CN203151533U - MoCA head terminal having multiple VLAN modes - Google Patents

Abstract

The utility model discloses an MoCA head terminal having multiple VLAN modes. The MoCA head terminal having multiple VLAN modes comprises an MoCA main chip, a CPU and a PHY chip, the CPU and the PHY chip are connected through an MII to realize forwarding of data, the MoCA chip and the CPU are connected through a PCI, an inner core operating in the CPU uses PCI drive to access and control the MoCA main chip to realize forwarding of data, and a sk_buff structure body in the PCI drive is used to transmit a data package. The head terminal has a VLAN processing function, is suitable for a single-port terminal network, a manageable multi-port terminal network or a network mixing a single-port and a manageable multi-port terminal on a broadcast and television network at present, solves the problem that multiple MoCA terminals of different times coexist in the same network, and satisfies multi-service application requirements of broadcast and television users.

Description

MoCA head end with multiple VLAN pattern

Technical field

The utility model belongs to network service and broadcasting television technology field, relate to a kind of MoCA (Multimedia overCoax Alliance, multimedia over Coax Alliance) head end, particularly a kind of MoCA head end as the multiple VLAN pattern of having of access device.

Background technology

The MoCA technology is as a kind of broadband network access technology, utilize existing coaxial cable to realize access and the network transmission of two-forty, high reliability, and need not to do any adjustment, compare xDSL, Ethernet etc. and have advantage, used by increasing radio and TV operator, along with the propelling of the integration of three networks, increasing radio and TV operator will begin to increase interactive VOD business such as IPTV, IPCAM gradually from originally single business of networking only is provided.

VLAN (Virtual Local Area Network, VLAN) be a kind of with lan device from being divided into the network segment one by one in logic, thereby realize the emerging Data Interchange Technology of virtual work group.802.1Q be the VLAN standard that IEEE promulgates, it makes Frame also can keep vlan information when crossing over distinct device by VLAN ID is encapsulated in the Frame.The network equipment of different manufacturers is as long as support 802.1Q, and VLAN just can cross over the different network equipments, realizes unified the division and management.

Telecommunications, radio and TV operator utilize this advantage of VLAN that different business is stamped different VLAN labels mostly at present, and 802.1P priority bit in the use VLAN field, be CoS (Class of Service, service type/the grade of service of Ethernet), make different business have different priority, (Quality of Service is network service quality to have higher QoS in whole transmission course, it is a kind of security mechanism of network, with a kind of technology that solves problems such as network delay and obstruction) guarantee, to reach best transmission performance.And present MoCA system, real is another technology of MoCA, namely c.LINK-Access is to develop a kind of technology of coming from the MoCA home network technologies.For the single port terminal, it is not supported in and stamps the VLAN label in the packet, peeling off of supported vlans label not yet; For the multiport terminal, it is the complete transparent transmission of supported vlans packet not, therefore can not satisfy radio and TV operator's demand.

The utility model content

In order to overcome the deficiencies in the prior art, the utility model provides a kind of MoCA head end with multiple VLAN pattern, makes it be applicable to various terminals on the CHINA RFTCOM Co Ltd.

To achieve these goals, MoCA head end with multiple VLAN pattern of the present utility model comprises the MoCA master chip, CPU and PHY chip, wherein CPU and PHY chip are by MII (Medium Independent Interface, Media Independent Interface, the Ethernet industry standard of IEEE-802.3 definition, comprise the management interface between a data interface and MAC and the PHY) be connected and realize the forwarding of data, adopt pci interface to connect between MoCA master chip and the CPU, the kernel that moves among the CPU adopts PCI to drive the forwarding that access control MoCA master chip is realized data, use the sk_buff structure Data transmission bag in the PCI driving, under the MAC pattern, the PCI drive part of c.LINK driver is handled the up-downgoing packet, and send to the vlan information table of c.LINK in driving according to user application and analyze, the VLAN ID that the MAC Address of the subscriber equipment in the up-downgoing packet that judgement is received is shone upon in the vlan information table, the operation of the removal of being correlated with and interpolation VLAN.

MoCA head end with multiple VLAN pattern of the present utility model, have based on MAC Address, terminal prot, terminal and multiple VLAN pattern such as use with, expand to the MAC Address based on terminal, the MAC Address of subscriber equipment (as computer, set-top box etc.) and the VLAN binding pattern of MAC Address section (binding of MAC section) again.Can pass through the relevant parameter of way to manage Remote configuration VLAN patterns such as telnet, web, SNMP, make whole M oCA head end have the VLAN processing capacity, be applicable to single port terminal network on the present CHINA RFTCOM Co Ltd, can manage the multiport terminal network, or single port and can manage the network that the multiport terminal is used with, solve the multiple MoCA terminal of different times and be stored in the problem of consolidated network, satisfied the multiple services utilization demand of radio and television users.

Description of drawings

Accompanying drawing 1 is the hardware block diagram with MoCA head end of multiple VLAN pattern of the present utility model;

Accompanying drawing 2 is downlink data packet process charts of the utility model MoCA head end;

Accompanying drawing 3 is upstream data bag process charts of the utility model MoCA head end.

Embodiment

Below in conjunction with embodiment and accompanying drawing the MoCA head end with multiple VLAN pattern of the present utility model is described in detail; thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that protection range of the present utility model is made more explicit defining.

