Reviewer #1: The paper described a "Sensor Deployment in Wireless Sensor Networks with Linear Topology using Virtual Node concept". It was shown that using the proposed deployment strategy, the network can operate for a long time. Overall, this paper is well organized and written, and both theoretical analysis and simulations are provided. But, the reviewer still has some concerns. So, I recommend that you update your paper and re-submit a revised version for further processing 1- Author assumed that sensors nodes are homogeneous sensors which is not realistic at all. Therefore, the deployment strategy should take into consideration the heterogenous nature of real wireless sensor network 2- Author assumed that sensor nodes have same transmission power. In Piratical, this assumption does not hold, and then the effect of the incorporation of the an-isotropic signal attenuation should be considered. 3- The complexity of the proposed approach is not thoroughly discussant, what is the order of complexity of the proposed algorithm ? 4-the main contribution of the manuscript is limited especially that the idea of using virtual nodes is not new. In addition, it is not clear if the proposed algorithm suits only the considered scenario. Reviewer recommend to study the performance of the proposed deployment with different resolutions 5- The simulation results are not convenience enough. Therefore, it is highly recommended to study the Total data messages received at the BS over time with different BS location for the proposed deployment compared with another techniques in the literature. It is also recommended to show the total residual energy of the network for each round 6- The "RELATED Work" section should be substantially improved. Many significant works in this field are missing in the submission. Here are some examples: C Sevgi, A Koçyiğit, "Optimal deployment in randomly deployed heterogeneous WSNs: A connected coverage approach", Journal of Network and Computer Applications, 2014 s.Potthuri, T.Shankar, A.Rajesh, "Lifetime Improvement in Wireless Sensor Networks using Hybrid Differential Evolution and Simulated Annealing (DESA)",Elsevier B.V.Volume 9, Issue 4,Pages 655-663, December 2018 A. El Assaf, S. Zaidi, S. Affes, and N. Kandil, "Optimal Anchors Placement Strategy for Super Accurate Nodes Localization in Anisotropic Wireless Sensor Networks", Proc. IEEE IWCMC'2016, Paphos, Cyprus, September 5-9, 2016. Reviewer #2: There are some issues with the manuscript. First, the topic has been widely investigated over the last twenty years (as confirmed by the references, mainly dated 2000-2010), but the authors somehow failed in describing the novelty of the work with respect to the plethora of existing algorithms. Furthermore, the authors compared their greedy algorithm (which does not seem having theoretical foundations) with the uniform case. But they should have compared it with the optimal solutions, at least for practical cases. Finally, the comparison with the existing literature is quite weak. Reviewer #3: The authors proposed a new approach where the network is formed of virtual nodes, each associated to a certain geographical area. They introduced an analytical model of the network traffic per virtual node and then proposed a greedy algorithm to calculate the number of sensors that should form each virtual node. The concept is good. However it is confusing. What is the author's proposed approach. It is unclear. The table name should be provided above the table. The authors are suggested to check all the figures and tables are correctly cited in the manuscript. What are the advantages and disadvantages of the proposed work? Language is important for writing the research articles. Hence, The language should be corrected. Reviewer #4: In this paper, the problem of sensors deployment is considered for lifetime maximization in a linear wireless sensor networks. A new approach is proposed where the network is formed of virtual nodes, each associated to a certain geographical area. An analytical model of the network traffic per virtual node is proposed, and then a greedy algorithm is proposed to calculate the number of sensors that should form each virtual node. In this paper, the lifetime of the network can be improved if the battery capacity of each sensor is dimensioned taking into account the traffic it generates or relays. 1. The abstract is too cumbersome and needs to be refined. 2. Papers should be mainly expressed in the third person. 3. In this paper, the greedy algorithm proposed is too simple. 4. Some new correlative papers Should be cited.