How do unicast transmission happens in location based routing?

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Safae Smiri

Hi Akashah Arshad ,

In Unicast routing, the delivery of information is from unique source to the unique destination by selecting one hop best neighbor to relay data packet directly without prior route discovery (i.e. GPSR is a location based unicast routing).

The basic principle of location based routing protocol follows Greedy Forwarding mechanism, which requires only the location of source vehicle, its neighbors and the destination. The vehicle obtains its own location by using positioning technology such as GPS. Also, each vehicle periodically broadcasts its current location, speed, etc. through beacon messages.

The actual routing decision is based on the location of the destination that is included in the packet header and is obtained through location services.

Hope this will help you.

Best regards

Akashah Arshad

Thank you for your prompt reply Safae Smiri. My next question are there any possibilities the packet got lost during the unicast transmission?

Sai R N

You can look at these two unicast location/geographical routing options in NetSim:

1. Location aware routing(LAR)

2. Most forward within fixed radius (MFR)

The link with some documentation and code is https://tetcos.freshdesk.com/a/solutions/articles/14000096743

With pleasure Akashah Arshad.

The data packet may also encounter wrong directional transmission and routing loop depending on the situation of communicating. For example, if greedy forwarding is not workable (void region), and if there is no alternative technique, then this causes packet drop.

Thanks again Safae Smiri . What about when the next-hop node is an attacker. It sends a fake location. The fake location is inside the transmission range. What do you think about what happened to the packet sent to this fake location? Can you suggest good reading material for this? Thank you

Hello Akashah Arshad

I think the following papers can help you:

Article A comprehensive survey: Benefits, Services, Recent works, Ch...

Article Location based routing protocols in VANET: Issues and existi...

Conference Paper Secure Routing Protocols for Wireless Sensor Networks