CN113438741A - Multi-frequency band broadband wireless access system and method - Google Patents
Multi-frequency band broadband wireless access system and method Download PDFInfo
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- CN113438741A CN113438741A CN202110719838.6A CN202110719838A CN113438741A CN 113438741 A CN113438741 A CN 113438741A CN 202110719838 A CN202110719838 A CN 202110719838A CN 113438741 A CN113438741 A CN 113438741A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Abstract
The invention discloses a multi-band broadband wireless access system and a method thereof, wherein the system comprises an antenna group, multi-band broadband access equipment and an access device; the antenna group, the multi-band broadband access equipment and the access device are sequentially in communication connection. The multi-band broadband wireless access system and the method thereof provided by the invention have the advantages that the multi-band broadband access equipment is used, the occupied frequency band can be flexibly adjusted according to the occupation situation of the current frequency band resource, when the authorized frequency spectrum resource is in an idle state, other equipment uses the idle frequency spectrum resource, not only one frequency band is occupied, but also the part of the idle frequency spectrum resource can be fully utilized, the utilization rate of the frequency spectrum resource is improved, and the throughput of the mobile ad hoc network and the forwarding efficiency of multi-hop service are facilitated.
Description
Technical Field
The invention relates to the field of electronic communication, in particular to a multi-band broadband wireless access system and a multi-band broadband wireless access method.
Background
With the rapid development of wireless communication technology, spectrum resources become more and more strained. Especially, with the development of Wireless Local Area Network (WLAN) technology and Wireless Personal Area Network (WPAN) technology, more and more people access the internet in a wireless manner through these technologies. Due to the rapid development of WLAN and WPAN wireless communication services, the unlicensed frequency bands in which these networks operate have become increasingly saturated. In the prior art, when a fixed spectrum allocation mode is used, a plurality of frequency bands are in an idle state for a long time in time and space, the utilization rate is low, and seamless communication cannot be realized at any time and any place; each section of spectrum is fixedly allocated for use, even if the authorized spectrum resources are in an idle state, other devices cannot use the idle spectrum resources, so that the part of the idle spectrum resources cannot be fully utilized, the utilization rate of the spectrum resources is limited, and the throughput of the mobile ad hoc network and the forwarding efficiency of the multi-hop service are restricted. Meanwhile, with the rapid growth of global mobile communication services, wireless network operators are increasingly involved in mobile broadband access and rich multimedia services, but the channel capacity of existing equipment in the market cannot support the increasing service requirements of users, the wireless network spectrum utilization rate and the network coverage range are reduced, and the spectrum utilization rate is low due to a static spectrum allocation strategy.
Disclosure of Invention
The invention aims to provide a multi-band broadband wireless access system and a multi-band broadband wireless access method.
The multi-band broadband wireless access system comprises an antenna group, multi-band broadband access equipment and an access device; the antenna group, the multi-band broadband access equipment and the access device are sequentially in communication connection.
The multi-band broadband wireless access method provided by the invention comprises the following steps:
s1 is a step of scanning the frequency band signal in a set period;
s2 is a step for processing the frequency band signal;
s3 is used for analyzing the processed signal and acquiring parameter information;
s4 a step of comparing the analyzed information;
and S5 is used for switching the frequency band according to the compared information.
The multi-band broadband wireless access method provided by the invention comprises a wireless dynamic band selection and allocation step, and specifically comprises the following steps:
s1 is used for detecting the link quality and generating the step of the testing result;
s2 is used for detecting whether there is a step that the authorized user is using in the current frequency band, if the detection result is that there is the authorized user, the signal transmission is stopped;
s3 switches the current operating frequency to the frequency with the least interference intensity.
The multi-band broadband wireless access method provided by the invention comprises the following steps:
the method comprises the steps that information transmission between a first equipment node and a second equipment node is achieved through a first frequency;
the information transmission between the second equipment node and the third equipment node is realized by adopting a second frequency;
the first frequency and the second frequency have different values.
The multi-band broadband wireless access system and the method thereof provided by the invention have the advantages that the multi-band broadband access equipment is used, the occupied frequency band can be flexibly adjusted according to the occupation situation of the current frequency band resource, when the authorized frequency spectrum resource is in an idle state, other equipment uses the idle frequency spectrum resource, not only one frequency band is occupied, but also the part of the idle frequency spectrum resource can be fully utilized, the utilization rate of the frequency spectrum resource is improved, and the throughput of the mobile ad hoc network and the forwarding efficiency of multi-hop service are facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a multiband broadband wireless access system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a multiband broadband access device according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of an interface processing unit according to a second embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a radio frequency unit according to a third embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a bi-directional power amplifier according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram illustrating steps of a multiband broadband wireless access method according to a fifth embodiment of the present invention;
fig. 7 is a schematic diagram of a wireless dynamic band selection allocation procedure according to a sixth embodiment of the present invention.
The labels in the figure are:
1-an antenna group; the 2-bidirectional power amplifier comprises a power supply; 3-a first single pole double throw switch; 4-a second single pole double throw switch; 5-a first low noise amplifier; 6-a second low noise amplifier; 7-a power combining circuit; 8-a first power amplifier; 9-a second power amplifier; 10-an attenuation chip; 11-a directional coupler; 12-a transceiving switching control circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the multiband broadband wireless access system provided in this embodiment includes an antenna group, a multiband broadband access device, and an access apparatus; the antenna group, the multi-band broadband access equipment and the access device are sequentially in communication connection.
