Convergent Transmission System for Cellular WLAN Data Offloading
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Solution Overview
Problem
Existing cellular communication systems face increased pressure from data traffic, leading to higher construction costs and reduced quality of service due to the independent nature of WLAN networks, which require new network infrastructure and suffer from uncontrollable transmission delays.
Innovation Solution
A convergent transmission system that integrates a data offloading and converging node with cellular and WLAN access points, allowing for the negotiation of data offloading policies to configure cellular radio bearers as WLAN links, enabling transparent data transmission without modifying the cellular network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If WLAN is constructed as a completely independent network to offload cellular data traffic, then data transmission capacity is improved, but network construction period and cost increase greatly
Solution Approach 1:
The patent merges the WLAN network with the cellular network by establishing an S1 interface connection between the WLAN controller and the EPC (Evolved Packet Core). This integration allows WLAN to offload data traffic while sharing the cellular network's core infrastructure, thereby improving data transmission capacity without requiring a completely separate network construction, thus reducing both time and cost.
2Productivity
If WLAN is constructed as a completely independent network to offload cellular data traffic, then data transmission capacity is improved, but network construction cost increases greatly
Solution Approach 1:
The patent merges the WLAN network with the cellular network by establishing an S1 interface connection between the WLAN controller and the EPC (Evolved Packet Core). This integration allows WLAN to offload data traffic while sharing the cellular network's core infrastructure, thereby improving data transmission capacity without requiring a completely separate network construction, thus reducing both time and cost.
3Adaptability or versatility
If WLAN operates as an independent network with no fixed network resources, then network flexibility is improved, but transmission delay control deteriorates
Solution Approach 1:
The patent introduces an S1 interface as an intermediary connection between the WLAN controller and the EPC. This intermediary mechanism enables the cellular network's core infrastructure to mediate and control the WLAN's data transmission, ensuring that transmission delays are managed and QoS requirements are met while maintaining WLAN's operational flexibility.
4Adaptability or versatility
If separate transmission networks are constructed for cellular and WLAN, then network independence is improved, but quality of service deteriorates due to packet disorder
Solution Approach 1:
The patent merges the WLAN network with the cellular network at the core level through the S1 interface connection to the EPC. This integration ensures that IP packets transmitted over both cellular and WLAN networks are routed through a unified core infrastructure, preventing packet disorder and maintaining consistent QoS across both networks while preserving their operational independence at the access level.
Data Source
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AI summary
A convergent transmission system includes a data offloading and converging node, a cellular access point, and a wireless local area network (WLAN) access point. The data offloading and converging node is configured to: negotiate with a user equipment (UE) to determine a data offloading policy; according to the data offloading policy determined by negotiating with the UE, use a WLAN radio bearer to transmit a part of user data, where the WLAN radio bearer is a result of configuring a part of radio bearers of a cellular system as WLAN radio links; and use a remaining radio bearer of the cellular system to transmit a remaining part of the user data, where the radio bearers are a radio part of bearer channels of the cellular system, and the bearer channels of the cellular system are created through control plane signaling of the cellular system; the WLAN access point is configured to work with the UE and the data offloading and converging node to transmit the part of the user data; and the cellular access point is configured to work with the UE and the data offloading and converging node to transmit the remaining part of the user data.