CN100525537C - Method and apparatus for using switched multibeam antennas in a multiple access communication system - Google Patents

Abstract

In order to increase a capacity, or a number of mobile stations (MSs), or users, that may engage in concurrent communication sessions, a communication system (100) is provided that schedules a different MS, or user, (110-112) in each beam of multiple predetermined, fixed beams (160-165) associated with a coverage area, for example, a sector. By simultaneously scheduling a user in each beam of the multiple beams, a performance and throughput of communication system is significantly increased over the prior art. In one embodiment of the present invention, a portion of a shared communication channel that is allocated to each MS is concurrently transmitted to each MS via a beam associated with the MS. In other embodiments of the present invention, voice channels, data channels, and control channels associated with each MS scheduled in a beam may be concurrently transmitted to each MS via the beam associated with the MS.

Description

Be used for using the method and apparatus of switched multibeam antennas at multi-address communication system

Technical field

The present invention relates to radio telecommunications system, more specifically, relate to and in radio telecommunications system, use switched multibeam antennas.

Background technology

An important goal in the design wireless communication system is a maximized system capacity, promptly maximizes the number of users that communication system can be served simultaneously.A kind of method that increases power system capacity is to use antenna system.Antenna system uses array of antenna elements wirelessly to send information to target mobile radio station (MS).The use of intelligent assembly array allows that the signal that sends is carried out wave beam and forms, and makes to send narrower, more concentrated wave beam to MS.In other words, send the amplitude and the phase place of the signal of line component every day to by adjusting, can form the wave beam of wanting.Form by the signal that sends is carried out wave beam, reduced the multipath fading of the signal that sends and to non-targeted customer's interference, this is because wave beam is concentrated narrowlyer.

The antenna system that has two kinds of main types, exchange (switched) beam antenna system and adaptive antenna system.In cellular communications system, the exchange beam antenna system is included in and uses a plurality of predetermined, fixing wave beams in the sector of sub-district.The output of a plurality of antenna modules of exchange beam antenna system merges by this way, and to form narrow, directed wave beam, it spatially is optionally.When target MS passed the sector, the information that the exchange beamformer system will be given MS exchanged to another from a wave beam.In other words, when MS is in first wave beam in a plurality of wave beams, give first wave beam with obtainable all transmit power assignment in the sector.When MS is in second wave beam in a plurality of wave beams, give second wave beam with obtainable all transmit power assignment in the sector.

Signal limitations by will sending to specific MS has been improved systematic function to the wave beam that comprises this MS, and this is because the signal limitations that will send has reduced the not observed interference of other mobile radio station in this wave beam to correct wave beam.In addition, the signal limitations that sends to specific MS is allowed to cut down transmitted power, the observed interference of (reduction) other mobile radio station thereupon to the wave beam that comprises this MS.As a result, improved power system capacity, this is that perhaps orthogonal code is reused in code division multiple access (CDMA) communication system because the reduction of disturbing allows to increase frequency reuse in time division multiple access (TDMA) communication system.

Yet, to utilize the exchange beam antenna system that beam signal is focused on the target MS that passes through the sector and begin to solve the problem that increases power system capacity, this problem is the lasting constraint to the operation of wireless communication system.Therefore, existence is obtained the needs of the method and apparatus of extra capacity improvements to being used for by utilize the exchange beam antenna system at wireless communication system.

Summary of the invention

According to one aspect of the invention, in comprising the communication system that exchanges beam antenna system, a kind of method that is used for distributing shared communication channel among a plurality of wave beams is provided, wherein said shared communication channel comprises a plurality of orthogonal codes, and wherein said method comprises: measure a plurality of propagation channels relevant with each wave beam in a plurality of wave beams; The first of described a plurality of orthogonal codes is distributed to first wave beam in described a plurality of wave beam, the second portion of described a plurality of orthogonal codes is distributed to second wave beam in described a plurality of wave beam, and wherein said first and second parts are between base station in first wave beam and the mobile radio station and the function of the measurement quality of base station in second wave beam and the propagation channel between the mobile radio station; Send signal that the orthogonal code of the described first of described a plurality of orthogonal codes expands to first mobile radio station by described first wave beam; And send signal that the orthogonal code of the described second portion of described a plurality of orthogonal codes expands to second mobile radio station by described second wave beam.

According to a further aspect of the invention, in the communication system that comprises the exchange beam antenna system that generates a plurality of predetermined, fixing wave beams, provide a kind of base station sub-system, it comprises: aerial array, and it comprises a plurality of array components; Processor, it comprises orthogonal code generator, be used to generate a plurality of orthogonal codes, wherein said a plurality of orthogonal code is assigned to shared communication channel, first wave beam of wherein said processor and a plurality of fixed beams distributes the first of described a plurality of orthogonal codes explicitly, distribute the second portion of described a plurality of orthogonal codes explicitly with second wave beam of a plurality of fixed beams, wherein said processor is based on the propagation channel mass measurement that is associated with described first wave beam and the propagation channel mass measurement that is associated with described second wave beam and distribute described a plurality of orthogonal code explicitly with first and second wave beams, and the signal that the orthogonal code of the first of wherein said a plurality of orthogonal codes is expanded sends the signal of expanding with the orthogonal code of the second portion of described a plurality of orthogonal codes by one or more first aerial arrays and sends by one or more second array components.

Description of drawings

Fig. 1 is the block diagram of communication system, and it abides by embodiments of the invention.

Fig. 2 is the block diagram that sends communication equipment, and it abides by embodiments of the invention.

Fig. 3 is the block diagram that sends a plurality of transmission signal paths of communication equipment, and it abides by embodiments of the invention.

Fig. 4 is the block diagram of the sector of communication system, and it abides by another embodiment of the present invention.

Fig. 5 is the block diagram of the sector of communication system, and it abides by another embodiment of the present invention.

Fig. 6 is the block diagram of the sector of communication system, and it abides by another embodiment of the present invention.

The logical flow chart of Fig. 7 step that to be communication system carry out when transmitting information via exchange beam antenna system each mobile radio station in a plurality of mobile radio stations, it abides by embodiments of the invention.

Embodiment

For improving by in wireless communication system, utilizing the exchange beam antenna system to obtain extra capacity, a kind of communication system is provided, its with a plurality of predetermined, fixing wave beam that covering domain (particularly sector) is associated in the different MS of each beam dispath, or user.By dispatched users side by side in each wave beam in a plurality of wave beams, prior art relatively, the performance and the throughput of communication system are significantly increased.In one embodiment of the invention, will send to each MS concomitantly via the wave beam that is associated with MS for a part of shared communication channel that each MS distributes.In other embodiments of the invention, can be with the voice channel, the data channel that are associated with each MS of dispatching in the wave beam, send to each MS with control channel concomitantly via the wave beam that is associated with MS.

Usually, embodiments of the invention comprise such method, its each mobile radio station that is used in a plurality of mobile radio stations of communication system transmits user profile, this communication system comprises a plurality of mobile radio stations and exchange beam antenna system, wherein exchange beam antenna system and comprise architecture and a plurality of wave beam, it is used for sending user profile to a plurality of mobile radio stations from architecture.This method comprises the different mobile radio stations in a plurality of mobile radio stations of scheduling, side by side to use each wave beam in a plurality of wave beams basically.

Another embodiment of the present invention comprises base station sub-system, and it can be operated in comprising the communication system that exchanges beam antenna system, and it generates a plurality of predetermined, fixing wave beams.Base station sub-system comprises aerial array, it comprises a plurality of array components, also comprises a plurality of weighter, and each weighter in wherein a plurality of weighter is connected to an assembly in a plurality of assemblies, also comprise processor, it is connected to each weighter in a plurality of weighter.Processor sends first group of weight coefficient to weighter, information is sent to first mobile radio station in a plurality of mobile radio stations, and further send second group of weight coefficient to weighter, information is sent to second mobile radio station in a plurality of mobile radio stations, wherein weighter is utilized first group of weight coefficient, is sent to first mobile radio station by first wave beam in a plurality of wave beams, and wherein weighter is utilized second group of weight coefficient, sent to second mobile radio station by second wave beam in a plurality of wave beams.

