Concurrent Operation of Half- and Full-Duplex Terminals in Future Multi-Hop FDD Based Cellular Networks

Schoenen, Rainer; Otyakmaz, A.; Walke, Bernhard

doi:10.1109/wicom.2008.72

Cited by 10 publications

(8 citation statements)

References 10 publications

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“…• HD modes may be more attractive from the perspective of low-complexity practical implementation [32]. Again, an FD scheme may not always outperform its HD counterpart in all scenarios, hence a hybrid HD/FD scheme may be proposed to gain an advantage over either of the individual schemes.…”

Section: Benefits Of Employing Full-duplex Operationsmentioning

confidence: 99%

“…2008 Schoenen et al [32] Shows that the HD mode with sophisticated protocol design may also be attractive from the perspective of practical implementation.…”

Section: Lowmentioning

confidence: 99%

“…Dynamic hybrid resource allocation policies can thus be developed for both the FD and HD modes for maximizing the network's throughput under diverse QoS requirements. However, the careful coordination of HD and FD operations constitutes a challenge [32], [111]. Specifically, as found in [32], the HD operation tends to reduce the user-fairness, potentially leading to an unstable operating point in terms of resource scheduling, when more and more terminals have to be admitted.…”

Section: Highmentioning

confidence: 99%

“…However, the careful coordination of HD and FD operations constitutes a challenge [32], [111]. Specifically, as found in [32], the HD operation tends to reduce the user-fairness, potentially leading to an unstable operating point in terms of resource scheduling, when more and more terminals have to be admitted. To address the above-mentioned issues, specific resource allocation/scheduling mechanisms can be implemented for facilitating an effective hybrid HD/FD mode to satisfy diverse QoS requirements, such as…”

Section: Highmentioning

confidence: 99%

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Full-Duplex Wireless Communications: Challenges, Solutions, and Future Research Directions

et al. 2016

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Abstract-The family of conventional half-duplex (HD) wireless systems relied on transmitting and receiving in different time-slots or frequency sub-bands. Hence the wireless research community aspires to conceive full-duplex (FD) operation for supporting concurrent transmission and reception in a single time/frequency channel, which would improve the attainable spectral efficiency by a factor of two. The main challenge encountered in implementing an FD wireless device is the large power difference between the self-interference (SI) imposed by the device's own transmissions and the signal of interest received from a remote source. In this survey, we present a comprehensive list of the potential FD techniques and highlight their pros and cons. We classify the SI cancellation techniques into three categories, namely passive suppression, analog cancellation and digital cancellation, with the advantages and disadvantages of each technique compared. Specifically, we analyze the main impairments (e.g. phase noise, power amplifier nonlinearity as well as in-phase and quadrature-phase (I/Q) imbalance, etc.) that degrading the SI cancellation. We then discuss the FD based Media Access Control (MAC)-layer protocol design for the sake of addressing some of the critical issues, such as the problem of hidden terminals, the resultant end-to-end delay and the high packet loss ratio (PLR) due to network congestion. After elaborating on a variety of physical/MAC-layer techniques, we discuss potential solutions conceived for meeting the challenges imposed by the aforementioned techniques. Furthermore, we also discuss a range of critical issues related to the im-

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Section: Benefits Of Employing Full-duplex Operationsmentioning

confidence: 99%

“…2008 Schoenen et al [32] Shows that the HD mode with sophisticated protocol design may also be attractive from the perspective of practical implementation.…”

Section: Lowmentioning

confidence: 99%

Section: Highmentioning

confidence: 99%

Section: Highmentioning

confidence: 99%

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Full-Duplex Wireless Communications: Challenges, Solutions, and Future Research Directions

et al. 2016

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“…For the relay-enhanced scheme proposed in [42], a potential improvement in proportional fairness sense can be realized through the clustering (in-cell routing) criterion of UTs, which aims as well at maximizing the proportional fairness metric. PFS has also been implemented in [43] considering both halfand full-duplex UTs in a multihop frequency-division duplexing (FDD) network. However, due mainly to the inherent lack of queue awareness in the PFS besides the suboptimal extension strategy, the relay-enhanced scheme proposed in [19] is shown to provide more fairness in the throughput rate sense.…”

Section: Extending Conventional Scheduling Algorithms To Cellularmentioning

confidence: 99%

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Salem

Adinoyi²,

Yanıkömeroğlu

et al. 2010

IEEE Trans. Veh. Technol.

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Abstract-The opportunities and flexibility in relay networks and orthogonal frequency-division multiple access (OFDMA) make the combination a suitable candidate network and air-interface technology for providing reliable and ubiquitous high-data-rate coverage in next-generation cellular networks. Advanced and intelligent radio resource management (RRM) schemes are known to be crucial toward harnessing these opportunities in future OFDMA-based relay-enhanced cellular networks. However, it is not very clear how to address the new RRM challenges (such as enabling distributed algorithms, intra-cell/inter-cell routing, intense and dynamic co-channel interference (CCI), and feedback overhead) in such complex environments comprising a plethora of relay stations (RSs) of different functionalities and characteristics. Employment of conventional RRM schemes in such networks will highly be inefficient if not infeasible. The next-generation networks are required to meet the expectations of all wireless users, irrespective of their locations. High-data-rate connectivity, mobility, and reliability, among other features, are examples of these expectations. Therefore, fairness is a critical performance aspect that has to be taken into account in the design of prospective RRM schemes. This paper reviews some of the prominent challenges involved in migrating from the conventional cellular architecture to the relay-based type and discusses how intelligent RRM schemes can exploit the opportunities in relay-enhanced OFDMA-based cellular networks. We identify the role of multiantenna systems and explore the current approaches in literature to extend the conventional schedulers to next-generation relay networks. This paper also highlights the fairness aspect in such networks in the light of the recent literature, provides some example fairness metrics, and compares the performances of some representative algorithms.

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Gender Assignment for Directional Full-Duplex FDD Nodes in a Multihop Wireless Network

et al. 2016

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The frequency-division duplex (FDD) nodes use two separate frequency bands (separated by a guard band) for transmission and reception, thus enabling the full-duplex (FD) communication. On the other hand, the use of directional FDD nodes in multihop wireless network offers the advantages of larger transmission range, better link reliability, and spatial reuse, resulting in a much higher throughput and superior interference mitigation. However, the multihop FDD communication partitions the nodes in two classes (or genders) wherein the nodes of the same class (or gender) in a neighborhood cannot communicate with each other. This can seriously impact the availability of neighboring nodes for communication, and lead to disconnected nodes (or regions) in the network. In this paper, an algorithm is presented to assign the appropriate genders to these nodes in a multi-hop network such that each node is able to communicate with its multiple 1-hop neighbors, located in different directions. Our simulation results demonstrate that approximately half of the neighbors of each node are of the opposite gender and they are distributed in different directions, thus enabling robust, multipath, and high throughput communication in the network. Keywords: Frequency Division Duplex (FDD) • Full-duplex communication • Gender assignment • Frequency assignment • Directional antenna • Graph coloring • Multihop network

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Concurrent Operation of Half- and Full-Duplex Terminals in Future Multi-Hop FDD Based Cellular Networks

Cited by 10 publications

References 10 publications

Full-Duplex Wireless Communications: Challenges, Solutions, and Future Research Directions

Full-Duplex Wireless Communications: Challenges, Solutions, and Future Research Directions

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Gender Assignment for Directional Full-Duplex FDD Nodes in a Multihop Wireless Network

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