CN104660312A - Novel full-rate transmission method for establishing connection between mobile terminal and base stations in MIMO system - Google Patents
Novel full-rate transmission method for establishing connection between mobile terminal and base stations in MIMO system Download PDFInfo
- Publication number
- CN104660312A CN104660312A CN201310600015.7A CN201310600015A CN104660312A CN 104660312 A CN104660312 A CN 104660312A CN 201310600015 A CN201310600015 A CN 201310600015A CN 104660312 A CN104660312 A CN 104660312A
- Authority
- CN
- China
- Prior art keywords
- base station
- signal
- mobile
- antenna
- mimo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0625—Transmitter arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
Abstract
The invention discloses a novel full-rate transmission method for establishing connection between a mobile terminal and base stations in an MIMO system. A base station controller usually controls several base transceiver stations; through remote commands of the transceiver stations and mobile stations, the base station controller is in charge of management of all the mobile communication interfaces, mainly the allocation, release and management of wireless channels; the base station controller is in charge of opening a signal channel when a user uses a mobile phone, and closing and leaving the channel to others for use when the call is ended; in addition, the hand-off of the mobile stations within the control region is further controlled; if the user enters into the signal transceiver range of another base station when the mobile phone is used, the controller is further in charge of switching between the base station and another base station, and always keep connection with a mobile switching center; the GSM system adopts the switching manner during hand-off, that is, when the user arrives at the boundary of a cell, the mobile phone is likely to cut off the contact with the original base station first, and then establish contact with a new service cell; when the new service cell is busy, a communication channel is unavailable, and the offline phenomenon happens at the moment.
Description
Novelly set up the full velocity transmission method be connected between mobile terminal with base station in mimo systems
the novel full velocity transmission method be connected between mobile terminal with base station of setting up in mimo systems of the present invention belongs to simulation computer field.
MIMO (Multiple-Input Multiple-Out-put) system is a core technology applying to 802.11n.
802.11n be IEEE continue 802.11b a wireless local area network technology brand-new after g, speed can reach 600Mbps.
Meanwhile, proprietary MIMO technology can improve the performance of existing 802.11a/b/g network.This technology is proposed in 1908 by Marconi the earliest, and it utilizes multiple antennas to suppress channel fading.
According to transmitting-receiving two-end antenna amount, relative to common SISO (Single-Input Single-Output) system, MIMO can also comprise SIMO (Single-Input Multi-ple-Output) system and MISO (Multiple-Input Single-Output) system.
MIMO represents multiple-input and multiple-output, and read/maimo/ or/mimo/, usual American reads the former, and Englishman reads the latter, study in the world the expert in this field more all read/maimo/.Be widely adopted in forth generation mobile communication technology standard, such as IEEE 802.16e (Wimax), Long Term Evolution (LTE).
In new generation of wireless local area network (LAN) (WLAN) standard, be generally used for IEEE 802.11n, but also may be used for other 802.11 technology.
MIMO is referred to as space diversity sometimes, because it uses multiple spatial channel transmission and receives data.
Website (mobile device) or access point (AP) is only had to support could dispose MIMO during MIMO.
The application of MIMO technology, makes space become one and may be used for putting forward high performance resource, and can increase the coverage of wireless system.
The signal of radio transmitting, by reflex time, can produce many parts of signals.
Every part of signal is all a spatial flow.Use the system of single-input single-output (SISO) once can only send or receive a spatial flow.
MIMO allows multiple antenna to send simultaneously and receives multiple spatial flow, and can distinguish and to mail to or from the signal in different spaces orientation.
The application of multiaerial system, makes the parallel data stream of nearly min (Nt, Nr) to transmit simultaneously.
Base station and public mobile communication base station are a kind of forms of radio station, refer in certain area of radio coverage, and by mobile switching center, and radio station is believed in the transceiving carrying out information transmission between mobile telephone terminal.
The construction of mobile communication base station is the pith of mobile communication carrier of China investment, and the construction of mobile communication base station is all generally carry out around coverage rate, speech quality, returns of investment, construction difficulty or ease, the key element such as easy to maintenance.
Along with mobile communications network business is to datumization, packetizing future development, the development trend of mobile communication base station also necessarily broadband, large coverage rate construction and IPization.
So-called MIMO, with regard to the meaning seen on literal, be Multiple Input Multiple Output(multiple-input, multiple-output) abbreviation, your saying of seeing of major part, all refer to that wireless network signal is is synchronously received and dispatched by multiple antenna, so data transmission rate can be increased.
