CN108377530B - Method and system for generating mobile wireless access network content network slice - Google Patents

Method and system for generating mobile wireless access network content network slice Download PDF

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CN108377530B
CN108377530B CN201810090062.4A CN201810090062A CN108377530B CN 108377530 B CN108377530 B CN 108377530B CN 201810090062 A CN201810090062 A CN 201810090062A CN 108377530 B CN108377530 B CN 108377530B
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content
network slice
controller
information
content network
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CN108377530A (en
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靳浩
陆海亚
赵成林
彭木根
王文博
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

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Abstract

The invention provides a method and a system for generating a mobile wireless access network content network slice, wherein the method comprises the steps that a first controller collects state information required in the process of generating the mobile wireless access network content network slice, and determines network parameters and content parameters according to the current communication resource state information, the content resource state information and the content service request state information; generating corresponding control parameters according to the acquired state information, the network parameters and the content parameters; and generating the content network slice of the mobile wireless access network facing the content service in a static and/or dynamic mode according to the corresponding control parameter. The method can improve the request hit rate of the content service and reduce the access delay of the content service; by optimizing and generating the content network slice, the resource utilization efficiency of the wireless access network can be improved, the content flow load from the mobile wireless access network to the core network is reduced, and the aims of reducing the operation cost and the investment expenditure of the content service are finally achieved.

Description

Method and system for generating mobile wireless access network content network slice
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for generating a mobile radio access network content network slice.
Background
With the rapid development of smart devices, mobile users begin to subscribe to and use more and more mobile internet services. In these mobile internet services, the widely used content traffic occupies a large portion of the network resources of the mobile radio access network.
In order to meet the huge demand of mobile user service application, constructing a heterogeneous mobile wireless access network is an effective solution for improving the user access rate. However, for content-based services, since users generally only pay attention to the content information itself and do not pay attention to the location of the content, an information-centric network (ICN) is proposed as a new network paradigm. In the information center network, a mobile user uploads some contents to a routing node with content caching capacity, and meanwhile, when the user requests the contents, the user can directly obtain required content information from the routing node in which the requested contents are stored, and does not need to obtain the contents in a core network. In ICN, content information is identified, named, and routed based on content rather than using an address-based approach as in traditional IP networks. In order to reduce the service delay of the content service and improve the hit rate of the user request content and the utilization rate of the communication resources, content cache can be deployed at the edge of the ICN network. That is, the content information may be cached at a base station, a micro base station, a wireless access point, or even a user equipment in the radio access network. Therefore, the content service-oriented edge content caching optimization strategy becomes a research hotspot in the heterogeneous mobile wireless access network.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, an object of the present invention is to provide a method for generating a content network slice of a mobile radio access network, which can improve the service quality of a content service, and at the same time, can improve the resource utilization efficiency of the radio access network through the content network slice, thereby reducing the operation cost and the investment expenditure for providing a content information service.
Another object of the present invention is to provide a mobile radio access network content network slice generation system.
In order to achieve the above object, a method for generating a content network slice of a mobile radio access network according to an embodiment of a first aspect of the present invention is applied to a mobile radio access network, and includes: the first controller collects state information required in the process of generating the mobile wireless access network content network slicing, and determines network parameters and content parameters according to the current communication resource state information, the content resource state information and the content service request state information; generating corresponding control parameters according to the acquired state information, the network parameters and the content parameters; generating the mobile wireless access network content network slice in a static and/or dynamic form according to the corresponding control parameter; the generating the mobile radio access network content network slice in a static form according to the corresponding control parameter comprises: according to the corresponding control parameters, based on target network performance indexes and/or user content service quality indexes, performing content network slicing on all or part of content cached in the mobile wireless access network to obtain a plurality of content network slices, wherein each content network slice comprises communication resources and content cache resources which need to be allocated to the content network slice; the generating the mobile radio access network content network slice in a dynamic form according to the corresponding control parameter comprises: according to the content service request sent by the second controller/the third controller controlled by the first controller and the corresponding control parameter, based on the target network performance index and/or the user content service quality index, performing content network slicing on the requested content in the mobile wireless access network to obtain a single content network slice, wherein each content network slice comprises communication resources and content cache resources required to be allocated to the content network slice; the types of the first controller, the second controller, and the third controller may be any one of a macro base station level controller, a micro base station level controller, and a radio access point controller.
The method for generating the mobile wireless access network content network slice provided by the embodiment of the first aspect of the invention comprises the steps of acquiring state information required in the process of generating the mobile wireless access network content network slice, determining network parameters and content parameters according to the current communication resource state information, content resource state information and content service request state information, generating corresponding control parameters according to the acquired state information, network parameters and content parameters, and generating the mobile wireless access network content network slice in a static and/or dynamic mode according to the corresponding control parameters.
In order to achieve the above object, a mobile radio access network content network slice generating system according to an embodiment of the second aspect of the present invention includes: the acquisition module is used for enabling the first controller to acquire state information required in the process of generating the mobile wireless access network content network slicing and determining network parameters and content parameters according to the current communication resource state information, the content resource state information and the content service request state information; the first generation module is used for generating corresponding control parameters according to the acquired state information, the network parameters and the content parameters; a second generation module, configured to generate the mobile radio access network content network slice in a static and/or dynamic manner according to the corresponding control parameter; the second generation module includes: a first generating unit, configured to perform content network slicing on all or part of the content cached in the mobile radio access network according to the corresponding control parameter and based on a target network performance index and/or a user content quality of service index, so as to obtain a plurality of content network slices, where each content network slice includes a communication resource and a content cache resource that need to be allocated to the content network slice; a second generating unit, configured to perform content network slicing on the content requested in the mobile radio access network according to the content service request sent by the second controller/third controller controlled by the first controller and the corresponding control parameter, based on the target network performance index and/or the user content service quality index, so as to obtain a single content network slice, where each content network slice includes a communication resource and a content cache resource that need to be allocated to the content network slice; the types of the first controller, the second controller, and the third controller may be any one of a macro base station level controller, a micro base station level controller, and a radio access point controller.
The system for generating the content network slice of the mobile radio access network according to the embodiment of the second aspect of the present invention acquires the state information required in the process of generating the content network slice of the mobile radio access network, determines the network parameters and the content parameters according to the current communication resource state information, the content resource state information and the content service request state information, generates the corresponding control parameters according to the acquired state information, the network parameters and the content parameters, and generates the content network slice of the mobile radio access network in a static and/or dynamic form according to the corresponding control parameters.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
Fig. 1 is a flowchart illustrating a method for generating a content network slice of a mobile radio access network according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a scenario of a mobile radio access network content network slice generation system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a networking of controllers on a control plane according to an embodiment of the present invention;
fig. 4 is a schematic networking diagram of a functional entity on a user plane in the embodiment of the present invention;
fig. 5 is a functional structure diagram of a macro base station controller according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for generating a content network slice of a mobile radio access network according to another embodiment of the present invention;
fig. 7 is a flowchart illustrating a method for generating a content network slice of a mobile radio access network according to another embodiment of the present invention;
fig. 8 is a flowchart illustrating a method for generating a content network slice of a mobile radio access network according to another embodiment of the present invention;
fig. 9 is a flowchart illustrating a method for generating a content network slice of a mobile radio access network according to another embodiment of the present invention;
FIG. 10 is a functional block diagram of a micro base station controller according to an embodiment of the present invention;
FIG. 11 is a functional block diagram of a wireless access point controller according to an embodiment of the present invention;
FIG. 12 is a functional block diagram of a UE controller according to an embodiment of the present invention;
fig. 13 is a flowchart illustrating a method for generating a content network slice of a mobile radio access network according to another embodiment of the present invention;
fig. 14 is a flowchart illustrating a content network slice generation method for a mobile radio access network according to another embodiment of the present invention;
fig. 15 is a flowchart illustrating a content network slice generation method for a mobile radio access network according to another embodiment of the present invention;
fig. 16 is a schematic diagram of an information acquisition and analysis flow of a macro base station level controller in the embodiment of the present invention;
fig. 17 is a schematic view of an information collection and analysis process of the micro base station controller according to an embodiment of the present invention;
fig. 18 is a schematic view of an information collection and analysis process of a wireless access point controller according to an embodiment of the present invention;
FIG. 19 is a schematic diagram of an information collection and analysis process of a UE controller according to an embodiment of the present invention;
fig. 20 is a schematic flow chart of a method for generating a static content network slice of a macro base station controller according to an embodiment of the present invention;
FIG. 21 is a flowchart illustrating a method for generating a static content network slice of a BSC according to an embodiment of the present invention;
fig. 22 is a schematic flowchart of a method for optimally generating a dynamic content network slice of a macro base station controller according to an embodiment of the present invention;
FIG. 23 is a flowchart illustrating a content network slice information synchronization update maintenance process triggered by a content network slice generation system manager according to an embodiment of the present invention;
FIG. 24 is a diagram illustrating a process of maintaining network slice synchronization update of content due to movement of a user equipment according to an embodiment of the present invention;
FIG. 25 is a flowchart illustrating a centralized content caching control mode configuration process according to an embodiment of the present invention;
fig. 26 is a flowchart illustrating a configuration process of a hybrid content caching control mode according to an embodiment of the present invention;
fig. 27 is a flowchart illustrating a configuration process of a distributed content caching control mode according to an embodiment of the present invention;
FIG. 28 is a diagram illustrating a configuration process of a content network slice optimization generation control scheme of the system in an embodiment of the present invention;
fig. 29 is a schematic flowchart of a static content network slice optimization generation method of a macro base station controller based on a CCSOA algorithm in an embodiment of the present invention;
fig. 30 is a schematic structural diagram of a mobile radio access network content network slice generation system according to an embodiment of the present invention;
fig. 31 is a schematic structural diagram of a mobile radio access network content network slice generation system according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a flowchart illustrating a method for optimally generating a mobile radio access network content network slice according to an embodiment of the present invention.
The method is applied to a mobile wireless access network.
The execution subject of the method may be, for example, a first controller, where the types of the first controller may be any one of a macro base station level controller, a micro base station level controller, and a radio access point controller.
Referring to fig. 1, the method includes:
s101: the first controller collects state information required in the process of generating the mobile wireless access network content network slicing, and determines network parameters and content parameters according to the current communication resource state information, the content resource state information and the content service request state information.
Wherein the state information includes: the number of the second controller/the third controller controlled by the first controller, the first communication related state information between the first controller and the second controller/the third controller, the number of the user terminals controlled by the first controller, the second communication related state information between the second controller/the third controller, the third communication related state information between the second controller/the third controller and the user terminals, the third communication related state information between the user terminals, and the content cache related information to which each controller belongs; and content resource status information and content service request status information;
s102: and generating corresponding control parameters according to the acquired state information, the network parameters and the content parameters.
S103: and generating the content network slice of the mobile wireless access network in a static and/or dynamic mode according to the corresponding control parameters.
In the specific execution process of S103, if the content network slice of the content service oriented mobile radio access network is generated in a static form, then: and according to the corresponding control parameters, based on the target network performance index and/or the user content service quality index, performing content network slicing on all or part of the content cached in the mobile wireless access network to obtain a plurality of content network slices, wherein each content network slice comprises communication resources and content cache resources which need to be allocated to the content network slice.
In the specific execution process of S103, if the content network slice of the mobile radio access network is generated in a dynamic form, then: according to the content service request sent by the second controller/the third controller controlled by the first controller and the corresponding control parameters, based on the target network performance index and/or the user content service quality index, performing content network slicing on the requested content in the mobile wireless access network to obtain a single content network slice, wherein each content network slice comprises communication resources and content cache resources required to be allocated to the content.
The types of the first controller, the second controller, and the third controller may be any one of a macro base station level controller, a micro base station level controller, and a radio access point controller.
Optionally, the first controller is a ue controller, and when the first controller is the ue controller, the second controller/third controller is a controller on the ue side other than the first controller in the mobile radio access network.
Referring to fig. 2, fig. 2 is a schematic view of a scenario of a mobile radio access network content network slice generation system according to an embodiment of the present invention. Which comprises the following steps: a macro base station 21, a micro base station 22, a wireless access point 23, a user terminal 24, a physical link 25 between the macro base station and the micro base station, a physical link 26 between the micro base station and the micro base station, a link 27 between the micro base station and the wireless access point, a communication link 31 between the user terminal and the user terminal, a mobile wireless access network content network slice controller 28, a content network slice generation system manager 29 and a content cache 20. Corresponding content caches 20 are configured on macro base stations, micro base stations, wireless access points, and even user equipment in the wireless access network, and are used for caching content information.
In the embodiment of the invention, in a mobile wireless access network content network slice generation system, related functional entities mainly comprise a content service-oriented mobile wireless access network content network slice generation system manager, a macro base station, a micro base station, a wireless access point and a user terminal; in the specific implementation process, the method for optimally generating content network slices of a mobile radio access network facing to content services may include an initialization process of a system, a configuration process of a system control mode, a configuration process of a content cache control mode, a generation process of content network slices, and a synchronous updating process of content network slice information.
Specifically, the following explains the meanings of the user plane and the control plane of each functional entity, respectively:
(1) a macro base station.
The user plane of the macro base station comprises a content cache region and a communication link to which the macro base station belongs; the control plane comprises a content service oriented mobile wireless access network content network slice macro base station controller.
(2) And (4) a micro base station.
The user plane of the micro base station comprises a content cache region and a communication link to which the macro base station belongs; the control plane comprises a content service oriented mobile radio access network content network slice micro base station controller.
(3) A wireless Access Point (AP).
The wireless access point refers to a wireless access point device or a wireless access control device introduced when the system supports a heterogeneous mobile wireless access network. The user plane of the wireless access point comprises a content cache region and a communication link to which the wireless access point belongs; the control plane contains a content service oriented radio access network content network slice radio access point controller.
(4) A user terminal.
In the user terminal, the user plane comprises a content cache region and a communication link to which the user belongs; the control plane contains a content service oriented mobile radio access network content network slice user terminal controller.
The method for optimally generating the mobile wireless access network content network slice in the embodiment of the invention can be applied to a system for generating the mobile wireless access network content network slice, and is not limited.
In the embodiment of the present invention, on the above-defined control plane, the mobile radio access network content network slice generating system is divided into three stages, i.e., a macro base station stage, a micro base station stage and a user terminal stage, and includes a macro base station level mobile radio access network content network slice macro base station controller (hereinafter referred to as macro base station level controller), a micro base station level mobile radio access network content network slice micro base station controller (hereinafter referred to as micro base station level controller) and a radio access network content network slice wireless access point controller (hereinafter referred to as wireless access point controller), and a user terminal level mobile radio access network content network slice user terminal controller (hereinafter referred to as user terminal controller) of the user terminal, and in addition, may further include information interaction with the macro base station level controller, the micro base station level controller and the wireless access point controller, and a system manager is generated by managing the wireless access network content network slice facing the content service of the whole system.
Referring to fig. 3, fig. 3 is a schematic diagram of networking of a controller on a control plane in the embodiment of the present invention.
In the embodiment of the present invention, on the user plane defined above, in the mobile radio access network content network slice generating system, the user plane includes a communication plane and a content cache plane. The communication plane comprises functional entities such as a macro base station, a micro base station, a wireless access point and a user terminal, and communication links (including wired and wireless links) among the functional entities; and on the content cache plane, the content cache is deployed on a macro base station, a micro base station, a wireless access point and a user terminal.
Referring to fig. 4, fig. 4 is a schematic diagram of networking functional entities on a user plane in the embodiment of the present invention. Wherein, include: macro base station 41, micro base station 42, radio access control point 43, wireless communication link 44, wired communication link 45, and content cache 46 that may be deployed in the macro base station, micro base station, radio access controller point, and user terminal.
In the embodiment of the invention, in the mobile wireless access network content network slice generation system, the controllers at all levels on the control plane complete the optimized generation control process of the content network slice on the user plane through cooperative control, and the main functional entities and the information interaction of the system are explained from the two angles of the control plane and the user plane.
The control plane in the embodiment of the invention mainly comprises a macro base station level controller, a micro base station level controller, a wireless access point controller, a user terminal controller and a content network slice generation system manager which is interacted with the controllers in information and used for finishing the management function related to the generation of the content network slices. The macro base station level controller, the micro base station level controller, the wireless access point controller, and the content network slice generation system manager will be described below.
(1) A macro base station level controller.
The macro base station level controller completes the control function related to the generation of the content network slice of the mobile wireless access network based on the macro base station level, referring to fig. 5, fig. 5 is a functional structure schematic diagram of the macro base station controller in the embodiment of the present invention, which includes: a content service request receiving and responding module 51, a macro base station level content network slice management module 52, a communication module 53, a macro base station level content network slice cache optimization control policy module 54, and a macro base station communication resource module 55, where the macro base station level content network slice management module 52 further includes: a content updating submodule 521, a content caching submodule 522, a content network slice synchronizing submodule 523 and a content network slice searching and recording submodule 524; the macro base station level content network slice cache optimization control policy module 54 further includes: the system comprises a state information acquisition and analysis sub-module 541, a control parameter generation sub-module 542, a content network slice control strategy sub-module 543, and a control strategy output and distribution sub-module 544, wherein the content network slice control strategy sub-module 543 specifically comprises: a static content network slice control policy unit 5431 and a dynamic content network slice control policy unit 5432.
The main functions of each functional module are as follows:
a content service request receiving and responding module 51, which receives the content service request from the micro base station, extracts the content identification information therein, and sends the information to the content network slice searching and recording sub-module 524; and according to the content network slice information search result fed back by the content network slice search and record submodule 524, sending a content service request search result message of the content service request to the micro base station sending the content service request. The content network slice information includes content cache resource information, communication resource information, and optimal manner information for acquiring the content, including but not limited to an identification number of the content, an identification of a content cache submodule 522 where the content is stored, and an optimal path to the content cache submodule, where the optimal path refers to a path when the user terminal acquires the content, and may be selected according to different optimization targets, for example, if a minimum cost for the user terminal to acquire the content is used as an optimization target, the order of local acquisition, neighbor user terminal acquisition, acquisition from a micro base station connected to the user terminal, and acquisition from a macro base station through a micro base station connected to the user terminal may be sorted.
Macro base station level content network slice management module 52: the module completes the recording, updating and searching functions of all content network slice information and content network slices in the system.
The content web slice lookup and recording sub-module 524: the system is used for recording the information of all content network slices in the user terminal; searching corresponding content network slice information in the submodule according to content identification information extracted from the content service request message, and updating content network slice record information according to content network slice control generation information output by the macro base station level content network slice cache optimization control strategy module; and updating the content network slice information according to the content network slice synchronous updating maintenance request message.
The content update sub-module 521: the content network slice generation control module is used for generating control information according to the content network slice output by the control strategy output and distribution submodule 544 of the controller, generating a controlled content cache management mechanism for the content cache submodule 522, and optimizing and resetting the content of the content cache submodule 522; different autonomous content caching control mechanisms can be executed aiming at different contents according to content caching management rules formulated by a local controller; the content cache management mechanism includes a content insertion mechanism and a content removal mechanism, the content insertion mechanism includes but is not limited to a probability cache, a random cache, and the like, and the content removal mechanism includes but is not limited to an LRU, an LFU, or a content removal mechanism that removes cache content according to a time periodicity.
Content network slice synchronization submodule 523: receiving synchronous updating and maintaining request messages of content network slices from a micro base station controller and a wireless access point controller, merging corresponding content cache optimization control processes when the content network slices are generated, and sending the synchronous updating and maintaining request messages of the content network slices after merging to a content network slice generation system manager; receiving a content network slice synchronous updating maintenance request message from a content network slice generation system manager, sending the content network slice synchronous updating maintenance request message to a micro base station level controller and a user terminal controller in the system according to the content network slice information in the message, and controlling the micro base station level controller and the user terminal controller to complete the synchronous updating process of the related content network slice information in the content network slice searching and recording submodule 524.
The content cache submodule 522: for caching all content information provided in the area covered by the macro base station, the sub-module performs different content insertion and content removal mechanisms on the content information of the sub-module based on a controlled content caching management mechanism generated by the content updating sub-module 521 for the content network slice generation control information.
Macro base station level content network slice cache optimization control policy module 54: and finishing content cache optimization control when the content network slice based on the macro base station layer is generated, and generating the content network slice. The main functions of each submodule include:
status information collection and analysis submodule 541: acquiring content network slices required by a system to generate related state information, wherein the related state information comprises but is not limited to micro base station/wireless access point number information, networking state information of a micro base station/wireless access point and a macro base station, controlled user terminal number information, networking state information between the micro base station/wireless access point, networking state information of the micro base station/wireless access point and the user terminal, networking state information between the user terminals and use state information of content caches of all controllers in the system, and the micro base station/wireless access point and the macro base station are controlled based on the view angle of the macro base station; based on the current communication resource state information, content resource state information and content service request state information of the macro base station level visual angle analysis system, the network model type and the content service request analysis result are given, and the network parameters and the content parameters of the system are output;
the control parameter generation submodule 542: generating input control parameters required by the macro base station level content network slice cache optimization control strategy module 54 according to the network parameters and the content parameters output by the state information acquisition and analysis submodule 541;
The content network slice control policy sub-module 543: the submodule mainly comprises an optimization control algorithm during content network slice generation, and comprises a static content network slice control strategy unit 5431 and a dynamic content network slice control strategy unit 5432.
