WO2010127623A1 - 探测参考信号发送功率配置方法、网络侧设备及ue - Google Patents
探测参考信号发送功率配置方法、网络侧设备及ue Download PDFInfo
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- WO2010127623A1 WO2010127623A1 PCT/CN2010/072468 CN2010072468W WO2010127623A1 WO 2010127623 A1 WO2010127623 A1 WO 2010127623A1 CN 2010072468 W CN2010072468 W CN 2010072468W WO 2010127623 A1 WO2010127623 A1 WO 2010127623A1
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- srs
- transmission power
- cell
- srs transmission
- path loss
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/08—Closed loop power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
Definitions
- the present invention relates to the field of 3GPP long-term evolution system technologies, and in particular, to a sounding reference signal (SRS, Sounding Reference Signal) transmission power configuration method, a network side device, and a UE.
- SRS Sounding Reference Signal
- the UE sends an SRS on the time and frequency resources specified by the camping cell, and the Sounding Reference Signal detects the camped cell, and the evolved base station (eNodeB) in the cell receives the signal according to the SRS and the eNodeB sent by the UE.
- the channel information from the UE to the eNodeB is estimated as the basis for uplink frequency scheduling, MCS selection, and resource allocation.
- the power of the SRS sent by the UE is calculated according to the indication of the eNodeB and the path loss of the UE to the camping cell, and the specific formula (1) is adopted:
- P SRS (0 is the transmit power of the SRS, is the subframe number where the SRS is located, / ⁇ « is the maximum transmit power of 1 ⁇ , / ⁇ is the power parameter of 1 ⁇ , and M SRS is the bandwidth of the SRS transmission, P - PUSCH ( ) and / (0 are the same as the corresponding power parameters of the PUSCH channel, PL is the path loss of the UE to its camping cell, and W.PL is the path loss compensation amount.
- the eNodeB sends the power parameter of the SRS through the parameter configuration command ( Including RS - ⁇ , M SRS , P 0 _ PUSCH (J) ⁇ « and ) are indicated to the UE; the UE calculates the PL, and then uses the PL, P CMAX , and the received SRS transmission power parameters, and calculates according to the equation (1) SRS transmission power.
- multi-point coordinated transmission Transmission technology to improve the quality of service for users at the edge of the community.
- the multi-point coordinated transmission technology improves the quality of the received signals and reduces the interference between the cells through the joint scheduling or coordinated transmission of multiple cells separated geographically, thereby effectively improving the system capacity and the spectral efficiency of the edge users.
- channel information of a UE to multiple cells is an important factor affecting system performance.
- channel detection needs to be performed on multiple cells, that is, SRS is transmitted to multiple cells.
- the transmission power of the SRS is still determined by using the formula (1); however, since the distances of the multiple UEs to the UE are different, the path loss of the corresponding UE to each cell is also different, and the UE still resides according to the UE.
- the path loss of the cell calculates the transmit power of the SRS, which causes the SRS signal transmitted by the UE received by the far eNodeB to be weak, resulting in poor channel estimation accuracy.
- the embodiments of the present invention provide two SRS transmission power configuration methods, which can ensure that the cell with poor channel quality receives the power of the SRS, thereby ensuring the accuracy of the channel estimation.
- the embodiment of the present invention further provides a network side device and a UE, which can ensure that the cell with poor channel quality receives the power of the SRS, thereby ensuring channel estimation accuracy.
- a sounding reference signal (SRS) transmission power configuration method includes:
- the network side device determines the SRS transmission power parameter according to the power level of the signal sent by the to-be-detected cell before receiving the user equipment UE and/or the cell information that the UE needs to detect, and sends the SRS transmission power parameter to the UE.
- a method for configuring a SRS transmission power method includes:
- the UE calculates the path loss of each cell to be detected to the UE, and calculates the SRS transmission power by using the path loss and the SRS transmission power parameter.
- a network side device is configured to determine an SRS transmission power parameter according to a power level of a signal that is sent by the UE to be detected before receiving the UE and/or a cell information that the UE needs to detect, and send the SRS transmission power parameter to the UE.
- a UE is configured to receive an SRS transmission power parameter sent by a network side device, calculate a path loss of each to-be-detected cell to the UE, and calculate the SRS transmission power by using the path loss and the SRS transmission power parameter.
- the SRS transmission power configuration method, the network side device, and the UE proposed by the present invention can comprehensively consider the path loss of multiple cells that need to be detected when calculating the SRS transmission power, and ensure that the cell with poor channel quality receives the power of the SRS, thereby ensuring the channel. Estimated accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
- FIG. 1 is a schematic structural diagram of an application system according to an embodiment of the present invention. Mode for carrying out the invention
- the SRS transmission power configuration method and system of the present invention comprehensively considers the path loss of multiple cells to be detected when calculating the SRS transmission power, and ensures that the cell with poor channel quality receives the power of the SRS, thereby ensuring the accuracy of the channel estimation.
- the path loss of multiple cells to be detected there are several ways to consider the path loss of multiple cells to be detected, such as:
- the network side device sends the signal to the UE according to the path loss of the UE to multiple to-be-detected cells.
