1. SUBMITTED BY- NAME-DEEPANJAN MANDAL; CLASS ROLL NO-38; UNIVERSITY ROLL NO-10900111038; SECTION-A;DEPARTMENT-C.S.E

2.   Current situation.  What is X-max Technology?  X-max Technologies Network Architecture.  How it works?  Conclusion. CONTENTS

3.   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. Current situation

4.   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. Cognitive radio

5.   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-to- end Internet Protocol (IP) system architecture.  The company deployed a 30-square-mile (78 km 2 ) xMax network in the Fort Lauderdale, Florida area What is XG ?

6.   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 technology

7.  xMAX cellular network

8.  . The following are the major components of the system:  xMod  xAp  xMSC  x Monitor/x Drive xMAX cellular architecture

9.   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). Xmod

10.   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. Xap

11.   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. Xmsc

12.  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. x Monitor/x Drive

13.   WORKING OF XMAX TECHNOLOGY-  ADVANCED COGNITIVE SENSING.  MITIGATING INTERFERENCE.  ADVANCED ANTENNA. Working of x-Max Technology

14.   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. Advanced Cognitive Sensing

15.   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. Mitigating Interference

16.   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. Dynamic Spectrum Access (DSA)

17.   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.

18.  xMax MIMO Based Interference Mitiga tion Separates Interference from Desired Signals

19.   In Rural deployments.  In Military applications.  In Location-based services. Use of X-MAX Technology

20.   Quality of service (QoS) to support long ranges mobile VoIP.  Header compression.  Soft hand- off mechanism.  No spectrum license costs. Advantages

21.   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. Future Scope

22.   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. Conclusion

23.  END………………… X-Max Technology

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