WO2010105398A1 - 一种功率控制方法、装置及网络设备 - Google Patents

一种功率控制方法、装置及网络设备 Download PDF

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Publication number
WO2010105398A1
WO2010105398A1 PCT/CN2009/070803 CN2009070803W WO2010105398A1 WO 2010105398 A1 WO2010105398 A1 WO 2010105398A1 CN 2009070803 W CN2009070803 W CN 2009070803W WO 2010105398 A1 WO2010105398 A1 WO 2010105398A1
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WO
WIPO (PCT)
Prior art keywords
uplink
serving
power control
parameter
base station
Prior art date
Application number
PCT/CN2009/070803
Other languages
English (en)
French (fr)
Inventor
周明宇
万蕾
赵亚军
任晓涛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2009/070803 priority Critical patent/WO2010105398A1/zh
Priority to CN200980114693.4A priority patent/CN102498740B/zh
Priority to EP09841683.7A priority patent/EP2400801B1/en
Priority to ES09841683.7T priority patent/ES2552801T3/es
Publication of WO2010105398A1 publication Critical patent/WO2010105398A1/zh
Priority to US13/235,117 priority patent/US8768401B2/en
Priority to US14/285,711 priority patent/US9008718B2/en
Priority to HRP20151209TT priority patent/HRP20151209T1/hr

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/08Closed loop power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/146Uplink power control

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a power control method, apparatus, and network device. Background technique
  • the relationship between the AP and the cell may be that one cell includes one AP, or one cell includes multiple APs.
  • the uplink transmit power of the UE may be based on the downlink signaling of the base station eNodeB and/or the measurement result of the radio channel by the UE.
  • the physical uplink shared channel (PUSCH) of the UE is more than the transmit power of the physical uplink shared channel (PUSCH).
  • the UE receives the downlink signaling sent from the serving AP to obtain P 0 — N0RMINAL _ PUSCH G) and P 0 — us — PUSCHG, and obtains the PL by measuring the downlink signal sent from the serving AP, and can calculate by combining other parameters.
  • the uplink transmit power value is obtained.
  • CoMP Coordinated Multi-Point Transmission
  • uplink and downlink different months and relay transmission
  • CoMP technology is an important means to improve the overall performance of the cell and the performance of the cell edge user.
  • Multiple APs can jointly transmit and receive data from the UE (the cooperative APs can be connected to the same
  • a base station can also be connected to different base stations, which introduces a new scenario, that is, the uplink and downlink service APs may be the same or different. If the above existing uplink power control algorithm is directly used, there is a problem in uplink power control.
  • the cell-specific parameters for example, Po_NORMINAL-PUSCHG
  • UE-specific parameters for example, P 0 — us — PUSCHG
  • the path loss is obtained by the UE by measuring the downlink signal of an AP. If the AP is different from the uplink serving AP of the UE, the uplink signal obtained according to the path loss parameter may be caused. The power and the expected power of the uplink serving AP do not match.
  • the embodiment of the present invention provides a power control method, device, and network device, which can ensure that the uplink transmission is normally performed through corresponding processing when the AP that sends the downlink signaling to the UE and the uplink serving AP of the UE are different.
  • An embodiment of the present invention provides a power control method, including:
  • the base station sends downlink signaling to the UE, so that the UE adjusts the uplink sending power according to the downlink signaling.
  • the embodiment of the invention further provides a power control device, including:
  • a determining unit configured to determine whether the downlink serving access point AP of the user equipment UE is the same as the uplink serving AP of the UE, and when the uplink serving AP is different, sending downlink signaling to the UE, so that the UE is configured according to the downlink Signaling adjusts the uplink transmit power.
  • a first receiving unit configured to receive a path loss measurement command and a parameter sent by the base station
  • a measuring unit configured to measure, according to the path loss measurement instruction received by the first receiving unit, the uplink serving AP of the UE and the at least one UE Path loss
  • a second calculating unit configured to calculate an uplink transmit power adjustment amount according to the measured path loss and the parameter obtained from the base station
  • the first adjusting unit is configured to adjust the uplink sending power according to the uplink sending power adjustment calculated by the second calculating unit.
  • a second receiving unit configured to receive, by the base station, change information of the serving AP of the UE, and the downlink signaling that carries information indicating an uplink transmission power adjustment amount;
  • a second adjusting unit configured to perform uplink transmit power adjustment according to the uplink transmit power adjustment amount and a range of current uplink power control parameters.
  • the power control method, the device, and the network device provided by the embodiments of the present invention can ensure that the calculated uplink transmit power and uplink transmission are expected by corresponding processing when the uplink signaling AP that sends downlink signaling to the UE and the uplink serving AP of the UE are different.
  • the uplink transmit power is matched to ensure normal uplink transmission.
  • FIG. 1 is a schematic diagram of a scenario 1 of the first embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the second scenario of the first scenario in the first embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a scenario 2 of scenario 2 in the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a second scenario of scenario 2 in the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the third situation of the second scenario in the first embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a power control device according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic structural diagram of a UE according to Embodiment 6 of the present invention.
  • FIG. 8 is a schematic structural diagram of a UE according to Embodiment 7 of the present invention.
  • the embodiment of the present invention provides a power control method, a device, and a network device, which can ensure normal uplink transmission by corresponding processing when an AP that transmits downlink signaling to the UE and an uplink serving AP of the UE are different.
  • the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the description of the LTE system in the embodiment of the present invention is not limited to the present invention, and those skilled in the art should understand that the present invention can also be applied to other systems or networks.
  • the meaning of the service AP in the embodiment of the present invention includes an uplink serving AP and a downlink serving AP.
  • the eNodeB obtains parameters of some or all of the uplink serving APs, and the parameter includes at least one of the following parameters:
  • Cell-specific parameters of the uplink serving AP for example: characterization of a desired received power value (P 0 NORMINAL PUSCHU ) in the LTE system, a parameter (aG) characterizing control of interference to other cells), and characterization of whether power is adjusted according to the MCS Parameter (Ks), etc.;
  • the UE-specific parameters determined by the uplink serving AP, the uplink serving AP determines the parameter according to its own scheduling, resources, and the like; the UE-specific means that the parameters may be different for each UE. It is mainly determined by the eNodeB or AP according to the AP's own scheduling, resources, and the like. For example: Control parameters in the LTE system that characterize the expected UE interference to other cells
  • the foregoing process may be performed when the uplink and/or downlink service AP of the UE changes.
  • the manner in which the eNodeB obtains the parameter of the uplink serving AP may be a connection manner between the eNodeB and the AP, including a fiber connection, etc.; when the uplink serving AP of the UE is connected to different eNodeBs , can also be passed through the connection between the eNodeB, including the X2 interface.
  • the relationship between the uplink transmit power adjustment amount and the downlink signaling may be that the downlink signaling directly includes the power adjustment amount information, or the power adjustment amount information may be implicitly transmitted in other downlink signaling.
  • the UE that is, high layer signaling (for example, higher layer signaling in the LTE system) can be used, and power control signaling in the prior art can also be used.
  • the signaling may be delivered to the UE through a broadcast channel and a downlink control channel.
  • the manner in which the eNodeB transmits the downlink signaling to the UE may be directly delivered to the UE, or may be first transmitted to the AP, and then transmitted to the UE through the AP.
  • an eNodeB is connected to two APs, and the UE is served by at most two APs.
  • the eNodeB is connected to the API and the AP2, and the uplink and downlink service APs of the UE are the same.
  • FIG. 1 shows the case where only the API serves the UE, and the prior art can achieve better performance;
  • the API and the AP2 jointly serve the UE, if the existing technology is used, that is, the UE receives the downlink signaling only from the API, as shown in the labeled "downlink signaling" in FIG.