As can be understood by those skilled in the art, in the multi-band broadband wireless access system in the prior art, a single-band broadband access device is used, and when the system is used, on one hand, a plurality of devices occupy the band, which often causes congestion in the band and affects communication quality; on the other hand, other frequency bands are in an idle state for a long time, so that the utilization rate of the frequency bands is low. In the multi-band broadband wireless access system in the embodiment, because the multi-band broadband access device is used, the occupied frequency band can be flexibly adjusted according to the occupation situation of the current frequency band resource, when the authorized frequency spectrum resource is in an idle state, other devices use the idle frequency spectrum resource, not only occupy one frequency band, but also fully utilize the idle frequency spectrum resource, improve the utilization rate of the frequency spectrum resource, and be beneficial to the throughput of the mobile ad hoc network and the forwarding efficiency of the multi-hop service.
Further, the antenna group is an omni-directional antenna.
The technical personnel in the field can understand that the omnidirectional antenna is installed outside the multiband broadband wireless access equipment and used for transmitting and receiving signals of the multiband broadband wireless access equipment, the signals are uniformly radiated at 360 degrees on a horizontal directional diagram and have no directivity, and the antenna is set as the omnidirectional antenna, so that the multiband broadband wireless access system provided by the implementation has the advantages of lower cost and wider coverage range, and is more suitable for the requirement of near-distance communication.
Further, the antenna group is a directional antenna.
As can be understood by those skilled in the art, the directional antenna is installed outside the multiband broadband wireless access device, and is used for transmitting and receiving signals of the multiband broadband wireless access device, and the signals are radiated in a certain angle range on a horizontal directional pattern, namely, the directional antenna has directivity. The antenna group is set as a directional antenna, so that the frequency utilization rate of the multi-band broadband wireless access system provided by the implementation is higher, and the multi-band broadband wireless access system is more suitable for the communication requirement of long communication distance and small coverage area.
Further, the access device comprises a service access module.
Further, the access device includes a node management server module.
Further, the access device comprises a media gateway module and a media access module; the multi-band broadband access device, the media gateway module and the media access module are sequentially in communication connection.
As can be understood by those skilled in the art, the access device can selectively access the multiband broadband wireless access equipment, so that the utilization rate of a wireless network spectrum and the coverage of the network are improved.
Example two
As shown in fig. 1, the multiband broadband wireless access system provided in this embodiment includes an antenna group, a multiband broadband access device, and an access apparatus; the antenna group, the multi-band broadband access equipment and the access device are sequentially in communication connection.
It can be understood by those skilled in the art that, in the multi-band broadband wireless access system in the prior art, a single-band broadband access device is used, and when the system is used, a plurality of bands are in an idle state for a long time, so that the utilization rate of the bands is low. In the multi-band broadband wireless access system in the embodiment, because the multi-band broadband access device is used, the occupied frequency band can be flexibly adjusted according to the occupation situation of the current frequency band resource, when the authorized frequency spectrum resource is in an idle state, other devices use the idle frequency spectrum resource, not only occupy one frequency band, but also fully utilize the idle frequency spectrum resource, improve the utilization rate of the frequency spectrum resource, and be beneficial to the throughput of the mobile ad hoc network and the forwarding efficiency of the multi-hop service.
Further, the multi-band broadband access device comprises a radio frequency module and a baseband module; the antenna group, the radio frequency module, the baseband module and the access device are sequentially connected through a circuit.
As will be understood by those skilled in the art, the rf module is used for processing signals in different frequency bands, and the baseband module is used for controlling connection with the rf module. The multi-band broadband wireless access system provided by the embodiment can realize the configuration of a network management system through a communication network, and provides a unified and friendly multi-band configuration network management system, a multi-authority management user system, perfect multi-band frequency spectrum environment data and a stable frequency band switching function.
As shown in fig. 2, the baseband module includes a first rf connection port and a second rf connection port; the antenna group 1 comprises a first antenna and a second antenna; the radio frequency module comprises a first radio frequency unit, a second radio frequency unit, a first frequency band frequency conversion processing unit, a second frequency band frequency conversion processing unit, a first bidirectional power amplifier and a second bidirectional power amplifier; the first radio frequency connection port, the first radio frequency unit, the first frequency band frequency conversion processing unit, the first bidirectional power amplifier and the first antenna are sequentially in circuit connection; and the second radio frequency connection port, the second radio frequency unit, the second frequency band frequency conversion processing unit, the second bidirectional power amplifier and the second antenna are sequentially in circuit connection.
As will be understood by those skilled in the art, the first rf unit is configured to process the first band rf signal, and includes functions of amplifying a first band rf transmit signal (Power Amplifier, PA), amplifying a first band rf receive signal with Low Noise (LNA), and interacting baseband signals. The first frequency band frequency conversion processing unit is used for completing the frequency processing and other functions of a digital up-converter and a digital down-converter of the first frequency band radio frequency, and when the system supports the first frequency band, the frequency spectrum resource of the first frequency band can be selected and designed according to the first frequency band frequency conversion processing unit. The first bidirectional power amplifier is used for completing functions of radio frequency switching, power detection, power amplification, low noise amplification and the like.
