CN103118424B - Long term evolution (LTE) uplink power control method and control system based on interference consciousness - Google Patents
Long term evolution (LTE) uplink power control method and control system based on interference consciousness Download PDFInfo
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Abstract
The invention discloses a long term evolution (LTE) uplink power control method and a control system based on interference consciousness. Through measurement of the difference between path loss PLki<k> from a user terminal I to a serving cell K of the user terminal I and path loss PLki<j> from the user terminal I to an adjacent cell base station J, and through information exchange of high-layer interference indicators, if signal interference occurs when interference indication information is exchanged among cell base stations is judged. The user terminals I in cells are divided into a type G1 and a type G2, different cell path loss compensating factors alpha are distributed according to user categories, interference identifiers and user path loss among the cells are combined to control and adjust emission power of the users, and interferences on uplinks in the cells around an LTE system are lowered. The method and the system are achieved on the basis of a power control method established by the third generation partnership project (3GPP) standard, an existing signaling protocol and a power control process of the LTE system do not need to be changed, and good compatibility is achieved.
Description
Technical field
The invention belongs to communication technical field, particularly relate to a kind of LTE uplink power control method based on interference consciousness.
Background technology
In wireless communication system, the main target of Poewr control method and system is exactly on the signal to noise ratio basis meeting Personal Communications Services required service quality requirement, reduce the interference to intra-cell users and neighbor cell as far as possible, improve travelling carriage energy ecology, extend the service time of travelling carriage battery.
Application number is that the Chinese patent of CN200910049850.X discloses a kind of TD-LTE system Poewr control method, its core technology is that the method utilizes the channel reciprocity of TD-LTE system uplink downlink, user is by estimating that the down channel of neighbor base station predicts the uplink interference of its up link to respective cell, on the basis of interference prediction, user can the transmitting power of active adjustment oneself to reduce interference to adjacent cell.This invention, without the need to changing existing power control procedures and signaling, has good compatibility, effectively can reduce inter-cell interference level, improves cell edge user throughput and throughput of system.This technical scheme is on cell uplink interference basis, and user regulates the interference of transmitting power reduction to adjacent cell.The size setting of interference threshold value affects the most key factor of the performance index of algorithm by being.Excessive threshold settings will cause neighbor cell to suffer strong area interference, too small threshold value will cause the signal to noise ratio needed for telex network to can not get ensureing, different threshold settings under different network environments also will cause the performance of scheme completely different, therefore threshold value is selected very difficult, and algorithm utilizes the channel response of down link and path loss to carry out value corresponding to alternative up link, in fact because the actual value of the inconsistent uplink downlink of environment also exists difference, and the computation complexity of algorithm can be strengthened to neighbor cell interference prediction.
Application number is that the Chinese patent of CN201110178285.4 discloses the power distribution method simplified in a kind of TD-LTE system, its core technology is to use ascending pilot frequency information to estimate up channel, and the uplink channel information of estimation is used for the calculating to descending power distribution coefficient; To each symbol of OFDM symbol, carry out descending by the modulus value of sub-carrier channels coefficient, the channel after arrangement is h '; Power P C is blocked in setting, and select front M maximum subcarrier of h ' modulus value to carry out linear power distribution, its remaining sub-carriers is regardless of joining power.This invention decreases the number of the subcarrier carrying out power division, and the iterative computation of traditional waterflood algorithm has been modified into linear operation, reduces design cost and complexity.This technical scheme, ascending pilot frequency information is utilized to estimate up channel, the uplink channel information of estimation is used for carry out optimum allocation to the power of down link, this algorithm is it is considered that LTE system downlink power distribution method, and algorithm is owing to distributing according to channel coefficients, power division between user will be caused to lack fairness, therefore and the power being not exclusively adapted to up link control.
Can draw from current existing LTE uplink power control scheme and 3GPP standard, the up link that 3GPP standard proposes controls just to consider that the transmission power of mobile station in community controls, uncommon power control scheme and the impact of power control on presence of intercell interference considering minizone, and existing LTE uplink power control scheme, there is threshold value and select many weak points such as difficulty and fairness distribution.
