CN101621848B - Signal transmission method, base station and communication system - Google Patents
Signal transmission method, base station and communication system Download PDFInfo
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- CN101621848B CN101621848B CN200810040182XA CN200810040182A CN101621848B CN 101621848 B CN101621848 B CN 101621848B CN 200810040182X A CN200810040182X A CN 200810040182XA CN 200810040182 A CN200810040182 A CN 200810040182A CN 101621848 B CN101621848 B CN 101621848B
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Abstract
The invention relates to the technical field of communication, and discloses a signal transmission method, a base station and a communication system. The method comprises the following steps: acquiring information that a first terminal is positioned on the edge of a cell; determining system resources and first pilot information of data signals sent by the first terminal; sending the information of the system resources and the first pilot information to the first terminal; receiving data signals sent by at least two terminals including the first terminal on the system resources, wherein pilot frequencies of the data signals sent by the at least two terminals are orthogonal, and the pilot frequency of a first data signal sent by the first terminal corresponds to the first pilot information; and according to the pilot frequencies of the data signals sent by the at least two terminals, detecting the first data signal sent by the first terminal from the received data signals. The technical scheme can improve service quality not by improving the transmitted power of the terminals.
Description
Technical field
The present invention relates to communication technical field, be specifically related to method for transmitting signals, base station and communication system.
Background technology
Along with the develop rapidly of mobile communication technology, use the people of mobile communication also more and more.But, has relatively poor performance usually because the limitation of mobile communication is positioned at the user of cell edge owing to receive the influence of actual channel environment and neighbor cell.Be in particular in; On up direction; Because terminal (MS:Mobile Station) is far away apart from central area, base station (BS:Base Station); Receive the influence of shadow fading and adjacent area interference or the like factor, compare the ratio (SINR:Signal-to-Interference and Noise Ratio) that distance center zone user has relatively poor signal and interference and noise, caused the increase of base station mistake receiving terminal signal probability.
In order to solve the problem of up direction signal difference; Existing a kind of method for transmitting signals that is used for the performance of reinforced cell edge customer is such: when the base station receives the signal that sends from the terminal of edge cell when being lower than the thresholding of correct decoding; Control signaling terminal through the down link direction promotes transmitting power according to certain principle, thereby makes the terminal reach the SINR of correct decoding.
In realizing process of the present invention; The inventor finds that there is following defective at least in such scheme: technique scheme is improved this quality of services for users through the mode that improves terminal transmit power; But the raising of power can influence other quality of services for users; Simultaneously, the power resources at terminal is limited, and the transmitting power that therefore improves the terminal can cause the waste of the valuable power resources at terminal.
Summary of the invention
The embodiment of the invention provides method for transmitting signals, base station and communication system, can not improve service quality through the transmitting power that improves the terminal.
The purpose of the embodiment of the invention realizes through following technical scheme:
The embodiment of the invention provides a kind of method for transmitting signals, comprising:
Obtain the information that first terminal is in cell edge;
Confirm the system resource and first pilot frequency information of said first terminal transmission data-signal;
The information and said first pilot frequency information of said system resource are sent to said first terminal;
On said system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone that send at said first terminal is corresponding with said first pilot frequency information;
The pilot tone of the data-signal that sends according to said at least two terminals detects first data-signal that send at said first terminal from the data-signal that receives.
The embodiment of the invention also provides a kind of base station, comprising:
Acquiring unit is used to obtain the information that first terminal is in cell edge;
Confirm the unit, be used for obtaining after said first terminal is in the information of cell edge, confirm that said first terminal sends the system resource and first pilot frequency information of data-signal at said acquiring unit;
Transmitting element, the information and said first pilot frequency information that are used for the said system resource that said definite unit is definite send to said first terminal;
Receiving element; Receive the data-signal of at least two terminals transmissions that comprise said first terminal on the said system resource that is used for confirming in said definite unit; The pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone of first data-signal that send at said first terminal is corresponding with said first pilot frequency information;
Detecting unit is used for the pilot tone according to the data-signal of said at least two terminals transmission, from the data-signal that said receiving element receives, detects first data-signal that send at said first terminal.
