Downlink Channel Codes and Levels

 Last updated: October 19, 2012

 You can specify the channel code, state and level of most of the downlink channels generated by the test set (some are fixed). Some of the downlink channels can have a different code, state or level depending upon the state of the test set.



Downlink Channel Codes and Levels for each Test Set State
Operating Mode Call State Connection Type Codes

 State/Levels

FDD Test     FDD Test Operating Mode
Active Cell Idle   Shared DL Channel Codes Downlink Channel Levels
Connected non-HSDPA/ non-HSPA Shared DL Channel Codes , WCDMA DL Channel Codes WCDMA Connected DL Channel Levels
Connected HSDPA Shared DL Channel Codes , HSDPA/HSPA DL Channel Codes HSDPA Connected DL Channel Levels
Connected HSPA Shared DL Channel Codes , HSDPA/HSPA DL Channel Codes HSPA Connected DL Channel Levels

 Use the Downlink Channel Code Preset to easily configure the 3GPP TS 34.121-1 channel codes from the front panel.

 If the sum of the downlink channel levels is less than the cell power setting, Orthogonal Channel Noise Simulator (OCNS) power is automatically added.

 

 Downlink Channel Codes

 Downlink Channel Codes can not be changed in Active Cell operating mode (use Cell Off operating mode to change the active cell downlink channel codes). The downlink channel codes currently in use are displayed in the Downlink Code Channel Information window.

 Shared DL Channel Codes

 The CPICH OVSF/channelization code is fixed at 256,0.

 The P-CCPCH/SCH OVSF/channelization code is fixed at 256,1.

 WCDMA DL Channel Codes

 The method for setting downlink DPCH channel codes differs between the test application and lab application. The following table illustrates the valid channelization codes for each type of DPCH channel, and indicates the GPIB commands and front panel fields used to set the channelization codes, for both the test application and lab application (see How Do I Change Generator Information? to help you find these fields from the front panel).

 

 Downlink DPCH Channel Types vs. Channelization Code Selection
Downlink Channel Type Valid Channelization Code Test Application
Front Panel Setting and GPIB Command
Lab Application
Front Panel Setting and GPIB Command
Signalling Radio Bearers: (see Signalling Radio Bearer (SRB) Parameters )
2.2k DCCH 12/13/20/21/40/43/
58/126/127/142/
153/174/235/255
3.4k SRB Channelization Code,
CALL:SRBearer
DPCH 15 ksps (OVSF 256) Channelization Code, CALL:DPCHannel:KSPS15[:CCODe]:CODE
3.4k DCCH 12/13/20/21/40/43/
58/126/127/142/
153/174/235/255
3.4k SRB Channelization Code,
CALL:SRBearer
DPCH 15 ksps (OVSF 256) Channelization Code, CALL:DPCHannel:KSPS15[:CCODe]:CODE
13.6k DCCH 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
Radio Bearer Test Mode Reference Measurement Channels: (see Radio Bearer Test Mode )
12.2k RMC 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
64k RMC 6/10/12/14/16/18/
20/22/24/25/26/27
DPCH 64k RMC Channelization Code, CALL:DPCHannel:RMC64:CCODe DPCH 120 ksps (OVSF 32) Channelization Code, CALL:DPCHannel:KSPS120[:CCODe]:CODE
144k RMC 12/13 DPCH 144k RMC Channelization Code, CALL:DPCHannel:RMC144:CCODe

 DPCH 240 ksps (OVSF 16) Channelization Code, CALL:DPCHannel:KSPS240[:CCODe]:CODE

384k RMC 6 DPCH 384k RMC Channelization Code, CALL:DPCHannel:RMC384:CCODe DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE
33k No Coding RMC 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
12.2k UL/64k DL AM RMC 6/10/12/14/16/18/
20/22/24/25/26/27
DPCH 64k RMC Channelization Code, CALL:DPCHannel:RMC64:CCODe DPCH 120 ksps (OVSF 32) Channelization Code, CALL:DPCHannel:KSPS120[:CCODe]:CODE
12.2k UL/144k DL AM RMC 12/13 DPCH 144k RMC Channelization Code, CALL:DPCHannel:RMC144:CCODe

