CN102546316B - Head-end equipment of Ethernet over coax - Google Patents

Abstract

The invention relates to the head-end equipment of the Ethernet over coax. The equipment comprises an Ethernet over coax module and an Ethernet interface unit, which are connected with each other, wherein the Ethernet over coax module comprises a radio frequency input end and a radio frequency output end. The head-end equipment of the Ethernet over coax comprises the Ethernet over coax module and the Ethernet interface unit, which are connected with each other, and the Ethernet over coax module comprises the radio frequency input end and the radio frequency output end, so that the head-end equipment of the Ethernet over coax has a simple structure, and is low in cost and high in extensibility; and a network management unit can be conveniently added to realize a network management function.

Description

The headend of coaxial cable Ethernet

Technical field

The present invention relates to network equipment field, particularly network head end apparatus field, specifically refers to a kind of headend of coaxial cable Ethernet.

Background technology

The TV signal pattern of China just progressively shifts to digital signal from analog signal, and cable TV network is from monotropic transformation to two-way, thereby realizes the transformation from the simple function of network to triple play, the integration of three networks.The demand in market and the development of New Television Technology need cable TV network to realize the Double-Direction User access of the whole network.And Double-Direction User access technology in the past, as CMTS+Cable modem and FTTB+LAN technology can not adapt to the needs of unexpectedly striving of Double-Direction User access market and the two-way integrated service development of cable TV network.Therefore, Bidirectional Access Technologies based on coaxial cable---EOC (Ethernet OverCoax, coaxial cable loads Ethernet) technology be tending towards ripe, for the Double-Direction User access of cable TV network the whole network and the benign development of two-way integrated service have brought new opportunity.

EOC technology combines IP data and cable TV signal exactly, with same cable access, sends into user.Neither affect the transmission of cable TV signal, have again the two-way broad band Integrated service access exclusively enjoying, there is good adaptability and networking access scheme flexibly.Simultaneously, it is without original cable TV network is carried out to bidirectional construction transformation, or carry out the engineering that large-scale category-5 cable is applied to family, overcome and in cable TV network bilateral network transformation process, registered one's residence that construction is more difficult, the whole network covers the problems that cost is high and the improvement project cycle is long.Although the cutting point of various EOC technology researchs and technical method are slightly different, all can be applicable to cable TV network field, by coaxial cable transmission of data signals.

At present the shortcoming of the comparatively common headend that is applied to EOC technology is, its function relies on master chip to realize completely, therefore cannot meet the application of the more complicated such as network management, and autgmentability is not strong.Also have part headend to realize Network Management Function by adding the method for special chip, or promote the scalability of headend, but the common structure of these headends is comparatively complicated, and cost is higher.Thus applying of EOC technology brought to adverse effect.

Summary of the invention

The object of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of simple in structure, with low cost, autgmentability is strong, and can realize the headend of the coaxial cable Ethernet of Network Management Function.

In order to realize above-mentioned object, the headend of coaxial cable Ethernet of the present invention has following formation:

It comprises interconnective coaxial cable ethernet module and Ethernet interface unit, and described coaxial cable ethernet module comprises rf inputs and radio-frequency (RF) output end.

In the headend of this coaxial cable Ethernet, described coaxial cable ethernet module comprises master chip unit, rf filtering unit, signal coupling unit and signal transmitting and receiving unit, described rf filtering unit sequentially connects described Ethernet interface unit by described signal coupling unit, signal transmitting and receiving unit, master chip unit, and described rf filtering unit comprises described rf inputs and radio-frequency (RF) output end.

In the headend of this coaxial cable Ethernet, described coaxial cable ethernet module also comprises master chip dynamic storage cell and master chip flash cell, and described master chip dynamic storage cell is all connected described master chip unit with master chip flash cell.

In the headend of this coaxial cable Ethernet, described coaxial cable ethernet module also comprises transmitting-receiving gain control unit, between the signal transmitting and receiving unit described in described transmitting-receiving gain control unit is connected in and described master chip unit.

In the headend of this coaxial cable Ethernet, described master chip unit is the network adapter chip that is built-in with protocol layer unit and physical layer element.

In the headend of this coaxial cable Ethernet, described Ethernet interface unit comprises Ethernet conversion chip and Ethernet interface, and described Ethernet interface all connects the master chip unit of described coaxial cable ethernet module by described Ethernet conversion chip.

In the headend of this coaxial cable Ethernet, described headend also comprises network management unit, and described network management unit connects described Ethernet interface unit.

In the headend of this coaxial cable Ethernet, described network management unit comprises network service microprocessor and control and management subelement, and described network service microprocessor connects respectively described control and management subelement and Ethernet interface unit.

In the headend of this coaxial cable Ethernet, described headend also comprises network service microprocessor dynamic storage cell and network service microprocessor flash cell, and described network service microprocessor dynamic storage cell is all connected described network service microprocessor with network service microprocessor flash cell.

In the headend of this coaxial cable Ethernet, described headend comprises two coaxial cable ethernet modules, and two described coaxial cable ethernet modules all connect described Ethernet interface unit and network management unit.

Adopted the headend of the coaxial cable Ethernet of this invention, because it comprises interconnective coaxial cable ethernet module and Ethernet interface unit, described coaxial cable ethernet module comprises rf inputs and radio-frequency (RF) output end, thereby make headend simple in structure of this coaxial cable Ethernet, cost is relatively cheap, and have good autgmentability, complementary network administrative unit easily, to realize Network Management Function.