As shown in Figure 1, CPU is connected by MII with the PHY chip and realizes the forwarding of data, adopt pci interface to connect between MoCA master chip and the CPU, the kernel that moves among the CPU adopts PCI to drive the forwarding that access control MoCA master chip is realized data, use the sk_buff structure Data transmission bag in the PCI driving, sk_buff is the structure that Linux transmits in its protocol stack, the inside has comprised the head of each layer protocol, such as ethernet, ip, tcp, udp etc. have also comprised simultaneously information such as source address in the Ethernet data bag and destination address.

Based on the VLAN pattern of MAC, it is the mode that a kind of MAC Address according to terminal or subscriber equipment is come the MoCA head end VLAN that configured port can not manage.When this pattern is set, only need the mapping relations of configuration MAC Address and VLAN id number, the database that these data are stored in upper layer application and bottom layer driving is in the vlan information table, when packet is transmitted, in the vlan information table, search corresponding mac address information, find out relevant VLAN ID then and handle.This pattern had both been supported the identical VLAN of each terminal configuration under the MoCA head end, can support to dispose different VLAN again, and support the MAC Address of a plurality of subscriber equipmenies under MoCA terminal of configuration, realize that a plurality of equipment are divided into different VLAN, thereby support multiple services the development.In the time of in only a corresponding terminal MAC Address being added into vlan table, all subscriber equipmenies all carry out data according to this VLAN ID and transmit under this terminal; As the MAC that has both disposed terminal, when having disposed the MAC of subscriber equipment again, the MAC of subscriber equipment has high priority.In addition, the MAC mode expansion goes out to support the configuration feature based on the MAC Address section, (MAC Address preceding 3) the configuration VLAN that can directly adopt the producer of MAC Address to indicate, except the MAC of MAC section and independent configuration in addition, other equipment can be automatically classified into a VLAN group the inside, have avoided in practice based on terminal MAC or the loaded down with trivial details configuration of equipment MAC.

Based on the VLAN pattern of terminal prot, realize the forwarding of all packets having comprised the packet that has VLAN tag that VLAN peels off with being added on the MoCA head-end switch chip and realizes that this kind pattern is supported the manageable MoCA terminal of port at the MoCA head end.

The VLAN pattern of MAC Address and port hybrid is the pattern of compatible above-mentioned two kinds of VLAN modes simultaneously, and he had both supported the terminal that port such as common single port can not be managed, and supported the manageable terminal of port again.When terminal MAC or subscriber equipment MAC be added into the vlan information table, being applicable to that port such as single port can not be managed with the manageable multiport terminal of port mixed the network that uses.

Under the MAC pattern, at the PCI of c.LINK driver drive part the up-downgoing packet is handled, and send to the vlan information table of c.LINK in driving according to user application and analyze, the VLAN ID that the MAC Address of the subscriber equipment in the upstream or downstream packet that judgement is received is shone upon in the vlan information table, the operation of the removal of being correlated with and interpolation VLAN.

As shown in Figure 2, for downlink data packet, c.LINK drives and receives that the handling process behind the packet is as follows:

1, judged whether VLAN, if directly do not transmit;

If 2 have VLAN, judge which kind of pattern is the VLAN pattern of configuration be;

If 3 is port mode, do not do the processing about VLAN, directly transmit;

If 4 is MAC pattern or MAC binding pattern, the VLAN field in the deletion packet is transmitted data again;

If 5 is mixed mode, the processing data packets flow process is as follows:

(1) obtains the target MAC (Media Access Control) address of packet and the MAC Address of the MoCA terminal of transmitting this packet;

(2) judge that the MAC Address of purpose MAC or MoCA terminal is whether in the vlan information table;

(3) if, the VLAN field of deletion in the packet transmitted data again;

(4) if in the vlan information table, do not have, but can assert that this packet is to mail to the port office terminal, in the MoCA head end, not be VLAN and handle directly forwarding.

As shown in Figure 3, for the upstream data bag, c.LINK drives and receives that the handling process behind the packet is as follows:

1, judges which kind of pattern is the VLAN pattern that disposes be;

If 2 is port mode, do not do the processing about VLAN, directly transmit;

If 3 is MAC pattern or mixed mode, handling process is as follows:

(1) obtains the source MAC of packet and the MAC Address of the MoCA terminal of transmitting this packet;

(2) in the vlan information table, search MAC Address, with the VLAN of corresponding VLAN ID as packet;

(3) in packet, add this VLAN ID and priority, transmit data again;

(4) if in the vlan information table, do not find relevant information, can assert that this subterminal equipment does not have interpolation to advance vlan table, does not process direct forwarding;

If 4 is the MAC binding pattern, the processing data packets flow process is as follows:

(1) obtains the source MAC of packet and the MAC Address of the MoCA terminal of transmitting this packet;

(2) in the vlan information table, find out the corresponding VLAN ID of MAC as the VLAN of packet;

(3) if find, by handling skb, add this VLAN ID and priority, transmit data again;

(4) if do not find, carry out in packet, adding VLAN with the default vlan ID except above-mentioned three kinds of MAC Address that disposes;

(5) if there is not allocating default VLAN, directly transmit data.

Above-described embodiment limits the utility model never in any form, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops in the protection range of the present utility model.

Claims (1)

1. MoCA head end with multiple VLAN patterns such as supporting MAC, terminal prot, it is characterized in that: comprise MoCA master chip, CPU and PHY chip, CPU is connected by MII with the PHY chip, adopts the pci interface connection between MoCA master chip and the CPU.

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