HS-DSCH Redundancy Parameter Selection for Data Transmission Efficiency
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Solution Overview
Problem
The existing High Speed Downlink Packet Access (HSDPA) mechanisms in mobile communications networks face inefficiencies in selecting optimal redundancy parameter values for data transmission in HS-DSCH transport channels, particularly in the incremental redundancy mode, which affects the reliability and efficiency of data transmission.
Innovation Solution
A device and method for managing digital data blocks in HS-DSCH downlink transport channels that dynamically selects successive values of the redundancy parameter XRV, prioritizing systematic bits in the first transmission and alternating between parity 1 or 2 bits and systematic bits in subsequent transmissions, optimized for both QPSK and 16 QAM modulations, to improve data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If incremental redundancy mode is used with dynamic XRV selection, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic selection of XRV values based on transmission conditions and block type, transitioning from static to adaptive parameter selection. The processing means adjusts redundancy parameters in real-time according to channel quality and transmission requirements, improving efficiency while managing complexity through structured decision logic.
Solution Approach 2:
The patent changes the redundancy parameter XRV dynamically during transmission based on systematic/parity bit requirements. By varying this parameter according to the specific transmission needs (systematic bits first, then alternating with parity bits), the system optimizes transmission efficiency without requiring complete system redesign.
2Reliability
If priority is given to transmitting systematic bits in first block, then reliability of data reception is improved, but transmission time increases
Solution Approach 1:
The patent prioritizes transmitting systematic bits in the first block before parity bits. This preliminary action ensures that the most critical data components are delivered first, improving reception reliability while minimizing overall transmission time through optimized sequencing.
Solution Approach 2:
The patent implements periodic alternation between transmitting systematic bits and parity bits across multiple blocks. This structured periodic pattern ensures both data integrity and efficient use of transmission resources, balancing reliability and time requirements.
Data Source
AI summary
A device (D) is dedicated to managing transmission of digital data blocks in High-Speed Downlink Shared Channel (HS-DSCH) downlink transport channel set up between a base station of a communications network and a user equipment. It comprises processing means (MT) adapted, each time that a given block must be transmitted to the user equipment via the transport channel, to select successive values of the redundancy parameter XRV in accordance with a selected sequence in which the value of the redundancy parameter XRV used for the first block transmission is selected to give priority to transmitting systematic bits.