CN101448321B - Method for sharing frequency spectrum resource of isomerism wireless network and device thereof - Google Patents
Method for sharing frequency spectrum resource of isomerism wireless network and device thereof Download PDFInfo
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- CN101448321B CN101448321B CN2008102252302A CN200810225230A CN101448321B CN 101448321 B CN101448321 B CN 101448321B CN 2008102252302 A CN2008102252302 A CN 2008102252302A CN 200810225230 A CN200810225230 A CN 200810225230A CN 101448321 B CN101448321 B CN 101448321B
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Abstract
The embodiment of the invention provides a method for sharing frequency spectrum resource of an isomerism wireless network and a device thereof. The method comprises the following steps: a bandwidth requirement of a current network in designated time is predicted; if residual bandwidth resource of the current can not meet the predicted bandwidth requirement, then other wireless network bandwidth resource in the same overlay area is searched, then bandwidth resource dispatch is carried out on the searched wireless network which has useable and unoccupied bandwidth resource so as to meet the predicted bandwidth requirement of the current network. Therefore, the method effectively improves the utilization rate of wireless resource of the isomerism wireless network, the access rate of customer service and the throughput of the system, thus improving the performance of the system.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of method and device of heterogeneous wireless network sharing frequency spectrum resource.
Background technology
Along with the fast development of the communication technology, multiple wireless network occurred, and constituted heterogeneous wireless network, but because the finiteness of usable spectrum resource still can't satisfy the demand that the wireless traffic sharp increase is produced.Simultaneously, studies show that much there is very serious idle and wasting phenomenon in the frequency spectrum resource that has distributed, in current most of frequency ranges of having distributed, utilance is all between 15%～85%.Therefore, study rational sharing frequency spectrum resource scheme, in heterogeneous wireless network, effectively utilize its frequency spectrum resource to provide better service, become problem demanding prompt solution for the user.
At present, extensively launched idling-resource both at home and abroad to the non-present networks of reasonable use, improve the research of frequency spectrum resource utilization rate, wherein most researchs all are in the heterogeneous wireless network that adopts the independent resource administrative mechanism, carry out that based on the cognitive radio technology distributed frequency spectrum cavity-pocket detects and takies etc.But because its design requires in time to avoid main user, and the flow process of these methods is often all very complicated, makes that the overhead of system is bigger; Also lack in the prior art simultaneously having the technical scheme of the frequency spectrum share scheduling in the joint resource management mechanism heterogeneous wireless network, make wireless resource utility efficiency can not get effective raising always, influenced the performance of system.
Summary of the invention
Embodiment of the present invention technical problem to be solved is to provide a kind of method and device of heterogeneous wireless network sharing frequency spectrum resource.Can effectively improve the wireless resource utility efficiency in the heterogeneous wireless network, and the throughput of customer service access rate and system, and then the performance of elevator system.
Embodiment of the present invention is achieved through the following technical solutions:
A kind of method of heterogeneous wireless network sharing frequency spectrum resource comprises:
The bandwidth demand that the prediction current network is at the appointed time interior;
If the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, then the bandwidth resources information of other wireless networks of same overlay area is retrieved;
The wireless network with available free bandwidth resources that is retrieved is carried out the bandwidth resources scheduling, the feasible prediction bandwidth demand that satisfies described current network.
The bandwidth demand that described prediction current network is at the appointed time interior specifically comprises:
The at the appointed time interior quantity of initiating new business of prediction current network;
Add up the mean value of each professional needed bandwidth resources;
According to the quantity and the described mean value of the new business of being predicted, obtain the at the appointed time interior bandwidth demand value of described current network.
Described if the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, further comprise:
When the remaining bandwidth resource of described current network less than the bandwidth demand of being predicted, and both differences judge that the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted during greater than default buffer value.
Described default buffer value is set according to the resource operating position of current network; The described fixed time is set according to the traffic carrying capacity of current network.
