CN102547872B - Method and device for transmitting bandwidth information - Google Patents

Abstract

The invention discloses a method and device for transmitting bandwidth information, which are used for transmitting bandwidth information in a CoMP system. The method comprises the steps: a base station determines a transmission bandwidth based on the condition that UE is needed to obtain downlink data or reference signals of the bandwidth information in a plurality of cells; the base station sends the determined indication information of the transmission bandwidth corresponding to the corresponding downlink data or reference signals to the UE; and the base station determines physical resources required to be occupied by the reference signals and sequences of the reference signals according to the transmission bandwidth determined aiming at the reference signals, transmits the sequences of the reference signals on the physical resources, or the base station determines physical resources occupied by the downlink data according to the transmission bandwidth determined aiming at the downlink data, sends indication information of the physical resources to the UE and then transmits the downlink data on the physical resources.

Description

A kind of method of transmission bandwidth information and device

Technical field

The present invention relates to the communications field, particularly relate to method and the device of transmission bandwidth information.

Background technology

In order to the transmission quality of the throughput or signal that improve system, propose in the industry CoMP (CoordinatedMultipoint Transmission/Reception, multi-point cooperative transmission) technology.The system applying this technology is called CoMP system.CoMP technology refers to the cooperation between multiple transfer points that geographical position is separated.In general, multiple transfer point is the base station of different districts, or multiple RRH (Remote Radio Head, mobile radio unit) that same cell base station controls.By the cooperation transmission between multiple transfer point, the interference between different transfer point can be effectively reduced, improve the throughput of user's particularly Cell Edge User.

Descending multi-point cooperative transmission technical scheme is mainly divided into two classes: cooperative scheduling/wave beam forming (CS/CB, cooperative scheduling/beamforming) and Combined Treatment (Joint processing).

Cooperative scheduling be by transfer point between time, frequency and space resources coordination, avoid or reduce interference each other.The interference of minizone is the principal element of restriction cell edge UE performance, and therefore cooperative scheduling is by reducing the interference of minizone, can improve the performance of cell edge UE.As shown in Figure 1, by the cooperative scheduling of 3 transfer points, three UE that may mutually disturb have been dispatched in mutually orthogonal resource and (have represented different resources with different lines), effectively avoid the interference between transfer point.

Collaborative wave beam inborn nature shape, by dispatching the figuration direction of user multiple in cooperation cell, makes the beam direction of different districts user mutually orthogonal, thus reduces interference each other.Be similar to MU-MIMO (Multiple Users-Multiple Input Multiple Output, the multi-user's multiple-input and multiple-output) transmission of single community, collaborative wave beam forming realizes mainly through the AF panel process of transmitting terminal.Therefore, in order to the interference suppressing the transmission of this user to be transmitted other users, need the descending channel information obtaining cooperation cell in base station end.

Combined Treatment scheme comprises dynamic transmission point and switches and combine transmission two kinds of modes.During dynamic transmission point switches, base station can switch the transfer point sending signal to user dynamically, thus each transfer point transmission data selecting optimum.Switch to realize dynamic transfer point, base station needs the channel information being obtained multiple alternative transport point by feedback channel information, or obtains the channel information of optimal transmission point.In associating delivery plan, multiple transfer point sends data, to strengthen UE Received signal strength to UE simultaneously.As shown in Figure 2, three transfer points send data to a UE on the same resource, and UE receives the signal of multiple transfer point simultaneously.On the one hand, the useful signal superposition from multiple transfer point can promote the signal quality that UE receives, and on the other hand, reduces the interference that UE is subject to, thus improves systematic function.This protocols call UE feeds back the channel information of multiple transfer point, even also wants the Relative channel information between transfer point, thus ensure multiple transfer point can combine carry out dispatching, precoding and data send.This transmission means can expand to the mode of multi-user joint transmission (MU-JT), namely this multiple transfer point sends data to multiple UE on the same resource simultaneously, demodulation performance is ensured by orthogonal DMRS (Demodulation Reference Signal, demodulated reference signal) between this multiple UE.

For multi-point cooperative transfer of data, when carrying out dynamic transmission cell merge, the object cell downlink system bandwidth switched may be different from cell-of-origin, and UE (subscriber equipment) possibly cannot obtain correct PDSCH transmission bandwidth after handover, thus cannot proper solution adjusting data.

In order to provide enough information to descending CoMP, base station needs the reference signal indicating UE dissimilar, and UE carries out certain operations according to these reference signals, to support above different transmission mode.As follows for different reference signal type analysis:

CRS (Cell-specific Reference Signal, cell reference signals): in order to support the switching at runtime between different districts, base station needs the CRS positional information indicating current PDSCH transmission community, frequency domain comprising CRS is shifted, port, bandwidth etc., muting (quiet) could be carried out on a corresponding position, to suppress CRS to the interference of PDSCH to PDSCH (Physical Downlink Shared Channel).Meanwhile, if UE will utilize CRS to carry out demodulation, also need the CRS bandwidth knowing that base station adopts in current PDSCH transmission community, the CRS sequence that could generate correct length is used for channel estimating.Wherein CRS sequence is generated by following formula:

$r_{l,n_s}\left(m\right)=\frac{1}{\sqrt{2}}(1-2c\·\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+1)),$ $m=\mathrm{0,1},...,2N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1,$ Down link maximum resource block directly obtained by the system bandwidth of community, CRS place, the mode of obtaining is prior art. cRS sequence in the resource that the index l of expression OFDM symbol and time slot n determines.

DMRS: in the mode of multi-user joint transmission, the UE carrying out resource multiplex may come from different communities, configures different system bandwidths.If these UE generate DMRS sequence according to respective downlink bandwidth, then the sequence length that may generate is different, cannot obtain orthogonal DMRS.The complete DMRS sequence of its middle port 7-14 is generated by following formula:

$r\left(m\right)=\frac{1}{\sqrt{2}}(1-2\·c\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+1)),$ $m=\left\{\begin{array}{cc}\mathrm{0,1},...,12N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1& \mathrm{normalcyclicprefix}\\ \mathrm{0,1},...,16N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1& \mathrm{extendedcyclicprefix}\end{array}\right.$

directly obtained by the corresponding downlink system bandwidth of DMRS, the mode of obtaining is prior art.Again according to the PRB (Physical Resource Block) that current PDSCH transmission takies, intercept the DMRS sequence of the DMRS sequence on corresponding PRB as UE.

The CSI-RS (Channel State Information Reference Signal) of non-zero power: in order to measure the channel information of multiple transfer point for CoMP, base station needs to indicate multiple CSI-RS to UE, be respectively used to the CSI measuring different transfer point, wherein, CSI-RS and transfer point are one-to-one relationship.If these transfer points belong to different communities, then the bandwidth of these communities may be different, and UE cannot determine which bandwidth should generate CSI-RS sequence according to, and UE may because of the bandwidth that adopts and base station inconsistent, generate the CSI-RS sequence inconsistent with base station, cause subsequent operation to realize.Its sequence is generated by following formula:

$r_{l,n_s}\left(m\right)=\frac{1}{\sqrt{2}}(1-2\·c\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+1)),$ $m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1$

directly obtained by the downlink system bandwidth of community, CSI-RS place, the mode of obtaining is prior art.

