CN102045728A - Method for allocating reference signals and base station - Google Patents

Abstract

The embodiment of the invention provides a method for allocating reference signals, comprising the following steps of: generating a first reference signal for first user equipment by a base station, wherein the first reference signal is used for carrying out channel estimation by the first user equipment (UE) and corresponds to a first cell, and the first reference signal is the same with a reference signal generated for the first user equipment by a base station corresponding to other cells providing services for the first user equipment and other cells include cells except the first cell in all cells providing services for the first user equipment; and sending the first reference signal to the first user equipment by the base station. Therefore, not only are the reference signals allocated for the UE but also the interference is effectively suppressed, and the channel estimation performance of the UE is increased.

Description

The method of assigned references signal and base station

Technical field

The present invention relates to wireless communication technology, relate in particular to method and the base station of assigned references signal (RS, Reference Signal).

Background technology

In existing wireless communication system, the base station need be UE assigned references signal before subscriber equipment (UE, User Equipment) sends data.The base station is called NodeB in wireless communication systems such as 3G, be called eNodeB in the wireless communication system of Long Term Evolution evolution such as (LTE, Long Term Evolution).The base station is after UE generates reference signal, reference signal to be become wireless signal with the data-modulated that need send to UE, and wireless signal is issued UE.After UE receives wireless signal, use the data in the demodulation reference signal wireless signal in the wireless signal.At present, for example senior Long Term Evolution (LTE-A, Long Term Evolution Advanced) etc. wireless communication system has used cooperative multipoint transmission (CoMP, Coordinated Multi-point Transmission) technology, for ease of hereinafter describing, will use the wireless communication system of CoMP technology to be called the CoMP system here.In the CoMP system, a plurality of sub-districts can that is to say that a UE can obtain the service that a plurality of sub-districts provide simultaneously simultaneously for same UE provides service.

The present inventor finds after scrutinizing prior art, the technical scheme of the assigned references signal of prior art only is applicable to that a sub-district provides the scene of service for a UE, and no matter at single sub-district multi-user's multiple-input and multiple-output (MU-MIMO, Multi User-Multiple Input Multiple Output) still be under the multi-user's multiple-input and multiple-output situation of many sub-districts, the technical scheme that does not also have at present suitable assigned references signal, reference signal-to-interference can not be inhibited, and the channel estimating performance of UE can reduce.

Summary of the invention

The embodiment of the invention provides a kind of method and a kind of base station of assigned references signal, in order to suppress reference signal-to-interference, improves channel estimating performance.

For this reason, the embodiment of the invention provides a kind of method of assigned references signal, comprise: the base station is that the generation of first subscriber equipment is used for first reference signal that described first subscriber equipment carries out channel estimating and corresponding first sub-district, wherein, described first reference signal be that the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously, described other sub-districts are to provide the sub-district except that described first sub-district in all sub-districts of service simultaneously for described first subscriber equipment; Described base station sends to described first subscriber equipment with described first reference signal.

The embodiment of the invention also provides a kind of base station, comprise: first generation unit, be used to first subscriber equipment to generate and be used for first reference signal that described first subscriber equipment carries out channel estimating and corresponding first sub-district, wherein, described first reference signal be that the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously, described other sub-districts are to provide the sub-district except that described first sub-district in all sub-districts of service simultaneously for described first subscriber equipment; Transmitting element is used to obtain first reference signal that described first generation unit generates, and described first reference signal is sent to described first subscriber equipment.

The embodiment of the invention also provides a kind of method and a kind of base station of assigned references signal, comprise: the base station is that a UE generates and to be used for first reference signal that a described UE carries out channel estimating, and makes the value on all RE in each pilot blocks that the second layer sequence of described first reference signal takies on running time-frequency resource all identical; Described base station sends to a described UE with described first reference signal.

The embodiment of the invention also provides a kind of base station, comprise: first generation unit, be used to a UE to generate and be used for first reference signal that a described UE carries out channel estimating, and make the value on all RE in each pilot blocks that the second layer sequence of described first reference signal takies on running time-frequency resource all identical; Transmitting element is used for described first reference signal is sent to a described UE.

The embodiment of the invention provides a kind of method and a kind of base station of assigned references signal again, comprise: the base station is that UE generation is used for first reference signal that a described UE carries out channel estimating, wherein, the second layer sequence of first reference signal and base station are that to share the second layer sequence of the reference signal that the UE of identical running time-frequency resource generates identical with a UE, and the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal and base station are for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of reference signal of UE generation of identical running time-frequency resource corresponding identical with a UE; Described base station sends to a described UE with described first reference signal.

The embodiment of the invention provides a kind of base station, comprise: first generation unit, be used to a UE to generate and be used for first reference signal that a described UE carries out channel estimating, wherein, the second layer sequence of first reference signal and base station are that to share the second layer sequence of the reference signal that the UE of identical running time-frequency resource generates identical with a UE, and the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal and base station are for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of reference signal of UE generation of identical running time-frequency resource corresponding identical with a UE; Transmitting element is used for described first reference signal is sent to a described UE.

By the method and the base station of above-mentioned assigned references signal, the base station can be under different scenes the assigned references signal, effectively suppress to disturb, improve the channel estimating performance of UE.

Description of drawings

Fig. 1 is the flow chart of method of a kind of assigned references signal of the embodiment of the invention;

Fig. 2 A is the pattern schematic diagram of sequence on identical running time-frequency resource of sub-district 1, sub-district 2 and the sub-district 3 corresponding reference signals of the embodiment of the invention;

Fig. 2 B is the pattern schematic diagram of sequence on identical running time-frequency resource of the reference signal that generates for UE1 and UE2 of the embodiment of the invention;

Fig. 3 is the logical construction schematic diagram of a kind of base station of the embodiment of the invention;

Fig. 4 is the flow chart of method of the another kind of assigned references signal of the embodiment of the invention;

Fig. 5 is the pattern schematic diagram of sequence on running time-frequency resource of the reference signal of UE generation for the embodiment of the invention;

Fig. 6 is the logical construction schematic diagram of the another kind of base station of the embodiment of the invention;

Fig. 7 is the flow chart of method of another assigned references signal of the embodiment of the invention;

Fig. 8 is the logical construction schematic diagram of another base station of the embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

The embodiment of the invention goes for having used cooperative multipoint transmission (CoMP, CoordinatedMulti-point Transmission) wireless communication system of technology, for example senior Long Term Evolution wireless communication systems such as (LTE-A, Long Term Evolution Advanced).Specifically, relate to a plurality of sub-districts and go for MU-MIMO transmission mode in the CoMP system for a plurality of UE that share identical running time-frequency resource provide the technical scheme of service simultaneously, relate to a plurality of sub-districts and go for single user's multiple-input and multiple-output (SU-MIMO, Single User-Multiple InputMultiple Output) for a UE provides the technical scheme of service simultaneously.Some CoMP system comprises base station and a plurality of access point (AP, Access Point).Base station can corresponding sub-district, also can corresponding a plurality of sub-districts.An AP can dispose one or more antenna elements.A plurality of AP can disperse on the geographical position and be connected with the base station, and a plurality of AP can be connected with same base station, also can connect with different base stations.A plurality of AP can cooperate and transmit and receive the data of UE.An AP can comprise one or more sub-district.A plurality of AP also can constitute a sub-district jointly.In addition, single sub-district is that service is provided also is a kind of natural logic expansion of CoMP to a plurality of UE (being the MU-MIMO transmission mode) that share identical running time-frequency resource.The embodiment of the invention also goes for the scene that single sub-district is a plurality of UE services of MU-MIMO transmission mode simultaneously.

In some document, reference signal is called pilot resources.The reference signal that the base station sends to UE mainly is meant the sequence and the pattern of sequence on running time-frequency resource of reference signal, the running time-frequency resource here is meant the resource that use the base station when UE sends data, arrangement position and arrangement mode when pattern refers to the reference signal transmission on running time-frequency resource.Wherein, reference signal can comprise two sequence of layer, and the ground floor sequence is an orthogonal sequence, and second layer sequence is the sequence except that orthogonal sequence, for example pseudorandom (PN, Pseudo Noise) sequence.

