CN113115366B - Method, device and system for placing different service businesses into mobile edge node - Google Patents
Method, device and system for placing different service businesses into mobile edge node Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- H04W28/00—Network traffic management; Network resource management
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- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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Abstract
The embodiment of the invention discloses a method, a device and a system for placing different service into a mobile edge node, wherein the mobile edge node in the embodiment of the invention selects at least one most preferred service content data according to the preference degree of the service content data on the premise of meeting the current idle storage capacity of the mobile edge node, and then sends a backup request to a network entity for managing the most preferred service content data; after receiving a plurality of backup requests, the network entity managing the content data of the most preferred service selects the mobile edge nodes with backup limited number according to the preference degree of the mobile edge nodes sending the backup requests, and sends the content data of the service to the selected mobile edge nodes for storage. Therefore, the embodiment of the invention can reasonably place the content data of the service business which is most needed by the user in the mobile edge node.
Description
Technical Field
The present invention relates to a technology for storing content data by a mobile edge node in a network, and in particular, to a method, an apparatus, and a system for placing different service services into a mobile edge node.
Background
As a novel network architecture, the content data related to part of service services can be migrated from a remote central node to a mobile edge node represented by a cellular base station or/and a WI-FI access point. In this way, when processing the service requested by the user, the content data involved in the service is directly retrieved from the corresponding mobile edge node. In a mobile network, when processing a service requested by a user, a method of directly retrieving content data related to the service from a corresponding mobile edge node is called a mobile edge computing method. Compared with the traditional centralized cloud computing mode, the mobile edge computing mode is a mode adopted by directly calling content data related to service business from the central node and processing the service business requested by a user, can reduce transmission delay of a mobile network and avoid network congestion and other problems, and improves the experience degree of the user in the mobile service process.
When a mobile edge computing mode is adopted to process service services requested by a user, for content data related to different service services, based on the distribution situation of user requirements and the storage resource capacity situation of mobile edge nodes, determining which content data related to different service services are placed in which mobile edge nodes is the most important problem.
At present, with intensive service services involving a large amount of content data, such as virtual reality or augmented reality, which are continuously promoted in a mobile network, the content data of the service services are placed at a mobile edge node, and the service services requested by a user can be processed close to a user side, so that the service response time is effectively reduced, and the communication traffic for obtaining the content data of the service services to a central node and the centralized processing resources of the central node are reduced. However, because the storage resources of the mobile edge node are limited, how to reasonably place the content data of the service that the mobile edge node covers the most needs of the user in the mobile edge node to improve the performance of the mobile edge calculation becomes a problem to be solved urgently.
Disclosure of Invention
In view of this, the embodiments of the present invention provide a method for placing different service services into a mobile edge node, where the method can reasonably place content data covering a service most needed by a user in the mobile edge node.
The embodiment of the invention also provides a device for placing different service services into the mobile edge node, and the device can reasonably place the content data of the service services which are most needed by the coverage user in the mobile edge node.
The embodiment of the invention also provides a system for placing different service services into the mobile edge node, and the system can reasonably place the content data of the service services which are most needed by the coverage user in the mobile edge node.
The invention is realized by the following steps:
a method of differentiated services placement in a mobile edge node, the method comprising:
the mobile edge node selects at least one most preferred service content data from the mobile edge node according to the preference degree of the service content data on the premise of meeting the current idle storage capacity of the mobile edge node, and then sends a backup request to a network entity managing the most preferred service content data;
after receiving multiple backup requests, the network entity managing the content data of the most preferred service selects the mobile edge nodes with backup limited number according to the preference degree of the mobile edge nodes sending the backup requests, and sends the content data of the service to the selected mobile edge nodes for storage.
Preferably, the determining process of the mobile edge node comprises:
acquiring a mobile edge node set of content data of a service to be placed in a mobile network;
and selecting at least one mobile edge node to be placed with the content data of the service from the mobile edge node set as the determined mobile edge node.
