Extending MIMO Service via Remote Relay Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MIMO systems have limited coverage and capacity, particularly in cellular networks where line of sight transmission is impractical, and existing methods like space-time coding and spatial multiplexing are not effectively extended beyond the base station's coverage area.
Innovation Solution
A system comprising a base station, remote system, and host system communicatively coupled via fiber-optic links, where the base station generates downlink signal streams that are conveyed to the remote system for transmission, enabling MIMO service extension to remote coverage areas through multiple antennas and employing techniques like space-time coding and spatial multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO service is provided directly from base station, then signal diversity and channel capacity are improved, but coverage area is limited
Solution Approach 1:
The system segments the MIMO service provision into two parts: base station (providing signal diversity through multiple antennas) and remote system (extending coverage). The remote system acts as a separate entity that receives signals from base station via host system and retransmits them, thereby dividing the coverage extension function from the original base station and enabling extended coverage while maintaining signal diversity benefits.
Solution Approach 2:
The host system serves as an intermediary between the base station and the remote system. It receives downlink signal streams from the base station and conveys them to the remote system, which then transmits them to wireless communication devices. This intermediary structure enables coverage extension while preserving the MIMO signal diversity characteristics.
2Area of stationary object
If multiple remote systems are deployed to extend coverage, then coverage area is increased, but system complexity increases
Solution Approach 1:
The remote system is designed as a universal component that can be deployed in multiple locations to extend coverage to different remote areas. Each remote system performs the same function of receiving downlink signal streams from its associated host system and transmitting them wirelessly. This multi-functional design allows coverage extension to multiple areas without proportionally increasing overall system complexity, as each remote system is a standardized unit.
Data Source
AI summary
Disclosed herein is a method and system for extending MIMO service in a wireless communications system. The system comprises a base station, a remote system, and a host system communicatively coupled to the base station and the remote system. The base station is configured to generate, from a baseband signal, a downlink signal comprising a plurality of downlink signal streams, including at least a first downlink signal stream and a second downlink signal stream. Accordingly, the base station may include a first and a second antenna that are configured to transmit the first and second downlink signal streams, respectively. The remote system provides wireless service in a remote coverage area. Further, the remote system is configured to transmit a downlink signal as a plurality of downlink signal streams. The host system is communicatively coupled to the base station and to the remote system and configured to relay the downlink signal streams from the base station to the remote system.