Resource-Efficient Parallelized Random Access for Reliable Connection Establishment in Cellular IoT Networks

Round 1

Reviewer 1 Report

This paper proposed a resource-efficient parallelized random access procedure (RePRA) in cellular IoT networks. 

The paper is well organized and the topic is timely. 

The paper also shows a novelty compared to the authors's previous study.

In particular, the proposed technique provides a better connection establishment performance as the number of connection-requesting IoT devices per PRACH increases, which will be useful in terms of achieving massive connectivity in the era of Industry 4.0.

The reviewer can recommend this article to be published after reflecting the following minor comments:

 

1) In the introduction, the contributions of this paper should be itemized.

2) For potential readers, the reviewer recommends to add a short paragraph which provides a brief summary of the random access parallelization technique.

3) The proposed technique in this manuscript is definitely different from the previous paper. However, readers may be confused on the novelty on this manuscript. Please briefly discuss this in the introduction.

So, the reviewer recommends the authors to state the novelty and emphasize difference once again in the newly inserted section.

4) DOI information is missing in some references (13, 16).

5) In Step 2 of Section 3.4, there is an error in referring a Section number. 

6) In Step 4 of Section 3.4, 'Contention' in the title should be 'contention' (lower case).

7) It would be better if all figures are located before the references.

Author Response

Dear Editor and Reviewers,
We express our utmost appreciation for the constructive criticism, invaluable comments, and recommendation given on our work. We have done our best to reflect all the concerns addressed in the review.  Please refer to the revised manuscript and attached reply letter.

Sincerely yours,
Authors

Author Response File: Author Response.pdf

Reviewer 2 Report

The authors have proposed a resource-efficient parallelized random access technique, ensuring reliable connection establishment in cellular-based massive IoT networks. The authors reviewed the relevant research works. On that basis, the research problem was formulated. The proposed approach is well described in the paper. The performance of the proposed techniques was verified experimentally. The obtained results were also compared with those obtained by other approaches. The carried out experiments indicated that the proposed technique improves the efficiency of radio resource usage and connection establishment success probability. Please address the following issues: 1. Is the proposed technique general enough to be used in other usage scenarios? 2. Are the results presented from multiple experiments? If so, their statistical analysis should also be presented. 3. Please improve the English language, especially grammar and style.

 

Author Response

Dear Editor and Reviewers,
We express our utmost appreciation for the constructive criticism, invaluable comments, and recommendation given on our work. We have done our best to reflect all the concerns addressed in the review.  Please refer to the revised manuscript and attached reply letter.

Sincerely yours,
Authors

Author Response File: Author Response.pdf

Reviewer 3 Report

The subject matter of the manuscript is interesting. However, I have the following comments on the content.

 

- the Literature Review section is missing;

- the justification of the proposed methodology is missing;

- Section 2. The model is too general;

- information about the tool used for the summation is missing;

Author Response

Dear Editor and Reviewers,
We express our utmost appreciation for the constructive criticism, invaluable comments, and recommendation given on our work. We have done our best to reflect all the concerns addressed in the review.  Please refer to the revised manuscript and attached reply letter.

Sincerely yours,
Authors

Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

The explanations and additions made by the Authors are satisfactory.