CN107872901B

CN107872901B - Device for improving access point coverage depth and breadth based on LTE network

Info

Publication number: CN107872901B
Application number: CN201711120530.XA
Authority: CN
Inventors: 何劲财; 陈剑辉
Original assignee: Ankexun Fujian Technology Co ltd
Current assignee: Ankexun Fujian Technology Co ltd
Priority date: 2014-08-22
Filing date: 2014-08-22
Publication date: 2021-06-01
Anticipated expiration: 2034-08-22
Also published as: CN107889279A; CN104159325A; CN107889278B; CN104159325B; CN107889281B; CN107872901A; CN107889279B; CN107889280B; CN107889281A; CN107889278A; CN107889280A

Abstract

The invention provides a WLAN outdoor wireless access point device based on an LTE network, which comprises: the system comprises a system-level processor, a signal coverage selection unit, a power supply module and a processor peripheral circuit unit; the system-level processor is connected to an LTE wireless network card and a plurality of WLAN transceivers in an expansion mode through two PCIE expansion bridge chips by the central processing unit to form a complete data bearing link; the signal coverage selection unit consists of a CPLD logic controller, a radio frequency transceiving link, a control circuit and a corresponding antenna array; the signal coverage selection unit is controlled by the instruction of the central processing unit to obtain self-adaptive signal coverage; the power supply module provides power for the device; the processor peripheral circuit unit is used for receiving and transmitting data or storing data. The invention realizes intelligent coverage of self-adaptive signal optimal path selection, improves the anti-interference capability of electromagnetic waves, and increases the sensitivity of received signals and the quality of coverage signals.

Description

Device for improving access point coverage depth and breadth based on LTE network

The application is a divisional application of a parent application named as 'a WLAN outdoor wireless access point device based on an LTE network' with the application number of 201410416155.3 and the application date of 20140822.

Technical Field

The invention relates to the technical field of communication equipment, in particular to a WLAN outdoor wireless access point device based on an LTE network.

Background

With the development of mobile internet, the demand of end users for data services has increased explosively. Compared with the development of the traditional internet, the mobile internet has skipped over the primary stage of the development of the internet and enters the era of 'application is king and content is up'.

Just as the application is the leading of the king, the development of the mobile internet puts higher and higher requirements on broadband services, so the development of the TD-LTE is also extremely rapid. In some areas, the development speed of wireless networks even exceeds the development of WIFI wireless coverage; compared with the current situation that WIFI becomes standard equipment of each intelligent terminal, in the initial stage of industrialization, the terminal development of LTE is relatively lagged, and the large-scale commercial application still needs certain technology accumulation, so that certain mutual opposition exists.

In view of the rapid popularization of WiFi products, the spectrum resource of the 2.4G band is more and more valuable. Due to the complicated terrain, the influence of obstacles on electromagnetic wave transmission and the mutual influence among a large number of users, the electromagnetic wave can generate time delay diffusion, Rayleigh fading, multipath effect, co-channel interference and the like, so that the communication quality is seriously influenced, and the coverage area of a single WiFi product is limited. At present, the traditional AP simply adopts a high-gain antenna, so that the problems existing in the application can not be solved, and the requirement for developing the application can not be met.

The application document develops a mode of adopting an LTE network as uplink data bearing, can make full use of LTE network resources to carry out WIFI wireless coverage, solves the existing problems, and further widens the use scene of wireless access equipment. The method can be widely applied to WIFI coverage such as emergency communication, rural coverage and high-speed mobile scenes. And intelligent coverage of self-adaptive signal optimal path selection is realized, the anti-interference capability of electromagnetic waves is improved, and the sensitivity of received signals and the quality of coverage signals are increased.

The first patent is as follows: in the prior art, "a WLAN switching method and device under LTE-WLAN internetworking" is disclosed, which is disclosed as CN102984773A, and the publication date is: 2013.03.20, the wireless terminal or the mobile node can complete the communication switching from the current WLAN hotspot to any target WLAN hotspot under any condition by three methods of switching communication from the current WLAN hotspot to any target WLAN hotspot, switching communication from the next WLAN hotspot most likely to be switched to the current WLAN hotspot, and switching communication from the current WLAN hotspot to any target WLAN hotspot through the LTE network, thereby effectively ensuring that data transmission is never interrupted during the switching process, and ensuring QOS and network throughput.

