1、 ETSI TR 102 565 V1.1.1 (2007-02)Technical Report Fixed Radio Systems (FRS);Point-to-point systems;Requirements and bit rates of PtP Fixed Radio Systemswith packet data interfaces,effects of flexible system parameters,use of mixed interfaces and implications on IP/ATM networksETSI ETSI TR 102 565 V1
2、.1.1 (2007-02) 2 Reference DTR/TM-04147 Keywords ATM, DFRS, FWA, IP, PDH, Point-to-Point, SDH ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfec
3、ture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such ver
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6、rt.asp 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. European Telecommunications Standards Institute 2007. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Mar
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8、V1.1.1 (2007-02) 3 Contents Intellectual Property Rights5 Foreword.5 1 Scope 6 2 References 6 3 Definitions and abbreviations.7 3.1 Definitions7 3.2 Abbreviations .7 4 Packet Data in Fixed Radio Systems - the need to update the standard.8 4.1 Transmission of packet data in fixed radio systems .8 4.1
9、.1 Packet data transmission alternatives8 4.1.2 Transmission quality aspects 9 4.1.3 Network interface alternatives 9 4.2 Switching and routing functionality .9 4.3 Flexible system parameters 9 5 Relevant Parameters.10 5.1 Radio Interface Capacity 10 5.1.1 Clarified definition of RIC10 5.1.2 Overvie
10、w of current RIC-limits13 5.2 Bandwidth and Channel Separation .14 5.3 Spectral Efficiency .14 5.4 Equipment spectrum class 15 6 General considerations on criteria and methods for Radio Interface Capacity 15 6.1 Setting guidelines for new RIC-limits 15 6.2 Definition of RIC limits .15 7 Route 1 - Ad
11、dition of dedicated RIC values 16 7.1 Radio requirements for specific RIC values.16 7.2 Evaluation of the radio interface parameters 16 7.2.1 Example 1 (28 MHz channel spacing)16 7.2.1.1 Assumptions16 7.2.2 Other examples .19 7.3 Conclusion and proposals.19 8 Route 2 - Approach for flexible RIC-valu
12、es 20 8.1 Derivation of reasonable symbol rates versus bandwidth 20 8.2 Derivation of maximum radio data rates 22 8.3 Definition of RIC-ranges23 8.4 Application of RIC-ranges .24 8.5 Possible Extension EN 302 217-2-2 annex F .25 9 PtP-systems with mixed-mode system parameters.28 9.1 Benefits of adap
13、tivity .28 9.2 General considerations .29 10 Conclusion and next steps 29 Annex A: RIC-values for Ethernet signal transmission .30 Annex B: Table F.1 from EN 302 217-2-231 Annex C: System details on HiperAccess user data rate evaluation .32 C.1 BRAN HiperAccess .32 C.2 HiperAccess parameters.32 ETSI
14、 ETSI TR 102 565 V1.1.1 (2007-02) 4 C.3 BRAN HiperAccess data rates .33 Annex D: Radio requirements for 23 GHz 34 D.1 Need for new RIC limits 34 D.2 Assumptions.34 D.2.1 Example 1 (28 MHz channel spacing) .35 D.2.2 Example 2 (56 MHz channel spacing) .37 D.2.3 Example 3 (14 MHz channel spacing) .39 D
15、.2.4 Example 4 (7 MHz channel spacing) .40 D.3 Proposed changes to EN 302 217.42 Annex E: Filling the “Gaps“ within a certain class43 Annex F: Mixed-mode operation (Annex F of EN 302 326-1) 47 F.1 Introduction 47 F.2 General description of mixed-mode systems .47 F.3 Historical derivation of transmit
16、 spectrum masks 47 F.4 Rationale for Multipoint transmit masks48 F.4.1 Introduction 48 F.4.2 Irrelevance of ETSI transmit spectrum mask in determining adjacent channel requirement for intra-system planning48 F.4.3 Applicability of the transmit spectrum mask to inter-system planning 48 F.4.4 Minimum
17、traffic capacity imposed by the regulator 49 F.5 Essential requirements for transmitters and receivers operating in mixed-mode.49 F.5.1 Requirements summary49 F.5.2 Transmit spectrum masks for mixed-mode 49 F.5.3 Adjacent channel interference 51 F.5.4 Co-channel interference .51 Annex G: Future Step
18、s.52 G.1 Further discussion items.52 G.2 Future targets for PtP-standardization52 Annex H: Spectral Efficiency and System Threshold .53 History 54 ETSI ETSI TR 102 565 V1.1.1 (2007-02) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declar
19、ed 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 ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which i
20、s available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). 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 existence of other IPRs not re
