1、ETSI TS 101 659 1.2.1 (2000-04) Technical Specification Terrestrial Trunked Radio (TETRA); Digital Advanced Wireless Service (DAWS); Medium Access Control (MAC) Service Description 2 ETSI TS 1 O1 659 V1.2.1 (2000-04) Reference RTSITETRA-04047 Keywords TETRA, PDO, data, radio ETSI Postal address F-O6
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5、ation No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2000. All rights reserved. ETSI 3 ETSI TS 1 O1 659 V1.2.1 (2000-04) Contents Intellectual Pro
6、perty Rights 5 Foreword 5 Introduction 5 1 Scope 7 2 References 7 3 Definitions and abbreviations 7 3.1 Definitions 7 3.2 Abbreviations . 8 4 Registration Services 8 5 Bandwidth Management Services 9 5.1 Base station bandwidth management 9 5.2 Mobile station bandwidth management 9 5.3 Power manageme
7、nt . 9 6 Transport Services 9 6.1 Architecture 9 6.2 Transport protocol suite . 10 6.2.1 Unacknowledged downlink . 10 6.2.2 Unacknowledged uplink . 11 6.2.3 Acknowledged protocols 11 6.2.3.1 Acknowledged Transfers, Best-effort QOS . 11 6.2.3.2 Acknowledged Transfers, Reserved QOS . 11 7 Service Prim
8、itives 12 7.1 7.1.1 7.1.2 7.1.3 7.1.4 7.1.5 7.1.6 7.1.7 7.1.8 7.1.9 7.1.10 7.1.11 7.1.12 7.1.13 7.1.14 7.2 7.2.1 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.2.10 7.2.1 1 7.2.12 7.2.13 Primitive Definitions 12 MAC-transferrequest 12 MAC-transfer-confirm . 12 MAC-transfer-indication . 12 MAC-cre
9、ate-protocol-request . 13 MACcreate-protocolconfirm 13 MACdelete-protocolrequest . 13 MAC-delete-protocol-confirm . 13 MACconfigure-scheduling-request 14 MAC-configure-scheduling-confirm 14 MAC-queue-empty-notify-request 14 MAC-queue-empty-notify-confirm . 14 MAC-service-request 15 MAC-service-confi
10、rm . 15 MAC-service-indication 15 Parameter Definitions . 15 basestation-ID 15 ack-transfer-receipt-ack . 15 ack-transfer-result . 15 configurescheduling-result . 16 createjrotocol-result 16 deletejrotocol-result 16 LPDU 16 MS-handle 16 newschedulingstate . 16 protocol-instance-ID . 16 protocoljaram
11、eters . 16 protocol-type 17 queue-empty-result 17 ETSI 4 ETSI TS 1 O1 659 V1.2.1 (2000-04) 7.2.14 service-result 17 7.2.15 servicestatus 17 7.2.16 unack-transfer-receipt-ack . 17 History 18 ETSI 5 ETSI TS 1 O1 659 V1.2.1 (2000-04) Intellectual Property Rights IPRs essential or potentially essential
12、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 SR O00 3 14: “Intellectual Propero Rights (IPRs); Essential, or potentially Essential, IPRs notifed to ETSI
13、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 Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the exis
14、tence 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 Specification (TS) has been produced by ETSI Project Terrestrial Trunked Radio (TETRA). The present document is one
15、 of the three documents specifying the requirements for TETRA Digital Advanced Wireless Service (DAWS): - TS 101 658: Logical Link Control (LLC) Service Description; - - TS 101 659: Medium Access Control (MAC) Service Description; TS 101 660: Physical Layer (PHY) Service Description. An overview of
16、the requirements for DAWS can be found in TR 101 156 i. Introduction The DAWS protocol architecture is provided in i. The Medium Access Controller (MAC) provides services to the Logical Link Controller (LLC) and requests services from the Physical layer (PHY). The present document describes the serv
17、ices 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 MSMAC will be used when a requirement applies only to the BS or MS MAC layers, respectively. As shown in figure 1, the LLC access
18、es MAC services via service access points (SAPS) A and B. MAC-SAP-A is for data transfer service primitives and MAC-SAPB is for local control and status service primitives. ETSI 6 ETSI TS 1 O1 659 V1.2.1 (2000-04) LLC LAYER MAC-SAP-A MACSAP-B I- V - PHY-SAP-A PHY LAYER PHYSAP-B Figure 1 : DAWS MAC A
19、rchitecture The MAC accesses PHY services via service access points A and B. PHY-SAPA 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 tr
