# US 2021/0243796 A1 · Improved groupcast and unicast in new radio vehicle-to-everything (v2x) communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243796 A1 - Document ID: US20210243796A1 - Status: Published application - Kind: A1 - Application number: 17/270,568 - Filed: 2019-09-26 - Published: 2021-08-05 - Earliest claimed: 2018-09-28 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Sergey Panteleev; Alexey Khoryaev; Mikhail Shilov - Web page: https://patentgrep.com/patent/US20210243796A1 ## CPC - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/1664: {the supervisory signal being transmitted together with payload signals; piggybacking} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1858: {Transmission or retransmission of more than one copy of acknowledgement message} - H04W 8/24: Transfer of terminal data - H04W 72/566: of the information or information source or recipient - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 84/005: {Moving wireless networks} - H04W 92/18: between terminal devices - 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 Systems, methods, and circuitries are provided for enhancing unicast and groupcast communication in a wireless communication system also utilizing broadcast communication. An example apparatus for a user equipment (UE) wireless communication device, including baseband circuitry having a radio frequency (RF) interface configured to transmit and receive RF signals, and one or more processors is provided. The one or more processors are configured to generate a signal encoding one or more capabilities of the UE wireless communication device and transmit the signal to one or more other UE wireless communication devices. ## Claims ### Claim 1 An apparatus for a user equipment (UE) wireless communication device, comprising baseband circuitry having a radio frequency (RF) interface configured to transmit and receive RF signals, and one or more processors configured to: generate a scheduling request (SR) or scheduling grant (SG) encoding one or more capabilities of the UE wireless communication device; and transmit the signal to one or more other UE wireless communication devices. ### Claim at position 2 2-4. (canceled) ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the one or more capabilities include one or more of maximum transmission bandwidth, maximum transmission power, maximum number of supported multiple input multiple output (MIMO) layers, supported transmission durations including slot aggregation, maximum number of hybrid acknowledgement repeat request (HARQ) processes, supported waveform for physical sidelink shared channel (PSSCH), maximum processing and preparation times, maximum reception bandwidth, maximum number of supported RX MIMO layers, supported modulations, supported feedback and link adaption modes, supported transmission modes, or supported V2X transmission profiles. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the signal encodes a profile identifier that identifies a group of capabilities. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the profile identifier identifies a level of capability. ### Claim 8 An apparatus for a first user equipment (UE) wireless communication device, comprising baseband circuitry having a radio frequency (RF) interface configured to transmit and receive RF signals, and one or more processors configured to: transmit a signal encoding data to a second UE wireless communication device; identify a hybrid automatic repeat request (HARQ) process identifier (ID) associated with the signal; determine, based on the HARQ process ID, a feedback signal; monitor for the feedback signal; and selectively re-transmit the signal in response to receiving the feedback signal. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the one or more processors are configured to: transmit the signal in response to receiving a scheduling grant (SG) having a new data indicator (NDI) bit toggled from the second UE wireless device; determine that the HARQ process ID specifies the SG as the feedback signal; and re-transmit the signal in response to receiving a subsequent SG having the NDI bit un-toggled. ### Claim 10 (depends on 8) The apparatus of claim 8, wherein the one or more processors are configured to: determine that the HARQ process ID indicates that feedback is received in a dedicated feedback channel structure comprising resources reserved for the feedback signal; prior to transmitting the signal, transmit a scheduling assignment (SA) to the second UE wireless device that includes information describing the dedicated feedback channel structure; and monitor the dedicated feedback channel structure for the feedback signal. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the dedicated feedback channel structure comprises a physical sidelink feedback channel (PSFCH), further wherein the one or more processors are configured to generate the SA to include information defining a number of symbols, a number of bits per symbol, and a number of slots in the PSFCH for repeating the feedback signal. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein the one or more processors are configured to: determine an offset associated with the HARQ process ID, wherein the offset defines a number of slots with respect to a physical sidelink shared channel (PSSCH); and monitor for the feedback signal at slots occurring after the offset. ### Claim 13 (canceled) ### Claim 14 (canceled) ### Claim 15 (depends on 8) The apparatus of claim 8, wherein the one or more processors are configured to: refrain from re-transmitting the signal in response to not receiving the feedback signal; and re-transmit the signal in response to receiving the feedback signal, wherein the feedback signal comprises a non-acknowledgement (NACK) signal. ### Claim 16 An apparatus for a first user equipment (UE) wireless communication device, comprising baseband circuitry having a radio frequency (RF) interface configured to transmit and receive RF signals, and one or more processors configured to: determine a first set of supported features associated with a first transmit signal; determine a second set of supported features associated with a second transmit signal; determine either a broadcast channel access or a unicast channel access for the first transmit signal based on the first set of supported features; and determine either a broadcast channel access or a unicast channel access for the second transmit signal based on the second set of supported features. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the one or more processors are configured to configure, based on the first set of supported features and the second set of supported features, one or more of an energy/power threshold for reference signal receive power (RSRP) or received signal strength indicator (RSSI), congestion control thresholds for communication range (CR) or channel busy ratio (CBR), sets of parameters for resource allocation, transmission power, modulation coding scheme, resource reservation window, or resource selection window. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the one or more processors are configured to: determine a unicast channel access for the first transmit signal; adapt physical layer parameters in the broadcast channel access to generate an adapted channel access; and transmit the first transmit signal using the adapted channel access. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the one or more processors are configured to: determine a first priority for the first transmit signal based on a channel sensing procedure; determine a second priority for the second transmit signal based on the channel sensing procedure; adjust the first priority based on the first set of supported features; adjust the second priority based on the second set of supported features; and transmit the first transmit signal and the second transmit signal according to the adjusted first priority and the adjusted second priority. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the one or more processors are configured to assign a higher priority to a transmit signal having a set of supported features corresponding to a cellular communication signal as compared to a transmit signal having a set of supported features corresponding to a PC5 communication signal. ### Claim 21 (depends on 19) The apparatus of claim 19, wherein the one or more processors are configured to assign a higher priority to a transmit signal having a set of supported features corresponding to a broadcast PC5 signal as compared to a transmit signal having a set of supported features corresponding to a non-broadcast PC5 signal. ### Claim 22 (depends on 19) The apparatus of claim 19, wherein the one or more processors are configured to: determine a first priority assigned to the first transmit signal, wherein the first set of supported features corresponds to a broadcast signal; determine a second priority assigned to the second transmit signal, wherein the second set of supported features corresponds to a unicast signal; identify a unicast-broadcast threshold associated with the first transmit signal and the second transmit signal; determine whether a difference between the second priority and the first priority exceeds the unicast-broadcast threshold; and prioritize the second transmit signal above the first transmit signal when the difference exceeds the unicast-broadcast threshold. ### Claim 23 (depends on 19) The apparatus of claim 19, wherein the one or more processors are configured to: determine a first priority assigned to the first transmit signal, wherein the first set of supported features corresponds to a broadcast signal; determine a second priority assigned to the second transmit signal, wherein the second set of supported features corresponds to a groupcast signal; identify a groupcast-broadcast threshold associated with the first transmit signal and the second transmit signal; determine whether a difference between the second priority and the first priority exceeds the groupcast-broadcast threshold; and prioritize the second transmit signal above the first transmit signal when the difference exceeds the groupcast-broadcast threshold. ### Claim 24 (depends on 19) The apparatus of claim 19, wherein the one or more processors are configured to: determine a first priority assigned to the first transmit signal, wherein the first set of supported features corresponds to a groupcast signal; determine a second priority assigned to the second transmit signal, wherein the second set of supported features corresponds to a unicast signal; identify a unicast-groupcast threshold associated with the first transmit signal and the second transmit signal; determine whether a difference between the second priority and the first priority exceeds the unicast-groupcast threshold; and prioritize the second transmit signal above the first transmit signal when the difference exceeds the unicast-groupcast threshold. ### Claim 25 (depends on 19) The apparatus of claim 19, wherein the one or more processors are configured to: determine a first priority assigned to the first transmit signal, wherein the first set of supported features corresponds to a groupcast signal; determine a second priority assigned to a receive signal; identify a transmit-receive threshold associated with the first transmit signal and the second transmit signal; determine whether a difference between the second priority and the first priority exceeds the transmit-receive threshold; and prioritize the second transmit signal above the first transmit signal when the difference exceeds the transmit receive threshold.