Method and apparatus for tracking beam in wireless communication system

Abstract

A method and an apparatus for tracking a beam in a wireless communication system are provided. In the method, a plurality of downlink reference signals are received from a base station and at least one downlink transmission beam pattern is determined. A plurality of uplink reference signals are transmitted to the base station, each includes identifier information corresponding to the determined at least one downlink transmission beam pattern. ACKnowledgement (ACK) information indicating that the base station has successfully received an identifier included in the identifier information corresponding to the determined at least one downlink transmission beam pattern from identifier information corresponding to an uplink transmission beam pattern and that the plurality of uplink reference signals from the base station is received.

What is claimed is: 
     
         1 . A method for operating a receiver in a wireless communication system, the method comprising:
 receiving, from a transmitter, a plurality of reference signals through a plurality of reception beams;   determine at least one transmission/reception beam pair based on the plurality of reference signals;   transmitting, to the transmitter, first information indicating at least one transmission beam of the at least one transmission/reception beam pair; and   receiving, from the transmitter, acknowledgement (ACK) information indicating that the first information is received by the transmitter.   
     
     
         2 . The method of  claim 1 ,
 wherein the transmitting; to the transmitter, of the first information indicating the at least one transmission beam of the at least one transmission/reception beam pair comprises transmitting, to the transmitter, a plurality of other reference signals comprising the first information indicating the at least one transmission beam of the at least one transmission/reception beam pair through a plurality of transmission beams, and   wherein the receiving, from the transmitter, of the ACK information indicating that the first information is received by the transmitter comprises receiving, from the transmitter, the ACK information indicating that the first information is received by the transmitter and second information indicating at least one other transmission beam determined based on the plurality of other reference signals by the transmitter.   
     
     
         3 . The method of  claim 2 , further comprising:
 transmitting, if the second information is received from the transmitter, other ACK information to the transmitter; and   transmitting, if the second information is not received from the transmitter, negative acknowledgement (NACK) information to the transmitter.   
     
     
         4 . The method of  claim 2 , further comprising:
 re-transmitting, if the second information is received and negative acknowledgement (NACK) information indicating that the first information is not received by the transmitter is received from the transmitter, the first information to the transmitter.   
     
     
         5 . The method of  claim 2 , further comprising:
 re-transmitting, if the second information is not received and negative acknowledgement (NACK) information indicating that the first information is not received by the transmitter is received from the transmitter, the plurality of other reference signals comprising the first information to the transmitter; and   re-receiving, from the transmitter, the second information and the ACK information.   
     
     
         6 . A method for operating a transmitter, the method comprising:
 transmitting, to a receiver, a plurality of reference signals through a plurality of transmission beams;   receiving, from the receiver, first information indicating at least one transmission beam determined based on the plurality of reference signals by the receiver; and   transmitting, to the receiver, acknowledgement (ACK) information indicating that th e first information is received.   
     
     
         7 . The method of  claim 6 ,
 wherein the receiving, from the receiver, of the first information indicating the at least one transmission beam determined based on the plurality of reference signals by the receiver comprises receiving, from the receiver, a plurality of other reference signals comprising the first information indicating the at least one transmission beam determined based on the plurality of reference signals by the receiver through a plurality of reception beams, and   further comprising determining at least one transmission/reception beam pair based on the plurality of other reference signals,   wherein the transmitting, to the receiver, of the ACK information indicating that the first information is received comprises transmitting, to the receiver, the ACK information indicating that the first information is received and second information indicating at least one other transmission beam of the at least one transmission/reception beam pair.   
     
     
         8 . The method of  claim 7 , further comprising:
 receiving, if the second information is received by the receiver; other ACK information from the receiver; and   receiving, if the second information is not received by the receiver, negative acknowledgement (NACK) information from the receiver.   
     
     
         9 . The method of  claim 7 , further comprising:
 re-receiving, if the second information is transmitted and negative acknowledgement (NACK) information indicating that the first information is not received is transmitted to the receiver, the first information from the receiver.   
     