In some communication standards, reference signal can be divided into cell-specific (cell-specific) reference signal and two kinds of forms of UE special use (UE-specific) reference signal.Cell-specific (cell-specific) reference signal is meant in the reference signal total system bandwidth transmission of sub-district, that can be discerned and receive by all UE in the sub-district.UE special use (UE-specific) reference signal is meant the reference signal in the resource transmission of its downstream data channel of transmission of UE correspondence, and it is by corresponding UE identification and reception.Under some transmission mode, the base station is a cell special reference to the reference signal that UE sends; Under some transmission mode, the base station is the UE DRS (Dedicated Reference Signal) to the reference signal that UE sends.

The sequence of cell special reference can be defined as:

$r_{l,n_s}\left(m\right)=\frac{1}{\sqrt{2}}(1-2\&CenterDot;c\left(2m\right))+\mathrm{<figure-callout\; id="1"\; label="j"\; filenames="H2009101106252E0000012.png,H2009101106252E0000021.png"\; state="\{\{state\}\}">j</figure-callout>}\frac{1}{\sqrt{2}}(1-2\&CenterDot;c(2m+1)),$ $m=\mathrm{0,1},...,2N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1$

Wherein, n _sBe a timeslot number in the radio frames, l is OFDM (OFDM, an Orthogonal Frequency Division Multiplexing) symbol sequence number in the time slot, generates the generator basis of PN sequence c (i) Initialization.Wherein, Be cell ID (ID).

The sequence of UE DRS (Dedicated Reference Signal) can be defined as:

$r\left(m\right)=\frac{1}{\sqrt{2}}(1-2\&CenterDot;c\left(2m\right))+\mathrm{<figure-callout\; id="1"\; label="j"\; filenames="H2009101106252E0000012.png,H2009101106252E0000021.png"\; state="\{\{state\}\}">j</figure-callout>}\frac{1}{\sqrt{2}}(1-2\&CenterDot;c(2m+1)),$ $m=\mathrm{0,1},...,12N_{\mathrm{RB}}^{\mathrm{PDSCH}}-1$

Wherein,

The bandwidth that expression is used, the generator basis of generation pseudo random sequence c (i)

Initialization, wherein,

Be cell ID, n _RNTIBe Radio Network Temporary Identifier (Radio network temporary identifier).In embodiments of the present invention, for convenience of description, Radio Network Temporary Identifier is called customer equipment identification (UE-ID).

Method to a kind of assigned references signal of the embodiment of the invention describes below.As shown in Figure 1, this method comprises:

S101: the base station is that first subscriber equipment (UE) generation is used for first reference signal that this first subscriber equipment carries out channel estimating and corresponding first sub-district, wherein, first reference signal with provide corresponding base station, other sub-districts of service identical for this first subscriber equipment simultaneously for the reference signal that this first subscriber equipment generates, promptly first reference signal with simultaneously for this first subscriber equipment provides at least one attribute of the reference signal that corresponding base station, other sub-districts of service generates for this first subscriber equipment identical, as pattern or sequence etc.

Above-mentioned other sub-districts are meant to described first subscriber equipment provides the sub-district except that described first sub-district in all sub-districts of service simultaneously.

S102: the base station sends to first subscriber equipment with first reference signal.

Need to prove that the base station need be used for the reference signal that UE carries out channel estimating for UE generates before having the data of practical significance to the UE transmission.Above-mentioned data with practical significance can comprise user service datas such as video, audio frequency or picture.

Can be to concern one to one between reference signal and the sub-district.For example, suppose that sub-district 1, sub-district 2 and sub-district 3 can provide service for UE1 simultaneously, sub-district 1 and sub-district 2 respective base station 1, sub-district 3 respective base station 2, base station 1 can generate two reference signals of difference respective cell 1 and sub-district 2 for UE1 so, base station 2 for ease of hereinafter describing, is called embodiment 1 with this example for the reference signal that UE1 generates a respective cell 3 here.

In embodiment 1, if base station 1 is considered as base station among the S101, UE1 is considered as a UE among the S101, sub-district 1 is considered as first sub-district, for providing other sub-districts of service, a UE is meant sub-district 2 and sub-district 3 among the embodiment 1 in the time of so among the S101, for providing the base station of other sub-district correspondences of service, a UE is meant base station 1 (base stations of sub-district 2 correspondences) and base station 2 (base stations of sub-district 3 correspondences) in the time of among the S101, further, sub-district 1 corresponding reference signal, sub-district 2 corresponding reference signals are identical with sub-district 3 corresponding reference signals.

Identical one of the following situation that comprises at least of reference signal: the sequence of reference signal is identical; The pattern of the sequence of reference signal on running time-frequency resource is identical; The value correspondence of the sequence of reference signal on the RE that takies on the running time-frequency resource (Resource Element Resource Unit) is identical.So, for S101, first reference signal be identical one of following situation that comprises at least of reference signal that a UE generates for a UE provides corresponding base station, other sub-districts of service simultaneously: the sequence of first reference signal be that the sequence of reference signal of UE generation is identical for a UE provides corresponding base station, other sub-districts of service simultaneously; The sequence of first reference signal the pattern on the running time-frequency resource be that the pattern of sequence on running time-frequency resource of the reference signal that generates of a UE is identical for a UE provides corresponding base station, other sub-districts of service simultaneously; The sequence of first reference signal the value on the RE that takies on the running time-frequency resource be that the value of sequence on the RE that takies on the running time-frequency resource of the reference signal that generates of a UE is corresponding identical for a UE provides corresponding base station, other sub-districts of service simultaneously.Need to prove that above-mentioned situation does not need simultaneously to satisfy, the needs that can disturb according to inhibition in various degree, select to satisfy above-mentioned one or more situations, such as, then can better suppress to disturb if satisfy above three kinds of situations simultaneously, improve channel estimating performance.

With embodiment 1 is example, and the sequence of difference respective cell 1, sub-district 2 and the reference signal of sub-district 3 that generates for UE1 can be identical, and the pattern of the sequence of reference signal on identical running time-frequency resource also can be identical.The pattern of sequence on running time-frequency resource of supposing each sub-district corresponding reference signal is shown in Fig. 2 A, and the RE of numbering 1,2,3,4 is the shared RE of reference signal.To be numbered 100 pilot blocks, to be numbered 200 pilot blocks and to be numbered 300 pilot blocks is example, these 3 pilot blocks are corresponding pilot blocks, the value that is numbered 1 RE in these 3 pilot blocks can be identical, in like manner, the value that is numbered 2 RE in these 3 pilot blocks can be identical, the value that is numbered 3 RE in these 3 pilot blocks can be identical, and the value that is numbered 4 RE in these 3 pilot blocks can be identical.Other corresponding pilot blocks by that analogy.

The base station can by with the corresponding base station negotiate in other sub-districts that service is provided for this first subscriber equipment simultaneously, determine to generate cell ID and/or customer equipment identification that above-mentioned first reference signal is used, thereby reach first reference signal and provide the reference signal identical purpose of corresponding base station, other sub-districts of service for this first subscriber equipment simultaneously for this first subscriber equipment generation.

The process of above-mentioned negotiation can comprise: the cell ID and/or the customer equipment identification of use determined in the base station of the sub-district correspondence under the UE, is notified to the base station that other sub-district correspondences of service are provided simultaneously for a UE; Perhaps by one independently reference signal resource generate and the functional unit that distributes is determined the cell ID and/or the customer equipment identification that use to be notified to the base station that all sub-district correspondences of service are provided simultaneously for a UE; Perhaps the network planning in advance determines that certain sub-district in the CoMP set of cells is the main plot, by definite cell ID and/or the customer equipment identification that uses in the base station of this main plot correspondence, is notified to all sub-districts that service is provided simultaneously for a UE.

