A control method for communication of nodes in self-organized Ad hoc network of cellular mobile node

Abstract

The invention discloses a communication control method using nodes in cellular mobile node self-organizing Ad Hoc network of the radio technology, which is characterized by comprising steps of: i, mounting a first transceiver and a second transceiver on the nodes; ii, finding a current usable channel set by a base station, and broadcasting the current usable channel set to the nodes in the network; iii, scanning the current usable channel set by the second transceiver, selecting a group of candidate home channels from the channel set, and randomly selecting one channel as the elected home channel; iv, the node broadcasting the elected home channel to the adjacent nodes on a common control channel via the first transceiver, and monitoring return signals on the network; v, a sending node tuning the second transceiver onto the elected home channel of a receiving node, and accessing the channel in a CSMA / CA manner to perform data transmission. With the invention, the frequency spectrum resource can be effectively used, the data transmission is distributed on a plurality of channels thereby reducing service interaction.

Description

technical field [0001] The invention relates to a wireless communication method, in particular to a non-real-time service transmission in a multi-hop cognitive radio Ad hoc network. Background technique [0002] Cellular network and Ad hoc network have strong complementary advantages in terms of coverage, mobility, data rate, network management, and cost performance, so they have become the main focus of research on network interoperability and integration. With the rapid increase of mobile users and traffic , the utilization of frequency resources has reached the limit. Cognitive radio is an intelligent wireless communication technology that provides users with high-capacity services through dynamic access to spectrum, and can greatly improve the existing inefficient frequency utilization. By using cognitive radio technology, unlicensed users (secondary users) can effectively use the spectrum that licensed users (primary users) do not use at a certain time and in a specifi...

AI Technical Summary

Problems solved by technology

However, in a multi-hop cognitive radio network, unlike a general multi-channel multi-hop Ad hoc network, its available channel set changes with time and location, and the number of channels in the available channel set may also be large, so it is impossible to Each node is equipped with transceivers equivalent to the number of channels

Furthermore, it will be difficult to achieve clock synchronization without a common control channel in cognitive radio networks

Later, someone proposed Slotted Seeded Channel Hopping (SSCH). Each node only needs one transceiver, but this method is not suitable for multi-hop networks, because for each hop communication, both the transceiver and the transceiver need to work on the same channel, which will cause a lot of problems. large delay

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