WO2012034414A1

WO2012034414A1 - Method and system for processing peer to peer (p2p) services

Info

Publication number: WO2012034414A1
Application number: PCT/CN2011/074707
Authority: WO
Inventors: 杨波
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-19
Filing date: 2011-05-26
Publication date: 2012-03-22
Also published as: CN101938524A

Abstract

A method and system for processing peer to peer (P2P) services are provided by the present invention. The method includes: if a Deep Packet Inspection (DPI) equipment detects that a user equipment initiates a P2P service request, and then the P2P server request is redirected to a control center (10); if the control center finds the resources requested by the P2P service request in the cache equipment, an address of the cache equipment where the resources are located is sent to the user equipment (20). The invention not only ensures the download rate, but also reduces the load of download and upload for other peer nodes.

Description

Method and system for processing P2P service

Technical field

The present invention relates to the field of computer network communication technologies, and in particular, to a method and system for processing peer to peer (P2P) services.

Background technique

Today, fast-growing P2P (peer-to-peer) network traffic has a very large impact on the network. P2P download technology has changed the traditional modest network operation mode, and each download point can occupy the network bandwidth as much as possible. In P2P applications, the most part of the network bandwidth is the download service. Since the P2P software is developed by the CP (content provider), the CP does not consider or know the network. This directly causes the P2P software to not consider the network when downloading. The downloading point is randomly selected for topology, bandwidth, and congestion, and a large number of invalid links are established, which greatly increases the network burden and causes network congestion.

According to the latest statistics, P2P traffic currently accounts for more than half of the entire Internet (Internet) network traffic, and there is still a trend of continued growth. For operators, the speed of network expansion is far from meeting the explosive P2P network traffic. growth of. The normal situation is that when the network is just expanded, the bandwidth of the capacity is filled with P2P traffic. In the case of the carrier's customers, the P2P traffic also seriously affects the normal network service. The user feels that the network service rate is reduced. Decline, and then there will be a large number of phenomenon of network transfer, resulting in the loss of operators.

Summary of the invention

It is an object of the present invention to provide a method and system for processing P2P services to reduce download and upload load for Peer points and reduce network congestion.

In order to solve the above technical problem, the present invention provides a method for processing a peer to peer (P2P) service, including:

If the device detects that the user equipment initiates a P2P service request, the P2P service request is redirected to the control center; If the control center searches for the resource requested by the P2P service request, the control center sends the address of the cache device where the resource is located to the user equipment.

The method further includes: if the control center does not search for the resource requested by the P2P service request in the cache device, forwarding the P2P service request to the P2P server.

The above methods also include:

After the P2P service request is forwarded to the P2P server, the control center intercepts the service requested by the P2P server for the P2P service, and instructs the cache device to download the location according to the destination address of the resource indicated by the P2P server. Describe the resources requested by the P2P service request.

The above methods also include:

The cache device caches the resources requested by the P2P service request by: sorting the cached resources in an order of the number of downloads in a predetermined period of time;

If it is determined that the available storage space is less than the predetermined value, the resource requested by the P2P service request is replaced with the last resource.

The step of the control center sending the address of the cache device where the resource requested by the P2P service request is located to the user equipment includes:

Determining, by the control center, a P2P protocol used by the P2P service request;

Constructing a reply message according to the P2P protocol, and placing a download address of the resource requested by the P2P service request into the reply message;

Sending the reply message to the user equipment.

In order to solve the above problems, the present invention further provides a system for processing peer-to-peer (P2P) services, including: an in-depth packet detecting device, a control center, and a cache device.

The deep packet detecting device is configured to: after detecting that the user equipment initiates a P2P service request, redirect the P2P service request to the control center;

The control center is configured to: if the resource requested by the P2P service request is searched in the cache device, send the address of the cache device where the resource is located to the user equipment;

The cache device is configured to store resources.

The control center is further configured to: if the P2P service request is not found in the cache device The requested resource forwards the P2P service request to the P2P server.

The control center is further configured to: after forwarding the P2P service request to the P2P server, listening to the service requested by the P2P server for the P2P service, and sending a download instruction to the cache device, carrying the P2P server indication The destination address of the requested resource of the P2P service request;

The cache device is further configured to: after receiving the download instruction, download the resource requested by the P2P service request according to the destination address indicated by the P2P server.