The second rf unit is configured to process a second frequency band rf signal, and includes functions such as Power Amplifier (PA) for amplifying a second frequency band rf transmission signal, Low Noise Amplifier (LNA) for amplifying a second frequency band rf reception signal, and interaction of baseband signals. The second frequency band frequency conversion processing unit is used for completing the frequency processing and other functions of a digital up-converter and a digital down-converter of the second frequency band radio frequency, and when the system supports the second frequency band, the frequency spectrum resource of the second frequency band can be selected and designed according to the second frequency band frequency conversion processing unit. The second bidirectional power amplifier is used for completing the functions of radio frequency switching, power detection, power amplification, low noise amplification and the like.
Those skilled in the art can understand that the baseband module may further include a plurality of rf connection ports, such as a third rf connection port, a fourth rf connection port, etc.; the antenna group 1 further comprises a plurality of antennas, such as a third antenna and a fourth antenna; the radio frequency module can also comprise a plurality of radio frequency units such as a third radio frequency unit, a fourth radio frequency unit and the like; a plurality of multi-band frequency conversion processing units such as a third frequency band frequency conversion processing unit and a fourth frequency band frequency conversion processing unit, and a plurality of bidirectional power amplifiers such as a third bidirectional power amplifier and a fourth bidirectional power amplifier. The plurality of radio frequency connection ports, the plurality of antennas, the plurality of radio frequency units, the plurality of frequency band frequency conversion processing units, the plurality of bidirectional power amplifiers and the plurality of bidirectional power amplifiers are respectively and sequentially connected, so that a plurality of radio frequency circuit units are formed, and switching use of more frequency bands is realized. As can be understood by those skilled in the art, the radio frequency circuit units are too many, which may cause the system to be overloaded and the system to be too large, which is not favorable for portability, and so on, and thus the radio frequency circuit units of the multiband broadband wireless access system provided in this embodiment do not exceed 5 paths.
It is understood by those skilled in the art that each rf circuit unit processes the user information obtained from the control unit by the frequency conversion processing unit and the bidirectional power amplifier, and finally connects to the antenna through the rf cable for transmission to the remote end. When the antenna receives a far-end signal, the working frequency band is determined through software dynamic frequency identification, the signal enters a frequency conversion processing unit for down-conversion to a control unit through the low-noise amplification processing of a bidirectional power amplifier, and the original signal is recovered after the processing of the control unit.
Further, the baseband module further comprises a control unit, an interface processing unit and a power supply module; the interface processing unit and the power supply module are both in circuit connection with the control unit; the interface processing unit is respectively connected with the first radio frequency unit and the second radio frequency unit through a first radio frequency connection port and a second radio frequency connection port. One skilled in the art can understand that the interface processing unit may also implement circuit connection with multiple radio frequency units through other multiple radio frequency connection ports. It will be appreciated by those skilled in the art that the control unit is configured to perform control of the selection of the radio frequency band, calculation of the spatial interference algorithm, selection of the best route, and other functions. The interface processing unit completes the display of the state of the current use frequency, the storage of the state after the last use and the display of the working state of the equipment. The power supply module is used for completing the power supply function of the mainboard control unit, the radio frequency unit, the multi-band frequency conversion processing unit and the bidirectional power amplifier.
Further, the control unit includes a CPU processor, a Synchronous Dynamic Random Access Memory (SDRAM), and a NAND-flash memory; and the Synchronous Dynamic Random Access Memory (SDRAM) and the NAND-flash memory are both connected with the CPU processor circuit.
Furthermore, the control unit also comprises peripheral circuits such as a device state display circuit, an I/O port circuit and the like so as to realize the expanded connection of the display device and other external devices.
As shown in fig. 3, the first rf connection port and the second rf connection port are Mini PCI ports or Mini PCI-E ports.
Further, the CPU processor adopts an MPC8544 processor chip.
Those skilled in the art will appreciate that the MPC8544 processor chip has a flexible SOC platform with a built-in Power Architecture technology based e500v2 core and a large capacity 256Kb L2 cache, and is configured with two integrated 10/100/1000 ethernet controllers with SMGII interfaces and 3 PCI Express ports to provide various high speed connectivity.
EXAMPLE III
As shown in fig. 1, the multiband broadband wireless access system provided in this embodiment includes an antenna group, a multiband broadband access device, and an access apparatus; the antenna group, the multi-band broadband access equipment and the access device are sequentially in communication connection.
It can be understood by those skilled in the art that, in the multi-band broadband wireless access system in the prior art, a single-band broadband access device is used, and when the system is used, a plurality of bands are in an idle state for a long time, so that the utilization rate of the bands is low. In the multi-band broadband wireless access system in the embodiment, because the multi-band broadband access device is used, the occupied frequency band can be flexibly adjusted according to the occupation situation of the current frequency band resource, when the authorized frequency spectrum resource is in an idle state, other devices use the idle frequency spectrum resource, not only occupy one frequency band, but also fully utilize the idle frequency spectrum resource, improve the utilization rate of the frequency spectrum resource, and be beneficial to the throughput of the mobile ad hoc network and the forwarding efficiency of the multi-hop service.
