CN115347929A - Vehicle-mounted equipment antenna switching method and system - Google Patents
Vehicle-mounted equipment antenna switching method and system Download PDFInfo
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- CN115347929A CN115347929A CN202210779190.6A CN202210779190A CN115347929A CN 115347929 A CN115347929 A CN 115347929A CN 202210779190 A CN202210779190 A CN 202210779190A CN 115347929 A CN115347929 A CN 115347929A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H04B7/0608—Antenna selection according to transmission parameters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
- H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention relates to a method and a system for switching an antenna of vehicle-mounted equipment, wherein the switching method comprises the following steps: detecting a V2X signal received by a first antenna channel; judging whether the antenna switching condition is met or not according to the V2X signal; if so, controlling an omnidirectional antenna path in the first antenna channel to be switched to a directional antenna path; if not, the current antenna path is kept and the V2X signal received by the omnidirectional antenna channel is continuously detected. The invention can solve the problem of low communication performance between vehicles caused by poor performance of the C-V2X antenna, expands the communication range of the vehicle-mounted equipment, and simultaneously, only one path and one directional antenna need to be added on hardware, thereby greatly reducing the hardware cost and further reducing the product cost. In addition, the control signal required by the invention is not limited by a C-V2X module manufacturer, so that the convenience and the universality of equipment research and development and manufacture can be obviously improved.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted devices, in particular to a method and a system for switching an antenna of a vehicle-mounted device.
Background
With the rapid increase of the automobile ownership and the advance of the car networking technology. The information transmission requirements between the automobile and the roadside base station and between the automobile and the surrounding vehicles are increasing. Because the vehicle-mounted equipment antenna usually has the characteristic of high integration level of a plurality of antennas and is limited by the structure of the automobile, the selectable placement positions of the antennas are not many. This makes the performance of the omnidirectional antenna for C-V2X communication greatly affected by other surrounding antennas (e.g. 4G/5g, gnss antennas) and vehicle body structures (e.g. roof, sunroof, etc.), thereby affecting the vehicle-to-vehicle communication performance. In addition, antenna theory determines that there is an upper limit to the gain of an omni-directional antenna in a certain space. Therefore, how to ensure the performance of the antenna and improve the quality of wireless communication between vehicles is very critical for the wide application of C-V2X.
At present, various C-V2X modules mostly adopt a double-radio-frequency channel and double-antenna scheme to improve communication performance, namely, two C-V2X antennas alternately transmit signals, and the wireless communication quality is improved by utilizing the complementation between two antenna directional diagrams. However, as described above, the scheme of multi-antenna integration and the characteristics of the omni-directional antenna itself determine that the scheme can only optimize the omni-directional coverage, that is, the communication blind area within a certain communication distance is reduced, and the enhancement effect on the communication distance is not significant.
At present, there is also a radio frequency power compensation module applied to an antenna end, but on one hand, since a C-V2X system is time division transceiving, a switch is needed to switch a transceiving path at a radio frequency front end of the compensation module, which requires strict synchronization of a switch switching timing of the power compensation module and a transceiving timing of a V2X module to ensure signal integrity. Therefore, the compensation module has to be deeply cooperated with and bound with the V2X module, and one compensation module cannot be matched with C-V2X modules of different manufacturers. On the other hand, after the radio frequency power compensation module scheme is adopted, more components are required to be added on the antenna side and the board end of the vehicle-mounted equipment on hardware to achieve signal enhancement and synchronization, and therefore the product cost is remarkably increased.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a system for switching an antenna of a vehicle-mounted device, aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the antenna switching method for the vehicle-mounted equipment is constructed and comprises the following steps:
detecting a V2X signal received by a first antenna channel;
judging whether an antenna switching condition is met or not according to the V2X signal;
if so, controlling an omnidirectional antenna path in the first antenna channel to be switched to a directional antenna path;
if not, keeping the current antenna path and continuously detecting the V2X signal received by the first antenna channel.
