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    • 5. 发明申请
    • SWITCHING BETWEEN NETWORK BASED AND RELAY BASED OPERATION FOR MISSION CRITICAL VOICE CALL
    • 基于网络和基于继电器的任务关键语音呼叫的切换
    • WO2016162722A1
    • 2016-10-13
    • PCT/IB2015/001452
    • 2015-04-07
    • BLACKBERRY LIMITEDVUTUKURI, EswarSUZUKI, TakashiFAURIE, René
    • VUTUKURI, EswarSUZUKI, TakashiFAURIE, René
    • H04W36/30H04W40/22H04W88/04
    • H04W36/30H04W4/10H04W40/22H04W88/04
    • A device, serving cell and method of switching between modes of operation for the device in a cellular network comprises receiving a service via a connection with the serving cell. A condition indicative of deterioration in network service and an absence of a suitable neighbor cell are detected. In response, discovery of relay nodes is initiated. When a suitable relay node is discovered, a mechanism to switch to receiving the service via the suitable relay node is initiated. The service may be a mission critical push-to-talk over Long Term Evolution service. The relay node may be user equipment acting as a user equipment-to-network relay node. When the device is in an RCC_CONNECTED state, the mechanism to switch includes sending a relay mode preference indication to the serving cell, receiving a connection release message from the serving cell, releasing the serving cell connection, and establishing a sidelink connection with the relay.
    • 在蜂窝网络中的设备的操作模式之间切换的设备,服务小区和方法包括经由与服务小区的连接来接收服务。 检测到指示网络服务恶化和没有合适的相邻小区的条件。 作为响应,发起中继节点的发现。 当发现合适的中继节点时,启动通过适当的中继节点切换到接收业务的机制。 该服务可能是长期演进服务中关键任务的一键通话。 中继节点可以是充当用户设备到网络中继节点的用户设备。 当设备处于RCC_CONNECTED状态时,切换机制包括向服务小区发送中继模式偏好指示,从服务小区接收连接释放消息,释放服务小区连接,以及建立与中继器的链路连接。