Keyboard Music

This program allows you to use your computer keyboard to play musical instruments. It's so easy to use that everybody can play the instrument he or she likes. Keyboard Music is the easiest musical instrument in the world designed for you and your kids! You and your kids can play the piano, violin, guitar, saxophone and more than 100 kinds of musical instruments with it!

Fruity Loops 8

This is the most flexible music instrument tool that gives you real playing experience. This tool has ultimate variety of instruments at its disposal. You can set minute details of the instruments which you can do it in real time instruments. The keyboard, electric guitar, pads, etc are of great resemblance to the original instruments. You can actually integrate the sounds from all those instruments so that you can get a sort of medley from it. I use it for time pass but most of them are professionals who have strong inclination towards music
.

Classification of Schedulers

The basic model of packet scheduler will have output buffer, multiple flows (sessions) connected to it. There will be a single server to serve the queue. The service discipline can be anyone of the technique that was mentioned above. The general classification of the schedulers includes two types namely work conserving and non-work conserving

Requirements for a scheduling algorithm

There are different packet scheduling algorithms for wireless networks which tries to ensure fairness and QoS. A scheduling algorithm must satisfy the following requirements. It should be easier to implement and the order of complexity should be o (1) not o (N). Performance bounds should be deterministic or statistical. Other parameters like Bandwidth, delay, jitter and loss should be easy to monitor and all these values should be close to optimum values. Fairness and protection should be ensured to each and every flow that is associated with a link. In our project we are considering three such algorithms and compare their performance based on the throughput and bandwidth analysis. The algorithms are Weighted Round Robin, Deficit Round Robin and Opportunity based Deficit Round Robin.

Introduction

There is a huge increase in the number of wireless networks and all of them demand a high bandwidth and QoS specifications. In the wired network, these things are taken care by admission control and several other policies. But in wireless environment this is becoming more and more difficult. To know these things better, we must be familiar with some key terms.

—Weighted round robin algorithm visits each queue and sends a number of packets depending on the weight allotted to the queue.

—DRR algorithm does use the Deficit counter value for transmitting the packets but it updates the DC value just by subtracting the size of the packet directly.

— By using the penalty factor, we are actually penalizing the flows that are not utilizing the network resources in a proper way

Mobile Switching center:

A basic cellular system has several mobile stations, base stations and mobile switching centers. The mobile switching center is sometimes called as mobile telephone switching office, since it is responsible for connecting all the mobile phones to the PSTN in a cellular system. Each mobile communicates with the help of a radio with one of the base stations and may be handed off to any number of base stations throughout the duration of a call. The mobile station contains a transceiver, an antenna, and control circuitry, and may be mounted on a vehicle or used as a portable hand held unit. The base station consists of several transmitters and receivers which simultaneously handle full duplex communications and generally have towers which support several transmitting and receiving antennas. The base station serves as a bridge between all the mobile users in the cell and connects the simultaneous mobile calls via telephone lines or microwave links to MSC. The MSC coordinates the activities of all the base stations and connects the entire cellular system to PSTN.

cellular telephone system

A cellular telephone system can provide connection to the PSTN for any user location within the radio range of the system. Cellular systems accommodate large number of users over a large geographic area, within a limited frequency spectrum. Cellular radio systems provide high quality service that is often comparable to the landline service. High capacity is achieved by limiting the coverage of each base station transmitter to a small geographic location called cell so that the same radio frequency can be reused by another base station located at some other distance. A sophisticated switching technique called hand off enables a call to proceed uninterrupted when the user from one cell to another.