SENSOR NETWORK MAC SYSTEM FOR MULTIHOP COMMUNICATION
First Claim
Patent Images
1. A method of synchronizing time of a node forming a multihop sensor network, the method comprising:
- generating a timestamp after delaying transmitting of a beacon frame; and
adding a delayed time value and a timestamp value to the beacon frame.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a method of synchronizing time for a multihop sensor network. According to the method, receiving nodes accurately synchronize time by adding a delay transmission time value to a beacon frame in a beacon mode, or by using a time synchronization frame and time synchronization acknowledgement frame containing time information and superframe structure information in a non-beacon mode. Accordingly, a mesh topology is supported, and a media access control (MAC) structure having high reliability and low delay time is provided.
-
Citations
11 Claims
-
1. A method of synchronizing time of a node forming a multihop sensor network, the method comprising:
-
generating a timestamp after delaying transmitting of a beacon frame; and adding a delayed time value and a timestamp value to the beacon frame. - View Dependent Claims (2, 3)
-
-
4. A method of synchronizing time of a node in a multihop sensor network, the method comprising:
-
synchronizing time based on a timestamp value of a first time synchronization frame received from a neighboring node; generating a second time synchronization frame having an increased hop distance value; and broadcasting the second time synchronization frame to the multihop sensor network. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
-
Specification