Summary of the invention
Problem to be solved by this invention is the HII(HighInterference Indicator utilized in LTE system up link between neighbor cell) associate feature such as path loss of user terminal to base station in message and community, uplink users in community is divided into strong jamming and weak jamming two large user classification, different cel l path loss balancing factor-alphas is distributed according to class of subscriber, the presence of intercell interference identifier obtained by X2 interface clearing house and user's path loss are jointly controlled and regulate the transmitting power of user, reduce the interference of up link between LTE system small area.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme, provides a kind of LTE uplink power control method based on interference consciousness, comprises the steps:
S100: according to the path loss of user terminal down link, the base station in service sector k of measuring and calculating user terminal uses to multiple neighbor cell base station j uplink pathloss
represent, measuring and calculating user terminal to its base station in service sector k path loss and use
represent;
S200: measuring and calculating user terminal is to the path loss of its base station in service sector k
with neighbor cell base station j path loss
between difference, choose wherein minimum value, and described minimum value be labeled as
namely
S300: base station in service sector k and neighbor cell base station j exchange interference indication message, high-rise interference designator H(j is comprised in described interference indication message, i), whether its value causes interference to determine to neighbor cell base station j by user terminal i, if then represent that it is easily disturb its value to be labeled as H(j to adjacent cell base station j, i)=1, otherwise H (j, i)=0;
S400: according to minimum value
the value of middle i and j, and i and the j value of correspondence is searched high-rise interference designator H(j, i) whether value equal 1, if then corresponding user terminal is divided into type G2, otherwise the user terminal of correspondence divided into type G1;
S500: be α to district's path loss compensating factor α assignment of the user terminal of type G1
1, the cel l path loss balancing factor assignment of the user terminal of type G2 is α
2, wherein α
1for the value specified in 3GPP standard, α
2value be less than α
1;
S600: the α set by application
1and α
2value, carry out power control according to LTE open-loop uplink power control method in 3GPP standard, wherein, described LTE open-loop uplink power control method is: p=min{P
max, P
0+ 10*log
10 m+ α * PL+ Δ mcs+ δ }.
Wherein, described its value of the cel l path loss balancing factor is 0 or [0.4:0.1:1].
Wherein, the user terminal of required measuring and calculating only comprises six cellular cells with the Serving cell direct neighbor of user terminal, i.e. described j=1,2,3 to neighbor cell base station j uplink pathloss ... 6.
Wherein, described high level interference designator H(j, i) carried by the exchange interference indication message regularly sent between cell base station, it is transmitted by X2 interface.
In order to solve the problems of the technologies described above, the present invention also provides a kind of LTE up-link power control system based on interference consciousness, comprises a base station in service sector k, multiple neighbor cell base station j adjacent with base station in service sector k and user terminal i;
Described user terminal comprises predicting unit, computing unit and Transmit-Receive Unit, and described base station in service sector k comprises interference indication message crosspoint, user terminal taxon, memory cell and power compensating unit;
Described predicting unit is used for according to the path loss of down link, measuring and calculating user terminal to its base station in service sector K path loss and use
represent, and measuring and calculating user terminal to neighbor cell base station j path loss and use
represent;
Described computing unit is for calculating the path loss of described user terminal to its base station in service sector k
with described user terminal to neighbor cell base station j path loss
between difference, choose the middle minimum value in institute's calculated difference, and described minimum value be labeled as
namely
The minimum value that described Transmit-Receive Unit is used for computing unit marks is
time j and i send to base station in service sector k;
Described interference indication message crosspoint, for sending area interference indicator message to adjacent base station and the interference indication message that sends of base station, reception of neighboring cell j, wherein, comprises high-rise interference designator H(j, i in described interference indication message); Whether its value causes interference to determine to neighbor cell base station j by user terminal i; If so, then mark H(j, i)=1, otherwise mark H(j, i)=0, described interference indication message crosspoint is also for disturbing designator H(j, i) value be stored in described memory cell;
Described user terminal taxon is used for i and the j value according to receiving, i and the j value of correspondence is searched described high level interference designator H(j, i) whether 1 is equaled, as described high level interference designator H(j, when i)=1, corresponding user terminal is divided into type G2, and for disturbing designator H(j when described high level, when i)=0, corresponding user terminal is divided into type G1;
It is α that described power compensating unit is used for the cel l path loss balancing factor assignment of the user terminal of type G2
2, and be α to the cel l path loss balancing factor-alpha assignment of the user terminal of type G1
1, described power compensating unit also for according in 3GPP standard LTE open-loop uplink power control method use set by α
1and α
2value carries out power control, wherein, and α
1for the value specified in 3GPP standard, α
2value be less than α
1, described LTE open-loop uplink power control method p=min{P
max, P
0+ 10*log
10 m+ α * PL+ Δ mcs+ δ }.
