CN105722199A - Scheduling method, network device and scheduling system - Google Patents
Scheduling method, network device and scheduling system Download PDFInfo
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- CN105722199A CN105722199A CN201410736253.5A CN201410736253A CN105722199A CN 105722199 A CN105722199 A CN 105722199A CN 201410736253 A CN201410736253 A CN 201410736253A CN 105722199 A CN105722199 A CN 105722199A
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Abstract
The invention discloses a scheduling method, a network device and a scheduling system. The scheduling method includes the steps: acquiring the statistical channel information, of M user terminals, sent from at least one second network device; according to the statistical channel information of the M user terminals and a first preset condition, respectively selecting M second network devices for the M user terminals; according to a second preset condition, respectively determining the down link transmitting power of the M second network devices for the user terminals; and respectively M scheduling commands for the M second network devices, and transmitting the M scheduling commands, wherein the scheduling commands carry the information indicating the user terminals corresponding to the second network devices and the down link transmitting power for the user terminals.
Description
Technical field
The present invention relates to the dispatching technique of the communications field, particularly relate to a kind of dispatching method, the network equipment and system.
Background technology
Dense distribution formula cordless communication network, in the cell intensive laying Remote Access Unit (RAU), each RAU is connected by high-speed link with center processing unit.The access distance between user terminal and aerial array can be shortened by intensive laying RAU in community, it is thus achieved that the advantage of low propagation loss and high spatial multiplexing.But, in dense distribution formula cordless communication network, owing to backhaul link capacity is limited, so by sharing the transient channel information of all user terminals and then carrying out the more difficult enforcement of way of power distribution, thus more difficult lifting system-power efficiency.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of dispatching method, the network equipment and system, at least can solve the problem that the problems referred to above that prior art exists.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The present invention provides a kind of dispatching method, is applied to first network equipment, and described method includes:
Getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；
Statistic channel information according to described M user terminal and first pre-conditioned, chooses M second network equipment respectively for described M user terminal；
Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；
Generate M dispatch command respectively for described M two network equipments, send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
In such scheme, pre-conditioned according to the statistic channel information of described M user terminal and first, choose M second network equipment respectively for described M user terminal, including:
User terminal is selected successively as first user terminal from described M user terminal；
The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose the transfer rate second network equipment more than the first predetermined threshold value for described first user terminal.
In such scheme, described pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, including:
Obtain the transfer rate of M user terminal, according to described transfer rate, described M user terminal is ranked up；
From remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal；
Calculate the transmitting power sum obtaining whole described M second network equipment as the second predetermined threshold value；
Down-link transmitting power between described second network equipment corresponding for first user terminal and described first user terminal is adjusted so that described second network equipment utilizes the down-link transmitting power after adjusting to ensure that the transfer rate between described second network equipment and described user terminal is be more than or equal to the first predetermined threshold value；
Calculate the transmitting power sum of whole described M second network equipment as the transmitting power sum after adjusting；
Judge that whether the transmitting power sum after described adjustment is less than described second predetermined threshold value, if less than, then described first network equipment is set to the adjusted network equipment, return from remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal.
Present invention also offers a kind of dispatching method, be applied to second network equipment, described method includes:
Get the statistic channel information of at least one user terminal；
Send the statistic channel information of at least one user terminal described to first network equipment；
Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
In such scheme, described in get the statistic channel information of at least one user terminal, including:
Get the detectable signal that at least one user terminal is sent；
The statistic channel information of at least one user terminal described is determined according to described detectable signal.
In such scheme, the described statistic channel information determining at least one user terminal described according to described detectable signal, including:
Described detectable signal is utilized to calculate the uplink channel parameters obtaining at least one user terminal described；
The uplink channel parameters utilizing at least one user terminal described calculates the up-link statistic channel information and described downlink statistic channel information that obtain at least one user terminal described；
Utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.
Present invention also offers a kind of network equipment, the described network equipment includes:
First communication unit, for getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；Send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal
Scheduling unit, pre-conditioned for the statistic channel information according to described M user terminal and first, choose M second network equipment respectively for described M user terminal；Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；M dispatch command is generated respectively for described M two network equipments.
In such scheme, described scheduling unit, specifically for selecting user terminal successively as first user terminal from described M user terminal；The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose the transfer rate second network equipment more than the first predetermined threshold value for described first user terminal.
