CN113727366A - Electronic device, wireless communication method, and computer-readable storage medium - Google Patents

Electronic device, wireless communication method, and computer-readable storage medium Download PDF

Info

Publication number
CN113727366A
CN113727366A CN202010448165.0A CN202010448165A CN113727366A CN 113727366 A CN113727366 A CN 113727366A CN 202010448165 A CN202010448165 A CN 202010448165A CN 113727366 A CN113727366 A CN 113727366A
Authority
CN
China
Prior art keywords
content
version
stored
cache node
electronic device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010448165.0A
Other languages
Chinese (zh)
Inventor
陈巍
谢瞻远
孙晨
田中
王晓雪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to CN202010448165.0A priority Critical patent/CN113727366A/en
Priority to CN202180029482.1A priority patent/CN115461736A/en
Priority to PCT/CN2021/094231 priority patent/WO2021238713A1/en
Publication of CN113727366A publication Critical patent/CN113727366A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/10—File systems; File servers
    • G06F16/18—File system types
    • G06F16/182—Distributed file systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching

Abstract

The present disclosure relates to an electronic device, a wireless communication method, and a computer-readable storage medium. An electronic device according to the present disclosure includes processing circuitry configured to: gathering history request information for each of one or more user devices, the history request information including content requested by the user device and a requested version of the content; and determining one or more contents to be stored in the cache node and a stored version of each content according to the history request information. By using the electronic device, the wireless communication method and the computer readable storage medium according to the present disclosure, a reasonable cache policy can be set for the cache node, and a reasonable addressing policy can be set for the request content of the user, thereby improving the efficiency of the edge computing system.

