Exposure Reporting For Wireless Communications
Wireless communications may use one or more devices for transmission and/or reception that may lead to potentially harmful exposure. One or more safety measures may be used for wireless communication devices, such as maximum power exposure (MPE) reporting and/or related operations. An MPE report may use a power headroom report (PHR) to include an uplink transmission power reduction value associated with an MPE threshold.
1 . A method comprising:
receiving, by a wireless device, at least one configuration parameter comprising a maximum permissible exposure (MPE) threshold; and
transmitting, based on an uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a field indicating a power state associated with the uplink transmission power reduction value;
a power headroom field; and
a field indicating the uplink transmission power reduction value.
2 . The method of claim 1 , wherein the PHR further comprises a field indicating a maximum transmit power.
3 . The method of claim 2 , wherein:
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the field indicating the power state is a one-bit field of a first octet of the plurality of octets;
the power headroom field corresponds to six bits of the first octet of the plurality of octets;
the field indicating the uplink transmission power reduction value comprises two bits of a second octet of the plurality of octets; and
the field indicating the maximum transmit power corresponds to the remaining six bits of the second octet of the plurality of octets.
4 . The method of claim 1 , wherein a first value, of the field indicating the power state, indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value associated with the power state.
5 . The method of claim 1 , further comprising:
triggering, based on the uplink transmission power reduction value being greater than the MPE threshold, the PHR; and
after transmitting the PHR, canceling the triggered PHR.
6 . The method of claim 1 , further comprising:
receiving a configuration comprising a physical uplink control channel (PUCCH) resource associated with an MPE report;
transmitting, via the PUCCH resource, a scheduling request; and
receiving, based on the scheduling request, an uplink grant for transmission of the PHR,
wherein the PHR comprises a single entry PHR medium access control (MAC) control element (CE) associated with a logical channel identifier (LCID) value of a MAC subheader.
7 . The method of claim 1 , wherein the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets,
wherein the field indicating the uplink transmission power reduction value comprises two bits of an octet of the PHR MAC CE to indicate the uplink transmission power reduction value, and
wherein the two bits of the octet of the PHR MAC CE are associated with a plurality of reserved bits.
8 . A method comprising:
transmitting, by a base station, at least one configuration parameter comprising a maximum permissible exposure (MPE) threshold, wherein the MPE threshold is associated with an uplink transmission power reduction value to satisfy an exposure requirement; and
receiving, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a field indicating a power state associated with the uplink transmission power reduction value;
a power headroom field; and
a field indicating the uplink transmission power reduction value.
9 . The method of claim 8 , wherein the PHR further comprises a field indicating a maximum transmit power.
10 . The method of claim 9 , wherein:
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the field indicating the power state is a one-bit field of a first octet of the plurality of octets;
the power headroom field corresponds to six bits of the first octet of the plurality of octets;
the field indicating the uplink transmission power reduction value comprises two bits of a second octet of the plurality of octets; and
the field indicating the maximum transmit power corresponds to the remaining six bits of the second octet of the plurality of octets.
11 . The method of claim 8 , wherein a first value, of the field indicating the power state, indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value associated with the power state.
12 . The method of claim 8 , further comprising:
transmitting a configuration comprising a physical uplink control channel (PUCCH) resource;
receiving, via the PUCCH resource, a scheduling request associated with the PHR; and
transmitting, based on the scheduling request, an uplink grant for transmission of the PHR,
wherein the PHR comprises a single entry PHR medium access control (MAC) control element (CE) associated with a logical channel identifier (LCID) value of a MAC subheader.
13 . The method of claim 8 , wherein the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets,
wherein the field indicating the uplink transmission power reduction value comprises two bits of an octet of the PHR MAC CE to indicate the uplink transmission power reduction value, and
wherein the two bits of the octet of the PHR MAC CE are associated with a plurality of reserved bits.
14 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receive at least one configuration parameter comprising a maximum permissible exposure (MPE) threshold; and
transmit, based on an uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a field indicating a power state associated with the uplink transmission power reduction value;
a power headroom field; and
a field indicating the uplink transmission power reduction value.
15 . The wireless device of claim 14 , wherein:
the PHR further comprises a field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the field indicating the power state is a one-bit field of a first octet of the plurality of octets;
the power headroom field corresponds to six bits of the first octet of the plurality of octets;
the field indicating the uplink transmission power reduction value comprises two bits of a second octet of the plurality of octets; and
the field indicating the maximum transmit power corresponds to the remaining six bits of the second octet of the plurality of octets.
16 . The wireless device of claim 14 , wherein a first value, of the field indicating the power state, indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value associated with the power state.
17 . The wireless device of claim 14 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:
receive a configuration comprising a physical uplink control channel (PUCCH) resource associated with an MPE report;
trigger, based on the uplink transmission power reduction value being greater than the MPE threshold, the PHR;
transmit, via the PUCCH resource, a scheduling request;
receive, based on the scheduling request, an uplink grant for transmission of the PHR; and
after transmitting the PHR, cancel the triggered PHR, and
wherein the PHR comprises a single entry PHR medium access control (MAC) control element (CE) associated with a logical channel identifier (LCID) value of a MAC subheader.
18 . The wireless device of claim 14 , wherein the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets,
wherein the field indicating the uplink transmission power reduction value comprises two bits of an octet of the PHR MAC CE to indicate the uplink transmission power reduction value, and
wherein the two bits of the octet of the PHR MAC CE are associated with a plurality of reserved bits.
19 . A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the base station to:
transmit at least one configuration parameter comprising a maximum permissible exposure (MPE) threshold, wherein the MPE threshold is associated with an uplink transmission power reduction value to satisfy an exposure requirement; and
receive, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a field indicating a power state associated with the uplink transmission power reduction value;
a power headroom field; and
a field indicating the uplink transmission power reduction value.
20 . The base station of claim 19 , wherein:
the PHR further comprises a field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the field indicating the power state is a one-bit field of a first octet of the plurality of octets;
the power headroom field corresponds to six bits of the first octet of the plurality of octets;
the field indicating the uplink transmission power reduction value comprises two bits of a second octet of the plurality of octets; and
the field indicating the maximum transmit power corresponds to the remaining six bits of the second octet of the plurality of octets.
21 . The base station of claim 19 , wherein a first value, of the field indicating the power state, indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value associated with the power state.
22 . The base station of claim 19 , wherein the instructions, when executed by the one or more processors, further configure the base station to:
transmit a configuration comprising a physical uplink control channel (PUCCH) resource;
receive, via the PUCCH resource, a scheduling request; and
transmit, based on the scheduling request, an uplink grant for transmission of the PHR,
wherein the PHR comprises a single entry PHR medium access control (MAC) control element (CE) associated with a logical channel identifier (LCID) value of a MAC subheader.
23 . The base station of claim 19 , wherein the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets,
wherein the field indicating the uplink transmission power reduction value comprises two bits of an octet of the PHR MAC CE to indicate the uplink transmission power reduction value, and
wherein the two bits of the octet of the PHR MAC CE are associated with a plurality of reserved bits.