# US 12,004,103 B2 · Method and apparatus for transmitting synchronized broadcast transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,103 B2 - Document ID: US12004103B2 - Status: Granted - Kind: B2 - Application number: 18/167,549 - Filed: 2023-02-10 - Published: 2023-06-15 - Granted: 2024-06-04 - Earliest claimed: 2018-04-02 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Yang Liu - Web page: https://patentgrep.com/patent/US12004103B2 ## CPC - H04W 48/12: using downlink control channel - H04W 56/001: {Synchronization between nodes} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/10: with dynamo-electric generation of carriers; with mechanical filters or demodulators - H04W 16/28: using beam steering - H04W 72/30: Resource management for broadcast services - H04L 5/0023: {Time-frequency-space} - 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 Aspects of the disclosure provide a method and apparatus for transmitting a synchronization broadcast transmission. At least one candidate transmission location corresponding to at least one synchronization signal/physical broadcast channel block (SSB) to be transmitted, is determined, where a number of the at least one candidate transmission location is greater than a number of SSBs in one time interval. Further, synchronization broadcast transmission including the at least one SSB is generated, and the generated synchronization broadcast transmission is transmitted at the at least one candidate transmission location in a beam sweeping manner. ## Claims ### Claim 1 A method for receiving a synchronization broadcast transmission, applied in an unlicensed frequency band, comprising: performing, by a user equipment (UE), a search at a plurality of candidate transmission locations to receive at least one synchronization broadcast transmission from a base station at part of the plurality of candidate transmission locations, wherein each of the at least one synchronization broadcast transmission comprises a respective one of at least one synchronization signal/physical broadcast channel block (SSB), and a number of the plurality of candidate transmission locations is greater than a pre-configured maximum number of SSBs transmittable by the base station in one time interval; and acquiring, by the UE, at least one SSB identifier of the at least one SSB from the at least one synchronization broadcast transmission, wherein the at least one SSB identifier is carried in the at least one SSB, wherein a maximum value of the at least one SSB identifier corresponds to the pre-configured maximum number of SSBs transmittable by the base station in one time interval, or the maximum value of the at least one SSB identifier corresponds to the number of the plurality of candidate transmission locations. ### Claim 2 (depends on 1) The method of claim 1, wherein the number of the plurality of candidate transmission locations is n times the pre-configured maximum number of SSBs transmittable by the base station in one time interval, where n is equal to 2, or n is a ratio of a duration of one time interval to a duration of a half frame. ### Claim 3 (depends on 1) The method of claim 1, wherein acquiring the at least one SSB identifier comprises: parsing a demodulation reference signal (DMRS) sequence of a physical broadcast channel (PBCH) in each of the at least one SSB and data bits in the PBCH according to a respective synchronization broadcast transmission of the at least one synchronization broadcast transmission; and acquiring an SSB identifier of each of the at least one SSB through both the DMRS sequence of the PBCH in the each of the at least one SSB and the data bits in the PBCH. ### Claim 4 (depends on 1) The method of claim 1, wherein one or more of the plurality of candidate transmission locations is in a candidate transmitting slot of a set of candidate transmitting slots; and wherein the set of candidate transmitting slots is {10, 20, 40, 80, 160}ms, or, the set of candidate transmitting slots is {5, 10, 20, 40, 80, 160}ms in response to the pre-configured maximum number of SSBs transmittable by the base station in one time interval being 4, or the set of candidate transmitting slots is {10, 20, 40, 80, 160}ms in response to the pre-configured maximum number of SSBs transmittable by the base station in one time interval being greater than 4. ### Claim 5 A device for receiving a synchronization broadcast transmission, comprising: a processor; and a memory configured to store instructions executable by the processor, wherein the processor is configured to: perform a search at a plurality of candidate transmission locations to receive at least one synchronization broadcast transmission from a base station at part of the plurality of candidate transmission locations, wherein each of the at least one synchronization broadcast transmission comprises a respective one of at least one synchronization signal/physical broadcast channel block (SSB), and a number of the plurality of candidate transmission locations is greater than