JP6992124B2 - Power control method and equipment - Google Patents

Description

Embodiments of the present invention relate to communication technology, more specifically to power control methods and devices.

Carrier aggregation technology has been introduced into Long Term Evolution-Advance (LTE-A for short) systems to increase system transmission bandwidth.

During carrier aggregation, User Equipment (UE for short) can typically collect a larger number of downlink carriers, while a much smaller number of uplink carriers. In general, for the measurement of some downlink channels based on the non-commutative nature of the channel, the non-commutative characteristics of the channel, such as the precoding matrix index (PMI for short) and the uplink. • Downlink channel measurements are obtained by using the Sounding Reference Symbol (SRS for short). Since the downlink carrier aggregation capacity of a UE is larger than its uplink carrier aggregation capacity, in some time division duplex (TDD) carriers for downlink transmission of the UE, Uplink transmission does not exist. Carrier switching is required to ensure timely SRS transmission. For example, carriers 1 and 2 are used for downlink transmission within the first subframe. Carrier switching is performed when SRS transmission is required within the second subframe. Carrier 2 is changed to carrier 3, which is used to carry SRS. Moreover, the transmission power for the SRS needs to be controlled to ensure that the SRS is received correctly.

The parameter setting of the prior art SRS power control solution depends on some parameters related to physical uplink shared channel (PUSCH) power control, while the UE is for SRS transmission. Unable to get the parameters related to PUSCH power control at the destination carrier used for. As a result, SRS power control is not possible and SRS cannot be received correctly.

An embodiment of the present invention provides a power control method and apparatus, whereby the SRS is transmitted at the optimum transmission power in the carrier to be switched, and the SRS is ensured to be received correctly.

According to the first aspect, the embodiment of the present invention is a step of acquiring the power control parameter for the sounding reference signal SRS, and the power control parameter for the SRS is the target power parameter value for the SRS. Determines the transmit power for SRS in the first carrier based on the step and the power control parameters for SRS, including at least one of the path loss compensation factor, and the closed-loop power control parameter value for SRS. Provides a power control method, including steps to be performed. The UE can calculate the transmission power for the SRS in the first carrier based on the newly configured power control parameters for the SRS, which allows the SRS to calculate the optimum transmission power in the carrier to which it is switched. It is transmitted by and guarantees that the SRS is received correctly.

In a possible design, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

In a possible design, the step of acquiring the power control parameters for the sounding reference signal SRS comprises receiving the power control signaling or cross-carrier power control signaling transmitted by the base station.

In a possible design, power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

In a possible design, the step of obtaining the power control parameters for the sounding reference signal SRS includes the step of obtaining the power control parameters for the SRS from the power control signaling or cross-carrier power control signaling.

In a possible design, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

Using the possible design described above, the UE can obtain power control parameters for the SRS in different ways. The method of acquiring power control parameters for SRS is flexible and features ease of operation.

In a possible design, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value. And the parameter value acquired based on the power adjustment value.

In a possible design, the step of obtaining power control parameters from power control signaling or cross-carrier power control signaling is power for SRS from power control signaling or cross-carrier power control signaling based on the first radio network temporary identifier RNTI. Includes steps to analyze and retrieve control parameters.

In a possible design, the steps to determine the transmission power for SRS based on the power control parameters for SRS are the maximum transmission power of the user equipment UE, the transmission power adjustment value for SRS, the transmission band for SRS. Includes the step of obtaining transmission power for SRS based on at least one of the width, the target power parameter value for SRS, the path loss compensation factor, and the estimated downlink path loss value.

In a possible design, the step of determining the transmission power for SRS based on the power control parameters for SRS is the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1.} Calculate the transmission power P _{SRS, c1} (i) for SRS according to (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _{SRS, c1} } P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe, and P _{SRS_OFFSET, c1} (m) is the transmission power adjustment value for SRS. Where m is equal to 0 or 1, M _{SRS, c1} is the transmission bandwidth for SRS, P _{O_SRS, c1} (j) is the target power parameter value for SRS, where j is 0, 1 , Or equal to 2, α _{SRS, c1} (j) is the path loss compensation factor, PL _{SRS, c1} is the estimated downlink path loss value, including the step.

Using the above possible implementation, the UE can accurately calculate the transmission power for SRS, thereby guaranteeing SRS transmission quality.

In a possible design, prior to the step of determining the transmission power for the SRS based on the power control parameters for the SRS, the method is that the SRS is configured periodically or aperiodically. Further includes steps to determine.

In a possible design, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

In a possible design, prior to the step of acquiring the power control parameters for the SRS, the method is the step of acquiring the transmission power control TPC information, which uses the first radio network temporary identifier RNTI. Further includes steps, which are scrambled information.

In a possible design, the step of acquiring the power control parameter for SRS includes analyzing and extracting the closed loop power control parameter value for SRS from the TPC information based on the first RNTI.

In a possible design, if the power control parameters for SRS include closed-loop power control parameter values for SRS, then before the step of getting the power control parameters for SRS, the method is downlink control information DCI. Including further steps to get.

In a possible design, the step of obtaining power control parameters for SRS includes the step of obtaining closed-loop power control parameter values for SRS based on DCI.

In a possible design, if DCI is the control information acquired in the second carrier, then DCI includes at least the first carrier index.

In a possible design, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

In a possible design, obtaining a closed-loop power control parameter value for SRS based on DCI involves obtaining a closed-loop power control parameter value for SRS at the carrier corresponding to the first carrier index. ..

In a possible design, if DCI is the control information acquired in the first carrier, then acquiring the closed-loop power control parameter values for SRS based on DCI is the closed-loop power control for SRS from DCI. Includes getting parameter values.

Using the above possible design, the UE can obtain closed-loop power control parameter values for SRS in different ways. Moreover, a new DCI format has been defined, which allows the UE to obtain full power control parameters for SRS and ensure the reliability of SRS transmission.

In a possible design, if the closed-loop power control parameter value for SRS is a relative adjustment value, then the method is out of the closed-loop power control information or relative adjustment value for SRS in the previous subframe. Further includes the step of determining the closed loop power control parameter value for SRS based on at least one of.

In a possible design, the step of determining the closed-loop power control parameter value for SRS based on at least one of the closed-loop power control information or relative adjustment values for SRS in the previous subframe is an expression. f _{SRS, c1} (i) = f _{SRS, c1} (i-1) + δ _{SRS, c1} (iK _SRS ) is the step to calculate the closed-loop power control parameter value f _{SRS, c1} (i) for SRS. , F _{SRS, c1} (i-1) are closed-loop power control information for SRS in the previous subframe, δ _{SRS, c1} (iK _SRS ) are relative adjustments, and SRS is periodic. If configured, K _SRS is the period of the subframe of SRS, or if SRS is configured aperiodically, iK _SRS is the subframe number of the previous subframe, containing steps.

In a possible design, the steps to determine the transmission power for SRS based on the power control parameters for SRS are the maximum transmission power of the user equipment UE, the transmission power adjustment value for SRS, the transmission band for SRS. Transmit power for SRS based on at least one of width, target power parameter value for SRS, path loss compensation factor, estimated downlink path loss value, and closed-loop power control parameter for SRS. Includes steps to get.

In a possible design, the step of determining the transmission power for the SRS based on the power control parameters for the SRS is the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1.} (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _{SRS, c1} + f _{SRS, c1} (i)} Transmission power for SRS P In the step of calculating _{SRS, c1} (i), P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe, and P _{SRS_OFFSET, c1} (m) is for SRS. The transmission power adjustment value, where m is equal to 0 or 1, M _{SRS, c1} is the transmission bandwidth for SRS, and P _{O_SRS, c1} (j) is the target power parameter value for SRS. , Α _{SRS, c1} (j) are path loss compensation coefficients, PL _{SRS, c1} are estimated downlink path loss values, and f _{SRS, c1} (i) are closed-loop power control parameter values for SRS. , Including steps.

Using the above possible design, the UE can accurately calculate the transmission power for the SRS in closed loop situations, thereby ensuring that the SRS can be received correctly in different situations.

According to the second aspect, the embodiment of the present invention is a step of acquiring the transmission power in the symbol overlapping portion of the first subframe and the second subframe, and the first subframe is the first. The subframe in which the sounding reference signal SRS is transmitted in the carrier, the second subframe is the subframe in which the SRS or physical channel is transmitted in the second carrier, the step and the transmission power are the user equipment UE. If it is greater than the maximum transmission power of, it is a step of controlling the transmission power for the signal to be transmitted, and the signal to be transmitted includes SRS and / or a physical channel, including a step, a power control method. offer.

In a possible design, prior to the step of controlling the transmission power for the signal to be transmitted, the method determines whether the SRS is configured periodically or aperiodically. Further included.

In a possible design, the step of controlling the transmission power for the signal to be transmitted is the step of controlling the transmission power for the signal to be transmitted based on the periodic configuration of the SRS, or the aperiodic of the SRS. Includes steps to control the transmission power for the signal to be transmitted based on the configuration.

In a possible design, if the SRS is configured periodically, the step of controlling the transmission power for the signal to be transmitted is the step of missing the SRS or performing power scaling for the SRS. include.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH does not contain the uplink control information UCI, then the transmission power for the signal to be transmitted. The controlling step includes the step of missing the PUSCH or performing power scaling for the PUSCH.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH contains uplink control information UCI, then control the transmission power for the signal to be transmitted. The steps to do include missing the SRS or performing power scaling for the SRS.

In a possible design, if the SRS is configured aperiodically and the physical channel is the physical uplink control channel PUCCH, the step of controlling the transmission power for the signal to be transmitted either misses the SRS or Or includes a step of performing power scaling for SRS, or a step of missing PUCCH or performing power scaling for PUCCH.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains a hybrid automatic repeat request HARQ, then control the transmission power for the signal to be transmitted. The steps to do include missing the SRS or performing power scaling for the SRS.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains only the channel state information CSI, then control the transmission power for the signal to be transmitted. Steps include missing SRS or performing power scaling for SRS, or missing PUCCH or performing power scaling for PUCCH.

In a possible design, if the SRS is configured aperiodically, the physical channel is the packet random access channel PRACH, and the PRACH occurs simultaneously, then the step of controlling the transmission power for the signal to be transmitted. Includes the step of missing the SRS or performing power scaling for the SRS.

