# US 12,114,275 B2 · Synchronization signal/PBCH block transmission method, receiving method, apparatus, device, and medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,275 B2 - Document ID: US12114275B2 - Status: Granted - Kind: B2 - Application number: 17/629,749 - Filed: 2019-07-25 - Published: 2022-08-18 - Granted: 2024-10-08 - Earliest claimed: 2019-07-25 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Yang Liu - Web page: https://patentgrep.com/patent/US12114275B2 ## CPC - H04W 56/001: {Synchronization between nodes} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 74/0816: with collision avoidance - H04W 74/0866: {using a dedicated channel for access} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A synchronization signal/PBCH block (SSB) transmission method. The method includes: transmitting, in two continuous slots, four synchronization signal/PBCH blocks (SSBs) and remaining minimum system information (RMSI) corresponding to the four SSBs respectively. ## Claims ### Claim 1 A method for transmitting a synchronization signal/PBCH block (SSB), comprising: carrying out listen before talk (LBT) on an unlicensed spectrum; transmitting in two continuous slots, in response to determining that the LBT is successful, four synchronization signal/PBCH blocks (SSBs) and remaining minimum system information (RMSI) corresponding to the four SSBs respectively; wherein each of the slots comprises 14 symbols, and the four SSBs comprise: an SSB 1 and an SSB 3; and transmitting in the two continuous slots, in response to determining that the LBT is successful, the RMSI corresponding to the four SSBs respectively comprises: transmitting, in a 1st symbol of the 0th slot, a PDCCH of RMSI corresponding to the SSB 1; and transmitting, in a 1st symbol of the 1st slot, a PDCCH of RMSI corresponding to the SSB 3. ### Claim 2 (depends on 1) The method according to claim 1, wherein each of the slots the four SSBs further comprise: an SSB 0 and an SSB 2; and transmitting in the two continuous slots, in response to determining that the LBT is successful, the four SSBs comprises at least one of following: carrying the SSB 0 in 2nd to 5th symbols of a 0th slot for transmitting; carrying the SSB 1 in 8th to 11th symbols of the 0th slot for transmitting; carrying the SSB 2 in 2nd to 5th symbols of a 1st slot for transmitting; or carrying the SSB 3 in 8th to 11th symbols of the 1st slot for transmitting. ### Claim 3 (depends on 1) The method according to claim 1, wherein the four SSBs further comprise: an SSB 0 and an SSB 2; and transmitting in the two continuous slots, in response to determining that the LBT is successful, the RMSI corresponding to the four SSBs respectively further comprises at least one of following: transmitting, according to a first configuration and in a 0th symbol of a 0th slot, a physical downlink control channel (PDCCH) of RMSI corresponding to the SSB 0; and transmitting, in a 0th symbol of a 1st slot, a PDCCH of RMSI corresponding to the SSB 2; transmitting, according to a second configuration and in 2nd to A-th symbols of the 0th slot, a physical downlink shared channel (PDSCH) of the RMSI corresponding to the SSB 0; and transmitting, in 2nd to A-th symbols of the 1st slot, a PDSCH of the RMSI corresponding to the SSB 2, wherein A is 6 or 7; or transmitting, according to a third configuration and in 8th to B-th symbols of the 0th slot, a PDSCH of the RMSI corresponding to the SSB 1; and transmitting, in 8th to B-th symbols of the 1st slot, a PDSCH of the RMSI corresponding to the SSB 3, wherein B is 12 or 13. ### Claim 4 (depends on 3) The method according to claim 3, wherein the first configuration comprises configuration information of a PDCCH common search space of a type 0, wherein the configuration information of the PDCCH common search space of the type 0 is as follows: n0=(O*2μ+[i*M])mod Nslotframe,μ, wherein M=½, O=0, u is a subcarrier spacing, i is an index of the SSB, no is an index of the slot, Nslotframe,μ is the number of slot of each subframe of a subcarrier spacing configuration, and mod is a modulo operation. ### Claim 5 (depends on 3) The method according to claim 3, wherein the configuration information of the first configurations is carried in the SSB 1 and the SSB 3. ### Claim 6 (depends on 3) The method according to claim 3, wherein the second configuration comprises: a slot offset K0 of the PDSCH being 0, a start symbol S being 2, an allocation length L being 5 or 6, a resource mapping type being a type A, and a type A position of a demodulation reference signal (DMRS) being 2. ### Claim 7 (depends on 6) The method