Commission Implementing Regulation (EU) 2016/799Show full title

5.3.2 Downlink and uplink parameters U.K.

DSC_28 The equipment used for remote tachograph monitoring shall conform to and operate within ERC70-03 and the parameters defined in Tables 14.1 and 14.2 below. U.K.

DSC_29 Further, to ensure compatibility with the operational parameters of other standardised 5.8 GHz DSRC systems, the equipment used for remote tachograph monitoring shall conform to parameters from EN 12253 and EN 13372. U.K.

Namely:

Table 14.1

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: 5,7975 GHz 5,8025 GHz 5,8075 GHz 5,8125 GHz	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: – 43 dBm (boresight) – 41 dBm (within – 45° ± 45°Corresponding to the plane parallel to the road surface when the DSRC-VU later is installed in the vehicle (Azimuth))	(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)

Table 14.2

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: U4a-0: – 14 dBm U4a-1: – 21 dBm	According to declared and published specification of equipment designer
U4b a	Maximum Single Side Band E.I.R.P. (35°)	Two options: Not applicable – 17dBm	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)