AT Command Extension for IMS Service Control
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Solution Overview
Problem
Conventional AT commands are limited in controlling Internet Protocol (IP) Multimedia Subsystem (IMS) services, as they cannot specify the type of IMS service, media, media quality, encoding/decoding location, supported services, media configuration for incoming calls, or modify ongoing communication sessions.
Innovation Solution
New AT commands are introduced to control IMS services, allowing specification of media data encoding and decoding locations, identifying IMS service instances, configuring media for incoming calls, and modifying ongoing sessions, with a linear and simple syntax for easy parsing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional AT commands are used to control communication services, then the device can control single voice calls and basic services, but the device cannot control IMS services, specify service types, configure media, or manage multiple service instances
Solution Approach 1:
The patent extends the conventional AT command set to provide universal control over multiple communication services including IMS services, voice calls, and data sessions. The message generator is configured to generate messages comprising commands that can control different service types (voice, video, data) through a unified command interface, allowing single AT commands to manage multiple service instances and configurations that were previously requiring separate proprietary command sets
Solution Approach 2:
The patent segments the control of communication services into distinct command parameters within the AT command framework. Each service type (IMS, voice, data) and configuration aspect (media, quality, encoding/decoding location) can be independently specified through separate command parameters, allowing granular control while maintaining a unified command structure that avoids creating entirely new complex protocols
2Adaptability or versatility
If new AT commands are introduced to control IMS services with detailed specifications, then the device can specify service types, media, quality, and encoding/decoding locations, but the command syntax and parsing complexity increases
Solution Approach 1:
The patent introduces new parameters within the existing AT command structure to specify service types, media characteristics, quality requirements, and encoding/decoding locations. These parameters are integrated into familiar command formats, allowing detailed service configuration without requiring completely new command syntax. The parameters can be optionally included based on service requirements, maintaining simplicity for basic operations while enabling precision when needed
Solution Approach 2:
The message generator acts as an intermediary between the terminal equipment and the modem circuit, translating high-level service requirements into appropriately formatted AT commands. This intermediary layer handles the complexity of parameter interpretation and command construction, shielding the user from parsing difficulties while enabling precise service configuration through a standardized interface
3Reliability
If conventional AT commands are used, then the device can control basic communication functions, but the device cannot identify supported services, configure media for incoming calls, or modify ongoing sessions
Solution Approach 1:
The extended AT command set provides universal control capabilities across all communication service types including service identification, incoming call media configuration, and ongoing session modification. A single command framework handles diverse operations (service listing, configuration, control) that would otherwise require multiple specialized command sets, achieving comprehensive service control without proportionally increasing overall system complexity
Data Source
AI summary
A communication device may include a message generator configured to generate a message in accordance with a command set to use a communication service provided by a communication session setup protocol; and a modem circuit coupled to the message generator and configured to operate in accordance with the message generated by the message generator; wherein the message generator is configured to generate the message comprising a command to at least one of control or establish an Internet Protocol Multimedia Subsystem service.