Wireless Device PDU Session Requests for Network Slice Continuity
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Solution Overview
Problem
Existing 5G systems face challenges in efficiently managing network slicing and user plane connectivity, particularly in handling multiple access types and ensuring seamless service continuity and QoS across diverse network environments.
Innovation Solution
The implementation of enhanced network functions and protocols in 5G systems, including AMF, SMF, UPF, and PCF, to manage network slicing, QoS flows, and user plane connectivity, enabling unified policy frameworks and edge computing to support diverse access networks and local data networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network slicing is implemented to support diverse access types, then service continuity and QoS are improved, but device complexity and protocol management overhead increase
Solution Approach 1:
The patent segments the network into multiple network slices, each dedicated to specific access types (3GPP and non-3GPP) and service requirements. This segmentation allows independent management of each slice, improving service continuity for specific access types without requiring the entire network to handle all complexities, thus resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The patent introduces a protocol header as an intermediary element that carries slice-specific information between the wireless device and the core network. This intermediary enables automated slice identification and routing without requiring complex manual configuration or intervention, reducing protocol management overhead while maintaining service continuity.
2Reliability
If unified policy frameworks are implemented across diverse access networks, then QoS consistency is improved, but device complexity and implementation overhead increase
Solution Approach 1:
The patent implements a universal protocol header structure that can carry QoS and policy information across different access types (3GPP and non-3GPP). This multi-functional header design allows the same mechanism to serve multiple access networks uniformly, achieving QoS consistency without requiring separate complex policy management systems for each access type.
Solution Approach 2:
The patent uses parameter encoding within the protocol header to represent different QoS requirements and policy conditions. By changing and manipulating these parameters dynamically based on the access type and service requirements, the system achieves QoS consistency across diverse networks while keeping the underlying implementation relatively simple and standardized.
3Speed
If automated slice routing is implemented based on protocol headers, then service delivery speed is improved, but measurement precision and slice identification accuracy requirements increase
Solution Approach 1:
The patent embeds slice identification information in the protocol header at the earliest stage of communication, before actual data transmission begins. This preliminary action of pre-identifying and tagging the slice in the header enables automated routing decisions to be made immediately upon receiving the packet, achieving fast service delivery without requiring complex real-time analysis that would demand extremely high measurement precision.
Data Source
AI summary
A method can include sending, by a wireless device to an access and mobility management function (AMF) a non-access stratum (NAS) message indicating a request to establish a packet data unit (PDU) session to join a group communication session. The NAS message can include an identifier of the group communication session, an identifier of a network slice, and a protocol configuration option information. The method can also include receiving, by the wireless device from the AMF, a response message indicating acceptance of the request.