Communication device

Abstract

This device provides a communication device that enables wireless communication that is less prone to disconnection even in the 5.6GHz band through DFS (Dynamic Frequency Selection). [Solution] The communication device according to the present invention comprises a pair of communication antennas A1 and A2 capable of wireless communication, a line redundancy device Rx connected to one of the pair of communication antennas A1 and A2, and a line redundancy device Ry connected to the other of the pair of communication antennas A1 and A2. With the wireless connection of the pair of communication antennas A1 and A2 established on different channels in the 5.6GHz band, under normal circumstances, wireless communication is performed using one pair of communication antennas, and when radar is detected on that channel, the device switches to performing wireless communication using the other pair of communication antennas.

Description

Technical Field

[0001] The present invention relates to a communication device using the 5.6 GHz band (W56).

Background Art

[0002] * Currently, the 4.9 GHz band is used for fixed wireless access (FWA). However, due to frequency reorganization, the 4.9 GHz band has been allocated to the 5G system (the fifth-generation mobile communication system), so FWA needs to migrate to other frequency bands. As a candidate for other frequencies, the 5.6 GHz band (5.47 - 5.725 GHz), called W56 and available for outdoor use, is considered. However, this band includes the frequencies of radar waves transmitted by weather radars and aviation radars. [[ID=~14]]

[0003] [[ID=~16]]Therefore, when performing wireless communication using the 5.6 GHz band, before starting communication on a channel within that band, it is legally obligatory to perform an operation of checking for 1 minute whether a radar wave of a frequency interfering with that channel is being sent from a radar. Furthermore, when a radar wave is detected during communication on a channel within the 5.6 GHz band, it is also legally obligatory to immediately switch the channel used for communication to a channel that does not interfere with the radar wave by DFS (Dynamic Frequency Selection). ~

[0004] Note: There seems to be an error where the asterisk (*) is added in line in the English translation. It should be the same as the original text without this addition. This might be a mistake during the translation process. The overall translation adheres to the provided rules.As a technology to address this, Patent Document 1 describes a communication device that communicates with another communication device by wireless communication, comprising: a selection means for selecting a channel to be used for wireless communication from a predetermined group of channels, including a group of channels that are given priority for use by public institutions; a determination means for determining whether or not a public institution is transmitting radio waves on the channel selected by the selection means, if the channel selected by the selection means is a channel that is given priority for use by public institutions; and a recording means for recording in a storage unit information indicating that radio waves were previously transmitted on the channel when the determination means determines that a public institution is transmitting radio waves on the channel, wherein the selection means selects channels in which the information is not recorded in the storage unit with priority over channels in which the information is recorded in the storage unit. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2012-253807 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, in the communication device described in Patent Document 1, there was a problem in that switching channels using DFS (Dynamic Frequency Selection) resulted in a period of time during which wireless communication was unavailable, causing a temporary interruption of wireless communication.

[0007] Therefore, the objective of this invention is to provide a communication device that enables wireless communication that is less prone to disconnection due to DFS (Dynamic Frequency Selection) even in the 5.6GHz band. [Means for solving the problem]

[0008] The communication device according to the present invention is A pair of communication antennas A1 capable of wireless communication, A pair of communication antennas A2 capable of wireless communication, A line redundancy device Rx is connected to one of the pair of communication antennas A1 and one of the pair of communication antennas A2, A line redundancy device Ry is connected to the other of the pair of communication antennas A1 and the other of the pair of communication antennas A2. It has, The wireless connection of the pair of communication antennas A1 is established on channel c1 in the 5.6GHz band, and the wireless connection of the pair of communication antennas A2 is established on channel c2 in the 5.6GHz band, which is different from channel c1. Normally, wireless communication is performed using either the pair of communication antennas A1 or the pair of communication antennas A2, and when radar is detected on the channel of that wireless communication, the system switches to performing wireless communication using the other of the pair of communication antennas A1 or the pair of communication antennas A2. [Effects of the Invention]

[0009] According to this invention, it is possible to provide a communication device that enables wireless communication that is less likely to be interrupted by DFS (Dynamic Frequency Selection) even in the 5.6GHz band. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram of a communication device according to one embodiment of the present invention. [Modes for carrying out the invention]

[0011] Figure 1 shows a schematic configuration of a communication device according to one embodiment of the present invention. The communication device 1 shown in Figure 1 has a pair of wireless communication antennas A1 and a pair of wireless communication antennas A2.

