CN103796216B - Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network - Google Patents
Interference suppression method based on fractional frequency reuse and joint transmission in heterogeneous network Download PDFInfo
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Abstract
The invention discloses an interference suppression method based on fractional frequency reuse and joint transmission in a heterogeneous network. The interference suppression method mainly solves the problems that interference exists in a heterogeneous network and edge user throughput capacity is low in the heterogeneous network. The interference suppression method includes the steps that (1) cell models are established, namely, each cell is composed of three sectors, a macro base station is arranged at the center of each cell, and two micro base stations are arranged in each sector; (2) fractional frequency reuse is used for assigning frequency resources to each base station; (3) when a new user having access to the network is a micro base station user or a central macro base station user or a macro base station non-CoMP user, a service base station of the new user provides service for the new user independently; (4) when a user having access to the network is a macro base station cooperative user, a service base station of the new user and a cooperative base station of the new user perform joint transmission on the new user. The interference suppression method effectively suppresses interference in each cell and between the adjacent cells, improves the frequency utilization rate and the throughput capacity of cell edge users, and can be used for transmission in the heterogeneous network.
Description
Technical field
The invention belongs to communication technical field, is related to be a kind of disturbance restraining method, can be used for heterogeneous network transmission.
Background technology
With the continuous development of mobile communication technology, the inhomogeneities of service distribution are more and more substantially, most
Message volume concentrates on the hot zones of indoor and outdoors, and traditional homogeneous network can not meet the demand of people, because
This, heterogeneous network technologies are widely applied.But because heterogeneous network introduces low power nodes, make dry in heterogeneous network
Disturb except the interference between neighbor cell base station, the interference between also same minizone macro base station and micro-base station, do in network
Disturbing becomes more complicated.So, suppress the interference in heterogeneous network cell significant.
For the interference problem in heterogeneous network, there are many solutions, such as fractional frequency reuse plan, power in recent years
Control program, coordinated multipoint transmission technology CoMP, the scheme based on carrier aggregation etc..Wherein, a kind of partial frequency multiplexing side
Case is that whole frequency range is divided into into 3 mutually orthogonal parts, and the macro base station marginal area of each sector uses respectively one therein
Frequency-division section, remaining frequency range is then used in the macro base station central area of this sector, and micro-base station uses grand with this sector in this sector
Base station center region identical frequency resource, then Power Control is carried out when requiring macro base station to center user service, and ensure phase
Adjacent macro base station marginal area uses mutually orthogonal frequency, so as to effectively suppress in same cell grand, micro-base station and adjacent
Interference of the cell macro base station to this cell macro base station edge customer, but can there is neighbor cell macro base station to this cell in this scheme
The interference of micro-base station user, and the problem that macro base station edge user throughput is relatively low.
Coordinated multipoint transmission technology CoMP is also a kind of method for suppressing to be disturbed in heterogeneous network, and a kind of technology therein is connection
Transmission is closed, i.e., provides service for a user simultaneously using identical frequency using multiple base stations, thus turn interference signal
Useful signal is turned to, although this technology can restrained effectively the co-channel interference suffered by user, user throughput is improved,
Frequency efficiency is very low.
The content of the invention
Present invention aims in above-mentioned heterogeneous network fractional frequency reuse plan deficiency, propose a kind of heterogeneous network
Method of the middle partial frequency multiplexing in combination with joint transmission, effectively to suppress dry in same cell and between neighbor cell
Disturb, improve frequency efficiency and macro base station edge user throughput.