Preferably, the acquiring a set of mobile edge nodes for content data of service to be placed in a mobile network includes:
determining whether the mobile edge node set is not empty, and if so, executing the subsequent steps; if not, the mobile edge node in the mobile network and the content data of the service preferred by the mobile edge node are provided.
Preferably, the selecting, by the mobile edge node, the content data of the at least one most preferred service from the preference degrees for the content data of the service services comprises:
establishing a preference model matrix for the content data of the service business of the mobile edge node;
obtaining the preference degree of the mobile edge node for the content data of each service business by adopting a preference model matrix;
and selecting the content data of the service business meeting the current idle storage capacity of the mobile edge node from the content data of each service business according to the preference degree as the content data of the service business most preferred by the mobile edge node.
Preferably, the preference model matrix is established for the content data of the service of the mobile edge node as
Comprises the following steps:
Where l represents the moving edge node ε n The l-th user that can provide the service,
is a moving edge node epsilon n Set of all users that can be served, user
Content data for a service
Is modeled as p l,c ：
Wherein alpha is m,c Is influencing the user
Content data for a service
Parameter of preference, α m ＝∑ c α m,c ，q c Is content data to a certain service
The measure of preference:
where β is a correction factor.
Preferably, the selecting the mobile edge nodes with the backup limit number according to the preference degree of the mobile edge nodes sending the backup requests includes:
establishing a preference model matrix of a mobile edge node sending a backup request aiming at the content data of the most preferred service business;
determining the preference degree of the content data of the most preferred service business to each mobile edge node sending the backup request by adopting the preference model matrix;
and selecting the mobile edge nodes meeting the backup limit number from the determined mobile edge nodes according to the preference degree.
Preferably, the establishing a preference model matrix of the mobile edge node sending the backup request for the content data of the best preferred service is as follows:
wherein the content of the first and second substances,
represents a matrix of dimensions C x N,
is a moving edge node epsilon n Can serve a set of all users, where l represents the mobile edge node ε n The ith user of the service that can be provided,
is the l-th user from the moving edge node epsilon n The transmission delay of the acquired content data of the service business comprises the following steps:
V l,n representing a slave mobile edge node
To the user
Of the content data of the service trafficLength of B c A byte.
An apparatus for placing content data of different service services in a mobile edge node, the apparatus being a mobile edge node, comprising: a first preference determining unit and a first transceiving unit, wherein,
a first preference determining unit, configured to select, according to a preference degree for content data of a service, content data of at least one most preferred service from the content data of the service on the premise that a current idle storage capacity of a mobile edge node is satisfied;
a first transceiving unit for sending a backup request to a network entity managing content data of the preferred service; and receiving and storing the content data of the most preferred service business.
An apparatus for placing different services in a mobile edge node, the apparatus being a network entity managing content data of services most preferred by the mobile edge node, comprising: a second preference determining unit and a second transceiving unit, wherein,
a second preference determining unit, configured to select a backup limited number of mobile edge nodes from the preference degrees of the mobile edge nodes that send the backup request;
a second transceiving unit, configured to send the content data of the service to the selected mobile edge node, so that the selected mobile edge node stores the content data of the service.
A system for placing different services in a mobile edge node, comprising a mobile edge node and a network entity managing content data of services most preferred by the mobile edge node, wherein,
the mobile edge node is used for selecting at least one piece of content data of the most preferred service business from the preference degrees of the content data of the service businesses on the premise of meeting the current idle storage capacity of the mobile edge node, and then sending a backup request to a network entity for managing the content data of the most preferred service business; receiving and storing the content data of the most preferred service business;
and the network entity for managing the content data of the most preferred service business is used for selecting the mobile edge nodes with the backup limited number from the preference degrees of the mobile edge nodes sending the backup requests after receiving the plurality of backup requests, and sending the content data of the service business to the selected mobile edge nodes.
