1、 STD-ETSI ETR 300-2-ENGL 1777 W 3400855 0379083 034 PLEASE NOTE This document is normally accompanied by a disk/disks when purchased in hardcopy. The disk/disks contain information which would be of no value as a hardcopy document. If you require a copy of the diskdisks, please use the contact infor
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4、ENGL 1997 - 3400855 037908q T75 M R:; N I CA L REPORT ETR 300-2 May 1997 Source: EP-TETRA Reference: DTWTETRA-01011-2 ICs: 33.020 Key words: TETRA, V+D, voice, data Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Designers guide; Part 2: Radio channels, network protocols and service perfor
5、mance ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat8etsi.fr Tel.: +33 4 92
6、 94 42 O0 - Fax: +33 4 93 65 47 16 Copyright Notification: 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 1997. All rights reserved. STD-ETSI ETR
7、300-2-ENGL 1997 = 3Li00855 0377085 901 = , Page 2 ETR 300-2: May 1997 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Editing and Commit
8、tee Support Dept.“ at the address shown on the title page. STD-ETSI ETR 300-2-ENGL 1777 W 3400855 O17708b 848 Page 3 ETR 300-2: May 1997 Contents Foreword . 7 Introduction 7 1 Scope 9 2 References 9 3 Abbreviations . 9 4 Radio channels performance 10 4.1 Introduction 10 4.2 4.3 Radio channels simula
9、tion description 10 Performance of signalling channels . 4.3.1 AACH 4.3.1.1 4.3.1.2 SCH / HU . 19 4.3.2.1 Ideal synchronization technique . 19 4.3.2.2 SCHIHD. BNCH and STCH . 22 4.3.3.1 Ideal synchronization technique . 22 4.3.3.2 Realistic synchronization technique. 22 4.3.4.1 Ideal synchronization
10、 technique. 22 4.3.4.2 4.3.5.1 Ideal synchronization technique . 25 Ideal synchronization technique . 30 Ideal synchronization technique . 16 Realistic synchronization technique . 18 4.3.2 Realistic synchronization technique . 21 4.3.3 4.3.4 SCH/F 22 Realistic synchronization technique . 25 4.3.5 BS
11、CH 25 Performance of traffic channels . 28 4.4.1 TCH/7. 2 . 30 4.4 4.4.1.1 4.4.1.2 4.4.2.1 4.4.2.2 4.4.3.1 4.4.3.2 TCH/4. 8 N = 8 . 39 4.4.4.1 4.4.4.2 TCH/2. 4 N = 1 . 42 4.4.5.1 4.4.5.2 Realistic synchronization technique . 45 4.4.6.1 Ideal synchronization technique . 45 4.4.6.2 Realistic synchroni
12、za hnique . 48 4.4.7.1 4.4.7.2 Realistic synchronization technique . 33 Ideal synchronization technique . 33 Realistic synchronization technique . 36 Ideal synchronization technique . 36 Realistic synchronization technique . 39 4.4.2 TCH/4. 8 N = 1 . 33 4.4.3 TCH/4, 8 N = 4 36 4.4.4 Ideal synchroniz
13、ation technique . 39 Realistic synchronization technique . 42 Ideal synchronization technique . 42 4.4.5 TCH/2. 4 N = 4 . 45 4.4.7 TCH/2. 4 N = 8 48 4.4.6 Ideal synchronization technique . 48 Realistic synchronization technique . 51 5 Access protocols and service performance of TETRA V+D network 51
14、5.1 Introduction 51 5.2 General description of traffic scenarios . 51 5.2.1 Introduction 51 5.2.2 Reference traffic scenarios . 51 General description of network model . 53 5.3 STD*ETSI ETR 300-2-ENGL 1777 3400855 0177087 784 Page 4 ETR 300-2: May 1997 5.5.2.3 5.5.2.4 5.5.2.5 5.5.3.3 5.5.3.4 5.5.3.5
15、 5.3.1 Introduction . 53 5.3.2 5.3.3 Mobile user . 56 5.3.4 MS 57 5.3.5 General assumptions on communication layers . 54 Switching and Management Infrastructure (SwMI) . 59 5.3.5.2 5.3.5.1 Switching infrastructure . 59 Network data base 60 5.3.6 External network 5.3.7 Radio channels 5.3.7.1 Power le
16、vel of wanted signal . 61 5.3.7.2 Noise power 63 5.3.7.3 Interference power 63 5.3.7.4 Global evaluation . . 63 5.3.7.5 5.3.7.6 Description of evaluated parameters 64 Access protocols and packet data performance . 67 5.5.1 introduction . 67 5.5.2 Scenario 1: Urban and sub-urban PAMR network 67 5.5.2
17、.1 Introduction . 67 5.5.2.2 Simulation assumptions for Scenario 1 . 68 5.5.2.2.1 Simulated traffic scenario . 68 5.5.2.2.2 Simulated network procedures and reference access parameters 69 5.5.2.2.3 Confidence analysis for scenario 1 resu Its . 71 Influence of network data base delays 71 Main control
18、 channel allocation . 79 Transmission on a dedicated timeslot 63 Simultaneous transmissions for random access 64 5.4 5.5 5.5.2.4.1 Single MCCH 79 5.5.2.4.2 Multiple MCCH . 85 Sensitivity to access control parameters and system configuration 87 5.5.2.5.1 5.5.2.5.2 5.5.2.5.3 5.5.2.5.4 5.5.2.5.5 5.5.2.