The technical scheme is that what is be achieved in that：
The frequency specified to the distribution of the central area of macro base station, marginal area and micro-base station by fractional frequency reuse plan
Section, and Power Control is combined, so as to effectively suppress the interference in same cell and between neighbor cell base station, and ensure fan
There is higher frequency repeat utilization ratio in area；By carrying out joint transmission to macro base station edge customer, macrocell edge customer is improved
Handling capacity, so that the performance of whole system is greatly improved.Implementation step includes as follows：
（1）In being located at cellular mobile communication networks, each cell is made up of three regular hexagon sectors, at three just
A macro base station is placed at the center of hexagonal sector, and two micro-base stations are placed in each sector；
（2）Whole frequency range in cell is divided into into mutually orthogonal 4 section, and is supplied to micro-base station to use by the 1st section, afterwards 3
The macro base station marginal area that section is respectively allocated in three sectors is used, and the macro base station central area of each sector uses this sector
Other three band frequencies outside macro base station marginal area；
（3）Determine the affiliated serving BS of new user and user type of access network：
（3a）Reference Signal Received Power threshold value r of all macro base stations to cell and micro-base station setting central area and
Signal to Interference plus Noise Ratio threshold value Γ of user；
(3b) Reference Signal Received Power value RSRP of each base station to new user, and the ginseng in micro-base station to new user are calculated
Examine in signal reception power value plus a deviant, constitute Reference Signal Received Power value of the micro-base station to new user, then from institute
A maximum is found out in some Reference Signal Received Power values, if the corresponding base station of the maximum is macro base station, the use
Family be macro base station user, execution step（3b1）, otherwise, the user be micro-base station user, execution step（3b2）；
（3b1）By the Reference Signal Received Power value of macro base station user and Reference Signal Received Power threshold value r for setting
Relatively, if Reference Signal Received Power value is more than or equal to r, the user is judged as macro base station central user, execution step
（4）, otherwise, the user is judged as macro base station edge customer, execution step（3c）；
（3b2）By the Reference Signal Received Power value of micro-base station user and Reference Signal Received Power threshold value r for setting
Relatively, if received power value is more than or equal to r, the user is judged as micro-base station central user, execution step（6）, otherwise,
The user is judged as micro-base station edge customer, execution step（3d）；
（3c）Calculate macro base station edge customer Signal to Interference plus Noise Ratio SINR1, and by the Signal to Interference plus Noise Ratio with setting Signal to Interference plus Noise Ratio
Threshold value Γ compares, if the Signal to Interference plus Noise Ratio of macro base station edge customer is more than or equal to Signal to Interference plus Noise Ratio threshold value Γ of setting, should
User is judged as macro base station non-cooperating user, execution step（5）, otherwise, the user is judged as macro base station collaboration user, holds
Row step（7）；
(3d) calculate micro-base station edge customer Signal to Interference plus Noise Ratio SINR2, and by the Signal to Interference plus Noise Ratio with setting Signal to Interference plus Noise Ratio
Threshold value Γ compares, if the Signal to Interference plus Noise Ratio of micro-base station edge customer is more than or equal to Signal to Interference plus Noise Ratio threshold value Γ of setting, should
User is judged as micro-base station non-cooperating user, execution step（6）, otherwise, the user is judged as receiving its reference signal
The edge customer of prominent macro base station, return to step（3c）；
（4）Macro base station is serviced the macro base station central user using its central area frequency, and macro base station is entered
Row Power Control, strongly reduces the interference to this sector micro-base station user；
（5）Macro base station is serviced the macro base station non-cooperating user using its marginal area frequency, when macro base station
When marginal area frequency is not enough, by the frequency use condition for detecting this sector base stations, micro-base station and macro base station center are borrowed
The simultaneously idle frequency in region；
(6) micro-base station provides clothes using its frequency is distributed to the micro-base station central user or micro-base station non-cooperating user
Business；
（7）Joint transmission is carried out to macro base station collaboration user：
（7a）Cooperative cluster is divided, i.e., constitutes a cooperative cluster with the adjacent macro base station per three, it is right between macro base station closing on
Macro base station collaboration user cooperates；
（7b）In all macro base stations, the Reference Signal Received Power value the second, the to the macro base station collaboration user is found out
Three two big macro base stations, the cooperative cluster that the two macro base stations are located simultaneously is the cooperation belonging to the macro base station collaboration user
Cluster, the two macro base stations are two cooperative base stations of the macro base station collaboration user；
（7c）In the reserved frequency of the macro base station marginal area being located from macro base station collaboration user, the frequency of free time is found out,
The serving BS of the macro base station collaboration user and two cooperative base stations use this idle frequence, are that the macro base station collaboration user is same
Shi Jinhang is serviced.
The invention has the advantages that：
1）Whole frequency in cell is divided into 4 sections by the present invention by fractional frequency reuse plan, to the center of macro base station
The frequency range that the distribution of region, marginal area and micro-base station is specified, and Power Control is combined, so as to effectively inhibit same cell
Between interior each base station, and interference of the neighbor cell base station to each base station of this cell, and ensure that there is higher frequency in sector
Reusability；
2）The present invention improves handling up for macrocell edge customer by carrying out joint transmission to macro base station edge customer
Amount, so that the performance of whole system is greatly improved.