 DPCH 240 ksps (OVSF 16) Channelization Code, CALL:DPCHannel:KSPS240[:CCODe]:CODE

12.2k UL/384k DL AM RMC 6 DPCH 384k RMC Channelization Code, CALL:DPCHannel:RMC384:CCODe DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE
64k UL/384k DL AM RMC 6 DPCH 384k RMC Channelization Code, CALL:DPCHannel:RMC384:CCODe DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE
AMR Radio Access Bearer: (see AMR Setup )
12.2k Voice 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
10.2k Voice 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
7.95k Voice 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
7.4k Voice 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
6.7k Voice 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
DPCH 12.2k RMC & 33k NC RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
5.9k Voice 12/13/20/21/40/43/
58/126/127/142/
153/174/235/255
3.4k SRB Channelization Code,
CALL:SRBearer
DPCH 15 ksps (OVSF 256) Channelization Code, CALL:DPCHannel:KSPS15[:CCODe]:CODE
5.15k Voice 12/13/20/21/40/43/
58/126/127/142/
153/174/235/255
3.4k SRB Channelization Code,
CALL:SRBearer
DPCH 15 ksps (OVSF 256) Channelization Code, CALL:DPCHannel:KSPS15[:CCODe]:CODE
4.75k Voice 12/13/20/21/40/43/
58/126/127/142/
153/174/235/255
3.4k SRB Channelization Code,
CALL:SRBearer
DPCH 15 ksps (OVSF 256) Channelization Code, CALL:DPCHannel:KSPS15[:CCODe]:CODE
Circuit Switched Data Radio Access Bearers: (see Circuit Switched Data Service )
14.4k UL/14.4k DL CS Data RAB 6/9/10/20/29/37/
45/54/60/63/70/76/
87/93/112/118
Not applicable to the test application. DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE
57.6k UL/57.6k DL CS Data RAB 6/10/12/14/16/18/
20/22/24/25/26/27
Not applicable to the test application. DPCH 120 ksps (OVSF 32) Channelization Code, CALL:DPCHannel:KSPS120[:CCODe]:CODE
64k UL/64k DL CS Data RAB 6/10/12/14/16/18/
20/22/24/25/26/27
DPCH 64k RMC Channelization Code, CALL:DPCHannel:RMC64:CCODe (feature license required) DPCH 120 ksps (OVSF 32) Channelization Code, CALL:DPCHannel:KSPS120[:CCODe]:CODE
GPRS Radio Access Bearers: (see Packet Switched Data )
64k UL/64k DL PS Data RAB 6/10/12/14/16/18/
20/22/24/25/26/27
Not applicable to the test application. DPCH 120 ksps (OVSF 32) Channelization Code, CALL:DPCHannel:KSPS120[:CCODe]:CODE
64k UL/384k DL RMC 6 Not applicable to the test application. DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE
64k UL/384k DL PS Data RAB 6 Not applicable to the test application. DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE
128k UL/384k DL PS Data RAB * 6 Not applicable to the test application. DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE
384k UL/384k DL PS Data RAB 6 Not applicable to the test application. DPCH 480 ksps (OVSF 8) Channelization Code, CALL:DPCHannel:KSPS480[:CCODe]:CODE

 HSDPA/HSPA DL Channel Codes

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

 The method for setting downlink DPCH channel codes used during HSDPA and HSPA connections differs between the test application and lab application. The following table illustrates the valid channelization codes for each type of DPCH channel used during HSDPA and HSPA connections, and indicates the GPIB commands and front panel fields used to set the channelization codes, for both the test application and lab application (see How Do I Change Generator Information? to help you find these fields from the front panel).

HSDPA/HSPA Downlink DPCH Channel Types vs. Channelization Code Selection
Downlink Channel Type Valid Channelization Codes Test Application
Front Panel Setting and GPIB Command
Lab Application
Front Panel Setting and GPIB Command
Radio Bearer Test Mode Reference Measurement Channels: (see Radio Bearer Test Mode )
12.2k RMC + HSDPA 20/29/37/45/54 HSDPA/HSPA DPCH 12.2k RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe:HSDPa HSDPA/HSPA DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE:HSDPa

 12.2k RMC + HSPA

20/29/37/45/54 HSDPA/HSPA DPCH 12.2k RMC Channelization Code, CALL:DPCHannel:RMC12:CCODe:HSDPa HSDPA/HSPA DPCH 30 ksps (OVSF 128) Channelization Code, CALL:DPCHannel:KSPS30[:CCODe]:CODE:HSDPa
GPRS Radio Access Bearers: (see Packet Switched Data )
3.4k SRB used while on an HSDPA or HSPA packet data connection 40/43/58 Not applicable to the test application.  HSDPA/HSPA DPCH 15 ksps (OVSF 256) Channelization Code, CALL:DPCHannel:KSPS15[:CCODe]:CODE:HSDPa

 You can also set the channel code for the following downlink HSDPA and HSPA channels:

 Downlink Channel Code Preset

 The downlink channel code preset (front panel: DL Chan Code Preset Configs ) allows you to configure the test set for 3GPP TS 34.121-1 channel code much easier (the DL Channel Code Preset Configurations are only available from the front panel; there are no GPIB commands to configure these presets).

 The Operating Mode must be set to Cell Off before selecting one of the DL channel code preset configurations.

 DL Channel Code Preset Configurations from 3GPP TS 34.121-1
  34.121 Table E.6.1.1(Non-HSDPA) 34.121 Tables E.6.2.1,2(HSDPA 10 HS-PDSCHs) 34.121 Tables E.6.2.3,4(HSDPA 15 HS-PDSCHs) 34.121 Tables E.6.3.1,2(E-DCH 5 HS-PDSCHs)
Shared DL Channel Codes

 S-CCPCH Channelization Code

 2

 2

 2

 2

 PICH Channelization Code

 2

 2

 2

 2

 AICH Channelization Code

 3

 3

 3

 3

 WCDMA DL Channel Codes

 DPCH 15 ksps (OVSF 256) Channelization Code

 192

 192

 14

 192

 DPCH 30 ksps (OVSF 128) Channelization Code

 96

96 7 96

 DPCH 120 ksps (OVSF 32) Channelization Code

 24

 

 

 

 DPCH 240 ksps (OVSF 16) Channelization Code

 12

 

 

 

 DPCH 480 ksps (OVSF 8) Channelization Code

 6

 

 

 

 HSDPA/HSPA DL Channel Codes

 HSDPA/HSPA (F-)DPCH 15 ksps (OVSF 256) Code

 

 192

14 192

 HSDPA/HSPA DPCH 30 ksps (OVSF 128) Code

 

 96

7 96

 E-AGCH Channelization Code

 

 

 

 14

 E-HICH/E-RGCH Channelization Code

 

 

 

 6

 RB Test Mode First HS-PDSCH Channel Code

 

 1

 1

 1

 HS-SCCH 1 to 4 Channelization Codes

 

 2,3,6,7

2,3 2,3

 OCNS Codes

 Cell 1 WCDMA OCNS 1 to 16 Channelization Codes

 2, 11, 17, 23, 31, 38, 47, 55, 62, 69, 78, 85, 94, 125, 113, 119

 

 

 

 Cell 1 HSDPA/HSPA OCNS 1 to 6 Channelization Codes

 

 122 to 127

 6

 122 to 127

 DL Channel Configuration

 Conn S-CCPCH Config

 On

 On

 On

 On

 HS-SCCH 1 to 4 Channel Config States

 

 On, On, On, On

 On, On, Off, Off

 On, On, Off, Off

 HSDPA/HSPA OCNS 1 to 6 Channel Config States

 

 On, On, On, On, On, On

 On, Off, Off, Off, Off, Off

 On, On, On, On, On, On

 HSDPA Connected DL Channel Levels

 HSDPA Cell 1 Connected HS-SCCH 3 Level

 

 

 Off

 Off

 HSDPA Cell 1 Connected HS-SCCH 4 Level

 

 

 Off

 Off

 HSPA Connected DL Channel Levels

 HSPA Cell 1 Connected HS-SCCH 3 Level

 

 

 Off

 Off

 HSPA Cell 1 Connected HS-SCCH 4 Level

 

 

 Off

 Off

HSDPA RB Test Settings

 RB Test HS-DSCH Configuration Type

 

 User Defined

 User Defined

 User Defined

 RB Test User Defined Number of Active HS-PDSCHs

 

 10

15 5
 DL Channel Code Preset Configuration for Compressed Mode

 

Compressed Mode with 384k DL DPCH(Non-HSDPA)

 Shared DL Channel Codes

 S-CCPCH Channelization Code

 7

 PICH Channelization Code

 16

 AICH Channelization Code

 10

 WCDMA DL Channel Codes

 DPCH 15 ksps (OVSF 256) Channelization Code

 12

 DPCH 30 ksps (OVSF 128) Channelization Code

 9

 DPCH 480 ksps (OVSF 8) Channelization Code

 6

OCNS Codes

 Cell 1 WCDMA OCNS 1 to 16 Channelization Codes

 2, 11, 17, 23, 31, 38, 47, 55, 62, 69, 78, 85, 94, 92, 88, 90

 DL Channel Configuration

 Conn S-CCPCH Config

 On

 

 Downlink Channel Levels

 The relative level of all downlink channels can be individually set or turned off (except that the P-CCPCH and the SCH are time multiplexed, and use the same level for both channels). The level of each active channel is a fraction of the Cell Power (Îor) setting, expressed in dB. If the summed level of all channels is less than one, the orthogonal coded noise source (OCNS) is turned on to account for the difference (see Orthogonal Channel Noise Simulator (OCNS) ).

