Apparatus and method for identifying neighbor cell in wireless communication system
The present disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4 th -Generation (4G) communication system such as Long Term Evolution (LTE). A method of operating a terminal and a base station, and a terminal apparatus and base station apparatus, are provided. The method includes receiving a signal including a synchronization sequence and control information, which is transmitted from a neighbor cell, and decoding the control information based on a reception signal strength of the signal.
1. A method for operating a terminal connecting with a serving cell in a wireless communication system, the method comprising:
receiving synchronization sequences from the serving cell and at least one other neighbor cell;
starting a timer when a condition is satisfied, wherein the condition is defined based on reception signal strengths of the synchronization sequences;
transmitting, to the serving cell, a request not to transmit data to the terminal during a predetermined duration;
receiving, from the at least one other neighbor cell, at least one signal including a synchronization sequence and control information;
determining whether the timer is expired;
decoding the control information during the predetermined duration, if the at least one signal is received before the timer is expired;
identifying the at least one other neighbor cell based on the synchronization sequence and the decoded control information;
detecting a collision of synchronization sequences between access nodes; and
transmitting a message including information associated with the collision,
wherein the decoding of the control information comprises decoding the control information during the predetermined duration if reception signal strength of the at least one signal satisfies the condition for determining handover.
2. The method of claim 1 ,
wherein the condition is that reception signal strengths of the synchronization sequences from the at least one other neighbor cell is greater than a sum of reception signal strength of the synchronization sequence from the serving cell and a predetermined offset.
3. The method of claim 1 , further comprising:
receiving a message including information associated with the collision of synchronization sequences between the access nodes.
4. A terminal apparatus connecting with a serving cell in a wireless communication system, the apparatus comprising:
a transceiver; and
at least one processor coupled to the transceiver, and configured to:
receive synchronization sequences from the serving cell and at least one other neighbor cell,
start a timer when a condition is satisfied, wherein the condition is defined based on reception signal strengths of the synchronization sequences,
transmit, to the serving cell, a request not to transmit data to the terminal during a predetermined duration,
receive, from the at least one other neighbor cell, at least one signal including a synchronization sequence and control information;
determine whether the timer is expired,
decode the control information during the predetermined duration, if the at least one signal is received before the timer is expired,
identify the at least one other neighbor cell based on the synchronization sequence and the decoded control information,
detect a collision of synchronization sequences between access nodes, and
transmit a message including information associated with the collision,
wherein the control information is decoded during the predetermined duration if reception signal strength of the at least one signal satisfies the condition for determining handover.
5. The apparatus of claim 4 ,
wherein the processor is further configured to, if a condition is satisfied, decode the control information included in the at least one signal that is received during the predetermined duration, and
wherein the condition is defined based on reception signal strengths of the at least one signal.
6. The apparatus of claim 4 , wherein the at least one processor is further configured to transmit a message requesting allocation of a gap of the predetermined duration for decoding the control information.
7. The apparatus of claim 4 , wherein the at least one processor is further configured to receive a message including information associated with a synchronization sequence collision between the access nodes.
8. The apparatus of claim 7 , wherein the at least one processor is further configured to suspend decoding the control information included in the at least one signal that is transmitted from the at least one other neighbor cell if identification information included in the control information is not included in the information associated with the collision.