CN110233650A - Power regulating method and system in a kind of MIMO-NOMA system - Google Patents
Power regulating method and system in a kind of MIMO-NOMA system Download PDFInfo
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- CN110233650A CN110233650A CN201910383034.6A CN201910383034A CN110233650A CN 110233650 A CN110233650 A CN 110233650A CN 201910383034 A CN201910383034 A CN 201910383034A CN 110233650 A CN110233650 A CN 110233650A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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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
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
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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
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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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- 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
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides power regulating method in a kind of MIMO-NOMA system.This method comprises: determining the down initial power of each user on every RE according to the path loss of downlink every RE power and each user；The CQI of each reporting of user is adjusted the down initial power of each user based on the received.The distribution of the descending power of each user of the application meets the demodulation requirement of receiver user, so that user be allow to modulate signals into out, and improves the spectrum efficiency of system, increases the access capacity of system.
Description
Technical field
The invention belongs to power regulating method and systems in mobile communication field more particularly to a kind of MIMO-NOMA system.
Background technique
As intelligent terminal popularization and application and mobile new business demand sustainable growth, wireless transmission rate demand exponentially increase
It is long, broader practice prospect is provided for 5G.Compared with 4G, spectrum efficiency, transmission rate and system, which will be substantially improved, in 5G holds
Amount, realizes the sustainable development of mobile communications network.
The appearance of each Generation Mobile Communication System, all along with the innovation of multiple access technique.(non-orthogonal multiple connects NOMA
Enter technology) power domain is changed to by single user is exclusive by multiple users share, to greatly improve spectrum efficiency, thus NOMA at
For one of the key technology in 5G；MIMO (Multiple-Input Multiple-Output) technology obtains in 4G extensively
Using MIMO realizes multiple-input multiple-output by mutiple antennas, takes full advantage of space resources, improves spectrum efficiency, power system capacity
And transmission reliability.
Therefore, in order to further promote the spectrum efficiency of communication system, NOMA and MIMO is combined into 5G at present and ground
Study carefully one of the hot spot technology in field.In MIMO-NOMA system, communication equipment is assembled with multiple antennas, and user also includes multiple groups, because
It is the pass in MIMO-NOMA system that how this, which solves different user in the power control of uplink transmitting data and downlink reception data,
One of key problem.Power control is fitted on the basis of the indexs such as the received signal strength of receiving end and signal-to-noise ratio are assessed
When change transmission power to compensate the path loss and decline in wireless channel, thus guarantee user communication quality premise
Under, the reduction transmission power of bottom line, and interference will not be generated to other users in radio resource, increase power system capacity.
But existing power regulating method is mainly according to current channel condition in MIMO-NOMA system, using default
The mathematical methods such as the formula set or graph theory, theoretical calculation distribute to the power of each user, this power regulating method
Although simple, in Practical Project exploitation using relatively difficult, it is this and when uplink and downlink channel estimation inaccuracy
Power regulating method error is larger, may make receiver that can not correctly demodulate the signal of corresponding user.
Summary of the invention
Therefore, it is an object of the invention to overcome the defect of the above-mentioned prior art, function in a kind of MIMO-NOMA system is provided
Rate method of adjustment and system.
The purpose of the present invention is what is be achieved through the following technical solutions:
On the one hand, the present invention provides power regulating methods in a kind of MIMO-NOMA system, comprising:
According to the path loss of downlink every RE power and each user, the down initial power of each user on every RE is determined；
The CQI of each reporting of user is adjusted the down initial power of each user based on the received.
In the above method, according to the path loss of downlink every RE power and each user, the downlink of each user on every RE is determined
Initial power, comprising:
The down initial power of first user is greater than the down initial power of remaining user and the solution pitch of receiver user
The sum of limit；The path loss of first user is less than remaining user；
The down initial power of remaining each user and the difference of corresponding path loss are greater than coverage threshold；
The sum of down initial power of different user is equal to every RE power on every RE.
In the above method, the CQI of each reporting of user adjusts the down initial power of each user based on the received
It is whole, comprising:
Determine whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, under each user
Row initial power is adjusted.
