TY - JOUR
T1 - A mechanism to resolve congestion by adapting the MIMO transmission mode in the MANET environment
AU - Oh, Hayoung
AU - Ahn, Sanghyun
N1 - Publisher Copyright:
© 2014 International Information Institute.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - The MIMO antenna system has two optional transmission modes, MUX and DIV. The MUX mode increases data rate and the DIV mode enhances reliability or transmission range. In order to provide connectivity in a MANET, a MTMO-aware routing mechanism, MIR, was proposed. In MIR, when nodes are close to each other, the MUX mode is used and the DIV mode is used only for disconnected links. Therefore, if a node receives packets from its previous-hop nodes through the MUX mode and transmits packets in the DIV mode, the node may suffer from congestion. To resolve this type of congestion, we propose a mechanism that allows a congested node to adaptively control the MIMO transmission mode of its previous-hop nodes. For the determination of when to request for the MIMO transmission mode change, four levels of queue thresholds are defined. Based on the queue size, the congestion resolution or the throughput recovery operation is performed. We show the performance of our proposed mechanism by carrying out Qualnet-based simulations. The simulation results prove that our mechanism handles congestion situation appropriately.
AB - The MIMO antenna system has two optional transmission modes, MUX and DIV. The MUX mode increases data rate and the DIV mode enhances reliability or transmission range. In order to provide connectivity in a MANET, a MTMO-aware routing mechanism, MIR, was proposed. In MIR, when nodes are close to each other, the MUX mode is used and the DIV mode is used only for disconnected links. Therefore, if a node receives packets from its previous-hop nodes through the MUX mode and transmits packets in the DIV mode, the node may suffer from congestion. To resolve this type of congestion, we propose a mechanism that allows a congested node to adaptively control the MIMO transmission mode of its previous-hop nodes. For the determination of when to request for the MIMO transmission mode change, four levels of queue thresholds are defined. Based on the queue size, the congestion resolution or the throughput recovery operation is performed. We show the performance of our proposed mechanism by carrying out Qualnet-based simulations. The simulation results prove that our mechanism handles congestion situation appropriately.
KW - MANET
KW - MIMO
KW - Queue threshold
KW - Routing
KW - Spatial diversity mode
KW - Spatial multiplexing mode
UR - http://www.scopus.com/inward/record.url?scp=84921766394&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84921766394
SN - 1343-4500
VL - 17
SP - 5387
EP - 5396
JO - Information
JF - Information
IS - 11A
ER -