Data Offloading via Secondary Link on Radio Link Failure
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Solution Overview
Problem
Current mobile data offloading methods in wireless communication networks face challenges in reducing time delays and improving data transfer efficiency due to radio link failures, which can lead to increased investment and maintenance costs as network operators deploy more base stations to alleviate congestion.
Innovation Solution
A method and device for transferring data that involves offloading data from a primary link to a secondary link upon detecting a radio link failure, using an RLF indication message to notify the base station and request reconfiguration of radio bearers, thereby transferring at least a portion of the data on the secondary link, reducing time delays and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network operators deploy more base stations to improve network capacity and alleviate congestion, then network capacity and coverage are improved, but investment cost and maintenance cost increase
Solution Approach 1:
The patent combines multiple transmission links (primary LTE link and secondary offloading link) into a unified communication system. When the primary link fails, the secondary link takes over seamlessly, allowing operators to leverage existing infrastructure (WiFi, home base stations, 1MB networks) rather than deploying additional base stations, thus maintaining network capacity while reducing costs.
Solution Approach 2:
The patent creates a multi-functional offloading mechanism that can utilize various supplementary network technologies (WiFi, home base stations, 1MB networks) as alternative transmission paths. This universal approach allows the system to adapt to different available resources without requiring dedicated infrastructure for each scenario, reducing overall investment requirements.
2Quantity of substance
If data offloading is implemented using existing supplementary network technologies, then investment cost is reduced, but time delay increases due to radio link failure and reestablishment procedures
Solution Approach 1:
The patent establishes the secondary offloading link in advance as a standby resource before primary link failure occurs. The UE and network maintain pre-configured offloading capabilities through RRC connection management, allowing immediate switchover to the secondary link when failure is detected, eliminating the need for time-consuming link reestablishment procedures.
Solution Approach 2:
The patent ensures continuous data transmission by maintaining both primary and secondary links simultaneously, with the secondary link ready to take over immediately upon primary link failure. The RRC connection is preserved across link transitions, allowing seamless data flow without interruption or delay, thus maintaining continuous useful action throughout the transmission process.
3Reliability
If RRC connection reestablishment procedure is initiated upon radio link failure, then connection reliability is improved, but data transfer time delay increases
Solution Approach 1:
The patent introduces a secondary offloading link as an intermediary transmission path that can immediately assume data transfer responsibilities when the primary link fails. This intermediary mechanism allows the system to maintain RRC connection reliability through the secondary link without triggering the time-consuming reestablishment procedure, as the connection state is already preserved and ready for use.
Data Source
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AI summary
Provided in embodiments of the present invention are a method and a device for transferring data. The method includes: transferring data to a base station via a first link, a second link offloading for the first link; if a radio link failure (RLF) occurs on the first link, transmitting an RLF indication message to the base station, where the RLF indication message is used to notify the base station that the RLF occurs on the first link; and transferring, over the second link, at least a portion of the data on the first link. According to embodiments of the present invention, when a link failure occurs between a user equipment and the base station during a mobile data offloading process, data transfer is performed via the offloading link, a time delay can be reduced and the data transfer efficiency is improved.