1、ETSI TS 101 763-2 1.1.1 (2000-04) Technical Specification Broadband Radio Access Networks (BRAN); HIPERLAN Type 2; Cell based Convergence Layer; Part 2: UNI Service Specific Convergence Sublayer (SSCS) 2 ETSI TS 1 O1 763-2 V1.l.l (2000-04) The pre ent d Reference DTSIBRAN-0024003-2 Keywords access,
2、cell, hyperlan, UNI ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 0001 7 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the
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6、edia. O European Telecommunications Standards Institute 2000. All rights reserved. ETSI 3 ETSI TS 1 O1 763-2 V1.l.l (2000-04) Contents Intellectual Property Rights 4 Foreword 4 1 2 3 3.1 3.2 4 5 5.1 5.2 5.2.1 5.2.2 5.3 5.4 5.4.1 5.4.2 6 6.1 6.2 6.2.1 6.2.2 6.2.3 6.2.4 6.3 6.3.1 7 7.1 7.2 7.3 7.3.1 7
7、.3.2 7.3.3 7.3.4 7.3.5 7.3.6 7.3.7 7.3.8 7.3.9 7.4 8 Scope 4 References 5 Definitions and abbreviations1 6 Definitions 6 Abbreviations . 6 Convergence Layer architecture 6 Cell based Convergence Layer . 7 General . 7 UNI Service Specific Part Convergence Sublayer 8 Functional Model 8 Cell Based Conv
8、ergence Layer Planes . 8 Service Access Point 10 Primitives . 11 Primitive types 11 Parameter definitions 11 Procedures 12 General . 12 Association . 12 General 12 Convergence Layer Identification . 12 CL-capabilities 12 DLC-Connection Establishment . 13 Handover 14 Miscellaneous . 14 Convergence La
9、yer specific parameters 14 Convergence Layer Identifier . 14 Convergence Layer Version . 14 Information element format 14 Information Elements for Cell based SSCS 14 Information element type coding 15 ATM VC Identifier range . 15 Number of supported ATM connections . 16 Number of supported DLC conne
10、ctions . 16 Peak cell rate . 17 UNI-version 17 ATM Address . 18 Interface to the DLC . 19 UNI SSCS - MIB 19 Connection mapping . 16 Annex A (normative): Coding Conventions 20 Annex B (informative): B . 1 Association procedure for UNI SSCS 21 Connection Mapping Example . 24 Bibliography . 26 History
11、27 ETSI 4 ETSI TS 1 O1 763-2 V1.l.l (2000-04) 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 fo
12、und in SR O00 3 14: “Intellectual Propero Rights (IPRs); Essential, or potentially Essential, IPRs notifed to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/www.etsi.org/ipr). Pursuant to the ETSI IPR Polic
13、y, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in SR O00 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
14、Specification (TS) has been produced by the ETSI Project Broadband Radio Access Networks (BRAN). The present document defines the functionality required for interworking HIgh PErformance Radio Local Area Network (HIPERLAN) Type 2 with ATM control plane functions defined for the User Network Interfac
15、e (UNI) 3. The Cell based Convergence Layer is split into several parts. Part 1, Common Part, describes the functionality for mapping ATM cells into data units used at the Data Link Control (DLC) layer. Further parts, each defining a Service Specific Convergence Sublayer (SSCS), describe the control
16、 plane functionality required to support a specific signalling protocol, e.g. ATMFs M-UNI protocol specification 4. It is envisioned that several, independent, service specific parts will be added as market requirements develop in the future. The present document is part 2 of a multi-part TS coverin
17、g the HIPERLAN Type 2; Cell based Convergence Layer, as identified below: Part 1: “Common Part“; Part 2: “UNI Service Specific Convergence Sublayer (SSCS)“. 1 Scope The present document describes the interworking between UNI signalling protocols and the HIPERLAN/2 control plane. The present document
18、 is applicable to HIPERLAN/2 equipment supporting ATM UNI signalling according to one of the following UNI standard recommendations: Q.2931 3, ATMF UNI 3.1 5, ATMF UNI 4.0 6 and M-UNI 4. The present document addresses only the functionality required to map ATM UNI signalling over the HIPERLAN/2 netw
19、ork, i.e. between an HIPERLAN/2 Access Point and Mobile Terminal. It does not address the requirements and technical characteristics for wired network interfaces at the Access Point and at the Mobile Terminal. The Cell based Convergence Layer consists of a Common Part Convergence Sublayer 7 and seve
20、ral Service Specific Convergence Sublayers (SSCS), which are defined in separate documents. The task of the Common Part of the Cell based Convergence Layer is to map between the fixed data unit of an ATM cell and the fixed data unit size used in the HIPERLAN/2 DLC layer. The Service Specific Converg
21、ence Sublayers all use services provided by the Common Part Convergence Sublayer and the HIPERLAN/2 Data Link Control (DLC) layer. The present document does not address the requirements and technical characteristics for type approval and conformance testing. These are covered in separate Technical S
22、pecifications. ETSI 5 ETSI TS 1 O1 763-2 V1.l.l (2000-04) 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 number, version number, e
