## Joint Modulation and Multiple Access Optimization under Energy Constraints (2004)

Venue: | Proceedings of Globecom’04 |

Citations: | 25 - 11 self |

### BibTeX

@INPROCEEDINGS{Cui04jointmodulation,

author = {Shuguang Cui and Andrea Goldsmith and Ahmad Bahai},

title = {Joint Modulation and Multiple Access Optimization under Energy Constraints},

booktitle = {Proceedings of Globecom’04},

year = {2004},

pages = {151--155}

}

### Years of Citing Articles

### OpenURL

### Abstract

Abstract — We consider radio applications in sensor networks where energy is a limited resource so that energy consumption must be minimized while satisfying given delay and throughput requirements. In this context, we analyze energy-efficient data collection strategies where we minimize the total energy consumption necessary for collecting a certain amount of data from multiple sensors. The total energy consumption includes both the transmission energy and the circuit energy consumption. We propose a variable-length TDMA scheme where the slot length is adaptively assigned according to the number of bits in the transmitting queues and the distance between the transmitting nodes and the collecting node. The underlying goal is to finish the collection of information bits from the multiple sensor nodes before a deadline T with minimum energy cost. We show that the problem can be efficiently solved by convex relaxation methods, and in some special cases simple analytical solutions can be derived. Index Terms — Energy efficiency, modulation optimization, Multiple access, Cross-layer.

### Citations

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Citation Context ...pproximating bopt as b⋆ opt is bounded as ζ � Eub − Eopt Eopt due to the fact that Eopt ≥ Elb. ≤ Eub − Elb Elb (5) The relaxed convex problem can be efficiently solved using the interior point method =-=[12]-=-. Specifically, for a convex problem in the following format minimize f0(b) , (6) subject to fi(b) ≥ 0 i =1,...,m we can first convert this constrained problem into an unconstrained one by utilizing t... |

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Citation Context ...erly designed. Since for analog circuits the leaking power consumption is usually much smaller than the power consumption in the active mode (which may not be true for deep sub-micron CMOS technology =-=[11]-=-), it is neglected in the total energy consumption. However, it is straightforward to extend our model to include the energy consumption in the sleep mode. For uncoded MQAM, as discussed in [6] and [8... |

235 |
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(Show Context)
Citation Context ... joint task where per-node fairness is not emphasized, the design intention is to minimize the total energy consumption in the network instead of minimizing energy consumption of individual nodes. In =-=[3]-=- the authors show that the hardware, the link layer, the MAC layer, and all other higher layers should be jointly designed to minimize the total energy consumption for energy-constrained wireless netw... |

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64 | Modulation scaling for energy aware communication systems
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(Show Context)
Citation Context ...ors show that the hardware, the link layer, the MAC layer, and all other higher layers should be jointly designed to minimize the total energy consumption for energy-constrained wireless networks. In =-=[4]-=-−[8], joint design strategies between the link layer and This work is supported by funds from National Semiconductor. S. Cui and A. J. Goldsmith are with the Wireless System Lab, Department of Electri... |

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(Show Context)
Citation Context ...deration. In recent years, researchers have shown great interest in the technical as well as application issues associated with sensor networks. The µAMPs project [1] at MIT and the PicoRadio project =-=[2]-=- at Berkeley are investigating energyconstrained radios and their impact on overall network design. For sensor networks, maximizing the network lifetime is the main concern. Since sensor networks are ... |

34 |
Modulation optimization under energy constraints
- Cui, Goldsmith, et al.
- 2003
(Show Context)
Citation Context ...umption is no longer negligible in comparison with the transmission energy. To achieve an energy-efficient system design, we extend the point-to-point joint energy minimization techniques proposed in =-=[6]-=-−[8] to the multiple access scenario and propose an energy-efficient variable-length Time Division Multiple Access (TDMA) scheme by extending the cross-layer design effort up to the MAC layer. We use ... |

31 | A framework for energy-scalable communication in high-density wireless networks - Min, Chandrakasan - 2002 |

14 | Energy-constrained modulation optimization for coded systems - Cui, Goldsmith, et al. - 2003 |

5 |
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Citation Context ...tion is a very important design consideration. In recent years, researchers have shown great interest in the technical as well as application issues associated with sensor networks. The µAMPs project =-=[1]-=- at MIT and the PicoRadio project [2] at Berkeley are investigating energyconstrained radios and their impact on overall network design. For sensor networks, maximizing the network lifetime is the mai... |

4 |
Energy-constrained Modulation Optimization,” to appear at
- Cui, Goldsmith, et al.
- 2003
(Show Context)
Citation Context ...show that the hardware, the link layer, the MAC layer, and all other higher layers should be jointly designed to minimize the total energy consumption for energy-constrained wireless networks. In [4]−=-=[8]-=-, joint design strategies between the link layer and This work is supported by funds from National Semiconductor. S. Cui and A. J. Goldsmith are with the Wireless System Lab, Department of Electrical ... |