# US 11,310,822 B2 · Methods and apparatus for sidelink communications and resource allocation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,822 B2 - Document ID: US11310822B2 - Status: Granted - Kind: B2 - Application number: 16/669,715 - Filed: 2019-10-31 - Published: 2020-05-07 - Granted: 2022-04-19 - Earliest claimed: 2018-11-02 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Amine Maaref; Yu Cao; Jianglei Ma - Web page: https://patentgrep.com/patent/US11310822B2 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 92/18: between terminal devices - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] - H04W 4/46: for vehicle-to-vehicle communication [V2V] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods and systems are provided in which a UE transmits sidelink (SL) control information comprising a scheduling assignment (SA) indicating an SL transmission resource for a SL data transmission to a target UE. The SL transmission resource is based on one or more occupied SL resources identified by the UE and the SL transmission resource includes resources for an initial transmission and one or more retransmissions. The UE then transmits the SL data transmission using the SL transmission resource according to the transmitted SL control information. This is done without receiving, in a downlink control information (DCI), a grant of communication resources. ## Claims ### Claim 1 A method, comprising: transmitting, by a user equipment (UE) to a target UE, sidelink (SL) control information comprising a scheduling assignment (SA) indicating SL transmission resources for a SL data transmission, the SL transmission resources based on one or more occupied SL resources sensed by the UE, and the SL transmission resources including a first resource in a resource pool for an initial transmission and multiple different resources in the resource pool for one or more retransmissions, wherein the first resource includes a first time resource, a first frequency resource, or a first time-frequency resource, and wherein the multiple different resources include multiple time resources, multiple frequency resources, or multiple time-frequency resources; and transmitting, by the UE, the SL data transmission using the SL transmission resources according to the SL control information transmitted by the UE, wherein the SL control information and the SL data transmission are transmitted by the UE without receiving, in a downlink control information (DCI), a grant of communication resources. ### Claim 2 (depends on 1) The method of claim 1, further comprising: sensing a SL transmission involving another UE to identify the one or more occupied SL resources. ### Claim 3 (depends on 2) The method of claim 2, wherein the sensing the SL transmission involving the another UE comprises at least one of: decoding an SL control channel transmitted by the another UE to identify a transmission resource scheduled or reserved for the another UE; or measuring the SL transmission resources, wherein the measuring the SL transmission resources comprises: measuring physical sidelink shared channel (PSSCH) resources indicated or reserved for transmission by a sidelink control information transmitted by the another UE. ### Claim 4 (depends on 3) The method of claim 3, further comprising: selecting the SL transmission resources by avoiding selecting the transmission resource scheduled for the another UE or wherein a measurement result of the measuring is above a threshold. ### Claim 5 A user equipment (UE), comprising: at least one processor; and a non-transitory computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions for: transmitting, to a target UE, sidelink (SL) control information comprising a scheduling assignment (SA) indicating SL transmission resources for a SL data transmission, the SL transmission resources based on one or more occupied SL resources sensed by the UE, and the SL transmission resources including a first resource in a resource pool for an initial transmission and multiple different resources in the resource pool for one or more retransmissions, wherein the first resource includes a first time resource, a first frequency resource, or a first time-frequency resource, and wherein the multiple different resources include multiple time resources, multiple frequency resources, or multiple time-frequency resources; and transmitting the SL data transmission using the SL transmission resources according to the SL control information transmitted by the UE, wherein the SL control information and the SL data transmission are transmitted by the UE without receiving, in a downlink control information (DCI), a grant of communication resources. ### Claim 6 (depends on 5) The UE of claim 5, wherein the programming further includes instructions for: sensing a SL transmission involving another UE to identify the one or more occupied SL resources. ### Claim 7 (depends on 6) The UE of claim 6, wherein the sensing the SL transmission involving the another UE comprises at least one of: decoding an SL control channel transmitted by the another UE to identify a transmission resource scheduled or reserved for the another UE; or measuring the SL transmission resources, wherein the measuring the SL transmission resources comprises: measuring physical sidelink shared channel (PSSCH) resources indicated or reserved for transmission by a sidelink control information transmitted by the another UE. ### Claim 8 (depends on 7) The UE of claim 7, wherein the programming further includes instructions for: selecting the SL transmission resources by avoiding selecting the transmission resource scheduled for the another UE or wherein a measurement result of the measuring is above a threshold. ### Claim 9 A method, comprising: receiving, by a user equipment (UE) from a base station, a message indicating multiple sidelink (SL) communication resource configurations to be used by the UE for communicating SL control information and SL data between the UE and another UE; transmitting, by the UE, the SL control information to the another UE using a communication resource indicated by a SL communication resource configuration of the multiple SL communication resource configurations; and transmitting, by the UE, the SL data to the another UE using the communication resource indicated by the SL communication resource configuration, wherein the SL control information and the SL data are transmitted by the UE without the UE receiving, in a downlink control information (DCI), a grant of the communication resource. ### Claim 10 (depends on 9) The method of claim 9, further comprising: selecting, by the UE, the SL communication resource configuration from the multiple SL communication resource configurations indicated to the UE. ### Claim 11 (depends on 9) The method of claim 9, wherein the