WO2013166864A1

WO2013166864A1 - Power control method, device and system for sounding reference signal

Info

Publication number: WO2013166864A1
Application number: PCT/CN2013/070265
Authority: WO
Inventors: 李强
Original assignee: 华为技术有限公司
Priority date: 2012-05-11
Filing date: 2013-01-09
Publication date: 2013-11-14
Also published as: CN103391607A; CN103391607B

Abstract

A power control method of a sounding reference signal comprises: receiving power adjustment information sent by a network-side device (101), the power adjustment information comprising at least one power adjustment value of user equipment; selecting a group of power control parameters from a plurality of groups of preset power control parameters (102); based on the indication information from the network-side device, obtaining a current power adjustment value corresponding to the group of power control parameters from the at least one power adjustment value (103); determining an actual power adjustment value based on the current power adjustment value (104); and according to the actual power adjustment value and the group of power control parameters, adjusting the transmitting power of a sounding reference signal (105). In addition, also provided is another power control method for a sounding reference signal, user equipment, a network-side device and a communication system.

Description

Power control method, device and system for measuring reference signal

This application claims priority to Chinese Patent Application No. 201210146279.5, entitled "Power Control Method, Apparatus and System for Measuring Reference Signals", filed on May 11, 2012, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a power control method, apparatus, and system for measuring a reference signal (SRS, Sounding Reference Signal).

Background technique

In a Long Term Evolution (LTE) system, an SRS (Sounding Reference Signal) is sent by a User Equipment (UE, User Equipment) to an evolved base station (eNB, evolved NodeB, a base station). The signal is mainly used for the measurement of the uplink channel, and the measurement result can be used for scheduling, modulation and coding selection, and transmission time adjustment, etc. In addition, under certain conditions, the SRS can also be used for the downlink channel. measuring.

In a traditional network, a user equipment usually has only one serving base station, that is, whether it is uplink or downlink, the user equipment only corresponds to the same serving base station, but if multi-point service technology (CoMP, Cooperative Multi-Point Transmission) is adopted, In particular, under the heterogeneous network, a user equipment may correspond to multiple serving base stations. For example, in addition to the serving macro base station, there is also a serving micro base station including a pico base station (pico), femto, and a home. Low-power nodes such as base stations, so that there may be different situations between the uplink serving base station and the downlink serving base station. In the prior art, the transmit power of the SRS for the uplink channel measurement sent by the user equipment, and the transmit power of the SRS sent by the user equipment for the downlink channel measurement are all calculated based on the same serving base station. That is, the same control flow is adopted for both uplink and downlink. Therefore, under the multi-point service technology network, especially the heterogeneous network, the power control accuracy and flexibility of the SRS are not high.

Summary of the invention

Embodiments of the present invention provide a power control method, apparatus, and system for an SRS, which can improve power control accuracy and flexibility of a SRS in a multi-point service technology network, especially a heterogeneous network.

A power control method for SRS, including:

Receiving, by the network side device, power adjustment information, where the power adjustment information includes at least one power adjustment value of the user equipment; Selecting a set of power control parameters among the preset plurality of sets of power control parameters;

Obtaining, according to the indication information from the network side device, a current power adjustment value corresponding to the set of power control parameters in the at least one power adjustment value;

Determining an actual power adjustment value based on a current power adjustment value;

Adjusting the transmit power of the SRS according to the actual power adjustment value and a set of power control parameters. A power control method for SRS, including:

Determining, in the at least one power adjustment value of the user equipment, a current power adjustment value corresponding to a group of power control parameters selected by the user equipment, where the group of power control parameters is selected by the user equipment among the preset multiple sets of power control parameters The current power adjustment value and the set of power control parameters are used to adjust the transmit power of the SRS of the user equipment;

The user equipment is provided with power adjustment information including at least one power adjustment value, and indication information for indicating a current power adjustment value in at least one power adjustment value.

A user equipment, including:

a receiving unit, configured to receive power adjustment information sent by the network side device, where the power adjustment information includes at least one power adjustment value of the user equipment;

a parameter selection unit, configured to select a set of power control parameters among the preset multiple sets of power control parameters;

And an adjustment value selection unit, configured to acquire, according to the indication information from the network side device, a current power adjustment value corresponding to the group of power control parameters in the at least one power adjustment value;

a determining unit, configured to determine an actual power adjustment value based on the current power adjustment value;

And an adjusting unit, configured to adjust a transmit power of the SRS according to the actual power adjustment value and the set of power control parameters.

A network side device, including:

a determining unit, configured to determine, in the at least one power adjustment value of the user equipment, a current power adjustment value corresponding to a group of power control parameters selected by the user equipment, where the group of power control parameters are preset by the user equipment The power control parameter is selected; the current power adjustment value and the set of power control parameters are used to adjust a transmit power of the SRS of the user equipment;

And a sending unit, configured to provide, to the user equipment, power adjustment information including at least one power adjustment value, and indication information used to indicate a current power adjustment value in the at least one power adjustment value. A communication system includes any user equipment and network side equipment provided by the embodiments of the present invention. In the embodiment of the present invention, the power adjustment information including the at least one power adjustment value of the user equipment sent by the network side device is selected, and a set of power control parameters are selected in the preset multiple sets of power control parameters, and then based on the indication from the network side device. Obtaining, in the at least one power adjustment value, a current power adjustment value corresponding to the selected one of the power control parameters, and determining an actual power adjustment value based on the current power adjustment value, and finally, according to the actual power adjustment value and the selected A set of power control parameters adjusts the transmit power of the SRS. Because the solution can select different power control parameters according to different preset policies, such as for different target serving base stations, or different control algorithms in the serving base station, and indicate the user equipment in multiple sets of power adjustment by using indication information. The corresponding power adjustment value is selected in the value to adjust the transmission power of the SRS. Therefore, the transmission power of the SRS can be calculated only for one serving base station fixedly, and only the power adjustment value for one power control flow can be transmitted. In other words, the power control accuracy and flexibility of SRS in multi-point service technology networks, especially heterogeneous networks, are greatly improved.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings may be obtained according to these drawings without any creative work.

1 is a flowchart of a power control method of an SRS according to an embodiment of the present invention;

2 is a flowchart of a power control method of an SRS according to an embodiment of the present invention;

FIG. 3 is an application scenario diagram of a power control method for an SRS according to an embodiment of the present disclosure;

FIG. 3b is another flowchart of a power control method for an SRS according to an embodiment of the present invention;

4 is still another flowchart of a power control method for an SRS according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a network side device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, those skilled in the art are not creative All other embodiments obtained under the premise of the invention are within the scope of the invention.

In order to better explain the embodiments of the present invention, a method of calculating the transmission power of the SRS will be briefly described below. As follows: Before the user equipment sends the SRS, first determine the transmit power of the SRS. For example, the SRS transmit power P _SRS (0 ('·), ⁺¹ 0 ( ^M ( + « ( j) can be calculated according to the following formula. ) ' PL + f (i) }; where _ΜΑΧ (where ο is the maximum transmit power of the user equipment, p _SRS — _QFFSET , _PUSCH ( ) and “ω is a parameter from the higher layer configuration of the user equipment or network side equipment, M _SRS is the bandwidth of SRS, PL is the path loss information measured by the user equipment, and / (0 is the adjustment value of closed-loop power control (power control can be called power control). This embodiment and subsequent implementation The high level mentioned in the example may be an RRC (Radio Resource Contra) layer.

PcMAxW' PsRs - +101og ₁ . (M _SRS ) + _J P. — _PUSCH ) + « ( ) -PL + /(/)} It can be seen that the network side device can transmit downlink physical layer control signaling (DCI, Downlink) on the physical downlink control channel (PDCCH). Control information ) to directly control the size of the adjustment value, thereby controlling the size of the SRS transmission power of the user equipment _SRS W. The adjustment value / (may be an adjustment value δ{ί-Κ) directly issued by the network side device, or a value, value, adjustment value f(i) = /(ί-1) + δ(ί-Κ), δ(ί-Κ) The adjusted value of the transmission power of the SRS transmitted by the base station to the user equipment in the iqth subframe.

Embodiments of the present invention provide a power control method, apparatus, and system for an SRS. The following is a detailed description. Embodiment 1

This embodiment will be described from the perspective of a user equipment, which may be a device such as a mobile phone, a tablet computer or a notebook computer.

A power control method for an SRS, comprising: receiving power adjustment information sent by a network side device, where the power adjustment information includes at least one power adjustment value of the user equipment; and preset multiple sets of power control Selecting a set of power control parameters from the parameters; obtaining, according to the indication information from the network side device, a current power adjustment value corresponding to the selected one of the power control parameters in the at least one power adjustment value; determining based on the current power adjustment value The actual power adjustment value; adjusting the transmission power of the measurement reference signal according to the determined actual power adjustment value and the selected set of power control parameters.

