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    • 7. 发明申请
    • SWITCHING BETWEEN CELLULAR AND LICENSE-EXEMPT (SHARED) BANDS
    • 细胞与许可证(共享)银行之间的切换
    • US20140308954A1
    • 2014-10-16
    • US14235241
    • 2011-07-28
    • Haifeng WangZhenhong LiWei ZouJing XuTing ZhouJinling Du
    • Haifeng WangZhenhong LiWei ZouJing XuTing ZhouJinling Du
    • H04W36/16
    • H04W36/165H04W36/0055H04W36/06H04W36/14H04W76/14
    • A method and an apparatus for switching D2D data communications between a licensed and a license-exempt band are disclosed. A D2D device receives from a cellular network a pre-switch notification to prepare for a switch of its D2D communications, and in response adopts a temporary strategy for conducting its D2D transmissions prior to the switch. After the switch the D2D device discontinues the temporary strategy. In one embodiment the temporary strategy and its duration are indicated in the pre-switch notification. Two example temporary strategies are presented: ‘no-new-data’ where new data transmissions are suspended and data re-transmissions are sent with high reliability; and ‘no-feedback’ where new data is sent with high reliability and data re-transmissions are suspended. Different embodiments have the cellular network access node or D2D device contending for the radio resource in the license-exempt frequency band.
    • 公开了一种在许可证和免许可频段之间切换D2D数据通信的方法和装置。 D2D设备从蜂窝网络接收预切换通知以准备其D2D通信的切换,并且响应采用用于在切换之前进行其D2D传输的临时策略。 开关后,D2D设备停止临时策略。 在一个实施例中,临时策略及其持续时间在切换前通知中指示。 提出了两个示例性的临时策略:暂停新数据传输的“新数据”,高可靠性发送数据重传; 和“无反馈”,其中发送新数据的高可靠性和数据重传被暂停。 不同的实施例具有蜂窝网络接入节点或D2D设备在免许可频段中竞争无线电资源。
    • 8. 发明申请
    • CLUSTER HEAD ASSISTED METHOD FOR CONVERTING USER TERMINAL FROM D2D COMMUNICATION TO CELLULAR COMMUNICATION
    • 用于将用户终端从D2D通信转换成细胞通信的集群头辅助方法
    • US20140179330A1
    • 2014-06-26
    • US14234873
    • 2012-01-12
    • Jinling DuTing ZhouJing XuZhenhong LiHaifeng Wang
    • Jinling DuTing ZhouJing XuZhenhong LiHaifeng Wang
    • H04W74/08
    • H04W74/0833H04W36/00H04W36/30H04W76/23H04W84/08H04W88/04
    • The present invention discloses a cluster head assisted method for converting a user terminal from device-to-device (D2D) communication to cellular communication. When quality of a D2D link between a user terminal and a cluster head is lower than a predetermined threshold, if the user terminal has to leave the cluster but still expects to continue an original the service, the user terminal performs cell search and random access, and establishes a radio resource control (RRC) connection with a target base station of a cellular network. Switching from D2D communication to cellular communication is implemented with the assistance of the cluster head, and a communication manner after the switching is provided. The present invention implements mobile switching from D2D communication in distributed cluster communication to cellular communication, which can reduce route search delay and save wireless resources.
    • 本发明公开了一种用于将用户终端从设备到设备(D2D)通信转换为蜂窝通信的簇头辅助方法。 当用户终端和集群头之间的D2D链路的质量低于预定阈值时,如果用户终端必须离开集群但仍然希望继续原始服务,则用户终端执行小区搜索和随机接入, 并建立与蜂窝网络的目标基站的无线资源控制(RRC)连接。 在D2D通信到蜂窝通信的切换的同时,在簇头的协助下进行切换,提供切换后的通信方式。 本发明实现从分布式集群通信中的D2D通信到蜂窝通信的移动交换,可以减少路由搜索延迟并节省无线资源。