Dynamic Feedback Timing for Multi-RAT Wireless Devices
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Solution Overview
Problem
Wireless communication systems face challenges in transmitting feedback for transmissions received on one radio access technology (RAT) when the transmitter is tuned to a different RAT during the default feedback transmission time, leading to inefficiencies and potential interference between concurrent active connections on different RATs.
Innovation Solution
Implementing a method where wireless communication devices receive a first transmission according to a first RAT and determine if they are tuned to a second RAT during the default feedback transmission time, allowing them to transmit feedback at a delayed feedback transmission time based on the timing to switch from the second RAT to the first RAT, thereby avoiding conflicts and optimizing feedback transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmitter operates on a first RAT and transmits feedback at the default feedback transmission time, then feedback transmission is timely and efficient, but the transmitter cannot maintain concurrent active connections on a second RAT without causing interference or missing feedback opportunities
Solution Approach 1:
The feedback transmission time is made dynamic rather than fixed. The system determines whether to transmit feedback at the default feedback transmission time or at a delayed feedback transmission time based on the transmitter's RAT status. This dynamic adjustment allows the system to adapt to changing RAT conditions while maintaining feedback transmission capability across multiple RATs.
Solution Approach 2:
The system performs preliminary determination of the transmitter's RAT status before the default feedback transmission time. By checking whether the transmitter is tuned to the first or second RAT in advance, the system can proactively select the appropriate feedback transmission timing, preventing feedback loss or interference before they occur.
2Reliability
If the transmitter switches from second RAT to first RAT to transmit feedback, then feedback can be transmitted on the correct RAT, but the switching time causes delay in feedback transmission
Solution Approach 1:
The system determines the RAT status and calculates the appropriate feedback transmission time in advance. By knowing the switching timing beforehand, the system can schedule feedback transmission to occur after the RAT switch is complete, ensuring reliability while minimizing delay.
Solution Approach 2:
The feedback transmission time parameter is changed from a fixed default value to a variable value that depends on the RAT switching timing. This parameter adjustment allows the system to optimize the balance between transmission reliability (ensuring the transmitter is on the correct RAT) and time efficiency (minimizing the delay caused by switching).
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AI summary
Techniques are described for wireless communication. One method includes receiving a first transmission according to a first radio access technology (RAT); determining a transmitter of the wireless communication device is tuned to a second RAT during a default feedback transmission time for the first transmission; and transmitting feedback for the first transmission at a delayed feedback transmission time for the first transmission. The delayed feedback transmission time is based at least in part on a timing for tuning the transmitter from the second RAT to the first RAT. Another method includes transmitting a first transmission, in which the first transmission is associated with a default feedback transmission time for the first transmission; and receiving feedback for the first transmission at a delayed feedback transmission time for the first transmission.