In such scheme, described scheduling unit, specifically for obtaining the transfer rate of M user terminal, according to described transfer rate, described M user terminal is ranked up；From remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal；Calculate the transmitting power sum obtaining whole described M second network equipment as the second predetermined threshold value；Down-link transmitting power between described second network equipment corresponding for first user terminal and described first user terminal is adjusted so that described second network equipment utilizes the down-link transmitting power after adjusting to ensure that the transfer rate between described second network equipment and described user terminal is be more than or equal to the first predetermined threshold value；Calculate the transmitting power sum of whole described M second network equipment as the transmitting power sum after adjusting；Judge that whether the transmitting power sum after described adjustment is less than described second predetermined threshold value, if less than, then described first network equipment is set to the adjusted network equipment, return from remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal.
Present invention also offers a kind of network equipment, the described network equipment includes:
Second communication unit, for sending the statistic channel information of at least one user terminal described to first network equipment；Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal；
Computing unit, for getting the statistic channel information of at least one user terminal.
In such scheme, described second communication unit, it is additionally operable to get the detectable signal that at least one user terminal is sent；
Accordingly, described computing unit, it is additionally operable to determine the statistic channel information of at least one user terminal described according to described detectable signal.
In such scheme, described computing unit, the uplink channel parameters obtaining at least one user terminal described specifically for utilizing described detectable signal to calculate；The uplink channel parameters utilizing at least one user terminal described calculates the up-link statistic channel information and described downlink statistic channel information that obtain at least one user terminal described；Utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.
Present invention also offers a kind of dispatching patcher, described system includes:
First network equipment, for getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；Statistic channel information according to described M user terminal and first pre-conditioned, chooses M second network equipment respectively for described M user terminal；Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；Generate M dispatch command respectively for described M two network equipments, send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal；
Second network equipment, for getting the statistic channel information of at least one user terminal；Send the statistic channel information of at least one user terminal described to first network equipment；Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
Dispatching method provided by the present invention, the network equipment and system, after the statistic channel information of user terminal can be got, pre-conditioned and second pre-conditioned combine according to first, choosing second network equipment of correspondence for user terminal and distribute transmitting power, the transmitting power sum of whole second network equipments in control current system is lower than the second predetermined threshold value；So, distribute with power by utilizing statistic channel information to be scheduling, it is more easy to enforcement than obtaining transient channel information, can also while the transfer rate that ensure that between user terminal and second network equipment, reduce the transmitting power of second network equipment as far as possible, thus, improve system-power efficiency.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention dispatching method schematic flow sheet one；
Fig. 2 is that the embodiment of the present invention determines the second network equipment down-link transmitting power schematic flow sheet；
Fig. 3 is the schematic flow sheet that embodiment of the present invention exemplary scene is corresponding；
Fig. 4 is embodiment of the present invention dispatching method schematic flow sheet two；
Fig. 5 is the method flow schematic diagram that the embodiment of the present invention determines statistic channel information；
Fig. 6 is embodiment of the present invention network equipment composition structural representation one；
Fig. 7 is embodiment of the present invention network equipment composition structural representation two；
Fig. 8 is embodiment of the present invention dispatching patcher composition structural representation；
Fig. 9 is that the embodiment of the present invention implements scene composition schematic diagram.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
Embodiment one,
The embodiment of the present invention proposes a kind of dispatching method, is applied to first network equipment, as it is shown in figure 1, include:
Step 101: get the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；
Step 102: pre-conditioned according to the statistic channel information of described M user terminal and first, chooses M second network equipment respectively for described M user terminal；
Step 103: pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；
Step 104: generate M dispatch command respectively for described M two network equipments, send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
Here, implementing of above-mentioned steps 101 can be: one or more second network equipments periodically connected from self, obtains the statistic channel information of M the user terminal that the one or more second network equipment is connected to；
Or, self the statistic channel information of periodic active upload M the user terminal of one or more network equipments connected.
Wherein, described periodicity can be according to practical situation, the duration of setting, such as, it is possible to obtain once for being set to every five minutes, or can be obtain once for each minute.So, can pass through to arrange the acquisition cycle or the setting cycle of uploading avoids the transient channel information of upload user terminal of the second network equipment real-time, thus reducing the use frequency of the calculating resource of first network equipment, and then ensure that other process resources of first network equipment.
