公开(公告)号：US5475681A

公开(公告)日：1995-12-12

申请号：US166194

申请日：1994-01-31

申请人： Richard E. White ,  Thomas A. Freeburg ,  James J. Berken ,  Roy T. Ogasawara ,  James E. Mitzlaff ,  Gregory J. Bedlek

发明人： Richard E. White ,  Thomas A. Freeburg ,  James J. Berken ,  Roy T. Ogasawara ,  James E. Mitzlaff ,  Gregory J. Bedlek

IPC分类号： G06F13/42 ,  H04B1/16 ,  H04B1/38 ,  H04L12/56 ,  H04L12/64 ,  H04M1/73 ,  H04W92/02 ,  H04B7/15 ,  H04L12/403

CPC分类号： H04W92/02 ,  G06F13/423 ,  H04B1/1615 ,  H04B1/38 ,  H04L12/56 ,  H04L12/64 ,  H04L12/6402 ,  H04W52/0245

摘要： An improved network interface architecture for a packet switch provides a mechanism for handling voice and data packets. Bandwidth allocation can be changed because control and data memories are synchronized to one another. A hierarchical addressing technique is employed to enhance flexibility in handling packet information. This method permits packet message data and certain packet control data to be stored in memory locations without having to be duplicated at a different memory location prior to transmission of the packet. In an exemplary wireless TDMA packet network a control module (CM) sends a time stamp relative to the beginning of its frame in a synchronization packet allowing each of a plurality of user modules (UM) to maintain synchronization relative to the CM. The CM uses a plurality of directional antennas and transmits the synchronization packets over each antenna over a predetermined number of frames. The UMs use a receive time stamp to identify the beginning of a received synchronization packet. The difference between the time stamps combined with a delay constant is used by the UMs to adjust time synchronization to the CM frame. Packets are communicated between the controller and the peripherals at the UM and CM over a bus using a communication protocol which increases the efficiencies of packet communications by allowing additional direct command lines between the communications controller and peripherals.

摘要翻译： 用于分组交换机的改进的网络接口架构提供了用于处理语音和数据分组的机制。 可以改变带宽分配，因为控制和数据存储器彼此同步。 采用分层寻址技术来提高处理分组信息的灵活性。 该方法允许分组消息数据和某些分组控制数据存储在存储器位置中，而不必在传输分组之前在不同的存储器位置被复制。 在示例性无线TDMA分组网络中，控制模块（CM）在同步分组中相对于其帧的开始发送时间戳，允许多个用户模块（UM）中的每一个相对于CM保持同步。 CM使用多个定向天线，并在预定数量的帧上通过每个天线发送同步分组。 UM使用接收时间戳来识别接收到的同步分组的开始。 时间戳与延迟常数之间的差异由UM用于调整与CM帧的时间同步。 通过使用通信协议的通信协议，在UM和CM之间的控制器和外设之间通过总线传送数据包，通过允许通信控制器和外围设备之间的附加直接命令行来提高数据包通信的效率。