CN2582302Y - Use of dynamic beam formation system for radio communication signal - Google Patents
Use of dynamic beam formation system for radio communication signal Download PDFInfo
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- CN2582302Y CN2582302Y CN02287447U CN02287447U CN2582302Y CN 2582302 Y CN2582302 Y CN 2582302Y CN 02287447 U CN02287447 U CN 02287447U CN 02287447 U CN02287447 U CN 02287447U CN 2582302 Y CN2582302 Y CN 2582302Y
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Abstract
The utility model relates to a dynamic beam forming used for the signal system of the radio communication in a wireless network. A base station and/or a UE device are provided with an antenna system with a beam forming selection range. The corresponding base station and the UE position are criterion used for judging a beam forming.
Description
Technical field
The utility model relates to wireless communication field.More particularly, the utility model relates to a kind of method and system that uses dynamic beam to be formed for wireless signals and/or reception in wireless network.
Background technology
Wireless telecommunications system is well known in this area.Usually, a base station will provide radio communication for many subscriber units.The base station will be typically be handled communicating by letter of a plurality of and custom system simultaneously.A maximum quantity that tolerance is parallel communications of base station capacity, it can be supported by the definite factor of such situation, as available horsepower and bandwidth.
Because not every user communicates by letter simultaneously with the base station, a base station can exceed its capacity that is used for parallel communications provides wireless radio service to a lot of users.If implementing the parallel communications of maximum quantity for a base station, attempting to set up further communication and will cause professional invalid indication, such as system's busy signal.
The service range of base station not only is confined to its ability of handling parallel communications, and is confined to a specific geographic area inherently.The geographic range of base station typically delimited by the position of base station antenna system and the power of base station transmitting signal.
In order to provide radio traffic on a broad geographic area, network system is equipped with a plurality of base stations usually.Each base station has its antenna system, and being positioned in fact selectively for the specific part in total geographic area that is covered by this system provides coverage.Above-mentioned system easily provides radio traffic for moving user unit, and this moving user unit can not interrupt the scope that ongoing radio communication is shifted out the scope of a base station and entered another base station.In above-mentioned network, the geographic area of a base station covering is commonly called the sub-district, and the telephone communication service that provides is commonly referred to as cellular phone service.
Plan that according to the current third generation partnership organization system of the specification requirement formation of (3GPP) is designed to the business that provides above-mentioned.In such system, typically send the base station and be called as " site b ", and typical subscriber unit, mobile or other mode is called as subscriber equipment (UE).
Go to cover in the specific geographic area at the design telecommunication system, this geographic area can be divided into predetermined cell pattern.For example, illustrational at Figure 1A, can delimit and be hexagonal cell, make this sub-district in honeycomb pattern, cover whole geographic area.In such system, each sub-district can have a base station, and this base station has an antenna and goes to provide 360 ° coverage at the center of sub-district.Though the layout of cell coverage area can be designed as without any the overlay region, in fact shown in Figure 1B, be certain to overlap at this transmission beam shown in the shade from adjacent cell-site antenna." switching " that the overlapping of this beam coverage makes communication in this moves UE another moves from a sub-district by mobile UE from a base station directs to another.But when this UE was positioned at this overlay region, an overlapping base station signal helped to receive interference signal by UE from different base stations.
For various reasons, the sub-district can be delimited and be various uneven shapes.The antenna system of directional antenna, phased array antenna or other type can be provided, make the beam that is used to send and/or receive from antenna for base station cover given shape and big or small specific geographic area.As illustrational by base station BS at Figure 1B, for being provided, the typing beam covers this sub-district, and use directional antenna or phased antenna battle array to make antenna for base station be positioned at the edge of sub-district.Form contrast with only placing a unipole antenna at the edge of sub-district and sending 360 ° of beams of communicate by letter, this can utilize power fully and avoided having advantage aspect the generation interference outside this sub-district.
Be different from the radio communications system that only is fit to the stationary user unit, because the service of a mobile UE can be provided by any base station within this system usually, the system that is designed to communicate by letter with the mobile subscriber has more complicated use pattern.Therefore, specific base stations may find that its power is fully used by the mobile UE that the sub-district from other enters its sub-district.
Inventor of the present utility model has realized that the actual use of response radio system, and the base station can dynamically be used to reconfigure the base station with relevant antenna system and send and/or receive beam.This may cause dynamically changing overall cell coverage area, and more easily to satisfy service needed, therefore the communication of avoiding fully attempting suffers the network busy signal.When a UE when sub-district moves to another, this can also cause " intelligence " to switch, and reduces to avoid communication.
Form in order to implement dynamic beam, inventor of the present utility model has realized that the data that produce the geographical position of the mobile UE of identification according to conventional method, such as using effective HA Global Positioning Satellite (GPS) system or base station triangulation method, can advantageously in the dynamic operation of base station antenna system, be used.
The utility model content
A radio telecommunication system is controlled base station RF signal of communication selectively.A base station is set up radio RF with a plurality of subscriber equipmenies (UE) and is communicated by letter.The position of the estimation of a UE is determined.Use the UE position of this estimation and the position of known base station antenna system to determine station-keeping data then then.Calculate beam based on this station-keeping data to a certain extent and form standard.Beam based on this calculating forms standard, is formed for the directional beam of RF signal of communication between this UE and base station antenna system, makes this directional beam have the estimated position of this UE.