The CSI-RS of zero energy: for a UE, UE needs the transfer point (or community) beyond transfer point (or community) corresponding to down channel measured also may send the CSI-RS of non-zero power to this UE, and these CSI-RS be exactly disturb concerning this UE.On the larger resource location of some interference, base station can notify the CSI-RS of UE zero energy, i.e. muting is carried out to PDSCH in the position of corresponding CSI-RS, does not send the signal that this UE is useful, can avoid the flase drop on these positions like this.UE can receive the signal of interfered cell over these locations, therefore may be used for interferometry.Because concerning UE, zero energy CSI-RS is generally the non-zero power CSI-RS of interfered cell, so for the generation method of its sequence of non-zero power CSI-RS of interfered cell see introduction above.

To sum up, in CoMP system, relate to multiple transfer point (or multiple community), the system bandwidth of multiple community may be different, then UE cannot determine to adopt which system bandwidth as transmission bandwidth.Further, if the transmission bandwidth that base station and UE adopt is inconsistent, then cause UE cannot to the correct demodulation of downlink data, and the reference signal sequence mistake etc. generated.

Summary of the invention

The embodiment of the present invention provides a kind of method and device of transmission bandwidth information, for realizing the transmission of bandwidth information in CoMP system.

A method for transmission bandwidth information, is applied to base station side, comprises the following steps:

Downlink data or the reference signal of bandwidth information are known for needing UE in multiple communities of multipoint cooperative in base station, determine transmission bandwidth;

Base station sends the indication information of the transmission bandwidth corresponding with corresponding downlink data or reference signal determined to described UE;

Base station, according to the transmission bandwidth determined for reference signal, is determined the sequence of the physical resource that reference signal need take and reference signal, and transmit the sequence of described reference signal on described physical resource; Or

Base station, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data takies, and after the indication information of this physical resource is sent to UE, described physical resource is transmitted described downlink data.

A method for transmission bandwidth information, is applied to UE side, comprises the following steps:

UE receives the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends;

For downlink data, the transmission bandwidth of UE indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out Data Detection; Or

For reference signal, the transmission bandwidth of UE indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out AF panel; Or

For reference signal, the transmission bandwidth of UE indicated by indication information, determines the sequence of physical resource shared by downlink reference signal and reference signal, the physical resource determined carries out channel estimating according to corresponding sequence.

A kind of base station, comprising:

Control module, for for needing UE to know downlink data or the reference signal of bandwidth information in multiple communities of multipoint cooperative, determines transmission bandwidth;

Interface module, for sending the indication information of the transmission bandwidth corresponding with corresponding downlink data or reference signal determined to described UE;

Control module, according to the transmission bandwidth determined for reference signal, is determined the sequence of the physical resource that reference signal need take and reference signal, and is indicated interface module on described physical resource, transmit the sequence of described reference signal; Or

Control module, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data takies, and after indicating interface module that the indication information of this physical resource is sent to UE, described physical resource is transmitted described downlink data.

A kind of UE, comprising:

Interface module, for receiving the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends;

For downlink data, control module, for the transmission bandwidth indicated by indication information, determines the physical resource shared by downlink data, the physical resource determined carries out Data Detection; Or

For reference signal, control module, for the transmission bandwidth indicated by indication information, determines the physical resource shared by downlink data, the physical resource determined carries out AF panel; Or

For reference signal, control module, for the transmission bandwidth indicated by indication information, determines the sequence of physical resource shared by downlink reference signal and reference signal, the physical resource determined carries out channel estimating according to corresponding sequence.

In the embodiment of the present invention, base station is for the downlink data needed in multiple communities of multipoint cooperative to UE transmission or reference signal, determine transmission bandwidth, and the transmission bandwidth determined is sent to UE, so that UE obtains the definite transmission bandwidth for downlink data or reference signal in multipoint cooperative system, and be consistent with base station, to realize the operations such as channel measurement, AF panel, Data Detection.

Accompanying drawing explanation

The schematic diagram of system when Fig. 1 is cooperative scheduling in prior art;

Fig. 2 is the schematic diagram of system when combining transmission in prior art;

Fig. 3 is the method flow diagram that in the embodiment of the present invention, base station side realizes bandwidth information transmission;

Fig. 4 is the method flow diagram of UE transmission bandwidth information in the embodiment of the present invention;

Fig. 5 transmits the method flow diagram of transmission bandwidth and AF panel operation when being and carrying out AF panel for CRS in the embodiment of the present invention;

Fig. 6 be transmit in the embodiment of the present invention CRS transmission bandwidth and utilize CRS to carry out the method flow diagram measured;

Fig. 7 is the method flow diagram that the transmission bandwidth carrying out transmitting non-zero power CSI-RS in the embodiment of the present invention is measured;

Fig. 8 be transmit in the embodiment of the present invention zero energy CSI-RS transmission bandwidth and carry out the method flow diagram of AF panel;

Fig. 9 be transmit in the embodiment of the present invention DMRS transmission bandwidth and carry out the method flow diagram of channel estimating;

Figure 10 is the transmission bandwidth of transmitting downlink data the method flow diagram of downlink data receiving in the embodiment of the present invention;

Figure 11 is the structure chart of base station in the embodiment of the present invention;

Figure 12 is the structure chart of UE in the embodiment of the present invention.

Embodiment

In the embodiment of the present invention, base station is for the downlink data needed in multiple communities of multipoint cooperative to UE transmission or reference signal, determine transmission bandwidth, and the transmission bandwidth determined is sent to UE, so that UE obtains the definite transmission bandwidth for downlink data or reference signal in CoMP system, and be consistent with base station, to realize the operations such as channel measurement, AF panel, data receiver.

See Fig. 3, in the present embodiment base station side realize bandwidth information transmission method flow as follows:

Step 301: downlink data or the reference signal of bandwidth information are known for needing UE in multiple communities of multipoint cooperative in base station, determine transmission bandwidth.

Generally, base station is to send the transmission bandwidth of system bandwidth as corresponding downlink reference signal/downlink data of the community of corresponding downlink reference signal/downlink data (wherein downlink reference signal/downlink data represents downlink reference signal or downlink data or downlink reference signal and downlink data).If what send downlink reference signal/downlink data is multiple communities, then from the system bandwidth configuration of this multiple community, select a system bandwidth as the transmission bandwidth of corresponding downlink reference signal according to user scheduling situation.Such as, select system bandwidth larger or less in multiple system bandwidths of multiple community as the transmission bandwidth finally determined; Or select the system bandwidth that the number of cells of identical systems bandwidth is maximum, as the transmission bandwidth corresponding to corresponding downlink data transmission.An example, for the mode of multi-user joint transmission, may there is multiple transmission community in descending DMRS, can selective system bandwidth is minimum from the system bandwidth of multiple transmission range community as the transmission bandwidth corresponding to corresponding descending DMRS.

Step 302: base station sends the indication information of the transmission bandwidth corresponding with corresponding downlink data or reference signal determined to described UE.

Continue step 303 for reference signal below, continue step 304 for downlink data.

Step 303: base station, according to the transmission bandwidth determined for reference signal, is determined the sequence of the physical resource that reference signal need take and reference signal, and transmit the sequence of described reference signal on described physical resource.

