CN113098941A - Virtual reality content distributed management method and system based on integral excitation - Google Patents

Virtual reality content distributed management method and system based on integral excitation Download PDF

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CN113098941A
CN113098941A CN202110320687.7A CN202110320687A CN113098941A CN 113098941 A CN113098941 A CN 113098941A CN 202110320687 A CN202110320687 A CN 202110320687A CN 113098941 A CN113098941 A CN 113098941A
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CN113098941B (en
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张宏鑫
周侃
徐律涛
谢光桓
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Zhejiang University ZJU
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    • H—ELECTRICITY
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    • H04L67/00—Network arrangements or protocols for supporting network services or applications
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    • H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees

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Abstract

The invention provides a virtual reality content distributed management method and system based on integral excitation, wherein the method specifically comprises the following steps: uploading the watermark to the virtual reality content and embedding the watermark into the platform to obtain the virtual reality multimedia content with the watermark; uploading the virtual reality content with the watermark to a storage platform based on the IPFS to obtain a hash value stored by the IPFS and an uploading event timestamp; uploading the hash value stored by the IPFS, the uploading event timestamp and the virtual reality content description information to a virtual reality multimedia information sharing platform based on the alliance chain; and applying an incentive mechanism based on sharing scores on a virtual reality multimedia information sharing platform based on the alliance chain to encourage users to share virtual reality multimedia contents. On the premise of protecting works and privacy of users, the invention realizes a high-efficiency, stable and high-sharing-rate virtual reality content storage distributed system.

Description

Virtual reality content distributed management method and system based on integral excitation
Technical Field
The invention relates to the field of block chains and distributed storage, in particular to a virtual reality content distributed management method and system based on integral excitation.
Background
With the development of virtual reality technology, the application ecology of virtual reality is also continuously improved, the existing virtual reality multimedia content platform mostly adopts centralized management, and the traditional centralized management has the problems of low bandwidth utilization rate and high delay. An InterPlanetary File System (IPFS) is a distributed File System for storing and sharing data, and if only the IPFS is used, when a node online rate is low, efficiency of the System is greatly reduced. Meanwhile, the sharing rate in the virtual reality multimedia content storage platform is generally low due to the fact that the volumes of virtual reality multimedia content files such as the 3D model and the like are generally large. Therefore, a stable, high-sharing, low-delay and efficient virtual reality multimedia content management method and system are yet to be proposed.
Disclosure of Invention
The invention provides a virtual reality content distributed management method and a system based on integral excitation, which specifically comprise the following contents:
a distributed management method for virtual reality content based on integral excitation specifically comprises the following steps:
s1, uploading the virtual reality multimedia content to a virtual reality content watermark embedding platform to obtain the virtual reality multimedia content with the watermark;
s2, uploading the virtual reality multimedia content with the watermark to a storage platform based on the IPFS to obtain a hash value stored by the IPFS and an uploading event timestamp;
s3, uploading the hash value stored by the IPFS, the uploading event timestamp and the virtual reality multimedia content description information to a virtual reality multimedia information sharing platform based on a alliance chain;
and S4, applying an incentive mechanism based on sharing points on the virtual reality multimedia information sharing platform based on the alliance chain, and motivating the user to share the virtual reality multimedia content.
Further, in step S1, the watermark embedding process of the virtual reality multimedia content specifically includes:
s11, uploading a watermark image to be embedded and virtual reality multimedia content to a user, wherein the watermark image and the virtual reality multimedia content comprise three-dimensional graphs, two-dimensional images, videos and audios;
s12, introducing the chaotic sequence to encrypt the watermark image to obtain an encrypted watermark image;
and S13, embedding the encrypted watermark image into the virtual reality multimedia content.
Further, the IPFS-based storage platform specifically includes:
an IPFS basic network, which is used for the connection of network nodes, the block of the stored content and the exchange function of the data block;
the external storage server is used for providing the computing power of the architecture and realizing the service interaction logic;
the data block balancing protocol is used for ensuring the data content balance among the nodes in the network and reducing the possibility of occupying the uplink bandwidth by the data hot spots;
and the external storage protocol is used for providing larger uplink bandwidth for the user under the condition of lower line rate on the node.