Can the present invention be described more fully with reference to Fig. 1-7.Fig. 1 is the block diagram of wireless communication system 100, and it abides by embodiments of the invention.Communication system 100 comprises the fixed wireless architecture, and it comprises base station sub-system (BSS) 102.BSS 102 provides communication service to each of a plurality of mobile radio stations (MS) 110-112 that is arranged in the service covering domain (or sub-district) 150 of being served by this BSS.Sub-district 150 is divided into a plurality of geographic sector area 151-153 (having shown three).BSS 102 comprises a plurality of base station transceivers station (BTS) 104,105 (having shown two), and each BTS is connected to antenna 114 via duplexer.Each BTS 104,105 provides communication service via each air interface 116-118 to the MS110-112 of the sector 151-153 that is arranged in the sub-district of being served by BTS 150.Each air interface 116-118 comprises a plurality of communication channels, and it comprises at least one Packet Data Channel, shares Packet Data Channel, pilot channel, paging channel and synchronizing channel.

Antenna 114 is directional antennas, and it is divided into a plurality of antenna sectors 120,130,140 (having shown three), and each sector in wherein a plurality of antenna sectors is corresponding to a geographic sector area among a plurality of geographic sector area 151-153, and provides communication service to it.Each antenna sector 120,130,140 comprises aerial array, and it comprises a plurality of antenna modules (each array has shown two).For example, antenna sector 120 comprises antenna module 121-122, and antenna sector 130 comprises antenna module 131-132, and antenna sector 140 comprises antenna module 141-142.By utilizing aerial array to the MS transmission signal that is positioned at by the sector of this aerial array service, BSS 102 can utilize the beam-forming technology of exchange wave beam to send signal.For example, as shown in Figure 1, each sector 151-153 is associated with a plurality of fixing, predetermined wave beam 160-165, promptly, sector 151 is associated with wave beam 160 and 161, and sector 152 is associated with wave beam 162 and 163, and sector 153 is associated with wave beam 164 and 165; Yet those of ordinary skills recognize that the wave beam number that is associated with each sector is arbitrarily, depends on the designer's of communication system 100 judgment.Each wave beam 160-165 is predetermined, fixing, and non-self-adapting is shaped, directed, and the MS that is used for comprising in this wave beam by BSS 102 sends signal.

BSS 102 further comprises scheduler 106 and base station controller (BSC) 108, and it is connected respectively to each BTS 104,105 among the BSS 102.In another embodiment of the present invention, scheduler 106 can be included in the BSC 108.Optimization wave beam among a plurality of wave beam 160-165 that scheduler 106 is determined to be utilized by BSS 102 (that is, by the BTS 104 of BSS 102) is to send signal to the MS by this BTS service.

Preferably, communication system 100 is code division multiple access (CDMA) communication systems, it comprises the communication channel of a plurality of quadratures, although those of ordinary skills recognize the present invention and can be used in any wireless communication system, for example time division multiple access (TDMA) communication system or OFDM (OFDM) communication system.Preferably, each communication channel in a plurality of communication channels comprises one or more in a plurality of orthogonal intersections, for example Walsh sign indicating number.The use of spreading code allows a plurality of communication channels to coexist as identical frequency band.

Fig. 2 is the block diagram of BTS 104,105, and it abides by embodiments of the invention.Each BTS104,105 is connected at least one aerial array 120,130,140 that is associated with BSS 102, and for example array 120, and comprises transmitter part 202 and receiver part 204, and it is connected to array via the duplexer (not shown) respectively.In transmitter part 202 and the receiver part 204 each further is connected to processor 206, for example other the such equipment known to one or more microprocessor, microcontroller, digital signal processor (DSP), its combination or those of ordinary skills.Processor 206 further is connected to, and/or comprise, one or more memory device that is associated 208, for example random-access memory (ram), dynamic random access memory (DRAM) and/or read-only memory (ROM) or its equivalent, data and program that its storage can be carried out by processor.Processor 206 and the memory device 208 that is associated allow BTS 104 preservation information, calculate, and runs software program.

Fig. 3 is the block diagram of a plurality of transmission signal paths 300,301 of each BTS 104,105, and it abides by embodiments of the invention.Each send signal path 300,301 corresponding to one of a plurality of array components (for example array component 121 and 122) of this BTS associated antennas array (for example aerial array 120).Data offer BTS 104 by data source 210 (for example with such as external networks such as public switch telephone network (PSTN) or internets interface) or the application that operates on the processor 206 of BTS.

Data source 210 is connected to processor 206.As shown in Figure 3, processor 206 comprises encoder 302, a plurality of frequency multipliers 306,308, and a plurality of symbol mapper 310,312.Encoder 302 receives data and utilizes predetermined encoding scheme (for example grouping encoding protocol or convolutional encoding scheme) coded data from data source 210.Encoder 302 sends coded data to each in a plurality of frequency multipliers 306,308 thereafter.In another embodiment of the present invention, processor 206 can further comprise interleaver, before coded data being sent to a plurality of frequency multipliers 306,308, and the data of this interleaver interweaving encoding.

Each frequency multiplier in a plurality of frequency multipliers 306,308 is connected to spectrum-spreading code generator 304, and the data of spreading code (the being preferably the Walsh sign indicating number) spread spectrum coding that provides according to spectrum-spreading code generator.The spreading code that spectrum-spreading code generator 304 generates depends on the MS that data will be sent to, and this is because BSS 102 distributes different spreading codes to each MS of the same sector that is arranged in a plurality of sector 151-153.Each frequency multiplier 306,308 sends spread spectrum data to each symbol mapper in a plurality of symbol mapper 310,312 thereafter.One of a plurality of symbols that each symbol mapper 310,312 comprises data map in the symbol constellation are to produce the corresponding symbols streams of data with modulation.In one embodiment of the invention, symbol mapper 310,312 utilizes quadrature amplitude modulation (QAM) mapping scheme to come mapping (enum) data.Yet, the mapping scheme that uses is not critical for the present invention, and those of ordinary skills recognize, can use many kinds of mapping schemes here, for example bi-phase shift keying (BPSK) or quadriphase PSK (QPSK), and do not depart from essence of the present invention and scope.Behind symbol mapper 310,312 modulating datas, processor 206 sends the data of modulation to transmitter part 202 for transmission.

Transmitter part 202 comprises a plurality of modulators 314,316, and it is connected respectively to one of a plurality of amplifiers 318,320.Transmitter part 202 further comprises a plurality of weighter 322,324, and it is connected between one of one of a plurality of amplifiers 318,320 and a plurality of antenna 121,122, and further is connected to processor 206.Each modulator in a plurality of modulators 314,316 receives the data of modulating from each symbol mapper 310,312, and the data-modulated of modulation is arrived radio frequency (RF) carrier wave.Thereafter, send the carrier wave of each modulation to be connected to each modulator 314,316 amplifier 318,320, it amplifies the carrier wave of modulation, produces amplifying signal, and sends amplifying signal to each weighter 322,324.Each weighter 322,324 is modulated amplifying signal based on the weight coefficient that is offered weighter by processor 206, and sends amplifying signals via each antenna 121,122.In other embodiments of the invention, each weighter 322,324 can be placed between modulator 314,316 and the amplifier 318,320, perhaps can place before the modulator 314,316, and place within the processor 206.

