RF DRIVE TEST ENGINEERING WEEK 1 DISCUSSION NOTES

Excel Technologies

RF Engineering Software testing tools

FTPXCALTEMSXCAPQXDMJDSUStreet and Trips

What is FTP?

FTP is an acronym for File Transfer Protocol. As the name suggests, FTP is used to transfer files between computers on a network. You can use FTP to exchange files between computer accounts, transfer files between an account and a desktop computer, or access online software archives.

FTP How To

Log in

Host: ftp.samsungtelecom.comTarget folder: /SJC_SPRINTuserid: samsung_ltepassword: pfe105

Locate your upload destination Drag and drop your own folder into the target folder

FTP How To - Filezilla

Uses of XCAL

• Perform drive test for service verification and gauge ‘success’ of network upgrades• Benchmark network performance• QoS measurements (Voice, Video MOS)• End-to-end application testing (MMS, SMS, video etc.)• Minimise OPEX through automating many labour-intensive work-flows• Intelligently manage massive volumes of drive test data, maps and performance countersv• Conduct indoor and outdoor network performance analyses• Capture missing neighbor list• Multiple data sessions are possible on each test terminal

Our Tool of Choice: XCAL

The XCAL series of tools are a real-time, handset-based air-interface test solution designed specifically to troubleshoot, maintain and optimize wireless voice and data network performance. XCAL delivers a highly intuitive and flexible platform to monitor network performance, assess QoS/QoE and ensure seamless service integration with existing GSM, WCDMA, HSPA, EVDO and WiMAX systems. The solution will be evolved to support LTE.

XCAL supports all major wireless standards and technologies and is available in many licensable variations: 

- GSM, GPRS, EDGE - WCDMA HSPA - CDMA 2000 1x - EVDO Rev.0, Rev.A - TD-SCDMA - DVB-H - Mobile WiMAX - LTE

Versions of XCAL

3.3.073.3.1.473.3.1.693.3.1.89 and so forth…

Further, it is continually evolved and updated to support the latest technology upgrades and client-feedback.

XCAL is being developed by ACCUVER and they continue to develop custom versions and patches to suit field requirements all the time based on requests.

RF Engineering Hardware testing tools

ScannersGPSLaptopsMobile PhonesAntennasHubs Vehicle

RF Engineering Hardware testing tools

Scanners – Wimax and RF EX WCDMA/GSM Scanning ReceiverThe high speed SeeGull EX for WCDMA/HSDPA (2100, 900, 1900, 850, AWS) MHz and GSM (1800, 900, 1900, 850) MHz networks is part of the new generation of PCTEL scanning receivers. The lightweight and compact SeeGull EX achieves significantly faster scanning speeds and greater dynamic range while providing simultaneous GSM and WCDMA/HSDPA measurements and Layer 3 decoding for both technologies.

SeeGull EX TD-SCDMA/GSM Scanning Receiver

The SeeGull EX for TD-SCDMA (2000 MHz) and GSM (1800, 900 MHz) networks is part of the new generation of PCTEL scanning receivers. This lightweight and compact EX achieves very fast scanning speeds (20ms) for measuring the top Beacon and DWPTS signals and a wide dynamic range while providing all of the measurements necessary for optimizing a TD-SCDMA network.

SeeGull EX WiMAX Scanning Receiver

The high speed SeeGull EX for WiMAX (2.5 GHz and 3.5 GHz) is part of the new generation of PCTEL scanning receivers. This lightweight and compact EX achieves very fast scanning speeds (5ms) for 5 and 10 MHZ networks and a wide dynamic range while providing all of the Preamble measurements necessary for optimizing a WiMAX network.

Fundamentals of Networking

What is a Network Protocol? A protocol is a set of rules that governs the communications

between computers on a network. These rules include guidelines that regulate the following characteristics of a network: access method, allowed physical topologies, types of cabling, and speed of data transfer.

Types of Network ProtocolsThe most common network protocols are: Ethernet Local Talk Token Ring FDDI ATM

Fundamentals of Networking

Network models

Network models

Transport Layer protocols

The User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite (the set of network protocols used for the Internet). With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network without prior communications to set up special transmission channels or data paths. The protocol was designed by David P. Reed in 1980 and formally defined in RFC 768.

UDP uses a simple transmission model with a minimum of protocol mechanism.It has no handshaking dialogues, and thus exposes any unreliability of the underlying network protocol to the user's program. As this is normally IP over unreliable media, there is no guarantee of delivery, ordering or duplicate protection. UDP provides checksums for data integrity, and port numbers for addressing different functions at the source and destination of the datagram.

Transmission Control Protocol (TCP) and OSI Models

Routing Table Basic

IP addressing Basics

IP Address structure – Octet

CDMA Technology

Short for Code-Division Multiple Access, a digital cellular technology that uses spread-spectrum techniques. Unlike competing systems, such as GSM, that use TDMA, CDMA does not assign a specific frequency to each user. Instead, every channel uses the full available spectrum. Individual conversations are encoded with a pseudo-random digital sequence. CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built.

CDMA is a military technology first used during World War II by English allies to foil German attempts at jamming transmissions. The allies decided to transmit over several frequencies, instead of one, making it difficult for the Germans to pick up the complete signal. Because Qualcomm created communications chips for CDMA technology, it was privy to the classified information. Once the information became public, Qualcomm claimed patents on the technology and became the first to commercialize it.

GSM Technology

If you are in Europe, Asia or Japan and using a mobile phone then most probably you must be using GSM technology in your mobile phone.

GSM stands for Global System for Mobile Communication and is an open, digital cellular technology used for transmitting mobile voice and data services.

The GSM emerged from the idea of cell-based mobile radio systems at Bell Laboratories in the early 1970s.

The GSM is the name of a standardization group established in 1982 to create a common European mobile telephone standard.

The GSM standard is the most widely accepted standard and is implemented globally. The GSM is a circuit-switched system that divides each 200kHz channel into eight 25kHz time-

slots. GSM operates in the 900MHz and 1.8GHz bands in Europe and the 1.9GHz and 850MHz bands in the US.

The GSM is owning a market share of more than 70 percent of the world's digital cellular subscribers.

The GSM makes use of narrowband Time Division Multiple Access (TDMA) technique for transmitting signals.

The GSM was developed using digital technology. It has an ability to carry 64 kbps to 120 Mbps of data rates.

Presently GSM support more than one billion mobile subscribers in more than 210 countries throughout of the world.

The GSM provides basic to advanced voice and data services including Roaming service. Roaming is the ability to use your GSM phone number in another GSM network.

A GSM digitizes and compresses data, then sends it down through a channel with two other streams of user data, each in its own time slot. It operates at either the 900 MHz or 1,800 MHz frequency band.

Structure of CDMA/GSM

Call Procedure in CDMA

Types of Registration

This is referred to as signaling messages in XCAL which will be the messages you will be logging for RF processing.

For example, the device must send certain registration messages to the network each time there is an activity on the device to effect necessary network response.

Questions and Comments??????