Non-3GPP Access Without NAS for Heterogeneous Session Control
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Solution Overview
Problem
The increasing demand for enhanced wireless communication systems, particularly in 5G and beyond, necessitates improved schemes for controlling sessions in multi-access environments to manage the growing number of connected devices and diverse service requirements.
Innovation Solution
A method and apparatus for heterogeneous network selection control, involving a user equipment (UE) and access and mobility management function (AMF) that support non-3GPP access without non-access stratum (NAS), enabling efficient transmission and reception of registration and session establishment requests through non-3GPP access, with associated policy and route selection information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-3GPP access without NAS is supported, then network access flexibility and service diversity are improved, but protocol complexity and control overhead increase
Solution Approach 1:
The patent introduces a proxy mobility management function as an intermediary entity that mediates between non-3GPP access networks and the 5G core network. This proxy entity handles protocol translation and control signaling, allowing non-3GPP devices to access 5G services without implementing the full complex 3GPP NAS protocol stack, thus reducing device complexity while maintaining access flexibility
Solution Approach 2:
The patent segments the mobility management functionality by separating the proxy mobility management function from the traditional AMF. This segmentation allows the complex protocol handling to be isolated in a dedicated proxy entity, while other network elements can operate with simplified procedures, thereby managing overall system complexity while supporting diverse access types
2Adaptability or versatility
If heterogeneous network access is enabled, then service coverage and user convenience are improved, but session management complexity and network control difficulty increase
Solution Approach 1:
The proxy mobility management function serves as an intermediary that centralizes session management for heterogeneous access networks. It handles session establishment, modification, and termination across different access types (3GPP and non-3GPP), providing unified session control that simplifies network management while expanding service coverage to multiple access technologies
Solution Approach 2:
The patent implements a universal session management approach where the proxy mobility management function handles multiple access types through a unified interface and common procedures. This multi-functional design allows the same session management mechanisms to serve both 3GPP and non-3GPP accesses, reducing the need for separate complex management systems for each access type
Data Source
AI summary
Provided is a 5th-generation (5G) or 6th-generation (6G) communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes transmitting, to an access and mobility management function (AMF), a registration request message including information indicating that the UE supports a non-3rd generation partnership project (3GPP) access without non-access stratum (NAS), receiving, from the AMF, user equipment route selection policy (URSP) rule information including a route selection descriptor associated with the non-3GPP access without NAS, and transmitting, to the AMF, a session establishment request message including information on a capability of the non-3GPP access without NAS.