1、STD.ETSI ES 201 b59-ENGL 1997 3400855 0423208 251 ETSI ES 201 659 v1.1.1 (1999-07) ETSI Standard Terrestrial Trunked Radio (TETRA); Digital Advanced Wireless Service (DAWS); Medium Access Control (MAC) service description STD-ETSI ES 203 659-ENGL I999 3400855 0423209 198 - 2 ETSI ES 201 659 V1.l.l (
2、199407) Reference DEWETRA-04035 (fd000icp.PDF) Keywords data, TETRA Postal address F-06921 Sophia Antipolis Cedex - FRANCE Office address 650 Route des Lucioles - Sophia Antipolis Valbonne - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Cos-Pdfechim de
3、iraa (Os) No 7803488 Association but non lucratif enregistre ia internet secretariat Oetsi.fr Individual copies of this ETSI deliverable can be downloaded from httpYhww.etsi.org If you find errors in the present document, send your comment to: editoretsi.fr Copyright Notification No part may be repr
4、oduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in ail media. 8 European Telecommunications Standards Institute 1999. All rights reserved. _ STDmETSI ES 201 b59-ENGL 3999 3400855 0423230 90T m 3 ETSI ES 201 659 V1.l . 1 (199947) C
5、ontents Intellectual Property Rights . 5 Foreword 5 1 SCO pe 6 2 References . 6 3 Definitions and abbreviations 6 3.1 Definitions . 6 3.2 Abbreviations . 7 4 Introduction 8 5 Registration Services . 8 6 Bandwidth Management Services . 9 6.1 Base station bandwidth management . 9 6.2 Mobile station ba
6、ndwidth management . 9 6.3 Power management 9 7 Transport Services . 9 7.1 Architecture . 9 7.1.1 Mobile station architecture . 10 7.1.2 Base station architecture . 10 7.2 Transport protocol suite . 11 7.2.1 Unacknowledged downlink 11 7.2.2 Unacknowledged uplink . 11 7.2.3 Acknowledged protocols 11
7、7.2.3.1 Acknowledged Downlink, Best-effort QS . 12 7.2.3.2 Acknowledged Uplink, Best-effort QOS 13 7.2.3.3 Acknowledged Downlink, Controlled-load QOS . 13 7.2.3.4 Acknowledged Uplink. Controlled-load QOS 13 7.3 Transport failure handling 13 7.3.1 Unacknowledged downlink failure . 13 7.3.2 Unacknowle
8、dged uplink failure 13 7.3.3 Acknowledged failure 13 8 Service Pnmitives 14 8.1 Primitive Definitions 14 8.1.1 MAC-unack-transfer-request 14 8.1.2 MAC-unack-transfer-confirm 14 8.1.3 MAC-unack-transfer-indication 14 8.1.4 MAC-ack-transfer-request . 15 8.1.5 MAC-ack-transfer-confirm . 15 8.1.6 MAC-ac
9、k-transfer-indication . 15 8.1.7 MACcreategrotocol-request 16 8.1.8 MAC-create-protocol-confm . 16 8.1.9 MAC-deletegrotocol-request 16 8.1.10 MAC-deletegrotocol-confm 17 8.1.11 MAC-hunt-request 17 8.1.12 MAC-hunt-confrm . 17 8.1.13 MACservice-request 17 8.1.14 MAC-service-confm . 18 8.1.15 MACservic
10、e-indication . 18 8.2 Parameter Definitions 18 8.2.1 base-station -ID 18 8.2.2 ack-transfer-receipt-ack 18 8.2.3 ack-transfer-resuit . 18 8.2.4 configure-schedulingult . 19 STD.ETS1 ES 20% b5el-ENGL 1999 3400855 042L2LL 46 4 ETSI ES 201 659 V1.l.l (199947) 8.2.5 8.2.6 8.2.7 8.2.8 8.2.9 8.2.10 8.2.1
11、1 8.2.12 8.2.13 8.2.14 8.2.15 8.2.16 8.2.17 8.2.18 creategrotocol-result 19 delete-protocol-result 19 hunt-result 19 LPDU . 19 MS-handle . 19 new-scheduling-state . 19 newservice-state . 20 protocol-instance-iD . 20 protocol-parameters . 20 protocoltype . 20 queue-empty-result . 20 service-result .
