# US 2019/0357209 A1 · Method for transmitting radio resource control message, central unit and distributed unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357209 A1 - Document ID: US20190357209A1 - Status: Published application - Kind: A1 - Application number: 16/476,059 - Filed: 2018-02-14 - Published: 2019-11-21 - Earliest claimed: 2017-01-06 - Assignees: China Academy of Telecommunications Technology - Applicants: China Academy of Telecommunications Technology - Inventors: Aijuan LIU; Dajun ZHANG; Fangli XU - Web page: https://patentgrep.com/patent/US20190357209A1 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 12/4633: {Interconnection of networks using encapsulation techniques, e.g. tunneling} - H04W 76/11: Allocation or use of connection identifiers - H04W 88/085: {Access point devices with remote components} - 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) ## Abstract A method for transmitting a radio resource control message, a network side central unit, and a network side distributed unit are provided. The method for transmitting a radio resource control (RRC) message includes: mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane; and sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane or a control plane. ## Claims ### Claim 1 A method for transmitting a radio resource control (RRC) message, applied to a network side central unit (CU), comprising: mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane; and sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane or a control plane. ### Claim 2 (depends on 1) The method according to claim 1, wherein the step of sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane comprises: adding the effective time and the logical channel identifier of the RRC message in a point-to-point tunneling protocol GTP-U header; and sending the GTP-U header and the data stream to the corresponding network side distributed unit (DU) through the user plane. ### Claim 3 (depends on 1) The method according to claim 1, wherein the step of sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through a control plane comprises: sending the data stream to an interface application protocol layer (AP) between the CU and the DU; assembling an interface message comprising the effective time and the logical channel identifier of the RRC message and the data stream by the interface AP; and sending the interface message to the corresponding network side distributed unit (DU) through the control plane. ### Claim 4 (depends on 3) The method according to claim 3, wherein the step of assembling an interface message comprising the effective time and the logical channel identifier of the RRC message and the data stream by the interface AP comprises: incorporating the data stream in the interface message, in the form of a container. ### Claim 5 (depends on 1) The method according to claim 1, wherein the step of mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane comprises: sending the RRC message to a corresponding packet data convergence protocol (PDCP) entity; and generating, with the PDCP entity, PDCP layer protocol data corresponding to the RRC message, wherein the data stream is formed by the PDCP layer protocol data. ### Claim 6 (depends on 1) The method according to claim 1, wherein the step of mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane comprises: sending the RRC message to a corresponding packet data convergence protocol (PDCP) entity; generating, with the PDCP entity, PDCP layer protocol data corresponding to the RRC message; sending the PDCP layer protocol data to a corresponding radio link control protocol (RLC) high layer entity; and generating, with the RLC high layer entity, RLC layer protocol data corresponding to the PDCP layer protocol data, wherein the data stream is formed by the RLC layer protocol data. ### Claim 7 A method for transmitting a radio resource control (RRC) message, applied to a network side distributed unit (DU), comprising: receiving effective time and a logical channel identifier of the RRC message and a data stream sent by a network side central unit (CU); and sending the data stream to a corresponding user equipment according to the effective time and the logical channel identifier. ### Claim 8 (depends on 7) The method according to claim 7, wherein the step of receiving effective time and a logical channel identifier of the RRC message and a data stream sent by a network side central unit (CU) comprises: receiving a point-to-point tunneling protocol GTP-U header and the data stream sent by the CU through a user plane, wherein the GTP-U header comprises the effective time and the logical channel identifier of the RRC message. ### Claim 9 (depends on 7) The method according to claim 7, wherein the step of receiving effective time and a logical channel identifier of the RRC message and a data stream sent by a network side central unit (CU) comprises: receiving an interface application protocol layer (AP) message between the CU and the DU sent by the CU through a control plane, wherein the interface AP message comprises the effective time and the logical channel identifier of the RRC message and the data stream. ### Claim 10 (depends on 7) The method according to claim 7, wherein the step of sending the data stream to a corresponding user equipment according to the effective time and the logical channel identifier comprises: sending the data stream to a corresponding entity for preset processing; and sending the processed data stream to the corresponding user equipment according to the effective time and the logical channel identifier. ### Claim 11 (depends on 10) The method according to claim 10, wherein when the data stream is formed by packet data convergence protocol (PDCP) layer protocol data, the step of sending the data stream to a corresponding entity for preset processing comprises: sending the data stream to a corresponding radio link control protocol (RLC) entity, and