Maximum permissible exposure (MPE) uplink (UL) budget prioritization for physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH)
Systems, methods, apparatuses, and computer program products for maximum permissible exposure (MPE) uplink (UL) budget prioritization for physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) are provided. For example, with a restricted UL power budget under MPE event duration, the user equipment (UE) may prioritize the transmissions of control signals (e.g., PUCCH, medium access control control element (MAC CE), or PUSCH carrying measurement report only) over PUSCH carrying UL user plane traffic.
1 . A user equipment (UE) method, comprising:
at least one processor; and
at least one memory, including instructions stored thereon, which when executed by the at least one processor cause the UE to perform operations at least including:
receiving, by the UE, a configuration of at least two rules associated with
applying power back off to an uplink transmission, wherein the at least two rules comprise at least one rule for a maximum permissible exposure event and at least one rule for a non-maximum permissible exposure event, wherein the at least one rule for the maximum permissible exposure event differentiates between control plane traffic and user plane traffic and prioritizes the control plane traffic over the user plane traffic, wherein the at least one rule for the non-maximum permissible exposure event is associated with causing the UE to continue with the uplink transmission without applying the power backoff due to the maximum permissible exposure event, wherein the at least one rule for the maximum permissible exposure event is configured by a network node, wherein the at least one rule for the maximum permissible exposure event indicates a power distribution for the control plane traffic and the user plane traffic of the uplink transmission when the maximum permissible exposure event occurs, and wherein the at least one rule for the maximum permissible exposure event provides different power distributions for different power management-maximum power reduction values or for different groups of power management-maximum power reduction values;
detecting the maximum permissible exposure event;
applying, to the uplink transmission, the at least one rule for the maximum permissible exposure event detecting a user or object in proximity of an antenna of the user equipment, wherein the applying of the at least one rule for the maximum permissible exposure event further comprises allocating power to:
at least one physical uplink shared channel transmission,
at least one physical uplink control channel transmission,
at least one physical random access channel transmission, and
at least one sounding reference signal transmission, and
wherein the allocating of the power further comprises allocating the power to:
the at least one physical random access channel transmission on a primary cell,
the at least one physical uplink control channel transmission with a hybrid automatic repeat request-acknowledgement or scheduling request information according to a power management-maximum power reduction level,
the at least one physical uplink shared channel transmission with power head room or measurement reporting information according to the power management-maximum power reduction level,
the at least one sounding reference signal transmission with aperiodic sounding reference signal having a higher priority than semi-persistent or periodic sounding reference signal or the at least one physical random access channel transmission on a serving cell other than the primary cell,
the at least one physical uplink control channel transmission with channel state information or the at least one physical uplink shared channel transmission with the channel state information, and
the at least one physical uplink shared channel transmission without the hybrid automatic repeat request-acknowledgement information or the channel state information,
wherein the applying of the at least one rule for the maximum permissible exposure event further comprises:
prioritizing a physical uplink control channel; and
using a scheduling request within the physical uplink control channel to activate or deactivate a power distribution scheme for the maximum permissible exposure event,
wherein the applying of the at least one rule for the maximum permissible exposure event further comprises: re-prioritizing a physical uplink shared channel according to a payload for the maximum permissible exposure event;
determining a distance that the detected user or object is from the antenna;
transmitting the uplink transmission to a network node, wherein the uplink transmission comprises reporting of the maximum permissible exposure event; and
receiving, from the network node, an indication to change power distributions after transmitting the reporting.