Cross-Layer Traffic Control for QoS in Heterogeneous Networks
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Solution Overview
Problem
Existing TCP/UDP-based Internet services struggle to ensure quality of service (QoS) in multi-tiered heterogeneous network environments due to frequent retransmissions and network congestion, failing to recognize end-to-end QoS requirements and resulting in bandwidth waste and network performance degradation.
Innovation Solution
A cross-layer traffic control method that considers traffic QoS characteristics at the transport layer and routing path characteristics at the network layer to ensure QoS, using metadata analysis and path state information to adjust transmission parameters and reroute traffic as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TCP/UDP-based Internet services are used in multi-tiered heterogeneous networks, then best-effort transmission is performed, but frequent retransmissions occur due to radio errors and network congestion
Solution Approach 1:
The patent implements feedback mechanisms at both transport layer (TCP window adjustment based on QoS metrics) and network layer (routing path selection based on real-time network conditions). The system continuously monitors QoS parameters including packet loss, latency, and throughput, and uses this feedback to dynamically adjust transmission parameters and routing decisions, resolving the contradiction between best-effort transmission and reliable QoS delivery.
Solution Approach 2:
The patent changes key parameters including TCP window size, retransmission thresholds, and routing path selection criteria based on real-time QoS conditions. By dynamically adjusting these parameters according to network state and traffic characteristics, the system achieves both efficient transmission and reliable QoS satisfaction in multi-tiered heterogeneous networks.
2Speed
If conventional wireless TCP technology controls TCP parameters, then traffic acceleration is attempted, but network state information is difficult to reflect accurately
Solution Approach 1:
The patent adds a new dimension to network state detection by introducing QoS-aware measurement at multiple layers (transport and network layers). Instead of relying solely on traditional TCP indicators like SYN-ACK and queue drop, the system measures QoS parameters directly (packet loss rate, latency, throughput) and uses this multi-dimensional information to accurately reflect network state, enabling precise traffic control and acceleration.
3Device complexity
If hop-by-hop queue drop and SYN-ACK information are used to determine network state, then conventional TCP control is simplified, but multi-tiered heterogeneous network states cannot be reflected
Solution Approach 1:
The patent segments the network control function into separate modules: transport layer QoS control (TCP window adjustment) and network layer routing control (path selection based on QoS metrics). This segmentation allows each layer to operate independently with its own QoS-aware control mechanisms, maintaining simplicity while achieving adaptability to multi-tiered heterogeneous network environments through layered QoS management.
Data Source
AI summary
Traffic control systems, devices, methods, and instructions for an electronic apparatus according to example embodiments may include identifying a traffic session based on QoS characteristics information of a transport layer, generating transmission state information of the traffic session by performing analysis on the traffic session, and generating path state information of the traffic session based on QoS requirements information of the traffic session and routing cost information of a network layer, determining whether the transmission state information and the path state information satisfy a QoS traffic policy, and performing traffic control according to a result of the determination.