The cache device is further configured to cache the resources requested by the P2P service request by: sorting the cached resources in an order of the number of downloads in a predetermined period of time; and, if determining that the available storage space is smaller than The predetermined value is used to replace the resource requested by the P2P service request with the last resource.

The control center is configured to send the download address of the resource requested by the P2P service request to the user equipment by: determining a P2P protocol used by the P2P service request, and constructing a reply message according to the P2P protocol And sending the download address of the resource requested by the P2P service request into the reply message, and sending the reply message to the user equipment.

In summary, the method and system for processing P2P services provided by the present invention not only ensure download speed, but also reduce download and upload load for other Peer points. BRIEF abstract

1 is a schematic diagram of a system for processing a P2P service according to an embodiment of the present invention;

2 is a schematic diagram of an application scenario of a system for processing a P2P service according to the present invention;

3 is a flowchart of a method for processing a P2P service according to the present invention;

4 is a flow chart of a method for processing a P2P service according to an embodiment of the present invention. Preferred embodiment of the invention

Based on the current technology, operators urgently need to solve the problem of traffic congestion. For P2P applications, a new detection technology, Deep Packet Inspection (DPI), has emerged recently. Traditional IP 4 流量 traffic identification technology, IP 4 艮 stream The quantity identification technology only identifies the quintuple of IP packets. Based on the analysis of the packet header, the DPI technology adds analysis of the application layer information, which is an application layer-based technology. In the present invention, DPI technology is used to optimize P2P traffic in the network to avoid network congestion.

For a better understanding of the invention, the invention will be further described in conjunction with the drawings and specific embodiments.

1 is a schematic diagram of a system for processing a P2P service according to an embodiment of the present invention. As shown in FIG. 1, the system of the present embodiment includes: a DPI device, a control center, and a cache device, where

The DPI device is configured to: if detecting that the user equipment initiates a P2P service request, redirecting the P2P service request to the control center;

The control center is configured to: if the resource requested by the P2P service request is searched in the cache device, send the address (ie, the download address) of the cache device where the resource is located to the user. Specifically, the control center determines a P2P protocol used by the P2P service request, constructs a reply message according to the P2P protocol, and puts a download address of the file resource into a download list of the reply message, and the reply is sent. Sending a message to the user;

The cache device is configured to store resources.

The control center is further configured to: if the file resource requested by the P2P service request is not found in the cache device, forward the P2P service request to the P2P server, and listen to the P2P server for the P2P service And the downloading instruction is sent to the cache device, and the destination address indicated by the P2P server is downloaded;

The cache device is further configured to: after receiving the downloading instruction, download the resource requested by the P2P service according to the destination address of the resource indicated by the P2P server, and cache the resource requested by the P2P service.

Because the storage space of the cache device is limited, it is impossible to store all the downloaded resources, and the stored resources need to be traded off. In this embodiment, the cache replacement principle may be to sort the download resources according to the number of downloads, and the number of times the resources are downloaded is increased. Then the ranking is increased. When the downloading traffic is not downloaded within a set period of time (ie, the sorting is last), and the available storage space is less than the predetermined value, the downloaded content is deleted, and the new downloading resource is replaced. 2 is a schematic diagram of an application scenario of a system for processing a P2P service according to the present invention. In practical applications, network operators need to deploy DPI devices in their own networks and key parts. At the same time, cache devices (cache devices) are deployed to store files to be downloaded. At the same time, the control management center is established to complete the search and replacement of cached content. Construct a download list, etc., as shown in Figure 2.

Among them, the main function of the DPI device in the system is to identify P2P service information, when the user starts

For P2P applications, when requesting a download list from a P2P server, the DPI device must redirect the request originally sent to the P2P server to the control center. The control center searches for the file resource stored in the cache device according to the content of the requested service. If the download resource is saved in the cache, the control center constructs a response message to the requesting user according to the specific P2P application (such as BT, Thunder, etc.). Specifically, a response message is constructed according to the corresponding message format, and the download address is added to the message payload (such as a download list).

The user downloads directly from the cache device according to this download list. Since the network bandwidth of the cache device is guaranteed to be extended when the operator deploys, the best download speed can be guaranteed, while reducing the download or upload load for other Peer points. If the control center does not search for the downloaded download resource in the cache, the request is forwarded to the P2P server, and the service is instructed to download the P2P service according to the destination address indicated by the P2P server. The requested resource, and the requested resource is cached to provide the same resource request service to other users. When other users request the resource, they can download it through the cached data.

