Method for realizing switching from multicast to unicast in wireless environment
An implementation method and technology of wireless environment, applied in broadcast service distribution, digital transmission system, electrical components, etc., can solve the problems of wireless channel congestion and data security cannot be guaranteed, to simplify processing logic and ensure security and effectiveness Effect
Active Publication Date: 2014-06-11
FUJIAN SUNNADA NETWORK TECH CO LTD
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Problems solved by technology
[0008] The technical problem solved by the present invention is to provide a method for implementing multicast to unicast in a wireless environment, which can solve the technical problem of wireless channel congestion and data security cannot be guaranteed in the prior art
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[0025] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0026] see figure 1 and figure 2 , the present invention provides a method for implementing multicast to unicast in a wireless environment, wherein this embodiment includes:
[0027] AP refers to the wireless switch used in the wireless network, and is also the core of the wireless network. The wireless AP is the access point for mobile computer users to enter the wired network. It is mainly used in broadband homes, buildings and parks, and the coverage distance is tens of meters. to hundreds of meters.
[0028] AC refers to the wireless controller, which is a device responsible for managing and controlling APs and terminal stations. In actual use, the AP coverage of the wireless LAN is wired, so it is usually necessary to distribute m...
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The invention provides a method for realizing switching from multicast to unicast in a wireless environment. The method comprises the following steps: 1, an AP (Access Point) message forwarding module directly forwards an IGMP (Internet Group Management Protocol) protocol message to an AP multicast protocol message processing module, and the AP multicast protocol message processing module directly forwards the IGMP protocol message to an AC multicast forwarding table module; 2, the AC multicast forwarding table module judges whether the IGMP protocol message is processed for a first time, if so, the AC multicast forwarding table module converts the received IGMP protocol message into an AC forwarding table and forwards to an AC multicast message encapsulating module for performing message encapsulating, and the AC multicast message encapsulating module transmits a forwarding table encapsulating message to the AC multicast message encapsulating module; otherwise, the protocol message is not processed; and 3, the AC multicast message processing module forwards the encapsulating message to an AC multicast forwarding table processing module to form an AP multicast forwarding table; and 4, performing data stream transmission according to the AC forwarding table and the AP multicast forwarding table. Due to the adoption of the scheme, the broadband resource of a wireless local area network is utilized effectively, and only effective multicast streams are forwarded.
Description
technical field [0001] The invention relates to a method for converting multicast to unicast, in particular to a method for realizing multicast to unicast in a wireless environment. Background technique [0002] At present, the number of wireless users is increasing day by day, but the wireless / wired bandwidth resources are quite limited. In order to effectively solve the problem of single-point transmission and multi-point reception, the multicast technology is applied to the network on a large scale, which saves bandwidth and effectively avoids channel possibility of congestion. However, if there are a large number of users on a wireless port such as Figure 3-1 As shown in AP1, but only one user is the receiver of some data, the traditional multicast technology will send the data to all users under the wireless port, occupying limited wireless resources invisibly, and may cause wireless channel congestion; At the same time, for 802.11 networks, multicast stream forwardin...
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IPC IPC(8): H04W4/06H04L29/12H04L12/70H04L45/16
Inventor 林煜
Owner FUJIAN SUNNADA NETWORK TECH CO LTD