Further, the multi-band broadband access device comprises a radio frequency module and a baseband module; the antenna group, the radio frequency module, the baseband module and the access device are sequentially connected through a circuit.
As will be understood by those skilled in the art, the rf module is used for processing signals in different frequency bands, and the baseband module is used for controlling connection with the rf module. The multi-band broadband wireless access system provided by the embodiment can realize the configuration of a network management system through a communication network, and provides a unified and friendly multi-band configuration network management system, a multi-authority management user system, perfect multi-band frequency spectrum environment data and a stable frequency band switching function.
As shown in fig. 2, the baseband module includes a first rf connection port and a second rf connection port; the antenna group 1 comprises a first antenna and a second antenna; the radio frequency module comprises a first radio frequency unit, a second radio frequency unit, a first frequency band frequency conversion processing unit, a second frequency band frequency conversion processing unit, a first bidirectional power amplifier and a second bidirectional power amplifier; the first radio frequency connection port, the first radio frequency unit, the first frequency band frequency conversion processing unit, the first bidirectional power amplifier and the first antenna are sequentially in circuit connection; and the second radio frequency connection port, the second radio frequency unit, the second frequency band frequency conversion processing unit, the second bidirectional power amplifier and the second antenna are sequentially in circuit connection.
As will be understood by those skilled in the art, the first rf unit is configured to process the first band rf signal, and includes functions of amplifying a first band rf transmit signal (Power Amplifier, PA), amplifying a first band rf receive signal with Low Noise (LNA), and interacting baseband signals. The first frequency band frequency conversion processing unit is used for completing the frequency processing and other functions of a digital up-converter and a digital down-converter of the first frequency band radio frequency, and when the system supports the first frequency band, the frequency spectrum resource of the first frequency band can be selected and designed according to the first frequency band frequency conversion processing unit. The first bidirectional power amplifier is used for completing functions of radio frequency switching, power detection, power amplification, low noise amplification and the like.
The second rf unit is configured to process a second frequency band rf signal, and includes functions such as Power Amplifier (PA) for amplifying a second frequency band rf transmission signal, Low Noise Amplifier (LNA) for amplifying a second frequency band rf reception signal, and interaction of baseband signals. The second frequency band frequency conversion processing unit is used for completing the frequency processing and other functions of a digital up-converter and a digital down-converter of the second frequency band radio frequency, and when the system supports the second frequency band, the frequency spectrum resource of the second frequency band can be selected and designed according to the second frequency band frequency conversion processing unit. And the second bidirectional power amplifier is used for completing the functions of radio frequency switching, power detection, power amplification, low noise amplification and the like.
Those skilled in the art can understand that the baseband module may further include a plurality of rf connection ports, such as a third rf connection port, a fourth rf connection port, etc.; the antenna group 1 further comprises a plurality of antennas, such as a third antenna and a fourth antenna; the radio frequency module can also comprise a plurality of radio frequency units such as a third frequency band radio frequency unit, a fourth frequency band radio frequency unit and the like; a plurality of multi-band frequency conversion processing units such as a third frequency band frequency conversion processing unit and a fourth frequency band frequency conversion processing unit, and a plurality of bidirectional power amplifiers such as a third bidirectional power amplifier and a fourth bidirectional power amplifier. The plurality of radio frequency connection ports, the plurality of antennas, the plurality of radio frequency units, the plurality of frequency conversion processing units, the plurality of bidirectional power amplifiers and the plurality of bidirectional power amplifiers are respectively connected in sequence, so that a plurality of radio frequency circuit units are formed, and switching use of more frequency bands is realized. As can be understood by those skilled in the art, the radio frequency circuit units are too many, which may cause the system to be overloaded and the system to be too large, which is not favorable for portability, and so on, and thus the radio frequency circuit units of the multiband broadband wireless access system provided in this embodiment do not exceed 5 paths.
It is understood by those skilled in the art that each rf circuit unit processes the user information obtained from the control unit by the frequency conversion processing unit and the bidirectional power amplifier, and finally connects to the antenna through the rf cable for transmission to the remote end. When the antenna receives a far-end signal, the working frequency band is determined through software dynamic frequency identification, the signal enters a frequency conversion processing unit for down-conversion to a control unit through the low-noise amplification processing of a bidirectional power amplifier, and the original signal is recovered after the processing of the control unit.
As shown in fig. 4, the radio frequency unit includes a wireless transceiver having a transmitting port, a receiving port, and a control signal transmitting port, a band pass filter, a power amplifier, a low pass filter, a transmit/receive switch, and a low noise amplifier; the receiving and dispatching switcher is provided with a first switching port, a second switching port and a control signal receiving port; the transmitting port, the band-pass filter, the power amplifier, the low-pass filter and the first switching port of the wireless transceiver are sequentially connected through a circuit; the second switching port, the low noise amplifier and the receiving port of the wireless transceiver are sequentially in circuit connection; and the control signal sending port of the wireless transceiver is in circuit connection with the control signal receiving port of the transceiving switcher.
