【文章內(nèi)容簡(jiǎn)介】 used for the MPDCCH set；如果高層配置了numberPRBPairs r13=n6，則意味著=2+4。resourceBlockAssignmentr11: indicating a binatorial index corresponding to the PRB index , () and given by equation ,transmissionTyper11: Indicates whether distributed or localized EPDCCH transmission mode is used，集中式和分布式的區(qū)別在于ECCE 映射到EREG和PRB pair的方式不同。mpdcchNarrowbandr13：Narrowband for UESS for MPDCCHmpdcchNumRepetitionr13：Maximum numbers of repetitions for UESS for MPDCCH 一個(gè)MPDCCH在一個(gè)或多個(gè)連續(xù)的ECCE(Enhanced Control Channel Element)上傳輸，每個(gè)ECCE由多個(gè)EREGG(Enhanced Resource Element Group)組成。MPDCCH固定使用QPSK調(diào)制。MPDCCH的鏈路自適應(yīng)(即使用不同碼率)是通過調(diào)整一個(gè)MPDCCH使用的ECCE數(shù)(即聚合等級(jí))來實(shí)現(xiàn)的。 小區(qū)可以給每個(gè)BL/CE UE配置一個(gè)或兩個(gè)PRB pair集合，MPDCCH只能在這些PRB pair集合上傳輸。高層通過配置1個(gè)或2個(gè)EPDCCHSetConfigr11來配置MPDCCH相關(guān)參數(shù)。每個(gè)配置集合的索引是p。MPDCCH集合p包含的PRB數(shù)為( numberPRBPairsr11)，可以配置為n2, n4或n6。每個(gè)MPDCCH集合所包含的所有PRB pair的PRB索引通過resourceBlockAssignmentr11 進(jìn)行計(jì)算。resourceBlockAssignmentr11 指定了一個(gè)組合索引(binatorial index) r。通過該組合索引r，能夠得到MPDCCH集合包含的所有PRB pair的PRB索引, 。通過公式，能夠得到一個(gè)唯一的。其中 = 6。 如果在同一個(gè)子幀上，一個(gè)PRB pair上傳輸了PBCH或PSS/SSS，并且一個(gè)MPDCCH candidate的其中一個(gè)ECCE映射到該P(yáng)RB pair上，則該MPDCCH candidate不能用于傳輸MPDCCH，UE也不會(huì)去監(jiān)聽該MPDCCH candidate。換句話說，PBCH/PSS/SSS所在的PRB pair不能用于MPDCCH的傳輸。 EREG用于定義如何將MPDCCH映射到RE。每個(gè)PRB pair包含了16個(gè)EREG，編號(hào)是0~15。正常的循環(huán)前綴下，每個(gè)EREG由9個(gè)RE組成；擴(kuò)展循環(huán)前綴下，每個(gè)EREG由8個(gè)RE組成。組成一個(gè)EREG的9個(gè)(或8個(gè))RE并不一定都能用于MPDCCH的傳輸。PDCCH所在的控制區(qū)域，小區(qū)特定的參考信號(hào)和CSI參考信號(hào)不能用于MPDCCH傳輸(但RE編號(hào)仍照此進(jìn)行)。 表示一個(gè)ECCE內(nèi) 包含的EREG數(shù)目，該值在不同能夠配置下是不同的，參考下表：Normal cyclic prefixExtended cyclic prefixNormal subframeSpecial subframe, configuration 3, 4, 8Normal subframeSpecial subframe, configuration 1, 2, 3, 5, 648 Table MPDCCH with 2 or 4 PRB，并且MPDCCH repetition未配置的情況下。否則使用Table Table : Supported EPDCCH formatsEPDCCH formatNumber of ECCEs for one EPDCCH, Case ACase BLocalized transmissionDistributed transmissionLocalized transmissionDistributed transmission022111442228844316168843216Table : Supported MPDCCH formatsMPDCCH formatNumber of ECCEs in a subframe for one MPDCCH, =4=8Localized transmissionDistributed transmissionLocalized transmissionDistributed transmission02211144222884431616884524241212 由于每個(gè)PRB pair 包含16個(gè)EREG，每個(gè)ECCE包含個(gè)EREG，而每個(gè)MPDCCH配置集合包含個(gè)PRB pair，所以MPDCCH配置p里面包含=16/個(gè)ECCE。 Repetition 每個(gè)MPDCCH需要傳輸次，這個(gè)repetition number由高層參數(shù)mpdcchNumRepetitionr13 和MPDCCH攜帶的DCI信息中的DCI subframe repetition number共同決定。在repetition傳輸中，根據(jù)高層配置，可以enable freq hopping。 MPDCCH的Scrambling中使用到了參數(shù)，這個(gè)在個(gè)連續(xù)子幀內(nèi)，使用相同的擾碼，即UE可以在Demod前進(jìn)行合并來提高性能。這個(gè)根據(jù)CEModeA/B和FDD/TDD有不同的取值。 MPDCCH重復(fù)傳輸?shù)钠鹗甲訋皇侨我馕恢玫?，是根?jù)高層配置參數(shù)計(jì)算出來的。具體見213, 。