KPI measurement

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KPI measurement

  1. 1. KPI Measurement per Cell Description The measurement unit KPI Measurement per Cell is used to measure the KPI of the BSC. Measurement Object CELL Measurement Counter The following table lists the measurement counters related to KPI Measurement per Cell. Counter Refer to Section... K3100:CELL_KPI_IMM_ASS_REQ Immediate Assignment Requests K3101:CELL_KPI_IMM_ASS_CMD Immediate Assignment Commands K3000:CELL_KPI_SD_REQ SDCCH Seizure Requests K3001:CELL_KPI_SD_CONGEST Failed SDCCH Seizures due to Busy SDCCH K3003:CELL_KPI_SD_SUCC Successful SDCCH Seizures K3004:CELL_KPI_SD_TRAF_ERL Traffic Volume on SDCCH K3005:CELL_KPI_SD_AVAIL_NUM Available SDCCHs K3006:CELL_KPI_SD_CFG_NUM Configured SDCCHs K3020:CELL_KPI_TCH_REQ_SIG TCH Seizure Requests (Signaling Channel) K3021:CELL_KPI_TCH_CONG_SIG Failed TCH Seizures due to Busy TCH (Signaling Channel) K3023:CELL_KPI_TCH_SUCC_SIG Successful TCH Seizures (Signaling Channel) K3022:CELL_KPI_TCH_DROPS_SIG Call Drops on TCH (Signaling
  2. 2. Counter Refer to Section... Channel) K3024:CELL_KPI_TCH_TRAF_ERL_SIG Traffic Volume on TCH (Signaling Channel) K3010A:CELL_KPI_TCH_ASS_REQ_TRAF TCH Seizure Requests (Traffic Channel) K3011A:CELL_KPI_TCH_ASS_CONG_TRAF Failed TCH Seizures due to Busy TCH (Traffic Channel) K3013A:CELL_KPI_TCH_ASS_SUCC_TRAF Successful TCH Seizures (Traffic Channel) K3012A:CELL_KPI_TCH_STATIC_DROPS_TRAF Call Drops on TCH in Stable State (Traffic Channel) K3010B:CELL_KPI_TCH_HO_REQ_TRAF TCH Seizure Requests in TCH Handovers (Traffic Channel) K3011B:CELL_KPI_TCH_HO_CONGEST_TRAF Failed TCH Seizures in TCH Handovers due to Busy TCH (Traffic Channel) K3013B:CELL_KPI_TCH_HO_SUCC_TRAF Successful TCH Seizures in TCH Handovers (Traffic Channel) K3012B:CELL_KPI_TCH_HO_DROPS_TRAF Call Drops in TCH Handovers (Traffic Channel) K3014:CELL_KPI_TCH_TRAF_ERL_TRAF Traffic Volume on TCH K3015:CELL_KPI_TCH_AVAIL_NUM Available TCHs K3016:CELL_KPI_TCH_CFG_NUM Configured TCHs K3170:CELL_KPI_DUBAND_HO_REQ Dual-Band Handover Requests
  3. 3. Counter Refer to Section... K3173:CELL_KPI_DUBAND_HO_SUCC Successful Dual-Band Handovers K3041: CELL_TCH_OVERFLOW_RATE TCH Congestion Rate (Overflow) K3043: CELL_TCH_SEIZ_SUCC_RATE TCH Seizure Success Rate K3034: CELL_KPI_TCHH_TRAF_ERL TCHH Traffic Volume RK3255: CELL_TRX_CFG_AVAIL_RATE TRX Usability K3040: CELL_KPI_TCH_SUCC Successful TCH Seizures K3045: CELL_KPI_TCH_CONGESTION_RATE Congestion Ratio on TCH (All Channels Busy) K3173F: CELL_KPI_DUBAND_HO_FAI Failed Dual-Band Handovers RM3276: CELL_KPI_TCH_SUCC_SIG_TCHH Successful TCH Seizures (Signaling Channel) (TCHH) RM3176: CELL_KPI_TCH_SUCC_SIG_TCHF Successful TCH Seizures (Signaling Channel) (TCHF) RM3278: CELL_KPI_TCH_ASS_SUCC_TRAF_TCHH Successful TCH Seizures (Traffic Channel) (TCHH) RM3178: CELL_KPI_TCH_ASS_SUCC_TRAF_TCHF Successful TCH Seizures (Traffic Channel) (TCHF) RM3279: CELL_KPI_TCH_HO_SUCC_TRAF_TCHH Successful TCH Seizures in TCH Handovers (Traffic Channel) (TCHH) RM3179: CELL_KPI_TCH_HO_SUCC_TRAF_TCHF Successful TCH Seizures in TCH Handovers (Traffic Channel) (TCHF)
  4. 4. 1.K3100: CELL_KPI_IMM_ASS_REQ (Immediate Assignment Requests) Description To obtain the service from the BSS, an MS sends a CHAN REQ message on the RACH to the BTS. After receiving this message, the BTS sends a CHAN RQD message to the BSC to request a dedicated channel. This measurement provides the number of times that the BSC receives a CHAN RQD message. The value of this counter includes the number of requests for a channel due to different services except the PS service but excludes the number of CHAN REQ messages discarded during flow control. Unit Integer number. Measurement Point This counter is incremented by one after flow control when the BSC receives the CHANNEL REQUIRED message from the BTS. See measurement point A in Figure 1. Figure 1 Immediate assignment procedure Formula Immediate Assignment Requests = [Channel Requests (Circuit Service)] 2.K3101: CELL_KPI_IMM_ASS_CMD (Immediate Assignment Commands) Description In the immediate assignment procedure, the MS sends a CHAN REQ message to the BTS. After receiving the message, the BTS sends a CHAN RQD message to the BSC. After the BSC
  5. 5. receives the CHAN RQD message, the BSC assigns an activated signaling channel to the MS. If the BSC receives a CHAN ACT ACK message from the BTS, the signaling channel is ready for assignment. Then, the BSC sends an IMM ASS CMD message, requesting the MS to access the specified signaling channel. This signaling channel can be an SDCCH or a TCH. This counter includes the number of channel requests except for the PS service. Unit Integer number. Measurement Point This counter is measured at C when the BSC sends an IMM ASS CMD message, as shown in Figure 1. Figure 1 Immediate assignment procedure Formula Immediate Assignment Commands = [Immediate Assignment Commands (Circuit Service)] 3.K3000: CELL_KPI_SD_REQ (SDCCH Seizure Requests) Description In the immediate assignment procedure, the MS requests a channel from the BSS. In the incoming BSC handover procedure, the MSC requests the BSS to assign a channel to the MS; In the internal BSC handover procedure, the BSC requests the BSS to re-assign a channel to the MS. In the preceding procedures, this measurement provides the number of requests for an SDCCH after the BSC receives the request. Unit Integer number.
