Agilent Technologies Home Page 8960 Series 10 Wireless Communications Test Set
- +
Home | Product Web Site | Contact Us
+
- -
+ -
8960 W-CDMA/HSPA Online User's Guide
E1963A, E6703E
Search this guide for     
search tips


Feedback
Did the information on this web page help answer your question or solve a problem?

Yes
No
Did not apply

Please provide additional comments about this page.
(Optional, 255 character max)


Email address (optional):

Privacy Notice: We will not sell or give away your email address to any third party.

 

HSDPA PS Data Setup

Last updated: March 19, 2009

This section is only applicable to the lab application.

  • PS Data Configuration Type

    This parameter controls how the HS-DSCH is configured. There are three settings:

    • CQI Value

      This setting uses the value assigned to CQI Value (separate parameter) along with the Current UE HS-DSCH Category to automatically configure the HS-DSCH based on tables defined in 3GPP TS 25.214. In order for the test set to accept this setting, the MAC-hs block size must be large enough to carry at least a single MAC-d PDU

    • Reported CQI

      This setting is similar to the CQI Value setting except that the test set uses the UE reported CQI values received on the HS-DPCCH channel rather than the assigned CQI Value .

      The test set continually adjusts the HS-DSCH configuration to match the CQI table in 3GPP TS 25.214 that corresponds to the Current UE HS-DSCH Category. If the test set has not yet received a CQI report from the UE, it uses a CQI value of 8 to configure the HS-DSCH each time a call is connected. Note: The test set cannot receive CQI reports if the CQI Feedback Cycle (k) is set to zero.

      The test set ensures that the MAC-hs block size is large enough to contain at least one MAC-d PDU. Therefore, the smallest CQI value the test set uses for a 336 bit MAC-d PDUs is 5 and the smallest CQI value the test set uses for 656 bit MAC-d PDUs is 8 regardless of whether the UE reports smaller CQI values.

    • User Defined

      When this setting is selected, the test set applies the user defined PS data parameters ( PS Data User Defined Active HS-PDSCHs , PS Data User Def Transport Block Size Index , and PS Data User Defined Modulation Type ) rather than automatically configuring them as is done when the PS Data Configuration Type is set to CQI Value or Reported CQI . In order for the test set to accept this setting, the MAC-hs block size must be large enough to carry at least a single MAC-d PDU

    GPIB command: CALL:HSDPa:SERVice:PSData:HSDSchannel:CONFig[:TYPE]

  • CQI Value

    This parameter is only applicable when the PS Data Configuration Type is set to CQI Value . The test set supports an HSDPA packet data connection as defined by 3GPP TS 34.108 6.10.2.4.5.1 (see GPRS Radio Access Bearer ). You must specify some aspects of the channel configuration by specifying a CQI Value .

    Based on the CQI Value setting and the Current UE HS-DSCH Category , the test set sets the MAC-hs 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. The test set uses the Current UE HS-DSCH Category to set the inter-TTI interval, number of HARQ processes, and IR buffer size (N IR ) as described in GPRS Radio Access Bearer .

    CQI Value cannot be set to 7 or less if PS Data User Defined Active HS-PDSCHs is set to 656 bits (because doing so would cause the MAC-hs transport block size to be too small to carry even a single MAC-d PDU). The number of HS-PDSCHs specified by the CQI Value , when added to the PS Data First HS-PDSCH Channel Code cannot exceed 15 (otherwise the HS-PDSCHs would collide with the downlink OCNS channels).

    Note that when you select a CQI Value that is defined by 3GPP TS 25.214 to have a non-zero "Reference power adjustment", the test set decreases the power present in the HS-PDSCHs accordingly (as expected, throughput no longer increases once you pass this point in the CQI table; rather, throughput decreases as HS-PDSCH power decreases). This change in power is reflected in the Conn Desired column of the Downlink Code Channel Information screen. For example, for a category 12 UE, if you set CQI Value to 18 , the power in the HS-PDSCHs is reduced from the HSDPA Cell 1 Connected HS-PDSCHs Level (Sum) setting of -3 dB to -6 dB.

    CQI Value can be set between 5 and 30. The following table, MAC-hs and IP Bit Rates (kbps) versus CQI Value and UE Category , summarizes the MAC-hs and IP bit rates achieved for each CQI Value , based on UE category.

