5G Logical Channel Resource Allocation for URLLC Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR technology, the existing logical channel prioritization procedure from LTE may lead to unsatisfied latency for Ultra-reliable and Low Latency Communications (URLLC) scenarios due to resource allocation based on LTE sorting criteria, where remaining resources are scheduled for Enhanced Mobile Broad Band (eMBB) after URLLC data is scheduled, causing latency issues for URLLC channels.
Innovation Solution
A method for allocating resources to logical channels in 5G NR, where a terminal device determines a target Priority Bit Rate (PBR) based on signaling from a network device, allowing dynamic adjustment of priority and resource allocation according to different service requirements, such as configuring different PBRs for URLLC and eMBB channels, and adjusting variables like Bj to prioritize URLLC channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the LTE logical channel prioritization procedure is used as a baseline in 5G NR, then resource allocation follows the established sorting criterion, but URLLC logical channels cannot obtain sufficient resources to meet latency requirements
Solution Approach 1:
The patent implements dynamic PBR adjustment where the network device can dynamically modify the PBR parameter for logical channels based on service requirements. For URLLC scenarios, the network device sets a larger PBR value to ensure sufficient resources are allocated, transforming the static LTE prioritization mechanism into a dynamic one that adapts to different service needs.
Solution Approach 2:
The patent changes the PBR parameter value to resolve the contradiction. By setting a larger PBR for URLLC logical channels, the system ensures these channels can obtain sufficient resources to meet latency requirements while maintaining the overall resource allocation framework.
2Productivity
If remaining resources are scheduled for eMBB after URLLC data is scheduled, then resource utilization is maximized, but URLLC data latency is not satisfied
Solution Approach 1:
The patent applies preliminary action by configuring a larger PBR for URLLC logical channels in advance. This ensures that when resource allocation occurs, URLLC channels have pre-established priority and can secure sufficient resources before eMBB channels consume remaining resources, preventing latency issues while maintaining overall resource utilization.
3Device complexity
If a single PBR is configured for all logical channels, then configuration is simple, but different service requirements cannot be met
Solution Approach 1:
The patent applies local quality by configuring different PBR values for different logical channels based on their specific service requirements. URLLC logical channels receive larger PBR values while other channels use standard values, allowing the system to maintain simple overall configuration while adapting to diverse service needs through localized parameter adjustments.
Data Source
AI summary
Embodiments of the present application relate to a method for allocating a resource to a logical channel, a terminal device and a network device. The method includes: receiving a first signaling sent by network device; determining a target PBR according to the first signaling; and determining a solution for allocating a granted resource to the logical channel according to the target PBR. According to the method for allocating the resource to the logical channel, the terminal device, and the network device in the embodiments of the present application, the terminal device determines the target PBR of the logical channel according to the signaling sent by the network device, so that the terminal device may allocate the granted resource to the logical channel according to the target PBR.