# US 2020/0404646 A1 · Slot Format Indication Method, Device, and System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0404646 A1 - Document ID: US20200404646A1 - Status: Published application - Kind: A1 - Application number: 17/011,320 - Filed: 2020-09-03 - Published: 2020-12-24 - Earliest claimed: 2018-03-09 - Applicants: Huawei Technologies Co., Ltd. - Inventors: Lili Zhang; Xingwei Zhang - Web page: https://patentgrep.com/patent/US20200404646A1 ## CPC - H04W 72/51: based on terminal or device properties - H04B 7/2643: {using time-division multiple access [TDMA] (H04B7/2615, H04B7/2618 take precedence)} - H04W 4/08: User group management - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A slot format indication method, a device, and a system, the method including obtaining, by a first user equipment (UE), first downlink control information (DCI), the first DCI having first slot format indication (SFI) and at least one second SFI, the first SFI being an SFI of the first UE or of a group of the first UE, and the second SFI being an SFI of a second UE paired with the first UE of a group of the second UE, obtaining, by the first UE, the first SFI and the at least one second SFI from the first DCI according to first indication information indicating a location of the first SFI in the first DCI and indicating a location of the at least one second SFI in the first DCI, and determining, according to the first SFI and at least one second SFI, to perform full-duplex communication. ## Claims ### Claim 1 A slot format indication method, comprising: obtaining, by a first user equipment (UE), first downlink control information (DCI), wherein the first DCI comprises first slot format indication (SFI) and at least one second SFI, wherein the first SFI is at least one of an SFI of the first UE or an SFI of a group in which the first UE is disposed, and wherein the second SFI is at least one of an SFI of second UE paired with the first UE or an SFI of a group in which the second UE is disposed; obtaining, by the first UE, the first SFI and the at least one second SFI from the first DCI according to first indication information, wherein the first indication information indicates a location of the first SFI in the first DCI and further indicates a location of the at least one second SFI in the first DCI; and determining, by the first UE according to the first SFI and the at least one second SFI, to perform full-duplex communication. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first indication information comprises at least one of a correspondence between the UE and a location of an SFI of the UE in the first DCI, or a correspondence between a group in which UE is disposed and a location of an SFI of the group in which the UE is disposed in the first DCI. ### Claim 3 (depends on 1) The method according to claim 1, wherein the first indication information comprises a first correspondence and a second correspondence; wherein the first correspondence is a correspondence between the location of the first SFI in the first DCI and at least one of the first UE or the group in which the first UE is disposed; and wherein the second correspondence is a correspondence between the location of the first SFI in the first DCI and the location of the at least one second SFI in the first DCI, or a correspondence between the first UE and the location of the at least one second SFI in the first DCI. ### Claim 4 (depends on 3) The method according to claim 3, wherein the first SFI is at least one of located in at least one of an odd-numbered position with the at least one second SFI located in an even-numbered position, or located at an even-numbered position with the at least one second SFI located at an odd-numbered position. ### Claim 5 (depends on 1) The method according to claim 1, wherein an SFI of the first DCI is carried in an SFI field in the first DCI, and wherein the SFI field further carries at least one of: an identifier of the UE corresponding to the SFI, wherein the first indication information comprises an identifier of the first UE and an identifier of the second UE; or an identifier of a group in which the UE corresponding to the SFI is disposed, wherein the first indication information comprises an identifier of the group in which the first UE is disposed and an identifier of the group in which the second UE is disposed. ### Claim 6 (depends on 1) The method according to claim 1, wherein the first indication information comprises a correspondence between the first UE or the group in which the first UE is and the location of the first SFI in the first DCI; and wherein the obtaining the first SFI and the at least one second SFI from the first DCI based comprises obtaining, by the first UE, the first SFI according to the correspondence, and using an SFI other than the first SFI in the first DCI as the at least one second SFI. ### Claim 7 (depends on 1) The method according to claim 1, wherein the obtaining the first DCI comprises: parsing, by the first UE, according to a radio network temporary identifier (RNTI) of the first UE, at least one piece of DCI delivered by an access network device; and using a successfully parsed DCI as the first DCI, wherein at least one piece of DCI comprises the first DCI. ### Claim 8 (depends on 1) The method according to claim 1, wherein an SFI of the first DCI corresponds to at least one of a carrier of the UE corresponding to the SFI, or to a carrier of a group in which the UE corresponding to the SFI is disposed. ### Claim 9 (depends on 1) The method according to claim 1, wherein the first indication information is delivered to the first UE by an access network device, or is pre-configured on the first UE. ### Claim 10 (depends on 9) The method according to claim 9, wherein the first indication information is carried in at least one of radio resource control (RRC) signaling, media access control (MAC) layer signaling, or physical layer signaling, and wherein the first indication information is delivered to the first UE. ### Claim 11 A first user equipment (UE), comprising: a processor; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to: obtain first downlink control information (DCI), wherein the first DCI comprises a first slot format indication (SFI) and at least one second SFI, wherein the first SFI is an SFI of at least one of the first UE or a group in which the first UE is disposed, and wherein the second SFI is an SFI of at least one of a group in which the second UE is disposed or a second UE paired with the first UE; and obtain the first SFI and the at least one second SFI from the first DCI according to first indication information, wherein the first indication information indicates a location of the first SFI in the first DCI and further indicates a location of the at least one second SFI in the first DCI; and determine, according to the first SFI and the at least one second SFI that are obtained by the obtaining unit, to perform full-duplex communication. ### Claim 12 (depends on 11) The first UE according to claim 11, wherein the first indication information comprises a correspondence between at least one of the first UE and a location of an SFI of the first UE in the first DCI, or between a group in which first UE is disposed and a location in the first DCI of an SFI of the group in which the UE is disposed. ### Claim 13 (depends on 11) The first UE according to claim 11, wherein the first indication information comprises a first correspondence and a second correspondence; wherein the first correspondence is a correspondence between the location of the first SFI in the first DCI and at least one of the first UE or the group in which the first UE is disposed; and wherein the second correspondence is a correspondence between the location of the first SFI in the first DCI and the location of the at least one second SFI in the first DCI, or a correspondence between the first UE and the location of the at least one second SFI in the first DCI. ### Claim 14 (depends on 13) The first UE according to claim 13, wherein the first SFI is located at at least one of an odd-numbered position with the at least one second SFI located in an even-numbered position, or at an even-numbered position with the at least one second SFI located at an odd-numbered position. ### Claim 15 (depends on 11) The first UE according to claim 11, wherein an SFI of the first DCI is carried in an SFI field in the first DCI, and wherein the SFI field further carries at least one of: an identifier of the UE corresponding to the SFI, wherein the first indication information comprises an identifier of the first UE and an identifier of the second UE; or an identifier of a group in which the UE corresponding to the SFI is disposed, wherein the first indication information comprises an identifier of the group in which the first UE is disposed and an identifier of the group in which the second UE is disposed. ### Claim 16 (depends on 11) The first UE according to claim 11, wherein the first indication information comprises a correspondence between the first UE or the group in which the first UE is and the location of the first SFI in the first DCI; and wherein the instructions to obtain the first SFI and the at least one second SFI include instructions to obtain the first SFI according to the correspondence, and using an SFI other than the first SFI in the first DCI as the at least one second SFI. ### Claim 17 (depends on 11) The first UE according to claim 11, wherein the instructions to obtain the first SFI and the at least one second SFI include instructions to: parse, according to a radio network temporary identifier (RNTI) of the first UE, at least one piece of DCI delivered by an access network device; and use a successfully parsed DCI as the first DCI, wherein at least one DCI comprises the first DCI. ### Claim 18 (depends on 11) The first UE according to claim 11, wherein an SFI of the first DCI corresponds to at least one of a carrier of UE corresponding to the SFI, or a carrier of a group in which the UE corresponding to the SFI is disposed. ### Claim 19 (depends on 11) The first UE according to claim 11, wherein the first indication information is at least one of delivered to the first UE by an access network device and is carried in at least one of radio resource control (RRC) signaling, media access control (MAC) layer signaling, or physical layer signaling, or is pre-configured on the first UE. ### Claim 20 A computer storage medium, storing a computer program for execution by a processor of a first user equipment (UE), the computer program including instructions that, when executed, cause the processor to perform: obtaining first downlink control information (DCI), wherein the first DCI comprises first slot format indication (SFI) and at least one second SFI, wherein the first SFI is at least one of an SFI of the first UE or an SFI of a group in which the first UE is disposed, and wherein the second SFI is at least one of an SFI of second UE paired with the first UE or an SFI of a group in which the second UE is disposed; obtaining the first SFI and the at least one second SFI from the first DCI according to first indication information, wherein the first indication information indicates a location of the first SFI in the first DCI and further indicates a location of the at least one second SFI in the first DCI; and determining, according to the first SFI and the at least one second SFI, to perform full-duplex communication.