CN101374005A - Method for transmitting down user data and distributed antennae mobile communication system - Google Patents

Abstract

The invention discloses a method for transmitting downlink user data, which is used in a distributed antenna mobile communication system. The method comprises the steps of collecting all antenna signals; determining corresponding effective antennae carrying effective information of users; and allocating the downlink data of the users to the determined corresponding effective antennae and transmitting to the users. The method provided in the embodiment of the invention can effectively reduce interference among user data when transmitting downlink user data, and increase the antenna power allocated to the users from the down link.

Description

A kind of method for transmitting down user data and distributed antenna mobile communication system

Technical field

The present invention relates to moving communicating field, relate in particular to a kind of method for transmitting down user data and corresponding distributed antenna mobile communication system.

Background technology

In recent ten years, the mobile communication development moves on available radio spectrum resources is continuous rapidly, and the decay of wireless signal is more serious, and radius of society constantly dwindles.Constantly dwindling of radius of society means that base station density increases the cost up of networking.Simultaneously, frequent handover causes the air resource waste, and therefore spectrum efficiency also reduces.

Traditional antenna system is placed a plurality of antennas at the base station end, also places a plurality of antennas at travelling carriage, forms communication link between base station and the travelling carriage, and the base station communicates by the travelling carriage with a plurality of antennas in aerial array and the sub-district.From the angle of system configuration, such system singly goes into singly to go out cellular communication system and compares and do not have basic difference with traditional.Though traditional antenna system can overcome the channel path loss that large scale declines and shadow fading causes, can form good system in the sub-district covers, solve the communication dead angle in the sub-district, improve telecommunication service quality, but since in traditional antenna system the distance between a plurality of antennas of base station and wavelength difference apart from little, therefore has correlation between each antenna, therefore can arrive that (Arrival of An-gle, AOA) the measurement and positioning mode is obtained the accurate angle of each antenna according to angle.

In distributed antenna mobile communication system, have a plurality of at a distance of much larger than carrier wavelength, only the wireless signal processing unit of simple functions such as power amplifier, LAN frequency conversion and Signal Pretreatment arranged in each cell range, each wireless signal processing unit comprises one or more antenna, these wireless signal processing units only need be finished the sending and receiving function of signal and the simple preliminary treatment of signal, and be connected with core processing unit by optical fiber, coaxial cable or microwave wireless channel, finish signal processing function at core processing unit.Such system configuration has not only possessed the advantage of traditional antenna system, has reduced path loss, has overcome shadow effect, has also significantly improved channel capacity by the MIMO technology simultaneously.Compare with traditional antenna system, distance in the distributed antenna mobile communication system between the wireless signal processing unit is greater than carrier wavelength, therefore the channel fading that forms between different base station antenna and the travelling carriage can be regarded as uncorrelatedly fully, and channel capacity is bigger.

But, because it is uncorrelated between each antenna for base station in the distributed antenna mobile communication system, therefore the communication environment that faces of distributed antenna mobile communication system is different from the communication environment under traditional antenna system, wave beam forming in traditional antenna system and AOA measurement and positioning mode no longer are applicable to distributed antenna mobile communication system, in addition, (DynamicalChannel Allocation, DCA) method also no longer is applicable to distributed antenna mobile communication system to dynamic channel allocation under traditional antenna system.

In the existing distributed antenna mobile communication system, be on all wireless signal processing units, to launch identical down link signal simultaneously generally speaking by each sub-district, in addition, uplink signal is received and is sent to core processing unit by wireless signal processing units all in the sub-district, as seen, in the existing distributed antenna mobile communication system, the up reception of data flow is handled almost constant, and in the multiaerial system, certain user's effective information generally just is carried on a few antennas, if therefore do not carry this user's effective information on certain transmit antennas, then the data on this antenna that receiving terminal receives are noises with respect to this user profile.At present also do not have special effective method for the distribution method of data flow on a plurality of aerial arrays, the method for transmitting down user data in the existing distributed antenna mobile communication system is an important directions of wireless communication technology personnel research always.

Summary of the invention

The invention provides a kind of method for transmitting down user data, can effectively reduce the descending interference in the distributed antenna mobile communication system.

The invention provides a kind of method for transmitting down user data, be applied to distributed antenna mobile communication system, this method comprises:

Collect whole aerial signals;

Determine the corresponding effectively antenna of each user's effective information of carrying according to aerial signal;

User's downlink data is assigned to determine corresponding effectively sends to the user on the antenna.

