ANNEX 5: TRANSPORT AND TRAFFIC TELEMATICS (TTT)

Scope of annex
This annex covers frequency bands and regulatory as well as informative parameters recommended for radio systems used in the field of transport and traffic telematics (road, rail and water depending on the relevant technical restrictions), traffic management, navigation and mobility management. Typical applications are used for interfaces between different modes of transport, communication between vehicles (e.g. car-to-car), between vehicles and fixed locations (e.g. car-to-infrastructure), communication from and to users as well as radar system installations. Automotive radar is defined as a moving radar device supporting functions of the vehicle. Entry f2) is limited to obstacle detection radars for rotorcraft use.

Frequency Band Power / Magnetic Field Spectrum access and mitigation requirements Modulation / maximum occupied bandwidth ECC/ERC Deliverable Notes
a 5795MHz  -  5805MHz
2 W e.i.r.p. / 8 W e.i.r.p. No requirement Individual license may be required for the higher power of 8 W systems
b 5805MHz  -  5815MHz
2 W e.i.r.p. / 8 W e.i.r.p. No requirement Individual license may be required
c1 21.65GHz  -  26.65GHz
* * * ECC/DEC/(04)10 For automotive Short Range Radars (SRR). * See detailed requirements in related ECC Decision. New SRR equipment shall not be placed onto the market as of 1 July 2013
d1 24.05GHz  -  24.075GHz
100 mW e.i.r.p. No requirement For automotive radars
d4 24.075GHz  -  24.15GHz
100 mW e.i.r.p. ≤ 1ms/40 kHz dwell time every 40ms For automotive radars (road vehicles only). The spectrum access and mitigation requirement is given for devices mounted either behind a bumper or mounted without a bumper. A requirement for minimum frequency modulation range (applicable to FMCW or step frequency signals) or minimum instantaneous bandwidth (applicable to pulsed signal) of 250 kHz applies in addition to the requirement on maximum dwell time
d3 24.075GHz  -  24.15GHz
100 mW e.i.r.p. ≤ 4µs/40 kHz dwell time every 3ms For automotive radars (road vehicles only). The spectrum access and mitigation requirement is given for devices mounted behind a bumper. If mounted without a bumper, the requirement should be 3µs/40kHz maximum dwell time every 3ms. A requirement for minimum frequency modulation range (applicable to FMCW or step frequency signals) or minimum instantaneous bandwidth (applicable to pulsed signal) of 250 kHz applies in addition to the requirement on maximum dwell time
d2 24.075GHz  -  24.15GHz
0.1 mW e.i.r.p. No requirement For automotive radars
d5 24.15GHz  -  24.25GHz
100 mW e.i.r.p. No requirement For automotive radars (road vehicles only)
e1 24.25GHz  -  24.495GHz
-11 dBm e.i.r.p. ≤ 0.25%/s/25 MHz duty cycle For automotive radars. The activity of the Wideband Low Activity Mode (WLAM) is limited to avoid the risk of interference and this mode is only activated in specific configurations as a complementary to designation d1 to d5 as described in ECC Report 164
e2 24.25GHz  -  24.5GHz
+20 dBm e.i.r.p. / +16 dBm e.i.r.p. ≤ 5.6%/s/25 MHz duty cycle / ≤ 2.3%/s/25 MHz duty cycle For automotive radars. The activity of the Wideband Low Activity Mode (WLAM) is limited to avoid the risk of interference and this mode is only activated in specific configurations as a complementary to designation d1 to d5 as described in ECC Report 164
c2 24.25GHz  -  26.65GHz
* * * ECC/DEC/(04)10 For automotive Short Range Radars (SRR). See detailed requirements in related ECC Decision. SRR equipment may only be placed onto the market until 1 January 2018. This date is extended by 4 years for SRR equipment mounted on motor vehicles for which vehicle conformity compliance has been granted before 1 January 2018
e3 24.495GHz  -  24.5GHz
-8 dBm e.i.r.p. ≤ 1.5%/s/5 MHz duty cycle For automotive radars. The activity of the Wideband Low Activity Mode (WLAM) is limited to avoid the risk of interference and this mode is only activated in specific configurations as a complementary to designation d1 to d5 as described in ECC Report 164
f2 76GHz  -  77GHz
* * * ECC/DEC/(16)01 For obstacle detection radars for rotorcraft use. Use is not possible in specific areas of some European countries due to exclusion zones implementation around RAS observatories. * See detailed requirements in related ECC Decision
f1 76GHz  -  77GHz
55 dBm peak e.i.r.p. (note 1) Not specified ECC Report 262 50 dBm average power or 23.5 dBm average power for pulse radar only. For ground based vehicle and infrastructure systems only. The frequency band is also included in Annex 4

Note 1 Fixed transportation infrastructure radars have to be of a scanning nature in order to limit the illumination time and ensure a minimum silent time to achieve coexistence with automotive radar systems.

Additional Information

Harmonised Standards
EN 300 674 sub-bands a), b) EN 301 091 sub-band f1) EN 302 288 sub-bands c1), c2) EN 302 858 sub-bands d1) to d5) and e1) to e3) EN 303 360 sub-band f2)

Technical parameters also referred to in the harmonised standard
No information

Frequency issues
Sub-bands d1) to d5) as well as c1), c2): Note that the regulation in the bands d1) to d5) for the band 24.05-24.25 GHz for automotive radars is without any plans for a time limit within CEPT (see document ECC(15)058). Only the bands c1), c2) for Short Range Radar (SRR) are time limited.