Wherein, described statistic channel information may include that the transfer rate of user terminal.
Described first network equipment can be the center processing unit in network.Described second network equipment can be the RAU that described center processing unit connects.
Preferably, pre-conditioned according to the statistic channel information of described M user terminal and first, choose M second network equipment respectively for described M user terminal and may include that
User terminal is selected successively as first user terminal from described M user terminal；
The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose the transfer rate second network equipment more than the first predetermined threshold value for described first user terminal.Wherein, described first predetermined threshold value is the numerical value arranged according to practical situation.
Or, the statistic channel information according to described M user terminal, choose M second network equipment respectively for described M user terminal and may include that
User terminal is selected successively as first user terminal from described M user terminal；
The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose transfer rate at least one second network equipment more than the first predetermined threshold value of downlink for described first user terminal；
From at least one second network equipment described, extract second network equipment one by one mate with described first user terminal；
Calculate the currently downlink of whole second network equipments transfer rate and, during when the transfer rate of described downlink with more than three predetermined threshold value, using described second network equipment that extracts as second network equipment corresponding to described first user terminal.Wherein, described first predetermined threshold value and the 3rd predetermined threshold value are the numerical value arranged according to practical situation.
Described in the present embodiment, greedy dispatching algorithm specifically can adopt below equation:
P=[pi=p],
Wherein,Representing that the set of each second network equipment can only serve a user terminal, i is the positive integer be more than or equal to 1, and j is the positive integer be more than or equal to 1；
NthRepresent the number of maximum second network equipments in the second sets of network devices, for instance, it is possible to set NthIt is 1～3；
P=[pi=p],The transmitting power of expression user terminal is default transmitting power p；
RthRepresent the first predetermined threshold value；Wherein, RiIdentify described transfer rate；
The expression formula of speed sum during described downlink communication is:
Wherein,Represent the speed when user terminal in set of user terminals carries out downlink communication with the set of the second corresponding network equipment and；IMUnit matrix for M × M.
So, average and the speed maximal criterion according to system, and meet the transfer rate of described M user terminal more than Mean Speed, or at most and meet the Mean Speed that every user terminal is certain according to the user terminal number of system service, second network equipment of the user terminal in community and correspondence thereof is scheduling.
Described pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, as in figure 2 it is shown, may include that
Step 201: obtain the transfer rate of M user terminal, according to described transfer rate, described M user terminal is ranked up；
Step 202: from remaining whole unadjusted user terminals, chooses the maximum user terminal of described transfer rate as first user terminal；
Step 203: calculate the transmitting power sum obtaining whole described M second network equipment as the second predetermined threshold value；
Step 204: the down-link transmitting power between described second network equipment corresponding for first user terminal and described first user terminal is adjusted so that described second network equipment utilizes the down-link transmitting power after adjusting to ensure that the transfer rate between described second network equipment and described user terminal is be more than or equal to the first predetermined threshold value；
Step 205: calculate the transmitting power sum of whole described M second network equipment as the transmitting power sum after adjusting；
Step 206: judge that whether the transmitting power sum after described adjustment is less than described second predetermined threshold value, if less than, then described first network equipment is set to the adjusted network equipment, returns and perform step 202；Otherwise, handling process is terminated.
This power optimization problem can be expressed as:
Control transmitting power minimum；
And ensure that transfer rate is be more than or equal to the first predetermined threshold value simultaneously.
Below in conjunction with assuming that second network equipment is RAU, centered by first network equipment, the embodiment of the present invention is described by processing unit, as it is shown on figure 3, include:
Step 301: each user terminal periodically sends the detectable signal RAU to vicinity, the RAU of described vicinity determines, according to the detectable signal received, the statistic channel information that each user terminal is corresponding, and sends statistic channel information corresponding to each user terminal described to center processing unit；
Step 302: user terminal, according to community and speed maximal criterion, is scheduling by described center processing unit, it is determined that use at least one user terminal that same running time-frequency resource communicates, and determine operable RAU for each user terminal.
Step 303: the user terminal of scheduling is ranked up by described center processing unit according to user's Mean Speed is descending.