The embodiment of the invention also provides a kind of communication system, comprises first base station, but said first base station link to each other with communication mode with the terminal, wherein:
Said first base station is used to obtain the information that first terminal is in cell edge, confirms the system resource and first pilot frequency information of said first terminal transmission data-signal; The information and said first pilot frequency information of said system resource are sent to said first terminal; On said system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone that send at said first terminal is corresponding with said first pilot frequency information; Be used for pilot tone, from the said data-signal that receives, detect first data-signal that send at said first terminal according to the data-signal of said at least two terminals transmission.
Can find out from the above technical scheme that the embodiment of the invention provides; Because the embodiment of the invention can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Owing to be that at least two terminals are at same system transmitted over resources data-signal; Thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes the terminal obtain good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of method for transmitting signals embodiment one in the embodiment of the invention;
Fig. 2 is the sketch map of transmission parameter in the embodiment of the invention;
Fig. 3 is the flow chart of method for transmitting signals embodiment two in the embodiment of the invention;
Fig. 4 is the structure chart of base station embodiment one in the embodiment of the invention;
Fig. 5 is the structure chart of base station embodiment two in the embodiment of the invention;
Fig. 6 is the structure chart of communication system embodiment two in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Introduce the method for transmitting signals that the embodiment of the invention provides earlier, Fig. 1 has described the flow process of method for transmitting signals embodiment one, comprising:
In the embodiment of the invention; The first corresponding base station of the sub-district of first terminal attaching can initiatively obtain the information that first terminal is in cell edge; The power of the response message that for example can send according to first terminal judges whether first terminal is in cell edge; Particularly, can the predetermined threshold value, if the power of response message is less than this threshold value then think that first terminal is in cell edge.The base station also can confirm whether first terminal is in cell edge through receiving the signaling information that sends at first terminal passively, and this signaling information is detected by first terminal and sends when self is in cell edge; The corresponding base station, sub-district of supposing first terminal attaching is first base station; With the corresponding base station of neighbor cell of the sub-district of first terminal attaching is second base station; First terminal can be estimated the SINR from first base station and second base station respectively through the pilot signal or the training sequence of down channel; If the SINR that first terminal records from the signal of the sub-district of ownership and its neighbor cell differs less; Like the difference of two SINR thresholding system less than a setting, then first terminal can be confirmed self to be in cell edge, can notify first base station with the information that first terminal is in cell edge through up signaling information.
Step 102, confirm that first terminal sends the system resource and first pilot frequency information of data-signal;
Particularly; First base station can coordinate to confirm the system resource of said first terminal transmission data-signal with the base station of neighbor cell; Universal time coordinated is carried out in the base station of first base station and neighbor cell, the terminal scheduling that is in cell edge in first terminal and the neighbor cell is transmitted on same system resource, wherein; The quantity of neighbor cell is at least one, and signal can be sent in the terminal that is scheduled on the same system resource on this system resource; System resource can be time resource, frequency resource etc.Because user's data in this sub-district of demodulation is not only wanted in first base station; But also to eliminate/suppress the interference of neighbor cell edge customer even the user's data at demodulation neighbor cell edge; Therefore can be distinguished for fear of the data between the terminal of same system transmitted over resources signal; Be scheduled for the pilot tone quadrature that adopt at the terminal of same system resource, wherein the quadrature of pilot tone can be a yard quadrature, frequency orthogonal, time quadrature etc.; Wherein, Concrete which kind of pilot tone that adopts also can be coordinated to confirm by first base station with the base station of neighbor cell; Perhaps also can make an appointment with the base station of neighbor cell in first base station, then only need from the pilot frequency information of preserving in advance, confirm the pilot frequency information of first terminal transmission data this moment.
