CN101388701B - 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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- CN101388701B CN101388701B CN2007101215994A CN200710121599A CN101388701B CN 101388701 B CN101388701 B CN 101388701B CN 2007101215994 A CN2007101215994 A CN 2007101215994A CN 200710121599 A CN200710121599 A CN 200710121599A CN 101388701 B CN101388701 B CN 101388701B
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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 district reselecting all very short and leave the user for; When therefore the user of high-speed mobile moves in different sub-districts at short notice, easy 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 at present is to adopt optical fiber repeater or wireless discharging-directly station, 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 disclosed scheme of this patent, a plurality of smart antenna arrays are connected on a plurality of RF transceivers of same base station through 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, also do not cover the concrete realization system and the corresponding signal process scheme of beneficial scope at present for enlarging the sub-district.
Summary of the invention
The present invention provides a kind of customer data receiving/transmitting method and realizes the device and the distributed intelligent antenna system of said method, in order to solve the too small problem of cell coverage area in the prior art.
The present invention provides a kind of customer data receiving/transmitting method, is applied to distributed intelligent antenna system, and this method comprises: user uplink data method of reseptance and user's downlink data transmission method;
Said user uplink data method of reseptance specifically 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 and give 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; Same user's after the different intelligent antenna array joint-detection upstream data is merged back decoding;
Said user's downlink data transmission method specifically comprises:
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; Common down channel information is sent through said each smart antenna array that is connected in the base station, and sends user's downlink data through the smart antenna array of the said transmission user downlink data of determining; Wherein, When the smart antenna array of the said transmission user downlink data of determining was at least two, each smart antenna array of the said transmission user downlink data of determining used identical carrier frequency, identical time slot to send user's downlink data with identical code channel.
Said upstream data with the same user after the different intelligent antenna array joint-detection merges, and comprising: the same user's after adopting high specific merging method to said different intelligent antenna array joint-detection upstream data 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; Common down channel information is sent through said each smart antenna array that is connected in the base station, and the smart antenna array user downlink data through the said transmission user downlink data of determining; Wherein, When the smart antenna array of the said transmission user downlink data of determining was at least two, each smart antenna array of the said transmission user downlink data of determining used identical carrier frequency, identical time slot to send user's downlink data with identical code channel.
Said 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 that the measured value of selecting is corresponding is confirmed as the smart antenna array of said transmission user downlink data.
User uplink signal receiving quality on each smart antenna array that said 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 said 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;
Said each smart antenna array through 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 said transmission user downlink data of determining carries out wave beam forming according to said downlink forming vector to the user to user's downlink data.
Said 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 said channel estimation results, and reports to radio network controller; Radio network controller according to reporting information for the user distributes said 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 said transmission user downlink data of determining, carry out transmitting power control also according to the order of the uplink power control 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; In the uplink pilot time slot of same subframe, detect the identical uplink synchronous sequence SYNC_UL that same user sends if base station judges goes out different smart antenna arrays, 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 said base station, each the non intelligent antenna array in the long tunnel is handled as one of smart antenna array that is connected with said base station.
The present invention also provides a kind of user's downlink data dispensing device, and this device comprises:
Downlink data sends confirms the 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 transmission user downlink data that is used for sending according to downlink data the transmission user downlink data of confirming that the unit is determined;
Wherein, When the smart antenna array that sends the transmission user downlink data of confirming that the unit is determined when said downlink data was at least two, each smart antenna array of the said transmission user downlink data of determining used identical carrier frequency, identical time slot and identical code channel to send user's downlink data.
Preferably, said 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 said channel estimating unit; Said 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 said 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 said transmitting element; Said transmitting element also is used for controlling the transmitting power of the smart antenna array of the said transmission user downlink data of determining according to the said 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 response notification and give said transmitting element; Said transmitting element also is used for according to the best corresponding smart antenna array of said response notification selective reception user uplink signal quality this user being responded.
To sum up visible, scheme provided by the invention can be brought following beneficial effect:
Distributed intelligent antenna system provided by the invention is through being connected to same base station with a plurality of smart antenna arrays; Effectively enlarge former base station cell covered scope, 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, has effectively improved the quality of the downlink data of user's reception, and has 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.
The user uplink data method of reseptance journey figure that provides for the embodiment of the invention shown in Figure 1, 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 and give 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 pass through the upstream data that up channel receives user's transmission, 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 and disturb; 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 same user's after the different intelligent antenna array joint-detection upstream data 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 possibly all arranged of C, then base station this user's that smart antenna array A, B, C is last joint detection results adopts the maximum ratio method that merges to merge 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; So 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 SNR).
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 detail at this.