Since the storage space of the cache is limited, it is impossible to store all the download resources. This requires a cache replacement technique. The principle of cache replacement may be to rank the downloaded resources according to the number of downloads. The ranking increases. When there is no download traffic for a set period of time, the download is deleted and the new download resource is replaced.

Through the above method, the operator can reduce the out-of-order traffic of P2P and then alleviate the network congestion caused thereby.

3 is a flow chart of a method for processing a P2P service according to the present invention. As shown in FIG. 3, the following steps are included: Step 10: If the DPI device detects that the user equipment initiates a P2P service request, the DPI device redirects the P2P service request to the control center.

Step 20: If the control center searches for the resource requested by the P2P service request, the control center sends the address of the cache device where the resource is located to the user equipment.

In this way, the user can download the resources directly from the cache device, which not only ensures the download speed, but also reduces the download and upload load for other Peer points.

FIG. 4 is a flowchart of a method for processing a P2P service according to an embodiment of the present invention. As shown in FIG. 4, the following steps may be included:

Step 1: The operator deploys the DPI device at a key location, and the DPI device monitors the P2P application in real time. Step 2: The DPI device redirects the P2P service request to the control center when the P2P client initiates a P2P service request to the P2P server.

Step 3: The control center analyzes the request information of the P2P user, determines the P2P protocol used (for example, BT, eDonkey, Thunder, etc.), obtains the requested file information, and counts the number of downloads of the file.

Step 4: The control center searches for the requested resource in the deployed cache. If the corresponding resource is found, go to step 5. If the corresponding resource is not found, go to step 7.

Step 5: If the control center finds the corresponding resource, it constructs a reply corresponding to the P2P protocol, and puts the download address of the resource in the cache into the download list, so that the user can download the requested resource from the cache.

Step 6: The cache device also ranks the number of downloads of the resources in the cache, updates and replaces the last ranked resources in the cache, and ensures the optimal use efficiency of the cache.

When the number of times the resource is downloaded increases, the ranking increases. When the traffic is not downloaded within a set period of time, and the available storage space in the cache device is less than the predetermined value, the last ranked resource is deleted and replaced with the new download resource.

Step 7: If the control center does not search for the requested resource in the cache device, the control information is sent to the P2P server and its service is monitored. Step 8: The control center instructs the cache device to download the requested resource to request service for the same resource of other users.

When the cache device has no requested download resources, the user can directly download from the destination address indicated by the original P2P server, and the cache also downloads a copy from the destination address indicated by the P2P server, and then the user can download from the cache.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above is only a preferred embodiment of the present invention, and of course, the present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. Corresponding changes and modifications are intended to be included within the scope of the appended claims.

Industrial applicability

Compared with the prior art, the method and system for processing P2P services provided by the present invention not only can guarantee the download speed, but also can reduce the downloading and uploading load for other Peer points.

Claims

Claim

1. A method of processing a peer to peer (P2P) service, comprising:

If the deep packet detecting device detects that the user equipment initiates a P2P service request, the deep packet detecting device redirects the P2P service request to the control center;

If the control center searches for the resource requested by the P2P service request in the cache device, the control device sends the address of the cache device where the resource is located to the user device.

2. The method of claim 1 further comprising:

If the control center does not search for the resource requested by the P2P service request in the cache device, the control center forwards the P2P service request to the P2P server.

3. The method of claim 2, further comprising:

4. The method of claim 3, further comprising:

The method according to any one of claims 1-4, wherein the step of the control center transmitting the address of the cache device where the resource requested by the P2P service request is located to the user equipment comprises: determining, by the control center The P2P protocol used by the P2P service request;

Sending the reply message to the user equipment.

A system for processing a peer-to-peer (P2P) service, comprising: an in-depth packet detecting device, a control center, and a cache device, wherein

The deep packet detecting device is configured to: after detecting that the user equipment initiates a P2P service request, Redirecting the P2P service request to the control center;

The cache device is configured to store resources.

7. The system of claim 6 wherein

The control center is further configured to forward the P2P service request to the P2P server if the resource requested by the P2P service request is not found in the cache device.

8. The system of claim 7, wherein

9. The system of claim 8 wherein

10. The system of any of claims 6-9, wherein