Functional Alias Resolution in Mission Critical Push to Talk Networks
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Solution Overview
Problem
In wireless communication networks, particularly in Future Railways Mobile Communication Systems (FRMCS), the existing technologies face challenges in efficiently routing calls using Functional Aliases (FAs), which are activated by users, to Mission Critical Push to Talk (MCPTT) identifiers.
Innovation Solution
An apparatus and method that receive a call request with address information containing a Functional Alias, send a request to a server to resolve the FA to MCPTT identifiers, receive the identifiers, and then send a call request to the intended clients using these identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Functional Alias is used for call routing, then ease of operation is improved, but device complexity increases due to resolution requirements
Solution Approach 1:
The patent introduces a resolution server as an intermediary component that handles the translation between Functional Aliases and MCPTT identifiers. This mediator absorbs the complexity of the resolution process, allowing the client devices to simply use Functional Aliases without needing to implement complex resolution logic themselves.
Solution Approach 2:
The resolution functionality is extracted from the client devices and placed in a dedicated resolution server. This separation allows client devices to remain simple while the server handles the complex task of resolving Functional Aliases to actual MCPTT identifiers, effectively moving the complexity burden from endpoints to the network infrastructure.
2Adaptability or versatility
If Functional Alias resolution is implemented, then adaptability is improved, but loss of time increases due to resolution overhead
Solution Approach 1:
The system performs preliminary actions by pre-establishing the resolution infrastructure and maintaining ready-to-use resolution mappings on the server side. When a call needs to be routed, the resolution process can begin immediately without waiting for setup, reducing the perceived delay despite the additional resolution step required.
Solution Approach 2:
The resolution server maintains continuous operation and keeps resolution mappings readily available, ensuring that the resolution process can proceed without interruption once initiated. This continuous readiness minimizes the time penalty by eliminating setup delays and ensuring immediate processing capability.
Data Source
AI summary
An apparatus comprising means for performing: receiving, from a first client, a call request comprising address information for calling at least one second client, the address information comprising a Functional Alias, wherein the Functional Alias is activated by the at least one second client; in response to receiving the call request at the apparatus, sending, to a server, a request to resolve the Functional Alias to at least one Mission Critical Push to Talk Identifier of the at least one second client that has activated the Functional Alias; receiving, at the apparatus from the server, the at least one Mission Critical Push to Talk Identifier of the at least one second client; sending, from the apparatus, a call request to the at least one second client using the at least one Mission Critical Push to Talk Identifier of the at least one second client.