Techniques and apparatuses for device-to-device communication using an active secondary component carrier communication chain

Patent metadata

Field	Value
Publication number	US-10420107-B2
Application number	US-201715699652-A
Country	US
Kind code	B2
Filing date	Sep 8, 2017
Priority date	Sep 8, 2017
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine whether at least one frequency band, designated for device-to-device communication of the user equipment, is associated with an active SCC of the user equipment; and selectively perform the device-to-device communication using a particular communication chain of the user equipment based at least in part on whether the at least one frequency band is associated with the active SCC, wherein the particular communication chain is tuned to the at least one frequency band for communication using the active SCC. Numerous other aspects are provided.

First claim

What is claimed is:

1. A method of wireless communication performed by a user equipment, comprising:
determining whether at least one frequency band, designated for device-to-device communication of the user equipment, is associated with an active secondary component carrier (SCC) of the user equipment;
selecting a first communication chain of the user equipment for the device-to-device communication based at least in part on whether the at least one frequency band is associated with the active SCC,
wherein, when the at least one frequency band is associated with the active SCC, the first communication chain is selected to be a communication chain associated with the active SCC; and

performing the device-to-device communication using the first communication chain.

2. The method of claim 1 , wherein, the at least one frequency band is associated with the active SCC, and the device-to-device communication is performed using the communication chain associated with the active SCC.

3. The method of claim 1 , wherein the at least one frequency band is identified based at least in part on a system information block received by the user equipment.

4. The method of claim 1 , wherein the first communication chain is released for communication using the active SCC after the device-to-device communication is performed.

5. The method of claim 1 , wherein the device-to-device communication comprises a Long Term Evolution-Direct (LTE-D) communication.

6. The method of claim 1 , wherein, when the at least one frequency band is not associated with the active SCC, the user equipment is configured to perform the device-to-device communication by tuning at least one communication chain of the user equipment to the at least one frequency band.

7. The method of claim 6 , wherein the user equipment is configured to retune the at least one communication chain to a serving cell frequency and activate carrier aggregation after the device-to-device communication is performed.

8. The method of claim 1 , wherein the at least one frequency band includes multiple frequency bands, and wherein the first communication chain is one of multiple communication chains for communication using respective active SCCs; and
wherein the device-to-device communication is performed using the multiple communication chains based at least in part on the multiple frequency bands being associated with the respective active SCCs.

9. The method of claim 1 , wherein the user equipment is associated with a connected-mode discontinuous reception (CDRX) cycle length of approximately 40 milliseconds.

10. The method of claim 1 , wherein, when the at least one frequency band is associated with the active SCC, the device-to-device communication is performed using the first communication chain without retuning the first communication chain.

11. A user equipment for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory, the memory and the at least one processor configured to:
determine whether at least one frequency band, designated for device-to-device communication of the user equipment, is associated with an active secondary component carrier (SCC) of the user equipment;
select a first communication chain of the user equipment for the device-to-device communication based at least in part on whether the at least one frequency band is associated with the active SCC,
wherein, when the at least one frequency band is associated with the active SCC, the first communication chain is selected to be a communication chain associated with the active SCC; and

perform the device-to-device communication using the first communication chain.

12. The user equipment of claim 11 , wherein, the at least one frequency band is associated with the active SCC, and the device-to-device communication is performed using the communication chain associated with the active SCC.

13. The user equipment of claim 11 , wherein the at least one frequency band is identified based at least in part on a system information block received by the user equipment.

14. The user equipment of claim 11 , wherein the first communication chain is released for communication using the active SCC after the device-to-device communication is performed.

15. The user equipment of claim 11 , wherein the device-to-device communication comprises a Long Term Evolution-Direct (LTE-D) communication.

16. The user equipment of claim 11 , wherein, when the at least one frequency band is not associated with the active SCC, the user equipment is configured to perform the device-to-device communication by tuning at least one communication chain of the user equipment to the at least one frequency band.

17. The user equipment of claim 16 , wherein the user equipment is configured to retune the at least one communication chain to a serving cell frequency and activate carrier aggregation after the device-to-device communication is performed.

18. The user equipment of claim 11 , wherein the at least one frequency band includes multiple frequency bands, and wherein the first communication chain is one of multiple communication chains for communication using respective active SCCs; and
wherein the device-to-device communication is performed using the multiple communication chains based at least in part on the multiple frequency bands being associated with the respective active SCCs.

19. The user equipment of claim 11 , wherein the user equipment is associated with a connected-mode discontinuous reception (CDRX) cycle length of approximately 40 milliseconds.

20. The user equipment of claim 11 , wherein, when the at least one frequency band is associated with the active SCC, the device-to-device communication is performed using the first communication chain without retuning the first communication chain.

21. An apparatus for wireless communication, comprising:
means for determining whether at least one frequency band, designated for device-to-device communication of the apparatus, is associated with an active secondary component carrier (SCC) of the apparatus;
means for selecting a first communication chain of the apparatus for the device-to-device communication based at least in part on whether the at least one frequency band is associated with the active SCC,
wherein, when the at least one frequency band is associated with the active SCC, the first communication chain is selected to be a communication chain associated with the active SCC; and

means for performing the device-to-device communication using the first communication chain.

22. The apparatus of claim 21 , wherein, the at least one frequency band is associated with the active SCC, and the device-to-device communication is performed using the communication chain associated with the active SCC.

23. The apparatus of claim 21 , wherein the at least one frequency band is identified based at least in part on a system information block received by the apparatus.

24. The apparatus of claim 21 , wherein the first communication chain is released for communication using the active SCC after the device-to-device communication is performed.

25. The apparatus of claim 21 , wherein the device-to-device communication comprises a Long Term Evolution-Direct (LTE-D) communication.

26. The apparatus of claim 21 , wherein, when the at least one frequency band is not associated with the active SCC, the apparatus includes means for perform

Assignees

• Qualcomm Inc

Inventors

• Krishnamoorthy Parthasarathy
• Juneja Ishdeep Singh
• Pasunooru Naveen Kumar
• Mohan Prashanth
• Annam Raevanth Venkat

Classifications

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04L5/003 Primary

  Arrangements for allocating sub-channels of the transmission path · CPC title

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title

• H04L25/0202

  Channel estimation · CPC title

• H04L5/0023

  Time-frequency-space · CPC title