A point-to-point low frequency modulation eoc device

Abstract

The invention provides a point-to-point low frequency modulation Ethernet over coax (EOC) device which comprises an OLT and a subscriber terminal device connected with the OLT. Both the OLT and the subscriber terminal device comprise modulation-demodulation modules, the modulation-demodulation modules modulate a base band ethernet data signal to be in band width of 5-65MHz or modulates the modulated ethernet data signal to be the base band ethernet data signal, the modulated ethernet data signal is mixed with a cable television signal to be output through a coaxial cable, and multi-business transmission and global management and control can be simultaneously achieved. The point-to-point low frequency EOC device is used for simultaneously connecting the network data signal and the cable television signal through a coaxial cable, achieves point-to-point single signal channel modulation of the network data signal, and achieves the functions of cable television network broad band internet and television watching.

Description

technical field [0001] The invention relates to a data transmission device for co-cable transmission of an Ethernet signal and a cable television signal by using an HFC network, in particular to a point-to-point low-frequency modulation EOC device. Background technique [0002] EOC (Ethernet over Coax) technology is a technology that transmits Ethernet data through coaxial cables. With the continuous advancement of the country's "three-network integration" and the two-way transformation of the radio and television network, and the rapid development of communication technology and radio and television technology, the cable television network is transitioning to the next generation broadcast and television network (NGB). Cable access technology (EOC), as one of the key technologies of NGB, has been developed and applied rapidly in recent years. However, how to provide users with EOC equipment with high bandwidth, low cost, easy popularization, easy construction and maintenanc...

AI Technical Summary

Problems solved by technology

[0004] 1) The problem of noise aggregation: due to the noise aggregation problem caused by the point-to-multipoint scheme (that is, the output port of a central office equipment with multiple user terminals), the equipment will Poor stability, prone to packet loss and disconnection

[0005] 2) The problem that the user bandwidth cannot be guaranteed when multiple users access: when the number of end users increases, the data transmission efficiency of the equipment decreases, the user bandwidth cannot be guaranteed, and the bandwidth decreases and the delay increases.

[0006] 3) The problem of limited QoS function of the device and the problem of difficulty in maintenance: due to the difference in QoS management function with traditional Ethernet switches, the manageability and maintainability of the device are not high, and it is difficult to realize the problem of switching devices with traditional Ethernet No differentiation of maintenance, special maintenance is required

[0007] 4) The problem of high cost: due to the expensive chips used, it is difficult to reduce the cost of equipment

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