公开(公告)号：US4589131A

公开(公告)日：1986-05-13

申请号：US421883

申请日：1982-09-23

申请人： Stephan Horvath ,  Yung-Shain Wu

发明人： Stephan Horvath ,  Yung-Shain Wu

IPC分类号： G10L15/08 ,  G10L19/06 ,  G10L9/14

CPC分类号： G10L25/93 ,  G10L19/06

摘要： Speech signal is decided voiced or unvoiced by a sequence of unilateral decisions: a first test decides "unvoiced" if standardized energy E.sub.s is below a threshold, or "ambiguous" if above the threshold whereby a second test decides "unvoiced" if the number of zero crossings ZC is above a threshold, and ambiguous if below the threshold. Up to six criteria may be so tested as ambiguous before a "voiced" decision is made.

摘要翻译： 通过单方面决定的顺序决定语音信号的声音或清音：如果标准化能量Es低于阈值，则第一测试决定“无声”，如果高于阈值，则第二测试决定“无声”，如果第二测试的数量 过零点ZC高于阈值，并且如果低于阈值则模糊。 在做出“有声”决定之前，最多六个标准可能会被视为含糊不清。

公开(公告)号：US5907542A

公开(公告)日：1999-05-25

申请号：US632101

申请日：1996-04-15

申请人： Thomas Kuehnel ,  Yung-Shain Wu

发明人： Thomas Kuehnel ,  Yung-Shain Wu

IPC分类号： H04L12/56 ,  H04Q11/04 ,  H04W36/08 ,  H04W76/04 ,  H04Q7/00

CPC分类号： H04W36/08 ,  H04Q11/0478 ,  H04L2012/5607 ,  H04L2012/563 ,  H04W60/00 ,  H04W72/04 ,  H04W76/04

摘要： A wireless communication system for asynchronous transfer mode includes the dynamic assignment of signalling virtual channels and/or virtual paths for communications between a mobile terminal and a controller or control function. An access point associated with the wireless mobile terminal is transparent for transmitted data and control information. The dynamic assignment of the signalling virtual channel (SVC) takes place in the event of new registration to the system and handover from one access point to another. The protocol uses finite state machines and timers at the mobile terminal and at the control function. For new registrations, an assignment channel is used on a broadcast uplink from the mobile terminal to the control function to request the SVC, while the response from the control function is transmitted on the downlink broadcast channel. The response contains the unique SVCI to be used by the mobile terminal and the control function for further signalling between them. A loss of carrier connection is detected by exchanging alive messages. If there is no response to the alive messages, pending connections are released and assigned SVCs are freed. Handover from one access point to another is initiated by the mobile terminal. A new SVCI is assigned by the control function as part of the messages exchanged during the handover protocol.

摘要翻译： 用于异步传输模式的无线通信系统包括信令虚拟信道的动态分配和/或用于移动终端与控制器或控制功能之间的通信的虚拟路径。 与无线移动终端相关联的接入点对于发送的数据和控制信息是透明的。 信令虚拟信道（SVC）的动态分配发生在对系统的新注册和从一个接入点切换到另一个接入点的情况下。 该协议在移动终端和控制功能下使用有限状态机和定时器。 对于新的注册，在从移动终端到控制功能的广播上行链路上使用分配信道来请求SVC，而来自控制功能的响应在下行链路广播信道上被发送。 该响应包含要由移动终端使用的唯一SVCI以及它们之间进一步信令的控制功能。 通过交换活动消息来检测到运营商连接的丢失。 如果对活动消息没有响应，则释放挂起的连接并分配SVC。 由移动终端发起从一个接入点到另一接入点的切换。 新的SVCI由控制功能分配为在切换协议期间交换的消息的一部分。

公开(公告)号：US5787077A

公开(公告)日：1998-07-28

申请号：US658231

申请日：1996-06-04

申请人： Thomas Kuehnel ,  Yung-Shain Wu

发明人： Thomas Kuehnel ,  Yung-Shain Wu

IPC分类号： H04L12/56 ,  H04Q11/04 ,  H04L12/66

CPC分类号： H04Q11/0478 ,  H04L2012/5607

摘要： A wireless communication system for asynchronous transfer mode includes the dynamic mapping of ATM cells on a wireless ATM link into a unique Virtual Path on a wired ATM link, and in the reverse direction as well. The access point includes a radio medium access controller which assigns a unique radio connection identifier RCI to the wireless link established between the access point and a mobile terminal. The Virtual Path identifier (VPI) used on the fixed link is selected based on the RCI assigned by the access point. The radio connection identifier RCI remains unchanged as long as the mobile terminal is associated with that access point. ATM cells sent from the control function include the VPI and are mapped by the access point into the connection referenced by the RCI. ATM cells from the mobile terminal are received on a particular connection. According to the connection identifier (RCI) cells are mapped by the access point into a particular Virtual Path, which corresponds to the RCI.

摘要翻译： 用于异步传输模式的无线通信系统包括将ATM信元在无线ATM链路上的动态映射转换为有线ATM链路上的唯一虚拟路径，以及相反的方向。 接入点包括无线电介质访问控制器，其向建立在接入点和移动终端之间的无线链路分配唯一的无线电连接标识符RCI。 基于由接入点分配的RCI选择在固定链路上使用的虚拟路径标识符（VPI）。 只要移动终端与该接入点相关联，无线电连接标识符RCI保持不变。 从控制功能发送的ATM信元包括VPI，并由接入点映射到由RCI引用的连接。 在特定连接上接收来自移动终端的ATM信元。 根据连接标识符（RCI），小区被接入点映射到与RCI相对应的特定虚拟路径中。