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Method and device for providing backup link

A technology of backup link and user equipment, applied in the field of data communication

Active Publication Date: 2019-08-27
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wireless link backup function on the CPE usually requires a dedicated wireless module (i.e., a USB dongle), which brings additional hardware costs to the CPE as well as development costs to implement the function

Method used

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  • Method and device for providing backup link
  • Method and device for providing backup link

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0068] Example 1 HTTP interception with spoofed DNS responses when WAN (gateway link to the Internet) connection is down.

[0069] A user opens an internet browser on a client device in the LAN and tries to access www.google.com (example).

[0070] A client device (such as mobile device 101) sends a DNS query for www.google.com to an NG (Not Good) gateway (a Not Good gateway means a gateway whose link to the Internet is down).

[0071] The gateway DNS server / forwarder cannot forward the request, so it returns a DNS response which will resolve www.google.com to a non-local IP address.

[0072] The browser sends the HTTP GET message through the default route on the client device (which is the NG gateway).

[0073] NG Gateway intercepts this request and handles it internally. An HTTP response is returned to the client device, which contains information about the cause of the intercepted request and / or directions for analyzing and resolving WAN connectivity issues.

example 2

[0074] Example 2 HTTP intercepts connections to WAN addresses when the WAN connection is down.

[0075] A user is using an internet browser on a client device in the LAN, accessing www.google.com (example) over the WAN connection on the NG Gateway. The DNS information for www.google.com is cached in the client device (ie IPv4: 173.194.46.20).

[0076] The WAN connection becomes unavailable for some reason (i.e. physical disconnect or loss of DSL sync).

[0077] The user initiates a new request to www.google.com, and the browser sends an HTTP GET message to the cache address through the NG gateway.

[0078] NG Gateway intercepts this request and handles it internally. An HTTP response is returned to the client device, which contains information about the cause of the intercepted request and / or directions for analyzing and resolving WAN connectivity issues.

[0079] In step 306, the processor 201 uses the WiFi transceiver of the gateway 104 to establish a tunnel with the mobi...

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PUM

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Abstract

It is provided a method for providing a communication backup link, wherein a user device has a first connection to a gateway and a second connection to Internet, and the gateway has a connection to Internet, wherein at gateway comprising detecting disruption of the connection to Internet (301); and establishing a tunnel between the gateway and the user device as the communication backup link to Internet (306).

Description

technical field [0001] The present disclosure relates to data communications, and more particularly, to methods and apparatus for providing backup links. Background technique [0002] A customer premises equipment (CPE) is a device located at the customer premises and capable of communicating with devices at the network operator's end. In most cases, CPE and network operator equipment are connected through a wired broadband network. Many operators require CPE to be able to perform wireless link backup in case of wired link failure. Wireless link backup enables end users to continue their Internet access and helps operators perform remote diagnostics over the wireless backup link. Remote diagnostics are critical to troubleshooting wired link failures. However, the wireless link backup function on the CPE usually requires a dedicated wireless module (ie, a USB dongle), which brings additional hardware costs and development costs to the CPE to realize the function. Content...

Claims

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Application Information

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IPC IPC(8): H04L12/703H04L45/28H04L45/24
CPCH04W40/02H04L45/22H04L45/28H04L12/2898H04L12/4633H04L12/66H04L49/555H04L49/557H04L67/02H04L67/563
Inventor 陈安
Owner INTERDIGITAL CE PATENT HLDG