CN2792033Y - A primary station utilizing beam forming and sweeping for conmmon and dedicated channels - Google Patents

Abstract

The utility model relates to a master station for transmitting and receiving communication, which is arranged in a segmented basic cell with at least one second station. The master station comprises a wave beam generating and forming unit, an antenna and a wave beam guiding unit, wherein the antenna is used for transmitting and receiving signals of wave beams. Formed wave beam systems are directed continuously or discontinuously to a plurality of directions which are determined in advance.

Description

Use beam forming and scan the main platform that reaches dedicated channel in sharing

(1) technical field

The utility model uses beam forming and scans the main platform that reaches dedicated channel in sharing about a kind of.

(2) background technology

Forming section for for the long distance coverage area is provided in indivedual cell element stations, has been a known technology, and can cooperate " clever antenna (smart antenna) " and reach.The method of clever antenna is the emission mode that changes this antenna dynamically forming one " wave beam ", and this wave beam is the energy that transmits and received that focuses on this antenna especially, and a required landform covering scope is provided.And beam forming is to be the booster action in the section moulding of the whole section of direction and width-adjustable.Two kinds of technology all are used for: 1) reduce being deployed in interior cell element of cell element and the interference between wireless transmission/receive unit (WTRUs); 2) increase admissible scope between a receiver and a transmitter; And 3) geographical position of location one WRTU.As long as the general position of these technology is known, then it is applied to the dedicated channel of this WRTUs usually.

Before the position of learning a WTRU, this shared channel can propagate all WTRUs the information that may receive.When this information can be sent out in static section, it will can not sent in variable wave beam.In this approach, exist an intrinsic inefficiency step, promptly need extra step could determine to be used for the suitable wave beam of special-purpose data exchange.In addition, this wave beam must reach greatly and just can provide broad coverage area usually, and this energy that will cause them with this transmitter have one apart from the time can be lower.Under these situations, they must use higher energy, have long symbol time and/or how full and accurate code scheme to contain identical scope.

In the prior art, the covering scope of this shared channel is to be shown among first figure, and it has four wide area wave beams that overlap each other.When this cell element station is given certain degree when utilizing, this provides the covering scope of isotropic directivity, it is also by having a single identification unit in the transmission of each section, give with the directivity that a rough and careless degree is provided and detect one of them this WTRUs (WTRU1 and WTRU2) of this transmitter.

See also Fig. 2, it is the downgoing line dedicated beams that shows between Yi Zhutai (P) and several WTRUs (WTRU3 and WTRU4).The energy of supposing to be derived among Fig. 1 and Fig. 2 this main platform P is identical, and other characteristic is identical, then in the distance of this shown WTRUs of Fig. 2 (WTRU3 and WTRU4) and this main platform P greater than this shown WTRUs of Fig. 1 (WTRU1 and WTRU2).Alternatively, this covering scope can be by reducing this character rate or increasing this error recovery sign indicating number and roughly the same.These methods transfer rate that for a moment reduces this data wherein.This also can be applied to the receiver uplink beam pattern of this main platform P, and about the identical comment of covering scope and be applied to selection from this WTRUs to the identical data of this main platform P.

In the prior art, the scope of a main platform P or a WTRU usually can be by in conjunction with higher-energy, low character rate, error recovery sign indicating number and real-time diversity frequency or space.Yet these methods can cause the wrong poor efficiency of best behaviour to carry out.In addition, it is inharmonious to understand generation between shared and dedicated communication channel, thereby this covering scope can be calibrated in this way.

This downgoing line dedicated channel can have in the wave beam of narrower frequency range one, is transmitted by a clever antenna, and should be than narrow beam service one narrower zone.The advantage that this wave beam is narrowed is, in other zone of this cell element, can reduce to the interference of WTRUs, and this has the impact in a front to system effectiveness.Yet the interference that dedicated channel is still produced easily from sharing channel influences.Should share channel must can be found by all mobile phones in whole coverage area.Fig. 3 shows the general scheduled transmission pattern that is used for a cellular system, it is to utilize in the dedicated channel covering scope, one clever antenna system is launched the narrower frequency range wave beam that a tool is contained a little covering scope 10, and should share in the channel covering scope, see through an omnidirectional antenna of wide coverage area 12 emissions one omni-directional mode.Since should share channel be to be transmitted at a high power output, determine complete cell element covering scope, then this dedicated channel of being received of a WTRU can be disturbed, when the position of this WTRU becomes near this high-octane shared channel transmission device.

