CN106912094A - A kind of method of Power Control and base station - Google Patents
A kind of method of Power Control and base station Download PDFInfo
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- CN106912094A CN106912094A CN201510973431.0A CN201510973431A CN106912094A CN 106912094 A CN106912094 A CN 106912094A CN 201510973431 A CN201510973431 A CN 201510973431A CN 106912094 A CN106912094 A CN 106912094A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
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Abstract
Method and base station the embodiment of the invention discloses a kind of Power Control.Methods described includes：Base station receives the detection reference signal SRS that user equipment (UE) sends；Signal Interference and Noise Ratio value is obtained according to SRS；When Signal Interference and Noise Ratio value is not in predetermined threshold interval range, it is determined that the transmission power of adjustment SRS；Configured information is sent to UE, the configured information can be that DCI message or state cache are reported.Wherein, configured information includes power bias status information, so that UE is according to power bias state information acquisition power bias value, and the transmission power of SRS is adjusted according to power bias value.The status information biased using DCI message or state cache report form transmit power, can greatly save system resource, meet message and substantially reduce.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of Power Control method and base station.
Background technology
ENodeB (Evolved Node B, abbreviation eNB, the title of base station in LTE) is using detection with reference to letter
Number (Sounding reference signal, abbreviation SRS) estimates the uplink signal-channel quality of different frequency range.
When user equipment (User Equipment, abbreviation UE) needs transmission upstream data, eNodeB sides
Scheduler can be according to " uplink channel status estimation ", by the preferable Resource Block of instantaneous channel state
The Physical Uplink Shared Channel that (Resource Block, abbreviation RB) distributes to UE is transmitted, while
Different configured transmissions can be selected (such as：Instantaneous data rates)；And selection correspondence upstream multi-antenna
Transmit related different parameters (i.e. for " upstream frequency is selectively dispatched ").SRS can also be used to estimate
Meter uplink time delay, and assuming that the mutually beneficial situation of descending/up channel, especially very duplexing (Time
Division Duplexing, abbreviation TDD) under pattern, down channel matter is estimated using channel symmetry
Amount.Under the Beamforming patterns of TDD, the channel information measured by SRS, it is possible to use up and down
The reciprocity of row channel carries out descending Beamforming weight computings.
In order to lift the accuracy of SRS measurement of correlations, Beamforming weights estimation precision is lifted, just
A SRS Poewr control method is needed, its cardinal principle is：
SRS power is reported to physical layer L1, L1 in eNodeB by the equal of filtered SRS by UE
Weighing apparatus front signal interference-to-noise ratio (signal to interference plus noise ratio, SINR) reports matchmaker
(Medium access control, abbreviation MAC) layer L2, L2 is in the SRS power control cycles for body intervention control
(1s) to when report value and target interval to compare according to L1, judge whether to need to update SRS and launch
The offset information of power, if necessary to update, eNodeB will send reallocation message and inform that UE (matches somebody with somebody again
Offset information of the message package containing SRS transmission powers), SRS transmittings of the UE according to included in the information
The offset information adjustment SRS transmission powers of power.The transmission power of UE be PUSCH transmission power and
The biasing sum of SRS transmission powers.In the prior art, LTE protocol regulation is by Downlink Control Information
(Downlink control information, DCI) controls PUSCH transmission powers, and SRS launches work(
The biasing of rate is then that eNodeB is sent in UE by RRC information.But RRC information takes up room
Larger, when user is more, the RRC information of required carrying transmission power biasing is relatively more, passes through
On-the-spot test finds that the RRC information of SRS Power Controls probably accounts for 5%~10% of general messages or so, greatly
The RRC information of amount will cause the substantial amounts of wasting of resources, influence the performance of system.
The content of the invention
Method and base station the invention provides a kind of Power Control, using DCI message or state cache
Be sent in UE for power bias and PUSCH power by the form of report, in order to UE to transmission power
It is adjusted.And utilize DCI message or state cache report form transmit power to bias, can be significantly
Saving system resource, meet message and substantially reduce.
In a first aspect, the invention provides a kind of method of Power Control, methods described includes：
Base station receives the detection reference signal SRS that UE sends, and it is dry to obtain signal according to the SRS signal
Disturb noise value；When Signal Interference and Noise Ratio value is not in predetermined threshold interval range, it is determined that adjustment SRS
Transmission power；And configured information is sent to UE, the configured information includes power bias status information,
In order to UE according to power bias state information acquisition power bias value, and adjusted according to power bias value
The transmission power of SRS.