12、20 service-status . 20 unack-transfer-receipt-ack 21 Bibliography 22 History 23 STDmETSI ES 201 659-ENGL 1999 = 3400855 0421212 782 5 ETSI ES 201 659 V1.1.1 (199947) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The infor
13、mation pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in SR O00 3 14: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notifed to ETSI in respect of ETSI standards“, which is available free of charge
14、 from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/www.etsi.orglipr). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been canid out by ETSI. No guarantee can be. given as to the existence of other IPRs not referenced in SR O00 314 (
15、or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This ETSI Standard (ES) has been produced by ETSI Project Terrestrial Trunked Radio (TETRA). An overview of the requirements for DAWS can be found in TR 101 156 i. STDIETS1 ES 201
16、b59-ENGL 1999 9 3400855 0421213 b19 6 ETSI ES 201 659 Vl.l.1 (lSssO7) 1 Scope The present document specifies the service requirements for the Digitai Advanced Wireless Service (DAWS) Medium Access Control (MAC) layer. The present document provides a conceptual architecture. useful for specifjhg serv
17、ice requirements but is not intended to imply a particular implementation. The present document contains preliminary MAC protocol requirements which will be moved into the formal MAC protocol specification document (Part 5) when it is drafted. 2 References The following documents contain provisions
18、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, etc.) or non-speci fic. For a specific reference, subsequent revisions do not apply. For a non-specific reference,
19、subsequent revisions do apply. 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 TR 101 156: “Terrestrial Trunked Radio (TETRA); Technical requirements specification for Digital Advanced Wireless Service (DAWS)“. 21 Void. 31
20、 Void. 41 Void. 51 Void. 61 TS 101 60: “Digital Advanced Wireless Service (DAWS); Physical Layer (PHY); Service Description“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: base station: piece of equipment providin
21、g simultaneous. bi-directional network access to mobile stations block: fixed-length sequence of bytes from a MAC PDU contention-free: physical layer access method in which there is no possibility that two or more correctly operating mobile stations will transmit simultaneously in a manner which lea
22、ds to mutually destructive interference between the transmissions contention-possible: physical layer access method in which there exists the possibility that two or more correctly operating mobile stations will transmit simultaneously in a manner which leads to mutually destructive interference bet
23、ween the transmissions contention-reduced: contention-possible physical layer access method designed to have reduced possibility of mutually destructive interference between two or more correctly operating mobile stations STDOETSI ES 201 b59-ENGL 1999 3400855 0423234 555 7 ETSI ES 201 659 V1.l.l (19
24、9407) downlink: general term meaning “from the base station to the mobile station“ frame: minimum time period reserved for transmission by a single mobile station on a single frequency mobile station: piece of equipment able to create and consume data but only having network access via a base statio
25、n multirame: time period consisting of an integral number of frames between base station broadcasts specifying mobile station bandwidth assignments protocol data unit: set of parameters andor data passed from peer to peer by a protocol primitive protocol instance: two protocol processes which exchan
26、ge messages in order to transfer data from one protocol process to the other protocol primitive: request, response, or informative message sent from peer to peer protocol process: entity created to manage one end of a peer-to-peer protocol. For unidirectional data flows, a protocol process can be fu
27、rther described as either a sender process or a receiver process serving cell: physical area serviced by a base station service data unit: set of parameters andor data passed between adjacent layers by a service primitive service primitive: request, response, or informative message sent between adja
28、cent layers sub-protocol: portion of a protocol performing a clearly identifiable operation uplink general term meaning “from the mobile station to the base station“ 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK ARQ BE BS CL DAWS DL DQOS IP LLC MA
29、C MAC-BWM MAC-REG MAC-TFT MPDU MS MSH MSI MTU PDU PHY QOS RSVP SAP SDU TQOS UNACK UL Acknowledged Automatic Repeat Request Best-Effort Base Station Controlled-Load Digital Advanced Wireless Service Downlink Data Integrity Quality Of Service Internet Protocol Logical Link Control Medium Access Contro
30、l MAC Bandwidth Management Service MAC Registration Service MAC Transport Service MAC Protocol Data Unit Mobile Station Mobile Station Handle Mobile Station Identifier Maximum Transmission Unit Protocol Data Unit Physical Layer Quality Of Service Resource Reservation Protocol Service Access Point Se
31、rvice Data Unit Timing Quality Of Service Unacknowledged Uplink _ STD.ETS1 ES 201 b57-ENGL 5777 3400855 O42112115 491 m 8 ETSI ES 201 659 V1.l.l (1999-07) 4 Introduction The DAWS protocol architecture is provided in TR 101 156 I. The Medium Access Control (MAC) provides services to the Logical Link