Preferably, the system further comprises a server for determining the mobile edge node, configured to obtain a mobile edge node set of content data of the service to be placed in the mobile network; selecting at least one mobile edge node to be placed with the content data of the service from the mobile edge node set as a determined mobile edge node, sending an indication message for selecting the content data of the most preferred service, and indicating the determined mobile edge node to select the content data of the most preferred service;
and the mobile edge node is used for selecting the content data of the most preferable service after receiving the indication message.
As seen from the above, the mobile edge node in the embodiment of the present invention selects at least one piece of content data of a most preferred service from the preference degrees of the content data of the service services on the premise of meeting the current idle storage capacity of the mobile edge node, and then sends a backup request to a network entity that manages the content data of the most preferred service; after receiving multiple backup requests, the network entity managing the content data of the most preferred service selects the mobile edge nodes with backup limited number according to the preference degree of the mobile edge nodes sending the backup requests, and sends the content data of the service to the selected mobile edge nodes for storage. In this way, it is possible to determine to which mobile edge nodes the content data of each service should be placed based on the needs of each user for the content data of the service, thereby minimizing the amount of content data storage of the service and meeting the user needs. Therefore, the embodiment of the invention can reasonably place the content data of the service business which is most needed by the user in the mobile edge node.
Drawings
Fig. 1 is a flowchart of a method for placing different service services into a mobile edge node according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for placing different services into a mobile edge node according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second apparatus for placing different service services into a mobile edge node according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a system for placing different services into a mobile edge node according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
In order to reasonably place content data of a service which is most needed by a coverage user in a mobile edge node, when the content data of the service stored by a plurality of mobile edge nodes in a mobile network is planned, the method adopted by the embodiment of the invention comprises the following steps: the mobile edge node selects at least one most preferred service business content data according to the preference degree of the service business content data and on the premise of meeting the current idle storage capacity of the mobile edge node, and then sends a backup request to a network entity managing the most preferred service business content data; after receiving a plurality of backup requests, the network entity managing the content data of the most preferred service selects the mobile edge nodes with backup limited number according to the preference degree of the mobile edge nodes sending the backup requests, and sends the content data of the service to the selected mobile edge nodes for storage.
In this way, it is possible to determine which mobile edge nodes the content data of each service should be placed on based on the user's demand for the content data of the service, thereby minimizing the amount of content data storage of the service and satisfying the user's demand.
Fig. 1 is a flowchart of a method for placing different service services into a mobile edge node according to an embodiment of the present invention, which includes the following specific steps:
In the method, the backup limit number can be set according to needs.
In the method, which mobile edge nodes in the mobile network perform step 101 can be determined by the mobile edge nodes themselves, that is, when the mobile edge nodes determine that there is a capacity for placing content data of service traffic, step 101 is performed. Of course, it can also be determined uniformly by a server in the mobile network which mobile edge nodes in the mobile network perform step 101. In this case, the determining process of the mobile edge node is performed by a server in a mobile network, and includes:
acquiring a mobile edge node set of content data of a service to be placed in a mobile network;
and selecting at least one mobile edge node to be placed with the content data of the service from the mobile edge node set as the determined mobile edge node.
Here, the acquiring the set of mobile edge nodes to which the content data of the service traffic is to be placed in the mobile network includes:
determining whether the mobile edge node set is not empty, and if so, executing the subsequent steps; if not, providing the mobile edge node in the mobile network and the content data of the service preferred by the mobile edge node for reference use in subsequent placement.
In the method, step 101 specifically includes:
establishing a preference model matrix for the content data of the service business of the mobile edge node;
obtaining the preference degree of the mobile edge node for the content data of each service business by adopting a preference model matrix;
and selecting the content data of the service business meeting the current idle storage capacity of the mobile edge node from the content data of each service business according to the preference degree as the content data of the service business most preferred by the mobile edge node.
Here, the preference model matrix is established for the content data of the mobile edge node for the service
Where l represents the moving edge node ε n The l-th user that can provide the service,
is a moving edge node epsilon n Capable of serving a collection of all users, users
Content data for a service
Is modeled as p l,c ：
Wherein alpha is m,c Is influencing the user
Content data for a service
Parameter of preference, α m ＝∑ c α m,c ，q c Is content data for a certain service
The measure of preference:
where β is a correction factor.
In the method, said step 102 of selecting a backup limit number of mobile edge nodes from the mobile edge nodes according to the preference degree of the mobile edge nodes sending the backup requests includes:
establishing a preference model matrix of the mobile edge node sending the backup request aiming at the content data of the most preferred service business;
determining the preference degree of the content data of the most preferred service to each mobile edge node sending the backup request by adopting the preference model matrix;
and selecting the mobile edge nodes meeting the backup limit number from the determined mobile edge nodes according to the preference degree.
Herein, theFor the content data of the best service, establishing a preference model matrix of the mobile edge node sending the backup request as follows:
wherein the content of the first and second substances,
represents a matrix of dimensions C x N,
is a moving edge node epsilon n Can serve a set of all users, where l represents the mobile edge node ε n The ith user of the service that can be provided,
is the l-th user from the moving edge node epsilon n The obtained transmission delay of the content data of the service business comprises the following steps:
by V l,n Representing a slave mobile edge node
To the user
The length of the content data of the service is B c A byte.
The embodiments of the present invention will be described in detail with reference to a specific example.
1) Defining a transmission delay of content data of a service
Set up the needsThe number of sets of content data of the service traffic {1,2, …, C } to be placed into the mobile edge node, the set of content data of the service traffic being represented as
By V m,n Representing a slave mobile edge node
To the user
The transmission rate of (c). If the user cannot obtain the content data of the requested service from the mobile edge node adjacent to the user, the request is redirected to the central node, and the transmission rate is V m . Without loss of generality, V in this example m <V m,n . The service content data C e {1,2, …, C } has a length B c bits, the transmission delay of the content data of the service acquired by the user from the mobile edge node n is:
the transmission delay of the content data of the service acquired by the user from the central node is as follows:
2) preference modeling of content data of service traffic by mobile edge node
Whether the mobile edge node places the content data of a certain service is determined according to the collected user preference. Different users may have similar requirements for content data of the same service, because different under the control of the same mobile edge node are considered togetherUser preferences for content data of the same service traffic. This example will move an edge node ε n Content data to service traffic
Is modeled as h n,c ：
Where l represents the moving edge node ε n The l-th user that can provide the service,
is a moving edge node epsilon n A set of all users can be served. User
Content data for a service
Is modeled as p l,c ：
Wherein alpha is m,c Is influencing the user
Content data for a service
Parameter of preference, α m ＝∑ c α m,c 。q c Is content data to a certain service
The measure of preference:
wherein, beta is a correction coefficient, content data of a certain service can be easily found by observing the above formula
With smaller indices, there is a higher degree of preference. Wherein the content data of the service traffic
Is inversely proportional to the number of requests made.
3) Targeted optimal setting of mobile edge node preference modeling for content data of service traffic
The formula adopted is as follows:
(c)d n,c ∈{0,1}
wherein, d n,c 1 represents the moving edge node epsilon n Caching content data of service traffic
When d is n,c 0 means that the mobile edge node has no buffer. Constraint (a) defines that each moving edge node can cache at most ε c n The content data of the service business of the data volume, wherein epsilon is c of the content data of the service business to be cached by the mobile edge node n Coefficient of data amount can be set to0.8 to 0.9, without limitation. In view of the rights issue, the constraint (b) defines that the content data of a service is stored m at the maximum at all mobile edge nodes c The number of copies of the content data of different service services may be set differently, and is not limited herein.
Wherein s is c Size of content data representing each service, c n Indicating an upper limit of the amount of data for which each mobile edge node stores content data of service traffic.
