CN101997889B - Method, system and device for optimizing P2P transmission in WLAN - Google Patents

Abstract

The embodiment of the present invention discloses a method for optimizing P2P transmission in a WLAN network. Send to the corresponding subordinate P2P client; The AP receives the download request of the P2P client that needs to download the data, and obtains the ID of the downloaded content fragment and the address of the P2P client that needs to download the data; The ID extracts the downloaded content fragments in the cache, and sends them to the P2P client that needs to download the data. In the embodiment of the present invention, the content transmission of the interaction between the P2P terminal and the AP can be greatly reduced, and air interface resources can be saved.

Description

Method, system and device for optimizing P2P transmission in WLAN network

technical field

The embodiments of the present invention relate to the field of communication technologies, and in particular to a method, system and device for optimizing P2P transmission in a WLAN network.

Background technique

P2P (Peer to Peer, peer-to-peer) technology is currently the most popular data transmission technology on the Internet. In this technology, the nodes are completely equal, and data can be transmitted between nodes without going through the server. At present, 80% of the traffic on the Internet is P2P traffic.

There is a large amount of P2P traffic in the Internet, and in the mobile Internet, there will be more and more nodes connected through a WLAN (Wireless Local Area Network, wireless local area network). Each node in the wireless network realizes data transmission through the AP (Access Point, access point). The wireless network includes multiple APs, and each AP has one or more nodes under it. Different nodes under the same AP can transmit data through the AP. Data, nodes under different APs can transmit data through their respective APs. As shown in Figure 1, AP1, AP2, AP3 and AP4 are connected through a wireless LAN, AP1 is subordinate to node 1, node 2 and node 3, AP2 is subordinate to node 4 and node 5, AP3 is subordinate to no node, and AP4 is subordinate to node 6 and node 7. When node 1 transmits data to node 2, node 1 first transmits the data to AP1 through the air interface, and then AP1 transmits the data to node 2 through the air interface; when node 1 transmits data to node 4, node 1 first transmits the data to The data is transmitted to AP1 through the air interface, and then transmitted to AP2 by AP1 through the wireless LAN, and then AP2 transmits the data to node 4 through the air interface.

It can be seen that no matter nodes under the same AP or nodes under different APs must occupy air interface resources when transmitting data, the P2P traffic generated by these nodes will consume a large amount of bandwidth resources of the air interface. Therefore, the current wide application of P2P makes the originally smooth network become more and more congested, and the throughput of the network also drops sharply.

Contents of the invention

Embodiments of the present invention provide a method, system and device for optimizing P2P transmission in a WLAN network. By adding buffers in APs, a large number of air interface transmissions are reduced.

The embodiment of the present invention provides a method for optimizing P2P transmission in a WLAN network, which is applied to a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs, and the method includes the following steps:

The AP allocates a cache for each subordinate P2P client, stores the download data downloaded to the subordinate P2P client into the cache, and sends it to the corresponding subordinate P2P client;

The AP receives a download request from a P2P client that needs to download data, and obtains the segment ID of the downloaded content and the address of the P2P client that needs to download data;

The AP extracts the downloaded content fragments from the cache according to the downloaded content fragment IDs, and sends them to the P2P client that needs to download data.

The P2P client address for obtaining the downloaded content ID and the data to be downloaded specifically includes;

The AP sends the download request of the P2P client that needs to download data to the subordinate P2P client;

The AP receives an upload message from a subordinate P2P client with source data, and the upload message carries the segment ID of the downloaded content and the address of the P2P client to download the data.

Before receiving the upload message of the subordinate P2P client with the source data, it also includes:

The subordinate P2P client receives the download request, and the download request carries the P2P client address of the data to be downloaded and the content of the data to be uploaded;

The subordinate P2P client checks whether the content of the data to be uploaded is in the local cache, and if so, carries the ID of the content of the data to be uploaded and the address of the P2P client of the data to be downloaded in the upload message, and sends it to the AP .

Also includes:

The content of the data to be uploaded is not in the local cache, and the data to be uploaded is acquired from the local hard disk, and is carried in an upload message with the P2P client address of the data to be downloaded, and sent to the AP.