- SRS transmission power parameters (including RS - QFFSET , M SRS , ⁇ . - PUSCH ( ), and / «) are adjusted (of course, due to the characteristics of the parameters themselves, the network side device can only adjust some of the parameters), the UE adopts adjustment
- the SRS transmission power parameter calculates the SRS transmission power
- the network side device calculates the power adjustment amount according to the SRS or other signals sent by the UE to be detected before receiving the UE, and sends the SRS transmission power parameter and A to the UE; the UE calculates the SRS transmission power and then uses P d to adjust; Or, the UE calculates a path loss of each to-be-detected cell and considers the path loss when calculating the SRS transmission power;
- the UE calculates the SRS transmission power and adjusts according to the pre-agreed adjustment amount; or, combines the foregoing several situations.
- FIG. 1 is a schematic structural diagram of an application system according to an embodiment of the present invention.
- the UE resides in cell 1 and probes cells 1, 2 and 3.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- Step 101 The network side device determines an SRS transmission power parameter, and determines an SRS transmission power parameter according to the power level of the signal sent by the UE to be detected before the UE or the number of cells that the UE needs to detect, and sends the SRS transmission power parameter to the UE.
- the signal previously sent by the UE may be an SRS or other signal; the network side device may send the P SRS in the power parameter to the SRS .
- FFSET or / (0 to adjust;
- the SRS transmission power parameters include: P SRS QFFSET , M srs , ⁇ . - PUSCH ( ), ⁇ ) and / ( ); wherein the p Q - PUSCH ( ), and / (o are power levels and/or UEs of the signal transmitted by the network side device according to each of the to-be-detected cells before receiving the UE
- the SRS transmission power parameter adjusted by the cell information to be detected; wherein the cell information may be information such as the number of cells, the cell location, the cell radius, and the cell topology.
- the network side device may send the adjusted SRS transmission power parameter to the UE through a dedicated parameter configuration command, or may be sent through an existing parameter configuration command; and may further include indicating whether the UE performs the Multi-cell channel sounding or includes a set of cells that require channel sounding.
- the network side device may specifically be a resident cell of the UE.
- MME mobility management entity
- the set of cells to be detected is a set of cells 1 2 and 3.
- Step 103 The UE feeds back the SRS transmission power to the eNodeB of the cell 1, the cell 1
- the eNodeB sends the SRS transmission power to the eNodeBs of all the cells to be detected (ie, cells 2 and 3); or the eNodeB of the cell 1 calculates the SRS transmission power according to other information fed back by the UE, such as the Power Head Room, and sends the SRS transmission power.
- the eNodeB to the cells 2 and 3.
- the UE directly feeds the SRS transmission power to the eNodeB of all the cells to be detected.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- Step 201 Same as step 101.
- Step 202 When the UE sends the SRS to detect 3 cells once, the UE calculates the path loss PL1 of the cell 1, the path loss PL1 to the cell 2, and the path loss PL3 to the cell 3.
- the path loss PL2 of the UE to the cell 2 is taken as PL, or the average value of PL2 and PL1 is taken as PL;
- the UE calculates the SRS transmission power using the formula (1):
- Embodiment 3 Step 301: The network side receives the device to be detected in each cell to the power level of a signal transmitted from the user equipment UE before the UE or the number of cells to be detected SRS transmission power parameter is determined; the SRS transmission parameters and the transmission power P d to the UE.
- the SRS transmission power parameters include: P SRS — QFFSET , M SRS , ⁇ . – PUSCH ( ), ⁇ ( ⁇ , / (0 and where, the amount of power adjustment determined for the network side device;
- the signal previously sent by the UE may be an SRS or other signal.
- the network side device may send the SRS transmission power parameter to the UE through a dedicated parameter configuration command, or may transmit through an existing parameter configuration command; and may further include indicating whether the UE performs the multi-cell channel.
- Step 302 The UE calculates the path loss PL of the camped cell (ie, cell 1), and uses the received SRS transmission power parameter and the calculated PL to calculate the SRS transmission power by using the following formula:
- Embodiment 4 is a diagrammatic representation of Embodiment 4:
- Step 401 Same as step 301.
- Step 402 When the UE sends the SRS to detect 3 cells once, the UE calculates the path loss PL1 of the cell 1, the path loss PL1 to the cell 2, and the path loss PL3 to the cell 3.
- the path loss PL2 of the UE to the cell 2 is taken as PL, or the average value of PL2 and PL1 is taken as PL;
- the UE uses the received SRS transmission power parameter and the calculated PL, using the following formula Calculate the SRS transmit power:
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- Step 501 The UE receives an SRS transmission power parameter sent by the network side device.
- this step it may further include indicating whether the UE performs multi-cell channel sounding or includes a set of cells that need to perform channel sounding.
- Step 502 The UE determines the path loss PL, and the specific calculation manner is:
- the path loss PL2 of the UE to the cell 2 is taken as a PL, or the average value of the PL2 and the PL1 is used as a PL UE to use the received SRS transmission power parameter and determined.