4) Determination of a placement scheme for content data of a mobile edge node oriented most preferred service
Establishing a moving edge node epsilon n Content data to service traffic
Preference matrix of
Establishing content data of a service
For a certain mobile edge node epsilon n Preference matrix of
OverallMoving edge nodes ε n Can be put into ε c at most n Content data of a service traffic of a data volume; content data of service traffic
Storing m at most on all mobile edge nodes in a mobile network c And (4) portions are obtained. Thus, in this example by moving the edge node ε n According to its content data to service traffic
Determines to send a backup request for the content data of the most preferred service, and then for the content data of each service
Judging whether the number of the sent backup requests is more than m c If not, executing the embedding process to all backup requests, otherwise, serving the content data of the service according to the content data of the service
For a certain mobile edge node epsilon n The preference matrix selects the mobile edge node epsilon with the highest preference degree according with the number of backup requests n A placement process is performed.
The embodiment of the invention also provides a specific process of a specific example of a method for placing content data of different service businesses to a mobile edge node in a mobile network, and the specific steps comprise:
first step, establishing a mobile edge node set W with residual storage space 1 ＝{ε 1 ,ε 2 …,ε n }；
The second step, judge whether the edge node set of moving is an empty set, if deny, carry out the third step of the step; if yes, executing the seventh step;
in this step, when the edge nodes are collected
If so, executing the third step, otherwise, jumping to the sixth step;
represented is an empty set;
the third step, data initialization is carried out for each edge node, namely, a sum g of the data capacity of the placed content is initialized for each edge node n At the beginning
And content data for each service
Initialize m thereof c ；
The fourth step, for the edge node set W 1 In each of which is a moving edge node epsilon n According to content data of service traffic
Preference matrix of
If content data of the most preferred service
Size s of c Satisfies g n +s c ≤εc n Selecting content data to the most preferred service
Sending a backup request and aiming at the content data of the service business which sends the backup request
Set corresponding d n,c 1; otherwise, the mobile edge node deletes the service traffic from the preference matrixSelecting the content data of the second preferred service until the preference matrix of the mobile edge node is empty, and selecting the mobile edge node from the set W 1 Deleting the root of the Chinese character;
a fifth step of providing content data for each service
Judgment m c Whether or not greater than 0, and if not, skipping the content data
If so, compute the set
And for elements in the set, by preference
Sorting from big to small if the number of elements in the set | S c |>m c Before selection of m c Each mobile edge node receives the backup request and adds corresponding edge node g n ＝g n +s c And is provided with m c 0. For the rejected mobile edge node, d of the content data for the service traffic that has sent the backup request is set n,c 0, and advertises the mobile edge node to skip sending the backup request for the content data of the service next time (or advertises the mobile edge node sending the backup request for the content data of the service to delete the content data of the service in the preference matrix of the mobile edge node); otherwise if the number of elements in the set | S c |≤m c Selecting content data of service traffic
Receiving backup requests of all mobile edge nodes without modifying d n,c Adding corresponding edge nodes g n ＝g n +s c And is provided with m c ＝m c -|S c |；
Sixth itemStep of determining W 1 If the current time is not zero, executing a seventh step; if not, returning to the third step to continue execution;
and a seventh step of returning a matching result matrix D of the mobile edge node and the content data of the service, and ending the process.
The above procedure in a third step, for a moving edge node ε n Selecting content data towards the most preferred service
When a backup request is sent, one is selected. Of course, a plurality of them may be selected, and the number is not limited here. However, when selecting plural, it is guaranteed to move the edge node ε n The currently free data capacity can satisfy the content data of a plurality of the most preferred service businesses
The data capacity of (c).
Therefore, the embodiment of the invention simultaneously considers the content data of the service business and the user, provides the content data of the optimal service business which is placed based on the target of minimizing the transmission delay and the data storage quantity under the condition that the storage capacity of the mobile edge node is limited, and has significance for optimizing the content data of the service business in the field of mobile edge computing.
