# US 10,772,032 B2 · Methods, apparatuses, user equipment and base stations for sending and receiving system information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,032 B2 - Document ID: US10772032B2 - Status: Granted - Kind: B2 - Application number: 16/376,150 - Filed: 2019-04-05 - Published: 2019-08-08 - Granted: 2020-09-08 - Earliest claimed: 2016-10-10 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Xiaowei Jiang - Web page: https://patentgrep.com/patent/US10772032B2 ## CPC - H04W 48/12: using downlink control channel - H04W 48/14: using user query {or user detection} - H04W 48/10: using broadcasted information - H04W 52/0206: {in access points, e.g. base stations} - H04W 72/044: based on the type of the allocated resource - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/006: {in the downlink, i.e. towards the terminal} - 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) - 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 Methods, user equipment and base stations for sending and receiving system information (SI) are provided. The method of receiving SI includes: in response to receiving first class SI broadcasted by a base station, determining a receiving window and a preamble associated with the to-be-requested SI, wherein the to-be-requested SI belongs to second class SI; in response to arrival of the receiving window associated with the to-be-requested SI, sending the preamble in an uplink subframe configured for sending the preamble; and receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI, wherein the to-be-requested SI is sent by the base station according to the receiving window. ## Claims ### Claim 1 A method of receiving system information (SI), comprising: in response to receiving first class SI broadcasted by a base station, determining a receiving window and a preamble associated with to-be-requested SI, wherein the to-be-requested SI belongs to second class SI; in response to arrival of the receiving window associated with the to-be-requested SI, sending the preamble in an uplink subframe configured for sending the preamble; and receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI, wherein the to-be-requested SI is sent by the base station according to the receiving window. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the receiving window associated with the to-be-requested SI comprises: obtaining a scheduling list of the second class SI according to the first class SI, wherein the scheduling list is configured to record a receiving window length and a scheduling periodicity of the second class SI; and determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list. ### Claim 3 (depends on 2) The method of claim 2, wherein determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list comprises: obtaining a starting frame of the receiving window associated with the to-be-requested SI according to an appearance order of the to-be-requested SI in the scheduling list, the scheduling periodicity of the to-be-requested SI, and the receiving window length associated with each of the second class SI; obtaining a starting subframe of the receiving window associated with the to-be-requested SI according to the appearance order of the to-be-requested SI in the scheduling list and the receiving window length associated with each of the second class SI; and determining consecutive M subframes from the starting subframe as the receiving window associated with the to-be-requested SI, wherein M refers to a length of the receiving window associated with the to-be-requested SI. ### Claim 4 (depends on 1) The method of claim 1, further comprising: obtaining a time-frequency resource configured for sending the preamble according to the first class SI; determining a first uplink subframe configured for sending the preamble according to the time-frequency resource; and performing an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe. ### Claim 5 (depends on 1) The method of claim 1, further comprising: determining a first uplink subframe configured for sending the preamble according to a system preset Lime-frequency resource; and performing an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe. ### Claim 6 (depends on 1) The method of claim 1, wherein receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI comprises: determining whether the to-be-requested SI is sent on a physical downlink shared channel according to an SI scheduling instruction; and when the to-be-requested SI is sent on the physical downlink shared channel, receiving the to-be-requested SI on the physical downlink shared channel within the receiving window associated with the to-be-requested SI. ### Claim 7 (depends on 1) The method of claim 1, wherein determining the preamble associated with the to-be-requested SI comprises at least one of: determining the preamble associated with the second class SI according to the first class SI; or determining the preamble associated with the second class SI according to a system preset preamble. ### Claim 8 (depends on 1) The method of claim 1, wherein all of the second class SI associates with one preamble; or each of the second class SI associates with a different preamble. ### Claim 9 A method of sending system information (SI), comprising: sending first class SI which carries scheduling information of second class SI so that user equipment is enabled to determine a receiving window associated with target second class SI to be requested by the user equipment; in response to receiving