公开(公告)号：US07167690B2

公开(公告)日：2007-01-23

申请号：US09995467

申请日：2001-11-28

申请人： Matthew P. J. Baker ,  Deborah L. Raynes ,  Bernard Hunt

发明人： Matthew P. J. Baker ,  Deborah L. Raynes ,  Bernard Hunt

IPC分类号： H03C7/02 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04B7/061 ,  H04W52/20 ,  H04W52/24 ,  H04W52/42

摘要： A radio communication system comprises a communication channel between a transmitter (108) having a plurality of antennas (110) and a receiver (114) having at least one antenna (110). In such a system the communication channel comprises a plurality of paths (112) having a range of characteristics. Data for transmission is generated by one or more applications (102) and has one or more categories assigned to it, for example by the addition of tags by a tagging block (204) indicating its importance or other requirements. Depending on the assigned categories and the characteristics of the paths (112), the data is mapped to one or more of the transmitter's antennas (110) to select a suitable transmission path (112).

摘要翻译： 无线电通信系统包括具有多个天线（110）的发射机（108）和具有至少一个天线（110）的接收机（114）之间的通信信道。 在这种系统中，通信信道包括具有一系列特征的多个路径（112）。 用于传输的数据由一个或多个应用（102）产生，并且具有分配给它的一个或多个类别，例如通过标记块（204）添加指示其重要性或其他要求的标签。 根据所分配的类别和路径（112）的特性，将数据映射到发射机的天线（110）中的一个或多个天线，以选择合适的传输路径（112）。

公开(公告)号：US06714611B1

公开(公告)日：2004-03-30

申请号：US09527278

申请日：2000-03-17

申请人： Yonggang Du ,  Matthew P. J. Baker ,  Edward S. Eilley

发明人： Yonggang Du ,  Matthew P. J. Baker ,  Edward S. Eilley

IPC分类号： H04L702

CPC分类号： H04W56/0035 ,  H04W92/10

摘要： The invention relates to a wireless network which includes a plurality of network nodes, each of which includes a radio device with a respective radio clock supply and is arranged to exchange data via a wireless medium, and also includes a user interface for the exchange of data between the associated radio device and at least one user. At least one user of a network node receives a user clock, being independent of the radio clock, from a user clock supply of the relevant network node. Each network node is arranged to determine, in response to events specified by a central network node, a time value related to the relevant application clock. The central network node transmits at least the last time value formed by a selected network node. Each network node forms the difference between the last two time values determined and synchronizes the frequency of its user clock supply in dependence on the comparison of the difference between its last two time values determined with the difference between the last two time values of the selected network node.

摘要翻译： 本发明涉及一种无线网络，其包括多个网络节点，每个网络节点包括具有相应无线电时钟供应的无线电设备，并且被布置为经由无线介质交换数据，并且还包括用于交换数据的用户接口 在相关联的无线电设备和至少一个用户之间。 网络节点的至少一个用户从相关网络节点的用户时钟供应接收独立于无线电时钟的用户时钟。 每个网络节点被布置成响应于由中央网络节点指定的事件来确定与相关应用时钟相关的时间值。 中央网络节点至少发送由所选网络节点形成的最后时间值。 每个网络节点形成所确定的最后两个时间值之间的差异，并且根据其所选择的网络的最后两个时间值之间的差确定的其最后两个时间值之间的差异的比较来同步其用户时钟供应的频率 节点。

公开(公告)号：US06661811B1

公开(公告)日：2003-12-09

申请号：US09488031

申请日：2000-01-20

申请人： Matthew P. J. Baker

发明人： Matthew P. J. Baker

IPC分类号： H04J306

CPC分类号： H04L12/40058 ,  H04J3/0632 ,  H04J3/0664 ,  H04L12/40071 ,  H04L2012/5616 ,  H04L2012/5649 ,  H04L2012/5664 ,  H04N21/4305 ,  H04N21/43632 ,  H04Q11/0478

摘要： In order to enable isochronous data to be transmitted over communications systems which may introduce timing jitter each packet of isochronous data is provided with a timestamp which indicates to a receiver the time at which a packet should be processed. The receiver notes the time the first packet of a data stream arrive and adds a given offset time which is greater than or equal to the maximum jitter to produce a time t1. Each succeeding packet is processed at a time t=t1+(Tn−T1), where T1 is the timestamp in the first data packet and Tn is the timestamp in the current packet. Thus the processing at the receiver is dependent on the relative times of arrival of the packets rather than the absolute times defined by the timestamps.