1、 ETSI TS 137 213 V15.0.0 (2018-07) LTE; Physical layer procedures for shared spectrum channel access (3GPP TS 37.213 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 137 213 V15.0.0 (2018-07)13GPP TS 37.213 version 15.0.0 Release 15Reference DTS/TSGR-0137213vf00 Keywords LTE ETSI 650
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13、 an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP iden
14、tities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present docume
15、nt “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except wh
16、en used in direct citation. ETSI ETSI TS 137 213 V15.0.0 (2018-07)33GPP TS 37.213 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 S
17、ymbols 5g33.3 Abbreviations . 6g34 Channel access procedure 6g34.1 Downlink channel access procedures . 6g34.1.1 Channel access procedure for transmission(s) including PDSCH/PDCCH/EPDCCH . 6g34.1.2 Channel access procedure for transmissions including discovery signal transmission(s) and not includin
18、g PDSCH . 7g34.1.3 Channel access procedure for transmissions including PDCCH and not including PDSCH 8g34.1.4 Contention window adjustment procedure . 8g34.1.5 Energy detection threshold adaptation procedure . 9g34.1.6 Channel access procedure for transmission(s) on multiple carriers 10g34.1.6.1 Ty
19、pe A multi-carrier access procedures 10g34.1.6.1.1 Type A1 . 10g34.1.6.1.2 Type A2. 10g34.1.6.2 Type B multi-carrier access procedure 10g34.1.6.2.1 Type B1 . 11g34.1.6.2.2 Type B2 . 11g34.2 Uplink channel access procedures 11g34.2.1 Channel access procedure for uplink transmission(s) . 11g34.2.1.1 T
20、ype 1 UL channel access procedure 15g34.2.1.2 Type 2 UL channel access procedure 16g34.2.2 Contention window adjustment procedure . 16g34.2.3 Energy detection threshold adaptation procedure . 18g34.2.3.1 Default maximum energy detection threshold computation procedure . 18g3Annex X (informative): Ch
21、ange history . 20g3History 21g3ETSI ETSI TS 137 213 V15.0.0 (2018-07)43GPP TS 37.213 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG a
22、nd may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for informati
23、on; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incor
24、porated in the document. ETSI ETSI TS 137 213 V15.0.0 (2018-07)53GPP TS 37.213 version 15.0.0 Release 151 Scope The present document specifies and establishes the characteristics of the physical layer procedures for shared spectrum channel. 2 References The following documents contain provisions whi
25、ch, through reference in this text, constitute provisions of the present document. - References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. - For a specific reference, subsequent revisions do not apply. - For a non-specific reference
26、, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 36.
27、104: “Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) radio transmission and reception“. 3 3GPP TS 36.101: “Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception“. 4 3GPP TS 36.213: “Evolved Universal Terrestrial Radio Access
28、 (E-UTRA); Physical layer procedures“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 1 apply. A term defined in the present document takes precedence over the definition of the same term, if any, i
29、n 3GPP TR 21.905 1. 3.2 Symbols For the purposes of the present document, the following symbols apply: pCW Contention window for a given priority class pCWmax,Maximum contention window for a given priority class pCWmin,Minimum contention window for a given priority class pmTcot,Maximum channel occup
30、ancy time for a given priority class pulmTcot,Maximum Uplink channel occupancy time for a given priority class ThreshX Energy detection threshold Thresh_maxX Maximum energy detection threshold ETSI ETSI TS 137 213 V15.0.0 (2018-07)63GPP TS 37.213 version 15.0.0 Release 153.3 Abbreviations For the pu
31、rposes of the present document, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. AUL-DFI Autonomous UL Downlink feedback indication COT Chan
32、nel Occupancy Time LAA Licensed Assisted Access MCOT Maximum Channel Occupancy Time 4 Channel access procedure 4.1 Downlink channel access procedures An eNB operating LAA Scell(s) shall perform the channel access procedures described in this sub clause for accessing the channel(s) on which the LAA S
33、cell(s) transmission(s) are performed. 4.1.1 Channel access procedure for transmission(s) including PDSCH/PDCCH/EPDCCH The eNB may transmit a transmission including PDSCH/PDCCH/EPDCCH on a carrier on which LAA Scell(s) transmission(s) are performed , after first sensing the channel to be idle during
34、 the slot durations of a defer duration dT ; and after the counter N is zero in step 4. The counter N is adjusted by sensing the channel for additional slot duration(s) according to the steps below: 1) set initNN = , where initN is a random number uniformly distributed between 0 and pCW , and go to