  • the power control information of the API is different from the power control information of the AP2, and the path loss of the UE to the API and the AP2 is also different, and the uplink transmission power of the uplink signal sent by the UE to the AP2 is too large or too small. . Therefore, the prior art does not work properly in such a scenario.
  • the technical solution of the present invention can be implemented well, and the following steps can be specifically performed:
  • the API and AP2 respectively detect the uplink path loss between the UE and the UE;
  • the API and AP2 respectively pass the path loss and the parameters related to the uplink power control to the eNodeB, wherein the parameters related to the power control may include at least one of the following:
  • API and AP2 are expected to receive a received power value of a signal of the UE, the value including at least one of a cell-specific parameter and a UE-specific parameter, but is not limited to the parameter, or a value calculated by the two, The invention is not limited to how to calculate, that is, it can be a function of these parameters;
  • API and AP2 expect the compensation coefficient of the path loss to be compensated when the UE performs power control.
  • the value may be a real number in 0 ⁇ 1, and 1 means complete compensation of the path loss value;
  • API and AP2 expect the UE to combine the modulation and coding scheme (MCS, when performing power control)
  • the Ks values are different.
  • the uplink transmission power can be adjusted by combining different Ks values of the cell 1 and the cell 2 (for example, taking a function of different Ks values).
  • the eNodeB can combine the parameters of the API and the AP2 to determine the parameters of the power control of the UE, for example:
  • the API and AP2 expect the compensation of the path loss to be averaged when the UE performs power control, and the average value obtained is used as the parameter of the power control;
  • the eNodeB sends the parameters to the UE by using downlink signaling.
  • the UE After receiving the downlink signaling, the UE interprets the signaling, and adjusts the uplink sending power according to the interpreted result.
  • the eNodeB is connected to the API and the AP2.
  • the uplink and downlink service APs may be different because of the different transmission powers and antenna configurations of the APs and the different channel fading between the UE and the AP.
  • the transmit power of the AP is higher than that of the UE. Therefore, it is possible that the signal sent by the AP can be recovered normally by the UE, but the signal sent by the UE cannot be recovered normally by the AP.
  • the downlink service AP of the UE may be more than the uplink service of the UE. AP. Further, such a situation may cause the AP transmitting the downlink signaling to the UE to be different from the uplink serving AP of the UE.
  • the downlink service AP of the UE is an API.
  • the UE receives downlink signaling from the API (including the power control information of the API). 0 - NO RMINAL - PUSCHG) and ⁇ ⁇ - UE - PUSCHGM message) and only detect the path loss of the API to the UE, and the uplink serving AP is AP2, because the power control information of the API is different from the power control information of the AP2, and the API There is also a difference in the path loss of the AP2, which causes the uplink transmit power of the UE to reach AP2 to be too large or too small.
  • the technical solution of the present invention can be implemented well, and the following steps can be specifically performed:
  • the uplink path loss between the AP2 and the UE is detected; 2.
  • the AP2 passes the path loss and the parameters related to the uplink power control to the eNodeB, where the parameters related to the power control may include at least one of the following:
  • AP2 is expected to receive a received power value of a signal of the UE, the value including at least one of a cell-specific parameter and a UE-specific parameter, but is not limited to the parameter, or a value calculated by the two, The calculation, the invention is not limited, that is, it can be a function of these parameters;
  • AP2 expects the compensation coefficient of the path loss to be compensated when the UE performs power control.
  • the value may be a real number in 0 ⁇ 1, and 1 means complete compensation of the path loss value;
  • the eNodeB may determine, according to the foregoing parameters included in the information, parameters of the uplink power control of the UE;
  • the eNodeB sends the parameters to the UE by using downlink signaling.
  • the UE After receiving the downlink signaling, the UE interprets the signaling, and adjusts the uplink sending power according to the interpretation result.
  • the downlink service AP of the UE is API and AP2, if the existing technology is used,
  • the UE receives the downlink signaling from the API and detects only the path loss of the API to the UE, and the uplink serving AP is the AP2. At this time, the uplink transmission power of the UE to the AP2 is too large or too small for the same reason.
  • the technical solution of the present invention can be implemented well, and can be performed according to the following steps: 1. The uplink path loss between the AP2 and the UE is detected;
  • the AP2 passes the path loss and parameters related to the uplink power control to the eNodeB, where the parameters related to the power control may include at least one of the following:
  • AP2 is expected to receive a received power value of a signal of the UE, the value including at least one of a cell-specific parameter and a UE-specific parameter, but is not limited to the parameter, or a value calculated by the two, The calculation, the invention is not limited, that is, it can be a function of these parameters; 2)
  • the value may be a real number in 0 ⁇ 1, and when it is 1, it indicates the full compensation path loss value;
  • the eNodeB may determine the parameters of the uplink power control of the UE according to the foregoing parameters of the AP2.
  • the eNodeB sends the parameters to the UE by using downlink signaling.
  • the UE After receiving the downlink signaling, the UE interprets the signaling, and adjusts the uplink sending power according to the interpreted result.
  • the downlink service AP of the UE is only an API, and the downlink signaling is sent to the UE through the API, and the uplink serving AP is the API and the AP2, and the uplink power control may be performed as follows:
  • API and AP2 detect uplink path loss between the UE and the UE;
  • the API and AP2 pass the path loss and parameters related to the uplink power control to the eNodeB, wherein the parameters related to the power control may include at least one of the following:
  • API and AP2 are expected to receive a received power value of a signal of the UE, the value including at least one of a cell-specific parameter and a UE-specific parameter, but is not limited to the parameter, or a value calculated by the two, The invention is not limited to how to calculate, that is, it can be a function of these parameters;
  • AP1 and AP2 expect the compensation coefficient of the path loss to be compensated when the UE performs power control.
  • the value may be a real number in 0 ⁇ 1, and 1 means the full compensation path loss value;
  • the eNodeB can combine the parameters of the API and the AP2 to determine the parameters of the uplink power control of the UE, for example:
  • the API and AP2 expect the compensation of the path loss when the UE performs power control, and the average value obtained is used as the parameter of the power control;
  • the eNodeB sends the parameters to the UE by using downlink signaling.
  • the UE After receiving the downlink signaling, the UE maps the signaling, and adjusts the uplink sending power according to the mapping result.
  • the first embodiment of the present invention can ensure that the uplink transmission power calculated by the uplink transmission power and the uplink transmission power of the uplink transmission are matched by the corresponding processing when the uplink signaling AP of the UE that transmits the downlink signaling to the UE is different, thereby ensuring the uplink transmission.
  • the normal progress when the uplink signaling AP of the UE that transmits the downlink signaling to the UE is different.
  • Embodiment 2 of the present invention is a diagrammatic representation of Embodiment 2 of the present invention.
  • the embodiment of the present invention performs special processing on the path loss adjustment based on the first embodiment. That is, when the AP that sends the downlink signaling to the UE is different from the uplink serving AP of the UE, the eNodeB can also notify the UE to detect the path loss of some or all of the uplink serving APs by using downlink signaling (path loss measurement command). After receiving the signaling, the UE detects the path loss of the uplink serving AP and applies it to the uplink power control.
  • the eNodeB notifies the UE to detect the path loss of an AP, then the UE detects the path loss, and then calculates the transmission power according to the compensation coefficient notified by the eNodeB; if the UE is notified to detect the path loss of multiple APs, the UE may detect multiple paths. The loss is then calculated according to the compensation coefficient notified by the eNodeB.
  • the calculation mode is not limited in the embodiment of the present invention.
  • the downlink signaling may include an identifier (ID) of the uplink serving AP or information indicating the information.
