WLAN Bearer Identification via GTP-U TEID Nesting
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Solution Overview
Problem
User terminals struggle to identify the correct bearer when communicating with cellular base stations via wireless local area network (WLAN) access points, as existing systems do not effectively manage data transmission across multiple bearers.
Innovation Solution
A communication system that includes a cellular base station, user terminal, and method for identifying bearers by encapsulating data packets with bearer IDs within IP or higher-layer headers, allowing the user terminal to correctly process and route data packets received through WLAN access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If user terminals communicate with cellular base stations via WLAN access points using multiple bearers, then data transmission capacity and network flexibility are improved, but the ability to identify and route correct bearers is lost
Solution Approach 1:
The patent introduces a tunnel endpoint identifier (TEID) as an intermediary element in the GTP-U header to bridge the identification gap between cellular bearers and WLAN data streams. This TEID acts as a mediator that carries bearer identification information through the WLAN access point, allowing the user terminal to correctly associate received data with the appropriate bearer despite the abstraction layer introduced by WLAN communication.
Solution Approach 2:
The patent implements a nested data structure where the GTP-U header (containing TEID) is embedded within the IP packet structure that travels through the WLAN network. This nested arrangement allows multiple layers of identification and routing information to be contained within a single data stream, enabling the user terminal to extract bearer identification from within the encapsulated packet structure.
2Adaptability or versatility
If data packets are transmitted through WLAN access points without bearer identification, then network flexibility and interoperability are improved, but data routing accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring the tunnel endpoint identifier (TEID) in the GTP-U header before data packets are transmitted through the WLAN access point. This advance preparation ensures that bearer identification information is already embedded in the data stream, allowing the user terminal to accurately route data without requiring complex real-time analysis or additional signaling during data transmission.
3Device complexity
If existing bearer identification methods are used without modification, then system simplicity is maintained, but compatibility with WLAN-based dual connectivity is lost
Solution Approach 1:
The patent enhances the existing GTP-U header structure by incorporating the tunnel endpoint identifier (TEID) field, which serves multiple functions: it maintains backward compatibility with existing cellular networks while simultaneously enabling WLAN-based dual connectivity. This multi-functional approach allows the same data structure to operate in both traditional cellular modes and new WLAN-integrated modes without requiring separate identification mechanisms.
Data Source
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AI summary
A communication system according to an embodiment includes: a user terminal including a communication unit; and a cellular base station configured to communicate with the user terminal via a WLAN access point using a plurality of bearers. The communication unit includes a communication unit configured to communicate with the cellular base station via the WLAN access point using one of the bearers identified in accordance with identification information for uniquely identifying each of the bearers.