# US 11,310,772 B2 · Method and apparatus for configuring bandwidth part in sidelink communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,772 B2 - Document ID: US11310772B2 - Status: Granted - Kind: B2 - Application number: 16/808,986 - Filed: 2020-03-04 - Published: 2020-09-10 - Granted: 2022-04-19 - Earliest claimed: 2019-03-06 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Su Han Choi; Gene Beck Hahn - Web page: https://patentgrep.com/patent/US11310772B2 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04W 92/18: between terminal devices - 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 An operation method of a first terminal in a communication system is provided. The method includes configuring a plurality of sidelink (SL) bandwidth parts (BWPs) used for SL communication between the first terminal and a second terminal and transmitting an SL BWP list including one or more SL BWPs among the plurality of SL BWPs to the second terminal via a default SL BWP. The SL communication is then performed with the second terminal using an initial SL BWP among the one or more SL BWPs included in the SL BWP list. ## Claims ### Claim 1 An operation method of a first terminal in a communication system, comprising: configuring, by a processor, a plurality of sidelink (SL) bandwidth parts (BWPs) used for SL communication between the first terminal and a second terminal; transmitting, by the processor, configuration information of the plurality of SL BWPs to the second terminal via a default BWP; transmitting, by the processor, an SL BWP list including one or more SL BWPs among the plurality of SL BWPs to the second terminal via the default SL BWP; and performing, by the processor, SL communication with the second terminal using an initial SL BWP among the one or more SL BWPs included in the SL BWP list, wherein the configuration information includes at least one of the information regarding a location, a size, a valid time interval of each of the plurality of SL BWPs, and combinations thereof. ### Claim 2 (depends on 1) The operation method according to claim 1, wherein the one or more SL BWPs included in the SL BWP list are selected from a plurality of SL BWPs configured by the first terminal and the plurality of SL BWPs configured by the second terminal. ### Claim 3 (depends on 1) The operation method according to claim 1, wherein the default SL BWP is configured by a base station through a combination of one or more of radio resource control (RRC) signaling, medium access control (MAC) layer signaling, and physical (PHY) layer signaling. ### Claim 4 (depends on 1) The operation method according to claim 1, wherein the initial SL BWP is determined by the first terminal, and configuration information of the initial SL BWP is transmitted to the second terminal together with the SL BWP list. ### Claim 5 (depends on 1) The operation method according to claim 1, wherein the plurality of SL BWPs belong to candidate SL BWPs configured by a base station. ### Claim 6 (depends on 1) The operation method according to claim 1, wherein the SL communication is performed within a valid time interval in which the initial SL BWP is valid. ### Claim 7 (depends on 1) The operation method according to claim 1, further comprising: when characteristics of the SL communication between the first terminal and the second terminal satisfy one or more conditions, determining, by the processor, that switching of the initial SL BWP is necessary; selecting, by the processor, a new SL BWP in the SL BWP list; transmitting, by the processor, a switching request message including configuration information of the new SL BWP to the second terminal; and performing, by the processor, the SL communication with the second terminal using the new SL BWP. ### Claim 8 (depends on 7) The operation method according to claim 7, wherein the one or more conditions include: a valid time interval of the initial SL BWP expiring, a use of a transmission scheme different from a transmission scheme supported by the initial SL BWP is required, a quality of the SL communication in the initial SL BWP is less than or equal to a preconfigured threshold, a use of a SL BWP having a bandwidth different from a bandwidth of the initial SL BWP is required, and a zone to which at least one of the first terminal and the second terminal belongs is different from a zone associated with the initial SL BWP. ### Claim 9 (depends on 7) The operation method according to claim 7, wherein when the SL communication is completed in the new SL BWP, the new SL BWP is switched to the default SL BWP or the initial SL BWP. ### Claim 10 An operation method of a second terminal in a communication system, comprising: receiving, at a processor from a first terminal, configuration information of a plurality of sidelink (SL) bandwidth parts (BWPs) configured by the first terminal through a default SL BWP; configuring, by the processor, a candidate SL BWP