  • ID the identifier of the uplink serving AP or information indicating the information.
  • the UE may know the downlink signal sent by the serving AP according to the identifier of the uplink serving AP or the information indicating the information, so as to interpret the downlink signaling, or detect the downlink signal, thereby obtaining an uplink path loss.
  • the second embodiment of the present invention can ensure that the uplink transmission power calculated by the uplink transmission power and the uplink transmission power of the uplink transmission are matched by the corresponding processing when the uplink signaling AP of the UE that transmits the downlink signaling to the UE is different, thereby ensuring the uplink transmission.
  • the normal progress can ensure that the uplink transmission power calculated by the uplink transmission power and the uplink transmission power of the uplink transmission are matched by the corresponding processing when the uplink signaling AP of the UE that transmits the downlink signaling to the UE is different, thereby ensuring the uplink transmission. The normal progress.
  • Embodiment 3 of the present invention is a diagrammatic representation of Embodiment 3 of the present invention.
  • the embodiment of the present invention binds the change of the serving AP of the UE to the range of the uplink power control parameter. That is, when the uplink and/or downlink serving AP of the UE changes, the eNodeB can notify the UE of the change of the serving AP through the downlink signaling; the eNodeB can also send the downlink power control signaling to the UE.
  • the UE After receiving the information about the change of the serving AP, the UE maps it to the modification of the uplink power control parameter range carried in the downlink signaling; after the UE receives the downlink power control signaling, according to the new power control parameter The range is interpreted by the downlink power control signaling to perform the adjustment of the uplink power.
  • the range of the uplink power control parameter is [- ⁇ , ⁇ ], where -A represents the minimum value of the power adjustment, B represents the maximum value of the power adjustment, and the unit may be dB;
  • the actual value for example, in the LTE system, the range of DCI format 3 is [-1, 0, l, 3] dB, indicating that one of the four power adjustments can be selected; when the uplink serving AP increases, the eNodeB passes the downlink signal.
  • the UE maps the uplink power control parameter to [_C, D] according to the increase of the uplink serving AP; when the uplink serving AP decreases, the eNodeB notifies the UE by using downlink signaling.
  • the range of the uplink power control parameter is mapped to [-E, F] according to the situation in which the uplink serving AP is reduced.
  • the UE may map the downlink power control signaling according to the range of the new uplink power control parameter, thereby adjusting the uplink power.
  • the third embodiment of the present invention can ensure that the uplink transmission power calculated by the uplink transmission power and the uplink transmission power of the uplink transmission are matched by the corresponding processing when the uplink signaling AP of the UE that transmits the downlink signaling to the UE is different, thereby ensuring the uplink transmission.
  • the normal progress can ensure that the uplink transmission power calculated by the uplink transmission power and the uplink transmission power of the uplink transmission are matched by the corresponding processing when the uplink signaling AP of the UE that transmits the downlink signaling to the UE is different, thereby ensuring the uplink transmission. The normal progress.
  • Embodiment 4 of the present invention When the uplink and/or downlink serving AP of the UE changes, the eNodeB may preferentially notify the UE of the change of the uplink serving AP. After receiving the information, the UE may automatically adjust the uplink sending power. For example, when the uplink serving AP is increased, the eNodeB notifies the UE by using the downlink signaling, and the UE automatically reduces the uplink sending power value after the uplink serving AP is increased. When the uplink serving AP decreases, the eNodeB notifies the UE by using downlink signaling, and the UE learns the uplink. After the service AP is reduced, the uplink transmit power value is automatically increased.
  • the notification that the eNodeB changes the serving AP of the UE may be that the downlink signaling directly includes the information, or may be implicitly transmitted to the UE in other downlink signaling.
  • the uplink transmit power value automatically adjusted by the UE may be previously notified to the UE by downlink signaling.
  • the uplink transmit power adjustment amount may be delivered by the eNodeB to the UE through multiple power control signaling, and after receiving the multiple control signaling, the UE performs all power control signaling instructions.
  • the range of power adjustment can be extended so that the power control method of the prior art can be utilized to support the embodiment of the present invention.
  • an uplink power control command may use a Downlink Control Indictater (DCI) format 0 (value range [-4, -l, l, 4] dB) and DCI format 3 ( The value range is [-l, 0, l, 3] dB) to pass), so if the uplink power control adjustment amount is 7 dB, the DCI format 0 including the indicated power adjustment to 4 dB and the transmission indication power can be simultaneously adjusted to 3dB DCI format 3 uplink power control command. After receiving these two commands, the UE will adjust the uplink transmit power by 7dB.
  • DCI Downlink Control Indictater
  • the uplink transmission power calculated by the corresponding processing is matched with the expected uplink transmission power of the uplink transmission, thereby ensuring uplink.
  • the transmission proceeds normally.
  • the fourth embodiment of the present invention can expand the range of power control and ensure the uplink transmission performance when the uplink serving AP changes.
  • a schematic structural diagram of a power control apparatus includes: a determining unit 610 and a sending unit 620, where:
  • the determining unit 610 is configured to determine whether the downlink serving AP of the UE and the uplink serving AP of the UE are the same;
  • the sending unit 620 is configured to: when the determining unit 610 determines that the downlink serving AP of the UE is different from the uplink serving AP of the UE, send downlink signaling to the UE, so that the UE is configured according to the Downlink signaling adjusts the uplink transmit power.
  • the apparatus may further include an obtaining unit 630, configured to obtain parameters from at least one uplink serving AP of the UE.
  • the parameters obtained from the uplink serving AP include at least one of the following parameters:
  • the path loss between the AP and the UE measured by the uplink serving AP;
  • the UE-specific parameters determined by the uplink service AP are the UE-specific parameters determined by the uplink service AP.
  • the device may further include a first calculating unit 640, configured to calculate an uplink transmit power adjustment amount according to the parameter obtained by the obtaining unit 630.
  • the sending unit 620 is further configured to indicate the uplink.
  • the information about the transmit power adjustment amount is sent to the UE in the downlink signaling.
  • the first calculating unit 640 calculates the uplink transmit power adjustment amount according to the obtained parameters, which is specifically:
  • One of the parameters obtained from the at least one uplink serving AP is taken. At least one of the UE-specific parameters determined by the uplink serving AP, and a path loss measurement command carried in the downlink signaling are sent to the UE.
  • the downlink signaling further includes an identifier of the uplink serving AP or information that identifies the identifier of the uplink serving AP.
  • the sending unit 620 is further configured to send the change information of the serving AP of the UE to the UE, so that the UE modifies the range of the uplink power control parameter according to the change information of the serving AP.
  • the acquiring unit 630 is further configured to acquire the change information of the serving AP of the UE, and send the information to the sending unit 620.
  • the sending unit 620 is further configured to send, in the foregoing, the serving AP that includes the UE to the UE.
  • the serving AP changes, the downlink signaling that carries the change information of the serving AP is sent to the UE, so that the UE automatically adjusts the uplink sending power according to the change information.
  • the sending unit 620 can send the downlink signaling to the UE not only through a broadcast channel or a downlink control channel.
  • the sending unit 620 may further send the downlink signaling to the UE by using a downlink serving AP of the UE.
  • a schematic structural diagram of a UE according to Embodiment 6 of the present invention includes: a first receiving unit 710, a measuring unit 720, a second calculating unit 730, and a first adjusting unit 740; wherein: a receiving unit 710, configured to receive a path loss measurement instruction and a parameter sent by the base station;
  • the measuring unit 720 is configured to measure a path loss of the uplink serving AP of the UE and the at least one UE according to the path loss measurement instruction received by the first receiving unit 710;
  • the second calculating unit 730 is configured to calculate an uplink transmit power adjustment amount according to the measured path loss and the parameter obtained from the base station;
  • the first adjusting unit 740 is configured to adjust the uplink sending power according to the uplink transmit power adjustment amount calculated by the second calculating unit 730.
