Development Environments

UNIX (Solaris), WINDOWS 95/98/NT

Programming Languages

C, C++, SIB based programming, TNSDL

Protocols

SS7, MAP, NAS – Non Access Stratum (EMM, ESM, GMM, SM, CC, MM), RANAP, SMPP, CAMEL, INAP, GTP, DIAMETER, AS – Access Stratum (RRC), PCAP, SIP.

Test Tools

Tektronix K1257 Protocol Analyzer, Net Hawk GSM Analyzer and Net Hawk MSC Simulator, INET, Emulator SSP, R-TEST, Auto Service, PackETH.

Automation Test Tools

Net Hawk EAST, TTCN-3

Title

Radio Resource Management on Femto Cell Base Station Router.

Client

Role

Alcatel-Lucent

Senior Technical Leader

Team Size

36

Synopsis

Femto BSR implementation will be realized by collapsing the Node B & RNC functionality and supporting IuPS & IuCS interfaces to the traditional UMTS CN. This will provide the end user with low cost UMTS coverage within the home and/or office, helping to facilitate seamless roaming between the Home/Enterprise and Macro network.

Features Working/Worked:

·               Support for IuPC interface

·               AMR-WB Voice call support on Femto

·               LTE to 3G CS+PS Hand In (SRVCC+PS)

·               KPI Enhancements

Responsibilities

Responsible for designing, development of new features and bug fixing of ALU small cell product.

Title

Ulticom SS7 stacks.

Client

Role

Mitel

Senior Technical Leader

Team Size

7

Synopsis

Ulticom has set of products known as Signalware AR (Application Ready), Signalware NR (Network Router) & D7G (Diameter-SS7 Gateway). Applications like MAP, CAP, and ISUP are built on top these SS7 stacks by each network equipment vendor. This will provide the opportunity to network equipment vendors to build their applications with less time so that they can reach market easily.

Responsibilities

Responsible for estimation, development of new features and bug fixing of Ulticom SWNR, SWAR & D7G products.

Title

Mobility Management Entity.

Role

Principal Engineer

Team Size

3

Languages

C

Synopsis

Mobility Management Entity (MME) is critical to the network function of the 4G mobile core network, known as Evolved Packet Core (EPC). The MME resides in EPC Control Plane and manages session states, authentication, paging, mobility with 3GPP, 2G and 3G nodes, roaming and other bearer management functions.

·               The primary features of MME are:

·               Integration of multiple core networks functions in a single node.

·               High transaction rates for attaches, activations, TAUs, handoffs and paging.

·               Congestion Management, Load Sharing and MME pooling.

·               CS Fall Back for Voice Traffic.

·               High Availability helps to ensure subscriber satisfaction and 99.999 percent system availability.

Responsibilities

Handled Design and Development of new features on MME                                                         

Protocols

NAS – EMM, ESM

Title

Client

Mobile Internet Offload Gateway for 3G.

Nokia Siemens Networks

Role

Module Leader

Team Size

7

Languages

C

Synopsis

Broadband wireless networks are approaching saturation due to an explosion of traffic spurred by smart phones and wireless dongles. If not addressed, congestion leads to poor quality of experience and ultimately customer churn. However, adding capacity to the wireless core network is a significant investment and thus operators are looking at novel approaches to deliver more capacity more cost effectively. Appropriate solutions can empower network equipment providers to incorporate Internet Offload / Traffic Offload Gateway functionality to provide congestion relief for the wireless core network. By identifying and routing certain classes of traffic directly to the Internet rather than via the wireless core network, operators can increase customer satisfaction and delay costly core capacity upgrades. An Internet Offload / Traffic Offload Gateway are flexible in its deployment options and are applicable to both LTE and 3G wireless networks.

Responsibilities

Managed Design and Development using NAS (GMM, SM) and GTP Protocols.                                                         

Title

Client

Release – 8 features development on NSN – S4-SGSN product.

Nokia Siemens Networks

Role

Module Leader

Team Size

9

Languages

C

Synopsis

Features Worked On:

·               BEARER ACTIVATION on S4 Interface.

·               Database implementation to support BEARER ACTIVATION feature.

·               Tracking Area Update.

The NSN-S4SGSN connects the both traditional 3GPP access networks, GERAN (in A/Gb mode) and UTRAN, to the packet switched domain. The NSN-S4SGSN performs control plane functions such as managing subscriber’s mobility in the access network provides session management functionality for Rel-8 subscribers such that they can have Packet Switched Signaling between Rel-8 UEs and SGW/PGW when they come across in a traditional 3GPP access networks like GERAN/UTRAN.

Responsibilities

Design and Development of new features using NAS (GMM, SM) and GTP Protocols.                                                         

Title

Client

BSS WIN Feature Development for Huawei Technologies, Bangalore.

Huawei Technologies

Role

Developer

Team Size

7

Synopsis

Features Developed at Huawei Technologies:

·               Discount based on Accumulative Call Duration.

·               SMS Notification after successful Recharge

·               Special Charge Rule based on Accumulative Recharge Amount.

Huawei offers End-to-End BSS (Business Support Systems) solution and professional services that help carriers meet rapidly evolving market needs while managing and reducing the operational costs. Huawei BSS is composed of a series of sub-solutions, products and components including Online Charging System (OCS), Convergent Billing Solutions (CBS) and Business Intelligence (BI) etc. It can support all services such as voice, message, data, video and other applications of PSTN, NGN, 2G/2.5G/3G, IMS and WiMAX networks.  

