WO2014206377A1 - 功率控制方法、装置及ue - Google Patents

功率控制方法、装置及ue Download PDF

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Publication number
WO2014206377A1
WO2014206377A1 PCT/CN2014/084876 CN2014084876W WO2014206377A1 WO 2014206377 A1 WO2014206377 A1 WO 2014206377A1 CN 2014084876 W CN2014084876 W CN 2014084876W WO 2014206377 A1 WO2014206377 A1 WO 2014206377A1
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WIPO (PCT)
Prior art keywords
dpcch
cell
target cell
power
value
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PCT/CN2014/084876
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English (en)
French (fr)
Inventor
胡文
鲁琳
夏苗方
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华为技术有限公司
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Publication of WO2014206377A1 publication Critical patent/WO2014206377A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a power control method, apparatus, and user equipment (User Equipment, UE). Background technique
  • a conventional radio access network mainly refers to a homogeneous network (HomoNet).
  • a base station in a homogeneous network may be referred to as a macro base station, a cell under a macro base station is referred to as a macro cell, and a macro base station has the same transmit power. With approximately the same coverage, it covers the entire network and provides uninterrupted communication services for the UE.
  • Heterogeneous Network HetNet
  • one or more micro base stations can be added on the basis of the macro base station network.
  • the cells under the micro base station are called micro cells, and the transmit power and coverage of the micro base stations are Far less than the macro base station.
  • the micro base station can be deployed in a hotspot area of the macro base station, and used for offloading the macro base station, thereby improving the throughput rate of the wireless access network.
  • the soft handover technology may be used for inter-cell handover.
  • Soft handover refers to the process of the UE moving from the source cell to the target cell.
  • the UE communicates with the source cell and the target cell in the active set after adding the target cell to the active set. After the UE enters the coverage area of the target cell, the UE then disconnects from the source cell.
  • the UE needs to combine the Transmission Power Control (TPC) command words sent by each cell in the active set, and adjust the dedicated physical control channel according to the combined TPC command word (Dedicated).
  • TPC Transmission Power Control
  • DPCCH Physical Control Channel
  • the initial UE is closer to the micro base station, so the adjustment of the transmit power of the DPCCH by the UE is mainly sent by the micro base station.
  • the UE may disconnect from the micro cell when The macro cell has not been added to the active set, so that the UE cannot switch to the macro cell, causing the UE to lose synchronization.
  • the power control method, the device, and the UE are provided to solve the problem that the UE is out of synchronization in the soft handover process of the UE moving from the source cell to the target cell.
  • a power control method includes:
  • control message that is sent by the receiving network device includes:
  • the performing, according to the parameter of the target cell, performing open loop power control on a transmit power of the DPCCH includes:
  • the parameter of the target cell includes at least one of the following parameters: a DPCCH power offset value for accessing the target cell; a DPCCH power boost value of the target cell; a dominant frequency transmit power value of the target cell;
  • the UE performs open loop power control on the transmit power of the DPCCH according to the parameters of the target cell in any of the following manners:
  • the UE obtains a difference between the DPCCH power offset value and a pilot channel received code power value of the target cell, and obtains a power control history value of the saved DPCCH, determining a larger value of the difference and the power control history value of the DPCCH as a transmit power of the DPCCH;
  • the UE obtains a power control history value of the saved DPCCH, and compares the power control history value of the DPCCH with the DPCCH power boost value. Determining the transmit power of the DPCCH; [23] when the parameter of the target cell includes the pilot transmit power value, the UE obtains a power control history value of the saved DPCCH, and according to the dominant transmit power a value-calculated power candidate value, where a power control history value of the DPCCH and a larger value of the power candidate value are determined as a transmit power of the DPCCH, where the power candidate value is the power control history value Adding the dominant frequency transmit power value and the pilot channel received code power value of the source cell, and subtracting the value of the dominant frequency transmit power value of the source cell and the pilot channel received code power value of the target cell .
  • the method further includes: [25] the UE determines whether the UE meets an open loop power control condition;
  • the performing open loop power control on the transmit power of the DPCCH according to the parameter of the target cell includes: when the judgment result is that the UE meets the open loop power control condition, according to the parameter of the target cell to the DPCCH
  • the transmit power is subjected to open loop power control; [27] wherein the open loop power control conditions include:
  • the speed estimation value of the UE is higher than a set speed threshold
  • the UE When the UE receives an active set update message that is sent by the network device and adds the target cell to the active set of the UE, the UE is in a downlink synchronization state, and is received within a preset time period. The quality of the DPCCH sent by the source cell is lower than the set quality threshold.
  • the performing open loop power control on a transmit power of the DPCCH according to the parameter of the target cell includes: receiving the Performing open-loop power control on the transmit power of the DPCCH according to the parameters of the target cell on a preset number of time slots after the control message; [31] the method further includes: after the preset number of time slots The time slot is used to adjust the transmit power of the DPCCH according to the transmit power control TPC command word sent by the base station of the active set cell of the UE.
  • the UE moving process includes the UE moving from a micro cell The process of going to the macro cell;
  • the target cell is specifically the macro cell, and the source cell is the micro cell.
  • a power control device comprising:
  • a receiving unit configured to receive, by the network device, a control message sent by the network device, where the control message includes a parameter of the target cell, where the network device is a base station of the target cell or a base station of the source cell
  • the source cell is a serving cell before the cell handover, and the target cell is a serving cell after the cell handover by the UE;
  • the control unit is configured to perform open loop power control on the transmit power of the DPCCH according to the parameter of the target cell received by the receiving unit, so that the base station of the target cell receives the DPCCH transmitted by the UE.
  • the receiving unit is specifically configured to receive, by the network device, activation of an active set that joins the target cell to the UE And the receiving the update message; or the receiving, by the network device, the serving cell update message that is used by the network device to switch the serving cell of the UE to the target cell; or An activation set update message that is deleted from the active set by the source cell; or, a new control message that is sent by the network device to carry the parameter of the target cell;
  • the control unit is specifically configured to: when the receiving unit receives an active set update message that adds the target cell to an active set of the UE, establish a wireless link between the UE and the target cell. And performing open-loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or, when the receiving unit receives the serving cell update message that is to switch the serving cell of the UE to the target cell, When the UE switches the serving cell to the target cell, performing open loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or, when the receiving unit receives the source cell from being activated When the activated set update message is deleted, when the UE disconnects the radio link with the source cell, the open loop power control is performed on the transmit power of the DPCCH according to the parameter of the target cell.
  • the parameter of the target cell that is received by the receiving unit includes at least one a parameter: a DPCCH power offset value of the target cell; a DPCCH power boost value of the target cell; a dominant frequency transmit power value of the target cell;
  • control unit comprises at least one of the following subunits:
  • a first control subunit configured to obtain, when the parameter of the target cell received by the receiving unit includes the DPCCH power offset value, the DPCCH power offset value and a pilot channel of the target cell a difference between the received code power values, and a power control history value of the saved DPCCH, and determining a larger value of the difference and the power control history value of the DPCCH as the transmit power of the DPCCH;
  • a second control subunit configured to obtain a power control history value of the saved DPCCH when the parameter of the target cell received by the receiving unit includes the DPCCH power boost value, and the power control history of the DPCCH And a sum of the value and the DPCCH power boost value is determined as a transmit power of the DPCCH;
  • a third control subunit configured to: when the parameter of the target cell received by the receiving unit includes the pilot frequency And transmitting, when the power value is obtained, a power control history value of the saved DPCCH, and a power candidate value calculated according to the pilot frequency transmission power value, and comparing a power control history value of the DPCCH with a larger value of the power candidate value Determining the transmit power of the DPCCH, where the power candidate value is the power control history value plus the pilot transmit power value and the pilot channel receive code power value of the source cell, and subtracting the The value of the dominant frequency transmit power value of the source cell and the pilot channel received code power value of the target cell.
  • the device in combination with the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, also includes:
  • a determining unit configured to determine whether the UE meets an open loop power control condition
  • the control unit is specifically configured to perform open loop power control on the transmit power of the DPCCH according to the parameter of the target cell when the judgment result of the determining unit is that the UE meets the open loop power control condition ;
  • open loop power control conditions include:
  • the speed estimation value of the UE is higher than a set speed threshold
  • the UE When the UE receives an active set update message that is sent by the network device and adds the target cell to the active set of the UE, the UE is in a downlink synchronization state, and is received within a preset time period. The quality of the DPCCH sent by the source cell is lower than the set quality threshold.
  • control unit is specifically configured to: according to a parameter of the target cell, a DPCCH, on a preset number of time slots after the receiving unit receives the control message The transmit power is used for the open loop power control; [51] the control unit is further configured to: according to the TPC command word sent by the base station of the active centralized cell of the UE, on the time slot after the preset number of time slots Adjusting the transmit power of the DPCCH.
  • the receiving unit is specifically configured to: when the UE moves from the micro cell to the macro cell, the receiving network device sends the The control message includes the parameter of the macro cell, where the target cell is the macro cell, and the source cell is the micro cell.
  • a UE in a third aspect, includes: a wireless transceiver and a processor, where [54] the wireless transceiver is configured to receive, by the network device, a control message sent by the network device, where the control message includes a parameter of the target cell, where the network device is a base station of the target cell or a base station of the source cell, the source cell is a serving cell before the cell handover, and the target cell is a serving cell after the cell handover by the UE; [55] the processor is configured to The parameter of the target cell performs open loop power control on the transmit power of the DPCCH, so that the base station of the target cell receives the DPCCH transmitted by the UE.
  • the wireless transceiver is specifically configured to receive, by the network device, an activation set that adds the target cell to the UE
  • the activation set update message is sent; or the serving cell update message sent by the network device to switch the serving cell of the UE to the target cell; or the receiving network device sends the indication that the UE sends the source cell
  • the processor is specifically configured to: when the wireless transceiver receives an active set update message that is sent by the network device and adds the target cell to an active set of the UE, When the wireless link is established, performing open-loop power control on the transmit power of the DPCCH according to the parameters of the target cell; or, when the wireless transceiver receives the serving cell sent by the network device, switching the serving cell of the UE to the When the serving cell update message of the target cell is used, when the serving cell is switched to the target cell, performing open loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or, when the wireless transceiver Receiving, by the network device, the activation set update message indicating that the UE deletes the source cell from the active set, when disconnecting the wireless link with the source cell, according to the parameter pair of the target cell
  • the transmit power of the DPCCH is subjected to open loop power control.
  • the parameter of the target cell that is received by the wireless transceiver includes at least a parameter of: a DPCCH power offset value for accessing the target cell; a DPCCH power boost value of the target cell; a dominant frequency transmit power value of the target cell;
  • the processor is specifically configured to: when the parameter of the target cell includes the DPCCH power offset value, obtain the DPCCH power offset value and a pilot channel received code power value of the target cell. a difference value, and obtaining a power control history value of the saved DPCCH, determining a larger value of the difference value and a power control history value of the DPCCH as a transmit power of the DPCCH; or, when When the parameter includes the DPCCH power boost value, obtain a power control history value of the saved DPCCH, and determine a sum of the power control history value of the DPCCH and the DPCCH power boost value as a transmit power of the DPCCH; or, when When the parameter of the target cell includes the dominant frequency transmit power value, obtain a power control history value of the saved DPCCH, and a root Determining, according to the power candidate value calculated by the pilot transmit power value, a power control history value of the DPCCH and a larger value of the power candidate value as a transmit power of the DPCCH, where the power
  • the processor is further configured to determine whether the UE meets an open loop power control condition;
  • the processor is specifically configured to: when the UE determines that the UE meets the open loop power control condition, perform open loop power control on a transmit power of the DPCCH according to a parameter of the target cell;
  • the open loop power control condition includes:
  • the speed estimation value of the UE is higher than a set speed threshold
  • the UE When the UE receives an active set update message that is sent by the network device and adds the target cell to the active set of the UE, the UE is in a downlink synchronization state, and is received within a preset time period. The quality of the DPCCH sent by the source cell is lower than the set quality threshold.
  • the processor In combination with the third aspect, or the first possible implementation of the third aspect, or the second possible implementation of the third aspect, or the third possible implementation of the third aspect, in the third In a fourth possible implementation manner of the aspect, the processor is specifically configured to: according to a parameter pair of the target cell, on a preset number of time slots after the wireless transceiver receives the control message The transmit power of the DPCCH is subjected to open loop power control;
  • the processor is further configured to adjust a transmit power of the DPCCH according to a TPC command word sent by a base station of a cell in the active set of the UE, in a time slot after the preset number of time slots.
  • the wireless transceiver is specifically configured to receive the network device when the UE moves from the micro cell to the macro cell And a control message, where the control message includes a parameter of the macro cell, where the target cell is the macro cell, and the source cell is the micro cell.
  • the control message including the parameter of the target cell delivered by the network device is received, and the open loop power of the transmit power of the DPCCH is controlled according to the parameter of the target cell, so as to achieve the target.
  • the base station of the cell receives the DPCCH transmitted by the UE.
  • the transmit power of the DPCCH can be opened and closed according to the parameters of the target cell.
  • the transmit power of the DPCCH is adjusted according to the TPC command word, and the target base station can be moved by the UE by using the open loop power control.
  • the DPCCH transmitted by the UE may be received, so as to ensure that the UE can join the target cell to the active set before disconnecting from the source cell, so that the UE can switch to the target cell.
  • FIG. 1 is a block diagram of an embodiment of a power control method according to the present invention.
  • FIG. 2 is a block diagram of another embodiment of a power control method according to the present invention.