Wherein, Guarantee orthogonality between the just interdigital spreading code that in code division multiple access (CDMA:Code Division Multiple Access) system or WCDMA (WCDMA:Wideband Code Division Multiple Access) system, adopts of sign indicating number; With two terminals is example; Be assumed to be first terminal and second terminal, then first terminal and second terminal adopt the channel code of quadrature to transmit the pilot signal at two terminals respectively.For example, the frequency expansion sequence of [1111] can be adopted in first terminal, and second terminal can be adopted and sequence [11-1-1] or [1-11-1] or [1-1-11] of [1111] quadrature.The frequency expansion sequence that a kind of pilot tone that the embodiment of the invention provides adopts is as shown in table 1:
Table 1
| The frequency expansion sequence pattern that pilot tone adopts | Sequence index |
| [1?1?1?1] | 0 |
| [1?1-1-1] | 1 |
| [1-1?1-1] | 2 |
| [1-1-1?1] | 3 |
If pilot tone adopt the sign indicating number quadrature mode, a plurality of users' pilot tone can be transmitted through being placed on the same resource after the spread spectrum.When adopting the sign indicating number quadrature, first base station need send to first terminal with corresponding pilot frequency sequence pattern, perhaps also can the sequence index of pilot frequency sequence pattern be sent to first terminal.
Frequency orthogonal or time quadrature refer to promptly place the time of a terminal pilot tone and/or the pilot tone that other-end is not placed at the frequency resource place at frequency and/or pilot tone quadrature on the time, remove the corresponding data-signal of the shared resource of each terminal pilot tone through punching usually.For example; A Resource Block (RU:Resource Unit) has M number of sub-carrier and N orthogonal frequency division multiplexing multiple access to insert (OFDMA:OrthogonalFrequency-Division Multiple Access) symbol formation, and the embodiment of the invention does not limit the concrete numerical value of M and N.When frequency of utilization quadrature or time quadrature, the position of pilot sub-carrier is placed at first terminal, and the correspondence position on the resource at second terminal is the gap carrier wave, does not let alone what data.In like manner, place the position of pilot sub-carrier at second terminal, the correspondence position on the resource at first terminal is the gap carrier wave.Wherein, When adopting time quadrature or frequency orthogonal pilots design; First base station and second base station need be notified first terminal and its pilot tone pattern of second terminal respectively, and first base station or second base station all will keep the pilot tone drawing information at first terminal and second terminal simultaneously.
Step 103, the information and first pilot frequency information of system resource sent to first terminal;
After having confirmed system resource and pilot frequency information, need the information and first pilot frequency information of system resource be sent to first terminal; Wherein, the information of system resource can comprise the type and the position of system resource, and type can be time resource and/or frequency resource etc.Wherein, the information of system resource and first pilot frequency information can be placed on and send to first terminal in the assignation information simultaneously, also can be placed on and send to first terminal in the different information respectively.
Step 104, on system resource, receive the data-signal that send at least two terminals comprising first terminal; The pilot tone quadrature of the data-signal of at least two terminal transmissions, the pilot tone of first data-signal that send at first terminal is corresponding with first pilot frequency information;
First terminal is behind the information that receives system resource and first pilot frequency information; Just can be according to the first pilot frequency information design data signal; Make the pilot tone of data-signal corresponding, and then data-signal is transmitted on the corresponding system resource of the information of system resource with first pilot frequency information; Because; The information of system resource is to be coordinated to confirm by second base station of first base station and at least one neighbor cell; Therefore have comprise first terminal at least two terminals at this system resource transmitting data signal, and the pilot tone quadrature of the data-signal that sends of these at least two terminals.
The pilot tone of the data-signal that send at step 105, at least two terminals of basis detects first data-signal that send at first terminal from the data-signal that receives.
