Configuration method of sending power of sounding reference signals (SRS), network side equipment and user equipment (UE)

A technology for detecting reference signals and network-side equipment, which is applied in power management, wireless communication, electrical components, etc., can solve problems such as poor channel accuracy and weak SRS signals, and achieve the effect of ensuring accuracy

Active Publication Date: 2010-11-10
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the UE sends SRS, it still adopts formula (1) to determine the transmission power of the SRS; however, due to the different distances from multiple cells to the UE, the corresponding path loss from the UE to each cell is also different. Calculating the SRS transmission power based on the path loss of the cell will cause the SRS signal sent by the UE received by the far eNodeB to be weak, resulting in poor channel estimation accuracy

Method used

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  • Configuration method of sending power of sounding reference signals (SRS), network side equipment and user equipment (UE)
  • Configuration method of sending power of sounding reference signals (SRS), network side equipment and user equipment (UE)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 101: The network side device determines the SRS transmission power parameter, determines the SRS transmission power parameter according to the power level of the signal sent by the UE before each cell to be detected or the number of cells that the UE needs to detect, and sends the SRS transmission power parameter to the UE.

[0029] In this step, the signal sent by the UE before can be SRS or other signals; the network side device can send the P in the power parameter of the SRS. SRS_OFFSET , α(j) or f(i) to adjust; SRS transmission power parameters include: P SRS_OFFSET , M SRS ,P O_PUSCH (j), α(j) and f(i);

[0030] In addition, in this step, the network side device may send the adjusted SRS transmission power parameter to the UE through a dedicated parameter configuration command, or send it through an existing parameter configuration command; and may further include indicating whether the UE performs multi-cell The channel detection may include a set of cell...

Embodiment 2

[0036] Step 201: Same as step 101.

[0037] Step 202: When the UE sends an SRS to detect three cells, the UE calculates the path loss PL1 to cell 1, the path loss PL2 to cell 2, and the path loss PL3 to cell 3, and calculates PL using a specific function, such as: Wherein the maximum value, namely PL=max(PL1, PL2, PL3); or, take the average value of the three, namely PL=(PL1+PL2+PL3) / 3; or other functions can be used to calculate PL;

[0038] When the UE sends an SRS to detect a cell, such as the cell 2 to be detected, the path loss PL2 from the UE to the cell 2 is used as the PL, or the average value of PL2 and PL1 is used as the PL;

[0039] The UE uses the formula (1) to calculate the SRS transmission power:

[0040] P SRS (i)=min{PCMAX , P SRS_OFFSET +10log 10 (M SRS )+P O_PUSCH (j)+α(j)·PL+f(i)}

[0041] Step 203: Same as step 103.

Embodiment 3

[0043] Step 301: The network side device determines the SRS transmission power parameter according to the power level of the signal sent by the user equipment UE before each cell to be detected or the number of cells that the UE needs to detect; the SRS transmission power parameter and P d sent to UE.

[0044] Among them, the SRS transmission power parameters include: P SRS_OFFSET , M SRS ,P O_PUSCH (j), α(j), f(i) and P d ; among them, P d The power adjustment amount determined for the network side device;

[0045] In this step, the signal sent by the UE before may be SRS or other signals.

[0046] In addition, in this step, the network side device may send the SRS transmission power parameter to the UE through a dedicated parameter configuration command, or through an existing parameter configuration command; and may further include indicating whether the UE performs multi-cell channel detection or Including the set of cells that need to perform channel detection.

[...

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Abstract

The invention provides a configuration method of sending power of two types of sounding reference signals (SRS), network side equipment and user equipment (UE), wherein the method comprises the following steps: the network side equipment determines SRS sending power parameters according to the power level of signals which are previously sent by the UE and received by each cell to be detected or the number of cells needing to be detected by the UE, and then, the SRS sending power parameters are sent to the UE. The invention can comprehensively consider the path loss of a plurality of cells to be detected in the process of computing SRS sending power to ensure that the cell with poor channel quality receives the power of the SRS, thereby ensuring the accuracy of channel estimation.

Description

technical field [0001] The present invention relates to the technical field of 3GPP long term evolution system, in particular to a sounding reference signal (SRS, Sounding Reference Signal) transmission power configuration method, network side equipment and UE. Background technique [0002] In the LTE system, the UE sends SRS on the time and frequency resources specified by the cell where it resides, and the Sounding Reference Signal detects the cell where it resides, and the evolved base station (eNodeB) in the cell uses the SRS sent by the UE and the signal received by the eNodeB Estimate the channel information from UE to eNodeB as the basis for uplink frequency scheduling, MCS selection and resource allocation. [0003] The power of UE sending SRS is calculated according to the instructions of eNodeB and the path loss from UE to the cell where it resides. Specifically, formula (1) is used: [0004] P SRS (i)=min{P CMAX , P SRS_OFFSET +10log 10 (M SRS )+P O_PUSCH (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W72/12H04W88/02H04W88/08
CPCH04W52/146H04W52/08H04W52/242H04W52/325H04W52/40
Inventor 高秋彬沈祖康缪德山潘学明孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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