Cognitive Spectrum Sharing With Two-Way Relaying Systems

Li, Qiang; Ting, See Ho; Pandharipande, Ashish; Han, Yinghua

doi:10.1109/tvt.2010.2104334

Cited by 123 publications

(84 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, two-way relaying (TWR) technique has drawn a lot of attention due to fully compensating this loss by permitting two users concurrently transmit its signal to each other with the help of half-duplex relays [6]. Despite getting higher spectral efficiency than the traditional cognitive one-way relay networks, only few works investigated the performance of twoway counterpart [7][8][9][10][11][12]. The performance of two-way relaying with single and multiple relays has been reported in [7] and [9], respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Despite getting higher spectral efficiency than the traditional cognitive one-way relay networks, only few works investigated the performance of twoway counterpart [7][8][9][10][11][12]. The performance of two-way relaying with single and multiple relays has been reported in [7] and [9], respectively. In [9], the exact outage probability of opportunistic two-way relaying with spectrum-sharing has been presented.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cooperative Spectrum-Sharing with Two-Way AF Relaying in the Presence of Direct Communications

Thanh¹,

Hoang²

2018

EAI Endorsed Transactions on Industrial Networks and Intelligen

View full text Add to dashboard Cite

In this paper, we investigate a three-phase two-way (TW) amplify-and-forward (AF) relaying for cognitive radio networks. By utilizing the direct communications, the end user can employ diversity combining techniques, i.e., maximal ratio combining (MRC) and selection combining (SC), to achieve the full diversity. We derive the closed-form and asymptotic expressions for user and system outage probabilities which allows us to highlight the advantage of cooperative cognitive communications. The numerical results, obtained through compact forms of these outage probabilities, yield that the cognitive TW AF relaying scheme can significantly enhance the reliability of unlicensed networks in which the transmit power at secondary users is strictly governed.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cooperative Spectrum-Sharing with Two-Way AF Relaying in the Presence of Direct Communications

Thanh¹,

Hoang²

2018

EAI Endorsed Transactions on Industrial Networks and Intelligen

View full text Add to dashboard Cite

show abstract

“…A three-phase cognitive two-way relaying scenario has been analyzed in [12], and three different two-hop relaying protocols according to the amount of a prior knowledge have been investigated in [13]. Cognitive radio networks with opportunistic DF and uncoded DF-relaying schemes were considered and analyzed in [14].…”

Section: Introductionmentioning

confidence: 99%

Outage performance of relay-assisted primary and secondary transmissions in cognitive relay networks

Zhao

Sun

Chen

et al. 2014

J Wireless Com Network

View full text Add to dashboard Cite

In this paper, a two-phase protocol for relay-assisted spectrum sharing in cognitive relay network is proposed. The primary system comprises a transmitter-receiver pair (PT-PR) and a decode-and-forward relay (Relay), while the secondary system comprises a transmitter-receiver pair (ST-SR). In the proposed protocol, the Relay assists the transmissions of the primary users as well as the secondary users where there is no direct link between the ST and the SR. Outage probabilities of the primary system and the secondary system are derived and verified through simulations. Compared with the protocol without cooperation, better outage performance of the primary system is achieved. Meanwhile, though the ST causes interference to the PR, the interference is compensated by the cooperation of the Relay. Moreover, the proposed protocol realizes the communications of the secondary users on the condition that the secondary transmission link is not ideal.

show abstract

“…In the interweaved spectrum sharing scheme, http://jwcn.eurasipjournals.com/content/2013/1/70 cognitive radio networks. Most of the existing works on the combined topic focus on solving the problems in the physical layer [4][5][6][7][8][9][10], such as the enhancement of the sensing ability for the SU and the improvement of the outage and error performances for both the PU and SU. When delay-sensitive applications are considered, other performance metrics about the maximum stable throughput and the average end-to-end delay become critical.…”

Section: Introductionmentioning

confidence: 99%

Protocol design and performance analysis for cognitive cooperative networks with multiple antennas

Huang

Wang

et al. 2013

J Wireless Com Network

View full text Add to dashboard Cite

In this article, we deal with a novel access protocol design for cognitive cooperative networks with multiple antennas. According to the principles of cognitive radio, the secondary user (SU) can exploit the primary user (PU) burstiness to access the licensed spectrum in the proposed access protocol. To get more access opportunities to the licensed spectrum, the SU simultaneously relays the PU's packets and transmits its own packets based on the superposition coding. Furthermore, to concurrent transmission of the PU's packets and SU's packets based on the superposition coding such that they are received without the interference at the primary receiver and secondary receiver respectively, two weight vectors at the SU equipped with multiple antennas are designed based on zero-forcing algorithm. Specifically, from a networking perspective, we analyze the performance of the proposed access protocol in terms of the maximum stable throughput and the average end-to-end delay for both the PU and SU based on the principles of queueing theory. In addition, to protect the PU's performance and exhibit the advantage of adopting multiple antenna technology, we jointly optimize the parameter of superposition coding and the number of antennas, and define the maximum stable throughput cooperative gain compared to the non-cooperative access scheme. More importantly, the impact of imperfect channel state information (CSI) at the SU on the maximum stable throughput and the average end-to-end delay performance is evaluated in the simulations from a practical point of view. Analysis and simulation results demonstrate that the proposed access protocol achieves significant performance gains for both the PU and the SU, outperforms the existing cooperative access protocol based on the dirty-paper coding, and keeps robust against to the imperfect CSI.

show abstract

Cognitive Spectrum Sharing With Two-Way Relaying Systems

Cited by 123 publications

References 14 publications

Cooperative Spectrum-Sharing with Two-Way AF Relaying in the Presence of Direct Communications

Cooperative Spectrum-Sharing with Two-Way AF Relaying in the Presence of Direct Communications

Outage performance of relay-assisted primary and secondary transmissions in cognitive relay networks

Protocol design and performance analysis for cognitive cooperative networks with multiple antennas

Contact Info

Product

Resources

About