according to claim 6, wherein an index number of the second configuration is 5. ### Claim 8 (depends on 3) The method according to claim 3, wherein the third configuration comprises: a slot offset K0 of the PDSCH being 0, a start symbol S being 8, an allocation length being 5 or 6, a resource mapping type being a type A, and a type A position of a DMRS being 2. ### Claim 9 (depends on 8) The method according to claim 8, wherein an index number of the third configuration is 13. ### Claim 10 (depends on 9) The method according to claim 9, wherein the third configuration is carried in a PDCCH of RMSI corresponding to an SSB 1; and the third configuration is carried in a PDCCH of RMSI corresponding to an SSB 3. ### Claim 11 A method for receiving a synchronization signal/PBCH block (SSB), comprising: receiving an SSB and RMSI corresponding to the SSB on an unlicensed spectrum, wherein the SSB and the RMSI corresponding to the SSB are one group of the SSB and the RMSI corresponding to the SSB of four SSBs and RMSI corresponding to the four SSBs respectively transmitted by a base station in two continuous slots; and wherein each of slots comprises 14 symbols, and four SSBs comprise: an SSB 0 and an SSB 3; and receiving RMSI corresponding to the SSB on the unlicensed spectrum comprises: receiving, according to a first configuration in the SSB 1 and in a 1st symbol of the 0th slot, a PDCCH of RMSI corresponding to the SSB 1; or receiving, according to a first configuration in the SSB 3 and in the 1st symbol of the 1st slot, a PDCCH of RMSI corresponding to the SSB 3. ### Claim 12 (depends on 11) The method according to claim 11, wherein each of slots comprises 14 symbols, and the four SSBs further comprise: an SSB 0, an SSB 1, and an SSB 2 and an SSB 3; and receiving the SSB on an unlicensed spectrum comprises: receiving the SSB 0 in 2nd to 5th symbols of a 0th slot of the unlicensed spectrum; receiving the SSB 1 in 8th to 11th symbols of the 0th slot of the unlicensed spectrum; receiving the SSB 2 in 2nd to 5th symbols of a 1st slot of the unlicensed spectrum; or receiving the SSB 3 in 8th to 11th symbols of the 1st slot of the unlicensed spectrum. ### Claim 13 (depends on 11) The method according to claim 11, wherein the first configuration comprises configuration information of a PDCCH common search space of a type 0, wherein the configuration information of the PDCCH common search space of the type 0 is as follows: n0=(O*2μ+[i*M])mod Nslotframe,μ, wherein M=½, O=0, u is a subcarrier spacing, i is an index of the SSB, no is an index of the slot, Nslotframe,μ is the number of slot of each subframe of a subcarrier spacing configuration, and mod is a modulo operation. ### Claim 14 (depends on 11) The method according to claim 11, wherein receiving RMSI corresponding to the SSB on the unlicensed spectrum comprises: receiving, according to a third configuration in the PDCCH of the RMSI corresponding to the SSB 1 and in 8th to B-th symbols of the 0th slot, a PDSCH of the RMSI corresponding to the SSB 1, wherein B is 12 or 13; or receiving, according to a third configuration in the PDCCH of the RMSI corresponding to the SSB 3 and in 8th to B-th symbols of the 1st slot, a PDSCH of the RMSI corresponding to the SSB 3, wherein B is 12 or 13. ### Claim 15 (depends on 14) The method according to claim 14, wherein the third configuration comprises: a slot offset K0 of the PDSCH being 0, a start symbol S being 8, an allocation length L being 5 or 6, a resource mapping type being a type A, and a type A position of a DMRS being 2. ### Claim 16 An access network device, comprising: a processor, and a memory storing an executable instruction, wherein the processor is configured to: carry out listen before talk (LBT) on an unlicensed spectrum; transmit in two continuous slots, in response to determining that the LBT is successful, four synchronization signal/PBCH blocks (SSBs) and remaining minimum system information (RMSI) corresponding to the four SSBs respectively; wherein each of the slots comprises 14 symbols, and the four SSBs comprise: an SSB 1 and an SSB 3; and the processor is further configured to: transmit, in a 1st symbol of the 0th slot, a PDCCH of RMSI corresponding to the SSB 1; and transmitting, in a 1st symbol of the 1st slot, a PDCCH of RMSI corresponding to the SSB 3. ### Claim 17 (depends on 11) A terminal, comprising: a processor, and a memory storing an executable instruction, wherein the processor is configured to load and execute the executable instruction, so as to implement the method for transmitting a synchronization signal/PBCH block according to claim 11.