Patent II: in the prior art, "an interconnection system and a handover method for LTE and WLAN" are disclosed, which are disclosed as follows: 101841880A, published as: 2010-09-22, the system introduces an entity of a virtual base station under an LTE architecture, and uses the entity as an interface for WLAN access to LTE. On the LTE side, the virtual base station remains transparent to the LTE side, and has the functions of a general LTE base station. On the WLAN side, the virtual base station may control the WLAN access point. The switching between the LTE and the WLAN is realized through the virtual base station, and the switching between the LTE and the WLAN adopts a standard X2 interface to realize a switching process. And a second layer tunneling protocol or an Ethernet tunneling protocol is adopted between the virtual base station and the WLAN access point to realize the receiving and sending of data and signaling in the switching process, and the WLAN is used as a bottom layer transmission channel of the data and the signaling of the LTE system. The method has the advantages that for LTE, the switching process is consistent with the LTE switching process, and the influence on the existing LTE is small. The WLAN is connected to the LTE in a tight coupling mode, the service quality requirement for the WLAN can be met to a greater extent, the time delay caused by system switching is reduced, and the system performance is ensured.

And (3) patenting: in the prior art, "a device for realizing a multi-beam intelligent antenna by using a directional antenna" is disclosed as follows: 200969585, publication date is: in the chinese patent 2007-10-31, the device comprises a layered antenna array composed of mutually independent N-face directional antennas, an antenna selection unit, a coprocessor unit, a main processor; the N-face directional antenna is respectively connected with the input end of the coprocessor unit, the output end of the coprocessor is respectively connected with the antenna selection unit and the main processor, and the output end of the main processor is respectively connected with the antenna selection unit and the base station. The utility model discloses a have simple structure, compatible ability is strong, and the cross correlation is little between the antenna, and interference suppression ability is strong, and basic station coverage is big, and electromagnetic wave pollutes for a short time, and basic station power is low, and power control is easy, and the group battle array mode is nimble, and the telephone traffic balancing ability is strong, communication capacity advantage such as big. The utility model is suitable for 3G system, 2G GSM system and future 4G system and WLAN, PHS and other communication systems.

The type described in the above patent i and patent ii is network handover between LTE and WIFI coverage, and the present document describes a WIFI wireless access point device that can be based on LTE network data bearer.

The third patent mainly solves the problems that the cross correlation between the antennas is small, the interference suppression capability is strong, and the wifi scene is limited and the like caused by the problems of link resources and characteristics.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a WLAN outdoor wireless access point device based on an LTE network, which realizes intelligent coverage of adaptive signal optimal path selection, improves the anti-interference capability of electromagnetic waves, and increases the sensitivity of received signals and the quality of coverage signals.

The invention is realized by the following steps: a WLAN outdoor wireless access point apparatus based on an LTE network, the apparatus comprising: the system comprises a system-level processor, a signal coverage selection unit, a power supply module and a processor peripheral circuit unit; the system-level processor is connected to an LTE wireless network card and a plurality of WLAN transceivers in an expansion mode through two PCIE expansion bridge chips by the central processing unit to form a complete data bearing link; the signal coverage selection unit consists of a CPLD logic controller, a radio frequency transceiving link, a control circuit and a corresponding antenna array; the signal coverage selection unit is controlled by the instruction of the central processing unit to obtain self-adaptive signal coverage; the power supply module provides power for the device; the processor peripheral circuit unit is used for receiving and transmitting data or storing data;

the system-level processor is connected to an operator core network through an LTE wireless network card, and after the LTE wireless network card receives signals, data streams are forwarded to the central processor through the PCIE expansion bridge chip; the central processing unit passes through the PCIE expansion bridge chip according to the processing result of the signal coverage selection unit, the data stream is modulated into a radio frequency signal by the WLAN transceiver, and the radio frequency signal is sent out through the radio frequency transceiving link and the control circuit after being selected preferentially and the corresponding antenna array, so that a complete signal coverage flow is formed.

Further, the system-level processor comprises: the system comprises a central processing unit, 2 paths of PCIE expansion bridge chips, 5 paths of WLAN transceivers and an LTE wireless network card; the LTE wireless network card is connected with an LTE antenna, and the central processing unit comprises two PCIE interfaces; the PCIE interface of the LTE wireless network card and the first PCIE interface of the central processing unit are both connected with the first PCIE expansion bridge piece of the 2-path PCIE expansion bridge piece, and the second PCIE interface of the central processing unit is connected with the second PCIE expansion bridge piece; the first PCIE expansion bridge chip is connected with 3 WLAN transceivers, and the second PCIE expansion bridge chip is connected with 2 WLAN transceivers; the LTE wireless network card is used as an uplink data bearing link, and data is connected with an LTE coverage network access core network through the LTE wireless network card and a matched LTE antenna; the downlink coverage link consists of 5 paths of WLAN transceivers, and the WLAN transceivers are internally provided with a WLAN baseband processing module and a radio frequency transceiving module to realize coverage of WIFI signals and processing of the signals; the central processing unit reads, filters packets, forwards and processes corresponding network management aiming at the data stream input by each PCIE interface; forming a complete data transmission link.