As shown in Figure 1, the specific process can be as follows:

101. Receive power adjustment information sent by a network side device.

The power adjustment information may specifically include at least one power adjustment value of the user equipment, and may further include other information related to power adjustment. The power adjustment value is specifically provided by a network side device such as a base station. In a specific implementation, the power adjustment information may only carry the power adjustment value provided by the target serving base station, or may carry the power adjustment value provided by multiple serving base stations, and then indicate the power adjustment value to be adopted by the indication information of the network side device. Of course, there are other ways, which are not limited herein.

It should be noted that, the network side device may specifically be a base station, such as a serving macro base station or a serving micro base station, and if the user equipment has multiple serving base stations, the network side device may specifically be the multiple serving base stations. Any one of the base stations, for example, may be a downlink serving base station, where information provided by other serving base stations, such as a power adjustment value, may be transmitted to the serving base station (ie, the network side device) through communication between the base stations, by the service. The base station (ie, the network side device) transmits to the user equipment.

102. Select a group of power control parameters in the preset multiple sets of power control parameters.

Each set of power control parameters means a power control flow, and each set of power control parameters may include a maximum transmit power of the user equipment (ie, _ΜΑΧ (0), a high-level configuration parameter (such as P _SRS —. _τ , P _{O PUSCH} ( ) ^ a( ) ), the bandwidth of the SRS (ie, M _SRS ) and the path loss information (pathloss ) measured by the user equipment.

The power control parameter may be selected according to a preset policy, and the preset policy may be set according to requirements of an actual application, for example, may be selected by the user equipment according to the target serving base station, or may be selected according to the network device. Side instructions to make choices, and so on. For example, the specifics can be as follows:

(1) The user equipment selects according to the target serving base station, as follows:

Determining a target serving base station, and setting a plurality of sets of power control parameters according to the determined target serving base station A set of power control parameters is selected, that is, a set of power control parameters corresponding to the target serving base station is obtained in the preset multiple sets of power control parameters.

The notification may be performed by receiving the upper layer signaling of the network side device, and then using the upper layer signaling configuration to learn which serving base station the target serving base station of the current service is, or may receive other notification messages sent by the network side device, according to the notification. The message is to know which serving base station the target serving base station of the current service is, and so on. For example, if the serving base station of the user equipment is the base station A and the downlink serving base station of the user equipment is the base station B, if the downlink channel of the user equipment needs to be measured, the target serving base station of the SRS sent by the user equipment is the base station. B. Conversely, if the uplink channel of the user equipment needs to be measured, the target serving base station of the SRS sent by the user equipment is the base station A, and so on.

In addition, multiple sets of power control parameters may be preset for the SRS, and each set of power control parameters corresponds to a serving base station or a type of serving base station. Thus, after the target serving base station is determined, a corresponding set of power control parameters can be found according to the determined target serving base station.

(2) Select according to the instructions of the network side device; as follows:

For example, a group of power control parameters may be selected by carrying a message in downlink control signaling (DCI, Downlink control information) sent by the network side device.

It should be noted that, in step 102 and step 101, execution may be performed in no particular order.

103. Acquire, according to the indication information from the network side device, the current power adjustment value corresponding to the group of power control parameters selected in step 102, in the at least one power adjustment value received in step 101;

The indication information may be obtained in a plurality of manners, for example, by using a high-level control signaling configuration, or the like, or if the power adjustment information is transmitted through the DCI in step 101, the DCI may be obtained at this time. Instructions. For example, the indication information may be obtained by using any one of the following methods:

(1) Indicated by the SRS trigger information bit in the DCI.

That is, the SRS trigger information bit is set in the DCI, and the SRS trigger information bit is used to carry the indication information, which is used to indicate which power adjustment value the user equipment should select, so that after the user equipment receives the DCI, the user equipment can pass the DCI. SRS trigger information bit to obtain the indication information, thereby rooting The current power adjustment value corresponding to the set of power control parameters selected in step 102 is obtained in the at least one power adjustment value according to the indication information. For example, if the DCI has a 1-bit SRS trigger information bit, and the control flow corresponding to the first set of power control parameters is called "power control flow", the control flow corresponding to the second set of power control parameters is called "work". Control flow 2", then, if the trigger information bit is set to '0, then the power adjustment value carried by the DCI will be used for the power control flow 1, and if the trigger information bit is set to T, then the transmission power adjustment information is used. The power adjustment value carried by the information bit will be used for the power control process 2.

(2) Instructed by a Wireless Network Temporary Identifier (PC-RNTI).

Similar to (1), the (2) method also carries the indication information in the DCI, which is different from the (1) mode. The (2) mode is not a direct indication, but the DCI is scrambled by using the PC-RNTI. Then, the user equipment determines the current PC-RNTI by descrambling the DCI, and further determines the indication information of the current PC-RNTI indication. That is, before the step of "acquiring the current power adjustment value corresponding to the selected set of power control parameters in the at least one power adjustment value based on the indication information from the network side device", the power control method of the SRS may further Includes:

The current PC-RNTI is determined by descrambling the DCI to determine the indication information of the current PC-RNTI indication.

For example, if the control flow corresponding to the first set of power control parameters is referred to as "power control flow 1", the control flow corresponding to the second set of power control parameters is referred to as "power control flow 2", and the power control flow 1 The corresponding PC-RNTI is "XXXX", and the PC-RNTI corresponding to the power control flow 2 is 'ΎΥΥΥ'. Then, when the user equipment receives the DCI, the DCI is descrambled by using "XXXX" and "ΎΥΥΥ" respectively. If "XXXX" can be descrambled successfully, it indicates that the power adjustment value carried in the DCI is applicable to the power control process 1. If the 'ΎΥΥΥ" can be successfully descrambled, it indicates that the power adjustment value carried in the DCI is applicable to the power control. Process 2, and so on.

(3) Indicated by high-level signaling configuration.

That is, before receiving the power adjustment information sent by the network side device (step 101), the power control method of the SRS may further include: receiving the high layer signaling sent by the network side device, where the high layer signaling carries the indication information.

104. Determine an actual power adjustment value based on a current power adjustment value; for example, the specific may be as follows: (1) If the acquisition mode of the actual power adjustment value is not specified, the current power adjustment value is directly used as the actual power adjustment value, that is, ^ (0 = ^ · -^), where / _arf (o represents the actual power adjustment value, δ(ί - Κ) indicates the current power adjustment value.

(2) If the acquisition mode of the actual power adjustment value is specified, for example, the acquisition mode of the actual power adjustment value is the direct indication mode, or the acquisition mode of the actual power adjustment value is the accumulation mode, etc., at this time, the current determination is determined. After the power adjustment value, the actual power adjustment value needs to be further determined according to the actual power adjustment value acquisition manner, as follows:

If the indication of the actual power adjustment value is obtained by the indication of the high-level signaling, the current power adjustment value is determined as the actual power adjustment value, that is, κο = ^- , where 0 represents the actual power adjustment value, ^- Indicates the current power adjustment value. Or,

If the acquisition mode of the actual power adjustment value is obtained by the indication of the high-level signaling, the sum of the last actual power adjustment value and the current power adjustment value is taken as the actual power adjustment value, that is, fn an K), where , indicates the actual power adjustment value, indicating the current power adjustment value, ^ ' -ι) indicates the last actual power adjustment value. Or,

In addition, the user equipment may receive multiple power adjustment values for it before sending the SRS. In this case, another method may be used to obtain the actual power adjustment value. It is as follows:

If the indication of the actual power adjustment value is obtained by the indication of the high-level signaling, the method for obtaining the actual power adjustment value is the direct indication mode; when there are multiple current power adjustment values, the last received one is selected as the actual power among the plurality of current power adjustment values. Adjust the value. Or,

If the acquisition mode of the actual power adjustment value is obtained by the indication of the high layer signaling, the sum of the plurality of current power adjustment values is used as the actual power adjustment value when there are multiple current power adjustment values.

It should be noted that since there is a time limit for the validity of the power adjustment information before transmitting the SRS, for example, the SRS is transmitted in the ηth subframe, only the power adjustment information received before the nk subframe is valid, where The value of k can be set according to the needs of the actual application. Therefore, it should be understood that the "current power adjustment information" in the embodiment of the present invention refers to valid power adjustment information; for example, if the SRS is transmitted in the nth subframe, and the system is set before the nk subframe If the received power adjustment information is valid, then the "current power adjustment value has multiple" refers to the previous example. Yes, before the k subframe before the SRS transmission (ie, before the nk subframe), if there is multiple current power adjustment information, the last current power adjustment information received before the nk subframe is used as the actual power adjustment. Value, and so on, and so on.

It should be noted that the high-level signaling configuration may be configured by the network-side device by sending the high-layer signaling before the user equipment determines the actual power adjustment value. For the method for configuring the high-level signaling, refer to the prior art. This will not be repeated here.

105. Adjust the transmit power of the SRS according to the actual power adjustment value determined in step 102 and a set of power control parameters obtained in step 103.