  6. 6. Measurement Point (1) In the immediate assignment procedure, this counter is incremented by one when the BSC receives a CHANNEL REQUIRED message requesting for an SDCCH from the BTS. This counter is measured at A, as shown in Figure 1. Figure 1 Immediate assignment procedure (2) In the internal SDCCH handover procedure, this counter is incremented by one when the target cell receives an Intercell Handover Request message from the originating cell. This counter is measured at A, as shown in Figure 2. Figure 2 Internal SDCCH handover procedure
  7. 7. (3) When the BSC receives a HANDOVER REQUEST message from another BSC, this counter is incremented by one if the handover occurs on the SDCCH. The counter is measured at A, as shown in Figure 3. Figure 3 External SDCCH handover procedure Formula SDCCH Seizure Requests = [Channel Assignment Requests in Immediate Assignment Procedure (SDCCH)] + [Internal Intra-Cell Handover Requests (SDCCH)] + [Incoming Internal Inter-Cell Handover Requests (SDCCH) (900/850-900/850)] + [Incoming Internal Inter-Cell Handover Requests (SDCCH) (1800/1900-1800/1900)] + [Incoming Internal Inter-Cell Handover Requests (SDCCH) (900/850-1800/1900)] + [Incoming Internal Inter-Cell Handover Requests (SDCCH) (1800/1900-900/850)] + [Incoming External Inter-Cell Handover Requests (SDCCH) (900/850-900/850)] + [Incoming External Inter-Cell Handover Requests (SDCCH) (1800/1900-1800/1900)] + [Incoming External Inter-Cell Handover Requests (SDCCH) (900/850-1800/1900)] + [Incoming External Inter-Cell Handover Requests (SDCCH) (1800/1900-900/850)] 4.K3001: CELL_KPI_SD_CONGEST (Failed SDCCH Seizures due to Busy SDCCH) Description
  8. 8. This measurement provides the number of failed SDCCH seizures due to no idle SDCCH when the MS or MSC requests an SDCCH from the BSS in an immediate assignment procedure or a handover procedure. Unit Integer number. Measurement Point (1) In the immediate assignment procedure, when the MS requests an SDCCH but the cell has no idle SDCCH available, this counter is incremented by one. See measurement point A in Figure 1. Figure 1 Immediate assignment procedure (2) In the internal handover procedure, if the handover occurs on the SDCCH, this counter is incremented by one when the MS fails to seize (grasp) an SDCCH in the target cell because of no idle SDCCH available. See measurement point A in Figure 2.
  9. 9. Figure 2 Internal SDCCH handover procedure (3) In the external handover procedure, if the handover occurs on the SDCCH, this counter is incremented by one when the MS fails to seize an SDCCH in the target cell because of no idle SDCCH available. See measurement point A in Figure 3.
  10. 10. Figure 3 External SDCCH handover procedure Formula Failed SDCCH Seizures due to Busy SDCCH = [Channel Assignment Failures (All Channels Busy or Channels Unconfigured) in Immediate Assignment Procedure (SDCCH)] + [Failed Internal Intra-Cell Handovers (No Channel Available) (SDCCH) per BSC] + [Failed Incoming Internal Intra-Cell Handovers (No Channel Available) (SDCCH) per BSC] + [Failed Incoming External Intra-Cell Handovers (No Channel Available) (SDCCH) per BSC] 5.K3003:CELL_KPI_SD_SUCC (Successful SDCCH Seizures) Description In an SDCCH immediate assignment procedure, the BTS sends a channel activation success message to the BSC. After receiving this message, the BSC regards that the assignment of SDCCH succeeds. In an SDCCH handover procedure, the BTS sends a handover detection message to the target cell. After receiving this message, the BSC regards that the assignment of SDCCH succeeds. This counter applies to the previous two cases. Unit Integer number. Measurement Point
  11. 11. In the immediate assignment of the SDCCH, when receiving the CHANNEL ACTIVATION ACKNOWLEDGE message from the BTS, the BSC measures the counter. See measurement point B in Figure 1. Figure 1 Immediate Assignment Procedure In the incoming BSC SDCCH handover procedure, when receiving the HANDOVER DETECTION message from the BTS, the BSC measures the counter. The measurement object is the target cell. See measurement point B in Figure 2. Figure 2 Internal SDCCH handover procedure
  12. 12. In the incoming internal inter-cell handover procedure (including intra-cell handover), when receiving the HANDOVER DETECTION message from the BTS, the BSC measures the counter. The measurement object is the target cell. See measurement point B in Figure 3. Figure 3 External SDCCH handover procedure Formula Successful SDCCH Seizures= [Channel Activation Attempts in Immediate Assignment Procedure (SDCCH)]- [CHAN ACTIV NACK Messages Sent by BTS in Immediate Assignment Procedure (SDCCH)]- [Channel Activation Timeouts in Immediate Assignment Procedure (SDCCH)] + [Internal Intra-Cell Handover Detection Messages Received by BSC (SDCCH)] + [Incoming Internal Inter-Cell Handover Detection Messages Received by BSC (SDCCH)] + [Incoming External Inter-Cell Handover Detection Messages Received by BSC (SDCCH)] 6.K3004: CELL_KPI_SD_TRAF_ERL (Traffic Volume on SDCCH) Description This measurement provides the traffic intensity on the SDCCH. After activating the SDCCHs, the BSC calculates the average number of busy SDCCHs at each sampling point in a granularity period. The sampling period is 1s. NOTE:
  13. 13. In normal cases, one-day traffic volume is the total of twenty-four 60-minute traffic volume and is not 24-hour traffic volume measured on the M2000. According to the traffic measurement on the M2000, 24-hour traffic volume is the same as 60-minute traffic volume in the case of uniform traffic volume. Unit Erl Measurement Point For details, see Measurement Point in Traffic Volume on Signaling Channels (SDCCH). Formula Traffic Volume on SDCCH = [Traffic Volume on Signaling Channels (SDCCH)] 7.K3005:CELL_KPI_SD_AVAIL_NUM (Available SDCCHs) Description This measurement provides the number of available SDCCHs in a cell in the BSC. The SDCCHs include those that are converted from dynamic TCHs. The value of this counter is the average number of available SDCCHs at each sampling point in the granularity period. Unit Integer number. Measurement Point The BSC collects the number of available SDCCHs each five seconds. At the end of the granularity period, the value of this counter is the result of dividing the accumulative value of each sampling point by the number of sampling times. Formula Available SDCCHs = [Mean Number of Available Channels (SDCCH)] 8.K3006:CELL_KPI_SD_CFG_NUM (Configured SDCCHs) Description This measurement provides the number of SDCCHs configured in a cell in the BSC. The SDCCHs include those that are converted from dynamic TCHs. The value of this counter is the average number of SDCCHs at each sampling point in the granularity period. Unit Integer number.