Particularly, the pilot tone of the data-signal that can send according at least two terminals confirms that at least two terminals send the channel response parameter of data, and then uses according to the channel response parameter and to receive Processing Algorithm and calculate first data-signal.Wherein receiving Processing Algorithm can be interference cancellation techniques (comprising does something in disregard of obstacles disturbs technology for eliminating and soft interference cancellation techniques), least mean-square error (L-MMSE:Linear MinimumMean-Squared Error), urgent zero (ZF:Zero-Forcing), Maximum Likelihood Detection (MLD:MaximumLikelihood Detection) etc.Suppose 2 reception antennas of first base station, corresponding transmission parameter sketch map is as shown in Figure 2, and the data-signal that send at first terminal is S
A, its channel response parameter to first antenna is h
11, be h to the channel response parameter of second antenna
12The data-signal that send at second terminal is S
B, its channel response parameter to first antenna is h
21, be h to the channel response parameter of second antenna
22Then the data-signal that sends from second terminal in first terminal of this sub-district and the neighbor cell that receives of first base station can be represented like 1.1 formulas:
Wherein, in conjunction with existing noise theoretical model, suppose n
1, n
2For average is 0 Gaussian noise, and
E{
*Expression
*Mathematical expectation,
Represent noise power; h
I1And h
I2Represent first terminal and second terminal respectively to the channel response parameter between i the reception antenna of first base station, this parameter obtains through pilot tone or training sequence.Disturb the technology for eliminating explanation as follows to do something in disregard of obstacles:
Receive the data-signal at two terminals when first base station after, at first demodulate the data-signal at the higher terminal of SINR, afterwards, reject the data-signal at the stronger terminal of said SINR, thereby obtain the more weak data-signal of SINR.Specific as follows: because first terminal is positioned at the Serving cell of first base station, distance first base station is nearer, so the SINR of the data-signal at first terminal is higher; And second terminal is positioned at the adjacent area, owing to receive Effect of Environmental such as shadow fading, causing the data-signal at second terminal to arrive first base station has lower SINR.So first base station at first demodulates the data-signal S of the transmission at first terminal
A, can solve the data-signal S of the transmission at second terminal then
B
The 1st formula according to (1.1): r
1=h
11S
A+ h
12S
B+ n
1, obtain the data-signal that send at first terminal
, like (1.2) formula:
Because disturb and The noise,
With S
AAnd it is incomplete same;
Further, disturb technology for eliminating through doing something in disregard of obstacles promptly
Obtain the data-signal that send at second terminal
In like manner; According to the 2nd formula of (1.1), also can calculate signal estimated value
and
at first terminal and second terminal.
Merge above-mentioned signal estimated value
and
that calculates for twice respectively; Further afterwards demodulating and decoding; Just can obtain first data-signal that send at first terminal; Can certainly obtain second data-signal that send at second terminal simultaneously; But the embodiment of the invention does not limit and must solve second data-signal, can whether solve second data-signal according to concrete needs and environmental selection.If detect second data-signal, can detected second data-signal be sent to the second corresponding base station of second terminal.
From the above; Present embodiment can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Since be at least two terminals at same system transmitted over resources data-signal, thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes terminal acquisition good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal.
The embodiment of the invention also provides method for transmitting signals embodiment two; First base station can receive the data-signal that send at first terminal that second base station solves among this embodiment; Thereby the data-signal that send at first terminal that first base station can be solved according to second base station confirmed the estimated signal of the data-signal that send at first terminal, and the primary signal that the estimated signal of final acquisition can be as much as possible sent with first terminal is identical; Fig. 3 has described the flow process of method for transmitting signals embodiment two, comprising:
This step is carried out with reference to step 101;
This step is carried out with reference to step 102;
This step is carried out with reference to step 103;
Step 304, on system resource, receive the data-signal that send at least two terminals comprising first terminal; The pilot tone quadrature of the data-signal of at least two terminal transmissions, the pilot tone of first data-signal that send at first terminal is corresponding with first pilot frequency information;
This step is carried out with reference to step 104;
The pilot tone of the data-signal that send at step 305, at least two terminals of basis detects first data-signal that send at first terminal from the data-signal that receives;
This step can be carried out with reference to step 105; Also can adopt least mean-square error or compel reception Processing Algorithm realizations such as zero; Be that least mean-square error or urgent zero is described to receive Processing Algorithm as follows:
Can obtain (1.3) formula according to (1.1) formula:
Estimate of the signal after equalization
and
is expressed as (1.4) formula:
Wherein, W representes balanced matrix: if adopt least mean-square error equalization algorithm, then W=[H
HH+ σ
2I
2 * 2]
-1H
HIf adopt the zero forcing equalization algorithm, then W=[H
HH]
-1H
HWherein, (
*)
HRepresent matrix
*Associate matrix, [
*]
-1Represent matrix
*Inverse matrix, I
2 * 2Expression 2X2 unit matrix, σ
2The expression noise power.