Static content network slicing control policy unit 5431: according to the input control parameters of the control parameter generation submodule 542, taking specific network performance indexes and/or user content service quality indexes as optimization targets, and based on part of the input control parameters and/or system configuration parameters as optimization limiting conditions, completing a content network slice optimization generation process aiming at all contents; outputting content web slices of all content supported by the system, each content web slice comprising communication resources and content caching resources required to be allocated to the content.
Dynamic content network slicing control policy unit 5432: according to the content service request of the user, the input control parameters of the control parameter generation submodule 542 are generated according to the control parameters, the service quality index and/or the network performance index of the user are/is used as an optimization target, the cache optimization placement decision based on the content is completed based on the limitation condition that part of the input control parameters and/or the configuration parameters of the system are/is used as the optimization limitation condition, the content network slice based on the content is generated, and the cache content optimization control result when the content network slice of the content is generated is output.
The control policy output and distribution submodule 544: based on the cache content optimization control result output by the content network slice control strategy sub-module 543 during content network slice generation, content network slice information and content network slice generation control information based on a single content or all contents are output, and the content network slice information and the content network slice generation control information are distributed to a micro base station level controller, a wireless access point controller and a user terminal controller related to the optimization control result.
The communication module 53: and finishing the interaction of control plane information and user plane information related to the generation control of the content network slices among the macro base station controller, the micro base station controller, the wireless access point controller and the content network slice generation system manager.
Macro base station communication resource module 55: the module receives the content network slice generation control information of the control policy output and distribution sub-module 544, and provides communication resources corresponding to the content network slice according to the content network slice generation control information, where the communication resources mainly include communication resources between the user and the macro base station, communication resources between the macro base station and the micro base station, and communication resources between the macro base station and the wireless access point.
The content network slice generation control information is control information for controlling content optimization placement of a content cache submodule to which the micro base station controller, the wireless access point controller and the user terminal controller belong.
Optionally, in some embodiments, the first controller receives a content service request sent by the second controller/the third controller, queries corresponding content network slice information according to content identification information in the content service request, and sends the corresponding content network slice information to the second controller/the third controller.
In some other embodiments, the first controller may also be a ue controller, and when the first controller is the ue controller, the second/third controller is another ue controller in the mobile radio access network except the first controller.
In the specific implementation process, the content network slice information includes: the content identification information, the cache space identification of the content storage, and the path information of the cache space corresponding to the cache space identification are obtained, the corresponding content network slice information is inquired according to the content identification information in the content service request, and the corresponding content network slice information is issued to the second controller/the third controller, and the method further comprises the following steps: positioning a cache space stored by the content according to the path information in the corresponding content network slice information; and reading the content corresponding to the content identification information from the stored cache space, and sending the corresponding content network slice information and the corresponding content to the second controller/the third controller.
Optionally, in some embodiments, referring to fig. 6, the method may further include:
s601: and dividing and configuring the cache space of the content cache corresponding to each controller to obtain a first cache space and a second cache space corresponding to each controller.
S602: and configuring the first cache space as an autonomously managed content cache space, and configuring the second cache space as a controlled managed content cache space, wherein the autonomously managed content cache space is managed by a controller to which the autonomously managed content cache space belongs, and the controlled managed content cache space is controlled and managed based on a corresponding content cache optimization control result when the content network slice is generated.
S603: and generating a controlled content cache management mechanism according to content cache optimization reset result information output by a controller to which the second cache space belongs so as to reset the cached content in the second cache space.
S604: and performing content cache control based on the autonomous content cache management rule on the content of the first cache space according to the autonomous content cache management rule initialized by the system.
The autonomous content caching control mechanism includes a content insertion mechanism and a content removal mechanism, and the content insertion mechanism includes but is not limited to: probabilistic caching and random cache content insertion mechanisms, content removal mechanisms including, but not limited to: LRU and LFU, and a content removal mechanism that periodically removes cached content according to a preset time period.
Optionally, in some embodiments, referring to fig. 7, the method may further include:
s701: and managing the first controller, the second controller, the third controller and the content cache related to the content cache optimization control result corresponding to the content network slice generated when the user terminal controller belongs based on the generated plurality of content network slices.
Optionally, in some embodiments, referring to fig. 8, the receiving, by the first controller, the content service request sent by the second controller/the third controller, querying the corresponding content network slice information according to the content identification information in the content service request, and sending the corresponding content network slice information to the second controller/the third controller includes:
s801: the first controller inquires corresponding content network slice information in a content network slice management module according to the content identification information in the content service request.
S802: the first controller judges whether corresponding content network slice information is inquired; if the query is received, 803 is executed, otherwise, S804 is executed;
s803: and transmitting the corresponding content network slice information to the second controller/the third controller.
S804: and forwarding the content service request to a controller adjacent to the first controller, so that the adjacent controller inquires corresponding content network slice information according to the content identification information in the content service request.
When the first controller is any one of a micro base station level controller, a wireless access point controller, and a user terminal controller, referring to fig. 9, the method further includes:
s8031: and if the corresponding content network slice information is inquired, the corresponding content network slice information is issued to the second controller/the third controller.
S8041: and if the corresponding content network slice information is not inquired, forwarding the content service request to a controller adjacent to the first controller so that the adjacent controller inquires the corresponding content network slice information according to the content identification information in the content service request.
S806: if the adjacent controller does not inquire the corresponding content network slice information, the content service request is forwarded to a superior controller which controls the adjacent controller, so that the superior controller inquires the corresponding content network slice information according to the content identification information in the content service request.
Referring to fig. 10, fig. 10 is a functional structure diagram of a micro base station level controller in an embodiment of the present invention, and the controller completes functions related to content network slice generation control based on a micro base station level, where the functions include a content service request receiving and responding module 101, a micro base station level content network slice management module 102, a communication module 103, a micro base station level content network slice cache optimization control policy module 104, and a micro base station communication resource module 105, where the micro base station level content network slice management module 102 includes: a content network slice searching and recording sub-module 1021, a content network slice synchronizing sub-module 1022, a content cache sub-module 1023, a content updating sub-module 1024, and a content network slice generation control strategy receiving sub-module 1025. The micro base station level content network slice caching optimization control strategy module 104 includes: a control policy output and distribution sub-module 1041, a content network slice control policy sub-module 1042, a control parameter generation sub-module 1043, and a status information acquisition and analysis sub-module 1044, wherein the content network slice control policy sub-module 1042 specifically includes: a static content network slice control policy unit 10421 and a dynamic content network slice control policy unit 10422.
The main functions of each functional module are as follows:
content service request reception and response module 101: the module receives a content service request from a user terminal or a micro base station/wireless access point, extracts content identification information based on the content service request, and sends the content identification information to a content network slice searching and recording submodule 1021 of the micro base station level content network slice management module 102; and sending a content service request search result message of the content service request to the micro base station/wireless access point or the user terminal sending the content service request according to the content network slice search result fed back by the content network slice search and record submodule 1021.
The micro base station level content network slice management module 102: the module completes the functions of recording, updating and searching the content network slice.
The content network slice searching and recording sub-module 1021: the content network slicing information is used for recording all content cached and stored by the content of the micro base station controller; searching corresponding content network slice information according to content identification information extracted from the content service request, wherein the content network slice information comprises but is not limited to content cache resource information and communication resource information corresponding to the content; updating content network slice information according to the content network slice information generated by a macro base station controller or a micro base station level content network slice cache optimization control strategy module of the micro base station; and receiving and updating the content network slice information in the sub-module according to the content network slice synchronization updating maintenance request message from the content network slice generation system manager and the content network slice synchronization updating maintenance request message sent by the content network slice synchronization sub-module 1022 of the macro base station controller or the controller.
The content network slice generation control policy receiving sub-module 1025: the macro base station controller is configured to receive content cache optimization control result information sent by the macro base station controller, output content network slice generation control information and content network slice information according to the optimization control result information, send the content network slice generation control information to the content update submodule 1024 and the micro base station communication resource module 105, and send the content network slice information to the content network slice search and record submodule 1021.
Content update submodule 1024: the content network slice generation control module is used for generating control information according to the content network slice generation control strategy receiving sub-module 1025 or the micro base station level content network slice cache optimization control strategy module 104, controlling the content cache sub-module 1023 to which the micro base station belongs to complete a controlled content cache management mechanism and optimizing and resetting the content cached in the content cache; different autonomous content caching management mechanisms can be executed aiming at different contents according to content caching management rules given by the micro base station level controller, and the content caching management mechanisms comprise a content inserting mechanism and a content removing mechanism. Content insertion mechanisms include, but are not limited to, probabilistic caching, random caching, and the like, and content removal mechanisms include, but are not limited to, LRU, LFU, or cache removal mechanisms that remove content periodically according to time.
The content network slice synchronization sub-module 1022: receiving a content network slice synchronous updating maintenance request message from a macro base station level controller or the controller, sending content network slice information in the message to a content network slice searching and recording submodule 1021, and controlling the content network slice searching and recording submodule 1021 to complete a synchronous updating process of the corresponding content network slice information.
The content cache sub-module 1023: the content updating submodule 1024 is used for generating a controlled content cache management mechanism corresponding to the control information for the content network slice or an autonomous content cache management mechanism given by the micro base station controller to cache the content information. Specifically, control information may be generated according to a content network slice, and cache reset of the specified content is completed, that is, a controlled cache update mechanism is executed; and executing a content caching updating mechanism autonomously controlled by the micro base station level controller on the content information stored in the submodule according to the autonomous content caching management control information of the micro base station level controller.
The communication module 103: and finishing the information interaction of a control plane and a user plane between the micro base station controller and the macro base station controller, between the micro base station and the micro base station/wireless access point, and between the micro base station controller and the user terminal controller.
The micro base station level content network slice cache optimization control policy module 104: the module completes the content network slice caching optimization control strategy based on the micro base station level visual angle, and the functions of each sub-module of the module are as follows:
status information collection and analysis submodule 1044: collecting system state information related to required content network slices, including but not limited to user terminal number information controlled by a micro base station based on the view angle of the micro base station, networking state information between the micro base station and a wireless access point, networking state information between the micro base station and the user terminal, networking state information between the controlled user terminals and use state information of a content cache region of each user terminal controller, analyzing the current communication resource state information, content resource state information and content service request state information of the system, providing the network model type and content service request analysis result of the view angle of the micro base station, and outputting the network parameters and content parameters of the system; and reporting the state information and the analysis result information thereof to the macro base station level controller to which the state information belongs.
The control parameter generation submodule 1043: and generating input control parameters required by the content network slice control strategy sub-module 1042 according to the network parameters and the content parameters output by the state information acquisition and analysis sub-module 1044.
The content network slice control policy sub-module 1042: the sub-module mainly comprises an optimization control algorithm for content network slice generation, and comprises a static content network slice control strategy unit 10421 and a dynamic content network slice control strategy unit 10422.
Static content network slice control policy unit 10421: according to the input control parameters of the control parameter generation submodule 1043, the specific network performance index and/or the user content service quality index are/is used as an optimization target, and the optimization generation process of the content network slice aiming at the specific content is completed based on part of the input control parameters and/or the configuration parameters of the system as the optimization limiting conditions; content network slices of specific content supported by an output system, each content network slice including communication resources and content caching resources that need to be allocated to the content.
Dynamic content network slicing control policy unit 10422: according to the content service request of the user, the input parameters of the control parameter generation submodule 1043 are generated according to the content service request of the user, based on the specific network performance index and/or the user content service quality index, and based on part of the input control parameters and/or the configuration parameters of the system as the optimized limiting conditions, the cache optimization placement decision based on the content is carried out, the optimized generation of the content network slice aiming at the single content is completed, and the optimized control result information of the content cache resource and the communication resource based on the content is output.
The control policy output and distribution submodule 1041: the content network slice control policy sub-module 1042 receives the optimization control result information of the content cache resource and the communication resource outputted by the content network slice control policy sub-module, generates content network slice information and content network slice generation control information based on a single content, and distributes the content network slice information and the content network slice generation control information to the micro base station level controller, the wireless access point controller and the user terminal controller related to the optimization control result.
Micro base station communication resource module 105: the module receives the content network slice generation control information of the control strategy output and distribution submodule, provides communication resources corresponding to the content network slice for the content service according to the information, and mainly comprises communication resources between a user and a micro base station, communication resources between a macro base station and the micro base station and communication resources between the micro base station and a micro base station/wireless access point.
Referring to fig. 11, fig. 11 is a schematic functional structure diagram of a wireless access point controller according to an embodiment of the present invention. The controller completes the control function related to the generation of the content network slice based on the visual angle of the wireless access point, and comprises the following steps: a content service request receiving and responding module 111, a content network slice management module 112, a communication module 113, a wireless access point content network slice cache optimization control policy module 114, and a wireless access point communication resource module 115. The content network slice management module 112 specifically includes: a content network slice searching and recording sub-module 1121, a content network slice synchronizing sub-module 1122, a content cache sub-module 1123, a content updating sub-module 1124 and a content network slice generation control strategy receiving sub-module 1125; the wireless access point content network slice caching optimization control policy module 114 may specifically include: a control strategy output and distribution sub-module 1141, a content network slicing control strategy sub-module 1142, a control parameter generation sub-module 1143, and a status information acquisition and analysis sub-module 1144, wherein the content network slicing control strategy sub-module 1142 includes: a static content network slicing control policy unit 11421 and a dynamic content network slicing control policy unit 11422.
The main functions of each functional module are as follows:
content service request reception and response module 111: the module receives a content service request from a user terminal or a micro base station/wireless access point, extracts content identification information based on the content service request, and sends the content identification information to a content network slice searching and recording sub-module 1121 of the content network slice management module 112; and sending a content service request search result message of the content service request to the micro base station/wireless access point or the user terminal sending the content service request according to the content network slice search result fed back by the content network slice search and record sub-module 1121.
Content network slice management module 112: the module completes the functions of recording, updating and searching the content network slice.
The content network slice searching and recording sub-module 1121: the content network slice information is used for recording all contents stored in the content cache of the wireless access point; searching corresponding content network slice information according to content identification information extracted from the content service request, wherein the content network slice information comprises but is not limited to content cache resource information and communication resource information corresponding to the content; updating content network slice information according to content network slice information generated by a macro base station level controller or a wireless access point content network slice cache optimization control strategy module 114 of the wireless access point; and receiving and updating the content network slice information in the submodule according to the content network slice synchronous updating maintenance request message from the content network slice generation system manager and the content network slice synchronous updating maintenance request message sent by the macro base station level controller or the content network slice synchronous submodule of the controller.
The content network slice generation control policy receiving sub-module 1125: and the content network slice searching and recording submodule 1121 is configured to receive content cache optimization control result information sent by the macro base station controller, output content network slice generation control information and content network slice information according to the optimization control result information, send the content network slice generation control information to the content updating submodule 1124, and send the content network slice information to the content network slice searching and recording submodule 1121.
The content update sub-module 1124: the content network slice generation control module is used for controlling the content cache submodule 1123 to which the wireless access point belongs to complete a controlled content cache management mechanism according to the content network slice generation control information from the content network slice generation control strategy receiving submodule 1125 or the wireless access point content network slice cache optimization control strategy module 114, and performing optimization resetting on the content cached in the content cache; different autonomous content caching management mechanisms, including a content insertion mechanism and a content removal mechanism, may also be implemented for different content according to content caching management rules given by the present radio access point controller. Content insertion mechanisms include, but are not limited to, probabilistic caching, random caching, and the like, and content removal mechanisms include, but are not limited to, LRU, LFU, or cache removal mechanisms that remove content periodically according to time.
Content network slice synchronization submodule 1122: receiving a content network slice synchronous updating maintenance request message from a macro base station level controller or the controller, sending content network slice information in the message to the content network slice searching and recording sub-module 1121, and controlling the content network slice searching and recording sub-module 1121 to complete a synchronous updating process of the corresponding content network slice information.
Content cache submodule 1123: a controlled content caching management mechanism for generating control information for content network slices based on the content update sub-module 1124 or an autonomous content caching management mechanism given by the present radio access point controller caches the content information. Specifically, control information may be generated according to a content network slice, and cache reset of the specified content is completed, that is, a controlled cache update mechanism is executed; and executing a content caching updating mechanism which is autonomously controlled by the wireless access point controller on the content information stored in the submodule according to the autonomous content caching management control information of the wireless access point controller.
The communication module 113: the method is used for finishing the information interaction of a control plane and a user plane between the wireless access point controller and the macro base station level controller, between the wireless access point and the micro base station/wireless access point, and between the wireless access point controller and the user terminal controller.
The wireless access point content network slice caching optimization control policy module 114: the module completes the content network slice caching optimization control strategy based on the view angle of the wireless access point controller. Wherein, the function of each submodule is as follows:
status information collection and analysis submodule 1144: collecting system state information related to a required content network slice, including but not limited to user terminal number information controlled by a wireless access point based on a view angle of a wireless access point controller, networking state information between the wireless access points/micro base stations, networking state information between the wireless access points and the user terminals, networking state information between the controlled user terminals and use state information of content cache of each user terminal controller, analyzing current communication resource state information, content resource state information and content service request state information of the system, providing a network model type of the view angle of the wireless access point controller, a content service request analysis result, and outputting network parameters and content parameters of the system; and reporting the state information and the analysis result information thereof to the macro base station level controller to which the state information belongs.
Control parameter generation submodule 1143: and generating input control parameters required by the content network slice control strategy submodule 1142 according to the network parameters and the content parameters output by the state information acquisition and analysis submodule 1144.
The content network slice control policy sub-module 1142: the sub-module mainly comprises an optimization control algorithm during content network slice generation, and comprises a static content network slice control strategy unit 11421 and a dynamic content network slice control strategy unit 11422.
Static content network slice control policy unit 11421: generating input control parameters of the sub-module according to the control parameters, taking specific network performance indexes and/or user content service quality indexes as optimization targets, and finishing the optimization generation process of the content network slices aiming at specific contents based on part of the input control parameters and/or system configuration parameters as optimization limiting conditions; and outputting the corresponding content network slice of the specific content, and outputting the optimization control result information of the content cache resource and the communication resource based on the specific content.
Dynamic content network slicing control policy unit 11422: according to the content service request of the user, according to the input parameters of the control parameter generation submodule 1143, based on the specific network performance index and/or the user content service quality index as the optimization target, based on part of the input control parameters and/or the system configuration parameters as the optimization limiting conditions, the cache optimization placement decision based on the content is carried out, the content network slice optimization generation aiming at the single content is completed, and the optimization control result information of the content cache resource and the communication resource based on the content is output.
The control policy output and distribution sub-module 1141: receiving the optimized control result information of the content cache resource and the communication resource output by the content network slice control strategy sub-module 1142, generating content network slice information and content network slice generation control information based on the content, and distributing the content network slice information and the content network slice generation control information to the micro base station level controller, the wireless access point controller and the user terminal controller related to the optimized control result.
Wireless access point communication resource module 115: the module receives the content network slice generation control information of the control strategy output and distribution submodule 1141, and provides the communication resources corresponding to the content network slice according to the information, mainly including the communication resources between the wireless access point and the macro base station, between the wireless access point and the micro base station/wireless access point, and between the wireless access point and the user.
Referring to fig. 12, fig. 12 is a schematic diagram of a functional structure of a user terminal controller according to an embodiment of the present invention. The user terminal controller mainly completes the control functions related to the content network slices, such as the acquisition and analysis of state information, the acquisition of content, the search, the synchronization and the management of the content network slices, the optimized reset of cache content based on the optimized control result of the content network slices and the like of the user terminal based on the view angle of the user terminal controller. The controller comprises a message generating and receiving module 121, a content obtaining module 122, a user terminal content network slice management module 123, a communication module 124, a state information collecting and analyzing module 125 and a user terminal communication resource module 126, wherein the user terminal content network slice management module 123 specifically comprises: a content network slice searching and recording sub-module 1231, a content network slice synchronizing sub-module 1232, a content caching sub-module 1233, a content updating sub-module 1234, and a content network slice generation control strategy receiving sub-module 1235.
The main functions of each functional submodule are as follows:
the state information collection and analysis module 125: collecting state information related to a system generated content network slice in a user terminal, wherein the information comprises but is not limited to position information of the user terminal and content cache use state information of the user terminal, networking state information between the user terminal and a micro base station/wireless access point of the user terminal, networking state information of the user terminal and adjacent user terminals of the user terminal and the like, and reporting the state information and analysis result information of the state information to a micro base station controller/wireless access point controller of the user terminal.
