kumoh national institute of technology
Networked Systems Lab.

Ikechi Saviour Igboanusi, Williams-Paul Nwadiugwu, and Dong-Seong Kim, "Energy Efficient Amplify and Forward (AF) Relay Schemes for Industrial Communication Systems", IEEE WFCS Conference, Sundsvall, Sweden, May 27-29, 2019.
By : Igboanusi I. Saviour
Date : 2019-04-30
Views : 297

We are sorry to inform you that the following submission was not selected by the program committee to appear at the WiP of WFCS 2019:

Energy Efficient Amplify and forward (AF) Relay Schemes for Industrial Communication Systems

Due to time and space limitations, we could only choose a subset of the submitted papers to appear on the program.

Nonetheless, I still hope you can attend the conference.

We have enclosed the reviewer comments. We hope these are useful for the continuation of your work.

If you have any additional questions, please feel free to get in touch.

The WFCS 2019 WiP Chairs.
Nuno Pereira, Polytechnic Institute of Porto, Portugal
Tomas Lennvall, Örebro University, Sweden

SUBMISSION: 36
TITLE: Energy Efficient Amplify and forward (AF) Relay Schemes for Industrial Communication Systems


----------------------- REVIEW 1 ---------------------
SUBMISSION: 36
TITLE: Energy Efficient Amplify and forward (AF) Relay Schemes for Industrial Communication Systems
AUTHORS: Ikechi Saviour Igboanusi, Williams-Paul Nwadiugwu and Dong Seong Kim

----------- Overall evaluation -----------
SCORE: -2 (reject)
----------- Review -----------
The authors in this paper outline the model of a forwarding strategy to improve energy efficiency of IWSNs through deferred end-to-end communications. The reviewer has the following comments:

- Although the paper investigates Amplify and Forward approach, the authors did not mention how relayed signals are amplified.
- Why the communication links between the source nodes and the CH are not considering the model?
- The introduction approach may cause a concession on certain relays that are selected by various CHs, which adversely affect both latency and reliability.
- It would be better if the authors provide a clear defintion of the simulation environment.
- Paper presentation and writing need improvements, for instance, simulation figures have poor resolution.



----------------------- REVIEW 2 ---------------------
SUBMISSION: 36
TITLE: Energy Efficient Amplify and forward (AF) Relay Schemes for Industrial Communication Systems
AUTHORS: Ikechi Saviour Igboanusi, Williams-Paul Nwadiugwu and Dong Seong Kim

----------- Overall evaluation -----------
SCORE: 0 (borderline paper)
----------- Review -----------
The paper present an analytical analysis of different AF relay schemes.
The topic presented in the manuscript is relevant for the conference.
I encourage the authors to proof read their manuscript as it contains some typos and sentences of not clear interpretation. Hereafter I report some example:
- They are to monitor and transmit their data to a remote Base Station (BS) such that no Sensor Node (SN) can connect efficiently to it.

- Fig. 1. Represent the Topologies, showing the orientation of source and Destination, and how they interact between themselves in single hop.

I think that in this context location would be a better term to use than orientation.


- with communication range of about 125M
with communication range of about 125m

The main comments on the manuscript follows:
- I do not think it is clear how in the Cooperative scheme described by the authors a CH selects the R to use.
According to eq. (5) and (6) a CH chooses the relay with the highest instantaneous transmission rate to the BS. However, that only depends on the channel gain of the R – BS channel and not on the channel gain of the CH - R channel. If this was the case, wouldnt all CHs select the same Relay? However, the model (shown in Fig. 2) assumes that each CH uses a different Relay. Can the author clarify this point?

- How is the Amplify and Forward (AF) relay scheme affect the model presented in Section II? There is no mention of the AF relay scheme in the manuscript outside of the introduction.

- Why do the CHs not consider the channel gain between themselves and the Relay when selecting the Relay to use? Probably a CH will not have the same channel condition to all the free relays.

- Some of the equations provided in the manuscript lack any explanation or context. I am referring in particular to eq. (15), or the expressions in the box directly above eq. (9)

- I understand that the results presented in section IV originate from simulations. However, I cannot find any comparison with the analytical results, which the simulations are supposed to validate. Moreover, the authors do not explain how the analytical model presented in section II can be used to calculate the optimal transmission power.
Overall, in view of my previous comments I consider this paper borderline for acceptance.