  14. 14. Measurement Point The BSC collects the number of configured SDCCHs per second. At the end of the granularity period, the value of this counter is the result of dividing the accumulative value of each sampling point by the number of sampling times. Formula Configured SDCCHs = [Mean Number of Dynamically Configured Channels (SDCCH)] 9.K3020: CELL_KPI_TCH_REQ_SIG (TCH Seizure Requests (Signaling Channel)) Description In the very early TCH assignment procedure, this measurement provides the number of CHAN RQD messages that the BTS receives from the BTS. Unit Integer number. Measurement Point After receiving a CHAN RQD message from the BTS, the BSC assigns a channel at A, as shown in the following figure. If the access cause is emergency call or call re-establishment, and the BSC supports very early TCH assignment, the BSC assigns a TCH to carry signaling. If no SDCCH is available and the SDCCH is not the only choice for location updating, the BSC automatically assigns a TCH to carry signaling, and this counter is incremented by one. Formula TCH Seizure Requests (Signaling Channel) = [Channel Assignment Requests in Immediate Assignment Procedure (TCH)]
  15. 15. 10. K3021: CELL_KPI_TCH_CONG_SIG (Failed TCH Seizures due to Busy TCH (Signaling Channel)) Description This measurement provides the number of times that the BSC has no TCH available in the very early assignment of the TCH. Unit Integer number Measurement Point The BSC receives the ASSIGNMENT REQUEST message from the MSC and the resources assigned by the message are used to establish the signaling connection. See measurement points G1-G6 C in Figure 1. The BSC will assign a channel after receiving the ASSIGNMENT REQUEST message. If no channel is available and the BSC does not support queuing or directed retry, the BSC measures the counter. If Mode Modify is performed during the assignment procedure, the CHANNEL MODE MODIFY message is sent to the MS. The MS performs Mode Modify and sends the CHANNEL MODE MODIFY ACKNOWLEDGE message to the BSC. When receiving this message, the BSC measures the counter if the Um interface channel mode IE is abnormal. After the BSC receives the ASSIGNMENT REQUEST message, if no channel is available and the BSC supports queuing, a timer is set to wait for an idle channel. If an idle channel exists before the timer expires, the BSC successfully assigns the channel. If no idle channels exist when the timer expires and directed retry is not supported, the BSC measures the counter. If the directed retry fails, the BSC measures the counter and sends the MSC an ASSIGNMENT FAILURE message to clear the connection when any of the following situations occurs: o The MRs reported by the MS have no target cell available. o Directed retry to another cell in the BSC. The source cell receives the Intercell Handover Reject message from the target cell. The measurement object is the originating cell. o Directed retry to another cell in the BSC. The handover fails and the MS reconnects to the original signaling channel. The measurement object is the source cell. o Directed retry to another cell in the BSC. The target cell response is not received within the scheduled time. The measurement object is the source cell.
