A simple Cooperative diversity method based on network path selection

By Aggelos Bletsas, Ashish J. Khisti, David P. Reed, A. Lippman. IEEE Journal on Selected Areas in Communications, 2005

3,167 citations recorded by the source corpus.

Cooperative diversity has been recently proposed as a way to form virtual antenna arrays that provide dramatic gains in slow fading wireless environments. However, most of the proposed solutions require distributed space-time coding algorithms, the careful design of which is left for future investigation if there is more than one cooperative relay. We propose a novel scheme that alleviates these problems and provides diversity gains on the order of the number of relays in the network. Our scheme first selects the best relay from a set of M available relays and then uses this "best" relay for cooperation between the source and the destination. We develop and analyze a distributed method to select the best relay that requires no topology information and is based on local measurements of the instantaneous channel conditions. This method also requires no explicit communication among the relays. The success (or failure) to select the best available path depends on the statistics of the wireless channel, and a methodology to evaluate performance for any kind of wireless channel statistics, is provided. Information theoretic analysis of outage probability shows that our scheme achieves the same diversity-multiplexing tradeoff as achieved by more complex protocols, where coordination and distributed space-time coding for M relay nodes is required, such as those proposed by Laneman and Wornell (2003). The simplicity of the technique allows for immediate implementation in existing radio hardware and its adoption could provide for improved flexibility, reliability, and efficiency in future 4G wireless systems.

Subfields: Computer Networks and Communications

View Paper: https://www.semanticscholar.org/paper/f37d6349b84faa0bf2a01025221f0f79ef5c61ff

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computer Networks and Communications

Citations in the corpus

Buffer-Aided Relay Selection for Cooperative Diversity Systems without Delay Constraints (2012, background): “It is worth noting that our focus is to investigate the performance of a new buffer-aided relay selection scheme under the global CSI assumption and hence, the implementation issues (i.e., distributed implementations [2], CSI acquisition, etc.) are beyond the scope of this paper.”
Optimal Relay Selection for Physical-Layer Security in Cooperative Wireless Networks (2013, methodology): “Moreover, if the eavesdropper’s CSI is unknown, we can consider the use of traditional relay selection [20][22] which does not require the CSI of wiretap links.”
Full-Duplex Relay Selection for Amplify-and-Forward Cooperative Networks (2012, background): “(32)”
Outage Probability of Cognitive Relay Networks with Interference Constraints (2011, background): “Hence, a relay selection criterion in conventional relay networks is defined as follows [16], [17]:”
Relay Architectures for 3GPP LTE-Advanced (2009, background): “One solution to improve coverage is the use of fixed relays, pieces of infrastructure without a wired backhaul connection, that relay messages between the base station (BS) and mobile stations (MSs) through multihop communication [3–11].”
Energy-Efficient Cooperative Communication Based on Power Control and Selective Single-Relay in Wireless Sensor Networks (2008, methodology): “However, most existing results on selective cooperation schemes focus on the multiplexingdiversity tradeoff analysis, where a fixed power level is assumed at the source and relays [10].”
Max-Max Relay Selection for Relays with Buffers (2012, methodology): “In multi-relay networks [1], where a number of relays assist a source in transmitting information to a destination, relay selection schemes are attractive due to their high performance, efficient use of power and bandwidth resources, and simplicity of implementation [2].”
Amplify-and-forward with partial relay selection (2008, neutral): “In [3], Bletsas et al.”
Performance Analysis of Cooperative Diversity Wireless Networks over Nakagami-m Fading Channel (2007, background): “, [8], [9]) and it is shown to be accurate enough at medium and high SNR values as will be discussed in the results section.”
Harvest-Then-Cooperate: Wireless-Powered Cooperative Communications (2014, background): “Opportunistic relaying3 (OR) [29] and partial relay selection (PRS) [30], [31] are two representative relay selection schemes that were proposed for the AF relaying.”
Voluntary Energy Harvesting Relays and Selection in Cooperative Wireless Networks (2010, background): “When multiple nodes are present, several cooperation schemes select the relay with the best instantaneous channel state [3], [7], [8], where the specifics of the cooperation protocol determine what ‘best’ means.”
Cooperative Communications with Outage-Optimal Opportunistic Relaying (2007, methodology): “For quasi-static fading environments, a simple method can be devised to select the relay with the maximum channel strength γbreact-DaFD in a distributed manner similar to the work in [19] and [22].”
Improving amplify-and-forward relay networks: optimal power allocation versus selection (2006, background): “Furthermore, their selection process may fail due to packet collision and the analysis in [12] quantifies the probability of collisions.”
Energy-Efficient Cooperative Relaying over Fading Channels with Simple Relay Selection (2008, methodology): “Its importance was recognized in [16], which proposed relay selection metrics that took both link states into account.”
Selection cooperation in multi-source cooperative networks (2008, methodology): “To the best of our knowledge, the only other direct application of selection to cooperative diversity systems has been proposed in independent works by Bletsas et al. [14], [15].”
Non-Coherent Code Acquisition in the Multiple Transmit/Multiple Receive Antenna Aided Single- and Multi-Carrier DS-CDMA Downlink (2007, background): “A selection scheme over cooperative networks has been introduced by Bletsas et al. [ 12 ].”
Performance analysis of single relay selection in rayleigh fading (2008, methodology): “In [1], the authors proposed the OR method, showing that the diversity-multiplexing tradeoff of OR is identical with that of the distributed space-time coding (DSTC) systems [6].”
Multiple-Antenna Cooperative Wireless Systems: A Diversity–Multiplexing Tradeoff Perspective (2007, background): “Similarly, [6], [39], [48], [49] upper-bound the system behavior by MISO or SIMO DMT if all links have Rayleigh fading.”