CN102487532B - Signal sending method and device thereof of collaborative multi-point transmission system - Google Patents

Abstract

The invention discloses a signal sending method and a device thereof of a collaborative multi-point transmission system, and the method comprises the following steps: enabling a service cell of a collaborative user to bind a physical mark, a sequence scrambling mark and a time slot number of the service cell of the collaborative user with a user mark of the collaborative user, and sending to other collaborative cells in a collaborative cell cluster of the collaborative user; enabling the cells in the collaborative cell cluster of the collaborative user to determine a demodulation reference signal sequence of the collaborative user according to the physical mark, the sequence scrambling mark and the time slot number of the service cell of the collaborative user; and enabling the cells in the collaborative cell cluster of the collaborative user to send the demodulation reference signal sequence of the collaborative user and user data to the collaborative user. According to the method and the device, disclosed by the invention, the problem that the collaborative user can not perform joint detection on received DMRS (demodulation reference signals) due to different sequences of the DMRS, which are sent from all the collaborative cells of the same collaborative user, can be solved.

Description

A kind of signaling method of cooperative multicast system and device thereof

Technical field

The present invention relates to the communications field, relate in particular to a kind of signaling method and device thereof of cooperative multicast system.

Background technology

LTE-A (LTE-Advanced) system adopts OFDMA (Orthogonal Frequency Division Multiplexing Access, the multiple access access of OFDM) technology, in community, user's information is carried in mutually orthogonal different sub carrier, thereby has avoided the multiple access between user in community to disturb.But OFDMA access mode itself does not possess the ability that suppresses presence of intercell interference, therefore affects the interference of LTE-A systematic function mainly from neighbor cell, i.e. the interference of minizone.

In the conventional cellular systems of identical networking, the user of cell edge will be subject to the interference of neighbor cell signal, and these serious interference have limited service quality and the throughput of edge customer.If adjacent multiple communities transmit to user jointly by cooperating, interference signal is suppressed, just can effectively reduce presence of intercell interference, improve each user's signal received signal to noise ratio.

CoMP (Coordinated Multi-point Transmission, cooperative multipoint transmission) system refers to that multiple communities (may be multiple communities of same site or multiple communities of different sites) are by cooperating each other, by certain targeted customer's signal after different weights, combine again and send to this targeted customer, to improve service quality and the throughput of Cell Edge User, improve the availability of frequency spectrum of system.

As shown in Figure 1, community 1, community 2 and community 3 form a collaboration type cell cluster to the CoMP system of the static cooperation in San Ge community, and user 1, user 2 and user 3 form a collaboration user group.In down link, first user 1, user 2 and user's 3 signal passes through preliminary treatment, then combines transmitting by community 1, community 2 and community 3.Through Signal Pretreatment operation, in the signal that user 1 receives, suppress user 2 and user's 3 interference signal, in the signal that user 2 receives, suppress user 1 and user's 3 interference signal, in the signal that user 3 receives, suppressed user 1 and user's 2 interference signal.

The situation of the static cooperation in CoMP system Shi Sange community in Fig. 1, fixes a cooperation cell bunch of composition, San Ge community (community 1, community 2 and community 3), combines and provides downlink data transmission for collaboration user group.CoMP system can also be carried out dynamic cooperative, i.e. the selection of cooperation cell is determined by each user's performance.Each user can select the best community of some channel qualities to carry out the reception of useful signal, and the community of these cooperations simultaneously is also dynamically selected to disturb the strongest interference signal to eliminate.The performance of dynamic cooperative scheme is compared static cooperation scheme and is made moderate progress, but the complexity of scheduling is higher.

In LTE-A Rel-9/Rel-10 system, descending DMRS (Demodulation Reference Signals, demodulated reference signal) frequency pilot sign be inserted into PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) in the running time-frequency resource at place, after precoding weighting, launch together with data symbol, carry out demodulation for auxiliary data signal.If υ=1,2 ..., 8 is the transmission fluxion (Layers) of high-order mimo (Multi-Input Multi-Output, multiple-input and multiple-output) transmission possible configuration, 8 antenna port p ∈ { 7 of the maximum definable of descending DMRS of Rel-9/Rel-10,8 ..., υ+6}.

