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Power control method and device
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A technology of power control and transmission power, applied in the field of power control methods and equipment
Active Publication Date: 2017-05-24
DATANG MOBILE COMM EQUIP CO LTD
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[0009] Embodiments of the present invention provide a power control method and device, which are used to solve the problem of how to perform power control when there is overlapping transmission between the SRS and the uplink channel
Method used
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Embodiment 1
[0080] Such as Figure 5a As shown, in subframe i, CC1 corresponds to the maximum transmit power of the carrier applied to the uplink channel on CC1 The maximum transmit power of the carrier applied to the uplink channel on CC2 corresponding to CC2 need to satisfy P CMAX_L,c ≤P H CMAX,c ≤P CMAX_H,c , the maximum transmit power of the terminal applied to the uplink channel Need to meet P CMAX_L_CA ≤P H CMAX ≤P CMAX_H_CA ; The maximum transmit power of the carrier applied to the SRS on CC1 corresponding to CC1 Need to meet P CMAX_L,c ≤P S CMAX,c ≤P CMAX_H,c , the maximum transmit power of the terminal applied to the SRS Need to meet P CMAX_L_CA ≤P S CMAX ≤P CMAX_H_CA ,in:
[0081] 1) Intra-band CA:
[0082] for P H CMAX,c ,
[0083] P CMAX_L,c =MIN{P EMAX,c -ΔT C,c ,P PowerClass -MAX(MPR c +A-MPR c ,P-MPR c )-ΔT C,c};
[0084] P CMAX_H,c =MIN{P EMAX,c ,P PowerClass};
[0085] for P H CMAX ,
[0086] P CMAX_L_CA =MIN{10log 10 Σp EMAX...
Embodiment 2
[0106] Such as Figure 5b As shown, in subframe i, the MPR, A-MPR and and as well as The determination method is the same as that in Embodiment 1; for SRS2 on CC2, in intra-band CA, its Corresponding to SRS The MPR of A-MPR is determined according to the total transmission bandwidth of PUCCH-1 / PUSCH-1 and SRS2 and the highest modulation order, and the A-MPR is determined according to the total transmission bandwidth of PUCCH-1 / PUSCH-1 and SRS2 and the starting position of RB on each carrier Determined, the remaining calculation steps and methods are the same as in Embodiment 1; when inter-band CA, its The corresponding MPR2 is determined according to the transmission bandwidth and modulation order of SRS2, A-MPR 2 According to the transmission bandwidth of SRS2 and the starting position of RB, the P S CMAX Based on the corresponding parameters of CC2, such as the MPR corresponding to SRS1 1 、A-MPR 1 And the corresponding parameters of CC1 with overlapping transm...
Embodiment 3
[0108] Such as Figure 5c As shown, in subframe i, the uplink channel on CC1 Corresponding to the uplink channel In Intra-band and inter-band CA, its MPR is only determined according to the transmission bandwidth and modulation order of PUCCH-1 / PUSCH-1, and A-MPR is determined according to the transmission bandwidth of PUCCH-1 / PUSCH-1 and the starting RB The position is determined without considering information such as SRS transmission bandwidth, RB allocation, modulation order, etc., and the rest of the calculation steps and methods are the same as in Embodiment 1; the SRS2 in subframe i and the corresponding SRS The determination method is the same as that in Embodiment 2.
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Abstract
The embodiment of the invention discloses a power control method and device and relates to the field of wireless communication. The method and the device are used for solving a problem of how to perform power control when overlapping transmission of a sounding reference signal (SRS) and an uplink channel exits. In the power control method and device, if an uplink channel exists in a current uplink subframe, then a terminal determines a terminal maximum transmission power applied to the uplink channel and / or a carrier maximum transmission power which is corresponding to a carrier in which uplink transmission exists and applied to an uplink channel of the carrier according to an assumed condition that an SRS which is transmitted in an overlapping manner with the uplink channel does not exist; and if SRS transmission exists in the current uplink subframe, the terminal determines the a terminal maximum transmission power which is applied to the SRS and / or a carrier maximum transmission power which is corresponding to each carrier in which SRS transmission exists and applied to an SRS on the carrier according to the real overlapping condition within an SRS transmission time so as to perform power control. Through adoption of the technical scheme, the above-mentioned problem can be solved.
Description
technical field [0001] The present invention relates to the field of wireless communication, in particular to a power control method and equipment. Background technique [0002] In Long Term Evolution-Advanced (LTE-A) version 10 (Release10, Rel-10), the uplink only supports Intra-band carrier aggregation (Carrier Aggregation, CA). The signal propagation characteristics are similar, and the uplink transmission time is adjusted based on the Timing Advance (TA) of the Primary Component Carrier (PCC), so the uplink transmission times of multiple carriers are aligned. Rel-10 supports simultaneous transmission of Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared CHannel (PUSCH), but does not support Sounding Reference Signal (SRS) and PUCCH / PUSCH / Physical Random Access Channel (Physical Random Access CHannel, PRACH) and other uplink channels are overlapped for transmission. If they overlap, SRS will be discarded; only when PUCCH adopts the shortened format and P...
Claims
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Application Information
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