The message generating and receiving module 121: generating a corresponding content service request message according to the content information which the user wants to obtain; content service request information from its neighbor user terminals is received.
The content acquisition module 122: the module searches and records the content network slice information in the sub-module 1231 according to the content network slice, and obtains the content information requested by the user terminal in the corresponding content cache in the system.
The user terminal content network slice management module 123: the module completes the functions of recording, updating and searching the content network slice information.
The content network slice generation control policy receiving sub-module 1235: the content network slice searching and recording submodule 1231 is configured to receive content cache optimization control result information from the micro base station controller/the radio access point controller, generate content network slice generation control information and content network slice information, send the content network slice generation control information to the content updating submodule 1234 and the user terminal communication resource module 126, and send the content network slice information to the content network slice searching and recording submodule.
The content update sub-module 1234: the content network slice generation control information sent by the content network slice generation control strategy receiving submodule is received, a controlled content updating mechanism is completed according to the information, the content caching submodule 1233 is controlled to update the cached content, and the content updating of the content caching submodule 1233 is completed by receiving the content caching updating rule which is given by the controller and is controlled autonomously.
The content network slice searching and recording sub-module 1231: the module is used for recording, searching and updating the content network slice information. Specifically, content network slice information in the user terminal is recorded; according to the content identification information extracted from the received content service request, searching corresponding content network slice information in the module, wherein the content network slice information comprises but is not limited to content cache resource information and communication resource information; updating the content network slice information of corresponding content in the module according to the content network slice information generated by the content network slice cache optimization control strategy module from the micro base station level controller/wireless access point controller to which the module belongs; and updating the content network slice information in the module according to the content network slice synchronous updating maintenance request message from the micro base station level controller/wireless access point controller to which the micro base station level controller/wireless access point controller belongs.
Content network slice synchronization sub-module 1232: and according to the received content network slice synchronous updating maintenance request message from the micro base station controller/wireless access point controller, completing the synchronous updating process of the content network slice information of the content network slice searching and recording submodule 1231 in the user terminal.
Content cache submodule 1233: used for caching the content information of the user terminal. Specifically, content caching operation information corresponding to the control information is received and generated according to the content network slice from the content updating submodule 1234, and caching optimization resetting of the specified content is completed; the content information of the module is autonomously updated by receiving an autonomously controlled content cache update rule of the content update sub-module 1234, where the content update mechanism includes a content insertion mechanism and a content removal mechanism, where the content insertion mechanism includes, but is not limited to, a probabilistic cache, a random cache, and the like, and the content removal mechanism includes, but is not limited to, an LRU, an LFU, or a content removal mechanism that removes cached content according to a time periodicity.
The communication module 124: the method is used for finishing the information interaction of the control plane and the user plane between the user terminal controller and the micro base station controller/wireless access point controller to which the user terminal controller belongs and the user terminal of the user terminal and the neighbor user terminal.
User terminal communication resource module 126: the content network slice generation information from the content network slice generation control policy receiving sub-module 1235 is received by the communication module 124, and communication resources corresponding to the content network slice are provided for the content information based on the content network slice generation information, including but not limited to communication resources between the ue and the micro base station/wireless access point, communication resources between the ue and the macro base station, and communication resources between the ue and the ue.
In another aspect of the embodiments of the present invention, the content service-oriented mobile radio access network content network slice generation system manager is mainly used to complete the maintenance management related to the content network slice in the system, and may include the following functions:
(a) the initialization process is that the initialization parameter setting of the system is completed, which mainly comprises the initialization setting of the parameters needed to be input by the system, the supported user service quality indexes and the network performance indexes related to the content service;
(b) control mode configuration procedure: completing the configuration of a control mode of the system, which mainly comprises the configuration process of a content service-oriented static mobile wireless access network content network slice generation mode and a dynamic mobile wireless access network content network slice generation mode;
(c) The configuration process of the content cache control mode comprises the following steps: completing management mechanism mode selection and parameter configuration processes for deployed content cache in the system, wherein the management mechanism mode selection and parameter configuration processes mainly comprise a control mode selection process of a controlled content cache management mechanism and a control mode selection process of an autonomous content cache management mechanism;
(d) the synchronous updating process of the content network slice information comprises the following steps: and completing the synchronous updating process of all content network slice information in the system. The content network slicing information refers to information about an optimal manner for acquiring a specific content in a system, and includes, but is not limited to, an identification number of the content, an identification of a content cache sub-module in which the content is stored, and an optimal path to the content cache sub-module, where the optimal path refers to a path when a user terminal acquires the content, and the optimal path may be selected according to different optimization targets, for example, if a minimum cost for the user terminal to acquire the content is taken as an optimization target, the optimal path may be ordered according to an order of local acquisition, neighbor user terminal acquisition, acquisition from a micro base station to which the user terminal is connected, and acquisition from a macro base station through the micro base station to which the user terminal is connected.
In the embodiment of the present invention, on the user plane, the view based on the functional entity may include a communication plane and a content cache plane.
In the system, the functional entities related to the communication plane include communication functional entities of a macro base station, a micro base station, a wireless access point and a user terminal, as well as a bidirectional communication link between the macro base station and the micro base station/the wireless access point, a bidirectional communication link between the micro base station/the wireless access point and the user terminal, and a bidirectional communication link between the user terminal and the user terminal. The two-way communication link between the macro base station and the micro base station/wireless access point, and the two-way communication link between the micro base station and the micro base station/wireless access point may be a wireless communication link or a wired communication link.
And on the content cache plane, the content cache is deployed on a macro base station, a micro base station, a wireless access point and a user terminal.
In the present system, the content cache supports content cache management mechanisms, including a content insertion mechanism and a content removal mechanism, wherein the content insertion mechanism is further divided into a controlled content insertion mechanism and an autonomous content insertion mechanism, and the content removal mechanism is further divided into a controlled content removal mechanism and an autonomous content removal mechanism.
The controlled content insertion and controlled content removal mechanism refers to the content cache optimization resetting performed by the content cache aiming at a specific cache unit and specific content of the content cache according to the content cache optimization control result of the controller to which the content cache belongs, namely, the part of content cache unit is controlled to optimally place the content and is not influenced by content insertion mechanisms such as random insertion and probability insertion and content removal mechanisms such as LFU and LRU.
The autonomous content insertion mechanism and the autonomous content removal mechanism refer to a mechanism that a local content cache is controlled by a controller to which the local content cache belongs, and the cached content can be updated according to a content insertion mechanism such as random insertion and probability insertion and a content removal mechanism such as an LFU and an LRU which are usually supported by the content cache.
Based on the two types of content cache updating mechanisms, the embodiment of the invention can set the cache space of each content cache in the system into two parts, wherein one part is the part that the content cache is controlled by the controller to which the content cache belongs, and the part that the user equipment can autonomously manage the cached content is called as the autonomously managed content cache; the other part is controlled by a controller of a content network slice optimization generation system facing content services, and the user equipment cannot autonomously control content caching for content updating, which is called controlled management content caching, specifically, controlled management content caching refers to content insertion and content removal of the content caching of the part is only controlled by content resource allocation when the system generates content network slices, and content caching for corresponding content caching optimization resetting is completed only according to content network slice generation control information.
Correspondingly, in some embodiments of the present invention, referring to fig. 13, the method may further include:
s131: and the first controller receives the content network slice synchronous updating maintenance request message sent by the second controller/the third controller, and synchronously updates the content network slice information corresponding to the content network slice synchronous updating maintenance request message according to the content identification information in the synchronous updating maintenance request message.
For a specific example of the execution process, refer to the above embodiments, and are not described herein again.
As an example, the information interaction process between the functional entities in the system is explained below through a content network slice information query process of a content service request from a user terminal and a mobile radio access network-based content network slice generation process for the content service request in the system.
In the network scenario shown in fig. 2, when the user equipment S1 issues a content service request, the system will trigger a search process for content network slice information corresponding to the content based on the request, and after the search process is finished, the system will complete the content network slice generation and content network slice update process in the mobile wireless access network based on the search result of this time. Specifically, the above process includes the steps of:
Step 1: the user terminal controller of S1 generates a content service request message in the message generating and receiving module according to the operation of the user request content, extracts the content identification information, and sends the content identification information to the user terminal content network slice management module of S1; s1, the management module of the user terminal searches the content network slice searching and recording sub-module for the content network slice information corresponding to the content, if the content network slice information is found, the content network slice searching and recording sub-module sends a content searching success message to the message generating and receiving module, and ends the content searching, and executes the step 7-1-1; if the content network slice information is not found, step 2 is performed.
Step 2: s1 sends the request message of content service to the message generating and receiving module of its neighbor user terminal through communication module; the message generating and receiving module of the neighbor user terminal receives the content service request, extracts the content identification information and sends the content identification information to the content network slice management module of the user terminal; the content network slice management module of the neighbor user terminal searches the content network slice information based on the content in the content network slice searching and recording submodule thereof, and simultaneously sends a content searching response message to the message generating and receiving module of S1; if the neighbor user terminals all find the content network slice information, S1 selects one user terminal, and the user terminal feeds back the content network slice information to S1 according to the original path, and the step 7-1-2 is executed after the content information search is finished; if none of the neighboring user terminals of S1 finds the content network slice information, all send a content finding failure message to S1, and at the same time, S1 performs step 3.
And step 3: s1 selecting the user terminal of the user equipment S2 with the highest value in the neighbor user terminals based on the networking state information between the neighbor user terminals which are currently in communication association with the user terminal, S1 sending a content service request message to S2; the message generating and receiving module of S2 receives the content service request, S2 sends the content service request message to the neighbor user terminal associated with it; the message generating and receiving module of the neighbor user terminal of S2 receives the content service request, extracts the content identification information, sends the content identification information to the content network slice searching and recording submodule of the content network slice management module of the user terminal, the content network slice searching and recording submodule searches the content network slice information corresponding to the content, and sends the content searching response message to S2; if the neighbor user terminal of S2 finds the content network slice information, S2 selects one of the user terminals, and the user terminal feeds back the content network slice information to S2 through the communication module according to the original path, and then S2 feeds back the content network slice information to S1, and the content search is finished, and step 7-1-2 is executed; if the neighbor user terminal of S2 does not find the content network slice information, the neighbor user terminal of S2 feeds back a content search failure message to S2, and when all the neighbor user terminals of S2 do not find the content network slice information, S2 feeds back a content search failure message to S1, where the message contains an identifier that S2 cannot find the content at the user level, S1 executes step 4.
And 4, step 4: if the user terminal S1 receives the content search failure message sent in S2 that cannot find the identifier of the content at the user level, indicating that the content service request cannot be satisfied at the current user level of the system, the user terminal S1 sends the content service request message to the connected micro base station controller/wireless access point controller (SBS1/AP 1). The content service request receiving and responding module of the SBS1/AP1 receives the content service request message, extracts content identification information, sends the content identification information to a content network slice searching and recording submodule of a content network slice management module of a micro base station controller/wireless access point controller of the SBS1/AP1, the content network slice searching and recording submodule searches content network slice information corresponding to the content, if the content network slice information is searched, the SBS1/AP1 sends a content searching success message to S1, the content searching is finished, and the step 7-2 is executed; if the SBS1/AP1 does not find the content network slice information, step 5 is performed.
And 5: the micro base station controller/wireless access point controller of SBS1/AP1 sends the content service request message to the content service request receiving and responding module of the neighbor SBS/AP of SBS1/AP1, the content service request receiving and responding module extracts the content identification information and sends the content identification information to the content network slice searching and recording submodule of the content network slice management module of its micro base station/wireless access point, the content network slice searching and recording submodule searches the content network slice information corresponding to the content and sends the content searching responding message to the SBS1/AP1 controller, if the plurality of SBS/APs find the content network slice information, the SBS1/AP1 selects one SBS/AP, the content network slice information is fed back to the SBS1/AP1, the content search is finished, and the step 7-2 is executed; if none of the neighboring SBS/APs of the SBS1/AP1 found the content network slice information, the SBS/APs all send a content search failure message to the controller of the SBS1/AP1, and perform step 6.
Step 6: the controller of the SBS1/AP1 receives the content search failure message fed back by each SBS/AP, and indicates that the content service request cannot be satisfied at the current micro base station level of the system, then the SBS1/AP1 sends the content service request of S1 to the macro base station controller connected thereto, the content service request receiving and responding module in the macro base station controller receives the content service request, extracts the content identification information, and sends the content identification information to the content network slice search and recording sub-module of the macro base station content network slice management module, the content network slice search and recording sub-module searches for the content network slice information corresponding to the content, and sends the content network slice information to the SBS1/AP1, and after the content search is finished, step 7-3 is executed.
Step 7-1-1: the content network slice searching and recording submodule of the user terminal controller S1 sends the searched content network slice information to the content obtaining module through the communication module, the content obtaining module obtains the content information from the content cache submodule in the user terminal content network slice management module according to the content network slice information, after the content information is obtained, the content obtaining module sends the content synchronous updating information to the content network slice synchronization submodule in the user terminal content network slice management module, and the content network slice synchronization submodule sends the content network slice synchronous updating maintenance request message based on the content to the connected micro base station controller/wireless access point controller; step 8 is performed.
Step 7-1-2: s1, the content network slice searching and recording sub-module of the user terminal controller receives the content network slice information fed back by the neighbor user terminal through the communication module, sends the content network slice information to the content obtaining module, and simultaneously stores or updates the content network slice information based on the content in the content network slice searching and recording sub-module; the content obtaining module of the user terminal controller of S1 obtains the content information according to the content network slice information; after the content information is acquired, the content acquisition module sends content synchronous updating information to a content network slice synchronization submodule in a user terminal content network slice management module, and the content network slice synchronization submodule sends a content network slice synchronous updating maintenance request message based on the content to a micro base station controller/wireless access point controller; step 8 is performed.
Step 7-2: the dynamic content network slice optimization control strategy unit in the micro base station controller/wireless access point controller of SBS1/AP1 completes the content network slice optimization generation process based on the communication resource for acquiring the content information and the content cache resource identification information for storing the content information according to the search result of the content network slice information, and outputs the content cache optimization control result information when the content network slice of the content is generated to the control strategy output and distribution submodule; the control strategy output and distribution submodule outputs content network slice generation control information to a micro base station controller/wireless access point controller and a user terminal controller related to an optimization control result according to the content cache optimization control result information, and the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the current optimization control result completes cache content optimization resetting and communication resource distribution based on the content network slice generation control information; meanwhile, the control strategy output and distribution submodule of the micro base station controller/wireless access point controller outputs the content network slice information of the content to the content network slice searching and recording submodule and the user terminal S1, the content network slice information contains content cache resource information and communication resource information which need to be distributed aiming at the content system, and the mode of obtaining the content information; and the content network slice searching and recording submodule of the micro base station controller/the wireless access point controller records and updates corresponding content network slice information.
S1, the content network slice generation control strategy receiving sub-module of the user terminal controller receives the content network slice information from the micro base station controller through the communication module of the user terminal, and sends the information to the content obtaining module, and the content obtaining module obtains the corresponding content information according to the content network slice information; after the content is acquired, the content acquisition module of the user terminal S1 sends content network slice updating and maintaining request information to the content network slice synchronization submodule in the user terminal content network slice management module, and the content network slice synchronization submodule of the user terminal sends a content network slice synchronization updating and maintaining request message based on the content to the content network slice synchronization submodule of the micro base station controller/wireless access point controller; a content network slice synchronization submodule of a micro base station controller/a wireless access point controller receives a content network slice synchronization updating and maintaining request message, and sends the content network slice synchronization updating and maintaining request message based on the content to a content network slice generation system manager, wherein the message contains an ID of the dynamic content network slice optimization generation process, optimized content identification information and content network slice information corresponding to the content after optimization; step 8 is performed.
And 7-3: the macro base station controller starts a dynamic content network slice control strategy unit thereof based on the communication resource identification information of the content information and the content cache resource identification information stored with the content information according to the search result of the content information, completes the content network slice optimization generation process of the mobile wireless access network aiming at the content service request, and outputs the content cache optimization control result during the content network slice optimization generation to a control strategy output and distribution submodule; the control strategy output and distribution submodule generates content network slice generation control information and content network slice information based on the content cache optimization control result information; the control strategy output and distribution submodule sends the content network slice generation control information to a micro base station and/or a wireless access point controller and/or a user terminal controller related to the current optimization control result, and the micro base station and/or the wireless access point controller and/or the user terminal controller related to the current optimization control result completes cache content optimization resetting and communication resource allocation based on the content network slice generation control information; the control strategy output and distribution submodule feeds back the content network slice information to the user terminal S1 through the communication module; the control strategy output and distribution submodule sends the content network slice information to a content network slice searching and recording submodule of the macro base station, and the content network slice searching and recording submodule updates the content network slice information of the content.
S1, the content network slice generation control strategy receiving submodule of the user terminal controller receives the content network slice information and sends the content network slice information to the content obtaining module, and the content obtaining module obtains the content information according to the content network slice information; after the content information is acquired, the content acquisition module of the user terminal S1 sends content network slice updating and maintaining request information to the content network slice synchronization submodule in the user terminal content network slice management module, and the content network slice synchronization submodule of the user terminal S1 sends content network slice synchronization updating and maintaining request information based on the content to the content network slice synchronization submodule of the micro base station controller/wireless access point controller; the content network slice synchronization submodule of the micro base station controller/radio access point controller receives the content network slice synchronization update maintenance request message from the user terminal S1, merging the corresponding content cache optimization control process when the content network slices are generated, sending the merged content network slice synchronous updating maintenance request message to the macro base station controller to which the merged content network slices belong, merging the corresponding content cache optimization control process when the content network slices are generated by the macro base station controller, sending the merged content network slice synchronous updating maintenance request message to the content network slice generation system manager, the message includes but is not limited to the ID of the current dynamic content network slice generation process based on the view angle of the macro base station controller, the corresponding content identification information and the content network slice information corresponding to the optimized content; step 8 is performed.
And 8: and ending the synchronous updating process of the content network slice generation and the content network slice.
In a content network slice generation system of a mobile wireless access network facing a content service, an optimization generation method of a content service request for a user and a dynamic content network slice based on a specific content network slice can be supported, and an optimization target based on a network as a center and an optimization generation method of a static content network slice based on all contents or part of contents can be supported, for example, the optimization of flow on a specific link, load balancing between cells, reduction of content service requests from a micro base station/a wireless access point to a macro base station and the like can be selected as optimization targets, and resource allocation corresponding to the content network slices of all contents or part of contents in the system can be optimized.
Optionally, in some embodiments, referring to fig. 14, the first controller determines whether a system performance index indicated by the acquired state information reaches a preset threshold according to the corresponding control parameter, and when the system performance index does not reach the preset threshold, triggers generation of a mobile radio access network content network slice by using a static content network slice optimization generation method.
Generating a mobile wireless access network content network slice by adopting a static content network slice optimization generation method according to the corresponding control parameters, wherein the method comprises the following steps:
s141: and determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance.
S142: and according to the optimization target and the corresponding preset threshold value, performing content network slicing on all or part of the content cached in the mobile wireless access network based on the target network performance index and/or the user content service quality index to obtain a plurality of content network slices.
Wherein, the optimization objectives include but are not limited to: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes but is not limited to: the method comprises the steps of setting a preset threshold corresponding to the bandwidth of a communication link, setting a preset threshold corresponding to the maximum hop count of content access, and setting a preset threshold corresponding to the cost value of the acquired content.
Optionally, in some embodiments, referring to fig. 15, generating a content network slice in a mobile radio access network by using a dynamic content network slice optimization generation method according to a corresponding control parameter includes:
S151: and receiving the content service request to which the content service request state information belongs to obtain the requested content information identifier.
S152: and determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance.
S153: and generating a content network slice of the content for the content requested in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold, and obtaining a single content network slice based on the content.
Wherein the optimization objectives include, but are not limited to: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes but is not limited to: the method comprises the steps of setting a preset threshold corresponding to the bandwidth of a communication link, setting a preset threshold corresponding to the maximum hop count of content access, and setting a preset threshold corresponding to the cost value of the acquired content.
As an example, the following provides implementation methods for generating a content network slice of a mobile radio access network by using a static content network slice optimization generation method and generating a content network slice of a mobile radio access network by using a dynamic content network slice optimization generation method, respectively, and this is not limited in this respect.
It can be understood that, because two content network slice optimization generation methods are completed based on the system information collection and analysis, and at the same time, after the system completes one content network slice optimization generation method, the system will cause the number of content copies corresponding to the content network slices in the system to change due to the mobility of the user terminal and the management mechanism of the content caches at all levels, thereby affecting the content resources of the content network slices of the system and finally affecting the system performance indexes related to the content in the system.
