RSCP is used in UMTS as a handover criterion and in DL and UL open loop Reported value Measured quantity value CPICH_RSCP_LEV _00 CPICH RSCP <-115 CPICH_RSCP_LEV _01 -115 ≤ CPICH RSCP < -114 CPICH_RSCP_LEV _02 -114 ≤ CPICH RSCP < -113 ... ... CPICH_RSCP_LEV _89 -27 ≤ CPICH RSCP < -26 CPICH_RSCP_LEV _90 -26 ≤ CPICH RSCP < -25 CPICH_RSCP_LEV _91 -25 ≤ CPICH RSCP CPICH_RSCP_LEV _92 CPICH_RSCP_LEV _93 ... ... CPICH_RSCP_LEV _99 (spare, value not assigned) RSCP is an acronym used in UMTS and other CDMA cellular communications s While RSCP can be defined generally for any CDMA system, it is more spec Definition: the received power on one code after de-spreading measured b Pathloss = Transmitted channel power [dBm] - RSCP [dBm] In UMTS FDD-mode RSCP is measured on Primary CPICH, in TDD-mode it is me In UMTS RSCP is measured in dBm (decibels relative to 1 watt power) with The accuracy with which RSCP is reported in UMTS FDD is in the range of (spare, value not assigned) (spare, value not assigned)
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RSCP is used in UMTS as a handover criterion and in DL and UL open loop power control, UL open loop power control and for calculation of pathloss using the formula:
Reported value Measured quantity value CPICH_RSCP_LEV _00 CPICH RSCP <-115 CPICH_RSCP_LEV _01 -115 ≤ CPICH RSCP < -114 CPICH_RSCP_LEV _02 -114 ≤ CPICH RSCP < -113 ... ... CPICH_RSCP_LEV _89 -27 ≤ CPICH RSCP < -26 CPICH_RSCP_LEV _90 -26 ≤ CPICH RSCP < -25 CPICH_RSCP_LEV _91 -25 ≤ CPICH RSCP CPICH_RSCP_LEV _92 (spare, value not assigned) CPICH_RSCP_LEV _93 (spare, value not assigned) ... ... CPICH_RSCP_LEV _99 (spare, value not assigned)
RSCP is an acronym used in UMTS and other CDMA cellular communications systems and stands for
While RSCP can be defined generally for any CDMA system, it is more specifically used in UMTS. Also, while RSCP can be measured in principle on the
Definition: the received power on one code after de-spreading measured by UE on the pilot bits on a given channel. The reference point for the RSCP is the antenna connector of the UE. If Tx diversity is applied on the measured channel then the received code power from each antenna is separately measured and summed together in watt to produce a total received code power on the measured channel.
Pathloss = Transmitted channel power [dBm] - RSCP [dBm]
In UMTS FDD-mode RSCP is measured on Primary CPICH, in TDD-mode it is measured on the pilot bits of Primary
In UMTS RSCP is measured in dBm (decibels relative to 1 watt power) within a bandwidth of 3.84 The accuracy with which RSCP is reported in UMTS FDD is in the range of 6 dB to 11 dB (absolute accuracy) and ±3 dB (relative accuracy).
RSCP is used in UMTS as a handover criterion and in DL and UL open loop power control, UL open loop power control and for calculation of pathloss using the formula:
RSCP=RSSI +EcNo
cellular communications systems and stands for Received Signal Code Power.
While RSCP can be defined generally for any CDMA system, it is more specifically used in UMTS. Also, while RSCP can be measured in principle on the downlink (DL) as well as on the uplink (UL), it is usually associated only with the downlink and thus it is presumed to be measured by the
Definition: the received power on one code after de-spreading measured by UE on the pilot bits on a given channel. The reference point for the RSCP is the antenna connector of the UE. If Tx diversity is applied on the measured channel then the received code power from each antenna is separately measured and summed together in watt to produce a total received code power on the measured channel.
-mode it is measured on the pilot bits of Primary CCPCH.
