A data offload and access method suitable for terahertz dual-band network

Abstract

The invention discloses a data distribution and access mechanism suitable for terahertz double-frequency networks. The data distribution and access mechanism is operated as follows: at any moment, checking whether a user or an upper layer has new data to send or not by a network control module in STA firstly; when new data need to be sent, adding the size of the data to be sent provided by the upper layer into the total size of the existing data to be sent, comparing the added total size of the data to be sent with a set threshold and judging whether the data are transmitted through WiFi or a terahertz channel according to the comparison result; when the terahertz channel is adopted to carry out high-speed transmission, if a terahertz directive antenna is not aligned, sending the data to be sent by a WiFi module and entering a network access control process after alignment. According to the data distribution and access mechanism suitable for terahertz double-frequency networks, the STA can judge whether the data transmission can be carried out through the terahertz channel, wherein data distribution control and network access control are carried out, so that the sufficient utilization rate of the terahertz channel is ensured, no random back-off process is caused and the utilization efficiency of the channel is improved.

Description

technical field [0001] The invention relates to a data distribution and access mechanism in a terahertz dual-frequency network, and belongs to the technical field of wireless communication, in particular to a data distribution and access method suitable for a terahertz dual-frequency network. Background technique [0002] The existing widely used WiFi network uses 2.4GHz or 5GHz for communication. The simplified model of WiFi network architecture is as follows: figure 1 As shown, it is mainly divided into the physical (PHY) layer and the media access control (MAC) layer. The MAC layer is composed of the MAC protocol sublayer and the MAC management module. The PHY layer is composed of the physical medium dependency (PMD) sublayer, the physical protocol convergence ( PLCP) sublayer and PHY management module. [0003] If there is more than one device transmitting the same signal on the same frequency band in the network at the same time, it will cause interference between the ...

AI Technical Summary

Problems solved by technology

Because of the highly directional nature of the antenna, the CSMA / CA access mechanism used in the WiFi network cannot well adapt to the terahertz dual-band network. There are two main reasons: First, even if a certain STA is transmitting terahertz to the AP in a directional signal, other STAs may not be able to receive the signal on the receiving antenna, so they cannot perform physical layer carrier sensing; second, even if other STAs have some kind of carrier sensing mechanism, its efficiency or delay time cannot be compared with physical layer carrier sensing Compared with other mechanisms, if the CSMA / CA access mechanism is forcibly adopted, it is likely to cause a great drop in network efficiency

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