# US 2020/0288382 A1 · Information transmission method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288382 A1 - Document ID: US20200288382A1 - Status: Published application - Kind: A1 - Application number: 16/879,590 - Filed: 2020-05-20 - Published: 2020-09-10 - Earliest claimed: 2017-11-27 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong OPPO Mobile Telecommunications Corp., Ltd. - Inventors: Yixue Lei - Web page: https://patentgrep.com/patent/US20200288382A1 ## CPC - H04W 48/14: using user query {or user detection} - H04W 74/004: {in the uplink, i.e. towards network} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 92/12: between access points and access point controllers - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 88/08: Access point devices - H04W 88/12: Access point controller devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An information transmission method and apparatus are provided. The method includes receiving, by a distributed unit (DU), a first System Information (SI) request for target SI from a terminal and forwarding the first SI request to a centralized unit (CU). Upon reception of the first SI request, the CU transmits a first indication of whether to deliver the requested target SI to the terminal. The DU generates a first SI request response based on the first indication, and transmits the first SI request response to the terminal. ## Claims ### Claim 1 A method for information transmission, the method comprising: receiving, by a distributed unit (DU), a first System Information (SI) request for a target SI transmitted from a terminal in a first message MSG1 during a random access channel (RACH) procedure; determining, by the DU, whether to deliver the target SI to the terminal based on first configuration information, which is from a centralized unit (CU), wherein the first configuration information being arranged to determine which target SI can be delivered to the terminal; generating, by the DU, a first SI request response based on the determination; and transmitting, by the DU, the first SI request response to the terminal. ### Claim 2 (depends on 1) The method of claim 1 further comprising: forwarding, by the DU, the first SI request to a centralized unit (CU), while transmitting the first SI request response to the terminal; and upon reception of the first SI request, transmitting, by the CU, a first indication for indicating whether to deliver the requested target SI to the terminal. ### Claim 3 (depends on 1) The method of claim 1 wherein the first SI request response generated by the DU is a Media Access Control (MAC) message. ### Claim 4 (depends on 1) The method of claim 1 wherein transmitting, by the DU, the first SI request response to the terminal comprises: during an RACH procedure, transmitting, by the DU, the first SI request response to the terminal in a second message MSG2. ### Claim 5 (depends on 1) The method of claim 1 wherein the DU is a gNB-DU configured for encoding of NR-MIB messages. ### Claim 6 (depends on 5) The method of claim 5 wherein the DU is a gNB-DU further configured for encoding of RMSI messages. ### Claim 7 (depends on 1) The method of claim 1 wherein the first SI request for target SI is an on-demand SI request. ### Claim 8 (depends on 1) The method of claim 1 wherein the first SI request for target SI is a MSG1-based on-demand SI request. ### Claim 9 (depends on 8) The method of claim 8 wherein the MSG1-based on-demand SI request uses an RACH process and Dedicated Radio Resource Control (RRC) signaling-based on-demand SI request uses RRC signaling. ### Claim 10 (depends on 1) The method of claim 1 wherein the CU is a gNB-CU which is configured for encoding of other SI messages. ### Claim 11 (depends on 1) The method of claim 1 wherein the first SI request response generated by the DU is a Media Access Control (MAC) message. ### Claim 12 (depends on 1) The method of claim 1 wherein the first configuration information is synchronized from a centralized unit (CU). ### Claim 13 (depends on 1) The method of claim 1 wherein the first configuration information further arranged to determine which target SI can be delivered to the terminal. ### Claim 14 An information transmission apparatus comprising: a distributed unit (DU), configured to: receive, by the DU, a first System Information (SI) request for a target SI transmitted from a terminal in a first message MSG1 during a random access channel (RACH) procedure; determine, by the DU, whether to deliver the target SI to the terminal based on first configuration information, which is from a centralized unit (CU), wherein the first configuration information being arranged to determine which target SI can be delivered to the terminal; generate, by the DU, a first SI request response based on the determination; and transmit, by the DU, the first SI request response to the terminal. ### Claim 15 (depends on 14) The apparatus of claim 14 further comprising: a centralized unit (CU), wherein the DU is configured to forward the first SI request to the CU, while transmitting the first SI request response to the terminal, and wherein the CU is configured to, upon reception of the first SI request, transmit a first indication for indicating whether to deliver the requested target SI to the terminal. ### Claim 16 (depends on 14) The apparatus of claim 14 wherein the first SI request response generated by the DU is a Media Access Control (MAC) message. ### Claim 17 (depends on 14) The apparatus of claim 14 wherein the DU is configured to, during an RACH procedure, transmit the first SI request response to the terminal in a second message MSG2. ### Claim 18 (depends on 14) The apparatus of claim 14 wherein the DU is a gNB-DU configured for encoding of NR-MIB messages. ### Claim 19 (depends on 14) The apparatus of claim 14 wherein the DU is a gNB-DU further configured for encoding of RMSI messages. ### Claim 20 A computer-readable storage medium storing computer-executable instructions that, when executed by a computer system, configure the computer system to perform operations comprising: receiving, by a distributed unit (DU), a first System Information (SI) request for a target SI transmitted from a terminal in a first message MSG1 during a random access channel (RACH) procedure; determining, by the DU, whether to deliver the target SI to the terminal based on first configuration information, which is from a centralized unit (CU), wherein the first configuration information being arranged to determine which target SI can be delivered to the terminal; generating, by the DU, a first SI request response based on the determination; and transmitting, by the DU, the first SI request response to the terminal.