Wherein, base station in service sector k, multiple neighbor cell base station js adjacent with base station in service sector form the shape of honeycomb type.
Wherein, the interference indication message crosspoint of described base station in service sector k and described multiple neighbor cell base station j exchange periodically interference indication message by X2 interface.
The invention has the beneficial effects as follows: the present invention is by the path loss of measuring and calculating user terminal i to its base station in service sector k
with user terminal i to its neighbor cell base station j path loss
between difference, choose minimum value wherein, and combined by high-rise interference designator and judge whether user terminal disturbs each cell base station, user terminal is categorized as G1 and G2 two type, according to the type that user terminal divides, respectively to the cel l path loss balancing factor assignment α of G1 and G2 two type user terminal i
1and α
2, the uplink users terminal i corresponding due to G1 only can cause minimum interference even not produce interference to neighbor cell, therefore α
1value carry out assignment according to prescribed manner in 3GPP standard, and uplink users terminal i corresponding to G2 can cause strong jamming to neighbor cell, therefore α
2value for being slightly less than α
1a suitable value, thus the classification of completing user terminal type and path loss parameter setting, assignment foundation expression formula is:
α=α
1（user∈G1）
α=α
2（user∈G2）
According to set α
1and α
2value, resets other power contorl parameters of community user terminal i, carries out power control according to the LTE open-loop uplink power control method in 3GPP standard.
Considering that the power of user-terminal up-link controls, classify to user terminal in the strong and weak basis of presence of intercell interference, be type G1 and type G2 according to class of subscriber class, different cel l path loss balancing factor-alphas carries out power control, on the basis meeting subscriber terminal service quality, effectively can reduce the interference of up link between LTE system small area, improve the practical efficiency of user terminal energy.The transmitting power of user terminal i up link is all Optimal Setting path loss parameter thus carry out the adjustment of power on the basis according to user terminal presence of intercell interference power, simultaneity factor can on the basis of existing power control scheme enterprising one-step optimization power contorl parameters of advancing, improve the validity of power control scheme and real-time.
Accompanying drawing explanation
Figure 1 shows that a kind of LTE uplink power control method flow chart based on interference consciousness of the present invention;
Figure 2 shows that a kind of LTE uplink power control method outline flowchart based on interference consciousness of the present invention;
That user terminal of the present invention is to cell base station uplink pathloss instrumentation plan shown in Fig. 3;
It is LTE uplink presence of intercell interference schematic diagram of the present invention shown in Fig. 4;
It is minizone of the present invention high level interference designator HII schematic diagram shown in Fig. 5;
That the present invention proposes in power control scheme and 3GPP standard between power control scheme Performance comparision sample network topology figure shown in Fig. 6.
Embodiment
By describing technology contents of the present invention, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
A kind of LTE uplink power control method based on interference consciousness of present embodiment, LTE is the forth generation mobile communication technology standard that 3GPP dominates, LTE comprises FDD-LTE and TD-LTE, power control is the key technology of LET system physical layer, the target that LTE system up-link power controls meets on the required signal-to-noise ratio basis of QoS of customer, reduces the interference to neighbor cell as far as possible.
The present invention utilizes the up link HII in LTE system between neighbor cell base station and user to be foundation to the path loss characteristics of cell base station, uplink users in cellular cell is divided into strong jamming and weak jamming two large user classification, different cel l path loss balancing factor-alphas is distributed according to class of subscriber, power control is carried out according to different path loss compensating factors, on the basis meeting subscriber terminal service quality, uplink channel interference between effective reduction LTE system small area, consult Fig. 1, the specific implementation step of present embodiment is as follows:
S100: according to the path loss of user terminal down link, measuring and calculating user terminal i is to multiple neighbor cell base station j uplink pathloss and use
represent, calculate the path loss of user terminal i to its base station in service sector k and use
represent; Concrete, consult shown in Fig. 3, in figure, CELL0 to CELL6 is cell base station, and CELL0 is user terminal UE
0i 0base station in service sector k, CELL1 to CELL6 is its neighbor cell base station j.