For example, if the transmit power of the SRS is represented by _RS W, how to adjust specifically can be calculated by using the following formula to calculate the transmit power of the _SRS with P _SRS (ί):

Where _ΜΑΧ ( ) is the maximum transmit power of the user equipment, P _SRS ―. _SET , P _{O PTJSCH} (j) ^ a(j) is the power control parameter of the high-level configuration, M _SRS is the bandwidth of the SRS, and PL is the path loss (path loss) information (pathloss) measured by the user equipment, and The closed loop power control adjustment value, that is, the "actual power adjustment value" in the embodiment of the present invention. It can be seen that, in this embodiment, the power adjustment information including the at least one power adjustment value of the user equipment sent by the network side device is selected, and a set of power control parameters are selected among the preset multiple sets of power control parameters, and then based on the network side. And indicating, by the indication information of the device, a current power adjustment value corresponding to the selected one of the power control parameters, and determining an actual power adjustment value based on the current power adjustment value, and finally adjusting the value according to the actual power. And selecting a set of power control parameters to adjust the transmit power of the SRS. Because the solution can select different power control parameters according to different preset policies, such as for different target serving base stations, or different control algorithms in the serving base station, and indicate the user equipment in multiple sets of power adjustment by using indication information. The power adjustment value is selected to adjust the transmit power of the SRS, so that the transmit power of the SRS can only be calculated fixedly for one serving base station, and only the power adjustment value for one power control process can be sent. Words, greatly improve the power control fineness of SRS in multi-point service technology networks, especially heterogeneous networks Degree and flexibility. Embodiment 2

According to the method described in the first embodiment, the power adjustment information may be specifically transmitted through a medium access layer (MAC, Media Access Control) signaling, or may be configured by using downlink control signaling (DCI). The physical layer control channel (PDCCH) is transmitted on the physical downlink control channel (PDCCH), that is, the step 101 in the implementation may be: 3⁄4:

1. Receiving power adjustment information transmitted by the network side device through MAC signaling; or

2. Receive power adjustment information transmitted by the network side device through the DCI. For example, you can use any of the following methods:

(1) receiving the DCI sent by the network side device, which is referred to herein as a first DCI (ie, first downlink control signaling) for convenience of description, and the first DCI may include an information bit for transmitting power adjustment information. The information bit is divided into at least two sub-information bits, and each sub-information bit carries a power adjustment value.

For example, taking one information bit into at least two sub-information bits as an example, one of the sub-information bits may carry the power adjustment value provided by the serving base station A, and the other sub-information bit carries the power adjustment value provided by the serving base station B. .

(2) Receiving the DCI sent by the network side device, for convenience of description, referred to herein as a second DCI (ie, second downlink control signaling), the second DCI may include at least two information bits for transmitting power adjustment information. , where each information bit carries a power adjustment value.

For example, taking two information bits as an example, one of the information bits may carry the power adjustment value provided by the serving base station A, and the other information bit carries the power adjustment value provided by the serving base station B.

(3) receiving the DCI sent by the network side device. For convenience of description, it is referred to herein as a third DCI (ie, third downlink control signaling), and the third DCI may include an information bit for transmitting power adjustment information, where , the information bit carries a power adjustment value.

For example, if the target serving base station is the serving base station A, let the information bit carry the power adjustment value provided by the serving base station A, and if the target serving base station is the serving base station B, let the information bit carry the power adjustment provided by the serving base station B. Value, and so on, and so on. After receiving the DCI (such as the first DCI, the second DCI, or the third DCI) sent by the network side device, the at least one power adjustment value carried in the DCI may be used as the current one based on the indication information provided by the network side device. For the description of the indication information, refer to the first embodiment, and details are not described herein again.

In addition, in order to improve the transmission efficiency, the power adjustment information for the multiple user equipments may be carried in the DCI, and then the higher-level signaling configuration is used to inform the user equipment which location of the corresponding power adjustment information is specifically in the DCI. For example, the DCI may carry power adjustment information for the user equipment A, power adjustment information for the user equipment B, and power adjustment information for the user equipment C, etc., after the user equipment A receives the DCI, according to the high-level letter. The configuration is configured to find the adjustment information corresponding to the user equipment A from the DCI. Similarly, after receiving the DCI, the user equipment B may also find the user equipment B corresponding to the user equipment B according to the preset high-layer signaling configuration. Adjust the information, and so on. That is, if the power adjustment information for the multiple user equipments is included in the DCI, the method may further include: receiving, by the network side device, high layer signaling that carries the correspondence between the at least one power adjustment value and the user equipment;

Then, before the "current power adjustment value corresponding to the selected set of power control parameters (ie, step 103) is acquired in the at least one power adjustment value based on the indication information from the network side device, It can also include:

And extracting, according to the correspondence between the at least one power adjustment value and the user equipment, the at least one power adjustment value for the user equipment in the power adjustment information.

In addition, in order to improve the security of the signaling transmission, the network side device may also encrypt the DCI when transmitting the DCK, such as the first DCI, the second DCI, or the third DCI, and then the user equipment according to the two parties (ie, the user equipment and The network side device) scrambles the DCI to obtain the DCI. For example, the network side device may configure an identifier (ID, Identifier) for the user equipment, such as a PC-RNTI. When the network side device needs to send the DCI carrying the power adjustment value to the user equipment, the PC-RNTI may receive the After the DCI is scrambled, the user equipment receives the encrypted DCI, and then descrambles the encrypted DCI according to the known PC-RNTI to obtain the power adjustment value. Optionally, different PC-RNTIs may be configured for different groups of power control parameters, and user equipments are descrambled by different PC-RNTIs to obtain corresponding groups of power control parameters. The power adjustment value, at this time, the scrambling and descrambling operation is equivalent to the indication information used to indicate which power adjustment value is selected. For details, refer to the indication manner of the indication information in the first embodiment, and details are not described herein again. Of course, the same PC-RNTI can be configured for different sets of power control parameters, and details are not described herein again.

Since the existing DCIs have different formats (DCI format), there is an information bit in some formats for transmitting SRS power adjustment values, such as DCI formatO, DCI format4, DCI format3, and DCI format3a. Therefore, on the basis of the existing DCI, a plurality of power adjustment values can be carried by dividing the "information bits for transmitting power adjustment information" or adding a new "information bit for transmitting power adjustment information". .

For example, in the prior art, a bit (bit) in a DCI is used to carry a power adjustment value for an existing power control process (for example, a power adjustment value provided by the downlink serving base station A), and then in the embodiment of the present invention. The 2 bit can be divided into two parts (that is, divided into two sub-information bits), the first lbit is used to carry the power adjustment value for the existing power control process, and the latter lbit can be used to carry the new power control process. The power adjustment value (such as the power adjustment value provided by the serving base station B in the uplink).

For example, in the prior art, the original size of a DCI is 20 bits, and after the high-level signaling configuration, the DCI size can be increased to 22 bits, where the added 2 bits are used to carry the power adjustment for the new one. value.

Alternatively, the existing DCI format may be used, but before the DCI is sent, the network side device informs the user equipment through the high layer signaling configuration, and the power adjustment value carried by the current DCI is the power adjustment value provided by the serving base station. can.

It should be noted that, in order to reduce the amount of information, in the various transmission modes of the power adjustment information, the transmitted power adjustment value may not be a specific value, but an index value, and then the user equipment according to the received index value. Find the power adjustment value mapping table to obtain the specific value of the corresponding power adjustment value.

The above is only an example of carrying a power adjustment value in the DCI (that is, carrying a total of two power adjustment values). It should be understood that the power adjustment value carried may be multiple, for example, one may be used for The information bits of the transmission power adjustment information are "divided into 3 parts, or 4 parts, even 5 parts, etc., each part is a sub-information bit, and one sub-information bit carries a power adjustment value; for example, DCI can also be used. Add two information bits, or three information bits, etc., each information bit It can carry a power adjustment value, and so on, and will not be described here. In addition, the DCI may carry an SRS trigger information bit to indicate which power control value is selected in the at least one power adjustment value, in addition to the information bit for transmitting the power adjustment information, as shown in the first embodiment. I will not repeat them here. For example, if the DCI has a 1-bit SRS trigger information bit, a 2-bit information bit for transmitting power adjustment information, and the control flow corresponding to the first group of power control parameters is referred to as "power control flow 1", the second The control flow corresponding to the group power control parameter is called "power control flow 2". Then, if the trigger information bit is set to "0", the power adjustment value carried by the DCI will be used for the power control flow 1, if the trigger information The bit is set to "Γ, then the power adjustment value carried by the information bits used to transmit the power adjustment information will be used for the power control flow 2.

In addition, it should be noted that, if the DCI is used for the transmission of the power control information, the user equipment may first determine the DCI when receiving the DCI sent by the network side device, and determine that the DCI is applicable to the embodiment of the present invention. The power control method, if applicable, performs step 101, no, and uses the prior art method to perform power control of the SRS. For example, it can be determined by any of the following methods:

1. Determine whether the DCI format has the SRS triggering capability. If yes, it indicates that the power control method provided by the embodiment of the present invention can be applied. If not, the power control of the SRS is performed by using the prior art method. For example, DCI format la, DCI format 2b, DCI format 2c, DCI format 0 or DCI format 4 have SRS triggering capability, and thus can be applied to the power control method provided by the embodiment of the present invention.

