# US 11,310,851 B2 · GNB coordinated device to device communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,851 B2 - Document ID: US11310851B2 - Status: Granted - Kind: B2 - Application number: 16/829,537 - Filed: 2020-03-25 - Published: 2020-10-29 - Granted: 2022-04-19 - Earliest claimed: 2019-04-23 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jung Ho Ryu; Tao Luo; Tianyang Bai; Kiran Venugopal; Junyi Li; Vasanthan Raghavan - Web page: https://patentgrep.com/patent/US11310851B2 ## CPC - H04B 7/0617: {for beam forming} - H04W 76/14: Direct-mode setup - H04B 7/06954: {Sidelink beam training with support from third instance, e.g. the third instance being a base station} - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 16/28: using beam steering - H04W 72/53: based on regulatory allocation policies - H04W 76/11: Allocation or use of connection identifiers - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Systems and methods establishing and maintain a direct User Equipment to User Equipment communication link in a gNB are disclosed. A gNB may determine that direct UE to UE link should be established in a cell. The gNB may transmit information to a first and second UE to enable a device to device beam search procedure. The first and second UE may perform the beam search and report the result to the gNB. The gNB may determine the appropriate beam for the first and second UE to establish a communication link. ## Claims ### Claim 1 A method of wireless communications at a base station, comprising: determining that a direct link between a first User Equipment (UE) and a second UE should be established; transmitting information to the first UE and the second UE to enable a directional beam search procedure between the first UE and the second UE; and receiving a message from the first UE or the second UE that indicates a result of the directional beam search procedure, wherein the result comprises information associated with at least one of one or more directional transmit or receive beams of the first UE or the second UE used in the directional beam search procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein the information transmitted to the first UE and the second UE indicates that the first UE is a beam search transmitter and the second UE is a beam search receiver. ### Claim 3 (depends on 2) The method of claim 2, wherein the information transmitted to the first and the second UE has resource allocation information. ### Claim 4 (depends on 3) The method of claim 3, wherein the resource allocation information includes a random access channel resource, a physical downlink shared channel resource, or a physical uplink shared channel resource. ### Claim 5 (depends on 1) The method of claim 1, wherein the information includes a number or ID of a transmit or receive beams to be used in the directional beam search procedure. ### Claim 6 (depends on 5) The method of claim 5, further comprising transmitting information to the first UE and the second UE about which beams to use for UE to UE communication. ### Claim 7 (depends on 1) The method of claim 1, further comprising transmitting information about a subsequent periodic or aperiodic or semi-persistent beam search. ### Claim 8 (depends on 1) The method of claim 1, further comprising receiving information from the first UE or the second UE that indicates a beam failure has occurred. ### Claim 9 (depends on 1) The method of claim 1, further comprising receiving a request from the first UE or the second UE for an additional directional beam search procedure. ### Claim 10 An apparatus for wireless communications at a base station, comprising: a processor adapted to determine that a direct link between a first User Equipment (UE) and a second UE should be established; a transmitter adapted to transmit information to the first UE and the second UE to enable a directional beam search procedure between the first UE and the second UE; and a receiver adapted to receive a message from the first UE or the second UE that indicates a result of the directional beam search procedure, wherein the result comprises information associated with at least one of one or more directional transmit or receive beams of the first UE or the second UE used in the directional beam search procedure. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the information transmitted to the first UE and the second UE indicates that the first UE is a beam search transmitter and the second UE is a beam search receiver. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the information transmitted to the first and the second UE has resource allocation information. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the resource allocation information includes a random access channel resource, a physical downlink shared channel resource, or a physical uplink shared channel resource. ### Claim 14 (depends on 10) The apparatus of claim 10, wherein the information includes a number or ID of a transmit or receive beams to be used in the directional beam search procedure. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the transmitter is further adapted to transmit information to the first UE and the second UE about which beams to use for UE to UE communication. ### Claim 16 (depends on 10) The apparatus of claim 10, wherein the transmitter is further adapted to transmit information about a subsequent periodic or aperiodic or semi-persistent beam search. ### Claim 17 (depends on 10) The apparatus of claim 10, wherein the receiver is further adapted to receive information from the first UE or the second UE that indicates a beam failure has occurred. ### Claim 18 (depends on 10) The apparatus of claim 10, wherein the receiver is further adapted to receive a request from the first UE or the second UE for an additional directional beam search procedure. ### Claim 19 An apparatus for wireless communications at a base station, comprising: means for determining that a direct link between a first User Equipment (UE) and a second UE should be established; means for transmitting information to the first UE and the second UE to enable a directional beam search procedure between the first UE and the second UE; and means for receiving a message from the first UE or the second UE that indicates a result of the directional beam search procedure, wherein the result comprises information associated with at least one of one or more directional transmit or receive beams of the first UE or the second UE used in the directional beam search procedure. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the information transmitted to the first UE and the second UE indicates that the first UE is a beam search transmitter and the second UE is a beam search receiver. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the information transmitted to the first and the second UE has resource allocation information. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the resource allocation information includes a random access channel resource, a physical downlink shared channel resource or a physical uplink shared channel resource. ### Claim 23 (depends on 19) The apparatus of claim 19, wherein the information includes a number or ID of a transmit or receive beams to be used in the directional beam search procedure. ### Claim 24 (depends on 23) The apparatus of claim 23, further comprising means for transmitting information to the first UE and the second UE about which beams to use for UE to UE communication. ### Claim 25 (depends on 19) The apparatus of claim 19, further comprising means for transmitting information about a subsequent periodic or aperiodic or semi-persistent beam search. ### Claim 26 (depends on 19) The apparatus of claim 19, further comprising means for receiving information from the first UE or the second UE that indicates a beam failure has occurred. ### Claim 27 A non-transitory computer-readable medium storing code for wireless communications at a base station, the code comprising instructions executable by a processor to: determine that a direct link between a first User Equipment (UE) and a second UE should be established; transmit information to the first UE and the second UE to enable a directional beam search procedure between the first UE and the second UE; and receive a message from the first UE or the second UE that indicates a result of the directional beam search procedure, wherein the result comprises information associated with at least one of one or more directional transmit or receive beams of the first UE or the second UE used in the directional beam search procedure.