With reference in a first aspect, in the first possible implementation of first aspect, the configured information is
Downlink Control Information.
Be sent to power bias status information in UE by the use of Downlink Control Information as configured information by base station,
So that UE determines power bias value according to power bias status information, and adjusted according to the power bias value
The transmission power of SRS.RRC information is replaced by Downlink Control Information DCI, substantial amounts of communication can be saved
Resource, improves the performance of system.
With reference to the first possible implementation of first aspect, in second possible reality of first aspect
In existing mode, Downlink Control Information includes the first form bit, and the first field is included in the first form bit, should
First field is used for indicated horsepower bias state information, wherein, the first field is extra in the first form bit
An increased field.
Only increase a field in the first form bit, by multiple information bit indicated works of the field
Rate bias state information, but bit number shared by the information bit of the field be far smaller than in RRC information 64
Position, is equally to greatly save resource, improves the performance of system.
With reference to the first possible implementation of first aspect, in the third possible reality of first aspect
In existing mode, Downlink Control Information includes the first form bit, comprising the first field and the in the first form bit
Two fields, it is that power bias status information or physical uplink are shared that the first field is used to indicate the second field
The power state information of channel PUSCH, wherein, the second field is present in itself in the first form bit
Field, rather than extra increased field.
The first field in the first form bit only includes an information bit, and the information bit is used to indicate second
The power state information of field indicated horsepower bias state information or PUSCH.Wherein the second field is in itself
Comprising two information bits, the numerical value of the two information bits is used to determining power bias state or PUSCH
Power rating.Hereby it is achieved that the time division multiplex of the power of power bias and PUSCH.Also, it is same
It is to replace RRC information to transmit power bias status information using DCI message, greatlys save the communication resource,
Improve letter general character energy.
With reference in a first aspect, in the 4th kind of possible implementation of first aspect, the instruction that UE sends
Information is buffer status report BSR, and wherein BSR includes media access control MAC；MAC's
One sub- head indicates the power bias status information of SRS.
Using BSR transmit power bias state information, and it is 24 bits that BSR message takes byte number,
64 byte bit numbers are taken relative to RRC information, is equally to save resource, improve the performance of system.
Second aspect, the invention provides a kind of base station, the base station includes：Receiver, uses for receiving
The detection reference signal SRS that family equipment UE sends；Processor, for obtaining signal interference according to SRS
Noise value；And when Signal Interference and Noise Ratio value is not in predetermined threshold interval range, it is determined that adjustment SRS
Transmission power；Transmitter, for sending configured information to UE, the configured information includes power bias
Status information, so as to facilitate UE according to power bias state information acquisition power bias value, and according to power
Bias adjusts the transmission power of SRS.
With reference to second aspect, in the first possible implementation of second aspect, base station is sent out to UE sides
The configured information sent is Downlink Control Information.
Be sent to power bias status information in UE by the use of Downlink Control Information as configured information by base station,
So that UE determines power bias value according to power bias status information, and adjusted according to the power bias value
The transmission power of SRS.RRC information is replaced by Downlink Control Information DCI, substantial amounts of communication can be saved
Resource, improves the performance of system.
With reference to the first possible implementation of second aspect, in second possible reality of second aspect
In existing mode, the Downlink Control Information includes the first field in the first form bit, described first
Field is used to indicate the power bias status information, wherein the first field is increased in the first form bit
One field.
Only increase a field in the first form bit, by multiple information bit indicated works of the field
Rate bias state information, but bit number shared by the information bit of the field be far smaller than in RRC information 64
Position, is equally to greatly save resource, improves the performance of system.
With reference to the first possible implementation of second aspect, in the third possible reality of second aspect
In existing mode, Downlink Control Information includes the first form bit, comprising the first field and the in the first form bit
Two fields, it is that power bias status information or physical uplink are shared that the first field is used to indicate the second field
The power state information of channel PUSCH, wherein, the second field is present in itself in the first form bit
Field, rather than extra increased field.
The first field in the first form bit only includes an information bit, and the information bit is used to indicate second
The power state information of field indicated horsepower bias state information or PUSCH.Wherein the second field is in itself
Comprising two information bits, the numerical value of the two information bits is used to determining power bias state or PUSCH
Power rating.Hereby it is achieved that the time division multiplex of the power of power bias and PUSCH.Also, it is same
It is to replace RRC information to transmit power bias status information using DCI message, greatlys save the communication resource,
Improve letter general character energy.