  16. 16. o Directed retry to another cell in the BSC. The source cell receives the Inter Clear Request message from the target cell. This clear message is used to inform the source cell of the directed retry failure and to request the source cell to clear the connection. The measurement object is the source cell. o Directed retry to another cell in the BSC. The source cell sends the MS a HANDOVER COMMAND message, requesting the MS to access a new channel. If the source cell does not receive the Inter Clear Request from the target cell within the scheduled time, the BSC measures the counter. Figure 1 Assignment procedure Formula Failed TCH Seizures due to Busy TCH (Signaling Channel) = [TCH Channel Alloc Failed (No Usable Channel) Times In Imm Assignment]
  17. 17. 11. K3023: CELL_KPI_TCH_SUCC_SIG (Successful TCH Seizures (Signaling Channel)) Description In the very early TCH assignment procedure, this measurement provides the number of successful attempts to activate the TCHs assigned by the BSC. Unit Integer number. Measurement Point In the very early TCH assignment procedure, this counter is incremented by one when the BSC receives a CHANNEL ACTIVATION ACKNOWLEDGE message from the BTS. This counter is measured at B, as shown in Figure 1. Figure 1 Immediate Assignment Procedure Formula Successful TCH Seizures (Signaling Channel) = ([Channel Activation Attempts in Immediate Assignment Procedure (TCHF)] + [Channel Activation Attempts in Immediate Assignment Procedure (TCHH)]) - ([CHAN ACTIV NACK Messages Sent by BTS in Immediate Assignment Procedure (TCHF)] + [CHAN ACTIV NACK Messages Sent by BTS in Immediate Assignment Procedure (TCHH)] + [Channel Activation Timeouts in Immediate Assignment Procedure (TCHF)] + [Channel Activation Timeouts in Immediate Assignment Procedure (TCHH)]) 12. K3022:CELL_KPI_TCH_DROPS_SIG (Call Drops on TCH (Signaling Channel) Description
  18. 18. In the very early TCH assignment procedure, this measurement provides the number of call drops due to any cause on the established TCH carrying signaling. Unit Integer number. Measurement Point In the very early TCH assignment procedure, if the TCH is used to carry traffic, this counter is calculated at A1, A2, A3, and A4, as shown in Figure 1. Figure 1 Call drops in the immediate assignment (including very early assignment) procedure A1: Call Drops Due to ERR IND Received in Stable State, Call Drops Due to the ERR IND Received on the TRX in the Underlaid Subcell in Stable State, Call Drops Due to the ERR IND Received on the TRX in the Overlaid Subcell in Stable State A2: Call Drops Due to the CONN FAIL IND Received in Stable State, Call Drops Due to the CONN FAIL IND Received on the TRX in the Underlaid Subcell in Stable State, Call Drops Due to the CONN FAIL IND Received on the TRX in the Overlaid Subcell in Stable State A3: Call Drops Due to REL IND Received in Stable State, Call Drops Due to the REL IND Received on the TRX in the Underlaid Subcell in Stable State, Call Drops Due to the REL IND
  19. 19. Received on the TRX in the Overlaid Subcell in Stable State A4: Call Drops Due to No MRs from MS for a Long Time, Call Drops Due to No MR from the MS on the TRX in the Underlaid Subcell, Call Drops Due to No MR from the MS on the TRX in the Overlaid Subcell, Call Drops due to Abis Terrestrial Link Failure, Call Drops Due to Abis Terrestrial Link Failure on the TRX in the Underlaid Subcell, Call Drops Due to Abis Terrestrial Link Failure on the TRX in the Overlaid Subcell, Call Drops Due to Equipment Failure, Call Drops Due to TRX Failure in the Underlaid Subcell, Call Drops Due to TRX Failure in the Overlaid Subcell, Call Drops due to Resource Check, Call Drops Due to Resource Check on the TRX in the Underlaid Subcell, Call Drops Due to Resource Check on the TRX in the Overlaid Subcell A5: Clear Requests Sent on the A Interface A6: Call Drops Due to Forced Handover, Call Drops Due to Forced Handover on the TRX in the Underlaid Subcell, Call Drops Due to Forced Handover on the TRX in the Overlaid Subcell A10: Successful SDCCH Seizures (Call Type) Formula Call Drops on TCH (Signaling Channel) = [Call Drops on Signaling Channel] - [Call Drops on SDCCH] 13. K3024:CELL_KPI_TCH_TRAF_ERL_SIG (Traffic Volume on TCH (Signaling Channel)) Description The value of this counter is equal to the number of TCHs seized to carry signaling in the cell. In the very early assignment of TCHs, after the TCH for carrying signaling is activated, the number of TCHs is periodically collected. In a granularity period, the value of this counter is the result of dividing the total number of busy TCHs by the number of sampling times. Unit Erl. Measurement Point At the end of each granularity period, the average number of busy TCHs for carrying signaling is collected. Formula Traffic Volume on TCH (Signaling Channel) = [Traffic Volume of Signaling Channels (TCH)]
  20. 20. 14. K3010A:CELL_KPI_TCH_ASS_REQ_TRAF (TCH Seizure Requests (Traffic Channel)) Description This measurement provides the number of TCH (traffic channel) seizure requests received by the BSC from the MSC. Unit Integer number. Measurement Point In the assignment procedure, the BSC receives the ASSIGNMENT REQUEST message from the MSC and measures this counter if the required channel is the TCH. See measurement point A in Figure 1. Figure 1 Assignment procedure Formula TCH Seizure Requests (Traffic Channel) = [[Assignment Requests (Signaling Channel) TCH]+ [Assignment Requests (TCHF Only)]+ [Assignment Requests (TCHH Only)]+ [Assignment Requests (TCHF Preferred, Channel Type Unchangeable)]+ [Assignment Requests (TCHH Preferred, Channel Type Unchangeable)]+ [Assignment Requests (TCHF or TCHH, Channel Type Unchangeable)]+ [Assignment Requests (TCHF Preferred, Channel Type Changeable)]+ [Assignment Requests (TCHH Preferred, Channel Type Changeable)]+ [Assignment Requests (TCHF or TCHH, Channel Type Changeable)]]