  • Figure 3 is a block diagram of an embodiment of a power control device of the present invention.
  • FIG. 4 is a block diagram of another embodiment of a power control device of the present invention.
  • FIG. 5 is a block diagram of an embodiment of a UE according to the present invention. detailed description
  • FIG. 1 is a flowchart of an embodiment of a power control method according to the present invention.
  • Step 101 When a UE moves, receiving a control message sent by a network device, where the control message includes parameters of a target cell. .
  • the pilot signal quality of the target cell gradually becomes better, when the pilot signal quality of the target cell exceeds the preset first quality gate.
  • the time limit is that the UE reports the pilot signal quality of the target cell to the network device, and the foregoing process is a la event.
  • the network device allows the UE to add the target cell to the active set according to the quality of the pilot signal reported by the UE, the network device sends the activation to the UE.
  • the set update message the UE adds the target cell to the active set according to the active set update message, where the UE and the source cell and the target The cell simultaneously communicates; when the UE continues to move to the target cell, and the pilot signal quality of the target cell exceeds the pilot signal quality of the source cell, the UE sends the pilot signal quality of the target cell to the network device, where the process is an Id event.
  • the network device When the network device sends a serving cell update message to the UE according to the pilot signal quality reported by the UE, the UE switches the serving cell from the source cell to the target cell; when the pilot signal quality of the source cell in the active set is lower than the preset When the second quality threshold is used, the UE reports the quality of the pilot signal of the source cell to the network device, and the foregoing process is a lb event.
  • the network device determines that the UE leaves the source cell according to the quality of the pilot signal reported by the UE, the network device sends the signal to the UE.
  • the set update message is activated, and the UE deletes the source cell from the active set according to the active set update message, and disconnects from the source cell.
  • the active set refers to a set of cells that have a wireless link connection with the UE.
  • HetNet as a heterogeneous network, can be composed of cells of different sizes and different types.
  • the cells can include: a macro cell (macro ce ll) and a micro cell (micro cel l)
  • macro cell macro ce ll
  • micro cel l micro cell
  • the micro cell is only a generalized description for distinguishing the macro cell, that is, the micro cell is a type of cell whose coverage is smaller than the macro cell, and may specifically include the pico cell (pi co ce 11 ) and the femto.
  • the embodiment of the present invention is not limited to the femto cel l or the like.
  • the micro cell when the UE performs soft handover, the micro cell may be used as the source cell, and the macro cell is used as the target cell.
  • the LA event may be When the Id event, or the lb event occurs, the open loop power control process of the embodiment of the present invention is performed.
  • the UE may receive an active set update message that is sent by the network device and adds the macro cell to the active set of the UE when the LA event occurs. Alternatively, the UE may also receive the information sent by the network device when the Id event occurs.
  • the UE may also send the indication sent by the network device to the UE to delete the micro cell from the active set when the lb event occurs. Activate the set update message.
  • the network device may carry the parameter of the macro cell in the message when the any message is sent, or the network device may also send the macro cell to the UE when the any message is sent.
  • the newly added control message of the parameter that is, when the network device sends the parameter of the macro cell to the UE, the network device can reuse the message in the prior art or add a message.
  • the network device may be a base station of the target cell or a base station of the source cell, where the source cell is a serving cell before the cell handover, and the target cell is a serving cell after the cell handover by the UE
  • the control message sent by the network device to the UE is sent by the radio network controller (RNC) to the network device.
  • RNC radio network controller
  • the parameter of the target cell included in the control message may include at least one of the following parameters: a DPCCH power offset value of the access target cell; a DPCCH power boost value of the target cell; and a dominant frequency transmit power value of the target cell.
  • the DPCCH power offset value of the access target cell is a bias of a minimum power value required by the base station of the target cell to demodulate the DPCCH in the current interference situation with respect to the dominant frequency transmit power of the target cell;
  • the DPCCH power boost value is a power value of the target cell in which the transmit power of the DPCCH needs to be increased relative to the transmit power of the previous DPCCH;
  • the base station transmit power value of the target cell is the base station of the target cell broadcasting the primary common pilot in the entire target cell.
  • the transmit power at the Primary Common Pilot Channel (PCPICH) has only one PCPICH per cell.
  • Step 102 Perform open-loop power control on the transmit power of the DPCCH according to the parameter of the target cell, so that the base station of the target cell receives the DPCCH transmitted by the UE.
  • the UE moves from the micro cell that is the source cell to the macro cell that is the target cell, where the UE receives the macro cell and sends the UE to the UE in step 101.
  • the active set of the active set is updated, the UE performs open-loop power control on the transmit power of the DPCCH according to the parameters of the macro cell when establishing the radio link with the macro cell;
  • the serving cell of the UE is switched to the serving cell update message of the macro cell, when the UE switches the serving cell to the macro cell, the UE performs open loop power control on the transmit power of the DPCCH according to the parameters of the macro cell;
  • the UE receives the network in step 101 When the UE sends an activation set update message indicating that the UE deletes the micro cell from the active set, the UE performs open loop power control on the transmit power of the DPCCH according to the parameters of the macro cell when disconnecting the radio link with the micro cell.
  • the parameters of the macro cell when disconnecting the radio link with the micro cell
  • the UE may obtain the difference between the DPCCH power offset value and the pilot channel received code power value of the macro cell. And obtaining a power control history value of the saved DPCCH, determining a larger value of the difference and the power control history value of the DPCCH as a transmit power of the DPCCH; when the parameter of the macro cell received by the UE in step 101 includes a macro cell
  • the UE may obtain the power control history value of the saved DPCCH, and determine the sum of the power control history value of the DPCCH and the DPCCH power boost value as the transmit power of the DPCCH; when the UE receives the macro cell in step 101
  • the parameter includes the dominant frequency transmit power value of the macro cell
  • the UE may obtain the power control history value of the saved DPCCH, and the power candidate value calculated according to the dominant frequency transmit power value of the macro cell, and the power control
  • the transmit power of the DPCCH can be controlled according to the parameters of the target cell, and the DPCCH is adjusted according to the TPC command word in the prior art.
  • the macro base station can receive the DPCCH transmitted by the UE during the UE mobile process, especially during the UE high-speed mobile process, so as to ensure that the UE disconnects from the source cell before the UE disconnects from the source cell.
  • the target cell can be added to the active set so that the UE can switch to the target cell.
  • FIG. 2 it is a flowchart of another embodiment of a power control method according to the present invention.
  • the embodiment is based on a HetNet networking architecture, and details a power control process of a UE moving from a micro cell to a macro cell:
  • Step 201 The UE moves from the micro cell to the macro cell.
  • HetNet as a heterogeneous network, may be composed of cells of different sizes and different types.
  • the cells may include: a macro cell (macro ce ll) and a micro cell (mi cro cel l).
  • the micro cell is only a generalized description for distinguishing the macro cell, that is, the micro cell is a type of cell whose coverage is much smaller than that of the macro cell, and may specifically include a pico cell (p ico ce ll ) and a femto cell ( Femto cel l) and the like, which are not limited in this embodiment of the present invention.
  • the micro cell serves as a source cell
  • the macro cell serves as a target cell
  • the UE moves from the micro cell to the macro cell.
  • Step 202 The UE determines whether the open loop power control condition is met, and if yes, performs step 203; otherwise, performs step 206.
  • the UE Before performing the open loop power control in this embodiment, the UE may first determine whether the open loop power control condition is met. If the open loop power control condition is met, the open loop power control of the embodiment of the present invention may be performed. Under the open loop power control condition, the power control can be performed by the TPC command word according to the prior art.
  • the open loop power control condition may be that the UE speed estimation value is higher than the set speed threshold, that is, the UE determines whether the UE speed estimation value is higher than the set speed threshold.
  • the UE may use an existing speed estimation method to estimate the speed in each period according to a preset period, and obtain a speed estimation value. If the UE moves from the micro cell to the macro cell, the speed estimation value is higher than the set speed threshold. It is to be noted that the UE is currently in a high-speed movement, and the risk of out-of-synchronization is large. Therefore, the open-loop power control scheme of the embodiment of the present invention can be used.
  • the open loop power control condition may also be that when the UE receives the active set update message that is sent by the network device and adds the macro cell to the active set of the UE, that is, the LA event occurs when the UE is in the soft handover process.
  • the UE After receiving the active set update message sent by the network device and adding the macro cell to the active set, the UE is in a downlink synchronization state, and the quality of the DPCCH sent by the micro cell received in the preset time period is lower than the set quality gate.
  • the limit value indicates that the link quality of the micro cell is poor, and the macro cell has not yet joined the active set, and the risk of UE out of synchronization is large. Therefore, the open loop function of the embodiment of the present invention can be used. Control plan.
  • Step 203 The UE receives a control message sent by the network device, where the control message includes a parameter of the macro cell.
  • the UE may adopt the open loop power control scheme of the embodiment of the present invention.
  • the network device may be specifically an RNC
  • the control message sent by the RNC may be specifically an existing control message sent by the RNC to the UE after the la event, or the Id event, or the lb event occurs in the soft handover process. Or a new control message sent by the RNC to the UE.
  • the UE may receive an active set update message that is sent by the network device to join the active set of the UE when the LA event occurs; or the UE may also receive the network device when the Id event occurs. Transmitting the serving cell of the UE to the serving cell update message of the macro cell; or, the UE may also send the indication sent by the network device to the UE to send the micro cell from the active set when the lb event occurs.
  • the deleted activation set update message may carry the parameter of the macro cell in the message when the foregoing message is sent, or the network device may send the macro cell to the UE simultaneously when the any message is sent. New control message for the parameter.
  • the parameter of the macro cell included in the control message may include at least one of the following parameters: a DPCCH power offset value of the access macro cell (DPCCH_Power_offset_Macro); a DPCCH power boost value of the macro cell (DPCCH_Power_Boost_Macro); Primary CPICH TX Power Macro.
  • DPCCH_Power_offset_Macro a DPCCH power offset value of the access macro cell
  • DPCCH_Power_Boost_Macro DPCCH power boost value of the macro cell
  • Primary CPICH TX Power Macro Primary CPICH TX Power Macro.
  • Step 204 The UE determines whether it is currently in a preset number of time slots after receiving the control message, and if yes, step 205 is performed; otherwise, step 206 is performed.
  • the UE may perform the open loop power control scheme of the embodiment of the present invention in the entire soft handover process, and the purpose of performing the open loop power control scheme is to enable the UE to switch from the micro cell to the macro cell.
  • the UE does not lose the step, so the UE can perform the open loop power control scheme in a preset number of time slots after receiving the control message, so as to ensure that the UE does not lose synchronization, and the preset number of time slots are subsequent.
  • the slot can still be compatible with existing solutions for power control via the TPC command word.
  • the preset number of time slots may specifically establish a radio link between the UE and the macro cell.
  • the first time slot of the (Radio Link, RL) when the UE receives the serving cell update message that is sent by the network device to switch the serving cell of the UE to the macro cell in step 203, the preset number of time slots may be specific. Switching the serving cell to the first time slot of the macro cell for the UE; when the UE receives the indication sent by the network device in step 203, the UE activates the micro cell from the cell.
  • the preset number of time slots may be specifically the first time slot of the radio link disconnected from the micro cell by the UE. It should be noted that, in the actual application, the preset number of time slots may not be limited to the first time slot, which is not limited in this embodiment of the present invention.
  • Step 205 The UE performs open loop power control on the transmit power of the DPCCH according to the parameters of the macro cell, and returns to step 204.
  • the UE may perform open loop power on the transmit power of the DPCCH according to the parameter of the macro cell.
  • the first mode when the parameter of the macro cell received by the UE in step 203 includes the DPCCH power offset value (DPCCH_Power_of f set_Macro) of the access macro cell, the UE can obtain the DPCCH power offset value (DPCCH_Power_offset_Macro) and The pilot channel of the macro cell receives the difference between the code power value (CPICH_RSCP_Macro) and the power control history value (DPCCH_Current_Power) of the saved DPCCH, and determines the difference between the difference and the power control history value of the DPCCH as
  • DPCCH_Ini tial_power represents the transmit power value of the DPCCH of the current slot
  • the DPCCH power offset value (DPCCH_Power_offset_Macro) of the access macro cell indicates that the base station demodulates the lowest received power of the DPCCH of the macro cell in the current interference situation.
  • the offset of the dominant channel transmit power of the macro cell; the pilot channel received code power value of the macro cell (CPICH_RSCP_Macro) can be measured by the UE; the power control history value of the DPCCH (DPCCH_Current_P OW er ) indicates that the UE saves according to the prior art
  • the transmit power value of the DPCCH of the current time slot obtained by the TPC command word.
  • the second mode when the parameter of the macro cell received by the UE in step 203 includes the DPCCH power boost value (DPCCH_Power_Boost_Macro) of the macro cell, the UE may obtain the power control history value (DPCCH_Current_Power) of the saved DPCCH, and the DPCCH
  • the sum of the power control history value (DPCCH_Current_Power) and the DPCCH power boost value (DPCCH_Power_Boost_Macro) is determined as the transmit power of the DPCCH, that is, the open loop power control can adopt the following formula:
  • DPCCH_Init ial_power DPCCH_Current_Power+DPCCH_Power_Boost_Macro ;
  • DPCCH_Initial_power represents the transmit power value of the DPCCH of the current slot;
  • the power control history value of the DPCCH represents the DPCCH of the current slot obtained by the UE according to the prior art through the TPC command word.
