Efficiency affect of midband spectrum: Chosen exams


Midband spectrum is also known as having the correct mix of efficiency functionality and protection for cellular networks, notably 5G, when in comparison with low-band or millimeter-wave spectrum. As midband spectrum is being deployed, what affect is it having on community efficiency?

T-Cellular US’ jump-start on midband has improved its efficiency over the previous 18-24 months. For proof of the affect of midband spectrum on efficiency, one want look no additional than T-Cellular US’ community efficiency enhancements previously couple of years. Up till about 2021, community pace and knowledge efficiency awards from the likes of Rootmetrics had been a contest between AT&T and Verizon, with Verizon the frequent winner. (T-Cellular US tended to do higher on the metropolitan stage by way of efficiency.) Within the second half of 2020 (when T-Cellular US closed on the Dash merger), Rootmetrics recorded the three nationwide carriers’ mixture median obtain speeds on a U.S.-wide foundation as Verizon at 40 Mbps, AT&T at 33.8 Mbps and T-Cellular US at 20.1 Mbps. Verizon was outcompeting each AT&T and T-Cellular US, by Rootmetrics’ reckoning, in a majority of metropolitan markets throughout the nation as nicely.

However that started to shift the next yr, as T-Cellular US started its multi-year effort to combine the Dash community and put its new midband spectrum holdings at 2.5 GHz to work. Within the first quarter of 2021, Ookla reported that primarily based on its crowd-sourced Speedtest knowledge, T-Cellular US had overtaken AT&T because the quickest U.S. operator, with Verizon in third place. By the second quarter of 2021, that translated to median community speeds of 54.13 Mbps for T-Mo, 47.96 Mbps for AT&T and 40.02 Mbps for Verizon. Within the second quarter of this yr, although the deployment of recent C-Band spectrum had boosted Verizon’s median pace to 59.67 Mbps and put the service in second place, T-Cellular US was registering 116.54 Mbps as a median community pace—largely due to the two.5 GHz that T-Cellular US had deployed, in addition to the elevated adoption of 5G.

By way of 5G-only exams, Ookla mentioned that T-Cellular US had the quickest median 5G obtain pace through the second quarter of this yr: 187.33 Mbps. Verizon was in second with 113.52 Mbps, a rise over the 107.25 Mbps that it registered within the first quarter of 2022. AT&T, in the meantime, which has but to deploy a lot of the C-Band spectrum that it acquired as a result of it will get cleared later, was at 5G speeds of 71.54 Mbps within the second quarter of 2022. Availability comes into play as nicely; Ookla reported that 5G availability was highest for T-Cellular US customers, with 68.5% of them on 5G for almost all of the time; AT&T was second at 55.8% and Verizon was third at 31.2%.

C-Band is enabling Verizon and AT&T to pursue T-Cellular US’ 5G lead. In evaluation from Opensignal revealed final week, each AT&T and Verizon are turning up extra C-Band spectrum throughout the nation and seeing their community speeds improve consequently.

Opensign mentioned that the p.c of AT&T’s sub-6 GHz 5G exams that got here through C-Band rose from 5.9% in April 2022 to almost 10% in Might; by September, greater than 30% of 5G readings on AT&T’s community occurred in 3.7 GHz, reflecting expanded deployment of the spectrum. On speeds, Opensignal reported that AT&T customers’ obtain speeds on 5G had been up by 34.6% since March of this yr. These enhancements come although AT&T received’t get entry to a considerable quantity of the spectrum it bought till late subsequent yr—leaving substantial runway left for turning up further 5G midband spectrum over the approaching years.

By way of impacts on Verizon’s community, Opensignal discovered that 5G readings coming from C-Band spectrum have elevated from 16.2% in March 2022 to almost 50% in September. Common 5G obtain speeds elevated 15.8% throughout that very same timeframe. Learn extra particulars right here.

CBRS boosts efficiency considerably as nicely. Regardless of decrease energy ranges and a tiered spectrum-sharing system to be used, the Residents Broadband Radio Service (CBRS) spectrum can be offering a lift to cellular networks. By way of deployment, a number of testing and evaluation reviews from Rootmetrics (previous to its acquisition by Ookla) and Opensignal have reported that Verizon’s deployment of CBRS has been on the rise even earlier than the corporate acquired PALs. Rootmetrics mentioned that as of late 2020, it noticed CBRS spectrum in use on Verizon’s community in 70 metropolitan areas, up from 41 cities within the first half of 2020. In CBRS-specific testing in Philadelphia, the benchmarking firm discovered median obtain speeds in CBRS versus non-CBRS spectrum of 135.1 Mbps and 64.2 Mbps, respectively. Peak speeds had been much more spectacular: 692.1 Mbps in CBRS spectrum and 404.9 Mbps in non-CBRS spectrum. Adam Koeppe, Verizon’s SVP of community know-how and planning, informed RCR Wi-fi Information on the time that the ability limits had been nonetheless a very good match for small cells and concrete rooftop websites, and that the clear path to 5G NR in CBRS was one other bonus of the spectrum.

Opensignal evaluation from late 2021, in the meantime, discovered that (underneath circumstances of 40 megahertz of spectrum getting used) Verizon’s CBRS LTE supplied sooner speeds than different LTE midband spectrum (AT&T’s 2.3 GHz and T-Cellular US’ 2.5 GHz). “On the connections with the CBRS band concerned, 4G obtain speeds skilled by Opensignal customers had been 78.8% sooner than these with out the CBRS band — clocking in with a powerful rating of 74.4 Mbps. This was sooner than what AT&T and T-Cellular achieved with the assist of their mid-band spectrum within the cities — 47.3 and 61.6 Mbps, respectively.” Nonetheless, predictably, the ability ranges in CBRS dropped off a lot sooner than different midband airwaves; whereas LTE customers inside about 770 toes of a CBRS website noticed common obtain speeds of greater than 136 Mbps, that dropped to round 76 Mbps at a distance between 770-1540 toes and once they had been greater than 2,300 toes away, the common pace dropped to round 23 Mbps. All of the analyzed spectrum bands noticed a fall-off in efficiency, Opensignal famous, however each CBRS’ peak efficiency, and its drop-off with distance, was the best.

In search of extra info on 5G spectrum and RF points in 4G/5G networks? Take a look at our current webinar that includes Anritsu and LitePoint, and obtain the free accompanying editorial particular report.


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