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HSUPA 概述

The Dec 14, 2006 recording is no longer available.

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High Speed Uplink Packet Access (HSUPA), introduced in Release 6 of the 3GPP standards, is a major addition to the W-CDMA standards. If 2006 was the year of High Speed Downlink Packet Access (HSDPA), 2007 promises to be the year of HSUPA. The aims of HSUPA are to increase data rates on the uplink, reduce overall delay in the system and allow the overall cell capacity to be increased. The addition of HSUPA to a network will also allow HSDPA to reach its full potential.

Achieving this will not be straightforward. The changes present significant challenges to both the User Equipment (UE) and to the base station (Node B). Hybrid automatic repeat request (HARQ) introduces a new fast acknowledged mode transfer mechanism into both the UE and the Node B. The addition of a shorter Transmission Time Interval (TTI) reduces the latency in the system, but will add further demands to the UE processor. The introduction of fast scheduling allows the Node B to change the data rate used by each UE in the cell up to 500 times a second.

This webcast covers the main changes that HSUPA introduces to the physical and transport layers and discusses some of the problems that will need to be addressed in both RF and functional test.