LTE Scheduling Request Priority Analysis for Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE wireless communication systems, the scheduler lacks precise information about the priority and amount of data in user equipment buffers, leading to suboptimal resource allocation and potential delays in delivering high-priority data, such as handover signaling messages, due to the limited granularity and frequency of buffer status reports and scheduling requests.
Innovation Solution
The method involves configuring user equipment to transmit scheduling requests only at predetermined opportunities, allowing the base station to analyze these requests and establish priority level information, which is used to allocate resources more effectively, thereby improving scheduling decisions and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If buffer status reports are transmitted frequently with high granularity, then scheduling accuracy is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent extracts only the essential scheduling information (priority level and amount indicator) from the full buffer status report, transmitting only what is necessary for scheduling decisions. This reduces signaling overhead while maintaining adequate scheduling accuracy by focusing on key parameters rather than complete buffer details.
Solution Approach 2:
Instead of transmitting complete buffer status information continuously, the patent transmits partial information (priority level and amount indicator) at selective intervals. This partial action approach reduces signaling load while providing sufficient information for effective scheduling decisions.
2Device complexity
If scheduling requests are transmitted only at predetermined opportunities, then signaling overhead is reduced, but scheduling response time increases
Solution Approach 1:
The patent prepares and transmits priority level information in advance at predetermined scheduling request opportunities, even before the actual data transmission needs are fully known. This preliminary action allows the base station to pre-configure scheduling decisions, reducing response time when actual data transmission is required.
Solution Approach 2:
The patent uses periodic predetermined opportunities for scheduling requests rather than continuous or on-demand transmissions. This periodic action provides regular updates to the base station about buffer status and priority information, maintaining adequate scheduling responsiveness while significantly reducing overall signaling overhead compared to continuous monitoring.
3Loss of information
If complete buffer status information is transmitted, then scheduling decisions are more accurate, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the most critical buffer status elements - the priority level (indicating QoS class) and an amount indicator - from the complete buffer status information. This extraction provides the base station with sufficient data for accurate scheduling decisions while minimizing the information overhead transmitted over the air interface.
Data Source
AI summary
Method and arrangement in a base station for allocating resources to a user equipment. The method and arrangement comprises analyzing a period of time comprising a subset of the predetermined scheduling request opportunities, detecting a scheduling request from the user equipment, establishing priority level information from the detected scheduling request and the subset of the predetermined scheduling request opportunities, and allocating resources to the user equipment, according to the established priority level information. In addition, a method and arrangement in a user equipment for assisting the base station in allocating resources to the user equipment are described.