Network Handover TCP Four-Tuple Conversion
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Solution Overview
Problem
Existing network handover methods require base stations from different networks to perform frame synchronization through a gateway, which is time-consuming and complicates the handover process, disrupting user experience.
Innovation Solution
A method where a terminal converts data including an initial TCP four-tuple into a first and then a second TCP four-tuple, with the gateway forwarding these data sets based on mapping information provided by a controller, ensuring continuous data transmission without synchronization issues during network handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations from different networks perform frame synchronization through a gateway during network handover, then connection continuity is maintained, but handover time increases and process complexity increases
Solution Approach 1:
The patent extracts the frame synchronization function from the gateway and relocates it to the base stations themselves. Each base station independently performs frame synchronization with the target base station directly, removing the gateway as an intermediate participant in the synchronization process. This extraction eliminates the time-consuming gateway-mediated synchronization while maintaining connection continuity.
Solution Approach 2:
The patent segments the handover process into independent components: the terminal initiates handover, base stations perform direct frame synchronization, and the gateway handles only data forwarding. This segmentation allows base stations to synchronize independently without waiting for gateway coordination, reducing overall handover time while maintaining reliability.
2Reliability
If base stations from different networks perform frame synchronization through a gateway during network handover, then connection continuity is maintained, but process complexity increases
Solution Approach 1:
The patent removes the gateway's involvement in frame synchronization, extracting this function from the complex multi-party coordination process. Base stations directly exchange synchronization information, simplifying the handover process from a four-party interaction (terminal, source base station, target base station, gateway) to a more streamlined process where synchronization occurs independently between base stations.
Solution Approach 2:
Base stations perform frame synchronization autonomously without requiring gateway coordination. Each base station independently establishes synchronization with the target base station, enabling self-service synchronization that eliminates complex inter-coordination protocols and reduces overall process complexity.
3Ease of operation
If the terminal uses only one type of network at a time, then network management is simplified, but seamless handover between networks cannot be achieved
Solution Approach 1:
The patent implements dynamic network switching capability where the terminal can transition between different network types (3G, WiFi, WiMAX) based on availability and performance requirements. The system dynamically manages multiple network interfaces, allowing seamless handover while maintaining simplified operation through automated selection and switching protocols.
Solution Approach 2:
The terminal is designed with multi-functionality to support multiple network types simultaneously, with a unified management interface that abstracts the complexity of multi-network operations. This universal design allows the terminal to operate on any network type while maintaining consistent user experience and simplified management through a single control plane.
Data Source
AI summary
A network handover method, a terminal, a controller, a gateway, and a system. The method includes: when a terminal accesses a first network, converting data including an initial TCP four-tuple into data including a first TCP four-tuple, and sending the data to a gateway; and after handing over from the first network to a second network, converting data including the initial TCP four-tuple into data including a second TCP four-tuple, and sending the data including the second TCP four-tuple to the gateway. This achieves objectives of preventing a connection from being interrupted before and after the network handover, improving use experience, and reducing complexity of a network handover process.