Master-Slave UWB Communication Channel Classification
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Solution Overview
Problem
In ultra-wideband radio communication systems, especially in the automotive sector, existing methods face challenges such as high energy consumption and packet collision rates due to regulatory restrictions on synchronization methods and the difficulty in achieving network topology knowledge, leading to inefficient communication between master and slave devices.
Innovation Solution
A master-slave system that initiates communication by transmitting request messages over specific channels of the ultra-wideband radio connection, with the master device classifying channel suitability based on response message quality and switching to alternative channels as needed to minimize collisions and energy use, using a combination of frequency and time slots, and pre-configuring channels via Bluetooth low-energy connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization by means of Superframe Beaconing is used, then coordinated communication is achieved, but regulatory restrictions prohibit transmission of such messages by motor vehicles in many countries
Solution Approach 1:
The patent extracts the essential coordination function from the prohibited Superframe Beaconing mechanism by implementing a simplified request-response protocol between master and slave devices. Instead of using beacon frames for synchronization, the system uses explicit request messages from the master device and corresponding response messages from slave devices, achieving coordination without violating regulatory restrictions on beacon transmission.
Solution Approach 2:
The patent introduces an intermediary request-response message exchange as a mediator between master and slave devices. This intermediary mechanism enables coordinated communication by having the master device send request messages and the slave devices respond with acknowledgment messages, thereby achieving synchronization and coordination without using prohibited beacon frames.
2Adaptability or versatility
If uncoordinated procedures such as CSMA and ALOHA are used, then regulatory compliance is maintained, but high energy consumption occurs due to large number of messages required at beginning of communication
Solution Approach 1:
The patent applies preliminary action by establishing a master-slave hierarchy and channel assignment protocol before actual data transmission begins. The master device pre-configures slave devices with specific channels and time slots, so that when communication starts, devices can immediately transmit on assigned resources without requiring extensive message exchanges for channel acquisition, thereby reducing initial energy consumption.
Solution Approach 2:
The patent implements dynamic channel selection and time-slot allocation where the master device can dynamically assign different channels and time slots to slave devices based on current communication needs. This dynamic resource allocation allows the system to adapt to varying traffic conditions and minimize the number of message exchanges required, thereby reducing energy consumption compared to static uncoordinated procedures.
3Adaptability or versatility
If uncoordinated procedures such as CSMA and ALOHA are used, then regulatory compliance is maintained, but very high packet collision rates occur with several subscribers
Solution Approach 1:
The patent segments the communication resources by dividing the available channels into distinct time slots and frequency bands, and assigning specific segments to individual slave devices. This segmentation eliminates packet collisions by ensuring that each slave device transmits on its assigned channel at its assigned time slot, preventing the collisions that occur in uncoordinated CSMA/ALOHA systems where multiple devices compete for the same medium.
Solution Approach 2:
The patent implements a feedback mechanism where slave devices send response messages to the master device to confirm successful reception of request messages and to report their transmission status. This feedback loop enables the master device to monitor the communication state and dynamically adjust channel assignments and time slots to avoid collisions, thereby maintaining regulatory compliance while significantly reducing packet collision rates.
4Reliability
If knowledge of entire network topology is required at each subscriber, then coordinated communication is achieved, but very high effort is involved due to amount of necessary communication
Solution Approach 1:
The patent extracts the network topology knowledge requirement from each individual subscriber device by implementing a centralized master device that maintains and manages the network topology information. Slave devices only need to know their own assigned channel and time slot, while the master device holds the complete network topology and uses this information to make intelligent channel assignments and coordinate communications, thereby reducing the complexity burden from individual devices.
Solution Approach 2:
The patent merges the network topology management function into a single master device rather than distributing this complex functionality across all subscriber devices. By combining topology knowledge and coordination responsibilities in the master device, the system achieves coordinated communication while minimizing the complexity and communication overhead required at individual slave devices, as they only need to follow instructions from the master.
Data Source
AI summary
A master-slave system for communication over an ultra-wideband radio connection is proposed. The master-slave system comprises at least one slave device and one master device, wherein the slave device and the master device are configured to communicate over the ultra-wideband radio connection. The master device is configured to generate and transmit a request message to the slave device over a first channel of the ultra-wideband radio connection. The slave device is configured to receive the request message over the first channel of the ultra-wideband radio connection, generate at least one response message based on the request message, and transmit the at least one response message to the master device over the first channel of the ultra-wideband radio connection, and the master device is configured to receive the at least one response message. Further, the master device is configured to classify the first channel of the ultra-wideband radio connection as suitable or unsuitable for data transmission based on the at least one received response message and to transmit further messages on the first channel of the ultra-wideband radio connection or to change to another channel of the ultra-wideband radio connection based on the classification.