  21. 21. 15. K3011A:CELL_KPI_TCH_ASS_CONG_TR AF (Failed TCH Seizures due to Busy TCH (Traffic Channel) ) Description This counter provides the number of failed TCH (traffic channel) seizures because no TCH is available. Unit Integer number Measurement Point See measurement points G1-G6 in Figure 1. The BSC will assign a channel after receiving the ASSIGNMENT REQUEST message. If no channel is available and the BSC does not support queuing or directed retry, the BSC measures the counter. If Mode Modify is performed during the assignment procedure, the CHANNEL MODE MODIFY message is sent to the MS. The MS performs Mode Modify and sends the CHANNEL MODE MODIFY ACKNOWLEDGE message to the BSC. When receiving this message, the BSC measures the counter if the Um interface channel mode IE is abnormal. After the BSC receives the ASSIGNMENT REQUEST message, if no channel is available and the BSC supports queuing, a timer is set to wait for an idle channel. If an idle channel exists before the timer expires, the BSC successfully assigns the channel. If no idle channels exist when the timer expires and directed retry is not supported, the BSC measures the counter. If the directed retry fails, the BSC measures the counter and sends the MSC an ASSIGNMENT FAILURE message to clear the connection when any of the following situations occurs: o The MRs reported by the MS have no target cell available. o Directed retry to another cell in the BSC. The source cell receives the Intercell Handover Reject message from the target cell. The measurement object is the source cell. o Directed retry to another cell in the BSC. The handover fails and the MS reconnects to the original signaling channel. The measurement object is the source cell. o Directed retry to another cell in the BSC. The target cell response is not received within the scheduled time. The measurement object is the source cell. o Directed retry to another cell in the BSC. The source cell receives the Inter Clear Request message from the target cell. This clear message is used to inform the
  22. 22. source cell of the directed retry failure and to request the source cell to clear the connection. The measurement object is the source cell. o Directed retry to another cell in the BSC. The source cell sends the MS a HANDOVER COMMAND message, requesting the MS to access a new channel. If the source cell does not receive the Inter Clear Request from the target cell within the scheduled time, the BSC measures the counter. Figure 1 Assignment procedure Formula Failed TCH Seizures due to Busy TCH (Traffic Channel) = Failed Assignments (Channel Unavailable) 16. K3013A:CELL_KPI_TCH_ASS_SUCC_TRA F (Successful TCH Seizures (Traffic Channel))
  23. 23. Description This measurement provides the number of successful TCH (traffic channel) seizures by the MS in assignment procedure. Unit Integer number. Measurement Point If the assignment procedure is successful, the BSC sends the ASSIGNMENT COMPLETE message to the MSC and measures the counter. See measurement point B in Figure 1. Figure 1 Assignment procedure Formula Successful TCH Seizures (Traffic Channel) = [TCH Seizure Requests (Traffic Channel)] - ([Failed Assignments during MOC on the A Interface (Including Directed Retry)] + [Failed Assignments during MTC on the A Interface (Including Directed Retry)] + [Failed Assignments during Emergency Call on the A Interface (Including Directed Retry)] + [Failed Assignments during Call Re-establishment on the A Interface (Including Directed Retry)] + [Failed Mode Modify Attempts (MOC) (TCHF)] + [Failed Mode Modify Attempts (MTC) (TCHF)] + [Failed Mode Modify Attempts (Emergency Call) (TCHF)] + [Failed Mode Modify Attempts (Call Re-establishment) (TCHF)] + [Failed Mode Modify Attempts (MOC) (TCHH)] + [Failed Mode Modify Attempts (MTC) (TCHH)] + [Failed Mode Modify Attempts (Call Re-establishment) (TCHH)])
  24. 24. 17. K3012A:CELL_KPI_TCH_STATIC_DROPS _TRAF (Call Drops on TCH in Stable State (Traffic Channel)) Description This measurement provides the number of call drops occurred after the MS is in the stable communication state on the TCH carrying traffic. Unit Integer number. Measurement Point This counter is calculated by using the following formula. Formula Call Drops on TCH in Stable State (Traffic Channel) = [Call Drops on Radio Interface in Stable State (Traffic Channel)]+ [Call Drops due to No MRs from MS for a Long Time (Traffic Channel)]+ [Call Drops due to Abis Terrestrial Link Failure (Traffic Channel)]+ [Call Drops due to Equipment Failure (Traffic Channel)]+ [Call Drops due to Forced Handover (Traffic Channel)]+ [Call Drops Due to Loopback Start Failure]+ [Call Drops Due to Failures to Return to Normal Call from Loopback] 18. K3010B:CELL_KPI_TCH_HO_REQ_TRAF (TCH Seizure Requests in TCH Handovers (Traffic Channel)) Description In an intra-BSC incoming handover procedure, the MS requests the BSS to reallocate a TCH (traffic channel). In an inter-BSC incoming handover procedure, the MSC requests the BSS to reallocate a TCH (traffic channel). This measurement provides the total number of TCH seizure requests in the procedures mentioned previously. Unit Integer number. Measurement Point (1) Incoming internal inter-cell handover procedure: According to the measurement report received from the MS, the BSC decides to initiate the incoming internal inter-cell handover.
  25. 25. When receiving the incoming internal inter-cell handover request, the BSC measures the counter. The measurement object is the target cell. See measurement point D in Figure 1and Figure 2. Figure 1 Internal inter-cell handover procedure (excluding directed retry)
  26. 26. Figure 2 Internal inter-cell handover procedure (directed retry) (2) In the incoming external inter-cell handover procedure, when receiving the HO REQ message from the MSC, BSC2 measures this counter. The measurement object is the target cell. See measurement point D in Figure 3and Figure 4.
  27. 27. Figure 3 External handover procedure (excluding directed retry)
  28. 28. Figure 4 External handover procedure (directed retry) Formula TCH Seizure Requests in TCH Handovers (Traffic Channel) = [Internal Intra-Cell Handover Requests (TCH)] + [Incoming Internal Inter-Cell Handover Requests (TCH) (900/850-900/850)] + [Incoming Internal Inter-Cell Handover Requests (TCH) (1800/1900-1800/1900)] + [Incoming Internal Inter-Cell Handover Requests (TCH) (900/850-1800/1900)] + [Incoming Internal Inter-Cell Handover Requests (TCH) (1800/1900-900/850)] + [Incoming External Inter-Cell Handover Requests (TCH) (900/850-900/850)] + [Incoming External Inter-Cell Handover Requests (TCH) (1800/1900-1800/1900)] + [Incoming External Inter-Cell Handover Requests (TCH) (900/850-1800/1900)] +
  29. 29. [Incoming External Inter-Cell Handover Requests (TCH) (1800/1900-900/850)] 19. K3011B:CELL_KPI_TCH_HO_CONGEST_ TRAF (Failed TCH Seizures in TCH Handovers due to Busy TCH (Traffic Channel)) Description This counter provides the number of failed TCH (traffic channel) seizures due to no TCH available in TCH handovers. Unit Integer number Measurement Point According to the measurement report received from the MS, the BSC decides to initiate the incoming internal inter-cell handover. If the channel request fails because of no channel available, the BSC measures the counter. The measurement object is the target cell. See measurement point C in Figure 1 and Figure 2. Figure 1 Internal inter-cell handover procedure (excluding directed retry)
  30. 30. Figure 2 Internal inter-cell handover procedure (including directed retry) BSC2 receives the HO REQ message from the MSC and decodes it. If the decoding is successful, BSC2 requests a channel from the target cell. If the request fails because no channel is available, the measurement is triggered according to the channle type. See measurement point C in Figure 3 and Figure 4.
