1、ETSI/TC SMG Released by : ETSI/PT 12 Release date: February 1992 6 RELEASE NOTE Recommendation GSM 03.05 Signalling Requirements Relating to Routing of Calls to Mobile Subscribers Previously distributed version : 3.2.0 (Updated Release 1 /90) New Released version February 92 : 3.2.0 (Release 92, Pha
2、se 1) 1. Reason for chanaes No changes since the previously distributed version. m 3404583 00b7900 438 H ETS I-G S M Tech n cal Specif cat ion GSM 03.05 Verilon 3.2.0 UDC: 621.396.21 Key words: European Digital Cellular Telecommunications System, Global System for Mobile Communications (GSM) Europea
3、n digital cellular telecommunication system (phase 1); Techn cal Perfor mance Objectives ETSI European Telecommunications Standards Institute ETSJ Setretsrlat: B.P.152 . F - 06561 Valbonne Cedex . France TP. + 33 92 94 42 00 TF. + 33 93 65 47 16 Tx. 47 00 40 F Previous page - Copyright European Tele
4、communications Standards Institute 1992. All rights reserved. is blank No part may be reproduced or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. m 3
5、404583 OOb9901 374 m PREFATORY NOTE ETSI has constituted stable and consistent documents which give specifications for the implementation of the European Cellular Telecommunications System. Historically, these documents have been identified as “GSM recommendations“. U Some of these recommendations m
6、ay subsequently become Interim European Telecommunications Standards (I-ETSs) or European Teletcommunications Standards (ETSs), whilst some continue with the status of ETSI-GSM Technical Specifications. These ETSI-GSM Technical Specifications are for editorial reasons still referred to as GSM recomm
7、endations in some current GSM documents. The numbering and version control system is the sa me for ETSI-GSM Technical Specifications as for “GSM recommendations“. m 3404583 00b02 200 Page 3 GSM 03.05 . version 3.2.0 : October 1991 CONTENTS 1 . SCOPE . 5 2 . GENERAL . 5 3 . PERFORMANCE DESIGN OBJECTI
8、VES 5 3.1 General . 5 3.2 MSCs . 6 3.2.1 Reference loads 6 3.2.1.1 Reference load on incoming interexchange circuits 6 3.2.1.2 Reference load for MS originating calls 6 3.2.1.3 Impact of supplementary services 7 3.2.2 Inadequately handled call attempts . 7 3.2.2.1 Definition 7 3.2.2.2 Probability of
9、 inadequately handled call attempts occuring 7 3.2.3 Delay probability . 8 3.2.3.1 User signalling acknowledgement delay 8 3.2.3.2 Signalling transfer delay 8 3.2.3.4 Incoming call indication sending delay - (for terminating and internal traffic connections) . 10 3.2.3.5 Connection release delay . 1
10、0 3.2.3.6 Call clearing delay 11 3.2.3.7 Timing for start of charging (circuit switched calls) 11 3.2.3.8 Call Set-up delay . 11 3.2.3.9 Handover delay . 11 3.2.3.10 Off-air-call-set-up (OACSU) delay 12 3.2.3.1 1 Discontinuous reception mode delay 12 3.2.4.1 Premature release 12 3.2.4.2 Release fail
11、ure . 12 3.2.4.3 Incorrect charging or accounting 12 3.2.4.4 Misrouting . 13 3.2.4.5 No tone . 13 3.2.4.6 Other failures 13 3.2.4.7 Transmission performance 13 3.2.4.8 Slip rate 13 3.3 Performance design objectives for HL Rs 14 3.3.2 Objectives . 14 3.4 Performance design objectives for VL Rs 14 3.4
12、.1 Reference loads . 14 3.4.2 Objectives . 14 3.2.3.3 Through connection delay 9 3.2.4 Call processing performance objectives . 12 3.3.1 Reference loads . 14 4 . Transmission characteristics 15 4.1 General . 15 4.1.1 BS-MSC path . 15 4.1.2 MSC . 15 4.2 System Delay distribution 15 4.2.1 Speech Chann
13、el Delay . 15 4.2.2 Data Channel Delay 18 m 3404583 0069903 147 m Page 5 GSM 03.05 - version 3.2.0 : October 1991 1. SCOPE This Recommendation contains technical performance objectives that should be met for the fixed infrastructure of GSM PLMNs. Concerning transmission delay for the PLMN in section
14、 4, the requirements should also be met by GSM Mobile Stations. These performance design objectives are applicable to all implementations at all points in the growth cycle up to the maximum size. These reference loads and performance objectives may be used by manufacturers in designing GSM PLMNs and
15、 by Administrations or RPOAs in evaluating a specific design or for comparing different designs for potential use in the Administrations or RPOAs intended implementation. 2. GENERAL For terminology and architecture for GSM PLMNs see Recommendation GSM 03.02. Interfaces, interface characteristics, co
16、nnections through an MSC and ancillary functions of the MSC are defined in Recommendation GSM 11.30. The functions supported by HLRs and VLRs are given in Recommendations GSM 11.31 and 1 1.32. Each MSC will be responsible for synchronisation, if required, with the fixed network to which it is connec
17、ted. The requirements of CCIll Recommendation (2.541 should be observed. Timing and synchronisation of the radio subsystem is specified in the Recommendation GSM 05.10. 3. PERFORMANCE DESIGN OBJECTIVES 3.1 Genoral Part of the text is taken from CCTTT Recommendation Q.543 and part from CEPT Recommend
