CN102111879B - Method and equipment for distributing resources and sending channel state information pilot signal - Google Patents
Method and equipment for distributing resources and sending channel state information pilot signal Download PDFInfo
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- CN102111879B CN102111879B CN200910243218.9A CN200910243218A CN102111879B CN 102111879 B CN102111879 B CN 102111879B CN 200910243218 A CN200910243218 A CN 200910243218A CN 102111879 B CN102111879 B CN 102111879B
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Abstract
The invention provides a method and equipment for distributing resources and sending a channel state information pilot signal. The invention discloses a method and equipment for distributing resources for a CSI-RS (channel state information-reference signal) and a method and equipment for sending a CSI-RS. The method mainly comprises the following steps: after the pilot carrier frequency shift amount of a target cell is determined according to the Cell ID (identity) of the target cell, frequency shift is carried out on RE (Resource Element) carrying the CSI-RS in a PRB (Physical Resource Block) according to the determined pilot carrier frequency shift; and because the RE carrying the CSI-RS and the RE carrying a UE (user equipment)-Specific Port5-RS adopt the same algorithm for frequency shift, the CSI-RS subjected to frequency shift and the UE-Specific Port5-RS subjected to frequency shift have no interference.
Description
Technical field
The present invention relates to the communications field, relating in particular to a kind of is channel condition information pilot signal (the Channel State Information-Reference Signal in wireless communications environment, CSI-RS) method of Resources allocation, system and equipment, and a kind of method and apparatus that sends CSI-RS.
Background technology
Wireless channel is a kind of fading channel, passing through OFDM (Orthogonal Frequency Division Multiplex, OFDM) when symbol sends data, the expansion of multidiameter delay can cause intersymbol interference (Inter-Symbol Interference, ISI), and receive data by wireless channel under mobile status time, because the caused frequency displacement of Doppler effect meeting destroys the orthogonality between ofdm system subcarrier, cause interference (Inter Carrier Interference, ICI) between subcarrier.Therefore, need in the signal sending, insert pilot signal (Reference Signal, RS), make receiving terminal carry out channel estimating or channel detection according to the pilot signal receiving.
Ofdm system is at regular circulation prefix (Normal Cyclic Prefix, Normal CP) configuration under, a Physical Resource Block (Physical Resource Block, PRB) takies 14 OFDM symbols in time domain, takies 12 subcarriers (sub carries) on frequency domain.Pilot signal is take resource particle (Resource Element, RE) as unit, and it is an OFDM symbol in subcarrier and time domain on frequency domain that pilot signal takies a RE(on PRB).The pilot signal defining in LTE R8 is divided into two kinds of public guide frequency (Common Reference Signal, CRS) and special pilot frequency for user (UE-specific Reference Signal, also claims DRS).
As shown in Figure 1, it is the schematic diagram that inserts pilot signal in each RE of a PRB, as can be seen from Figure 1, front 3 OFDM symbols of a PRB are Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH), R0/R1/R2/R3 is respectively corresponding 4 CRS ports (Cell specific Port0/1/2/3) in LTE R8.Due to the Beamforming of LTE R8 agreement support single codeword single current (Single layer), therefore also design the downlink user dedicated pilot of one group of single codeword single current, be defined as the RS(UE-specific Port5-RS that antenna port 5 sends).The data (Data) that the base station of Serving cell sends to UE are also transmitted by PRB, and the RE that distributes to Data does not overlap with the RE that distributes to PDCCH and each pilot signal (CRS and DRS).
There is strong jamming in the pilot signal for fear of neighbor cell, the CRS of neighbor cell and DRS are carried out to frequency displacement (frequency shifting) according to the Cell ID of community in frequency domain resource in identical RE resource particle.As shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c), be the pilot carrier frequency shift schematic diagram of three neighbor cells, in three neighbor cells shown in Fig. 2, the Cell ID of community 1 is 0, the Cell ID of community 2 is 1, and the Cell ID of community 3 is 2, determines that the formula of pilot carrier frequency shift amount is:
mod3, wherein, v
shiftrepresent pilot carrier frequency shift amount,
represent the physics Cell ID of community, therefore, it is 0 that the Cell ID of community 1 sentences 3 remainder, and the pilot carrier frequency shift amount of community 1 is 0, and the pilot carrier frequency shift amount of community 1 is 1, and the pilot carrier frequency shift amount of community 2 is 2.As can be seen from Figure 2, community 2 is with respect to upwards 1 subcarrier of translation of community 1, and the pilot tone strong jamming between 1～community, community 3, with respect to upwards 2 subcarriers of translation of community 1, is avoided with this in community 3.