In the method provided by the invention, the whole aerial signals of described collection also comprise: the whole aerial signals that will collect are transformed into the baseband signal of each user on each antenna; The described corresponding effectively antenna of determining each user's effective information of carrying according to aerial signal also comprises: the corresponding effectively antenna of determining each user's effective information of carrying according to the baseband signal of described each user on each antenna.

Describedly determine the corresponding effectively antenna of each user's effective information of carrying according to aerial signal, comprising: the aerial signal according to each user calculates the channel impulse response of each user on each antenna; Calculate the power of each user on each antenna according to described each user respectively at the channel impulse response on each antenna; Determine effective antenna of each user's correspondence according to the power of described each user on each antenna.

Describedly determine to comprise effective antenna of each user's correspondence according to the power of each user on each antenna: with the power of each user on each antenna greater than the antenna of setting threshold effective antenna as this user's correspondence; Perhaps, calculate the power threshold of each user on antenna respectively according to the power of each user on each antenna, for each user, with the power of this user on antenna greater than the antenna of corresponding power threshold effective antenna as this user's correspondence.

Said method of the present invention also comprises: effective aerial information of each user is reported to radio network controller (RNC); Described RNC determines each user's network site according to effective aerial information of each user, and carries out dynamic channel allocation for the user.

Described effective aerial information with each user reports to RNC, specifically comprises: the measurement that utilizes angle to arrive measurement and positioning reports an effective aerial information with each user to report to RNC; Perhaps, generate measurement according to pre-defined rule and report item, report effective aerial information of each user to RNC.

Described RNC determines each user's network site according to effective aerial information of each user, and comprising: described RNC parses effective aerial information of each user of reception according to described pre-defined rule, determines effective antenna of each user's correspondence; And determine each user's network site according to the aerial position of preserving.

Described for the user carries out dynamic channel allocation, comprising: RNC is according to each user's network site, for the user who is positioned at same antenna overlay area distributes different time slots, carrier wave or code channel.

Method provided by the invention also comprises: the carrier power of each antenna is reported to described RNC;

Described RNC surpasses the carrier wave or the time slot of setting threshold for the user distributes carrier power on its effective antenna.

The present invention also provides a kind of distributed antenna mobile communication system, comprising: wireless signal processing unit and core processing unit; Wherein:

The wireless signal processing unit is used for the transmitting antenna signal;

Core processing unit is used for determining according to each aerial signal that described wireless signal processing unit sends effective antenna of each user's correspondence; When sending down user data, be assigned to respectively on effective antenna corresponding and send with each user with sending to each user's data.

In the system provided by the invention, described wireless signal processing unit is more than one.

Described core processing unit also comprises:

The channel impulse response computation subunit is used for calculating the channel impulse response of each user on each antenna according to each aerial signal that described wireless signal processing unit sends;

The power calculation subelement is used for calculating the power of each user on each antenna according to described each user respectively at the channel impulse response on each antenna;

Effectively antenna is judged subelement, is used for determining effective antenna of each user's correspondence;

Down user data sends subelement, is used for downlink data with each user and is assigned on effective antenna corresponding with each user and sends.

Described core processing unit comprises that also the effective aerial information of user reports subelement, and described system also comprises the dynamic channel allocation unit; Wherein:

The effective aerial information of user reports subelement, is used to obtain described effective antenna and judges the effective aerial information corresponding with the user that subelement is determined and report described dynamic channel allocation unit;

The dynamic channel allocation unit is used for reporting effective aerial information of each user that subelement reports to determine each user's network site according to the effective aerial information of described user, and carries out dynamic channel allocation according to each user network position for the user.

Described dynamic channel allocation unit is arranged in the radio network controller of network side.

The present invention is by collecting whole aerial signals; Determine the corresponding effectively antenna of each user's effective information of carrying according to described aerial signal; User's downlink data is assigned to determine corresponding effectively sends to the user on the antenna, therefore brought following beneficial effect:

1, effectively reduced the descending interference of system;

The antenna power that the user is assigned to when 2, effectively having improved descending the transmission;

3, increased the channel capacity of distributed antenna mobile communication system, reduced system power dissipation, made distributed antenna mobile communication system have better expansibility and flexibility;

4, the effective antenna of the user who determines can be reported to RNC, RNC also can further determine customer location according to the effective aerial information of each user that reports then, helps the network side positioning service; In addition, RNC can also carry out dynamic channel allocation according to customer location, has further optimized the resource distribution of this system, has improved channel capacity.

