Method and device whereby base station allocates nodes to terminal in a semi-static fashion in multi-node system
The present invention relates to wireless communication, and more specifically, to a method and device whereby a base station allocates nodes to a terminal in a semi-static fashion in a multi-node system. The method, according to one aspect of the present invention, whereby a base station allocates at least a portion of a plurality of nodes to a terminal in a multi-node system comprising the plurality of nodes and the base station for controlling the plurality of nodes, comprises the steps of: receiving, from the terminal, data showing at least one first node that is preferred among the plurality of nodes by the terminal; and transmitting, to the terminal, first data for allocating the first node(s) to the terminal. The first data may comprise pilot data which is required by the terminal in order to transmit, to the base station, feedback data concerning the first node.
1. A method of assigning at least some of a plurality of nodes to a terminal at a base station in a multi-node system including the plurality of nodes and the base station controlling the plurality of nodes, the method comprising:
receiving, by the base station from the terminal, information indicating at least one first node preferred by the terminal among the plurality of nodes; and
transmitting, by the base station to the terminal, first information for assigning the at least one first node to the terminal,
wherein the first information includes pilot information necessary to transmit feedback information for the at least one first node to the base station,
wherein the feedback information includes at least one of a channel quality indicator (CQI) and a precoding matrix index (PMI), and
wherein the pilot information includes a reference signal (RS) for measuring the CQI or the PMI.
2. The method of claim 1 , the method further comprising receiving, by the base station, the feedback information from the terminal,
wherein the feedback information is for at least one node included in the at least one first node.
3. The method of claim 1 , wherein:
the plurality of nodes include a macro base station, a picocell base station (PeNB), a home base station (HeNB), a remote radio head (RRH), a relay, an antenna and a distributed antenna group, and
each of the plurality of nodes is connected to the base station by wire.
4. The method of claim 1 , wherein the at least one first node is determined based on path loss measured by the terminal from each of the plurality of nodes.
5. The method of claim 1 , wherein the feedback information further includes a per-node-PMI for the at least one first node.
6. The method of claim 1 , further comprising:
receiving, by the base station, the feedback information from the terminal; and
transmitting, by the base station, data to the terminal based on the received feedback information,
wherein the data is transmitted through at least one node included in the at least one first node, and
wherein the at least one node, through which the data is transmitted, is selected in consideration of a resource assignment state.
7. The method of claim 6 , further comprising transmitting, by the base station, to the terminal, an indicator indicating the at least one node, through which the data is transmitted.
8. The method of claim 6 , further comprising transmitting, by the base station, to the terminal, a total number of data streams transmitted to the terminal and index information of the data streams assigned to the terminal.
9. A method of allowing a terminal to be assigned at least some of a plurality of nodes by a base station in a multi-node system including the plurality of nodes and the base station controlling the plurality of nodes, the method comprising:
transmitting, by the terminal to the base station, information indicating at least one first node preferred by the terminal among the plurality of nodes;
receiving, by the terminal from the base station, first information for assigning the at least one first node; and
transmitting, by the terminal to the base station, feedback information for the at least one first node,
wherein the first information includes pilot information necessary to transmit the feedback information for the at least one first node to the base station,
wherein the feedback information includes at least one of a channel quality indicator (CQI) and a precoding matrix in index (PMI), and
wherein the pilot information includes a reference signal (RS) for measuring the CQI or the PMI.
10. The method of claim 9 , wherein:
the plurality of nodes include a macro base station, a picocell base station (PeNB), a home base station (HeNB), a remote radio head (RRH), a relay, an antenna and a distributed antenna group, and
each of the plurality of nodes is connected to the base station by wire.
11. The method of claim 9 , wherein the at least one first node is determined based on path loss measured by the terminal from each of the plurality of nodes.
12. The method of claim 9 , wherein the feedback information further includes a per-node-PMI for the at least one first node.
13. A base station for assigning at least some of a plurality of nodes to a terminal in a multi-node system including the plurality of nodes and the base station controlling the plurality of nodes, the base station comprising:
a reception module configured to receive information indicating at least one first node preferred by the terminal among the plurality of nodes from the terminal; and
a transmission module configured to transmit, to the terminal, first information for assigning the at least one first node to the terminal,
wherein the first information includes pilot information necessary to transmit feedback information for the at least one first node from the terminal to the base station,
wherein the feedback information includes at least one of a channel quality indicator (CQI) and a precoding matrix index (PMI), and
wherein the pilot information includes a reference signal (RS) for measuring the CQI or the PMI.
14. The base station of claim 13 , wherein the feedback information further includes a per-node-PMI for the at least one first node.
15. The base station of claim 13 , further comprising a processor configured to control reception of the feedback information from the terminal through the reception module and transmission of data to the terminal based on the received feedback information,
wherein the data is transmitted through at least one node included in the at least one first node, and
the at least one node, through which the data is transmitted, is selected in consideration of a resource assignment state.
16. A terminal assigned at least some of a plurality of nodes by a base station in a multi-node system including the plurality of nodes and the base station controlling the plurality of nodes, the terminal comprising:
a transmission module configured to transmit information indicating at least one first node preferred by the terminal among the plurality of nodes to the base station;
a reception module configured to receive first information for assigning the first node from the base station; and
a processor configured to control transmission of feedback information for the at least one first node to the base station,
wherein the first information includes pilot information necessary to transmit the feedback information for the at least one first node to the base station,
wherein the feedback information includes at least one of a channel quality indicator (CQI) and a precoding matrix index (PMI), and
wherein the pilot information includes a reference signal (RS) for measuring the CQI and PMI.