One is preferably removed dynamically to reconfigure radio telecommunication system that the base station sends beam and comprises that a plurality of being used for set up the base station that radio RF communicates by letter with a plurality of subscriber equipmenies (UE).Each base station has a network interface that is connected with a plurality of channel processors.A plurality of modems are connected with corresponding channel processor.RF module has a relevant antenna array system and is connected with modem.This RF module antenna system is positioned at predetermined position, and offers at least one other the corresponding to geographical transmission range of transmission range of one of this base station and described base station.Beam-forming arrangement is operationally linked with the RF module of each base station, forms one group of beam of wanting in the beam area of going the antenna array system in the base station to produce.Geo-location processor is connected to channel processor and beam-forming arrangement.This network interface is connected to each other this base station.This network interface and this geo-location processor are configured to together:
A. corresponding to the position of the estimation of the UE that selects, with respect to the position data of the antenna array system of base station, handle the UE geographic position data, this base station has the transmission range of the estimated position of the UE that has selection,
B. the UE that distributes described selection is group, and each group is used to keep and the base station communication of selecting, this base station have the UE that has selection estimated position transmission range and
C. the parameter of output selection is given the beam-forming arrangement of base station, this base station has the transmission range that has estimated position, the feasible base station of selecting sends communication data for each UE of the UE respective sets of distributing with the typing beam, and the base station of this selection has the estimated position of corresponding UE.
The communication data that is used for the UE of each selection can have service quality and message transmission rate requirement.Preferably, to a certain extent, based on the service quality and the message transmission rate requirement of this communication data of the UE that will send to this selection, this network interface and geo-location processor are configured to distribute the UE of this selection to be group.The geographic position data of the UE of each selection can comprise the relative velocity data of the UE of estimation.Preferably, to a certain extent, based on the corresponding estimated speed data corresponding to the UE of the geographic position data of the UE position of this estimation and this selection, this network interface and geo-location processor are configured to distribute the UE of this selection to be group.
Preferably, the geo-location processor of each base station is configured to handle the UE geographic position data with respect to the position that pre-determines of its antenna array system, give its beam-forming arrangement with the parameter that output is selected, making its beam-forming arrangement control its RF module goes with the typing beam UE that selects to be sent communication data, the UE of this selection has the estimated position of the UE of a selection, is handled by described geo-location processor corresponding to the geographic position data of this estimated position here.Here the communication data that is used for UE has service quality and message transmission rate requirement, each base station geographic position processor preferably disposes to a certain extent service quality and the message transmission rate requirement based on the communication data of the UE that will send to selection, calculates beam to one facing to the UE beam of selecting and forms parameter.The geographic position data of the UE of each selection here comprises the estimation relative velocity data of this UE, each base station geographic position processor preferably disposes to a certain extent based on the corresponding estimated speed data corresponding to the UE of the geographic position data of the position of this estimation and selection, calculates beam to one facing to the UE beam of selecting and forms parameter.
Each base station geographic position processor can dispose by estimating that sends a beam coverage A
BeamThe zone calculate to send beam and form parameter, A
BeamAs the function of RF phase place and transmitting power P, so that the phase place and the transmitting power P that select, so that the station-keeping data of the UE that selects (θ, d), here at A
BeamWithin, θ represents the angle of UE from 0 degree benchmark of base station antenna system, and d represents from the distance of base station antenna system position.Here this base station antenna system has a plurality of pattern M, it provides difform beam to same-phase and power, the geo-location processor of this base station can dispose to calculate and send beam formation parameter, this parameter is as phase place , the function of transmitting power P and antenna system mode M, the phase place that goes output parameter to select for corresponding expression, the beam-forming arrangement of transmitting power P and antenna system mode M combination goes control to send beam formation.
In addition, the geo-location processor of each base station can be configured to export the beam-forming arrangement of the parameter of selection to the base station, make the beam-forming arrangement control RF module of this base station go the UE that selects to be sent or the received communication data with the typing beam, the UE of this selection has the estimated position of the UE of a selection, is handled by described geo-location processor corresponding to the geographic position data of this estimated position here.Each base station RF module can have ability to be gone to provide greater than a transmission or reception beam, makes each transmission or reception beam to carry signal of communication for independent UE group.In the case, each corresponding beam-forming arrangement is operationally linked with the RF module, forms one group of transmission of wanting in the beam area of going can produce or receive beam in the limit of power of the antenna array system of base station.
Each UE preferably comprises a modem that is connected with channel processor.UE RF module with associated antenna array 1 system is connected with this modem.This UE can have a geo-location processor that is connected with channel processor, this geo-location processor configuration uses HA Global Positioning Satellite (GPS) system to remove to determine current UE geographic position data, and these data send from UE RF module antenna and are used for being used by this base station.Each UE can comprise a beam-forming arrangement, and this beam-forming arrangement is operationally linked with the RF module of UE, removes to form in the beam area that the UE antenna array system can produce the beam of wanting.In the case, geo-location processor is connected to the UE beam-forming arrangement, configuration removes to handle with respect to the known position data of the base station of selecting the UE geographic position data of the UE position of an estimation, and the Control Parameter that output is selected is given this beam-forming arrangement.This UE beam-forming arrangement is controlled this UE RF module and is gone with the typing beam base station of selecting to be sent or the received communication data, the base station of this selection has the known position of the base station of selection, is handled by this UE geo-location processor with respect to the UE geographic position data of the known position of the base station of selecting here.
