# US 12,004,094 B2 · Methods and apparatus for new radio initial synchronization and paging > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,094 B2 - Document ID: US12004094B2 - Status: Granted - Kind: B2 - Application number: 16/337,582 - Filed: 2017-09-28 - Published: 2020-01-30 - Granted: 2024-06-04 - Earliest claimed: 2016-09-28 - Assignees: InterDigital Patent Holdings, Inc. - Applicants: Interdigital Patent Holdings, Inc. - Inventors: Kyle Jung-Lin Pan; Chunxuan Ye; Robert L. Olesen; Fengjun Xi - Web page: https://patentgrep.com/patent/US12004094B2 ## CPC - H04W 56/001: {Synchronization between nodes} - H04B 7/0617: {for beam forming} - H04B 7/0623: {Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information} - H04W 16/28: using beam steering - 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: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract An apparatus and method for synchronization between a WTRU and a gNB are disclosed. The WTRU may receive a multiple beam synchronization signal from the gNB during synchronization. For each beam received by the WTRU, of the multiple beam synchronization signal, the WTRU may compare a received energy of the beam against a first threshold. A multiple beam synchronization signal may include a first and second synchronization signal (SS). If one or more beams of the multiple beam synchronization signal meets or exceeds the first threshold, the WTRU may report an indication of pre-synchronization to the gNB. This pre-synchronization may indicate to the gNB that a WTRU exists in an area of a particular beam of the WTRU. In this way, a gNB may target the WTRU using transmissions directed towards the WTRU. ## Claims ### Claim 1 A method performed by a wireless transmit/receive unit (WTRU), the method comprising: receiving, by the WTRU from a base station (BS), a plurality of synchronization signals transmitted using multiple beams of the BS; comparing a received energy of each beam received by the WTRU of the multiple beams against a first threshold to identify a subset of the multiple beams of the BS; comparing an accumulated received energy of each beam of the subset against a second threshold; determining, from the plurality of synchronization signals, control information of the BS, wherein the control information comprises timing information including an orthogonal frequency division multiplexing (OFDM) symbol index, a synchronization signal block index or beam sweep timing information; and receiving data, from the BS, on a beam of subset in accordance with the determined control information. ### Claim 2 (depends on 1) The method of claim 1, further comprising: configuring the WTRU to operate and communicate in a wireless environment in accordance with the determined control information; and transmitting a report to the BS, the report indicating that the WTRU has completed synchronization to the BS. ### Claim 3 (depends on 2) The method of claim 2, further comprising: receiving, by the WTRU from the BS, a paging message, wherein the paging message is transmitted on beams which are a subset of the multiple beams of the BS. ### Claim 4 (depends on 1) The method of claim 1, wherein the plurality of synchronization signals includes a primary synchronization signal and a secondary synchronization signal. ### Claim 5 (depends on 1) The method of claim 1, further comprising: receiving, by the WTRU from the BS, a physical broadcast channel (PBCH) signal, wherein the PBCH signal is received on a subset of the multiple beams of the BS. ### Claim 6 (depends on 1) The method of claim 1, further comprising: determining a best beam of the subset. ### Claim 7 (depends on 6) The method of claim 6, further comprising: transmitting, to the BS, an indication of the determined best beam. ### Claim 8 (depends on 1) The method of claim 1, wherein the control information includes beam sweep timing information. ### Claim 9 (depends on 1) The method of claim 1, wherein the comparing is performed based on a signal-to-noise ratio (SNR). ### Claim 10 (depends on 1) The method of claim 1, wherein the synchronization signals include a PBCH signal. ### Claim 11 A wireless transmit/receive unit (WTRU) comprising: a receiver configured to receive, from a base station (BS), a plurality of synchronization signals transmitted using multiple beams of the BS; circuitry configured to compare a received energy of each beam received by the WTRU of the multiple beams against a first threshold to identify a subset of the multiple beams of the BS; the circuitry further configured to compare an accumulated received energy of each beam of the subset against a second threshold; the circuitry further configured to determine, from the plurality of synchronization signals, control information of the BS, wherein the control information comprises timing information including an orthogonal frequency division multiplexing (OFDM) symbol index, a synchronization signal block index or beam sweep timing information; and a receiver configured to receive data, from the BS, on a beam of the subset in accordance with the determined control information. ### Claim 12 (depends on 11) The WTRU of claim 11, wherein the circuitry is configured to determine a best beam of the subset. ### Claim 13 (depends on 12) The WTRU of claim 12, further comprising: a transmitter configured to transmit an indication of the best beam to the BS. ### Claim 14 (depends on 11) The WTRU of claim 11, wherein the control information is determined based on one or more beams of the plurality of beams subset. ### Claim 15 (depends on 11) The WTRU of claim 11, wherein the control information includes beam sweep timing information. ### Claim 16 (depends on 11) The WTRU of claim 11, wherein the comparison is performed based on a signal-to-noise ratio (SNR). ### Claim 17 (depends on 11) The WTRU of claim 11, wherein the synchronization signals include a PBCH signal.