HARQ Process Resource Sharing for 5G URLLC Scheduling
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Solution Overview
Problem
The current 5G system's Ultra-Reliable Low Latency Communication (URLLC) technology faces inefficiencies due to the sharp reduction in available HARQ process resources for Grant-based processes, caused by the reservation of multiple Configured grants, which limits scheduling and system efficiency.
Innovation Solution
A method for determining HARQ process resources by configuring and sharing HARQ process parameters, allowing multiple Configured grants to correspond to the same HARQ process resource, thereby reducing resource reservation and improving system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple HARQ process resources are reserved for Configured grants, then URLLC transmission reliability is improved, but the number of available HARQ processes for Grant-based transmission is reduced
Solution Approach 1:
The patent merges the HARQ process resources for Configured grants and Grant-based transmission into a shared pool. Instead of reserving separate HARQ processes for Configured grants, the system allows both transmission types to share the same HARQ process resources dynamically, thereby improving system efficiency while maintaining URLLC reliability through appropriate resource allocation and scheduling.
Solution Approach 2:
The patent introduces dynamic HARQ process allocation where the HARQ process ID for Configured grants is determined dynamically based on current system state and available resources, rather than being statically reserved. This dynamic approach allows the system to adapt resource allocation in real-time, ensuring URLLC reliability while maximizing the utilization of HARQ processes for both Configured and Grant-based transmissions.
2Reliability
If multiple HARQ process resources are reserved for Configured grants, then transmission reliability is improved, but scheduling flexibility is reduced
Solution Approach 1:
The patent implements dynamic determination of HARQ process IDs for Configured grants based on current system conditions and available resources. This dynamic allocation mechanism provides scheduling flexibility by allowing the network to adapt resource assignment in real-time, while maintaining transmission reliability through appropriate HARQ process management and retransmission handling.
Solution Approach 2:
The patent makes HARQ process resources universal by allowing the same HARQ processes to serve both Configured grants and Grant-based transmissions. This multi-functional use of HARQ resources eliminates the need for dedicated reserved processes, thereby improving scheduling flexibility while maintaining the reliability required for URLLC through proper resource coordination and conflict resolution.
3Adaptability or versatility
If multiple HARQ process resources are reserved for Configured grants, then configured grant transmission is supported, but the number of available HARQ processes for Grant-based transmission is reduced
Solution Approach 1:
The patent merges the HARQ process pools for Configured grants and Grant-based transmission into a single shared resource pool. This consolidation eliminates the need to reserve separate HARQ processes for Configured grants, thereby increasing the quantity of available HARQ processes for Grant-based transmission while still supporting Configured grant transmissions through dynamic resource allocation from the shared pool.
Solution Approach 2:
The patent changes the parameter of HARQ process allocation from static reservation to dynamic determination. By introducing dynamic HARQ process ID assignment for Configured grants based on current system state, the system optimizes the distribution of HARQ processes between Configured and Grant-based transmissions, ensuring both transmission types are supported while maximizing the total utilization of available HARQ process resources.
Data Source
AI summary
An embodiment of the present application discloses an HARQ process determination method, a network device and a terminal. The method comprises: the terminal determines HARQ process resource parameters; the terminal determines currently transmitted HARQ process resources on the basis of the HARQ process resource parameters; wherein, the current transmission is a non-dynamic transmission.