Method and apparatus for multi-transmission/reception point power headroom reporting in a wireless communication system
地域：
Taipei
摘要
A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives an uplink (UL) grant. The UL grant is indicative of a first Physical Uplink Shared Channel (PUSCH) transmission on a first Transmission/Reception Point (TRP) of a first cell. The UL grant is not indicative of a PUSCH transmission on a second TRP of the first cell. The UE transmits a Power Headroom Reporting (PHR) Medium Access Control (MAC) Control Element (CE). Based on the UL grant, the PHR MAC CE is indicative of a first power headroom (PH), associated with the first TRP, based on a real PUSCH transmission, and is indicative of a second PH, associated with the second TRP, based on a reference PUSCH transmission.
說(shuō)明書
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The Single Entry PHR MAC CE is identified by a MAC subheader with LCID as specified in Table 6.2.1-2.
It has a fixed size and consists of two octets defined as follows (FIG. 6.1.3.8-1):
-
- R: Reserved bit, set to 0;
- Power Headroom (PH): This field indicates the power headroom level. The length of the field is 6 bits. The reported PH and the corresponding power headroom levels are shown in Table 6.1.3.8-1 below (the corresponding measured values in dB are specified in TS 38.133 [11]);
- P: If mpe-Reporting is configured this field indicates the applied power backoff to meet MPE requirements, as specified in TS 38.101-2 [15]. The MAC entity shall set the P field to 0 if the backoff is less than P_MPR_0 as specified in TS 38.133 [11] and set the P field to 1 otherwise. If mpe-Reporting is not configured this field indicates whether the MAC entity applies power backoff due to power management (as allowed by P-MPRc as specified in TS 38.101-1 [14], TS 38.101-2 [15], and TS 38.101-3 [16]). The MAC entity shall set the P field to 1 if the corresponding PCMAX,f,c field would have had a different value if no power backoff due to power management had been applied;
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