5G/NR - PDCCH Common Search Space               Home : www.sharetechnote.com

 

 

 

 

 

PDCCH Common

 

PDCCH-ConfigCommon is used mainly to configure various common search space. (Refer to this page if you want to know of the details of various search space).

 

 

PDCCH-ConfigCommon ::=                  SEQUENCE {

    commonControlResourcesSets      SEQUENCE (SIZE(1..2)) OF ControlResourceSet     OPTIONAL,

    commonSearchSpaces              SEQUENCE (SIZE(1..4)) OF SearchSpace            OPTIONAL, 

    searchSpaceSIB1                         SearchSpaceId             OPTIONAL, 

    searchSpaceOtherSystemInformation       SearchSpaceId             OPTIONAL,  

    pagingSearchSpace                       SearchSpaceId             OPTIONAL,  

    ra-ControlResourceSet                   ControlResourceSetId      OPTIONAL,   

    ra-SearchSpace                          SearchSpaceId             OPTIONAL,

    ...

 

}

 

commonControlResourcesSets : A list of common control resource sets. Only CORESETs with ControlResourceSetId = 0 or 1 are allowed. The CORESET#0 corresponds to the CORESET configured in MIB (see pdcch-ConfigSIB1) and is used to provide that information to the UE by dedicated signalling during handover and (P)SCell addition. The CORESET#1 may be configured an used for RAR

 

commonSearchSpaces :  A list of additional common search spaces

 

searchSpaceSIB1 : ID of the search space for SIB1 message. Corresponds to L1 parameter 'rmsi-SearchSpace'

 

searchSpaceOtherSystemInformation : ID of the Search space for other system information, i.e., SIB2 and beyond. Corresponds to L1 parameter 'osi-SearchSpace'. If the field is absent, the monitoring occasions are derived as described in PDCCH Type 0 Common Search Space page.

 

pagingSearchSpace : ID of the Search space for paging. Corresponds to L1 parameter 'paging-SearchSpace'. If the field is absent, the monitoring occasions are derived as described in PDCCH Type 0 Common Search Space page.

 

ra-ControlResourceSet : CORESET configured for random access. When the field is absent the UE uses the CORESET according to pdcch-ConfigSIB1 which is associated with ControlResourceSetId = 0. Corresponds to L1 parameter 'rach-coreset-configuration'

 

ra-SearchSpace : ID of the Search space for random access procedure. Corresponds to L1 parameter 'ra-SearchSpace'.  If the field is absent, the monitoring occasions are derived as described in PDCCH Type 0 Common Search Space page.

 

 

 

 

Reference

 

[1] Type0-PDCCH common search space