TY - JOUR
T1 - Power adaptation for multihop networks with end-to-end BER requirements
AU - Cheng, Hongbing
AU - Yao, Yu Dong
PY - 2010/9
Y1 - 2010/9
N2 - With the requirement of average end-to-end bit error rate (BER) performance, we study power-adaptation problems for multihop ad hoc networks to minimize the power consumption in fading channels, considering two scenarios with regard to the knowledge of the channel-state information (CSI). One is that the transmitter for each hop knows the instantaneous CSI (ICSI) of its hop and all other hops (ICSI/ICSI), and the other is that the transmitter of each hop has only the knowledge of the ICSI of its hop and the average CSI (ACSI) of all other hops (ICSI/ACSI). The two power-adaptation problems (with ICSI/ICSI and ICSI/ACSI) are formulated into nonlinear programming problems, and corresponding power-adaptation solutions/schemes are obtained. Numerical examples are presented to compare the networks with the two proposed power-adaptation schemes and a distributed power-adaptation scheme, in which the transmitter of each individual hop adjusts its transmission power based on its own ICSI and a specified BER requirement for this hop. It is shown that the two proposed schemes have similar power consumptions, and both achieve a noticeable power saving over the distributed scheme.
AB - With the requirement of average end-to-end bit error rate (BER) performance, we study power-adaptation problems for multihop ad hoc networks to minimize the power consumption in fading channels, considering two scenarios with regard to the knowledge of the channel-state information (CSI). One is that the transmitter for each hop knows the instantaneous CSI (ICSI) of its hop and all other hops (ICSI/ICSI), and the other is that the transmitter of each hop has only the knowledge of the ICSI of its hop and the average CSI (ACSI) of all other hops (ICSI/ACSI). The two power-adaptation problems (with ICSI/ICSI and ICSI/ACSI) are formulated into nonlinear programming problems, and corresponding power-adaptation solutions/schemes are obtained. Numerical examples are presented to compare the networks with the two proposed power-adaptation schemes and a distributed power-adaptation scheme, in which the transmitter of each individual hop adjusts its transmission power based on its own ICSI and a specified BER requirement for this hop. It is shown that the two proposed schemes have similar power consumptions, and both achieve a noticeable power saving over the distributed scheme.
KW - End-to-end bit error rate (BER)
KW - multihop networks
KW - optimization
KW - power adaptation
UR - http://www.scopus.com/inward/record.url?scp=77956722610&partnerID=8YFLogxK
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U2 - 10.1109/TVT.2010.2053057
DO - 10.1109/TVT.2010.2053057
M3 - Article
AN - SCOPUS:77956722610
SN - 0018-9545
VL - 59
SP - 3445
EP - 3454
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 7
M1 - 5484602
ER -