S200: measuring and calculating user terminal is to the path loss of its base station in service sector k
with user terminal to its neighbor cell base station j path loss
between difference, choose wherein minimum value, and described minimum value be labeled as
namely
path loss
with
be worth more close, the interference power that representative may produce this neighbor cell base station j is larger.
S300: base station in service sector k and neighbor cell base station j exchange interference indication message, high-rise interference designator H(j is comprised in described interference indication message, i), whether its value causes interference to determine to neighbor cell base station j by user terminal i, if then represent that it is labeled as H(j to its value that adjacent cell j is easily interference, i)=1, otherwise H (j, i)=0;
S400: according to minimum value
the value of middle i and j, and i and the j value of correspondence is searched high-rise interference designator H(j, i) whether value equal 1, if then corresponding user terminal is divided into type G2, otherwise the user terminal of correspondence divided into type G1; Definite division is corresponding
other adjacent cells outside the j of community
value is for null, and mean that it is less or do not produce interference to the interference of adjacent cells, value is not null's
mean that the user terminal of Serving cell may cause larger presence of intercell interference to the neighbor cell j of correspondence, the basis for estimation of this process is:
S500: be α to district's path loss compensating factor α assignment of the user terminal of type G1
1, the cel l path loss balancing factor assignment of the user terminal of type G2 is α
2, wherein α
1for the value specified in 3GPP standard, its value is 0 or [0.4:0.1:1], α
2value be slightly less than α
1;
S600: the α set by application
1and α
2value, carry out power control according to LTE open-loop uplink power control method in 3GPP standard, wherein, described LTE open-loop uplink power control method is: p=min{P
max, P
0+ 10*log
10 m+ α * PL+ Δ mcs+ δ }.
Wherein parameter P
maxrepresent the maximum transmission power of travelling carriage, depend on the type of travelling carriage;
P
0represent community user power bias, it is made up of cell-specific parameters and user's special parameter two parts,
Span is [-124dbm, P
max], by regulating P
0the signal to noise ratio target of receiving terminal can be controlled;
M is the Radio Resource number of blocks distributing to mobile station terminal;
PL is the path loss of travelling carriage according to downlink estimation;
Δ mcs is correction factor, and its value depends on the modulating-coding pattern of user;
δ is the specific correction parameter of user, and it carrys out optimization system performance by regulating user emission power.
α is the path loss compensating factor of community, and described its value of the cel l path loss balancing factor is 0 or [0.4:0.1:1].
The improvement of above-mentioned execution mode has, and the user terminal of required measuring and calculating only comprises six cellular cells with the Serving cell direct neighbor of user terminal, i.e. described j=1,2,36 to neighbor cell base station j path loss.The cell uplink path loss ignoring indirect neighbor is measured, and it estimates to obtain on the basis of uplink downlink path loss.
One preferred embodiment in, described high level interference designator H(j, i) carried by the exchange interference indication message regularly sent between cell base station, it is transmitted by X2 interface.
In above-mentioned execution mode, concrete can be divided into four-stage, comprising: user-terminal up-link path loss measurements and calculations stage, the high-rise interference indication message transfer phase in minizone, the user terminal sorting phase of Serving cell, user terminal set path loss parameter alpha carry out the power adjusting stage.Consult Fig. 2, the process in each concrete stage is as follows:
One, the user-terminal up-link path loss measurements and calculations stage
For the cellular network architecture of LTE system, consider the structural representation of base station in service sector and neighbor cell base station, as shown in Figure 3, show in figure, user terminal measurement and estimating user terminal are used to the path loss of the up link of base station in service sector
represent, user terminal is used respectively to the path loss of neighbor cell base station
Represent.
Calculate the uplink pathloss of user terminal to base station in service sector respectively
with user terminal to neighbor cell base station j(j=1,2 ... 6) up link road path loss
Between absolute difference, calculation expression is
And use variable
represent.
