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BR-112020020233-B1 - METHOD AND APPARATUS FOR TRANSMITTING SYNCHRONIZATION BROADCASTS

BR112020020233B1BR 112020020233 B1BR112020020233 B1BR 112020020233B1BR-112020020233-B1

Abstract

METHOD AND APPARATUS FOR TRANSMITTING SYNCHRONIZATION BROADCAST TRANSMISSION. A method and apparatus for transmitting synchronized broadcast transmission are disclosed in this application. The method comprises: determining alternative transmission positions corresponding to the synchronized broadcast blocks to be transmitted, the number of alternative transmission positions being greater than the number of synchronized broadcast blocks within a period; generating synchronized broadcast information containing the synchronized broadcast blocks; and transmitting the synchronization broadcast transmission generated at the alternative transmission positions in a beam-scanning manner.

Inventors

  • Yang Liu

Assignees

  • BEIJING XIAOMI MOBILE SOFTWARE CO., LTD

Dates

Publication Date
20260317
Application Date
20180402

Claims (11)

  1. 1. Method for sending a synchronization broadcast transmission, characterized in that it comprises: determining (101) a plurality of candidate transmission sites corresponding to at least one SSB physical broadcast channel/synchronization signal to be transmitted, wherein a plural number of candidate transmission sites is greater than a number of SSBs in a time interval; and wherein the number of SSBs in a time interval is a maximum number of transmissible SSBs in a time interval; generating (102) a synchronization broadcast transmission comprising at least one SSB; and sending (103) the generated synchronization broadcast transmission in part of the plurality of candidate transmission sites in a beam-scanning manner; wherein the synchronization broadcast transmission further comprises at least one SSB identifier of the at least one SSB; the at least one SSB identifier is carried in the at least one SSB; The maximum value of at least one SSB identifier corresponds to the number of SSBs in the time interval, or the maximum value of at least one SSB identifier corresponds to the plurality number of candidate transmission sites.
  2. 2. Method, according to claim 1, characterized in that at least one candidate transmission site number is n times the number of SSBs in the time interval, where n equals 2, or n is a ratio of a time interval duration to a half-frame duration.
  3. 3. Method, according to claim 1, characterized in that at least one SSB identifier is transmitted through a DMRS demodulation reference signal sequence in a physical PBCH broadcast channel in the SSB and data bits in the PBCH.
  4. 4. Method, according to claim 1, characterized in that the transmission of the synchronization broadcast generated at least at the candidate transmission site in beam scan mode comprises: sending the synchronization broadcast generated at least at the candidate transmission site in a selected candidate transmission slot in beam scan mode, a candidate set of the candidate transmission slot being {10, 20, 40, 80, 160} ms, or, the candidate set of the candidate transmission slot being {5, 10, 20, 40, 80, 160} ms in response to the number of SSBs in a time interval being 4, or the candidate set of the candidate transmission slot being {10, 20, 40, 80, 160} ms in response to the number of SSBs in a time interval being greater than 4.
  5. 5. A method according to claim 1, characterized in that at least one SSB to be transmitted comprises at least two SSBs to be transmitted belonging to a group, and the at least two SSBs to be transmitted comprise a first SSB to be transmitted at a first candidate transmission site from a plurality of candidate transmission sites; and wherein the method further comprises: detecting whether the first candidate transmission site is idle or not, in response to the fact that the first candidate transmission site is not idle, determining all SSBs in the group, and foregoing sending the generated synchronization broadcast transmission to all SSBs in the group in the form of beam scanning.
  6. 6. Method for receiving a synchronization broadcast transmission, characterized in that it comprises: performing, by a user equipment, UE, a search in a plurality of candidate broadcast locations to receive at least one synchronization broadcast transmission from a base station in part of the plurality of candidate broadcast locations, wherein each of the at least one synchronization broadcast transmission comprises a respective block of at least one synchronization signal/physical broadcast channel, SSB, and the number of the plurality of candidate broadcast locations is greater than a pre-configured maximum number of SSBs transmissible by the base station in a time interval; to acquire, by a UE, at least one SSB identifier from at least one SSB of at least one synchronization transmission, wherein the at least one SSB identifier is carried in at least one SSB, wherein a maximum value of the at least one SSB identifier corresponds to the maximum pre-configured number of SSBs transmissible by the base station in a time interval, or the maximum value of the at least one SSB identifier corresponds to the number of candidate transmission plurality locations.
  7. 7. The method of claim 6, wherein the plurality number of candidate transmission sites is n times the maximum pre-configured number of SSBs transmissible by the base station in a time interval, where n equals 2, or n is a ratio between the duration of a time interval and the duration of half a frame.
  8. 8. Method, according to claim 6, characterized in that it acquires at least one SSB identifier comprising: analyzing a DMRS demodulation reference signal sequence of a physical broadcast channel, PBCH, in each of the at least one SSB and data bits in the PBCH according to the 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 the DMRS sequence of the PBCH in each of the at least one SSB and the data bits in the PBCH.
  9. 9. Method according to claim 6, characterized in that one or more of the plurality of candidate transmission locations are in a candidate transmission slot of a set of candidate transmission slots; and wherein the set of candidate transmission slots is {10, 20, 40, 80, 160} ms, or the set of candidate transmission slots is {5, 10, 20, 40, 80, 160} ms in response to the maximum pre-configured number of SSBs transmissible by the base station in a time interval being 4, or the set of candidate transmission slots is {10, 20, 40, 80, 160} ms in response to the maximum pre-configured number of SSBs transmissible by the base station in a time interval being greater than 4.
  10. 10. Device for sending a synchronization broadcast transmission, characterized in that it comprises: a processor; and a memory configured to store instructions executable by the processor, wherein the processor is configured to implement the method of claims 1-5.
  11. 11. Device for receiving a synchronization broadcast transmission, characterized in that it comprises: a processor; and a memory configured to store instructions executable by the processor, wherein the processor is configured to implement the method of claims 6-9.

