1、 International Telecommunication Union ITU-T Q.3910TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2010) SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for the NGN Testing for NGN networks Parameters for monitoring NGN protocols Recommendation ITU-T Q.3910 ITU-T Q-SERIE
2、S RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGN
3、ALLING SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTER
4、WORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 SIGNALLING REQUIREMENTS AND PROT
5、OCOLS FOR THE NGN Q.3000Q.3999 General Q.3000Q.3029 Network signalling and control functional architecture Q.3030Q.3099 Network data organization within the NGN Q.3100Q.3129 Bearer control signalling Q.3130Q.3179 Signalling and control requirements and protocols to support attachment in NGN environm
6、ents Q.3200Q.3249 Resource control protocols Q.3300Q.3369 Service and session control protocols Q.3400Q.3499 Service and session control protocols supplementary services Q.3600Q.3649 NGN applications Q.3700Q.3849 Testing for NGN networks Q.3900Q.3999For further details, please refer to the list of I
7、TU-T Recommendations. Rec. ITU-T Q.3910 (06/2010) i Recommendation ITU-T Q.3910 Parameters for monitoring NGN protocols Summary Recommendation ITU-T Q.3910 defines the protocols for measuring and monitoring PSTN/ISDN emulation service (PES) and IP multimedia subsystem (IMS) solutions, including real
8、-time transfer protocol/real-time transfer control protocol (RTP/RTCP), session initiation protocol (SIP), H.248/media gateway control protocol (H.248/MEGACO), signalling transport (SIGTRAN) and bearer independent call control (BICC). How to monitor these parameters is out of scope of this Recommend
9、ation. History Edition Recommendation Approval Study Group 1.0 ITU-T Q.3910 2010-06-13 11 Keywords Monitoring parameters, NGN protocols. ii Rec. ITU-T Q.3910 (06/2010) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications
10、, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications o
11、n a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid d
12、own in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunicatio
13、n administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandator
14、y provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws atte
15、ntion to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or other
16、s outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent
17、the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.3910 (06/2010) i
18、ii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 4 Abbreviations 1 5 Conventions 3 6 Reference model . 4 7 RTP/RTCP monitoring and measurement parameters . 5 7.1 General . 5 7.2 Parameters for RTP/RTCP node status 5 7.3 Parameters for RTP/RTCP fault and quality 5 7.4 Parameters for RTP/RTC
19、P availability 6 7.5 Parameters for bandwidth utilization 6 8 SIP monitoring and measurements parameters . 6 8.1 General . 6 8.2 Parameters for SIP node status . 7 8.3 Parameters for SIP availability . 7 8.4 Parameters for SIP signalling utilization 7 8.5 Parameters for SIP fault and quality . 9 9 H
20、.248/MEGACO monitoring and measurement parameters 9 9.1 General . 9 9.2 Parameters for H.248/MEGACO node status 10 9.3 Parameters for H.248/MEGACO availability 10 9.4 Parameters for H.248/MEGACO utilization 10 9.5 Parameters for the quality of the H.248/MEGACO service . 11 10 SIGTRAN monitoring and
21、measurement parameters 11 10.1 General . 11 10.2 Parameters for SIGTRAN node status . 12 10.3 Parameters for SCTP association availability 12 10.4 Parameters for SIGTRAN utilization . 13 10.5 Parameters for SIGTRAN fault 14 11 BICC monitoring and measurement parameters . 15 11.1 General . 15 11.2 Pa
22、rameters for BICC node status . 15 11.3 Parameters for BICC availability . 15 11.4 Parameters for BICC signalling utilization 16 11.5 Parameters for BICC fault and quality . 18 iv Rec. ITU-T Q.3910 (06/2010) Page Appendix I Usage of parameters . 19 I.1 Traffic and network planning . 19 I.2 Quality 1
23、9 I.3 Fault and performance 19 Rec. ITU-T Q.3910 (06/2010) 1 Recommendation ITU-T Q.3910 Parameters for monitoring NGN protocols 1 Scope In order to effectively manage the resources provided by signalling over the NGN network, it is necessary to monitor and measure the present, and estimate the futu
24、re performance, utilization and availability of these resources. Thus, NGN monitoring and measurement parameters standardization should be provided. This Recommendation defines the protocols for measuring and monitoring PSTN/ISDN emulation service (PES) and IP multimedia subsystem (IMS) solutions, i
25、ncluding real-time transfer protocol/real-time transfer control protocol (RTP/RTCP), session initiation protocol (SIP), H.248/media gateway control protocol (H.248/MEGACO), signalling transport (SIGTRAN) and bearer independent call control (BICC). How to monitor and measure these parameters is out o
26、f the scope of this Recommendation. 2 References The following ITU-T Recommendations and other references contain provisions which, through references in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and ot
27、her references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The r
28、eference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2005), Gateway control protocol: Version 3. ITU-T Q.752 Recommendation ITU-T Q.752 (1997), Monitoring and measurements for Signal
29、ling System No. 7 networks. ITU-T Q.3902 Recommendation ITU-T Q.3902 (2008), Operational parameters to be monitored when implementing NGN technical means in public telecommunication networks. 3 Definitions None. 4 Abbreviations This Recommendation uses the following abbreviations and acronyms: ACM A
30、ddress Complete Message ANM Answer Message APM Application Transport BICC Bearer Independent Call Control CFN Confusion CGB Circuit/CIC Group Blocking CGBA Circuit/CIC Group Blocking Acknowledgement CGU Circuit/CIC Group Unblocking 2 Rec. ITU-T Q.3910 (06/2010) CGUA Circuit/CIC Group Unblocking Ackn
