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

• US 10,420,107 B2
• Filed: 09/08/2017
• Issued: 09/17/2019
• Est. Priority Date: 09/08/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Krishnamoorthy, Parthasarathy, Juneja, Ishdeep Singh, Pasunooru, Naveen Kumar, Mohan, Prashanth, Annam, Raevanth Venkat
• Primary Examiner(s): Nealon, William
• Application Number:
  US15/699,652
• Publication Number:
  US 20190082439A1
• Time in Patent Office: 739 Days
• Field of Search: 370329
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

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.

Claims

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 performing the device-to-device communication by tuning at least one communication chain of the apparatus to the at least one frequency band.

27. The apparatus of claim 26, wherein the apparatus includes means for retuning the at least one communication chain to a serving cell frequency and means for activating carrier aggregation after the device-to-device communication is performed.

28. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment, cause the one or more processors 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.

29. The non-transitory computer-readable medium of claim 28, 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.

30. The non-transitory computer-readable medium of claim 28, wherein the at least one frequency band is identified based at least in part on a system information block received by the user equipment.