The implementation principles and beneficial effects of the power control methods provided in this embodiment are similar to those of the first aspect and details are not described here again.

According to a third aspect, an embodiment of the present invention provides a power control method, wherein the method is a step of acquiring power control parameters for a sounding reference signal SRS in a first carrier, the SRS. The power control parameters for the step and the user equipment UE for the SRS include at least one of a target power parameter value for the SRS, a path loss compensation factor, and a closed-loop power control parameter value for the SRS. Includes a step of transmitting the power control parameters for the SRS to the UE so as to determine the transmission power for the SRS in the first carrier based on the power control parameters of.

In a possible design, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

In a possible design, the step of transmitting the power control parameters for the SRS to the user equipment UE is the step of transmitting the power control parameters for the SRS to the UE by using power control signaling or cross-carrier power control signaling. include.

In a possible design, power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

In a possible design, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

In a possible design, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value. And the parameter value acquired based on the power adjustment value.

In a possible design, the step of transmitting power control parameters for SRS to the UE by using power control signaling or cross-carrier power control signaling is the power for SRS based on the first radio network temporary identifier RNTI. Includes a step of scrambling control parameters to generate power control signaling or cross-carrier power control signaling, and a step of transmitting power control or cross-carrier power control signaling to the UE.

In a possible design, the SRS is configured periodically or aperiodically.

In a possible design, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

In a possible design, the method is to send the TPC information to the UE so that the UE analyzes and retrieves the closed-loop power control parameter values for SRS from the transmission power control TPC information. It further includes steps, which are information scrambled using the wireless network temporary identifier RNTI of 1.

In a possible design, if the power control parameters for SRS include closed-loop power control parameters for SRS, the method is for the UE to get the closed-loop power control parameter values for SRS based on the downlink control information DCI. It also includes a step to send the DCI to the UE so that it does.

In a possible design, if DCI is the control information acquired in the second carrier, then DCI contains at least the first carrier index and DCI is the SRS in the carrier corresponding to the first carrier index. Used to instruct the UE to get the closed-loop power control parameter value for.

In a possible design, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

In a possible design, if DCI is the control information acquired in the first carrier, DCI is used to instruct the UE to acquire the closed-loop power control parameter value for SRS from DCI. ..

The implementation principles and beneficial effects of the power control methods provided in this embodiment are similar to those of the first aspect and details are not described here again.

According to the fourth aspect, the embodiment of the present invention is
The acquisition module is configured to acquire the power control parameters for the sounding reference signal SRS, the power control parameters for the SRS are the target power parameter values for the SRS, the path loss compensation factor, and for the SRS. With the acquisition module, which contains at least one of the closed-loop power control parameter values of
A determination module configured to determine the transmission power for the SRS in the first carrier based on the power control parameters for the SRS.
To provide a power control device including.

In a possible design, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

In a possible design, the acquisition module is specifically configured to receive power control signaling or cross-carrier power control signaling transmitted by the base station.

In a possible design, power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

In a possible design, the acquisition module is further configured to acquire power control parameters for the SRS, specifically from power control signaling or cross-carrier power control signaling.

In a possible design, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

In a possible design, the target power parameter value for the SRS is either a parameter value obtained based on the preamble initial receive target power value, or
The target power parameter value for SRS is the parameter value acquired based on the preamble initial receive target power value and the power adjustment value.

In a possible design, the acquisition module may acquire power control parameters from power control signaling or cross-carrier power control signaling.
The acquisition module involves analyzing and retrieving power control parameters for SRS from power control signaling or cross-carrier power control signaling based on the first radio network temporary identifier RNTI.

In a possible design, the decision module is specifically the maximum transmission power of the user equipment UE, the transmission power adjustment value for SRS, the transmission bandwidth for SRS, the target power parameter value for SRS, the path loss compensation. It is configured to acquire transmission power for SRS based on a factor and at least one of the estimated downlink path loss values.

In a possible design, the decision module is specifically the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1} (m) + 10log ₁₀ (M _{SRS, c1} ) + It is configured to calculate the transmission power P _{SRS, c1} (i) for SRS according to P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _{SRS, c1} }, where P _{CMAX, c1} ( i) is the maximum transmission power of the user equipment UE in the i-th subframe, P _{SRS_OFFSET, c1} (m) is the transmission power adjustment value for SRS, where m is equal to 0 or 1 and M _{SRS , c1} is the transmission bandwidth for SRS, P _{O_SRS, c1} (j) is the target power parameter value for SRS, where j is equal to 0, 1, or 2 and α _{SRS, c1} ( j) is the path loss compensation coefficient, and PL _{SRS, c1} is the estimated downlink path loss value.

In a possible design, the decision module is further configured to determine whether the SRS is periodically or aperiodically configured.

In a possible design, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

In a possible design, the acquisition module is further configured to acquire transmission power control TPC information, where the TPC information is scrambled information using the first wireless network temporary identifier RNTI.

In a possible design, it is possible for the acquisition module to acquire the power control parameters for the SRS.
The acquisition module involves analyzing and retrieving the closed-loop power control parameter values for SRS from the TPC information based on the first RNTI.

In a possible design, if the power control parameters for SRS include closed-loop power control parameter values for SRS.
The acquisition module is further configured to acquire the downlink control information DCI.

In a possible design, the acquisition module may acquire the power control parameters for the SRS.
The acquisition module involves acquiring closed-loop power control parameter values for SRS based on DCI.

In a possible design, if DCI is the control information acquired in the second carrier, then DCI includes at least the first carrier index.

In a possible design, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

In a possible design, the acquisition module may acquire the closed-loop power control parameter values for SRS based on DCI.
The acquisition module comprises acquiring the closed-loop power control parameter value for SRS at the carrier corresponding to the first carrier index.

In a possible design, if DCI is the control information acquired in the first carrier,
The acquisition module may acquire the closed-loop power control parameter value for SRS based on DCI.
The acquisition module involves acquiring closed-loop power control parameter values for SRS from DCI.

In a possible design, if the closed-loop power control parameter value for SRS is a relative adjustment value
The decision module is further configured to determine the closed-loop power control parameter value for the SRS based on at least one of the closed-loop power control information or relative adjustment values for the SRS in the previous subframe. Ru.

In a possible design, the decision module determines the closed-loop power control parameters for the SRS based on at least one of the closed-loop power control information or relative adjustments for the SRS in the previous subframe. That is
The decision module calculates the closed-loop power control parameter value f _{SRS, c1} (i) for SRS according to the equation f _{SRS, c1} (i) = f _{SRS, c1} (i-1) + δ _{SRS, c1} (iK _SRS ). Where f _{SRS, c1} (i-1) is the closed-loop power control information for the SRS in the previous subframe, and δ _{SRS, c1} (iK _SRS ) is the relative adjustment value. , If the SRS is configured periodically, then the K _SRS is the period of the subframe of the SRS, or if the SRS is configured aperiodically, the iK _SRS is the subframe number of the previous subframe. ..

In a possible design, the decision module may determine the transmission power for the SRS based on the power control parameters for the SRS.
The decision module is the maximum transmission power of the user equipment UE, transmission power adjustment value for SRS, transmission bandwidth for SRS, target power parameter value for SRS, path loss compensation coefficient, estimated downlink path loss value. , And to obtain transmission power for SRS based on at least one of the closed-loop power control parameters for SRS.

In a possible design, the decision module may determine the transmission power for the SRS based on the power control parameters for the SRS.
The decision module is the formula P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1} (m) + 10log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS , c1} (j) · PL _{SRS, c1} + f _{SRS, c1} (i)} involves calculating the transmission power P _{SRS, c1} (i) for SRS, where P _{CMAX, c1} (i) The maximum transmission power of the user equipment UE in the i-th subframe, P _{SRS_OFFSET, c1} (m) is the transmission power adjustment value for SRS, where m is equal to 0 or 1 and M _{SRS, c1} is. The transmission bandwidth for SRS, P _{O_SRS, c1} (j) is the target power parameter value for SRS, α _{SRS, c1} (j) is the path loss compensation factor, and PL _{SRS, c1} is estimated. It is a downlink path loss value, and f _{SRS, c1} (i) is a closed-loop power control parameter value for SRS.

The mounting principles and beneficial effects of the power control device provided in this embodiment are similar to those of the first aspect, and details are not described here again.

According to the fifth aspect, the embodiment of the present invention is
An acquisition module configured to acquire transmission power in the symbol overlap portion of the first subframe and the second subframe, in which the first subframe is transmitted by the sounding reference signal SRS in the first carrier. The second subframe is the acquisition module, which is the subframe in which the SRS or physical channel is transmitted in the second carrier.
If the transmission power is greater than the maximum transmission power of the user equipment UE, then the processing module is configured to control the transmission power for the signal to be transmitted and the signal to be transmitted is SRS and / or physical. Processing modules, including channels, and
To provide a power control device including.

In a possible design, the processing module is further configured to determine whether the SRS is configured periodically or aperiodically.

In a possible design, it is possible for the processing module to control the transmission power for the signal to be transmitted.
The processing module controls the transmission power for the signal to be transmitted based on the periodic configuration of the SRS, or the processing module is for the signal to be transmitted based on the aperiodic configuration of the SRS. Includes controlling the transmission power of.

In a possible design, if the SRS is configured periodically, it is possible for the processing module to control the transmission power for the signal to be transmitted.
The processing module involves missing the SRS or performing power scaling for the SRS.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH does not contain the uplink control information UCI.
It is not possible for the processing module to control the transmission power for the signal to be transmitted.
The processing module involves missing the PUSCH or performing power scaling for the PUSCH.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH contains the uplink control information UCI.
It is not possible for the processing module to control the transmission power for the signal to be transmitted.
The processing module involves missing the SRS or performing power scaling for the SRS.

In a possible design, if the SRS is configured aperiodically and the physical channel is the physical uplink control channel PUCCH.
It is not possible for the processing module to control the transmission power for the signal to be transmitted.
It involves the processing module missing the SRS or performing power scaling for the SRS, or the processing module missing the PUCCH or performing power scaling for the PUCCH.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains a hybrid automatic repeat request HARQ.
It is not possible for the processing module to control the transmission power for the signal to be transmitted.
The processing module involves missing the SRS or performing power scaling for the SRS.

