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Study Group 11 meeting was held in Geneva, from 8-17 November 2017 and was attended by 96 delegates from 32 countries. Along with face-to-face meetings, most sessions from various Questions or joint Questions meetings were supported by remote participation capabilities.

Parallel events:

• ITU-T SG13, 6-17 November 2017;
• Joint Coordination Activity on Software-Defined Networking (JCA-SDN) meeting, 9 November 2017;
• Joint Coordination Activity on IMT2020 (JCA-IMT2020) meeting, 10 November 2017;
• Joint meeting with ETSI TC INT and Qs 2/11, Q9/11 and Q11/11, 13-14 November 2017;
• ETSI TC INT meeting, Geneva, 13-15 November 2017 (see ETSI website);
• ITU-T Conformity Assessment Steering Committee (webpage) meeting, 9 November 2017;
• Workshop on "Control plane of IMT-2020 and emerging networks. Current issues and the way forward" (15 November 2017).

1     Approved and Consented Recommendations (ITU-T A.8)
The following table shows the ‘Consented’ draft Recommendations.​

2     Supplements, Handbooks, Technical Papers, Guidelines and Corrigenda
2.1  Supplements
No Supplements were approved at this meeting.

2.2  Guidelines
No Guidelines were approved at this meeting.

2.3  Handbooks
No Handbooks were approved at this meeting.

2.4  Technical Papers
No Technical Papers were approved at this meeting.

2.5  Corrigenda
No Corrigenda were approved at this meeting.

3     SG11 Structure and Management
There were no changes to the structure of SG11.

Further to a communication from ENACOM, Argentina, Mr Mario Frigerio had to step down as Vice-chairman of SG11 and Mr Jose Hirschson Alvarez Prado also from ENACOM, Argentina was proposed to replace Mr Mario Frigerio.
The SG11 opening plenary approved Mr Jose Hirschson Alvarez Prado as SG11 Vice-chairman.
The meeting thanked Mr Frigerio and welcomed Mr Hirschson Alvarez Prado.

4     Regional groups of SG11
The reports of the Regional groups of SG11 (SG11RG-AFR and SG11RG-EECAT) were presented and approved at the opening plenary. Following the discussion of the contributions proposing some changes to the Terms of References, the revised ToR of both groups were approved at the opening plenary of SG11.
The revised ToR for SG11RG-AFR and SG11RG-EECAT are available in SG11-TD312/GEN and SG11-TD313/GEN accordingly.

5     Questions
There were no changes to the Questions texts at this meeting. 

6     Liaison officers and Rapporteurs
SG11 approved the appointment of the new Rapporteurs and Associate Rapporteurs as follows:

• Mr Juyoung PARK (ETRI) was appointed as Rapporteur for Q8/11. Mr Shin-Gak KANG will concentrate on his role as WP2/11 Chairman;
• Mr Kaoru KENYOSHI (NEC Corporation) was appointed as Rapporteur for Q10/11 instead of Acting Rapporteur.

​Due to absence of some rapporteurs it was decided to appoint acting rapporteurs for this particular meeting. The final list of Rapporteurs, Associate Rapporteurs and Acting Rapporteurs can be found in SG11-TD186-R2/GEN.

SG11 approved the appointment of new liaison officers and representatives as follows:

• Mr Awad MULAH (NTC, Sudan) was appointed as liaison officer to ITU-T SG5;
• Mr Rustam PIRMAGOMEDOV (Russia) was appointed as liaison officer to JCA-IdM;
• Mr Shin-Gak KANG (ETRI), Mr Kaoru KENYOSHI (NEC Corporation) and Mr Haining WANG (China Telecom) were appointed as liaison officers to JCA-IMT2020.

​The final list of Liaison Officers and representatives can be found in SG11-TD185-R1/GEN.

7     Action plan of ITU-T SG11 for the new Study Period (2017-2020)
During the first meeting of SG11 (February 2017), the SG11 Chairman presented the SG11 Action plan (SG11-TD173/GEN) which summarizes the strategy of the WPs for the current Study Period, according to the presentations given by the WPs Chairmen.
At the SG11 meeting (8-17 November 2017), the SG11 Chairman encouraged the WPs Chairmen to provide updates to the action plan at the next SG11 meeting (July 2018).

8     SDN and 5G/IMT-2020 related issues
SG11 finalized set of new ITU-T Recommendations dealing with SDN and other 5G related technologies. Among them were:

• ITU-T Q.3740: Signalling Requirements for SDN and NFV based Central Office services;
• ITU-T Q.3716: Signalling Requirements for Mapping between Physical and Virtual Networks;
• ITU-T Q.3715: Signalling requirements for dynamic bandwidth adjustment on demand on broadband network gateway implemented by software defined networking technologies;
• ITU-T Q.3714: Signalling requirements of SDN-based access networks with media independent management capabilities;

​All of the above new Recommendations were consented at the closing plenary of SG11 meeting (17 November 2017).
SG11 also advanced the ongoing work item Q.NS-LCMP "Protocol for network slice lifecycle management" and agreed to start several new work items on IMT-2020, as follows:

• Q.CE-APIMP: Protocol for managing capability exposure APIs in IMT-2020 network;
• Q.D2D-EECP: Energy efficient D2D communication protocol for IMT 2020 network;
• Q.QMP-TCA: QoS management protocol for time constraint applications over SDN;
• Q.SDN-CT: Framework of SDN controller testing.