  • the transmit power value; the DPCCH power boost value of the macro cell indicates the power value at which the transmit power of the next DPCCH of the macro cell needs to be increased relative to the transmit power of the current DPCCH when the UE establishes a connection with the macro cell.
  • the third mode When the parameter that the UE receives the macro cell in step 203 includes the dominant frequency transmit power value of the macro cell (Primary_CPICH_TX_power_Macro), the UE can obtain the power control history value of the saved DPCCH (DPCCH_Curre n t_P OW er And determining, according to the power candidate value calculated by the dominant frequency transmit power value (Primary_CPICH_TX_power_Macro) of the macro cell, a larger value of the DPCCH power control history value (DPCCH_Current_Power) and the power candidate value as the transmit power of the DPCCH, where The power candidate value is a power control history value (DPCCH_Curre n t_P OW er) plus a dominant frequency transmit power value of the macro cell (Primary_CPICH_TX_power_Macro) and a pilot channel received code power value of the micro cell (CPICH_RSCP_LPN), and subtracting the micro cell
  • DPCCH_Initial_power max (DPCCH Current Power, DPCCH_Current_Power+ Primary_CPICH_TX_power_Macro-Primary_CPICH_TX_power_LPN-CPICH_RSCP_Macro+ CPICH_RSCP_LPN);
  • DPCCH_Initial_power represents the transmit power value of the DPCCH of the current slot
  • the power control history value of the DPCCH represents the transmit power of the DPCCH of the current slot obtained by the UE according to the prior art through the TPC command word. Value
  • CPICH_RSCP_LPN is the pilot channel received code power of the micro cell measured by the UE; the dominant frequency transmit power value of the micro cell (Primary_CPICH_TX_p OWe r_LPN ) and the pilot channel received code power value of the macro cell
  • Step 206 The UE adjusts the transmit power of the DPCCH according to the TPC command word sent by the base station, and ends the current process.
  • the UE may perform power control according to the prior art, that is, adjust the transmission of the DPCCH according to the TPC command word sent by the base station of the cell in the UE active set. power.
  • step 204 When the judgment result in step 204 is that the current time slot is not in the preset number of time slots after receiving the control message If the current time slot is a time slot after a preset number of time slots, the UE can also perform power control according to the prior art.
  • the UE receives the active set update message that is sent by the network device and adds the macro cell to the active set of the UE, the active set includes the micro cell and the macro cell, and the UE delivers the micro base station and the macro base station according to the micro base station and the macro base station.
  • the TPC command word adjusts the transmit power of the DPCCH.
  • the active set still includes the micro cell and the macro cell, so the UE The transmit power of the DPCCH is still adjusted according to the TPC command word sent by the micro base station and the macro base station; when the UE receives the active set update message that is sent by the network device to instruct the UE to delete the micro cell from the active set in step 203, the UE activates The concentrating only includes the macro cell, so the UE adjusts the transmit power of the DPCCH according to the TPC command word sent by the macro eNB.
  • the transmit power of the DPCCH is greatly increased instantaneously, and the closed loop power control adjustment after a period of time is required, and the transmission of the DPCCH is adjusted through the TPC command word.
  • the power, the uplink power control loop of the UE will converge, so the network equipment, such as the RNC, may adjust the target signal to interference ratio (SIR_Taget) of the DPCCH without considering the data in the above time period. .
  • SIR_Taget target signal to interference ratio
  • the UE can perform open-loop control on the transmit power of the DPCCH according to the parameters of the macro cell, and The prior art adjusts the transmit power of the DPCCH according to the TPC command word. Because the open loop power control is used, the macro base station can receive the DPCCH transmitted by the UE during the UE mobile process, especially during the high-speed mobile operation of the UE, thereby ensuring The UE may join the macro cell to the active set before disconnecting from the micro cell, so that the UE can switch to the macro cell.
  • the present invention also provides an embodiment of a power control device and a UE.
  • FIG. 3 it is a block diagram of an embodiment of a power control apparatus according to the present invention:
  • the device includes: a receiving unit 310 and a control unit 320.
  • the receiving unit 310 is configured to receive, by the network device, a control message that is sent by the network device, where the control message includes a parameter of the target cell, where the network device is a base station or a source of the target cell. a base station of the cell, where the source cell is a serving cell before the cell handover, and the target cell is a serving cell after the cell handover by the UE;
  • the control unit 320 is configured to: according to the parameter of the target cell received by the receiving unit 310, the DPCCH The transmit power is subjected to open loop power control, so that the base station of the target cell receives the DPCCH transmitted by the UE.
  • the receiving unit 310 may be specifically configured to receive, by the network device, an activation set update message that is sent by the network device to the active set of the UE, or The serving cell of the UE is switched to the serving cell update message of the target cell; or the receiving device sends an active set update message that is sent by the network device to indicate that the UE deletes the source cell from the active set; or, the receiving network device The newly added control message for carrying the parameter of the target cell;
  • the control unit 320 may be specifically configured to: when the receiving unit 310 receives an active set update message that adds the target cell to an active set of the UE, establish, in the UE, the target cell When the radio link is used, performing open loop power control on the transmit power of the DPCCH according to the parameters of the target cell; or, when the receiving unit 310 receives the serving cell update that switches the serving cell of the UE to the target cell And when the UE switches the serving cell to the target cell, performing open-loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or, when the receiving unit 310 receives the When the source cell disconnects the active set update message from the active set, when the UE disconnects the wireless link with the source cell, the open loop power control is performed on the transmit power of the DPCCH according to the parameter of the target cell.
  • the parameter of the target cell received by the receiving unit 310 includes at least one of the following parameters: a DPCCH power offset value for accessing the target cell; a DPCCH power boost value of the target cell; The dominant frequency transmit power value; [128] the control unit 320 may include at least one of the following subunits (not shown in FIG. 3):
  • a first control subunit configured to obtain the DPCCH power offset value and the pilot of the target cell when a parameter of the target cell received by the receiving unit 310 includes the DPCCH power offset value a difference between a channel received code power value and a power control history value of the saved DPCCH, and a larger value of the difference and the power control history value of the DPCCH is determined as a transmit power of the DPCCH;
  • a second control subunit configured to: when the parameter of the target cell received by the receiving unit 310 includes the DPCCH power boost value, obtain a power control history value of the saved DPCCH, and set a power control history value of the DPCCH And a sum of the DPCCH power boost value is determined as a transmit power of the DPCCH;
  • a third control subunit configured to: when the parameter of the target cell received by the receiving unit 310 includes the main And obtaining, by the pilot transmission power value, a power control history value of the saved DPCCH, and a power candidate value calculated according to the pilot frequency transmission power value, comparing a power control history value of the DPCCH with the power candidate value
  • the maximum value is determined as the transmit power of the DPCCH, where the power candidate value is the power control history value plus the pilot transmit power value and the pilot channel receive code power value of the source cell, and then subtracted The value of the dominant frequency transmit power value of the source cell and the pilot channel received code power value of the target cell.
  • the control unit 320 may be specifically configured to: open the ring of the transmit power of the DPCCH according to the parameter of the target cell on a preset number of time slots after the receiving unit 310 receives the control message. Power Control;
  • the control unit 320 is further configured to: adjust, according to the TPC command word sent by the base station of the active centralized cell of the UE, the transmission of the DPCCH on the time slot after the preset number of time slots. power.
  • the receiving unit 310 may be specifically configured to: when the UE moves from the micro cell to the macro cell, receive a control message sent by the network device, where the control message includes the macro cell. Parameters.
  • FIG. 4 it is a block diagram of another embodiment of the power control apparatus of the present invention:
  • the apparatus includes: a receiving unit 410, a judging unit 420, and a control unit 430.
  • the receiving unit 410 is configured to receive, by the network device, a control message that is sent by the network device, where the control message includes a parameter of the target cell.
  • determining unit 420 configured to determine whether the UE meets an open loop power control condition
  • the control unit 430 is configured to: when the determining result of the determining unit 420 is that the UE meets the open loop power control condition, according to the transmit power of the parameter of the target cell received by the receiving unit 410 to the DPCCH Performing open loop power control, so that the base station of the target cell receives the DPCCH transmitted by the UE.
  • the open loop power control condition may include:
  • the speed estimation value of the UE is higher than a set speed threshold
  • the UE When the UE receives an active set update message that is sent by the network device and adds the target cell to the active set of the UE, the UE is in a downlink synchronization state, and is received within a preset time period. The quality of the DPCCH sent by the source cell is lower than the set quality threshold.
  • the receiving unit 410 may be specifically configured to receive, by the network device, an activation set update message that is sent by the network device to the active set of the UE, or The serving cell of the UE is switched to the serving cell update message of the target cell; or the receiving device sends an active set update message that is sent by the network device to indicate that the UE deletes the source cell from the active set; or, the receiving network device The newly added control message for carrying the parameter of the target cell;
  • the control unit 430 may be specifically configured to: when the receiving unit 410 receives an active set update message that adds the target cell to an active set of the UE, establish, in the UE, the target cell When the radio link is used, performing open loop power control on the transmit power of the DPCCH according to the parameters of the target cell; or, when the receiving unit 410 receives the serving cell update that switches the serving cell of the UE to the target cell And when the UE switches the serving cell to the target cell, performing open loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or, when the receiving unit 410 receives the When the source cell disconnects the active set update message from the active set, when the UE disconnects the wireless link with the source cell, the open loop power control is performed on the transmit power of the DPCCH according to the parameter of the target cell. [147] In another alternative implementation:
  • the parameter of the target cell received by the receiving unit 410 includes at least one of the following parameters: a DPCCH power offset value for accessing the target cell; a DPCCH power boost value of the target cell; Dominant frequency transmit power value;
  • the control unit 430 may include at least one of the following sub-units (not shown in FIG. 4): [150] a first control sub-unit, and parameters for the target cell received by the receiving unit 410 include And obtaining, by the DPCCH power offset value, a difference between the DPCCH power offset value and a pilot channel received code power value of the target cell, and obtaining a saved power control history value of the DPCCH, where the difference is The larger of the power control history values of the DPCCH is determined as the transmit power of the DPCCH;
  • a second control subunit configured to: when the parameter of the target cell received by the receiving unit 410 includes the DPCCH power boost value, obtain a power control history value of the saved DPCCH, and control power of the DPCCH The sum of the historical value and the DPCCH power boost value is determined as the transmit power of the DPCCH;
  • a third control subunit configured to: when the parameter of the target cell received by the receiving unit 410 includes the dominant frequency transmit power value, obtain a power control history value of the saved DPCCH, and according to the dominant frequency Launch a power candidate value calculated by the power value, determining a power control history value of the DPCCH and a larger value of the power candidate value as a transmit power of the DPCCH, where the power candidate value is the power control history Adding the value of the dominant frequency transmit power and the pilot channel received code power value of the source cell, and subtracting the dominant frequency transmit power value of the source cell and the pilot channel received code power value of the target cell. value.
  • the control unit 430 may be specifically configured to: when the determination result of the determining unit 420 is that the open loop power control condition is met, the preset number after the receiving unit 410 receives the control message Performing open-loop power control on the transmit power of the DPCCH according to the parameters of the target cell;
  • the control unit 430 is further configured to: adjust, according to the TPC command word sent by the base station of the active centralized cell of the UE, the transmission of the DPCCH on a time slot after the preset number of time slots. power.
  • the receiving unit 410 may be specifically configured to: when the UE moves from the micro cell to the macro cell, receive a control message sent by the network device, where the control message includes the macro cell.
  • the UE includes: a wireless transceiver 510 and a processor 520.
  • the wireless transceiver 510 is configured to receive, by the network device, a control message that is sent by the network device, where the control message includes a parameter of the target cell, where the network device is the target cell.
  • the control message includes a parameter of the target cell, where the network device is the target cell.
  • a base station of the base station or the source cell the source cell is a serving cell before the cell handover, and the target cell is a serving cell after the cell handover by the UE;
  • the processor 520 Performing open-loop power control on the transmit power of the DPCCH according to the parameter of the target cell, so that the base station of the target cell receives the DPCCH transmitted by the UE.
  • both the wireless transceiver 510 and the processor 520 can be implemented by an integrated circuit process.
  • the wireless transceiver 510 may be specifically configured to receive an active set update message that is sent by the network device to join the target cell to the active set of the UE; or The serving cell of the UE is switched to the serving cell update message of the target cell; or the receiving network device sends the indication to the UE Adding an activation set update message of the source cell to the active set; or receiving a new control message that is sent by the network device to carry the parameter of the target cell;
  • the processor 520 may be specifically configured to: when the wireless transceiver 510 receives an active set update message that is sent by the network device and adds the target cell to an active set of the UE, When the target cell establishes a radio link, performing open-loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or, when the radio transceiver 510 receives the service that is sent by the network device to the UE.
  • the cell handover is the serving cell update message of the target cell, when the serving cell is switched to the target cell, performing open loop power control on the transmit power of the DPCCH according to the parameter of the target cell; or
  • the wireless transceiver 510 receives the active set update message that is sent by the network device to indicate that the UE deletes the source cell from the active set, when disconnecting the wireless link with the source cell, according to the The parameters of the target cell perform open loop power control on the transmit power of the DPCCH.
