CN102724682A - Networking method and device of communication system based on active antenna - Google Patents
Networking method and device of communication system based on active antenna Download PDFInfo
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Abstract
The invention discloses a networking method and device of a communication system based on an active antenna, wherein the method comprises the steps of setting up the active antenna to generate multiple wave beams and covering the same cell with the said multiple wave beams. By adopting the networking method and device disclosed by the invention, the problems of interference and switching in the application of the active antenna can be solved, additional switching and expenses can be avoided, and meanwhile fine covering can be realized to increase the system capacity.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of networking communication system method and device based on active antenna.
Background technology
Along with the rapid growth of portable terminal and data service, following cordless communication network for the aspects such as continuous covering in message transmission rate, power system capacity and area require increasingly high.System compares with the traditional base station, and active antenna adopts multichannel radio frequency and antenna a period of time to cooperate radio frequency part and the synthetic integral body of antenna sets of traditional base station, and the implementation space beam forming is accomplished the transmitting-receiving of radiofrequency signal.From wireless communication system application, active antenna has very flexible spatial wave beam control ability, can adjust spatial beams shape and ability flexibly to different application scenes, and networking has significant advantage to these characteristics for wireless communication system.In the practical application of active antenna; Usually adopt horizontal sectorization or vertical sector characteristic to improve power system capacity; Promptly produce the wave beam on N (N >=2) individual level or the vertical direction through active antenna, an original sector is split into N sector, system spectral resources is equivalent to original N doubly; Under the prerequisite that does not increase equipment such as website or antenna, for the effective elevator system capacity of some special scenes.
Yet under horizontal sectorization, the vertical sector application scenarios, the multi-beam that produces through active antenna is that the method for corresponding a plurality of sub-districts has also been brought a series of problem with the space cutting.At first the adjustable space of spatial beams on level or vertical direction is limited, and particularly vertical direction is generally spent less than 20, and the isolation between wave beam can't be accomplished fine, exists stronger same frequency at the wave beam crossover region and disturbs; Especially, for the city complex scene, owing to exist abundant multipath effect, the isolation between wave beam is difficult to distinguish more, can produce more more complicated wave beam crossover regions.If the interference of wave beam crossover region is strong excessively, the lifting on the power system capacity of being brought by the sector number increase will weaken greatly; On the other hand; For the relatively more responsive system of the interference problem between the neighbor cell control channel; Not only can't strengthen the antijamming capability of control channel under horizontal sectorization, the vertical sector application scenarios, and because the increase of sector number and crossover region can bring more more complicated interference problems; Restrict the data transmission rate of data channel, further compressed the gain of power system capacity; At last, sector number and crossover region have also brought more complicated switchover policy when increasing, increased system complexity, have equally also influenced the lifting of systematic function.
Interference and switching problem to occurring in the active antenna application in the correlation technique do not propose effective solution at present as yet.
Summary of the invention
Interference and switching problem to occurring in the active antenna application in the correlation technique the invention provides a kind of networking communication system method and device based on active antenna, to address the above problem at least.
According to an aspect of the present invention, a kind of networking communication system method based on active antenna is provided, has comprised: be provided with source antenna and produce a plurality of wave beams; Said a plurality of wave beams are covered same sub-district.
Preferably, said a plurality of wave beams being covered same sub-district comprises: select at least one wave beam and the user in the said sub-district in said a plurality of wave beam to carry out the signal transmission.
Preferably, selecting at least one wave beam and the user in the said sub-district in said a plurality of wave beam to carry out the signal transmission comprises: select at least one wave beam in said a plurality of wave beam to said user's transmitting down link signal.
Preferably; Select at least one wave beam in said a plurality of wave beam to comprise:, to select at least one wave beam in said a plurality of wave beam to said user's transmitting down link signal according to the upward signal metrical information that the downstream signal metrical information of said reporting of user and/or base station are detected to said user's transmitting down link signal.
Preferably, the upward signal metrical information that detects according to the downstream signal metrical information of said reporting of user and/or base station selects at least one wave beam in said a plurality of wave beam to comprise to said user's transmitting down link signal: the upward signal metrical information that detects through the downstream signal metrical information and/or the base station of said reporting of user gets access to the signal quality of said a plurality of wave beams; The wave beam of selecting signal quality described in said a plurality of wave beam to be superior to or equaling first threshold is to said user's transmitting down link signal.
Preferably, select at least one wave beam in said a plurality of wave beam to comprise to said user's transmitting down link signal: the wave beam of selecting to receive said user's uplink signal in said a plurality of wave beam is launched said down link signal to said user.
Preferably; Selecting at least one wave beam and the user in the said sub-district in said a plurality of wave beam to carry out the signal transmission comprises: select at least one wave beam in said a plurality of wave beam to receive said user's uplink signal, and the said user's that said at least one wave beam is received uplink signal merges processing.
Preferably, the uplink signal of selecting at least one wave beam in said a plurality of wave beam to receive said user comprises: the upward signal metrical information that detects according to the base station selects at least one wave beam in said a plurality of wave beam to receive said user's uplink signal.