In the above method, the first user and second user are multiplexed on every RE；
Correspondingly, determining whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, to each
The down initial power of user is adjusted, comprising:
Whether determine has P CQI value to be less than low threshold in N number of CQI value that the first user and second user report, if
It is when determining that first user's received signal intensity is greater than the signal strength of second user, by the down initial function of the first user
Rate increases by the first preset value, and the down initial power of second user is reduced by the first preset value；Determine the received letter of the first user
When number intensity is less than the signal strength of second user, the down initial power of the first user is reduced by the first preset value, by second
The down initial power of user increases by the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
Alternatively, having whether P CQI value is greater than low threshold, and second user in N number of CQI value of determining first reporting of user
Have whether P CQI value is less than low threshold in the N number of CQI value reported, if so, the down initial power of the first user is reduced
The down initial power of second user is increased by the first preset value by the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
Alternatively, having whether P CQI value is less than low threshold, and second user in N number of CQI value of determining first reporting of user
Have whether P CQI value is greater than low threshold in the N number of CQI value reported, if so, the down initial power of the first user is increased
The down initial power of second user is reduced by the first preset value by the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
In the above method, the CQI of each reporting of user carries out the descending power for distributing to each user based on the received
Before adjustment, further includes:
Current time slots are judged whether within the power adjustment period, if it is, executing each reporting of user based on the received
The CQI the step of descending power for distributing to each user is adjusted.
In the above method, further includes:
User terminal is true according to the downlink channel condition information reference signal power and down initial power sharing ratio of base station
The downlink channel condition information reference signal power of fixed each user；
User terminal calculates each user's according to the downlink channel condition information reference signal power and path loss of each user
Downlink signal-to-noise ratio；
Multiple SINR of each user are mapped as corresponding CQI by user terminal, and CQI is sent to base station.
On the other hand, the present invention provides power adjustment systems in a kind of MIMO-NOMA system, comprising:
First determining module determines on every RE under each user according to the path loss of downlink every RE power and each user
Row initial power；
Second determining module, for the downlink channel condition information reference signal power and down initial power according to base station
Allocation proportion determines the downlink channel condition information reference signal power of each user；
Computing module calculates every for the downlink channel condition information reference signal power and path loss according to each user
The downlink signal-to-noise ratio of a user；
CQI for multiple SINR of each user to be mapped as corresponding CQI, and is sent to adjustment mould by mapping block
Block；
Module is adjusted, the CQI for each reporting of user based on the received carries out the down initial power of each user
Adjustment.
Another aspect, the present invention provides a kind of electronic equipment, comprising:
Processor；
For storing the memory of the processor-executable instruction；
The executable instruction makes the processor execute above-mentioned MIMO-NOMA system when being run by the processor
Power regulating method in system.
In another aspect, computer program instructions are stored thereon with the present invention provides a kind of computer readable storage medium,
The computer program instructions make the processor execute power in the MIMO-NOMA system when being run by processor
Method of adjustment.
Compared with the prior art, the advantages of the present invention are as follows:
1) embodiment of the present invention determines on every RE under each user according to the path loss of downlink every RE power and each user
Row initial power, then the CQI of each reporting of user is adjusted the down initial power of each user based on the received, makes
The distribution for obtaining the descending power of each user meets the demodulation requirement of receiver user, so that receiver user be made to modulate signals into
Out, and the spectrum efficiency of system is improved, increases the access capacity of system.
2) user terminal of the embodiment of the present invention is according to the downlink channel condition information reference signal power and down initial of base station
Power sharing ratio determines the downlink channel condition information reference signal power of each user, and then user terminal is according to each user
Downlink channel condition information reference signal power and path loss, calculate the downlink signal-to-noise ratio of each user, end user end will be every
Multiple SINR of a user are mapped as corresponding CQI, and CQI is sent to base station, make base station according to CQI under each user
Row initial power is adjusted, so that the distribution of the descending power of each user meets the demodulation requirement of receiver user, thus
Allow receiver user to modulate signals into out, and improve the spectrum efficiency of system, increases the access capacity of system.