Step 304: base station, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data takies, and after the indication information of this physical resource is sent to UE, described physical resource transmitted described downlink data.

In the present embodiment, reference signal comprises one or more in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power.

Concrete, when reference signal is CRS, base station needs UE to know the CRS of bandwidth information in multiple communities of multipoint cooperative, determines that the step of transmission bandwidth comprises: base station by transmission need UE to know the system bandwidth of the community of the CRS of bandwidth information is defined as transmission bandwidth corresponding to CRS.Such as, need to transmit CRS by 3 communities to UE, UE needs to measure the CRS of 3 communities.Then, the system bandwidth of these 3 communities is sent to UE by base station, and UE measures at the CRS that corresponding transmission bandwidth Shang Duige community, each community is corresponding.

Or, when reference signal is the CSI-RS of non-zero power, base station needs UE to know the CSI-RS of the non-zero power of bandwidth information in multiple communities of multipoint cooperative, determines that the step of transmission bandwidth comprises: transmission needs UE to know that the system bandwidth of the community of the CSI-RS of the non-zero power of bandwidth information is defined as transmission bandwidth corresponding to the CSI-RS of non-zero power by base station.Such as, the system bandwidth of these 3 communities is sent to UE by base station, and UE generates corresponding sequence according to the CSI-RS of the system bandwidth of each community to non-zero power corresponding to each community.

Or, when reference signal is the CSI-RS of zero energy, base station needs UE to know the CSI-RS of the zero energy of bandwidth information in multiple communities of multipoint cooperative, determines that the step of transmission bandwidth comprises: transmission needs UE to know that the system bandwidth of the interfered cell of the CSI-RS of the non-zero power that the CSI-RS of the zero energy of bandwidth information is corresponding is defined as transmission bandwidth corresponding to the CSI-RS of zero energy by base station.

Or, when reference signal is DMRS, the DMRS resource of bandwidth information is known for needing UE in multiple communities of multipoint cooperative in base station, determine that the step of transmission bandwidth comprises: base station needs UE to know the system bandwidth of the community of the DMRS of bandwidth information, for DMRS determines a transmission bandwidth according to transmission.

The corresponding relation of reference signal and community can be one to one, one-to-many or many-one.If community corresponding to the reference signal of bandwidth information has multiple to need UE to know, then the base station transmission bandwidth of selecting a system bandwidth to be defined as corresponding to this reference signal from the system bandwidth configuration of the plurality of community.Such as, 3 communities are had to apply same CRS, then the base station transmission bandwidth of selecting a system bandwidth to be defined as corresponding to this reference signal from the system bandwidth of these 3 communities.

Base station to the downlink data of UE transmission, determines that the step of transmission bandwidth comprises for needing in multiple communities of multipoint cooperative: base station according to needs to the system bandwidth of the community of UE transmitting downlink data, for downlink data determines a transmission bandwidth.If need the community to UE transmitting downlink data to have multiple, then base station selection system bandwidth from the system bandwidth configuration of the plurality of community is defined as the transmission bandwidth corresponding to corresponding downlink data.

Corresponding transmission bandwidth can be determined for multiple reference signal in base station simultaneously respectively, and sends to UE by one or more signaling.When sending the transmission bandwidth of multiple reference signal by one or more signaling, the rule that needs and UE agreement are fixed is with the transmission bandwidth information corresponding to the downlink reference signal wherein needed, such as distinguish by mark or distinguished by the indication information ad-hoc location in the signaling of transmission bandwidth, or adopt bandwidth maximum or minimum in multiple transmission bandwidth as the transmission bandwidth information corresponding to target downlink reference signal.

In the present embodiment, the indication information of transmission bandwidth has various ways, and the indication information as bandwidth is the value of bandwidth, or the indication information of bandwidth is the index of the value of corresponding bandwidth.Accordingly, for indication information multi-form of transmission bandwidth, base station sends the indication information of transmission bandwidth to UE by various ways.

Mode A1, when the indication information of bandwidth is the value of bandwidth, base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: base station sends the value of the transmission bandwidth determined to described UE by high-level signaling.

Mode A2, the indication information of transmission bandwidth is the index of the value of transmission bandwidth; Base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: base station sends the index of the value of the transmission bandwidth determined to described UE by high-level signaling.When adopting which, need in UE, configure the value of all possible system bandwidth and the corresponding relation of index in advance.

Mode A3, when the indication information of bandwidth is the index of the value of corresponding bandwidth, downlink data or the reference signal of bandwidth information are known for needing UE in multiple communities of multipoint cooperative in base station, before determining transmission bandwidth, also comprise step: the system bandwidth of multiple communities of multipoint cooperative and the corresponding relation of index are sent to UE by high-level signaling by base station; Base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: the index of the transmission bandwidth determined is sent to UE by physical downlink control channel PDCCH signaling by base station.

After base station adopts consistent transmission bandwidth with UE for reference signal and downlink data, UE can be made to carry out the operations such as channel measurement, AF panel, data receiver, then base station is to after described UE sends the indication information of the transmission bandwidth determined, for different application, one of following operation can be had at least:

Operation 1: for reference signal, the physical resource that reference signal need take, according to the transmission bandwidth determined for reference signal, is determined in base station, and on the physical resource determined transmission of reference signals.

Operation 2: for reference signal, base station is according to the transmission bandwidth determined for reference signal, determine the physical resource that reference signal need take, and according to the sequence of the transmission bandwidth generating reference signal determined for reference signal, and the physical resource that need take in reference signal sends the sequence of the reference signal of generation.

Concrete, method B1: the transmission bandwidth of base station corresponding to downlink reference signal, in conjunction with other configuration informations (such as port, the running time-frequency resource of this downlink reference signal, the information such as scrambling configuration), obtain physical resource that in this bandwidth, corresponding downlink reference signal takies and sequence.The method is mainly applicable to the reference signal beyond DMRS.

Method B2: the transmission bandwidth of base station corresponding to downlink reference signal, and the physical resource shared by downlink data transmission, in conjunction with other configuration informations (such as port of this downlink reference signal, running time-frequency resource, the information such as scrambling configuration), obtain physical resource that in this bandwidth, corresponding downlink reference signal takies and sequence.The method is mainly applicable to DMRS.

Operation 3: for downlink data, base station, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data need take, and the indication information of this physical resource is sent to UE, and phase UE sends downlink data on this physical resource.Preferably, the physical resource Information determined is informed to UE by the resource instructions field of DCI (Downlink ControlIndication, descending control instruction) by base station.

Accordingly, relative with base station, UE needs the indication information receiving transmission bandwidth, and applies it to multiple community, specifically see the following examples.

See Fig. 4, in the present embodiment, the method flow of UE transmission bandwidth information is as follows:

Step 401:UE receives the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends.

For different application or demand, at least one of the following step can be carried out.

Step 402: for downlink data, the transmission bandwidth of UE indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out Data Detection.

Step 403: for reference signal, the transmission bandwidth of UE indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out AF panel.

Step 404: for reference signal, the transmission bandwidth of UE indicated by indication information, determines the sequence of physical resource shared by downlink reference signal and reference signal, the physical resource determined carries out channel estimating according to corresponding sequence.

In the present embodiment, reference signal comprises one or more in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power.