Further, the data block balancing protocol specifically includes:
distributing a certain number of tokens to all physical nodes in a network on the IPFS according to the storage capacity, wherein each token corresponds to a virtual node with equivalent storage capacity in a Kadmelia distributed hash table;
the physical node needs to record the times of each cache data block acquired by other nodes, each fixed period is marked as an LRU data block by using a Least Recently Used (LRU) principle, and the LRU data block is backed up in the next period;
and positioning a virtual node closest to the hash value of the data block on the hash ring by using a Kadmelia routing algorithm, and mapping the virtual node to a corresponding physical node, wherein the physical node is a backup node of the LRU data block.
Further, the external storage protocol specifically includes:
when the online rate of the system node is low, the storage system is switched to an Object Storage Server (OSS) taking cloud storage as a main factor from IPFS (internet protocol file system) and is accelerated by using a Content Delivery Network (CDN);
when the system is mainly transferred to cloud storage, the nodes directly request and upload data to the OSS, and the file arrangement of the OSS is as follows: files are stored in folders in the form of data blocks, the folders being named as: MD5 value of file, data block naming format: data block MD5 value _ data block sequence number;
the node maintains the uploading and downloading queues of the files and provides two uploading modes for users: the method comprises the steps of directly uploading without limitation of bandwidth and uploading in sections with limitation of bandwidth, when a file is uploaded, firstly checking whether the file exists in an uploading queue or is uploaded, after the file is determined not to be uploaded, dividing the file into a plurality of data blocks with maximum 256kB for uploading, and adding the data blocks into the uploading queue.
Further, in step S4, the excitation mechanism based on the shared integral specifically includes:
s41, initialization: initializing a group of public and private keys and a point address for each participating node (the number of the participating nodes is set as N), and respectively recording the public key, the private key and the point address as p for the nth noden、snAnd an；
S42, information sharing: when the nth node shares the jth group information dn,jWhen using the public key p firstnEncryption dn,jObtaining the encrypted information pn(dn,j)，pn(dn,j)、sn、anAnd a description of the information T (d)n,j) Sending the information to the alliance chain, after the alliance chain receives the information, numbering the information according to the received sequence by using an intelligent contract, and recording the k-th received information as DkAnd using smart contracts to integrate address anIn increasing the integral b1Information number DkAnd information description T (d)n,j) Visible to Federation chain members, pn(dn,j)、sn、anIs invisible;
s43, checking and grading: when member node m of the alliance chain wants to view information DkWhen it is, DkAnd its own integration address amSending to the alliance chain, and judging the integral address a by using the intelligent contractmWhether the integral in (1) is greater than the product required to view the shared dataB is divided into2. If a ismIs greater than or equal to b2Then use DkS ofnFor encrypted data pn(dn,j) Decrypting to obtain decrypted data dn,jAnd d isn,jSends it to node m and at the same time integrates b3As reward to the point address anNode m is obtaining information DkThen, an evaluation (quality or poor quality) is made of the information;
s44, evaluation reward: when the good (or bad) evaluation of the information is greater than or equal to the total evaluation value 2/3, the information is marked as good (or bad) information, and the nodes sharing the information obtain the point reward b3(or integral penalty-b3) Nodes in accordance with the evaluation receive a reward b4Inconsistent acquisition penalty-b4。
A distributed management system for virtual reality content based on integral excitation specifically comprises:
the virtual reality multimedia content watermark embedding platform is used for embedding a watermark into the virtual reality multimedia content and acquiring the virtual reality multimedia content with the watermark;
the virtual reality multimedia content storage platform based on the IPFS is used for storing virtual reality multimedia content and providing a virtual reality multimedia content IPFS storage hash value and an uploading timestamp;
the alliance chain virtual reality multimedia information sharing platform applying an incentive mechanism based on sharing points is used for uploading IPFS (internet protocol file system) storage hash values, uploading timestamps and description information of virtual reality multimedia contents and motivating users to share information.
Further, the working process of the virtual reality multimedia content watermark embedding platform specifically comprises the following steps:
a user uploads a watermark image to be embedded and virtual reality multimedia content including a three-dimensional graph, a two-dimensional image, a video and an audio; introducing a chaotic sequence to encrypt the watermark image to obtain an encrypted watermark image; and embedding the encrypted watermark image into the virtual reality multimedia content.
