8 Best Back to School Tech Gadgets for Students

8 Best Back to School Tech Gadgets for Students

Every student is back at it � the classes, the papers, the exams, the parties, and the dorm life. Every student has his/her smartphone, tablet, and laptop - these are no longer optional �Gadgets� In fact, they let students get a better balance between school and their personal lives. At the same time, students are always looking for more tech to make their college lives easier. Whether these gadgets are directly related to their school work or simply ease their lives in other ways so they have more time for study, they are on the lookout. Here are eight gadgets that just might help.

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A New Adapted Back off Scheme for Broadcasting on IEEE 1609 4 Control Channel in VANET

A New Adapted Back off Scheme for Broadcasting on IEEE 1609 4 Control Channel in VANET

This paper shows that the current works in the field of optimizing the contention window follow:

Propose a static minimum contention window for VANETs
Try to adjust the contention window in function of the vehicle density.

After all, the authors said that regardless of how the local density estimation is accurate, does not solve the problem because the local density cannot show the real data load.

Therefore, they propose two mechanisms:

1- They choose the starting time for each node in the CCH interval based on its geographical position
2- they propose a new back-off mechanism so that the node doesnt frozen its back-off timer by finding a new transmission and continue it until find it zero and then send the packet if find the channel free, otherwise, repeat the same routine.

These scheme shows better performance even if there are some GPS position errors.

Final point: this work distribute the nodes starting time based on their geographical position instead of choosing the optimized contention window. It can decrease the collision probability but it didnt find any answer for adapting the MAC based on the real data load.

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