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SE 24 - Short Range Devices

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Overview of the 66th meeting of SE24

04 Sep 2012, 13:46

SE24 had its 66th meeting on 27-28 August 2012 in Montegrotto, Italy. The activities are summarized below

RFID at13.56 MHz: on the basis of measurements performed by BNetzA, SE24 assessed the potential impact of the new spectrum mask for RFID proposed in ETSI TR 103059. The following conclusions are submitted to WG SE for endorsement:

  • The extension of the wideband emissions is expected not to cause harmful interference because of the low protection distance.
  •  The modulation level increase near the carrier is unlikely to cause interference because of the low probability and limited implementation level as compared to the high volume NFC, e-Pass and Smart Card applications of the new 13.56 MHz RFID equipment. 
  • In summary, SE24 is not expecting, that the changed spectrum mask is causing harmful interference in real  life scenarios.

 

Airborne UWB (SE24_35): The Work item is formally closed and ECC Report 175 is published. However, SE24 received a liaison statement from SRDMG where they ask for some guidance to the draft ECC Decision for UWB on board aircraft. After having considered three inputs on this matter, SE24 replied to SRD-MG with proposed clarifications into the draft ECC Decision. In particular, two notes are included to address the protection of FSS in the band 7.25-7.75 GHz and MetSat in the bands 7.45-7.55 and 7.75-7.9 GHz.

Analyses of UWB LDC mitigation technique with respect to incumbent radiocommunication services in the band 2.69 to 5 GHz (SE24_37): no activity on this WI.

122 GHz compatibility between the Earth Exploration Satellite Service (EESS) and SRD (SE24_38): SE 24 further developed the draft ECC Report with some update on the calculations on the impact from SRD to EESS. The following limit is proposed for SRD in the band 122-122.25 GHz :

  • Maximum e.i.r.p.  : 20 dBm
  • Maximum e.i.r.p. density : 10 dBm/250 MHz
  • Maximum e.i.r.p. density above 30° elevation: -48 dBm/MHz

The applicability of the latter limitation to mobile SRD devices needs to be evaluated. The Report is expected to be completed at the next SE24 meeting.

Industrial wireless applications (SE24_39): the work has started on the identification of the required compatibility studies and the related scenarios and assumptions in the frequency band 5.725-5.875 GHz. Work will continue by correspondence.

MBANS (SE24_40): All systems are now being considered for scenarios involving healthcare-facility MBANSs. Some studies are rather stable. Other studies need revisions and completion, especially Amateur, LP-AMI and SAP/SAB.Scenarios involving location-independent MBANSs will be considered by October/November.

Future spectrum in UHF for SRD, RFID, SM and SG (SE24_41): Based on the available studies, some preliminary conclusions have been drawn and brought to the attention of SRD-MG. The need for appropriate mitigation techniques has been identified to address the various scenarios under consideration. Additional studies are required to define and assess those techniques.

Improvements for SRD in 863-870 (SE24_42): SE24 agreed on the structure for the development of the draft ECC Report on WI 42. For the SRD intra-coexistence part, relevant material should be incorporated taking into account ECC Report 37 and also ECC Report 181. Most of the discussion focused on the impact of LTE on SRDs. A general overview of the available material has been done and it was felt that this was valuable enough so that the drafting of text for the draft ECC Report can start immediately after this SE24_M66. Areas for further consideration have been identified.

169 MHz and Assisting Listening 'Devices (SE24_43): The work focused on task 1 (LDC parameters in the 169 MHz). A status Report for SRD/MG has been developed. It contains a short summary of the provided studies and proposes a LDC limit between 0.01 and 0.001% or the usage over night with a higher Duty Cycle.

General: SE24 has developed a liaison statement to STG asking clarification on the use of SEAMCAT for various areas relevant to SE24 (LBT, channel access, duty cycle, time patterns).

Next meetings:

  • M67, 17-19 October 2012, Copenhagen
  • M68, 7-8 January 2013, Dublin
  • M69, 12-14 March 2013, Karlsruhe
  • M70, 22-24 April 2013, Helsinki