1、ETS I TS 1 O 1 948 VI .I .2 (2003-04) Technical Specificafion Digital Enhanced Cordless Telecommunications (DECT); DECT derivative for implementation in the 2,45 GHz ISM Band (DECT-ISM) 2 ETSI TS 1 O1 948 VI .I .2 (2003-04) Reference RTS/DECT-000216 Keywords DECT, ISM, radio ETSI 650 Route des Lucio
2、les F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: htt
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6、ean Telecommunications Standards Institute 2003. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark
7、 of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI 3 ETSI TS 1 O1 948 VI .I .2 (2003-04) Contents Intellectual Property Rights . . . . . .5 Foreword . 5 1 2 3 3.1 3.2 4 4.1 4.2 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 6 6.1 6.2 6.3 6.4 6.5 Scope 6 References . . .
8、.6 Definitions and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 7 7 Overview . .8 Definitions . . . . .
9、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10、. . . Introduction . . . . . . . . Application of the DECT base standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modifications of the ph
11、ysical layer. . . . . .9 Nominal position of ISM band RF carriers 9 Accuracy and stability of ISM band RF carriers 9 Transmitter idle power output 9 Peak power per transceiver . 9 Emissions due to transmitter transients 10 Spurious emissions when allocated a tr 10 Spurious emissions when not allocat
12、ed a transmit channel . . 10 Modifications of the MAC layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 O 10 10 11 12 12 Hopset replaces r
13、eferences to RF carrier Frame number counter for the hopset . Bearer hop sequence and physical layer hop sequence RF carrier Q-channel message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . . . . . . . . . . . . . Annex A (informative): Formula used for generating the physical layer hop sequence 13 A. 1 Definitions 13 A.2 Recursive formula generating the bearer hop sequences . 13 A.3 Formula generating the physical layer hop sequence . 13 Annex B (informative): E
15、xplanation of FCC requirements . 15 B.l Transmitter RF power level and coverage ranges 15 B.2 Requirements on the pseudorandom hop sequences 15 B.3 Spurious and out-of-band emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 B.4 Procedures for idle lock and channel selection 16 Annex C (normative): RF carrier Q-channel message, QH = 8 (hex) . 17 C. 1 General . 17 C.2 RF carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 C.2.1 18 RF carrier number . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . C.2.2 Number of hopsets 18 Annex D (informative): Means to improve DECT-ISM resistance to local interference from other technologies 19 D. 1 Introduction 19 D.2 Procedures for handling interference . 20 ETSI 4 ETSI TS 1 O1 948 VI . 1 . 2 (2003-04) Annex E (informative): Bibliography .
19、22 History 23 ETSI 5 ETSI TS 1 O1 948 VI .I .2 (2003-04) Intellectual 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, an
20、d can be found in ETSI SR 000 314: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). All published ETSI deliverables shal
21、l include information which directs the reader to the above source of information. Foreword This Technical Specification (TS) has been produced by ETSI Project Digital Enhanced Cordless Telecommunications (DECT). ETSI 6 ETSI TS 1 O1 948 VI .I .2 (2003-04) 1 Scope The present document specifies the D
22、ECT derivative DECT-ISM for implementation in the 2,45 GHz ISM band 9, 101 and 1 i. The main difference between DECT and DECT-ISM is the addition of frequency hopping patterns fulfilling the FCC part 15 rules 101. The prime objective for speciSling DECT-ISM is to allow for introduction of a DECT-bas
23、ed technology in countries that have no spectrum allocated for DECT, but allow frequency hopping applications in the ISM band. The 2,4 GHz ISM band is available in all major markets worldwide. DECT-ISM will, compared to DECT, have limitations in range due to restrictions imposed by the ISM band rule
24、s 9, lo and limitations in quality of service mainly due to the fact that the ISM band is unprotected, while the DECT band is exclusively allocated for DECT. See further clause 4.1. The ISM band is unprotected in that sense that it allows for uncoordinated usage of a variety of incompatible communic
25、ation devices and also industrial, scientific and medical devices. The present document defining a DECT derivative with a frequency hopping overlay, mainly aimed for the North American market, will become obsolete and will be declared historical due to new US FCC part 15 rules. Standard DECT impleme
26、ntations are now allowed on the US ISM frequency bands 902 MHz to 928 MHz, 2 400 MHz to 2 483.5 MHz and 5 725 MHz to 5 850 MHz. 2 Re fe re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either speci
27、fic (identified by date of publication andor edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected loca
28、tion might be found at http:/docbox.ctsi.ora/Wefe-enci. il ETSI EN 300 175-1 : “Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1 : Overview“. ETSI EN 300 175-2: “Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 2: Physical Layer (PHL)
29、“. ETSI EN 300 175-3 : “Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 3: Medium Access Control (MAC) layer“. ETSI EN 300 175-4: “Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer“. ETSI EN 300 175-5: “
30、Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 5: Network (NWK) layer“. ETSI EN 300 175-6: “Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 6: Identities and addressing“. ETSI EN 300 175-7: “Digital Enhanced Cordless Telecommunicatio
