Method and device for releasing transfer control protocol resources

Abstract

The invention provides a method and a device for releasing transfer control protocol (TCP) resources. The method comprises the steps as follows: after three times of handshake connection between a band net gate (BNG) and user equipment (UE), the BNG sends a detection message to the UE; the BNG acquires the receiving status of the response message from the UE, wherein the response message is the response message of the detection message; and the BNG releases the TCP resources occupied by the UE according to the acquired receiving status. By adopting the technical scheme provided by the invention, the technical problem that the WEB identification of a normal user is affected because a technical scheme for affectively releasing the TCP resources is unavailable in a relative technique is solved, so that limited TCP resources is effectively utilized, and the normal user can normally carry out WEB identification.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for releasing a Transmission Control Protocol (Transfer Control Protocol, TCP for short) resource. Background technique [0002] WEB authentication is widely used in current wireless local area network (Wireless Local Area Network, WLAN for short) broadband access. Such as figure 1 As shown, the main working process of WEB authentication is as follows: [0003] Users accessing the Internet through the WLAN access the Broadband Network Gateway (Band Net Gate, BNG) through the Access Node (AN for short), and first obtain an IPv4 address from the BNG. At this time, the user has not been authenticated and has no access to the Internet. [0004] When a user needs to use Internet services, the user accesses any Internet web page through the Hypertext Transfer Protocol (HTTP for short), and BNG intercepts the user's HTTP connection and redirects the page accessed ...

AI Technical Summary

Problems solved by technology

The cause of this abnormal connection may be malicious attacks by users, or network failures that prevent users’ HTTP packets from being sent to BNG

[0014] After the TCP full connection is established, that is, after the BNG and the UE establish a TCP connection, under normal circumstances, after the BNG redirects the user's HTTP request, the user will end the TCP connection through the TCP FIN, and the BNG will release the TCP resource, but it does not The protection of TCP resources when the HTTP connection is abnormal after the TCP connection has been established will have the following situations: (1) The user device may not send an HTTP request after the TCP connection is established and will not actively terminate the TCP connection. At this time, the BNG will still maintain TCP connection, until the TCP connection times out, obviously, at this time will also occupy the limited number of TCP connections of BNG, and then affect the normal TCP-based WEB authentication business

(2) When BNG uses WEB services, the user visits any web page after obtaining the address. After BNG and the user's TCP three-way handshake succeed, the user does not send an HTTP message, which causes the resources requested by the server before the three-way handshake cannot be released in time, and a large number of users simultaneously During WEB authentication, the server resources will be fully occupied, which will affect the WEB authentication of normal users.

[0015] For the above-mentioned problems in related technologies, no effective solution has been proposed yet

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