公开(公告)号：US07801260B2

公开(公告)日：2010-09-21

申请号：US10480114

申请日：2002-06-13

申请人： Yonggang Du ,  Li Sun

发明人： Yonggang Du ,  Li Sun

IPC分类号： H04L7/06 ,  H04L27/06 ,  H03J3/06

CPC分类号： H04B1/7073 ,  H04B1/7093 ,  H04L7/042 ,  H04L7/06 ,  H04L7/08

摘要： A time reference point can be determined in a radio system by sending a synchronization sequence s(i), i=0, . . . N−1, from transmitter X, 40 to receiver Y, 48, and by detecting the peak value at the output of a matched-filter, 44, h(i)=s(N−1-i) on Y. In practical systems the accuracy of this peak detection is limited by interference and noise on the radio channel. To increase the peak detection accuracy, we propose to repeat the transmission of the same synchronization sequence K times. The interval L between repetitions is constant and the amplitude of the synchronization sequence in each repetition varies according to a given variation pattern a(jL), j=0, . . . , K−1. The receiver Y, 48 knows L and a(jL), j=0, . . . , K−1. After comparison to a threshold, the matched-filter 44 at the receiver 48 may deliver peaks resulted from repeatedly received synchronization sequences or peaks caused by interference and/or noise.

摘要翻译： 通过发送同步序列s（i），i = 0，可以在无线电系统中确定时间参考点。 。 。 N-1，从发射机X，40到接收机Y，48，以及通过检测匹配滤波器的输出上的峰值，44，h（i）= s（N-1-i） 系统的这种峰值检测的准确性受到无线电信道上的干扰和噪声的限制。 为了提高峰值检测精度，我们建议重复同步序列K次的传输。 重复之间的间隔L是恒定的，并且每个重复中的同步序列的幅度根据给定的变化模式a（jL）j = 0而变化。 。 。 ，K-1。 接收机Y，48知道L和a（jL），j = 0。 。 。 ，K-1。 在与阈值进行比较之后，接收器48处的匹配滤波器44可传递由重复接收的同步序列或由干扰和/或噪声引起的峰值所产生的峰值。

公开(公告)号：US20090196163A1

公开(公告)日：2009-08-06

申请号：US12306279

申请日：2007-06-21

申请人： Yonggang Du

发明人： Yonggang Du

IPC分类号： H04J11/00 ,  H04W72/04 ,  H04L5/02 ,  H04L27/28

CPC分类号： H04L5/0046 ,  H04L5/0007 ,  H04L25/0202 ,  H04L25/0226 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/2628 ,  H04L27/265 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

摘要： The present invention relates to a communication system comprising a plurality of terminals each having an uplink transmission unit (1) for transmitting radio frequency OFDM signals at a radio frequency and an access point having an uplink receiving unit (4) for concurrently receiving said radio frequency OFDM signals from at least two terminals, said OFDM signals being Orthogonal Frequency Division Multiplex (OFDM) modulated, wherein the bandwidth of said uplink transmission units and of the transmitted radio frequency OFDM signals is smaller than the bandwidth of said uplink receiving unit, that the bandwidth of at least two uplink transmission units and of their transmitted radio frequency OFDM signals is different and that the uplink transmission unit is adapted to assign different connections for concurrently transmitting radio frequency OFDM signals to different sub-carriers in the same time slots or to the same or different sub-carriers in different time slots.

