Network Domain Selection Query Entity for Service Request Delivery
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Solution Overview
Problem
Current network domain selection methods fail to ensure a higher success ratio of connecting users, particularly when users lose network connection temporarily, as they do not account for situations where the user is unreachable in one domain but reachable in another, leading to reduced service experience.
Innovation Solution
A method and apparatus for service request delivery that includes a network domain selection query entity determining a terminating network domain and re-attempting delivery in another domain if the user is unreachable, with a Network Domain Selection entity (NeDS) managing this process and preventing call looping by using Call Forwarding on Mobile Subscriber Not Reachable (CFNRc) mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single terminating network domain is selected based on user registration status, then the network domain selection process is simple and fast, but the success ratio of connecting the called user decreases when the user is temporarily unreachable in one domain
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple terminating network domains for each user in the HLR database, rather than selecting a single domain at the time of call setup. When a call is initiated, the system queries the HLR to obtain the pre-configured list of domains and attempts connection in sequence, ensuring higher connection success rate without complicating the real-time call setup process.
Solution Approach 2:
The patent implements dynamics by making the terminating network domain selection adaptive and flexible. The system dynamically selects from multiple pre-configured domains based on real-time user availability status, allowing the connection path to change according to network conditions and user registration state, thereby improving reliability without requiring complex real-time decision algorithms.
2Reliability
If multiple network domains are attempted for service delivery, then the connection success rate improves, but the risk of call looping between domains increases
Solution Approach 1:
The patent prevents call looping by pre-configuring the multiple terminating network domains in the HLR database before call setup. This preliminary configuration establishes a predetermined sequence and set of domains to attempt, eliminating the possibility of infinite loops that could occur with dynamic domain selection during call setup. The system follows the pre-defined domain list, ensuring safe and controlled multi-domain attempts.
3Productivity
If network domain selection is based solely on user registration status, then the selection process is fast and efficient, but it fails to account for temporary network disconnections and reduces service experience
Solution Approach 1:
The patent resolves this contradiction by pre-configuring multiple terminating network domains in the HLR database during user registration or network setup, rather than making complex decisions during call setup. This preliminary action stores multiple domain options that can be quickly retrieved and attempted in sequence, maintaining fast selection speed while improving reliability through multi-domain fallback options.
Data Source
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AI summary
The present invention discloses a method for service request delivery, applied to a network system including a CS domain and IMS. The method includes that a network domain selection query entity acquires determination of a terminating network domain selection from a network domain selection entity (NeDS) in the network system upon receiving a service request destined to a served called user, and delivering the service request in a terminating network domain specified by the determination of a terminating network domain selection to connect the called user; the network domain selection query entity routes the service request to another terminating network domain to re-attempt the service request delivery when the called user is unreachable in the original terminating network domain. The present invention also discloses a communication apparatus and a network system.