PDU Session Connect Protocol Signaling for MA Traffic Steering
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Solution Overview
Problem
Existing wireless communication systems lack a mechanism for user equipment (UE) to specify the supported or preferred connect protocol during the establishment of multiple access PDU session user plane resources, hindering efficient traffic steering, switching, and splitting.
Innovation Solution
The UE transmits a request message indicating the supported or preferred connect protocol, such as UDP, IP, or TCP, within a standalone or part of an information element, allowing the network to establish MA PDU session resources based on these preferences, enabling efficient traffic management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE transmits a request message with connect protocol indication, then the network can establish MA PDU session resources aligned with UE capabilities, but the signaling message complexity increases
Solution Approach 1:
The connect protocol indication is nested within existing information element structures (e.g., Protocol Configuration Options containers) rather than creating standalone messages. This allows the protocol indication to be embedded within the existing PDU session establishment request framework, reducing signaling overhead while maintaining the capability to specify connect protocols.
Solution Approach 2:
The information element structure is designed to serve multiple functions: it carries both the connect protocol indication and other session configuration parameters. This multi-functional approach eliminates the need for separate dedicated signaling messages for protocol specification, thereby reducing overall signaling complexity while maintaining adaptability.
2Measurement precision
If the connect protocol indication is included in a standalone information element, then the protocol specification is clear and unambiguous, but the signaling overhead increases
Solution Approach 1:
The connect protocol indication is merged with existing session management information elements rather than being transmitted as a separate standalone element. This combining approach maintains clear protocol specification through structured field definitions while reducing the total volume of signaling data by eliminating redundant message structures.
3Productivity
If the network establishes MA PDU session resources based on UE preferences, then traffic steering efficiency is improved, but the session establishment processing time increases
Solution Approach 1:
The UE includes its connect protocol preferences in the initial session establishment request message, allowing the network to pre-configure appropriate MA PDU session resources with the correct protocol stack before actual data transmission begins. This preliminary specification eliminates the need for subsequent protocol negotiation or resource reconfiguration, thereby maintaining fast session establishment while ensuring optimal traffic steering capability.
Data Source
AI summary
Various aspects of the present disclosure relate to communicating a connect protocol for a protocol data unit (PDU) session or a packet data network (PDN) connection. A user equipment (UE) transmits a request message to establish a PDU session or a PDN connection, where the request message includes an indication of a connect protocol for the PDU session or the PDN connection, and the indication is included in at least one of a standalone information element or a part of an information element. The UE receives a response message based at least in part on the request message, where the response includes one or more rules for the PDU session or the PDN connection.