Further, the indication information of transmission bandwidth has various ways, and corresponding UE obtains the indication information of transmission bandwidth by various ways.

For mode A1, when the indication information of bandwidth is the value of bandwidth, the step that UE receives the indication information of the transmission bandwidth that base station sends comprises: UE receives the value of the transmission bandwidth that base station sends by high-level signaling.

For mode A2, the indication information of transmission bandwidth is the index of the value of transmission bandwidth; UE reception base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: UE receives the index of the value of the transmission bandwidth that base station sends to described UE by high-level signaling

For mode A3, the indication information of transmission bandwidth is the index of the value of corresponding bandwidth; UE also comprises step before receiving the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends: UE receives the value of the system bandwidth of multiple communities of the multipoint cooperative that base station sends by high-level signaling; The step that UE receives the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends comprises: UE receives the index of the value of the transmission bandwidth that base station sends by Physical Downlink Control Channel (PDCCH) signaling.

After UE knows transmission bandwidth, can operate for reference signal and downlink data based on this transmission bandwidth in numerous applications.

Such as, for operation 1, for reference signal, UE, according to the transmission bandwidth determined for reference signal, determines the physical resource that reference signal need take.Preferably, the transmission bandwidth that the downlink data of UE indicated by indication information is corresponding, in conjunction with the resource information indicated by the resource instructions field in the DCI that base station sends, obtains the physical resource shared by downlink data.Then, UE carries out AF panel on the physical resource determined.Concrete, UE carries out PDSCH muting operation to the physical resource position of corresponding downlink reference signal on corresponding transmission bandwidth; Or UE receives corresponding downlink reference signal according to the physical resource determined on corresponding transmission bandwidth, and corresponding downlink reference signal is utilized to carry out interferometry operation.

For operation 2, for reference signal, UE is according to the sequence of the transmission bandwidth generating reference signal determined for reference signal.Concrete:

For the transmission bandwidth information that method B1:UE is corresponding according to corresponding downlink reference signal, directly obtain the sequence of corresponding downlink reference signal on this transmission bandwidth, the method is mainly applicable to the reference signal outside DMRS.

For the physical resource that the transmission bandwidth information that method B2:UE is corresponding according to corresponding downlink reference signal takies with this downlink reference signal, in conjunction with other configuration informations (such as port of this downlink reference signal, scrambling configuration etc.), obtain the sequence of corresponding downlink reference signal on this physical resource.Wherein, the transmission bandwidth that the downlink reference signal indicated by indication information is corresponding, and according to the data resource position indication information that base station sends, obtain the physical resource that in this bandwidth, corresponding downlink reference signal takies.The method is mainly applicable to DMRS.

For operation 3, for downlink data, UE, according to the transmission bandwidth determined for downlink data, determines the physical resource that downlink data need take, and on the physical resource determined downlink data receiving.

Owing to having different process and application to different reference signals and to downlink data, so introduce the implementation procedure of transmission transmission bandwidth in detail below by several exemplary embodiments.

See Fig. 5, the method flow transmitting transmission bandwidth and AF panel operation when carrying out AF panel for CRS in the present embodiment is as follows:

Suppose that the system bandwidth of the Serving cell of UE is 5M, current Bu Shi Serving cell, community of transmitting PDSCH to UE, but transmission bandwidth is another community of 10M, then its process of carrying out CRS relevant treatment is as follows:

Base station is in advance by the different districts CRS bandwidth information of correspondence and the index of correspondence respectively in its cooperation set of high-level signaling notice UE.UE receives and preserves the bandwidth information of CRS corresponding to cooperation set Zhong Ge community.Wherein, cooperation set refers to directly or the indirect set participating in forming to the transfer point of the cooperation of UE transmission.

Step 501: base station, according to the current CRS configuration information transmitting the community of PDSCH to UE, is determined the resource information needing the CRS carrying out PDSCH muting, comprised the transmission bandwidth information of this CRS.For above example, the system bandwidth of community transmitting PDCSH to UE is the transmission bandwidth that the CRS of 10M, Ze Gai community is corresponding be also 10M, thus needs the bandwidth information of the CRS carrying out PDSCH muting to be also 10M.

Step 502: base station needs by PDCCH signaling instruction UE is current the index of community, CRS place in cooperation set carrying out PDSCH muting.

After step 503:UE receives index information, according to the current CRS bandwidth information needing different districts in the index cooperated in set and cooperation set, community, CRS place of carrying out PDSCH muting, obtain the bandwidth information that the current CRS needing to carry out PDSCH muting is corresponding.

Step 504: base station is according to the bandwidth information needing the CRS carrying out PDSCH muting determined, in conjunction with other information such as port, Cell ID of this CRS, determine the sequence of physical resource shared by this CRS and this CRS, and send CRS sequence on the physical resource determined.

The bandwidth information that step 505:UE is corresponding according to CRS, in conjunction with other information such as port, Cell ID of this CRS, obtains the physical resource shared by CRS in this bandwidth.

Step 506:UE carries out PDSCH muting to the physical resource position that CRS takies on corresponding transmission bandwidth, thus avoids the CRS of current PDSCH transmission community to the interference of PDSCH transmission.

See Fig. 6, the transmission bandwidth transmitting CRS in the present embodiment and the method flow utilizing CRS to carry out measuring as follows:

Base station is in advance by the CRS bandwidth information of the different districts difference correspondence in its cooperation set of high-level signaling notice UE.

Step 601: base station is transmitted the community of PDSCH to UE according to current or needed UE to carry out the CRS configuration information of the community measured, determines to need the resource information of the CRS for demodulation or measurement, comprises the transmission bandwidth information of CRS.If transmit the community of PDSCH current to UE or the community that needs UE to carry out measuring only has one, the system bandwidth of Ze Yigai community is as transmission bandwidth corresponding to corresponding CRS.If the community that the current UE of needs carries out measuring has multiple, need the bandwidth information of the CRS for measuring also should comprise the system bandwidth information of this multiple community, and each needs need to carry out following steps respectively for the CRS measured.

Step 602: base station is by the current index of community, CRS place in cooperation set needed for demodulation or measurement of PDCCH signaling instruction UE.

After step 603:UE receives index information, according to the current CRS transmission bandwidth information needing different districts in index in cooperation set of community, CRS place for demodulation or measurement and cooperation set, obtain current needs for transmission bandwidth corresponding to the CRS of demodulation or measurement.

Step 604: base station is according to needing of determining bandwidth information for the CRS of demodulation or measurement, in conjunction with other information such as port, Cell ID of this CRS, determine the sequence of physical resource shared by this CRS and this CRS, and send CRS sequence on the physical resource determined.

The transmission bandwidth information that step 605:UE is corresponding according to described CRS, in conjunction with other information such as port, Cell ID of this CRS, obtains the sequence of physical resource on this transmission bandwidth shared by this CRS and CRS.

Step 606:UE is on the physical resource shared by described CRS, and the CRS sequence obtained with this locality according to receiving carries out channel estimating, obtains descending channel information, thus utilizes this channel information to carry out demodulation or measurement.

See Fig. 7, transmit the transmission bandwidth of non-zero power CSI-RS in the present embodiment and the method flow carrying out measuring is as follows:

Step 701: base station, by the system bandwidth of the transmission community of each non-zero power CSI-RS, is defined as the transmission bandwidth information that each non-zero power CSI-RS described is corresponding.

