Local Service Access Retry Using Valid-Time Back-Off Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Terminals rejected from accessing a local service due to network congestion or authorization issues are unable to initiate NAS signaling requests within a long back-off timer period, leading to communication performance degradation.
Innovation Solution
Implementing a first back-off timer based on the valid time of the network providing the local service, allowing terminals to perform non-public network selection or re-attempt signaling requests after the timer expires, thereby optimizing access to local services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a long back-off timer is assigned to terminals after NAS signaling rejection, then network signaling load is reduced, but terminal access reliability within the service valid time window deteriorates
Solution Approach 1:
The patent applies dynamics by making the back-off timer value adjustable rather than fixed. The network can dynamically set different back-off timer values in rejection messages based on current network conditions and service validity periods. This allows the system to adapt between reducing signaling load (longer timers) and maintaining access reliability (shorter timers) depending on the situation.
Solution Approach 2:
The patent changes the parameter of back-off timer duration from a static value to a configurable parameter. By modifying the timer value parameter in rejection messages, the network can optimize the balance between signaling load reduction and access reliability. The timer value can be adjusted according to service validity time and network congestion levels.
2Stability of the object's composition
If terminals are prevented from sending NAS signaling requests during back-off timer operation, then network congestion is reduced, but terminal communication performance deteriorates
Solution Approach 1:
The system dynamically adjusts the back-off timer duration to balance congestion control and communication performance. When network congestion is severe, longer timers are applied to stabilize network load. When service validity time is limited or network conditions improve, shorter timers are used to maintain terminal productivity and access success rates.
Solution Approach 2:
The back-off mechanism creates periodic retry behavior where terminals wait for the timer duration before attempting reconnection. This periodic action prevents continuous signaling storms during congestion while ensuring terminals can re-attempt access within the service valid time window, maintaining overall system productivity.
Data Source
AI summary
A communication method for a local service includes: sending, by a terminal, a first message, he first message being used to request a local service; receiving, by the terminal, a rejection message, the rejection message being used to indicate that a request for the local service is rejected; and performing, by the terminal, non-public network selection, or starting, by the terminal, a first back-off timer, where the terminal does not send the first message during operation of the first back-off timer, and a value of the first back-off timer is determined based on a valid time of a network that provides the local service.