In LTE Rel-9/Rel-10 system, the specific design method of the lower DMRS Pattern of Rank 2 and Rank 3～8 configuration, can be as shown in Fig. 2 A, Fig. 2 B and Fig. 2 C:

Rank=2:DMRS expense 12REs.The DMRS of 2 layer is divided into 1 group (in Fig. 2 A, Fig. 2 B and Fig. 2 C, being shown dark RE), carry the DMRS of 2 layer with adjacent 2 RE of same color on a line carrier wave, corresponding layer1 and layer2 respectively, adopts the OCC code division multiplexing that length is 2;

Rank=3～4:DMRS expense 24REs.The DMRS of 4 layer is divided into 2 groups, and (in Fig. 2 A, Fig. 2 B and Fig. 2 C, dark color is divided into one group, corresponding layer 1-2; Horizontal stripe be divided into one group, corresponding layer3-4), wherein, with the DMRS of 2 layer of adjacent 2 RE carrying of same color on a line carrier wave, adopt the OCC code division multiplexing that length is 2;

Rank=5～8: DMRS expense 24REs.The DMRS of 8 layer is divided into 2 groups, and (in Fig. 2 A, Fig. 2 B and Fig. 2 C, dark color is divided into one group, corresponding layer 1,2,5,7; Horizontal stripe be divided into one group, corresponding layer 3,4,6,8), wherein, with the DMRS of 4 layer of 4 RE carrying of same color on a line carrier wave, adopt the OCC code division multiplexing that length is 4.When grouping can ensure Rank self adaptation like this, 2 port number balanced distribution as far as possible that group comprises.

Inventor realizing in process of the present invention, finds that prior art at least exists following problem:

In CoMP system, if be under the jurisdiction of DMRS burst that multiple cell transmission in same cooperation cell bunch are different to collaboration user, can cause collaboration user to carry out correct solution to DMRS signal and be in harmonious proportion channel estimating.For the problems referred to above, not yet there is at present corresponding solution.

For ease of understanding, taking the situation of unique user cooperation (Single User CoMP, SU-CoMP) as example explanation.The static cooperation in Fig. 3 Shi Sange community, combines the example that sends downlink data (SU-CoMP) for single collaboration user 1.User 1 Serving cell is community 1, but under cooperative multipoint transmission (SU-CoMP) pattern, when descending transmission, user 1 also can receive the descending associating transmitted signal from community 2 and community 3 simultaneously, wherein:

Community 1, community 2 and community 3 send to user 1 DMRS burst to be expressed as: R ₁₁, R ₂₁and R ₃₁, wherein, R ₁₁, R ₂₁and R ₃₁not identical;

San Ge community is expressed as to the channel of collaboration user 1: H ₁₁, H ₂₁, H ₃₁;

Suppose that San Ge community is expressed as the precoding weight coefficient of collaboration user 1: W ₁₁, W ₂₁and W ₃₁.

The DMRS signal indication of three community associated transmissions that collaboration user 1 receives is:

Y ₁＝H ₁₁W ₁₁R ₁₁+H ₂₁W ₂₁R ₂₁+H ₃₁W ₃₁R ₃₁+n………………………………[1]

Collaboration user 1 uses known DMRS signal R ₁₁, R ₂₁and R ₃₁carry out channel estimating, now wish that the equivalent channel obtaining by DMRS input is: H ₁₁w ₁₁+ H ₂₁w ₁₂+ H ₃₁w ₃₁, then obtain the equivalent channel on whole Resource Block by DMRS time-frequency domain two-dimensional interpolation.But, due to the DMRS burst R that sends to collaboration user 1 ₁₁, R ₂₁and R ₃₁different, therefore user 1 cannot be to the DMRS signal Y receiving ₁carry out channel estimating.