Described the wireless network with available free bandwidth resources that is retrieved is carried out bandwidth resources scheduling, specifically comprises:
If have only the available free bandwidth resources of a wireless network to meet the demands, then select to dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources from this wireless network;
If there are the available free bandwidth resources of a plurality of wireless networks all to meet the demands, then from described a plurality of wireless networks, select one and dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources;
If the available free bandwidth resources of single wireless network can't meet the demands, but a plurality of wireless network available free bandwidth resources sums can meet the demands, then select from described a plurality of wireless networks, to dispatch successively, up to the prediction bandwidth demand that satisfies described current network, and notify described current network and the wireless network respectively dispatched carries out the adjustment and the record of bandwidth resources.
Described method also comprises:
If the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted, then the record that described current network is borrowed bandwidth resources from other wireless networks is checked;
Borrow record if exist, then the wireless network that record is borrowed in existence carries out the liquidation of bandwidth resources.
The described wireless network that record is borrowed in existence carries out the liquidation of bandwidth resources, specifically comprises:
If only borrowed bandwidth resources to a wireless network, then this wireless network is carried out the liquidation of bandwidth resources, the repayment amount is: the remaining bandwidth resource of described current network deducts the difference after the bandwidth demand of being predicted, with the bandwidth resources amount minimum value of being borrowed between the two;
If borrowed bandwidth resources, then these a plurality of wireless networks are carried out successively the liquidation of bandwidth resources according to above-mentioned mode of satisfaction to a plurality of wireless networks.
The embodiment of the invention also provides a kind of device of heterogeneous wireless network sharing frequency spectrum resource, comprising:
The bandwidth demand predicting unit is used to the bandwidth demand of predicting that current network is at the appointed time interior;
The bandwidth resources retrieval unit is used for when the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, the bandwidth resources information of other wireless networks of same overlay area is retrieved;
The bandwidth resources scheduling unit is used for the result for retrieval according to described bandwidth resources retrieval unit, and the wireless network with available free bandwidth resources that is retrieved is carried out the bandwidth resources scheduling, the feasible prediction bandwidth demand that satisfies described current network.
Described device also comprises:
The bandwidth resources judging unit is used to judge whether the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted; When the remaining bandwidth resource of described current network less than the bandwidth demand of being predicted, and both differences are during greater than default buffer value, the remaining bandwidth resource of judging described current network can not satisfy the bandwidth demand of being predicted, and sends judged result to described bandwidth resources retrieval unit.
Described device also comprises:
Bandwidth resources liquidation unit, the remaining bandwidth resource of described current network is used for when can satisfy the bandwidth demand of being predicted, the record that described current network is borrowed bandwidth resources from other wireless networks is checked, and when record was borrowed in existence, the wireless network of existence being borrowed record carried out the liquidation of bandwidth resources.
By the above-mentioned technical scheme that provides as can be seen, at first predict the bandwidth demand that current network is at the appointed time interior; If the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, then the bandwidth resources information of other wireless networks of same overlay area is retrieved; And then the wireless network with available free bandwidth resources that is retrieved is carried out bandwidth resources dispatch, the feasible prediction bandwidth demand that satisfies described current network.So just can effectively improve the wireless resource utility efficiency in the heterogeneous wireless network, and the throughput of customer service access rate and system, thereby promote the performance of system.
Description of drawings
The schematic flow sheet of the embodiment of the invention 1 method that provides is provided Fig. 1;
Fig. 2 is the structural representation of 2 generators of the embodiment of the invention;
Fig. 3 is the networking structure schematic diagram of the described concrete network architecture of embodiment of the present invention;
Fig. 4 is the schematic diagram of described network coverage relation of embodiment of the present invention and initial user number;
Fig. 5 is the simulation calculation result schematic diagram of the customer service access rate of the described system of embodiment of the present invention;
Fig. 6 is the simulation calculation result schematic diagram of the frequency spectrum resource utilization rate of the described system of embodiment of the present invention;
Fig. 7 is the simulation calculation result schematic diagram of the throughput of the described system of embodiment of the present invention.
Embodiment
Embodiment of the present invention provides a kind of method and device of heterogeneous wireless network sharing frequency spectrum resource.In current and passing state information, set up the bandwidth demand forecast model by phase-split network, predict the bandwidth demand that current network is at the appointed time interior, i.e. frequency spectrum resource demand with this then; Then when current network is checked through surplus resources and can not satisfies the bandwidth demand of expection, ask specific processing unit (for example can be joint resource management unit JRRM unit) that the resource use information of other wireless networks of same overlay area is retrieved, from network, carry out the frequency spectrum resource scheduling, to realize effective utilization of idling-resource with more idling-resource.So just can effectively improve the wireless resource utility efficiency in the heterogeneous wireless network, and the throughput of customer service access rate and system, and then the performance of elevator system.
The schematic flow sheet of the embodiment of the invention 1 method that provides is provided, and described method comprises:
Step 11: the bandwidth demand that the prediction current network is at the appointed time interior.
Specifically, be that the at the appointed time interior bandwidth demand amount of current network is predicted, here Yu Ce mode can be carried out manual configuration by the state and the historical information of reference current network, also can set up corresponding forecast model and obtain by the mode of adding up.
For instance, present embodiment can be set up a kind of based on the bandwidth demand forecast model that network state and historical information is carried out analyzing and processing.This forecast model is specified the quantity of initiating new business in predetermined period by calculating, and adds up each professional needed bandwidth resources mean value, realizes estimating system bandwidth demand in the predicted time.
Suppose that the professional connection duration is N, satisfying mean value is the geometric distributions of 1/ (1-μ):
p(N＝n)＝μ
n-1(1—μ)，n＝1，2，3... (1)
In actual applications, the value of μ is usually greater than 0.98; And the value of predetermined period can not be oversize can not be too short, this is because if predicted time is long, in full minute, the dynamic change of network state may make predicted value and actual conditions exist than large deviation, brings invalid predicted operation; And if predicted time is too short,, will reduce the validity and the practical significance of prediction behavior as one number time.In actual mechanical process, the value of predetermined period number must be suitable, for example can be tens of cycles or several seconds; In this case, it is all minimum that interior during this period end of existing business or same user initiate the probability of twice business, just can ignore to the influence that predicts the outcome like this.
Suppose now that in τ cycle all do not have the number of times that professional user initiates business in the network, obeying intensity is λ τ Poisson distribution:
P(X＝k)＝(λτ)
ke
-λτ/k！＝P(k，λτ)(2)
Wherein, k represents τ cycle that current time rises with the professional number of times of interior all Client-initiateds, and P (k, λ τ) expression user initiates k business in τ cycle probability.
The professional number of times of parameter lambda representative all Client-initiateds in unit period, this parameter can dynamically be adjusted according to the business information of system, supposes that network is λ o at the key parameter of last one-period, at preceding τ in the cycle, total m no professional user initiated S item business; If there be M no professional user in the current time system, then can obtain:
On the basis of above-mentioned formula (2) and (3), predict that all users initiate the probability that professional number is k, satisfy Poisson distribution within T cycle:
Suppose to have in the current network M no professional user, then at the appointed time initiate the desired value S of professional number of times in the T
*For:
S
*＝Tλ
* (5)
Simultaneously, again with B
*Professional average bandwidth demand in the expression current period, its value also can be adjusted dynamically according to the historical information on services of network, supposes that network professional average bandwidth requirements when last one-period is predicted is B
o, and the actual separately bandwidth demand of all S item business is Bi, i ∈ [1, S] then has:
So according to above-mentioned formula 5 and 6, just can obtain at the predicted value Bp of T current network bandwidth demand after the cycle be:
B
P＝B
*·S
* (7)
By above-mentioned forecast model, just can obtain the at the appointed time interior bandwidth demand amount of current network by counting statistics, and then carry out following operating procedure.
In addition, owing to consider that the type of service of network service in the practical application and quantity may have certain relevance with the time, key parameter λ in the above-mentioned forecast model and B can utilize the historical information of network service to carry out adaptive dynamic adjustment, so just can predict the variation of network service state more accurately.
Step 12:, then the bandwidth resources information of other wireless networks of same overlay area is retrieved if the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted.
Specifically, after having obtained the bandwidth demand amount of current network at the appointed time, just can compare the remaining bandwidth stock number of current network and the bandwidth demand amount of being predicted, to judge whether abundance of resource.
