Reservation Signal Hearability in Wireless Spectrum Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face interference issues due to the inability of low-power network operating entities to detect reservation signals from high-power entities, leading to inefficient spectrum sharing and increased interference in priority-based access schemes.
Innovation Solution
Low-power network operating entities transmit reservation signals at a higher power spectral density (PSD) level or with extended duration to improve detectability, and high-power nodes are configured with increased receiver sensitivity to enhance signal detectability, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low-power network operating entities transmit reservation signals at normal PSD levels, then energy consumption is reduced, but the reservation signals become undetectable by high-power entities causing interference
Solution Approach 1:
The patent changes the power spectral density (PSD) parameter of reservation signals transmitted by low-power entities. Specifically, these entities transmit reservation signals at higher PSD levels (e.g., 23 dBm/Hz) compared to their normal communication signals, enabling detection by high-power entities while managing energy consumption through selective application of high PSD only during reservation signaling.
Solution Approach 2:
The patent implements preliminary action by having low-power entities transmit reservation signals before actual data transmission. This advance signaling allows high-power entities to detect and avoid interfering with upcoming transmissions, preventing harmful interference before it occurs rather than dealing with it during communication.
2Reliability
If high-power network operating entities use medium-sensing procedures like LBT, then interference avoidance is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent uses preliminary reservation signaling where low-power entities transmit advance notice of their intended transmissions. High-power entities can detect these reservation signals and proactively avoid scheduling interfering transmissions, eliminating the need for time-consuming LBT procedures and reducing signaling latency.
Solution Approach 2:
The reservation signal acts as an intermediary mechanism between low-power and high-power entities. Instead of requiring complex real-time sensing and coordination, the reservation signal provides simple advance notice that enables high-power entities to make straightforward interference avoidance decisions.
3Measurement precision
If low-power entities transmit reservation signals at higher PSD levels, then signal detectability by high-power entities is improved, but the complexity of power management increases
Solution Approach 1:
The patent applies parameter changes selectively only to reservation signals rather than all transmissions. Low-power entities transmit reservation signals at elevated PSD levels (e.g., 23 dBm/Hz) while maintaining normal power levels for data communication, thereby improving detectability without requiring complex continuous power management across all signal types.
Data Source
AI summary
Wireless communications systems and methods related to improving detectability of interference management signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first reservation signal indicating a reservation for a first transmission slot in a spectrum accessed by a plurality of network operating entities. The first wireless communication device and the second wireless communication device are associated with a first network operating entity of a plurality of network operating entities. The first reservation signal includes a duration based on a power class associated with the first network operating entity. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in the first transmission slot.