WLAN outdoor wireless access point device based on LTE network
Technical field
The present invention relates to communication apparatus technical field, relate in particular to a kind of WLAN outdoor wireless access point device based on LTE network.
Background technology
Along with the development of mobile Internet, terminal use becomes explosive growth for the demand of data service.Mobile Internet is compared the development of conventional internet, has skipped the primary stage of internet development, enters the epoch of " be applied as king, content is supreme ".
Just because of be applied as leading of king, mobile Internet development has proposed more and more higher requirement to broadband services, and therefore the development of TD-LTE is also extremely swift and violent.Even exceed the development of WIFI wireless coverage in some its wireless network speed of development of area; And become with respect to WIFI the present situation that the standard of each intelligent terminal is equipped with, and LTE is at the industrialization initial stage, and its terminal development relatively lags behind, and the scale commercialization of having high input still needs the situation of certain technological accumulation, has certain opposition mutually.
In view of popularizing rapidly of WiFi product, it is more and more valuable that the frequency spectrum resource of 2.4G frequency range seems.Due to complicated landform, the impact of barrier on electromagnetic transmission, influencing each other between a large number of users, electromagnetic wave can produce time delay spread, Rayleigh fading, multipath effect, common-channel interference etc., communication quality is had a strong impact on, and the area coverage of single WiFi product is limited.Current traditional AP adopts merely high-gain aerial, cannot solve the problem that this application exists, and can not meet the demand of development and application.
A kind of mode of LTE network as upstream data carrying that adopt of present specification exploitation, can make full use of LTE Internet resources and carry out WIFI wireless coverage, solves the problem of above-mentioned existence, further widens the use scenes of radio reception device.Can be widely used in the WIFI such as emergency communication, rural area covering, high-speed mobile scene covers.And the intelligence that realizes self-adapting signal optimal path selection covers, and improves electromagnetic antijamming capability, increase receiving signal sensitivity and cover signal quality.
Patent one: disclose " WLAN changing method and device under a kind of LTE-WLAN interworking between network " in prior art, see that publication number is:, within open day, be: Chinese patent, current WLAN focus is to the switching communication between arbitrary target WLAN focus, current WLAN focus switches next WLAN focus to the switching communication between arbitrary target WLAN focus and current WLAN focus entering and passes through LTE network three kinds of methods of switching to the switching communication of arbitrary target WLAN focus through most probable, having realized the communication that wireless terminal under any circumstance or mobile node all can complete from current WLAN focus to arbitrary target WLAN focus switches, effectively ensure that in handoff procedure, transfer of data is interrupted never, thereby QOS and network throughput are ensured.
Patent two: disclose " interconnection system of a kind of LTE and WLAN and changing method " in prior art, see that publication number is: 101841880A, within open day, be: the Chinese patent of 2010-09-22, this system is introduced the entity of virtual base station under LTE framework, sets it as WLAN and be linked into the interface of LTE.In LTE side, virtual base station keeps transparent for LTE side, has the function of general LTE base station.In WLAN side, virtual base station can be controlled WLAN access point.Switching between LTE and WLAN realizes by virtual base station, and the switching between LTE and WLAN adopts standard x 2 interfaces to realize handoff procedure.Between virtual base station and WLAN access point, adopt Level 2 Tunnel Protocol or Ethernet tunnel protocol to realize data and the transmitting-receiving of signaling, the data using WLAN as LTE system and the bottom transmission channel of signaling in handoff procedure.The advantage of this method is for LTE, and handoff procedure and LTE handoff procedure are consistent, very little on the impact of existing LTE.WLAN is connected to LTE in the tightly coupled mode of one, can meet largely for quality of service requirements, reduce system and switch the time delay of bringing, ensure systematic function.
Patent three: disclose " a kind of device of realizing multi-beam intelligent antenna with directional antenna " in prior art and seen that publication number is: 200969585, within open day, be: the Chinese patent of 2007-10-31, this device comprises the tier antenna array being made up of separate N face directional antenna, antenna selected cell, coprocessor unit, primary processor; N face directional antenna is connected with coprocessor unit input respectively, and coprocessor output is connected respectively with antenna selected cell, primary processor, and primary processor output is connected respectively with antenna selected cell, base station.This utility model has simple in structure, and compatibility is strong, and between antenna, cross correlation is little, and interference rejection capability is strong, base station range is large, and Contamination of Electromagnetic Wave is little, and base station power is low, and power control is easy, the advantages such as group battle array mode is flexible, and equalizing traffic volume ability is strong, and message capacity is large.This utility model is suitable for 3G system, the gsm system of 2G and following communication system such as 4G system and WLAN, PHS.