Detailed description of the invention
Embodiments of the present invention is further illustrated referring to the drawings, in which:
Fig. 1 is MIMO-NOMA system model schematic diagram；
Fig. 2 is power regulating method flow diagram in a kind of MIMO-NOMA system provided in an embodiment of the present invention；
Fig. 3 is power adjustment system structural schematic diagram in a kind of MIMO-NOMA system provided in an embodiment of the present invention；
Fig. 4 is power adjustment system structural schematic diagram in another kind MIMO-NOMA system provided in an embodiment of the present invention；
Fig. 5 is a kind of electronic equipment structural schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, and are passed through below in conjunction with attached drawing specific real
Applying example, the present invention is described in more detail.It should be appreciated that described herein, specific examples are only used to explain the present invention, and
It is not used in the restriction present invention.
Fig. 1 is MIMO-NOMA system model schematic diagram, wherein Fig. 1 (a) is uplink transmission process schematic diagram, and Fig. 1 (b) is
Uplink receiving process schematic, Fig. 1 (c) are downlink transmission process schematic diagram, and Fig. 1 (d) is downlink reception process schematic.
As shown in Fig. 1 (a), the information that different user generates first passes around channel coding, modulation, then reflects using layer
It penetrates, precoding to different antennae, is finally sent by PDMA coding, OFDM modulation；
As shown in Fig. 1 (b), after base station receives the signal of different user, by OFDM demodulation, then examined using PDMA
It surveys, space-time decoding, demodulation, Channel Detection first detected prominent subscriber signal, then again by the subscriber signal
It eliminates, detects the signal of other users respectively；
As shown in Fig. 1 (c), different user signal channel is encoded, is modulated by base station, is then mapped, is prelisted using layer
Code arrives different antennae port, encodes the signal of different user using PDMA in the same resource unit (Resource
Element, hereinafter referred to as RE) multiplexing, finally sent by OFDM modulation；
As shown in Fig. 1 (d), user receives the signal of different antennae, first passes around OFDM demodulation, then multi-purpose by PDMA
Family detection, space-time decoding, demodulation recover signal finally by channel decoding procedures.Wherein, PDMA Multiuser Detection mistake
Cheng Zhongxian detected high-power user, stop detecting if the signal is this subscriber signal；Otherwise, it will detect
High-power subscriber signal out is eliminated from reception signal, is continued to test.
Various specific embodiments of the invention are described below in detail:
Fig. 2 is power regulating method flow diagram in a kind of MIMO-NOMA system provided in an embodiment of the present invention, is such as schemed
Shown in 2, this method comprises:
101, according to the path loss of downlink every RE power and each user, the down initial function of each user on every RE is determined
Rate；
In NOMA-MIMO system, each RE has multiple users to be multiplexed, and does not define how the difference to every RE in 3GPP agreement
The descending power of user is allocated, and the embodiment of the present invention illustrates how two use to every RE so that every RE is multiplexed two users as an example
The descending power at family is allocated.
In 3GPP agreement, setting the every RE power of row is PRE,Wherein NBSFor antenna for base station,For the power of the every RE of downlink single antenna,Wherein,Power is sent for base station maximum,
Δ f is carrier wave interval,For downlink RB number,For every RB carrier number.
Assuming that first user's path loss is less than second user path loss, every RE different user down initial power distribution needs to meet:
The down initial power of first user is greater than the down initial power of remaining user and the solution pitch of receiver user
The sum of limit；The path loss of first user is less than remaining user；
The down initial power of remaining each user and the difference of corresponding path loss are greater than coverage threshold；
The sum of down initial power of different user is equal to every RE power on every RE.
For example, setting PL1For the path loss of the first user, PL2For the path loss of second user, Pdown1At the beginning of downlink for the first user
Beginning power, Pdown2For the down initial power of second user, work as PL1< PL2When
Wherein, αThrFor user's SIC demodulation threshold signal level of receiver, βThrFor coverage threshold.
Similarly, if second user path loss is less than first user's path loss, i.e. PL1> PL2, every RE different user down initial function
Rate distribution needs to meet:
If there are three users on every RE, work as PL1< PL2, PL1< PL3When
Wherein, Pdown3For the down initial power of third user, and so on, it can be obtained on every RE under multiplexing multiple-user
The distribution of row initial power.