But more correct explanation, should be say, network data is by after multiple cutting, synchronous driving is carried out through multiple antenna, because wireless signal is in the middle of the process transmitted, for the purpose of disturbing, can walk different reflections or penetrate path, the time therefore arriving receiving terminal can be inconsistent.
In order to avoid data is inconsistent and cannot reconfigure, therefore receiving terminal can possess multiple antenna reception simultaneously, then utilizes the mode that DSP recalculates, according to the factor of time difference, the data of separating is combined again, then sends out correctly and data stream fast.
Because the data transmitted is through over-segmentation transmission, not only single data flow reduces, transmitting range can be drawn high, increase antenna range of receiving again, therefore MIMO technology not only can increase the data transmission speed of existing wireless network frequency spectrum, and additionally need not take spectral range again, the more important thing is, signal reception distance can also be increased.
So much emphasize the Wireless Communication Equipment of data transmission speed and transmission range, start one after another to cast aside the compliance to existing Wi-Fi Alliance, and adopt the technology of MIMO, release the radio network product of high transmission rates.
In slow Rayleigh fading channel, use 1 transmit antennas n root reception antenna, send signal by the individual different path of n.
If the decline between each antenna is independently, can obtain maximum diversity gain is n, and mean error probability can be reduced to, and the mean error probability of single antenna fading channel is.
For transmit diversity techniques, be utilize the gain of mulitpath to improve the reliability of system equally.
Have in the system of m transmit antennas n root reception antenna at one, if antenna between path gain be the Rayleigh fading of independent and uniform distribution, the maximum diversity gain that can obtain is mn.
Intelligent antenna technology is also send identical data by different transmitting antennas, forms the shaped-beam pointing to certain user, thus effectively improves antenna gain, reduces the interference between user.
Broadly, intelligent antenna technology also can calculate a kind of diversity antenna technology.
Diversity technique is mainly used to resist channel fading.On the contrary, the fading characteristic in mimo channel can provide extra information to increase the degree of freedom (degrees of freedom) in communication.
Inherently, if the decline between often pair of transmission/reception antennas is independently, multiple parallel subchannel so can be produced.
If transmit different information flows on the subchannel that these are parallel, can provide transmitted data rates, this is called as spatial reuse.
It needs to be noted when high SNR, transmission rate is that the degree of freedom is limited, now for m transmit antennas n root reception antenna, and antenna between be the Rayleigh fading of independent and uniform distribution.
According to the corresponding relation between sub data flow and antenna, spatial multiplexing system is roughly divided into Three models: D-BLAST, V-BLAST and T-BLAST.
The base station of broad sense is the abbreviation of base station sub-system (BSS, Base Station Subsystem).
For GSM network, comprise base station transceiver (BTS) and base station controller (BSC).A base station controller can control tens so that dozens of base station transceiver.
And in the systems such as WCDMA, similar concept is called NodeB and RNC.
The base station of narrow sense and public mobile communication base station are a kind of forms of radio station, refer in certain area of radio coverage, and by mobile switching center, and radio station is believed in the transceiving carrying out information transmission between mobile telephone terminal.
MIMO technology roughly can be divided into two classes: transmitting/receiving diversity and spatial reuse.Traditional multiple antennas is used to increase order of diversity thus overcome channel MIMO decline.
The signal with identical information is sent out away by different paths, can obtain the duplicate of the multiple independent decline of data symbol, thus obtain higher reception reliability at receiver end.
The selection of a base station, need consider from each side such as performance, supporting, compatible and instructions for uses, wherein it is specifically intended that base station equipment must be compatible or supporting mutually with mobile switching centre, so just can obtain good communication efficiency.
Base station sub-system mainly comprises two kind equipments: base transceiver station (BTS) and base station controller (BSC).
The large daily life of a family sees antenna high on roof, is exactly a part for base transceiver station.A complete base transceiver station comprises radio transmitting/receiving apparatus, antenna and the distinctive signal processing of all wave points.
Base transceiver station can regard a radio modem as, is responsible for the reception of movable signal, transmission processing.
Generally in certain region, multiple subbase station and sending and receiving stations form a cellular network mutually, mutually transmit by the signal controlled between sending and receiving stations and sending and receiving stations and receive the transmission reaching mobile communication signal, namely our network coverage face of often saying, the area within the scope of this.If without sending and receiving stations, that just can not complete transmission and the reception of mobile phone signal.
The blind area of the area that base transceiver station can not cover i.e. mobile phone signal.