Said storing the download data downloaded to the subordinate P2P client into the cache, specifically includes:

Store each download content segment ID and download content in the cache.

The sending to the corresponding subordinate P2P client also includes:

The P2P client stores the download data in a local cache, and records the corresponding download content segment ID.

Also includes:

Transferring the downloaded content in the local cache to the hard disk after the preset time.

The P2P client address for obtaining the download content ID and the data to be downloaded specifically includes:

The AP parses the download request to obtain the P2P client address of the data to be downloaded and the segment ID of the content to be downloaded.

The embodiment of the present invention also provides a system for optimizing P2P transmission in a WLAN network, including at least two P2P clients, the P2P clients belong to the same AP or different APs,

The AP is used to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client in the cache, and send it to the corresponding subordinate P2P client; when receiving the P2P client that needs to download data send the download request of the P2P client that needs to download data to the subordinate P2P client; receive the upload message of the subordinate P2P client with the source data, and the upload message carries the download content ID and the P2P client that needs to download the data Address; according to the download content ID, extract the download content fragments in the cache, and send them to the P2P client that needs to download the data.

The P2P client is used to receive the download request of the P2P client that needs to download the data forwarded by the AP, carry the download content ID and the address of the P2P client that needs to download the data in the upload message, and send it to the AP.

The embodiment of the present invention also provides an AP, which is applied in a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs, and the AP includes:

A cache module, configured to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client;

The download request receiving module is used to send the download request of the P2P client that needs to download data to the subordinate P2P client when receiving the download request of the P2P client that needs to download data;

An information acquisition module, connected to the download request receiving module, for receiving an upload message from a subordinate P2P client with source data, the upload message carrying the download content ID and the address of the P2P client to download the data;

The data transmission module is connected with the information acquisition module and the cache module, and is used to extract the download content fragments from the cache module according to the download content ID, and send them to the P2P client that needs to download the data.

The cache module is specifically configured to store each download content segment ID and download content in the cache.

The embodiment of the present invention also provides a system for optimizing P2P transmission in a WLAN network, including at least two P2P clients, the P2P clients belong to the same AP or different APs,

The AP is used for the AP to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client; when receiving the data to be downloaded The download request of the P2P client, analyze the download request, obtain the P2P client address of the data to be downloaded, and the ID of the content segment to be downloaded; extract the download content segment in the cache according to the download content ID, and send it to the A P2P client that needs to download data.

The embodiment of the present invention also provides an AP, which is applied in a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs, and the AP includes:

A cache module, configured to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client;

The download request receiving module is used to receive a download request from a P2P client that needs to download data;

Parsing module, connected with the download request receiving module, used to parse the download request, obtain the P2P client address of the data to be downloaded, and the fragment ID of the content to be downloaded; extract the download content fragment in the cache according to the download content ID slices, and sent to the required number of downloads;

The data transmission module is connected with the parsing module and the cache module, and is used to extract the download content fragments from the cache module according to the download content ID, and send them to the P2P client that needs to download the data.

Compared with the prior art, the embodiment of the present invention has the following advantages:

In the embodiment of the present invention, the AP allocates a buffer for each subordinate P2P client, stores the download data downloaded to the subordinate P2P client in the buffer, and when receiving a download request from a P2P client that needs to download data, according to the download request The download content segment ID in the cache extracts the download content segment and sends it to the P2P client that needs to download the data. Therefore, it can greatly reduce the content transmission of the interaction between the P2P terminal and the AP, and save air interface resources.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of a network structure in which a P2P terminal transmits data through an AP in the prior art;

FIG. 2 is a flowchart of a method for optimizing P2P transmission in a WLAN network in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a system for optimizing P2P transmission in a WLAN network according to an embodiment of the present invention;

FIG. 4 is a structural diagram of a P2P client in an embodiment of the present invention;

FIG. 5 is a structural diagram of an AP in an embodiment of the present invention;

Fig. 6 is another AP structure diagram in the embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

An embodiment of the present invention provides a method for optimizing P2P transmission in a WLAN network, which is applied to a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs. The method is shown in FIG. 2 , including the following steps:

Step 201, the AP allocates a cache for each subordinate P2P client, stores each download content fragment ID and download content downloaded to the subordinate P2P client into the cache, and sends them to the corresponding subordinate P2P client, The P2P client stores the download data in a local cache, and records the corresponding download content fragment ID. In addition, in order to save cache space, the download content in the local cache is transferred to in the hard disk.

