METHOD FOR TRANSMITTING AND RECEIVING SAFETY MESSAGE

• US 20090129364A1
• Filed: 08/13/2008
• Published: 05/21/2009
• Est. Priority Date: 11/21/2007
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: PARK, Jong-Hyun, HAN, Kyeong-Soo, LEE, Sang Woo, CHOI, Wan Sik, OH, Hyun Seo
• Application Number:
  US12/190,860
• Publication Number:
  US 20090129364A1
• Time in Patent Office: Days
• US Class Current: 370/345
• CPC Class Codes: H04L 12/4015 by scheduling the transmission of messages at the communication node
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

A method for a first mobile station to transmit a safety message to a second mobile station is provided. The first mobile station competitively transmits a non-safety message to the second mobile station during a first period. The first mobile station spreads a safety message and generates a spread message when a second period starts, and transmits the spread message to the second mobile station. Accordingly, safety message transmission delay or data loss in the inter-vehicle communication can be prevented.

Claims

1. A method for transmitting at least one safety message, comprising:

transmitting a non-safety message from a first mobile station to a second mobile station during a first period; and

transmitting the safety message to the second mobile station during a second period.

2. The method of claim 1, wherein the transmitting of the non-safety message comprises transmitting the non-safety message by using a contention-based manner.

3. The method of claim 2, wherein the transmitting of the safety message comprises:

spreading the safety message when the second period starts and generating at least one spread message; and

transmitting the spread message to the second mobile station during the second time period.

4. The method of claim 3, wherein the generating of the spread message comprises respectively spreading a plurality of safety messages in form of a plurality of codes and generating a plurality of spread messages, and the transmitting of the spread message comprises transmitting the plurality of spread messages during the second period.

5. The method of claim 4, wherein the transmitting of the plurality of spread messages comprises respectively transmitting the plurality of spread messages during a plurality of time slots of the second period.

6. The method of claim 5, wherein a size of each time slot corresponds to time for transmitting one safety message.

7. The method of claim 4, wherein the generating of the plurality of spread messages comprises generating the plurality of codes by using a specific part of a medium access control (MAC) address.

8. A method for receiving a message, comprising:

receiving a first mobile station a non-safety message from a second mobile station during a first period by using a contention-based manner;

receiving the first mobile station at least one safety message from the second mobile station during a second period of a second period; and

despreading the safety message and generating a despread safety message.

9. The method of claim 8, wherein the receiving of the safety message comprises respectively receiving a plurality of safety messages transmitted from the second mobile station during a plurality of time slots of the second period.

10. The method of claim 8, wherein the generating of the despread safety message comprises respectively dispreading a plurality of safety messages in form of a plurality of codes and generating a plurality of despread messages.