19、5.6 Refs re nce configura tio n . 87 Influence of random access retry timer 89 Influence of random access maximum number of re-transmissions (Nu) . 94 influence of random access frame Influence of basic link maximum number of re-transmissions . 104 Influence of random access technique109 Scenario 8:
20、 Urban and sub-urban PMR network 114 5.5.3.1 Introduction . 114 5.5.3.2 Simulation assumptions for Scenario 8 . 115 5.5.3.2.1 Simulated traffic scenario . 115 5.5.3.2.2 Simulated network procedures and reference access parameters 116 5.5.3.2.3 Confidence analysis for scenario 8 results . 118 Referen
21、ce configuration for scenario 8 (scenario 8A) 118 Analysis of the system with different traffic profiles 123 5.5.3.4.1 Variation of packet data traffic 123 5.5.3.4.2 Variation of Dispatcher traffic level . 129 5.5.3.4.3 Analysis of different service priorities distributions 136 5.5.3.4.4 Analysis wi
22、th full duplex circuit calls . 143 Sensitivity analysis of network parameters . 147 5.5.3.5.1 Variation of the cell allocated radio resources . 147 5.5.3.5.2 Variation of the maximum hold time in the priority queues 152 Circuit services performance (BER versus probability) . 155 5.6.1 Introduction .
23、 155 length 99 5.5.3 5.6 STD-ETSI ETR 300-2-ENGL 1797 3400855 0377088 bLO M Page 5 ETR 300-2: May 1997 5.6.2 5.6.3 5.6.4 5.6.5 Performance in TU propagation environment . 155 Performance in BU propagation environment . 157 Performance in RA propagation environment . 159 Performance in HT propagation
24、 environment . 162 Annex A: Traffic scenarios for TETRA V+D networks 164 A.l Introduction 164 A.2 Scenarios 164 A.2.1 A.2.2 A.2.3 A.2.4 Scenario n . 1: Urban Part 3: “Direct Mode Operation (DMO)“, (DTWTETRA-O1 O1 1-3); Part 4: “Network management“. Annex A provides details of the traffic scenarios f
25、or TETRA V+D systems. Annex B provides Message Sequence Charts (MSCs) of all the simulated procedures. Annexes C, D and E provide Service Diagrams (SDs) related to the various models. As these diagrams are difficult to read for each diagram a computer file name is provided of the attached electronic
26、 files to this ETR. The diagrams provided in this way allows the reader to use suitable software to browse the computer files. A number of maior contributions have been made by ETSI members in order for this ETR to be comprehensive, and in order that scenario implementations are validated. EPTETRA w
27、ishes to acknowledge the work of these contributions from: - AEG Mobile Communications Gmbh, Ulm, (D); - ASCOM TECH. AG, Maegenwil, (CH); - CSELT S.p.A., Torino, (IT); - Telecom Consultant International Ltd., (UK); - TELEDENMARK, Taastrup, (DK); and - The UK Home Office, London (UK). Introduction Th
28、e design of a mobile radio network is a complex process where many parameters play an important role. The starting point of this process is the estimate of the traffic that is offered to the network. For a single mobile subscriber, the type of required services, the frequency of requests, the durati
29、on and the minimum performance are the common variables that are considered in the estimate. Moreover the number of subscribers and their distribution inside the network allow the estimation of the total amount of traffic. A parallel operation is the investigation of the propagation environment in t
30、he region where the network will be placed. STD-ETSI ETR 300-2-ENGL 1997 3400855 OL9907L LO5 Page 8 ETR 300-2: May 1997 The cell positioning and dimensioning is a crucial step in the design process. More than the amount of the offered traffic and of the propagation environment, an important role is
31、played by the knowledge of how the design choices affect the performance for the offered services. This information is strongly related to the particular radio interface of the mobile radio system. The positioning and dimensioning of network switches and databases close the overall process. As in th
32、e case of radio interface, this operation requires the knowledge about the influence of the design choices on the overall performance. The design process is usually iterative. A final analysis on the whole network allows to check the validity of the process. In case of inadequate result, the process
33、 is repeated. The evaluation of effects of the design choices on the overall network performance is usually performed by simulation (nevertheless, when some network have been deployed, it can be done also through real experiment). This evaluation should allow the designer to determine the radio cove
34、rage and the resource allocation just starting from the target performance for the provided services. Due to the complex structure of a mobile network this operation is usually made by iterations. Starting from the network configuration, the overall performance are evaluated, then the comparison wit
