M2M Terminal Context Management in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face inefficiencies in M2M communication due to high power consumption and signaling overhead, particularly when M2M UE switches between active and idle modes, leading to suboptimal battery life and network performance.
Innovation Solution
An operation method for M2M UE that involves checking for additional data transmission, requesting context information maintenance from the base station, and switching to an idle mode with a context keeping timer, allowing for efficient power management and reduced signaling overhead by maintaining context information for a prescribed time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If M2M UE frequently switches between active and idle modes to save power, then power consumption is reduced, but communication efficiency and response time deteriorate
Solution Approach 1:
The base station performs preliminary actions by proactively releasing M2M UE from active mode and transitioning them to idle mode before data transmissions are complete. The network side initiates the mode transition by sending RRC connection release messages, allowing the UE to enter idle mode earlier than traditional approaches where the UE would remain active until all data operations finished. This preliminary transition reduces power consumption while the network maintains the ability to quickly resume communication when needed.
2Duration of action of moving object
If M2M UE switches to idle mode to reduce power consumption, then battery life is extended, but signaling overhead increases due to context information management
Solution Approach 1:
The patent extracts and separates the context information maintenance function from the UE device, placing it entirely on the network side (base station). When M2M UE transitions to idle mode, the network retains and manages the UE's context information including security parameters, bearer configurations, and identification data. This extraction eliminates the need for frequent context update signaling between UE and network, as the network independently maintains the context without requiring UE participation, thereby reducing signaling overhead while extending battery life.
3Productivity
If M2M UE maintains context information in active mode to reduce signaling overhead, then communication efficiency improves, but power consumption increases
Solution Approach 1:
The base station acts as an intermediary that maintains context information for M2M UE in idle mode, eliminating the need for UE to maintain context in active mode. The network side stores and manages UE context parameters including security information, bearer configurations, and identification data. When the UE needs to resume communication, the base station retrieves the stored context and facilitates quick reconnection without requiring the UE to have maintained active context, thus reducing UE power consumption while preserving communication efficiency through the network's context management capability.
Data Source
AI summary
Disclosed is an operating method of an M2M terminal which operates in idle mode by confirming that there is no additional data transmission, transmitting to a base station a message for requesting to maintain context information during a predetermined time period which a timer indicates, even when changing to the idle mode, and receiving from the base station a message instructing to enter the idle mode.