name: UPH
full_form: UE Power Headroom
context: and CLTD modes is defined as follows: The serving grant SG and SINR difference SD parameters are calculated and signaled by the Node B to the UE for each TTI. The SG parameter defines the E-DPDCH power relative to the DPCCH as for the legacy power-based approach. An illustration of the transmit power level and the SG and SD parameters for the SINR-based scheduling of a SIMO or CLTD transmission is given in Figure 5.7.3.1-2. Figure 5.7.3.1-2: SINR-based scheduling using SG and SD parameters for the SIMO and CLTD transmission modes E-TFC selection is done using the legacy procedure, but the SD parameter is applied to decrease the SG grant prior to passing it to the E-TFC. However, the actual transmit power is not affected by SD. The SD is selected so that the combination of the SG and SD allows the UE to estimate the post-receiver SINR level at the Node B and select the E-TFC that would provide the maximum throughput at the required BLER performance. The mechanism considering 2-loop
description: UE Power Headroom (UPH) is a parameter that represents the ratio of the maximum UE transmission power and the corresponding DPCCH code power of a frequency. It is a 5-bit field in the UL MAC Control information message for 'Filtered UPH Report' and is used to report the filtered UPH value, which has been calculated based on triggers defined in subclause 11.8.1.6a.1.
explanation: The text describes UPH as a specific ratio used in telecommunications, represented by a numerical field within a control message. This definition aligns with the characteristics of a parameter: a measurable value that configures or influences a system's behavior.
section_title: 9.2.5.3a	UL MAC Control information
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