As will be understood by those skilled in the art, the radio frequency unit mainly completes transmission and reception of radio signals, and when transmitting signals, the radio transceiver itself directly outputs low-power weak radio frequency signals, and sends the weak radio frequency signals to the power amplifier for power amplification, and then the weak radio frequency signals are transmitted to the space through the antenna or sent to the frequency conversion processing unit through the transceiver switch. When receiving signals, the antenna can sense electromagnetic signals in the space, and the electromagnetic signals are sent to the low-noise amplifier for amplification through the switcher, so that the amplified signals can be directly sent to the transceiver for processing and demodulation.
Further, the first radio frequency unit and the second radio frequency unit respectively adopt any two radio frequency board cards of 340MHz, 770MHz, 2.4GHz or 5.8 GHz.
Those skilled in the art can understand that the plurality of radio frequency units provided in this embodiment may further adopt a plurality of radio frequency boards in the other two or more frequency bands.
Those skilled in the art can understand that the 340MHz radio frequency board card adopts an Atheros chipset; the 770MHz radio frequency board card adopts an AR5414 chip set; the 2.4GHz radio frequency board card adopts an AR9220 chip set; the 5.8GHz radio frequency board card adopts an AR9590 chip set. Those skilled in the art can understand that the key protocol part of the industry-oriented application multi-band broadband wireless access system is implemented in a kernel module mode of an operating system, and the system adopts an OpenWrt operating system. OpenWrt is a highly modular and highly automated embedded Linux system with powerful network components and extensibility. And according to different radio frequency chip sets adopted by the radio frequency board card, the Openwrt operating system adopts different driving programs. The architecture of the driver uses a mac80211+ ath5k (ath9k, ath10k) mode, the protocol part is completely integrated in the mac80211, the flexibility is high, and the self-owned data link layer protocol can be selected and realized to better complete the target.
Those skilled in the art will appreciate that there are three types of drivers for Atheros' wireless modules, Ath5k, Ath9k, and Ath10k, respectively. Ath5k is a completely free/open source software wireless driver that is based on the Linux kernel in the wireless chipset AR5xxx version. Meanwhile, the driver supports 802.11abg, is only relevant to a chip and is not relevant to firmware. The working modes are as follows: client station mode, point-to-point (Ad-Hoc) mode, Mesh (Mesh) node mode, access point mode, 5/10M bandwidth, Turbo mode. Ath9k is a completely free/open source software wireless driver based on IEEE 802.11n Wireless driver PCI/PCI-express and AHB WLAN based chipset. The working modes are as follows: CLIENT mode, Wireless Access Point (AP) mode, Independent Basic Service Set (IBSS) mode, listening mode, Mesh (Mesh) mode (supporting high bandwidth), Wireless Distribution System (WDS) mode, P2P GO/CLIENT. Ath10k is a new mac80211 wireless driver designed for chips of the US high-throughput creation of sharp communications QCA988x family, which supports IEEE 802.11 ac.
The technical personnel in the field can understand that the multi-band broadband wireless access system communication configuration network management system applied to the industry can provide a unified interface-friendly multi-band configuration network management system, a multi-authority management user system, perfect multi-band frequency spectrum environment data and a stable frequency band switching function.
The network management interface mainly comprises: a LOG-in interface, a basic setting interface (IP and gateway address), a wireless setting interface (frequency band selection: 340MHz/700MHz/2.4GHz/5.8GHz, multi-band wireless parameter modification: center frequency, frequency bandwidth, grid (Mesh) identification, transmitting power, transmission rate and the like), a link monitoring interface (connected wireless equipment state, Ethernet interface state), information acquisition, processing and display of a multi-point system, user management, LOG (LOG) and LOG management.
Example four
As shown in fig. 1, the multiband broadband wireless access system provided in this embodiment includes an antenna group, a multiband broadband access device, and an access apparatus; the antenna group, the multi-band broadband access equipment and the access device are sequentially in communication connection.
It can be understood by those skilled in the art that, in the multi-band broadband wireless access system in the prior art, a single-band broadband access device is used, and when the system is used, a plurality of bands are in an idle state for a long time, so that the utilization rate of the bands is low. In the multi-band broadband wireless access system in the embodiment, because the multi-band broadband access device is used, the occupied frequency band can be flexibly adjusted according to the occupation situation of the current frequency band resource, when the authorized frequency spectrum resource is in an idle state, other devices use the idle frequency spectrum resource, not only occupy one frequency band, but also fully utilize the idle frequency spectrum resource, improve the utilization rate of the frequency spectrum resource, and be beneficial to the throughput of the mobile ad hoc network and the forwarding efficiency of the multi-hop service.
Further, the multi-band broadband access device comprises a radio frequency module and a baseband module; the antenna group, the radio frequency module, the baseband module and the access device are sequentially connected through a circuit.
As will be understood by those skilled in the art, the rf module is used for processing signals in different frequency bands, and the baseband module is used for controlling connection with the rf module. The multi-band broadband wireless access system provided by the embodiment can realize the configuration of a network management system through a communication network, and provides a unified and friendly multi-band configuration network management system, a multi-authority management user system, perfect multi-band frequency spectrum environment data and a stable frequency band switching function.