Step 702: base station notifies by high-level signaling the transmission bandwidth information that in its measuring assembly of UE, each non-zero power CSI-RS is corresponding.Measuring assembly refers to the set that the transfer point that UE needs to carry out descending channel information measurement is formed.

Step 703:UE receives by high-level signaling the transmission bandwidth information (value) that in its measuring assembly, each non-zero power CSI-RS is corresponding.

Step 704: the bandwidth information that base station is corresponding according to each non-zero power CSI-RS in described measuring assembly, in conjunction with other information such as port, running time-frequency resource position of each CSI-RS, obtain the physical resource shared by each CSI-RS and CSI-RS sequence, and on the physical resource determined, send each CSI-RS sequence.

The bandwidth information that step 705:UE is corresponding according to each non-zero power CSI-RS in described measuring assembly, in conjunction with other information such as port, running time-frequency resource position of each CSI-RS, obtain the physical resource shared by each CSI-RS and CSI-RS sequence.

Step 706:UE is on the physical resource shared by each CSI-RS, and the sequence according to the CSI-RS obtained with this locality received carries out channel estimating, obtains descending channel information, thus utilizes this channel information to carry out channel measurement or interferometry.

See Fig. 8, transmit the transmission bandwidth of zero energy CSI-RS in the present embodiment and to carry out the method flow of AF panel as follows:

Step 801: base station, by the system bandwidth of the transmission community of the non-zero power CSI-RS of each interfered cell, is defined as the bandwidth information that each zero energy CSI-RS of described UE is corresponding.

Step 802: base station notifies by high-level signaling the bandwidth information that each zero energy CSI-RS of UE is corresponding.

Step 803:UE receives bandwidth information corresponding to each zero energy CSI-RS by high-level signaling.

Step 804: base station is according to the bandwidth information of the non-zero power CSI-RS of interfered cell, in conjunction with other information such as port, running time-frequency resource position of this CSI-RS, obtain the physical resource shared by CSI-RS and the CSI-RS sequence of interfered cell, and on the physical resource determined, send the CSI-RS sequence of interfered cell.

The bandwidth information that step 805:UE is corresponding according to described zero energy CSI-RS, in conjunction with other information such as port, running time-frequency resource position of this zero energy CSI-RS, obtains each physical resource shared by zero energy CSI-RS.

Step 806:UE carries out PDSCHmuting on the physical resource shared by each zero energy CSI-RS, thus the non-zero power CSI-RS avoiding interference community is to the interference of PDSCH transmission.

See Fig. 9, transmit the transmission bandwidth of DMRS in the present embodiment and to carry out the method flow of channel estimating as follows:

Suppose descendingly at present have 2 communities to transmit PDSCH to UE, the system bandwidth of these 2 communities is 5M and 10M respectively simultaneously.Then the processing procedure of its DMRS is as follows:

Base station is in advance by the value of transmission bandwidth and the index of correspondence of the different districts difference correspondence in its cooperation set of high-level signaling notice UE.

Step 901: base station, according to the current system bandwidth configuration transmitting the community of PDSCH to UE, determines that the system bandwidth of a community is the transmission bandwidth that the DMRS of UE is corresponding.The current PDSCH having two cell transmission UE, getting wherein less transmission bandwidth is the transmission bandwidth that the DMRS of UE is corresponding, and namely 5M bandwidth is as transmission bandwidth corresponding to the DMRS of UE.

Step 902: base station is by the index of community in cooperation set of PDCCH signaling instruction UE current transmission PDSCH.

After step 903:UE receives index information, according to the index of community in cooperation set and the bandwidth information of different districts in cooperation set of current transmission PDSCH, obtain the system bandwidth of the community of current transmission PDSCH, namely obtain the transmission bandwidth that the DMRS of UE is corresponding.

Step 904: the transmission bandwidth that base station is corresponding according to DMRS, and the physical resource shared by descending PDSCH transmission, in conjunction with other information such as port, scrambling ID of this DMRS, obtain physical resource that this DMRS takies and DMRS sequence, and send DMRS sequence on the physical resource determined.

The transmission bandwidth that step 905:UE is corresponding according to DMRS, in conjunction with the resource information indicated by the resource instructions field in DCI, obtains the physical resource that this DMRS takies.

The physical resource that the bandwidth sum DMRS that step 906:UE is corresponding according to this DMRS takies, and other information such as the port of this DMRS, scrambling ID, obtain DMRS sequence.

Step 907:UE is on the physical resource shared by described DMRS, and the DMRS sequence obtained with this locality according to receiving carries out channel estimating, obtains descending channel information, thus utilizes this information to carry out demodulation.

See Figure 10, in the present embodiment transmitting downlink data transmission bandwidth and the method flow of downlink data receiving is as follows:

Have 3 communities in the cooperation set supposing current UE, the system bandwidth of these 3 communities is 5M, 5M and 10M respectively.PDSCH may be transmitted to UE in these 3 communities simultaneously, also may be that PDSCH is transmitted to UE in one of them or Liang Ge community.Then its data handling procedure is as follows:

Step 1001: the transmission bandwidth that the downlink data of UE is corresponding, according to the system bandwidth configuration may transmitting the community of PDSCH to UE, is determined in base station.Because PDSCH may be transmitted to UE in current You Sange community, wherein the community of 5M bandwidth has 2, and the community of 10M bandwidth has 1.The number of cells corresponding due to 5M bandwidth is more, therefore gets 5M as transmission bandwidth corresponding to the downlink data of UE.

Step 1002: base station notifies by high-level signaling the transmission bandwidth that its downlink data transmission of UE is corresponding.

Step 1003:UE is by the transmission bandwidth of high-level signaling downlink data receiving transmission correspondence.

Step 1004: this physical resource Information according to the physical resource shared in respective transmissions bandwidth of scheduling result determination downlink data transmission, and is informed to UE by the resource instructions field of DCI by base station.

Step 1005: the physical resource that base station takies in downlink data transmission sends corresponding downlink data.

The bandwidth that step 1006:UE is corresponding according to downlink data transmission, in conjunction with the resource information indicated by the resource instructions field in DCI, obtains the physical resource that downlink data transmission takies.

The physical resource that step 1007:UE takies in described downlink data transmission carries out demodulation to downlink data.

By the foregoing describing the transmitting procedure of having separated transmission bandwidth in multipoint cooperative, this process realizes primarily of base station and UE, is introduced below to the internal structure of these two equipment and function.

See Figure 11, in the present embodiment, base station comprises: control module 1101 and interface module 1102.

Control module 1101, for for needing UE to know downlink data or the reference signal of bandwidth information in multiple communities of multipoint cooperative, determines transmission bandwidth.

Interface module 1102 is for sending the indication information of the transmission bandwidth corresponding with corresponding downlink data or reference signal determined to described UE.

Control module 1101 also for according to the transmission bandwidth determined for reference signal, is determined the sequence of the physical resource that reference signal need take and reference signal, and is indicated interface module on described physical resource, transmit the sequence of described reference signal; Or control module 1101, according to the transmission bandwidth determined for downlink data, determines the physical resource that downlink data takies, and after indicating interface module that the indication information of this physical resource is sent to UE, described physical resource transmits described downlink data.