Accompanying drawing explanation

Fig. 1 is the structural representation of the headend of coaxial cable Ethernet of the present invention.

Fig. 2 has the structural representation of the preferred implementation of two coaxial cable ethernet modules in the headend of coaxial cable Ethernet of the present invention.

Embodiment

In order more clearly to understand technology contents of the present invention, especially exemplified by following examples, describe in detail.

Referring to shown in Fig. 1, is the structural representation of a kind of execution mode of the headend of coaxial cable Ethernet of the present invention.

In this embodiment, the headend of described coaxial cable Ethernet, comprises interconnective coaxial cable ethernet module and Ethernet interface unit, and described coaxial cable ethernet module comprises rf inputs and radio-frequency (RF) output end.Wherein, described coaxial cable ethernet module comprises master chip unit, rf filtering unit, signal coupling unit and signal transmitting and receiving unit, described rf filtering unit sequentially connects described Ethernet interface unit by described signal coupling unit, signal transmitting and receiving unit, master chip unit, and described rf filtering unit comprises described rf inputs and radio-frequency (RF) output end.Described coaxial cable ethernet module also comprises transmitting-receiving gain control unit, master chip dynamic storage cell and master chip flash cell, between signal transmitting and receiving unit described in described transmitting-receiving gain control unit is connected in and described master chip unit, described master chip dynamic storage cell is all connected described master chip unit with master chip flash cell.Described master chip unit is the network adapter chip that is built-in with protocol layer unit and physical layer element.Described Ethernet interface unit comprises Ethernet conversion chip and Ethernet interface, and described Ethernet interface all connects the master chip unit of described coaxial cable ethernet module by described Ethernet conversion chip.

Of the present invention a kind of preferred embodiment in, described headend also comprises network management unit, described network management unit connects described Ethernet interface unit.This network management unit comprises network service microprocessor and control and management subelement, and described network service microprocessor connects respectively described control and management subelement and Ethernet interface unit.Described network management unit also comprises network service microprocessor dynamic storage cell and network service microprocessor flash cell, and described network service microprocessor dynamic storage cell is all connected described network service microprocessor with network service microprocessor flash cell.

In a kind of preferred execution mode of the present invention, as shown in Figure 2, described headend comprises two coaxial cable ethernet modules, and two described coaxial cable ethernet modules all connect described Ethernet interface unit and network management unit.

In an application of the invention, this coaxial cable Ethernet head end equipment data transmission method comprises the following steps:

(1) rf inputs of the rf filtering unit of described coaxial cable ethernet module receives analog signal;

(2) described rf filtering unit is sent to described master chip unit by described signal coupling unit and signal transmitting and receiving unit successively by described analog signal;

(3) described master chip unit is converted to digital signal by described analog signal;

(4) described master chip unit is sent to Ethernet interface unit by described digital signal.

Adopted the headend of the coaxial cable Ethernet of this invention, because it comprises interconnective coaxial cable ethernet module and Ethernet interface unit, described coaxial cable ethernet module comprises rf inputs and radio-frequency (RF) output end, thereby make headend simple in structure of this coaxial cable Ethernet, cost is relatively cheap, and have good autgmentability, complementary network administrative unit easily, to realize Network Management Function.

In this specification, the present invention is described with reference to its specific embodiment.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.

Claims (7)

1. a headend for coaxial cable Ethernet, is characterized in that, described headend comprises interconnective coaxial cable ethernet module and Ethernet interface unit, and described coaxial cable ethernet module comprises rf inputs and radio-frequency (RF) output end; Described coaxial cable ethernet module comprises master chip unit, rf filtering unit, signal coupling unit and signal transmitting and receiving unit, described rf filtering unit sequentially connects described Ethernet interface unit by described signal coupling unit, signal transmitting and receiving unit, master chip unit, and described rf filtering unit comprises described rf inputs and radio-frequency (RF) output end; Described coaxial cable ethernet module also comprises transmitting-receiving gain control unit, between the signal transmitting and receiving unit described in described transmitting-receiving gain control unit is connected in and described master chip unit; Described headend also comprises network management unit, and described network management unit connects described Ethernet interface unit.

2. the headend of coaxial cable Ethernet according to claim 1, it is characterized in that, described coaxial cable ethernet module also comprises master chip dynamic storage cell and master chip flash cell, and described master chip dynamic storage cell is all connected described master chip unit with master chip flash cell.

3. the headend of coaxial cable Ethernet according to claim 1, is characterized in that, described master chip unit is the network adapter chip that is built-in with protocol layer unit and physical layer element.

4. the headend of coaxial cable Ethernet according to claim 1, it is characterized in that, described Ethernet interface unit comprises Ethernet conversion chip and Ethernet interface, and described Ethernet interface all connects the master chip unit of described coaxial cable ethernet module by described Ethernet conversion chip.

5. the headend of coaxial cable Ethernet according to claim 1, it is characterized in that, described network management unit comprises network service microprocessor and control and management subelement, and described network service microprocessor connects respectively described control and management subelement and Ethernet interface unit.

6. the headend of coaxial cable Ethernet according to claim 5, it is characterized in that, described headend also comprises network service microprocessor dynamic storage cell and network service microprocessor flash cell, and described network service microprocessor dynamic storage cell is all connected described network service microprocessor with network service microprocessor flash cell.

7. the headend of coaxial cable Ethernet according to claim 1, it is characterized in that, described headend comprises two coaxial cable ethernet modules, and two described coaxial cable ethernet modules all connect described Ethernet interface unit and network management unit.