Description

Electronic device, wireless communication method, and computer-readable storage medium
Technical Field
Embodiments of the present disclosure relate generally to the field of wireless communications, and in particular, to electronic devices, wireless communication methods, and computer-readable storage media. More particularly, the present disclosure relates to an electronic device used in a core network of a wireless communication system, an electronic device as a base station device in a wireless communication system, a wireless communication method performed by an electronic device in a core network of a wireless communication system, a wireless communication method performed by a base station device in a wireless communication system, and a computer-readable storage medium.
Background
Currently, low latency applications involving video, music, games, news, maps, autopilot, etc. are becoming more prevalent, greatly facilitating the growth of wireless communication services. However, current communication networks do not meet the requirements of low latency services well due to spectrum scarcity and peak power constraints.
In order to meet the communication demand of low-latency services, edge computing technology has been introduced in recent years. In the edge computing technology, a cache node with caching capacity can be arranged at a position closer to a user side, so that end-to-end time delay is reduced, network load is transferred to the edge of a network, and efficient service is realized.
However, in the edge computing technology, the caching capacity of the cache node is limited, and therefore how to effectively utilize the limited cache resources, that is, how to make a reasonable caching strategy to balance the limited cache resources and the huge data, is one of the technical problems that needs to be solved urgently. Further, the cached content may have different versions, for example, video files having multiple display formats, such as 480P, 720P, 1080P, etc. More content can be cached if a lower version of a file is cached, but it also means that a higher version of a file cannot be provided to the user. Therefore, a reasonable caching policy needs to be formulated to determine the version of the content cached in the caching node. Furthermore, when a user requests content, a suitable addressing scheme needs to be formulated to provide the user with the content and the corresponding version that he needs.
Therefore, a technical solution is needed to solve at least one of the above technical problems, so as to set a reasonable cache policy for a cache node and set a reasonable addressing policy for a request content of a user, thereby improving efficiency of an edge computing system.
Disclosure of Invention
This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
An object of the present disclosure is to provide an electronic device, a wireless communication method, and a computer-readable storage medium, which are configured to set a reasonable cache policy for a cache node and set a reasonable addressing policy for request content of a user, thereby improving efficiency of an edge computing system.
According to an aspect of the disclosure, there is provided an electronic device comprising processing circuitry configured to: gathering history request information for each of one or more user devices, the history request information including content requested by the user device and a requested version of the content; and determining one or more contents to be stored in the cache node and a stored version of each content according to the history request information.
According to another aspect of the present disclosure, there is provided an electronic device comprising processing circuitry configured to: receiving requested content and a requested version of the content from a user device; requesting content from a cache node in the case that the content and a stored version of the content stored by the cache node can satisfy the request of the user equipment; and receiving the content and the stored version of the content from the cache node, wherein the content and the stored version of the content stored by the cache node being able to satisfy the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version.
According to another aspect of the present disclosure, there is provided a wireless communication method performed by an electronic device, including: gathering history request information for each of one or more user devices, the history request information including content requested by the user device and a requested version of the content; and determining one or more contents to be stored in the cache node and a stored version of each content according to the history request information.
According to another aspect of the present disclosure, there is provided a wireless communication method performed by an electronic device, including: receiving requested content and a requested version of the content from a user device; requesting content from a cache node in the case that the content and a stored version of the content stored by the cache node can satisfy the request of the user equipment; and receiving the content and the stored version of the content from the cache node, wherein the content and the stored version of the content stored by the cache node being able to satisfy the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version.
According to another aspect of the present disclosure, there is provided a computer-readable storage medium comprising executable computer instructions that, when executed by a computer, cause the computer to perform a wireless communication method according to the present disclosure.
With the electronic device, the wireless communication method, and the computer-readable storage medium according to the present disclosure, the content and the stored version stored in the cache node may be determined according to the historical request information of the user equipment including the requested content and the requested version. Therefore, a reasonable caching strategy can be formulated, not only the content cached in the caching node can be determined, but also the version of the content cached in the caching node can be determined, and therefore more appropriate content and version can be stored by using limited storage resources. Because the content and the version of the cache node are reasonable, the possibility that the requested content and version can be provided for the user is increased, and the processing efficiency of the edge computing system is improved.
With the electronic device, the wireless communication method, and the computer-readable storage medium according to the present disclosure, when a user device requests content, the content and a corresponding version are provided by a cache node in a case where the content stored by the cache node can satisfy the request of the user device. Here, the content stored by the cache node to satisfy the request of the user equipment includes: the cache node stores the request content and either stores the same version as the requested version or stores a higher version than the requested version. Therefore, the addressing strategy is more reasonable, the cache node can provide service under the condition that the storage version is the same as the request version, and the cache node can provide service under the condition that the storage version is higher than the request version, so that the probability of providing service by the cache node is improved, and the processing efficiency of the edge computing system is improved.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure. In the drawings:
FIG. 1 is a schematic diagram illustrating an application scenario of the present disclosure;
fig. 2 is a diagram showing a structure of a wireless communication system to which an edge caching technique is applied;
fig. 3 is a block diagram illustrating an example of a configuration of an electronic device for a core network according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating history request information in a case where the request content is a video according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram showing history request information in a case where the request content is a game according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram showing history request information in a case where the request content is music according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating history request information in a case where the request content is a map according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram illustrating a cache state table in a case where the requested content is a video according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram illustrating a cache state table in the case where the requested content is a game according to an embodiment of the present disclosure;
fig. 10 is a schematic diagram showing a cache state table in a case where the requested content is music according to an embodiment of the present disclosure;
fig. 11 is a schematic diagram illustrating a cache state table in a case where the requested content is a map according to an embodiment of the present disclosure;
fig. 12 is a signaling flow diagram illustrating determination of a caching policy by an electronic device in a core network according to an embodiment of the disclosure;
fig. 13 is a block diagram illustrating an example of a configuration of an electronic device for a base station according to an embodiment of the present disclosure;
fig. 14 is a signaling flow diagram illustrating determination of a caching policy by an electronic device for a base station according to an embodiment of the present disclosure;
fig. 15 is a block diagram illustrating an example of a configuration of an electronic device for a base station according to an embodiment of the present disclosure;
fig. 16 is a signaling flow diagram illustrating the determination of an addressing policy by an electronic device for a base station in accordance with an embodiment of the present disclosure;
fig. 17 is a signaling flow diagram illustrating the determination of an addressing policy by an electronic device for a base station in accordance with an embodiment of the present disclosure;
fig. 18 is a signaling flow diagram illustrating the determination of an addressing policy by an electronic device for a base station in accordance with an embodiment of the disclosure;
fig. 19 is a signaling flow diagram illustrating the determination of an addressing policy by an electronic device for a base station in accordance with an embodiment of the disclosure;
fig. 20 is a signaling flow diagram illustrating the determination of an addressing policy by an electronic device for a base station in accordance with an embodiment of the disclosure;
fig. 21 is a schematic diagram showing the structure of a wireless communication system according to an embodiment of the present disclosure;
fig. 22 is a schematic diagram showing the structure of a wireless communication system according to an embodiment of the present disclosure;
fig. 23 is a flowchart illustrating a wireless communication method performed by an electronic device according to an embodiment of the present disclosure;
fig. 24 is a flowchart illustrating a wireless communication method performed by an electronic device according to another embodiment of the present disclosure;
FIG. 25 is a block diagram illustrating an example of a server 2500 in which an electronic device 300 according to the present disclosure may be implemented;
fig. 26 is a block diagram showing a first example of a schematic configuration of an eNB (Evolved Node B); and
fig. 27 is a block diagram showing a second example of the schematic configuration of an eNB.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure. It is noted that throughout the several views, corresponding reference numerals indicate corresponding parts.
Detailed Description
Examples of the present disclosure will now be described more fully with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.
Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms, and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known structures, and well-known technologies are not described in detail.
The description will be made in the following order:
1. a description of a scene;
2. a configuration example of an electronic device in a core network for determining a caching policy;
3. a configuration example of a base station for determining a caching policy;
4. configuration examples of base stations for determining addressing policies;
5. configuration examples of wireless communication systems;
6. a method embodiment;
7. application examples.
<1. description of the scene >
Fig. 1 is a schematic diagram illustrating an application scenario of the present disclosure. As shown in fig. 1, an application service provider may provide services such as short video, music, games, news, maps, images, etc. through a core network. The caching nodes may be arranged at the edge of the network, and the base station may access one or more caching nodes, into which some content may be cached. When the user needs to request the content, the user sends the request to the base station. In the case where the cache node accessible to the base station stores the content requested by the user, the base station may request the content from the cache node and forward the content to the user. Under the condition that the cache node which can be accessed by the base station does not store the content requested by the user, the base station can request the content from the application service provider through the core network and forward the content to the user.
Fig. 2 is a diagram showing the structure of a wireless communication system to which the edge caching technique is applied. As shown in fig. 2, a wireless communication system to which the edge caching technology is applied may include an application service provider, a core network, a base station, a caching node, and a user. Wherein, the application service provider may provide services through the core network, the base station may access one or more cache nodes, for example, be connected to one or more cache nodes in a wired or wireless manner, and the user requests content from the cache nodes or the application service provider through the base station.
In the wireless communication system applying the edge cache technology, because the cache node is closer to the base station and the user, the base station can obtain part of the requested content through the cache node without requesting the application service provider, so that the time delay of data can be reduced. However, as mentioned above, the caching capacity of the caching node is limited, and therefore, how to make a reasonable caching strategy to determine the content and the version of the cache is one of the technical problems to be solved urgently. Furthermore, when a user requests content, a suitable addressing scheme needs to be formulated to provide the user with the content and the corresponding version that he needs.
The present disclosure provides an electronic device in a wireless communication system, a wireless communication method executed by the electronic device in the wireless communication system, and a computer-readable storage medium for such a scenario, so as to set a reasonable cache policy for a cache node and set a reasonable addressing policy for a request content of a user, thereby improving efficiency of an edge computing system.
It is to be noted that, although fig. 1 and 2 show a typical structure of a wireless communication system to which an edge computing technique is applied, the structure of the wireless communication system according to the present disclosure is not limited thereto. According to the embodiment of the disclosure, the base station and the cache node may be provided as independent devices, for example, the base station and the cache node may be connected together and communicate in a wired or wireless manner. In addition, the base station and the cache node may also be integrated, i.e. the base station has the function of the cache node. Further, the base station may access only one cache node, which may set up different areas to store content from different application service providers for different application service providers. Optionally, the base station may also access a plurality of cache nodes, which may store content from different application service providers, respectively.
The wireless communication system according to the present disclosure applies an edge caching technique. Preferably, the wireless communication system according to the present disclosure may be a 5G NR (New Radio) communication system.
The network-side device according to the present disclosure may be, for example, an electronic device for a core network or an electronic device for a base station device.
An electronic device for a core network according to the present disclosure may be a server in the core network.
The base station device according to the present disclosure may be, for example, an eNB, or may be a gNB (base station in a 5 th generation communication system).
The user equipment according to the present disclosure may be a mobile terminal such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/cryptographic dog-type mobile router, and a digital camera device, or a vehicle-mounted terminal such as a car navigation apparatus. The user equipment may also be implemented as a terminal (also referred to as a Machine Type Communication (MTC) terminal) that performs machine-to-machine (M2M) communication. Further, the user equipment may be a wireless communication module (such as an integrated circuit module including a single chip) mounted on each of the above-described terminals.
<2. example of configuration of electronic device in core network for determining caching policy >
Fig. 3 is a block diagram illustrating an example of a configuration of an electronic device 300 according to an embodiment of the present disclosure. The electronic device 300 may be a network-side device in a wireless communication system, and specifically may be an electronic device used in a core network, and the electronic device 300 may be configured to determine respective contents stored in a cache node and a stored version of each content (also referred to as a cache policy in this disclosure).
As shown in FIG. 3, the electronic device 300 may include a gathering unit 310 and a determining unit 320.
Here, the respective units of the electronic device 300 may be included in the processing circuit. The electronic device 300 may include one processing circuit or may include a plurality of processing circuits. Further, the processing circuitry may include various discrete functional units to perform various different functions and/or operations. It should be noted that these functional units may be physical entities or logical entities, and that units called differently may be implemented by the same physical entity.
According to an embodiment of the present disclosure, the gathering unit 310 may gather historical request information of each of one or more user devices, which may include content requested by the user device and a requested version of the content.
According to an embodiment of the present disclosure, the determining unit 320 may determine one or more contents to be stored in the cache node and a stored version of each content according to the history request information.
As can be seen, according to the electronic device 300 of the embodiment of the present disclosure, the content and the stored version stored in the cache node may be determined according to the historical request information of the user equipment, which includes the request content and the request version. Therefore, a reasonable caching strategy can be formulated, not only the content cached in the caching node can be determined, but also the version of the content cached in the caching node can be determined, and therefore more appropriate content and version can be stored by using limited storage resources.
According to an embodiment of the present disclosure, as shown in fig. 3, the electronic device 300 may further include a communication unit 330 for receiving and transmitting information from and to other electronic devices.
According to an embodiment of the present disclosure, the gathering unit 310 may receive history request information from a serving base station of one or more user equipments through the communication unit 330.
According to an embodiment of the present disclosure, the serving base station may periodically transmit history request information of one or more user equipments served by the serving base station to the electronic device 300, so that the collecting unit 310 may periodically receive the history request information. Alternatively, the serving base station may also send history request information of one or more user equipments served by the serving base station to the electronic device 300 on an event basis. For example, in a case that contents requested by the user equipment served by the serving base station have a certain deviation, the serving base station may send history request information of one or more user equipments served by the serving base station to the electronic device 300 to request the electronic device 300 to re-determine the caching policy.
According to embodiments of the present disclosure, the content requested by the user device may be any form of content or file, including but not limited to video, music, games, news, maps, images. Furthermore, the content may be divided into different versions according to quality parameters of the content. The better the quality of the content, the higher the version of the content, and the worse the quality of the content, the lower the version of the content. Quality parameters include, but are not limited to, resolution, quality, accuracy. For example, where the content is a video, the video may be divided into different versions, including but not limited to 480P, 720P, 1080P; where the content is music, the music may be separated into different versions according to the quality of the music, including but not limited to standard quality (128kbps), high quality (192kbps), and ultra-high quality (320 kbps); when the content is a game, the game can be divided into different versions according to the image quality of the game, including but not limited to low image quality, medium image quality, high image quality and ultrahigh image quality; in the case where the content is news, the news may be divided into different versions according to the precision of the news, including but not limited to detailed stories, summary stories; in the case where the content is a map, the map may be divided into different versions according to the accuracy of the map, including but not limited to a base version and a high accuracy version; when the content is an image, the image may be divided into different versions according to the quality of the image, including but not limited to low quality, medium quality, high quality, and super high quality.
According to an embodiment of the present disclosure, the history request information collected by the collecting unit 310 may further include identification information (e.g., a number) of a serving base station that transmitted the history request information and/or identification information (e.g., a number) of a user equipment for which each piece of history request information is intended.
Fig. 4-7 illustrate, in an exemplary manner, examples of historical request information gathered by the gathering unit 310. Fig. 4 is a schematic diagram illustrating history request information in a case where the request content is a video according to an embodiment of the present disclosure. Fig. 5 is a schematic diagram showing history request information in a case where the request content is a game according to an embodiment of the present disclosure, fig. 6 is a schematic diagram showing history request information in a case where the request content is music according to an embodiment of the present disclosure, and fig. 7 is a schematic diagram showing history request information in a case where the request content is a map according to an embodiment of the present disclosure.
As shown in fig. 4, the history request information collected by the collecting unit 310 includes history request information of a user equipment numbered 1 transmitted by a base station numbered (r), and the user equipment numbered 1 has requested 480P video 1 and requested 1080P video 2 in a past period of time. The history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 2 transmitted by the base station numbered r, and the user equipment numbered 2 has requested 480P video 1 and also requested 4K video 3 in the past period of time. The history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 3 transmitted by the base station numbered @, and the user equipment numbered 3 has requested 720P of video 2 in a past period of time.
As shown in fig. 5, the history request information collected by the collection unit 310 includes history request information of the user equipment numbered 1 transmitted by the base station numbered r, and the user equipment numbered 1 requests the game 1 with the super high image quality and the game 2 with the super high image quality in a past period of time. The history request information collected by the collection unit 310 includes history request information of the user equipment numbered 2 transmitted from the base station numbered r, and the user equipment numbered 2 requests the game 1 with the super high image quality and also requests the game 3 with the super high image quality in a past period of time. The history request information collected by the collection unit 310 includes history request information of the user equipment numbered 3 transmitted from the base station numbered @, and the user equipment numbered 3 requests the game 2 with too low picture quality for a past period of time.
As shown in fig. 6, the history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 1 transmitted by the base station numbered r, and the user equipment numbered 1 has requested music 1 of 192kbps and requested music 2 of 320kbps in the past period of time. The history request information collected by the collection unit 310 includes history request information of the user equipment numbered 2 transmitted by the base station numbered (r), and the user equipment numbered 2 has requested music 1 of 320kbps and also requested music 3 of 192kbps for a past period of time. The history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 3 transmitted from the base station numbered @, and the user equipment numbered 3 has requested music 2 of 128kbps for a past period of time.
As shown in fig. 7, the history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 1 transmitted by the base station numbered r, and the user equipment numbered 1 has requested the basic version of map 1 and also requested the basic version of map 2 in a past period of time. The history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 2 transmitted by the base station numbered r, and the user equipment numbered 2 has requested the basic version of map 1 and also requested the high-precision version of map 3 in the past period of time. The history request information collected by the collecting unit 310 includes history request information of the user equipment numbered 3 transmitted by the base station numbered 2, and the user equipment numbered 3 requests the map 2 of the over-high precision version in a past period of time.
