Terminal and radio communication system for flexible multicast and broadcast scheduling
A terminal receives downlink control information for the downlink data channel. The terminal performs scheduling of the downlink data channel in data distribution for multiple terminals based on specific downlink control information separate from the downlink control information.
1 . A terminal comprising:
a receiver that receives downlink control information scrambled by a group common radio network temporary identifier (RNTI) for broadcast and downlink control information scrambled by another group common RNTI for multicast; and
a processor that executes scheduling of a downlink data channel for broadcast in data distribution for multiple terminals based on the downlink control information for broadcast and executes scheduling of a downlink data channel for multicast in data distribution for multiple terminals based on the downlink control information for multicast,
wherein the downlink control information for broadcast does not include an Identifier for Downlink Control Information (DCI) formats and a transmit power control (TPC) command for scheduling Physical Uplink Control Channel (PUCCH), further does not include at least one of a field of a PUCCH resource indicator and a field of a Physical Downlink Shared Channel-to-Hybrid Automatic Repeat Request (PDSCH-to-HARQ) feedback timing indicator, among fields of downlink control information scrambled by a terminal-specific RNTI, and includes a field other than the fields of the downlink control information scrambled by the terminal-specific RNTI, and has a same size as that of the downlink control information scrambled by the terminal-specific RNTI, and
wherein the downlink control information for multicast does not include each field of the Identifier for DCI formats and the TPC Command for scheduling PUCCH, but includes the PUCCH resource indicator and the PDSCH-to-HARQ feedback timing indicator among the fields which are included in the downlink control information scrambled by the terminal-specific RNTI,
when the downlink control information for multicast includes an antenna port field, a size of the antenna port field is based on a higher layer, and
when the downlink control information for multicast does not include the antenna port field, the downlink control information for multicast has a same size as that of the downlink control information scrambled by the terminal-specific RNTI.
2 . The terminal according to claim 1 , wherein
the group common RNTI for broadcast is a group radio network temporary identifier (G-RNTI) and the terminal-specific RNTI is a cell radio network temporary identifier (C-RNTI).
3 . A communication method of a terminal comprising:
receiving downlink control information scrambled by a group common radio network temporary identifier (RNTI) for broadcast and downlink control information scrambled by another group common RNTI for multicast; and
executing scheduling of a downlink data channel for broadcast in data distribution for multiple terminals based on the downlink control information for broadcast and scheduling of a downlink data channel for multicast in data distribution for multiple terminals based on the downlink control information for multicast,
wherein the downlink control information for broadcast does not include an Identifier for Downlink Control Information (DCI) formats and a transmit power control (TPC) command for scheduling Physical Uplink Control Channel (PUCCH), further does not include at least one of a field of a PUCCH resource indicator and a field of a Physical Downlink Shared Channel-to-Hybrid Automatic Repeat Request (PDSCH-to-HARQ) feedback timing indicator, among fields of downlink control information scrambled by a terminal-specific RNTI, and includes a field other than the fields of the downlink control information scrambled by the terminal-specific RNTI, and has a same size as that of the downlink control information scrambled by the terminal-specific RNTI, and
wherein the downlink control information for multicast does not include each field of the Identifier for DCI formats and the TPC Command for scheduling PUCCH, but includes the PUCCH resource indicator and the PDSCH-to-HARQ feedback timing indicator among the fields which are included in the downlink control information scrambled by the terminal-specific RNTI,
when the downlink control information for multicast includes an antenna port field, a size of the antenna port field is based on a higher layer, and
when the downlink control information for multicast does not include the antenna port field, the downlink control information for multicast has a same size as that of the downlink control information scrambled by the terminal-specific RNTI.
4 . A communication system including a base station and a terminal, wherein
the base station comprises a transmitter that transmits downlink control information scrambled by a group common radio network temporary identifier (RNTI) for broadcast and downlink control information scrambled by another group common RNTI for multicast, and
the terminal comprises:
a receiver that receives the downlink control information for broadcast and the downlink control information for multicast; and
a processor that executes scheduling of a downlink data channel for broadcast in data distribution for multiple terminals based on the downlink control information for broadcast and executes scheduling of a downlink data channel for multicast in data distribution for multiple terminals based on the downlink control information for multicast,
wherein a field of the downlink control information for broadcast does not include an Identifier for Downlink Control Information (DCI) formats and a transmit power control (TPC) command for scheduling Physical Uplink Control Channel (PUCCH), further does not include at least one of a field of a PUCCH resource indicator and a field of a Physical Downlink Shared Channel-to-Hybrid Automatic Repeat Request (PDSCH-to-HARQ) feedback timing indicator, among a plurality of fields of downlink control information scrambled by a terminal-specific RNTI, and includes a field other than the fields of the downlink control information scrambled by the terminal-specific RNTI, and has a same size as that of the downlink control information scrambled by the terminal-specific RNTI, and
wherein a field of the downlink control information for multicast does not include each field of the Identifier for DCI formats and the TPC Command for scheduling PUCCH, but includes the PUCCH resource indicator and the PDSCH-to-HARQ feedback timing indicator among the fields which are included in the downlink control information scrambled by the terminal-specific RNTI,
when the downlink control information for multicast includes an antenna port field, a size of the antenna port field is based on a higher layer, and
when the downlink control information for multicast does not include the antenna port field, the downlink control information for multicast has a same size as that of the downlink control information scrambled by the terminal-specific RNTI.