According to required value difference absolute with neighbor cell base station
and try to achieve the absolute value difference of minimum path loss
(j is a particular value in 1-6), definite division is corresponding
other neighbor cell outside the j of community
value is null, and value is not null's
mean that the user terminal being positioned at Serving cell may cause larger presence of intercell interference to the j base station, neighbor cell of correspondence.
Second stage: the high-rise interference indication message transfer phase in each minizone
Base station in service sector is by the base station exchange interference indication message of X2 interface and neighbor cell, LTE cellular network uplink inter-cell interference schematic diagram as shown in Figure 3, the transmission of represented by dotted arrows interference indication message in figure, as can be seen from Figure 4 user terminal UE3, UE4 of center of housing estate only can cause weak jamming to adjacent six communities, and user terminal UE1, UE2, UE5, UE6 of cell edge region can cause strong jamming to adjacent six communities.
The above-mentioned presence of intercell interference available interference identifier H (j caused, i) represent, the high level interference designator that base station in service sector represented by Fig. 5 receives can use the matrix notation of 6*6, wherein H (j, i) the interference identifier using physical radio resource block i to cause neighbor cell j is represented, user terminal distributes physics wireless resource block i and strong jamming may be caused then to make corresponding interference designator H (j to neighbor cell j, i)=1 represents, otherwise H (j, i)=0.According to above-mentioned interference designator definition, the interference message matrix of minizone can be obtained as shown in Figure 5, as can be seen from Fig. because user terminal UE1, UE2, UE5, UE6 may cause strong jamming to adjacent six communities, therefore corresponding H (j, i)=1(j=1,2 ... 6, i=1,2,5,6), and H (j, i)=0 of correspondence (j=1,2 ... 6, i=3,4).Above-mentioned interference message matrix H is exchanged by X2 interface and neighbor cell, thus obtains interference indication message between neighbor cell base station.
Phase III: the user terminal sorting phase of Serving cell
Gained is calculated according to the first stage
get the value of i and j in its corresponding subscript and subscript respectively, and search H (j in high-rise interference designator matrix with i and the j value of correspondence, i) whether value equals 1, if it is corresponding user terminal is divided into type G2, the uplink users of its correspondence can cause strong jamming to neighbor cell, if otherwise the user terminal of correspondence were divided into type G1, the uplink users of its correspondence only could cause weak jamming to neighbor cell.Under the process calculated can represent:
Fourth stage: user terminal carries out the power adjusting stage according to classification set path loss parameter alpha
According to the type that user terminal divides, respectively to the cel l path loss balancing factor assignment α of G1 and G2 two type user
1and α
2, the uplink users corresponding due to G1 only can cause weak jamming to neighbor cell, therefore α
1value carry out assignment according to prescribed manner in 3GPP standard, and uplink users corresponding to G2 can cause strong jamming to neighbor cell, therefore α
2value for being slightly less than α
1a suitable value, thus the classification of completing user terminal type and path loss parameter setting, assignment foundation expression formula is:
α=a1(user∈G1)
α=a2(user∈G2)
According to set α
1and α
2value, then according to existing power contorl parameters, carry out power control according to the LTE open-loop uplink power control method in 3GPP standard.
Technical scheme of the present invention, considering that the power of user-terminal up-link controls to classify to user terminal on the strong and weak basis of presence of intercell interference, different cel l path loss balancing factor-alphas is distributed respectively according to class of subscriber, power control is carried out according to different path loss compensating factor α, on the basis meeting subscriber terminal service quality, effectively can reduce the interference of up link between LTE system small area, improve user terminal energy ecology.With web results as shown in Figure 6, validity of the present invention is described, according to above-mentioned analytic process, if do not consider the interference of minizone, if specify the cel l path loss balancing factor of user terminal UE in Serving cell to be set to identical value according to 3GPP standard, terminal UE J is owing to being in center of housing estate, therefore strong jamming can not be caused to neighbor cell, and UEI is owing to being in cell edge, then can cause causing strong jamming to neighbor cell, namely the dotted line shown in figure represents the interference of UEI to neighbor cell base station.And the method adopting the present invention to propose, then can user terminal UEI and UEJ be divided into dissimilar and distribute different path loss compensating factors, specified to set by 3GPP standard to the path loss compensating factor of UEI, the path loss compensating factor that one is slightly less than UEJ is then distributed to UEI, on the basis meeting subscriber terminal service quality, effectively can reduce the interference of up link between LTE system small area.
