Bluetooth Transmitter Multi-Channel Broadcast Replication
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Solution Overview
Problem
Bluetooth broadcast operations are often disrupted by environmental interference, leading to a low success rate of packet transmission, as existing technologies rely on single-channel transmission which can be affected by interference.
Innovation Solution
A Bluetooth transmitter that generates multiple replicas of broadcast packets and transmits them concurrently through multiple selected broadcast channels, enhancing the chances of successful reception by the scanner even if some channels are disturbed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-channel transmission is used, then device complexity is reduced, but reliability of broadcast operation deteriorates due to environmental interference
Solution Approach 1:
The broadcast packet transmission is segmented into multiple replicas transmitted through different broadcast channels. Each replica carries the same broadcast packet information, allowing the receiver to successfully receive the broadcast packet if at least one replica is transmitted without interference. This segmentation approach divides the single transmission task into multiple parallel transmission paths, improving reliability without requiring complex error correction protocols.
Solution Approach 2:
The system changes the parameter of transmission channel by selecting multiple different broadcast channels for transmitting replicas of the same packet. Instead of using a single fixed channel, the transmitter dynamically selects from available broadcast channels, changing the transmission parameter to avoid interference and improve successful delivery probability.
2Reliability
If multiple replicas are transmitted through multiple channels, then reliability of broadcast operation is improved, but device complexity increases due to additional up-conversion modules and signal processing paths
Solution Approach 1:
The system merges multiple up-conversion operations into a unified transmission framework. Multiple replicas are generated and transmitted through different broadcast channels using shared radio frequency resources. The merging of transmission paths allows the system to achieve diversity gain while maintaining efficient resource utilization, balancing reliability improvement with acceptable device complexity.
Solution Approach 2:
The system dynamically selects broadcast channels for transmitting replicas based on current channel conditions and availability. Instead of using fixed channel assignments, the transmitter adaptively chooses from available broadcast channels, making the transmission system dynamic and responsive to environmental conditions, thereby improving reliability without requiring dedicated hardware for each channel.
3Reliability
If multiple broadcast channels are used for transmission, then robustness against interference is improved, but loss of time increases due to coordination of multiple transmission paths
Solution Approach 1:
The system performs preliminary actions by pre-selecting multiple broadcast channels and preparing replica packets before actual transmission. The transmitter proactively identifies available broadcast channels and prepares multiple replicas in advance, so that when transmission is needed, the replicas can be quickly dispatched without time-consuming channel selection or packet preparation during the transmission moment.
Solution Approach 2:
The system maintains continuous transmission of broadcast packet replicas across multiple channels simultaneously. Instead of sequentially transmitting replicas on different channels, the system enables parallel continuous transmission, ensuring that useful transmission action occurs continuously across all selected channels, maximizing the probability of successful delivery while minimizing time loss.
Data Source
AI summary
A Bluetooth transmitter, a Bluetooth device, and a transmitter are provided. After being received by the transmitter, a transmission bitstream is modulated to generate a first-path modulated signal and a second-path modulated signal, which are up-converted to a first first-path up-converted signal, a second first-path up-converted signal, a first second-path up-converted signal, and a second second-path up-converted signal. The first first-path and the second first-path up-converted signals are corresponding to a first broadcast channel, and the first second-path and the second second-path up-converted signals correspond to a second broadcast channel. A first-path baseband signal is generated based on the first first-path and the second first-path up-converted signals, and a second-path baseband signal is generated based on the first second-path and the second second-path up-converted signals. A broadcast signal is generated based on the first-path and the second-path baseband signals.