WO2013155914A1

WO2013155914A1 - Method and device for power control information informing and power control

Info

Publication number: WO2013155914A1
Application number: PCT/CN2013/072939
Authority: WO
Inventors: 陈文洪; 高秋彬; 彭莹
Original assignee: 电信科学技术研究院
Priority date: 2012-04-17
Filing date: 2013-03-20
Publication date: 2013-10-24
Also published as: CN103379603A; CN103379603B

Abstract

Disclosed are a method and a device for power control information informing and power control, which relate to a wireless communication technology field and are used to solve the problem how to make a Sounding Reference Signal (SRS) sent by a terminal satisfy different measurement requirements. In this invention, after determining an SRS power control process used by a terminal, the base station informs the terminal of the SRS power control process used by the terminal, and the terminal determines the SRS uplink sending power based on an SRS power control parameter corresponding to the SRS power control process, and transmits the SRS according to the uplink sending power. With this scheme, the SRS sent by the terminal can satisfy different measurement requirements.

Description

Power control information notification and power control method and equipment This application is required to be submitted to the Chinese Patent Office on April 17, 2012, the application number is 201210113191.3, and the invention name is

The priority of the Chinese Patent Application for "Communication Information Notification and Power Control Method and Apparatus" is incorporated herein by reference in its entirety. The present invention relates to the field of wireless communications, and in particular, to a power control information notification and power control method and device. In the existing LTE-A (Long Term Evolution-Advanced) system, an SRS (Sounding Reference Signal) can be used for uplink channel shield measurement, thereby performing uplink scheduling, or The channel dissimilarity is used to acquire downlink channel information, thereby performing downlink scheduling and transmission. In a CoMP (Cooperative Multiple Point Transmission) system, the channel information that needs to be measured for uplink transmission and the channel information that needs to be obtained for downlink transmission are often different due to the independence of uplink and downlink transmission. Therefore, sounding is required. The set of measured transmission points is also different. For uplink transmission, usually the measurement points are relatively close transmission points, so the SRS transmission power does not need to be too high; if the measurement information is used for the selection of the downlink CoMP set, a larger range of transmission point measurement is required, and the required SRS is measured. The transmission power will also be higher.

RRH (Remote Radio Head), also known as RRU (Remote Radio Unit) or RRE (Remote Radio Unit), distributed antenna, etc., is a BBU (Base Band Unit). Processing unit) A separate RF unit. Usually RRH and BBU are placed in different geographical locations. The RRH includes a radio frequency circuit, an analog-to-digital (A/D) conversion module, a digital-to-analog (D/A) conversion module, and an optical transmission module. The RRH is connected to the BBU through optical fibers. A distributed RRH is a network form that utilizes RRH networking. The RRH is dispersed in a cell. Because the distance from the UE (User Equipment) is small, the terminal can provide high-constraint communication services. Since the data of all RRHs in a cell are processed centrally by the BBU, this brings about the possibility of efficient cooperation between RRHs. Therefore, distributed RRH becomes an important scene of CoMP research. The deployment of distributed RRH can be divided into two types according to the presence or absence of macro stations: no macro station and macro station, uplink transmission and downlink transmission in the RRH deployment scenario with macro station as shown in Figure la (different cell ID) and Figure lb ( The same cell ID) is shown. Among them, the scene of a macro station is generally based on the existing network to increase the RRH to meet the hotspot coverage of the local area. RRHs with macro stations do not need to cover all locations, so their geographic location is generally random (related to the location of the hotspot).

In UL (Uplink) CoMP transmission, the receiving end can simultaneously receive signals at multiple transmission points, and the detection performance is improved by the combination of the received signals. At this time, the SRS can be used for the detection of the uplink channel, on the one hand according to the channel. The strength determines the set of received transmission points, and on the other hand, performs scheduling according to the channel information, and determines the RI (Prior Indication, Identifier) I PQ (Principal Indicator Indicator) I CQI (Channel Quality Indicator) Measurement indicator). Since the transmission power of the PUSCH (Physical Uplink Shared Channel) is unique, generally only the nearest thousand transmission points are required for channel detection, and the transmission power of the SRS only needs to satisfy the measurement of these points. For example, in Figure la and Figure lb, only the last two RRHs are needed for sounding.

In DL (Downlink) CoMP transmission, the base station uses the measurement of the uplink SRS to obtain downlink channel information according to channel dissimilarity, and the channel information can be used for scheduling, determining the coordinated set, measurement set, transmission set, and frequency domain of the UE. The resource and CQI can also be used for CoMP transmission operations such as CS (Check Sum), CB (Cell Broadcast), and JP (Joint Predistortion) at the base station. Because the transmission power of different transmission points may be different, the coordinated set of UEs may cover a larger range and more transmission points. If SRS measurement is to be performed at these transmission points, SRS needs to be transmitted at a large transmission power. Launch to ensure the reliability of the measurement. For example, in Figure la, the macro station and all RRHs are in the cooperative set of UE1 and UE2, and SRS detection is performed.

There are two different types of SRS in the current standard: periodic SRS and aperiodic SRS. The former needs to be configured by the base station

The SRS sends the SRS periodically according to the configured information. The latter is triggered by the PDCCH (Physical Downlink Control Channel). After the trigger, the terminal sends the SRS only once. For aperiodic SRS, the base station can trigger the aperiodic SRS by aperiodic SRS trigger signaling in DCI (Downlink Control Information) format (format) 0/1A/2B/2C/4. Different acyclic SRSs triggered by different DCI formats can use different SRS parameter groups. These parameter groups are respectively configured by high-level signaling, and the parameter group includes parameters such as time-frequency resources and cyclic shifts used for transmitting the aperiodic SRS. . The correspondence between DCI format and parameter group is as follows:

Table 1 The uplink transmit power of the SRS is obtained by the following SRS transmit power calculation formula:

OFFSET,c (m) + 10 log _w (M _{SRS c} ) + P _o PUSCH'c (j) + a _c (j) - PL _c + f _c (i) Where 'MAX is the maximum transmit power of the UE' P _SRS ―. _FFSET,. 0) is an SRS transmission power adjustment value, and m=0 and m=l respectively indicate adjustment values of the periodic SRS and the aperiodic SRS, and are used to adjust the transmission power difference between the PUSCH and the SRS. The value range is determined by the high-level parameter Ks. When Ks=0, the step size is 1.5dB, the value range is [-10.5, 12], and when Ks=1.25, the step size is ldB, and the value range is [-3, 12], the value is notified by higher layer signaling; MSRS is the transmission bandwidth of SRS, P. ― _PUSeH C/) is the cell broadcast parameter P. ― _N . _Mnal ― _PUSeH 0) and the sum of the UE-specific high-level power control parameters P ₀ ^ _PUSCH (j), where ^ is the downlink path loss estimate, measured by the UE, and its value is the CRS of the downlink base station (Cell-specific Reference signal, cell-specific pilot signal) The ratio of the transmit power to the RSRP (Reference Signal Received Power) of the UE, /( ) is the closed-loop power control parameter, and the DCI (downlink Control Information) Information) format The TPC (Transmit Power Control) command in 0/4/3/3A is obtained. /( ) can be either an accumulated value or an absolute value. Among them, the parameters used for closed-loop power control are mainly ^ ^ CHC and / ( ). The former can perform quasi-static power control through high-level signaling, and the length is 4 bits, the range is [-7, 8], and the step size is ldB. The latter is notified by PDCCH signaling, which may be an accumulated value of the previous value, that is, /·) = / · - l) + _PRAOT , or may be an absolute value, that is, (/) = δ. The δ values obtained by the TPCs indicated in different DCI formats are different, as shown in Table 2 below:

