An apparatus and method for implementing data dynamic alignment bandwidth in transmission equipment

Abstract

The invention is a device and method of realizing dynamic data bandwidth adjustment in transmission device, adding a control channel in relay link of the transmission device to describe the time gap occupying condition of the current service. The control channel completes dynamic time gap allocation on PCM line under the control of CPU. The device includes: control word processing circuit to complete extracting and inserting control information in control information in E1 link; time gap allocating circuit to complete separating voice time gap from Ethernet data time gap and recombining Ethernet data; high order data link control / media access control (HDLC / MAC) processing circuit to complete HDLC link processing, MAC frame integrity checking and MAC address comparing and learning of the Ethernet data; CPU interface circuit to realize time gap allocation control. The invention can dynamically adjust Ethernet data bandwidth and fully uses relay bandwidth resources.

Description

technical field [0001] The invention relates to the field of Ethernet communication, in particular to a device and a method for realizing dynamic bandwidth adjustment of data in a transmission device. Background technique [0002] As a traditional concept, Pulse Code Modulation (PCM) refers to multiplexing multiple voice services to E1 / T1 through PCM coding. With the expansion of applications, especially people's demand for data services, the support of PCM equipment for services has been greatly enhanced. Today, the concept of pulse code modulation PCM is no longer limited to voice multiplexing, but can be Voice, data, image and other services are multiplexed to E1 / T1 based on time slots, such as figure 1 shown. As for the multiplexing of data service and image service, it is realized through V.35 interface at first, and the device simply maps V.35 channel to E1 / T1 time slot. When the V.35 interface implements data service applications, an external protocol converter or ...

AI Technical Summary

Problems solved by technology

However, for pulse code modulation PCM equipment, the bandwidth of the service is generally configured statically, and the bandwidth of the data service is realized through the fixed allocation of time slots. Even when the voice service is idle, the data service cannot occupy the idle time. If the number of time slots for data services is reconfigured by software by detecting idle time slots, it will bring problems with the connection with the peer device and data service errors or even service interruptions caused by bandwidth changes

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