21、ferenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM). ETSI ETSI TR 102 565 V1.1.1 (2007-02) 6 1
22、Scope Modern digital fixed radio systems extend their capability from a pure transport media towards multiplexing and switching capability, also for packet and cell-based type of user traffic. This type of traffic is no longer solely routed via the well-established PDH and SDH interfaces, but also o
23、n typical data interfaces. Digital modem techniques intend to optimize the link performance by applying sophisticated coding schemes, as well as dynamic adaptation of the modulation. As a consequence, the established set of standards for digital fixed radio systems requires an extension towards pack
24、et data transmission in adaptive modulation modes using systems with incorporated switching and multiplexing, routing or traffic engineering functionalities, use of adaptive modulation/coding for either conventional or packet data systems shall also be considered. Actually, the set of specifications
25、 covered in EN 302 217 v.1.1.3. 1 is based on: assessment of DFRS for transport only without switching, data storage or routing capability; modulation efficiency based on modulation, impact of coding nearly neglected; RIC-values referred to suitable PDH/SDH reference standards, in addition a set of
26、radio interface capacities correlated to these PDH and SDH data rates. The present document intends to clarify the implications of specifying a full set of RIC (Radio Interface Capacity) values and related modulations applicable to existing RF channel plans recommended by CEPT or ITU. This full set
27、of RIC will cover also values for which radio interface parameters cannot be found in existing fixed radio system standards. A proposed set of missing necessary technical requirements will be reported for frequency bands 7 GHz to 55 GHz and for spectral efficiency classes 2 to 5. Compliance of adapt
28、ive modulation with existing requirements will also be considered. Additionally possibilities for commonality with multipoint systems e.g. ETSI BRAN HiperAccess bit rates and flexible system features as well as aspects of multiple or mixed network interfaces will be analysed. As a prerequisite for t
29、he full set of RIC, an updated definition of the term “Radio Interface Capacity“ has to be established, which would consider the extended capability of a fixed radio system towards switching, storage, routing and multiplexing. Also the definition of spectrum classes has to be reviewed in order to co
30、pe with modern modulation and coding techniques. In order to establish a consisted set of requirements, the modulation efficiency should be considered as the appropriate measure for the spectrum classes. 2 References For the purposes of this Technical Report (TR), the following references apply: NOT
31、E: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. A more comprehensive list of references is available in EN 302 217-1 1. 1 ETSI EN 302 217 series: “Fixed Radio Systems; Characteristics and requirements for point-to-
32、point equipment and antennas“. 2 ETSI EN 302 326-1: “Fixed Radio Systems; Multipoint Equipment and Antennas; Part 1: Overview and Requirements for Digital Multipoint Radio Systems“. 3 ETSI EN 301 785 (V1.2.1): “Fixed Radio Systems; Point-to-point packet data equipment; Parameters for radio systems w
33、ith packet data interfaces for transmission of digital signals operating in the frequency range 7, 8, 13, 15, 18, 23, 26, 28, 32, 38, 52 to 55 GHz“. ETSI ETSI TR 102 565 V1.1.1 (2007-02) 7 4 ETSI TS 101 999: “Broadband Radio Access Networks (BRAN); HIPERACCESS; PHY protocol specification“. 5 ITU-T R
34、ecommendation I.356: “B-ISDN ATM layer cell transfer performance“. 6 ITU-T Recommendation I.357: “B-ISDN semi-permanent connection availability“. 7 IEEE 802.3 (part 3): “Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications“. 8 ITU-T Recomme
35、ndation Y.1541: “New Appendix X - An example showing how to calculate IPDV across multiple sections“. 9 ITU-T Recommendation Y.1540: “Internet protocol data communication service - IP packet transfer and availability performance parameters“. 10 T/R 13-01: “Preferred channel arrangements for fixed se
