8.3.11 Dedicated Measurement Initiation
25.4233GPPRelease 17TSUTRAN Iur interface Radio Network Subsystem Application Part (RNSAP) signalling
8.3.11.1 General
This procedure is used by an SRNS to request the initiation of dedicated measurements in a DRNS.
This procedure shall use the signalling bearer connection for the relevant UE Context.
The Dedicated Measurement Initiation procedure shall not be initiated if a Prepared Reconfiguration exists, as defined in subclause 3.1.
8.3.11.2 Successful Operation
Figure 20: Dedicated Measurement Initiation procedure, Successful Operation
The procedure is initiated with a DEDICATED MEASUREMENT INITIATION REQUEST message sent from the SRNC to the DRNC.
Upon receipt, the DRNC shall initiate the requested dedicated measurement according to the parameters given in the DEDICATED MEASUREMENT INITIATION REQUEST message.
If the Dedicated Measurement Object Type is indicated as being “RL” in the DEDICATED MEASUREMENT INITIATION REQUEST message, measurement results shall be reported for all the indicated Radio Links.
[FDD – If the Dedicated Measurement Object Type is indicated as being “RLS” in the DEDICATED MEASUREMENT INITIATION REQUEST message, measurement results shall be reported for all the indicated Radio Link Sets.]
[FDD – If the Dedicated Measurement Object Type is indicated as being “ALL RL” in the DEDICATED MEASUREMENT INITIATION REQUEST message, measurement results shall be reported for all current and future Radio Links within the UE Context.]
[TDD – If the Dedicated Measurement Object Type is indicated as being “ALL RL” in the DEDICATED MEASUREMENT INITIATION REQUEST message, measurement results shall be reported for one existing DPCH per CCTrCH in each used time slot of current and future Radio Links within the UE Context, provided the measurement type is applicable to the respective DPCH.]
[FDD – If the Dedicated Measurement Object Type is indicated as being “ALL RLS” in the DEDICATED MEASUREMENT INITIATION REQUEST message, measurement results shall be reported for all the existing and future Radio Link Sets within the UE Context.]
[TDD – If the DPCH ID IE or DPCH ID 7.68Mcps IE is provided within the RL Information, the measurement request shall apply for the requested physical channel individually. If no DPCH ID IE, DPCH ID 7.68Mcps IE or HS-SICH ID IE is provided within the RL Information the measurement request shall apply for one existing DPCH per CCTrCH in each used time slot of the Radio Link, provided the measurement type is applicable to this DPCH.]
[TDD – If the HS-SICH Information IE is provided within the RL Information, the measurement request shall apply for the requested physical channel individually.]
[TDD – If the Dedicated Measurement Type IE is set to “HS-SICH reception quality “, the DRNS shall initiate measurements of the failed, missed and total HS-SICH transmissions on all of the HS-SICH assigned to this UE Context. If either the failed or missed HS-SICH transmission satisfies the requested report characteristics, the DRNS shall report the result of both failed and missed transmission measurements along with the total number of transmissions.]
Report characteristics
The Report Characteristics IE indicates how the reporting of the dedicated measurement shall be performed. See also Annex B.
If the Report Characteristics IE is set to “On Demand” and if the CFN IE is not provided, the DRNS shall report the measurement result immediately in the DEDICATED MEASUREMENT INITIATION RESPONSE message. If the CFN IE is provided, it indicates the frame for which the measurement value shall be provided. The provided measurement value shall be the one reported by the layer 3 filter, referred to as point C in the measurement model (TS 25.302 [26]).
If the Report Characteristics IE is set to “Periodic” and if the CFN IE is not provided, the DRNS shall immediately and periodically initiate the Dedicated Measurement Reporting procedure for this measurement, with a frequency as specified by the Report Periodicity IE. If the CFN IE is provided, the DRNS shall initiate a Dedicated Measurement Reporting procedure for this measurement at the CFN indicated in the CFN IE, and shall repeat this initiation periodically thereafter with a frequency as specified by the Report Periodicity IE. The provided measurement value shall be the one reported by the layer 3 filter, referred to as point C in the measurement model (TS 25.302 [26]).
If the Report Characteristics IE is set to “Event A”, the DRNS shall initiate the Dedicated Measurement Reporting procedure when the measured entity rises above the requested threshold, as specified by the Measurement Threshold IE, and then stays above the threshold for the requested hysteresis time, as specified by the Measurement Hysteresis Time IE. If the Measurement Hysteresis Time IE is not included, the DRNC shall use the value zero for the hysteresis time.
If the Report Characteristics IE is set to “Event B”, the DRNS shall initiate the Dedicated Measurement Reporting procedure when the measured entity falls below the requested threshold, as specified by the Measurement Threshold IE, and then stays below the threshold for the requested hysteresis time, as specified by the Measurement Hysteresis Time IE. If the Measurement Hysteresis Time IE is not included, the DRNC shall use the value zero for the hysteresis time.