With reference to second aspect, in the 4th kind of possible implementation of second aspect, the instruction that UE sends
Information is buffer status report BSR, and wherein BSR includes media access control MAC；MAC's
One sub- head indicates the power bias status information of SRS.
Using BSR transmit power bias state information, and it is 24 bits that BSR message takes byte number,
64 byte bit numbers are taken relative to RRC information, is equally to save resource, improve the performance of system.
The method of a kind of Power Control provided in an embodiment of the present invention, by using DCI message or state
Be sent in UE for power bias status information and PUSCH power state informations by the form for caching report,
Power bias are determined according to power bias status information and PUSCH power state informations respectively in order to UE
The performance number of value and PUSCH, and transmission power is adjusted.And utilize DCI message or state
The status information of caching report form transmit power biasing, can greatly save system resource, make message
Meet and substantially reduce.
Brief description of the drawings
Fig. 1 is the system structure diagram of Power Control provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic flow sheet of the method for Power Control provided in an embodiment of the present invention；
Fig. 3 is the structured flowchart of base station provided in an embodiment of the present invention.
Specific embodiment
Below by drawings and Examples, the technical scheme of the embodiment of the present invention is done and is further retouched in detail
State.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with this hair
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
Embodiment provided by the present invention be mainly used in base station eNodeB 10 and user equipment (UE) 20 it
Between.As shown in figure 1, Fig. 1 is the system block diagram of Power Control provided in an embodiment of the present invention.Base station 10
Mainly include transmitter 101, processor 102 and receiver 103.UE 20 is it is determined that will be to eNodeB10
Before sending data, SRS information can be sent to eNodeB 10.When base station is true according to reference signal information
Channel quality reduction is determined, when the power bias of SRS signal change, it will notify that UE adjustment power is inclined
Put.It is specific as follows：
Receiver 101 in base station 10 receives the detection reference signal SRS of the transmissions of UE 20, treatment first
Device 102 then obtains Signal Interference and Noise Ratio value according to SRS.And also for judging Signal Interference and Noise Ratio
Whether it is worth in predetermined threshold interval range, when the Signal Interference and Noise Ratio value is not in predetermined threshold interval model
When enclosing interior, it is determined that the transmission power of adjustment SRS.Transmitter 103 then can send configured information to UE 20,
The configured information includes power bias status information, so that UE is according to power bias state information acquisition work(
Rate bias, and the transmission power of SRS is adjusted according to power bias value.
And the method and step that eNodeB 10 and UE 20 is specifically performed may be referred to the power shown in Fig. 2
The schematic flow sheet of the method for control.
Fig. 2 is a kind of schematic flow sheet 200 of the method for Power Control provided in an embodiment of the present invention, is such as schemed
Shown in 2, methods described comprises the following steps：
Step 210, base station receives the detection reference signal SRS that user equipment (UE) sends.
Step 220, base station obtains the Signal Interference and Noise Ratio value of the SRS according to SRS.
The specific process for obtaining Signal Interference and Noise Ratio value is prior art, is repeated no more here.
Step 230, when Signal Interference and Noise Ratio value is not in predetermined threshold interval range, it is determined that adjustment
The transmission power of SRS.
Specifically, after obtaining Signal Interference and Noise Ratio value, eNodeB first determines whether the Signal Interference and Noise Ratio
Whether it is worth in the interval range of predetermined threshold, when the ratio is in the interval range of predetermined threshold, will
It is left intact.And when the ratio is not in the interval range of predetermined threshold, it is determined that adjustment SRS
Transmission power.
It should be understood that when in the Signal Interference and Noise Ratio value no longer predetermined threshold interval range of SRS, explanation
The interference noise ratio of SRS signal changes, then illustrate channel quality reduction.Corresponding, SRS
The power bias value of the transmission power of signal will also change (before channel quality does not change,
Power bias value will be for 0).And the transmission power of SRS is the performance number and SRS signal of PUSCH
Power bias value sum, when power bias value changes, the power meeting naturally of corresponding SRS signal
Change.So eNodeB needs to inform that UE adjusts transmission power according to power bias value.
Step 240, configured information is sent to UE.
Specifically, when eNodeB determines to need to adjust the transmission power of SRS, it will send and indicate letter
Cease to UE, will be comprising power bias status information, so that UE is according to power bias shape in the configured information
State information determines power bias value, and the transmission power of SRS is adjusted according to the power bias value.
