Dynamic Time-Frequency Resource Allocation for Low Latency Services
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Solution Overview
Problem
Current resource multiplexing methods for short and 1 ms TTIs in 5G wireless communication systems either waste frequency domain resources or result in increased latency for URLLC services, as they fail to optimally allocate resources based on dynamic service requirements.
Innovation Solution
A resource indication method where a base station sends time-frequency resource indication information to terminals, allowing them to use non-overlapping time-frequency resources for data transmission, thereby improving resource utilization and ensuring timely processing of short-latency services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency division multiplexing is used to multiplex short TTI and 1 ms TTI, then resource allocation can be performed, but frequency domain resources are wasted when allocated resources exceed actual URLLC service requirements
Solution Approach 1:
The patent implements dynamic resource allocation by allowing flexible adjustment of frequency domain resources for short TTI based on actual URLLC service requirements. The base station can dynamically allocate or release frequency resources in response to changing service demands, transforming the static resource allocation into a dynamic system that adapts to real-time needs, thereby eliminating resource waste while maintaining allocation capability.
Solution Approach 2:
The patent changes the allocation parameters of frequency domain resources by adjusting the quantity and distribution of frequency resources allocated to short TTI based on actual service requirements. By modifying these parameters dynamically rather than using fixed allocation, the system optimizes resource utilization and prevents waste while maintaining the ability to allocate resources when needed.
2Loss of energy
If frequency domain resources are limited for short TTI transmission, then resource waste is reduced, but transmission latency of URLLC service increases when transmission cannot be completed within allocated short TTIs
Solution Approach 1:
The patent implements dynamic resource adjustment mechanisms that can increase frequency domain resources for short TTI when URLLC service transmission latency begins to increase. The system monitors transmission status and dynamically allocates additional frequency resources to accelerate transmission, transforming a static resource limit into a dynamic parameter that responds to latency concerns, thereby preventing excessive latency while maintaining resource efficiency.
Solution Approach 2:
The patent introduces feedback mechanisms where the base station monitors the transmission status of URLLC services and adjusts frequency domain resource allocation for short TTI based on this feedback. When transmission latency increases or service completion is delayed, the feedback triggers additional resource allocation, creating a closed-loop control system that balances resource efficiency with latency requirements.
3Productivity
If dynamic FDM allocation is used to adjust frequency resources based on URLLC service needs, then resource utilization improves, but resource waste or latency increase still occurs due to allocation granularity limitations
Solution Approach 1:
The patent segments frequency domain resources into smaller, more granular units that can be allocated in finer increments. This segmentation allows the base station to allocate exactly the amount of frequency resources needed for URLLC services without allocating excess resources that cannot be utilized, thereby eliminating residual resource waste while maintaining high resource utilization through precise allocation.
Solution Approach 2:
The patent applies different allocation strategies to different frequency domain segments based on local service requirements. Rather than uniformly allocating resources across the entire frequency band, the system identifies specific frequency segments where URLLC services need resources and allocates precisely to those segments, optimizing local resource utilization and preventing waste in segments where services are not active.
Data Source
AI summary
The application relates to allocating transmission resources in communication networks that provide low latency services. A terminal receives, from a base station time-frequency resource division information, which indicates a division of a time-frequency resource that is allowed to be used by another service. The division of the time-frequency resource includes one or more resource units in time domain and one or more resource units in frequency domain. The terminal further receives from the base station time-frequency resource indication information, which indicates that, in the time-frequency resource that is allowed to be used by the other service, at least one time domain resource unit and at least one frequency domain resource unit are occupied by the other service. The terminal communicates with the base station using the time-frequency resource except the at least one time-domain resource unit and at least one frequency-domain resource unit that are occupied by the other service.