Assume that base station is two antennas in the embodiment of the present invention, base station maximum transmission power is 46dBm, and downlink signal bandwidth is
20MHz, then the base station include 100RB, every RB include 12 RE, if every RE multiplexing two users path loss be respectively 80dB and
95dB, then PREFor PRE=46dBm-10log (100*12)=15dBm
If user's SIC demodulation threshold signal level of receiver αThrFor 6dB, coverage threshold βThrFor -110dBm, the path loss of the first user
PL1For 80dB, the path loss PL of second user2For 95dB, then basisThe first user and second is obtained to use
The down initial power at family, Pdown1=12, Pdown2=3.
Further, the embodiment of the invention also includes:
A, user terminal is according to the downlink channel condition information reference signal power and down initial power sharing ratio of base station
Determine the downlink channel condition information reference signal power of each user；
The embodiment of the present invention continues to be illustrated so that every RE is multiplexed two users as an example, if PCRSFor the down channel of base station
State information reference signals,For descending power allocation proportion,It can be obtained with step 101 in method according to figure 1,
PCRS, 1For the downlink channel condition information reference signal of the first user, PCRS, 2Join for the downlink channel condition information of second user
Signal is examined, then
B, user terminal calculates each user according to the downlink channel condition information reference signal power and path loss of each user
Downlink signal-to-noise ratio；
If SINR1For the downlink signal-to-noise ratio of the first user, SINR2For the downlink signal-to-noise ratio of second user, work as Prx1> Prx2
When, the SIC receiver of the first user and second user first demodulates the signal of the first user, and then re-demodulation goes out second user
Signal, then
Wherein, Iother1Interference information for the other cells of downlink to the first user, Iother2It is the other cells of downlink to
The interference information of two users, No,1Bottom for the first user is made an uproar, No,2It makes an uproar for the bottom of second user.
Similarly, work as Prx1< Prx2When, then
C, multiple SINR of each user are mapped as corresponding CQI by user terminal, and CQI is sent to base station, make base station
It is adjusted according to down initial power of the CQI to each user.
Table 1 is the CQI table of 4-bit in 3GPP agreement, and as shown in table 1, CQI has 16 kinds, i.e., channel quality be quantized into 0~
15 serial number, each CQI correspond to a kind of modulation coding scheme, may thereby determine that the corresponding descending power of each user.
Table 1
102, the CQI of each reporting of user is adjusted the down initial power of each user based on the received.
It should be noted that the adjustment of descending power is determined by base station, and base station is as transmitting terminal, it is not clear that channel item
How is part, and therefore, base station is adjusted the down initial power of each user according to the CQI for receiving reporting of user, obtains every
The final descending power of a user.
The process that base station is adjusted the down initial power of user is detailed below:
Determine whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, under each user
Row initial power is adjusted.
Specifically, it is determined that whether there is P CQI value to be less than low door in N number of CQI value that the first user and second user report
Limit, if so, when determining that first user's received signal intensity is greater than the signal strength of second user, it will be under the first user
The down initial power of second user is reduced by the first preset value by the first preset value of row initial power；
When determining that first user's received signal intensity is less than the signal strength of second user, by the downlink of the first user
Initial power reduces by the first preset value, and the down initial power of second user is increased by the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
Alternatively, having whether P CQI value is greater than low threshold, and second user in N number of CQI value of determining first reporting of user
Have whether P CQI value is less than low threshold in the N number of CQI value reported, if so, the down initial power of the first user is reduced
The down initial power of second user is increased by the first preset value by the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
Alternatively, having whether P CQI value is less than low threshold, and second user in N number of CQI value of determining first reporting of user
Have whether P CQI value is greater than low threshold in the N number of CQI value reported, if so, the down initial power of the first user is increased
The down initial power of second user is reduced by the first preset value by the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
In the embodiment of the present invention, the first preset value can be one or more step-lengths, specifically can be according to power adjustment
Speed is arranged the first preset value, and the present invention is not especially limit this.
Table 2 is according to CQI to the adjustment table of down initial power, wherein CQI1For the CQI of the first reporting of user, CQI2For
The CQI that second user reports, CQIThr1For CQI1Low threshold, CQIThr2For CQI2Low threshold, Prx1For the first user reception
Signal strength, Prx2For second user received signal intensity.