For optimizing the intensity of the RF signal that receives from the BTS 104,105 that serves this MS by target MS (for example MS 110), and minimizing RF signal and BTS with the interference of communicating by letter between other the movable MS in the sector of this BTS service, each BTS 104,105 adopts the beam forming technique of exchange wave beams to send the RF signal.The beam forming technique of exchange wave beam allows BTS based on the weight coefficient of being distributed to by this BTS with each assembly 121,122 of this BTS associated antennas array, sends the signal of straitly concentrating to target MS 110.

Current and code division multiple access (CDMA) communication system of proposing, for example 1XEV-DV (data and speech) system and HSDPA (high speed downlink packet access) system comprises a plurality of communication channels in the air interface between MS and BSS respectively.At a plurality of interchannels shared communication channel is arranged, that is, share Packet Data Channel, it can be shared between a plurality of MS by same BSS service.Abide by 1XEV-DV and HSDPA standard, communication system 100, particularly scheduler 106, preferably use Carrier interference ratio (C/I) feedback from MS, with the use of scheduling MS 110-112 to shared Packet Data Channel.In to the scheduling operation of sharing Packet Data Channel, scheduler 106 considers (1) selects which MS among a plurality of MS to dispatch, to be used for sharing Packet Data Channel; (2) select encoder packet size for MS; (3) selection will be distributed to some Walsh sign indicating numbers of MS.Shared Packet Data Channel among the 1xEV-DV can carry out code division multiplexing (2 user CDM) between two users, and the shared Packet Data Channel of HSDPA can carry out code division multiplexing (4 user CDM) between four users.Although the 2 user CDM that following discussion will only be supported at 1xEV-DV, those of ordinary skills recognize that the notion of being discussed is equally applicable to the situation of 4 user CDM.

Can following definite C/I feedback.Each MS among a plurality of MS 110-112 is undertaken relevant by the signal that will receive from assembly and the known version of this signal, measure the propagation channel between the array component of MS and BSS 102.For example, BSS 102 can send pilot code via assembly, for example predetermined pilot tone Walsh sign indicating number, perhaps oneself sequence of pilot symbols of distributing to assembly of knowing of MS.When signal that MS receive to send, MS carries out relevant with known pilot code or symbol the signal that receives.Thereafter, based on this relatively, MS determines the signal distortion owing to channel.

The auto-correlation of measuring ambient interferences is more difficult.In one embodiment of the invention, the signal that each MS 110-112 receives from BSS 102 by demodulation, and deduct the signal of demodulation from the signal that arrives, measure the auto-correlation of ambient interferences.The signal that produces only comprises ambient interferences, and the auto-correlation of this signal can relevantly easily obtain by this signal and himself are carried out.In another embodiment of the present invention, periodically with a bit of time of the signal blockage of its transmission, MS can measure auto-correlation by BSS 102.At the pent a bit of time durations of signal that sends, the signal of reception only comprises ambient interferences.In addition, can be relevant by this signal and himself are carried out, measure the auto-correlation of disturbing.

In another embodiment of the present invention, each MS 110-112 can measure the auto-correlation of ambient interferences by relevant (by carrying out relevant with himself this signal) of the signal that is sent by BSS 102 that measure to receive.Should relevant be signal correction function and interference correlation function sum.MS sends to BSS 102 with the signal correction function of dissemination channel information and reception,, serves the BTS of this MS that is.BSS 102, preferably serve the processor 206 of the BTS of this MS, and (for example, pilot signal) knowledge is the calculated signals signal correction of the observed transmission in MS place based on the signal of propagation channel and transmission.Thereafter, deduct by correlation function from the signal that receives transmission signal calculate relevant, obtain to disturb relevant.

Use in a plurality of array components of BSS 102 each with a plurality of MS 110-112 that serve by this BSS in each between the knowledge of propagation channel, and the interference environment at each MS place, BSS 102 determines signal to noise ratio (snr) by each MS place of this BSS service for power division, and further from many groups weight coefficient, determine one group of weight coefficient, organize weight coefficient more and correspond respectively to a plurality of fixed beams that are associated with the residing sector of MS.For example, the memory device 208 of BTS of service MS can be stored many group weight coefficients, a wave beam in a plurality of wave beams that every group of weight coefficient in wherein many group weight coefficients is associated corresponding to the sector with this BTS service.The processor 206 of BTS selects to produce one group of weight coefficient of maximum S R thereafter, although other standard that is used to select one group of weight coefficient for known to those of ordinary skills, and can be used for herein, and does not depart from essence of the present invention and scope.Work as BTS, for example BTS 104, and when the MS by this BTS service sent signal, the processor 206 of BTS sent suitable weight coefficient to the weighter 322,324 of BTS thereafter.Each weighter 322,324 uses the weight coefficient that sends weighter to by processor 206 to modulate the signal that sends by corresponding antenna arrays row assembly thereafter, and this signal sends in a plurality of fixing, predetermined wave beams via the array component of correspondence thereafter.

Referring now to Fig. 4, explained the block diagram of the sector 400 (for example sector 151-153) of communication system 100, it abides by embodiments of the invention.Sector 400 comprises a plurality of wave beams 401,402 (having shown two), and it is sent by aerial array (for example aerial array 120,130, with 140) and the BTS 104 that is associated with this sector.With similar among the 1xEV-DV, the BTS of serving sector and the air interface that is arranged between each of MS (being MS 110 and 111) of this sector comprise shared Packet Data Channel, and it supports two users' code division multiplexings (CDM) also to share between two users or MS.

Be the capacity of increase communication system 100, or increase the number of users that participates in communication session simultaneously, this communication system, particularly scheduler 106, different MS or the users of each beam dispath in a plurality of wave beams 401,402 in sector 400.By the dispatched users side by side of each wave beam in a plurality of wave beams 401,402, prior art relatively, the performance and the throughput of communication system 100 are significantly increased.In the first embodiment of the present invention, only use shared communication channel (for example sharing Packet Data Channel) to send user profile to be arranged in sector 400 MS 110,111, and on the carrier wave that is associated, do not have 1X speech or data.Make γ _{1, p}The pilot tone C/I that represents a MS (for example MS 110), it is arranged in first wave beam (for example wave beam 401), and makes γ _{2, p}The pilot tone C/I that represents the 2nd MS (for example MS 111), it is arranged in second wave beam (for example wave beam 402).Make N _PDCHThe number of the Walsh sign indicating number of shared communication channel is distributed in expression, makes P represent to distribute to total transmitted power of sector 400, and makes f _oThe coefficient (fraction) of the gross power of overhead channel (for example pilot tone, paging and synchronizing channel) is distributed in expression.

The integrality that be to keep the C/I feedback, the power of supposing transmission in each wave beam 401 and 402 be equate and also be constant.Like this, the power of distributing to each wave beam 401 and 402 is P/2.By this way, the C/I information at each MS that is associated 110 and MS 111 places is the function of conduct decay only, and can not change because of the fluctuation in the transmitted power.

If certain only dispatches single MS constantly in certain sector, and the signal that is sent to this MS sends on whole two wave beams of sector and (perhaps only sends on the user's who is dispatched wave beam, and on another wave beam, send the CDMA noise of equal power), obtainable maximum sector capacity is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}{\log }_2(1+\frac{P(1-f_o)}{N_{\mathrm{PDCH}}}\frac{1}{f_p}\max ({\mathrm{\γ}}_{1,p},{\mathrm{\γ}}_{2,p})),$

F wherein _pIt is the coefficient of distributing to the transmitted power of pilot channel.Be reduced representation, order

$\mathrm{\ζ}=\frac{P(1-f_o)}{N_{\mathrm{PDCH}}}\frac{1}{f_p}$

Like this, only dispatch single MS when carving at a time, and the signal that will be sent to MS is when sending by whole two wave beams, the capacity of sector is provided by following formula

Capacity＝N _PDCH?log ₂(1+ζmax(γ _1，p，γ _2，p)).