Type described in above patent one and patent two is that the network between LTE and WIFI cover switches, and present specification description is a kind of WIFI wireless access point device that can carry based on LTE network data.
Patent three is mainly that to solve between antenna cross correlation little, and interference rejection capability is strong, is limited etc. the problem of the wifi scene that causes because of link circuit resource and characteristic issues and present specification solves.
Summary of the invention
The technical problem to be solved in the present invention, be to provide a kind of WLAN outdoor wireless access point device based on LTE network, the intelligence that realizes self-adapting signal optimal path selection covers, and improves electromagnetic antijamming capability, increases receiving signal sensitivity and covers signal quality.
The present invention is achieved in that a kind of WLAN outdoor wireless access point device based on LTE network, and described device comprises: system-level processor, signal cover selected cell, power module and processor peripheral circuit unit; Described system-level processor is connected to a LTE wireless network card and multiple WLAN transceivers by central processing unit by the expansion of two PCIE expansion bridge sheets, forms complete Deta bearer link; Signal covers selected cell and is made up of CPLD logic controller, radio-frequency receiving-transmitting chain and control circuit and corresponding aerial array; This signal covers selected cell and is subject to central processing unit instruction control, obtains self-adapting signal and covers; Described power module provides power supply for device; Described processor peripheral circuit unit is for transceiving data or storage data;
Described system-level processor is connected in operator's core net by LTE wireless network card, and LTE wireless network card receives after signal, and data flow is forwarded to central processing unit through PCIE expansion bridge sheet; Central processing unit covers selected cell result according to signal data flow is expanded to bridge sheet through PCIE again, be modulated into radiofrequency signal by WLAN transceiver, radiofrequency signal sends via the radio-frequency receiving-transmitting chain after preferentially and control circuit and corresponding aerial array, covers flow process thereby form complete signal.
Further, described system-level processor comprises: WLAN transceiver and the LTE wireless network card on central processing unit, 2 road PCIE expansion bridge sheets, 5 tunnels; Described LTE wireless network card is connected with a LTE antenna, the PCIE interface that described central processing unit contains two-way; The one PCIE interface of the PCIE interface of described LTE wireless network card and central processing unit is all connected with a PCIE expansion bridge sheet of 2 road PCIE expansion bridge sheets, and the 2nd PCIE interface of described central processing unit is connected with the 2nd PCIE expansion bridge sheet; A described PCIE expansion bridge sheet is connected with 3 WLAN transceivers, and the 2nd PCIE expansion bridge sheet is connected with 2 WLAN transceivers; Described LTE wireless network card uses as upstream data bearing link, and data are connected LTE overlay network core network access by LTE wireless network card with supporting LTE antenna; And the WLAN transceiver on descending covering chain route 5 tunnels forms jointly, WLAN transceiver includes WLAN Base-Band Processing and radio-frequency (RF) receiving and transmission module, realizes the covering of WIFI signal and the processing of signal; The work for the treatment of that central processing unit read, filtered bag, forwarding and corresponding webmaster for the data flow of each PCIE interface input; Form complete data transmission link.
Further, described signal covers selected cell object and realizes the selection in subscriber signal Optimal coverage path, signal covers selected cell and comprises CPLD logic controller and single current signal capping unit, single current signal capping unit comprises the radio-frequency receiving-transmitting chain and control circuit, butler matrix and the 4*4 combined antenna battle array that connect successively, the WLAN transceiver on described 5 tunnels, CPLD logic controller is all connected with radio-frequency receiving-transmitting chain and control circuit, described single current signal capping unit is realized 4 narrow beams and is covered, described radio-frequency receiving-transmitting chain and control circuit are made up of 4 pairs of receiving-transmitting chains, correspond to one by one on the WLAN transceiver on 4 tunnels, can pass through any opening and closing receiving-transmitting chain of CPLD logic controller, and in the WLAN transceiver on 5 tunnels 1 tunnel as main WLAN transceiver, make the control of CPLD logic controller that receiving and transmitting signal is switched on 4 pairs of receiving-transmitting chains and is covered, main WLAN transceiver can be intercepted each WLAN transceiver data according to demand, and can carry out broadcast singal covering by the WLAN transceiver on each 4 tunnels, radio-frequency receiving-transmitting chain signal is out sent into butler matrix, and signal amplitude is adjusted to 4 kinds of required outs of phase by butler matrix, through forming the narrow beam of 4 kinds of different coverage directions after the stack of aerial array out of phase, the covering of each narrow beam is all to form by all 4*4 antenna arrays, central processing unit carries out optimum selecting according to controlling CPLD logic controller to radio-frequency receiving-transmitting chain, realizes adaptive user's Optimal coverage and selects.