It can be Downlink Control Information to send configured information, or is buffer status report (Buffer Status
Report, BSR), wherein BSR includes media access control MAC, and a sub- head of MAC refers to
Show the power bias status information of SRS, so that UE determines power bias according to power bias status information
Value, and the transmission power of SRS is adjusted according to the power bias value.
Optionally, when configured information is Downlink Control Information, physics can also be included in the configured information
The power state information of up channel PUSCH, UE equally can be according to the power rating of the PUSCH
Information determines the performance number of PUSCH.The process of performance number of PUSCH is specifically determined compared with technology,
Here repeat no more.
And when configured information is BSR, the power state information of the PUSCH is again by descending control
Information processed sends.UE can equally determine the work(of PUSCH according to the power state information of the PUSCH
Rate value.The process of the specific performance number for determining PUSCH is repeated no more here compared with technology.
In first embodiment in the present embodiment, when the configured information is Downlink Control Information,
First form bit of DCI can be format0.I.e. Downlink Control Information includes being located in format0
The first field, the first field be used for indicated horsepower bias state information, wherein the first field is first
Extra increased field in form bit.
Specifically, the first field can include multiple information bits.Numerical value power in multiple information bits
Bias state information.
For example, the first field includes 4 information bits, i.e., shared byte number is 4bit.In information bit
Numerical value is binary number, therefore, illustrate that power bias state can include 0~15 this 16 kinds of states.
It should be noted that the span of power bias value is a scope being manually set, such as work(
The interval of rate biasing is [- 10.5,12].For narration is easy, in following several embodiments,
The interval range of power bias value is set as [- 10.5,12].
Therefore, each state one power bias value of correspondence in above-mentioned 16 kinds of introduced states.Tool
Body computing formula is as follows：
Wherein, n is n state, and n is less than or equal to 16.
For example：It is right therewith when 4 numerical value of information bit of the first field in format0 are 0000
The performance number answered is -10.5.If 4 numerical value of information bit are 0001, corresponding power bias value
For -9.
Or, when the first field includes 2 information bits, shared byte number is 2bit, then illustrate work(
Rate bias state can include 4 kinds of states.And the corresponding power bias value of each state can equally be used
The formula 2-2 of similar formula 2-1 is obtained.For example, when the numerical value of information bit is 10, then power bias
Value is：
(formula 2-2)
Optionally, first form bit of DCI can also be the format3 or format3A in DCI.
Increase a field i.e. in format3 or format3A.Specific embodiment as above states introduction
Implementation method is similar in format0, repeats no more here.
By increasing a field in first form bit of DCI, it is possible to by power bias status information
It is positioned in DCI and is sent to UE, so that UE determines power bias value according to the power bias status information,
And using power bias value and PUSCH performance numbers adjustment transmission power.And the byte number shared by the field
Several bits are also only, that is, are only the byte number for additionally increasing several bits, it is possible to transmit and passed to UE
Power offset information is sent, relative to the byte number of 64 bits shared by RRC information, is greatlyd save
The communication resource.
In second embodiment in embodiments of the present invention, when the configured information is Downlink Control Information
When, Downlink Control Information includes the first field and the second field that are located in format0, and the first field is used
In indicate the second field references be power bias status information or represent PUSCH power rating letter
Breath.Wherein, the first field is similar to in embodiment one, can be extra increased field, and the second word
Duan Ze is the field of itself presence in the first form bit.Now, the first field includes an information bit, example
The numerical value of information bit such as the first field is 0, it indicates that the second field references be PUSCH power shape
State information, when the numerical value of the information bit of the first field is 1, then illustrate the second field references is power bias
Status information.
It should be noted that the power state information of PUSCH is stored in the format0 of DCI format in itself
In second field of position, the performance number of PUSCH can be obtained using the power state information, it is specific to obtain
Process is prior art, is repeated no more here.Second field includes two information bits, each information bit
The byte number of occupancy is 1bit.However, in the present embodiment, the power state information and power of PUSCH
Bias state information will share this 2bit information bit, i.e. the second field to be used to indicate PUSCH power ratings to believe
Breath or indicated horsepower bias state information.When the information bit numerical value of the first field is 0, the second field
2bit information bits numerical value represent be PUSCH power state information；And when the information of the first field
When position is 1, then what the numerical value of the 2bit information bits in the second field was represented is power bias status information.
