Method and device for realizing band switching and topology control

Abstract

The invention discloses a method and a device for realizing band switching and topology control. The method comprises the following steps: triggering the band switching through a node; detecting whether the node is a key node or not according to the adjacent node information of the collected node if the band switching is switched from an authorized band to an unauthorized band; if so, refusing the switching; otherwise, carrying out the switching; and carrying out the switching if the band switching is switched from the unauthorized band to the authorized band. The device for realizing the band switching comprises a band triggering unit, a detecting unit and a switching unit. The method and the device provide the novel topology control technology for perceiving the radio technology; and inaddition, the method and the device can also reduce the energy consumption of wireless networks effectively, reduce the waste of power and prolong the lifetime of the networks.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for realizing frequency band switching and topology control. Background technique [0002] The development of wireless communication technology is becoming more and more difficult to meet people's needs in the field of wireless access. In order to alleviate this contradiction, people use new frequency bands to continuously develop new wireless access technologies. However, due to the The size and power of node antennas are limited, and the frequency bands that can be used for wireless access technologies are very limited. The appearance of Cognitive Radio (CR, Cognitive Radio) technology has created a new situation for solving the problem that the frequency bands that nodes can use for wireless access technology are very limited. [0003] CR technology refers to a wireless communication technology that includes an intelligent transceiver, which can int...

AI Technical Summary

Problems solved by technology

However, in the case of uneven distribution of nodes, some nodes are densely located, and some are relatively far away, such as isolated nodes (nodes at the edge of the network), and densely located nodes require low transmission power, while distant nodes require The transmission power is high. According to the provisions of the COMPOW protocol, all nodes need to use the same transmission power, and the transmission power used should be minimized under the premise of ensuring network connectivity. Therefore, it is necessary to use transmit power, so it is undoubtedly a waste for nodes that require less transmit power

Therefore, the COMPOW protocol is not suitable for situations where the distribution of nodes is uneven

[0011] Because CR technology can intelligently perceive the available frequency band of the channel in the wireless communication system, and switch the node frequency band to the available frequency band of the perceived channel, if the COMPOW protocol is used, the topology of the wireless communication network will change due to the switching behavior of the CR technology. Changes, resulting in uneven distribution of nodes, so the COMPOW protocol is not suitable for CR technology

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