For make win reference signal with provide corresponding base station, other sub-districts of service identical for this first subscriber equipment simultaneously for the reference signal that this first subscriber equipment generates, the result of above-mentioned negotiation can comprise: if the base station uses cell ID to generate first reference signal, employed cell ID employed cell ID when providing corresponding base station, other sub-districts of service to be UE generation reference signal for a UE simultaneously is identical when then making the base station generate first reference signal; If the base station uses customer equipment identification to generate first reference signal, employed customer equipment identification can be identical when providing corresponding base station, other sub-districts of service to be UE generation reference signal for a UE simultaneously for employed customer equipment identification when then making the base station generate first reference signal; If the base station uses cell ID and customer equipment identification to generate first reference signal simultaneously, when then making the base station generate first reference signal employed cell ID and customer equipment identification with simultaneously for a UE provide corresponding base station, other sub-districts of service be a UE when generating reference signal employed cell ID identical with customer equipment identification.

When a UE is in multi-user multiple input multiple output mode, if the base station need use customer equipment identification to generate first reference signal, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when then the base station generated first reference signal, or be paired into the customer equipment identification of any one UE among the UE of multi-user's multiple-input and multiple-output, perhaps be specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode.When a UE is in single user's MIMO mode, employed customer equipment identification was that a UE affiliated subdistrict is the conventional customer equipment identification that a UE distributes when the base station generated first reference signal, perhaps was specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode.

For example, when the base station generates first reference signal employed cell ID with simultaneously for a UE provide the base station of other sub-district correspondences of service be a UE when generating reference signal employed cell ID can be identical virtual cell ID, the sign of corresponding any one sub-district not just.

When more for example, the base station generates first reference signal employed cell ID and when providing the base station of other sub-district correspondences of service to generate reference signal for a UE simultaneously for a UE employed cell ID can be the cell ID that any one sub-district in all sub-districts of service is provided for a UE simultaneously.

Again for example, if need use customer equipment identification when the base station generates reference signal, when then the base station generates first reference signal employed customer equipment identification and when providing the base station of other sub-district correspondences of service to be UE generation reference signal for a UE simultaneously employed customer equipment identification can be identical.

Suppose the ID1 that is designated of sub-district 1, its subscriber equipment to UE1 is masked as UE-ID11, sub-district 2 be designated ID2, its subscriber equipment to UE1 is masked as UE-ID21, sub-district 3 be designated ID3, its subscriber equipment to UE1 is masked as UE-ID31.In addition, suppose that UE1 is assigned with a customer equipment identification UE-IDA1 under the multi-cell cooperating transmission mode, so, base station 1 employed cell ID when generating two reference signals of respective cell 1, sub-district 2 respectively for UE1 can be virtual cell ID ID0, and this ID0 can not correspond to sub-district 1, sub-district 2 or sub-district 3.If use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1.Base station 2 employed cell ID when generating the reference signal of respective cell 3 for UE1 also is ID0.If use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1, identical the getting final product of customer equipment identification of using when generating sub-district 1 with 2 internal reference signals with base station 1.Base station 1 generate for UE1 respective cell 1, sub-district 2 respectively two with reference to the time employed cell ID also can be ID1, if use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1.Correspondingly, if base station 2 also ID1 of employed cell ID when generating the reference signal of respective cell 3 for UE1.If use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1, identical the getting final product of customer equipment identification of using when generating sub-district 1 with 2 internal reference signals with base station 1.In like manner, base station 1 generate for UE1 respective cell 1, sub-district 2 respectively two with reference to the time employed cell ID also can be ID2, if use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1.Correspondingly, if base station 2 also ID2 of employed cell ID when generating the reference signal of respective cell 3 for UE1.If use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1, identical the getting final product of customer equipment identification of using when generating sub-district 1 with 2 internal reference signals with base station 1.In like manner, base station 1 generate for UE1 respective cell 1, sub-district 2 respectively two with reference to the time employed cell ID also can be ID3, if use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1.Correspondingly, if base station 2 also ID3 of employed cell ID when generating the reference signal of respective cell 3 for UE1.If use customer equipment identification when generating reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31 or UE-IDA1, identical the getting final product of customer equipment identification of using when generating sub-district 1 with 2 internal reference signals with base station 1.

In actual applications, one or more sub-districts can provide service for a plurality of UE that share identical running time-frequency resource simultaneously.In this case, the base station mentioned of S101 can also be a UE and generate reference signal with UE that a UE shares identical running time-frequency resource with the base station negotiate of other sub-district correspondences.

Wherein, the corresponding base station in the running time-frequency resource that takies of first reference signal and base station and other sub-districts is for to share the running time-frequency resource that reference signal that the UE of identical running time-frequency resource generates takies identical with a UE; And the corresponding base station in the ground floor sequence of first reference signal and base station and other sub-districts be that to share the ground floor sequence of reference signal of UE generation of identical running time-frequency resource different with a UE; And the corresponding base station in the second layer sequence of first reference signal and base station and other sub-districts be that to share the second layer sequence of UE generation reference signal of identical running time-frequency resource identical with a UE; The ground floor sequence is an orthogonal sequence, and second layer sequence is the sequence except that orthogonal sequence.

It is identical that the corresponding base station in the second layer sequence of first reference signal and base station and other sub-districts be that the UE that shares identical running time-frequency resource with a UE generates the second layer sequence of reference signal, specifically can comprise: the second layer sequence of first reference signal base station corresponding in the pattern on the running time-frequency resource and base station and other sub-districts is identical for the pattern of second layer sequence on running time-frequency resource of the reference signal of the UE generation of the running time-frequency resource shared identical with a UE; And the corresponding base station in the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal and base station and other sub-districts is for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of the reference signal that the UE of identical running time-frequency resource generates corresponding identical with a UE.

The base station of the base station that above-mentioned S101 mentions and other sub-district correspondences can be a UE and generate reference signal with UE that a UE shares identical running time-frequency resource through consultation:

Suppose that a UE is UE1, the UE that shares identical running time-frequency resource with a UE is UE2, if the base station uses cell ID to be that UE1 and UE2 generate second layer sequence, then for UE1 and UE2 provide simultaneously the base station negotiate of all sub-district correspondences of service make the base station be UE1 when generating second layer sequence employed cell ID employed cell ID with the time for UE2 generation second layer sequence identical; If the base station uses customer equipment identification to be that UE1 and UE2 generate second layer sequence, then for UE1 and UE2 provide simultaneously the base station negotiate of all sub-district correspondences of service make the base station be UE1 when generating second layer sequence employed subscriber equipment employed customer equipment identification with the time for UE2 generation second layer sequence identical; If it is that UE1 and UE2 generate second layer sequence that the base station is used cell ID and customer equipment identification simultaneously, then for UE1 and UE2 provide simultaneously the base station negotiate of all sub-district correspondences of service make the base station be UE1 when generating second layer sequence employed cell ID and customer equipment identification employed cell ID with for the UE2 generation second layer sequence time corresponding identical with the customer equipment identification difference.

Above-mentioned negotiation method can comprise:

For UE1 and UE2 provide the base station negotiate of all sub-district correspondences of service simultaneously, determine the cell ID and/or the customer equipment identification that use by the base station of the sub-district correspondence under UE1 or the UE2, be notified to all sub-districts that service is provided simultaneously for UE1 and UE2; Perhaps by one independently reference signal resource generate and the functional unit that distributes is determined the cell ID and/or the customer equipment identification that use, be notified to all sub-districts that service is provided simultaneously for UE1 and UE2; Perhaps the network planning in advance determines that certain sub-district in the CoMP set of cells is the main plot, the base station negotiate of all sub-district correspondences of service is provided simultaneously for UE1 and UE2, determine the cell ID and/or the customer equipment identification that use by the base station of main plot correspondence, be notified to all sub-districts that service is provided simultaneously for UE1 and UE2.

Be that example describes with UE1, UE2 only below, by that analogy, said method can also be applicable to the scene of the subscriber equipment that has a plurality of and the shared video resource of UE1, does not repeat them here.

