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    • 5. 发明授权
    • Adaptive random access protocol and dynamic search tree expansion
resolution for multiple station networks
    • 多站点网络的自适应随机接入协议和动态搜索树扩展解析
    • US6034967A
    • 2000-03-07
    • US777216
    • 1996-12-27
    • Richard W. CittaJingsong Xia
    • Richard W. CittaJingsong Xia
    • H04B3/38H04H60/97H04J3/16H04M7/00H04M11/00H04N7/173H04N21/239H04N21/61H04J3/00
    • H04H60/97H04B3/38H04J3/1694H04L12/2801H04M11/00H04M7/006H04N21/2393H04N21/6118H04N21/6168H04N7/17327
    • A communication system has a plurality of stations which communicate data in a data frame having a plurality of slots, wherein the plurality of slots are new message minislots NMS, expansion minislots EMS, and data slots DS. A master station determines a range parameter R which is based upon a number of slave stations transmitting reservation requests in a data frame. The master station also determines a parameter MAP according to a number of reservation requests in a queue waiting to be processed by the master station. The parameter MAP defines the new message minislots, the expansion minislots, and the data slots in an upstream data frame. The master station transmits the range parameter R and the parameter MAP to a plurality of slave stations. Each slave station independently determines a random transmission parameter RN. Each slave station transmits to the master station (i) a new reservation request in a new message minislot if its random transmission parameter RN corresponds to the parameter MAP, (ii) an old reservation request in an expansion minislot if assigned an expansion minislot in the parameter MAP, and (iii) data in a data slot if assigned a data slot by the master station.
    • 通信系统具有在具有多个时隙的数据帧中传送数据的多个站,其中,多个时隙是新的消息小时隙NMS,扩展小时隙EMS和数据时隙DS。 主站确定基于在数据帧中发送预留请求的从站数量的范围参数R。 主站还根据等待主站处理的队列中的预约请求数量来确定参数MAP。 参数MAP定义上游数据帧中的新消息微时隙,扩展小时隙和数据时隙。 主站将范围参数R和参数MAP发送到多个从站。 每个从站独立地确定随机传输参数RN。 如果其随机传输参数RN对应于参数MAP,则每个从站向主站(i)新消息微时隙中的新的预留请求发送(ii)如果在扩展小时隙中分配了扩展小时隙 参数MAP,以及(iii)由主站分配数据时隙的数据时隙中的数据。
    • 6. 发明授权
    • Time-sharing subscriber communications system
    • 时间共享订户通信系统
    • US3647976A
    • 1972-03-07
    • US3647976D
    • 1970-03-09
    • MINNESOTA MINING & MFG
    • MOSES DONALD W
    • H04M11/00H04B3/38H04B14/02H04J3/00H04J3/08H04J3/16H04L5/22H04M9/02H04N7/10H04N7/16H04Q11/04H04J7/00
    • H04J3/00H04B3/38H04B14/02H04J3/08H04J3/1676H04M9/022H04N7/10H04N7/16
    • A time-sharing subscriber communications system wherein a timedivision multiplexed signal having a series of frames and a predetermined number of time slots in each frame is transmitted in a given frequency band over a single wideband circuit to a plurality of subscriber terminals. Various time slots contain information from various input channels which are respectively related to various ones of the subscriber terminals. The transmitted signal is modulated by a zero axis crossing modulation scheme wherein each time slot is defined by the interval between successive zero axis crossings and the information contained in each time slot is defined by the duration of the time slot. At each subscriber terminal the information related to that channel is tapped off from the signal received from the transmitter terminal, a portion of the received signal is retransmitted over the wideband circuit and new information related to the subscriber terminal is newly transmitted in one or more time slots of each frame of the timedivision multiplexed signal. A receiver terminal, interfaced to the opposite end of the wideband circuit from the transmitter terminal, demodulates the newly transmitted information from the subscriber terminal and provides output signals to various output channels respectively related to various ones of the subscriber terminals.
    • 一种分时用户通信系统,其中具有一系列帧和每帧中预定数量的时隙的时分多路复用信号在给定频带上通过单个宽带电路发送到多个用户终端。 各种时隙包含来自各种输入通道的信息,这些信息分别与各种用户终端相关。 发射信号由零轴交叉调制方案调制,其中每个时隙由连续的零轴交叉之间的间隔定义,并且每个时隙中包含的信息由时隙的持续时间定义。 在每个用户终端,与从该信道相关的信息与从发射机终端接收到的信号进行分接,通过宽带电路重发接收信号的一部分,并且在一个或多个时间内重新发送与用户终端相关的新信息 时分复用信号的每帧的时隙。 接收机终端,与发射机终端的宽带电路的相对端相连,对来自用户终端的新传送的信息进行解调,并将输出信号提供给与各种用户终端分别相关的各种输出信道。