CN103875292B - A kind of cooperative scheduling method and the network equipment - Google Patents
A kind of cooperative scheduling method and the network equipment Download PDFInfo
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- CN103875292B CN103875292B CN201380002987.4A CN201380002987A CN103875292B CN 103875292 B CN103875292 B CN 103875292B CN 201380002987 A CN201380002987 A CN 201380002987A CN 103875292 B CN103875292 B CN 103875292B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
Abstract
The embodiment of the invention discloses a kind of cooperative scheduling method and the network equipment, emitting performance of the multiple cell not in the case of stringent synchronization can be lifted.Methods described is used for wireless communication system, and user terminal UE main serving cell and cooperation cell cooperate with the system provides communication service for the UE, and method includes：The network equipment obtains phase compensation amount of first signal relative to secondary signal, wherein described first signal is the Physical Downlink Shared Channel PDSCH signals that the cooperation cell is transmitted to the UE, and the secondary signal is the physical downlink control channel PDCCH signal that the main serving cell is transmitted to the UE；Then the network equipment controls the cooperation cell transmitting to carry out the first signal after phase precompensation according to the phase compensation amount, to cause the first signal after the phase precompensation and the secondary signal synchronous.The present invention is applied to the communications field.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of cooperative scheduling method and the network equipment.
Background technology
For traditional wireless cellular network, the user in serving cell edge is due to by multiple cell signals
Interference so that channel condition is relatively poor, user terminal（User Equipment, UE）The measurement of correlation parameter of feedback, such as
Reference Signal Received Power（Reference Signal Receiving Power, RSRP）Or Reference Signal Received Quality
（Reference Signal Receiving Quality, RSRQ）Deng occurring error unavoidably.Fed back so as to system according to UE
Measurement of correlation parameter, erroneous judgement is easily caused when the mobile management and the cell switch determining that carry out UE so that serving cell edge
User toggles between serving cell and the adjacent area of serving cell, introduces pingpang handoff phenomenon, reduces Consumer's Experience.
On the other hand, with the increase of current network access amount, the possible saturation of channel capacity of cell, cell is easily caused
Business throughput can not meet the situation of user's request, and then also Consumer's Experience be reduced.
In the prior art, the pingpang handoff or Zone being likely to occur in solving the problems, such as cell mobility management gulp down
When the amount of telling can not meet the problem of user's request, Physical Downlink Control Channel can be used under the mode of multi-cell cooperating
（Physical Downlink Control Channel, PDCCH）And Physical Downlink Shared Channel（Physical Downlink
Shared Channel, PDSCH）Launch the mode of separation, i.e. UE main serving cell and cooperation cell collaboration carries for the UE
For communication service, PDCCH channels are issued by main serving cell, and PDSCH channels can then lead to according to the state of present channel, system side
The cooperation crossed between multiple cell, the adaptively selected more preferable cooperation cell of channel quality are launched.Realize and flow from standard agreement
Journey sees that this method is feasible, but actual use when, then can face one it is serious the problem of：I.e. no matter main serving cell with
Cooperation cell is two cells under different websites, or two cells under same website, actually can not all be accomplished very
Accurately signal is synchronous.And if two cells for carrying out multi-cell cooperating can not accomplish that very accurately signal is synchronous, then uses
The PDCCH signals and PDSCH signals of two cell transmissions of PDCCH and PDSCH transmitting separate modes can not also be accomplished accurately
Synchronous, this cooperation radiation pattern can have significantly sacrificing in performance, may such as cause the orthogonal frequency division multiplexing of main serving cell
With（Orthogonal Frequency Division Multiplexing, OFMD）Intersymbol interference（Inter Symbol
Interference, ISI）Or to terminal-specific pilot tone（Dedicated RS, DRS）Channel estimation influences serious.
The content of the invention
Embodiments of the invention provide a kind of cooperative scheduling method and the network equipment, can lift multiple cell not stringent synchronization
In the case of emitting performance.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
First aspect, there is provided a kind of network equipment, for wireless communication system, user terminal UE main clothes in the system
Business cell and cooperation cell collaboration provide communication service for the UE, and the network equipment includes acquiring unit and control unit；
The acquiring unit, for obtaining phase compensation amount of first signal relative to secondary signal, wherein described first
Signal is the Physical Downlink Shared Channel PDSCH signals that the cooperation cell is transmitted to the UE, and the secondary signal is described
Main serving cell is transmitted to the physical downlink control channel PDCCH signal of the UE；
Described control unit, the phase for controlling the cooperation cell transmitting to be obtained according to the acquiring unit are mended
The amount of repaying carries out the first signal after phase precompensation, to cause the first signal after the phase precompensation and the secondary signal
It is synchronous.
In first aspect in the first possible implementation, with reference in a first aspect, the acquiring unit obtains including first
Modulus block, determining module；
First acquisition module, it is inclined relative to the up timing of the main serving cell for obtaining the cooperation cell
Difference；
The determining module, for the uplink timing error obtained according to first acquisition module, it is determined that described
First signal relative to the secondary signal phase compensation amount.
In second of possible implementation of first aspect, the first possible implementation, institute with reference to first aspect
The first acquisition module is stated to be specifically used for：
According to real-time measurements, obtain the UE transmittings upward signal transmitted on the cooperation cell phase for
Uplink timing error when being transmitted in the main serving cell；Or
Obtain uplink timing error of the default cooperation cell relative to the main serving cell.
In first aspect in the third possible implementation, with reference to second of possible implementation of first aspect, institute
The first acquisition module is stated to be specifically used for：
The uplink detection reference signal SRS launched according to the UE, first time point and the second time point are obtained respectively, its
In, the first time point is the time that the uplink SRS reaches the cooperation cell, and second time point is described up
SRS reaches the time of the main serving cell；
According to the first time point and second time point, the uplink timing error is calculated.
In the 4th kind of possible implementation of first aspect, with reference to first aspect, the first possible implementation is to
On the one hand the third possible implementation, the determining module are specifically used for:
Uplink timing error result of the inverted is defined as the phase compensation amount；Or
The result after default first residue value is added after the uplink timing error is negated and is defined as the phase benefit
The amount of repaying.
