Channel Estimation And Blocking Probability For Multi Hop Wireless Communication Network Essay

Wireless network infrastructure has become just another connection method for corporate and home users alike. This rapid acceptance can be attributed from:

6. Because of the use of frequency hopping, the likelihood of other wireless networks interfering is very low (Johnson,2004).

We have simulated another network having 30 numbers of nodes. The simulation is made using the same platform used for network 1. This simulation is done taking node 1 as a source and node 28 as destination. The optimal path obtained in this simulation is 1-23-13-28, in which data rate is 0.47 kbps. The second optimal path is 1-17-28, in which data rate is 0.35 kbps. The simulated results are summarized here in

In Fig. 1, the 4 nodes are considered. Among the four nodes 2 of the nodes (Node 1 and Node 2) are primary networks and 2 other nodes (Node A and Node B) are secondary networks. The two networks act in different frequency range. The primary network acts at a range of 2.4GHz - 2.4835GHz range. The secondary network acts at a range of 433MHz - 473MHz represents the block diagram of the proposed system. The use of different frequencies increases the number of users. Node 1 and Node 2 communicate at 2.4GHz and Node A and Node B communicate at 433.9MHz. The nodes are made mobile and this causes high interference. This is cancelled by channeling where the frequencies are slotted. Multi-hop cognitive radio technique occurs when the data is transmitted from one secondary node to another which is out of range via primary node. At that time the primary node which is of MIMO antenna switches itself to the secondary node frequency and transmits the data. Wireless MIMO systems with multiple antennas employed at both the transmitter and receiver have gained attention because of their promising improvement in terms of performance and bandwidth efficiency [8].

A group of wireless sensor nodes (devices) dynamically constructs a temporary network without the exercise of any pre-existing network infrastructure or centralized administration. The main goal of ad-hoc networking is multihop broadcasting in which packets are transferred from source node to destination node through the intermediate nodes (hops). The main function of multi hop WSN is to enable communication between two terminal devices through a bit of middle nodes, which are transferring information from one level to another level. On the foundation of network connectivity, it dynamically gets to determine that which nodes should get included in routing, each node involved in routing transmit the data to further

In the recent years, wireless technologies have taken a new dimension in the ways society lives. Wireless broadband is available to everyone. Whether the users are at home, driving the car, sitting in the park, and it would even work while people are a pleasure boat ride in the middle of a lake. And because of this, the need to have information at any time and be connected in all places, all the time has been satisfied.

Ciampa, M. (2013). WNA Guide to Wireless LAN’s (3rd ed.). [VitalSource Bookshelf]. Retrieved from http://www.devryu.net/

The market for wireless communications has experienced incredible growth over recent years and wireless LANs have rapidly become a very

It’s very important to determine the device and application requirements based on bandwidth, protocols and frequency. In wireless network, bandwidth, protocols and sometime environmental conditions affect the speed of the channel so we need to calculate the aggregate throughputs before designing the network. Today, users carry Wi-Fi devices such as notebooks, laptops, tablets and Smartphone’s so total throughput must be calculated by estimating number of connections rather than the number of the seats. Some common wireless networking standards such as 802.11a/b/g/n invented in the IEEE association must be supported by wireless network. For better performance and for faster devices (802.11n devices), dual-ratio access points should be deployed. Table1 [3] illustrate the different IEEE standards and throughput.

A wireless network is any type of computer network that uses wireless data connections for connecting network nodes .Wireless networking is a method by which homes, telecommunications networks and enterprise (business).Installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Wireless telecommunications networks are generally implemented and administered using radio communication. This implementation takes place at the physical level (layer) of the OSI model  network structure.

Wireless communication is the transfer of information over a distance without the use of enhanced electrical conductors or "wires”.

It has become a primal requirement in current communication system to provide high rate services with higher accuracy and faster data exchange. With the evolution of new communication architectures, the data exchange has got no boundness in forwarding the data to any range. Due to integration of different networks, data are exchange over wireless network and internet network, forming a Internet protocol – Radio access Network (IP-RAN). Due to

Abstract— The ultimate goal of Fiber Wireless (FI-WI) networks is to convergence of various optical and wireless technologies under a single infrastructure in order to take advantage of their complementary features and therefore providing a network capable of supporting bandwidth hungry emerging applications for both fixed and mobile clients. The Fi-Wi architecture is based on radio

The Latest advances in Wireless Communications have extended conceivable applications from straightforward voice services in early cell systems to new incorporated information applications. These days, numerous up to date cellular telephones are likewise incorporated with functionalities including FM radio, advanced camera, and MP3 player. Hence, the services upheld by mobile communications have extended from basic voice to sight and sound, for example, video conferencing and portable gaming. These new services require a higher service quality and also more prominent information rate. Moreover, with mobile access to the Internet, the expanding development in information movement will further drive the requirement for higher data transmission. Current foundations that bolster mostly voice activity are confronting an incredible test in meeting both the transmission capacity and quality of service requests of future mobile communication clients. For mobile communication, one concept with successful improvement is customary single-hop cell frameworks where a mobile station (MS) speaks specifically with a base station (BS) [1]. Another idea of mobile communication is multi hop ad hoc systems, which are infrastructure less, self-sorting out and quickly deployable with no site arranging, dissimilar to traditional cell systems.

challenge in a wireless system design is to overcome the eects of the wireless