Distributed Antenna System IP Data Transport
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Solution Overview
Problem
Distributed Antenna Systems (DAS) lack the capability to efficiently facilitate supplemental data communication over their transport medium, limiting their functionality beyond primary RF services.
Innovation Solution
Adapting the digital RF transport medium to enable point-to-point Ethernet connections, allowing Internet Protocol (IP) data traffic to be carried simultaneously with RF traffic, thereby enabling the installation of IP devices at remote locations for extended network connectivity and various services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the DAS transport medium is used only for RF signal transmission, then the system maintains simple architecture and reliable RF service, but the system lacks supplemental data communication capability and functional versatility
Solution Approach 1:
The transport medium is adapted to carry both RF traffic and IP data traffic simultaneously, transforming a single-function medium into a multi-functional carrier. This is achieved by encoding IP data packets onto the same transport infrastructure used for RF signals, enabling the DAS to provide both wireless communication and wired network connectivity through a unified system.
2Adaptability or versatility
If IP devices are installed at remote locations, then network connectivity and services are extended to remote areas, but the system complexity increases and requires adaptation of existing infrastructure
Solution Approach 1:
The DAS remote units, which already exist in the system for RF distribution, are made to serve dual purposes by enabling IP device connectivity. The existing transport infrastructure between host units and remote units is leveraged to provide network access, eliminating the need for separate wiring to remote locations and allowing the system to serve itself for both RF and data functions.
Solution Approach 2:
The same transport medium and remote unit infrastructure that provides RF signal distribution is adapted to also carry IP data traffic, enabling remote IP device connectivity without requiring separate dedicated wiring to remote locations. This multi-functional use of existing infrastructure simplifies installation compared to building parallel networks.
3Adaptability or versatility
If the transport medium carries both RF and IP traffic, then supplemental data communication is enabled, but signal interference and transmission reliability may deteriorate
Solution Approach 1:
The transport medium transmission is segmented into distinct time slots or channels, with separate allocations for RF traffic and IP data traffic. This segmentation prevents signal interference by ensuring that RF and data signals do not compete for the same transmission resources simultaneously, maintaining the reliability of both communication types while enabling supplemental data functionality.
Data Source
AI summary
Systems and methods for IP communication over a distributed antenna system transport are provided. In one embodiment, a method for providing Ethernet connectivity over a distributed antenna system comprises receiving internet protocol (IP) formatted data from an internet protocol device coupled to a remote unit of a distributed antenna system; sampling wireless radio frequency (RF) signals received at the remote unit to produce digitized RF samples; generating a serial data stream for output to a host unit of the distributed antenna system, the serial data stream further comprising a multiple-timeslot communication frame providing a first partition of bandwidth for transporting the digitized RF samples and a second partition of bandwidth for implementing an Ethernet pipe for transporting the IP formatted data.