​More information on these activities is available in the WP1/11 and WP2/11 reports accordingly (SG11-TD346-R1/GEN, SG11-TD347-R1/GEN).

9     Signalling issues
SG11 consented the revised Recommendation ITU-T Q.1912.5 "Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part" and advanced ITU-T Q.3405 "IPv6 protocol procedures for broadband services".

SG11 also agreed to start a new work item Q.ETN-DS "Signalling architecture of the fast deployment emergency telecommunication network to be used in a natural disaster" which aim is to describe the functional elements, services and signaling architecture of emergency telecommunication network which can be rapidly deployed in a country affected by a natural disaster.

10     SS7 security
SG11 meeting discussed number of contributions addressed to SS7 issues. Among them were proposals to revise ITU-T Q.731.3 and create new signaling procedures to be applied on SS7 stack.
With regards to Q.731.3, following the discussion, delegates reached consensus on the following procedure for generic number: In the local exchange, Generic number parameter indicating "additional calling party number" with the screening indicator "user provided, not verified" shall not be sent without service agreement.
Following the discussion of the proposed new work items, meeting agreed that verification of the identification of network entities (also the calling party number) is a very important method to achieve greater safety and security for network. At current stage, study on the requirements and architecture for interconnection between trustable network entities is needed. In this regards, it was agreed to start a new work item Q.SR-Trust "Signalling requirements and architecture for interconnection between trustable network entities".
More details are available in WP1/11 report and Q2/11 report accordingly (SG11-TD346-R1/GEN, SG11-TD332/GEN).

11     VoLTE/ViLTE interconnection
Following two years of study, SG11 consented two new ITU-T Recommendations dealing with VoLTE/ViLTE interconnection, as follows:

• ITU-T Q.3640: Framework of interconnection of VoLTE/ViLTE-based networks;
• ITU-T Q.3953: VoLTE/ViLTE interconnection testing for interworking and roaming scenarios.

​Following this result, SG11 agreed to start a new work item Q.DEN_IMS "Signalling architecture of distributed ENUM networking for IMS" which will define the signalling architecture of distributed ENUM networking in support of IMS interconnection. Even though this new work item will focus on signalling aspect, it was decided to start this new work item with an approval process of TAP.
SG11 also made progress on ongoing work item Q.suppl.Multi_Device_ETS "Signalling requirements for VoLTE-based network and GSM/UMTS network supporting Multi-device emergency telecommunications service" and agreed to start several new work items on VoLTE/ViLTE matters, as follows:

• Q.VoLTE-SAO-req: Requirements for signalling network analyses and optimization in VoLTE;
• Q.Suppl.VoLTE_ETS_Interconnection: Signalling requirements for interconnection between VoLTE-based network and other networks supporting emergency telecommunications service (ETS);

​The details are available in WP1/11 and WP3/11 reports accordingly (SG11-TD346-R1/GEN, SG11-TD348/GEN).

12     Fifth meeting of the ITU-T Conformity Assessment Steering Committee (CASC)
SG11 approved the revised Terms of Reference (ToR) of CASC, which were aligned with WTSA-16 Resolution 2 and Resolution 76 referring to joint ITU/IEC certification scheme.
CASC discussed the collaboration approach with IECEE TF in order to establishing joint certification scheme. It was agreed that the Chairman will contact the representatives of IEC asking them to provide their inputs to the ongoing CASC’s guidelines for consideration at the next CASC meeting.
CASC also updated list of focal points of ITU-T SGs to CASC according to received inputs from ITU-T SGs.
The CASC agreed that it will meet again during the next meeting of SG11 (20 July 2018) (TBC). Also, it was agreed that CASC will use its mailing list t17sg11casc@lists.itu.int as a useful tool to facilitate discussion between its members to progress the work of CASC. It also can be used for exchanging some inputs and ideas related to the ongoing work items, which might become contributions to the next CASC meeting.
The meeting report can be found in SG11-TD329/GEN. More details are available on the ITU-T CASC web page.

13     Implementation of ITU C&I Programme
According to inputs received from ITU-T SGs, ITU-T SG11 updated the reference table of ITU-T Recommendations suitable for C&I testing. The information was updated on the ITU C&I Portal accordingly (see www.itu.int/go/reference-table).

14     Internet related performance measurements
SG11 discussed the draft ITU-T Q.3961 "Testing methodologies of Internet related performance measurements including e2e bit rate within the fixed and mobile operator's networks". In spite of achieved progress and bearing in mind the received LS from SG12, SG11 decided to put draft ITU-T Q.3961 on hold for the time being. The SG11 will return to the draft ITU-T Q.3961 as soon as the relevant standard appears in other Standardization Bodies.
The meeting report can be found in SG11-TD339/GEN.

