正如LTE,在5G(NR)中一個大的傳輸塊(TB-Transport Block )也被分成多個碼塊(CBs-Code Block )。然而與LTE不同的是,5G(NR)新增了數(shù)據(jù)單位-碼塊組(CBG-Code Block Group),它由多個CBs (Code Block)組成;5G(NR)網(wǎng)絡的ACK/NACK和數(shù)據(jù)重傳都是以碼塊組(CBG)為單位;CBG是在DCI(Format 0_1, Format 1_1)指示;整理:kangguoying20200820
1.傳輸塊(TB)結(jié)構(gòu)
一個傳輸塊(TB)由多個碼塊組(CBG)構(gòu)成,一個碼塊組(CBG)由多個CB組成,結(jié)構(gòu)如下:整理:kangguoying20200820
2.傳輸塊(TB)特殊結(jié)構(gòu)
一個傳輸塊(TB)僅由一個碼塊組(CBG)構(gòu)成,這種情況比較少見。整理:kangguoying20200820
3.RRC消息中CBG
PDSCH-ServingCellConfig ::= SEQUENCE {整理:kangguoying20200820
codeBlockGroupTransmission SetupRelease { PDSCH-CodeBlockGroupTransmission } OPTIONAL,
xOverhead ENUMERATED { xOh6, xOh12, xOh18 } OPTIONAL, -- Need S
nrofHARQ-ProcessesForPDSCH ENUMERATED {n2, n4, n6, n10, n12, n16} OPTIONAL, -- Need S
pucch-Cell ServCellIndex OPTIONAL , -- Cond
SCellAddOnly ...} 整理:kangguoying20200820
PDSCH-CodeBlockGroupTransmission ::= SEQUENCE {整理:kangguoying20200820
maxCodeBlockGroupsPerTransportBlock ENUMERATED {n2, n4, n6, n8},
codeBlockGroupFlushIndicator BOOLEAN, ...}整理:kangguoying20200820
原文來自:http://www.sharetechnote.com/ 整理:kangguoying20200820
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