Receiver Feedback for Wireless Resource Collision Avoidance
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Solution Overview
Problem
In wireless communication systems, overlapping resource reservations between transmitting devices can lead to collisions and interference, as devices may not be aware of each other's reservations, especially in cases where one device is outside the link budget range of the other's control transmissions.
Innovation Solution
The proposed solution involves techniques and approaches that enable receiving devices to identify overlapping reservations and determine which transmission should proceed, thereby reducing interference. This is achieved by applying a global rule among receiving devices to identify the transmitting device that should be informed about collisions, allowing them to back off from transmitting on reserved resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmitting devices reserve resources autonomously without centralized coordination, then device complexity and communication latency are reduced, but resource collisions and interference increase
Solution Approach 1:
The patent implements a feedback mechanism where receiving devices monitor resource reservations and send collision indications back to transmitting devices. When a receiving device detects overlapping reservations, it transmits a collision indication to the transmitting device with the strongest signal, enabling the transmitter to back off and select alternative resources, thus resolving collisions while maintaining autonomous operation
Solution Approach 2:
The patent introduces receiving devices as intermediaries that mediate between multiple transmitting devices. These receiving devices monitor resource reservations, detect collisions, and facilitate resolution by transmitting collision indications to the appropriate transmitting devices, enabling decentralized conflict resolution without centralized coordination
2Reliability
If transmitting devices increase transmission power to ensure reception, then communication reliability improves, but interference to other transmissions increases
Solution Approach 1:
The patent implements dynamic transmission power adjustment based on collision feedback. When a transmitting device receives a collision indication, it backs off and selects alternative resources, effectively reducing its transmission power impact on conflicting transmissions. This dynamic adjustment allows the device to maintain high power when needed while reducing interference when collisions are detected
Data Source
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AI summary
A receiving device identifies a collision between first resources reserved by a first transmitting device and second resources reserved by a second transmitting device and transmits a collision indication to the first transmitting device or the second transmitting device based on the identified collision. A transmitting device that receives a collision indication from the receiving device backs off from transmitting during the resources received by the resource reservation in response to receiving the collision indication from the receiving device.