15         Collaboration with ETSI TC INT
SG11 continues collaborating with ETSI TC INT through current joint activities and some new areas. Among current joint activities are:

• Interconnection of VoLTE/ViLTE networks;
• Testing specifications;
• Internet related performance measurements.

​The next joint meeting of Q9/11, Q11/11 and ETSI TC INT is scheduled to take place in Prague (hosted by University of Prague) from 20-22 March 2018. All details are available on the SG11 web page.

16     Combating counterfeit ICT and mobile device theft
SG11 made progress on the ongoing work items:

• Draft Recommendation Q.FW_CCF "Framework for solution to combat counterfeit ICT Devices";
• Draft Recommendation Q.FW_CSM "Framework for Combating the use of Stolen Mobile ICT Devices";
• Draft Technical Report TR-BP_CF "Technical Report - Guidelines on Best Practice and Solutions for Combating Counterfeit ICT Devices".

​More details of the discussion are available in the WP3/11 report (SG11-TD348/GEN).

17     International Telecommunication Regulation (ITR)
SG11 discussed the incoming Liaison Statement from TSAG requesting background information on the implementation of the 2012 International Telecommunication Regulations (TSAG-LS 8). Following the response to the TSAG request, which was sent by SG11 Chairman in September 2017, SG11 decided to reply to the incoming Liaison Statement providing additional information (SG11-LS20). The response includes information below.
Concerning the relevant ITU-T Recommendations and the role of SG11 has in implementing the 2012 ITRs, the SG11 meeting agreed the following:

• SG11 is a technical study group and at this time, SG11 has not perceived any impact the 2012 ITRs have on ITU-T Recommendations, developed and approved by SG11;
• SG11 recognizes that there are a series of ITU-T Recommendations developed by SG11 that are related to the provision of International Calling Line Identification (mentioned in article 3.6 of 2012 ITRs), including:
• ITU-T Q.731 series: The Recommendation defines signalling requirements to supplementary services such as CLIP, CLIR, COLP and COLR;
• Q.3617-Q.3639: Service and session control protocols – supplementary services based on SIP-IMS.

​SG11 also decided to reflect this information in the report of SG11 for the TSB Director’s consideration.

18     IoT testing
SG11 consented new Recommendation ITU-T Q.3952 "The architecture and facilities of Model network for IoT testing". Several draft new Recommendations were advanced during this SG11 meeting.
All details are available in the meeting report SG11-TD342/GEN. 

19     Workshop on "Control plane of IMT-2020 and emerging networks. Current issues and the way forward" (15 November 2017)
SG11 organized a Workshop on "Control plane of IMT-2020 and emerging networks. Current issues and the way forward" which took place in Geneva on 15 November 2017. The goal of the workshop was to identify current issues on signalling protocols for emerging networks, including interconnection, worldwide practices and perspectives on the implementation of 5G/IMT-2020/emerging networks and potential new areas for standardization on control plane of the 5G/IMT-2020/emerging networks.
Among the results of the workshop were some suggestions to SG11 as a lead group on signaling and protocols:

• Establish collaboration with open source communities to speed up the de facto standards;
• Continue to coordinate with the related SDOs (3GPP, ETSI, MEF, etc.) to develop the specs and promote the testing in 5G, network slicing, hybrid network, QoE, QoS;
• Encourage members who have gained fruitful experiences through emerging network practice to submit contributions to promote the SDN/NFV-related testing standardization work in SG11;
• Encourage members to initiate possible work items, which are related to new emerging technologies, such as IoT IMS signaling, Fog/Edge Computing.

​The event was attended by 82 participants from 28 Countries. All presentations including outcomes of the Workshop are available on the event’s web page at: https://www.itu.int/en/ITU-T/Workshops-and-Seminars/201711/Pages/default.aspx.

20    Outgoing Liaison Statements
The following table shows the list of the nineteen agreed outgoing liaison statements. See SG11-TD183-R2/GEN.

21     Approved new work items
The following table shows the list of the thirteen new work items. See SG11-TD410-R1/GEN.

22     Work plan for interim Working Party and Rapporteur meetings
The following represents the interim meetings plan as agreed at SG11 Plenary (Geneva, 17 November 2017). Also in SG11-TD184-R1/GEN.

22.1  Working parties
No Working Party meeting will be held before the next SG11 meeting.
22.2  Rapporteur groups
The following interim Rapporteurs’ groups meetings are agreed by SG11 Plenary (Geneva, 17 November 2017).

23     Regional Groups’ meetings
SG11 was informed about plans of Regional Groups’ for 2018. However, dates and venue are not confirmed yet. The detailed information will be circulated through the relevant mailing lists and reflected on the Regional Groups web pages.

24     Promotion of SG11 work
At the closing plenary of SG11, it was proposed to organize ITU Workshop "Combating counterfeiting and stolen ICT devices" during next SG11 meeting in July 2018. The announcement will follow.

25     Next Study Group 11 meeting
The next SG11 meeting is scheduled to take place from 18-27 July 2018. The dates and venue will be confirmed.