Radio Link Flow Control Using Relay Buffer Thresholds
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Solution Overview
Problem
Wireless communication systems face congestion issues in relay nodes due to increased hop counts in multi-hop relaying, leading to performance degradation and network load increases, particularly in high-frequency radio communications.
Innovation Solution
Implementing a method for relay nodes to transmit congestion indications based on buffer thresholds, using medium access control (MAC) units or adaptation layers, to manage data transmission rates and resource allocation in end-to-end and hop-by-hop flow control techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay nodes are deployed to extend coverage in multi-hop relaying, then coverage area is improved, but network congestion increases
Solution Approach 1:
The patent segments the network into multiple hops with relay nodes, where each node independently manages its buffer and transmits congestion indications. This segmentation allows distributed flow control, preventing end-to-end congestion while maintaining extended coverage through the relay infrastructure.
2Quantity of substance
If buffer size increases to handle more data, then data transmission capacity is improved, but congestion indication delay increases
Solution Approach 1:
The patent implements feedback mechanisms where relay nodes continuously monitor buffer occupancy and transmit congestion indications to upstream nodes when thresholds are exceeded. This real-time feedback enables dynamic flow control, allowing larger buffers to be utilized effectively while maintaining timely congestion response through threshold-based triggering.
3Stability of the object's composition
If flow control is implemented to reduce congestion, then network stability is improved, but data transmission rate decreases
Solution Approach 1:
The patent applies partial flow control by implementing congestion indication only when buffer occupancy exceeds specific thresholds, rather than continuously regulating all traffic. This partial action maintains network stability during congestion while allowing unrestricted data transmission rates during normal operating conditions, thus preserving productivity.
Data Source
AI summary
The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes: receiving, at a communication device, a configuration message including a threshold to configure the communication device; and transmitting, from the communication device, a congestion indication if an occupied buffer size of the communication device is equal to or greater than the threshold.