So the scope of base transceiver station transmitting and receiving signal is directly connected to the quality of network signal and whether mobile phone normally can use in this region.
Base transceiver station, under the control of base station controller, completes the conversion between the control of base station and wireless channel, and the transmitting-receiving realizing mobile communication signal is transmitted by on-air radio and relevant controlling functions between mobile platform.
Sending and receiving stations can be decoded to the wireless signal of each user and send.
The antenna that base station uses is divided into transmitting antenna and reception antenna, and have omnidirectional and orientation point, generally can have following three kinds of configuration modes: an omnidirectional, receive to mode; Send out omnidirectional, receive oriented approach; Send out directed, receipts oriented approach.
From literal, we are just appreciated that the difference of often kind of mode, send out the omnibearing signal of omnidirectional's primary responsibility and send; Receive to the Received signal strength being naturally exactly an orientation; The directed meaning is exactly only carry out sending and receiving towards a fixing angle.
Generally, the less base station (as being positioned at suburb) of channel number often adopts and sends out an omnidirectional, receives to mode, and the more base station of channel number adopts and sends out an omnidirectional, receives directed mode, and the foundation of base station is also more intensive than suburb.
Because Signal transmissions is to may be more weak during base station, and there is certain signal disturbing, so will through preselector.
Module filtered and amplification, carry out dual frequency conversion, amplification and frequency discrimination process.The high-frequency signal of input sends into the first frequency converter after amplifying, and the first the machine oscillation signal frequency provided by frequency converter is 766.9125-791.8875MHz, after down-conversion, produces first intermediate-freuqncy signal of 123.1MHz.First intermediate-freuqncy signal, after amplification, filtering, mixing, produces the second intermediate-freuqncy signal (21.3875MHz), and it delivers to intermediate frequency integrated package after amplification, filtering.
The audio output signal produced by intermediate frequency integrated package (comprising the second intermediate frequency signal amplifier, amplitude limiter and frequency discriminator) and receiving signal intensity indication signal (RSSI) deliver to audio frequency/control board, in audio signal control board, odd and even number signal is constantly compared by diversity switch, and select stronger signal wherein, be sent to movements control center by voicefrequency circuit.
Base station transmitter operation principle is: be the CF signal of 766.9125-791.8875MHz and the modulated signal of 168.1MHz the frequency provided by frequency synthesizer, two balance converter is entered respectively through filtering, and obtain the radiofrequency signal that frequency is 935.0125-959.9875MHz, this radiofrequency signal is again through filtering be amplified into driving stage, the power output of driving stage is about 2.4W, is then added to power amplifier module.
The power output that power control circuit adopts negative-feedback technology automatically to adjust pre-driver stage or promotion level remains on rated value to make the power output of driving stage.
Namely the signal received is stablized and sent again, can effectively be reduced or avoid signal of communication loss in wireless transmissions like this, ensured the communication quality of user.
The effect of power amplifier module is that signal is amplified to 10W, but this also determines according to actual conditions, if cell transmission signal radius is comparatively large, also can adopt the power amplifier module of 25W or 40W, to strengthen the transmission radius of signal.
Base station controller comprises radio receiving-transmitting unit, antenna and relevant signal processing circuit etc., be the control section of base station sub-system, mainly comprise four parts: Cell Site Controller (CSC), voice channel controller (VCC), signaling channel controller (SCC) and the multichannel end interface (EMPI) for expanding.
A base station controller controls several base transceiver station usually, and by the remote command of sending and receiving stations and travelling carriage, all mobile communication interface management are responsible for by base station controller, the mainly distribution of wireless channel, release and management.When you use mobile phone, it is responsible for you and opens a signalling channel, and during end of conversation, it is again this channel off, leaves other people for and uses.
In addition, also the handover of travelling carriage in this controlled area is controlled.As you stride into the signal transmitting and receiving scope of another base station when using mobile phone time, controller is responsible for again mutually switching between another base station, and keep all the time with the connection of mobile switching centre.
Gsm system adopts switching mode when getting over district, and namely when user arrives cell boarder, mobile phone first can cut off with original base station and contact, and then to set up with the base station of new Serving cell and contact, when new Serving cell is busy, can not talk channel be provided, at this moment lost line will occur.
Therefore, user, when using mobile phone communication, should avoid using in blind area, corner, to reduce the probability of dropped call as far as possible.
The core of controller is switching network and common processor (CPR).
Common processor carries out control and management to each module in controller inside, and is connected with operation maintenance center (OMC) by X.25 communication protocol.