Reference signal comprise in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power one or more.

Concrete, when reference signal is CRS, control module 1101 need UE to know transmission the system bandwidth of the community of the CRS of bandwidth information is defined as transmission bandwidth corresponding to CRS.

When reference signal is the CSI-RS of non-zero power, transmission needs UE to know that the system bandwidth of the community of the CSI-RS of the non-zero power of bandwidth information is defined as transmission bandwidth corresponding to the CSI-RS of non-zero power by control module 1101.

When reference signal is the CSI-RS of zero energy, transmission needs UE to know that the system bandwidth of the interfered cell of the CSI-RS of the non-zero power that the CSI-RS of the zero energy of bandwidth information is corresponding is defined as transmission bandwidth corresponding to the CSI-RS of zero energy by control module 1101.

When reference signal is DMRS, control module 1101 needs UE to know the system bandwidth of the community of the DMRS of bandwidth information, for DMRS determines a transmission bandwidth according to transmission.

If community corresponding to the reference signal of bandwidth information has multiple to need UE to know, then control module 1101 transmission bandwidth of selecting a system bandwidth to be defined as corresponding to this reference signal from the system bandwidth configuration of the plurality of community.

For downlink data, control module 1101 according to needing to the system bandwidth of the community of UE transmitting downlink data, for downlink data determines a transmission bandwidth.If need the community to UE transmitting downlink data to have multiple, then control module 1101 selection system bandwidth from the system bandwidth configuration of the plurality of community is defined as the transmission bandwidth corresponding to corresponding downlink data.

The indication information of bandwidth has various ways, and has multiple advice method.Such as:

The indication information of transmission bandwidth is the value of transmission bandwidth; Interface module 1102 sends the value of the transmission bandwidth determined to described UE by high-level signaling.

Or the indication information of transmission bandwidth is the index of the value of transmission bandwidth; Interface module 1102 sends the index of the value of the transmission bandwidth determined to described UE by high-level signaling.

Or the indication information of transmission bandwidth is the index of the value of transmission bandwidth; The system bandwidth of multiple communities of multipoint cooperative is sent to UE by high-level signaling by interface module 1102; And by physical downlink control channel PDCCH signaling, the index of the transmission bandwidth determined is sent to UE.

For different application, control module also has several functions.Such as:

For reference signal, control module 1101 is also for according to the transmission bandwidth determined for reference signal, determine the physical resource that reference signal need take, and according to the sequence of the transmission bandwidth generating reference signal determined for reference signal, and the physical resource indicating interface module need take in reference signal sends the sequence of the reference signal of generation.

For downlink data, control module 1101 is also for according to the transmission bandwidth determined for downlink data, determine the physical resource that downlink data need take, and indicate interface module 1102 that the indication information of this physical resource is sent to UE, and phase UE sends downlink data on this physical resource.Preferably, the indication information of this physical resource is sent to UE by descending DCI by interface module 1102.

See Figure 12, in the present embodiment, UE comprises: interface module 1201 and control module 1202.

Interface module 1201 is for receiving the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal of base station transmission.

For downlink data, control module 1202, for the transmission bandwidth indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out Data Detection.

Or for reference signal, control module 1202, for the transmission bandwidth indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out AF panel.

Or for reference signal, control module 1202, for the transmission bandwidth indicated by indication information, is determined the sequence of physical resource shared by downlink reference signal and reference signal, the physical resource determined is carried out channel estimating according to corresponding sequence.

Reference signal comprise in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power one or more.

The indication information of bandwidth may have multiple, and the indication information as transmission bandwidth is the value of transmission bandwidth; Interface module 1201 receives the value of the transmission bandwidth that base station sends to described UE by high-level signaling.

Or the indication information of transmission bandwidth is the index of the value of transmission bandwidth; Interface module 1201 receives the index of the value of the transmission bandwidth that base station sends to described UE by high-level signaling.

Or the indication information of bandwidth is the index of the value of transmission bandwidth; Interface module 1201 receives the system bandwidth of multiple communities of the multipoint cooperative that base station sends by high-level signaling; And pass through the index that physical downlink control channel PDCCH signaling receives the value of the transmission bandwidth that base station sends.

For different application, control module 1202 has multiple concrete function, and e.g., the transmission bandwidth that the reference signal of control module 1202 indicated by indication information is corresponding, determines the length of the sequence of this reference signal, and then obtains the sequence of this reference signal; Or the transmission bandwidth that the downlink reference signal indicated by indication information is corresponding and the physical resource that this downlink reference signal takies, obtain the sequence of this reference signal; Or, the transmission bandwidth that downlink data indicated by indication information is corresponding, in conjunction with the resource information indicated by the resource instructions field in the DCI that base station sends, obtain the physical resource shared by downlink data, and then, the physical resource that the downlink reference signal determined takies carries out PDSCH muting operation, or, the physical resource that the downlink reference signal determined takies carries out interferometry operation.

Especially, if need UE to know, the reference signal of bandwidth information or downlink data have multiple, than if any 2 CRS and 3 CSI-RS, then need to carry out corresponding operating by method of the present invention respectively.

In the embodiment of the present invention, base station is for the downlink data needed in multiple communities of multipoint cooperative to UE transmission or reference signal, determine transmission bandwidth, and the transmission bandwidth determined is sent to UE, so that UE obtains the definite transmission bandwidth for downlink data or reference signal in multipoint cooperative system, and be consistent with base station, to realize the operations such as channel measurement, AF panel, data receiver.The embodiment of the present invention also for indicating mode and the follow-up application operating of the transmission bandwidth of downlink data transmission and various reference signal, is applicable to plurality of application scenes.The embodiment of the present invention has applicability widely, may be used for any antenna amount and aerial array (such as linear array, polarization battle array), the downlink transfer under any duplex system (TDD (time division duplex) system or FDD (Frequency Division Duplexing (FDD)) system) and any sending mode (such as SU-MIMO, MU-MIMO, CoMP).Be specially adapted to dynamic cell in CoMP mechanism switch and these two kinds of transmission mechanisms of joint transmission.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (32)

1. a method for transmission bandwidth information, is characterized in that, comprises the following steps:

Downlink data or the reference signal of bandwidth information are known for needing user equipment (UE) in multiple communities of multipoint cooperative in base station, determine transmission bandwidth; Wherein, base station is to send the transmission bandwidth of system bandwidth as corresponding downlink reference signal/downlink data of the community of corresponding downlink reference signal/downlink data, and downlink reference signal/downlink data represents downlink reference signal or downlink data or downlink reference signal and downlink data; Described transmission bandwidth is the system bandwidth selected from multiple communities of described multipoint cooperative according to user scheduling situation;

Base station sends the indication information of the transmission bandwidth corresponding with corresponding downlink data or reference signal determined to described UE;

Base station, according to the transmission bandwidth determined for reference signal, is determined the sequence of the physical resource that reference signal need take and reference signal, and transmit the sequence of described reference signal on described physical resource; Or

Base station, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data takies, and after the indication information of this physical resource is sent to UE, described physical resource is transmitted described downlink data.

2. the method for claim 1, is characterized in that, reference signal comprise in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power one or more.