Preferably, the uplink signal that the upward signal metrical information that detects according to the base station selects at least one wave beam in said a plurality of wave beam to receive said user comprises: the signal quality that gets access to said a plurality of wave beams through the upward signal metrical information of said base station detection; The wave beam of selecting signal quality described in said a plurality of wave beam to be superior to or equaling second threshold value receives said user's uplink signal.
Preferably, said a plurality of wave beams are covered after the same sub-district, also comprise: detect first user of said sub-district and the spatial separation property between second user; Be superior under the situation of the 3rd threshold value said first user and the multiplexing identical running time-frequency resource of said second user in said spatial separation property.
Preferably; Be superior in said spatial separation property under the situation of the 3rd threshold value; Said first user and the multiplexing identical running time-frequency resource of said second user comprise: under the situation of interference between said first user and said second user less than the 4th threshold value, and said first user and the multiplexing identical running time-frequency resource of said second user; Perhaps, the wave beam at the wave beam of the uplink signal that receives said first user and the uplink signal that receives said second user does not exist under the situation of common factor said first user and the multiplexing identical running time-frequency resource of said second user; Perhaps; Exist under the situation that part occurs simultaneously at the wave beam of the wave beam of the uplink signal that receives said first user and the uplink signal that receives said second user, select the identical running time-frequency resource of no common factor fractional reuse in said first user's of said reception the wave beam of wave beam and said second user's of reception uplink signal of uplink signal.
According to a further aspect in the invention, a kind of networking communication system device based on active antenna is provided, has comprised: module has been set, is used to be provided with source antenna and produces a plurality of wave beams; The networking module is used for said a plurality of wave beams are covered same sub-district.
Preferably, said networking module comprises: select module, be used for selecting at least one wave beam of said a plurality of wave beams and the user in the said sub-district to carry out the signal transmission.
Preferably, said device also comprises: detection module is used to detect first user of said sub-district and the spatial separation property between second user; Multiplexing module is used for detecting under the situation that said spatial separation property is superior to the 3rd threshold value said first user and the multiplexing identical running time-frequency resource of said second user at said detection module.
Through the present invention, employing is provided with source antenna and produces a plurality of wave beams; These a plurality of wave beams are covered the mode of same sub-district, solved interference and switching problem during active antenna is used, avoided extra switching and expense, can realize meticulous covering simultaneously, improve power system capacity.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart based on the networking communication system method of active antenna according to the embodiment of the invention;
Fig. 2 is the structured flowchart based on the networking communication system device of active antenna according to the embodiment of the invention;
Fig. 3 is the preferred structure block diagram according to the networking module of the embodiment of the invention;
Fig. 4 is the preferred structure block diagram based on the networking communication system device of active antenna according to the embodiment of the invention;
Fig. 5 is the flow chart based on the network-building method of active antenna multi-beam characteristic according to the embodiment of the invention one;
Fig. 6 is the sketch map based on the wireless communication system apparatus of active antenna multi-beam characteristic according to the embodiment of the invention one;
Fig. 7 is the multi-beam characteristic sketch map according to the active antenna of the embodiment of the invention one;
Fig. 8 is that the multi-beam under using according to the active antenna of the embodiment of the invention one covers sketch map;
Fig. 9 uses sketch map according to the active antenna of the embodiment of the invention two;
Figure 10 uses sketch map according to the active antenna of the embodiment of the invention three.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Present embodiment provides a kind of network coverage method, and Fig. 1 is the flow chart based on the networking communication system method of active antenna according to the embodiment of the invention, and as shown in Figure 1, this method comprises the steps:
Step S102 is provided with source antenna and produces a plurality of wave beams;
Step S104 should cover same sub-district by a plurality of wave beams.
Present embodiment is through above-mentioned steps, and a plurality of wave beams that active antenna is produced cover same sub-district, because these wave beams belong to same sub-district; Thereby can make not only can not produce with disturbing frequently, can improve transmission gain on the contrary, solve interference and switching problem during active antenna is used at the wave beam crossover region; Avoid extra switching and expense, can realize meticulous covering simultaneously, improved power system capacity; Can also reduce system complexity, help the further lifting of systematic function.
Preferably, when using a plurality of wave beams to carry out the network coverage, can select at least one wave beam among above-mentioned a plurality of wave beam to carry out signal and transmit with the user in the sub-district.In this way, can energy savings.
For example, for down link, can select at least one wave beam in above-mentioned a plurality of wave beam to user's transmitting down link signal.Preferably; Can select according to the upward signal metrical information that the downstream signal metrical information and/or the base station of reporting of user are detected; Such as, the signal quality that downstream signal metrical information and/or the upward signal metrical information through reporting of user gets access to a plurality of wave beams; The wave beam of selecting signal quality in above-mentioned a plurality of wave beam to be superior to or equaling first threshold is to user's transmitting down link signal; Perhaps also can be according to one or more wave beam of signal quality selective sequential from high to low in these a plurality of wave beams to user's transmitting down link signal; Perhaps can also directly select to be used in above-mentioned a plurality of wave beams to receive the wave beam of user's uplink signal, to user's transmitting down link signal.In this way, promoted the use flexibility of this programme.