As shown in fig. 2, the baseband module includes a first rf connection port and a second rf connection port; the antenna group 1 comprises a first antenna and a second antenna; the radio frequency module comprises a first radio frequency unit, a second radio frequency unit, a first frequency band frequency conversion processing unit, a second frequency band frequency conversion processing unit, a first bidirectional power amplifier and a second bidirectional power amplifier; the first radio frequency connection port, the first radio frequency unit, the first frequency band frequency conversion processing unit, the first bidirectional power amplifier and the first antenna are sequentially in circuit connection; and the second radio frequency connection port, the second radio frequency unit, the second frequency band frequency conversion processing unit, the second bidirectional power amplifier and the second antenna are sequentially in circuit connection.
As will be understood by those skilled in the art, the first rf unit is configured to process the first band rf signal, and includes functions of amplifying a first band rf transmit signal (Power Amplifier, PA), amplifying a first band rf receive signal with Low Noise (LNA), and interacting baseband signals. The first frequency band frequency conversion processing unit is used for completing the frequency processing and other functions of a digital up-converter and a digital down-converter of the first frequency band radio frequency, and when the system supports the first frequency band, the frequency spectrum resource of the first frequency band can be selected and designed according to the first frequency band frequency conversion processing unit. The first bidirectional power amplifier is used for completing functions of radio frequency switching, power detection, power amplification, low noise amplification and the like.
The second rf unit is configured to process a second frequency band rf signal, and includes functions such as Power Amplifier (PA) for amplifying a second frequency band rf transmission signal, Low Noise Amplifier (LNA) for amplifying a second frequency band rf reception signal, and interaction of baseband signals. The second frequency band frequency conversion processing unit is used for completing the frequency processing and other functions of a digital up-converter and a digital down-converter of the second frequency band radio frequency, and when the system supports the second frequency band, the frequency spectrum resource of the second frequency band can be selected and designed according to the second frequency band frequency conversion processing unit. And the second bidirectional power amplifier is used for completing the functions of radio frequency switching, power detection, power amplification, low noise amplification and the like.
Those skilled in the art can understand that the baseband module may further include a plurality of rf connection ports, such as a third rf connection port, a fourth rf connection port, etc.; the antenna group 1 further comprises a plurality of antennas, such as a third antenna and a fourth antenna; the radio frequency module can also comprise a plurality of radio frequency units such as a third radio frequency unit, a fourth radio frequency unit and the like; a plurality of multi-band frequency conversion processing units such as a third frequency conversion processing unit and a fourth frequency conversion processing unit, and a plurality of bidirectional power amplifiers such as a third bidirectional power amplifier and a fourth bidirectional power amplifier. The plurality of radio frequency connection ports, the plurality of antennas, the plurality of radio frequency units, the plurality of frequency conversion processing units, the plurality of bidirectional power amplifiers and the plurality of bidirectional power amplifiers are respectively connected in sequence, so that a plurality of radio frequency circuit units are formed, and switching use of more frequency bands is realized. As can be understood by those skilled in the art, the radio frequency circuit units are too many, which may cause the system to be overloaded and the system to be too large, which is not favorable for portability, and so on, and thus the radio frequency circuit units of the multiband broadband wireless access system provided in this embodiment do not exceed 5 paths.
It is understood by those skilled in the art that each rf circuit unit processes the user information obtained from the control unit by the frequency conversion processing unit and the bidirectional power amplifier, and finally connects to the antenna through the rf cable for transmission to the remote end. When the antenna receives a far-end signal, the working frequency band is determined through software dynamic frequency identification, the signal enters a frequency conversion processing unit for down-conversion to a control unit through the low-noise amplification processing of a bidirectional power amplifier, and the original signal is recovered after the processing of the control unit.
As shown in fig. 5, the bidirectional power amplifier includes a power supply 2, a first single-pole double-throw switch 3, a second single-pole double-throw switch 4, a first low noise amplifier 5, a second low noise amplifier 6, a power combining circuit 7, a first power amplifier 8, a second power amplifier 9, an attenuation chip 10, a directional coupler 11, and a transmission/reception switching control circuit 12; the power supply 2 is connected with a first end of a first single-pole double-throw switch 3, a second end of the first single-pole double-throw switch 3, a first low noise amplifier 5, a second low noise amplifier 6, a second end of a second single-pole double-throw switch 4, a third end of the second single-pole double-throw switch 4, an attenuation chip 10, a first power amplifier 8, a second power amplifier 9 and a power synthesis circuit 7 which are connected in parallel are sequentially connected to form a loop, and a first end of the second single-pole double-throw switch 4 is connected with a transceiving switching control circuit 12.
As can be understood by those skilled in the art, the selection of the bidirectional power amplifier units of different frequency bands is a complex process, and in the actual selection process, several parameters are involved as follows: the signal Power amplifier comprises a working frequency, a small signal gain, a maximum linear output Power, a 1dB compression point output Power, an Error Vector Magnitude (EVM), an Adjacent Channel Power Ratio (ACPR), a noise coefficient, a built-in Power detection function, a built-in gain control function, a Power supply voltage and a consumed current.
