There is no special interference source except TV signal. Use the similar TV Channel frequencies all over the world - Security features: required - Reliability: high - Device category: as regulations applied to all applications Intelligent Transportation System TV make signal travel longer distance and less vulnerable in rural areas, which can enable multiple applications between car and fixed node. Information delivery Traffic management Logistics tracking/Vehicle location Environment: Outdoor Data rate: Generally <1Mbps, Up to 10Mbps Operating range: One controller covers up to 1 square km Data flow: two-way, 100 end devices (mobile) to 1 controller (fixed) Transmission Obey regulations all over the world Power type: Mains powered or powered by car engine 15-11-0194-00 15-11-0279-01 Surveillance, control and monitoring network Larger coverage areas due to excellent propagation characteristics, which make it attractive for surveillance, control and monitoring networks - Environment: Indoor/outdoor - Data rate: up to 2Mbps - Operating range: up to 1 Km - Mobility: support (e.g., up to 10Km/h) 15-11-0215-02 Infrastructure moditoring network Larger coverage areas due to excellent propagation characteristics, which make it attractive for infrastructure monitoring - Environment: outdoor - Data rate: less than 100Kbps - Operating range: up to several Km - Reliability: high - Mobility: fixed - Energy efficiency: high 15-11-0215-02 Local network in (M2M) Larger coverage areas due to excellent propagation characteristics, which make it attractive for local networks in M2M - Environment: Indoor/outdoor - Data rate: depends on M2M applications (40Kbps~2Mbps) - Operating range: depends on M2M applications (up to several Km) - Mobility: depends on M2M applications (up to 20~30Km/h) 15-11-0215-02 Digital Signage System Larger coverage areas due to excellent propagation characteristics, which make it attractive for the proposed system - Environment: Indoor/outdoor - Data rate: typical, up to 10Mbps - Operating range: up to several Km - Mobility: fixed - Frame rate: ≥15fps - Power type: mains powered 15-12-0060-00 White Space Related Regulations Summary of Regulations Region TVWS Device Type Transmitted GDB * Sensing
terms of shadowing, number of reflected paths etc. It has turned out that the signal strength variations are quite well described by a lognormal distribution. Hence, Lexcess provides the mean excess path loss in dB while σL is the standard deviation of the normal distributed signal strength in dB, known as the location variability. In fact, σL depends on the frequency and the environment. σL is modelled according to with SE = 5.2 for urban and SE = 6.6 for suburban environments, respectively. Since the TG4m systems are supposed to be fixed located, this equation will in fact not be exercised. Modified Hata Model for Propagation Prediction Used for ERC Report 68 The modified Hata model adopted in ERC Report 68 is available for outdoor-outdoor path loss calculations. The total path loss is where: L = median propagation loss (in dB) f = frequency (in MHz) h1 = antenna height of the transmitter antenna (in m) h2 = antenna height of the receiver antenna (in m) Hm = min{} Hb = max{} d = distance (in km), preferably less than 100 km. env = parameter for the environments of the transmitter and receiver: (outdoor/indoor), (rural, urban or suburban), (propagation above or below roof) If Hm and/or Hb are below 1 m, a value of 1 m should be used instead. Antenna heights above 200 m might also lead to significant errors. Propagation below roof means that both Hm and Hb are below the height of roofs. Propagation is above roof in other cases (Hb is above the height of roofs). Calculation of the median path loss L Case 1: d ≤ 0.04 km The median path loss L is Case 2: d ≥ 0.1 km Let a(Hm), a(Hm),and α be defined and the median path loss L is equated for each case of urban, suburban and open areas as defined in three subcases in the below.