In the antenna switching method for the vehicle-mounted device according to the present invention, the method further includes:
after the directional antenna path is switched to, detecting a V2X signal received by the directional antenna path;
judging whether an antenna switching condition is met or not according to the V2X signal;
if so, controlling the directional antenna path to be switched to an omnidirectional antenna path in the first antenna channel;
if not, keeping the current antenna path and continuously detecting the V2X signal received by the directional antenna path.
In the antenna switching method for a vehicle-mounted device according to the present invention, the determining whether an antenna switching condition is satisfied according to the V2X signal includes:
processing the V2X signal to obtain the signal intensity of the V2X signal;
comparing a signal strength of the V2X signal to a first threshold;
if the signal intensity of the V2X signal is smaller than the first threshold, an antenna switching condition is met; and if the signal intensity of the V2X signal is greater than or equal to the first threshold value, the antenna switching condition is not met.
In the antenna switching method for the vehicle-mounted device according to the present invention, the determining whether an antenna switching condition is satisfied according to the V2X signal includes:
processing the V2X signal to obtain the signal intensity of the V2X signal;
comparing the signal strength of the V2X signal to a second threshold;
if the signal intensity of the V2X signal is greater than or equal to the second threshold, an antenna switching condition is met; if the signal strength of the V2X signal is less than the second threshold, the antenna switching condition is not satisfied.
In the antenna switching method for the vehicle-mounted device according to the present invention, the first antenna path includes: a first omnidirectional antenna and a directional antenna; the first omnidirectional antenna is an omnidirectional antenna path in the first antenna channel, and the directional antenna is a directional antenna path in the first antenna channel; the first omnidirectional antenna and the directional antenna are V2X communication antennas.
The invention also provides a system for switching the antenna of the vehicle-mounted equipment, which comprises the following components: the antenna switching device comprises a vehicle-mounted unit, an antenna switching unit and a first antenna channel;
the first antenna channel is connected with the antenna switching unit and is used for receiving and transmitting a V2X signal;
the antenna switching unit is connected with the vehicle-mounted unit and used for switching between a directional antenna path and an omnidirectional antenna path in the first antenna channel according to the control of the vehicle-mounted unit;
and the vehicle-mounted unit is used for controlling the antenna switching unit to execute switching according to the signal strength of the V2X signal.
In the antenna switching system for an in-vehicle device according to the present invention, the first antenna path includes: a first omni-directional antenna and a directional antenna; the first omnidirectional antenna is an omnidirectional antenna path in the first antenna channel, and the directional antenna is a directional antenna path in the first antenna channel; the first omnidirectional antenna and the directional antenna are V2X communication antennas.
In the antenna switching system of the vehicle-mounted equipment, after the antenna switching system is started to operate, the antenna switching unit is used for communicating the first omnidirectional antenna with the vehicle-mounted unit and disconnecting the directional antenna from the vehicle-mounted unit.
In the antenna switching system for the in-vehicle device according to the present invention, the in-vehicle unit is further configured to:
and detecting a V2X signal received by the first antenna channel, judging whether an antenna switching condition is met or not according to the V2X signal, and outputting a switching control signal to the antenna switching unit when the antenna switching condition is met so as to control the omnidirectional antenna passage to be disconnected from the vehicle-mounted unit and control the directional antenna passage to be communicated with the vehicle-mounted unit.
In the antenna switching system for the vehicle-mounted device according to the present invention, after switching to the directional antenna path, the vehicle-mounted unit is further configured to:
and detecting the V2X signal received by the directional antenna channel, judging whether an antenna switching condition is met or not according to the V2X signal, and outputting a switching control signal to the antenna switching unit when the antenna switching condition is met so as to control the directional antenna channel to be disconnected with the vehicle-mounted unit and control the omnidirectional antenna channel to be communicated with the vehicle-mounted unit.