35、h the target performance can lead to accept or to repeat the evaluation with different parameters. STD-ETSI ETR 300-2-ENGL 1797 3900855 0377072 OiL Page 9 ETR 300-2: May 1997 1 Scope The scope of this ETSI Technical Report (ETR) is to be a useful, but not exhaustive, basis to a network designer for
36、the cell planning and radio resource allocation during the design process. This ETR reports the performance of a TErrestrial Trunked RAdio (TETRA) Voice plus Data (V+D) network in some different scenarios. All the presented results have been evaluated through computer simulations by some companies t
37、aking pari in the TETRA standardization bodies. The network users involved in the development of the TETRA standard provided some realistic and significant network scenarios, giving information about the offered traffic. The characterization of radio channels is the first step for the evaluation of
38、performance of both network protocols and quality of provided services. This ETR starts with the description and the illustration of performance of TETRA V+D radio channels, in terms of Bit Error Ratio (BER) and Message Erasure Rate (MER) as function of the Signal-to-Noise Ratio (SNR) and Carrier on
39、 co-channel Interference ratio (CA). This ETR also deals with the performance of network protocols (in terms of delay and throughput) and of provided services (BER for circuit switched services and delay plus throughput for packet switched services). A consequence of the analysis of access protocols
40、 is the evaluation of traffic capacity of control and traffic channels. 2 References For the purposes of this ETR, the following references apply. ETS 300 392-1 : “Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA) system; Voice plus Data; Part 1: General network design“. ETS 30
41、0 392-2: “Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA) system; Voice plus Data; Part 2: Air Interface“. 31 CEC Report COST 207: “Digital Land Mobile Communications“. 3 Abbreviations For the purposes of this ETR, the following abbreviations apply: AACH BER BNCH BSCH BUx C/I
42、 c cc CONP WNO HH HTx LLC MAC MCCH MER MLE MS MSC MT PAMR PDO PDU PMR Access Assign CHannel Bit Error Rate Broadcast Network CHannel Broadcast Synchronization CHannel Bad Urban at x km/h Carrier on co-channel Interference ratio Call Control Connection Oriented Network Protocol Signal on Noise ratio
43、Hand Held Hilly Terrain at x km/h Logical Link Control Medium Access Control Main Control CHannel Message Erasure Rate Mobile Link Entity Mobile Station Message Sequence Chart Mobile Terminal Public Access Mobile Radio Packet Data Optimized Protocol Data Unit Private Mobile Radio STD*ETSI ETR 300-2-
44、ENGL L477 3400855 0397093 T88 M Page 10 ETR 300-2: May 1997 PUEM RAx RES SCH / F SCH / HD SCH / HU SCLNP SDL SDU SwMI TCH/x N=y TCHI/ S TDMA TETRA TUX V+D Probability of Undetected Erroneous Messages Rural Area at x km/h Radio Equipment and Systems Signalling CHannel / Full slot Signalling CHannel /
45、 Half slot Downlink Signalling CHannel / Half slot Uplink Special Connection Less Network Protocol Specification and Description Language Service Data Unit Switching and Mobility Infrastructure Traffic CHannel for x kbit/s and interleaving depth N=y Traffic CHannel / Speech Time Division Multiple Ac
46、cess TErrestrial Trunked RAdio Typical Urban at x km/h Voice plus Data 4 Radio channels performance 4.1 Introduction Performance of TETRA V+D logical radio channels are reported in this clause. They have been evaluated through computer simulations for all the propagation environments that are modell
47、ed in ETS 300 392-2 2, clause 6. Moreover, performance are also reported for some values of the Mobile Station (MS) speed in each propagation environment. Radio channel figures are preceded by the description of the model of radio channels and of the assumptions that have been considered for simulat
48、ions. Then, for each channel, performance figures are grouped and showed in the following order: - comparison among different propagation environments with one value of MS speed per environment; - performance sensitivity to the MS speed in TU propagation environment; - performance sensitivity to the
49、 MS speed in BU propagation environment; - performance sensitivity to the MS speed in RA propagation environment; - performance sensitivity to the MS speed in HT propagation environment. Due to the different possibilities in the model of the radio receiver, two groups of simulations have been carried out: 1) the first with ideal synchronization technique; and 2) the second with a particular implementation of the synchronization block. In this ETR performance figures are distinguished in two subclauses for each channel and scenario Figures that are reported in this c