As above, examples of the history request information are described by taking the case where the content is a video, a game, music, and a map as an example, and the case where the content is other examples is also similar, and the details are not repeated in the present disclosure.
According to an embodiment of the present disclosure, the determining unit 320 may determine one or more contents to be stored in the cache node and a stored version of each content according to the history request information. Here, the determining unit 320 may determine the contents to be stored in the cache node accessible to the serving base station and the stored version of each content, respectively, according to the history request information from the respective serving base stations. For example, the determining unit 320 may determine the contents stored in the cache node accessible by the base station numbered r and the stored version of each content from the history request information from the base station numbered r, and so on.
The determination unit 320 is described in detail below by taking the history request information from one serving base station as an example.
According to an embodiment of the present disclosure, the determining unit 320 may utilize an optimization problem to determine one or more contents to be stored in a cache node and a stored version of each content.
According to the embodiment of the disclosure, the optimization target of the optimization problem includes that the probability that the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment is maximum. For example, the optimization objective may be represented by the following formula:
Figure BDA0002506703970000111
wherein x is the content to be determined and the storage version of each content stored in the cache node, and is a matrix, and the elements in the matrix are xjk，xjkA value of 1 indicates that the cache node stores the kth version, x, of the jth contentjkA value of 0 indicates that the cache node does not store the kth version of the jth content. That is, x is the caching policy finally determined by the determining unit 320.
According to an embodiment of the present disclosure, the determining unit 320 needs to solve the set x that maximizes the value of the formula following max. The formula behind max represents the probability that the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment. i denotes the number of the user equipment, which ranges from 1 to N, N being the total number of user equipment. j represents the number of contents, which ranges from 1-M, M being the total number of contents. k denotes the number of versions, which ranges from 1-Q, Q being the total number of versions of the content. p is a radical ofijkWhich represents the probability that the ith user requests the kth version of the jth content, which can be calculated from the historical request information received by the electronic device 300. For example, the probability that the ith user requests the kth version of the jth content may be a ratio between the number of times the ith user requests the kth version of the jth content in the history request information and the number of all requests in the history request information. That is, p can be calculated according to the following formulaijk。
Figure BDA0002506703970000112
Wherein n isijkIndicating the number of times that the ith user requests the kth version of the jth content in the history request information, NtotalIndicating the number of all requests in the historical request information.
According to an embodiment of the present disclosure, the determining unit 320 may further classify the user equipment according to the history request information, such that i in the above formula represents a number of a category of the user equipment. Here, the determining unit 320 may cause user equipments having similar history request information to be classified into the same class.
According to embodiments of the present disclosure, vector V may be usedmTo indicate the history request information, V, of the user equipment mmElement v in (1)myThe value of (a) indicates the number of versions the user equipment m requests for the y-th content in the history request information, and v is the number of versions the user equipment m requests for the y-th content if the user equipment m does not request the y-th content in the history request informationyThe value of (d) is 0. y ranges from 1-M, M being the total number of contents. For example, assuming M is 3, Vm＝[1，0，2]Indicating that the user device m requested version 1 of content 1 and version 2 of content 3, but did not request content 2. Further, the determining unit 320 may determine a difference between the historical request information of any two user equipments, and then classify the user equipments into different categories according to the difference between the historical request information of any two user equipments by using any one of clustering algorithms known in the art.
According to an embodiment of the present disclosure, the determining unit 320 may define a difference between the history request information of the user equipment m and the user equipment n according to the following formula:
Figure BDA0002506703970000121
wherein v ismyHistory request information V representing user equipment mmElement (ii) vnyRepresenting user equipment nHistory request information VnThe range of y is 1-M, M being the total number of contents.
As described above, the determination unit 320 may pre-process the history request information to classify the user equipment, thereby reducing the amount of calculation and increasing the calculation speed.
ujkIndicating whether the content stored by the cache node and the stored version of the content can meet the requirement that the user equipment requests the kth version of the jth content. In the case that the content stored in the cache node and the stored version of the content can meet the requirement that the user equipment requests the kth version of the jth content, ujkIs 1, and in case the content and the stored version of the content stored by the cache node cannot meet the requirement that the user equipment requests the kth version of the jth content, ujkIs 0.
According to the embodiment of the disclosure, the content stored by the cache node and the stored version of the content can meet the request of the user equipment, including: the cache node stores the content requested by the user device and the stored version of the content is the same as or higher than the requested version of the user device. That is, u can be expressed by the following formulajk：
Figure BDA0002506703970000122
Wherein x isjkEqual to 1 or 0, indicating whether the cache node stores the kth version of the jth content. Specifically, xjkA value of 1 indicates that the cache node stores the kth version, x, of the jth contentjkA value of 0 indicates that the cache node does not store the kth version of the jth content.
Figure BDA0002506703970000131
Indicating whether the kth version of the jth content can be converted from the lth version of the jth content.
Figure BDA0002506703970000132
Equal to 1 or 0, or a combination thereof,
Figure BDA0002506703970000133
when the number is 1, the k version of the j content can be obtained by converting the l version of the j content, and xjkA value of 0 indicates that the kth version of the jth content cannot be converted from the lth version of the jth content. According to the embodiment of the present disclosure, the content of the lower version can be converted from the content of the higher version. Therefore, in the case that the cache node stores the ith version of the jth content and l > k, the situation shows that the kth version of the jth content can be converted from the ith version of the jth content, and then
Figure BDA0002506703970000134
Is 1, otherwise
Figure BDA0002506703970000135
Is 0. l ranges from 1-Q, Q being the total number of versions of the content.
As described above, it is determined that the content and the stored version of the content stored by the cache node can satisfy the request of the user equipment not only in the case where the cache node stores the content requested by the user equipment and the stored version of the content is the same as the requested version of the user equipment, but also in the case where the cache node stores the content requested by the user equipment and the stored version of the content is higher than the requested version, the content and the stored version of the content stored by the cache node can satisfy the request of the user equipment. In this way, the probability of service being provided by the caching node may be increased.
According to an embodiment of the present disclosure, one or more contents to be stored in a cache node and a stored version of each content may be determined according to a storage capability of the cache node and a calculation capability of a serving base station. Specifically, the constraint condition of the optimization problem may be determined according to the storage capability of the cache node and the computing capability of the serving base station.
According to an embodiment of the present disclosure, the constraints of the optimization problem (also referred to as constraint 1 in the present disclosure) may include: the total size of the content and the stored version of the content stored by the cache node is not greater than the storage capacity of the cache node. For example, constraint 1 may be expressed by the following equation:
Figure BDA0002506703970000136
wherein x isjkEqual to 1 or 0, indicating whether the cache node stores the kth version of the jth content. Specifically, xjkA value of 1 indicates that the cache node stores the kth version, x, of the jth contentjkA value of 0 indicates that the cache node does not store the kth version of the jth content. c. CjkDenotes the size of the kth version of the jth content and C denotes the storage capacity of the cache node, i.e. the total size of the storage space of the cache node for the content provided by the current application service provider.
According to an embodiment of the present disclosure, in a case where there is only one cache node that the base station can access and the cache node stores only the content from the application service provider, C may represent a storage capacity of the cache node. In the case where there is only one cache node accessible to the base station and the cache node sets a different area to store content from a different application service provider, C may indicate the storage capacity of the area where the cache node stores content from the application service provider. In the case where there are a plurality of cache nodes connected to the base station and each cache node stores content from a different application service provider, C may represent the caching capability of the cache node for storing content from the application service provider.
According to the embodiment of the present disclosure, in a case where a plurality of cache nodes among the cache nodes accessible to the base station may store the content from the application service provider, C may represent a sum of storage capacities of the plurality of cache nodes. In this case, the determining unit 320 may determine the content and the storage version that should be stored by each cache node according to the caching capability of each cache node after calculating the content and the storage version that need to be stored by the plurality of cache nodes by using the optimization problem. Alternatively, C may also represent the storage capacity of one of the cache nodes, and the determining unit 320 may calculate the content and the storage version that needs to be stored by the one cache node by using an optimization problem, and then calculate the storage versions of the content that needs to be stored by other respective cache nodes in a similar manner.
In summary, the determining unit 320 may flexibly set C for representing the caching capability for the content provided by one application service provider, the currently calculated cache node, or the region of the cache node according to the layout of the cache node and the scheme of determining the caching policy when determining the optimization condition 1.
According to an embodiment of the present disclosure, the constraints of the optimization problem (also referred to as constraints 2 in the present disclosure) may further include: in the case of switching the contents stored by the cache node from a high stored version to a low requested version, the total amount of computation required is no more than the computing power of the serving base station. For example, constraint 2 may be expressed by the following equation:
Figure BDA0002506703970000141
wherein the content of the first and second substances,
Figure BDA0002506703970000142
indicating whether the kth version of the jth content can be converted from the lth version of the jth content. In the case where the cache node stores the ith version of the jth content, and l > k,
Figure BDA0002506703970000143
is 1, otherwise
Figure BDA0002506703970000144
Is 0.
Figure BDA0002506703970000145
Indicating the computing resources needed when the ith version of the jth content is converted from the ith version of the jth content to the kth version of the jth content. D represents the computing power of the base station, i.e. the maximum value of the computing resources that the base station is able to provide.
As described above, according to an embodiment of the present disclosure, the determination unit 320 may determine the value of x that maximizes the optimization target, i.e., determine the contents and versions of the respective contents stored in the cache nodes, according to the above-described optimization condition 1 and optimization condition 2, using the optimization problem.
Consider a specific example below. Assume that M is 2, i.e., the total number of contents is 2, N is 2, i.e., the total number of users is 2, Q is 3, i.e., the total number of versions is 3, pijkRepresenting the probability that the ith user requests the kth version of the jth content. The probability matrix of the 1 st user requesting each version of each content determined by the determining unit 320 is as follows:
Figure BDA0002506703970000151
wherein, P1Element p in (1)jkIndicating the probability that the 1 st user requests the kth version of the jth content. That is, p111＝0.06，p112＝0.09，p113＝0.15，p121＝0.14，p122＝0.21，p123＝0.35。
The probability matrix of the 2 nd user requesting each version of each content determined by the determining unit 320 is as follows:
Figure BDA0002506703970000152
wherein, P2Element p in (1)jkRepresenting the probability that the 2 nd user requests the kth version of the jth content. That is, p211＝0.24，p212＝0.3，p213＝0.06，p221＝0.16，p222＝0.2，p223＝0.04。
Here, for convenience of explanation, assuming that the cache node can only store two files, and assuming that the computing capability of the base station is limited, only version 3 of a file can be converted into version 2, or version 2 of the file can be converted into version 1, the probability that the content stored in the cache node and the stored version of the content can satisfy the request of the user equipment, which is calculated according to the optimization problem described in the foregoing for all caching policies, is shown in the following table.
TABLE 1
Figure BDA0002506703970000153
In table 1, the caching policy indicates the contents and version of the cache. For example, for cache policy (x)11,x12) Indicating that the 1 st version of the 1 st content and the 2 nd version of the 1 st content are cached. The probability represents a probability that the caching policy can satisfy the request of the user equipment. For example, cache policy (x)11,x12) The probability of being able to satisfy the request of the user equipment is 0.69. As shown in Table 1, the determining unit 320 may determine the cache policy (x) with the highest probability12,x23) I.e. caching the 2 nd version of the 1 st content and the 3 rd version of the 2 nd content.
As described above, in the case where the caching policy determined according to the optimization problem is adopted, the probability that the caching policy can satisfy the request of the user equipment is 1.19, and the probability that the caching policy can satisfy the request of the user equipment can be increased according to the embodiment of the present disclosure compared to the average probability of 0.96 in the case where the random caching policy is adopted.
As described above, according to the embodiment of the present disclosure, when the determining unit 320 determines the storage policy, not only the content to be stored by the cache node but also the version to be stored by the cache node are considered, so that the cache node can balance the caching capability and the probability of providing a service to the user equipment, thereby optimizing the processing efficiency of the wireless communication system to which the edge computing technology is applied.
According to an embodiment of the present disclosure, as shown in fig. 3, the electronic device 300 may further include an updating unit 340 for updating the content and the stored version stored in the cache node according to the one or more contents to be stored in the cache node and the stored version of each content.
According to an embodiment of the present disclosure, after the determining unit 320 determines the caching policy of one or more caching nodes, the updating unit 340 may trigger the electronic device 300 to request the content and the storage version in the caching policy from the application service provider and send the content and the storage version to be cached to the corresponding caching nodes.
As described above, according to the embodiments of the present disclosure, an active caching mode is adopted, that is, content is stored in advance to a caching node before the user equipment requests the content, so that the content can be provided directly by the caching node when the user equipment requests the content, thereby reducing the delay of data.
According to an embodiment of the present disclosure, after the determining unit 320 determines the caching policy of the one or more caching nodes, the updating unit 340 may further trigger the electronic device 300 to transmit the one or more contents to be stored in the caching nodes and the stored version of each content to the serving base station. In this way, the serving base station may update the cache state table of the cache node maintained by the serving base station according to the information from the electronic device 300, so that when the user equipment requests the content, it may determine whether the cache node may provide the service according to the cache state table of the cache node.
According to the embodiment of the disclosure, the base station may maintain the cache state table of each cache node which the base station can access. For example, the cache state table may include identification (number) information of the cache node, respective contents stored by the cache node, and a version of each of the contents. Optionally, the cache state table may further include location information of the cache node. In addition, in the case where the cache nodes have different regions, the cache state table may further include identification information of each region of the cache nodes.
Fig. 8-11 illustrate examples of cache status tables in an exemplary manner. Where fig. 8 is a schematic diagram showing a cache state table in a case where the request content is a video according to an embodiment of the present disclosure, fig. 9 is a schematic diagram showing a cache state table in a case where the request content is a game according to an embodiment of the present disclosure, fig. 10 is a schematic diagram showing a cache state table in a case where the request content is music according to an embodiment of the present disclosure, and fig. 11 is a schematic diagram showing a cache state table in a case where the request content is a map according to an embodiment of the present disclosure.
As shown in fig. 8, the position of the cache node numbered (r) is position 1, which stores 480P video 1 and 1080P video 2, and the position of the cache node numbered (r) is position 2, which stores 1080P video 1, 2K video 2, and 4K video 3.
As shown in fig. 9, the position of the cache node numbered (r) is position 1, which stores game 1 with low image quality and game 2 with high image quality, and the position of the cache node numbered (c) is position 2, which stores game 1 with high image quality, game 2 with super image quality and game 3 with high image quality.
As shown in fig. 10, the position of the cache node numbered (r) is position 1, which stores music 1 of 192kbps and music 2 of 320kbps, and the position of the cache node numbered (r) is position 2, which stores music 1 of 192kbps, music 2 of 192kbps and music 3 of 128 kbps.
As shown in fig. 11, the position of the cache node numbered (i) is position 1, the cache node stores map 1 of the high-precision version and map 2 of the basic version, and the position of the cache node numbered (ii) is position 2, and the cache node stores map 1 of the high-precision version, map 2 of the basic version and map 3 of the basic version.
As above, the examples of the cache state table are described by taking the examples that the content is a video, a game, music, and a map, and the cases that the content is other examples are also similar, and the details are not repeated in the present disclosure.
Fig. 12 is a signaling flow diagram illustrating determination of a caching policy by an electronic device in a core network according to an embodiment of the disclosure. Here, the electronic device 300 may be located in the core network in fig. 12. A user denotes any one of users served by a base station, and a cache node denotes a cache node that the base station can access. As shown in fig. 12, in step S1201, the user transmits request information including requested content and a requested version of the content to the base station. Next, in step S1202, the base station may collect request information of one or more users and generate history request information periodically or event-wise. Next, in step S1203, the base station transmits history request information to the core network. Next, in step S1204, the core network determines, according to the received history request information, a caching policy of the caching node that can be accessed by the base station, including each content cached and a stored version of each content. Next, in step S1205, the core network updates the content and the storage version stored in the cache node according to the determined cache policy. Next, in step S1206, the core network sends the caching policy to the base station. Next, in step S1207, the base station updates the buffer status table maintained by the base station according to the buffer policy from the core network.
As described above, according to the embodiment of the present disclosure, the electronic device 300 in the core network may determine the caching policy of the cache node according to the history request information, may determine not only the content cached in the cache node, but also the version of the content cached in the cache node, and thus may store more appropriate content and version using limited storage resources. Because the content and the version of the cache node are reasonable, the possibility that the requested content and version can be provided for the user is increased, and the processing efficiency of the edge computing system is improved.
<3. configuration example of base station for determining buffer policy >
Fig. 13 is a block diagram illustrating a structure of an electronic device 1300 in a wireless communication system according to an embodiment of the present disclosure. Here, the electronic device 1300 may be a network side device, and specifically may be a base station device, and the electronic device 1300 may be configured to determine a caching policy.
As shown in fig. 13, the electronic device 1300 may include a gathering unit 1310 and a determining unit 1320.
Here, the various units of the electronic device 1300 may be included in a processing circuit. It is noted that the electronic device 1300 may include one processing circuit or may include a plurality of processing circuits. Further, the processing circuitry may include various discrete functional units to perform various different functions and/or operations. It should be noted that these functional units may be physical entities or logical entities, and that units called differently may be implemented by the same physical entity.
According to an embodiment of the present disclosure, the gathering unit 1310 may gather historical request information of each of one or more user devices, which may include content requested by the user device and a requested version of the content.
According to an embodiment of the present disclosure, the determining unit 1320 may determine one or more contents to be stored in the cache node and a stored version of each content according to the history request information.
As can be seen, according to the electronic device 1300 of the embodiment of the present disclosure, the content and the stored version stored in the cache node may be determined according to the historical request information of the user equipment, which includes the requested content and the requested version. Therefore, a reasonable caching strategy can be formulated, not only the content cached in the caching node can be determined, but also the version of the content cached in the caching node can be determined, and therefore more appropriate content and version can be stored by using limited storage resources.
According to an embodiment of the present disclosure, as shown in fig. 13, the electronic device 1300 may further include a communication unit 1330 for receiving information from other devices and transmitting information to other devices.
According to an embodiment of the present disclosure, the gathering unit 1310 may receive history request information from each of one or more user devices through the communication unit 1330.
According to an embodiment of the present disclosure, the determining unit 1320 may employ the same configuration as the determining unit 320. That is, the determining unit 1320 may determine the caching policy of the caching node that the electronic device 1300 can access in the same manner as the determining unit 320, and details of the present disclosure are not repeated here. Only the configuration of the determination unit 1320 different from the determination unit 320 is described below.