2. Determine whether the DCI format meets the following conditions at the same time: (1) The DCI format is used for downlink data scheduling; (2) The DCI format has SRS trigger capability. If the two conditions are met at the same time, it can be applied to the power control method provided by the embodiment of the present invention. If the two conditions cannot be met at the same time, the power control of the SRS is performed by using the prior art method. For example, the DCI format la, the DCI format 2b, or the DCI format 2c can satisfy the above two conditions, and thus can be applied to the power control method provided by the embodiment of the present invention.

3. Determine whether the DCI format satisfies the following conditions at the same time: (1) the DCI format is used for downlink data scheduling; (2) the DCI format has SRS trigger capability; (3) the SRS trigger information bit of the DCI is triggered by SRS. . If the three conditions can be met at the same time, it can be applied to the power control method provided by the embodiment of the present invention. If the three conditions cannot be met at the same time, the existing technology is adopted. The method of operation performs power control of the SRS. For example, the DCI format la, the DCI format 2b, or the DCI format 2c can satisfy the above three conditions. When the DCI formatla/2b/2c is sent to the user equipment, and the user equipment performs the SRS trigger according to the SRS trigger information bit, Then, it can be applied to the power control method provided by the embodiment of the present invention.

4. Determine whether the DCI format satisfies the following conditions at the same time: (1) The DCI format is used for uplink data scheduling; (2) the DCI format has SRS trigger capability. If the two conditions are met at the same time, it can be applied to the power control method provided by the embodiment of the present invention. If the two conditions cannot be met at the same time, the power control of the SRS is performed by using the prior art method. For example, DCI format O or DCI format 4 can satisfy the above two conditions, and thus can be applied to the power control method provided by the embodiment of the present invention.

5. The DCI format satisfies the following conditions: (1) The DCI format is used for uplink data scheduling; (2) the DCI format has SRS trigger capability; (3) the SRS trigger information bit of the DCI is triggered by SRS. If the three conditions can be satisfied at the same time, it can be applied to the power control method provided by the embodiment of the present invention. If the three conditions cannot be met at the same time, the power control of the SRS is performed by the prior art method. For example, DCI format 0 or DCI format 4, and SRS triggering, can satisfy the above three conditions, and thus can be applied to the power control method provided by the embodiment of the present invention.

6. Determine whether the DCI format is used for the group power control adjustment. If yes, it indicates that the power control method provided by the embodiment of the present invention can be applied. If not, the power control of the SRS is performed by using the prior art method. For example, DCI format 3 or DCI format 3a can be used for group power control adjustment, and thus can be applied to the power control method provided by the embodiment of the present invention.

As shown in the above, the embodiment of the present invention provides multiple manners for receiving power adjustment information sent by the network side device, and therefore, in addition to achieving the effective effects described in Embodiment 1, further The flexibility and selectivity of the solution implementation are improved. Moreover, the method for transmitting the power adjustment information only needs to modify the existing DCI, and can be applied to most application scenarios to achieve a relatively simple operation. Embodiment 3

This embodiment is described from the perspective of a network side device, which may be a base station, such as a serving macro base station or a serving micro base station. A power control method for measuring a reference signal, as shown in FIG. 2, the specific process may be as follows:

201. Determine, in the at least one power adjustment value of the user equipment, a current power adjustment value corresponding to a set of power control parameters selected by the user equipment.

Wherein, the “set of power control parameters selected by the user equipment” is selected by the user equipment among the preset plurality of power control parameters; and the current power adjustment value and the “set of selected power control parameters” are used for the user. The transmission power of the measurement reference signal of the device is adjusted. For details, refer to the previous embodiment, and details are not described herein again.

202. Provide, to the user equipment, power adjustment information including at least one power adjustment value, and indication information for indicating a current power adjustment value in the at least one power adjustment value.

For example, the power adjustment information may be sent to the user equipment by using the MAC signaling; or the power adjustment information may be sent to the user equipment by using the DCI. For the specific manner of sending the power adjustment information by using the DCI, refer to the second embodiment. No longer.

The indication information may be provided to the user equipment in multiple manners, for example, by using a high-level control signaling configuration to provide the user equipment, etc., or, if the power adjustment information is transmitted through the DCI, the DCI may also pass the DCI. To send the indication information to the user equipment. For example, you can use any of the following methods to obtain the indication information:

(1) The information is indicated by the SRS trigger information bit in the DCI. For details, refer to the first embodiment, and details are not described herein again.

(2) indicated by PC-RNTI;

In this case, before the DCI sends the power adjustment information to the user equipment, the method further includes: using the PC-RNTI to scramble the downlink control signaling, so that the user equipment passes the

Decoding the DCI to determine the current PC-RNTI, and then determining the finger of the current PC-RNTI indication

The entire information is then sent to the user equipment through the high-level signaling configuration to inform the user where the corresponding power adjustment information is in the DCI. That is, if the power adjustment information further includes other at least one power adjustment value of the other user equipment, the step "provides the user equipment with power adjustment including at least one power adjustment value. Before the information (ie, step 202), the power control method of the SRS may further include:

Transmitting the high-level signaling to the user equipment, where the high-level signaling carries the correspondence between the at least one power adjustment value and the user equipment, so that the user equipment is in the power according to the “corresponding relationship between the at least one power adjustment value and the user equipment” In the adjustment information, the at least one power adjustment parameter is extracted for the user equipment. In this embodiment, the current power adjustment value corresponding to a group of power control parameters selected by the user equipment is determined in at least one power adjustment value of the user equipment. And then providing the user equipment with power adjustment information including the at least one power adjustment value, and indication information for indicating the current power adjustment value in the at least one power adjustment value, so that the user equipment can be in multiple groups for different power control parameters. The power adjustment value is selected to adjust the transmission power of the SRS, which greatly improves the power control accuracy and flexibility of the SRS in the multi-point service technology network, especially in the heterogeneous network. Embodiment 4

The method described in the previous embodiment will be exemplified in detail below.

As shown in FIG. 3a, the user equipment A is integrated with the power control apparatus provided by the embodiment of the present invention, and the user equipment A has two serving base stations: a macro base station B and a micro base station C, wherein the macro base station B is the user equipment A. The downlink serving base station, the base station C is the uplink serving base station of the user equipment A.

First, two sets of power control parameters can be preset for the SRS preset, one set of power control parameters corresponding to the macro base station B, and another set of power control parameters corresponding to the micro base station C. Next, the micro base station C needs to communicate with the macro base station B, and transmits the power adjustment value provided by the micro base station C to the macro base station B, and the macro base station B provides the user equipment A. As shown in FIG. 3b, the flow of the SRS power control method may be specifically as follows:

301, the macro base station B transmits the power adjustment information to the user equipment A by using the MAC signaling, where the power adjustment information includes a power adjustment value 1 and a power adjustment value 2, and the power adjustment value 1 is a power adjustment value provided by the macro base station B, and the power The adjustment value 2 is the power adjustment value provided by the micro base station C. The power adjustment value 1 is located in the first lbit of the power adjustment information, and the power adjustment value 2 is located in the last lbit of the power adjustment information.

It should be noted that the power adjustment value 2 can be transmitted to the macro base station B through the communication between the micro base station C and the macro base station B. For details, refer to the prior art, and details are not described herein.

302. The user equipment A determines a target serving base station that sends the SRS, and selects a corresponding set of power control parameters from the preset two sets of power control parameters according to the determined target serving base station. For example, in this embodiment, if the downlink channel needs to be measured, the target serving base station is the macro base station B. If the uplink channel needs to be measured, the target serving base station is the micro base station C. For convenience of description, the following The target serving base station is taken as an example of the macro base station B.

If the determined target serving base station is the macro base station B, then at this time, the user equipment A selects a set of power control parameters corresponding to the macro base station B.

The set of power control parameters may include a maximum transmit power P _{CMAX of the} user equipment (0, a parameter of the high-level configuration p _SRS — _QFFSET , ρ. — _PUSCH (and a bandwidth M _{SRS of the SRS} , and a path measured by the user equipment A) Loss information PL.

303. The user equipment A obtains the current power adjustment value corresponding to the group of power control parameters selected in step 302 from the power adjustment information according to the high layer signaling configuration.

The high-level signaling configuration carrying indication information is used to indicate the location of the current power adjustment value in the power adjustment information. In addition, the high-level signaling configuration further indicates an actual power adjustment value acquisition manner, where the high-layer signaling configuration is specific. It can be configured by the macro base station B by sending high layer signaling to the user equipment A.

For example, if the downlink channel needs to be measured (that is, the target serving base station is the macro base station B), then the user equipment A can learn that the current power adjustment value is specifically located in the first Ibit in the power adjustment information according to the high layer signaling configuration. Then, the current power adjustment value is extracted from the first I bit in the power adjustment information, that is, the power adjustment value 1 is extracted.

Of course, for the convenience of carrying and saving the information, the current power adjustment value may not be a specific value, but an index value, and then the user equipment A obtains the power adjustment value by searching the power adjustment value mapping table according to the index value. For the convenience of description, the following is an example in which the current power adjustment value is specifically an index value. For details, the power adjustment value mapping table can be found in Table 1.