Description of drawings

Fig. 1 provides one of a kind of method for transmitting down user data flow chart for the embodiment of the invention;

Fig. 2 provides two of a kind of method for transmitting down user data flow chart for the embodiment of the invention;

One of a kind of distributed antenna mobile communication system structural formula intention that Fig. 3 provides for the embodiment of the invention;

Two of a kind of distributed antenna mobile communication system structural representation that Fig. 4 provides for the embodiment of the invention;

Three of a kind of distributed antenna mobile communication system structural representation that Fig. 5 provides for the embodiment of the invention.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.

Figure 1 shows that the embodiment of the invention provides one of a kind of method for transmitting down user data flow chart, this method may further comprise the steps:

S101: collect whole aerial signals;

S102: the corresponding effectively antenna of determining each user's effective information of carrying according to described aerial signal;

S103: user's downlink data is assigned to determine corresponding effectively sends to the user on the antenna.

To can realize such scheme after wireless signal processing unit in the existing distributed antenna mobile communcations system and the expansion of core processing unit process function: above-mentioned antenna is the reception antenna that places the wireless signal processing unit, and core processing unit can be used for performing step S102 and the described function of step S103.Below be elaborated with the embodiment of wireless signal processing unit and the core processing unit method for transmitting down user data that to be example provide the embodiment of the invention.In addition, for explaining conveniently, the reception antenna in all wireless signal processing units is referred to as antenna.

Figure 2 shows that a kind of method for transmitting down user data that the embodiment of the invention provides flow chart two, this method comprises:

S201: the wireless signal processing unit receive each user on each antenna signal and send to core processing unit.

In addition, the wireless signal processing unit also can further earlier be transformed into each user with each user respectively at the signal on each antenna and send to core processing unit again after the baseband signal on each antenna.

S202: each user that core processing unit provides a plurality of wireless signal processing units is at the channel impulse response of each user of the calculated signals on each antenna on every antenna.

Wherein, channel impulse response h is obtained by following formula:

$h=\mathrm{IFFT}\left(\frac{\mathrm{FFT}(\mathrm{midamble}\_\mathrm{data}(1:128))}{\mathrm{FFT}(\mathrm{midamble}\_\mathrm{code}(1:28))}\right)........................\left(1\right)$

In the formula (1), midamble_data (1:128) receives back 128 points of the 144 chip midamble part in the data for certain antenna; Midamble_code (1:128) be the midamble code word of transmitting terminal user after according to the displacement of transmitting terminal (the midamble code word that transmitting terminal sends by RNC according to certain rule configuration, and notice sends and receiving terminal).

H is a channel impulse response, and the window length of general h gets 16, promptly gets the value of preceding 16 points of IFFT result as h.

In addition, if the wireless signal processing unit upload for the baseband signal of each user on each antenna, then core processing unit can calculate the channel impulse response of each user on every antenna according to the baseband signal that receives.

S203: calculate the power of each user on each antenna respectively at the channel impulse response on each antenna according to each user.

For example, the number of antennas of establishing the base station is N altogether, and the corresponding sequence of the channel impulse response h of certain user on i root antenna that calculates among the S102 is: { h₀, h₁..., h_M, then the power of this user on this antenna is:

$p_i={\left|\right|h\left|\right|}^2=\underset{j=0}{\overset{M}{\mathrm{\Σ}}}{\left|h_j\right|}^2........................\left(1\right)$

In the formula (1), the span of i is 1 to M.

S204: for each user, the relatively power of this user on every antenna and the size of setting threshold, with power greater than the antenna of setting threshold effective antenna as this user's correspondence;

Perhaps, for each user, according to the power threshold of this user of the power calculation of this user on each antenna on antenna, for every antenna, if the power of this user on this antenna is greater than the threshold value that calculates, then with the effective antenna of this antenna as this user's correspondence.

Wherein, the computation rule of certain the power threshold P ' of user A on antenna is:

The power maximum * β of P '=user A on all antennas

Wherein, β is a coefficient that value can be set as required.For example: establish the base station and have 3 antennas, calculate the power of certain user A on 3 antennas among the step S203 and be respectively: P₁, P₂, P₃, P wherein₂P₁P₃, then the power threshold of this user on all antennas is: P '=P₂* β.

S205: in down link, core processing unit will send to each user's data and be assigned to respectively on effective antenna of each user's correspondence.

