RLC Data Block Priority Scheduling in Wireless Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In GPRS wireless telecommunications, high priority RLC data blocks experience unacceptable delays when lower priority data blocks are being transmitted, as existing systems require completing the transmission of lower priority data before initiating transmission of higher priority data, even when both share the same RLC entity and TBF.
Innovation Solution
The method involves making priority-based transmission decisions at the RLC data block level, allowing higher priority RLC data blocks to be transmitted before completing the transmission of lower priority data blocks by using separate transmission queues and prioritizing based on QoS attributes, ensuring that higher priority data is not delayed by lower priority data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If lower priority data blocks are transmitted completely before higher priority data blocks, then transmission order is maintained, but transmission delay for high priority data increases
Solution Approach 1:
The patent segments the transmission process into individual RLC data block units, allowing independent priority-based scheduling of each block rather than treating entire data flows as atomic units. This enables high priority blocks to be transmitted independently without waiting for low priority blocks to complete
Solution Approach 2:
The patent implements dynamic priority-based scheduling where the transmission queue is reorganized in real-time based on the priority of arriving RLC data blocks. The scheduling mechanism adapts to changing priority conditions, allowing high priority blocks to jump ahead of low priority blocks in the transmission sequence
2Reliability
If separate transmission queues are used for different priorities, then priority-based transmission is achieved, but system complexity increases
Solution Approach 1:
The patent implements a universal transmission queue structure that can handle multiple priorities within a single queue framework. The queue uses priority tags or indicators on each RLC data block to determine transmission order, eliminating the need for completely separate physical queues for each priority level while still achieving priority-based scheduling
Solution Approach 2:
The patent changes the scheduling parameter from simple FIFO (first-in-first-out) to priority-based scheduling by introducing priority levels as an additional parameter. Each RLC data block is associated with a priority indicator that the scheduler uses to determine transmission order, transforming the queue behavior without requiring separate queue structures
Data Source
AI summary
In one aspect, the invention provides apparatuses and methods for wirelessly transmitting application data utilizing priority information for each radio link control (RLC) data block transmitted. Advantageously, the application data with a relatively high transmission priority is not substantially delayed by the transmission of application data with substantially lower transmission priorities.