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TEMS Investigation 15.0 Release Note

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  • NT13-20774, 1.0, 5/21/2013 1

    TEMS Investigation 15.0 Release Note

    1 About This Release

    Ascom 2013. All rights reserved.

    TEMS is a trademark of Ascom. All other trademarks are the property of their respective holders.

    2 Important Information

    2.1 Rohde & Schwarz TSMW Firmware Upgrade

    All customers using Rohde & Schwarz TSMW scanners must upgrade to firmware version 1.13. This is to match ViCom software interface version 14.75, which is what is supplied with TEMS Investigation 15.0.

    Please refer to www.rohde-schwarz.com/en/firmware/tsmw for R&S firmware download and release notes describing how to upgrade the firmware.

    3 New Features

    3.1 New Features in TEMS Investigation 15.0

    3.1.1 Available Bandwidth Measurements: Blixt

    Ascom has devised a method of available bandwidth measurement (ABM) in state-of-the-art wireless networks such as LTE. The patent-pending ABM algorithm, trademarked as Blixt, helps operators track the bandwidth being offered to their subscribers with great precision and millisecond resolution. It has also been carefully designed for minimum intrusiveness, that is to say, to have the smallest possible impact on the quality-of-experience of paying network users.

    What creates the need for a novel ABM algorithm is the rapid evolution of recent mobile telecom technologies such as LTE and HSPA, with their vastly higher data rates and complex configuration options. For these technologies, traditional ABM methods are no longer adequate; what is required are metrics and measurement techniques designed specifically for the wireless environment.

    Ascoms Blixt technology for ABM is characterized by:

    High peak load low average load. Test data is sent in short, intense bursts (chirps) with much longer pauses in between. The peak load is high enough to hit the networks theoretical maximum, while the average load is kept low. This scheme allows sounding out the available bandwidth while still making minimum use of network resources.

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    Fast adaptation in time domain. The data bursts that probe the network are short enough to track changes in radio conditions on a millisecond time scale. In this way a high-resolution profile of the available bandwidth is obtained.

    Adaptation to network configuration. The amount of data sent is adjusted according to the networks maximum throughput (for example, when the UE moves between LTE and HSPA networks), while keeping the level of intrusiveness to a minimum at all times.

    Server-based design. The device that is performing ABM communicates with a server which reflects the packets back to the device, including timestamps and other data in the packets. That means it is easy to test different parts of the network by having the device access different servers. Please contact TEMS support to obtain ABM server IP addresses. A timestamping protocol called TWAMP is used.

    3.1.2 New Supplied Device: Sony Xperia V LT25i

    This is an Android smartphone operating on LTE, WCDMA, and GSM networks. Equipped with TEMS software, it offers extensive control functionality for all of these technologies, including LTE RAT lock and LTE band lock.

    The casing of the Xperia V LT25i is water-resistant, making the phone less susceptible to moisture damage in wet or damp environments.

    Frequency bands:

    LTE 2100 (Band 1), 1800 (Band 3), 850 (Band 5), 2600 (Band 7), 800 (Band 20)

    WCDMA 850 (Band V), 900 (Band VIII), 2100 (Band I)

    GSM 850, 900, 1800, 1900

    Throughput categories:

    o LTE Category 3 (100/50 Mbit/s)

    o HSDPA Category 24 (42 Mbit/s), HSUPA Category 6 (5.8 Mbit/s)

    o GPRS/EDGE Class 12

    Control capabilities:

    o RAT lock on LTE, WCDMA, GSM

    o Band lock on LTE, WCDMA, GSM

    Both RAT and band lock are real-time functions. No reboot of the phone required.

    o LTE carrier (EARFCN) lock

    o WCDMA channel (UARFCN) lock

    o WCDMA cell preferred

    o GSM cell lock/multi-lock, cell prevention

    o Voice codec control

    o Cell barred control

    o Access class control

    Google Android 4.1

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    Integrated GPS with A-GPS support

    Chipset: Qualcomm MSM9615

    CPU: Dual-core 1.4 GHz

    3.1.3 New Supplied Device: HTC One XL X325S

    This LTE/WCDMA/GSM Android smartphone is primarily intended for the CALA market (Caribbean and Latin America).

