1、ETSI TR I01 987 1.1.1 (2001-08) Technical Report Terrestial Trunked Radio (TETRA); Proposed Air Interface Enhancements for TETRA Release 2; Analysis and Feasibility Assessment 2 ETSI TR 101 987 V1.l.l (2001-08) Reference DTWTETRA-02062 Keywords TETRA, air interface, radio ETSI 650 Route des Lucioles
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6、e 2001. All rights reserved. ETSI 3 ETSI TR 101 987 V1.l.l (2001-08) Contents Intellectual Property Rights 5 Foreword 5 1 Scope 6 2 References 6 3 Abbreviations . 6 4 Executive Summary 8 4.1 General Overview . 8 4.2 Conclusions and Recommendation 8 5 Work Areas 9 5.1 5.2 5.2.1 5.2.2 5.2.2.1 5.2.2.2
7、5.2.2.3 5.2.2.4 5.2.3 5.2.3.1 5.2.3.2 5.2.3.3 5.2.4 5.2.4.1 5.2.4.2 5.2.4.3 5.3 5.3.1 5.3.2 5.3.2.1 5.3.2.2 5.3.3 5.3.3.1 5.3.3.2 5.3.3.3 5.3.4 5.3.4.1 5.3.4.2 5.3.4.3 5.3.4.4 5.3.4.5 5.3.4.6 5.3.4.7 5.3.5 5.3.5.1 5.3.5.2 5.4 5.4.1 5.4.1.1 5.4.1.2 5.4.1.3 5.4.1.4 5.4.1.5 5.4.2 General . 9 Improving
8、spectrum efficiency. capacity. and system performance . 9 General 9 Improved Handover . 9 Background 9 No Standard Changes 11 Minor Standard Changes . 12 Major Standard Changes . 13 Hierarchical Cell Structures 15 Introduction 15 Macrocells vs . Microcells . 15 Requirements for Hierarchical Cell Str
9、uctures . 16 Frequency Hopping and Fractional Loading . 16 Introduction 16 Benefits of Frequency Hopping . 17 The way forward 18 Improving terminal characteristics . 19 General 19 Improved Battery Life . Energy Economy Mode . 19 Introduction 19 Performance of First Generation Handsets . 19 Improved
10、Battery Life . Discontinuous Transmission . 20 Introduction 20 Performance of First Generation Handsets . 20 Additional Standardization Work 21 Improved Battery Life . Open and Closed Loop Power Control . 22 General . 22 Methodology 22 Reduced Power Control Step Size (Open Loop) 22 Increased Power C
11、ontrol Dynamic Range (Open Loop) . 23 Closed Loop Power Control Rate 24 RF Characteristics 24 Changing From Open to Closed Loop . 23 Closed Loop in a Fast Rayleigh Fade Environment 24 General . 24 Power mask 24 Optimization of frame structures Essential, orpotentially Essential, IPRs notjed to ETSI
12、in respect OfETSIstandards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (htt:/!wvw.etsi ordj r). 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 existen
13、ce of other IPRs not referenced in ETSI SR O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Project Terrestrial Trunked Radio (TETRA). ETSI 6 ETSI TR 101 987 V1.l.l (
14、2001-08) 1 Scope The present document analyses and provides recommendations regarding Air Interface enhancements that have been proposed for TETRA Release 2. The target audience is EPT, and the purpose is to enable informed decisions to be made by EPT regarding prioritization and feasibility of AI e
15、nhancement standardization work, and workload division between WG2, WG3, and other WGs as applicable. The TETRA air interface has been designed to meet the special requirements of TETRA and as such it is more effective and efficient at meeting these requirements than other radio systems. However it
16、is necessary that TETRA should continue to evolve in line with technology enhancements so that it remains a class-leading technology. There are many potential enhancements which could be added to the TETRA air interface, and it is necessary for the TETRA community to evaluate which combination of th
17、ese best meets the needs of TETRA whilst not requiring excessive standardization effort. A number of proposed enhancements have been considered, resulting in this technical report. Effort has been made, during the analysis and feasibility assessment work, to consider a maximum number of proposed enh
18、ancements which have been put forth in relevant forums regarding TETRA Release 2. 2 Re fe re nces For the purposes of this Technical Report (TR), the following references apply: il ETSI EN 300 392-2 (V2.3.2): “Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface (AI)“. 3 A
19、bbreviations For the purposes of the present document, the following abbreviations apply: AACH AI AoA ASCCH AVL BER BNCH BS BSCH CB cc C/I CHAP CLCH CMCE CODEC DC DTX EIRP EL EPT ERC ES FCC FCS FEC FER FH FRH E-OTD Access Assignment CHannel Air Interface Angle of Arrival Assigned Secondary Control C