  31. 31. Figure 3 External handover procedure (excluding directed retry)
  32. 32. Figure 4 External handover procedure (including directed retry) Formula Failed TCH Seizures in TCH Handovers due to Busy TCH (Traffic Channel) = [Failed Internal Intra-Cell Handovers (Channel Unavailable) (TCH)+ [Failed Incoming Internal Inter-Cell Handovers (No Channel Available) (TCH)+ [Failed Incoming External Inter-Cell Handovers (No Channel Available) (TCH)
  33. 33. 20. K3013B:CELL_KPI_TCH_HO_SUCC_TRA F (Successful TCH Seizures in TCH Handovers (Traffic Channel)) Description This measurement provides the number of successful TCH (traffic channel) seizures by the MS during TCH handovers. Unit Integer number. Measurement Point Internal intra-cell handover The measurement is triggered when the BSC receives the HO DETECT message from the target BTS (see measurement point E in Figure 1and Figure 2). The measurement is based on the channel type. Figure 1 External handover procedure (excluding directed retry)
  34. 34. Figure 2 External handover procedure (directed retry) Incoming external inter-cell handover The measurement is triggered when BSC2 receives the HO DETECT message from the target BTS (see measurement point E in Figure 3and Figure 4. The measurement is based on the channel type.
  35. 35. Figure 3 Internal inter-cell handover procedure (excluding directed retry)
  36. 36. Figure 4 Internal inter-cell handover procedure (directed retry) Formula Successful TCH Seizures in TCH Handovers (Traffic Channel) = [Internal Intra-Cell Handover Detection Messages Received by BSC (TCHF)] + [Internal Intra-Cell Handover Detection Messages Received by BSC (TCHH)] + [Incoming Internal Inter-Cell Handover Detection Messages Received by BSC (TCHF)] + [Incoming Internal Inter-Cell Handover Detection Messages Received by BSC (TCHH)] + [Incoming External Inter-Cell Handover Detection Messages Received by BSC (TCHF)] + [Incoming External Inter-Cell Handover Detection Messages Received by BSC (TCHH)]
  37. 37. 21. K3012B:CELL_KPI_TCH_HO_DROPS_TR AF (Call Drops in TCH Handovers (Traffic Channel)) Description This measurement provides the number of call drops due to the Um interface failure during the handovers on the TCH carrying traffic. Unit Integer number. Measurement Point Refer to Call Drops on Radio Interface in Handover State (TCH). Formula Call Drops in TCH Handovers (Traffic Channel) =[Call Drops on Radio Interface in Handover State (Traffic Channel)] 22. K3014: CELL_KPI_TCH_TRAF_ERL_TRAF (Traffic Volume on TCH) Description This measurement provides the traffic intensity on the TCH. After activating the TCHs, the BSC calculates the average number of busy TCHs at each sampling point in a granularity period. The sampling period is 5s. NOTE: In normal cases, one-day traffic volume is the total of twenty-four 60-minute traffic volume and is not 24-hour traffic volume measured on the M2000. According to the traffic measurement on the M2000, 24-hour traffic volume is the same as 60- minute traffic volume in the case of average traffic volume. Unit Erl Measurement Point For details, see Measurement Point in Traffic Volume of TCHs. Formula Traffic Volume on TCH = [Traffic Volume of TCHs]
  38. 38. 23. K3015: CELL_KPI_TCH_AVAIL_NUM (Available TCHs) Description This measurement provides the number of available TCHs in a cell in the BSC, that is, the BSC calculates the average number of idle TCHs or busy TCHs at each sampling point in a granularity period. The sampling period is 5s. The TCHs include the TCHs that are converted from dynamic PDCHs but exclude the TCHs that are dynamically converted to SDCCHs. Unit Integer number. Measurement Point For details, see Measurement Point in Mean Number of Available Channels (TCH). Formula Available TCHs = [Mean Number of Available Channels (TCH)] 24. K3016: CELL_KPI_TCH_CFG_NUM (Configured TCHs) Description This measurement provides the number of TCHs configured in a cell in the BSC, that is, the BSC calculates the average number of TCHs configured in a cell at each sampling point in a granularity period. The sampling period is 5s. The TCHs include the TCHs that are converted from dynamic PDCHs but exclude the TCHs that are dynamically converted to SDCCHs. Unit Integer number. Measurement Point For details, see Measurement Point in Mean Number of Dynamically Configured Channels (TCH). Formula Configured TCHs = [Mean Number of Dynamically Configured Channels (TCH)]
  39. 39. 25. K3170:CELL_KPI_DUBAND_HO_REQ (Dual-Band Handover Requests) Description This measurement provides the total number of requests for the handovers between cells over different frequency bands, including the incoming internal inter-cell handovers, outgoing internal inter-cell handovers, incoming external inter-cell handovers, and the outgoing external inter-cell handovers. Unit Integer number. Measurement Point Refer to the following counters. Formula Dual-Band Handover Requests = [Incoming Internal Inter-Cell Handover Requests (SDCCH) (900/850-1800/1900)] + [Incoming Internal Inter-Cell Handover Requests (TCH) (900/850-1800/1900)] + [Incoming External Inter-Cell Handover Requests (SDCCH) (900/850-1800/1900)] + [Incoming External Inter-Cell Handover Requests (TCH) (900/850-1800/1900)] + [Outgoing External Inter-Cell Handover Requests (SDCCH) (Excluding Directed Retry) (900/850-1800/1900)] + [Outgoing External Inter-Cell Handover Requests (TCHF) (Excluding Directed Retry) (900/850- 1800/1900)] + [Outgoing External Inter-Cell Handover Requests (TCHH) (Excluding Directed Retry) (900/850- 1800/1900)] + [Outgoing External Inter-Cell Handover Requests (Directed Retry) (900/850-1800/1900)] + [Incoming Internal Inter-Cell Handover Requests (SDCCH) (1800/1900-900/850)] + [Incoming Internal Inter-Cell Handover Requests (TCH) (1800/1900-900/850)] + [Incoming External Inter-Cell Handover Requests (SDCCH) (1800/1900-900/850)] + [Incoming External Inter-Cell Handover Requests (TCH) (1800/1900-900/850)] + [Outgoing External Inter-Cell Handover Requests (SDCCH) (Excluding Directed Retry) (1800/1900-900/850)] + [Outgoing External Inter-Cell Handover Requests (TCHF) (Excluding Directed Retry) (1800/1900-900/850)] + [Outgoing External Inter-Cell Handover Requests (TCHH) (Excluding Directed Retry) (1800/1900-900/850)] + [Outgoing External Inter-Cell Handover Requests (Directed Retry) (1800/1900-900/850)] 26. K3173:CELL_KPI_DUBAND_HO_SUCC(Su ccessful Dual-Band Handovers) Description
  40. 40. This measurement provides the total number of successful handovers between cells over different frequency bands, including the incoming internal inter-cell handovers, outgoing internal inter-cell handovers, incoming external inter-cell handovers, and the outgoing external inter-cell handovers. This counter is used to evaluate the performance of the dual-band handover. Unit Integer number. Measurement Point Refer to the following counters. Formula Successful Dual-Band Handovers = [Dual-Band Handover Requests]-[Failed Dual-Band Handovers] 27. K3041: CELL_TCH_OVERFLOW_RATE (TCH Congestion Rate (Overflow)) Description This measurement provides the ratio of failed assignments due to no idle TCHs to TCH seizure requests. In the immediate assignment procedure, assignment procedure, or handover procedure, this counter is measured when the BSS successfully assigns TCHs upon the MS requests or MSC requests. Unit %. Measurement Point At the end of the granularity period, this counter is calculated by using the following formula. Formula TCH Congestion Rate(Overflow)= ([Failed TCH Seizures due to Busy TCH (Signaling Channel)]+ [Failed TCH Seizures due to Busy TCH (Traffic Channel)]+ [Failed TCH Seizures in TCH Handovers due to Busy TCH (Traffic Channel)])*{100} / ([TCH Seizure Requests (Signaling Channel)]+ [TCH Seizure Requests (Traffic Channel)]+ [TCH Seizure Requests in TCH Handovers (Traffic Channel)]) 28. K3043: CELL_TCH_SEIZ_SUCC_RATE (TCH Seizure Success Rate)
  41. 41. Description This measurement provides the ratio of successful TCH seizures to TCH seizure requests. In the immediate assignment procedure, assignment procedure, or handover procedure, this counter is measured when the BSS successfully assigns TCHs upon the MS requests or MSC requests. Unit %. Measurement Point At the end of the granularity period, this counter is calculated by using the following formula. Formula TCH Seizure Success Rate = ([Successful TCH Seizures (Signaling Channel)]+ [Successful TCH Seizures (Traffic Channel)]+ [Successful TCH Seizures in TCH handovers (Traffic Channel)])*{100} / ([TCH Seizure Requests (Signaling Channel)]+ [TCH Seizure Requests (Traffic Channel)]+ [TCH Seizure Requests in TCH Handovers (Traffic Channel)]) 29. K3034: CELL_KPI_TCHH_TRAF_ERL (TCHH Traffic Volume) Description This measurement provides the traffic volume on the TCHHs in all the cells under the control of the BSC, excluding the traffic on the TCHHs in the very early assignment. Unit Erl. Measurement Point At the end of the granularity period, this counter is calculated by using the following formula. Formula TCHH Traffic Volume = [Mean Number of Busy TCHs (TCHH) (900/850 Cell)] + [Mean Number of Busy TCHs (TCHH) (1800/1900 Cell)] 30. RK3255: CELL_TRX_CFG_AVAIL_RATE (TRX Usability) Description This measurement provides the ratio of available TRXs in a cell to TRXs configured in the cell.
  42. 42. Unit %. Measurement Point At the end of the granularity period, this counter is calculated by using the following formula. Formula TRX Usability = [Available TRXs in cell] x {100}/[Activated TRXs in cell] 31. K3040: CELL_KPI_TCH_SUCC (Successful TCH Seizures) Description In the very early assignment, assignment, directed retry, or handover procedure, this measurement provides the number of times that the MS successfully seizes the TCHs assigned by the BSS. Unit Integer number. Measurement Point At the end of the granularity period, this counter is calculated by using the following formula. Formula Successful TCH Seizures = [Successful TCH Seizures (Signaling Channel)] + [Successful TCH Seizures (Traffic Channel)] + [Successful TCH Seizures in TCH handovers (Traffic Channel)] 32. K3045:CELL_KPI_TCH_CONGESTION_R ATE (Congestion Ratio on TCH (All Channels Busy)) Description This counter provides the ratio of failed requests for idle TCHs to total requests for TCHs. Unit % Measurement Point None.