By the instruction of the first field the performance number and power bias value of PUSCH can be realized in the second field
In time division multiplex.
Similar with the first string, the numerical value of information bit said herein is binary number, and represents work(
A certain state in the power state information of rate bias state information or PUSCH.
For example, when the information bit of the first field is 1, and the numerical value of the 2bit information bits of the second field is respectively
1,1.Then illustrate the instruction of the second field is the 4th kind of state in power bias state.Power bias value
The computational methods in similar formula 2-2 can be equally utilized to obtain, power bias value is 12.And when first
The information bit of field is 0, and illustrate the instruction of the second field is the power bias state of PUSCH.And
The power acquisition methods of PUSCH are prior art, are repeated no more here.It should be understood that,
The power value-acquiring method of PUSCH is distinct from the acquisition methods of power bias value.Can not by the two it is mixed and
Tan Zhi.
In addition, though the first form bit in the present embodiment is only illustrated as a example by format0, by
Understood in first embodiment, the first form bit can also be format3 or format3A,
Specific embodiment is same as above, repeats no more here.
As can be seen that being only to increase a field in first form bit of DCI from the present embodiment,
And the field includes an information bit, it is only 1 bit to take byte number, it is possible to realize power bias
The time division multiplex of the power of status information and PUSCH, by base station by power bias status information and
The performance number of PUSCH is separately sent in UE, so as to UE according to the power bias status information and
PUSCH power adjusts transmission power.With respect to RRC information transmit power bias state information,
The communication resource is greatlyd save, the performance of system is improve.
In the 3rd embodiment in embodiments of the present invention, when base station sends DCI message to UE,
Above-mentioned first embodiment and second embodiment can be combined and used according to actual conditions.
By i.e. when the frequency of the demand of power bias is higher, base station can be set using the first embodiment,
Power offset information and PUSCH power are sent in UE simultaneously；And work as the demand amount of power bias
When relatively low, base station is reset using second embodiment, by power bias and PUSCH power timesharing point
Secondary is sent in UE, so as to realize the time division multiplex of power bias and PUSCH power.
Optionally, in the 4th embodiment of the embodiment of the present invention, when configured information is BSR,
BSR includes MAC, and a sub- head of MAC indicates the power bias status information of BSR.
Specifically, including Logic Channel Identifier (logical channel in a sub- head of MAC
Identifier, abbreviation LCID), according to the channel logo, UE can be determined in BSR information comprising BSR
Power bias status information.UE need to only receive the BSR message, and it is inclined that power is obtained from the message
Configuration state information, then determines power bias value according to the power bias status information, and inclined according to power
Put value adjustment transmission power.The specific method for obtaining power bias value is with class in the embodiment above 1
Seemingly, repeat no more here.
It should be noted that in above-mentioned introduced specific embodiment, power bias value is not
Only adjust once, but multiple adjustment is carried out according to actual conditions.Such as according in the first form bit
The length for adjusting the field of power bias status information is different, the precision of the power bias value that can be adjusted
It is not quite similar, such as when field length is 1bit, in can only representing the biasing target zone of [- 10.5,12]
- 10.5 and 12 two values, 2bits presses decile and can represent -10.5, -3,4.5,12 4 values.And 4 ratios
Spy is divided by decile, then can represent -10.5, -9, -7.5, -6, -4.5, -3, -1.5,0,1.5,3,
4.5th, 6,7.5,9,10.5 and 12 this 16 values.A kind of power bias of each power bias value correspondence
Status information.Because the power bias value of each adjustment is limited, therefore may need in a practical situation
Repeatedly adjusted.
The method of a kind of Power Control provided in an embodiment of the present invention, by using DCI message or state
Be sent in UE for power bias status information and PUSCH power state informations by the form for caching report,
Power bias are determined according to power bias status information and PUSCH power state informations respectively in order to UE
The performance number of value and PUSCH, and transmission power is adjusted.And utilize DCI message or state
The status information of caching report form transmit power biasing, can greatly save system resource, make message
Meet and substantially reduce.
Fig. 3 is architecture of base station block diagram provided in an embodiment of the present invention, as shown in figure 3, the base station includes：
Transmitting element 301, processing unit 302 and receiving unit 303.
Transmitting element 301, the detection reference signal SRS for receiving the transmissions of UE 20.