摘要翻译： 本发明涉及一种包括多个终端的通信系统，每个终端具有用于以射频发送射频OFDM信号的上行链路传输单元（1）和具有用于同时接收所述射频的上行链路接收单元（4）的接入点 来自至少两个终端的OFDM信号，所述OFDM信号是正交频分复用（OFDM）调制的，其中所述上行链路传输单元和发射的射频OFDM信号的带宽小于所述上行链路接收单元的带宽， 至少两个上行链路传输单元的带宽及其发射的射频OFDM信号的带宽不同，并且上行链路传输单元适于分配不同的连接，用于将相同时隙中的不同子载波同时发射射频OFDM信号，或 不同时隙中的相同或不同的子载波。

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：US06278690B1

公开(公告)日：2001-08-21

申请号：US09057651

申请日：1998-04-09

申请人： Christoph Herrmann ,  Yonggang Du ,  Klaus P. May

发明人： Christoph Herrmann ,  Yonggang Du ,  Klaus P. May

IPC分类号： H04J116

CPC分类号： H04Q11/0478 ,  H04L12/437 ,  H04L2012/5612 ,  H04L2012/5627 ,  H04L2012/563 ,  Y10S370/909

摘要： A local area network with a plurality of nodes for transmitting cells in the asynchronous transfer mode over a ring system having two opposite direction rings. In the event of a defect in a transmitting line from a node, or a defect in a neighboring node, a loop is formed in this node to reroute messages from one ring to the other. First, a node detecting a defect transmits a message of a first type to all other involved nodes, identifying the location of the detected defect. This information is entered in a respective status table in each node. After evaluating the information in its status table, a node which should form a loop does so, and sends a message of a second type identifying the loop to any nodes which do not already have this information.

摘要翻译： 一种具有多个节点的局域网，用于通过具有两个相反方向环的环系统以异步传输模式传送小区。 在来自节点的传输线路中的缺陷或相邻节点的缺陷的情况下，在该节点中形成环路以将消息从一个环路重新路由到另一个环路。 首先，检测缺陷的节点向所有其他相关节点发送第一类型的消息，识别检测到的缺陷的位置。 该信息被输入到每个节点的相应状态表中。 在对其状态表中的信息进行评估之后，应该形成循环的节点执行此操作，并且向没有该信息的任何节点发送标识循环的第二类型的消息。

公开(公告)号：US06198909B1

公开(公告)日：2001-03-06

申请号：US09134108

申请日：1998-08-14

申请人： Yonggang Du

发明人： Yonggang Du

IPC分类号： H04Q720

CPC分类号： H04W16/10 ,  H04W16/14 ,  Y02D70/142

摘要： In a communication environment with a number of radio systems a radio station in one of the radio systems seizes a sub-frequency range in a predetermined frequency range. Prior to each transmission of a useful signal, the one radio station checks whether a given sub-frequency range in the predetermined frequency range is free for a selected size of a propagation area. If the given sub-frequency range is free, the radio station transmits at random instants at least two pulses with a transmission range that is substantially restricted to the given sub-frequency range and avoids collisions with another radio system belonging to the communication environment by detecting whether the other radio system has seized the sub-frequency range in an overlapping radio propagation area at the same time. If the given sub-frequency range is free for the selected size of the radio propagation area and no collision with the other radio system is detected, the radio station transmits useful signals restricted to the given sub-frequency range.

摘要翻译： 在具有多个无线电系统的通信环境中，其中一个无线电系统中的无线电站占用预定频率范围内的子频率范围。 在每个发送有用信号之前，一个无线电台检查预定频率范围内的给定子频率范围是否对于所选择的传播区域的大小是空闲的。 如果给定的子频率范围是空闲的，则无线电台以随机时刻发送至少两个具有实质上限于给定子频率范围的传输范围的脉冲，并且通过检测来避免与属于通信环境的另一无线电系统的冲突 无线电系统是否同时在重叠的无线电传播区域中占用了子频率范围。 如果给定的子频率范围对于所选大小的无线电传播区域是空闲的，并且没有检测到与其他无线电系统的冲突，则无线电台发送限制到给定子频率范围的有用信号。