31、owledgement CIC Circuit Identifier Code CON Connect COT Continuity CPG Call Progress CQM Circuit/CIC group Query Message CQR Circuit/CIC group Query Response CRG Charge information FAA Facility Accepted FAC Facility FAR Facility Request FOT Forward Transfer FRJ Facility Reject GRA Circuit/CIC Group
32、Reset Acknowledgement GRS Circuit/CIC Group Reset IAM Initial Address Message IDR Identification Request IMS IP Multimedia Subsystem INF Information INR Information Request IP Internet Protocol IRS Identification Response IUA ISDN User Adaptation layer LOP Loop Prevention M2UA MTP 2 User Adaptation
33、layer M2PA MTP2 User Peer-to-Peer Adaptation Layer M3UA MTP 3 User Adaptation layer MG Media Gateway MGC Media Gateway Controller MEGACO Media Gateway Control protocol MTP Message Transfer Part NGN Next Generation Network NMS NGN Management System NRM Network Resource Management PES PSTN/ISDN Emulat
34、ion Service PS Packet Switching (network) PRI Pre-Release Information Rec. ITU-T Q.3910 (06/2010) 3 REL Release RES Resume RLC Release Complete RSC Reset Circuit/CIC RTCP Real-time Transfer Control Protocol RTP Real-time Transfer Protocol SAM Subsequent Address Message SCCP Signalling Connection Con
35、trol Part SCTP Session Control Transfer Protocol SDM Subsequent Directory Number SGM Segmentation SIGTRAN Signalling Transport SIP Session Initiation Protocol SLA Service Level Agreement SLS Service Level Specification SNMP Simple Network Management Protocol SS7 Signalling System No. 7 SUA SCCP User
36、 Adaptation SUS Suspend TM Technical Means UCIC Unequipped Circuit Identification Code URI Uniform Resource Identifier V5UA V5.2-User Adaptation layer UAL User Adaptation Layer USR User-to-user information 5 Conventions The NGN monitoring system is based on the evolution on the SS7 monitoring princi
37、ples. According to ITU-T Q.752, the following categories regarding the measured values should be defined in the NMS based on PES and IMS solutions: fault (F): Measurement for reporting processes and detecting problems, as well as for finding out some abnormal situations in the SS7, SIP and H.248/MEG
38、ACO signalling networks, and for NGN hardware, involving its reconfiguring and restarting procedures; quality (Q): Measurement for service level parameters intended for different traffic types involving voice and video under different services; for reporting processes; for assuming measures in provi
39、ding the guaranteed service level, as well as for developing an operators policy and strategy for providing a certain service level. It should be also used to have the SLA and/or SLS performed and relevant reports drawn up; traffic (T): Measurement for real-time traffic parameters based on IP-flow i
40、nformation for the purpose of identifying any unwanted or unauthorized traffic; studying any inside and 4 Rec. ITU-T Q.3910 (06/2010) outside impacts on network security; detecting any network abnormal events; defining the requested user-to-user, user-to-network or network-to-user interaction parame
41、ters; studying traffic changes trends; and conducting prevention management; accounting (A): Measurement for providing accounting and estimation data reliability by comparison; network administration and planning (N): Measurement for SS7 and NGN networks administration including the SIP and H.248/ME
42、GACO signalling systems; making decisions on network development and network planning; optimizing network infrastructure enhancement investment; planning applications and services; preparing traffic data to have the network further designed; near-real-time measurements (R): Measurement for detecting
43、 any faults in the network. It may be considered supplementary to the above-mentioned measurements. 6 Reference model According to ITU-T Q.3902, signalling system monitoring subsystems shall be independent of a vendors NGN TM (for example, MGC, PS, MG). In order to gather and initially process any o
44、ther subsystems information, the vendors NGN TM management systems shall be used. SNMP or NetFlow may be used as the interaction protocol among the monitoring system central elements. The message format shall be specified by telecommunication administrations. NMScentral elementSS7monitoringsubsystem
45、SIPmonitoringsubsystemH.248monitoringsubsystemNGNvendors TM management system monitoringFaults and reconfiguring procedures monitoringsubsystemIP information flows monitoring subsystemVoice (transfer) service level monitoring subsystemVideo streaming service level monitoring subsystemSLA/SLS monitor
46、ing subsystemApplication server monitoring subsystemFaults monitoringsubsystemFigure 1 Basic architecture of NMS ITU-T Q.3902 Rec. ITU-T Q.3910 (06/2010) 5 7 RTP/RTCP monitoring and measurement parameters 7.1 General RTP/RTCP performance, availability and utilization mostly depend on the IP network.
47、 RTP/RTCP node status, faults and quality, availability, and utilization indicators are detailed in Tables 1, 2, 3 and 4, respectively. The Usage column indicates the categories applicable to each parameter. The Interval column indicates the duration of each parameter. The Units column is used to in
48、dicate the registration items applied at the interval. The Mandatory column indicates those parameters which must be provided. 7.2 Parameters for RTP/RTCP node status The following parameters give status information of RTP/RTCP node. The comparison of several parameters might give additional informa
49、tion. Item 1.1 indicates the duration of unavailability of the destination node. Items 1.2 and 1.3 indicate, respectively, the start and the end of the destinations unavailability. Table 1 RTP/RTCP node status parameters Item Description of parameters Units Usage Interval Mandatory 1.1 Duration of the destination nodes unavailability second/node F, T, N 60 min Yes 1.2 Start of 1.1 event/node F, R On occurrence Yes 1.3 End of 1.1 event/node F, R On occurrence Yes 7.3 Parameters for RTP/RTCP fau