Step 304: described center processing unit selects the maximum user of speed and ownership RAU thereof, and the transmitting power keeping other RAU is constant, and the ownership RAU transmitting power of maximum for speed user terminal reduces making to ensure that its Mean Speed is more than the first predetermined threshold value.
Step 305: relatively whether the transmitting power sum of all RAU reduces, if reducing, then goes to step 303；If not reducing, then finishing iteration power allocation procedure.
Visible, adopt such scheme, after just can getting the statistic channel information of user terminal, pre-conditioned and second pre-conditioned combine according to first, choosing second network equipment of correspondence for user terminal and distribute transmitting power, the transmitting power sum of whole second network equipments in control current system is lower than the second predetermined threshold value；So, distribute with power by utilizing statistic channel information to be scheduling, while the transfer rate that ensure that between user terminal and second network equipment, reduce the transmitting power of second network equipment as far as possible, thus, improve system-power efficiency；
Further, since utilize statistic channel information to be scheduling distributing with power, it is possible to avoid going in real time to gather transient channel information, thus the allocative efficiency that ensures to know clearly；
Finally, due to utilize statistic channel information to implement scheduling and power distribution so that assigning process can reduce calculation procedure, accelerates processing speed.
Embodiment two,
Present embodiments provide a kind of dispatching method, be applied to second network equipment, as shown in Figure 4, including:
Step 401: get the statistic channel information of at least one user terminal；
Step 402: send the statistic channel information of at least one user terminal described to first network equipment；
Step 403: receive the dispatch command that described first network equipment is sent, carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal in described dispatch command.
The described statistic channel information getting at least one user terminal, including: get the detectable signal that at least one user terminal is sent；The statistic channel information of at least one user terminal described is determined according to described detectable signal.
Here, described user terminal may include that the user terminal of described second network device management.
The acquisition methods of described detectable signal can be: the detectable signal periodically sent from least one user terminal of K received over subcarriers；Wherein, described periodicity can be the duration arranged according to practical situation.
Described detectable signal can send on the ofdm symbols, arranges different sub-carrier resources for different user terminals detectable signal, and antennas different in user terminal it can also be provided that send detectable signal on different subcarriers；Sub-carrier resources shared by the multiple antenna of each user is many groups sub-carrier resources of adjacent sub-carrier composition, and each antenna uses the subcarrier of different numberings in these subcarrier groups.
Assume that OFDM t easet ofasubcarriers is C={1,2 ..., MKNs, wherein M represents the dual-mode antenna number that each user terminal configures, and K represents number of users in community, NsRepresent the subcarrier group number that each user uses；The t easet ofasubcarriers shared by detectable signal sent on the m-th antenna of user terminal i is:Then the method for the described statistic channel information determining at least one user terminal described according to described detectable signal can as it is shown in figure 5, include:
Step 501: utilize described detectable signal to calculate the uplink channel parameters obtaining at least one user terminal described；
Such as, the m-th antenna of i-th user the t time slot l (i, k, m) channel parameter on individual subcarrier is calculated by following formula:Wherein,Being that the r RAU receives signal phasor, (i, k, m) detectable signal sent on individual subcarrier is x to li,t,l(i,k,m)；
Wherein, (i, k, m)=(i-1) M+ (k-1) MK+m is that the m-th antenna of i-th user uses m-th subcarrier in kth group to l.
Further, (i, k, m) channel parameter on individual subcarrier constitutes channel matrix, using the described channel matrix uplink channel parameters as user terminal at the t time slot l to utilize the m-th antenna of i-th user；
Step 502: utilize the uplink channel parameters of at least one user terminal described to calculate the up-link statistic channel information and described downlink statistic channel information obtaining at least one user terminal described；
Wherein, the statistic channel information computing formula of described downlink can be:
The reciprocity utilizing channel calculates the statistic channel information of the downlink of each user:
Wherein, subscript H represents conjugate transpose, and τ is the number of times sending detectable signal.
Step 503: utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.
Its method determined can adopt formulaRepresent；Wherein, second network equipment can be one can also be multiple network equipments, first network equipment be allocated；The method distributing second network equipment can be distributed for reason position, base area, and such as, one or more network equipments distance users terminal entered are appointed as second network equipment that this user terminal is corresponding.
