CN105323320A - Content distribution method and device - Google Patents
Content distribution method and device Download PDFInfo
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- CN105323320A CN105323320A CN201510765514.0A CN201510765514A CN105323320A CN 105323320 A CN105323320 A CN 105323320A CN 201510765514 A CN201510765514 A CN 201510765514A CN 105323320 A CN105323320 A CN 105323320A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0893—Assignment of logical groups to network elements
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Abstract
The invention discloses a content distribution method and device, relating to the technical field of communication networks. On the premise of ensuring the cost, the access delay of users can be reduced. The embodiment of the invention comprises the following steps: periodically counting the access delay through a first content server set, and performing a borrowing operation or a dividing operation when the access delay is more than or equal to a congestion threshold; when the access delay is more than a congestion early-warning threshold and less than the congestion threshold, recovering a borrowed content server or recovering to a state before a combining operation is performed; when the access delay is more than an idle threshold and less than or equal to the congestion early-warning threshold, recovering to a state before the dividing operation is performed, returning the borrowed content server, and giving a recovery early-alarming; and, when the access delay is less than or equal to the idle threshold, recovering the first content server to a state before the dividing operation is performed, returning the borrowed content server, and performing the combining operation. The scheme provided by the embodiment of the invention is applied to a content distribution process.
Description
Technical field
The present invention relates to technical field of communication network, particularly relate to a kind of method and device of contents distribution.
Background technology
Content distributing network to be a kind ofly made up of content server, one deck intelligent virtual network on existing Internet basic.The content server of traditional content distributing network is between core net and the Internet, when receiving the access request of user, can the real-time load state according to network traffics, each content server, each content server be that user distributes nearest content server to information such as the distance of user and corresponding times, user's access time delay can be reduced.
At present, in order to reduce user's access time delay further, content distributing network can be sunk down into base station side, for each base station configures a content server, when base station needs visit data, first judge whether to obtain data from the content server configured for this base station, if can not get, obtain data by core net again, if can get, then can not obtain data by core net.
But, the number of users of single base station carrying is limited, therefore in content server, the hit rate of data is lower, when the number of users of base station carrying is less, the memory space of content server needs the abundant base station of very big guarantee just can obtain the data of request by the content server that access is each self-configuring, but for the cost of content server configuration large buffer memory is higher, if and not for content server configuration large buffer memory the hit rate of visit data can be made low, cause the access time delay of user long, so prior art can not under the prerequisite of wananty costs, reduce the access time delay of user.
Summary of the invention
Embodiments of the invention provide a kind of method and device of contents distribution, under the prerequisite of wananty costs, can reduce the access time delay of user.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A method for contents distribution, described method is applied in content delivering system, and described content delivering system comprises content server and base station, and one group of content server serves a group of base stations, and described method comprises:
First content server group periodic statistics access time delay, described access time delay is the average delay of the base station in the group of base stations of described first content server group service to described first content server group access data;
When described access time delay is more than or equal to congestion threshold, described first content server group performs uses operation or splitting operation, wherein, describedly use the content server being operating as and using dormancy in contiguous content server group, described splitting operation is for be split at least two sub-content server groups by described first content server group;
When described access time delay is greater than congestion alarm thresholding and is less than described congestion threshold, described first content server group reclaims by the content server used or the state returned to before execution union operation, wherein, described union operation is for merge into a content server group by least two content server groups;
When described access time delay is greater than idle thresholding and is less than or equal to described congestion alarm thresholding, described first content server group returns to the state performed before splitting operation, the content server used is given back, and sending recovery early warning, described recovery early warning is for representing that described first content server group prepares to reclaim the content server used by contiguous content server group;
When described access time delay is less than or equal to described idle thresholding, described first content server group returns to the state performed before splitting operation, is given back by the content server used, and performs union operation.