36、rvices in the range 1-3 GHz“. 11 ETSI EN 302 326-2: “Fixed Radio Systems; Multipoint Equipment and Antennas; Part 2: Harmonized EN covering the essential requirements of article 3.2 of the R the data stream of a specific port is not automatically designated for transmission via the radio link, but c
37、an also be routed and multiplexed to other baseband ports at the same side of the radio link; the internal baseband processing can also contain queuing or storage mechanisms. Consequently the instantaneous data rate at one or more baseband interface ports is no more directly correlated with the data
38、 rate via the radio link. Therefore an updated definition of the Radio Interface Capacity is required. 4.3 Flexible system parameters The radio system may select, adaptively or not, from different modulations/coding alternatives and/or from several coding alternatives in order to: cope with variatio
39、ns in input user data; adapt to propagation and interference conditions on the radio link and to dynamic variations of user data: - PtP-radio link which transmits normally using the highest system mode available may switch to lower modes if propagation conditions get worse due to rain or multipath f
40、ading or in case of temporary interference situations. Some part of the traffic would be lost but the availability of the remaining traffic would be higher. The interest of this mode is to allow continuing to transmit at lower bit rates in time periods which would be fully unavailable for convention
41、al equipment. - PtP-radio link which transmits normally using some lower mode may increase temporarily transmission capacity by switching to higher modes to offer transmission channel for traffic with lower availability requirements. This mode is particularly adapted to the transmission of data with
42、 different priority levels, as will happen in the packet data world. ETSI ETSI TR 102 565 V1.1.1 (2007-02) 105 Relevant Parameters 5.1 Radio Interface Capacity 5.1.1 Clarified definition of RIC The definition of RIC as contained in EN 302 217-1 1 shall be updated as follows: radio interface capacity
43、 (RIC): net capacity defined at Z/Z reference points that can be transmitted over the radio interface defined at reference point C NOTE: RIC includes additional capacity added for framing and multiplexing/demultiplexing different baseband signals (at X/X points) into a transport module, eventually i
44、ntegrated in the baseband processing of the radio system, virtually defined at the Z/Z reference points. It does not include other additional proprietary algorithms and signals used for specific radio systems purposes not intended for customer use (typically error correction codes and radio system s
45、ervice channels). ETSI ETSI TR 102 565 V1.1.1 (2007-02) 11 Figure 1: System Block Diagram from EN 302 217-1 (figure 1) ETSI ETSI TR 102 565 V1.1.1 (2007-02) 12The definition of the RIC at the reference points Z/Z is still valid also for systems with sophisticated capability of the module “payload pr
46、ocessing“. Figure 2 shows the flow of data stream laid over the system block diagram. RICSymbol RateBufferintr.CTRLFECModemFECX/X Z/Z E/EFECext.CTRLMCUmixedtrafficwaysidetrafficGrossBit RateFigure 2: Schematic signal flow The correlation between the data rates at X/X, at Z/Z and the symbol rate at E
47、/E cannot be derived in a straight and generalized approach: due to the switching/routing capability, only a portion of the data stream at interface X/X might be transmitted via the air interface. Other portions of the data stream might directly be routed to other ports X/X; besides PDH or SDH, inte
48、rfaces X/X might also cover all types of packetized data interfaces or partly filled data streams; each data stream might be routed through a buffer for handling low-prioritized or burst data streams; control data e.g. for the MAC are generated for radio system internal purposes, but shall not be in
49、cluded in the RIC; wayside channels are accessible for the user; traffic on those channels belongs therefore to the RIC; traffic data to be transmitted over the radio link and control data will obtain individual forward error correction. The RIC shall be defined as the maximum average data rate at interface Z/Z which the system can transmit. All interfaces X/X and the control interface have to be loaded with the maximum acceptable data rate. The accumulated data rate of all interfaces X/X shall not be the l