Processing unit 302, for obtaining Signal Interference and Noise Ratio value according to SRS；
When processing unit 302 determines Signal Interference and Noise Ratio value not in predetermined threshold interval range, also
Transmission power for adjusting SRS；
Transmitting element 303, for sending configured information to UE, the configured information includes power bias shape
State information, so that UE is according to power bias state information acquisition power bias value, and according to power bias value
Adjust the transmission power of SRS.
Specifically, transmitting element can be Downlink Control Information to the configured information that UE sends, or it is slow
State report (Buffer Status Report, BSR) is deposited, wherein BSR includes medium education
One sub- head of MAC, MAC indicates the power bias status information of SRS, so that UE is according to power
Bias state information determines power bias value, and the transmission power of SRS is adjusted according to the power bias value.
Optionally, when configured information is Downlink Control Information, physics can also be included in the configured information
The power state information of up channel PUSCH, UE equally can be according to the power rating of the PUSCH
Information determines the performance number of PUSCH.The process of performance number of PUSCH is specifically determined compared with technology,
Here repeat no more.
And when configured information is BSR, the power state information of the PUSCH is again by descending control
Information processed sends.UE can equally determine the work(of PUSCH according to the power state information of the PUSCH
Rate value.The process of the specific performance number for determining PUSCH is repeated no more here compared with technology.
In first embodiment in the present embodiment, when the configured information is Downlink Control Information,
First form bit of DCI can be format0.I.e. Downlink Control Information includes being located in format0
The first field, the first field be used for indicated horsepower bias state information, wherein the first field is first
Extra increased field in form bit.
Specifically, the first field can include multiple information bits.Numerical value power in multiple information bits
Bias state information.
For example, the first field includes 4 information bits, i.e., shared byte number is 4bit.In information bit
Numerical value is binary number, therefore, illustrate that power bias state can include 0~15 this 16 kinds of states.
It should be noted that the span of power bias value is a scope being manually set, such as work(
The interval of rate biasing is [- 10.5,12].For narration is easy, in following several embodiments,
The interval range of power bias value is set as [- 10.5,12].
Therefore, each state one power bias value of correspondence in above-mentioned 16 kinds of introduced states.Tool
Body computing formula is as follows：
Wherein, n is n state, and n is less than or equal to 16.
For example：It is right therewith when 4 numerical value of information bit of the first field in format0 are 0000
The performance number answered is -10.5.If 4 numerical value of information bit are 0001, corresponding power bias value
For -9.
Or, when the first field includes 2 information bits, shared byte number is 2bit, then illustrate work(
Rate bias state can include 4 kinds of states.And the corresponding power bias value of each state can equally be used
The formula 3-2 of similar formula 3-1 is obtained.For example, when the numerical value of information bit is 10, then power bias
Value is：
(formula 3-2)
Optionally, first form bit of DCI can also be the format3 or format3A in DCI.
Increase a field i.e. in format3 or format3A.Specific embodiment as above states introduction
Implementation method is similar in format0, repeats no more here.
By increasing a field in first form bit of DCI, it is possible to by power bias status information
It is positioned in DCI and UE is sent to by transmitting element 303, so that UE believes according to the power bias state
Breath determines power bias value, and using power bias value and PUSCH performance numbers adjustment transmission power.And be somebody's turn to do
Byte number shared by field is also only several bits, that is, be only the byte number for additionally increasing several bits,
Can just transmit to UE delivering power offset informations, relative to the word of 64 bits shared by RRC information
Joint number, greatlys save the communication resource.
In second embodiment in embodiments of the present invention, when the configured information is Downlink Control Information
When, Downlink Control Information includes the first field and the second field that are located in format0, and the first field is used
In indicate the second field references be power bias status information or represent PUSCH power rating letter
Breath.Wherein, the first field is similar to in embodiment one, can be extra increased field, and the second word
Duan Ze is the field of itself presence in the first form bit.Now, the first field includes an information bit, example
The numerical value of information bit such as the first field is 0, it indicates that the second field references be PUSCH power shape
State information, when the numerical value of the information bit of the first field is 1, then illustrate the second field references is power bias
Status information.
It should be noted that the power state information of PUSCH is stored in the format0 of DCI format in itself
In second field of position, the performance number of PUSCH can be obtained using the power state information, it is specific to obtain
Process is prior art, is repeated no more here.Second field includes two information bits, each information bit
The byte number of occupancy is 1bit.However, in the present embodiment, the power state information and power of PUSCH
Bias state information will share this 2bit information bit, i.e. the second field to be used to indicate PUSCH power ratings to believe
Breath or indicated horsepower bias state information.When the information bit numerical value of the first field is 0, the second field
2bit information bits numerical value represent be PUSCH power state information；And when the information of the first field
When position is 1, then what the numerical value of the 2bit information bits in the second field was represented is power bias status information.