In communication system 100, dispatch discrete MS or user concomitantly in each in a plurality of wave beams that are associated with the sector (that is the wave beam 401 and 402 of sector 400).When the signal that will be sent to the MS 110,111 that is associated with sector beam 401,402 respectively only with wave beam that MS is associated on when sending, the capacity of sector 400 is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}(\mathrm{\α}{\log }_2(1+\frac{\mathrm{\ζ}}{\mathrm{\α}}{\mathrm{\γ}}_{1,p})+(1-\mathrm{\α}){\log }_2(1+\frac{\mathrm{\ζ}}{(1-\mathrm{\α})}{\mathrm{\γ}}_{2,p}))$

Wherein α represents to distribute to the coefficient of the Walsh code space of a MS 110, and 1-α represents to distribute to the coefficient of the 2nd MS 111.Notice that in this formula, the power of distributing to each Walsh sign indicating number at two wave beams 401 in 402 is different.

The maximum of sector 400 can obtain capacity and be provided by following formula

Capacity＝N _PDCH?log ₂(1+ζ(γ _1，p+γ _2，p))，

And this capacity is worked as

$\mathrm{\α}=\frac{{\mathrm{\γ}}_{1,p}}{{\mathrm{\γ}}_{1,p}+{\mathrm{\γ}}_{2,p}}$

In time, obtain.

The capacity increase of using 2 user CDM to produce with the exchange wave beam is provided by following formula

$\mathrm{Capacity\; Increase}=N_{\mathrm{PDCH}}({\log }_2(1+\mathrm{\ζ}({\mathrm{\γ}}_{1,p}+{\mathrm{\γ}}_{2,p}))-{\log }_2(1+\mathrm{\ζ}\max ({\mathrm{\γ}}_{1,p},{\mathrm{\γ}}_{2,p})))$

$=N_{\mathrm{PDCH}}{\log }_2\left(\frac{1+\mathrm{\ζ}({\mathrm{\γ}}_{1,p}+{\mathrm{\γ}}_{2,p})}{1+\mathrm{\ζ}\max ({\mathrm{\γ}}_{1,p},{\mathrm{\γ}}_{2,p})}\right).$

If γ _{1, p}=γ _{2, p}, the capacity increase is provided by (following formula)

$\mathrm{Capacity\; Increase}=N_{\mathrm{PDCH}}{\log }_2\left(\frac{1+2\mathrm{\&zeta;}{\mathrm{\&gamma;}}_{1,\mathrm{<figure-callout\; id="1"\; label="p"\; filenames="C200380100835E00341.png"\; state="\{\{state\}\}">p</figure-callout>}}}{1+{\mathrm{\&zeta;\&gamma;}}_{1,p}}\right),$

And this is corresponding to for shared communication channel, the increase of every Walsh sign indicating number 3dB in wanted to interfering signal ratio (SIR).

It should be noted that this is not being doubled of capacity.Be doubled for capacity when SIR increases 3dB, also need to be doubled Walsh number of codes (more generally, bandwidth).This can use Quasi Orthogonal Function (QOF is in CDMA 2000 1X standards) to accomplish by allowing for Packet Data Channel, distributes one group of QOF wherein for each wave beam 401,402.

The result, by discrete MS or the user 110,111 of scheduling in each wave beam 401 and 402, the signal that wherein will be sent to the MS that is associated with given wave beam only sends on this wave beam, sector 400 capacity become among the MS (being MS 110 and 111) with concurrent scheduling each SIR's and function, but not the peaked function of two SIR.Further, in each wave beam 401 and 402, dispatch the added advantage that discrete MS or user provide communication system, promptly, do not disturb change and in adjacent sectors or sub-district, do not introduce with C/I feedback, adaptive modulation and coding (AMC) and scheduler 106 compatibilities.

In another embodiment of the present invention, system 100 can be a CDMA 1XEV-DV system, and wherein BSS 102 sends to user profile by among the MS 110-112 of this BSS service each via Packet Data Channel and speech and data channel.1X speech and data are not transmitted on Packet Data Channel, and require some coefficients of total transmitted power in wave beam 401 and 402 each, and a coefficient of total bandwidth.And it is different that the desired power of 1X speech and data, services is provided in two wave beams.Make f ₁With f ₂The coefficient of the power of CDMA 2000 1X speeches and data (comprising pilot tone, paging and synchronization overhead) is distributed in expression respectively in wave beam 401 and 402.For example, make f ₁=1/3 and f ₂=2/3.As top, make N _PDCHThe obtainable Walsh number of codes of expression Packet Data Channel.Notice that this number does not comprise the Walsh sign indicating number that is used for overhead channel (for example pilot tone, paging and synchronizing channel) and is the Walsh sign indicating number of 1X speech and/or data allocations.

When not having CDM, when only dispatching single MS or user's receiving information signal, and this signal sends on whole two wave beams and (perhaps only sends on the wave beam of the MS that is dispatched, and on another wave beam, send the CDMA noise of equal power) time, the obtainable heap(ed) capacity in this sector is provided by following formula

Capacity＝N _PDCH?log ₂(1+ζmax((1-f ₁)γ _1，p，(1-f ₂)γ _2，p))，

Wherein ζ defines as top.

Referring again to Fig. 4, in communication system 100, dispatch discrete MS or user concomitantly in each in a plurality of wave beams that are associated with the sector (that is the wave beam 401 and 402 of sector 400).That is, dispatch a MS (for example MS 110) via first wave beam (for example wave beam 401) receiving information signal, and dispatch the 2nd MS (for example MS 111) via second wave beam (for example wave beam 402) receiving information signal.Further, the information signal that be sent to specific MS only sends to MS on the wave beam that is associated.The capacity of sector 400 is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}(\mathrm{\&alpha;}{\log }_2(1+\frac{\mathrm{\&zeta;}(1-f_1)}{\mathrm{\&alpha;}}{\mathrm{\&gamma;}}_{1,p})+(1-\mathrm{\&alpha;}){\log }_2(1+\frac{\mathrm{\&zeta;}(1-f_2)}{(1-\mathrm{\&alpha;})}{\mathrm{\&gamma;}}_{2,p}))$

Wherein α is illustrated in the N that distributes to a MS 110 in first wave beam 401 _PDCHThe coefficient of Walsh code word, and 1-α is illustrated in the coefficient of distributing to the code word of the 2nd MS 111 in second wave beam 402.Maximum can obtain capacity and be provided by following formula

Capacity＝N _PDCH?log ₂(1+ζ((1-f ₁)γ _1，p+(1-f ₂)γ _2，p))，

And this capacity is worked as

$\mathrm{\&alpha;}=\frac{(1-f_1){\mathrm{\&gamma;}}_{1,p}}{(1-f_1){\mathrm{\&gamma;}}_{1,p}+(1-f_2){\mathrm{\&gamma;}}_{2,p}}$

In time, obtain.

Like this, the exchange wave beam provides in the hybrid system with 1X speech and data and shared communication channel and only uses the shared communication channel confers similar advantages.As top, the sector capacity that the discrete user's of each wave beam in a plurality of exchange wave beams scheduling causes be MS 110 with MS 111 in each SIR's and function, be directly proportional with the coefficient of the obtainable beam power of shared communication channel, but not the peaked function of two SIR.And, in each wave beam 401 and 402, dispatch the added advantage that discrete MS or user provide communication system, promptly, disturb change and in adjacent sectors or sub-district, do not introduce with C/I feedback, adaptive modulation and coding (AMC) and scheduler 106 compatibilities.

