# US 11,910,446 B2 · Access node, a method for an access node, a wireless terminal and a method for a wireless terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,446 B2 - Document ID: US11910446B2 - Status: Granted - Kind: B2 - Application number: 17/580,167 - Filed: 2022-01-20 - Published: 2022-05-12 - Granted: 2024-02-20 - Earliest claimed: 2016-07-28 - Assignees: Daingean Technologies Ltd. - Applicants: Daingean Technologies Ltd. - Inventors: Atsushi Ishii - Web page: https://patentgrep.com/patent/US11910446B2 ## CPC - H04W 48/14: using user query {or user detection} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 48/10: using broadcasted information - H04W 48/12: using downlink control channel - H04W 48/16: Discovering, processing access restriction or access information - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 88/02: Terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and apparatus is provided to use a value tag in conjunction with transmission and/or processing of system information in a wireless communication network, specifically in conjunction with second type system information or non-essential type system information. An access node may initiate broadcasting second type system information when the second type information content is updated, in order to avoid multiple on-demand delivery requests from wireless terminals. The access node may compress second type system information to be delivered by broadcast. ## Claims ### Claim 1 An apparatus for a radio access network, the apparatus comprising: a memory storing instructions; and at least one processor configured to execute the instructions to cause the apparatus to: generate a first system information block (SIB), the first SIB comprising information essential for access to the radio access network and additional information, the additional information comprising an indication about whether a second SIB is to be transmitted by broadcasting or on-demand, the second SIB comprising non-essential information; set the information indicating that the second SIB is to be transmitted by broadcasting or on-demand when transmission of the second SIB is changed; transmit the first SIB; and transmit a message to user equipment for triggering reception of the first SIB. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to execute the instructions to cause the apparatus to: transmit a changed second SIB by broadcasting; wherein the first SIB further comprises a value corresponding to the changed second SIB. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the value corresponding to the changed second SIB is used to determine whether the second SIB is changed. ### Claim 4 (depends on 2) The apparatus of claim 2, wherein: the value corresponding to the changed second SIB is a first value corresponding to the second SIB; and the first value corresponding to the second SIB is compared with a second value corresponding to the second SIB stored in the user equipment to determine whether the second SIB is changed. ### Claim 5 A method for a radio access network, the method comprising: generating a first system information block (SIB), the first SIB comprising information essential for access to the radio access network and additional information, the additional information comprising an indication about whether a second SIB is to be transmitted by broadcasting or on-demand, the second SIB comprising non-essential information; setting the information indicating that the second SIB is to be transmitted by broadcasting or on-demand when transmission of the second SIB is changed; transmitting the first SIB; and transmitting a message to user equipment for triggering reception of the first SIB. ### Claim 6 (depends on 5) The method of claim 5, further comprising: transmitting a changed second SIB by broadcasting; wherein the first SIB further comprises a value corresponding to the changed second SIB. ### Claim 7 (depends on 6) The method of claim 6, wherein the value corresponding to the changed second SIB is used to determine whether the second SIB is changed. ### Claim 8 (depends on 6) The method of claim 6, wherein: the value corresponding to the changed second SIB is a first value corresponding to the second SIB; and the first value corresponding to the second SIB is compared with a second value corresponding to the second SIB stored in the user equipment to determine whether the second SIB is changed. ### Claim 9 A user equipment for accessing a radio access network, the user equipment comprising: a memory storing instructions; and at least one processor configured to execute the instructions to cause the user equipment to: receive a message, the message triggering reception of a first system information block (SIB); receive the first SIB, the first SIB comprising information essential for access to the radio access network and additional information, the additional information comprising an indication about whether a second SIB is to be transmitted by broadcasting or on-demand, the second SIB comprising non-essential information; determine, based on the first SIB, whether transmission of a second SIB is changed; and receive a changed second SIB in response to a determination that the second SIB is changed. ### Claim 10 (depends on 9) The user equipment of claim 9, wherein the at least one processor is configured to execute the instructions to cause the user equipment to receive the changed second SIB based on the additional information about whether the second SIB is to be transmitted by broadcasting. ### Claim 11 (depends on 9) The user equipment of claim 9, wherein: the additional information indicates that the second SIB is to be transmitted by broadcasting; and the at least one processor is configured to execute the instructions to cause the user equipment to receive the changed second SIB from a broadcast channel. ### Claim 12 (depends on 9) The user equipment of claim 9, wherein: the first SIB further comprises a first value corresponding to the changed second SIB; the memory further stores a second value corresponding to the second SIB; and the at least one processor is configured to execute the instructions to cause the user equipment to determine, based on the first SIB, whether the second SIB is changed based on the first value and the second value. ### Claim 13 (depends on 12) The user equipment of claim 12, wherein the at least one processor is configured to execute the instructions to cause the user equipment to determine that the second SIB is changed when the first value is different from the second value. ### Claim 14 (depends on 9) The user equipment of claim 9, wherein the at least one processor is further configured to execute the instructions to cause the user equipment to: access the radio access network based on the first SIB. ### Claim 15 A method for accessing a radio access network, the method comprising: receiving a message, the message triggering reception of a first system information block (SIB); receiving the first SIB, the first SIB comprising information essential for access to the radio access network and additional information, wherein the additional information comprises an indication about whether a second SIB is to be transmitted by broadcasting on-demand; determining, based on the first SIB, whether transmission of a second SIB is changed; and receiving a changed second SIB in response to a determination that the second SIB is changed. ### Claim 16 (depends on 15) The method of claim 15, wherein receiving the changed second SIB comprises: receiving the changed second SIB based on the additional information about whether the second SIB is to be transmitted by broadcasting. ### Claim 17 (depends on 15) The method of claim 15, wherein: the additional information indicates that the second SIB is to be transmitted by broadcasting; and receiving the changed second SIB comprises: receiving the changed second SIB from a broadcast channel. ### Claim 18 (depends on 15) The method of claim 15, wherein: the first SIB further comprises a first value corresponding to the changed second SIB; and the method further comprises: determining whether the second SIB is changed based on the first value and a second value corresponding to the second SIB. ### Claim 19 (depends on 18) The method of claim 18, wherein determining whether the second SIB is changed based on the first value and the second value corresponding to the second SIB comprises: determining that the second SIB is changed when the first value is different from the second value. ### Claim 20 (depends on 15) The method of claim 15, further comprising: accessing the radio access network based on the first SIB.