The method and the system for switching the antenna of the vehicle-mounted equipment have the following beneficial effects: the switching method comprises the following steps: detecting a V2X signal received by a first antenna channel; judging whether the antenna switching condition is met or not according to the V2X signal; if so, controlling an omnidirectional antenna path in the first antenna channel to be switched to a directional antenna path; if not, the current antenna path is kept and the V2X signal received by the omnidirectional antenna channel is continuously detected. The invention can solve the problem of low communication performance between vehicles caused by poor performance of the C-V2X antenna, expands the communication range of the vehicle-mounted equipment, and simultaneously only needs to add a path and a directional antenna on hardware, thereby greatly reducing the hardware cost and further reducing the product cost. In addition, the control signal required by the invention is not limited by a C-V2X module manufacturer, so that the convenience and the universality of equipment research and development and manufacture can be obviously improved.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic structural diagram of an antenna switching system of a vehicle-mounted device according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of an antenna switching method for a vehicle-mounted device according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Because C-V2X needs to guarantee smooth communication with the vehicle in a certain area right in front of the vehicle when the vehicle-vehicle communication is carried out, on the premise that the same antenna occupies space, the directional antenna 12 has stronger directivity relative to the omnidirectional antenna, and therefore, the gain in a specific direction (such as right in front of or right behind the vehicle) is obviously improved, therefore, the invention adds one directional antenna path on the basis of the first antenna channel 10 of the double radio frequency path, not only can guarantee that the omnidirectional antenna is used when the signal is good, but also can switch one omnidirectional antenna path pointing to the front of the vehicle to the directional antenna path when the signal is poor, preferentially guarantee the communication with the vehicle in front, solve the problem of the reduction of the vehicle-vehicle communication performance caused by poor performance of the C-V2X antenna, and expand the communication range of the vehicle-mounted equipment.
Specifically, referring to fig. 1, a schematic structural diagram of an alternative embodiment of the antenna switching system of the vehicle-mounted device provided in the present invention is shown.
As shown in fig. 1, the antenna switching system for the in-vehicle device includes: an on-board unit 30, an antenna switching unit 20, and a first antenna channel 10. Further, as shown in fig. 1, the antenna switching system of the vehicle-mounted device further includes: a second antenna channel 40.
The first antenna channel 10 is connected to the antenna switching unit 20 for transceiving V2X signals.
In some embodiments, the first antenna lane 10 includes: a first omnidirectional antenna 11 and a directional antenna 12. The second antenna channel 40 includes: a second omnidirectional antenna 41. The first omnidirectional antenna 11 and the second omnidirectional antenna 41 are both V2X communication antennas, and both may be used to receive and transmit V2X signals. Optionally, in this embodiment of the present invention, the first omnidirectional antenna 11 and the second omnidirectional antenna 41 may be disposed at the same position in the vehicle-mounted device, or may also be disposed at front and back positions of the vehicle-mounted device (for example, the first omnidirectional antenna 11 is disposed near the head of the vehicle, and the second omnidirectional antenna 41 is disposed near the tail of the vehicle).
As shown in fig. 1, the first omnidirectional antenna 11 is connected to the antenna switching unit 20, the second omnidirectional antenna 41 is connected to the on-board unit 30, and both the first omnidirectional antenna 11 and the second omnidirectional antenna 41 are connected to the on-board unit 30 after the system is started.
As shown in fig. 1, the directional antenna path includes: a directional antenna 12. The directional antenna 12 is connected to the antenna switching unit 20, and is used for transceiving V2X signals.
In some embodiments, the directional antenna 12 is oriented in and parallel to the direction of vehicle travel. Optionally, in this embodiment of the present invention, the directional antenna 12 is a V2X communication antenna, and can implement transceiving of a V2X signal.