Interference when further reducing to send downlink data between each user data, the core processing unit of base station is when each descending transmission, and effective antenna of each user's correspondence of determining among the S104 in the time of can be according to up the transmission is determined the distribution method of down user data on each antenna.Embodiment is: for certain user's data of giving to be sent, core processing unit is according to effective antenna of this user's correspondence of determining in the up link, send on the effective antenna that will be assigned to this user's correspondence to be sently for this user's data, promptly non-effective antenna of this user's correspondence is not participated in the distribution to be sent to this user's data.Like this, can improve the transmitted power of effective antenna, in addition, because to non-effective antenna assignment of this user's correspondence this user's data of giving to be sent, therefore be equivalent to reduce on non-effective antenna of this user's correspondence this user data to all the other users' interference.

Best, behind the above-mentioned steps S204, also can be further in up link, effective aerial information of each user be reported to radio network controller (Radio Network Controller, RNC); RNC can determine each user's position according to effective aerial information of each user then, and determines the dynamic channel allocation mode of this distributed antenna mobile communication system.Concrete implementation step comprises:

1, this subscriber channel impulse response on non-effective antenna of each user's correspondence is put 0, and all users are carried out joint-detection.

This step can further reduce the noise in the up link.

2, core processing unit utilizes existing AOA measurement to report an effective aerial information with each user to report to RNC, perhaps, measures an effective aerial information that reports item to come report of user according to the rule generation that preestablishes between core processing unit and the RNC.

Because existing AOA mensuration no longer is applicable to distributed antenna mobile communication system, so the core processing unit of base station no longer utilizes the AOA mensuration to measure customer location, can utilize the measurement of AOA to report the effective aerial information that reports each user to RNC.A content that reports no longer is the user's that reports of traditional AOA measurement a angular position information, but effective aerial information of each user.

The effective aerial information of each user reports after can encoding by the coding rule of making an appointment between core processing unit and the RNC.For example:, be: use 16 ary codes recording user effective informations as the coding rule of making an appointment between core processing unit and the RNC for certain user; Wherein, stipulate effective antenna of corresponding this user of each code: code is the effective antenna of the antenna of 1 this code correspondence of expression for this user, otherwise code is the non-effective antenna of the antenna of 0 this code correspondence of expression for this user; Suppose that the base station has 6 antennas, then can report the combinational code of significant bit information of each antenna of each user's correspondence to RNC is 0x100001, effective antenna of representing this user's correspondence is antenna 1 and antenna 6, it is the base band data that has carried this user on antenna 1 and the antenna 6, wherein, 0x represents that the code that reports is 16 ary codes.

Optionally, core processing unit also reports the carrier power of each antenna to RNC.

3, RNC determines each user's position and determines the DCA mode according to effective aerial information of each user who receives.

Wherein, because network side has been planned and has been kept in the distributed intelligence of each antenna in the network planning, therefore RNC can be according to effective antenna number of each user's correspondence in effective aerial information of definite each user who receives of predetermined in advance coding rule, and then each antenna number preserved in advance according to network side and the corresponding relation of aerial position, determine user's particular location and determine user in the every antenna coverage areas.For example: effective aerial information of certain user that RNC receives is 0x100001, then can to determine effective antenna of this user be antenna 1 and antenna 6 to RNC, therefore, RNC can determine the overlapping place that this user is positioned at the overlay area of the overlay area of antenna 1 and antenna 6 according to the antenna distributed intelligence of network side preservation.

RNC determines the DCA strategy:

For the user who is positioned under the same antenna overlay area, can be in up link because asynchronous or multipath etc. produce multi-user interference; Same, in down link sends because the power of single antenna is limited, during therefore descending the transmission for corresponding to same effective antenna and be in a plurality of users of the same antenna under covering, the power of this effective antenna need send to a plurality of users, and power sends and is restricted.Therefore, when RNC carries out dynamic channel allocation to the user, can will be assigned to different carrier waves, time slot and code channel corresponding to same effective antenna and the user data that is positioned at same antenna covering area, to reduce the interference between these users in the communication process, avoid a plurality of users of the same antenna under covering to fight for the power of single antenna simultaneously.

In addition, if RNC receives the carrier power of each antenna that core processing unit reports, then RNC at first judges according to the antenna carrier power threshold of setting whether each carrier wave of every antenna transships, if certain carrier power of certain root antenna surpasses the antenna carrier power threshold of setting, then determine these carrier wave overloads, RNC as far as possible distributes carrier power on its effective antenna above the carrier wave or the time slot of setting threshold for the user when the user is carried out dynamic channel allocation.

As seen, effective aerial information of each user's correspondence that RNC reports according to core processing unit can be determined each user's position, thereby realizes dynamic assignment user's resources such as carrier wave, time slot and code channel.

