CN103826306A - Gaming-based downlink dynamic interference coordination method in high-density wireless network - Google Patents
Gaming-based downlink dynamic interference coordination method in high-density wireless network Download PDFInfo
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Abstract
The invention relates to a gaming-based downlink dynamic interference coordination method in a high-density wireless network. All remote radio heads (RRH) are processed by modeling to become participants in a downlink transmission resource game, and during the process of participating of gaming and competition by all participants, parts of remote radio heads select mutual cooperation to improve statuses in the system. Because different game competition strategies are used among all the remote radio heads, all participants are divided into different alliances; and members in the alliances use specific technical cooperation ways like time division multiple access, interference alignment, and beam forming, and interferences between alliances are eliminated. However, different alliances do not cooperate with each other and thus the remote radio heads of other alliances still cause interferences on the remote radio heads not belonging to the same alliances, so that the alliance model is a mode division-based alliance game. According to the invention, information interaction among all participants is greatly simplified; and the user service quality is not influenced. Interferences from other members in the alliances can be eliminated; and thus the system spectrum efficiency is improved.
Description
Technical field
The present invention relates to a kind of radio communication new technology, exactly, relate to the descending dynamic interference coordination method of a kind of highly dense wireless network for cloud wireless access network based on game, belong to the technical field of wireless isomer communication and wireless network.
Background technology
In recent years, the flow of mobile Internet is explosive growth, no matter be to the network coverage or to spectrum efficiency, has all proposed new increased requirement.By changing the network topology of legacy cellular shape, in macrocell coverage area, dispose the chemical shift point base stations (as picocell, Home eNodeB, small-cell etc.) of little covering, low-power consumption, effectively the spectrum efficiency of elevator system, improve community cover, and then meet the user's high speed business demand under focus scene, therefore form heterogeneous hierarchical wireless network.
But along with a large amount of deployment of focus base station, form highly dense wireless network, and operator faces new challenges again: one, and a large amount of isomery websites of disposing, make the mutual interference between each website become the bottleneck that restriction spectrum effect further promotes; Its two, the various base station of number causes the cost of construction, O&M and the upgrading of operator sharply to increase; Its three, the tidal effect of traffic demand, causes the disposal ability of most of base station not to be fully used, and causes the waste of resource.Above-mentioned reason causes operator's slow income growth.In order to keep lasting profitability and long-term traffic growth, operator needs the wireless service presentation mode of a kind of low cost, green badly, and therefore, a kind of network system architecture based on cloud wireless access network has been subjected to increasing scientific and technical personnel's concern.
Referring to Fig. 1, introduce typical cloud wireless access network C-RAN(cloud radio access network) three parts: the Base-Band Processing pond BBU(baseband unit that is positioned at high in the clouds), be deployed in the remote radio unit (RRU) RRH(remote radio head of far-end) and be positioned in the middle of optical transfer network.Base-Band Processing pond is made up of high-performance processor, focuses on the data message of wireless access end, and system resource is managed concentratedly by real-time virtual technology and powerful disposal ability.Remote radio unit (RRU) is used for providing effective covering, but it is only for the wireless signal of transmitting/receiving wireless incoming end, do not process, therefore can effectively reduce assets expenses CAPEX(Capital Expenditure) and operation cost OPEX(Operating Expense).Optical transfer network is responsible for large capacity, low time delay link connection remote radio unit (RRU) and Base-Band Processing pond.The Base-Band Processing pond in high in the clouds is responsible for control signal to carry out and focus on and partition system resources, also adopts real-time virtual technology to carry out distributing based on the adaptive resource of load, has guaranteed the efficient utilization to processing resource.
On the other hand, alliance's game is the effective tool of collaborative problem between a kind of participant of research, and each participant strengthens the status in system by the mode that forms alliance, the larger income when user in alliance can obtain than each user's independent action by cooperation.Therefore utilizing the collaborative problem in alliance's game modeling cordless communication network is a kind of reasonably selection.
For effectively managing interference, the lifting spectrum efficiency in highly dense wireless network, researcher has done large quantity research, and has proposed multiple interference coordination schemes.But existing highly dense wireless network interference coordination schemes generally adopts distributed implementation method, between node, can not carry out effectively and information sharing timely, the interaction time delay of information and processing delay become and limit the practical important bottleneck of these schemes.On the other hand, for the multipoint cooperative CoMP(Coordinated Multi-Point of wireless network) technical research is also very not enough, and how between highly dense wireless network stations, effectively to cooperate and to determine that what kind of cooperative mechanism all needs to be studied.
The characteristic of cloud wireless access network is centralized processing, especially aspect interference coordination technique, on the one hand, cooperative processing technology can realize the antenna cooperative on multiple different physical locations by usage space channel information, thereby Radio Resource is carried out to combined dispatching, effectively reduce and disturb; On the other hand, C-RAN high speed optical transfer network has guaranteed the low time delay of information interaction and data processing, avoids affecting user and experiences.
Summary of the invention
In view of this, the object of this invention is to provide the descending dynamic interference coordination method of a kind of highly dense wireless network for cloud wireless access network C-RAN based on game, in the method, the information of each remote radio unit (RRU) is shared at Base-Band Processing pond end, has greatly simplified each participant's information interaction complexity; Meanwhile, low delay optical transfer network can guarantee QoS of customer unaffected.After the information of all remote radio unit (RRU)s of centralized collection, Base-Band Processing pond is according to the coalition formation condition of setting, can dynamically remote radio unit (RRU) be divided into different alliances, radio frequency unit in same alliance takes setting means to cooperate, eliminate the interference of other members in alliance, and then improve system spectral efficiency.
In order to achieve the above object, the invention provides the descending dynamic interference coordination method based on game in a kind of highly dense wireless network, it is characterized in that: each remote radio unit (RRU) under a Base-Band Processing pond management is modeled as to the participant in the game of downlink transfer resource, each participant is in the process of participation game and competition, and remote radio unit (RRU) RRH can select to cooperate with each other to promote its status in system; And because the each remote radio unit (RRU) under a Base-Band Processing pond management adopts different game competitive strategies, make all participants be divided into different alliances, in alliance, member adopts the particular technology approach to cooperation that comprises time division multiple access, disturbs alignment and wave beam forming, and eliminates in alliance and disturb; But also uncooperative between different alliances, therefore the remote radio unit (RRU) of any other alliance still causes interference to the remote radio unit (RRU) in Fei Ben alliance, this alliance model is alliance's game of zoned format.
The innovation advantage of the descending dynamic interference coordination method based on game in heterogeneous network of the present invention is:
Dynamic downlink interference collaboration technology from the angle analysis network of alliance's game first, especially be directed to the interference coordination technique of C-RAN architecture network, the invention provides mode that a kind of network node forms an alliance by cooperation and carry out the technology of interference coordination, the method is modeled as high-density wireless network node the participant of game, select spectrum effect as game target, network node is cooperated by the mode of forming an alliance.The present invention also introduces alliance's betting model, and has introduced a kind of specific algorithm flow process that forms alliance.
The embodiment of the inventive method shows: its entire system performance is obviously better than the entire system performance under traditional non-cooperation, and along with the lifting of remote radio unit (RRU) quantity, performance advantage of the present invention is obvious gradually.Therefore, the present invention has good popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is application scenarios of the present invention: the schematic diagram of the descending interference of high-density wireless network of C-RAN framework.
Fig. 2 is the application scenarios of the inventive method embodiment: the high-density wireless network of C-RAN framework is formed an alliance and disturbed the schematic diagram of elimination situation.
Fig. 3 is the descending dynamic interference coordination method operating procedure flow chart based on alliance's game in the highly dense wireless network of C-RAN framework of the present invention.
Fig. 4 is the inventive method: in the highly dense wireless network of C-RAN framework, in alliance, time interval resource is divided schematic diagram.
Fig. 5 is the operating procedure flow chart of coalition formation algorithm in the highly dense wireless network of C-RAN framework of the present invention.
Fig. 6 is the inventive method embodiment and the system total revenue comparison diagram of remote radio unit (RRU) under non-approach to cooperation.
Fig. 7 is the inventive method embodiment and the radio frequency unit average yield comparison diagram of remote radio unit (RRU) under non-approach to cooperation.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Descending dynamic interference coordination method based on game in the highly dense wireless network of C-RAN framework of the present invention, for suppressing the co-channel interference between each remote radio unit (RRU).The method is that each remote radio unit (RRU) under a just Base-Band Processing pond management is modeled as the participant in the game of downlink transfer resource, each participant is in the process of participation game and competition, and remote radio unit (RRU) can select to cooperate with each other to promote its status in system; And because the each remote radio unit (RRU) under a Base-Band Processing pond management adopts different game competitive strategies, make all participants be divided into different alliances, in alliance, member adopts the approach to cooperation that comprises time division multiple access, disturbs the particular technology of alignment and wave beam forming to eliminate interference in alliance.Although but in same alliance, between member, adopt approach to cooperation, since also uncooperative between different alliance, therefore the remote radio unit (RRU) of any other alliance still causes interference to the remote radio unit (RRU) in Fei Ben alliance.This external correlation determines that alliance model of the present invention is alliance's game of zoned format.This alliance model is alliance's game of zoned format.