Specifically, after the system is started, the directional antenna 12 and the on-board unit 30 are in an off state, that is, the directional antenna 12 does not perform the function of transmitting and receiving V2X signals. When the vehicle-mounted unit 30 determines that the antenna switching condition is satisfied according to the V2X signal, the antenna switching unit 20 controls the directional antenna 12 to connect with the vehicle-mounted unit 30, and at this time, the directional antenna 12 transmits the V2X signal to the vehicle-mounted unit 30. In the process of connecting the directional antenna 12 and the vehicle-mounted unit 30, the first omnidirectional antenna 11 and the vehicle-mounted unit 30 are in a disconnected state.
The antenna switching unit 20 is connected to the on-board unit 30, and performs switching between the directional antenna path and the omnidirectional antenna path in the first antenna path 10 according to control of the on-board unit 30.
Specifically, as shown in fig. 1, the antenna switching unit 20 is disposed between the first antenna tunnel 10 and the vehicle-mounted unit 30, and the switching between the first omnidirectional antenna 11 and the directional antenna 12 can be realized by the switching function of the antenna switching unit 20. After the system is started to operate, the antenna switching unit 20 controls the first omnidirectional antenna 11 to be communicated with the vehicle-mounted unit 30 and controls the directional antenna 12 to be disconnected from the vehicle-mounted unit 30; when receiving a switching control signal for switching to the directional antenna 12, the antenna switching unit 20 controls the first omnidirectional antenna 11 to be disconnected from the on-board unit 30, and simultaneously controls the directional antenna 12 to be connected to the on-board unit 30; when receiving a switching control signal to switch back to the first omnidirectional antenna 11, the antenna switching unit 20 controls the first omnidirectional antenna 11 to be connected to the on-board unit 30 and simultaneously controls the directional antenna 12 to be disconnected from the on-board unit 30.
Alternatively, in the embodiment of the present invention, the antenna switching unit 20 may be a single-pole double-throw switch.
In some embodiments, the antenna switching unit 20 may be integrated on the motherboard of the vehicle-mounted unit 30 in the form of a circuit, or may be integrated into an antenna. Further, the antenna switching unit 20 is physically located between the antennas (the first omnidirectional antenna 11 and the directional antenna 12) and the on-board unit 30, and is connected to the on-board unit 30 by means of PCB integration or radio frequency cable connection, and the on-board unit 30 further provides the dc power supply and the control signal to the antenna switching unit 20.
The on-board unit 30 is used for controlling the antenna switching unit 20 to perform switching according to the signal strength of the V2X signal.
In some embodiments, the on-board unit 30 is further configured to: the V2X signal received by the first antenna channel 10 is detected, whether the antenna switching condition is satisfied is determined according to the V2X signal, and when the antenna switching condition is satisfied, a switching control signal is output to the antenna switching unit 20 to control the omnidirectional antenna path in the first antenna channel 10 to be disconnected from the on-board unit 30 and control the directional antenna path to be communicated with the on-board unit 30.
In some embodiments, after switching to the directional antenna path, the on-board unit 30 is further configured to: and detecting a V2X signal received by the directional antenna channel, judging whether an antenna switching condition is met or not according to the V2X signal, and outputting a switching control signal to the antenna switching unit 20 when the antenna switching condition is met so as to control the directional antenna channel to be disconnected from the on-board unit 30 and control the omnidirectional antenna channel in the first antenna channel 10 to be communicated with the on-board unit 30.
Optionally, in the embodiment of the present invention, the on-board unit 30 may be a C-V2X on-board device.
Specifically, when the system starts to operate (i.e., after the system starts to operate), the antenna switching unit 20 controls the first omnidirectional antenna 11 to be communicated with the on-board unit 30, the on-board unit 30 continuously detects the V2X signal received by the first omnidirectional antenna 11 after the system starts to operate, and performs detection processing on the V2X signal to obtain the signal strength of the V2X signal, and performs judgment according to the signal strength of the V2X signal, and when the signal strength of the V2X signal is smaller than a first threshold, the on-board unit 30 outputs a switching control signal to the antenna switching unit 20 to control the antenna channel to be switched to the directional antenna 12; after switching to the directional antenna 12, the on-board unit 30 detects the V2X signal received by the directional antenna 12, and determines according to the signal strength of the V2X signal, and when the signal strength of the V2X signal is greater than or equal to the second threshold, the on-board unit 30 outputs a switching control signal to the antenna switching unit 20 to control the antenna channel to be switched to the first omnidirectional antenna 11. A specific handover method can refer to fig. 2.
