to reduce power consumption and reuse the limited radio spectrum resources, a cellular network was formed. cell size is one of the factors in channel reuse rate.basically channel reuse rate in smaller cell size is higher than the channel reuse rate in bigger cell size.A cellular architecture would then present a challenge to the frequent handover procedure to the smaller cell size would usually induce a higher hand-off frequency. in addition to cellular network an adhoc network is another network architecture for wireless networks. The adhoc network is non infrastructure network in which nodes can access services from one another regardless where they are. the main difference between a cellular environment and adhoc network is that the adhoc method has no infrastructure allowing nodes to communicate with one another at any time and any where.
A mobile Adhoc network (MANET) is a self-configuring infrastructure-less network of mobile devices connected by
Ad hoc mode:An Ad-hoc network allows each device to communicate directly with each other. There is no central Access Point controlling device communication. Ad-hoc networks are only able to communicate with other Ad-hoc devices, they are not able to communicate with any Infrastructure devices or any other devices connected to a wired network. In addition, Ad-hoc mode security is less sophisticated compared to an Infrastructure mode network.Infrastructure mode:An Infrastructure mode network requires the use of an Access Point. The Access Point controls Wireless communication and offers several important advantages over an Ad-hoc network. For example, a Infrastructure based network supports increased levels of security, potentially faster data transmission speeds and integration with a wired network.
Advantage: Easy to set up Cheap Disadvantage: Lack of security. Thus ad-hoc network is also called unsecure networks.
bcoz 3G has better coverage, and is more secure than wifi and other adhoc networks
u need 5.00m33 to play online and 4.11m33 to play adhoc
Evaluation of wireless networks for performance evaluation is a popular research area and a wealth of literature exists in this area. Wireless networks in infrastructure mode as well as Ad-hoc networks such as MANETs are considered extensively. Simulation results are provided for E-learning scenarios for cases where wireless networks in infrastructure mode are employed, however the possibilities of using adhoc networks and performance evaluation of e-learning scenarios with ad hoc networks are not considered. This paper presents an evaluation of the performances for wireless Ad-hoc networks employed in typical e-learning environment by using the OPNET modeler. Numerical simulation results, discussions and comparisons are provided. The results can be of great help for optimization studies in typical e-learning environments. The performance issues are considered together with scalability concerns.
Generally a adhoc network is a wireless network but instead of been managed by a hub or switch a computer runs the network. A adhoc network is typically a wireless connection between two or more computers without the use of a hub or switch, where as a wireless network generally has some piece network hardware running the network that is only meant to facilitate connections and not make them its self.
clustering means backingup a server with another...dat means getting backup frm anther server when d actual server breaks down
Both are wireless networks. ad hoc facilitates us to connect to another w/l client without a central access point.
Because the E1000 PSP has no wireless capabilities it can't go into adhoc mode.
Adhoc Party for PlayStation Portable was created on 2008-11-06.