The data-signal that send at step 306, detected first terminal, reception second base station;
Wherein to detect the process of data-signal of first terminal transmission similar second base station process that detects the data-signal that sends at first terminal and first base station, repeats no more here;
Step 307, merge the data-signal that send at detected first terminal of first data-signal and other base stations, obtain the estimated signal of the data-signal that sends at first terminal.
The mode that wherein merges can be equal gain combining, and the data-signal that receives is directly superposeed, and makes its energy be enhanced, to strengthen receptivity; Also can be that high specific merges, be weight with SINR with the data-signal that receives, weighted sum; Also can be that selectivity merges, SINR data-signal bigger or correct decoding in the selective reception signal; Certainly, the embodiment of the invention does not limit and only can adopt above-mentioned merging mode to merge.Owing to disturb and The noise, detected data-signal can't be in full accord with the primary signal that send at first terminal, but the primary signal that the estimated signal of the data-signal that merging obtains is more sent near first terminal.
From the above; Present embodiment can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Since be at least two terminals at same system transmitted over resources data-signal, thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes terminal acquisition good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal; Further; Present embodiment can also receive the data-signal that send at detected first terminal, other base stations; And then can data-signal and self detected first data-signal that send at detected first terminal, other base stations be merged; Obtain more estimated signal, precision that can the operation of raising system near primary signal.
The embodiment three of the method for transmitting signals that the embodiment of the invention is provided from the angle at base station and terminal as follows describes, and comprising:
When the base station through certain mode (as through user feedback to base station etc.) know have two users to lay respectively at cell edge.Wherein a kind of execution mode is following: for example; First terminal in first sub-district; Pilot signal or training sequence through down channel are estimated the SINR from first base station and second base station respectively; The SINR that records from the signal of this first sub-district and adjacent second sub-district differs less, like the difference of two SINR thresholding system less than a setting.Then first terminal can it be in cell edge through up signaling first base station, same method, second terminal of second sub-district with identical method notify second base station its be in cell edge;
First base station of first sub-district and second base station of second sub-district, after mutual coordination, with first terminal and second terminal scheduling at the same time/transmit on the frequency resource.Specific practice is that a signaling information is sent to first terminal that is in cell edge and second terminal respectively in first base station and second base station, notifies the particular location of first terminal and second terminal transmission signals on time/frequency resource;
The another one content that coordinate each other first base station and second base station is the relevant information that pilot tone is adopted at the terminal.Because Serving cell is not only wanted user's data in this sub-district of demodulation, but also will eliminate/suppress the interference of neighbor cell edge customer even the user's data at demodulation neighbor cell edge.So, be scheduled for the orthogonal guide frequency that the user adopted of same time/frequency resource.Simultaneously, first base station and second base station are notified the relevant information of the pilot tone pattern at first terminal and second terminal respectively through Downlink Control Information, and this information can also can be made an appointment certainly;
First terminal and second terminal receive the assignation information from first base station and second base station respectively; Wherein, the assignation information of first terminal reception can comprise: information such as the position of first terminal transmission resource that data-signal uses, length; The pilot frequency information that adopt at first terminal; The assignation information that second terminal receives can comprise: information such as the position of second terminal transmission resource that data are used, length, the pilot frequency information that adopt at second terminal;
Data are sent according to the assignation information that receives in first terminal and second terminal;
Two base stations receive respectively from the user of this sub-district with from the user of neighbor cell, estimate the channel response parameter according to pilot tone, can use to receive Processing Algorithm and detect the signal that receives, and do further operation afterwards, like operations such as demodulation, decodings.Specifically; For first base station; It receives first data-signal that sends from first terminal of this sub-district and second data-signal that sends from second terminal of neighbor cell; First base station estimates first terminal and second terminal channel response parameter to first base station respectively according to receiving pilot frequency information in the signal, uses according to the channel response parameter that estimates to receive Processing Algorithm and detect first data-signal and second data-signal; In like manner, second base station also can detect first data-signal and second data-signal.Need to prove that the above-mentioned signal that solves neighbor cell to this area interference is to disturb under the stronger condition in the adjacent area to carry out.If adjacent area user's interference is not strong, promptly the interfering energy of adjacent area is not strong, for first base station, only needs detection signal first data-signal to get final product, if detect second data-signal certainly, then can second data-signal be sent to second base station.In like manner, for second base station, also can only detect signal second data-signal and get final product, same, if second base station detects first data-signal, also can first data-signal be sent to first base station.