Application to method shown in Figure 1 is illustrated below:

Application examples one:

Suppose sub-district 1, sub-district 2 and sub-district 3 except that providing the service for UE1 simultaneously, also simultaneously for providing service with UE2 that UE1 shares identical running time-frequency resource, so, 3 reference signals that generate for UE1 can be identical with second layer sequence for 3 reference signals (distinguishing respective cell 1, sub-district 2 and sub-district 3) of UE2 generation.The second layer sequence of 3 reference signals that generate for UE1 is identical with the second layer sequence (respective cell 1, sub-district 2 and sub-district 3 respectively) of 3 reference signals that generate for UE2 refer to into the reference signal of UE1 generation and for the pattern of sequence on running time-frequency resource of the reference signal of UE2 generation identical, the reference signal that generates for UE1 is identical with the second layer sequence of the sequence of the reference signal that generates for UE2, ground floor sequence difference.

The pattern of sequence on running time-frequency resource that is assumed to be the reference signal that UE1 and UE2 generate is shown in Fig. 2 B, the RE of numbering 1,2,3,4 is the shared RE of reference signal, by Fig. 2 B as can be known, the running time-frequency resource that takies of the reference signal that generates for UE1 is identical with the running time-frequency resource that reference signal for the UE2 generation takies.If the running time-frequency resource that the reference signal that generates for UE1 takies is inequality with the running time-frequency resource that the reference signal that generates for UE2 takies, the RE that takies of the reference signal that generates for UE1 and the RE that takies for the reference signal of UE2 generation are just inequality so.

Again for instance, the second layer sequence of 3 reference signals that generate for UE1 can be identical with the second layer sequence of 3 reference signals that generate for UE2, for the second layer sequence of 3 reference signals of UE1 generation can be identical at pattern on the running time-frequency resource and the pattern of second layer sequence on identical running time-frequency resource for 3 reference signals of UE2 generation.Still the pattern of sequence on running time-frequency resource that is assumed to be the reference signal that UE1 and UE2 generate is shown in Fig. 2 B, and the RE of numbering 1,2,3,4 is the shared RE of reference signal.To be numbered 100 pilot blocks and to be numbered 200 pilot blocks is example, these two pilot blocks are corresponding pilot blocks, the value that is numbered the corresponding second layer sequence among 1 the RE in these two pilot blocks can be identical, in like manner, the value that is numbered the corresponding second layer sequence among 2 the RE in these two pilot blocks can be identical, the value that is numbered the corresponding second layer sequence among 3 the RE in these two pilot blocks can be identical, and the value that is numbered the corresponding second layer sequence among 4 the RE in these two pilot blocks can be identical.Other corresponding pilot blocks by that analogy.In actual applications, identical with the second layer sequence of the sequence of the reference signal that generates for UE2 for assurance for the second layer sequence of the reference signal of UE1 generation.The second layer sequence that provides the base station of all sub-district correspondences of service can use identical cell ID and/or customer equipment identification to generate for UE1 as UE1.Simultaneously, can use identical cell ID and/or customer equipment identification to generate the second layer sequence of reference signal for UE2 provides the base station of all sub-district correspondences of service as UE2, and the cell ID that uses can be with the second layer sequence that generates reference signal for UE1 time of this cell ID and/or customer equipment identification and/or customer equipment identification correspondence is identical respectively.

Suppose the ID1 that is designated of sub-district 1, its subscriber equipment to UE1 is masked as UE-ID11, and its subscriber equipment to UE2 is masked as UE-ID12.Sub-district 2 be designated ID2, its subscriber equipment to UE1 is masked as UE-ID21, its subscriber equipment to UE2 is masked as UE-ID22.Sub-district 3 be designated ID3, its subscriber equipment to UE1 is masked as UE-ID31, its subscriber equipment to UE2 is masked as UE-ID32.In addition, suppose that UE1 is assigned with a customer equipment identification UE-IDA1 under the multi-cell cooperating transmission mode, suppose that UE2 is assigned with a customer equipment identification UE-IDA2 under the multi-cell cooperating transmission mode, so, if base station 1 be a UE1 and UE2 use cell ID when generating the second layer sequence of two reference signals of respective cell 1, sub-district 2 respectively, then employed cell ID can be ID0 (virtual cell ID), ID1 or ID2.If use customer equipment identification during the second layer sequence of generation reference signal, then customer equipment identification can be UE-ID11, UE-ID21, UE-ID31, UE-IDA1, UE-ID12, UE-ID22, UE-ID32 or UE-IDA2.Accordingly, base station 2 employed cell ID when the second layer sequence of the reference signal that generates respective cell 3 for UE1 and UE2 also can be ID0, ID1 or ID2, identical the getting final product of cell ID of using when generating the reference signal second layer sequence of UE1 in sub-district 1 and 2 with base station 1; Base station 2 employed customer equipment identification when the second layer sequence of the reference signal that generates respective cell 3 for UE1 and UE2 can be UE-ID11, UE-ID21, UE-ID31, UE-IDA1, UE-ID12, UE-ID22, UE-ID32 or UE-IDA2, identical the getting final product of customer equipment identification of using when generating the reference signal second layer sequence of UE1 in sub-district 1 and 2 with base station 1.

Application examples two:

Be example for a plurality of UE that share identical running time-frequency resource provide the scene of service simultaneously with a sub-district below.

, can use above-mentioned similar scheme to carry out reference signal and distribute simultaneously for a plurality of UE that share identical running time-frequency resource provide under the scene of service (being single sub-district MU-MIMO) in single sub-district.Need be a plurality of sub-districts logical extension single sub-district MU-MIMO only.Because a plurality of UE are from same sub-district, then cell ID has guaranteed unanimity, when using cell ID and/or customer equipment identification to be UE generation reference signal in the base station, only needs retrain above-mentioned customer equipment identification.For example, when the base station generates first reference signal, if a UE is in multi-user multiple input multiple output mode, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when then the base station generated described first reference signal, or be paired into the customer equipment identification of any one subscriber equipment in the subscriber equipment of multi-user's multiple-input and multiple-output, perhaps be specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode; If a UE is in single user's MIMO mode, employed customer equipment identification was that a UE affiliated subdistrict is the conventional customer equipment identification that a UE distributes when the base station generated described first reference signal, perhaps was specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode.The base station can be used one of them generation reference signal of above-mentioned cell ID and customer equipment identification separately, also can use both to generate reference signal simultaneously.

Suppose sub-district 1 except that simultaneously for UE1 provides the service, also simultaneously for providing service with UE2 that UE1 shares identical running time-frequency resource, so, the reference signal that generates for UE1 can be identical with second layer sequence for the reference signal of UE2 generation.The second layer sequence of the reference signal that generates for UE1 is identical with the second layer sequence of the reference signal that generates for UE2 refer to into the reference signal of UE1 generation and for the pattern of sequence on running time-frequency resource of the reference signal of UE2 generation identical, and the reference signal that generates for UE1 is identical with the second layer sequence of the sequence of the reference signal that generates for UE2, and ground floor sequence difference.

In actual applications, identical with the second layer sequence of the reference signal that generates for UE2 for assurance for the second layer sequence of the reference signal of UE1 generation.Employed cell ID can be identical when generating second layer sequence for UE1 with UE2.Simultaneously, if use customer equipment identification when generating the second layer sequence of reference signal, employed customer equipment identification can be identical with for the second layer sequence of UE2 generation reference signal the time for employed customer equipment identification when then generating the second layer sequence of reference signal for UE1.That is, when the base station uses cell ID to generate second layer sequence as UE1 and UE2 separately, the base station be UE1 when generating second layer sequence employed cell ID employed cell ID can be identical with for the UE2 generation second layer sequence time; When the base station uses customer equipment identification to generate second layer sequence as UE1 and UE2 separately, the base station be UE1 when generating second layer sequence employed customer equipment identification employed customer equipment identification can be identical with for the UE2 generation second layer sequence time; When the base station uses cell ID and customer equipment identification to generate second layer sequence as UE1 and UE2 simultaneously, the base station be UE1 when generating second layer sequence employed cell ID and customer equipment identification employed cell ID and customer equipment identification can be identical with for the UE2 generation second layer sequence time.