(decibels relative to 1 watt power) within a bandwidth of 3.84 MHz. In UMTS FDD messages RSCP is transmitted as an integer value in the range of -115 dBm to -25 dBm. The value is coded into integers from 0 to 99 according to the following table: The accuracy with which RSCP is reported in UMTS FDD is in the range of 6 dB to 11 dB (absolute accuracy) and ±3 dB (relative accuracy).
uplink (UL), it is usually associated only with the downlink and thus it is presumed to be measured by the UE and reported to the Node-B. It is defined by
Definition: the received power on one code after de-spreading measured by UE on the pilot bits on a given channel. The reference point for the RSCP is the antenna connector of the UE. If Tx diversity is applied on the measured channel then the received code power from each antenna is separately measured and summed together in watt to produce a total received code power on the measured channel.
. In UMTS FDD messages RSCP is transmitted as an integer value in the range of -115 dBm to -25 dBm. The value is coded into integers from 0 to 99 according to the following table:
and reported to the Node-B. It is defined by 3GPP as follows:
Definition: the received power on one code after de-spreading measured by UE on the pilot bits on a given channel. The reference point for the RSCP is the antenna connector of the UE. If Tx diversity is applied on the measured channel then the received code power from each antenna is separately measured and summed together in watt to produce a total received code power on the measured channel.
Figure 1 – Interaction of radio network planning with other radio network activities
System Dimensioning
Radio NetworkPlanning
Pre-launch Optimisation
Post-launch Optimisation
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning
• Site selection• Site design• 3G neighbour lists• 2G neighbour lists• Scrambling codes• Location areas• Routing areas• RNC areas
Link budget analsysis
• Node B count and configuration
• RNC count and configuration
• Transmission capacity and configuration
• RF carriers• Sectorisation• ROC to CEC• Node B power• Baseband proc.• Transmission• HSDPA• Microcells
Capacity Evolution
Performance Monitoring
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning• Additional sites• User experience
optimisation
Wide area parameter tuning
System Dimensioning
Radio NetworkPlanning
Pre-launch Optimisation
Post-launch Optimisation
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning
• Site selection• Site design• 3G neighbour lists• 2G neighbour lists• Scrambling codes• Location areas• Routing areas• RNC areas
Link budget analsysis
• Node B count and configuration
• RNC count and configuration
• Transmission capacity and configuration
• RF carriers• Sectorisation• ROC to CEC• Node B power• Baseband proc.• Transmission• HSDPA• Microcells
Capacity Evolution
Performance Monitoring
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning• Additional sites• User experience
optimisation
Wide area parameter tuning
System Dimensioning
Radio NetworkPlanning
Pre-launch Optimisation
Post-launch Optimisation
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning
• Site selection• Site design• 3G neighbour lists• 2G neighbour lists• Scrambling codes• Location areas• Routing areas• RNC areas
Link budget analsysis
• Node B count and configuration
• RNC count and configuration
• Transmission capacity and configuration
• RF carriers• Sectorisation• ROC to CEC• Node B power• Baseband proc.• Transmission• HSDPA• Microcells
Capacity Evolution
Performance Monitoring
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning• Additional sites• User experience
optimisation
Wide area parameter tuning
System Dimensioning
Radio NetworkPlanning
Pre-launch Optimisation
Post-launch Optimisation
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning
• Site selection• Site design• 3G neighbour lists• 2G neighbour lists• Scrambling codes• Location areas• Routing areas• RNC areas
Link budget analsysis
• Node B count and configuration
• RNC count and configuration
• Transmission capacity and configuration
• RF carriers• Sectorisation• ROC to CEC• Node B power• Baseband proc.• Transmission• HSDPA• Microcells
Capacity Evolution
Performance Monitoring
• 3G neighbour lists• 2G neighbour lists• Antenna tilts• Local area
parameter tuning• Additional sites• User experience
optimisation
Wide area parameter tuning
chanellization code generation
SF = 3.84Mcps / bit rateThe longer the code, the lower will be data rateThe SF correspond to the length of the code and the number of channels sending at certain bit rate
1. WCDMA uses 18 Shift Registers to create the SC used in DL. 2. This produces a code length of 262 143( 218 -1) chips; however only the first38400 chips are used by the system.3. Since the Chip rate is 3.84 Mchip/s, it will take 10 milisec to send 38400 chips.4. This time duration is referred to as one Frame5. The Frame is sub-divided into 15 TS, each containing 2560 (38400/15) chips.6. The duration of one TS is 666.667 uSec.