a preamble sent by the user equipment, determining the target second class SI and a receiving window associated with the target second class SI; and after the preamble is received, sending the target second class SI within the receiving window associated with the target second class SI. ### Claim 10 (depends on 9) The method of claim 9, wherein sending the target second class SI within the receiving window associated with the target second class SI comprises: sending the target second class SI N times within the receiving window associated with the target second class SI, wherein N refers to a natural number not less than 1. ### Claim 11 (depends on 9) The method of claim 9, wherein sending the target second class SI within the receiving window associated with the target second class SI comprises: sending the target second class SI corresponding to the preamble on a physical downlink shared channel according to an SI scheduling instruction; and sending the target second class SI within the receiving window associated with the target second class SI. ### Claim 12 (depends on 9) The method of claim 9, further comprising: for each second class SI, determining scheduling information which comprises a receiving window length and a scheduling periodicity; adding the scheduling information of the second class SI to a scheduling list in an order, wherein the user equipment is caused to calculate a corresponding receiving window associated with the second class SI according to the order; and generating the first class SI according to the scheduling list. ### Claim 13 User equipment, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to: determine a receiving window and a preamble associated with to-be-requested system information (SI) in response to receiving first class SI broadcast by a base station, wherein the to-be-requested SI belongs to second class SI; send the preamble in an uplink subframe configured for sending the preamble in response to arrival of the receiving window associated with the to-be-requested SI; and receive the to-be-requested SI within the receiving window associated with the to-be-requested SI, wherein the to-be-requested SI is sent by the base station according to the receiving window. ### Claim 14 (depends on 13) The user equipment of claim 13, wherein determining the receiving window associated with the to-be-requested SI comprises: obtaining a scheduling list of the second class SI according to the first class SI, wherein the scheduling list is configured to record a receiving window length and a scheduling periodicity of the second class SI; and determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list. ### Claim 15 (depends on 14) The user equipment of claim 14, wherein determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list comprises: obtaining a starting frame of the receiving window associated with the to-be-requested SI according to an appearance order of the to-be-requested SI in the scheduling list, the scheduling periodicity of the to-be-requested SI, and the receiving window length associated with each of the second class SI; obtaining a starting subframe of the receiving window associated with the to-be-requested SI according to the appearance order of the to-be-requested SI in the scheduling list and the receiving window length associated with each of the second class SI; and determining consecutive M subframes from the starting subframe as the receiving window associated with the to-be-requested SI, wherein M refers to a length of the receiving window associated with the to-be-requested SI. ### Claim 16 (depends on 13) The user equipment of claim 13, wherein the processor is further configured to: obtain a time-frequency resource configured for sending the preamble according to the first class SI; determine a first uplink subframe configured for sending the preamble according to the time-frequency resource; and perform an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe. ### Claim 17 (depends on 13) The user equipment of claim 13, wherein the processor is further configured to: determine a first uplink subframe configured for sending the preamble according to a system preset time-frequency resource; and perform an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe. ### Claim 18 (depends on 13) The user equipment of claim 13, wherein receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI comprises: determining whether the to-be-requested SI is sent on a physical downlink shared channel according to an SI scheduling instruction; and when the to-be-requested SI is sent on the physical downlink shared channel, receiving the to-be-requested SI on the physical downlink shared channel within the receiving window associated with the to-be-requested SI. ### Claim 19 (depends on 9) A base station, comprising: a processor; and a memory for storing instructions executable by the processor, wherein the processor is configured to execute the instructions to perform the method of claim 9. ### Claim 20 (depends on 19) The base station of claim 19, wherein the processor is further configured to: for each second class SI, determine scheduling information which comprises a receiving window length and a scheduling periodicity; add the scheduling information of the second class SI to a scheduling list in an order, wherein the user equipment is caused to calculate a corresponding receiving window associated with the SI according to the order; and generate the first class SI according to the scheduling list.