Further, the IPFS-based storage platform specifically includes:
an IPFS basic network, which is used for the connection of network nodes, the block of the stored content and the exchange function of the data block;
the external storage server is used for providing the computing power of the architecture and realizing the service interaction logic;
the data block balancing protocol is used for ensuring the data content balance among the nodes in the network and reducing the possibility of occupying the uplink bandwidth by the data hot spots;
and the external storage protocol is used for providing larger uplink bandwidth for the user under the condition of lower line rate on the node.
Further, the data block balancing protocol specifically includes:
distributing a certain number of tokens to all physical nodes in a network on the IPFS according to the storage capacity, wherein each token corresponds to a virtual node with equivalent storage capacity in a Kadmelia distributed hash table;
the physical node needs to record the times of each cache data block acquired by other nodes, each fixed period is marked as an LRU data block by using a Least Recently Used (LRU) principle, and the LRU data block is backed up in the next period;
and positioning a virtual node closest to the hash value of the data block on the hash ring by using a Kadmelia routing algorithm, and mapping the virtual node to a corresponding physical node, wherein the physical node is a backup node of the LRU data block.
Further, the external storage protocol specifically includes:
when the online rate of the system node is low, the storage system is switched to an Object Storage Server (OSS) taking cloud storage as a main factor from IPFS (internet protocol file system) and is accelerated by using a Content Delivery Network (CDN);
when the system is mainly transferred to cloud storage, the nodes directly request and upload data to the OSS, and the file arrangement of the OSS is as follows: files are stored in folders in the form of data blocks, the folders being named as: MD5 value of file, data block naming format: data block MD5 value _ data block sequence number;
the node maintains the uploading and downloading queues of the files and provides two uploading modes for users: the method comprises the steps of directly uploading without limitation of bandwidth and uploading in sections with limitation of bandwidth, when a file is uploaded, firstly checking whether the file exists in an uploading queue or is uploaded, after the file is determined not to be uploaded, dividing the file into a plurality of data blocks with maximum 256kB for uploading, and adding the data blocks into the uploading queue.
Further, the excitation mechanism based on the shared integral specifically includes:
initialization: initializing a group of public and private keys and a point address for each participating node (the number of the participating nodes is set as N), and respectively recording the public key, the private key and the point address as p for the nth noden、snAnd an；
Information sharing: when the nth node shares the jth group information dn,jWhen using the public key p firstnEncryption dn,jObtaining the encrypted information pn(dn,j)，pn(dn,j)、sn、anAnd a description of the information T (d)n,j) Sending the information to the alliance chain, after the alliance chain receives the information, numbering the information according to the received sequence by using an intelligent contract, and recording the k-th received information as DkAnd using smart contracts to integrate address anIn increasing the integral b1Information number DkAnd information description T (d)n,j) Visible to Federation chain members, pn(dn,j)、sn、anIs invisible;
and (3) viewing and scoring: when member node m of the alliance chain wants to view information DkWhen it is, DkAnd its own integration address amSending to the alliance chain, and judging the integral address a by using the intelligent contractmIs greater than the integral b needed to view the shared data2. If a ismIs greater than or equal to b2Then use DkS ofnFor encrypted data pn(dn,j) Decrypting to obtain decrypted data dn,jAnd d isn,jSends it to node m and at the same time integrates b3As reward to the point address anNode m is obtaining information DkAfter that time, the user can use the device,making an assessment (quality or poor) of this information;
and (3) evaluating the reward: when the good (or bad) evaluation of the information is greater than or equal to the total evaluation value 2/3, the information is marked as good (or bad) information, and the nodes sharing the information obtain the point reward b3(or integral penalty-b3) Nodes in accordance with the evaluation receive a reward b4Inconsistent acquisition penalty-b4。
The invention has the following beneficial technical effects:
the invention provides a distributed management method and a distributed management system for virtual reality content based on point incentive, which are based on a virtual reality multimedia content storage platform of an interplanetary file system and a virtual reality multimedia information sharing platform based on an alliance chain, and meanwhile, a point sharing mechanism is adopted to encourage users to share information. After the user uploads the virtual reality multimedia file on the storage platform, the file storage information of the storage platform and the file description information are shared on the alliance chain, and points are obtained. Meanwhile, other nodes on the alliance chain can acquire corresponding information under certain conditions, and make evaluation, evaluation and information acquisition all influence the integral value of the nodes on the alliance chain to a certain extent. On the premise of protecting works and privacy of users, the invention realizes a high-efficiency, stable and high-sharing-rate virtual reality content storage distributed system.
