Multi-Protocol Baseband Processor Time-Division Multiplexing
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Solution Overview
Problem
Current automotive networks, such as those following the IEEE 802.11p standard, face challenges in integrating additional communication services like Bluetooth, WLAN, or ZigBee due to the need for separate baseband processors and RF transceivers for each protocol, leading to increased current consumption and hardware complexity.
Innovation Solution
A multi-protocol transceiver architecture that includes a timing controller for identifying 802.11p intervals and guard intervals, along with multiple RF front ends and a baseband processor capable of operating as 802.11p during designated intervals and switching to other protocols like Bluetooth or ZigBee during gap intervals, allowing for simultaneous data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate baseband processors and RF transceivers are used for each wireless protocol (802.11p, Bluetooth, WLAN, ZigBee), then each protocol can operate independently with its own frequency and modulation type, but the hardware complexity and current consumption are greatly increased
Solution Approach 1:
The patent merges multiple protocol processing capabilities into a single shared baseband processor. The baseband processor is configured to handle 802.11p, Bluetooth, WLAN, and ZigBee protocols by loading appropriate protocol-specific code or configuration, eliminating the need for separate dedicated processors for each protocol while maintaining full protocol compatibility
Solution Approach 2:
The baseband processor is designed as a universal multi-functional unit that can operate with different wireless protocols. Through configurable parameters and protocol-specific processing modes, a single baseband processor performs the functions previously requiring multiple dedicated processors, reducing hardware complexity while preserving adaptability across protocols
2Adaptability or versatility
If separate baseband processors and RF transceivers are used for each wireless protocol, then each protocol has dedicated processing capability, but the current consumption of the transceiver is greatly increased
Solution Approach 1:
Multiple protocol processing functions are combined into a single baseband processor, eliminating redundant hardware components and their associated power consumption. The shared processor architecture reduces overall current consumption compared to having separate dedicated processors for each protocol
Solution Approach 2:
The system employs time-division multiplexing where the single baseband processor alternates between handling different protocols in periodic time slots. During 802.11p communication intervals, the processor handles WAVE protocols; during guard intervals, it processes other protocols like Bluetooth or WLAN. This periodic switching allows full protocol support while keeping the processor active only when needed, reducing overall power consumption
3Device complexity
If a single baseband processor is shared across multiple protocols through time multiplexing, then hardware complexity and current consumption are reduced, but the processor must precisely switch between protocols during specific time intervals
Solution Approach 1:
A timing controller with feedback mechanisms monitors the communication intervals and guard intervals, dynamically adjusting the baseband processor's protocol switching timing. The timing controller receives feedback about ongoing communications and coordinates protocol transitions to ensure seamless switching without data loss, managing the complexity of precise timing coordination
Data Source
AI summary
A multi-protocol transceiver provides a plurality of RF front ends, each responsive to a particular protocol and frequency, a common set of analog/digital converters, a baseband processor which receives and demodulates and also modulates and transmits baseband wireless packets for mixing to a carrier frequency by each RF front end. A timing controller allocates intervals of time for a first protocol such as WAVE protocol, and also allocates exclusive intervals of time for a second protocol such as Bluetooth.