Core Network Server Capability Forwarding for Wireless Handover
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Solution Overview
Problem
In wireless communications networks, user equipment may experience a lack of customised alerting notifications during handover from a packet switched domain to a circuit switched domain due to the mobility controller not receiving indications of the user equipment's capabilities, leading to an unsatisfactory user experience and potential loss of revenue.
Innovation Solution
A method where the user equipment sends a message to the core network server indicating its customised alerting notification capability, and the core network server forwards this information to the mobility controller during the handover process, ensuring the mobility controller can deliver customised alerting notifications even when the call is initiated in a different radio access network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment initiates a call in the first radio access network (packet switched domain), then the call can be established using modern packet switched technology, but the mobility controller in the second radio access network does not receive capability indications, resulting in loss of customised alerting notification capability
Solution Approach 1:
The core network server stores the customised alerting notification capability indication received from the user equipment in advance, before handover occurs. This preliminary storage ensures that when handover to the second radio access network takes place, the capability information is already available and can be immediately forwarded to the mobility controller, preventing any loss of information during the transition.
Solution Approach 2:
The core network server acts as an intermediary between the user equipment and the mobility controller. It receives and stores the capability indication from the user equipment in the packet switched domain, then forwards this information to the mobility controller in the circuit switched domain during handover. This intermediary role ensures seamless information transfer across different network domains.
2Productivity
If handover occurs during the alerting phase of a call, then call continuity can be maintained between radio access networks, but customised alerting notifications are lost because the mobility controller lacks capability information
Solution Approach 1:
The system performs preliminary storage of the customised alerting notification capability indication in the core network server before handover occurs. This ensures that when handover during the alerting phase takes place, the capability information is already prepared and can be immediately transmitted to the mobility controller, maintaining both call continuity and notification service reliability.
Solution Approach 2:
The core network server serves as an intermediary that bridges the packet switched and circuit switched domains during handover. It captures the capability indication in the packet switched domain and delivers it to the mobility controller in the circuit switched domain, ensuring that customised alerting notifications are preserved throughout the handover process.
3Device complexity
If the mobility controller does not receive capability indications, then the network architecture remains simple, but customised alerting notifications cannot be provided during handover
Solution Approach 1:
The core network server acts as an intermediary that solves the complexity issue by centralizing the storage and forwarding of capability information. Instead of modifying the mobility controller to actively seek capability information, the core network server proactively stores and delivers the information, maintaining architectural simplicity while ensuring reliable notification delivery.
Solution Approach 2:
The core network server performs self-service by automatically storing the capability indication when received from the user equipment and then autonomously forwarding it to the mobility controller during handover. This self-service mechanism eliminates the need for additional complexity in the mobility controller while ensuring capability information is preserved.
Data Source
AI summary
A customized alerting notification is provided to a user equipment (2) in a wireless communications network comprising a first radio access network (26) and a second radio access network (24). A first message (6, 18, 20) is received from the user equipment at a core network server (4, 16), of the first radio access network on attachment of the user equipment to the first radio access network, the message comprising an indication of a customized alerting notification capability of the user equipment in the second radio access network. In response to initiation of handover of the user equipment from the first radio access network to the second radio access network during an alerting phase of a call initiated from the user equipment using the first radio access network, a second message (12, 22) comprising the indication is sent from the core network server of the first radio access network to a mobility controller (10) coupled with the second radio access network. FIG. 3 to accompany the abstract.