User's Manual
Table Of Contents
- 1 Introduction
- 2 The Concept
- 3 BreezeCELL Architecture
- 4 BreezeCELL Network Elements
- 5 Frequency Allocations
- 6 MIMO Support
- 7 Monitoring & Control
- 8 Installation Requirements and Procedures
- 9 Headend Equipment Installation
- 9.1 Connector Information
- 9.2 Rack Installation
- 9.3 Connecting the BreezeCELL Equipment
- 9.4 Connecting the Monitoring System
- 9.5 Connecting External Alarms
- 9.6 Connecting the Base Stations
- 9.7 UDC Configuration
- 9.8 Pilot Master/Slave Configuration
- 9.9 Measurements
- 9.10 Connecting to the Coax TV Networks
- 9.11 Measurements
- 9.12 Localized Testing Port
- 9.13 Determining BTS Output Power VS. Remote Unit Output Power
- 10 Coax Network Amplifier Installation (if applicable)
- 11 Remote Unit Installation
- 12 Preparing for Remote Unit Installation
- 13 Normal Operations
- 14 Acceptance Testing
In-building Cellular Solution for Commercial Buildings UDC Software Configuration Tool
BreezeCELL
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Figure 2: Typical Cable Network
3.2.1 Frequency Limitations
In order to pass through frequencies of 960 to 1155 MHz we need to examine the frequency
limitations of the coax network elements. The only limiting element in the coax network is the amplifier
used to boost the signal which is bypassed by the DAS system. All other elements namely coax cables,
connectors, taps, power dividers and outlets are capable of handling the required frequencies.
3.2.2 BreezeCELL Solution
Wireless equipment is installed at the entry point of the TV signals to the building. The TV signals entry
point may be a terrestrial antenna, a satellite dish or CATV feed. In some cases, like hotels, the source
of the TV signals may be a stack of CATV or satellite receivers and a VOD/PPV system. The wireless
equipment may be a microcell, a picocell or a wireless repeater.
The wireless signal is shifted in frequency to the Alvarion band and then combined with the TV signals.
Since the Alvarion band is above the TV signal band, there is no interference between the two signals.
The combined signal is propagated along the coaxial network down to the TV outlets. In order to
overcome the frequency limitation of the cable amplifier a bypass circuit is used to separate the wireless
signal, amplify it and then recombine the frequencies. At the end user’s TV outlet a small CPE called
Remote is connected which transmits the wireless signals indoors at their original licensed frequency.
In the case of TDD transmissions such as WiMAX, the BreezeCELL equipment converts the TDD signal
to FDD at both ends of the system (Headend and Remote). TDD synchronization is run over the system.
It is important to note that there is no modification to the original signal generated by the Wireless
equipment. BreezeCELL is an active DAS, carrying the signal to the remote small antenna (Remote)
where it radiates in its original form.
The following diagram illustrates the BreezeCELL network overlaying the cable TV infrastructure: