Uplink Frame Protocol Selective Data Inclusion for UMTS
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Solution Overview
Problem
Current uplink transmission in UMTS systems, particularly in enhanced dedicated channels, face challenges in efficiently managing data transmission with error control and supporting soft handover, with existing frame transmission intervals being too long and lacking efficient mechanisms for selectively including and indicating valid data blocks.
Innovation Solution
A method and network element for selectively including data in frames based on error control, using a bit map to indicate included and excluded data blocks, and supporting soft handover by comparing and combining common transport blocks, with signaling to indicate the presence of selectively included data, and a frame protocol that includes a payload with variable length based on error control outcomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all available data blocks are transmitted in every frame, then data transmission completeness is improved, but bandwidth usage increases and efficiency decreases
Solution Approach 1:
The patent extracts only the necessary data blocks that pass error control checks and includes them in the frame payload, while excluding blocks that fail error control. This selective extraction approach transmits only valid data, improving bandwidth efficiency while maintaining transmission completeness for valid blocks.
Solution Approach 2:
Instead of transmitting all available data blocks (excessive action), the patent transmits only the subset of blocks that pass error control validation (partial action). This partial transmission approach avoids wasting bandwidth on invalid blocks while ensuring all valid blocks are transmitted.
2Device complexity
If a fixed frame transmission interval is used, then system simplicity is maintained, but transmission efficiency decreases when data volume varies
Solution Approach 1:
The patent introduces dynamic elements into the frame structure through the bitmap indication mechanism. While the frame interval remains fixed, the payload content and its indication via bitmap dynamically adapt to the actual data availability and error control outcomes, allowing efficient transmission regardless of data volume variations.
Solution Approach 2:
The frame structure is designed to be universal by incorporating a bitmap indication field that can represent various data inclusion scenarios. This multi-functional bitmap mechanism handles different data volumes and error control outcomes within a single unified frame format, maintaining simplicity while improving efficiency.
3Reliability
If error control is applied to all data blocks, then data reliability is improved, but processing time and complexity increase
Solution Approach 1:
The patent segments the data transmission process by applying error control independently to each data block and using a bitmap to indicate which blocks pass validation. This segmentation allows parallel processing of error control checks and enables selective transmission of only valid blocks, reducing overall processing time while maintaining reliability.
4Loss of energy
If selective data inclusion with bitmap indication is implemented, then bandwidth efficiency is improved, but frame protocol complexity increases
Solution Approach 1:
The bitmap serves as an intermediary element between the error control validation process and the frame transmission. It concisely encodes the inclusion/exclusion status of multiple data blocks using minimal bits, achieving bandwidth efficiency while adding only modest complexity to the frame protocol through a well-defined indication mechanism.
Data Source
AI summary
A method of transporting data in a dedicated channel of a mobile communication system includes selectively including data in the payload of a frame, and further including in the frame an indication of at least one of the selectively included data and excluded data. The dedicated channel is an enhanced dedicated channel and the data includes data sets or transport blocks.