LTE基礎(chǔ)：PDCCH盲檢測與DCI和RNTI關(guān)系

時(shí)間：2015-05-12　來源：中國集群通信網(wǎng)　作者：本站整理　點(diǎn)擊：次

主頁（http://www.130131.com）：LTE基礎(chǔ)：PDCCH盲檢測與DCI和RNTI關(guān)系

UE根據(jù)在子幀中檢測到的具有DCI格式1，1A，1B，1C，1D，2,2A或者UE擴(kuò)展的DCI格式2B的PDCCH，使用上層定義的傳輸塊數(shù)目限制條件來解碼在同一子幀中相應(yīng)的PDSCH。

UE可能設(shè)想定位參考信號(hào)不在根據(jù)用DCI格式1A或者1C的SI-RNTI或者P-RNTI做CRC擾碼的PDCCH解碼的PDSCH的資源塊中出現(xiàn)。

如果UE被高層設(shè)置解碼具有用SI-RNTI擾碼CRC的PDCCH時(shí)，UE將根據(jù)表7.1-1中定義的任意組合來解碼PDCCH和對(duì)應(yīng)的PDSCH。對(duì)應(yīng)于這些PDCCH的PDSCH用SI-RNTI來進(jìn)行擾碼初始化。

盲檢測與DCI和RNTI關(guān)系如下多張表：

Table 7.1-1:PDCCH and PDSCH configured by SI-RNTI

DCI format	Search Space	Transmission scheme of PDSCH corresponding to PDCCH
DCI format 1C	Common	If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used, otherwise Transmit diversity.
DCI format 1A	Common	If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used, otherwise Transmit diversity

同樣道理：

Table 7.1-2:PDCCH and PDSCH configured by P-RNTI

DCI format	Search Space	Transmission scheme of PDSCH corresponding to PDCCH
DCI format 1C	Common	If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used （see subclause 7.1.1）, otherwise Transmit diversity
DCI format 1A	Common	If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)

Table 7.1-3:PDCCH and PDSCH configured by RA-RNTI

DCI format	Search Space	Transmission scheme of PDSCH corresponding to PDCCH
DCI format 1C	Common	If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)
DCI format 1A	Common	If the number of PBCH antenna ports is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)

Table 7.1-5: PDCCH and PDSCHconfigured by C-RNTI

Transmission mode	DCI format	Search Space	Transmission scheme of PDSCH corresponding to PDCCH
Mode 1	DCI format 1A	Common and UE specific by C-RNTI	Single-antenna port, port 0 (see subclause7.1.1)
Mode 1	DCI format 1	UE specific by C-RNTI	Single-antenna port, port 0 (see subclause7.1.1)
Mode 2	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 2	DCI format 1	UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 3	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 3	DCI format 2A	UE specific by C-RNTI	Large delay CDD (see subclause 7.1.3) orTransmit diversity (see subclause 7.1.2)
Mode 4	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 4	DCI format 2	UE specific by C-RNTI	Closed-loop spatial multiplexing (see subclause 7.1.4)or Transmit diversity (see subclause 7.1.2)
Mode 5	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 5	DCI format 1D	UE specific by C-RNTI	Multi-user MIMO (see subclause 7.1.5)
Mode 6	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 6	DCI format 1B	UE specific by C-RNTI	Closed-loop spatial multiplexing (see subclause 7.1.4) using a single transmission layer
Mode 7	DCI format 1A	Common and UE specific by C-RNTI	If the number of PBCH antenna ports is one,Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)
Mode 7	DCI format 1	UE specific by C-RNTI	Single-antenna port; port 5 (see subclause 7.1.1)
Mode 8	DCI format 1A	Common and UE specific by C-RNTI	If the number of PBCH antenna ports is one,Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)
Mode 8	DCI format 2B	UE specific by C-RNTI	Dual layer transmission; port 7 and 8 (see subclause 7.1.5A) or single-antenna port; port 7 or 8 (see subclause 7.1.1)

Table 7.1-6: PDCCH and PDSCHconfigured by SPS C-RNTI

Transmission mode	DCI format	Search Space	Transmission scheme of PDSCH corresponding to PDCCH
Mode 1	DCI format 1A	Common and UE specific by C-RNTI	Single-antenna port, port 0 (see subclause 7.1.1)
Mode 1	DCI format 1	UE specific by C-RNTI	Single-antenna port, port 0 (see subclause 7.1.1)
Mode 2	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 2	DCI format 1	UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 3	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 3	DCI format 2A	UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 4	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 4	DCI format 2	UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 5	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 6	DCI format 1A	Common and UE specific by C-RNTI	Transmit diversity (see subclause 7.1.2)
Mode 7	DCI format 1A	Common and UE specific by C-RNTI	Single-antenna port; port 5 (see subclause 7.1.1)
Mode 7	DCI format 1	UE specific by C-RNTI	Single-antenna port; port 5 (see subclause 7.1.1)
Mode 8	DCI format 1A	Common and UE specific by C-RNTI	Single-antenna port; port 7(see subclause 7.1.1)
Mode 8	DCI format 2B	UE specific by C-RNTI	Single-antenna port; port 7 or 8 (see subclause 7.1.1)

Table 7.1-7: PDCCH and PDSCHconfigured by Temporary C-RNTI

DCI format	Search Space	Transmission scheme of PDSCH corresponding to PDCCH
DCI format 1A	Common and UE specific by Temporary C-RNTI	If the number of PBCH antenna port is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)
DCI format 1	UE specific by Temporary C-RNTI	If the number of PBCH antenna port is one, Single-antenna port, port 0 is used (see subclause 7.1.1), otherwise Transmit diversity (see subclause 7.1.2)