a pre-configured maximum number of SSBs transmittable by the base station in one time interval; and acquire at least one SSB identifier of the at least one SSB from the at least one synchronization broadcast transmission, wherein the at least one SSB identifier is carried in the at least one SSB, wherein a maximum value of the at least one SSB identifier corresponds to the pre-configured maximum number of SSBs transmittable by the base station in one time interval, or the maximum value of the at least one SSB identifier corresponds to the number of the plurality of candidate transmission locations. ### Claim 6 (depends on 5) The device of claim 5, wherein the number of the plurality of candidate transmission locations is n times the pre-configured maximum number of SSBs transmittable by the base station in one time interval, where n is equal to 2, or n is a ratio of a duration of one time interval to a duration of a half frame. ### Claim 7 (depends on 5) The device of claim 5, wherein the processor is specifically configured to: parse a demodulation reference signal (DMRS) sequence of a physical broadcast channel (PBCH) in each of the at least one SSB and data bits in the PBCH according to a respective synchronization broadcast transmission of the at least one synchronization broadcast transmission; and acquire an SSB identifier of each of the at least one SSB through both the DMRS sequence of the PBCH in the each of the at least one SSB and the data bits in the PBCH. ### Claim 8 (depends on 5) The device of claim 5, wherein one or more of the plurality of candidate transmission locations is in a candidate transmitting slot of a set of candidate transmitting slots; and wherein the set of candidate transmitting slots is {10, 20, 40, 80, 160}ms, or, the set of candidate transmitting slots is {5, 10, 20, 40, 80, 160}ms in response to the pre-configured maximum number of SSBs transmittable by the base station in one time interval being 4, or the set of candidate transmitting slots is {10, 20, 40, 80, 160}ms in response to the pre-configured maximum number of SSBs transmittable by the base station in one time interval being greater than 4. ### Claim 9 A non-transitory computer-readable storage medium, in which computer instructions are stored, wherein the instructions are executed by a processor to implement following actions: performing a search at a plurality of candidate transmission locations to receive at least one synchronization broadcast transmission from a base station at part of the plurality of candidate transmission locations, wherein each of the at least one synchronization broadcast transmission comprises a respective one of at least one synchronization signal/physical broadcast channel block (SSB), and a number of the plurality of candidate transmission locations is greater than a pre-configured maximum number of SSBs transmittable by the base station in one time interval; and acquiring at least one SSB identifier of the at least one SSB from the at least one synchronization broadcast transmission, wherein the at least one SSB identifier is carried in the at least one SSB; wherein a maximum value of the at least one SSB identifier corresponds to the pre-configured maximum number of SSBs transmittable by the base station in one time interval, or the maximum value of the at least one SSB identifier corresponds to the number of the plurality of candidate transmission locations. ### Claim 10 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein the number of the plurality of candidate transmission locations is n times the pre-configured maximum number of SSBs transmittable by the base station in one time interval, where n is equal to 2, or n is a ratio of a duration of the time interval to a duration of a half frame. ### Claim 11 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein acquiring the at least one SSB identifier comprises: parsing a demodulation reference signal (DMRS) sequence of a physical broadcast channel (PBCH) in each of the at least one SSB and data bits in the PBCH according to a respective synchronization broadcast transmission of the at least one synchronization broadcast transmission; and acquiring an SSB identifier of each of the at least one SSB through both the DMRS sequence of the PBCH in the each of the at least one SSB and the data bits in the PBCH. ### Claim 12 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein one or more of the plurality of candidate transmission locations is in a candidate transmitting slot of a set of candidate transmitting slots; and wherein the set of candidate transmitting slots is {10, 20, 40, 80, 160}ms, or, the set of candidate transmitting slots is {5, 10, 20, 40, 80, 160}ms in response to the pre-configured maximum number of SSBs transmittable by the base station in one time interval being 4, or the set of candidate transmitting slots is {10, 20, 40, 80, 160}ms in response to the pre-configured maximum number of SSBs transmittable by the base station in one time interval being greater than 4.