EXAMPLE five
As shown in fig. 6, the present embodiment provides a multiband broadband wireless access method, including the following steps:
s1 is a step of scanning the frequency band signal in a set period;
as can be understood by those skilled in the art, the multiband broadband wireless access system provided in the first to fourth embodiments scans the first frequency band and the second frequency band in which the multiband broadband wireless access system operates, so as to monitor the band signals.
S2 is a step for processing the frequency band signal;
s3 is used for analyzing the processed signals and obtaining parameter information;
s4 a step of comparing the analyzed information;
and S5 is used for switching the frequency band according to the compared information.
It can be understood by those skilled in the art that the present embodiment uses a multiband broadband wireless access system having two frequency bands to implement the process of switching two devices from one frequency band to another frequency band in case of interference.
Further, the step S1 is configured to perform signal scanning in the working frequency band according to a set period, and includes a transmission state scanning step of sending an announcement message according to a predefined direction sequence to detect a potential neighbor node; those skilled in the art will appreciate that the transmission state scanning step is used for active neighbor discovery.
Further, the step S1 is configured to perform signal scanning in the working frequency band according to the set period, and includes a monitoring state scanning step of monitoring the channel in each designated direction according to the set dwell time and waiting for receiving the notification message.
Further, the step of S2 processing the frequency band signal includes:
s21, amplifying the received signal by a bidirectional power amplifier;
s22, performing an up-conversion process on the amplified signal, as will be understood by those skilled in the art, the up-conversion process may be performed on the signal by a frequency conversion processing unit;
and S23, performing digital-to-analog conversion or analog-to-digital conversion on the frequency-converted signal.
Those skilled in the art will appreciate that the selection of the bi-directional power amplifier requires consideration of the following parameters: the Power amplifier comprises an operating frequency, a small signal gain, a maximum linear output Power, a 1dB compression point output Power, an Error Vector Magnitude (EVM), an Adjacent Channel Power Ratio (ACPR), a noise coefficient, a built-in Power detection function, a built-in gain control function, a Power supply voltage and a consumed current.
Further, the step of S3 for analyzing the processed signal and acquiring parameter information includes:
a channel idle analysis step, which is used for obtaining channel idle parameter information; or the like, or, alternatively,
a signal-to-noise ratio analysis step for acquiring signal-to-noise ratio parameter information; or the like, or, alternatively,
a level intensity analyzing step for acquiring level intensity parameter information; or the like, or, alternatively,
and a channel quality evaluation step for obtaining channel quality evaluation parameter information.
Those skilled in the art will appreciate that the channel quality assessment relates to information such as channel usage, operating channel quality, rate, bandwidth capacity, and currently occupied bandwidth. The analysis means can be realized by establishing a corresponding frequency parameter information table. It can be understood by those skilled in the art that the step of S3 for analyzing the processed signal includes using a baseband module of the multiband broadband wireless access system according to the first to fourth embodiments.
Further, the step of S4 comparing the analyzed information includes:
s41 is used for generating a channel information statistical table according to the parameter information;
s42 step for analyzing and sampling the parameter information and generating performance priority information table of each frequency band
And S43, calculating the value of the CIP (Channel Interface Processor) of each frequency band through the performance priority information table of each frequency band, and comparing and determining the optimal frequency point.
Those skilled in the art will understand that the step of S4 for comparing the analyzed information is implemented by a baseband module. The step of S5 for switching frequency bands according to the compared information can be implemented by the transceiver switch of the multiband broadband wireless access system according to the first to the fourth embodiments.
EXAMPLE six
As shown in fig. 7, the present embodiment provides a multiband broadband wireless access method, including a wireless dynamic band selection and allocation step, which specifically includes:
s1 is used for detecting the link quality and generating the step of the testing result;
s2 is used for detecting whether there is a step that the authorized user is using in the current frequency band, if the detection result is that there is the authorized user, the signal transmission is stopped;
s3 switches the current operating frequency to the frequency with the least interference intensity.
The multiband broadband wireless access system provided by the embodiment has the following system indexes: frequency range: 336MHz to 344MHz, 763MHz to 778MHz, 2412MHz to 2472MHz, and 5150MHz to 5850MHz, network data theoretical throughput: 300Mbps, a Frame Error Rate (FER) of data (at a Rate of 54 Mbps) is less than 10%, a lowest receiving level of a network area is greater than-70 dBm, a signal-to-noise ratio (S/N) of a wireless signal (spread spectrum) is greater than 20dB, a minimum receiver threshold level is-90 dBm, a maximum receiver threshold level is-8 dB, a point-to-point distance of equipment is less than or equal to 3KM, the hop count of the equipment is greater than 20, and a working environment temperature: -20 ℃ to +55 ℃, protection grade: IP 67.
EXAMPLE seven
The embodiment provides a multiband broadband wireless access method, which comprises the following steps:
the method comprises the steps that information transmission between a first equipment node and a second equipment node is achieved through a first frequency;
the information transmission between the second equipment node and the third equipment node is realized by adopting a second frequency;
the first frequency and the second frequency have different values.