A device for contents distribution, described application of installation is in content delivering system, and described content delivering system comprises content server and base station, and one group of content server serves a group of base stations, and described device comprises:
Statistic unit, for periodic statistics access time delay, described access time delay is the average delay of the base station in the group of base stations of first content server group service to described first content server group access data;
Performance element, for when described access time delay is more than or equal to congestion threshold, operation or splitting operation are used in execution, wherein, describedly use the content server being operating as and using dormancy in contiguous content server group, described splitting operation is for be split at least two sub-content server groups by described first content server group; When described access time delay is greater than congestion alarm thresholding and is less than described congestion threshold, reclaim by the content server used or the state returned to before execution union operation, wherein, described union operation is for merge into a content server group by least two content server groups; When described access time delay is greater than idle thresholding and is less than or equal to described congestion alarm thresholding, described first content server group is returned to the state performed before splitting operation, the content server used is given back, and sending recovery early warning, described recovery early warning is for representing that described first content server group prepares to reclaim the content server used by contiguous content server group; When described access time delay is less than or equal to described idle thresholding, described first content server group is returned to the state performed before splitting operation, the content server used is given back, and performs union operation.
The method of the contents distribution that the embodiment of the present invention provides and device, first content server group periodic statistics access time delay, and according to access time delay and congestion threshold, relation between congestion alarm thresholding and idle thresholding, relation between adjustment first content server group and group of base stations, compared with prior art, the embodiment of the present invention is when access time delay exceedes congestion threshold, first content server group can be split at least two sub-content server groups, be respectively different base station services, because the memory space of sub-content server and the base station number of serving all are less than first content server, so can response speed be improved, thus enough reduce access time delay, when access time delay is less than idle thresholding, first content server group returns to the state performed before splitting operation, the content server used is given back, and perform union operation, thus the content server group that the content server making the free time go out can be used for all the other access time delay large is used, and serve a group of base stations due to a content server group, so the data of this group of base stations needs only need be stored, can be cost-saving, namely the access time delay of user is reduced under can be implemented in cost-saving prerequisite.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The flow chart of the method for a kind of contents distribution that Fig. 1 provides for the embodiment of the present invention;
The flow chart of the method for the another kind of contents distribution that Fig. 2 provides for the embodiment of the present invention;
The flow chart of the method for the another kind of contents distribution that Fig. 3 provides for the embodiment of the present invention;
The flow chart of the method for the another kind of contents distribution that Fig. 4 provides for the embodiment of the present invention;
The logical construction schematic diagram of the device of a kind of contents distribution that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In order to reduce access time delay, embodiments provide a kind of method of contents distribution, the method is applied in content delivering system, content delivering system comprises content server and base station, one group of content server serves a group of base stations, and as shown in Figure 1, the method comprises:
101, first content server group periodic statistics access time delay.
Wherein, access time delay is the average delay of the base station in the group of base stations of first content server group service to first content server group access data.
It should be noted that, first content server group is any one the content server group in content delivering system, first content server group serves the first group of base stations, the data that the base stations frequency in cell stores in first content server group the first group of base stations is higher.
When base station needs visit data, first to first content server group request msg, if do not store the data needed for base station in first content server group, then base station by core net, transmission network from data source server visit data.
Wherein, the method of statistics access time delay is: in a measurement period, the access time delay of base station in first group of base stations to first content server group request msg is sorted according to order from big to small, average to the access time delay of front N%, the mean value obtained is access time delay corresponding to first content server group.N be more than or equal to 1 and be less than or equal to 100 natural number, when user is more responsive to time delay, N can be set to a less value, when user is insensitive to time delay, then N be set to a larger value.
More novel Benq station is shorter to queuing time during content server group request access data for access time delay, and it is lower to be stored in the probability that the data in content server group are hit by base station, and content server group is more idle; And if access time delay is higher, then illustrate that to may have occurred base stations congested, content server group is busier.
The embodiment of the present invention is also provided with the threshold value of three access time delay according to the size of access time delay, be respectively idle thresholding, congestion alarm thresholding and congestion threshold, idle thresholding is less than congestion alarm thresholding, and congestion alarm thresholding is less than congestion threshold.
102, when access time delay is more than or equal to congestion threshold, first content server group performs uses operation or splitting operation.
Wherein, use the content server being operating as and using dormancy in contiguous content server group, splitting operation is for be split at least two sub-content server groups by first content server group.
Be understandable that, when access time delay is more than or equal to congestion threshold, illustrate that first content server group is congested, so can use content server, more content server is used for being the first group of base stations distributing data, can reduce access time delay.