  • the parameter of the target cell received by the radio transceiver 510 may include at least one of the following parameters: a DPCCH power offset value for accessing the target cell; a DPCCH power boost value of the target cell; The dominant frequency transmit power value of the target cell;
  • the processor 520 may be specifically configured to: when the parameter of the target cell includes the DPCCH power offset value, obtain the DPCCH power offset value and a pilot channel received code power of the target cell. a difference value, and a power control history value of the saved DPCCH, determining a larger value of the difference and the power control history value of the DPCCH as a transmit power of the DPCCH; or, when the target When the parameter of the cell includes the DPCCH power boost value, obtain a power control history value of the saved DPCCH, and determine a sum of the power control history value of the DPCCH and the DPCCH power boost value as a transmit power of the DPCCH; or And obtaining, when the parameter of the target cell includes the dominant frequency transmit power value, obtaining a power control history value of the saved DPCCH, and calculating a power candidate value according to the dominant frequency transmit power value, and performing power control of the DPCCH
  • the historical value and the larger of the power candidate values are determined as the transmit power of the DPCCH, where the
  • the processor 520 is further configured to determine whether the UE meets an open loop power control condition;
  • the processor 520 may be specifically configured to: when the judgment result is that the UE meets the open loop power control condition, perform open loop power control on a transmit power of the DPCCH according to a parameter of the target cell;
  • the open loop power control condition may include:
  • the speed estimation value of the UE is higher than the set speed threshold; or, [173] when the UE receives an activation set that is sent by the network device and adds the target cell to the active set of the UE.
  • the UE is in a downlink synchronization state, and the quality of the DPCCH sent by the source cell received in the preset time period is lower than the set quality threshold.
  • the processor 520 may be specifically configured to: according to a parameter of the target cell, transmit a transmit power of the DPCCH on a preset number of time slots after the wireless transceiver receives the control message. Loop power control
  • the processor 520 is further configured to: adjust, according to the TPC command word sent by the base station of the active set cell of the UE, the transmit of the DPCCH on the time slot after the preset number of time slots. power.
  • the wireless transceiver 510 may be specifically configured to: when the UE moves from the micro cell to the macro cell, receive a control message sent by the network device, where the control message includes parameters of the macro cell, The target cell is the macro cell, and the source cell is the micro cell.
  • the control message including the parameter of the target cell delivered by the network device is received, and the open loop power control of the transmit power of the DPCCH is performed according to the parameter of the target cell, so as to achieve the target.
  • the base station of the cell receives the DPCCH transmitted by the UE.
  • the UE may perform open-loop control on the transmit power of the DPCCH according to the parameters of the target cell, compared with the prior art to adjust the transmit power of the DPCCH according to the TPC command word.
  • the adoption of the open loop power control may enable the target base station to receive the DPCCH transmitted by the UE during the UE mobile process, especially during the high speed mobile operation of the UE, so as to ensure that the UE can locate the target cell before disconnecting from the source cell.
  • the active set is added so that the UE can handover to the target cell.
  • the product may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform various embodiments or implementations of the present invention.
  • a computer device which may be a personal computer, a server, or a network device, etc.

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Abstract

一种功率控制方法、装置及UE,该方法包括:当UE移动过程中,接收网络设备下发的控制消息,控制消息中包含目标小区的参数;根据目标小区的参数对DPCCH的发射功率进行开环功率控制,以使目标小区的基站接收到UE发射的DPCCH。应用本发明实施例,当UE从源小区向目标小区移动过程中,可以按照目标小区的参数对DPCCH的发射功率进行开环控制,因此可以使得目标基站在UE移动过程中,特别是UE高速移动过程中,可以接收到UE发射的DPCCH,以此保证UE在断开与源小区的连接之前,可以将目标小区加入激活集,从而使得UE可以切换到目标小区。

Description

功率控制方法、 装置及 UE
本申请要求于 2013 年 6 月 28 日提交中国专利局、 申请号为
201310268772. 9, 发明名称为 "功率控制方法、 装置及 UE" 的中国专利申请 的优先权, 其全部内容通过引用结合在本申请中。
技术领域
[01] 本发明涉及通信技术领域, 特别涉及功率控制方法、 装置及用户设备 (User Equipment , UE)。 背景技术
[02] 传统的无线接入网络主要指同构网络 (Homogeneous network, HomoNet) , 同构 网络中的基站可以称为宏基站, 宏基站下的小区称为宏小区, 宏基站具有相同的发射 功率和大致相同的覆盖范围, 其覆盖整个网络, 为 UE提供不间断的通信服务。 随着异 构网络 (Heterogeneous Network, HetNet ) 技术的发展, 在宏基站的网络基础上可以 增加了一个或多个微基站, 微基站下的小区称为微小区, 微基站的发射功率和覆盖范 围远小于宏基站。 通常可以将微基站部署在宏基站的热点区域, 用于对宏基站进行负 载分流, 以此提升无线接入网络的吞吐率。
[03] 现有技术中, UE在小区间移动时, 可以采用软切换技术进行小区间切换。 软切换 指 UE从源小区移动到目标小区的过程中, 为了保持 UE与无线网络间的通信不间断, UE在将目标小区加入激活集后, 同时与激活集中的源小区和目标小区进行通信, 当 UE 进入到目标小区的覆盖区域后, UE再断开与源小区的连接。 在上述软切换过程中, UE 需要对激活集中的每个小区下发的传输功率控制(Transmi ssion Power Control , TPC) 命令字进行合并, 并按照合并后的 TPC 命令字调整专用物理控制信道 (Dedicated Physical Control Channel , DPCCH) 的发射功率, 以保证激活集中的所有小区都可以 接收到 UE发射的信号。 [04] 以 HetNet组网架构下为例, 当 UE执行软切换从微小区向宏小区移动时, 初始 UE 距离微基站较近,因此 UE对 DPCCH的发射功率的调整主要受到微基站下发的 TPC命令 字的影响, 但是由于微基站的发射功率较低且覆盖范围较小, 使得 UE根据微基站下发 的 TPC命令字调整后的 DPCCH的发射功率也较小, 从而导致宏基站可能无法接收到 UE 发射的信号; 随着 UE与微基站之间距离的增大, UE可能在断开与微小区的连接时, 还未将宏小区加入激活集, 从而使得 UE无法切换到宏小区, 导致 UE失步。 发明内容
[05] 本发明实施例中提供了功率控制方法、 装置及 UE, 以解决 UE从源小区移动到目 标小区的软切换过程中, 功率控制方式容易导致 UE失步的问题。 [06] 为了解决上述技术问题, 本发明实施例公开了如下技术方案:
[07] 第一方面, 提供一种功率控制方法, 所述方法包括:
[08] 当用户设备 UE移动过程中, 接收网络设备下发的控制消息, 所述控制消息中包 含目标小区的参数,所述网络设备为所述目标小区的基站或源小区的基站,所述源小区为 所述 UE进行小区切换前的服务小区,所述目标小区为所述 UE进行小区切换后的服务小区; [09] 根据所述目标小区的参数对专用物理控制信道 DPCCH的发射功率进行开环功率控 制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
[10] 结合第一方面, 在第一方面的第一种可能的实现方式中, 所述接收网络设备下发 的控制消息包括:
[11] 接收网络设备下发的将所述目标小区加入所述 UE 的激活集的激活集更新消息; 或者,
[12] 接收网络设备下发的将所述 UE 的服务小区切换为所述目标小区的服务小区更新 消息; 或者,
[13] 接收网络设备下发的指示所述 UE将源小区从激活集中删除的激活集更新消息; 或者, [14] 接收网络设备下发的用于携带所述目标小区的参数的新增控制消息。
[15] 结合第一方面的第一种可能的实现方式, 在第一方面的第二种可能的实现方式 中, 所述根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制, 包括:
[16] 当接收到网络设备下发的将所述目标小区加入所述 UE 的激活集的激活集更新消 息时, 所述 UE在与所述目标小区建立无线链路时, 根据所述目标小区的参数对 DPCCH 的发射功率进行开环功率控制; 或者, [17] 当接收到网络设备下发的将所述 UE 的服务小区切换为所述目标小区的服务小区 更新消息时, 所述 UE在将所述服务小区切换为所述目标小区时, 根据所述目标小区的 参数对 DPCCH的发射功率进行开环功率控制; 或者,
[18] 当接收到网络设备下发的指示所述 UE将所述源小区从激活集中删除的激活集更 新消息时, 所述 UE 在断开与所述源小区的无线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制。
[19] 结合第一方面, 或第一方面的第一种可能的实现方式, 或第一方面的第二种可能 的实现方式, 在第一方面的第三种可能的实现方式中, 所述目标小区的参数包括至少 一个下述参数: 接入所述目标小区的 DPCCH功率偏置值; 所述目标小区的 DPCCH功率 提升值; 所述目标小区的主导频发射功率值;
[20] 所述 UE采用任意一种下述方式, 根据所述目标小区的参数对 DPCCH的发射功率 进行开环功率控制:
[21] 当所述目标小区的参数包括所述 DPCCH功率偏置值时, 所述 UE获得所述 DPCCH 功率偏置值与所述目标小区的导频信道接收码功率值的差值, 以及获得保存的 DPCCH 的功率控制历史值, 将所述差值与所述 DPCCH的功率控制历史值中的较大值确定为所 述 DPCCH的发射功率;