Further, described processor peripheral circuit unit comprises: the first internal memory, the second internal memory, flash memory, RS232 transceiver, ethernet transceiver and lightning-protection module; Described the first internal memory, the second internal memory, flash memory are all connected with central processing unit, and described RS232 transceiver is connected with the UART interface of the first internal memory, the second internal memory, flash memory, central processing unit respectively; Described ethernet transceiver is connected with the first internal memory, the second internal memory, flash memory, the RGMII interface of central processing unit, lightning-protection module respectively; Described the first built-in storage, the second built-in storage and flash memory, for the various data storages of program and 820.11 agreements; Described RS232 transceiver, operates and monitors central processing unit; Ethernet transceiver is connected to central processing unit by RGMII interface, carries out exchanges data by RGMII interface protocol.
Further, described device, except adopting LTE network to do Deta bearer, can carry out electrical transmission mode by ethernet transceiver.
Further, described power module adopts category-5 cable remote feeding electricity, for each circuit unit of device provides reliable and stable DC power supply.
Tool of the present invention has the following advantages: the difference of the more traditional AP maximum of the present invention is to adopt LTE wireless network as Deta bearer mode and adaptive outdoor Optimal coverage function.The Deta bearer mode of many redundancies makes equipment not be limited to link circuit resource, is convenient to WLAN networking and covers; The application scenarioss such as high speed mobile object, rural area such as such as emergency communication equipment, train, make full use of LTE wireless network, save networking resource.
And intelligent covering can be carried out adaptive coverage direction selection according to user's service condition, cover by the optimum narrow beam of combination; Improve antijamming capability, improved user's collision problem, improved user capacity, add large coverage, reduced frequency and use resource and simplify networking and install, reduced the advantages such as installation cost.
As outdoor version overlay device, far because of space between user, user's hidden node problem is very serious, and number of users is more, and the collision probability between its user is very large, collides manyly, and the efficiency of base station will will reduce by capacity lower and user; And the present invention is when occurring when collision, user receives by different beams and receiver, can get one or time-division processing by algorithm, reduces collision, improves overall user capacity.
Signal covers by the narrow beam of dividing, and its energy is more concentrated, and penetrating capacity is stronger, can better cover the user of blocking, remote user, effectively improves overburden depth and the range of access point apparatus.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Refer to shown in Fig. 1, a kind of WLAN outdoor wireless access point device based on LTE network of the present invention, described device comprises: system-level processor, signal cover selected cell, power module and processor peripheral circuit unit; Described system-level processor is connected to a LTE wireless network card and multiple WLAN transceivers by central processing unit by the expansion of two PCIE expansion bridge sheets, forms complete Deta bearer link; Signal covers selected cell and is made up of CPLD logic controller, radio-frequency receiving-transmitting chain and control circuit and corresponding aerial array; This signal covers selected cell and is subject to central processing unit instruction control, obtains self-adapting signal and covers; Described power module provides power supply for device; Described processor peripheral circuit unit is for transceiving data or storage data;
Described system-level processor is connected in operator's core net by LTE wireless network card, and base station is by core net access control manager centralized management again; LTE wireless network card receives after signal, and data flow is forwarded to central processing unit through PCIE expansion bridge sheet; Central processing unit covers selected cell result according to signal data flow is expanded to bridge sheet through PCIE again, be modulated into radiofrequency signal by WLAN transceiver, radiofrequency signal sends via the radio-frequency receiving-transmitting chain after preferentially and control circuit and corresponding aerial array, covers flow process thereby form complete signal.In like manner, user data is linked into core net with reference to sublink direction, thereby realizes the wireless network covering of WLAN.
