Results 231 to 240 of about 224,400 (269)

Max-Max Relay Selection for Relays with Buffers

IEEE Transactions on Wireless Communications, 2012
In this paper, we propose a new relay selection scheme for half-duplex relays with buffers. The proposed scheme is referred to as max-max relay selection (MMRS) since the relays with the best source-relay and the best relay-destination channels are selected for reception and transmission, respectively, which is only possible without data loss if the ...
Aissa Ikhlef, Diomidis S. Michalopoulos, Robert Schober   +2 more
openaire   +1 more source

Relay selection strategy for parallel relayed FSO systems

2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017
This paper describes a coherent tree-space optical (FSO) communication system consisting of multiple parallel relays and two terminal nodes. When direct communication between the two terminal nodes of the network is not possible, one relay is selected to establish a dual-hop communication link between them.
Parul Puri, Parul Garg
openaire   +1 more source

Bidirectional regenerative half-duplex relaying using relay selection

IEEE Transactions on Wireless Communications, 2008
We consider the problem of relay selection in a network with N relay nodes. A half-duplex relay node enables bidirectional communication between two nodes with a spectrally efficient two-phase protocol. In the first phase both nodes transmit their messages to a relay node, which decodes the messages and broadcasts a composition using superposition ...
Tobias Oechtering, Holger Boche
openaire   +1 more source

Power versus relay selection in adaptive relay networks

2010 7th International Symposium on Wireless Communication Systems, 2010
Adaptive relaying schemes significantly improve the performance of relay networks by switching the forwarding technique according to the reliability of the received signal. Moreover, efficient resource allocation is vital for meliorating the relay network performance.
Aimal Khan, Volker Kuhn
openaire   +1 more source

Outdated Relay Selection in Two-Way Relay Network

IEEE Transactions on Vehicular Technology, 2013
In this paper, we consider a two-way relay network (TWRN) with multiple amplify-and-forward (AF) relays, out of which the best one is selected to assist the data communication between two sources. The relay selection is based on the outdated channel state information (CSI), and we study its effect on the system performance in the independent but not ...
null Lisheng Fan, null Xianfu Lei, Rose Qingyang Hu, Winston Seah   +3 more
openaire   +1 more source

Relay-aided cooperative Underwater acoustic communications: Selective relaying

2012 Oceans - Yeosu, 2012
Underwater acoustic communications (UAC) features frequency-dependent signal attenuation, long propagation delay, and doubly-selective fading. Thus, the design of reliable and efficient UAC protocols is very challenging. On the other hand, cooperative relay communications, which can provide reliable data transmission, is a very attractive technology ...
Xilin Cheng, Rui Cao, Fengzhong Qu, Liuqing Yang   +3 more
openaire   +1 more source

Joint relay‐pair selection for buffer‐aided successive opportunistic relaying

Transactions on Emerging Telecommunications Technologies, 2013
ABSTRACTIn this work, we present a buffer‐aided successive opportunistic relaying scheme that aims at improving the average capacity of the network when inter‐relay interference arises between relays that are selected for simultaneous transmission and reception.
Nomikos, N., Vouyioukas, D., Charalambous, T., Krikidis, Ioannis A., Makris, P., Skoutas, D. N., Johansson, M., Skianis, C., Nomikos, N., Vouyioukas, D., Charalambous, T., Krikidis, Ioannis A., Makris, P., Skoutas, D. N., Johansson, M., Skianis, C.   +15 more
openaire   +2 more sources

Relay selection in amplify-and-forward relay networks with frequency selective fading

2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2012
We consider relay selection in cooperative relay networks with frequency selective fading, and focus on a system where multiple amplify-and-forward relays share a single channel orthogonal to the source. We propose a relay selection method that achieves the optimal diversity-multiplexing tradeoff (DMT) as proven by outage analysis. This relay selection
Qingxiong Deng, Andrew G. Klein
openaire   +1 more source

Relays selection with power allocation in relay networks

2015 4th International Conference on Computer Science and Network Technology (ICCSNT), 2015
Recently, the cooperative wireless communication system is attracting attention as 4G and beyond 4G techniques. Transmit rate and diversity are generally enhanced in MIMO systems, however, mobile devices are limited by size or hardware complexity to set many multi-antennas.
openaire   +1 more source

Joint Relay Selection and Relay Ordering for DF-Based Cooperative Relay Networks

IEEE Transactions on Communications, 2012
Relay selection (RS) has widely been studied for both decode-and-forward (DF) and amplify-and-forward (AF) protocols, and relay ordering (RO) was recently proposed for the AF protocol only . The two strategies, RS and RO, have been individually shown to be very effective to enhance the performance of cooperative relay networks. In this letter, we first
MinChul Ju, Il-Min Kim, Dong In Kim
openaire   +1 more source