Description of the drawings
Fig. 1 is the overall flow figure of the present invention.
Fig. 2 is the cell pattern figure built in the present invention.
Fig. 3 is the frequency partition figure in the present invention.
Fig. 4 is for the frequency diagram of each base station distribution in a cell in the present invention.
Fig. 5 be in the present invention each base station distribution in multiple cells frequency diagram.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail.
With reference to Fig. 1, the present invention's is implemented as follows：
Step 1：Set up cell pattern：
With reference to Fig. 2, the structure of this step is as follows：
In being located at cellular mobile communication networks, there is N number of cell, this example takes N=7.Wherein, first cell be in a network
The heart, remaining six cell are distributed in around first cell, as its neighbor cell, as shown in Figure 2 a；
If each cell is made up of three regular hexagon sectors, as shown in Figure 2 b；
By taking first cell as an example, high power node, i.e. macro base station M1 are placed at the center of three regular hexagon sectors, it is grand
Base station M1 is made up of 3 120 ° of antennas, and every antenna covers a sector, and two low-power are placed in first sector 1
Node, i.e. micro-base station P1, P2 places two low power nodes, i.e. micro-base station P3, P4, in the 3rd fan in second sector 2
Two low power nodes, i.e. micro-base station P5 are placed in area 3, P6, micro-base station is made up of 360 ° of antennas, around macro base station M1
Circle represent the central area of macro base station, the circle around micro-base station in each sector represents the coverage of micro-base station, such as
Shown in Fig. 2 c.
Step 2：Each base station dividing frequency resource is given using partial frequency multiplexing.
（2a）Whole frequency range in cell is divided into into mutually orthogonal 4 section, wherein the first frequency range accounts for the 1/3 of whole frequency range,
The second, the three, the 4th frequency range accounts for respectively the 2/9 of whole frequency range；By 1/4 in each 2/9 band frequency, i.e., the 1/18 of whole frequency range
Frequency range, keeps for macro base station collaboration user, other users to use, as shown in Figure 3；
（2b）Be each base station dividing frequency in cell by taking first cell as an example, will first frequency allocation give
Each micro-base station in first sector 1, by second frequency allocation to the macro base station marginal area in first sector 1, will
First frequency range and the 3rd frequency range and four frequency ranges, distribute to the macro base station central area in first sector 1；By first
Frequency allocation is to each micro-base station in second sector 2, the macro base station side that the 3rd frequency allocation is given in second sector 2
Edge region, the macro base station center that first frequency range and second frequency range and the 4th frequency allocation are given in second sector 2
Domain；By first frequency allocation to each micro-base station in first sector 3, by the 4th frequency allocation the 3rd sector 3 is given
In macro base station marginal area, by first frequency range and second frequency range and the 3rd frequency allocation in the 3rd sector 3
Macro base station central area, as shown in Figure 4；
（2c）Repeat step（2b）, to each cell in each base station dividing frequency, as a result as shown in Figure 5；
Macro base station marginal area uses mutually orthogonal frequency range with micro-base station in same sector, same so as to effectively inhibit
Interference in one sector between macro base station marginal area and micro-base station；Adjacent macro base station marginal area and macro base station side in this sector
Edge region and micro-base station use mutually orthogonal frequency range, so as to effectively inhibit adjacent macro base station marginal area grand with this sector
Interference between base station marginal area and micro-base station.
The fractional frequency reuse plan of the present invention can make the frequency efficiency in each sector reach 14/9, fully meet
The requirement of user capacity increase in heterogeneous network.
Step 3：Determine the affiliated serving BS of new user and user type of access network.