Summary of the invention

The object of the present invention is to provide a kind of signaling method and device thereof of cooperative multicast system, in order to solve the DMRS burst difference for the each cooperation cell of same collaboration user, cause collaboration user cannot carry out to the DMRS signal receiving the problem of joint-detection, for this reason, the embodiment of the present invention adopts following technical scheme:

A signaling method for cooperative multicast system, comprising:

The Serving cell of collaboration user is by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, send to other cooperation cell in the cooperation cell bunch of described collaboration user;

The Cu Nei community, cooperation cell of described collaboration user, according to the described Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, determines the demodulated reference signal sequence of described collaboration user;

The demodulated reference signal sequence of described collaboration user and user data are sent to described collaboration user by the Cu Nei community, cooperation cell of described collaboration user.

A kind of base station equipment, is applied to cooperative multicast system, comprising:

The first transport module, for by the Serving cell physical label of collaboration user and sequence scrambling mark and time-gap number, binds together with the user ID of described collaboration user, sends to other cooperation cell in the cooperation cell bunch of described collaboration user;

Burst determination module, for the Serving cell that is described collaboration user in current area, according to sequence scrambling mark and the time-gap number of the physical label of this Serving cell and described collaboration user, determine the demodulated reference signal sequence of described collaboration user; Or, in other cooperation cell situation in the cooperation cell that is described collaboration user in current area bunch except the Serving cell of described collaboration user, according to the Serving cell physical label of the described collaboration user receiving from the Serving cell of described collaboration user and sequence scrambling mark and time-gap number, determine the demodulated reference signal sequence of described collaboration user;

The second transport module, for sending to described collaboration user by the demodulated reference signal sequence of described collaboration user and user data.

The above embodiment of the present invention, the Serving cell of collaboration user is by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, send to other cooperation cell in the cooperation cell bunch of described collaboration user, thereby make the Cu Neige community, cooperation cell of this collaboration user use identical Serving cell physical label and sequence scrambling mark and time-gap number for this collaboration user, generate identical demodulated reference signal sequence, and then solve the demodulated reference signal sequence difference for the each cooperation cell of same collaboration user, cause collaboration user cannot carry out to the demodulated reference signal receiving the problem of joint-detection.

Brief description of the drawings

Fig. 1 is the CoMP system schematic of three static cooperations in base station in prior art;

Fig. 2 A, Fig. 2 B and Fig. 2 C are respectively the DMRS Pattern schematic diagram of LTE-A system in prior art;

Fig. 3 is the SU-CoMP system schematic of three static cooperations in base station in prior art;

The downlink data transmission flow schematic diagram that Fig. 4 provides for the embodiment of the present invention;

The structural representation of the base station equipment that Fig. 5 provides for the embodiment of the present invention.

Embodiment

In the embodiment of the present invention, for the DMRS design of the LTE Rel-9/Rel-10 system shown in Fig. 2, for any antenna port p ∈ 7,8 ..., υ+6}, υ=1,2 ..., 8, DMRS burst r (m) can be expressed as:

$r\left(m\right)=\frac{1}{\sqrt{2}}(1-2\&CenterDot;c\left(2m\right))+\mathrm{<figure-callout\; id="1"\; label="j"\; filenames="HSA00000377966800022.png"\; state="\{\{state\}\}">j</figure-callout>}\frac{1}{2}(1-2\&CenterDot;c(2m+1)),m=\mathrm{0,1},...,12N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1...\left[2\right]$

Wherein,

for maximum downlink resource piece (Resource Block, RB) number, the generation of pseudo random sequence c (i) is depended in the generation of burst r (m), and the predefined initialization factor is depended in the generation of pseudo random sequence c (i):

Wherein, n _stime slot (Slot) numbering that sends the resource at DMRS signal place,

the physical I D of community, and n _sCIDbe to transmit the indicated sequence scrambling ID of the DCI Format 2B signaling that is associated (Scrambling Identity, or claim Scrambling ID) with PDSCH, possible value is 0 or 1.Different n _sCIDdMRS burst corresponding to value is accurate orthogonality, also has certain correlation, but not completely orthogonal.If the DCI Format 2B signaling not being associated with PDSCH instruction, UE (User Equipment, subscriber equipment) just gives tacit consent to n _sCIDvalue be 0.Table 1 shows Scrambling ID and the n of DCI Format 2B signaling instruction _sCIDthe corresponding relation of value.