18、ation T/S 64-30. Previous page is blank 3404583 0067904 083 Page 6 GSM 03.05 - vetolon 3.2.0 : October 1991 3.2 MSCo 3.2.1 Reference loads The reference loads are traffic load conditions under which the performance design objectives stated below are to be met. The following reference loads are defin
19、ed. a) Reference load for incoming inter-exchange circuits b) Reference load for MS originating calls (including all Dm channel activities) Reference load A is intended to represent the normal upper mean level of activity which Administrations or RPOAs would wish to provide for MSs, BS-MSC circuits
20、and inter-exchange circuits. Reference load B is intended to represent an increased level beyond normal planned activity levels. 3.2.1.1 Reference load on Incoming Interexchange clrcults a) . Reference load A - 0.7 Erlang average occupancy on all incoming circuits with 20 call attempts/hour/incoming
21、 circuit. This figure assumes 25% ineffective call attempts. Reference load 8 - 0.85 Erlang average occupancy on all incoming circuits with 25 call attempts/hour/incoming circuit. 3.2.1.2 Reference load for MS orlglnatlng calls a) Reference load A TABLE l/Traffic model for MS originating calls inten
22、sity (Erl/sbtr) gar per second 0.02 (Mote) Note: Provisional value. This value doesnt include sending of traffic measurement data. 3404583 0069905 TIT Page 7 GSM 03.05 - version 3.2.0 : October 1991 b) Reference load B Reference load 6 is defined as a traffic increase over reference load A of: + 25%
23、 in Erlangs. with + 35% in BHCA. Reference load B levels for Dm channel activity are for further study. 3.2.1.3 Impact of tupplemontary towIces If the reference model MSC assumes that significant use is made of supplementary services. the performance of the MSC can be strongly affected, especially i
24、n designs where processor capacity can become a limiting item. The performance delays recommended can be significantly lengthened at a given call load under such circumstances. The Administration or Operating Agency defining the reference model should estimate the fractions of calls which use variou
25、s supplementary services so that an average processor impact relative to a basic telephone call can be calculated. 3.2.2 Inadequitoly handlod call attompts 3.2.2.1 Definition inadequately handled call attempts are attempts which are blocked (as defined in CCITT E.600 series of Recommendations) or ar
26、e excessively delayed within the exchange. “Excessive delays“ are those that are greater than three times the “0.95 probability of not exceeding“ values recommended in the tables. For originating and transit calls, this inadequately handled call attempt parameter applies only when there is at least
27、one appropriate outlet available. 3.2.2.2 Probablllty of lnrdequrtoly handlod call attempts occuring The values in Table 2 are recommended. TABLE 2 Ifype of comctionlReferme Load AIReferencc Load 4 I nterru 1 s 10-2 fi x 10-2 Or i gi not ing s3 x 10-2 Termirut ing 52 x 10-3 s2 x 10-2 Transit 10-3 10
28、-2 25 x 10-3 3q04583 0069906 956 Moan value a.% probability of not exceeding Page 8 GSM 03.05 - version 3.2.0 : October 1991 600 m 800 m 600 m lo00 I 3.2.3 Delay probabllly Mean value 200 IR0 a50 nB O.% probibi 1 i ty of not exending coo m mm The following notes apply to the delay parameters include
29、d in this section: 1. The term “mean value“ is understood as the expected value in the probabilistic sense. 2. The terms “received from“ and “passed to“ the signalling system are meant to be that instant at which the information is exchanged between the signalling data link (layer 1) and the signall
30、ing link functions (layer 2) in CCm Signalling System No. 7. For Dm channel signalling it is designated as that instant when the information is exchanged between the data link layer (layer 2) and the network layer (layer 3) by means of primitives. Consequently, the specified time intervals exclude t
31、he layer 1 and layer 2 times. However, they do include queuing delay in the absence of disturbances, but not additional queuing caused by retransmission of signalling messages. 3.2.3.1 User signalling acknowledgement delay User signalling acknowledgement delay is the interval from the instant a user
32、 signalling message has been received from Dm channel until a message acknowledging the receipt of that message is passed back from the MSC to Dm channel. Examples of such m.essages are SETUP ACKNOWLEDGEMENT to SETUP CONNECT ACKNOWLEDGEMENT to CONNECT and RELEASE ACKNOWLEDGEMENT to RELEASE. The valu
33、es in Table 3 are recommended TABLE 3 I 1 Reference trd A I Reference toad B I 3.2.3.2 Signalilng transfer delay The MSC signalling transfer delay is the time taken for the MSC to transfer a message from one signalling system to another with minimal or no other exchange actions required. The interva
