​​​​Executive Summary of the ITU-T Working Party 1/5 Meeting “EMC, lightning protection, EMF” (Geneva, 21-25 May 2018)

Statistics

• Participants: 50
• Contributions: 62
• TDs (not counting the revisions): 56 
• Incoming/ Outgoing liaison statements: 3 incoming liaison statements / 4 Outgoing liaison statements TD517​ (also see LS database)

Main discussions and results

• Consented Recommendations: 5 at this meeting;
• Recommendations Decided/Determined/Approved: none at this meeting;
• Recommendations agreed for Deletion: none at this meeting;
• Other texts agreed: 5 at this meeting;
• New work items: 7 at this meeting.

Major accomplishments

Recommendations Consented by WP1/5 for Last Call (AAP - Recommendation A.8)

Revised Recommendations​

Agreed informative texts

Agreed questionnaire

New work items

List of stale work items

TSB provided information on the list of stale work items as contained in TD522. The Rapporteur of the concerned Question was encouraged to discuss these work items during his sessions and take appropriate action.The concerned work item was updated during the sessions.

Working Party 1/5 - EMC, lightning protection, EMF

Working Party 1/5 made significant progress and achieved the following key outcomes:

Question 1/5 - Protection of information and communication technology (ICT) infrastructure from electromagnetic surges  

The Rapporteur of Q1/5 (Mr Chuanyou Dai) opened the meeting and presented the draft agenda contained in TD506-R1.

Six Contributions and one Temporary Document relevant to Q1/5 were discussed during the Q1/5 meeting. The following Contributions were discussed: C246 “Comments and re-proposals on K.vss "Lightning protection and Earthing of Video Surveillance System" (from NTT) and TD523 on “Comments and reply to C246 and C103-R1” for draft Recommendation ITU-T K.vss “Lightning protection and earthing of video surveillance system”; C245-R1 “The fourth draft of K.psp "Protection of small-size telecommunication installations with poor earthing conditions" (from China Unicom) for draft Recommendation ITU-T K.psp “Protection of small-size telecommunication installation with poor earthing condition”; C230-R1 “Review of IEC 62305-4” (from Littelfuse) for draft revised Recommendation ITU-T K.40 “Protection against lightning electromagnetic impulses in telecommunication centres”; C223 “Experience of Cameroon in the protection of radio base station (RBS) against lightning” (from Cameroon). for draft revised Recommendation ITU-T K.56 “Protection of radio base stations against lightning discharges”; and C240 “Proposal to add a new Appendix to give some examples for protection GPS system against lightning in ITU-T K.112” (from Huawei) for draft revised Recommendation ITU-T K.112 “Lightning protection, earthing and bonding: Practical procedures for radio base stations”.

The Contribution C270-R1 “IP PoE camera systems - Bridging Functional Insulation - implications and system consequences” (from Bourns Limited) for draft Recommendation ITU-T K.vss, which was proposed to both Q1/5 and Q2/5, was not discussed during the Q1/5 meeting because it was presented at the Q2/5 meeting.

Q1/5 progressed significantly on the current work.

The report of Q1/5 meeting is contained in TD511-R2.

Question 2/5 - Equipment resistibility and protective components

The Rapporteur of Q2/5 (Mr Mick Maytum) opened the meeting and presented the draft agenda contained in TD507-R1.

There were twenty-eight Contributions and six TDs (including one liaison) received and discussed in Q2/5. Two Contributions were not discussed and are delayed until the next meeting since Recommendation ITU-T K.128 "Surge protective component application guide - metal oxide varistor (MOV) components​" has not yet been published. A supplement to Recommendation ITU-T K.51 on "Narrow pin spacing in connectors potential hazards" was finalized and sent for agreement to WP1/5. Major discussion topics duringQ2/5 sessions were on: the length of cables that would remain untested, the test levels for Ethernet interfaces (which required an additional test column in Recommendations ITU-T K.20 “Resistibility of telecommunication equipment installed in a telecommunication centre to overvoltages and overcurrents” / ITU-T K.21 “Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents” labelled as intermediate), and the introduction of a new intra-system concept.

The report of Q2/5 meeting is contained in TD512-R2.

Question 3/5 - Human exposure to electromagnetic fields (EMFs) from information and communication technologies (ICTs)

The Rapporteur of Q3/5 (Mr Fryderyk Lewicki) opened the meeting and presented the draft agenda contained in TD508-R1.

During ten Q3/5 sessions, twenty-five documents were discussed.

