Common HSUPA Parameters

Last updated: March 16, 2009

This section is only applicable to the lab application or feature-licensed test application.

• HSUPA TTI

  This setting controls the HSUPA TTI mode that will be configured. Two HSUPA TTI modes, 2ms TTI and 10ms TTI, are specified in the 3GPP Release 6 specifications. Support of 10ms TTI is mandatory for each UE, whereas support of 2ms TTI is an optional capability for each UE that is defined in terms of E-DCH category. So far, only UEs with E-DCH category 2, 4, 6 can support 2ms TTI mode (25.306 s5.1 Table 5.1g) 2ms TTI mode is used to to accelerate packet scheduling and reduce latency. The HSUPA TTI mode is signaled to the UE at call setup by the RRC message.

  GPIB Command: CALL:HSUPa:EDCHannel:TTI

• E-DPCCH/DPCCH Power Offset (DeltaE-DPCCH)

  This setting controls the value that is signaled in the E-DPCCH/DPCCH power offset RRC information element at call setup (also known as deltaE-DPCCH in L1). It is used by the UE to derive the Betaec value that is used to set the relative power of the E-DPCCH in the uplink, see 3GPP TS 25.213 s4.2.1.3 and UE Target Power in HSPA .

  GPIB command: CALL:HSUPa:EDPCchannel[:DPCChannel]:POFFset

  This setting can only be changed when the connection status is idle.

• Happy Bit Delay Condition

  This setting controls the length of the Happy Bit Delay Condition (see 3GPP TS 25.321 s 11.1.8.5 and 3GPP TS 25.331 s 10.3.6.98) duration.

  This setting can only be changed when the connection status is idle.

  This setting is only applicable to the lab application.

  GPIB command: CALL:HSUPa:HBIT:DCONdition

• Happy Bit Averaging Period

  This setting controls the averaging period used to calculate the Happy Bit Ratio . Changing this setting causes the Happy Bit Ratio result for the current averaging period to be NaN and also causes the averaging period to restart.

  This setting is only applicable to the lab application.

  GPIB command: CALL:HSUPa:HBIT:APERiod

• E-TFCI Table Index (10 ms TTI)

  This setting determines which E-DCH Transport Block Size Table (in 3GPP TS 25.321 Annex B) the UE is instructed to use when HSUPA TTI is set to 10 ms:

  • 0: B.3 10ms TTI E-DCH Transport Block Size Table 0
  • 1: B.4 10ms TTI E-DCH Transport Block Size Table 1

  GPIB command: CALL:HSUPa:ETFCi:TINDex

  This setting can only be changed when the connection status is idle.

• E-TFCI Table Index (2 ms TTI)

  This setting determines which E-DCH Transport Block Size Table (in 3GPP TS 25.321 Annex B) the UE is instructed to use when HSUPA TTI is set to 2 ms:

  • 0: B.3 2ms TTI E-DCH Transport Block Size Table 0
  • 1: B.4 2ms TTI E-DCH Transport Block Size Table 1

  GPIB command: CALL:HSUPa:ETFCi:TINDex:MS2

  This setting can only be changed when the connection status is idle.

• E-DCH Minimum Set E-TFCI Information State

  This setting controls whether the E-DCH minimum set E-TFCI IE is signaled to the UE during HSPA call setup. The default value is set to match 3GPP TS 34.108 s9.1 and s9.2.

  GPIB Command: CALL:HSUPa:EDCHannel:ETFCi:MSET:STATe

  This setting can only be changed when the connection status is idle.

• E-DCH Minimum Set E-TFCI (10ms TTI)

  This setting controls the value for the E-DCH Minimum Set E-TFCI parameter that is signaled to the UE at call setup when E-DCH Minimum Set E-TFCI Information State is On and HSUPA TTI is set to 10 ms. This parameter essentially sets a minimum serving grant that the UE will assume is always available to it regardless of what the network signals to it over the E-AGCH or E-RGCH.

  GPIB command: CALL:HSUPa:EDCHannel:ETFCi:MSET

  This setting can only be changed when the connection status is idle.

• E-DCH Minimum Set E-TFCI (2ms TTI)

  This setting controls the value for the E-DCH Minimum Set E-TFCI parameter that is signaled to the UE at call setup when E-DCH Minimum Set E-TFCI Information State is On and HSUPA TTI is set to 2 ms. This parameter essentially sets a minimum serving grant that the UE will assume is always available to it regardless of what the network signals to it over the E-AGCH or E-RGCH.

  GPIB command: CALL:HSUPa:EDCHannel:ETFCi:MSET

  This setting can only be changed when the connection status is idle.

• Reference E-TFCI Power Offset Control

  If this parameter is set to Predefined, Predefined Reference E-TFCI Power Offsets is used to configure the reference E-TFCI and power offset for the UE.If this parameter is set to Manual, the settings "Reference E-TFCI 1 to 8 States", "Reference E-TFCI" and "Reference E-TFCI Power Offset" are used to configure the reference E-TFC table for the UE.

