Opportunistic extended channel uplink grants for ECC

Patent metadata

Field	Value
Publication number	US-11452133-B2
Application number	US-201916677583-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Sep 30, 2015
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

Methods, systems, and devices for wireless communication are described. A wireless communication system may utilize a listen before talk (LBT) procedure prior to transmission. A base station may perform an enhanced clear channel assessment (eCCA) on one channel and a single clear channel assessment (CCA) on another channel. The base station may then send a grant for a user equipment (UE) to transmit on both channels. The UE may receive the grant, and perform a single CCA on the first channel and an eCCA on the second channel. The UE may then transmit uplink information on both the first channel and the second channel. That is, the base station may send an opportunistic grant for transmitting on the second channel even though it may not have passed eCCA at the base station. The UE may then use the channel if it passes an eCCA.

First claim

What is claimed is:

1. A method of wireless communication, comprising:
determining that a clear channel assessment check on a second channel is successful and that an extended clear channel assessment check on the second channel is unsuccessful; and
transmitting a scheduling message on a first channel based at least in part on the determination, the scheduling message identifying the first channel and the second channel, wherein the scheduling message comprises a first uplink grant for the first channel and a second uplink grant for the second channel.

2. The method of claim 1 , further comprising:
refraining from transmitting the scheduling message on the second channel based at least in part on the extended clear channel assessment check.

3. The method of claim 1 , further comprising:
identifying whether uplink data is being transmitted on the first channel or the second channel or both; and
receiving the uplink data on the first channel or the second channel based at least in part on the scheduling message.

4. The method of claim 1 , wherein a first modulation and coding scheme of the first uplink grant is different from a second modulation and coding scheme of the second uplink grant.

5. The method of claim 1 ,
wherein the second uplink grant is based at least in part on determining that the extended clear channel assessment check on the second channel is unsuccessful and that the clear channel assessment check on the second channel is successful.

6. The method of claim 1 , wherein the second uplink grant indicates that the extended clear channel assessment check on the second channel is unsuccessful.

7. An apparatus for wireless communication, comprising:
a processor,
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
determine that a clear channel assessment check on a second channel is successful and that an extended clear channel assessment check on the second channel is unsuccessful; and
transmit a scheduling message on a first channel based at least in part on the determination, the scheduling message identifying the first channel and the second channel, wherein the scheduling message comprises a first uplink grant for the first channel and a second uplink grant for the second channel.

8. The apparatus of claim 7 , wherein the instructions are further operable to cause the apparatus to:
refrain from transmitting the scheduling message on the second channel based at least in part on the extended clear channel assessment check.

9. The apparatus of claim 7 , wherein the instructions are further operable to cause the apparatus to:
identify whether uplink data is being transmitted on the first channel or the second channel or both; and
receive the uplink data on the first channel or the second channel based at least in part on the scheduling message.

10. The apparatus of claim 7 , wherein a first modulation and coding scheme of the first uplink grant is different from a second modulation and coding scheme of the second uplink grant.

11. The apparatus of claim 7 ,
wherein the second uplink grant is based at least in part on determining that the extended clear channel assessment check on the second channel is unsuccessful and the clear channel assessment check on the second channel is successful.

12. The apparatus of claim 7 , wherein the second uplink grant indicates that the extended clear channel assessment check on the second channel is unsuccessful.

13. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:
determine that a clear channel assessment check on a second channel is successful and that an extended clear channel assessment check on the second channel is unsuccessful; and
transmit a scheduling message on a first channel based at least in part on the determination, the scheduling message identifying the first channel and the second channel, wherein the scheduling message comprises a first uplink grant for the first channel and a second uplink grant for the second channel.

14. The non-transitory computer-readable medium of claim 13 , wherein the instructions are further executable to:
refrain from transmitting the scheduling message on the second channel based at least in part on the extended clear channel assessment check.

15. The non-transitory computer-readable medium of claim 13 , wherein the instructions are further executable to:
identify whether uplink data is being transmitted on the first channel or the second channel or both; and
receive the uplink data on the first channel or the second channel based at least in part on the scheduling message.

16. The non-transitory computer-readable medium of claim 7 , wherein a first modulation and coding scheme of the first uplink grant is different from a second modulation and coding scheme of the second uplink grant.

17. The non-transitory computer-readable medium of claim 13 ,
wherein the second uplink grant is based at least in part on determining that the extended clear channel assessment check on the second channel is unsuccessful and the clear channel assessment check on the second channel is successful.

Assignees

• Qualcomm Inc

Inventors

• Sun Jing
• Luo Tao
• Yoo Taesang
• Mallik Siddhartha

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W74/0808 Primary

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04L5/00

  Arrangements affording multiple use of the transmission path · CPC title