A cache is set in each AP, and each P2P client also has a cache locally. Assuming that the cache size reserved by P2P clients is N, and the maximum number of P2P clients that can be accommodated under each AP is M, then the cache size on the AP is set to M*N.

When a P2P client downloads, the P2P downloaded content first passes through the AP connected to the P2P client, and when the P2P client shares the downloaded content with other P2P clients, it also passes through the AP connected to the P2P client. Therefore, a cache area is opened for each accessing P2P client on each AP, the size is N, and the latest downloaded content is cached; a cache area is also reserved on the P2P client, and the downloaded content from the AP The content is cached. The cache capacity on the P2P client is less than or equal to the cache capacity on the AP, so as to ensure that the cached content on the P2P client is a subset of the cached content on the AP. Of course, in order to save cache space, caches on the AP and the P2P client can be refreshed periodically.

In step 202, the AP receives a download request from a P2P client that needs to download data, and obtains the segment ID of the downloaded content and the address of the P2P client that needs to download data.

Among them, according to the function of the AP, it can be divided into two situations:

1. In order to avoid major changes to the AP, when the AP does not have the function of analyzing the download request to obtain the fragment ID of the downloaded content, the AP only obtains the P2P client address where the source data is located through the download request, and forwards the download request to the P2P client.

It specifically includes: the AP sends the download request of the P2P client that needs to download data to the subordinate P2P client; the subordinate P2P client finds whether the content of the data to be uploaded is in the local cache, and if so, uploads the content of the data to be uploaded The ID and the address of the P2P client to download the data are carried in the upload message and sent to the AP. The content of the data to be uploaded is not in the local cache, and the data to be uploaded is acquired from the local hard disk, and is carried in an upload message with the P2P client address of the data to be downloaded, and sent to the AP.

The AP receives an upload message from a subordinate P2P client with source data, and the upload message carries the segment ID of the downloaded content and the address of the P2P client to download the data.

2. In order to further reduce the air interface transmission content between the AP and the P2P client, the AP has the function of analyzing the download request to obtain the fragment ID of the download content, and the AP directly sends the cached download content to the P2P client who needs to download the data end, reducing the air interface interaction with the P2P client where the source data resides.

Specifically, the AP parses the download request, obtains the P2P client address of the data to be downloaded, and the segment ID of the content to be downloaded.

Step 203, the AP extracts the download content fragment from the cache according to the download content fragment ID, and sends it to the P2P client that needs to download the data.

An embodiment of the present invention provides a system for optimizing P2P transmission in a WLAN network, including at least two P2P clients, and the P2P clients belong to the same AP or different APs, as shown in FIG. 3 ,

The AP is used to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client in the cache, and send it to the corresponding subordinate P2P client; when receiving the P2P client that needs to download data send the download request of the P2P client that needs to download data to the subordinate P2P client; receive the upload message of the subordinate P2P client with the source data, and the upload message carries the download content ID and the P2P client that needs to download the data Address; according to the download content ID, extract the download content fragments in the cache, and send them to the P2P client that needs to download the data.

The P2P client is used to receive the download request of the P2P client that needs to download the data forwarded by the AP, carry the download content ID and the address of the P2P client that needs to download the data in the upload message, and send it to the AP.

An embodiment of the present invention provides a P2P client, which is applied to a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs. As shown in Figure 4, the P2P client includes :

A receiving module 410, configured to receive a download request from a P2P client that needs to download data forwarded by the AP;

The parsing module 420 is connected with the receiving module 410, and is used to parse out the download content ID and the P2P client address of the data to be downloaded from the download request;

The upload module 430 is connected with the parsing module 420, and is used for carrying the download content ID and the P2P client address of the data to be downloaded in the upload message and sending it to the AP.