In a possible design, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains only the channel state information CSI.
It is not possible for the processing module to control the transmission power for the signal to be transmitted.
It involves the processing module missing the SRS or performing power scaling for the SRS, or the processing module missing the PUCCH or performing power scaling for the PUCCH.

In a possible design, if the SRS is configured aperiodically, the physical channel is the packet random access channel PRACH, and the PRACH occurs at the same time.
It is not possible for the processing module to control the transmission power for the signal to be transmitted.
The processing module involves missing the SRS or performing power scaling for the SRS.

The mounting principles and beneficial effects of the power control device provided in this embodiment are similar to those of the first aspect, and details are not described here again.

According to the sixth aspect, the embodiment of the present invention is:
It is an acquisition module configured to acquire the power control parameters for the sounding reference signal SRS in the first carrier, and the power control parameters for SRS are the target power parameter value for SRS, the path loss compensation coefficient. , And the acquisition module, which contains at least one of the closed-loop power control parameter values for SRS.
A transmission module configured to transmit the power control parameters for the SRS to the UE so that the user equipment UE determines the transmission power for the SRS in the first carrier based on the power control parameters for the SRS. When,
To provide a power control device including.

In a possible design, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

In a possible design, the transmit module is specifically configured to transmit power control parameters for the SRS to the UE by using power control signaling or cross-carrier power control signaling.

In a possible design, power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

In a possible design, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

In a possible design, the target power parameter value for the SRS is either a parameter value obtained based on the preamble initial receive target power value, or
The target power parameter value for SRS is the parameter value acquired based on the preamble initial receive target power value and the power adjustment value.

In a possible design, the transmit module may transmit power control parameters for the SRS to the UE by using power control signaling or cross-carrier power control signaling.
The transmit module scrambles the power control parameters for the SRS based on the first radio network temporary identifier RNTI to generate power control signaling or cross-carrier power control signaling, and the power control signaling or cross-carrier power control signaling UE. Including sending to.

In a possible design, the SRS is configured periodically or aperiodically.

In a possible design, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

In a possible design, the transmit module is further configured to send TPC information to the UE so that the UE analyzes and retrieves the closed-loop power control parameter values for SRS from the transmission power control TPC information, where the TPC The information is information scrambled using the first wireless network temporary identifier RNTI.

In a possible design, if the power control parameters for SRS include closed-loop power control parameter values for SRS.
The transmit module is further configured to transmit the DCI to the UE so that the UE obtains the closed-loop power control parameter values for the SRS based on the downlink control information DCI.

In a possible design, if DCI is the control information acquired in the second carrier, then DCI contains at least the first carrier index and DCI is the SRS in the carrier corresponding to the first carrier index. Used to instruct the UE to get the closed-loop power control parameter value for.

In a possible design, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

In a possible design, if DCI is the control information acquired in the first carrier, DCI is used to instruct the UE to acquire the closed-loop power control parameter value for SRS from DCI. ..

The mounting principles and beneficial effects of the power control device provided in this embodiment are similar to those of the first aspect, and details are not described here again.

In order to more clearly illustrate the technical solutions in the embodiments of the invention or in the prior art, the following briefly describes the accompanying drawings required to illustrate the embodiments or prior art. Obviously, the accompanying drawings in the description below represent some embodiments of the present invention, and those skilled in the art may still be able to derive other drawings from these attached drawings without creative effort.

It is a schematic diagram of the application scenario of the electric power control method by embodiment of this invention. It is a flowchart of the electric power control method according to Embodiment 1 of this invention. It is a flowchart of the electric power control method according to Embodiment 2 of this invention. It is a flowchart of the electric power control method according to Embodiment 3 of this invention. It is a flowchart of the electric power control method according to Embodiment 4 of this invention. It is a structural drawing of the electric power control apparatus according to Embodiment 5 of this invention. It is a structural drawing of the electric power control apparatus according to Embodiment 6 of this invention. It is a structural drawing of the electric power control apparatus according to Embodiment 7 of this invention. It is a structural drawing of UE according to Embodiment 8 of this invention. It is a structural drawing of the base station according to Embodiment 9 of this invention.

FIG. 1 is a schematic diagram of an application scenario of a power control method according to an embodiment of the present invention. The method applies to wireless communication systems, such as LTE-A systems. As shown in FIG. 1, the scenario includes network device 1, user terminal 2, and user terminal 3. The power control method provided in this application is primarily used for data transmission between network devices and user terminals. It should be noted that the scenario may further include other network devices and other user terminals. FIG. 1 is merely an example for illustration purposes and does not impose any restrictions.

The user terminal used in this embodiment of the invention is a device that provides voice and / or data connectivity for the user, a handheld device with wireless connectivity, or other processing connected to a wireless modem. It may be a device. The radio terminal may communicate with one or more core networks through a radio access network (RAN for short). The wireless terminal may be a mobile terminal (also referred to as a "cellular" phone) or a mobile terminal such as a computer provided with the mobile terminal, for example using a wireless access network to exchange voice and / or data. , Portable cellphones, pocket-sized cellphones, handheld cellphones, computer-embedded cellphones, or cellphones in vehicles.

The network device used in this embodiment of the invention may be a device that communicates with a wireless terminal via one or more sectors in a wireless interface in a base station, access point, or access network. The base station is configured to convert received wireless frames into IP packets and received IP packets into wireless frames, acting as a router between the wireless terminal and the rest of the access network. The rest of the access network may include an Internet Protocol (IP) network. The base station may coordinate the attribute management of the wireless interface. For example, the base station may be a GSM® or a base station in CDMA (Base Transceiver Station, BTS for short) or a base station (Node B) in WCDMA®. Alternatively, it may be an evolutionary node B (NodeB, eNB, or e-NodeB, evolutional Node B) in LTE. This is not limited in this application.

FIG. 2 is a flowchart of the power control method according to the first embodiment of the present invention, in which the method is executed by the user equipment UE. As shown in FIG. 2, the method comprises the following steps.

Step 101: Obtain the power control parameters for the sounding reference signal SRS, where the power control parameters for the SRS are the target power parameter values for the SRS, the path loss compensation factor, and the closed-loop power control parameters for the SRS. Contains at least one of the values.

In this embodiment, the UE may acquire power control parameters for the SRS in different ways. For example, a base station transmits preconfigured power control parameters for SRS to the UE by using a source or destination carrier for SRS transmission. Instead, the base station sends the target power parameter values and path loss compensation factors for the SRS to the UE by using physical layer signaling or control signaling, and Transmission power control (TPC). The information is used to indicate to the UE the closed-loop power control parameter values for SRS. Instead, various values in the power control parameters for the SRS may be obtained in other ways.

Step 102: Determine the transmission power for the SRS in the first carrier based on the power control parameters for the SRS.

In this embodiment, since SRS transmission is performed in the carrier, the first carrier is a carrier to be switched after carrier switching based on SRS, and is also referred to as a non-uplink carrier. The UE may calculate the transmission power for the SRS in the first carrier based on the power control parameters for the SRS, whereby the SRS is transmitted in the first carrier with the appropriate transmission power.

In the power control method provided in this embodiment, the UE acquires the power control parameters for the SRS, where the power control parameters are the target power parameter value for the SRS, the path loss compensation factor, and the SRS. Containing at least one of the closed-loop power control parameter values of, the UE determines the transmission power for the SRS in the first carrier based on the power control parameters for the SRS. The UE can calculate the transmission power for the SRS at the switch destination carrier based on the newly configured power control parameters for the SRS, which allows the SRS to calculate the optimum transmission power for the switch destination carrier. It is transmitted by and guarantees that the SRS is received correctly.

Optionally, in the embodiment shown in FIG. 2, the first carrier is a carrier to which the Physical Uplink Shared Channel (PUSCH for short) is not transmitted. That is, the first carrier is used for SRS transmission but not for PUSCH transmission.

FIG. 3 is a flowchart of the power control method according to the second embodiment of the present invention, and the method shown in FIG. 3 is a specific mounting process of step 101. As shown in FIG. 3, the method comprises the following steps.

Step 201: Receives power control or cross-carrier power control signaling transmitted by the base station, where the power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

In this embodiment, the base station may deliver power control signaling to the UE by using power control signaling in the carrier to which it is switched to UE, or power control by using cross-carrier power control signaling. The signaling may be shown to the UE. The cross-carrier power control signaling is received by a carrier other than the carrier of the switching source or the carrier of the switching destination in which the SRS is arranged, and the SRS transmission in the carrier of the switching destination after the carrier switching based on the SRS is performed. Includes signaling used for notification of relevant power configurations for. In other words, cross-carrier power control signaling is signaling transmitted by the base station on a carrier other than the source carrier or the switch destination carrier, and the signaling is power control for SRS at the switch destination carrier. Includes parameters. The open-loop power control signaling may include a target power parameter value and a path loss compensation factor for the SRS. The closed-loop power control signaling may include a target power parameter value for the SRS, a path loss compensation factor, and a closed-loop power control parameter value for the SRS.

Optionally, power control signaling or cross-carrier power control signaling includes radio resource control (RRC) signaling or physical layer signaling.

Step 202: Obtain power control parameters for SRS from power control signaling or cross-carrier power control signaling.

In this embodiment, after the UE receives the power control or cross-carrier power control signaling delivered by the base station, the UE analyzes the power control or cross-carrier power control signaling to control the power for SRS. Get the parameters.

Optionally, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value and It is a parameter value acquired based on the power adjustment value.

In this embodiment, the base station may transmit a preamble initial receive target power value to the UE by using power control signaling or cross-carrier power control signaling, which is based on the preamble initial receive target power value. And calculate the target power parameter value for SRS. Instead, the base station calculates the target power parameter value for the SRS by adding the preamble initial receive target power value and the power adjustment value, and uses power control signaling or cross-carrier power control signaling. May send the calculated target power parameter value for SRS to the UE. The power adjustment value may instead be obtained from a specially defined Random Access Channel (RACH) response message. The power adjustment value is also called a power offset or power offset.

In addition, the step of acquiring power control parameters from power control signaling or cross-carrier control signaling is based on a first radio network temporary identity (RNTI for short), power control signaling or cross-carrier power control signaling. Includes steps to analyze and retrieve power control parameters for SRS from.

In this embodiment, the first RNTI differs from the prior art TPC-RNTI. The first RNTI is the RNTI redefined in this application and the first RNTI may be named TPC-SRS-RNTI. The first RNTI is used to scramble or mask the power control parameters for the SRS, and the scrambled parameters are carried within the physical layer signaling for display to the UE. Will be done.