Illustrate: suppose the ID1 that is designated of sub-district 1, its subscriber equipment to UE1 is masked as UE-ID11, and its subscriber equipment to UE2 is masked as UE-ID12.In addition, suppose that UE1 is assigned with the customer equipment identification UE-IDA1 under multi-user's transmission mode, suppose that UE2 is assigned with a customer equipment identification UE-IDA2 under multi-user's transmission mode.So, base station 1 employed cell ID when being the second layer sequence of UE1 and UE2 generation reference signal can be ID1, if use customer equipment identification during the second layer sequence of generation reference signal, then customer equipment identification can be UE-ID11, UE-ID12, UE-IDA1 or UE-IDA2.

In actual applications, before generating reference signal, base station and be UE generation reference signal for a UE provides the base station of other sub-district correspondences of service to consult simultaneously.In addition, the base station with also can consult to generating reference signal for a UE provides the base station of other sub-district correspondences of service simultaneously with UE that a UE shares identical running time-frequency resource.

In actual applications, the reference signal that the base station provides for a UE may be dynamic change, can determine reference signal accurately for guaranteeing a UE, generates after the reference signal reference signal that the base station can will send to the UE informing base station.For example, a base station and a UE store the information of a plurality of reference signals in advance, and the information of reference signal for example comprises numbering or sign, the sequence of reference signal and the pattern of sequence on running time-frequency resource of reference signal etc. of reference signal; The base station can be earlier sends to UE with the numbering of reference signal before generating reference signal for UE, like this, UE just can determine that the base station will send the reference signal of which kind of form.In actual applications, except that the numbering of reference signal, the base station can also send other information that can identify reference signal, and specific implementation can be designed according to actual needs by those skilled in the art.

In actual applications, the base station can be used for the reference signal that UE carries out channel estimating and respective cell for UE generates according to setting in advance when generating reference signal for UE.That is to say that the reference signal of the respective cell that the base station should generate for UE has been specified in setting in advance, the base station generates reference signal according to such being provided with and gets final product.

The front was mentioned, and first reference signal is used for a UE and carries out the channel estimating use, so the base station can together send to a UE with first reference signal and the data that need issue a UE.Concrete, the base station can together be modulated to wireless signal with first reference signal and the data that need issue a UE, by eating dishes without rice or wine wireless signal is sent to a UE afterwards.After the one UE receives wireless signal, just can use first reference signal to carry out channel estimating.

The method that provides according to present embodiment, by guaranteeing first reference signal and providing corresponding base station, other sub-districts of service identical for this first subscriber equipment simultaneously for the reference signal that this first subscriber equipment generates, make under the single user's in many sub-districts scene, many sub-districts strengthen for this user's reference signal stack, thereby effectively suppressed the interference of reference signal, improved channel estimation accuracy; Under the multi-user's scene of many sub-districts, by allowing the corresponding base station in ground floor sequence and the base station of first reference signal and other sub-districts for to share the ground floor sequence of the reference signal that the subscriber equipment of identical running time-frequency resource generates different with first subscriber equipment, and second layer sequence is identical, guaranteed the orthogonality of reference signal, suppress the interference of reference signal, improved channel estimation accuracy.

Application examples three:

In actual applications, the situation of base station to UE transmission data failure may take place.In embodiments of the present invention, after the base station sends to a UE with first reference signal, if the base station is to UE transmission data failure, and the base station need be transmitted data again, the base station need be that a UE generates reference signal once more so, and the reference signal that will generate once more sends to a UE, is that the reference signal that a UE generates once more is called second reference signal with the base station in the embodiment of the invention.

The base station is that a UE is when generating second reference signal, can still use and be a UE employed cell ID and/or identical sign of customer equipment identification when generating reference signal before, that is to say that the cell ID and/or the customer equipment identification that use when the front and back, base station are UE generation reference signal for twice are constant.With embodiment 1 is example, suppose that base station 1 and base station 2 all using ID1 to generate reference signal sometime, suppose again base station 1 by sub-district 1 to UE1 transmission data failure, and base station 1 needs by sub-district 1 to the UE1 data retransmission, at this moment, base station 1 still uses ID1 to generate the reference signal of respective cell 1 as UE1.Again for example, suppose that base station 1 and base station 2 all using UE-ID1 to generate reference signal sometime, suppose again base station 1 by sub-district 1 to UE1 transmission data failure, and base station 1 needs by sub-district 1 to the UE1 data retransmission, at this moment, base station 1 still uses UE-ID1 to generate the reference signal of respective cell 1 as UE1.Above-mentioned cell ID and customer equipment identification can generate reference signal by one of them separately, also can use both to generate reference signal simultaneously.

The base station is that a UE is when generating second reference signal, also can use and be a UE employed cell ID and/or customer equipment identification cell ID and/or customer equipment identification inequality when generating reference signal before, that is to say cell ID and/or the customer equipment identification difference used when the front and back, base station are UE generation reference signal for twice.For example, when the base station was UE generation reference signal once more, the cell ID that can use a UE affiliated subdistrict was that UE generation is used for second reference signal that a UE carries out channel estimating.With embodiment 1 is example, suppose that base station 1 and base station 2 all using virtual sub-district ID to generate reference signal sometime, suppose again base station 1 by sub-district 1 to UE1 transmission data failure, and base station 1 needs by sub-district 1 to the UE1 data retransmission, at this moment, base station 1 can use ID1 to generate the reference signal of respective cell 1 as UE1.Again for example, suppose that base station 1 and base station 2 all using UE-ID1 to generate reference signal sometime, suppose again base station 2 by sub-district 2 to UE1 transmission data failure, and base station 2 needs by sub-district 2 to the UE1 data retransmission, at this moment, the reference signal of using UE-ID2 to generate respective cell 2 as UE1 can be changed in base station 2.Above-mentioned cell ID and customer equipment identification can generate reference signal by one of them separately, also can use both to generate reference signal simultaneously.

The embodiment of the invention also provides a kind of base station, can realize the method for above-mentioned Fig. 1 correspondence.

As shown in Figure 3, this base station comprises: first generation unit 301, be used to first subscriber equipment (UE) to generate and be used for first reference signal that this first subscriber equipment carries out channel estimating and corresponding first sub-district, wherein, for first subscriber equipment provides corresponding base station, other sub-districts of service identical for the reference signal that this first subscriber equipment generates, above-mentioned other sub-districts are to provide the sub-district except that described first sub-district in all sub-districts of service simultaneously for described first subscriber equipment to first reference signal with simultaneously; Transmitting element 302 is used to obtain first reference signal that described first generation unit generates, and described first reference signal is sent to described first subscriber equipment.

Transmitting element 302 can send to UE has the data of practical significance, for example video, audio frequency, picture etc.Transmitting element 302 is before having the data of practical significance to the UE transmission, and first generation unit 301 need be used for the reference signal that UE carries out channel estimating for UE generates.

Above-mentioned first reference signal be that the reference signal that generates of a UE is identical for a UE provides corresponding base station, other sub-districts of service simultaneously, comprise one of following situation at least: the sequence of first reference signal be that the sequence of reference signal of UE generation is identical for a UE provides corresponding base station, other sub-districts of service simultaneously; The sequence of first reference signal the pattern on the running time-frequency resource be that the pattern of sequence on running time-frequency resource of the reference signal that generates of a UE is identical for a UE provides corresponding base station, other sub-districts of service simultaneously; The sequence of first reference signal the value on the RE that takies on the running time-frequency resource be that the value of sequence on the RE that takies on the running time-frequency resource of the reference signal that generates of a UE is corresponding identical for a UE provides corresponding base station, other sub-districts of service simultaneously.