In some embodiments, as shown in fig. 2, the antenna switching method for the vehicle-mounted device includes the following steps:
step S201 detects the V2X signal received by the first antenna channel 10.
In some embodiments, as shown in fig. 1, the first antenna channel 10 includes: a first omnidirectional antenna 11 and a directional antenna 12. Wherein the first omnidirectional antenna 11 is an omnidirectional antenna path in the first antenna channel 10, and the directional antenna 12 is a directional antenna path in the first antenna channel 10. The first omni-directional antenna 11 and the directional antenna 12 are V2X communication antennas.
Specifically, as shown in fig. 1, after the system starts to operate, the vehicle-mounted unit 30 detects the V2X signal received by the first omnidirectional antenna 11 through the antenna switching unit 20. Wherein, the V2X signal may include, but is not limited to, V2X mutual information.
And S202, judging whether the antenna switching condition is met or not according to the V2X signal.
In some embodiments, determining whether the antenna switching condition is satisfied according to the V2X signal includes: processing the V2X signal to obtain the signal intensity of the V2X signal; comparing the signal strength of the V2X signal to a first threshold; if the signal intensity of the V2X signal is smaller than a first threshold value, the antenna switching condition is met; if the signal strength of the V2X signal is greater than or equal to the first threshold, the antenna switching condition is not satisfied.
Optionally, in the embodiment of the present invention, the signal strength of the V2X signal may be obtained by performing detection processing on a V2X module in the vehicle-mounted unit 30.
Step S203, if yes, the omni-directional antenna path in the first antenna channel 10 is controlled to be switched to the directional antenna path.
Specifically, when the signal strength of the V2X signal is less than the first threshold, the on-board unit 30 outputs a switching control signal (e.g., high level) to the antenna switching unit 20, and the antenna switching unit 20 controls the first omnidirectional antenna 11 to be disconnected from the on-board unit 30 according to the switching control signal output by the on-board unit 30, and controls the directional antenna 12 to be connected to the on-board unit 30, so that the omnidirectional antenna path in the first antenna channel 10 is switched to the directional antenna path.
Step S204, if not, the current antenna path is maintained and the V2X signal received by the first antenna channel 10 is continuously detected.
Specifically, when the signal strength of the V2X signal is greater than or equal to the first threshold, the on-board unit 30 does not output the switching control signal, and the first omnidirectional antenna 11 and the on-board unit 30 are kept connected, so that the current antenna path is kept, and the V2X signal received by the first omnidirectional antenna 11 is continuously detected.
Further, the following steps are also included after step S203:
and step S205, after the directional antenna path is switched to, detecting the V2X signal received by the directional antenna path.
Specifically, in step S203, when the signal strength of the V2X signal is smaller than the first threshold, the antenna switching unit 20 controls the first omnidirectional antenna 11 to be disconnected from the in-vehicle unit 30 while controlling the directional antenna 12 to be connected to the in-vehicle unit 30, so that the switching from the omnidirectional antenna path to the directional antenna path is completed, and after the switching, at this time, in the first antenna path 10, the V2X signal is transmitted from the directional antenna 12 to the in-vehicle unit 30, so that, after the switching to the directional antenna path, the in-vehicle unit 30 detects the V2X signal received by the directional antenna 12.
And step S206, judging whether the antenna switching condition is met or not according to the V2X signal.
