CN101873348A - Cloud storage system based on network egress device and network access method thereof - Google Patents

Abstract

The invention discloses a cloud storage system, comprising: a plurality of local area network export devices as super nodes, the said export devices are connected through the Internet, are always online, and are connected to a plurality of user terminals in the local area network where they are located. Also disclosed is a network access method based on the above-mentioned cloud storage system, including: the user terminal in the local area network requests network resources through network query; if the requested complete network resource does not exist in the local area network, the user terminal passes A supernode requests network resources outside the local area network. The present invention configures the LAN egress device as a super node, merges and acts as a proxy for user terminals in the LAN to download network resources, avoids a large amount of redundant traffic caused by repeated downloads of the same external network resources by users in the network, and improves the bandwidth of the LAN egress and the ISP backbone Effective utilization of network bandwidth. At the same time, the cloud storage system composed of supernodes of LAN export devices has a stable architecture that is always online.

Description

Cloud storage system based on network egress device and network access method thereof

technical field

The present invention relates to the field of computer network technology, in particular to a cloud storage system based on a network egress device and a network access method thereof

Background technique

In traditional peer-to-peer (P2P) networks, end users directly establish P2P connections with hosts on the external network, which is filled with a large amount of redundant P2P traffic. These P2P traffic occupies a large amount of egress bandwidth of the campus network, seriously affecting the normal use of other network applications. At present, the commonly used method is to deploy flow control devices at the egress of the campus network or the entrance of the ISP (Internet Service Provider) network, and limit the speed of these traffic through the flow control devices to reduce bandwidth pressure.

But the disadvantages of this method are also obvious:

1. This method can only prolong the user's download time, but cannot reduce redundant traffic in the egress bandwidth;

2. For more and more popular network applications such as Internet Protocol Television (IPTV) and the upcoming High Definition Internet Protocol Television (HD-IPTV), simply limiting the speed of the program will lead to Frequent stuck, which further increases user dissatisfaction with network congestion;

3. The traditional P2P network is composed of unstable user terminals. The frequent log-off and log-off of terminal users can easily lead to jitter in P2P downloads, affecting the download speed of video programs and the online viewing experience.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the invention is: how to greatly reduce the redundant traffic at the egress of the local area network, effectively improve the utilization rate of the egress bandwidth, and at the same time improve the speed and stability of P2P downloading.

(2) Technical solutions

A cloud storage system, comprising: several LAN outlet devices as super nodes, the outlet devices are connected through the Internet, are always online, and are connected to several user terminals in the local area network where they are located.

Wherein, the said egress devices are connected by P2P.

Wherein, the connection between the egress device and the user terminal in its local area network is a P2P connection;

Wherein, the network egress device is a network device with a flow control function.

A network access method based on the above-mentioned cloud storage system, comprising the steps of:

S101: A user terminal in the local area network requests network resources through a network query;

S102: If there is no network resource to be requested in the local area network, the user terminal requests the network resource outside the local area network through a super node in the local area network;

S103: If the requested network resource exists in the local area network, the user terminal establishes a P2P connection with a super node containing the network resource in the local area network and other user terminals containing the network resource, and downloads the network resource;

S104: If only a part of the requested network resource exists in the local area network, download the part of the network resource that does not exist in the local area network according to step S102, and download the part of the network resource that exists in the local area network according to step S103.

Wherein, the step S102 specifically includes:

S1021: The user terminal establishes a P2P connection with the supernode in the local area network, and requests the supernode in the local area network to download the network resource as an agent;

S1022: The supernode in the local area network establishes a P2P connection with other supernodes or sources of network resources in the Internet, downloads the network resources, and saves the downloaded network resources locally;

S1023: The user terminal downloads the network resource from the super node in the local area network.

Wherein, in step S1021, if multiple users in the local area network request the supernode to proxy download the same network resource outside the local area network, the supernode will combine these requests into one external download request.

Wherein, when the supernode in the local area network downloads the network resource, if the local storage space is insufficient, the storage space is cleared to accommodate the network resource.

Wherein, the network resources include: files and network video resources.

(3) Beneficial effects

The present invention sets the local area network exit device as a super node, merges and acts as a proxy for user terminals in the local area network to download network resources, avoids redundant network traffic caused by repeated downloads of the same external network resources, greatly reduces the bandwidth pressure of the local area network exit, and improves Effective utilization of LAN egress bandwidth and ISP backbone network bandwidth; at the same time, supernodes composed of LAN egress devices are always online, and the cloud storage system composed of multiple supernodes has a stable architecture, avoiding the frequent The problem of structural instability caused by going online and offline has improved the stability of user downloads and the experience of watching video programs online.

Description of drawings

Fig. 1 is a logical structural diagram of a cloud storage system according to an embodiment of the present invention;

Fig. 2 is a flowchart of a network access method based on the cloud storage system in Fig. 1 according to an embodiment of the present invention.

Detailed ways

The cloud storage system based on the network egress device and the network access method proposed by the present invention are described as follows in conjunction with the accompanying drawings and embodiments.

The core idea of the present invention is to make the local area network export device become a local super node (super node) and cloud storage node of the P2P network by combining the export device with P2P technology, and a plurality of super node groups of different local area networks are connected through P2P, and Always online to form a distributed cloud storage system with a stable structure. The P2P terminal in the LAN establishes a connection with the super node in the LAN, and the super node merges and acts as a proxy for the download request of the user terminal in the LAN, and the local super node acts as a cloud storage node Interact with the cloud system to finally obtain the content needed by the end user, so as to achieve the purpose of improving download speed and stability and controlling redundant traffic.