  • a schematic structural diagram of a UE according to Embodiment 7 of the present invention includes: a preset unit 810, a second receiving unit 820, a modifying unit 830, and a second adjusting unit 840; wherein: the preset The unit 810 is configured to bind, in advance, change information of the serving AP of the UE to a range of uplink power control parameters of the UE.
  • the second receiving unit 820 is configured to receive, by the base station, the change information of the serving AP of the UE, and the downlink signaling that carries the information indicating the uplink transmit power adjustment amount;
  • the modifying unit 830 is configured to modify a range of the uplink power control parameter according to the change information
  • the second adjusting unit 840 is configured to perform uplink transmit power adjustment according to the uplink transmit power adjustment amount and a range of current uplink power control parameters.
  • the present invention is equally applicable to a relay transmission system (i.e., an AP in the text can be replaced by a relay node) or other system in which an uplink power control parameter and an uplink transmission mismatch exist.

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Description

一种功率控制方法、 装置及网络设备 技术领域
本发明涉及通信技术领域,尤其涉及一种功率控制方法、装置及网络设备。 背景技术
在现有的长期演进项目 ( Long Time Evolution, LTE ) 系统中, 用户设备 ( User Equipment, UE )通常在上行 (即 UE发送信号至接入点( Access Point, AP ) )和下行(即 AP发送信号至 UE )仅与一个 AP通信, 这里称之为服务 AP, 并且上行和下行的服务 AP是同一个 AP。 其中, AP是一个至少包括射频收发信 机的节点, AP上可以配置单个天线元或多个天线元; 多个 AP可以在地理位置 上集中或分散分布, 并通过有线或无线方式连接到 eNodeB; 或者 AP和 eNodeB 可以是相同的物理实体。 AP和小区( cell )的关系可以是一个小区包含一个 AP, 或一个小区包含多个 AP。 为叙述方便, 下文中以一个小区包含一个 AP为例来 说明。 在这样的系统中, UE的上行发送功率可以基于基站 eNodeB的下行信令 和 /或 UE对无线信道的测量结果, 例如, UE的物理上行共享信道(Physical Uplink Share Channel, PUSCH )发送功率是多个因素共同决定的, 部分因素包 括: UE测量得到的下行路径损耗(简称 "路损") PL; AP发送给 UE的小区特 有的功率调整量 Po— NORMINA— PUSCHG); AP发送给 UE的 UE特有的功率调整量 PO_UE_PUSCHG)。因此, UE接收从服务 AP发送的下行信令获得 P0_N0RMINAL_PUSCHG) 和 P0— us— PUSCHG) , 并通过测量从服务 AP发送的下行信号获得 PL, 及结合其它参 数就可以计算得到上行发送功率值。
在实现本发明的过程中, 发明人经过研究发现: 在通信系统中, 由于协作 多点传输 ( Coordinated Multi-Point transmission, CoMP )、上下行不同月良务小区、 中继传输等多种技术的引入, 带来了新的场景, 例如, CoMP技术是提高小区 整体性能及小区边缘用户性能的一个重要手段, 其中多个 AP可以协作发射和 接收来自 UE的数据(这些协作的 AP可以连接至同一个基站, 也可以连接至不 同的基站), 从而会引入新的场景, 即上行和下行的服务 AP可能相同, 也可能 不相同。如果直接釆用上述现有的上行功率控制算法, 则上行功率控制会存在 一定的问题。 具体而言, 在上行功率控制计算公式的参数中, 小区特有的参数 (例如 Po— NORMINAL— PUSCHG)值)和 UE特有的参数(例如 P0— us— PUSCHG)值)是 UE 从发送下行信令的 AP获得, 如果该 AP与 UE的上行服务 AP不同, 会造成根据 这些参数得到的上行信号的功率和上行服务 AP的期望功率不匹配。 另外, 在 上行功率控制计算公式的参数中, 路径损耗是 UE通过测量某个 AP的下行信号 获得的, 如果该 AP与 UE的上行服务 AP不同, 会造成根据该路径损耗参数得到 的上行信号的功率和上行服务 AP的期望功率不匹配。
发明内容
本发明实施例提供一种功率控制方法、装置及网络设备, 能够在发送下行 信令给 UE的 AP和 UE的上行服务 AP不同时 , 通过相应处理保证上行传输的正 常进行。
本发明实施例提供以下技术方案:
本发明实施例提供一种功率控制方法, 包括:
若 UE的下行服务 AP和该 UE的上行服务 AP不同, 基站发送下行信令 给所述 UE, 以使得所述 UE根据所述下行信令对上行发送功率进行调整。
本发明实施例还提供一种功率控制装置, 包括:
判断单元, 用于判断用户设备 UE的下行服务接入点 AP和该 UE的上行 服务 AP是否相同; 上行服务 AP不同时, 发送下行信令给所述 UE, 以使得所述 UE根据所述下 行信令对上行发送功率进行调整。
本发明实施例还提供一种 UE, 包括:
第一接收单元, 用于接收基站发送的路径损耗测量指令及参数; 测量单元,用于根据所述第一接收单元接收的路径损耗测量指令测量所述 UE与至少一个所述 UE的上行服务 AP的路径损耗;
第二计算单元,用于根据所述测量得到的路径损耗以及所述从基站获得的 参数计算出上行发送功率调整量;
第一调整单元,用于根据所述第二计算单元计算得到的上行发送功率调整 量对上行发送功率进行调整。
本发明实施例还提供一种 UE, 包括: 预设单元, 用于预先将所述 UE的服务 AP的变化信息与所述 UE的上行 功率控制参数的范围绑定;
第二接收单元, 用于接收基站发送的所述 UE的服务 AP的变化信息, 以 及所述承载有表示上行发送功率调整量的信息的下行信令;
修改单元,用于根据所述变化信息对所述上行功率控制参数的范围进行修 改;
第二调整单元,用于根据所述上行发送功率调整量以及当前的上行功率控 制参数的范围进行上行发送功率调整。
