Howard Buskirk

Amateur radio operators were the most prolific commenters to an FCC Public Safety Bureau request for comment on the effects of the May 7-11 geomagnetic storm. Responses were due Monday in docket 24-161 (see 2405240046). Amateurs submitted most of the 17 comments. “Developing an ability to better predict storms such as the … 2024 geomagnetic storm is essential to prevent serious disruptions to our nation’s communications services as well as to the electric grids that power them,” the American Radio Relay League said. The storm “affected amateur radio communications as expected, with radio black outs between many areas of the world and signals with substantially reduced strength between other areas of the world, depending upon frequency and time,” ARRL said. NOAA said the storm touched some of its systems. “With the growing interdependence on spectrum across critical infrastructure systems, there is increased potential vulnerability to space weather,” NOAA said. The agency said “several specific examples can be seen of systems operating erratically due to the geomagnetic storms,” including farm equipment running in circles “due to loss of navigational signals.” SpaceX satellites “measured two-to-three times more drag than normal in orbits at 300 km and as much as five times more drag in orbits at 550 km,” it said. SpaceX was “fortunately able to maintain service throughout the May solar storm,” and on the day the storm peaked, “the average Starlink user saw less than one minute of disruption.” Iridium’s second-generation constellation “experienced an instantaneous, but short lived, increase in the atmospheric drag up to 10 times greater than normal” during the storm, the company reported. Iridium said it continuously monitors its system and was able to address the storm's issues: “The monitoring for this storm was not new, although more engineers were required to be engaged because each of the six planes in the constellation has a different angle from the sun, and experienced different impacts from the storm.”

Policymakers have a better appreciation for the importance of standards as the telecom industry moves closer to the launch of 6G, experts said Tuesday during a 6G workshop streamed from the Technology & Innovation Centre at the University of Strathclyde in Glasgow, Scotland. Experts warned that standards development is complicated and always is a lengthy process.

Vodafone and other wireless carriers have a ways to go to deploy 5G and are in no hurry to get to 6G, David Lister, Vodafone 6G research lead, said Monday during a 6G workshop streamed at the Technology & Innovation Centre at the University of Strathclyde in Glasgow, Scotland.

T-Mobile and the Competitive Carriers Association last week said the FCC should make FirstNet subject to the agency’s network outage and disaster information reporting systems. The comments were filed in docket 21-341 as the FCC took reply comments on a January Further NPRM, which raised the matter (see 2406130023). "Every other commenter -- except FirstNet -- addressing this issue also supported the extension of outage reporting requirements to FirstNet,” T-Mobile said. The carrier cited AT&T’s February outage, which also affected FirstNet (see 2402220058). “The record demonstrates support for the FCC’s proposal to extend resiliency reporting to FirstNet and similarly notes the benefits FirstNet reporting would provide,” said CCA. In addition, the group raised competition issues: “Some wireless providers compete with FirstNet, and parity in terms of FCC reporting requirements along with increased transparency in terms of network outages and resiliency will put wireless providers on a more competitively neutral footing.” In initial comments, the FirstNet Authority argued against the proposed requirement. “Information about FirstNet’s network status, infrastructure, and assets is already included as part of AT&T’s DIRS and NORS reporting and therefore available to the FCC,” the authority said. Expanding the rules to “explicitly apply to FirstNet would be duplicative.”

CTIA and other commenters raised concerns about an FCC notice seeking comment on rules for implementing multilingual wireless emergency alerts. Comments were due last week in dockets 15-91 and 15-94 on a notice from the FCC Public Safety Bureau (see 2405130047).

FCC Chairwoman Jessica Rosenworcel said Thursday that she circulated for a commissioner vote an NPRM seeking comment on further changes to rules for the citizens broadband radio service band. An FCC and NTIA agreement unveiled Wednesday on broader use of CBRS (see 2406120027) shows what's possible when you push the boundaries of how spectrum is shared, experts said Thursday during a discussion at the International Symposium on Advanced Radio Technologies (ISART) conference in Denver.

Industry commenters urged the FCC to avoid imposing additional outage reporting requirements. Reply comments to a January Further NPRM (see 2401250064) were filed this week in docket 21-346.

The FCC Wednesday notified certified spectrum access system administrators in the citizens broadband service band that they are now permitted to implement changes to the existing aggregate interference model used to protect federal operations in the band. Among the changes, SAS administrators may now assume an 80% time division duplex activity factor and 20% network loading factor for each CBRS device in the aggregate interference calculation, said a notice from the Wireless Bureau and Office of Engineering and Technology. Administrators may use median irregular terrain model terrain dependent propagation loss “using reliability and confidence factors of 0.5 -- to calculate the aggregate received power levels” within a protection area. The FCC urged administrators to submit a demonstration of their ability to implement the new testing parameters in docket 15-319. NTIA approved the changes in a letter to the FCC posted Wednesday. “The changes outlined … will expand Internet access to more people across the country,” said NTIA Administrator Alan Davidson: “They could not have been implemented without the collaboration of the Navy and our ongoing coordination with the FCC.” The change will expand use of the band to tens of millions of Americans, said FCC Chairwoman Jessica Rosenworcel. “The CBRS dynamic spectrum sharing framework is already fertile ground for wireless innovation, and through collaboration with [DOD], NTIA, and stakeholders, we are expanding opportunities for reliable spectrum access while also ensuring that federal incumbents remain protected,” she said. The changes authorize service to approximately 72 million more POPs and expand the total unencumbered CBRS area to roughly 240 million POPs nationwide, the agencies said. CBRS is a prime example of how industry and government can coordinate on spectrum, Ira Keltz, deputy chief of the FCC’s Office of Engineering and Technology said Wednesday at the International Symposium on Advanced Radio Technologies (ISART) conference in Denver. When CBRS started, the initial exclusion zones were “huge” and would have excluded 75% of POPs, he said. NTIA, working with engineers, was able to reduce the size of the zones so that CBRS made more sense, industry was willing to invest, and the Navy felt comfortable that its radars would be protected, Keltz said. “It just really comes down to people being open-minded,” he said. Derek Khlopin, NTIA deputy associate administrator, noted the work to make CBRS work better. “These improvements we’ve made have been phenomenal,” he said, also at the ISART conference. He credited the Navy for its willingness to work with the NTIA and the FCC. “With little ‘greenfield’ spectrum available yet ever-increasing demand for spectrum-driven utilizations, sharing allows more efficient use of limited spectrum resources,” emailed Richard Bernhardt, vice president-spectrum and industry at the Wireless ISP Association: The development “will provide more predictability and allow for approximately 72 million additional people to be covered by CBRS without having to move or change power due to Federal operations.”

The FCC and NTIA are working together as well as Ira Keltz has seen in his 30 years of government service, but the deputy chief of the FCC’s Office of Engineering and Technology said finding consensus on spectrum issues remains difficult. Keltz spoke Wednesday at the International Symposium on Advanced Radio Technologies (ISART) conference in Denver. Echoing Keltz was Derek Khlopin, NTIA deputy associate administrator in the Office of Spectrum Management.

The work that industry and government are doing addressing “clutter analysis” and dynamic sharing is critical to the future of wireless, Shiva Goel, NTIA senior spectrum adviser, said at an International Symposium on Advanced Radio Technologies (ISART) conference on Tuesday. Goel said the government, working with industry, is making progress. The Denver conference's main focus this week is on propagation models that account for the impact of clutter, including foliage and buildings, on wireless signals.