Multi-radio Communication Link Using Low Data-rate Radio for Acknowledgments
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Solution Overview
Problem
Conventional multicast and broadcast communication schemes in packet radio networks lack reliability due to low data rate and high power consumption, and suffer from data collisions when multiple groups interfere with each other.
Innovation Solution
Establishing a link using a low data-rate radio (LDR) to transmit data frames and receive acknowledgments, allowing for proactive or reactive approaches to determine LDR availability and establish connections, thereby reducing power consumption and improving data reliability by using LDR for acknowledgments and HDR for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multicast and broadcast communication schemes are used without ACK requests, then power consumption is reduced and transmission simplicity is improved, but data reliability deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism (ACK request frame and ACK frame) between the transmitter and receiver to improve data reliability. The receiver sends an ACK request frame after successfully receiving a data frame, and the transmitter retransmits if no ACK is received, thereby ensuring reliable delivery without requiring the transmitter to continuously monitor channel status
Solution Approach 2:
The patent applies partial action by selectively enabling ACK requests only for specific data frames that require reliable delivery, rather than for all transmissions. This allows the system to maintain low power consumption for non-critical traffic while ensuring reliability for important data, achieving a balance between energy efficiency and data reliability
2Reliability
If link data rate is reduced to improve data reliability, then data reliability is improved, but productivity deteriorates due to inability to transmit massive capacity multimedia stream
Solution Approach 1:
The patent implements dynamic adaptation by allowing the system to adjust transmission parameters based on channel conditions and data requirements. The transmitter can dynamically decide whether to request ACKs for specific frames based on the importance of the data and current channel quality, enabling reliable transmission of high-rate multimedia streams without sacrificing overall productivity
3Adaptability or versatility
If multiple groups perform multicast and broadcast communication simultaneously, then service coverage is improved, but data loss increases due to collision from interference between adjacent groups
Solution Approach 1:
The patent employs feedback mechanisms where receivers send ACK request frames back to transmitters. This feedback allows transmitters to detect whether their transmissions were successful or interfered with by other groups, enabling them to retransmit lost packets and thereby maintain reliable communication even in multi-group scenarios
Data Source
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AI summary
Provided is a communication method and apparatus using a multi-radio. The communication method includes establishing a link via at least one node included in a group that uses a low data-rate radio (LDR); transmitting a data frame to the at least one node included in the group; and receiving, using a multi-radio based on an availability of the LDR, an acknowledgement (ACK) with respect to the transmitted data frame.