Intermediate Distribution Frame for Radio Head Cable Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In distributed wireless communication systems, existing technologies face challenges in efficiently managing cable connections between central controllers and radio heads, particularly in large deployments where long cable runs are needed, leading to increased costs and potential latency issues that hinder multi-user MIMO functionality.
Innovation Solution
The implementation of an intermediate distribution frame (IDF) that receives data from a central controller, recovers the clock, multiplexes data, and transmits it to radio heads via I/O interfaces, reducing cable requirements and enabling low latency and precise clock synchronization, thereby supporting MU-MIMO operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If direct cable connections are used between central controller and radio heads in large deployments, then cable runs become excessively long, but this increases costs and introduces latency issues
Solution Approach 1:
The patent segments the direct connection path by introducing intermediate distribution frames (IDFs) between the central controller and radio heads. This divides the long cable run into multiple shorter segments, reducing the length of individual cables while maintaining system connectivity and reducing latency.
Solution Approach 2:
The patent employs intermediate distribution frames as mediator devices that receive data from the central controller and forward it to multiple radio heads. These IDFs act as intermediaries that reduce the effective cable length required and enable better clock synchronization for MU-MIMO operations.
2Device complexity
If traditional distribution frames are used, then cable management becomes complex, but this increases device complexity and installation difficulty
Solution Approach 1:
The patent designs the intermediate distribution frame to perform multiple functions: data forwarding, clock recovery, and signal distribution to multiple radio heads. This multi-functionality consolidates what would otherwise require complex separate systems into a single device, simplifying cable management and installation.
Solution Approach 2:
The intermediate distribution frame serves as a mediator that simplifies the connection architecture between the central controller and multiple radio heads. By providing a standardized interface and centralized management point, it reduces the complexity of cable management and eases installation compared to direct point-to-point connections.
3Speed
If long cable runs are used to connect remote radio heads, then latency increases, but this hinders multi-user MIMO functionality
Solution Approach 1:
The intermediate distribution frame acts as a mediator that enables precise clock synchronization between the central controller and remote radio heads. By recovering and distributing synchronized clocks through the IDF, the system maintains timing accuracy over long cable runs, which is essential for MU-MIMO operations.
Solution Approach 2:
By segmenting the connection through intermediate distribution frames, the patent reduces the latency accumulated over long cable runs. Each segment can maintain better timing synchronization, enabling MU-MIMO functionality to operate reliably even when radio heads are located remotely.
Data Source
AI summary
Embodiments herein describe using an intermediate distribution frame (IDF) which is connected between a central controller and a plurality radio heads which each include at least one antenna for wireless communication with a user device. Instead of running separate cables to each of the radio heads, a single cable can be used to connect the IDF to the central controller and then separate cables can be used to connect the IDF to the radio heads. If the IDF is disposed near the radio heads, the amount of cables can be reduced. Moreover, the IDF may recover a clock signal used by the central controller and forward that clock to the plurality of radio head in order to synchronize the radio heads to the central controller.