Therefore, it need provide a method, and it can be in wireless telecommunication system, to share and dedicated channel both fair covering scope is provided, but do not have the shortcoming of prior art.

(3) utility model content

The purpose of this utility model provides that a kind of to use beam forming and scan in sharing be the main platform of dedicated channel, and described main platform transmission communication is at least one second and receive from least one second communication.The utility model can solve the following defective of prior art: before the position of learning a WTRU, shared channel can blaze abroad the information that all WTRUs may receive.When this information can send in static section, this information just can not send in variable wave beam.In this approach, exist an intrinsic inefficiency step, promptly need extra step could determine to be used for the suitable wave beam of exclusive data exchange.In addition, the downgoing line dedicated channel can be by a clever antenna and have one and to transmit in the wave beam of narrower frequency range, should serve in this narrower zone than narrow beam.Yet the interference that dedicated channel still is subjected to producing from this share channel easily influences.

Solution of the present utility model be to propose a kind of be used to transmit share and the dedicated channel communication at least one second and reception sources from this and should the sharing and the main platform of dedicated channel communication of platform, wherein this second is to be arranged in one to have utilized at least one wave beam that is derived from an antenna to form the cell element of section.This main platform comprises that one produces and form the device of this wave beam; And one scan this formed the device of wave beam.This scanning means can optionally form this a plurality of directions of beam position.

Advantage of the present utility model be can be in wireless telecommunication system to share and dedicated channel both fair covering scope is provided, but but do not have the shortcoming of prior art.

(4) description of drawings

Fig. 1: it is to show in the prior art, between a main platform and have shared channel between several WTRUs of four overlapped wide area wave beams and contain and plan;

Fig. 2: it is to show in the prior art, uses the exclusive wave beam of downgoing line between the WTRUs of exclusive wave beam to plan between a main platform and several;

Fig. 3: it is to show in the prior art, the emission mode that is used for a cellular system, it is to utilize a narrow frequency range wave beam of containing a little coverage area in the exclusive channels covering scope, and should share an omni-directional mode that contains a wide coverage area in the channel covering scope;

Fig. 4: it is to show from a rotation of a main platform emission to share channel beam;

Fig. 4 A: it is the scanning flow chart that shows this shared signal channel;

Fig. 5: it is a beam configuration that shows the uneven distribution of known WTRUs;

Fig. 6: it is to show the beam configuration with the wave beam frequency range that can adjust according to the data flow form;

Fig. 7: it is to be shown in special-purpose and shared channel, has a beam configuration figure in identical covering scope zone;

Fig. 8: it is to be shown in special-purpose and shared channel, has the beam configuration figure in identical covering scope zone;

Fig. 9: it is to be shown in the preferred embodiment, the flow chart that this shared signal channel is scanned;

Figure 10: it is to be shown in the preferred embodiment, and single shared signal channel is transferred to the flow chart of the diverse location of a cell element; And

Figure 11: it is the calcspar that shows main platform and second communication link.

(5) embodiment

The present invention will explain with icon and relevant legend.The argumentation that the relevant wave beam in front forms all can be used for the transmission and the reception of signal.For instance, narrower transmission wave beam causes less interference for the device outside this wave beam, and is opposite, and narrower received beam reduces interference from the outer device of this wave beam.The relevant argumentation of the present utility model in front all can be used for the transmission and the reception of signal.

The utility model is the covering scope about wireless telecommunication system, and wherein this wireless telecommunication system uses the intelligent antenna emission to share and exclusive band, and provides similar covering scope for shared and dedicated channel.Share channel as its name, all devices all can use its wave band, and system and method planning described in the utility model is shared channel in same pattern, and provides useful information to set up dedicated channel to system and WTRU.

See also Fig. 4, the possible position P1-Pn that the autonomous platform of channel beam B (BS) emits is shared in the dotted line representative, and at a certain specific time point, wave beam B exists only in a position P1 of solid line among the figure.Arrow represents that wave beam B changes direction in time.In this figure, wave beam B moves to the P2-Pn position with sequential in a clockwise direction from the P1 position, though counterclockwise moving also can.

System assists identification at each locational wave beam B of P1-Pn.Fig. 4 A is the flow chart of being drawn according to the method 40 of the utility model one preferred embodiment of Fig. 4, and the identification wave beam B that is transmitted (comprising the single identification unit that wave beam B is had on each position of P1-Pn) is scanned (step 41) along honeycomb.For instance, when primary importance P1 then the I1 of one first identification unit will be transmitted, when second place P2 then the I2 of one second identification unit will be produced, all the other P3-Pn positions all are like this.If wave beam B is by continuous sweep, the different I1-Im of identification unit also can rotate the number of degrees and produced along with each.