In the power control method provided in this embodiment, the UE receives power control signaling or cross-carrier power control signaling transmitted by the base station and power control for SRS from power control signaling or cross-carrier power control signaling. Get the parameters. The base station may present the power control parameters for SRS to the UE by using RRC signaling, MAC signaling, or physical layer signaling, or by using the newly defined RNTI, the SRS. The power control parameters for this may be further scrambled. The base station presents the power control parameters for the SRS to the UE in different ways. The method is flexible and features ease of operation.

Optionally, the steps to determine the transmission power for the SRS based on the power control parameters for the SRS are the maximum transmission power of the user equipment UE, the transmission power adjustment value for the SRS, and the transmission bandwidth for the SRS. , Includes the step of acquiring transmission power for SRS based on at least one of a target power parameter value for SRS, a path loss compensation factor, and an estimated downlink path loss value.

Specifically, in the open loop, the step of determining the transmission power for SRS based on the power control parameters for SRS is the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), Transmission power for SRS according to P _{SRS_OFFSET, c1} (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _c1 } P _{SRS, c1} (i) P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe, and P _{SRS_OFFSET, c1} (m) is the transmission power adjustment value for SRS. , Where m is equal to 0 or 1, M _{SRS, c1} is the transmission bandwidth for SRS, _{PO_SRS, c1} (j) is the target power parameter value for SRS, where j is 0 , 1, or 2, where α _{SRS, c1} (j) is the path loss compensation factor and PL _c1 is the estimated downlink path loss value, including the step. α _{SRS, c1} (j) may be fixed at 1, and for P _{O_SRS, c1} (j), j is usually equal to 2. When j is equal to 0, P _{O_SRS, c1} (j) is semi-permanent scheduled transmission power, and when j is equal to 1, P _{O_SRS, c1} (j) is dynamic scheduling transmission power, j. When is equal to 2, P _{O_SRS, c1} (j) is the random access scheduling transmission power.

In addition, prior to the step of determining the transmission power for the SRS based on the power control parameters for the SRS, the method determines whether the SRS is configured periodically or aperiodically. Including further steps to do.

In this embodiment, the UE determines whether the SRS is configured periodically or aperiodically to ensure that the SRS can be received correctly in various situations. The transmission power for the SRS may then be determined based on the characteristics of the periodic configuration of the SRS and the power control parameters for the SRS.

Optionally, in a closed-loop situation, if the power control parameter for SRS contains a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute or relative adjustment value. be.

In this embodiment, if the closed-loop power control parameter value for SRS is an absolute value, the absolute value may be used directly to calculate the transmitted power for SRS, closed-loop for SRS. If the power control parameter value is a relative adjustment value, the closed-loop power control parameter value for SRS must first be calculated based on the relative adjustment value, and then the SRS obtained through the calculation. The closed-loop power control parameter value for is used to calculate the transmitted power for the SRS.

Optionally, if the closed-loop power control parameter value for SRS is a relative adjustment value, then the method is out of the closed-loop power control information or relative adjustment value for SRS in the previous subframe. It further comprises a step of determining closed-loop power control parameter values for SRS based on at least one.

Specifically, the step of determining the closed-loop power control parameter value for SRS based on at least one of the closed-loop power control information or relative adjustment values for SRS in the previous subframe is an expression. f _c1 (i) = f _c1 (i-1) + δ _{SRS, c1} (iK _SRS ) is the step to calculate the closed-loop power control parameter value f _c1 (i) for SRS, f _c1 (i- 1) is the closed-loop power control information for the SRS in the previous subframe, δ _{SRS, c1} (iK _SRS ) is the relative adjustment value, and if the SRS is periodically configured, then K The _SRS is the period of the subframe of the SRS, or if the SRS is configured aperiodically, the iK _SRS is the subframe number of the previous subframe, including the step.

In addition, the steps to determine the transmission power for the SRS based on the power control parameters for the SRS are the maximum transmission power of the user equipment UE, the transmission power adjustment value for the SRS, the transmission bandwidth for the SRS, and the SRS. The step of acquiring transmission power for SRS based on at least one of the target power parameter value for, the path loss compensation factor, the estimated downlink path loss value, and the closed-loop power control parameter for SRS. including.

Specifically, the step of determining the transmission power for SRS based on the power control parameters for SRS is the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1.} (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _c1 + f _{SRS, c1} (i)} Transmission power for SRS P _SRS, In the step of calculating _c1 (i), P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe in the carrier C1 to be switched, and P _{SRS_OFFSET, c1} (m). ) Is the transmission power adjustment value for SRS, where m is equal to 0 or 1, M _{SRS, c1} is the transmission bandwidth for SRS, and P _{O_SRS, c1} (j) is for SRS. The target power parameter value, α _{SRS, c1} (j) is the path loss compensation factor, PL _c1 is the estimated downlink path loss value, and f _c1 (i) is the closed-loop power control parameter value for SRS. Yes, including steps. α _{SRS, c1} (j) may be fixed at 1, and for P _{O_SRS, c1} (j), j is usually equal to 2. When j is equal to 0, P _{O_SRS, c1} (j) is semi-permanent scheduled transmission power, and when j is equal to 1, P _{O_SRS, c1} (j) is dynamic scheduling transmission power, j. When is equal to 2, P _{O_SRS, c1} (j) is the random access scheduling transmission power.

Further, prior to the step of acquiring the power control parameters for the SRS, the method is the step of acquiring the transmission power control TPC information, which is scrambled or masked using the first RNTI. Further includes steps, which are information.

Still further, the step of acquiring the power control parameter for SRS includes analyzing and extracting the closed loop power control parameter value for SRS from the TPC information based on the first RNTI.

In this embodiment, the closed-loop power control parameter value for the SRS may be included in the TPC information scrambled with the first RNTI, the first RNTI being previously shown to the UE. The UE may descramble the TPC information based on the first RNTI to obtain the closed-loop power control parameter values for the SRS.

Still further, if the power control parameters for SRS include closed-loop power control parameter values for SRS, the method is Downlink Control before the step of getting the power control parameters for SRS. It also includes a step to get Information, abbreviated DCI).

Still further, the step of getting the power control parameters for the SRS includes getting the closed loop power control parameter values for the SRS based on DCI.

In this embodiment, different formats of DCI may be specifically defined as follows.

First DCI format: If DCI is the control information acquired in the second carrier, the DCI includes at least the first carrier index, where the second carrier is the source carrier or the destination carrier. It is any carrier other than the carrier of the above, and the first carrier is the carrier to be switched to.

Correspondingly, in this embodiment, the step of obtaining the closed-loop power control parameter value for SRS based on DCI sets the closed-loop power control parameter value for SRS at the carrier corresponding to the first carrier index. Includes steps to get.

In this embodiment, in the case of cross-carrier notification, the DCI acquired in the switching carrier must include at least the index of the switching carrier, whereby the UE will be based on the first carrier index. Acquires the closed-loop power control parameter value for SRS at the carrier corresponding to CareerIndex.

Second DCI format: If DCI is the control information acquired in the first carrier, the step of acquiring the closed loop power control parameter value for SRS based on DCI is the closed loop power for SRS from DCI. Includes a step to get control parameter values.

In this embodiment, when DCI is the control information acquired in the carrier to which it is switched, the closed loop power control parameter values for SRS in the new DCI format are used directly to perform SRS transmission power control. To.

FIG. 4 is a flowchart of the power control method according to the third embodiment of the present invention. If the symbols of the two subframes overlap and the transmission power at the overlap exceeds the maximum transmission power of the UE, the method is what power control is performed when the carrier switch based on SRS is triggered. Regarding Ruka. As shown in FIG. 4, the method comprises the following steps.

Step 301: Obtain the transmission power in the symbol overlap portion of the first subframe and the second subframe, where the first subframe is the subframe in which the sounding reference signal SRS is transmitted in the first carrier. Yes, the second subframe is a subframe in which the SRS or physical channel is transmitted in the second carrier.

In this embodiment, if the symbol of the subframe in which the sounding reference signal SRS is transmitted in the first carrier overlaps with the symbol of the subframe in which the SRS or physical channel is transmitted in the second carrier, the symbol overlap portion. The transmission power needs to be calculated. For example, when multiple Timing Advance Groups (TAGs for short) are configured for a UE, for SRS transmission of the UE in one assumed serving carrier / cell within one TAG. When a symbol in subframe i overlaps with a symbol in subframe i or subframe i + 1 used for PUCCH transmission in another serving carrier / cell, the transmission power at the symbol overlap is calculated. Will be done.

Step 302: If the transmission power is greater than the UE's maximum transmission power, then control the transmission power for the signal to be transmitted, where the signal to be transmitted includes SRS and / or physical channels.

In this embodiment, if the transmission power is greater than the maximum transmission power of the UE, then the transmission power for the signal to be transmitted is controlled. For example, if the transmission power is greater than the maximum transmission power of the UE, some of the signals to be transmitted are properly missing or power scaling is performed on the signals to be transmitted.

In the power control method provided in this embodiment, the UE has a first subframe in which the sounding reference signal SRS is transmitted in the first carrier and a second subframe in which the SRS or physical channel is transmitted in the second carrier. If the transmission power in the symbol overlap part of the subframe is acquired and the transmission power is larger than the maximum transmission power of the UE, the transmission power for the signal to be transmitted is controlled, so that the signal to be transmitted is appropriate. It is transmitted with a high power and guarantees the transmission efficiency of the signal to be transmitted.

Optionally, prior to the step of controlling the transmission power for the signal to be transmitted, the method further steps to determine whether the SRS is configured periodically or aperiodically. include.

Further, the step of controlling the transmission power for the signal to be transmitted is a step of controlling the transmission power for the signal to be transmitted based on the periodic configuration of the SRS, or the aperiodic configuration of the SRS. Includes steps to control the transmission power for the signal to be transmitted based on.

In this embodiment, missing a portion of the signal to be transmitted or performing power scaling on a portion of the signal to be transmitted may be selected based on the periodic characteristics of the SRS. ..

Optionally, if the SRS is configured periodically, the steps to control the transmission power for the signal to be transmitted include missing the SRS or performing power scaling for the SRS. ..