這樣UE就能夠根據(jù)起始位置，重復(fù)次數(shù)得到MPDCCH傳輸?shù)淖詈笠粋€(gè)子幀。 DCI format 針對(duì)MPDCCH，新增了5個(gè)DCI format，分別是DCI Format 60 A/B, DCI Format 61 A/B, DCI Format 62. 其中A/B表示CEModeA/B. Format 60用于PUSCH調(diào)度；Format 61 用于PDSCH調(diào)度；Format 62用于 Paging和Direct Indication(系統(tǒng)消息更新)。 MPDCCH上同時(shí)也可以攜帶DCI format 3/3A用于PUCCH/PUSCH的功控。 BL/CE需要檢測(cè)MPDCCH的所有情況 下行相關(guān)Table : MPDCCH and PDSCH configured by PRNTIDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to MPDCCH62Type1monIf the number of PBCH antenna ports is one, Singleantenna port, port 0 is used (see subclause ), otherwise Transmit diversity (see subclause )Table : MPDCCH and PDSCH configured by RARNTIDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to MPDCCH61A or 61BType2monIf the number of PBCH antenna ports is one, Singleantenna port, port 0 is used (see subclause ), otherwise Transmit diversity (see subclause )BL/CE UE CEModeA支持TM1,2,6,9四種傳輸模式，CEModeB支持TM1,2,9三種傳輸模式。Table : MPDCCH and PDSCH configured by CRNTITransmission modeDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to MPDCCHMode 161A Type0Common Singleantenna port, port 0 (see subclause )61A or 61BUE specific by CRNTIMode 261A Type0Common Transmit diversity (see subclause )61A or 61BUE specific by CRNTIMode 661AType0Common Transmit diversity (see subclause )61AUE specific by CRNTIClosedloop spatial multiplexing (see subclause ) using a single transmission layerMode 961AType0Common If the number of PBCH antenna ports is one, Singleantenna port, port 0 is used (see subclause ), otherwise Transmit diversity (see subclause )61AUE specific by CRNTISingleantenna port, port 7 or 8 (see subclause )61BUE specific by CRNTISingleantenna port, port 7 (see subclause )Table : MPDCCH and PDSCH configured by SPS CRNTITransmission modeDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to MPDCCHMode 161AType0Common Singleantenna port, port 0 (see subclause )61AUE specific by CRNTIMode 261AType0Common Transmit diversity (see subclause )61AUE specific by CRNTIMode 661AType0Common Transmit diversity (see subclause )61AUE specific by CRNTITransmit diversity (see subclause )Mode 961AType0Common Singleantenna port, port 7 (see subclause )61AUE specific by CRNTISingleantenna port, port 7 (see subclause )Table : MPDCCH and PDSCH configured by Temporary CRNTI and/or CRNTI during random access procedureDCI formatSearch SpaceTransmission scheme of PDSCH corresponding to MPDCCHDCI format 61A Type2Common If the number of PBCH antenna port is one, Singleantenna port, port 0 is used (see subclause ), otherwise Transmit diversity (see subclause )DCI format 61BType2Common If the number of PBCH antenna port is one, Singleantenna port, port 0 is used (see subclause ), otherwise Transmit diversity (see subclause ) 上行相關(guān)Table 83B: MPDCCH and PUSCH configured by CRNTITransmission modeDCI formatSearch SpaceTransmission schem