AoA Packet Supplemental Field for Wireless Angle Determination
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Solution Overview
Problem
Current wireless communication systems, particularly those using Bluetooth, lack the capability to efficiently determine the angle of arrival (AoA) of radio-frequency waves due to limitations in packet structure and antenna configurations, which hinders accurate geolocation and direction finding applications.
Innovation Solution
The method involves generating and transmitting an AoA packet with a supplemental field and CRC, enabling another wireless device to determine the angle of arrival by processing the packet with an antenna array, even in systems that do not support the latest Bluetooth versions, by modifying the packet structure to include the supplemental field within the PDU payload and using a modified CRC system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the packet structure is modified to include a supplemental field for AoA determination, then the capability to determine angle of arrival is improved, but the device complexity increases
Solution Approach 1:
The supplemental field is nested within the existing PDU payload structure of the wireless communication packet. This allows the AoA determination functionality to be integrated into the standard packet format without requiring a completely new packet structure, thereby reducing the increase in device complexity while still providing the enhanced capability.
Solution Approach 2:
The modified packet structure with the supplemental field serves multiple functions: it maintains backward compatibility with existing wireless devices while enabling AoA determination capability. The same packet structure can be processed by both legacy devices (ignoring the supplemental field) and updated devices (utilizing the supplemental field for AoA calculation).
2Reliability
If a modified CRC system is used to ensure data integrity of the supplemental field, then the reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The CRC parameters are specifically configured to cover only the supplemental field within the PDU payload. By defining the CRC scope precisely, the system ensures data integrity of the critical AoA information without requiring excessive computational precision for the entire packet, thus balancing reliability with manufacturing precision requirements.
Solution Approach 2:
The CRC calculation is segmented to apply separately to different portions of the packet. The supplemental field has its own dedicated CRC for integrity verification, while the rest of the packet maintains its existing CRC mechanism. This segmentation allows targeted integrity checking without overcomplicating the overall system.
3Measurement precision
If the supplemental field is inserted into the PDU payload, then the AoA determination accuracy is improved, but the loss of time in packet processing increases
Solution Approach 1:
The supplemental field is prepared and inserted into the PDU payload during the packet generation phase, before transmission. This preliminary action ensures that when the receiving device processes the packet, the AoA information is already available in the correct format, reducing processing time compared to post-processing scenarios where additional fields would need to be appended or parsed from raw data.
Data Source
AI summary
In one aspect, a method of wireless communication by a wireless device includes generating, by the wireless device, a protocol data unit (PDU) header and a corresponding PDU payload of an angle of arrival (AoA) packet. The generating of the PDU payload includes inserting a supplemental field and a cyclic redundancy check (CRC) field into the PDU payload. The supplemental field is configured to enable another wireless device to determine an angle of arrival of the AoA packet and the CRC field corresponds to a CRC of at least the supplemental field. The method also includes transmitting the AoA packet with a single antenna of the wireless device.