Tems Investigation : Fundamentals

1.1.	Fundamentals of TEMS Investigation 8.0

TEMS Investigation 8.0 is an air interface test tool for UMTS and CDMA cellular networks, supporting all of

•	GSM/GPRS/EGPRS

•	WCDMA/HSDPA/HSUPA

•	cdmaOne/cdma2000/1xEV-DO.

TEMS Investigation enables monitoring of voice (and, in UMTS, video) telephony as well as a variety of data services over packet-switched and circuit-switched connections.

1.1.1.

Modules: Data Collection and Route Analysis

TEMS Investigation combines data collection, realtime analysis and post-processing – all in one product. It is divided into two modules, Data Collection and Route Analysis:

Data Collection is the part of TEMS Investigation that interfaces with phones and other measurement devices, collects data, and records it in logfiles. It also allows presentation and analysis of a single logfile at a time. To customers familiar with TEMS, the Data Collection module can be described as essentially encompassing the functionality of the older technology-specific products TEMS Investigation GSM, TEMS Investigation WCDMA, and TEMS Investigation HSDPA. This version also includes major functionality found in TEMS Investigation CDMA 4.0.

Route Analysis is a module that permits rapid analysis of multiple logfiles, originating from TEMS Investigation itself or from TEMS Automatic, TEMS DriveTester, or TEMS Pocket. Statistical binning of logfile data by area, time, or distance is supported.

The means of presentation – maps, line charts, and so on – are fundamentally the same in both modules.

Route Analysis also includes RAN Tuning, a reporting tool for UMTS data (packet-switched and circuit-switched). RAN Tuning evaluates the network in terms of accessibility, mobility, coverage, and retainability. The output ranges from management reports to detailed diagnostics.

1.1.2.

Package Options – Licensing

The data collection functionality is optional. Customers who dispense with TEMS Investigation supported data collection are still able to use the non-realtime functions of the Data Collection application (single-logfile replay, logfile export, etc.). The Route Analysis component is always in the package.

Cellular technologies (GSM, WCDMA, CDMA) can be freely selected and combined, except that WCDMA always comes with GSM support included.

The Base Package provides the ability to collect data with Sony Ericsson phones in UMTS networks and with Qualcomm chipset based terminals in CDMA networks. Other phones are licensed separately for each supplier or, in the case of Qualcomm, for each chipset.

The Base Package permits data collection with one phone at a time. A separate license option is available for collecting data with multiple phones concurrently.

Audio quality measurement (AQM), including PESQ, is likewise sold as a separate option. This option includes all required hardware as well as the ability to connect that hardware to TEMS Investigation.

1.1.3.

Connectable Equipment

TEMS Investigation 8.0 supports a wide variety of user terminals, including ones from Sony Ericsson, LG, Motorola, Nokia, Qualcomm, and Samsung. They allow extensive monitoring of both UMTS and CDMA networks and of GSM–UTRAN as well as cdmaOne–cdma2000–1xEV-DO interaction.

For WCDMA scanning, the application supports the PCTel SeeGull LX, Rohde & Schwarz TSMU, and Anritsu ML8720/8740/8741 scanners, all capable of scanning multiple frequencies simultaneously. For GSM scanning, Sony Ericsson GSM phones as well as PCTel scanners can be used.

For CDMA scanning, PCTel SeeGull CDMA scanners are supported.

GPS units can be connected for geographical positioning. Manual positioning (“pinpointing”) is supported, with indoor measurements in mind.

The number of external devices that can be connected simultaneously in the application is dependent on many factors, such as whether a data service is being run. See the Release Note for further information.

1.2.	What’s New in TEMS Investigation 8.0

The most important new features in this release are:

•	CDMA support

•	Audio quality measurement with PESQ

•	HSUPA support

1.2.1.

CDMA Support

This release of TEMS Investigation integrates CDMA support into what has previously been a UMTS-specific product. The cdmaOne, cdma2000, and EV-DO functionality is broadly similar to what has hitherto been found in the separate product TEMS Investigation CDMA but also introduces important new features:

•	Wide range of radio and network measurements supported, similar to TEMS Investigation CDMA 4.0. This version adds support for EV-DO Rev A.

•	Data collection with terminals based on Qualcomm chipsets MSM5100 (cdma2000), MSM6500 (EV-DO Rev 0), and MSM6800 (EV-DO Rev A).

•	Scanning with PCTel SeeGull LX: pilot scan (all pilots/selected pilots/Top N) on one or several frequencies in cdma2000, EV-DO, and cdmaOne networks (IS-2000, IS-856, and IS-95). The scanner has a built-in GPS.

1.2.2.

