Interleaved MIMO Cell Bonding in Distributed Antenna Systems
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Solution Overview
Problem
Distributed antenna systems (DAS) face challenges in providing uniform MIMO coverage due to the need for multiple co-located remote units, which increases complexity and cost, while existing solutions struggle to optimize MIMO communications services without requiring extensive infrastructure changes.
Innovation Solution
The implementation of interleaved MIMO communications services, where adjacent remote units with non-overlapping coverage areas receive separate MIMO streams, allowing for MIMO cell bonding without the need for co-location, and the use of distinct physical layers to distribute MIMO communications streams, enabling efficient configuration and reconfiguration of MIMO services within existing infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple co-located remote units are deployed to provide uniform MIMO coverage, then MIMO service quality is improved, but system complexity and cost increase
Solution Approach 1:
The patent segments the MIMO service provision into two distinct components: co-located remote units provide control channel MIMO services, while non-co-located remote units provide data channel MIMO services. This segmentation allows the system to achieve uniform MIMO coverage without requiring all remote units to be co-located, thereby reducing system complexity while maintaining service quality.
Solution Approach 2:
The patent makes remote units universal by enabling them to serve different MIMO functions based on their location. Remote units can dynamically provide control channel MIMO when co-located with other units, and data channel MIMO when non-co-located. This multi-functionality allows the same infrastructure to deliver comprehensive MIMO coverage without requiring specialized hardware for different scenarios.
2Reliability
If multiple co-located remote units are deployed to provide uniform MIMO coverage, then MIMO service quality is improved, but deployment cost increases
Solution Approach 1:
By segmenting MIMO services into control and data channels with different location requirements, the system reduces the number of co-located remote units needed. Control channel MIMO requires co-location, but data channel MIMO can be provided by non-co-located units, thereby reducing overall deployment cost while maintaining service quality.
Solution Approach 2:
The patent applies partial co-location strategy where only the minimum necessary remote units are co-located to provide control channel MIMO, while data channel MIMO is provided by additional non-co-located units. This partial action approach achieves the required MIMO service quality without the excessive cost of fully co-locating all remote units.
3Ease of manufacture
If existing infrastructure is used without changes to provide MIMO services, then deployment simplicity is improved, but MIMO service capability is limited
Solution Approach 1:
The patent introduces dynamic service assignment where remote units can switch between providing control channel MIMO and data channel MIMO based on their operational context and location. This dynamic capability allows the existing infrastructure to adapt to different MIMO service requirements without physical reconfiguration, enhancing versatility while maintaining deployment simplicity.
Solution Approach 2:
The system changes operational parameters (service type assignment, routing configurations) rather than physical infrastructure to enable MIMO services. By modifying software-controlled parameters, the existing infrastructure gains enhanced MIMO capability without requiring extensive physical changes.
Data Source
AI summary
Distributed communications systems (DCSs) supporting configuring or reconfiguring the distribution of MIMO communications streams to designated remote units in the DCS to provide interleaved MIMO cell bonding of remote units are disclosed. In one example, the DCS includes different physical layers that are maintained from the central unit to the remote units. In this manner, the central unit can be configured or reconfigured to distribute separate MIMO communications streams to the desired physical layers in the DCS to support distributing MIMO communications streams to the desired remote units to provide the desired interleaved MIMO communications services. In this manner, interleaved MIMO communications services can be configured for a DCS using an existing infrastructure of remote units having substantially non-overlapping remote coverage areas, by directing the MIMO communications streams over the configured physical layers to be provided to the desired remote units to facilitate interleaved MIMO cell bonding of remote units.