公开(公告)号：US5640384A

公开(公告)日：1997-06-17

申请号：US489471

申请日：1995-06-12

申请人： Yonggang Du

发明人： Yonggang Du

IPC分类号： H04B7/24 ,  H04L12/28 ,  H04L12/42 ,  H04L12/70 ,  H04Q11/04 ,  H04W16/18 ,  H04J3/14 ,  H04L12/437 ,  H04Q7/34

CPC分类号： H04W16/18 ,  H04L12/42 ,  H04Q11/0478 ,  H04L2012/5607 ,  H04L2012/5619 ,  H04L2012/563

摘要： The application describes a network comprising transceivers (1..6) linked in a network topology. The positions of the transceivers in the network topology are changed in dependence on the loads on the end-to-end connections (VC1..VC5) between the transceivers in the network. A configuration is chosen to give efficient use of the capacity available in the network. Each time that a new end-to-end connection (VC) within the network is set up the positions of the transceivers (1..6) are changed such that the network remains optimized.

摘要翻译： 该应用描述了包括以网络拓扑链接的收发器（1..6）的网络。 收发器在网络拓扑中的位置根据网络中收发器之间的端到端连接（VC1..VC5）的负载而改变。 选择配置以有效利用网络中可用的容量。 每当建立网络内的新的端对端连接（VC）时，收发器（1..6）的位置被改变，使得网络保持优化。

公开(公告)号：US5537399A

公开(公告)日：1996-07-16

申请号：US360904

申请日：1994-12-21

申请人： Yonggang Du

发明人： Yonggang Du

IPC分类号： H04Q3/00 ,  H04L12/28 ,  H04L12/70 ,  H04Q11/04 ,  H04B7/212

CPC分类号： H04W48/08 ,  H04Q11/0478 ,  H04L2012/5607 ,  H04L2012/5619 ,  H04W84/12

摘要： A local area network comprises a plurality of network interfaces with each network interface coupled to a station, the network interfaces further for exchanging data with each other. The local area network further comprises a distribution station for exchanging data with the network interfaces. The distribution station further receives load information of the network interfaces, and in response to the load information, transmits a channel distribution for the exchange of data between the network interfaces.

摘要翻译： 局域网包括多个网络接口，其中每个网络接口耦合到站，所述网络接口进一步用于彼此交换数据。 局域网还包括用于与网络接口交换数据的分发站。 分发站还接收网络接口的负载信息，响应于负载信息，在网络接口之间传输数据交换数据。

公开(公告)号：US20090175260A1

公开(公告)日：2009-07-09

申请号：US12304126

申请日：2007-06-12

申请人： Xiangyu Wang ,  Yonggang Du

发明人： Xiangyu Wang ,  Yonggang Du

IPC分类号： H04J3/06

CPC分类号： H04W56/001 ,  H04J3/0658

摘要： There is elucidated a method of communicating data packets (210; 520) within a data communication network (10). The network (10) comprises communication nodes (30a, 30b, 30c, 40), wherein a first nodal set (30a, 30b, 30c) comprises nodes which are operable to communicate via a communication medium with a second nodal set (40) comprising at least one of said nodes (30a, 30b, 30c, 40). The method comprises steps of: (a) mutually synchronizing together two or more nodes of said first nodal set; and (b) simultaneously in a synchronized manner transmitting one or more data packets from the mutually synchronized two or more nodes of said first nodal set via said communication medium for substantially simultaneous reception at said second nodal set (40). The network (10) is susceptible to being simpler to implement in comparison to comparable contemporary communication networks, as well as potentially providing a better quality-of-service (QoS) especially when handover from one access point node to another is considered.

摘要翻译： 阐述了在数据通信网络（10）内传送数据分组（210; 520）的方法。 网络（10）包括通信节点（30a，30b，30c，40），其中第一节点组（30a，30b，30c）包括可操作以经由通信介质与第二节点组（40）通信的节点， 所述节点（30a，30b，30c，40）中的至少一个。 该方法包括以下步骤：（a）将所述第一节点组的两个或多个节点相互同步; 和（b）同步地以同步的方式经由所述通信介质从所述第一节点组的相互同步的两个或更多个节点发送一个或多个数据分组，用于在所述第二节点集（40）处基本上同时接收。 与可比较的当代通信网络相比，网络（10）易于实现，并且潜在地提供更好的服务质量（QoS），特别是当考虑从一个接入点节点到另一个接入点节点的切换时。