Further, the signal coverage selection unit aims to realize the selection of the optimal coverage path of the user signal; the signal coverage selection unit comprises a CPLD logic controller and a single-stream signal coverage unit; the single-flow signal covering unit comprises a radio frequency transceiving link and a control circuit, a Butler matrix and a 4 x 4 combined antenna array which are sequentially connected; the 5-path WLAN transceiver and the CPLD logic controller are both connected with a radio frequency transceiving link and a control circuit, the single-flow signal covering unit realizes the covering of 4 narrow beams, the radio frequency transceiving link and the control circuit consist of 4 pairs of transceiving links which are in one-to-one correspondence to the 4-path WLAN transceivers, the transceiving links can be opened and closed at will through the CPLD logic controller, and 1 path in the 5-path WLAN transceivers is used as a main WLAN transceiver, so that the CPLD logic controller controls the transceiving signals to be switched to 4 pairs of transceiving links for covering, and the main WLAN transceiver can monitor the data of each WLAN transceiver according to requirements and can carry out broadcast signal covering through each 4-path WLAN transceiver; signals from the radio frequency transceiving link are sent into a Butler matrix, the Butler matrix adjusts the amplitude of the signals into 4 different phases required, and narrow beams in 4 different covering directions are formed after different phases of the antenna array are superposed; the coverage of each narrow beam is formed by all 4 x 4 antenna arrays; the central processor selects the radio frequency transceiving link preferentially according to the control CPLD logic controller, and self-adaptive user optimal coverage selection is realized.

Further, the processor peripheral circuit unit includes: the device comprises a first memory device, a second memory device, a flash memory, an RS232 transceiver, an Ethernet transceiver and a lightning protection module; the RS232 transceiver is respectively connected with the first memory, the second memory, the flash memory and a UART interface of the central processing unit; the Ethernet transceiver is respectively connected with the first memory, the second memory, the flash memory, the RGMII interface of the central processing unit and the lightning protection module; the first internal memory, the second internal memory and the flash memory are used for storing various data of programs and 820.11 protocols; the RS232 transceiver is used for operating and monitoring the central processing unit; the Ethernet transceiver is connected to the central processor through the RGMII interface, and data exchange is carried out through the RGMII interface protocol.

Furthermore, the device can carry out an electric transmission mode through an Ethernet transceiver except for adopting an LTE network as data bearing.

Furthermore, the power module adopts five types of wires for remote feeding, and provides a stable and reliable direct-current power supply for each circuit unit of the device.

The invention has the following advantages: compared with the traditional AP, the biggest difference of the invention is that an LTE wireless network can be used as a data bearing mode and an adaptive outdoor optimal coverage function. The multi-redundancy data bearing mode ensures that the equipment is not limited by link resources, thereby being convenient for WLAN networking coverage; for example, the application scenes of high-speed moving objects such as emergency communication equipment and trains, rural areas and the like are utilized fully, the LTE wireless network is utilized fully, and networking resources are saved.

The intelligent coverage can be self-adaptive to the coverage direction selection according to the use condition of the user, namely, the intelligent coverage is covered by the combined optimal narrow beam; the method has the advantages of improving the anti-interference capability, improving the user collision problem, improving the user capacity, enlarging the coverage, reducing the frequency use resources, simplifying networking installation, reducing the installation cost and the like.

As outdoor coverage equipment, the problem of node hiding by users is very serious because the users are far away from each other, the number of users is large, the collision probability among the users is very large, the more the collision is, the lower the efficiency of a base station is and the capacity of the users is reduced; when collision occurs, the user receives the collision signals through different beams and the receiver, and the collision signals can be processed in a time-sharing mode through an algorithm, so that the collision is reduced, and the whole user capacity is improved.

