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Long term evolution advanced (LTE-A) uplink power control method based on reference signal received power (RSRP)

A technology of power control and measurement value, applied in power management, wireless communication, electrical components and other directions, can solve the problems of multiple signaling, occupation, large transmission delay, etc., to improve transmission power, reduce throughput, and improve throughput Effect

Inactive Publication Date: 2017-11-17
TIANJIN UNIV
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Problems solved by technology

Since this strategy requires UE and ENodeB to cooperate with each other and takes up more signaling, it will generate a larger transmission delay

Method used

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  • Long term evolution advanced (LTE-A) uplink power control method based on reference signal received power (RSRP)

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, the present invention will be further described:

[0037] It can be seen from the protocol that the uplink physical channels mainly include uplink PUSCH (Physical Uplink Shared Channel), PUCCH (Physical Uplink Control Channel), PRACH (Random Access Channel), and SRS (Sounding Reference Signal). Therefore, in the embodiment of the present invention, only Consider uplink power control on these channels.

[0038] In a wireless communication system, PUSCH carries data signals, RRC (Radio Resource Control, radio resource control layer) control signals superimposed on it, and aperiodic CQI (Channel Quality Indicator, downlink channel quality indication) commands, mainly transmitting user Data occupies 96% of the physical resource blocks of the system. Therefore, the power control of the PUSCH will directly affect the system throughput. It can be seen that the uplink power control mainly refers to the power control on the PUSCH...

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Abstract

The invention discloses a long term evolution advanced (LTE-A) uplink power control method based on reference signal received power (RSRP). The method comprises the following steps of dividing UE in a cell into central area UE, middle area UE and edge area UE according to RSRP measured by UE in the cell; after the types of the UE are determined, performing closed loop power adjustment on users accordant with conditions based on a power adjustment factor corrected based on service cell RSRP and adjacent cell RSRP, and statistically analyzing the throughput capacity of edge users and the overall throughput capacity of the cell. Compared with the prior art, the method provided by the invention classifies the UE in the cell based on a RSRP measured value, and adopts different power control algorithms for different types of UE without increasing neighbor cell interference by using the power adjustment factor based on the RSRP measured value. According to the method provided by the invention, interference between the cells of the LTE-A system can be reduced to a certain extent; compared with an existing classical open loop power control algorithm and an existing classical closed loop power control algorithm, the method achieves good compromise between the average throughput capacity of the cell and the throughput capacity of the edge users of the cell.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an improved method for the uplink power control technology of the LTE-A system. Background technique [0002] LTE-A is an evolved version of LTE (Long Term Evolution) technology, and is a real 4G communication technology. The advantages of 4G technology, such as high throughput rate, low bit error rate, minimized interference, and maximized battery life, are directly manifested in the communication process. An important factor for the high rate of LTE-A is that the LTE-A system adopts Orthogonal Frequency Division Multiplexing (OFDM) technology, and each user in the cell occupies different mutually orthogonal subcarriers, so there is no cell in the system Intra-cell interference, only inter-cell interference. Although increasing the power can increase the throughput to a certain extent, the increase in power will inevitably bring greater inter-cell interference, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/08H04W52/14H04W52/24
CPCH04W52/08H04W52/146H04W52/241H04W52/243
Inventor 苏寒松代志涛刘高华
Owner TIANJIN UNIV
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