1、 ETSI TR 103 103 V1.1.1 (2012-09) Fixed Radio Systems; Point-to-point systems; ATPC, RTPC, Adaptive Modulation (mixed-mode) and Bandwidth Adaptive functionalities; Technical background and impact on deployment, link design and coordination Technical Report ETSI ETSI TR 103 103 V1.1.1 (2012-09) 2Refe
2、rence DTR/ATTM-04024 Keywords adaption, DFRS, point-to-point, modulation 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-Prfecture de Grasse (06) N
3、 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 versions, the reference
4、version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of
5、 status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Noti
6、fication 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 2012. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of E
7、TSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 103 103 V1.1.1 (2012-09) 3Contents I
8、ntellectual Property Rights 4g3Foreword . 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions, symbols and abbreviations . 6g33.1 Definitions 6g33.2 Symbols 6g33.3 Abbreviations . 6g34 Impact of power control (ATPC and/or RTPC), mixed-mode and band
9、width adaptive operation on spectrum mask and link design requirements 7g34.1 ATPC and RTPC implementation background 7g34.1.1 RTPC Impact 8g34.1.2 ATPC impact 9g34.1.2.1 ATPC not required as licensing/coordination conditions 9g34.1.2.1.1 Use in bands where conventional coordination is applied . 9g3
10、4.1.2.1.2 Use in bands where no coordination or simpler self-coordination is applied 10g34.1.2.2 ATPC required as licensing/coordination conditions 11g34.2 Mixed-mode operation impact . 11g34.2.1 Basic concepts 11g34.2.2 Link availability 12g34.2.3 Link fade margin . 13g34.2.4 ATPC range 14g34.3 Ban
11、dwidth adaptive operation impact 18g34.3.1 Basic concepts 18g34.3.2 Bandwidth (channel) occupancy . 18g34.3.3 Link availability and fade margin . 18g34.3.4 ATPC range 18g35 Impact on frequency co-ordination 19g36 Impact on Article 3.2 “essential“ parameters and operating conditions . 20g3History 22g
12、3ETSI ETSI TR 103 103 V1.1.1 (2012-09) 4Intellectual Property Rights IPRs essential or potentially essential 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
13、 ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, n
14、o investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced 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
15、 Report (TR) has been produced by ETSI Technical Committee Access, Terminals, Transmission and Multiplexing (ATTM). ETSI ETSI TR 103 103 V1.1.1 (2012-09) 51 Scope The present document aims to facilitate the correct understanding of the use of the following functionalities widely used in point-to-poi
16、nt fixed radio systems in the context of network coordination with a view to R Characteristics and requirements for point-to-point equipment and antennas; Part 1: Overview and system-independent common characteristics“. i.4 ETSI EN 302 217-2-1 (V1.3.1): “Fixed Radio Systems; Characteristics and requ
17、irements for point-to-point equipment and antennas; Part 2-1: System-dependent requirements for digital systems operating in frequency bands where frequency co-ordination is applied“. ETSI ETSI TR 103 103 V1.1.1 (2012-09) 6i.5 ETSI EN 302 217-2-2: “Fixed Radio Systems; Characteristics and requiremen
18、ts for point-to-point equipment and antennas; Part 2-2: Digital systems operating in frequency bands where frequency co-ordination is applied; Harmonized EN covering the essential requirements of Article 3.2 of the R Characteristics and requirements for point-to-point equipment and antennas; Part 3:
19、 Equipment operating in frequency bands where both frequency coordinated or uncoordinated deployment might be applied; Harmonized EN covering the essential requirements of Article 3.2 of the R Multipoint Equipment and Antennas; Part 2: Harmonized EN covering the essential requirements of Article 3.2
20、 of the R therefore it is the supplier that should declare how the available range of attenuation should be subdivided (and possibly limited) in order to meet the normative conditions contained in the relevant ETSI Harmonized Standards and/or in other regulatory limits eventually defined by administ
21、rations in the licensing conditions. Those conditions are summarized below. It is important to understand that the total available range of attenuation is, in general, subdivided in two sub-ranges, which, in principle, are independent from any “labelling“ as RTPC or ATPC ranges: “Initial“ Sub-range
22、where the required spectrum mask is still fulfilled; “Final“ Sub-range where the required spectrum mask is no longer fulfilled. The ATPC sub-range may be used within two possible scenarios synthesised by table 1. Table 1: ATPC operating modes versus licensing conditions Coordination/licensing condit
23、ions Effect on network Operational needs No ATPC is imposed but the user(s), under his (their) responsibility, apply an ATPC reduction in a homogeneous area for general improvement of the interference situation. Interference impact on performance and availability is still evaluated with power at nom
24、inal level (no ATPC attenuation is considered in the coordination process); therefore: No improvement in the network density. The user under his own responsibility might obtain additional margin against the calculated performance and availability objectives. No need for fulfilling the spectrum mask
25、(and NFD) in the ATPC range, which can indifferently use “initial“ and/or “final“ sub-ranges of attenuation. ATPC is imposed as pre-condition of coordination/licensing (note 1). Interference impact on performance and availability is evaluated with power reduced by an ATPC range; therefore: Improveme
26、nt in the network density could be obtained (note 2). No additional margin against the calculated performance and availability objectives (note 3). Need for fulfilling the spectrum mask (and NFD) in the assumed ATPC range, which is supposed to remain within “initial“ sub-range of attenuation. NOTE 1
27、: The ATPC range is link-by-link dependent, it is usually determined in order to fix the maximum RSL permitted during unfaded periods. NOTE 2: In general the use of ATPC pre-condition is possible for new links in a network; if existing links in already dense networks were coordinated without any ATP
28、C, the possible density improvement might be severely reduced. NOTE 3: However, in principle and if possible and practical, improvement might still be obtained using the residual ATPC attenuation, under operator responsibility. ETSI ETSI TR 103 103 V1.1.1 (2012-09) 8Therefore, from the point of view