Or first content server component can also be cleaved at least two sub-content server groups, make a part of base station in every sub-content server group difference first class services group of base stations, memory cell in every sub-content server group stores the higher data of the respective base stations frequency of serving respectively, because the base station number of every sub-content server service tails off, so queuing time when decreasing base station requests data, thus reduce access time delay; Or the base station in the first group of base stations can also be accessed by parallel link and split by first content server component at least two base stations, and also can reduce access time delay simultaneously.
In the another kind of implementation of this step, when access time delay is more than or equal to congestion threshold, first consider to use content server, when there is no the server that can use, first content server group is split at least two sub-content servers, on the basis of operating efficiency promoting content storage distribution system, the access time delay of user can be reduced.
103, when access time delay is greater than congestion alarm thresholding and is less than congestion threshold, first content server group reclaims by the content server used or the state returned to before execution union operation.
Wherein, union operation is for merge into a content server group by least two content server groups.
When access time delay is greater than congestion alarm thresholding and is less than congestion threshold, illustrate that first content server group is busier, so regained the content server lent or union operation before cancelling, can both access time delay be reduced.
104, when access time delay is greater than idle thresholding and be less than or equal to congestion alarm thresholding, first content server group returns to the state performed before splitting operation, is given back by the content server used, and sends recovery early warning.
Wherein, early warning is reclaimed for representing that first content server group prepares to reclaim the content server used by contiguous content server group.
When access time delay is greater than idle thresholding and is less than or equal to congestion alarm thresholding, illustrate that the current busy of first content server group is moderate, then now can according to the situation of first content server group, the splitting operation before cancellation, or the content server used is given back.If the content server in group has been lent contiguous content server group by first content server group, then also need to send recovery early warning, to inform that contiguous content server group prepares to give back the content server used.
105, when access time delay is less than or equal to idle thresholding, first content server group returns to the state performed before splitting operation, is given back by the content server used, and performs union operation.
When access time delay is less than or equal to idle thresholding, illustrate that first content server group is more idle, then can combine also by the content server more idle with other, share storage unit, content server belonging to memory cell without the need to storing data being placed in resting state, using with the content server group of saving electricity or facilitate other comparatively to do.
The method of the contents distribution that the embodiment of the present invention provides, first content server group periodic statistics access time delay, and according to access time delay and congestion threshold, relation between congestion alarm thresholding and idle thresholding, relation between adjustment first content server group and group of base stations, compared with prior art, the embodiment of the present invention is when access time delay exceedes congestion threshold, first content server group can be split at least two sub-content server groups, be respectively different base station services, because the memory space of sub-content server group and the base station number of serving all are less than first content server group, so can response speed be improved, thus enough reduce access time delay, when access time delay is less than idle thresholding, first content server group returns to the state performed before splitting operation, the content server used is given back, and perform union operation, thus the content server group that the content server making the free time go out can be used for all the other access time delay large is used, and serve a group of base stations due to a content server group, so the data of this group of base stations needs only need be stored, can be cost-saving, namely the access time delay of user is reduced under can be implemented in cost-saving prerequisite.
When access time delay is greater than congestion alarm thresholding and is less than congestion threshold, in order to reduce access time delay, preferentially can remove and be used, so in the another kind of implementation provided in the embodiment of the present invention, as shown in Figure 2, above-mentioned 103, when access time delay is greater than congestion alarm thresholding and is less than congestion threshold, first content server group reclaims by the content server used or returns to the state before performing union operation, specifically can be implemented as following step 1031 to 1033:
1031, judge whether exist by the content server used in first content server group.If so, then perform step 1032, if not, then perform step 1033.
1032, reclaim by the content server used.
1033, when determine first content server group be by closing operation and produce time, return to and perform the state before union operation.
Be understandable that, the state returned to before performing union operation is equivalent to first content server component to split, and can reduce access time delay.
Such as, first content server group is combined by A, B, C, D tetra-content servers and is formed, then first content server group is split into A, B, C, D tetra-content server groups by this step again.
For the embodiment of the present invention, when access time delay is greater than congestion alarm thresholding and is less than congestion threshold, can first consider to reclaim by the content server used, to prevent when the visit capacity of base station increases, the access time of user is long, if and when there is not the content server be lent in first content server group, then can prevent to occur that access time delay is greater than the situation generation of congestion threshold by removing the mode merged.
Method flow shown in composition graphs 1, in the another kind of implementation that the embodiment of the present invention provides, as shown in Figure 3, above-mentioned steps 104, when access time delay is greater than idle thresholding and is less than or equal to congestion alarm thresholding, first content server group returns to the state performed before splitting operation, the content server used is given back, and sends recovery early warning, specifically can be implemented as step 1041 to step 1043.
1041, when first content server group is by when once dividing generation, a content server group is reverted to by first content server group with by dividing with first content server group homogeneous the content server group that other access time delay produced are less than or equal to congestion alarm thresholding.
1042, when being all greater than congestion alarm thresholding by the access time delay dividing the other guide server group produced with first content server group homogeneous, or first content server group is not by when dividing generation, is given back by the content server that first content server group is used.
1043, when first content server group does not use content server, but exist by use content server time, send recovery early warning.
For the embodiment of the present invention, when first content server group busy leisurely and comfortable middle time, access time delay does not exceed congestion alarm thresholding, access time delay can not be too high, if so first content server group is produced by splitting operation, then can revert to one group of content server group with other guide server group, if and first content server group is not produced by splitting operation, and busy is moderate, then without the need to using the content server in other guide server group, because the access time delay of Current Content server group is greater than idle thresholding, so preferably send recovery early warning to the contiguous content server group of the content server used in first content server group, prepare to reclaim the content server removed.
Method flow shown in composition graphs 1, in the another kind of implementation that the embodiment of the present invention provides, as shown in Figure 4, above-mentioned steps 105, when access time delay is less than or equal to idle thresholding, first content server group returns to the state performed before splitting operation, the content server used is given back, and performs union operation, specifically can be implemented as following steps:
1051, when determining that first content server group is by when once dividing generation, a content server group is reverted to by first content server group with by dividing with first content server group homogeneous the content server group that other access time delay produced are less than or equal to congestion alarm thresholding.
1052, when being all greater than congestion alarm thresholding by the access time delay dividing the other guide server group produced with first content server group homogeneous, or when determining that first content server group is not by division generation, the content server that first content server group is used is given back.
1053, when determining that first content server group does not use content server, contiguous content server first content server group and access time delay being less than or equal to idle thresholding combines also.
1054, the content server not storing data in the content server group after merging is set to resting state.
Wherein, the content server not storing data is set to resting state and can saves electricity.
The method of the contents distribution that the embodiment of the present invention provides, first content server group periodic statistics access time delay, and according to access time delay and congestion threshold, relation between congestion alarm thresholding and idle thresholding, relation between adjustment first content server group and group of base stations, compared with prior art, the embodiment of the present invention is when access time delay exceedes congestion threshold, first content server group can be split at least two sub-content server groups, be respectively different base station services, because the memory space of sub-content server group and the base station number of serving all are less than first content server group, so can response speed be improved, thus enough reduce access time delay, when access time delay is less than idle thresholding, first content server group returns to the state performed before splitting operation, the content server used is given back, and perform union operation, thus the content server group that the content server making the free time go out can be used for all the other access time delay large is used, and serve a group of base stations due to a content server group, so the data of this group of base stations needs only need be stored, can be cost-saving, namely the access time delay of user is reduced under can be implemented in cost-saving prerequisite.
In order to reduce the access time delay of user, in conjunction with said method flow process, the embodiment of the present invention provides a kind of device of contents distribution, this application of installation is in content delivering system, content delivering system comprises content server and base station, one group of content server serves a group of base stations, and as shown in Figure 5, this device comprises:
Statistic unit 501, for periodic statistics access time delay, access time delay is the average delay of the base station in the group of base stations of first content server group service to first content server group access data.
Performance element 502, for when access time delay is more than or equal to congestion threshold, operation or splitting operation are used in execution, wherein, use the content server being operating as and using dormancy in contiguous content server group, splitting operation is for be split at least two sub-content server groups by first content server group; When access time delay is greater than congestion alarm thresholding and is less than congestion threshold, reclaim by the content server used or the state returned to before execution union operation, wherein, union operation is for merge into a content server group by least two content server groups; When access time delay is greater than idle thresholding and is less than or equal to congestion alarm thresholding, first content server group is returned to the state performed before splitting operation, the content server used is given back, and send recovery early warning, reclaim early warning for representing that first content server group prepares to reclaim the content server used by contiguous content server group; When access time delay is less than or equal to idle thresholding, first content server group is returned to the state performed before splitting operation, the content server used is given back, and performs union operation.
In an alternative embodiment of the invention, performance element 502, also for when exist in first content server group by use content server time, reclaim by the content server used; When not existing by the content server used in first content server group, and determining that first content server group is when being produced by union operation, returning to the state before performing union operation.
In an alternative embodiment of the invention, performance element 502, also for when first content server group is produced by splitting operation, first content server group and the content server group that is less than or equal to congestion alarm thresholding by other access time delay produced with first content server group homogeneous splitting operation are reverted to a content server group; When being all greater than congestion alarm thresholding by the access time delay dividing the other guide server group produced with first content server group homogeneous, or first content server group is not when being produced by division, is given back by the content server that first content server group is used; When first content server group does not use content server, but exist by use content server time, send recovery early warning.
In an alternative embodiment of the invention, performance element 502, also for when first content server group is by when once dividing generation, revert to a content server group by first content server group with by dividing with first content server group homogeneous the content server group that other access time delay produced are less than or equal to congestion alarm thresholding; When being all greater than congestion alarm thresholding by the access time delay dividing the other guide server group produced with first content server group homogeneous, or when determining that first content server group is not by division generation, the content server that first content server group is used is given back; When first content server group does not use content server, contiguous content server first content server group and access time delay being less than or equal to idle thresholding combines also; The content server not storing data in content server group after merging is set to resting state.
The device of the contents distribution that the embodiment of the present invention provides, statistic unit periodic statistics access time delay, performance element is according to access time delay and congestion threshold, relation between congestion alarm thresholding and idle thresholding, relation between adjustment first content server group and group of base stations, compared with prior art, the embodiment of the present invention is when access time delay exceedes congestion threshold, first content server group can be split at least two sub-content server groups, be respectively different base station services, because the memory space of sub-content server group and the base station number of serving all are less than first content server group, so can response speed be improved, thus enough reduce access time delay, when access time delay is less than idle thresholding, first content server group returns to the state performed before splitting operation, the content server used is given back, and perform union operation, thus the content server group that the content server making the free time go out can be used for all the other access time delay large is used, and serve a group of base stations due to a content server group, so the data of this group of base stations needs only need be stored, can be cost-saving, namely the access time delay of user is reduced under can be implemented in cost-saving prerequisite.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in the storage medium that can read, as the floppy disk of computer, hard disk or CD etc., comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, 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 described claim.
Claims (8)
1. a method for contents distribution, is characterized in that, described method is applied in content delivering system, and described content delivering system comprises content server and base station, and one group of content server serves a group of base stations, and described method comprises:
First content server group periodic statistics access time delay, described access time delay is the average delay of the base station in the group of base stations of described first content server group service to described first content server group access data;
When described access time delay is more than or equal to congestion threshold, described first content server group performs uses operation or splitting operation, wherein, describedly use the content server being operating as and using dormancy in contiguous content server group, described splitting operation is for be split at least two sub-content server groups by described first content server group;
When described access time delay is greater than congestion alarm thresholding and is less than described congestion threshold, described first content server group reclaims by the content server used or the state returned to before execution union operation, wherein, described union operation is for merge into a content server group by least two content server groups;
When described access time delay is greater than idle thresholding and is less than or equal to described congestion alarm thresholding, described first content server group returns to the state performed before splitting operation, the content server used is given back, and sending recovery early warning, described recovery early warning is for representing that described first content server group prepares to reclaim the content server used by contiguous content server group;
When described access time delay is less than or equal to described idle thresholding, described first content server group returns to the state performed before splitting operation, is given back by the content server used, and performs union operation.
2. the method for contents distribution according to claim 1, it is characterized in that, described when described access time delay is greater than congestion alarm thresholding and is less than described congestion threshold, described first content server group reclaims by the content server used or the state returned to before execution union operation, comprising:
When exist in described first content server group by use content server time, reclaim by the content server used;
When not existing by the content server used in described first content server group, and determining that described first content server group is when being produced by union operation, returning to the state before performing union operation.