[22] 当所述目标小区的参数包括所述 DPCCH功率提升值时,所述 UE获得保存的 DPCCH 的功率控制历史值, 将所述 DPCCH的功率控制历史值与所述 DPCCH功率提升值的和确 定为所述 DPCCH的发射功率; [23] 当所述目标小区的参数包括所述主导频发射功率值时,所述 UE获得保存的 DPCCH 的功率控制历史值, 以及根据所述主导频发射功率值计算的功率候选值,将所述 DPCCH 的功率控制历史值与所述功率候选值中的较大值确定为所述 DPCCH的发射功率,其中, 所述功率候选值为所述功率控制历史值加上所述主导频发射功率值和所述源小区的导 频信道接收码功率值, 再减去所述源小区的主导频发射功率值和目标小区的导频信道 接收码功率值后的值。
[24] 结合第一方面, 或第一方面的第一种可能的实现方式, 或第一方面的第二种可能 的实现方式, 或第一方面的第三种可能的实现方式, 在第一方面的第四种可能的实现 方式中, 所述根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制之前, 所述方法还包括: [25] 所述 UE判断 UE是否满足开环功率控制条件;
[26] 所述根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制包括: 当判 断结果为所述 UE满足所述开环功率控制条件时,根据所述目标小区的参数对 DPCCH的 发射功率进行开环功率控制; [27] 其中, 所述开环功率控制条件包括:
[28] 所述 UE的速度估计值高于设置的速度门限值; 或者,
[29] 当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。 [30] 结合第一方面, 或第一方面的第一种可能的实现方式, 或第一方面的第二种可能 的实现方式, 或第一方面的第三种可能的实现方式, 或第一方面的第四种可能的实现 方式,在第一方面的第五种可能的实现方式中,所述根据所述目标小区的参数对 DPCCH 的发射功率进行开环功率控制包括: 在接收到所述控制消息后的预设数目个时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; [31] 所述方法还包括: 在所述预设数目个时隙后的时隙上, 按照所述 UE 的激活集中 小区的基站下发的传输功率控制 TPC命令字调整所述 DPCCH的发射功率。
[32] 结合第一方面, 或第一方面的第一种可能的实现方式, 或第一方面的第二种可能 的实现方式, 或第一方面的第三种可能的实现方式, 或第一方面的第四种可能的实现 方式, 或第一方面的第五种可能的实现方式, 在第一方面的第六种可能的实现方式中, 所述 UE移动过程包括所述 UE从微小区移动到宏小区的过程;
[33] 所述目标小区具体为所述宏小区, 所述源小区为所述微小区。
[34] 第二方面, 提供一种功率控制装置, 所述装置包括:
[35] 接收单元, 用于当 UE移动过程中, 接收网络设备下发的控制消息, 所述控制消 息中包含目标小区的参数,所述网络设备为所述目标小区的基站或源小区的基站,所述源 小区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区切换后的服 务小区; [36] 控制单元, 用于根据所述接收单元接收到的目标小区的参数对 DPCCH的发射功率 进行开环功率控制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
[37] 结合第二方面, 在第二方面的第一种可能的实现方式中, 所述接收单元, 具体用 于接收网络设备下发的将所述目标小区加入所述 UE 的激活集的激活集更新消息; 或 者,用于接收网络设备下发的将所述 UE的服务小区切换为所述目标小区的服务小区更 新消息; 或者, 用于接收网络设备下发的指示所述 UE将所述源小区从激活集中删除的 激活集更新消息; 或者, 接收网络设备下发的用于携带所述目标小区的参数的新增控 制消息;
[38] 所述控制单元, 具体用于当所述接收单元接收到将所述目标小区加入所述 UE 的 激活集的激活集更新消息时, 在所述 UE与所述目标小区建立无线链路时, 根据所述目 标小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述接收单元接收到 将所述 UE的服务小区切换为所述目标小区的服务小区更新消息时, 在所述 UE将所述 服务小区切换为所述目标小区时, 根据所述目标小区的参数对 DPCCH的发射功率进行 开环功率控制; 或者, 当所述接收单元接收到将所述源小区从激活集中删除的激活集 更新消息时, 在所述 UE断开与所述源小区的无线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制。
[39] 结合第二方面, 或第二方面的第一种可能的实现方式, 在第二方面的第二种可能 的实现方式中, 所述接收单元接收到的目标小区的参数包括至少一个下述参数: 接入 所述目标小区的 DPCCH功率偏置值; 所述目标小区的 DPCCH功率提升值; 所述目标小 区的主导频发射功率值;
[40] 所述控制单元包括至少一个下述子单元:
[41] 第一控制子单元, 用于当所述接收单元接收到的目标小区的参数包括所述 DPCCH 功率偏置值时, 获得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功率值 的差值, 以及获得保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的功率 控制历史值中的较大值确定为所述 DPCCH的发射功率;
[42] 第二控制子单元, 用于当所述接收单元接收到的目标小区的参数包括所述 DPCCH 功率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控制历史 值与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率;
[43] 第三控制子单元, 用于当所述接收单元接收到的目标小区的参数包括所述主导频 发射功率值时, 获得保存的 DPCCH的功率控制历史值, 以及根据所述主导频发射功率 值计算的功率候选值, 将所述 DPCCH的功率控制历史值与所述功率候选值中的较大值 确定为所述 DPCCH的发射功率, 其中, 所述功率候选值为所述功率控制历史值加上所 述主导频发射功率值和所述源小区的导频信道接收码功率值, 再减去所述源小区的主 导频发射功率值和目标小区的导频信道接收码功率值后的值。
[44] 结合第二方面, 或第二方面的第一种可能的实现方式, 或第二方面的第二种可能 的实现方式, 在第二方面的第三种可能的实现方式中, 所述装置还包括:
[45] 判断单元, 用于判断所述 UE是否满足开环功率控制条件;
[46] 所述控制单元, 具体用于当所述判断单元的判断结果为所述 UE满足所述开环功 率控制条件时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
[47] 其中, 所述开环功率控制条件包括:
[48] 所述 UE的速度估计值高于设置的速度门限值; 或者,
[49] 当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。
[50] 结合第二方面, 或第二方面的第一种可能的实现方式, 或第二方面的第二种可能 的实现方式, 或第二方面的第三种可能的实现方式, 在第二方面的第四种可能的实现 方式中, 所述控制单元, 具体用于在所述接收单元接收到所述控制消息后的预设数目 个时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; [51] 所述控制单元, 还用于在所述预设数目个时隙后的时隙上, 按照所述 UE 的激活 集中小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
[52] 结合第二方面, 或第二方面的第一种可能的实现方式, 或第二方面的第二种可能 的实现方式, 或第二方面的第三种可能的实现方式, 或第二方面的第四种可能的实现 方式, 在第二方面的第五种可能的实现方式中, 所述接收单元, 具体用于当 UE从微小 区移动到宏小区的过程中, 接收网络设备下发的控制消息, 所述控制消息中包含所述 宏小区的参数, 其中所述目标小区为所述宏小区, 所述源小区为所述微小区。
[53] 第三方面, 提供一种 UE, 所述 UE包括: 无线收发信机和处理器, 其中, [54] 所述无线收发信机, 用于当 UE移动过程中, 接收网络设备下发的控制消息, 所 述控制消息中包含目标小区的参数, 所述网络设备为所述目标小区的基站或源小区的基 站, 所述源小区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区 切换后的服务小区; [55] 所述处理器, 用于根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控 制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
[56] 结合第三方面, 在第三方面的第一种可能的实现方式中, 所述无线收发信机, 具 体用于接收网络设备下发的将所述目标小区加入所述 UE的激活集的激活集更新消息; 或者,接收网络设备下发的将所述 UE的服务小区切换为所述目标小区的服务小区更新 消息; 或者, 接收网络设备下发的指示所述 UE将所述源小区从激活集中删除的激活集 更新消息; 或者, 接收网络设备下发的用于携带所述目标小区的参数的新增控制消息;
[57] 所述处理器, 具体用于当所述无线收发信机接收到网络设备下发的将所述目标小 区加入所述 UE的激活集的激活集更新消息时, 在与所述目标小区建立无线链路时, 根 据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述无线收 发信机接收到网络设备下发的将所述 UE 的服务小区切换为所述目标小区的服务小区 更新消息时, 在将所述服务小区切换为所述目标小区时, 根据所述目标小区的参数对 DPCCH 的发射功率进行开环功率控制; 或者, 当所述无线收发信机接收到网络设备下 发的指示所述 UE将所述源小区从激活集中删除的激活集更新消息时,在断开与所述源 小区的无线链路时,根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制。 [58] 结合第三方面, 或第三方面的第一种可能的实现方式, 在第三方面的第二种可能 的实现方式中, 所述无线收发信机接收到的目标小区的参数包括至少一个下述参数: 接入所述目标小区的 DPCCH功率偏置值; 所述目标小区的 DPCCH功率提升值; 所述目 标小区的主导频发射功率值;
[59] 所述处理器, 具体用于当所述目标小区的参数包括所述 DPCCH功率偏置值时, 获 得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功率值的差值, 以及获得 保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的功率控制历史值中的较 大值确定为所述 DPCCH的发射功率; 或者, 当所述目标小区的参数包括所述 DPCCH功 率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控制历史值 与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率; 或者, 当所述目标小区 的参数包括所述主导频发射功率值时, 获得保存的 DPCCH的功率控制历史值, 以及根 据所述主导频发射功率值计算的功率候选值, 将所述 DPCCH的功率控制历史值与所述 功率候选值中的较大值确定为所述 DPCCH的发射功率, 其中, 所述功率候选值为所述 功率控制历史值加上所述主导频发射功率值和所述源小区的导频信道接收码功率值, 再减去所述源小区的主导频发射功率值和目标小区的导频信道接收码功率值后的值。 [60] 结合第三方面, 或第三方面的第一种可能的实现方式, 或第三方面的第二种可能 的实现方式, 在第三方面的第三种可能的实现方式中, 所述处理器, 还用于判断所述 UE是否满足开环功率控制条件;
[61] 所述处理器, 具体用于当判断结果为所述 UE满足所述开环功率控制条件时, 根 据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; [62] 其中, 所述开环功率控制条件包括:
[63] 所述 UE的速度估计值高于设置的速度门限值; 或者,
[64] 当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。 [65] 结合第三方面, 或第三方面的第一种可能的实现方式, 或第三方面的第二种可能 的实现方式, 或第三方面的第三种可能的实现方式, 在第三方面的第四种可能的实现 方式中, 所述处理器, 具体用于在所述无线收发信机接收到所述控制消息后的预设数 目个时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
[66] 所述处理器, 还用于在所述预设数目个时隙后的时隙上, 按照所述 UE 的激活集 中小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
[67] 结合第三方面, 或第三方面的第一种可能的实现方式, 或第三方面的第二种可能 的实现方式, 或第三方面的第三种可能的实现方式, 或第三方面的第四种可能的实现 方式, 在第三方面的第五种可能的实现方式中, 所述无线收发信机, 具体用于当 UE从 微小区移动到宏小区的过程中, 接收网络设备下发的控制消息, 所述控制消息中包含 所述宏小区的参数, 其中所述目标小区为所述宏小区, 所述源小区为所述微小区。
[68] 本发明实施例中, 当 UE移动过程中, 接收网络设备下发的包含目标小区的参数 的控制消息, 根据该目标小区的参数对 DPCCH的发射功率进行开环功率控制, 以使目 标小区的基站接收到 UE发射的 DPCCH。 应用本发明实施例, 当 UE从源小区向目标小 区移动过程中, 可以按照目标小区的参数对 DPCCH的发射功率进行开环控制, 与现有 技术按照 TPC命令字调整 DPCCH的发射功率相比, 由于采用开环功控可以使得目标基 站在 UE移动过程中, 特别是 UE高速移动过程中, 可以接收到 UE发射的 DPCCH, 以此 保证 UE在断开与源小区的连接之前, 可以将目标小区加入激活集, 从而使得 UE可以 切换到目标小区。 附图说明
[69] 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施例或现 有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 对于本领域普通技术人 员而言, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。 [70] 图 1为本发明功率控制方法的一个实施例框图;
[71] 图 2为本发明功率控制方法的另一个实施例框图;
[72] 图 3为本发明功率控制装置的一个实施例框图;
[73] 图 4为本发明功率控制装置的另一个实施例框图;
[74] 图 5为本发明 UE的实施例框图。 具体实施方式
[75] 为了使本技术领域的人员更好地理解本发明实施例中的技术方案, 并使本发明实 施例的上述目的、 特征和优点能够更加明显易懂, 下面结合附图对本发明实施例中技 术方案作进一步详细的说明。
[76] 参见图 1, 为本发明功率控制方法的一个实施例流程图: [77] 步骤 101 : 当 UE移动过程中, 接收网络设备下发的控制消息, 该控制消息中包含 目标小区的参数。
[78] 在无线通信网络中, 当 UE执行软切换从源小区向目标小区移动时, 目标小区的 导频信号质量逐渐变好, 当目标小区的导频信号质量超过预设的第一质量门限时, UE 将目标小区的导频信号质量上报到网络设备, 上述过程为 la 事件, 当网络设备根据 UE上报的导频信号质量允许 UE将目标小区加入激活集时, 网络设备向 UE下发激活集 更新消息, UE根据激活集更新消息将目标小区加入激活集, 此时 UE与源小区和目标 小区同时通信; 当 UE继续向目标小区移动, 并在目标小区的导频信号质量超过源小区 的导频信号质量时, UE 将目标小区的导频信号质量发送给网络设备, 上述过程为 Id 事件, 当网络设备根据 UE上报的导频信号质量向 UE下发服务小区更新消息时, UE将 服务小区从源小区切换到目标小区; 当激活集中的源小区的导频信号质量低于预设的 第二质量门限时, UE将源小区的导频信号质量上报到网络设备, 上述过程为 lb事件, 当网络设备根据 UE上报的导频信号质量确定 UE离开源小区时,网络设备向 UE下发激 活集更新消息, UE根据激活集更新消息将源小区从激活集中删除, 并断开与源小区的 连接。 其中, 激活集指与 UE之间存在无线链路连接的小区的集合。
