RRC Connection Segmentation for MTC Signaling Overhead
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, MTC devices face challenges with high signaling overhead due to RRC connection establishment, which is inefficient for intermittent small data transmissions, leading to increased power consumption and reduced data transmission efficiency.
Innovation Solution
The method involves MTC user equipment transmitting an RRC Connection Request message with a specific indicator for short data transmission, receiving an RRC Connection Setup message, and then transmitting short data via a temporary RRC connection, allowing for immediate disconnection after successful transmission or reception, thereby reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MTC devices establish full RRC connection for data transmission, then reliable communication is ensured, but signaling overhead and power consumption increase significantly
Solution Approach 1:
The patent segments the RRC connection establishment process into two distinct modes: full RRC connection for large data transmissions and short RRC connection for small data transmissions. By introducing a short data transmission indicator and separate handling paths, the system divides the monolithic connection establishment into appropriate granularities, allowing MTC devices to use only the necessary connection type for their specific needs, thereby reducing unnecessary signaling overhead and power consumption while maintaining reliability when needed.
2Reliability
If MTC devices establish full RRC connection for data transmission, then communication reliability is ensured, but data transmission efficiency decreases due to high signaling overhead
Solution Approach 1:
The patent segments the RRC connection establishment process into two distinct modes: full RRC connection for large data transmissions and short RRC connection for small data transmissions. By introducing a short data transmission indicator and separate handling paths, the system divides the monolithic connection establishment into appropriate granularities, allowing MTC devices to use only the necessary connection type for their specific needs, thereby reducing unnecessary signaling overhead and power consumption while maintaining reliability when needed.
3Loss of energy
If MTC devices use short data transmission mode, then signaling overhead is reduced, but connection management complexity increases
Solution Approach 1:
The patent introduces an intermediary mechanism - the short data transmission indicator - that acts as a mediator between the MTC device and the network entity. This indicator enables the device to explicitly signal its data transmission needs, allowing the network to automatically select the appropriate connection mode without requiring complex device-side decision logic. The intermediary simplifies the overall system by providing a clear signaling mechanism that triggers predetermined network responses, reducing management complexity despite the dual-mode operation.
4Productivity
If MTC devices establish RRC connection frequently for small data transmissions, then data transmission capability is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the RRC connection duration adaptive rather than fixed. The system dynamically adjusts the connection establishment process based on the data transmission requirements indicated by the MTC device. When small data transmissions are detected via the short data transmission indicator, the system dynamically terminates the RRC connection after short data handling, preventing prolonged connection states and associated power consumption while maintaining full capability when needed for larger transmissions.
Data Source
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AI summary
In the present invention, disclosed is a method for transceiving a signal with a network at a user equipment in a wireless communication system, and more particularly, to a method comprising the following steps: transmitting to the network a connection request message including an indication related to an establishment cause; receiving from the network a connection setup message as a reply to the connection request message, wherein the connection setup message includes information on a connection time related to a timer; and transmitting a connection setup completion message to the network for completion of a connection establishment; starting the timer and releasing the established connection when the timer expires.