Cross carrier beam indication
A method of operating a user equipment (UE) includes receiving configuration information for a list of transmission configuration indicator (TCI) states, a list of TCI state code points, and cross carrier scheduling and receiving a downlink control information (DCI) format including (i) a carrier indicator field and (ii) a transmission configuration indication field indicating a TCI state code point. The TCI state code point is from the list of TCI state code points and indicates a TCI state for a first carrier and a TCI state for a second carrier. The method further includes applying the indicated TCI state code point for a first carrier and a second carrier and receiving or transmitting, on the first carrier and the second carrier, downlink (DL) channels or uplink (UL) channels, respectively, based on quasi-co-location properties or spatial properties corresponding to the indicated TCI state code point.
1 . A user equipment (UE), comprising:
a transceiver configured to:
receive configuration information for a list of transmission configuration indicator (TCI) states,
receive configuration information for a list of TCI state code points, wherein a TCI state code point from the list of TCI state code points indicates a TCI state for a first carrier and a TCI state for a second carrier,
receive configuration information for cross carrier scheduling,
receive a downlink control information (DCI) format including (i) a carrier indicator field associated with the configuration information for cross carrier scheduling and (ii) a transmission configuration indication field indicating the TCI state code point;
receive a list of component carriers that corresponds to a same TCI state identifier (ID), wherein a carrier indicated by the carrier indicator field of the DCI format is included in the list of component carriers; and
a processor operably coupled to the transceiver, the processor configured to apply the indicated TCI state code point for the first carrier and the second carrier and all carriers in the list of components carriers,
wherein the transceiver is further configured to receive or transmit, on the first and second carriers, downlink (DL) channels or uplink (UL) channels, respectively, based on quasi-co-location properties or spatial properties corresponding to the indicated TCI state code point,
wherein the application of the indicated TCI state code point for the carriers in the list of component carriers is after a configured time from a last symbol of a channel conveying hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback corresponding to the DCI format, and
wherein the configured time depends on a carrier with a smallest sub-carrier spacing among a carrier on which the DCI format was received and the carriers in the list of component carriers that use the indicated TCI state code point.
2 . The UE of claim 1 , wherein:
the first carrier is a carrier on which the DCI format is received, and
the second carrier is a carrier indicated by the carrier indicator field of the DCI format.
3 . The UE of claim 1 , wherein the configured time further depends on a carrier with a smallest sub-carrier spacing between a carrier on which the DCI format was received and a carrier indicated by the DCI format.
4 . The UE of claim 1 , wherein the TCI state code point indicates:
a DL, UL, or Joint TCI state for the first carrier, and
a DL, UL, or Joint TCI state for the second carrier.
5 . The UE of claim 1 , wherein the DCI format is DCI Format 1_1 or DCI Format 1_2 carrying the TCI state code point with a DL assignment.
6 . The UE of claim 1 , wherein the DCI format is DCI Format 1_1 or DCI Format 1_2 carrying the TCI state code point without a DL assignment.
7 . A base station (BS), comprising:
a transceiver configured to:
transmit configuration information for a list of transmission configuration indicator (TCI) states,
transmit configuration information for a list of TCI state code points, wherein a TCI state code point from the list of TCI state code points indicates a TCI state for a first carrier and a TCI state for a second carrier,
transmit configuration information for cross carrier scheduling,
transmit a downlink control information (DCI) format including (i) a carrier indicator field associated with the configuration information for cross carrier scheduling and (ii) a transmission configuration indication field indicating the TCI state code point,
transmit a list of component carriers that corresponds to a same TCI state identifier (ID), wherein a carrier indicated by the carrier indicator field of the DCI format is included in the list of component carriers; and
a processor operably coupled to the transceiver, the processor configured to apply the indicated TCI state code point for the first carrier and the second carrier and all carriers in the list of components carriers,
wherein the transceiver is further configured to transmit or receive, on the first carrier and the second carrier, downlink (DL) channels or uplink (UL) channels, respectively, based on quasi-co-location properties or spatial properties corresponding to the indicated TCI state code point,
wherein the application of the indicated TCI state code point for the carriers in the list of component carrier is after a configured time from a last symbol of a channel conveying hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback corresponding to the DCI format, and
wherein the configured time depends on a carrier with a smallest sub-carrier spacing among a carrier on which the DCI format was transmitted and the carriers in the list of component carriers that use the indicated TCI state code point.
8 . The BS of claim 7 , wherein:
the first carrier is a carrier on which the DCI format is transmitted, and
the second carrier is a carrier indicated by the carrier indicator field of the DCI format.
9 . The BS of claim 7 , wherein the configured time further depends on a carrier with a smallest sub-carrier spacing between a carrier on which the DCI format was transmitted and a carrier indicated by the DCI format.
10 . The BS of claim 7 , wherein the TCI state code point indicates:
a DL, UL, or Joint TCI state for the first carrier, and
a DL, or UL, or Joint TCI state for the second carrier.
11 . The BS of claim 7 , wherein the DCI format is DCI Format 1_1 or DCI Format 1_2 carrying the TCI state code point with a DL assignment.
12 . The BS of claim 7 , wherein the DCI format is DCI Format 1_1 or DCI Format 1_2 carrying the TCI state code point without a DL assignment.
13 . A method of operating a user equipment (UE), the method comprising:
receiving configuration information for a list of transmission configuration indicator (TCI) states;
receiving configuration information for a list of TCI state code points, wherein a TCI state code point from the list of TCI state code points indicates a TCI state for a first carrier and a TCI state for a second carrier;
receiving configuration information for cross carrier scheduling;
receiving a downlink control information (DCI) format including (i) a carrier indicator field associated with the configuration information for cross carrier scheduling and (ii) a transmission configuration indication field indicating the TCI state code point;
receiving a list of component carriers that corresponds to a same TCI state identifier (ID), wherein a carrier indicated by the carrier indicator field of the DCI format is included in the list of component carriers;
applying the indicated TCI state code point for the first carrier and the second carrier and all carriers in the list of components carriers; and
receiving or transmitting, on the first carrier and the second carrier, downlink (DL) channels or uplink (UL) channels, respectively, based on quasi-co-location properties or spatial properties corresponding to the indicated TCI state code point,
wherein the application of the indicated TCI state code point for the carriers in the list of component carriers is after a configured time from a last symbol of a channel conveying hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback corresponding to the DCI format, and
wherein the configured time depends on a carrier with a smallest sub-carrier spacing among a carrier on which the DCI format was received and the carriers in the list of component carriers that use the indicated TCI state code point.
14 . The method of claim 13 , wherein:
the first carrier is a carrier on which the DCI format is received, and
the second carrier is a carrier indicated by the carrier indicator field of the DCI format.
15 . The method of claim 13 , wherein the configured time further depends on a carrier with a smallest sub-carrier spacing between a carrier on which the DCI format was received and a carrier indicated by the DCI format.
16 . The method of claim 13 , wherein the TCI state code point indicates:
a DL, UL, or Joint TCI state for the first carrier, and
a DL, UL, or Joint TCI state for the second carrier.
17 . The method of claim 13 , wherein:
the DCI format is DCI Format 1_1 or DCI Format 1_2 carrying the TCI state code point with a DL assignment, or
the DCI format is DCI Format 1_1 or DCI Format 1_2 carrying the TCI state code point without a DL assignment.