（3a）Reference Signal Received Power threshold value r of all macro base stations to cell and micro-base station setting central area and
Signal to Interference plus Noise Ratio threshold value Γ of user；
(3b) Reference Signal Received Power value RSRP of each base station to new user is calculated：
（3b1）Calculate the path loss of macro base station：L1=128.6+37.6log10R1,
Wherein R1 is distance of the macro base station to user, in units of km；
（3b2）According to transmission power W1 and antenna gain A1 and its path loss L1 of macro base station, macro base station is calculated to new
The Reference Signal Received Power of user：RSRP1=W1+A1-L1；
（3b3）Calculate the path loss of micro-base station：L2=140.7+36.7log10R2,
Wherein R2 is distance of the micro-base station to user, in units of km；
（3b4）According to transmission power W2 and its path loss L2 of micro-base station, calculate reference of the micro-base station to new user and believe
Number receiving power：RSRP2=W2-L2；
According to above-mentioned result of calculation, one is found out most from Reference Signal Received Power value of all macro base stations to new user
Big value, is designated as RSRP1max, a maximum is found out from Reference Signal Received Power value of all micro-base stations to new user, remember
For RSRP2max, and to RSRP2maxPlus deviant a, then by RSRP1maxWith RSRP2max+ a the two data are compared,
Judge serving BS type：If RSRP1max≥RSRP2max+ a, then the user be macro base station user, execution step（3b5）, it is no
Then, the user be micro-base station user, execution step（3b6）；
（3b5）The received power value RSRP1 of macro base station user is compared with receiving power threshold value r of setting, is sentenced
The user type of disconnected macro base station：If RSRP1max>=r, then the user is macro base station central user, and execution step 4 otherwise, is somebody's turn to do
User be macro base station edge customer, execution step（3c）；
（3b6）The received power value RSRP2+a of micro-base station user is compared with receiving power threshold value r of setting,
Judge the user type of micro-base station：If RSRP2max+ a >=r, then the user is micro-base station central user, and execution step 6 is no
Then, the user be micro-base station edge customer, execution step（3d）；
（3c）Its collaboration user is judged according to the Signal to Interference plus Noise Ratio of macro base station edge customer：
（3c1）Calculate the Signal to Interference plus Noise Ratio of macro base station edge customer：SINR1=S1/ (N+P1), wherein, S1 is macro base station edge
The available power that user receives, N is channel noise power, and P1 is the jamming power that macro base station edge customer is received；
（3c2）The Signal to Interference plus Noise Ratio SINR1 of macro base station edge customer is compared with Signal to Interference plus Noise Ratio threshold value Γ of setting,
If SINR1 >=Γ, the user be macro base station non-cooperating user, execution step 5, otherwise, the user be macro base station cooperation use
Family, execution step 7；
(3d) its collaboration user is judged according to the Signal to Interference plus Noise Ratio of micro-base station edge customer：
（3d1）Calculate the Signal to Interference plus Noise Ratio of micro-base station edge customer：SINR2=S2/ (N+P2), wherein, S2 is micro-base station edge
The available power that user receives, N is channel noise power, and P2 is the jamming power that micro-base station edge customer is received；
（3d2）The Signal to Interference plus Noise Ratio SINR2 of micro-base station edge customer is compared with Signal to Interference plus Noise Ratio threshold value Γ of setting, if
SINR2 >=Γ, then the user be micro-base station non-cooperating user, execution step 6, otherwise, the user be RSRP1 corresponding to grand base
The edge customer stood, return to step（3c）.
Above-mentioned（3d2）In step, micro-base station users of the Signal to Interference plus Noise Ratio SINR2 less than Γ is judged as that macro base station edge is used
Family, in order to ensure that micro-base station user is owned by higher Signal to Interference plus Noise Ratio, thus without considering micro-base station edge customer
The relatively low problem of handling capacity, and only consider the relatively low problem of macro base station edge user throughput.
Step 4：Macro base station is serviced the macro base station central user using its central area frequency, and to macro base station
Power Control is carried out, strongly to reduce the dry of the macro base station edge customer to this sector micro-base station user and neighbor cell
Disturb.
Because in a cell, macro base station central area and micro-base station all use second frequency range in first sector,
So when macro base station is serviced macro base station central user using second frequency range, can produce to micro-base station user in this sector dry
Disturb；When the macro base station in first sector is serviced macro base station central user using the 3rd frequency range and the 4th frequency range, meeting
Interference is produced to the macro base station edge customer of neighbor cell, the disturbed condition in other two sectors is similar to first sector,
So Power Control is carried out to macro base station, strongly to suppress these to disturb.
Described Power Control is：Macro base station is taken with a part of power of whole transmission power to macro base station central user
Business.
Step 5：Macro base station is serviced the macro base station non-cooperating user using its marginal area frequency, works as macro base station
Marginal area frequency it is not enough when, enter line frequency borrow, i.e., macro base station detects two micro-base stations and the macro base station in this sector
Central area whether there is the frequency of common free, if they have the frequency of common free, macro base station just borrows this frequency to this
Macro base station non-cooperating user is serviced, and otherwise, macro base station can not provide service to the macro base station non-cooperating user.Borrowed by frequency
With the frequency efficiency in sector can be made to obtain certain raising.
