MU-MIMO Pairing Across Base Station Sectors
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Solution Overview
Problem
Traditional MU-MIMO pairing of mobile handsets with base stations is limited to orthogonal separation of at least 90 degrees within a single sector, restricting the number of simultaneous pairings and inefficient use of physical air resources, as local monitoring only allows for two users to be paired within each 120-degree sector.
Innovation Solution
A central server monitors the locations of mobile handsets across multiple sectors, determining and facilitating MU-MIMO pairings across different sectors and access points based on angle separation, enabling pairing even when handsets have at least 90 degrees of separation relative to a common transmitting/receiving component, thereby enhancing resource efficiency and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If local monitoring is used for MU-MIMO pairing within a single sector, then the pairing process is simple and fast, but the number of simultaneous pairings is limited to two users per 120-degree sector
Solution Approach 1:
The patent merges the pairing coordination function from local sector-level monitoring to a central server that monitors across multiple sectors. This allows the system to combine pairing opportunities from different sectors, enabling more than two users to be paired simultaneously by considering angular separation across the entire 360-degree broadcast arc rather than being constrained to a single 120-degree sector.
Solution Approach 2:
The patent introduces a central server as an intermediary that performs the pairing coordination function. This server receives location information from mobile handsets, calculates angular separations across different sectors, and determines optimal MU-MIMO pairings. This intermediary approach resolves the complexity of multi-sector coordination by centralizing the calculation function rather than requiring distributed decision-making at each sector.
2Loss of energy
If MU-MIMO pairing is restricted to orthogonal separation of at least 90 degrees within a single sector, then the pairing criteria are simple, but physical air resources are used inefficiently
Solution Approach 1:
The patent extends the pairing evaluation from a two-dimensional sector-based approach to a three-dimensional spatial approach by considering angular separation across multiple sectors. The central server evaluates the angular position of handsets relative to the base station across the entire 360-degree broadcast arc, allowing pairings that would be impossible within a single sector but are valid when considering the full spatial arrangement across multiple sectors.
3Productivity
If a central server monitors locations across multiple sectors, then the number of possible MU-MIMO pairings increases, but the system complexity and processing requirements increase
Solution Approach 1:
The patent implements preliminary action by having the central server continuously monitor and store location information from mobile handsets before pairing decisions are needed. The server pre-calculates angular separations and maintains updated spatial awareness of all active handsets across sectors, so that when pairing opportunities arise, the server can quickly determine valid pairings without performing complex real-time calculations from scratch.
Data Source
AI summary
A method and system for providing MU-MIMO pairings of mobile handsets in a network is provided. In one embodiment, the method includes facilitating MU-MIMO pairings of mobile handsets served by different transmitting/receiving components serving individual sectors of a base station using a central monitoring server and location information for each of the mobile handsets. In another embodiment, the method includes facilitating MU-MIMO pairings between mobile handsets served by different transmitting/receiving components in different sectors of coverage across separate access components using a central monitoring server and location information for each of the mobile handsets.