# US 12,114,352 B2 · Contention window adjustment method and apparatus and communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,352 B2 - Document ID: US12114352B2 - Status: Granted - Kind: B2 - Application number: 17/144,732 - Filed: 2021-01-08 - Published: 2021-04-29 - Granted: 2024-10-08 - Earliest claimed: 2018-08-10 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Qinyan Jiang; Lei Zhang; Guoyu Zhang - Web page: https://patentgrep.com/patent/US12114352B2 ## CPC - H04L 1/187: {Details of sliding window management} - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04L 1/1614: {using bitmaps} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1829: Arrangements specially adapted for the receiver end - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 74/002: {Transmission of channel access control information} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A contention window adjustment method and apparatus and a communication system. The method includes: transmitting first data by a transmitting device on a carrier, the carrier including two or more bandwidth units; and adjusting a contention window (CW) associated with a bandwidth unit to which the first data correspond by the transmitting device. Certain embodiments herein provide, in a case where data (referred to as first data) are transmitted on a carrier including two or more bandwidth units (such as a BWP/LBT sub-band/LBT channel), by adjusting the CW associated with the bandwidth unit to which the data correspond, a problem that the existing CW adjustment method is inapplicable to a scenario where a carrier corresponds to two or more bandwidth units may be solved. ## Claims ### Claim 1 A contention window adjustment apparatus, comprising: a transmitter configured to transmit first data on a carrier, the carrier comprising two or more bandwidth units indicated by a network device via first information; and processor circuitry configured to, in a case where a contention window (CW) is associated with more than one bandwidth unit in the two or more bandwidth units and the more than one bandwidth unit include a bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included, adjust the contention window (CW) according to hybrid automatic repeat request acknowledgement (HARQ-ACK) information of the first data. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the number of the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data is at least one. ### Claim 3 A contention window adjustment apparatus, comprising: a transmitter configured to transmit first data on a carrier, the carrier comprising two or more bandwidth units; and processor circuitry configured to adjust a contention window (CW) associated with a bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included according to hybrid automatic repeat request acknowledgement (HARQ-ACK) information of the first data, wherein the number of the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data is at least one, and wherein the processor circuitry is configured to: according to a reception situation of a part of data of the first data, adjust a contention window associated with a bandwidth unit within which at least parts of frequency-domain resources used for transmitting the part of data are included. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein, the processor circuitry is further configured to adjust the contention window associated with the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the part of data are included according to a first factor. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein, the first factor is used to perform counting on reception situation of code block groups (CBGs) or code blocks (CBs) of the part of data. ### Claim 6 (depends on 3) The apparatus according to claim 3, wherein, one complete code block group (CBG) of the part of data is counted as one time of successful or unsuccessful reception, and one incomplete CBG of the part of data is not counted; or one complete code block (CB) of the part of data is counted as one time of successful or unsuccessful reception, and one incomplete CB of the part of data is not counted. ### Claim 7 (depends on 3) The apparatus according to claim 3, wherein, the part of data is counted as one time of successful or unsuccessful reception. ### Claim 8 A contention window adjustment apparatus, comprising: a transmitter configured to transmit first data on a carrier, the carrier comprising two or more bandwidth units; and processor circuitry configured to adjust a contention window (CW) associated with a bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included according to hybrid automatic repeat request acknowledgement (HARQ-ACK) information of the first data, wherein the number of the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data is at least one, and wherein the processor circuitry is configured to: according to a reception situation of the first data, adjust a contention window associated with a bandwidth unit within which at least parts of frequency-domain resources used for transmitting a part of data of the first data are included. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein, the processor circuitry is further configured to adjust the contention window associated with the bandwidth unit to which the part of data corresponds according to a second factor. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein, the second factor is used to perform counting on reception situation of transport blocks (TBs) code block groups (CBGs) or code blocks (CBs) of the first data. ### Claim 11 (depends on 3) The apparatus according to claim 3, wherein the part of data is transmitted within a bandwidth range of a bandwidth unit within which at least parts of frequency-domain resources used for transmitting the part of data are included. ### Claim 12 (depends on 2) The apparatus according to claim 2, wherein the number of bandwidth units within which at least parts of frequency-domain resources used for transmitting the first data are included is two or more, at least two of the two or more bandwidth units being associated with identical contention windows, and the processor circuitry is configured to, according to a reception situation of the first data, adjust contention windows associated with the at least two bandwidth units within which at least parts of frequency-domain resources used for transmitting the first data are included. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein, one of transport block (TB) or one code block group (CBG) or one code block (CB) of the first data is counted as one time of successful or unsuccessful reception. ### Claim 14 (depends on 12) The apparatus according to claim 12, wherein parts of data of the first data transmitted respectively in the at least two bandwidth units are not completely identical. ### Claim 15 (depends on 1) The apparatus according to claim 1, wherein the processor circuitry is configured to: determine the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included according to frequency-domain resources used for transmitting the first data. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein, if all of the frequency-domain resources used for transmitting the first data are within a bandwidth range of one bandwidth unit, the one bandwidth unit is the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included; or if at least parts of the frequency-domain resources used for transmitting the first data are within a bandwidth range of one bandwidth unit, the one bandwidth unit is the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included. ### Claim 17 (depends on 15) The apparatus according to claim 15, wherein the processor circuitry is configured to determine the bandwidth unit within which at least parts of frequency-domain resources used for transmitting the first data are included according to at least one of the following: an access priority of a channel used for transmitting the first data; an interval of subcarriers used for transmitting the first data; a position of a time-domain resource used for transmitting the first data; a hybrid automatic repeat request (HARQ) process to which the first data correspond; and a time-frequency resource position of association information of the first data. ### Claim 18 (depends on 1) The apparatus according to claim 1, wherein bandwidth sizes and/or frequency-domain initial positions of at least two of the two or more bandwidth units are different. ### Claim 19 (depends on 3) The apparatus according to claim 3, wherein the processor circuitry is configured to: receive association information of the first data, and determine the reception situation of the first data or the reception situation of the part of data of the first data according to the association information of the first data. ### Claim 20 (depends on 19) The apparatus according to claim 19, wherein the association information of the first data is used to indicate that whether data on different bandwidth units to which one transport block (TB) corresponds are successfully received, and, the different bandwidth units do not overlap in the frequency domain.