Fig. 2 is a schematic structural diagram of a device for placing different service services into a mobile edge node according to an embodiment of the present invention, where the device is a mobile edge node, and includes: a first preference determining unit and a first transceiving unit, wherein,
a first preference determining unit, configured to select, according to a preference degree for content data of a service, content data of at least one most preferred service from the content data of the service on the premise that a current idle storage capacity of a mobile edge node is satisfied;
a first transceiving unit for sending a backup request to a network entity managing content data of the preferred service; and receiving and storing the content data of the most preferred service business.
Fig. 3 is a schematic structural diagram of a second apparatus for placing different service services into a mobile edge node according to an embodiment of the present invention, where the apparatus is a network entity for managing content data of a service that is most preferred by the mobile edge node, and includes: a second preference determination unit and a second transceiver unit, wherein,
a second preference determining unit, configured to select a backup limited number of mobile edge nodes from the preference degrees for the mobile edge nodes that send the backup request;
a second transceiving unit, configured to send the content data of the service to the selected mobile edge node, so that the selected mobile edge node stores the content data of the service.
Fig. 4 is a schematic structural diagram of a system for placing different service services into a mobile edge node according to an embodiment of the present invention, where the system includes: a mobile edge node and a network entity managing content data of service services most preferred by the mobile edge node, wherein,
the mobile edge node is used for selecting at least one piece of content data of the most preferred service business from the preference degrees of the content data of the service businesses on the premise of meeting the current idle storage capacity of the mobile edge node, and then sending a backup request to a network entity for managing the content data of the most preferred service business; receiving and storing the content data of the most preferred service business;
and the network entity for managing the content data of the most preferred service business is used for selecting the mobile edge nodes with the backup limited number from the preference degrees of the mobile edge nodes sending the backup requests after receiving the plurality of backup requests, and sending the content data of the service business to the selected mobile edge nodes.
The system also comprises a server for determining the mobile edge node, which is used for acquiring a mobile edge node set of the content data of the service to be placed in the mobile network; selecting at least one mobile edge node to be placed with the content data of the service from the mobile edge node set as a determined mobile edge node, sending an indication message for selecting the content data of the most preferred service, and indicating the determined mobile edge node to select the content data of the most preferred service;
and the mobile edge node is used for selecting the content data of the most preferable service after receiving the indication message.
In this system, the network entity managing the content data of the preferred service traffic may be a virtual network entity, and may be formed by a plurality of cloud devices in a mobile network, which is not limited herein.
Thus, the embodiment of the present invention may set a server for determining the mobile edge node and a network entity for managing the content data of the preferred service on the network side of the mobile network, and consider the content data of the service and the user at the same time, and put the content data of the optimal service into the network based on the goal of minimizing the transmission delay and the data storage amount under the condition that the storage capacity of the accessed mobile edge node is limited.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A method for placing different services into a mobile edge node, the method comprising:
the mobile edge node selects at least one most preferred service business content data according to the preference degree of the service business content data and on the premise of meeting the current idle storage capacity of the mobile edge node, and then sends a backup request to a network entity managing the most preferred service business content data;
after receiving a plurality of backup requests, the network entity managing the content data of the most preferred service selects the mobile edge nodes with backup limited number according to the preference degree of the mobile edge nodes sending the backup requests, and sends the content data of the service to the selected mobile edge nodes for storage;
the mobile edge node selects at least one most preferred service content data from the preference degrees of the service content data according to the preference degrees of the service content data, and the selection comprises the following steps:
