On the feasibility of indoor broadband secondary access to 960–1215 MHz aeronautical spectrum

Obregon, Evanny; Sung, Ki Won; Zander, Jens

doi:10.1002/ett.2701

Cited by 4 publications

(7 citation statements)

References 21 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To recover the temporal SOs provided by mobile PUs with unplanned routes, a workaround has been proposed in the literature, which is illustrated in Figure 6 [22]. It consists in defining an error region around incumbent systems that is then used as an extra protection margin in the estimation of their exclusion zones.…”

Section: Geolocation Database Specificationsmentioning

confidence: 99%

“…f) Mobility -Incumbents' mobility contributes to the unpredictability of spectrum occupancy from the CR's point of view and is usually countered by applying more frequent channel availability checks or by increasing the size of PUs' exclusion zones (e.g. error regions [22]). Incumbents' mobility will, therefore, increase the complexity and energy consumption of CRs and reduce the efficiency of spatial spectrum sharing.…”

Section: Radio Environmental Factorsmentioning

confidence: 99%

See 1 more Smart Citation

Radar, TV and Cellular Bands: Which Spectrum Access Techniques for Which Bands?

Paisana

Marchetti

DaSilva

2014

IEEE Commun. Surv. Tutorials

102

View full text Add to dashboard Cite

Opportunistic access has been considered by regulators for a number of different spectrum bands. In this paper, we discuss and qualitatively evaluate techniques used in the discovery of spectrum opportunities, also called white spaces, in the radar, TV, and cellular bands. These techniques include spectrum sensing, cooperative spectrum sensing, geolocation databases, and the use of beacons. We make the case that each of the three bands considered calls for a different set of spectrum access techniques. While TV bands are well matched to the adoption of geolocation databases, a database-assisted spectrum sensing mechanism may represent the most efficient solution to exploit the spectrum holes in radar bands. We drew this conclusion based on a multitude of factors, such as the radar antennas' constant motion, and the absence of a hidden node problems in these bands. The unpredictability of cellular systems, on the other hand, calls for a more coordinated spectrum access approach, namely beacon signaling, that could be implemented using the already established cellular infrastructure and spare bits of its logical channels.

show abstract

Section: Geolocation Database Specificationsmentioning

confidence: 99%

Section: Radio Environmental Factorsmentioning

confidence: 99%

Radar, TV and Cellular Bands: Which Spectrum Access Techniques for Which Bands?

Paisana

Marchetti

DaSilva

2014

IEEE Commun. Surv. Tutorials

102

View full text Add to dashboard Cite

show abstract

“…Considering that there are N UDN devices around the radar, the aggregate interference is

I_{a} = \sum_{j \in N_{t}} I_{j}

where N t is the set of transmitting UDN devices. The mathematical models employed to compute the aggregate interference can be found in .…”

Section: Sharing Usage Scenariomentioning

confidence: 99%

Is spectrum sharing in the radar bands commercially attractive?—a regulatory and business overview

Obregon

Sung

Zander

2015

Trans. Emerging Tel. Tech.

Self Cite

View full text Add to dashboard Cite

The need to meet users' expectations in the "mobile data avalanche" represents a significant challenge for mobile networks operators (MNOs). More spectrum is a natural way to meet these requirements in a cost and time-efficient way; but new, exclusively licensed, spectrum is increasingly hard to come by. Instead, vertical spectrum sharing has been discussed as a potential solution for finding additional spectrum for mobile communications. In this paper, we focus on vertical spectrum sharing in the radar bands for providing short-range wireless access, e.g. indoors and in "hotspots" that "offload" mobile traffic demand. We propose a methodology for dealing with the technical, regulatory and business aspects of deploying large-scale wireless networks. Moreover, we identify the following criteria for achieving business success: spectrum availability, availability of low-cost enduser devices, system scalability in terms of number of concurrently used devices and finally, the ability to guarantee a quality of service for the users.Our technical availability assessment has identified geo-location database support as necessary technical enabler and detect-and-avoid mechanism as a beneficial technical enabler for improving sharing conditions. Therefore, we propose a * Corresponding author: Dr. Ki Won Sung (sungkw@kth.se) Preprint submitted to Telecommunications PolicyMay 6, 2014sharing mechanism based on three components: a central spectrum manager with a geo-location database controlling the aggregate interference, a spectrum sensing mechanism and a fast feedback between the radars and the central spectrum manager. Moreover, Licensed Shared Access (LSA) was found to be the suitable regulatory framework to support the proposed sharing mechanism and regulatory policies in real-life implementation.Our business feasibility assessment concludes that there is enough spectrum available for indoor and hotspots communication in urban areas in the radar bands to make a large scale system commercially viable. Service quality can be guaranteed and there is a strong potential to construct low-cost devices. Uncertainties do, however, remain regarding the spectrum access cost.

show abstract

“…In this analysis we consider the sharing mechanism proposed in [13], which is based on three design principles. The first principle states that a central spectrum manager controls the aggregate interference from potentially thousands or millions of secondary users and makes a decision on which user can transmit with what power.…”

Section: Secondary Sharing Schemementioning

confidence: 99%

“…Secondary spectrum access to the radar bands faces different technical challenges from the ones in the TVWS, leading to different regulatory policies to enable large-scale secondary access which remain still underdeveloped. Technical feasibility of large-scale secondary spectrum access to some portions of the radar bands has been previously demonstrated [11]- [13]. Therefore, it is worthwhile investigating the regulatory policies that would improve sharing conditions/opportunities for large-scale secondary access to the radar bands where the high capacity demand actually is (i.e.…”

Section: Introductionmentioning

confidence: 99%

On the sharing opportunities for ultra-dense networks in the radar bands

Obregon

Sung

Zander

2014

2014 IEEE International Symposium on Dynamic Spectrum Access Networks (DYSPAN)

Self Cite

View full text Add to dashboard Cite

Abstract-Finding additional spectrum for indoor networks with very high capacity (ultra-dense networks, UDN) is a prime concern on the road to 5G wireless systems. Spectrum below or around 10 GHz has attractive propagation properties and previous work has indicated that vertical spectrum sharing between indoor users and outdoor wide-area services is feasible. In this paper, we focus on spectrum sharing between UDNs and radar systems. We propose and evaluate regulatory policies that improve sharing conditions/opportunities in areas with large demand (i.e. hot-spots and urban areas). We consider three regulatory policies: area power regulation, deployment location regulation and the combination of these. We address the scenario where secondary users can reliably exploit time and space domain sharing opportunities in the S-and Ku-Bands by means of geo-location databases and spectrum sensing. We evaluate these opportunities in terms of the required time-averaged separation distance between the radar system and the UDN that both protects the radar system as well as guarantees a minimum secondary transmission probability. Our results show that there are ample adjacent channel sharing opportunities for indoor usage in both the S-and Ku-Bands. In the Ku-Band, even outdoor hot-spot use is feasible with very relaxed restrictions. Co-channel usage in the S-band requires large separation distances that makes it practically unfeasible in cities with nearby radar sites. Overall, deployment location regulation seems to be the most effective means to limit interference to the radar system and improve sharing opportunities.

show abstract

On the feasibility of indoor broadband secondary access to 960–1215 MHz aeronautical spectrum

Cited by 4 publications

References 21 publications

Radar, TV and Cellular Bands: Which Spectrum Access Techniques for Which Bands?

Radar, TV and Cellular Bands: Which Spectrum Access Techniques for Which Bands?

Is spectrum sharing in the radar bands commercially attractive?—a regulatory and business overview

On the sharing opportunities for ultra-dense networks in the radar bands

Contact Info

Product

Resources

About