EPS Bearer Splitting for Cellular Wi-Fi Traffic Management
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Solution Overview
Problem
Radio access networks face challenges in maintaining quality of service due to increasing demand for voice and video communications, leading to communication latency and network congestion, especially when peak capacity is reached, and existing solutions do not effectively utilize unlicensed communication spectra to alleviate these issues.
Innovation Solution
Implementing a protocol that allows wireless cellular devices to seamlessly switch between cellular and Wi-Fi communication channels during a session, using carrier aggregation and EPS bearer splitting, with a Dual Link Data Convergence (DLDC) layer to reorder packets and manage communication across both channels, ensuring compatibility with both RAN-based and core-based network architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radio access networks increase capacity to meet growing voice and video demand, then network throughput improves, but quality of service deteriorates due to peak capacity limitations and latency
Solution Approach 1:
The patent segments the EPS bearer into multiple sub-bearers that can be distributed across different transport networks (cellular and Wi-Fi). This segmentation allows traffic to be divided and transmitted through multiple parallel paths, increasing overall throughput while maintaining quality of service through coordinated packet reordering at the receiving end.
2Reliability
If radio access networks utilize only licensed cellular spectra, then communication reliability is maintained, but available bandwidth is limited due to spectrum scarcity
Solution Approach 1:
The patent implements multi-functionality by enabling the cellular network infrastructure to handle both traditional cellular traffic and Wi-Fi traffic through a unified EPS bearer framework. The system can dynamically route traffic through cellular networks, Wi-Fi networks, or both simultaneously, making the communication infrastructure universal and adaptable to different network conditions while expanding available bandwidth.
3Quantity of substance
If packets are transmitted over multiple transport networks simultaneously, then communication bandwidth increases, but packet delivery order may be disrupted
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a packet reordering buffer at the receiving end of the EPS bearer. This intermediary component receives packets from multiple sub-bearers, reorders them based on their sequence numbers, and delivers them in the correct order to higher protocol layers, thereby resolving the timing disruption caused by parallel transmission over multiple networks.
4Adaptability or versatility
If seamless switching between cellular and Wi-Fi channels is implemented, then network adaptability improves, but protocol complexity increases due to carrier aggregation and bearer splitting requirements
Solution Approach 1:
The patent implements dynamics by making the EPS bearer configuration flexible and adaptive rather than static. The system can dynamically create, modify, and remove sub-bearers based on current network conditions, traffic requirements, and available resources. This dynamic approach allows seamless switching between cellular and Wi-Fi channels while managing protocol complexity through on-demand configuration rather than permanent complex structures.
Data Source
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AI summary
A communication device comprises physical layer circuitry configured to transmit and receive radio frequency electrical signals to communicate directly with one or more separate wireless devices via a cellular network and a non-cellular network; and processing circuitry configured to: initiate transmission of a packetized message using a non-cellular communication channel and a cellular communication channel, wherein the packetized message includes a plurality of internet protocol (IP) packets; indicate in an IP header field of an IP packet of the plurality of IP packets that the IP packet includes a packet sequence number; and include packet sequence numbers in the IP packets.