OneWeb backs up Starlink 5G interference warning

TAMPA, Fla. — Plans to make use of the 12 GHz band for terrestrial 5G would severely disrupt non-geostationary orbit (NGSO) broadband throughout america, OneWeb stated July 11 in evaluation supporting an earlier research from SpaceX.

In a letter to the Federal Communications Fee, OneWeb urged the regulator to reject a request from satellite tv for pc broadcaster Dish Community and spectrum holder RS Entry to run two-way cellular providers within the band.

If accepted, “it will depart important areas of america unusable by the in any other case ubiquitous NGSO [fixed satellite service] consumer terminals,” wrote Kimberly Baum, OneWeb’s vp of spectrum engineering and technique.

To attach consumer terminals, the SpaceX-owned Starlink and OneWeb megaconstellations use a satellite tv for pc downlink band that extends from 10.7 GHz to 12.7 GHz.

The evaluation from OneWeb is the most recent in a string of research assessing how a high-power cellular community within the 12.2-12.7 GHz band would affect NGSO providers.

In keeping with research carried out by engineering agency RKF Engineering Options for RS Entry, the 5G community would affect fewer than 1% of NGSO terminals, and mitigation strategies are available for these which are affected. 

Nonetheless, SpaceX advised the FCC June 21 that its evaluation exhibits Starlink customers would undergo dangerous interference 77% of the time.

SpaceX stated the RFK evaluation was stuffed with inaccuracies, and in addition failed to handle how NGSO operators share the band amongst themselves by means of coordination agreements.

The 5G for 12 GHz Coalition, which incorporates Dish and RS Entry, hit again July 7 by slamming SpaceX’s research as “scientifically and logically flawed.” 

The coalition took explicit challenge with how SpaceX’s evaluation extrapolated nationwide assumptions from exams carried out in Las Vegas.

Baum stated OneWeb’s evaluation largely used the identical assumptions because the RFK research, with “corrections solely to probably the most egregiously flawed assumptions adopted by RS Entry when utilized to the OneWeb system, a few of which overlap with corrections made by SpaceX in its research.”

OneWeb spokesperson Katie Dowd stated the research drew from a suburban space the place each techniques could possibly be deployed, which she declined to reveal.

“Moreover, we made various adjustments to bear in mind the OneWeb system and our enterprise mannequin, similar to NGSO consumer terminals deployed on the tops of a number of story industrial buildings that one would possibly discover in a suburban enterprise park,” Dowd stated.

Like SpaceX, OneWeb’s important challenge with the RFK evaluation is its assumption that NGSO FSS terminals can be deployed with a heavy bias towards rural areas, whereas cellular base stations and gadgets can be closely skewed in the direction of city areas. 

“There is no such thing as a actual world justification for this bias,” Baum wrote to the FCC.

OneWeb’s research warns the operation of NGSO FSS consumer terminals in an space of anticipated cellular deployment “will nearly all the time” lead to dangerous interference.

That is “utterly masked within the RS Entry research, because it appears to be like at deployment unfold over the whole United States versus native circumstances,” Baum stated.

The RS Entry research additionally solely used Starlink to mannequin interference, ignoring different NGSO operators she stated “are architecturally, systematically, and entrepreneurially distinct from Starlink.”

In keeping with Baum, together with OneWeb and others would considerably improve the variety of prospects that an expanded terrestrial service would adversely hurt.

Whereas Starlink is at the moment offering broadband providers throughout america, OneWeb expects to cowl the nation in 2023 after resuming satellite tv for pc deployments later this 12 months.

“The RS Entry research have been solely in a position to present {that a} two-way cellular terrestrial service may coexist with incumbent NGSO FSS operations within the 12 GHz band by creating synthetic separation between the geographic working areas of satellite tv for pc consumer terminals and cellular gadgets,” Baum added.

“In actuality, no such separation can or will exist. Because the document illustrates, the viability of each NGSO FSS and cellular deployments hinge on the power to be ubiquitously deployed.”

Chip Pickering co-chair of the 5G for 12 GHz Coalition, described OneWeb’s research as “one other in-house, non-independent effort to discredit the scientifically confirmed feasibility of coexistence” within the 12 GHz band.

“You will need to be aware that the FCC has already made it clear that any NGSO FSS firm using the 12 GHz band is doing so at its personal threat and there needs to be no expectation of exclusivity inside the band,” Pickering stated.

He stated the coalition stays dedicated to working with the FCC to show how NGSO and terrestrial 5G operators can co-exist within the band.

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