Other purpose and advantage of the present utility model is conspicuous to the experienced operator from following detailed description.
Description of drawings
Figure 1A and 1B illustrate the cell layout and the transmission mode of a routine.
Fig. 2 illustrates and makes the dynamic use that meets transmission beam addressing specific user set.
Fig. 3 illustrates to make and meets the dynamic use of transmitting beam, here the failure of base station experience.
Fig. 4 is a flow chart that is used for the dynamic reallocation of cell coverage area.
Fig. 5 A-5E illustrates one and uses beam formation that the base station of radio frequency beam coverage to the subscriber equipment of selecting (UE) is provided in many cases.
Fig. 6 is a flow chart that is formed for implementing the geographical position based on beam.
Fig. 7 is one and is used for the auxiliary beam in geographical position according to instruction of the present utility model and forms the base station of mobile communication system and the block diagram of UE part.
Fig. 8 illustrates as UE and moves to the situation that switch another sub-district from a sub-district.
Fig. 9 is used for the negotiations process that intelligence is switched among being described in the base station of cooperation.
Figure 10 illustrates according to instruction of the present utility model and forms the supporting subscriber equipment of base station use intelligence switching via beam.
Figure 11 is that a description forms the flow chart that the base station is used for intelligent switch step with beam.
Embodiment
The cell coverage area that is used for the radio communications system initial stage can be to dispose such as the mode in the illustrational routine of Figure 1B.But as substituting of the area of coverage that keeps accurately stipulating, the dynamic shape cell coverage area of the utility model utilization is deacclimatized actual real-time system and is used needs.The user of radio resource, coverage and service can share among the base station of a plurality of vicinities and cooperation fully.This causes increasing power system capacity, utilance and efficient.
Following description mainly is to propose to finalize the design dynamically from the base station transmits beam.But those this areas those skilled in the art will understand beam-forming applicability and also be suitable for receiving.Because the data demand that is among the two-way communication may be diverse for the up link and the downlink portion of same communication, for sending and receive preferred independent control beam shaping.In addition, can also advantageously adopt beam to form at UE for sending or receiving.
Preferably, utilize phased antenna battle array or similar antenna system for this base station, each sub-district.As known in the art, phased antenna battle array and other conventional systems can make the base station go emission (or reception) that the beam of the size selected is arranged in the direction of selecting.For the phased antenna battle array, a RF signal phase can be regulated to aim at and send beam, and signal power can be regulated the size of controlling this beam.Equally, day line options and size can play a part certain in the shape of beam and size.For example, a base station can have an antenna system that has two antenna arrays, and one produces narrow beam in given direction, and one produces wide relatively beam in given direction.
By adjusting above-mentioned parameter, two or more adjacent cells can be consulted and the zone of stipulating again to be covered by each base station for all sub-districts altogether in suitable more mode.As in the zone that covers at present by the result of its user's excess demand, or as the result by the residual resource of low traffic deal reflection, a base station can start negotiations process with one or more its neighbours in adjacent sub-district.Except that the above, may exist other the sub-district that can make to start the reason of negotiations process.This negotiations process itself preferably uses the interface between themselves inevitable with many message between the base station of cooperation.In the ending of this negotiations process, cell set can reach and cover the new division of the gross area, thereby improves the serviceability of set.Illustrate with radio-frequency (RF) energy by the beam forming technigue of antenna array by the new zone that each base station covers.
The example of Fig. 2 and 3 description schemes.Fig. 2 illustrates at base station BS
1In the zone and at base station BS
1And base station BS
3The set of user between the zone.In case in these zones, determine highdensity user, at base station BS
1And base station BS
3Antenna array be used to send selectable typing and directional beam, to provide the radio resource that needs for this user set.Fig. 3 illustrates a kind of base station BS
3The situation of experience failure.Base station BS
1And base station BS
2Be used to send selectable typing and directional beam, with usually by base station BS
3Provide the radio resource that needs to the user in the zone of service.
Fig. 4 is that a description relates to the flow chart that uses antenna array dynamically to redistribute the typical step sequence of base station range.At first, parameter being set is used to start this and redistributes.In order to follow the tracks of and to determine the starting result, this network is preferably remembered the number of efficient communication between each base station and UE and UE specific region.Because mobile UE position may change continuously, preferably, these information are by with very fast Velocity Updating.
Except that the position of this UE, the speed of UE and direction also may be announced by UE or be estimated by BS.These information companies the position in future that map information can be used for calculating this UE.These information can be used for (1) and reduce the frequency that must be sent to the position data of BS by UE, and (2) determine whether that this network will reach full capacity probably in (in the recent period) future.The latter can be taken into account in beam formation decision process.