Visible, adopt such scheme, after just can getting the statistic channel information of user terminal, pre-conditioned and second pre-conditioned combine according to first, choosing second network equipment of correspondence for user terminal and distribute transmitting power, the transmitting power sum of whole second network equipments in control current system is lower than the second predetermined threshold value；So, distribute with power by utilizing statistic channel information to be scheduling, while the transfer rate that ensure that between user terminal and second network equipment, reduce the transmitting power of second network equipment as far as possible, thus, improve system-power efficiency.
Embodiment three,
The embodiment of the present invention proposes a kind of network equipment, and as shown in Figure 6, the described network equipment includes:
First communication unit 61, for getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；Send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal
Scheduling unit 62, pre-conditioned for the statistic channel information according to described M user terminal and first, choose M second network equipment respectively for described M user terminal；Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；M dispatch command is generated respectively for described M two network equipments.
Here, above-mentioned first communication unit 61, one or more second network equipments periodically connected from self, obtain the statistic channel information of M the user terminal that the one or more second network equipment is connected to；Or, self the statistic channel information of periodic active upload M the user terminal of one or more network equipments connected.
Wherein, described periodicity can be according to practical situation, the duration of setting, such as, it is possible to obtain once for being set to every five minutes, or can be obtain once for each minute.So, can pass through to arrange the acquisition cycle or the setting cycle of uploading avoids the transient channel information of upload user terminal of the second network equipment real-time, thus reducing the use frequency of the calculating resource of first network equipment, and then ensure that other process resources of first network equipment.
Wherein, described statistic channel information may include that the transfer rate of user terminal.
The described network equipment can be the center processing unit in network.Described second network equipment can be the RAU that described center processing unit connects.
Preferably, described scheduling unit, specifically for selecting user terminal successively as first user terminal from described M user terminal；The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose the transfer rate second network equipment more than the first predetermined threshold value for described first user terminal.Wherein, described first predetermined threshold value is the numerical value arranged according to practical situation.Or, select user terminal successively as first user terminal from described M user terminal；The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose transfer rate at least one second network equipment more than the first predetermined threshold value of downlink for described first user terminal；From at least one second network equipment described, extract second network equipment one by one mate with described first user terminal；Calculate the currently downlink of whole second network equipments transfer rate and, during when the transfer rate of described downlink with more than three predetermined threshold value, using described second network equipment that extracts as second network equipment corresponding to described first user terminal.Wherein, described first predetermined threshold value and the 3rd predetermined threshold value are the numerical value arranged according to practical situation.
Described in the present embodiment, greedy dispatching algorithm specifically can adopt below equation:
P=[pi=p],
Wherein,Representing that the set of each second network equipment can only serve a user terminal, i is the positive integer be more than or equal to 1, and j is the positive integer be more than or equal to 1；
NthRepresent the number of maximum second network equipments in the second sets of network devices, for instance, it is possible to set NthIt is 1～3；
P=[pi=p],The transmitting power of expression user terminal is default transmitting power p；
RthRepresent the first predetermined threshold value；Wherein, RiIdentify described transfer rate；
The expression formula of speed sum during described downlink communication is:
Wherein,Represent the speed when user terminal in set of user terminals carries out downlink communication with the set of the second corresponding network equipment and；IMUnit matrix for M × M.
So, average and the speed maximal criterion according to system, and meet the transfer rate of described M user terminal more than Mean Speed, or at most and meet the Mean Speed that every user terminal is certain according to the user terminal number of system service, second network equipment of the user terminal in community and correspondence thereof is scheduling.
Described scheduling unit, specifically for obtaining the transfer rate of M user terminal, is ranked up described M user terminal according to described transfer rate；From remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal；Calculate the transmitting power sum obtaining whole described M second network equipment as the second predetermined threshold value；Down-link transmitting power between described second network equipment corresponding for first user terminal and described first user terminal is adjusted so that described second network equipment utilizes the down-link transmitting power after adjusting to ensure that the transfer rate between described second network equipment and described user terminal is be more than or equal to the first predetermined threshold value；Calculate the transmitting power sum of whole described M second network equipment as the transmitting power sum after adjusting；Judge that whether the transmitting power sum after described adjustment is less than described second predetermined threshold value, if less than, then described first network equipment is set to the adjusted network equipment, return from remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal；Otherwise, handling process is terminated.
This power optimization problem can be expressed as:
Control transmitting power minimum；
And ensure that transfer rate is be more than or equal to the first predetermined threshold value simultaneously.