[79] 本实施例可以应用于 HetNet组网架构, HetNet作为异构网络, 可以由不同大小 和不同类型的小区构成, 这些小区可以包括: 宏小区 (macro ce l l ) 和微小区 (micro cel l ) ,, 需要说明的是, 微小区仅是为了区别于宏小区的广义描述, 即微小区是覆盖范 围小于宏小区的一类小区,还可以具体包括微微小区( p i co ce 11 )和毫微微小区( femto cel l ) 等, 对此本发明实施例不进行限制。
[80] 在 HetNet组网架构下, 当 UE执行软切换时, 可以将微小区作为源小区, 宏小区 作为目标小区, UE在从微小区向宏小区移动的过程中, 可能在上述 la事件, 或 Id事 件, 或 lb事件发生时, 执行本发明实施例的开环功率控制过程。 其中, UE可以在 la 事件发生时, 接收网络设备下发的将宏小区加入所述 UE的激活集的激活集更新消息; 或者, UE也可以在 I d事件发生时, 接收网络设备下发的将所述 UE的服务小区切换为 所述宏小区的服务小区更新消息; 或者, UE也可以在 lb事件发生时, 接收网络设备 下发的指示所述 UE将所述微小区从激活集中删除的激活集更新消息。本实施例中, 网 络设备可以在下发上述任意一个消息时, 在该消息中携带宏小区的参数, 或者, 网络 设备也可以在下发上述任意一个消息时,同时向 UE下发携带了宏小区的参数的新增的 控制消息; 也就是说, 网络设备在向 UE下发宏小区的参数时, 可以复用现有技术中的 消息, 也可以新增消息。本实施例中, 网络设备可以为目标小区的基站或源小区的基站, 所述源小区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区切换 后的服务小区,其中, 网络设备向 UE下发的控制消息由无线网络控制器(Radio Network Control ler , RNC ) 下发给该网络设备。
[81] 其中, 控制消息中包含的目标小区的参数可以包括至少一个下述参数: 接入目标 小区的 DPCCH功率偏置值; 目标小区的 DPCCH功率提升值; 目标小区的主导频发射功 率值。 其中, 接入目标小区的 DPCCH功率偏置值为当前干扰情况下目标小区的基站解 调 DPCCH所需的最低功率值相对于目标小区的主导频发射功率的偏置; 目标小区的 DPCCH功率提升值为目标小区本次 DPCCH的发射功率相对于前一次 DPCCH的发射功率 需要提升的功率值; 目标小区的主导频发射功率值为目标小区的基站在整个目标小区 内广播主公共导频信道 ( Primary Common Pi lot Channel , PCPICH) 时的发射功率, 每个小区仅有一个 PCPICH。 [82] 步骤 102 : 根据目标小区的参数对 DPCCH的发射功率进行开环功率控制, 以使目 标小区的基站接收到 UE发射的 DPCCH。
[83] 仍然以在 HetNet组网架构下, UE从作为源小区的微小区向作为目标小区的宏小 区移动为例, 其中, 当步骤 101中 UE接收到网络设备下发的将宏小区加入 UE的激活 集的激活集更新消息时, UE在与宏小区建立无线链路时, 根据宏小区的参数对 DPCCH 的发射功率进行开环功率控制; 当步骤 101中 UE接收到网络设备下发的将 UE的服务 小区切换为宏小区的服务小区更新消息时, UE在将服务小区切换为宏小区时, 根据宏 小区的参数对 DPCCH的发射功率进行开环功率控制;当步骤 101中 UE接收到网络设备 下发的指示 UE将微小区从激活集中删除的激活集更新消息时, UE在断开与微小区的 无线链路时, 根据宏小区的参数对 DPCCH的发射功率进行开环功率控制。 [84] 具体的, 结合步骤 101中接收到的控制消息中包含的宏小区的参数的不同, UE可 以按照如下任意一种方式, 根据所述宏小区的参数对 DPCCH的发射功率进行开环功率 控制:
[85] 当步骤 101中 UE接收到的宏小区的参数包括接入宏小区的 DPCCH功率偏置值时, UE可以获得 DPCCH功率偏置值与宏小区的导频信道接收码功率值的差值, 以及获得保 存的 DPCCH的功率控制历史值, 将该差值与 DPCCH的功率控制历史值中的较大值确定 为 DPCCH的发射功率;当步骤 101中 UE接收到的宏小区的参数包括宏小区的 DPCCH功 率提升值时, UE可以获得保存的 DPCCH的功率控制历史值, 将 DPCCH的功率控制历史 值与 DPCCH功率提升值的和确定为 DPCCH的发射功率;当步骤 101中 UE接收到宏小区 的参数包括宏小区的主导频发射功率值时, UE可以获得保存的 DPCCH的功率控制历史 值, 以及根据所述宏小区的主导频发射功率值计算的功率候选值, 将 DPCCH的功率控 制历史值与功率候选值中的较大值确定为 DPCCH的发射功率, 其中, 功率候选值为功 率控制历史值加上宏小区的主导频发射功率值和微小区的导频信道接收码功率值, 再 减去微小区的主导频发射功率值和宏小区的导频信道接收码功率值后的值。
[86] 由上述实施例可见, 当 UE从源小区向目标小区移动过程中, 可以按照目标小区 的参数对 DPCCH的发射功率进行开环控制, 与现有技术按照 TPC命令字调整 DPCCH的 发射功率相比, 由于采用开环功控可以使得宏基站在 UE移动过程中, 特别是 UE高速 移动过程中, 可以接收到 UE发射的 DPCCH, 以此保证 UE在断开与源小区的连接之前, 可以将目标小区加入激活集, 从而使得 UE可以切换到目标小区。
[87] 参见图 2, 为本发明功率控制方法的另一个实施例流程图, 该实施例基于 HetNet 组网架构, 详细描述了 UE从微小区向宏小区移动过程中的功率控制过程:
[88] 步骤 201 : UE从微小区向宏小区移动。
[89] 本实施例基于 HetNet组网架构, HetNet作为异构网络, 可以由不同大小和不同 类型的小区构成, 这些小区可以包括: 宏小区 (macro ce l l )和微小区 (mi cro cel l )。 需要说明的是, 微小区仅是为了区别于宏小区的广义描述, 即微小区是覆盖范围远小 于宏小区的一类小区, 还可以具体包括微微小区 (p ico ce l l ) 和毫微微小区 (femto cel l ) 等, 对此本发明实施例不进行限制。
[90] 本实施例中, 当 UE执行软切换时, 微小区作为源小区, 宏小区作为目标小区, UE从微小区向宏小区移动。
[91] 步骤 202 : UE判断是否满足开环功率控制条件, 若是, 则执行步骤 203; 否则, 执行 步骤 206。
[92] 本实施例在执行开环功率控制之前, 可以由 UE先判断是否满足开环功率控制条件, 如果满足开环功率控制条件, 可以执行本发明实施例的开环功率控制, 如果不满足开环功 率控制条件, 则可以按照现有技术通过 TPC命令字进行功率控制。
[93] 其中, 开环功率控制条件可以为 UE的速度估计值高于设置的速度门限值, 即 UE判断 UE的速度估计值是否高于设置的速度门限值。 UE可以采用现有速度估计方式,按照预设周 期估计每一段时间内的速度, 获得速度估计值, 如果 UE从微小区向宏小区移动过程中,速 度估计值高于设置的速度门限值, 则说明 UE当前处于高速移动中, 失步风险较大, 因此可 以采用本发明实施例的开环功控方案。
[94] 其中,开环功控条件也可以为当所述 UE接收到网络设备下发的将宏小区加入 UE的激 活集的激活集更新消息, 即当 UE在软切换过程中的 la事件发生后, 接收到网络设备发送 的将宏小区加入激活集的激活集更新消息时, UE处于下行同步状态, 且在预设时间段内 接收到的微小区发送的 DPCCH的质量低于设置的质量门限值, 此时说明微小区的链路质量 较差, 而宏小区还未加入激活集, UE失步风险较大, 因此可以采用本发明实施例的开环功 控方案。
[95] 步骤 203: UE接收网络设备下发的控制消息, 控制消息中包含宏小区的参数。
[96] 当 UE满足开环功率控制条件时, UE可以采用本发明实施例的开环功控方案。 本实施 例中,网络设备可以具体为 RNC, RNC下发的控制消息可以具体为软切换过程中在 la事件, 或 Id事件, 或 lb事件发生后, RNC向 UE下发的现有控制消息, 或者 RNC向 UE下发 的新增控制消息。
[97] 其中, UE可以在 la事件发生时, 接收网络设备下发的将宏小区加入所述 UE的激 活集的激活集更新消息; 或者, UE也可以在 Id事件发生时, 接收网络设备下发的将 所述 UE的服务小区切换为所述宏小区的服务小区更新消息; 或者, UE也可以在 lb事 件发生时,接收网络设备下发的指示所述 UE将所述微小区从激活集中删除的激活集更 新消息。 本实施例中, 网络设备可以在下发上述任意一个消息时, 在该消息中携带宏 小区的参数, 或者, 网络设备也可以在下发上述任意一个消息时, 同时向 UE下发携带 了宏小区的参数的新增的控制消息。
[98] 其中, 控制消息中包含的宏小区的参数可以包括至少一个下述参数: 接入宏小区 的 DPCCH 功率偏置值 (DPCCH_Power_offset_Macro ) ; 宏小区的 DPCCH 功率提升值 ( DPCCH_Power_Boost_Macro ) ; 宏 小 区 的 主 导 频 发 射 功 率 值 ( Primary CPICH TX Power Macro )。
[99] 步骤 204: UE判断当前是否在接收控制消息后的预设数目个时隙内, 若是, 则执 行步骤 205; 否则, 执行步骤 206。 [100]本实施例中, UE可以无需在整个软切换过程中都执行本发明实施例的开环功控方 案, 执行开环功控方案的目的在于使 UE在从微小区向宏小区切换过程中, UE不会失 步, 因此 UE 可以在接收到控制消息后的预设数目个时隙内执行开环功控方案, 保证 UE不会失步即可, 预设数目个时隙的后续时隙可以仍然兼容现有通过 TPC命令字进行 功率控制的方案。 [101]其中, 当步骤 203中 UE接收到网络设备下发的将宏小区加入 UE的激活集的激活 集更新消息时,该预设数目个时隙可以具体为 UE与宏小区建立无线链路(Radio Link, RL) 的第一个时隙; 当步骤 203中 UE接收到网络设备下发的将 UE的服务小区切换为 宏小区的服务小区更新消息时,该预设数目个时隙可以具体为 UE将服务小区切换为宏 小区的第一个时隙; 当步骤 203中 UE接收到网络设备下发的指示 UE将微小区从激活 集中删除的激活集更新消息时,该预设数目个时隙可以具体为 UE在断开与微小区的无 线链路的第一个时隙。 需要说明的是, 在实际应用中, 预设数目个时隙可以不局限于 第一个时隙, 对此本发明实施例不进行限制。
[102]步骤 205: UE根据宏小区的参数对 DPCCH的发射功率进行开环功率控制, 返回步骤 204。
[103]具体的, 结合步骤 203中接收到的控制消息中包含的宏小区的参数的不同, UE可 以按照如下任意一种方式, 根据所述宏小区的参数对 DPCCH的发射功率进行开环功率 控制:
[104]第一种方式: 当步骤 203中 UE接收到的宏小区的参数包括接入宏小区的 DPCCH 功率偏置值 ( DPCCH_Power_of f set_Macro ) 时, UE 可以获得 DPCCH 功率偏置值 ( DPCCH_Power_offset_Macro ) 与 宏 小 区 的 导 频 信 道 接 收 码 功 率 值 ( CPICH_RSCP_Macro ) 的差值, 以及获得保存的 DPCCH 的功率控制历史值 ( DPCCH_Current_Power ) , 将该差值与 DPCCH 的功率控制历史值中的较大值确定为
DPCCH的发射功率, 即开环功控可以采用如下公式: [105] DPCCH_Init ial_power=max (DPCCH Current Power, DPCCH Power of f set Macro- CPICH_RSCP_Macro);
[106]上述公式中, DPCCH_Ini tial_power表示当前时隙的 DPCCH的发射功率值; 接入 宏小区的 DPCCH功率偏置值 (DPCCH_Power_offset_Macro ) 表示当前干扰情况下宏小 区的基站解调 DPCCH的最低接收功率相对于宏小区主导频发射功率的偏置; 宏小区的 导频信道接收码功率值 (CPICH_RSCP_Macro ) 可以由 UE测量得到; DPCCH的功率控制 历史值 (DPCCH_Current_POWer ) 表示 UE保存的按照现有技术通过 TPC命令字得到的 当前时隙的 DPCCH的发射功率值。
[107]第二种方式: 当步骤 203中 UE接收到的宏小区的参数包括宏小区的 DPCCH功率 提升值 (DPCCH_Power_Boost_Macro ) 时, UE可以获得保存的 DPCCH的功率控制历史 值 ( DPCCH_Current_Power ) , 将 DPCCH的功率控制历史值 ( DPCCH_Current_Power )与 DPCCH功率提升值 (DPCCH_Power_Boost_Macro ) 的和确定为 DPCCH的发射功率, 即开 环功控可以采用如下公式:
[108] DPCCH_Init ial_power=DPCCH_Current_Power+DPCCH_Power_Boost_Macro ; [109]上述公式中, DPCCH_Initial_power表示当前时隙的 DPCCH的发射功率值; DPCCH 的功率控制历史值 (DPCCH_Current_POWer) 表示 UE保存的按照现有技术通过 TPC命 令字得到的当前时隙的 DPCCH 的发射功率值; 宏小区的 DPCCH 功率提升值 ( DPCCH_Power_Boost_Macro ) 表示 UE与宏小区建立连接时, 宏小区下一次 DPCCH的 发射功率相对于本次 DPCCH的发射功率需要提升的功率值。
[110]第三种方式: 当步骤 203中 UE接收到宏小区的参数包括宏小区的主导频发射功 率值 (Primary_CPICH_TX_power_Macro) 时, UE可以获得保存的 DPCCH的功率控制历 史值 ( DPCCH_Current_POWer ), 以及根据所述宏小区的主导频发射功率值 ( Primary_CPICH_TX_power_Macro ) 计算的功率候选值, 将 DPCCH的功率控制历史值 ( DPCCH_Current_Power) 与功率候选值中的较大值确定为 DPCCH的发射功率, 其中, 功率候选值为功率控制历史值(DPCCH_Current_POWer)加上宏小区的主导频发射功率 值 ( Primary_CPICH_TX_power_Macro ) 和微小区的导频信道接收码功率值 ( CPICH_RSCP_LPN ) , 再 减 去 微 小 区 的 主 导 频 发 射 功 率 值 ( Pr imary_CP I CH_TX_power_LPN ) 和宏 小 区 的 导 频信道接 收码功 率值 ( CPICH_RSCP_Macro) 后的值。
[lll] DPCCH_Initial_power=max (DPCCH Current Power, DPCCH_Current_Power+ Primary_CPICH_TX_power_Macro-Primary_CPICH_TX_power_LPN-CPICH_RSCP_Macro+ CPICH_RSCP_LPN);
[112]上述公式中, DPCCH_Initial_power表示当前时隙的 DPCCH的发射功率值; DPCCH 的功率控制历史值 (DPCCH_Current_Power) 表示 UE保存的按照现有技术通过 TPC命 令字得到的当前时隙的 DPCCH 的发射功率值; 微小区的导频信道接收码功率值
( CPICH_RSCP_LPN)为 UE测量得到的微小区的导频信道接收码功率; 微小区的主导频 发射功率值 (Primary_CPICH_TX_pOWer_LPN ) 和宏小区的导频信道接收码功率值
( CPICH_RSCP_Macro) 均可以由 UE按照现有技术测量得到。 [113]步骤 206: UE按照基站下发的 TPC命令字调整 DPCCH的发射功率,结束当前流程。
[114]当步骤 202中的判断结果为 UE不满足开环功率控制条件时, UE可以按照现有技 术进行功率控制,即按照 UE激活集中的小区的基站下发的 TPC命令字调整 DPCCH的发 射功率。