In the 5th kind of possible implementation of first aspect, with reference to the 4th kind of possible reality of first aspect to first aspect
Existing mode, described control unit include the second acquisition module and sending module；
Second acquisition module, for obtaining the first letter after phase precompensation is carried out according to the phase compensation amount
Number；
The sending module, for the first signal hair after the phase precompensation that obtains second acquisition module
The cooperation cell is given, the first signal after the phase precompensation is launched by the cooperation cell.
In the 6th kind of possible implementation of first aspect, with reference to the 4th kind of possible reality of first aspect to first aspect
Existing mode, described control unit include sending module；
The sending module, for the phase compensation amount to be sent into the cooperation cell, obtained by the cooperation cell
Take and the first signal after phase precompensation is carried out according to the phase compensation amount, and launch the first letter after the phase precompensation
Number.
In the 7th kind of possible implementation of first aspect, with reference to the 6th kind of possible reality of first aspect to first aspect
Existing mode, described control unit are specifically used for：
The phase compensation amount for controlling the cooperation cell transmitting to be obtained according to the acquiring unit, it is public with reference to first
Formula, carries out the first signal after phase precompensation, and first formula is：
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；x(k),For to the kth
Corresponding signal carries out the first signal after phase precompensation on frequency domain carriers；△ is phase compensation amount；π, k are constant；N is
Fourier transformation length.
Second aspect, there is provided a kind of cooperative scheduling method, for wireless communication system, user terminal UE in the system
Main serving cell and cooperation cell collaboration provide communication service for the UE, and methods described includes：
The network equipment obtains phase compensation amount of first signal relative to secondary signal, wherein first signal is described
Cooperation cell is transmitted to the Physical Downlink Shared Channel PDSCH signals of the UE, and the secondary signal is the main serving cell
It is transmitted to the physical downlink control channel PDCCH signal of the UE；
After the network equipment controls the cooperation cell transmitting to carry out phase precompensation according to the phase compensation amount
First signal, to cause the first signal after the phase precompensation and the secondary signal synchronous.
In second aspect in the first possible implementation, with reference to second aspect, the network equipment obtains the first letter
Number include relative to the phase compensation amount of secondary signal：
The network equipment obtains uplink timing error of the cooperation cell relative to the main serving cell；
The network equipment determines first signal relative to the secondary signal according to the uplink timing error
Phase compensation amount.
In second of possible implementation of second aspect, the first possible implementation, institute with reference to second aspect
State the network equipment acquisition cooperation cell includes relative to the uplink timing error of the main serving cell：
The network equipment obtains the upward signal of the UE transmittings on the cooperation cell according to real-time measurements
Relative to the uplink timing error when being transmitted in the main serving cell during transmission；Or
The network equipment obtains uplink timing error of the default cooperation cell relative to the main serving cell.
In second aspect in the third possible implementation, with reference to second of possible implementation of second aspect, institute
The network equipment is stated according to real-time measurements, the upward signal for obtaining the UE transmittings transmits phase pair on the cooperation cell
Uplink timing error when being transmitted in the main serving cell includes：
The uplink detection reference signal SRS that the network equipment is launched according to the UE, respectively obtain first time point and
Second time point, wherein, the first time point is the time that the uplink SRS reaches the cooperation cell, when described second
Between point time of the main serving cell is reached for the uplink SRS；
The network equipment calculates the uplink timing error according to the first time point and second time point.
In the 4th kind of possible implementation of second aspect, with reference to second aspect, the first possible implementation is to
The third possible implementation in terms of two, the network equipment determine first signal according to the uplink timing error
Phase compensation amount relative to the secondary signal includes：
Uplink timing error result of the inverted is defined as the phase compensation amount by the network equipment；Or
The network equipment adds the result determination after default first residue value after the uplink timing error is negated
For the phase compensation amount.
In the 5th kind of possible implementation of second aspect, with reference to the 4th kind of possible reality of second aspect to second aspect
Existing mode, the network equipment control the cooperation cell transmitting to carry out the after phase precompensation according to the phase compensation amount
One signal specifically includes：
The network equipment obtains the first signal after phase precompensation is carried out according to the phase compensation amount；
The first signal after the phase precompensation is sent to the cooperation cell by the network equipment, by the cooperation
The first signal after phase precompensation described in cell transmission.
In the 6th kind of possible implementation of second aspect, with reference to the 4th kind of possible reality of second aspect to second aspect
Existing mode, the network equipment control the cooperation cell transmitting to carry out the after phase precompensation according to the phase compensation amount
One signal specifically includes：
The phase compensation amount is sent to the cooperation cell by the network equipment, and basis is obtained by the cooperation cell
The phase compensation amount carries out the first signal after phase precompensation, and launches the first signal after the phase precompensation.
In the 7th kind of possible implementation of second aspect, with reference to the 6th kind of possible reality of second aspect to second aspect
Existing mode, it is described to be included according to phase compensation amount progress phase precompensation：
According to the phase compensation amount, with reference to the first formula, phase precompensation is carried out to first signal, described first
Formula is：
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；x(k),For to the kth
Corresponding signal carries out the first signal after phase precompensation on frequency domain carriers；△ is phase compensation amount；π, k are constant；N is
Fourier transformation length.
The third aspect, there is provided a kind of network equipment, for wireless communication system, user terminal UE main clothes in the system
Business cell and cooperation cell collaboration provide communication service for the UE, and the network equipment includes processor and memory, described
Memory and the processor communication, store program codes in the memory, and the processor is used to call the storage
The program code stored in device, perform the method as described in any one of second aspect.
