1、 ETSI TS 143 055 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Dual Transfer Mode (DTM); Stage 2 (3GPP TS 43.055 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TS 143 055 V14.0.0 (2017-04)13GPP TS 43.055 version 1
2、4.0.0 Release 14Reference RTS/TSGR-0643055ve00 Keywords GSM ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Impo
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9、ion. ETSI ETSI TS 143 055 V14.0.0 (2017-04)23GPP TS 43.055 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI
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12、 the present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as
13、being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“
14、, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 143 055 V14.0.0 (2017-04)33GPP TS
15、 43.055 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5g3Motivation . 5g3Concept basis 5g3Class A mode of operation 6g31 Scope 7g32 References 7g33 Definitions and abbreviations . 8g33.1 Definitions 8g33.2 Abbrev
16、iations . 8g34 Class A capabilities 9g34.1 Main DCCH with SAPI=0 . 9g34.1.1 General 9g34.1.2 MS-SGSN tunnelling 9g34.2 Single slot operation . 10g34.2.1 General 10g34.2.2 TCH/H + PDCH/H . 10g34.3 Multislot operation . 11g34.3.1 General 11g34.3.2 Shared PDCH 11g34.3.3 Exclusive use of PDCH/H 11g34.3.
17、4 TCH/H + PDCH/F 11g34.3.5 Dual Carrier in the Downlink . 11g34.4 Bearer capability. 12g34.5 Indication of the DTM capabilities supported by the MS 12g34.5.1 Definition of MS DTM classes . 12g34.5.1.1 MS DTM classes . 12g34.5.1.2 Use of full and half rate . 12g34.5.1.3 Incremental support . 13g34.5.
18、2 Options 13g34.6 Indication of the capabilities 13g34.7 Compatibility issues . 14g35 Layer 1 14g35.1 Timing advance 14g35.2 Measurement reporting . 15g35.3 Power control in multislot operation 15g35.3.1 General 15g35.3.2 Uplink multislot power control . 15g35.3.3 Downlink multislot power control 15
19、g36 Signalling procedures . 15g36.1 Establishment . 15g36.1.1 General 15g36.1.2 PS establishment while in dedicated mode . 16g36.1.2.1 Principles . 16g36.1.2.2 MO session: packet request procedure 16g36.1.2.3 MT session 18g36.1.2.3.1 Ready state: packet downlink assignment . 18g36.1.2.3.2 Standby st
20、ate: packet notification 18g36.1.3 CS establishment while in packet transfer mode 19g3ETSI ETSI TS 143 055 V14.0.0 (2017-04)43GPP TS 43.055 version 14.0.0 Release 146.1.4 PS establishment while in dual transfer mode 22g36.2 Release . 22g36.2.1 Release of packet resources 22g36.2.2 Release of CS reso
21、urces 22g36.3 Handover 23g36.3.1 General 23g36.3.1a DTM Handover General 24g36.3.2 Internal handover 24g36.3.2a Intra-BSS DTM Handover 25g36.3.2a.1 General 25g36.3.2a.2 Preparation Phase using Optimized PS Handover procedure and without MSC involved . 26g36.3.2a.3 Preparation Phase using Non-Optimiz
22、ed PS Handover procedure and with MSC involved 26g36.3.2a.4 Execution Phase 26g36.3.3 External handover. 28g36.3.3a Inter-BSS DTM Handover 29g36.3.3a.1 General 29g36.3.3a.2 Preparation Phase 29g36.3.3a.3 Execution Phase 30g36.3.4 Inter-RAT DTM Handover . 32g36.3.4.1 General 32g36.3.4.2 Inter-RAT DTM
23、 Handover from GERAN A/Gb mode to UTRAN 34g36.3.4.3 Inter-RAT DTM Handover from UTRAN to GERAN A/Gb mode . 36g36.4 Location management 38g36.4.1 General 38g36.4.2 Cell update 39g36.4.3 Routeing Area update . 40g36.4.4 Location update 41g36.4.4.1 Change of Location Area in dedicated mode 41g36.4.4.2
24、Simultaneous Location Area and Routeing Area update procedures 42g36.5 Provision of the IMSI to the BSC . 43g36.5.1 General 43g36.5.2 Call establishment . 43g36.5.3 Session establishment . 43g36.5.3.1 Downlink session establishment . 43g36.5.3.2 Uplink session establishment 44g36.5.4 External handov
25、er . 44g36.6 In-band parameters . 44g36.7 MS behaviour in heterogeneous networks . 45g36.7.1 General 45g36.7.1 Suspension procedure . 46g36.7.2 Resume procedure. 46g37 DTM operation . 47g38 GPRS attach procedure while in dedicated mode and packet idle mode . 47g39 Security. 47g310 Header and Data Co
26、mpression . 47g3Annex A (informative): Possible improvements for future releases 48g3Annex B (normative): Incremental support of extended DTM multislot classes . 49g3Annex C (informative): Change history . 50g3History 52g3ETSI ETSI TS 143 055 V14.0.0 (2017-04)53GPP TS 43.055 version 14.0.0 Release 1
27、4Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it wi
28、ll be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the
29、second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction Motivation The definition of GPRS class A mode of operation in Release 9
30、7 assumes a total independence between the CS and PS domains. Thus the direct implementation of the existent standards for class A would result in mobile stations that are required to operate in two different frequencies either in the same timeslot, in timeslots n and n + 3 or their adjacent ones. T
31、his complicates enormously the internal architecture of the ME, resulting in a very high development cost, which both operators and manufacturers would prefer to avoid. Nevertheless, operators have expressed their need for this type of mobiles, since they want to offer services that demand the simul
32、taneous existence of a CS connection and a PS session. This is particularly important during the coexistence of GSM/GPRS with UMTS, as these capabilities will exist in UMTS. However, UMTS coverage may not be available in some areas where there is GSM/GPRS coverage (e.g. deep inside buildings or when
33、 roaming to a 2G network). As coverage is a vital service, in order for an operator to be able to sell “UMTS class A services“ it is necessary to be able to imitate class A services in areas of only GSM coverage. On the other hand, the provision of class A services with GERAN technology is also esse
34、ntial for operators without UMTS coverage. Concept basis A constant aim throughout this document is to reuse the existing functionality when possible, in order to minimise the impact on current implementations. In general, the changes proposed have little impact on the core network elements (i.e. MS
35、C and SGSN) and 3G TS 24.008 11. The solution outlined in this document overcomes the restrictions mentioned above and makes possible to have simultaneous CS and PS active connections. This is achieved by sending PS data (signalling and user data) on the timeslot use by the CS connection on timeslot
36、(s) not used by the CS connection ETSI ETSI TS 143 055 V14.0.0 (2017-04)63GPP TS 43.055 version 14.0.0 Release 14The possible timeslot configurations are based on two restrictions in Release 99: the number of timeslots allocated to the CS connection is limited to one; the timeslots allocated in each
37、 direction are contiguous. More flexible proposals are left for further study. In addition, for the definition of DTM multislot classes, the restrictions in 3G TS 45.002 6 for multislot capabilities shall apply. Figure 1 shows an example of a multislot configuration (2 uplink, 3 downlink). Figure 1:
38、 Example of multislot configuration of a GPRS simple class A mobile station in dual transfer mode. In a similar manner to UMTS, the A interface is modified so that the BSC knows the IMSI associated with each SCCP connection to the MSC. This means that the BSC is able to ensure that packet paging mes
39、sages can be delivered to mobile stations which have a connection to the MSC. The same functionality can be reused to deliver MSC originated pages to mobiles in packet transfer mode while the network is in mode of operation II (i.e. no Gs interface). Mobility management is basically the same as is s
40、pecified in 3GPP TS 23.060 9 for class A mobiles, but using the same techniques as UMTS for control of “in connection“ cell, routeing area and location area updates (e.g. System Information 6 message is extended to contain the Routing Area Code). If GPRS signalling needs to be sent during a standalo
41、ne voice call, then it is proposed that these LLC frames can be sent on the main DCCH (FACCH or SDCCH) with layer 2 SAPI 0. This uses a new Protocol Discriminator in 3GPP TS 24.007 for LLC: GTTP (GPRS Transparent Transport Protocol). The use of the main DCCH for GPRS signalling is subject to certain
42、 restrictions to reduce the harm to the speech quality. Inter-BSC handover is planned to be controlled by A interface signalling. The Old BSS to New BSS information element is used to indicate to the target BSC that the mobile station is in DTM. DTM Handover procedure is realized by utilizing in par
43、allel the handover procedures that are defined in 3GPP TS43.129 13 for the PS domain and in 3GPP TS 23.009 14 for the CS domain. Class A mode of operation For paging, the behaviour of the mobile station is as in class B mode of operation: the PCH takes priority to PPCH, and both to CBCH. The impleme
44、ntation described in this document also applies the restriction that the mobile station shall not be required to operate in two different frequencies in the same moment in time. However, GSM CS and GSM GPRS services will be still supported simultaneously. Thus, the feature here described is a subset
45、 of the GPRS class A capabilities. The mentioned subset will be referred as DTM. The specification of an unrestricted class A mode of operation that requires the mobile station to operate in different frequencies simultaneously shall not be forbidden. 0 1 2 3 4 5 6 7RxTxf1f20 1 2 3 4 5 6 7 0 1 20 1
46、2 3 4 5 6 7 0 1 2 3 4 5 6 75 6 7CS PS MeasurementsETSI ETSI TS 143 055 V14.0.0 (2017-04)73GPP TS 43.055 version 14.0.0 Release 141 Scope The present document is a description of the practical implementation of GSM-GPRS class A mobiles and a basis for discussion on the changes and additions to the cu
47、rrent specifications. This work is part of the Release 99 Work Item “BSS co-ordination of Radio Resource allocation for class A GPRS services - GSM Radio Access (R99)“ for which M Mouly of Nortel Networks is rapporteur. This work item was supported by Nortel, Motorola, Vodafone and Lucent. In the fo
48、llowing, GPRS refers to EGPRS, EGPRS2 and GPRS unless explicitly stated otherwise. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition
49、number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: “ Vocabulary for 3GPP Specifications “. 2 3GPP TS 22.060: “General Packet Radio Service (GPRS); Service description; Stage 1“. 3 3GPP TS 44.013: “Performance r
