Semi-persistence Scheduling Control for PDCCH Resource Optimization
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Solution Overview
Problem
In wireless communication systems, the use of dynamic scheduling leads to resource wastage and increased system overhead, especially when combined with VoIP services and other dynamic services, resulting in reduced savings of PDCCH resources and increased system complexity.
Innovation Solution
A semi-persistence scheduling control method that dynamically allocates resources based on statistical information from historical periods, switching between semi-persistence and dynamic scheduling by activating or deactivating semi-persistence scheduling states when certain threshold values are exceeded, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic scheduling is used for all services including VoIP, then system adaptability to various service types is improved, but system overhead increases and PDCCH resources are wasted
Solution Approach 1:
The patent implements dynamic switching between semi-persistence scheduling and dynamic scheduling based on service type and traffic conditions. The system dynamically adjusts the scheduling mode: using semi-persistence scheduling for VoIP services to save PDCCH resources, and switching to dynamic scheduling when other services are detected, thereby optimizing resource usage while maintaining system adaptability
Solution Approach 2:
The patent changes the scheduling parameter (scheduling mode) based on service characteristics. By detecting whether the service is VoIP or other services, the system changes the scheduling parameter from dynamic scheduling to semi-persistence scheduling, thereby reducing PDCCH overhead for suitable services while maintaining flexibility for others
2Loss of energy
If semi-persistence scheduling is activated for VoIP services, then PDCCH resource savings are improved, but system complexity increases when multiple service types are present
Solution Approach 1:
The patent employs feedback mechanisms where the system continuously monitors service types and traffic conditions. Based on this feedback, the system determines whether to activate or deactivate semi-persistence scheduling. This feedback-driven approach allows the system to automatically adapt to changing conditions, reducing manual configuration complexity while optimizing PDCCH resource usage
Solution Approach 2:
The system performs self-service by automatically detecting service types and selecting appropriate scheduling modes without requiring manual intervention. The eNodeB autonomously determines when to apply semi-persistence scheduling based on detected VoIP traffic, thereby simplifying operation while achieving resource savings
3Productivity
If semi-persistence scheduling is used when dynamic service data volume is high, then scheduling efficiency is improved, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of scheduling mode based on real-time traffic conditions. When dynamic service data volume exceeds a threshold, the system switches from semi-persistence scheduling to dynamic scheduling, thereby maintaining resource allocation flexibility. This dynamic switching ensures that scheduling efficiency is optimized for VoIP while flexibility is preserved for dynamic services
Data Source
Figure 1~2
AI summary
Provided are a semi-persistence scheduling control method and device, comprising acquiring dynamic service statistical information, generated and accumulated because of dynamic scheduling, about a dynamic service within a history time period; judging whether the dynamic service statistical information exceeds a set threshold value, and if so, not using semi-persistence scheduling to allocate a resource within a current time period, or otherwise using semi-persistence scheduling to allocate a resource within the current time period. By means of the above-mentioned technical solution, the present invention solves the problem of too much system overhead caused by resource waste due to the use of dynamic scheduling all the time in a communications system. Controlling whether a semi-persistence scheduling state is in effect according to feature information about a service during an execution process within a history time period improves the flexibility of use of semi-persistence scheduling, reduces the system complexity, and meanwhile ensures the service quality of a voice service and the flexibility of determining a suitable scene for an SPS.