The user's downlink data transmission method key step flow chart that provides for the embodiment of the invention shown in Figure 2 comprises:
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: send common down channel information the base station through each smart antenna array that is connected, and send user's downlink data through the smart antenna array of the said 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 through 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 is sent user's downlink data through the smart antenna array of the said transmission user downlink data of determining.For example: can be with Common Control Physical Channel (Primary Common Control Physical Channel; PCCPCH), PCH (Paging Channel; 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 the user's who determines SNR of upward signal maximum 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.
Two of the flow chart of steps of the user's downlink data transmission method that provides for the embodiment of the invention shown in Figure 3, 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 smart antenna array that several measured values are corresponding preferably to confirm as the smart antenna array of said 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 that SNR is a maximum smart antenna array is as the smart antenna array that sends user's downlink data; Perhaps with the descending arrangement of SNR value, the smart antenna array that several SNR values before 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 as the maximum smart antenna array of the SNR that determines.
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 according to these measured values select user uplink signal receiving qualities preferably with smart antenna array preferably.
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: common down channel information is sent through said each smart antenna array that is connected in the base station, and sends user's downlink data through the smart antenna array of the said 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 base station also according to channel estimation results measure each smart antenna total bandwidth power, receiving slot sign indicating number power, user uplink signal SNR, transmitter code power, Interference Signal Code Power and send gross power; And report to RNC according to these transmission gross powers of measuring SNR, transmitter code power, Interference Signal Code Power and this smart antenna array of a total bandwidth power that item will receive the strongest smart antenna array of signal, receiving slot sign indicating number power, user uplink signal; So that (Radio Resource Management carries out resource allocation (for the user of each sub-district distributes time slot, code channel and frequency resource) according to above-mentioned measurement item in the time of RRM) to RRM.Wherein, the base station also can report to RNC with all smart antenna array Interference Signal Code Powers and the average power of sending gross power; Perhaps, the base station also can all report to RNC with each item 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 (Regenerative Repeater Unit, RRU) numbering and should numbering corresponding AOA information reporting be to RNC, so the RNC geographical position that can determine this user according to the RRU numbering that receives and corresponding AOA information in the regenerative repeating unit that this user is corresponding.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) the inner interference level of restriction system effectively reduces 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 carry out down transmitting power control, when promptly sending user's downlink data; According to the order of the uplink power control in this user uplink signal, on the smart antenna array of the said 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 that the different intelligent antenna array is consistent to the descending TPC control command that same user sends so that corresponding user receive behind the signal of each smart antenna array can this TPC order of right demodulation and make the corresponding transmission power adjustment.
Similarly, when carrying out down transmitting power control, the base station is also sent simultaneous bias (SS) order through each smart antenna array to respective user, and the user guarantees that according to this SS order carrying out timing adjustment 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 to; 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 confirm 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 (Uplink Pilot 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, and promptly the base station sends the TPC/SS order for this user through 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; Through 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 improved 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 confirms unit 51 and transmitting element 52; Wherein:
Downlink data sends confirms 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 transmission user downlink data that is used for sending according to downlink data the transmission user downlink data of confirming that unit 51 is determined.
Two of the structural representation of the user's downlink data dispensing device that provides for the embodiment of the invention shown in Figure 6, this device also comprises: channel estimating unit 42 shown in Figure 4 and computing unit 61; Wherein:
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 said transmission user downlink data of determining according to the said 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 response notification and give said 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 said 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.
Said 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 the corresponding a plurality of sub-districts of existing a plurality of smart antenna arrays, increased cell coverage area.In addition; For further improving the transmitting power and the up-downgoing receiving gain of each smart antenna array; Also can a plurality of smart antenna arrays in above-mentioned each sub-district be placed in same position, the signal that a plurality of smart antenna arrays send can adopt the rake mode, can be through 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, owing under the high-speed mobile situation, have a lot of places to have the tunnel; In order to guarantee user's in the tunnel coverage received signal quality, generally need be with making 1 sub-district with the tunnel inner region outside the tunnel, for short tunnel; Can use the miniaturized intelligent antenna array to realize figuration; For long tunnel, can in the tunnel, use non intelligent antenna array (like 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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1. a customer data receiving/transmitting method is applied to distributed intelligent antenna system, it is characterized in that, this method comprises: user uplink data method of reseptance and user's downlink data transmission method;
Said user uplink data method of reseptance specifically 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 and give 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;
Same user's after the different intelligent antenna array joint-detection upstream data is merged back decoding;
Said user's downlink data transmission method specifically comprises:
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;
Common down channel information is sent through said each smart antenna array that is connected in the base station, and sends user's downlink data through the smart antenna array of the said transmission user downlink data of determining;
Wherein, When the smart antenna array of the said transmission user downlink data of determining was at least two, each smart antenna array of the said transmission user downlink data of determining used identical carrier frequency, identical time slot to send user's downlink data with identical code channel.
