SUBMITTED BYNAME-DEEPANJAN MANDAL;
CLASS ROLL NO-38;
UNIVERSITY ROLL NO-10900111038;
SECTION-A;DEPARTMENT-C.S.E
CONTENTS

 Current situation.
 What is X-max Technology?
 X-max Technologies Network Architecture.
 How it works?
 Conclusion.
Current situation

 Current situation Customers are demanding more
and more data applications to be delivered on the go.
However, the operator is using scarce expensive
licensed spectrum that is overburdened with
delivering core voice.
 The operator is facing a choice of acquiring more
licensed spectrum or losing customers due to
demand for advanced services.
Cognitive radio


Cognitive radio : Cognitive radio (CR) is a form of
wireless communication in which a transceiver can
intelligently detect which communication channels
are in use and which are not, and instantly move into
vacant channels while avoiding occupied ones.
 This optimizes the use of available radio-frequency
(RF) spectrum while minimizing interference to
other users.
What is XG ?

 xG Technology, Inc. is developer of technology
for wireless communications.
 The company developed cognitive radio technology for
mobile services using licensed or unlicensed radio
spectrum.xG’s initial product is xMax, a carrier-class
cognitive radio network. xMax is a
mobile VoIP and broadband data system with an end-toend Internet Protocol (IP) system architecture.
 The company deployed a 30-square-mile (78 km2) xMax
network in the Fort Lauderdale, Florida area
xMAX technology

 xMAX technology : xMax’s standards-based IP
architecture minimizes network deployment.
 Using field-proven cognitive radio technology, xMax
enables the delivery of mobile services in both
licensed and unlicensed bands.
xMAX cellular network

xMAX cellular
architecture

 . The following are the major components of the
system:
 xMod
 xAp
 xMSC
 x Monitor/x Drive
Xmod

 Xmod : The xMod is a small battery that bridges the
COTS end user device to the wideband transport
layer of the xMax system.
 Devices connected via secure Wi-Fi links.
 The xMod can deliver up to 3.5Mbps to the
connected end user device(s).
Xap

 Xap : The xAP acts as a compact, high-performance
base station and wirelessly connects to the xMod
using the xMax cognitive networking waveform.
 Each xAP can deliver up to 14 Mbps to its associated
xMods.
 xAPs may be deployed individually or in clusters of
up to 9 xAPs to increase total throughput.
Xmsc

 X msc: The xMSC acts as both a base station
controller and aggregation point for the connected
xAPs.
 The xMSC is typically connected to the worldwide
Internet.
x Monitor/x Drive

xMonitor is a component of the xMax-xMSC that monitors
the status and health of xMax network elements. It provides
end-to-end IP network management and monitoring
services, services, allowing support personnel to quickly
gather information about xMax networks.
xDrive is a drive mapping utility designed to gather, display,
and log performance statistics from xMod and xVM mobile
hotspot devices. It allows field technicians to map the
coverage of a deployment of xMax access points (downlink),
as well as providing user-to-network (uplink) statistics.
Working of x-Max
Technology

 WORKING OF XMAX TECHNOLOGY ADVANCED COGNITIVE SENSING.
 MITIGATING INTERFERENCE.
 ADVANCED ANTENNA.
Advanced Cognitive
Sensing

 Conventional, or “dumb” radios, have been designed
with the assumption that they were operating in a
spectrum band that was free of interference. As a result,
there was no requirement to endow these radios with the
ability to dynamically change parameters, channels or
spectrum bands in response to interference.
 xMax cognitive radios can identify potential impairments
to communications quality, like interference, path loss,
shadowing and multipath fading. They can then adjust
their transmitting parameters, such as power output,
frequency, and modulation to ensure an optimized
communications experience for users.
Mitigating Interference

 interference works against reliable and efficient wireless
communications. Interference can negatively impact
performance and coverage, and is the chief limiting factor
in high-capacity mobile systems. interference is
responsible in many cases for dropped calls, slow
download speeds and shortened battery life.
 xMax leverages proprietary xG developed technology to
implement two key approaches to dealing with
interference.
 The first is Dynamic Spectrum Access (DSA) and
 Second one is by using 2x4 MIMO antenna
configurations.
Dynamic Spectrum
Access (DSA)

 xMax uses its real time sensing of interference on a
channel to instantly change channels when better
frequencies are detected. However, xMax goes
beyond simple DSA by incorporating sophisticated
interference mitigation (IM) software that enables
xMax to reliably operate on interference laden
channels that other radio systems could not operate
on. When xG’s interference mitigation technology is
added to its DSA capabilities, xMax can greatly
increase the capacity of both new and existing
spectrum assets.
2x4 MIMO antenna
configurations.

 The xMax radios employ new and powerful parallel processing
digital signal processers and computer processing units
(DSP/CPU) that support speeds up to 50 Giga OPS (billion
operations per second) for signal processing. This capable
processor, combined with 2x4 MIMO antenna configurations,
enables the xMax system to use patent-pending spatial
processing software to remove unwanted interference from the
target xMax signals. Each xMax cognitive radio can
simultaneously mitigate up to 24 mobile sources of interference
or jamming. By using xMax’s multi antenna technology to
separate unwanted interference from desired xMax signals, xG
is able to offer robust and reliable links in conditions that
would cause other radio systems to completely fail
2x4 MIMO antenna
configurations.

xMax MIMO Based Interference Mitiga
tion Separates Interference from Desired
Signals
Use of X-MAX
Technology

 In Rural deployments.
 In Military applications.
 In Location-based services.
Advantages

 Quality of service (QoS) to support long ranges
mobile VoIP.
 Header compression.
 Soft hand- off mechanism.
 No spectrum license costs.
Future Scope

 The XMAX™ technology can provide fixed,
nomadic, portable solution and with OFDMA at the
heart of the technology, it can also deliver mobile
wireless broadband connectivity across vast open
and congested areas, over many kilometres.
Conclusion

 By using low power we can provide high data rate
over longer distance.
 Broad coverage is possible.
 service provided to more number of customers using
free licensed spectrum which is cost effective.
X-Max Technology

END…………………
