Application Layer NAS Service Segmentation for Wireless Devices
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently communicating application layer non-access stratum (NAS) messages between wireless transmit and receive units (WTRUs) and network nodes, particularly in selecting the appropriate network nodes and configuring communication parameters.
Innovation Solution
The system determines the need for NAS network services, generates application layer NAS messages, and uses configuration information, analytics data, and policy data to select the appropriate network nodes and configure communication parameters for sending these messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NAS messages are communicated through dedicated modem interfaces, then communication reliability is improved, but system complexity and inflexibility increase
Solution Approach 1:
The patent segments the NAS communication function into independent network services that can be selectively accessed. The NAS message communication is divided into distinct service requests (mobility management, session management, etc.) that can be handled independently through the application layer, reducing overall system complexity while maintaining reliability for each specific function.
Solution Approach 2:
The patent introduces an application layer as an intermediary between the WTRU and network nodes for NAS message communication. This intermediary layer (using HTTP/RESTful protocols) mediates the communication, allowing flexible service access while maintaining the reliability requirements of NAS protocols through standardized interfaces and service management mechanisms.
2Stability of the object's composition
If mobility/location update and access functionality are coupled with network connectivity and session management, then system stability is improved, but service independence and flexibility deteriorate
Solution Approach 1:
The patent segments coupled functions into separate network services accessible through the application layer. Mobility management, session management, and other NAS functions are divided into independent service requests that can be accessed selectively, enabling service independence while maintaining system stability through standardized service interfaces.
Solution Approach 2:
The application layer serves as a universal interface that can access multiple different NAS services (mobility management, session management, location updates) through a common HTTP/RESTful protocol framework. This multi-functional approach enables flexible service access while maintaining stability through standardized communication mechanisms.
3Adaptability or versatility
If WTRUs use standardized protocols for NAS message communication, then interoperability is improved, but communication efficiency and flexibility deteriorate
Solution Approach 1:
The patent changes the communication parameters from traditional dedicated NAS protocols to application layer HTTP/RESTful protocols. This parameter change enables standardized interoperability through well-defined HTTP methods and status codes while improving communication efficiency through flexible service selection and reduced overhead for common operations.
Data Source
AI summary
The WTRU may determine that it has a need to request a NAS network service and may generate an application layer NAS message that comprises the request. The WTRU may determine, based on configuration information, one or more network nodes configured to provide NAS network services. The WTRU may determine, based on analytics data and policy data, a first network node in the one or more network nodes to which the application layer NAS message may be sent. The WTRU may determine, based on the policy data, one or more parameters for sending the application layer NAS message to the first network node. The WTRU may determine an endpoint address associated with the first network node. The WTRU may send the application layer NAS message to the first network node using the endpoint address and the one or more parameters.