According to an embodiment of the present disclosure, the determining unit 1320 may periodically determine the caching policy of the cache node. That is, the collecting unit 1310 may continuously collect history request information of each user device serviced by the electronic device 1300, and the determining unit 1320 may determine the caching policy of the caching node according to all history request information in the period. Optionally, the determining unit 1320 may also determine the caching policy of the caching node event-wise. For example, in a case where the electronic device 1300 determines that the content requested by the user equipment served by the electronic device has a certain deviation, the determining unit 1320 may determine the caching policy of the caching node according to all the historical request information collected within a predetermined time period.
According to an embodiment of the present disclosure, as shown in fig. 13, the electronic device 1300 may further include a generating unit 1340 configured to generate cache policy information, which may include one or more contents to be stored in the cache node and a stored version of each content. Further, the electronic device 1300 may transmit the cache policy information to the core network through the communication unit 1330 for the core network to update the content and the stored version stored in the cache node.
According to an embodiment of the present disclosure, as shown in fig. 13, the electronic device 1300 may further include a storage unit 1350 configured to store a cache state table of the cache node that the electronic device 1300 can access. For example, the cache state table may include identification (number) information of the cache node, respective contents stored by the cache node, and a version of each of the contents. Optionally, the cache state table may further include location information of the cache node. In addition, in the case where the cache nodes have different regions, the cache state table may further include identification information of each region of the cache nodes.
According to an embodiment of the present disclosure, after the determining unit 1320 determines the caching policy of the caching node, the storage unit 1350 may update the caching status table maintained by the storage unit 1350 according to the determined caching policy.
Fig. 14 is a signaling flow diagram illustrating determination of a caching policy by an electronic device for a base station in accordance with an embodiment of the disclosure. Here, the base station may be implemented by the electronic device 1300. A user represents any one of the users serviced by the electronic device 1300 and a cache node represents a cache node accessible by the electronic device 1300. As shown in fig. 14, in step S1401, the user transmits request information including requested content and a requested version of the content to the base station. Next, in step S1402, the base station may collect request information of one or more users. Next, in step S1403, the base station periodically or in an event determines a caching policy of a caching node connected to the base station according to the collected history request information, including each content cached and a stored version of each content. Next, in step S1404, the base station transmits the determined caching policy to the core network. Next, in step S1405, the core network updates the content and the storage version stored in the cache node according to the received cache policy. Next, in step S1406, the base station updates the buffer status table it maintains according to the determined buffer policy.
As described above, according to the embodiments of the present disclosure, the electronic device 1300 serving as a base station may determine a caching policy of a cache node according to history request information of user equipments served by the electronic device, may determine not only contents cached in the cache node but also versions of the contents cached in the cache node, and thus may store more appropriate contents and versions using limited storage resources. Because the content and the version of the cache node are reasonable, the possibility that the requested content and version can be provided for the user is increased, and the processing efficiency of the edge computing system is improved.
<4. configuration example of base station for determining addressing policy >
Fig. 15 is a block diagram illustrating a structure of an electronic device 1500 in a wireless communication system according to an embodiment of the present disclosure. The electronic device 1500 herein may be used as a network side device, in particular a base station device, and the electronic device 1500 may be used to determine where to obtain the content requested by the user equipment and to determine the version of the transmission (also referred to as an addressing policy in this disclosure).
As shown in fig. 15, the electronic device 1500 may include a communication unit 1510, a determination unit 1520, and a generation unit 1530.
Here, the respective units of the electronic device 1500 may be included in a processing circuit. The electronic device 1500 may include one processing circuit or may include a plurality of processing circuits. Further, the processing circuitry may include various discrete functional units to perform various different functions and/or operations. It should be noted that these functional units may be physical entities or logical entities, and that units called differently may be implemented by the same physical entity.
According to an embodiment of the present disclosure, the electronic device 1500 may receive request information including requested content and a requested version of the content from the user device through the communication unit 1510.
According to an embodiment of the present disclosure, the determining unit 1520 may determine whether the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment. Here, in the case where the cache node stores the requested content, and the stored version of the content is the same as the requested version or the stored version of the content is higher than the requested version, the determination unit 1520 may determine that the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment.
According to an embodiment of the present disclosure, in case that the determination unit 1520 determines that the content and the stored version of the content stored by the cache node can satisfy the request of the user equipment, the generation unit 1530 may generate request information to request the content to the cache node through the communication unit 1510.
According to an embodiment of the present disclosure, the electronic device 1500 may receive the content and the stored version of the content from the caching node through the communication unit 1510.
As described above, according to the electronic device 1500 of the embodiment of the present disclosure, in a case where the content stored by the cache node can satisfy the request of the user device, the content and the corresponding version are provided by the cache node. Here, the content stored by the cache node to satisfy the request of the user equipment includes: the cache node stores the request content and either stores the same version as the requested version or stores a higher version than the requested version. Therefore, the addressing strategy is more reasonable, the cache node can provide service under the condition that the storage version is the same as the request version, and the cache node can provide service under the condition that the storage version is higher than the request version, so that the probability of providing service by the cache node is improved, and the processing efficiency of the edge computing system is improved.
According to an embodiment of the present disclosure, the request information received by the electronic device 1500 from the user device may include the requested content and the requested version of the content. Optionally, the request information may also include identification information (e.g., a number) of the user equipment.
According to an embodiment of the present disclosure, the determining unit 1520 may determine whether the content and the stored version of the content stored in the one or more cache nodes accessible to the electronic device 1500 can satisfy the request of the user device. Further, in a case where there is at least one cache node capable of satisfying the request of the user equipment among the cache nodes accessible to the electronic device 1500, the determining unit 1520 may determine that the content and the stored version of the content stored by the cache node can satisfy the request of the user equipment.
According to an embodiment of the present disclosure, the determination unit 1520 may determine not only whether the content and the stored version of the content stored in the cache node can satisfy the request of the user equipment, but also a cache node providing the content to the user equipment. For example, in the case where only one cache node stores content and a stored version of the content that can satisfy the request of the user equipment, the determination unit 1520 may determine that the user equipment is provided with the requested content by the cache node. In a case where the content and the stored version of the content stored by the plurality of cache nodes can satisfy the request of the user equipment, the determining unit 1520 may select one cache node from the plurality of cache nodes and request the content from the selected cache node.
According to an embodiment of the present disclosure, the determining unit 1520 may select a cache node according to a channel quality between the electronic device 1500 and each cache node. For example, the determining unit 1520 may select a cache node with the best channel quality as the cache node providing the requested content, so as to increase the probability of success in transmitting the requested content.
According to an embodiment of the present disclosure, the determining unit 1520 may select a cache node according to a storage version of each cache node. For example, the determination unit 1520 may select a cache node according to a difference between a stored version and a requested version of each cache node. Preferably, the determining unit 1520 may select a cache node having the smallest difference between the stored version and the requested version, that is, a cache node having the closest stored version to the requested version. In this way, the amount of computation consumed by the electronic device 1500 or user device to convert the stored version to the requested version may be reduced.
According to an embodiment of the present disclosure, the determining unit 1520 may select a cache node according to both the channel quality between the electronic device 1500 and each cache node and the stored version of the respective cache node. For example, the determining unit 1520 may select a cache node according to a weighted sum of the channel quality and the difference between the stored version and the requested version. As another example, the determining unit 1520 may preferentially select the cache node according to the channel quality, and in case of the same channel quality, select the cache node according to the storage version. As another example, the determining unit 1520 may preferentially select the cache node according to the stored version, and in case that the stored versions are the same, select the cache node according to the channel quality.
The manner in which the determination unit 1520 selects the cache node is described above in an exemplary manner, but the present disclosure is not limited thereto. That is, according to an embodiment of the present disclosure, the determining unit 1520 may select a cache node according to a channel quality between the electronic device 1500 and each cache node and/or a stored version of the respective cache node.
According to an embodiment of the present disclosure, in case that the determining unit 1520 determines that the content stored by the cache node and the stored version of the content cannot satisfy the request of the user equipment, the generating unit 1530 may generate request information to request the content to the core network through the communication unit 1510. Further, the electronic device 1500 may receive the content and the stored version of the content from the core network through the communication unit 1510.
According to an embodiment of the present disclosure, in the case of a cache node in which all cache nodes accessible to the electronic device 1500 cannot satisfy the request of the user device, the determination unit 1520 may determine that the content stored by the cache node and the stored version of the content cannot satisfy the request of the user device.
According to an embodiment of the present disclosure, as shown in fig. 15, the electronic device 1500 may further include a version determination unit 1540 that may determine whether the stored version of the cache node or the stored version of the core network is the same as the requested version. Here, the content stored by the cache node can satisfy the request of the user equipment includes: the cache node stores the request content and the stored version is the same as the requested version or higher than the requested version, so the stored version obtained from the cache node may be the same as the requested version or higher than the requested version. In addition, the core network may transmit the same request content as the request version or may transmit the request content higher than the request version. Therefore, after the electronic device 1500 receives the requested content and the stored version of the requested content from the cache node or the core network, the version determination unit 1540 needs to determine whether the stored version is the same as the requested version.
According to an embodiment of the present disclosure, in a case where the electronic device 1500 acquires the requested content from the cache node and in a case where the version determination unit 1540 determines that the stored version of the cache node is the same as the requested version, the electronic device 1500 may directly transmit the content and the stored version of the cache node to the user equipment. Further, in a case where the electronic device 1500 acquires the requested content from the core network and in a case where the version determination unit 1540 determines that the stored version of the core network is the same as the requested version, the electronic device 1500 may directly transmit the content and the stored version of the core network to the user equipment.
According to the embodiment of the disclosure, in the case that the version determining unit 1540 determines that the storage version of the cache node is higher than the request version, there may be two processing manners: one is for the electronic device 1500 to convert the stored version to the requested version and then send the requested version to the user device, and the other is for the stored version to be sent to the user device, which determines whether to convert the stored version to the requested version. These two modes will be described separately below.
According to an embodiment of the present disclosure, as shown in fig. 15, the electronic device 1500 may further include a conversion unit 1550 configured to convert the storage version of the cache node or the storage version of the core network into the request version if the version determination unit 1540 determines that the storage version of the cache node or the storage version of the core network is higher than the request version. Further, the electronic device 1500 may transmit the request content and the converted request version to the user device through the communication unit 1510.
According to an embodiment of the disclosure, in the case that the version determining unit 1540 determines that the storage version of the cache node or the storage version of the core network is higher than the request version, the electronic device 1500 may also send the storage version of the cache node or the storage version of the core network to the user equipment through the communication unit 1510, so that the user equipment may decide whether to convert the storage version of the cache node or the storage version of the core network into the request version.
According to an embodiment of the present disclosure, as shown in fig. 15, the electronic device 1500 may further include a determining unit 1560, configured to determine which of the two manners is adopted when the version determining unit 1540 determines that the storage version of the cache node or the storage version of the core network is higher than the requested version.
According to an embodiment of the present disclosure, the electronic device 1500 may also obtain a channel quality between the electronic device 1500 and the user equipment. The determination unit 1560 may determine whether to convert the stored version into the requested version or directly transmit the stored version according to the channel quality between the electronic device 1500 and the user equipment. For example, in case the channel quality between the electronic device 1500 and the user equipment is good (e.g. the channel quality parameter is larger than a predetermined threshold), the determining unit 1560 may determine to directly send the stored version to the user equipment; in the case where the channel quality between the electronic device 1500 and the user equipment is poor (e.g., the channel quality parameter is not greater than a predetermined threshold), the determination unit 1560 may determine to convert the stored version to the requested version.
According to an embodiment of the present disclosure, the determination unit 1560 may determine whether to convert the stored version into the requested version or directly transmit the stored version according to the computing power of the electronic device 1500. For example, in the case where the computing resources of the electronic device 1500 are not occupied or the electronic device 1500 is provided with computing resources to convert the stored version into the requested version, the determination unit 1560 may determine to convert the stored version into the requested version; in the case where the computing resources of the electronic device 1500 are occupied and the electronic device 1500 does not have computing resources to convert the stored version to the requested version, the determination unit 1560 may determine to directly send the stored version to the user device.
According to embodiments of the present disclosure, the electronic device 1500 may also obtain computing capabilities of the user device. The determination unit 1560 may determine whether to convert the stored version into the requested version or directly transmit the stored version according to the computing power of the user equipment. For example, in a case where the user equipment does not have the calculation capability of converting the stored version into the requested version, the determination unit 1560 may determine to convert the stored version into the requested version; in the case where the user equipment has computing power to convert the stored version into the requested version, the determining unit 1560 may determine to send the stored version to the user equipment.
According to the embodiment of the present disclosure, the electronic device 1500 may further obtain a charging scheme of the user equipment. The determination unit 1560 may determine whether to convert the storage version into the requested version or directly transmit the storage version according to a charging scheme of the user equipment. For example, in case that the charging scheme of the user equipment indicates that the user equipment is not sensitive to traffic charging, the determining unit 1560 may determine to send the stored version to the user equipment; the determining unit 1560 may determine to convert the stored version to the requested version in case the charging scheme of the user equipment indicates that the user equipment is sensitive to traffic charging.
As described above, according to an embodiment of the present disclosure, the determination unit 1560 may determine whether to convert the stored version into the requested version or directly transmit the stored version according to one parameter of channel quality between the electronic device 1500 and the user equipment, computing power of the electronic device 1500, computing power of the user equipment, and a charging scheme of the user equipment. According to an embodiment of the present disclosure, the determination unit 1560 may also determine whether to convert the storage version into the requested version or directly transmit the storage version according to various parameters among the above-described parameters. One non-limiting way will be described below.
According to an embodiment of the present disclosure, the determination unit 1560 may determine to convert the stored version into the requested version in case the channel quality between the electronic device 1500 and the user equipment is poor. Specifically, in the case where the channel quality between the electronic device 1500 and the user equipment is poor and the computing resources of the electronic device 1500 are not occupied (i.e., the electronic device 1500 is provided with computing resources to convert the stored version into the requested version), the determination unit 1560 may determine to convert the stored version into the requested version. In the case where the channel quality between the electronic device 1500 and the user equipment is poor and the computing resources of the electronic device 1500 are occupied (i.e., the electronic device 1500 does not have the computing resources to convert the stored version to the requested version), the determination unit 1560 may determine to convert the stored version to the requested version again when the electronic device 1500 has the computing resources.
According to an embodiment of the present disclosure, in case that the channel quality between the electronic device 1500 and the user equipment is good, the determination unit 1560 may determine whether to convert the stored version into the requested version or directly transmit the stored version according to the charging scheme of the user equipment and the computing capability of the user equipment. In particular, the determining unit 1560 may determine to send the stored version directly to the user equipment in case the channel quality between the electronic device 1500 and the user equipment is good, the user equipment is not sensitive to traffic charges, and the user equipment has computing capabilities. The determining unit 1560 may determine to convert the stored version to the requested version in case the channel quality between the electronic device 1500 and the user equipment is good, the user equipment is sensitive to traffic charges or the user equipment has no computational capability.
As described above, the determination unit 1560 may determine whether to convert the stored version into the requested version or directly transmit the stored version according to one or more parameters of channel quality between the electronic device 1500 and the user equipment, computing power of the electronic device 1500, computing power of the user equipment, and a billing scheme of the user equipment. In addition, in the case where the user equipment receives a storage version different from the requested version, the user equipment may determine whether to convert the storage version into the requested version according to the actual situation.
Fig. 16-20 are signaling flow diagrams illustrating determining an addressing policy by an electronic device for a base station according to embodiments of the disclosure. In fig. 16-20, the base station may be implemented by the electronic device 1500.
As shown in fig. 16, in step S1601, the user transmits a request content and a request version of the content to the base station. Next, in step S1602, the base station determines whether there is a cache node that can satisfy the user' S request. It is assumed here that there is a cache node that can satisfy the user's request, and therefore the base station selects an appropriate cache node from one or more cache nodes that can satisfy the user's request. Next, in step S1603, the base station requests content, including the requested content of the user and the requested version of the content, from the caching node. Next, in step S1604, the cache node returns the request content and the stored version in the cache node to the base station. Next, in step S1605, the base station may determine whether to directly transmit the stored version or convert the stored version into the requested version according to any one of the manners described above. If the base station determines to directly transmit the stored version, the base station directly transmits the requested content and the stored version to the user in step S1606. If the base station determines to convert the stored version into the requested version, the base station converts the stored version into the requested version in step S1607, and transmits the requested content and the requested version to the user in step S1608. As described above, fig. 16 shows the addressing policy of the base station in the case where only one user equipment transmits request information and there is a cache node capable of satisfying the user's request. In particular, the base station may determine to retrieve the requested content from the caching node and may determine the version of the content to send to the user.
As shown in fig. 17, in step S1701, the user transmits a request content and a request version of the content to the base station. Next, in step S1702, the base station determines whether there is a cache node that can satisfy the user' S request. It is assumed here that there is no cache node that can satisfy the user's request. Next, in step S1703, the base station requests content, including the requested content of the user and the requested version of the content, from the core network. Next, in step S1704, the core network returns the request content and the stored version in the core network to the base station. Here, the core network may obtain the requested content and the corresponding version from the application service provider. Next, in step S1705, the base station may determine whether to directly transmit the stored version or convert the stored version into the requested version according to any one of the manners described above. If the base station determines to directly transmit the stored version, the base station directly transmits the request contents and the stored version to the user in step S1706. If the base station determines to convert the stored version into the requested version, the base station converts the stored version into the requested version in step S1707, and transmits the requested content and the requested version to the user in step S1708. As described above, fig. 17 shows the addressing policy of the base station in the case where only one user equipment transmits request information and there is no cache node capable of satisfying the user's request. Specifically, the base station may determine to obtain the requested content from the core network and may determine the version of the content sent to the user.