 The downlink code channel levels currently in use (as well as the "desired" levels) are displayed in the Downlink Code Channel Information screen.

 The downlink channel levels for idle mode (no DPCH is present) may be different than the levels used during a call (DPCH is present). Thus, there are two different level settings for the downlink channels in active cell operating mode: Downlink Channel Levels and Connected DL Channel Levels .

 Considerations When Setting Code Channel States and Levels

 

 Downlink Channel Levels

 The Downlink Channel Levels set of power levels is used when RRC State is Idle or CELL_FACH .

 These levels cannot be changed in the Active Cell operating mode. You can query these settings via GPIB and view them on the front panel during Active Cell mode operation, but attempting to change the levels during Active Cell mode operation results in an error message (use the Cell Off operating mode to change the active cell downlink channel levels).

 

 Connected DL Channel Levels

 The Connected DL Channel Levels are used when RRC State is CELL_DCH . These levels are applied after the RRC Connection Setup message is sent by the test set during the RRC Connection Setup Procedure , directing the UE to go into CELL_DCH (i.e. once a DPCH has been established). When the DPCH channel is released, the test set transitions back to the Downlink Channel Levels set.

 These levels can be changed in any operating mode, including Active Cell . This allows you to vary the relative channel levels while a call is connected in order to test the UE's response.

 These settings specify the connected downlink channel levels relative to Cell Power (Îor).

 WCDMA Connected DL Channel Levels

 HSDPA Connected DL Channel Levels

 These settings are only applicable to the lab application or feature-licensed test application.

 HSPA Connected DL Channel Levels

 These settings are only applicable to the lab application or feature-licensed test application.

Common HS-DSCH Channel Levels

These settings are only applicable to the lab application or feature-licensed test application.

Common E-DCH Channel Levels

These settings are only applicable to the lab application or feature-licensed test application.

 

 Orthogonal Channel Noise Simulator (OCNS)

 OCNS is used to simulate additional users on the downlink. OCNS is automatically enabled when the sum of the levels of all the enabled downlink physical channels is less than the cell power setting.

 Cell 1 OCNS is made up of the following 16 separate code channels: 2, 11, 17, 23, 31, 38, 47, 55, 62, 69, 78, 85, 94, 113, 119, and 125, with an OVSF of 128. The fraction of the composite OCNS power that is allocated to each of the code channels making up the composite OCNS are as specified by 3GPP TS 34.121 sE.3.6.

 Cell 2 OCNS ( lab application only ) consists of a single channel at OVSF 128,2.

 As individual downlink channel levels are adjusted, the composite OCNS level is automatically set to a value equal to the difference between the summed downlink channel levels and the cell power setting (when the sum of the downlink code channel levels is such that the composite OCNS is less than -30 dB, it is set to Off ).

 The OCNS currently in use (as well as the "desired" level) is displayed in the Downlink Code Channel Information window.

 GPIB command: CALL:OCNSource (query only)

 OCNS in HSDPA/HSPA

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

 When HSDPA or HSPA is active (see HSDPA Activation in FDD Test and HSDPA Activation in Active Cell ), the cell 1 OCNS is made up of the following 7 separate code channels: 122, 123, 124, 125, 126, and 127, with an OVSF of 128, rather than the code channels described in Orthogonal Channel Noise Simulator (OCNS) above. The fraction of the composite OCNS power that is allocated to each of the code channels making up the composite OCNS are as specified by 3GPP TS 34.121 sE.5.2.

 

 Antenna 2 S-CPICH Configuration

 The parameter specifies whether S-CPICH is transmitted on antenna 2 when Current MIMO Configuration Status is set to Active in Active Cell/FDD Test Operating Mode. If Antenna 2 S-CPICH Configuration is set to On , S-CPICH will be transmitted on antenna 2 and its scrambling code will be Serving Cell Primary Scrambling Code . If Antenna 2 S-CPICH Configuration is set to Off , S-CPICH will not be transmitted on antenna 2.

 If you want to change Ant2 S-CPICH Cfg to Off , ensure that:

 This setting can only be set when the Call/Data Status is Idle .

 GPIB Command: CALL:ANTenna2:CPIChannel:SECondary:CONFig:STATe

 CALL:FDDTest:ANTenna2:CPIChannel:SECondary:CONFig:STATe

 

Related Topics


 

Generator Information

 How Do I Change Generator Information?

 Cell Power and AWGN Power

 Signalling Radio Bearer (SRB) Parameters

 Active Cell Operating Mode

 Cell Off Operating Mode