384003840000
1 TS =(0.01/15)*1 =666.667 u sec
2560 chip * 15 TS =38400 chip
1. WCDMA uses 18 Shift Registers to create the SC used in DL. 2. This produces a code length of 262 143( 218 -1) chips; however only the first38400 chips are used by the system.3. Since the Chip rate is 3.84 Mchip/s, it will take 10 milisec to send 38400 chips.4. This time duration is referred to as one Frame5. The Frame is sub-divided into 15 TS, each containing 2560 (38400/15) chips.6. The duration of one TS is 666.667 uSec.
qSearchC (QSRC) Qsearch_Cthreshold for multi-RAT MS
minIntUnsuccIsHo (UMIU)
MIN_INTERVAL_BETWEEN_UNSUCC_ISHO_ATTEMPT
min interval between unsucc ISHO attempt
utranHoThScTpdc (LTSC)
LOAD_THRESHOLD_FOR_SC_IS_HO
min traffic load for speech call
Nokia parameterSpecification name
Parameter
Changeable Parameter
Qsearch_C_Initial
FDD_MULTIRAT_REPORTING
3G_SEARCH_PRIO
FDD_REP_QUANT
Specification name
Indicates the Qsearch value to be used in connected mode before Qsearch_C is received
The number of cells from the access technology/mode FDD that shall be included in the measurement report
Indicates if 3G cells may be searched when BSIC decoding is required
Indicates the reporting quantity for UTRAN FDD cells
Parameter explanation
Hidden Parameter
•Load Threshold for Speech Calls inter-RAT Handover utranHoThScTpdc = 80%•Min Ec/No threshold for a handover to the UTRAN adjacent cell minEcnoThreshold = -15 dB•qSearchC = 7 (measure UTRAN adjacent cells always)
1Load of the serving cell = 45% and the measured Ec/No = - 20 dB --> Handover to the UTRAN not possible due to low load and low Ec/No2Load of the serving cell = 45% and the measured Ec/No = - 10 dB --> Handover to the UTRAN not possible due to low load3Load of the serving cell = 95% and the measured Ec/No = -10 dB --> Handover to the UTRAN possible
-15 dB -24…0.5 dB minEcnoThreshold(MET)
15 (never) rec. 7 (always)
0…15 qSearchC (QSRC)
3 s0…255 sminIntUnsuccIsHo (UMIU)
80%0-100%utranHoThScTpdc (LTSC)
Default value
RangeNokia parameter
Not tunable, Fixed value 0
0 = use Qsearch_I, 1 = 唴 (always)
Indicates the Qsearch value to be used in connected mode before Qsearch_C is received
Not tunable, Fixed value 2
0…3The number of cells from the access technology/mode FDD that shall be included in the measurement report
Not tunable, Fixed value 1
0 = no, 1 = yes
Indicates if 3G cells may be searched when BSIC decoding is required
Not tunable, Fixed value 1
0=RSCP, 1=EC/NO
Indicates the reporting quantity for UTRAN FDD cells
NoteValue rangeParameter explanation
•Load Threshold for Speech Calls inter-RAT Handover utranHoThScTpdc = 80%•Min Ec/No threshold for a handover to the UTRAN adjacent cell minEcnoThreshold = -15 dB•qSearchC = 7 (measure UTRAN adjacent cells always)
1Load of the serving cell = 45% and the measured Ec/No = - 20 dB --> Handover to the UTRAN not possible due to low load and low Ec/No2Load of the serving cell = 45% and the measured Ec/No = - 10 dB --> Handover to the UTRAN not possible due to low load3Load of the serving cell = 95% and the measured Ec/No = -10 dB --> Handover to the UTRAN possible
>>With RAS05.1, a new BTS called Flexi BTS is available
>> Example on, System module capacity with 192CEs, 1-3 cells, with option:-1. 16 HSDPA users/BTS (only 1 cell) -->>32 CE s only
>>The system module provide up to 192 CEs with 1-3 cells configuration - require 16 CEs for CCCH processing>> For HW point 240 CEs Capacity(with 26 CE for common channel processing)>> Basic HSDPA needs 32 CEs per cell ,thus enabling 16 HSDPA users/cell >>With RAS05.1 ED, the Baseband Extension Module is available, increasing Flexi BTS to 2*192=384 CE