These data make this network go to determine whether that specific base stations reaches full capacity or reaches full capacity probably.Then, when the users in collaboration of communicating by letter with specific base stations reached threshold number or data service deal and reaches threshold quantity, this re-allocation process can be started.The number that compares ongoing communication in adjacent sub-district, and if have enough low number, this negotiations process begins between two or more base stations.Because the UE position is known, quite highdensity user can also be used as the starting result in a little zone.Preferably, the base station failure also is interpreted as starting the result, goes to provide the auxiliary coverage by adjacent base station.
After starting by the starting result, this negotiations process is preferably inevitable with all UE position datas of estimation, being used for UE communicates by letter with specific base stations, and mate them with one group of beam direction figure that can be used for certain base station, provide UE to have the more smooth service distribution of identical or low signal noise ratio (SNR).In case finish this negotiations process, the RF signal of this base station its transmission of refocus goes to be provided at the beam of determining during this negotiations process for UE.
Beam forms selects preferably to use the UE geographic position data to determine.Data business volume also is a key factor, especially forms when being applied to communicate by letter with a plurality of UE when beam.
Fig. 5 A illustrates a basic example, and base station 10 is at single UE, UE here
1Last focusing radio frequency beam 12.At this situation UE
1Down, this base station beam is to use clear and definite position information and/or this targeted customer's position to form.
Fig. 6 provides a flow chart that this process is basic.The first step is made up of the position of determining position and/or object UE.This preferably by using technique known to realize, comprising: 1) based on the method for UE, such as the GPS method; 2) based on network triangulation is such as based on arriving at the time difference (TDOA), the method for incidence angle (AOA); 3) comprise the mixed method of UE and network.When using based on the UE technology, second communication steps is provided, make this network know the position data of each object UE according to it.This process is included in the suitable calculating of exchange between UE and the network.
Occur beam then and form calculation procedure, preferably comprise the decision process of the position data of based target UE.During this step, in order to serve this object UE by this network, this network is determined beam-forming feature in mode that think fit and/or optimum.This decision process also can comprise the two-way communication process, and wherein this UE also relates to decision process.At last, form this beam, remove to produce the RF beam of selecting size and pointing to, as mirror the position that covers UE according to its geographic position data based on decision process.
Relevant components block diagram partly at Fig. 7 illustrated base station 20 and UE 30.This base station 20 is preferably handled via one group and the channel processor 22 of formatted data is coupled to network element.This base station/network interface can be wired, wireless or the connection of any other type.
This channel processor 32 is connected with set of modem unit 24.These modulator-demod 24 modulation signals are used to send the signal with demodulate reception.A RF module 26 has relevant phased antenna array 1 system 27, and is connected with modulator-demodulator 24.24 these modulated signals that receive are used for sending for the carrier frequency of selecting from the base station modem unit in these RF module 26 conversions.This RF module 26 is operationally relevant with beam-forming arrangement 28, and it is selected that beam-forming arrangement 28 can be adjusted power supply, RF phase place and antenna selectively, forms the beam of wanting with the beam area that can produce from this antenna array system 27.Geo-location processor 29 is handled the UE geographic position data, gives this beam-forming arrangement 28 with the output selected parameter.
This antenna system 27 can have scope or a sheet of discrete directional beam angularly that the angle directional beam is arranged.This beam codomain also can have different beam widths, can obtain specific angle orientation.Preferably, this RF module 26 is configured to make it can provide more than a transmission beam, makes each beam can carry the signal of communication that is used for organizing separately UE.Preferably, because the data flow of telex network usually is uneven, the beam that is used to receive forms and forms irrelevant with the beam that is used to send.For example, if this UE request msg link goes file in download, in such communication period, will be to this down link data of this UE usually very greater than any uplink data flow to this base station.
This UE 30 comprises a channel processor 32 that is used to handle with formatted data, and this channel processor 32 is connected with modulator-demod 34.Can provide an application processor 33 to go to support different voice-and-datas to handle uses.The signal that these modulator-demod 34 modulation are used to send, and the signal of demodulate reception.A RF module 36 has a relevant antenna 37, and is connected with this modulator-demodulator 34.These RF module 36 conversions are used for sending for the carrier frequency of selecting from this modulated signal that UE modulator-demodulator 34 receives.Can provide a geo-location processor 39 to determine the UE geographical position from gps system, send to this base station 20 then, preferably to be used for the frequent spacing of mobile UE.
This UE can be equipped with a beam-forming arrangement 38 (with shown in the shade), and it is selected to adjust power supply, RF phase place and antenna selectively, forms the beam of wanting with the beam area that can produce from this antenna array system 37.In the case, provide this geo-location processor 39 to remove to handle this UE geographic position data, give the beam-forming arrangement of this UE with the output selected parameter.Using beam to be formed for UE sends and/or receives and can be reduced in UE and both provide benefit for network with signal to noise ratio.In many cases, sending directional beam will reduce by UE other the system base-station or the interference volume of the generation of the UE outside this beam.In many cases, receive through directional beam and will reduce the signal that receiving interference volume for the information source outside this beam.
For convenience's sake, can with regard to polar coordinates, state for this geographic position data of each UE and base station antenna positions with respect to this base station will send to this UE from this base station beam.With reference to figure 5A, in the enforcement, this base station receives UE
1Position data, as (θ
1, d
1), θ here
1Represent the angle of this UE from 0 degree reference ray of base station antenna system, and d
1Expression UE is from the estimated distance of base station antenna system position.
