The 98th meeting of SE24 took place on 16 – 18 September 2019 in Cluj Napoca (Romania) and was attended by about 50 delegates from administrations, industry and observers. The main outcomes of the meeting are summarised below.
SE24_60: Wireless Power Transmission systems
SE24 extensively discussed and reviewed technical details and requirements for WPT applications to be considered in the draft ECC Report, also addressing the vast range of WPT medical applications.
SE24 tasked the rapporteur to revise the material in the draft ECC Report to check if the content is in line with the agreed WPT requirements to highlight any discrepancy and invite possible updates. The outcome of this review will be discussed in a dedicated webmeeting next 12 December (10:00-12:00).
SE24 agreed to propose WG SE an extension of this work item till January 2021.
SE24_61: Additional studies on NBN SRDs operating in the band 915-921 MHz
SE24 reviewed the draft ECC Report, based on the received inputs.
SE24 considered a LS from SE21 on how to model the aggregate effect of spurious emissions. Based on the discussion, SE24 invited contributions to consider pessimistic analysis based on limits in ERC/REC 74-01 as well as to conduct studies based on measurements of typical SRD unwanted emission levels.
SE24_63: Updated UWB regulatory framework
SE24 received an LS from ETSI TC ERM highlighting the 6-10.6 GHz range as the priority frequency interval for this work item. Studies should focus mainly on fixed outdoor deployment of UWB and vehicular usage (low duty cycle mitigation) in the band above 6 GHz. In addition, detailed analyses of the indoor usage with higher power levels up to at least -31.3 dBm/MHz should be considered. Indications on the mitigation techniques, such as duty cycle restrictions or deployment limitations, were also provided.
Based on the information received from ETSI, SE24 started considering studies on coexistence with the fixed service in the 6 GHz range and updated the draft ECC Report. SE24 also noted the remarks from ETSI on the schedule of future updates of the UWB decisions in Europe and agreed to propose WG SE an extension of this work item until May 2021.
SE24_67 (LPWAN UNB new channel access options) & SE24_68 (Wideband data transmission systems in 863-868 MHz)
SE24 noted that WG SE agreed to close these work items in absence of contributions since they´ve been first activated.
SE24_69: Coexistence between SRD applications and SRD in data networks
SE24 noted the update and clarification of the scope of the work item from last WG SE. WG SE also provided guidance highlighting that compatibility between SRD and railway systems should be addressed within SE7. Studies in SE7 and SE24 should use the same set of parameters for the same kind of SRD devices. In this respect, SE24 provided a reply LS to SE7 with technical characteristics of SRD systems in adjacent bands to be considered in the studies on railway mobile radio (RMR) at 900 MHz.
Based on the received contributions, SE24 developed a working document towards the draft ECC Report.
SE24 noted the information from ETSI on the development of an SRdoc for NBN systems and agreed to propose WG SE a reply LS to ETSI TC ERM asking additional technical information necessary in the context of the ongoing/new CEPT studies. SE24 also agreed to propose to WG SE an extension of the deadline for this work item to September 2020, to align it with the timeline for work item SE24_69.
SE24_70: HD-GBSAR within 74 - 81 GHz
SE24 updated the draft ECC Report considering in particular studies on radio astronomy and fixed service. It was also highlighted that studies on corner side radars for automotive applications are needed in addition to those on front radars. The draft ECC Report will be further developed by correspondence in a dedicated webmeeting on 4 December 2019 (15:00-17:00).
SE24_71: UWB radiodetermination applications in the range 116 - 260 GHz
SE24 noted that WG SE agreed to extend the lower edge of the frequency range considered under this work item from 120 GHz to 116 GHz.
Numerous inputs were submitted to the meeting, providing elements for the draft ECC Report. Due to lack of time, SE24 agreed to include this new material in the draft ECC Report by correspondence and discuss it in a dedicated webmeeting on 7 October (15:00-17:00).
A question was raised regarding the potential consideration of interfering signals with duty cycles in the studies, as the impact of such kind of signals is currently unknown, especially on victim receivers with long integration times like radio astronomy. This was noted and a will be further clarified in due time.
SE24 liaised with SE19 asking clarification on parameters and deployments for the fixed service in the frequency bands 116-260 GHz.
Potential new work items
SE24 considered the information received from ETSI in relation to new studies on spectrum needs of NBN systems related to on-going studies for spectrum outside of the RFID interrogator channels in the band 915-919.4 MHz. SE24 will propose WG SE to include this in the scope of work item SE24_69.
