公开(公告)号：US20050073964A1

公开(公告)日：2005-04-07

申请号：US10897484

申请日：2004-07-23

申请人： Christopher Schmidt ,  Daniel Becker ,  Patrick Foy

发明人： Christopher Schmidt ,  Daniel Becker ,  Patrick Foy

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04M7/00 ,  H04L12/66

CPC分类号： H04L65/1069 ,  H04L29/06027 ,  H04L29/12292 ,  H04L61/2069 ,  H04L63/0428 ,  H04L63/08 ,  H04L65/1006 ,  H04L65/4046 ,  H04M7/006 ,  H04W8/26 ,  H04W76/10 ,  H04W80/00

摘要： A method and system for fast setup of group Voice over Internet Protocol (VoIP) communications. The method and system provide a lower VoIP signaling overhead and a faster setup-time of group calls such as N-way audio and/or audio-video conference calls. Multi-party VoIP connections are quickly set-up over one or more virtual communications channels established between plural network devices using a session layer application, one or more group transport layer ports and a broadcast destination network address.

摘要翻译： 一种用于快速建立群组语音互联网协议（VoIP）通信的方法和系统。 该方法和系统提供较低的VoIP信令开销和更快的组呼呼叫建立时间，例如N路音频和/或音频 - 视频电话会议。 多方VoIP连接在使用会话层应用，一个或多个组传输层端口和广播目的地网络地址的多个网络设备之间建立的一个或多个虚拟通信信道上快速建立。

公开(公告)号：US06333798B1

公开(公告)日：2001-12-25

申请号：US09781169

申请日：2001-02-13

申请人： Graham R. Allan ,  Gary Duerksen ,  Patrick Foy

发明人： Graham R. Allan ,  Gary Duerksen ,  Patrick Foy

IPC分类号： H04J1402

CPC分类号： H04J14/0283 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0216 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0279 ,  H04J14/0284

摘要： The present invention provides a bidirectional wavelength division multiplexed optical communication network useful in numerous network configurations. The network includes a bidirectional optical waveguide carrying counter-propagating wavelength division multiplexed optical signals each including plural channels. Several optical nodes are positioned along the bidirectional optical waveguide, each of which includes an optically-amplified bidirectional optical add-drop multiplexer. Each bidirectional optical add-drop multiplexer includes channel selectors for selecting at least one optical channel from each of the counter-propagating WDM optical signals. Each optical node further includes at least one optical transmitter for supplying an optical channel to be added by the bidirectional optical add-drop multiplexer to the bidirectional optical waveguide and at least one optical receiver for receiving an optical channel dropped from the bidirectional optical waveguide by the bidirectional add-drop multiplexer. Preferably, each optical node includes a bidirectional optical service channel transmitter and receiver and a network control element. Through measurement of optical launch powers and optical amplifier gain, the optical power levels of the optical channels are controlled to within a specified range. The bidirectional optical systems of the present invention can be used to create flexible network topologies that are easily expandable to include additional optical nodes and have particular application in metropolitan area networks.

摘要翻译： 本发明提供了一种在许多网络配置中有用的双向波分复用光通信网络。 网络包括携带反向传播波分复用光信号的双向光波导，每个光信号包括多个信道。 沿着双向光波导放置几个光学节点，每个光学节点包括光学放大的双向光分插复用器。 每个双向光分插复用器包括用于从每个反向传播的WDM光信号中选择至少一个光信道的信道选择器。 每个光节点还包括至少一个光发送器，用于将由双向光分插复用器添加的光信道提供给双向光波导，以及至少一个光接收器，用于接收从双向光波导掉落的光通道 双向分插复用器。 优选地，每个光节点包括双向光业务信道发射机和接收机以及网络控制元件。 通过光发射功率和光放大器增益的测量，光通道的光功率电平被控制在规定的范围内。 本发明的双向光学系统可以用于创建灵活的网络拓扑，其易于扩展以包括附加的光学节点并且在城域网中具有特定应用。