Core Network Traffic Splitting and Reordering for 5G Dual Connectivity
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Solution Overview
Problem
Current 5G communication systems face challenges in managing traffic distribution and reordering across multiple paths, leading to potential congestion and performance degradation due to excessive out-of-delivery issues, especially when dual connectivity is disrupted by transmission failures at base stations.
Innovation Solution
The implementation of a Traffic Splitting and Reordering Layer (TSRL) at both the core network and user equipment (UE) sides, which allows for the splitting and reordering of traffic based on assistance information such as transmission delay, queue size, and transmission size, enabling adaptive traffic distribution across multiple paths to prevent congestion and ensure sequential packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traffic is transmitted through multiple paths in dual connectivity mode, then data transmission rate is improved, but transmission reliability deteriorates when a base station experiences failure
Solution Approach 1:
The patent segments traffic into multiple flows that can be transmitted through different base stations. The traffic splitting and reordering layer divides the original traffic flow into multiple sub-flows, each transmitted through a different path, thereby maintaining high data transmission rates while ensuring that failure of one path does not completely disrupt communication.
Solution Approach 2:
The patent dynamically changes traffic distribution parameters based on base station status. When a base station fails, the system adjusts the traffic split ratio parameters to redirect traffic through remaining functional base stations, maintaining transmission reliability while adapting to changed conditions.
2Adaptability or versatility
If traffic splitting is implemented at core network level, then traffic distribution flexibility is improved, but network complexity increases
Solution Approach 1:
The patent introduces a traffic splitting and reordering layer as an intermediary component in the core network. This layer acts as a mediator that simplifies traffic distribution by providing a standardized interface between the core network and multiple base stations, thereby improving traffic flexibility without proportionally increasing overall network complexity.
3Manufacturing precision
If assistance information is collected from base stations for traffic splitting, then traffic splitting accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential assistance information parameters needed for traffic splitting decisions from base station data. By selecting and extracting only the most critical parameters (such as load status, channel quality, and queue depth), the system achieves accurate traffic splitting while minimizing signaling overhead by excluding redundant information.
Data Source
AI summary
The present disclosure provides methods and apparatus relating to a 5G or pre-5G communication system for supporting a higher data rate than that of a 4G communication system, such as long term evolution (LTE). A method for processing traffic at a core network entity processes traffic includes transmitting a message for requesting assistance information to at least one base station, receiving the assistance information from the at least one base station, splitting the traffic based on the received assistance information, and transmitting the split traffic through a core network. A core network entity includes a transceiver and a processor configured to control the transceiver to transmit a message for requesting assistance information to at least one base station, receive the assistance information from the at least one base station, split traffic based on the received assistance information, and transmit data through the split traffic.