In some embodiments, determining whether the antenna switching condition is satisfied according to the V2X signal includes: processing the V2X signal to obtain the signal intensity of the V2X signal; comparing the signal strength of the V2X signal to a second threshold; if the signal intensity of the V2X signal is larger than or equal to a second threshold value, the antenna switching condition is met; and if the signal intensity of the V2X signal is smaller than the second threshold value, the antenna switching condition is not met.
Optionally, in this embodiment of the present invention, the signal strength of the V2X signal may be obtained by performing detection processing on a V2X module of the vehicle-mounted unit 30.
Further, in the embodiment of the present invention, specific setting criteria of the first threshold and the second threshold may be defined according to actual use based on a vehicle-mounted device manufacturer. Moreover, the difference between the first threshold and the second threshold should satisfy a certain difference range, where the difference range between the first threshold and the second threshold is determined by the signal fluctuation condition in the actual scene, and the present invention is not limited in particular. By keeping the difference between the first threshold and the second threshold to satisfy a certain difference range (i.e., large enough), the antenna switching back and forth due to signal fluctuation in practical application scenarios can be avoided.
Step S207, if yes, the directional antenna path is controlled to be switched to the omnidirectional antenna path in the first antenna channel 10.
Specifically, when the signal strength of the V2X signal is greater than or equal to the second threshold, the on-board unit 30 outputs a switching control signal (e.g., low level) to the antenna switching unit 20, and the antenna switching unit 20 controls the directional antenna 12 to be disconnected from the on-board unit 30 according to the switching control signal output by the on-board unit 30, and controls the first omnidirectional antenna 11 to be connected to the on-board unit 30, so that the directional antenna path in the first antenna path 10 is switched to the omnidirectional antenna path.
And step S208, if not, keeping the current antenna path and continuously detecting the V2X signals received by the directional antenna path.
Specifically, when the signal strength of the V2X signal is smaller than the second threshold, the on-board unit 30 does not output the switching control signal, and the directional antenna 12 is communicated with the on-board unit 30, so as to maintain the current antenna path and continue to monitor the V2X signal transmitted by the directional antenna 12.
The invention can solve the problem of reduced communication performance of the vehicle-workshop caused by poor performance of the C-V2X antenna, and expands the communication range of the vehicle-mounted equipment. Meanwhile, only one path and one directional antenna 12 need to be added on the hardware, and the cost of the hardware needed for realizing the purpose is low. In addition, the control signal required by the invention is not limited by C-V2X module manufacturers, namely, the same hardware system can be suitable for C-V2X modules of different manufacturers. Therefore, the convenience of research and development is greatly improved for equipment manufacturers.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A method for switching antennas of vehicle-mounted equipment is characterized by comprising the following steps:
detecting a V2X signal received by a first antenna channel;
judging whether an antenna switching condition is met or not according to the V2X signal;
if so, controlling an omnidirectional antenna path in the first antenna channel to be switched to a directional antenna path;
if not, keeping the current antenna path and continuously detecting the V2X signal received by the first antenna channel.
2. The vehicle-mounted device antenna switching method according to claim 1, characterized by further comprising:
after the directional antenna path is switched to, detecting a V2X signal received by the directional antenna path;
judging whether an antenna switching condition is met or not according to the V2X signal;
if so, controlling the directional antenna path to be switched to an omnidirectional antenna path in the first antenna channel;
if not, keeping the current antenna path and continuously detecting the V2X signal received by the directional antenna path.
3. The vehicle-mounted device antenna switching method according to claim 1, wherein the determining whether an antenna switching condition is satisfied according to the V2X signal includes:
processing the V2X signal to obtain the signal intensity of the V2X signal;
comparing the signal strength of the V2X signal to a first threshold;
if the signal intensity of the V2X signal is smaller than the first threshold value, an antenna switching condition is met; and if the signal intensity of the V2X signal is greater than or equal to the first threshold value, the antenna switching condition is not met.
