UE PDCP Transmission Control for MPD Diversity Gain
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Solution Overview
Problem
In 5G wireless communication networks, especially those operating in MilliMeter-Wave bands, Multiple Point Diversity (MPD) systems face challenges with link quality fluctuations due to terminal rotation, obstacles, and mobility, leading to inefficient uplink transmission as UE does not achieve diversity gain when one link is better than the other for extended periods.
Innovation Solution
A method in User Equipment (UE) that compares the number of successfully transmitted Packet Data Convergence Protocol (PDCP) Packet Data Units (PDUs) over two connections and refrains from transmitting additional PDUs if one connection has a predetermined threshold more successful transmissions than the other, avoiding unnecessary retransmissions and optimizing data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted simultaneously via multiple connections in MPD system, then diversity gain is achieved for robustness, but unnecessary retransmissions occur when one link is significantly better than the other
Solution Approach 1:
The patent dynamically adjusts the transmission strategy by continuously comparing the number of successfully transmitted PDCP PDUs between different connections. When one connection shows a threshold advantage over another, the system adaptively refrains from transmitting additional PDUs through the inferior connection, thereby optimizing resource allocation while maintaining diversity gain.
Solution Approach 2:
The invention implements a feedback mechanism where the UE monitors and compares transmission success counts across multiple connections. Based on this feedback information, the system makes intelligent decisions about whether to continue transmitting data through all connections or to pause transmissions on weaker links, thus eliminating unnecessary retransmissions while preserving reliability.
2Productivity
If continuous transmission is maintained on all connections, then throughput is maximized, but system resources are wasted on redundant transmissions
Solution Approach 1:
The patent applies partial action by selectively suspending transmissions on certain connections rather than maintaining full transmission on all links. When one connection achieves a threshold advantage in successful PDU transmissions, the system partially stops transmissions on other connections, avoiding excessive resource consumption while maintaining adequate throughput through the superior link.
Solution Approach 2:
The invention effectively discards redundant transmission attempts on inferior connections when a threshold advantage is detected, preventing waste of system resources. The UE monitors transmission outcomes and strategically pauses transmissions on weaker links, thereby recovering system resources that would otherwise be consumed by unnecessary retransmissions.
Data Source
AI summary
The present disclosure relates to a method used in a User Equipment (UE) for transmitting data to a network side via at least a first and a second connection, and the associated UE. The method comprises: comparing a first number, M, of Packet Data Convergence Protocol (PDCP) Packet Data Units (PDUs) that have been successfully transmitted via the first connection with a second number, N, of PDCP PDUs that have been successfully transmitted via the second connection; and if M is larger than N by a predetermined threshold number, S, of PDCP PDUs, refraining from transmitting S PDCP PDUs to be transmitted following the N PDCP PDUs in the data via the second connection.