As shown in fig. 18, in step S1801, the user 1 transmits the requested content and the requested version of the content to the base station. Next, in step S1802, the base station determines whether there is a cache node that can satisfy the request of the user 1. It is assumed that there is a cache node capable of satisfying the request of the user 1, and therefore, the base station selects an appropriate cache node from one or more cache nodes capable of satisfying the request of the user 1, which is denoted as the cache node 1. Next, in step S1803, the base station requests the content, including the requested content of the user 1 and the requested version of the content, from the cache node 1. Next, in step S1804, the cache node 1 returns the request content of the user 1 and the stored version in the cache node to the base station. In step S1805, the user 2 transmits the requested content and the requested version of the content to the base station. Next, in step S1806, the base station determines whether there is a cache node that can satisfy the request of the user 2. It is assumed that there is a cache node capable of satisfying the request of the user 2, and therefore the base station selects an appropriate cache node from one or more cache nodes capable of satisfying the request of the user 2, which is denoted as the cache node 2. Next, in step S1807, the base station requests the content, including the requested content of the user 2 and the requested version of the content, from the cache node 2. Next, in step S1808, the cache node 2 returns the request content of the user 2 and the stored version in the cache node to the base station. In step S1809, the base station may determine whether to directly transmit the stored version or convert the stored version into the requested version for user 1 and user 2, respectively, according to any of the manners described above. In step S1810, the base station directly transmits the request content and the stored version to the user 1 according to the determination result for the user 1, or converts the stored version into the request version and transmits the request content and the request version to the user 1. In step S1811, the base station directly transmits the request content and the stored version to the user 2 according to the determination result for the user 2, or converts the stored version into the request version and transmits the request content and the request version to the user 2. As described above, fig. 18 shows the addressing policy of the base station in the case where there are a plurality of user equipments which transmit request information and there are cache nodes capable of satisfying the requests of the users for each user. Specifically, the base station may determine to obtain the requested content from the corresponding cache node, and may determine the version of the content transmitted to each user.
As shown in fig. 19, in step S1901, the user 1 transmits the requested content and the requested version of the content to the base station. In step S1902, the user 2 transmits the requested content and the requested version of the content to the base station. Next, in step S1903, the base station determines whether there is a cache node that can satisfy the request of the user 1 and whether there is a cache node that can satisfy the request of the user 2. It is assumed here that there is no cache node that can satisfy the request of the user 1 and there is no cache node that can satisfy the request of the user 2. Next, in step S1904, the base station requests content, including the requested content and the requested version of the content of user 1 and the requested content and the requested version of user 2, from the core network. Next, in step S1905, the core network returns the request content and the stored version in the core network of the user 1 and the request content and the stored version in the core network of the user 2 to the base station. In step S1906, the base station may determine whether to directly transmit the stored version or convert the stored version into the requested version for user 1 and user 2, respectively, according to any one of the manners described above. In step S1907, the base station directly transmits the request content and the stored version to the user 1 according to the determination result for the user 1, or converts the stored version into the request version and transmits the request content and the request version to the user 1. In step S1908, the base station directly transmits the request content and the stored version to the user 2 according to the determination result for the user 2, or converts the stored version into the request version and transmits the request content and the request version to the user 2. As described above, fig. 19 shows the addressing policy of the base station in the case where there are a plurality of user equipments which transmit request information and there is no cache node capable of satisfying the user's request for each user. Specifically, the base station may determine the content requested from the core network and may determine the version of the content sent to each user.
According to the embodiment of the present disclosure, in the case where the core network receives request information from a plurality of users and the contents requested by the plurality of users are the same, the core network may return only one requested content to the base station. According to the embodiment of the disclosure, in the case that the content requested by the plurality of users is the same and the requested versions are also the same, the core network may return only one requested content and the requested version of the content to the base station, and the base station sends the requested content and the requested version of the content to the plurality of users respectively. According to an embodiment of the present disclosure, in a case where the contents requested by the plurality of users are the same and the requested versions are different, the core network may return only one requested content and the highest version among the plurality of requested versions of the content to the base station. In this case, for a user whose request version is the same as the stored version returned by the core network, the base station may directly send the request content and the stored version to the user; for a user whose requested version is different from the stored version returned by the core network, the base station may determine whether to directly send the stored version to the user or to convert the stored version into the requested version and send the requested version to the user according to any of the manners described above. For example, user 1 requests content 1 and version 1, and user 2 requests content 1 and version 2, where version 1 is higher than version 2, the base station sends the request information of user 1 and user 2 to the core network in case the base station determines that there is no cache node satisfying the request of user 1 and there is no cache node satisfying the request of user 2. Next, the core network may return content 1 and version 1 to the base station, and then the base station transmits the content 1 and version 1 to the user 1, and may directly transmit the content 1 and version 1 to the user 2 or transmit the content 1 and version 2 to the user 2 after converting the version 1 into the version 2.
As shown in fig. 20, in step S2001, the user 1 transmits the request content and the requested version of the content to the base station. Next, in step S2002, the base station determines whether there is a cache node that can satisfy the request of the user 1. It is assumed that there is a cache node capable of satisfying the request of the user 1, and therefore, the base station selects an appropriate cache node from one or more cache nodes capable of satisfying the request of the user 1, which is denoted as the cache node 1. Next, in step S2003, the base station requests content, including the requested content of the user 1 and the requested version of the content, from the cache node 1. Next, in step S2004, the cache node 1 returns the request content of the user 1 and the stored version in the cache node to the base station. In step S2005, the user 2 transmits the requested content and the requested version of the content to the base station. Next, in step S2006, the base station determines whether there is a cache node that can satisfy the request of the user 2. It is assumed here that there is no cache node that can satisfy the request of user 2. Next, in step S2007, the base station requests content, including the requested content of the user 2 and the requested version of the content, from the core network. Next, in step S2008, the core network returns the request content of the user 2 and the stored version in the core network to the base station. In step S2009, the base station may determine whether to directly send the stored version or convert the stored version into the requested version for user 1 and user 2, respectively, according to any one of the manners described above. In step S2010, the base station directly transmits the request content and the stored version to the user 1 according to the determination result for the user 1, or converts the stored version into the request version and transmits the request content and the request version to the user 1. In step S2011, the base station directly transmits the request content and the stored version to the subscriber 2 according to the determination result for the subscriber 2, or converts the stored version into the request version and transmits the request content and the request version to the subscriber 2. As described above, fig. 20 shows the addressing policy of the base station in the case where there are a plurality of user equipments which transmit request information, there are cache nodes capable of satisfying the user's request for a part of users, and there are no cache nodes capable of satisfying the user's request for a part of users. Specifically, the base station may determine to acquire the requested content from the corresponding cache node or the core network, and may determine the version of the content transmitted to each user.
As described above, according to the electronic device 1500 of the present disclosure, in a case where the content stored by the cache node can satisfy the request of the user device, the content and the corresponding version are provided by the cache node, and in a case where the content stored by the cache node cannot satisfy the request of the user device, the content and the corresponding version are provided by the application service provider. Here, the content stored by the cache node to satisfy the request of the user equipment includes: the cache node stores the request content and either stores the same version as the requested version or stores a higher version than the requested version. Therefore, the addressing strategy is more reasonable, the cache node can provide service only under the condition that the storage version is the same as the request version, and the cache node can also provide service under the condition that the storage version is higher than the request version, so that the probability of providing service by the cache node is improved. In addition, under the condition that the storage version received from the cache node or the core network is higher than the request version, the electronic device 1500 may determine whether to convert the storage version into the request version or directly send the storage version to the user device according to various parameters of the electronic device 1500 and the user device, so that computing resources of the electronic device 1500 and the user device may be fully utilized, and satisfactory services may be provided for the user device as much as possible.
Note that, for convenience of description, the electronic device 1300 capable of determining the caching policy and the electronic device 1500 capable of determining the addressing policy are separately described in the present disclosure, and both the electronic device 1300 and the electronic device 1500 may be used for the base station device in practice. That is, in the case where the base station device can determine both the buffering policy and the addressing policy, the base station device may include all units in the electronic device 1300 and all units in the electronic device 1500 and can perform corresponding functions.
<5. configuration example of Wireless communication System >
A wireless communication system according to the present disclosure may include a core network, a base station, at least one caching node accessible by the base station, and at least one user served by the base station. Optionally, the wireless communication system may further comprise an application service provider. The application service provider provides one or more contents in the application service to the base station through the core network, the cache node stores the one or more contents provided by the application service provider, and the user obtains the requested contents from the cache node or the core network through the base station.
According to an embodiment of the present disclosure, a base station may receive history request information from each of one or more user equipments served thereby and transmit the history request information of each user equipment to a core network. The history request information includes content requested by the user equipment and a requested version of the content. According to an embodiment of the present disclosure, the core network may determine one or more contents to be stored in the cache node and a stored version of each content according to history request information of each user equipment from the base station.
According to an embodiment of the present disclosure, a base station may receive requested content and a requested version of the content from a user equipment; requesting the content from the cache node under the condition that the content and the stored version of the content stored by the cache node can meet the request of the user equipment; and receiving the content and the stored version of the content from the cache node, wherein the content and the stored version of the content stored by the cache node being capable of satisfying the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version. According to an embodiment of the present disclosure, a cache node may receive request information from a base station, the request information including request content and a request version of a user equipment, and transmit the request content and a stored version stored in the cache node to the base station.
Fig. 21 is a schematic diagram showing the structure of a wireless communication system according to an embodiment of the present disclosure. As shown in fig. 21, a wireless communication system may include an application service provider, a core network, a base station, a caching node accessible by the base station, and a user. For ease of illustration, fig. 21 shows only one base station, one user, and one cache node. The base station may gather historical request information for the user and may determine an enforcement policy and the core network may determine a caching policy. That is, according to embodiments of the present disclosure, the caching policy may be determined by the core network and the addressing policy may be determined by the base station.
According to an embodiment of the present disclosure, a base station may receive history request information including contents requested by a user equipment and a requested version of the contents from each of one or more user equipments served thereby, and may determine one or more contents to be stored in a cache node and a stored version of each of the contents from the history request information of each of the user equipments.
According to an embodiment of the present disclosure, a base station may receive requested content and a requested version of the content from a user equipment; requesting the content from the cache node under the condition that the content and the stored version of the content stored by the cache node can meet the request of the user equipment; and receiving the content and the stored version of the content from the cache node, wherein the content and the stored version of the content stored by the cache node being capable of satisfying the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version. According to an embodiment of the present disclosure, a cache node may receive request information from a base station, the request information including request content and a request version of a user equipment, and transmit the request content and a stored version stored in the cache node to the base station.
Fig. 22 is a schematic diagram showing the structure of a wireless communication system according to an embodiment of the present disclosure. As shown in fig. 22, a wireless communication system may include an application service provider, a core network, a base station, a caching node accessible by the base station, and a user. For ease of illustration, fig. 22 shows only one base station, one user, and one cache node. The base station may gather historical request information for the user, may determine a caching policy, and may determine a enforcement policy. That is, according to embodiments of the present disclosure, the buffering policy may be determined by the base station, and the addressing policy may be determined by the base station.
In the structure shown in fig. 21, the electronic device 300 described in the foregoing may be used in a core network, and a base station may have the functions of the electronic device 1500 described in the foregoing, so that the embodiments of the electronic device 300 and the electronic device 1500 in the foregoing are applicable to this. In the configuration shown in fig. 22, the base station may have the functions of the electronic apparatus 1300 and the electronic apparatus 1500 described above, and thus the embodiments of the electronic apparatus 1300 and the electronic apparatus 1500 described above are applicable to this.
<6. method example >
Next, a wireless communication method performed by a network-side device (the electronic device 300 or the electronic device 1300) in a wireless communication system according to an embodiment of the present disclosure will be described in detail. In particular, a wireless communication method of determining a caching policy according to an embodiment of the present disclosure will be described in detail.
Fig. 23 is a flowchart illustrating a wireless communication method performed by the electronic device 300 or the electronic device 1300 in the wireless communication system according to an embodiment of the present disclosure.
As shown in fig. 23, in step S2310, history request information of each of one or more user devices is collected, the history request information including content requested by the user device and a requested version of the content.
Next, in step S2320, one or more contents to be stored in the cache node and a stored version of each content are determined according to the history request information.
Preferably, determining one or more contents to be stored in the cache node and a stored version of each content comprises: the one or more content to be stored in the cache node and the stored version of each content are also determined according to the storage capabilities of the cache node and the computing capabilities of the serving base station of the one or more user equipments.
Preferably, determining one or more contents to be stored in the cache node and a stored version of each content comprises: determining one or more contents and a stored version of each content to be stored in the cache node using an optimization problem, wherein an optimization objective of the optimization problem comprises a maximum probability that the contents and the stored versions of the contents stored by the cache node can satisfy a request of the user equipment.
Preferably, the content and the stored version of the content stored by the cache node are capable of satisfying the request of the user equipment, and the method comprises the following steps: the cache node stores the content requested by the user device and the stored version of the content is the same as or higher than the requested version of the user device.
Preferably, the constraints of the optimization problem include: the total size of the content and the storage version of the content stored by the cache node is not greater than the storage capacity of the cache node; and in the case of switching the content stored by the cache node from a high stored version to a low requested version, the total amount of computation required is no more than the computing power of the serving base station of the one or more user equipments.
Preferably, the electronic device is located in a core network, and wherein gathering the historical request information for each user device comprises: history request information is received from a serving base station of one or more user equipment.
Preferably, the wireless communication method further includes: updating the contents and the stored version stored in the cache node according to the one or more contents to be stored in the cache node and the stored version of each content; and transmitting the one or more contents to be stored in the cache node and the stored version of each content to the serving base station.
Preferably, the electronic device is located in a serving base station of the one or more user devices, and wherein gathering the historical request information for each user device comprises: receiving the history request information from each of the one or more user devices.
Preferably, the wireless communication method further includes: the one or more contents and the stored version of each content to be stored in the cache node are sent to the core network for the core network to update the contents and the stored version stored in the cache node.
As described above, the wireless communication method of determining the caching policy according to the embodiment of the present disclosure is described, and the execution subject of the wireless communication method may be the electronic device 300 or the electronic device 1300 according to the embodiment of the present disclosure, so all the embodiments described above with respect to the electronic device 300 and the electronic device 1300 are applicable thereto.
A wireless communication method performed by the electronic device 1500 in the wireless communication system according to an embodiment of the present disclosure will be described in detail next. In particular, a wireless communication method of determining an addressing policy according to an embodiment of the present disclosure will be described in detail.
Fig. 24 is a flowchart illustrating a wireless communication method performed by an electronic device 1500 in a wireless communication system according to an embodiment of the present disclosure.
As shown in fig. 24, in step S2410, requested content and a requested version of the content are received from a user equipment.
Next, in step S2420, in a case where the content and the stored version of the content stored by the cache node can satisfy the request of the user equipment, the content is requested from the cache node. Here, the content and the stored version of the content stored by the cache node being capable of satisfying the request of the user equipment includes: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version.
Next, in step S2430, the content and the stored version of the content are received from the caching node.
Preferably, the wireless communication method further includes: requesting the content from the core network under the condition that the content stored by the cache node and the stored version of the content cannot meet the request of the user equipment; and receiving the content and the stored version of the content from the core network.
Preferably, the wireless communication method further includes: and under the condition that the storage version of the cache node or the storage version of the core network is the same as the request version, transmitting the content, the storage version of the cache node or the storage version of the core network to the user equipment.
Preferably, the wireless communication method further includes: converting the storage version of the cache node or the storage version of the core network into a request version under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version; and sending the content and the converted request version to the user equipment.
Preferably, the wireless communication method further includes: and under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version, sending the storage version of the cache node or the storage version of the core network to the user equipment so that the user equipment can decide whether to convert the storage version of the cache node or the storage version of the core network into the request version.
Preferably, the wireless communication method further includes: acquiring a charging scheme of user equipment and channel quality between electronic equipment and the user equipment; and under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version, determining whether to convert the storage version of the cache node or the storage version of the core network into the request version according to a charging scheme of the user equipment and/or the channel quality between the electronic equipment and the user equipment.
Preferably, the wireless communication method further includes: under the condition that the content and the stored version of the content stored by the plurality of cache nodes can meet the request of the user equipment, selecting the cache nodes according to the channel quality between the electronic equipment and each cache node and/or the stored version of each cache node; and requesting content from the selected cache node.
As described above, the wireless communication method of determining the addressing policy according to the embodiment of the present disclosure is described, and the execution subject of the wireless communication method may be the electronic device 1500 according to the embodiment of the present disclosure, so that all the embodiments described above with respect to the electronic device 1500 are applicable thereto.
<7. application example >
The techniques of this disclosure can be applied to a variety of products. For example, the electronic device 300 and the electronic device 1300 may be implemented as network-side devices. Specifically, the electronic device 300 may be located in a core network, and the electronic device 1300 may be used for a base station device.
For example, the electronic device 300 may be implemented as any type of server, such as a tower server, a rack server, and a blade server. The electronic device 300 may be a control module mounted on a server, such as an integrated circuit module comprising a single die, and a card or blade (blade) inserted into a slot of a blade server.