Visible, adopt such scheme, after just can getting the statistic channel information of user terminal, pre-conditioned and second pre-conditioned combine according to first, choosing second network equipment of correspondence for user terminal and distribute transmitting power, the transmitting power sum of whole second network equipments in control current system is lower than the second predetermined threshold value；So, distribute with power by utilizing statistic channel information to be scheduling, while the transfer rate that ensure that between user terminal and second network equipment, reduce the transmitting power of second network equipment as far as possible, thus, improve system-power efficiency；
Further, since utilize statistic channel information to be scheduling distributing with power, it is possible to avoid going in real time to gather transient channel information, thus the allocative efficiency that ensures to know clearly；
Finally, due to utilize statistic channel information to implement scheduling and power distribution so that assigning process can reduce calculation procedure, accelerates processing speed.
Embodiment four,
Present embodiments provide a kind of network equipment, as it is shown in fig. 7, the described network equipment includes:
Second communication unit 71, for sending the statistic channel information of at least one user terminal described to first network equipment；Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal；
Computing unit 72, for getting the statistic channel information of at least one user terminal.
Here, described user terminal can include the user terminal of described network device management.
Described second communication unit 71, is additionally operable to get the detectable signal that at least one user terminal is sent；Accordingly, described computing unit 72, it is additionally operable to determine the statistic channel information of at least one user terminal described according to described detectable signal.
The acquisition methods of described detectable signal can be: the detectable signal periodically sent from least one user terminal of K received over subcarriers；Wherein, described periodicity can be the duration arranged according to practical situation.
Described detectable signal can send on the ofdm symbols, arranges different sub-carrier resources for different user terminals detectable signal, and antennas different in user terminal it can also be provided that send detectable signal on different subcarriers；Sub-carrier resources shared by the multiple antenna of each user is many groups sub-carrier resources of adjacent sub-carrier composition, and each antenna uses the subcarrier of different numberings in these subcarrier groups.
Assume that OFDM t easet ofasubcarriers is C={1,2 ..., MKNs, wherein M represents the dual-mode antenna number that each user terminal configures, and K represents number of users in community, NsRepresent the subcarrier group number that each user uses；The t easet ofasubcarriers shared by detectable signal sent on the m-th antenna of user terminal i is:Then described computing unit 72, the uplink channel parameters obtaining at least one user terminal described specifically for utilizing described detectable signal to calculate；The uplink channel parameters utilizing at least one user terminal described calculates the up-link statistic channel information and described downlink statistic channel information that obtain at least one user terminal described；Utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.
Such as, the m-th antenna of i-th user the t time slot l (i, k, m) channel parameter on individual subcarrier is calculated by following formula:Wherein,Being that the r RAU receives signal phasor, (i, k, m) detectable signal sent on individual subcarrier is x to li,t,l(i,k,m)；
Wherein, (i, k, m)=(i-1) M+ (k-1) MK+m is that the m-th antenna of i-th user uses m-th subcarrier in kth group to l.
Further, (i, k, m) channel parameter on individual subcarrier constitutes channel matrix, using the described channel matrix uplink channel parameters as user terminal at the t time slot l to utilize the m-th antenna of i-th user；
Wherein, the statistic channel information computing formula of described downlink can be:
The reciprocity utilizing channel calculates the statistic channel information of the downlink of each user:
Wherein, subscript H represents conjugate transpose, and τ is the number of times sending detectable signal.
Utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.Method can adopt formulaRepresent；Wherein, second network equipment can be one can also be multiple network equipments, first network equipment be allocated；The method distributing second network equipment can be distributed for reason position, base area, and such as, one or more network equipments distance users terminal entered are appointed as second network equipment that this user terminal is corresponding.
Visible, adopt such scheme, after just can getting the statistic channel information of user terminal, pre-conditioned and second pre-conditioned combine according to first, choosing second network equipment of correspondence for user terminal and distribute transmitting power, the transmitting power sum of whole second network equipments in control current system is lower than the second predetermined threshold value；So, distribute with power by utilizing statistic channel information to be scheduling, while the transfer rate that ensure that between user terminal and second network equipment, reduce the transmitting power of second network equipment as far as possible, thus, improve system-power efficiency.