Table I:

It should be noted that the power adjustment value mapping table shown in Table 1 is only one of the modes. It should be understood that the power adjustment value mapping table may also exist in other styles, and details are not described herein again.

In addition, it should be noted that, in addition to the high-level signaling to carry the indication information, the indication information may be carried in other manners. For details, refer to the previous embodiment, and details are not described herein again.

The user equipment A determines the actual power adjustment value according to the high-level signaling configuration. If the actual power adjustment value is obtained in the direct indication mode, the current power adjustment value is directly used as the actual power adjustment value, that is, ^ ( 0 = ^( - ; If the actual power adjustment value is obtained in the accumulation mode, the last actual power adjustment value will be obtained, and the sum of the last actual power adjustment value and the current power adjustment value will be taken as the actual power adjustment value. , f _ad (i) = f _ad (i -D + S(i - K) . where f _ad (i) represents the actual power adjustment value, indicating the current power adjustment value, indicating the last actual power adjustment value.

For example, if the index value of the current power adjustment value determined in step 303 is "11", the specific value of the current power adjustment value corresponding to the direct indication mode is "4", and the accumulation mode is The specific value of the corresponding current power adjustment value is "3". If the acquisition mode of the actual power adjustment value is determined according to the high-level signaling configuration as the direct indication mode, then, according to (0 = -, the actual power adjustment value /. ' The specific value is "4"; if the acquisition mode of the actual power adjustment value is determined according to the high-level signaling configuration, and the last actual power adjustment value is "-1", then, according to ^ (0 = /.^ -1) ₊ ^- It can be seen that the actual power adjustment value ^ (the specific value of 0 is "2".

305. User equipment A obtains the actual power adjustment value obtained in step 304 and obtains in step 302. The obtained power control parameters are used to calculate the transmit power of the SRS, as follows:

Ρ ₅ {ή ^{= Ώήη} { U ' PsRS +lOlOgU + U ^ + a (j) - PL + f _ad (i)} ; where, represents the transmit power of the SRS, _ΜΑΧ (0 is the maximum transmit power of the user equipment, p _SRS —, _PUSCH ( ) and “ ( ) are parameters of the high-level configuration, M _srs is the bandwidth of the SRS, and PL is the path loss information measured by the user equipment.

306. Send the SRS to the target serving base station according to the transmit power of the SRS obtained in step 305. For example, if the target serving base station is the macro base station B, send the SRS to the macro base station according to the transmit power of the SRS obtained in step 305: 8.

It should be noted that, in this embodiment, the user equipment is selected according to the target serving base station as an example. It should be understood that the base station may directly indicate which set of power control parameters should be selected. The method for its implementation is similar to the above, and will not be described again here. In addition, in this embodiment, the power adjustment information is transmitted by using only MAC signaling as an example. It should be understood that the power adjustment information may also be transmitted through DCI signaling, where the DCI signaling carries power adjustment information. For details, refer to the second embodiment, and details are not described herein again.

It can be seen that the macro base station B in the embodiment of the present invention can send the user equipment including the user equipment through MAC signaling.

The power adjustment information of the two power adjustment values of A is sent to the user equipment A, and the target service base station is determined by the user equipment A, and a corresponding set of power control parameters are obtained according to the target service base station in the preset multiple sets of power control parameters, and then the Acer base The station B indicates that the user equipment selects the current power adjustment value by carrying the indication information in the high layer signaling, and then determines the actual power adjustment value, and finally calculates the transmission power of the SRS according to the actual power adjustment value and the obtained set of power control parameters. Since the solution can calculate the transmit power of the SRS by using different power control parameters and actual power adjustment values for different target serving base stations, the transmit power of the SRS can only be calculated fixedly for one serving base station relative to the prior art. And can only send power adjustment values for a power control process, greatly improving the power control accuracy and flexibility of SRS under heterogeneous networks. Embodiment 5

The user equipment may also receive multiple power adjustment values for it before sending the SRS. Therefore, in addition to the method for calculating the actual power adjustment value provided in Embodiment 4, another method may be adopted. The calculation method will be described below by way of example.

In this embodiment, the application scenario in FIG. 3a is still taken as an example for description. Different from the fourth embodiment, in the present embodiment, the power control information is not transmitted through the MAC signaling, but the power control information is transmitted through the DCI signaling.

First, two sets of power control parameters can be preset for the SRS preset, one set of power control parameters corresponding to the macro base station B, and another set of power control parameters corresponding to the micro base station C. Next, the micro base station C needs to communicate with the macro base station B, and transmits the power adjustment value provided by the micro base station C to the macro base station B, and the macro base station B provides the user equipment A. As shown in FIG. 4, the flow of the SRS power control method may be specifically as follows:

401. The macro base station B transmits the power adjustment information to the user equipment A by using the DCI, where the power adjustment information includes a power adjustment value 1 and a power adjustment value 2, where the power adjustment value 1 is a power adjustment value provided by the macro base station B, and the power adjustment value. 2 is the power adjustment value provided by the micro base station C.

The DCI carries the power adjustment information in multiple manners. For details, refer to the second embodiment. In this embodiment, the DCI includes two information bits for transmitting power adjustment information, where One information bit carries a power adjustment value of 1, and the second information bit carries a power adjustment value of 2.

402. The user equipment A determines a target serving base station that sends the SRS, and selects a corresponding set of power control parameters from the preset two sets of power control parameters according to the determined target serving base station.

For example, in this embodiment, if the downlink channel needs to be measured, the target serving base station is the macro base station B. If the uplink channel needs to be measured, the target serving base station is the micro base station C. For convenience of description, the following The target serving base station is taken as an example of the macro base station B.

403. The user equipment A obtains the current power adjustment value corresponding to the group of power control parameters selected in step 402 from the power adjustment information according to the high layer signaling configuration. The high-level signaling configuration carrying indication information is used to indicate the location of the current power adjustment value in the power adjustment information. In addition, the high-level signaling configuration further indicates an actual power adjustment value acquisition manner, where the high-layer signaling configuration is specific. It can be configured by the macro base station B by sending high layer signaling to the user equipment A.

For example, if the measurement of the downlink channel is required, that is, the target serving base station is the macro base station B, the user equipment A can obtain the current power corresponding to the selected one of the power control parameters selected in step 402 according to the high layer signaling configuration. The adjustment value is specifically located in the first "information bit for transmitting power adjustment information" in the DCI, and then the current power adjustment value is extracted from the first "information bit for transmitting power adjustment information" in the DCI, that is, Extract the power adjustment value 1.

404. The user equipment A determines the actual power adjustment value according to the high-level signaling configuration. If the actual power adjustment value is obtained in the direct indication mode, and the current power adjustment value obtained before the user equipment A sends the SRS, And selecting, in the plurality of current power adjustment values, a last received power adjustment value as the actual power adjustment value; if the actual power adjustment value is obtained in an accumulation mode, and the current power acquired before transmitting the SRS, If there are multiple adjustment values, the sum of the plurality of current power adjustment values is taken as the actual power adjustment value.

For example, if the index value of the current power adjustment value determined in step 403 is 'Ό0', "01", "10", and "11", the current power corresponding to the direct indication mode is known by the lookup table 1. The specific values of the adjustment values are "-4","-1","1,, and "4", and the specific values of the current power adjustment values corresponding to the accumulation mode are "-1", "0", " Γ, and "3", if the acquisition mode of the actual power adjustment value is determined according to the high-level signaling configuration is the direct indication mode, the specific value of the actual power adjustment value f _ad (i) is "4"; If the configuration determines that the actual power adjustment value is obtained in the cumulative mode, Then the actual power adjustment value ^ (the specific value of 0 is "(-1) +0+1+4=4").

405. User equipment A calculates the transmit power of the SRS according to the actual power adjustment value obtained in step 404 and a set of power control parameters obtained in step 402, as follows:

^P _S R _S {i) ^{= min} { PcMAX ( , 101Og ₁₀ ( _GRS ) + P _{O PUSCH} (j) + « (j) - PL + f _ad (i)} ; where, represents the transmit power of the SRS, _ΜΑΧ ( 0 is the maximum transmit power of the user equipment, p _SRS —, _PUSCH ( ) and “ ( ) are parameters of the high-level configuration, M _srs is the bandwidth of the SRS, and PL is the path loss information measured by the user equipment.

406. Send the SRS to the target serving base station according to the transmit power of the SRS obtained in step 405. For example, if the target serving base station is the macro base station B, send the SRS to the macro base station according to the transmit power of the SRS obtained in step 406: 8.

It should be noted that, in this embodiment, the user equipment is selected according to the target serving base station as an example. It should be understood that the base station may directly indicate which set of power control parameters should be selected. I will not repeat them here. In addition, in this embodiment, the power adjustment information is transmitted by using the DCI as an example. It should be understood that the power adjustment information may also be transmitted by using MAC signaling, where the power adjustment information is carried by the MAC signaling. For details, refer to the second embodiment, and details are not described herein again.

