Control resource set zero for reduced capability new radio devices
The present disclosure provides communication apparatuses and communication methods for implementation of Control Resource Set Zero (CORESET #0) for Reduced Capability (RedCap) New Radio Devices. The communication apparatuses include a communication apparatus which comprises a receiver, which in operation, receives a physical downlink control channel (PDCCH) on a control resource set zero (CORESET #0) of which time and frequency resources are defined based on a bandwidth configuration of reduced capacity user equipments (RedCap UEs), and receives a system information block type 1 (SIB1) physical downlink shared channel (PDSCH) which is scheduled based on the CORESET #0; and circuitry, which in operation, determines control information and parameters from the PDCCH on CORESET #0 to read SIB1 for initial access, handover, or beam failure recovery.
1 . A communication apparatus, comprising:
a receiver, which in operation, receives a physical downlink control channel (PDCCH) on a control resource set zero (CORESET #0) of which time and frequency resources are defined based on a bandwidth configuration of reduced capacity user equipment (RedCap UE), and receives a system information block type 1 (SIB1) physical downlink shared channel (PDSCH) which is scheduled based on the CORESET #0; and
circuitry, which in operation, determines control information and parameters-from the PDCCH on CORESET #0 to read SIB1,
wherein,
the RedCap UE supports a first bandwidth, which is used for configuring both non-RedCap UE and the RedCap UE, and is equal to or greater than a maximum bandwidth of the CORESET #0.
2 . The communication apparatus according to claim 1 , wherein the CORESET #0 for the RedCap UE is defined according to a table in clause 13 of TS 38.213.
3 . The communication apparatus according to claim 1 , wherein the CORESET #0 is a Rel-15 CORESET #0 that is partitioned into m equal or unequal subsets, m being greater 1.
4 . The communication apparatus according to claim 1 , wherein information indicating Rel-15 CORESET #0 and PDCCH monitoring occasions for the non-RedCap UE is used to present the CORESET #0 for the RedCap UE, the information comprising entries in ControlResourceSetZero and SearchSpaceZero IEs in a master information block (MIB).
5 . The communication apparatus according to claim 1 , wherein the circuitry is configured to read the SIB1 from a Rel-15 CORESET #0 for the non-RedCap UE if the communication apparatus is the non-RedCap UE or from the CORESET #0 for the RedCap UE if the communication apparatus is the RedCap UE.
6 . The communication apparatus according to claim 1 , wherein the RedCap UE supports a second bandwidth, which is used for configuring the RedCap UE, and is smaller than the maximum bandwidth of the CORESET #0.
7 . The communication apparatus according to claim 6 , wherein
when the second bandwidth is supported, the frequency resources comprise at least one of a second number of physical resource blocks (PRBs) and a third number of PRBs, which are obtained by unevenly dividing a first number of PRBs indicated by a table, and
the second number of PRBs and the third number of PRBs are smaller than the second bandwidth.
8 . The communication apparatus according to claim 1 , wherein the CORESET #0 for the RedCap UE comprises two or three consecutive orthogonal frequency division multiplexing (OFDM) symbols.
9 . The communication apparatus according to claim 1 , wherein the maximum bandwidth of the CORESET #0 is defined as a number of consecutive physical resource blocks (PRBs).
10 . A base station, comprising:
circuitry, which in operation, configures a control resource set zero (CORESET #0) of which time and frequency resources are defined based on a bandwidth configuration of reduced capacity user equipment (RedCap UE), generates a physical downlink control channel (PDCCH) on the CORESET #0, and schedules a system information block type 1 (SIB1) physical downlink shared channel (PDSCH) based on the CORESET #0; and
a transmitter, which in operation, transmits the PDCCH on CORESET #0 and the SIB1 PDSCH to a communication apparatus,
wherein,
the RedCap UE supports a first bandwidth, which is used for configuring both non-RedCap UE and the RedCap UE, and is equal to or greater than a maximum bandwidth of the CORESET #0.
11 . A communication method, comprising:
receiving a CORESET #0 of which time and frequency resources are defined based on a minimum-bandwidth configuration of reduced capacity user equipment (RedCap UE),
receiving a system information block type 1 (SIB1) physical downlink shared channel (PDSCH) which is scheduled based on the CORESET #0; and
determining control information from the PDCCH on CORESET #0 to read the SIB1,
wherein,
the RedCap UE supports a first bandwidth, which is used for configuring both non-RedCap UE and the RedCap UE, and is equal to or greater than a maximum bandwidth of the CORESET #0.