Wireless 2G Core Network

IP/TDM Network Analysis & Simulation

2G Networks - Analysis & Simulation

Analysis and simulation of GSM, or Global System for Mobile Communication, a digital cellular technology supporting Voice and SMS services.

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2G Network Analysis and Simulation Voice QoS


GSM is a globally accepted standard for digital cellular communications. GSM stands for Global System for Mobile Communication and is an open, digital cellular technology used for transmitting mobile voice and data services. A GSM network is made up of multiple functional entities and interfaces that facilitate sending and receiving of signaling and traffic messages. It is a collection of transceivers, controllers, switches, routers, and registers.
The GSM network can be divided into following broad parts.

  • The Mobile Station (MS)
  • The Base Station Subsystem (BSS)
  • The Network Switching Subsystem (NSS)
  • The Operation Support Subsystem (OSS)

The MS and the BSS communicate across the Um interface, also known as the air interface or radio link. BTS and BSC will communicate across A-bis interface, and the BSS communicates with the Network Service Switching center across the A interface.  GPRS Gb interface connecting BSS (Base Station Subsystem) and SGSN (Serving GPRS Support Node) network elements handling PS mobile traffic.

GL's 2G GSM GPRS Test Solutions

GL provides fully automated testing solutions for 2G GSM, GPRS network as discussed in greater detail below.
The representation of GSM-GPRS network above indicates the support of the interfaces by GL’s test tools. In summary,

  • End-to-end voice, and data quality testing with speech metrics such as PESQ, and POLQA. This solution combined with other metrics such as delay, packet loss, drops, and more, the true performance of 2G can be realized.
  • All elements within GSM-GPRS infrastructure can be tested with GL’s general-purpose protocol simulation tool - MAPS™, which supports simulation of various interfaces of 2G (GSM, GPRS, MAP, CAP, INAP) core network elements such as BSC, MSC, HLR, and GPRS and elements such as SGSN, and GGSN to support mobile call and traffic emulation.
  • GL’s PacketScan™ - an All-IP monitoring and analysis probe, along with NetSurveyorWeb™ allows centralized monitoring of entire GSM network. Wide range of codec support, including AMR WB, and extensive per-call reports


Signaling and Traffic Simulation over GSM GPRS

GSM GPRS Communication Network

GL offers an end-to-end 2G GSM GPRS Communications Network Lab (CNL) with all components within the wireless infrastructure to simulate both GERAN, and GSM Core, allowing complete testing of the GSM network. With these, one can simulate Voice, SMS calls in a lab environment, and study the network behaviour.

GL’s MAPS™ HD is a High Density 1U network appliance that is capable of high call intensity and high volume of sustained calls for a vast array of communication protocols covering IP and Wireless networks.

Signaling and Traffic Simulation over 2G Network

Mobile Traffic Simulation -GPRS Gb:

  • Generate and verify user mobile data (Email, Web-HTTP, and FTP), gateway traffic, and packet traffic over (GTPv1 and GTPv2) GPRS Gb network interface

Location Services:

  • Location services simulation over BSC <-> SMLC Lb interface
  • BSSAP LCS Extension (BSSAP-LE) message exchange over M3UA/SCTP and SCCP
  • Ready scripts for BSSAP-LE procedures – Location Service Request, Location Information Transfer, TA (Timing Advance) Positioning

RTP Traffic Simulation:

  • Create, manage RTP sessions and generate and receive RTP traffic over the sessions with complete automation capability
  • Simulation of RTP Traffic such as Voice, Digits, Tones, IVR and Impairments
  • Automate the IVR testing process (call establishment and traffic generation / detection) process through scripts
  • Supports all standard Voice Codecs.

SMS Traffic Simulation

  • Ability to push / pull Short Messages over the network as if sent by thousands of mobile phones (Short Message Mobile Originated (SMS-MO)). MAPS™ can also transmit a Short Message to a mobile phone (Short Message Mobile Terminated (SMS-MT)).

TDM Traffic Simulation

  • Simulation of TDM Traffic such as digits, voice file, single tone, dual tones, Dynamic VF
  • Simulation of TDM Fax Traffic
  • TRAU GSM traffic over GSM Abis interface
  • Create, monitor, and terminate TRAU GSM traffic sessions


Supported Protocols Standard / Specification Used


3GPP TS 48.071


3GPP TS 49.031


3GPP TS 08.08 V8.9.0, 3GPP TS 48.008 V10.0.0 (2011-01)


3GPP TS 04.08 V7.17.0


3GPP TS 04.18 V8.13.0


3GPP TS 03.40 V7.5.0 &
3GPP TS 04.11 V7.1.0 GSM 03.38 version 7.2.0 Release 1998


3GPP TS 08.18 V8.10.0 (2002-05)


3GPP TS 04.64 V8.7.0 (2001-12)

NS (Network Service)

GSM 8.16 (ETSI TS 101 299 V8.0.0)


3GPP 24.008

SMG (GPRS Session Mgmt)

3GPP TS 24.008 V5.16.0 (2006-06) (Release 5)


3GPP TS 04.64 V8.7.0 (2001-12)


RFC 793


RFC 3332


Q.703, ITU-T Blue Book


Q.713, CCITT (ITU-T) Blue Book


RFC 4960

Use Cases

Wraparound BSC Testing

Wraparound BSC Testing

MSC Testing

MSC Testing

Wrap around MSC Testing

Wrap around MSC Testing

Multi Interface MSC Simulation

Multi Interface MSC Simulation

Wrap around SMSC Testing

Wrap around SMSC Testing

SGSN Testing

SGSN Testing

Monitoring GSM GPRS Networks

PacketScan™ GSM an All-IP Network Monitoring software and Hardware based T1 E1 GSM Protocol Analyzer offers powerful features to capture and monitor live signaling and traffic over IP and TDM networks respectively.

