Wireless Technology (Surfing on the double wave)

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Tuesday July 24, 2012 · 3:49 AM PDT

2012/07/24 · 03:49

The UMTS-HSPA accelerators, high-speed packet access, was first used in 2005 as a test. Since then, the technology has initially established in the form of the accelerator receiving high speed downlink packet access. Initially, she delivered gross peak rates of 1.8 and 3.6 Mbit / s, then 7.2 and finally 14.4 Mbit/s Meanwhile, also came to an accelerator for the transmit direction, High Speed Uplink Packet Access, HSUPA. So you can now in many locations with up to 5.76 Mbit / s send. In summary, it will be named High Speed Packet Access, HSPA.

Although it can also screw on HSUPA yet, but within the confines of which is designed for battery-operating devices is very little to do. They are supposed to absorb as little power and therefore can not implant them costly energy-hungry process.

Thus, the UMTS development focuses primarily on the downlink. The next step, which is known under the name HSPA + or Evolved HSPA and also now holds in the local mobile networks foot was specified 2007th The Australian Telstra HSPA + launched in February 2009 and at that time already provided up to 21.6 Mbit/s, as is now the local networks of E-Plus and Vodafone. O2 had waved HSPA + in late 2009 but already in the program, but in order to LTE and left it with some built in Munich-based stations that reach at least up to 28 Mbit/s. The next step brings acceleration even up to 42.4 Mbit / s Six percent of the world's network operators have reached the 42.4-Mbit/s level, according to the network supplier Ericsson today. In Germany, they first want to install only the telecom, according to plans later this year.

It should have a mobile surfers in mind if you now about a HSPA + capable USB flash drive looks, because the later can not upgrade to a higher speed level, he has to be designed from the outset. This speed level controls such as the wireless router Vololink VA126-S. How do the HSPA + device opens up the data rates, from the mobile specification "Release 8" of the 3rd Generation Partnership Project. You must read this of course not, we have summarized the main features in addition.

There are three initial points, the improvements over the 14.4 Mbit/s bring s fast precursor HSPA: the multi-antenna technology MIMO multiple spatial streams, high-order modulations that deliver more bits per transmission step (Higher Order Modulation, HOM) and channel bonding (Carrier aggregation). All this changes also draws on higher protocol layers according to: network and other signaling devices must be so, when and what technology is being driven - and in the case of the terminals, which process they have on it at all.

In addition, honed the fathers of the HSPA + technology and the management protocols for the subscriber equipment. These are summarized under the term Continuous Packet Connectivity (CPC). These measures reduce the mutual interference among the participating units and increase the capacity for user data.

Samsung S3 (Four cores)

Maxjohnsonfernandis

Community (This content is not subject to review by Daily Kos staff prior to publication.)

Tuesday July 24, 2012 · 3:43 AM PDT

2012/07/24 · 03:43

The credit for the first smartphone with quad-core processor will go to HTC: The One X with Nvidia Tegra 3 appeared in April. Samsung opted for the now Exynos 4 quad from its own production - and thus created the rounder concept. After all, unlike the One X, which proved to be outspoken firebrand, was the S3 superior. While the clock down to three Tegra benchmarks repeatedly had to not overheat the loose Exynos sprinted to the top. Only after intensive test runs in summer temperatures will also occasionally slowed the S3's performance - a sign that explore the limits of the possible four cores for smartphones. Warmer than about 39 degrees (32 degrees in normal operation), the S3 was never here, while the X One reached 51 degrees.

The Exynos 4 Quad is made differently than its predecessor in the Galaxy S2 now with 45 nm in 32 nm feature size, which reduces the energy consumption and allows for higher clock rates. The four processor cores - still ARM Cortex A9 - reaching up to 1.4 GHz. The graphics unit is also already known Mali 400 with four graphics cores will be clocked at 400 MHz even twice as high as in the predecessor. So far they surpassed even the leaders in most categories Qualcomm Snapdragon S4 with two cores from the HTC One S.

The high clock rates are particularly evident in the graphic-intensive GL benchmark noticeable: About 30 percent more frames per second as previously the Android graphics accelerator (Qualcomm Adreno 225) creates the Mali 400 is reached and thus even the spheres of the PowerVR in iPhone 4S. In the CPU test score marks of 4 with four threads Exynos suggests just the Tegra third In the more important for many applications, single-thread performance, he set a new record in the JavaScript test.

This can be felt in everyday life: The S3 can be used in any situation serve as soft as butter, no switching between the desktops of TouchWiz interface or scrolling on complex web pages with numerous illustrations bring the phone out of step - with Android four already less susceptible to is stuttering.

On the terms affects the performance of non-negative. Also thanks to the powerful battery, the S3 compared to other high-end devices with Android, not only in most categories hold, but are, at a remarkably high values in the Video running time.

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