Data relay method and device in communication system
Disclosed are a relay method and device in a communication system. An operation method of a first communication node comprises the steps of: transmitting a reference signal to one or more candidate R nodes; receiving first feedback information including a minimum value of a first RSRP from a first candidate R node belonging to the one or more candidate R nodes; receiving second feedback information including a minimum value of a second RSRP from a second candidate R node belonging to the one or more candidate R nodes; comparing a first value based on the first feedback information with a second value based on the second feedback information; when the first value is greater than the second value, selecting the first candidate R node as an R node that is to perform a relaying operation; and communicating with a second communication node via the R node.
1 . An operation method of a first communication node in a communication system, the operation method comprising:
transmitting a reference signal to one or more candidate relay (R) nodes;
receiving first feedback information including a minimum value of a first reference signal received power (RSRP) from a first candidate R node belonging to the one or more candidate R nodes;
receiving second feedback information including a minimum value of a second RSRP from a second candidate R node belonging to the one or more candidate R nodes;
comparing a first value based on the first feedback information with a second value based on the second feedback information;
selecting the first candidate R node as an R node to perform a relay operation when the first value is greater than the second value; and
communicating with a second communication node through the R node,
wherein the first candidate R node satisfies a condition that a first power value is equal to or less than a second power value, the first power value means a transmit power difference between the first communication node and the second communication node, and the second power value means a maximum received power difference in which a signal distortion does not occur due to a power imbalance between signals received by the first candidate R node from the first communication node and the second communication node.
2 . The operation method according to claim 1 , wherein the first value means an average value for a time t, and the time t means a time from when the reference signal is transmitted to when the first feedback information and the second feedback information are received.
3 . The operation method according to claim 1 , wherein the second value means an average value for a time t, and the time t means a time from when the reference signal is transmitted to when the first feedback information and the second feedback information are received.
4 . The operation method according to claim 1 , wherein the second candidate R node satisfies a condition that a third power value is equal to or less than a fourth power value, the third power value means a transmit power difference between the first communication node and the second communication node, and the fourth power value means a maximum received power difference in which a signal distortion does not occur due to a power imbalance between signals received by the second candidate R node from the first communication node and the second communication node.
5 . The operation method according to claim 1 , further comprising:
transmitting first data to the R node;
receiving second data from the R node; and
performing an exclusive-OR (XOR) operation on the first data and the second data,
wherein the first data is data transmitted to the second communication node, and the second data is a result of an XOR operation on the first data and third data transmitted from the second communication node.
6 . An operation method of a relay (R) node in a communication system, the operation method comprising:
receiving a reference signal from a first communication node;
transmitting first feedback information for the reference signal to the first communication node;
receiving first data from the first communication node;
receiving third data from a second communication node;
performing an XOR operation on the first data and the third data; and
transmitting second data resulting from the XOR operation to the first communication node and the second communication node,
wherein the R node is a candidate R node satisfying a condition that a first power value is equal to or less than a second power value, the first power value means a transmit power difference between the first communication node and the second communication node, and the second power value means a maximum received power difference in which a signal distortion does not occur due to a power imbalance between signals received by the candidate R node from the first communication node and the second communication node.
7 . The operation method according to claim 6 , wherein the R node is one candidate R node selected based on the first feedback information among one or more candidate R nodes receiving the reference signal from the first communication node.
8 . The operation method according to claim 6 , wherein the first feedback information includes a first value, the first value means an average value for a time t of a minimum value of first reference signal received power (RSRP), and the time t means a time from when the reference signal is received to when the first feedback information is transmitted.
9 . The operation method according to claim 6 , wherein in the transmitting of the second data, a power of a signal transmitted to the first communication node and a power of a signal transmitted to the second communication node are allocated equally.
10 . A first communication node in a communication system, the first communication node comprising:
a processor;
a memory electronically communicating with the processor; and
instructions stored in the memory,
wherein when executed by the processor, the instructions cause the first communication node to:
transmit a reference signal to one or more candidate relay (R) nodes;
receive first feedback information including a minimum value of a first reference signal received power (RSRP) from a first candidate R node belonging to the one or more candidate R nodes;
receive second feedback information including a minimum value of a second RSRP from a second candidate R node belonging to the one or more candidate R nodes;
compare a first value based on the first feedback information with a second value based on the second feedback information;
select the first candidate R node as an R node to perform a relay operation when the first value is greater than the second value; and
communicate with a second communication node through the R node,
wherein the first candidate R node satisfies a condition that a first power value is equal to or less than a second power value, the first power value means a transmit power difference between the first communication node and the second communication node, and the second power value means a maximum received power difference in which a signal distortion does not occur due to a power imbalance between signals received by the first candidate R node from the first communication node and the second communication node.
11 . The first communication node according to claim 10 , wherein the first value means an average value for a time t, and the time t means a time from when the reference signal is transmitted to when the first feedback information and the second feedback information are received.
12 . The first communication node according to claim 10 , wherein the second value means an average value for a time t, and the time t means a time from when the reference signal is transmitted to when the first feedback information and the second feedback information are received.
13 . The first communication node according to claim 10 , wherein the second candidate R node satisfies a condition that a third power value is equal to or less than a fourth power value, the third power value means a transmit power difference between the first communication node and the second communication node, and the fourth power value means a maximum received power difference in which a signal distortion does not occur due to a power imbalance between signals received by the second candidate R node from the first communication node and the second communication node.
14 . The first communication node according to claim 10 , wherein in the communicating with the second communication node, the instructions further cause the first communication node to:
transmit first data to the R node;
receive second data from the R node; and
perform an exclusive-OR (XOR) operation on the first data and the second data,
wherein the first data is data transmitted to the second communication node, and the second data is a result of an XOR operation on the first data and third data transmitted from the second communication node.