The result of the discrete user's of each wave beam in a plurality of exchange wave beams scheduling can directly expand to and support a plurality of wave beams in every sector and/or support system more than two CDM users in every sector.As top indicating, HSDPA supports 4 user CDM, and the idea of expressing here can directly be performed in HSDPA.For example, be accompanied by four 4 user CDM that exchange wave beams and supported by HSDPA in the sector, the SIR of every Walsh sign indicating number increases can reach 6dB.

In another embodiment of the present invention, the discrete user's of each wave beam in a plurality of exchange wave beams scheduling can expand to the shared communication channel of supporting above two users' code division multiplexing, and for example HSDPA shares Packet Data Channel.Fig. 5 is the block diagram of the sector 500 of communication system 100, and it abides by another embodiment of the present invention.As shown in Figure 5, sector 500 comprises three wave beam 501-503.Make γ _{1, p}The pilot tone C/I that represents a MS (for example MS 110), it is arranged in first wave beam 501, γ _{2, p}The pilot tone C/I that represents the 2nd MS (for example MS 111), it is arranged in second wave beam 502, and γ _{3, p}The pilot tone C/I that represents the 3rd MS (for example MS 112), this MS are arranged in the 3rd wave beam 503 now, and itself and MS 110 and 111 are in the same sub-district.

As top, make N _PDCHThe number of the Walsh sign indicating number of shared communication channel (being preferably the shared Packet Data Channel that sends on each air interface 116-118) is distributed in expression.Make P represent to distribute to total transmitted power of sector.Make f _oThe coefficient of the gross power of overhead channel (for example pilot tone, paging and synchronizing channel) is distributed in expression.The power of distributing to each wave beam is constant, equals P/3.By this way, the C/I information at each MS110-112 place that is positioned at each wave beam 501-503 and can not change because of the fluctuation in the transmitted power only as the function of decay.

If for carving at a time and only dispatch single MS in the sector, and signal sends on whole three wave beams and (perhaps only sends on the user's who is dispatched wave beam, and on other wave beam, send the CDMA noise of equal power), the obtainable heap(ed) capacity in this sector is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}{\log }_2(1+\frac{P(1-f_o)}{N_{\mathrm{PDCH}}}\frac{1}{f_p}\max ({\mathrm{\&gamma;}}_{1,p},{\mathrm{\&gamma;}}_{2,p},{\mathrm{\&gamma;}}_{3,p}))$

$=N_{\mathrm{PDCH}}{\log }_2(1+\mathrm{\&zeta;}\max ({\mathrm{\&gamma;}}_{1,p},{\mathrm{\&gamma;}}_{2,p},{\mathrm{\&gamma;}}_{3,p})),$

F wherein _pDefine as top with ζ.

In the embodiment of communication system shown in Figure 5 100, dispatch discrete MS 110-112 respectively among each the wave beam 501-503 in sector 500.Further, the information signal that be sent to the MS 110-112 that lays respectively among the wave beam 501-503 only sends on this wave beam.At this moment, the capacity of sector 500 is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}(\mathrm{\&alpha;}{\log }_2(1+\frac{\mathrm{\&zeta;}}{\mathrm{\&alpha;}}{\mathrm{\&gamma;}}_{1,p})+\mathrm{\&beta;}{\log }_2(1+\frac{\mathrm{\&zeta;}}{\mathrm{\&beta;}}{\mathrm{\&gamma;}}_{2,p})+(1-\mathrm{\&alpha;}-\mathrm{\&beta;}){\log }_2(1+\frac{\mathrm{\&zeta;}}{1-\mathrm{\&alpha;}-\mathrm{\&beta;}}{\mathrm{\&gamma;}}_{2,p}))$

Wherein α is a coefficient of distributing to the Walsh sign indicating number of wave beam 501, and β is a coefficient of distributing to the Walsh sign indicating number of wave beam 502, and the 1-alpha-beta is a coefficient of distributing to the Walsh sign indicating number of wave beam 503.The maximum of sector 500 can obtain capacity and be provided by following formula

Capacity＝N _PDCH?log ₂(1+ζ(γ _1，p+γ _2，p+γ _3，p))，

And this capacity is worked as

$\mathrm{\&alpha;}=\frac{{\mathrm{\&gamma;}}_{1,p}}{{\mathrm{\&gamma;}}_{1,p}+{\mathrm{\&gamma;}}_{2,p}+{\mathrm{\&gamma;}}_{3,p}}$ And $\mathrm{\&beta;}=\frac{{\mathrm{\&gamma;}}_{2,p}}{{\mathrm{\&gamma;}}_{1,p}+{\mathrm{\&gamma;}}_{2,p}+{\mathrm{\&gamma;}}_{3,p}}$

In time, obtain.

Although be described with reference to three wave beam 501-503 in the sector 500 above, those of ordinary skills recognize, above by the concurrent improvement of distributing to the power system capacity that each obtained among a plurality of MS of discrete wave beam can easily being expanded to the wave beam of arbitrary number in the sub-district 500.

In another embodiment of the present invention, shared communication channel can support to surpass two MS or user's code division multiplexing, and operates in the system with CDMA 2000 1X speeches and data.Especially, suppose the code division multiplexing of three MS of shared communication channel support or user 110-112, although those of ordinary skills recognize that this result can easily expand to the MS or the CDM user of arbitrary number.

1X speech and data do not send on shared communication channel, and need some coefficients of the total transmitted power in each wave beam and a coefficient of total bandwidth.Referring again to Fig. 5, make f ₁, f ₂, and f ₃Expression respectively at wave beam 501,502, distribute to the coefficient of the power of CDMA 2000 1X speeches and data (comprise pilot tone, paging, and synchronizing channel expense) in 503.As previous, make N _PDCHThe number of the Walsh sign indicating number of shared communication channel is distributed in expression.Notice that this number does not comprise the Walsh sign indicating number that is used for overhead channel (for example pilot tone, paging, synchronizing channel), and is the Walsh sign indicating number of 1X speech and/or data allocations.

When not having CDM, receive user message signal when only in the sector, dispatching unique user, and this signal sends on whole three wave beams and (perhaps only sends on the user's who is dispatched wave beam, and on other wave beam, send the CDMA noise of equal power) time, the obtainable heap(ed) capacity in this sector is provided by following formula

Capacity＝N _PDCH?log ₂(1+ζmax((1-f ₁)γ _1，p，(1-f ₂)γ _2，p，(1-f ₃)γ _3，p))，

Wherein ζ defines as top.

When CDM is arranged, as shown in Figure 5, discrete MS or the user 110-112 of scheduling in each in can three wave beam 501-503 in sector 500.In addition, the information signal that be sent to each MS110-112 only with wave beam that this MS is associated on send.At this moment, the capacity of sector 500 is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}\left(\begin{array}{c}\mathrm{\&alpha;}{\log }_2(1+\frac{\mathrm{\&zeta;}(1-f_1)}{\mathrm{\&alpha;}}{\mathrm{\&gamma;}}_{1,p})+\mathrm{\&beta;}{\log }_2(1+\frac{\mathrm{\&zeta;}(1-f_2)}{\mathrm{\&beta;}}{\mathrm{\&gamma;}}_{2,p})\\ +(1-\mathrm{\&alpha;}-\mathrm{\&beta;}){\log }_2(1+\frac{\mathrm{\&zeta;}(1-f_2)}{(1-\mathrm{\&alpha;}-\mathrm{\&beta;})}{\mathrm{\&gamma;}}_{2,p})\end{array}\right)$

Wherein, as previous, α is a coefficient of distributing to the Walsh sign indicating number of wave beam 501, and β is a coefficient of distributing to the Walsh sign indicating number of wave beam 502, and the 1-alpha-beta is a coefficient of distributing to the Walsh sign indicating number of wave beam 503.The maximum of sector 500 can obtain capacity and be provided by following formula

Capacity＝N _PDCH?log ₂(1+ζ((1-f ₁)γ _1，p+(1-f ₂)γ _2，p+(1-f ₃)γ _3，p))，

And this capacity is worked as

$\mathrm{\&alpha;}=\frac{(1-f_1){\mathrm{\&gamma;}}_{1,p}}{(1-f_1){\mathrm{\&gamma;}}_{1,p}+(1-f_2){\mathrm{\&gamma;}}_{2,p}+(1-f_3){\mathrm{\&gamma;}}_{3,p}},$ And

$\mathrm{\&beta;}=\frac{(1-f_2){\mathrm{\&gamma;}}_{2,p}}{(1-f_1){\mathrm{\&gamma;}}_{1,p}+(1-f_2){\mathrm{\&gamma;}}_{2,p}+(1-f_3){\mathrm{\&gamma;}}_{3,p}}$

In time, obtain.

