Allocation of device id in device to device communications

A base station (eNB) for assigning a device identification (ID) of a device-to-device (D2D) network to a mobile station, the eNB comprising:

• processing circuitry configured to:
• select a subset from a set of parameters from which the device ID is determined, each parameter in the set having a number of bits for complete representation, the subset comprising a number Nd2d of parameters used to determine the device ID;
• determine a number L of device ID bits to represent the device ID;
• divide the L device ID bits into a group of l1 indicator bits and a group of l2 identifier bits, wherein l2 is the difference between the number L of device ID bits and the number l1 of bits allocated to the group of indicator bits;
• assign bit values to the l1 indicator bits;
• allocate a number Ljp of the l2 identifier bits to each of the parameters in the subset;
• and
• assign bit values the l2 identifier bits according to one or more functions.

A mobile station for assigning a device identification (ID) of a device-to-device (D2D) network, the mobile station comprising:

• processing circuitry configured to:
• select a subset from a set of parameters from which the device ID is determined, each parameter in the set having a number of bits for complete representation, the subset comprising a number Nd2d of parameters used to determine the device ID;
• determine a number L of device ID bits to represent the device ID;
• divide the L device ID bits into a group of l1 indicator bits and a group of l2 identifier bits, wherein l2 is the difference between the number L of device ID bits and the number l1 of bits allocated to the group of indicator bits;
• assign bit values to the l1 indicator bits;
• allocate a number Ljp of the l2 identifier bits to each of the parameters in the subset;
• and
• assign bit values the l2 identifier bits according to one or more functions.