LPLT BROADCAST NETWORKS WITH FREQUENCY REUSE 1

Transcription

1 LPLT BROADCAST NETWORKS WITH FREQUENCY REUSE 1 SFN/MFN Interference analysis for Fixed and Mobile reception European Commission Oct

2 CONTENT Background and Objectives Analysis of the different configurations studied Conclusion Q&A European Commission Oct Slide 2/12

3 BACKGROUND AND OBJECTIVES (1/2) Future use of the MHz Mobile reception of audiovisual content and services Low Power Low Tower (LPLT) network operating as a nationwide Single Frequency Network (SFN) + Regional SFN for Regional content Coverage achieved at the border between two SFNs Reuse existing base stations 2 bps/hz to mobile devices and fixed rooftop antennas Evolution of the current LTE embms standard with longer cyclic prefixes (200 µsec) European Commission Oct Slide 3/12

4 BACKGROUND AND OBJECTIVES (2/2) Extension of a former BBC study Reuse the BBC site selection Adopt realistic LTE receiver characteristics Coverage analysis under various receiving modes Optimization phase to match the border of administrative broadcasting region All planning assumptions are detailed in the study report European Commission Oct Slide 4/12

5 AREA AND NETWORK Network Selected by BBC Definition of SFNs European Commission Oct Slide 5/12

6 CONFIGURATION 1 Planning assumption Transition phase for fixed reception Configuration 1 Base stations Omnidirectional in H plane and vertical pattern according to ITU-R 1336 Terminal Fixed antenna according to ITU-BT m AGL oriented towards the center of SFN 4 European Commission Oct Slide 6/12

7 CONFIGURATION 1 Results Combination of all SFNs: 88.42% coverage 11.58% interference (Geographic %) European Commission Oct Slide 7/12

8 CONFIGURATION 2 Planning assumption Reference configuration with receiving antennas oriented towards the server providing the best SNIR Configuration 2 Base stations Omnidirectional in H plane and vertical pattern according to ITU-R 1336 Terminal Fixed antenna according to ITU-BT m AGL European Commission Oct Slide 8/12

9 CONFIGURATION 2 Results Combination of all SFNs: 99.62% coverage 0.38% interference (Geographic %) European Commission Oct Slide 9/12

10 CONFIGURATION 3 Planning assumption Coverage improvement with a High Performance receiving antenna Configuration 3 Base stations Omnidirectional in H plane and vertical pattern according to ITU-R 1336 Terminal Advanced fixed antenna from Qualcomm 10m AGL European Commission Oct Slide 10/12

11 CONFIGURATION 3 Results Combination of all SFNs: 99.9% coverage 0.1% interference (Geographic %) European Commission Oct Slide 11/12

12 CONFIGURATION 4 Planning assumption Mobile reception from non-optimized network Configuration 4 Base stations Omnidirectional in H plane and vertical pattern according to ITU-R 1336 Terminal Mobile omni antenna 1.5m AGL European Commission Oct Slide 12/12

13 CONFIGURATION 4 Results No Specific optimization Combination of all SFNs: 75.55% coverage 24.45% interference (Geographic %) European Commission Oct Slide 13/12

14 CONFIGURATION 5 Planning assumption Local optimization phase in order to match the border of administrative broadcasting region Use of sectorized antennas (120 or 180 aperture) A new site is added Configuration 5 Base stations Omnidirectional in H plane and vertical pattern according to ITU-R Optimized configuration V2 Terminal Advanced fixed antenna from Qualcomm 10m AGL European Commission Oct Slide 14/12

15 CONFIGURATION 5 Results 95.66% coverage 97.27% coverage European Commission Oct Slide 15/12

16 CONCLUSION Combined coverage (% of geographical area) Interference (% of geographical area) Fixed antenna ITU-BT.419 oriented towards the center of SFN (Configuration 1) Re-oriented fixed antenna ITU-BT.419 (Configuration 2) Advanced fixed antenna (Configuration 3) European Commission Oct Slide 16/12

17 CONCLUSION Analysis of LPLT broadcast networks based on existing mobile sites Fixed rooftop reception Antennas need repointing in 10% of geographical area Antennas need upgrading in <1% of geographical area Indoor (10dB) Mobile reception without any network optimization Reception in 75.55% geographical area Mobile coverage not possible at SFN border Matching SFN coverage with broadcast area requires local network optimization High Performance Antennas desirable European Commission Oct Slide 17/12

18 Contact: Tel Spectrum Management Spectrum optimization Spectrum sharing Consulting Audit Software IT integration OFCOM - Wednesday 9 April /11

19 AREA AND NETWORK Network Selected by BBC is a selection of O2 900 MHz BSs European Commission Oct Slide 19/12

20 AREA AND NETWORK Advanced Yagi Antennas Designed/Simulated by Qualcomm Dual Polarisation Single Polarisation 145x65x65 cm 182x53x53 cm European Commission Oct Slide 20/12