By the instruction of the first field the performance number and power bias value of PUSCH can be realized in the second field
In time division multiplex.
Similar with the first string, the numerical value of information bit said herein is binary number, and represents work(
A certain state in the power state information of rate bias state information or PUSCH.
For example, when the information bit of the first field is 1, and the numerical value of the 2bit information bits of the second field is respectively
1,1.Then illustrate the instruction of the second field is the 4th kind of state in power bias state.Power bias value
The computational methods in similar formula 3-2 can be equally utilized to obtain, power bias value is 12.And when first
The information bit of field is 0, and illustrate the instruction of the second field is the power bias state of PUSCH.And
The power acquisition methods of PUSCH are prior art, are repeated no more here.It should be understood that,
The power value-acquiring method of PUSCH is distinct from the acquisition methods of power bias value.Can not by the two it is mixed and
Tan Zhi.
In addition, though the first form bit in the present embodiment is only illustrated as a example by format0, by
Understood in first embodiment, the first form bit can also be format3 or format3A,
Specific embodiment is same as above, repeats no more here.
As can be seen that being only to increase a field in first form bit of DCI from the present embodiment,
And the field includes an information bit, it is only 1 bit to take byte number, it is possible to realize power bias
The time division multiplex of the power of status information and PUSCH, it is by the transmitting element 303 in base station that power is inclined
The performance number of configuration state information and PUSCH is separately sent in UE, so that UE is according to the power bias
Status information and PUSCH power adjustment transmission power.Biased with respect to RRC information transmit power
Status information, greatlys save the communication resource, improves the performance of system.
In the 3rd embodiment in embodiments of the present invention, when base station sends DCI message to UE,
Above-mentioned first embodiment and second embodiment can be combined and used according to actual conditions.
By i.e. when the frequency of the demand of power bias is higher, base station can be set using the first embodiment,
Power offset information and PUSCH power are sent in UE simultaneously；And work as the demand amount of power bias
When relatively low, base station is reset using second embodiment, by power bias and PUSCH power timesharing point
Secondary is sent in UE, so as to realize the time division multiplex of power bias and PUSCH power.
Optionally, in the 4th embodiment of the embodiment of the present invention, when configured information is BSR,
BSR includes MAC, and a sub- head of MAC indicates the power bias status information of BSR.
Specifically, including Logic Channel Identifier (logical channel in a sub- head of MAC
Identifier, abbreviation LCID), according to the channel logo, UE can be determined in BSR information comprising BSR
Power bias status information.UE need to only receive the BSR message, and it is inclined that power is obtained from the message
Configuration state information, then determines power bias value according to the power bias status information, and inclined according to power
Put value adjustment transmission power.The specific method for obtaining power bias value is with class in the embodiment above 1
Seemingly, repeat no more here.
It should be noted that in above-mentioned introduced specific embodiment, power bias value is not
Only adjust once, but multiple adjustment is carried out according to actual conditions.Such as according in the first form bit
The length for adjusting the field of power bias status information is different, the precision of the power bias value that can be adjusted
It is not quite similar, such as when field length is 1bit, in can only representing the biasing target zone of [- 10.5,12]
- 10.5 and 12 two values, 2bits presses decile and can represent -10.5, -3,4.5,12 4 values.And 4 ratios
Spy is divided by decile, then can represent -10.5, -9, -7.5, -6, -4.5, -3, -1.5,0,1.5,3,
4.5th, 6,7.5,9,10.5 and 12 this 16 values.A kind of power bias of each power bias value correspondence
Status information.Because the power bias value of each adjustment is limited, therefore may need in a practical situation
Repeatedly adjusted.
Base station provided in an embodiment of the present invention, by using the form that DCI message or state cache are reported
Power bias status information and PUSCH power state informations are sent in UE, are distinguished in order to UE
Power bias value and PUSCH are determined according to power bias status information and PUSCH power state informations
Performance number, and transmission power is adjusted.And utilize DCI message or state cache report form to send out
The status information of power bias is sent, system resource can be greatly saved, is met message and is substantially reduced.