LTE-Advanced system is the backward evolution system of LTE R8 system, in LTE-Advanced system, need to define demodulated pilot signal (the Demodulated Reference Signals that supports 8 flow transmission for user, DM-RS), for the demodulation of data symbol in Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH).In 3GPP, LTE-Advanced user's DM-RS is inserted in the row of the the 6th, 7,13,14 on each PRB Resource Block OFDM symbol, as shown in the PRB content in Fig. 2, the DM-RS of 1～community, community 3 is identical, does not need to carry out frequency displacement.
In addition, LTE-Advanced system is in order to support the CQI(Channel Quality Information of high-order mimo under 8Tx antenna configuration) detect, also need to realize channel condition information (Channel State Information for the user in LTE-Advanced system, CSI) the new pilot reference signal adopting while measurement: channel condition information pilot signal (Channel State Information-Reference Signal, CSI-RS).The function class of CSI-RS is similar to the public guide frequency CRS in LTE R8, and for the measurement of LTE-A subscriber channel state information, maximum demand is supported 8 logic ports (8 CSI-RS Ports).
When being inserted in PRB Resource Block, CSI-RS pilot signal preferably can avoid the dedicated pilot signal (UE-Specific Port5-RS) sending by antenna port 5 in the common pilot signal (CRS Port0/1/2/3) by antenna port 0,1,2 or 3 transmissions, LTE R8 system in PDCCH control channel, LTE R8 system simultaneously, and the OFDM symbol at the demodulated pilot signal of LTE-Advanced (DM-RS) place, thereby by the minimum interference between user in community and inter-cell user.If the OFDM symbol at the signal place that above-mentioned needs are avoided is all got rid of, keep for only the 11st row OFDM symbol in remaining PRB of resource that CSI-RS pilot signal sends, and 12 RE of these row OFDM symbol be used for designing the CSI-RS of 8 logic ports may be not enough.
Can be for the number of resources of the RE of insertion CSI-RS pilot signal in order to increase, LTE-A user's CSI-RS can be inserted on the OFDM symbol at LTE R8 dedicated pilot UE-Specific Port5-RS place, that is: the resource particle RE not taken by UE-specific Port5-RS in the 4th, 10 row OFDM symbols, and the RE not taken by the DM-RS in UE-Specific Port5-RS and LTE-A system in the 7th, 13 row OFDM symbols.
Can increase although insert CSI-RS on the OFDM symbol at LTE R8 dedicated pilot UE-Specific Port5-RS place the resource quantity of inserting CSI-RS, can bring following problem:
On identical RE, there is strong jamming in the pilot tone for fear of neighbor cell, the RE of carrying UE-Specific Port5-RS will carry out pilot carrier frequency shift according to the Cell ID of community on frequency domain, if but insert after CSI-RS on the OFDM symbol at UE-Specific Port5-RS place in the PRB of Yi Ge community, may cause again the strong jamming between the UE-Specific Port5-RS after CSI-RS and the pilot carrier frequency shift of insertion.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus for CSI-RS Resources allocation, and a kind of method and apparatus that sends CSI-RS, there is strongly disturbing problem to solve between the UE-Specific Port5-RS after CSI-RS and the pilot carrier frequency shift that causes insertion after inserting CSI-RS on the OFDM symbol at the UE-Specific Port5-RS place in the PRB of community.