Three Recommendations were also discussed, revised and submitted for consent to WP1/5. 

Most of the discussions were dedicated to the draft new Supplement: K.Suppl-Harmonization “The impact of RF-EMF exposure limits stricter than the ICNIRP or IEEE guidelines on 4G and 5G mobile network deployment”. After a fruitful discussion, the text of this important document has been completed and submitted for agreement to WP1/5​ as contained in TD536-R4.

The draft new Supplement K.BPrac “Radiofrequency electromagnetic field (RF-EMF) exposure levels from mobile and portable devices during different conditions of use” was discussed, completed and submitted to WP1/5 for agreement as contained in TD528-R2​.

Recommendation ITU-T K.90 “Evaluation techniques and working procedures for compliance with exposure limits of network operator personnel to power-frequency electromagnetic fields” was revised. The revision includes update of references and bibliography and addition of keywords. It was agreed to submit it for consent to WP1/5.

A new version of the software EMF-estimator (Appendix I to K.70) was discussed and it was agreed to submit it for agreement to WP1/5.

A new Appendix II “Management of RF-EMF Compliance for Shared Radiocommunications Sites” to Recommendation ITU-T K.121 on “Guidance on the environmental management for compliance with radio frequency EMF limits for radiocommunication base stations” was discussed and it was agreed to submit it for agreement to WP1/5.

During this meeting, six new work items were discussed and submitted for approval. The creation of these new work items responds to the need to follow up on the fast development of new mobile systems.

Two outgoing Liaison Statements, providing information about outcomes of this meeting were aproved. One liaison statement will be sent to ITU-R and ITU-D and the other one to WHO.

Many informative documents have been discussed and will be used for the development of future work items within Q3/5.

The work programme has been discussed, updated and approved.

The report of Q3/5 meeting is contained in TD513-R4.

Question 4/5 - Electromagnetic compatibility (EMC) issues arising in the telecommunication environment

The Co-rapporteur of Q4/5 (Mr Beniamino Gorini/ Mr Xing Hai Zhang) opened the meeting and presented the draft agenda contained in TD509-R2.

All documents related to Question 4/5 were discussed in six meeting sessions.

The Contributions and the drafts of Recommendation ITU-T K.IPE “Electromagnetic compatibility requirements for Information Perception Equipment”; ITU-T K.radio_emc “Electromagnetic Compatibility requirements for radio telecommunication equipment - Product family Recommendation”; ITU-T K.wire-line_emc “Electromagnetic compatibility requirements for wire-line telecommunication network equipment- Product family Recommendation”; and ITU-T K.pim “Passive intermodulation test methods of array antenna systems in mobile communication systems” were discussed.

Q4/5 made significantly progress during this meeting and new draft Recommendations are expected to be submitted for consent during the next ITU-T SG5 meeting to be held in September 2018.

It was agreed to start the revision of the following Recommendation:
- ITU-T K.123 "Electromagnetic compatibility requirements for electrical equipment in telecommunication facilities" (C249).

Two liaison statements were received from ITU-R WP1A and WP5D and responses were prepared accordingly as contained in TD546-R1 and TD547-R2.

The report of Q4/5 meeting is contained in TD514-R1​.

Question 5/5 - Security and reliability of information and communication technology (ICT) systems from electromagnetic and particle radiations

The Rapporteur of Q5/5 (Mr Yuichiro Okugawa) opened the meeting and presented the draft agenda contained in TD510-R1.

Q5/5 has received two Contributions regarding the drafting of two Recommendations on soft error.

Regarding draft Recommendation ITU-T K.soft_mes “Quality estimation methods and application guidelines for mitigation measures based on particle radiation tests”, the third draft was proposed and reviewed. During the discussion, some editorial comments were raised and some were addressed.

Regarding draft Recommendation ITU-T K.soft_req “Reliability requirement of particle radiation effect for telecommunication systems”, a second draft was proposed and reviewed. There was a comment about individual differences in soft error failure rate and the editor clarified this point.

Furthermore, Q5/5 agreed that comments and suggestions on both draft Recommendations will be reflected in the next drafts to be presented at the next SG5 meeting in September.

Significant progress was made to the drafting of two new Recommendations and the Rapporteur hopes that these draft Recommendations will be finalized and submit them for consent at the next SG5 meeting.

The report of Q5/5 meeting is contained in TD​515-R2.

​Rapporteur group meetings (including e-meetings)

Dates of next ITU-T SG5 meeting