  GPIB Command: CALL:HSUPa:ETFCi:POFFsets:REFerence:CONTrol

• Predefined Reference E-TFCI Power Offsets

  The reference E-TFCI power offsets, which are communicated to the UE at call setup, specify a set of E-TFCI and E-DPDCH/DPCCH power offset pairs. An E-TFCI value has a one-to-one correspondence with an E-DCH block size, so the network is essentially defining the Betaed value that the UE shall use when transmitting that block size. There are 128 possible E-TFCI values, but the network can only signal a maximum of 8 E-TFCI/Power Offset pairs in the call setup signaling. These are known as the Reference E-TFCIs. The UE uses an interpolation algorithm to determine the power offsets for the remaining E-TFCIs.

  Definition 34108-01: 34.108 v7.0.0 s9.1

  E-TFCI	Power Offset
  11	4
  83	16

  Definition 34108-02: 34.108 v7.0.0 s9.2

  E-TFCI	Power Offset
  11	4

  Definition 34121-01: 34.121 v7.4.0 Table 5.2B.2

  E-TFCI	Power Offset
  11	4
  67	18
  71	23
  75	26
  81	27

  Definition 34121-02: 34.121 v7.4.0 Table 5.2B.3

  E-TFCI	Power Offset
  11	4
  92	18

  GPIB command: CALL:HSUPa:ETFCi:POFFsets:REFerence

  This setting can only be changed when the connection status is idle.

• Scheduling Information Periodicity (No Grant)

  This setting controls the length of the MAC-e periodic Scheduling Information trigger T_SING (see 3GPP TS 25.321 s11.8.1.6.1). This trigger is active when the UE's Serving Grant is set to Zero_Grant. When T_SING expires, the UE attemps to transmit Scheduling Information in a MAC-e PDU unless it has any data waiting to be transmitted in its buffer, in which case the no Scheduling Information is transmitted.

  Available settings for this parameter include No Report ( NREPort ), Every E-DCH TTI ( EETTi ), and at various TTI intervals.The 4 ms TTI is not supported on the E-DCH, but it is available as an option for this parameter. This is made due to the fact that 3GPP TS 23.331 s10.3.6.99 states that "if the Periodicity is set to 4 ms and the E-DCH is set to 10 ms, the UE shall interpret the periodicity value as 10 ms."

  Scheduling Information can be transmitted due to causes other than the T_SING trigger, see 3GPP TS s11.8.1.3 for more information.

  This setting can only be changed when the connection status is idle.

  This setting is only applicable to the lab application. This setting is fixed in the test application to No Report.

  GPIB command: CALL:HSUPa:SIPeriod:NGRant

• Scheduling Information Periodicity (Grant)

  This setting controls the length of the MAC-e periodic Scheduling Information trigger T_SIG (see 3GPP TS 25.321 s11.8.1.6.2). This trigger is active when the UE's Serving Grant is not set to Zero_Grant. When T_SIG expires, the UE attemps to transmit Scheduling Information in a MAC-e PDU unless it has any data waiting to be transmitted in its buffer, in which case the no Scheduling Information is transmitted.

  Available settings for this parameter include No Report ( NREPort ), Every E-DCH TTI ( EETTi ), and at various TTI intervals. The 4 ms TTI is not supported on the E-DCH, but it is available as an option for this parameter. This is available due to the fact that 3GPP TS 23.331 s10.3.6.99 states that "if the Periodicity is set to 4 ms and the E-DCH is set to 10 ms, the UE shall interpret the periodicity value as 10 ms."

  Scheduling Information can be transmitted due to causes other than the T_SIG trigger, see 3GPP TS s11.8.1.3 for more information.

  This setting can only be changed when the connection status is idle.

  This setting is only applicable to the lab application. This setting is fixed in the test application to No Report.

  GPIB command: CALL:HSUPa:SIPeriod:GRANt

• HARQ Maximum Number of Retransmissions

  This setting controls the maximum number of retransmissions a HARQ process in the UE will perform for a block of data before moving on to a new block of data.

  This setting can only be changed when the connection status is idle.

  GPIB command: CALL:HSUPa:HARQ:RETRans:MAXimum

• E-HICH Behavior

  This setting controls what the test set sends on the E-HICH channel.

  • When set to Active , the test set sends an Ack if it received a block on the E-DPDCH that passed its CRC check or a Nack if it received a block that failed its CRC check.
  • When set to All Nacks , the test set always sends a Nack on the E-HICH regardless of whether the block passed its CRC check. While operating in this mode, the MAC-e/es layer in the test set does not pass up any blocks to the MAC-d layer. Consequently, any active PS data connection will eventually drop due to an unrecoverable RLC error.
  • When set to All Acks , the test set always sends an Ack on the E-HICH regardless of whether the block passed its CRC check. While operating in this mode, the MAC-e/es layer in the test set only passes up blocks to the MAC-d layer that pass their CRC check.

  Regardless of how this setting is configured, the test set always sends a DTX on the E-HICH using an alternate E-HICH signature (as described in HSPA Downlink Channel Details ) if the UE did not transmit a block during a particular frame.

  GPIB command: CALL[:CELL]:EHIChannel:BEHavior