Literature Database Entry

rezaei2016robust

Atefeh Rezaei, Paeiz Azmi and Nader Mokari, "Robust resource allocation in Cloud-RAN network based on COMP technology," Proceedings of 8th International Symposium on Telecommunications (IST 2016), Tehran, Iran, September 2016, pp. 293–298.

Abstract

In this paper, we consider a joint transmission scheme of coordinated multi-point (COMP) technology in communication networks. In this kind of networks, data can be transmited from multiple points to a user in a time-frequency resource, simultaneously. Because of high signaling and successive delays, channel state information at the transmitter (CSIT) may be incorrect. In this regard, we devise the robust beamformers that minimizes the total transmit power while the quality of service (QoS) constraints are satisfied and uncertainty of CSIT is taken into account. For CSIT uncertainty model, two schemes are proposed: 1) we assume that CSIT imperfection is a Euclidean ball-shaped uncertainty set with specified considered error bound. This problem is a quadratically constrained quadratic problem (QCQP) that can be transformed into a semidefinite program (SDP). 2) we choose stochastic robustness method that reformulates the purposed power minimization in a chance constrained programming (CCP) form. In this kind of problems, some methods are employed to find closed form of constraints. In this article, the closed-form of SINR constraint is obtained with Bernstein approximation. Finally, it is converted to a SDP problem. Simulation results show that when CSIT is imperfect, more transmit power is needed to guarantee the target of the constraint but by Bernstein approximation this increasing cost is slow and lower than the other existing methods.

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Atefeh Rezaei
Paeiz Azmi
Nader Mokari

BibTeX reference

@inproceedings{rezaei2016robust,
    author = {Rezaei, Atefeh and Azmi, Paeiz and Mokari, Nader},
    doi = {10.1109/istel.2016.7881828},
    title = {{Robust resource allocation in Cloud-RAN network based on COMP technology}},
    pages = {293--298},
    publisher = {IEEE},
    address = {Tehran, Iran},
    booktitle = {8th International Symposium on Telecommunications (IST 2016)},
    month = {9},
    year = {2016},
   }
   
   

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Last modified: 2024-04-26