When successfully obtaining signal, a WRTU shares channel (step 42), it just can notify the identification unit number of the resultant shared channel of PS (step 44), system uses the position (step 46) of this notice with decision WTRU, PS then just can specify a dedicated channel (step 48) in the suitable direction of WTRU, because share channel only in one extremely short period of each fan-shaped stop, therefore share the channel cause and just reduced in a large number to the interference that produces frequently for special use.Perhaps, a less important shortcoming is the prolongation of required time, but this shortcoming can weaken the effect by increasing the data rate of sharing channel.

Second preferred embodiment of the present utility model be by service time flag as the kenel of identification unit position with the P1-Pn of identification wave beam B.All can notify PS wave beam B to be detected by WTRU no matter send time flag or identification unit back to PS, and at this section in the middle of the period, PS is just known the position of the P1-Pn of the wave beam B that can link up with WTRU, yet, it should be noted that, since the generation of reflection may, be not certain from the method for PS to WRTU.

The 3rd preferred embodiment of the present utility model be by service time synchronous method as the kenel of identification unit position with the P1-Pn of identification wave beam B, wave beam B indicates with a time flag of understanding thoroughly.A kind of mode that reaches this purpose is that WTRU and PS all have the right to use to same time reference, for example the network time of global positioning system (GPS), American National Standard and technical college (National Institute ofStandard and Technology) or airtime (WWV) or through suitable adjusted local lock in time.

The 4th embodiment in order to the position P1-Pn of identification wave beam B is used for WTRUs and PS does same step calibration to the timing mark that sends from communal facility.WTRUs can detection beam transmit with identification PS, but need not detect the position P1-Pn of other wave beam B.By the time factor of the PS that repays when the WTRU detection beam B, PS just can determine the reference of which wave beam B as WTRU.The benefit of this embodiment is to share the channel transmission does not need to bear the position P1-Pn of unnecessary data with identification wave beam B.

The 5th embodiment in order to the position of identification wave beam B is used for the gps receiver that WTRU inside is comprised.WTRU then determines the geographical position by latitude and longitude, and information is repaid to PS.PS then can use this information accurately to produce direction, beamwidth and the intensity of wave beam B.Another advantage of this embodiment is to be that WTRU obtains position accurately, and this advantage can allow the user when needed WTRU to be done the location.

With reference to Fig. 5, beam modes may make an amendment according to the demand of system operator.Under this situation, PS can place wave beam B a pattern with WTRUs in special area expection consistent in density.Lift and to say that in fact an angle pencil of ray W1, W2, W3 can be projeced into P1, P2, P3 respectively along with minority WTRUs, and more narrow beam N4, N5, N6 can be projeced into P4, P5, P6 respectively along with minority WTRUs.This promotes the more manufacturing of narrow beam B in the comparatively dense zone, and the use capacity of also promoting the uplink of common frequency channel and downlink is to set up the initial communication facility.

Beamwidth operation preferably can executed in real time, yet, the dosage and the associated beam width pattern of the situation of communications facility and the classification of application decision beam. position P1-Pn quantity.Forming beam modes should can not need excessive handover to other wave beam to control so that enter and leave the quantity of WTRUs wave beam by the enough width of tool.The device of a static state can be with the narrow beam of light service, is example with the car of fast moving, and narrow beam can not be served when vertical with the stream of advancing effectively, but but can provide service when parallel with direct of travel.A narrow vertical beam can only satisfy the service of news in brief breath, can not do the sound service as phone.

Another advantage of using the different beams width is the classification that WTRUs moves in the zone.With reference to Fig. 6, be depicted as a building B L (mainly representing a zone to have the pedestrian's speed device WTRUs that moves at a slow speed), and the high road H of a high speed (mainly representing a zone to have fast moving device WTRUf).Install WTRUs at a slow speed and can change another angle with narrow beam N1-N3 service when the communication period is hindered, fast moving device WTRUf need be than broad beam W1-W3 to support communications facility.

Beamwidth is moulding also to lower when from a wave beam B to another wave beam B the frequency that WTRUs automaticallyes switch.Automatic switchover will need be used more system resource than traditional communication facility, because when the automatic switchover situation takes place, two independent communications link and must keep.Wave beam automaticallyes switch and also should avoid, because the audio communication facility more was impatient at along with the frequent time of delay that automatic switchover brought.