Audio Quality Measurement (AQM) with PESQ

PESQ, short for Perceptual Evaluation of Speech Quality, is the industry standard for speech quality measurement and a tried and tested tool in TEMS Automatic. The PESQ algorithm measures end-to-end speech quality by comparing one party's undistorted input signal (serving as reference) with the degraded version of the same signal received by the other party. The severity of the degradation as perceived by human listeners is assessed using highly refined models of the human ear and the brain's processing of auditory input.

The PESQ algorithm is defined by the ITU standard P.862. For in-depth information about PESQ, see also www.pesq.org.

Other audio quality measurements performed by TEMS Investigation include echo delay, echo attenuation, volume, and silent call detection.

1.2.3.

HSUPA Support

Simply put, HSUPA (High Speed Uplink Packet Access) brings the same refinements to the UTRAN uplink as HSDPA brought to its downlink. That is, the purpose of HSUPA is to increase the maximum user throughput, to decrease the user delay, and to increase the system capacity. HSUPA is also known as Enhanced Uplink, EUL.

TEMS Investigation introduces a set of new information elements for diagnosing HSUPA performance (beyond basic throughput values, which are of course also obtained). These include Average Serving Grant, Average E-TFCI, DTX Rate, and UE Happy Rate. Besides the information elements, HSUPA mode reports are presented in the Mode Reports message window.

1.2.4.

Support for New Terminals

•

UMTS:

–	Sony Ericsson K790a, K790i: GSM phones, both with EDGE support (EDGE capability can be turned off)

–	Sony Ericsson K800i: UMTS phone with new UMTS control functionality (WCDMA cell selection control; BLER target override)

–	Motorola Razr V3xx: UMTS phone supporting Band I (Europe/Japan/Asia Pacific 2100 MHz) with HSDPA capability enabling data transmission up to 3.6 Mbit/s

–	Qualcomm MSM7200 chipset based terminals: WCDMA Band I, II, V (2100/1900/850 MHz), HSUPA up to 5.76 Mbit/s, HSDPA up to 7.2 Mbit/s

•	CDMA: See list of supported Qualcomm chipsets above. Suppliers of terminals based on these chipsets include Kyocera, LG, Motorola, Option GT, Samsung, and Sierra Wireless. EV-DO capability is provided by MSM6500 chipset (Rev 0) and MSM6800 chipset (Rev A) terminals.

1.2.5.

Video Telephony Quality Index (VTQI)

This is an Ericsson proprietary algorithm for judging the quality of video calls. It is a no-reference method based primarily on BLER and on information about the codec and bit rate used to encode the video and audio signals. See chapter 26.

1.2.6.

Video Streaming Enhancements

Video streaming testing has been extended to support live streaming, that is, reception of live broadcasts and repeating playlists sent out from streaming servers.

Received streamed content can be saved to AVI files.

1.2.7.

Improved Automatic Detection of External Equipment

The autodetect function has been redesigned and greatly improved, so that all state-of-the-art user terminals, scanners, and GPS units are automatically detected and enabled by the application as soon as they are plugged into the PC.

1.2.8.

Discarding of Layer 3 Messages

In the new Sony Ericsson phones (see section 1.2.4 above), the user can opt to discard selected types of Layer 3 messages.

1.2.9.

Route Analysis: New Tasks

The Route Analysis application has been augmented with two new tasks, both using the Map window:

•	a benchmarking task, ideal for comparing PESQ and other quality measures between operators

•	a filtering task for GSM, where the displaying of route markers is restricted to user-selected values of ARFCN and BSIC.

1.2.11.

MDM Support

TEMS Investigation logfiles can be exported in MDM format.

1.2.12.

Missing Neighbor Events Based on Phone Data (GSM/WCDMA)

Two new Missing Neighbor events have been introduced which are triggered by data from phones, thus providing a reliable indication of missing neighbors. The new events supplement the pre-existing one (for WCDMA) which is based on scan data only.

1.2.13.

Licensing

Inserting the hardware key is now required also for the Data Collection application. Without the hardware key the application cannot be launched.

Two new license options are introduced, one for AQM and one for connection of multiple user terminals. Without the latter, only one user terminal can be connected in TEMS Investigation.

2.	Quick Guide to the User Interface

This section gives a quick overview of the TEMS Investigation Data Collection user interface. The user interface is described in more detail in next chapter

Workspace and Worksheets

The entity that stores all the windows and settings used in a working session is called the workspace. Only one workspace can be open at a time.

To manage your windows more smoothly, you can divide your workspace into several worksheets. Up to ten worksheets can be active simultaneously.

Toolbars

Through the toolbars all the central functions are accessible. Most of the toolbar buttons are mirrored in the menus.

Navigator

From the Navigator, you can open presentation windows, change the color ranges of information elements, and manage your worksheets.

The Navigator is especially useful for configuring the workspace at the beginning of a session.

Menu Bar

The menus mirror most of the toolbars as well as the Navigator’s Menu and Worksheets tabs.

Status Bar

The Status bar displays symbols and short messages that indicate the current status of the application.

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