Energy harvesting cooperative multiple access channel with data arrivals
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Dosyalar
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We consider an energy harvesting two user cooperative Gaussian multiple access channel (MAC), where both of the users harvest energy from nature. The data packets arrive intermittently over time. The users overhear each other's transmitted signals and can cooperate by forming common messages. We find the optimal offline transmit power and rate allocation policy that maximize the departure region. We first show that there exists an optimal policy, in which the single user rate constraints in each time slot are tight, yielding a one to one relation between the powers and rates. Then, we formulate the departure region maximization problem as a weighted sum rate maximization in terms of rates only. Next, we propose a sequential convex approximation method to approximate the problem at each step and show that it converges to the optimal solution. Finally, we solve the approximate problems using an inner outer decomposition method. Numerically, we observe that higher data rates can be supported with the same amount of energy.
Açıklama
Anahtar Kelimeler
Communication channels (information theory), Energy harvesting, Convex approximation methods, Cooperative multiple access, Decomposition methods, Gaussian multiple-access channels, Maximization problem, Optimal solutions, Transmitted signal, Weighted sum-rate maximizations, Problem solving
Kaynak
2016 IEEE International Conference on Communications (ICC)
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
Sayı
Künye
Gürakan, B., Kaya, O. & Ulukuş, Ş. (2016). Energy harvesting cooperative multiple access channel with data arrivals. Paper presented at the 2016 IEEE International Conference on Communications (ICC), 1-6. doi:10.1109/ICC.2016.7511171