Table 1

The Scrambling ID of DCI format 2B signaling instruction	n SCIDValue
		0	0
1	1

In the cellular wireless system of the non-cooperation of tradition, three key parameters are depended in the generation of the DMRS signal pilot sequence r (m) that each community sends to user, the time-gap number n that signal sends _s, the physical address of this cell allocation and indicated sequence scrambling ID (Scrambling ID) the value n of DCI Format 2B signaling _sCID.For example: three non-cooperation cell, community 1 is user 1 Serving cell, and community 2 is Serving cells of user 2, and community 3 is Serving cells of user 3, due to the physical address of each cell allocation

different, the Scrambling ID of network side DCI Format 2B instruction may be also different, like this, even if the identical fluxion of adjacent three cell transmission is given the user of community separately, (Rank is identical, the DMRS Pattern using is also identical), the value of the DMRS burst r (m) inserting in pilot tone RE position is not identical yet.In the cellular system of the non-cooperation of tradition, DMRS signal is transmitted to user separately in different districts, independently carries out demodulation reference signal, and the demodulated reference signal sequence between each community is different.

In order to solve in CoMP system, due to the DMRS burst difference of each cooperation cell transmission, cause collaboration user to carry out joint-detection to the DMRS signal receiving, therefore can not obtain the problem of the equivalent channel on DMRS frequency pilot sign, the embodiment of the present invention bunch is combined in cooperation cell while sending DMRS signal to certain collaboration user, use identical DMRS burst, the each community in cooperation cell bunch is used the physical address that Serving cell, collaboration user place (Serving cell) is distributed

the Scrambling ID value n that Serving cell, collaboration user place DCI Format 2B signaling is indicated _sCID, and the time-gap number n of Serving cell, collaboration user place agreement _s, generate DMRS burst; For this reason, the Serving cell at collaboration user place (Serving cell) need to be by the physical address of Serving cell

indicate the Scrambling ID value to collaboration user with network side DCI Format 2B signaling

the time-gap number n of Serving cell agreement _sand the UE ID of collaboration user gives other cooperation cell (Coordinated cell) in cooperation cell bunch alternately, thereby ensure each cooperation cell for the DMRS burst that same cooperation UE generates identical, and then ensure that cooperation UE can carry out correct solution mediation channel estimating to DMRS signal, correctly to receive data.

Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.

Referring to Fig. 4, be the downlink data transmission flow schematic diagram that the embodiment of the present invention provides, this flow process is not only applicable to the situation of alone family cooperation (SU-CoMP), is applicable to the situation of multi-user Cooperation (MU-CoMP) yet.This flow process can comprise the steps:

Step 401, network side is to UE notice RRM measuring assembly, and RRM measuring assembly can be also that UE is known in advance.

Step 402, RSRP (the Reference Signal Receiving Power of some communities that UE measurement RRM measuring assembly comprises, Reference Signal Received Power) value or RSRQ (Reference Signal Receiving Quality, Reference Signal Received Quality) value, and to network side reporting measurement result.

Step 403, the measurement result that network side reports according to UE is determined Serving cell and the cooperation cell bunch of UE.

Step 404, network side by the Serving cell of determining and cooperation cell bunch notice to UE.

Step 405, UE measures the channel condition information of Cu Neige community, cooperation cell, and to the channel information of all communities in network side feedback cooperation cell bunch.

Step 406, network side carries out resource distribution and combined dispatching according to the channel condition information of cooperation UE feedback.