Drawings
FIG. 1 is a storage architecture based on IPFS of the distributed management method and system for virtual reality content based on integral excitation according to the present invention;
FIG. 2 is a diagram of a shared-credit-based incentive mechanism of the inventive method and system for distributed management of virtual reality content based on credit incentives.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The first embodiment is as follows:
the embodiment provides a distributed management method for virtual reality content based on integral excitation, which comprises the following steps:
s1, uploading the virtual reality multimedia content to a virtual reality content watermark embedding platform to obtain the virtual reality multimedia content with the watermark;
s2, uploading the virtual reality multimedia content with the watermark to a storage platform based on the IPFS to obtain a hash value stored by the IPFS and an uploading event timestamp;
s3, uploading the hash value stored by the IPFS, the uploading event timestamp and the virtual reality multimedia content description information to a virtual reality multimedia information sharing platform based on a alliance chain;
and S4, applying an incentive mechanism based on sharing points on the virtual reality multimedia information sharing platform based on the alliance chain, and motivating the user to share the virtual reality multimedia content.
In an embodiment, the watermark embedding process of the virtual reality multimedia content specifically includes:
a user uploads a watermark image to be embedded and virtual reality multimedia content including a three-dimensional graph, a two-dimensional image, a video and an audio; introducing a chaotic sequence to encrypt the watermark image to obtain an encrypted watermark image; and embedding the encrypted watermark image into the virtual reality multimedia content.
In an illustrated embodiment, the IPFS-based storage platform is shown in fig. 1, and specifically includes:
an IPFS basic network, which is used for the connection of network nodes, the block of the stored content and the exchange function of the data block;
the external storage server is used for providing the computing power of the architecture and realizing the service interaction logic;
the data block balancing protocol is used for ensuring the data content balance among the nodes in the network and reducing the possibility of occupying the uplink bandwidth by the data hot spots;
and the external storage protocol is used for providing larger uplink bandwidth for the user under the condition of lower line rate on the node.
In an embodiment, the data block balancing protocol specifically includes:
distributing a certain number of tokens to all physical nodes in a network on the IPFS according to the storage capacity, wherein each token corresponds to a virtual node with equivalent storage capacity in a Kadmelia distributed hash table;
the physical node needs to record the times of each cache data block acquired by other nodes, each fixed period is marked as an LRU data block by using a Least Recently Used (LRU) principle, and the LRU data block is backed up in the next period;
and positioning a virtual node closest to the hash value of the data block on the hash ring by using a Kadmelia routing algorithm, and mapping the virtual node to a corresponding physical node, wherein the physical node is a backup node of the LRU data block.
In an embodiment, the external storage protocol specifically includes:
when the online rate of the system node is low, the storage system is switched to an Object Storage Server (OSS) taking cloud storage as a main factor from IPFS (internet protocol file system) and is accelerated by using a Content Delivery Network (CDN);
when the system is mainly transferred to cloud storage, the nodes directly request and upload data to the OSS, and the file arrangement of the OSS is as follows: files are stored in folders in the form of data blocks, the folders being named as: MD5 value of file, data block naming format: data block MD5 value _ data block sequence number;
the node maintains the uploading and downloading queues of the files and provides two uploading modes for users: the method comprises the steps of directly uploading without limitation of bandwidth and uploading in sections with limitation of bandwidth, when a file is uploaded, firstly checking whether the file exists in an uploading queue or is uploaded, after the file is determined not to be uploaded, dividing the file into a plurality of data blocks with maximum 256kB for uploading, and adding the data blocks into the uploading queue.