Professional should further appreciate that, be described with reference to the embodiments described herein
The unit and algorithm steps of each example, can be come with electronic hardware, acquisition machine software or the combination of the two
Realize, in order to clearly demonstrate the interchangeability of hardware and software, in the above description according to function
Generally describe the composition and step of each example.These functions are come with hardware or software mode actually
Perform, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can be to every
Described function is realized in individual specific application using distinct methods, but it is this realize it is not considered that
It is beyond the scope of this invention.
The step of method or algorithm for being described with reference to the embodiments described herein, can use hardware, treatment
The software module that device is performed, or the two combination is implemented.Software module can be placed in random access memory
(RAM), internal memory, read-only storage (ROM), electrically programmable ROM, electrically erasable
It is known any in ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In the storage medium of other forms.
Above-described specific embodiment, is carried out to the purpose of the present invention, technical scheme and beneficial effect
Further describe, should be understood that the foregoing is only specific embodiment of the invention and
, the protection domain being not intended to limit the present invention, it is all within the spirit and principles in the present invention, done
Any modification, equivalent substitution and improvements etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of method of Power Control, it is characterised in that methods described includes：
Base station receives the detection reference signal SRS that user equipment (UE) sends；
Signal Interference and Noise Ratio value is obtained according to the SRS；
When the Signal Interference and Noise Ratio value is not in predetermined threshold interval range, it is determined that adjusting the SRS
Transmission power；
Configured information is sent to the UE, the configured information includes power bias status information, so as to
The UE according to the power bias state information acquisition power bias value, and according to the power bias value
Adjust the transmission power of the SRS.
2. method according to claim 1, it is characterised in that the configured information is descending control
Information.
3. method according to claim 2, it is characterised in that the Downlink Control Information includes position
The first field in the first form bit, first field is used to indicate the power bias status information,
Wherein described first field is an increased field in first form bit.
4. the method according to right 2, it is characterised in that the Downlink Control Information includes being located at the
The first field and the second field in one form bit, it is described that first field indicates second field
The power state information of power bias status information or Physical Uplink Shared Channel PUSCH, wherein described
Second field is the field that first form bit is included in itself.
5. method according to claim 1, it is characterised in that the configured information is buffer status
Report BSR, wherein the BSR includes media intervention control MAC；One sub- head of the MAC
Indicate the power bias status information of SRS.
6. a kind of base station, it is characterised in that the base station includes：
Receiver, the detection reference signal SRS for receiving user equipment (UE) transmission；
Processor, for obtaining Signal Interference and Noise Ratio value according to the SRS；
When the Signal Interference and Noise Ratio value is not in predetermined threshold interval range, it is determined that adjusting the SRS
Transmission power；
Transmitter, for sending configured information to the UE, the configured information includes power bias shape
State information, so that the UE is according to the power bias state information acquisition power bias value, and according to institute
State the transmission power that power bias value adjusts the SRS.
7. base station according to claim 6, it is characterised in that the configured information is descending control
Information.
8. base station according to claim 7, it is characterised in that the Downlink Control Information includes position
The first field in the first form bit, first field is used to indicate the power bias status information,
Wherein described first field is an increased field in first form bit.
9. the base station according to right 7, it is characterised in that the Downlink Control Information includes being located at the
The first field and the second field in one form bit, it is described that first field indicates second field
The power state information of power bias status information or Physical Uplink Shared Channel PUSCH, wherein described
Second field is the field that first form bit is included in itself.
10. base station according to claim 6, it is characterised in that the configured information is caching shape
State reports BSR, wherein the BSR includes media intervention control MAC；One son of the MAC
Head indicates the power bias status information of SRS.
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| CN201510973431.0A CN106912094A (en) | 2015-12-22 | 2015-12-22 | A kind of method of Power Control and base station |
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| CN201510973431.0A CN106912094A (en) | 2015-12-22 | 2015-12-22 | A kind of method of Power Control and base station |
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| WO2019057083A1 (en) * | 2017-09-20 | 2019-03-28 | 中国移动通信有限公司研究院 | Transmission method, receiving method, base station, and terminal for control information |
| WO2021012091A1 (en) * | 2019-07-19 | 2021-01-28 | Lenovo (Beijing) Limited | Methods and apparatuses of power control for additional srs |
| WO2022077162A1 (en) * | 2020-10-12 | 2022-04-21 | Qualcomm Incorporated | Srs power control methods for channel estimation of reconfigurable intelligent surface link |
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