Dual Connectivity PDCP Segmentation for Latency Reduction
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Solution Overview
Problem
Current LTE systems face significant latency issues and costly maintenance, and dual connectivity in wireless networks struggles with packet data convergence flow control and user equipment capability determination in multi-carrier environments, leading to inefficiencies in data transmission.
Innovation Solution
A method for dual connectivity in wireless communication systems that involves transmitting packet data convergence protocol windows between base stations and determining processing times for data packet transmission, allowing for dynamic allocation of resources and partitioning of processing capabilities between master and secondary base stations to optimize data flow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dual connectivity is implemented in wireless networks, then data transmission capacity is improved, but packet data convergence flow control becomes complex
Solution Approach 1:
The patent segments the packet data convergence protocol (PDCP) functionality into separate entities at the master base station and secondary base station. The PDCP data unit is divided into a first portion transmitted directly to user equipment and a second portion transmitted to the secondary base station for forwarding. This segmentation resolves the flow control complexity by distributing PDCP responsibilities across multiple base stations while maintaining improved data transmission capacity through dual connectivity paths.
2Productivity
If dual connectivity is implemented in wireless networks, then data transmission capacity is improved, but user equipment capability determination becomes complex
Solution Approach 1:
The patent performs preliminary determination of user equipment capabilities with respect to dual connectivity before establishing data transmission paths. The master base station determines whether the user equipment supports dual connectivity and what specific capabilities it has. This preliminary action simplifies subsequent flow control and data transmission by pre-configuring the system based on known equipment capabilities, resolving the complexity of real-time capability determination.
3Ease of manufacture
If LTE systems use existing infrastructure, then deployment cost is reduced, but latency remains significant
Solution Approach 1:
The patent segments data transmission paths into multiple routes: a direct path from master base station to user equipment and an indirect path through the secondary base station. This segmentation enables parallel data flow through different paths, reducing overall latency while utilizing existing LTE infrastructure. The master base station can transmit certain data directly while other data flows through the secondary base station, achieving lower latency without requiring complete infrastructure replacement.
Data Source
AI summary
A system, a method, an apparatus, and a computer program product for transmission of data packets using dual connectivity in wireless communications system. A packet data convergence protocol (PDCP) window is transmitted from a first base station to a second base station. A first time for a successful transmission of a data packet from the first base station to a user equipment is determined. An acknowledgement of a successful transmission of the data packet from the second base station to the user equipment is received. The second base station determines a second time for the successful transmission of the data packet from the second base station to the user equipment based on the received PDCP window. Based on a comparison of the first and second times, a base station to process at least another data packet is determined.