The information acquisition and analysis process of the system in the embodiment of the invention can specifically comprise an information acquisition and analysis process in a macro base station controller, an information acquisition and analysis process in a micro base station controller, an information acquisition and analysis process in a wireless access point controller and an information acquisition and analysis process in a user terminal controller.
(1) Information collection and analysis process in macro base station controller
S161: and an information acquisition and analysis module in the macro base station controller acquires and monitors the state information of the system.
The state information mainly comprises state information related to content and communication resource state information, wherein the state information related to the content comprises but is not limited to content service request load information, hit rate information of a content service request, content popularity information in a system, content cache use state information to which a macro base station controller belongs, and content network slice synchronous erasing information reported after a user terminal erases a specific content copy in a content cache due to executing an autonomous cache management mechanism, and the communication resource state information comprises but is not limited to load balancing state information among cells to which the macro base station belongs, link load state information/link load state information related to the content from a micro base station/a wireless access point to a macro base station, link load state information/link load state information related to the content from the micro base station/the wireless access point, and network connection topology information between macro base stations, micro base stations/wireless access points in the system, and the like.
S162: the information collection and analysis module analyzes the collected content-related status information and communication resource status information.
S163: and judging whether the performance index and/or the network performance index related to the content in the system meet the preset threshold value requirement.
If the threshold requirement is not met, executing S161, and the information acquisition and analysis module continues to acquire and monitor the system state information; if the threshold requirement is met, S164 is performed.
S164: and starting a static content network slice optimization control strategy unit in the macro base station controller to optimize all content or partial content network slices of the system.
Referring to fig. 16, fig. 16 is a schematic view of an information collection and analysis flow of a macro base station level controller in the embodiment of the present invention.
(2) Information collection and analysis process in micro base station controller.
S171: and an information acquisition and analysis module in the micro base station controller acquires and monitors the state information of the system.
The state information mainly includes state information and communication resource state information related to the content, where the state information related to the content includes, but is not limited to, content service request load information of the micro base station, hit rate information of the content service request, content popularity information in the system, content cache use state information to which the micro base station controller belongs, content network slice synchronous erasure message reported to the micro base station controller after a user terminal erases a specific content copy in its content cache due to executing an autonomous cache management mechanism, and the communication resource state information includes, but is not limited to, load state information of a link between the micro base station and the macro base station/link load state information related to the content, link load state information between the micro base station and other micro base stations/wireless access points/link load state information related to the content, Link load state information between the micro base station and the user/link load state information related to the content, network connection topology information related to the micro base station, connection topology information between user terminals to which the micro base station belongs, and the like.
S172: it is determined whether or not the state information of the system has changed, and if not, S171 is executed, and if yes, S173 is executed.
S173: and the information acquisition and analysis module sends the changed state information of the system to the macro base station.
The information acquisition and analysis module analyzes the collected content resource state information and the communication resource state information and reports the changed state information to the macro base station controller in real time.
Referring to fig. 17, fig. 17 is a schematic diagram of an information collection and analysis flow of the micro base station controller according to an embodiment of the present invention.
(3) Information collection and analysis processes in a wireless access point controller.
S181: and an information acquisition and analysis module in the wireless access point controller acquires and monitors the state information of the system.
The state information mainly includes state information related to content, communication resource state information, wherein the state information related to content includes, but is not limited to, content service request load information, hit rate information of content service request, content popularity information in the system, content cache usage state information to which the wireless access point controller belongs, content copy erasure information reported after a user terminal erases a specific content copy in its content cache due to executing an autonomous cache management mechanism, and the communication resource state information includes, but is not limited to, load state information of a link between a wireless access point and a macro base station, link load state information between the wireless access point and the wireless access point/the micro base station/link load state information related to content, link load state information between the wireless access point and the user/link load state information related to content, and the like, Network connection topology information related to the wireless access point, connection topology information of a user to which the wireless access point belongs, and the like.
S182: and judging whether the state information of the system changes or not, if not, executing S181, and if so, executing S183.
S183: and the information acquisition and analysis module sends the changed state information of the system to the macro base station.
The information acquisition and analysis module analyzes the collected content resource state information and the communication resource state information and reports the changed state information to the macro base station controller in real time.
Referring to fig. 18, fig. 18 is a schematic view illustrating an information collecting and analyzing process of the wireless access point controller according to an embodiment of the present invention.
(4) Information collection and analysis process in the user terminal controller.
S191: an information acquisition and analysis module in the user terminal controller acquires and monitors system state information of the user terminal.
The system state information of the user terminal comprises communication resource state information and state information related to content, wherein the communication resource state information comprises but is not limited to wireless signal strength information between the user terminal and a micro base station/wireless access point to which the user terminal belongs, connection state and connection topology information between the user terminals, and the state information related to the content comprises but is not limited to content request information sent and received by the user terminal, content cache use state information to which a controller of the user terminal belongs, popularity of the content and the like.
S192: and judging whether the system state information changes or not, if not, executing S191, and if so, executing S193.
S193: and the user terminal controller reports the changed system state information to the micro base station controller/wireless access point controller to which the user terminal controller belongs.
The information acquisition and analysis module analyzes the state information and reports the changed system state information to the micro base station controller/wireless access point controller to which the system state information belongs in real time.
Referring to fig. 19, fig. 19 is a schematic view illustrating an information collecting and analyzing process of the user terminal controller according to an embodiment of the present invention.
In the embodiment of the invention, the macro base station controller completes the method for optimally generating the static content network slices aiming at all contents in the system, and the micro base station controller completes the method for optimally generating the static content network slices aiming at specific contents in the system.
The steps of the method for optimally generating the static content network slice in the macro base station controller and the micro base station controller are respectively given below.
As an example, referring to fig. 20, fig. 20 is a flowchart illustrating a static content network slice generation method of a macro base station controller according to an embodiment of the present invention.
S201: and the information acquisition and analysis submodule of the macro base station controller receives the system state change information reported by the micro base station controller and provides the specific performance index of the system after the system state change information is given.
The system state change information includes but is not limited to content-related state information and communication resource state information, wherein the content-related state information includes but is not limited to change information of a specific content copy caused by user mobility or autonomous content removal by a user terminal, and the communication resource state information includes but is not limited to content load state information of a specific link in the system and load state information of the specific link; and the information acquisition and analysis submodule analyzes and provides the specific performance index of the system after the state change information of the system is given.
S202: and judging whether the specific performance index reaches a preset threshold value, if so, executing S201, otherwise, starting a static content network slice optimization generation process, and executing S203.
S203: and an information acquisition module of the macro base station controller acquires state information of the system and outputs network parameters and content parameters to the control parameter generation submodule.
In a specific execution process, acquiring the number of micro base stations/wireless access points and networking states thereof, the number of user terminals, networking states among user terminal devices, and use state information of each content cache of a content cache network in a system, and outputting network parameters of a current network of the system and content parameters of the content cache network to a control parameter generation submodule, wherein the network parameters include but are not limited to networking topological graphs among nodes such as a macro base station, the micro base stations, the wireless access points, the user terminals and the like, degrees of each node and central betweenness; the content parameters include, but are not limited to, Zip parameters, arrival rate of content service requests, number of contents, capacity of content cache, etc.
S204: and the control parameter generation submodule selects and outputs a specific performance index and an optimization limiting condition according to the system state.
In a specific execution process, the control parameter generation submodule selects a specific performance index as an optimization target of the current static content network slice optimization generation process according to system state information, network parameters and content parameters output by the state information acquisition and analysis module, and selects a part of system state information and/or a preset threshold corresponding to the state information as an optimization limiting condition during the current content network slice optimization generation, wherein the optimization target includes but is not limited to a content service request hit rate of each content at a user level, a resource usage amount of a specific communication link/a resource usage amount related to the content, a resource usage amount of the specific communication link/a resource usage amount related to the content, and an access delay of the content, and the corresponding preset threshold includes but is not limited to: the method comprises the steps of setting a preset threshold corresponding to the bandwidth of a communication link, setting a preset threshold corresponding to the maximum hop count of content access, and setting a preset threshold corresponding to the cost value of the acquired content. The bandwidth limitation of the communication link includes, but is not limited to, load balancing state threshold information related to load/content between cells to which the macro base station belongs, link bandwidth threshold/load/content related load state threshold information of a forward link between the micro base station and the macro base station, and link bandwidth threshold/load/content related load state threshold information between the micro base stations.
S205: the static content network slice optimization control strategy unit converts the content network slice optimization generation problem into a cache content placement optimization problem aiming at all contents in the system and based on a specific optimization target and a specific optimization limiting condition, completes optimization based on the optimization problem, and outputs cache content optimization control strategy result information based on content cache resources and communication resources to the control strategy output and distribution submodule.
The result information comprises communication resources which are distributed by the system for all contents and take the contents as granularity and content cache resource information.
S206: the control strategy output and distribution submodule receives the optimization control result of the cached content, generates content network slice information and content network slice generation control information corresponding to each content based on the optimization control result information, sends the content network slice information corresponding to each content to the content network slice searching and recording submodule of the macro base station controller, and simultaneously sends the content network slice generation control information corresponding to the optimization control result to the content network slice generation control strategy receiving submodule of the micro base station controller and/or the wireless access point controller related to the optimization control result and/or the content network slice generation control strategy receiving submodule of the user terminal controller.
S207: the content network slice searching and recording submodule of the macro base station controller updates the content network slice information aiming at all contents; and the content network slice generation control strategy receiving submodule of the micro base station and/or the wireless access point controller and/or the content network slice generation control strategy receiving submodule of the user terminal controller performs resource allocation according to the received content network slice generation control information to generate a content network slice corresponding to each content.
Further, after the generation process of the content network slice is completed, the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the optimization control result sends a content cache optimization resetting success message to the macro base station controller.
S208: and the control strategy output and distribution submodule of the macro base station receives the content cache optimization resetting success message of all the micro base station controllers and/or wireless access point controllers and/or user terminal controllers related to the optimization control result.
And finishing the optimization generation process of the static content network slice.
It should be noted that the above-mentioned flow of the static content network slice optimization generation method performed by the macro base station controller for all contents in the system may also be used for the static content network slice optimization generation of the macro base station for specific contents.
As another example, referring to fig. 21, fig. 21 is a flowchart illustrating a method for optimally generating a static content network slice of a micro base station controller according to an embodiment of the present invention. The method comprises the following steps:
s211: the information collecting and analyzing submodule of the micro base station controller receives the system state information of the user terminal controller to which the micro base station controller belongs and the micro base station controller connected with the micro base station controller.
The method includes, but is not limited to, content-related state information and communication resource state information, where the content-related state information includes, but is not limited to, change information of a specific content copy due to user mobility or autonomous content removal by a user terminal, and the communication resource state information includes, but is not limited to, load/content load state information of a specific link of a controller to which the micro base station belongs, and load/content load state information of the specific link; and the information acquisition and analysis submodule analyzes and provides the specific performance index of the area to which the micro base station belongs after the state change information is given.
S212: and the information acquisition and analysis submodule of the micro base station controller judges whether the specific performance index reaches a preset threshold value, if so, S211 is executed, otherwise, the optimization generation process of the static content network slice is started, and S213 is executed.
S213: the information acquisition and analysis submodule of the micro base station controller acquires the number of user terminals in the area to which the micro base station controller belongs, the networking state between user terminal equipment, the networking state information between the micro base station and other micro base stations/wireless access points, and the use state information of each content cache of the content cache network to which the micro base station controller belongs, and outputs the current network parameters of the area to which the micro base station controller belongs and the content parameters of the content cache network to the control parameter generation submodule.
The network parameters include, but are not limited to, a networking topological graph among nodes such as a macro base station, a micro base station, a wireless access point and a user terminal, degrees of each node and central betweenness; the content parameters include, but are not limited to, Zip parameters, arrival rate of content service requests, number of contents, popularity of contents, capacity of content cache, usage of content cache, etc.
S214: the control parameter generation submodule selects a specific performance index as an optimization target of the optimization generation process of the current static content network slice according to the system state information, the network parameters and the content parameters output by the state information acquisition and analysis module, selects a part of preset threshold values of the system state information and/or the state information as an optimization limiting condition during the optimization generation of the current content network slice, and generates and outputs the control parameters to the static content network slice optimization control strategy unit based on the optimization target and the optimization limiting condition.
Wherein, the optimization target includes but is not limited to a hit rate of each content service request at a user level, a resource usage amount of a communication link/related to the content, and an access delay of the content, and the corresponding preset threshold includes but is not limited to: the method comprises the steps of setting a preset threshold corresponding to the bandwidth of a communication link, setting a preset threshold corresponding to the maximum hop count of content access, and setting a preset threshold corresponding to the cost value of the acquired content. Bandwidth limitations of the communication link include, but are not limited to: link bandwidth threshold/load state threshold information related to content of a forward link between the micro base station and the macro base station, link bandwidth threshold/load state threshold information related to content between the micro base station and other micro base stations, and specific content including but not limited to content with specific content copy change caused by user mobility or user terminal self-removal content, and content with specific popularity, according to the selection result, generating and outputting control parameters to the static content network slice optimization control strategy unit based on optimization objectives and optimization limiting conditions.
S215: the static content network slice optimization control strategy unit converts the content network slice optimization generation problem into a cache content placement optimization problem aiming at the specific content selected in the system and based on a specific optimization target and a specific optimization limiting condition, completes the optimization based on the optimization problem, and outputs content cache optimization control strategy result information which is oriented to the specific content and based on content cache resources and communication resources to the control strategy output and distribution submodule.
The result information comprises communication resources which are distributed for the selected specific content and take the content as granularity and content cache resource information.
S216: the control strategy output and distribution submodule receives the optimization control strategy result, generates content network slice information and content network slice generation control information corresponding to each content based on the optimization control strategy result information, sends the content network slice information corresponding to each content to the content network slice searching and recording submodule of the micro base station controller, and simultaneously sends the content network slice generation control information corresponding to the optimization control result to the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the optimization control result.
S217: the content network slice searching and recording submodule of the micro base station controller updates content network slice information aiming at specific content, and the content network slice generation control strategy receiving submodule of the micro base station controller and/or the wireless access point controller related to the optimization control result and/or the content network slice generation control strategy receiving submodule of the user terminal controller carry out resource distribution according to the received content network slice generation control information to generate content network slices corresponding to each content.
In the specific execution process, after the generation process of the content network slice is completed, the related micro base station controller and/or wireless access point controller and/or user terminal controller sends a content cache optimization resetting success message to the macro base station controller;
s218: and the control strategy output and distribution submodule of the micro base station receives the content cache optimization resetting success information of all the micro base stations and/or wireless access points and/or user terminals related to the optimization control result.
And finishing the optimization generation process of the static content network slice.
It should be noted that the above-mentioned flow of the method for generating static content network slices based on specific content by the micro base station controller may also be used for generating static content network slices based on specific content by the wireless access point controller, and is not described herein again.
In the embodiment of the invention, the optimized generation method of the dynamic content network slice refers to a content network slice optimized generation method based on single content, which is completed by a system aiming at a content service request of a user. The optimized generation method of the dynamic content network slice can be completed by a macro base station controller or a specific micro base station controller, and the optimized generation method of the dynamic content network slice aiming at single content is completed in the macro base station controller and the micro base station controller based on the content service request of a user respectively given below.
Referring to fig. 22, fig. 22 is a schematic flowchart of a method for optimally generating a dynamic content network slice of a macro base station controller according to an embodiment of the present invention, where the method includes the following steps:
s221: the macro bs controller receives the user content service request from the micro bs controller and executes S222.
S222: the content network slice management module in the macro base station controller finds the content network slice information and executes S223.
S223: the information acquisition and analysis submodule in the macro base station controller acquires the number of nodes of the nodes in the system, networking state information between the nodes and state information of content cache of the content cache network, analyzes and outputs network parameters and content parameters of the system to the control parameter generation submodule, and executes S224.
S224: the control parameter generation submodule selects a specific performance index as an optimization target of the dynamic content network slice optimization generation process based on the searched content network slice information according to the network parameter and the content parameter output by the state information acquisition and analysis submodule, selects partial state information and/or a preset threshold value as an optimization limiting condition when the content network slice is generated, and selects the requested content as optimized content.
The optimization target includes but is not limited to a content service request hit rate of the content at a user level, a resource utilization rate of a communication link/related to the content, and a content access delay, and the optimization limiting conditions include but is not limited to a bandwidth limit of the communication link/related to the content, a maximum hop count of content access, and a cost limit of obtaining the content; wherein, the bandwidth limitation conditions include but are not limited to link bandwidth limitation/load bandwidth limitation/content-related load bandwidth limitation between macro base station and micro base station, link bandwidth limitation/load bandwidth limitation/content-related load bandwidth limitation between micro base station and user, link bandwidth limitation/link load bandwidth limitation/content-related load bandwidth limitation between users; and generating and outputting control parameters to the dynamic content network slice optimization control strategy unit based on the optimization target and the optimization limiting condition according to the selection result, and executing S225.
S225: the dynamic content network slice control strategy unit converts the optimization generation problem of the content network slice into a cache content placement optimization problem aiming at the requested content and based on a specific optimization target and a specific optimization limiting condition, and completes the optimization based on the optimization problem.
The dynamic content network slice control strategy unit outputs an optimized control strategy result aiming at the content and based on the content cache resource and the communication resource to the control strategy output and distribution submodule, namely the communication resource and the content cache resource which are distributed by the system for the content are taken as granularity; meanwhile, the macro bsc updates the content network slice information for the content in its content network slice finding and recording submodule, and executes S226.
S226: the control strategy output and distribution submodule receives the result of the content cache optimization control strategy, generates content network slice information and content network slice generation control information, sends the content network slice generation control information to a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the current optimization control result, sends the content network slice information to the user terminal controller requesting the content through the micro base station controller connected with the user terminal, and executes S227.
S227: and the content network slice generation control strategy receiving module of each micro base station controller and/or wireless access point controller and/or user terminal controller related to the optimization control result respectively controls the content cache submodule thereof to carry out content cache reset according to the received content network slice generation control information, and controls the corresponding communication resource module to distribute communication resources for the content network slice.
After the content network slice is generated, each user terminal controller related to the current optimization control result sends a content cache optimization resetting success message to the control strategy output and distribution submodule of the micro base station controller to which the user terminal controller belongs, each micro base station controller receives the content cache optimization resetting success message in the current content network slice optimization generation process, collects the information of the message, sends the content cache optimization resetting success message after information combination to the macro base station controller, and executes S228.
And the control strategy output and distribution submodule of the macro base station controller receives a content cache optimization resetting success message from each micro base station and/or wireless access point controller and/or user terminal controller related to the optimization control result.
S228: and finishing the optimization generation process of the dynamic content network slice of the macro base station controller.
The process of the dynamic content network slice optimization generation process of the micro base station controller in the embodiment of the invention can comprise the following steps:
step 1: the micro base station controller SBS1 receives the content service request from the user, searches the content network slice information in the content network slice management module, if the content network slice information is searched, then executes step 3; if the content network slice information of the content is not found, step 2 is executed.
Step 2: the micro base station controller SBS1 makes its neighboring SBS2 controller search the content network slice information in its content network slice management module, if the SBS2 controller searches the content network slice information, the SBS2 controller feeds back the content network slice information of the content to the SBS1 micro base station controller, executes step 9; if the SBS2 controller does not find the content network slice information, the micro base station SBS1 sends the content service request to the macro base station and performs step 16.
And step 3: the content web slice control policy sub-module in the SBS1 controller initiates a dynamic content web slice optimization generation process based on the content, performing step 4.
And 4, step 4: and the information acquisition and analysis submodule analyzes and generates network parameters and content parameters of the system according to the acquired number of the user terminals to which the micro base station belongs, networking state information among the nodes and content cache state information of the content cache network, inputs the generated network parameters and content parameters into the control parameter generation submodule, and executes the step 5.
And 5: the control parameter generation submodule selects a specific performance index of the dynamic content network slice optimization generation process as an optimization target based on the searched content network slice information according to the network parameters and the content parameters output by the state information acquisition and analysis submodule, and selects partial state information and/or a preset threshold value as an optimization limiting condition when the content network slice is generated, wherein the optimization target comprises but is not limited to the hit rate of the content service request of the content at a user level, the resource utilization rate of a communication link/the resource utilization rate related to the content and the access delay of the content, and the limiting condition when the optimization comprises but is not limited to the bandwidth limitation of the communication link/the bandwidth limitation related to the content, the maximum hop count of content access and the cost of obtaining the content information; wherein, the bandwidth limitation of the communication link includes but is not limited to link bandwidth limitation/link load bandwidth limitation/load bandwidth limitation related to the content between the micro base station and the user, link bandwidth limitation/link load related to the content between the users, and generates and outputs the control parameter to the dynamic content network slice control strategy sub-module based on the optimization objective and the optimization limitation, and executes step 6.