The embodiment of the present invention provides a kind of cooperative scheduling method and the network equipment, for wireless communication system, the system
Middle UE main serving cell and cooperation cell collaboration provide communication service for the UE, and methods described includes：The network equipment obtains
First signal relative to secondary signal phase compensation amount, wherein first signal be the cooperation cell be transmitted to the UE
PDSCH signals, the secondary signal is that the main serving cell is transmitted to the PDCCH signals of the UE；Then the network
Equipment controls the cooperation cell transmitting to carry out the first signal after phase precompensation according to the phase compensation amount, to cause
State the first signal after phase precompensation and the secondary signal is synchronous.So, because first after the phase precompensation believes
The skew with phase compensation amount equal extent number is carried out on the multipath of delay profile relative to first signal so that can be with
With secondary signal in cooperative scheduling it is synchronous, and then can avoid in the prior art the first signal reach UE at the time of it is asynchronous in
Situation at the time of secondary signal reaches UE occurs, so as to improve emitting performance of the multiple cell not in the case of stringent synchronization.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of cooperative scheduling method that the embodiment of the present invention one provides；
Fig. 2 be the embodiment of the present invention one provide the first signal reach UE at the time of lag behind secondary signal reach UE when
The scene graph at quarter；
Fig. 3 be the embodiment of the present invention one provide the first signal reach UE at the time of be ahead of secondary signal reach UE when
The scene graph at quarter；
Fig. 4 is a kind of cooperative scheduling method that the embodiment of the present invention two provides；
Fig. 5 is the scene graph for a kind of PDCCH and PDSCH the transmitting separation that the embodiment of the present invention two provides；
Fig. 6 is the network equipment infrastructure schematic diagram one that the embodiment of the present invention three provides；
Fig. 7 is the network equipment infrastructure schematic diagram two that the embodiment of the present invention three provides；
Fig. 8 is the network equipment infrastructure schematic diagram three that the embodiment of the present invention three provides；
Fig. 9 is the network equipment infrastructure schematic diagram four that the embodiment of the present invention three provides；
Figure 10 is a kind of network equipment infrastructure schematic diagram that the embodiment of the present invention four provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that the embodiments described below are only part of the embodiment of the present invention, rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiment, belong to the scope of protection of the invention.
Embodiment one,
One embodiment of the invention provides a kind of cooperative scheduling method, and methods described is used for wireless communication system, the system
Middle UE main serving cell and cooperation cell collaboration provide service for the UE, specifically as shown in figure 1, this method can specifically wrap
Include：
101st, the network equipment obtains phase compensation amount of first signal relative to secondary signal, wherein, first signal
The PDSCH signals of the UE are transmitted to for the cooperation cell, the secondary signal is described in the main serving cell is transmitted to
UE PDCCH signals.
Specifically, in cooperative scheduling method provided in an embodiment of the present invention, the side of separation is launched using PDCCH and PDSCH
Formula carries out the cooperative scheduling between multiple cell.Wherein, the network equipment determines that UE is allocated PDSCH in the cooperation cell,
PDCCH is allocated in the main serving cell, the PDSCH signals that the cooperation cell is transmitted to the UE are regarded as the first signal；
The PDCCH signals that the main serving cell is transmitted to the UE are regarded as secondary signal.
It should be noted that the main serving cell may be by same BTS management, the network with the cooperation cell
Equipment is located in the base station；The main serving cell may also be set with the cooperation cell by different base station management, the network
The last layer level network equipment of the standby base station for being the base station of the main serving cell and the cooperation cell, the embodiment of the present invention pair
This is not especially limited.
But the mode of the PDCCH and PDSCH transmitting separation, easily cause 2 cells of cooperation can not accomplish accurately
Signal is synchronous, and following two kinds of situations specifically occur：
1）At the time of situation one, the first signal lag behind secondary signal arrival UE at the time of reaching UE：
As shown in Fig. 2 under normal flow, cell special references of the UE based on main serving cell（Cell-specific
Reference Signal, CRS）Tracking is synchronized to signal, searches the first path position of the first signal as Timing Synchronization
Point, in addition, to improve robustness, UE may shift to an earlier date Timing Synchronization point of several sampled points as UE on the basis of first path position.
After synchronization, UE carries out the reception processing of ofdm signal according to new Timing Synchronization point, carry out time-frequency convert it
Before, UE can carry out cyclic prefix（Cyclic prefix, CP）Operation.As seen from Figure 2, under CP protection, in advance
Several sampled points do not interfere with the acquisition of complete ofdm signal as UE Timing Synchronization point.
In this case, at the time of although the first signal lags behind secondary signal arrival UE at the time of reaching UE, lagging
In the case of the not super CP of value, reception processings of the UE to signal, which will not produce, to be significantly affected.
It should be noted that CRS is cell common pilots, the time-frequency location of CRS particular sequences and occupancy is and physics
Cell ID is related.UE can be based on CRS and carry out the related works such as down channel estimation, synchronized tracking and descending measurement.With regard to the 3rd
For partner program version（The3rd Generation Partnership Project Release, 3GPP R）8 or
For 3GPP R9 or 3GPP R10 agreements, descending PDCCH signalings are to carry out related channel estimation and demodulation by CRS
Decoding.
2）At the time of situation two, the first signal are ahead of secondary signal arrival UE at the time of reaching UE：
As shown in figure 3, under normal flow, UE synchronizes tracking to signal based on the CRS of main serving cell, searches
The first path position of one signal is as synchronous point, in addition, to improve robustness, UE may shift to an earlier date several adopt on the basis of first path position
Timing Synchronization point of the sampling point as UE.
After synchronization, UE carries out the reception processing of ofdm signal according to new Timing Synchronization point, carry out time-frequency convert it
Before, UE can carry out CP operation, and as seen from Figure 3, under the scene, UE is imperfect to the reception of the first signal, and can introduce
OFMD ISI。
To sum up analyze, when carrying out cooperative scheduling transmitting, UE cooperation cell is asynchronous with the signal of main serving cell can
It can cause performance loss.Especially under the scene of the above situation two, performance loss is more serious.
In addition, it is contemplated that when carrying out multi-cell cooperating scheduling, in order to realize to UE emission value and power information
It is transparent, it is necessary to use DRS carry out channel estimation.And in order to improve the result of channel estimation, DRS channel estimations would generally use dimension
The method improving performance of nanofiltration ripple.In the method for the Wiener filtering, the Wiener filtering coefficient of its frequency domain is normally based on elder generation
Test caused by model.Non- special UE can consider when the Wiener filtering coefficient based on prior model is calculated in modeling
UE timing offset problem.Generally according to the timing tracking flow of routine, timing offset is generally defined within several sampling points（It is several
Ten nanoseconds rank）, but caused timing offset in the case of following at least one, such as：Sample global positioning system（Global
Positioning System, GPS）The synchronized transmissions carried out between base station there will still likely be obvious timing offset；UE cooperation
The base station of cell and the base station of UE main serving cell are eated dishes without rice or wine apart from timing offset caused by difference relative to UE（According to electromagnetism
The transmission speed of ripple, 1 meter has 3.3ns propagation delay time, if eating dishes without rice or wine 50 meters of distance difference, it is meant that 165ns difference）；
Propagation delay time deviation caused by device is undesirable so that at the time of reaching with secondary signal UE at the time of the first signal reaches UE
Timing offset may exceed well over tens nanoseconds rank, and the situation can cause DRS channel estimations prior model and actual signal
Mismatch, and then have a strong impact on the performance of DRS channel estimations.