Like this, the exchange wave beam provides in the hybrid system with 1X speech and data and shared communication channel and only uses the shared communication channel confers similar advantages.

Referring now to Fig. 6, another embodiment of the present invention has been described, wherein the sector 600 of communication system 100 is divided into K wave beam 601-603, and wherein K is greater than 2.Mark the same.Make γ _{I, p}The MS that is associated with wave beam i of expression or user's (in wave beam, having the user of the highest C/I) C/I, for example MS in the wave beam 601 or user's 110 C/I perhaps by the user of certain other Standard Selection.Make ζ as top, define, make

$\mathrm{\&zeta;}=\frac{P(1-f_o)}{N_{\mathrm{PDCH}}}\frac{1}{f_p}$

Wherein P is a gross power of distributing to the sector, f _pBe the coefficient of distributing to pilot tone (channel) in this power, N _PDCHBe the number of distributing to the Walsh sign indicating number of shared communication channel, and f _oThe power of overhead channel (for example pilot tone, paging and synchronizing channel) is distributed in expression.

Make f _iThe speech distributed at present in the gross power of wave beam i in the wave beam and the coefficient of 1X data are distributed in expression.Suppose transmitted power division equally on K wave beam 601-603 all the time, make that the power of every wave beam is P/K.

When not using CDM, receive user message signal if in the sector, only dispatch unique user, and this signal sends on whole three wave beams and (perhaps only sends on the user's who is dispatched wave beam, and on other wave beam, send the CDMA noise of equal power), the obtainable heap(ed) capacity in this sector is provided by following formula

Capacity＝N _PDCH?log ₂(1+ζmax((1-f ₁)γ _1，p，(1-f ₂)γ _2，p，...，(1-f _K)γ _K，p))

And this heap(ed) capacity is obtained under the following conditions, i.e. our dispatched users i ^*To sharing the use of Packet Data Channel, make product (1-f _i) γ _{I, p}Maximum, and to the wave beam i that is associated ^*In the user distribute all Walsh sign indicating number N _PDCHWith obtainable power (1-f _I*) P/K.

When using 2 user CDM, the obtainable heap(ed) capacity in this sector is provided by following formula

$\mathrm{Capacity}=N_{\mathrm{PDCH}}{\log }_2(1+\mathrm{\&zeta;}((1-f_{i*}){\mathrm{\&gamma;}}_{i*,p}+(1-f_{j*}){\mathrm{\&gamma;}}_{j*,p})),$

I wherein ^*With j ^*Be that two MS or user are (with wave beam i ^*With j ^*Be associated), for example be arranged in the wave beam that is associated 601 of sector 600 and 602 MS 110 and 111, it makes product (1-f _i) γ _{I, p}Maximum, and when distributing to MS (wave beam) i ^*N _PDCHThe factor alpha of Walsh sign indicating number obtains this capacity when being provided by following formula

${\mathrm{\&alpha;}}^{*}=\frac{(1-f_1){\mathrm{\&gamma;}}_{i*,p}}{(1-f_1){\mathrm{\&gamma;}}_{i*,p}+(1-f_2){\mathrm{\&gamma;}}_{j*,p}},$

And distribute to MS (wave beam) j ^*The coefficient of Walsh sign indicating number be (1-α).

(not necessarily MS or user i if MS or user k and 1 are scheduled ^*With j ^*), obtainable heap(ed) capacity is provided by following formula

Capacity＝N _PDCH?log ₂(1+ζ((1-f _k)γ _k，p+(1-f _l)γ _l，p))，

And this capacity only obtains under such condition, i.e. N _PDCHBe assigned to MS k, and residual coefficient (1-α) is assigned to MS 1, wherein α is provided by (following formula)

$\mathrm{\&alpha;}=\frac{(1-f_k){\mathrm{\&gamma;}}_{k,p}}{(1-f_k){\mathrm{\&gamma;}}_{k,p}+(1-f_l){\mathrm{\&gamma;}}_{l,p}}$

In other embodiments of the invention, communication system 100 can be to other use of the beam allocation that does not comprise MS or user, and its current shared communication channel that is assigned to is with optimized system capacity.In such embodiment, the shared communication channel part of distributing to one of neighbours' wave beam of such wave beam can send in this wave beam, and the power of its use equals the obtainable power of Packet Data Channel in this wave beam.In another such embodiment, whole shared control channel promptly, is shared packet data control channel, and (two CDM user's and signal) can send on such wave beam, and the power of its use equals the obtainable power of Packet Data Channel in this wave beam.In another such embodiment, can use untapped Walsh sign indicating number in such wave beam, to send the bit stream of Stochastic Modulation, the power of its use equals the obtainable power of Packet Data Channel in this wave beam.

In another embodiment of the present invention, when communication system 100 for comprising a plurality of control channels, for example during the CDMA 2000 1xEV-DV communication systems of first packet data control channel (PDCCH) and second packet data control channel (PDCCH), the one PDCCH can send to all such wave beams (and only sending these wave beams), and wherein MS is assigned to shared Packet Data Channel (PDCH) at present.The 2nd PDCCH only sends such wave beam thereafter, and its targeted customer is at this 2nd PDCCH.

In another embodiment of the present invention, communication system 100 can send CDMA noise (the untapped Walsh sign indicating number of Stochastic Modulation) on shared communication channel, keeping transmitted power in each wave beam to equate and constant, and keeps the integrality of C/I feedback.The transmission of noise may be desirable, as long as there are not data to send during some time interval on shared communication channel, perhaps have two wave beams to be used for sharing Packet Data Channel, but has four wave beams to be used for 1X speech and data.In this case, only can be two in four wave beams of shared communication channel modulation, two wave beams must be filled with noise in addition.

In another embodiment of the present invention, may want different coefficients (but not the power that equates) to the total transmitted power in beam allocation sector.When average discharge distributed in each wave beam unequally, the method may be useful.Based on same reason, that is, serve traffic demand with inhomogeneous angular distribution, also may want to use the wave beam of different in width.Two kinds of technology are also capable of being combined, that is, the power level of wave beam can be unequal, and the width of wave beam can be unequal.In all scenario, the distribution of the Walsh sign indicating number between the user in the different beams can distribute like this, so that maximize theoretical capacity for similar mode with top.More specifically, the power of every wave beam can be maintained the level of almost fixed, distribute the Walsh sign indicating number of sharing Packet Data Channel simultaneously, so that maximum capacity.Preferably, although the distribute power between the wave beam can be unequal, the power level of wave beam should keep constant, so that do not destroy from the C/I feedback that moves (station).If the power level of wave beam changes, they should not change continually or with low rate, and this is to have destroyed the C/I feedback because change these power levels.

