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Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance)
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Namely:
Downlink parameters
a – Downlink parameters subject to conformance testing in accordance with relevant parameter test from EN 300 674-1. | |||
Item No | Parameter | Value(s) | Remark |
---|---|---|---|
D1 | Downlink Carrier Frequencies | There are four alternatives which may be used by an REDCR:
| Within ERC 70-03. Carrier Frequencies may be selected by the implementer of the roadside system and need not be known in the DSRC-VU (Consistent with EN 12253, EN 13372) |
D1a a | Tolerance of Carrier Frequencies | within ± 5 ppm | (Consistent with EN 12253) |
D2 a | RSU (REDCR) Transmitter Spectrum Mask | Within ERC 70-03. REDCR shall be according to Class B,C as defined in EN 12253. No other specific requirement within this Annex | Parameter used for controlling interference between interrogators in proximity (as defined in EN 12253 and EN 13372). |
D3 | OBU(DSRC-VU) Minimum Frequency Range | 5,795 — 5,815 GHz | (Consistent with EN 12253) |
D4 a | Maximum E.I.R.P. | Within ERC 70-03 (unlicensed) and within National Regulation Maximum + 33 dBm | (Consistent with EN 12253) |
D4a | Angular E.I.R.P. mask | According to declared and published specification of interrogator designer | (Consistent with EN 12253) |
D5 | Polarisation | Left hand circular | (Consistent with EN 12253) |
D5a | Cross-Polarisation | XPD: In bore sight: (REDCR) RSU t ≥ 15 dB (DSRC-VU) OBU r ≥ 10 dB At -3 dB area: (REDCR) RSU t ≥ 10 dB (DSRC-VU) OBU r ≥ 6 dB | (Consistent with EN 12253) |
D6 a | Modulation | Two level amplitude modulation. | (Consistent with EN 12253) |
D6a a | Modulation Index | 0,5 ... 0,9 | (Consistent with EN 12253) |
D6b | Eye Pattern | ≥ 90 % (time) / ≥ 85 % (amplitude) | |
D7 a | Data Coding | FM0 ‘1’ bit has transitions only at the beginning and end of the bit interval. ‘0’ bit has an additional transition in the middle of the bit interval compared to the ‘1’ bit. | (Consistent with EN 12253) |
D8 a | Bit rate | 500 kBit/s | (Consistent with EN 12253) |
D8a | Tolerance of Bit Clock | better than ± 100 ppm | (Consistent with EN 12253) |
D9 a | Bit Error Rate (B.E.R.) for communication | ≤ 10– 6 when incident power at OBU (DSRC-VU) is in the range given by [D11a to D11b]. | (Consistent with EN 12253) |
D10 | Wake-up trigger for OBU (DSRC-VU) | OBU (DSRC-VU) shall wake up on receiving any frame with 11 or more octets (including preamble) | No special wake-up pattern is necessary. DSRC-VU may wake up on receiving a frame with less than 11 octets (Consistent with EN 12253) |
D10a | Maximum Start Time | ≤ 5 ms | (Consistent with EN 12253) |
D11 | Communication zone | Spatial region within which a B.E.R. according to D9a is achieved | (Consistent with EN 12253) |
D11a a | Power Limit for communication (upper). | – 24dBm | (Consistent with EN 12253) |
D11b a | Power Limit for communication (lower). | Incident power:
| (Consistent with EN 12253) Extended requirement for horizontal angles up to ±45°, due to the use cases defined in this annex. |
D12 a | Cut-off power level of (DSRC-VU) | – 60 dBm | (Consistent with EN 12253) |
D13 | Preamble | Preamble is mandatory. | (Consistent with EN 12253) |
D13a | Preamble Length and Pattern | 16 bits ± 1 bit of FM0 coded ‘1’ bits | (Consistent with EN 12253) |
D13b | Preamble Wave form | An alternating sequence of low level and high level with pulse duration of 2 μs. The tolerance is given byD8a | (Consistent with EN 12253) |