Step 6：Micro-base station provides service using its frequency is distributed to its central user or non-cooperating user.
Step 7：Joint transmission is carried out to macro base station collaboration user.
（7a）Divide cooperative cluster, will the serving BS of macro base station collaboration user and six macro base stations around it be divided into
Six cooperative clusters:
Below so that the serving BS of macro base station collaboration user is macro base station M1 as an example, the concrete division of its cooperative cluster is described：
By first macro base station M1, second macro base station M2, the 3rd macro base station M3, first cooperative cluster is constituted；
By first macro base station M1, the 3rd macro base station M3, the 4th macro base station M4, second cooperative cluster is constituted；
By first macro base station M1, the 4th macro base station M4, the 5th macro base station M5, the 3rd cooperative cluster is constituted；
By first macro base station M1, the 5th macro base station M5, the 6th macro base station M6, the 4th cooperative cluster is constituted；
By first macro base station M1, the 6th macro base station M6, the 7th macro base station M7, the 5th cooperative cluster is constituted；
By first macro base station M1, the 7th macro base station M7, second macro base station M2, the 6th cooperative cluster is constituted；
（7b）The Reference Signal Received Power value that its collaboration user is found out from all macro base stations is second largest and the third-largest
Two macro base stations, it is by two cooperative base stations that the two macro base stations are the macro base station collaboration user, the two macro base stations are same
When the cooperative cluster that is located as the macro base station collaboration user cooperative cluster；
（7c）In the reserved frequency of the macro base station marginal area being located from the macro base station collaboration user, the frequency of free time is found out
Rate, the serving BS of the macro base station collaboration user and two cooperative base stations use this idle frequence, are that the macro base station cooperation is used
Family is serviced simultaneously.
Above description is only example of the present invention, does not constitute any limitation of the invention.Obviously for this
For the professional in field, after present invention and principle has been understood, all may be without departing substantially from inventive principle, the feelings of structure
Under condition, various amendments and the change in form and details is carried out, but these amendments and change based on inventive concept still exist
Within the claims of the present invention.
Claims (4)
1. comprised the steps based on partial frequency multiplexing and the disturbance restraining method of joint transmission in a kind of heterogeneous network：
(1) it is located in cellular mobile communication networks, each cell is made up of three regular hexagon sectors, on three positive six sides
A macro base station is placed at the center of shape sector, and two micro-base stations are placed in each sector；
(2) the whole frequency range in cell is divided into into mutually orthogonal 4 section：First paragraph accounts for the 1/3 of whole frequency range, and afterwards three sections respectively account for whole
The 2/9 of individual frequency range, 1/4 in each 2/9 band frequency, i.e., 1/18 frequency range of whole frequency range is to keep for macro base station collaboration user
Use, other users can not be used, and be supplied to micro-base station to use first paragraph, afterwards three sections are respectively allocated in three sectors
Macro base station marginal area use, the macro base station central area of each sector uses other outside this sector macro base station marginal area
Three band frequencies；
(3) the affiliated serving BS of new user and user type of access network are determined：
(3a) all macro base stations and micro-base station to cell set Reference Signal Received Power threshold value r and the user of central area
Signal to Interference plus Noise Ratio threshold value Γ；
(3b) Reference Signal Received Power value RSRP of each base station to new user is calculated, and the reference in micro-base station to new user is believed
On number received power value plus a deviant, Reference Signal Received Power value of the micro-base station to new user is constituted, then from all of
A maximum is found out in Reference Signal Received Power value, if the corresponding base station of the maximum is macro base station, the user is
Macro base station user, execution step (3b1), otherwise, the user be micro-base station user, execution step (3b2)；
(3b1) the Reference Signal Received Power value of macro base station user is compared with Reference Signal Received Power threshold value r of setting,
If Reference Signal Received Power value is more than or equal to r, the user is judged as macro base station central user, and execution step (4) is no
Then, the user is judged as macro base station edge customer, execution step (3c)；
(3b2) the Reference Signal Received Power value of micro-base station user is compared with Reference Signal Received Power threshold value r of setting,
If received power value is more than or equal to r, the user is judged as micro-base station central user, execution step (6), otherwise, the use
