LOCATION REGISTRATION FOR A DEVICE - TO - DEVICE D2D COMMUNICATION USER EQUIPMENT BEING IN IDLE MODE MOBILITY MANAGEMENT

摘要

The invention relates to device-to-device (D2D) communications and in particular to location registration of a D2D User Equipmnet (UE) being in idle mode. A D2D capable UE (D2D cluster head) is [1] configured to communicate (312) with a communication network, is [2] able to establish D2D communication with another D2D capable UE, receives [3] (314) from the communication system a configuration so as to send location update related messaging on behalf of UEs with which D2D communication has been established, obtains [4] (316) information of a change of status of a UE regarding a D2D communication or a change of cell of a UE and in response to the information, causes [5] the sending (318) of a message to the communication network, the message comprising a location update request regarding the UE.