For reaching above-mentioned first reference signal and being the identical purpose of reference signal that a UE generates for a UE provides corresponding base station, other sub-districts of service simultaneously: above-mentioned first generation unit 301 can make that the employed cell ID when providing corresponding base station, other sub-districts of service to be UE generation reference signal for a UE simultaneously of employed cell ID when generating first reference signal is identical with the corresponding base station negotiate in other sub-district; And/or, when generating first reference signal employed customer equipment identification with simultaneously for a UE provide corresponding base station, other sub-districts of service be a UE when generating reference signal employed customer equipment identification identical.

Employed cell ID can be virtual cell ID when first generation unit 301 generated first reference signal, also can be the cell ID that any one sub-district in all sub-districts of service is provided for a UE simultaneously.When first generation unit 301 generates first reference signal, if a UE is in multi-user multiple input multiple output mode, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when then above-mentioned first generation unit 301 generated above-mentioned first reference signal, or be paired into the customer equipment identification of any one subscriber equipment in the subscriber equipment of multi-user's multiple-input and multiple-output, perhaps be specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode; If a UE is in single user's MIMO mode, employed customer equipment identification was that a UE affiliated subdistrict is the conventional customer equipment identification that a UE distributes when above-mentioned first generation unit 301 generated above-mentioned first reference signal, perhaps was specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode.First generation unit 301 can use one of them generation reference signal of above-mentioned cell ID and customer equipment identification separately, also can use both to generate reference signal simultaneously.

As further embodiment of this invention, first generation unit 301 also is used for, and holding consultation with corresponding base station, other sub-districts is that the UE that shares identical running time-frequency resource with a UE generates reference signal, makes:

The corresponding base station in the running time-frequency resource that first reference signal takies and first generation unit 301 and other sub-districts is for to share the running time-frequency resource that reference signal that the UE of identical running time-frequency resource generates takies identical with a UE; And the corresponding base station in the ground floor sequence of first reference signal and first generation unit 301 and other sub-districts be that to share the ground floor sequence of reference signal of UE generation of identical running time-frequency resource different with a UE; And the corresponding base station in the second layer sequence of first reference signal and first generation unit 301 and other sub-districts be that to share the second layer sequence of UE generation reference signal of identical running time-frequency resource identical with first subscriber equipment; The ground floor sequence is an orthogonal sequence, and second layer sequence is the sequence except that orthogonal sequence.

It is identical that the corresponding base station in the second layer sequence of above-mentioned first reference signal and first generation unit 301 and other sub-districts be that the UE that shares identical running time-frequency resource with a UE generates the second layer sequence of reference signal, specifically can comprise: the second layer sequence of first reference signal base station corresponding in the pattern on the running time-frequency resource and first generation unit 301 and other sub-districts is identical for the pattern of second layer sequence on running time-frequency resource of the reference signal of the UE generation of the running time-frequency resource shared identical with a UE; And the corresponding base station in the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal and first generation unit 301 and other sub-districts is for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of the reference signal that the UE of identical running time-frequency resource generates corresponding identical with a UE.

Accordingly, transmitting element 302 also is used for first generation unit 301 is sent to for the reference signal of the subscriber equipment generation of the running time-frequency resource shared identical with first subscriber equipment subscriber equipment of the shared identical running time-frequency resource of described and above-mentioned first subscriber equipment.

As further embodiment of this invention, above-mentioned first generation unit 301 can also be further used for, after transmitting element 302 sends to first subscriber equipment with above-mentioned first reference signal, if the base station is to the first user device transmissions data failure, and the base station need be transmitted data again, then is used for second reference signal that above-mentioned first subscriber equipment carries out channel estimating for above-mentioned first subscriber equipment generates again; Above-mentioned transmitting element 302 also is used for, and this second reference signal is sent to above-mentioned first subscriber equipment.

Above-mentioned base station is used for second reference signal that above-mentioned first subscriber equipment carries out channel estimating and can comprises for above-mentioned first subscriber equipment generates again: employed cell ID and/or customer equipment identification are that described first subscriber equipment generates and is used for second reference signal that described first subscriber equipment carries out channel estimating when generating reference signal for described first subscriber equipment before using; Perhaps also can use with first generation unit 301 be a UE when generating reference signal employed cell ID and/or customer equipment identification cell ID inequality and/or customer equipment identification be that a UE generates and is used for second reference signal that a UE carries out channel estimating, such as, the cell ID that can use the described first subscriber equipment affiliated subdistrict is that described first subscriber equipment generation is used for second reference signal that described first subscriber equipment carries out channel estimating, perhaps also can use current customer equipment identification to generate second reference signal.By that analogy, the method for estimating second reference signal can have multiple, more than just illustrate, should not constitute and limit protection scope of the present invention.

Need to prove that base station shown in Figure 3 is corresponding to the method for assigned references signal shown in Figure 1, so the detailed description of base station shown in Figure 3 can repeat no more referring to the associated description in the method for assigned references signal shown in Figure 1 here.

The base station that present embodiment provides, by guaranteeing first reference signal and providing corresponding base station, other sub-districts of service identical for this first subscriber equipment simultaneously for the reference signal that this first subscriber equipment generates, make under the single user's in many sub-districts scene, many sub-districts strengthen for this user's reference signal stack, thereby effectively suppressed the interference of reference signal, improved channel estimation accuracy; Under the multi-user's scene of many sub-districts, by allowing the corresponding base station in ground floor sequence and the base station of first reference signal and other sub-districts for to share the ground floor sequence of the reference signal that the subscriber equipment of identical running time-frequency resource generates different with first subscriber equipment, and second layer sequence is identical, guaranteed the orthogonality of reference signal, suppress the interference of reference signal, improved channel estimation accuracy.

The embodiment of the invention also provides a kind of method of assigned references signal.As shown in Figure 4, the method for this assigned references signal comprises:

S401: the base station is that a UE generates and to be used for first reference signal that a UE carries out channel estimating, and makes the value on all RE in each pilot blocks that the second layer sequence of first reference signal takies on running time-frequency resource all identical;

S402: the base station sends to a UE with first reference signal.

Suppose the pattern of first reference signal on running time-frequency resource as shown in Figure 5.For the pilot blocks that is numbered 100, be numbered the corresponding second layer sequence on 1 the RE value, be numbered the corresponding second layer sequence on 2 the RE value, be numbered the value of the corresponding second layer sequence on 3 the RE and be numbered the value of the corresponding second layer sequence on 4 the RE identical.In like manner, for any one pilot blocks, the value of the corresponding second layer sequence on all RE wherein is identical.

Need to prove that the value between the pilot blocks can be identical, also can be inequality.Please again referring to Fig. 5, to be numbered 100 pilot blocks and to be numbered 200 pilot blocks is example, the value that is numbered the corresponding second layer sequence on 4 RE in 100 the pilot blocks is identical, the value that is numbered the corresponding second layer sequence on 4 RE in 200 the pilot blocks is identical, but the value that is numbered the corresponding second layer sequence on 4 RE in 100 the pilot blocks be numbered 200 pilot blocks in 4 RE on the value of corresponding second layer sequence can be inequality.

The specific implementation of method shown in Figure 4 can repeat no more here with reference to the associated description in the method shown in Figure 1.

The embodiment of the invention also provides a kind of base station, can realize method shown in Figure 4.As shown in Figure 6, this base station comprises: first generation unit 601, be used to a UE to generate and be used for first reference signal that a UE carries out channel estimating, and make the value on all RE in each pilot blocks that the second layer sequence of first reference signal takies on running time-frequency resource all identical; Transmitting element 602 is used for first reference signal is sent to a UE.

For method shown in Figure 4 and base station shown in Figure 6, value on all RE in each pilot blocks that the second layer sequence of first reference signal takies on running time-frequency resource is all identical, like this, just needn't require UE when carrying out channel estimating, solve second layer sequence earlier, solve the ground floor sequence again, like this, Recombinant Interferon accesses inhibition, and the channel estimating performance of UE can improve.

