Network Entity Retransmits Paging Response to Original MSC
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Solution Overview
Problem
Existing wireless telecommunication systems face challenges in efficiently managing mobile terminated calls when one of the mobile switching centers in a pool is out of service, leading to potential call failures and inefficient use of air interface resources.
Innovation Solution
A network entity that receives a paging response from a mobile station re-transmits the paging response to the original mobile switching center that initiated the request, using mobile identity information and a look-up table to identify the correct center, even if the initially registered MSC is out of service, thereby ensuring seamless call termination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RNC routes the paging response to any MSC in the MSC pool when the registered MSC is out of service, then the paging response can be delivered to an available MSC, but the attempt to establish the mobile terminated call may fail because the paging response is transmitted to an MSC that has not been involved in establishing the call
Solution Approach 1:
The patent introduces a network proxy entity as an intermediary between the RNC and MSCs. This proxy entity receives the paging response from the RNC, identifies the original MSC that initiated the paging request using mobile identity information, and re-transmits the paging response to the correct MSC. This intermediary solution resolves the contradiction by ensuring reliable call establishment while managing the complexity centrally in the proxy entity rather than distributing it across all network elements.
Solution Approach 2:
The patent implements a feedback mechanism where the network proxy entity uses mobile identity information from the paging response to trace back and identify which MSC originally initiated the paging request. This feedback loop ensures that the paging response is routed back to the correct MSC, maintaining call establishment reliability while using structured information feedback to manage system complexity.
2Productivity
If the paging response is transmitted to an MSC that has not been involved in establishing the call, then the network can handle the paging response with available MSCs, but the mobile terminated call establishment fails
Solution Approach 1:
The network proxy entity acts as a mediator that receives paging responses from any available MSC, identifies the original calling MSC using mobile identity information, and re-transmits the response to the correct MSC. This ensures both high productivity in delivering paging responses to available MSCs and high reliability in maintaining call termination reliability by ensuring responses reach the correct MSC.
Solution Approach 2:
The patent uses mobile identity information as a form of digital copy or key that allows the network proxy entity to identify and route the paging response to the correct MSC. This copying mechanism enables efficient and reliable routing without requiring complex real-time coordination between MSCs.
3Adaptability or versatility
If the network routes paging responses to any available MSC when the registered MSC is out of service, then resource utilization improves, but call establishment fails due to incorrect MSC routing
Solution Approach 1:
The network proxy entity serves as an adaptable intermediary that can handle paging responses from any available MSC while maintaining reliable call establishment. It uses mobile identity information to dynamically route responses to the correct MSC, providing both adaptability to MSC failures and reliability in call success.
Solution Approach 2:
The system uses feedback through mobile identity information to maintain reliability while adapting to MSC failures. The proxy entity receives paging responses, uses the mobile identity information to identify the original MSC, and re-routes the response accordingly, ensuring call success while adapting to the current state of MSC availability.
Data Source
AI summary
The present invention relates to a network entity for handling communications towards a mobile station over a communication network, the mobile station being capable of receiving a paging request from a mobile switching center of a pool of mobile switching centers, and, in response to the paging request, of transmitting a paging response over the communication network. The network entity comprises a receiver (101) for receiving the paging response, the paging response comprising mobile identity information identifying the mobile station, a processor (103) for identifying the mobile switching center to which to re-transmit the paging response upon the basis of the mobile identity information, and a transmitter (105) for retransmitting the paging response to the identified mobile switching center.