    The MAC-hs bit rate is determined by multiplying the MAC-hs block size by the number of MAC-hs blocks transmitted per second. If inter-TTI interval * number of HARQ processes < 6, the number of MAC-hs blocks transmitted in 12 ms is equal to the number of HARQ processes, and the following formula applies:

    MAC-hs bit rate = (MAC-hs block size in bits)*(number of HARQ processes)/12 ms

    The maximum theoretical IP bit rate is determined by multiplying the number of IP bits delivered in each MAC-hs block by the number of MAC-hs blocks transmitted per second. If inter-TTI interval * number of HARQ processes < 6, then the following formula applies:

    IP bit rate = FLOOR[((MAC-hs block size in bits) - (21 MAC-hs header bits))/(MAC-d PDU Size)]*(MAC-d PDU Size - 16 header bits)*(number of HARQ processes)/12 ms

    Note that although the bit rates are equal between categories 1/2, 3/4, and 5/6, due to the larger IR buffer size of categories 2, 4 and 6, in a network these categories may realize higher actual data rates.

    MAC-hs and IP Bit Rates (kbps) versus CQI Value and UE Category

    UE Category

    		1, 2 3, 4 5, 6 7, 8 11 12
    CQI Value MAC-hs (kbps) IP (kbps) MAC-hs (kbps) IP (kbps) MAC-hs (kbps) IP (kbps) MAC-hs (kbps) IP (kbps)
    MAC-d
    PDU Size = 336 bits    		 IP (kbps)
    MAC-d
    PDU Size = 656 bits    		 MAC-hs (kbps) IP (kbps) MAC-hs (kbps) IP (kbps)
    5 63 53 94 80 189 160 189 160 N/A 94 80 189 160
    6 77 53 115 80 231 160 231 160 N/A 115 80 231 160
    7 108 53 163 80 325 160 325 160 N/A 163 80 325 160
    8 132 107 198 160 396 320 396 320 320 198 160 396 320
    9 155 107 233 160 466 320 466 320 320 233 160 466 320
    10 210 160 316 240 631 480 631 480 320 316 240 631 480
    11 247 213 371 320 742 640 742 640 640 371 320 742 640
    12 290 267 436 400 871 800 871 800 640 436 400 871 800
    13 380 320 570 480 1140 960 1140 960 960 570 480 1140 960
    14 431 373 646 560 1292 1120 1292 1120 960 646 560 1292 1120
    15 553 480 830 720 1660 1440 1660 1440 1600 830 720 1660 1440
    16 594 533 891 800 1783 1600 1783 1600 1600 830 * 720 * 1660 * 1440 *
    17 698 640 1047 960 2095 1920 2095 1920 1920 830 * 720 * 1660 * 1440 *
    18 777 693 1166 1040 2332 2080 2332 2080 2240 830 * 720 * 1660 * 1440 *
    19 881 800 1322 1200 2644 2400 2644 2400 2560 830 * 720 * 1660 * 1440 *
    20 981 907 1472 1360 2944 2720 2944 2720 2560 830 * 720 * 1660 * 1440 *
    21 1092 1013 1639 1520 3277 3040 3277 3040 2880 830 * 720 * 1660 * 1440 *
    22 1195 1120 1792 1680 3584 3360 3584 3360 3200 830 * 720 * 1660 * 1440 *
    23 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 4860 4480 4480 830 * 720 * 1660 * 1440 *
    24 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 5709 5280 5440 830 * 720 * 1660 * 1440 *
    25 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 7206 6720 6720 830 * 720 * 1660 * 1440 *
    26 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 7206 * 6720 * 6720 * 830 * 720 * 1660 * 1440 *
    27 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 7206 * 6720 * 6720 * 830 * 720 * 1660 * 1440 *
    28 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 7206 * 6720 * 6720 * 830 * 720 * 1660 * 1440 *
    29 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 7206 * 6720 * 6720 * 830 * 720 * 1660 * 1440 *
    30 1195 * 1120 * 1792 * 1680 * 3584 * 3360 * 7206 * 6720 * 6720 * 830 * 720 * 1660 * 1440 *
    * denotes that a "Reference power adjustment" is specified by the CQI Value (in other words, although the bit rate is the same as the bit rate for the preceding CQI Value , the power in the HS-PDSCHs is reduced).
    Bold font denotes 16QAM modulation.

    GPIB command: CALL:HSDPa:SERVice:PSData:CQI[:VALue]

  • PS Data User Defined Active HS-PDSCHs

    Sets the number of HS-PDSCHs transmitted by the test set. This setting affects the transport block size (see PS Data User Def Transport Block Size Index ). You can change this setting while on a connection.

    The number of HS-PDSCHs specified by this setting, when added to the PS Data First HS-PDSCH Channel Code cannot exceed 15 (otherwise the HS-PDSCHs would collide with the downlink OCNS channels).

