HyDRA: A hypervisor for software defined radios to enable radio virtualization in mobile networks

Kist, Maicon; Rochol, Juergen; DaSilva, Luiz A.; Both, Cristiano Bonato

doi:10.1109/infcomw.2017.8116510

Cited by 12 publications

(16 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the proposed architecture (see Figure 4), OFDM modulation is now executed by the wireless hypervisor, which efficiently multiplexes the baseband signal of several vPHYs into a single wide baseband signal. By removing and transferring the OFDM modulation of all PHYs to the hypervisor, we optimize the whole baseband processing performance by avoiding redundant/unnecessary, for example FFT and IFFT, operations that would be required to multiplex several concurrent regular PHY signals into a wide baseband signal [21][22][23]. The down-side of our approach is that it can only operate with multi-carrier-based (i.e., OFDM) signals.…”

Section: Discussionmentioning

confidence: 99%

“…This is possible due to the fact that Wi-Fi is a packet-based wireless network, where access points do not transmit data all the time, and therefore, being able to allow virtual Wi-Fi radio stacks to use its idle time. The frequency-multiplexing approaches can be further divided into two sub-categories based on the type of the virtualized resource, which can be the spectrum bandwidth through the virtualization of the RF front-end [21][22][23]27,43] or the time-frequency resource grid through the virtualization of the resource blocks (RB) provided by Orthogonal Frequency-Division Multiple Access (OFDMA)-based radio technologies such as LTE and WiMax [44][45][46][47].…”

Section: Related Workmentioning

confidence: 99%

“…Out of all the compared related works, only a few are technology agnostic, i.e., can provide virtual radios to any RAT [21][22][23]27,43]. However, the issue with these works is that they exchange optimized performance for being generalized so that they can operate with different RATs.…”

Section: Related Workmentioning

confidence: 99%

See 2 more Smart Citations

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

Figueiredo

Mennes

Jabandzic

et al. 2020

Sensors

View full text Add to dashboard Cite

The next generation of wireless and mobile networks will have to handle a significant increase in traffic load compared to the current ones. This situation calls for novel ways to increase the spectral efficiency. Therefore, in this paper, we propose a wireless spectrum hypervisor architecture that abstracts a radio frequency (RF) front-end into a configurable number of virtual RF front ends. The proposed architecture has the ability to enable flexible spectrum access in existing wireless and mobile networks, which is a challenging task due to the limited spectrum programmability, i.e., the capability a system has to change the spectral properties of a given signal to fit an arbitrary frequency allocation. The proposed architecture is a non-intrusive and highly optimized wireless hypervisor that multiplexes the signals of several different and concurrent multi-carrier-based radio access technologies with numerologies that are multiple integers of one another, which are also referred in our work as radio access technologies with correlated numerology. For example, the proposed architecture can multiplex the signals of several Wi-Fi access points, several LTE base stations, several WiMAX base stations, etc. As it able to multiplex the signals of radio access technologies with correlated numerology, it can, for instance, multiplex the signals of LTE, 5G-NR and NB-IoT base stations. It abstracts a radio frequency front-end into a configurable number of virtual RF front ends, making it possible for such different technologies to share the same RF front-end and consequently reduce the costs and increasing the spectral efficiency by employing densification, once several networks share the same infrastructure or by dynamically accessing free chunks of spectrum. Therefore, the main goal of the proposed approach is to improve spectral efficiency by efficiently using vacant gaps in congested spectrum bandwidths or adopting network densification through infrastructure sharing. We demonstrate mathematically how our proposed approach works and present several simulation results proving its functionality and efficiency. Additionally, we designed and implemented an open-source and free proof of concept prototype of the proposed architecture, which can be used by researchers and developers to run experiments or extend the concept to other applications. We present several experimental results used to validate the proposed prototype. We demonstrate that the prototype can easily handle up to 12 concurrent physical layers.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

Figueiredo

Mennes

Jabandzic

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…A few hypervisors have been developed specifically for wireless networks, such as Spectrum Virtualization Layer (SVL), MySVL, and HyDRA [10,17]. Such hypervisors generally allow samples coming from multiple radio networks to be combined and transmitted by a single radio front end, the reverse process happening in the receiving path.…”

Section: Software Defined Radiomentioning

confidence: 99%

“…When splitting a signal into two separate parts in the frequency domain, filters need to be carefully designed, and various synchronization issues need to be resolved in case the two parts are transmitted by different radio devices. These kinds of challenges are tackled by HyDRA [10].…”

Section: Software Defined Radiomentioning

confidence: 99%

Enabling Virtual Radio Functions on Software Defined Radio for Future Wireless Networks

Liu

Santos

Belt

et al. 2020

Wireless Pers Commun

View full text Add to dashboard Cite

Today's wired networks have become highly flexible, thanks to the fact that an increasing number of functionalities are realized by software rather than dedicated hardware. This trend is still in its early stages for wireless networks, but it has the potential to improve the network's flexibility and resource utilization regarding both the abundant computational resources and the scarce radio spectrum resources. In this work we provide an overview of the enabling technologies for network reconfiguration, such as Network Function Virtualization, Software Defined Networking, and Software Defined Radio. We review frequently used terminology such as softwarization, virtualization, and orchestration, and how these concepts apply to wireless networks. We introduce the concept of Virtual Radio Function, and illustrate how softwarized/virtualized radio functions can be placed and initialized at runtime, allowing radio access technologies and spectrum allocation schemes to be formed dynamically. Finally we focus on embedded Software-Defined Radio as an end device, and illustrate how to realize the placement, initialization and configuration of virtual radio functions on such kind of devices.

show abstract

Air‐interface virtualization using filter bank multicarrier and orthogonal frequency division multiplexing configurations

Saad

Bhatti

Zafar

et al. 2020

Trans Emerging Tel Tech

View full text Add to dashboard Cite

Mobile networks have to cater for diverse services that have distinct requirements in terms of bandwidth, latency, and so on. Network virtualization is a key technology that efficiently utilizes the network resources to meet these service requirements. In this work, we investigate radio virtualization for creating fine‐grained network slices using orthogonal frequency division multiplexing (OFDM) and filter bank multicarrier (FBMC) combinations; the two are individually referred to as virtual radios (VRs). Using universal software radio peripherals (USRPs), we experimentally analyze multiple configurations of VRs including OFDM‐OFDM, OFDM‐FBMC, and FBMC‐FBMC. An extensive performance comparison is done on the basis of error rate, spectral efficiency, interference power, and computational complexity of the VR configurations that are confined within an operational bandwidth. An increase in transmit power of the VRs is theoretically expected to decrease the error rate, but there is also an increase in adjacent channel interference. Therefore, after a certain decrease in error rate with increase in transmit power, an inflection point is reached after which the error rate starts to increase. Of the three combinations, FBMC‐FBMC gives the lowest error rate (at the highest transmit power), that is, 10% and 18% lower than OFDM‐FBMC and OFDM‐OFDM, respectively. However, FBMC‐FBMC also has the highest complexity. We conclude that this air‐interface virtualization framework allows the network to use the waveform configuration that is best suited to a particular set of services, while considering the pros and cons of the individual waveforms.

show abstract

HyDRA: A hypervisor for software defined radios to enable radio virtualization in mobile networks

Cited by 12 publications

References 4 publications

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

Enabling Virtual Radio Functions on Software Defined Radio for Future Wireless Networks

Air‐interface virtualization using filter bank multicarrier and orthogonal frequency division multiplexing configurations

Contact Info

Product

Resources

About