PDCCH搜索空间类型的确定

一、搜索空间类型有哪些
common search space:(公共搜索空间CSS)
1、Type0-PDCCH CSS
2、Type0A-PDCCH CSS
3、Type1-PDCCH CSS
4、Type2-PDCCH CSS
5、Type3-PDCCH CSS
UE-special search space:(特殊搜索空间USS)
UE-special

二、各个搜索空间支持的RNTI类型
根据5G NR 38213中第10章的10.1节(下面给出)

  • a Type0-PDCCH CSS set configured by pdcch-ConfigSIB1 in MIB or by searchSpaceSIB1 in PDCCH-ConfigCommon or by searchSpaceZero in PDCCH-ConfigCommon for a DCI format with CRC scrambled by a SI-RNTI on the primary cell of the MCG
  • a Type0A-PDCCH CSS set configured by searchSpaceOtherSystemInformation in PDCCH-ConfigCommon for a DCI format with CRC scrambled by a SI-RNTI on the primary cell of the MCG
  • a Type1-PDCCH CSS set configured by ra-SearchSpace in PDCCH-ConfigCommon for a DCI format with CRC scrambled by a RA-RNTI or a TC-RNTI on the primary cell
  • a Type2-PDCCH CSS set configured by pagingSearchSpace in PDCCH-ConfigCommon for a DCI format with CRC scrambled by a P-RNTI on the primary cell of the MCG
  • a Type3-PDCCH CSS set configured by SearchSpace in PDCCH-Config with searchSpaceType = common for DCI formats with CRC scrambled by INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, or TPC-SRS-RNTI and, only for the primary cell, C-RNTI, MCS-C-RNTI, or CS-RNTI(s), and
  • a USS set configured by SearchSpace in PDCCH-Config with searchSpaceType = ue-Specific for DCI formats with CRC scrambled by C-RNTI, MCS-C-RNTI, SP-CSI-RNTI, or CS-RNTI(s).
    即:
    PDCCH搜索空间类型的确定_第1张图片

则根据RNTI的类型就可以确定需监测的搜索空间类型,根据RNTI也可以确定DCI的类型。
以下给出伪代码:
if(type = = SI-RNTI){
if( is_configured(searchSpaceOtherSystemInformation)){
search_space=Type0A;
}else{
search_space=Type0;
}
DCI_type=DCI1-0;
}
else if(type==P-RNTI){
search_space=Type2;
}
else if … (按照上面给出的分类写)

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