[115]当步骤 204 中的判断结果为当前时隙不在接收到控制消息后的预设数目个时隙 内,即当前时隙为预设数目个时隙后的时隙,则 UE也可以按照现有技术进行功率控制。 其中, 当步骤 203中 UE接收到网络设备下发的将宏小区加入 UE的激活集的激活集更 新消息时, 此时激活集中包括微小区和宏小区, 因此 UE 按照微基站和宏基站下发的 TPC命令字调整 DPCCH的发射功率; 当步骤 203中 UE接收到网络设备下发的将 UE的 服务小区切换为宏小区的服务小区更新消息时, 此时激活集中仍然包含微小区和宏小 区, 因此 UE仍然按照微基站和宏基站下发的 TPC命令字调整 DPCCH的发射功率; 当步 骤 203中 UE接收到网络设备下发的指示 UE将微小区从激活集中删除的激活集更新消 息时, 此时激活集中仅包含宏小区, 因此 UE按照宏基站下发的 TPC命令字调整 DPCCH 的发射功率。 [116]另外, 本发明实施例中, 当 UE执行开环功控方案后, 会瞬时大幅提升 DPCCH的 发射功率, 后续需要经过一段时间的闭环功控调整, 及通过 TPC命令字调整 DPCCH的 发射功率, UE的上行功控环路才会收敛, 因此网络设备, 如 RNC在对 DPCCH的目标信 号干扰比 (Target Si gnal to Interference Ratio , SIR_Taget ) 进行调整时, 可以 不考虑上述时间段内的数据。 [117]由上述实施例可见, 该实施例可以应用在 HetNet组网架构下, 当 UE从微小区向 宏小区移动过程中, 可以按照宏小区的参数对 DPCCH的发射功率进行开环控制, 与现 有技术按照 TPC命令字调整 DPCCH的发射功率相比, 由于采用开环功控可以使得宏基 站在 UE移动过程中, 特别是 UE高速移动过程中, 可以接收到 UE发射的 DPCCH, 以此 保证 UE在断开与微小区的连接之前, 可以将宏小区加入激活集, 从而使得 UE可以切 换到宏小区。
[118]与本发明功率控制方法的实施例相对应, 本发明还提供了功率控制装置和 UE 的 实施例。
[119]参见图 3, 为本发明功率控制装置的一个实施例框图:
[120]该装置包括: 接收单元 310和控制单元 320。 [121]其中, 接收单元 310, 用于当 UE移动过程中, 接收网络设备下发的控制消息, 所 述控制消息中包含目标小区的参数, 所述网络设备为所述目标小区的基站或源小区的基 站, 所述源小区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区 切换后的服务小区;
[122]控制单元 320, 用于根据所述接收单元 310接收到的目标小区的参数对 DPCCH的 发射功率进行开环功率控制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
[123]在一个可选的实现方式中:
[124]所述接收单元 310, 可以具体用于接收网络设备下发的将所述目标小区加入所述 UE的激活集的激活集更新消息; 或者, 用于接收网络设备下发的将所述 UE的服务小 区切换为所述目标小区的服务小区更新消息; 或者, 用于接收网络设备下发的指示所 述 UE将所述源小区从激活集中删除的激活集更新消息; 或者, 接收网络设备下发的用 于携带所述目标小区的参数的新增控制消息;
[125]所述控制单元 320, 可以具体用于当所述接收单元 310接收到将所述目标小区加 入所述 UE的激活集的激活集更新消息时,在所述 UE与所述目标小区建立无线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述接收 单元 310接收到将所述 UE的服务小区切换为所述目标小区的服务小区更新消息时,在 所述 UE将所述服务小区切换为所述目标小区时, 根据所述目标小区的参数对 DPCCH的 发射功率进行开环功率控制; 或者, 当所述接收单元 310接收到将所述源小区从激活 集中删除的激活集更新消息时, 在所述 UE断开与所述源小区的无线链路时, 根据所述 目标小区的参数对 DPCCH的发射功率进行开环功率控制。
[126]在另一个可选的实现方式中:
[127]所述接收单元 310接收到的目标小区的参数包括至少一个下述参数: 接入所述目 标小区的 DPCCH功率偏置值; 所述目标小区的 DPCCH功率提升值; 所述目标小区的主 导频发射功率值; [128]所述控制单元 320可以包括至少一个下述子单元 (图 3中未示出):
[129]第一控制子单元, 用于当所述接收单元 310 接收到的目标小区的参数包括所述 DPCCH功率偏置值时,获得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功 率值的差值, 以及获得保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的 功率控制历史值中的较大值确定为所述 DPCCH的发射功率; [130]第二控制子单元, 用于当所述接收单元 310 接收到的目标小区的参数包括所述 DPCCH功率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控 制历史值与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率;
[131]第三控制子单元, 用于当所述接收单元 310接收到的目标小区的参数包括所述主 导频发射功率值时, 获得保存的 DPCCH的功率控制历史值, 以及根据所述主导频发射 功率值计算的功率候选值, 将所述 DPCCH的功率控制历史值与所述功率候选值中的较 大值确定为所述 DPCCH的发射功率, 其中, 所述功率候选值为所述功率控制历史值加 上所述主导频发射功率值和所述源小区的导频信道接收码功率值, 再减去所述源小区 的主导频发射功率值和目标小区的导频信道接收码功率值后的值。
[132]在另一个可选的实现方式中:
[133]所述控制单元 320, 可以具体用于在所述接收单元 310接收到所述控制消息后的 预设数目个时隙上,根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
[134]所述控制单元 320, 还可以用于在所述预设数目个时隙后的时隙上, 按照所述 UE 的激活集中小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
[135]上述实施例中, 所述接收单元 310, 可以具体用于当 UE从微小区移动到宏小区的 过程中, 接收网络设备下发的控制消息, 所述控制消息中包含所述宏小区的参数。
[136]参见图 4, 为本发明功率控制装置的另一个实施例框图:
[137]该装置包括: 接收单元 410、 判断单元 420和控制单元 430。
[138]其中, 接收单元 410, 用于当 UE移动过程中, 接收网络设备下发的控制消息, 所 述控制消息中包含目标小区的参数;
[139]判断单元 420, 用于判断所述 UE是否满足开环功率控制条件;
[140]控制单元 430,用于当所述判断单元 420的判断结果为所述 UE满足所述开环功率 控制条件时, 根据所述接收单元 410接收到的目标小区的参数对 DPCCH的发射功率进 行开环功率控制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
[141]其中, 所述开环功率控制条件可以包括:
[142]所述 UE的速度估计值高于设置的速度门限值; 或者,
[143]当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。 [144]在一个可选的实现方式中:
[145]所述接收单元 410, 可以具体用于接收网络设备下发的将所述目标小区加入所述 UE的激活集的激活集更新消息; 或者, 用于接收网络设备下发的将所述 UE的服务小 区切换为所述目标小区的服务小区更新消息; 或者, 用于接收网络设备下发的指示所 述 UE将所述源小区从激活集中删除的激活集更新消息; 或者, 接收网络设备下发的用 于携带所述目标小区的参数的新增控制消息;
[146]所述控制单元 430, 可以具体用于当所述接收单元 410接收到将所述目标小区加 入所述 UE的激活集的激活集更新消息时,在所述 UE与所述目标小区建立无线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述接收 单元 410接收到将所述 UE的服务小区切换为所述目标小区的服务小区更新消息时,在 所述 UE将所述服务小区切换为所述目标小区时, 根据所述目标小区的参数对 DPCCH的 发射功率进行开环功率控制; 或者, 当所述接收单元 410接收到将所述源小区从激活 集中删除的激活集更新消息时, 在所述 UE断开与所述源小区的无线链路时, 根据所述 目标小区的参数对 DPCCH的发射功率进行开环功率控制。 [147]在另一个可选的实现方式中:
[148]所述接收单元 410接收到的目标小区的参数包括至少一个下述参数: 接入所述目 标小区的 DPCCH功率偏置值; 所述目标小区的 DPCCH功率提升值; 所述目标小区的主 导频发射功率值;
[149]所述控制单元 430可以包括至少一个下述子单元 (图 4中未示出): [150]第一控制子单元, 用于当所述接收单元 410 接收到的目标小区的参数包括所述 DPCCH功率偏置值时,获得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功 率值的差值, 以及获得保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的 功率控制历史值中的较大值确定为所述 DPCCH的发射功率;
[151]第二控制子单元, 用于当所述接收单元 410 接收到的目标小区的参数包括所述 DPCCH功率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控 制历史值与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率;
[152]第三控制子单元, 用于当所述接收单元 410接收到的目标小区的参数包括所述主 导频发射功率值时, 获得保存的 DPCCH的功率控制历史值, 以及根据所述主导频发射 功率值计算的功率候选值, 将所述 DPCCH的功率控制历史值与所述功率候选值中的较 大值确定为所述 DPCCH的发射功率, 其中, 所述功率候选值为所述功率控制历史值加 上所述主导频发射功率值和所述源小区的导频信道接收码功率值, 再减去所述源小区 的主导频发射功率值和目标小区的导频信道接收码功率值后的值。 [153]在另一个可选的实现方式中:
[154]所述控制单元 430, 可以具体用于当所述判断单元 420的判断结果为满足所述开 环功率控制条件时,在所述接收单元 410接收到所述控制消息后的预设数目个时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
[155]所述控制单元 430, 还可以用于在所述预设数目个时隙后的时隙上, 按照所述 UE 的激活集中小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
[156]上述实施例中, 所述接收单元 410, 可以具体用于当 UE从微小区移动到宏小区的 过程中, 接收网络设备下发的控制消息, 所述控制消息中包含所述宏小区的参数, 其 中所述目标小区为所述宏小区, 所述源小区为所述微小区。
[157]参见图 5, 为本发明 UE的实施例框图: [158]该 UE包括: 无线收发信机 510和处理器 520。
[159]其中, 所述无线收发信机 510, 用于当 UE移动过程中, 接收网络设备下发的控制 消息, 所述控制消息中包含目标小区的参数, 所述网络设备为所述目标小区的基站或源 小区的基站, 所述源小区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE 进行小区切换后的服务小区; [160]所述处理器 520, 用于根据所述目标小区的参数对 DPCCH的发射功率进行开环功 率控制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
[161]其中, 无线收发信机 510和处理器 520均可以通过集成电路工艺实现。
[162]在一个可选的实现方式中:
[163]所述无线收发信机 510, 可以具体用于接收网络设备下发的将所述目标小区加入 所述 UE的激活集的激活集更新消息; 或者, 接收网络设备下发的将所述 UE的服务小 区切换为所述目标小区的服务小区更新消息; 或者, 接收网络设备下发的指示所述 UE 将所述源小区从激活集中删除的激活集更新消息; 或者, 接收网络设备下发的用于携 带所述目标小区的参数的新增控制消息;
[164]所述处理器 520, 可以具体用于当所述无线收发信机 510接收到网络设备下发的 将所述目标小区加入所述 UE的激活集的激活集更新消息时, 在与所述目标小区建立无 线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述无线收发信机 510接收到网络设备下发的将所述 UE的服务小区切换为所述目标 小区的服务小区更新消息时, 在将所述服务小区切换为所述目标小区时, 根据所述目 标小区的参数对 DPCCH的发射功率进行开环功率控制;或者,当所述无线收发信机 510 接收到网络设备下发的指示所述 UE 将所述源小区从激活集中删除的激活集更新消息 时, 在断开与所述源小区的无线链路时, 根据所述目标小区的参数对 DPCCH的发射功 率进行开环功率控制。
[165]在另一个可选的实现方式中:
[166]所述无线收发信机 510接收到的目标小区的参数可以包括至少一个下述参数: 接 入所述目标小区的 DPCCH功率偏置值; 所述目标小区的 DPCCH功率提升值; 所述目标 小区的主导频发射功率值;
[167]所述处理器 520, 可以具体用于当所述目标小区的参数包括所述 DPCCH功率偏置 值时, 获得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功率值的差值, 以及获得保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的功率控制历史 值中的较大值确定为所述 DPCCH的发射功率; 或者, 当所述目标小区的参数包括所述 DPCCH功率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控 制历史值与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率; 或者, 当所述 目标小区的参数包括所述主导频发射功率值时,获得保存的 DPCCH的功率控制历史值, 以及根据所述主导频发射功率值计算的功率候选值, 将所述 DPCCH的功率控制历史值 与所述功率候选值中的较大值确定为所述 DPCCH的发射功率, 其中, 所述功率候选值 为所述功率控制历史值加上所述主导频发射功率值和所述源小区的导频信道接收码功 率值, 再减去所述源小区的主导频发射功率值和目标小区的导频信道接收码功率值后 的值。
[168]在另一个可选的实现方式中:
[169]所述处理器 520, 还可以用于判断所述 UE是否满足开环功率控制条件; [170]所述处理器 520,可以具体用于当判断结果为所述 UE满足所述开环功率控制条件 时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
[171]其中, 所述开环功率控制条件可以包括:
[172]所述 UE的速度估计值高于设置的速度门限值; 或者, [173]当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。
[174]在另一个可选的实现方式中:
[175]所述处理器 520, 可以具体用于在所述无线收发信机接收到所述控制消息后的预 设数目个时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
[176]所述处理器 520, 还可以用于在所述预设数目个时隙后的时隙上, 按照所述 UE的 激活集中小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
[177]在另一个可选的实现方式中:
[178]所述无线收发信机 510, 可以具体用于当 UE从微小区移动到宏小区的过程中, 接 收网络设备下发的控制消息, 所述控制消息中包含所述宏小区的参数, 其中所述目标 小区为所述宏小区, 所述源小区为所述微小区。