It should be noted that DRS is the special demodulation pilot tone of user, it can directly bearing downlink precoding/wave beam into
Type（Beamforming）Weights, while can also direct load power information.Therefore, carrying out channel estimation by DRS can obtain
Channel information after equivalent weighting is taken, also implies that system side can be realized to the transparent of UE emission value and power information.
Therefore, in the embodiment of the present invention, the network equipment obtains the first signal relative to the phase compensation amount of secondary signal, institute
The first signal and the secondary signal synchronization in cooperative scheduling after phase precompensation can be caused by stating phase compensation amount.
Specifically, the phase compensation amount can obtain in the following way：
After the network equipment obtains uplink timing error of the cooperation cell relative to the main serving cell, according on this
Row timing offset determines phase compensation amount of first signal relative to secondary signal, wherein, the uplink timing error is probably pre-
If in the network device, it is also possible to obtained according to real-time measurements, the embodiment of the present invention is not especially limited to this.
102nd, after the network equipment controls the cooperation cell transmitting to carry out phase precompensation according to the phase compensation amount
First signal, to cause the first signal after the phase precompensation and the secondary signal synchronous.
Specifically, after the network equipment obtains the first signal relative to the phase compensation amount of secondary signal, it is described
The network equipment will control the cooperation cell transmitting according to the first signal after phase compensation amount progress phase precompensation.
Control the cooperation cell transmitting phase pre- specifically, the embodiment of the present invention provides the following two kinds network equipment
The method of the first signal after compensation：
After mode one, the network equipment obtain the phase compensation amount, directly according to the phase compensation amount, to described first
Signal carries out phase precompensation, obtains the first signal after carrying out phase precompensation, then by the after the phase precompensation
One signal is sent to the cooperation cell, and the first signal after the phase precompensation is launched by the cooperation cell；
The phase compensation amount of acquisition is sent to the cooperation cell by mode two, the network equipment, small by the cooperation
Area carries out phase precompensation to first signal, obtains first after carrying out phase precompensation according to the phase compensation amount
Launch the first signal after the phase precompensation after signal.
The embodiment of the present invention controls the network equipment cooperation cell to launch first after the phase precompensation
The mode of signal is not especially limited.
Specifically, the network equipment or the cooperation cell be according to the phase compensation amount, to first signal
The method for carrying out phase precompensation can be as follows：
According to the phase compensation amount, with reference to formula（1）, phase precompensation is carried out to first signal.
Formula（1）
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；x(k),For to the kth
Corresponding signal carries out the first signal after phase precompensation on frequency domain carriers；△ is phase compensation amount；π, k are constant, and N is Fu
In leaf transformation length, exemplary depending on the bandwidth of the cooperation cell, if 20M bandwidth, then N can be set to
2048；If 10M bandwidth, then N can be set to 1024.
By first signal, the phase compensation amount substitutes into formula（1）, you can obtain the first letter after phase precompensation
Number.
The embodiments of the invention provide a kind of cooperative scheduling method, this method is used for wireless communication system, in the system
UE main serving cell and cooperation cell collaboration provide communication service for the UE, and methods described includes：The network equipment obtains the
One signal relative to secondary signal phase compensation amount, wherein first signal be the cooperation cell be transmitted to the UE's
PDSCH signals, the secondary signal are the PDCCH signals that the main serving cell is transmitted to the UE；Then network equipment control
Make the cooperation cell transmitting and the first signal after phase precompensation is carried out according to the phase compensation amount.So, it is because described
The first signal after phase precompensation has carried out same with phase compensation amount relative to first signal on the multipath of delay profile
Etc. the skew of degree so that can with secondary signal in cooperative scheduling it is synchronous, and then can avoid in the prior art first letter
Number reach UE at the time of it is asynchronous in secondary signal reach UE at the time of situation occur, so as to lift multiple cell not stringent synchronization
In the case of emitting performance.
Embodiment two,
The embodiment of the present invention provides a kind of cooperative scheduling method, and methods described is used for wireless communication system, in the system
UE main serving cell and cooperation cell collaboration provide service for the UE, and combination of embodiment of the present invention PDSCH and PDCCH launches
The technology of separation illustrates, it is specific as shown in figure 4, including：
401st, the network equipment determines that UE is allocated PDSCH in the cooperation cell, is allocated in the main serving cell
PDCCH。
Specifically, in the prior art, to solve the problems, such as the pingpang handoff or small being likely to occur in cell mobility management
When area's business throughput can not meet the problem of user's request, PDCCH and PDSCH can be used under the mode of multi-cell cooperating
Launch the mode of separation, for the integrality that scheme is realized, the embodiment of the present invention provides the network equipment and determines to carry out UE first
The condition of cooperative scheduling is as follows：
A, user capability is identified system side, the protocol version and Multiple Input Multiple Output that identification UE is supported
（Multiple-Input Multiple-Out-put, MIMO）Ability.
Exemplary, the protocol version that UE is supported can be the transmission mode based on CRS（Transmission mode,
TM）2、TM3、TM4、TM5、TM6；Or the protocol version that UE is supported can be the TM7 based on DRS, 8,9,10；Only example herein
Property the protocol version for enumerating some UE supports type, it is specific to UE to support any protocol version to be not especially limited.
Wherein, TM7 is R8 protocol characteristics, and TM8 is R9 protocol characteristics, and TM9 is R10 protocol characteristics, and TM10 is agreement after R11
Characteristic.
B, the base station of each serving cell receives the measurement of correlation parameter of UE feedbacks, such as this serving cell and adjacent cell
The measurement results such as RSRP, RSRQ, and receive the channel quality instruction of each serving cell（Channel quality
Indicator, CQI）Metrical information.
C, the measurement of correlation parameter and the CQI of each serving cell of reception that system side is fed back according to UE judge whether UE locates
In serving cell edge.
Exemplary, it can judge whether UE is in cell edge according to Reference Signal Received Power RSRP.If such as originally
The RSRP of the RSRP ＜ adjacent cells of serving cell, it may be determined that UE is in the edge of this serving cell.