Optionally, RNC can realize user's Memorability location and the DCA mode of fixing this distributed antenna mobile communication system according to effective aerial information of each user who receives.Be that RNC can store each customer location of determining, and fix the DCA mode of this distributed antenna mobile communication system.In addition, because user's position may be moved over time, therefore the core processing unit of base station can be as required regularly to effective aerial information of RNC report of user, RNC is after receiving the effective aerial information of each user, whether the effective aerial information of each user that can judge this reception earlier is consistent with the effective aerial information of each user of last time reception, if it is consistent, then RNC still uses the last channel that each user is distributed to communicate, otherwise, each user is carried out dynamic channel allocation again according to the effective aerial information of each user of this reception.

Method for transmitting down user data in the distributed antenna mobile communication system that provides by the embodiment of the invention can reduce the interference between the different user; Can also avoid a plurality of users under the same antenna covering to fight for single-antenna power, improve the user power of each antenna transmission, reduce the interference of a plurality of users on the same antenna in the descending transmission.Greatly improved the capacity of wireless communication system.

Method for transmitting down user data in a kind of distributed antenna mobile communication system that provides corresponding to the embodiment of the invention, the embodiment of the invention also provides a kind of distributed antenna mobile communication system, as shown in Figure 3, comprising: wirelesssignal processing unit 31 andcore processing unit 32, wherein:

Wirelesssignal processing unit 31, each aerial signal that is used for receiving sends tocore processing unit 32.

Core processing unit 32, each aerial signal that is used for providing according to the wireless signal processing unit is determined effective antenna of each user's correspondence; When sending down user data, be assigned to respectively on effective antenna corresponding and send with each user with sending to each user's data.

Preferably, the distributed antenna mobile communication system that provides of the embodiment of the invention has a plurality of wirelesssignal processing units 31.

Preferably, wirelesssignal processing unit 31 can be further with the aerial signal that receives be transformed to each user on each antenna baseband signal and send tocore processing unit 32,core processing unit 32 is determined effective antenna of each user's correspondence according to the baseband signal of each user on each antenna.

Figure 4 shows that a kind of distributed antenna mobile communication system structural representation two that the embodiment of the invention provides, wherein, whereincore processing unit 32 can also comprise:

Channel impulseresponse computation subunit 41,power calculation subelement 42, effective antenna judge that subelement 43, down user data sendsubelement 44.

Channel impulseresponse computation subunit 41 is used for calculating the channel impulse response of each user on each antenna according to the aerial signal that the wireless signal processing unit provides.

Power calculation subelement 42 is used for calculating the power of each user on each antenna according to each user respectively at the channel impulse response on each antenna.

Effectively antenna is judgedsubelement 43, is used for determining the effective antenna corresponding with the user.

Concrete grammar comprises: whether judge the power of each user on each antenna greater than preset threshold, with power greater than the antenna of setting threshold effective antenna as the respective user correspondence; Perhaps, rated output threshold value, and whether judge the power of each user on each antenna greater than the power threshold that calculates, with power greater than the antenna of power threshold effective antenna as the respective user correspondence.

Down user data sendssubelement 44, is used for downlink data with each user and is assigned on effective antenna corresponding with each user and sends.

As shown in Figure 5, thecore processing unit 32 in the distributed antenna mobile communication system that the embodiment of the invention provides comprises that also the effective aerial information of user reports subelement 51, and described distributed antenna mobile communication system also comprises dynamicchannel allocation unit 52; Wherein:

The effective aerial information of user reports subelement 51, is used to obtain effective antenna and judges effective aerial information of each user's correspondence thatsubelement 43 is determined and report dynamicchannel allocation unit 52;

Dynamicchannel allocation unit 52 is used for reporting effective aerial information of each user that subelement 51 reports to determine each user's network site according to the effective aerial information of user, and carries out dynamic channel allocation according to each user's network site for the user.

Preferably, dynamicchannel allocation unit 52 is arranged in the radio network controller of network side.

Method for transmitting down user data in the distributed antenna mobile communication system that the embodiment of the invention provides by determining the effective antenna corresponding with each user, is assigned to each user's downlink data on effective antenna corresponding with this user and sends; Can also will adjust to different time slots or carrier wave corresponding to same effective antenna and the user that is positioned at same antenna covering area, thereby the transmitted power of effective antenna of each user's correspondence of realization raising also reduces the interference of each user on antenna, improve system communication quality, make system have greater flexibility and autgmentability.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (14)

1. a method for transmitting down user data is applied to distributed antenna mobile communication system, it is characterized in that, this method comprises:

Collect whole aerial signals;

Determine the corresponding effectively antenna of each user's effective information of carrying according to aerial signal;

User's downlink data is assigned to determine corresponding effectively sends to the user on the antenna.

2. the method for claim 1 is characterized in that, the whole aerial signals of described collection also comprise: the whole aerial signals that will collect are transformed into the baseband signal of each user on each antenna;

The described corresponding effectively antenna of determining each user's effective information of carrying according to aerial signal also comprises: the corresponding effectively antenna of determining each user's effective information of carrying according to the baseband signal of described each user on each antenna.

3. the method for claim 1 is characterized in that, describedly determines the corresponding effectively antenna of each user's effective information of carrying according to aerial signal, comprising:

Aerial signal according to each user calculates the channel impulse response of each user on each antenna;

Calculate the power of each user on each antenna according to described each user respectively at the channel impulse response on each antenna;

Determine effective antenna of each user's correspondence according to the power of described each user on each antenna.

4. method as claimed in claim 3 is characterized in that, describedly determines to comprise effective antenna of each user's correspondence according to the power of each user on each antenna:

With the power of each user on each antenna greater than the antenna of setting threshold effective antenna as this user's correspondence; Perhaps

Calculate the power threshold of each user on antenna respectively according to the power of each user on each antenna, for each user, with the power of this user on antenna greater than the antenna of corresponding power threshold effective antenna as this user's correspondence.

5. method as claimed in claim 4 is characterized in that, also comprises: effective aerial information of each user is reported to radio network controller (RNC);

Described RNC determines each user's network site according to effective aerial information of each user, and carries out dynamic channel allocation for the user.

6. method as claimed in claim 5 is characterized in that, described effective aerial information with each user reports to RNC, specifically comprises:

The measurement that utilizes angle to arrive measurement and positioning reports an effective aerial information with each user to report to RNC; Perhaps

Generate measurement according to pre-defined rule and report item, report effective aerial information of each user to RNC.

7. method as claimed in claim 5 is characterized in that, described RNC determines each user's network site to comprise according to effective aerial information of each user:

Described RNC parses effective aerial information of each user of reception according to described pre-defined rule, determine effective antenna of each user's correspondence; And determine each user's network site according to the aerial position of preserving.

8. method as claimed in claim 7 is characterized in that, and is described for the user carries out dynamic channel allocation, comprising:

RNC is according to each user's network site, for the user who is positioned at same antenna overlay area distributes different time slots, carrier wave or code channel.

9. method as claimed in claim 8 is characterized in that, also comprises:

The carrier power of each antenna is reported to described RNC;

Described RNC surpasses the carrier wave or the time slot of setting threshold for the user distributes carrier power on its effective antenna.

10. a distributed antenna mobile communication system is characterized in that, comprising: wireless signal processing unit and core processing unit; Wherein:

The wireless signal processing unit is used for the transmitting antenna signal;

Core processing unit is used for determining according to each aerial signal that described wireless signal processing unit sends effective antenna of each user's correspondence; When sending down user data, be assigned to respectively on effective antenna corresponding and send with each user with sending to each user's data.

11. system as claimed in claim 10 is characterized in that, described wireless signal processing unit is more than one.

12., it is characterized in that described core processing unit comprises as claim 10 or 11 described systems:

The channel impulse response computation subunit is used for calculating the channel impulse response of each user on each antenna according to each aerial signal that described wireless signal processing unit sends;

The power calculation subelement is used for calculating the power of each user on each antenna according to described each user respectively at the channel impulse response on each antenna;

Effectively antenna is judged subelement, is used for determining effective antenna of each user's correspondence;

Down user data sends subelement, is used for downlink data with each user and is assigned on effective antenna corresponding with each user and sends.

13. system as claimed in claim 12 is characterized in that, described core processing unit comprises that also the effective aerial information of user reports subelement, and described system also comprises the dynamic channel allocation unit; Wherein:

The effective aerial information of user reports subelement, is used to obtain described effective antenna and judges the effective aerial information corresponding with the user that subelement is determined and report described dynamic channel allocation unit;

The dynamic channel allocation unit is used for reporting effective aerial information of each user that subelement reports to determine each user's network site according to the effective aerial information of described user, and carries out dynamic channel allocation according to each user network position for the user.

14. system as claimed in claim 13 is characterized in that, described dynamic channel allocation unit is arranged in the radio network controller of network side.

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