Table 2
Further, the CQI of each reporting of user adjusts the descending power for distributing to each user based on the received
Before whole, further includes:
Current time slots are judged whether within the power adjustment period, if it is, executing each reporting of user based on the received
The CQI the step of descending power for distributing to each user is adjusted.
N=4, P=3, CQI are set in NP criterion of the embodiment of the present inventionThr1=4, CQIThr2=12, if current time slots whether
Within the power adjustment period, 4 CQI of the first reporting of user are respectively { 4,3,2,2 }, i.e. in the 4 of the first reporting of user time CQI
Have 3 times and be less than low threshold, 4 CQI that second user reports are respectively { 6,7,7,8 }, i.e., in 4 CQI that second user reports
It is all larger than low threshold, then the down initial power of the first user is increased by the first preset value, by the down initial function of second user
Rate reduce the first preset value, if the first preset value be 0.5dBm, then the first user down initial power increase 0.5dBm, second
The down initial power of user reduces 0.5dBm.
The embodiment of the present invention determines the downlink of each user on every RE according to the path loss of downlink every RE power and each user
Initial power, then the CQI of each reporting of user is adjusted the down initial power of each user based on the received, so that
The distribution of the descending power of each user meets the demodulation requirement of receiver user, so that receiver user be made to modulate signals into out
Come, and improve the spectrum efficiency of system, increases the access capacity of system；While user terminal is according to the down channel of base station
State information reference signals power and down initial power sharing ratio determine the downlink channel condition information reference of each user
Signal power, then user terminal calculates each according to the downlink channel condition information reference signal power and path loss of each user
The downlink signal-to-noise ratio of user, multiple SINR of each user are mapped as corresponding CQI by end user end, and CQI is sent to
Base station is adjusted base station according to down initial power of the CQI to each user, so that point of the descending power of each user
With the demodulation requirement for meeting receiver user, so that receiver user be allow to modulate signals into out, and system is improved
Spectrum efficiency, increase the access capacity of system.
Fig. 3 is power adjustment system structural schematic diagram in a kind of MIMO-NOMA system provided in an embodiment of the present invention, is such as schemed
Shown in 3, which includes: the first determining module 11 and adjustment module 12；
First determining module 11 determines each user on every RE according to the path loss of downlink every RE power and each user
Down initial power；
Specifically, at the beginning of the down initial power for the first user that the first determining module 11 determines is greater than the downlink of remaining user
The sum of beginning power and the demodulation threshold of receiver user；The path loss of first user is less than remaining user；
The down initial power of remaining each user and the difference of corresponding path loss are greater than coverage threshold；
The sum of down initial power of different user is equal to every RE power on every RE.
Adjust module 12, for each reporting of user based on the received CQI to the down initial power of each user into
Row adjustment.
Fig. 4 is power adjustment system structural schematic diagram in another kind MIMO-NOMA system provided in an embodiment of the present invention, into
One step, the system further include: the second determining module 21, computing module 22 and mapping block 23；
Second determining module 21, for the downlink channel condition information reference signal power and down initial function according to base station
Rate allocation proportion determines the downlink channel condition information reference signal power of each user；
Computing module 22 is calculated for the downlink channel condition information reference signal power and path loss according to each user
The downlink signal-to-noise ratio of each user；
CQI for multiple SINR of each user to be mapped as corresponding CQI, and is sent to base station by mapping block 23,
It is adjusted base station according to down initial power of the CQI to each user.
Specifically, adjustment module 12 includes determination unit and adjustment unit；
Determination unit, for determining whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so,
Trigger adjustment unit；
Adjustment unit is adjusted for the down initial power to each user.
How the embodiment of the present invention is illustrated to the downlink function of two users of every RE by taking every RE is multiplexed two users as an example
Rate is allocated, but is not limited to every RE and is multiplexed two users.
