Variable Data Rate Wireless Transmitter Prioritization
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Solution Overview
Problem
Current point-to-point communication systems often waste capacity and increase costs by maintaining a constant high data rate to ensure errorless transmission of high-priority signals, even in optimal conditions, and existing adaptive coding and modulation techniques can cause packet loss and retransmissions during data rate adjustments.
Innovation Solution
A variable data rate system with a delay compensation buffer that maintains a fixed delay and prioritizes high-priority signals, allowing for dynamic data rate changes without dropping or delaying them, while optionally dropping lower priority signals to optimize capacity usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant high data rate is maintained to ensure errorless transmission of high-priority signals, then transmission reliability is improved, but transmission capacity is wasted and costs increase
Solution Approach 1:
The system dynamically adjusts the data rate based on channel conditions and signal priority. High-priority signals receive enhanced protection during adjustments, while low-priority signals have their data rate reduced when conditions deteriorate, eliminating the need to maintain constant high data rate for all signals
Solution Approach 2:
Different quality of service is provided to different signals based on their priority. High-priority signals maintain errorless transmission with framing synchronization protection, while low-priority signals accept variable data rates, allowing capacity optimization without compromising critical communications
2Productivity
If adaptive coding and modulation is used to reduce data rate in response to interference and fading, then transmission capacity is optimized, but data packets are lost and require retransmission
Solution Approach 1:
The system performs dynamic data rate adjustment through ACM while incorporating mechanisms to prevent packet loss during transitions. The adaptive process monitors channel conditions and adjusts rates smoothly, maintaining reliability for high-priority signals even during adaptation
Solution Approach 2:
The system prepares for data rate changes by implementing protection mechanisms before adjustments occur. Framing synchronization is maintained and protected during transitions, cushioning against potential packet loss and ensuring continuous reliable delivery
3Use of energy by moving object
If data rate is reduced during interference and fading, then energy consumption is decreased, but framing synchronization is lost and service is interrupted
Solution Approach 1:
The system dynamically adjusts data rate in response to channel conditions while simultaneously maintaining framing synchronization through protected adjustment mechanisms. Energy consumption is reduced during fading conditions without losing synchronization stability
Solution Approach 2:
The system uses an intermediary protection mechanism during data rate adjustments that preserves framing synchronization. This mediator ensures that even when data rate changes to conserve energy, the framing structure remains intact and service continues without interruption
Data Source
AI summary
A variable data rate wireless transmitter configured to receive input of data from a plurality of input channels and transmit at least some of the data over a variable data rate wireless point-to-point communication link, wherein portions of the data are associated with priorities, and the wireless transmitter is configured to change transmission of at least some of the portions of the data, based, at least partly, on the priorities associated with the portions of the data, and on a data rate configured for transmitting the portions of the data over the variable data rate wireless communication link. A variable data rate wireless receiver configured to receive data over a variable data rate wireless point-to-point communication link, including a delay compensation buffer configured to maintain a substantially fixed delay between input of the data into a wireless transmitter transmitting the data and output of the data from the delay compensation buffer, by maintaining a suitable output rate of the data from the delay compensation buffer. Related apparatus and methods are also described.