29、 of equipment use in the network, the RTPC and ATPC “labelling“ of the available attenuation range is, in principle, different for the two cases considered in table 1; figure 1 summarises this aspect (see note). NOTE: The use of ATPC in the license conditions is foreseen in some countries on nationa
30、l basis; in addition, the implementation of ATPC functionality is left, as an option, to manufacturer choice. Therefore, the ATPC assessment for specific licensing conditions is not retained “essential“ for R it identifies the relevant power levels and their relationship with the transmitter power d
31、ensity spectrum mask as required by EN 302 217-2-2 i.5 (see note 1) in relation to the Article 3.2 of R therefore, it is not considered to be an essential requirement in accordance with the R more stringent spectrum usage scenarios (see next clause 4.2.1.2) are left to voluntary implementation of th
32、e manufacturer. In figure 2 different power levels, possible during ATPC operation, are identified as follows: Maximum Nominal Power (ATPC operating): This is coincident with the EIRP defined in the coordination process for the required link availability (excluding the antenna gain). Minimum Power (
33、ATPC operating): This is the lower power reached in unfaded (clear sky) propagation conditions. This level is defined on the basis of a minimum receiver signal level (RSL) guaranteeing stable “error free conditions“ (including safeguard allowance for tolerances in both TX power setting and RX RSL de
34、tection). Intermediate Power (ATPC operating): Any intermediate power condition adapted to the instantaneous propagation condition. Maximum available power (ATPC overdrive): This is mentioned only for due background information of the technical capability of an ATPC system in a network; however, the
35、 applicability and the benefits of this “overdrive“ feature in a multi-operator network are doubtful. It might be considered, with care, only when a single operator can be responsible for all mutually interfering links in a certain area and can actively monitor the network for possible unacceptable
36、interference between links using this feature. Rationale is that this higher power might be provided by the equipment when the nominal power defined by the coordination process is lower than the equipment capability; in principle, this extra power might be activated by the ATPC system when the RSL b
37、ecomes even lower than the BER threshold used for the required availability. This, still in principle, should happen for less than the unavailability time used for the network coordination (e.g. less than 0,01 % of the time if availability of 99,99 % is sought); therefore, the potential interference
38、 power increase towards other links in the area should happen only for a time percentage lower than their nominal unavailability. However, a number of practical considerations (e.g. activation threshold should be somehow higher than BER threshold for an “error free“ operation, significant tolerance
39、in detecting very low RSL, etc.) suggest that the actual activation time could become sensibly higher than ideal and the impact on other links nearby might no longer be negligible. Therefore, the applicability and benefit of this “overdrive“ feature in a multi-operator network are considered unpract
40、ical. The Rationale for the requirement related to respecting or not the spectrum mask (see note 2) is that while the mask is a “relative attenuation“, the actual interference potential is given by the absolute power spill-over into adjacent channels. Therefore the NFD should be guaranteed when tran
41、smitters operate at maximum nominal power or in the overdrive region (i.e. when maximum absolute power is produced in adjacent channels), which are the conditions commonly used for frequency planning. In all lower power conditions, even where the NFD may be degraded by the (apparent) increase of the
42、 noise floor (due to the actual drop in carrier power), resulting in the mask level being exceeded (see figure 2), however the absolute interference power on adjacent channels will in any case be equal to or less than that used for planning (i.e. the planned C/I on adjacent channels will not be exce
43、eded). NOTE 2: In practice (see clause 4.2.2.1.1), if licensing conditions permits a limited EIRP increase for short periods, only the ATPC operating in the range between “maximum nominal power“ and “maximum available power“, including the relevant attenuation introduced by the RTPC function (if any
44、) for setting the licensed level of EIRP, is relevant for maintaining the spectral emission within the mask and consequently the NFD. ETSI ETSI TR 103 103 V1.1.1 (2012-09) 10Max available power (ATPC overdrive) Max nominal power(ATPC operating) Minimum power (ATPC operating)Mask to be met only in th
45、e range “maximum nominal” to “maximum available” power (if overdrive power is permitted Mask possibly not met in the range from “maximum nominal” to “minimum” power Intermediate levels (ATPC operating) ATPC “down range” Extra power exceeding the EIRP used for the link coordination Figure 2: Relation
46、ship between spectrum mask requirement and ATPC operation (ATPC not required by licensing conditions) However, it has to be considered that, besides the inter-system operation guaranteed by the above behaviour of the equipment, there is an intra-system constraints for maintaining a suitable RBER tha
47、t should be taken into account in the system design; under ATPC operation, the “noise floor“ of the emission should remain sufficiently low for maintaining a signal to noise ratio (S/N) suitable for RBER fulfilment. That S/N would depend on the proprietary implementation; however, a conservative ind
48、ication may be drawn assuming that the ratio between the in-band power density and the noise density (“transmitter S/N“) should be: )RSLBER10-(RSLRBERC/I1dB) Cochannel(dB) S/Nr Transmitte-6+ Where: Cochannel C/I1dB is defined in clause 4.2.3 and specified in relevant annexes. The factor (RSLRBER - R
49、SLBER10-6) is defined as 10 dB in clause 6.5.1 of EN 302 217-2-1 i.4. 4.1.2.1.2 Use in bands where no coordination or simpler self-coordination is applied Besides the conventional use of ATPC for improving the network density and/or link quality described in previous clauses, a further use for ATPC, in bands where no coordination is applied or simpler procedures implying self-coordination under users responsibility (sometime called light licensing) is required, is identified in EN 302 217-3 i.6. In this case the ETSI EN autonomously pose