The inner exchanging of 64kbit/s data/voice service channel that switching network will complete between interface and interface.
Controller is connected with mobile switching centre by interface equipment digital repeater (DTC), is connected, forms a simple communication network by interface equipment terminal control unit (TCU) with sending and receiving stations.
In whole cell mobile communication systems, base station sub-system is the bridge that travelling carriage is connected with Mobility Center, and its status is of crucial importance.
The quantity of base station, the position of base station in cellular cell in the whole area of coverage, in base station sub-system, the factor such as service behaviour of associated component determines the communication quality of whole cellular system.
The type selecting of base station and construction, become the important ring setting up present mobile communication network.
Coverage: the nationwide automatic roaming that the nationwide automatic roaming GSM network that GSM network covers covers.
System reliability is good, as long as be not subject to the interference of extraneous various factors. and mobile phone receipts obtain local all energy locating alarming be subject to the extraneous factor interference such as weather, building, landform.
Center receives will two prerequisites: have satellite-signal and mobile phone signal, and system configuration cellular base station is located, mobile phone GSM message communications satellite is located, system independence GSM is single in mobile phone GPRS online communication, and self complete independently communication function also relies on GPRS.
The less investment of ratio of performance to price system, fill part play its function drop into also low, unit is slightly high, cost of use.
General positioning precision: be less than 50 meters in conjunction with road sign is the highest, minimum 1000 meters, general 5-80 rice, has drift phenomenon once in a while.
Feature
(1) location database is at each enterprise operation center, easily changes, and expense is low.
(2) due to 5 architectures, higher than itself location mobile, an online computing, scheme and software are installed and just can be operated electronically.
(3) do not limit by the vehicle woods, expense is low.
Application example private car (burglar alarm), Car Rental (track and localization), company car (antitheft scheduling) armoured van, commercial vehicle (real-time tracking), taxi (calling service by cable), public transit system scheduling.
Sum up: CPS technology is substantially the same with GPS, and GPS receives satellite fix, CPS receives cellular base station location, both will be transmitted by public network GSM/GPRS; GPS is better than CPS positional accuracy, but vehicle anti-theft CPS locate more than sufficient, CPS antitheft, tamper-proof, to reduce blind spot function better than GPS.
The main perception of Personal Handyphone System user transfers to requirement to signal stabilization from original to the requirement of coverage.
In accusing as can be seen from the PHS class signal Shen of the first quarter in 2007, account for except 5% except optimizing part, all the other 95% user awareness mainly caused due to equipment fault especially PHS base station fault decline.
(1) various places rest on the level of general " scene is seen, scene look into " all the time for base station fault process promptness rate, whether the indispensable relevant parameter of fault base station is known little about it (as being with ladder and whose contact upstairs etc.), can not accomplish " first understand, after look into repair ", cause fault base station to look into and repair overlong time; For simultaneously multiple base station fault, the measure such as pooling of resources priority treatment, specific aim process can not be adopted to ensure that operation is recovered in the high base station of traffic, cause this significant base stations maintenance time longer and have impact on the perception of a lot of users under this base station coverage area.
Display in the troubleshooting investigation to last quarter in 2006, base station fault process promptness rate is only up to 98.76%.
(2) base station basis maintenance work cycle, project are lumped together, regardless of grade, without differences, to safeguard targetedly, cause that the polling period of significant base stations is long, to patrol and examine content too simple, for significant base stations occurs alarm and affect large quantities of client and buried potential faults in the future.
(3) strengthen and improve the maintenance of basis, base station, accomplishing specific aim and the otherness of graduation base station maintenance from maintenance period and Maintenance Significant Items, get rid of base station fault hidden danger as far as possible;
(4) innovation safeguards that way improves productivity, improves base station fault treatment effeciency, the ratio of the user awareness that effective reduction causes because of base station fault.
The development of mobile communication cause is maked rapid progress, userbase tremendous expansion, and only the cellphone subscriber in Guangdong Province just breaks through 6,000 ten thousand.
In order to ensure the smooth and easy of mobile communication and realize seamless covering, telecom operators need sometimes in the larger office building of call demand, Zeng Jian mobile communication base station, residential block.
The radiation frequency of base station is about 900 megahertzes, substantially suitable with the radiation frequency of TV.Its power sending and receive only has tens 20 milliwatts, is not enough to form radiation pollution.
Main " the electromagnetic radiation protection regulation " and " environmental electromagnetic wave sanitary standard " issued with reference to State Bureau of Environmental Protection and the Ministry of Public Health of mobile communication base station standard of China.