Family is judged as micro-base station edge customer, execution step (3d)；
(3c) calculate macro base station edge customer Signal to Interference plus Noise Ratio SINR1, and by the Signal to Interference plus Noise Ratio with setting Signal to Interference plus Noise Ratio thresholding
Value Γ compares, if the Signal to Interference plus Noise Ratio of macro base station edge customer is more than or equal to Signal to Interference plus Noise Ratio threshold value Γ of setting, the user
It is judged as macro base station non-cooperating user, execution step (5), otherwise, the user is judged as macro base station collaboration user, performs step
Suddenly (7)；
(3d) calculate micro-base station edge customer Signal to Interference plus Noise Ratio SINR2, and by the Signal to Interference plus Noise Ratio with setting Signal to Interference plus Noise Ratio thresholding
Value Γ compares, if the Signal to Interference plus Noise Ratio of micro-base station edge customer is more than or equal to Signal to Interference plus Noise Ratio threshold value Γ of setting, the user
It is judged as micro-base station non-cooperating user, execution step (6), otherwise, the user is judged as to its Reference Signal Received Power
The edge customer of maximum macro base station, return to step (3c)；
(4) macro base station is serviced the macro base station central user using its central area frequency, and carries out work(to macro base station
Rate is controlled, and strongly reduces the interference to this sector micro-base station user；
(5) macro base station is serviced the macro base station non-cooperating user using its marginal area frequency, when the edge of macro base station
When field frequency is not enough, by the frequency use condition for detecting this sector base stations, micro-base station and macro base station central area are borrowed
While idle frequency；
(6) micro-base station provides service using its frequency is distributed to the micro-base station central user or micro-base station non-cooperating user；
(7) joint transmission is carried out to macro base station collaboration user：
(7a) cooperative cluster is divided, i.e., constitutes a cooperative cluster with the adjacent macro base station per three, closed between macro base station to grand base
Collaboration user of standing cooperates；
(7b) in all macro base stations, the Reference Signal Received Power value second to the macro base station collaboration user is found out, it is the third-largest
Two macro base stations, the cooperative cluster that the two macro base stations are located simultaneously is the cooperative cluster belonging to the macro base station collaboration user, this
Two macro base stations are two cooperative base stations of the macro base station collaboration user；
(7c) in the reserved frequency of the macro base station marginal area being located from macro base station collaboration user, the frequency of free time is found out, this is grand
The serving BS of base station collaboration user and two cooperative base stations use this idle frequence, are the macro base station collaboration user while entering
Row service.
2. method according to claim 1, wherein described in step (3b) reference signal of each base station to new user is calculated
Received power value RSRP, is carried out as follows：
(3a) path loss of macro base station is calculated：L1=128.6+37.6log10R1,
Wherein R1 is distance of the macro base station to user, in units of km；
(3b) according to transmission power W1 and antenna gain A1 and path loss L1 of macro base station, ginseng of the macro base station to new user is calculated
Examine signal reception power：RSRP1=W1+A1-L1；
(3c) path loss of micro-base station is calculated：L2=140.7+36.7log10R2,
Wherein R2 is distance of the micro-base station to user, in units of km；
(3d) according to transmission power W2 and path loss L2 of micro-base station, calculate micro-base station and work(is received to the reference signal of new user
Rate：RSRP2=W2-L2.
3. method according to claim 1, the Signal to Interference plus Noise Ratio of the calculating macro base station edge customer wherein described in step (3c)
SINR1, is calculated as follows：
SINR1=S1/ (N+P1),
Wherein, S1 is the available power that macro base station edge customer is received, and N is channel noise power, and P1 is macro base station edge use
The jamming power that family receives.
4. method according to claim 1, the Signal to Interference plus Noise Ratio of the calculating micro-base station edge customer wherein described in step (3d)
SINR2, is calculated as follows：
SINR2=S2/ (N+P2),
Wherein, S2 is the available power that micro-base station edge customer is received, and N is channel noise power, and P2 is micro-base station edge use
The jamming power that family receives.
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| CN104579441B (en) | 2014-12-29 | 2018-01-23 | 三维通信股份有限公司 | A kind of indoor DAS system and small base station down interference avoidance method |
| CN104602298B (en) * | 2015-01-30 | 2018-01-26 | 中国联合网络通信集团有限公司 | A kind of method of congestion control of eating dishes without rice or wine and base station |
| EP3278614A1 (en) * | 2015-04-01 | 2018-02-07 | Telefonaktiebolaget LM Ericsson (publ) | Service-specific scheduling in cellular networks |
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