2. the method for claim 1; It is characterized in that; Said upstream data with the same user after the different intelligent antenna array joint-detection merges, and comprising: the same user's after adopting high specific merging method to said different intelligent antenna array joint-detection upstream data merges.
3. 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;
Common down channel information is sent through said each smart antenna array that is connected in the base station, and sends user's downlink data through the smart antenna array of the said transmission user downlink data of determining;
Wherein, When the smart antenna array of the said transmission user downlink data of determining was at least two, each smart antenna array of the said 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 said 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 that the measured value of selecting is corresponding is confirmed as the smart antenna array of said 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 said 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 said 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;
Said each smart antenna array through 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 said transmission user downlink data of determining carries out wave beam forming according to said downlink forming vector to the user to user's downlink data.
7. method as claimed in claim 6 is characterized in that, said 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 said channel estimation results, and reports to radio network controller;
Radio network controller according to reporting information for the user distributes said carrier frequency, time slot and code channel.
8. method as claimed in claim 3 is characterized in that, when sending user's downlink data, according to the order of the uplink power control in this user uplink signal, on the smart antenna array of the said transmission user downlink data of determining, carries out transmitting power control.
9. method as claimed in claim 3; 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; In the uplink pilot time slot of same subframe, detect the identical uplink synchronous sequence SYNC_UL that same user sends if base station judges goes out different smart antenna arrays, the best corresponding smart antenna array of selective reception user uplink signal quality is responded this user.
10. method as claimed in claim 3 is characterized in that, when having long tunnel in the coverage cell of said base station, each the non intelligent antenna array in the long tunnel is handled as one of smart antenna array that is connected with said base station.
11. user's downlink data dispensing device is characterized in that this device comprises:
Downlink data sends confirms the 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 transmission user downlink data that is used for sending according to downlink data the transmission user downlink data of confirming that the unit is determined;
Wherein, When the smart antenna array that sends the transmission user downlink data of confirming that the unit is determined when said downlink data was at least two, each smart antenna array of the said transmission user downlink data of determining used identical carrier frequency, identical time slot and identical code channel to send user's downlink data.
12. user's downlink data dispensing device as claimed in claim 11 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 said channel estimating unit;
Said 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 said computing unit provides.
13. user's downlink data dispensing device as claimed in claim 12 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 said transmitting element;
Said transmitting element also is used for controlling the transmitting power of the smart antenna array of the said transmission user downlink data of determining according to the said power control command that receives.
14. user's downlink data dispensing device as claimed in claim 13 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 response notification and gives said transmitting element;
Said transmitting element also is used for according to the best corresponding smart antenna array of said response notification selective reception user uplink signal quality this user being responded.
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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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| CN2007101215994A CN101388701B (en) | 2007-09-10 | 2007-09-10 | Customer data receiving/transmitting method, apparatus and distributed intelligent antenna system |
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| CN101388701B true CN101388701B (en) | 2012-11-07 |
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| CN101938303A (en) * | 2009-06-30 | 2011-01-05 | 中兴通讯股份有限公司 | Antenna array and method for transmitting signal of antenna array |
| US8891438B2 (en) | 2010-09-08 | 2014-11-18 | Intel Corporation | Packet-data network and methods for RAN-agnostic multimedia content distribution |
| WO2013040089A2 (en) * | 2011-09-14 | 2013-03-21 | Rearden, Llc | Systems and methods to exploit areas of coherence in wireless systems |
| CN102946615A (en) * | 2012-11-14 | 2013-02-27 | 北京奇天揽胜科技有限公司 | System and method used for improving MIMO (multiple input multiple output) system communication situation |
| CN103152816B (en) * | 2013-03-18 | 2015-07-15 | 深圳大学 | Distributed beam forming system and carrier synchronization method of transmitting antennas at source end of distributed beam forming system |
| CN104581962B (en) * | 2013-10-22 | 2018-08-17 | 华为技术有限公司 | A kind of method and apparatus of link circuit self-adapting |
| CN103825627B (en) * | 2013-12-10 | 2015-07-29 | 大唐移动通信设备有限公司 | A kind of associated detecting method and base station |
| CN104158572B (en) * | 2014-06-27 | 2017-10-13 | 河海大学 | A kind of green distributing antenna system communication means based on smart antenna |
| CN106209180B (en) * | 2015-04-30 | 2020-06-02 | 中兴通讯股份有限公司 | Downlink antenna selection method and device of distributed base station |
| CN108366377A (en) * | 2017-01-26 | 2018-08-03 | 索尼公司 | Electronic equipment, communication means and medium |
| CN108632979B (en) * | 2017-03-20 | 2022-04-05 | 中兴通讯股份有限公司 | Method, device and equipment for optimizing time synchronization error |
| US11206566B2 (en) | 2017-08-09 | 2021-12-21 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for downlink signal transmission, terminal device and network device |
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