本发明实施例提供的功率控制方法、装置及网络设备, 能够在发送下行信 令给 UE的 AP和 UE的上行服务 AP不同时, 通过相应处理保证计算得到的 上行发送功率和上行传输所期望的上行发送功率相匹配,进而保证上行传输的 正常进行。
附图说明
图 1是本发明实施例一中场景一的情形一示意图;
图 2是本发明实施例一中场景一的情形二示意图;
图 3是本发明实施例一中场景二的情形一示意图;
图 4是本发明实施例一中场景二的情形二示意图;
图 5是本发明实施例一中场景二的情形三示意图;
图 6是本发明实施例五的功率控制装置结构示意图;
图 7是本发明实施例六的 UE结构示意图;
图 8是本发明实施例七的 UE结构示意图。
具体实施方式
本发明实施例提供一种功率控制方法、装置及网络设备, 能够在发送下行 信令给 UE的 AP和 UE的上行服务 AP不同时, 通过相应处理保证上行传输 的正常进行。 为使本发明的目的、 技术方案及优点更加清楚明白, 下面参照附 图并举实施例, 对本发明进一步详细说明。 需要说明的是, 本发明实施例中以 LTE系统为例进行说明并不对本发明构成限定,本领域技术人员应当理解本发 明还可以应用于其他系统或网络。 本发明实施例中所述服务 AP的含义包括上 行服务 AP以及下行服务 AP。 本发明实施例一
当发送下行信令给 UE的 AP和该 UE的上行服务 AP不同时, eNodeB获 得部分或全部上行服务 AP的参数, 该参数包括下面参数的至少一个:
1、 上行服务 AP测量得到的该 AP和该 UE之间的路径损耗, 其中, 该路
2、 上行服务 AP的小区特有的参数, 例如: LTE系统中表征期望的接收 功率值(P0 NORMINAL PUSCHU )、 表征对其它小区干扰的控制的参数(aG) )、 表 征是否根据 MCS调整功率的参数(Ks )等;
3、 上行服务 AP确定的 UE特有的参数, 需要说明的是, 所述上行服务 AP根据自身调度、 资源等确定所述参数; 所述 UE特有是指对每个 UE来说 参数可以不同, 这主要是由 eNodeB或 AP根据 AP自身调度、 资源等来确定 的。 例如: LTE 系统中表征期望 UE 对其它小区的干扰的控制参数
( PO_UE_PUSCHG) )等;
然后, eNodeB根据获得的这些参数, 计算出该 UE的上行发送功率调整 量, 再通过下行信令传递给该 UE, 该 UE接收到所述下行信令之后, 根据相 应的方式进行映射, 获取该上行发送功率调整量之后, 对上行功率进行调整。
而 eNodeB根据获得的所述参数计算所述上行发送功率调整量, 可以是对 从所有上行服务 AP获得的相应参数取其中之一; 或者是从所有上行服务 AP 获得的相应参数中取最大值、 或取最小值、 或取平均值等。
其中, 上述过程可以在所述 UE的上行和 /或下行服务 AP变化时进行。 eNodeB获得所述上行服务 AP 的所述参数的方式, 可以为通过所述 eNodeB 和所述 AP之间的各种连接方式, 包括光纤连接等; 当所述 UE的上行服务 AP 连接至不同 eNodeB时, 还可以通过 eNodeB之间的连接方式传递, 包括 X2 接口等。
另外, 所述上行发送功率调整量与所述下行信令的关系, 可以是所述下行 信令直接包含该功率调整量信息,也可以将该功率调整量信息隐含在其它下行 信令中传递至 UE, 即, 可以釆用高层信令(例如, LTE系统中的 higher layer signaling ), 也可以釆用现有技术中的功率控制信令。 而所述信令可以通过广 播信道、 下行控制信道传递给 UE。 此外, eNodeB传递下行信令给 UE的方式, 可以是直接传递给 UE, 也可 以首先将信令传递给 AP, 通过所述 AP再传递至 UE。
为了简便起见, 下面以一个 eNodeB连接至 2个 AP, 并且 UE最多被 2 个 AP服务的情形为例进行说明。
场景一: 上行和下行的服务 AP相同
eNodeB连接至 API和 AP2, UE的上行和下行的服务 AP都是相同的, 其中图 1显示了仅有 API服务 UE的情形,此时现有技术就能够达到较好的性 能;而图 2显示了 API和 AP2共同服务 UE的情形,如果釆用现有技术,即. UE 仅从 API接收下行信令, 见图 1B中的标注 "下行信令" (其中包括 API的功 率控制信息 Po— NORMINAL— PUSCHG)和 Po— UE— PUSCHG)信息 )并仅检测 API至 UE的 路径损耗, 从而计算得到 UE的上行发送功率, 则会造成 UE发送的上行信号 以 API期望的功率到达 API ,而由于 API的功率控制信息与 AP2的功率控制 信息存在差异, 并且所述 UE到 API和 AP2的路径损耗也存在差异, 则导致 所述 UE向所述 AP2发送上行信号的上行发送功率太大或太小。 因此,现有技 术在这样的场景中无法正常工作。釆用本发明技术方案则可以很好的实现, 具 体可以按照以下步骤进行:
1、 API和 AP2分别检测与 UE之间的上行路径损耗;
2、 API 和 AP2 分别将该路径损耗和与上行功率控制相关的参数传递给 eNodeB , 其中与功率控制相关的参数可以包括以下内容的至少一个:
1 ) API和 AP2期望接收到 UE的信号的接收功率值, 该值包括小区特有 的参数和 UE特有的参数中的至少一个, 但不限于所述参数, 或者是这二者计 算得到的值, 对于如何计算, 本发明不做限制, 即可以是这些参数的函数;
2 ) API和 AP2期望 UE进行功率控制时对路径损耗的进行补偿的补偿系 数, 该值可以是 0~1中的一个实数, 为 1时则表示完全补偿路径损耗值;
3 ) API和 AP2期望 UE进行功率控制时是否结合调制编码方案 ( MCS,
Modulation and Coding Scheme ) 来调整上行发送功率。 对不同小区, Ks值不 同, Ks取不同值时上行发送功率的调整不同, 例如, 对于小区 1 , 如果 Ks=0, 则表示上行发送功率不调整; 而对于小区 2, 如果 Ks=1.25 , 则表示上行发送 功率的调整为
Figure imgf000007_0001
其中 MPR表示釆用某种 MCS时每符号传 输的比特数。 这样, API和 AP2期望 UE进行功率控制时, 可以结合小区 1 和小区 2的不同 Ks值(例如对不同的 Ks值取函数), 来调整上行发送功率。
3、 eNodeB收到上述这些参数信息之后, 可以结合 API和 AP2的这些参 数来确定 UE的功率控制的参数, 例如:
1 )将 API和 AP2接收上行信号的期望接收功率值取平均,将得到的平均 值作为功率控制的参数;
2 )将 API和 AP2期望 UE进行功率控制时对路径损耗的进行的补偿取平 均, 将得到的平均值作为功率控制的参数;
3 )如果 API和 AP2其中有一方期望 UE结合 MCS来调整发送功率, 则 确定 UE结合 MCS来调整发送功率, 并生成相应的参数信息, 所述结合 MCS 来调整发送功率的方式在上文中已有阐述, 这里不再赘述;
4、 eNodeB通过下行信令将这些参数发送给 UE;
5、 UE收到该下行信令后, 解读信令, 并按照解读的结果调整上行发送功 率。
场景二: 上行和下行服务 AP不同
eNodeB连接至 API和 AP2 , 由于各个 AP的发送功率、 天线配置不同, 以及 UE与 AP之间上、 下行的信道衰落不同等各种原因, 可能造成上行和下 行服务 AP是不相同的。 例如, AP的发送功率高于 UE, 因此有可能 AP发送 的信号能够被 UE正常恢复出来, 而 UE发送的信号却不能被 AP正常恢复; 此时 UE的下行服务 AP可能多于 UE的上行服务 AP。 更进一步, 这样的情形 会导致发送下行信令给 UE的 AP与 UE的上行服务 AP不同。