3. the method for contents distribution according to claim 1, it is characterized in that, when described access time delay is greater than idle thresholding and is less than or equal to described congestion alarm thresholding, described first content server group returns to the state performed before splitting operation, the content server used is given back, and send recovery early warning, comprising:
When described first content server group is produced by splitting operation, described first content server group and the content server group that is less than or equal to described congestion alarm thresholding by other access time delay produced with described first content server group homogeneous splitting operation are reverted to a content server group;
When being all greater than described congestion alarm thresholding by the access time delay dividing the other guide server group produced with described first content server group homogeneous, or described first content server group is not by when dividing generation, is given back by the content server that described first content server group is used;
When described first content server group does not use content server, but exist by use content server time, send recovery early warning.
4. the method for contents distribution according to claim 1, it is characterized in that, it is described when described access time delay is less than or equal to described idle thresholding, described first content server group returns to the state performed before splitting operation, the content server used is given back, and perform union operation, comprising:
When described first content server group is by when once dividing generation, revert to a content server group by described first content server group with by dividing with described first content server group homogeneous the content server group that other access time delay produced are less than or equal to described congestion alarm thresholding;
When being all greater than described congestion alarm thresholding by the access time delay dividing the other guide server group produced with described first content server group homogeneous, or when determining that described first content server group is not by division generation, the content server that described first content server group is used is given back;
When described first content server group does not use content server, the contiguous content server that described first content server group and access time delay are less than or equal to described idle thresholding is combined also;
The content server not storing data in content server group after merging is set to resting state.
5. a device for contents distribution, is characterized in that, described application of installation is in content delivering system, and described content delivering system comprises content server and base station, and one group of content server serves a group of base stations, and described device comprises:
Statistic unit, for periodic statistics access time delay, described access time delay is the average delay of the base station in the group of base stations of first content server group service to described first content server group access data;
Performance element, for when described access time delay is more than or equal to congestion threshold, operation or splitting operation are used in execution, wherein, describedly use the content server being operating as and using dormancy in contiguous content server group, described splitting operation is for be split at least two sub-content server groups by described first content server group; When described access time delay is greater than congestion alarm thresholding and is less than described congestion threshold, reclaim by the content server used or the state returned to before execution union operation, wherein, described union operation is for merge into a content server group by least two content server groups; When described access time delay is greater than idle thresholding and is less than or equal to described congestion alarm thresholding, described first content server group is returned to the state performed before splitting operation, the content server used is given back, and sending recovery early warning, described recovery early warning is for representing that described first content server group prepares to reclaim the content server used by contiguous content server group; When described access time delay is less than or equal to described idle thresholding, described first content server group is returned to the state performed before splitting operation, the content server used is given back, and performs union operation.
6. the device of contents distribution according to claim 5, is characterized in that,
Described performance element, also for when exist in described first content server group by use content server time, reclaim by the content server used; When not existing by the content server used in described first content server group, and determining that described first content server group is when being produced by union operation, returning to the state before performing union operation.
7. the device of contents distribution according to claim 5, is characterized in that,
Described performance element, also for when described first content server group is produced by splitting operation, described first content server group and the content server group that is less than or equal to described congestion alarm thresholding by other access time delay produced with described first content server group homogeneous splitting operation are reverted to a content server group; When being all greater than described congestion alarm thresholding by the access time delay dividing the other guide server group produced with described first content server group homogeneous, or described first content server group is not by when dividing generation, is given back by the content server that described first content server group is used; When described first content server group does not use content server, but exist by use content server time, send recovery early warning.
8. the device of contents distribution according to claim 5, is characterized in that,
Described performance element, also for when described first content server group is by when once dividing generation, revert to a content server group by described first content server group with by dividing with described first content server group homogeneous the content server group that other access time delay produced are less than or equal to described congestion alarm thresholding; When being all greater than described congestion alarm thresholding by the access time delay dividing the other guide server group produced with described first content server group homogeneous, or when determining that described first content server group is not by division generation, the content server that described first content server group is used is given back; When described first content server group does not use content server, the contiguous content server that described first content server group and access time delay are less than or equal to described idle thresholding is combined also; The content server not storing data in content server group after merging is set to resting state.
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