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, an exposure reporting configuration comprising a maximum permissible exposure (MPE) threshold;
determining an uplink transmission power reduction value to satisfy an exposure requirement; and
transmitting, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
2. The method of claim 1 , wherein the PHR further comprises a fourth 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 first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field 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 first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for 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. A method comprising:
transmitting, by a base station, an exposure reporting configuration 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;
receiving a scheduling request associated with a power headroom report (PHR); and
receiving, based on the uplink transmission power reduction value satisfying the MPE threshold, the PHR comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
8. The method of claim 7 , wherein the PHR further comprises a fourth field indicating a maximum transmit power.
9. The method of claim 8 , wherein:
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field corresponds to the remaining six bits of the second octet of the plurality of octets.
10. The method of claim 7 , wherein a first value of the first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
11. The method of claim 7 , further comprising:
transmitting a configuration comprising a physical uplink control channel (PUCCH) resource; and
transmitting, based on the scheduling request, an uplink grant for transmission of the PHR,
wherein the receiving the scheduling request comprises receiving, via the PUCCH resource, the scheduling request, 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.
12. A method comprising:
receiving, by a wireless device, an exposure reporting configuration comprising a maximum permissible exposure (MPE) threshold;
determining an uplink transmission power reduction value to satisfy an exposure requirement; and
transmitting, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a first field indicating a PHR value associated with a cell;
a second field indicating the uplink transmission power reduction value; and
a third field indicating a maximum transmit power.
13. The method of claim 12 , wherein the PHR further comprises a fourth field indicating a power state associated with the uplink transmission power reduction value.
14. The method of claim 12 , wherein:
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a power headroom (PH) field corresponding to six bits of a first octet of the plurality of octets;
the second field comprises two bits of a second octet of the plurality of octets; and
the third field corresponds to the remaining six bits of the second octet of the plurality of octets.
15. The method of claim 14 , wherein:
the PHR further comprises a fourth field indicating a power state; and
the fourth field corresponds to one bit of the remaining two bits of the first octet of the plurality of octets.
16. The method of claim 15 , wherein a first value of the fourth field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
17. The method of claim 12 , further comprising:
triggering, based on the uplink transmission power reduction value being greater than the MPE threshold, the PHR.
18. The method of claim 17 , further comprising:
after transmitting the PHR, canceling the triggered PHR.
19. The method of claim 12 , 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.
20. The method of claim 12 , 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.
21. 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 an exposure reporting configuration comprising a maximum permissible exposure (MPE) threshold;
determine an uplink transmission power reduction value to satisfy an exposure requirement; and
transmit, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
22. The wireless device of claim 21 , wherein:
the PHR further comprises a fourth field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field corresponds to the remaining six bits of the second octet of the plurality of octets.
23. The wireless device of claim 21 , wherein a first value of the first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
24. The wireless device of claim 21 , 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.
25. 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 an exposure reporting configuration 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;
receive a scheduling request associated with a power headroom report (PHR); and
receive, based on the uplink transmission power reduction value satisfying the MPE threshold, the PHR comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
26. The base station of claim 25 , wherein:
the PHR further comprises a fourth field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field corresponds to the remaining six bits of the second octet of the plurality of octets.
27. The base station of claim 25 , wherein a first value of the first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
28. The base station of claim 25 , 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; and
transmit, based on the scheduling request, an uplink grant for transmission of the PHR,
wherein the instructions, when executed by the one or more processors, configure the base station to receive the scheduling request by receiving, via the PUCCH resource, the scheduling request, 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.
29. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive an exposure reporting configuration comprising a maximum permissible exposure (MPE) threshold;
determine an uplink transmission power reduction value to satisfy an exposure requirement; and
transmit, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
30. The non-transitory computer-readable medium of claim 29 , wherein:
the PHR further comprises a fourth field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field corresponds to the remaining six bits of the second octet of the plurality of octets.
31. The non-transitory computer-readable medium of claim 29 , wherein a first value of the first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
32. The non-transitory computer-readable medium of claim 29 , wherein the instructions, when executed, 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.
33. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:
transmit an exposure reporting configuration 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;
receive a scheduling request associated with a power headroom report (PHR); and
receive, based on the uplink transmission power reduction value satisfying the MPE threshold, the PHR comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
34. The non-transitory computer-readable medium of claim 33 , wherein:
the PHR further comprises a fourth field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field corresponds to the remaining six bits of the second octet of the plurality of octets.
35. The non-transitory computer-readable medium of claim 33 , wherein a first value of the first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
36. The non-transitory computer-readable medium of claim 33 , wherein the instructions, when executed, further configure the base station to:
transmit a configuration comprising a physical uplink control channel (PUCCH) resource; and
transmit, based on the scheduling request, an uplink grant for transmission of the PHR,
wherein the instructions, when executed, configure the base station to receive the scheduling request by receiving, via the PUCCH resource, the scheduling request, 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.
37. A system comprising:
a base station; and
a wireless device,
wherein the base station is configured to:
transmit an exposure reporting configuration comprising a maximum permissible exposure (MPE) threshold; and
wherein the wireless device is configured to:
determine an uplink transmission power reduction value to satisfy an exposure requirement; and
transmit, based on the uplink transmission power reduction value satisfying the MPE threshold, a power headroom report (PHR) comprising:
a first field indicating a power state associated with the uplink transmission power reduction value;
a second field indicating a PHR value associated with a cell; and
a third field indicating the uplink transmission power reduction value.
38. The system of claim 37 , wherein:
the PHR further comprises a fourth field indicating a maximum transmit power;
the PHR is a PHR medium access control (MAC) control element (CE) comprising a plurality of octets;
the first field is a one-bit field of a first octet of the plurality of octets;
the second field is a power headroom (PH) field corresponding to six bits of the first octet of the plurality of octets;
the third field comprises two bits of a second octet of the plurality of octets; and
the fourth field corresponds to the remaining six bits of the second octet of the plurality of octets.
39. The system of claim 37 , wherein a first value of the first field indicates the power state, and wherein the uplink transmission power reduction value corresponds to a power backoff value for the power state.
40. The system of claim 37 , wherein the base station is further configured to:
transmit a configuration comprising a physical uplink control channel (PUCCH) resource associated with an MPE report; and
transmit, based on a scheduling request, an uplink grant for transmission of the PHR,
wherein the wireless device is further configured to:
trigger, based on the uplink transmission power reduction value being greater than the MPE threshold, the PHR;
transmit, via the PUCCH resource, the scheduling request; 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.