Terminal-Based QoS Routing in Wireless Networks
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Solution Overview
Problem
Existing wireless communication networks face inefficiencies in routing packets due to lack of terminal involvement in route decision-making, leading to suboptimal QoS management and resource under-utilization, especially in mobile environments where network conditions and last hop wireless link states are not considered.
Innovation Solution
The method involves a wireless communications terminal receiving and processing network information about link states, including Quality-of-Service parameters, to select and dynamically adjust packet routes based on current network conditions and terminal-node link states, allowing for intelligent route selection that considers alternative access points and links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If routing decisions are made independently by network nodes without terminal involvement, then network control is simplified, but routing optimization and QoS management deteriorate
Solution Approach 1:
The patent introduces an intermediary routing information structure that carries QoS parameters and link state information between terminal and network nodes. This intermediary mechanism enables the terminal to participate in routing decisions without directly controlling network nodes, thus maintaining simplified network control while improving QoS management through informed terminal-side routing selections.
Solution Approach 2:
The patent implements feedback mechanisms where terminals receive routing information from network nodes, make routing decisions based on this information combined with local link state assessments, and subsequently provide feedback about route quality and conditions. This feedback loop enables continuous optimization of routing decisions while maintaining manageable network control complexity.
2Device complexity
If traditional routing methods are used without considering last hop wireless link states, then routing implementation is simpler, but routing performance and resource utilization deteriorate
Solution Approach 1:
The patent applies preliminary action by having terminals assess wireless link states and prepare routing information before actual data transmission. The terminal evaluates link quality metrics, predicts suitable routes, and pre-configures routing parameters, enabling optimized resource utilization without adding significant implementation complexity during actual data flow.
Solution Approach 2:
The patent enables self-service routing where terminals autonomously assess their own wireless link states, select appropriate routes based on local conditions and received routing information, and manage their own data transmission without requiring complex network-wide coordination. This self-service approach improves resource utilization while keeping implementation relatively simple.
3Reliability
If dynamic route selection based on real-time conditions is implemented, then QoS support and adaptability improve, but signaling overhead increases
Solution Approach 1:
The patent extracts essential routing and QoS information from complex signaling exchanges and consolidates it into compact routing information structures. By extracting only the critical parameters needed for routing decisions (such as link quality thresholds, preferred routes, and QoS requirements) rather than transmitting complete network state information, the patent achieves dynamic route selection with reduced signaling overhead.
4Adaptability or versatility
If terminals make routing decisions independently, then adaptability to mobile environments improves, but network coordination complexity increases
Solution Approach 1:
The patent implements dynamics by enabling terminals to dynamically adjust routing decisions based on real-time mobile environment conditions such as link quality variations, node mobility, and changing traffic patterns. The routing information received from network nodes serves as a framework that terminals can dynamically adapt to local conditions, achieving mobile environment adaptability without requiring complex real-time network coordination.
Data Source
AI summary
In a packet-based wireless access network, packet route selection is made in a terminal which communicates with the network via a wireless link. The route selection process uses information provided by the network relating to links in the network, and information available in the terminal relating to its wireless link to the network. Consequently the selected route may be via a wireless link between the terminal and a network node that does not provide the best signal strength but has the best prospect of providing a required Quality-of-Service (QoS) for a traffic flow. Monitoring enables the terminal to update the route selection to maintain the required QoS, despite changing conditions and handover, without a need for signalling messages.