Step 6: the dynamic content network slice control strategy unit converts the optimization generation problem of the content network slice into a cache content placement optimization problem based on a specific optimization target and specific limitation aiming at the requested content, completes the optimization based on the optimization problem, and outputs an optimization control result based on content cache resources and communication resources to a strategy output and distribution submodule, namely, the optimization control result comprises the content as granularity, and the communication resources and the content cache resources distributed by the system for the content; step 7 is performed.
And 7: the control strategy output and distribution submodule receives the result of the optimization control strategy and generates content network slice generation control information and content network slice information; the strategy output and distribution submodule sends the content network slice generation control information to a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the optimization control result, and sends the content network slice information to the user terminal controller of S1 requesting the content; step 8 is performed.
And 8: a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the optimization control result generates control information according to the received content network slice, controls a content cache submodule to carry out cache content optimization resetting, and controls a communication resource module to distribute communication resources for the content network slice; after the resource allocation is completed, the content network slice generation control strategy receiving submodule of the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the optimization control result sends a content cache optimization reset success message to the micro base station controller triggering the optimization process, and step 15 is executed.
And step 9: the content network slice control policy sub-module of the SBS1 controller starts a dynamic content network slice optimization generation process based on the content network slice information fed back by its neighboring SBS2 controller, and performs step 10.
Step 10: the information acquisition and analysis submodule in the SBS1 controller acquires the number of user terminals controlled by the micro base station SBS1, networking state information of each node related to the SBS1, and content cache use state information of each content cache network, analyzes and outputs network parameters and content parameters to the control parameter generation submodule, and executes step 11.
Step 11: the control parameter generation submodule of the SBS1 controller selects a specific performance index as an optimization target of the current dynamic content network slice optimization generation process based on content network slice information searched by its neighbor micro base station controller according to the network parameters and content parameters output by the state information acquisition and analysis submodule, selects a part of state information and/or a preset threshold as an optimization limiting condition when generating the content network slice, wherein the optimization target includes but is not limited to a content service request hit rate based on the content at a user level, a resource usage rate of a communication link/a resource usage rate related to the content, and an access delay of the content, the optimization limiting condition includes but is not limited to a bandwidth limit of the communication link/a bandwidth limit related to the content, a maximum hop count of the content access, and a cost for acquiring the content information, wherein, the bandwidth limitation of the communication link includes but is not limited to link bandwidth limitation/link load bandwidth limitation/content related link load bandwidth limitation between the micro base station and the user, link bandwidth limitation/link load bandwidth limitation/content related link load bandwidth limitation between the user terminals; generating and outputting control parameters to a dynamic content network slice control strategy unit based on the optimization target and the optimization limit; step 12 is performed.
Step 12: the dynamic content network slice control strategy unit converts the optimization generation problem of the content network slice based on the requested content into a cache content placement optimization problem based on a specific optimization target and specific limitation aiming at the requested content, and completes the optimization based on the optimization problem; outputting an optimization control result based on the content cache resources and the communication resources to a strategy output and distribution submodule, wherein the optimization control result comprises the communication resources and the content cache resources which are distributed for the content by the system and the content is granularity; and step 13 is performed.
Step 13: the control strategy output and distribution submodule receives the optimization control strategy result, generates content network slice generation control information and content network slice information based on the optimization control result, sends the corresponding content network slice generation control information to a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the current optimization control result, sends the content network slice information to a user terminal controller S1, and executes step 14.
Step 14: a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the optimization control result generates control information according to the received content network slice, controls a content cache submodule to carry out content cache resetting, and controls a communication resource module to distribute communication resources for the content network slice; after the resource allocation is completed, the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the optimization control result sends a content cache optimization resetting success message to the micro base station controller SBS1 triggering the optimization process; and step 15 is performed.
Step 15: and the control strategy output and distribution submodule of the micro base station controller receives a content cache optimization resetting success message fed back by each micro base station controller and/or wireless access point controller and/or user terminal controller related to the optimization control result.
Step 16: and finishing the optimization generation process of the dynamic content network slice.
It should be noted that the above-mentioned flow of the dynamic content network slice optimization generation process performed by the micro base station controller may also be used for the optimization generation of the dynamic content network slice by the wireless access point controller.
In other embodiments, in the network scenario shown in fig. 2, when the user equipment S1 issues a content service request, the system will trigger the optimized generation process of the dynamic content network slice for the content service request. After the search process of the content information is finished, the resource allocation process in the mobile wireless access network based on the search result of the current time, including the allocation of content cache resources and communication resources, is finished, and finally, a content network slice aiming at the content is generated in the current mobile wireless access network.
The following system searches for content based on a content service request sent by a user, generates a content network slice based on the content by triggering a dynamic content network slice optimization generation process, and completes a response service process for the content service request of the user.
Step 1: the user terminal controller of S1 generates a content service request message in the message generating and receiving module according to the operation of the user requesting the content service; the message generating and receiving module extracts the content information identifier and sends the content information identifier to a content network slice management module of the user terminal controller of S1; the content network slice management module in the user terminal controller in S1 searches for the content network slice information, and if the content network slice information is found, then step 7-1 is executed; if the content network slice information is not found, the content service request is transmitted to the neighbor user terminal controller of S1, and step 2 is performed.
Step 2: the content network slice management module in the neighbor user terminal controller of the user terminal S1 searches for content network slice information, and if the content network slice information is found, the step 7-2 is executed; if none of the neighboring user terminals finds the content network slice information, a content finding failure message based on the content is returned to the user terminal controller S1, and step 3 is executed.
And step 3: the user terminal S1 selects the user terminal device S2 with the highest medium value of its neighboring user terminals, and sends the content service request to the user terminal controller of S2 to request it to search the content information; s2, the user terminal controller makes the neighbor user terminal controller search the content network slice information corresponding to the content in the content network slice management module, if the neighbor user terminal controller searches the content network slice information, then step 7-3 is executed; if the content network slice information is not found, a content search failure message is returned to the user terminal controller of S1, and the user terminal controller of S1 sends a content service request to the SBS1 connected thereto, and performs step 4.
And 4, step 4: the micro base station controller of the micro base station SBS1 connected to S1 performs a Dynamic content network slice optimization generation process (referred to as a Dynamic-SBS1 process for short) of the micro base station controller.
Step 4-1: judging whether the content network slice information corresponding to the requested content is found or not when the Dynamic-SBS1 process is finished, if not, the micro base station controller SBS1 sends the content service request to the macro base station controller MBS1 to which the micro base station controller belongs, the MBS1 executes the Dynamic content network slice optimization generation process (the Dynamic MBS1 process for short) of the macro base station controller, and S1 the user terminal controller obtains the content according to the received updated content network slice information; executing the step 8; if yes, S1 the user terminal controller obtains the content according to the received updated content network slice information; step 8 is performed.
Step 7-1: s1 the management module of the content network slice in the user terminal controller updates the content network slice information for the content, S1 obtains the content according to the updated content network slice information; step 8 is performed.
Step 7-2: s1 the content network slice management module in the user terminal controller selects the content network slice information searched by one of the neighboring user terminal controllers, and based on the content network slice information, updates the content network slice information aiming at the content in the content network slice searching and recording submodule S1, and S1 obtains the content according to the updated content network slice information; step 8 is performed.
And 7-3: s2, the content network slice management module in the user terminal controller selects the content network slice information searched by one neighbor user terminal controller; the content network slice management module in the S2 controller updates the information of the content network slice and sends the content network slice information to S1; s1 the content network slice management module in the user terminal controller updates the information of the content network slice; s1, the user terminal controller obtains the content according to the updated content network slice information; step 8 is performed.
And 8: this time, the user terminal S1 requests the content service, and the system completes the content service request process.
In the embodiment of the invention, the synchronous updating and maintaining process of the content network slice is mainly used for completing the updating and synchronous maintaining of the content network slice and the content network slice information. The following provides a content network slice synchronization update maintenance process completed in the system, starting from different controller angles and different situations where content network slice synchronization may occur, respectively.
The synchronous updating maintenance of the content network slice in the system is different along with the difference of controllers triggering the process, and the specific process of the synchronous updating maintenance is different. According to the controller classification in the system, the synchronous updating maintenance process is divided into a content network slice synchronous updating maintenance process triggered by a macro base station controller, a content network slice synchronous updating maintenance process triggered by a micro base station controller/wireless access point controller and a content network slice synchronous updating maintenance process triggered by a user terminal controller.
The synchronous updating and maintaining process of the content network slices triggered by the macro base station controller mainly refers to the synchronous updating and maintaining process of the content network slices caused by the optimization and generation process of static content network slices and the optimization and generation process of dynamic content network slices initiated by the macro base station.
The optimization generation process of the static content network slices can be based on specific performance indexes in the system, the optimization generation of the content network slices is completed aiming at all contents or part of specified contents, and after the optimization generation process of the static content network slices is completed, a synchronous updating maintenance process (referred to as MBS-initiated-CSYN-S process for short) of the static content network slices triggered by a macro base station is started; when a user sends a content service request, if the requested content information cannot be obtained at the micro base station level based on the search process of the content network slice, the content service request is forwarded to a macro base station controller, the macro base station controller starts the optimization generation process of the dynamic content network slice, and after the process is finished, the macro base station controller starts a dynamic content network slice synchronous updating maintenance process (referred to as MBS-initiated-CSYN-D process for short) triggered by a macro base station.
The MBS-initiated-CSYN-S process is as follows:
a macro base station controller monitors specific performance indexes of a system, wherein the specific performance indexes include but are not limited to the change information of the number of copies of specific content in an area controlled by the macro base station controller, the content hit rate of the specific micro base station controller, the link state connected with the macro base station controller/the link state information related to the content, and the load of a specific link/the load state information related to the content; when the specific performance index of the system does not meet the preset threshold value, starting a Static content network slice optimization generation process of the macro base station, wherein the optimization generation process can be a content network slice optimization generation process (namely, a Static-MBS-All Contents process) aiming at All Contents or a content network slice optimization generation process (namely, a Static-MBS-specific Contents process) aiming at partial Contents; if not, the specific performance index of the system is continuously monitored.
When the Static-MBS-All Contents process or the Static-MBS-specific Contents process is finished, the macro base station controller of the system generates content network slices based on All Contents or part of Contents, and generates control information and content network slice information of the corresponding content network slices. The control strategy output and distribution submodule of the macro base station controller sends content network slice information to a content network slice searching and recording submodule of the macro base station controller, the content network slice searching and recording submodule updates corresponding content network slice information, after the updating is finished, the content network slice searching and recording submodule sends content network slice synchronous updating maintenance request information to a content network slice synchronous submodule, the information comprises but is not limited to the ID numbers of the contents corresponding to all the content network slices generated in the optimization generation process, the corresponding content network slice information, the ID numbers of the optimization generation process and the like, the content network slice synchronous submodule sends content network slice synchronous updating maintenance request information to a content network slice generation system manager, and the information comprises but is not limited to the ID number of the macro base station controller, the ID number of the optimization generation process, the ID number of the, And the ID numbers of the contents corresponding to all the content network slices generated in the optimization generation process and the content network slice information corresponding to the ID numbers. The content network slice generation system manager receives the content network slice synchronous updating maintenance request message, sends the content network slice synchronous updating maintenance request message based on the optimization generation process to the micro base station controller and/or the wireless access point controller in the system, the micro base station controller and/or the wireless access point controller in the system receives the content network slice synchronous updating maintenance request message, updates the corresponding content network slice information in the content network slice searching and recording sub-module to which the micro base station controller and/or the wireless access point controller belong, simultaneously sends the content network slice synchronous updating maintenance request message to each user terminal controller to which the micro base station controller belongs, each user terminal controller updates the corresponding content network slice information in the content network slice searching and recording sub-module to which the micro base station controller belongs based on the message, and after the content network slices of all the controllers are updated synchronously, the MBS-initiated-CSYN-S process ends.
The MBS-initiated-CSYN-D procedure is described as follows:
when the macro base station controller receives a content service request from a micro base station controller, the macro base station controller starts a Dynamic content network slice optimization generation process of the macro base station, namely a Dynamic-MBS process. After the Dynamic-MBS process is finished, the system macro base station controller generates a content network slice based on the requested content, and generates control information and content network slice information of the corresponding content network slice. The control strategy output and distribution submodule of the macro base station controller sends the content network slice information to the content network slice searching and recording submodule, the content network slice searching and recording submodule updates the corresponding content network slice information, after the updating is finished, the content network slice searching and recording submodule sends the content network slice synchronous updating maintenance request information based on the content to the content network slice synchronous submodule, the information includes but is not limited to the ID number of the optimized content in the dynamic optimization generation process, the corresponding content network slice information, the ID number of the optimization generation process, and the like, the content network slice synchronous submodule sends the content network slice synchronous updating maintenance request information to the content network slice generation system manager, the information includes but is not limited to the ID number of the macro base station controller, the ID number of the optimization generation process, the, And the ID number of the content related to the optimization generation process and the corresponding content network slice information. The content network slice generation system manager receives the content network slice synchronous updating maintenance request message, sends the content network slice synchronous updating maintenance request message based on the dynamic optimization process to the micro base station controller and/or the wireless access point controller in the system, all the micro base station controllers and/or the wireless access point controllers in the system receive the content network slice synchronous updating maintenance request message, updates the corresponding content network slice information in the content network slice searching and recording submodule to which the micro base station controllers and/or the wireless access point controllers belong, simultaneously sends the content network slice synchronous updating maintenance request message to each user terminal controller to which the micro base station controllers belong, and each user terminal controller updates the corresponding content network slice information in the content network slice searching and recording submodule to which the micro base station controller belongs based on the message, and after the synchronous updating of the content network slices of all the controllers is finished, finishing the MBS-initiated-CSYN-D process.
The synchronous updating and maintaining process of the content network slice triggered by the micro base station controller in the embodiment of the invention mainly refers to the synchronous updating and maintaining process of the content network slice caused by the optimization and generation process of the static content network slice and the optimization and generation process of the dynamic content network slice initiated by the micro base station. The method comprises the steps that a static content network slice optimization generation process can be based on specific performance indexes of a control area where a micro base station belongs, content network slice optimization generation is completed aiming at part of specified content, and after the static content network slice optimization generation process is completed, a synchronous updating maintenance process (SBS-initiated-CSYN-S process for short) of the static content network slice triggered by the micro base station is started; the dynamic content network slice is a content network slice optimization generation process based on the content of the request initiated by the content service request of the user, when the user sends the content service request to the micro base station controller, the micro base station controller starts the dynamic content network slice optimization generation process based on the content, and after the optimization generation process is finished, the micro base station controller starts the dynamic content network slice synchronous update maintenance process triggered by the micro base station (SBS-initiated-CSYN-D process for short).
The SBS-initiated-CSYN-S procedure is described as follows:
the micro base station controller monitors specific performance indexes of a control area to which the micro base station controller belongs, wherein the specific performance indexes include but are not limited to content copy quantity change information of the control area to which the micro base station controller belongs, content hit rate of the micro base station controller, link state connected with the micro base station controller/link state information related to content, load state information of a specific link/load state information related to content; when the Specific performance index of the control area does not meet a preset threshold value, starting a Static content network slice optimization generation process (namely, a Static-SBS-Specific Contents process) aiming at partial content by the micro base station; if not, the micro base station controller continues to monitor the specific performance index of the control area to which the micro base station controller belongs.
When the Static-SBS-Specific Contents procedure is finished, the micro base station controller generates content network slices based on partial Contents, and content network slice generation control information and content network slice information corresponding to the Contents. The control strategy output and distribution submodule of the micro base station controller sends the content network slice information to the content network slice searching and recording submodule, the content network slice searching and recording submodule updates the corresponding content network slice information, after the updating is completed, the content network slice searching and recording submodule sends content network slice synchronous updating maintenance request information to the content network slice synchronous submodule, the information includes but is not limited to the ID number of the specified content generated in the optimization generation process this time, the corresponding content network slice information, the ID number of the optimization generation process this time, etc., the content network slice synchronization sub-module sends a content network slice synchronization update maintenance request message to the content network slice generation system manager, the message includes, but is not limited to, the ID number of the micro base station controller, the ID number of the current optimized generation process, the ID number of the specified content generated in the current optimized generation process, and the content network slice information corresponding thereto. The content network slice generation system manager receives the content network slice synchronous updating maintenance request message, sends the content network slice synchronous updating maintenance request message based on the optimization process to the macro base station controller, the micro base station controller and/or the wireless access point controller in the system, the macro base station controller, the micro base station controller and/or the wireless access point controller in the system receives the content network slice synchronous updating maintenance request message, updates the corresponding content network slice information in the content network slice searching and recording sub-module to which the macro base station controller, the micro base station controller and/or the wireless access point controller belong, simultaneously sends the content network slice synchronous updating maintenance request message to each user terminal controller in the control area to which the macro base station controller belongs, and each user terminal controller updates the content network slice information of the content network slice searching and recording sub-module to which the micro base station controller belongs based on the message, and when all the micro base station controllers and/or the wireless access point controllers and the user terminal controller finish the synchronous updating of the content network slices in the optimization generation process, finishing the SBS-initiated-CSYN-S process.
The SBS-initiated-CSYN-D procedure is described as follows:
when the micro base station controller receives a content service request from a certain user terminal controller, a Dynamic content network slice optimization generation process (namely a Dynamic-SBS process) of the micro base station is started. After the Dynamic-SBS process is finished, the micro base station controller generates a content network slice based on the requested content, and generates control information and content network slice information of the corresponding content network slice. The control strategy output and distribution submodule of the micro base station controller sends the content network slice information to the content network slice searching and recording submodule, the content network slice searching and recording submodule updates the corresponding content network slice information, after the updating is finished, the content network slice searching and recording submodule sends the content network slice synchronous updating maintenance request information based on the content to the content network slice synchronous submodule, the information includes but is not limited to the ID number of the optimized content in the dynamic optimization generation process, the corresponding content network slice information, the ID number of the optimization generation process and the like, the content network slice synchronous submodule sends the content network slice synchronous updating maintenance request information to the content network slice generation system manager, and the information includes but is not limited to the ID number of the micro base station controller, the ID number of the optimization generation process, the, And the ID number of the content related to the optimization generation process and the corresponding content network slice information.
The content network slice generation system manager receives the content network slice synchronous updating maintenance request message, sends the content network slice synchronous updating maintenance request message based on the dynamic optimization process to the macro base station controller, the micro base station controller and/or the wireless access point controller in the system, the macro base station controller, the micro base station controller and/or the wireless access point controller in the system receives the content network slice synchronous updating maintenance request message, updates the corresponding content network slice information in the content network slice searching and recording submodule to which the macro base station controller, the micro base station controller and/or the wireless access point controller belong, simultaneously sends the content network slice synchronous updating maintenance request message to each user terminal controller to which the macro base station controller belongs, and each user terminal controller updates the corresponding content network slice information in the content network slice searching and recording submodule to which the user terminal controller belongs based on the message, when the synchronous update of all the controllers is finished, the SBS-initiated-CSYN-D process is finished.
It should be noted that the above-mentioned flow of the content network slice synchronization update maintenance process of the micro base station controller may also be used for content network slice synchronization update maintenance of the wireless access point controller, and is not described herein again.
The content network slice synchronous updating maintenance process triggered by the user terminal controller in the embodiment of the invention refers to a content network slice synchronous updating maintenance process of a system caused when the content copies of specific content stored in the user terminal are reduced. The process includes a content network slice synchronous update maintenance process initiated by an active user terminal (referred to as an active UE-initiated-CSYN process for short) and a content network slice synchronous update maintenance process initiated by a passive user terminal (referred to as a passive UE-initiated-CSYN process for short).
Wherein, the active UE-initiated-CSYN process refers to a content network slice synchronous updating maintenance process caused by a user actively erasing a specific content copy; the passive UE-initiated-CSYN procedure refers to a content network slice synchronization update maintenance procedure caused by a change in the number of content copies belonging to an original region due to the user terminal moving out of the region.
1. Active UE-initiated-CSYN procedure
And after the content updating is finished, the content cache updating submodule sends content copy erasing information to the content network slice synchronization submodule, wherein the content copy erasing information comprises but is not limited to the ID number of the erased content, the ID of the user controller where the erased content is located and the ID number of the original content cache.
The content network slice synchronization submodule sends a content network slice synchronization erasing message to the micro base station controller to which the user terminal belongs at present, wherein the message comprises but is not limited to the ID number of the user terminal controller, the ID number of the erased content and the ID number of the original content cache.
The micro base station controller of the user terminal controller receives the content network slice synchronous erasing message from the user, and gathers the information to generate the content network slice synchronous erasing message after the information is merged; the micro base station controller sends the synchronous erasing message of the content network slice to a content network slice generation system manager; the content network slice generation system manager sends a content network slice synchronous updating maintenance request message based on the optimization process to a macro base station controller, all micro base station controllers and/or a wireless access point controller in the system; all micro base station controllers and/or wireless access point controllers in the system receive the synchronous updating and maintaining request message of the content network slice, and update the corresponding content network slice information in the content network slice searching and recording sub-module to which the micro base station controllers and/or the wireless access point controllers belong; meanwhile, the synchronous updating and maintaining request message of the content network slice is also sent to each user terminal controller to which the synchronous updating and maintaining request message belongs; each user terminal controller updates the corresponding content network slice information in the content network slice searching and recording submodule to which the user terminal controller belongs based on the message; when the synchronous updating of all controllers is finished, the active UE-initiated-CSYN process is finished.