obtaining the processed data stream through a medium access control protocol (MAC) layer, a physical layer and radio frequency processing. ### Claim 12 (depends on 10) The method according to claim 10, wherein when the data stream is formed by radio link control protocol (RLC) layer protocol data, the step of sending the data stream to a corresponding entity for preset processing comprises: sending the data stream to a corresponding RLC low layer entity, and obtaining the processed data stream through a medium access control protocol (MAC) layer, a physical layer and radio frequency processing. ### Claim at position 13 13-24. (canceled) ### Claim 25 A network side central unit (CU), comprising a processor, a transceiver, and a memory; wherein the processor is configured to read a program in the memory to perform the following process: mapping a radio resource control (RRC) message into a data stream of a level corresponding to a user plane; sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane or a control plane; the transceiver is configured to receive and transmit data; and the memory is configured to store data used by the processor when performing operations. ### Claim 26 (depends on 7) A network side distributed unit (DU), comprising a processor, a transceiver, and a memory; wherein the processor is configured to read a program in the memory to perform the method according to claim 7; the transceiver is configured to receive and transmit data; and the memory is configured to store data used by the processor when performing operations. ### Claim 27 (depends on 25) The network side central unit (CU) according to claim 25, wherein the sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through the user plane comprises: adding the effective time and the logical channel identifier of the RRC message in a point-to-point tunneling protocol GTP-U header; and sending the GTP-U header and the data stream to the corresponding network side distributed unit (DU) through the user plane. ### Claim 28 (depends on 25) The network side central unit (CU) according to claim 25, wherein the sending effective time and a logical channel identifier of the RRC message and the data stream to a corresponding network side distributed unit (DU) through a control plane comprises: sending the data stream to an interface application protocol layer (AP) between the CU and the DU; assembling an interface message comprising the effective time and the logical channel identifier of the RRC message and the data stream by the interface AP; and sending the interface message to the corresponding network side distributed unit (DU) through the control plane. ### Claim 29 (depends on 28) The network side central unit (CU) according to claim 28, wherein the assembling an interface message comprising the effective time and the logical channel identifier of the RRC message and the data stream by the interface AP comprises: incorporating the data stream in the interface message, in the form of a container. ### Claim 30 (depends on 25) The network side central unit (CU) according to claim 25, wherein the mapping the radio resource control (RRC) message into a data stream of a level corresponding to a user plane comprises: sending the RRC message to a corresponding packet data convergence protocol (PDCP) entity, and generating, with the PDCP entity, PDCP layer protocol data corresponding to the RRC message, wherein the data stream is formed by the PDCP layer protocol data; or, sending the RRC message to a corresponding packet data convergence protocol (PDCP) entity, generating, with the PDCP entity, PDCP layer protocol data corresponding to the RRC message, sending the PDCP layer protocol data to a corresponding radio link control protocol (RLC) high layer entity, and generating, with the RLC high layer entity, RLC layer protocol data corresponding to the PDCP layer protocol data, wherein the data stream is formed by the RLC layer protocol data. ### Claim 31 (depends on 26) The network side distributed unit (DU) according to claim 26, wherein the receiving effective time and a logical channel identifier of the RRC message and a data stream sent by a network side central unit (CU) comprises: receiving a point-to-point tunneling protocol GTP-U header and the data stream sent by the CU through a user plane, wherein the GTP-U header comprises the effective time and the logical channel identifier of the RRC message; or, receiving an interface application protocol layer (AP) message between the CU and the DU sent by the CU through a control plane, wherein the interface AP message comprises the effective time and the logical channel identifier of the RRC message and the data stream; wherein the sending the data stream to a corresponding user equipment according to the effective time and the logical channel identifier comprises: sending the data stream to a corresponding entity for preset processing, and sending the processed data stream to the corresponding user equipment according to the effective time and the logical channel identifier. ### Claim 32 (depends on 31) The network side distributed unit (DU) according to claim 31, wherein when the data stream is formed by packet data convergence protocol (PDCP) layer protocol data, the sending the data stream to a corresponding entity for preset processing comprises: sending the data stream to a corresponding radio link control protocol (RLC) entity, and obtaining the processed data stream through a medium access control protocol (MAC) layer, a physical layer and radio frequency processing; wherein when the data stream is formed by radio link control protocol (RLC) layer protocol data, the sending the data stream to a corresponding entity for preset processing comprises: sending the data stream to a corresponding RLC low layer entity, and obtaining the processed data stream through a medium access control protocol (MAC) layer, a physical layer and radio frequency processing.