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Cross-Layer Service Discovery Mechanism for OLSRv2 Mobile Ad Hoc Networks.

Vara MI, Campo C - Sensors (Basel) (2015)

Bottom Line: Each node in the ad hoc network only advertises its own services.Each node maintains two service tables, one to store information about its own services and another one to store information about the services it discovers in the network.We present simulation results, that compare our service discovery integrated into OLSRv2 with the one defined for OLSRv1 and with the integration of service discovery in Ad hoc On-demand Distance Vector (AODV) protocol, in terms of service discovery ratio, service latency and network overhead.

View Article: PubMed Central - PubMed

Affiliation: Department of Telematic Engineering, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganes, Madrid, Spain. maribelvaralorenzo@gmail.com.

ABSTRACT
Service discovery plays an important role in mobile ad hoc networks (MANETs). The lack of central infrastructure, limited resources and high mobility make service discovery a challenging issue for this kind of network. This article proposes a new service discovery mechanism for discovering and advertising services integrated into the Optimized Link State Routing Protocol Version 2 (OLSRv2). In previous studies, we demonstrated the validity of a similar service discovery mechanism integrated into the previous version of OLSR (OLSRv1). In order to advertise services, we have added a new type-length-value structure (TLV) to the OLSRv2 protocol, called service discovery message (SDM), according to the Generalized MANET Packet/Message Format defined in Request For Comments (RFC) 5444. Each node in the ad hoc network only advertises its own services. The advertisement frequency is a user-configurable parameter, so that it can be modified depending on the user requirements. Each node maintains two service tables, one to store information about its own services and another one to store information about the services it discovers in the network. We present simulation results, that compare our service discovery integrated into OLSRv2 with the one defined for OLSRv1 and with the integration of service discovery in Ad hoc On-demand Distance Vector (AODV) protocol, in terms of service discovery ratio, service latency and network overhead.

No MeSH data available.


Network overhead in OLSRv2 and AODV with service discovery.
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f12-sensors-15-17621: Network overhead in OLSRv2 and AODV with service discovery.

Mentions: As we can observe from Figure 12, OLSRv2 service discovery (SD-OLSRv2) introduces more overhead than AODV service discovery (SD-AODV) in any of the scenarios simulated, except for the one without a flooding limited scope for SREQs and node average speed set to 10 m/s. OLSRv2 sends periodically route and service update information throughout the entire network. Although it uses MPRs to broadcast control messages within the network, this increases the network overhead. We also observe that in SD-OLSRv2, no additional overhead occurs as the network mobility becomes higher. The network overhead comes from periodic route and service updates and is independent of the traffic mobility patterns. On the contrary, SD-AODV introduces lower overhead than SD-OLSRv2 in networks with a low number of nodes with low mobility. As the size of the network increases and the nodes move faster, SD-AODV suffers more network overhead. If SREQs are broadcast throughout the entire network with node average speed set to 10 m/s, SD-AODV behaves worse than SD-OLSRv2 in terms of packet overhead. As we can observe in networks with 100 nodes, this fact becomes more significant as the size of the network increases.


Cross-Layer Service Discovery Mechanism for OLSRv2 Mobile Ad Hoc Networks.

Vara MI, Campo C - Sensors (Basel) (2015)

Network overhead in OLSRv2 and AODV with service discovery.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541951&req=5

f12-sensors-15-17621: Network overhead in OLSRv2 and AODV with service discovery.
Mentions: As we can observe from Figure 12, OLSRv2 service discovery (SD-OLSRv2) introduces more overhead than AODV service discovery (SD-AODV) in any of the scenarios simulated, except for the one without a flooding limited scope for SREQs and node average speed set to 10 m/s. OLSRv2 sends periodically route and service update information throughout the entire network. Although it uses MPRs to broadcast control messages within the network, this increases the network overhead. We also observe that in SD-OLSRv2, no additional overhead occurs as the network mobility becomes higher. The network overhead comes from periodic route and service updates and is independent of the traffic mobility patterns. On the contrary, SD-AODV introduces lower overhead than SD-OLSRv2 in networks with a low number of nodes with low mobility. As the size of the network increases and the nodes move faster, SD-AODV suffers more network overhead. If SREQs are broadcast throughout the entire network with node average speed set to 10 m/s, SD-AODV behaves worse than SD-OLSRv2 in terms of packet overhead. As we can observe in networks with 100 nodes, this fact becomes more significant as the size of the network increases.

Bottom Line: Each node in the ad hoc network only advertises its own services.Each node maintains two service tables, one to store information about its own services and another one to store information about the services it discovers in the network.We present simulation results, that compare our service discovery integrated into OLSRv2 with the one defined for OLSRv1 and with the integration of service discovery in Ad hoc On-demand Distance Vector (AODV) protocol, in terms of service discovery ratio, service latency and network overhead.

View Article: PubMed Central - PubMed

Affiliation: Department of Telematic Engineering, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganes, Madrid, Spain. maribelvaralorenzo@gmail.com.

ABSTRACT
Service discovery plays an important role in mobile ad hoc networks (MANETs). The lack of central infrastructure, limited resources and high mobility make service discovery a challenging issue for this kind of network. This article proposes a new service discovery mechanism for discovering and advertising services integrated into the Optimized Link State Routing Protocol Version 2 (OLSRv2). In previous studies, we demonstrated the validity of a similar service discovery mechanism integrated into the previous version of OLSR (OLSRv1). In order to advertise services, we have added a new type-length-value structure (TLV) to the OLSRv2 protocol, called service discovery message (SDM), according to the Generalized MANET Packet/Message Format defined in Request For Comments (RFC) 5444. Each node in the ad hoc network only advertises its own services. The advertisement frequency is a user-configurable parameter, so that it can be modified depending on the user requirements. Each node maintains two service tables, one to store information about its own services and another one to store information about the services it discovers in the network. We present simulation results, that compare our service discovery integrated into OLSRv2 with the one defined for OLSRv1 and with the integration of service discovery in Ad hoc On-demand Distance Vector (AODV) protocol, in terms of service discovery ratio, service latency and network overhead.

No MeSH data available.