Testing HSUPA devices Article Reprint

PublishTime：2021-04-26

Although HSDPA and HSUPA are independent services,they will typically be used together for applications such as VoIP and mobile gaming. HSPA is an industry term for HSDPA + HSUPA.
HSUPA uses Hybrid Auto-matic Repeat-reQuest (ARQ) as in HSDPA—but in HSUPA,the Node B acknowledges the user equipment's (UE) data transmission.Node B dynamically allocates power among the UEs on a TTI basis.The UE’s serving grant (power allocation) effectively determines the data rate at which it may transmit.To achieve 5.74Mbps in the uplink,UEs must support the (optional) 2ms TTI defined for HSUPA. Early (category 5) devices support only the 10ms TTI, limiting the uplink data rate to 2Mbps.
HSUPA introduces several new uplink and downlink channels.The Enhanced Dedicated Channel (E-DCH) uplink transport channel carries one block of data per TTI. The E-DPDCH carries the uplink user data. The UE can transmit up to four E-DPDCHs, at a spreading factor of SF256 to SF2. 2*SF2 E-DPDCHs are required to achieve 2Mbps, the maximum data rate supported by early devices.The E-DCH Dedicated Physical Control Channel (E-DPCCH) uplink channel carries the control information needed by Node B to decode the uplink E-DPDCH,such as the E-DCH Transport Format Combination Indicator (E-TFCI),which indicates block size,Retransmission Sequence Number and the Happy Bit, which indicates whether the UE is happy with its current serving grant. The three new downlink physical channels are as follows:the E-DCH HARQ Acknowledgement Indicator Channel is used to acknowledge the UE’s data;the E-DCH Absolute Grant Channel provides the absolute limit of the power resources (serving grant) the UE may use;and the E-DCH Relative Grant Channel moves the UE’s serving grant up or down (or signals a hold).
A new HSUPA loopback using Radio Bearer Test Mode is defined in 3GPP TS 34.109. It requires an HSDPA downlink with a carefully chosen data rate such that the UE is provided a steady stream of data to loop back up on its HSUPA channels, but without excessively overflowing its buffers.

Brand of Product：	Keysight
Part#：	HSUPA More Part#
Product Category：	devices More
Application：	[ VoIP ][ mobile gaming ] More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	May 13, 2015
Version Number：
Data Encoding：	5989-7843EN
Data Size：	391 KB

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