RRM measurement method and apparatus in TDD system
The present disclosure provides an RRM measurement method and apparatus in a TDD system, so as to resolve a current problem that in a process of an inter-frequency measurement or an inter-RAT measurement in a TDD system, UE cannot perform an RRM measurement on a cell whose TDD uplink-downlink configuration identifier is 0. In embodiments of the present disclosure, UE performs an RRM measurement on a cell whose TDD uplink-downlink configuration identifier is 0 by using a corresponding RRM measurement method according to measurement indication information that is carried in an RRM measurement message delivered by a network device. By means of the technical solutions in the present disclosure, UE can perform an RRM measurement on a cell whose TDD uplink-downlink configuration identifier is 0 by using an RRM measurement method.
1. A radio resource management (RRM) measurement method in a time division duplex (TDD) system, comprising:
receiving, by user equipment (UE), an RRM measurement message from a network device; and
performing, by the UE, an RRM measurement on a cell whose TDD uplink-downlink configuration identifier is 0 in an RRM measurement manner that corresponds to measurement indication information carried in the received RRM measurement message, wherein when the measurement indication information carried in the RRM measurement message is period measurement indication information,
when a measurement bandwidth is six radio resource blocks RBs, the used preset measurement period is greater than 480 milliseconds and is less than 960 milliseconds; or
when a measurement bandwidth is 50 RBs, the used preset measurement period is greater than 240 milliseconds and is less than 720 milliseconds.
2. The method according to claim 1 , wherein the performing the RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 in the RRM measurement manner that corresponds to measurement indication information carried in the RRM measurement message comprises:
when the measurement indication information carried in the RRM measurement message is the period measurement indication information, performing an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset measurement period.
3. The method according to claim 1 , wherein
when the measurement bandwidth is 6 RBs, the used preset measurement period is 720 milliseconds; or
when the measurement bandwidth is 50 RBs, the used preset measurement period is 480 milliseconds.
4. A radio resource management (RRM) measurement apparatus in a time division duplex (TDD) system, comprising:
a receiver, configured to receive an RRM measurement message delivered by a network device, and send the RRM measurement message; and
a processor, configured to receive the RRM measurement message sent by the receiver, and perform an RRM measurement on a cell whose TDD uplink-downlink configuration identifier is 0 in an RRM measurement manner that corresponds to measurement indication information carried in the received RRM measurement message, wherein the processor is configured to:
when the measurement indication information carried in the RRM measurement message is period measurement indication information,
when a measurement bandwidth is six radio resource blocks RBs, use a preset measurement period greater than 480 milliseconds and less than 960 milliseconds; or
when a measurement bandwidth is 50 RBs, use a preset measurement period greater than 240 milliseconds and less than 720 milliseconds.
5. The apparatus according to claim 4 , wherein the processor is configured to:
when the measurement indication information carried in the RRM measurement message is the period measurement indication information, perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset measurement period.
6. The apparatus according to claim 4 , wherein the processor is configured to:
when the measurement bandwidth is 6 radio resource blocks RBs, use a preset measurement period of 720 milliseconds; or
when the measurement bandwidth is 50 RBs, use a preset measurement period of 480 milliseconds.
7. The apparatus according to claim 4 , wherein the processor is configured to:
perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset measurement Gap repetition period according to the measurement indication information, wherein the preset measurement Gap repetition period is greater than 10 milliseconds and is less than 40 milliseconds; or perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset measurement Gap length according to the measurement indication information, wherein the preset measurement Gap length is greater than 6 milliseconds and is less than 16 milliseconds; or perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset cell search boundary parameter, wherein the preset cell search boundary parameter is greater than −6 dB.
8. The apparatus according to claim 7 , wherein the processor is configured to perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset measurement Gap repetition period according to the measurement indication information, wherein the preset measurement Gap repetition period is 20 milliseconds; or perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset measurement Gap length according to the measurement indication information, wherein the preset measurement Gap length is 11 milliseconds; or perform an RRM measurement on the cell whose TDD uplink-downlink configuration identifier is 0 by using a preset cell search boundary parameter, wherein the preset cell search boundary parameter is −3 dB.
9. A radio resource management (RRM) measurement apparatus in a time division duplex (TDD) system, comprising:
a sender, configured to send an RRM measurement message to user equipment (UE); and
a processor, configured to instruct the UE to perform, in an RRM measurement manner that corresponds to measurement indication information carried in the RRM measurement message, an RRM measurement on a cell whose TDD uplink-downlink configuration identifier is 0, wherein
when a measurement bandwidth is six radio resource blocks RBs, a preset measurement period for the UE is greater than 480 milliseconds and is less than 960 milliseconds; or
when a measurement bandwidth is 50 RBs, the preset measurement period is greater than 240 milliseconds and is less than 720 milliseconds.
10. The apparatus according to claim 9 , wherein the sender is configured to:
send, to the UE, an RRM measurement message carrying period measurement indication information.
11. The apparatus according to claim 9 , wherein
when the measurement bandwidth is 6 RBs, the preset measurement period is 720 milliseconds; or
when the measurement bandwidth is 50 RBs, the preset measurement period is 480 milliseconds.