Here dynamic beam forms by UE and adopts, and is used for the geographic position data of this UE and can be similarly just states to communicate by letter with this UE in the base station of this selection with regard to the known position polar coordinates of the base station of selecting.In the case, this station-keeping data coordinate θ represents the base station the selected angle from the 0 degree reference ray of UE, and d represents the estimated distance of this UE from the base station of this selection.
Here adopt a phased antenna array 1 system, this beam coverage area A
BeamBe RF phase place and the function F () that is used to launch beam, transmitting power P.The specific antenna system of this employing also can provide the different selected pattern M of antenna, and it provides different beam shapes for same-phase and power supply, and for example the selection of broad-beam condition and narrow beam can be effective for giving phase bit.Therefore, common:
A
Beam(, P M) (are used for sending)=F
A
Beam( M) (is used for receiving)=F
Because beam direction θ
BeamMainly become θ with phase place
Beam=f ():
A
Beam=F (f
-1(θ
Beam), P M) (is used for sending)
A
Beam=F (f
-1(θ
Beam), M) (be used for receiving)
Be applicable to this, in Fig. 5 A, provide a transmission beam 12 to remove to cover UE
1,
A
beam12＝F(f
-1(θ
1)，P，M)
Here select P, M makes A
Beam12At least expand one apart from d
1
Can use phased array antenna with two-way beam.Typically, such antenna direction beam be with one axisymmetric.By stipulating the 0 degree benchmark of this antenna along the shaft angle degree, beam direction θ
BeamWith the functional relation of phase place can be according to its absolute value representation, as:
|θ
beam|＝f()
Here the polar coordinates of representing the UE position data are converted, and make this angular data θ from benchmark mobility scale ± 180 degree of 0 degree angle of this base station, promptly-180 °≤and θ≤180 °.
To keep enough signal to noise ratio (interference) ratios (SNR) of signal of this reception at principal element, the especially P and the M that select beam to form in the parameter.In capacity or the restricted system of coverage, target normally obtains to allow the highest SNR.In the system of interference-limited system, in CDMA, target is to satisfy some minimum SNR to guarantee gratifying QoS with the link for needs, rather than very high, so that do not cause the unnecessary interference of other link.SNR is S ÷ I, and S is that useful signal and I disturb here.General formula is:
Here: S
bBe the useful signal in receiver,
N
0Be noise, and
∑ S
kIt is the summation of disturbing from other the signal of communication.
S
KThe essence of value is subordinated to the modulation in the use usually, with the distance relation of being inversely proportional to.
Fig. 5 b to 5d illustrates different situations.In Fig. 5 B, UE
2And UE
3Sufficiently away from, the beam that forms on each UE from antenna for base station battle array 10 has benefit.In transmission, point to UE
2Beam away from pointing to UE
3The beam that forms.Therefore, neither provide very big interference to reduce the corresponding SNR of received signal.
In Fig. 5 C, this beam has very big overlapping, and very big interference appears in expression signal separately mutually.At UE
2And UE
3One of both, another transmission will show as very big noise factor.In Fig. 5 D, illustrate two identical UE, UE
2And UE
3Cover by single broad-beam condition in identical specific region.To the signal of each UE, owing to do not have second signal that another UE is met less interference signal, thus improve the denominator of signal-to-jamming ratio.Keep constant if arrive the power of UE, illustrate alternative at Fig. 5 C, the selection of the mode parameter M of reflection broad-beam condition shape improves signal to noise ratio.
In actual applications, other variable can the acquisition effect.During sending from the base station, in fact the Power Limitation in transmitter or some may need low ability to arrive this UE to the potential interference of distance at a distance, owing to may enlarge beam, increase the noise from other information source.Especially, the beam of two or more adjacent base stations is being determined and is being used for the sub-district and redistributes here, and in the suitable group beam in the base station that is identified for relating to processing, the power and the shape of the beam that is sent by adjacent sub-district preferably are considered.
In addition, because dissimilar communication has different message transmission rates and quality of service requirement, can consider the type of communicating by letter.For example, data file transmits and can implement with lower speed, but for the program file of this transmission goes correctly to work, because every bit machine data program file must be correct usually, can need high-quality business.Voice or video conference may have low quality of service requirement, but may need high message transmission rate, so that these voice or video conference can appear not interrupt real-time enforcement to the user.Music or video information stream communication may have similar service quality and message transmission rate requires to be used for downgoing line, and it can be very uneven still requiring with respect to up link.Therefore, because in the base station 10 and separately UE
2And UE
3Between two independently communicate by letter uneven message transmission rate and quality of service requirements, Fig. 5 C can represent selectively to form from the base station 10 to UE
2And UE
3Down link send beam, and Fig. 5 D can represent to be suitable for those communications and selectively forms up links for base station 10 and receive beams.
If use the message transmission rate of a beam to support both requirements of UE inadequately, perhaps must remove to change modulation format (speed, each sign bit or the like .) can use a beam.Such change is reduced in the signal value in the molecule probably.Therefore, the geo-location processor of base station is preferably carried out relative calculating, be identified for such beam whether best situation relate to the power of one or two beams and needs.Then preferably based on SNR realize the offering the best beam direction figure of signal.Expand this calculating and go to comprise that from directly focusing on the possibility that UE rotates this beam be reasonably, when for denominator when unfavorable a bit, because being separated in the molecule of this increase can merit attention more.