For instance, the remaining bandwidth resource (being designated as crnt_radio) of current network is compared with prediction bandwidth demand value Bp, if Bp〉crnt_radio, the remaining bandwidth resource that then can judge current network can not satisfy the bandwidth demand of being predicted, just can send the request of frequency spectrum resource scheduling this moment to specific administrative unit, by this specific administrative unit the bandwidth resources information of other wireless networks of same overlay area retrieved.
In addition, for fear of when crnt_radio is close with Bp, frequent request behavior appears, present embodiment can also be introduced buffer value Bu on judgment condition, have only when crnt_radio+Bu＜Bp, current network just sends the frequency spectrum resource dispatch request to specific administrative unit, so that current network state and the bandwidth resources amount that is short of to be described.
Wherein, the bandwidth resources amount that this was short of can be represented with br_radio, this br_radio=Bp-crnt_radio; In addition, described buffer value can be set according to the resource operating position of current network, for example can be 5% of the initial bandwidth resources of current network; And the above specific administrative unit can be joint resource management unit JRRM unit, also can be other network entities with identical function.
Step 13: the wireless network with available free bandwidth resources that is retrieved is carried out the bandwidth resources scheduling, the feasible prediction bandwidth demand that satisfies current network.
Specifically, in operation through above-mentioned steps 12, after the bandwidth resources information of other wireless networks of same overlay area retrieved, acquisition has the wireless network of idle bandwidth resource, frequency in this idle bandwidth resource of contrast, judge whether and in sending the wireless network of dispatch request, to use, thereby determine the wireless network of available free bandwidth resources, and carry out the corresponding bandwidth scheduling of resource according to result for retrieval and operate, make it can satisfy the prediction bandwidth demand of current network.
Difference according to result for retrieval, corresponding processing mode is also different, specifically: first kind of situation, if have only the available free bandwidth resources of a wireless network to meet the demands, then select to dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources from this wireless network.For instance, if have only the available free bandwidth resources (being designated as spr_radio) of a network to satisfy dispatching requirement, be spr_radio 〉=br_radio, then select to dispatch, and two networks that result notification is relevant carry out the adjustment and the record of frequency spectrum resource from this network.
Second kind of situation, if there are the available free bandwidth resources of a plurality of wireless networks all to meet the demands, then from described a plurality of wireless networks, select one and dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources.For instance, if there are the available free bandwidth resources of a plurality of networks all to satisfy the dispatching requirement of br_radio, then selecting one from described a plurality of wireless networks dispatches, here can select to dispatch from the maximum network of idling-resource, also can select to dispatch, specifically can decide according to the operating position of other networks from the minimum network of idling-resource; And then two networks that result notification is relevant carry out the adjustment and the record of frequency spectrum resource.
The third goes situation, if the available free bandwidth resources of single wireless network can't meet the demands, but a plurality of wireless network available free bandwidth resources sums can meet the demands, then select from described a plurality of wireless networks, to dispatch successively, up to the prediction bandwidth demand that satisfies described current network, and notify described current network and the wireless network respectively dispatched carries out the adjustment and the record of bandwidth resources.For instance, if there are not the available free bandwidth resources of single network can satisfy the dispatching requirement of br_radio, but a plurality of network available free resource sums can satisfy, then select from described a plurality of wireless networks, to dispatch successively, here can select to begin to dispatch successively from the maximum network of available free resource, also can select to begin to dispatch successively, specifically can decide according to the operating position of other networks from the minimum network of available free resource; Above-mentionedly dispatch successively, up to the prediction bandwidth demand that can satisfy current network; And then each network of relation of result notification is carried out the adjustment and the record of frequency spectrum resource.
By the enforcement of technique scheme, just can effectively improve the wireless resource utility efficiency in the heterogeneous wireless network, and the throughput of customer service access rate and system, and then promote the performance of system.
In addition, in above-mentioned steps 12,, then can check the record that described current network is borrowed bandwidth resources from other wireless networks if the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted; When checking out that existence borrows when record, just can carry out the liquidation of bandwidth resources to the wireless network that record is borrowed in existence.
Specifically, bandwidth resources have been borrowed if only check out to a wireless network, then only need carry out the liquidation of bandwidth resources to this wireless network, the repayment amount is: the remaining bandwidth resource of described current network deducts the difference after the bandwidth demand of being predicted, with the bandwidth resources amount minimum value of being borrowed between the two.For instance, if only borrowed frequency spectrum resource (being designated as br_radio) to a network, then only the resource of this network is discharged, the repayment amount is min (br_radio, temp), temp=crnt_radio-Bp wherein, the remaining bandwidth resource of expression current network deducts the difference after the bandwidth demand of being predicted; In addition, if br_radio＜temp then can further write down temp=temp-br_radio; Otherwise, further write down temp=0.
If borrowed bandwidth resources, then these a plurality of wireless networks are carried out successively the liquidation of bandwidth resources according to above-mentioned mode of satisfaction to a plurality of wireless networks.For instance, if borrowed frequency spectrum resource, then can discharge processing according to above-mentioned repayment principle successively according to borrowing resource br_radio from less to more or order from more to less to a plurality of networks.
In addition, after carrying out above-mentioned liquidation processing, if temp〉0, the idle bandwidth resource that then can further write down current network is spr_radio=temp, so that lend the corresponding bandwidth resource to other wireless networks.
The embodiment of the invention 2 also provides a kind of device of heterogeneous wireless network sharing frequency spectrum resource, is illustrated in figure 2 as the structural representation of described device, and described device comprises bandwidth demand predicting unit, bandwidth resources retrieval unit and bandwidth resources scheduling unit.
Wherein, described bandwidth demand predicting unit is used to predict the bandwidth demand in current network at the appointed time; The mode of specifically predicting is seen described in the above method embodiment 1.
Described bandwidth resources retrieval unit is used for when the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, the bandwidth resources information of other wireless networks of same overlay area is retrieved.
Described bandwidth resources scheduling unit is used for the result for retrieval according to described bandwidth resources retrieval unit, and the wireless network with available free bandwidth resources that is retrieved is carried out the bandwidth resources scheduling, the feasible prediction bandwidth demand that satisfies described current network.The mode of specifically dispatching is seen described in the above method embodiment 1.
In addition, also can comprise the bandwidth resources judging unit in the above device, described bandwidth resources judging unit is used to judge whether the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted; Wherein, if the remaining bandwidth resource of described current network is less than the bandwidth demand of being predicted, and both differences are during greater than default buffer value, the remaining bandwidth resource of judging described current network can not satisfy the bandwidth demand of being predicted, and sends judged result to described bandwidth resources retrieval unit.
Preferably, also can comprise bandwidth resources liquidation unit in the above device, described bandwidth resources liquidation unit is used for when the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted, the record that described current network is borrowed bandwidth resources from other wireless networks is checked, and when record was borrowed in existence, the wireless network of existence being borrowed record carried out the liquidation of bandwidth resources.The mode of specifically discharging is seen described in the above method embodiment 1.
Above-described device can be arranged in the base station or access point of wireless network; Base station or the access point that also can be arranged to independent functional entity and wireless network maintain the connection.
Among the said apparatus embodiment, each included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize function corresponding; In addition, the concrete title of each functional unit also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
Below at the concrete network architecture, the described method of embodiment of the present invention is described further, the network architecture herein is by LTE-TDD (Long Term Evolution-time division duplex, Long Term Evolution-time division duplex), WiMAX (Worldwide Interoperability for MicrowaveAccess, the interactive inserting of microwave in the whole world) and WLAN (Wireless Local Area Network, WLAN (wireless local area network)) forms, be illustrated in figure 3 as the networking structure schematic diagram of the concrete network architecture, among the figure: all access point AP or base station BS all have cognitive radio module and global position system GPS function, near the relevant frequency spectrum of network the scanning that can be regular, measure interference energy value, and relevant information is reported to specific administrative unit with the GPS address information, i.e. joint resource management unit JRRM unit; JRRM unit determines overlapping covering relation between each network according to the information of being received again then; All simultaneously terminal equipment UE all support the cognitive radio module, can communicate on specified frequency.In addition, for the ease of supporting the described method of embodiment of the present invention, all AP or BS can increase the distribution wireless network bandwidth resource that preface is concentrated as far as possible according to frequency.
