Clock recovery method and apparatus for constant bit rate (CBR) traffic
    1.
    发明申请
    Clock recovery method and apparatus for constant bit rate (CBR) traffic 审中-公开
    用于恒定比特率(CBR)业务的时钟恢复方法和装置

    公开(公告)号:US20070014296A1

    公开(公告)日:2007-01-18

    申请号:US11487461

    申请日:2006-07-17

    IPC分类号: H04L12/56 H04L12/28

    CPC分类号: H04L49/40 H04L2012/5674

    摘要: Disclosed is a clock recovery method and apparatus for CBR traffic in the packet switching network so as to recover the clock of the CBR traffic upon transmission by inserting a small amount of random packets to the CBR traffic stream which has arrived in a receiver. According to the present inventive concept, the CBR streams are added with the random traffic streams in the packet switching network, so that the clock of the CBR streams upon transmission can be recovered, and jitter and wander according to clock recovery can be reduced.

    摘要翻译: 公开了一种用于分组交换网络中的CBR业务的时钟恢复方法和装置,以便通过将少量的随机分组插入已经到达接收机的CBR业务流来恢复传输时的CBR业务的时钟。 根据本发明构思,CBR流在分组交换网络中与随机流量流相加,从而可以恢复传输时的CBR流的时钟,并且可以减少根据时钟恢复的抖动和漂移。

    Method of and apparatus for transmitting universal plug and play audio/video stream
    2.
    发明申请
    Method of and apparatus for transmitting universal plug and play audio/video stream 有权
    用于发送通用即插即用音频/视频流的方法和装置

    公开(公告)号:US20070174478A1

    公开(公告)日:2007-07-26

    申请号:US11487466

    申请日:2006-07-17

    IPC分类号: G06F15/16

    CPC分类号: H04L65/4076

    摘要: A method of and an apparatus for transmitting a universal plug and play audio/video (UPnP-AV) stream is disclosed, which transmits a media stream from a media server to an media renderer, using an integrated protocol which combines an universal plug and play (UPNP) audio/video (AV) protocol and a residential Ethernet (ResE) subscription protocol. According to the method, an integrated protocol combining an UPnP-AV protocol and an Ethernet protocol can be used. Additionally, a secured quality of service (QoS) can be provided for the UPnP-AV stream.

    摘要翻译: 公开了一种用于发送通用即插即用音频/视频(UPnP-AV)流的方法和装置,其使用综合协议将媒体流从媒体服务器发送到媒体渲染器,该协议组合了通用即插即用 (UPNP)音频/视频(AV)协议和住宅以太网(ResE)订阅协议。 根据该方法,可以使用组合UPnP-AV协议和以太网协议的集成协议。 另外,可以为UPnP-AV流提供安全的服务质量(QoS)。

    Time synchronizing method and apparatus based on time stamp
    3.
    发明申请
    Time synchronizing method and apparatus based on time stamp 有权
    基于时间戳的时间同步方法和装置

    公开(公告)号:US20070025481A1

    公开(公告)日:2007-02-01

    申请号:US11487408

    申请日:2006-07-17

    IPC分类号: H04L7/00

    CPC分类号: H04J3/0667 H04L12/2803

    摘要: Provided are a time synchronizing method and apparatus based on a time stamp. The time synchronizing method includes: transmitting a local time stamp based on a free-running local clock to a master node; receiving a response time stamp from the master node; calculating a delta time value based on the response time stamp; filtering the delta-time using a digital low pass filter running at the free-running local clock rate; and adjusting a local clock time based on the filtered delta time value.

    摘要翻译: 提供了一种基于时间戳的时间同步方法和装置。 时间同步方法包括:基于自由运行的本地时钟向主节点发送本地时间戳; 从主节点接收响应时间戳; 基于响应时间戳计算增量时间值; 使用以自由运行的本地时钟速率运行的数字低通滤波器来过滤增量时间; 以及基于滤波的增量时间值来调整本地时钟时间。

    Method and apparatus for constant bit rate data transmission in an optical burst switching network
    6.
    发明申请
    Method and apparatus for constant bit rate data transmission in an optical burst switching network 有权
    在光突发交换网络中用于恒定比特率数据传输的方法和装置

    公开(公告)号:US20060159130A1

    公开(公告)日:2006-07-20

    申请号:US11333343

    申请日:2006-01-18

    IPC分类号: H04J3/06

    摘要: A method, core node, ingress edge node, and egress edge node for matching a bit rate of data input into an optical burst switching network with that of data output from the optical burst switching network are provided. The method includes calculating a difference between a frequency of optical data received on a node and a natural frequency of the node; including the calculated difference into control information; and transmitting the control information. The core node includes a calculator to calculate a difference between frequency of optical data and the natural frequency of the optical data; and a controller to add the difference and a difference included in control information, and output the added difference. The ingress edge node includes a data processor; and a controller. The egress edge node includes an ingress edge node clock recovery phase lock loop; a de-mapper; and a storage unit.

    摘要翻译: 提供了一种方法,核心节点,入口边缘节点和出口边缘节点,用于将输入到光突发交换网络的数据的比特率与从光突发交换网络输出的数据的比特率相匹配。 该方法包括计算在节点上接收的光数据的频率与节点的固有频率之间的差; 包括计算出的与控制信息的差异; 并发送控制信息。 核心节点包括计算器,用于计算光学数据的频率与光学数据的固有频率之间的差异; 以及控制器,用于添加差异和包含在控制信息中的差异,并输出添加的差异。 入口边缘节点包括数据处理器; 和控制器。 出口边缘节点包括入口边缘节点时钟恢复锁相环; 一个去映射器 和存储单元。