32、Control (LLC) and requests services from the Physical layer (PHY). The present document describes the services the MAC shall provide to function within a DAWS network. The prefix MAC will be used when a requirement applies to both the BS and MS MAC layers. The prefix BSMAC or MS-MAC will be used whe
33、n a requirement applies only to the BS or MS MAC layers, respectively. As shown in figure 1. the LLC accesses MAC services via service access points (SAPS) A, B, and C. MACSAP-A is for service primitives related to PDU transfers using unacknowledged protocols; MACSAP-B is for service primitives rela
34、ted to PDU transfers using acknowledged protocols; and MAC-SAP-C is for local control and status service primitives. LLC LAYER MAC-SAP-C TRANSPORT SERVICE I (MAC-TPT) I- - PHY-SAP-A PHY LAYER PHY-SAP-B Figure 1: DAWS MAC Architecture The MAC accesses PHY services via service access points A and B. P
35、HY-SAP-A is for data transfer service primitives and PHY-SAP-B is for control and status service primitives. The services provided by the MAC can be divided into three major areas: registration, bandwidth management, and transport. Requirements for each of these services are provided in clauses 5,6,
36、 and 7. Service primitives and associated service data units are provided in clause 8. 5 Registration Services The MAC registration service (MAC-REG) is responsible for interacting with the PHY layer to maintain the highest possible signal quality for the current serving cell, as well as performing
37、adjacent cell scans when requested by LLC-REG. MAC-REG is also responsible for managing hand-over in sectorisexi cells. This clause will be expanded after a DAWS PHY layer is defined. STD-ETSI ES 201 b59-ENGL 1999 = 3400855 042121b 328 9 ETSI ES 201 659 Vl.l.1 (199947) 6 Bandwidth Management Service
38、s The MAC bandwidth management service (MAC-BWM) is responsible for allocating bandwidth over the physical medium for MS in full-power and power-saving modes of operation. The BS and MS share bandwidth allocation responsibility, and are thus jointly responsible for the timing quality of service (TQO
39、S) delivered to flows. 6.1 Base station bandwidth management BSMAC-BWM shall allocate bandwidth on a per-MS basis, not a per-flow basis. BS-MACBWM shall consider the current state of all input queues and QOS contracts for each registered MS, and then shall dynamically allocate a portion of available
40、 free bandwidth to each MS. During multiframe N, BSMAC-BWM shall prepare and send a PHY-configurn-sysiafo-reques primitive TS 101 660 6 containing frame assignments for multiframe N+2 to the PHY layer. PHY-LNK will send the system information PDU associated with PHY-configure_sydnfo-quest to all MS
41、in the cell during frame O of multiframe N+1. This MS will then have an entire rnultiframe to prepare for activity during multiframe N. BS-MACBWM shall share bandwidth allocation information with BSMAC-TPT. BS-MAC-TPT shall issue PHY-transfer-request primitives to supply the BS-PHY layer with downli
42、nk PDUs. 6.2 Mobile station bandwidth management MS-MAC-BWM shall divide the bandwidth allocation dynamically granted by BS-MACBWM among its acknowledged protocol processes. During times of increasing system congestion, MS-MAC-BWM shall decrease the TQOS for the best-effort protocol processes before
43、 decreasing the TQOS for the controlled-load protocol processes. MSMAC-BWM shall share bandwidth allocation information with MS-MAC-TPT. MSMAC-TPT shall issue PHY-transfer-request primitives to supply the MS-PHY layer with uplink PDUs. 6.3 Power management MAC-BWM shall support a power conservation
44、strategy which allows the MS to remain in a low power consumption state for a considerable portion of the time. A power conserving MS shall resume normal operation before attempting an MPDU transfer. The QOS delivered to an MPDU from a power conserving MS shall be equivalent to that delivered to an
45、MPDU from an MS operating in full-power mode, except that the downlink and uplink MPDU transfer establishment latency may be longer. 7 Transport Services The MAC transport service (MAC-TPT) is responsible for the transfer of MPDUs over the physical medium. This clause discusses the architecture of M
46、AC-TPT, provides requirements for the protocols in the MAC-TPT protocol suite, and describes MAC-TPT error handling. 7.1 Architect u re As shown in figures 2 and 3, MAC-TPT is composed of a suite of six separate protocols: NACK-DL unacknowledged downlik, UNACK-m unacknowledged uplink, 0 ACK-BE-DL ac
47、knowledged downlink, best-effort traffic; ACK-BE-UL: acknowledged uplink, best-effort traffic; STDmETSI ES 201 b59-ENGL 1999 3400855 0421237 264 ACYCL-DL 10 ETSI ES 201 659 V1.l.l (199947) 0 ACK-CL-DL acknowledged downlink, controlled-load traffic; ACK-CL-UL: acknowledged uplink, controlled-load tra
48、ffic. MAC-TPT is not required to support “direct-mode“ MPDU transfers, i.e. direct transfers between two or more MS within a single cell without intermediate handling by a BS. However, it is recommended that the design of MAC-TP not preclude the addition of a direct-mode protocol at a later date. Th
49、e MAC-TFT architecture is designed to permit easy expansion of the protocol suite (for example, the addition of protocols for guaranteed QOS) if necessary. The next two clauses describe how the six base protocols are integrated into the BS and MS MAC transport architecture. 7.1.1 Mobile station architecture As shown in figure 2, MS-MAC shall create and maintain a pair of protocol processes, UNACK-DL and UNACK-UL, upon power-up. These processes handle the transfer of downlink and uplink PDUs using unacknowledged protocols. When MS-LLC
