# US 12,004,242 B2 · System information indication method and apparatus and communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,242 B2 - Document ID: US12004242B2 - Status: Granted - Kind: B2 - Application number: 17/986,387 - Filed: 2022-11-14 - Published: 2023-03-16 - Granted: 2024-06-04 - Earliest claimed: 2017-03-24 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Yulong Shi; Meiyi Jia; Hua Zhou - Web page: https://patentgrep.com/patent/US12004242B2 ## CPC - H04W 4/02: Services making use of location information - H04W 76/11: Allocation or use of connection identifiers - H04L 1/1614: {using bitmaps} - H04W 4/021: Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences - H04W 4/20: Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 48/12: using downlink control channel - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 80/08: Upper layer protocols {(network arrangements or communication protocols for networked applications H04L67/00)} - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - Y02D 30/70: in wireless communication networks - 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) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A system information indication method and apparatus and a communication system. In the embodiments of this disclosure, by indicating a correspondence between an area related ID or a system information related index and system information, and/or notifying information on a change of the area related ID or system information related index, a case may be avoided where a UE needs still to obtain system information from a network side when system information of a current cell is stored, thereby efficiently lowering power consumption of the UE in acquiring the system information. ## Claims ### Claim 1 A user equipment (UE) comprising: a memory configured to store a system information block(s); a receiver configured to receive information on an area related identity (ID) corresponding to a system information block(s) mapping information field (SIB-Mappinginfo field), the area related ID corresponding to a number of a system information block(s); and processor circuitry configured to: control to check whether the stored system information block(s) is valid according to the information, and configure the SIB-Mappinginfo field for the are related identity (ID) in a message broadcast by a network side, wherein a bit included in the SIB-Mappinginfo field corresponds to a system information block, and the bit indicates that the system information block is associated with the area related ID. ### Claim 2 (depends on 1) The UE according to claim 1, wherein the processor circuitry is further configured to: use the stored system information block(s) when the stored system information block(s) is valid, and acquire a new system information block(s) to which the area related ID corresponds when the stored system information block(s) is invalid. ### Claim 3 (depends on 1) The user equipment (UE) according to claim 1, further comprising: a transmitter configured to transmit, to a network device, a system information request message corresponding to the area related ID. ### Claim 4 (depends on 3) The user equipment (UE) according to claim 3, further comprising: the receiver configured to receive, from the network device, a new system information block(s) that is transmitted by the network device according to system information request message. ### Claim 5 (depends on 1) The UE according to claim 1, wherein the area related ID corresponds to the number of a system information block(s) in all system information block(s). ### Claim 6 A network device, comprising: a memory; processor circuitry coupled to the memory and is configured to: transmit information on an area related identity (ID) corresponding to a system information block(s) mapping information field (SIB-Mappinginfo field), the area related ID corresponding to a number of a system information block(s), cause a user equipment (UE) to check whether a system information block(s) to which the UE is stored is valid according to the information by transmitting the information, and configure the SIF-Mappinginfo field for the area related identity (ID) in a broadcast message, wherein a bit included in the SIB-Mappinginfo field corresponds to a system information block, and the bit indicates that the system information block is associated with the area related ID. ### Claim 7 (depends on 6) The network device according to claim 6, further comprising: a receiver configured to receive a system information request message transmitted by the UE, the system information request message corresponding to the area related ID. ### Claim 8 (depends on 7) The network device according to claim 7, wherein the processor circuitry is further configured to transmit, to the UE, a new system information block(s) device according to the system information request message. ### Claim 9 A wireless communication system comprising: a network device configured to: transmit information on an area related identity (ID) corresponding to a system information block(s) mapping information field (SIB-Mappinginfo field), the area related ID corresponding to a number of a system information block(s), and configured the SIB-Mappinginfo field for the area related identity (ID) in a broadcast message, wherein a bit included in the SIB-Mappinginfo field corresponds to a system information block, and the bit indicates that the system information block is associated with the area related ID; and a receiver configured to: receive the information from the network device, and control to check whether the stored system information block(s) is valid according to the information.