Fig. 5 E illustrates the situation that increases the UE number, UE
1To UE
7Be convenient to calculate, this UE can be according to its angle polar coordinates sign, makes all UE
iBy (θ
i, d
i) expression, and UE
I+1By (θ
I+1, d
I+1) expression, θ
i≤ θ
I+1For the UE of many N, this beam forms therefore search (θ of selection course
i,-θ
I+1) two maximums, i.e. Δ θ
I, i+1, comprise Δ θ
N, 1, go to determine with respect to this antenna for base station battle array 10 hithermost two group UE in angle orientation.Fig. 5 E is illustrated in UE
7And UE
1(Δ θ
7,1) between angular displacement, and at UE
3And UE
4(Δ θ
3,4) between angular displacement be maximum situation, thereby UE, UE
1To UE
3And UE, UE
4To UE
7The initial selection is used for dividing into groups.
Each θ for the configuration of the beam of two propositions
BeamCan select each end UE angular orientation of two groups of cutting then at first.Under the situation of Fig. 5 E, for the θ of the beam of first proposition configuration
BeamPreferably be initialized as (θ
1+ θ
3) ÷ 2, reach θ for the beam configuration of second proposition
BeamPreferably be initialized as ((θ
4+ θ
7) ÷ 2.
Select M to go to guarantee that enough wide beam removes to cover the azimuth width between the end UE of each group then, and the distance of selecting P to go to guarantee that signal penetrates is enough to cover the distance on the range coordinate d that is reflected in each UE in the corresponding UE group.Can carry out improving at the benchmark SNR of system determining whether, make to provide to improve to cause attempting to stop the cluster variation type for other the calculating of group.Here this antenna array provides two-way symmetrical beam, and just as discussed above, based on the absolute value of the corresponding angle position 6 of each UE, above-described calculating can be changed, and this angle position 6 will ° scope change in-180 °≤θ≤180.
Dynamic beam forms and can also be advantageously employed in the switching of implementing ongoing communication.For UE is communicated, this UE sets up a RF link between own and base station antenna system, and this base station antenna system may be positioned on the antenna in cell bar.In this UE moved, the characteristic changing of RF link and the received signal quality on UE and/or antenna in cell bar may reduce, and caused that switching compensation process is started.Fig. 8 illustrates a UE and implements and base station BS in a sub-district
1Communicate by letter, and move towards the direction of an adjacent sub-district, adjacent sub-district is by different base station BSs
2Service.
This switching compensation process relates to UE and a plurality of candidate Target cell, if implement, one of them selection is used for switching then.Fig. 9 illustrates and carry out the negotiations process that intelligence is switched and determined among the base station that cooperates.During this switches compensation process, communicate by letter among them in each candidate sub-district, and exchange is for RF resource availability information, with being worthy of consideration and the compensated information of supporting that UE is relevant of any other.Because the beam of two or more adjacent base stations is being determined and is being used for the sub-district and redistributes, and is determining that suitable group beam is used for being included in the base station of this process, the power and the shape of the beam that is sent by adjacent sub-district are preferably taken into account.This negotiations process utilizes beam to form and selects, based on aforesaid UE geographic position data.The result who consults is the base station that definite group beam of selecting is used to relate to, and UE is provided the coverage with low relatively SNR.
During this negotiation phase, this UE uses the beam of following the tracks of and focusing on to continue to be supported by the initial cell mast by means of its antenna array.Thereby this switching compensation process is influenced by severe time restriction not necessarily.As illustrational, under opposite extreme situations,, can determine that this initial cell is best location, and should continue to serve this UE if contiguous sub-district can not be accepted this UE effectively at Figure 10.This is by for example base station BS
1The beam of this antenna array form and tracking performance carries out, to continue maintenance and UE
1And UE
3Communication, exceed UE even they have moved
1The normal cell coverage.In the illustrational example of Figure 10, highdensity user presses close to base station BS
2Cause " intelligence " to switch and determine to reconfigure the beam of expansion from base station BS
1Continue to serve UE
3
Figure 11 is one and is used for implementing the flow chart that " intelligence " switches general process that in fact it can cause not switching carrying out.The first step will be started this intelligence handoff procedure by the appearance of start event.This start event preferably comprises the threshold value that relates to the UE position data, the change of expression moving direction position data, the UE signal quality worsens, in the communication period as required that according to communications applications is the basis, serving BS load in service and change UE need, and can switch from low high data rate.
In case start this process, this serving BS determines that the base station will be to all base station selected preferred beam configuration modes that relates to.In case select new beam layoutprocedure, implement this relevant base station beam of refocus.Before its new beam modality is implemented in this initial service base station, this new serving BS will at first implement to be identified for its this selection beam and obtain this UE communication, switching will appear.
The cell coverage area that intelligence is switched and universe network is dynamically finalized the design is used, and this intelligence switching standards only may be to the effect in the dynamic typing start event of the illustrational cell coverage area process of Fig. 4.
Though described the utility model with regard to some specific parameter, other variation will be conspicuous easily concerning those skilled in the art, and be considered to drop within the scope of the present utility model.
Claims (16)
1. radio telecommunication system is characterized in that described system comprises:
A plurality of base stations are used for setting up radio RF with a plurality of subscriber equipmenies (UE) and communicate by letter;
Each base station has:
A network interface that is connected with a plurality of channel processors;
The modem that a plurality of and corresponding channel processor is connected;
A RF module, it has a relevant antenna array system and is connected with described modem;
This RF module antenna system is positioned at predetermined position, and offers the geographical transmission range that the transmission range of one of this base station and at least one other base station of described a plurality of base stations overlaps mutually; With
A beam-forming arrangement, this beam-forming arrangement is linked by this RF module operationally, forms one group of required beam in the beam area of going the antenna array system in this base station to produce; With
A geo-location processor is connected to channel processor and described beam-forming arrangement;
This network interface interconnects described base station, and is configured to together with this geo-location processor:
Corresponding to the position of the estimation of the UE that selects, with respect to the position data of the antenna array system of base station, handle the UE geographic position data, this base station has the transmission range of the estimated position of the UE that has selection;
Distribute the UE of described selection to be group, each group is used to keep and the base station communication of selecting, and this base station has the transmission range of the estimated position of the UE that has selection; With
The parameter that output is selected is given the beam-forming arrangement of base station, this base station has the transmission range that has estimated position, the feasible base station of selecting sends communication data for each UE of the UE respective sets of distributing with the typing beam, and this typing beam surrounds the estimated position of corresponding UE.
2. according to the radio telecommunication system of claim 1, the communication data that it is characterized in that being used for the UE of each selection has service quality and message transmission rate requirement, and described network interface and geo-location processor are configured service quality and the message transmission rate requirement of part based on the communication data of the UE that will send to selection, distribute the UE of described selection to be group.
3. according to the radio telecommunication system of claim 1, the geographic position data that it is characterized in that the UE of each selection comprises the relative velocity data of this UE of estimation, and part is based on the corresponding estimated speed data corresponding to the UE of the geographic position data of the position of this estimation and this selection, and this network interface and geo-location processor are configured to distribute the UE of this selection to be group.
4. according to the radio telecommunication system of claim 3, the communication data that it is characterized in that being used for the UE of each selection has service quality and message transmission rate requirement, and described network interface and geo-location processor are configured service quality and the message transmission rate requirement of part based on the communication data of the UE that will send to selection, distribute the UE of described selection to be group.
5. according to the radio telecommunication system of claim 1, the geo-location processor that it is characterized in that each base station is configured to handle the UE geographic position data with respect to the position that pre-determines of its antenna array system, give its beam-forming arrangement with the parameter that output is selected, making its beam-forming arrangement control its RF module goes with the typing beam UE that selects to be sent communication data, this typing beam surrounds the estimated position of the UE that selects, is handled by described geo-location processor corresponding to the geographic position data of this estimated position here.
6. according to the radio telecommunication system of claim 5, it is characterized in that the communication data that is used for a UE has service quality and message transmission rate requirement, and each base station geographic position processor is configured service quality and the message transmission rate requirement of part based on the communication data of the UE that will send to selection, calculates the beam that is used for facing to the UE beam of selecting and forms parameter.
7. according to the radio telecommunication system of claim 6, the geographic position data that it is characterized in that the UE of each selection comprises the relative velocity data of this UE of estimation, and part is based on the corresponding estimated speed data corresponding to the UE of the geographic position data of the position of this estimation and this selection, and each base station geographic position processor is configured to calculate the beam that is used for facing to the UE beam of selecting and forms parameter.
8. according to the radio telecommunication system of claim 5, it is characterized in that each base station geographic position processor is configured by estimating that sends a beam coverage A
BeamThe zone calculate to send beam and form parameter, A
BeamAs the function of RF phase place and transmitting power P, so that select phase place and transmitting power P, so that the station-keeping data of selection UE (θ, d), here at A
BeamWithin, θ represents the angle of UE from 0 degree benchmark of base station antenna system, and d represents the distance from the base station antenna system position.
9. radio telecommunication system according to Claim 8, it is characterized in that each base station antenna system has a plurality of pattern M, it provides difform beam to same-phase and power, and each base station geographic position processor is configured to calculate the transmission beam and forms parameter, parameter is as phase place , the function of transmitting power P and antenna system mode M, and remove to export the phase place that expression is selected, the parameter of transmitting power P and antenna system mode M combination is gone control to send beam for corresponding beam-forming arrangement and is formed.
10. according to the radio telecommunication system of claim 9, the geo-location processor that it is characterized in that each base station is configured to export the beam-forming arrangement of the parameter of selection to the base station, make the beam-forming arrangement control RF module of this base station go the UE that selects to be sent or the received communication data with the typing beam, this typing beam surrounds the estimated position of the UE that selects, is handled by described geo-location processor corresponding to the geographic position data of this estimated position here.
11. radio telecommunication system according to claim 10, it is characterized in that each base station geographic position processor is configured to go to receive beam formation parameter as the function calculation of RF phase place by a zone of estimation reception beam coverage, make phase place selected, so that the station-keeping data of the UE of this selection is within the regional extent that receives the beam coverage.
