Multiple ARQ Processes for Air-Interface Congestion Control
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Solution Overview
Problem
Existing wireless communication systems face ARQ window congestion in scenarios requiring large bandwidth and high-speed data services, affecting data transmission efficiency.
Innovation Solution
Implementing multiple ARQ processes for a single data radio bearer (DRB) to enable parallel processing, with each ARQ process maintaining independent transmission and receiving windows, timers, and sequence numbers, allowing out-of-order delivery of data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single ARQ process is used for each data radio bearer, then the system structure is simple, but the air interface becomes congested in high-bandwidth and high-speed data services
Solution Approach 1:
The patent divides the single ARQ process into multiple parallel ARQ processes (first ARQ process, second ARQ process, etc.) for each data radio bearer. Each ARQ process maintains independent transmission windows, sequence numbers, and timers, allowing simultaneous data transmission across multiple processes. This segmentation prevents air interface congestion by distributing the data flow across multiple parallel channels while maintaining manageable system complexity through structured organization of each process's parameters.
2Productivity
If multiple ARQ processes are implemented for parallel data transmission, then air interface congestion is prevented, but the system complexity increases
Solution Approach 1:
The transmission window is segmented into multiple independent windows, each associated with a specific ARQ process. Each window maintains its own sequence numbers, timers, and acknowledgment mechanisms. This segmentation enables parallel data transmission and processing while managing complexity through standardized templates for each process's parameters.
Solution Approach 2:
The patent introduces variable parameters such as the number of ARQ processes (N), window sizes (L1, L2), and sequence number ranges that can be dynamically adjusted based on traffic conditions and service requirements. This allows the system to optimize performance for different data transmission scenarios while maintaining a manageable complexity through parameterization rather than fixed complex structures.
3Adaptability or versatility
If traditional ARQ processes are used, then the implementation is simple, but out-of-order packet delivery cannot be supported
Solution Approach 1:
The patent segments the data transmission into multiple independent ARQ processes, each capable of handling packets independently. This segmentation enables out-of-order delivery because different ARQ processes can transmit packets at different rates and times without interfering with each other. The receiving end manages multiple reception windows corresponding to each ARQ process, allowing flexible reassembly of out-of-order packets while maintaining clear error-free reception through independent acknowledgment mechanisms.
Data Source
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AI summary
Methods, apparatus and systems for wirelessly transmitting a data flow based on a plurality of automatic repeat request (ARQ) processes are disclosed. In one embodiment, a method performed by a transmitter module in a wireless communication system is disclosed. The method comprises: corresponding a data flow to a list of automatic repeat request (ARQ) processes that are associated with a same logical channel; and transmitting data of the data flow based on the list of ARQ processes.