During the above-mentioned network architecture and parameter were provided with: comprise 9 base station/access points of three kinds of wireless networks altogether, wherein the AP of 5 WLAN was numbered ID1～ID5; The BS of 3 LTE-TDD is numbered ID6～ID8; The BS of 1 WiMAX is numbered ID9.For reduction procedure, to some parameters of each network, carried out certain simplification as initial bandwidth resources amount and type of service, but do not influenced result's validity, its network coverage relation and initial user number as shown in Figure 4, and its initial spectrum resource and business setting are as shown in the table:
After above-mentioned setting, just can carry out the shared scheduling of heterogeneous wireless network frequency spectrum resource according to the embodiment of the invention 1 described method, this method can be defined as in actual applications the sharing frequency spectrum resource dispatching algorithm (Spectrum Sharing Algorithm, SSA).
The system that is illustrated in figure 5 as when having adopted SSA and not adopted SSA, the simulation calculation result of customer service access rate, as can be seen from the figure: adopt after the SSA, the customer service access rate of system has had bigger lifting; This is because when not adopting SSA, lack frequency spectrum resource if the load of a network is overweight, the service that can only reduce/interrupt existing low priority traffice inserts new business, or directly refuses the access request of this new business, will cause the customer service access rate lower like this; And in the system that adopts SSA, current network can be used frequency spectrum resource by other networks with idling-resource in same overlay area, from realizing inserting new business, so also just effectively raises the access rate of customer service.
In addition, in above-mentioned Fig. 5, when time t＜30, there is bigger reduction trend in the access rate curve, and this is that system resource is more because do not have business when just having begun, and the customer service access rate is higher; Because resource is taken in a large number, the customer service access rate begins to reduce, and tends towards stability at last again then; From figure, also as can be seen, adopt the system of SSA can keep higher access rate all the time.
Be illustrated in figure 6 as the simulation result of system spectral resources utilance.As can be seen from the figure: when adopting SSA, because the idling-resource of system has obtained utilizing more fully, when the frequency spectrum resource utilization rate of system will obviously be better than not adopting the SSA algorithm, the average lifting capacity of its frequency spectrum resource utilization rate was about 20%.
Be illustrated in figure 7 as the simulation result of throughput of system.From figure also as can be seen: after adopting the SSA algorithm, the throughput of system has also obtained tangible lifting, and average lifting capacity also is approximately 20%, and is similar to the lifting degree of the frequency spectrum resource utilization rate of system.
In sum, embodiment of the present invention can effectively improve the wireless resource utility efficiency in the heterogeneous wireless network, and the throughput of customer service access rate and system, thereby has promoted the performance of system.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (9)
1. the method for a heterogeneous wireless network sharing frequency spectrum resource is characterized in that,
The bandwidth demand that the prediction current network is at the appointed time interior;
If the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, then the bandwidth resources information of other wireless networks of same overlay area is retrieved;
The wireless network with available free bandwidth resources that is retrieved is carried out the bandwidth resources scheduling, the feasible prediction bandwidth demand that satisfies described current network;
Wherein, described the wireless network with available free bandwidth resources that is retrieved is carried out bandwidth resources scheduling, specifically comprises:
If have only the available free bandwidth resources of a wireless network to meet the demands, then select to dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources from this wireless network;
If there are the available free bandwidth resources of a plurality of wireless networks all to meet the demands, then from described a plurality of wireless networks, select one and dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources;
If the available free bandwidth resources of single wireless network can't meet the demands, but a plurality of wireless network available free bandwidth resources sums can meet the demands, then select from described a plurality of wireless networks, to dispatch successively, up to the prediction bandwidth demand that satisfies described current network, and notify described current network and the wireless network respectively dispatched carries out the adjustment and the record of bandwidth resources.
2. the method for claim 1 is characterized in that, the bandwidth demand that described prediction current network is at the appointed time interior specifically comprises:
The at the appointed time interior quantity of initiating new business of prediction current network;
Add up the mean value of each professional needed bandwidth resources;
According to the quantity and the described mean value of the new business of being predicted, obtain the at the appointed time interior bandwidth demand value of described current network.