2. 16 HSDPA users/cell -->>32 CEs /cell or 96 CEs /site/BTS (32*3)
user data rate/kbps (BEARER)
(1) system module max cap, with 1-3 cells CCCHs and HSDPA activated in BTS ( only 1 cell)
(2) system module max cap, with 1-3 cells CCCHs and HSDPA activated in 3 cells
(3) system module max cap, with 1-3 cells CCCHs ( HSDPA not activated)
>> CE consumption with Flexi BTS
16 CEs for CCCH processing
OverView
>> RNC dimensioning is based on RNC throughput requirement in :-1. Mbps and Erlangs2. No of BTS/cells to be connected to RNC3. Total sum of AAL2 ( ATM Adaptation Layer Type 2) connectivity for Iub, Iur and Iu-CS interfaceTherefore, the RNC dimensioning requires preliminary dimensioning of BTSs, Uu, Iub, Iur and Iu interfaces
With RAS05.1, the new RNC450 with enhanced capacity is availableThis RNC450 can be delivered in 3 capacity step with Iub throughput of 150, 300 and 450 Mbps
Eg:- RNC Dimensioning
There are 1000 BTSs, with an average busy hour traffic per BTS and SHO traffic also included:-
RNC450 (FROM NED)Table: Capacity and reference call mix model
High capacity RNC RNC450/150 defaultNumber of subscribers 181 000Busy hour call attempts 240 000
3. Total sum of AAL2 ( ATM Adaptation Layer Type 2) connectivity for Iub, Iur and Iu-CS interface Erlangs 4 000Therefore, the RNC dimensioning requires preliminary dimensioning of BTSs, Uu, Iub, Iur and Iu interfaces Iub throughput Mbit/s 150
Number of carriers 600Number of BTSs 200AAL2UP Connectivity Mbits/sec 1 950
This RNC450 can be delivered in 3 capacity step with Iub throughput of 150, 300 and 450 Mbps RRC connected mode users 35 000
Table: Voice Service Call mixProperty Value
There are 1000 BTSs, with an average busy hour traffic per BTS and SHO traffic also included:- 90s
Proportion of UE originating calls (UOC) 70%Proportion of UE terminating calls (UTC) 30%
63%
Proportion of handovers 40%- hard handovers 0.1 per call- soft handovers 3 per callBearer 16 kbit/sTraffic per user 22 mErl
Sum Kbps
132.2 Table: HSDPA capacity figures417 RNC450/150550 Max HSDPA peak rate per UE [Mbit/s] 3.6
1100 HSDPA active users per cell 16360
Iu-ps HSDPA net bit rate [Mbit/s] 135HSDPA BTS 200HSDPA carriers 600
Table: InterfacesConfiguration Interfaces
STM-1 / OC-3Max number of cards
RNC450/150
RNC450/300
RNC450/450 12
8000 Erlangs, OR 450 Mbps PS data, OR 112.5Mbps CS data on Iub.
Mean holding time (MHT)1
For terminating call attempts, the proportion of no-answer call attempts to paging request (NAC)
HSDPA active users per RNC
1100kbps*1000BTSs =1100 Mbps to Iub
8000 Erlangs, OR 450 Mbps PS data, OR 112.5Mbps CS data on Iub.
4 or 61
8 or 102
by their launch phase in order to have capacity available
TRAFFIC MIX RULE FORMULA
AMR traffic(Erlang) /max AMR traffic (Erl) + CS traffic( Mbps)/ max Iub throughput (Mbps) + PS traffic (Mbps)/max Iub throughput (Mbps) <=1
AMR traffic(Erlang) /max AMR traffic (Erl) + CS traffic( Mbps)/ max Iub throughput (Mbps) + PS traffic (Mbps)/max Iub throughput (Mbps) <=1
Find HSPDSCHcode set enable and code combination description as per below, please check the ABH1RNC01 dump to clearify R6 sites with code license key installed part of RU10 RNC upgarde, also check CE No./WCell.
to calculate this, convert the HSDPSCHcodeset value to Binary, then leave first five ZEROs from right to left, then if the 6th digit is 1 it means 5 codes is activated. If 7th digit is 1/0 it means 7th code is activated/deactivated.... it goes on ....
