# US 11,445,478 B2 · Systems and methods for adapting parameters in sidelink communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,478 B2 - Document ID: US11445478B2 - Status: Granted - Kind: B2 - Application number: 16/784,057 - Filed: 2020-02-06 - Published: 2020-06-04 - Granted: 2022-09-13 - Earliest claimed: 2017-08-11 - Assignees: Zte Corporation - Applicants: Zte Corporation - Inventors: Ying Huang; Mengzhen Wang; Lin Chen - Web page: https://patentgrep.com/patent/US11445478B2 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04W 76/23: Manipulation of direct-mode connections - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 27/362: {Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated (H04L27/366 takes precedence)} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 72/0473: {the resource being transmission power} - H04W 76/11: Allocation or use of connection identifiers - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 80/02: Data link layer protocols - H04W 92/18: between terminal devices - Y02D 30/70: in wireless communication networks - 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) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Systems and methods for adapting parameters in wireless sidelink communications are disclosed herein. In one embodiment, a method performed by a first node is disclosed. The method comprises: transmitting a wireless signal to a second node; and receiving a control signal from the second node, wherein the control signal is generated by the second node based on the wireless signal and includes information for controlling sidelink communication between the first node and at least one third node. ## Claims ### Claim 1 A method performed by a first node, the method comprising: transmitting a wireless signal to a second node, wherein the wireless signal is related to sidelink communication between the first node and at least one third node, and the wireless signal carries information that comprises: identity information for the at least one third node, resource allocation request indication, a ratio between a total number of acknowledgements received from the at least one third node and a total number of sidelink transmissions to the at least one third node from the first node during a certain time period, and sizes of requested resources; and receiving a control signal from the second node, wherein the control signal is generated by the second node based on the wireless signal and includes information for controlling the sidelink communication between the first node and the at least one third node. ### Claim 2 (depends on 1) The method of claim 1, wherein the wireless signal is generated based on feedback information received by the first node from the at least one third node that performs sidelink communication with the first node. ### Claim 3 (depends on 2) The method of claim 2, wherein the wireless signal further carries information that comprises: the feedback information received from the at least one third node. ### Claim 4 (depends on 2) The method of claim 2, wherein the feedback information includes at least one of: one or more process numbers each of which identifies a HARQ (Hybrid Automatic Repeat Request) process for the sidelink communication between the first node and the at least one third node; or acknowledgement or negative acknowledgement information for the corresponding HARQ process. ### Claim 5 (depends on 1) The method of claim 1, wherein the wireless signal further carries information that comprises at least one of the following: retransmission indication; feedback information generated by the first node for the sidelink communication between the first node and the at least one third node; or a ratio between a total number of acknowledgements received from the at least one third node and a total number of sidelink transmissions to the at least one third node during a certain time period. ### Claim 6 (depends on 1) The method of claim 1, wherein: the wireless signal is transmitted via at least one of: (a) radio resource control (RRC) signaling, or (b) media access control (MAC) control element (CE) with logical channel identity (LCD) that indicates a type of the MAC CE; and the control signal is received via at least one of: RRC signaling, MAC CE, and physical downlink control channel (PDCCH). ### Claim 7 (depends on 1) The method of claim 1, wherein the control signal comprises at least one of the following information: transmit power of the sidelink communication; maximum transmit power of the sidelink communication; communication resource for the sidelink communication; transmission resource pool for the sidelink communication; MCS (Modulation and Coding Scheme) for the sidelink communication; modulation order for the sidelink communication; retransmission number; or maximum retransmission number. ### Claim 8 (depends on 1) The method of claim 1, further comprising: determining a modulation scheme to be used in the sidelink communication based on the control signal. ### Claim 9 (depends on 8) The method of claim 8, further comprising: transmitting category information to the second node, wherein the category information indicates one or more modulation schemes supported by the first node in a sidelink communication. ### Claim 10 (depends on 8) The method of claim 8, wherein: the determined modulation scheme is 64 quadrature amplitude modulation (QAM) to be used on a physical sidelink shared channel (PSSCH); and the control signal indicates whether usage of 64QAM on the PSSCH is enabled. ### Claim 11 (depends on 8) The method of claim 8, wherein: the control signal carries threshold information; and the modulation scheme to be used in the sidelink communication is determined by comparing the threshold information with at least one of: a size of data to be transmitted in the sidelink communication, channel quality of the sidelink communication, a transmission range requirement for the data to be transmitted in the sidelink communication, absolute speed of the first node, or relative speed of the first node. ### Claim 12 (depends on 8) The method of claim 8, further comprising transmitting assistance information about sidelink communication between the first node and the at least one third node to the second node, wherein: the assistance information is received from the at least one third node or generated by the first node; and the assistance information is utilized by the second node to determine the modulation scheme to be used in the sidelink communication. ### Claim 13 (depends on 12) The method of claim 12, wherein the assistance information comprises at least one of: speed of the first node, speed of the at least one third node, acceleration of the first node, acceleration of the at least one third node, movement direction of the first node, movement direction of the at least one third node, sidelink measurement information of the sidelink communication, MCS related information, times of retransmission, or transmission resource information. ### Claim 14 A method performed by a first node, the method comprising: receiving a wireless signal from a second node, wherein the wireless signal is related to sidelink communication between the second node and at least one third node, the wireless signal carries information that comprises: identity information for the at least one third node, resource allocation request indication, a ratio between a total number of acknowledgements received from the at least one third node and a total number of sidelink transmissions to the at least one third node from the second node during a certain time period, and sizes of requested resources; generating a control signal based on the wireless signal, wherein the control signal includes information for controlling the sidelink communication between the second node and the at least one third node; and transmitting the control signal to the second node. ### Claim 15 (depends on 14) The method of claim 14, wherein: the wireless signal is generated by the second node based on feedback information; and the feedback information is received by the second node from the at least one third node that performs sidelink communication with the second node. ### Claim 16 (depends on 15) The method of claim 15, wherein the wireless signal further carries information that comprises: the feedback information received from the at least one third node. ### Claim 17 (depends on 15) The method of claim 15, wherein the feedback information includes at least one of: one or more process numbers each of which identifies a HARQ (Hybrid Automatic Repeat Request) process for the sidelink communication between the second node and the at least one third node; or acknowledgement or negative acknowledgement information for the corresponding HARQ process. ### Claim 18 (depends on 14) The method of claim 14, wherein the wireless signal further carries information that comprises at least one of the following: retransmission indication; feedback information generated by the second node for the sidelink communication between the second node and the at least one third node; or a ratio between a total number of acknowledgements received from the at least one third node and a total number of sidelink transmissions to the at least one third node from the second node during a certain time period. ### Claim 19 (depends on 14) The method of claim 14, wherein: the wireless signal is received via at least one of: (a) radio resource control (RRC) signaling, or (b) media access control (MAC) control element (CE) with logical channel identity (LCD) that indicates a type of the MAC CE; and the control signal is transmitted via at least one of: RRC signaling, MAC CE, or physical downlink control channel (PDCCH). ### Claim 20 (depends on 14) The method of claim 14, wherein the control signal comprises at least one of the following information: transmit power of the sidelink communication; maximum transmit power of the sidelink communication; communication resource for the sidelink communication; transmission resource pool for the sidelink communication; MCS (Modulation and Coding Scheme) for the sidelink communication; modulation order for the sidelink communication; retransmission number; or maximum retransmission number.