The present invention, up link HI I(HighInterference Indicator in comprehensive utilization LTE system between neighbor cell base station) and user terminal determine whether user really can cause presence of intercell interference to path loss two parameters of base station in service sector, and exchange above-mentioned presence of intercell interference identifier information by X2 interface and calculate the transmit power parameter that user's path loss regulates user terminal, by jointly to consider and the relation of calculating path loss and presence of intercell interference identifier is divided into strong jamming and weak jamming two large user classification the uplink users in non-serving cells, and distribute different cel l path loss balancing factor-alphas respectively according to class of subscriber and carry out power control, avoid the improper and presence of intercell interference forecasting inaccuracy of the setting of interference threshold value and really affect Poewr control method performance.
In addition, the present invention proposes the uplink power control scheme based on interference consciousness on the basis of 3GPP open-loop uplink power control scheme, the power that the scheme proposed is adapted to the up link of LTE system controls and effectively can reduce the interference of minizone, without the need to changing existing signaling protocol and the power control procedures of LTE system, there is good compatibility, be effectively supplementing of LTE system uplink power control scheme, and can effectively avoid power control scheme to need carry out complicated calculating and and cause power division unjustness between user.
The present invention also discloses a kind of LTE up-link power control system based on interference consciousness, comprises a base station in service sector k, multiple neighbor cell base station j adjacent with base station in service sector k and user terminal i; Base station in service sector k, multiple neighbor cell base station js adjacent with base station in service sector form the shape of honeycomb type.
Described user terminal comprises predicting unit, computing unit and Transmit-Receive Unit, and described base station in service sector k comprises interference indication message crosspoint, user terminal taxon, memory cell and power compensating unit;
Described predicting unit is used for according to the path loss of down link, measuring and calculating user terminal to its base station in service sector K path loss and use
represent, and measuring and calculating user terminal to neighbor cell base station j path loss and use
represent;
Described computing unit is for calculating the path loss of described user terminal to its base station in service sector k
with described user terminal to neighbor cell base station j path loss
between difference, choose the middle minimum value in institute's calculated difference, and described minimum value be labeled as
namely
The minimum value that described Transmit-Receive Unit is used for computing unit marks is
time j and i send to base station in service sector k; Interference indication message crosspoint and described multiple neighbor cell base station j of described base station in service sector k exchange periodically interference indication message by X2 interface.
Described interference indication message crosspoint is used for generating interference indication message according to j and i received and exchanging interference indication message with neighbor cell base station j, wherein, comprises high-rise interference designator H(j, i in described interference indication message); Whether its value causes interference to determine to neighbor cell base station j by user terminal i; If so, then mark H(j, i)=1, otherwise mark H(j, i)=0, described interference indication message crosspoint is also for disturbing designator H(j, i) value be stored in described memory cell;
Described user terminal taxon is used for i and the j value according to receiving, i and the j value of correspondence is searched described high level interference designator H(j, i) whether 1 is equaled, as described high level interference designator H(j, when i)=1, corresponding user terminal is divided into type G2, and for disturbing designator H(j when described high level, when i)=0, corresponding user terminal is divided into type G1;
It is α that described power compensating unit is used for the cel l path loss balancing factor assignment of the user terminal of type G2
2, and be α to the cel l path loss balancing factor-alpha assignment of the user terminal of type G1
1, described power compensating unit also for according in 3GPP standard LTE open-loop uplink power control method use set by α
1and α
2value carries out power control, wherein, and α
1for the value specified in 3GPP standard, α
2value be less than α
1, described LTE open-loop uplink power control method p=min{P
max, P
0+ 10*log
10 m+ α * PL+ Δ mcs+ δ }.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1., based on a LTE uplink power control method for interference consciousness, it is characterized in that, comprise the steps:
