TY  - JOUR
PY  - 2018//
TI  - Location-assistant content distribution scheme for emergency rescue
JO  - International journal of distributed sensor networks
A1  - Zhang, Guomin
A1  - Song, Lihua
A1  - Wang, Haitao
A1  - Hu, Chao
A1  - Wang, Na
SP  - e1550147718800464
EP  - e1550147718800464
VL  - 14
IS  - 9
N2  - In order to optimize the timeliness and pertinence of message delivery in emergency rescue scenarios and improve the service performance of emergency communications network, we propose a location-assistant content distribution scheme based on delay tolerant network. First of all, considering that the movement patterns of rescue teams tend to follow a predetermined course of action, we design a location-based group mobility model. Due to the intermittent network connectivity and variety of emergency service, a content-classification-based publish/subscribe architecture and a GenericSpray routing algorithm based on the prediction of overlap opportunity in spatio-temporal positions are proposed. Furthermore, we also give a cache management strategy based on the content significance. Since location-assistant content distribution scheme can predict the overlap of activity between rescue teams through the course of action, not only can the number of copy forwarding and message delivery delays be significantly reduced but also the priority delivery of important messages can be ensured by message classification. Simulation experiments show that compared with the traditional delay tolerant network routing algorithm and the classic first-in-first-out caching strategy, location-assistant content distribution scheme improves the performance of message delivery rate, transmission delay, and control overhead significantly.<p />  <p>Language: en</p>
LA  - en
SN  - 1550-1329
UR  - http://dx.doi.org/10.1177/1550147718800464
ID  - ref1
ER  -