MTC Channel Access Profile for Signaling Overhead Reduction
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Solution Overview
Problem
In wireless communication networks, especially in LTE systems, machine-type communication devices experience high signaling and protocol overhead due to the need for frequent RRC Connection Establishment procedures, even for transmitting small amounts of data, as they often switch between RRC_CONNECTED and RRC_IDLE states, leading to inefficient resource utilization.
Innovation Solution
Implementing a machine type communication channel access profile that stores and synchronizes user equipment contexts, including serving-cell information, to enable faster and more efficient reconnection by pre-allocating channels and reducing the need for full RRC connection setups, thus minimizing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If user equipment switches between RRC_CONNECTED and RRC_IDLE states for machine-type communication, then energy consumption is reduced during idle periods, but signaling overhead and protocol complexity increase due to frequent RRC Connection Establishment procedures
Solution Approach 1:
The patent applies preliminary action by maintaining user equipment contexts and serving-cell information in the network before the device needs to reconnect. When an MTC device transitions from idle to connected state, the network already has pre-stored context information, eliminating the need for full RRC connection establishment procedures. This allows the device to quickly resume communication without generating excessive signaling overhead, while still benefiting from idle state energy savings.
2Reliability
If full RRC Connection Establishment procedure is performed for each access attempt, then connection reliability is ensured, but transmission time and productivity are reduced for small data packets
Solution Approach 1:
The patent extracts and separates the essential connection establishment elements from the full RRC connection procedure. By maintaining and reusing pre-stored user equipment contexts and serving-cell information, the system extracts only the critical authentication and context restoration steps, omitting redundant setup procedures. This extraction approach maintains connection reliability while significantly improving transmission efficiency for small data packets in machine-type communication scenarios.
3Quantity of substance
If user equipment context is released from the last serving eNodeB during idle state, then network resources are optimized, but reconnection complexity increases for stationary devices
Solution Approach 1:
The patent applies local quality by differentiating the treatment of user equipment contexts based on device type and mobility characteristics. For stationary MTC devices, the network maintains local copies of user equipment contexts and serving-cell information at the eNodeB level, while for mobile devices, contexts are released as usual. This localized approach optimizes network resources for mobile users while providing enhanced reconnection capabilities for stationary machine-type communication devices without increasing overall system complexity.
Data Source
AI summary
Apparatus and method for communication are provided. The method includes storing a machine type communication channel access profile of user equipment configured to utilize machine type communication with a network when the equipment has not an active connection with the network. The access profile is based on active UE contexts including serving-cell contexts of the device on the last access occasion. The access profile is synchronized between the user equipment and the network.