Transmitter Latency Reduction via Segmented Data Sampling
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Solution Overview
Problem
Multiple unicast transmissions in communication networks, such as Bluetooth, suffer from increased worst-case latency as the number of receiver devices increases, leading to inefficient data transmission and potential delays in audio or video streaming.
Innovation Solution
A transmitter configuration that samples and encodes data stream portions with time offsets between successive portions, allowing partial overlap of sampling and encoding/decoding operations, ensures that each receiver device receives data with reduced latency by synchronizing transmission times across multiple receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast transmission is used to send data to multiple receiver devices individually, then each receiver can acknowledge receipt reliably, but the transmission becomes bandwidth intensive and latency increases with the number of receivers
Solution Approach 1:
The data stream is segmented into multiple portions that can be processed in parallel. The transmitter samples different portions of the data stream simultaneously for different receivers, dividing the sequential processing into concurrent operations that reduce overall latency while maintaining individual acknowledgements.
Solution Approach 2:
The transmitter performs sampling and encoding operations in advance before actual transmission to multiple receivers. By preparing data portions beforehand and overlapping sampling with encoding/decoding operations, the system reduces the critical path latency while ensuring data is ready for immediate transmission upon acknowledgement.
2Reliability
If multiple unicast transmissions are performed sequentially to multiple receiver devices, then each transmission can be completed reliably, but the worst-case latency increases with the number of receivers
Solution Approach 1:
The system maintains continuous useful action by overlapping sampling, encoding, and transmission operations across multiple receivers. Instead of completing one transmission entirely before starting the next, the transmitter continuously samples new data portions while encoding and transmitting previous portions to different receivers, maximizing resource utilization and reducing total transmission time.
Solution Approach 2:
The transmission system dynamically adjusts the timing and scheduling of sampling and encoding operations for different data portions. By introducing time offsets between successive portions and dynamically managing the overlap of operations, the system adapts to varying receiver requirements and minimizes worst-case latency while maintaining reliable transmission completion.
3Manufacturing precision
If data is sampled and encoded for each receiver sequentially, then processing can be completed accurately, but the transmission time and latency increase
Solution Approach 1:
The data processing is segmented into independent portions that can be sampled and encoded in parallel for different receivers. Each portion is processed independently with appropriate time offsets, allowing concurrent execution of sampling and encoding operations without compromising the accuracy of individual data portions.
Solution Approach 2:
Sampling operations are performed in advance and overlapped with subsequent encoding operations. By preparing data portions through sampling before encoding begins, and overlapping these operations where possible, the system reduces total processing time while maintaining the accuracy required for reliable transmission.
Data Source
AI summary
A transmitter for transferring a data stream to multiple receivers, the transmitter being configured to sample a first portion of the data stream to form a first sample dataset, encode the first sample set to form a first encoded dataset and transmit the first encoded dataset to a first one of the receivers; sample a second portion of the data stream to form a second sample dataset, encode the second sample set to form a second encoded dataset and transmit the second encoded dataset to a second one of the receivers; and to perform at least part of the step of sampling the second portion of the datastream while the first sample dataset is being encoded or the first encoded dataset is being transmitted.