TA obtaining method and apparatus

Patent metadata

Field	Value
Publication number	US-10986599-B2
Application number	US-201616301405-A
Country	US
Kind code	B2
Filing date	May 13, 2016
Priority date	May 13, 2016
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

Embodiments of the present disclosure provide timing advance (TA) obtaining methods and apparatuses. One example method includes generating, by a base station, an indication message and sending the indication message to UE, and receiving, by the UE, the indication message sent by the base station. The UE can then obtain a TA of a second carrier based on the indication message, where the second carrier is a carrier not used to transmit a PUSCH. Although the second carrier is a carrier not used to transmit a PUSCH, the TA of the second carrier can still be obtained.

First claim

What is claimed is:

1. A Timing Advance (TA) obtaining method, comprising:
receiving an indication message sent by a base station, wherein the indication message comprises at least one of a synchronization signal or a synchronization difference between base stations; and
obtaining a TA of a second carrier based on the indication message, wherein the second carrier is a carrier not used to transmit a physical uplink shared channel (PUSCH), and wherein obtaining the TA of the second carrier based on the indication message comprises:
determining a first receiving time of the synchronization signal sent by using a third carrier; and
determining a second receiving time of the synchronization signal sent by using the second carrier.

2. The method according to claim 1 , wherein the method further comprises switching from a first carrier to the second carrier.

3. The method according to claim 1 , wherein the indication message comprises at least one of a preamble or a resource transmission identifier that needs to be transmitted on the second carrier.

4. The method according to claim 3 , wherein the resource transmission identifier comprises at least one of the following: a subframe identifier, an orthogonal frequency division multiplexing (OFDM) symbol location identifier, a carrier identifier, and a physical resource block identifier.

5. The method according to claim 3 , wherein the obtaining a TA of a second carrier based on the indication message comprises:
sending the preamble to the base station on the second carrier.

6. The method according to claim 3 , wherein the obtaining a TA of a second carrier based on the indication message comprises:
receiving a response message sent by the base station, wherein response information included in the response message comprises at least one of the TA of the second carrier or a random access power offset.

7. The method according to claim 3 , wherein the TA is determined by the base station based on receiving information about the preamble.

8. The method according to claim 1 , wherein the obtaining a TA of a second carrier based on the indication message comprises:
determining the TA of the second carrier based on a difference between the second receiving time and the first receiving time, and a TA of the third carrier.

9. A Timing Advance (TA) obtaining apparatus, comprising:
at least one processor, a receiver, and a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein:
the receiver is configured to receive an indication message sent by a base station, wherein the indication message comprises at least one of a synchronization signal or a synchronization difference between base stations; and
the programming instructions instruct the at least one processor to obtain a TA of a second carrier based on the indication message, wherein the second carrier is a carrier not used to transmit a physical uplink shared channel (PUSCH), and wherein obtaining the TA of the second carrier based on the indication message comprises:
determining a first receiving time of the synchronization signal sent by using a third carrier; and
determining a second receiving time of the synchronization signal sent by using the second carrier.

10. The apparatus according to claim 9 , wherein the programming instructions instruct the at least one processor to switch from a first carrier to the second carrier.

11. The apparatus according to claim 9 , wherein the indication message comprises at least one of a preamble or a resource transmission identifier that needs to be transmitted on the second carrier.

12. The apparatus according to claim 11 , wherein the resource transmission identifier comprises at least one of the following: a subframe identifier, an orthogonal frequency division multiplexing (OFDM) symbol location identifier, a carrier identifier, and a physical resource block identifier.

13. The apparatus according to claim 11 , wherein the programming instructions instruct the at least one processor to send the preamble to the base station on the second carrier.

14. The apparatus according to claim 11 , wherein the programming instructions instruct the at least one processor to receive a response message sent by the base station, wherein response information included in the response message comprises at least one of the TA of the second carrier or a random access power offset.

15. The apparatus according to claim 11 , wherein the TA is determined by the base station based on receiving information about the preamble.

16. The apparatus according to claim 9 , wherein the programming instructions instruct the at least one processor to determine the TA of the second carrier based on a difference between the second receiving time and the first receiving time, and a TA of the third carrier.

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Lili
• Xu Kai
• Li Xiaocui
• Tenny Nathan Edward
• Liu Bin

Classifications

• H04W56/0005 Primary

  synchronizing of arrival of multiple uplinks · CPC title

• H04W56/0045 Primary

  compensating for timing error by altering transmission time · CPC title

• H04W56/001

  Synchronization between nodes · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title