Our client is one of the leading European telecom vendors and one of the largest suppliers of mobile systems the world over. Over 40 per cent of the calls worldwide are routed through their networks

To take advantage of emerging market dynamics, our client needed to roll out their CDMA2000 network infrastructure through simple and cost-effective solutions. A typical CDMA2000 radio access network consists of hundreds of Base Stations (BS) and a number of Base Station Controllers (BSCs) besides other network elements and systems.

The BSC which is expected to handle thousands of simultaneous calls and call attempts, needs to be tested thoroughly from both a functional as well as load-testing aspect. The deployment of a robust and faultless system required testing the BSC extensively in a laboratory environment. Physically duplicating a real-world scenario in a lab, however, would be extremely expensive and tedious.

An off-the-shelf simulator testing tool based on the target platform (BSC) was non existent .

Wipro developed an MS-BS simulator, a highly flexible and scalable tool that simulates a large number of MS and BS calls and works as if the BSC is handling real phones and base stations. The simulator could handle 24 calls per second as compared to the legacy tool’s capacity of one call per second.

This simulator required for testing all the features of the BSC had to be on the same platform as the BSC. The situation was made more challenging as the platform was still in the process of evolving. Additionally, the simulator had to conform to the BTS-BSC interface specifications, which were changing to suit customer needs

The Simulator was delivered in incremental releases matching the BSC release under development. Since the BSC-BTS interface was undergoing changes, the Wipro team worked closely with the client team to adapt any changes to the simulator, without significantly impacting the schedule.

The performance-testing delivered by the tool includes scenario of BSC dealing with high loads from a high concentration area, for instance, thousands of users making calls from a football stadium.

	Supports different types of calls like Voice, Markov, Packet data etc., various registrations and handoffs
	User friendly interface for configuration of Mobile station and base station parameters, load related parameters such as Busy Hour Call Attempts (BHCA) and call duration
	Uses a highly flexible state machine approach which allows users to define and modify calls
	Supports SMS-testing over common and dedicated channels
	Uses the same physical interface used by a real base station to connect to BSC
	Strong enough to undertake the peak hour traffic, 24 calls/second