The signal covers through the narrow beam of dividing, and its energy is more concentrated, and the penetrating energy is stronger, can do the cover better to the user that shelters from, remote user, effectual improvement access point equipment's depth of coverage and width.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

Referring to fig. 1, a WLAN outdoor wireless access point device based on an LTE network according to the present invention includes: the system comprises a system-level processor, a signal coverage selection unit, a power supply module and a processor peripheral circuit unit; the system-level processor is connected to an LTE wireless network card and a plurality of WLAN transceivers in an expansion mode through two PCIE expansion bridge chips by the central processing unit to form a complete data bearing link; the signal coverage selection unit consists of a CPLD logic controller, a radio frequency transceiving link, a control circuit and a corresponding antenna array; the signal coverage selection unit is controlled by the instruction of the central processing unit to obtain self-adaptive signal coverage; the power supply module provides power for the device; the processor peripheral circuit unit is used for receiving and transmitting data or storing data;

the system level processor is connected to an operator core network through an LTE wireless network card, and the base station is accessed to the control manager for centralized management through the core network; after the LTE wireless network card receives the signal, the data stream is forwarded to the central processing unit through the PCIE expansion bridge chip; the central processing unit passes through the PCIE expansion bridge chip according to the processing result of the signal coverage selection unit, the data stream is modulated into a radio frequency signal by the WLAN transceiver, and the radio frequency signal is sent out through the radio frequency transceiving link and the control circuit after being selected preferentially and the corresponding antenna array, so that a complete signal coverage flow is formed. Similarly, the user data is accessed to the core network by referring to the direction of the sublink, thereby realizing the wireless network coverage of the WLAN.

In the present invention, the system-level processor comprises: the system comprises a central processing unit, 2 paths of PCIE expansion bridge chips, 5 paths of WLAN transceivers and an LTE wireless network card; the LTE wireless network card is connected with an LTE antenna, and the central processing unit comprises two PCIE interfaces; the PCIE interface of the LTE wireless network card and the first PCIE interface of the central processing unit are both connected with the first PCIE expansion bridge piece of the 2-path PCIE expansion bridge piece, and the second PCIE interface of the central processing unit is connected with the second PCIE expansion bridge piece; the first PCIE expansion bridge chip is connected with 2 WLAN transceivers, and the second PCIE expansion bridge chip is connected with 3 WLAN transceivers; the LTE wireless network card is used as an uplink data bearing link, and data is connected with an LTE coverage network access core network through the LTE wireless network card and a matched LTE antenna; the downlink coverage link consists of 5 paths of WLAN transceivers, and the WLAN transceivers are internally provided with a WLAN baseband processing module and a radio frequency transceiving module to realize coverage of WIFI signals and processing of the signals; the central processing unit reads, filters packets, forwards and processes corresponding network management aiming at the data stream input by each PCIE interface; forming a complete data transmission link.

The signal coverage selection unit aims at realizing the selection of the optimal coverage path of the user signal; the signal coverage selection unit comprises a CPLD logic controller and a single-stream signal coverage unit; in addition, the invention can develop double space flow and three space flow according to the corresponding requirement, and the single flow signal covering units with corresponding number are required to be added for increasing the space flow. The single-flow signal covering unit comprises a radio frequency transceiving link and a control circuit, a Butler matrix and a 4 x 4 combined antenna array which are sequentially connected; the 5-path WLAN transceiver and the CPLD logic controller are both connected with a radio frequency transceiving link and a control circuit, the single-flow signal covering unit realizes the covering of 4 narrow beams, the radio frequency transceiving link and the control circuit consist of 4 pairs of transceiving links which are in one-to-one correspondence to the 4-path WLAN transceivers, the transceiving links can be opened and closed at will through the CPLD logic controller, and 1 path in the 5-path WLAN transceivers is used as a main WLAN transceiver, so that the CPLD logic controller controls the transceiving signals to be switched to 4 pairs of transceiving links for covering, and the main WLAN transceiver can monitor the data of each WLAN transceiver according to requirements and can carry out broadcast signal covering through each 4-path WLAN transceiver; signals from the radio frequency transceiving link are sent into a Butler matrix, the Butler matrix adjusts the amplitude of the signals into 4 different phases required, and narrow beams in 4 different covering directions are formed after different phases of the antenna array are superposed; the coverage of each narrow beam is formed by all 4 x 4 antenna arrays; very high gain can be achieved, and the requirement of large-area coverage can be met. The central processor selects the radio frequency transceiving link preferentially according to the control CPLD logic controller, and self-adaptive user optimal coverage selection is realized.

The processor peripheral circuit unit includes: the device comprises a first memory device, a second memory device, a flash memory, an RS232 transceiver, an Ethernet transceiver and a lightning protection module; the RS232 transceiver is respectively connected with the first memory, the second memory, the flash memory and a UART interface of the central processing unit; the Ethernet transceiver is respectively connected with the first memory, the second memory, the flash memory, the RGMII interface of the central processing unit and the lightning protection module; the first internal memory, the second internal memory and the flash memory are used for storing various data of programs and 820.11 protocols; the RS232 transceiver is used for operating and monitoring the central processing unit; the Ethernet transceiver is connected to the central processor through the RGMII interface, and data exchange is carried out through the RGMII interface protocol. The device can carry out an electric transmission mode through an Ethernet transceiver except for adopting an LTE network as data bearing. The power module adopts five types of wires for remote feeding, and provides a stable and reliable direct-current power supply for each circuit unit of the device.