It can be understood by those skilled in the art that when there are infinite device nodes, infinite expansion of the hop count can be achieved through the above method, so that lossless link data bandwidth is guaranteed while multi-hop backhaul of data is achieved. Those skilled in the art can understand that if a single-frequency multi-hop wireless access mode is used, the data bandwidth of a link is attenuated 1/3-1/2 once per multi-hop, and according to the calculation, the transmission delay possibly generated after the 6 th hop of the system exceeds the response time of a data packet, so that the network response failure cannot be continued to transmit, and meanwhile, problems of transmission delay and data packet response time of different degrees are generated, some systems are generated after the 5 th hop, and some systems are generated at the 3 rd hop and the 4 th hop. When the problems of transmission delay and data packet response time occur, the system bandwidth and the stability of wireless transmission are seriously affected, and finally, the connection failure of the terminal and the interruption of the wireless connection can be caused. The multi-band broadband wireless access method provided by the embodiment adopts a frequency interval data return mode, so that the problem of the limitation of the hop count is well overcome, the system bandwidth cannot be reduced due to the increase of the hop count, and the stability of wireless connection cannot be reduced due to the increase of the hop count.
It can be understood by those skilled in the art that, by adopting the above technical solution, the channel quality of the wireless communication channel with multiple frequencies mounted on the multiband broadband wireless access system provided in this embodiment is estimated, and then an optimal wireless transmission channel is selected according to the estimation result to perform data transmission, so as to obtain the maximum transmission bandwidth for implementing wireless transmission in the existing environment, and complete access of the channel, thereby implementing an application requiring remote transmission in an environment with wireless channel interference or channel resource shortage, and being suitable for an application having certain requirements on transmission distance and transmission quality. The system can provide vehicle-mounted mobile network service for urban hot spots and various disaster occurrence sites under emergency conditions. Meanwhile, the system can meet the communication requirements of special communication fields such as target ranges, maritime affairs and the like, and comprises various complex topological structures.
The technical personnel in the field can understand that the multi-band broadband wireless Access system and the multi-band broadband wireless Access method thereof have the advantages of wide coverage range, strong expandability and flexible networking, can utilize Time Division Multiple Access (TDMA) technology, flexibly and effectively establish a wireless network for users, provide the requirements of covering blind spots or emergency communication services according to different environments, and can provide various advanced applications for the military field.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. A multi-band broadband wireless access method is characterized by comprising the following steps:
s1 is a step of scanning the frequency band signal in a set period;
s2 is a step for processing the frequency band signal;
s3 is used for analyzing the processed signal and acquiring parameter information;
s4 a step of comparing the analyzed information;
s5 is used for switching the frequency band through the compared information; the step of S2 processing the frequency band signal includes:
s21, amplifying the received signal by a bidirectional power amplifier;
s22, carrying out up-conversion processing on the amplified signal;
and S23, performing digital-to-analog conversion or analog-to-digital conversion on the frequency-converted signal.
2. The multiband broadband wireless access method of claim 1, wherein the step of S3 for analyzing the processed signal and for obtaining parameter information comprises:
a channel idle analysis step, which is used for obtaining channel idle parameter information; or the like, or, alternatively,
a signal-to-noise ratio analysis step for acquiring signal-to-noise ratio parameter information; or the like, or, alternatively,
a level intensity analyzing step for acquiring level intensity parameter information; or the like, or, alternatively,
and a channel quality evaluation step for obtaining channel quality evaluation parameter information.
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| CN111355542B (en) * | 2018-12-20 | 2022-03-04 | 重庆金山医疗技术研究院有限公司 | Self-adaptive method and transmission system for image information transmission frequency of capsule endoscope |
| CN109981133B (en) * | 2019-03-26 | 2020-09-11 | 四方智能(武汉)控制技术有限公司 | Unmanned marine wireless broadband radio station |
| CN110705450B (en) * | 2019-09-27 | 2023-02-07 | 理工全盛(北京)科技有限公司 | Passive unmanned aerial vehicle detection device |
| CN111262597A (en) * | 2020-01-17 | 2020-06-09 | 深圳市普威技术有限公司 | Novel radio frequency device, radio frequency device control method and wireless equipment |
| WO2021223121A1 (en) * | 2020-05-06 | 2021-11-11 | 深圳市大疆创新科技有限公司 | Bidirectional multi-frequency amplifier, transceiver, control method and storage medium |
| CN112073284B (en) * | 2020-08-21 | 2022-06-03 | 河南恒茂创远科技股份有限公司 | Star networking method for biological signal sensor and collector |
| CN112217535A (en) * | 2020-09-29 | 2021-01-12 | 西安博瑞集信电子科技有限公司 | Multi-mode radio frequency front-end integrated chip and working method |
| CN112312149B (en) * | 2020-10-19 | 2023-04-07 | 青岛儒海船舶工程有限公司 | Audio and video remote transmission system for ship maintenance |
| CN112272030B (en) * | 2020-10-26 | 2022-07-08 | Oppo广东移动通信有限公司 | Radio frequency front end module, radio frequency assembly and electronic equipment |
| CN112821874B (en) * | 2020-12-30 | 2022-10-28 | Oppo（重庆）智能科技有限公司 | Compression point adjusting method and device and power amplifier power supply circuit |
| CN112769611B (en) * | 2020-12-30 | 2023-10-27 | 凌云天博光电科技股份有限公司 | Method and system for configuring working frequency band of home network |
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