  43. 43. Formula Congestion Ratio on TCH (All Channels Busy) = ([Failed TCH Seizures due to Busy TCH (Signaling Channel)]+ [Failed TCH Seizures due to Busy TCH (Traffic Channel)]+ [Failed TCH Seizures in TCH Handovers due to Busy TCH (Traffic Channel)])x{100}/ ([TCH Seizure Requests (Signaling Channel)]+ [TCH Seizure Requests (Traffic Channel)]+ [TCH Seizure Requests in TCH Handovers (Traffic Channel)]) 33. K3173F:CELL_KPI_DUBAND_HO_FAI (Failed Dual-Band Handovers ) Description This measurement provides the total number of failed handovers between cells over different frequency bands, including the failed incoming internal inter-cell handovers, failed outgoing internal inter-cell handovers, failed incoming external inter-cell handovers, and failed outgoing external inter-cell handovers. Unit Integer number. Measurement Point This counter is measured according to the following formula. Formula Failed Dual-Band Handovers = [Failed Incoming Internal Inter-Cell Handovers (SDCCH) (900/850-1800/1900)] + [Failed Incoming Internal Inter-Cell Handovers (TCH) (900/850/-1800/1900)] + [Failed Incoming External Inter-Cell Handovers (SDCCH) (900/850-1800/1900)] + [Failed Incoming External Inter-Cell Handovers (TCH) (900/850-1800/1900)] + [Failed Outgoing External Inter-Cell Handovers (SDCCH) (Excluding Directed Retry) (900/850- 1800/1900)] + [Failed Outgoing External Inter-Cell Handovers (TCHF) (Excluding Directed Retry) (900/850- 1800/1900)] + [Failed Outgoing External Inter-Cell Handovers (TCHH) (Excluding Directed Retry) (900/850- 1800/1900)] + [Failed Outgoing External Inter-Cell Handovers (Directed Retry) (900/850-1800/1900)] + [Failed Incoming Internal Inter-Cell Handovers (SDCCH) (1800/1900-900/850)] + [Failed Incoming Internal Inter-Cell Handovers (TCH) (1800/1900-900/850)] + [Failed Incoming External Inter-Cell Handovers (SDCCH) (1800/1900-900/850)] +
  44. 44. [Failed Incoming External Inter-Cell Handovers (TCH) (1800/1900-900/850)] + [Failed Outgoing External Inter-Cell Handovers (SDCCH) (Excluding Directed Retry) (1800/1900-900/850)] + [Failed Outgoing External Inter-Cell Handovers (TCHF) (Excluding Directed Retry) (1800/1900-900/850)] + [Failed Outgoing External Inter-Cell Handovers (TCHH) (Excluding Directed Retry) (1800/1900-900/850)] + [Failed Outgoing External Inter-Cell Handovers (Directed Retry) (1800/1900-900/850)] 34. RM3276:CELL_KPI_TCH_SUCC_SIG_TCH H (Successful TCH Seizures (Signaling Channel) (TCHH)) Description This measurement provides the number of successful attempts of activating TCHHs assigned by the BSC in the very early TCH assignment procedure. Unit Integer number. Measurement Point This counter is measured according to the following formula. Formula Successful TCH Seizures (Signaling Channel) (TCHH) = [Channel Activation Attempts in Immediate Assignment Procedure (TCHH)] - ([CHAN ACTIV NACK Messages Sent by BTS in Immediate Assignment Procedure (TCHH)] + [Channel Activation Timeouts in Immediate Assignment Procedure (TCHH)]) 35. RM3176:CELL_KPI_TCH_SUCC_SIG_TCH F (Successful TCH Seizures (Signaling Channel) (TCHF)) Description This measurement provides the number of successful attempts to activate the TCHFs assigned by the BSC in the very early TCH assignment procedure. Unit Integer number.
  45. 45. Measurement Point This counter is measured according to the following formula. Formula Successful TCH Seizures (Signaling Channel) (TCHF) = [Channel Activation Attempts in Immediate Assignment Procedure (TCHF)] - ([CHAN ACTIV NACK Messages Sent by BTS in Immediate Assignment Procedure (TCHF)] + [Channel Activation Timeouts in Immediate Assignment Procedure (TCHF)]) 36. RM3278:CELL_KPI_TCH_ASS_SUCC_TR AF_TCHH (Successful TCH Seizures (Traffic Channel) (TCHH)) Description This measurement provides the number of times that the MS successfully seizes the TCHHs assigned by the BSC in the assignment procedure. Unit Integer number. Measurement Point This counter is measured according to the following formula. Formula Successful TCH Seizures (Traffic Channel) (TCHH) = [Completed Assignments (First Assignment of a TCHH)] + [Completed Assignments (Reassignment of a TCHH)] 37. RM3178:CELL_KPI_TCH_ASS_SUCC_TR AF_TCHF (Successful TCH Seizures (Traffic Channel) (TCHF)) Description This measurement provides the number of times that the MS successfully seizes the assigned traffic channels (TCHF) in the assignment procedure. Unit Integer number. Measurement Point
  46. 46. This counter is measured according to the following formula. Formula Successful TCH Seizures (Traffic Channel) (TCHF) = [Completed Assignments (First Assignment of a TCHF)] + [Completed Assignments (Reassignment of a TCHF)] 38. RM3279:CELL_KPI_TCH_HO_SUCC_TRA F_TCHH (Successful TCH Seizures in TCH Handovers (Traffic Channel) (TCHH)) Description This measurement provides the number of times that the MS successfully seizes the TCHHs assigned by the BSC during the TCH handover. Unit Integer number. Measurement Point This counter is measured according to the following formula. Formula Successful TCH Seizures in TCH Handovers (Traffic Channel) (TCHH) = [Internal Intra-Cell Handover Detection Messages Received by BSC (TCHH)] + [Incoming Internal Inter-Cell Handover Detection Messages Received by BSC (TCHH)] + [Incoming External Inter-Cell Handover Detection Messages Received by BSC (TCHH)] 39. RM3179:CELL_KPI_TCH_HO_SUCC_TRA F_TCHF (Successful TCH Seizures in TCH Handovers (Traffic Channel) (TCHF)) Description This measurement provides the number of times that the MS successfully seizes the traffic channel (TCHF) assigned by the BSC during the TCH handover. Unit Integer number. Measurement Point The value of this counter is calculated according to the following formula.
  47. 47. Formula Successful TCH Seizures in TCH Handovers (Traffic Channel) (TCHF) = [Internal Intra-Cell Handover Detection Messages Received by BSC (TCHF)] + [Incoming Internal Inter-Cell Handover Detection Messages Received by BSC (TCHF)] + [Incoming External Inter-Cell Handover Detection Messages Received by BSC (TCHF)]

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