In a word, be the increase capacity, can participate in the MS of concurrent communication session or user's number, different MS or user in each wave beam in a plurality of wave beams that communication system 100 is dispatched with covering domain (particularly sector) is associated.By dispatched users side by side in each wave beam in a plurality of wave beams, prior art relatively, the performance and the throughput of communication system 100 are significantly increased.In one embodiment of the invention, the part of the communication channel of sharing between a plurality of MS in the sector (for example sharing Packet Data Channel) is assigned to each MS that dispatches in wave beam.The part of distributing to the shared communication channel of each MS sends to MS concomitantly via the wave beam that is associated with MS thereafter.In other embodiments of the invention, one or more MS that wherein is positioned at the sector shares described shared communication channel, and other MS that is positioned at the sector does not utilize shared communication channel, can be in the part of shared communication channel that sends to a kind of MS in back transmitted noise.In other embodiments of the invention, voice channel, the data channel that is associated with each MS of dispatching in the wave beam can send to each MS via the wave beam that is associated with MS concomitantly with control channel.In other embodiments of the invention, communication system 100 can distribute total transmitted power of distributing to the sector between a plurality of wave beams that are associated with the sector about equally, perhaps distributes in unequal mode between a plurality of wave beams.By individually being adjusted in the power of the signal that sends in each wave beam, can optimizing the quality of signals of reception, and can minimize the interference that the transmission of the signal in a plurality of wave beams in the same sector causes.

The logical flow chart 700 of Fig. 7 step that to be communication system 100 carry out when transmitting information via exchange beam antenna system each MS in a plurality of MS 110,111.When communication system 100, be preferably scheduler 106, scheduling (702) is arranged in by a plurality of MS of the particular sector of BSS service and (for example is arranged in the MS 110-111 (having shown two) by the sector 151 of BSS 102 services, each wave beam that is used for a plurality of wave beams 160,161 (having shown two) of being associated with this sector) in during different MS, logical flow chart 700 beginnings.For example, the MS 110 among a plurality of MS 110,111 can be dispatched, being used for first wave beam 160, and the 2nd MS 111 among a plurality of MS 110,111 can be dispatched, to be used for second wave beam 161.BSS 102 communicates by letter with each MS among a plurality of MS 110,111 via each air interface 116,117.When each air interface 116,117 comprises shared communication channel, when for example sharing Packet Data Channel, communication system 100, be preferably BSS 102, distribute (704) to give a MS 110 first of shared communication channel, and distribute (706) to give the 2nd MS 111 second portion of shared communication channel.BSS 102, particularly serve the BTS of each MS, and the MS 110 in first wave beam 160 sends the first of (708) shared communication channel thereafter, and the 2nd MS 111 in second wave beam 161 sends the second portion of (710) shared communication channel.

When communication system 100 was cdma communication system, shared communication channel can comprise a plurality of orthogonal codes.In such circumstances, distribute (704) can to comprise first group of orthogonal code division dispensing the one MS 110 in a plurality of orthogonal codes for the step of a MS 110 first of shared communication channel, and distribute (706) can to comprise second group of orthogonal code division dispensing the 2nd MS 111 in a plurality of orthogonal codes for the step of the 2nd MS 111 second portion of shared communication channel.The step that first and second MS 110,111 in each MS wave beam 160,161 separately sends first and second part of (708,710) shared communication channel comprises that respectively the MS 110 in first wave beam 160 sends the step that signal that first group of orthogonal code expand and the 2nd MS 111 in second wave beam 161 send the signal that second group of orthogonal code expand.First group of orthogonal code and second group of orthogonal code can comprise the same part of a plurality of orthogonal codes respectively, perhaps can comprise the different piece of a plurality of orthogonal codes respectively.

In another embodiment of the present invention, communication system 100, promptly each air interface 116,117 between BSS 102 and MS 110 and 111 can further comprise being preferably packet data control channel by control channel.In such embodiments, logic flow 700 can further comprise the step of the 2nd MS 111 transmission (712) control channels in the MS110 in first wave beam 160 and second wave beam 161 respectively by the BTS 104,105 of each MS of service.In another embodiment of the present invention, communication system 100 can further comprise a plurality of control channels, is preferably a plurality of packet data control channels.In such embodiments, by the BTS of each MS of service respectively the step of the 2nd MS 111 transmission (712) control channels in the MS 110 in first wave beam 160 and second wave beam 161 can comprise respectively via each wave beam 160 and 161 and send the step of first control channel in a plurality of packet data control channels to a MS 110 and the 2nd MS.Logic flow 700 can further comprise thereafter by the BTS that serves each MS in first wave beam 160, but not in second wave beam 161, send the step of second control channel in (714) a plurality of control channels.

In another embodiment of the present invention, communication system 100, promptly each air interface 116,117 between BSS 102 and MS 110 and 111 can further comprise a plurality of voice channels and a plurality of data channel.In such embodiments, logic flow 700 can comprise further that the MS 110 of BTS in first wave beam 160 by service MS sends first voice channel in (716) a plurality of voice channels and first data channel in a plurality of data channel, and sends second voice channel in (718) a plurality of voice channels and the step of second data channel in a plurality of data channel by the 2nd MS 111 of BTS in second wave beam 161 of service MS.In another embodiment of the present invention, logic flow 700 can further (comprise) by the BTS of service MS with a plurality of wave beams that sector 151 is associated in the 3rd wave beam in send the 3rd voice channel in (720) a plurality of voice channels and the 3rd data channel in a plurality of data channel, and the step that in the part of the shared communication channel that is associated with the 3rd wave beam, sends (722) noise.

In other embodiments of the invention, the different proportion of distributing to total transmitted power of sector 151 can be distributed to each in a plurality of wave beams 160,161 that are associated with this sector.For example, in one embodiment of the invention, BSS 102 or the BTS that serves each MS can give the same pro rate (724) of distributing to total transmitted power of sector 151 each in a plurality of wave beams 160,161.When the signal extension that in each wave beam, sends used respectively organize orthogonal code and vary in size the time, it is to distribute different transmitted powers to each orthogonal code that each in a plurality of wave beams is distributed the possibility of result of the same ratio of total transmitted power.Yet, needn't be to the same ratio of each beam allocation gross power, and in another embodiment of the present invention, BSS 102 or the BTS that serves each MS can distribute the different proportion of distributing to total transmitted power of sector 151 (726) to give in a plurality of wave beams 160,161 each.

By with a plurality of wave beams that covering domain (particularly sector) is associated in each wave beam in different MS or the users of scheduling, communication system 100 has increased capacity, can participate in the mobile radio station (MS) of concurrent communication session or user's number.Scheduling is arranged in each MS of a plurality of MS of covering domain (being preferably the sector), with the different beams of a plurality of wave beams of being used for being associated with this sector.By side by side dispatching each MS among a plurality of MS in each wave beam in a plurality of wave beams, prior art relatively, the performance and the throughput of communication system are significantly increased.Further, by side by side dispatching each MS among a plurality of MS in each wave beam in a plurality of wave beams, can send shared communication channel, voice channel, data channel and the control channel that is associated with each MS of dispatching in the wave beam concomitantly to a plurality of MS via the wave beam that is associated with each MS.In addition, can individually be adjusted in the power of the signal that sends in each wave beam,, and minimize the interference that the transmission by the signal in a plurality of wave beams in the same sector causes with the quality of signals that optimize to receive.

Although show and describe the present invention, it will be understood by those skilled in the art that and to carry out various modifications and its assembly is carried out equivalence replacement, and do not depart from as the scope of the present invention as illustrated in the appended claims with reference to its specific embodiment.Correspondingly, that specification and accompanying drawing should be regarded as illustrative and nonrestrictive, and all such modifications are all attempted to be included within the scope of the present invention with replacing.

The solution of benefit, other advantage and problem has been described with reference to specific embodiment above.Yet, the solution of benefit, advantage, problem, and anyly cause that any benefit, advantage or solution take place or significant more one or more assemblies that become should not be interpreted as the characteristic conclusive, essential or internal or the assembly of any claim.As used herein such, term " comprises " or its any other distortion is intended to refer to comprising of non-exclusionism, make to comprise that process, method, article or the equipment of a series of assemblies not only comprise the assembly that these are listed, also can comprise do not list especially or be other intrinsic assembly of such process, method, article or equipment.

