Uplink Status Reporting for Low Latency in 5G Systems
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Solution Overview
Problem
There is a need for a method and device to efficiently report uplink status and determine resource priorities in next-generation mobile communication systems to reduce latency, which has not been adequately addressed in conventional art.
Innovation Solution
The method involves classifying logical channels into groups for buffer status report (BSR) messages, prioritizing BSR messages over data, and using truncated BSRs when resources are insufficient, along with configuring logical channel and configured grant priorities to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional uplink status reporting methods are used, then device complexity is reduced, but latency increases
Solution Approach 1:
The patent segments the uplink status reporting mechanism by introducing separate BSR triggers and reporting procedures for configured grants. This segmentation allows the system to specifically optimize latency-critical reporting paths without complicating the entire uplink reporting framework, thereby reducing latency while controlling overall device complexity.
Solution Approach 2:
The patent implements preliminary action by pre-configuring grant resources and BSR trigger conditions before data transmission is needed. This advance configuration enables the UE to immediately report buffer status when triggers occur without waiting for scheduling decisions, significantly reducing reporting latency while maintaining manageable complexity through pre-established rules.
2Measurement precision
If detailed buffer status reports are transmitted, then resource allocation accuracy is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies local quality by making the BSR reporting detail adaptive rather than uniformly detailed. The UE reports comprehensive buffer status information only when specifically triggered and needed, while using more concise reporting otherwise. This localized application of detailed reporting maintains accuracy where required while improving overall resource utilization efficiency.
Solution Approach 2:
The patent changes the parameter of BSR reporting granularity dynamically based on trigger conditions and network configuration. By adjusting the level of detail in buffer status reports according to specific conditions (such as configured grant indications or scheduling needs), the system achieves accurate resource allocation when necessary while maintaining high resource utilization efficiency through reduced reporting overhead in other scenarios.
3Quantity of substance
If multiple uplink resources are allocated, then data transmission capacity is improved, but resource collision probability increases
Solution Approach 1:
The patent introduces dynamics into resource allocation by enabling flexible prioritization of conflicting uplink resources based on real-time conditions. When resource collisions occur, the system dynamically determines which resource to use based on factors such as BSR trigger types, configured grant priorities, and current buffer status, allowing multiple resources to be allocated while maintaining reliability through adaptive conflict resolution.
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 1e
AI summary
The disclosure relates to a communication method and a system therefor, wherein the method converges IoT technology and a 5G communication system for supporting a high data transmission rate beyond that of a 4G system. The disclosure may be applied to intelligent services (e.g. a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, and security and safety-related service) on the basis of 5G communication technology and loT-related technology. The disclosure relates to a method performed by a terminal (1a-10, 2d-10) in a wireless communication system, the method comprising: receiving, from a base station (1a-20, 2d-20) through a radio resource control, RRC, signaling, information for configuring a first configured grant, CG, and a second CG, information on an allowed CG for at least one logical channel, and information on a priority for the at least one logical channel; identifying that the first CG is allowed for at least one first logical channel and the second CG is allowed for at least one second logical channel, based on the information on the allowed CG for the at least one logical channel; determining a priority of the first CG based on a highest priority among at least one priority of the at least one first logical channel, and a priority of the second CG based on a highest priority among at least one priority of the at least one second logical channel; identifying that resources of the first CG and the second CG are overlapped; and transmitting, to the base station, data based on the first CG, in case that the determined priority of the first CG is higher than the determined priority of the second CG.