Interference Measurement and Reporting for Device-to-Device Communications in a Communication System

An apparatus, comprising:

• a processor;
• and
• memory including computer program code,
• said memory and said computer program code configured, with said processor, to cause said apparatus to perform at least the following:
• receive a downlink (DL) resource allocation reserving a portion of symbols for a device-to-device (D2D) preamble transmission;
• monitor an interference transmission from D2D user equipment participating in cellular communications employing a communication resource;
• and
• format a message for reporting the interference levels observed during the interference transmission.

An apparatus, comprising:

• a processor;
• and
• memory including computer program code,
• said memory and said computer program code configured, with said processor, to cause said apparatus to perform at least the following:
• receive a resource allocation for a device-to-device (D2D) preamble message to be sent enabling an interference measurement during a specified symbol period in a time division duplex (TDD) frame on a communications resource in a cellular communications system;
• and
• format a D2D preamble for communications during the specified symbol on the TDD frame in the communications resource.

An apparatus, comprising:

• a processor;
• and
• memory including computer program code,
• said memory and said computer program code configured, with said processor, to cause said apparatus to perform at least the following:
• receive a resource allocation for a downlink resource in a communications resource in a cellular system reserving one selected from beamforming symbols and predefined precoded reference symbols (RS) for a transmission enabling an interference measurement;
• and
• monitor the beamforming symbols or RS employing said downlink resource in said communication resource as a function of the received resource allocation.