[179]由上述实施例可见, 当 UE移动过程中,接收网络设备下发的包含目标小区的参数 的控制消息, 根据该目标小区的参数对 DPCCH的发射功率进行开环功率控制, 以使目 标小区的基站接收到 UE发射的 DPCCH。应用本发明实施例, 当 UE从源小区向目标小区 移动过程中, 可以按照目标小区的参数对 DPCCH的发射功率进行开环控制, 与现有技 术按照 TPC命令字调整 DPCCH的发射功率相比, 由于采用开环功控可以使得目标基站 在 UE移动过程中, 特别是 UE高速移动过程中, 可以接收到 UE发射的 DPCCH, 以此保 证 UE在断开与源小区的连接之前, 可以将目标小区加入激活集, 从而使得 UE可以切 换到目标小区。 [180]本领域的技术人员可以清楚地了解到本发明实施例中的技术可借助软件加必需 的通用硬件平台的方式来实现。 基于这样的理解, 本发明实施例中的技术方案本质上 或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来, 该计算机软件产 品可以存储在存储介质中, 如 R0M/RAM、 磁碟、 光盘等, 包括若干指令用以使得一台 计算机设备 (可以是个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例 或者实施例的某些部分所述的方法。
[181]本说明书中的各个实施例均采用递进的方式描述, 各个实施例之间相同相似的部 分互相参见即可, 每个实施例重点说明的都是与其他实施例的不同之处。 尤其, 对于 系统实施例而言, 由于其基本相似于方法实施例, 所以描述的比较简单, 相关之处参 见方法实施例的部分说明即可。
[182]以上所述的本发明实施方式, 并不构成对本发明保护范围的限定。 任何在本发明 的精神和原则之内所作的修改、 等同替换和改进等, 均应包含在本发明的保护范围之 内。

Claims

权 利 要 求
1、 一种功率控制方法, 其特征在于, 所述方法包括:
当用户设备 UE移动过程中,接收网络设备下发的控制消息,所述控制消息中包含目标 小区的参数, 所述网络设备为所述目标小区的基站或源小区的基站, 所述源小区为所述 UE 进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区切换后的服务小区;
根据所述目标小区的参数对专用物理控制信道 DPCCH的发射功率进行开环功率控制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
2、 根据权利要求 1所述的方法, 其特征在于, 所述接收网络设备下发的控制消息 包括:
接收网络设备下发的将所述目标小区加入所述 UE的激活集的激活集更新消息;或 者,
接收网络设备下发的将所述 UE的服务小区切换为所述目标小区的服务小区更新消 息; 或者,
接收网络设备下发的指示所述 UE将源小区从激活集中删除的激活集更新消息;或 者,
接收网络设备下发的用于携带所述目标小区的参数的新增控制消息。
3、 根据权利要求 2 所述的方法, 其特征在于, 所述根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制, 包括:
当接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集更新消息 时, 所述 UE在与所述目标小区建立无线链路时, 根据所述目标小区的参数对 DPCCH的 发射功率进行开环功率控制; 或者,
当接收到网络设备下发的将所述 UE的服务小区切换为所述目标小区的服务小区更 新消息时, 所述 UE在将所述服务小区切换为所述目标小区时, 根据所述目标小区的参 数对 DPCCH的发射功率进行开环功率控制; 或者,
当接收到网络设备下发的指示所述 UE 将所述源小区从激活集中删除的激活集更 新消息时, 所述 UE 在断开与所述源小区的无线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制。
4、 根据权利要求 1至 3任意一项所述的方法, 其特征在于, 所述目标小区的参数 包括至少一个下述参数:接入所述目标小区的 DPCCH功率偏置值;所述目标小区的 DPCCH 功率提升值; 所述目标小区的主导频发射功率值; 所述 UE采用任意一种下述方式, 根据所述目标小区的参数对 DPCCH的发射功率进 行开环功率控制:
当所述目标小区的参数包括所述 DPCCH功率偏置值时, 所述 UE获得所述 DPCCH功 率偏置值与所述目标小区的导频信道接收码功率值的差值, 以及获得保存的 DPCCH的 功率控制历史值, 将所述差值与所述 DPCCH的功率控制历史值中的较大值确定为所述 DPCCH的发射功率;
当所述目标小区的参数包括所述 DPCCH功率提升值时, 所述 UE获得保存的 DPCCH 的功率控制历史值, 将所述 DPCCH的功率控制历史值与所述 DPCCH功率提升值的和确 定为所述 DPCCH的发射功率;
当所述目标小区的参数包括所述主导频发射功率值时, 所述 UE获得保存的 DPCCH 的功率控制历史值, 以及根据所述主导频发射功率值计算的功率候选值,将所述 DPCCH 的功率控制历史值与所述功率候选值中的较大值确定为所述 DPCCH的发射功率,其中, 所述功率候选值为所述功率控制历史值加上所述主导频发射功率值和所述源小区的导 频信道接收码功率值, 再减去所述源小区的主导频发射功率值和目标小区的导频信道 接收码功率值后的值。
5、 根据权利要求 1至 4任意一项所述的方法, 其特征在于, 所述根据所述目标小 区的参数对 DPCCH的发射功率进行开环功率控制之前, 所述方法还包括:
所述 UE判断 UE是否满足开环功率控制条件;
所述根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制包括: 当判 断结果为 UE满足所述开环功率控制条件时,根据所述目标小区的参数对 DPCCH的发射 功率进行开环功率控制;
其中, 所述开环功率控制条件包括:
所述 UE的速度估计值高于设置的速度门限值; 或者,
当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。
6、 根据权利要求 1至 5任意一项所述的方法, 其特征在于, 所述根据所述目标小 区的参数对 DPCCH的发射功率进行开环功率控制包括: 在接收到所述控制消息后的预 设数目个时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; 所述方法还包括: 在所述预设数目个时隙后的时隙上, 按照所述 UE的激活集中小 区的基站下发的传输功率控制 TPC命令字调整所述 DPCCH的发射功率。
7、 根据权利要求 1至 6任意一项所述的方法, 其特征在于, 所述 UE移动过程包 括所述 UE从微小区移动到宏小区的过程;
所述目标小区为所述宏小区, 所述源小区为所述微小区。
8、 一种功率控制装置, 其特征在于, 所述装置包括:
接收单元, 用于当 UE移动过程中, 接收网络设备下发的控制消息, 所述控制消息 中包含目标小区的参数,所述网络设备为所述目标小区的基站或源小区的基站,所述源小 区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区切换后的服务 小区;
控制单元, 用于根据所述接收单元接收到的目标小区的参数对 DPCCH的发射功率 进行开环功率控制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
9、 根据权利要求 8所述的装置, 其特征在于,
所述接收单元, 具体用于接收网络设备下发的将所述目标小区加入所述 UE的激活 集的激活集更新消息; 或者, 用于接收网络设备下发的将所述 UE的服务小区切换为所 述目标小区的服务小区更新消息; 或者, 用于接收网络设备下发的指示所述 UE将所述 源小区从激活集中删除的激活集更新消息; 或者, 接收网络设备下发的用于携带所述 目标小区的参数的新增控制消息;
所述控制单元, 具体用于当所述接收单元接收到将所述目标小区加入所述 UE的激 活集的激活集更新消息时, 在所述 UE与所述目标小区建立无线链路时, 根据所述目标 小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述接收单元接收到将 所述 UE的服务小区切换为所述目标小区的服务小区更新消息时, 在所述 UE将所述服 务小区切换为所述目标小区时, 根据所述目标小区的参数对 DPCCH的发射功率进行开 环功率控制; 或者, 当所述接收单元接收到将所述源小区从激活集中删除的激活集更 新消息时, 在所述 UE 断开与所述源小区的无线链路时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制。
10、 根据权利要求 8或 9所述的装置, 其特征在于, 所述接收单元接收到的目标 小区的参数包括至少一个下述参数: 接入所述目标小区的 DPCCH功率偏置值; 所述目 标小区的 DPCCH功率提升值; 所述目标小区的主导频发射功率值;
所述控制单元包括至少一个下述子单元:
第一控制子单元, 用于当所述接收单元接收到的目标小区的参数包括所述 DPCCH 功率偏置值时, 获得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功率值 的差值, 以及获得保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的功率 控制历史值中的较大值确定为所述 DPCCH的发射功率;
第二控制子单元, 用于当所述接收单元接收到的目标小区的参数包括所述 DPCCH 功率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控制历史 值与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率;
第三控制子单元, 用于当所述接收单元接收到的目标小区的参数包括所述主导频 发射功率值时, 获得保存的 DPCCH的功率控制历史值, 以及根据所述主导频发射功率 值计算的功率候选值, 将所述 DPCCH的功率控制历史值与所述功率候选值中的较大值 确定为所述 DPCCH的发射功率, 其中, 所述功率候选值为所述功率控制历史值加上所 述主导频发射功率值和所述源小区的导频信道接收码功率值, 再减去所述源小区的主 导频发射功率值和目标小区的导频信道接收码功率值后的值。
1 1、 根据权利要求 8至 10任意一项所述的装置, 其特征在于, 所述装置还包括: 判断单元, 用于判断所述 UE是否满足开环功率控制条件;
所述控制单元,具体用于当所述判断单元的判断结果为所述 UE满足所述开环功率 控制条件时, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
其中, 所述开环功率控制条件包括:
所述 UE的速度估计值高于设置的速度门限值; 或者,
当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。
12、 根据权利要求 8至 11任意一项所述的装置, 其特征在于,
所述控制单元, 具体用于在所述接收单元接收到所述控制消息后的预设数目个时 隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
所述控制单元, 还用于在所述预设数目个时隙后的时隙上, 按照所述 UE的激活集 中小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
13、 根据权利要求 8至 12任意一项所述的装置, 其特征在于,
所述接收单元, 具体用于当 UE从微小区移动到宏小区的过程中, 接收网络设备下 发的控制消息, 所述控制消息中包含所述宏小区的参数, 其中所述目标小区为所述宏 小区, 所述源小区为所述微小区。
14、 一种用户设备 UE, 其特征在于, 所述 UE包括: 无线收发信机和处理器, 其 中,
所述无线收发信机, 用于当 UE移动过程中, 接收网络设备下发的控制消息, 所述 控制消息中包含目标小区的参数, 所述网络设备为所述目标小区的基站或源小区的基站, 所述源小区为所述 UE进行小区切换前的服务小区, 所述目标小区为所述 UE进行小区切换 后的服务小区;
所述处理器, 用于根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控 制, 以使所述目标小区的基站接收到所述 UE发射的 DPCCH。
15、 根据权利要求 14所述的 UE, 其特征在于,
所述无线收发信机, 具体用于接收网络设备下发的将所述目标小区加入所述 UE的 激活集的激活集更新消息; 或者, 接收网络设备下发的将所述 UE的服务小区切换为所 述目标小区的服务小区更新消息; 或者, 接收网络设备下发的指示所述 UE将所述源小 区从激活集中删除的激活集更新消息; 或者, 接收网络设备下发的用于携带所述目标 小区的参数的新增控制消息;
所述处理器, 具体用于当所述无线收发信机接收到网络设备下发的将所述目标小 区加入所述 UE的激活集的激活集更新消息时, 在与所述目标小区建立无线链路时, 根 据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制; 或者, 当所述无线收 发信机接收到网络设备下发的将所述 UE的服务小区切换为所述目标小区的服务小区更 新消息时, 在将所述服务小区切换为所述目标小区时, 根据所述目标小区的参数对 DPCCH 的发射功率进行开环功率控制; 或者, 当所述无线收发信机接收到网络设备下 发的指示所述 UE将所述源小区从激活集中删除的激活集更新消息时,在断开与所述源 小区的无线链路时,根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制。
16、 根据权利要求 14或 15所述的 UE, 其特征在于, 所述无线收发信机接收到的 目标小区的参数包括至少一个下述参数: 接入所述目标小区的 DPCCH功率偏置值; 所 述目标小区的 DPCCH功率提升值; 所述目标小区的主导频发射功率值;
所述处理器, 具体用于当所述目标小区的参数包括所述 DPCCH功率偏置值时, 获 得所述 DPCCH功率偏置值与所述目标小区的导频信道接收码功率值的差值, 以及获得 保存的 DPCCH的功率控制历史值, 将所述差值与所述 DPCCH的功率控制历史值中的较 大值确定为所述 DPCCH的发射功率; 或者, 当所述目标小区的参数包括所述 DPCCH功 率提升值时, 获得保存的 DPCCH的功率控制历史值, 将所述 DPCCH的功率控制历史值 与所述 DPCCH功率提升值的和确定为所述 DPCCH的发射功率; 或者, 当所述目标小区 的参数包括所述主导频发射功率值时, 获得保存的 DPCCH的功率控制历史值, 以及根 据所述主导频发射功率值计算的功率候选值, 将所述 DPCCH的功率控制历史值与所述 功率候选值中的较大值确定为所述 DPCCH的发射功率, 其中, 所述功率候选值为所述 功率控制历史值加上所述主导频发射功率值和所述源小区的导频信道接收码功率值, 再减去所述源小区的主导频发射功率值和目标小区的导频信道接收码功率值后的值。
17、 根据权利要求 14至 16任意一项所述的 UE, 其特征在于,
所述处理器, 还用于判断所述 UE是否满足开环功率控制条件;
所述处理器, 具体用于当判断结果为所述 UE满足所述开环功率控制条件时, 根据 所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
其中, 所述开环功率控制条件包括:
所述 UE的速度估计值高于设置的速度门限值; 或者,
当所述 UE接收到网络设备下发的将所述目标小区加入所述 UE的激活集的激活集 更新消息时, 所述 UE处于下行同步状态, 且在预设时间段内接收到的所述源小区发送 的 DPCCH的质量低于设置的质量门限值。
18、 根据权利要求 14至 17任意一项所述的 UE, 其特征在于,
所述处理器, 具体用于在所述无线收发信机接收到所述控制消息后的预设数目个 时隙上, 根据所述目标小区的参数对 DPCCH的发射功率进行开环功率控制;
所述处理器, 还用于在所述预设数目个时隙后的时隙上, 按照所述 UE的激活集中 小区的基站下发的 TPC命令字调整所述 DPCCH的发射功率。
19、根据权利要求 14至 18任意一项所述的 UE,其特征在于,所述无线收发信机, 具体用于当 UE从微小区移动到宏小区的过程中, 接收网络设备下发的控制消息, 所述 控制消息中包含所述宏小区的参数, 其中所述目标小区为所述宏小区, 所述源小区为 所述微小区。
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