Step 407, the address, mutual physical area, each cooperation cell in cooperation cell bunch

the Scrambling ID value n of DCI Format2B signaling instruction _sCID, time-gap number n _s, and the UE ID of cooperation UE.Wherein, UE ID is corresponding with this UE

and n _sCID, and time-gap number n _sbind together and carry out alternately.

Concrete, the Serving cell of cooperation UE is by the address, physical area, Serving cell of this UE

the Scrambling ID value n of DCIFormat 2B signaling instruction _sCIDwith time-gap number n _s, bind together with the UE ID of this UE, send to other cooperation cell in the cooperation cell bunch of this UE.

Step 408, the each cooperation cell in cooperation cell bunch, determines its Serving cell physical address according to the UE ID of cooperation UE

the Scrambling ID value of Serving cell DCI Format 2B signaling instruction

and the time-gap number n of Serving cell agreement _s, and be cooperation UE generation DMRS pilot frequency sequence.Due to for same cooperation UE, this UE that each cooperation cell obtains is corresponding

with

identical, and the time-gap number n of the resource at DMRS signal place in formula (3) _salso identical, the initialization factor of the pilot frequency sequence of the each cooperation cell therefore generating according to formula (3) is identical, and then the DMRS pilot frequency sequence of the each cooperation cell generating according to formula (2) is also identical.

Step 409, the each cooperation cell in cooperation cell bunch, by DMRS pilot tone together with data after precoding weighting, send to cooperation UE.

In above-mentioned flow process, step 401～404th, the deterministic process of cooperation cell bunch, step 405～406th, network side carries out resource to cooperation UE and distributes and the process of combined dispatching, and step 409 is each cooperation cell in cooperation cell bunch processes to cooperation UE transmission downlink data.These processes all can be with reference to existing techniques in realizing.

Step 407 in above-mentioned flow process is processes of the relevant information that in the CoMP system that provides of the embodiment of the present invention, between cooperation cell, the mutual DMRS of generation signal uses.For the realization of step 407 in above-mentioned flow process, the embodiment of the present invention, taking Intra-site CoMP application scenarios and Inter-site CoMP application scenarios as example, has provided respectively concrete solution, below this is described in detail.

Under Intra-site CoMP (CoMP in standing) application scenarios, if the processing of baseband signal is carried out by multiple LTE Baseband Processing Unit of same base station (eNodeB) respectively in multiple sectors, the mutual information needed of backboard that the Serving cell (Serving cell) at the UE place that cooperates can be by LTE Baseband Processing Unit is to other cooperation cell (Coordinated cell) in cooperation cell bunch.Be put in the LTE Baseband Processing Unit that disposal ability is stronger if the Base-Band Processing of multiple sectors is concentrated, the Serving cell (Serving cell) at the UE place that cooperates directly in the mutual information needed of this Base-Band Processing intralamellar part to other cooperation cell (Coordinated cell) in cooperation cell bunch.

Taking the situation of San Ge sector, identical site cooperation transmission (Intra-site CoMP) as example, if the processing of baseband signal can be carried out by three LTE Baseband Processing Unit of same base station (eNodeB) respectively in three sectors, the backboard that three LTE Baseband Processing Unit can pass through BBU (Base Band Unit, Base Band Unit) carries out the information interaction between community.Because backboard interactive information ability is strong, therefore can meet the demand of descending CoMP.Be put in the LTE Baseband Processing Unit that disposal ability is stronger if the Base-Band Processing of three sectors is concentrated, can, by this Base-Band Processing intralamellar part being carried out to software and hardware upgrading to support the information interaction between community, also can meet the demand of descending CoMP.