Further, it is determined that unit includes that the first determining subelement and second determine subelement；Adjustment unit includes first
Adjust subelement and second adjustment subelement；
First determines subelement, for determining whether there are P in N number of CQI value that the first user and second user report
CQI value is less than low threshold, if so, triggering second determines subelement；
Second determine subelement, for determine first user's received signal intensity whether be greater than second user signal it is strong
Degree, if so, triggering the first adjustment subelement；Otherwise, second adjustment subelement is triggered；
The first adjustment subelement will be under second user for by the first preset value of down initial power of the first user
Row initial power reduces by the first preset value；
Second adjustment subelement, for the down initial power of the first user to be reduced by the first preset value, by second user
Down initial power increase the first preset value；
After the first adjustment subelement or the adjustment of second adjustment subelement under the descending power and second user of the first user
The sum of row power is equal to every RE power.
Alternatively, determination unit, which is used to determine in N number of CQI value of the first reporting of user, whether P CQI value is greater than low door
Limit, and have whether P CQI value is less than low threshold in N number of CQI value for reporting of second user, if so, triggering adjustment unit；
Correspondingly, adjustment unit is used to the down initial power of the first user reducing by the first preset value, by second user
Down initial power increase the first preset value；
The sum of descending power and the descending power of second user of adjustment unit the first user adjusted are equal to every RE function
Rate.
Alternatively, determination unit, which is used to determine in N number of CQI value of the first reporting of user, whether P CQI value is less than low door
Limit, and have whether P CQI value is greater than low threshold in N number of CQI value for reporting of second user, if so, triggering adjustment unit；
Correspondingly, adjustment unit is used to the down initial power of the first user increasing by the first preset value, by second user
Down initial power reduce the first preset value；
The sum of descending power and the descending power of second user of adjustment unit the first user adjusted are equal to every RE function
Rate.
Further, whether the embodiment of the invention also includes determination modules, for judging current time slots in power adjustment week
In phase, if so, triggering adjustment module.
The embodiment of the present invention determines the downlink of each user on every RE according to the path loss of downlink every RE power and each user
Initial power, then the CQI of each reporting of user is adjusted the down initial power of each user based on the received, so that
The distribution of the descending power of each user meets the demodulation requirement of receiver user, so that receiver user be made to modulate signals into out
Come, and improve the spectrum efficiency of system, increases the access capacity of system；Further, user in the embodiment of the present invention
End determines each user's according to the downlink channel condition information reference signal power and down initial power sharing ratio of base station
Downlink channel condition information reference signal power, then user terminal is according to the downlink channel condition information reference signal of each user
Power and path loss, calculate the downlink signal-to-noise ratio of each user, and multiple SINR of each user are mapped as corresponding to by end user end
CQI, and CQI is sent to base station, is adjusted base station according to down initial power of the CQI to each user, so that often
The distribution of the descending power of a user meets the demodulation requirement of receiver user, so that receiver user be allow to modulate signals into
Out, and the spectrum efficiency of system is improved, increases the access capacity of system.
Fig. 5 is a kind of electronic equipment structural schematic diagram provided in an embodiment of the present invention, in the following, being described with reference to figure according to this
Apply for the electronic equipment of embodiment.
As shown in figure 5, electronic equipment 100 includes one or more processors 101 and memory 102.
Processor 101 can be central processing unit (CPU) or have data-handling capacity and/or instruction execution capability
Other forms processing unit, and can control the other assemblies in electronic equipment 100 to execute desired function.
Memory 102 may include one or more computer program products, and the computer program product may include
Various forms of computer readable storage mediums, such as volatile memory and/or nonvolatile memory.The volatibility is deposited
Reservoir for example may include random access memory (RAM) and/or cache memory (cache) etc..It is described non-volatile
Memory for example may include read-only memory (ROM), hard disk, flash memory etc..It can be on the computer readable storage medium
One or more computer program instructions are stored, processor 101 can run described program instruction, to realize sheet described above
Power regulating method and/or other desired functions in the MIMO-NOMA system of each embodiment of application.
In one example, electronic equipment 100 can also include: input unit 103 and output device 104, these components
It is interconnected by bindiny mechanism's (not shown) of bus system and/or other forms.
For example, the input unit 103 may include photographic device, for acquiring input picture.In addition, the input equipment
103 can also include such as keyboard, mouse etc..
The output device 104 can be output to the outside various information, including the foreground mask characteristic pattern determined.The output
Equipment 104 may include such as display, loudspeaker, printer and communication network and its remote output devices connected
Etc..
