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The IUP Journal of Computer Sciences :
Congestion Control Analysis Over Wireless Ad Hoc Networks
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There is a huge increment in the use of mobile devices in the last few years. As the number of clients of smartphone is increasing, the traffic contents generated are also expanding. Huge mass of information is generated and shared between many users. Along with the network come various parameters like overhead, delay, throughput, jitter, dropping ratio, energy, Packet Delay Ratio (PDR), etc. These parameters decide the flexibility and lifetime of the network. Opportunistic network is unconstrained communication between the clients of digital pockets (mobile gadgets). The solution to making this opportunistic network better by increasing or decreasing the discussed parameters as per requirement has been proposed by dividing the particular area into dense and sparse networks. A particular node is selected which broadcasts the message according to the type of network.

 
 
 

Obtaining relevant data becomes difficult with increasing amount of information. Opportunistic network makes the mobile device aware of the presence of other mobile devices and is able to discover each and share the data with each other. In communication system, the data accessed from Internet are shared in packets. These packets are combined from small number of pieces. Router decides the path of data from source to destination and changes the route or link if the link fails. Thus the mobile node consists of source, router and destination. There are a couple of presumptions regarding getting information on the web:
• Continuous, bidirectional and end-to-end path;
• Short round trips;
• Symmetric data rates; and
• Low error rates
Generally, sharing of data follows the following environment:
• Intermittent connectivity;
• Long or variable delay;
• Asymmetric data rates; and
• High error rates
In delay tolerant networks, the idea of store and forward message is used along with dividing the area according to its social utility (Talipov et al., 2013). In opportunistic network, the content is always at the higher priority rather than knowing about its users. The most popular contents are stored by referring it to content popularity distribution. Also, the relation between area and related information is considered in opportunistic network. For instance, the schedule of transport timings on transport stand indicates timings of closed theater. This is related to mapping to interest distribution. Indeed, even the pack in the region as indicated by its timings is correlated.
Figure 1 exhibits the general strategy for sharing data in opportunistic system. Request message is created by node A, which examines the information; node B forwards the request message to node C, since it does not locate the coordinating content with it. Node C finds the required information with it, so it creates the reaction message and forwards it to node A. All the sharing is done if the time is not passed, the substance is shared or the request message will be dropped if due time is crossed (Suzan et al., 2016). Content revelation and substance conveyance are two stages of recovering information. Opportunistic system works under 300 m.

 
 
 

Computer Sciences IUP Journal ,MANET, TCP congestion control algorithms, Reno, New reno, Vegas