20、ansport. Requirements for each of these services are provided in clauses 4,5, and 6. Service primitives and associated service data units are provided in clause 7. ETSI 7 ETSI TS 1 O1 659 V1.2.1 (2000-04) 1 Scope The present document specifies the service requirements for the Digital Advanced Wirele
21、ss Service (DAWS) Medium Access Control (MAC) layer. The present document provides a conceptual architecture useful for specifying service requirements but is not intended to imply a particular implementation. The present document contains preliminary MAC protocol requirements which will be moved in
22、to the formal MAC protocol specification document (Part 5) when it is drafted. 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 numb
23、er, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, 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 ETSI TR 1
24、0 1 156: “Terrestrial Trunked Radio (TETRA); Technical requirements specification for Digital Advanced Wireless Service (DAWS)“. ETSI TS 101 660: “Terrestrial Trunked Radio (TETRA); Digital Advanced Wireless Service (DAWS); Physical Layer (PHY) service description“. Pl 3 3.1 Definitions and abbrevia
25、tions Definitions For the purposes of the present document, the following terms and definitions apply: base station: piece of equipment providing simultaneous, bi-directional network access to mobile stations block: fixed-length sequence of bytes from a MAC PDU contention-free: physical layer access
26、 method in which there is no possibility that two or more correctly operating mobile stations will transmit simultaneously in a manner which leads to mutually destructive interference between the transmissions contention-possible: physical layer access method in which there exists the possibility th
27、at two or more correctly operating mobile stations will transmit simultaneously in a manner which leads to mutually destructive interference between the transmissions contention-reduced: contention-possible physical layer access method designed to have reduced possibility of mutually destructive int
28、erference between two or more correctly operating mobile stations downlink general term meaning “from the base station to the mobile station“ frame: time period consisting of an integral number of slots between base station broadcasts specifying mobile station bandwidth assignments mobile station: p
29、iece of equipment able to create and consume data but only having network access via a base station protocol data unit: set of parameters and/or data passed from peer to peer by a protocol primitive ETSI 8 ETSI TS 1 O1 659 V1.2.1 (2000-04) protocol instance: two protocol processes which exchange mes
30、sages 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 further
31、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 and/or data passed between adjacent layers by a service primitive service primitive: request, response, or informative message sent between adjacent
32、layers slot: minimum time period reserved for transmission by a single mobile station on a single frequency 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
33、 the present document, the following abbreviations apply: ACK ARQ BE BS CL DAWS DL DQOS IP LLC MAC MACBWM MAC-REG MAC-TPT 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 Services Downl
34、ink Data Integrity Quality Of Service Internet Protocol Logical Link Controller Medium Access Controller 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 Pro
35、tocol Data Unit Physical Layer Quality Of Service Resource Reservation Protocol Service Access Point Service Data Unit Timing Quality Of Service Unacknowledged Uplink 4 Registration Services The MAC registration service (MAC-REG) is responsible for interacting with the PHY layer to maintain the high
36、est possible signal quality for the current serving cell, as well as performing adjacent cell scans when requested by LLC-REG. This section will be expanded after a DAWS PHY layer is defined. ETSI 9 ETSI TS 1 O1 659 V1.2.1 (2000-04) 5 Bandwidth Management Services The MAC bandwidth management servic
