Friday, April 4, 2014

Slotted ALOHA (a toss heads or tails to decide who is sent) method when a collision occurs every no


After we have studied computer networking and then some of us would be familiar with the protocol, and that protocol is meant to define procedures and methods to be used for communication between the node that are in the network. computers (see also internet protocol) room cooler price in delhi internet protocol layer in each layer, each with its own specific protocol. For the communication between the protocol layer in the article, we will learn the link layer protocol that uses a unique protocol that is different from the network layer (see TCP, UDP), which we called. Protocol used to manage the access number (multiple access protocols), which will further be referred room cooler price in delhi to by the English name is multiple access protocols.
In order to understand the meaning of multiple access protocols need to understand the working principles of the link layer before the link layer is mainly used for communication in the network, called the local network (Local Area. Network: LAN), which provides data transfer speed that is faster than communication over the Internet, hundreds of thousands of times. Therefore, the communication layer, so no need to worry about the data will not be sent to the recipient. If the data is not sent to the recipient (packet lost), it is just being resubmitted only. The system can send new data numerous times during a second, so the communication link layer, thus sending method is called broadcast room cooler price in delhi or transmission, broadcasting to the entire network to the recipient while. network layer uses the communication method called point to point, or to send a particular recipient. We may question why this is not a means of communication, point to point to the link layer in order to not have to send the data scattering room cooler price in delhi around cause packet lost in vain, the answer is actually us. can use point to point transmission data link layer as well, but the problem is that the equipment used to send data point to point, it is more expensive and the process of setting up cumbersome than traditional broadcast. room cooler price in delhi more on link layer has the advantage room cooler price in delhi that there's plenty of bandwidth already. Sending data broadcast, thereby saving the cost of the equipment and time-saving to install the device room cooler price in delhi with so many in the link layer, we used to transfer data broadcast over a point to point the multiple access protocol. It is a protocol that is used to handle the transmission of broadcast data itself.
As well as in layer other protocol options are available in the link layer is protocol room cooler price in delhi for various options available, many of which each had a multiple access protocol in which we will come to understand the multiple access protocol. the three following.
Channel Partitioning Protocols (protocol divides the communication channel) This method divides the available bandwidth into many sections and sub-sections, each section provide a communication channel with each node in the network. Which may be separated by time or by frequency following the protocol used for the above classified. Are as follows:
Time Division room cooler price in delhi Multiplexing: TDM (time division based applications) method is to divide the network deployment time. The SOI time applications into modules and each node can be used for one unit at a time. And it must allow the use of some other node until the cycle known as the (frame) so it can go back and use it again. Each node is configured to use one each time, making each other node can work without being disturbed.
Frequency Division Multiplexing: FDM (frequency division based applications) how the bandwidth is divided room cooler price in delhi into frequency sub. And each node has access frequency sub those, as the bandwidth is 10 Mb and node address 10 node, it will divide the spectrum into frequency sub per 1 Mb and each node has a frequency sub that node by 1. Mb which each node is configured to use different frequencies allows each node to the other node without being disturbed. room cooler price in delhi
Code Division Multiple Access: CDMA (divided use by encoding) This method will set up multiple encryption methods and encryption methods to each individual node for data transmission. This encoding is not the same to make each node can use the network simultaneously room cooler price in delhi without interfering with each other.
Random Access Protocol (protocol randomly) this way every node to send data. Fill the form out simultaneously ignoring the other node sending data or not. If the collision (collision) with each node involved in the collision will cause new data until it is sent to recipient. In which each node sends new information after the collision it is the protocol used to manage room cooler price in delhi the following.
Slotted ALOHA (a toss heads or tails to decide who is sent) method when a collision occurs every node to send a packet to be involved in causing collision must participate in the toss is heads or tails to decide who will. the data (done by the program did not throw real) node that threw the head to the right to send the node that threw Tails must stop waiting earlier if the collision would be to toss the coin again until the final. rest of cast heads the Same node as the node which sends data to the destination in the rest of the node will start the new cast heads or tails until all have participated in the node.

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