在场景二中显示了其中的三种情形,在图 3中,UE的下行服务 AP是 API , 此时如果釆用现有技术, UE从 API接收下行信令(其中包括 API 的功率控 制信息 P0NORMINAL— PUSCHG)和 Ρθ— UE— PUSCHGM言息 )并仅检测 API至 UE的路径 损耗, 而上行服务 AP是 AP2 , 由于 API的功率控制信息与 AP2的功率控制 信息存在差异, 并且 API和 AP2的路径损耗也存在差异, 则会导致 UE到达 AP2的上行发送功率太大或太小。 而釆用本发明技术方案则可以很好的实现, 具体可以按照以下步骤进行:
1、 AP2检测与 UE之间的上行路径损耗; 2、 AP2将该路径损耗和与上行功率控制相关的参数传递给 eNodeB, 其中 与功率控制相关的参数可以包括以下内容的至少一个:
1 ) AP2期望接收到 UE的信号的接收功率值, 该值包括小区特有的参数 和 UE特有的参数中的至少一个, 但不限于所述参数, 或者是这二者计算得到 的值, 对于如何计算, 本发明不做限制, 即可以是这些参数的函数;
2 ) AP2期望 UE进行功率控制时对路径损耗进行补偿的补偿系数, 该值 可以是 0~1中的一个实数, 为 1时则表示完全补偿路径损耗值;
3 ) AP2期望 UE进行功率控制时是否结合 MCS来调整发送功率, 对不同 小区, Ks值不同, Ks取不同值时上行发送功率的调整不同, 例如, 对于小区 1 , 如果 Ks=0, 则表示上行发送功率不调整; 而对于小区 2, 如果 Ks=1.25, 则表示上行发送功率的调整为
Figure imgf000009_0001
其中 MPR表示釆用某种 MCS时每符号传输的比特数。 这样, API和 AP2期望 UE进行功率控制时, 可以结合小区 1和小区 2的不同 Ks值(例如对不同的 Ks值取函数), 来调整 上行发送功率。
3、 eNodeB收到上述这些信息之后,可以根据所述信息包含的上述参数来 确定 UE的上行功率控制的参数;
4、 eNodeB通过下行信令将这些参数发送给 UE;
5、 UE收到该下行信令后, 解读该信令, 并按照解读的结果调整上行发送 功率。
在图 4中, UE的下行服务 AP是 API和 AP2, 如果釆用现有技术, 即
UE从 API接收下行信令并仅检测 API至 UE的路径损耗, 而上行服务 AP是 AP2, 此时由于相同的原因会导致 UE到达 AP2的上行发送功率太大或太小。 而釆用本发明技术方案则可以很好的实现, 具体; 可以按照以下步骤进行: 1、 AP2检测与 UE之间的上行路径损耗;
2、 AP2将该路径损耗和与上行功率控制相关的参数传递给 eNodeB, 其中 与功率控制相关的参数可以包括以下内容的至少一个:
1 ) AP2期望接收到 UE的信号的接收功率值, 该值包括小区特有的参数 和 UE特有的参数中的至少一个, 但不限于所述参数, 或者是这二者计算得到 的值, 对于如何计算, 本发明不做限制, 即可以是这些参数的函数; 2 ) AP2期望 UE进行功率控制时对路径损耗进行补偿的补偿系数, 该值 可以是 0~1中的一个实数, 为 1时则表示完全补偿路径损耗值;
3 ) AP2期望 UE进行功率控制时是否结合 MCS来调整发送功率, 对不同 小区, Ks值不同, Ks取不同值时上行发送功率的调整不同, 例如, 对于小区 1 , 如果 Ks=0 , 则表示上行发送功率不调整; 而对于小区 2, 如果 Ks=1.25 , 则表示上行发送功率的调整为
Figure imgf000010_0001
其中 MPR表示釆用某种 MCS时每符号传输的比特数。 这样, API和 AP2期望 UE进行功率控制时, 可以结合小区 1和小区 2的不同 Ks值(例如对不同的 Ks值取函数), 来调整 上行发送功率。
3、 eNodeB收到上述这些信息之后, 可以根据 AP2的上述这些参数来确 定 UE的上行功率控制的参数;
4、 eNodeB通过下行信令将这些参数发送给 UE;
5、 UE收到该下行信令后, 解读信令, 并按照解读的结果调整上行发送功 率。
在图 5中, UE的下行服务 AP仅仅是 API , 并且下行信令通过 API发送 给 UE , 而上行服务 AP是 API和 AP2 , 则上行功率控制可以按照以下步骤进 行:
1、 API和 AP2检测与 UE之间的上行路径损耗;
2、 API 和 AP2 将该路径损耗和与上行功率控制相关的参数传递给 eNodeB, 其中与功率控制相关的参数可以包括以下内容的至少一个:
1 ) API和 AP2期望接收到 UE的信号的接收功率值, 该值包括小区特有 的参数和 UE特有的参数中的至少一个, 但不限于所述参数, 或者是这二者计 算得到的值, 对于如何计算, 本发明不做限制, 即可以是这些参数的函数;
2 )AP1和 AP2期望 UE进行功率控制时对路径损耗进行补偿的补偿系数, 该值可以是 0~1中的一个实数, 为 1时则表示完全补偿路径损耗值;
3 ) API和 AP2期望 UE进行功率控制时是否结合 MCS来调整发送功率, 对不同小区, Ks值不同, Ks取不同值时上行发送功率的调整不同, 例如, 对 于小区 1 ,如果 Ks=0,则表示上行发送功率不调整;而对于小区 2,如果 Ks=1.25 , 则表示上行发送功率的调整为
Figure imgf000010_0002
其中 MPR表示釆用某种 MCS时每符号传输的比特数。 这样, API和 AP2期望 UE进行功率控制时, 可以结合小区 1和小区 2的不同 Ks值(例如对不同的 Ks值取函数), 来调整 上行发送功率。
3、 eNodeB收到上述这些参数信息之后, 可以结合 API和 AP2的这些参 数来确定 UE的上行功率控制的参数, 例如:
1 )将 API和 AP2接收上行信号的期望接收功率值取平均,将得到的平均 值作为功率控制的参数;
2 )将 API和 AP2期望 UE进行功率控制时对路径损耗进行的补偿取平均, 得到的平均值作为功率控制的参数;
3 )如果 API和 AP2其中有一方期望 UE结合 MCS来调整发送功率, 则 确定 UE结合 MCS来调整发送功率, 并生成相应的参数信息;
4、 eNodeB通过下行信令将这些参数发送给 UE;
5、 UE收到该下行信令后, 映射信令, 并按照映射的结果调整上行发送功 率。
本发明实施例一能够在发送下行信令给 UE的 AP和 UE的上行服务 AP 不同时,通过相应处理保证计算得到的上行发送功率和上行传输所期望的上行 发送功率相匹配, 进而保证上行传输的正常进行。
本发明实施例二:
本发明实施例在上述实施例一的基础上将路径损耗的调整做特殊处理。即 当发送下行信令给 UE的 AP和 UE的上行服务 AP不同时, eNodeB还可以通过下 行信令 (路径损耗测量指令)通知 UE检测部分或全部上行服务 AP的路径损耗。 UE收到该信令之后,检测上行服务 AP的路径损耗,并应用在上行功率控制中。 例如, eNodeB通知 UE检测一个 AP的路径损耗, 那么 UE就检测那个路径损耗, 然后根据 eNodeB通知的补偿系数来计算发送功率;如果通知 UE检测多个 AP的 路径损耗, 则 UE可以检测多个路径损耗, 然后根据 eNodeB通知的补偿系数来 计算发送功率, 本发明实施例对计算方式不作限定。 而对于上行服务 AP的小 区特有的参数和上行服务 AP确定的 UE特有的参数,可以参见实施例一的过程, 如 LTE系统中表征期望 UE对其它小区的干扰的控制参数(P0— UE— PUSCHG) )等, 此处不再赘述。 其中, 在下行信令中可以包括上行服务 AP的标识(ID )或表征该信息的 信息。 其中, UE可以根据该上行服务 AP的标识或表征该信息的信息, 知道服 务 AP发送的下行信号, 以便解读下行信令; 或者检测下行信号, 从而获得上 行路径损耗。
本发明实施例二能够在发送下行信令给 UE的 AP和 UE的上行服务 AP不同 时,通过相应处理保证计算得到的上行发送功率和上行传输所期望的上行发送 功率相匹配, 进而保证上行传输的正常进行。
