04-12-2012, 06:14 PM
Summer Practical Training At Reliance Communications, Navi Mumbai
reliance.pdf (Size: 650.96 KB / Downloads: 50)
INTRODUCTION:
MINS is an IP based solution that shall be designed to cater to a subscriber base of around 1000 subscribers. It shall support all the features and functionalities provided by the legacy switching systems.
MINS was required as the rate of the ―Qualcomm chipset ―for the BSC (base station controller) was rising day by day. Qualcomm company is extracting 5$ per subscriber from any Indian company for using their chipset that why in MINS, BSC is constructed not using any hardware but by binding the system by some algorithms. It means that in MINS, software is prepared which can do the work of the hardware chip for BSC instead of using that Qualcomm chipset.
SCOPE OF TRAINING
The basic scope or we can say the aim of the training was putting our theories to practice. What we have learned in two years of the B.E. degree, were put to practice. Any which we
just learn as a theory subject we will forget that thing very quickly, but if we have put that thing to practice we will not forget that thing in our whole life. It is not possible for a single college to provide the practical training for all the 350 students because it is too costly to provide such machines or systems that a multinational company can provide to the trainees. I have done my summer practical training at Reliance Communication at Dhirubhai Ambani Knowledge City(DAKC), Navi Mumbai. It was a great experience to work with such great and intelligent colleagues. The whole DAKC so well designed and architect any beauty lover can’t move away from that. I think for me it was an educational tour. My training was based on MINS (Mobile integrated network system). It was a newly prepared project for wireless communication by the Reliance infocomm. MINS was a under launch product whose testing was on the way. According to the project manager of MINS it will take 2-3 yrs to launch this product.
LEARNING OBJECTIVE
It was a long term training in which were thought theory about the MINS project and we worked on the testing of MINS project. In testing we worked on the UNIX operating system. MINS project team had prepared the testing environment on the operating system UNIX. They have chosen the UNIX environment as on UNIX multithreading is possible. Multithreading is process in which multiple system can work at a time.
METHODOLGY
The project manager Mr. Praveen singhal had allotted me a computer on which we study or understand the theoretical knowledge of the MINS project using the SRS_MINS document (Software requirement document_ MINS) in our half time. After having my lunch when I came back to office then they allot me a laptop which connected to one of the subsystem of the network like BSC, BTS etc.
I have to submit a report at 6:00 p.m. every evening what we have concluded while we are testing the project.
After we put the project (MINS system) we put to a tester which they named as load test.
What we do whole day manually, is known as manual test and then when we put it to a tester is known as load test.
The flow of messages which we get in the load test can be seen in the logs of the BTS and BSC subsystem. That was work of the employees or I can say the work of my seniors or my teachers there.
When we left from there a viva voce was conducted by the project manager and we submitted the project report to them.
MS (MOBILE STATION)
The mobile station (MS) consists of the mobile equipment (the terminal) and a smart card called the Subscriber Identity Module (SIM). The SIM provides personal mobility, so that the user can have access to subscribed services irrespective of a specific terminal. By inserting the SIM card into another GSM terminal, the user is able to receive calls at that terminal, make calls from that terminal, and receive other subscribed services.
The mobile equipment is uniquely identified by the International Mobile Equipment identity (IMEI). The SIM card contains the International Mobile Subscriber Identity (IMSI) used to identify the subscriber to the system, a secret key for authentication, and other information. The IMEI and the IMSI are independent, thereby allowing personal mobility. The SIM card may be protected against unauthorized use by a password or personal identity number.
HLR (Home location register) ORIGINATION MESSAGE L3 HEADER LAC HEADER MAC HEADER ABIS HEADER
The HLR is a database used for storage and management of subscriptions. The home location register stores permanent data of the subscribers; including subscriber’s service profile, location information, and activity status.
HLR tracks and manages individual subscriber information that is needed by the network to confirm that callers are valid customers, to route calls, and to provision services. HLR is a centralized database application that provides call completion data for cellular subscribers. The HLR database contains the administrative information for each subscriber registered in the network, along with the subscriber’s current location. The HLR database is ―dipped‖ whenever the switch in the mobile network requires subscriber information to complete a call. The HLR is the location register to which a user identity is assigned for record purposes such as subscriber information (e.g. ESN, MIN, MDN, Profile Information, Current Location, and Authorization Period).