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4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.1 General | The received signal level may be employed as a criterion in the RF power control and handover processes. For cells of other radio access technology, RXLEV is replaced by the relevant measurement quantity for that radio access technology (see clause 8.1.5). |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.2 Physical parameter | The R.M.S received signal level at the receiver input shall be measured by the MS and the BSS over the full range of -110 dBm to -48 dBm with an absolute accuracy of ±4 dB from -110 dBm to -70 dBm under normal conditions and ±6 dB over the full range under both normal and extreme conditions. The R.M.S received signal l... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.3 Statistical parameters | For each channel, the measured parameters (RXLEV) shall be the average of the received signal level measurement samples in dBm taken on that channel within the reporting period of length one SACCH multiframe defined in 8.4. In averaging, measurements made during previous reporting periods shall always be discarded. Whe... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.4 Range of parameter | The measured signal level shall be mapped to an RXLEV value between 0 and 63, as follows: RXLEV 0 = less than -110 dBm + SCALE. RXLEV 1 = -110 dBm + SCALE to -109 dBm + SCALE. RXLEV 2 = -109 dBm + SCALE to -108 dBm + SCALE. : : RXLEV 62 = -49 dBm + SCALE to -48 dBm + SCALE. RXLEV 63 = greater than -48 dBm + SCALE. wher... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.5 Measurement quantity for other radio access technologies | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.5.1 UTRAN FDD | For UTRAN FDD cells, the measurement quantities to be used are CPICH Ec/No and CPICH RSCP and RSSI. The measurement requirements are defined in TS 25.133. RSCP shall be used for the cell re-selection ranking criteria. Ec/No shall be used for a minimum quality requirement. Either RSCP or Ec/No shall be used for measurem... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.5.2 UTRAN TDD | For UTRAN TDD cells, the measurement quantity to be used is PCCPCH RSCP. The measurement requirements are defined in TS 25.123. The measured value Qmeas shall replace RXLEV in the measurement reports. The mapping is defined in TS 25.225. For RSCP, values above 63 shall be reported as 63. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.1.5.3 cdma2000 | For cdma2000 cells, the measurement quantity to be used is PILOT_STRENGTH of the pilot. The measurement requirements are defined in TIA/EIA/IS-2000-5-A. ETSI ETSI TS 100 911 V8.5.0 (2000-10) 30 (GSM 05.08 version 8.5.0 Release 1999) The measured value Qmeas shall replace RXLEV in the measurement reports. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.2 Signal quality | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.2.1 General | The received signal quality shall be employed as a criterion in the RF power control and handover processes. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.2.2 Physical parameter | The received signal quality shall be measured by the MS and BSS in a manner that can be related to an equivalent average BER before channel decoding (i.e. chip error ratio), assessed over the reporting period of 1 SACCH block. For FPC, the received signal quality for each E-TCH shall be measured by the MS and BSS in a ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.2.3 Statistical parameters | For each channel, the measured parameters (RXQUAL) shall be the received signal quality, averaged on that channel over the reporting period of length one SACCH multiframe defined in clause 8.4. In averaging, measurements made during previous reporting periods shall always be discarded. Contrary to RXLEV measurements, i... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.2.4 Range of parameter | When the quality is assessed over the full-set and sub-set of frames defined in clause 8.4, eight levels of RXQUAL are defined and shall be mapped to the equivalent BER before channel decoding as follows: RXQUAL_0 BER < 0,2 % Assumed value =0,14 % RXQUAL_1 0,2 % < BER < 0,4 % Assumed value =0,28 % RXQUAL_2 0,4 % < BER ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.2.4.1 Range of parameters for EGPRS | The mapping tables for the mean channel quality for 8-PSK and GMSK respectively, are defined as follows: Mean Channel Quality for 8PSK MEAN_BEP 0 log10(mean(BEP)) > -0.6 MEAN_BEP 1 -0.6 > log10(mean(BEP)) > -0.64 MEAN_BEP 2 -0.64 > log10(mean(BEP)) > -0.68 MEAN_BEP 3 -0.68 > log10(mean(BEP)) > -0.72 MEAN_BEP 4 -0.72 > ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.3 Aspects of discontinuous transmission (DTX) | When DTX is employed on a TCH, not all TDMA frames may be transmitted. However, the following subset shall always be transmitted, except for TCH/AFS and TCH/AHS, and hence can be employed to assess quality and signal level during DTX. Type of channel TDMA frame subset always to be transmitted TDMA frame number (FN) mod... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4 Measurement reporting | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.1 Measurement reporting for the MS on a TCH | For a TCH, the reporting period of length 104 TDMA frames (480 ms) is defined in terms of TDMA frame numbers (FN) as follows: Timeslot number (TN) TDMA frame number (FN) modulo 104 TCH/F TCH/H,subch.0 TCH/H,subch.1 Reporting period SACCH Message block 0 0 and 1 0 to 103 12, 38, 64, 90 1 0 and 1 13 to 12 25, 51, 77, 103... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.1.1 Measurement reporting for the MS on an E-TCH in FPC mode | For an E-TCH, the FPC reporting period of length 4 TDMA frames (20 ms) is defined according to clause 4.7, When on an E-TCH, the MS shall, in addition to what is specified in clause 8.4.1, assess during the FPC reporting period and transmit to the BSS in the next scheduled FPC inband message (see clause 4.7) the follow... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.2 Measurement reporting for the MS on a SDCCH | For a SDCCH, the reporting period of length 102 TDMA frames (470.8 ms) is defined in terms of TDMA frame numbers (FN) as follows: TDMA frame number (FN) modulo 102 SDCCH/8 12 to 11 SDCCH/4 37 to 36 NOTE 1: Some SDCCH data or TCH speech, data or SID message blocks are spread over two reporting periods. In these cases, t... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.3 Additional cell reporting requirements for multi band MS | For a multi band MS the number of cells, for each frequency band supported, which shall be included in the measurement report is indicated by the parameter MULTIBAND_REPORTING, broadcast on BCCH and PBCCH. An MS attached to GPRS shall use the parameter broadcast on PBCCH if it exists. In all other cases, the MS shall u... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.4 Common aspects for the MS on a TCH or a SDCCH | Whether the MS is on a TCH or a SDCCH, if the next SACCH message block is used for a different Layer 3 message, the averaged data which would otherwise be sent in that block is discarded and a new average started for the current block. I.e., any SACCH message will report the average data for the previous reporting peri... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.5 Measurement reporting for the BSS | Unless otherwise specified by the operator, the BSS shall make the same RXLEV (full and sub) and RXQUAL (full and sub) assessments as described for the MS for all TCH's and SDCCH's assigned to an MS, using the associated reporting periods. These values, together with the reported values from the MS, shall be transmitte... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.6 Extended measurement reporting | When on a TCH or SDCCH, the mobile station may receive an Extended Measurement Order (EMO) message. The mobile station shall then, during one reporting period, perform received signal level measurements according to the frequency list contained in the EMO message. BSIC decoding is not required for these frequencies. Th... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.7 Additional cell reporting requirements for multi-RAT MS | A multi-RAT MS shall report the number of best valid cells, in each supported other radio access technology/mode in the neighbour cell list, according to the value of the parameters XXX_MULTIRAT_REPORTING (XXX indicates radio access technology/mode). The remaining positions in the measurement report shall be used for r... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.8.1 Reporting Priority | The MS shall include the neighbour cell measurement results using the following priority order: 1) the number of strongest GSM cells with known and valid BSIC and with a reported value equal or greater than XXX_REPORTING_THRESHOLD, in the frequency band of the serving cell, according to the value of the parameter SERVI... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.4.8.2 Measurement Reporting | The reporting period shall be as specified in 8.4.1 for the MS on a TCH and as specified in 8.4.2 for the MS on a SDCCH. When on a TCH, the MS shall assess during the reporting period and transmit to the BSS in the next SACCH message block the following: - RXLEV for neighbour cells in the order defined in 8.4.8.1. For ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.5 Absolute MS-BTS distance | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.5.1 General | The Absolute MS-BTS distance may be employed by the network as a criterion in the handover processes. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 8.5.2 Physical parameter | The information being used by the BSS to perform "adaptive frame alignment" (GSM 05.10) in the MS is a representation of the absolute distance of the MS to the serving BTS. This absolute distance may be used by the BSS to prevent MS from grossly exceeding the planned cell boundaries. The allowable distance is administe... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 9 Control parameters | The parameters employed to control the radio links are shown in tables 1 and 2. Table 1: Radio sub-system link control parameters Parameter name Description Range Bits Channel BSIC Base station Identification Code 0-63 6 SCH D/L BA BCCH Allocation - - BCCH D/L BA_IND Sequence number of BA 0/1 1 BCCH D/L MS_TXPWR_MAX_CC... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10 GPRS mode tasks | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1 Cell Re-selection | In GPRS Standby and Ready states, cell re-selection is performed by the MS, except for a class A MS (see GSM 02.06) while in dedicated mode of a circuit switched connection, in which case the cell is determined by the network according to the handover procedures (see clause 3). When the circuit switched connection is r... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.1 Monitoring the received signal level and PBCCH data | The MS shall measure the received RF signal level on the BCCH carriers of the serving cell and the surrounding cells as indicated in the BA(GPRS) list and optionally the NC_FREQUENCY_LIST, and calculate the received level average (RLA_P) for each carrier. In addition the MS shall verify the BSIC of the BCCH carriers. O... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.1.1 Packet idle mode | Whilst in packet idle mode (see 03.64) an MS shall continuously monitor all BCCH carriers as indicated by the BA(GPRS) list and the BCCH carrier of the serving cell. At least one received signal level measurement sample on each BCCH carrier shall be taken for each paging block monitored by the MS according to its curre... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.1.2 Packet transfer mode | Whilst in packet transfer mode an MS shall continuously monitor all BCCH carriers as indicated by the BA(GPRS) list and the BCCH carrier of the serving cell. In every TDMA frame, a received signal level measurement sample shall be taken on at least one of the BCCH carriers, one after the another. Optionally, measuremen... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.2 Cell Re-selection Criteria | The following cell re-selection criteria are used for GPRS, whereby (s) denotes the serving cell, and (ni) denotes the neighbour cells. Different parameter values may apply for each neighbour cell. One set of parameters is broadcast in each cell. 1) The path loss criterion parameter C1 is used as a minimum signal level... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.3 Cell Re-selection Algorithm | At least for every new sample or every second, whichever is the greatest, the MS shall update RLA_P and calculate the value of C1, C31 and C32 for the serving cell and the non-serving cells. The MS shall make a cell re-selection if: i) The path loss criterion parameter (C1) for the serving cell falls below zero. ii) A ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.3.1 Abnormal cell reselection | In the event of an abnormal release with cell reselection (see GSM 04.60) when PBCCH exists, an abnormal cell reselection based on BA(GPRS) shall be attempted. The MS shall perform the following algorithm to determine which cell to be used for this cell reselection attempt. If access to another cell is not allowed, i.e... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.3.1a Algorithm for cell re-selection from GSM to UTRAN | If the broadcast neighbour cell list includes UTRAN cells, the MS shall, at least every 5 second update RLA_P for the serving cell and each of the at least 6 strongest non serving GSM cells and evaluate the S citerion for the UTRAN cells. The MS shall then reselect a suitable UTRAN cell if it fulfils the S criterion an... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.4 Network controlled Cell re-selection | The network may request measurement reports from the MS and control its cell re-selection. This is indicated by the parameter NETWORK_CONTROL_ORDER. The meaning of the different parameter values is specified as follows: NC0 Normal MS control The MS shall perform autonomous cell re-selection. NC1 MS control with measure... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.4.1 Measurement reporting | When ordered to send measurement reports, the MS shall continuously monitor all carriers in BA(GPRS) or as indicated by the parameter NC_FREQUENCY_LIST and the BCCH carrier of the serving cell. Received signal level measurement samples shall be taken as often as defined in clause 10.1.1. for the actual packet mode. For... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.4.2 Cell re-selection command | A cell re-selection command may be sent from the network to an MS. When the MS receives the command, it shall re- select the cell according to the included cell description and change the network control mode according to the command (see GSM 04. 60). The command may include re-selection of another radio access technol... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.4.3 Exceptional cases | An MS in network control mode NC1 or NC2 may enter any of the following exceptional cases: - a circuit switched connection is established, which takes precedence over GPRS cell re-selection; - an anonymous access is performed. In such a case the MS is not required to send measurement reports according to clause 10.1.4.... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.1.5 Extended Measurement reporting | The network may request measurement reports from the MS for other purposes than cell re-selection. This is indicated by the parameter EXT_MEASUREMENT_ORDER. The meaning of the different parameter values is specified as follows: EM0 The MS shall not perform extended measurements. EM1 The MS shall send extended measureme... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2 RF Power Control | Sub-clauses 10.2.1 and 10.2.2 do not apply to a MS in dual transfer mode that only supports the Exclusive MAC mode while in DTM. In this case: - The MS shall apply the output power ordered by the network on the SACCH to all channels. - The network shall use the same output power on the dedicated connection and on all t... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.1 MS output power | The RF output power, PCH, to be employed by the MS on each individual uplink PDCH shall be: PCH = min(Γ0 - ΓCH - α * (C + 48), PMAX), (1) where ΓCH is an MS and channel specific power control parameter, sent to the MS in an RLC control message (see GSM 04.60). Γ0 = 39 dBm for GSM 400, GSM900, GSM850 = 36 dBm for DCS1 8... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.2 BTS output power | Downlink power control can only be used when the serving BCCH or CPBCCH and the used PDCH frequencies are in the same frequency band. On the PDCHs that contain PBCCH or PCCCH, the BTS shall use constant output power, which may be lower than the output power used on BCCH. The power reduction (Pb) used on PCCCH, relative... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3 Measurements at MS side | A procedure shall be implemented in the MS to monitor periodically the downlink Rx signal level and quality from its serving cell. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.1 Deriving the C value | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.1.1 Packet idle mode | In packet idle mode, the MS shall periodically measure the received signal level of the PCCCH or, if PCCCH is not existing, the BCCH or, for COMPACT, the CPCCCH or CPBCCH, CFCCH, and CSCH. The MS shall measure the received signal level of each paging block monitored by the MS according to its current DRX mode and its p... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.1.2 Packet transfer mode | In packet transfer mode, the MS shall use the same received signal level measurements as made for cell reselection on the BCCH carrier of the serving cell (see 10.1.1.2) or, for COMPACT, on the CPBCCH carrier of the serving cell (see 12.4.1.2). The measurements shall be filtered with a running average filter: Cn = (1-b... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.2 Derivation of Channel Quality Report | The channel quality is measured as the interference signal level during idle frames of the multiframe, when the serving cell is not transmitting. No measurements shall be taken on the BCCH carrier of the serving cell since the BTS transmits with constant output power on this carrier. For COMPACT, the channel quality is... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.2.1 Packet transfer mode | In packet transfer mode, the MS shall measure the interference signal level on the same carrier as the assigned PDCHs. The MS shall make these measurements during the search frames and PTCCH frames, which are not required for BSIC decoding or the timing advance procedure. For COMPACT, the MS shall estimate the interfer... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.2.2 Packet idle mode | In packet idle mode, the MS shall measure the interference signal level on the channels indicated by the parameter INT_MEAS_CHANNEL_LIST and, for an MS performing measurements according to clause 10.1.4.1, on the monitored PCCCH or CPCCCH and, if indicated in the EXT_FREQUENCY_LIST, on one additional carrier (see claus... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.3.2.3 Measurement reporting | The MS shall send a Channel Quality Report to the network in the PACKET DOWNLINK ACK/NACK and the PACKET RESOURCE REQUEST messages. The report contains the available γCH values for the carrier on which the message is sent as well as the RXQUAL, C and SIGN_VAR values (see clause 10.2.3.1.2). The conditions for including... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.2.4 Measurements at BSS side | A procedure shall be implemented in the BSS to monitor the uplink Rx signal level and quality on each uplink PDCH, active as well as inactive. The BSS shall also measure the Rx signal level and the quality of a specific MS packet transfer. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.3 Measurement requirements | The accuracy of the received signal level and interference measurements shall be as defined in clause 8.1.2. For COMPACT, the accuracy of the interference estimate, which is based upon received signal level during a PDTCH/PACCH block (see Annex C), is ± 2 dB in addition to the accuracy of the received signal level defi... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 10.4 Control parameters | The parameters employed to control the radio links for GPRS are shown in table 3. Table 3: Radio sub-system link control parameters for GPRS ((s) and (n) denote serving cell and non-serving cell respectively) Parameter name Description Range Bits Channel BA(GPRS) BCCH Allocation for GPRS re-selection Note: If PBCCH doe... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11 CTS mode tasks | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1 CTS idle mode tasks | Whilst attempting to attach to a CTS-FP, a CTS-MS shall implement the CTS cell selection procedure described in GSM 03.22. This procedure makes use of measurements and sub-procedures described in this clause. The procedure ensures that the CTS-MS is CTS attached to a CTS cell from which it can reliably decode downlink ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.1 CTS cell selection | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.1.1 Synchronization and measurements for CTS cell selection | The CTS-MS shall store the CTSBCH ARFCN for each CTS-FP the CTS-MS is enrolled with. In the modes where CTS cell selection is required (see GSM 03.22), for each CTS-FP the CTS-MS is enrolled with, the CTS-MS shall periodically attempt to synchronize to the stored CTSBCH carrier. When attempting to synchronize to the CT... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.1.2 Initial sychronization of CTS-MS | In order to perform upper layer procedures, e.g. the enrolment of a CTS-MS (see GSM 04.56), a special procedure shall be implemented in the CTS-FP, by which the initial synchronisation of a CTS-MS with the CTS-FP is eased. This procedure of initial synchronisation of CTS-MS shall be triggered by the CTS upper layers. T... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.2 Criterion for CTS cell selection | The path loss criterion parameter C1_CTS used for CTS cell selection is defined by: C1_CTS = Received Level Average - CTS_RXLEV_ACCESS_MIN where CTS_RXLEV_ACCESS_MIN = Minimum received level at the CTS-MS required for access to the system; this parameter shall be given by the CTS-FP to CTS-MS during the enrolment proce... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.3 Monitoring of CTSBCH and CTSPCH | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.3.1 Monitoring of received signal level | Whilst in CTS idle mode, the CTS-MS shall measure the received signal level of the CTSBCH and shall calculate the received level average of the CTSBCH carrier, the averaging being a running average on at least five collected measurement samples and a maximum time of 11 seconds (5*9*52 frames). The criterion C2_CTS defi... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.3.2 Downlink beacon failure | The downlink beacon failure criterion is based on the downlink beacon failure counter DBC. Whilst in CTS idle mode on a CTS cell, DBC shall be initialized to a value equal to the nearest integer to 90/N where N is the number of paging groups defined for the CTS-FP (see GSM 05.02 clause 6.5.7). Thereafter, whenever the ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.3.3 Downlink paging failure | The downlink paging failure criterion is based on the downlink paging failure counter DPC. Whilst in CTS idle mode on a CTS cell, DPC shall be initialized to a value equal to CTSPCH_DECOD (this parameter shall be given by the CTS-FP to the CTS-MS during the attachment procedure, see GSM 04.56). Thereafter, each time th... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.4 Procedures with reporting to the CTS-FP | Whilst in CTS idle mode, the CTS-FP may order to the CTS-MS to complete the procedures defined hereafter. The order for each procedure is sent to the CTS-MS during a dedicated connection (see GSM 04.56). For each of the procedures, a maximum time of processing is allowed. When multiple procedures are ordered in a singl... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.4.1 AFA monitoring | The reporting of the AFA monitoring procedure is used by the AFA algorithm for the frequency management of the CTS (see GSM 05.56). The parameters sent by the CTS-FP to the CTS-MS in the AFA monitoring order message shall be a list of n carriers: AFA monitoring frequency list, AMFL(1,...,n), together with the number of... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.4.2 BCCH detection | The reporting of the BCCH detection procedure may be used by the CTS-FP by the AFA algorithm and for the OFO request. The parameters sent by the CTS-FP to the CTS-MS in the BCCH detection message shall be a list of m carriers: BCCH detection frequency list, BDFL(1,..,m). For each carrier of the list, the CTS-MS shall a... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.1.4.3 Observed Frequency Offset (OFO) measurement | The reported OFO measurements shall be used by the CTS-FP to correct its frequency source (see GSM 05.10). The parameters sent by the CTS-FP to the CTS-MS in the OFO measurement message shall be a list of k BCCH carriers: OFO measurement BCCH list, OMBL(1,..,k). For each BCCH carrier of the list, the CTS-MS shall attem... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.2 Intra-cell handover | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.2.1 Overall process | The overall intra-cell handover process is implemented in the CTS-MS and CTS-FP. Measurement of radio subsystem downlink performance is made in the CTS-MS. These measurements are signalled to the CTS-FP for assessment. The CTS-FP measures the uplink performance for the CTS-MS being served. Initial assessment of the mea... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.2.2 CTS-MS measurement procedure | A procedure shall be implemented in the CTS-MS by which it monitors the downlink RX signal level and quality from its serving CTS cell. The requirements for the CTS-MS measurements are given in clause 11.5. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.2.3 CTS-FP measurement procedure | A procedure shall be implemented in the CTS-FP by which it monitors the uplink RX signal level and quality from each CTS-MS being served by the CTS cell. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.2.4 Strategy | The intra-cell handover strategy employed by the CTS-FP for radio link control determines the handover decision that will be made based on the CTS measurement results reported by the CTS-MS and made by the CTS-FP, and on various parameters set for each CTS-FP. Due to the Total Frequency Hopping applied to the traffic c... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3 RF power control | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.1 Overall process | RF power control is employed to minimize the transmit power required by CTS-MS or CTS-FP whilst maintaining the quality of the radio links. By minimizing the transmit power levels, interference to co-channel users is reduced. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.2 CTS-MS implementation | RF power control shall be implemented in the CTS-MS. The power control level to be employed by the CTS-MS on the uplink channel is indicated by means of the power control information sent either in the layer 1 header of each SACCH message block (see GSM 04.04) on the corresponding downlink channel, or in a dedicated si... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.3 CTS-MS power control range | The range over which a CTS-MS shall be capable of varying its RF output power shall be from its maximum authorized output power CTS_MS_MAX_TXPWR, down its lowest nominal output power (as defined in GSM 05.05), in steps of nominally 2 dB. GSM 05.05 gives a detailed definition of the RF power level step size and toleranc... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.4 CTS-FP implementation | RF power control shall be implemented in the CTS-FP. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.5 CTS-FP power control range | The range over which a CTS-FP shall be capable of varying its RF output power shall be from its maximum authorized output power CTS_FP_MAX_TXPWR down its lowest nominal output power (as defined in GSM 05.56), in steps of nominally 2 dB. GSM 05.56 gives a detailed definition of the RF power level step size and tolerance... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.6 Strategy | The RF power control strategy employed by the CTS-FP determines the ordered power control level that is signalled to the CTS-MS, and the power control level that is employed by the CTS-FP. The power control level to be employed in each case shall be based on the CTS measurement results reported by the CTS-MS and made b... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.3.7 Timing | Upon receipt of a command from an SACCH to change its power level, the CTS-MS shall change to the new level at a rate of one nominal 2 dB power control step every 60 ms (13 TDMA frames), i.e. a range change of 15 steps should take about 900 ms. The change shall begin at the first TDMA frame belonging to the next report... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.4 Radio link failure | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.4.1 Criterion | The criterion for determining Radio Link Failure in the CTS-MS shall be based on the success rate of decoding messages on the downlink SACCH. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.4.2 CTS-MS procedure | The aim of determining radio link failure in the CTS-MS is to ensure that calls with unacceptable voice/data quality, which cannot be improved either by RF power control or intra-cell handover, are either re-established or released in a defined manner. The radio link failure criterion is based on the radio link counter... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.4.3 CTS-FP procedure | The criteria for determining radio link failure in the CTS-FP should be based upon either the error rate on the uplink SACCH or on RXLEV/RXQUAL measurements reported by the CTS-MS. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5 Radio link measurements | Radio link measurements are used in the intra-cell handover and RF power control processes. The measurements are made over each SACCH multiframe, which is 104 TDMA frames (480 ms) for a TCH. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.1 Signal strength | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.1.1 General | The received signal level may be employed as a criterion in the RF power control and intra-cell handover processes. ETSI ETSI TS 100 911 V8.5.0 (2000-10) 74 (GSM 05.08 version 8.5.0 Release 1999) |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.1.2 Physical parameter | As specified in clause 8.1.2, measured by the CTS-MS and CTS-FP. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.1.3 Statistical parameters | For each channel, the measured parameters (RXLEV) shall be the average of the received signal level measurement samples in dBm taken on that channel within the reporting period of length one SACCH multiframe defined in 11.5.4. In averaging, measurements made during previous reporting periods shall always be discarded. ... |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.1.4 Range of parameter | As specified clause in clause 8.1.4. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.2 Signal quality | |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.2.1 General | The received signal quality shall be employed as a criterion in the RF power control and intra-cell handover processes. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.2.2 Physical parameter | As specified in clause 8.2.2, measured by the CTS-MS and CTS-FP. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.2.3 Statistical parameters | For each channel, the measured parameters (RXQUAL) shall be the received signal quality, averaged on that channel over the reporting period of length one SACCH multiframe defined in clause 11.5.4. In averaging, measurements made during previous reporting periods shall always be discarded. |
4f752c751d635d19ec70230db7aa6c3c | 100 911 | 11.5.2.4 Range of parameter | As specified in clause 8.2.4. |
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