# US 11,115,985 B2 · PBCH transmission method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,985 B2 - Document ID: US11115985B2 - Status: Granted - Kind: B2 - Application number: 16/610,201 - Filed: 2018-05-04 - Published: 2020-06-25 - Granted: 2021-09-07 - Earliest claimed: 2017-05-04 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jianqin Liu; Chuanfeng He - Web page: https://patentgrep.com/patent/US11115985B2 ## CPC - H04L 1/1819: {with retransmission of additional or different redundancy} - H04W 72/0466: {the resource being a scrambling code} - H04B 7/06: at the transmitting station - H04B 7/26: at least one of which is mobile - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 1/0038: {Blind format detection (for detection of modulation format H04L27/0012)} - H04L 1/0052: {Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables} - H04L 1/0061: {Error detection codes} - H04L 1/1642: {Formats specially adapted for sequence numbers} - H04W 72/00: Local resource management - H04W 72/04: Wireless resource allocation - H04W 72/30: Resource management for broadcast services - H04W 92/10: between terminal device and access point, i.e. wireless air interface - H04B 7/0617: {for beam forming} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 A physical broadcast channel (PBCH) transmission method and an apparatus. The method includes scrambling PBCH based on a first scrambling code of the PBCH, where the first scrambling code is one of four scrambling codes, where a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) indicates one value of four values, and where the four scrambling codes have a one-to-one correspondence with the four values, and sending the PBCH to a terminal device. ## Claims ### Claim 1 A scrambling method, comprising: scrambling a physical broadcast channel (PBCH) according to a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01, 10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and wherein the first scrambling code corresponds to the value of the combination of the second lesat significant bit and the third least significant bit of the SFN, wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, wherein the second least significant bit is a ninth bit place in the ten bits of the SFN, and sending the PBCH to a terminal device. ### Claim 2 (depends on 1) The method according to claim 1, wherein the PBCH is sent in the radio frame with the SFN. ### Claim 3 (depends on 1) The method according to claim 1, wherein the four scrambling codes are different segments of one scrambling code sequence. ### Claim 4 (depends on 1) The method according to claim 1, wherein the four scrambling codes are four different scrambling sequences. ### Claim 5 An apparatus, comprising: one or more processors; and a non-transitory computer-readable storage medium storing a program to be executed by the one or more processors, to cause the apparatus to: scramble a physical broadcast channel (PBCH) based on a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01, 10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and wherein the first scrambling code corresponds to the value of the combination of the second least significant bit and the third least significant bit of the SFN, wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, and wherein the second least significant bit is a ninth bit place in the ten bits of the SFN; and send the PBCH to a terminal device. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein the PBCH is sent in a radio frame with the SFN. ### Claim 7 (depends on 5) The apparatus according to claim 5, wherein the four scrambling codes are different segments of one scrambling code sequence. ### Claim 8 (depends on 5) The apparatus according to claim 5, wherein the four scrambling codes are four different scrambling sequences. ### Claim 9 A non-transitory computer readable medium, comprising computer program instructions which, when executed by one or more processors of an apparatus, cause the apparatus to: scramble a physical broadcast channel (PBCH) based on a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01, 10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and wherein the first scrambling code corresponds to the value of the combination of the second least significant bit and the third least significant bit of the SFN, wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, and wherein the second least significant bit is a ninth bit place in the ten bits of the SFN; and send the PBCH to a terminal device. ### Claim 10 (depends on 9) The non-transitory computer readable medium according to claim 9, wherein the PBCH is sent in the radio frame with the SFN. ### Claim 11 (depends on 9) The non-transitory computer readable medium according to claim 9, wherein the four scrambling codes are different segments of one scrambling code sequence. ### Claim 12 (depends on 9) The non-transitory computer readable medium according to claim 9, wherein the four scrambling codes are four different scrambling sequences. ### Claim 13 A communications method, comprising: receiving a physical broadcast channel (PBCH) from a network device; decoding the PBCH according to a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01, 10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and wherein the first scrambling code corresponds to the value of the combination of the second least significant bit and the third least significant bit of the SFN, wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, and wherein the second least significant bit is a ninth bit place in the ten bits of the SFN. ### Claim 14 (depends on 13) The method according to claim 13, wherein the PBCH is received in the radio frame with the SFN. ### Claim 15 (depends on 13) The method according to claim 13, wherein the four scrambling codes are different segments of one scrambling code sequence. ### Claim 16 (depends on 13) The method according to claim 13, wherein the four scrambling codes are four different scrambling sequences. ### Claim 17 An apparatus, comprising: one or more processors; and a non-transitory computer readable memory storing a program which, when executed by the one or more processors, causes the apparatus to: receive a physical broadcast channel (PBCH) from a network device; and decode the PBCH according to a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01, 10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and wherein the first scrambling code corresponds to the value of the combination of the second least significant bit and the third least significant bit of the SFN; wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, and wherein the second least significant bit is a ninth bit place in the ten bits of the SFN. ### Claim 18 (depends on 17) The apparatus according to claim 17, wherein the PBCH is received in the radio frame with the SFN. ### Claim 19 (depends on 17) The apparatus according to claim 17, wherein the four scrambling codes are different segments of one scrambling code sequence. ### Claim 20 (depends on 17) The apparatus according to claim 17, wherein the four scrambling codes are four different scrambling sequences. ### Claim 21 A non-transitory computer readable medium, comprising computer program instructions which when executed by one or more processors cause an apparatus to: receive a physical broadcast channel (PBCH) from a network device; and decode the PBCH according to a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01,10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and the first scrambling code corresponds to the value of the combination of the second least significant bit and the third least significant bit of the SFN, wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, and wherein the second least significant bit is a ninth bit place in the ten bits of the SFN. ### Claim 22 (depends on 21) The non-transitory computer readable medium according to claim 21, wherein the PBCH is received in the radio frame with the SFN. ### Claim 23 (depends on 21) The non-transitory computer readable medium according to claim 21, wherein the four scrambling codes are different segments of one scrambling code sequence. ### Claim 24 (depends on 21) The non-transitory computer readable medium according to claim 21, wherein the four scrambling codes are four different scrambling sequences. ### Claim 25 A communication system, comprising: a network device; and a terminal device; wherein the network device is configured to scramble a physical broadcast channel (PBCH) according to a first scrambling code of the PBCH, wherein the first scrambling code is one of four scrambling codes, wherein a value of a combination of a second least significant bit and a third least significant bit of a system frame number (SFN) of a radio frame of the PBCH is one value of four values, the four values comprising 00, 01, 10 and 11, wherein the four scrambling codes have a one-to-one correspondence with the four values, and wherein the first scrambling code corresponds to the value of the combination of the second least significant bit and the third least significant bit of the SFN, wherein the SFN comprises ten bits, wherein the third least significant bit is in an eighth bit place in the ten bits of the SFN, and wherein the second least significant bit is a ninth bit place in the ten bits of the SFN; wherein the network device is further configured to send the PBCH to the terminal device; and wherein the terminal device is configured to receive the PBCH and to decode the PBCH according to the first scrambling code of the PBCH.