Find HSPDSCHcode set enable and code combination description as per below, please check the ABH1RNC01 dump to clearify R6 sites with code license key installed part of RU10 RNC upgarde, also check CE No./WCell.
basic
NSN Global standard
to calculate this, convert the HSDPSCHcodeset value to Binary, then leave first five ZEROs from right to left, then if the 6th digit is 1 it means 5 codes is activated. If 7th digit is 1/0 it means 7th code is activated/deactivated.... it goes on ....
Find HSPDSCHcode set enable and code combination description as per below, please check the ABH1RNC01 dump to clearify R6 sites with code license key installed part of RU10 RNC upgarde, also check CE No./WCell.
to calculate this, convert the HSDPSCHcodeset value to Binary, then leave first five ZEROs from right to left, then if the 6th digit is 1 it means 5 codes is activated. If 7th digit is 1/0 it means 7th code is activated/deactivated.... it goes on ....
to calculate this, convert the HSDPSCHcodeset value to Binary, then leave first five ZEROs from right to left, then if the 6th digit is 1 it means 5 codes is activated. If 7th digit is 1/0 it means 7th code is activated/deactivated.... it goes on ....
Frequency Bands and ARFCNFrequency Band ARFCN
GSM 450 10 MHz 450.4 to 457.6 MHz 460.4 to 467.6 MHz 259 to 293
GSM 480 10 MHz 478.8 to 486 MHz 488.8 to 496 MHz 306 to 340
GSM 750 30 MHz 747 to 762 MHz 777 to 792 MHz 438 to 511
GSM 850 45 MHz 824 to 849 MHz 869 to 894 MHz 128 to 251
P-GSM 900 45 MHz 890 to 915 MHz 935 to 960 MHz 1 to124
E-GSM 900 45 MHz 880 to 915 MHz 925 to 960 MHz 0 to124
and
975 to 1023
R-GSM 900 45 MHz 876 to 915 MHz 921 to 960 MHz 0 to124
and
955 to 1023
DCS 1800 45 MHz 1710 to 1785 MHz 1805 to 1880 MHz 512 to 885
PCS 1900 45 MHz 1850 to 1910 MHz 1930 to 1990 MHz 512 to 810
ARFCN to Frequency Calculator / TableARFCN stands for Absolute Radio Frequency Channel Number. ARFCN is a radio channel numbering scheme used to identify specific RF channels in a cellular mobile radio system.
To calculate ARFCN channel frequency, enter Absolute Radio Frequency Channel Number (ARFCN) below. Or, enter start and end ARFCN values to generate a table.
ARFCN stands for Absolute Radio Frequency Channel Number. ARFCN is a radio channel numbering scheme used to identify specific RF channels in a cellular mobile radio system.
To calculate ARFCN channel frequency, enter Absolute Radio Frequency Channel Number (ARFCN) below. Or, enter start and end ARFCN values to generate a table.
HSDPAIn the future, user application are likely to involve the transport of large volumes of dataand require high bit ratesHSDPA introduces a new transport channel type - HS-DSCHthat makes efficient use of valuable radio freq resources and takes into accout busty packet datathis new transport channel share multiple access code, transmission power and use infrastructure hardware between usersThe radio n/w resource can be used efficiently to serve a large number of users who are accessing to the resourceIn other word, several users can be time multiplxed so that during silent periods, the resource are available for other users.
HSDPA offers max peak rates of up to 14.4 Mbps in 5 Mhz channelHowever, more importantly than the peak rate is packet data throughput capacity, which is improved significantly. This will increase the number of users that can be supported at higher data rates on a single radio carrier.
Another important characteristic of HSDPA is the reduced variance in DL transmission delayA guaranteed short delay time is important for many applications such as interactive games.In general, HSDPA's enhancement can be used to implement the efficiently the "interactive" and "background " QoS.HSDPA's high data rates also will improve the use of streaming applications on share packet channelwhile the shorthened roundtrip (RTT) will benefit web-browsing application
HSDPA FeaturesHSDPA enhanced data rates and spectrum efficiency HSDPA improves system capacity and increase user data rates in DL , that is, transmission from Radio Access n/w(RAN) to mobileThis improved performance is BASED on:1. ADAPTIVE MODULATION and CODING(Data rates are optimised dynamically during the session according to radio link quality - This ensures HIGHEST possible data rates to end users)2. A FAST SCHEDULING function, which is controlloed in WBTS, rather than by RNC(3. FAST RETRANSMISSION with soft combining and incremental redundancy
this new transport channel share multiple access code, transmission power and use infrastructure hardware between usersThe radio n/w resource can be used efficiently to serve a large number of users who are accessing to the resourceIn other word, several users can be time multiplxed so that during silent periods, the resource are available for other users.