23、tc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same number. il ETSI TS 101 761-1: “Broadband Rad
24、io Access Networks (BRAN); HIPERLAN Type 2; Data Link Control (DLC) Layer; Part 1: Basic Data Transport Functions“. ETSI TS 101 761-2: “Broadband Radio Access Networks (BRAN); HIPERLAN Type 2; Data Link Control (DLC) Layer; Part 2: Radio Link Control (RLC) sublayer“. ITU-T Recommendation Q.293 1 (19
25、95): “Broadband Integrated Services Digital Network (B- ISDN) - Digital Subscriber Signalling System No. 2 (DSS 2) - User-Network Interface (UNI) - Layer 3 specification for basic callkonnection control“. ATM Forum (BTD-WATM-01.12): “Wireless ATM Capability Set 1 Specification - Draft“. ATM Forum (a
26、f-uni-0010.000): “UNI Signalling 3.1“. ATM Forum (af-sig-O06 1 .OOO): “UNI Signalling 4.0“. Pl 31 41 Pl 61 VI ETSI TS 101 763-1: “Broadband Radio Access Networks (BRAN); HIPERLAN Type 2; Cell based Convergence Layer; Part 1: Common Part“. SI PI 101 i 11 ATM Forum (af-lane-0084.000): “LANE v2.0 LUNI
27、Interface“. IETF RFC 1577: “Classical IP and ARP over ATM“. ATM Forum (af-mpoa-O 114.000): “Multi-protocol Over ATM Specification, Version 1.1“. IETF RFC2364: “PPP over AALS“. I21 IETF RFC 1755: “ATM Signalling Support for IP over ATM“ U31 u41 ATM Forum (af-ilmi-0065.000): “ILMI 4.0“. ETSI TS 101 47
28、5: “Broadband Radio Access Networks (BRAN); HIPERLAN Type 2; Physical (PHY) layer“. ETSI 6 ETSI TS 1 O1 763-2 V1.l.l (2000-04) 3 3.1 Definitions and abbreviations1 Definitions For the purposes of the present document, the following terms and definitions apply: HPERLAN/2: HIgh PErformance Radio Local
29、 Area Network Type 2, a short-range wireless LAN providing broadband local access. Standardized by ETSI Project BRAN Protocol Data Unit (PDU): data unit exchanged between entities at the same IS0 layer Service Data Unit (SDU): data unit exchanged between adjacent IS0 layers 3.2 Abbreviations For the
30、 purposes of the present document, the following abbreviations apply: ACF AP ATM BRAN CPCS CPE DLC DCC DUC ES1 MPOA MT NP PPP RLC SAP sscs UNI M-UNI u-SAP vc VCI VP VPI DLCC-ID DUC-ID MAC-ID Association Control Function Access Point Asynchronous Transfer Mode Broadband Radio Access Networks (Project
31、) Common Part Convergence Sublayer Customer Premises Equipment Data Link Control Data Link Control Connection Identifier DLC Connection Control DLC User Connection DLC User Connection Identifier End System Identifier Medium Access Control Identifier Multi Protocol over ATM Mobile Terminal Network Pr
32、efix Point-to-Point protocol Radio Link Control Service Access Point Service Specific Convergence Sublayer User Network Interface User Network Interface + Mobility Extension User Service Access Point Virtual Channel Virtual Channel Identifier Virtual Path Virtual Path Identifier 4 Convergence Layer
33、arch i tect u re The Convergence Layer (CL) resides on top of the Data Link Control (DLC) layer. The task of the Convergence Layer is to adapt the service requirements of different Higher Layers to the services offered by the HIPERLAN/2 DLC layer. Two Convergence Layers can be distinguished in BRAN,
34、 a Cell based Convergence Layer and a Packet based Convergence Layer (see figure 4.1). Further Convergence Layers may be specified in the future. The Cell based Convergence Layer offers services to Higher Layers that use the fixed size ATM cell as the transfer unit. The Packet based Convergence Laye
35、r offers services to Higher Layers that use packets or frames of variable size or fixed size, which exceed the ATM cell size. Typical examples of these are Ethernet and the Internet protocol suite. ETSI 7 ETSI TS 1 O1 763-2 V1.l.l (2000-04) Figure 4.1 : HIPERLANR Convergence Layers 5 5.1 Cell based
36、Convergence Layer General The Cell based Convergence Layer provides the capability to transfer User Service Data Units (User SDUs), that correspond to an ATM cell, transparently between users of the Convergence Layer. The Cell based CL itself consists of two parts, a Common Part Convergence Sublayer
37、 (CPCS) 7 and a Service Specific Convergence Sublayer (SSCS). It is intended that several different Service Specific Convergence Sublayers will be specified within BRAN. An Access Point may support several SSCSs simultaneously. The CPCS describes the user plane functionality, i.e. how the informatio
38、n contained in an ATM cell is mapped into a HIPERLAN/2 DLC transport unit (SDU) and vice versa. The CPCS performs the adaptation between the User SDU and the DLC-SDU. User SDUs belonging to different ATM connections can be multiplexed on one DLC connection. Multiple DLC connections can be set up. Th
39、e SSCS defines the mapping of Control Plane procedures for connection and mobility management between HIPERLAN/2 and the ATM specific control plane. The network model is shown in figure 5.1. HIPERLAN/2 Mobile Terminals (H/2 MTs) are attached to an ATM network via a HIPERLAN/2 Access Point (H/2 AP).
