Dynamic QoS Negotiation in Next Generation Networks
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Solution Overview
Problem
Current QoS control methods in NGN environments are inadequate for ensuring end-to-end quality of service due to limitations in user terminals' ability to initiate explicit QoS requests, particularly for those not supporting RSVP/NSIS protocols, and the inability of DiffServ to accurately reflect user QoS parameters, leading to suboptimal resource allocation and service differentiation.
Innovation Solution
A dynamic QoS negotiation system that utilizes the Resource and Admission Control Subsystem (RACS) to obtain and process QoS requirement parameters, interact with user terminals and network entities, and allocate resources based on user profiles and network availability, ensuring end-to-end QoS assurance through admission control decision parameters and transport functional entity execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RSVP/NSIS protocol is used for QoS control, then explicit QoS requests can be sent to the network, but user terminals must support these protocols which limits compatibility
Solution Approach 1:
The patent introduces a service layer intermediary that translates QoS requirements from terminals into network-understandable formats. This mediator enables terminals without RSVP/NSIS support to communicate QoS needs to the network through standard IP packets, resolving the compatibility issue while maintaining QoS assurance capabilities.
Solution Approach 2:
The patent replaces the protocol-dependent mechanical system (RSVP/NSIS) with a protocol-agnostic approach using standard IP packet fields. Instead of requiring specialized protocol support in terminals, the solution uses existing IP packet structures to carry QoS information, substituting the need for complex terminal protocol implementations.
2Device complexity
If DiffServ marking is used for QoS control, then network resource allocation can be simplified, but user QoS parameters cannot be accurately reflected
Solution Approach 1:
The patent segments QoS control into two parts: coarse-grained DiffServ marking for network resource allocation (maintaining low complexity) and fine-grained QoS parameter specification in the service layer (achieving high precision). This segmentation allows both simplified network equipment and accurate QoS parameter reflection to coexist.
Solution Approach 2:
The patent adds another dimension to QoS control by introducing service layer signaling alongside the traditional network layer DiffServ approach. This multi-dimensional approach allows DiffServ to handle resource allocation while the service layer carries precise QoS parameters, resolving the contradiction between simplicity and accuracy.
3Ease of operation
If static QoS configuration is used, then network management is simplified, but dynamic network conditions cannot be adapted to
Solution Approach 1:
The patent introduces dynamic QoS negotiation mechanisms that allow QoS parameters to be adjusted based on real-time network conditions while maintaining ease of management through standardized negotiation procedures. The system dynamically adapts QoS allocations based on network status, user profiles, and current resource availability, resolving the contradiction between static management simplicity and dynamic adaptability.
4Reliability
If resource reservation is performed for each user service, then end-to-end QoS can be ensured, but network resource overhead increases
Solution Approach 1:
The patent merges resource reservation for multiple services sharing common QoS requirements into aggregated reservations. By combining reservation requests for services with similar characteristics, the system reduces the total number of reservation operations and associated overhead while maintaining end-to-end QoS guarantees for each individual service.
Data Source
AI summary
The present invention discloses a system and a method of dynamic QoS negotiation in NGN. The Resource and Admission Control Subsystem (RACS) provides intercommunication interfaces with Transport functional (TF) entity, Service Control Functional (SCF) entities, and Network Attachment Subsystem (NASS), and thereby, when a user terminal in NGN is to develop a service with QoS requirement, the RACS can obtain the QoS requirement parameters of a service, determine the admission control decision parameters in accordance with the QoS requirement parameters, and the RACS send the determined admission control decision parameters to the TF entity for execution, such that the QoS assurance for the service is realized.The present invention allows an end-to-end QoS negotiation in NGN in accordance with the availability of current transport network resources, and thereby can effectively improve the transport resource utilities. Therefore, the present invention can effectively ensure QoS of service transported in NGN.