

    申请号:US24593

    申请日:1993-03-01

    IPC分类号: G06F13/00 H04L29/06 G06F12/00

    CPC分类号: H04L29/06 H04L45/7453

    摘要: A network interface card for attaching computers, work stations or the like to a Local Area Network (LAN) includes a device which indicates an address compare if selected bits in a first part of an address, in the address field of a received frame, matches bits stored in the network interface card and at least one bit of a code word stored at a particular address of an index RAM is set to a predetermined state. The particular address in the index RAM is identified by a second part of the address in the received frame. The range of address which can be recognized is further extended by a contents addressable memory (CAM) coupled to the device. The CAM makes a parallel compare between an input address and its contents and outputs a match signal if a match is found. A programmable control register is used to activate or deactivate the CAM or the device.

    摘要翻译: 用于将计算机,工作站等附接到局域网(LAN)的网络接口卡包括指示地址比较的设备,如果接收帧的地址字段中的地址的第一部分中的选定位匹配 存储在网络接口卡中的位和存储在索引RAM的特定地址的代码字的至少一个位被设置为预定状态。 索引RAM中的特定地址由接收帧中地址的第二部分标识。 通过耦合到该设备的内容可寻址存储器(CAM)进一步扩展可识别的地址范围。 CAM在输入地址及其内容之间进行并行比较,如果发现匹配,则输出匹配信号。 可编程控制寄存器用于激活或停用CAM或设备。

    Multi-frame transmission control for token ring networks
    6.
    发明授权
    Multi-frame transmission control for token ring networks 失效
    令牌环网络的多帧传输控制

    公开(公告)号:US4964113A

    公开(公告)日:1990-10-16

    申请号:US424850

    申请日:1989-10-20

    IPC分类号: H04L12/433

    CPC分类号: H04L12/433

    摘要: 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.

    摘要翻译: 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。

    Fast communication link bit error rate estimator
    8.
    发明授权
    Fast communication link bit error rate estimator 失效
    快速通信链路误码率估计器

    公开(公告)号:US5418789A

    公开(公告)日:1995-05-23

    申请号:US960971

    申请日:1992-10-14

    IPC分类号: H04L1/20 G06F11/00 H04B17/00

    CPC分类号: H04L1/20

    摘要: A system and method is provided for estimating the bit error rate of a data signal which has been reconstructed from a received data signal. The system comprises (i) logic for determining timing degradation and amplitude degradation of the received data signal; (ii) an actual bit error rate calculator for calculating the actual bit error rate of the reconstructed data signal; (iii) an instantaneous bit error rate calculator for estimating a bit error rate of the reconstructed signal using the timing degradation and the amplitude degradation; (iv) a first integrator for integrating the estimated bit error rate; (v) a comparator for comparing the integrated estimated bit error rate with the actual bit error rate and outputting an error signal which modifies the estimated bit error rate; and (vi) a second integrator for integrating the estimated bit error rate. The time constant associated with the second integrator is shorter than the time constant associated with the first integrator.

    摘要翻译: 提供了一种系统和方法,用于估计从接收的数据信号重构的数据信号的误码率。 该系统包括(i)用于确定接收数据信号的定时劣化和幅度劣化的逻辑; (ii)实际误码率计算器,用于计算重构数据信号的实际误码率; (iii)瞬时误码率计算器,用于使用定时劣化和幅度劣化来估计重构信号的误码率; (iv)用于对估计的误码率进行积分的第一积分器; (v)比较器,用于将积分估计误码率与实际误码率进行比较,并输出修改估计误码率的误差信号; 和(vi)用于对估计的误码率进行积分的第二积分器。 与第二积分器相关联的时间常数小于与第一积分器相关联的时间常数。

    Safety apparatus and method for vehicular impact
    9.
    发明授权
    Safety apparatus and method for vehicular impact 失效
    车辆撞击的安全装置和方法

    公开(公告)号:US4474257A

    公开(公告)日:1984-10-02

    申请号:US417178

    申请日:1982-09-10

    申请人: Joseph K. Lee

    发明人: Joseph K. Lee

    摘要: This invention is a method and apparatus for detecting the impending impact of a moving vehicle with another object whether the moving vehicle is approaching, or being approached by the vehicle containing the apparatus for such detection. It is further characterized by the placement of impact air bags between the body and the forward or rearward bumper of the vehicle and by an apparatus and method for partially filling such air bags so as to prepare such vehicle for impact with another object or vehicle. The actual impact between the vehicle and said other object further rapidly fills the air bag to its fullest capacity in order to allow the minimal damage to the two vehicles and the passengers therewithin.

    摘要翻译: 本发明是一种用于检测移动车辆与另一物体即将到来的碰撞的方法和装置,无论移动车辆是否正在接近,或者是由包含用于这种检测的装置的车辆接近。 其特征还在于,冲击气囊位于车体前部或后部保险杠之间,并且用于部分地填充这种气囊的装置和方法,以便制备这种车辆以与另一物体或车辆冲击。 车辆和所述另一物体之间的实际影响进一步迅速地将气囊充满最大容量,以便对两辆车辆和其中的乘客造成最小的损坏。

    Air bag system for automobiles
    10.
    发明授权
    Air bag system for automobiles 失效
    汽车气囊系统

    公开(公告)号:US4258931A

    公开(公告)日:1981-03-31

    申请号:US859729

    申请日:1978-08-17

    摘要: An air bag system to protect occupants of automobiles against injury in case of collision. An air bag is housed, when empty, in a tapered open container in the passenger compartment of the car. It is inflated by compressed air from an air tank in the vehicle. Inflation is controlled by solenoid valves actuated by switches responsive to excessive brake pedal pressure, harness tension, or force against the front bumper. The speed of inflation may vary. A manual switch controls a deflation pump which deflates the bag and also mechanically draws it back into its container. Normal repeated use of the brake pedal operates air pumping means to keep up the pressure in the air tank.

    摘要翻译: 一种气囊系统,用于在发生碰撞时保护汽车乘客免受伤害。 一个空气袋在空的时候被安放在汽车的乘客舱内的锥形敞开的容器中。 它被来自车辆中的空气罐的压缩空气充气。 通过响应于过大的制动踏板压力,线束张力或抵抗前保险杠的力量由开关致动的电磁阀来控制充气。 通货膨胀的速度可能会有所不同。 一个手动开关控制一个放气袋,放气袋并将其机械地拉回到容器中。 正常重复使用制动踏板操作空气泵送装置以保持空气罐中的压力。