Table 2 In order to meet different measurement needs, especially to meet the measurement requirements of DL CoMP, there are currently several SRS power control enhancement methods:

First, the SRS-specific closed-loop power control parameter _ra (/) is introduced. The corresponding SRS-specific TPC command can be used. The independent power adjustment is performed on the SRS, so as not to be affected by the PUSCH power control. At this point, the SRS transmit power calculation formula should be changed to:

(/M) + 101og ₁₀ ( _{SRS c} ) + _o

Second, another method that can be considered is to introduce a target power value of 0 _{SRS c} (j) similar to Po-P^cH^" ⁷ ') for _SRS , or to introduce SRS-specific similar to " _e /" The power control independent of the PUSCH is obtained. Here, the power control parameters dedicated to the SRS are exactly the same as the power control parameters corresponding to the PUSCH in the formula, but are configured by independent parameters.

Third, in order to adjust the downlink path loss measurement result to the target result, the path loss offset parameter may be introduced to adjust the current downlink path loss measurement result, and the adjusted SRS transmission power calculation formula is changed to:

(/M) + 101og ₁₀ ( _{SRS c} ) + _o

In summary, in the CoMP system, the uplink transmission and the downlink transmission have different requirements for the SRS transmission power, and how to meet different measurement requirements is a problem that needs to be solved at present. SUMMARY OF THE INVENTION Embodiments of the present invention provide a power control information notification and power control method and device, which are used to solve how a terminal sends a message.

SRS can meet the needs of different measurement needs.

A method for notifying power control information, the method comprising:

The base station determines an SRS power control process from the plurality of sounding reference signal SRS power control processes configured in advance for the terminal as the SRS power control process used by the terminal;

The base station notifies the SRS power control process used by the terminal through downlink signaling.

A power control method, the method comprising:

Receiving, by the terminal, a notification of the used SRS power control process sent by the base station;

The terminal acquires the SRS power control parameter corresponding to the SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.

a base station, the base station comprising:

a determining unit, configured to determine, according to a plurality of sounding reference signal SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal;

The notification unit is configured to notify the SRS power control process used by the terminal by using downlink signaling.

A terminal, the terminal comprising:

a receiving unit, configured to receive a notification of the used SRS power control process sent by the base station;

a power control unit, configured to acquire an SRS power control parameter corresponding to the SRS power control process, and determine an uplink transmit power of the SRS according to the SRS power control parameter; And a transmitting unit, configured to perform SRS transmission according to the uplink sending power.

In this solution, after determining the SRS power control process used by the terminal, the base station notifies the terminal of the SRS power control process used by the terminal, and the terminal determines the uplink sending of the SRS according to the SRS power control parameter corresponding to the SRS power control process. Power, and SRS transmission is performed according to the uplink transmission power. It can be seen that, by using the solution, the base station can determine that the terminal uses different SRS power control processes according to different measurement requirements, and notifies the terminal of the determined SRS power control process, so that the terminal can respond to the SRS according to the notified SRS power control process. The power control parameters perform power control of the SRS, so that the SRS sent by the terminal can meet different measurement requirements. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of uplink transmission and downlink transmission in an RRH scenario in the prior art;

Figure lb is a schematic diagram of uplink transmission and downlink transmission in another RRH scenario in the prior art;

2 is a schematic flowchart of a method according to an embodiment of the present invention;

3 is a schematic flowchart of another method according to an embodiment of the present invention;

4 is a schematic structural diagram of a device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another device according to an embodiment of the present invention. In order to enable the SRS sent by the terminal to meet different measurement requirements, the embodiment of the present invention provides a power control information notification and a power control method. In the method, the base station notifies the terminal of the SRS power control process, and the terminal The uplink transmission power of the SRS is determined according to the SRS power control parameter corresponding to the SRS power control process, and the SRS transmission is performed according to the uplink transmission power.

Referring to FIG. 2, a method for notifying power control information provided by a base station side according to an embodiment of the present invention includes the following steps:

Step 20: The base station determines, from the multiple SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal.

Step 21: The base station notifies the SRS power control process used by the terminal by using downlink signaling.

Further, before the step 20, the base station may configure multiple SRS power control processes for the terminal by using the high layer signaling, and each SRS power control process configured corresponds to a set of SRS power control parameters. The SRS power control parameter is the parameter used in the SRS transmit power calculation formula.

Specifically, the SRS power control parameter includes at least one of the following parameters:

SRS transmission power adjustment value P _SRS OFFSET,c \ ^m ) ',

The target power value used by PUSCH power control ^ _PUSCH . ( ') or SRS dedicated target power value ^ _{SRS c} *); Path loss compensation factor a _c used for PUSCH power control (J, or SRS-specific path loss compensation factor; path loss offset parameter

The configuration parameter of the reference signal used by the terminal for downlink path loss measurement; wherein, the configuration parameter of the reference signal used by the terminal for downlink path loss measurement may be an index corresponding to the reference signal (specific parameter information corresponding to each index is used by other The high-level signaling indication) may also be specific parameter information such as power, time-frequency resources, and the like of the reference signal;

PUSCH closed-loop power control parameters W or SRS-specific closed-loop power control parameters j^s (i).

Specifically, the SRS power control parameter corresponding to at least one SRS power control process of the multiple SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control, for example, the SRS function corresponding to the SRS power control process. PUSCH power control parameters and control preclude the use of the same ^ _PUSCH. (_/·), a _c (j) . PL _C and f _c {i) ; and/or,

The at least one SRS power control parameter corresponding to at least one of the multiple SRS power control processes configured by the base station is different from the corresponding parameter in the PUSCH power control, including all different or partially different.

Preferably, before the step 20, the base station may configure the priority of each SRS power control process in the multiple SRS power control processes to the terminal, or the base station and the terminal agree on the priority of each SRS power control process in the multiple SRS power control processes. . The base station may configure the priority of each SRS power control process in the multiple SRS power control processes to the terminal, or configure the multiple SRS power control processes to the terminal after the terminal is configured with the multiple SRS power control processes. Configure the priority of each SRS power control process in multiple SRS power control processes.

As an implementation manner, in step 20, the base station determines, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal, and the specific implementation is as follows:

The base station determines that the uplink channel information or the downlink channel information needs to be measured by using the SRS, and if the uplink channel information needs to be measured, determining the SRS power control process corresponding to the uplink transmission among the multiple SRS power control processes configured in advance for the terminal, The SRS power control process used by the terminal; if the downlink channel information needs to be measured, the SRS power control process corresponding to the downlink transmission in the plurality of SRS power control processes configured in advance for the terminal is determined, as the SRS used by the terminal. Power control process.