The invention can be used as an uplink data bearing mode based on an LTE network besides five types of wires and optical fibers, and solves the problem of limited wifi scenes caused by link resource and characteristic problems. The invention also introduces a multi-beam intelligent WLAN coverage technology, and can effectively improve the requirements of the existing WIFI wireless coverage network and the network deployment.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. An apparatus for improving the coverage depth and breadth of a WLAN wireless access point based on an LTE network, the apparatus comprising: the system comprises a system-level processor, a signal coverage selection unit and a processor peripheral circuit unit; the system-level processor is connected to an LTE wireless network card and a plurality of WLAN transceivers in an expansion mode through two PCIE expansion bridge chips by the central processing unit; the signal coverage selection unit consists of a CPLD logic controller, a radio frequency transceiving link, a control circuit and a corresponding antenna array; the signal coverage selection unit is controlled by the instruction of the central processing unit;

the WLAN transceiver has 5 paths; the signal coverage selection unit comprises a CPLD logic controller and a single-stream signal coverage unit; the single-flow signal covering unit comprises a radio frequency transceiving link and a control circuit, a Butler matrix and a 4 x 4 combined antenna array which are sequentially connected; the 5-path WLAN transceiver and the CPLD logic controller are both connected with a radio frequency transceiving link and a control circuit, the single-flow signal covering unit realizes the covering of 4 narrow beams, the radio frequency transceiving link and the control circuit are composed of 4 pairs of transceiving links and are in one-to-one correspondence to the 4-path WLAN transceiver, 1 path in the 5-path WLAN transceiver is used as a main WLAN transceiver, and the CPLD logic controller controls the switching of the transceiving signals to the 4 pairs of transceiving links for covering;

the processor peripheral circuit unit includes: the device comprises a first memory device, a second memory device, a flash memory, an RS232 transceiver, an Ethernet transceiver and a lightning protection module; the RS232 transceiver is respectively connected with the first memory, the second memory, the flash memory and a UART interface of the central processing unit; the Ethernet transceiver is respectively connected with the first memory, the second memory, the flash memory, the RGMII interface of the central processing unit and the lightning protection module;

the system-level processor is connected to an operator core network through an LTE wireless network card, and after the LTE wireless network card receives signals, data streams are forwarded to the central processor through the PCIE expansion bridge chip; the central processing unit passes through the PCIE expansion bridge chip according to the processing result of the signal coverage selection unit, the data stream is modulated into a radio frequency signal by the WLAN transceiver, and the radio frequency signal is sent out through the radio frequency transceiving link and the control circuit after being selected and the corresponding antenna array, so that a complete signal coverage flow is formed;

the system-level processor includes: the system comprises a central processing unit, 2 paths of PCIE expansion bridge chips, 5 paths of WLAN transceivers and an LTE wireless network card; the LTE wireless network card is connected with an LTE antenna, and the central processing unit comprises two PCIE interfaces; the PCIE interface of the LTE wireless network card and the first PCIE interface of the central processing unit are both connected with the first PCIE expansion bridge piece of the 2-path PCIE expansion bridge piece, and the second PCIE interface of the central processing unit is connected with the second PCIE expansion bridge piece; the first PCIE expansion bridge chip is connected with 2 WLAN transceivers, and the second PCIE expansion bridge chip is connected with 3 WLAN transceivers; the LTE wireless network card is used as an uplink data bearing link, and data is connected with an LTE coverage network access core network through the LTE wireless network card and a matched LTE antenna; the downlink coverage link consists of 5 paths of WLAN transceivers, and the WLAN transceivers are internally provided with a WLAN baseband processing module and a radio frequency transceiving module to realize coverage of WIFI signals and processing of the signals; the central processing unit reads, filters packets, forwards and processes corresponding network management aiming at the data stream input by each PCIE interface; forming a complete data transmission link.

2. The apparatus of claim 1 for improving the coverage depth and breadth of WLAN wireless access points based on LTE network, wherein: the device can carry out an electric transmission mode through an Ethernet transceiver except for adopting an LTE network as data bearing.

3. The apparatus of claim 1 for improving the coverage depth and breadth of WLAN wireless access points based on LTE network, wherein: the power supply module adopts five-type wire remote feeding to provide stable and reliable direct-current power supply for each circuit unit of the device.