INSUS: Indoor Navigation System Using Unity and Smartphone for User Ambulation Assistance

Round 1

Reviewer 1 Report (Previous Reviewer 1)

NA

 

NA

 

Author Response

Dear Reviewer,
We again appreciate your kindness in reviewing our paper and providing valuable comments. Your insightful and valuable comments help improve the quality of the current version manuscript. All authors have reviewed and agreed to the submission of the revised manuscript. We hope that the revised manuscript meets your high standards.

We provide point-by-point responses in our response letter.
Please see the attached file.
All modifications in the manuscript have been written in yellow.

Best regards,

Evianita Dewi Fajrianti

 

Author Response File: Author Response.pdf

Reviewer 2 Report (Previous Reviewer 2)

Better than before, but the highlights are weird, and there was not indication of the changes w.r.t. the previous version. I would have appreciated at least a summary of the changes.

Overall the paper looks much better than the previous version. I have still some doubts about the overall innovations (beside the clever use of the Unity and ARKit), and about the necessity of a server.

About the server, it would be useful to highlight if it's really necessary, or if it's just useful for debugging and scientific data collection. I believe that the second option is more likely, and the authors should point out if it would be possible to avoid it. This could be particularly useful for buildings where the Internet connectivity is not guaranteed.

Last but not least, a minor English correction: In table 9, the 3rd row should be "Want to use more" - as "anymore" is used for negative sentences (e.g., "do not want to use anymore").

Author Response

Dear Reviewer,
We again appreciate your kindness in reviewing our paper and providing valuable comments. Your insightful and valuable comments help improve the quality of the current version manuscript. All authors have reviewed and agreed to the submission of the revised manuscript. We hope that the revised manuscript meets your high standards.

We provide point-by-point responses in our response letter.
Please see the attached file.
All modifications in the manuscript have been written in yellow.

Best regards,

Evianita Dewi Fajrianti

 

Author Response File: Author Response.pdf

Reviewer 3 Report (New Reviewer)

The paper describes the design and implementation of the Indoor Navigation System using Unity and Smartphone (INSUS). It presents a smartphone-based indoor navigation system that employs virtual locations, SLAM localization, and AR technology for navigation application user interfaces. A validation procedure is considered to demonstrate the ability of the proposed system. The system’s performance was evaluated and compared by conducting tests in two different buildings. Finally, user testing was conducted in both buildings and upon completing the experiment, participants were provided with a questionnaire to evaluate the performance and functionality of the prototype application.

I suggest improving references to your work

Author Response

Dear Reviewer,
We again appreciate your kindness in reviewing our paper and providing valuable comments. Your insightful and valuable comments help improve the quality of the current version manuscript. All authors have reviewed and agreed to the submission of the revised manuscript. We hope that the revised manuscript meets your high standards.

We provide point-by-point responses in our response letter.
Please see the attached file.
All modifications in the manuscript have been written in yellow.

Best regards,

Evianita Dewi Fajrianti

 

Author Response File: Author Response.pdf

This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.

Round 1

Reviewer 1 Report

See the attached file for detailed comments. 

 

Comments for author File: Comments.docx

Reviewer 2 Report

The paper goal might be interesting (to assist the user movements in indoor locations), but the paper does not convey the novelty of the approach.

There are already several products enabling indoor navigation, some "free" (e.g., Google Maps indoor maps), some commercial. The authors do not discuss in what the proposed system is innovative w.r.t. the existing solutions, and what are the benefits of it.

About the location system, the authors' objections to some of the indoor location discovery methods (in particular the wireless signal ones) seems to be inaccurate, as smartphones can act as receivers, so there is no need for additional devices. On the other hand, the requirement of the proposed system to have the smartphone in a upright position seems to be limiting (at best).

Moreover, the authors - correctly - identify the weaknesses of inertial navigation systems, namely the drift over time/space, but then they do not further discuss the accuracy of the implementation on this point.

Last but not least, the authors do not discuss with the due detail what are the functions of the SEMAR server (which, btw, raises several privacy concerns), or the complexity of creating the maps required by the system.

The English is mostly fine, even though it could be perfected. E.g., line 189 "in constructed and constructed facilities.", or line 211 "where it takes longer to determine" (longer than?, missing the comparison term).

Reviewer 3 Report

The paper proposed a developed application of indoor navigation system by focusing on the fact that the virtual navigation method has some advantages over the exiting methods. Generally, the paper is well-presented, the motivation of the research is strong, and a good review of the existing techniques has been presented. In addition, all the components of the framework have been illustrated clearly.