A method and system for data transmission and node devices and coordination device

Abstract

The embodiment of the invention discloses a data transmission method which comprises the following steps: nodes in the network transmit guaranteed time slot (GTS) requests to a coordinator. The coordinator distributes GTS for the node according to the priority levels of the to-be-transmitted data in the received node GTS requests. The nodes transmit data in the distributed GTS. If the coordinator receives the GTS requests from nodes of high-level priority, the GTS distributed for current nodes of low-level priority can be reduced or stopped and distributes the GTS to the nodes of high-level priority, thus guaranteeing important information in the network can be transmitted preferentially. The embodiment of the invention also discloses a data transmission system as well as a node device and a coordinating device. By application of the system and devices, important information in the network can be transmitted preferentially and thus network service quality (QoS) service can be provided partially.

Description

Technical field [0001] The present invention relates to Zigbee network technology, in particular to a method and system for sending data, as well as node equipment and coordination equipment. Background technique [0002] Zigbee is an emerging short-distance, low-speed, low-cost, low-power wireless communication technology, which is mainly used in home control, industrial detection, and sensor networks. The Zigbee network is a wireless network composed of many wireless transmission nodes. In the entire network, these transmission nodes communicate with each other. [0003] Zigbee mainly works in the three frequency bands of 868MHz (Europe), 915MHz (US) and 2.4GHz (global). The transmission rate is less than 250Kb / s, and the communication distance is within 100 meters. The IEEE 802.15.4 standard is used as the physical layer and Media access control (MAC) layer standard, and the application layer and network layer standards are formulated by the Zigbee Alliance. [0004] The Zigbe...

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Problems solved by technology

[0019] It can be seen that in the existing Zigbee beacon network, all data are processed and sent equally. In the GTS mechanism, the coordinator can only allocate GTS according to the principle of first-come-first-served, but cannot adjust the sending order of data. That is, it is impossible to send important data first

[0020] With the continuous development of Zigbee technology, the business types and information forms are constantly enriched. If the data is still sent in the existing way, it will inevitably cause some important information to be delayed or even unable to be sent due to the inability to apply for the GTS time slot first. Reduced network service quality

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