Terminal and communicating method thereof in device to device communicaton
AssigneeElectronics and Telecommunications Research Institute
InventorsDae Ik KIM, JeeHyeon NA, YEON SEUNG SHIN
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Abstract
A second terminal which performs direct communication with a first terminal receives a signal for measuring a radio channel from the first terminal and calculates radio channel quality. Further, the second terminal calculates a data error rate using replay information indicating whether data are received and compensates for the radio channel quality depending on a data error rate. The second terminal reports the compensated radio channel quality to a base station and the base station uses the compensated radio channel quality to allocate resources used in direct communication.
Claims16
A communication method of a second terminal which performs direct communication with a first terminal, comprising:
- receiving a first signal for measuring a radio channel from the first terminal;
- calculating radio channel quality using the first signal;
- transmitting reply information indicating whether data are received from the second terminal to the first terminal through the direct communication;
- calculating an error rate of the data using the reply information;
- compensating for the calculated radio channel quality depending on the error rate;
- and
- reporting the compensated radio channel quality to a base station.
A terminal, comprising:
- a radio frequency module receiving a signal for measuring a data and radio channel from an opponent terminal through direct communication;
- and
- a processor connected to the radio frequency module and performing the direct communication with the opponent terminal,
- wherein the processor uses the signal to calculate radio channel quality, uses first information indicating whether data are received to calculate an error rate of hybrid automatic retransmit request (HARQ), and compensates for the calculated radio channel quality based on the calculated error rate.
A communication method of a base station controlling direct communication between a first terminal and a second terminal, comprising:
- receiving a first radio channel quality which is radio channel quality between the first terminal and the second terminal from the first terminal;
- and
- allocating resources to the first and second terminals using the first radio channel quality,
- wherein the first radio channel quality is determined based on information indicating whether data transmitted between the first terminal and the second terminal are successfully received.
Dependencies are inferred from the claim text.