Embodiment five,
Present embodiments provide a kind of dispatching patcher, as shown in Figure 8, including:
First network equipment 81, for getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；Statistic channel information according to described M user terminal and first pre-conditioned, chooses M second network equipment respectively for described M user terminal；Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；Generate M dispatch command respectively for described M two network equipments, send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal；
Second network equipment 82, for getting the statistic channel information of at least one user terminal；Send the statistic channel information of at least one user terminal described to first network equipment；Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal
Described in the function of above-mentioned first network equipment such as embodiment three, repeat no more here；Described in the function of second network equipment such as embodiment four, no longer repeat here equally.
Below in conjunction with Fig. 9 a kind of networking scene provided, including:
Each user terminal periodically sends the detectable signal second network equipment to vicinity, second network equipment of described vicinity determines, according to the detectable signal received, the statistic channel information that each user terminal is corresponding, and sends statistic channel information corresponding to each user terminal described to center processing unit；
User terminal, according to community and speed maximal criterion, is scheduling by described first network equipment, it is determined that uses at least one user terminal that same running time-frequency resource communicates, and determines operable second network equipment for each user terminal.
The user terminal of scheduling is ranked up by described first network equipment according to user's Mean Speed is descending.
Described first network equipment selects the maximum user of speed and second network equipment thereof, and the transmitting power keeping other second network equipments is constant, and the second network equipment transmitting power of maximum for speed user terminal reduces making to ensure that its Mean Speed is more than Rth。
Relatively whether the transmitting power sum of all second network equipments reduces, if not reducing, then finishing iteration power allocation procedure.
Visible, adopt such scheme, after just can getting the statistic channel information of user terminal, pre-conditioned and second pre-conditioned combine according to first, choosing second network equipment of correspondence for user terminal and distribute transmitting power, the transmitting power sum of whole second network equipments in control current system is lower than the second predetermined threshold value；So, distribute with power by utilizing statistic channel information to be scheduling, while the transfer rate that ensure that between user terminal and second network equipment, reduce the transmitting power of second network equipment as far as possible, thus, improve system-power efficiency.
If module integrated described in the embodiment of the present invention is using the form realization of software function module and as independent production marketing or use, it is also possible to be stored in a computer read/write memory medium.Based on such understanding, the part that prior art is contributed by the technical scheme of the embodiment of the present invention substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server or the network equipment etc.) performs all or part of of method described in each embodiment of the present invention.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD.So, the embodiment of the present invention is not restricted to the combination of any specific hardware and software.
Accordingly, the embodiment of the present invention also provides for a kind of computer-readable storage medium, and wherein storage has computer program, and this computer program is for performing the method that the embodiment of the present invention provides.
The above, be only presently preferred embodiments of the present invention, is not intended to limit protection scope of the present invention.
Claims (13)
1. a dispatching method, is applied to first network equipment, it is characterised in that described method includes:
Getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；
Statistic channel information according to described M user terminal and first pre-conditioned, chooses M second network equipment respectively for described M user terminal；
Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；
Generate M dispatch command respectively for described M two network equipments, send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
2. method according to claim 1, it is characterised in that pre-conditioned according to the statistic channel information of described M user terminal and first, chooses M second network equipment respectively for described M user terminal, including:
User terminal is selected successively as first user terminal from described M user terminal；
The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose the transfer rate second network equipment more than the first predetermined threshold value for described first user terminal.
3. method according to claim 1, it is characterised in that described pre-conditioned according to second, determines described M second network equipment down-link transmitting power for user terminal respectively, including:
Obtain the transfer rate of M user terminal, according to described transfer rate, described M user terminal is ranked up；
From remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal；
Calculate the transmitting power sum obtaining whole described M second network equipment as the second predetermined threshold value；
Down-link transmitting power between described second network equipment corresponding for first user terminal and described first user terminal is adjusted so that described second network equipment utilizes the down-link transmitting power after adjusting to ensure that the transfer rate between described second network equipment and described user terminal is be more than or equal to the first predetermined threshold value；
Calculate the transmitting power sum of whole described M second network equipment as the transmitting power sum after adjusting；
Judge that whether the transmitting power sum after described adjustment is less than described second predetermined threshold value, if less than, then described first network equipment is set to the adjusted network equipment, return from remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal.
