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1. 发明授权

US06781978B1 Method for transmitting collision-free messages in a communication system and apparatus therefor 失效
标题翻译：用于在通信系统中发送无冲突消息的方法及其装置
公开(公告)号：US06781978B1
公开(公告)日：2004-08-24
申请号：US09285849
申请日：1999-04-05
申请人： Hai Xie , Thomas Casey Hill , Jheroen Pieter Dorenbosch
发明人： Hai Xie , Thomas Casey Hill , Jheroen Pieter Dorenbosch
IPC分类号： H04Q724
CPC分类号： H04W28/06 , H04W4/12 , H04W24/00 , H04W72/0446
摘要： A plurality of wireless transceivers (114) for communicating messages to SCRs (Selective Call Radios) (116) include a radio transceiver (402, 404, 406, 408), and a processing system (412) coupled thereto. A periodic communication cycle (FIG. 9) is divided into a plurality of time slots, each time slot having a duration equal to or greater than the predetermined propagation delay of a signal transmitted between wireless transceivers. Each of the wireless transceivers is assigned to a corresponding one of the time slots. To transmit a message from a selected one of the wireless transceivers to a targeted SCR, the processing system of each of the wireless transceivers is adapted to locate the targeted SCR. Once the targeted SCR is located, the processing system of the wireless transceiver co-located with the targeted SCR is adapted to enable the radio transceiver to monitor transmission energy in the communication medium during a time slot immediately preceding the time slot assigned to said wireless transceiver. If the energy measured is below a predetermined threshold, the processor is adapted to cause the radio transceiver to transmit at least a portion of the message to the targeted transceiver beginning at the time slot assigned to said wireless transceiver.
摘要翻译：用于向SCR（选择性呼叫无线电）（116）传送消息的多个无线收发机（114）包括无线电收发机（402,404,406,408）和耦合到其的处理系统（412）。周期性通信周期（图9）被划分为多个时隙，每个时隙具有等于或大于在无线收发器之间传输的信号的预定传播延迟的持续时间。每个无线收发器被分配给相应的一个时隙。为了将消息从所选择的一个无线收发器发送到目标SCR，每个无线收发器的处理系统适于定位目标SCR。一旦目标SCR被定位，与目标SCR共处的无线收发器的处理系统适于使得无线电收发器能够在分配给所述无线收发器的时隙之前的时隙期间监视通信介质中的传输能量。如果测量的能量低于预定阈值，则处理器适于使无线电收发器从分配给所述无线收发器的时隙开始将消息的至少一部分传送到目标收发器。

2. 发明授权

US5684791A Data link control protocols for wireless ATM access channels 失效
标题翻译：用于无线ATM接入信道的数据链路控制协议
公开(公告)号：US5684791A
公开(公告)日：1997-11-04
申请号：US553168
申请日：1995-11-07
申请人： Dipankar Raychaudhuri , Hai Xie , Ruixi Yuan
发明人： Dipankar Raychaudhuri , Hai Xie , Ruixi Yuan
IPC分类号： H04L1/00 , H04L1/16 , H04L1/18 , H04L12/56 , H04Q11/04 , H04B7/212
CPC分类号： H04L1/1838 , H04L1/0085 , H04L1/1614 , H04L1/1809 , H04L1/1874 , H04L1/1887 , H04Q11/0478 , H04L1/188 , H04L2012/5607 , H04L2012/5615 , H04L2012/5616 , H04L2012/5647
摘要： A data link control procedure for wireless ATM access channels based on a dynamic TDMA/TDD framework provides integrated ATM services including available bit-rate (ABR) data and constant/variable bit-rate (CBR/VBR) voice or video through the addition of wireless-specific medium access control and data link control protocol layers between the physical and ATM network layers. Generally, a data link control is used to insulate the ATM network layer from wireless channel impairments by selective retransmission of erroneous or lost cells before they are released to the ATM layer. The data link control methods disclosed use the on-demand ABR burst transmission capability of the dynamic TDMA channel to retransmit unacknowledged cells in available slots not allocated to service data. Specific error recovery procedures for both (asynchronous) ABR and (isochronous) CBR services are provided.
摘要翻译：基于动态TDMA / TDD框架的无线ATM接入信道的数据链路控制程序提供综合ATM服务，包括可用的比特率（ABR）数据和恒定/可变比特率（CBR / VBR）语音或视频，通过添加物理和ATM网络层之间的无线特定媒体访问控制和数据链路控制协议层。通常，数据链路控制用于通过在将错误或丢失的小区释放到ATM层之前选择性地重传错误或丢失的小区来将ATM网络层与无线信道损伤隔离。所公开的数据链路控制方法使用动态TDMA信道的按需ABR突发传输能力在未分配给服务数据的可用时隙中重传未确认小区。提供了（异步）ABR和（同步）CBR服务的特定错误恢复过程。

3. 发明授权

US5638371A Multiservices medium access control protocol for wireless ATM system 失效
标题翻译：用于无线ATM系统的多业务媒体接入控制协议
公开(公告)号：US5638371A
公开(公告)日：1997-06-10
申请号：US495164
申请日：1995-06-27
申请人： Dipankar Raychaudhuri , Hai Xie , Ruixi Yuan
发明人： Dipankar Raychaudhuri , Hai Xie , Ruixi Yuan
IPC分类号： H04J3/00 , H04L1/16 , H04L1/18 , H04L12/28 , H04L12/56 , H04Q11/04 , H04W12/10 , H04W72/12 , H04J3/16
CPC分类号： H04W72/1252 , H04L1/1854 , H04Q11/0478 , H04L1/16 , H04L2012/5607 , H04L2012/5616 , H04L2012/563 , H04L2012/5632 , H04L2012/564 , H04L2012/5645 , H04L2012/5652 , H04W12/10
摘要： A medium access control (MAC) layer protocol is used in a wireless ATM system for integrated support of ATM services, including constant bit-rate (CBR), variable bit-rate (VBR) and available bit-rate (ABR) services. The MAC protocol supports both connectionless packet and connection-oriented virtual circuit modes, with appropriate service parameter and quality-of-services selection. A dynamic time division, multiple access/time division multiplex (TDMA/TDM) approach accommodates the service classes in an integrated manner. A supervisory MAC procedure integrates ATM ABR/VBR/CBR virtual circuits, providing burst-by-burst allocation of ABR cells and call-by-call allocation of VBR and CBR bandwidth parameters. A mechanism is provided for the dynamic allocation of subframe capacities, assignment of ABR slots based on desired queueing rules, assignment of VBR slots based on ATM traffic shaper parameters and assignment of CBR slots based on bandwidth requirements.
摘要翻译：在无线ATM系统中使用媒体接入控制（MAC）层协议来综合支持ATM业务，包括恒定比特率（CBR），可变比特率（VBR）和可用比特率（ABR）业务。 MAC协议支持无连接分组和面向连接的虚拟电路模式，具有适当的服务参数和服务质量选择。动态时分，多址/时分复用（TDMA / TDM）方式以集成方式适应服务类。监控MAC过程集成ATM ABR / VBR / CBR虚拟电路，提供ABR单元的突发分配和VBR和CBR带宽参数的逐个呼叫分配。提供了用于子帧容量的动态分配的机制，基于期望的排队规则分配ABR时隙，基于ATM流量整形器参数分配VBR时隙，并且基于带宽需求分配CBR时隙。

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