PD-FE Selection in NGN Resource Control
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Solution Overview
Problem
In the resource and admission control system of Next Generation Networks (NGN), the Policy Decision Functional Entity (PD-FE) cannot be accurately selected by the Transport Resource Control Functional Entity (TRC-FE) or Policy Enforcement Functional Entity (PE-FE) during the resource reservation process in the PULL mode, leading to inefficiencies in QoS resource control.
Innovation Solution
The method involves selecting the PD-FE based on stored identification information or static configuration, where the TRC-FE or PE-FE determines the appropriate PD-FE to send a resource decision request message, and if no specific PD-FE is found, the request is sent to all PD-FEs for processing, with each PD-FE determining relevance and performing necessary actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the TRC-FE or PE-FE sends resource decision requests to all PD-FEs when unable to identify the correct one, then the resource reservation process can proceed, but the control efficiency decreases due to unnecessary communications with irrelevant PD-FEs
Solution Approach 1:
The patent applies preliminary action by establishing identification information mapping relationships between PD-FEs and CPEs in advance. The TRC-FE or PE-FE stores the correspondence between PD-FE identification information and CPE identification information before the resource reservation process occurs. When a resource reservation request arrives, the system can directly query the pre-established mapping to determine the correct PD-FE, avoiding the need to broadcast requests to all PD-FEs and significantly improving control efficiency.
2Measurement precision
If the system stores and queries PD-FE identification information to accurately select the correct PD-FE, then the control precision improves, but the system complexity increases due to additional storage and query mechanisms
Solution Approach 1:
The patent introduces an identification information mapping relationship as an intermediary between the TRC-FE/PE-FE and the PD-FE selection process. This mapping relationship acts as a lookup table that simplifies the selection process: instead of implementing complex selection logic or broadcasting to all PD-FEs, the system merely needs to query the pre-established mapping using CPE identification information as the key. This intermediary structure achieves high selection accuracy while maintaining relatively simple system architecture.
Data Source
AI summary
The present invention discloses a method for selecting policy decision functional entity in the Resource and Admission Control System. The method includes that: for resource and admission control in the PULL mode, after the Transport Resource Control Function Entity (TRC-FE) receives a resource request message from the Customer Premises Equipment (CPE) or after the Policy Enforcement Function Entity (PE-FE) receives a transport layer signaling sent by CPE, if the TRC-FE or PE-FE is interacting with more than one Policy Decision Functional Entities (PD-FEs), the TRC-FE or the PE-FE may select a PD-FE according to the stored identification information of PD-FE or statically configured PD-FE, and send a resource decision request message to the selected PD-FE. With the application of the present invention, in resource and admission control in the PULL mode, after receiving the resource request initiated by CPE through the transport layer signaling message, the TRC-FE or PE-FE may select the exact PD-FE to implement the resource reservation process, thereby resolving the problem in prior art that during the resource and admission control process the TRC-FE or PE-FE can not select the exact PD-FE to send resource decision requests.