Radio Resource Priority Determination Using HARQ Buffer State
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Solution Overview
Problem
In wireless communication systems, determining the priority value of a radio resource efficiently is challenging, especially when multiple uplink radio resources overlap, and there is a need to differentiate between available and unavailable resources.
Innovation Solution
A method and apparatus for a user equipment (UE) to obtain an uplink transmission resource, determine if a MAC PDU is stored in a HARQ buffer, and identify the priority of the uplink transmission resource based on this determination, ensuring that only available and high-priority resources are used for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink radio resources are allocated to a UE, then the data transmission capacity is improved, but it becomes difficult to determine the priority value of each radio resource
Solution Approach 1:
The patent changes the parameter used for priority determination from complex multi-factor analysis to a simple binary parameter: whether the HARQ buffer is empty or not. This parameter change simplifies the priority determination process while maintaining effective resource allocation, resolving the contradiction between improved data transmission capacity and reduced determination complexity.
Solution Approach 2:
The patent applies different priority rules to different local conditions: when the HARQ buffer is empty, the radio resource gets high priority; when the buffer is not empty, it gets low priority. This local differentiation based on buffer state allows simple yet effective priority management across multiple allocated resources.
2Measurement precision
If priority determination is based on complex criteria, then the accuracy of resource selection is improved, but the processing time and complexity increase
Solution Approach 1:
The system performs preliminary action by pre-establishing the priority rule based on HARQ buffer state before actual resource allocation decisions are needed. This allows the UE to quickly determine priority without complex real-time analysis, reducing processing time while maintaining accurate resource selection through the predetermined buffer-state-based criteria.
3Productivity
If all allocated radio resources are used for transmission, then the resource utilization is improved, but unavailable resources may be wasted
Solution Approach 1:
The patent uses feedback from the HARQ buffer state to dynamically adjust which radio resources are activated for transmission. By monitoring whether the buffer is empty or not, the system provides feedback that determines resource availability, ensuring that only resources with actual data to transmit are utilized. This prevents wasting resources on unavailable transmissions while maintaining high overall resource utilization.
Data Source
AI summary
The present disclosure relates to a communication technique for merging an IoT technology with a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technologies and IoT-related technologies. The present disclosure relates to a method performed by a terminal in a wireless communication system and an apparatus for performing same, the method comprising the steps of obtaining an uplink transmission resource, determining whether a medium access control (MCA) protocol data unit (PDU), which is to be transmitted as the uplink transmission resource, is stored in a hybrid automatic repeat request (HARQ) buffer, and identifying the priority of the uplink transmission resource on the basis of a result of the determination.