In an illustrated embodiment, the excitation mechanism based on the shared integral, as shown in fig. 2, specifically includes:
initialization: initializing a group of public and private keys and a point address for each participating node (the number of the participating nodes is set as N), and respectively recording the public key, the private key and the point address as p for the nth noden、snAnd an；
Information sharing: when the nth node shares the jth group information dn,jWhen using the public key p firstnEncryption dn,jObtaining the encrypted information pn(dn,j)，pn(dn,j)、sn、anAnd a description of the information T (d)n,j) Sending the information to the alliance chain, after the alliance chain receives the information, numbering the information according to the received sequence by using an intelligent contract, and recording the k-th received information as DkAnd using smart contracts to integrate address anIn increasing the integral b1Information number DkAnd information description T (d)n,j) Visible to Federation chain members, pn(dn,j)、sn、anIs invisible;
and (3) viewing and scoring: when member node m of the alliance chain wants to view information DkWhen it is, DkAnd its own integration address amSending to the alliance chain, and judging the integral address a by using the intelligent contractmIs greater than the integral b needed to view the shared data2. If a ismIs greater than or equal to b2Then use DkS ofnFor encrypted data pn(dn,j) Decrypting to obtain decrypted data dn,jAnd d isn,jSends it to node m and at the same time integrates b3As reward to the point address anNode m is obtaining information DkThen, an evaluation (quality or poor quality) is made of the information;
and (3) evaluating the reward: when the good (or bad) evaluation of the information is greater than or equal to the total evaluation value 2/3, the information is marked as good (or bad) information, and the nodes sharing the information obtain the point reward b3(or integral penalty-b3) Nodes in accordance with the evaluation receive a reward b4Inconsistent acquisition penalty-b4。
Example two:
the embodiment provides a distributed management system for virtual reality content based on integral excitation, which comprises:
the virtual reality multimedia content watermark embedding platform is used for embedding a watermark into the virtual reality multimedia content and acquiring the virtual reality multimedia content with the watermark;
the virtual reality multimedia content storage platform based on the IPFS is used for storing virtual reality multimedia content and providing a virtual reality multimedia content IPFS storage hash value and an uploading timestamp;
the alliance chain virtual reality multimedia information sharing platform applying an incentive mechanism based on sharing points is used for uploading IPFS (internet protocol file system) storage hash values, uploading timestamps and description information of virtual reality multimedia contents and motivating users to share information.
In an embodiment, the working process of the virtual reality multimedia content watermark embedding platform specifically includes:
a user uploads a watermark image to be embedded and virtual reality multimedia content including a three-dimensional graph, a two-dimensional image, a video and an audio; introducing a chaotic sequence to encrypt the watermark image to obtain an encrypted watermark image; and embedding the encrypted watermark image into the virtual reality multimedia content.
In an embodiment, the IPFS-based storage platform specifically includes:
an IPFS basic network, which is used for the connection of network nodes, the block of the stored content and the exchange function of the data block;
the external storage server is used for providing the computing power of the architecture and realizing the service interaction logic;
the data block balancing protocol is used for ensuring the data content balance among the nodes in the network and reducing the possibility of occupying the uplink bandwidth by the data hot spots;
and the external storage protocol is used for providing larger uplink bandwidth for the user under the condition of lower line rate on the node.
In an embodiment, the data block balancing protocol specifically includes:
distributing a certain number of tokens to all physical nodes in a network on the IPFS according to the storage capacity, wherein each token corresponds to a virtual node with equivalent storage capacity in a Kadmelia distributed hash table;
the physical node needs to record the times of each cache data block acquired by other nodes, each fixed period is marked as an LRU data block by using a Least Recently Used (LRU) principle, and the LRU data block is backed up in the next period;
and positioning a virtual node closest to the hash value of the data block on the hash ring by using a Kadmelia routing algorithm, and mapping the virtual node to a corresponding physical node, wherein the physical node is a backup node of the LRU data block.