It can be seen that the macro base station B in the embodiment of the present invention can transmit the power adjustment information including the two power adjustment values of the user equipment A to the user equipment A through the DCI signaling, and the target service base station is determined by the user equipment A, according to the target serving base station. Obtaining a corresponding set of power control parameters in the preset multiple sets of power control parameters, and then the macro base station B indicates that the user equipment selects the current power adjustment value by carrying the indication information in the high layer signaling, and then determines the actual power adjustment value, and finally The transmit power of the SRS is calculated according to the actual power adjustment value and the obtained set of power control parameters. Since the solution can calculate the transmit power of the SRS by using different power control parameters and actual power adjustment values for different target serving base stations, the transmit power of the SRS can only be calculated fixedly for one serving base station relative to the prior art. And can only send power adjustment values for one power control process, greatly improving Power control accuracy and flexibility of SRS under heterogeneous networks. Embodiment 6

In order to better implement the above method, the embodiment of the present invention further provides a user equipment. As shown in FIG. 5, the user equipment includes a receiving unit 501, a parameter selecting unit 502, an adjustment value selecting unit 503, a determining unit 504, and an adjusting unit. The receiving unit 501, the parameter selecting unit 502, the adjustment value selecting unit 503, the determining unit 504, and the adjusting unit 505 may be specifically located in the hardware processor;

The receiving unit 501 is configured to receive power adjustment information sent by the network side device.

The power adjustment information may specifically include at least one power adjustment value of the user equipment, and may further include other information related to power adjustment. The power adjustment value is specifically provided by a network side device such as a base station. In a specific implementation, the power adjustment information may only carry the power adjustment value provided by the target serving base station, or may carry the power adjustment value provided by multiple serving base stations, and then use the high-level signaling configuration to indicate which power adjustment value should be used. There are other ways, and there is no limit here.

a parameter selection unit 502, configured to select a group of power control parameters among the preset multiple sets of power control parameters;

The adjustment value selection unit 503 is configured to acquire, according to the indication information from the network side device, a current power adjustment value corresponding to the group of power control parameters selected by the parameter selection unit 502 in the at least one power adjustment value;

a determining unit 504, configured to determine an actual power adjustment value based on the current power adjustment value determined by the adjustment value selection unit 503;

The adjusting unit 505 is configured to adjust the transmit power of the SRS according to the actual power adjustment value determined by the determining unit 504 and a set of power control parameters selected by the parameter selection unit 502.

Each set of power control parameters means a power control flow, and each set of power control parameters may include a maximum transmit power of the user equipment (ie, _ΜΑΧ (0), a high-level configuration parameter (such as _RS ―. ET , P.— _PUSCH ( ) and “( )^ SRS bandwidth (ie M _SRS ) and path loss information (pathloss) measured by the user equipment.

The power control parameter may be selected according to a preset policy, where the preset policy is selected. It can be set according to the requirements of the actual application, for example, it can be selected by the user equipment according to the target serving base station, or can be selected according to the indication of the network device side, etc., as shown in the foregoing method embodiment, Let me repeat.

Optionally, when determining the actual power adjustment value, if the actual power adjustment value is not specified, the current power adjustment value is directly used as the actual power adjustment value, that is, f _ad (i) = S(iK) , where, represents the actual power adjustment value, indicating the current power adjustment value. Otherwise, if the actual power adjustment value is obtained, for example, the actual power adjustment value is obtained in the direct indication mode, or the actual power adjustment value is obtained in the accumulation mode. The method for obtaining the actual power adjustment value may be, for example, any one or more of the following:

(1) The first way:

The receiving unit 501 is further configured to learn, by using an indication of the high layer signaling, that the acquiring manner of the actual power adjustment value is a direct indication manner;

Then, the determining unit 504 is specifically configured to determine the current power adjustment value as the actual power adjustment value, that is, / _aii (o = - , where / _arf (0 represents the actual power adjustment value, indicating the current power adjustment value.

(2) The second way:

The receiving unit 501 is further configured to learn, by using an indication of the high layer signaling, that the obtained power adjustment value is obtained in an accumulation manner;

Then, the determining unit 504 is specifically configured to use the sum of the last actual power adjustment value and the current power adjustment value as the actual power adjustment value, ^f _aAi ) = f _aAi -l) + S(iK) , where , /J indicates the actual power adjustment value, ^ ( indicates the current power adjustment value, indicating the last actual power adjustment value.

In addition, the user equipment may receive multiple power adjustment values for it before sending the SRS. In this case, the third or fourth manner may also be used to obtain the actual power adjustment value. as follows:

(3) The third way:

The receiving unit 501 is further configured to learn, by using an indication of the high layer signaling, that the acquiring manner of the actual power adjustment value is a direct indication manner; Then, the determining unit 504 is specifically configured to: when the obtained current power adjustment value has multiple, select one of the plurality of current power adjustment values as the actual power adjustment value.

(4) The fourth way:

Then, the determining unit 504 is specifically configured to use the sum of the plurality of current power adjustment values as the actual power adjustment value when the acquired current power adjustment values have multiple.

For the methods for determining the actual power adjustment value, refer to the foregoing method embodiments, and details are not described herein.

In addition, during specific implementation, the power adjustment information may be transmitted through the MAC signaling, or may be transmitted on the PDCCH by using the DCI, that is,

The receiving unit 501 is specifically configured to receive power adjustment information transmitted by the network side device by using MAC signaling; or

The receiving unit 501 is specifically configured to receive power adjustment information transmitted by the network side device through the DCI. For example, the details can be as follows:

The receiving unit 501 is specifically configured to receive the first downlink DCI sent by the network side device, where the first DCI includes an information bit for transmitting power adjustment information, where the information bit is divided into at least two sub-information bits, each sub-information Bit carries a power adjustment value; or,

The receiving unit 501 is configured to receive a second DCI sent by the network side device, where the second DCI includes at least two information bits for transmitting power adjustment information, where each information bit carries a power adjustment value; or

The receiving unit 501 is specifically configured to receive a third DCI sent by the network side device, where the third DCI includes an information bit for transmitting power adjustment information, where the information bit carries a power adjustment value.

In addition, the DCI may carry the indication information in addition to the information bits for transmitting the power adjustment information, where the indication information is indicated by the SRS trigger information bit, that is,

The adjustment value selection unit 503 is specifically configured to acquire, according to the indication information in the DCI, a current power adjustment value corresponding to a group of power control parameters selected by the parameter selection unit 502 in at least one power adjustment value. Optionally, the indication information may be indicated by a PC-RNTI, in addition to being indicated by an SRS trigger information bit, that is,

If the indication information is implicitly included in the DCI, and the DCI is scrambled by using the PC-RNTI, the indication information may be indicated by the PC-RNTI. In this case, the user equipment may further include a descrambling unit;

a descrambling unit, configured to determine a current PC-RNTI by descrambling the DCI, to determine the indication information of the current PC-RNTI indication;

Then, the adjustment value selection unit 503 is configured to acquire, according to the indication information determined by the descrambling unit, a current power adjustment value corresponding to the group of power control parameters selected by the parameter selection unit 502 in the at least one power adjustment value.

Of course, in addition to carrying the indication information through the DCI, the indication information can also be obtained by other means, for example, through high-level signaling configuration, that is:

The receiving unit 501 is further configured to receive the high layer signaling sent by the network side device, where the high layer signaling carries the indication information.

In addition, in order to improve the transmission efficiency, the power adjustment information for the multiple user equipments may be carried in the DCI, and then the higher-level signaling configuration is used to inform the user equipment which location of the corresponding power adjustment information is specifically in the DCI. That is, if the power adjustment information includes other at least one power adjustment value of other user equipment, B'J:

The receiving unit 501 is further configured to receive, by the network side device, high layer signaling that carries the correspondence between the at least one power adjustment value and the user equipment;

Then, the adjustment value selection unit 503 is further configured to extract the at least one power adjustment value for the user equipment in the power adjustment information based on the correspondence between the at least one power adjustment value and the user equipment.

The user equipment may specifically be a device such as a mobile phone, a tablet computer or a laptop computer. The network side device may specifically be a base station (including an evolved base station), such as a serving macro base station or a serving micro base station, and if the user equipment has multiple serving base stations, the network side device may specifically be the multiple serving base stations. Any one of the base stations, for example, may be a downlink serving base station, where information provided by other serving base stations, such as a power adjustment value, may be transmitted to the serving base station through communication between the base stations (ie, the network) The network side device is transmitted by the serving base station (ie, the network side device) to the user equipment.

It should be noted that, in the specific implementation, each of the foregoing units may be implemented as a separate entity, or may be implemented in any combination, as the same or several entities. For the implementation of each of the foregoing units, refer to the foregoing method embodiments. This will not be repeated here.