Concrete, under Intra-site CoMP application scenarios, if the processing of baseband signal is carried out by three LTE Baseband Processing Unit of same base station (eNodeB) respectively in three sectors, the backboard of LTE Baseband Processing Unit is passed through by the physical address of Serving cell in the Serving cell (Serving cell) at the UE place that cooperates indicate the Scrambling ID value to this cooperation UE with network side DCI Format 2B signaling

time-gap number n _s, and the UE ID of this cooperation UE gives other cooperation cell (Coordinated cell) in cooperation cell bunch alternately; Be put in the LTE Baseband Processing Unit that disposal ability is stronger if the Base-Band Processing of three sectors is concentrated, the Serving cell (Serving cell) at the UE place that cooperates directly at this Base-Band Processing intralamellar part by the physical address of Serving cell indicate the Scrambling ID value to cooperation UE with network side DCI Format 2B signaling time-gap number n _s, and the UE ID of cooperation UE gives other cooperation cell (Coordinated cell) in cooperation cell bunch alternately.

In above-mentioned reciprocal process, the physical address of Serving cell

indicate the Scrambling ID value to cooperation UE with network side DCI Format 2B signaling

and time-gap number n _s, bind together mutual to other cooperation cell in cooperation cell bunch with the UE ID of the corresponding UE of cooperation.This is because when any one community in cooperation cell bunch sends descending DMRS signal to certain cooperation UE, can determine the physical address of its Serving cell by the UE ID of this cooperation UE

indicate the Scrambling ID value to this cooperation UE with service subzone network side DCI Format 2B signaling

and combine the time-gap number n of transmission _sthereby, can send identical DMRS pilot frequency sequence to this cooperation UE.

Under Inter-site CoMP (CoMP between standing) application scenarios, the X2 interface between base station (eNodeB) can pass through in the Serving cell (Serving cell) at cooperation UE place, and alternately information needed is to other cooperation cell (Coordinated cell) in cooperation cell bunch.

Taking different sites, the situation of three cell cooperative transmission (Inter-site CoMP) is as example, and the cell cooperative between different base station (eNodeB), can realize by the information interaction of X2 interface between BBU.Under Inter-site CoMP application scenarios, the Serving cell (Serving cell) at cooperation UE place is by the X2 interface between base station (eNodeB), by the physical address of Serving cell

indicate the Scrambling ID value to cooperation UE with network side DCIFormat 2B signaling

time-gap number n _s, and the UE ID of cooperation UE gives other cooperation cell (Coordinated cell) in cooperation cell bunch alternately.

Concrete, the physical address of Serving cell

indicate the Scrambling ID value to collaboration user with network side DCI Format 2B signaling

and time-gap number n _s, bind together mutual to other cooperation cell in cooperation cell bunch with the UE ID of corresponding cooperation UE.This is because when any one community in cooperation cell bunch sends descending DMRS signal to certain cooperation UE, can determine the physical address of its Serving cell by the UE ID of this cooperation UE indicate the Scrambling ID value to this cooperation UE with service subzone network side DCIFormat 2B

and combine the time-gap number n of transmission _sthereby, can send identical DMRS pilot frequency sequence to this cooperation UE.

It should be noted that, in current X2AP agreement, X2 interface message has been supported the physical address of mutual community between adjacent base station

and user's UE ID, so only need the extra interactive service subzone network side DCI Format 2B signaling of X2 interface to indicate the Scrambling ID value to collaboration user

and combine the time-gap number n of transmission _s.

Also it should be noted that; in current standard; be UE indicator sequence scrambling ID by DCI Format 2B signaling; but the embodiment of the present invention does not limit this;; can be UE indicator sequence scrambling ID by other signaling or mode if follow-up, all should be within protection scope of the present invention.

Separately it should be noted that, the embodiment of the present invention can be applicable to TDD (Time Division Duplexing, time division duplex) system, also can be applicable to FDD (Frequency Division Duplexing, Frequency Division Duplexing (FDD)) system.

