Method on localization message process for supporting mobility of wireless nodes

A media access control (MAC) super frame structure for supporting localization of single or multiple mobile nodes in a multi-hop sensor network formed of a plurality of clusters, comprising:

• a beacon slot period where a beacon frame is transmitted;
• a first competition access period where each of nodes performs data communication by trying to occupy a channel competitively using a common time hoping sequence;
• a competition free period where a predetermined node performs exclusive data communication using a unique time hoping sequence;
• a second competition access period where each of the nodes performs data communication by trying to occupy a channel competitively using a common time hoping sequence;
• a third competition access period where each of the nodes performs data communication by trying to occupy a channel competitively using a common hoping sequence;
• and
• an inactive period where each of the nodes sustains a sleep state.

A method for localization message process of a cluster head, comprising:

• at the cluster head, generating and broadcasting a beacon frame in a beacon slot period;
• at the cluster head, allocating cluster resources to a new mobile node in a first competition access period;
• at the cluster head, broadcasting cluster state information in the first competition access period by controlling a cluster operation state for all of mobile nodes;
• at the cluster head, receiving location information or location data from each of corresponding mobile nodes in each competition free period;
• and
• at the cluster head, transmitting location information or location data to other nodes in second and third competition access periods.

A method for localization message process of an anchor node, comprising:

• at the anchor node, receiving a beacon frame by inspecting a channel state;
• at the anchor node, determining whether the received beacon frame is a beacon of an own cluster where the anchor node belongs to;
• at the anchor node, supporting measuring a distance to each of corresponding mobile nodes in each competition free period by obtaining cluster head resource allocation information and cluster state information and exchanges data in second and third competition access periods if the received beacon frame is a beacon of an own cluster where the anchor node belongs to;
• and
• at the anchor node, receiving adjacent cluster state information and exchange data in the third competition access period by confirming a remaining access period of an adjacent cluster if the received beacon frame is not a beacon of an own cluster where the anchor node belongs to.

A method for localization message process of a mobile node, comprising:

• at a mobile node, receiving a beacon frame from a cluster head and determining the received beacon frame is a beacon of an own cluster where the mobile node belongs to;
• at the mobile node, receiving cluster state information from the cluster head and confirming a time interval if the received beacon frame is a beacon of an own cluster where the mobile node belongs to;
• at the mobile node, performing cluster connection request and resource allocation, receiving cluster state information from the cluster head, and confirming a time interval if the received beacon frame is a beacon of a new cluster;
• and
• at the mobile node, measuring a distance to an anchor node in a competition free period allocated to the mobile node and transmitting location information or location data to the cluster head.

A computer readable recording medium storing a method for localization message process, the method comprising:

• allocating cluster resources for recognizing a location of a mobile node;
• setting operation of each node by deciding a cluster operation state for the mobile node;
• measuring distances between the mobile node to each of anchor nodes;
• and
• recognizing a location of the mobile node.