4. The vehicle-mounted device antenna switching method according to claim 2, wherein the determining whether an antenna switching condition is satisfied according to the V2X signal includes:
processing the V2X signal to obtain the signal intensity of the V2X signal;
comparing the signal strength of the V2X signal to a second threshold;
if the signal intensity of the V2X signal is greater than or equal to the second threshold, an antenna switching condition is met; if the signal strength of the V2X signal is less than the second threshold, the antenna switching condition is not satisfied.
5. The vehicle-mounted device antenna switching method according to claim 1, wherein the first antenna channel includes: a first omnidirectional antenna and a directional antenna; the first omnidirectional antenna is an omnidirectional antenna path in the first antenna channel, and the directional antenna is a directional antenna path in the first antenna channel; the first omnidirectional antenna and the directional antenna are V2X communication antennas.
6. An antenna switching system for a vehicle-mounted device, comprising: the antenna switching device comprises a vehicle-mounted unit, an antenna switching unit and a first antenna channel;
the first antenna channel is connected with the antenna switching unit and used for receiving and transmitting a V2X signal;
the antenna switching unit is connected with the vehicle-mounted unit and used for switching between a directional antenna channel and an omnidirectional antenna channel in the first antenna channel according to the control of the vehicle-mounted unit;
and the vehicle-mounted unit is used for controlling the antenna switching unit to execute switching according to the signal strength of the V2X signal.
7. The in-vehicle device antenna switching system according to claim 6, wherein the first antenna lane includes: a first omni-directional antenna and a directional antenna; the first omnidirectional antenna is an omnidirectional antenna path in the first antenna channel, and the directional antenna is a directional antenna path in the first antenna channel; the first omnidirectional antenna and the directional antenna are V2X communication antennas.
8. The vehicle-mounted device antenna switching system according to claim 7, wherein after the vehicle-mounted device antenna switching system starts to operate, the antenna switching unit is configured to connect the first omnidirectional antenna to the vehicle-mounted unit and disconnect the directional antenna from the vehicle-mounted unit.
9. The in-vehicle device antenna switching system according to claim 8, wherein the in-vehicle unit is further configured to:
and detecting a V2X signal received by the first antenna channel, judging whether an antenna switching condition is met or not according to the V2X signal, and outputting a switching control signal to the antenna switching unit when the antenna switching condition is met so as to control the omnidirectional antenna channel to be disconnected from the vehicle-mounted unit and control the directional antenna channel to be communicated with the vehicle-mounted unit.
10. The on-board unit antenna switching system according to claim 9, wherein after switching to the directional antenna path, the on-board unit is further configured to:
and detecting a V2X signal received by the directional antenna channel, judging whether an antenna switching condition is met or not according to the V2X signal, and outputting a switching control signal to the antenna switching unit when the antenna switching condition is met so as to control the directional antenna channel to be disconnected from the vehicle-mounted unit and control the omnidirectional antenna channel to be communicated with the vehicle-mounted unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210779190.6A CN115347929A (en) | 2022-07-04 | 2022-07-04 | Vehicle-mounted equipment antenna switching method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210779190.6A CN115347929A (en) | 2022-07-04 | 2022-07-04 | Vehicle-mounted equipment antenna switching method and system |
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| CN115347929A true CN115347929A (en) | 2022-11-15 |
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| CN202210779190.6A Pending CN115347929A (en) | 2022-07-04 | 2022-07-04 | Vehicle-mounted equipment antenna switching method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116939752A (en) * | 2023-09-18 | 2023-10-24 | 迪泰（浙江）通信技术有限公司 | Shipborne communication device and communication method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116939752A (en) * | 2023-09-18 | 2023-10-24 | 迪泰（浙江）通信技术有限公司 | Shipborne communication device and communication method thereof |
| CN116939752B (en) * | 2023-09-18 | 2024-01-12 | 迪泰（浙江）通信技术有限公司 | Shipborne communication device and communication method thereof |
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