It can be seen that the receiving unit 501 of the user equipment in the embodiment of the present invention can receive the power adjustment information that is sent by the network side device, including at least one power adjustment value of the user equipment, and the preset multiple power control parameters by the parameter selection unit 502. Selecting a set of power control parameters, and then obtaining, by the adjustment value selection unit 503, a current power adjustment value corresponding to the selected one of the power control parameters in the at least one power adjustment value based on the indication information from the network side device. And determining, by the determining unit 504, the actual power adjustment value based on the current power adjustment value, and finally adjusting, by the adjusting unit 505, the transmission power of the SRS according to the actual power adjustment value and the selected one of the power control parameters. Because the solution can select different power control parameters according to different preset policies, for different target serving base stations, or different control algorithms in the serving base station, and indicate the user equipment in multiple sets of power adjustments by using indication information. The power adjustment value is selected to adjust the transmit power of the SRS, so that the transmit power of the SRS can only be calculated fixedly for one serving base station, and only the power adjustment value for one power control process can be sent. In other words, the power control accuracy and flexibility of SRS in multi-point service technology networks, especially heterogeneous networks, are greatly improved. Example VII.

Correspondingly, the embodiment of the present invention further provides a network side device. As shown in FIG. 6, the network side device includes a determining unit 601 and a sending unit 602. The determining unit 601 and the sending unit 602 may be specifically located in the hardware processor.

a determining unit 601, configured to determine, in the at least one power adjustment value of the user equipment, a current power adjustment value corresponding to a group of power control parameters selected by the user equipment;

The sending unit 602 is configured to provide, to the user equipment, a power adjustment that includes at least one power adjustment value. Information, and indication information for indicating a current power adjustment value in the at least one power adjustment value. For example, the power adjustment information may be sent to the user equipment by using the MAC signaling, or the power adjustment information may be sent to the user equipment by using the DCI, that is,

The sending unit 601 is specifically configured to send power adjustment information to the user equipment by using MAC signaling; or

The sending unit 602 is specifically configured to send power adjustment information to the user equipment by using downlink control signaling. The indication information may be provided to the user equipment in multiple manners, for example, by using a high-level control signaling configuration to provide the user equipment, etc., or, if the power adjustment information is transmitted through the DCI, the DCI may also pass the DCI. To send the indication information to the user equipment. For example, you can use any of the following methods to obtain the indication information:

(2) indicated by PC-RNTI;

At this time, the network side device may further include a scrambling unit;

The scrambling unit is configured to scramble the DCI by using a PC-RNTI before transmitting the power adjustment information to the user equipment by using the DCI, so that the user equipment determines the current PC-RNTI by descrambling the DCI, and determines the For the indication information indicated by the current PC-RNTI, refer to the first embodiment, and details are not described herein again.

(3) indicated by high-level signaling configuration;

At this time, the sending unit 601 is further configured to send, to the user equipment, high layer signaling that carries the indication information.

In addition, in order to improve the transmission efficiency, the power adjustment information for the multiple user equipments may be carried in the DCI, and then the higher-level signaling configuration is used to inform the user equipment which location of the corresponding power adjustment information is specifically in the DCI. That is, if the power adjustment information also includes other at least one power adjustment value of other user equipments, Bay' J:

The sending unit 601 is further configured to: after the power adjustment information including the at least one power adjustment value is provided to the user equipment, provide the user equipment with high layer signaling that carries the correspondence between the at least one power adjustment value and the user equipment, so that the user equipment Extracting the at least one power adjustment for the user equipment in the power adjustment information according to the correspondence between the at least one power adjustment value and the user equipment Value.

The network side device may specifically be a base station (including an evolved base station), such as a serving macro base station or a serving micro base station.

It should be noted that, in the specific implementation, each of the foregoing units may be implemented as a separate entity, or may be implemented in any combination, as the same or several entities. For the implementation of each of the foregoing units, refer to the foregoing method embodiments. This will not be repeated here. Determining, in a power adjustment value, a current power adjustment value corresponding to a group of power control parameters selected by the user equipment, and then transmitting, by the sending unit 601, the power adjustment information including the at least one power adjustment value to the user equipment, and at least The indication information indicating the current power adjustment value in a power adjustment value, so that the user equipment can select the corresponding power adjustment value among the multiple power adjustment values for different power control parameters to adjust the transmission power of the SRS, thereby greatly improving the service at the multipoint Technical network, especially the power control accuracy and flexibility of SRS under heterogeneous networks.

In the base station and the user equipment in the seventh embodiment and the eighth embodiment, the function of each unit is specifically described in the description of the previous method flow, and details are not described herein. Example VIII.

Correspondingly, the embodiment of the present invention further provides a communication system, which includes any user equipment provided by the embodiment of the present invention. For the description of the user equipment, refer to the sixth embodiment. For example, the following may be specifically:

The user equipment is configured to receive power adjustment information sent by the network side device, where the power adjustment information includes at least one power adjustment value of the user equipment, and select a group of power control parameters from the preset multiple groups of power control parameters; And indicating, by the indication information of the side device, a current power adjustment value corresponding to the selected one of the power control parameters in the at least one power adjustment value; determining an actual power adjustment value based on the current power adjustment value; and adjusting the value according to the actual power And selecting a set of power control parameters to adjust the transmit power of the SRS.

There are a plurality of methods for determining the actual power adjustment value based on the current power adjustment value. For details, refer to the foregoing method embodiment, and details are not described herein again.

In addition, the transmission of power adjustment information can also be performed in various ways, for example, MAC can be used. Signaling is used for transmission, or DCI may be used for transmission on the PDCCH, and the like, that is, the user equipment is specifically configured to receive power adjustment information transmitted by the network side device through MAC signaling; or

The user equipment is specifically configured to receive power adjustment information transmitted by the network side device through the DCI. For details, refer to the foregoing embodiment, and details are not described herein.

In addition, the communication system may further include any network side device provided by the embodiment of the present invention. For details, refer to the seventh embodiment. For example, the following may be specifically:

a network side device, configured to determine, in at least one power adjustment value of the user equipment, a current power adjustment value corresponding to a group of power control parameters selected by the user equipment, where the user equipment selects a group of power control parameters by the user The device is selected from the preset multiple sets of power control parameters; the current power adjustment value and the set of selected power control parameters are used to adjust the transmit power of the measurement reference signal of the user equipment; The power adjustment information of the at least one power adjustment value, and the indication information used to indicate the current power adjustment value in the at least one power adjustment value are described in detail in the foregoing embodiments, and details are not described herein again.

It can be seen that the user equipment in the communication system of the embodiment of the present invention can receive power adjustment information that is sent by the network side device, including at least one power adjustment value of the user equipment, and select one set of power among the preset multiple sets of power control parameters. Controlling a parameter, and then, based on the indication information from the network side device, acquiring a current power adjustment value corresponding to the selected one of the power control parameters in the at least one power adjustment value, and determining an actual power adjustment based on the current power adjustment value Value, and finally adjust the transmit power of the SRS according to the actual power adjustment value and the selected set of power control parameters. Because the solution can select different power control parameters according to different preset policies, for different target serving base stations, or different control algorithms in the serving base station, and indicate the user equipment in multiple sets of power adjustments by using indication information. The power adjustment value is selected to adjust the transmit power of the SRS, so that the transmit power of the SRS can only be calculated fixedly for one serving base station, and only the power adjustment value for one power control process can be sent. In other words, the power control accuracy and flexibility of SRS in multi-point service technology networks, especially heterogeneous networks, are greatly improved. One of ordinary skill in the art can understand that all or part of the various methods of the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable In the storage medium, the storage medium may include: a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

The above description of the power control method, apparatus, and system of the SRS provided by the embodiments of the present invention is only for helping to understand the method and core idea of the present invention. Meanwhile, for those skilled in the art, The present invention is not limited by the scope of the present invention.

Claims

Rights request

1. A power control method for measuring reference signals, which is characterized by including:

Receive power adjustment information sent by the network side device, where the power adjustment information includes at least one power adjustment value of the user equipment;

Select a set of power control parameters from multiple preset sets of power control parameters;

Based on the instruction information from the network side device, obtain the current power adjustment value corresponding to the set of power control parameters from the at least one power adjustment value;

Determine the actual power adjustment value based on the current power adjustment value;

The transmit power of the measurement reference signal is adjusted according to the actual power adjustment value and the set of power control parameters.

2. The method according to claim 1, characterized in that, before receiving the power adjustment information sent by the network side device, further comprising:

The acquisition method of obtaining the actual power adjustment value is the direct instruction method through the instruction of high-level signaling from the network side device;

Then, determining the actual power adjustment value based on the current power adjustment value includes: determining the current power adjustment value as the actual power adjustment value based on a direct instruction method.

3. The method according to claim 1, characterized in that, before receiving the power adjustment information sent by the network side device, it further includes:

The acquisition method of the actual power adjustment value is learned through the instruction of high-level signaling from the network side device, which is the accumulation method;

Then, determining the actual power adjustment value based on the current power adjustment value includes: using the sum of the last actual power adjustment value and the current power adjustment value as the actual power adjustment value in a cumulative manner.

4. The method according to any one of claims 1 to 3, characterized in that the receiving the power adjustment information sent by the network side device includes:

Receive power adjustment information transmitted by the network side device through media access layer signaling; or receive power adjustment information transmitted by the network side device through downlink control signaling.