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH does not contain the uplink control information UCI, then control the transmission power for the signal to be transmitted. The steps to do include missing the PUSCH or performing power scaling for the PUSCH.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH contains uplink control information UCI, then control the transmission power for the signal to be transmitted. The steps include missing the SRS or performing power scaling for the SRS.

Optionally, if the SRS is configured aperiodically and the physical channel is the physical uplink control channel PUCCH, the step of controlling the transmission power for the signal to be transmitted either misses the SRS or Includes steps to perform power scaling for SRS, or to drop PUCCH or perform power scaling for PUCCH.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains a hybrid automatic repeat request HARQ, then control the transmission power for the signal to be transmitted. The steps include missing the SRS or performing power scaling for the SRS.

Optionally, if the SRS is configured aperiodically, the physical channel is PUCCH, and the PUCCH contains only Channel State Information (CSI for short), the transmission power for the signal to be transmitted. The steps to control include missing the SRS or performing power scaling for the SRS, or missing the PUCCH or performing power scaling for the PUCCH.

In this embodiment, transmission is performed when the SRS is configured aperiodically, the physical channel is PUCCH, the PUCCH contains only the CSI, and the PUCCH does not contain a hybrid automatic repeat reQuest (HARQ for short). The step of controlling the transmission power for the signal to be done is either missing the SRS or performing power scaling for SRS, or missing PUCCH or performing power scaling for PUCCH. Including steps.

Optionally, if the SRS is configured aperiodically, the physical channel is the packet random access channel PRACH, and the PRACH occurs at the same time, then the step of controlling the transmission power for the signal to be transmitted is , Missing SRS or performing power scaling for SRS.

The following describes in detail how to "control the transmission power for a signal to be transmitted based on the periodic characteristics of the SRS" based on the configuration of different UEs.

case 1:

When multiple TAGs are configured for a UE, the symbols in subframe i used for SRS transmission of the UE in one assumed serving carrier / cell in one TAG serve the other. -When overlapping with a symbol in subframe i or subframe i + 1 used for PUCCH / PUSCH transmission in a carrier / cell, if the transmission power at the symbol overlap portion exceeds the maximum transmission power of the UE, the following Case applies.

(1) When the SRS is periodically configured, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, the UE either misses the SRS transmission or power scales for the SRS transmission. To execute.

(2) When the SRS is configured aperiodically, the transmission power at any of the overlapping symbols exceeds the maximum transmission power of the UE, only the PUSCH exists, and the PUSCH is the uplink control information (abbreviated). If UCI) is not included, the UE either misses the PUSCH transmission or performs power scaling for the PUSCH transmission, or the UE misses the SRS transmission or power scaling for the SRS transmission. Execute.

(3) When SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, only PUSCH is present, and PUSCH contains UCI, then the UE will transmit SRS. Miss or perform power scaling for SRS transmission.

(4) When SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power and PUCCH is present, the UE either misses SRS transmission or SRS. Perform power scaling for transmission, or the UE either misses PUSCH transmission or performs power scaling for PUSCH transmission.

(5) When the SRS is configured aperiodically, the transmission power at any of the overlapping symbols exceeds the maximum transmission power of the UE, the PUCCH is present, and the PUCCH is a hybrid automatic repeat request (Hybrid Automatic Repeat reQuest). If HARQ) is included, the UE either misses the SRS transmission or performs power scaling for the SRS transmission.

(6) When SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, PUCCH is present, and PUCCH contains only CSI, then UE will transmit SRS. Or the PUCCH is missing, or the UE performs power scaling for SRS transmission, or power scaling for PUCCH.

Case 2:

When multiple TAGs and more than two serving carriers / cells are configured for the UE, the symbols in the subframe i used for SRS transmission in one serving carrier / cell are the other. Subframe i or subframe i or subframe that overlaps with the symbol in the subframe i used for SRS transmission in the serving carrier / cell and / or is used for PUCCH / PUSCH transmission in another serving carrier / cell. When overlapping with a symbol in frame i + 1, the following case applies if the transmission power for the symbol overlap exceeds the maximum transmission power of the UE.

(1) When the SRS is periodically configured, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, the UE either misses the SRS transmission or power scales for the SRS transmission. To execute.

(2) When the SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the maximum transmission power of the UE, only the PUSCH is present, and the PUSCH does not contain the uplink control information UCI. The UE either misses the PUSCH transmission or performs power scaling for the PUSCH transmission, or the UE either misses the SRS transmission or performs power scaling for the SRS transmission.

(3) When the SRS is configured aperiodically, the transmission power at any of the overlapping symbols exceeds the maximum transmission power of the UE, only PUSCH exists, and PUSCH provides uplink control information (UCI). If included, the UE either misses the SRS transmission or performs power scaling for the SRS transmission.

(4) When SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power and PUCCH is present, the UE either misses SRS transmission or SRS. Perform power scaling for transmission, or the UE either misses PUSCH transmission or performs power scaling for PUSCH transmission.

(5) When the SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, the PUCCH is present, and the PUCCH contains HARQ, the UE will perform SRS transmission. Miss or perform power scaling for SRS transmission.

(6) When SRS is configured aperiodically, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, PUCCH is present, and PUCCH contains only CSI, then UE will transmit SRS. Or the PUCCH is missing, or the UE performs power scaling for SRS transmission, or power scaling for PUCCH.

Case 3:

Multiple TAGs are configured for the UE, where the UE transmits the Physical Random Access Channel (PRACH) in the secondary serving carrier / cell and the SRS transmission in different serving carriers / cells. When PRACH occurs simultaneously within a symbol in the subframe used for, if the transmission power at the symbol overlap exceeds the maximum transmission power of the UE, the following cases apply.

(1) When the SRS is periodically configured, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power, the UE either misses the SRS transmission or power scales for the SRS transmission. To execute.

(2) When SRS is periodically configured, if the transmission power at any of the overlapping symbols exceeds the UE's maximum transmission power and PRACH occurs at the same time, the UE either misses SRS transmission or SRS. Perform power scaling for transmission.

FIG. 5 is a flowchart of the power control method according to the fourth embodiment of the present invention. The method is carried out by the base station. As shown in FIG. 5, the method comprises the following steps.

Step 401: Obtain the power control parameters for the sounding reference signal SRS in the first carrier, where the power control parameters for SRS are the target power parameter values for SRS, the path loss compensation factor, and for SRS. Includes at least one of the closed-loop power control parameter values of.

In this embodiment, the power control parameters for SRS are specially configured to calculate the transmission power for SRS at the switched carrier.

Step 402: Send the power control parameters for the SRS to the UE so that the user equipment UE determines the transmission power for the SRS in the first carrier based on the power control parameters for the SRS.

In this embodiment, the base station may transmit power control parameters for the SRS in different ways. For example, a base station transmits preconfigured power control parameters for SRS to the UE by using a carrier to which it switches for SRS transmission. Instead, the base station sends the target power parameter value and path loss compensation factor for SRS to the UE by using physical layer signaling or control signaling, and Transmission power control (TPC). The information is used to indicate to the UE the closed-loop power control parameter values for SRS. Instead, the base station otherwise sends various values in the power control parameters for the SRS to the UE. The UE may calculate the transmission power for the SRS in the first carrier based on the power control parameters for the SRS, whereby the SRS is transmitted in the first carrier with the appropriate transmission power.

In the power control method provided in this embodiment, the base station acquires the power control parameter for SRS in the first carrier, where the power control parameter is the target power parameter value for SRS, path loss compensation. Containing a factor and at least one of the closed-loop power control parameter values for the SRS, the base station sends the power control parameters for the SRS to the user equipment UE, which causes the UE to power for the SRS. The transmission power for the SRS in the first carrier is determined based on the control parameters. In this way, the UE can calculate the transmission power for the SRS at the destination carrier based on the newly configured power control parameters for the SRS, thereby allowing the SRS to switch to the destination carrier. It is transmitted with the optimum transmission power and guarantees that the SRS is received correctly.

Optionally, the first carrier is one to which PUSCH is not transmitted.

Optionally, the step of transmitting the power control parameters for the SRS to the user equipment UE includes the step of transmitting the power control parameters for the SRS to the UE by using power control signaling or cross-carrier power control signaling. ..

Power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

Power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

Optionally, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value and It is a parameter value acquired based on the power adjustment value.

In addition, the step of transmitting power control parameters for SRS to the UE by using power control signaling or cross-carrier power control signaling sets the power control parameters for SRS based on the first radio network temporary identifier RNTI. Includes steps to scramble to generate power control or cross-carrier power control signaling and send the power control or cross-carrier power control signaling to the UE.

Optionally, the SRS is configured periodically or aperiodically.

Further, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

Still further, the method is to send the TPC information to the UE so that the UE analyzes and retrieves the closed-loop power control parameter values for SRS from the TPC information, where the TPC information is the first wireless network temporary. Further includes steps, which are information scrambled using the identifier RNTI.

Still further, if the power control parameters for SRS include closed-loop power control parameters for SRS, the method is such that the UE obtains the closed-loop power control parameter values for SRS based on the downlink control information DCI. Further includes the step of sending the DCI to the UE.

Optionally, if DCI is the control information acquired in the second carrier, then DCI contains at least the first carrier index and DCI is for SRS in the carrier corresponding to the first carrier index. Used to instruct the UE to get the closed-loop power control parameter value of.

The second carrier is a carrier other than the carrier of the switching source or the carrier of the switching destination, and the first carrier is the carrier of the switching destination.

Optionally, if DCI is the control information acquired in the first carrier, DCI is used to instruct the UE to acquire closed-loop power control parameter values for SRS from DCI.

The power control method provided in this embodiment is realized by the base station and corresponds to the power control method on the UE side. For a detailed explanation of the implementation principle and specific technical features of the method, refer to the power control method on the UE side in the embodiments shown in FIGS. 2 to 4. Details will not be explained here again.

FIG. 6 is a structural diagram of the power control device according to the fifth embodiment of the present invention. As shown in FIG. 6, the device includes an acquisition module 11 and a decision module 12. The acquisition module 11 is configured to acquire the power control parameters for the sounding reference signal SRS, where the power control parameters for the SRS are the target power parameter values for the SRS, the path loss compensation factor, and the SRS. Includes at least one of the closed-loop power control parameter values for. The determination module 12 is configured to determine the transmission power for the SRS in the first carrier based on the power control parameters for the SRS.

