Relaying strategies and protocol designs for buffer-aided cooperative relaying networks
In this thesis, a new technique named buffer-aided relaying is studied to enhance the performance of wireless relaying networks. In particular, the transmission strategies that can improve diversity gain, maximize the system throughput and reduce the information delay are investigated. First,...
Saved in:
Main Author: | |
---|---|
Other Authors: | |
Format: | Theses and Dissertations |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | http://hdl.handle.net/10356/72099 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-72099 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-720992023-07-04T17:15:56Z Relaying strategies and protocol designs for buffer-aided cooperative relaying networks Luo, Sheng Teh Kah Chan School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems In this thesis, a new technique named buffer-aided relaying is studied to enhance the performance of wireless relaying networks. In particular, the transmission strategies that can improve diversity gain, maximize the system throughput and reduce the information delay are investigated. First, we apply the buffer-aided relaying scheme into a space-shift-keying (SSK) based relaying system and propose a novel link adaptation method. The average symbol-error performance of the proposed link adaptation scheme is investigated and it is shown that the proposed scheme can achieve a diversity order of 2. In addition, the delay of the information packets at the relay node (RN) is investigated and two link adaptation schemes with reduced delay are proposed. It is shown that by jointly considering the buffer state, the proposed link adaptation schemes can achieve a relative small packet delay at the expense of a little performance loss. Subsequently, a buffer-state based relay selection scheme is proposed for a buffer-aided multiple RNs system to reduce the average delay. Different from the existing relay selection schemes which select the RNs only based on the channel quality, our proposed relay selection scheme selects a RN based on both the channel quality and the bu er state of the RNs. The outage probability of the proposed relay selection scheme is obtained in a closed-form expression and it is shown that the proposed relay election scheme can outperform the existing relay selection schemes. In addition, analytical results also show that our proposed relay selection scheme has lower average packet delay as compared with the existing bu er-aided relay selection schemes. Moreover, the application of the buffer-aided relaying scheme in a wireless-powered relaying system is also investigated. By assuming that the RNs of the system have no embedded power supply and are charged by the radio frequency (RF) signal transmitted by a power beacon (PB), a joint node-and-mode selection scheme is proposed. For the general system setup, some analytical results are obtained which provide useful insights in finding the optimal joint node-and-mode selection scheme. Following this, theoretical analysis is conducted for two specific systems, namely the single RN system and the multiple RNs system with a symmetric channel. For these system setups, the system throughput is obtained in closed-form expressions. Numerical results show that the system throughput can be improved by using the proposed transmission schemes. Finally, we extend the bu er model into a wireless-powered cooperative communication network (WPCCN) and treat the battery of the SN as an energy queue. Based on this model, we investigate the long-term throughput of two proposed block-wise cooperative protocols, namely the block-wise harvest-and-transmit (BW-HaT) protocol and the block-wise mode adaptation (BW-MA) protocol. For the BW-HaT protocol, the throughput expression is obtained in closed form. For the BW-MA protocol, the optimal mode adaptation method that maximizes the throughput of the system is presented and the maximum throughput is given for different system setups. It is shown that the proposed transmission schemes can significantly increase the system throughput. Doctor of Philosophy 2017-05-25T04:19:03Z 2017-05-25T04:19:03Z 2017 Thesis Luo, S. (2017). Relaying strategies and protocol designs for buffer-aided cooperative relaying networks. Doctoral thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/72099 10.32657/10356/72099 en 230 p. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems |
spellingShingle |
DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems Luo, Sheng Relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
description |
In this thesis, a new technique named buffer-aided relaying is studied to enhance the
performance of wireless relaying networks. In particular, the transmission strategies
that can improve diversity gain, maximize the system throughput and reduce the
information delay are investigated.
First, we apply the buffer-aided relaying scheme into a space-shift-keying (SSK)
based relaying system and propose a novel link adaptation method. The average
symbol-error performance of the proposed link adaptation scheme is investigated and
it is shown that the proposed scheme can achieve a diversity order of 2. In addition,
the delay of the information packets at the relay node (RN) is investigated and two
link adaptation schemes with reduced delay are proposed. It is shown that by jointly
considering the buffer state, the proposed link adaptation schemes can achieve a
relative small packet delay at the expense of a little performance loss.
Subsequently, a buffer-state based relay selection scheme is proposed for a buffer-aided
multiple RNs system to reduce the average delay. Different from the existing
relay selection schemes which select the RNs only based on the channel quality, our
proposed relay selection scheme selects a RN based on both the channel quality and
the bu er state of the RNs. The outage probability of the proposed relay selection
scheme is obtained in a closed-form expression and it is shown that the proposed relay election scheme can outperform the existing relay selection schemes. In addition,
analytical results also show that our proposed relay selection scheme has lower average
packet delay as compared with the existing bu er-aided relay selection schemes.
Moreover, the application of the buffer-aided relaying scheme in a wireless-powered
relaying system is also investigated. By assuming that the RNs of the system have no
embedded power supply and are charged by the radio frequency (RF) signal transmitted
by a power beacon (PB), a joint node-and-mode selection scheme is proposed.
For the general system setup, some analytical results are obtained which provide useful
insights in finding the optimal joint node-and-mode selection scheme. Following
this, theoretical analysis is conducted for two specific systems, namely the single RN
system and the multiple RNs system with a symmetric channel. For these system
setups, the system throughput is obtained in closed-form expressions. Numerical
results show that the system throughput can be improved by using the proposed
transmission schemes.
Finally, we extend the bu er model into a wireless-powered cooperative communication
network (WPCCN) and treat the battery of the SN as an energy queue. Based
on this model, we investigate the long-term throughput of two proposed block-wise cooperative
protocols, namely the block-wise harvest-and-transmit (BW-HaT) protocol
and the block-wise mode adaptation (BW-MA) protocol. For the BW-HaT protocol,
the throughput expression is obtained in closed form. For the BW-MA protocol, the
optimal mode adaptation method that maximizes the throughput of the system is
presented and the maximum throughput is given for different system setups. It is
shown that the proposed transmission schemes can significantly increase the system
throughput. |
author2 |
Teh Kah Chan |
author_facet |
Teh Kah Chan Luo, Sheng |
format |
Theses and Dissertations |
author |
Luo, Sheng |
author_sort |
Luo, Sheng |
title |
Relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
title_short |
Relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
title_full |
Relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
title_fullStr |
Relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
title_full_unstemmed |
Relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
title_sort |
relaying strategies and protocol designs for buffer-aided cooperative relaying networks |
publishDate |
2017 |
url |
http://hdl.handle.net/10356/72099 |
_version_ |
1772828091880570880 |