D13c | Trailing Bits | The RSU (REDCR) is permitted to transmit a maximum of 8 bits after the end flag. An OBU (DSRC-VU) is not required to take these additional bits into account. | (Consistent with EN 12253) |
Uplink parameters
a – Uplink parameters subject to conformance testing in accordance with relevant parameter test from EN 300 674-1 | |||
Item No. | Parameter | Value(s) | Remark |
---|---|---|---|
U1 a | Sub-carrier Frequencies | A OBU (DSRC-VU) shall support 1,5 MHz and 2,0 MHz An RSU (REDCR) shall support 1,5 MHz or 2,0 MHz or both. U1-0: 1,5 MHz U1-1: 2,0 MHz | Selection of sub-carrier frequency (1,5 MHz or 2,0 MHz) depends on the EN 13372 profile selected. |
U1a a | Tolerance of Sub- carrier Frequencies | within ± 0,1 % | (Consistent with EN 12253) |
U1b | Use of Side Bands | Same data on both sides | (Consistent with EN 12253) |
U2 a | OBU (DSRC-VU) Transmitter Spectrum Mask | According to EN12253 1) Out band power: see ETSI EN 300674-1 2) In band power: [U4a] dBm in 500 kHz 3) Emission in any other uplink channel: U2(3)-1 = – 35 dBm in 500 kHz | (Consistent with EN 12253) |
U4a a | Maximum Single Side Band E.I.R.P. (boresight) | Two options:
| According to declared and published specification of equipment designer |
U4b a | Maximum Single Side Band E.I.R.P. (35°) | Two options:
| According to declared and published specification of equipment designer |
U5 | Polarisation | Left hand circular | (Consistent with EN 12253) |
U5a | Cross Polarisation | XPD: In bore sight: (REDCR) RSU r ≥ 15 dB (DSRC-VU) OBU t ≥ 10 dB At – 3 dB: (REDCR) RSU r ≥ 10 dB (DSRC-VU) OBU t ≥ 6 dB | (Consistent with EN 12253) |
U6 | Sub-Carrier Modulation | 2-PSK Encoded data synchronised with sub-carrier: Transitions of encoded data coincide with transitions of sub- carrier. | (Consistent with EN 12253) |
U6b | Duty Cycle | Duty Cycle: 50 % ± α, α ≤ 5 % | (Consistent with EN 12253) |
U6c | Modulation on Carrier | Multiplication of modulated sub- carrier with carrier. | (Consistent with EN 12253) |
U7 a | Data Coding | NRZI (No transition at beginning of ‘1’ bit, transition at beginning of ‘0’ bit, no transition within bit) | (Consistent with EN 12253) |
U8 a | Bit Rate | 250 kbit/s | (Consistent with EN 12253) |
U8a | Tolerance of Bit Clock | Within ± 1 000 ppm | (Consistent with EN 12253) |
U9 | Bit Error Rate (B.E.R.) for communication | ≤10– 6 | (Consistent with EN 12253) |
U11 | Communication Zone | The spatial region within which the DSRC-VU is situated such that its transmissions are received by the REDCR with a B.E.R. of less than that given by U9a. | (Consistent with EN 12253) |
U12a a | Conversion Gain (lower limit) | 1 dB for each side band Range of angle: Circularly symmetric between bore sight and ± 35° and | |
within – 45° ± 45° Corresponding to the plane parallel to the road surface when the DSRC-VU later is installed in the vehicle (Azimuth) | Greater that the specified value range for horizontal angles up to ± 45°, due to the use cases defined in this annex. | ||
U12b a | Conversion Gain (upper limit) | 10 dB for each side band | Less than the specified value range for each side band within a circular cone around boresight of ± 45° opening angle |
U13 | Preamble | Preamble is mandatory. | (Consistent with EN 12253) |
U13a | Preamble Length and Pattern | 32 to 36 μs modulated with sub- carrier only, then 8 bits of NRZI coded ‘0’ bits. | (Consistent with EN 12253) |
U13b | Trailing Bits | The DSRC-VU is permitted to transmit a maximum of 8 bits after the end flag. A RSU (REDCR) is not required to take these additional bits into account. | (Consistent with EN 12253) |
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