S100: according to the path loss of user terminal i down link, measuring and calculating user terminal i is to multiple neighbor cell base station j uplink pathloss and use
represent, calculate the path loss of user terminal i to its base station in service sector k and use
represent, wherein k represents base station in service sector; I represents user terminal; Ki represents k and i two parameters respectively;
S200: the path loss of measuring and calculating user terminal i to its base station in service sector k
with neighbor cell base station j path loss
between difference, choose wherein minimum value, and described minimum value be labeled as
namely
minimum value is by user terminal
time j and i send to base station in service sector k;
S300: base station in service sector k and neighbor cell base station j exchange interference indication message, high-rise interference designator H (j is comprised in described interference indication message, i), whether its value causes interference to determine to neighbor cell base station j by user terminal i, if then represent that it is labeled as H (j to its value that adjacent cell j is easily interference, i)=1, otherwise H (j, i)=0;
S400: according to minimum value
the value of middle i and j, and i and the j value of correspondence is searched high-rise interference designator H (j, i) value and whether equal 1, if then corresponding user terminal is divided into type G2, otherwise the user terminal of correspondence is divided into type G1;
S500: be α to district's path loss compensating factor α assignment of the user terminal of type G1
1, the cel l path loss balancing factor assignment of the user terminal of type G2 is α
2, wherein α
1for the value specified in 3GPP standard, α
2value be less than α
1;
S600: the α set by application
1and α
2value, carry out power control according to LTE open-loop uplink power control method in 3GPP standard, wherein, described LTE open-loop uplink power control method is: p=min{P
max, P
0+ 10*log
10 m+ α * PL+ Δ mcs+ δ }, wherein parameter P
maxrepresent the maximum transmission power of travelling carriage, depend on the type of travelling carriage; P
0represent community user power bias, it is made up of cell-specific parameters and user's special parameter two parts, and span is [-124dbm, P
max], by regulating P
0the signal to noise ratio target of receiving terminal can be controlled; M is the Radio Resource number of blocks distributing to mobile station terminal; PL is the path loss of travelling carriage according to downlink estimation; Δ mcs is correction factor, and its value depends on the modulating-coding pattern of user; δ is the specific correction parameter of user, and it carrys out optimization system performance by regulating user emission power; α is the path loss compensating factor of community, and described its value of the cel l path loss balancing factor is 0 or [0.4:0.1:1].
2. the LTE uplink power control method based on interference consciousness according to claim 1, is characterized in that:
The user terminal of required measuring and calculating only comprises six cellular cells with the Serving cell direct neighbor of user terminal, i.e. described j=1,2,36 to neighbor cell base station j uplink pathloss.
3. the LTE uplink power control method based on interference consciousness according to claim 1, is characterized in that:
Described high level interference designator H (j, i) is carried by the exchange interference indication message regularly sent between cell base station, and it is transmitted by X2 interface.
4., based on a LTE up-link power control system for interference consciousness, it is characterized in that: comprise a base station in service sector k, multiple neighbor cell base station j adjacent with base station in service sector k and user terminal i;
Described user terminal comprises predicting unit, computing unit and Transmit-Receive Unit, and described base station in service sector k comprises interference indication message crosspoint, signal disturbing detecting unit, user terminal taxon, memory cell and power compensating unit;
Described predicting unit is used for the path loss according to down link, calculates the path loss of user terminal i to its base station in service sector K and uses
represent, and measuring and calculating user terminal to neighbor cell base station j path loss and use
represent, wherein k represents base station in service sector; I represents user terminal; Ki represents k and i two parameters respectively;
Described computing unit is for calculating the path loss of described user terminal to its base station in service sector k
with described user terminal to neighbor cell base station j path loss
between difference, choose the middle minimum value in institute's calculated difference, and described minimum value be labeled as
namely
The minimum value that described Transmit-Receive Unit is used for computing unit marks is
time j and i send to base station in service sector k;
