STG WS(13)09 Basic example - Real Case
advertisement
Basic examples of setting simulations: A REAL CASE European Communications Office Stella Lyubchenko 11-12 June 2013 EUROPEAN COMMUNICATIONS OFFICE Nansensgade 19 DK-1366 Copenhagen Denmark Telephone: Telefax: + 45 33 89 63 00 + 45 33 89 63 30 E-mail: eco@eco.cept.org Web Site: http://www.cept.org/eco Illustration of coverage and simulation radius in SEAMCAT dRSS Wanted Receiver dRSS Victim Receiver Coverage radius Victim link Victim Link Transmitter (VLT) (Origin of victim coverage) iRSS Victim Link Receiver (VLR) (Origin of simulation) Simulation radius SEAMCAT Workshop Coverage Interfering radius Link Receiver (ILR) Page 2 Interfering Link Transmitter (ILT) (Origin of interfering coverage) Interfering link Distance between the ILT and the VLR (simulation radius) • In this case Victim Link and Interfering Link operate at 1000 MHz, therefore simulation radius is define as follows: SEAMCAT Workshop Page 3 Distance between the ILT and the VLR (simulation radius) • The It is located between 1 km and 10 km; • iRSS unwanted = Pe + Ge + Gr – L; • In this example if It located between 1 km and 10 km then iRSS unwanted will be in the range between -59.5 dBm and -39.5 dBm SEAMCAT Workshop Page 4 Victim Link Transmitter (VLT) (coverage radius) Wanted Signal wt ndensmax. Rmax 2 nchannels.nuserperchannel clusterfrequency wt Rmax Wanted Signal Wanted gnal f25…f32 f49…f56 f9…f16 b i le ra d i o , in a c a l l & rio u s in v ic t im rx d w id t h w it h l o we s t pinl inag clo a lsls& f1…f8 c t im rx h l o we s t d w id t h w it h l o we s t p l in g lo s s f57…f64 f17…f24 e ra d i o , in a c a l l & u s in v ic t im rx l& id t h w it h l o we s t n g lo s s st Fre que f65…f72 f33…f40 b i le ra d i o , in a c a l l & rio u s in v ic t im rx f9…f16 f41…f48 nc y f1…f8 c lu ste ro SEAMCAT Workshop f17…f24 f9 Page 5 nchannels nuserperchannel dens max cluster frequency wt Rmax 1.42km - User-defined radius; - Noise-limited network; - Trafic-limited network VLT - coverage radius The dRSS for a receiver located at the edge of the coverage area is calculated in the wt 1.42km when dRSS = -47.5 dBm following way: dRSS=Pe+Ge+Gr-L if Rmax SEAMCAT Workshop Page 6 Calculation of simulation radius (Uniform density mode) Within the simulation radius following number of active transmitters can be located uniformly: nactivedenstransmitter.probtransmission. Rsimulation 2 For a single It Rsimulation nactive densitactive.probtransmission Rsimulation 0.178km iRSS Unwanted = - 24.5 dBm For 10 active It Rsimulation 0.564km iRSS Unwanted = - 34.5 dBm SEAMCAT Workshop Page 7 Calculation of simulation radius (”none” mode) In the “none” mode it is also possible to define Uniform density of transmitters by using the Uniform polar distance For the single transmitter with Rsimulation = 0.178 km iRSS Unwanted = - 24.5 dBm SEAMCAT Workshop Page 8 Protection distance n active Rsimulation d02 active densit probtransmission SEAMCAT Workshop Calculations of iRSS Unwanted will be done only if location of It satisfied to the following condition: Page 9 d itvr d 0 Power control • Victim Link and Interfering operate at 1000 MHz. • Distance between the Victim and Interfering transmitter is 1 km. SEAMCAT Workshop Page 10 Power control • if power control is not activated then: iRSS Unwanted= 33(dBm)+11+9-(32.5+10log(1)+20log(1000)) = -39.5dBm SEAMCAT Workshop Page 11 Power control dRSS Wanted Receiver= 33(dBm)+11+11-(32.5+10log(1)+20log(1000)) = -37.5dBm 1 SEAMCAT Workshop Page 12 P Pthreshold Power control 2 -50dBm (threshold) + 3 · Step (5dB) > –37.5dBm > -50dBm (threshold) + 2 · Step (5dB) The gain of Power control (git PC) = 10 dB then iRSSunwanted = -39.5dBm – git PC = -49.5 dBm SEAMCAT Workshop Page 13 Power control 3 –37.5dBm > -70dB (threshold) + 20 (dynamic range) iRSS Unwanted = -39.5dBm – git PC = -59.5dBm SEAMCAT Workshop Page 14 Multiple Interferers generation (Option 1) Add Duplicate Delete Colocation of the interferers SEAMCAT Workshop Page 15 Multiple Interferers generation (Option 2) SEAMCAT Workshop Generate Multiple interfering link Page 16 Multiple Interferers generation (Option 3) SEAMCAT Workshop Page 17 Thank you - Any Questions? SEAMCAT Workshop Stella Lyubchenko / ECO Page 18 Examples from ECC Reports 185 and 201 SEAMCAT Workshop Page 19 Calculations in 2483.5 – 2500 MHz band between healthcare facility MBANS (VLR) and LTE UL (ILT) SEAMCAT Workshop Page 20 Calculations in 2483.5 – 2500 MHz band between healthcare facility MBANS (VLR) and LTE UL (ILT) Victim characteristics Units MBANS Receiver bandwidth MHz 3 Receiver noise figure dB 10 Receiver antenna height m 1.5 Receiver antenna gain dBi 0 Operating frequency MHz 2498.5 N, receiver thermal noise dBm -109.1 ACS dB 25 Noise Floor dBm -99.1 I/N objective dB 0 e.i.r.p dBm 23 Bandwidth MHz 10 ACLR dB -30 Wall attenuation dB 0 Antenna height m 1.5 Minimum path loss dB 87.25 Interferer’s characteristics LTE UL See workspace SEAMCAT Workshop Page 21 Positioning between MBANS (VLR) and LTE UL (ILT) • Postioning: – Interfering Tx fixed with respect to the victim receiver – No protection distance • Propagation model – Free space, no variation • Result: – Distance of ILT to VLR derived when P_interference = 0.1 % SEAMCAT Workshop Page 22 Calculation with SEAMCAT on some examples of interference assessment for broadcasting service SEAMCAT Workshop Page 23 Adjacent channel simulations (scenario outline) Size of broadcast pixel 100 m x 100 m Operating frequency for WSD (IT) 600 MHz DTT receiver (VR) 608, 616, 624 MHz DTT receive antenna height 10 m DTT receiver antenna gain 0 dBi WSD antenna height 10 m WSD E.I.R.P 20 dBm Emed at coverage edge 56.21 dBµV/m P = -76.55 dBm, σ=5.5 dB SEAMCAT Workshop Propagation model Page 24 Extended Hata, rural Adjacent channel simulations (SEAMCAT Victim link) SEAMCAT Workshop Page 25 Adjacent channel simulations (example of results) Interferer frequency Victim frequency R (distance between Vr and interferer) 600 MHz 608 MHz 0.02 km 97.37% 600 MHz 616 MHz 0.02 km 67.42% 600 MHz 624 MHz 0.02 km 19.54 % SEAMCAT Workshop Page 26 IP, %