37、e (MACBWM) is responsible for allocating bandwidth over the physical medium for MS in full-power and power-saving modes of operation. 5.1 Base station bandwidth management BSMACBWM shall allocate bandwidth on a per-flow basis. BSMACBWM shall consider the current state of all flow input queues and Qo
38、S contracts, and then shall dynamically allocate a portion of available free bandwidth to each flow. During frame N, BSMACBWM shall prepare and send to the PHY layer a PHY-configure-sysinfo-request primitive 2 containing slot assignments for frame N+2. PHY-LNK will send the system information PDU as
39、sociated with PHY-configure-sysinfo-request to all MS in the cell during slot O of frame N+ 1. The MS will then have an entire frame to prepare for activity during frame N + 2. BSMACBWM shall share bandwidth allocation information with BSMAC-TPT. BSMAC-TPT shall issue PHY-transferrequest primitives
40、to supply the BSPHY layer with downlink PDUs. 5.2 Mobile station bandwidth management MSMACBWM shall convey the current state of flow input queues to BSMACBWM so that BSMACBWM can allocate bandwidth effectively for the flows. MSMACBWM shall share bandwidth allocation information with MSMAC-TPT. MSMA
41、C-TPT shall issue PHY-transferrequest primitives to supply the MSPHY layer with uplink PDUs. 5.3 Power management MAC-BWM shall support a power conservation 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 res
42、ume 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 MPDU from an MS operating in full-power mode, except that the downlink and uplink MPDU transfer establishment latency shall be longer. 6 Transp
43、ort Services The MAC transport service (MAC-TPT) is responsible for the transfer of MPDUs over the physical medium. This clause discusses the architecture of MAC-TPT, provides requirements for the protocols in the MAC-TPT protocol suite, and describes MAC-TPT error handling. 6.1 Architecture As show
44、n in figures 2 and 3, MAC-TPT is composed of a suite of six separate protocols: UNACK-DL: unacknowledged downlink; UNACK-UL: unacknowledged uplink; ACK-BE-DL: acknowledged downlink, best-effort QoS; ACK-BE-UL: acknowledged uplink, best-effort QoS; ACK-RS-DL: acknowledged downlink, reserved QoS; ACK-
45、RS-UL: acknowledged uplink, reserved QoS. ETSI 10 ETSI TS 1 O1 659 V1.2.1 (2000-04) 3s MAC TRANSPORT O SERVICE (BS-MAC-TPT) O O Unacknowledged pq ,-1-1 Best-Effort O O O I I I Reserved O O O O ACK-RS-UL Figure 2: BS-MAC Transport Service Architecture MAC-TPT shall create and maintain a pair of proto
46、col instances, UNACK-DL and UNACK-UL, upon power-up. BSMAC-TPT shall contain one pair of protocol processes, UNACK-BE-DL and UNACK-BE-UL, for each MS registered with the BS. These protocol processes manage the transfer of PDUs with best-effort QoS. These protocol processes shall be created upon MS r
47、egistration and destroyed upon MS de-registration. MSMAC-TPT shall contain only one pair of these protocols, as shown in figure 3. MS-MAC TRANSPORT SERVI CE (MS-M AC-TPT) I Unacknowledged I ipq I Reserved O O O O ACK-RS-UL Figure 3: MS-MAC Transport Service Architecture BSMAC-TPT shall contain multi
48、ple dynamically expanding and contracting sets of protocol processes handling downlink and uplink traffic with reserved QoS, one set for each registered MS. These processes shall be created and destroyed dynamically in response to requests issued by LLC-TPT. MS-MAC-TPT shall contain only one set pro
49、tocol processes managing reserved QoS. MAC-TPT is not required to support “direct-mode MPDU transfers, Le. 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-TPT not preclude the addition of a direct-mode protocol at a later date. 6.2 Transport protocol suite This subclauses describes the six protocols in the MAC-TPT protocol suite in more detail. 6.2.1 Unacknowledged downlink UNACK-DL shall utilize a contention-free PHY access method available via PHY-SAPA. A BS shall use UNACK
