Wireless Terminal Back-Off Timer Control for Priority-Based Congestion
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Solution Overview
Problem
Current wireless communication systems lack a clear method for configuring multiple priorities for terminals and processing packet data network connections during network congestion or overload, leading to ambiguity and inaccurate service provision, especially in Machine-Type Communication (MTC) environments where multiple priorities are involved.
Innovation Solution
A method for controlling packet data network connections and back-off timers in terminals with multiple priorities, allowing for dynamic priority configuration and management of back-off timers based on network state, policy, and subscriber data, enabling efficient handling of network congestion and ensuring accurate service provision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple priorities are configured for terminals, then service differentiation and network resource allocation are improved, but operation ambiguity and processing uncertainty increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting priority levels and back-off timer values based on network conditions and terminal types. Different priority parameters (high, medium, low) are assigned to different terminals or services, allowing the system to adapt resource allocation while maintaining clear operational rules for each priority level.
Solution Approach 2:
The patent implements dynamics by making priority configurations and back-off timer settings adjustable rather than fixed. The network can dynamically change priority levels and timer values based on current network load, terminal capabilities, and service requirements, enabling flexible resource management while preserving operational clarity through defined adjustment procedures.
2Productivity
If back-off timer is used for congestion control, then network load distribution is improved, but service delay increases
Solution Approach 1:
The patent applies local quality by implementing different back-off timer values and priority levels for different terminals or service types. Instead of a uniform back-off mechanism, high-priority terminals receive shorter timers or exemptions, while low-priority terminals receive longer timers, allowing the system to distribute load effectively while minimizing delay for critical services.
Solution Approach 2:
The patent segments the back-off timer mechanism into multiple priority-based tiers. By dividing terminals into different priority groups (high, medium, low), each with customized back-off parameters, the system can control congestion at different levels simultaneously, improving overall load distribution while reducing time loss for high-priority traffic.
3Device complexity
If single priority configuration is used, then system complexity is reduced, but service accuracy and precision decrease
Solution Approach 1:
The patent uses parameter changes to transition from a single priority parameter to multiple priority parameters (high, medium, low) with associated back-off timer values. This multi-parameter approach increases service accuracy by allowing fine-grained differentiation while managing complexity through standardized parameter sets and clear assignment rules.
Data Source
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AI summary
A wireless communication system is disclosed. More particularly, a control method and device based on multiple priorities in a wireless communication system is disclosed. The method for controlling a back-off timer in a terminal configured with multiple non-access stratum, NAS, signaling priorities, comprises checking if a back-off timer runs due to a rejection of a first request message having a first NAS signaling priority level; and transmitting a second request message without a NAS signaling priority level to a network, when the back-off timer runs due to the rejection, wherein the transmission of the second request message is performed without stopping the back-off timer.