In an embodiment, the external storage protocol specifically includes:
when the online rate of the system node is low, the storage system is switched to an Object Storage Server (OSS) taking cloud storage as a main factor from IPFS (internet protocol file system) and is accelerated by using a Content Delivery Network (CDN);
when the system is mainly transferred to cloud storage, the nodes directly request and upload data to the OSS, and the file arrangement of the OSS is as follows: files are stored in folders in the form of data blocks, the folders being named as: MD5 value of file, data block naming format: data block MD5 value _ data block sequence number;
the node maintains the uploading and downloading queues of the files and provides two uploading modes for users: the method comprises the steps of directly uploading without limitation of bandwidth and uploading in sections with limitation of bandwidth, when a file is uploaded, firstly checking whether the file exists in an uploading queue or is uploaded, after the file is determined not to be uploaded, dividing the file into a plurality of data blocks with maximum 256kB for uploading, and adding the data blocks into the uploading queue.
In an illustrative embodiment, the shared integral-based excitation mechanism specifically includes:
initialization: initializing a group of public and private keys and a point address for each participating node (the number of the participating nodes is set as N), and respectively recording the public key, the private key and the point address as p for the nth noden、snAnd an；
Information sharing: when the nth node shares the jth group information dn,jWhen using the public key p firstnEncryption dn,jObtaining the encrypted information pn(dn,j)，pn(dn,j)、sn、anAnd a description of the information T (d)n,j) Sending the information to the alliance chain, after the alliance chain receives the information, numbering the information according to the received sequence by using an intelligent contract, and recording the k-th received information as DkAnd using smart contracts to integrate address anIn increasing the integral b1Information number DkAnd information description T (d)n,j) Visible to Federation chain members, pn(dn,j)、sn、anIs invisible;
and (3) viewing and scoring: when member node m of the alliance chain wants to view information DkWhen it is, DkAnd its own integration address amSending to the alliance chain, and judging the integral address a by using the intelligent contractmIs greater than the integral b needed to view the shared data2. If a ismIs greater than or equal to b2Then use DkS ofnFor encrypted data pn(dn,j) Decrypting to obtain decrypted data dn,jAnd d isn,jSends it to node m and at the same time integrates b3As reward to the point address anNode m is obtaining information DkThen, an evaluation (quality or poor quality) is made of the information;
and (3) evaluating the reward: when the good (or bad) evaluation of the information is greater than or equal to the total evaluation value 2/3, the information is marked as good (or bad) information, and the nodes sharing the information obtain the point reward b3(or integral penalty-b3) Nodes in accordance with the evaluation receive a reward b4Inconsistent acquisition penalty-b4。
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (12)

1. The distributed management method for the virtual reality content based on the integral incentive is characterized by comprising the following steps:
s1, uploading the virtual reality multimedia content to a virtual reality content watermark embedding platform to obtain the virtual reality multimedia content with the watermark;
s2, uploading the virtual reality multimedia content with the watermark to a storage platform based on the IPFS to obtain a hash value stored by the IPFS and an uploading event timestamp;
s3, uploading the hash value stored by the IPFS, the uploading event timestamp and the virtual reality multimedia content description information to a virtual reality multimedia information sharing platform based on a alliance chain;
and S4, applying an incentive mechanism based on sharing points on the virtual reality multimedia information sharing platform based on the alliance chain, and motivating the user to share the virtual reality multimedia content.
2. The distributed management method for virtual reality content based on integral excitation according to claim 1, wherein in step S1, the watermark embedding process for virtual reality multimedia content specifically includes:
a user uploads a watermark image to be embedded and virtual reality multimedia content; introducing a chaotic sequence to encrypt the watermark image to obtain an encrypted watermark image; and embedding the encrypted watermark image into the virtual reality multimedia content.
3. The distributed management method for virtual reality content based on integrated incentives according to claim 1, wherein the IPFS based storage platform specifically comprises:
an IPFS basic network, which is used for the connection of network nodes, the block of the stored content and the exchange function of the data block;
the external storage server is used for providing the computing power of the architecture and realizing the service interaction logic;
the data block balancing protocol is used for ensuring the data content balance among the nodes in the network and reducing the possibility of occupying the uplink bandwidth by the data hot spots;
and the external storage protocol is used for providing larger uplink bandwidth for the user under the condition of lower line rate on the node.