Certainly, to put it more simply, illustrating only in the electronic equipment 100 one in component related with the application in Figure 100
A bit, the component of such as bus, input/output interface etc. is omitted.In addition to this, according to concrete application situation, electronic equipment
100 can also include any other component appropriate.
Illustrative computer program product and computer readable storage medium
Other than the above method and equipment, embodiments herein can also be computer program product comprising meter
Calculation machine program instruction, it is above-mentioned that the computer program instructions make the processor execute this specification when being run by processor
According in the MIMO-NOMA system of the various embodiments of the application in power regulating method described in " illustrative methods " part
Step.
The computer program product can be write with any combination of one or more programming languages for holding
The program code of row the embodiment of the present application operation, described program design language includes object oriented program language, such as
Java, C++ etc. further include conventional procedural programming language, such as " C " language or similar programming language.Journey
Sequence code can be executed fully on the user computing device, partly execute on a user device, be independent soft as one
Part packet executes, part executes on a remote computing or completely in remote computing device on the user computing device for part
Or it is executed on server.
In addition, embodiments herein can also be computer readable storage medium, it is stored thereon with computer program and refers to
It enables, the computer program instructions make the processor execute above-mentioned " the exemplary side of this specification when being run by processor
According to the step in the MIMO-NOMA system of the various embodiments of the application in power regulating method described in method " part.
The computer readable storage medium can be using any combination of one or more readable mediums.Readable medium can
To be readable signal medium or readable storage medium storing program for executing.Readable storage medium storing program for executing for example can include but is not limited to electricity, magnetic, light, electricity
Magnetic, the system of infrared ray or semiconductor, device or device, or any above combination.Readable storage medium storing program for executing it is more specific
Example (non exhaustive list) includes: the electrical connection with one or more conducting wires, portable disc, hard disk, random access memory
Device (RAM), read-only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disc
Read-only memory (CD-ROM), light storage device, magnetic memory device or above-mentioned any appropriate combination.
The basic principle of the application is described in conjunction with specific embodiments above, however, it is desirable to, it is noted that in this application
The advantages of referring to, advantage, effect etc. are only exemplary rather than limitation, must not believe that these advantages, advantage, effect etc. are the application
Each embodiment is prerequisite.In addition, detail disclosed above is merely to exemplary effect and the work being easy to understand
With, rather than limit, it is that must be realized using above-mentioned concrete details that above-mentioned details, which is not intended to limit the application,.
Device involved in the application, device, equipment, system block diagram only as illustrative example and be not intended to
It is required that or hint must be attached in such a way that box illustrates, arrange, configure.As those skilled in the art will appreciate that
, it can be connected by any way, arrange, configure these devices, device, equipment, system.Such as "include", "comprise", " tool
" etc. word be open vocabulary, refer to " including but not limited to ", and can be used interchangeably with it.Vocabulary used herein above
"or" and "and" refer to vocabulary "and/or", and can be used interchangeably with it, unless it is not such that context, which is explicitly indicated,.Here made
Vocabulary " such as " refers to phrase " such as, but not limited to ", and can be used interchangeably with it.
It may also be noted that each component or each step are can to decompose in the device of the application, device and method
And/or reconfigure.These decompose and/or reconfigure the equivalent scheme that should be regarded as the application.
The above description of disclosed aspect is provided so that any person skilled in the art can make or use this
Application.Various modifications in terms of these are readily apparent to those skilled in the art, and are defined herein
General Principle can be applied to other aspect without departing from scope of the present application.Therefore, the application is not intended to be limited to
Aspect shown in this, but according to principle disclosed herein and the consistent widest range of novel feature.
In order to which purpose of illustration and description has been presented for above description.In addition, this description is not intended to the reality of the application
It applies example and is restricted to form disclosed herein.Although already discussed above multiple exemplary aspects and embodiment, this field skill
Its certain modifications, modification, change, addition and sub-portfolio will be recognized in art personnel.
Claims (11)
1. power regulating method in a kind of MIMO-NOMA system, comprising:
According to the path loss of downlink every RE power and each user, the down initial power of each user on every RE is determined；
The CQI of each reporting of user is adjusted the down initial power of each user based on the received.