Taking the SU-CoMP scene shown in Fig. 3 as example, adopt the above embodiment of the present invention, its flow process can be as follows by formulae express:

Community 1, community 2 and community 3 send to user 1 DMRS burst to be expressed as: R ₁₁, R ₂₁and R ₃₁; Because the each community in cooperation cell bunch is used the address, physical area of Serving cell (Serving cell)

with pilot frequency sequence scrambling ID

and the time-gap number n that combines transmission of Serving cell agreement _sgenerate DMRS sequence, each cell reference signals sequence R ₁₁, R ₂₁and R ₃₁identical, unified using represent;

San Ge community is expressed as to the channel of collaboration user 1: H ₁₁, H ₂₁, H ₃₁;

Suppose that San Ge community is expressed as the precoding weight coefficient of collaboration user 1: W ₁₁, W ₂₁and W ₃₁.

The DMRS signal indication of three community associated transmissions that collaboration user 1 receives is:

${\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="HSA00000377966800022.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1=H_{11}{W}_{11}{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000377966800022.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^{\mathrm{Servingcell}}+H_{21}{W}_{21}{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000377966800022.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^{\mathrm{Servingcell}}+H_{31}{W}_{31}{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000377966800022.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^{\mathrm{Servingcell}}+n...\left[4\right]$

Collaboration user 1 uses known DMRS signal

carry out channel estimating, obtain collaboration user 1 by DMRS input and be positioned at the equivalent channel on frequency pilot sign:

${\stackrel{\&OverBar;}{H}}_1=\frac{Y_1}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000377966800022.png"\; state="\{\{state\}\}">R</figure-callout>}}_1^{\mathrm{Servingcell}}}=H_{11}{W}_{11}+H_{21}{W}_{21}+H_{31}{W}_{31}+\tilde{n}...\left[5\right]$

Then obtain the equivalent channel of whole PDSCH data area collaboration user 1 by DMRS time-frequency domain two-dimensional interpolation.

Can find out, the DMRS signaling method of the CoMP system that the embodiment of the present invention provides, solve in CoMP, due to the DMRS burst difference of each cooperation cell transmission, cause collaboration user to carry out joint-detection to the DMRS signal receiving, therefore can not obtain the problem of the equivalent channel on DMRS frequency pilot sign.This scheme is not only applicable to the situation of single user collaboration (SU-CoMP), is also applicable to the situation of multi-user Cooperation (MU-CoMP).

Based on identical technical conceive, the embodiment of the present invention also provides a kind of base station equipment, can be applicable to above-mentioned flow process.

Referring to Fig. 5, the structural representation of the base station equipment providing for the embodiment of the present invention, this base station equipment can be applicable to TDD system or FDD system, and as shown in the figure, this base station equipment can comprise:

The first transport module 501, for by the Serving cell physical label of collaboration user and sequence scrambling mark and time-gap number, binds together with the user ID of described collaboration user, sends to other cooperation cell in the cooperation cell bunch of described collaboration user;

Burst determination module 502, for the Serving cell that is described collaboration user in current area, according to sequence scrambling mark and the time-gap number of the physical label of this Serving cell and described collaboration user, determine the demodulated reference signal sequence of described collaboration user; Or, in other cooperation cell situation in the cooperation cell that is described collaboration user in current area bunch except the Serving cell of described collaboration user, according to the Serving cell physical label of the described collaboration user receiving from the Serving cell of described collaboration user and sequence scrambling mark and time-gap number, determine the demodulated reference signal sequence of described collaboration user;

The second transport module 503, for sending to described collaboration user by the demodulated reference signal sequence of described collaboration user and user data.

In station in cooperative multicast system, in the situation that the baseband signal of multiple sectors is processed by multiple LTE Baseband Processing Unit of same base station respectively, the first transport module 501 can be by the backboard of LTE Baseband Processing Unit, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, be transferred to other cooperation cell in the cooperation cell bunch of described collaboration user.

In station in cooperative multicast system, in the situation that the baseband signal of multiple sectors is processed by a LTE Baseband Processing Unit, the first transport module 501 can be at described Base-Band Processing intralamellar part, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, be transferred to other cooperation cell in the cooperation cell bunch of described collaboration user.

Between station in cooperative multicast system, the first transport module 501 can be by the X2 interface between base station equipment, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, send to the base station equipment under other cooperation cell in the cooperation cell bunch of described collaboration user.

It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.

Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be mobile phones in order to make a station terminal equipment, personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.

Claims (11)

1. a signaling method for cooperative multicast system, is characterized in that, comprising:

The Serving cell of collaboration user is by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, send to other cooperation cell in the cooperation cell bunch of described collaboration user;

The Cu Nei community, cooperation cell of described collaboration user, according to the described Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, determines the demodulated reference signal sequence of described collaboration user;

The demodulated reference signal sequence of described collaboration user and user data after precoding weighting, are sent to described collaboration user by the Cu Nei community, cooperation cell of described collaboration user.

2. the method for claim 1, it is characterized in that, in station in cooperative multicast system, in the situation that the baseband signal of multiple sectors is processed by multiple LTE Baseband Processing Unit of same base station respectively, the Serving cell of described collaboration user is by the backboard of LTE Baseband Processing Unit, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, be transferred to other cooperation cell in the cooperation cell bunch of described collaboration user.

3. the method for claim 1, it is characterized in that, in station in cooperative multicast system, in the situation that the baseband signal of multiple sectors is processed by a LTE Baseband Processing Unit, the Serving cell of described collaboration user is at described Base-Band Processing intralamellar part, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, be transferred to other cooperation cell in the cooperation cell bunch of described collaboration user.

4. the method for claim 1, it is characterized in that, between station in cooperative multicast system, the Serving cell of described collaboration user is by the X2 interface between base station, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, send to the base station under other cooperation cell in the cooperation cell bunch of described collaboration user.

5. the method as described in claim 1 to 4 any one, is characterized in that, the sequence scrambling mark of described collaboration user, for the DCI Format2B signaling of network side is indicated the sequence scrambling mark to described collaboration user.

6. the method as described in claim 1 to 4 any one, is characterized in that, described method is applied to TDD system or FDD system.

7. a base station equipment, is applied to cooperative multicast system, it is characterized in that, comprising:

The first transport module, for by the Serving cell physical label of collaboration user and sequence scrambling mark and time-gap number, binds together with the user ID of described collaboration user, sends to other cooperation cell in the cooperation cell bunch of described collaboration user;

Burst determination module, for the Serving cell that is described collaboration user in current area, according to sequence scrambling mark and the time-gap number of the physical label of this Serving cell and described collaboration user, determine the demodulated reference signal sequence of described collaboration user; Or, in other cooperation cell situation in the cooperation cell that is described collaboration user in current area bunch except the Serving cell of described collaboration user, according to the Serving cell physical label of the described collaboration user receiving from the Serving cell of described collaboration user and sequence scrambling mark and time-gap number, determine the demodulated reference signal sequence of described collaboration user;

The second transport module, for sending to described collaboration user by the demodulated reference signal sequence of described collaboration user and user data after precoding weighting.

8. base station equipment as claimed in claim 7, it is characterized in that, in station in cooperative multicast system, in the situation that the baseband signal of multiple sectors is processed by multiple LTE Baseband Processing Unit of same base station respectively, described the first transport module specifically for, by the backboard of LTE Baseband Processing Unit, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, be transferred to other cooperation cell in the cooperation cell bunch of described collaboration user.

9. base station equipment as claimed in claim 7, it is characterized in that, in station in cooperative multicast system, in the situation that the baseband signal of multiple sectors is processed by a LTE Baseband Processing Unit, described the first transport module specifically for, at described Base-Band Processing intralamellar part, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, be transferred to other cooperation cell in the cooperation cell bunch of described collaboration user.

10. base station equipment as claimed in claim 7, it is characterized in that, between station in cooperative multicast system, described the first transport module specifically for, by the X2 interface between base station equipment, by the Serving cell physical label of described collaboration user and sequence scrambling mark and time-gap number, bind together with the user ID of described collaboration user, send to the base station equipment under other cooperation cell in the cooperation cell bunch of described collaboration user.

11. base station equipments as described in claim 7 to 10 any one, is characterized in that, described base station equipment is applied to TDD system or FDD system.

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