Link Budget for LTE-A

Link Budget for LTE & LTE-A(Downlink)Link Budget equationPrx = Ptx + Gtx + Grx PL FMREFSENS = KTB + NF + SINR + IM 3 (dBm)Prx >= REFSENS Throughput(SNR)IM = Implementation LossConsiderationMax Tx Power (BS)Propagation ModelsAntenna Pattern & Gain (Rx & Tx antenna)Channel BandwidthModulation & Coding SchemesReceiver SensitivityNoise PowerSNRMIMOOthersMargins (Shadowing, Interference)Noise Figure (9dB)

Max Tx PowerTable 4.6: E-UTRA FDD and E-UTRA TDD reference base station parameters[Ref: 3GPP TR 36.942 V10.2.0 (2010-12)]ParameterValueNoteMaximum UE power24dBm[6]Minimum UE power-30dBm[3]Noise Figure*9dB[4]Table 4.8: E-UTRA FDD and E-UTRA TDD reference UE parametersParameterValueNoteMaximum BS power43dBm for 1.25, 2.5 and 5MHz carrier46dBm for 10, 15 and 20MHz carrier[4]Maximum power per DL traffic channel32dBmNoise Figure5dB[4]Max Tx Power

[3] Guidelines for evaluation of radio interface technologies for IMT -ITU (ITE-R M.2135-1)Propagation Models

Rural Macro, Suburban Macro, Urban Macro & Micro, Indoor HotspotLOS & NLOS for all aboveFrequency = 2.6 GHzhBS = 25m/30m??Shadowing distribution??

[3] Guidelines for evaluation of radio interface technologies for IMT -ITU (ITE-R M.2135-1)Antenna

is the 3dB beam width which corresponds to 65 degrees, and is the maximum attenuation

Rural AreaUrban Area900 MHz2000 MHz900 MHzBS antenna gain (dBi) (including feeder loss)151512BS antenna height (m)453030[Ref: 3GPP TR 36.942] For UE antennas, a omni-directional radiation pattern with antenna gain 0dBi is assumed 15 - 18 dBi ?Channel Bandwidth

BS channel aggregation??Channel Aggregation (40,60, 80, 100???)Modulation and Coding Schemes (MCS)

[2] 3GPP TS 36.213Throughput Calculation

Figure A.4 Throughput of a set of Coding and Modulation Combinations, AWGN channels assumed[1] 3GPP TR 36.942Throughput Calculation

[1] 3GPP TR 36.942Throughput Calculation

Figure A.1 Throughput vs SNR for Baseline E-UTRA Coexistence Studies

[1] 3GPP TR 36.942Throughput calculation (Table)Link Layer Throughput?1234567891001632568812015217620822425612456881441762082242563283442327214417620825629632837642434010417620825632839244050456845612020825632840848855263269657214422432842450460068077687226712148022162984375243925160599267127480

Table 7.1.7.2.1-1: Transport block size table (dimension 27110)TBS_L1TBS_L2TBS_L1TBS_L2TBS_L1TBS_L2TBS_L1TBS_L2154431123752748010296206162833657336160832403880773610680213842929659256167233684008799211064221523057661664173634964136824811448229203170463776180036244264850411832236883285666592Table 7.1.7.2.2-1: One-layer to two-layer TBS translation tableTBS table and Layer 2, 3 & 4 mapping[2] 3GPP TS 36.213Throughput CalculationUsing EquationNo as accurateUsing TableNo SNR value provided

Possible solution Combine table with equationOther method?Nokia Siemens Networks[LTE Link Budget] Calculate Receiver Sensitivity[6] LTE The UMTS Long Term Evolution From Theory to Practice

REFSENS = KTB + NF + SINR + IM 3 (dBm)Example Link Budget TableExcel sheetThroughput vs. Distance (Plot)to be includedChannel Aggregation (LTE-A)Max transmit power?Throughput due to Channel AggregationMultiply by a factor?SNR required due to channel aggregationAdding thermal noise only?MIMOSNR required if 2x2, 3x3 & 4x4 etc??Coverage calculation(CDF generation)How to calculate it?Area throughput CDFUser throughput CDFReferences[1] 3GPP TR 36.942, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Frequency (RF) system scenarios, V10.2.0 (2010-12).[2] 3GPP TS 36.213, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 10), V10.5.0 (2012-03).[3] Guidelines for evaluation of radio interface technologies for IMT-Advanced, ITU-R, 2009[4] Harri Holma and Antti Toskala, LTE for UMTS OFDMA and SC-FDMA Based Radio Access, WILEY, 2009.[5] Stefamoa Sesoa, Issam Toufik, Matthew Baker, LTE The UMTS Long Term Evolution From Theory to Practice, WILEY, 2009[6] Erik Dahlman, Stefan parkvall, Hohan Skold, LTE/LTE-Advanced for Mobile Broadband, Elsevier 2011.[7] LTE Link Budget, Nokia Siemens NetworksChart1-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-19.8367346939-17.693877551-15.6734693878-13.7755102041-12-10.3469387755-8.8163265306-7.4081632653-6.1224489796-4.9591836735-3.9183673469-3-2.2040816327-1.5306122449-0.9795918367-0.5510204082-0.2448979592-0.06122448980-0.0612244898-0.2448979592-0.5510204082-0.9795918367-1.5306122449-2.2040816327-3-3.9183673469-4.9591836735-6.1224489796-7.4081632653-8.8163265306-10.3469387755-12-13.7755102041-15.6734693878-17.693877551-19.8367346939-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20-20

Horizontal Angle - DegreesGain - dB

Sheet1-180-20-175-20-170-20-165-20-160-20-155-20-150-20-145-20-140-20-135-20-130-20-125-20-120-20-115-20-110-20-105-20-100-20-95-20-90-19.8367346939-85-17.693877551-80-15.6734693878-75-13.7755102041-70-12-65-10.3469387755-60-8.8163265306-55-7.4081632653-50-6.1224489796-45-4.9591836735-40-3.9183673469-35-3-30-2.2040816327-25-1.5306122449-20-0.9795918367-15-0.5510204082-10-0.2448979592-5-0.0612244898005-0.061224489810-0.244897959215-0.551020408220-0.979591836725-1.530612244930-2.204081632735-340-3.918367346945-4.959183673550-6.122448979655-7.408163265360-8.816326530665-10.346938775570-1275-13.775510204180-15.673469387885-17.69387755190-19.836734693995-20100-20105-20110-20115-20120-20125-20130-20135-20140-20145-20150-20155-20160-20165-20170-20175-20180-20

Sheet10000000000000000000000000000000000000000000000000000000000000000000000000

Horizontal Angle - DegreesGain - dB

Sheet2

Sheet3