5G System Information Handover With Dedicated SIB Requests
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing system information, particularly in the context of 5G networks, where UEs may not have valid versions of required system information blocks (SIBs), leading to inefficiencies in handover procedures.
Innovation Solution
A method and system are introduced for a terminal and target SpCell to handle SIB requests through a dedicated SIB request message after a random access procedure, ensuring that terminals can acquire the necessary SIBs even when they do not have valid versions, by performing a reconfiguration with sync for a target special cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a terminal performs handover to a target cell without having a valid version of required SIBs, then handover speed is improved, but system information reliability deteriorates because the terminal cannot operate properly without valid SIBs
Solution Approach 1:
The terminal checks for valid SIB versions before handover completion and requests missing SIBs in advance using dedicated signaling during the handover procedure. This preliminary verification and request mechanism ensures that required system information is obtained before the terminal needs to operate in the target cell, resolving the contradiction between fast handover and information reliability.
Solution Approach 2:
The terminal provides feedback to the network about its SIB version status after receiving SIB1 in the target cell. The network receives this feedback and responds by providing the requested SIBs through dedicated signaling. This feedback loop ensures that the terminal obtains valid system information while maintaining efficient handover procedures.
2Loss of information
If the terminal requests all required SIBs after handover using dedicated signaling, then system information completeness is improved, but signaling overhead increases
Solution Approach 1:
The terminal selectively requests only the specific SIBs that are missing or invalid, rather than requesting all SIBs. The network provides only the requested SIBs through dedicated signaling. This targeted approach ensures complete system information while minimizing signaling overhead by transmitting only the necessary data.
3Device complexity
If the terminal waits for broadcast SIBs after handover, then signaling overhead is reduced, but handover completion time increases
Solution Approach 1:
The terminal performs preliminary checks for valid SIB versions immediately after receiving SIB1 in the target cell, before proceeding with normal operation. If SIBs are missing or invalid, the terminal requests them through dedicated signaling rather than waiting for broadcast. This preliminary action ensures faster handover completion by avoiding delays from waiting for periodic broadcasts.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IOT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides method and apparatus for managing system information in a wireless communication system.