Gateway Node EMLPP Call Prioritization for Called Party
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Solution Overview
Problem
Current Enhanced Multi-Level Precedence and Preemption (EMLPP) features in wireless communication systems are limited to privileged subscribers and controlled by the calling party, failing to provide prioritization based on the called party's preferences, leading to issues with call drops during network congestion.
Innovation Solution
A method where a gateway node converts incoming calls to EMLPP calls in the terminating network based on the called party's registered subscriber numbers, allowing the called party to prioritize calls and receive priority features like faster call setup, queuing, and pre-emption, without reserving resources in the originating network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EMLPP features are provided to all subscribers based on called party preferences, then call prioritization and quality of service are improved, but device complexity and network configuration complexity increase
Solution Approach 1:
The called party pre-registers a set of priority subscriber numbers in the gateway node before actual call scenarios occur. This preliminary registration stores the mapping between called party identifiers and their preferred priority numbers, so that when an incoming call arrives, the gateway node can quickly determine whether to apply EMLPP treatment without complex real-time decision-making, thus improving reliability while keeping device complexity manageable
Solution Approach 2:
The gateway node acts as an intermediary between the originating network and the terminating network. It receives incoming calls, checks whether the calling number matches any registered priority numbers for the called party, and selectively converts normal calls to EMLPP calls only when needed. This intermediary role allows the system to provide call prioritization based on called party preferences without requiring complex configurations throughout the entire network, resolving the contradiction between improved reliability and reduced device complexity
2Loss of energy
If EMLPP conversion is applied selectively based on registered numbers, then resource usage is optimized, but measurement precision and detection difficulty increase
Solution Approach 1:
The system implements a feedback mechanism where the gateway node checks the registered priority numbers list for each incoming call, determines whether EMLPP conversion is needed, and applies the appropriate treatment. This feedback loop ensures that EMLPP features are activated only when necessary (when the calling number matches a registered priority number), optimizing network resource usage by avoiding unnecessary resource reservation for non-priority calls while maintaining simple detection through direct comparison of phone numbers
3Loss of time
If incoming calls are converted to EMLPP calls in terminating network, then call setup time is reduced for priority calls, but device complexity and network complexity increase
Solution Approach 1:
The gateway node applies EMLPP conversion locally and selectively only to specific incoming calls that match the called party's registered priority numbers, rather than applying it universally to all calls. This local quality approach means that the complexity of EMLPP handling is concentrated only where needed (in the gateway node for matching calls), allowing priority calls to benefit from faster setup times while avoiding the need for complex EMLPP configurations throughout the entire network infrastructure
Data Source
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AI summary
A method performed by a gateway node, for handling an incoming call to a first user equipment is provided. The gateway node serves the first user equipment in a terminating network. The first user equipment is a called party of the incoming call. The gateway node obtains (402) information about whether or not the incoming call relates to a subscriber number that is comprised in a registered set of subscriber numbers registered by the first user equipment. When the incoming call relates to the registered set of subscriber numbers, the gateway node converts (403) the incoming call to an Enhanced Multi-level Precedence and Pre-emption service, EMLPP, call in the terminating network at the gateway node. The EMLPP call is a prioritized call achieving priority features over other calls in the terminating network. The priority features comprises: - Faster Call Setup Time - Queuing Capabilities - Precedence Capabilities - Pre-emption Capabilities.