公开(公告)号：US20070087748A1

公开(公告)日：2007-04-19

申请号：US10578932

申请日：2004-11-03

申请人： Yonggang Du ,  Shao Xiaoling ,  Jin Xiaohui ,  Feng Lei ,  Liu Bo

发明人： Yonggang Du ,  Shao Xiaoling ,  Jin Xiaohui ,  Feng Lei ,  Liu Bo

IPC分类号： H04Q7/20

CPC分类号： H04W36/0011 ,  H04W8/26 ,  H04W60/00 ,  H04W84/04 ,  H04W84/12

摘要： A communication method for a mobile terminal to perform seamless handover between a WWAN and a WLAN, comprising steps of: receiving a registration message sent by said mobile terminal when it enters said WLAN, wherein said registration message at least contains a WLAN address that said mobile terminal acquires when entering said WLAN; establishing the mapping relationship between said MAN address and said WLAN address of said mobile terminal according to said registration message; encapsulating said WLAN address into the data information to be sent to said mobile terminal according to said mapping relationship when receiving the data information to be sent to said mobile terminal from a source address; and sending the data information containing said WLAN address to said mobile terminal via said WLAN.

摘要翻译： 一种用于移动终端在WWAN和WLAN之间执行无缝切换的通信方法，包括以下步骤：当所述移动终端进入所述WLAN时，接收由所述移动终端发送的注册消息，其中所述注册消息至少包含所述移动终端 终端在进入WLAN时获取; 根据所述注册消息建立所述移动终端的所述MAN地址与所述WLAN地址之间的映射关系; 当从源地址接收要发送到所述移动终端的数据信息时，根据所述映射关系将所述WLAN地址封装成要发送到所述移动终端的数据信息; 以及经由所述WLAN将包含所述WLAN地址的数据信息发送到所述移动终端。

公开(公告)号：US20060252416A1

公开(公告)日：2006-11-09

申请号：US10551310

申请日：2004-03-29

申请人： Yonggang Du ,  Li Sun ,  Ni Ma ,  Neil Bird

发明人： Yonggang Du ,  Li Sun ,  Ni Ma ,  Neil Bird

IPC分类号： H04Q7/20

CPC分类号： H04W88/04 ,  H04L45/00 ,  H04W40/22 ,  H04W84/04 ,  H04W84/18

摘要： The present invention provides a wireless communication system capable of managing multi-hop communications. In one embodiment, upon receiving a request from a mobile terminal for initiating a call, the system determines whether the mobile terminal can use multi-hop communication services and its operating mode for multi-hop communication. The system also determines whether relaying can be provided by other mobile terminals. Then, the system will establish multi-hop communication between the mobile terminal and the system based on the operating mode of the mobile terminal. In a default mode, multi-hop communication can be established without the user's knowledge. In a prompt mode, however, the system sends a prompt to the mobile terminal for selection of the multi-hop communication services, along with information about incentives for using the services. After the multi-hop communication is completed, the system records information relating to the multi-hop communication services for the originating and relaying mobile terminals in the HLR/VLR.

摘要翻译： 本发明提供一种能够管理多跳通信的无线通信系统。 在一个实施例中，在从移动终端接收到用于发起呼叫的请求时，系统确定移动终端是否可以使用多跳通信服务及其用于多跳通信的操作模式。 该系统还确定是否可以由其他移动终端提供中继。 然后，系统将基于移动终端的操作模式，建立移动终端与系统之间的多跳通信。 在默认模式下，无需用户知识就可以建立多跳通信。 然而，在提示模式中，系统向移动终端发送提示以选择多跳通信服务，以及关于使用服务的激励的信息。 在多跳通信完成之后，系统记录与HLR / VLR中的发起和中继移动终端的多跳通信业务有关的信息。