The device in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

Optionally, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

Optionally, the acquisition module 11 is specifically configured to acquire power control signaling or cross-carrier power control signaling transmitted by the base station.

Optionally, the power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

Optionally, the acquisition module 11 is further configured to acquire power control parameters for the SRS, specifically from power control signaling or cross-carrier power control signaling.

Optionally, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

Optionally, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value and It is a parameter value acquired based on the power adjustment value.

Optionally, acquisition module 11 acquires power control parameters from power control signaling or cross-carrier power control signaling, while acquisition module 11 acquires power control signaling or cross-carrier based on the first radio network temporary identifier RNTI. Includes analyzing and extracting power control parameters for SRS from power control signaling.

Optionally, the decision module 12, specifically, the maximum transmission power of the user equipment UE, the transmission power adjustment value for SRS, the transmission bandwidth for SRS, the target power parameter value for SRS, the path loss compensation. It is configured to acquire transmission power for SRS based on a factor and at least one of the estimated downlink path loss values.

Optionally, the decision module 12 specifically has the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1} (m) + 10log ₁₀ (M _{SRS, c1} ) + It is configured to calculate the transmission power P _{SRS, c1} (i) for SRS according to P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _{SRS, c1} }, where P _{CMAX, c1} ( i) is the maximum transmission power of the user equipment UE in the i-th subframe, P _{SRS_OFFSET, c1} (m) is the transmission power adjustment value for SRS, where m is equal to 0 or 1 and M _{SRS , c1} is the transmission bandwidth for SRS, P _{O_SRS, c1} (j) is the target power parameter value for SRS, where j is equal to 0, 1, or 2 and α _{SRS, c1} ( j) is the path loss compensation coefficient, and PL _{SRS, c1} is the estimated downlink path loss value.

Optionally, the determination module 12 is further configured to determine whether the SRS is cyclically or aperiodically configured.

Optionally, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

Optionally, the acquisition module 11 is further configured to acquire transmission power control TPC information, where the TPC information is scrambled using the first wireless network temporary identifier RNTI.

Optionally, the acquisition module 11 acquires the power control parameters for the SRS, which means that the acquisition module 11 analyzes the closed-loop power control parameter values for the SRS from the TPC information based on the first RNTI. Including taking out.

Optionally, if the power control parameters for the SRS include closed-loop power control parameter values for the SRS, the acquisition module 11 is further configured to acquire the downlink control information DCI.

Optionally, the acquisition module 11 acquiring the power control parameters for the SRS involves the acquisition module 11 acquiring the closed-loop power control parameter values for the SRS based on DCI.

Optionally, if DCI is the control information acquired in the second carrier, then DCI includes at least the first carrier index.

Optionally, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

Optionally, acquisition module 11 acquires the closed-loop power control parameter value for SRS based on DCI, which means that acquisition module 11 acquires closed-loop power for SRS at the carrier corresponding to the first carrier index. Includes getting control parameter values.

Optionally, if the DCI is the control information acquired in the first carrier, the acquisition module 11 may acquire the closed-loop power control parameter value for the SRS based on the DCI. Includes getting closed-loop power control parameter values for SRS from DCI.

Optionally, if the closed-loop power control parameter value for the SRS is a relative adjustment value, the determination module 12 may use the closed-loop power control information or the relative adjustment value for the SRS in the previous subframe. Further configured to determine closed-loop power control parameter values for SRS based on at least one of them.

Optionally, the decision module 12 determines the closed-loop power control parameters for the SRS based on at least one of the closed-loop power control information or relative adjustments for the SRS in the previous subframe. That is, the determination module 12 has the closed-loop power control parameter value f _{SRS, c1} for SRS according to the equation f _{SRS, c1} (i) = f _{SRS, c1} (i-1) + δ _{SRS, c1} (iK _SRS ). Including computing i), where f _{SRS, c1} (i-1) is the closed-loop power control information for the SRS in the previous subframe, and δ _{SRS, c1} (iK _SRS ) is relative. If it is an adjustment value and the SRS is periodically configured, then the K _SRS is the period of the subframe of the SRS, or if the SRS is configured aperiodically, then the iK _SRS is a subframe of the previous subframe. The frame number.

Optionally, the determination module 12 determines the transmission power for the SRS based on the power control parameters for the SRS, the determination module 12 determines the maximum transmission power of the user equipment UE, the transmission power for the SRS. Based on at least one of the tuning value, transmission bandwidth for SRS, target power parameter value for SRS, path loss compensation factor, estimated downlink path loss value, and closed-loop power control parameter for SRS. Includes acquiring transmission power for SRS.

Optionally, the decision module 12 determines the transmission power for the SRS based on the power control parameters for the SRS, the decision module 12 determines the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1} (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) ・ PL _{SRS, c1} + f _{SRS, c1} (i) } Contains the calculation of the transmission power P _{SRS, c1} (i) for SRS according to, where P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe, P _{SRS_OFFSET , c1} (m) is the transmission power adjustment value for SRS, where m is equal to 0 or 1, M _{SRS, c1} is the transmission bandwidth for SRS, and P _{O_SRS, c1} (j) is Target power parameter values for SRS, α _{SRS, c1} (j) are path loss compensation coefficients, PL _{SRS, c1} are estimated downlink path loss values, and f _{SRS, c1} (i) are SRS. Closed-loop power control parameter value for.

The device in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. 2 or FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

FIG. 7 is a structural diagram of the power control device according to the sixth embodiment of the present invention. As shown in FIG. 7, the apparatus includes an acquisition module 21 and a processing module 22. The acquisition module 21 is configured to acquire the transmission power in the symbol overlap portion of the first subframe and the second subframe, where the first subframe is the sounding reference signal SRS in the first carrier. It is a subframe to be transmitted, and the second subframe is a subframe in which an SRS or a physical channel is transmitted in the second carrier. The processing module 22 is configured to control the transmission power for the signal to be transmitted if the transmission power is greater than the maximum transmission power of the user equipment UE, where the signal to be transmitted is SRS and / or Includes physical channels.

Optionally, the processing module 22 is further configured to determine whether the SRS is cyclically or aperiodically configured.

Optionally, the processing module 22 controls the transmission power for the signal to be transmitted, that is, the processing module 22 controls the transmission power for the signal to be transmitted based on the periodic configuration of the SRS. Controlling, or the processing module 22, includes controlling the transmission power for a signal to be transmitted based on the aperiodic configuration of the SRS.

Optionally, if the SRS is configured periodically, the processing module 22 controls the transmission power for the signal to be transmitted, the processing module 22 either misses the SRS or the SRS. Includes performing power scaling for.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH does not contain the uplink control information UCI, then the processing module 22 is for the signal to be transmitted. Controlling the transmission power of the processing module 22 includes either missing the PUSCH or performing power scaling for the PUSCH.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH contains uplink control information UCI, then the processing module 22 is for the signal to be transmitted. Controlling the transmission power involves the processing module 22 missing the SRS or performing power scaling for the SRS.

Optionally, if the SRS is configured aperiodically and the physical channel is the physical uplink control channel PUCCH, then it is the processing module that the processing module 22 controls the transmission power for the signal to be transmitted. 22 includes missing SRS or performing power scaling for SRS, or processing module 22 missing PUCCH or performing power scaling for PUCCH.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains a hybrid automatic repeat request HARQ, then the processing module 22 is for the signal to be transmitted. Controlling the transmission power involves the processing module 22 missing the SRS or performing power scaling for the SRS.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains only the channel state information CSI, then the processing module 22 is for the signal to be transmitted. Controlling the transmission power means that the processing module 22 either misses the SRS or performs power scaling for the SRS, or the processing module 22 misses the PUCCH or power scales for the PUCCH. Includes running.

Optionally, if the SRS is configured aperiodically, the physical channel is the packet random access channel PRACH, and the PRACH occurs simultaneously, then the processing module 22 has the transmission power for the signal to be transmitted. Controlling the processing module 22 includes either missing the SRS or performing power scaling for the SRS.

The device in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

FIG. 8 is a structural diagram of the power control device according to the seventh embodiment of the present invention. As shown in FIG. 8, the device includes an acquisition module 31 and a transmission module 32. The acquisition module 31 is configured to acquire the power control parameters for the sounding reference signal SRS in the first carrier, where the power control parameters for the SRS are the target power parameter values for the SRS, path loss compensation. Includes coefficients and at least one of the closed-loop power control parameter values for SRS. The transmission module 32 transmits the power control parameter for SRS to the UE so that the user equipment UE determines the transmission power for SRS in the first carrier based on the power control parameter for SRS. It is composed.

Optionally, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

Optionally, the transmit module is specifically configured to transmit power control parameters for the SRS to the UE by using power control signaling or cross-carrier power control signaling.

Optionally, the power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

Optionally, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

Optionally, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value and It is a parameter value acquired based on the power adjustment value.

Optionally, the transmit module may transmit the power control parameters for SRS to the UE by using power control signaling or cross-carrier power control signaling, which causes the transmit module to the first radio network temporary identifier RNTI. Includes scrambling power control parameters for SRS based on generating power control or cross-carrier power control signaling and sending power control or cross-carrier power control signaling to the UE.

Optionally, the SRS is configured periodically or aperiodically.

Optionally, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

Optionally, the transmit module is further configured to send TPC information to the UE so that the UE analyzes and retrieves the closed-loop power control parameter values for SRS from the transmission power control TPC information, where the TPC information. Is information scrambled using the first wireless network temporary identifier RNTI.

Optionally, if the power control parameters for SRS include closed-loop power control parameters for SRS, the transmit module will allow the UE to get the closed-loop power control parameter values for SRS based on the downlink control information DCI. Further configured to send DCI to the UE.

Optionally, if DCI is the control information acquired in the second carrier, then DCI contains at least the first carrier index and DCI is for SRS in the carrier corresponding to the first carrier index. Used to instruct the UE to get the closed-loop power control parameter value of.

Optionally, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

Optionally, if DCI is the control information acquired in the first carrier, DCI is used to instruct the UE to acquire closed-loop power control parameter values for SRS from DCI.

