NFC Sending Rate Control Using Cross-Layer Channel Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing near-field wireless communication technologies face challenges in accurately adjusting the sending rate of the transport layer due to the time-varying nature of radio channels, leading to inefficiencies such as low throughput or packet loss.
Innovation Solution
A method that adjusts the sending rate by combining transport layer information with physical layer channel information from both the transmit and receive links, using mechanisms like packet encapsulation and sharing to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sending rate of the transport layer is increased, then the throughput is improved and link bandwidth is utilized more effectively, but queuing delay increases and packet loss occurs
Solution Approach 1:
The patent implements feedback mechanisms where the receiving device sends acknowledgment packets containing channel quality information back to the sending device. The sending device continuously adjusts its sending rate based on this feedback about packet loss, queuing delay, and channel conditions, creating a closed-loop control system that balances throughput and reliability
Solution Approach 2:
The patent makes the sending rate dynamic rather than fixed. The sending device continuously adapts the sending rate based on real-time channel conditions, packet loss rates, and queuing delays. This dynamic adjustment allows the system to optimize throughput when conditions are good while preventing packet loss when conditions deteriorate
2Productivity
If the sending rate of the transport layer is increased, then the link bandwidth is utilized more effectively, but queuing delay increases
Solution Approach 1:
The receiving device monitors queuing delay and sends this information as feedback to the sending device. The sending device uses this feedback to adjust the sending rate, reducing it when queuing delay becomes excessive and increasing it when delay is acceptable, thereby optimizing bandwidth utilization while controlling delay
Solution Approach 2:
The system performs preliminary actions by proactively adjusting the sending rate before severe packet loss or excessive delay occurs. By monitoring channel conditions and adjusting the sending rate in advance, the system prevents rather than merely reacts to performance degradation
3Adaptability or versatility
If congestion control is implemented at the transport layer, then the sending rate can be adjusted, but the adjustment accuracy is poor due to time-varying radio channels
Solution Approach 1:
The patent merges transport layer congestion control with physical layer channel information. By combining high-level application requirements with low-level radio channel characteristics, the system achieves more accurate sending rate adjustments than either layer could achieve alone
Solution Approach 2:
The patent introduces an intermediary mechanism that translates physical layer channel conditions into transport layer sending rate adjustments. This intermediary layer processes raw channel measurements and converts them into actionable rate control decisions, improving the precision of the adjustment
Data Source
AI summary
A method for adjusting a sending rate in a near-field communication scenario includes obtaining, by a sending device, transport layer information of a connection between the sending device and a receiving device, physical layer channel information of a transmit link on which the sending device is located, and physical layer channel information of a receive link on which a receiving device of the data is located, and adjusting a sending rate of a transport layer of the sending device based on the transport layer information, the physical layer channel information of the transmit link, and the physical layer channel information of the receive link.