However, more importantly than the peak rate is packet data throughput capacity, which is improved significantly. This will increase the number of users that can be supported at higher data rates on a single radio carrier.
In general, HSDPA's enhancement can be used to implement the efficiently the "interactive" and "background " QoS.HSDPA's high data rates also will improve the use of streaming applications on share packet channel
HSDPA improves system capacity and increase user data rates in DL , that is, transmission from Radio Access n/w(RAN) to mobile
(Data rates are optimised dynamically during the session according to radio link quality - This ensures HIGHEST possible data rates to end users)
Terminal Category Support
The 3GPP standard includes different optional feature support as well as parameter settings corresponding to the possiblitity to support different HSPA terminal categories
Different choices made regarding these parameters and features could impact the possibility for full support of these different terminal categories
HSDPAHSDPA Category HSDPA Codes Modulation Maximum bit rate(Mbps)
HSUPAHSUPA Category HSUPA Codes TTI Length Maximum bit rate(Mbps)
Category 1 1 10 ms only 0.73Category 2 2 10 ms/ 2 ms 1.46Category 3 2 10 ms only 1.46Category 4 2 10 ms/ 2 ms 2.00 / 2.92Category 5 2 10 ms only 2.00Category 6 4 10 ms/ 2 ms 2.00 / 5.76
The 3GPP standard includes different optional feature support as well as parameter settings corresponding to the possiblitity to support different HSPA terminal categories
Different choices made regarding these parameters and features could impact the possibility for full support of these different terminal categories
UL Service DPCH Generic Nokia UL Service Link BudgetsService Type Nokia Specific Speech CS DataUplink bit rate No 12.2 64
Maximum transmit power UE dependant 21 21Terminal antenna gain UE dependant 0 2
Body loss No 3 0Transmit EIRP UE dependant 18 23
Chip rate No 3.84 3.84Processing gain No 25.0 17.8Required Eb/No Yes 4.4 2
Target uplink load No 50 50Rise over thermal noise No 3.0 3.0
Thermal noise power No -108 -108Receiver noise figure Yes 3 3
Interference floor No -102 -102Receiver sensitivity Yes -122.6 -117.8
Node B antenna gain No 18.5 18.5Cable loss No 2 2
Benefit of using MHA No 2 2Fast fading margin Yes 1.8 1.8Soft handover gain Yes 2 2
Building penetration loss No 12 12Indoor location probability No 90 90Indoor standard deviation No 10 10
Slow fading margin No 7.8 7.8Isotropic power required Yes -121.5 -116.7Allowed propagation loss Yes 139.5 139.7
DL Service DPCH Generic Nokia DL Service Link BudgetsService Type Nokia Specific Speech CS Data
Downlink bit rate No 12.2 64Maximum transmit power Yes 34.2 37.2
Cable loss No 2 2MHA insertion loss Yes 0.5 0.5
Node B antenna gain No 18.5 18.5Transmit EIRP Yes 50.2 53.2
Processing gain No 25.0 17.8Required Eb/No UE dependant 7.9 5.3Target loading No 80 80
Rise over thermal noise No 7 7Thermal noise power No -108 -108Receiver noise figure UE dependant 8 8
Interference floor No -93 -93Receiver sensitivity UE dependant -110.1 -105.5
Terminal antenna gain UE dependant 0 2Body loss No 3 0
Fast fading margin UE dependant 0 0Soft handover gain UE dependant 2 2
MDC gain UE dependant 1.2 1.2Building penetration loss No 12 12Indoor location probability No 90 90Indoor standard deviation No 10 10
Slow fading margin No 7.8 7.8Isotropic power required Yes -90.5 -90.9Allowed propagation loss Yes 140.7 144.1
DL CPICH Link Budget Generic Nokia DL CPICH Link BudgetService Type Nokia Specific CPICH
Maximum transmit power Yes 33 dBmCable loss No 2 dB
MHA insertion loss Yes 0.5 dBiNode B antenna gain No 18.5 dBi
Transmit EIRP Yes 49 dBm
Required Ec/Io UE dependant -15 dB
Target loading No 80 %Rise over thermal noise No 7 dB
Thermal noise power No -108 dBmReceiver noise figure UE dependant 8 dB
Interference floor No -93 dBmReceiver sensitivity UE dependant dBm
Terminal antenna gain UE dependant 0 dBiBody loss No 3 dB
Fast fading margin No 0 dB
Building penetration loss No 12 dBIndoor location probability No 90 %Indoor standard deviation No 10 dB
Slow fading margin No 7.8 dBIsotropic power required Yes -85.2 dBm
Allowed propagation loss Yes 134.2 dB
The 3G link budget results must be adjusted prior to being used within the planning toolLink budget results are generated in terms of maximum allowed path loss whereas the majority of planning tools display contours of signal strength
This means that a relatively arbitrary Node B transmit power must be selected and then a signal strength threshold computed by subtracting the link budget maximum allowed path loss.