PacketScan™ HD is a high density multi-protocol VoIP monitoring, reporting and diagnostic network monitoring appliance. It can capture and process high volumes of communication protocols over IP and Wireless at 1GigE (PKV120) and 10GigE (PKV122) data rates.


GL’s IP/TDM Protocol Analyzer probes can be deployed along with a centralized monitoring system NetSurveyorWeb™ (PKV170). Protocol Analyzers can send Summary Fields, Frame Octets, and Call Detail Records to database along with Traffic Summary for the captured calls. The NetSurveyorWeb™ Lite (PKV169) is an integrated and a cost-effective web-based monitoring system that works with IP/TDM Protocol Analyzer probes as an addon tool.

KPI and Reports

  • Mapped Vs UnMapped
  • SMS
  • Top 5 SMS
  • Total CDRs on different links
  • Total SMS on different links


  • Call Type (Location Update, Speech Call, SMS, IMSI Detach etc.)
  • Failed call types
  • Call Duration
  • Successful vs Failure Calls
  • Most Common Failures
  • Billing Duration
  • Total Billing Duration
  • Average Billing Duration in Sec


  • Call Duration


Visit PacketScan™ for Wireless Networks or GSM Analyzer webpage for more details. For centralized web-based monitoring GSM Network, visit NetSurveyorWeb™ page.

End-to-End Voice QoS

Measure Voice Quality on GSM, GPRS Networks

Using GL’s VQuad™ with the Dual UTA HD, or all-in-one VQuad™ Probe, along with centralized analytical tools, voice, data, as well as video quality can be tested simultaneously on a wireless or wired network.

Since the GL’s VQuad™ solution is network independent, all Voice and Data networks are supported including 2G, 3G, WiMax, 4G LTE, Advanced LTE and the 5G.

GL’s VQuad™ NetTestsolution provides automated data testing on Mobile Devices (Android and Apple) as well as PC based internet connections. The Data Testing includes TCP, UDP, HTTP, FTP, DNS, VoIP, SMS, and Email tests. GL’s Voice Quality Testing (VQT) supports automated voice quality between any two nodes within the network using latest ITU based algorithms including Perceptual Objective Listening Quality - POLQA (ITU-P.863) and PESQ (ITU-P.862).

VQuad™ Automated Wireless Testing
  • Complete end to end voice, data, video quality testing of GSM network-visit Automated Network Wide Testing
  • Automated test statistics and results across next generation GSM network can be accessed via web interface
  • Connect to Mobile Phones, Smart Phones, and Broadband Devices using GL’s portable VQuad™ - Dual UTA HD system
  • Use GL’s VQuad™ - Dual UTA HD to confirm quality of service during the network upgrade process
  • VQuad™ can remotely perform Automated Data Testing on any Android or iOS mobile devices (running the GL NetTest app), irrespective of where the phone is located, and whether the phone is on a voice call or not.
  • Perform automated data testing on PC-based Broadband Internet (Broadband 3G/4G/LTE/5G, WiFi, Wired) and on Apple/Android Mobile Devices – tests include TCP, UDP, HTTP, VoIP, FTP, DNS, SMS, UEInfo, SimInfo, and PhoneInfo
  • Supported devices - Mobile Radio (PTT) & Mobile Phones (5G, 4G, 3G, Wi-Fi, WiMax)
  • Supports both Narrowband (8k sampling rate) as well as Wideband (16k sampling rate) connections for use in VoLTE networks utilizing the AMR-WB codec

Visit Complete Voice and Data Quality webpage for more details.


 Item Description


GSM Protocol Simulation







MAPS GSM Abis IP Emulator

MAPS™ GSM A IP Emulator

 MAPS™ BICC IP Emulator

MAPS™ CAP Emulator

MAPS™ INAP Emulator

MAPS™ Gb Emulator over IP for BSC & SGSN


MAPS™ MAP over TDM Emulator


GSM Protocol Analyzers


GSM over TDM Protocol Analyzer


Offline T1 or E1 GSM Protocol Analyzer


GSM Motorola Mobis option


Enhanced T1 / E1 Call Capture/Analysis Software


PacketScan™ - (Online and Offline)


GSM over IP Protocol Analyzer


TRAU Protocol Analyzer


SIGTRAN (Optional with PacketScan™)
Offline SIGTRAN Analyzer (Optional with PacketScan™)


PacketScan™ HD w/4 x 1GigE


PacketScan™ HD w/2 x 10GigE


PacketScan™ HD w/40/100 GigE


PacketScan™ HD w/40/100 GigE - Portable


Web Based Monitoring Applications


NetsurveyorWeb™ (Perpetual License, Unlimited Users/Nodes)
- Includes Oracle 11g Standard Edition One and Standard Server-Grade Computing Platform


NetsurveyorWeb™ Lite
- Probe Level WebServer, PacketScan™, and Oracle 11g Express Edition;