If the Report Characteristics IE is set to “Event C”, the DRNS shall initiate the Dedicated Measurement Reporting procedure when the measured entity rises more than the requested threshold specified by the Measurement Increase/Decrease Threshold IE, and only when this rise occurs within the requested rising time specified by the Measurement Change Time IE. After reporting this type of event, DRNS shall not initiate the next C event reporting for the same measurement during the subsequent time specified by the Measurement Change Time IE.
If the Report Characteristics IE is set to “Event D”, the DRNS shall initiate the Dedicated Measurement Reporting procedure when the measured entity falls more than the requested threshold specified by the Measurement Increase/Decrease Threshold IE, and only when this falls occurs within the requested falling time specified by the Measurement Change Time IE. After reporting this type of event, the DRNS shall not initiate the next D event reporting for the same measurement during the subsequent time specified by the Measurement Change Time IE.
If the Report Characteristics IE is set to “Event E”, the DRNS shall initiate the Dedicated Measurement Reporting procedure when the measured entity rises above the Measurement Threshold 1 IE and stays above the threshold for the Measurement Hysteresis Time IE (Report A). When the conditions for Report A are met and if the Report Periodicity IE is provided, the DRNS shall initiate the Dedicated Measurement Reporting procedure periodically with the requested report frequency specified by the Report Periodicity IE. If the conditions for Report A have been met and the measured entity falls below the Measurement Threshold 2 IE and stays below the threshold for the Measurement Hysteresis Time IE, the DRNS shall initiate the Dedicated Measurement Reporting procedure (Report B) and shall terminate any corresponding periodic reporting. If the Measurement Threshold 2 IE is not present, the DRNS shall use the value of the Measurement Threshold 1 IE instead. If the Measurement Hysteresis Time IE is not included, the DRNC shall use the value zero as hysteresis times for both Report A and Report B.
If the Report Characteristics IE is set to “Event F”, the DRNS shall initiate the Dedicated Measurement Reporting procedure when the measured entity falls below the Measurement Threshold 1 IE and stays below the threshold for the Measurement Hysteresis Time IE (Report A). When the conditions for Report A are met and if the Report Periodicity IE is provided, the DRNS shall initiate the Dedicated Measurement Reporting procedure periodically with the requested report frequency specified by the Report Periodicity IE. If the conditions for Report A have been met and the measured entity rises above the Measurement Threshold 2 IE and stays above the threshold for the Measurement Hysteresis Time IE, the DRNS shall initiate the Dedicated Measurement Reporting procedure (Report B) and shall terminate any corresponding periodic reporting. If the Measurement Threshold 2 IE is not present, the DRNS shall use the value of the Measurement Threshold 1 IE instead. If the Measurement Hysteresis Time IE is not included, the DRNC shall use the value zero as hysteresis times for both Report A and Report B.
If the Report Characteristics IE is not set to “On –Demand”, the DRNS is required to perform reporting for a dedicated measurement object, in accordance with the conditions provided in the DEDICATED MEASUREMENT INITIATION REQUEST message, as long as the object exists. If no dedicated measurement object(s) for which a measurement is defined exists any more, the DRNS shall terminate the measurement locally without reporting this to the SRNC.
If at the start of the measurement, the reporting criteria are fulfilled for any of Event A, Event B, Event E or Event F, the DRNS shall initiate the Dedicated Measurement Reporting procedure immediately, and then continue with the measurements as specified in the DEDICATED MEASUREMENT INITIATION REQUEST message.
Higher layer filtering
The Measurement Filter Coefficient IE indicates how filtering of the dedicated measurement values shall be performed before measurement event evaluation and reporting.
The averaging shall be performed according to the following formula.
The variables in the formula are defined as follows:
Fn is the updated filtered measurement result.
Fn-1 is the old filtered measurement result.
Mn is the latest received measurement result from physical layer measurements, the unit used for Mn is the same unit as the reported unit in the DEDICATED MEASUREMENT INITIATION RESPONSE, DEDICATED MEASUREMENT REPORT messages or the unit used in the event evaluation (i.e. same unit as for Fn).
A = ½(k/2) , where k is the parameter received in the Measurement Filter Coefficient IE. If the Measurement Filter Coefficient IE is not present, a shall be set to 1 (no filtering)
In order to initialise the averaging filter, F0 is set to M1 when the first measurement result from the physical layer measurement is received.
Measurement Recovery Behavior:
If the Measurement Recovery Behavior IE is included in the DEDICATED MEASUREMENT INITIATION REQUEST message, the DRNS shall, if Measurement Recovery Behavior is supported, include the Measurement Recovery Support Indicator IE in the DEDICATED MEASUREMENT INITIATION RESPONSE message and perform the Measurement Recovery Behavior as described in subclause 8.3.12.2.
Response message
If the DRNS was able to initiate the measurement requested by the SRNS it shall respond with the DEDICATED MEASUREMENT INITIATION RESPONSE message. The message shall include the same Measurement ID that was used in the DEDICATED MEASUREMENT INITIATION REQUEST message.
In the case in which the Report Characteristics IE is set to “On Demand”:
– The DRNC shall include the measurement result in the Dedicated Measurement Value IE within the DEDICATED MEASUREMENT INITIATION RESPONSE message.
– If the CFN Reporting Indicator IE is set to “FN Reporting Required”, the CFN IE shall be included in the DEDICATED MEASUREMENT INITIATION RESPONSE message. The reported CFN shall be the CFN at the time when the dedicated measurement value was reported by the layer 3 filter, referred to as point C in the measurement model (TS 25.302 [26]).
– [TDD – If the measurement was made on a particular DPCH, the DEDICATED MEASUREMENT INITIATION RESPONSE message shall include the DPCH ID of that DPCH in the [1.28Mcps TDD and 3.84Mcps TDD – DPCH ID IE] [7.68Mcps TDD – DPCH ID 7.68Mcps IE].]
– [TDD – If the measurement was made on a particular HS-SICH, the DEDICATED MEASUREMENT INITIATION RESPONSE message shall include the ID of that HS-SICH in the HS-SICH ID IE.]
[FDD – If the Alternative Format Reporting Indicator IE is set to “Alternative format is allowed” in the DEDICATED MEASUREMENT INITIATION REQUEST message, the DRNC may include the Extended Round Trip Time IE in the DEDICATED MEASUREMENT INITIATION RESPONSE message.]
8.3.11.3 Unsuccessful Operation
Figure 21: Dedicated Measurement Initiation procedure, Unsuccessful Operation
If the requested measurement cannot be initiated for one of the RL/RLS, the DRNC shall send a DEDICATED MEASUREMENT INITIATION FAILURE message. The message shall include the same Measurement ID IE that was used in the DEDICATED MEASUREMENT INITIATION REQUEST message and shall include the Cause IE set to an appropriate value.
If the DEDICATED MEASUREMENT INITIATION REQUEST message includes the Partial Reporting Indicator IE, the DRNS shall, if partial reporting is supported, separate the unsuccessful measurement initiations from the successful measurement initiations. For the successful measurement initiations on a RL or an RLS, the DRNS shall include the Successful RL Information IE or the Successful RL Set Information IE for the concerned RL or RLS if the Report Characteristics IE in the DEDICATED MEASUREMENT INITIATION REQUEST message was set to “On Demand”. For the unsuccessful measurement initiations, the DRNS shall include the Individual Cause IE set to an appropriate value if it differs from the value of the Cause IE.
Typical cause values are:
Radio Network Layer Causes:
Measurement not Supported For The Object;
Measurement Temporarily not Available.
Miscellaneous Causes:
Control Processing Overload;
HW Failure.
8.3.11.4 Abnormal Conditions
The allowed combinations of the Dedicated Measurement Type and Report Characteristics Type are shown in the table below marked with “X”. For not allowed combinations, the DRNS shall reject the Dedicated Measurement Initiation procedure using the DEDICATED MEASUREMENT INITIATION FAILURE message.
Table 4: Allowed Dedicated Measurement Type and Report Characteristics Type combinations
|
Dedicated Measurement Type |
Report Characteristics Type |
||||||||
|
On Demand |
Periodic |
Event A |
Event B |
Event C |
Event D |
Event E |
Event F |
On Modification |
|
|
SIR |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
SIR Error |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
Transmitted Code Power |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
RSCP |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
Rx Timing Deviation |
X |
X |
X |
X |
X |
X |
|||
|
Round Trip Time |
X |
X |
X |
X |
X |
X |
X |
X |
|
|
Rx Timing Deviation LCR |
X |
X |
X |
X |
X |
X |
|||
|
HS-SICH Reception Quality |
X |
X |
X |
X |
X |
X |
|||
|
Angle Of Arrival LCR |
X |
X |
|||||||
|
Rx Timing Deviation 7.68Mcps |
X |
X |
X |
X |
X |
X |
|||
|
Rx Timing Deviation 3.84Mcps Extended |
X |
X |
X |
X |
X |
X |
|||
|
UE transmission power headroom |
X |
X |
X |
X |
|||||
|
DL transport block size |
X |
X |
|||||||
If the Dedicated Measurement Type received in the Dedicated Measurement Type IE is not defined in TS 25.215 [11] or TS 25.225 [14] to be measured on the Dedicated Measurement Object Type received in the DEDICATED MEASUREMENT INITIATION REQUEST message, the DRNS shall reject the Dedicated Measurement Initiation procedure.
If the CFN IE is included in the DEDICATED MEASUREMENT INITIATION REQUEST message and the Report Characteristics IE is other than “Periodic” or “On Demand”, the DRNS shall reject the Dedicated Measurement Initiation procedure, and the DRNC shall send a DEDICATED MEASUREMENT INITIATION FAILURE message.