In the present invention, described system-level processor comprises: WLAN transceiver and the LTE wireless network card on central processing unit, 2 road PCIE expansion bridge sheets, 5 tunnels; Described LTE wireless network card is connected with a LTE antenna, the PCIE interface that described central processing unit contains two-way; The one PCIE interface of the PCIE interface of described LTE wireless network card and central processing unit is all connected with a PCIE expansion bridge sheet of 2 road PCIE expansion bridge sheets, and the 2nd PCIE interface of described central processing unit is connected with the 2nd PCIE expansion bridge sheet; A described PCIE expansion bridge sheet is connected with 3 WLAN transceivers, and the 2nd PCIE expansion bridge sheet is connected with 2 WLAN transceivers; Described LTE wireless network card uses as upstream data bearing link, and data are connected LTE overlay network core network access by LTE wireless network card with supporting LTE antenna; And the WLAN transceiver on descending covering chain route 5 tunnels forms jointly, WLAN transceiver includes WLAN Base-Band Processing and radio-frequency (RF) receiving and transmission module, realizes the covering of WIFI signal and the processing of signal; The work for the treatment of that central processing unit read, filtered bag, forwarding and corresponding webmaster for the data flow of each PCIE interface input; Form complete data transmission link.
Described signal covers selected cell object and realizes the selection in subscriber signal Optimal coverage path; Signal covers selected cell and comprises CPLD logic controller and single current signal capping unit; In addition, the present invention can be according to corresponding demand exploitation double space stream and three spatial flows, and increasing spatial flow need increase the single current signal capping unit of corresponding number.Single current signal capping unit comprises the radio-frequency receiving-transmitting chain and control circuit, butler matrix and the 4*4 combined antenna battle array that connect successively, the WLAN transceiver on described 5 tunnels, CPLD logic controller is all connected with radio-frequency receiving-transmitting chain and control circuit, described single current signal capping unit is realized 4 narrow beams and is covered, described radio-frequency receiving-transmitting chain and control circuit are made up of 4 pairs of receiving-transmitting chains, correspond to one by one on the WLAN transceiver on 4 tunnels, can pass through any opening and closing receiving-transmitting chain of CPLD logic controller, and in the WLAN transceiver on 5 tunnels 1 tunnel as main WLAN transceiver, make the control of CPLD logic controller that receiving and transmitting signal is switched on 4 pairs of receiving-transmitting chains and is covered, main WLAN transceiver can be intercepted each WLAN transceiver data according to demand, and can carry out broadcast singal covering by the WLAN transceiver on each 4 tunnels, radio-frequency receiving-transmitting chain signal is out sent into butler matrix, and signal amplitude is adjusted to 4 kinds of required outs of phase by butler matrix, through forming the narrow beam of 4 kinds of different coverage directions after the stack of aerial array out of phase, the covering of each narrow beam is all to form by all 4*4 antenna arrays, can reach very high gain, meet large area and cover demand.Central processing unit carries out optimum selecting according to controlling CPLD logic controller to radio-frequency receiving-transmitting chain, realizes adaptive user's Optimal coverage and selects.
Described processor peripheral circuit unit comprises: the first internal memory, the second internal memory, flash memory, RS232 transceiver, ethernet transceiver and lightning-protection module; Described the first internal memory, the second internal memory, flash memory are all connected with central processing unit, and described RS232 transceiver is connected with the UART interface of the first internal memory, the second internal memory, flash memory, central processing unit respectively; Described ethernet transceiver is connected with the first internal memory, the second internal memory, flash memory, the RGMII interface of central processing unit, lightning-protection module respectively; Described the first built-in storage, the second built-in storage and flash memory, for the various data storages of program and 820.11 agreements; Described RS232 transceiver, operates and monitors central processing unit; Ethernet transceiver is connected to central processing unit by RGMII interface, carries out exchanges data by RGMII interface protocol.Described device, except adopting LTE network to do Deta bearer, can carry out electrical transmission mode by ethernet transceiver.Described power module adopts category-5 cable remote feeding electricity, for each circuit unit of device provides reliable and stable DC power supply.
The present invention can be except category-5 cable, optical fiber, also can be based on LTE network as upstream data bearing mode, solve limited etc. the solution of the wifi scene causing because of link circuit resource and characteristic issues.The present invention also introduces the intelligent WLAN soverlay technique of multi-beam, can effectively improve existing WIFI wireless coverage network and the requirement of arranging net.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.