message indicating the multiple SL communication resource configurations indicates a resource pool configuration including the multiple SL communication resource configurations. ### Claim 12 (depends on 9) The method of claim 9, wherein the communication resource comprises a time slot and a frequency sub-channel, and wherein the SL communication resource configuration indicates the time slot and the frequency sub-channel for transmitting the SL data and the SL control information. ### Claim 13 (depends on 9) The method of claim 9, wherein the SL communication resource configuration comprises an indication of a tune domain offset of the communication resource with respect to a first system frame number (SFN o). ### Claim 14 (depends on 9) The method of claim 9, wherein the SL communication resource configuration comprises an indication of a periodicity of the communication resource. ### Claim 15 (depends on 14) The method of claim 14, wherein the SL communication resource configuration indicates a plurality of communication resources within a time window, each of the plurality of communication resources comprising a combination of one time slot and one or more frequency sub-channels, and wherein the periodicity is a periodicity of the plurality of communication resources. ### Claim 16 (depends on 15) The method of claim 15, wherein the SL communication resource configuration further indicates the time slot of the communication resource in the time window. ### Claim 17 (depends on 15) The method of claim 15, wherein the transmitting the SL data to the another UE using the communication resource indicated by the SL communication resource configuration comprises: transmitting the SL data in a first transmission according to a first communication resource of the plurality of communication resources and transmitting the SL data in a second transmission according to a second communication resource of the plurality of communication resources. ### Claim 18 (depends on 9) The method of claim 9, wherein the message indicating the multiple SL communication resource configurations is a radio resource control (RRC) message. ### Claim 19 (depends on 9) The method of claim 9, wherein the SL control information further indicates a redundancy version, a source ID, and a destination ID of transmission of the SL data. ### Claim 20 (depends on 9) The method of claim 9, wherein the SL control information indicates the communication resource used for transmitting the SL data. ### Claim 21 (depends on 20) The method of claim 20, wherein the SL communication resource configuration comprises an indication of a number of symbols, an indication of a starting resource block (RB), and an indication of a number of RBs, for defining the communication resource for transmitting the SL control information to the another UE. ### Claim 22 A user equipment (UE), comprising: at least one processor; and a non-transitory computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions to: receive, from a base station, a message indicating multiple sidelink (SL) communication resource configurations to be used by the UE for communicating SL control information and SL data between the UE and another UE; transmit the SL control information to the another apparatus LIE using a communication resource indicated by a SL communication resource configuration of the multiple SL communication resource configurations; and transmit the SL data to the another UE using the communication resource indicated by the SL communication resource configuration, wherein the SL control information and the SL data are transmitted by the UE without the UE receiving, in a downlink control information (DCI), a grant of the communication resource. ### Claim 23 (depends on 22) The UE of claim 22, the programming further including instructions to: select the SL communication resource configuration from the multiple SL communication resource configurations indicated to the UE. ### Claim 24 (depends on 22) The UE of claim 22, wherein the message indicating the multiple SL communication resource configurations indicates a resource pool configuration including the multiple SL communication resource configurations. ### Claim 25 (depends on 22) The UE of claim 22, wherein the communication resource comprises a time slot and a frequency sub-channel, and wherein the SL communication resource configuration indicates the time slot and the frequency sub-channel for transmitting the SL data and the SL control information. ### Claim 26 (depends on 22) The UE of claim 22, wherein the SL communication resource configuration comprises an indication of a time domain offset of the communication resource with respect to a first system frame number (SIN o). ### Claim 27 (depends on 22) The UE of claim 22, wherein the SL communication resource configuration comprises an indication of a periodicity of the communication resource. ### Claim 28 (depends on 27) The UE of claim 27, wherein the SL communication resource configuration indicates a plurality of communication resources within a time window, each of the plurality of communication resources comprising a combination of one time slot and one or more frequency sub-channels, and wherein the periodicity is a periodicity of the plurality of communication resources. ### Claim 29 (depends on 28) The UE of claim 28, wherein the SL communication resource configuration further indicates the time slot of the communication resource in the time window. ### Claim 30 (depends on 28) The UE of claim 28, wherein the instructions to transmit the SL data to the another UE using the communication resource indicated by the SL communication resource configuration comprise instructions to: transmit the SL data in a first transmission according to a first communication resource of the plurality of communication resources and transmitting the SL data in a second transmission according to a second communication resource of the plurality of communication resources. ### Claim 31 (depends on 22) The UE of claim 22, wherein the message indicating the multiple SL communication resource configurations is a radio resource control (RRC) message. ### Claim 32 (depends on 22) The UE of claim 22, wherein the SL control information further indicates a redundancy version, a source ID, and a destination ID of transmission of the SL data. ### Claim 33 (depends on 22) The UE of claim 22, wherein the SL control information indicates the communication resource used for transmitting the SL data. ### Claim 34 (depends on 33) The UE of claim 33, wherein the SL communication resource configuration comprises an indication of a number of symbols, an indication of a starting resource block (RB), and an indication of a number of RBs, for defining the communication resource for transmitting the SL control information to the another UE.