Power headroom reporting for low cost machine type communication
AssigneeQUALCOMM Incorporated
InventorsMadhavan Srinivasan Vajapeyam, Wanshi Chen, Hao Xu
Life of this patent
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Abstract
Enhanced power headroom reporting (ePHR) for MTC devices. The ePHR techniques may include configuration and triggering of reporting when a corresponding change to a coverage enhancement (CE) level is likely to result. For example, ePHR may be based on parameters more directly related to PH change instead of PL changes. MTC devices may be configured with multiple thresholds for ePHR reporting that define ePHR regions associated with CE levels. In some examples, an ePHR triggered at the MAC level is used to trigger sending a request for uplink data resources. Legacy PH reporting may be disabled when ePHR is configured to reduce overhead.
Claims30
A method of wireless communication at a user equipment (UE), comprising:
- receiving, from a serving base station, an enhanced power headroom reporting configuration defining a plurality of enhanced power headroom regions;
- determining that a current power headroom is associated with a different one of the plurality of enhanced power headroom regions than a previous power headroom;
- and
- reporting the current power headroom to the serving base station.
A method of wireless communication at a user equipment (UE), comprising:
- determining, based at least in part on a power headroom for the UE for uplink communications to a serving base station, that a triggering event for enhanced power headroom reporting has occurred;
- determining that the UE does not have uplink resources allocated for transmission of data to the serving base station;
- and
- sending uplink signaling to the serving base station comprising a request for uplink data resources.
An apparatus for wireless communication at a user equipment (UE), comprising:
- a processor;
- memory in electronic communication with the processor;
- and
- instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
- receive, from a serving base station, an enhanced power headroom reporting configuration defining a plurality of enhanced power headroom regions;
- determine that a current power headroom is associated with a different one of the plurality of enhanced power headroom regions than a previous power headroom;
- and
- report the current power headroom to the serving base station.
An apparatus for wireless communication at a user equipment (UE), comprising:
- a processor;
- memory in electronic communication with the processor;
- and
- instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
- determine, based at least in part on a power headroom for the UE for uplink communications to a serving base station, that a triggering event for enhanced power headroom reporting has occurred;
- determine that the UE does not have uplink resources allocated for transmission of data to the serving base station;
- and
- send uplink signaling to the serving base station comprising a request for uplink data resources.
Dependencies are inferred from the claim text.