Base Station System Information Broadcast for Signaling Load Reduction
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Solution Overview
Problem
In 5G communication networks, the efficiency of transmitting system information is low due to terminals needing to send separate acquisition requests for each piece of Other SI, resulting in a heavy signaling load for base stations, as base stations can only broadcast Minimum SI periodically and must wait for terminal requests to transmit Other SI.
Innovation Solution
The base station broadcasts Minimum SI that includes identifiers and transmission status of Other SI, allowing terminals to determine if Other SI is being transmitted, enabling direct acquisition without additional requests and reducing redundant transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If terminals send separate acquisition requests for each piece of Other SI, then terminals can acquire required system information, but the signaling load on base stations increases
Solution Approach 1:
The patent combines multiple Other SI pieces into a single broadcast message (SystemInformationBlockType1) that contains both Minimum SI and identifiers of Other SI. This merging eliminates the need for separate acquisition requests for each Other SI piece, reducing signaling load while ensuring terminals can acquire all required system information efficiently.
Solution Approach 2:
The base station preliminarily prepares and broadcasts a comprehensive information block containing identifiers of all available Other SI pieces along with Minimum SI. This preliminary action enables terminals to determine which Other SI is being transmitted without sending requests, thereby reducing signaling load while ensuring complete information acquisition.
2Reliability
If base stations broadcast Minimum SI periodically, then Minimum SI is transmitted reliably, but Other SI transmission efficiency decreases
Solution Approach 1:
The patent merges the periodic Minimum SI broadcast with Other SI availability information in a single broadcast message. This allows the base station to maintain reliable periodic Minimum SI transmission while simultaneously providing terminals with the ability to efficiently acquire Other SI without requiring separate request-response cycles for each piece.
Solution Approach 2:
The broadcast message includes identifiers of Other SI pieces, enabling terminals to self-determine which Other SI is currently being transmitted and acquire it directly without base station intervention. This self-service mechanism improves Other SI transmission efficiency while the base station continues its periodic Minimum SI broadcast for reliability.
Data Source
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Figure 5A~5B
AI summary
The present disclosure relates to a method and device for transmitting system information and belongs to the field of communications technologies. The method includes: determining identifiers of a plurality of pieces of currently supported second system information from first system information, wherein the first system information refers to the system information that is periodically broadcast by a current base station, and the plurality of pieces of second system information refers to the system information other than the system information comprised by the first system information; determining transmission status of the plurality of pieces of second system information based on the identifiers of the plurality of pieces of second system information; and broadcasting the first system information, wherein the first system information includes the identifiers and the transmission status of the plurality of pieces of second system information, and the transmission status is used for indicating whether the corresponding second system information is being transmitted. According to the method for transmitting the system information, provided by an embodiment of the present disclosure, the efficiency of transmitting the system information is improved and the signaling load of the base station is reduced.