12. radio telecommunication system according to claim 11, it is characterized in that each base station antenna system has a plurality of receptions, it provides difform beam to same-phase, each base station geographic position processor is configured to calculate the reception beam and forms parameter, each base station parameter is as the function of phase place and antenna system receiving mode, and the parameter of going to export phase place that expression selects and the combination of antenna system receiving mode goes control to receive beam to beam-forming arrangement to form.
13. according to the radio telecommunication system of claim 5, it is characterized in that the ability that each base station RF module has to be provided more than a transmission beam, make each send beam and can carry signal of communication for independent UE group; With
Each corresponding beam-forming arrangement is operationally linked with this RF module, forms one group of required transmission beam in the transmission beam area of going the antenna array system in the base station to produce.
14. according to the radio telecommunication system of claim 1, it is characterized in that described system further comprises a plurality of mobile subscriber equipments (UE), each UE comprises:
Radio-frequency module with relevant antenna; With
A configuration uses HA Global Positioning Satellite (GPS) system to go to determine the geo-location processor in current UE geographical position.
15. according to the radio telecommunication system of claim 1, it is characterized in that described system further comprises a plurality of mobile subscriber equipments (UE), each UE comprises:
A RF module and a relevant antenna array system;
A beam-forming arrangement operationally links with the RF module, removes to form in the beam area that this antenna array system can produce a required beam; With
A geo-location processor that is connected to described beam-forming arrangement, its position data configuration known with respect to the base station of selecting removes to handle the UE geographic position data of the UE position of an estimation, and the parameter that output is selected is given this beam-forming arrangement, making this beam-forming arrangement control this RF module goes with the typing beam base station of selecting to be sent or the received communication data, the known position of the base station that this typing beam surround to be selected is handled by described geo-location processor corresponding to the geographic position data of this known position of the base station of selecting here.
16. according to the radio telecommunication system of claim 1, it is characterized in that described system further comprises a plurality of mobile subscriber equipments (UE), each UE comprises:
A modem that is connected with channel processor;
A RF module and a relevant antenna array system that is connected with described modem;
A beam-forming arrangement operationally links with the RF module, removes to form in the beam area that this antenna array system can produce a required beam; With
A geo-location processor that is connected to described channel processor and described beam-forming arrangement, its position data configuration known with respect to the base station of selecting removes to handle the UE geographic position data of the UE position of an estimation, and the parameter that output is selected is given this beam-forming arrangement, making this beam-forming arrangement control this RF module goes with the typing beam base station of selecting to be sent or the received communication data, the known position of the base station that this typing beam surround to be selected is handled by described geo-location processor corresponding to the geographic position data of this known position of the base station of selecting here.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US33422601P | 2001-11-29 | 2001-11-29 | |
| US33430901P | 2001-11-29 | 2001-11-29 | |
| US60/334,226 | 2001-11-29 | ||
| US60/334,309 | 2001-11-29 | ||
| US60/334,369 | 2001-11-29 |
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| CN2582302Y true CN2582302Y (en) | 2003-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02287447U Expired - Fee Related CN2582302Y (en) | 2001-11-29 | 2002-11-29 | Use of dynamic beam formation system for radio communication signal |
| CN02287446U Expired - Fee Related CN2582303Y (en) | 2001-11-29 | 2002-11-29 | Use of dynamic beam formation system for radio communication signal |
| CN02287445U Expired - Fee Related CN2582301Y (en) | 2001-11-29 | 2002-11-29 | Use of dynamic beam formation system for radio communication signal |
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| CN02287446U Expired - Fee Related CN2582303Y (en) | 2001-11-29 | 2002-11-29 | Use of dynamic beam formation system for radio communication signal |
| CN02287445U Expired - Fee Related CN2582301Y (en) | 2001-11-29 | 2002-11-29 | Use of dynamic beam formation system for radio communication signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106605376A (en) * | 2014-08-18 | 2017-04-26 | 高通股份有限公司 | Using known geographical information in directional wireless communication systems |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080218414A1 (en) * | 2004-06-30 | 2008-09-11 | Bo Hagerman | Antenna Beam Shape Optimization |
| AU2012228964B2 (en) * | 2011-03-17 | 2017-05-25 | Eprovenance, Llc | Methods and systems for securing chattels |
| WO2015036020A1 (en) * | 2013-09-11 | 2015-03-19 | Huawei Technologies Co., Ltd. | Antenna device and method for controlling focusing of an antenna beam of an antenna array |
| CN106953175A (en) * | 2017-03-17 | 2017-07-14 | 谭毅 | Antenna array beam forming discrete angular control method |
| CN109151977B (en) * | 2018-07-09 | 2020-09-04 | 南京中兴软件有限责任公司 | Power control method and device and computer readable storage medium |
-
2002
- 2002-11-29 CN CN02287447U patent/CN2582302Y/en not_active Expired - Fee Related
- 2002-11-29 CN CN02287446U patent/CN2582303Y/en not_active Expired - Fee Related
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106605376A (en) * | 2014-08-18 | 2017-04-26 | 高通股份有限公司 | Using known geographical information in directional wireless communication systems |
| CN106605376B (en) * | 2014-08-18 | 2021-01-01 | 高通股份有限公司 | Method and apparatus for using known geographical information in a directional wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN2582301Y (en) | 2003-10-22 |
| CN2582303Y (en) | 2003-10-22 |
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