Beam recovery frame structure and recovery request for communication systems
An apparatus is configured to be employed within a base station. The apparatus comprises baseband circuitry which includes a radio frequency (RF) interface and one or more processors. The one or more processors are configured to select one or more recovery channels based on one or more recovery factors; determine a beam recovery frame structure using the selected one or more recovery channels and based at least partially on beam correspondence capabilities; and provide the selected one or more recovery channels and the determined beam recovery frame structure to the RF interface for transmission to a user equipment (UE) device.
1 . An apparatus comprising:
a memory interface; and
one or more processors configured to:
receive a higher layer signaling message with one or more recovery channel factors;
determine that a physical uplink control channel (PUCCH) resource is un-configured for a recovery signal;
determine a first recovery channel and a second recovery channel based on the one or more recovery channel factors and the determination that the PUCCH resource is un-configured, wherein the first recovery channel and the second recovery channel are different from each other, wherein the first or the second recovery channel is a physical random access channel (PRACH) and the one or more recovery channel factors includes beam correspondence capabilities, directionality of beams associated with the apparatus, and a recovery signal type; and
transmit the recovery signal in the first recovery channel and the second recovery channel.
2 . The apparatus of claim 1 , wherein the higher layer signaling message indicates a beam recovery frame structure.
3 . The apparatus of claim 1 , wherein the one or more recovery channel factors are associated with a synchronization signal block (SSB) that identifies a new beam.
4 . The apparatus of claim 1 , wherein the beam correspondence capabilities include a beam correspondence capability of one or more of a user equipment (UE) or a base station (BS).
5 . The apparatus of claim 1 , wherein the one or more recovery channel factors are associated with a directionality of one or more antennas associated with the apparatus.
6 . The apparatus of claim 5 , wherein the directionality of the one or more antennas is omnidirectional.
7 . The apparatus of claim 1 , wherein the one or more recovery channel factors are received in one of a synchronization signal block (SSB) of a random access channel (RACH) message 3 (Msg3) or a channel state information reference signal (CSI-RS) of a RACH Msg3.
8 . A baseband processor, comprising:
one or more processors configured to:
receive a higher layer signaling message with one or more recovery channel factors;
determine that a physical uplink control channel (PUCCH) resource is un-configured for a recovery signal;
determine a first recovery channel and a second recovery channel based on the one or more recovery channel factors and the determination that the PUCCH resource is un-configured, wherein the first recovery channel and the second recovery channel are different from each other, wherein the first or the second recovery channel is a physical random access channel (PRACH), and the one or more recovery channel factors includes beam correspondence capabilities, directionality of beams associated with the baseband processor, and a recovery signal type; and
output, for transmission, the recovery signal in the first recovery channel and the second recovery channel.
9 . The baseband processor of claim 8 , wherein the one or more processors are further configured to:
configure a maintained beam; and
the recovery signal is output, for transmission, in response to a beam recovery process initiated when a quality of the maintained beam falls below a threshold.
10 . The baseband processor of claim 8 , wherein the one or more recovery channel factors are further associated with a synchronization signal block (SSB) that identifies a new beam.
11 . The baseband processor of claim 8 , wherein the beam correspondence capabilities include a beam correspondence capability of one or more of a user equipment (UE) or a base station (BS).
12 . A user equipment (UE), comprising:
a radio frequency (RF) transceiver and one or more processors configured to, when executing instructions stored in a memory, cause the UE to:
receive a higher layer signaling message with one or more recovery channel factors;
determine that a physical uplink control channel (PUCCH) resource is un-configured for a recovery signal;
determine a first recovery channel and a second recovery channel based on the one or more recovery channel factors and the determination that the PUCCH resource is un-configured, wherein the first recovery channel and the second recovery channel are different from each other, wherein the first or the second recovery channel is a physical random access channel (PRACH), and the one or more recovery channel factors includes beam correspondence capabilities, directionality of beams associated with the UE, and a recovery signal type; and
transmit, by the RF transceiver, the recovery signal in the first recovery channel and the second recovery channel.
13 . The UE of claim 12 , wherein the higher layer signaling message indicates a beam recovery frame structure.
14 . The UE of claim 12 , wherein the one or more recovery channel factors are associated with a synchronization signal block (SSB) that identifies a new beam.
15 . The UE of claim 12 , wherein the beam correspondence capabilities include a beam correspondence capability of one or more of the UE or a base station (BS).
16 . The apparatus of claim 1 , wherein the one or more processors are further configured to:
configure a maintained beam; and
the recovery signal is transmitted in response to a beam recovery process initiated when a quality of the maintained beam falls below a threshold.
17 . The baseband processor of claim 8 , wherein the higher layer signaling message indicates a beam recovery frame structure.
18 . The baseband processor of claim 8 , wherein the one or more recovery channel factors are received in one of a synchronization signal block (SSB) of a random access channel (RACH) message 3 (Msg3) or a channel state information reference signal (CSI-RS) of a RACH Msg3, and the SSB or the CSI-RS identifies a new beam.
19 . The UE of claim 12 , wherein the one or more processors are further configured to:
configure a maintained beam; and
the recovery signal is transmitted in response to a beam recovery process initiated when a quality of the maintained beam falls below a threshold.
20 . The UE of claim 12 , wherein the one or more recovery channel factors are received in one of a synchronization signal block (SSB) of a random access channel (RACH) message 3 (Msg3) or a channel state information reference signal (CSI-RS) of a RACH Msg3, and the SSB or the CSI-RS identifies a new beam.