Transmission configuration indicator (TCI) configuration of a component carrier (CC)
Aspects of the disclosure are directed to transmission configuration indicator (TCI) configuration of a component carrier (CC). For example, aspects are directed to aligning TCI configurations and physical cell identifier (PCI) lists between multiple CCs. Some examples include receiving, from a serving cell, a first TCI configuration for a first CC, wherein the first TCI configuration comprises a first TCI pool comprising at least one TCI state mapped to one of a PCI of the serving cell or a PCI index corresponding to a neighboring non-serving cell. Examples may also include communicating wireless signaling between a user equipment (UE) and the serving cell via a second CC using the at least one TCI state of the first TCI pool.
1 . A user equipment (UE) configured for wireless communication, comprising:
a memory comprising instructions; and
one or more processors configured to execute the instructions and cause the UE to:
receive, from a serving cell, a first transmission configuration indicator (TCI) configuration associated with a first component carrier (CC), wherein the first TCI configuration comprises a first TCI pool comprising: an indication of a first TCI state, an indication of a first physical cell identifier (PCI) index associated with the serving cell, an indication of a mapping between the first TCI state and the first PCI index, an indication of a second TCI state, an indication of a second PCI index associated with a neighboring non-serving cell, and an indication of a mapping between the second TCI state and the second PCI index, wherein the first TCI configuration further comprises a first PCI list including a first number of PCI indices; and
communicate wireless signaling between the UE and the serving cell via a second CC using the first TCI state of the first TCI pool, wherein the second CC is configured with a second PCI list enabling inter-cell beam management (BM) and including a second number of PCI indices, wherein the first number of PCI indices is less than the second number of PCI indices, and wherein the first TCI state is used to communicate the wireless signaling via the second CC based on the UE not being configured with a TCI pool associated with the second CC.
2 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
receive, from the serving cell, a second TCI configuration for the second CC configuring the second CC to use the first TCI pool for a future communication of wireless signaling.
3 . The UE of claim 1 , wherein the first TCI configuration further comprises the first PCI list comprising at least one PCI mapped to the second PCI index, and wherein the one or more processors are further configured to cause the UE to:
receive, from the serving cell, a second TCI configuration for the second CC, wherein the second TCI configuration comprises the second PCI list.
4 . The UE of claim 1 , wherein the first TCI configuration comprises multiple TCI pools for the first CC, wherein the multiple TCI pools include a second TCI pool and the first TCI pool.
5 . The UE of claim 4 , wherein the second TCI pool is configured for intra-cell beam management (BM) and comprises at least one TCI state mapped to the first PCI index of the serving cell, and wherein the first TCI pool is configured for inter-cell BM and comprises at least one TCI state mapped to the second PCI index corresponding to the neighboring non-serving cell.
6 . The UE of claim 5 , wherein the one or more processors are further configured to cause the UE to:
communicate the wireless signaling between the UE and the serving cell via the first CC using the first TCI pool, wherein the wireless signaling between the UE and the serving cell via the second CC is communicated via the first TCI state mapped to the first PCI index of the serving cell.
7 . The UE of claim 1 , wherein the first TCI configuration further comprises the first PCI list comprising: (i) a first PCI corresponding to the first PCI index mapped to the first TCI state of the first TCI pool, and (ii) a second PCI corresponding to the second PCI index mapped to the second TCI state of the first TCI pool, and wherein the one or more processors are further configured to cause the UE to:
configure the second CC with the first TCI pool.
8 . The UE of claim 7 , wherein the one or more processors are further configured to cause the UE to:
receive, from the serving cell, signaling activating the second TCI state for UE communications, wherein the first TCI state was previously activated; and
if the second CC is configured with the second PCI list omitting the second PCI index, then continue to communicate the wireless signaling between the UE and the serving cell via the second CC using the first TCI state instead of the second TCI state; or
if the second CC is configured with the second PCI list comprising the second PCI index, then communicate wireless signaling between the UE and the serving cell via the second CC using the second TCI state.
9 . The UE of claim 1 , wherein the first TCI configuration further comprises the first PCI list comprising a first PCI of a non-serving cell, and wherein the wireless signaling communicated between the UE and the serving cell via the second CC uses the first TCI pool and the first PCI list.
10 . The UE of claim 9 , wherein the second CC is not configured with a dedicated TCI pool.
11 . The UE of claim 1 , wherein the first TCI configuration further comprises the first PCI list comprising a first PCI of a non-serving cell, and wherein the first PCI list omits a second PCI of the serving cell.
12 . The UE of claim 1 , wherein the second CC is not configured with a dedicated TCI pool, wherein the first TCI configuration further comprises the first PCI list comprising a first PCI mapped to the first PCI index of the first TCI pool, and wherein the one or more processors are further configured to cause the UE to:
receive a second TCI configuration for the second CC comprising the second PCI list, wherein the wireless signaling communicated between the UE and the serving cell is performed using the first TCI pool and the first PCI list instead of the second PCI list.
13 . A network node configured as a serving cell for wireless communication with a user equipment (UE), comprising:
a memory comprising instructions; and
one or more processors configured to execute the instructions and cause the network node to:
transmit, to the UE, a first transmission configuration indicator (TCI) configuration associated with a first component carrier (CC) of the UE, wherein the first TCI configuration comprises a first TCI pool comprising: an indication of a first TCI state, an indication of a first physical cell identifier (PCI) index associated with the serving cell, an indication of a mapping between the first TCI state and the first PCI index, an indication of a second TCI state, an indication of a second PCI index associated with a neighboring non-serving cell, and an indication of a mapping between the second TCI state and the second PCI index, wherein the first TCI configuration further comprises a first PCI list including a first number of PCI indices;
transmit, to the UE, a second TCI configuration for a second CC of the UE; and
communicate wireless signaling between the network node and the UE via the second CC of the UE using the first TCI state of the first TCI pool, wherein the second TCI configuration configures the second CC with a second PCI list enabling inter-cell beam management (BM) and including a second number of PCI indices, wherein the first number of PCI indices is less than the second number of PCI indices, and wherein the first TCI state is used to communicate the wireless signaling via the second CC based on the UE not being configured with a TCI pool associated with the second CC.