40、The data transfer between MTs and the AP is ATM. Applications running in the MT and the CPEs that are attached to the ATM-network communicate via ATM. Additional protocols like LANE SI, Classical IP 9 MPOA lo, or PPP i i may be invoked by the communicating applications. These protocols use services
41、provided by the ATM transport network and are negotiated during connection establishment phase. See also 12. ETSI 8 ETSI TS 1 O1 763-2 V1.l.l (2000-04) HIPERLC vvireiess Local Area Network Wireless Port Figure 5.1 : HIPERLAN/2 supporting ATM transport 5.2 UNI Service Specific Part Convergence Sublay
42、er 5.2.1 Functional Model The UNI Service Specific Convergence Sublayer is a part of the Cell based Convergence Layer. It provides the adaptation of the ATM User Network Interface (UNI) signalling to the Radio Link Control (RLC) functions of HIPERLAN/2. Functions include association, connection cont
43、rol, and disassociation. It is assumed that standard UNI signalling is used for ATM connection control and mobility management 4, 18. The AP may act as signalling endpoint for UNI signalling or may relay signalling traffic transparently to a signalling entity within the network, e.g. the ATM-switch
44、the AP is attached to. The location of the SSCS in a specific entity, e.g. AP or ATM-switch, is implementation specific and therefore not specified within HL/2. 5.2.2 Cell Based Convergence Layer Planes Figure 5.2 shows the protocol layers and the model of the planes for ATM-transport in HIPERLAN/2.
45、 Three planes are distinguished: User Plane; ATM Control Plane; HIPERLAN/2 Control Plane. ETSI 9 UNI - Signalling ETSI TS 1 O1 763-2 V1.l.l (2000-04) H/2 Control Plane UNI -Signalling 0 scope of BRAN specifications ATM Adaptation Layer User Plane Plane Signalling VC Via User Plane Signalling VC prot
46、ocols, Va User Plane out of scope HIPERLAN/2 Mobile Terminal HIPERLAN/2 Access Point Figure 5.2: Protocol stacks in the MT and the AP Table 5.1 lists the protocol layers as shown in figure 5.2 and their respective functions. ETSI 10 ETSI TS 1 O1 763-2 V1.l.l (2000-04) lane Jser Plane Table 5.1 : Lay
47、er Decscription Protocol Layer Function Layer 3 encapsulation Encapsulation of application data ATM Adaptation Layer (AAL) ATM Segmentation and Reassembly ATM ATM cell transport Cell based Common Part Convergence Sublayer DLC transport format HIPERLAN/2 DLC Layer See l HIPERLAN/2 PHY Layer See 14 Ad
48、aptation between ATM-cell stream and HIPERLAN/2 ATM Control Plane Layer 3 protocol Layer 3 protocols, like LAN emulation 8, Classical IP over ATM 9, 12, Multiprotocol over ATM lo, and PPP over ATM ll. i I PE RLAN/2 2ontrol Plane UNI signalling protocol Signalling VC Cell based UNI Service Specific C
49、onvergence Layer ATM UNI Signalling including SAAL functionality ATM Transport via User Plane Mapping of UNI signalling to DLC control functions; configuration of connection mapping between ATM connection identifier cVPI, VCb and HU2 identifier c DLCC- I D , CL-Tag The bridging between wireless network and fixed network is out of the scope of BRAN. To achieve interoperability between MTs and APs in a multivendor environment the control plane configuration should be signalled during association. The layer 3 protocol and encapsul