Again for example,, can select at least one wave beam in a plurality of wave beams to receive user's uplink signal, and this user's that above-mentioned at least one wave beam is received uplink signal merge processing for up link.Preferably, can select according to the upward signal metrical information that the base station is detected, such as, the upward signal metrical information that detects through the base station gets access to the signal quality of a plurality of wave beams; The wave beam of selecting signal quality in a plurality of wave beams to be superior to or equaling second threshold value receives user's uplink signal; Perhaps also can receive user's uplink signal according to one or more wave beam of the signal quality selective sequential from high to low in these a plurality of wave beams; To the wave beam of user's transmitting down link signal, receive user's uplink signal in the above-mentioned a plurality of wave beams of perhaps all right directly selection.Wherein, above-mentioned first threshold can equate with second threshold value, also can be unequal.In this way, promoted the use flexibility of this programme.
In addition; In order further to promote utilization ratio of wireless resources; Can also the spatial separation property between the certain user in the sub-district be detected; Here be that example describes with any two users (first user and second user) in this sub-district, be superior under the situation of the 3rd threshold value that first user and second user can multiplexing identical running time-frequency resources in the spatial separation property that detects between first user and second user.Need to prove that it is convenient that " first " " second " in present embodiment and the following preferred embodiment or the like is merely narration, do not have particular order etc., do not constitute the qualification to the embodiment of the invention.
For example, under the situation of interference less than the 4th threshold value between first user and second user, can think that the spatial separation property between first user and second user is superior to the 3rd threshold value, then first user can multiplexing identical running time-frequency resource with second user.Wherein, Judgement for the interference between first user and second user; Multiple mode can be arranged, such as, when first user is positioned at the edge of active antenna wave beam i and the edge that second user is positioned at active antenna wave beam j; On the signal strength signal intensity that can detect useful signal on the i wave beam that first user receives and the j wave beam that receives the difference of the signal strength signal intensity of interference signal or ratio greater than a certain designated value, can think that then interference between first user and second user is less than the 4th threshold value.
Again for example; Do not exist under the situation of common factor at the wave beam of the uplink signal that receives first user wave beam with the uplink signal that receives second user; Can think that the spatial separation property between first user and second user is superior to the 3rd threshold value, then first user can multiplexing identical running time-frequency resource with second user.
Again for example; There is under the situation that part occurs simultaneously the identical running time-frequency resource of no common factor fractional reuse in the wave beam of uplink signal that can selective reception first user and the wave beam of reception second user's uplink signal at the wave beam of the wave beam of the uplink signal that receives first user and the uplink signal that receives second user.
Corresponding to said method, present embodiment also provides a kind of networking communication system device based on active antenna, and this device is used to realize the foregoing description and preferred implementation, has carried out repeating no more of explanation.As following employed, the combination of the software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, perhaps the realization of the combination of software and hardware also maybe and be conceived.
Fig. 2 is the structured flowchart based on the networking communication system device of active antenna according to the embodiment of the invention, and as shown in Figure 2, this device comprises: module 22 and networking module 24 are set, are elaborated in the face of each module down.
Module 22 is set, is used to be provided with source antenna and produces a plurality of wave beams; Networking module 24 and is provided with module 22 and links to each other, and is used for said a plurality of wave beams are covered same sub-district.
Present embodiment is through said apparatus, and a plurality of wave beams that employing are provided with the active antenna generation of module 22 settings cover same sub-district through networking module 24, because these wave beams belong to same sub-district; Thereby can make and not only can not produce with disturbing frequently at the wave beam crossover region; Can improve transmission gain on the contrary, solve interference and switching problem during active antenna is used, avoid extra switching and expense; Simultaneously can realize meticulous covering; Improve power system capacity, can also reduce system complexity, help the further lifting of systematic function.
Fig. 3 is the preferred structure block diagram according to the networking module 24 of the embodiment of the invention, and is as shown in Figure 3, and networking module 24 can comprise: select module 242, be used for selecting at least one wave beam of these a plurality of wave beams and the user in the sub-district to carry out the signal transmission.
Fig. 4 is the preferred structure block diagram based on the networking communication system device of active antenna according to the embodiment of the invention; As shown in Figure 4; This device can also comprise: detection module 42, link to each other with networking module 24, and be used for first user of detected cells and the spatial separation property between second user; Multiplexing module 44 links to each other with detection module 42, is used for detecting under the situation that spatial separation property is superior to the 3rd threshold value first user and the multiplexing identical running time-frequency resource of second user at detection module 42.
Describe below in conjunction with preferred embodiment, following preferred embodiment has combined the foregoing description and preferred implementation thereof.
Embodiment one
The technical schemes and the device that strengthen covering performance, elevator system capacity in a kind of wireless communication system based on active antenna are provided in this preferred embodiment.This scheme can effectively solve interference problem, adjusts the sub-district flexibly and covers and the elevator system capacity, for wireless communication system two-forty high power capacity demand and with disturbing the covering problem that brings that a kind of networking solution that is prone to row flexibly is provided frequently.
Fig. 5 is the flow chart based on the network-building method of active antenna multi-beam characteristic according to the embodiment of the invention one, and is as shown in Figure 5, and the networking application scheme based on active antenna that this preferred embodiment proposes comprises the steps:
Step S502 is provided with the weights coefficient on each a period of time amplitude of source antenna and the phase place, produces N wave beam, and the part in N the wave beam or all wave beam region covered are belonged to same sub-district, adopts identical cell number; Here N is a positive integer, and for each cellular cell, the size of N value can be inequality.
Wherein, the N of an active antenna wave beam can be a vertical direction here, or horizontal direction, or the combining etc. of vertical direction and horizontal direction.
Preferably, each beam coverage area can be divided according to characteristics such as wireless environment and distribution of traffic, confirms the antenna pattern information of each wave beam to obtain corresponding antenna weights coefficient according to each wave beam covering demand.
Preferably, each beam antenna directional diagram and overlay area can be adjusted through configurating base station, satisfy real network and cover demand.Optional; The base station also can each beam antenna directional diagram of adaptive adjustment active antenna (such as through changing mode such as antenna a period of time weights coefficient); Adapt to the variation (such as the variation of wireless environment, user distribution, distribution of traffic etc.) in the network, satisfy real network and cover demand.
Step S504; According to metrical information, select the user is sent and receives the wave beam of signal, for example in implementation process; For down link; L beam transmission signal in the above-mentioned active antenna N wave beam can like descending Reference Signal Received Power, channel quality information etc., be selected according to the downstream signal metrical information of reporting of user in the base station; Here 1≤L≤N, and for different user, the L value maybe be different.
Optional, L beam transmission signal in the above-mentioned active antenna N wave beam also can be selected according to the upward signal metrical information of the user's transmission that receives in the base station.
For up link, the base station can select M wave beam in N wave beam of active antenna to receive signal according to the upward signal metrical information, and the signal that receives on M the wave beam of receiver to active antenna merges processing; Here 1≤M≤N, and for different user, the M value maybe be different.
Preferably, descendingly can directly adopt up beam selection result, such as having in the system applies of reciprocity at the up-downgoing wireless channel.
Preferably, the transmitting power on the active antenna different beams can be inequality.According to the beam coverage area characteristics, the transmitting power on the adjustment active antenna different beams can effectively improve systematic function.
Step S506 preferably, can adjudicate the spatial separation property between each user, if spatial separation property is relatively good, then gets into step S508, otherwise process ends.
Step S508, good for spatial separation property, the less user of interference ratio each other, multiplexing identical running time-frequency resource can the elevator system capacity.
This preferred embodiment also provides a kind of wireless communication system apparatus based on active antenna multi-beam characteristic, and this device can effectively solve interference problem, realizes that meticulous flexible net covers, and promotes capability of communication system.
Fig. 6 is the sketch map based on the wireless communication system apparatus of active antenna multi-beam characteristic according to the embodiment of the invention one, and as shown in Figure 6, this device includes source antenna, baseband processing unit and control unit; Wherein, Baseband processing unit comprises scheduling and resource distribution module (having realized the function of above-mentioned processing module 24 and Multiplexing module 44) and baseband module (having realized the above-mentioned function that module 22 is set, selects module 242 and detection module 42), and baseband module comprises that the antenna weights are provided with submodule (having realized being provided with the function of module 22), user wave beam chooser module (having realized selecting the function of module 242) and user isolation degree judgement submodule (having realized the function of detection module 42).
Above-mentioned active antenna can comprise a plurality of poliarizing antenna a period of time, each polarization independent feed of a period of time and corresponding one road transceiver channel.Can produce N wave beam through each antenna a period of time amplitude and phase place weights coefficient are set, cover a cellular cell.
Above-mentioned control unit can be provided with each antenna a period of time amplitude and phase place weights coefficient, satisfies network coverage demand.Optional, through detecting the variation (such as the variation of wireless environment, user distribution, distribution of traffic etc.) in the network, each beam antenna directional diagram of self adaptation adjustment active antenna satisfies real network and covers demand.Fig. 7 is the multi-beam characteristic sketch map according to the active antenna of the embodiment of the invention one, and is as shown in Figure 7, and the weights coefficient on each antenna a period of time amplitude and the phase place can be set, and produces a plurality of wave beams and covers cellular cell.Fig. 8 is that the multi-beam under using according to the active antenna of the embodiment of the invention one covers sketch map, and as shown in Figure 8, in practical application, a plurality of wave beams of active antenna can be vertical direction, shown in sub-district among Fig. 81; Perhaps on the horizontal direction, shown in the sub-district among Fig. 82; Or the combination of vertical direction and horizontal direction, shown in sub-district among Fig. 83.
Above-mentioned antenna weights are provided with the antenna weights coefficient that submodule can be confirmed according to control unit, combine the result of user wave beam selection module, and corresponding antenna weights coefficient when each user transmitted and received signal is set.
Preferably; For down link; Above-mentioned user wave beam chooser module can be used for: according to the downstream signal metrical information of reporting of user, like descending Reference Signal Received Power, channel quality information etc., select L beam transmission signal in the above-mentioned active antenna N wave beam; Optional, also can select L beam transmission signal in the above-mentioned active antenna N wave beam according to the upward signal of the user's transmission that receives.Preferably, this user wave beam chooser module can also be used for the adjustment of transmitting power on the different beams.
Preferably; For up link; Above-mentioned user wave beam chooser module can also be used for: the antenna radio frequency unit passes to baseband processing unit with the upward signal that receives, and M best wave beam of selective reception signal quality carries out signal reception merging in the beam selection submodule.Preferably, this user wave beam chooser module can also be used for the up beam selection result of descending direct employing and sends signal.
Above-mentioned user isolation degree judgement submodule can be according to the downstream signal metrical information of user feedback, and the upward signal metrical information that perhaps receives in conjunction with the result of user wave beam chooser module, is differentiated the space isolation between each user.
Above-mentioned scheduling and resource distribution module can be in to user scheduling and resource allocation process, for the good user of isolation, and multiplexing identical running time-frequency resource.
Can find out that the scheme in this preferred embodiment covers same cellular cell with a plurality of wave beams that device adopts active antenna to produce, and than other application characteristic such as horizontal sectorization, vertical sectorization, has a series of advantages:
1. this programme is simple, and the wave beam number of active antenna can be realized and adjusts, realize optimum meticulous covering according to actual conditions;
2. avoided interference problem as signal brings between the different beams under level, the vertical sector characteristic;
3. many wave beams send and receive the gain that signal brings simultaneously and can promote marginal user performance, further solve covering problem;
4. avoided as under level, the vertical sector characteristic because the switchover policy problem and the expense of the complicacy that the increase of sector number and crossover region brings;
5. preferably,, do not have serious disturbance between each wave beam, can between different beams, do and emptyly divide multiplexing time-frequency resource, elevator system capacity for spatial separation property wave beam preferably.
Embodiment two
Fig. 9 uses sketch map according to the active antenna of the embodiment of the invention two; As shown in Figure 9; Divide each beam coverage area of active antenna according to characteristics such as wireless environment and distribution of traffic; Control unit is confirmed concrete antenna pattern information according to each wave beam covering demand, obtains corresponding antenna weights coefficient.For a certain cellular cell of cordless communication network, the customer group in zone is covered by wave beam i in the active antenna N wave beam and wave beam j respectively shown in Fig. 9 bend, and note wave beam i and wave beam j corresponding antenna weights are respectively w
iAnd w
j, the synthetic corresponding weights of antenna pattern of wave beam i and wave beam j are w
Ij
The base station is according to certain time sequence, sends after successively the downlink reference signal that sends to the user being multiply by the corresponding weights coefficient of each wave beam;
User's (User Equipment abbreviates UE as) receives the downlink reference signal that send the base station, and gives the base station according to corresponding sequential with the feedback information that measures, like descending Reference Signal Received Power, downlink channel quality information etc.
The downstream signal metrical information that user wave beam chooser module is returned according to user feedback is calculated the received signal quality information P on N wave beam of active antenna
1, P
2..., P
NIn this process, only need consider the transmitting power difference of reference signal and data-signal, convert according to this difference power.
User wave beam chooser module compares received signal quality information of estimating to obtain and a certain threshold value T that is provided with in advance, selects P
1, P
2...,
PL wave beam greater than this threshold value T among the N transmits.Preset threshold value T can obtain through emulation assessment or outfield actual measurement statistics in the practical implementation process.As shown in Figure 9, user UE1 is in the crossover region that wave beam i and wave beam j cover, and baseband processing unit is estimated to obtain according to the method described above, UE1 receive from the received signal quality P1 on active antenna wave beam i and the wave beam j
iAnd P1
jAll about preset threshold value T selects wave beam i and wave beam j simultaneously this user to be sent downstream signal, and the signal times that is about to send to this user is with weight w
IjAfter pass to the antenna radio frequency unit and launch.For upward signal, to select to merge processing from the signal on wave beam i and the wave beam j, the signal times that promptly respectively the antenna radio frequency unit is received is with weights coefficient w
iAnd w
jReceive afterwards to merge and handle.
This preferred embodiment has not only solved the problem of disturbing, and wave beam i and wave beam j transmit to user UE1 simultaneously, has promoted signal quality, has strengthened covering performance.
Embodiment three
Figure 10 uses sketch map according to the active antenna of the embodiment of the invention three; Shown in figure 10, control unit detects the interior distribution of traffic of network and changes, according to service distribution; Obtain active antenna footprint of a beam domain information; Obtain corresponding antenna weights coefficient, adjustment active antenna weights coefficient satisfies network coverage demand.Such as, distribution of traffic is changed to zone shown in Figure 10 bend by Fig. 9 in a certain cellular cell, and the base station detects traffic carrying capacity and changes, and obtains the footprint of a beam domain information, and adjustment active antenna wave beam i and wave beam j corresponding antenna weights coefficient are w
i' and w
j'.
In the practical implementation process, low than on the wave beam j of transmitting power on the wave beam i can be set.
The base station is according to certain time sequence, successively the reference signal that sends to the user multiply by each wave beam weight coefficient after, the radio frequency unit of passing to active antenna sends; The user receives the reference signal that send the base station, and gives the base station according to corresponding sequential with the feedback information that measures, like descending Reference Signal Received Power, downlink channel quality information etc.
The downstream signal metrical information that user wave beam chooser module is returned according to user feedback is estimated from the received signal quality information P on the active antenna N wave beam
1, P
2..., P
NIn this process, only need consider the transmitting power difference of reference signal and data-signal, convert according to this difference power.
User wave beam chooser module compares received signal quality information of estimating to obtain and a certain threshold value T that is provided with in advance, selects P
1, P
2..., P
NIn transmit greater than L the wave beam of this threshold value T.Preset threshold value T can obtain through emulation assessment or outfield actual measurement statistics in the implementation process.Shown in figure 10, user UE2 and user UE3 lay respectively at the fringe region of active antenna wave beam i and wave beam j covering, for UE2, and the signal quality P2 that receives from active antenna wave beam i
iMuch larger than signal quality P2 from active antenna wave beam j
j, select to adopt active antenna wave beam i to send signal, promptly baseband processing unit will send to this user signal times with weight w
i' after pass to the antenna radio frequency unit and launch.For upward signal, select signal on the wave beam i as the signal that receives, promptly baseband processing unit signal times that the antenna radio frequency unit is received is with weights coefficient w
i' back receives handles; Similarly, for UE3, baseband processing unit selects to adopt active antenna wave beam j to send and receive signal.
In addition, can also judge spatial separation property between each user, for the good user of isolation, the multiplexing time-frequency resource for example can specifically comprise: calculate and send to the useful signal quality information P on this user respective beam
SCalculating is from the interference signal quality information P that treats on the users multiplexing respective beam
ICompare P
SAnd P
ISize, if P
SAnd P
IDifference explains that greater than a certain threshold value T ' that is provided with in advance the interference between the user is less, carries out the multiplexing of running time-frequency resource.Preset threshold value T ' can obtain through emulation assessment or outfield actual measurement statistics in the implementation process.Shown in figure 10, for UE2 and UE3, because UE2 goes up useful signal intensity P2 on this wave beam
iMuch larger than from the interference signal intensity P2 on the wave beam j (treat users multiplexing corresponding wave beam)
j, the UE3 running time-frequency resource identical with the UE2 reusable then, thereby further elevator system capacity are described between UE2 and the UE3 not than strong jamming.
Embodiment four
This preferred embodiment has identical scene with embodiment one; Its difference is such scheme and device are used for time-division system; As shown in Figure 9, for time-division system, the characteristic of baseband processing unit up-downgoing channel reciprocity capable of using selects the user is transmitted and received the wave beam of signal.
In the practical implementation process, baseband processing unit can select this user is launched the wave beam of the active antenna of uplink and downlink signals according to the received power of uplink reference signals.
For example, the uplink reference signals from the user that the active antenna radio frequency unit will receive is passed to baseband processing unit, and baseband processing unit is the corresponding weights coefficient of each wave beam figuration successively, and the signal power that obtains is Prs
1, Prs
2..., Prs
NEstimating user receive from the received signal power P on each wave beam of active antenna
1, P
2..., P
NIn this process, can consider the transmitting power difference of reference signal and data-signal, convert according to this difference power.
User wave beam chooser module compares received signal quality information of estimating to obtain and a certain threshold value T that is provided with in advance, selects P
1, P
2..., P
NIn transmit greater than L the wave beam of this threshold value T.Preset threshold value T can obtain through emulation assessment or outfield actual measurement statistics in the practical implementation process.As shown in Figure 9, user UE1 is in the crossover region that wave beam i and wave beam j cover, and baseband processing unit is estimated to obtain according to the method described above, UE1 receive from the received signal quality P1 on active antenna wave beam i and the wave beam j
iAnd P1
jAll about preset threshold value T selects wave beam i and wave beam j simultaneously this user to be sent downstream signal, promptly baseband processing unit will send to this user signal times with weight w
IjAfter pass to the antenna radio frequency unit and launch.For upward signal, select to merge processing from the signal on wave beam i and the wave beam j, promptly the signal times that respectively the antenna radio frequency unit received of baseband processing unit is with weights coefficient w
iAnd w
jReceive afterwards to merge and handle.
This preferred embodiment has not only solved the problem of disturbing, and wave beam i and wave beam j transmit to user UE1 simultaneously, has promoted signal quality, has strengthened covering performance.
Embodiment five
This preferred embodiment has identical scene with embodiment two; Its difference is such scheme and device are used for time-division system; Shown in figure 10, for time-division system, the characteristic of baseband processing unit up-downgoing channel reciprocity capable of using selects the user is transmitted and received the wave beam of signal.