As another implementation manner, in step 20, the base station determines an SRS power control process as the SRS power control process used by the terminal from the multiple SRS power control processes configured in advance for the terminal, and the specific implementation is as follows: The SRS resource is used to determine an SRS power control process from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission; specifically, the base station may be configured for each The SRS resources are respectively determined from the SRS power control processes configured in advance for the terminal, and the SRS power control process is used as the SRS power control process used by the terminal to perform the SRS transmission by using the SRS resource; or, the base station is a terminal in advance. The SRS power control process is determined in the multiple SRS power control processes configured as the SRS power control process used by the terminal to perform SRS transmission using each SRS resource.

Correspondingly, in step 21, the base station notifies the SRS power control process used by the terminal by using downlink signaling, and the specific implementation is as follows: The base station notifies the terminal to use the configured SRS resource by using the independent information bits in the DCI (Downlink Control Information) of the PDCCH (Physical Uplink Control CHannel). The SRS power control process used in SRS transmission. Here you can use one signaling or you can use multiple signaling notifications.

In another embodiment, in step 20, the base station determines an SRS power control process as the SRS power control process used by the terminal from multiple SRS power control processes configured in advance for the terminal, and the specific implementation is as follows: A plurality of SRS power control processes configured by the terminal determine an SRS power control process to be used as a SRS power control process used by the terminal for SRS transmission; correspondingly, in step 21, the base station notifies the terminal of the SRS by using downlink signaling The power control process is implemented as follows: The base station notifies the terminal to use the SRS power control process when performing SRS transmission through high-level signaling or independent information bits in the DCI of the PDCCH. This embodiment is independent of determining that the SRS power control process is independent of SRS resources.

Specifically, the SRS resources include, but are not limited to, a time-frequency resource of the SRS, a cyclic shift, and an SRS port. SRS transmissions include periodic SRS transmissions and/or aperiodic SRS transmissions.

Further, when the base station notifies the SRS power control process through the independent information bits in the DCI of the PDCCH, and the SRS transmission includes the aperiodic SRS transmission, the aperiodic SRS transmission is the aperiodic SRS transmission triggered by the DCI or all aperiodic SRS. transmission.

As another implementation manner, in step 20, the base station determines, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal, and the specific implementation is as follows:

The base station determines, according to the SRS parameter group corresponding to the DCI format that can trigger the aperiodic SRS transmission, the SRS function used by the SRS power control process as the terminal for the aperiodic SRS transmission from the multiple SRS power control processes configured in advance for the terminal. Specifically, the base station may determine, according to each SRS parameter group corresponding to the DCI format that can trigger the aperiodic SRS transmission, one SRS power control process from the multiple SRS power control processes configured in advance for the terminal as the terminal. The SRS power control process used in the periodic SRS transmission; or, the base station determines one SRS function from multiple SRS power control processes configured for the terminal in advance for all SRS parameter groups corresponding to the DCI format capable of triggering the aperiodic SRS transmission. The SRS power control process used by the control process as a terminal for aperiodic SRS transmission.

Correspondingly, in step 21, the base station notifies the SRS power control process used by the terminal by using downlink signaling, and the specific implementation is as follows:

The base station notifies the SRS power control process used by the terminal to perform the aperiodic SRS transmission associated with the SRS parameter group through the high layer signaling.

Specifically, the aperiodic SRS transmission is an aperiodic SRS transmission or all aperiodic SRS transmission triggered by a DCI format corresponding to the SRS parameter group.

Here, the correspondence between the SRS parameter group and the DCI format can be seen in Table 1. The SRS parameter group includes parameters such as time-frequency resources and cyclic shifts used for transmitting the non-periodic SRS.

As a further implementation manner, in step 20, the base station determines from multiple SRS power control processes configured in advance for the terminal. Set an SRS power control process as the SRS power control process used by the terminal. The specific implementation is as follows:

The base station determines, by using a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal for aperiodic SRS transmission;

The base station notifies the SRS power control process used by the terminal to perform the aperiodic SRS transmission by using the trigger bit of the aperiodic SRS in the DCI of the PDCCH, where the indication information of the SRS power control process and the trigger information of the aperiodic SRS are jointly encoded. .

Specifically, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.

Referring to FIG. 3, the power control method provided by the terminal side of the present invention includes the following steps: Step 30: The terminal receives a notification of the used SRS power control process sent by the base station;

Step 31: The terminal acquires the SRS power control parameter corresponding to the SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.

Further, before the terminal receives the notification of the used SRS power control process sent by the base station, the terminal receives multiple SRS power control processes configured by the base station through the high layer signaling, and each SRS power control process configured corresponds to a set of SRS functions. Control parameters.

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The target power value P _{0 PUSCH c} (j) used by the physical uplink shared channel PUSCH power control or the target power value 专用 dedicated to the SRS. — _SRS,. 0) ;

The path loss compensation factor oc _c ( ) used for PUSCH power control or the path loss compensation factor of the SRS is ^asRS 'person ^j 、; path loss offset parameter

Specifically, the SRS power control parameter corresponding to at least one SRS power control process of the multiple SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control; and/or,

The at least one SRS power control parameter corresponding to at least one of the multiple SRS power control processes configured by the base station is different from the corresponding parameter in the PUSCH power control.

As an implementation manner, in step 30, the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows: The terminal receives the notification of the SRS power control process used by the base station by using the high-level signaling or the independent information bits in the DCI of the PDCCH, and the transmitted terminal uses the configured SRS resource to perform SRS transmission.

Correspondingly, in step 31, the terminal performs SRS transmission according to the uplink transmission power, and the specific implementation is as follows: The terminal performs periodic SRS transmission and/or aperiodic SRS transmission on the SRS resource.

As another implementation manner, in step 30, the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows: The terminal receives the independent information bit sent by the base station through the high layer signaling or the PDCCH, and sends the information. The notification of the SRS power control process used by the terminal for SRS transmission. Correspondingly, in step 31, the terminal performs periodic SRS transmission and/or aperiodic SRS transmission according to the uplink transmission power.

Specifically, the SRS resources include, but are not limited to, a time-frequency resource of the SRS, a cyclic shift, and an SRS port.

Further, the terminal receives the independent information bits in the DCI of the PDCCH through the PDCCH, and the transmitting terminal performs the

When the SRS transmission process is used for notification of the SRS power control process, and the SRS transmission includes the aperiodic SRS transmission, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.

As another implementation manner, in step 30, the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows:

The terminal receives the SRS power control process used by the base station to perform the aperiodic SRS transmission associated with the SRS parameter group corresponding to the DCI format capable of triggering the aperiodic SRS.

