Existing mitigation techniques TPC and/or LDC Additional mitigation technique Trigger-before-talk (see 2.1.2) typ. 10 ms or less, max. 50 ms LDC requirements (see ETSI EN 302 065-3 [10], Cumulative Ton-time (per vehicle device) clause 4.5.3) will be kept in any case: during bidirectional UWB communication (1 Ton max < 5 ms trigger) Toff mean < 38 ms (averaged over 1 s) > 950 ms per second ∑Toff Mitigation factors Mitigation factors for Category A UWB device communication for proximity verification: Trigger-before-talk: UWB transmission is only initiated when necessary, in particular if the system indicates that UWB devices are in range; Wake-up mechanism for polling is not UWB; Only the physical proximity of a key triggers UWB communication. Very low activity factor (typ. < 0.00035%): Low duty-cycle for the communication due to short packages (small amount of data for command, authentication and/or status transfer); profile of functions is low. Once UWB communication is established, TPC can be used as additional mitigation. Low risk of aggregate transmissions (uncoordinated networks, ad-hoc communication): Door openings are uncoordinated events. Even in parking lots, door openings are single and sporadic events. B Category B UWB devices are UWB devices used for proximity monitoring. The core characteristic of these devices is that UWB transmissions are triggered by the system following a user event as in Category A and the communication is repeated for a limited time to check for the user's presence or exact location. Technical parameters Table 2: Technical parameters for Category B UWB devices System Parameter Signal Type Wide Band (UWB) Frequency Range 3.4 GHz to 4.8 GHz and/or 6 GHz to 8.5 GHz -41.3 dBm/MHz (Max) Transmit (e.i.r.p.) 0 dBm/50 MHz (Max) without exterior limit Operational Bandwidth System dependent, typ. > 500 MHz Data Rates System dependent
Existing mitigation techniques TPC and/or LDC Additional mitigation technique Trigger-before-talk (see 2.1.2) Cumulative Ton-time (per vehicle device) during bidirectional UWB communication (1 trigger) typ. 10 ms or less, max. 50 ms LDC requirements (see ETSI EN 302 065-3 [10], clause 4.5.3) will be kept in any case: Ton max < 5 ms Toff mean < 38 ms (averaged over 1 s) ∑Toff > 950 ms per second Mitigation factors Mitigation factors for Category A UWB device communication for proximity verification: Trigger-before-talk: UWB transmission is only initiated when necessary, in particular if the system indicates that UWB devices are in range; Wake-up mechanism for polling is not UWB; Only the physical proximity of a key triggers UWB communication. Very low activity factor (typ. < 0.00035%): Low duty-cycle for the communication due to short packages (small amount of data for command, authentication and/or status transfer); profile of functions is low. Once UWB communication is established, TPC can be used as additional mitigation. Low risk of aggregate transmissions (uncoordinated networks, ad-hoc communication): Door openings are uncoordinated events. Even in parking lots, door openings are single and sporadic events. B Category B UWB devices are UWB devices used for proximity monitoring. The core characteristic of these devices is that UWB transmissions are triggered by the system following a user event as in Category A and the communication is repeated for a limited time to check for the user's presence or exact location. Technical parameters Table 2: Technical parameters for Category B UWB devices System Parameter Signal Type Wide Band (UWB) Frequency Range 3.4 GHz to 4.8 GHz and/or 6 GHz to 8.5 GHz Transmit (e.i.r.p.) -41.3 dBm/MHz (Max) 0 dBm/50 MHz (Max) without exterior limit Operational Bandwidth System dependent, typ. > 500 MHz Data Rates System dependent
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