35、step 4; 2) if 0N and the eNB chooses to decrement the counter, set 1= NN ; 3) sense the channel for an additional slot duration, and if the additional slot duration is idle, go to step 4; else, go to step 5; 4) if 0=N , stop; else, go to step 2. 5) sense the channel until either a busy slot is detec
36、ted within an additional defer duration dT or all the slots of the additional defer duration dT are detected to be idle; 6) if the channel is sensed to be idle during all the slot durations of the additional defer duration dT , go to step 4; else, go to step 5; If an eNB has not transmitted a transm
37、ission including PDSCH/PDCCH/EPDCCH on a carrier on which LAA Scell(s) transmission(s) are performed after step 4 in the procedure above, the eNB may transmit a transmission including PDSCH/PDCCH/EPDCCH on the carrier, if the channel is sensed to be idle at least in a slot duration slT when the eNB
38、is ready to transmit PDSCH/PDCCH/EPDCCH and if the channel has been sensed to be idle during all the slot durations of a defer duration dT immediately before this transmission. If the channel has not been sensed to be idle in a slot duration slT when the eNB first senses the channel after it is read
39、y to transmit or if the channel has been sensed to be not idle during any of the slot durations of a defer duration dT immediately before this intended transmission, the eNB proceeds to step 1 after sensing the channel to be idle during the slot durations of a defer duration dT . The defer duration
40、dT consists of duration usTf16= immediately followed by pm consecutive slot durations where each slot duration is 9slT us= , and fT includes an idle slot duration slT at start of fT ; ETSI ETSI TS 137 213 V15.0.0 (2018-07)73GPP TS 37.213 version 15.0.0 Release 15A slot duration slT is considered to
41、be idle if the eNB senses the channel during the slot duration, and the power detected by the eNB for at least us4 within the slot duration is less than energy detection threshold ThreshX . Otherwise, the slot duration slT is considered to be busy. pppCWCWCWmax,min, is the contention window. pCW adj
42、ustment is described in sub clause 4.1.4. pCWmin,and max, pCW are chosen before step 1 of the procedure above. pm , pCWmin, and max, pCW are based on channel access priority class associated with the eNB transmission, as shown in Table 4.1.1-1. ThreshX adjustment is described in sub clause 4.1.4 If
43、the eNB transmits discovery signal transmission(s) not including PDSCH/PDCCH/EPDCCH when 0N in the procedure above, the eNB shall not decrement N during the slot duration(s) overlapping with discovery signal transmission. The eNB shall not continuously transmit on a carrier on which the LAA Scell(s)
44、 transmission(s) are performed, for a period exceedingpmTcot,as given in Table 4.1.1-1. For 3=p and 4=p , if the absence of any other technology sharing the carrier can be guaranteed on a long term basis (e.g. by level of regulation), msTpm10cot,= , otherwise, msTpm8cot,= . Table 4.1.1-1: Channel Ac
45、cess Priority Class Channel Access Priority Class (p ) pm pCWmin,pCWmax,pmTcot,allowed pCW sizes 1 1 3 7 2 ms 3,7 2 1 7 15 3 ms 7,15 3 3 15 63 8 or 10 ms 15,31,63 4 7 15 1023 8 or 10 ms 15,31,63,127,255,511,1023 For LAA operation in Japan, if the eNB has transmitted a transmission after 0=N in step
46、4 of the procedure above, the eNB may transmit the next continuous transmission, for duration of maximum jT =4 ms, immediately after sensing the channel to be idle for at least a sensing interval of jsT =34us and if the total sensing and transmission time is not more than jsjmcotmcotTT/TT1000 + 1 se
47、c. jsT consists of duration usTf16= immediately followed by two slot durations 9slT us= each and fT includes an idle slot duration slT at start of fT . The channel is considered to be idle for jsT if it is sensed to be idle during the during the slot durations of jsT . 4.1.2 Channel access procedure
48、 for transmissions including discovery signal transmission(s) and not including PDSCH An eNB may transmit a transmission including discovery signal but not including PDSCH on a carrier on which LAA Scell(s) transmission(s) are performed immediately after sensing the channel to be idle for at least a
49、 sensing interval usT 25drs= and if the duration of the transmission is less than 1 ms. drsT consists of a duration usTf16=ETSI ETSI TS 137 213 V15.0.0 (2018-07)83GPP TS 37.213 version 15.0.0 Release 15immediately followed by one slot duration 9slT us= and fT includes an idle slot duration slT at start of fT . The channel is considered to be idle for drsT if it is sensed to be idle during the slot durations of drsT . 4.1.3 Channel access procedure for transmissions including PDCCH and not including PDSCH If a PUSCH transmission indicates COT
