RRC Connection Request Message Integration for 5G Core Network Identification
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Solution Overview
Problem
In 5G communication systems, existing methods fail to efficiently integrate RRC connection request messages, leading to increased radio resource usage and ambiguity in determining the intended core network for UE connections, especially in coexistence with 4G core networks.
Innovation Solution
A method is proposed where RRC connection request messages are integrated into a single message with indicators (LCID) to distinguish purposes and core network types, allowing base stations to recognize the intended core network without increasing message capacity, using logical channel identities (LCIDs) to indicate the purpose and type of core network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple RRC connection request messages are integrated into a single message, then radio resource usage is reduced, but the base station cannot distinguish the purpose and intended core network without increasing message capacity
Solution Approach 1:
The patent segments the information by introducing a new field structure within the integrated RRC connection request message. This field contains both a message type indicator and a core network type indicator, allowing the base station to distinguish between different purposes (initial connection, reestablishment, resumption) and different core network types (4G-EPC, 5G-core) without requiring separate messages or increasing overall message capacity.
Solution Approach 2:
The patent creates a universal integrated message structure that serves multiple functions simultaneously. The single RRC connection request message can indicate different message types (initial, reestablishment, resumption) and different core network types (4G-EPC, 5G-core) through its fields, making it a multi-functional message that replaces multiple separate messages while maintaining full information capability.
2Loss of information
If separate messages are used for different RRC connection purposes, then message distinction is clear, but radio resource usage increases
Solution Approach 1:
The patent merges multiple separate RRC connection request messages (initial connection request, reestablishment request, resumption request) into a single integrated message structure. The message includes fields that clearly indicate the purpose through a message type indicator and the intended core network through a core network type indicator, achieving both message consolidation and clear distinction.
3Measurement precision
If the message capacity is increased to include core network type information, then the base station can determine the intended core network, but the efficiency of radio resource usage decreases
Solution Approach 1:
The patent applies partial action by introducing only the necessary fields (message type indicator and core network type indicator) within the existing message structure rather than expanding the overall message capacity. This allows the base station to accurately identify the core network type (4G-EPC or 5G-core) and message purpose while maintaining efficient radio resource usage through compact field representation.
Data Source
AI summary
Disclosed are a method for requesting an RRC connection and an apparatus supporting same. The method comprises the steps of: generating a message for an RRC connection request; generating a header including an indicator indicating a use relating to the RRC connection request of the generated message, and generating a medium access control protocol data unit (MAC PDU) including the generated message; and transmitting the generated MCA PDU to a base station.