# US 11,452,133 B2 · Opportunistic extended channel uplink grants for ECC > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,133 B2 - Document ID: US11452133B2 - Status: Granted - Kind: B2 - Application number: 16/677,583 - Filed: 2019-11-07 - Published: 2020-03-05 - Granted: 2022-09-20 - Earliest claimed: 2015-09-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jing Sun; Tao Luo; Taesang Yoo; Siddhartha Mallik - Web page: https://patentgrep.com/patent/US11452133B2 ## CPC - H04W 74/04: Scheduled access (hybrid access H04W74/02) - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 27/00: Modulated-carrier systems - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/542: using measured or perceived quality - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04L 5/001: {the frequencies being arranged in component carriers} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 1) 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. ### Claim 6 (depends on 1) The method of claim 1, wherein the second uplink grant indicates that the extended clear channel assessment check on the second channel is unsuccessful. ### Claim 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. ### Claim 8 (depends on 7) 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. ### Claim 9 (depends on 7) 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. ### Claim 10 (depends on 7) 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. ### Claim 11 (depends on 7) 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. ### Claim 12 (depends on 7) The apparatus of claim 7, wherein the second uplink grant indicates that the extended clear channel assessment check on the second channel is unsuccessful. ### Claim 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. ### Claim 14 (depends on 13) 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. ### Claim 15 (depends on 13) 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. ### Claim 16 (depends on 7) 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. ### Claim 17 (depends on 13) 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.