CN101388701A - Customer data receiving/transmitting method, apparatus and distributed intelligent antenna system - Google Patents
Customer data receiving/transmitting method, apparatus and distributed intelligent antenna system Download PDFInfo
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Abstract
The invention discloses a method for receiving or sending user data, a device and a distributed intelligent antenna system thereof, wherein the method for sending the user data comprises: connecting more than one intelligent antenna arrays and a base station of a district, determining the intelligent antenna array which sends user downlink data according to the receiving quality of a user uplink signal on each intelligent antenna array which is connected with the base station by the base station, and sending downlink common signal channel information through each intelligent antenna array which is connected with the base station by the base station. The coverage range of an existing district can be effectively enlarged according to a scheme which is provided by the invention, the quality of downlink information which is received by users can be improved, and the disturbance of different user information on the intelligent antenna array can be reduced.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of user uplink data method of reseptance, user's downlink data transmission method, device and distributed intelligent antenna 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, in addition, because the coverage of present common sub-district is little, to carry out time of Cell searching, switching, cell update and sub-district gravity treatment all very short and leave the user for, therefore the user of high-speed mobile is at short notice in different sub-districts when mobile, easily call drop or off-grid.In order to address the above problem, need to enlarge the coverage of sub-district.
One of scheme that enlarges cell coverage area is to adopt optical fiber repeater or wireless discharging-directly station at present, but smart antenna is not supported in the repeater, and the signal life period deviation of eating dishes without rice or wine between repeater and the main website, can not support coverage distance too far away.
For addressing the above problem, Chinese patent CN 00103041.8 discloses a kind of distributed intelligent antenna system, in the scheme of this patent disclosure, a plurality of smart antenna arrays are connected on a plurality of radio-frequency (RF) transceiver of same base station by feeder cable, have realized the expansion of cell coverage area.But above-mentioned patent has only proposed a kind of concise and to the point notion of distributed intelligent antenna system, the concrete processing method of effective uplink and downlink signals in the not concrete openly distributed intelligent antenna system.Therefore, at present also not for the specific implementation system and the corresponding signal process scheme that enlarge cell coverage area.
Summary of the invention
The invention provides the device and the distributed intelligent antenna system of a kind of customer data receiving/transmitting method and realization said method, in order to solve the too small problem of cell coverage area in the prior art.
The invention provides a kind of user uplink data method of reseptance, be applied to distributed intelligent antenna system, this method comprises: more than one smart antenna array is connected with the base station of sub-district; Each smart antenna array that belongs to same sub-district receives user uplink data respectively, and sends the user uplink signal to the base station; Channel estimating is carried out to the up channel that each smart antenna array sends the user uplink signal in the base station; Utilize the channel estimation results of each smart antenna array that the user uplink signal that each smart antenna sends is carried out joint-detection respectively; The upstream data of same user after the different intelligent antenna array joint-detection is merged back decoding.
Described upstream data with the same user after the different intelligent antenna array joint-detection merges, and comprising: the upstream data of the same user after adopting high specific merging method to described different intelligent antenna array joint-detection merges.
The present invention also provides a kind of user's downlink data transmission method, is applied to distributed intelligent antenna system, and this method comprises: more than one smart antenna array is connected with the base station of sub-district; The smart antenna array that sends user's downlink data is determined according to the quality of reception of user uplink signal on each smart antenna array that is connected in the base station; The base station sends common down channel information by described each smart antenna array that is connected, and the smart antenna array user downlink data by the described transmission user downlink data of determining; Wherein, when the smart antenna array of the described transmission user downlink data of determining was at least two, each smart antenna array of the described transmission user downlink data of determining used identical carrier frequency, identical time slot to send user's downlink data with identical code channel.
Described base station is according to the quality of reception of user uplink signal on each smart antenna array that is connected, determine the smart antenna array that sends user's downlink data, comprise: the user uplink signal receiving quality on each smart antenna array that base station measurement is connected obtains corresponding measured value; Select a best measured value of the characterization signal quality of reception or select a plurality of preferably measured values of the characterization signal quality of reception; The smart antenna array of the measured value correspondence selected is defined as the smart antenna array of described transmission user downlink data.
User uplink signal receiving quality on each smart antenna array that described base station measurement is connected, comprise: the signal to noise ratio of base station measurement user uplink signal on each smart antenna array, or the amplitude and noise ratio of base station measurement user uplink signal on each smart antenna array, or the received signal code power on each smart antenna array of base station measurement.
Before the user uplink signal receiving quality on each smart antenna array that described base station measurement is connected, also comprise: channel estimating is carried out to the up channel that transmits the user uplink signal on each smart antenna array that is connected in the base station; And each smart antenna array that calculating is connected according to channel estimation results is to user's downlink forming vector;
Described each smart antenna array by the transmission user downlink data determined uses identical carrier frequency, identical time slot and identical code channel to send user's downlink data, and also comprise: each smart antenna array of the described transmission user downlink data of determining carries out wave beam forming according to described downlink forming vector to the user to user's downlink data.
Described base station is carried out after the channel estimating to the up channel that transmits the user uplink signal on each smart antenna array that is connected, also comprise: the base station is measured total bandwidth power, receiving slot sign indicating number power, transmitter code power, Interference Signal Code Power, transmission gross power and the user's of each smart antenna array that is connected angular position information respectively according to described channel estimation results, and reports to radio network controller; Radio network controller according to reporting information for the user distributes described carrier frequency, time slot and code channel.
In above-mentioned user's downlink data transmission method, when sending user's downlink data,, on the smart antenna array of the described transmission user downlink data of determining, carry out transmitting power control also according to the uplink power control order in this user uplink signal.
Foregoing user's downlink data transmission method also comprises: the uplink pilot time slot that each smart antenna array that is connected with the base station carries out the user respectively detects and reports the base station, if the base station is judged different smart antenna arrays and detect the identical uplink synchronous sequence SYNC_UL that same user sends in the uplink pilot time slot of same subframe, the best corresponding smart antenna array of selective reception user uplink signal quality is responded this user.
Preferably, when having long tunnel in the coverage cell of described base station, each the non intelligent antenna array in the long tunnel is handled as one of smart antenna array that is connected with described base station.
The invention provides a kind of user uplink data processing unit, this device comprises:
Receiving element is used to receive the user uplink signal that each smart antenna array of being in same sub-district sends;
Channel estimating unit, the user uplink signal that is used for receiving according to described receiving element carries out channel estimating to the up channel that transmits the user uplink signal on each smart antenna array;
The joint-detection unit is used to utilize channel estimating unit that the channel estimation results of each smart antenna array is carried out joint-detection respectively to the user uplink signal of each smart antenna array;
Merge decoding unit, be used for the upstream data of the same user after the different intelligent antenna array joint-detection is merged back decoding.
The present invention also provides a kind of user's downlink data dispensing device, and this device comprises:
Downlink data sends determining unit, is used to measure the quality of reception of user uplink signal on each smart antenna array, determines the smart antenna array that sends user's downlink data;
Transmitting element is used for sending common down channel information to each smart antenna array, and the smart antenna array that is used for sending according to downlink data the transmission user downlink data that determining unit determines sends user's downlink data.
Preferably, described user's downlink data dispensing device also comprises channel estimating unit, and the user uplink signal that is used for sending according to each smart antenna array carries out channel estimating to the up channel that transmits the user uplink signal on each smart antenna array; Computing unit is used for calculating the downlink forming vector of each smart antenna array to the user according to the channel estimation results of described channel estimating unit; Described transmitting element also is used to control each smart antenna array that sends user's downlink data and carries out wave beam forming according to the downlink forming vector that described computing unit provides.
Preferably, above-mentioned user's downlink data dispensing device also comprises the transmitting power control unit, is used for resolving the uplink power control order of the user uplink signal on each smart antenna array, and sends to described transmitting element; Described transmitting element also is used for controlling the transmitting power of the smart antenna array of the described transmission user downlink data of determining according to the described power control command that receives.
Preferably, above-mentioned user's downlink data dispensing device also comprises: access control unit at random, be used for judging different smart antenna arrays and whether detect the identical uplink synchronous sequence SYNC_UL that same user sends at the uplink pilot time slot of same subframe, if detect, then send it back and to be notified to described transmitting element; Described transmitting element also is used for according to the best corresponding smart antenna array of described response notification selective reception user uplink signal quality this user being responded.
The present invention also provides a kind of base station, comprises foregoing user uplink data processing unit.
Above-mentioned base station also can comprise foregoing arbitrary user's downlink data dispensing device.
The invention provides a kind of distributed intelligent antenna system, comprise more than one smart antenna array, also comprise foregoing arbitrary base station, described each smart antenna array links to each other with described base station; Wherein, each smart antenna array is used to transmit between base station and the user/downlink data.
Preferably, each smart antenna array in the described distributed intelligent antenna system is arranged at the different location in this base station coverage cell; Perhaps, described each smart antenna array is concentrated the same place that is arranged in this base station coverage cell.
Preferably, when comprising long tunnel in the coverage cell of described base station, above-mentioned distributed intelligent antenna system also comprises the non intelligent antenna array that is arranged in the described long tunnel, and described non intelligent antenna array is connected with described base station.
Preferably, when base station in above-mentioned arbitrary distributed intelligent antenna system sends user's downlink data, the common channel information that described each smart antenna array of concentrating the same place that is arranged in this base station coverage cell sends or the user's downlink data regular hour skew chip that staggers.
As fully visible, scheme provided by the invention can be brought following beneficial effect:
Distributed intelligent antenna system provided by the invention is by being connected to same base station with a plurality of smart antenna arrays, effectively enlarge the cell range that former base station covers, avoided the user of high-speed mobile to carry out the danger of call drop and off-grid in Cell searching, switching and the renewal process.
The base station is according to the quality of reception of user uplink signal on each smart antenna array that is connected in the scheme provided by the invention, determine the smart antenna array that sends user's downlink data, and on the smart antenna array of determining, send user's downlink data, therefore the transmission of user's downlink data is more targeted, effectively improve the quality of the downlink data of user's reception, and reduced the load of all the other smart antenna arrays.In addition, because on having carried out in the communication process/down transmitting power control and synchronisation offset control, reduced intrasystem interference effectively and guaranteed user's uplink synchronous.
In addition, for concentrating a plurality of smart antennas of laying to be connected to the system that same base station is formed, can further improve the transmitting power and the receiving gain of each smart antenna array.In addition, for the situation that has long tunnel in the sub-district, the present invention uses non intelligent antenna array to replace smart antenna array in long tunnel, has solved the covering problem in tunnel, has further improved user's signal quality in the tunnel.
Description of drawings
The user uplink data method of reseptance flow chart that Fig. 1 provides for the embodiment of the invention;
User's downlink data transmission method key step flow chart that Fig. 2 provides for the embodiment of the invention;
Two of user's downlink data transmission method flow chart that Fig. 3 provides for the embodiment of the invention;
A kind of user uplink data processing unit structural representation that Fig. 4 provides for the embodiment of the invention;
One of a kind of user's downlink data dispensing device structural representation that Fig. 5 provides for the embodiment of the invention;
Two of a kind of user's downlink data dispensing device structural representation that Fig. 6 provides for the embodiment of the invention;
A kind of distributed intelligent antenna system structural representation that Fig. 7 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the embodiment of the invention is elaborated.
Figure 1 shows that the user uplink data method of reseptance journey figure that the embodiment of the invention provides, this method may further comprise the steps:
S101: more than one smart antenna array is connected with the base station of sub-district.
For example: suppose only to have in the former network smart antenna array A to be connected, in embodiments of the present invention, also the smart antenna array B in the network is connected with the base station of sub-district 1 with smart antenna array C with the base station of sub-district 1; That is: smart antenna array A, smart antenna array B and smart antenna array C are as the smart antenna array of sub-district 1.
S102: each smart antenna array that belongs to same sub-district receives user uplink data respectively, and sends the user uplink signal to the base station.
In this step, on the base station of supposing to have smart antenna array A, B, C to be connected to same sub-district, then smart antenna array A, smart antenna array B and smart antenna array C receive the upstream data that the user sends by up channel, and send the base station of this sub-district 1 to.
S103: channel estimating is carried out to the up channel that each smart antenna array sends the user uplink signal in the base station.
For example: can adopt the channel impulse response of existing calculating user uplink signal on antenna the user uplink signal to be carried out channel estimating, obtain the channel impulse response of user uplink signal on each smart antenna array as the channel estimating method of channel estimation value.
S104: utilize the channel estimation results of each smart antenna array that the user uplink signal that each smart antenna sends is carried out joint-detection respectively.
Joint-detection is the best multiuser detection of demodulation performance, after joint-detection, the user data of each carrier wave on each smart antenna array is assigned in each mutually non-interfering time slot, make in final every time slot the concurrent user data seldom, can greatly eliminate multiple access disturbs, suppress near-far interference, improve power system capacity.After this step is carried out, the upstream data after the demodulation that can obtain different user on each smart antenna array.
S105: the upstream data of the same user after the different intelligent antenna array joint-detection is merged.
In this step, can use maximum ratio method each user uplink data after to joint-detection that merges to merge.For example: continue to use above-mentioned hypothesis, if the base station of sub-district 1 has connected smart antenna array A, smart antenna array B and smart antenna array C, then after the joint-detection, smart antenna array A, B, the last upward signal that certain user may all be arranged of C, then the base station merges the maximum ratio method that merges of the joint detection results employing of this user on smart antenna array A, B, the C in this step.
In addition, when joint-detection also can be carried out at the channel estimation results to each smart antenna array in the base station, calculate user uplink signal signal to noise ratio (Signal to Noise Ratio on each smart antenna array, SNR), therefore can carry out high specific to this user's of measuring the SNR of upward signal on three smart antenna arrays in this step and merge the user uplink data after obtaining merging.
S106: the user uplink data after the base station is combined is deciphered the user uplink data after obtaining deciphering.
User uplink data after the decoding can further report to radio network controller by the base station, and (Radio Network Controller RNC) or carry out all the other processing, does not describe in detail at this.
Figure 2 shows that user's downlink data transmission method key step flow chart that the embodiment of the invention provides, comprising:
S201: more than one smart antenna array is connected with the base station of sub-district, as the smart antenna array that belongs to this sub-district;
S202: the smart antenna array that sends user's downlink data is determined according to the quality of reception of user uplink signal on each smart antenna array that is connected in the base station;
S203: the base station sends common down channel information by each smart antenna array that is connected, and sends user's downlink data by the smart antenna array of the described transmission user downlink data of determining.
Wherein, when the smart antenna array of the transmission user downlink data of determining among the step S202 was at least two, base station each smart antenna array by the transmission user downlink data determined used identical carrier frequency, identical time slot and identical code channel to send user's downlink data in this step.
Preferably, part common channel information that also can the user is public sends user's downlink data by the smart antenna array of the described transmission user downlink data of determining.For example: can be with Common Control Physical Channel (Primary Common Control Physical Channel, PCCPCH), paging channel (PagingChannel, PCH) and pilot channel (PIlot Channel PICH) sends on each smart antenna array during information of same and sends; With forward access channel (Forward Access Channel, FACH), physical access channel (Fast Physical Access Channel, FPACH) and synchronization control channel (Synchronization Control Channel SCCH) waits the information of common signal channel to send on one of the SNR maximum of upward signal of the user who determines or the several preferably smart antenna arrays of SNR and sends.
Below the embodiment of the user's downlink data transmission method in the above-mentioned distributed intelligent antenna system is elaborated.
Figure 3 shows that user's downlink data transmission method that the embodiment of the invention provides flow chart of steps two, this method may further comprise the steps:
S301: more than one smart antenna array is connected with the base station of sub-district, as the smart antenna array that belongs to this sub-district.
S302: each smart antenna array that belongs to same sub-district receives the user uplink signal, and sends the base station to.
S303: channel estimating is carried out to the up channel that transmits the user uplink signal on each smart antenna array in the base station.
S304: measure each measured value that characterizes the user uplink signal receiving quality on each smart antenna array according to channel estimation results, determine the smart antenna array that sends user's downlink data according to measured value.
Wherein, the user uplink signal receiving quality on each smart antenna array that base station measurement is connected obtains corresponding measured value; Measured value that the base station selected then characterization signal quality of reception is best or select the characterization signal quality of reception preferably before the smart antenna array of several measured value correspondences be defined as the smart antenna array of described transmission user downlink data.For example, the SNR of user uplink signal on each smart antenna array can be measured in the base station, then with a smart antenna array of SNR maximum as the smart antenna array that sends user's downlink data, perhaps with the descending arrangement of SNR value, the smart antenna array that preceding several SNR values of arranging out are corresponding is as the smart antenna array that sends user's downlink data; Perhaps, the base station is according to preset threshold, with the SNR that calculates greater than the smart antenna array of setting threshold smart antenna array as the SNR maximum of determining.
Wherein, the amplitude and noise ratio of user uplink signal on each smart antenna array also can be measured in the base station, or measures the received signal code power on each smart antenna array, and selects user uplink signal receiving qualities smart antenna array preferably and preferably according to these measured values.
In addition, each smart antenna array be connected downlink forming vector to the user is also calculated according to channel estimation results in the base station in this step.
S305: the base station sends common down channel information by described each smart antenna array that is connected, and sends user's downlink data by the smart antenna array of the described transmission user downlink data of determining.
In addition, in this step, when sending user's downlink data, each smart antenna array can carry out figuration to wave beam according to the downlink forming vector that calculates among the step S304.
Among the above-mentioned steps S304, the total bandwidth power of each smart antenna is also measured in the base station according to channel estimation results, receiving slot sign indicating number power, the SNR of user uplink signal, transmitter code power, Interference Signal Code Power and transmission gross power, and measure a total bandwidth power of the smart antenna array that received signal is the strongest according to these, receiving slot sign indicating number power, the SNR of user uplink signal, transmitter code power, the transmission gross power of Interference Signal Code Power and this smart antenna array reports to RNC, so that (Radio Resource Management carries out resource allocation (for the user of each sub-district distributes time slot according to above-mentioned measurement item in the time of RRM) to RRM, code channel and frequency resource).Wherein, the base station also can report to RNC with the average power of all smart antenna array Interference Signal Code Powers and transmission gross power; Perhaps, the base station also can all report to RNC with every measured value of all smart antenna arrays, so that RRM carries out certain optimizing and revising according to all measured values in resource allocation.
In addition, the base station is also carried out angle to the channel estimation results of this user's upward signal to this user according to each smart antenna array and is arrived (Arrival of Angle among the step S304, AOA) measure, and with regenerative repeating unit (the Regenerative Repeater Unit of this user's correspondence, RRU) numbering and should numbering corresponding AOA information report to RNC, so RNC can number according to the RRU of reception and corresponding AOA information is determined this user's geographical position.Wherein, the base station can report the AOA information of a plurality of RRU simultaneously to RNC.
Because code division multiple access (Code Division Multiple Access, CDMA) system is an interference limiting system, necessary transmitting power control (Transport Power Control, TPC) interference level of restriction system inside effectively, reduce in the sub-district and the interference of minizone, also can reduce user's power consumption simultaneously.Therefore, in user's downlink data transmission method that the embodiment of the invention provides, when sending user's downlink data, also need to carry out down transmitting power control, when promptly sending user's downlink data, according to the uplink power control order in this user uplink signal, on the smart antenna array of the described transmission user downlink data of determining, carry out transmitting power control.Perhaps, each smart antenna array uplink transmission power control command individual processing that can be respectively send over according to the user side of receiving separately as required.For example: smart antenna array 1 detects in the TPC order in the user uplink signal and requires to improve down transmitting power, then antenna array 1 can increase transmitting power as required, though smart antenna array 2 also detects in the TPC order that the user sends and requires to improve down transmitting power, smart antenna array 2 can not improve self transmitting power.
Wherein, after carrying out the transmitting power adjustment, must guarantee the descending TPC control command unanimity that the different intelligent antenna array sends to same user so that corresponding user receive behind the signal of each smart antenna array can this TPC order of correct demodulation and make the corresponding transmission power adjustment.
Similarly, when carrying out down transmitting power control, the base station also sends simultaneous bias (SS) order by each smart antenna array to respective user, and the user adjusts according to this SS order carrying out timing, guarantees that this user's upward signal is synchronous.
User's downlink data transmission method shown in the front is the user who connects with the base station at, when certain user inserts the sub-district of certain smart antenna array composition at random, this user can receive descending pilot frequency time slot (the Downlink Pilot Time Slot that this cell base station sends, DwPTS) information, then this user can estimate to determine the x time of uplink synchronous sequence (SYNC_UL) according to the power of DwPTS that receives and/or PCCPCH.A plurality of then smart antenna arrays carry out uplink pilot time slot (UplinkPilot Time Slot, UpPTS) detect and report the base station of connection, if the different intelligent antenna array detects identical SYNC_UL in same subframe, then the base station is not responded the user that this inserts at random, the best corresponding smart antenna array of perhaps base station selected reception user uplink signal quality is responded this user, be that the base station sends the TPC/SS order for this user by that best smart antenna array of the reception user uplink signal quality of determining, so that this user sets up uplink synchronous.
The embodiment of the invention provides user's downlink data transmission method and the user uplink data processing method in a kind of distributed intelligent antenna system, by channel estimating to the user uplink signal, determine the quality of reception of user uplink signal best or smart antenna array preferably, then when sending user's downlink data, the base station the quality of reception of the user uplink signal of determining best or send on the smart antenna array preferably and desire to send to this user's data, therefore effectively improve the quality of data that the user receives, and reduced the load of all the other smart antenna arrays.In addition, because on having carried out in the communication process/down transmitting power control and synchronisation offset control, reduced intrasystem interference effectively and guaranteed user's uplink synchronous.
The user uplink data method of reseptance that provides corresponding to the embodiment of the invention, the embodiment of the invention also provides a kind of user uplink data processing unit, as shown in Figure 4, this device comprises: receiving element 41, channel estimating unit 42, joint-detection unit 43 and decoding unit 44; Wherein:
Receiving element 41 is used to receive the user uplink signal that each smart antenna array of being in same sub-district sends.
Joint-detection unit 43 is used to utilize channel estimating unit that the channel estimation results of each smart antenna array is carried out joint-detection respectively to the user uplink signal that each smart antenna sends.
Corresponding to user's downlink data transmission method that the embodiment of the invention provides, the embodiment of the invention also provides a kind of user's downlink data dispensing device, and as shown in Figure 5, this device comprises: downlink data sends determining unit 51 and transmitting element 52; Wherein:
Downlink data sends determining unit 51, is used to measure the quality of reception of user uplink signal on each smart antenna array, determines the smart antenna array that sends user's downlink data.
Transmitting element 52 is used for sending common down channel information to each smart antenna array, and the smart antenna array that is used for sending according to downlink data the transmission user downlink data that determining unit 51 determines sends user's downlink data.
Figure 6 shows that user's downlink data dispensing device that the embodiment of the invention provides structural representation two, this device also comprises: channel estimating unit 42 shown in Figure 4 and computing unit 61; Wherein:
Computing unit 61 is used for calculating the downlink forming vector of each smart antenna array to the user according to the channel estimation results of channel estimating unit 42;
Transmitting element 52 also is used to control each smart antenna array that sends user's downlink data and carries out wave beam forming according to the downlink forming vector that computing unit 61 provides.
Preferably, above-mentioned base station also can comprise:
Transmitting power control unit 62 is used for resolving the uplink power control order of the user uplink signal on each smart antenna array, and sends to transmitting element 42.
Transmitting element 52 also is used for controlling the transmitting power of the smart antenna array of the described transmission user downlink data of determining according to the described power control command that receives.
Preferably, above-mentioned base station also can comprise:
The access control unit 63 at random, be used for judging different smart antenna arrays and whether detect the identical uplink synchronous sequence SYNC_UL that same user sends at the uplink pilot time slot of same subframe, if detect, then send it back and to be notified to described transmitting element 52.
Transmitting element 52 also is used for according to the best corresponding smart antenna array of response notification selective reception user uplink signal quality of access unit transmission at random this user being responded.
On the user who provides corresponding to the embodiment of the invention/and downlink data transmission method, the embodiment of the invention also provides a kind of base station, comprises foregoing user uplink data processing unit.
In addition, this base station also comprises Fig. 5 or arbitrary user's downlink data dispensing device shown in Figure 6.
The corresponding user's downlink data transmission method that provides with the embodiment of the invention, the embodiment of the invention also provides a kind of distributed intelligent antenna system, the base station of using the embodiment of the invention to provide, as shown in Figure 7, this system comprises: base station and n different smart antenna array, and described smart antenna array links to each other with the base station and forms a distributed intelligent antenna sub-district, wherein:
Smart antenna array is used to transmit between base station and the user/downlink data.Wherein, the quantity n of smart antenna array is the positive integer more than or equal to 2.
Described base station can be foregoing arbitrary base station that comprises the user uplink data processing unit.
In the described distributed intelligent antenna system of present embodiment, generally speaking each smart antenna array is distributed in the diverse location in the sub-district of living in, like this, be equivalent to a bigger sub-district has been formed in a plurality of sub-districts of existing a plurality of smart antenna array correspondences, increased cell coverage area.In addition, for further improving the transmitting power and the up-downgoing receiving gain of each smart antenna array, also a plurality of smart antenna arrays in above-mentioned each sub-district can be placed in same position, the signal that a plurality of smart antenna arrays send can adopt the rake mode, can be by the base station end according to setting rule to controlling the launch time of each smart antenna array, make certain delay of staggering between launch time of per two smart antenna arrays, to improve systematic function and receiving gain.
In addition, because under the high-speed mobile situation, there are a lot of places to have the tunnel, in order to guarantee the received signal quality of user in the tunnel coverage, generally need be with making 1 sub-district with the tunnel inner region outside the tunnel, for short tunnel, can realize figuration with the miniaturized intelligent antenna array, for long tunnel, can in the tunnel, use non intelligent antenna array (as single antenna or poliarizing antenna etc.) to replace smart antenna array and be connected on the base station of this sub-district, use to realize channelizing.The method that the downlink user signaling method of the distributed intelligent antenna system of this a plurality of smart antenna array and the combination of non intelligent antenna array can adopt the embodiment of the invention to provide, just when sending user's downstream signal, need not to carry out down beam shaping for the non intelligent antenna array in the tunnel, only need to give this non intelligent antenna array to distribute power to get final product.In addition, also can adopt the rake mode to carry out the signal transmission between channelizing antenna or poliarizing antenna multipole to improve user's receiving gain.
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 (21)
1, a kind of user uplink data method of reseptance is applied to distributed intelligent antenna system, it is characterized in that, this method comprises:
More than one smart antenna array is connected with the base station of sub-district;
Each smart antenna array that belongs to same sub-district receives user uplink data respectively, and sends the user uplink signal to the base station;
Channel estimating is carried out to the up channel that each smart antenna array sends the user uplink signal in the base station;
Utilize the channel estimation results of each smart antenna array that the user uplink signal that each smart antenna sends is carried out joint-detection respectively;
The upstream data of same user after the different intelligent antenna array joint-detection is merged back decoding.
2, the method for claim 1, it is characterized in that, described upstream data with the same user after the different intelligent antenna array joint-detection merges, and comprising: the upstream data of the same user after adopting high specific merging method to described different intelligent antenna array joint-detection merges.
3, a kind of user's downlink data transmission method is applied to distributed intelligent antenna system, it is characterized in that, this method comprises:
More than one smart antenna array is connected with the base station of sub-district;
The smart antenna array that sends user's downlink data is determined according to the quality of reception of user uplink signal on each smart antenna array that is connected in the base station;
The base station sends common down channel information by described each smart antenna array that is connected, and sends user's downlink data by the smart antenna array of the described transmission user downlink data of determining;
Wherein, when the smart antenna array of the described transmission user downlink data of determining was at least two, each smart antenna array of the described transmission user downlink data of determining used identical carrier frequency, identical time slot to send user's downlink data with identical code channel.
4, method as claimed in claim 3 is characterized in that, the smart antenna array that sends user's downlink data is determined according to the quality of reception of user uplink signal on each smart antenna array that is connected in described base station, comprising:
User uplink signal receiving quality on each smart antenna array that base station measurement is connected obtains corresponding measured value;
Select a best measured value of the characterization signal quality of reception or select a plurality of preferably measured values of the characterization signal quality of reception;
The smart antenna array of the measured value correspondence selected is defined as the smart antenna array of described transmission user downlink data.
5, method as claimed in claim 4 is characterized in that, the user uplink signal receiving quality on each smart antenna array that described base station measurement is connected comprises:
The signal to noise ratio of base station measurement user uplink signal on each smart antenna array, or
The amplitude and noise ratio of base station measurement user uplink signal on each smart antenna array, or
Received signal code power on each smart antenna array of base station measurement.
6, method as claimed in claim 4, it is characterized in that, before the user uplink signal receiving quality on each smart antenna array that described base station measurement is connected, also comprise: channel estimating is carried out to the up channel that transmits the user uplink signal on each smart antenna array that is connected in the base station; And each smart antenna array that calculating is connected according to channel estimation results is to user's downlink forming vector;
Described each smart antenna array by the transmission user downlink data determined uses identical carrier frequency, identical time slot and identical code channel to send user's downlink data, and also comprise: each smart antenna array of the described transmission user downlink data of determining carries out wave beam forming according to described downlink forming vector to the user to user's downlink data.
7, method as claimed in claim 6 is characterized in that, described base station carries out the up channel that transmits the user uplink signal on each smart antenna array that is connected also comprising after the channel estimating:
The base station is measured total bandwidth power, receiving slot sign indicating number power, transmitter code power, Interference Signal Code Power, transmission gross power and the user's of each smart antenna array that is connected angular position information respectively according to described channel estimation results, and reports to radio network controller;
Radio network controller according to reporting information for the user distributes described carrier frequency, time slot and code channel.
8, the method for claim 1 is characterized in that, when sending user's downlink data, according to the uplink power control order in this user uplink signal, carries out transmitting power control on the smart antenna array of the described transmission user downlink data of determining.
9, the method for claim 1, it is characterized in that, also comprise: the uplink pilot time slot that each smart antenna array that is connected with the base station carries out the user respectively detects and reports the base station, if the base station is judged different smart antenna arrays and detect the identical uplink synchronous sequence SYNC_UL that same user sends in the uplink pilot time slot of same subframe, the best corresponding smart antenna array of selective reception user uplink signal quality is responded this user.
10, the method for claim 1 is characterized in that, when having long tunnel in the coverage cell of described base station, each the non intelligent antenna array in the long tunnel is handled as one of smart antenna array that is connected with described base station.
11, a kind of user uplink data processing unit is characterized in that, this device comprises:
Receiving element is used to receive the user uplink signal that each smart antenna array of being in same sub-district sends;
Channel estimating unit, the user uplink signal that is used for receiving according to described receiving element carries out channel estimating to the up channel that transmits the user uplink signal on each smart antenna array;
The joint-detection unit is used to utilize channel estimating unit that the channel estimation results of each smart antenna array is carried out joint-detection respectively to the user uplink signal of each smart antenna array;
Merge decoding unit, be used for the upstream data of the same user after the different intelligent antenna array joint-detection is merged back decoding.
12, a kind of user's downlink data dispensing device is characterized in that this device comprises:
Downlink data sends determining unit, is used to measure the quality of reception of user uplink signal on each smart antenna array, determines the smart antenna array that sends user's downlink data;
Transmitting element is used for sending common down channel information to each smart antenna array, and the smart antenna array that is used for sending according to downlink data the transmission user downlink data that determining unit determines sends user's downlink data.
13, user's downlink data dispensing device as claimed in claim 12 is characterized in that, also comprises:
Channel estimating unit, the user uplink signal that is used for sending according to each smart antenna array carries out channel estimating to the up channel that transmits the user uplink signal on each smart antenna array;
Computing unit is used for calculating the downlink forming vector of each smart antenna array to the user according to the channel estimation results of described channel estimating unit;
Described transmitting element also is used to control each smart antenna array that sends user's downlink data and carries out wave beam forming according to the downlink forming vector that described computing unit provides.
14, user's downlink data dispensing device as claimed in claim 13 is characterized in that, also comprises:
The transmitting power control unit is used for resolving the uplink power control order of the user uplink signal on each smart antenna array, and sends to described transmitting element;
Described transmitting element also is used for controlling the transmitting power of the smart antenna array of the described transmission user downlink data of determining according to the described power control command that receives.
15, user's downlink data dispensing device as claimed in claim 14 is characterized in that, also comprises:
The access control unit is used for judging different smart antenna arrays and whether detects the identical uplink synchronous sequence SYNC_UL that same user sends at the uplink pilot time slot of same subframe at random, if detect, then sends it back and should be notified to described transmitting element;
Described transmitting element also is used for according to the best corresponding smart antenna array of described response notification selective reception user uplink signal quality this user being responded.
16, a kind of base station is characterized in that, comprises the described user uplink data processing unit of claim 11.
17, base station as claimed in claim 16 is characterized in that, also comprises the described arbitrary user's downlink data dispensing device of claim 12-15.
18, a kind of distributed intelligent antenna system is characterized in that, comprises more than one smart antenna array, also comprises the described base station of claim 16 or claim 17, and described each smart antenna array links to each other with described base station; Wherein, each smart antenna array is used to transmit between base station and the user/downlink data.
19, system as claimed in claim 18 is characterized in that, described each smart antenna array is arranged at the different location in this base station coverage cell; Perhaps, described each smart antenna array is concentrated the same place that is arranged in this base station coverage cell.
20, system as claimed in claim 19 is characterized in that, when comprising long tunnel in the coverage cell of described base station, this system also comprises the non intelligent antenna array that is arranged in the described long tunnel, and described non intelligent antenna array is connected with described base station.
21, system as claimed in claim 19, it is characterized in that, when the base station sends user's downlink data, the common channel information that described each smart antenna array of concentrating the same place that is arranged in this base station coverage cell sends or the user's downlink data regular hour skew chip that staggers.
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| CN2007101215994A CN101388701B (en) | 2007-09-10 | 2007-09-10 | Customer data receiving/transmitting method, apparatus and distributed intelligent antenna system |
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