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ETSI TS 102 744-3-3-2015 Satellite Earth Stations and Systems (SES) Family SL Satellite Radio Interface (Release 1) Part 3 Control Plane and User Plane Specifications Sub-part 3 Be_1.pdf

1、 ETSI TS 102 744-3-3 V1.1.1 (2015-10) Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 3: Bearer Connection Layer Interface floppy3TECHNICAL SPECIFICATION ETSI ETSI TS 102 744-3-3 V1.1.1 (2015-1

2、0) 2 Reference DTS/SES-00299-3-3 Keywords 3GPP, GPRS, GSM, GSO, interface, MSS, radio, satellite, TDM, TDMA, UMTS 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 enre

3、gistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present do

4、cument shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive wi

5、thin ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present docum

6、ent, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by wri

7、tten permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2015. All rights reserved. DECTTM, PLUGTESTSTM, UM

8、TSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ET

9、SI TS 102 744-3-3 V1.1.1 (2015-10) 3 Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g3Introduction 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative references 5g33 Abbreviations . 5g34 Bearer Connection Interface . 6g34.1 Radio Interface La

10、yering 6g34.2 Bearer Connection Layer Responsibilities . 6g34.3 Bearer Connection Layer Overview . 7g34.3.0 General 7g34.3.1 Bearer Connection Layer PDUs 7g34.3.2 Bearer Connections. 7g34.3.3 Ciphering 7g34.4 Conventions used in the present document 7g34.4.1 Presentation. 7g34.4.2 “Reserved“ Fields

11、and Values 8g34.4.3 Boolean Variables . 8g34.4.4 ASN.1 Encoding Rules . 8g35 Connection Protocol Data Unit (PDU) structure 8g35.0 General . 8g35.1 Bearer Connection PDU (BCnPDU) 8g35.1.0 General 8g35.1.1 RawDataPDU . 9g35.1.2 InformationPDU . 9g35.1.3 SupervisoryPDU . 10g35.1.3.0 General 10g35.1.3.1

12、 ReadyReceive 10g35.1.3.2 SelectiveReject 11g35.1.4 NumberedPDU . 12g35.1.5 SubSegmentPDU 12g35.2 Parameters 13g35.2.1 BcnSegType 13g35.2.2 BconnData 14g35.2.2.0 General 14g35.2.2.1 PdcpInfo 15g35.2.3 SequenceNum . 15g35.2.4 PDULength . 15g3Annex A (normative): ASN.1 16g3History 17g3ETSI ETSI TS 102

13、 744-3-3 V1.1.1 (2015-10) 4 Intellectual 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 members and non-members, and can be found in ETSI SR 000

14、 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigat

15、ion, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specificati

16、on (TS) has been produced by ETSI Technical Committee Satellite Earth Stations and Systems (SES). The present document is part 3, sub-part 3 of a mult-part deliverable. Full details of the entire series can be found in ETSI TS 102 744-1-1 i.1. Modal verbs terminology In the present document “shall“,

17、 “shall not“, “should“, “should not“, “may“, “need not“, “will“, “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

18、direct citation. Introduction This multi-part deliverable (Release 1) defines a satellite radio interface that provides UMTS services to users of mobile terminals via geostationary (GEO) satellites in the frequency range 1 518,000 MHz to 1 559,000 MHz (downlink) and 1 626,500 MHz to 1 660,500 MHz an

19、d 1 668,000 MHz to 1 675,000 MHz (uplink). ETSI ETSI TS 102 744-3-3 V1.1.1 (2015-10) 5 1 Scope The present document defines the Bearer Connection Layer (BCn) peer-to-peer interface of the Family SL satellite radio interface between the Radio Network Controller (RNC) and the User Equipment (UE) used

20、in the satellite network. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

21、reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot g

22、uarantee their long term validity. The following referenced documents are necessary for the application of the present document. 1 ETSI TS 102 744-1-3: “Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 1: General Specifications; Sub-part 3: Satellite

23、Radio Interface Overview“. 2 ETSI TS 102 744-1-4: “Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 1: General Specifications; Sub-part 4: Applicable External Specifications, Symbols and Abbreviations“. 3 ETSI TS 102 744-3-1: “Satellite Earth Stations

24、 and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 1: Bearer Control Layer Interface“. 4 ETSI TS 102 744-3-4: “Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 3: Control

25、Plane and User Plane Specifications; Sub-part 4: Bearer Connection Layer Operation“. 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non

26、-specific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for th

27、e application of the present document but they assist the user with regard to a particular subject area. i.1 ETSI TS 102 744-1-1: “Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 1: General Specifications; Sub-part 1: Services and Architectures“. 3 A

28、bbreviations For the purposes of the present document, the abbreviations given in ETSI TS 102 744-1-4 2, clause 3 apply. ETSI ETSI TS 102 744-3-3 V1.1.1 (2015-10) 6 4 Bearer Connection Interface 4.1 Radio Interface Layering As described in ETSI TS 102 744-1-3 1, the satellite communication protocol

29、is considered as a number of communication layers, as follows: Adaptation Layer (AL); Bearer Connection Layer (BCn); Bearer Control Layer (BCt); Physical Layer (L1). The satellite radio interface protocol stack is designed to seamlessly integrate with UMTS Non-Access Stratum entities, such as GPRS M

30、obility Management (GMM) and Mobility Management (MM), residing in the Core Network (CN) and in the upper layers of the User Equipment (UE). The Bearer Connection Layer provides support to the Adaptation Layer, and uses the services provided by the Bearer Control Layer, as shown in Figure 4.1. The p