The base station apparatus may be implemented as a macro eNB and a small eNB, and may also be implemented as any type of gNB (base station in a 5G system). The small eNB may be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. Alternatively, the base station may be implemented as any other type of base station, such as a NodeB and a Base Transceiver Station (BTS). The base station may include: a main body (also referred to as a base station apparatus) configured to control wireless communication; and one or more Remote Radio Heads (RRHs) disposed at a different place from the main body.
The user equipment may be implemented as a mobile terminal such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/cryptographic dog-type mobile router, and a digital camera, or a vehicle-mounted terminal such as a car navigation apparatus. The user equipment may also be implemented as a terminal (also referred to as a Machine Type Communication (MTC) terminal) that performs machine-to-machine (M2M) communication. Further, the user equipment may be a wireless communication module (such as an integrated circuit module including a single die) mounted on each of the user equipments described above.
< application example with respect to Server >
Fig. 25 is a block diagram illustrating an example of a server 2500 in which an electronic device 300 according to the present disclosure may be implemented. The server 2500 includes a processor 2501, memory 2502, storage 2503, network interface 2504, and bus 2506.
The processor 2501 may be, for example, a Central Processing Unit (CPU) or a Digital Signal Processor (DSP), and controls the functions of the server 2500. The memory 2502 includes a Random Access Memory (RAM) and a Read Only Memory (ROM), and stores data and programs executed by the processor 2501. The storage 2503 may include a storage medium such as a semiconductor memory and a hard disk.
The network interface 2504 is a wired communication interface for connecting the server 2500 to a wired communication network 2505. The wired communication network 2505 may be a core network such as an Evolved Packet Core (EPC) or a Packet Data Network (PDN) such as the internet.
The bus 2506 connects the processor 2501, the memory 2502, the storage 2503, and the network interface 2504 to each other. The bus 2506 may include two or more buses (such as a high-speed bus and a low-speed bus) each having a different speed.
In the server 2500 shown in fig. 25, the collecting unit 310, the determining unit 320, and the updating unit 340 described by using fig. 3 may be implemented by the processor 2501, and the communication unit 330 described by using fig. 3 may be implemented by the network interface 2504. For example, the processor 2501 may perform the functions of gathering historical request information, determining caching policies, and updating cache contents and versions in cache nodes by executing instructions stored in the memory 2502 or the storage 2503.
< application example with respect to base station >
(first application example)
Fig. 26 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied. eNB 2600 includes one or more antennas 2610 and base station equipment 2620. The base station device 2620 and each antenna 2610 may be connected to each other via an RF cable.
Each of the antennas 2610 includes a single or multiple antenna elements (such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna), and is used for the base station device 2620 to transmit and receive wireless signals. As shown in fig. 26, eNB 2600 may include multiple antennas 2610. For example, the multiple antennas 2610 may be compatible with multiple frequency bands used by eNB 2600. Although fig. 26 shows an example in which eNB 2600 includes multiple antennas 2610, eNB 2600 may also include a single antenna 2610.
Base station device 2620 includes a controller 2621, a memory 2622, a network interface 2623, and a wireless communication interface 2625.
The controller 2621 may be, for example, a CPU or a DSP, and operates various functions of higher layers of the base station device 2620. For example, the controller 2621 generates data packets from data in a signal processed by the wireless communication interface 2625 and transfers the generated packets via the network interface 2623. The controller 2621 may bundle data from the plurality of baseband processors to generate a bundle packet, and transfer the generated bundle packet. The controller 2621 may have a logic function to perform the following control: such as radio resource control, radio bearer control, mobility management, admission control and scheduling. The control may be performed in connection with a nearby eNB or core network node. The memory 2622 includes a RAM and a ROM, and stores programs executed by the controller 2621 and various types of control data (such as a terminal list, transmission power data, and scheduling data).
The network interface 2623 is a communication interface for connecting the base station device 2620 to a core network 2624. The controller 2621 may communicate with a core network node or another eNB via a network interface 2623. In this case, the eNB 2600 and a core network node or other eNB may be connected to each other through a logical interface, such as an S1 interface and an X2 interface. Network interface 2623 may also be a wired communication interface or a wireless communication interface for a wireless backhaul. If network interface 2623 is a wireless communication interface, then network interface 2623 may use a higher frequency band for wireless communications than the frequency band used by wireless communication interface 2625.
Wireless communication interface 2625 supports any cellular communication schemes such as Long Term Evolution (LTE) and LTE-advanced and provides wireless connectivity to terminals located in the cell of eNB 2600 via antenna 2610. Wireless communication interface 2625 may generally include, for example, a baseband (BB) processor 2626 and RF circuitry 2627. BB processor 2626 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing of layers such as L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). In place of the controller 2621, the BB processor 2626 may have a part or all of the logic functions described above. BB processor 2626 may be a memory that stores a communication control program, or a module that includes a processor and related circuitry configured to execute a program. The update program may cause the function of BB processor 2626 to change. The module may be a card or blade that is inserted into a slot of base station device 2620. Alternatively, the module may be a chip mounted on a card or blade. Meanwhile, the RF circuit 2627 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive a wireless signal via the antenna 2610.
As shown in fig. 26, wireless communication interface 2625 may include a plurality of BB processors 2626. For example, the plurality of BB processors 2626 may be compatible with a plurality of frequency bands used by eNB 2600. As shown in fig. 26, wireless communication interface 2625 may include a plurality of RF circuits 2627. For example, the plurality of RF circuits 2627 may be compatible with a plurality of antenna elements. Although fig. 26 shows an example in which wireless communication interface 2625 includes multiple BB processors 2626 and multiple RF circuits 2627, wireless communication interface 2625 may also include a single BB processor 2626 or a single RF circuit 2627.
(second application example)
Fig. 27 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied. eNB 2730 includes one or more antennas 2740, base station equipment 2750, and RRHs 2760. The RRH 2760 and each antenna 2740 may be connected to each other via an RF cable. The base station device 2750 and RRH 2760 may be connected to each other via a high-speed line such as a fiber optic cable.
Each of the antennas 2740 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 2760 to transmit and receive wireless signals. As shown in fig. 27, eNB 2730 may include multiple antennas 2740. For example, the multiple antennas 2740 may be compatible with multiple frequency bands used by eNB 2730. Although fig. 27 shows an example in which eNB 2730 includes multiple antennas 2740, eNB 2730 may also include a single antenna 2740.
Base station device 2750 includes a controller 2751, a memory 2752, a network interface 2753, a wireless communication interface 2755, and a connection interface 2757. The controller 2751, the memory 2752, and the network interface 2753 are the same as the controller 2621, the memory 2622, and the network interface 2623 described with reference to fig. 26. Network interface 2753 is a communication interface for connecting base station device 2750 to core network 2754.
The wireless communication interface 2755 supports any cellular communication scheme (such as LTE and LTE-advanced) and provides wireless communication via RRHs 2760 and antennas 2740 to terminals located in a sector corresponding to the RRHs 2760. The wireless communication interface 2755 may generally include, for example, a BB processor 2756. BB processor 2756 is the same as BB processor 2626 described with reference to fig. 26, except that BB processor 2756 is connected to RF circuitry 2764 of RRH 2760 via connection interface 2757. As shown in fig. 27, wireless communication interface 2755 may include a plurality of BB processors 2756. For example, the plurality of BB processors 2756 may be compatible with the plurality of frequency bands used by eNB 2730. Although fig. 27 shows an example in which wireless communication interface 2755 includes multiple BB processors 2756, wireless communication interface 2755 may also include a single BB processor 2756.
The connection interface 2757 is an interface for connecting the base station apparatus 2750 (wireless communication interface 2755) to the RRH 2760. The connection interface 2757 may also be a communication module for communication in the above-described high-speed line connecting the base station apparatus 2750 (wireless communication interface 2755) to the RRH 2760.
RRH 2760 includes connection interface 2761 and wireless communication interface 2763.
The connection interface 2761 is an interface for connecting the RRH 2760 (wireless communication interface 2763) to the base station apparatus 2750. The connection interface 2761 may also be a communication module for communication in the above-described high-speed line.
The wireless communication interface 2763 transmits and receives wireless signals via the antenna 2740. Wireless communication interface 2763 may generally include, for example, RF circuitry 2764. The RF circuitry 2764 may include, for example, mixers, filters, and amplifiers, and transmits and receives wireless signals via the antenna 2740. As shown in fig. 27, wireless communication interface 2763 may include a plurality of RF circuits 2764. For example, multiple RF circuits 2764 may support multiple antenna elements. Although fig. 27 illustrates an example in which wireless communication interface 2763 includes multiple RF circuits 2764, wireless communication interface 2763 may also include a single RF circuit 2764.
In the eNB 2600 and the eNB 2730 shown in fig. 26 and 27, the collection unit 1310, the determination unit 1320, and the generation unit 1340 described by using fig. 13, and the determination unit 1520, the generation unit 1530, the version determination unit 1540, the conversion unit 1550, and the determination unit 1560 described by using fig. 15 may be implemented by the controller 2621 and/or the controller 2751. At least a portion of the functionality can also be implemented by controller 2621 and controller 2751. For example, controller 2621 and/or controller 2751 may perform the functions of collecting historical request information, determining a cache policy, generating cache policy information, determining whether there is an appropriate cache node to provide services, generating request information, determining whether a stored version is consistent with a requested version, converting a stored version into a requested version, determining whether to send a stored version directly or convert a stored version into a requested version by executing instructions stored in a corresponding memory.
The preferred embodiments of the present disclosure are described above with reference to the drawings, but the present disclosure is of course not limited to the above examples. Various changes and modifications within the scope of the appended claims may be made by those skilled in the art, and it should be understood that these changes and modifications naturally will fall within the technical scope of the present disclosure.
For example, the units shown in the functional block diagrams in the figures as dashed boxes each indicate that the functional unit is optional in the corresponding apparatus, and the respective optional functional units may be combined in an appropriate manner to implement the required functions.
For example, a plurality of functions included in one unit may be implemented by separate devices in the above embodiments. Alternatively, a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively. In addition, one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.
In this specification, the steps described in the flowcharts include not only the processing performed in time series in the described order but also the processing performed in parallel or individually without necessarily being performed in time series. Further, even in the steps processed in time series, needless to say, the order can be changed as appropriate.
Further, the present disclosure may have a configuration as described below.
1. An electronic device comprising processing circuitry configured to:
gathering history request information for each of one or more user devices, the history request information including content requested by the user device and a requested version of the content; and
one or more contents to be stored in a cache node and a stored version of each content are determined according to the historical request information.
2. The electronic device of 1, wherein the processing circuitry is further configured to:
one or more contents and a stored version of each content to be stored in the cache node are also determined according to the storage capabilities of the cache node and the computing capabilities of the serving base station of the one or more user equipments.
3. The electronic device of 1, wherein the processing circuitry is further configured to:
determining one or more contents and a stored version of each content to be stored in the cache node using an optimization problem, wherein an optimization objective of the optimization problem comprises a maximum probability that the contents and the stored version of the contents stored by the cache node can satisfy a request of a user equipment.
4. The electronic device of claim 3, wherein the content stored by the cache node and the stored version of the content being able to satisfy the request of the user device comprises: the cache node stores content requested by the user equipment, and a stored version of the content is the same as or higher than a requested version of the user equipment.
5. The electronic device of claim 3, wherein the constraints of the optimization problem include:
the total size of the content stored by the cache node and the stored version of the content is not greater than the storage capacity of the cache node; and
in the case of switching the content stored by the cache node from a high stored version to a low requested version, the total amount of computation required is no more than the computing power of the serving base station of the one or more user equipments.
6. The electronic device of 1, wherein the electronic device is located in a core network, and the processing circuitry is further configured to:
receiving the history request information from a serving base station of the one or more user equipments.
7. The electronic device of claim 6, wherein the processing circuitry is further configured to:
updating the content and the stored version stored in the cache node according to the one or more content and the stored version of each content to be stored in the cache node; and
transmitting one or more content to be stored in the cache node and a stored version of each content to the serving base station.
8. The electronic device of 1, wherein the electronic device is located in a serving base station of the one or more user devices, and the processing circuitry is further configured to:
receiving the history request information from each of the one or more user devices.
9. The electronic device of 8, wherein the processing circuitry is further configured to:
and sending one or more contents and the stored version of each content to be stored in the cache node to a core network, so that the core network can update the contents and the stored version stored in the cache node.
10. An electronic device comprising processing circuitry configured to:
receiving requested content and a requested version of the content from a user device;
requesting content from a cache node in the case that the content and a stored version of the content stored by the cache node can satisfy the request of the user equipment; and
receiving the content and a stored version of the content from the caching node,
wherein the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version.
11. The electronic device of claim 10, wherein the processing circuitry is further configured to:
requesting the content from a core network under the condition that the content stored by the cache node and the stored version of the content cannot meet the request of the user equipment; and
receiving the content and a stored version of the content from the core network.
12. The electronic device of claim 10 or 11, wherein the processing circuitry is further configured to:
and sending the content, the storage version of the cache node or the storage version of the core network to the user equipment under the condition that the storage version of the cache node or the storage version of the core network is the same as the request version.
13. The electronic device of claim 10 or 11, wherein the processing circuitry is further configured to:
converting the storage version of the cache node or the storage version of the core network into the request version under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version; and
and sending the content and the converted request version to the user equipment.
14. The electronic device of claim 10 or 11, wherein the processing circuitry is further configured to:
and under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version, sending the storage version of the cache node or the storage version of the core network to the user equipment so that the user equipment can determine whether to convert the storage version of the cache node or the storage version of the core network into the request version.
15. The electronic device of claim 10 or 11, wherein the processing circuitry is further configured to:
acquiring a charging scheme of the user equipment and channel quality between the electronic equipment and the user equipment; and
and under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version, determining whether to convert the storage version of the cache node or the storage version of the core network into the request version according to a charging scheme of the user equipment and/or the channel quality between the electronic equipment and the user equipment.
16. The electronic device of claim 10, wherein the processing circuitry is further configured to:
selecting a cache node according to the channel quality between the electronic equipment and each cache node and/or the storage version of each cache node under the condition that the content stored by a plurality of cache nodes and the storage version of the content can meet the request of the user equipment; and
requesting the content from the selected cache node.
17. A wireless communication method performed by an electronic device, comprising:
gathering history request information for each of one or more user devices, the history request information including content requested by the user device and a requested version of the content; and
one or more contents to be stored in a cache node and a stored version of each content are determined according to the historical request information.
18. The wireless communication method of claim 17, wherein determining one or more content to be stored in a cache node and a stored version of each content comprises:
one or more contents and a stored version of each content to be stored in the cache node are also determined according to the storage capabilities of the cache node and the computing capabilities of the serving base station of the one or more user equipments.
19. The wireless communication method of claim 17, wherein determining one or more content to be stored in a cache node and a stored version of each content comprises:
determining one or more contents and a stored version of each content to be stored in the cache node using an optimization problem, wherein an optimization objective of the optimization problem comprises a maximum probability that the contents and the stored version of the contents stored by the cache node can satisfy a request of a user equipment.
20. The wireless communication method of claim 19, wherein the caching node storing content and a stored version of the content that can satisfy a request of a user equipment comprises: the cache node stores content requested by the user equipment, and a stored version of the content is the same as or higher than a requested version of the user equipment.
21. The wireless communication method of claim 19, wherein the constraints of the optimization problem include:
the total size of the content stored by the cache node and the stored version of the content is not greater than the storage capacity of the cache node; and
in the case of switching the content stored by the cache node from a high stored version to a low requested version, the total amount of computation required is no more than the computing power of the serving base station of the one or more user equipments.
22. The wireless communication method of claim 17, wherein the electronic device is located in a core network, and
wherein gathering historical request information for each user device comprises: receiving the history request information from a serving base station of the one or more user equipments.
23. The wireless communication method of claim 22, wherein the wireless communication method further comprises:
updating the content and the stored version stored in the cache node according to the one or more content and the stored version of each content to be stored in the cache node; and
transmitting one or more content to be stored in the cache node and a stored version of each content to the serving base station.
24. The wireless communication method of claim 17, wherein the electronic device is located in a serving base station of the one or more user devices, and
wherein gathering historical request information for each user device comprises: receiving the history request information from each of the one or more user devices.
25. The wireless communication method of claim 24, wherein the wireless communication method further comprises:
and sending one or more contents and the stored version of each content to be stored in the cache node to a core network, so that the core network can update the contents and the stored version stored in the cache node.
26. A wireless communication method performed by an electronic device, comprising:
receiving requested content and a requested version of the content from a user device;
requesting content from a cache node in the case that the content and a stored version of the content stored by the cache node can satisfy the request of the user equipment; and
receiving the content and a stored version of the content from the caching node,
wherein the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version.
27. The wireless communication method of claim 26, wherein the wireless communication method further comprises:
requesting the content from a core network under the condition that the content stored by the cache node and the stored version of the content cannot meet the request of the user equipment; and
receiving the content and a stored version of the content from the core network.
28. The wireless communication method of claim 26 or 27, wherein the wireless communication method further comprises:
and sending the content, the storage version of the cache node or the storage version of the core network to the user equipment under the condition that the storage version of the cache node or the storage version of the core network is the same as the request version.
29. The wireless communication method of claim 26 or 27, wherein the wireless communication method further comprises:
converting the storage version of the cache node or the storage version of the core network into the request version under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version; and
and sending the content and the converted request version to the user equipment.
30. The wireless communication method of claim 26 or 27, wherein the wireless communication method further comprises:
and under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version, sending the storage version of the cache node or the storage version of the core network to the user equipment so that the user equipment can determine whether to convert the storage version of the cache node or the storage version of the core network into the request version.
31. The wireless communication method of claim 26 or 27, wherein the wireless communication method further comprises:
acquiring a charging scheme of the user equipment and channel quality between the electronic equipment and the user equipment; and
and under the condition that the storage version of the cache node or the storage version of the core network is higher than the request version, determining whether to convert the storage version of the cache node or the storage version of the core network into the request version according to a charging scheme of the user equipment and/or the channel quality between the electronic equipment and the user equipment.
32. The wireless communication method of claim 26, wherein the wireless communication method further comprises:
selecting a cache node according to the channel quality between the electronic equipment and each cache node and/or the storage version of each cache node under the condition that the content stored by a plurality of cache nodes and the storage version of the content can meet the request of the user equipment; and
requesting the content from the selected cache node.
33. A computer readable storage medium comprising executable computer instructions that when executed by a computer cause the computer to perform a wireless communication method according to any one of claims 17-32.
Although the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, it should be understood that the above-described embodiments are merely illustrative of the present disclosure and do not constitute a limitation of the present disclosure. It will be apparent to those skilled in the art that various modifications and variations can be made in the above-described embodiments without departing from the spirit and scope of the disclosure. Accordingly, the scope of the disclosure is to be defined only by the claims appended hereto, and by their equivalents.