The device in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

FIG. 9 is a structural diagram of the UE according to the eighth embodiment of the present invention. The UE may include a processor 401 and a memory 402. The device may further include a transmit interface 403 and a receive interface 404. The transmission interface 403 and the reception interface 404 may be connected to the processor 401. The transmission interface 403 is used to transmit data or information, and the transmission interface 403 may be a wireless transmission device. The receiving interface 404 is used to receive data or information, and the receiving interface 404 may be a wireless receiver. Memory 402 stores executable instructions. When the device operates, the processor 401 communicates with the memory 402, and the processor 401 calls an executable instruction in the memory 402 to perform the following operation, ie:
Sounding reference signal In the step of acquiring the power control parameters for the SRS, the power control parameters for the SRS are the target power parameter value for the SRS, the path loss compensation factor, and the closed-loop power control parameter value for the SRS. Steps, including at least one of
The step of determining the transmission power for the SRS in the first carrier based on the power control parameters for the SRS,
To execute.

Optionally, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

Optionally, the processor 401 acquiring the power control parameters for the sounding reference signal SRS comprises receiving the power control signaling or cross-carrier power control signaling transmitted by the base station.

Optionally, the power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

Optionally, the processor 401 obtains the power control parameters for the sounding reference signal SRS, which means that the processor 401 obtains the power control parameters for the SRS from the power control signaling or cross-carrier power control signaling. include.

Optionally, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

Optionally, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value and It is a parameter value acquired based on the power adjustment value.

Optionally, the processor 401 obtains power control parameters from power control signaling or cross-carrier power control signaling, which allows the processor 401 to obtain power control signaling or cross-carrier power control based on the first radio network temporary identifier RNTI. Includes analyzing and extracting power control parameters for SRS from signaling.

Optionally, the processor 401 determines the transmission power for the SRS based on the power control parameters for the SRS, which means that the processor 401 determines the maximum transmission power of the user equipment UE, the transmission power adjustment value for the SRS. To obtain transmission power for SRS based on at least one of the transmission bandwidth for SRS, the target power parameter value for SRS, the path loss compensation factor, and the estimated downlink path loss value. including.

Optionally, the processor 401 determines the transmission power for the SRS based on the power control parameters for the SRS.
P _{SRS, c1} (i) = min {P _{CMAX, c1} (i), P _{SRS_OFFSET, c1} (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) -Includes calculating the transmission power P _{SRS, c1} (i) for SRS according to PL _{SRS, c1} }, where P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe. Where P _{SRS_OFFSET, c1} (m) is the transmission power adjustment value for SRS, where m is equal to 0 or 1, and M _{SRS, c1} is the transmission bandwidth for SRS, P _{O_SRS, c1} (j) is the target power parameter value for SRS, where j is equal to 0, 1, or 2, α _{SRS, c1} (j) is the path loss compensation factor, and PL _{SRS, c1} is estimated. The downlink path loss value.

Optionally, the processor 401 is further configured to determine whether the SRS is cyclically or aperiodically configured.

Optionally, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

Optionally, the processor 401 is further configured to acquire transmission power control TPC information, where the TPC information is scrambled using the first wireless network temporary identifier RNTI.

Optionally, processor 401 is further configured to parse and retrieve closed-loop power control parameter values for SRS from TPC information based on the first RNTI.

Optionally, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, processor 401 is further configured to acquire downlink control information DCI.

Optionally, the processor 401 acquiring the power control parameters for the SRS involves the processor 401 acquiring the closed-loop power control parameter values for the SRS based on DCI.

Optionally, if DCI is the control information acquired in the second carrier, then DCI includes at least the first carrier index.

Optionally, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

Optionally, the processor 401 obtains the closed-loop power control parameter value for SRS based on DCI, which means that the processor 401 gets the closed-loop power control parameter for SRS at the carrier corresponding to the first carrier index. Includes getting a value.

Optionally, if the DCI is the control information acquired in the first carrier, the processor 401 can acquire the closed-loop power control parameter value for the SRS based on the DCI, the processor 401 from the DCI. Includes getting closed-loop power control parameter values for SRS.

Optionally, if the closed-loop power control parameter value for SRS is a relative adjustment value, the processor 401 is out of the closed-loop power control information or relative adjustment value for SRS in the previous subframe. Further configured to determine closed-loop power control parameter values for SRS based on at least one of.

Optionally, the processor 401 determines the closed-loop power control parameters for the SRS based on at least one of the closed-loop power control information or relative adjustments for the SRS in the previous subframe. Processor 401 has closed-loop power control parameter values f _{SRS, c1} (i) for SRS according to the equation f _{SRS, c1} (i) = f _{SRS, c1} (i-1) + δ _{SRS, c1} (iK _SRS ). Where f _{SRS, c1} (i-1) is the closed-loop power control information for the SRS in the previous subframe, and δ _{SRS, c1} (iK _SRS ) is the relative adjustment value. If the SRS is periodically configured, then the K _SRS is the period of the subframe of the SRS, or if the SRS is configured aperiodically, then the iK _SRS is the subframe number of the previous subframe. Is.

Optionally, the processor 401 determines the transmission power for the SRS based on the power control parameters for the SRS, the processor 401 is the maximum transmission power of the user equipment UE, the transmission power adjustment value for the SRS. , Transmission bandwidth for SRS, target power parameter value for SRS, path loss compensation factor, estimated downlink path loss value, and closed-loop power control parameter for SRS. Includes acquiring transmission power for SRS.

Optionally, the processor 401 determines the transmission power for the SRS based on the power control parameters for the SRS, which means that the processor 401 determines the transmission power for the SRS by the equation P _{SRS, c1} (i) = min {P _{CMAX, c1} ( i), P _{SRS_OFFSET, c1} (m) +10 log ₁₀ (M _{SRS, c1} ) + P _{O_SRS, c1} (j) + α _{SRS, c1} (j) · PL _{SRS, c1} + f _{SRS, c1} (i)} The transmission power for SRS involves calculating P _{SRS, c1} (i), where P _{CMAX, c1} (i) is the maximum transmission power of the user equipment UE in the i-th subframe, P _{SRS_OFFSET, c1.} (m) is the transmission power adjustment value for SRS, where m is equal to 0 or 1, M _{SRS, c1} is the transmission bandwidth for SRS, and P _{O_SRS, c1} (j) is for SRS. Because α _{SRS, c1} (j) is the path loss compensation coefficient, PL _{SRS, c1} is the estimated downlink path loss value, and f _{SRS, c1} (i) is the SRS. Closed-loop power control parameter value.

The UE in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. 2 or FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

Embodiments of this application further provide the UE, where the structure of the UE is the same as the structure of the UE shown in FIG. When the UE operates, the processor communicates with the memory, and the processor calls the executable instructions in the memory to do the following, i.e.
It is a step of acquiring the transmission power in the symbol overlapping portion of the first subframe and the second subframe, and the first subframe is a subframe in which the sounding reference signal SRS is transmitted in the first carrier. , The second subframe is the subframe in which the SRS or physical channel is transmitted in the second carrier, step and
If the transmission power is greater than the maximum transmission power of the UE, then the step of controlling the transmission power for the signal to be transmitted, wherein the signal to be transmitted includes the SRS and / or the physical channel.
To execute.

Optionally, the processor is further configured to determine whether the SRS is configured periodically or aperiodically.

Optionally, the processor controls the transmission power for the signal to be transmitted, that the processor controls the transmission power for the signal to be transmitted based on the periodic configuration of the SRS. Alternatively, the processor may control the transmission power for a signal to be transmitted based on the aperiodic configuration of the SRS.

Optionally, if the SRS is configured periodically, the processor controlling the transmission power for the signal to be transmitted either misses the SRS or performs power scaling for the SRS. Including that.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH does not contain the uplink control information UCI, then the processor transmits for the signal to be transmitted. Controlling the power involves the processor either missing the PUSCH or performing power scaling for the PUSCH.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink shared channel PUSCH, and the PUSCH contains uplink control information UCI, then the processor has the transmission power for the signal to be transmitted. Controlling the processor involves either missing the SRS or performing power scaling for the SRS.

Optionally, if the SRS is configured aperiodically and the physical channel is the physical uplink control channel PUCCH, then the processor controls the transmission power for the signal to be transmitted by the processor. Includes missing or performing power scaling for SRS, or the processor missing PUCCH or performing power scaling for PUCCH.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains a hybrid automatic repeat request HARQ, then the processor has the transmission power for the signal to be transmitted. Controlling the processor involves either missing the SRS or performing power scaling for the SRS.

Optionally, if the SRS is configured aperiodically, the physical channel is the physical uplink control channel PUCCH, and the PUCCH contains only the channel state information CSI, then the processor has the transmission power for the signal to be transmitted. Controlling includes the processor missing the SRS or performing power scaling for the SRS, or the processor missing the PUCCH or performing power scaling for the PUCCH. ..

Optionally, if the SRS is configured aperiodically, the physical channel is the packet random access channel PRACH, and the PRACH occurs simultaneously, the processor controls the transmission power for the signal to be transmitted. Doing so involves the processor missing the SRS or performing power scaling for the SRS.

The UE in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

FIG. 10 is a structural diagram of a base station according to the ninth embodiment of the present invention. As shown in FIG. 10, the base station includes a processor 501 and a transmitter 502. The processor 501 is configured to acquire the power control parameters for the sounding reference signal SRS in the first carrier, where the power control parameters for the SRS are the target power parameter values for the SRS, the path loss compensation factor. , And at least one of the closed-loop power control parameter values for SRS. The transmitter 502 transmits the power control parameter for the SRS to the UE so that the user equipment UE determines the transmission power for the SRS in the first carrier based on the power control parameter for the SRS. It is composed.

Optionally, the first carrier is one to which the physical uplink shared channel PUSCH is not transmitted.

Optionally, the transmitter 502 sends the power control parameters for the SRS to the user equipment UE, which means that the transmitter 502 uses power control signaling or cross-carrier power control signaling to power for the SRS. Includes sending control parameters to the UE.

Optionally, the power control signaling includes open-loop power control signaling and / or closed-loop power control signaling.

Optionally, power control signaling or cross-carrier power control signaling includes radio resource control RRC signaling or physical layer signaling.

Optionally, the target power parameter value for SRS is the parameter value obtained based on the preamble initial receive target power value, or the target power parameter value for SRS is the preamble initial receive target power value and It is a parameter value acquired based on the power adjustment value.