4. The distributed management method for virtual reality content based on integral excitation according to claim 3, wherein the data block balancing protocol specifically comprises:
distributing a certain number of tokens to all physical nodes in a network on the IPFS according to the storage capacity, wherein each token corresponds to a virtual node with equivalent storage capacity in a Kadmelia distributed hash table;
the physical node records the times of each cache data block acquired by other nodes, each fixed period is marked as an LRU data block by using a least recently used principle, and the LRU data block is backed up in the next period;
and positioning a virtual node closest to the hash value of the data block on the hash ring by using a Kadmelia routing algorithm, and mapping the virtual node to a corresponding physical node, wherein the physical node is a backup node of the LRU data block.
5. The distributed management method for virtual reality contents based on integrated excitation according to claim 3, wherein the external storage protocol specifically comprises:
when the online rate of the system node is low, the storage system is switched to an object storage server taking cloud storage as the leading factor from IPFS (internet protocol file system) leading, and is accelerated by using a content distribution network;
when the system is mainly transferred to cloud storage, the nodes directly request and upload data to the OSS, and the file arrangement of the OSS is as follows: files are stored in folders in the form of data blocks, the folders being named as: MD5 value of file, data block naming format: data block MD5 value _ data block sequence number;
the node maintains the uploading and downloading queues of the files and provides two uploading modes for users: the method comprises the steps of directly uploading without limitation of bandwidth and uploading in sections with limitation of bandwidth, when a file is uploaded, firstly checking whether the file exists in an uploading queue or is uploaded, after the file is determined not to be uploaded, dividing the file into a plurality of data blocks with maximum 256kB for uploading, and adding the data blocks into the uploading queue.
6. The distributed management method for virtual reality content based on integral incentive according to any one of claims 1-5, wherein in step S4, the incentive mechanism based on shared integral specifically comprises:
s41, initialization: setting the number of participating nodes as N, initializing a group of public and private keys and a point address for each participating node, and respectively recording the public key, the private key and the point address as p for the nth noden、snAnd an；
S42, information sharing: when the nth node shares the jth group information dn,jWhen using the public key p firstnEncryption dn,jObtaining the encrypted information pn(dn,j)，pn(dn,j)、sn、anAnd a description of the information T (d)n,j) Sending the information to the alliance chain, after the alliance chain receives the information, numbering the information according to the received sequence by using an intelligent contract, and recording the k-th received information as DkAnd using smart contracts to integrate address anIn increasing the integral b1Information number DkAnd information description T (d)n,j) Visible to Federation chain members, pn(dn,j)、sn、anIs invisible;
s43, checking and grading: when member node m of the alliance chain wants to view information DkWhen it is, DkAnd its own integration address amSending to the alliance chain, and judging the integral address a by using the intelligent contractmIs greater than the integral b needed to view the shared data2(ii) a If a ismIs greater than or equal to b2Then use DkS ofnFor encrypted data pn(dn,j) Decrypting to obtain decrypted data dn,jAnd d isn,jSends it to node m and at the same time integrates b3As reward to the point address anNode m is obtaining information DkThen, evaluating the information to obtain high quality or low quality;
s44 evaluationRewarding: when the high-quality or poor-quality evaluation of the information is greater than or equal to the total evaluation number 2/3, the information is marked as high-quality or poor-quality information, and the nodes sharing the information obtain the point reward b3Or integral penalty-b3Nodes in accordance with the evaluation receive a reward b4Inconsistent acquisition penalty-b4。
7. The distributed management system of virtual reality content based on integral excitation is characterized by comprising:
the virtual reality multimedia content watermark embedding platform is used for embedding a watermark into the virtual reality multimedia content and acquiring the virtual reality multimedia content with the watermark;
the virtual reality multimedia content storage platform based on the IPFS is used for storing virtual reality multimedia content and providing a virtual reality multimedia content IPFS storage hash value and an uploading timestamp;
the alliance chain virtual reality multimedia information sharing platform applying an incentive mechanism based on sharing points is used for uploading IPFS (internet protocol file system) storage hash values, uploading timestamps and description information of virtual reality multimedia contents and motivating users to share information.
8. The distributed management system for virtual reality content based on integral excitation according to claim 7, wherein the working process of the virtual reality multimedia content watermark embedding platform is specifically as follows:
a user uploads a watermark image to be embedded and virtual reality multimedia content; introducing a chaotic sequence to encrypt the watermark image to obtain an encrypted watermark image; and embedding the encrypted watermark image into the virtual reality multimedia content.