5. The method according to claim 4, characterized in that,

The downlink control signaling also includes the indication information, which is transmitted through the measurement reference signal. Number trigger information bit to indicate.

6. The method according to claim 4, characterized in that,

The downlink control signaling is scrambled using the wireless network temporary identity, and the indication information is indicated by the wireless network temporary identity;

Then, based on the instruction information from the network side device, before obtaining the current power adjustment value corresponding to the set of power control parameters from the at least one power adjustment value, the method includes: descrambling the downlink control signaling. The wireless network temporary identity is determined to determine the indication information indicated by the wireless network temporary identity.

7. The method according to any one of claims 1 to 4, characterized in that, before receiving the power adjustment information sent by the network side device, it further includes:

Receive high-level signaling carrying the indication information sent by the network side device.

8. The method according to any one of claims 1 to 7, characterized in that the power adjustment information also includes at least one other power adjustment value of other user equipment, then:

Before receiving the power adjustment information sent by the network side device, the method further includes: receiving high-level signaling sent by the network side device carrying the corresponding relationship between the at least one power adjustment value and the user equipment; the step based on the instruction from the network side device. Information, before obtaining the current power adjustment value corresponding to the set of power control parameters from the at least one power adjustment value, further comprising: based on the corresponding relationship between the at least one power adjustment value and the user equipment, in the power adjustment information extract the at least one power adjustment value for the user equipment.

9. The method according to any one of claims 1 to 8, wherein the adjusting the transmission power of the measurement reference signal according to the actual power adjustment value and the set of power control parameters includes: based on the following formula Calculate the transmit power of the measurement reference signal:

PsRS—OBFSET +lOlOgU + U '" {j) - PL + f{i) }; where _RS (0 is the transmit power of the measurement reference signal, p _CMA x (o is the maximum transmit power of the user equipment, p _SRS ―. _SET , ρ.— _PUSCT ( ) and ω are the set of power control parameters, M _srs is the bandwidth of the measurement reference signal, PL is the path loss information measured by the user equipment, and is the actual power adjustment value.

10. A power control method for measuring reference signals, characterized by including: Determine the current power adjustment value corresponding to a set of power control parameters selected by the user equipment from at least one power adjustment value of the user equipment. The set of power control parameters is selected by the user equipment from among multiple preset sets of power control parameters. Out; the current power adjustment value and the set of power control parameters are used to adjust the transmission power of the measurement reference signal of the user equipment;

Power adjustment information including at least one power adjustment value is provided to the user equipment, and indication information for indicating the current power adjustment value in the at least one power adjustment value.

11. The method according to claim 10, characterized in that: providing power adjustment information including at least one power adjustment value to the user equipment includes:

Send power adjustment information to user equipment through media access layer signaling; or,

Send power adjustment information to user equipment through downlink control signaling.

12. The method according to claim 11, characterized in that,

The downlink control signaling also includes the indication information, and the indication information is indicated by a measurement reference signal trigger information bit.

13. The method according to claim 11, wherein the indication information is indicated by a wireless network temporary identity, and before sending the power adjustment information to the user equipment through downlink control signaling, it further includes:

The wireless network temporary identity is used to scramble the downlink control signaling, so that the current power adjustment value is indicated in at least one power adjustment value through the wireless network temporary identity.

14. The method according to claim 10 or 11, characterized in that: providing the user equipment with power adjustment information including at least one power adjustment value, and indication information for indicating the current power adjustment value in the at least one power adjustment value. include:

Send high-layer signaling carrying the indication information to the user equipment;

Power adjustment information including at least one power adjustment value is provided to the user equipment.

15. The method according to any one of claims 10 to 14, wherein the power adjustment information also includes at least one other power adjustment value of other user equipment, then the providing the user equipment with at least one power adjustment value. The value before the power adjustment information also includes:

Provide user equipment with high-level signaling carrying a correspondence between the at least one power adjustment value and the user equipment, where the correspondence is used to indicate the user equipment in the power adjustment information. At least one power adjustment value.

16. A user equipment, characterized by: including:

A parameter selection unit, used to select a set of power control parameters from multiple preset sets of power control parameters;

An adjustment value selection unit, configured to obtain the current power adjustment value corresponding to the set of power control parameters from the at least one power adjustment value based on the instruction information from the network side device;

a determining unit, configured to determine the actual power adjustment value based on the current power adjustment value;

An adjustment unit, configured to adjust the transmission power of the measurement reference signal according to the actual power adjustment value and the set of power control parameters.

17. The user equipment according to claim 16, characterized in that,

The receiving unit is also configured to learn that the actual power adjustment value is obtained in a direct instruction manner through instructions from high-level signaling from the network side device;

The determining unit is specifically configured to determine the current power adjustment value as the actual power adjustment value based on the direct instruction method.

18. The user equipment according to claim 17, characterized in that,

The receiving unit is also configured to obtain instructions from network side equipment through high-level signaling to obtain the actual power adjustment value in a cumulative manner;

The determination unit is specifically configured to use the sum of the last actual power adjustment value and the current power adjustment value as the actual power adjustment value based on the accumulation method.

19. The user equipment according to any one of claims 16 to 18, wherein the receiving unit is specifically configured to receive power adjustment information transmitted by the network side device through media access layer signaling; or,

The receiving unit is specifically configured to receive power adjustment information transmitted by the network side device through downlink control signaling.

20. The user equipment according to claim 19, characterized in that, the downlink control signaling further includes the indication information, and the indication information is indicated by a measurement reference signal trigger information bit: The adjustment value selection unit is specifically configured to obtain the current power adjustment value corresponding to the set of power control parameters from the at least one power adjustment value based on the indication information in the downlink control signaling.

21. The user equipment according to claim 19, characterized in that, the downlink control signaling is scrambled using a wireless network temporary identity, and the indication information is indicated by the wireless network temporary identity, then it further includes: descrambling unit;

The descrambling unit is configured to determine the wireless network temporary identity by descrambling the downlink control signaling to determine the indication information indicated by the wireless network temporary identity;

The adjustment value selection unit is specifically configured to obtain the current power adjustment value corresponding to the set of power control parameters from the at least one power adjustment value according to the instruction information determined by the descrambling unit.

22. The user equipment according to any one of claims 16 to 19, characterized in that the receiving unit is further configured to receive high-layer signaling carrying the indication information sent by the network side device.

23. The user equipment according to any one of claims 16 to 22, characterized in that the power adjustment information also includes at least one other power adjustment value of other user equipment,

The receiving unit is also configured to receive high-level signaling sent by the network side device and carrying the corresponding relationship between the at least one power adjustment value and the user equipment;

The adjustment value selection unit is further configured to extract the at least one power adjustment value for the user equipment from the power adjustment information based on the corresponding relationship between the at least one power adjustment value and the user equipment.

24. The method according to any one of claims 16 to 23, characterized in that the adjustment unit is specifically configured to calculate the transmission power of the measurement reference signal based on the following formula:

m ⁱⁿ { CMAx '), PsRS—OBFSET + lOlOgU + U '" {j) - PL + f{i) }; where _RS (0 is the transmit power of the measurement reference signal, p _CMA x (o is the user equipment _The _maximum transmit _power _of information, is the actual power adjustment value.

25. A network side device, characterized by including:

A determining unit configured to determine, among at least one power adjustment value of the user equipment, a current power adjustment value corresponding to a set of power control parameters selected by the user equipment, the set of power control parameters being determined by the user equipment. The device selects from multiple preset sets of power control parameters; the current power adjustment value and the set of power control parameters are used to adjust the transmission power of the measurement reference signal of the user equipment;

A sending unit, configured to provide power adjustment information including at least one power adjustment value to the user equipment, and indication information used to indicate the current power adjustment value in the at least one power adjustment value.

26. The network side device according to claim 25, characterized in that,

The sending unit is specifically configured to send power adjustment information to user equipment through media access layer signaling; or,

The sending unit is specifically configured to send power adjustment information to the user equipment through downlink control signaling.

27. The network side device according to claim 26, characterized in that,

28. The network side device according to claim 26, wherein the indication information is indicated by a wireless network temporary identity, and further includes a scrambling unit;

A scrambling unit, configured to use the wireless network temporary identity identifier to scramble the downlink control signaling before sending the power adjustment information to the user equipment through the downlink control signaling, so that the wireless network temporary identity identifier can be used to transmit the power adjustment information to the user equipment. At least one power adjustment value indicates the current power adjustment value.

29. The network side device according to claim 25 or 26, characterized in that,

The sending unit is also configured to send high-layer signaling carrying the indication information to the user equipment.

30. The network side device according to any one of claims 25 to 29, characterized in that the power adjustment information also includes at least one other power adjustment value of other user equipment, namely:

The sending unit is further configured to provide the user equipment with high-level signaling carrying the corresponding relationship between the at least one power adjustment value and the user equipment before providing the user equipment with the power adjustment information including the at least one power adjustment value. The corresponding relationship is used to indicate the at least one power adjustment value for the user equipment in the power adjustment information.

31. A communication system, characterized by including any user equipment described in claims 16 to 24 and any network side device described in claims 25 to 30.