The embodiment of the invention also provides the base station, and Fig. 4 has described the structure of base station, comprising:
Acquiring unit 401 is used to obtain the information that first terminal is in cell edge;
Transmitting element 403 is used for the information and first pilot frequency information of confirming the system resource that unit 402 is confirmed are sent to first terminal;
Receiving element 404; Be used at the data-signal of confirming to receive on the system resource that unit 402 is confirmed at least two terminals transmissions that comprise first terminal; The pilot tone quadrature of the data-signal of at least two terminal transmissions, the pilot tone of first data-signal that send at first terminal is corresponding with first pilot frequency information;
Detecting unit 405 is used for the pilot tone according to the data-signal of at least two terminals transmissions, from the data-signal that receiving element 404 receives, detects first data-signal that send at first terminal.
From the above; The present embodiment of base station can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Since be at least two terminals at same system transmitted over resources data-signal, thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes terminal acquisition good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal.
Further, the pilot tone of the data-signal that send at least two terminals of detecting unit 405 all right bases detects the data-signal that the other-end except that first terminal sends at least two terminals from the data-signal that receives; This moment, transmitting element 403 can also be used to send the data-signal that detecting unit 405 detected other-ends send.
The embodiment of the invention also provides the embodiment two of base station, and Fig. 5 has described the structure of the embodiment two of base station, comprising:
Acquiring unit 501 is used to obtain the information that first terminal is in cell edge;
Transmitting element 503 is used for the information and first pilot frequency information of confirming the system resource that unit 502 is confirmed are sent to first terminal; Send the data-signal that the other-end except that first terminal sends in detecting unit 505 detected at least two terminals;
Receiving element 504; Be used at the data-signal of confirming to receive on the system resource that unit 502 is confirmed at least two terminals transmissions that comprise first terminal; The pilot tone quadrature of the data-signal of at least two terminal transmissions, the pilot tone of first data-signal that send at first terminal is corresponding with first pilot frequency information; Receive the data-signal that send at detected said first terminal, other base stations;
Detecting unit 505; The pilot tone of the data-signal that is used for sending according at least two terminals detects the data-signal of the other-end transmission except that first terminal in first data-signal that sends at first terminal and at least two terminals from the data-signal that receiving element 504 receives;
Merge cells 506 is used to merge the data-signal that send at detected first terminal of first data-signal and other base stations, obtains the estimated signal of the data-signal that sends at first terminal.
From the above; The present embodiment of base station can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Since be at least two terminals at same system transmitted over resources data-signal, thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes terminal acquisition good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal; Further; Present embodiment can also receive the data-signal that send at detected first terminal, other base stations; And then can data-signal and self detected first data-signal that send at detected first terminal, other base stations be merged; Obtain more estimated signal, precision that can the operation of raising system near primary signal.
The embodiment of the invention also provides communication system, and the communication system embodiment one that the embodiment of the invention provides comprises first base station, but first base station link to each other with communication mode with first terminal, wherein:
First base station is used to obtain the information that first terminal is in cell edge, confirms the system resource and first pilot frequency information of first terminal transmission data-signal; The information and first pilot frequency information of system resource are sent to first terminal; On system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal of at least two terminal transmissions, the pilot tone that send at first terminal is corresponding with first pilot frequency information; Be used for pilot tone, from the data-signal that receives, detect first data-signal that send at said first terminal according to the data-signal of at least two terminals transmissions.
From the above; First base station in the present embodiment can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Since be at least two terminals at same system transmitted over resources data-signal, thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes terminal acquisition good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal.
