5G Resource Indication for TSN Services
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Solution Overview
Problem
Current preemption indication methods in 5G networks are inefficient for deterministic TSN services with small packet sizes, leading to resource waste and interference with eMBB services, as they lack fine-grained resource granularity and are not applicable to scenarios with predictable resource usage.
Innovation Solution
A resource indication method that provides fine-grained indication of time domain and frequency domain resources for preemption transmission, allowing for the identification of available resources with subcarrier or physical resource block granularity, enabling more precise allocation and reducing redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 14 bits corresponding to 14 symbol groups are used to indicate preemption, then the indication covers the entire bandwidth, but the resource granularity is too coarse for small packet TSN services
Solution Approach 1:
The patent segments the frequency domain bandwidth into multiple subbands, each with its own preemption indication bits. Instead of using a single 14-bit indication for the entire bandwidth, the system divides the bandwidth into smaller units (subbands), allowing fine-grained indication of preemption at the subband level. This enables precise resource allocation for small packet TSN services while maintaining manageable indication structure complexity through modular design.
2Reliability
If unlicensed feedback resources are reserved for preemption indication, then URLLC services can be supported, but resource waste occurs when preemption is not needed
Solution Approach 1:
The patent implements dynamic resource allocation where feedback resources are allocated on-demand rather than being statically reserved. The system dynamically determines whether to allocate feedback resources based on actual preemption needs, allowing the network to adapt resource allocation to current service requirements. This eliminates resource waste when preemption is not needed while ensuring resources are available when URLLC services require preemption indication.
3Reliability
If eMBB resources are preempted using current preemption indication, then URLLC services are supported, but redundant transmission occurs for deterministic TSN services
Solution Approach 1:
The patent applies local quality by providing differentiated preemption indication mechanisms for different service types and resource locations. Instead of uniform preemption indication across all resources, the system applies fine-grained subband-level indication that can be selectively activated based on service requirements. This allows deterministic TSN services to receive precise resource allocation without redundant transmission, while URLLC services continue to benefit from preemption capabilities.
Data Source
AI summary
Disclosed are a resource indication method and a terminal device. The method comprises: receiving first indication information, wherein the first indication information is used for indicating the time domain resource and/or the frequency domain resource of preemption transmission, the minimum granularity of the time domain resource is a symbol, and the minimum granularity of the frequency domain resource is a subcarrier or a physical resource block; and based on the first indication information, determining the available resource of a first type of service to be transmitted, wherein the available resource of the first type of service is at least part of the time domain resources excluding the time domain resource of the preemption transmission, and/or at least part of the frequency domain resources excluding the frequency domain resource of the preemption transmission.