The test set's packet switched (PS) data service is a complete end-to-end service conforming to the GPRS Packet Data Service described in 3GPP TS 23.060. For example, you can connect the test set's LAN port to your network and make a complete connection from the UE through the test set to that network. The lab application does not provide any applications support or network services above TCP/IP packet handling.
PS Domain Information
must be set to
before a UE will initiate PS services with the test set.
For an example of establishing a packet data connection, see Establishing a Packet Data Connection .
The test set supports an HSDPA packet data connection as defined by 3GPP TS 34.108 184.108.40.206.5.1 (see GPRS Radio Access Bearer ). You must specify some aspects of the channel configuration by providing the UE category to the test set (see Current UE HS-DSCH Category , but note that the HSDPA packet data service in the test set only supports UE categories 1-6, 11 and 12) and by specifying a PS Data HS-DSCH Configuration Type .
Based on the Current UE HS-DSCH Category , the test set sets the number of HARQ processes to the value in 3GPP TS 34.108 s220.127.116.11.18.104.22.168.2 (for example, number of HARQ processes is set to 6 for a category 12 UE).
Based on the Current UE HS-DSCH Category , the test set sets the inter-TTI interval to the "Minimum inter-TTI interval" value in 3GPP TS 25.306 Table 5.1a (for example, inter-TTI interval is set to 1 for a category 12 UE).
Based on the PS Data HS-DSCH Configuration Type setting, the test set sets the transport block size, number of HS-PDSCHs, modulation type and IR buffer size (N IR ) to the values in 3GPP TS 25.214 s6A.2 Tables 7A-E (depending upon the Current UE HS-DSCH Category ).
The test set supports an HSPA channel configuration for packet data connections that is combined with HSDPA as defined by 3GPP TS 34.108 22.214.171.124.6.1 (see GPRS Radio Access Bearer ). The HSUPA packet data service in the test set supports either a 10 ms E-DCH TTI or a 2 ms E-DCH TTI (see E-DCH TTI ). The test set also supports up to four E-DPDCHs transmitted by the UE with a minimum spreading factor of SF2. The actual number of E-DPDCHs and the spreading factor the UE uses are dependent on the PS Data E-DPDCH Max Channel Codes setting, the amount of data waiting to be transmitted, the UE's serving grant, the UE's E-DCH capability and the power the UE has available.
|E-DCH UE Category||Max Block Size||Uplink Data Rate|
|Category 1||7110||0.7 Mbps|
|Category 2||14484||1.5 Mbps|
|Category 3||14484||1.5 Mbps|
|Category 4||20000||2.0 Mbps|
|Category 5||20000||2.0 Mbps|
|Category 6||20000||2.0 Mbps|
|Category 7||20000||2.0 Mbps|
The HSUPA packet data service in the test set only supports scheduled grants. During call setup the UE is given an absolute grant. Once on the call the UE's Serving Grant can be modified either by transmitting a new absolute grant or by sending up or down relative grant command. If the test set does not send a specific Up/Down command request, it sends a hold on the E-RGCH. Note that the HSPA Cell 1 Connected E-RGCH Level must be set to On (by default it is set to Off) in order for the UE to hear the relative grant commands.
During call setup, the UE is given a minimum E-TFCI set. This setting is effectively a minimum serving grant that is available even if the actual serving grant is reduce below the value by commands sent on the E-AGCH or the E-RGCH. Also during call setup, the UE is instructed to use a HARQ RV Configuration = rv0 (that is, chase combining), however the test set only performs demodulation and decoding on the most recently received E-DPDCH frame (and therefore it does not actually perform chase combining).
If the E-HICH Behavior is set to Active, the test set transmits Ack/Nack responses on the E-HICH based on whether the E-DPDCH passed its CRC check or not. If the UE did not transmit on the E-DPDCH then the Alternate E-HICH Signature is used on the E-HICH to simulate a DTX.
Scheduling information sent by the UE in the MAC-e PDUs can be viewed in the contents of the MAC-e/es layer messages which can be captured by using the Wireless Protocol Advisor (WPA). By default the scheduling information is off. To turn scheduling information on, see Scheduling Information Periodicity (No Grant) and Scheduling Information Periodicity (Grant) .
The MAC-e/es PDUs are logged as a single PDU that has both MAC-e and MAC-es fields decoded. In addition to the MAC-e/es PDU contents, WPA logs all the information contained in the header of the MAC-e/es PDU. All E-DCH data is logged including blocks that fail their CRC check. Note that if a MAC-e/es block is marked as failing its CRC check, it could either be due to a bit error in the information itself, or because of a bit error on the E-DPCCH and thus the L1 header information (number of HARQ processes, E-DCH block size, RSN, Happy Bit, number of channels and spreading factor, E-AGCH and E-RGCH) logged for each MAC-e/es frame does not match what the UE attempted to transmit.
GPIB command: CALL:SERVice:GPRS:RAB
You may configure the test set to reject your UE's request to start a packet data session using the Activate PDP Context Control settings.
Access Point Name State
setting allows you to choose whether the test set includes an Access Point Name (APN) in the Request PDP Context Activation message that is used to begin network initiated PS connections (see 3GPP TS 34.108 s126.96.36.199.3 and
Test Set Initiated GPRS Service
). You can choose an APN using the
Access Point Name
setting, or set
Access Point Name
and then use the
command to set a custom value.
Determines whether the test set includes an Access Point Name (APN) in the Request PDP Context Activation message. The APN value is set using the Access Point Name parameter.
GPIB command: CALL:SERVice:PSData:APName:STATe
Access Point Name State
is set to
, you can specify one of the following APNs be sent in the Request PDP Context Activation message:
GPIB command: CALL:SERVice:PSData:APName[:VALue]
This setting controls whether the UE is assigned to CELL_DCH or CELL_FACH when a PDP Context is initiated or when an incoming 2-box PS data cell change order occurs.
must be set to
Signaling + Traffic
to use the CELL_FACH mode.