3. the method for claim 1 is characterized in that, and is described if the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, further comprises:
When the remaining bandwidth resource of described current network less than the bandwidth demand of being predicted, and both differences judge that the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted during greater than default buffer value.
4. method as claimed in claim 3 is characterized in that, described default buffer value is set according to the resource operating position of current network; The described fixed time is set according to the traffic carrying capacity of current network.
5. the method for claim 1 is characterized in that, described method also comprises:
If the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted, then the record that described current network is borrowed bandwidth resources from other wireless networks is checked;
Borrow record if exist, then the wireless network that record is borrowed in existence carries out the liquidation of bandwidth resources, discharges the corresponding bandwidth stock number.
6. method as claimed in claim 5 is characterized in that, the described wireless network that record is borrowed in existence carries out the liquidation of bandwidth resources, specifically comprises:
If only borrowed bandwidth resources to a wireless network, then this wireless network is carried out the liquidation of bandwidth resources, the repayment amount is: the remaining bandwidth resource of described current network deducts the difference after the bandwidth demand of being predicted, with the bandwidth resources amount minimum value of being borrowed between the two;
If borrowed bandwidth resources, then these a plurality of wireless networks are carried out successively the liquidation of bandwidth resources according to above-mentioned mode of satisfaction to a plurality of wireless networks.
7. the device of a heterogeneous wireless network sharing frequency spectrum resource is characterized in that, comprising:
The bandwidth demand predicting unit is used to the bandwidth demand of predicting that current network is at the appointed time interior;
The bandwidth resources retrieval unit is used for when the remaining bandwidth resource of described current network can not satisfy the bandwidth demand of being predicted, the bandwidth resources information of other wireless networks of same overlay area is retrieved;
The bandwidth resources scheduling unit is used for the result for retrieval according to described bandwidth resources retrieval unit, and the wireless network with available free bandwidth resources that is retrieved is carried out the bandwidth resources scheduling, the feasible prediction bandwidth demand that satisfies described current network;
Wherein, described the wireless network with available free bandwidth resources that is retrieved is carried out bandwidth resources scheduling, specifically comprises:
If have only the available free bandwidth resources of a wireless network to meet the demands, then select to dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources from this wireless network;
If there are the available free bandwidth resources of a plurality of wireless networks all to meet the demands, then from described a plurality of wireless networks, select one and dispatch, and notify described current network and this wireless network of dispatching to carry out the adjustment and the record of bandwidth resources;
If the available free bandwidth resources of single wireless network can't meet the demands, but a plurality of wireless network available free bandwidth resources sums can meet the demands, then select from described a plurality of wireless networks, to dispatch successively, up to the prediction bandwidth demand that satisfies described current network, and notify described current network and the wireless network respectively dispatched carries out the adjustment and the record of bandwidth resources.
8. device as claimed in claim 7 is characterized in that, described device also comprises:
The bandwidth resources judging unit is used to judge whether the remaining bandwidth resource of described current network can satisfy the bandwidth demand of being predicted; When the remaining bandwidth resource of described current network less than the bandwidth demand of being predicted, and both differences are during greater than default buffer value, the remaining bandwidth resource of judging described current network can not satisfy the bandwidth demand of being predicted, and sends judged result to described bandwidth resources retrieval unit.
9. device as claimed in claim 7 is characterized in that, described device also comprises:
Bandwidth resources liquidation unit, the remaining bandwidth resource of described current network is used for when can satisfy the bandwidth demand of being predicted, the record that described current network is borrowed bandwidth resources from other wireless networks is checked, and when record is borrowed in existence, the wireless network of existence being borrowed record carries out the liquidation of bandwidth resources, discharges the corresponding bandwidth stock number.
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| CN102056245B (en) * | 2009-10-27 | 2014-04-30 | 中兴通讯股份有限公司 | Method for sharing bandwidth among wireless devices and wireless devices |
| CN102202314B (en) * | 2010-03-26 | 2014-11-05 | 北京邮电大学 | Method and system for realization of frequency spectrum leasing |
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2008
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