    Frequency bands:

    LTE 1800 (Band 3), 2600 (Band 7)

    WCDMA 850 (Band V), 900 (Band 8), 1900 (Band 2), 2100 (Band 1)

    GSM 850, 900, 1800, 1900

    Throughput categories:

    LTE Category 3 (100/50 Mbit/s)

    HSDPA Category 14 (21 Mbit/s), HSUPA Category 6 (5.8 Mbit/s)

    GPRS/EDGE Class 12

    Control capabilities: RAT/band lock

    Google Android 4.0

    Integrated GPS with A-GPS support

    Chipset: Qualcomm MSM8960

    CPU: Dual-core 1.5 GHz

    3.1.4 Other New Supported Devices

    Huawei E3276 (LTE Category 4 device, downlink throughput up to 150 Mbit/s)

    Samsung Galaxy S III SPH-L710

    Samsung Mpower TV SCH-S239

    Cellient MX200

    ZTE AC2738

    3.1.5 Video Streaming over HTTP

    TEMS Investigation has long supported streaming over RTP, both live and on-demand. The 15.0 release adds HTTP streaming to the repertoire, enabling testing of (for example) video upload websites. Behind the scenes, HTTP streaming relies on Internet Explorer 9 and Flash.

    Besides a host of other information elements diagnostic of streaming session performance, the viewer-perceived streaming quality is evaluated using the VQmon algorithm. Developed by Telchemy, VQmon bases its scoring on a parametric model taking IP sniffing data (among other things) as input. The algorithm is content-sensitive, which means that it allows properties of the streamed video to influence the quality scores, preventing inexpertly shot or edited footage from unduly biasing the

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    scores. For example, VQmon detects blank or frozen images as well as suspiciously blurry footage that might result from the camera not being properly controlled.

    3.1.6 RouteFinder

    RouteFinder is a stand-alone utility for searching logfiles in TRP format recorded with TEMS products. Logfiles can be searched according to a wide variety of criteria, including:

    Originating TEMS products and data-collecting devices

    Date of recording

    Location where the recording was made

    Services tested or measurements performed in the logfile

    Events and messages occurring in the logfile

    Information elements having valid values in the logfile.

    So this means you can now very easily and speedily retrieve from your storehouse of logfiles such things as: all logfiles recorded with your recently acquired Samsung S III device; all logfiles from the downtown leg of last Thursdays drive test; all logfiles where audio quality was measured; or all logfiles containing dropped calls in that rural area with known coverage issues.

    No matter what logfile data you want to lay your hands on, RouteFinder lets you sift the gold from the grit, potentially saving you massive amounts of time otherwise spent trawling manually through your collected data.

    3.1.7 RouteUtility

    This is another logfile-related utility introduced with TEMS Investigation 15.0. It enables you to split a TEMS product TRP logfile into several self-contained logfiles according to various criteria:

    Data-collecting devices used

    Date and time


    The benefit brought by RouteUtility is that it permits a more relaxed approach to logfile recording: if you wish you can simply turn recording on at the start of your drive test, then divide your data into more manageable chunks later.

    3.1.8 Voice Call Sequence: MT Voice Call Support

    Testing voice by trading calls back and forth between a mobile device and a fixed-side Call Generator is a long-standing feature of TEMS Automatic and TEMS Symphony. Such call sequences can now be set up in TEMS Investigation as well. A new scripting construct (Synchronized Call Sequence) is provided in the Service Control Designer, looping mobile-terminated and mobile-originated voice calls in alternating fashion and measuring voice quality with POLQA or PESQ.

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    3.1.9 IMAP Email Retrieval Testing

    In the Email Receive script activity, IMAP has been added as an option alongside POP3. The IMAP (Internet Message Access) protocol for email retrieval is a refinement of POP3, which it is gradually supplanting.

    3.1.10 HTTP Post

    The HTTP Post script activity offers an alternative route to testing uplink performance, with a Web server at the other end instead of an FTP server.

    3.1.11 LTE Tx Antenna Diagnostics

    A new information element indicates the difference in transmit power between the Tx antennas of an eNodeB. These measurements can be used to determine in real time if a newly deployed site has a problem with one of the Tx antennas. Compared to traditional methods of diagnosis, this feature can reduce turnaround time by several days.

    3.1.12 IPv6 Support

    TEMS Investigation 15.0 fully supports the IPv6 address space, which is now being increasingly deployed in practical use by Internet providers. This secures uninterrupted data service testing as traffic flows between the IPv6 and IPv4 domains.

    3.1.13 Usability Improvements

    Apart from the RouteFinder and RouteUtility tools, TEMS Investigation 15.0 boasts these usability-enhancing features:

    Simplified voice dial. Scripting of voice calls, both

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