Method and device for controlling transmission power of user equipment
A technology for transmitting power control and user equipment, applied in the field of communication, can solve the problems of eliminating the influence of baseband signal processing power increment, existence of deviation, etc., to achieve the effect of ensuring performance and accuracy
Active Publication Date: 2013-03-06
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology
[0006] However, this document in the prior art only proposes the idea of transmitting power calibration from the control flow, and does not effectively eliminate the influence of the power increment introduced in the baseband signal processing process, nor does it effectively eliminate the influence of the data signal in a subframe and the demodulation reference signal are adjusted to the same power level, so processing according to the existing technical scheme will inevitably cause a deviation between the actual power transmitted by the UE and the power that the base station expects the UE to transmit
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[0036] Embodiments of the present invention provide a user equipment transmission power control method and device, which can precisely control the transmission power of UE.
[0037] see figure 1 , an embodiment of the user equipment transmission power control method of the present invention includes:
[0038] 101. The UE receives a downlink channel signal from the base station, and analyzes the received downlink channel signal;
[0039] In this embodiment, the UE may receive the downlink channel signal sent by the base station through the downlink channel, and after receiving the downlink channel signal, may analyze the downlink channel signal, and the specific process is not limited here.
[0040]102. The UE generates an uplink channel signal according to the parsed downlink channel signal, and calculates uplink transmit power;
[0041] After analyzing the downlink channel signal, the UE can generate an uplink channel signal according to the analyzed downlink channel signal...
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The invention discloses a method and a device for controlling transmission power of user equipment. The method includes: the UE (user equipment) receives a downlink channel signal from a base station and analyzes the received downlink channel signal; an uplink channel signal is generated according to the analyzed downlink channel signal, and uplink transmission power is computed; a power calibration value of an uplink channel data signal and a power calibration value of a DMRS (demodulation reference signal) are determined respectively according to the downlink channel signal, the uplink transmission power and power increments of the uplink channel data signal and the DMRS; and according to the power calibration value of the uplink channel data signal, the power calibration value of the DMRS, a preset hardware power control parameter and a preset baseband processing characteristic parameter, power calibration of the uplink channel data signal and power calibration of the DMRS are performed respectively in a baseband processing flow, and then power calibration of the uplink channel data signal and power calibration of the DMRS are performed uniformly in a hardware power control flow. The method and the device are capable of controlling the transmission power of the UE accurately.
Description
technical field [0001] The present invention relates to the communication field, in particular to a user equipment transmission power control method and device. Background technique [0002] In order to ensure the data rate of the user equipment (UE, User Equipment) and reduce the interference of the user to other users, the uplink transmission power of the UE of the user is strictly controlled in the Long Term Evolution (LTE, Long Term Evolution) system and its evolution system. limit. [0003] Since the bandwidth allocated to the UE for uplink transmission is variable within the unit scheduling time, in the baseband processing process, if the same processing flow is used for different bandwidth configurations, it will cause a large loss of accuracy in the signal baseband signal processing; In the baseband processing process, if different processing procedures are adopted for different bandwidth configurations, the transmit power of UE uplink subframes will be greatly diff...
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Inventor 梁小涛冯侨谭舒
Owner SPREADTRUM COMM (SHANGHAI) CO LTD