31、resent document defines the Bearer Connection Layer peer-to-peer interface between the Radio Network Controller (RNC) and the UE, as shown in Figure 4.1. Figure 4.1: Control Plane Protocol Stack Layering (Bearer Connection Layer interface highlighted) 4.2 Bearer Connection Layer Responsibilities The

32、 function of the satellite radio interface Bearer Connection Layer is to provide a number of different data transport services to upper layers. The Bearer Connection Layer is generic to the radio interface and is responsible for the following: Queuing; QoS Policing; QoS Monitoring; Segmentation and

33、Re-assembly; ETSI ETSI TS 102 744-3-3 V1.1.1 (2015-10) 7 Ciphering; and Selectable ARQ. The functionality of the Bearer Connection Layer is therefore similar to that of the Radio Link Control (RLC) layer in UTRAN (UMTS Terrestrial Radio Access Network). The Bearer Connection layer peer-peer interfac

34、e definitions are described in the present document. 4.3 Bearer Connection Layer Overview 4.3.0 General The Bearer Connection Layer performs peer-peer signalling via Bearer Connection Layer PDUs. The Bearer Connection Layer signalling mechanisms introduce an overhead on the layer above. This overhea

35、d is kept to a minimum. 4.3.1 Bearer Connection Layer PDUs When registration is complete, and whenever a User Plane Connection is established, a Bearer Connection process is established which operates an HDLC-derived mechanism for support of the transfer of information between the RNC and the UE. Th

36、is mechanism introduces an overhead to each User Plane Protocol Data Unit (PDU) or UE-Specific Signalling PDU transferred over the satellite. The overhead varies depending upon the number of segments required to transfer the payload, but is kept to a minimum where possible. When operating the ARQ pr

37、otocol, the Bearer Connection process needs to signal to the peer to indicate the number of segments received/missing. This signalling is described within clause 5.1, Bearer Connection Layer PDU. 4.3.2 Bearer Connections A Bearer Connection is a specific logical connection being handled by the Beare

38、r Connection Layer, and this term is used to refer to the logical connection. Each Bearer Connection has an associated Bearer Connection ID, and has a single Bearer Connection process within the Bearer Connection Layer at both RNC and UE which handles the Bearer Connection. Note that for the case of

39、 a point-to-multi-point Bearer Connection, there is a single Bearer Connection process at the RNC and a single Bearer Connection process at each attached UE. 4.3.3 Ciphering For Bearer Connections operating in Acknowledged Mode (AM) or Unacknowledged Mode (UM), ciphering is also performed in the Bea

40、rer Connection Layer. Ciphering may be applied to the data segment of Information PDUs (see Figure 5.2) and Numbered PDUs (see Figure 5.6). A detailed description of how ciphering is performed in the Bearer Connection Layer can be found in ETSI TS 102 744-3-4 4. 4.4 Conventions used in the present d

41、ocument 4.4.1 Presentation The following conventions are applied throughout the present document: In the ASN.1 notation, variable names are always in lower case letters with hyphenation used to improve readability (e.g. ret-bct-pdu-header). Data Types in the ASN.1 always start with an upper case let

42、ter and may contain additional upper case letters to improve readability (e.g. ReturnBCtPDUHeader). In the explanatory text, these variables are referred to in italics (e.g. ret-bct-pdu-header), while Data Types are shown in Helvetica typeface (e.g. BCnPDU). The layout of the data structures defined

43、 in the ASN.1 is also shown in a graphical representation. In general, the variable names are presented in the same way they are presented in the ASN.1, with the following exceptions: insufficient space does not allow the complete variable name to be presented and it is therefore abbreviated; ETSI E

44、TSI TS 102 744-3-3 V1.1.1 (2015-10) 8 only one particular value can be assigned to a variable in the particular structure that is presented - in this case the variable is replaced by the appropriate numerical value; additional information may be added in brackets for explanatory reasons. 4.4.2 “Rese

45、rved“ Fields and Values Fields shown as Reserved BITSTRING () in the ASN.1 structures shall be set to zero by the sender and shall be ignored by the receiver. Values not allocated in Distinguished Value Lists shall not be used by the sender and shall be ignored by the receiver. NOTE: Distinguished V

46、alue Lists of type Integer are being used instead of the ENUMERATED data type, where the allocated number range is larger than the number of items to be enumerated. 4.4.3 Boolean Variables BOOLEAN variables shall be encoded as follows: TRUE := 1 FALSE := 0 4.4.4 ASN.1 Encoding Rules The ASN.1 presen

47、tation provided in the present document for this interface specification is normative. The encoding rules used for this interface specification are provided in clause 4.3.4 of ETSI TS 102 744-3-1 3. 5 Connection Protocol Data Unit (PDU) structure 5.0 General The Upper Layer PDUs (such as Adaptation

48、Layer Signalling PDUs, Packet Data Convergence Protocol (PDCP) PDUs, etc.) are segmented into a sequence of Bearer Connection Layer Protocol Data Units (BCnPDUs), if required. The length of each Bearer Connection Layer PDU depends on the physical bearer characteristics and is determined by the Beare

49、r Control sub-layer and signalled across the interface between Bearer Connection and Bearer Control processes. 5.1 Bearer Connection PDU (BCnPDU) 5.1.0 General The Bearer Connection PDU (BCnPDU) is passed to the Bearer Control Sub-Layer across the Bearer Connection Layer to Control Sub-Layer interface. This PDU may contain either raw-data or a formatted-pdu. This choice is implied when setting up the Bearer Connection. A formatted-pdu may contain either an ack-mode-pdu (if operating in Acknowledged Mode), a Sub-Segment (ss

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