# US 12,191,892 B2 · Data compression method and apparatus, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,892 B2 - Document ID: US12191892B2 - Status: Granted - Kind: B2 - Application number: 18/018,882 - Filed: 2021-06-21 - Published: 2024-08-15 - Granted: 2025-01-07 - Earliest claimed: 2020-08-05 - Assignees: Datang Mobile Communications Equipment Co., Ltd. - Applicants: Datang Mobile Communications Equipment Co., Ltd. - Inventors: Huiying Zhang; Haiyang Quan - Web page: https://patentgrep.com/patent/US12191892B2 ## CPC - H03M 7/3088: {employing the use of a dictionary, e.g. LZ78} - H03M 7/6082: {Selection strategies} - H03M 7/6011: {Encoder aspects} - H03M 7/6052: {Synchronisation of encoder and decoder} - H04L 69/04: Protocols for data compression, e.g. ROHC - G06F 12/0875: with dedicated cache, e.g. instruction or stack - G06F 16/1744: {using compression, e.g. sparse files} - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Provided are a data compression method and apparatus, and a storage medium. The method is used for a data sending end; the data sensing end can carry services on a radio bearer, and each service corresponds to a compression buffer. The method includes determining a first compression buffer corresponding to a service to which first data block to be sent belongs, compressing the first data block using a dictionary corresponding to the first compression buffer to obtain compressed second data block, encapsulating the second data block in a set message, and adding, to the set message, a compression identifier used for indicating the first compression buffer, and sending, to a data receiving end, the set message carrying the compression identifier, present invention, data compression efficiency is improved, and efficient transmission of a data receiving end, the set message carrying the compression identifier. ## Claims ### Claim 1 A method for compressing a data block, performed by a data transmitting terminal which is configured to carry multiple services on a radio bearer, wherein each service corresponds to a compression buffer, the method comprises: determining a first compression buffer corresponding to a service to which a first data block to be transmitted belongs; compressing the first data block using a dictionary corresponding to the first compression buffer to obtain a compressed second data block; packaging the second data block into a protocol data unit (PDU) and adding a compression identifier for indicating the first compression buffer in a PDU header; and transmitting the PDU carrying the compression identifier to a data receiving terminal. ### Claim 2 (depends on 1) The method according to claim 1, wherein the PDU is a packet data convergence protocol (PDCP) PDU; the adding a compression identifier for indicating the first compression buffer in a PDU header comprises: adding the compression identifier in a PDCP header of the PDCP PDU. ### Claim 3 (depends on 2) The method according to claim 2, wherein the adding the compression identifier in a PDCP header of the PDCP PDU comprises: determining a setting field for carrying the compression identifier in the PDCP header; and adding the compression identifier in the setting field. ### Claim 4 (depends on 1) The method according to claim 1, wherein the compression identifier comprises one or more of the following items: a compression buffer identifier of the first compression buffer; a dictionary identifier corresponding to the first compression buffer; a service identifier corresponding to the first compression buffer. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: receiving a first message transmitted by a network device, wherein the first message comprises compression information configured by the network device for a service to be compressed; and establishing a compression buffer corresponding to the service to be compressed according to the compression information. ### Claim 6 (depends on 5) The method according to claim 5, wherein the compression information comprises one or more of the following items: a compression buffer identifier and/or a decompression buffer identifier; a dictionary identifier; compression buffer information and/or decompression buffer information; a service identifier. ### Claim 7 (depends on 1) The method according to claim 1, further comprising: receiving a second message transmitted by a network device, wherein the second message comprises release information configured by the network device for a service to be released; and releasing a compression buffer corresponding to the service to be released according to the release information. ### Claim 8 (depends on 7) The method according to claim 7, wherein the release information comprises one or more of the following items: a compression buffer identifier and/or a decompression buffer identifier; a dictionary identifier; or a service identifier. ### Claim 9 (depends on 1) The method according to claim 1, further comprising: updating a content of the dictionary corresponding to the first compression buffer with the first data block. ### Claim 10 A method for compressing a data block, performed by a data receiving terminal which is configured to receive multiple compressed services carried on a radio bearer, wherein each service corresponds to a decompression buffer, the method comprises: receiving a protocol data unit (PDU) carrying a compression identifier transmitted by a data transmitting terminal, wherein the compression identifier is used for indicating a first compression buffer corresponding to a service to which a received first data block belongs, and the PDU comprises a second data block, the second data block is a compressed first data block by the data transmitting terminal using a dictionary corresponding to the first compression buffer; determining a first decompression buffer corresponding to the first compression buffer according to the compression identifier; and decompressing the second data block using a dictionary corresponding to the first decompression buffer to obtain the first data block. ### Claim 11 (depends on 10) The method according to claim 10, wherein the PDU is a packet data convergence protocol (PDCP) PDU; and a PDCP header of the PDCP message comprises the compression identifier. ### Claim 12 (depends on 11) The method according to claim 11, wherein a setting field for carrying the compression identifier in the PDCP header comprises the compression identifier. ### Claim 13 (depends on 10) The method according to claim 10, wherein the compression identifier comprises one or more of the following items: a compression buffer identifier of the first compression buffer; a dictionary identifier corresponding to the first compression buffer; a service identifier corresponding to the first compression buffer. ### Claim 14 (depends on 10) The method according to claim 10, further comprising: receiving a first message transmitted by network device, wherein the first message comprises compression information configured by the network device for a service to be compressed; and establishing a decompression buffer corresponding to the service to be compressed according to the compression information. ### Claim 15 (depends on 14) The method according to claim 14, wherein the compression information comprises one or more of the following items: a compression buffer identifier and/or a decompression buffer identifier; a dictionary identifier; compression buffer information and/or decompression buffer information; a service identifier. ### Claim 16 (depends on 10) The method according to claim 10, further comprising: receiving a second message transmitted by a network device, wherein the second message comprises release information configured by the network device for a service to be released; and releasing a decompression buffer corresponding to the service to be released according to the release information. ### Claim 17 (depends on 16) The method according to claim 16, wherein the release information comprises one or more of the following items: a compression buffer identifier and/or a decompression buffer identifier; a dictionary identifier; a service identifier. ### Claim 18 (depends on 10) The method according to claim 10, further comprising: updating a content of the dictionary corresponding to the first decompression buffer with the first data block. ### Claim 19 (depends on 10) An apparatus for compressing: a data block configured to receive multiple services carried on a radio bearer, wherein each service corresponds to a compression buffer, the apparatus comprising a memory, a transceiver, and a processor, wherein the memory is used for storing computer programs, the transceiver is used for receiving and transmitting a data block under a control of the processor, and the processor is used for reading the computer programs in the memory and performing the method according to claim 10. ### Claim 20 An apparatus for compressing: a data block, configured to carry multiple services on a radio bearer, wherein each service corresponds to a compression buffer, the apparatus comprises a memory, a transceiver, and a processor, wherein the memory is used for storing computer programs, the transceiver is used for receiving and transmitting a data block under a control of the processor, and the processor is used for reading the computer programs in the memory and performing the following operations: determining a first compression buffer corresponding to a service to which a first data block to be transmitted belongs; compressing the first data block using a dictionary corresponding to the first compression buffer to obtain a compressed second data block; packaging the second data block into a protocol data unit (PDU) and adding a compression identifier for indicating the first compression buffer in a PDU header; and transmitting the PDU carrying the compression identifier to a data receiving terminal.