Professional Development Kit Series

Transcription

1 Professional Development Kit Series Specifications, Installation & Operation Doc. Rev. 2 Copyright c 2013 Range Networks, Inc. All rights reserved

2 Contents 1 Introduction Scope and Audience Disclaimers Errors and Future Changes Radio Interference Abbreviations References Contact Information Specifications Mechanical Specifications Package Dimensions Ventilation Environmental Specifications Electrical Specifications RF Specifications RF Output RF Input BTS Operation Installed Components Source Code Initial Power-Up Procedure System Access and Control Accessing the OpenBTS Console

3 CONTENTS Safe GSM Configuration Initial Testing

4 List of Figures 2.1 Professional Development Kit front panel mechanical Professional Development Kit side view mechanical

5 List of Tables 2.1 Professional Development Kit mechanical dimensions Professional Development Kit environmental specifications RF operating ranges Professional Development Kit model tyles and numbers

6 Chapter 1 Introduction 1.1 Scope and Audience This document describes the physical specifications and initial installation of the Professional Development Kit series (part number 2110-xx1-x) units. This manual does not cover full unit configuration or any significant aspects of GSM/VoIP operation. For those topics, see the OpenBTS software manual. This document is intended for use by researchers, developers, and laboratory specialists. It assumes a general familiarity with the Linux operating system and IP networking. 1.2 Disclaimers Errors and Future Changes Although the information in this manual has been carefully checked for accuracy, and is believed to be correct and current, no warranty, either express or implied, is made as to either its applicability to, or its compatibility with, specific requirements; nor does Range Networks, Inc. assume any responsibility for correctness of this information, or for damages consequent to its use. All design characteristics, specifications, tolerances, and the like are subject to change without notice Radio Interference Operation of improperly configured cellular equipment can result in interference to existing services, possibly interrupting public networks and public safety systems, even though the output power of the Professional Development Kit is relatively low. Range Networks, Inc. cannot insure that any of the procedures in this manual will not result in radio interference to other services and networks. 1.3 Abbreviations ARFCN absolute radio frequency channel number 6

7 1.4. REFERENCES 7 dbm decibel milliwatts MS mobile station (cellular phone or handset) RF radio frequency VDC Volts, direct current 1.4 References This document references the following GSM specifications, which can be downloaded for free from GSM 03.40: Digital cellular telecommunications system (Phase 2+); Technical realization of the Short Message Service (SMS) Point-to-Point (PP) GSM 04.08: Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 specification GSM 05.05: Digital cellular telecommunications system (Phase 2+); Radio transmission and reception GSM 05.08: Digital cellular telecommunications system (Phase 2+); Radio subsystem link control 1.5 Contact Information For additional information or products referenced in this manual, please contact: Range Networks, Inc. 560 Brannan Street San Francisco, California United States of America telephone support@rangenetworks.com

8 Chapter 2 Specifications The Professional Development Kit consists of: a mini-itx computer with 16GB msata flash drive, and 2GB RAM, a Range Networks RAD1 wideband or single-band digital radio, a +12V, 5A power supply with a power cord, two multi-band rubber duck antennas, two pre-programmed SIM cards, two test phones. 2.1 Mechanical Specifications The Professional Development Kit is packaged in a desktop enclosure. The Range Networks Rack Mounting Brackets (part number ) are available separately and allow you to mount your Professional Development Kit onto your existing rack (1U, 4.45 cm / 1.75 ). 8

