Wireless Transmission Scheduling via Receiving Device Feedback
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Solution Overview
Problem
Existing approaches to spatial reuse in wireless networks do not consider the receiving device's ability to receive and decode packets, or to transmit acknowledgement messages, leading to potential interference and retransmissions.
Innovation Solution
A method where a transmitting device obtains information about the radio conditions experienced by receiving devices and determines whether to transmit based on this information, considering the potential interference and the receiving device's ability to receive and decode packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a transmitting device transmits packets without considering receiving device's channel conditions, then spatial reuse is increased, but interference to ongoing transmissions increases and retransmissions occur
Solution Approach 1:
The transmitting device obtains feedback information from receiving devices about channel conditions, including measurements of interfering transmissions and indicators of receiving ability. This feedback enables the transmitting device to adjust its transmission decisions dynamically, ensuring transmissions only occur when receiving devices can successfully decode packets and send acknowledgments, thus resolving the contradiction between increasing spatial reuse and maintaining transmission reliability
Solution Approach 2:
Before transmitting packets, the transmitting device performs preliminary assessment by obtaining information about the receiving device's ability to receive and decode packets under current channel conditions. This preliminary action prevents unnecessary transmissions that would fail, thereby maintaining reliability while enabling spatial reuse through informed transmission decisions
2Device complexity
If transmitting devices ignore receiving device's ability to transmit acknowledgements, then channel access is simplified, but interference causes failed acknowledgements and retransmissions
Solution Approach 1:
The system incorporates feedback from receiving devices about their ability to transmit acknowledgements under current channel conditions. This feedback includes measurements of interfering transmissions on uplink channels and assessments of whether acknowledgements can be successfully transmitted. By considering this feedback, the transmitting device avoids sending packets when acknowledgements would fail, maintaining effective throughput without significantly increasing complexity
Solution Approach 2:
Receiving devices autonomously assess their own ability to receive and decode packets and to transmit acknowledgements based on measurements of interfering transmissions. This self-assessment capability eliminates the need for complex centralized coordination, keeping device complexity low while ensuring reliable transmission and acknowledgment exchange that maintains productivity
Data Source
AI summary
One aspect of the disclosure provides a method performed by a transmitting device, for transmitting wirelessly to a receiving device in a wireless network. The method comprises: obtaining information which is indicative of a level of wireless activity caused by interfering transmissions by one or more interfering devices, experienced by one or more receiving devices on one or more first channels configured for transmissions by the one or more receiving devices; and determining whether to transmit to a receiving device of the one or more receiving devices using one or more second channels based on the information indicative of the level of wireless activity experienced by the one or more receiving devices on the one or more first channels.