3. method as claimed in claim 2, it is characterized in that, when reference signal is CRS, base station needs UE to know the CRS of bandwidth information in multiple communities of multipoint cooperative, determines that the step of transmission bandwidth comprises: base station by transmission need UE to know the system bandwidth of the community of the CRS of bandwidth information is defined as transmission bandwidth corresponding to CRS; Or

When reference signal is the CSI-RS of non-zero power, base station needs UE to know the CSI-RS of the non-zero power of bandwidth information in multiple communities of multipoint cooperative, determines that the step of transmission bandwidth comprises: transmission needs UE to know that the system bandwidth of the community of the CSI-RS of the non-zero power of bandwidth information is defined as transmission bandwidth corresponding to the CSI-RS of non-zero power by base station; Or

When reference signal is the CSI-RS of zero energy, base station needs UE to know the CSI-RS of the zero energy of bandwidth information in multiple communities of multipoint cooperative, determines that the step of transmission bandwidth comprises: transmission needs UE to know that the system bandwidth of the interfered cell of the CSI-RS of the non-zero power that the CSI-RS of the zero energy of bandwidth information is corresponding is defined as transmission bandwidth corresponding to the CSI-RS of zero energy by base station; Or

When reference signal is DMRS, the DMRS resource of bandwidth information is known for needing UE in multiple communities of multipoint cooperative in base station, determine that the step of transmission bandwidth comprises: base station needs UE to know the system bandwidth of the community of the DMRS of bandwidth information, for DMRS determines a transmission bandwidth according to transmission.

4. the method for claim 1, it is characterized in that, downlink data or the reference signal of bandwidth information are known for needing UE in multiple communities of multipoint cooperative in base station, determine transmission bandwidth, comprise: if need UE to know, community corresponding to the reference signal of bandwidth information has multiple, then the base station transmission bandwidth of selecting a system bandwidth to be defined as corresponding to this reference signal from the system bandwidth configuration of the plurality of community.

5. the method for claim 1, it is characterized in that, base station needs UE to know the downlink data of bandwidth information in multiple communities of multipoint cooperative, determine that the step of transmission bandwidth comprises: base station according to needs to the system bandwidth of the community of UE transmitting downlink data, for downlink data determines a transmission bandwidth.

6. method as claimed in claim 5, it is characterized in that, base station is according to the system bandwidth needed to the community of UE transmitting downlink data, for downlink data determines a transmission bandwidth, comprise: if needs have multiple to the community of UE transmitting downlink data, then the base station transmission bandwidth of selecting a system bandwidth to be defined as corresponding to corresponding downlink data from the system bandwidth configuration of the plurality of community.

7. the method for claim 1, is characterized in that, the indication information of transmission bandwidth is the value of transmission bandwidth; Base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: base station sends the value of the transmission bandwidth determined to described UE by high-level signaling; Or

The indication information of transmission bandwidth is the index of the value of transmission bandwidth; Base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: base station sends the index of the value of the transmission bandwidth determined to described UE by high-level signaling; Or

The indication information of bandwidth is the index of the value of transmission bandwidth; Downlink data or the reference signal of bandwidth information are known for needing UE in multiple communities of multipoint cooperative in base station, before determining transmission bandwidth, also comprise step: the system bandwidth of multiple communities of multipoint cooperative and the corresponding relation of index are sent to UE by high-level signaling by base station; Base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: the index of the transmission bandwidth determined is sent to UE by physical downlink control channel PDCCH signaling by base station.

8. the method for claim 1, it is characterized in that, the sequence of the physical resource that reference signal need take and reference signal, according to the transmission bandwidth determined for reference signal, is determined in base station, and on described physical resource, transmit described reference signal transmission bandwidth, comprising:

Reference signal is DMRS; Base station according to the transmission bandwidth determined for reference signal, and according to the physical resource shared by downlink data transmission, is determined the sequence of the physical resource that DMRS need take and generation DMRS, and on the described physical resource taken, is sent the sequence of the DMRS of generation.

9. the method for claim 1, is characterized in that, base station, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data takies, and the indication information of this physical resource is sent to UE, comprising:

The indication information of this physical resource is sent to UE by descending DCI by base station.

10. a method for transmission bandwidth information, is characterized in that, comprises the following steps:

UE receives the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends; Wherein, base station is to send the transmission bandwidth of system bandwidth as corresponding downlink reference signal/downlink data of the community of corresponding downlink reference signal/downlink data, and downlink reference signal/downlink data represents downlink reference signal or downlink data or downlink reference signal and downlink data; Described transmission bandwidth is the system bandwidth that base station is selected from multiple communities of described multipoint cooperative according to user scheduling situation;

For downlink data, the transmission bandwidth of UE indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out Data Detection; Or

For reference signal, the transmission bandwidth of UE indicated by indication information, determines the physical resource shared by downlink data, and the physical resource determined carries out AF panel; Or

For reference signal, the transmission bandwidth of UE indicated by indication information, determines the sequence of physical resource shared by downlink reference signal and reference signal, the physical resource determined carries out channel estimating according to corresponding sequence.

11. methods as claimed in claim 10, is characterized in that, reference signal comprise in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power one or more.

12. methods as claimed in claim 10, is characterized in that, the indication information of transmission bandwidth is the value of transmission bandwidth; UE reception base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: UE receives the value of the transmission bandwidth that base station sends to described UE by high-level signaling; Or

The indication information of transmission bandwidth is the index of the value of transmission bandwidth; UE reception base station sends step from the indication information of the transmission bandwidth determined to described UE comprises: UE receives the index of the value of the transmission bandwidth that base station sends to described UE by high-level signaling; Or

The indication information of transmission bandwidth is the index of the value of transmission bandwidth; UE also comprises step before receiving the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends: UE receives the value of the system bandwidth of multiple communities of the multipoint cooperative that base station sends by high-level signaling; The step that UE receives the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends comprises: UE receives the index of the value of the transmission bandwidth that base station sends by physical downlink control channel PDCCH signaling.

13. methods as claimed in claim 10, is characterized in that, the transmission bandwidth of UE indicated by indication information, determine to comprise the physical resource that downlink reference signal takies:

Reference signal is DMRS; The transmission bandwidth that the downlink reference signal of UE indicated by indication information is corresponding, and according to the data resource position indication information that base station sends, obtain the physical resource that in this bandwidth, corresponding downlink reference signal takies.

14. methods as claimed in claim 13, is characterized in that the transmission bandwidth of UE indicated by indication information is determined downlink reference signal sequence, being comprised:

The transmission bandwidth that the reference signal of UE indicated by indication information is corresponding, determines the length of the sequence of this reference signal, and then obtains the sequence of this reference signal; Or

The transmission bandwidth that the downlink reference signal of UE indicated by indication information is corresponding and the physical resource that this downlink reference signal takies, obtain the sequence of this reference signal.

15. methods as claimed in claim 10, is characterized in that the transmission bandwidth of UE indicated by indication information is determined the physical resource shared by downlink data, being comprised:

The transmission bandwidth that the downlink data of UE indicated by indication information is corresponding, in conjunction with the resource information indicated by the resource instructions field in the DCI that base station sends, obtains the physical resource shared by downlink data.

