In a notebook, you get the same potential improvement in battery life but there’s one more: a wireless alternative to Gigabit Ethernet. In a smartphone, such high bandwidth from WiFi is really useful for improving battery life (race to sleep). In his review of the HTC One, Brian documented peak performance using iPerf and a TCP transfer. Both of these devices were single antenna/single spatial stream implementations with 80MHz channels and 256QAM, resulting in a max PHY rate of 433Mbps. The first 802.11ac implementations we saw were on the smartphone side with HTC’s One and Samsung’s Galaxy S 4. Usable bandwidth should also see improvements on 802.11ac as high-end access points are all expected to ship with beam forming enabled. Today, that means a doubling of channel bandwidth and a 4x increase in data encoded on a carrier, which are responsible for the significant increase in bandwidth.
40MHz in 802.11n) and better spatial efficiency within those channels (256QAM vs.
802.11ac is a 5GHz-only WiFi standard, with support for wider channels (80/160MHz vs. I wrote a primer on 802.11ac last year, but I’ll provide a quick recap here. Haswell isn’t all that’s new with the 2013 MacBook Air, Apple also integrated support for 802.11ac.
0 kommentar(er)