D, possesses DRS edge UE, if cell traffic throughput performance is unable to meet demand, or user is in a short time
Pingpang handoff phenomenon is frequently occurred, then the network equipment determines to carry out cooperative scheduling and transmitting to the UE.
Further, after the network equipment determines to carry out cooperative scheduling to the UE, then for the UE by PDCCH and
The idiographic flow of PDSCH transmitting separation can be simply described as follows：
First, in cooperative scheduling, for R8 edge customers, switched it to by high-level signaling to TM7 patterns；To R9
For edge customer, switched it to by high-level signaling to TM8 patterns；For R10 edge customers, by high-level signaling by its
TM9 patterns are switched to, for R11 edge customers, are switched it to by high-level signaling to TM10 patterns.
Secondly, it is small in the main service as shown in figure 5, the network equipment determines that UE is allocated PDSCH in the cooperation cell
Area is allocated PDCCH.
It is described by UE main serving cell it should be noted that why being UE distribution PDSCH by UE cooperation cell
UE distributes PDCCH, is because signaling bag is by the main serving cell（That is this serving cell）Transmitting makes whole cooperative scheduling process
Imperceptible switching, packet is by the cooperation cell（That is adjacent cell）The channel that transmitting can mitigate the main serving cell is born
Carry, and then user can be caused to obtain preferable service quality in the case of imperceptible switching, lift Consumer's Experience, and
The frequent generation of pingpang handoff phenomenon can be avoided.
It should be noted that Fig. 5 is only a kind of exemplary scene graph for providing PDCCH and PDSCH transmitting and separating, this
For main serving cell described in scape figure with the cooperation cell by different base station management, the network equipment is the main serving cell
Base station and the cooperation cell base station the last layer level network equipment, but as described in step 101, the main service is small
Area may also be not especially limited with the cooperation cell by same BTS management, the embodiment of the present invention to this.
402nd, the network equipment obtains uplink timing error of the cooperation cell relative to the main serving cell.
Specifically, the network equipment can obtain the uplink timing error in the following way：
The UE has been prestored in the network equipment makees uplink timing error of the cell relative to the main serving cell,
The network equipment can obtain the default uplink timing error.
It should be noted that the uplink timing error is the prior information for UE cooperation cell, should suitable for access
All UE of cooperation cell, it may be possible to laggard according to the uplink timing error of multiple real-time measurement cooperation cell and serving cell
Row statistics determination is obtained, and the embodiment of the present invention is not especially limited to this.
Optionally, the network equipment can obtain the uplink timing error in the following way：
The network equipment obtains the upward signal of the UE transmittings on the cooperation cell according to real-time measurements
Relative to the uplink timing error when being transmitted in the main serving cell during transmission.
Here a kind of network equipment is provided according to real-time measurements, obtains the upward signal of the UE transmittings in institute
It is as follows for the method for the uplink timing error when being transmitted in the main serving cell to state transmission phase on cooperation cell：
First, the uplink detection signal that the network equipment is launched according to the UE（Sounding Reference
Signal, SRS）Pilot tone, obtain first time point and the second time point respectively, wherein, the first time point is on described
Row SRS reaches the time of the cooperation cell, and second time point is that the uplink SRS reaches the main serving cell
Time.
It should be noted that the pilot tone of the uplink SRS is mainly used in the measurement and estimation of uplink signal-channel quality, Yi Jiji
Calculate the Signal to Interference plus Noise Ratio of up channel（Signal to Interference plus Noise Ratio, SINR）,
It is specific to be used for supporting the up scheduling of UE.By the uplink SRS pilot tone, can measure the first time point and it is described second when
Between point.
Then, the network equipment calculates the up timing according to the first time point and second time point
Deviation.That is, the first time point and second time point can specifically be done to difference, and then it is inclined to obtain the up timing
Difference, i.e.,
Uplink timing error=time point the formula of first time point-the second（2）
By formula（2）As can be seen that the uplink timing error be likely to be on the occasion of, it is also possible to be negative value, the present invention
Embodiment is not especially limited to this.
403rd, the network equipment determines phase compensation of first signal relative to secondary signal according to the uplink timing error
Amount.
Wherein, first signal is the PDSCH signals that the cooperation cell is transmitted to the UE, and the secondary signal is
The main serving cell is transmitted to the PDCCH signals of the UE.
Specifically, the embodiment of the present invention can estimate the phase compensation amount according to the uplink timing error.It is exemplary
, uplink timing error result of the inverted can be defined as phase compensation amount；Or the embodiment with reference to shown in Fig. 1
The analysis of middle situation one is understood, in cooperative scheduling, if the first signal lags behind secondary signal and reaches UE's at the time of reaching UE
At the moment, in the case where lagged value is not less than CP, the acquisition of complete ofdm signal is not interfered with.So in order to ensure that cooperation is adjusted
It is also that the up timing is inclined after the uplink timing error is obtained when spending as far as possible under the scene described in situation one
Difference negate after add default first residue value after result be defined as phase compensation amount, wherein, the first residue value can
Think positive number, or negative, the embodiment of the present invention are not especially limited to this, and the numerical value span of first residue is 0
To between CP.
404th, after the network equipment controls the cooperation cell transmitting to carry out phase precompensation according to the phase compensation amount
First signal, to cause the first signal after the phase precompensation and the secondary signal synchronous.
Specifically, after the network equipment obtains the first signal relative to the phase compensation amount of secondary signal, it is described
The network equipment will control the cooperation cell transmitting according to the first signal after phase compensation amount progress phase precompensation.
Specifically, the method for the first signal after the network equipment control cooperation cell transmitting phase precompensation can
The description of step 102, the embodiment of the present invention will not be repeated here in embodiment with reference to shown in figure 1.
Specifically, the network equipment or the UE cooperation cell carry out phase precompensation to first signal
Method refers to the description of step 102 in embodiment shown in Fig. 1, and the embodiment of the present invention will not be repeated here.
The embodiments of the invention provide a kind of cooperative scheduling method, this method is used for wireless communication system, in the system
UE main serving cell and cooperation cell collaboration provide communication service for the UE, and methods described includes：The network equipment obtains the
One signal relative to secondary signal phase compensation amount, wherein first signal be the cooperation cell be transmitted to the UE's
PDSCH signals, the secondary signal are the PDCCH signals that the main serving cell is transmitted to the UE；Then network equipment control
Make the cooperation cell transmitting and the first signal after phase precompensation is carried out according to the phase compensation amount.So, it is because described
The first signal after phase precompensation has carried out same with phase compensation amount relative to first signal on the multipath of delay profile
Etc. the skew of degree so that can with secondary signal in cooperative scheduling it is synchronous, and then can avoid in the prior art first letter
Number reach UE at the time of it is asynchronous in secondary signal reach UE at the time of situation occur, so as to lift multiple cell not stringent synchronization
In the case of emitting performance.
Embodiment three,
The embodiment of the present invention provides a kind of network equipment 600, for wireless communication system, user terminal UE in the system
Main serving cell and cooperation cell collaboration provide communication service for the UE, the network equipment 600 in the present embodiment can be used
In performing the corresponding operating in above method embodiment, specifically as shown in fig. 6, the network equipment 600 includes acquiring unit 601
With control unit 602.
The acquiring unit 601, for obtaining phase compensation amount of first signal relative to secondary signal, wherein described the
One signal is the Physical Downlink Shared Channel PDSCH signals that the cooperation cell is transmitted to the UE, and the secondary signal is institute
State the physical downlink control channel PDCCH signal that main serving cell is transmitted to the UE.
Described control unit 602, for controlling the cooperation cell transmitting according to obtaining the acquiring unit 601
Phase compensation amount carries out the first signal after phase precompensation, to cause the first signal after the phase precompensation and described the
Binary signal is synchronous.
Further, as shown in fig. 7, the acquiring unit 601 specifically includes the first acquisition module 6011, determining module
6012。
First acquisition module 6011, for obtaining the cooperation cell relative to the up fixed of the main serving cell
When deviation.
The determining module 6012, for the uplink timing error obtained according to first acquisition module 6011,
Determine phase compensation amount of first signal relative to the secondary signal.
Further, first acquisition module 6011 be specifically used for obtain as follows the cooperation cell relative to
The uplink timing error of the main serving cell：
According to real-time measurements, obtain the UE transmittings upward signal transmitted on the cooperation cell phase for
Uplink timing error when being transmitted in the main serving cell；Or
Obtain uplink timing error of the default cooperation cell relative to the main serving cell.
Further, first acquisition module 6011 obtains the up letter that the UE launches according to real-time measurements
Number on the cooperation cell transmit phase in the main serving cell transmit when uplink timing error specifically include：
The uplink detection reference signal SRS launched according to the UE, first time point and the second time point are obtained respectively, its
In, the first time point is the time that the uplink SRS reaches the cooperation cell, and second time point is described up
SRS reaches the time of the main serving cell；
According to the first time point and second time point, the uplink timing error is calculated.
Further, the determining module 6012 is specifically used for being obtained according to first acquisition module 6011 as follows
The uplink timing error taken, determine phase compensation amount of first signal relative to the secondary signal:
Uplink timing error result of the inverted is defined as the phase compensation amount；Or
The result after default first residue value is added after the uplink timing error is negated and is defined as the phase benefit
The amount of repaying.
Further, described control unit 602 can control the cooperation cell transmitting to be obtained according to as follows
The phase compensation amount for taking unit 601 to obtain carries out the first signal after phase precompensation：
In a kind of possible implementation, as shown in figure 8, described control unit 602 includes the He of the second acquisition module 6021
Sending module 6022.
Second acquisition module 6021, for obtaining first after phase precompensation is carried out according to the phase compensation amount
Signal.
The sending module 6022, for after the phase precompensation that obtains second acquisition module 6021
One signal is sent to the cooperation cell, and the first signal after the phase precompensation is launched by the cooperation cell.
In alternatively possible implementation, as shown in figure 9, described control unit 602 specifically includes sending module 6022.
The sending module 6022 is small by the cooperation for the phase compensation amount to be sent into the cooperation cell
Area obtains the first signal after phase precompensation is carried out according to the phase compensation amount, and launches the after the phase precompensation
One signal.
Further, described control unit 602 is specifically used for：
The phase compensation amount for controlling the cooperation cell transmitting to be obtained according to the acquiring unit 601, with reference to first
Formula, carries out the first signal after phase precompensation, and first formula is：
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；x(k),For to the kth
Corresponding signal carries out the first signal after phase precompensation on frequency domain carriers；△ is phase compensation amount；π, k are constant；N is
Fourier transformation length.
Specifically, the method that cooperative scheduling is carried out by the network equipment 600 refers to embodiment one or embodiment two
Description, the embodiment of the present invention repeats no more to this.
The embodiment of the present invention provides a kind of network equipment, and for wireless communication system, UE main service is small in the system
Area and cooperation cell collaboration provide communication service for the UE, including:Acquiring unit obtains the first signal relative to secondary signal
Phase compensation amount, wherein first signal, which is the cooperation cell, is transmitted to the Physical Downlink Shared Channel of the UE
PDSCH signals, the secondary signal are the physical downlink control channel PDCCH letter that the main serving cell is transmitted to the UE
Number；It is pre- that the phase compensation amount that control unit controls the cooperation cell transmitting to be obtained according to the acquiring unit carries out phase
The first signal after compensation, to cause the first signal after the phase precompensation and the secondary signal synchronous.So, because
Described control unit controls the first signal after the phase precompensation of the cooperation cell transmitting to believe relative to described first
The skew with phase compensation amount equal extent number is carried out on the multipath of delay profile so that can be adjusted with secondary signal cooperating
It is synchronous when spending, so can avoid the first signal in the prior art reach at the time of UE it is asynchronous in secondary signal reach UE when
The situation at quarter occurs, so as to lift emitting performance of the multiple cell not in the case of stringent synchronization.
Example IV,
The embodiment of the present invention provides a kind of network equipment 1000, for wireless communication system, user terminal in the system
UE main serving cell and cooperation cell collaboration provide communication service for the UE, and the network equipment 1000 in the present embodiment can
For performing the corresponding operating in above method embodiment, specific as shown in Figure 10, the network equipment 1000 includes processor
1001 communicate with memory 1002, the memory 1002 with the processor 1001, storage program in the memory 1002
Code, and the processor 1001 is used to call the program code stored in the memory 1002, performs operations described below：
Phase compensation amount of first signal relative to secondary signal is obtained, wherein first signal is the cooperation cell
The Physical Downlink Shared Channel PDSCH signals of the UE are transmitted to, the secondary signal is transmitted to institute for the main serving cell
State UE physical downlink control channel PDCCH signal.
The cooperation cell transmitting is controlled to carry out the first signal after phase precompensation according to the phase compensation amount, so that
Obtain the first signal after the phase precompensation and the secondary signal is synchronous.
Specifically, the first signal of the acquisition can include relative to the phase compensation of secondary signal：
Obtain uplink timing error of the cooperation cell relative to the main serving cell；
According to the uplink timing error, phase compensation amount of first signal relative to the secondary signal is determined.
Specifically, the acquisition cooperation cell can wrap relative to the uplink timing error of the main serving cell
Include：
According to real-time measurements, obtain the UE transmittings upward signal transmitted on the cooperation cell phase for
Uplink timing error when being transmitted in the main serving cell；Or
Obtain uplink timing error of the default cooperation cell relative to the main serving cell.
Specifically, it is described according to real-time measurements, the upward signal of the UE transmittings is obtained on the cooperation cell
It can include relative to the uplink timing error when being transmitted in the main serving cell during transmission：
The uplink detection reference signal SRS launched according to the UE, first time point and the second time point are obtained respectively, its
In, the first time point is the time that the uplink SRS reaches the cooperation cell, and second time point is described up
SRS reaches the time of the main serving cell；
According to the first time point and second time point, the uplink timing error is calculated.
Specifically, it is described according to the uplink timing error, determine first signal relative to the secondary signal
Phase compensation amount can include：
Uplink timing error result of the inverted is defined as the phase compensation amount；Or
The result after default first residue value is added after the uplink timing error is negated and is defined as the phase benefit
The amount of repaying.
In a kind of possible implementation, the control cooperation cell transmitting carries out phase according to the phase compensation amount
The first signal after the precompensation of position specifically includes：
Obtain the first signal after phase precompensation is carried out according to the phase compensation amount；
The first signal after the phase precompensation is sent to the cooperation cell, as described in the transmitting of the cooperation cell
The first signal after phase precompensation.
In alternatively possible implementation, the control cooperation cell transmitting is carried out according to the phase compensation amount
The first signal after phase precompensation specifically includes：
The phase compensation amount is sent to the cooperation cell, obtained by the cooperation cell according to the phase compensation
Amount carries out the first signal after phase precompensation, and launches the first signal after the phase precompensation.
Specifically, described can include according to phase compensation amount progress phase precompensation：
According to the phase compensation amount, with reference to the first formula, phase precompensation is carried out to first signal, described first
Formula is：
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；x(k),For to the kth
Corresponding signal carries out the first signal after phase precompensation on frequency domain carriers；△ is phase compensation amount；π, k are constant；N is
Fourier transformation length.
Specifically, the method that cooperative scheduling is carried out by the network equipment 1000 refers to embodiment one or embodiment two
Description, the embodiment of the present invention repeats no more to this.
Based on the network equipment provided in an embodiment of the present invention, because the processor can call and perform the memory
The program code of middle storage so that carried out according to the phase compensation amount after phase precompensation the of cooperation cell transmitting
One signal has carried out the skew with phase compensation amount equal extent relative to first signal on the multipath of delay profile, can be with
With secondary signal in cooperative scheduling it is synchronous, and then can avoid in the prior art the first signal reach UE at the time of it is asynchronous in
Situation at the time of secondary signal reaches UE occurs, so as to lift emitting performance of the multiple cell not in the case of stringent synchronization.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description,
, can be as needed and by above-mentioned function distribution only with the division progress of above-mentioned each functional module for example, in practical application
Completed by different functional modules, i.e., the internal structure of device is divided into different functional modules, it is described above to complete
All or part of function.The specific work process of the system of foregoing description, device and unit, it may be referred to preceding method implementation
Corresponding process in example, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the module or
The division of unit, only a kind of division of logic function, can there are other dividing mode, such as multiple units when actually realizing
Or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, institute
Display or the mutual coupling discussed or direct-coupling or communication connection can be by some interfaces, device or unit
INDIRECT COUPLING or communication connection, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment（Can be personal computer, server, or network equipment etc.）Or processor（processor）It is each to perform the present invention
The all or part of step of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage
（ROM, Read-Only Memory）, random access memory（RAM, Random Access Memory）, magnetic disc or CD
Etc. it is various can be with the medium of store program codes.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (15)
1. a kind of network equipment, it is characterised in that for wireless communication system, user terminal UE main service is small in the system
Area and cooperation cell collaboration provide communication service for the UE, and the network equipment includes acquiring unit and control unit；
The acquiring unit, for obtaining phase compensation amount of first signal relative to secondary signal, wherein first signal
The Physical Downlink Shared Channel PDSCH signals of the UE are transmitted to for the cooperation cell, the secondary signal is the main clothes
Business cell transmission gives the physical downlink control channel PDCCH signal of the UE；
Described control unit, for the phase compensation amount for controlling the cooperation cell transmitting to be obtained according to the acquiring unit
The first signal after phase precompensation is carried out, to cause the first signal after the phase precompensation and the secondary signal same
Step；
The acquiring unit includes the first acquisition module, determining module；
First acquisition module, for obtaining uplink timing error of the cooperation cell relative to the main serving cell；
The determining module, for the uplink timing error obtained according to first acquisition module, determine described first
Signal relative to the secondary signal phase compensation amount.
2. the network equipment according to claim 1, it is characterised in that first acquisition module is specifically used for：
According to real-time measurements, the upward signal for obtaining the UE transmittings transmits phase in institute on the cooperation cell
State uplink timing error when being transmitted in main serving cell；Or
Obtain uplink timing error of the default cooperation cell relative to the main serving cell.
3. the network equipment according to claim 2, it is characterised in that first acquisition module is specifically used for：
The uplink detection reference signal SRS launched according to the UE, first time point and the second time point are obtained respectively, wherein,
The first time point is the time that the uplink SRS reaches the cooperation cell, and second time point is the uplink SRS
Reach the time of the main serving cell；
According to the first time point and second time point, the uplink timing error is calculated.
4. according to the network equipment described in any one of claims 1 to 3, it is characterised in that the determining module is specifically used for:
Uplink timing error result of the inverted is defined as the phase compensation amount；Or
The result after default first residue value is added after the uplink timing error is negated and is defined as the phase compensation amount.