9. The distributed management system for virtual reality content based on integrated incentives according to claim 7, wherein the IPFS based storage platform comprises in particular:
an IPFS basic network, which is used for the connection of network nodes, the block of the stored content and the exchange function of the data block;
the external storage server is used for providing the computing power of the architecture and realizing the service interaction logic;
the data block balancing protocol is used for ensuring the data content balance among the nodes in the network and reducing the possibility of occupying the uplink bandwidth by the data hot spots;
and the external storage protocol is used for providing larger uplink bandwidth for the user under the condition of lower line rate on the node.
10. The distributed management system for virtual reality content based on integrated incentives according to claim 9, wherein the data block balancing protocol specifically includes:
distributing a certain number of tokens to all physical nodes in a network on the IPFS according to the storage capacity, wherein each token corresponds to a virtual node with equivalent storage capacity in a Kadmelia distributed hash table;
the physical node needs to record the times of each cache data block acquired by other nodes, each fixed period is marked as an LRU data block by using a least recently used principle, and the LRU data block is backed up in the next period;
and positioning a virtual node closest to the hash value of the data block on the hash ring by using a Kadmelia routing algorithm, and mapping the virtual node to a corresponding physical node, wherein the physical node is a backup node of the LRU data block.
11. The distributed management system for virtual reality content based on integrated incentives according to claim 9, characterized in that the external storage protocol comprises in particular:
when the online rate of the system node is low, the storage system is switched to an object storage server taking cloud storage as the leading factor from IPFS (internet protocol file system) leading, and is accelerated by using a content distribution network;
when the system is mainly transferred to cloud storage, the nodes directly request and upload data to the OSS, and the file arrangement of the OSS is as follows: files are stored in folders in the form of data blocks, the folders being named as: MD5 value of file, data block naming format: data block MD5 value _ data block sequence number;
the node maintains the uploading and downloading queues of the files and provides two uploading modes for users: the method comprises the steps of directly uploading without limitation of bandwidth and uploading in sections with limitation of bandwidth, when a file is uploaded, firstly checking whether the file exists in an uploading queue or is uploaded, after the file is determined not to be uploaded, dividing the file into a plurality of data blocks with maximum 256kB for uploading, and adding the data blocks into the uploading queue.
12. The distributed management system for virtual reality content based on credit incentives according to any one of claims 7 to 11, wherein the credit-sharing based incentive mechanism specifically comprises:
initialization: setting the number of participating nodes as N, initializing a group of public and private keys and a point address for each participating node, and respectively recording the public key, the private key and the point address as p for the nth noden、snAnd an；
Information sharing: when the nth node shares the jth group information dn,jWhen using the public key p firstnEncryption dn,jObtaining the encrypted information pn(dn,j)，pn(dn,j)、sn、anAnd a description of the information T (d)n,j) Sending the information to the alliance chain, after the alliance chain receives the information, numbering the information according to the received sequence by using an intelligent contract, and recording the k-th received information as DkAnd using smart contracts to integrate address anIn increasing the integral b1Information number DkAnd information description T (d)n,j) Visible to Federation chain members, pn(dn,j)、sn、anIs invisible;
and (3) viewing and scoring: when member node m of the alliance chain wants to view information DkWhen it is, DkAnd its own integration address amSending to the alliance chain, and judging the integral address a by using the intelligent contractmIs greater than the integral b needed to view the shared data2(ii) a If a ismIs greater than or equal to b2Then use DkS ofnFor encrypted data pn(dn,j) Decrypting to obtain decrypted data dn,jAnd d isn,jSends it to node m and at the same time integrates b3As reward to the point address anNode m is obtaining information DkThen, evaluating the information to obtain high quality or low quality;
and (3) evaluating the reward: when the high-quality or poor-quality evaluation of the information is greater than or equal to the total evaluation number 2/3, the information is marked as high-quality or poor-quality information, and the nodes sharing the information obtain the point reward b3Or integral penalty-b3Nodes in accordance with the evaluation receive a reward b4Inconsistent acquisition penalty-b4。
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