Signalling Charts Nokia

7/29/2019 Signalling Charts Nokia

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Signalling charts of Traffic Measurement

The following figures show the signalling charts of Traffic Measurement:

Figure: Basic call without counters


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Figure: Basic call with counters


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Figure: Basic call with priority subscriber


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Figure: FACCH call setup due to SDCCH congestion without counters


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Figure: FACCH call setup due to SDCCH congestion with counters


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Figure: FACCH call setup due to SDCCH congestion, no free TCH channel. Optional softwaredirected retry is not activated


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Figure: Normal release


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Figure: Basic call, no free TCH and queuing or directed retry is not allowed


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Figure: Successful TCH queuing


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Figure: Basic call, no free TCHs, unsuccessful queuing and directed retry not activated


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Figure: TCH assignment failure with cause switch_circuit_pool, queuing and directed retry not allowed


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Figure: Unsuccessful TCH activation


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Figure: Unsuccessful TCH activation, timer expires while waiting for CHANNEL_ACTIVATION_ACKmessage


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Figure: TCH assignment failure


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Figure: TCH assignment failure, MSC sends CLEAR_COMMAND message


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Figure: CONNECTION_FAILURE message with cause transcoder_failure during a call


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Figure: TRX or TSL is blocked with different causes during a call

Figure TRX or TSL is blocked with different causes during a call: Counters updated with causeLAPD_failure: 001012 and 001046. Counters updated with cause BTS_failure: 001012 and 001047. Counter001048 is updated with cause USER_actions. Counter 001050 is updated with cause NETW_actions.

Counters updated with cause ABIS_failure: 001012, 001045 and 001084. Counter 001108, 001109, 001110,001111, 001112 or 001113 and counter 001133 or 001134 are always updated with these causes.


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Figure: SDCCH congestion, FACCH call setup is not activated


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Figure: Unsuccessful SDCCH activation

Figure: Unsuccessful SDCCH activation, timer expires while waiting forCHANNEL_ACTIVATION_ACK message


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Figure: Connection failure during SDCCH assignment


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Figure: SDCCH assignment failure


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Figure: Unsuccessful SDCCH activation, timer expires while waiting forPHYSICAL_CONTEXT_CONFIRM message


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Figure: TRX/TSL is blocked with different causes during an SDCCH channel activation

Figure TRX/TSL is blocked with different causes during an SDCCH channel activation: Counters updatedwith cause LAPD_failure: 001002 and 001035. Counters updated with cause BTS_failure: 001002 and001036. Counter 001037 is updated with cause USER_actions. Counter 001039 is updated with causeNETW_actions. Counters updated with causeABIS_failure: 001002, 001033 and 001075.


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Figure: Successful trunk reservation. Counters updated: 001040, 001041 and basic call counters, seeFigure 2.


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Figure: Unsuccessful trunk reservation


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Figure: Successful internal intra-cell handover. Counters 001090 and 001091 are updated only withunderlay overlay handover.


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Figure: Internal intra-cell HO, successful TCH queuing

Figure Internal intra-cell HO, successful TCH queuing: Counters 001090 and 001091 are updated only withunderlay overlay HO. Counters 001142, 001143 and 001144 are updated only if the HO is started by causeurgent_handover. 001145 and 001146 are updated only if the HO is started by cause non_urgent_handover.


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Figure: Unsuccessful internal intra-cell handover, timer expires while waiting forCHANNEL_ACTIVATION_ACK message


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Figure: Unsuccessful internal intra-cell handover, CONNECTION_FAILURE message with causeremote_transcoder_failure comes to the target channel


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Figure: Unsuccessful internal intra-cell handover, timer expires on the source channel, call cleared


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Figure: Unsuccessful underlay overlay internal intra-cell handover, queuing not allowed


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Figure: Internal intra-cell handover, unsuccessful TCH queuing

Figure Internal intra-cell handover, unsuccessful TCH queuing: Counters 001142, 001143, 001144 and001147 are updated only if the handover is started by cause urgent_handover. Counters 001145 and001146 are updated only if the handover is started by cause non_urgent_handover.


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Figure: Internal directed retry


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Figure: Successful internal inter-cell handover

Figure Successful internal inter-cell handover: Counters 001090 and 001091 are updated only with underlayoverlay handover.


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Figure: Unsuccessful internal inter-cell handover


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Figure: Successful external handover, target


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Figure: Successful external handover, source


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Figure: Unsuccessful external handover, source BSC, timer expires while waiting forCLEAR_COMMAND message


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Figure: Unsuccessful external handover, MS sends a handover failure


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Figure: Successful traffic reason handover, source

Figure: Successful SDCCH internal intra-cell handover


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Figure: Unsuccessful SDCCH internal intra-cell handover, timer expires while waiting forCHANNEL_ACTIVATION_ACK message


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Figure: Unsuccessful SDCCH internal intra-cell handover, unsuccessful channel activation


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Figure: Unsuccessful SDCCH internal intra-cell handover, CONNECTION_FAILURE message comesto the target channel during handover


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Figure: Successful SDCCH internal inter-cell handover


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Figure: Unsuccessful SDCCH internal inter-cell handover, BTS sends CONNECTION_FAILUREmessage

Figure: Successful SDCCH external handover target


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Figure: Successful SDCCH external handover source. No counters updating.


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Figure: Unsuccessful SDCCH external handover, timer expires while waiting for CLEAR_COMMANDmessage


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Figure: Successful forced release


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Figure: Unsuccessful forced release


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Figure: Unsuccessful forced release with external handover


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Figure: Successful forced handover


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Figure: Unsuccessful forced handover


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Figure: Unsuccessful forced handover with external handover


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Figure: Reconfiguration from TCH to SDCCH

Figure: Normal call


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Figure: Mobile originated HSCSD call setup


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Figure: Successful internal inter-cell handover for HSCSD, target cell allocations and activations forthree channels


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Figure: A CONNECTION_FAILURE message which comes during an HSCSD


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Figure: Internal intra-cell direct access from a regular DCCH to the super-reuse TRX. Optionalsoftware direct access to super-reuse TRX in IUO activated.


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Figure: Unsuccessful internal intra-cell direct access from regular DCCH to the super-reuse TRX dueto lack of resources. Optional software direct access to super-reuse TRX in IUO activated.


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Figure: Timer T3107 expires while waiting for ASSIGNMENT_COMPLETE message


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Figure: Average counter updating

Figure: Successful handover due to DADL/B


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Figure: Unsuccessful DADL/B handover due to lack of resources

Figure: Successful BSC controlled TRHO


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Figure: Unsuccessful BSC controlled TRHO


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Figure: Dropped call between ASSIGNMENT COMPLETE and DISCONNECT


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Figure: Dropped call between ASSIGNMENT COMPLETE and RF CHANNEL RELEASE ACK

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