4. a dispatching method, is applied to second network equipment, it is characterised in that described method includes:
Get the statistic channel information of at least one user terminal；
Send the statistic channel information of at least one user terminal described to first network equipment；
Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
5. method according to claim 4, it is characterised in that described in get the statistic channel information of at least one user terminal, including:
Get the detectable signal that at least one user terminal is sent；
The statistic channel information of at least one user terminal described is determined according to described detectable signal.
6. method according to claim 5, it is characterised in that the described statistic channel information determining at least one user terminal described according to described detectable signal, including:
Described detectable signal is utilized to calculate the uplink channel parameters obtaining at least one user terminal described；
The uplink channel parameters utilizing at least one user terminal described calculates the up-link statistic channel information and described downlink statistic channel information that obtain at least one user terminal described；
Utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.
7. a network equipment, it is characterised in that the described network equipment includes:
First communication unit, for getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；Send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal
Scheduling unit, pre-conditioned for the statistic channel information according to described M user terminal and first, choose M second network equipment respectively for described M user terminal；Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；M dispatch command is generated respectively for described M two network equipments.
8. the network equipment according to claim 7, it is characterised in that
Described scheduling unit, specifically for selecting user terminal successively as first user terminal from described M user terminal；The transfer rate in statistic channel information according to described first user terminal and greedy dispatching algorithm, choose the transfer rate second network equipment more than the first predetermined threshold value for described first user terminal.
9. the network equipment according to claim 7, it is characterised in that described scheduling unit, specifically for obtaining the transfer rate of M user terminal, is ranked up described M user terminal according to described transfer rate；From remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal；Calculate the transmitting power sum obtaining whole described M second network equipment as the second predetermined threshold value；Down-link transmitting power between described second network equipment corresponding for first user terminal and described first user terminal is adjusted so that described second network equipment utilizes the down-link transmitting power after adjusting to ensure that the transfer rate between described second network equipment and described user terminal is be more than or equal to the first predetermined threshold value；Calculate the transmitting power sum of whole described M second network equipment as the transmitting power sum after adjusting；Judge that whether the transmitting power sum after described adjustment is less than described second predetermined threshold value, if less than, then described first network equipment is set to the adjusted network equipment, return from remaining whole unadjusted user terminals, choose the maximum user terminal of described transfer rate as first user terminal.
10. a network equipment, it is characterised in that the described network equipment includes:
Second communication unit, for sending the statistic channel information of at least one user terminal described to first network equipment；Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal；
Computing unit, for getting the statistic channel information of at least one user terminal.
11. the network equipment according to claim 10, it is characterised in that
Described second communication unit, is additionally operable to get the detectable signal that at least one user terminal is sent；
Accordingly, described computing unit, it is additionally operable to determine the statistic channel information of at least one user terminal described according to described detectable signal.
12. the network equipment according to claim 11, it is characterised in that
Described computing unit, the uplink channel parameters obtaining at least one user terminal described specifically for utilizing described detectable signal to calculate；The uplink channel parameters utilizing at least one user terminal described calculates the up-link statistic channel information and described downlink statistic channel information that obtain at least one user terminal described；Utilize the up-link statistic channel information of at least one user terminal described and described downlink statistic channel information, it is determined that at least one user terminal described is respectively directed to the statistic channel information of second network equipment of correspondence.
13. a dispatching patcher, it is characterised in that described system includes:
First network equipment, for getting the statistic channel information of M the user terminal that at least one second network equipment is sent, M is the positive integer be more than or equal to 1；Statistic channel information according to described M user terminal and first pre-conditioned, chooses M second network equipment respectively for described M user terminal；Pre-conditioned according to second, determine described M second network equipment down-link transmitting power for user terminal respectively, described transfer rate between second pre-conditioned characterization control each second network equipment and described user terminal is be more than or equal to while the first predetermined threshold value, and the down-link transmitting power summation of described M second network equipment is less than the second predetermined threshold value；Generate M dispatch command respectively for described M two network equipments, send described M dispatch command, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal；
Second network equipment, for getting the statistic channel information of at least one user terminal；Send the statistic channel information of at least one user terminal described to first network equipment；Receive the dispatch command that described first network equipment is sent, described dispatch command carries the information of user terminal corresponding to described second network equipment of instruction and the down-link transmitting power for described user terminal.
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