Data, services is relevant with packet size and quantity.Though the big package that quantity is automaticallyed switch in the transmission of several little packages, needs with ging wrong significantly may use excessive frequency range, rebulids when trying after automatic switchover when linking, this situation will take place.Do most the transmission when having tried exhibition performance transmission reliably when same data, frequency range also may be depleted.Downlink is shared the channel communications facility and is all followed hard on the uplink transmission usually, and by the transfer mode of knowing PS, WTRU can determine reasonable time to send the uplink transmission.In order to show necessary sequential, known correction or airtime relation are employed.In the case of revising relation, WTRU uses common timing clock, and WTRU can wait for up to PS section by WTRU before transmission and form a wave beam.In the case of airtime relation, PS informs when WTRU sends his uplink signal.Being formed with of uplink and downlink wave beam may may be not overlapping yet, usually avoid overlapping meeting to have superiority, so that under the period, device has in response to also wanting less time to wait for the sequential cycle that the entire antenna wave beam forms than needs transmission in same propagation.

What must propose explanation is that CMDA and other RF communications protocol have been used some timesharing forms.When these temporary transient communal facilitys being done response, the propagation period of the segmentation of wave beam and communications protocol is all very important, the RF communications protocol of other non-time correlation, and for example time slot Aloha formula (slotted Aloha) only involves part charge.

The embodiment of Miao Shuing points to the wave beam B of scan ring around PS under situation in proper order hereinbefore, and in many examples, this will be a mode of typically carrying out most convenient of the present invention.Yet, many selective methods are arranged to obtain different positions, for instance, in zone to a certain degree, can have more coverages situation be to be worth expectation, this can produce wave beam and reach in the position sequence of sequential that is ranked.For instance, if seven positions (from 1 to 7) are arranged, can use the sequence of (1,2,3,4,2,5,6,2,7,1), it is more frequent than other position that this can allow a zone cover No. 2, beam. position, but life period is identical.With sequence (1,2,3,4,4,5,6,7,1) is example, and beam. position will have for No. 4 twice period to remain unchanged.Any suitable ordering can be used and revise according to making according to the analysis of position.

Similarly, concerning the pattern of a circulation, unnecessary restriction beam. position.Beam. position can produce the operation with the communication for service system under any sequence.For instance, a wave beam B who distributes in time is so that the pattern that each quadrant has at least a wave beam B to cover, may be to the WTRUs near PS be useful, and might be exceeded a beam. position and cover.

It should be noted that with all RF transmission similarly, a RF signal stops at entity point (physicalpoint), if the obstacle of faraday's type is arranged, (for example grounded metal top).Usually this signal disappears in succession, and its boundary then is some decline numerical value that are defined that come by weak transmission numerical value.In order to provide suitable scope in the middle of enforcement of the present invention, adjacent beam. position the pick of overlaid.This is overlapping will to tend to become more significantly near this transmission and reception antenna.As if approach the position of a foundation structure antenna, therefore any one WTRU may communicate by letter by several different location wave beam B of mat.Therefore, if need, can be through several beam. position and communicating devices has been to use these multiple positions, finished higher fast data speed.Yet except that this, this device more can be used to only communicate in the moment by wave beam, and need can obtain other technology, for example long quiescent time, the just higher data speeds that can obtain.

With reference to figure 7, be to be an embodiment, wherein should share signal channel be to see through one to be divided into n P position, was designated as P1 to Pn, cell element and be scanned.Each position P represents a different shared channel beam B.One WTRU is positioned at beam. position P3 one PS then in the central authorities of this cell element.

With reference to 9, one programs relevant with the utility model preferred embodiment among Fig. 7 of figure is to be presented.Program 81 beginnings are through position P1 to Pn and around this cell element scanning (step 91) as sharing beacon channel.The physics location of each position P representative antennas focused energy and unique distinguished symbol of sharing beacon channel signals thereof.A WTRU who is located in this cell element area obtains the shared beacon channel (step 92) of a uniqueness.This WTRU then writes down back PS (step 94) with obtained distinguished symbol.PS receives distinguished symbol that comes from WTRU and the position (step 96) of determining this WTRU.This WTRU then specifies a dedicated channel (step 98) to this WTRU direction.

Another embodiment of the present utility model is to find expression in Fig. 8, and it is included in the scope zone that has a shared channel beam in each section and need not scan cell element.Though this selects to have increased a little the interference in the cell element, it provides the scope zone of equal number to sharing and dedicated channel.As shown, this PS has eight position P1-P8, different unique beacon channel signals of sharing that each representative is not scanned.One WTRU is positioned at position P4.