Specifically, national standard require electric field strength be less than 12 volts/rice in other words power density every square centimeter be less than 40 microwatts.
And the radiation frequency of mobile communication base station is about 900 megahertzes, substantially suitable with the radiation frequency of TV.
What mobile communication was taked is microcellulor technology, and the power sending or receive is all very low, only has the energy level of tens milliwatts, twenties milliwatts, is not enough to cause radiation pollution completely.
Claims (5)
1. the novel full velocity transmission method that is connected between mobile terminal with base station set up in mimo systems of the present invention is according to transmitting-receiving two-end antenna amount, relative to common SISO (Single-Input Single-Output) system, MIMO can also comprise SIMO (Single-Input Multi-ple-Output) system and MISO (Multiple-Input Single-Output) system;
MIMO represents multiple-input and multiple-output, and read/maimo/ or/mimo/, usual American reads the former, and Englishman reads the latter, study in the world the expert in this field more all read/maimo/; Be widely adopted in forth generation mobile communication technology standard, such as IEEE 802.16e (Wimax), Long Term Evolution (LTE);
In new generation of wireless local area network (LAN) (WLAN) standard, be generally used for IEEE 802.11n, but also may be used for other 802.11 technology;
MIMO is referred to as space diversity sometimes, because it uses multiple spatial channel transmission and receives data;
The novel full velocity transmission method be connected between mobile terminal with base station of setting up in mimo systems of the present invention only has website (mobile device) or access point (AP) to support could dispose MIMO during MIMO;
The application of MIMO technology, makes space become one and may be used for putting forward high performance resource, and can increase the coverage of wireless system;
The signal of radio transmitting, by reflex time, can produce many parts of signals;
Every part of signal is all a spatial flow; Use the system of single-input single-output (SISO) once can only send or receive a spatial flow;
MIMO allows multiple antenna to send simultaneously and receives multiple spatial flow, and can distinguish and to mail to or from the signal in different spaces orientation;
The application of multiaerial system, makes the parallel data stream of nearly min (Nt, Nr) to transmit simultaneously;
Base station and public mobile communication base station are a kind of forms of radio station, refer in certain area of radio coverage, and by mobile switching center, and radio station is believed in the transceiving carrying out information transmission between mobile telephone terminal;
The construction of mobile communication base station is the pith of mobile communication carrier of China investment, and the construction of mobile communication base station is all generally carry out around coverage rate, speech quality, returns of investment, construction difficulty or ease, the key element such as easy to maintenance;
The present invention is novel set up in mimo systems the full velocity transmission method that is connected between mobile terminal with base station in order to avoid data inconsistent and cannot reconfigure, therefore receiving terminal can possess multiple antenna reception simultaneously, then the mode that DSP recalculates is utilized, according to the factor of time difference, the data of separating is combined again, then sends out correctly and data stream fast;
Because the data transmitted is through over-segmentation transmission, not only single data flow reduces, transmitting range can be drawn high, increase antenna range of receiving again, therefore MIMO technology not only can increase the data transmission speed of existing wireless network frequency spectrum, and additionally need not take spectral range again, the more important thing is, signal reception distance can also be increased;
So much emphasize the Wireless Communication Equipment of data transmission speed and transmission range, start one after another to cast aside the compliance to existing Wi-Fi Alliance, and adopt the technology of MIMO, release the radio network product of high transmission rates.
If 2. the novel decline of setting up in mimo systems between each antenna of full velocity transmission method of being connected between mobile terminal with base station of the present invention is independently, can obtain maximum diversity gain is n, mean error probability can be reduced to, and the mean error probability of single antenna fading channel is;
For transmit diversity techniques, be utilize the gain of mulitpath to improve the reliability of system equally;
The novel full velocity transmission method be connected between mobile terminal with base station of setting up in mimo systems of the present invention has in the system of m transmit antennas n root reception antenna at one, if antenna between path gain be the Rayleigh fading of independent and uniform distribution, the maximum diversity gain that can obtain is mn;
Intelligent antenna technology is also send identical data by different transmitting antennas, forms the shaped-beam pointing to certain user, thus effectively improves antenna gain, reduces the interference between user;
Diversity technique is mainly used to resist channel fading; On the contrary, the fading characteristic in mimo channel can provide extra information to increase the degree of freedom in communication;
Inherently, if the decline between often pair of transmission/reception antennas is independently, multiple parallel subchannel so can be produced;
If transmit different information flows on the subchannel that these are parallel, can provide transmitted data rates, this is called as spatial reuse;
It needs to be noted when high SNR, transmission rate is that the degree of freedom is limited, now for m transmit antennas n root reception antenna, and antenna between be the Rayleigh fading of independent and uniform distribution;
According to the corresponding relation between sub data flow and antenna, spatial multiplexing system is roughly divided into Three models: D-BLAST, V-BLAST and T-BLAST;
The base station of broad sense is the abbreviation of base station sub-system (BSS, Base Station Subsystem);
For GSM network, comprise base station transceiver (BTS) and base station controller (BSC); A base station controller can control tens so that dozens of base station transceiver;
And in the systems such as WCDMA, similar concept is called NodeB and RNC;
The base station of narrow sense and public mobile communication base station are a kind of forms of radio station, refer in certain area of radio coverage, and by mobile switching center, and radio station is believed in the transceiving carrying out information transmission between mobile telephone terminal.