establishing a preference model matrix for the content data of the service business for the mobile edge node;
obtaining the preference degree of the mobile edge node for the content data of each service business by adopting a preference model matrix;
selecting the content data of the service business meeting the current idle storage capacity of the mobile edge node from the content data of each service business according to the preference degree as the content data of the service business most preferred by the mobile edge node;
establishing preference model matrix for the content data of the service of the mobile edge node as
Comprises the following steps:
Where l represents the moving edge node ε n The l-th user that can provide the service,
is a moving edge node epsilon n Set of all users that can be served, user
Content data for a service
Is modeled as p l，c ：
Wherein alpha is m，c Is influencing the user
Content data for a service
Parameter of preference, α m ＝∑ c α m，c ，q c Is content data for a certain service
The measure of preference:
wherein β is a correction factor;
the selecting the mobile edge nodes with the backup limit number according to the preference degree of the mobile edge nodes sending the backup requests comprises:
establishing a preference model matrix of the mobile edge node sending the backup request aiming at the content data of the most preferred service business;
determining the preference degree of the content data of the most preferred service business to each mobile edge node sending the backup request by adopting the preference model matrix;
selecting the mobile edge nodes meeting the backup limit number from the determined mobile edge nodes according to the preference degree;
the establishing a preference model matrix of the mobile edge node sending the backup request aiming at the content data of the best preferred service business is as follows:
wherein the content of the first and second substances,
represents a matrix of dimensions C x N,
is a moving edge node epsilon n Can serve a set of all users, where l represents the mobile edge node ε n The ith user of the service that can be provided,
is the l-th user from the moving edge node epsilon n The transmission delay of the acquired content data of the service business comprises the following steps:
V l，n representing a slave mobile edge node
To the user
The length of the content data of the service is B c A byte.
2. The method of claim 1, wherein the determining of the mobile edge node comprises:
acquiring a mobile edge node set of content data of a service to be placed in a mobile network;
and selecting at least one mobile edge node to be placed with the content data of the service from the mobile edge node set as the determined mobile edge node.
3. The method of claim 2, wherein the obtaining a set of mobile edge nodes to which content data of service traffic is to be placed in a mobile network comprises:
determining whether the mobile edge node set is not empty, and if so, executing the subsequent steps; if not, the mobile edge node in the mobile network and the content data of the service preferred by the mobile edge node are provided.
4. An apparatus for placing different services into a mobile edge node, the apparatus being a mobile edge node, comprising: a first preference determining unit and a first transceiver unit, wherein,
a first preference determining unit, configured to select, according to a preference degree of content data of a service, on the premise that a current idle storage capacity of a mobile edge node is satisfied, content data of at least one service that is most preferred from the preference degree;
a first transceiving unit for sending a backup request to a network entity managing content data of the preferred service; receiving and storing the content data of the most preferred service business;
the mobile edge node selects at least one most preferred service content data from the preference degrees of the service content data according to the preference degrees of the service content data, and the selection comprises the following steps:
establishing a preference model matrix for the content data of the service business of the mobile edge node;
obtaining the preference degree of the mobile edge node for the content data of each service business by adopting a preference model matrix;
selecting the content data of the service business meeting the current idle storage capacity of the mobile edge node from the content data of each service business according to the preference degree as the content data of the service business most preferred by the mobile edge node;
the preference model matrix is established for the content data of the service business by the mobile edge node
Comprises the following steps:
Where l represents the moving edge node ε n The l-th user that can provide the service,
is a moving edge node epsilon n Set of all users that can be served, user
For a serviceVolume data
Is modeled as p l，c ：
Wherein alpha is m，c Is influencing the user
Content data for a service
Parameter of preference, α m ＝∑ c α m，c ，q c Is content data for a certain service
The measure of preference:
where β is a correction factor.