The parsing module 420 is specifically used to find out whether the data content to be uploaded is in the local cache, and if so, carry the ID of the data content to be uploaded and the P2P client address of the data to be downloaded in the upload message, and send it to the AP; the content of the data to be uploaded is not in the local cache, and the data to be uploaded is obtained from the local hard disk, and the address of the P2P client that needs to download the data is carried in the upload message, and sent to the AP.

The download module 440 is connected with the parsing module 420, and is used for storing the download data in the local cache, and recording the corresponding download content segment ID; and when the preset time is exceeded, transferring the download content in the local cache to the hard disk.

An embodiment of the present invention provides an AP, which is applied to a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs. As shown in FIG. 5, the AP includes:

The cache module 510 is configured to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client;

The download request receiving module 520 is used to send the download request of the P2P client that needs to download data to the subordinate P2P client when receiving the download request of the P2P client that needs to download data;

The information acquisition module 530 is connected with the download request receiving module 520, and is used for receiving an upload message of a subordinate P2P client with source data, the upload message carrying the download content ID and the address of the P2P client to download the data;

The data transmission module 540 is connected with the information acquisition module 530 and the cache module 510, and is used to extract the download content fragments from the cache module according to the download content ID, and send them to the P2P client that needs to download the data.

The caching module 510 is specifically configured to store each downloaded content segment ID and downloaded content in the cache.

An embodiment of the present invention provides a system for optimizing P2P transmission in a WLAN network, including at least two P2P clients, the P2P clients belong to the same AP or different APs,

The AP is used for the AP to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client; when receiving the data to be downloaded The download request of the P2P client, analyze the download request, obtain the P2P client address of the data to be downloaded, and the ID of the content segment to be downloaded; extract the download content segment in the cache according to the download content ID, and send it to the A P2P client that needs to download data.

An embodiment of the present invention provides an AP, which is applied to a wireless network including at least two P2P clients, and the P2P clients belong to the same AP or different APs. As shown in FIG. 6, the AP includes:

The cache module 610 is configured to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client;

The download request receiving module 620 is used for receiving the download request of the P2P client that needs to download data;

The parsing module 630 is connected with the download request receiving module 620, and is used to parse the download request, obtain the P2P client address of the data to be downloaded, and the fragment ID of the content to be downloaded; extract the download content fragment in the cache according to the download content ID. slices, and sent to the required number of downloads;

The data transmission module 640 is connected with the parsing module 630 and the cache module 610, and is used for extracting the download content fragments from the cache module according to the download content ID, and sending them to the P2P client that needs to download the data.

In the embodiment of the present invention, the AP allocates a buffer for each subordinate P2P client, stores the download data downloaded to the subordinate P2P client in the buffer, and when receiving a download request from a P2P client that needs to download data, according to the download request The download content segment ID in the cache extracts the download content segment and sends it to the P2P client that needs to download the data. Therefore, it can greatly reduce the content transmission of the interaction between the P2P terminal and the AP, and save air interface resources.

Through the above description of the implementation manners, those skilled in the art can clearly understand that the embodiments of the present invention can be implemented by hardware, or by means of software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), Several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the modules or processes in the drawing are not necessarily necessary for implementing the embodiment of the present invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, and can also be changed and located in one or more devices different from the device in the embodiment. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

The above disclosures are only a few specific embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any changes conceivable by those skilled in the art should fall within the scope of protection of the embodiments of the present invention.

Claims (8)

