UE Split-Bearer Buffer Feedback for Packet Delivery Reliability
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Solution Overview
Problem
The existing wireless communication networks face challenges in efficiently handling data transmissions over split bearers due to slow and unreliable flow-control feedback from different transmission paths, leading to increased delays and packet losses in the reordering buffer of user equipment (UE).
Innovation Solution
Implementing a mechanism where user equipment (UE) buffers packets from multiple radio network nodes on a split bearer and transmits status indications of the reordering buffer to the network nodes, allowing them to adjust transmission strategies based on the buffer status, thereby enhancing flow control and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE buffers packets from multiple radio network nodes on a split bearer, then the reordering buffer can handle packet reordering and reduce packet losses, but the flow-control feedback becomes slower and less reliable
Solution Approach 1:
The patent implements a feedback mechanism where the UE sends status indications to the network node about the reordering buffer state. This feedback loop allows the network to adjust transmission strategies based on actual buffer conditions, resolving the contradiction by making the feedback more reliable and timely despite the complexity of multi-path buffering operations
2Productivity
If the network uses split bearers with multiple transmission paths, then data transmission throughput increases, but flow control becomes more complex and delays increase
Solution Approach 1:
The patent segments the flow control mechanism by introducing separate status indications for different transmission paths. Each path can be managed independently with its own buffer status reporting, which simplifies the overall flow control complexity while maintaining high throughput through the split bearer architecture
Solution Approach 2:
By implementing targeted feedback mechanisms where the UE reports buffer status for specific transmission paths, the network can make informed decisions about resource allocation and flow control without being overwhelmed by the complexity of multi-path management, thus maintaining high productivity
3Reliability
If the UE transmits status indications of the reordering buffer to the network node, then the network can adjust transmission strategies more effectively, but the overhead for status reporting increases
Solution Approach 1:
The patent applies partial action by transmitting only the necessary status indications about the reordering buffer rather than all possible buffer state information. This selective reporting approach maintains effective transmission strategy adjustment while minimizing the overhead associated with comprehensive status reporting
Data Source
AI summary
Embodiments herein disclose, for example, a method performed by a UE for handling data transmitted over a split bearer between a first radio network node and the UE, and between a second radio network node and the UE in a wireless communication network. The UE buffers one or more packets from the first radio network node and the second radio network node received over the split bearer in a reordering buffer; and transmits one or more indications to one of the radio network nodes, wherein the one or more indications indicate a status of the reordering buffer.