9 2.1. MECHANICAL SPECIFICATIONS 9 Figure 2.1: Professional Development Kit front panel mechanical. Figure 2.2: Professional Development Kit side view mechanical Package Dimensions Figures 2.1 and 2.2 show front and side views with all measurements marked in inches and millimeters. The mechanical dimensions are given in Table 2.1. Range units use standard metric-sized Phillips-head (crosspoint) fasteners throughout. Table 2.1: Professional Development Kit mechanical dimensions. Dimension Value Comments width cm (12 ) height 4.45 cm (1.75 ) 1U in optional rack mounting brackets depth cm (10 ) min. front clearance 5.08 cm (2 ) min. rear clearance 5.08 cm (2 ) ventilation min. side clearance 3.81 cm (1.5 ) ventilation min. top clearance 0 cm (0 ) touching OK min. bottom clearance 0 cm (0 ) touching OK weight 1.5 kg (3.3 lbs) unit only Starting from the left and moving across, the items on the Professional Development Kit front panel are: Power switch with a LED indicator above it, KEY/SSD USB socket for reset dongle or removable media drive,

10 10 CHAPTER 2. SPECIFICATIONS ETHERNET Ethernet connector (RJ-45 socket), Rx receive-side RF connector, Tx transmit-side RF connector Ventilation Do not block the Professional Development Kit unit on the sides, as they contain the ventilation openings. The unit does not require forced air cooling. 2.2 Environmental Specifications Table 2.2 gives the environmental requirements for the Professional Development Kit series. The Professional Development Kit is designed for indoor use, either in a desktop or a rack-mounted installation. However, the unit should not require refrigeration, even in the warm climates. Table 2.2: Professional Development Kit environmental specifications. Parameter operating temperature operating humidity shock and vibration Allowed Range TBD 5% to 95%, non-condensing normal truck transport 2.3 Electrical Specifications The Professional Development Kit takes a 12V, 5A DC power supply. 2.4 RF Specifications The Professional Development Kits come in single-band and multi-band configurations. The single-band units run in one of the four standard GSM bands: GSM850, EGSM900, DCS1800, PC1900. The multi-band units can be used in any of the four standard GSM bands, selected programmatically. The latter do not include any band-specific filtering in the transmitter or receiver. The receiver frequency range is given in Table RF Output Depending on a model, the Professional Development Kit features a wideband, or a single-band Range Networks RAD1 digital radio, and has the maximum output power of 100 mw (20 dbm). The actual output level is controlled by the software.

11 2.4. RF SPECIFICATIONS 11 Table 2.3: RF operating ranges Band Receive Range Transmit Range GSM MHz MHz EGSM MHz MHz DCS MHz MHz PCS MHz MHz On any given ARFCN, the output bandwidth is khz. The spectrum mask is verified to comply with GSM Appendix A. All noise emissions in the downlink band are at least 50 db below the main signal RF Input The Professional Development Kit unit can demodulate GSM signals down to a power level of -110 dbm at the RF connector across its entire receive band.

12 12 CHAPTER 2. SPECIFICATIONS Table 2.4: Professional Development Kit model tyles and numbers Model Type Operation band Multi-band

13 Chapter 3 BTS Operation In normal operation, there are two interfaces to the Professional Development Kit: the Ethernet interface, for backhaul and administrative access, and the air interface, Um, for subscriber services. 3.1 Installed Components The Professional Development Kit comes with the following components installed and preconfigured: OpenBTS the GSM stack from layer 1 forward error correction up through layer 3, commercial release; Transceiver, sipauthserve the SIP registration proxy; SubscriberRegistry the subscriber registry database; smqueue the SMS store and forward server; Asterisk the SIP softswitch; WebUI administrative web interface. 3.2 Source Code The unit also comes equipped with the latest public release source code for the following Range Networks components: OpenBTS, smqueue, 13

