Given the difference in duplexing and regional agendas, it’s easy to see TDD and FDD versions of LTE as distinct; in reality, they’re part of a unified standard.
It’s also tempting to see LTE TDD as disadvantaged by the history of WiMAX or operator interests in FDD spectrum; again, this isn’t a fair way of looking at the technology.
Back in June, I promised to spend some time this summer (and maybe even into the fall) talking about LTE TDD. That started with a discussion of how massive deployments in the People’s Republic could lead one to think of LTE TDD as a Chinese technology, a notion that runs counter to any interests in seeing LTE’s TDD variant benefit from global manufacturing and R&D scale. A look back at the development of LTE standards backed up the notion that, from its inception, TDD was envisioned as an integral part of LTE, not a narrow, regional use case.
If I can believe my desk calendar, it’s almost summer. With the longest day of the year fast approaching, my mind has turned to all of the usual topics: fireworks, hot dogs, bitter jealousy aimed at European colleagues who take four-week vacations, LTE TDD.
Okay, summertime and LTE TDD might not go hand-in-hand, but there are some real reasons the TDD implementation of everyone’s favorite 4G technology has been on my mind. Earlier this month, I spent some time with my consumer analysts out in Kansas City visiting Sprint; with LTE TDD at the foundation of Sprint Spark, you know the technology was a major component of the discussions with them. This week, I’m sending some of my team to Shanghai in order to catch up with our friends at ZTE. Along with Huawei (which we visited in April), ZTE is expected to benefit significantly from LTE TDD deployments in China over the next year or so; the two vendors won the lion’s share of China Mobile’s LTE TDD awards. This was long-expected and the scale won in supplying these networks is expected to benefit them, particularly if the other Chinese mobile operators follow suit.