[0012] Communication antennas A1 and A2 can be appropriately selected according to the purpose. Specific examples include omnidirectional antennas such as monopole antennas (whip antennas) and dipole antennas; and directional antennas such as Yagi-Uda antennas, parabolic antennas, panel antennas, sector antennas, and array antennas. Among these, directional antennas are preferred, and parabolic antennas are more preferred, when considering use in fixed wireless access (FWA). The pair of communication antennas A1 and the pair of communication antennas A2 may be the same or different, but it is preferable that the two communication antennas A1 in a pair are the same, and it is preferable that the two communication antennas A2 in a pair are the same.

[0013] In communication device 1, one of a pair of communication antennas A1 and one of a pair of communication antennas A2 are connected to a line redundancy device Rx, and the other of a pair of communication antennas A1 and the other of a pair of communication antennas A2 are connected to a line redundancy device Ry. Line redundancy devices Rx and Ry are devices that combine multiple communication lines in parallel and distribute data to the appropriate path, and so-called routers can be used. In communication device 1, since the pair of communication antennas A1 and the pair of communication antennas A2 each perform wireless communication in the 5.6GHz band, line redundancy devices Rx and Ry are selected from those that can use W56 channels (100ch, 104ch, 108ch, 112ch, 116ch, 120ch, 124ch, 128ch, 132ch, 136ch, 140ch, 144ch) compliant with IEEE802.11a (11a / n / ac). It is preferable that line redundancy devices Rx and Ry are the same.

[0014] When wireless communication is performed using communication device 1, a wireless connection is established between the pair of communication antennas A1 on one channel c1 in the 5.6GHz band, and a wireless connection is established between the pair of communication antennas A2 on a different channel c2 in the 5.6GHz band. Under normal circumstances, wireless communication is performed using either the pair of communication antennas A1 or the pair of communication antennas A2. However, when radar is detected on the wireless communication channel, the system switches to performing wireless communication using the other of the pair of communication antennas A1 or A2. The radar detection unit and control unit for performing this processing may be built into the line redundancy devices Rx and Ry, or they may be separate units.

[0015] An example of a communication device 1 according to the present invention is a communication device 1 that uses parabolic antennas capable of long-distance wireless communication as communication antennas A1 and A2, uses a multi-line router as line redundancy devices Rx and Ry, and further combines it with a channel switching system. With a communication device 1 configured in this way, for example, a range of 15 km and a throughput of 50 Mbps (maximum) can be achieved, and the 4.9 GHz band can be migrated without significantly changing existing fixed wireless access (FWA) systems.

[0016] According to the communication device of the present invention as described above, wireless communication that is less likely to be interrupted by DFS (Dynamic Frequency Selection) becomes possible even in the 5.6GHz band. [Explanation of Symbols]

[0017] 1. Communication device A1 Communication Antenna A2 Communication Antenna c1 channel c2 channel Rx Line Redundancy Device Ry Line Redundancy Device

Claims

1. A pair of communication antennas A1 capable of wireless communication, A pair of communication antennas A2 capable of wireless communication, A line redundancy device Rx is connected to one of the pair of communication antennas A1 and one of the pair of communication antennas A2, A line redundancy device Ry is connected to the other of the pair of communication antennas A1 and the other of the pair of communication antennas A2. It has, The pair of communication antennas A1 are wirelessly connected on channel c1 in the 5.6 GHz band, and the pair of communication antennas A2 are wirelessly connected on channel c2 in the 5.6 GHz band, which is different from channel c1. Under normal circumstances, wireless communication is performed using either the pair of communication antennas A1 or A2. When radar is detected on the wireless communication channel, the system switches to performing wireless communication using the other of the pair of communication antennas A1 or A2. Communication device.

2. The pair of communication antennas A1 and the pair of communication antennas A2 are both parabolic antennas. The communication device according to claim 1.

Images