HSUPA Category Definitions and Data Rates

- a summary of the different HSUPA categories, the HSUPA category definitions and the different data rates.

In order to be able to cater for a number of variations in the level to which HSUPA is implemented, a number of different HSUPA categories have been defined. These HSUPA categories are equivalent in function to those used on the downlink, althought he actual parameters and speeds are naturally different.

The HSUPA categories allow for different levels of performance within the UE. The characteristics of the UE can then be easily communicated to the network which can then communicate with it in a suitable manner.

HSUPA category definitions

The HSUPA categories are detailed in the table below. This shows the different HSUPA categories with their data rates, and other required parameters.

HSUPA category number Maximum number E-DPDCHs Minimum spreading factor Support for 2 ms TTI* Maximum transport block size
(10 ms TTI)
Maximum transport block size
(2 ms TTI)
Maximum data rate
1 1 SF4 - 7110 - 0.7 Mbps
2 2 SF4 Y 14484 2798 1.4 Mbps
3 2 SF4 - 14484 - 1.4 Mbps
4 2 SF2 Y 20000 5837 2 Mbps for 10 ms TTI
2.9 Mbps for 2 ms TTI
5 2 SF2 - 20000 - 2.00 Mbps
6 2 + 2** SF2 Y 20000 11520 2 Mbps for 10 ms TTI
5.74 Mbps for 2 ms TTI

HSUPA category definitions

*A 10 ms TTI is supported in all categories
** Two E-DPDCHs at SF2 and two at SF4

Support for the E-DCH TTI (Transmission Time Interval) of 10 ms is required for all HSUPA categories. It is only some HSUPA categories that support a 2 ms TTI. Also the highest data rate supported with a 10 ms TTi is 2 Mbps. The reason for this is to limit the amount of buffer memory required in the NodeB for soft combining because a larger block transport size means that a larger soft buffer is needed for retransmissions.

By Ian Poole

<< Previous   |   Next >>

Share this page

Want more like this? Register for our newsletter

portage-et-customisation Yannick Chammings | Witekio
Cross-platform frameworks - a step in the right direction towards coding utopia
The concept of cross platform frameworks is the obvious way forwards where software is required on several platforms - but the reality is not always as easy as the concept might indicate. Find out more . . .
Online - Effective Vector Network Analyzer Measurements
How to make effective VNA measurements at RF and microwave frequencies

More training courses

New External Power Supply Regulations Are Coming in 2016
In this whitepaper, power supply experts CUI look at the standards & requirements for power supplies around the globe that will hit the industry by 2016.

More whitepapers

Radio-Electronics.com is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy