CN103826306B - A kind of descending dynamic interference coordination method in highly dense set network based on game - Google Patents
A kind of descending dynamic interference coordination method in highly dense set network based on game Download PDFInfo
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Abstract
A kind of descending dynamic interference coordination method in highly dense set network based on game, each remote radio unit (RRU) is modeled as into the participant in downlink transfer resource game, in game and competition process is participated in, segment distal radio frequency unit selects to cooperate with each other to lift its status in systems each participant；Because which adopts different game competitive strategies between each remote radio unit (RRU) so that all participants are divided into different alliances, in alliance, member adopts the particular technology approach to cooperation for including time division multiple acess, interference alignment and wave beam forming, and eliminates alliance's internal interference；But it is between different alliances and uncooperative, therefore the remote radio unit (RRU) of other alliances is still interfered to the remote radio unit (RRU) in non-alliance, i.e., the alliance model is the Game with Coalitions of zoned format.The inventive method greatly simplifies the information exchange of each participant, and it is unaffected to guarantee QoS of customer, and eliminates the interference of other members in alliance, and then improves system spectral efficiency.
Description
Technical field
The present invention relates to a kind of radio communication new technique, exactly, is related to a kind of for the highly dense of cloud wireless access network
Descending dynamic interference coordination method in set network based on game, the technology for belonging to wireless isomer communication and wireless network are led
Domain.
Background technology
In recent years, the flow of mobile Internet is in explosive growth, either to the network coverage still to spectrum efficiency,
It is proposed new increased requirement.By the network topology for changing conventional cellular, little covering is disposed in macrocell coverage area
Lid, the chemical shift point base stations (such as picocell, Home eNodeB, cell etc.) of low-power consumption, can effective lift system frequency
Spectrum efficiency, improve MPS process, and then meet the user's high speed business demand under focus scene, thus define heterogeneous hierarchical without
Gauze network.
However as a large amount of deployment of focus base station, highly dense set network is formed, operator faces new challenges again：
First, the isomery website of a large amount of deployment so that the mutual interference between each website becomes the bottleneck for limiting that spectrum effect is further lifted；Its
Two, the various base station of number causes the cost of construction, O＆M and the upgrading of operator to sharply increase；Third, the tide of traffic demand
Nighttide effect, causes the disposal ability of most of base station not to be fully used, causes the waste of resource.Above-mentioned reason causes fortune
Battalion's business's slow income growth.In order to keep lasting profitability and long-term business to increase, operator need badly a kind of low cost,
The wireless service provider formula of green, therefore, a kind of network system architecture based on cloud wireless access network has been subjected to more and more
The concern of many scientific and technical personnel.
Referring to Fig. 1, introduce typical cloud wireless access network C-RAN (cloud radio access network) three
Ingredient：Base-Band Processing pond BBU (baseband unit) positioned at high in the clouds, the remote radio unit (RRU) RRH for being deployed in distal end
(remote radio head) and positioned at middle optical transfer network.Base-Band Processing pond is made up of high-performance processor, by real-time
Virtual technology and powerful disposal ability focus on the data message at wireless access end, and carry out concentrate tube to system resource
Reason.Remote radio unit (RRU) is used to provide effectively covering, but which is only used for the wireless signal of transmitting/receiving wireless incoming end, does not do and locates
Reason, therefore, it is possible to effectively reduce assets expenses CAPEX (Capital Expenditure) and operation cost OPEX (Operating
Expense).Optical transfer network is responsible for Large Copacity, low time delay link connection remote radio unit (RRU) and Base-Band Processing pond.The base in high in the clouds
Tape handling pond is responsible for focusing on and partition system resources control signal execution, is also carried out based on negative using real-time virtual technology
The adaptive population of load, it is ensured that the efficient utilization to process resource.
On the other hand, Game with Coalitions is a kind of effective tool of collaborative problem between research participant, and each participant passes through
The mode of formation alliance strengthens status in systems, and the user in alliance can be obtained than each user's independent action by cooperation
When bigger income.The collaborative problem modeled in cordless communication network hence with Game with Coalitions is a kind of rational selection.
Effectively to manage the interference in highly dense set network, lifting spectrum efficiency, research worker has been done and has been ground in a large number
Study carefully, and propose multiple interference coordination schemes.But, existing highly dense set network interference coordination schemes are generally using distribution
Formula implementation, can not carry out effective and timely information sharing between node, the interaction time delay and processing delay of information become
Limit the practical important bottleneck of these schemes.On the other hand, for the multipoint cooperative CoMP (Coordinated of wireless network
Multi-Point) technical research is also very not enough, how effectively to be cooperated between highly dense wireless network stations and really
Fixed what kind of cooperative mechanism is all needed to be studied.
The characteristic of cloud wireless access network is centralized processing, especially in terms of interference coordination technique, on the one hand, collaborative to locate
Reason technology can realize multiple different antenna cooperatives physically using spatial channel information, so as to hold to Radio Resource
Row combined dispatching, effectively reduces interference；On the other hand, C-RAN high speeds optical transfer network ensure that information exchange and data processing
Low time delay, it is to avoid affect Consumer's Experience.
The content of the invention
In view of this, it is an object of the invention to provide a kind of highly dense set network for cloud wireless access network C-RAN
In descending dynamic interference coordination method based on game, in the method, the information of each remote radio unit (RRU) is at Base-Band Processing pond end
It is shared, greatly simplifies the information exchange complexity of each participant；Meanwhile, low latency optical transfer network ensure that user
Service quality is unaffected.After the information of all remote radio unit (RRU)s of centralized collection, alliance shape of the Base-Band Processing pond according to setting
Into condition, remote radio unit (RRU) can be divided into into different alliances dynamically, the radio frequency unit in same alliance takes setting
Mode is cooperated, and is eliminated the interference of other members in alliance, and then is improved system spectral efficiency.
In order to achieve the above object, the invention provides the lower Mobile state in a kind of highly dense set network based on game is done
Disturb coordination approach, it is characterised in that：Each remote radio unit (RRU) under one Base-Band Processing pond management is modeled as into downlink transfer
Participant in resource game, during game and competition is participated in, remote radio unit (RRU) RRH can be selected mutually each participant
Cooperate to lift its status in systems；And because each remote radio unit (RRU) under a Base-Band Processing pond management is using different
Game competitive strategy so that all participants are divided into different alliances, in alliance member using includes time division multiple acess, disturb
Alignment and the particular technology approach to cooperation of wave beam forming, and eliminate alliance's internal interference；But it is between different alliances and uncooperative, therefore appoint
What the remote radio unit (RRU) of his alliance is still interfered to the remote radio unit (RRU) in Fei Ben alliances, i.e., the alliance model is to draw
The Game with Coalitions of form-separating；Methods described includes operations described below step：
(1) starting stage of each resource allocation cycle, all remote radio unit (RRU)s under the management of Base-Band Processing pond are
Non- approach to cooperation, i.e. each remote radio unit (RRU) form the alliance for there was only its own member；
(2) field feedback of all remote radio unit (RRU)s under its management is collected in Base-Band Processing pond, takes setting
Remote radio unit (RRU) is divided into different alliances by coalition formation algorithm；And to adapt to the mobility of remote radio unit (RRU) user,
It is periodically-varied that alliance's dividing mode between remote radio unit (RRU) is mechanical periodicity, i.e. coalition structure；Therefore in the step,
Base-Band Processing pond dynamic, periodically execution operations described below content：
(21) remote radio unit (RRU) user is currently believed for the serving radio unit that its radio frequency unit for servicing feeds back the user
The information of road information and other radio frequency units that currently user is interfered：Wherein, the serving radio unit of the user is worked as
Front channel information includes：The channel gain of the serving radio unit on different resource, letter of the user on different resource is dry makes an uproar
Than SINR and the transmission power of the serving radio unit on different resource；Current other radio frequency lists that the user is interfered
The information of unit includes：On different resource other radio frequency units from the channel gain of the user, other radio frequency units in different moneys
The ID set of interference strength on source, other radio frequency units that active user is interfered；
(22) all field feedbacks in its span of control of Base-Band Processing pond centralized collection：Remote radio unit (RRU) user's
Feedback information is transmitted to Base-Band Processing pond via low time delay optical transfer network, and the corresponding virtual processor of each remote radio unit (RRU) is altogether
These channel informations are enjoyed, for being convenient for consulting cooperation between these remote radio unit (RRU)s；
(23) Base-Band Processing pond is concentrated and completes coalition formation algorithm, it is not necessary to which each remote radio unit (RRU) is connect by traditional base station
Mouth is interactively with each other, reduces processing delay and exchanges the power consumption of information：Base-Band Processing pond is using shared information and according to setting criterion
Remote radio unit (RRU) is divided into into different alliances, and the relatively low remote radio unit (RRU) of interference strength suffered by part is unsatisfactory for because of which
Form the criterion of alliance and do not participate in any other alliance, still maintain the alliance for there was only itself single member；Namely formed
When alliance can not bring extra returns for certain or some remote radio unit (RRU)s, these remote radio unit (RRU)s just select not with other
Any remote radio unit (RRU) cooperation；
(3) under the control of Base-Band Processing pond, in each alliance, member takes and assigns including time division multiple acess, interference alignment and wave beam
The mode of shape eliminates alliance's internal interference, carries out data transmission.
The innovation advantage of the descending dynamic interference coordination method in heterogeneous network of the present invention based on game is：
The dynamic downlink interference collaboration technology from the angle analysis network of Game with Coalitions first, especially in C-RAN framves
The interference coordination technique of network forming network, the invention provides a kind of network node carries out interference coordination by way of cooperation is formed an alliance
High-density wireless network node is modeled as the participant of game for technology, the method, selects spectrum effect as game target, network section
Point is cooperated by the mode of forming an alliance.The present invention also introduces Game with Coalitions model, and describes a kind of concrete calculation for forming alliance
Method flow process.
The embodiment of the inventive method shows：Its systematic entirety can be substantially better than the system under traditional non-cooperation
Overall performance, and with the lifting of remote radio unit (RRU) quantity, the performance advantage of the present invention is gradually obvious.Therefore, the present invention
With good popularizing application prospect.
Description of the drawings
Fig. 1 is application scenarios of the present invention：The schematic diagram of the high-density wireless network downstream interference of C-RAN frameworks.
Application scenarios of the Fig. 2 for the inventive method embodiment：The high-density wireless network of C-RAN frameworks is formed an alliance and is disturbed and disappears
Except the schematic diagram of situation.
Fig. 3 be C-RAN frameworks of the present invention highly dense set network in descending dynamic interference coordination based on Game with Coalitions
Method operating procedure flow chart.
Fig. 4 is the inventive method：In the highly dense set network of C-RAN frameworks, in alliance, time interval resource divides schematic diagram.
Fig. 5 be C-RAN frameworks of the present invention highly dense set network in coalition formation algorithm operating procedure flow chart.
Fig. 6 is the inventive method embodiment and system total revenue comparison diagram of the remote radio unit (RRU) under non-approach to cooperation.
Fig. 7 is the inventive method embodiment and radio frequency unit average yield pair of the remote radio unit (RRU) under non-approach to cooperation
Than figure.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, further is made to the present invention below in conjunction with the accompanying drawings
Detailed description.
Descending dynamic interference coordination method in the highly dense set network of C-RAN frameworks of the present invention based on game, is used for
Suppress the co-channel interference between each remote radio unit (RRU).The method is each far end radio frequency under just one Base-Band Processing pond management
Modelon Modeling is the participant in downlink transfer resource game, and each participant during game and competition is participated in, penetrate by distal end
Frequency unit can select to cooperate with each other to lift its status in systems；And because of each distal end under a Base-Band Processing pond management
Radio frequency unit adopts different game competitive strategies so that all participants are divided into different alliances, and in alliance, member adopts
Including time division multiple acess, interference alignment and wave beam forming particular technology approach to cooperation eliminating alliance's internal interference.But while
Approach to cooperation is adopted between member in same alliance, because between different alliances and uncooperative, therefore the distal end of any other alliance is penetrated
Frequency unit is still interfered to the remote radio unit (RRU) in Fei Ben alliances.This external dependency determines the alliance model of the present invention
It is the Game with Coalitions of zoned format.I.e. the alliance model is the Game with Coalitions of zoned format.
When the inventive method eliminates alliance's internal interference using the approach to cooperation of tdma, to each radio frequency unit
The antenna amount of antenna amount and user is not required, and in each time slot alliance all members remote radio unit (RRU) energy
Enough service dispatch users simultaneously, increase useful signal by increasing signal copy, so as to the letter for improving receiver disturbs ratio
SINR。
If eliminate alliance's internal interference using the approach to cooperation of interference alignment or beamforming technique, radio frequency unit should
Many antennas are configured, but the antenna amount of receiver is not required.In embodiment below, illustrate by taking time division multiple acess as an example
The operation principle of the present invention.
Referring to Fig. 2, the application scenarios of one embodiment of the inventive method are introduced：C-RAN frameworks and in same base band
In network under processing pond management, remote radio unit (RRU) setIn each remote radio unit (RRU)
Identical resource is used all, in formula, sequence number of natural number subscript i for remote radio unit (RRU), its maximum number, i.e. remote radio unit (RRU)
Sum is N.Each remote radio unit (RRU) can service the user of the remote radio unit (RRU) RRH of multiple random distributions simultaneously, and often
Each CU difference subchannel under individual remote radio unit (RRU), can only be same under a remote radio unit (RRU) per sub-channels
When distribute to user and use.
Referring to Fig. 3, three concrete operation steps of the inventive method are introduced：
Step 1：The starting stage of each resource allocation cycle, all remote radio unit (RRU)s under the management of Base-Band Processing pond are equal
The alliance for there was only its own member is formed for non-approach to cooperation, i.e. each remote radio unit (RRU).
Step 2：The field feedback of all remote radio unit (RRU)s under its management is collected in Base-Band Processing pond, takes setting
Coalition formation algorithm, remote radio unit (RRU) is divided into into different alliances (Fig. 2 show a kind of possible alliance's result)..
Embodiments of the invention are the elaboration coalition formation algorithms by taking time division multiple access way as an example.But, it is remote in the present invention
The end thought formed an alliance of radio frequency unit is not limited solely to time division multiple access way, it is possible to use it is any existing or will appear from it is dry
Disturb technology for eliminating.Fig. 4 illustrates the schematic diagram that resource division is carried out on time slot.
To adapt to the mobility of remote radio unit (RRU) user, the alliance's dividing mode between remote radio unit (RRU) is mechanical periodicity
, i.e. coalition structure be periodically-varied.Therefore, in the step 2, Base-Band Processing pond is dynamic, perform operations described below periodically
Content：
(21) remote radio unit (RRU) user is currently believed for the serving radio unit that its radio frequency unit for servicing feeds back the user
The information of road information and other radio frequency units that currently user is interfered：Wherein, the serving radio unit of the user is worked as
Front channel information includes：The channel gain of the serving radio unit on different resource, letter of the user on different resource is dry makes an uproar
Than SINR (signal to interference and noise ratio) and the serving radio unit on different resource
Transmission power etc..The information of current other radio frequency units interfered to the user includes：Other radio frequencies on different resource
Interference strength of the channel gain, other radio frequency units of unit and the user on different resource, active user is interfered
Other radio frequency units ID set etc..
(22) all field feedbacks in its span of control of Base-Band Processing pond centralized collection：Remote radio unit (RRU) user's
Feedback information is transmitted to Base-Band Processing pond via low time delay optical transfer network, and the corresponding virtual processor of each remote radio unit (RRU) is altogether
These channel informations are enjoyed, for being convenient for consulting cooperation between these remote radio unit (RRU)s.
(23) because remote radio unit (RRU) does not have processing function or processing function limited, therefore concentrated by Base-Band Processing pond alone
Into coalition formation algorithm, be not required to each radio frequency unit by traditional base station interface it is interactively with each other, reduce processing delay and exchange information
Power consumption.Base-Band Processing pond is using shared information and (embodiment of the present invention is defection ordre accurate according to setting criterion
Remote radio unit (RRU) is divided into into different alliances then).Additionally, it is noted that the relatively low distal end of interference strength suffered by part
Radio frequency unit does not participate in any other alliance because which is unsatisfactory for forming the criterion of alliance, still maintains there was only itself single member
Alliance；When namely formation alliance can not bring extra returns for certain or some remote radio unit (RRU)s, these far end radio frequencies
Unit just select not with other any remote radio unit (RRU) cooperations.
The inventive method embodiment using defection order judgment criterions be by each remote radio unit (RRU) divide in
During different alliances, the remote radio unit (RRU) being polled to be made to meet following three conditions after adding new alliance：
The user's income being polled to is more than its user's income in old alliance,
The all user's total revenues of new alliance are more than user income sum of all members in non-cooperation in the alliance,
Average member's income of new alliance is more than average member income of the new alliance before the remote radio unit (RRU) is received.
Wherein, all user's total revenues of alliance are the user's income sum after all allied members form an alliance, and the average member of alliance receives
Benefit is the business of all user's total revenues divided by allied member's number of alliance.
In the step, Base-Band Processing pond performs the coalition formation algorithm of time division multiple access way includes following operation content：
(a) Base-Band Processing pond traversal poll its management under each remote radio unit (RRU) Ai, in formula, natural number subscript i is
Remote radio unit (RRU) sequence number.
B () Base-Band Processing pond is the remote radio unit (RRU) A being currently polled toiDetection includes existing alliance's frameworkEach alliance S thereinkWith alliance SkIn each information about firms, wherein,For connection
The set of alliance, natural number k are alliance's sequence number, and its maximum, the total number of i.e. current alliance are K；Each member in the alliance
Information includes：Each member of alliance and its respective income in non-cooperation, average member's income of alliance, each member are to currently
The gain of the subscriber channel under the remote radio unit (RRU) being polled to.
(c) Base-Band Processing pond check the alliance of current poll whether current poll remote radio unit (RRU) historical record
In variable H (i), H (i) is the set that i-th remote radio unit (RRU) of record has been added to traversed alliance.
If in historical record H (i) of the remote radio unit (RRU) that the alliance of current poll is present in current poll, no
Make any process, directly start poll next one alliance Sk+1, that is, return and perform rapid (c)；
If in historical record H (i) of the remote radio unit (RRU) that the alliance of current poll does not have current poll, then examined
Survey and judge whether the remote radio unit (RRU) of current poll meets the condition of the alliance for being added to current poll, i.e., whether meet
Defection order criterions.
Now, if the remote radio unit (RRU) of the poll is unsatisfactory for defection order criterions, do not make any process,
Directly start poll next one alliance Sk+1, that is, return and perform rapid (c).
If the remote radio unit (RRU) of the poll meets defection order criterions, by the alliance of poll and its be work as
The new income that the remote radio unit (RRU) of front poll brings all is stored in the alternative switching collection Θ of the remote radio unit (RRU) of current poll；
In formula, Θ is possible to the set of the alliance for adding by the remote radio unit (RRU) of current poll.
In execution step (c), certain remote radio unit (RRU) AiAfter selecting to be added to an alliance in certain poll, can
Other remote radio unit (RRU)s are added when energy meeting is because of follow-up poll so that the alliance no longer gives AiWhen bringing optimum performance, just select
The alliance is left, it is unstable so as to cause alliance system structure periodic vibration occur.For this purpose, dividing for each remote radio unit (RRU)
With a historical record variable, for the periodicity concussion for ensureing coalition structure：Remote radio unit (RRU) is selected every time
After adding certain existing alliance, the information about firms of the alliance is just all added to the historical record variable of the remote radio unit (RRU)
In；When the remote radio unit (RRU) continues other existing alliances of poll, first check whether the alliance of the poll belongs to its history and remember
Record：For the alliance for belonging to historical record, illustrate that the remote radio unit (RRU) was previously joined the alliance but exited later,
The alliance, poll next one alliance are directly skipped then；Thereby assuring that a stable alliance can be reached when the cycle performs every time
Structure.
D () judges whether the remote radio unit (RRU) of current poll has not also traveled through existing coalition structure, if so, then continues
The next alliance of traversal, that is, return execution step (c), until current poll remote radio unit (RRU) has stepped through and completes existing
All alliances in alliance's structure；
E () detects and judges whether the alternative switching collection Θ of the remote radio unit (RRU) of current poll is empty, is if so, then had
Coalition structure is not changed, and returns execution step (b), starts poll next one remote radio unit (RRU)；If it is not, then Base-Band Processing pond
The remote radio unit (RRU) of current poll is added in alternative switching collection Θ brings user's income and alliance's average user to receive to which
In the both maximum alliance of benefit, while Base-Band Processing pond updates existing coalition structure beingAnd by the far end radio frequency list
The alliance information that unit selects the two kinds of incomes for adding all maximum is also added to the historical record H of the remote radio unit (RRU) of current poll
In (i).
F () judges whether to have stepped through the whole remote radio unit (RRU)s of poll, if it is not, then poll next one far end radio frequency list
First Ai+1, return execution step (b)；If so, then perform subsequent step (g).
G the inspection of () Base-Band Processing pond this time completes to travel through poll whole radio frequency unit after, current existing coalition structure phase
For beginning stepping through whether the coalition structure before poll changes, if so, then illustrate that the division of alliance is not stable, continue weight
It is new to travel through all remote radio unit (RRU)s of poll, that is, return execution step (a)；If it is not, then illustrate that alliance divides to have reached stablize,
The algorithm performs are finished.Fig. 2 illustrates a kind of possible alliance's result.
Step 3：Under the control of Base-Band Processing pond, in each alliance, member is taken including time division multiple acess, interference alignment and ripple
The mode of beam figuration eliminates alliance's internal interference, carries out data transmission.
Although the remote radio unit (RRU) method of forming an alliance can use various interference cancellation techniques, because of interference different in alliance
Cancellation determines the different calculations of allied member's income, and then affects whether remote radio unit (RRU) coalizes；Also
It is that the coalition structure formed by coalition formation algorithm depends on the interference cancellation that step 3 is adopted in alliance.
Finally, Base-Band Processing pond periodically carries out above-mentioned each step, to adapt to the shifting of user under remote radio unit (RRU)
Dynamic property.
Inventions have been the repeatedly simulation implementation test of embodiment, to verify the superiority of the inventive method, and
The simulation criteria result of the present invention is contrasted with traditional noncooperative systematic function.Fig. 6 is the inventive method and tradition
Contrast of the non-cooperation method on systematic entirety energy；Fig. 7 is that of the invention and traditional non-cooperation method is averagely received in radio frequency unit
Contrast in benefit.
Shown in Figure 6, after the inventive method, systematic entirety can be substantially better than and under traditional non-cooperation be
System overall performance, and with the lifting of remote radio unit (RRU) quantity, presently embodied performance advantage out is gradually obvious.
Meanwhile, with the increase of remote radio unit (RRU) number, system interference is limited, either the inventive method or traditional non-partner
Method, systematic entirety energy growth trend are slow, but the present invention is substantially better than traditional non-cooperation method all the time.
Shown in Figure 7, the radio frequency unit average behavior of the present invention is better than traditional non-cooperation method.Although radio frequency unit number
Amount increases and causes interference with increase and average behavior and reduce, but the present invention is better than traditional non-cooperation method all the time, and with penetrating
The increase of frequency element number, the performance advantage of the present invention become apparent from.
Claims (7)
1. the descending dynamic interference coordination method in a kind of highly dense set network based on game, it is characterised in that：By a base
Each remote radio unit (RRU) under the management of tape handling pond is modeled as the participant in downlink transfer resource game, and each participant is in ginseng
During game and competition, remote radio unit (RRU) RRH can select to cooperate with each other to lift its status in systems；And because
Each remote radio unit (RRU) under one Base-Band Processing pond management adopts different game competitive strategies so that all participants draw
It is divided into different alliances, member is using the particular technology partner for including time division multiple acess, interference alignment and wave beam forming in alliance
Formula, and eliminate alliance's internal interference；But it is between different alliances and uncooperative, therefore the remote radio unit (RRU) of any other alliance is still to non-
Remote radio unit (RRU) in this alliance is interfered, i.e., the alliance model is the Game with Coalitions of zoned format；Methods described includes
Operations described below step：
(1) starting stage of each resource allocation cycle, all remote radio unit (RRU)s under the management of Base-Band Processing pond are non-conjunction
Make mode, i.e. each remote radio unit (RRU) and form the alliance for there was only its own member；
(2) field feedback of all remote radio unit (RRU)s under its management is collected in Base-Band Processing pond, takes the alliance of setting
Remote radio unit (RRU) is divided into different alliances by formation algorithm；And to adapt to the mobility of remote radio unit (RRU) user, distal end
It is periodically-varied that alliance's dividing mode between radio frequency unit is mechanical periodicity, i.e. coalition structure；Therefore in the step, base band
Processing pond dynamic, periodically execution operations described below content：
(21) remote radio unit (RRU) user feeds back the serving radio unit present channel letter of the user for its radio frequency unit for servicing
The information of breath and other radio frequency units that currently user is interfered：Wherein, the serving radio unit of the user is currently believed
Road information includes：The channel gain of the serving radio unit on different resource, Signal to Interference plus Noise Ratio of the user on different resource
SINR and the transmission power of the serving radio unit on different resource；Current other radio frequency units that the user is interfered
Information include：On different resource, the channel gain of other radio frequency units and the user, other radio frequency units are in different resource
On interference strength, active user is interfered other radio frequency units ID set；
(22) all field feedbacks in its span of control of Base-Band Processing pond centralized collection：The feedback of remote radio unit (RRU) user
Information is transmitted to Base-Band Processing pond via low time delay optical transfer network, and the corresponding virtual processor of each remote radio unit (RRU) shares this
A little channel informations, for being convenient for consulting cooperation between these remote radio unit (RRU)s；
(23) Base-Band Processing pond concentrate complete coalition formation algorithm, it is not necessary to each remote radio unit (RRU) by traditional base station interface that
This interaction, reduces processing delay and exchanges the power consumption of information：Base-Band Processing pond is using shared information and according to setting criterion by far
End-fire frequency dividing elements are different alliances, and the relatively low remote radio unit (RRU) of interference strength suffered by part is unsatisfactory for being formed because of which
The criterion of alliance and do not participate in any other alliance, still maintain there was only the alliance of itself single member；Alliance is formed namely
When can not bring extra returns for certain or some remote radio unit (RRU)s, these remote radio unit (RRU)s just select not any with other
Remote radio unit (RRU) cooperation；
(3) under the control of Base-Band Processing pond, in each alliance, member is taken including time division multiple acess, interference alignment and wave beam forming
Mode eliminates alliance's internal interference, carries out data transmission.
2. method according to claim 1, it is characterised in that：Methods described is disappeared using the approach to cooperation of tdma
During except alliance's internal interference, the antenna amount of antenna amount and user to each radio frequency unit is not required, and in each time slot
In alliance, the remote radio unit (RRU) of all members can be while service dispatch user, increases useful letter by increasing signal copy
Number, compare SINR so as to the letter for improving receiver is disturbed；And connection is eliminated using the approach to cooperation of interference alignment or beamforming technique
During alliance's internal interference, then radio frequency unit should configure many antennas, but the antenna amount of receiver is not required.
3. method according to claim 1, it is characterised in that：Methods described is applied to cloud wireless access network C-RAN frameworks
Remote radio unit (RRU) set in highly dense set network, under one Base-Band Processing pond managementIn each remote radio unit (RRU) all use identical resource, each remote radio unit (RRU) energy
The user equipment of enough remote radio unit (RRU)s for servicing multiple random distributions simultaneously, and each user under each remote radio unit (RRU)
Different subchannels are taken, a user can only be distributed to per sub-channels under a remote radio unit (RRU) simultaneously and used；Formula
In, the sum of the sequence number and its maximum number, i.e. remote radio unit (RRU) of natural number subscript i and N respectively remote radio unit (RRU)s.
4. method according to claim 1, it is characterised in that：Although the remote radio unit (RRU) method of forming an alliance can use any
Interference cancellation techniques, but because interference cancellations different in alliance determines the different calculations of allied member's income, and then
Affect whether remote radio unit (RRU) coalizes；The namely coalition structure formed by coalition formation algorithm depends on step (3)
The interference cancellation adopted in alliance.
5. method according to claim 1, it is characterised in that：In the step (23), remote radio unit (RRU) is divided into
The setting criterion of different alliances is defection order judgment criterions：Each remote radio unit (RRU) is divided in different alliances
When, the remote radio unit (RRU) being polled to will be made to meet following three conditions after adding new alliance：Make the user's income being polled to big
User's income in which in old alliance, new alliance all user's total revenues are more than all members in the alliance in non-cooperation
User's income sum, and newly average member's income of alliance is average before the remote radio unit (RRU) is received more than the new alliance
Member's income；Wherein, all user's total revenues of alliance are the user's income sum after all allied members form an alliance, and alliance puts down
Member's income is the business of all user's total revenues divided by allied member's number of alliance.
6. method according to claim 1, it is characterised in that：In the step (23), it is many that Base-Band Processing pond performs the time-division
The coalition formation algorithm of location mode includes following operation content：
(a) Base-Band Processing pond traversal poll its management under each remote radio unit (RRU) Ai, in formula, natural number subscript i is penetrated for distal end
Frequency unit number；
B () Base-Band Processing pond is the remote radio unit (RRU) A being currently polled toiDetection includes existing alliance's frameworkEach alliance S thereinkWith alliance SkIn each information about firms, wherein,For connection
The set of alliance, natural number k are alliance's sequence number, and its maximum, the total number of i.e. current alliance are K；Each member in the alliance
Information includes：Each member of alliance and its respective income in non-cooperation, average member's income of alliance, each member are to currently
The gain of the subscriber channel under the remote radio unit (RRU) being polled to；
(c) Base-Band Processing pond check the alliance of current poll whether current poll remote radio unit (RRU) historical record variable
In H (i), H (i) is the set that i-th remote radio unit (RRU) of record has added traversed alliance；
If in historical record H (i) of the remote radio unit (RRU) that the alliance of current poll is present in current poll, do not appointed
Where is managed, and directly starts poll next one alliance Sk+1, that is, return execution step (c)；
If in historical record H (i) of the remote radio unit (RRU) that the alliance of current poll does not have current poll, then detect and
Judge whether the remote radio unit (RRU) of current poll meets the condition of the alliance for being added to current poll, i.e., whether meet
Defection order criterions；
Now, if the remote radio unit (RRU) of the poll is unsatisfactory for defection order criterions, any process is not made, directly
Start poll next one alliance Sk+1, that is, return execution step (c)；
If the remote radio unit (RRU) of the poll meets defection order criterions, by the alliance of the poll and its be current
The new income that the remote radio unit (RRU) of poll brings all is stored in the alternative switching collection Θ of the remote radio unit (RRU) of current poll；Formula
In, Θ is possible to the alliance for adding set by the remote radio unit (RRU) of current poll；
D () judges whether the remote radio unit (RRU) of current poll has not also traveled through existing coalition structure, if so, then continue traversal
Next alliance, that is, return execution step (c), until current poll remote radio unit (RRU) has stepped through completes existing alliance's knot
All alliances in structure；
E () detects and judges whether the alternative switching collection Θ of the remote radio unit (RRU) of current poll is empty, if so, then has alliance
Structure is not changed, and returns execution step (b), starts poll next one remote radio unit (RRU)；If it is not, then Base-Band Processing pond ought
The remote radio unit (RRU) of front poll brings user's income and alliance average user income two to which in being added to alternative switching collection Θ
In all maximum alliance of person, while Base-Band Processing pond updates existing coalition structure beingAnd the remote radio unit (RRU) is selected
Select historical record H (i) that all maximum alliance information of two kinds of incomes of addition is also added to the remote radio unit (RRU) of current poll
In；
F () judges whether to have stepped through the whole remote radio unit (RRU)s of poll, if it is not, then poll next one remote radio unit (RRU)
Ai+1, return execution step (b)；If so, then perform subsequent step (g)；
G () Base-Band Processing pond checked after this time completing to travel through poll whole radio frequency unit, current existing coalition structure relative to
Begin stepping through whether the coalition structure before poll changes, if so, then illustrate that the division of alliance is stable, continue again time
The all remote radio unit (RRU)s of poll are gone through, that is, returns execution step (a)；If it is not, then illustrating that alliance divides has reached stable, the calculation
Method is finished.
7. method according to claim 6, it is characterised in that：In the step (c), certain remote radio unit (RRU) AiAt certain
During secondary poll select be added to an alliance after, may because of follow-up poll when add other remote radio unit (RRU)s so that the connection
Alliance no longer gives AiWhen bringing optimum performance, just select to leave the alliance, so as to causing alliance system structure periodic vibration occur
It is unstable；For this purpose, distribute a historical record variable for each remote radio unit (RRU), for ensureing coalition structure
Periodically shake：After remote radio unit (RRU) selects to add certain existing alliance every time, just the information about firms of the alliance is all added
To in the historical record variable of the remote radio unit (RRU)；When the remote radio unit (RRU) continues other existing alliances of poll, first examine
Whether the alliance for looking into the poll belongs to its historical record：For the alliance for belonging to historical record, the remote radio unit (RRU) is illustrated
It was previously joined the alliance but exited later, then directly skipped the alliance, poll next one alliance；Thereby assuring that all every time
Phase can reach a stable coalition structure when performing.
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| CN113811014A (en) * | 2015-09-30 | 2021-12-17 | 中兴通讯股份有限公司 | Access method and device of wireless network |
| TWI589174B (en) * | 2015-12-07 | 2017-06-21 | 國立交通大學 | Cooperative transmission system for multiple access point in wireless local area and method thereof |
| CN105517167B (en) * | 2015-12-17 | 2019-06-21 | 西安电子科技大学 | A kind of method for managing resource towards interference alignment in intensive isomery cellular network |
| CN105703855B (en) * | 2016-02-01 | 2019-07-09 | 桂林电子科技大学 | A kind of balanced field game method based on selectivity interference alignment in cognitive system |
| CN105873037B (en) * | 2016-06-01 | 2019-05-17 | 北京邮电大学 | One kind preventing interception method and device |
| CN107425885B (en) * | 2017-08-02 | 2020-04-07 | 西安电子科技大学 | CoMP (coordinated Multi-point) down-mixing dynamic clustering method based on coalition game |
| CN110855593B (en) * | 2019-10-29 | 2021-01-15 | 北京邮电大学 | Downlink communication method of single-code cyclic shift multiple access system |
| CN111757354B (en) | 2020-06-15 | 2021-07-20 | 武汉理工大学 | Multi-user slicing resource allocation method based on competitive game |
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