     
         10 . The method of  claim 7 , further comprising:
 re-receiving, if the second information is not transmitted and negative acknowledgement (NACK) information indicating that the first information is not received is transmitted to the receiver, the plurality of other reference signals comprising the first information from the receiver; and   re-transmitting; to the receiver; the second information and the ACK information.   
     
     
         11 . A receiver in wireless communication system, the receiver comprising:
 a reception unit configured to receive, from a transmitter, a plurality of reference signals through a plurality of reception beams;   a control unit configured to determine at least one transmission/reception beam pair based on the plurality of reference signals; and   a transmission unit configured to transmit, to the transmitter, first information indicating at least one transmission beam of the at least one transmission/reception beam pair,   wherein the reception unit is further configured to receive; from the transmitter, acknowledgement (ACK) information indicating that the first information is received by the transmitter.   
     
     
         12 . The receiver of  claim 11 ,
 wherein the transmission unit is configured to transmit, to the transmitter, a plurality of other reference signals comprising the first information indicating the at least one transmission beam of the at least one transmission/reception beam pair through a plurality of transmission beams, and   wherein the reception unit is configured to receive, from the transmitter, the ACK information indicating that the first information is received by the transmitter and second information indicating at least one other transmission beam determined based on the plurality of other reference signals by the transmitter.   
     
     
         13 . The receiver of  claim 12 , wherein the transmission unit is further configured to:
 transmit, if the second information is received from the transmitter, other ACK information to the transmitter; and   transmit, if the second information is not received from the transmitter, negative acknowledgement (NACK) information to the transmitter.   
     
     
         14 . The receiver of  claim 12 , wherein the transmission unit is further configured to re-transmit, if the second information is received and negative acknowledgement (NACK) information indicating that the first information is not received by the transmitter is received from the external device, the first information to the transmitter. 
     
     
         15 . The receiver of  claim 12 ,
 wherein the transmission unit is further configured to re-transmit, if the second information is not received and negative acknowledgement (NACK) information indicating that the first information is not received by the transmitter is received from the external device, the plurality of other reference signals comprising the first information to the transmitter, and   wherein the reception unit is further configured to re-receive, from the transmitter, the second information and the ACK information.   
     
     
         16 . A transmitter in wireless communication system, the transmitter comprising:
 a transmission unit configured to transmit, to a receiver, a plurality of reference signals through a plurality of transmission beams; and   a reception unit configured to receive, from the receiver, first information indicating at least one transmission beam determined based on the plurality of reference signals by the receiver,   wherein the transmission unit is further configured to transmit, to the receiver, acknowledgement (ACK) information indicating that the first information is received.   
     
     
         17 . The transmitter of  claim 16 , further comprising processor controller unit,
 wherein the reception unit is configured to receive, from the receiver, a plurality of other reference signals comprising the first information indicating that the at least one transmission beam determined based on the plurality of reference signals by the receiver through a plurality of reception beams,   wherein the controller unit is configured to determine at least one transmission/reception beam pair based on the plurality of other reference signals, and   wherein the transmission unit is configured to transmit, to the receiver, second information indicating at least one other transmission beam of the at least one transmission/reception beam pair and the ACK information indicating that the first information is received.   
     
     
         18 . The transmitter of  claim 17 , wherein the reception unit is further configured to:
 receive, if the second information is received by the receiver, other ACK information from the receiver; and   receive, if the second information is not received by the receiver, negative acknowledgement (NACK) information from the receiver.   
     
     
         19 . The transmitter of  claim 17 ,
 wherein the reception unit is further configured to re-receive, if the second information is transmitted and negative acknowledgement (NACK) information indicating that the first information is not received is transmitted to the receiver, the first information from the receiver.   
     
     
         20 . The transmitter of  claim 17 ,
 wherein the reception unit is further configured to re-receive, if the second information is not transmitted and negative acknowledgement (NACK) information indicating that the first information is not received is transmitted to the receiver, the plurality of other reference signals comprising the first information from the receiver, and   wherein the transmission unit is further configured to re-transmit, to the receiver, the second information and the ACK information.