16. methods as claimed in claim 10, it is characterized in that, UE carries out AF panel on the physical resource determined, comprising:

The physical resource that UE takies at the downlink reference signal determined carries out PDSCH muting operation; Or

The physical resource that UE takies at the downlink reference signal determined carries out interferometry operation.

17. 1 kinds of base stations, is characterized in that, comprising:

Control module, for for needing UE to know downlink data or the reference signal of bandwidth information in multiple communities of multipoint cooperative, determines transmission bandwidth; Wherein, base station is to send the transmission bandwidth of system bandwidth as corresponding downlink reference signal/downlink data of the community of corresponding downlink reference signal/downlink data, and downlink reference signal/downlink data represents downlink reference signal or downlink data or downlink reference signal and downlink data; Described transmission bandwidth is the system bandwidth selected from multiple communities of described multipoint cooperative according to user scheduling situation;

Interface module, for sending the indication information of the transmission bandwidth corresponding with corresponding downlink data or reference signal determined to described UE;

Control module, according to the transmission bandwidth determined for reference signal, is determined the sequence of the physical resource that reference signal need take and reference signal, and is indicated interface module on described physical resource, transmit the sequence of described reference signal; Or

Control module, according to the transmission bandwidth determined for downlink data, is determined the physical resource that downlink data takies, and after indicating interface module that the indication information of this physical resource is sent to UE, described physical resource is transmitted described downlink data.

18. base stations as claimed in claim 17, is characterized in that, reference signal comprise in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power one or more.

19. base stations as claimed in claim 18, is characterized in that, when reference signal is CRS, control module by transmission need UE to know the system bandwidth of the community of the CRS of bandwidth information is defined as transmission bandwidth corresponding to CRS; Or

When reference signal is the CSI-RS of non-zero power, transmission needs UE to know that the system bandwidth of the community of the CSI-RS of the non-zero power of bandwidth information is defined as transmission bandwidth corresponding to the CSI-RS of non-zero power by control module; Or

When reference signal is the CSI-RS of zero energy, transmission needs UE to know that the system bandwidth of the interfered cell of the CSI-RS of the non-zero power that the CSI-RS of the zero energy of bandwidth information is corresponding is defined as transmission bandwidth corresponding to the CSI-RS of zero energy by control module; Or

When reference signal is DMRS, control module needs UE to know the system bandwidth of the community of the DMRS of bandwidth information, for DMRS determines a transmission bandwidth according to transmission.

20. base stations as claimed in claim 17, it is characterized in that, if community corresponding to the reference signal of bandwidth information has multiple to need UE to know, then the control module transmission bandwidth of selecting a system bandwidth to be defined as corresponding to this reference signal from the system bandwidth configuration of the plurality of community.

21. base stations as claimed in claim 17, is characterized in that, control module foundation needs the system bandwidth to the community of UE transmitting downlink data, for downlink data determines a transmission bandwidth.

22. base stations as claimed in claim 21, it is characterized in that, if need the community to UE transmitting downlink data to have multiple, then control module selection system bandwidth from the system bandwidth configuration of the plurality of community is defined as the transmission bandwidth corresponding to corresponding downlink data.

23. base stations as claimed in claim 17, is characterized in that, the indication information of transmission bandwidth is the value of transmission bandwidth; Interface module sends the value of the transmission bandwidth determined to described UE by high-level signaling; Or

The indication information of transmission bandwidth is the index of the value of transmission bandwidth; Interface module sends the index of the value of the transmission bandwidth determined to described UE by high-level signaling; Or

The indication information of bandwidth is the index of the value of transmission bandwidth; The system bandwidth of multiple communities of multipoint cooperative is sent to UE by high-level signaling by interface module; And by physical downlink control channel PDCCH signaling, the index of the transmission bandwidth determined is sent to UE.

24. base stations as claimed in claim 17, it is characterized in that, reference signal is DMRS; Control module is according to the transmission bandwidth determined for reference signal, and according to the physical resource shared by downlink data transmission, determine the sequence of the physical resource that DMRS need take and generation DMRS, and indicate interface module on the described physical resource taken, send the sequence of the DMRS of generation.

25. base stations as claimed in claim 17, it is characterized in that, the indication information of this physical resource is sent to UE by descending DCI by interface module.

26. 1 kinds of UE, is characterized in that, comprising:

Interface module, for receiving the indication information of the transmission bandwidth corresponding with downlink data in multiple communities of multipoint cooperative or reference signal that base station sends; Wherein, base station is to send the transmission bandwidth of system bandwidth as corresponding downlink reference signal/downlink data of the community of corresponding downlink reference signal/downlink data, and downlink reference signal/downlink data represents downlink reference signal or downlink data or downlink reference signal and downlink data; Described transmission bandwidth is the system bandwidth that base station is selected from multiple communities of described multipoint cooperative according to user scheduling situation;

For downlink data, control module, for the transmission bandwidth indicated by indication information, determines the physical resource shared by downlink data, the physical resource determined carries out Data Detection; Or

For reference signal, control module, for the transmission bandwidth indicated by indication information, determines the physical resource shared by downlink data, the physical resource determined carries out AF panel; Or

For reference signal, control module, for the transmission bandwidth indicated by indication information, determines the sequence of physical resource shared by downlink reference signal and reference signal, the physical resource determined carries out channel estimating according to corresponding sequence.

27. UE as claimed in claim 26, is characterized in that, reference signal comprise in CRS, DMRS, the CSI-RS of zero energy and the CSI-RS of non-zero power one or more.

28. UE as claimed in claim 26, is characterized in that, the indication information of transmission bandwidth is the value of transmission bandwidth; Interface module receives the value of the transmission bandwidth that base station sends to described UE by high-level signaling; Or

The indication information of transmission bandwidth is the index of the value of transmission bandwidth; Interface module receives the index of the value of the transmission bandwidth that base station sends to described UE by high-level signaling; Or

The indication information of bandwidth is the index of the value of transmission bandwidth; Interface module receives the system bandwidth of multiple communities of the multipoint cooperative that base station sends by high-level signaling; And pass through the index that physical downlink control channel PDCCH signaling receives the value of the transmission bandwidth that base station sends.

29. UE as claimed in claim 26, it is characterized in that, reference signal is DMRS; The transmission bandwidth that the downlink reference signal of control module indicated by indication information is corresponding, and according to the data resource position indication information that base station sends, obtain the physical resource that in this bandwidth, corresponding downlink reference signal takies.

30. UE as claimed in claim 29, is characterized in that the transmission bandwidth that the reference signal of control module indicated by indication information is corresponding determines the length of the sequence of this reference signal, and then obtain the sequence of this reference signal; Or

The transmission bandwidth that the downlink reference signal of control module indicated by indication information is corresponding and the physical resource that this downlink reference signal takies, obtain the sequence of this reference signal.

31. UE as claimed in claim 26, it is characterized in that, the transmission bandwidth that the downlink data of control module indicated by indication information is corresponding, in conjunction with the resource information indicated by the resource instructions field in the DCI that base station sends, obtains the physical resource shared by downlink data.

32. UE as claimed in claim 26, is characterized in that, the physical resource that control module takies at the downlink reference signal determined carries out PDSCH muting operation; Or

The physical resource that control module takies at the downlink reference signal determined carries out interferometry operation.