In the practical implementation process, low than on the wave beam j of transmitting power on the wave beam i can be set.Baseband processing unit selects this user is launched the wave beam of the active antenna of uplink and downlink signals according to the received power of uplink reference signals.
For example, the uplink reference signals from the user that the active antenna radio frequency unit will receive is passed to baseband processing unit, and baseband processing unit is the corresponding weights coefficient of each wave beam figuration successively, and the signal power that obtains is Prs
1, Prs
2..., Prs
NEstimating user receive from the received signal power P on each wave beam of active antenna
1, P
2..., P
NIn this process, only need consider the transmitting power difference of reference signal and data-signal, convert according to this difference power.
Baseband processing unit obtains P with estimation
1, P
2..., P
NWith a certain threshold ratio that is provided with in advance, selective reception power carries out signal greater than the wave beam of this threshold value and transmits and receives.Preset threshold value can obtain through emulation assessment or outfield actual measurement statistics in the implementation process.Shown in figure 10, user UE2 and user UE3 lay respectively at the fringe region of active antenna wave beam i and wave beam j covering, for UE2, and the signal quality P2 that receives from active antenna wave beam i
iMuch larger than signal quality P2 from active antenna wave beam j
j, select to adopt active antenna wave beam i to send signal, promptly baseband processing unit will send to this user signal times with weight w
iAfter pass to the antenna radio frequency unit and launch.For upward signal, adopt from the signal on the wave beam i as the signal that receives, promptly baseband processing unit signal times that the antenna radio frequency unit is received is with weights coefficient w
iThe back receives handles; Similarly, for UE3, baseband processing unit selects to adopt active antenna wave beam j to send and receive signal.
Judge spatial separation property between each user, for the good user of isolation, multiplexing time-frequency resource.Specifically comprise: calculate and send to the useful signal quality information P on this user respective beam
SCalculating is from the interference signal quality information P that treats on the users multiplexing respective beam
ICompare P
SAnd P
ISize, if P
SAnd P
IDifference explains that greater than a certain threshold value T ' that is provided with in advance the interference between the user is less, carries out the multiplexing of running time-frequency resource.Preset threshold value T ' can obtain through emulation assessment or outfield actual measurement statistics in the implementation process.Shown in figure 10, for UE2 and UE3, because UE2 goes up useful signal intensity P2 on this wave beam
iMuch larger than from the interference signal intensity P2 on the wave beam j (treat users multiplexing corresponding wave beam)
j, explaining does not have between UE2 and the UE3 than strong jamming, then the UE3 running time-frequency resource identical with the UE2 reusable, further elevator system capacity.
Need to prove; For the antenna weight setting in the above embodiment of the present invention and the preferred embodiment, user wave beam selection, user's space isolation decision method; Under condit without departing from the spirit and scope of the present invention; Many corrections that those skilled in the art can consider, replacing, variation, alternative and equivalent content all should be included within protection scope of the present invention.
For example; The mode that user wave beam selection mode in the above-mentioned preferred embodiment is not limited to propose among the embodiment; In another embodiment; Can not consider the difference of different channels transmitting power, the direct upward signal metrical information that receives through the downstream signal metrical information or the base station of user feedback selects the user is transmitted and received the wave beam of signal.
And for example; For the differentiation of spatial separation property between each user, also can be according to above-mentioned beam selection result, the base station differentiates each user is received between the clusters of beams of signal whether have common factor; If do not occur simultaneously between the clusters of beams; Explain that the isolation between the user is better, the interference between mutually is less, can multiplexing identical running time-frequency resource.If have part to occur simultaneously between the clusters of beams, can according to circumstances select the identical running time-frequency resource of no common factor part wave beam in the multiplexing clusters of beams.
In sum; In the networking communication system application scheme and communication system device that the embodiment of the invention provided based on active antenna; Utilize active antenna through adjusting the advantage that each antenna a period of time amplitude-phase weights comes flexible control antenna beam pattern, adopt a plurality of wave beams to cover same cellular cell; Be different from the application of level, vertical sectorization, each wave beam covers an independently sub-district, in this scheme; All beam coverage area belong to same sub-district; At the wave beam crossover region, a plurality of wave beams send and receive signal together, when avoiding disturbing between multi-beam; Improve the useful signal quality, strengthened covering performance; Relatively good like each beam space isolation of user present position, there is not serious disturbance between each wave beam, then between different beams, do empty the branch, the multiplexing time-frequency resource has promoted power system capacity.
And this technical scheme is simple, has avoided extra switching and redundancy overhead, can not increase extra complexity, and can realize meticulous covering, and control is disturbed, and improves power system capacity.
Can find out that in sum the embodiment of the invention utilizes active antenna to produce a plurality of wave beams and cover same cellular cell through adjusting each antenna a period of time amplitude-phase weights coefficient; Select corresponding wave beam to send and receive signal according to the user present position.At the wave beam crossover region, a plurality of wave beams send and receive signal together; As not having serious disturbance between each corresponding wave beam of user present position; Then the identical running time-frequency resource of reusable has solved interference and switching problem during active antenna is used, has avoided extra switching and expense; Simultaneously can realize meticulous covering, improve power system capacity.
