Subject: Mobile | April 13, 2017 - 04:48 PM | Ken Addison
Tagged: X20, t-mobile, spectrum, qualcomm, LTE, Gigabit LTE, FCC, Carrier Aggregation, 600mhz, 5G
This afternoon, T-Mobile's ardent CEO John Legere announced the results of the FCC's recent spectrum auction concerning the low-band 600MHz range. In a $7.99 Billion deal, T-Mobile is set to gain 45% of all of the low-band spectrum being auctioned.
T-Mobile is quick to point out that the spectrum they purchased covers 100% of the United States and Puerto Rico, with a nationwide average of 31 MHz of spectrum acquired. Having this wide of a range of spectrum available nationwide will help T-Mobile with their rollout of Carrier Aggregation, on the road to Gigabit-Class LTE and 5G.
This acquisition wasn't without help from the FCC however. In 2014, when the FCC decided to auction off the spectrum that was previously used for broadcast TV, they decided to set aside 30MHz of the available 70MHz specifically for carriers that did not currently have large holdings in low-band spectrum. This means that ATT and Verizon, who both operate large LTE networks in the 700MHz range were excluded from part of the spectrum being auctioned off.
Low-band spectrum in strategically important for LTE rollouts in particular as it can travel further and works better indoors than high-band offerings like Sprint's large available spectrum in the 2.5GHz
While it usually takes a significant amount of time to see the results of newly acquired spectrum, T-Mobile promises significant network expansion by the end of 2017. Legere claims that over 1,000,000 square miles of the newly acquires spectrum will be cleared for use by the FCC by the end of this year, and put into production by T-Mobile. T-Mobile plans to use this spectrum to both expand LTE coverage into new markets as well as strengthening their coverage in existing markets to provide more speed and greater density of coverage.
However, there is one side of the 600MHz equation that is out of the hands of T-Mobile, the user equipment. Currently, there are no shipping LTE radios capable of operating in the 600MHz range. Qualcomm has announced that their in-development X20 LTE modem will work with 600MHz, but we have no timeline as to a possible release of devices with the X20.
Hopefully, we don't have to wait too long for user devices capable of 600MHz LTE operation, it would be a real shame to have a newly expanded T-Mobile network that no one can connect to!
The road to Gigabit-class LTE and subsequently 5G seems to be a fierce one, and we look forward to seeing developments from competing carriers.
Subject: Mobile | February 21, 2017 - 08:19 AM | Sebastian Peak
Tagged: X20, snapdragon, qualcomm, modem, LTE, DSDV, Category 18, Carrier Aggregation, CA, 5x20 MHz
Qualcomm has announced the Snapdragon X20 LTE modem, their 2nd-generation Gigabit LTE solution built on 10nm FinFET and offering what Qualcomm says are “a number of industry firsts”, which include first to Category 18 (downlink) and first to receive up to 12 spacial LTE data streams simultaneously.
“It is the first commercially announced Gigabit LTE chipset designed to deliver fiber-like LTE Category 18 download speeds of up to 1.2 Gbps, a 20 percent improvement in download speeds over the previous generation. Additionally, it allows support for up to 5x20 MHz downlink Carrier Aggregation (CA) across licensed and unlicensed FDD and TDD radio frequencies, as well as 4x4 MIMO on up to three aggregated LTE carriers. Lastly, it supports integrated Dual SIM Dual VoLTE (DSDV) capability, a first for Snapdragon LTE modems. These leading-edge features of the Snapdragon X20 LTE modem are supported by the first commercially announced single-chip RF transceiver capable of simultaneously receiving up to 12 spatial streams of LTE data.”
Compared the the X16 modem featured in the upcoming Snapdragon 835 SoC, the Snapdragon X20 LTE modem moves from Cat 16 to Cat 18 on the downlink, with support for 5x20 MHz (vs. the X16’s 4x20 MHz) Carrier Aggregation and “can simultaneously receive 12 unique streams of data on as few as three 20 MHz carriers”, with up to 256-QAM and 100 Mbps per stream. Uplink is at the same 2x20 MHz/64-QAM as the X16 modem, for speeds of up to 150 Mbps.
The X20 LTE modem now includes VoLTE for both cards in a dual-SIM implementation:
“The Snapdragon X20 LTE modem also features more advanced dual SIM functionality and, as the first Snapdragon LTE modem to support DSDV, it provides users with the benefits of Ultra HD Voice and other IMS-based services on both SIMs inserted into the device.”
Qualcomm has begun to sample the Snapdragon X20 LTE modem to customers, with the first commercial devices expected 1H 2018.
Full press release after the break.