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HSPA+ Evolution to Release 12: Performance and Optimization by Pablo Tapia, Antti Toskala, Harri Holma

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10 HSPA+ Performance

Pablo Tapia and Brian Olsen

10.1 Introduction

HSPA+ is nowadays a mature network technology that has been deployed globally for a number of years. Technologies such as 64QAM, Advanced Receivers, and Release 8 Dual Cell are well adopted today in a large number of network and devices.

This chapter analyzes the performance of various HSPA+ features in live network environments with real traffic loads. The maturity of the tested networks helped achieve performance levels that are close to the theoretical expectations from the technology itself, unlike previous hardware and software versions that often presented problems and design limitations. Even so, wide variations in performance amongst different infrastructure vendors can still be noticed, as will be discussed in detail in Sections 10.3.7 and 10.4.3. In some cases, the scenarios analyzed present challenges due to coverage, traffic load, or interference, as can be expected from real network deployments.

In the various sections, several test scenarios are analyzed, including different RF environments in stationary and mobile conditions. A detailed performance analysis is offered for each scenario, focusing on special interest areas relevant to each particular case; special care is taken to analyze the behavior of the link adaptation mechanisms, which play an important role in optimizing the performance of the data transmission and thus the spectral efficiency offered by the technology.

In general, the results ...

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