Broadband access equipment and uses thereof

Abstract

The invention provides a digital subscriber line access multiplexer and application thereof. The core of the digital subscriber line access multiplexer comprises: arranging a video service unit in the digital subscriber line access multiplexer, and the inner-arranged video service unit transmitting the stored video service to a subscriber terminal through the digital subscriber line access multiplexer where the video service unit is according to the request of the subscriber terminal. The invention reduces the bandwidth requirement of the video service to the access network and convergence network, and solves efficiently the bottleneck problem of bandwidth of a backbone network and the convergence network; the invention does not have influence on design principles that the current bandwidth access network and the convergence network do not realize exchange for video services, simplifies resource management mechanism for entire access network and the convergence network and complexity for managing the resources of the access network, thereby enhancing utilization rate of the network bandwidth, reducing complexity for managing the network resources and eliminating bottleneck of the video server.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a broadband access device and its application. Background technique [0002] With the popularization of various broadband access technologies such as DSL (Digital Subscriber Loop) based on twisted pair, optical fiber and wireless access, operators expect to carry out more services in the network, among which Video (video) Businesses such as video broadcasting and VoD (video on demand) are a focus. [0003] Video services mainly rely on the two basic transmission modes of multicast and unicast, and some complex applications need to be realized by mixing and alternating unicast and multicast. The bearer network needs to provide reliable video stream distribution and corresponding QoS guarantees according to video service requirements. [0004] The current network architecture for providing video services based on broadband access networks is shown in the attached f...

AI Technical Summary

Problems solved by technology

[0010] Question 1. With the increase of video users and video services, the problem of network bandwidth consumption

[0011] Problem 2. The bit error rate of access technologies such as DSL access technology and WiMAX access technology leads to the degradation of video quality

[0013] For problem 2, the existing solutions are mainly: rely on the retransmission mechanism of the application layer, that is, for unicast video streams, when the mobile terminal detects that the packet is lost, it sends an application to the source to request retransmission, but for multicast There is no retransmission mechanism for the business

[0014] The distributed video server is placed on the service provider point, although it can ensure that only the terminal that has passed the network authentication can access the video server, so that the network bandwidth between the access network and the service provider point is completely controllable, but the service provider point is in the When managing the network resources between it and the access network, it is necessary to dynamically perceive the video stream of the video server, which complicates the management of network resources at the service provider point. Moreover, with the increase of broadband access network users and the demand for video services The rapid expansion of the network, the bandwidth bottleneck between the service provider point and the access network is becoming more and more prominent

[0015] For multicast traffic, since multicast itself does not define a retransmission mechanism, it is impossible to retransmit for a certain multicast node, which will damage the video quality. The server is deployed at the aggregation layer or a higher layer, and the retransmitted packets of the unicast video stream need to consume the network bandwidth between the access network and the aggregation layer, or even higher layers.

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