2. Passive UE-initiated-CSYN procedure
The information acquisition and analysis submodule of the micro base station controller monitors the mobility state information of the user terminal, judges whether the user moves out of the area to which the micro base station controller belongs, and if so, the micro base station controller collects content network slice information related to the system and stored on the user terminal, and generates content copy erasing information corresponding to the content network slice information; if not, continuing to monitor the mobility state information of the user terminal.
When the user terminal moves out of the region where the micro base station controller belongs, the user terminal controller controls the content cache submodule through the content updating submodule to actively remove the content network slice, namely the content copy, which is stored on the user terminal and relates to the system. Meanwhile, the micro base station controller starts the SBS-initiated-CSYN-S process aiming at the content network slice synchronous erasing message of the user terminal.
In this embodiment of the present invention, as an example, a content network slice synchronous update maintenance flow (NSSM-initiated-CSYN process) triggered by a content network slice generation system manager may refer to fig. 23, and fig. 23 is a schematic diagram of a content network slice information synchronous update maintenance flow triggered by a content network slice generation system manager in this embodiment of the present invention.
When the content network slice generation system manager performs synchronous update for a specific content network slice in the system, a content network slice synchronous update maintenance process triggered by the content network slice generation system manager can be started, and the steps of the process are as follows:
s231: the content network slice generation system manager starts a synchronous updating maintenance process for a specific content network slice in the system and generates a content network slice synchronous updating maintenance request message corresponding to the content.
S232: the content network slice generation system manager sends a content network slice synchronous updating maintenance request message to a specific macro base station controller, a specific micro base station controller and a specific wireless access point controller, and the macro base station controller, the specific micro base station controller and the specific wireless access point controller receive the content network slice synchronous updating maintenance request message.
S233: and the micro base station controller and the wireless access point controller send a content network slice synchronous updating maintenance request message to the user terminal controller.
S234: each controller receives the request message for synchronous updating and maintaining of the content network slice, synchronous updating of the content network slice is carried out aiming at the specific content, and each macro base station controller, micro base station controller, wireless access point controller and user terminal controller finish synchronous updating of the content network slice aiming at the content.
S235: the content network slice synchronization update maintenance process for the specific content triggered by the content network slice generation system manager ends.
In the process of the embodiment of the present invention, in addition to the change of the content network slice information caused by the static content network slice optimization generation process and the dynamic content network slice optimization generation process, because the user supports mobility, the connection between users may change due to the mobility of the user, when a certain user moves out of an area controlled by a certain micro base station controller, a situation may occur that some content copies stored in a content cache in the user terminal are invalid, thereby causing the change of the content network slice information corresponding to the content, and thereby also causing the change of the corresponding content network slice information in a content network slice recording module in a macro base station controller, a micro base station controller, a wireless access point controller and a user terminal controller; when the same part of content cache supports both controlled content update and autonomous content update, the content cache update based on autonomous control in the content cache may cause some content copies in the system to be removed, and also may cause a situation that some content network slice information in the content network slice searching and recording sub-module is changed, so the system needs to complete a synchronous update maintenance process of the content network slice.
The embodiment of the invention provides a content network slice synchronous updating and maintaining process which is finished by the system under different conditions.
As an example, the content network slice synchronization update maintenance process caused by the movement of the user terminal may be referred to as a UM-CSYN process, referring to fig. 24, where fig. 24 is a schematic diagram of a content network slice synchronization update maintenance flow caused by the movement of the user terminal in the embodiment of the present invention, and includes the following steps:
s241: and the state information acquisition and analysis submodule of the user terminal controller detects and analyzes the physical layer link state information of the user terminal.
S242: and judging whether the physical layer link state information changes, if not, executing S241, and if so, executing S243.
S243: judging whether the link state change information can cause the user terminal to leave the current micro base station controller of the user terminal, if so, executing S244, otherwise, reporting the physical link state change information to the current micro base station controller, and executing S241.
S244: and the state information acquisition and analysis submodule of the user terminal controller sends the information of the change of the physical link to the content information searching and recording submodule of the user terminal controller.
The content information searching and recording submodule counts content network slices stored by the user terminal and sends the information to the content updating submodule, and when the content updating submodule receives the information that the user terminal sent by the state information collecting and analyzing submodule leaves the micro base station controller, the content updating submodule controls a content cache submodule of the user terminal to remove corresponding content copy information; and after the content copy is removed, the content copy removal success information is sent to a content service request generating and receiving module of the user terminal controller, and the content service request generating and receiving module sends a content network slice synchronous erasing message aiming at the removed content copy to the current micro base station controller to which the user terminal belongs.
S245: the micro base station to which the user terminal belongs currently judges whether the content network slice synchronous erasing message belongs to the content network slice information which needs to be maintained and updated in the area to which the micro base station belongs, if so, S247 is executed, otherwise, S246 is executed.
S246: the micro base station controller sends the content network slice synchronous erasing message to the macro base station controller to which the micro base station controller belongs, and S248 is executed;
s247: a static content network slice synchronization update maintenance procedure (SBS-initiated-CSYN-S procedure) triggered in the micro base station controller based on the micro base station controller caused by the user terminal autonomous erasure is performed and triggered to be performed S248.
S248: the network slice synchronous update maintenance process based on the content caused by the movement of the user terminal is finished.
In the embodiment of the invention, the synchronous updating and maintaining process of the content network slice caused by the self-contained content caching updating of the user terminal comprises the following steps:
step 1: an information acquisition and analysis module of the user terminal controller monitors content cache state information of the user terminal equipment.
Step 2: judging whether the content cache is subjected to autonomous erasure of the specific content copy according to the state information, and if so, entering the step 3; if not, step 1 is entered.
And step 3: the user terminal controller updates the content network slice information of the user terminal controller based on the self-erasing information of the specific content copy, and sends a content network slice synchronous erasing message to the micro base station controller to which the user terminal controller belongs, wherein the message comprises but is not limited to the ID of the erased content, the content cache ID where the erased content copy is located and the ID of the user terminal controller to which the erased content copy belongs.
And 4, step 4: the micro base station controller receives the synchronous erasing information of the content network slice from the user terminal controller, and executes the synchronous updating maintenance process (SBS-initiated-CSYN-S process) of the static content network slice triggered by the micro base station controller based on the synchronous erasing information of the content network slice.
And 5: the synchronous updating maintenance process of the content network slice caused by the autonomous content caching updating mechanism of the user terminal is finished.
In the embodiment of the invention, because the optimization generation process based on the static content network slice can be initiated by a macro base station controller or a micro base station controller, the synchronous updating maintenance process of the content network slice caused by the optimization generation process can be initiated by the macro base station controller or the micro base station controller which triggers the optimization generation process, namely, the MBS-initiated-CSYN-S process or the SBS-initiated-CSYN-S process is executed.
In the embodiment of the invention, the dynamic content network slice optimization generation process can be initiated by a micro base station controller or a macro base station controller, so that the content network slice synchronization update maintenance process caused by the dynamic content network slice optimization generation process can be initiated by the macro base station controller or the micro base station controller which triggers the optimization generation process, namely, the MBS-initiated-CSYN-D process or the SBS-initiated-CSYN-D process is executed.
In the embodiment of the invention, when the content network slice generation system manager changes the content network slice due to the maintenance management reasons such as content updating, the NSSM-initiated-CSYN process is executed.
In the embodiment of the invention, the initialization and configuration process of the system comprises an initialization process of the system, a configuration process of a content cache control mode and a configuration process of a content network slice optimization generation control mode.
And the wireless access network content network slice generation system manager facing the content service completes the initialization process of the system. The initialization process of the system mainly comprises initial parameter setting of the system, performance index threshold setting, node topology configuration of the system, content cache control mode configuration of the system and content network slice generation control mode configuration of the system.
The initialization parameters include, but are not limited to, the maximum number of contents supported by the system/the current number of contents, the maximum number of user terminals supported by the system, the maximum number of macro base stations/the current number of macro base stations, the maximum number of micro base stations/the current number of micro base stations, the maximum number of wireless access points/the current number of wireless access points, and the like, and for each content, the maximum number of copies of contents stored in the user level/the minimum number of copies of contents, the maximum number of copies of contents stored in the micro base station level/the minimum number of copies of contents, the maximum number of copies of contents stored in the macro base station level/the minimum number of copies of contents, and the like; the performance index threshold setting is that the content network slice generation system manager completes the setting of a network-based performance index and a user-based performance index threshold in the system, the network-based performance index comprises but is not limited to a bandwidth maximum usage value of a specific link/a bandwidth maximum usage value related to content, a load bandwidth threshold/a load bandwidth threshold related to content, a load balancing parameter threshold/a load balancing parameter threshold related to content and the like, and the user-based performance index comprises but is not limited to a user-level average content hit rate, a micro base station-level average content hit rate and the like; the node topology configuration of the system is mainly generated by a content network slice generation system manager according to the networking state initialization process of each node in the system, and the generation of a networking topology graph among macro base stations, a networking topology graph among the macro base stations, a micro base station/wireless access point, a networking topology graph among the micro base stations/wireless access points and the micro base stations/wireless access points, a networking topology graph among the micro base stations/wireless access points and a user terminal and a networking topology graph among the user terminal and the user terminal is completed; the content cache control mode configuration of the system completes the content cache control configuration in the system, and mainly comprises the configuration of controlled content cache capacity, autonomous control content cache capacity and a content cache updating mechanism; the configuration of the content network slice optimization generation control mode of the system is completed by a content network slice generation system manager, and the control mode comprises a static content network slice optimization generation mode, a dynamic content network slice optimization generation mode and a control mode supported by both the static content network slice optimization generation mode and the dynamic content network slice optimization generation mode.
In the embodiment of the invention, the content cache in the whole system is configured in a control mode by a content network slice generation system manager of a wireless access network facing to content services.
The configuration of the control mode of the content cache mainly comprises the control mode selection of a controlled content cache management mechanism and the control mode selection of an autonomously controlled content cache management mechanism.
When the control mode is configured, the control configuration may be performed in a centralized control manner, a distributed control manner, and a hybrid control manner.
The following respectively provides a centralized content cache control mode configuration process, a distributed content cache control mode configuration process, and a mixed content cache control mode configuration process. Referring to fig. 25, fig. 25 is a flowchart illustrating a configuration process of a centralized content caching control mode according to an embodiment of the present invention.
The centralized content cache control mode configuration process in fig. 25 completes the unified control mode configuration of the content network slice generation system manager for the content caches to which the micro base station controllers and the user terminal controllers of the system belong, including the controlled content cache capacity of the content cache unit to which the micro base station belongs, the content cache capacity under autonomous control, and the number of contents that can be stored by the controlled content cache. The content cache update mechanism supported by the autonomously controlled content cache includes a content insertion mechanism and a content removal mechanism.
Referring to fig. 26, fig. 26 is a flowchart illustrating a configuration process of a hybrid content caching control mode according to an embodiment of the present invention. In the configuration process of the hybrid content cache control mode shown in fig. 26, the content network slice generation system manager sets the controlled content cache capacity of the content cache to which the micro base station controller and the ue controller belong according to the initialization parameter of the system, and the micro base station controller and the ue controller set the autonomous control content cache capacity to which the micro base station controller and the ue controller belong and the content cache update mechanism thereof.
Referring to fig. 27, fig. 27 is a flowchart illustrating a configuration process of a distributed content caching control mode according to an embodiment of the present invention. Fig. 27 shows a distributed content caching control mode configuration process. The micro base station controller and the user terminal controller respectively configure the controlled content cache capacity, the autonomous control content cache capacity and the content cache updating mechanism of the content cache unit to which the micro base station controller and the user terminal controller belong, the configuration process is completed, the configuration result is sent to a content network slice generation system manager of the system, the content network slice generation system manager records the configuration result, and the content network slice generation control of the system allocates content cache resources for the system to generate the content network slices according to the configuration capacity of the controlled content cache.
The process is that the whole system is configured by the content network slice generation system manager of the mobile wireless access network facing the content service. The configuration of the control mode of the system mainly comprises the configuration of the control relationship of a controller in a mobile wireless access network, a static slice mode and a dynamic slice mode of a content network slice facing to a content service, and the like.
Referring to fig. 28, fig. 28 is a schematic diagram of a configuration process of a content network slice optimization generation control mode of the system in the embodiment of the present invention. Fig. 28 shows a flow of a content network slice optimization generation control pattern configuration process of a system. In the process, because the system can support the static content network slice optimization generation control mode and the dynamic content network slice optimization generation control mode, the content network slice optimization generation control mode identifier of the system can be set, a simple setting mode is that 01 is set to support only the static content network slice optimization generation control mode, 10 is set to support only the dynamic content network slice optimization generation control mode, and 11 is set to support both the static content network slice optimization generation control mode and the dynamic content network slice optimization generation control mode. In the process of the system, a specific content network slice optimization generation control mode identifier is selected, and a content network slice generation system manager generates a control mode identifier based on the selected content network slice optimization, so that the initialization process related to content network slice control of the system based on the control mode is completed.
As an example, a specific embodiment of the Content-oriented Caching Optimization generation method is given below, that is, a Content-oriented Caching Optimization Algorithm (CCSOA) and a Content-oriented network slice Optimization generation method based on the CCSOA Algorithm are provided, in which weighted hop counts of acquired Content are used as costs, the cost is minimized as an Optimization target of a system, and a threshold value required by a user for an average hit rate of a Content service request and a number of copies of Content required at a user level to reach a system requirement is used as an Optimization limiting condition.
The following respectively describes a flow of an optimization generation process of a content network slice based on the CCSOA, an optimization generation method of a static content network slice based on the CCSOA and an optimization generation method of a dynamic content network slice.
In the network scenario shown in fig. 2, when the user equipment S1 sends a content service request, the system will trigger the search and content network slice optimization generation process for the content network slice information based on the CCSOA, and after the search and content network slice generation process is finished, the user terminal obtains the requested content information, and at the same time, the system will complete the synchronous update process for the content network slice information in the mobile radio access network based on the result of the content network slice optimization generation process.
Specifically, the above process includes the steps of:
step 1: a message generating and receiving module in a user terminal controller in the user equipment S1 generates a content service request message according to the operation of the user request content, and sends the content service request message to a content network slice management module of the user equipment; s1, the content network slice management module searches the content network slice information in the content network slice searching and recording sub-module of the user equipment, if the content network slice information is found, the content network slice searching and recording sub-module sends content searching success information to the message generating and receiving module, and ends the content searching, and the step 7-1-1 is entered; if the content network slice information is not found, step 2 is performed.
Step 2: s1 sends the content service request message to its neighbor user terminal through the communication module, the content network slice management module of the neighbor user terminal receives the content service request message through its communication module, searches the content network slice information in its content network slice searching and recording sub-module, and sends the content search response message to S1, if a plurality of neighbor user terminals all search the content network slice information, S1 selects one of the user terminal devices, lets the device send the content network slice information to S1 through its own communication module according to the original path, the content information search is finished, and step 7-1-2 is entered; if none of the neighboring user terminals of the S1 device finds the content network slice information, all send a content finding failure message to S1, and at the same time, S1 proceeds to step 3.
And step 3: s1 selecting the device S2 with the highest degree value in the neighbor user terminal devices based on the networking state between the neighbor user devices which are currently in communication association with the user, S1 sending the content service request message to S2, the content network slice management module of S2 sending the content service request message to the neighbor user terminals which are in communication association with the content service request message through the communication module; the neighbor user terminals of S2 search the corresponding content network slice information in the content network slice searching and recording sub-module of their respective content network slice management module according to the received content service request message, and send the content search response message to S2, if the neighbor user terminals of S2 search the content network slice information, S2 selects one of the user terminals, let the user terminal send the content network slice information to S2 through its communication module according to the original path, then S2 sends the content network slice information to S1, this content search is finished, and go to step 7-1-2; if the neighbor user terminal of S2 does not find the content network slice information, the neighbor user terminal of S2 feeds back a content search failure message to S2, and when all the neighbor user terminals of S2 do not find the content network slice information, S2 feeds back a content search failure message containing an identifier that S2 cannot find the content at the user level to S1, and S1 proceeds to step 4.
And 4, step 4: the user terminal S1 receives the content search failure message sent in S2 and containing the identifier that S2 cannot search the content at the user level, which indicates that the content service request cannot be satisfied at the current user level of the system, and then the user terminal S1 sends the content service request message to the SBS1 connected to it through the communication module. The content service request receiving module of the SBS1 receives the content service request message through the communication module thereof, searches the corresponding content network slice information in the content network slice searching and recording sub-module of the content network slice management module thereof, if the content network slice information is found, the content search is finished this time, and the step 7-2 is entered; if the SBS1 does not find the content network slice information, then step 5 is performed.
And 5: the micro base station controller of the SBS1 sends the content service request message to the neighboring SBS of the SBS1, the SBS searches the corresponding content network slice information in the content network slice searching and recording submodule of the content network slice management module, meanwhile, sends a search response message to the SBS1 controller, if the plurality of SBS search the content network slice information, the SBS1 selects one SBS, and the SBS sends the content network slice information to the SBS1 through the communication module, the content search is finished, and the step 7-2 is entered; if none of the neighboring SBS of the SBS1 finds the content network slice information, the SBS sends a content finding failure message to the controller of the SBS 1; proceed to step 6.
Step 6: the controller of the SBS1 receives the content search failure message fed back by each SBS, and indicates that the content service request cannot be satisfied at the current micro base station level of the system, the content network slice management module of the SBS1 sends the content service request of S1 to the macro base station connected thereto through the communication module, the content network slice management module in the macro base station controller searches for the content network slice search and record sub-module thereof to obtain corresponding content network slice information, and the content search is finished this time; proceed to step 7-3.
Step 7-1-1: the content network slice searching and recording submodule of the user terminal controller S1 sends the obtained content network slice information to the content obtaining module through the communication module, and the content obtaining module obtains the content information from the content buffering submodule in the content network slice management module according to the content network slice information; after the content information is acquired, the content acquisition module sends content synchronization information to a content network slice synchronization submodule in a content network slice management module, the content network slice synchronization submodule sends a content network slice synchronization updating and maintaining request message based on the content to a content network slice generation system manager, and the content network slice generation system manager starts an NSSM-initiated-CSYN process to finish the content network slice updating process based on the content; step 8 is entered.
Step 7-1-2: the content network slice searching and recording submodule of the user terminal controller receives content network slice information sent by a neighbor user terminal through the communication module, sends the content network slice information to the content acquisition module, and stores or updates the content network slice information based on the content in the content network slice searching and recording submodule; meanwhile, the content obtaining module of the user terminal controller of S1 obtains the content information according to the content network slice information; after the content information is acquired, the content acquisition module sends content synchronization information to a content network slice synchronization submodule in a content network slice management module, the content network slice synchronization submodule sends a content network slice synchronization updating and maintaining request message based on the content to a content network slice generation system manager, and the content network slice generation system manager starts an NSSM-initiated-CSYN process to finish the content network slice updating process based on the content; step 8 is entered.
Step 7-2: a micro base station controller in the SBS1 starts a dynamic content network slice optimization control strategy unit based on a path for acquiring the content information and the identification information of a content cache module storing the content information according to the search result of the content network slice information, completes the content network slice optimization generation based on the CCSOA, and outputs the content network slice information and the content network slice generation information which are generated by optimization; the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the optimization control result distributes corresponding cache resources and communication resources for the content based on the content network slice generation information;
A content acquisition module of a user S1 terminal controller receives content network slice information sent by a content network slice management module of a micro base station controller through a communication module of the terminal, and acquires content information corresponding to a request of the content network slice information according to the content network slice information; after the content is obtained, a content network slice synchronization submodule of a content network slice management module in the micro base station controller sends a content network slice synchronization updating maintenance request message based on the content to a content network slice generation system manager through a communication module, and the content network slice generation system manager starts an NSSM-initiated-CSYN process to complete the content network slice synchronization updating process based on the content; step 8 is entered.