Correspondingly, in step 31, the specific implementation of the SRS power control parameter corresponding to the SRS power control process is as follows: After receiving the DCI triggered by the base station and triggering the aperiodic SRS transmission, the terminal responds according to the DCI format of the received DCI. The SRS parameter group obtains the SRS power control process associated with the SRS parameter group corresponding to the DCI format; and obtains the SRS power control parameter corresponding to the SRS power control process;

The terminal performs SRS transmission according to the uplink transmission power, and the specific implementation is as follows:

The terminal performs the aperiodic SRS transmission triggered by the DCI format corresponding to the SRS parameter group according to the uplink transmission power, or performs all aperiodic SRS transmission according to the uplink transmission power.

As a further implementation manner, in step 30, the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows:

The terminal receives the trigger bit of the aperiodic SRS in the DCI of the PDCCH by the base station, and the notification of the SRS power control process used by the transmitting terminal to perform the aperiodic SRS transmission, where the indication information of the SRS power control process and the aperiodic SRS are The trigger information is jointly encoded.

Correspondingly, in step 31, the terminal performs SRS transmission according to the uplink transmission power, and the implementation is as follows: The terminal performs the aperiodic SRS transmission triggered by the DCI according to the uplink transmission power, or performs all aperiodic according to the uplink transmission power. SRS transmission.

In step 31, when determining the uplink transmit power of the SRS according to the SRS power control parameter, the terminal specifically introduces the SRS power control parameter into the SRS transmit power calculation formula, and calculates the SRS according to the SRS transmit power calculation formula. Line transmit power.

When the terminal determines the uplink transmit power of the SRS according to the SRS power control parameter, if the SRS power control parameter includes the configuration parameter of the reference signal used by the UE for the downlink path loss measurement, the configuration parameter is required to be based on the reference signal. The downlink path loss value PL is measured, and the uplink transmission power of the SRS is determined according to the measured downlink path loss value PL.

In particular, if the same SRS resource corresponds to multiple different SRS power control processes, the terminal and the base station need to predetermine a method for determining the used SRS power control process, and the method includes:

The SRS power control process with a higher uplink transmit power of the corresponding SRS; or

Susing the SRS power control process with a lower uplink transmit power of the corresponding SRS; or

The base station and the UE agree on the priority of the multiple SRS power control processes, and use the higher priority SRS power control process, that is, the terminal selects the higher priority according to the priority of multiple SRS power control processes pre-agreed with the base station. The SRS power control process is used as the current SRS power control process; or

The terminal selects a higher priority SRS power control process as the current SRS power control process according to the priority of the multiple SRS power control processes that are configured in advance by the base station; or

The terminal does not perform SRS transmission on the corresponding SRS resource.

The present invention will be described below in conjunction with specific embodiments:

Embodiment 1:

Step 1: The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters. The UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process. Specifically, the base station configures two SRS power control processes for the UE, and the SRS power control parameter corresponding to one SRS power control process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol. The SRS transmission power calculation formula, the SRS power control parameter corresponding to another SRS power control process (process 2) includes the following parameters different from the process 1:

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The closed loop power control parameter (i) dedicated to SRS replaces f _c (i);

Other SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling. The base station and the terminal agree that if the same SRS resource corresponds to two different SRS power control processes, the SRS power control process with the higher uplink transmit power of the corresponding SRS is used.

Step 2: The base station is configured as an SRS resource, and an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission; The high-level signaling notifies the SRS power control process used by the terminal to perform the SRS transmission by using the configured SRS resource. Specifically, the base station notifies the UE to use the configured one-cycle SRS resource by using the high-layer signaling (including the SRS period and the subframe offset configuration). ), the SRS power control process used for periodic SRS transmission is SRS power control process 1, and Using another configured SRS resource (including the SRS period and the subframe offset configuration), the SRS power control process used for the periodic SRS transmission is the SRS power control process 2;

Step 3: The UE receives a notification of the SRS power control process used by the UE to perform SRS transmission by using the configured SRS resource by using the uplink signaling.

Step 4: The UE obtains the SRS power control parameter corresponding to the notified SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.

When performing periodic SRS transmission after receiving the notification from the base station, the UE uses the corresponding SRS power control process to perform SRS power control on different SRS resources and subframe offset configuration corresponding SRS resources. Specifically, for the SRS resource corresponding to the SRS period and the subframe offset configuration, the UE determines the SRS power control process corresponding to the SRS resource, and the SRS power control parameter corresponding to the SRS power control process is substituted into the SRS transmission power calculation formula. The uplink transmit power of the SRS, thereby performing periodic SRS transmission on the SRS resource.

If the two SRS resources have overlapping parts, the coincident SRS resources will correspond to the two SRS power control processes at the same time. In this case, the SRS transmission with the corresponding uplink transmission power should be used for SRS transmission on the coincident SRS resources. Control process.

Embodiment 2:

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The closed loop power control parameter (i) dedicated to SRS replaces f _c (i);

The index of the reference signal used by the UE for downlink path loss measurement; (the specific parameter information corresponding to the index is configured by other high layer signaling);

Step 2: The base station is configured as an SRS resource, and an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission; An independent information bit in the DCI of the PDCCH, and notifying the SRS power control process used by the UE to perform SRS transmission using the configured SRS resource;

Specifically, the independent information bits in the DCI are 1 information bit, and the SRS power control process can be used for all non- Periodic SRS transmission (until there is a next indication to change this configuration).

Step 3: The UE receives the notification that the base station uses the independent information bits in the DCI, and the sent UE uses the configured SRS resource to perform the SRS transmission process.

Specifically, if the notified SRS power control process is process 1, the corresponding SRS power control mechanism and parameters are the same as the SRS power control mechanism and parameters in the current protocol; if process 2 is used, the pre-configured UE is used to perform the next The reference signal used for the path loss measurement obtains the downlink path loss value, and then the SRS transmission power adjustment value P _{SRS 0FFSET c} (m) and (i) corresponding to the process 2 and the obtained path loss value are substituted into the SRS transmission power. The calculation formula obtains the uplink transmission power of the SRS, and performs aperiodic SRS transmission on the corresponding SRS resource.

If the aperiodic SRS transmission triggered by two or more DCIs corresponds to the same SRS resource, and the SRS power control process used by the non-periodic SRS transmission is the same according to the base station, the SRS power control process is used. Perform the power control of the SRS. If the power control process used by the aperiodic SRS is different according to the indication of the base station, when the aperiodic SRS transmission is performed on the corresponding SRS resource, the SRS power control process with the corresponding higher uplink transmit power should be used for power. control.

Embodiment 3:

Step 1: The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters. The UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process. Specifically, the base station configures two SRS power control processes for the UE, and the SRS power control parameter corresponding to one SRS power control process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol. The SRS transmission power calculation formula, the SRS power control parameters corresponding to other SRS power control processes (process 2) include the following parameters different from the process 1: SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The closed loop power control parameter (i) dedicated to SRS replaces f _c (i);

Other SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling. The base station also agrees with the UE on the priority of each SRS power control process. For example, the priority of process 2 is higher than that of process 1. Step 2: The base station uses an SRS parameter group corresponding to the DCI format capable of triggering the aperiodic SRS transmission, and determines an SRS power control process from the plurality of SRS power control processes configured in advance for the terminal to perform the aperiodic SRS transmission. The SRS power control process is used to notify the UE of the SRS power control process used for the aperiodic SRS transmission for the SRS parameter group through the high layer signaling; the UE receives the notification.

Specifically, the base station determines an SRS power control process for each SRS parameter group corresponding to the DCI format that triggers the aperiodic SRS transmission, and determines the SRS power control process corresponding to the SRS parameter group by using 1-bit high-layer signaling. 1 or process 2) Notify the UE.

Step 3: The base station triggers the UE to perform aperiodic SRS transmission by using DCI of the PDCCH. Step 4: After receiving the DCI of the base station that triggers the aperiodic SRS transmission, the UE determines the SRS parameter group corresponding to the DCI format of the DCI, and then determines the SRS power control process corresponding to the SRS parameter group according to the notification received in step 2. Obtaining an SRS power control parameter corresponding to the SRS power control process, determining an uplink transmit power of the SRS according to the SRS power control parameter, and performing SRS transmission according to the uplink transmit power.

Specifically, the SRS power control parameter corresponding to the SRS power control process is substituted into the SRS transmission power calculation formula, and the uplink transmission power of the SRS is obtained, and the aperiodic SRS transmission triggered by the DCI is performed according to the uplink transmission power.

If the aperiodic SRS transmission triggered by the two or more DCIs corresponds to the same SRS resource, and the SRS power control process used by the aperiodic SRS transmissions is the same according to the base station indication, the SRS power control process is used to perform the SRS. Power control. If the SRS power control process used by these aperiodic SRS transmissions is different according to the base station indication, when the aperiodic SRS transmission is performed on the corresponding SRS resource, the SRS power control process with higher priority should be used for power control. . For example, if both process 1 and process 2 are triggered in the same subframe and the same SRS resource is used, the SRS power control parameter corresponding to process 2 should be used for SRS power control.

Embodiment 4:

Step 1: The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters. The UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process. The power control parameters; Specifically, the base station configures three SRS power control processes for the UE, and the SRS power control parameter corresponding to one power control SRS process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol. The SRS transmission power calculation formula, the SRS power control parameters corresponding to other processes (processes 2 and 3) include the following parameters different from the process 1: SRS transmission power adjustment value P _SRS OFFSET, c \ ^m ) ',

Target power P dedicated to SRS. ―^ _e O) instead of P. ― _{PUSC e} /);

The closed loop power control parameter (i) dedicated to SRS replaces f _c (i);

Other SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling. The base station also agrees with the UE that if the same SRS resource corresponds to two different SRS power control processes, the SRS power control process with the higher uplink transmit power of the corresponding SRS is used.

Step 2: The base station determines, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal for aperiodic SRS transmission; and passes the aperiodic in the DCI of the PDCCH.

The triggering bit of the SRS notifies the UE of the SRS power control process used for the aperiodic SRS transmission, where the indication information of the SRS power control process is jointly encoded with the trigger information of the aperiodic SRS.

Specifically, the base station jointly encodes the aperiodic trigger information and the indication information of the SRS power control process, and triggers the UE to perform the aperiodic SRS transmission by using the 2-bit acyclic SRS trigger bit in the DCI, and indicates the used

SRS power control process. The indication contents of the 2-bit trigger bits are as follows: Indication field indication content

00 does not trigger aperiodic SRS transmission

01 Triggering aperiodic SRS transmission and using SRS power control process 1

10 Trigger aperiodic SRS transmission and use SRS power control process 2

11 Trigger aperiodic SRS transmission and use SRS power control process 3

Step 3: The UE receives the notification of the SRS power control process used by the UE to perform the aperiodic SRS transmission through the trigger bit of the aperiodic SRS in the DCI, according to the SRS power control process included in the trigger bit. The instructions are known to the SRS power control process used. The UE obtains the SRS power control parameter corresponding to the SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs the aperiodic SRS transmission according to the uplink sending power.

If the aperiodic SRS transmissions triggered by the two or more DCIs correspond to the same SRS resources, and the SRS power control processes used by the aperiodic SRS transmissions are different according to the base station indication, the non-synchronous SRS resources are different on the corresponding SRS resources. During periodic SRS transmission, the SRS power control process with the corresponding SRS uplink transmission power is used for power control. For example, if both process 1 and process 3 are triggered in the same subframe and the same SRS resource is used, if the uplink transmission power of the SRS obtained according to the SRS power control parameter corresponding to process 3 is large, the process should be used. 3 corresponding SRS power control parameters for SRS power control.

Referring to FIG. 4, an embodiment of the present invention provides a base station, where the base station includes:

a determining unit 40, configured to determine, according to a plurality of sounding reference signal SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal;

The notification unit 41 is configured to notify the SRS power control process used by the terminal by using downlink signaling.

Further, the base station further includes:

The first configuration unit 42 is configured to configure multiple SRSs for the terminal by using high layer signaling before determining that one SRS power control process is used as the SRS power control process used by the terminal from the multiple SRS power control processes configured in advance for the terminal. The power control process, each SRS power control process configured corresponds to a set of SRS power control parameters.

Further, the SRS power control parameter includes at least one of the following parameters:

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

Target power value P _{0 PUSCH c} (j) used by physical uplink shared channel PUSCH power control or target power value dedicated to SRS);

The path loss compensation factor a _c ij used for PUSCH power control, or the path loss compensation factor oc^ J dedicated to SRS; Road loss offset parameter

a configuration parameter of a reference signal used by the terminal for downlink path loss measurement;

Further, the SRS power control parameter corresponding to at least one SRS power control process of the multiple SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control; and/or,

Further, the base station further includes:

The second configuration unit 43 is configured to configure, to the terminal, a priority of each SRS power control process in the multiple SRS power control processes, or the base station and the terminal appoint a priority of each SRS power control process in the multiple SRS power control processes level.

Further, the determining unit 40 is configured to:

For the configured SRS resource, an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission;

The notification unit 41 is configured to:

Through the high-level signaling or the physical downlink control channel, the downlink information of the PDCCH, the independent information bits in the DCI, informs the terminal of the SRS power control process used when the SRS resource is used for the SRS transmission.

Further, the determining unit 40 is configured to:

Determining an SRS power control process used by the SRS power control process as a terminal for performing SRS transmission from a plurality of SRS power control processes configured in advance for the terminal;

The notifying unit 41 is configured to: notify the terminal to use the SRS power control process when performing SRS transmission by using the high-level signaling or the independent information bits in the DCI of the PDCCH.

Further, the SRS resource includes: a time-frequency resource of the SRS, a cyclic shift, and an SRS port.

Further, the SRS transmission includes periodic SRS transmission and/or aperiodic SRS transmission.

Further, when the notification unit 41 notifies the SRS power control process by the independent information bits in the DCI of the PDCCH, and the SRS transmission includes the aperiodic SRS transmission, the aperiodic SRS transmission is the aperiodic SRS triggered by the DCI. Transmission or all aperiodic SRS transmissions.

Further, the determining unit 40 is configured to:

For the SRS parameter group corresponding to the DCI format that can trigger the aperiodic SRS transmission, determine the SRS function used by the SRS power control process as the terminal for the aperiodic SRS transmission from the multiple SRS power control processes configured in advance for the terminal. Control process

The notification unit 41 is configured to:

The SRS power control process used by the terminal to perform the aperiodic SRS transmission associated with the SRS parameter group is notified by the high layer signaling. Further, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by a DCI format corresponding to the SRS parameter group or all aperiodic SRS transmissions.

Further, the determining unit 40 is configured to:

Determining an SRS power control process used by the SRS power control process as a terminal for non-periodic SRS transmission from a plurality of SRS power control processes configured in advance for the terminal;

The notification unit 41 is configured to:

The triggering bit of the aperiodic SRS in the DCI of the PDCCH is used to notify the terminal of the SRS power control process used for the aperiodic SRS transmission, where the indication information of the SRS power control process is jointly encoded with the trigger information of the aperiodic SRS.

Further, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.

Referring to FIG. 5, an embodiment of the present invention provides a terminal, where the terminal includes:

The receiving unit 50 is configured to receive, by the base station, a notification of the used SRS power control process;

The power control unit 51 is configured to obtain an SRS power control parameter corresponding to the SRS power control process, and determine an uplink transmit power of the SRS according to the SRS power control parameter;

The transmitting unit 52 is configured to perform SRS transmission according to the uplink sending power.

Further, the receiving unit 50 is further configured to:

Before receiving the notification of the used SRS power control process sent by the base station, the receiving multiple SRS power control processes configured by the base station through the high layer signaling, each SRS power control process configured corresponds to a set of SRS power control parameters.

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The target power value P used by the physical uplink shared channel PUSCH power control. _{PUSCH c} (j) or SRS dedicated target power value);

Path loss compensation factor a _c used for PUSCH power control (J, or SRS-specific path loss compensation factor; path loss offset parameter

Further, the base station is configured by at least one of the multiple SRS power control processes configured by the terminal, corresponding to the SRS power control process.

SRS power control parameters, which are the same as corresponding parameters in PUSCH power control; and / or,

Further, the power control unit 51 is configured to:

When the SRS power control parameter includes a configuration parameter of a reference signal used by the terminal for downlink path loss measurement, the root According to the configuration parameter of the reference signal used for downlink path loss measurement, the downlink loss value is measured based on the reference signal, and the uplink transmission power of the SRS is determined according to the measured downlink path loss value.

Further, the receiving unit 50 is configured to:

Receiving, by the base station, the notification information of the SRS power control process used by the transmitting terminal to perform SRS transmission by using the configured SRS resource through the high-level signaling or the independent information bit in the DCI of the PDCCH;

The transmission unit 52 is used to:

Periodic SRS transmission and/or aperiodic SRS transmission are performed on the SRS resource.

Further, the receiving unit 50 is configured to:

Receiving, by the base station, the notification information of the SRS power control process used by the terminal to perform SRS transmission through the high-level signaling or the independent information bits in the DCI of the PDCCH;

The transmitting unit 52 is configured to: the terminal perform periodic SRS transmission and/or aperiodic SRS transmission according to the uplink transmission power.

Further, when the receiving unit 50 receives the notification that the base station uses the independent information bits in the DCI of the PDCCH, the transmitting terminal performs the SRS transmission process, and the SRS transmission includes the aperiodic SRS transmission. The aperiodic SRS transmission is an aperiodic SRS transmission or all aperiodic SRS transmission triggered by the DCI.

Further, the receiving unit 50 is configured to:

Receiving an SRS power control process used by the base station to perform aperiodic SRS transmission associated with the SRS parameter group and sent by the high layer signaling;

The power control unit 51 is configured to: receive, by the base station, a DCI that triggers aperiodic SRS transmission, and obtain an SRS power control process associated with the SRS parameter group according to the SRS parameter group corresponding to the DCI format of the DCI; And obtaining the SRS power control parameter corresponding to the SRS power control process;

The transmission unit 52 is used to:

Performing aperiodic SRS transmission triggered by the DCI format corresponding to the SRS parameter group according to the uplink transmission power, or performing all aperiodic SRS transmission according to the uplink transmission power.

Further, the receiving unit 50 is configured to:

Receiving, by the base station, a trigger bit of the aperiodic SRS in the DCI of the PDCCH, and the notification of the SRS power control process used by the transmitting terminal to perform the aperiodic SRS transmission, where the indication information of the SRS power control process and the trigger of the aperiodic SRS are triggered Information is jointly encoded;

The transmission unit 52 is used to:

Performing the aperiodic SRS transmission triggered by the DCI according to the uplink transmission power, or performing all aperiodic SRS transmission according to the uplink transmission power. The power control unit 51 is further configured to:

If the same SRS resource corresponds to multiple different SRS power control processes, the priority of the multiple SRS power control processes pre-configured by the base station is selected, and the SRS power control process with higher priority is selected as the current SRS power control process. Process; or,

Selecting a higher priority SRS power control process as the current SRS power control process according to the priority of the multiple SRS power control processes that are pre-agreed with the base station; or

SRS transmission is not performed on the SRS resource.

In summary, the beneficial effects of the present invention include:

In the solution provided by the embodiment of the present invention, after determining the SRS power control process used by the terminal, the base station notifies the terminal of the SRS power control process used by the terminal, and the terminal only participates in the SRS power control corresponding to the SRS power control process. The parameter determines the uplink transmit power of the SRS, and performs SRS transmission according to the uplink transmit power. It can be seen that, by using the solution, the base station can determine that the terminal uses different SRS power control processes according to different measurement requirements, and notifies the terminal of the determined SRS power control process, so that the terminal can respond to the SRS according to the notified SRS power control process. The power control parameters perform power control of the SRS, so that the SRS sent by the terminal can meet different measurement requirements.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

A method for notifying power control information, characterized in that the method comprises:

The method according to claim 1, wherein before the base station determines an SRS power control process as the SRS power control process used by the terminal from the plurality of SRS power control processes configured in advance for the terminal, the method further includes: The base station configures multiple SRS power control processes for the terminal through high-level signaling, and each SRS power control process configured corresponds to a set of SRS power control parameters.

3. The method of claim 2, wherein the SRS power control parameter comprises at least one of the following parameters:

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The target power value P used by the physical uplink shared channel PUSCH power control. _{PUS (3⁄4e} /) or SRS dedicated target power value);

Path loss compensation factor a _c used for PUSCH power control (J, or SRS-specific path loss compensation factor (Χ { ; path loss offset parameter

The method according to claim 2, wherein the SRS power control parameter corresponding to at least one of the plurality of SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control. ; and / or,

The method according to claim 1, wherein before the base station determines an SRS power control process from the plurality of SRS power control processes configured in advance for the terminal as the SRS power control process used by the terminal, the method further includes: The base station configures the priority of each SRS power control process in the multiple SRS power control processes to the terminal, or the base station and the terminal agree on the priority of each SRS power control process in the multiple SRS power control processes.

The method according to any one of claims 1-5, wherein the base station determines an SRS power control process as the SRS function used by the terminal from a plurality of SRS power control processes configured in advance for the terminal. The control process includes: the base station is a configured SRS resource, and an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission The base station notifies the terminal of the SRS power control process by using the downlink signaling, and the method includes: the base station notifying the terminal to use the configured information by using the high-level signaling or the independent information bit in the downlink control information DCI of the physical downlink control channel PDCCH SRS resources for SRS The SRS power control process used during transmission; or,

The SeNB determines an SRS power control process as the SRS power control process used by the terminal from the multiple SRS power control processes configured in advance for the terminal, and specifically includes: the base station is configured from multiple SRS power control processes configured in advance for the terminal. Determining an SRS power control process as an SRS power control process used by the terminal to perform SRS transmission; the base station notifying the SRS power control process used by the terminal by using the downlink signaling, specifically: the base station adopts high layer signaling or PDCCH The independent information bits in the DCI inform the terminal of the SRS power control process used for SRS transmission.

The method according to claim 6, wherein the SRS resource comprises: a time-frequency resource of an SRS, a cyclic shift, and an SRS port.

The method according to claim 6, wherein when the base station notifies the SRS power control process through independent information bits in the DCI of the PDCCH, and the SRS transmission includes aperiodic SRS transmission, the aperiodic SRS transmission is The aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.

The method according to any one of claims 1-5, wherein the base station determines an SRS power control process as the SRS function used by the terminal from a plurality of SRS power control processes configured in advance for the terminal. The control process includes: performing, by the base station, an SRS parameter group corresponding to the DCI format that can trigger the aperiodic SRS transmission, and determining an SRS power control process from the multiple SRS power control processes configured in advance for the terminal as the terminal for performing the aperiodic SRS transmission. The SRS power control process used at the time;

The base station notifies the SRS power control process used by the terminal by using downlink signaling, which specifically includes:

The base station notifies the SRS power control process used by the terminal to perform the aperiodic SRS transmission associated with the SRS parameter group by using the high layer signaling;

The aperiodic SRS transmission is an aperiodic SRS transmission or all aperiodic SRS transmission triggered by the DCI format corresponding to the SRS parameter group.

The method according to any one of claims 1-5, wherein the base station determines an SRS power control process as the SRS function used by the terminal from a plurality of SRS power control processes configured in advance for the terminal. The control process specifically includes: the SRS power control process used by the base station to determine an SRS power control process as a terminal for performing aperiodic SRS transmission from a plurality of SRS power control processes configured in advance for the terminal;

The base station notifies the SRS power control process used by the terminal to perform the aperiodic SRS transmission by using the trigger bit of the aperiodic SRS in the DCI of the PDCCH, where the indication information of the SRS power control process and the trigger information of the aperiodic SRS are jointly encoded. The aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions after the trigger.

11. A power control method, the method comprising:

The terminal acquires an SRS power control parameter corresponding to the SRS power control process, and determines an SRS according to the SRS power control parameter. The uplink transmission power is transmitted, and the SRS transmission is performed according to the uplink transmission power.

The method according to claim 11, wherein before the terminal receives the notification of the used SRS power control process sent by the base station, the method further includes:

The terminal receives multiple SRS power control processes configured by the base station through the high layer signaling, and each SRS power control process configured corresponds to a set of SRS power control parameters.

13. The method of claim 12, wherein the SRS power control parameter comprises at least one of the following parameters:

SRS transmission power adjustment value P _SRS OFFSET.c ^m ) '

The target power value P used by the physical uplink shared channel PUSCH power control. _{PUSCH c} (j) or SRS dedicated target power value ^);

The method according to claim 13, wherein the SRS power control parameter corresponding to at least one of the plurality of SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control. ; and / or,

The method according to claim 13, wherein when the SRS power control parameter includes a configuration parameter of a reference signal used by the terminal for downlink path loss measurement, the terminal determines an uplink of the SRS according to the SRS power control parameter. Transmit power, including:

The terminal performs downlink path loss value measurement based on the reference signal according to the configuration parameter of the reference signal used for downlink path loss measurement, and determines the uplink transmission power of the SRS according to the measured downlink path loss value.

The method according to any one of the preceding claims, wherein the receiving, by the terminal, the notification of the used SRS power control process sent by the base station, specifically: the receiving the base station by using the high layer signaling or the PDCCH The independent information bit in the DCI, the sending terminal uses the configured SRS resource to perform the SRS power control process notification when the SRS transmission is performed; the SRS transmission according to the uplink sending power, specifically includes: the terminal follows the uplink Transmitting power performs periodic SRS transmission and/or aperiodic SRS transmission on the SRS resource; or

The receiving, by the terminal, the notification of the used SRS power control process sent by the base station, specifically includes: the terminal receiving the SRS used by the base station to perform SRS transmission by using the high-level signaling or the independent information bits in the DCI of the PDCCH. The SRS transmission is performed according to the uplink transmission power, and the method includes: the terminal performing periodic SRS transmission and/or aperiodic SRS transmission according to the uplink transmission power.

The method according to claim 16, wherein the SRS resource comprises: a time-frequency resource of an SRS, a cyclic shift, and an SRS port.

The method according to claim 16, wherein the terminal receives a notification that the base station uses the independent information bits in the DCI of the PDCCH, and the transmitted terminal performs the SRS transmission process, and the When the SRS transmission includes an aperiodic SRS transmission, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions after the trigger.

The method according to any one of claims 11-15, wherein the receiving, by the terminal, the notification of the used SRS power control process sent by the base station, specifically includes:

The terminal receives the SRS power control process used by the base station to perform the aperiodic SRS transmission associated with the SRS parameter group, which is sent by the base station;

The acquiring, by the terminal, the SRS power control parameter corresponding to the SRS power control process, specifically includes:

The terminal receives the DCI that is sent by the base station and triggers the aperiodic SRS transmission, and obtains the SRS power control process associated with the SRS parameter group according to the SRS parameter group corresponding to the DCI format of the DCI; and acquires the SRS power control process corresponding to the SRS SRS power control parameters;

The performing the SRS transmission according to the uplink sending power includes:

The method according to any one of claims 11 to 15, wherein the receiving, by the terminal, the notification of the used SRS power control process sent by the base station, specifically includes:

The terminal receives the trigger bit of the aperiodic SRS in the DCI of the PDCCH by the base station, and the notification of the SRS power control process used by the transmitting terminal to perform the aperiodic SRS transmission, where the indication information of the SRS power control process and the aperiodic SRS are The trigger information is jointly encoded; the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions after the triggering;

The terminal performs the aperiodic SRS transmission triggered by the DCI according to the uplink transmission power, or performs all aperiodic SRS transmission according to the uplink transmission power.

The method according to any one of claims 11 to 15, wherein if the same SRS resource corresponds to a plurality of different SRS power control processes, the terminal resides in the plurality of SRS power control pre-configured by the base station. Priority of the process, selecting a higher priority SRS power control process as the current SRS power control process; or

The terminal selects a higher priority SRS power control process as the current SRS power control process according to the priority of the multiple SRS power control processes that are pre-agreed by the base station; or

The terminal does not perform SRS transmission on the SRS resource.

22. A base station, the base station comprising: a determining unit, configured to determine, according to a plurality of sounding reference signal SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal;

The base station according to claim 22, wherein the base station further comprises:

a first configuration unit, configured to configure, by using high layer signaling, multiple SRS functions for the terminal before determining an SRS power control process as the SRS power control process used by the terminal from the multiple SRS power control processes configured in advance for the terminal The control process, each SRS power control process configured corresponds to a set of SRS power control parameters.

The base station according to claim 23, wherein the SRS power control parameter comprises at least one of the following parameters:

SRS transmission power adjustment value P _{SRS 0FFSET e} (m);

a second configuration unit, configured to configure, to the terminal, a priority of each SRS power control process in the multiple SRS power control processes, or the base station and the terminal agree on a priority of each SRS power control process in the multiple SRS power control processes .

The base station according to any one of claims 22-25, wherein the determining unit is configured to: determine, for the configured SRS resource, one SRS function from a plurality of SRS power control processes configured in advance for the terminal The control process is used as an SRS power control process used by the terminal to perform SRS transmission by using the SRS resource. The notification unit is configured to: notify, by using high layer signaling or a downlink information of a downlink control information DCI of the physical downlink control channel PDCCH, The SRS power control process used by the terminal to perform SRS transmission using the configured SRS resource; or

The determining unit is configured to: determine an SRS power control process used by the SRS power control process as a terminal to perform SRS transmission from a plurality of SRS power control processes configured in advance for the terminal; the notification unit is configured to: Signaling or independent information bits in the DCI of the PDCCH, informing the terminal of the SRS power control process used for SRS transmission.

The base station according to claim 26, wherein the non-period is notified when the notification unit notifies the SRS power control process by an independent information bit in the DCI of the PDCCH, and the SRS transmission includes aperiodic SRS transmission The SRS transmission is an aperiodic SRS transmission or all aperiodic SRS transmission triggered by the DCI.

The base station according to any one of claims 22-25, wherein the determining unit is configured to: configure an SRS parameter group corresponding to a DCI format that can trigger aperiodic SRS transmission, from a terminal configured in advance When a plurality of SRS power control processes determine an SRS power control process as a terminal for aperiodic SRS transmission SRS power control process used;

The notification unit is used to:

Notifying, by the high layer signaling, the SRS power control process used by the terminal to perform the aperiodic SRS transmission associated with the SRS parameter group;

The base station according to any one of claims 22-25, wherein the determining unit is configured to: determine, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as a terminal to perform non- SRS power control process used during periodic SRS transmission;

The notification unit is used to:

And the SRS power control process used by the terminal to perform the aperiodic SRS transmission by using the trigger bit of the aperiodic SRS in the DCI of the PDCCH, where the indication information of the SRS power control process and the trigger information of the aperiodic SRS are jointly encoded; The aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions after the trigger.

30. A terminal, wherein the terminal comprises:

The power control unit is configured to obtain an SRS power control parameter corresponding to the SRS power control process, and determine an uplink transmit power of the SRS according to the SRS power control parameter;

And a transmitting unit, configured to perform SRS transmission according to the uplink sending power.

The terminal according to claim 38, wherein the receiving unit is further configured to:

The terminal according to claim 31, wherein the SRS power control parameter comprises at least one of the following parameters:

SRS transmission power adjustment value P _{SRS 0FFSET e} (m);

The target power value P used by the physical uplink shared channel PUSCH power control. _{PUSCH c} (j) or SRS dedicated target power value Ρ. — _SRS,. 0) ;

The path loss compensation factor ^α used for PUSCH power control, or the path loss compensation factor dedicated to SRS ^asRS 'person ^j ; path loss offset parameter

The terminal according to claim 31, wherein the base station is the SRS power control parameter corresponding to at least one of the plurality of SRS power control processes configured by the terminal, and is the same as the corresponding parameter in the PUSCH power control. ; with /or,

The terminal according to claim 35, wherein the power control unit is configured to:

When the SRS power control parameter includes a configuration parameter of a reference signal used by the terminal for downlink path loss measurement, performing downlink loss value based on the reference signal according to a configuration parameter of a reference signal used for performing downlink path loss measurement. Measurement, determining the uplink transmission power of the SRS according to the measured downlink path loss value.

The terminal according to any one of claims 30 to 34, wherein the receiving unit is configured to: receive, by the base station, the independent information bits in the DCI of the high layer signaling or the PDCCH, and send the used terminal to use the configured SRS. The notification of the SRS power control process used by the resource for the SRS transmission; the transmitting unit is configured to: perform periodic SRS transmission and/or aperiodic SRS transmission on the SRS resource according to the uplink transmission power; or

The receiving unit is configured to: receive a notification that the base station sends an SRS power control process by using a high-level signaling or an independent information bit in the DCI of the PDCCH, and the transmitting unit is configured to: The uplink transmit power performs periodic SRS transmission and/or aperiodic SRS transmission.

The terminal according to claim 35, wherein the SRS resource comprises: a time-frequency resource of an SRS, a cyclic shift, and an SRS port.

The terminal according to claim 35, wherein the receiving unit receives a notification of an SRS power control process used by the base station to perform SRS transmission by using an independent information bit in the DCI of the PDCCH, And when the SRS transmission includes aperiodic SRS transmission, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions after the trigger.

The terminal according to any one of claims 30 to 34, wherein the receiving unit is configured to: receive, when the base station transmits the aperiodic SRS associated with the SRS parameter group by using the high layer signaling, The SRS power control process used;

The power control unit is configured to: receive, by the base station, a DCI that triggers the aperiodic SRS transmission, and obtain an SRS power control process associated with the SRS parameter group according to the SRS parameter group corresponding to the DCI format of the DCI; The SRS power control parameter corresponding to the SRS power control process;

The transmitting unit is configured to perform aperiodic SRS transmission triggered by the DCI format corresponding to the SRS parameter group according to the uplink transmission power, or perform all aperiodic SRS transmission according to the uplink transmission power.

The terminal according to any one of claims 30 to 34, wherein the receiving unit is configured to: receive, by the base station, a trigger bit of the aperiodic SRS in the DCI of the PDCCH, and send the terminal to perform aperiodic SRS transmission. The notification of the SRS power control process, wherein the indication information of the SRS power control process is jointly encoded with the trigger information of the aperiodic SRS; the aperiodic SRS transmission is the acyclic periodic SRS transmission triggered by the DCI or after the triggering All aperiodic SRS transmissions; The transmitting unit is configured to: perform aperiodic SRS transmission triggered by the DCI according to the uplink transmission power, or perform all aperiodic SRS transmission according to the uplink transmission power.

The terminal according to any one of claims 30 to 34, wherein the power control unit is further configured to: if the same SRS resource corresponds to multiple different SRS power control processes, the base station is pre-configured The priority of the multiple SRS power control processes, and the SRS power control process with a higher priority is selected as the current SRS power control process; or

SRS transmission is not performed on the SRS resource.