C-RNTI Release Timer for Wireless Connection Reconfiguration
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Solution Overview
Problem
Current methods for configuring connections between terminals and base stations in wireless communication systems, such as those using LTE-A, are complex and inefficient, particularly in dual connectivity scenarios with non-ideal backhaul, leading to increased signaling overhead and reduced throughput.
Innovation Solution
The method involves reusing existing cell-radio network temporary identifiers (C-RNTI) and timing advances (TA) by implementing a C-RNTI release timer, allowing for rapid reconfiguration of connections using these identifiers and determining their validity based on terminal movement, thereby simplifying the connection procedure and allocating uplink resources efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal transitions to idle mode and then needs to re-establish connection, then the connection can be reconfigured, but the conventional random access procedure increases signaling overhead and delays data transmission
Solution Approach 1:
The base station pre-configures the terminal with a C-RNTI release timer before the terminal transitions to idle mode. This timer is set to expire at a specific release time, allowing the terminal to quickly re-use the C-RNTI for uplink data transmission without undergoing the complete random access procedure, thus reducing connection reconfiguration time and enabling faster data transmission.
Solution Approach 2:
The invention allows the terminal to skip the conventional random access procedure (including preamble transmission and RACH handling) by directly using the pre-configured C-RNTI for uplink data transmission within the valid period of the C-RNTI release timer. This skipping mechanism significantly reduces signaling overhead and accelerates the data transmission process.
2Loss of information
If the terminal reuses C-RNTI after idle mode transition, then signaling overhead is reduced, but the C-RNTI must be managed with release timers to avoid conflicts
Solution Approach 1:
The base station performs preliminary configuration of the C-RNTI release timer before the terminal enters idle mode. This advance configuration establishes a clear validity period for the C-RNTI, enabling the terminal to determine whether it can re-use the C-RNTI simply by checking the current time against the release time, thus reducing signaling overhead while maintaining manageable complexity through time-based validation.
3Measurement precision
If the terminal verifies TA validity based on movement distance, then uplink transmission accuracy is improved, but additional calculations and verifications increase processing overhead
Solution Approach 1:
The invention changes the verification parameter from absolute timing advance values to relative movement distance. The terminal calculates its movement distance based on speed and time, then compares this distance with the TA change distance threshold. This parameter transformation simplifies the verification process by using easily obtainable motion parameters (speed and time) rather than complex signal processing, thus improving TA accuracy while minimizing additional processing energy.
Data Source
AI summary
Provided are a method for a connection configuration of a base station including: operating a C-RNTI release timer for release of a C-RNTI which is used in a connection mode before an idle mode after a terminal is transited to the idle mode; and configuring a connection with the terminal by using the C-RNTI before the C-RNTI release timer is expired, a method for connection configuration of a terminal including: receiving information on a release time of a C-RNTI which is used in a connection mode before an idle mode from a base station after being transited to the idle mode; and configuring a connection with the base station by using the existing C-RNTI when a transmission request of uplink data occurs for the release time, and the terminal.