Survival Time Timer Control for Reliable RAN Packet Delivery
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Solution Overview
Problem
Existing wireless communication technologies face challenges in managing network resource allocation efficiently to meet high-speed, low-latency, and ultra-reliable communication requirements, particularly in supporting complex user equipment with increasing data volumes and varying service quality needs.
Innovation Solution
Implementing a survival time timer and Access Network Packet Delay Budget (AN PDB) timer to manage packet delay budgets, with feedback mechanisms to determine successful packet transmission and trigger survival time measurements, and utilizing service-related parameters like survival time, periodicity, and feedback mechanisms to optimize communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional packet delay management is used, then network resource allocation is simplified, but communication reliability and latency requirements cannot be met
Solution Approach 1:
The patent segments the packet delay management into two distinct timers: AN PDB timer for access network packet delay budget management and survival time timer for communication reliability monitoring. This segmentation allows independent optimization of each function, meeting strict latency and reliability requirements without overwhelming complexity in a single monolithic system.
Solution Approach 2:
The AN PDB timer is started based on packet arrival time before transmission occurs, establishing a predetermined delay budget. This preliminary timing action enables the system to proactively manage packet delays and trigger appropriate actions (retransmission, duplication, or service termination) before communication failures occur, improving reliability without reactive complexity.
2Reliability
If survival time timer is continuously monitored, then packet delivery reliability is improved, but processing overhead and complexity increase
Solution Approach 1:
The survival time timer is dynamically started or restarted only when AN PDB timer expires or when packets are not successfully transmitted, rather than running continuously. This dynamic behavior reduces processing overhead and complexity by activating monitoring only when needed, while still ensuring packet delivery reliability through conditional retransmission or duplication triggers.
Solution Approach 2:
The system uses feedback mechanisms where the status of AN PDB timer expiration or packet transmission success/failure triggers the starting or restarting of survival time timer. This feedback-based control ensures reliable packet delivery monitoring while minimizing unnecessary timer operations, balancing reliability with reduced processing complexity.
3Adaptability or versatility
If multiple AN PDB timers are used in a cycle, then packet scheduling flexibility is improved, but timing synchronization complexity increases
Solution Approach 1:
Multiple AN PDB timers are used in periodic cycles for different packets or traffic flows, allowing flexible scheduling adaptability. Each timer operates independently within its cycle, and the system manages timing synchronization by restarting survival time timer based on the last AN PDB timer expiration in each cycle, reducing synchronization complexity while maintaining scheduling flexibility.
Data Source
AI summary
Service-related parameters may be communicated for a survival time measurement. Those parameters can be wirelessly communicated on the Radio Access Network (“RAN”) side. A measurement of the survival time and implementation of a survival time timer is based on those parameters and/or a timer for a packet delay budget.