Energy-Saving Method for Nearby Wireless Battery-Powered Trackers Based on Their Cooperation
, Agnius Liutkevičius 1,*, Laura Kižauskienė 1, Audronė Janavičiūtė 1 and Roman Banakh 2Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThis work aims to reduce energy consumption in tracking systems for cargo items located in closed positions environments, such as inside a truck. The proposed approach minimizes the number of transmissions needed to report positions by using a cooperative technique, where one device is elected to transmit the location data of nearby devices.
1) In abstract the authors states that ”none of the existing energy-saving strategies considers situations in which multiple tracking devices are transported together and can cooperate to further increase their energy efficiency.” and in line 154 they refer “To our knowledge, neither article suggests a method that would allow tracking devices to cooperate in order to minimize their communication with the central server and, as a consequence, to reduce battery drain.” Also in line171 the authors only considers that the previous studies rely only on the usage of low-power (sleeping) modes and periodic communications for energy saving purposes.
However, this is a typical problem in wireless sensor networks, by electing a device to transmit aggregated data. Therefore, the authors should consider this problem and solutions before proposing a technique for cargo tracking, because several papers deals with similar purposes. Examples of systems operated by battery with cooperative methods:
- C. Anitha, G. M. Karthik, M. Uma Maheswari, L. V. Kumar, G. Sasikala and J. S, "A Robust Design of Cooperative Model to Enhance Energy Efficiency over Heterogeneous 5G Wireless Sensor Network Paradigm," 2024 Asia Pacific Conference on Innovation in Technology (APCIT), MYSORE, India, 2024, pp. 1-6, doi: 10.1109/APCIT62007.2024.10673603.
- Vikram Kumar, Neil W. Bergmann, Izanoordina, Raja Jurdak, Branislav Kusy, “Cluster-based Position Tracking of Mobile Sensors”, IEEE Conference on Wireless Sensors(ICWiSE) 2016.
- C. Zhang and S. Fei, "Energy efficient target tracking algorithm using cooperative sensors," in Journal of Systems Engineering and Electronics, vol. 23, no. 5, pp. 640-648, Oct. 2012.
- Weirong Liu, Yun He, Xiaoyong Zhang, Fu Jiang, Kai Gao, and Jianming Xiao, “Energy-Efficient Node Scheduling Method for Cooperative Target Tracking in Wireless Sensor Networks”, Hindawi Publishing Corporation, Mathematical Problems in Engineering, Volume 2015, Article ID 627479, 11 pages.
- Jayashree Dev1, and Jibitesh Mishra, Energy-Efficient Object Detection and Tracking Framework for Wireless Sensor Network, Sensors, 2023, 23(2), 746.
- Kaiser J, Hernandez MP, Kaupe V, Kurrek P, McFarlane D. “An agent-based approach for energy-efficient sensor networks in logistics”. Eng Appl Artif Intell 2024 Jan 1;127:107198.
2) What happens when multiple tracker devices are transported together and using different technologies?
3) In section 2.2 is presented the proposed technique that considers three phases: Neighbor Discovery, Data Synchronization, and Leader Node Election Algorithms. Since these phases are common to other techniques what is new in this work?
4) A neighbor discovery time window of 30 s appears to be excessively long. Why not synchronize the devices using an existing time synchronization protocol capable of achieving a time synchronization within one second?
5) In flowcharts of figures 2, 3, 4, I do not understand the meaning of the decision blocks with multiple inputs and only one output.
6) References for the components used in experimental setup are missing.
7) In some graphs, the use of gray color makes it difficult to read the values.
8) A comparison of the energy-saving results with other studies having similar objectives of data transmission to a central unit is missing.
Author Response
Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
Comments and Suggestions for AuthorsThe article describes the energy-saving method, which can be implemented in various wireless cargo or other asset tracking devices that operate using battery power. There are some comments as follows.
1. The background, motivation, novelty, main contributions of this paper should be provided in abstract.
2. What’s the novelty and strengths of the proposed energy-saving method?
3. There are some writing issues to be checked and revised. For example, “their location” should be revised as “their locations”.
4. The contributions of recent works on energy saving and IoT should be compared and introduced.
5. Recent works on energy saving and IoT should be introduced, such as Distributed DDPG-based resource allocation for age of information minimization in mobile wireless-powered Internet of Things, IEEE IoTJ.
6. The logic of the introduction should be revised and improved for readability.
7. Authors are suggested to provide a name for the proposed energy-saving method.
8. In figure 2, the flowchart of the general cooperation algorithm needs to be justified and explained.
9. What’s the main idea and advantages of the data synchronization algorithm?
10. Similar issue also exists for the leader node election algorithm.
11. Competitive comparison methods should be provided in experiments.
12. Important results and findings should be summarized in the conclusion.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Reviewer 3 Report
Comments and Suggestions for AuthorsAbstract part:
Dear Authors,
Manuscript is well-prepared. I have found some minor corrections based on following comments:
(1) Please improve „ The experimental evaluation shows that, compared to the traditional approach, where each tracker sends its location individually, the proposed method al-lows a reduction of the average battery charge required for one position report from 19% to 240% per each cooperating tracker. “ May you compare energy in kWh, 240% is difficult to understand.
(2) Line 60: “Despite great interest and the number of published articles related to the domain [5–9]” please avoid of using lumped references.
(3) Line 243: “23:00 PM” 11 pm?
(4) Line 345 – 350: 3.3V or 3.3 V: please use space between number and unit in whole manuscript
(5) Line 368, 619: Please avoid of using “we”
(6) Figure 7, 8, 9. Please improve the way of showing results. I do not understand number (mC per what?). Please use connection between results and equations (there is lack of equations). If there are results of experiments please add error analyses.
(7) Figure 12. “Figure 12. Summary of energy requirements” per 1 MB or what? If there are results of experiments please add error analyses.
(8) There is lack of equations and parameters in manuscript.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
Comments and Suggestions for AuthorsBased on the author's responses, I consider that the work can be accepted for publication.
Author Response
Dear Reviewer,
Thank you very much for Your valuable comments, that allowed us to improve the article.
Sincerely Yours,
Authors
Reviewer 2 Report
Comments and Suggestions for AuthorsAuthors have well revised this paper. No further comments.
Author Response
Dear Reviewer,
Thank you very much for Your valuable comments, that allowed us to improve the article.
Sincerely Yours,
Authors