2. according to the method described in claim 1, wherein, according to the path loss of downlink every RE power and each user, what is determined is every
The down initial power of the upper each user of RE, needs to meet:
The down initial power of first user be greater than remaining user down initial power and receiver user demodulation threshold it
With；The path loss of first user is less than remaining user；
The down initial power of remaining each user and the difference of corresponding path loss are greater than coverage threshold；
The sum of down initial power of different user is equal to every RE power on every RE.
3. according to the method described in claim 1, wherein, the CQI of each reporting of user is under each user based on the received
Row initial power is adjusted, comprising:
Determine whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, at the beginning of the downlink of each user
Beginning power is adjusted.
4. according to the method described in claim 3, wherein, the first user and second user are multiplexed on every RE；
Determine whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, at the beginning of the downlink of each user
Beginning power is adjusted, comprising:
Whether determine has P CQI value to be less than low threshold in N number of CQI value that the first user and second user report, if so,
When determining that first user's received signal intensity is greater than the signal strength of second user, the down initial power of the first user is increased
Add the first preset value, the down initial power of second user is reduced by the first preset value；Determine that first user's received signal is strong
When degree is less than the signal strength of second user, the down initial power of the first user is reduced by the first preset value, by second user
Down initial power increase the first preset value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
5. according to the method described in claim 3, wherein, the first user and second user are multiplexed on every RE；
Determine whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, at the beginning of the downlink of each user
Beginning power is adjusted, comprising:
Determining has P CQI value whether to be greater than low threshold in N number of CQI value of the first reporting of user, and second user report it is N number of
Have whether P CQI value is less than low threshold in CQI value, is preset if so, the down initial power of the first user is reduced first
The down initial power of second user is increased by the first preset value by value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
6. according to the method described in claim 3, wherein, the first user and second user are multiplexed on every RE；
Determine whether the CQI of each reporting of user meets specified requirements according to NP criterion, if so, at the beginning of the downlink of each user
Beginning power is adjusted, comprising:
Determining has P CQI value whether to be less than low threshold in N number of CQI value of the first reporting of user, and second user report it is N number of
Have whether P CQI value is greater than low threshold in CQI value, is preset if so, the down initial power of the first user is increased by first
The down initial power of second user is reduced by the first preset value by value；
The sum of descending power and the descending power of second user of first user adjusted are equal to every RE power.
7. method according to any one of claims 1 to 6, the CQI of each reporting of user is every to distributing to based on the received
Before the descending power of a user is adjusted, further includes:
Current time slots are judged whether within the power adjustment period, if it is, executing the CQI of each reporting of user based on the received
The step of descending power for distributing to each user is adjusted.
8. method according to any one of claims 1 to 6, comprising:
User terminal determines every according to the downlink channel condition information reference signal power and down initial power sharing ratio of base station
The downlink channel condition information reference signal power of a user；
User terminal calculates the downlink of each user according to the downlink channel condition information reference signal power and path loss of each user
Signal-to-noise ratio；
Multiple SINR of each user are mapped as corresponding CQI by user terminal, and CQI is sent to base station.
9. power adjustment system in a kind of MIMO-NOMA system, comprising:
First determining module determines on every RE at the beginning of the downlink of each user according to the path loss of downlink every RE power and each user
Beginning power；
Second determining module, for the downlink channel condition information reference signal power and down initial power distribution according to base station
The downlink channel condition information reference signal power of each user of ratio-dependent；
Computing module calculates each use for the downlink channel condition information reference signal power and path loss according to each user
The downlink signal-to-noise ratio at family；
CQI for multiple SINR of each user to be mapped as corresponding CQI, and is sent to adjustment module by mapping block；
Module is adjusted, the CQI for each reporting of user based on the received is adjusted the down initial power of each user.
10. a kind of electronic equipment, comprising:
Processor；
For storing the memory of the processor-executable instruction；
The executable instruction makes to appoint in the processor execution the claims 1~7 when being run by the processor
Power regulating method in MIMO-NOMA system described in one.
11. a kind of computer readable storage medium is stored thereon with computer program instructions, the computer program instructions are in quilt
Processor executes the processor such as power in MIMO-NOMA system according to any one of claims 1 to 7
Method of adjustment.
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