5. An arrangement for placing different services in a mobile edge node, said arrangement being a network entity managing content data of services most preferred by the mobile edge node, comprising: a second preference determination unit and a second transceiver unit, wherein,
a second preference determining unit, configured to select a backup limited number of mobile edge nodes from the preference degrees of the mobile edge nodes that send the backup request;
a second transceiving unit, configured to send the content data of the service to the selected mobile edge node, so that the selected mobile edge node stores the content data of the service;
the selecting the mobile edge nodes with the backup limit number according to the preference degree of the mobile edge nodes sending the backup requests comprises:
establishing a preference model matrix of the mobile edge node sending the backup request aiming at the content data of the most preferred service business;
determining the preference degree of the content data of the most preferred service business to each mobile edge node sending the backup request by adopting the preference model matrix;
selecting the mobile edge nodes meeting the backup limit number from the determined mobile edge nodes according to the preference degree;
the establishing of the preference model matrix of the mobile edge node sending the backup request aiming at the content data of the best preferred service is as follows:
wherein the content of the first and second substances,
represents a matrix of dimensions C x N,
is a moving edge node epsilon n Can serve a set of all users, where l represents the mobile edge node ε n The l-th user that can provide the service,
is the l-th user from the moving edge node epsilon n The transmission delay of the acquired content data of the service business comprises the following steps:
V l，n representing a slave mobile edge node
To the user
The length of the content data of the service is B c A byte.
6. A system for placing different services in a mobile edge node, comprising a mobile edge node and a network entity managing content data of services most preferred by the mobile edge node, wherein,
the mobile edge node is used for selecting at least one piece of content data of the most preferred service business from the preference degrees of the content data of the service businesses on the premise of meeting the current idle storage capacity of the mobile edge node, and then sending a backup request to a network entity for managing the content data of the most preferred service business; receiving and storing the content data of the most preferred service business;
a network entity for managing the content data of the preferred service, which is used for selecting the mobile edge nodes with backup limited number according to the preference degree of the mobile edge nodes sending the backup requests after receiving a plurality of backup requests, and sending the content data of the service to the selected mobile edge nodes;
the mobile edge node selects at least one most preferred service content data from the preference degrees of the service content data according to the preference degrees of the service content data, and the selection comprises the following steps:
establishing a preference model matrix for the content data of the service business for the mobile edge node;
obtaining the preference degree of the mobile edge node for the content data of each service business by adopting a preference model matrix;
selecting the content data of the service business meeting the current idle storage capacity of the mobile edge node from the content data of each service business according to the preference degree as the content data of the service business most preferred by the mobile edge node;
establishing preference model matrix for the content data of the service of the mobile edge node as
Comprises the following steps:
Where l represents the moving edge node ε n The l-th user that can provide the service,
is a moving edge node epsilon n Set of all users that can be served, user
Content data for a service
Is modeled as p l，c ：
Wherein alpha is m，c Is influencing the user
Content data for a service
Parameter of preference, α m ＝∑ c α m，c ，q c Is content data for a certain service
The measure of preference:
wherein β is a correction factor;
the selecting the mobile edge nodes with the backup limit number according to the preference degree of the mobile edge nodes sending the backup requests comprises:
establishing a preference model matrix of the mobile edge node sending the backup request aiming at the content data of the most preferred service business;
determining the preference degree of the content data of the most preferred service business to each mobile edge node sending the backup request by adopting the preference model matrix;
selecting the mobile edge nodes meeting the backup limit number from the determined mobile edge nodes according to the preference degree;
the establishing a preference model matrix of the mobile edge node sending the backup request aiming at the content data of the best preferred service business is as follows:
wherein the content of the first and second substances,
represents a matrix of dimensions C x N,
is a moving edge node epsilon n Can serve a set of all users, where l represents the mobile edge node ε n The ith user of the service that can be provided,
is the l-th user from the moving edge node epsilon n The obtained transmission delay of the content data of the service business comprises the following steps:
V l，n representing a slave mobile edge node
To the user
The length of the content data of the service is B c A byte.
7. The system of claim 6, further comprising a server for determining a mobile edge node for obtaining a set of mobile edge nodes to which content data of a service traffic is to be placed in the mobile network; selecting at least one mobile edge node to be placed with the content data of the service from the mobile edge node set as a determined mobile edge node, sending an indication message for selecting the content data of the most preferred service, and indicating the determined mobile edge node to select the content data of the most preferred service;
and the mobile edge node is used for selecting the content data of the most preferable service after receiving the indication message.
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