14 14 CHAPTER 3. BTS OPERATION sipauthserve, and RRLP aiding server. The source code is located on the file system under /home/openbts/software/. All of the source code directories are installed as SVN working directories, linked to the official public release repository. Any of them can be updated using svn update command on the command line. 3.3 Initial Power-Up Procedure 1. Place the unit on your desk, or install in it a rack nearby (within 2-10 meters/6-30 feet). 2. Attach the provided antennas to the transceiver (Tx) and receiver (Rx). The receiving antenna must be positioned at an angle of 90 to the transmitting antenna. 3. Power up the unit. It takes up to 3 minutes to load the operating system and all the applications. 3.4 System Access and Control The Professional Development Kit runs Ubuntu Linux operating system. The primary interface to the Professional Development Kit is the UNIX shell, accessed via ssh from the Ethernet connector on the front panel. The unit s Ethernet interface is auto-sensing, requiring no hub or crossover cable. It is shipped with the default IP address of Once the unit is connected to another computer or a network on the x subnet, it can be accessed via ssh using openbts account name with password openbts. The account is sudo-enabled. The command to issue on any UNIX system, including OS X, is: ssh openbts@ From a Windows machine, an ssh client, like PuTTY, can be used. Note: Make sure to change the password for user openbts before you connect the Professional Development Kit to the public network. In order to reboot the unit, type the following command at the UNIX command line prompt: sudo reboot Following the reboot, OpenBTS and its related services will start automatically. This process takes about 3 minutes. The IP address of the unit is controlled by the Linux configuration file /etc/network/interface. The unit is preconfigured to have two IP addresses, and The address should be changed to match your local network for administrative access. In order for the new network parameters to take effect, reboot the unit. The address is defined as a virtual interface in the event something goes wrong with the network setup, and you lose access to the unit. It is highly recommended that you do not modify it.

15 3.5. ACCESSING THE OPENBTS CONSOLE Accessing the OpenBTS Console OpenBTS command line interface (CLI) is used to access (or attach to ) the running OpenBTS software. Log in to the unit via SSH as user openbts and type the following at th command line: cd ~;./CLI To exit the command line interface, type quit and hit Return. Doing so does not stop the OpenBTS software. Refer to the OpenBTS software manual for instructions on how to access and modify the OpenBTS settings and runtime information. 3.6 Safe GSM Configuration The Professional Development Kit is preset with the initial safe configuration. Before engaging up the unit, be sure that the OpenBTS configuration is compatible with the surrounding GSM networks so as to prevent disruption of service for existing cells. At a minimum, confirm appropriate values for the following parameters: GSM.Identity.MCC mobile country code. Set to 001. GSM.Identity.MNC mobile network code. Set to 01. The MCC/MNC tuple uniquely identifies a mobile phone operator/carrier. 001/01 is traditionally used for test networks. GSM.Identity.BCC base station color code. Should not match the BCC of any nearby cell. GSM.Radio.Band operating band. Should be 850, 900, 1800 or On single-band units this number must match the unit s band. GSM.Radio.C0 radio channel number. Should not conflict with any cell in the surrounding area. GSM.Radio.ARFCNs number of ARFCNs to use. Set to 1. Control.LUR.OpenRegistration Be sure this is NULL. Control.LUR.UnprovisionedRejectCause cause code to report for failed location updates. Should be set to 0x04 IMSI not in VLR. GSM.RACH.AC access classes. Should be set to 0x0400 to indicate no support for emergency calls. GSM.Radio.PowerManager.MinAttenDB minimum output attenuation. This parameter limits the maximum output power of the unit. The value is an attenuation, so the bigger it is, the less the maximum output power. For initial testing, use a value of 20. This is not necessarily a configuration that you will use for normal operation, but this set of parameters will minimize the likelihood of interference with existing services while the unit is tested and configured. See the corresponding software manual for further information.

16 16 CHAPTER 3. BTS OPERATION 3.7 Initial Testing The default Professional Development Kit configuration provides several tests that can be run independently of the network, with no backhaul: 1. location updating test, 2. mobile-originated loopback test, 3. mobile-originated call, 4. mobile-terminated delivery of SMS, with and without a parallel call, and 5. autoprovisioning of an handset via SMS. See the Test Procedures chapter in the corresponding software manual for detailed description of these test procedures.

17 Document History Date Doc. Rev. Changes 14 August initial draft 4 October working draft 28 October Initial release revision 12 November IP settings correction 17