list including one or more SL BWPs based on a plurality of SL BWPs configured by the second terminal and the plurality of SL BWPs configured by the first terminal; transmitting, by the processor, the candidate SL BWP list to the first terminal via the default SL BWP; receiving, by the processor, a final SL BWP list determined based on the candidate SL BWP list and configuration information of an initial SL BWP from the first terminal via the default SL BWP; and performing, by the processor, SL communication with the first terminal using the initial SL BWP. ### Claim 11 (depends on 10) The operation method according to claim 10, wherein the configuration information of the plurality of SL BWPs includes one or more of information regarding a location, a size, and a valid time interval of each of the plurality of SL BWPs. ### Claim 12 (depends on 10) The operation method according to claim 10, wherein the default SL BWP is configured by a base station through a combination of one or more of radio resource control (RRC) signaling, medium access control (MAC) layer signaling, and physical (PHY) layer signaling. ### Claim 13 (depends on 10) The operation method according to claim 10, further comprising: when characteristics of the SL communication between the first terminal and the second terminal satisfy one or more conditions, determining, by the processor, that switching of the initial SL BWP is necessary; selecting, by the processor, a new SL BWP in the SL BWP list; transmitting, by the processor, a switching request message including configuration information of the new SL BWP to the first terminal; and performing, by the processor, the SL communication with the first terminal using the new SL BWP. ### Claim 14 (depends on 13) The operation method according to claim 13, wherein when the SL communication is completed in the new SL BWP, the new SL BWP is switched to the default SL BWP or the initial SL BWP. ### Claim 15 A first terminal in a communication system, the first terminal including a processor and a memory configured to store at least one instruction executable by the processor, wherein the at least one instruction causes the processor to: configure a plurality of sidelink (SL) bandwidth parts (BWPs) used for SL communication between the first terminal and a second terminal; receive a candidate SL BWP list including at least one SL BWP configured by the second terminal from the second terminal via a default SL BWP; transmit a final SL BWP list including one or more SL BWPs among the plurality of SL BWPs and the at least one SL BWP included in the candidate SL BWP list to the second terminal through the default SL BWP; and perform SL communication with the second terminal using an initial SL BWP among the one or more SL BWPs included in the final SL BWP list. ### Claim 16 (depends on 15) The first terminal according to claim 15, wherein configuration information of the plurality of SL BWPs is exchanged between the first terminal and the second terminal via the default SL BWP, and the configuration information includes one or more of information regarding a location, a size, and a valid time interval of each of the plurality of SL BWPs. ### Claim 17 (depends on 15) The first terminal according to claim 15, wherein the initial SL BWP is determined by the first terminal, and configuration information of the initial SL BWP is transmitted to the second terminal together with the final SL BWP list. ### Claim 18 (depends on 15) The first terminal according to claim 15, wherein the at least one instruction further causes the processor to: receive a switching request message from the second terminal, the switching request message including configuration information of a new SL BWP selected in the final SL BWP list; transmit a switching response message to the second terminal, the switching response message indicating completion of configuration of the new SL BWP; and perform the SL communication with the second terminal using the new SL BWP. ### Claim 19 (depends on 15) The first terminal according to claim 15, wherein when the SL communication is completed in a new SL BWP, the new SL BWP is switched to the default SL BWP or the initial SL BWP. ### Claim 20 An operation method of a first terminal in a communication system, comprising: configuring, by a processor, a plurality of sidelink (SL) bandwidth parts (BWPs) used for SL communication between the first terminal and a second terminal; transmitting, by the processor, an SL BWP list including one or more SL BWPs among the plurality of SL BWPs to the second terminal via a default SL BWP; and performing, by the processor, SL communication with the second terminal using an initial SL BWP among the one or more SL BWPs included in the SL BWP list, wherein the initial SL BWP is determined by the first terminal, and configuration information of the initial SL BWP is transmitted to the second terminal together with the SL BWP list.