Described interference indication message crosspoint is used for generating interference indication message according to j and i received and exchanging interference indication message with neighbor cell base station j, wherein, comprises high-rise interference designator H (j, i) in described interference indication message; Whether its value causes interference to determine to neighbor cell base station j by user terminal i; If so, H (j, i)=1 is then marked, otherwise mark H (j, i)=0, described interference indication message crosspoint is also for disturbing the value of designator H (j, i) to be stored in described memory cell;
Described user terminal taxon is used for i and the j value according to receiving, i and the j value of correspondence is searched described high level interference designator H (j, i) whether 1 is equaled, as described high level interference designator H (j, when i)=1, corresponding user terminal is divided into type G2, and for disturbing designator H (j when described high level, when i)=0, corresponding user terminal is divided into type G1;
It is α that described power compensating unit is used for the cel l path loss balancing factor assignment of the user terminal of type G2
2, and be α to the cel l path loss balancing factor-alpha assignment of the user terminal of type G1
1, described power compensating unit also for according in 3GPP standard LTE open-loop uplink power control method use set by α
1and α
2value carries out power control, wherein, and α
1for the value specified in 3GPP standard, α
2value be less than α
1, described LTE open-loop uplink power control method is:
P=min{P
max, P
0+ 10*log
10 m+ α * PL+ Δ mcs+ δ }, wherein parameter P
maxrepresent the maximum transmission power of travelling carriage, depend on the type of travelling carriage; P
0represent community user power bias, it is made up of cell-specific parameters and user's special parameter two parts, and span is [-124dbm, P
max], by regulating P
0the signal to noise ratio target of receiving terminal can be controlled; M is the Radio Resource number of blocks distributing to mobile station terminal; PL is the path loss of travelling carriage according to downlink estimation; Δ mcs is correction factor, and its value depends on the modulating-coding pattern of user; δ is the specific correction parameter of user, and it carrys out optimization system performance by regulating user emission power; α is the path loss compensating factor of community, and described its value of the cel l path loss balancing factor is 0 or [0.4:0.1:1].
5. the LTE up-link power control system based on interference consciousness according to claim 4, is characterized in that:
Base station in service sector k, multiple neighbor cell base station js adjacent with base station in service sector form the shape of honeycomb type.
6. the LTE up-link power control system based on interference consciousness according to claim 5, is characterized in that: interference indication message crosspoint and described multiple neighbor cell base station j of described base station in service sector k exchange periodically interference indication message by X2 interface.
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| CN104254121B (en) * | 2013-06-28 | 2018-05-29 | 电信科学技术研究院 | A kind of PUSCH Poewr control methods and device |
| CN104661296B (en) * | 2013-11-25 | 2019-06-11 | 株式会社Ntt都科摩 | The device and method for determining the transmission power of user equipment |
| CN105517115B (en) * | 2014-09-26 | 2019-11-29 | 南京中兴新软件有限责任公司 | The method, apparatus and base station that serving BS determines |
| WO2018080363A1 (en) * | 2016-10-28 | 2018-05-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Enabling interference-aware configuration of at least one transmission and/or interference suppression in a cellular communication system |
| CN106899965B (en) * | 2017-03-16 | 2020-08-18 | 北京佰才邦技术有限公司 | Configuration method of transmission power, terminal, base station and baseband chip |
| CN109802733B (en) * | 2017-11-17 | 2022-06-10 | 华为技术有限公司 | Method and apparatus for signal measurement |
| CN110139351B (en) * | 2018-02-08 | 2022-07-15 | 中国移动通信有限公司研究院 | Power control method, device, equipment and storage medium |
| CN111937449B (en) * | 2018-04-05 | 2024-05-28 | 瑞典爱立信有限公司 | Method and device for controlling uplink power of aviation UE depending on air state |
| CN111163488A (en) * | 2018-11-07 | 2020-05-15 | 中国移动通信集团四川有限公司 | Method, device and equipment for positioning cell interference source and computer storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986752A (en) * | 2010-11-04 | 2011-03-16 | 杭州市电信规划设计院有限公司 | Control method of uplink power of long term evolution (LTE) system |
| WO2011018557A3 (en) * | 2009-08-14 | 2011-04-14 | Nokia Corporation | Method and apparatus for managing interference handling overhead |
| CN102056178A (en) * | 2011-01-17 | 2011-05-11 | 新邮通信设备有限公司 | Interference coordination method among cells and evolved NodeB (eNB) |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011018557A3 (en) * | 2009-08-14 | 2011-04-14 | Nokia Corporation | Method and apparatus for managing interference handling overhead |
| CN101986752A (en) * | 2010-11-04 | 2011-03-16 | 杭州市电信规划设计院有限公司 | Control method of uplink power of long term evolution (LTE) system |
| CN102056178A (en) * | 2011-01-17 | 2011-05-11 | 新邮通信设备有限公司 | Interference coordination method among cells and evolved NodeB (eNB) |
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