Multi-Connectivity Buffer Routing Under Memory Occupancy Limits
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Solution Overview
Problem
In multi-connectivity scenarios, wireless communication devices face challenges in efficiently managing buffer memory usage, leading to potential overflow and reduced throughput performance due to varying throughput rates and ARQ timelines across different radio access technologies, especially in split radio bearer configurations.
Innovation Solution
Implementing mechanisms to control and prioritize data routing and transmission across multiple communication links based on buffer memory thresholds, including unsolicited retransmissions, power adjustments, and data duplication to optimize memory usage and maintain optimal throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE establishes multiple radio bearers for multi-connectivity communications, then communication reliability and data transmission capability are improved, but buffer management complexity and resource allocation difficulty increase
Solution Approach 1:
The patent segments the buffer management by creating separate logical structures for different radio bearers (SRB and DRB), with dedicated buffer status tracking for each bearer type. This segmentation allows independent management of control plane and user plane data buffers, reducing overall management complexity while maintaining multi-connectivity reliability
Solution Approach 2:
The patent introduces an intermediary buffer status report mechanism that mediates between multiple radio bearers and the network. This intermediary structure consolidates buffer status information from multiple bearers into unified reports, simplifying the complexity of managing multiple separate buffer systems while maintaining communication reliability
2Productivity
If data is transmitted over multiple radio bearers simultaneously, then data transmission speed and reliability are improved, but buffer resource allocation and management difficulty increase
Solution Approach 1:
The patent applies local quality by assigning different buffer management characteristics to different radio bearers. SRBs have dedicated buffer status tracking for control plane data, while DRBs have separate tracking for user plane data. This localized differentiation enables optimized resource allocation for each bearer type, improving overall data transmission speed while managing allocation difficulty through structured local control
Solution Approach 2:
The patent implements dynamic buffer resource allocation where the network can dynamically adjust buffer status reporting configurations for different bearers based on traffic conditions. This dynamic approach allows the system to adapt buffer management to current transmission needs, optimizing data transmission speed while reducing allocation difficulty through flexible, condition-based resource distribution
3Measurement precision
If buffer status reports are sent for each radio bearer, then network resource allocation accuracy is improved, but signaling overhead and processing burden increase
Solution Approach 1:
The patent merges buffer status reporting by allowing the network to configure combined reporting mechanisms where buffer status information from multiple radio bearers can be aggregated into single reporting instances. This merging maintains measurement precision through comprehensive buffer status coverage while reducing signaling overhead by eliminating redundant separate reports for each bearer
Solution Approach 2:
The patent implements universal buffer status reporting structures that can serve multiple radio bearers simultaneously. The buffer status report mechanism is designed with multi-functionality to handle both SRB and DRB buffer status in a unified framework, providing accurate buffer status measurement across all bearers while reducing the total quantity of signaling messages through shared reporting infrastructure
Data Source
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AI summary
Wireless communications systems and methods related to buffer/memory management for multi-connectivity in a wireless communication network are provided. A wireless communication device transmits a first portion of a plurality of data packets using a first radio access technology (RAT). The wireless communication device transmits a second portion of the plurality of data packets using a second RAT different from the first RAT. The wireless communication device stores at least some of the plurality of data packets in a memory pending an acknowledgement (ACK) indication associated with at least a first data packet of the plurality of data packets. The wireless communication device determines a transmission configuration for at least the first data packet and a second data packet based on whether a threshold occupancy of the memory is satisfied. Other aspects and features are also claimed and described.