Wireless Terminal System Information Acquisition via Dedicated Signaling
Solution Overview
Problem
In heterogeneous wireless communication networks, terminals face difficulties in acquiring system information due to interference, leading to service disruptions and increased radio resource consumption when imprudent system information is provided.
Innovation Solution
A method where a terminal transmits a system information acquisition failure report message to request compulsory system information through dedicated signaling, using a timer to ensure acquisition and performing connection recovery if necessary, thereby minimizing service disruptions and optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is transmitted through broadcast channels in heterogeneous networks, then system information can be provided to terminals, but interference occurs at coverage boundaries causing acquisition failure
Solution Approach 1:
The patent introduces dedicated signaling as an intermediary channel to transmit compulsory system information directly to the terminal, bypassing the interfering broadcast channel. The network device sends system information through dedicated RRC signaling when broadcast acquisition fails, acting as a mediator that delivers information without being affected by the interference at coverage boundaries.
Solution Approach 2:
The patent segments system information into two categories: compulsory system information (transmitted through dedicated signaling) and optional system information (transmitted through broadcast channels). This segmentation ensures that critical information is delivered reliably through the dedicated channel while non-critical information uses the broadcast channel, resolving the contradiction by protecting essential information from interference.
2Loss of time
If terminals continuously monitor for system information updates, then system information can be acquired timely, but radio resource consumption increases
Solution Approach 1:
The patent applies preliminary action by having the network device proactively send compulsory system information through dedicated signaling before the terminal needs to request it. The network predicts when the terminal may need system information and pre-transmits it, eliminating the need for continuous monitoring and reducing both time loss and energy consumption.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal reports its system information acquisition status to the network device. Based on this feedback, the network device decides whether to send system information through dedicated signaling or broadcast channels, optimizing resource usage by only transmitting when necessary and adjusting transmission methods based on terminal needs.
3Reliability
If dedicated signaling is used to transmit compulsory system information, then acquisition reliability improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by using different transmission methods for different types of system information: dedicated signaling for compulsory information requiring high reliability, and broadcast channels for optional information. This localized approach ensures high reliability where needed without applying complex dedicated signaling universally, thus managing device complexity while maintaining necessary reliability.
Data Source
AI summary
Provided is an operating method for acquiring system information which is to be performed by a terminal in a wireless communication system. The method comprises: transmitting, to a serving cell, a system information acquisition failure report message that requests the transmission of compulsory system information; operating a system based on the acquired compulsory system information upon the acquisition of the compulsory system information as a response to the system information acquisition failure report message; and performing a connection recovery upon the failure of the acquisition of the compulsory system information as a response to the system information acquisition failure report message.