Cooperative MIMO Spatial Channel Segmentation
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently utilizing licensed spectrum due to high costs and interference, limiting data bandwidth and coverage, especially in the US where legacy infrastructure costs are exponential and innovation is stifled by cross-licensing agreements and high hardware costs.
Innovation Solution
The implementation of Cooperative-MIMO processing that allows for the efficient parallel use of licensed spectrum by configuring base transceiver stations and user equipment to operate in a cooperative manner, exploiting control signaling and resource scheduling of legacy networks to provide high-bandwidth data services while avoiding interference and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dense deployment of infrastructure is implemented to enable multiple short-range low-power links to co-exist on the same time-frequency channel resource, then spectral efficiency is improved, but interference increases
Solution Approach 1:
The patent segments the wireless network into multiple hierarchical layers (macro-cells, micro-cells, pico-cells, femto-cells) that can operate simultaneously on the same frequency resources. Each layer serves different coverage areas and traffic types, allowing dense deployment without proportional interference increase because each segment is optimized for its specific range and load characteristics
Solution Approach 2:
The patent introduces vertical dimensionality by deploying infrastructure at multiple height levels and using three-dimensional spatial reuse. By utilizing different spatial layers and directions, the system enables multiple links to co-exist on the same frequency without traditional two-dimensional interference constraints, effectively adding a dimensional aspect to resource allocation
2Quantity of substance
If additional antennas are added to an access point to serve more users simultaneously via MU-MIMO, then multi-user capacity is improved, but channel correlation increases and spectral efficiency gains diminish
Solution Approach 1:
The patent segments the antenna system across multiple distributed access points rather than concentrating all antennas at a single location. This distributed antenna approach allows each access point to serve fewer users with lower channel correlation, while the network as a whole serves more users through spatial distribution, avoiding the diminishing returns of adding antennas at one location
Solution Approach 2:
The patent introduces a centralized controller as an intermediary that coordinates resource allocation, user assignment, and beamforming across multiple distributed access points. This controller optimizes the overall network performance by assigning users to specific access points based on channel conditions, load balancing, and interference management, preventing channel correlation issues that would arise from local optimization alone
3Object-affected harmful factors
If a centralized distributed antenna system is implemented to achieve cooperative MIMO, then interference suppression is improved, but infrastructure cost and complexity increase
Solution Approach 1:
The patent implements dynamic resource allocation where access points and users can change their roles, associations, and resource assignments in real-time based on traffic conditions, channel quality, and network load. This dynamic approach allows the system to achieve interference suppression benefits of centralized coordination without permanent complex infrastructure, as configurations can be reoptimized continuously with relatively simple changes
Data Source
AI summary
A wireless user equipment (UE) device is configured to communicate with another UE via device-to-device (D2D) communications. The UE transmits a communication to the other UE, wherein the communication indicates scheduling of a shared spectrum resource. The shared spectrum resource is shared by a first network management operator (NMO) and a second NMO, wherein both the UE and the other UE are associated with the first NMO. The first NMO employs a first set of spatial channels in the shared spectrum resource, and a second set of spatial channels in the shared spectrum resource is made available for use by the second NMO, the second set being different from the first set. The UE communicates with the other UE over the first set of spatial channels.