1. A method for optimizing P2P transmission in a WLAN network, applied to a wireless network comprising at least two P2P clients, said P2P clients belonging to the same AP or different APs, characterized in that said method comprises the following steps: The AP allocates a cache for each subordinate P2P client, stores the download data downloaded to the subordinate P2P client into the cache, and sends it to the corresponding subordinate P2P client; The AP receives the download request of the P2P client that needs to download data, and the AP sends the download request of the P2P client that needs to download data to the subordinate P2P client; The AP receives an upload message from a subordinate P2P client with source data, and the upload message carries the segment ID of the download content and the address of the P2P client to download the data; The AP extracts the download content fragment in the cache according to the download content fragment ID, and sends it to the P2P client that needs to download the data; Wherein, the content cached on the P2P client is a subset of the cached content on the AP, the caches on the AP and the P2P client are refreshed regularly, and the received data from the subordinate P2P client with source data Before uploading the message, also include: The subordinate P2P client receives the download request, and the download request carries the P2P client address of the data to be downloaded and the content of the data to be uploaded; The subordinate P2P client checks whether the content of the data to be uploaded is in the local cache, and if so, carries the ID of the content of the data to be uploaded and the address of the P2P client of the data to be downloaded in the upload message, and sends it to the AP . 2. The method of claim 1, further comprising: The content of the data to be uploaded is not in the local cache, and the data to be uploaded is acquired from the local hard disk, and is carried in an upload message with the P2P client address of the data to be downloaded, and sent to the AP. 3. The method according to claim 1, wherein the storing the download data downloaded to the subordinate P2P client into the cache specifically comprises: Store each download content segment ID and download content in the cache. 4. The method according to claim 1, wherein the sending to a corresponding subordinate P2P client further comprises: The P2P client stores the download data in a local cache, and records the corresponding download content segment ID. 5. The method of claim 4, further comprising: After the preset time, the P2P client transfers the downloaded content in the local cache to the hard disk. 6. The method according to claim 1, wherein obtaining the ID of the downloaded content fragment and the address of the P2P client to download the data specifically includes: The AP parses the download request to obtain the P2P client address of the data to be downloaded and the segment ID of the content to be downloaded. 7. A system for optimizing P2P transmission in a WLAN network, comprising at least two P2P clients, the P2P clients belonging to the same AP or different APs, characterized in that, The AP is used for the AP to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client; when receiving the data to be downloaded The download request of the P2P client of the P2P client, analyze the download request, the AP sends the download request of the P2P client that needs to download data to the subordinate P2P client; the AP receives the upload message of the subordinate P2P client with the source data, so The upload message carries the download content fragment ID and the address of the P2P client that needs to download the data; extracts the download content fragment in the cache according to the download content fragment ID, and sends it to the P2P client that needs to download the data; Wherein, the content cached on the P2P client is a subset of the cached content on the AP, and the caches on the AP and the P2P client are refreshed regularly, and before receiving the upload message from the subordinate P2P client with source data, Also includes: The subordinate P2P client receives the download request, and the download request carries the P2P client address of the data to be downloaded and the content of the data to be uploaded; The subordinate P2P client checks whether the content of the data to be uploaded is in the local cache, and if so, carries the ID of the content of the data to be uploaded and the address of the P2P client of the data to be downloaded in the upload message, and sends it to the AP . 8. An AP, applied in a wireless network comprising at least two P2P clients, the P2P clients belonging to the same AP or different APs, characterized in that the APs include: A cache module, configured to allocate a cache for each subordinate P2P client, store the download data downloaded to the subordinate P2P client into the cache, and send it to the corresponding subordinate P2P client; The download request receiving module is used to receive a download request from a P2P client that needs to download data; The analysis module is connected with the download request receiving module, and is used to analyze the download request, and sends the download request of the P2P client that needs to download data to the subordinate P2P client; receiving the upload message of the subordinate P2P client with source data, The upload message carries the download content fragment ID and the P2P client address of the data to be downloaded; extracts the download content fragment in the cache according to the download content fragment ID, and sends it to the number to be downloaded; The data transmission module is connected with the analysis module and the cache module, and is used to extract the download content fragment in the cache module according to the download content fragment ID, and send it to the P2P client that needs to download the data; Wherein, the content cached on the P2P client is a subset of the cached content on the AP, and the caches on the AP and the P2P client are refreshed regularly, and before receiving the upload message from the subordinate P2P client with source data, Also includes: The subordinate P2P client receives the download request, and the download request carries the P2P client address of the data to be downloaded and the content of the data to be uploaded; The subordinate P2P client checks whether the content of the data to be uploaded is in the local cache, and if so, carries the ID of the content of the data to be uploaded and the address of the P2P client of the data to be downloaded in the upload message, and sends it to the AP .