Proxy Architecture for QoS Reservations in Satellite Networks
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Solution Overview
Problem
Current QoS mechanisms in satellite communication systems are inadequate for providing guaranteed quality of service, especially in bandwidth-constrained environments, as they rely on best-effort delivery models and require significant modifications to network nodes, which are not widely supported and do not ensure resource availability.
Innovation Solution
A proxy architecture is introduced that reserves bandwidth and establishes connections using an ITU H.323 proxy or a protocol-agnostic Dialer Proxy, dynamically configuring classification rules based on real-time protocol dataflows to ensure connection-oriented services, minimizing software upgrades and deployment costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RSVP protocol is used to request QoS resources, then resource reservation capability is improved, but deployment complexity increases and resource availability is not guaranteed
Solution Approach 1:
The patent introduces a gateway as an intermediary component that mediates between the best-effort IP network and the connection-oriented satellite network. The gateway performs QoS translation, flow classification, and connection management, eliminating the need to modify core network nodes while ensuring QoS guarantees for real-time applications.
Solution Approach 2:
The patent segments the network into distinct functional domains: the IP network layer handling best-effort delivery, the gateway layer handling QoS translation and connection management, and the satellite network layer providing guaranteed bandwidth. This segmentation allows each layer to operate independently with appropriate protocols.
2Device complexity
If best-effort delivery model is used, then network simplicity is maintained, but QoS guarantee for real-time applications deteriorates
Solution Approach 1:
The gateway acts as a mediator that translates best-effort IP packets into connection-oriented satellite network traffic. It classifies flows, establishes connections with guaranteed bandwidth, and maintains QoS policies without requiring modification of the simple best-effort IP infrastructure.
Solution Approach 2:
The patent changes the service model parameter from best-effort to connection-oriented with guaranteed QoS at the gateway boundary. This parameter change allows the network to support both simple best-effort traffic and QoS-guaranteed real-time traffic through the same infrastructure.
3Reliability
If QoS mechanisms are deployed in bandwidth-constrained satellite systems, then service quality is improved, but system complexity and deployment cost increase
Solution Approach 1:
The gateway serves as a cost-effective intermediary that provides QoS functionality without requiring expensive modifications to satellite network infrastructure. By concentrating QoS capabilities at the gateway boundary, the patent avoids the high cost of deploying QoS mechanisms throughout the entire satellite network.
Solution Approach 2:
The gateway is designed as a multi-functional device that performs QoS translation, flow classification, connection management, and policy enforcement. This universal approach consolidates multiple QoS functions into a single platform, reducing overall deployment cost and complexity.
Data Source
AI summary
An approach is provided for providing quality of service reservations in a packet-based radio communication network is disclosed. Connection information including connection rate is extracted from a dataflow from an application requesting connection-oriented service. A request message is sent to a proxy for establishing a connection based on the connection information over the network, wherein the proxy configures a classification rule based on flow criteria from the request message and accordingly initiates establishment of the connection over the network to a destination terminal. A confirmation that the connection can be established is selectively received according to the connection information, wherein the dataflow satisfying the flow criteria from the application is transported over the established connection to the destination terminal. This approach as particular applicability to shared capacity systems, such as a satellite communication system.