Efficient Dissemination of Safety Messages in Vehicle Ad Hoc Network Environments
Round 1
Reviewer 1 Report
1. what does the PBE on line 72 refer to ? what's the signification ?
2. in the proposed method when two different vehicles belonging to two different clusters detect the same message and generate emergency message to the RSU What is the filtering process in this case ?
3. isn't it possible to receive interference from other external devices ? what is the filtering process in this case if interference can occur ? otherwise how can we make sure that the RSU station only receive message from the vehicles?
4. Did you define at how far in distance should two cluster be to ensure that they can communicate ? because the information relaying should be keep from the clusters to the RSU station, if not can you explain to new reader how it works ?
5. In all the figure illustrating communication between the vehicles and the RSU station we just can see it is one way ( from the vehicles to the RSU ) we wonder how the vehicles will be noticed or informed for potential accident risk or any related safety message ? we can see at fig 1&8
Minor editing of English language required
Author Response
Dear Reviewer,
We would like to sincerely thank you for your attentive indications and good comments. Our paper is partially rewritten and complemented in order to reflect your comments. Please refer to the attached file about the detailed revisions.
Many thanks.
Jaesoo Yoo
Author Response File: 
Author Response.docx
Reviewer 2 Report
The authors propose an efficient safety message dissemination scheme for urban environments with high vehicle mobility and density to mitigate the increased risk of accidents due to factors like an increase in vehicle ownership, congested roads, and global warming. They utilize a cluster management technique to minimize packet loss and propose methods to reduce processing requests and duplicate messages sent to roadside units. The scheme's superior performance is demonstrated in several evaluations, suggesting the enormous potential to enhance road safety in urban environments. This paper's contributions make it a valuable reference for future studies in this area. However, the reviewer has some comments regarding the paper.
In what follows, I report my specific comments:
1.From the general one, the paper's description of the environment in which the proposed scheme is applicable, i.e., urban areas with high traffic density and high mobility (line 49,50), is like what has been described in related works (line 73,75). Also, the proposed paper mentions the use of clusters considering the high mobility of urban vehicles and frequent cluster departures and subscriptions. Though, there is no clear indication of how this factor is measured, and the context of the environment is not sufficiently differentiated to emphasize the unique contribution of the current work compared to previous work since factors such as road capacity, the number of lanes, and the size and type of vehicles also play a role in determining traffic densities and its effect and consequently the study at all.
2.The current paper explains that it utilizes cluster-based safety message dissemination for both vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication scenarios (line 54). The paper mentions that in the proposed scheme, V2I communication operates similarly to cluster-based V2V communication and communication in the proposed scheme is divided into a cluster-based V2I communication technique and RSU scheduling technique (333-334). However, to optimize the network performance, careful consideration must be given to factors such as terrain, obstacles, number of vehicles, number of lanes, and speed limits in the area. The reviewer noted that the paper missed providing basic information regarding the context in which the last significant performance improvement was achieved, ( since the performance of the IEEE 802.11p standard used in VANETs can be affected by various factors and its effectiveness of communication relies on direct line-of-sight (LOS) paths between transmitting and receiving devices without interference).
3. The paper's description of the use of VANET network communication does not specify if the road section discussed is at an intersection or a non-intersection area. The distinction between these two environments is crucial, as the communication requirements and challenges in each scenario significantly differ. By failing to indicate this critical information, the paper's readers are left to make assumptions about the proposed solution's suitability in certain environments. A more detailed explanation of the scenarios in which the suggested plan is applicable, along with any necessary modifications to the approach in an intersection versus non-intersection setting, would strengthen the paper's contribution to the field. It is important for research papers to provide clear and detailed information about their scope and limitations, enabling other researchers to build upon their work accurately. Therefore, the authors should clearly state the specific communication requirements and challenges that VANET might face in intersection and non-intersection areas for the proposed approach to be valid and effective in real-world deployment situations.
4. As a reviewer, that the paper is relatively easy to comprehend, and the method used is up-to-date, incorporating recent advancements in VANET technology. However, the paper could benefit from more in-depth coverage of transportation-related concepts to provide a more comprehensive understanding of the proposed approach.
While the paper delves into the technical aspects of VANET network communication, it lacks an adequate explanation of the transportation component concepts surrounding the proposed solution. It is essential to understand the transportation system's underlying principles, dynamics, limitations, and design philosophies to develop effective and practical solutions. An in-depth explanation of these important concepts can help readers appreciate the proposed solution's relevance and suitability for the transportation domain.To enhance the paper, I recommend the inclusion of additional content explaining pertinent transportation components such as road layouts, traffic management, and driver behavior.
Author Response
Dear Reviewer,
We would like to sincerely thank you for your attentive indications and good comments. Our paper is partially rewritten and complemented in order to reflect your comments. Please refer to the attached file about the detailed revisions.
Many thanks.
Jaesoo Yoo
Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
The contribution in this manuscript is not clear enough. The literature review and summary is insufficient.
The English expression is a bit verbose.
Author Response
Dear Reviewer,
We would like to sincerely thank you for your attentive indications and good comments. Our paper is partially rewritten and complemented in order to reflect your comments. Please refer to the attached file about the detailed revisions.
Many thanks.
Best regards,
Jaesoo Yoo
Author Response File: Author Response.docx
Reviewer 2 Report
The paper under review presents a commendable effort towards tackling the issue at hand. However, it is worthy of note that some of the comments given in the previous review were not addressed in the current work.but the author identifies these as limitations and proposes them as potential areas of future work. It would be interesting to see that if the author addresses well these limitations in their work with more explanation forb further build on the knowledge and insights shared in this paper. Overall, the paper is a strong contribution to the field and provides a good starting point for further research in the future.
Author Response
Dear reviewer,
We would like to sincerely thank you for your attentive and good comments about the proposed method and future work.
In the future work, we will improve our research by referring to your comments.
Many thanks.
Best regards,
Jaesoo Yoo
Author Response File: Author Response.docx