PS Data64 kbps21 dBm kTB = assumed temperature of Node B Receiver2 dBi
0 dB dBm = 10*log(mW) 23 dBm 1 0.00
3.84 Mcps17.8 dB Processing Gain=10*LOG (Chip Rate/Bit Rate)
2 dB Service C/I Requirement=EbNo - Processing Gain50 %3.0 dB RiseOverThermalNoise= -10*LOG(1 - Target Load)
-108 dBm Thermal Noise Power=10*LOG(kTB)=10*LOG(1.4*10^(-23)*290*(3.84*10^6))=-138dBW=-108dBm3 dB
-116.7 dBm Isotropic Power Required=Receiver Sensitivity - Antenna Gain + Cable Loss - MHA Benefit +Fast Fading Margin - Soft HO Gain + Building Penetration Loss + Slow Fading Margin139.7 dB Allowed Propagation Loss=Transmit EIRP - Isotropic Power Required
PS Data64 128 384 kbps Nokia's admission control determines the maximum downlink transmit power for real time services according to:
37.2 40 40 dBm2 2 2 dB
0.5 0.5 0.5 dB18.5 18.5 18.5 dBi for non-real time services according to:53.2 56 56 dBm17.8 14.771 10 dB
5 4.7 4.8 dB80 80 80 %7 7 7 dB PtxDPCHmax and PtxDLabsMax are the RNC databuild parameters. MaxDLCalulated is computed from the expression:
The CPICH link budget is similar to the downlink service link budget
In this case the transmit power is defined by the PtxPrimaryCPICH RNC databuild parameter
The downlink service Eb/No requirement and processing gain are replaced by the CPICH Ec/Io requirement.This is equivalent to the downlink service C/I requirement
The terminal antenna gain is assumed to be 0 dB.This represents a worst case assumption
The CPICH is not combined during soft handover and so there are no soft handover gains for the CPICH link budget.
The downlink CPICH allowed propagation loss should be compared with the uplink service and downlink service allowed propagation losses.
Link budget results are generated in terms of maximum allowed path loss whereas the majority of planning tools display contours of signal strength
This means that a relatively arbitrary Node B transmit power must be selected and then a signal strength threshold computed by subtracting the link budget maximum allowed path loss.
Isotropic Power Required=Receiver Sensitivity - Antenna Gain + Cable Loss - MHA Benefit +Fast Fading Margin - Soft HO Gain + Building Penetration Loss + Slow Fading Margin
Nokia's admission control determines the maximum downlink transmit power for real time services according to:
PtxDPCHmax and PtxDLabsMax are the RNC databuild parameters. MaxDLCalulated is computed from the expression:
In this case the transmit power is defined by the PtxPrimaryCPICH RNC databuild parameter
The downlink service Eb/No requirement and processing gain are replaced by the CPICH Ec/Io requirement.
The CPICH is not combined during soft handover and so there are no soft handover gains for the CPICH link budget.
The downlink CPICH allowed propagation loss should be compared with the uplink service and downlink service allowed propagation losses.
This means that a relatively arbitrary Node B transmit power must be selected and then a signal strength threshold computed by subtracting the link budget maximum allowed path loss.