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The Network Design Module, an add-on module to
EDX® SignalPro®, gives you a feature-rich, carrier-class, wireless
network planning tool. It is ideal for all stages of network design –
from initial deployment through network maturity, with special
emphasis on automatic processes and capacity and interference issues.
Included in the Network Design Module is a specific feature set for
designing Multipoint Systems. The Network Design Module also includes
specific feature sets for -Mobile and Nomadic Systems and WCDMA/UMTS
Systems. This document only covers the features that are specific to
Multipoint Systems.
Studies
Specialized Area Studies
Specifically for Point-to-Multipoint wireless broadband systems,
the Network Design Module includes essential, carrier-class, area-wide
studies:
- C/(I+N) based on
Frequency/Channel Plan Assignment
- Most Likely Server based on
C/(I+N)
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Strongest
CDMA Pilot
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True Multipoint Analysis
The Multipoint Systems features of EDX’s Network Design Module add
the ability to do true point-to-multipoint analysis with hub stations
serving a set of Customer Premise Equipment (CPE), each with
independently defined RF parameters and geographical locations. It is
not a “grid” analysis simulating multipoint. Only true multipoint
studies can provide simultaneous uplink/downlink or TDD system
analysis.
These multipoint studies are in addition to the included area-wide
studies showing line-of-site, signal, and interference analysis for
large areas.
Microwave Link Analysis
The multipoint studies calculate full microwave path analyses that
include rain and fade outage, percent availability, dispersive fade
margin, antenna diversity reception, and cross-link interference. You
can use the included or user-defined correlated rain fade on the
interference paths.
Multipoint Studies
You get the most comprehensive point-to-multipoint (PMP) system
analysis using network hubs and discrete CPE locations. PMP studies
include:
- Received signal levels downlink
and uplink for each CPE
- Interference levels downlink and
uplink for each CPE
- Fade margins downlink and uplink
for each CPE
- Adaptive automatic power control
on uplink to achieve reliability or fade margin targets (iterative
approach takes into account changing interference levels from
uplink power levels at their CPEs)
- For any CPE, view a list of five
strongest interferers for both downlink and uplink
- Select FDD or TDD multiplexing.
TDD analysis considers CPE-to-CPE and hub-to-hub interference in
addition to normal hub-to-CPE and CPE-to-hub
- Full multiple access capability
for evaluating TDMA and CDMA systems using any modulation type
including OFDM
- Link reliability analysis for
each CPE, both down link and uplink. Analysis includes fade and
rain outage effects.
- C/(I+N) using channel plan
(area-wide study)
- Best server based on best
channel (area-wide study)
Consecutive Link Network Analysis
For multiple link systems, there is a comprehensive consecutive
point network (CPN) system analysis using links in tandem, ring, or
mesh topologies.
Studies include:
- Full downlink and uplink
reliability analysis on each radio path
- Uplink and downlink
interference analysis
- An automatic ring network
layout constructs links to connect an arbitrary set of buildings
to be served
Interference Capabilities
For all interference studies, choose whether the C/(I+N) and BER
studies use noise only, interference only, or noise + interference in
the calculations. Also, specialized SDARS Interference studies are
available to identify areas where intermodulation at the receive site
occurs.
Advanced capabilities of this module also make it possible to consider
interference from a consecutive point network operating in the same
frequency range as your PMP system in your multipoint analysis.
FCC BRS/EBS/MMDS Two-Way Analysis
The Network Design Module has comprehensive Two-way interference
analysis as set forth in Appendix D of the FCC Part 21 MMDS Rules. All
calculation results are available in text and Excel format reports on
a composite and channel-by-channel basis. Study map results are
available in EDX format as well as MapInfo® and Arc View® format on a
composite basis.
Features
Number of Available Servers Study
Automatically Estimate Your
System Capacity
The Network Design Module can automatically lay out multi-sector
hubs as well as CPE systems. You can use the automatic CPE
layout features to help you estimate demand in your service
area. For instance, you can have the Network Design Module
distribute a set number of CPEs in your service area,
group-by-group. Each group would have a unique traffic demand
(uplink and downlink) and RF equipment settings. Each group can
be automatically distributed in your service area, with
placement being weighted by meaningful criteria such:
- Land use (clutter) data
classifications
- Demographic data by city
block
- Traffic data
- Building rooftops
- Uniform & fixed grid
Once you have your multiple groups
set, you can combine all groups in your final system analysis in order
to estimate the total demand on your network, taking into
consideration the many customer configurations that you expect.
Traffic Modeling
The Network Design Module automatically predicts traffic for each
access point sector, estimating the total data traffic load in Mbps
per sector. The loading is generated based on:
- Land use data
- Demographic data
- Traffic data
- Uniform distribution of
traffic
Automatic Frequency Planning
EDX offers an exclusive demand-based channel assignment algorithm
for studying Point-to-Multipoint networks. This algorithm provides
much greater capacity than block channel assignments using frequency
re-use theories.
Downlink-only assignment is also included if you only want to consider
hub-to-hub interferences.
Overbooking
When assigning channels you can put multiple users on the same channel
to achieve the desired service level.
Automatic Power Control
Automatic Power Control (APC) adjusts to overcome noise and
interference. The APC objective can be set by the user as percent
service availability or fade margin.
IEEE 802.16
For all types of 802.16 systems, the Network Design Module includes
appropriate propagation models, equipment parameters, study types, and
network design features. Whether your customers are fixed, nomadic, or
mobile, you have all of the features you need to design your network
and plan for future growth.
Antennas
Transmit and receive antennas can be specified as full 3D patterns.
Polarization, mechanical beam tilt, and beam tilt azimuth can be
specified independently. Supports both co-polarized and
cross-polarized directional transmit and receive antennas.
Adaptive Antennas
You can specify adaptive “smart” antennas for both hubs and CPEs.
An external DLL file that contains the adaptive algorithm can be
linked to EDX® SignalPro®. Signal level and C/I ratio results will
take into account the improved gain and interference rejection.
Multi-Channel CPEs
For each CPE, you can specify up to 8 uplink and downlink channels.
This unique capability gives you more flexibility in designing
cutting-edge networks.
Technologies
Multiple Access
Supports multiple access technologies, including FDMA, TDMA, CDMA, FDD,
and TDD. For OFDM and other spread spectrum technologies, you have
control over frequency assignments.
Adaptive Modulation Types
Data rate and bit error rate studies consider adaptive modulations
schemes for the most refined study results. |