The "super node" in the present invention refers to an export device with always-online capability and large storage space, capable of merging download requests from LAN users for the same external network resource, and acting as an agent for LAN users to perform external network P2P downloading. The export device also serves as a local cloud storage node, and forms a P2P cloud storage system with a stable structure with other LAN export devices with the same capabilities.

As shown in Figure 1, it is a logical structure diagram of the cloud storage system of the present invention, which only shows a cloud storage system composed of three local area networks, and the network egress devices of campus network A, campus network B and campus network C in the figure are They are respectively set as Super Node A, Super Node B and Super Node C. Each Super Node is connected through the Internet and is always online to form a cloud storage system. The Super Node is also a cloud storage node in the system. Several user terminals on the campus network. Wherein, the connection between the supernodes and the connection between the supernode and the user terminal in the campus network to which it belongs are preferably P2P connections. Different from the traditional P2P network where the terminal user directly establishes a P2P connection with the host on the external network, in the embodiment of the present invention, the user terminal only establishes a P2P connection with the supernode and the user terminal of the local campus, and the supernode can merge and act as an agent for all terminal users of the local campus network external P2P access requests, thus greatly reducing redundant traffic caused by repeated downloads of the same external network resources at the network egress; at the same time, super nodes of multiple campus networks are always online as cloud storage nodes, forming a P2P network with a stable structure The network storage cloud avoids the structural instability caused by frequent offline and offline of traditional P2P network nodes. The egress device serving as a supernode and P2P cloud storage node in the local area network is a network device with a flow control function, such as a flow control device or a server with this function.

The network access method of the cloud storage system of the above-mentioned embodiment, as shown in Figure 2, comprises the following steps:

Step S101 , the user terminal in the local area network requests network resources through network query. In FIG. 1 , terminal user Alice in campus network A joins the P2P network and wishes to download file X.

Step S102, if the requested network resource does not exist in the local area network, the user terminal requests network resources outside the local area network through the super node. Specifically include: there is no file X in campus network A, Alice establishes a P2P connection with local supernode A, and requests supernode A to download file X as an agent; supernode A establishes P2P connections with other supernodes and file sources in the Internet, and downloads file X, At the same time, the downloaded file X is saved locally; Alice downloads file X from supernode A according to the traditional P2P method until the download is complete. If supernode A downloads file X and finds that the local storage space is not enough to accommodate file X, supernode A will clean up the storage space according to traditional methods such as LRU to make enough space for file X.

Step S103, if the requested network resource exists in the local area network, then the user terminal establishes a P2P connection with the super node in the local area network containing the network resource and other user terminals in the local area network containing the network resource, and downloads the Internet resources. In Figure 1, Bob, another terminal user located in the campus network A, joins the P2P network and hopes to download file X; through network query, Alice and supernode A in the campus network have file X, so Bob establishes P2P with Alice and supernode A Connection; Bob downloads file X from Alice and supernode A according to the traditional P2P method until the download is complete.

Step S104, if there is only a part of the requested network resources in the local area network, in Figure 1, if the supernode A has not yet completed the proxy request for Alice's file X at this time, that is, the complete file X does not exist in the campus network A, Then Bob downloads part of the network resources existing in Alice according to step S103, and at the same time requests supernode A to download other parts of file X as an agent. At this time, supernode A will merge the download requests of Alice and Bob for file X into one external request, and continue to download X from other supernodes and file sources outside the LAN, that is, download the rest of file X in the manner of step S102 , until the download is complete.

In the above embodiments, if "file X" is replaced with "network video program source X", the present invention is also applicable to IPTV live broadcast and on-demand scenarios.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (9)

1. A kind of cloud storage system, it is characterized in that, comprises: some local area network exit equipments as supernode, is connected by Internet between described each exit equipment, and is online all the time, and connects some user terminals in its local area network. 2. The cloud storage system according to claim 1, characterized in that, the connection between the export devices is P2P. 3. The cloud storage system according to claim 1, wherein the connection between the egress device and the user terminal in its local area network is a P2P connection. 4. The cloud storage system according to any one of claims 1-3, wherein the network egress device is a network device with a flow control function. 5. A network access method based on the cloud storage system of claim 1, comprising the steps of: S101: A user terminal in the local area network requests network resources through a network query; S102: If there is no network resource to be requested in the local area network, the user terminal requests the network resource outside the local area network through a super node in the local area network; S103: If the requested network resource exists in the local area network, the user terminal establishes a P2P connection with a super node containing the network resource in the local area network and other user terminals containing the network resource, and downloads the network resource; S104: If only a part of the requested network resource exists in the local area network, download the part of the network resource that does not exist in the local area network according to step S102, and download the part of the network resource that exists in the local area network according to step S103. 6. The network access method according to claim 5, characterized in that the step S102 specifically comprises: S1021: The user terminal establishes a P2P connection with the supernode in the local area network, and requests the supernode in the local area network to download the network resource as an agent; S1022: The supernode in the local area network establishes a P2P connection with other supernodes or sources of network resources in the Internet, downloads the network resources, and saves the downloaded network resources locally; S1023: The user terminal downloads the network resource from the super node in the local area network. 7. The network access method according to claim 6, wherein, in step S1021, if multiple users in the local area network request the supernode agent to download the same network resource outside the local area network, the supernode will merge these requests into one external download request. 8. The network access method according to claim 6, wherein when the supernode in the local area network downloads the network resource, if the local storage space is insufficient, the storage space is cleared to accommodate the network resource. 9. The network access method according to any one of claims 5-8, wherein the network resources include: files and network video resources.

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