3. the novel full velocity transmission method MIMO technology be connected between mobile terminal with base station of setting up in mimo systems of the present invention roughly can be divided into two classes: transmitting/receiving diversity and spatial reuse; Traditional multiple antennas is used to increase order of diversity thus overcome channel MIMO decline;
The signal with identical information is sent out away by different paths, can obtain the duplicate of the multiple independent decline of data symbol, thus obtain higher reception reliability at receiver end;
The selection of a base station, need consider from each side such as performance, supporting, compatible and instructions for uses, wherein it is specifically intended that base station equipment must be compatible or supporting mutually with mobile switching centre, so just can obtain good communication efficiency.
4. the novel full velocity transmission method base station sub-system be connected between mobile terminal with base station of setting up in mimo systems of the present invention mainly comprises two kind equipments: base transceiver station (BTS) and base station controller (BSC);
The large daily life of a family sees antenna high on roof, is exactly a part for base transceiver station; A complete base transceiver station comprises radio transmitting/receiving apparatus, antenna and the distinctive signal processing of all wave points;
Base transceiver station can regard a radio modem as, is responsible for the reception of movable signal, transmission processing;
Generally in certain region, multiple subbase station and sending and receiving stations form a cellular network mutually, mutually transmit by the signal controlled between sending and receiving stations and sending and receiving stations and receive the transmission reaching mobile communication signal, namely our network coverage face of often saying, the area within the scope of this; If without sending and receiving stations, that just can not complete transmission and the reception of mobile phone signal;
The blind area of the area that base transceiver station can not cover i.e. mobile phone signal;
So the scope of base transceiver station transmitting and receiving signal is directly connected to the quality of network signal and whether mobile phone normally can use in this region;
The present invention is novel sets up the full velocity transmission method base transceiver station that is connected between mobile terminal with base station in mimo systems under the control of base station controller, complete the conversion between the control of base station and wireless channel, the transmitting-receiving realizing mobile communication signal is transmitted by on-air radio and relevant controlling functions between mobile platform;
Sending and receiving stations can be decoded to the wireless signal of each user and send;
The antenna that base station uses is divided into transmitting antenna and reception antenna, and have omnidirectional and orientation point, generally can have following three kinds of configuration modes: an omnidirectional, receive to mode; Send out omnidirectional, receive oriented approach; Send out directed, receipts oriented approach;
From literal, we are just appreciated that the difference of often kind of mode, send out the omnibearing signal of omnidirectional's primary responsibility and send; Receive to the Received signal strength being naturally exactly an orientation; The directed meaning is exactly only carry out sending and receiving towards a fixing angle;
Generally, the less base station (as being positioned at suburb) of channel number often adopts and sends out an omnidirectional, receives to mode, and the more base station of channel number adopts and sends out an omnidirectional, receives directed mode, and the foundation of base station is also more intensive than suburb.