20、Hannel Automatic Vehicle Location Bit Error rate Broadcast Network CHannel Base Station Broadcast Synchronization CHannel Control uplink Burst Call Control Carrier to Interference ratio Challenge Handshake Authentication Protocol Common Linearization CHannel Circuit Mode Control Entity COdedDECoder
21、Direct Current Discontinuous Transmission Equivalent Isotropic Radiated Power Event Label Enhanced Observed Time Difference ETSI Project TETRA European Radio Committee Enhanced Services Federal Communications Commission Frame Check Sequence Forward Error Correction Frame Erasure rate Frequency Hoppi
22、ng Fast Reselection Hysteresis ETSI 7 ETSI TR 101 987 V1.l.l (2001-08) FRT GPS GSM HCS HGO ID IOP IP LA LCS LDS LIF LLC LMU MAC MCCH MM MOU MS NUB OTAR OTD PA PDCH PDO PDU PTT RF RS S RSSI RTD RTT Rx SACH SAP SCWHD SDS S/N SNDCP SRH SRT ss SSI STCH STF SwMI TA TCH TDMA TETRA TIP TMA-SAP TMO TOA TX U
23、MTS V+D VAD WG QOS TL-SDU TM-SDU Fast Reselection Threshold Global Positioning System Global System for Mobile communications Hierarchical Cell Structures HanG Over IDentity Interoperability Internet Protocol Location Area Location Service Location Dependant Service Location Interoperability Forum L
24、ogical Link Control (TETRA L2) Location Management Unit Medium Access Control (TETRA L2) Main Control CHannel Mobility Management Memorandum of Understanding Mobile Station Normal Uplink Burst Over The Air Re-keying Observed Time Difference Power Amplifier Packet Data CHannel Packet Data Optimized P
25、rotocol Data Unit Press To Talk Quality of Service Radio Frequency Received Signal Strength Received Signal Strength Indicator Round Time Delay Round Time Trip Receive(r) Slow Access CHannel Service Access Point Signalling CHanneYHalf slot Downlink Short Data Service Signal to Noise Sub-Network Depe
26、ndent Convergence Protocol Slow Reselection Hysteresis Slow Reselection Threshold Supplementary Service Short Subscriber Identity STealing CHannel Specialist Task Force Switching and Management Infrastructure Timing Advance Traffic CHannel Time Division Multiple Access TErrestrial Trunked RAdio Tetr
27、a Interoperability Profile SDU from the service user (i.e. MLE) TETRA MAC sub layer A - Service Access Point SDU from the layer above MAC (i.e. LLC) Trunked Mode Operation Time of Arrival Transmit(ter) Universal Mobile Telecommunications System Voice plus Data Voice Activity Detection PT Working Gro
28、up ETSI 8 ETSI TR 101 987 V1.l.l (2001-08) Phase 1 2 3 4 Def i nit i on Significant benefit with little or no standardization effort. Includes TIPS, and enhancements requiring minor changes to standard mainly to clarify implementations. Expected benefits and some standardization costs. Some more stu
29、dy may be needed before consideration. Potential (unestablished) benefits, unknown standardization or implementation costs. Significantly more study may be needed before consideration. 4.1 Executive Summary General Overview TG23 was formed as a joint EPT WG2WG3 task group to perform the voluntary fe
30、asibility study work for AI enhancements for TETRA Release 2. Seven meetings were held between November 2000 and June 2001, with participation from at least ten different member organizations. Additionally, TETRA Release 2 user requirements input was solicited by liaison statement from WG1 and TETRA
31、 MOU WG ES, with ES providing input on Extended Range and Location Services. The WG1 user requirements survey results were not available in time to be incorporated into the present document, but it is expected those results will be considered in time by the WGs and by the EPT Management Committee. T
32、he AI enhancement options are organized into “enhancement packages“ according to their interdependence in producing a potential benefit to the TETRA Release 2 AI. Based on these enhancement packages, four corresponding sub-areas of TG23 were formed, with the following issues and leaders: 1) Improvin
33、g spectrum efficiency, capacity, and system performance - Dr. Glyn Carter (Dolphin) includes consideration of C/I measurements, Improved power control, Measurement reporting, Improved handover, Frequency hopping, Fractional loading, Hierarchical cell structures 2) Improving terminal characteristics - Andy Noy (Dolphin) includes consideration of Improved power control, Improved handover, Discontinuous TX. 3) Optimization of frame structures for handset based solutions, 50 m for 67 % of calls, 150 m for 95 % of calls. ETSI
