MTC Device Data Transmission via Uplink NAS Override
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Solution Overview
Problem
Machine Type Communication (MTC) devices face challenges in transmitting important or small data due to network congestion, as conventional congestion control methods do not consider the unique features of MTC devices, leading to delays and inefficient use of network resources.
Innovation Solution
Implementing a method where MTC devices receive a mobility management (MM) back-off timer from the network, allowing them to transmit data through an uplink Non-Access Stratum (NAS) message even if the timer has not expired, and optionally overriding or stopping the timer to prioritize data transmission, especially for monitoring data, responses to network triggers, SMS, and location services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MTC devices wait for MM back-off timer to expire before transmitting data, then network congestion is controlled, but data transmission is delayed
Solution Approach 1:
The patent makes the back-off timer mechanism dynamic by allowing MTC devices to adaptively override or stop the timer based on data priority. High-priority data (monitoring data, location services, SMS) can trigger immediate transmission by overriding the timer, while low-priority data continues to respect the timer. This dynamic adjustment resolves the contradiction between maintaining congestion control reliability and reducing transmission delays.
Solution Approach 2:
The patent changes the operational parameter of the back-off timer from a fixed constraint to a flexible parameter that can be modified based on data characteristics. By introducing priority-based parameter changes, the system allows the timer to be stopped or overridden for high-priority MTC data while maintaining it for other traffic, thus balancing congestion control with timely data delivery.
2Speed
If MTC devices transmit data immediately without waiting for back-off timer, then data transmission speed is improved, but network congestion worsens
Solution Approach 1:
The patent applies local quality by differentiating treatment based on data type and priority. Instead of uniformly applying the back-off timer to all MTC data, the system applies selective override permissions to specific high-priority data categories (monitoring data, location services, SMS). This localized approach allows fast transmission where needed while maintaining congestion control for other traffic.
Solution Approach 2:
The patent implements partial action by allowing only certain high-priority MTC data to override the back-off timer, rather than allowing all data to transmit immediately. This selective partial override achieves faster transmission for critical data without causing excessive congestion from unrestricted immediate transmission of all data types.
3Device complexity
If conventional congestion control methods are applied to MTC devices, then network resource allocation is simplified, but MTC device features are not considered leading to inefficient resource usage
Solution Approach 1:
The patent segments the congestion control mechanism by introducing priority-based categories for different MTC data types. Instead of a single uniform control mechanism, the system divides data into priority levels (high-priority data that can override the timer versus other data that must wait). This segmentation enables more efficient resource utilization by considering MTC device features while maintaining manageable complexity through structured classification.
Data Source
AI summary
The present specification provides a method for transmitting data of a machine type communication (MTC) device. The method for transmitting data of an MTC device comprises the steps of: receiving a mobility management (MM) latency timer from a mobility management entity within a network; operating the MM latency timer; determining whether data to be transmitted is generated before the expiration of the MM latency timer; and transmitting the data to be transmitted through an uplink NAS message even though the MM latency timer has not expired when the data to be transmitted is generated.