本发明实施例三:
本发明实施例在上述实施例一的基础上将 UE的服务 AP的变化情况与上行 功率控制参数的范围绑定。 即当 UE的上行和 /或下行服务 AP变化时, eNodeB 可以通过下行信令通知 UE服务 AP的变化情况; eNodeB还可以向 UE发送下行 功率控制信令。 UE收到所述服务 AP的变化情况的信息之后, 将其映射为对下 行信令中携带的上行功率控制参数范围的修改; 当 UE收到下行功率控制信令 之后,按照新的功率控制参数的范围解读下行功率控制信令,从而执行上行功 率的调整。
例如, 当上行服务 AP不变时, 上行功率控制参数的范围是 [-Α,Β] , 其中 -A 表示功率调整的最小值, B表示功率调整的最大值, 单位可以为 dB; 也可以是 实际值, 例如 LTE系统中, DCI format 3的范围是 [-1, 0, l, 3]dB, 表示可以选择 这四种功率调整中的一种; 当上行服务 AP增加时, eNodeB通过下行信令通知 UE, UE获知上行服务 AP增加后, 根据上行服务 AP增加的情况将其映射为上 行功率控制参数的范围为 [_C,D]; 当上行服务 AP减少时, eNodeB通过下行信 令通知 UE, UE获知上行服务 AP减少后, 根据上行服务 AP减少的情况映射上 行功率控制参数的范围为 [-E,F]。 当 UE收到下行功率控制信令后, 可以按照新 的上行功率控制参数的范围来映射该下行功率控制信令,从而对上行功率进行 调整。
本发明实施例三能够在发送下行信令给 UE的 AP和 UE的上行服务 AP不同 时,通过相应处理保证计算得到的上行发送功率和上行传输所期望的上行发送 功率相匹配, 进而保证上行传输的正常进行。
本发明实施例四: 当 UE的上行和 /或下行服务 AP变化时, eNodeB可以通过优先通知 UE上行 服务 AP的变化情况; UE收到该信息之后, 可以自动调整上行发送功率。 例如, 当上行服务 AP增加时, eNodeB通过下行信令通知 UE, UE获知上行服务 AP增 加后, 自动降低上行发送功率值; 当上行服务 AP减少时, eNodeB通过下行信 令通知 UE, UE获知上行服务 AP减少后, 自动提高上行发送功率值。
其中, eNodeB对 UE的服务 AP的变化情况的通知可以是下行信令直接包含 该信息, 也可以将该信息隐含在其它下行信令中传递至 UE。 UE自动调整的上 行发送功率值可以预先通过下行信令通知 UE。
所述上行发送功率调整量可以由 eNodeB通过多个功率控制信令传递至 UE, UE接收到多个控制信令之后, 执行所有功率控制信令的指令。 通过这种 方法可以扩展功率调整的范围,从而能够利用现有技术的功率控制方式来支持 本发明实施例。
例如,在 LTE系统中,上行功率控制的指令可以釆用下行控制指令(DCI, Downlink Control Indictater )格式 0 (取值范围为 [-4,-l,l,4]dB )和 DCI格式 3 (取值范围为 [-l,0,l,3]dB )来传递), 因此如果上行功率控制调整量为 7dB, 则可以同时传递包括指示功率调整为 4dB的 DCI格式 0和传递指示功率调整 为 3dB的 DCI格式 3的上行功率控制指令。 UE收到这两个指令之后, 就会调 整上行发送功率 7dB。
本发明实施例四除了能够在发送下行信令给 UE的 AP和 UE的上行服务 AP不同时, 通过相应处理保证计算得到的上行发送功率和上行传输所期望的 上行发送功率相匹配, 进而保证上行传输的正常进行。 更进一步的, 本发明实 施例四能够扩大功率控制的范围, 保证上行服务 AP变化时的上行传输性能。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件来完成,所述的程序可以存储于计算机可读 取存储介质中, 这里所称得的存储介质, 如: ROM/RAM、 磁碟、 光盘等。
如图 6所示, 为本发明实施例五提供的功率控制装置结构示意图, 包括: 判断单元 610和发送单元 620, 其中:
所述的判断单元 610, 用于判断 UE的下行服务 AP和该 UE的上行服务 AP是否相同; 所述的发送单元 620, 用于当所述判断单元 610确定所述 UE的下行服务 AP和该 UE的上行服务 AP不同时, 发送下行信令给所述 UE, 以使得所述 UE根据所述下行信令对上行发送功率进行调整。
优选的, 所述的装置还可以进一步包括获取单元 630, 用于从所述 UE的 至少一个上行服务 AP获得参数。 所述从上行服务 AP获得的参数包括下述参 数的至少一个:
上行服务 AP测量得到的该 AP和 UE之间的路径损耗;
上行服务 AP的小区特有的参数;
上行服务 AP确定的 UE特有的参数。
所述装置还可以包括第一计算单元 640, 用于根据所述获取单元 630获得 的参数, 计算出上行发送功率调整量; 相应的, 所述的发送单元 620, 还用于 将表示所述上行发送功率调整量的信息承载于所述下行信令中发送给所述 UE。
其中, 所述第一计算单元 640根据获得的参数,计算出上行发送功率调整 量具体为:
将从所述至少一个上行服务 AP获得的相应参数中取最大值; 或
将从所述至少一个上行服务 AP获得的相应参数中取最小值; 或
将从所述至少一个上行服务 AP获得的相应参数的平均值; 或
从所述至少一个上行服务 AP获得的相应参数中取其中一个参数。 上行服务 AP确定的 UE特有的参数中的至少一个, 以及路径损耗测量指令承 载在所述下行信令中发送给所述 UE。所述下行信令中还包括所述上行服务 AP 的标识 ID或表征该上行服务 AP标识的信息。
此外, 所述发送单元 620还用于将所述 UE的服务 AP的变化信息发送给 所述 UE, 以便所述 UE根据所述服务 AP的变化信息对所述上行功率控制参 数的范围进行修改。
另外, 所述获取单元 630, 还用于获取所述 UE的服务 AP的变化信息, 将所述信息发送给所述发送单元 620;
所述发送单元 620还用于向所述 UE预先发送包括所述 UE的服务 AP发 服务 AP发生变化时, 将承载有所述服务 AP的变化信息的下行信令发送给所 述 UE, 以使得所述 UE根据所述变化信息自动调整上行发送功率。
其中,所述发送单元 620不仅可以通过广播信道或下行控制信道将所述下 行信令发送给所述 UE。所述发送单元 620还可以通过所述 UE的下行服务 AP 将所述下行信令发送给所述 UE。
上述功率检测装置的各个实施例可以应用到相关的网络设备中,其装置的 结构如上所述, 此处不再赘述。
如图 7所示, 为本发明实施例六提供的 UE的结构示意图, 包括: 第一接 收单元 710、 测量单元 720、 第二计算单元 730、 及第一调整单元 740; 其中: 所述的第一接收单元 710, 用于接收基站发送的路径损耗测量指令及参 数;
所述的测量单元 720, 用于根据所述第一接收单元 710接收的路径损耗测 量指令测量所述 UE与至少一个所述 UE的上行服务 AP的路径损耗;
所述的第二计算单元 730, 用于根据所述测量得到的路径损耗以及所述从 基站获得的参数计算出上行发送功率调整量;
所述的第一调整单元 740, 用于根据所述第二计算单元 730计算得到的上 行发送功率调整量对上行发送功率进行调整。
如图 8所示, 为本发明实施例七提供的 UE的结构示意图, 包括: 预设单 元 810、 第二接收单元 820、 修改单元 830、 及第二调整单元 840; 其中: 所述的预设单元 810, 用于预先将所述 UE的服务 AP的变化信息与所述 UE的上行功率控制参数的范围绑定;
所述的第二接收单元 820, 用于接收基站发送的所述 UE的服务 AP的变 化信息, 以及所述承载有表示上行发送功率调整量的信息的下行信令;
所述的修改单元 830, 用于根据所述变化信息对所述上行功率控制参数的 范围进行修改;
所述的第二调整单元 840, 用于根据所述上行发送功率调整量以及当前的 上行功率控制参数的范围进行上行发送功率调整。
本发明提供了一种功率控制方法、装置及网络设备, 能够在发送下行信令 给 UE的 AP和 UE的上行服务 AP不同时, 通过相应处理保证用于计算上行 发送功率的相关参数和上行传输相匹配, 进而保证上行传输的正常进行。
需要说明一点, 本发明同样适用于接力传输系统(即, 文中的 AP可以替 换为中继节点 )或其它存在上行功率控制参数和上行传输不匹配的系统。
以上对本发明所提供的功率控制方法、 装置及网络设备进行了详细介绍, 说明只是用于帮助理解本发明的方案; 同时, 对于本领域的一般技术人员, 依 据本发明的思想, 在具体实施方式及应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种功率控制方法, 其特征在于, 包括:
若 UE的下行服务 AP和该 UE的上行服务 AP不同, 基站发送下行信令 给所述 UE, 以使得所述 UE根据所述下行信令对上行发送功率进行调整。
2、 根据权利要求 1所述的功率控制方法, 其特征在于, 所述基站发送下 行信令给所述 UE之前,
所述基站从所述 UE的至少一个上行服务 AP获得参数。
3、 根据权利要求 2所述的功率控制方法, 其特征在于, 所述基站从上行 服务 AP获得的参数包括下述参数的至少一个:
上行服务 AP测量得到的该 AP和 UE之间的路径损耗;
上行服务 AP的小区特有的参数;
上行服务 AP确定的 UE特有的参数。
4、 根据权利要求 2或 3所述的功率控制方法, 其特征在于, 所述基站获 得所述参数后, 进一步包括,
所述基站根据所述参数计算出上行发送功率调整量,将表示所述上行发送 功率调整量的信息承载于所述下行信令中发送给所述 UE。
5、 根据权利要求 4所述的功率控制方法, 其特征在于, 所述基站根据获 得的参数, 计算出对该 UE的上行发送功率调整量具体为:
所述基站从所述至少一个上行服务 AP获得的相应参数中取最大值; 或 所述基站从所述至少一个上行服务 AP获得的相应参数中取最小值; 或 所述基站取所述至少一个上行服务 AP获得的相应参数的平均值; 或 所述基站从至少一个上行服务 AP获得的相应参数中取其中一个参数。
6、 根据权利要求 2所述的功率控制方法, 其特征在于,
所述基站从所述 UE的至少一个上行服务 AP获得上行服务 AP的小区特 有的参数以及上行服务 AP确定的 UE特有的参数中的至少一个, 将所述参数 以及路径损耗测量指令承载在所述下行信令中发送给所述 UE;
所述 UE接收所述路径损耗测量指令, 测量所述 UE与至少一个所述 UE 的上行服务 AP的路径损耗;
所述 UE根据所述测量得到的路径损耗以及所述从基站获得的参数计算出 上行发送功率调整量,并根据所述上行发送功率调整量对上行发送功率进行调 整。
7、 根据权利要求 6所述的功率控制方法, 其特征在于,
所述下行信令中还包括所述上行服务 AP的标识 ID或表征该上行服务 AP 标识的信息。
8、 根据权利要求 4所述的功率控制方法, 其特征在于, 还包括: 所述 UE预先将所述 UE的服务 AP的变化信息与所述 UE的上行功率控 制参数的范围绑定;
若所述服务 AP发生变化, 则所述基站优先将所述 UE的服务 AP的变化 信息发送给所述 UE, 所述 UE根据所述服务 AP的变化信息对所述上行功率 控制参数的范围进行修改;
若所述 UE接收到所述承载有表示上行发送功率调整量的信息的下行信 令,则所述 UE根据所述上行发送功率调整量以及当前的上行功率控制参数的 范围进行上行发送功率调整。
9、 根据权利要求 8述的功率控制方法, 其特征在于,
所述表示上行发送功率调整量的信息通过至少一个下行控制指令实现。
10、 根据权利要求 1述的功率控制方法, 其特征在于,
所述基站向所述 UE预先发送包括所述 UE的服务 AP发生变化情况与所 述 UE的上行发送功率的映射关系的信息;
若所述 UE的服务 AP发生变化, 所述基站将承载有所述服务 AP的变化 信息的下行信令发送给所述 UE, 所述 UE根据所述变化信息自动调整上行发 送功率。
11、 根据权利要求 1-3中任一或 6或 7或 10所述的功率控制方法, 其特 征在于,
所述下行信令通过广播信道或下行控制信道发送给所述 UE。
12、 根据权利要求 1-3中任一或 6或 7或 10所述的功率控制方法, 其特 征在于,
所述基站通过所述 UE的下行服务 AP将所述下行信令发送给所述 UE。
13、 一种功率控制装置, 其特征在于, 包括: 判断单元, 用于判断用户设备 UE的下行服务接入点 ΑΡ和该 UE的上行 服务 ΑΡ是否相同; 上行服务 ΑΡ不同时, 发送下行信令给所述 UE, 以使得所述 UE根据所述下 行信令对上行发送功率进行调整。
14、 根据权利要求 13所述的功率控制装置, 其特征在于, 还包括: 获取单元, 用于从所述 UE的至少一个上行服务 ΑΡ获得参数;
第一计算单元, 用于根据所述获取单元获得的参数,计算出上行发送功率 调整量;
所述的发送单元,还用于将表示所述上行发送功率调整量的信息承载于所 述下行信令中发送给所述 UE。
15、 根据权利要求 14所述的功率控制装置, 其特征在于, 的参数、 上行服务 AP确定的 UE特有的参数中的至少一个, 以及路径损耗测 量指令承载在所述下行信令中发送给所述 UE。
16、 根据权利要求 14所述的功率控制装置, 其特征在于,
所述获取单元, 还用于获取所述 UE的服务 AP的变化信息, 将所述信息 发送给所述发送单元;
所述发送单元, 还用于将所述 UE的服务 AP的变化信息发送给所述 UE, 以便所述 UE根据所述服务 AP的变化信息对所述上行功率控制参数的范围进 行修改。
17、 一种 UE, 其特征在于, 包括:
第一接收单元, 用于接收基站发送的路径损耗测量指令及参数;
测量单元,用于根据所述第一接收单元接收的路径损耗测量指令测量所述 UE与至少一个所述 UE的上行服务 AP的路径损耗;
第二计算单元,用于根据所述测量得到的路径损耗以及所述从基站获得的 参数计算出上行发送功率调整量;
第一调整单元,用于根据所述第二计算单元计算得到的上行发送功率调整 量对上行发送功率进行调整。
18、 一种 UE, 其特征在于, 包括:
预设单元, 用于预先将所述 UE的服务 AP的变化信息与所述 UE的上行 功率控制参数的范围绑定;
第二接收单元, 用于接收基站发送的所述 UE的服务 AP的变化信息, 以 及所述承载有表示上行发送功率调整量的信息的下行信令;
修改单元,用于根据所述变化信息对所述上行功率控制参数的范围进行修 改;
第二调整单元,用于根据所述表示上行发送功率调整量的信息以及当前的 上行功率控制参数的范围进行上行发送功率调整。
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ES09841683.7T ES2552801T3 (es) 2009-03-16 2009-03-16 Método, aparato y dispositivo de red para control de potencia
US13/235,117 US8768401B2 (en) 2009-03-16 2011-09-16 Method, apparatus, and network device for power control
US14/285,711 US9008718B2 (en) 2009-03-16 2014-05-23 Method, apparatus, and network device for power control
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