Talkback and video data transmitting method based on wireless local area network, and talkback commutator

Abstract

The invention discloses a talkback and video data transmitting method based on a wireless local area network, and a talkback commutator, which are realized by adopting a plurality of wireless local area network user terminals, a plurality of wireless local area network wireless access stations, a wireless local area network switch and a talkback and video management server, can provide the characteristics of high connection speed, strong instantaneity, high voice quality, and absolute forced prior communication in priority level for talkback and video data transmission of the wireless local area network user terminals under the condition of keeping the prior functions of data access and transmission of the wireless local area network on the basis of an equipment network and external line transmission system provided by the existing wireless local area network equipment, and have functions of general calling, group calling and notification. Meanwhile, during needing, the communication connection between the wireless local area network user terminals and public telephone communication network users can be realized, so that demands on talkback and video data transmission of the wireless local area network user terminals are met.

Description

technical field [0001] The invention is an intercom and video data transmission method and an intercom adapter based on a wireless local area network, belonging to [0002] Wireless LAN technology field. Background technique [0003] The existing wireless local area network technology has a strong and flexible data access service function, so the wireless local area network is widely used. In order to meet the actual intercom business needs, the wireless intercom communication signal is also realized on the wireless local area network. Transmission function, in the intercom transmission system realized on the existing wireless local area network technology, the WIFI intercom system is more common. The transmission protocol adopted by the WIFI intercom system in the physical layer and the data link layer is IEEE802.11. The common transmission protocol in wired LAN transmission is IEEE802.3, and its common feature is to use carrier sense and collision detection to control the...

AI Technical Summary

Problems solved by technology

[0003] The existing wireless local area network technology has a strong and flexible data access service function, so the wireless local area network is widely used. In order to meet the actual intercom business needs, the wireless intercom communication signal is also realized on the wireless local area network. Transmission function, in the intercom transmission system realized on the existing wireless local area network technology, the WIFI intercom system is more common. The transmission protocol adopted by the WIFI intercom system in the physical layer and the data link layer is IEEE802.11. The common transmission protocol in wired LAN transmission is IEEE802.3, and its common feature is to use carrier sense and collision detection to control the transmission of information in the network. Both performance and voice quality cannot be compared with wireless private network intercom technology, and in terms of user priority applications, it cannot guarantee that high-priority intercom users have absolute priority over low-priority users in mandatory connection communications in terms of access and switching connections ; In practical applications, it is often necessary to build a wireless local area network to meet the requirements of various data access. In the existing wireless local area network environment, due to equipment installation and maintenance management, external line transmission system and investment conditions, it is not convenient to renew Construct a private network intercom transmission system, but in the actual production dispatching communication work, it is necessary to have fast communication connection speed, real-time performance and high voice quality, the priority level has absolute mandatory priority communication, and there are all call, group call and The function of the announcement requires the function of the private network intercom transmission system, and when necessary, realizes the communication connection between the private network intercom user and the public network telephone communication user, and the wireless intercom system realized on the existing wireless local area network technology It cannot meet the above-mentioned wireless private network intercom transmission requirements. For the existing wireless LAN network transmission, there are the following problems in summary:

[0004] 1. The authentication process for wireless LAN user terminals to access the wireless LAN is relatively long, which is not conducive to the rapid access of wireless LAN user terminals and fast switching when moving, resulting in a long connection interruption time;

[0005] 2. The wireless data access transmission of wireless local area network user terminals adopts the user competition mode, which causes excessive delay in wireless data access, and has no absolute priority and better reliability guarantee compared with the access of wireless local area network user terminals; Using the competition-free working mode, due to the polling method, when there are many wireless LAN user terminals at the same access point, the polling time will be longer, and the data transmission efficiency of the wireless LAN user terminals will decrease; although in the transmission process of data frames Different frame intervals are used to set different priorities, but this is only a way to reduce collisions and increase the transmission probability of some frames, and does not have absolute priority functions and fixed transmission rate guarantees;

[0006] 3. The wired transmission part of the LAN adopts the Ethernet transmission protocol, and its user data transmission also adopts the competition mode. In network equipment, such as LAN switches, routers, and gateways, most of them adopt the store-and-forward working mode, resulting in excessive data transmission delay. And there is no absolute priority and better reliability guarantee;

[0007] 4. Due to the large number of monitoring and monitoring data terminals in the enterprise wireless LAN, and the access competition of multiple users, the real-time data transmission capability of the access users is low;

[0008] The above four points lead to poor real-time performance of wireless LAN transmission, which affects the use effect of wireless LAN user terminal intercom and video data transmission.

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