    This parameter is only applicable when the PS Data Configuration Type is set to User Defined .

    GPIB command: CALL:HSDPa:SERVice:PSData:UDEFined:HSPDschannel:COUNt

  • PS Data User Def Transport Block Size Index

    Sets k i (transport block size index) as described in 3GPP TS 25.321 s9.2.3. You can change this setting while on a connection.

    You cannot directly set the HS-DSCH (MAC-hs) transport block size. Rather, you must set the PS Data User Defined Active HS-PDSCHs , PS Data User Defined Modulation Type , and PS Data User Def Transport Block Size Index . The test set then calculates the HS-DSCH transport block size from these three settings. You can query the transport block size using the CALL:STATus:HSDSchannel:TBSize? command.

    3GPP TS 25.321 Annex A provides a mapping of the index k t to HS-DSCH transport block size. 25.321 s9.2.3.1 specifies that k t = k i + k 0,i . 25.321 Table 9.2.3.1 provides values for k 0,i for different modulation types and number of active HS-PDSCHs. Thus, the HS-DSCH transport block size can be directly determined from the modulation type, number of active HS-PDSCHs, and transport block size index. For example, for a modulation type of 16QAM and 5 HS-PDSCHs, k 0,i = 131. Choosing a value of k i = 48 results in a value of 179 for k t , which is an HS-DSCH transport block size of 7298 bits.

    Note, if you set PS Data User Def Transport Block Size Index to a value that results in a transport block size that exceeds the maximum value for the Current UE HS-DSCH Category (see 3GPP TS 25.306 Table 5.1a), the test set will post a warning, but will still transmit using the requested block size. Transmitting too large of a block to the UE will likely result in undesirable behavior (the UE may stop its HS-DSCH reception altogether, and you may need to end and re-establish the connection with a smaller block size).

    Note, the test set ensures that the transport block size index does not cause the MAC-hs to become too small to carry a single MAC-d PDU (configured using the PS Data HS-DSCH MAC-d PDU Size parameter). Therefore, if a change is made to this parameter that results in too small of MAC-hs block size it will be rejected by the test set.

    GPIB command: CALL:HSDPa:SERVice:RBTest:UDEFined:TBSize:INDex

    This parameter is only applicable when the PS Data Configuration Type is set to User Defined .

    GPIB command: CALL:HSDPa:SERVice:PSData:UDEFined:TBSize:INDex

  • PS Data User Defined Modulation Type

    Sets the modulation type used on the HS-PDSCHs. This setting affects the transport block size (see PS Data User Def Transport Block Size Index ). You can change this setting while on a connection.

    Note, not all UE categories support 16QAM. If you set PS Data User Defined Modulation Type to 16QAM when Current UE HS-DSCH Category is reporting a category that does not support 16QAM (see 3GPP TS 25.306 Table 5.1a), the test set will post a warning, but will still transmit using 16QAM modulation.

    Note, if you set PS Data User Defined Modulation Type to a value that results in a transport block size that exceeds the maximum value for the Current UE HS-DSCH Category (see 3GPP TS 25.306 Table 5.1a), the test set will post a warning, but will still transmit using the requested block size. See PS Data User Def Transport Block Size Index for more details.

    This parameter is only applicable when the PS Data Configuration Type is set to User Defined .

    GPIB command: CALL:HSDPa:SERVice:PSData:UDEFined:MODulation[:TYPE]

  • PS Data HS-DSCH MAC-d PDU Size

    This parameter specifies the size of the MAC-d PDU that is used on the DTCH that is mapped to the HS-DSCH for an HSDPA PS data connection. The DTCH is the logical channel that carries the downlink user traffic data (for example, IP datagrams).

    Some UEs require a 656 bit MAC-d PDU size to achieve maximum data throughput (because sending fewer blocks reduces the load on the UE's CPU). 3GPP TS 34.108 s6.10.2.4.5.1 lists 656 bits as an alternate MAC-d PDU size. PS Data HS-DSCH MAC-d PDU Size cannot be changed to 656 bits if PS Data Configuration Type is set to 7 or less (because doing so would cause the MAC-d PDU to be too large for the MAC-hs block).

    This parameter can only be changed when connection status is idle.

    GPIB command: CALL:HSDPa:SERVice:PSData:ITTI[:INTerval]:MINimum:CONTrol:AUTO

  • PS Data Minimum Inter-TTI Interval

    This parameter sets the control state and value of the of the minimum inter-TTI interval used on the downlink.

    The control state can be set to Auto or Manual mode. When in Auto mode, the minimum inter-TTI used on an HSDPA or HSPA PS data call is the minimum inter-TTI supported by the Current UE HS-DSCH Category. When in set to a value (manual mode), this parameter controls the absolute inter-TTI interval.