While interference in the approach to cooperation elimination alliance of the inventive method employing tdma, antenna amount to each radio frequency unit and user's antenna amount are not done requirement, and in each time slot alliance all members' remote radio unit (RRU) service dispatch user simultaneously, increase useful signal by increasing signal copy, thereby improve the letter interference ratio SINR of receiver.
If while interference in the approach to cooperation elimination alliance of employing interference alignment or wave beam forming technology, radio frequency unit should configure many antennas, but not requirement of the antenna amount of receiver.In embodiment below, set forth operation principle of the present invention as an example of time division multiple access example.
Referring to Fig. 2, introduce the application scenarios of the inventive method one embodiment: in network C-RAN framework and under the management of same Base-Band Processing pond, remote radio unit (RRU) set
in each remote radio unit (RRU) all use identical resource, in formula, the sequence number that natural number subscript i is remote radio unit (RRU), its maximum number, remote radio unit (RRU) adds up to N.Each remote radio unit (RRU) can be served the user of the remote radio unit (RRU) RRH of multiple random distribution simultaneously, and the different subchannels of each CU under each remote radio unit (RRU), every sub-channels can only be distributed to a user simultaneously and use under a remote radio unit (RRU).
Referring to Fig. 3, introduce three concrete operation steps of the inventive method:
Step 1: the starting stage of each resource allocation cycle, management lower all remote radio unit (RRU)s in Base-Band Processing pond are non-approach to cooperation, i.e. each remote radio unit (RRU) formation only has himself member's alliance.
Step 2: the field feedback of all remote radio unit (RRU)s under its management is collected in Base-Band Processing pond, takes the coalition formation algorithm of setting, and remote radio unit (RRU) is divided into different alliance (Figure 2 shows that a kind of possible alliance's result)..
Embodiments of the invention are to set forth coalition formation algorithm as an example of time division multiple access way example.But the thought that the remote radio unit (RRU) in the present invention is formed an alliance is not only confined to time division multiple access way, can use any existing or be about to occur interference cancellation techniques.Fig. 4 has shown the schematic diagram that carries out resource division on time slot.
For adapting to remote radio unit (RRU) user's mobility, the alliance's dividing mode between remote radio unit (RRU) is cycle variation, coalition structure is periodically-varied.Therefore,, in this step 2, following content of operation is carried out in Base-Band Processing pond dynamically, periodically:
(21) radio frequency unit that remote radio unit (RRU) user is its service feeds back this user's the current channel information of service radio frequency unit and the current information that this user is caused to other radio frequency units of interference: wherein, this user's the current channel information of service radio frequency unit comprises: channel gain, the user Signal to Interference plus Noise Ratio SINR(signal to interference and noise ratio on different resource of this service radio frequency unit on different resource) and the transmitting power of this service radio frequency unit on different resource etc.Currently cause the information of other radio frequency units of interference to comprise to this user: on different resource interference strength on different resource of other radio frequency units and this user's channel gain, other radio frequency units, active user is caused to the ID set of other radio frequency units of interference etc.
(22) all field feedbacks in its control range of Base-Band Processing pond centralized collection: remote radio unit (RRU) user's feedback information transfers to Base-Band Processing pond via low time delay optical transfer network, the virtual processor that each remote radio unit (RRU) is corresponding is shared these channel informations, for the cooperation of being convenient to hold consultation between these remote radio unit (RRU)s.
(23) because of remote radio unit (RRU) do not have processing capacity or processing capacity limited, therefore concentrated alone coalition formation algorithm by Base-Band Processing pond, do not need each radio frequency unit mutual each other by traditional base station interface, reduce the power consumption of processing delay and exchange message.Base-Band Processing pond utilizes the information of sharing and according to setting criterion (embodiment of the present invention is defection ordre criterion), remote radio unit (RRU) is divided into different alliances.In addition, be noted that the suffered interference strength of part do not participate in any other alliance compared with low remote radio unit (RRU) because its discontented foot-shape becomes the criterion of alliance, still maintain the alliance that only has self single member; Namely forming alliance can not be for certain or some remote radio unit (RRU)s be bring extra returns time, and these remote radio unit (RRU)s are just selected not and other any remote radio unit (RRU) cooperations.
It is that each remote radio unit (RRU) is divided when the different alliance that the inventive method embodiment adopts defection order judgment criterion, and the remote radio unit (RRU) that make to be polled to adds and meets following three conditions after new alliance:
The user's income being polled to is greater than its user's income in old alliance,
The all user's total revenues of new alliance are greater than the user income sum of all members in the time of non-cooperation in this alliance,
Average member's income of new alliance is greater than Gai Xin alliance in average member's income of accepting before this remote radio unit (RRU).Wherein, all user's total revenues of alliance are the user's income sum after all allied members form an alliance, and all user's total revenues that average member's income of alliance is alliance are divided by the business of allied member's number.
In this step, the coalition formation algorithm that time division multiple access way is carried out in Base-Band Processing pond comprises following content of operation:
(a) the each remote radio unit (RRU) A under its management of Base-Band Processing pond traversal poll
i, in formula, natural number subscript i is remote radio unit (RRU) sequence number.
(b) Base-Band Processing pond is the current remote radio unit (RRU) A being polled to
idetection comprises existing alliance framework
each S of alliance wherein
kwith the S of this alliance
kin each information about firms, wherein,
for the set of alliance, natural number k is alliance's sequence number, and its maximum, total number of current alliance is K; In described alliance, each information about firms comprises: each member of alliance and the income separately in the time of non-cooperation thereof, average member's income of alliance, each member are to the gain of the subscriber channel under the current remote radio unit (RRU) being polled to.
(c) whether the alliance that current poll is checked in Base-Band Processing pond is in the historical record variable H (i) of the remote radio unit (RRU) of current poll, and H (i) has added the set of the alliance traveling through for i remote radio unit (RRU) of record.
If the alliance of current poll has been present in the historical record H (i) of remote radio unit (RRU) of current poll, do not do any processing, directly start the next S of alliance of poll
k+1, return and carry out rapid (c);
If the alliance of current poll does not exist in the historical record H (i) of remote radio unit (RRU) of current poll, detect again and judge whether whether the remote radio unit (RRU) of current poll meets the condition of the alliance that joins current poll, meet defection order criterion.
Now, if the remote radio unit (RRU) of this poll does not meet defection order criterion, do not do any processing, directly start the next S of alliance of poll
k+1, return and carry out rapid (c).
If the remote radio unit (RRU) of this poll meets defection order criterion, the new income of bringing by the alliance of poll and for the remote radio unit (RRU) of current poll is all stored in the alternative switching collection Θ of the remote radio unit (RRU) of current poll; In formula, the set of the alliance that the remote radio unit (RRU) that Θ is current poll likely adds.
In the time of execution step (c), certain remote radio unit (RRU) A
iin the time of certain poll, select to join after an alliance, may be because of follow-up poll time, add other remote radio unit (RRU)s, make this alliance no longer to A
iwhile bringing optimum performance, just select to leave this alliance, thereby cause alliance system structure to occur periodic vibration and unstable.For this reason, for each remote radio unit (RRU) distributes a historical record variable, for guaranteeing can not occur the periodicity concussion of coalition structure: each remote radio unit (RRU) is selected to add after certain existing alliance, just the information about firms of this alliance is all joined in the historical record variable of this remote radio unit (RRU); In the time that this remote radio unit (RRU) continues other existing alliances of poll, whether the alliance that first checks this poll belongs to its historical record: for the alliance that belongs to historical record, illustrate that this remote radio unit (RRU) added in the past Guo Gai alliance but exited afterwards, directly skip this alliance, the next alliance of poll; Guarantee that by this each cycle can reach a stable coalition structure while execution.
(d) whether the remote radio unit (RRU) that judges current poll has not also traveled through existing coalition structure, if, continue the next alliance of traversal, return to execution step (c), until current poll remote radio unit (RRU) has traveled through all alliances in existing coalition structure;
(e) detect and judge whether the alternative switching collection Θ of the remote radio unit (RRU) of current poll is empty, and if so, existing coalition structure is not done to change, and returns to execution step (b), starts the next remote radio unit (RRU) of poll; If not, Base-Band Processing pond joins the remote radio unit (RRU) of current poll in alternative switching collection Θ to it and brings user's income and alliance's average user income both in maximum alliance, and Base-Band Processing pond is upgraded existing coalition structure and is simultaneously
and by this remote radio unit (RRU) select two kinds of incomes adding all maximum alliance information also add in the historical record H (i) of remote radio unit (RRU) of current poll.
(f) judged whether to travel through poll whole remote radio unit (RRU)s, if not, the next remote radio unit (RRU) A of poll
i+1, return to execution step (b); If so, carry out subsequent step (g).
(g) Base-Band Processing pond checks and this time completes after the whole radio frequency units of traversal poll, whether current existing coalition structure changes with respect to the coalition structure that starts to travel through before poll, if, the division that alliance is described is unstable, continue again to travel through all remote radio unit (RRU)s of poll, return to execution step (a); If not, illustrate that alliance's division has reached stable, this algorithm is finished.Fig. 2 has shown a kind of possible alliance's result.
Step 3: under controlling in Base-Band Processing pond, in each alliance, member takes the mode that comprises time division multiple access, disturbs alignment and wave beam forming to eliminate interference in alliance, carries out transfer of data.
Although the remote radio unit (RRU) method of forming an alliance can be used multiple interference cancellation techniques, because interference cancellation different in alliance determines the different account forms of allied member's income, and then affect remote radio unit (RRU) and whether coalize; The coalition structure that namely coalition formation algorithm forms depends on the interference cancellation that step 3 adopts in alliance.
Finally, above-mentioned each step is periodically carried out in Base-Band Processing pond, to adapt to the mobility of user under remote radio unit (RRU).
The present invention has carried out the repeatedly emulation of embodiment and has implemented test, to verify the superiority of the inventive method, and simulation criteria result of the present invention and traditional noncooperative systematic function is contrasted.Fig. 6 is the inventive method and the contrast of traditional non-cooperation method in entire system performance; Fig. 7 is the present invention and the contrast of traditional non-cooperation method in radio frequency unit average yield.
Shown in Figure 6, use after the inventive method, entire system performance is obviously better than the entire system performance under traditional non-cooperation, and along with the lifting of remote radio unit (RRU) quantity, the performance advantage that the present invention embodies is obvious gradually.Meanwhile, along with the increase of remote radio unit (RRU) number, system interference is limited, no matter be the inventive method or traditional non-cooperation method, entire system performance growth trend is slow, but the present invention is obviously better than traditional non-cooperation method all the time.
Shown in Figure 7, radio frequency unit average behavior of the present invention is better than traditional non-cooperation method.Although radio frequency unit quantity increases to cause disturbing and increases and average behavior reduction, the present invention is better than traditional non-cooperation method all the time, and along with the increase of radio frequency unit quantity, performance advantage of the present invention is more obvious.
Claims (9)
1. the descending dynamic interference coordination method based on game in a highly dense wireless network, it is characterized in that: each remote radio unit (RRU) under a Base-Band Processing pond management is modeled as to the participant in the game of downlink transfer resource, each participant is in the process of participation game and competition, and remote radio unit (RRU) RRH can select to cooperate with each other to promote its status in system; And because the each remote radio unit (RRU) under a Base-Band Processing pond management adopts different game competitive strategies, make all participants be divided into different alliances, in alliance, member adopts the particular technology approach to cooperation that comprises time division multiple access, disturbs alignment and wave beam forming, and eliminates in alliance and disturb; But also uncooperative between different alliances, therefore the remote radio unit (RRU) of any other alliance still causes interference to the remote radio unit (RRU) in Fei Ben alliance, this alliance model is alliance's game of zoned format.
2. method according to claim 1, it is characterized in that: while interference in the approach to cooperation elimination alliance of described method employing tdma, antenna amount to each radio frequency unit and user's antenna amount are not done requirement, and all members' remote radio unit (RRU) service dispatch user simultaneously in each time slot alliance, increase useful signal by increasing signal copy, thereby improve the letter interference ratio SINR of receiver; And adopt while disturbing alignment or the approach to cooperation of wave beam forming technology to eliminate in alliance interference, radio frequency unit should configure many antennas, but the not requirement of the antenna amount of receiver.
3. method according to claim 1, is characterized in that: described method is applied in the highly dense wireless network of cloud wireless access network C-RAN framework, the remote radio unit (RRU) set under the management of a described Base-Band Processing pond
in each remote radio unit (RRU) all use identical resource, each remote radio unit (RRU) can be served the subscriber equipment of the remote radio unit (RRU) of multiple random distribution simultaneously, and the different subchannel of each CU under each remote radio unit (RRU), every sub-channels can only be distributed to a user simultaneously and use under a remote radio unit (RRU); In formula, natural number subscript i and N are respectively the sequence number of remote radio unit (RRU) and maximum number thereof, the i.e. sum of remote radio unit (RRU).
4. method according to claim 1, is characterized in that: described method comprises following operating procedure:
(1) starting stage of each resource allocation cycle, management lower all remote radio unit (RRU)s in Base-Band Processing pond are non-approach to cooperation, i.e. each remote radio unit (RRU) formation only has himself member's alliance;
(2) field feedback of all remote radio unit (RRU)s under its management is collected in Base-Band Processing pond, takes the coalition formation algorithm of setting, and remote radio unit (RRU) is divided into different alliances;
(3), under controlling in Base-Band Processing pond, in each alliance, member takes the mode that comprises time division multiple access, disturbs alignment and wave beam forming to eliminate interference in alliance, carries out transfer of data.
5. method according to claim 4, is characterized in that: for adapting to remote radio unit (RRU) user's mobility, the alliance's dividing mode between remote radio unit (RRU) is cycle variation, coalition structure is periodically-varied; Therefore in described step (2), following content of operation is carried out in Base-Band Processing pond dynamically, periodically:
(21) radio frequency unit that remote radio unit (RRU) user is its service feeds back this user's the current channel information of service radio frequency unit and the current information that this user is caused to other radio frequency units of interference: wherein, this user's the current channel information of service radio frequency unit comprises: channel gain, user Signal to Interference plus Noise Ratio SINR and this service radio frequency unit transmitting power on different resource on different resource of this service radio frequency unit on different resource; Currently cause the information of other radio frequency units of interference to comprise to this user: on different resource interference strength on different resource of other radio frequency units and this user's channel gain, other radio frequency units, active user is caused to the ID set of other radio frequency units of interference;
(22) all field feedbacks in its control range of Base-Band Processing pond centralized collection: remote radio unit (RRU) user's feedback information transfers to Base-Band Processing pond via low time delay optical transfer network, the virtual processor that each remote radio unit (RRU) is corresponding is shared these channel informations, for the cooperation of being convenient to hold consultation between these remote radio unit (RRU)s;
(23) coalition formation algorithm has been concentrated in Base-Band Processing pond, do not need each remote radio unit (RRU) mutual each other by traditional base station interface, reduce the power consumption of processing delay and exchange message: Base-Band Processing pond utilizes the information of sharing and according to setting criterion, remote radio unit (RRU) is divided into different alliances, and the suffered interference strength of part is not participated in any other alliance compared with low remote radio unit (RRU) because its discontented foot-shape becomes the criterion of alliance, still maintain the alliance that only has self single member; Namely forming alliance can not be for certain or some remote radio unit (RRU)s be bring extra returns time, and these remote radio unit (RRU)s are just selected not and other any remote radio unit (RRU) cooperations.
6. method according to claim 4, the remote radio unit (RRU) method of forming an alliance it is characterized in that: although can be used any interference cancellation techniques, but because interference cancellation different in alliance determines the different account forms of allied member's income, and then affect remote radio unit (RRU) and whether coalize; The coalition structure that namely coalition formation algorithm forms depends on the interference cancellation that step (3) adopts in alliance.
7. method according to claim 5, it is characterized in that: in described step (23), the setting criterion that remote radio unit (RRU) is divided into different alliances is defection order judgment criterion: each remote radio unit (RRU) is divided when the different alliance, after adding new alliance, the remote radio unit (RRU) that makes to be polled to meets following three conditions: make the user's income being polled to be greater than its user's income in old alliance, the all user's total revenues of new alliance are greater than the user income sum of all members in the time of non-cooperation in this alliance, and average member's income of new alliance is greater than Gai Xin alliance in average member's income of accepting before this remote radio unit (RRU), wherein, all user's total revenues of alliance are the user's income sum after all allied members form an alliance, and all user's total revenues that average member's income of alliance is alliance are divided by the business of allied member's number.
8. method according to claim 5, is characterized in that: in described step (23), the coalition formation algorithm that time division multiple access way is carried out in Base-Band Processing pond comprises following content of operation:
(a) the each remote radio unit (RRU) A under its management of Base-Band Processing pond traversal poll
i, in formula, natural number subscript i is remote radio unit (RRU) sequence number;
(b) Base-Band Processing pond is the current remote radio unit (RRU) A being polled to
idetection comprises existing alliance framework
each S of alliance wherein
kwith the S of this alliance
kin each information about firms, wherein,
for the set of alliance, natural number k is alliance's sequence number, and its maximum, total number of current alliance is K; In described alliance, each information about firms comprises: each member of alliance and the income separately in the time of non-cooperation thereof, average member's income of alliance, each member are to the gain of the subscriber channel under the current remote radio unit (RRU) being polled to;
(c) whether the alliance that current poll is checked in Base-Band Processing pond is in the historical record variable H (i) of the remote radio unit (RRU) of current poll, and H (i) has added the set of the alliance traveling through for i remote radio unit (RRU) of record;
If the alliance of current poll has been present in the historical record H (i) of remote radio unit (RRU) of current poll, do not do any processing, directly start the next S of alliance of poll
k+1, return and carry out rapid (c);
If the alliance of current poll does not exist in the historical record H (i) of remote radio unit (RRU) of current poll, detect again and judge whether whether the remote radio unit (RRU) of current poll meets the condition of the alliance that joins current poll, meet defection order criterion;
Now, if the remote radio unit (RRU) of this poll does not meet defection order criterion, do not do any processing, directly start the next S of alliance of poll
k+1, return and carry out rapid (c);
If the remote radio unit (RRU) of this poll meets defection order criterion, the new income of bringing by the alliance of this poll and for the remote radio unit (RRU) of current poll is all stored in the alternative switching collection Θ of the remote radio unit (RRU) of current poll; In formula, alliance's set that the remote radio unit (RRU) that Θ is current poll likely adds;
(d) whether the remote radio unit (RRU) that judges current poll has not also traveled through existing coalition structure, if, continue the next alliance of traversal, return to execution step (c), until current poll remote radio unit (RRU) has traveled through all alliances in existing coalition structure;
(e) detect and judge whether the alternative switching collection Θ of the remote radio unit (RRU) of current poll is empty, and if so, existing coalition structure is not done to change, and returns to execution step (b), starts the next remote radio unit (RRU) of poll; If not, Base-Band Processing pond joins the remote radio unit (RRU) of current poll in alternative switching collection Θ to it and brings user's income and alliance's average user income both in maximum alliance, and Base-Band Processing pond is upgraded existing coalition structure and is simultaneously
and by this remote radio unit (RRU) select two kinds of incomes adding all maximum alliance information also add in the historical record H (i) of remote radio unit (RRU) of current poll;
(f) judged whether to travel through poll whole remote radio unit (RRU)s, if not, the next remote radio unit (RRU) A of poll
i+1, return to execution step (b); If so, carry out subsequent step (g);
(g) Base-Band Processing pond checks and this time completes after the whole radio frequency units of traversal poll, whether current existing coalition structure changes with respect to the coalition structure that starts to travel through before poll, if, the division that alliance is described is unstable, continue again to travel through all remote radio unit (RRU)s of poll, return to execution step (a); If not, illustrate that alliance's division has reached stable, this algorithm is finished.
9. method according to claim 1, is characterized in that: in described step (c), and certain remote radio unit (RRU) A
iin the time of certain poll, select to join after an alliance, may be because of follow-up poll time, add other remote radio unit (RRU)s, make this alliance no longer to A
iwhile bringing optimum performance, just select to leave this alliance, thereby cause alliance system structure to occur periodic vibration and unstable; For this reason, for each remote radio unit (RRU) distributes a historical record variable, for guaranteeing can not occur the periodicity concussion of coalition structure: each remote radio unit (RRU) is selected to add after certain existing alliance, just the information about firms of this alliance is all joined in the historical record variable of this remote radio unit (RRU); In the time that this remote radio unit (RRU) continues other existing alliances of poll, whether the alliance that first checks this poll belongs to its historical record: for the alliance that belongs to historical record, illustrate that this remote radio unit (RRU) added in the past Guo Gai alliance but exited afterwards, directly skip this alliance, the next alliance of poll; Guarantee that by this each cycle can reach a stable coalition structure while execution.
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