Claims (10)

1. An electronic device comprising processing circuitry configured to:
gathering history request information for each of one or more user devices, the history request information including content requested by the user device and a requested version of the content; and
one or more contents to be stored in a cache node and a stored version of each content are determined according to the historical request information.
2. The electronic device of claim 1, wherein the processing circuit is further configured to:
one or more contents and a stored version of each content to be stored in the cache node are also determined according to the storage capabilities of the cache node and the computing capabilities of the serving base station of the one or more user equipments.
3. The electronic device of claim 1, wherein the processing circuit is further configured to:
determining one or more contents and a stored version of each content to be stored in the cache node using an optimization problem, wherein an optimization objective of the optimization problem comprises a maximum probability that the contents and the stored version of the contents stored by the cache node can satisfy a request of a user equipment.
4. The electronic device of claim 3, wherein the caching node stores content and a stored version of the content that can satisfy a request of a user device comprises: the cache node stores content requested by the user equipment, and a stored version of the content is the same as or higher than a requested version of the user equipment.
5. The electronic device of claim 3, wherein the constraints of the optimization problem include:
the total size of the content stored by the cache node and the stored version of the content is not greater than the storage capacity of the cache node; and
in the case of switching the content stored by the cache node from a high stored version to a low requested version, the total amount of computation required is no more than the computing power of the serving base station of the one or more user equipments.
6. The electronic device of claim 1, wherein the electronic device is located in a core network, and the processing circuitry is further configured to:
receiving the history request information from a serving base station of the one or more user equipments.
7. The electronic device of claim 6, wherein the processing circuit is further configured to:
updating the content and the stored version stored in the cache node according to the one or more content and the stored version of each content to be stored in the cache node; and
transmitting one or more content to be stored in the cache node and a stored version of each content to the serving base station.
8. The electronic device of claim 1, wherein the electronic device is located in a serving base station of the one or more user devices, and the processing circuitry is further configured to:
receiving the history request information from each of the one or more user devices.
9. The electronic device of claim 8, wherein the processing circuit is further configured to:
and sending one or more contents and the stored version of each content to be stored in the cache node to a core network, so that the core network can update the contents and the stored version stored in the cache node.
10. An electronic device comprising processing circuitry configured to:
receiving requested content and a requested version of the content from a user device;
requesting content from a cache node in the case that the content and a stored version of the content stored by the cache node can satisfy the request of the user equipment; and
receiving the content and a stored version of the content from the caching node,
wherein the content stored by the cache node and the stored version of the content can satisfy the request of the user equipment comprises: the cache node stores the requested content and the stored version of the content is the same as or higher than the requested version.
CN202010448165.0A 2020-05-25 2020-05-25 Electronic device, wireless communication method, and computer-readable storage medium Pending CN113727366A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202010448165.0A CN113727366A (en) 2020-05-25 2020-05-25 Electronic device, wireless communication method, and computer-readable storage medium
CN202180029482.1A CN115461736A (en) 2020-05-25 2021-05-18 Electronic device, wireless communication method, and computer-readable storage medium
PCT/CN2021/094231 WO2021238713A1 (en) 2020-05-25 2021-05-18 Electronic device, wireless communication method, and computer readable storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010448165.0A CN113727366A (en) 2020-05-25 2020-05-25 Electronic device, wireless communication method, and computer-readable storage medium