    Note, not all UE categories support an inter-TTI interval of less than 3 (see 3GPP TS 25.306 Table 5.1a). If you set PS Data Minimum Inter-TTI Interval to a value that is not supported by the Current UE HS-DSCH Category , the test set will post a warning, but will still transmit using the specified inter-TTI interval.

    You can change this setting while on a connection.

    GPIB commands:
    Control State: "CALL:HSDPa:SERVice:PSData:ITTI[:INTerval]:MINimum:CONTrol:AUTO" on page 154
    Manual Setting: "CALL:HSDPa:SERVice:PSData:ITTI[:INTerval]:MINimum:MANual" on page 155

  • PS Data Number of HARQ Processes

    Sets the control state and value for the number of active HARQ processes.

    The control state can be set to Auto or Manual mode. When the control state is set to Auto, the number of HARQ processes active in the MAC-hs layer is set such that the fewest number of HARQ processes are used that will still result in maximum throughput based on the Current UE HS-DSCH Category. These values for the AUTO control state are as follows.

    UE Category

    Number of HARQ Processes

    (if the control state is AUTO)

    1

    2

    2

    2

    3

    3

    4

    3

    5

    6

    6

    6

    7

    6

    8

    6

    11

    3

    12

    6

    When the control state is set to a value (manual mode), the test set uses this value for the number of HARQ processes active in the MAC-hs layer.

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

    GPIB command:
    Control State: "CALL:HSDPa:SERVice:PSData:HARQ:PROCess:COUNt:CONTrol:AUTO" on page 153
    Manual Setting: "CALL:HSDPa:SERVice:PSData:HARQ:PROCess:COUNt:MANual" on page 153

  • PS Data UE IR Buffer Allocation

    Controls how the IR buffer size for each active HARQ process is determined.

    When PS Data UE IR Buffer Allocation is set to Implicit , the total IR buffer size for the Current UE HS-DSCH Category ("total number of soft channel bits" in 3GPP TS 25.306 Table 5.1a) is divided equally among the active HARQ processes. Using this setting helps ensure that the HSDPA connection will be successfully established, as the IR buffer size used by the test set is automatically set to match the current UE category. However, to configure the size of the IR buffer allocated to each HARQ process in the user defined downlink, you may need to set PS Data UE IR Buffer Allocation to Explicit , and then set PS Data Explicit UE IR Buffer Size accordingly.

    When PS Data UE IR Buffer Allocation is set to Explicit , the IR buffer size allocated to each active HARQ process is determined directly by the PS Data Explicit UE IR Buffer Size setting. This setting allows you to allocate less than your UE's maximum total IR buffer size. Note that if you set the PS Data Explicit UE IR Buffer Size beyond your UE's capability (based on the number of HARQ processes), the HSDPA connection attempt will fail.

    This setting can only be changed when call status is idle.

    GPIB command: "CALL:HSDPa:SERVice:PSData:MS:IREDundancy:BUFFer:ALLocation" on page 155

  • PS Data Explicit UE IR Buffer Size

    When PS Data UE IR Buffer Allocation is set to Explicit , this setting determines the size of the IR buffer allocated to each HARQ process. The total IR buffer size is thus determined by multiplying the PS Data Explicit UE IR Buffer Size by the PS Data Number of HARQ Processes .

    Note, different UE categories support different total IR buffer sizes ("total number of soft channel bits" in 3GPP TS 25.306 Table 5.1a). If you set the total IR buffer size beyond the specified limit for the Current UE HS-DSCH Category , the test set will post a warning, but will still allocate the total IR buffer size you've set. This will cause the HSDPA connection attempt to fail. The limits for the IR buffer size based on the UE category are listed in the table below.

    UE Category

    		 IR Buffer Size Limit

    2

    28800

    3

    28800

    4

    38400

    5

    		 57600

    6

    67200

    7

    		 115200

    8

    		 134400

    11

    14400

    12

    28800

    The range for this setting is 800-16000 by step of 800, 17600-32000 by step of 1600, 36000-80000 by step of 4000, 88000-160000 by step of 8000, and 176000-304000 by step of 16000, as per 3GPP TS 25.331 s10.3.5.7a.

    This setting can only be changed when call status is idle.

    GPIB command: "CALL:HSDPa:SERVice:PSData:MS:IREDundancy:BUFFer:SIZE[:EXPLicit]" on page 155

Top of pagetop of page     

+
Privacy Statement | Terms of Use | Webmaster  +  © Agilent 2000-2008
+