Telecommunication Feedback Spreading Rule for Uplink Sub-Frame Distribution
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Solution Overview
Problem
In TDD wireless transmission systems, the existing feedback reporting mechanisms result in a high number of feedback reports being transmitted in a single sub-frame, leading to increased channel complexity, power consumption, and network interference, particularly in asymmetric connections where the number of downlink sub-frames exceeds uplink sub-frames.
Innovation Solution
A method is introduced to reduce the number of feedback reports by spreading them evenly over available sub-frames using a predetermined spreading rule, allowing for the transmission of compressed or concatenated feedback reports that refer to multiple received data blocks, thereby minimizing the number of reports sent in a single sub-frame and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If feedback reports are transmitted for each received data block in every sub-frame, then complete feedback information is provided to the transmitting party, but the number of feedback reports increases significantly leading to increased channel complexity, power consumption, and network interference
Solution Approach 1:
The patent combines multiple feedback reports into a single transmitted feedback message. The receiving party aggregates ACK/NACK information for multiple data blocks and transmits them together in one feedback report, reducing the total number of feedback transmissions while preserving complete feedback information for all received data blocks.
Solution Approach 2:
The feedback mechanism is designed to handle multiple data blocks within a single feedback transmission framework. The universal feedback report structure can accommodate variable numbers of data blocks and their corresponding ACK/NACK states, making the system adaptable to different traffic patterns without requiring separate dedicated feedback channels for each data block.
2Loss of information
If feedback reports are transmitted for each received data block in every sub-frame, then complete feedback information is provided to the transmitting party, but power consumption increases due to frequent transmissions
Solution Approach 1:
The patent combines multiple feedback reports into a single transmitted feedback message. The receiving party aggregates ACK/NACK information for multiple data blocks and transmits them together in one feedback report, reducing the total number of feedback transmissions while preserving complete feedback information for all received data blocks.
Solution Approach 2:
The feedback transmission follows a periodic pattern where multiple data block acknowledgments are accumulated and transmitted together at regular intervals or when a threshold is reached, rather than transmitting immediately after each data block reception. This periodic aggregation reduces the frequency of transmissions and associated power consumption.
3Loss of information
If feedback reports are transmitted for each received data block in every sub-frame, then complete feedback information is provided to the transmitting party, but network interference increases due to high transmission frequency
Solution Approach 1:
The patent combines multiple feedback reports into a single transmitted feedback message. The receiving party aggregates ACK/NACK information for multiple data blocks and transmits them together in one feedback report, reducing the total number of feedback transmissions while preserving complete feedback information for all received data blocks.
Solution Approach 2:
The feedback transmission follows a periodic pattern where multiple data block acknowledgments are accumulated and transmitted together at regular intervals or when a threshold is reached, rather than transmitting immediately after each data block reception. This periodic aggregation reduces the frequency of transmissions and associated power consumption.
4Productivity
If the number of downlink sub-frames exceeds uplink sub-frames in asymmetric connections, then downlink transmission capacity is increased, but the number of feedback reports that must be transmitted in limited uplink sub-frames increases
Solution Approach 1:
The patent combines multiple feedback reports into a single transmitted feedback message. The receiving party aggregates ACK/NACK information for multiple data blocks and transmits them together in one feedback report, reducing the total number of feedback transmissions while preserving complete feedback information for all received data blocks.
Solution Approach 2:
The feedback mechanism is designed to handle multiple data blocks within a single feedback transmission framework. The universal feedback report structure can accommodate variable numbers of data blocks and their corresponding ACK/NACK states, making the system adaptable to different traffic patterns without requiring separate dedicated feedback channels for each data block.
Data Source
Figure 1a~3
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Figure 6
AI summary
A base station transmits data blocks in downlink sub-frames to a terminal and receives feedback reports for the data blocks in uplink sub-frames from the terminal. The feedback reports indicate whether errors have occurred in the data blocks and are scheduled in the uplink sub-frames according to a predetermined spreading rule known by the base station and the terminal. The spreading rule dictates that the feedback reports are distributed evenly over the uplink sub-frames. Based on the predetermined spreading rule, the base station derives which of the downlink sub-frames each feedback report refers to.