14 . The network node of claim 13 , wherein the one or more processors are further configured to cause the network node to:
transmit, to the UE, the second TCI configuration for the second CC configuring the second CC to use the first TCI pool for a future communication of wireless signaling.
15 . The network node of claim 13 , wherein the first TCI configuration further comprises the first PCI list comprising at least one PCI mapped to the second PCI index, and wherein the one or more processors are further configured to cause the network node to:
transmit, to the UE, the second TCI configuration for the second CC, wherein the second TCI configuration comprises the second PCI list.
16 . The network node of claim 13 , wherein the first TCI configuration comprises multiple TCI pools for the first CC, wherein the multiple TCI pools include a second TCI pool and the first TCI pool.
17 . The network node of claim 16 , wherein the second TCI pool is configured for intra-cell beam management (BM) and comprises at least one TCI state mapped to the first PCI index of the serving cell, and wherein the first TCI pool is configured for inter-cell BM and comprises at least one TCI state mapped to the second PCI index corresponding to the neighboring non-serving cell.
18 . The network node of claim 17 , wherein the one or more processors are further configured to cause the network node to:
communicate the wireless signaling between the UE and the serving cell via the first CC using the first TCI pool, wherein the wireless signaling between the UE and the serving cell via the second CC is communicated via the first TCI state mapped to the first PCI index of the serving cell.
19 . The network node of claim 13 , wherein the first TCI configuration further comprises the first PCI list comprising: (i) a first PCI corresponding to the first PCI index mapped to the first TCI state of the first TCI pool, and (ii) a second PCI corresponding to the second PCI index mapped to the second TCI state of the first TCI pool, and wherein the second CC is configured with the first TCI pool.
20 . The network node of claim 19 , wherein the one or more processors are further configured to cause the network node to:
transmit, to the UE, signaling activating the second TCI state for UE communications, wherein the first TCI state was previously activated; and
if the second CC is configured with the second PCI list omitting the second PCI index, then continue to communicate the wireless signaling with the UE via the second CC using the first TCI state instead of the second TCI state; or
if the second CC is configured with the second PCI list comprising the second PCI index, then communicate wireless signaling with the UE via the second CC using the second TCI state.
21 . The network node of claim 13 , wherein the first TCI configuration further comprises the first PCI list comprising a first PCI of a non-serving cell, and wherein the wireless signaling communicated between the UE and the serving cell via the second CC uses the first TCI pool and the first PCI list.
22 . The network node of claim 21 , wherein the second CC is not configured with a dedicated TCI pool.
23 . The network node of claim 13 , wherein the second CC is not configured with a dedicated TCI pool, wherein the first TCI configuration further comprises the first PCI list comprising a first PCI mapped to the first PCI index of the first TCI pool, and wherein the one or more processors are further configured to cause the network node to:
transmit, to the UE, the second TCI configuration for the second CC comprising the second PCI list, wherein the wireless signaling communicated between the network node and the UE is performed using the first TCI pool and the first PCI list instead of the second PCI list.
24 . A method of wireless communication at a user equipment (UE), comprising:
receiving, from a serving cell, a first transmission configuration indicator (TCI) configuration associated with a first component carrier (CC), wherein the first TCI configuration comprises a first TCI pool comprising: an indication of a first TCI state, an indication of a first physical cell identifier (PCI) index associated with the serving cell, an indication of a mapping between the first TCI state and the first PCI index, an indication of a second TCI state, an indication of a second PCI index associated with a neighboring non-serving cell, and an indication of a mapping between the second TCI state and the second PCI index, wherein the first TCI configuration further comprises a first PCI list including a first number of PCI indices; and
communicating wireless signaling between the UE and the serving cell via a second CC using the first TCI state of the first TCI pool, wherein the second CC is configured with a second PCI list enabling inter-cell beam management (BM) and including a second number of PCI indices, wherein the first number of PCI indices is less than the second number of PCI indices, and wherein the first TCI state is used to communicate the wireless signaling via the second CC based on the UE not being configured with a TCI pool associated with the second CC.
25 . A method of wireless communication at a network node configured as a serving cell for a user equipment (UE), comprising:
transmitting, to the UE, a first transmission configuration indicator (TCI) configuration associated with a first component carrier (CC) of the UE, wherein the first TCI configuration comprises a first TCI pool comprising: an indication of a first TCI state, an indication of a first physical cell identifier (PCI) index associated with the serving cell, an indication of a mapping between the first TCI state and the first PCI index, an indication of a second TCI state, an indication of a second PCI index associated with a neighboring non-serving cell, and an indication of a mapping between the second TCI state and the second PCI index, wherein the first TCI configuration further comprises a first PCI list including a first number of PCI indices;
transmit, to the UE, a second TCI configuration for a second CC of the UE; and
communicating wireless signaling between the network node and the UE via the second CC of the UE using the first TCI state of the first TCI pool, wherein the second TCI configuration configures the second CC with a second PCI list enabling inter-cell beam management (BM) and including a second number of PCI indices, wherein the first number of PCI indices is less than the second number of PCI indices, and wherein the first TCI state is used to communicate the wireless signaling via the second CC based on the UE not being configured with a TCI pool associated with the second CC.