31、ns (DECT); Common Interface (CI); Part 7: Security features“. ETSI EN 300 175-8: “Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 8: Speech coding and transmission“. 21 31 41 51 61 71 SI ETSI 7 ETSI TS 1 O1 948 VI .I .2 (2003-04) 91 ETSI EN 300 328: “Electromagnetic
32、compatibility and Radio spectrum Matters (ERM); Wideband Transmission systems; Data transmission equipment operating in the 2,4 GHz ISM band and using spread spectrum modulation techniques; Harmonized EN covering essential requirements under article 3.2 of the R Approval standard for ISM devices“. 3
33、 3.1 Definitions and abbreviations De fi nit ions For the purposes of the present document, the terms and definitions given in EN 300 175-1 i and the following apply: bearer hop sequence: sequence of ISM band RF carrier numbers used for a single bearer (slot), which is derived by cyclic repetition o
34、f a hopset and where a separate ISM band RF carrier number is selected in each 10 ms DECT frame hopset: pseudo-random sequence of ISM band RF carrier numbers in which each of the defined ISM band RF carrier numbers is represented once and only once NOTE: For the DECT derivative in the ISM band the h
35、opset corresponds to the RF carrier of regular DECT. hopset number: number used to designate a hopset NOTE: See clause 6.2. ISM band RF carrier: centre frequency occupied by one ISM band DECT transmission physical layer hop sequence: sequence of ISM band RF carrier numbers derived by inter-leaving t
36、he bearer hop sequences of one or more active bearers (slots) NOTE: The physical layer hop sequence is the sequence of hopping channels to which the hopping rules in EN 300 328 9 and FCC part 15 lo apply. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply:
37、ARI FCC FP ISM MAC NTP PP PT RF RFP SARI WLAN Access Rights Identity Federal Communications Commission Fixed Part Industrial, Scientific, Medical Medium Access Control Nominal Transmitter Power Portable Part Portable Termination Radio Frequency Radio Fixed Part Secondary AR1 Wireless Local Area Netw
38、ork ETSI 8 ETSI TS 1 O1 948 VI .I .2 (2003-04) 4 Overview 4.1 I n trod u ction The present document specifies the DECT derivative DECT-ISM for implementation in the 2,45 GHz ISM band 9, 1 i and conforming to FCC part 15 rules 101. The major addition to the DECT base standard EN 300 175-1 i to EN 300
39、 175-8 8 is the definition of sequences of frequency hops applied to the ISM band. The RF carriers of regular DECT equipment are for the ISM band application replaced by mutually non-interfering sequences of frequency hopping within the ISM band. Therefore dynamic channel selection can be made betwe
40、en these sequences, following the same procedures as regular DECT uses to make dynamic channel selection between the RF carriers. Therefore, for the purpose of the present document, all “RF carrier“ and “RF carrier number“ notations in text and tables in the MAC layer (EN 300 175-3 3) are interprete
41、d as “hopset“ or “hopset number“. In this way, DECT services and profile standards can be implemented also in the ISM band with hardly any changes to the MAC layer except for the above interpretation of “RF carrier“. To avoid PTs achieving idle lock on transmissions received on any of the adjacent r
42、eceiver channels, the FP transmits a Q-message indicating on which ISM band RF carrier c, the message was transmitted. Clause B.4 describes a preferred implementation of idle lock and channel selection procedures, which differ somewhat from implementations for regular DECT. A major difference betwee
43、n DECT-ISM and DECT is that DECT-ISM is applied on the non-protected ISM spectrum, while DECT is applied on a spectrum exclusive for DECT. DECT-ISM will provide coexistence and high quality of service in uncoordinated DECT-ISM systems. However, the ISM band allows for uncoordinated usage of a variet
44、y of incompatible communication devices and also industrial, scientific and medical devices. Therefore, high quality of service will not be guaranteed when other types of ISM devices (non-DECT-ISM devices) are used in the same local area. This applies especially to speech and video services, but is
45、less critical for packet data services where non-time-critical retransmissions are applied. DECT-ISM shares this inability to guarantee the quality of service with other technologies used for communication devices applied in the 2,4 GHz ISM band. Another limitation for DECT-ISM compared to DECT is t
46、he range. Typical DECT-ISM link budget could be 10 dB lower than for DECT, or only 4 dB to 5 dB lower if prolonged preamble diversity is provided. See clause B. 1. In spite of these limitations compared to DECT, DECT-ISM does exhibit attractive properties and performance compared to many other techn
47、ologies applied for communication in the ISM band. 4.2 Application of the DECT base standard The base standards EN 300 175-1 i to EN 300 175-8 8 apply, the present document only defines the amendments. In clause 5 modifications of the physical layer and in clause 6 modifications of the MAC layer are
48、 described. ETSI 9 ETSI TS 1 O1 948 VI .I .2 (2003-04) 5 Modifications of the physical layer 5.1 Nominal position of ISM band RF carriers This clause replaces clause 4.1.1 of the base standard EN 300 175-2 2. 45 ISM band RF carriers shall be placed into the frequency band 2 400 MHz to 2 483,5 MHz wi
49、th centre frequencies Fc given by: Fc = F, + c x 1,728 MHz. where: F, = 2 403,648 MHz; and c=o,1, .) 44. 5.2 Accuracy and stability of ISM band RF carriers This clause modifies clause 4.1.2 of the base standard EN 300 175-2 2. At an RFP the transmitted RF carrier frequency corresponding to RF channel c shall be in the range Fc f 80 kHz at extreme conditions. At a PP the centre frequency accurac
