Coordinated Uplink MU-MIMO Resource Sharing for OBSS Interference
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Solution Overview
Problem
The 60GHz band in wireless communication experiences high free space loss due to atmospheric attenuation and absorption, which complicates coordinated uplink transmissions in multiple-user multiple-input-multiple-output (MU-MIMO) systems, leading to interference from overlapping basic service sets (OBSS) and reduced spatial multiplexing capabilities.
Innovation Solution
Implement coordinated uplink MU-MIMO protocols that utilize unused spatial dimensions at an access point to null interference from overlapping basic service sets (OBSS) transmissions, allowing for simultaneous uplink transmissions across multiple basic service sets by sharing resources and synchronizing transmit power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coordinated uplink MU-MIMO transmissions are implemented in the 60GHz band, then spatial multiplexing capabilities and data transmission efficiency are improved, but interference from overlapping basic service sets and free space loss worsen
Solution Approach 1:
The patent utilizes unused spatial dimensions at the access point to null interference from overlapping basic service sets. By operating in the spatial domain and employing multi-dimensional signal processing techniques, the system can separate desired signals from interfering signals, effectively managing interference while maintaining high data transmission efficiency in coordinated uplink MU-MIMO systems
Solution Approach 2:
The patent implements power control mechanisms that adjust transmit power levels dynamically. By changing power parameters and coordinating power levels across multiple basic service sets, the system reduces interference while maintaining productivity in the 60GHz band, directly addressing the contradiction between high data transmission efficiency and interference management
2Reliability
If multiple small antennas are used to compensate for free space loss, then signal transmission is improved, but device complexity and coordination requirements increase
Solution Approach 1:
The patent combines multiple small antennas into a phased array system where the antennas work together as a coordinated unit. By merging the functionality of individual antennas into a unified beamforming system, the patent achieves reliable signal transmission through constructive interference while managing complexity through centralized control and coordination protocols
3Productivity
If resources are shared across multiple basic service sets, then spatial multiplexing capabilities are enhanced, but interference management and power control complexity increase
Solution Approach 1:
The patent creates a universal resource sharing framework where unused spatial dimensions and power control mechanisms serve multiple basic service sets simultaneously. The access point's unused spatial dimensions can be allocated to different OBSS transmissions, and power control protocols can be applied across multiple service sets, enhancing spatial multiplexing capabilities while managing coordination complexity through standardized multi-functional protocols
Data Source
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AI summary
Certain aspects of the present disclosure are directed to an apparatus for wireless communication. The apparatus generally including a processing system configured to generate a first frame including an indication of whether resources are available to be shared with a first one or more wireless nodes, where the apparatus is part of a first basic service set and the first one or more wireless nodes are part of one or more second basic service sets, and a first interface configured to output the first frame for transmission.