Special Charge Rule based on Accumulative Recharge Amount Feature will provide the preferential rates for a prepaid mobile subscriber who has subscribed for this feature based on the accumulative recharge amount. If a subscriber reaches certain threshold of accumulative recharge amount, then the subscriber is eligible for Special Charge Rule Feature which provides preferential rates for making calls and sending SMS.

Responsibilities

Accountable for coding and bug fixing according to CAMEL / INAP Protocols.

Title

Real Time Roaming Data-Capture Product.

Role

Developer

Team Size

5

Synopsis

Roamware’s RTRDC (Real-Time Roamer Data Capture) solution is targeted to help Wireless Service Providers (WSP) in achieving their goal of reduction in revenue loss due to roaming frauds and complying with GSMA’s directive to implement NRTRDE solution by October 1, 2008.

In the initial release, RTRDC is aimed to be a solution for being compliant to NRTRDE directive of GSMA for in-roamer only. In future releases, depending on market requirements, RTRDC product can be enhanced to support a solution for out-roamers too.

Responsibilities

Coding and bug fixing according to CAMEL / INAP Protocols.

Module

Client

WGK for NOKIA GIO System

Nokia Siemens Networks

Role

Developer

Languages

C

Team Size

6

Synopsis

The Wireless Gate Keeper (WGK) in Nokia GIO system is equivalent to the MSC (Mobile Switching Centre) in the ordinary GSM network, although it also handles some of the BSC’s functions. The main task of the WGK in Nokia GIO is to provide call control services to Nokia GIO endpoints (IMC and AGWs). The basic functions of the WGK can be divided into five different types. They are

·               Device Management

·               Call Management

·               Mobility Management

·               Billing and Statistics

·               Directory Services.

Call Management is defined as a set of functions that enable and control telecommunications between two or more parties. Call Management includes Call Signaling and Call Type Management functions.

Responsibilities

Responsible for Coding/ Bug fixing and testing according to NAS - Call Control (3GPP TS 24.008) Protocol.

Module

Client

Message Register for Motorola (SMSC)

Motorola

Role

Product Tester

Team Size

8

Synopsis

Motorola’s robust, integrated messaging solutions support the full spectrum of access technologies, including CDMA, TDMA, GSM and GPRS. The Motorola Message Register platform has been designed to provide a continuous path from SMS to more sophisticated forms of messaging, including Enhanced Messaging Service (EMS) and Multimedia Messaging Services (MMS). The powerful Motorola SMSC enables you to deliver a wide variety of advanced revenue generating messaging services like short messaging, enhanced messaging, digital paging, voice mail and fax notifications. The Motorola Message Register has key features like

·   Scalable to 16 processors and Guaranteed Message Delivery.

·   IP Interface support of SMPP, CDMP, SMTP.

·   Subscriber and Group Provisioning.

Responsibilities

Preparing the test plan, test cases, test execution and bug reporting of new features.

Module

Mobility Manager

Role

Developer

Languages

C++

Team Size

1

Synopsis

2G/3G roaming control enhancements is a new requirement for 3G MSC to control whether the whole 2G subscribers (not individual 2G subscribers) are allowed to roam into 3G networks or not when 2G/3G network has the same PLMNIID. So a system level feature flag is needed in 3G MSC to indicate whether all 2G subscribers are allowed to roam into the 3G network or not. When a 2G subscriber accesses the 3G networks via UTRAN, 3G MSC gets triplets from HLR. According to the UTRAN access and triplets got from HLR, we know that 2G subscriber roams into 3G network and our 3G MSC will based on the system flag to decide to reject the 2G subscribers or not. If the flag is switched on, 2G users can’t roam into 3G networks. If the flag is switched off (default value), 2G users can roam into 3G networks. 2G networks imply the network with an MSC that supports the GSM radio access technology. The 3G networks imply network with an MSC that supports UTRAN and GERAN Access networks and 2G/3G network supports all three.

Responsibilities

Coding/Bug fixing and testing of 2G/3G Roaming Control Enhancements feature according to NAS (MM) 3GPP TS 24.008 Protocol.

Module

VoIP trial with TAO-Orange, Thailand.

Role

Tester

Team Size

2

Synopsis

Worked onsite at TAO-Orange, Thailand for validation of VoIP. I was involved with the customer setting up VoIP backbone connectivity. I was able to place normal end-to-end calls for both Mobile-Mobile and Mobile-PSTN. I also did Load/Sharing and redundancy tests of MGW and Call Server using VoIP.

Responsibilities

Complete configuration of VoIP and Normal end to end call test with the customer.

Module

Home Location Register Module for UMTS

Role

Developer

Languages

C++

Team Size

3

Synopsis

Home Location Register is a database, which is used to store permanent and semi-permanent data such as information regarding subscriber profile, authentication data and node information etc. HLR will always know in which location area the MS is (assuming that the MS is in coverage area), and this data is used to locate an MS in the event of MS terminating call set-up. HLR will be built on the existing MSC hardware and third party stack (SS7 & MAP) along with some service logics will be ported on it. Here database will be Times Ten. It addresses strategies being adopted for Fault Tolerance, High Availability, & Scalability of the system.

Responsibilities

Coding, Bug fixing and testing according to the MAP (3GPP TS 29.002) Protocol