# US 10,873,978 B2 · Beam based random access > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,978 B2 - Document ID: US10873978B2 - Status: Granted - Kind: B2 - Application number: 16/381,743 - Filed: 2019-04-11 - Published: 2019-08-22 - Granted: 2020-12-22 - Earliest claimed: 2016-10-12 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Petteri Kela; Mario Costa - Web page: https://patentgrep.com/patent/US10873978B2 ## CPC - H04W 74/0841: {with collision treatment} - H04B 7/0408: using two or more beams, i.e. beam diversity - H04L 5/0026: {Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 40/244: {using a network of reference devices, e.g. beaconing} - H04W 68/005: {Transmission of information for alerting of incoming communication} - H04W 72/046: {the resource being in the space domain, e.g. beams} - 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 - H04W 76/11: Allocation or use of connection identifiers - H04W 76/27: Transitions between radio resource control [RRC] states - H04B 7/0413: MIMO systems - H04B 7/0617: {for beam forming} - 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 network node for a wireless communication system includes a processor and a transceiver. The processor is configured to generate a plurality of random access grant signals. The random access grant signals include at least one unoccupied radio network temporary identifier and a resource allocation for an uplink communication request. The plurality of random access grant signals are assigned to one or more downlink transmit beams and the transceiver is configured to periodically transmit the plurality of random access grant signals on the one or more downlink transmit beams using a same time-frequency resource. ## Claims ### Claim 1 A network node for a wireless communication system, comprising: a processor configured to: generate a plurality of random access grant signals, the random access grant signals including: at least one unoccupied radio network temporary identifier; and a resource allocation for an uplink communication request; and assign two or more random access grant signals of the plurality of random access grant signals to each of one or more downlink transmit beams; and a transceiver configured to periodically transmit the two or more random access grant signals of the plurality of random access grant signals on each of the one or more downlink transmit beams using a same time-frequency resource. ### Claim 2 (depends on 1) The network node according to claim 1 wherein the processor is configured to map different radio network temporary identifiers to different random access grant signals. ### Claim 3 (depends on 2) The network node according to claim 2, wherein the processor is configured to employ one or more code-sequences to broadcast the plurality of random access grant signals. ### Claim 4 (depends on 2) The network node according to claim 2, wherein the processor is configured to randomize a beam angle offset applied to the one or more downlink transmit beams. ### Claim 5 (depends on 2) The network node according to claim 2, wherein the processor is configured to code multiplex the plurality of random access grant signals, wherein codes mapped to different random access grant signals are orthogonal to each other. ### Claim 6 (depends on 1) The network node according to claim 1, wherein the processor is configured to employ one or more code-sequences to broadcast the plurality of random access grant signals. ### Claim 7 (depends on 6) The network node according to claim 6, wherein the processor is configured to randomize a beam angle offset applied to the one or more downlink transmit beams. ### Claim 8 (depends on 6) The network node according to claim 6, wherein the processor is configured to code multiplex the plurality of random access grant signals, wherein codes mapped to different random access grant signals are orthogonal to each other. ### Claim 9 (depends on 1) The network node according to claim 1, wherein the processor is configured to randomize a beam angle offset applied to the one or more downlink transmit beams. ### Claim 10 (depends on 9) The network node according to claim 9, wherein the processor is configured to code multiplex the plurality of random access grant signals, wherein codes mapped to different random access grant signals are orthogonal to each other. ### Claim 11 (depends on 1) The network node according to claim 1, wherein the processor is configured to code multiplex the plurality of random access grant signals, wherein codes mapped to different random access grant signals are orthogonal to each other. ### Claim 12 (depends on 11) The network node according to claim 11, wherein the processor is configured to map each code multiplexed random access grant signal to the one or more downlink transmit beams. ### Claim 13 (depends on 1) The network node according to claim 1, wherein the processor is configured to include an uplink reference signal request in each random access grant signal. ### Claim 14 (depends on 1) The network node according to claim 1, wherein the processor is configured to include a paging message in each random access grant signal. ### Claim 15 (depends on 1) The network node according to claim 1, wherein the processor is configured to include a system information (SI) modification flag in each random access grant signal. ### Claim 16 (depends on 1) The network node according to claim 1, wherein after receipt of the uplink communication request the network node is configured to identify the unoccupied radio network temporary identifier as occupied and include a new unoccupied radio network temporary identifier in a subsequent random access grant signal. ### Claim 17 A user node for a wireless communication system, the user node comprising: a processor configured to identify at least a radio network temporary identifier and a resource allocation from a plurality of random access grant signals received on a time-frequency resource, wherein the plurality of random access grant signals are received on a single beam; and a transceiver configured to transmit an uplink communication connection request using the resource allocation identified from the received plurality of random access grant signals. ### Claim 18 (depends on 17) The user node according to claim 17, wherein the processor is configured to: correlate the received signal with a set of predetermined codes; select a code from the set of predetermined codes that yields a largest correlation with the received signal; and use the selected code to decode the received signal and identify one or more parameters for the uplink communication connection request. ### Claim 19 (depends on 18) The user node according to claim 18, wherein the processor is configured to detect a request in the received signal for the user node to transmit an uplink beacon reference signal in addition to transmitting the uplink communication connection request. ### Claim 20 (depends on 17) The user node according to claim 17, wherein the processor is configured to detect a request in the received signal for the user node to transmit an uplink beacon reference signal in addition to transmitting the uplink communication connection request.