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HSPA+ - up Close and Personal, Down Under
Signals Research Group, LLC, July 2009, Pages: 31
This is an individual issue from Signals Ahead, which can be viewed by following the link below.
In part two of this series on HSPA+ the publsher provides what they believe is now the most comprehensive, independent, and publicly available analysis of any commercially-deployed wireless network since the introduction of analog cellular technologies.
As such, this report, which includes more than 50 figures or tables, offers great insight to operators and vendors who are doing strategic planning, not to mention anyone seeking competitive information on the performance of the technology.
Over the course of a five day period, the publisher transferred 41GB of data and drove 400km while testing the network. During these tests, which included a Cat 14 (HSPA+, 21Mbps) USB dongle, a USB dongle that supported 5.7Mbps in the uplink, a Cat 9 (10.2Mbps) handset and a Cat 8 (7.2Mbps) handset, they used various test equipment to collect a wealth of underlying KPIs. These KPIs provided us with a rich set of data, thus allowing us to determine not only how the devices were performing (e.g., throughput), but why they were performing as they did.
The publisher tested over a wide range of scenarios, including individual and concurrent testing, and while operating in stationary, pedestrian or vehicular modes. Nearly 90% of the testing was done from a moving vehicle (400km of driving), thus giving us performance results over a vast geographic region, not to mention introducing some very challenging, albeit realistic, RF environments.
In order to be as objective as possible, the publisher published results for virtually all of the tests that they conducted. Key Performance Indicators (KPIs) that they provide in this report include average throughput, normalized throughput, average CQI, distribution of modulation schemes, scheduling success rate, distribution of assigned HS-PDSCH codes, total receive power, length of test, latency and vehicular speed.
For many of the test scenarios they used the geo-coded information to plot some of the most important KPIs using Google Earth, thus providing a rich and powerful means of presenting the results.
This report is critical reading for operators and vendors who are doing strategic planning, not to mention anyone seeking competitive information on the performance of the technology.
This report is critical reading for the following reasons:
The Data. In order to be as objective as possible, the publisher published results for virtually all of the tests that they conducted. Key Performance Indicators (KPIs) that the publisher provide include average throughput, normalized throughput, average CQI, distribution of modulation schemes, scheduling success rate, distribution of assigned HS-PDSCH codes, total receive power, length of test, latency and vehicular speed.
The Plots. For many of the test scenarios the publisher uses the geo-coded information to plot some of the most important KPIs using Google Earth, thus providing a rich and powerful means of examining the results.
The Performance. The publisher reveals how HSPA/HSPA+ devices perform in an HSPA+ network under a wide range of scenarios and in head-to-head tests (Cat 14 versus Cat 9 and Cat 9 versus Cat 8, etc). They examine why there are performance differences between different categories of devices, discuss some of the debate surrounding the benefits of 64QAM, and provide very clear results which indicate whether or not HSPA+ (64QAM) can be readily achieved in a commercial network, and under what circumstances.
The Downside. For reasons that the publisher discusses and demonstrate, a typical user will not have the same experience that they had in Telstra’s Next G network, or in any next-generation wireless network for that matter. The publisher discusses why this is the case and what operators may need to do to squeeze more performance out of their existing and next-generation wireless networks.
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