Unlock instant, AI-driven research and patent intelligence for your innovation.

Communications networks

一种网络、通信系统的技术，应用在无连接通信网络领域，能够解决巨额开销、成本增大、降低使用IP优势等问题

Active Publication Date: 2012-01-11
BRITISH TELECOMM PLC
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] All of these solutions bring huge overhead and associated complications, requiring changes to configured routers or protocols, moving issues out of the IP layer (thus reducing the benefits of using IP), or costly when traffic increases. increase
In case the packet is encrypted, the old deep packet inspection method will fail

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Communications networks
  • Communications networks
  • Communications networks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] First we continue to focus on a prior art solution, sometimes referred to as the IETFIntServ system, which is a circuit simulation solution. Unlike the usual principle that packets should flow through any number of different routes, this scheme establishes a special path for the flow of packets. refer to Figure 4 , each router already on data path 1 must reserve a specific bandwidth for that flow. Signaling flow specifications in the network by using the RSVP protocol requires each router to run specific software (requiring that routers must be modified) and build many queues, which require additional processing and router memory. This scheme is difficult to manage in large networks, and if any one router runs out of bandwidth, reservation attempts will fail.

[0026] A complex system of bandwidth coordination is required, and the delay in establishing the reservation can be long, causing problems such as post-dial delays for VoIP calling users. Serious problems als...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In order to keep a pathway for time critical data packets (for example for VoIP calls) a dummy flow of data packets is established between a home hub router (20) and a broadband remote access server (25) being the first gateway to the IP network. Should a call be made from the telephone (23), the dummy flow is replaced for the duration of the call by the packets generated for the VoIP call. The dummy flow is adjusted by increasing or decreasing the number of data packets transmitted in order to ensure that a minimum bandwidth having a tolerable delay is available. The dummy flow works by causing non time critical (i.e. P2P data packet flows) to back off and no modification is required to routers and the like incorporated into the network.

Description

technical field [0001] The present invention relates to connectionless communication networks, and more particularly to such networks in which bandwidth is shared among users. Background technique [0002] One of the most important issues affecting users of Internet Protocol networks (IP packet networks) is the lack of guaranteed quality of service (QoS), eg when making VoIP calls, packet delays can lead to poor call quality. [0003] A further difficulty is that file sharing can cause delays at the start of a VoIP call because the end-to-end file sharing network will use all available bandwidth to try to speed up file transfers, even though they may be relatively low priority. [0004] So network congestion is a significant difficulty especially for two-way VoIP or video calls, since they have only a useful time window of about 300 milliseconds (voice) and cannot retransmit delayed or lost packets. Therefore, when the use of the backbone or mobile backbone network increase...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/54H04L12/56H04L12/26H04L47/724H04L47/80
CPCH04L47/822H04L12/5695H04L47/19H04L47/724H04L47/745H04L47/15H04L45/00H04L47/801H04L47/70H04L61/4535
Inventor 大卫·罗杰·维斯利罗里·斯图尔特·特恩布尔理查德·格德格
Owner BRITISH TELECOMM PLC