Apparatus and method for managing beacon messaging period of vehicular communication

• US 9,510,270 B2
• Filed: 04/01/2013
• Issued: 11/29/2016
• Est. Priority Date: 11/13/2012
• Status: Active Grant

• Current Assignee: Kyungpook National University Industry-Academic Cooperation (Kyungpook National University)
• Original Assignee: Kyungpook National University
• Inventors: Joo, Jhihoon, Han, Dong Seog
• Primary Examiner(s): Nguyen, Steven H
• Assistant Examiner(s): MAGLO, EMMANUEL K
• Application Number:
  US13/854,695
• Publication Number:
  US 20140133347A1
• Time in Patent Office: 1,338 Days
• Field of Search: 370/235, 370/310, 340/902, 701/118
• US Class Current: 1/1
• CPC Class Codes: H04W 48/12 using downlink control channel

Abstract

An apparatus and a method for managing beacon messaging period in a vehicular communication provide adaptive control on beacon messaging period by using packet delivery ratio (PDR) which is measured.

Claims

1. An apparatus for adaptively managing a beacon message transmission period in a vehicular communication, the apparatus comprising:

a packet delivery ratio (PDR) measuring unit which measures a packet delivery ratio (PDR), the packet delivery ratio (PDR) measuring unit connected to a vehicular transmitter and receiver to measure the packet delivery ratio (PDR) of a message for transmission and reception;

a packet delivery ratio (PDR) determining unit which compares the packet delivery ratio (PDR) with a threshold;

a driving lane density measuring unit which measures vehicular density of a driving lane on which a personal vehicle is placed;

a road density measuring unit which measures a vehicular density of a road comprising the driving lane which the personal vehicle is placed and others which the personal vehicle is not placed based on information collected by sensor equipment;

a density comparing unit which compares the road density and the driving lane density; and

a messaging period managing unit which increases the transmission interval of beacon messages to increase the beacon message transmission period when determining via the packet delivery ratio (PDR) determining unit that the packet delivery ratio (PDR) is less than the threshold and the messaging period managing unit decreases the transmission interval of beacon messages to decrease the beacon message transmission period when determining via the density comparing unit that the driving lane density is less than the road density by a predetermined ratio, wherein when determining via the packet delivery ratio (PDR) determining unit that the packet delivery ratio (PDR) is equal to, or greater than the threshold, the messaging period managing unit sets the transmission interval of the beacon messages as a reference transmission interval.

2. The apparatus of claim 1, wherein the reference transmission interval is 100 ms.

3. A method for adaptively managing a beacon message transmission period in a vehicular communication, the method comprising:

a. measuring a packet delivery ratio (PDR) by connecting to a vehicular transmitter and receiver to measure the packet delivery ratio (PDR) of a message for transmission and reception;

b. comparing the packet delivery ratio (PDR) with a threshold; and

c. measuring vehicular density of a driving lane on which a personal vehicle is placed;

d. measuring a vehicular density of a road comprising the driving lane which the personal vehicle is placed and others which the personal vehicle is not placed based on information collected by sensor equipment;

e. comparing the road density and the driving lane density with each other;

f. increasing the transmission interval of beacon messages to increase the beacon message transmission period when determining that the packet delivery ratio (PDR) is less than the threshold at the step b; and

g. decreasing the transmission interval of beacon messages to decrease the beacon message transmission period when determining that the driving lane density is less than the road density by a predetermined ratio at the step e,

wherein when determining at the step (b) that the packet delivery ratio (PDR) is equal to, or greater than the threshold, comprising setting the transmission interval of beacon messages as a reference transmission interval.

4. The method of claim 3, wherein the reference transmission interval is 100 ms.