,, can use above-mentioned similar scheme to carry out reference signal and distribute under the scene of promptly single sub-district MU-MIMO simultaneously for a plurality of UE that share identical running time-frequency resource provide service in single sub-district.Need be a plurality of sub-districts logical extension single sub-district MU-MIMO only.Because a plurality of UE are from same sub-district, then cell ID has guaranteed unanimity, when using cell ID and/or customer equipment identification to be UE generation reference signal in the base station, only needs retrain above-mentioned customer equipment identification.For example, when the base station generates first reference signal, if a UE is in multi-user multiple input multiple output mode, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when then the base station generated described first reference signal, or be paired into the customer equipment identification of any one subscriber equipment in the subscriber equipment of multi-user's multiple-input and multiple-output, perhaps be specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode; If a UE is in single user's MIMO mode, employed customer equipment identification was that a UE affiliated subdistrict is the conventional customer equipment identification that a UE distributes when the base station generated described first reference signal, perhaps was specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode.The base station can be used one of them generation reference signal of above-mentioned cell ID and customer equipment identification separately, also can use both to generate reference signal simultaneously.

As shown in Figure 7, the embodiment of the invention provides a kind of method of assigned references signal again, comprising:

S701: the base station is that UE generation is used for first reference signal that a UE carries out channel estimating, wherein, the second layer sequence of first reference signal and base station are that to share the second layer sequence of the reference signal that the UE of identical running time-frequency resource generates identical with a UE, and the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal and base station are for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of reference signal of UE generation of identical running time-frequency resource corresponding identical with a UE;

S702: the base station sends to a UE with first reference signal.

The second layer sequence of the reference signal that the UE of identical running time-frequency resource generates is identical specifically to be comprised in order to share with a UE for the second layer sequence of first reference signal and base station: the base station is identical with the cell ID that uses when generating the second layer sequence of reference signal for the UE that shares identical running time-frequency resource with a UE and/or identical customer equipment identification when generating the second layer sequence of first reference signal.

When a UE is in multi-user multiple input multiple output mode, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when the base station generated first reference signal, or was paired into the customer equipment identification of any one UE among the UE of multi-user's multiple-input and multiple-output.

As shown in Figure 8, the embodiment of the invention also provides a kind of base station, can realize method shown in Figure 7, comprising: first generation unit 801 is used to a UE to generate and is used for first reference signal that a UE carries out channel estimating.Wherein, first reference signal and first generation unit are that to share the reference signal that the UE of identical running time-frequency resource generates different with a UE, and the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal and first generation unit are for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of reference signal of UE generation of identical running time-frequency resource corresponding identical with a UE; Transmitting element 802 is used for first reference signal is sent to a UE.

Method and base station for above-mentioned assigned references signal, the base station be second layer sequence and the base station of first reference signal that generates of a UE for to share the second layer sequence of the reference signal that the UE of identical running time-frequency resource generates identical with a UE, the value of second layer sequence on the RE that takies on the running time-frequency resource of first reference signal is corresponding identical for the value of second layer sequence on the RE that takies on the running time-frequency resource of the reference signal of the UE generation of the running time-frequency resource shared identical with a UE with the base station.Like this, just needn't require UE when carrying out channel estimating, must solve second layer sequence earlier, solve the ground floor sequence again, disturb therefore and can be inhibited, the channel estimating performance of UE can improve.

Need to prove, the base station that provides for the embodiment of the invention, comprising a lot of unit all be dummy unit, that is, realize by the statement or the statement combination of computer language.In actual applications, the function that the combination of different statements realizes may be different, in this case, and also may be different to the division of dummy unit.That is to say, the embodiment of the invention has just provided a kind of dividing mode of dummy unit, in actual applications, those skilled in the art can adopt the dividing mode of different dummy units according to actual needs, as long as guarantee the function that the base station had that realizes that the embodiment of the invention provides.

One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or at random store memory body (Random Access Memory, RAM) etc.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (22)

1. the method for an assigned references signal is characterized in that, comprising:

The base station is that the generation of first subscriber equipment is used for first reference signal that described first subscriber equipment carries out channel estimating and corresponding first sub-district, wherein, described first reference signal be that the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously, described other sub-districts are to provide the sub-district except that described first sub-district in all sub-districts of service simultaneously for described first subscriber equipment;

Described base station sends to described first subscriber equipment with described first reference signal.

2. the method for claim 1 is characterized in that, also comprises:

Holding consultation in the corresponding base station in described base station and described other sub-districts is that the subscriber equipment of sharing identical running time-frequency resource with described first subscriber equipment generates reference signal.

3. method as claimed in claim 2 is characterized in that,

The corresponding base station in the running time-frequency resource that described first reference signal takies and described base station and described other sub-districts is for to share the running time-frequency resource that reference signal that the subscriber equipment of identical running time-frequency resource generates takies identical with described first subscriber equipment;

And the corresponding base station in the ground floor sequence of described first reference signal and described base station and described other sub-districts is that to share the ground floor sequence of the reference signal that the subscriber equipment of identical running time-frequency resource generates different with described first subscriber equipment;

And it is identical that the corresponding base station in the second layer sequence of described first reference signal and described base station and described other sub-districts is that the subscriber equipment of sharing identical running time-frequency resource with described first subscriber equipment generates the second layer sequence of reference signal;

Described ground floor sequence is an orthogonal sequence, and second layer sequence is the sequence except that orthogonal sequence.

4. method as claimed in claim 3, it is characterized in that, it is identical that the corresponding base station in the second layer sequence of described first reference signal and described base station and described other sub-districts is that the subscriber equipment of sharing identical running time-frequency resource with described first subscriber equipment generates the second layer sequence of reference signal, comprising:

The second layer sequence of described first reference signal is that to share the pattern of second layer sequence on running time-frequency resource of the reference signal that the subscriber equipment of identical running time-frequency resource generates identical with described first subscriber equipment in the corresponding base station in the pattern on the running time-frequency resource and described base station and described other sub-districts;

And the corresponding base station in the value of second layer sequence on the RE that takies on the running time-frequency resource of described first reference signal and described base station and described other sub-districts is for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of the reference signal that the subscriber equipment of identical running time-frequency resource generates corresponding identical with described first subscriber equipment.

5. as any described method among the claim 1-4, it is characterized in that, described first reference signal be that the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously, comprise one of following situation at least:

The sequence of described first reference signal be that the sequence of the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously;

The sequence of described first reference signal the pattern on the running time-frequency resource be that the pattern of sequence on running time-frequency resource of the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously;

The value of the sequence of described first reference signal on the Resource Unit RE that takies on the running time-frequency resource be that the value of sequence on the RE that takies on the running time-frequency resource of the reference signal that generates of described first subscriber equipment is corresponding identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously.

6. as any described method among the claim 1-4, it is characterized in that, described first reference signal be identical the comprising of reference signal that described first subscriber equipment generates for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously:

When described base station generates described first reference signal employed cell ID with simultaneously for described first subscriber equipment provide corresponding base station, other sub-districts of service be described first subscriber equipment when generating reference signal employed cell ID identical;

And/or, when described base station generates described first reference signal employed customer equipment identification with simultaneously for described first subscriber equipment provide corresponding base station, other sub-districts of service be described first subscriber equipment when generating reference signal employed customer equipment identification identical.

7. method as claimed in claim 6 is characterized in that, after described base station sent to described first subscriber equipment with described first reference signal, described method also comprised:

If described base station is to the described first user device transmissions data failure, and described base station need transmit data again,

Employed cell ID and/or customer equipment identification are that described first subscriber equipment generates and is used for second reference signal that described first subscriber equipment carries out channel estimating when generating reference signal for described first subscriber equipment before then described base station reuses, and the cell ID that perhaps uses the described first subscriber equipment affiliated subdistrict is that described first subscriber equipment generates and is used for second reference signal that described first subscriber equipment carries out channel estimating;

And described second reference signal sent to described first subscriber equipment.

8. method as claimed in claim 6, it is characterized in that, employed cell ID was the cell ID that empty S intends when described base station generated described first reference signal, or the cell ID of any one sub-district in all sub-districts of service is provided for described first subscriber equipment simultaneously.

9. method as claimed in claim 6, it is characterized in that, when described first subscriber equipment is in multi-user multiple input multiple output mode, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when described base station generated described first reference signal, or be paired into the customer equipment identification of any one subscriber equipment in the subscriber equipment of multi-user's multiple-input and multiple-output, perhaps be specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode;

When described first subscriber equipment is in single user's MIMO mode, employed customer equipment identification was the conventional customer equipment identification that the described first subscriber equipment affiliated subdistrict is first user equipment allocation when described base station generated described first reference signal, perhaps was specifically designed to the customer equipment identification under the multi-cell cooperating transmission mode.

10. a base station is characterized in that, comprising:

First generation unit, be used to first subscriber equipment to generate and be used for first reference signal that described first subscriber equipment carries out channel estimating and corresponding first sub-district, wherein, described first reference signal be that the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously, described other sub-districts are to provide the sub-district except that described first sub-district in all sub-districts of service simultaneously for described first subscriber equipment;

Transmitting element is used to obtain first reference signal that described first generation unit generates, and described first reference signal is sent to described first subscriber equipment.

11. base station as claimed in claim 10 is characterized in that,

It is that the subscriber equipment of sharing identical running time-frequency resource with described first subscriber equipment generates reference signal that described first generation unit also is used for holding consultation with corresponding base station, described other sub-districts;

It is that described and described first subscriber equipment is shared the subscriber equipment that reference signal that the subscriber equipment of identical running time-frequency resource generates sends to the shared identical running time-frequency resource of described and described first subscriber equipment that described transmitting element also is used for first generation unit.

12. base station as claimed in claim 11, it is characterized in that the corresponding base station in the running time-frequency resource that described first reference signal takies and described first generation unit and described other sub-districts is for to share the running time-frequency resource that reference signal that the subscriber equipment of identical running time-frequency resource generates takies identical with described first subscriber equipment;

And the corresponding base station in the ground floor sequence of described first reference signal and described first generation unit and described other sub-districts is that to share the ground floor sequence of the reference signal that the subscriber equipment of identical running time-frequency resource generates different with described first subscriber equipment;

And it is identical that the corresponding base station in the second layer sequence of described first reference signal and described first generation unit and described other sub-districts is that the subscriber equipment of sharing identical running time-frequency resource with described first subscriber equipment generates the second layer sequence of reference signal;

Described ground floor sequence is an orthogonal sequence, and second layer sequence is the sequence except that orthogonal sequence.

13. base station as claimed in claim 12, it is characterized in that, it is identical that the corresponding base station in the second layer sequence of described first reference signal and described first generation unit and described other sub-districts is that the subscriber equipment of sharing identical running time-frequency resource with described first subscriber equipment generates the second layer sequence of reference signal, comprising:

The second layer sequence of described first reference signal is that to share the pattern of second layer sequence on running time-frequency resource of the reference signal that the subscriber equipment of identical running time-frequency resource generates identical with described first subscriber equipment in the corresponding base station of the pattern on the running time-frequency resource and described first generation unit and described other sub-districts;

And the corresponding base station in the value of second layer sequence on the RE that takies on the running time-frequency resource of described first reference signal and described first generation unit and described other sub-districts is for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of the reference signal that the subscriber equipment of identical running time-frequency resource generates corresponding identical with described first subscriber equipment.

14. as any described base station of claim 10-13, it is characterized in that, described first reference signal be that the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously, comprise one of following situation at least:

The sequence of described first reference signal be that the sequence of the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously;

The sequence of described first reference signal the pattern on the running time-frequency resource be that the pattern of sequence on running time-frequency resource of the reference signal that generates of described first subscriber equipment is identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously;

The sequence of described first reference signal the value on the RE that takies on the running time-frequency resource be that the value of sequence on the RE that takies on the running time-frequency resource of the reference signal that generates of described first subscriber equipment is corresponding identical for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously.

15. as any described base station of claim 10-13, it is characterized in that, described first reference signal be identical the comprising of reference signal that described first subscriber equipment generates for described first subscriber equipment provides corresponding base station, other sub-districts of service simultaneously:

When described first generation unit generates described first reference signal employed cell ID with simultaneously for described first subscriber equipment provide corresponding base station, other sub-districts of service be described first subscriber equipment when generating reference signal employed cell ID identical;

And/or, when described first generation unit generates described first reference signal employed customer equipment identification with simultaneously for described first subscriber equipment provide corresponding base station, other sub-districts of service be described first subscriber equipment when generating reference signal employed customer equipment identification identical.

16. base station as claimed in claim 15 is characterized in that,

Described first generation unit also is used for, after described transmitting element sends to described first subscriber equipment with described first reference signal, if described base station is to the described first user device transmissions data failure, and described base station need be transmitted data again, employed cell ID and/or customer equipment identification are that described first subscriber equipment generates and is used for second reference signal that described first subscriber equipment carries out channel estimating when generating reference signal for described first subscriber equipment before then reusing, and the cell ID that perhaps uses the described first subscriber equipment affiliated subdistrict is that described first subscriber equipment generates and is used for second reference signal that described first subscriber equipment carries out channel estimating;

Described transmitting element also is used for, and described second reference signal is sent to described first subscriber equipment.

17. the method for an assigned references signal, it is characterized in that, comprise: the base station is that first subscriber equipment generates and to be used for first reference signal that described first subscriber equipment carries out channel estimating, and makes the value on all Resource Unit RE in each pilot blocks that the second layer sequence of described first reference signal takies on running time-frequency resource all identical;

Described base station sends to described first subscriber equipment with described first reference signal.

18. a base station is characterized in that, comprising:

First generation unit, be used to first subscriber equipment to generate and be used for first reference signal that described first subscriber equipment carries out channel estimating, and make the value on all RE in each pilot blocks that the second layer sequence of described first reference signal takies on running time-frequency resource all identical;

Transmitting element is used for described first reference signal is sent to described first subscriber equipment.

19. the method for an assigned references signal is characterized in that, comprising:

The base station is that the generation of first subscriber equipment is used for first reference signal that described first subscriber equipment carries out channel estimating, wherein, the second layer sequence of described first reference signal and described base station are that to share the second layer sequence of the reference signal that the subscriber equipment of identical running time-frequency resource generates identical with described first subscriber equipment, and the value of second layer sequence on the RE that takies on the running time-frequency resource of described first reference signal and described base station are for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of reference signal of subscriber equipment generation of identical running time-frequency resource corresponding identical with described first subscriber equipment;

Described base station sends to described first subscriber equipment with described first reference signal.

20. method as claimed in claim 19 is characterized in that, the second layer sequence of described first reference signal and described base station identical comprising of second layer sequence for sharing the reference signal that the subscriber equipment of identical running time-frequency resource generates with described first subscriber equipment:

Described the base station identical cell ID of use and/or identical customer equipment identification during with the second layer sequence that generates reference signal at the subscriber equipment that be with described first subscriber equipment is shared identical running time-frequency resource when generating the second layer sequence of first reference signal.

21. method as claimed in claim 20, it is characterized in that, when described first subscriber equipment is in multi-user multiple input multiple output mode, employed customer equipment identification was the customer equipment identification that is specifically designed to multi-user's multiple-input and multiple-output when described base station generated described first reference signal, or was paired into the customer equipment identification of any one subscriber equipment in the subscriber equipment of multi-user's multiple-input and multiple-output.

22. a base station is characterized in that, comprising:

First generation unit, be used to first subscriber equipment to generate and be used for first reference signal that described first subscriber equipment carries out channel estimating, wherein, described first reference signal and described first generation unit are that to share the reference signal that the subscriber equipment of identical running time-frequency resource generates different with described first subscriber equipment, and the value of second layer sequence on the RE that takies on the running time-frequency resource of described first reference signal and described first generation unit are for to share the value of second layer sequence on the RE that takies on the running time-frequency resource of reference signal of subscriber equipment generation of identical running time-frequency resource corresponding identical with described first subscriber equipment;

Transmitting element is used for described first reference signal is sent to described first subscriber equipment.

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