INCREASED PERSISTENCE OF WI-FI DIRECT ADHOC NETWORKS FOR SMARTPHONE-BASED COLLISION AVOIDANCE

摘要

Smartphones with Wi-Fi Direct capability could provide a path to early, low-cost implementation of inter-vehicle communication for collision avoidance. However, there are many limitations to such a system and many obstacles to overcome. Wi-Fi Direct requires the formation of a group with a group owner to handle communication transactions. If the group owner moves out of range, reforming the group is a lengthy process. This paper proposes a new method for nomination of the group owner to reduce the likelihood that the group owner will move out of range. The method introduces the concept of nominating a Backup Group Owner who can quickly replace the group owner if the group owner shuts down or moves out of range. An orderly handoff from the group owner to BGO can prevent loss of communication among nodes. An analytical study of the amount of time saved by adapting the proposed method of electing the BGO is discussed.