In another embodiment, a kind of software is provided also, this software is used for carrying out the technical scheme that the foregoing description and preferred embodiment are described.
In another embodiment, a kind of storage medium is provided also, has stored above-mentioned software in this storage medium, this storage medium includes but not limited to CD, floppy disk, hard disk, scratch pad memory etc.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the networking communication system method based on active antenna is characterized in that, comprising:
Be provided with source antenna and produce a plurality of wave beams;
Said a plurality of wave beams are covered same sub-district.
2. method according to claim 1 is characterized in that, said a plurality of wave beams is covered same sub-district comprise:
Select at least one wave beam and the user in the said sub-district in said a plurality of wave beam to carry out the signal transmission.
3. method according to claim 2 is characterized in that, selects at least one wave beam and the user in the said sub-district in said a plurality of wave beam to carry out the signal transmission and comprises:
Select at least one wave beam in said a plurality of wave beam to said user's transmitting down link signal.
4. method according to claim 3 is characterized in that, selects at least one wave beam in said a plurality of wave beam to comprise to said user's transmitting down link signal:
According to the upward signal metrical information that the downstream signal metrical information of said reporting of user and/or base station are detected, select at least one wave beam in said a plurality of wave beam to said user's transmitting down link signal.
5. method according to claim 4; It is characterized in that, select at least one wave beam in said a plurality of wave beam to comprise to said user's transmitting down link signal according to the upward signal metrical information that the downstream signal metrical information and/or the base station of said reporting of user are detected:
The upward signal metrical information that downstream signal metrical information through said reporting of user and/or base station are detected gets access to the signal quality of said a plurality of wave beams;
The wave beam of selecting signal quality described in said a plurality of wave beam to be superior to or equaling first threshold is to said user's transmitting down link signal.
6. method according to claim 3 is characterized in that, selects at least one wave beam in said a plurality of wave beam to comprise to said user's transmitting down link signal:
The wave beam of selecting to receive said user's uplink signal in said a plurality of wave beam is launched said down link signal to said user.
7. according to each described method in the claim 2 to 6, it is characterized in that, select at least one wave beam and the user in the said sub-district in said a plurality of wave beam to carry out the signal transmission and comprise:
Select at least one wave beam in said a plurality of wave beam to receive said user's uplink signal, and the said user's that said at least one wave beam is received uplink signal merge processing.
8. method according to claim 7 is characterized in that, the uplink signal of selecting at least one wave beam in said a plurality of wave beam to receive said user comprises:
The upward signal metrical information that detects according to the base station selects at least one wave beam in said a plurality of wave beam to receive said user's uplink signal.
9. method according to claim 8 is characterized in that, the uplink signal that the upward signal metrical information that detects according to the base station selects at least one wave beam in said a plurality of wave beam to receive said user comprises:
Get access to the signal quality of said a plurality of wave beams through the upward signal metrical information of said base station detection;
The wave beam of selecting signal quality described in said a plurality of wave beam to be superior to or equaling second threshold value receives said user's uplink signal.
10. according to each described method in the claim 1 to 9, it is characterized in that, said a plurality of wave beams covered after the same sub-district, also comprise:
Detect first user of said sub-district and the spatial separation property between second user;
Be superior under the situation of the 3rd threshold value said first user and the multiplexing identical running time-frequency resource of said second user in said spatial separation property.
11. method according to claim 10 is characterized in that, is superior in said spatial separation property under the situation of the 3rd threshold value, said first user comprises with the multiplexing identical running time-frequency resource of said second user:
Under the situation of interference between said first user and said second user less than the 4th threshold value, said first user and the multiplexing identical running time-frequency resource of said second user; Perhaps,
Wave beam at the wave beam of the uplink signal that receives said first user and the uplink signal that receives said second user does not exist under the situation of common factor said first user and the multiplexing identical running time-frequency resource of said second user; Perhaps,
Exist under the situation that part occurs simultaneously at the wave beam of the wave beam of the uplink signal that receives said first user and the uplink signal that receives said second user, select the identical running time-frequency resource of no common factor fractional reuse in said first user's of said reception the wave beam of wave beam and said second user's of reception uplink signal of uplink signal.
12. the networking communication system device based on active antenna is characterized in that, comprising:
Module is set, is used to be provided with source antenna and produces a plurality of wave beams;
The networking module is used for said a plurality of wave beams are covered same sub-district.
13. device according to claim 12 is characterized in that, said networking module comprises:
Select module, be used for selecting at least one wave beam of said a plurality of wave beams and the user in the said sub-district to carry out the signal transmission.
14., it is characterized in that said device also comprises according to claim 12 or 13 described devices:
Detection module is used to detect first user of said sub-district and the spatial separation property between second user;
Multiplexing module is used for detecting under the situation that said spatial separation property is superior to the 3rd threshold value said first user and the multiplexing identical running time-frequency resource of said second user at said detection module.
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