Fig. 6 has described the structure of the communication system embodiment two that the embodiment of the invention provides, comprises first base station 601 and second base station 602; Wherein:
First base station 601 is used to obtain the information that first terminal is in cell edge, confirms the system resource and first pilot frequency information of first terminal transmission data-signal; The information and first pilot frequency information of system resource are sent to first terminal; On system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal of at least two terminal transmissions, the pilot tone that send at first terminal is corresponding with first pilot frequency information; Be used for pilot tone, from the data-signal that receives, detect first data-signal that send at said first terminal according to the data-signal of at least two terminals transmissions; Receive the data-signal that send at 602 detected first terminals, second base station, merge the data-signal that send at first data-signal and 602 detected first terminals, second base station, obtain the estimated signal of the data-signal that sends at first terminal;
Second base station 602 is used to detect the data-signal from first terminal, will send to first base station 601 from the signal at first terminal.
From the above; First base station in the present embodiment can be with the terminal scheduling that is in cell edge to same system transmitted over resources data-signal; Thereby can receive the data-signal that send at least two terminals from this system resource; Since be at least two terminals at same system transmitted over resources data-signal, thereby the transmitting power that need not improve the terminal just can improve the performance of the uplink at terminal, makes terminal acquisition good quality of service; Further,, can the service quality of other-end not impacted, can not waste the limited power resources at terminal yet owing to need not improve the transmitting power at terminal; Further; First base station can also receive the data-signal that send at detected first terminal, second base station in the present embodiment; And then can data-signal and self detected first data-signal that send at detected first terminal, second base station be merged; Obtain more estimated signal, precision that can the operation of raising system near primary signal.
Further; First base station in the communication system that the embodiment of the invention provides can also be used for coordinating the system resource that data-signal is sent at definite first terminal with second base station, and first pilot frequency information of data is sent at definite first terminal from the pilot frequency information of preserving in advance;
Or
First base station also is used for coordinating the system resource and first pilot frequency information that data-signal is sent at definite first terminal with second base station.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises the steps: when carrying out
Obtain the information that first terminal is in cell edge;
Confirm the system resource and first pilot frequency information of said first terminal transmission data-signal;
The information and said first pilot frequency information of said system resource are sent to said first terminal;
On said system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone that send at said first terminal is corresponding with said first pilot frequency information;
The pilot tone of the data-signal that sends according to said at least two terminals detects first data-signal that send at said first terminal from the data-signal that receives.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than a kind of method for transmitting signals, base station and communication system that the embodiment of the invention provided have been carried out detailed introduction, the explanation of above embodiment just is used for help understanding method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. a method for transmitting signals is characterized in that, comprising:
Obtain the information that first terminal is in cell edge;
Confirm the system resource and first pilot frequency information of said first terminal transmission data-signal;
The information and said first pilot frequency information of said system resource are sent to said first terminal;
On said system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone that send at said first terminal is corresponding with said first pilot frequency information;
The pilot tone of the data-signal that sends according to said at least two terminals detects first data-signal that send at said first terminal from the data-signal that receives.
2. method for transmitting signals as claimed in claim 1 is characterized in that, this method also comprises:
The pilot tone of the data-signal that sends according to said at least two terminals detects the data-signal of the transmission of the other-end except that said first terminal in said at least two terminals from the said data-signal that receives;
Send the data-signal that detected said other-end sends.
3. according to claim 1 or claim 2 method for transmitting signals is characterized in that this method also comprises:
Receive the data-signal that send at detected said first terminal, other base stations;
Further comprise after from the said data-signal that receives, detecting first data-signal that sends at said first terminal:
Merge the data-signal that send at detected said first terminal in said first data-signal and other base stations, obtain the estimated signal of the data-signal that sends at said first terminal.
4. method for transmitting signals as claimed in claim 1; It is characterized in that; The pilot tone of the said data-signal that sends according to said at least two terminals, the step that from the said data-signal that receives, detects first data-signal that sends at said first terminal is specially:
The pilot tone of the data-signal that sends according to said at least two terminals confirms that said at least two terminals send the channel response parameter of data, uses according to said channel response parameter to receive Processing Algorithm and calculate said first data-signal.