5. the novel full velocity transmission method that is connected between mobile terminal with base station set up in mimo systems of the present invention is because Signal transmissions is to may be more weak during base station, and has certain signal disturbing, so will through preselector;
Module filtered and amplification, carry out dual frequency conversion, amplification and frequency discrimination process; The high-frequency signal of input sends into the first frequency converter after amplifying, and the first the machine oscillation signal frequency provided by frequency converter is 766.9125-791.8875MHz, after down-conversion, produces first intermediate-freuqncy signal of 123.1MHz; First intermediate-freuqncy signal, after amplification, filtering, mixing, produces the second intermediate-freuqncy signal (21.3875MHz), and it delivers to intermediate frequency integrated package after amplification, filtering;
The audio output signal produced by intermediate frequency integrated package (comprising the second intermediate frequency signal amplifier, amplitude limiter and frequency discriminator) and receiving signal intensity indication signal (RSSI) deliver to audio frequency/control board, in audio signal control board, odd and even number signal is constantly compared by diversity switch, and select stronger signal wherein, be sent to movements control center by voicefrequency circuit;
The novel full velocity transmission method base station transmitter operation principle be connected between mobile terminal with base station of setting up in mimo systems of the present invention is: be the CF signal of 766.9125-791.8875MHz and the modulated signal of 168.1MHz the frequency provided by frequency synthesizer, two balance converter is entered respectively through filtering, and obtain the radiofrequency signal that frequency is 935.0125-959.9875MHz, this radiofrequency signal is again through filtering be amplified into driving stage, the power output of driving stage is about 2.4W, is then added to power amplifier module;
The power output that power control circuit adopts negative-feedback technology automatically to adjust pre-driver stage or promotion level remains on rated value to make the power output of driving stage;
Namely the signal received is stablized and sent again, can effectively be reduced or avoid signal of communication loss in wireless transmissions like this, ensured the communication quality of user;
The effect of power amplifier module is that signal is amplified to 10W, but this also determines according to actual conditions, if cell transmission signal radius is comparatively large, also can adopt the power amplifier module of 25W or 40W, to strengthen the transmission radius of signal;
Base station controller comprises radio receiving-transmitting unit, antenna and relevant signal processing circuit etc., be the control section of base station sub-system, mainly comprise four parts: Cell Site Controller (CSC), voice channel controller (VCC), signaling channel controller (SCC) and the multichannel end interface (EMPI) for expanding;
The novel full velocity transmission method base station controller be connected between mobile terminal with base station of setting up in mimo systems of the present invention controls several base transceiver station usually, by the remote command of sending and receiving stations and travelling carriage, the management of all mobile communication interfaces is responsible for by base station controller, the mainly distribution of wireless channel, release and management; When you use mobile phone, it is responsible for you and opens a signalling channel, and during end of conversation, it is again this channel off, leaves other people for and uses;
In addition, also the handover of travelling carriage in this controlled area is controlled; As you stride into the signal transmitting and receiving scope of another base station when using mobile phone time, controller is responsible for again mutually switching between another base station, and keep all the time with the connection of mobile switching centre;
Gsm system adopts switching mode when getting over district, and namely when user arrives cell boarder, mobile phone first can cut off with original base station and contact, and then to set up with the base station of new Serving cell and contact, when new Serving cell is busy, can not talk channel be provided, at this moment lost line will occur;
Therefore, user, when using mobile phone communication, should avoid using in blind area, corner, to reduce the probability of dropped call as far as possible;
The core of controller is switching network and common processor (CPR);
Common processor carries out control and management to each module in controller inside, and is connected with operation maintenance center (OMC) by X.25 communication protocol;
The inner exchanging of 64kbit/s data/voice service channel that switching network will complete between interface and interface;
Controller is connected with mobile switching centre by interface equipment digital repeater (DTC), is connected, forms a simple communication network by interface equipment terminal control unit (TCU) with sending and receiving stations;
In whole cell mobile communication systems, base station sub-system is the bridge that travelling carriage is connected with Mobility Center, and its status is of crucial importance;
The quantity of base station, the position of base station in cellular cell in the whole area of coverage, in base station sub-system, the factor such as service behaviour of associated component determines the communication quality of whole cellular system;