5. according to the network equipment described in any one of claims 1 to 3, it is characterised in that described control unit obtains including second
Modulus block and sending module；
Second acquisition module, for obtaining the first signal after phase precompensation is carried out according to the phase compensation amount；
The sending module, it is sent to for the first signal after the phase precompensation that obtains second acquisition module
The cooperation cell, the first signal after the phase precompensation is launched by the cooperation cell.
6. according to the network equipment described in any one of claims 1 to 3, it is characterised in that described control unit includes sending mould
Block；
The sending module, for the phase compensation amount to be sent into the cooperation cell, root is obtained by the cooperation cell
The first signal after phase precompensation is carried out according to the phase compensation amount, and launches the first signal after the phase precompensation.
7. according to the network equipment described in any one of claims 1 to 3, it is characterised in that described control unit is specifically used for：
The phase compensation amount for controlling the cooperation cell transmitting to be obtained according to the acquiring unit, with reference to the first formula, enters
The first signal after row phase precompensation, first formula are：
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；X (k) ' is to the kth frequency domain
Corresponding signal carries out the first signal after phase precompensation on carrier wave；Δ is phase compensation amount；π, k are constant；N is in Fu
Leaf transformation length.
A kind of 8. cooperative scheduling method, it is characterised in that for wireless communication system, user terminal UE main clothes in the system
Business cell and cooperation cell collaboration provide communication service for the UE, and methods described includes：
The network equipment obtains phase compensation amount of first signal relative to secondary signal, wherein first signal is the cooperation
Cell transmission gives the Physical Downlink Shared Channel PDSCH signals of the UE, and the secondary signal is launched for the main serving cell
Physical downlink control channel PDCCH signal to the UE；
The network equipment controls the cooperation cell transmitting to carry out first after phase precompensation according to the phase compensation amount
Signal, to cause the first signal after the phase precompensation and the secondary signal synchronous；
The network equipment obtains the first signal to be included relative to the phase compensation amount of secondary signal：
The network equipment obtains uplink timing error of the cooperation cell relative to the main serving cell；
The network equipment determines phase of first signal relative to the secondary signal according to the uplink timing error
Compensation rate.
9. according to the method for claim 8, it is characterised in that it is relative that the network equipment obtains the cooperation cell
Include in the uplink timing error of the main serving cell：
According to real-time measurements, the upward signal for obtaining the UE transmittings transmits the network equipment on the cooperation cell
When relative in the main serving cell transmit when uplink timing error；Or
The network equipment obtains uplink timing error of the default cooperation cell relative to the main serving cell.
10. according to the method for claim 9, it is characterised in that the network equipment obtains institute according to real-time measurements
The upward signal for stating UE transmittings is up when transmitting phase on the cooperation cell for being transmitted in the main serving cell
Timing offset includes：
The uplink detection reference signal SRS that the network equipment is launched according to the UE, first time point and second is obtained respectively
Time point, wherein, the first time point reaches the time of the cooperation cell, second time point for the uplink SRS
The time of the main serving cell is reached for the uplink SRS；
The network equipment calculates the uplink timing error according to the first time point and second time point.
11. according to the method described in any one of claim 8 to 10, it is characterised in that the network equipment is according to described up
Timing offset, determine that first signal includes relative to the phase compensation amount of the secondary signal：
Uplink timing error result of the inverted is defined as the phase compensation amount by the network equipment；Or
The network equipment uplink timing error is negated after add default first residue value after result be defined as institute
State phase compensation amount.
12. according to the method described in any one of claim 8 to 10, it is characterised in that the network equipment controls the cooperation
Cell transmission specifically includes according to the first signal after phase compensation amount progress phase precompensation：
The network equipment obtains the first signal after phase precompensation is carried out according to the phase compensation amount；
The first signal after the phase precompensation is sent to the cooperation cell by the network equipment, by the cooperation cell
Launch the first signal after the phase precompensation.
13. according to the method described in any one of claim 8 to 10, it is characterised in that the network equipment controls the cooperation
Cell transmission specifically includes according to the first signal after phase compensation amount progress phase precompensation：
The phase compensation amount is sent to the cooperation cell by the network equipment, is obtained as the cooperation cell according to
Phase compensation amount carries out the first signal after phase precompensation, and launches the first signal after the phase precompensation.
14. according to the method described in any one of claim 8 to 10, it is characterised in that described to be entered according to the phase compensation amount
Row phase precompensation includes：
According to the phase compensation amount, with reference to the first formula, phase precompensation, first formula are carried out to first signal
For：
Wherein, x (k) is corresponding signal on the kth frequency domain carriers of cooperation cell transmitting；X (k) ' is to the kth frequency domain
Corresponding signal carries out the first signal after phase precompensation on carrier wave；Δ is phase compensation amount；π, k are constant；N is in Fu
Leaf transformation length.
A kind of 15. network equipment, it is characterised in that for wireless communication system, user terminal UE main service in the system
Cell and cooperation cell collaboration provide communication service for the UE, and the network equipment includes processor and memory, described to deposit
Reservoir and the processor communication, store program codes in the memory, and the processor is used to call the memory
The program code of middle storage, perform the method as described in claim any one of 8-14.
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| CN109219130B (en) * | 2017-06-30 | 2020-01-21 | 华为技术有限公司 | Synchronization method and device |
| CN111385823B (en) * | 2018-12-29 | 2023-08-01 | 南京中兴新软件有限责任公司 | Signal processing method and device |
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| CN101917381A (en) * | 2010-08-20 | 2010-12-15 | 西安电子科技大学 | Method for compensating delay difference among cells in cooperative multi-point transmission system |
| CN102545985A (en) * | 2012-01-13 | 2012-07-04 | 电信科学技术研究院 | Method and device for avoiding interference in coordinated multiple point transmission |
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| CN102547968B (en) * | 2012-01-16 | 2014-09-10 | 电信科学技术研究院 | Coordinated multiple-point transmission downlink synchronization method and device |
| EP2826317A4 (en) * | 2012-03-14 | 2015-10-14 | Nokia Solutions & Networks Oy | Method and apparatus providing inter-transmission point phase relationship feedback for joint transmission comp |
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| CN101917381A (en) * | 2010-08-20 | 2010-12-15 | 西安电子科技大学 | Method for compensating delay difference among cells in cooperative multi-point transmission system |
| CN102545985A (en) * | 2012-01-13 | 2012-07-04 | 电信科学技术研究院 | Method and device for avoiding interference in coordinated multiple point transmission |
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