Claims (22)

1. One kind in comprising the communication system that exchanges beam antenna system, be used among a plurality of wave beams distributing the method for shared communication channel, wherein said shared communication channel comprises a plurality of orthogonal codes, and wherein said method comprises:

   Measure a plurality of propagation channels relevant with each wave beam in a plurality of wave beams;

   The first of described a plurality of orthogonal codes is distributed to first wave beam in described a plurality of wave beam, the second portion of described a plurality of orthogonal codes is distributed to second wave beam in described a plurality of wave beam, and wherein said first and second parts are between base station in first wave beam and the mobile radio station and the function of the measurement quality of base station in second wave beam and the propagation channel between the mobile radio station;

   Send signal that the orthogonal code of the described first of described a plurality of orthogonal codes expands to first mobile radio station by described first wave beam; And

   Send signal that the orthogonal code of the described second portion of described a plurality of orthogonal codes expands to second mobile radio station by described second wave beam.
2. 2. the method for claim 1, wherein:

   Send signal that the orthogonal code of the described first of described a plurality of orthogonal codes expands and comprise that scheduling is used for described first mobile radio station of described first wave beam and sends signal that the orthogonal code of the described first of described a plurality of orthogonal codes expands to described first mobile radio station by described first wave beam;

   Send signal that the orthogonal code of the described second portion of described a plurality of orthogonal codes expands and comprise that scheduling is used for described second mobile radio station of described second wave beam and sends signal that the orthogonal code of the described second portion of described a plurality of orthogonal codes expands to described second mobile radio station by described second wave beam;

   Wherein, described first and second parts of described a plurality of orthogonal codes are based on the measurement quality of the propagation channel between the base station in first wave beam and first mobile radio station and the described quality of the propagation channel between the base station in second wave beam and second mobile radio station.
3. 3. method as claimed in claim 2, wherein, described communication system further comprises control channel, and wherein, described method further comprises step: send described control channel in each in described first wave beam and described second wave beam.
4. 4. method as claimed in claim 3, wherein, described control channel comprises first control channel, wherein, described communication system further comprises second control channel, and it is associated with described first mobile radio station, and is not associated with described second mobile radio station, and wherein, described method further comprises step: in described first wave beam but send described second control channel in described second wave beam.
5. 5. method as claimed in claim 2, wherein, described communication system further comprises a plurality of voice channels and a plurality of data channel, and wherein, described method further may further comprise the steps:

   First voice channel in described first wave beam in the described a plurality of voice channels of transmission and first data channel in described a plurality of data channel; With

   Second voice channel in described second wave beam in the described a plurality of voice channels of transmission and second data channel in described a plurality of data channel.
6. 6. the method for claim 1, wherein described communication system is divided into a plurality of geographic sector area, and wherein, each wave beam in described a plurality of wave beams sends in the same sector in described a plurality of sectors.
7. 7. the method for claim 1 further comprises:

   Send user profile by described shared communication channel and described first wave beam; And

   In the transmission of user profile, if in described second wave beam, there is not requirement for described shared channel for given time slot, in second wave beam, send with shared communication channel identical in first wave beam and transmit.
8. 8. the method for claim 1 further comprises:

   Send user profile by described shared communication channel and described first wave beam; And

   In the transmission of user profile, if in described second wave beam, there is not requirement for described shared channel for given time slot, in second wave beam, use the orthogonal code transmitted noise of the untapped shared communication channel of first wave beam.
9. 9. method as claimed in claim 8 further comprises and keeps the transmitted power that is associated with first wave beam, is approximately equal to the transmitted power that is associated with second wave beam.
10. 10. the method for claim 1 further comprises and keeps the transmitted power that is associated with first wave beam, is approximately equal to the transmitted power that is associated with second wave beam.
11. 11. method as claimed in claim 2 further comprises

    In first wave beam,, keep the transmitted power of approximately constant for shared communication channel; And

    In second wave beam,, keep the transmitted power of approximately constant for shared communication channel.
12. 12. in the communication system that comprises the exchange beam antenna system that generates a plurality of predetermined, fixing wave beams, a kind of base station sub-system, it comprises:

    Aerial array, it comprises a plurality of array components;

    Processor, it comprises orthogonal code generator, be used to generate a plurality of orthogonal codes, wherein said a plurality of orthogonal code is assigned to shared communication channel, first wave beam of wherein said processor and a plurality of fixed beams distributes the first of described a plurality of orthogonal codes explicitly, distribute the second portion of described a plurality of orthogonal codes explicitly with second wave beam of a plurality of fixed beams, wherein said processor is based on the propagation channel mass measurement that is associated with described first wave beam and the propagation channel mass measurement that is associated with described second wave beam and distribute described a plurality of orthogonal code explicitly with first and second wave beams, and the signal that the orthogonal code of the first of wherein said a plurality of orthogonal codes is expanded sends the signal of expanding with the orthogonal code of the second portion of described a plurality of orthogonal codes by one or more first aerial arrays and sends by one or more second array components.
13. 13. base station sub-system as claimed in claim 12, it further comprises scheduler, and it distributes described first wave beam to first mobile radio station, and distributes described second wave beam to second mobile radio station.
14. 14. base station sub-system as claimed in claim 12, wherein, described base station sub-system further transmits control channel in each in described first wave beam and described second wave beam.
15. 15. base station sub-system as claimed in claim 14, wherein, described control channel is first control channel, and wherein, described base station sub-system further at described first wave beam but sends second control channel in described second wave beam, wherein second control channel is different from first control channel.
16. 16. base station sub-system as claimed in claim 12, wherein, described base station sub-system further sends first voice channel, data channel and corresponding to the signal that first expanded of the described orthogonal code of described shared communication channel in described first wave beam, and the signal that sends second voice channel and expand corresponding to the second portion of the described orthogonal code of described shared communication channel in described second wave beam.
17. 17. base station sub-system as claimed in claim 12, wherein, described base station sub-system operates in the communication system that is divided into a plurality of geographic sector area, and wherein, each wave beam in described a plurality of wave beams sends in the same sector in described a plurality of sectors.
18. 18. base station sub-system as claimed in claim 12, wherein said base station sub-system further comprises a plurality of weighter, wherein, each weighter in described a plurality of weighter is connected to described processor and further is connected to a array component in described a plurality of array component, and, wherein said processor will be organized weight coefficient more and send described weighter to, first group of weight coefficient in wherein said many group weight coefficients is used for sending by first array component by described weighter, and second group of weight coefficient in wherein said many group weight coefficients is used for sending by second array component by described weighter.
19. 19. base station sub-system as claimed in claim 12, wherein said base station sub-system sends user profile by described shared communication channel and described first wave beam, and, in the transmission of user profile, if in described second wave beam, there is not requirement for given time slot, in second wave beam, sends with shared communication channel identical in first wave beam and transmit for described shared channel.
20. 20. base station sub-system as claimed in claim 12, wherein said base station sub-system sends user profile by described shared communication channel and described first wave beam, and, in the transmission of user profile, if in described second wave beam, there is not requirement for given time slot, in second wave beam, uses the orthogonal code transmitted noise of the untapped shared communication channel of first wave beam for described shared channel.
21. 21. base station sub-system as claimed in claim 12, wherein said base station sub-system is kept the transmitted power that is associated with first wave beam, is approximately equal to the transmitted power that is associated with second wave beam.
22. 22. base station sub-system as claimed in claim 13, wherein said base station sub-system is in first wave beam, for shared communication channel, keep the transmitted power of approximately constant, and, in second wave beam, for shared communication channel, keep the transmitted power of approximately constant.

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