Publications (1)

Publication Number Publication Date
CN113727366A true CN113727366A (en) 2021-11-30

Family

ID=78671535

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202010448165.0A Pending CN113727366A (en) 2020-05-25 2020-05-25 Electronic device, wireless communication method, and computer-readable storage medium
CN202180029482.1A Pending CN115461736A (en) 2020-05-25 2021-05-18 Electronic device, wireless communication method, and computer-readable storage medium

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202180029482.1A Pending CN115461736A (en) 2020-05-25 2021-05-18 Electronic device, wireless communication method, and computer-readable storage medium

Country Status (2)

Country Link
CN (2) CN113727366A (en)
WO (1) WO2021238713A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070226146A1 (en) * 2006-03-24 2007-09-27 George Eino Ruul System and method for maintaining a history of transferable and updatable media
EP2487609A1 (en) * 2011-02-07 2012-08-15 Alcatel Lucent A cache manager for segmented multimedia and corresponding method for cache management
US9742860B2 (en) * 2012-02-28 2017-08-22 International Business Machines Corporation Bi-temporal key value cache system
JP6798564B2 (en) * 2017-01-12 2020-12-09 日本電気株式会社 Resource setting control device, resource setting control system, resource setting control method, and resource setting control program

Also Published As

Publication number Publication date
WO2021238713A1 (en) 2021-12-02
CN115461736A (en) 2022-12-09

Similar Documents

Publication Publication Date Title
US9917669B2 (en) Access point and communication system for resource allocation
AU2017262114B2 (en) Frequency spectrum management apparatus and method, electronic apparatus and method, and wireless communication system
US9232434B2 (en) System and method for WiFi offload
CN108900355B (en) Satellite-ground multistage edge network resource allocation method
CN107635189B (en) Beam selection method and device
CN110621040B (en) Method and system for realizing multipath parallel transmission communication
CN109151914B (en) Communication method and access network equipment
US20230254923A1 (en) Multi-link establishment method and communication apparatus
CN102869047A (en) Method and device for realizing load balance
CN103814596A (en) Method, device and system for data transmission
US9161235B2 (en) Frequency band determination method in coexistence scheme
CN109845312B (en) Data transmission method and device, computer equipment and system
WO2012151921A1 (en) Service transmission method and device for multi-interface terminal
KR102053766B1 (en) Multi―cell selection method and distrubuted data transmission method to provide enhanced mobile data transmission in wireless overlay network
US8954087B2 (en) Apparatus and method for providing communication services via television white spaces
CN112469132B (en) Carrier resource scheduling method and device
CN113727366A (en) Electronic device, wireless communication method, and computer-readable storage medium
CN111480361B (en) Base station device, terminal device, and wireless communication method
CN114095869B (en) Method, device and system for scheduling multi-access edge computing nodes for terminal
CA3072137C (en) System and method for enhanced client roaming
CN116530202A (en) Method and device for dual connectivity
WO2019187163A1 (en) Communication control device, wireless device, and wireless communication system
CN111065167A (en) BSR reporting method, terminal and network side equipment
CN109691205A (en) Network node, user apparatus and method for wireless communication system
JP2019009557A (en) Network system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication