RRC Release Message Condition Handling for UE Power Reduction
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Solution Overview
Problem
In mobile communication systems, user equipment (UE) experiences high power consumption when in the RRC connected mode due to frequent monitoring of the downlink control channel for data communication, and there is a need for efficient transition to RRC idle or inactive modes to reduce power consumption.
Innovation Solution
The UE receives an RRC release message with conditions for releasing or suspending the RRC connection, allowing it to maintain the connected mode until a predetermined condition is met before transitioning to either the RRC idle or inactive mode, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment remains in RRC connected mode to perform data communication, then data communication capability is maintained, but power consumption increases due to frequent monitoring of downlink control channel
Solution Approach 1:
The patent applies dynamics by making the RRC connection state changeable based on conditions. The network can configure the UE to transition from connected mode to idle/inactive mode when specific conditions are met (e.g., data transmission completed, buffer empty, time threshold reached), allowing the system to dynamically adapt the connection state to actual communication needs rather than maintaining a fixed connected state
Solution Approach 2:
The patent changes the parameter of RRC connection state from a binary connected/idle state to a conditional state where the transition timing is determined by evaluating specific parameters (data buffer status, time thresholds, communication activity). This allows optimization of power consumption by transitioning to idle mode at the appropriate moment based on parameter evaluation
2Use of energy by moving object
If the user equipment transitions to RRC idle or inactive mode to reduce power consumption, then power consumption decreases, but data communication capability is lost until reconnection
Solution Approach 1:
The patent applies preliminary action by having the network proactively configure the UE with conditions for transitioning to idle/inactive mode before the actual transition occurs. The UE evaluates these pre-configured conditions (data completion, time thresholds) and transitions at the optimal moment, ensuring communication capability is maintained until the transition point rather than losing connectivity abruptly
3Duration of action of moving object
If the user equipment maintains RRC connected mode for extended period, then data communication can continue without interruption, but the period of maintaining connected mode increases power consumption
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously evaluate whether to transition to idle mode based on pre-configured conditions provided by the network. The UE monitors its own data buffer status, communication activity, and time thresholds, and independently decides when to transition modes without continuous network control, optimizing the balance between communication continuity and power consumption
Data Source
AI summary
A communication control method according to one embodiment is a method in a mobile communication system. The communication control method includes receiving, by a user equipment in a Radio Resource Control (RRC) connected mode, an RRC release message from a base station, the RRC release message including a condition for releasing or suspending an RRC connection, performing, by the user equipment, data communication with the base station until the condition is met even in a case of receiving the RRC release message, and transitioning the user equipment to an RRC idle mode or an RRC inactive mode when the condition is met.