TY - GEN
T1 - Adaptive multi-antenna power control in wireless networks
AU - Siam, Mohammad Z.
AU - Krunz, Marwan
AU - Muqattash, Alaa
AU - Cui, Shuguang
PY - 2006
Y1 - 2006
N2 - Transmission power control has often been used in wireless packet networks to improve the channel reuse and reduce energy consumption. It has been mainly applied to single-input single-output (SISO) systems, where each node is equipped with a single antenna. In this paper, we propose a power-controlled channel access protocol for MIMO-capable wireless LANs with two antennas per node. Our protocol, called E-BASIC, is based on a modification of the classic CSMA/CA access scheme, where we dynamically adjust the "transmission mode" and the transmission power on a per-packet basis so as to minimize the total energy consumption. By "transmission mode" we mean one of the four possible transmit/receive antenna configurations: 1 × 1 (SISO), 2 × 1 (MISO), 1 × 2 (SIMO), and 2 × 2 (MIMO). Our energy model accounts for both the transmission and the circuit powers. While the MIMO mode requires less RF transmission energy than the other three modes, it also incurs the highest circuit energy consumption. Depending on the transmitter-receiver distance, any of the four modes can be the "optimal" one in terms of minimizing the total energy consumption. We study the performance of E-BASIC in ad hoc and infrastructure-based scenarios and compare it with two channel access protocols (802.11 and BASIC) that use a fixed transmission mode (SISO or MIMO) all the time. Our simulations show that E-BASIC often consumes much less total energy than the reference protocols. We further incorporate E-BASIC into the design of a power-aware routing (PAR) scheme that uses a variant of Dijkstra's algorithm to select the most energy-efficient end-to-end path between nodes.
AB - Transmission power control has often been used in wireless packet networks to improve the channel reuse and reduce energy consumption. It has been mainly applied to single-input single-output (SISO) systems, where each node is equipped with a single antenna. In this paper, we propose a power-controlled channel access protocol for MIMO-capable wireless LANs with two antennas per node. Our protocol, called E-BASIC, is based on a modification of the classic CSMA/CA access scheme, where we dynamically adjust the "transmission mode" and the transmission power on a per-packet basis so as to minimize the total energy consumption. By "transmission mode" we mean one of the four possible transmit/receive antenna configurations: 1 × 1 (SISO), 2 × 1 (MISO), 1 × 2 (SIMO), and 2 × 2 (MIMO). Our energy model accounts for both the transmission and the circuit powers. While the MIMO mode requires less RF transmission energy than the other three modes, it also incurs the highest circuit energy consumption. Depending on the transmitter-receiver distance, any of the four modes can be the "optimal" one in terms of minimizing the total energy consumption. We study the performance of E-BASIC in ad hoc and infrastructure-based scenarios and compare it with two channel access protocols (802.11 and BASIC) that use a fixed transmission mode (SISO or MIMO) all the time. Our simulations show that E-BASIC often consumes much less total energy than the reference protocols. We further incorporate E-BASIC into the design of a power-aware routing (PAR) scheme that uses a variant of Dijkstra's algorithm to select the most energy-efficient end-to-end path between nodes.
KW - Ad hoc networks
KW - Energy efficiency
KW - IEEE 802.11
KW - Infrastructure-based networks
KW - MIMO
KW - Power control
KW - Power-aware routing
UR - http://www.scopus.com/inward/record.url?scp=34247350449&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34247350449&partnerID=8YFLogxK
U2 - 10.1145/1143549.1143724
DO - 10.1145/1143549.1143724
M3 - Conference contribution
AN - SCOPUS:34247350449
SN - 1595933069
SN - 9781595933065
T3 - IWCMC 2006 - Proceedings of the 2006 International Wireless Communications and Mobile Computing Conference
SP - 875
EP - 880
BT - IWCMC 2006 - Proceedings of the 2006 International Wireless Communications and Mobile Computing Conference
T2 - IWCMC 2006 - 2006 International Wireless Communications and Mobile Computing Conference
Y2 - 3 July 2006 through 6 July 2006
ER -