34、l is measured from the instant that a message is received from a signalling system until the moment the corresponding message is passed to another signalling system. Examples of messages are ALERT to ADDRESS COMPLETE, ADDRESS COMPLETE to ADDRESS COMPLETE, CONNECT to ANSWER, RELEASE to DISCONNECT etc
35、. The values in Table 4 are recommended for originating and terminating connections. TABLE 4 IRefermce load A I Reference load B I I . W 3404583 O069907 72 Mean value O.% probabi Lity of not exceeding Page 9 GSM 03.05 - version 3.2.0 : October 1991 Referme Lod A Referme Lod B Uithout Uith Uithout Ui
36、th ancillary ancillary ancillary ancillary fvwtii function fvwtion furtion 250 ms SO mi 400 REI 500 ins 300 RLI 500 RLI 600 ms 600 ms 3.2.3.3 Through connection delay Mean value 0.95 probsbi 1 i ty of not exceeding a) For originating outgoing traffic through connection delay is defined as the interv
37、al from the instant that the signalling information required for setting up a connection through the MSC is received from the incoming signalling system to the instant that the transmission path is available for wrying traffic between the incoming and out going terminations on the MSC. 250 1116 400
38、lm 300 m 600 ms Usually, both directions of transmission will be switched through at the same time. However, at an originating exchange. on certain calls, there may be a requirement to effect switch through in two stages, one direction at a time. In this case, different signalling messages will init
39、iate the two stages of switch through and the recommended delay applies to each stage of switch through. The values in Table 5 are recommended: for internal and terminating traffic the through connection delay is defined as the interval from the instant that the CONNECT message is received from the
40、Dm channel until the through connection is established and available for carrying traffic and the ANSWER and CONNECT ACKNOWLEDGEMENT messages have been passed to the appropriate signalling systems. The values in Table 6 are recommended. TABLE 6 I I Referme load A I Reference load 8 I m 3404583 00699
41、08 729 m O.% probability of not exceeding Page 10 GSM 03.05 - vorsion 3.2.0 : October 1991 600 Ins 1000 1118 3.2.3.4 Incoming call Indication sending delay - (for terminatlng and lntornai rafflc connections) The incoming call indication sending delay is defined as the interval from the instant at wh
42、ich the necessary signalling information is received from the signalling system to the instant at which the SWP message is passed to the signalling system of the called subscriber. In the case of overlap sending in the incoming signalling system, the values in Table 7 are recommended. TABLE 7 I I Re
43、ference load A I Reference Load B I /Mean VaLuc I 400 1118 I MIO 1118 I In the case of en-bloc sending in the incoming Signalling system, the values in Table 8 are recommended. O.% probnbility of not exceeding TABLE 8 Reference load A Referme Load B 800 1118 rzoo rn 3.2.3.5 Connoction rolease doiiy
44、Connection release delay is defined as the intenral from the instant when DISCONNECT or RELEASE message is received from a signalling system until the instant when the connection is no longer available foc use on the call (and is available for use on another call) and a corresponding RELEASE or DISC
45、ONNECT message is passed to the other signalling system involved in the connection. The values in Table 9 are recommended. TABLE 9 Reference load A Reference tod B Men valw 0.95 probabi Li ty of not exceeding 3404583 00b9909 665 O.% prombility of not exceeding Page 11 GSM 03.05 - version 3.2.0 : Oct
46、ober 1991 200 Ins 350 ms 3.2.3.6 Call clearing delay Disconnect and call clearing will usually be performed at the same time. However, on certain calls it may be necessary for an exchange to retain call references after disconnect has occurred, until a clearing message is received. The exchange may
47、then discard the call reference information. The corresponding RELEASE message must be passed on to other involved signalling systems in the interval allowed for signalling transfer delay. 3.2.3.7 Timing for start of charging (circuit rwltched calls) When required, timing for charging at the MSC whe
48、re this function is performed, shall begin after receipt of an ANSWER indication from a connecting exchange or the called user. The start of timing for charging should occur within the intervals recommended in Table 10: TABLE 10 I I Reference load A I Reference Lod B I 3.2.3.8 Call Set-up delay Defi
49、nition and objective for MS originating and terminating calls for further study (two objectives: a) all parameters are in the VLR, b) parameters must be retrieved from HLR). Authentication delay, objectives are also to be included). 3.2.3.9 Handover delay Two cases are to be defined a) b) objectives are for further study and should include: i) interruption of communication path i i) between BSs of the same MSC between BSs of different MSCs probability of success where initiation was successful 3404583 0069930 387 Pago 12 GSM 03.05 - verrlon 3.2.0 : Octobe