With reference to Figure 10, a replacement program 100 relevant with the utility model embodiment of Fig. 8 is to be presented.The shared beacon channel signals of eight uniquenesses is transferred into the position P1-P8 (step 101) of cell element.The physics location of each position P representative antennas focused energy and unique distinguished symbol of sharing beacon channel signals thereof.A WTRU who is located in this cell element area obtains the one (step 102) of shared beacon channel of these eight uniquenesses and the wave beam that this WTRU then will be taken from the wave beam distinguished symbol writes down back PS (step 104).PS receives this distinguished symbol that comes from WTRU and the position (step 106) of determining this WTRU.This PS then specifies a dedicated channel (step 98) to this WTRU direction.

A WTRU be located in two or more the multi-region section on or only be its etc. the edge near the time case in, this WTRU may have the puzzlement that is difficult to its associated section of identification.When this WTRU obtains a section, this system promptly launches a hysteresis in its algorithm of controlling, so that determine that this WTRU has one can received signal quality in time before this WTRU skips to another section.

Should be person skilled in the art person and be appreciated that, number of beams or be arranged in as the beam. position number on the cell element described herein and be used in various examples.More or less number of beams, or the beam. position amount can be implemented not taking off under spirit of the present invention and the scope.

With reference to Figure 11, by RF link 104 and with main platform 100 that level platform 102 communicates be to be presented.This main platform 100 comprises one and is linked to one and can controls on the RF of antenna 108/down-converter 106.This RF transconverter 106 more is connected in a control unit 110, and it is to have a beam shaping elements 112, one received signal analytic units 114, one wave beams to control a unit 116 and a central controller 118.Have the knack of this skill person and should be appreciated that about controlling antenna and beam forming be known by person skilled in the art person.So, after only further being discussed at about the details that this can control antenna 108, beam shaping elements 112 and wave beam control unit 116 of the present invention.Main platform 100 is accepted by sharing and the specified signal of dedicated channel, and it is graphically showed with dedicated channel 122 to share channel 120.These channels 120,122 see through RF binding 104 the most at last and are sent to secondary 102 by main platform 100.

This beam shaping elements 112 is determined needed these beam shapes and is controlled this and can control be shaped the wave beam of a correspondence of antenna 108.Similarly, this wave beam is controlled unit 116 control antennas 108 so that this wave beam can directly be directed to needed direction.This received signal analytic unit 114 is analyzed and how to be transmitted this signal and analyze this signal with definite this secondary 102 by secondary 102 received signal is to being transmitted by where.This central controller 118 is regulated this beam shaping elements 112, this wave beam control unit 116 and this received signal analytic unit 114 so that this antenna 108 can suitably be controlled.

In operation, these central controller 118 control antennas 108, this beam shaping elements 112 and this wave beam are controlled unit 116, so that this main platform 100 transmits shared channel 120 signals to this secondary 102 certainly.One by secondary 102 in response to and the signal that reaches main platform 100 is to be accepted at antenna 108, play this RF transconverter 116 of circle and down conversion and this received signal analytic unit 114 of mat analyze, it has determined this direction of secondary 102.This central controller 118 then commands this antenna 108, this beam shaping station 112 and this wave beam to control unit 116 so that transmit a dedicated channel 122 to this secondary 102.

Claims (4)

1. one kind is used beam forming and scans the main platform that reaches dedicated channel in sharing, this main platform in order to transmission communication at least one second and receive from least one second communication, this main platform utilizes at least one wave beam and transmits a plurality of shared channels of containing a honeycomb and having a plurality of sections, it is characterized in that this main platform comprises:

One antenna that can control is shared channel beam in order to produce one, transmits one first signal, and receives in response to a cognitive signal that is derived from this first signal of one second;

One wave beam is controlled the unit, can control antenna and optionally with a plurality of directions of this beam position in order to control this; And

One wave beam analytic unit in order to analyze this cognition signal, reaches and determines this position of second according to this analysis, and by this, this main platform is according to this analysis and with this second of a dedicated channel beam position.

2. main platform as claimed in claim 1 is characterized in that, comprises that also a wave beam forms the unit, and this can control antenna its may command, with this wave beam is formed into from the narrow width of a wide degree to a plurality of select width one of them.

3. main platform as claimed in claim 1 is characterized in that, this at least one direction is consistent with this at least one section of this cell element.

4. main platform as claimed in claim 3 is characterized in that this section has different sizes, and this wave beam forms unit controls, and this can be controlled antenna and contains this cell element section to form this wave beam.

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