And 7-3: the macro base station controller starts a dynamic content network slice optimization control strategy unit based on the path for acquiring the content information and the identification information of the content cache module storing the content information according to the search result of the content information, completes the content network slice optimization generation process based on the CCSOA aiming at the content service request, and generates and outputs the content network slice information and the content network slice generation information aiming at the content; the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the optimization control result distributes corresponding cache resources and communication resources for the content based on the content network slice generation information, and the content network slice management module of the macro base station controller sends the content network slice information to the user terminal through the communication module of the macro base station controller or sends the content network slice information to the user terminal through the micro base station connected with the user S1; the content network slice management module of the user S1 terminal controller receives the content network slice information and sends the content network slice information to the content acquisition module, and the content acquisition module acquires the content information according to the content network slice information; after the content is obtained, a content network slice synchronization submodule of a content network slice management module of the macro base station controller sends a synchronous updating maintenance request message of the content network slice based on the content to a content network slice generation system manager through a communication module, and the content network slice generation system manager starts an NSSM-initiated-CSYN process to complete the content network slice updating process based on the content; step 8 is entered.
And 8: and the content service request aiming at the user equipment S1, the content network slice information search and content network slice optimization generation process based on the CCSOA and the updating process of the content network slice information are ended.
A CCSOA-based static content network slice optimization generation method for a macro base station controller is given below, referring to fig. 29, fig. 29 is a schematic flow diagram of the CCSOA-based static content network slice optimization generation method for the macro base station controller in the embodiment of the present invention, and the method includes the following steps:
s291: the macro base station controller information acquisition and analysis submodule acquires the number of micro base stations/the number of wireless access points, the number of user terminals, the networking state among nodes and the state information of each content cache in a content cache network in the system, and outputs the network parameters of the current network and the content parameters of the content cache network to the control parameter generation submodule.
The network parameters include, but are not limited to, a networking topological graph among the nodes, degrees of each node, and central betweenness; the content parameters include, but are not limited to, Zip parameters, arrival rate of content service requests, number of contents, capacity of content cache, etc.
S292: and the control parameter generation submodule selects the minimum weighted hop count of the acquired content as an optimization target in the optimization generation process of the static content network slice according to the system state information, the network parameters and the content parameters output by the state information acquisition and analysis module, selects the number of content copies which are not more than a specific threshold value and meet the specific content hit rate expectation as an optimization limiting condition during the optimization generation of the content network slice, and outputs the optimization target and the optimization limiting condition to the static content network slice optimization control strategy unit.
S293: the static content network slice control strategy unit converts the content network slice optimization generation problem into a cache content placement optimization problem aiming at all contents in the system, taking the minimum weighted hop count based on the acquired contents as an optimization target, the number of content copies not more than a given threshold value and the expectation of meeting a given content hit rate as an optimization limiting condition, completes the optimization of the optimization problem based on a CCSOA algorithm, and outputs an optimization control result based on content cache resources and communication resources to a control strategy output and distribution submodule.
The result contains communication resources and content cache resources with content granularity allocated by the system for all content.
S294: and the control strategy output and distribution submodule receives the optimization control strategy result and generates content network slice information and content network slice generation information based on the optimization control result.
And sending the content network slice generation control information corresponding to the optimization control result to a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller related to the optimization control result and/or a content network slice generation control strategy receiving submodule of a user terminal controller, sending the content network slice information to a content network slice searching and recording submodule of a macro base station controller, and updating the content network slice information aiming at all contents by the content network slice searching and recording submodule of the macro base station controller.
S295: and the content network slice generation control strategy receiving submodule of the micro base station controller/wireless access point controller and/or the content network slice generation control strategy receiving submodule of the user terminal controller performs resource allocation according to the received content network slice generation control information to generate a content network slice corresponding to the content.
And in the specific execution process, further returning a content cache optimization resetting success message aiming at the static content network slice generation process to the macro base station controller.
And simultaneously, a content network slice searching and recording submodule in a content network slice management module of the micro base station controller/wireless access point controller and the user controller records and updates the content network slice information, and feeds back the content network slice synchronous updating information to a content network slice synchronous submodule of the micro base station controller/wireless access point controller and the user controller.
S296: and after receiving the content network slice synchronous updating information, a content network slice synchronous updating and maintaining submodule of the user controller sends a content network slice synchronous updating and maintaining request message to the micro base station controller/wireless access point controller to which the user controller belongs.
And the content network slice synchronization submodule of the micro base station controller/the wireless access point controller receives the content network slice synchronization updating information and feeds back a content network slice synchronization updating maintenance request message to the macro base station controller. And the macro base station controller sends a content network slice synchronous updating maintenance request message based on the current content network slice optimization generation process to a content network slice generation system manager so as to complete synchronous updating of content network slice information in the system after the current static content network slice optimization generation process.
S297: the content network slice generation system manager receives a content network slice synchronous updating maintenance request message of the macro base station controller based on the current content network slice optimization generation process, sends a content network slice synchronous updating maintenance request message related to the current optimization generation process to a micro base station controller/wireless access point controller and a user controller which are not related to the current static content network slice optimization generation control process in the system, and completes updating of all content network slice information aiming at the current static content network slice optimization generation process.
In the embodiment of the invention, the optimized generation method of the dynamic content network slice refers to a content network slice optimized generation method based on single content, which is completed by a system aiming at a content service request of a user. The optimized generation method of the dynamic content network slice can be completed by a macro base station controller or a specific micro base station controller, and the optimized generation method of the dynamic content cache network slice based on the CCSOA, which is completed in the macro base station controller and the micro base station controller, is respectively provided below.
The following steps of the method for optimizing and generating the slices of the dynamic content cache network based on the CCSOA, which is completed in the macro base station controller, are provided:
step 1: the macro base station controller receives the user content service request from the micro base station controller and proceeds to step 2.
Step 2: the content network slice management module in the macro base station controller finds the content network slice information and enters the step 3-6.
Step 3-6: and starting a dynamic content network slice optimization generation process based on the content by a content network slice control strategy submodule in the macro base station controller, and entering the step 3-6-1.
Step 3-6-1: an information acquisition and analysis submodule in the macro base station controller acquires the number of all nodes (including a micro base station, a wireless access point and a user terminal) in the system, networking state information among the nodes and content state information cached in a content cache network, analyzes and outputs network parameters and content parameters of the system to a control parameter generation submodule, and then the step 3-6-2 is carried out.
Step 3-6-2: the control parameter generation submodule selects the minimum weighted hop count of the acquired content as an optimization target of the current dynamic content network slice optimization generation process based on the searched content network slice information and the CCSOA algorithm according to the network parameters and the content parameters output by the state information acquisition and analysis submodule, selects the number of content copies not more than a specific threshold value and the expectation of meeting the specific content hit rate as an optimization limiting condition during the current dynamic content network slice optimization generation, generates and outputs the control parameters to a dynamic content network slice optimization control strategy unit based on the CCSOA based on the optimization target and the optimization limiting, and enters the step 3-6-3.
Step 3-6-3: the dynamic content network slice control strategy unit converts the content network slice optimization generation problem into a cache content placement optimization problem which is based on the minimum weighted hop count of the acquired content as an optimization target, the number of content copies which is not more than a specific threshold value and the expectation of meeting the specific content hit rate as an optimization limiting condition, and completes the optimization of the optimization problem based on a CCSOA algorithm; the dynamic content network slice control strategy unit outputs an optimization control result based on content cache resources and communication resources to the control strategy output and distribution submodule, namely the communication resources and the content cache resources distributed by the system for the content are taken as granularity; meanwhile, the macro base station controller updates the content network slice information aiming at the content in the content network slice searching and recording submodule and then the step 3-6-4 is carried out.
Step 3-6-4: the control strategy output and distribution submodule receives the result of the content cache optimization control strategy, generates content network slice information and content network slice generation control information, sends the content network slice generation control information to a content network slice generation control strategy receiving module of a micro base station controller and/or a wireless access point controller related to the optimization control result and/or a content network slice generation control strategy receiving module of a user terminal controller, sends the content network slice information to a user terminal controller S1 requesting the content through the micro base station controller connected with S1, and then the step 3-6-5 is carried out.
Step 3-6-5: the content network slice generation control strategy receiving module of each micro base station controller and/or wireless access point controller and/or user terminal controller related to the optimization control result respectively controls the content cache submodule thereof to carry out content cache reset according to the received content network slice generation control information, controls the corresponding communication resource module to distribute communication resources for the content network slice, and generates the content network slice; each user terminal controller related to the optimization control result sends a content cache optimization resetting success message to the control strategy output and distribution submodule of the micro base station controller to which the user terminal controller belongs, each micro base station controller receives the content cache optimization resetting success message in the optimization generation process, summarizes the information of the message, sends the content cache optimization resetting success message after information combination to the macro base station controller, and the step 4 is entered.
And 4, step 4: and the control strategy output and distribution submodule of the macro base station controller receives a content cache optimization resetting success message from each micro base station/wireless access point controller.
And 5: and the macro base station controller finishes the dynamic content network slice optimization generation process based on the CCSOA.
In the embodiment of the invention, the following flow of the method for optimizing and generating the dynamic content cache network slice based on the CCSOA and completed in the micro base station controller is given:
step 1: the SBS1 receives the content service request from the user, searches the content network slice information in the content network slice management module, and if the content network slice information is found, the step 3-4 is carried out; if the content network slice information of the content is not found, step 2 is entered.
Step 2: the micro base station controller SBS1 makes the SBS2 controller of its neighbor search the content network slice information in its content network slice management module, if the SBS2 controller searches the content network slice information, the SBS2 controller feeds back the content network slice information of the content to the SBS1 micro base station controller, and the step 3-5 is entered; if the SBS2 controller does not find the content network slice information, the micro base station SBS1 sends the content service request to the macro base station and proceeds to step 5.
Step 3-4: the content network slice control policy sub-module in the SBS1 controller initiates a dynamic content network slice optimization generation process based on the content and proceeds to step 3-4-1.
Step 3-4-1: the information acquisition and analysis submodule analyzes and generates network parameters and content parameters of the system according to the acquired number of the user terminals belonging to the micro base station, networking state information among nodes related to the micro base station and content state information cached in the content cache network, inputs the generated network parameters and content parameters into the control parameter generation submodule, and then the step 3-4-2 is carried out.
Step 3-4-2: the control parameter generation submodule selects the minimum weighted hop count of the acquired content as an optimization target of the current dynamic content network slice optimization generation process based on the searched content network slice information and a CCSOA algorithm according to the network parameters and the content parameters output by the state information acquisition and analysis submodule, selects the number of content copies not more than a specific threshold value and the expectation of meeting the specific content hit rate as an optimization limiting condition during the current content network slice optimization generation, generates and outputs the control parameters to the CCSOA-based dynamic content network slice control strategy submodule based on the optimization target and the optimization limiting, and then the step 3-4-3 is carried out.
Step 3-4-3: the dynamic content network slice control strategy unit converts the content network slice optimization generation problem into a cache content placement optimization problem which is based on the minimum weighted hop count of the acquired content as an optimization target, is not more than the content copy number of a specific threshold value and meets the specific content hit rate expectation as an optimization limiting condition, completes the optimization of the optimization problem based on the CCSOA algorithm, and outputs an optimization control result based on content cache resources and communication resources to a control strategy output and distribution submodule, namely, the content is taken as granularity, and the communication resources and the content cache resources distributed by the system for the content; entering the step 3-4-4.
Step 3-4-4: the control strategy output and distribution submodule receives the result of the optimization control strategy and generates content network slice generation control information and content network slice information; the strategy output and distribution submodule sends the content network slice generation control information to a content network slice generation control strategy receiving submodule of a user terminal controller related to the optimization control result, and sends the content network slice information to a user terminal controller of S1 requesting the content; entering the step 3-4-5.
Step 3-4-5: a content network slice generation control strategy receiving submodule of a user terminal controller related to the optimization control result generates control information according to the received content network slice, controls a content cache submodule to carry out content cache optimization resetting, and controls a communication resource module to distribute communication resources for the content network slice; after the resource allocation is completed, the content network slice generation control strategy receiving submodule of the user terminal controller related to the optimization control result sends a content cache optimization resetting success message to a micro base station controller triggering the optimization generation process of the content network slice; step 4 is entered.
Step 3-5: the content network slice control strategy sub-module of the SBS1 controller starts a dynamic content network slice optimization generation process based on the content network slice information fed back by the SBS2 controller of the neighbor, and the step proceeds to the step 3-5-1.
Step 3-5-1: the information acquisition and analysis submodule in the SBS1 controller acquires the number of user terminals controlled by the micro base station SBS1, networking state information of nodes related to the SBS1 and content state information of the content cache network and each content cache, analyzes and outputs network parameters and content parameters to the control parameter generation submodule, and the step 3-5-2 is carried out.
Step 3-5-2: the control parameter generation submodule of the SBS1 controller acquires and analyzes the network parameters and the content parameters output by the submodule according to the state information, based on the content network slice information searched by the neighbor micro base station controller, based on the CCSOA algorithm, selects the minimum weighted hop count of the acquired content as the optimization target of the optimization generation process of the dynamic content network slice, selects the number of content copies which are not more than a specific threshold value and meet the specific content hit rate expectation as the optimization limiting condition when the content network slice is optimized and generated, generates and outputs the control parameters to the dynamic content network slice control strategy unit based on the CCSOA based on the optimization target and the optimization limitation, and then the step 3-5-3 is carried out.
Step 3-5-3: the dynamic content network slice control strategy unit converts the optimization generation problem of the content network slice into a cache content placement optimization problem which is based on the minimum weighted hop count of the acquired content as an optimization target, the number of content copies which is not more than a specific threshold value and the expectation of meeting the specific content hit rate as an optimization limiting condition, completes the optimization of the optimization problem based on a CCSOA algorithm and generates the content network slice; outputting an optimized control strategy result based on the content cache resources and the communication resources to a control strategy output and distribution submodule, namely, taking the content as granularity, and distributing the communication resources and the content cache resources to the content by a system; and entering the step 3-5-4.
Step 3-5-4: the control strategy output and distribution submodule receives the optimization control result, generates content network slice generation control information and content network slice information based on the optimization control result, sends the corresponding content network slice generation control information to a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the current optimization control result, sends the content network slice information to a user terminal controller S1, and the steps are 3-5-5.
Step 3-5-5: a content network slice generation control strategy receiving submodule of a micro base station controller and/or a wireless access point controller and/or a user terminal controller related to the optimization control result generates control information according to the received content network slice, controls a content cache submodule to carry out content cache resetting, and controls a communication resource module to distribute communication resources for the content network slice to generate the content network slice; after the resource allocation is completed, the micro base station controller and/or the wireless access point controller and/or the user terminal controller related to the current optimization control result sends a content cache optimization resetting success message to the micro base station controller SBS1 triggering the current dynamic content network slice optimization generation process; and proceeds to step 4.
And 4, step 4: and the control strategy output and distribution submodule of the micro base station controller receives a content cache optimization resetting success message fed back by each user terminal controller related to the optimization control result and the micro base station controller.
And 5: and finishing the dynamic content network slice optimization generation process of the micro base station based on the CCSOA.
It should be noted that the flow of the CCSOA-based dynamic content network slice optimization generation process performed by the micro base station controller given above may also be used for the optimization generation of the dynamic content network slice of the radio access point controller.
In the embodiment of the present invention, in the network scenario shown in fig. 2, when the user equipment S1 issues a content service request, the system will trigger the optimized generation process of the dynamic content network slice for the content service request. After the search process of the content information is finished, the resource allocation process in the mobile wireless access network based on the search result of the current time, including the allocation of content cache resources and communication resources, is finished, and finally, a content network slice aiming at the content is generated in the current mobile wireless access network.
The following given system searches content based on a content service request sent by a user, generates a content network slice based on the content by triggering a dynamic content network slice optimization generation process, and completes a response service process of the content service request of the user, and the specific steps of the process are as follows:
step 1: the user terminal controller of S1 generates a content service request message in the message generating and receiving module according to the operation of the user requesting the content service; the message generating and receiving module extracts the content information identifier and sends the content information identifier to a content network slice management module of the user terminal controller of S1; the content network slice management module in the user terminal controller in S1 searches for the content network slice information, and if the content network slice information is found, the process goes to step 7-1; if the content network slice information is not found, the content service request is sent to the neighbor user terminal controller of S1, and step 2 is entered.
Step 2: the content network slice management module in the neighbor user terminal controller of the user terminal S1 searches for content network slice information, and if the content network slice information is found, the step 7-2 is performed; if the neighbor user terminal does not find the content network slice information, a content search failure message based on the content is returned to the user terminal controller S1, and the process proceeds to step 3.
And step 3: the user terminal S1 selects the user terminal device S2 with the highest medium value of its neighboring user terminals, and sends the content service request to the user terminal controller of S2 to request it to search the content information; s2, the user terminal controller makes the neighbor user terminal controller search the content network slice information corresponding to the content in the content network slice management module, if the content network slice information is searched, the step 7-3 is proceeded; if the content network slice information is not found, a content search failure message is returned to the user terminal controller of S1, and the user terminal controller of S1 sends a content service request to the SBS1 connected thereto, and proceeds to step 4.
And 4, step 4: the micro base station controller of the micro base station SBS1 connected to S1 performs a CCSOA-based Dynamic content network slice optimization generation process (i.e., a CCSOA-based Dynamic-SBS1 process).
Step 4-1: judging whether content network slice information corresponding to the requested content is found when the Dynamic-SBS1 process based on the CCSOA is finished, if not, the micro base station controller SBS1 sends the content service request to the macro base station controller MBS1 to which the micro base station controller SBS1 belongs, the MBS1 executes the Dynamic content network slice optimization generation process based on the CCSOA (namely the Dynamic-MBS1 process based on the CCSOA), and S1 the user terminal controller obtains the content according to the received updated content network slice information; entering a step 8; if yes, S1 the user terminal controller obtains the content according to the received updated content network slice information; step 8 is entered.
Step 7-1: s1 the management module of the content network slice in the user terminal controller updates the content network slice information for the content, S1 obtains the content according to the updated content network slice information; step 8 is entered.
Step 7-2: s1 the content network slice management module in the user terminal controller selects the content network slice information searched by one of the neighboring user terminal controllers, and based on the content network slice information, updates the content network slice information aiming at the content in the content network slice searching and recording submodule S1, and S1 obtains the content according to the updated content network slice information; step 8 is entered.
And 7-3: s2, the content network slice management module in the user terminal controller selects the content network slice information searched by one of the neighbor device controllers; s2 the content network slice management module in the user terminal controller updates the information of the content network slice and sends the content network slice information to S1; s1 the content network slice management module in the user terminal controller updates the information of the content network slice; s1, the user terminal controller obtains the content according to the updated content network slice information; step 8 is entered.
And 8: the content searching is carried out based on the content service request sent by the user, the content network slice based on the content is generated by triggering the dynamic content network slice optimization generation process based on the CCSOA, and the response service process of the content service request of the user is completed.
In the embodiment, by collecting the state information required in the process of generating the mobile wireless access network content network slice, and determines network parameters and content parameters according to the current communication resource state information, content resource state information and content service request state information, and generates corresponding control parameters according to the collected state information, network parameters and content parameters, and generating the mobile wireless access network content network slice in a static and/or dynamic mode according to the corresponding control parameter, thereby improving the request hit rate of the content service, reducing the access delay of the content service, generating the content network slice through optimization, the resource utilization efficiency of the wireless access network can be improved, the content flow load from the mobile wireless access network to the core network can be reduced, and the purposes of reducing the operation cost and the investment expenditure of the content service can be finally achieved.
Fig. 30 is a schematic structural diagram of a mobile radio access network content network slice generation system according to an embodiment of the present invention.
Referring to fig. 30, the system 300 includes:
an acquisition module 301, configured to enable a first controller to acquire state information required in a process of generating a content network slice of the mobile radio access network, and determine a network parameter and a content parameter according to current communication resource state information, content resource state information, and content service request state information;
a first generating module 302, configured to generate corresponding control parameters according to the acquired state information, the network parameters, and the content parameters;
a second generating module 303, configured to generate the mobile radio access network content network slice in a static and/or dynamic manner according to the corresponding control parameter;
the second generating module 303 includes:
a first generating unit 3031, configured to perform content network slicing on all or part of the content cached in the mobile radio access network according to the corresponding control parameter and based on a target network performance index and/or a user content quality of service index, so as to obtain a plurality of content network slices, where each content network slice includes a communication resource and a content cache resource that need to be allocated to the content network slice;
A second generating unit 3032, configured to perform content network slicing on the requested content in the mobile radio access network according to the content service request sent by the second controller/the third controller controlled by the first controller and the corresponding control parameter, based on the target network performance index and/or the user content service quality index, to obtain a single content network slice, where each content network slice includes a communication resource and a content cache resource that need to be allocated to the content network slice;
the types of the first controller, the second controller, and the third controller may be any one of a macro base station level controller, a micro base station level controller, and a radio access point controller.
Optionally, in some embodiments, the first controller is a ue controller, and when the first controller is the ue controller, the second controller/third controller is a controller on the ue side other than the first controller in the mobile radio access network.
Optionally, the status information includes, but is not limited to: the number of the second controller/the third controller controlled by the first controller, the first communication related state information between the first controller and the second controller/the third controller, the number of the user terminals controlled by the first controller, the second communication related state information between the second controller/the third controller, the third communication related state information between the second controller/the third controller and the user terminals, the third communication related state information between the plurality of user terminals, the content cache related information to which each controller belongs, and the content service request state information.
Optionally, in some embodiments, referring to fig. 31, the system 300 further comprises:
a first receiving module 304, configured to enable the first controller to receive the content network slice synchronous update maintenance request message sent by the second controller/third controller, and perform synchronous update on the content network slice information corresponding to the content network slice synchronous update maintenance request message according to the content identification information in the synchronous update maintenance request message.
Optionally, in some embodiments, the first generating unit 3031 is specifically configured to:
enabling the first controller to determine whether a system performance index indicated by the acquired state information reaches a preset threshold value, and triggering to generate the mobile wireless access network content network slice in a static form according to the corresponding control parameter when the system performance index does not reach the preset threshold value;
the generating the mobile radio access network content network slice in a static form comprises:
determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance;
performing content network slicing on all or part of the content cached in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value to obtain a plurality of content network slices;
Wherein the optimization objectives include, but are not limited to: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes but is not limited to: the method comprises the steps of setting a preset threshold corresponding to resources of a communication link, setting a preset threshold corresponding to time delay of content access and a maximum hop parameter, and setting a preset threshold corresponding to a cost value of acquired content.
Optionally, in some embodiments, the second generating unit 3032 is specifically configured to:
determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance;
inquiring the content service request to which the state information of the content service request belongs, and obtaining the content information requested by the user in the content service request;
generating a content network slice of the content for the content requested in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value, and obtaining a single content network slice based on the content;
Wherein the optimization objectives include, but are not limited to: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes but is not limited to: the method comprises the steps of setting a preset threshold corresponding to resources of a communication link, setting a preset threshold corresponding to delay of content access and a maximum hop parameter, and setting a preset threshold corresponding to a cost value of acquired content.
Optionally, in some embodiments, referring to fig. 31, the system 300 further comprises:
a second receiving module 305, configured to enable the first controller to receive the content service request sent by the second controller/third controller, query corresponding content network slice information according to content identification information in the content service request, and send the corresponding content network slice information to the second controller/third controller.
The partition configuration module 306 is configured to partition and configure the cache space of the content cache corresponding to each controller to obtain a first cache space and a second cache space corresponding to each controller, configure the first cache space as an autonomously managed content cache space, and configure the second cache space as a controlled managed content cache space, where the autonomously managed content cache space is managed by a controller to which the autonomously managed content cache space belongs, and the controlled managed content cache space is controlled and managed based on a corresponding content cache optimization control result when the content network slice is generated.
A content cache control module 307, configured to generate a controlled content cache management mechanism according to content cache optimization reset result information output by a controller to which a second cache space belongs, so as to reset the content cached in the second cache space;
performing content cache control based on the autonomous content cache management rule on the content of the first cache space according to the autonomous content cache management rule initialized by the system;
the autonomous content caching control mechanism includes a content insertion mechanism and a content removal mechanism, and the content insertion mechanism includes but is not limited to: probabilistic caching and random cache content insertion mechanisms, content removal mechanisms including, but not limited to: a least recently used algorithm LRU and a least frequently used algorithm LFU, and a content removal mechanism that periodically removes cached content according to a preset time period.
And a content cache management module 308, configured to manage, based on the generated multiple content network slices, content caches related to the first controller, the second controller, the third controller, and a content cache optimization control result corresponding to the content network slice generated when the user terminal controller belongs to.
A content reading module 309, configured to locate a cache space where the content is stored according to the path information in the corresponding content network slice information, read the content corresponding to the content identification information from the stored cache space, and send the corresponding content network slice information and the corresponding content to the second controller/third controller.
Optionally, in some embodiments, the second receiving module 305 is specifically configured to:
inquiring corresponding content network slice information in a content network slice management module according to the content identification information in the content service request;
if the corresponding content network slice information is obtained through inquiry, the corresponding content network slice information is issued to the second controller/the third controller;
and if the corresponding content network slice information is not obtained through inquiry, forwarding the content service request to a controller adjacent to the first controller so that the adjacent controller inquires the corresponding content network slice information according to the content identification information in the content service request.
The second receiving module 305 is further specifically configured to:
And if the adjacent controller does not inquire to obtain the corresponding content network slice information, forwarding the content service request to a superior controller for controlling the adjacent controller so that the superior controller inquires the corresponding content network slice information according to the content identification information in the content service request.
It should be noted that the foregoing explanation of the embodiment of the method for generating slices of content networks of a mobile radio access network is also applicable to the system for generating slices of content networks of a mobile radio access network of the embodiment, and therefore will not be described herein again.
In the embodiment, by collecting the state information required in the process of generating the mobile wireless access network content network slice, and determines network parameters and content parameters according to the current communication resource state information, content resource state information and content service request state information, and generates corresponding control parameters according to the collected state information, network parameters and content parameters, and generating the mobile wireless access network content network slice in a static and/or dynamic mode according to the corresponding control parameter, thereby improving the request hit rate of the content service, reducing the access delay of the content service, generating the content network slice through optimization, the resource utilization efficiency of the wireless access network can be improved, the content flow load from the mobile wireless access network to the core network can be reduced, and the purposes of reducing the operation cost and the investment expenditure of the content service can be finally achieved.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (24)

1. A method for generating mobile wireless access network content network slices is applied to a mobile wireless access network, and is characterized by comprising the following steps:
the first controller collects state information required in the process of generating the mobile wireless access network content network slicing, and determines network parameters and content parameters according to the current communication resource state information, the content resource state information and the content service request state information;
generating corresponding control parameters according to the acquired state information, the network parameters and the content parameters;
generating the mobile wireless access network content network slice in a static and/or dynamic form according to the corresponding control parameter;
the generating the mobile radio access network content network slice in a static form according to the corresponding control parameter comprises:
according to the corresponding control parameters, based on target network performance indexes and/or user content service quality indexes, performing content network slicing on all or part of content cached in the mobile wireless access network to obtain a plurality of content network slices, wherein each content network slice comprises communication resources and content cache resources which need to be allocated to the content network slice;
The method for generating the mobile wireless access network content network slice by adopting the static content network slice optimization generation method according to the corresponding control parameters comprises the following steps: determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance; performing content network slicing on all or part of contents cached in a mobile wireless access network based on a target network performance index and/or a user content service quality index according to an optimization target and a corresponding preset threshold value to obtain a plurality of content network slices; wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content; the corresponding preset threshold includes: a preset threshold corresponding to the bandwidth of the communication link, a preset threshold corresponding to the maximum hop count of content access, and a preset threshold corresponding to the cost value of the acquired content;
the generating the mobile radio access network content network slice in a dynamic form according to the corresponding control parameter comprises:
according to the content service request sent by the second controller/the third controller controlled by the first controller and the corresponding control parameter, based on the target network performance index and/or the user content service quality index, performing content network slicing on the requested content in the mobile wireless access network to obtain a single content network slice, wherein each content network slice comprises communication resources and content cache resources required to be allocated to the content network slice;
The method for generating the content network slice in the mobile wireless access network by adopting the dynamic content network slice optimization generation method according to the corresponding control parameters comprises the following steps: receiving the content service request to which the content service request state information belongs to obtain a requested content information identifier; determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance; generating a content network slice of the content for the content requested in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value, and obtaining a single content network slice based on the content; wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content; the corresponding preset threshold includes: a preset threshold corresponding to the bandwidth of the communication link, a preset threshold corresponding to the maximum hop count of content access, and a preset threshold corresponding to the cost value of the acquired content;
The types of the first controller, the second controller and the third controller may be any one of a macro base station controller, a micro base station controller and a wireless access point controller;
further comprising:
dividing and configuring the cache space of the content cache corresponding to each controller to obtain a first cache space and a second cache space corresponding to each controller;
configuring the first cache space as an autonomously managed content cache space, and configuring the second cache space as a controlled managed content cache space, wherein the autonomously managed content cache space is managed by a controller to which the autonomously managed content cache space belongs, and the controlled managed content cache space is controlled and managed based on a corresponding content cache optimization control result when a content network slice is generated.
2. The mobile radio access network content network slice generation method of claim 1, wherein,
the state information includes: the number of the second controller/the third controller controlled by the first controller, the first communication related state information between the first controller and the second controller/the third controller, the number of the user terminals controlled by the first controller, the second communication related state information between the second controller/the third controller, the third communication related state information between the second controller/the third controller and the user terminals, the third communication related state information between the plurality of user terminals, the content cache related information to which each controller belongs, and the content service request state information.
3. The mobile radio access network content network slice generation method of claim 1, further comprising:
and the first controller receives the content network slice synchronous updating maintenance request message sent by the second controller/the third controller, and synchronously updates the content network slice information corresponding to the content network slice synchronous updating maintenance request message according to the content identification information in the synchronous updating maintenance request message.
4. The method for generating slices of content networks of mobile radio access networks according to claim 1, wherein the generating slices of content networks of mobile radio access networks in a static form according to the corresponding control parameters comprises:
the first controller determines whether the system performance index indicated by the acquired state information reaches a preset threshold value, and triggers the generation of the mobile wireless access network content network slice in a static form according to the corresponding control parameter when the system performance index indicated by the acquired state information does not reach the preset threshold value;
the generating the mobile radio access network content network slice in a static form comprises:
determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance;
Performing content network slicing on all or part of the content cached in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value to obtain a plurality of content network slices;
wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes: the method comprises the steps of setting a preset threshold corresponding to resources of a communication link, setting a preset threshold corresponding to time delay of content access and a maximum hop parameter, and setting a preset threshold corresponding to a cost value of acquired content.
5. The method for generating slices of content networks of mobile radio access networks according to claim 1, wherein the generating slices of content networks of mobile radio access networks in a dynamic form according to the corresponding control parameters comprises:
determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance;
inquiring the content service request to which the state information of the content service request belongs, and obtaining the content information requested by the user in the content service request;
Generating a content network slice of the content for the content requested in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value, and obtaining a single content network slice based on the content;
wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes: the method comprises the steps of setting a preset threshold corresponding to resources of a communication link, setting a preset threshold corresponding to delay of content access and a maximum hop parameter, and setting a preset threshold corresponding to a cost value of acquired content.
6. The mobile radio access network content network slice generation method of claim 1, further comprising:
the first controller receives the content service request sent by the second controller/the third controller, inquires corresponding content network slice information according to the content identification information in the content service request, and sends the corresponding content network slice information to the second controller/the third controller.
7. The mobile radio access network content network slice generation method of claim 1, further comprising:
the first controller generates a controlled content cache management mechanism according to content cache optimization reset result information output by a controller to which a second cache space belongs so as to reset the cached content in the second cache space;
performing content cache control based on the autonomous content cache management rule on the content of the first cache space according to the autonomous content cache management rule initialized by the system;
the autonomous content caching control mechanism comprises a content insertion mechanism and a content removal mechanism, wherein the content insertion mechanism comprises: probabilistic caching and random caching content insertion mechanisms, the content removal mechanism comprising: a least recently used algorithm LRU and a least frequently used algorithm LFU, and a content removal mechanism that periodically removes cached content according to a preset time period.
8. The method of claim 1, wherein the first controller is a ue controller, and when the first controller is the ue controller, the second controller/third controller is a controller on the ue side except the first controller in the mobile radio access network.
9. The mobile radio access network content network slice generation method of claim 8, further comprising:
and managing the first controller, the second controller, the third controller and the content cache related to the content cache optimization control result corresponding to the content network slice generated when the user terminal controller belongs based on the generated plurality of content network slices.
10. The mobile radio access network content network slice generation method of claim 3, wherein the content network slice information comprises: the method comprises the steps of obtaining content identification information, cache space identification of content storage, and path information of a cache space corresponding to the cache space identification, and the method also comprises the following steps:
positioning a cache space in which the content is stored according to path information in the corresponding content network slice information;
and reading the content corresponding to the content identification information from the stored cache space, and sending the corresponding content network slice information and the corresponding content to the second controller/third controller.
11. The method as claimed in claim 6, wherein the number of the first controller is at least one, and the first controller receives the content service request sent by the second controller/the third controller, queries corresponding content network slice information according to the content identification information in the content service request, and sends the corresponding content network slice information to the second controller/the third controller, including:
The first controller inquires corresponding content network slice information in a content network slice management module according to the content identification information in the content service request;
if the corresponding content network slice information is obtained through inquiry, the corresponding content network slice information is issued to the second controller/the third controller;
and if the corresponding content network slice information is not obtained through inquiry, forwarding the content service request to a controller adjacent to the first controller so that the adjacent controller inquires the corresponding content network slice information according to the content identification information in the content service request.
12. The mobile radio access network content network slice generating method of claim 11, wherein when the first controller is any one of the micro base station level controller, the radio access point controller, and the user terminal controller, further comprising:
and if the adjacent controller does not inquire to obtain the corresponding content network slice information, forwarding the content service request to a superior controller for controlling the adjacent controller so that the superior controller inquires the corresponding content network slice information according to the content identification information in the content service request.
13. A mobile radio access network content network slice generation system, comprising:
the acquisition module is used for enabling the first controller to acquire state information required in the process of generating the mobile wireless access network content network slicing and determining network parameters and content parameters according to the current communication resource state information, the content resource state information and the content service request state information;
the first generation module is used for generating corresponding control parameters according to the acquired state information, the network parameters and the content parameters;
a second generation module, configured to generate the mobile radio access network content network slice in a static and/or dynamic manner according to the corresponding control parameter;
the second generation module includes:
a first generating unit, configured to perform content network slicing on all or part of the content cached in the mobile radio access network according to the corresponding control parameter and based on a target network performance index and/or a user content quality of service index, so as to obtain a plurality of content network slices, where each content network slice includes a communication resource and a content cache resource that need to be allocated to the content network slice;
The method for generating the mobile wireless access network content network slice by adopting the static content network slice optimization generation method according to the corresponding control parameters comprises the following steps: determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance; performing content network slicing on all or part of contents cached in a mobile wireless access network based on a target network performance index and/or a user content service quality index according to an optimization target and a corresponding preset threshold value to obtain a plurality of content network slices; wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content; the corresponding preset threshold includes: a preset threshold corresponding to the bandwidth of the communication link, a preset threshold corresponding to the maximum hop count of content access, and a preset threshold corresponding to the cost value of the acquired content;
a second generating unit, configured to perform content network slicing on the content requested in the mobile radio access network according to the content service request sent by the second controller/third controller controlled by the first controller and the corresponding control parameter, based on the target network performance index and/or the user content service quality index, so as to obtain a single content network slice, where each content network slice includes a communication resource and a content cache resource that need to be allocated to the content network slice;
The method for generating the content network slice in the mobile wireless access network by adopting the dynamic content network slice optimization generation method according to the corresponding control parameters comprises the following steps: receiving the content service request to which the content service request state information belongs to obtain a requested content information identifier; determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance; generating a content network slice of the content for the content requested in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value, and obtaining a single content network slice based on the content; wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content; the corresponding preset threshold includes: a preset threshold corresponding to the bandwidth of the communication link, a preset threshold corresponding to the maximum hop count of content access, and a preset threshold corresponding to the cost value of the acquired content;
The types of the first controller, the second controller and the third controller may be any one of a macro base station controller, a micro base station controller and a wireless access point controller;
further comprising:
the partition configuration module is used for partitioning and configuring the cache space of the content cache corresponding to each controller to obtain a first cache space and a second cache space corresponding to each controller, configuring the first cache space as an autonomously managed content cache space, and configuring the second cache space as a controlled managed content cache space, wherein the autonomously managed content cache space is managed by the controller to which the autonomously managed content cache space belongs, and the controlled managed content cache space is controlled and managed based on a corresponding content cache optimization control result when the content network slice is generated.
14. The mobile radio access network content network slice generation system of claim 13, wherein,
the state information includes: the number of the second controller/the third controller controlled by the first controller, the first communication related state information between the first controller and the second controller/the third controller, the number of the user terminals controlled by the first controller, the second communication related state information between the second controller/the third controller, the third communication related state information between the second controller/the third controller and the user terminals, the third communication related state information between the plurality of user terminals, the content cache related information to which each controller belongs, and the content service request state information.
15. The mobile radio access network content network slice generation system of claim 13, further comprising:
and the first receiving module is used for enabling the first controller to receive the content network slice synchronous updating maintenance request message sent by the second controller/the third controller, and synchronously updating the content network slice information corresponding to the content network slice synchronous updating maintenance request message according to the content identification information in the synchronous updating maintenance request message.
16. The system for generating mobile radio access network content network slices of claim 13, wherein the first generating unit is specifically configured to:
enabling the first controller to determine whether a system performance index indicated by the acquired state information reaches a preset threshold value, and triggering to generate the mobile wireless access network content network slice in a static form according to the corresponding control parameter when the system performance index does not reach the preset threshold value;
the generating the mobile radio access network content network slice in a static form comprises:
determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance;
Performing content network slicing on all or part of the content cached in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value to obtain a plurality of content network slices;
wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes: the method comprises the steps of setting a preset threshold corresponding to resources of a communication link, setting a preset threshold corresponding to time delay of content access and a maximum hop parameter, and setting a preset threshold corresponding to a cost value of acquired content.
17. The system for generating network slices of content for a mobile radio access network of claim 13, wherein the second generating unit is specifically configured to:
determining an optimization target according to the network parameters and the content parameters, and acquiring a corresponding preset threshold value configured for the acquired state information in advance;
inquiring the content service request to which the state information of the content service request belongs, and obtaining the content information requested by the user in the content service request;
Generating a content network slice of the content for the content requested in the mobile wireless access network based on a target network performance index and/or a user content service quality index according to the optimization target and the corresponding preset threshold value, and obtaining a single content network slice based on the content;
wherein the optimization objective comprises: the hit rate of each content in the content service request of the user level, the resource usage amount of the communication link, the usage rate of the communication link and the access delay of the content;
the corresponding preset threshold includes: the method comprises the steps of setting a preset threshold corresponding to resources of a communication link, setting a preset threshold corresponding to delay of content access and a maximum hop parameter, and setting a preset threshold corresponding to a cost value of acquired content.
18. The mobile radio access network content network slice generation system of claim 13, further comprising:
and the second receiving module is used for enabling the first controller to receive the content service request sent by the second controller/the third controller, inquiring corresponding content network slice information according to the content identification information in the content service request, and sending the corresponding content network slice information to the second controller/the third controller.
19. The mobile radio access network content network slice generation system of claim 13, further comprising:
the content cache control module is used for generating a controlled content cache management mechanism according to content cache optimization reset result information output by a controller to which the second cache space belongs so as to reset the cached content in the second cache space;
performing content cache control based on the autonomous content cache management rule on the content of the first cache space according to the autonomous content cache management rule initialized by the system;
the autonomous content caching control mechanism comprises a content insertion mechanism and a content removal mechanism, wherein the content insertion mechanism comprises: probabilistic caching and random caching content insertion mechanisms, the content removal mechanism comprising: a least recently used algorithm LRU and a least frequently used algorithm LFU, and a content removal mechanism that periodically removes cached content according to a preset time period.
20. The mobile radio access network content network slice generating system of claim 13, wherein the first controller is a user terminal controller, and when the first controller is the user terminal controller, the second controller/third controller is a controller on the user terminal side other than the first controller in the mobile radio access network.
21. The mobile radio access network content network slice generation system of claim 20, further comprising:
and the content cache management module is used for managing the first controller, the second controller, the third controller and content caches related to content cache optimization control results corresponding to the content network slices generated when the user terminal controller belongs to the content cache management module based on the generated plurality of content network slices.
22. The mobile radio access network content network slice generation system of claim 15, wherein the content network slice information comprises: the system comprises content identification information, a cache space identification of the content storage, and path information of a cache space corresponding to the cache space identification, and further comprises:
and the content reading module is used for positioning the cache space in which the content is stored according to the path information in the corresponding content network slice information, reading the content corresponding to the content identification information from the stored cache space, and sending the corresponding content network slice information and the corresponding content to the second controller/third controller.
23. The system for generating network slices of content of a mobile radio access network as claimed in claim 18, wherein said second receiving module is specifically configured to:
inquiring corresponding content network slice information in a content network slice management module according to the content identification information in the content service request;
if the corresponding content network slice information is obtained through inquiry, the corresponding content network slice information is issued to the second controller/the third controller;
and if the corresponding content network slice information is not obtained through inquiry, forwarding the content service request to a controller adjacent to the first controller so that the adjacent controller inquires the corresponding content network slice information according to the content identification information in the content service request.
24. The system for generating mobile radio access network content network slices of claim 23, wherein the second receiving module is further specifically configured to:
and if the adjacent controller does not inquire to obtain the corresponding content network slice information, forwarding the content service request to a superior controller for controlling the adjacent controller so that the superior controller inquires the corresponding content network slice information according to the content identification information in the content service request.
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