Asymmetric adaptive modulation in a wireless communication system
    1.
    发明公开
    Asymmetric adaptive modulation in a wireless communication system 审中-公开
    无线通信系统中的非对称自适应调制

    公开(公告)号:EP2667516A3

    公开(公告)日:2017-07-19

    申请号:EP13177285.7

    申请日:2002-08-19

    申请人: WI-LAN, Inc.

    IPC分类号: H04B1/38 H04L1/00 H04L1/20

    CPC分类号: H04L1/20 H04L2001/0093

    摘要: One embodiment of the system and method provides asymmetric adaptive modulation which allows uplink and downlink subframes (304, 302, respectively) of data to be transmitted between a base station (102) and a CPE (104) with different modulation schemes, thus increasing the efficiency of downlink transmissions while maintaining the stability of uplink transmissions. In systems with multiple CPEs, each CPE (104) and base station (102) pair can independently select their uplink and downlink modulation techniques. The system and method are also adaptive in that they adjust the modulation schemes based on, for example, signal to noise ratio measurements or bit error rate measurements.

    摘要翻译: 该系统和方法的一个实施例提供非对称自适应调制,其允许以不同调制方案在基站(102)和CPE(104)之间传输数据的上行链路和下行链路子帧(分别为304,302),因此增加 下行链路传输的效率,同时保持上行链路传输的稳定性。 在具有多个CPE的系统中,每个CPE(104)和基站(102)对可以独立地选择其上行链路和下行链路调制技术。 该系统和方法也是自适应的,因为它们基于例如信噪比测量或误码率测量来调整调制方案。

    TV WHITE SPACE DEVICES USING STRUCTURED DATABASES
    2.
    发明公开
    TV WHITE SPACE DEVICES USING STRUCTURED DATABASES 审中-公开
    白葡萄酒VORRICHTUNGENFÜRTV-FREQUENZSPEKTRUM MIT STRUKTURIERTEN DATENBANKEN

    公开(公告)号:EP2591622A4

    公开(公告)日:2017-01-25

    申请号:EP10854255

    申请日:2010-07-09

    申请人: WI-LAN INC

    IPC分类号: H04W16/14 H04W24/00 H04W28/20

    摘要: A two-level database structure for use by unlicensed TVBD devices operating in TV white space comprises a central database and local databases. The central database comprises two sub-database: the central licensed database which maintains information about all licensed TV devices and the central unlicensed database which maintains information about unlicensed wireless devices operating in TV spectrum. The local database is created by each TVBD device or TVBD network when it initiates and it stores information related to all transmitters in the local area including location, power transmission levels, operating schedule, sensing results, backup channel information. The local databases communicate with central database to query it about licensed usage of TV spectrum and register with central database. The local databases communicate with each other to exchange information about channel usage, sensing results, transmission patterns and other information that will allow the local databases to negotiate coexistence without central coordinator. The locally implemented negotiation prevents the overloading of the central database.

    摘要翻译: 用于在TV空白中工作的未经许可的TVBD设备使用的两级数据库结构包括中央数据库和本地数据库。 中央数据库包括两个子数据库:中央许可数据库,其维护关于所有许可的电视设备的信息和中央非许可数据库,其维护关于在TV频谱中操作的未许可的无线设备的信息。 每台TVBD设备或TVBD网络创建本地数据库,并且存储与本地区域中的所有发射机有关的信息,包括位置,功率传输电平,操作时间表,感应结果,备份信道信息。 本地数据库与中央数据库通信,查询有关电视频谱的许可使用情况,并向中央数据库注册。 本地数据库相互通信以交换有关信道使用,感测结果,传输模式和其他信息的信息,这些信息将允许本地数据库在没有中央协调器的情况下协商共存。 本地实施的协商可以防止中央数据库的超载。

    Pre-allocated Random Access Identifiers
    7.
    发明公开
    Pre-allocated Random Access Identifiers 审中-公开
    预先分配的随机访问标识符

    公开(公告)号:EP2611253A1

    公开(公告)日:2013-07-03

    申请号:EP13161149.3

    申请日:2007-08-03

    申请人: WI-LAN, Inc.

    IPC分类号: H04W74/08

    摘要: Systems and methods of pre-allocating identifiers to wireless devices for use in requesting resources over a random access channel are described. A wireless communication system includes a random access channel over which wireless devices can anonymously send requests for resources. The base stations receiving and processing the anonymous requests reduces the probability of random access channel collisions and conserves the resources needed to support the anonymous requests by pre-allocating one or more codes to select wireless devices. The wireless devices having the pre-allocated codes can transmit a particular code over the random access channel as a request for resources that uniquely identifies the requestor.

    摘要翻译: 描述了将标识符预分配给无线设备以用于通过随机接入信道请求资源的系统和方法。 无线通信系统包括随机接入信道,无线设备可以通过该随机接入信道匿名发送资源请求。 接收和处理匿名请求的基站降低了随机接入信道冲突的可能性,并通过预分配一个或多个代码来选择无线设备来节省支持匿名请求所需的资源。 具有预先分配代码的无线设备可以通过随机接入信道发送特定代码作为对唯一标识请求者的资源的请求。