Link Aggregation Transmitter for Dynamic Bearer Splitting
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing bearer traffic across different radio access technologies (RATs) in heterogeneous networks, leading to suboptimal link utilization and increased latency due to inadequate real-time decision-making and coordination between WWAN and WLAN links.
Innovation Solution
Implementing a cross-layer bearer splitting and cross-RAT retransmission method that dynamically splits bearer traffic across WWAN and WLAN links based on real-time link quality and traffic conditions, using a link aggregation transmitter to determine the optimal traffic distribution and retransmission strategies with minimal coordination, and utilizing network-assisted algorithms to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bearer traffic is managed separately on WWAN and WLAN links without dynamic splitting, then each link operates independently, but link utilization is suboptimal and latency increases
Solution Approach 1:
The patent implements dynamic bearer splitting that continuously adjusts traffic distribution between WWAN and WLAN links based on real-time link quality metrics (RSRP, SINR, throughput) and traffic conditions. This dynamic adaptation allows the system to optimize link utilization and reduce latency by routing traffic through the most suitable link at any given moment, resolving the contradiction between independent operation and optimized performance
Solution Approach 2:
The system changes operational parameters (traffic splitting ratios, retransmission policies, buffer sizes) based on measured link conditions. By adjusting these parameters dynamically according to real-time feedback from both links, the system achieves optimal link utilization while minimizing latency, transforming static separate management into adaptive coordinated operation
2Productivity
If cross-layer bearer splitting with real-time coordination is implemented, then link utilization and QoS improve, but system complexity increases
Solution Approach 1:
The patent segments the bearer traffic management function into distinct components: a cross-layer coordination module that handles high-level splitting decisions, link-specific measurement modules that monitor RSRP/SINR/throughput, and independent transmission modules for each link. This segmentation allows complex coordinated management to be achieved while maintaining modularity and manageable complexity through clear separation of concerns
Solution Approach 2:
The patent introduces a cross-layer coordination intermediary that acts as a mediator between the WWAN and WLAN protocol stacks. This intermediary receives link quality metrics from both links, makes splitting decisions, and coordinates retransmission policies without requiring direct complex interaction between the two independent protocol stacks, thereby improving utilization while controlling system complexity through standardized mediation
3Device complexity
If minimal coordination between WWAN and WLAN links is used, then system complexity is reduced, but retransmission efficiency and QoS deteriorate
Solution Approach 1:
The patent implements self-service retransmission mechanisms where each link independently handles its own retransmissions based on locally available information and pre-coordinated policies. The cross-layer coordinator establishes retransmission rules in advance, and each link autonomously executes them without requiring continuous real-time coordination, reducing coordination overhead while maintaining retransmission efficiency through localized decision-making
Data Source
AI summary
Systems and methods provide cross-layer bearer splitting and cross-RAT retransmission in a RAN-based WLAN/WWAN integrated network. A link aggregation transmitter is configured to receive, from a WLAN stack lower layer protocol, a WLAN transmission confirmation signal and a WLAN congestion status, and to receive, from a WWAN stack lower layer protocol, a WWAN transmission confirmation signal and a WWAN congestion status. The link aggregation transmitter dynamically splits the bearer traffic across the WWAN link and the WLAN link based at least in part on the WLAN transmission confirmation signal, the WLAN congestion status, and the WWAN congestion status.