A Gigabit Passive Optical Network System Multicast Service Distribution Device and Method
A passive optical network and multicast service technology, which is applied in the field of distribution devices for multicast services in gigabit passive optical network systems, and can solve problems such as broadcast storms, affecting normal services, and wasting network bandwidth.
Inactive Publication Date: 2016-06-22
WEIFANG UNIVERSITY +1
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[0005] Generally speaking, multicast refers to IP multicast, which is implemented on the third layer; in the EPON system, OLT and ONU are essentially regarded as Ethernet switches, and they all belong to the second-layer equipment. Packets are not differentiated, and the OLT directly broadcasts the multicast packets after receiving them (this phenomenon is called flooding), which not only wastes a lot of network bandwidth, causes broadcast storms, but also affects normal services
[0006] In the GPON system, when the multicast stream has been delivered to the OLT device, the OLT starts to send the first multicast stream to the PON port after receiving the first IGMP request message of the specific multicast group from the specific PON port. It takes a long time for group users to send multicast data packets, and the resource utilization of the device is low
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0033] figure 1 It shows the structural frame of the device for distributing the multicast service of the gigabit passive optical network system provided by the present invention. For the convenience of description, only the parts related to the present invention are shown in the figure.
[0034] The multicast service distribution device of the Gigabit passive optical network system is built in the optical line terminal (OLT) of the Gigabit passive optical network system (GPON). The device specifically includes a main module 11, a CLI command module 12, and a host module 13 and routing module 14, ...
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The present invention relates to the field of Ethernet passive optical network technology, and provides a device and method for distributing multicast services of a gigabit passive optical network system. The device is built in an OLT, which includes a main module, a CLI command module, and a host Module and routing module, the main module receives the multicast stream and request data packet input from the outside, parses the request data packet to obtain the request information, sends the request information to the message queue, and distributes it to the routing module or the host module for processing, the host module according to The request information establishes the corresponding relationship between the requesting host and the port, and the routing module establishes a multicast forwarding table, and forwards the multicast flow to the members in the multicast forwarding table. Through the mutual cooperation and cooperation of the above modules, the OLT shortens the time from receiving the first IGMP request message of a specific multicast group from a specific PON port to sending a multicast data message to the user, and improves equipment resources. utilization rate.
Description
technical field [0001] The invention belongs to the technical field of Ethernet passive optical network, and in particular relates to a multicast service distribution device and method of a gigabit passive optical network system. Background technique [0002] Gigabit-Capable Passive Optical Network (GPON) (hereinafter referred to as GPON) technology is a point-to-multipoint optical fiber access technology based on Ethernet technology. The combination of high efficiency and other characteristics of the network PON is the best way to realize the fiber-optic access network of fiber-to-the-home in the future. [0003] The GPON system consists of optical line terminal equipment (OpticalLineTerminal, OLT), user end (OpticalNetworkUnit, ONU), and optical distribution network (OpticalDistributionNetwork, ODN). Generally, the downlink adopts the broadcast mode, and the uplink adopts the TDMA (Time Division Multiple Access) mode. The so-called "passive" means that the ODN does not c...
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IPC IPC(8): H04Q11/00H04L12/761H04L45/16
Inventor 陈光军
Owner WEIFANG UNIVERSITY