Optionally, the transmitter 502 sends the power control parameters for the SRS to the UE by using power control signaling or cross-carrier power control signaling, because the transmitter 502 is based on the RNTI for the SRS. Includes scrambling power control parameters of to generate power control or cross-carrier power control signaling and transmitting power control or cross-carrier power control signaling to the UE.

Optionally, the SRS is configured periodically or aperiodically.

Optionally, if the power control parameter for SRS includes a closed-loop power control parameter value for SRS, the closed-loop power control parameter value for SRS is an absolute value or a relative adjustment value.

Optionally, transmitter 502 is further configured to send transmission power control TPC information to the UE so that the UE analyzes and retrieves the closed-loop power control parameter values for SRS from the TPC information, where the TPC. The information is information scrambled using the first wireless network temporary identifier RNTI.

Optionally, if the power control parameter for SRS includes a closed-loop power control parameter for SRS, the transmitter 502 will cause the UE to set the closed-loop power control parameter value for SRS based on the downlink control information DCI. Further configured to send DCI to the UE to get.

Optionally, if DCI is the control information acquired in the second carrier, then DCI contains at least the first carrier index and DCI is for SRS in the carrier corresponding to the first carrier index. Used to instruct the UE to get the closed-loop power control parameter value of.

Optionally, the second carrier is either a carrier other than the switching source carrier or the switching destination carrier, and the first carrier is the switching destination carrier.

Optionally, if DCI is the control information acquired in the first carrier, DCI is used to instruct the UE to acquire closed-loop power control parameter values for SRS from DCI.

Optionally, as shown in FIG. 10, the base station may further include a memory 503 and a receiver 504. The memory 503 is configured to store instructions and data, and the receiver 504 is configured to receive data or information.

The device in this embodiment may be configured to implement the technical solution of the embodiment of the method shown in FIG. Their mounting principles and technical effects are similar and no further details are provided herein.

Those skilled in the art can appreciate that all or some of the steps of the embodiment of the method can be realized by a program instructing the relevant hardware. The program may be stored in a computer-readable storage medium. When the program runs, the steps of the embodiment of the method are performed. The above storage medium may contain program code such as read-only memory (ROM for short), random access memory (RAM for short), magnetic disk, or optical disk. Includes any medium that can be stored.

Finally, it should be noted that the above embodiments are intended solely to illustrate the technical solutions of the invention and not to limit the invention. Although the present invention has been described in detail with reference to the embodiments described above, those skilled in the art will appreciate that they remain within the scope of the technical solutions of the embodiments of the present invention. It should be understood that modifications can be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some or all of their technical features.

1 Network device
2 User terminal
3 User terminal
11 Acquisition module
12 decision module
21 Acquisition module
31 Acquisition module
32 Send module
401 processor
402 Memory
403 transmission interface
404 Receive interface
501 processor
502 transmitter
503 memory
504 receiver

Claims (25)

It ’s a power control method.
A step of acquiring radio resource control RRC signaling by a user device, a UE, wherein the RRC signaling includes a target power parameter value for a sounding reference signal, an SRS, and a path loss compensation factor.
The step of acquiring the downlink control information, DCI, by the UE, and
A step of acquiring a closed-loop power control parameter value for the SRS based on the DCI and the first radio network temporary identifier, RNTI, by the UE.
A step of determining the transmission power for the SRS in the first carrier based on the target power parameter value, the path loss compensation coefficient, and the closed loop power control parameter value by the UE.
Including
The power control method, wherein the first carrier is a carrier to which the physical uplink shared channel, PUSCH, is not transmitted. The method according to claim 1, wherein the first carrier is a carrier to be switched after switching carriers based on SRS. The step of acquiring the closed-loop power control parameter value for the SRS based on the DCI and the first radio network temporary identifier by the UE is
The step of acquiring transmission power control (TPC) information from the DCI by the UE, wherein the TPC information is scrambled information using the first RNTI, and the first RNTI is the TPC. -SRS-RNTI, step and
A step of analyzing and extracting the closed-loop power control parameter value for the SRS from the TPC information based on the first RNTI by the UE.
The method according to claim 1 or 2, wherein the method comprises. The first RNTI is used to scramble or mask the power control parameters for the SRS, and the scrambled parameters are used within the physical layer signaling for display to the UE. The method according to claim 3, which is transported. Prior to the step of determining the transmission power for the SRS based on the first carrier based on the target power parameter value, the path loss compensation factor, and the closed loop power control parameter value, the method.
The UE further comprises a step of determining the configuration of the SRS, wherein the configuration of the SRS is a periodic configuration of the SRS or an aperiodic configuration of the SRS.
The step of determining the transmission power for the SRS in the first carrier based on the target power parameter value, the path loss compensation coefficient, and the closed loop power control parameter value by the UE is the step.
The step of determining the transmission power for the SRS in the first carrier based on the target power parameter value, the path loss compensation coefficient, the closed loop power control parameter value, and the configuration of the SRS by the UE.
The method according to claim 1. The closed-loop power control parameter value for the SRS corresponds to a first carrier index, wherein the first carrier index identifies the first carrier, any one of claims 1-5. The method described in the section. The method of claim 1, wherein the DCI comprises the first carrier index. It is a power control method, and the above method is
A step of determining the target power parameter value for the sounding reference signal, the SRS, the path loss compensation factor, and the closed-loop power control parameter value for the SRS, depending on the base station.
The step of transmitting the radio resource control RRC signaling to the user equipment, UE, by the base station, wherein the RRC signaling is the target power parameter value for the sounding reference signal (SRS), and the SRS. With the step including the path loss compensation coefficient,
A step of transmitting downlink control information, DCI, to the UE by the base station, wherein the UE is the target power parameter value for the SRS, the path loss compensation factor, and the closed loop power. A step comprising the closed-loop power control parameter value for the SRS so that the transmit power for the SRS in the first carrier can be determined based on the control parameter value.
Including
The power control method, wherein the first carrier is a carrier to which the physical uplink shared channel, PUSCH, is not transmitted. The step of transmitting the downlink control information, DCI, to the UE by the base station is
The first step of scrambling the power control parameters for the SRS based on the first radio network temporary identifier, RNTI, by the base station to generate power control signaling or cross-carrier power control signaling. RNTI of 1 is TPC-SRS-RNTI, step and
A step of transmitting the power control signaling or the cross-carrier power control signaling to the UE by the base station.
8. The method of claim 8 . The method according to claim 8 or 9 , wherein the SRS is configured periodically or aperiodically. The first RNTI is used to scramble or mask the power control parameters for the SRS, and the scrambled parameters are used within the physical layer signaling for display to the UE. The method according to any one of claims 9 to 10 , which is carried. When it is a device and is executed by an electronic device
Acquiring the radio resource control RRC signaling, said RRC signaling, including the target power parameter value for the sounding reference signal (SRS), and the path loss compensation factor.
To get the downlink control information, DCI,
Obtaining a closed-loop power control parameter value for the SRS based on the DCI and the first radio network temporary identifier, RNTI,
Determining the transmission power for the SRS in the first carrier based on the target power parameter value, the path loss compensation factor, and the closed loop power control parameter value.
Including an instruction to cause the device to perform
The first carrier is a carrier on which the physical uplink shared channel, PUSCH, is not transmitted. The device according to claim 12 , wherein the device is a chip. The device according to claim 12 or 13 , wherein the first carrier is a carrier to which SRS carrier switching is switched. Obtaining the closed-loop power control parameter value for the SRS based on the DCI and the first radio network temporary identifier is
Acquiring transmission power control (TPC) information from the DCI, the TPC information is scrambled information using the first RNTI, and the first RNTI is TPC-SRS-RNTI. Is, to get and
Analyzing and extracting the closed-loop power control parameter value for the SRS from the TPC information based on the first RNTI.
12. The apparatus according to any one of claims 12 to 14 . 12. The device of claim 12, wherein the first RNTI is used to scramble or mask the power control parameters for the SRS. When the instruction is executed by the electronic device
Determining the configuration of the SRS, wherein the configuration of the SRS is a periodic configuration of the SRS or an aperiodic configuration of the SRS.
Let the device do more
The UE determines the transmission power for the SRS in the first carrier based on the target power parameter value, the path loss compensation factor, and the closed loop power control parameter value.
Determining the transmission power for the SRS in the first carrier based on the target power parameter value, the path loss compensation factor, the closed loop power control parameter value, and the configuration of the SRS.
12. The apparatus according to claim 12 . It ’s a base station,
With one or more processors
Memory coupled to one or more processors, when executed by one or more processors
Determining the target power parameter value for the sounding reference signal, SRS, path loss compensation factor, and closed-loop power control parameter value for said SRS.
The radio resource control RRC signaling is to be transmitted to the user equipment, the UE, which provides the target power parameter value for the sounding reference signal (SRS) and the path loss compensation factor for the SRS. Including, sending and
The downlink control information, DCI, is to be transmitted to the UE, wherein the UE is based on the target power parameter value for the SRS, the path loss compensation factor, and the closed loop power control parameter value. And transmitting, including the closed-loop power control parameter value for the SRS so that the transmit power for the SRS in the first carrier can be determined.
Including an instruction to cause the base station to perform
The first carrier is a memory and a carrier to which the physical uplink shared channel, PUSCH, is not transmitted.
A base station. When the instruction is executed by the one or more processors
The first RNTI is to scramble the power control parameters for the SRS based on the first radio network temporary identifier, RNTI, to generate power control signaling or cross-carrier power control signaling, wherein the first RNTI is a TPC. -SRS-RNTI, scrambling and
Sending the power control signaling or the cross-carrier power control signaling to the UE,
18. The base station according to claim 18 , wherein the base station further performs the above. The base station according to claim 18 or 19 , wherein the SRS is configured periodically or aperiodically. The base station according to any one of claims 18 to 20 , wherein the first RNTI is used to scramble or mask the power control parameters for the SRS. It ’s a power control system.
A user device, a UE, which is configured to perform the method according to any one of claims 1 to 6 .
A base station configured to perform the method according to any one of claims 7 to 10 .
Including power control system. A computer-readable storage medium that, when executed by an electronic device, causes the device to perform the method according to any one of claims 1-7 . A computer-readable storage medium that, when executed by an electronic device, causes the device to perform the method according to any one of claims 8 to 11 . It is a user device (UE)
With one or more processors
A memory comprising an instruction to cause the UE to execute the method according to any one of claims 1 to 7 when executed by the one or more processors.
A user device.

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