- PL using formula (1) to calculate SRS transmit power:
- P SRS ( ) min ⁇ P CMAX , SRS _OFFSET + 10 log 10 ( SRS ) + P 0 PUSCH ( j) + a( j) ⁇ PL + f ( ⁇ ) ⁇ Step 503: Same as step 103.
- Step 601 The same as step 501.
- Step 602 The UE calculates the path loss to the camped cell (Cell 1), and uses the received SRS transmit power parameter and the calculated path loss of the UE to the camped cell, and calculates the SRS transmit power by using the following formula:
- the pre-agreed adjustment value may be determined according to the number of cells to be detected.
- Step 603 Same as step 103.
- Step 701 The same as step 601.
- Step 702 The UE determines the path loss PL, and the specific calculation manner is:
- the path loss PL2 of the UE to the cell 2 is taken as PL, or the average value of PL2 and PL1 is taken as PL.
- the UE uses the received SRS transmission power parameter and the determined PL to calculate the SRS transmission power using the following formula:
- Step 703 Same as step 103.
- Step 801 The same as step 301.
- the pre-agreed adjustment value may be determined according to the number of cells to be detected.
- Step 803 Same as step 103.
- Step 901 The same as step 801.
- Step 902 The UE determines the path loss PL, and the specific calculation manner is:
- the path loss PL2 of the UE to the cell 2 is taken as PL, or the average value of PL2 and PL1 is taken as PL.
- the UE uses the received SRS transmission power parameter and the determined PL to calculate the SRS transmission power using the following formula:
- P S RS (0 min ⁇ P CMAX , SRS _OFFSET + 101og 10 (M SRS ) + 0 _PUSCH U) + «(7) ⁇ PL + f (i) + P D + P F
- the adjustment value may be determined according to the number of cells to be detected.
- Step 903 Same as step 103.
- the present invention further provides a network side device, configured to determine an SRS transmission power parameter according to a power level of a signal sent by a UE to be detected before receiving a UE and/or a cell information that the UE needs to detect, and send the SRS transmission power parameter. To the UE.
- the embodiment of the present invention further provides a UE, which is configured to receive an SRS sent by a network side device.
- the power parameter is sent, and the path loss of each cell to be detected to the UE is calculated, and the SRS transmission power is calculated by using the path loss and the SRS transmission power parameter.
- the SRS transmission power configuration method and system proposed by the present invention comprehensively consider the path loss of multiple cells that need to be detected, and the path loss is limited as much as possible under the premise of ensuring the received signal quality of the cell with the largest path loss.
- the SRS transmission power according to the present invention it is possible to ensure that the cell with poor channel quality receives the power of the SRS, thereby ensuring the accuracy of the channel estimation.
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Priority Applications (3)
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KR1020117028848A KR101348595B1 (ko) | 2009-05-05 | 2010-05-05 | 사운딩 참조 신호의 전송 파워의 배치방법, 그의 네트워크측 장치 및 사용자 장비 |
US13/319,031 US9042932B2 (en) | 2009-05-05 | 2010-05-05 | Method for configuring transmit power of sounding reference signal, network device and UE |
EP10772026.0A EP2429244B1 (en) | 2009-05-05 | 2010-05-05 | Method for sounding reference signal transmission power configuration, user equipment and system |
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CN200910083197.9 | 2009-05-05 | ||
CN 200910083197 CN101883415B (zh) | 2009-05-05 | 2009-05-05 | 探测参考信号发送功率配置方法、网络侧设备及ue |
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US (1) | US9042932B2 (zh) |
EP (1) | EP2429244B1 (zh) |
KR (1) | KR101348595B1 (zh) |
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WO (1) | WO2010127623A1 (zh) |
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EP2747495A1 (en) * | 2011-08-16 | 2014-06-25 | Huawei Technologies Co., Ltd | Compensation method, base station, and user equipment for uplink power control in a comp system |
EP2747495A4 (en) * | 2011-08-16 | 2014-06-25 | Huawei Tech Co Ltd | COMPENSATION METHOD, BASE STATION AND USER EQUIPMENT FOR CONTROLLING UPLINK POWER IN A COMP SYSTEM |
US9924473B2 (en) | 2011-08-16 | 2018-03-20 | Huawei Technologies Co., Ltd. | Compensation method, base station, and user equipment for uplink power control in a CoMP system |
WO2013102485A1 (en) * | 2012-01-02 | 2013-07-11 | Huawei Technologies Co., Ltd. | Power control in a wireless communication system for uplink transmissions with coordinated reception |
US9661581B2 (en) | 2012-01-02 | 2017-05-23 | Huawei Technologies Co., Ltd. | Power control in a wireless communication system |
Also Published As
Publication number | Publication date |
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EP2429244A1 (en) | 2012-03-14 |
KR101348595B1 (ko) | 2014-01-15 |
US9042932B2 (en) | 2015-05-26 |
EP2429244B1 (en) | 2014-12-03 |
EP2429244A4 (en) | 2012-10-31 |
CN101883415B (zh) | 2013-06-05 |
US20120052904A1 (en) | 2012-03-01 |
CN101883415A (zh) | 2010-11-10 |
KR20120005539A (ko) | 2012-01-16 |
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