Wireless and Mobile Networks (Ad-Hoc Networks)
- Advantages and Applications.
- Cellular VS Ad-Hoc Networks.
- Technical Challenges and Issues.
- Ad-Hoc Wireless Media Access Protocols.
- Ad-Hoc Routing Protocols.
- Providing Quality of Service in Ad-Hoc Networks.
Multi-hop Wireless Networks (MHWNs):
It is defined as a collection of nodes that communicate with each other wirelessly by using radio signals with a shared common channel.
There are several names for MHWNs; it could be called packet radio network, Ad-Hoc network or mobile network.The nodes here could be named stations or radio transmitters and receivers.
- It is a type of MHWNs.
- Nodes in the network are mobile in general.
- The wireless hosts in such networks, communicate with each other without the existing of a fixed infrastructure and without a central control.
- A mobile ad-hoc network can be connected to other fixed networks or to the Internet.
- Most of the Ad-Hoc networks use the allocated frequencies for the Industrial, Scientific and Medical (ISM) band.
Advantages and Applications
Ad-hoc networks have several advantages over the traditional networks, like:
- Ad-hoc networks can have more flexibility.
- It is better in mobility.
- It can be turn up and turn down in a very short time.
- It can be more economical.
- It considered a robust network because of its non-hierarchical distributed control and management mechanisms.
There are lots of applications for Ad-Hoc networks, like:
Group of people with laptops and they want to exchange files and data without having an access point.
Incase if we need to exchange information and the network’s infrastructure has been destroyed.
It is suitable for military communications at battlefield where there is no network infrastructure.
Technical Challenges and Issues
There are several challenges that Ad-Hoc network faces such as:
- Limited wireless range.
- Hidden terminals.
- Packet losses.
- Routes changes.
- Devices heterogeneity.
- Battery power constraints.