5. method for transmitting signals as claimed in claim 1 is characterized in that, the system resource of data-signal is sent at said definite said first terminal and the step of first pilot frequency information is specially:
Coordinate the system resource that data-signal is sent at definite said first terminal with the base station of neighbor cell, first pilot frequency information of data-signal is sent at definite said first terminal from the pilot frequency information of preserving in advance.
6. method for transmitting signals as claimed in claim 1 is characterized in that, the system resource of data-signal is sent at said definite said first terminal and the step of first pilot frequency information is specially:
Coordinate system resource and said first pilot frequency information that data-signal is sent at definite said first terminal with the base station of neighbor cell.
7. method for transmitting signals as claimed in claim 1 is characterized in that, saidly obtains the step that first terminal is in the information of cell edge and is specially:
Receive the message that send at said first terminal, this message comprises that said first terminal is in the information of cell edge.
8. a base station is characterized in that, comprising:
Acquiring unit is used to obtain the information that first terminal is in cell edge;
Confirm the unit, be used for obtaining after said first terminal is in the information of cell edge, confirm that said first terminal sends the system resource and first pilot frequency information of data-signal at said acquiring unit;
Transmitting element, the information and said first pilot frequency information that are used for the said system resource that said definite unit is definite send to said first terminal;
Receiving element; Receive the data-signal of at least two terminals transmissions that comprise said first terminal on the said system resource that is used for confirming in said definite unit; The pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone of first data-signal that send at said first terminal is corresponding with said first pilot frequency information;
Detecting unit is used for the pilot tone according to the data-signal of said at least two terminals transmission, from the data-signal that said receiving element receives, detects first data-signal that send at said first terminal.
9. base station as claimed in claim 8; It is characterized in that; Said detecting unit also is used for the pilot tone according to the data-signal of said at least two terminals transmission, from the data-signal that send at said at least two terminals, detects the data-signal that the other-end except that said first terminal sends in said at least two terminals;
Said transmitting element also is used to send the data-signal that said other-end that said detection goes out sends.
10. like claim 8 or 9 described base stations, it is characterized in that said receiving element also is used to receive the data-signal that send at detected said first terminal, other base stations;
Said base station also comprises:
Merge cells is used to merge the data-signal that send at detected said first terminal of said first data-signal and other base stations, obtains the estimated signal of the data-signal that sends at said first terminal.
11. a communication system is characterized in that, comprises first base station, but said first base station link to each other with communication mode with first terminal, wherein:
Said first base station is used to obtain the information that first terminal is in cell edge, confirms the system resource and first pilot frequency information of said first terminal transmission data-signal; The information and said first pilot frequency information of said system resource are sent to said first terminal; On said system resource, receive the data-signal of at least two terminals transmissions that comprise said first terminal, the pilot tone quadrature of the data-signal that send at said at least two terminals, the pilot tone that send at said first terminal is corresponding with said first pilot frequency information; Be used for pilot tone, from the data-signal that send at said at least two terminals that receive, detect first data-signal that send at said first terminal according to the data-signal of said at least two terminals transmission.
12. communication system according to claim 11 is characterized in that, said system further comprises second base station,
Said second base station is used to detect the data-signal from said first terminal, and said signal from first terminal is sent to said first base station;
Said first base station; Also be used to receive the data-signal that sends from detected said first terminal, said second base station; Merge the data-signal that send at detected said first terminal in said first data-signal and second base station, obtain the estimated signal of the data-signal that sends at said first terminal.
13. communication system according to claim 11 is characterized in that, said system further comprises second base station,
Said first base station also is used for coordinating the system resource that data-signal is sent at definite said first terminal with said second base station, and first pilot frequency information of data-signal is sent at definite said first terminal from the pilot frequency information of preserving in advance.
14. communication system according to claim 11 is characterized in that, said system further comprises second base station,
Said first base station also is used for coordinating system resource and said first pilot frequency information that data-signal is sent at definite said first terminal with said second base station.
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| CN109804696A (en) * | 2016-10-12 | 2019-05-24 | 华为技术有限公司 | A kind of method of dispatch terminal and base station |
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