Description

TECHNICAL FIELD [0001] The present invention relates to the technical field of communication and, in particular, to a method and device for sending synchronized broadcast transmission. STATE OF THE ART [0002] In the related technique, an industry project was recently established for research into unlicensed 5G spectrum, and a solution supporting the independent network of unlicensed 5G cells was proposed. For the independent network design of unlicensed 5G spectrum, the first step is to consider the design of synchronization signal blocks (SS)/blocks (SSBs) of physical transmission channels (PBCH). However, an effective solution does not yet exist in the industry at this time. SUMMARY OF THE INVENTION [0003] The embodiments of the present invention provide a method and device for sending synchronization broadcast transmission. The technical solutions are implemented as follows. [0004] According to a first aspect of the embodiments of the present invention, a method is provided for sending synchronization broadcast transmission, which may include: [0005] determine a candidate transmission site corresponding to a physical broadcast channel synchronization/block signal (SSB) to be transmitted, wherein the number of candidate transmission sites is greater than the number of SSBs in a given time interval; [0006] generate synchronization broadcast transmission comprising SSB; and [0007] send the synchronization broadcast transmission generated at the candidate transmission site in a beam scanning manner. [0008] The technical solution provided in embodiments of the present invention may have the following beneficial effects. In embodiments, the number of candidate transmission sites is greater than the number of SSBs in a given time interval. A system prepares more candidate transmission sites, and if a channel is busy at a given transmission time for a particular candidate transmission site, there are more other candidate transmission sites for selection, so that the probability of a base station sending the synchronization broadcast transmission is improved, and convenience is brought to the timely synchronization processing of the User Equipment (UE). [0009] In one embodiment, the number of candidate transmission sites can be n times the number of SSBs in a time interval, n equals 2 or n is a ratio of a time interval duration to a half-frame duration. [0010] The technical solution provided in the embodiment of the present invention may have the following beneficial effects. In the embodiment, the number of candidate transmission sites is at least twice the number of SSBs in a time interval, so that relatively more candidate transmission sites are provided, the probability that the base station will transmit the synchronization broadcast transmissions is improved, and convenience is brought to the time synchronization processing of the UE. [0011] In one embodiment, the synchronization broadcast transmission may further comprise an SSB identifier of the SSB; the SSB identifier is carried in the SSB; and [0012] a maximum value of the SSB identifier can correspond to the number of SSBs in a time interval, [0013] or, the maximum value of the SSB identifier corresponds to the number of candidate transmission sites. [0014] The technical solution provided in the embodiment of the present invention can have the following beneficial effects. In the embodiment, several numbering methods for the SSB identifier are provided and can be flexibly adopted, and convenience is brought to the UE recognition and synchronization processing. [0015] In one embodiment, the SSB identifier can be transmitted via a demodulation reference signal sequence (DMRS) from a PBCH in the SSB and data bits in the PBCH. [0016] The technical solution provided in the embodiment of the present invention may have the following beneficial effect. In the embodiment, an implementation solution is provided for a transmission location of the SSB identifier. [0017] In one embodiment, the transmission operation of the synchronization broadcast generated at the candidate transmission site in the form of beam scanning may include: [0018] send the synchronization broadcast transmission generated at the candidate transmission site in a selected candidate transmission slot in the form of a beam scan, [0019] a candidate of the transmission slot candidate being {10, 20, 40, 80, 160} ms, or, [0020] the candidate of the transmission slot being {5, 10, 20, 40, 80, 160} ms in response to the number of SSBs in a time interval being 4, or the candidate of the transmission slot being {10, 20, 40, 80, 160} ms in response to the number of SSBs in a time interval being greater than 4. [0021] The technical solution provided in the embodiment of the present invention may have the following beneficial effects. In the embodiment, relatively more candidate transmission locations are provided, so that the candidate transmission slots are changed accordingly. In the embodiment, an im