The type selecting of base station and construction, become the important ring setting up present mobile communication network;
The present invention is novel sets up the full velocity transmission method coverage be connected between mobile terminal with base station in mimo systems: the nationwide automatic roaming that the nationwide automatic roaming GSM network that GSM network covers covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310600015.7A CN104660312A (en) | 2013-11-25 | 2013-11-25 | Novel full-rate transmission method for establishing connection between mobile terminal and base stations in MIMO system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310600015.7A CN104660312A (en) | 2013-11-25 | 2013-11-25 | Novel full-rate transmission method for establishing connection between mobile terminal and base stations in MIMO system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104660312A true CN104660312A (en) | 2015-05-27 |
Family
ID=53251064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310600015.7A Pending CN104660312A (en) | 2013-11-25 | 2013-11-25 | Novel full-rate transmission method for establishing connection between mobile terminal and base stations in MIMO system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104660312A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069220A (en) * | 2016-01-14 | 2017-08-18 | 陶格拉斯集团控股公司 | Equipment, system and method for sighting directional aerial |
| CN107580342A (en) * | 2016-07-05 | 2018-01-12 | 大唐移动通信设备有限公司 | A kind of data processing method and device based on base station |
| TWI647931B (en) * | 2017-08-04 | 2019-01-11 | 關隆股份有限公司 | Wireless system data transmission method |
| TWI647929B (en) * | 2017-08-04 | 2019-01-11 | 關隆股份有限公司 | Wireless system data transmission method |
| TWI650974B (en) * | 2017-08-04 | 2019-02-11 | 關隆股份有限公司 | Wireless system data transmission method |
| CN108880632B (en) * | 2018-07-06 | 2020-05-19 | 中国电子科技集团公司第五十四研究所 | Apparatus for handoff of mobile station in multibeam geostationary satellite system |
| CN113596873A (en) * | 2021-07-19 | 2021-11-02 | 广东财通通讯科技有限公司 | Base station system channel sharing and replacing method and base station system |
-
2013
- 2013-11-25 CN CN201310600015.7A patent/CN104660312A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069220A (en) * | 2016-01-14 | 2017-08-18 | 陶格拉斯集团控股公司 | Equipment, system and method for sighting directional aerial |
| CN107580342A (en) * | 2016-07-05 | 2018-01-12 | 大唐移动通信设备有限公司 | A kind of data processing method and device based on base station |
| CN107580342B (en) * | 2016-07-05 | 2020-04-17 | 大唐移动通信设备有限公司 | Data processing method and device based on base station |
| TWI647931B (en) * | 2017-08-04 | 2019-01-11 | 關隆股份有限公司 | Wireless system data transmission method |
| TWI647929B (en) * | 2017-08-04 | 2019-01-11 | 關隆股份有限公司 | Wireless system data transmission method |
| TWI650974B (en) * | 2017-08-04 | 2019-02-11 | 關隆股份有限公司 | Wireless system data transmission method |
| CN108880632B (en) * | 2018-07-06 | 2020-05-19 | 中国电子科技集团公司第五十四研究所 | Apparatus for handoff of mobile station in multibeam geostationary satellite system |
| CN113596873A (en) * | 2021-07-19 | 2021-11-02 | 广东财通通讯科技有限公司 | Base station system channel sharing and replacing method and base station system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104660312A (en) | Novel full-rate transmission method for establishing connection between mobile terminal and base stations in MIMO system | |
| Zhang et al. | Fronthauling for 5G LTE-U ultra dense cloud small cell networks | |
| KR101546549B1 (en) | Auto-discovery and management of base station neighbors in wireless networks | |
| US20160249233A1 (en) | Providing broadband service to trains | |
| CA2316201C (en) | A communication system with base stations having test capabilities | |
| CN110463264A (en) | Random access indicating means, device and storage medium | |
| CA2414259A1 (en) | Transportable infrastructure for airborne cellular system | |
| CN101827386B (en) | Method, system and related device for adjusting transmitting power | |
| Kim et al. | Overview of moving network system for 5G vehicular communications | |
| CN111565062A (en) | Beam switching method and device | |
| CN112235879A (en) | Railway train control dual-mode wireless terminal and implementation method | |
| EP2819318B1 (en) | Repeater system and method for operating said system | |
| JP6074330B2 (en) | Access point, program, and method for controlling upper limit number of connections for each network identifier according to backhaul communication quality | |
| US20060281493A1 (en) | Wireless communications system | |
| CN102572928A (en) | Method and system for adjusting parameters and method for reporting measurement results, as well as equipment | |
| CN106686713B (en) | Uplink interference control method and device | |
| CN103118408B (en) | Method, the Apparatus and system of cell measuring method, cell measurement and switching | |
| Ren et al. | A robust inter beam handover scheme for 5G mmWave mobile communication system in HSR scenario | |
| CN106888467A (en) | A kind of high ferro WIFI systems based on millimeter wave | |
| Silalahi et al. | Improvement of Quality and Signal Coverage LTE in Bali Province Using Drive Test Method | |
| Wang et al. | Handover performance test and analysis in TD-LTE based CBTC train ground communication systems | |
| CN102724674B (en) | Interference suppression method of 3G and Ad hoc fusion network | |
| Sangsuwan et al. | The study of path loss and shadowing effect in V2V communication link using 5G communication technology | |
| CN105490685B (en) | Multiband adaptive communications system | |
| KR20060058352A (en) | Method for setting of frequency domain of repeater in mobile communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |