8.3.17 Downlink Power Timeslot Control [TDD]
25.4233GPPRelease 17TSUTRAN Iur interface Radio Network Subsystem Application Part (RNSAP) signalling
8.3.17.1 General
The purpose of this procedure is to provide the DRNS with updated DL Timeslot ISCP values to use when deciding the DL TX Power for each timeslot.
This procedure shall use the signalling bearer connection for the relevant UE Context.
The Downlink Power Timeslot Control procedure can be initiated by the SRNC at any time after establishing a Radio Link. If the SRNC has initiated deletion of the last Radio Link in this DRNS, the Downlink Power Timeslot Control procedure shall not be initiated.
8.3.17.2 Successful Operation
Figure 26A: Downlink Power Timeslot Control procedure, Successful Operation
The Downlink Power Timeslot Control procedure is initiated by the SRNC sending a DL POWER TIMESLOT CONTROL REQUEST message to the DRNC.
Upon receipt of the DL POWER TIMESLOT CONTROL REQUEST message, the DRNS shall use the included [3.84Mcps TDD and 7.68 Mcps TDD – DL Timeslot ISCP Info IE] [1.28Mcps TDD – DL Timeslot ISCP Info LCR IE] value when deciding the DL TX Power for each timeslot as specified in TS 25.224 [22], i.e. it shall reduce the DL TX power in those downlink timeslots of the radio link in which the interference is low, and increase the DL TX power in those timeslots in which the interference is high, while keeping the total downlink power in the radio link unchanged.
If the Primary CCPCH RSCP Delta IE is included, the DRNS shall assume that the reported value for Primary CCPCH RSCP is in the negative range as per TS 25.123 [24], and the value is equal to the Primary CCPCH RSCP Delta IE. If the Primary CCPCH RSCP Delta IE is not included and the Primary CCPCH RSCP IE is included, the DRNS shall assume that the reported value is in the non-negative range as per TS 25.123 [24], and the value is equal to the Primary CCPCH RSCP IE. The DRNS should use the indicated value for HS-DSCH scheduling and transmit power adjustment.
8.3.17.3 Abnormal Conditions
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