Be a method for CSI-RS Resources allocation, described method comprises:
In the Physical Resource Block PRB of Target cell, select the resource particle RE of carrying CSI-RS;
Determine the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
The RE that carries the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
Send a method of CSI-RS, described method comprises:
In the Physical Resource Block PRB of Target cell, select the resource particle RE of carrying CSI-RS;
Determine the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
The RE that carries the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS;
The RE of the carrying CSI-RS of the base station of indicating target community after by the frequency displacement obtaining sends CSI-RS to UE, and the RE of the carrying UE-Specific Port5-RS of the base station of indicating target community after by the frequency displacement obtaining sends UE-Specific Port5-RS to UE.
Be an equipment for CSI-RS Resources allocation, described equipment comprises:
Resource selection module, for the resource particle RE of the Physical Resource Block PRB selection carrying CSI-RS in Target cell;
Frequency shift amount determination module, for determining the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
Frequency displacement module, carry out frequency displacement for the RE that Target cell PRB is carried to the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 according to definite pilot carrier frequency shift amount, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
Send an equipment of CSI-RS, described equipment comprises:
Resource selection module, for the resource particle RE of the Physical Resource Block PRB selection carrying CSI-RS in Target cell;
Frequency shift amount determination module, for determining the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
Frequency displacement module, carry out frequency displacement for the RE that Target cell PRB is carried to the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 according to definite pilot carrier frequency shift amount, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS;
Indicating module, the RE of the carrying CSI-RS of the base station that is used to indicate Target cell after by the frequency displacement obtaining sends CSI-RS to UE, and the RE of the carrying UE-Specific Port5-RS of the base station of indicating target community after by the frequency displacement obtaining sends UE-Specific Port5-RS to UE.
Because the RE of carrying UE-Specific Port5-RS carries out frequency displacement according to the definite pilot carrier frequency shift amount of the Cell ID of Target cell, in the embodiment of the present invention, the RE that carries CSI-RS in PRB is also carried out to frequency displacement according to the definite pilot carrier frequency shift amount of the Cell ID of community, the RE that is to say carrying CSI-RS is identical with the pilot carrier frequency shift amount that the RE of carrying UE-Specific Port5-RS carries out frequency displacement, therefore, not disturbing between the RE of the carrying UE-Specific Port5-RS after RE and the frequency displacement of the carrying CSI-RS after frequency displacement.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that inserts pilot signal in the each RE of PRB in background technology;
Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) are the pilot carrier frequency shift schematic diagram of three neighbor cells in background technology;
Fig. 3 is the method schematic diagram for CSI-RS Resources allocation in the embodiment of the present invention one;
Fig. 4 is the schematic diagram that can carry the RE of CSI-RS in the PRB of Target cell in the embodiment of the present invention one;
Fig. 5 is the another kind of method schematic diagram for CSI-RS Resources allocation in the embodiment of the present invention one;
Fig. 6 is the method schematic diagram that sends CSI-RS in the embodiment of the present invention two;
Fig. 7 (a), Fig. 7 (b) and Fig. 7 (c) are the PRB schematic diagram of three neighbor cells in the embodiment of the present invention three;
Fig. 8 (a), Fig. 8 (b) and Fig. 8 (c) are the PRB schematic diagram of three neighbor cells in the embodiment of the present invention four;
Fig. 9 (a), Fig. 9 (b) and Fig. 9 (c) are the PRB schematic diagram of three neighbor cells in the embodiment of the present invention five;
Figure 10 is the device structure schematic diagram for CSI-RS Resources allocation in the embodiment of the present invention six;
Figure 11 is the device structure schematic diagram that sends CSI-RS in the embodiment of the present invention seven.
Embodiment
In order to realize the object of the invention, it is CSI-RS Resources allocation and the scheme that sends CSI-RS by the resource of distributing to UE that the embodiment of the present invention proposes a kind of, calculate resource in the PRB pilot carrier frequency shift amount on frequency domain according to the Cell ID of community, the RE resource of carrying CSI-RS in LTE-A system is carried out to frequency displacement according to the pilot carrier frequency shift amount calculating again, because the RE resource of carrying CSI-RS adopts identical frequency displacement rule to carry out pilot carrier frequency shift with the resource of carrying UE-Specific Port5-RS, therefore, interference between UE-Specific Port5-RS after CSI-RS and the frequency displacement of effectively having avoided causing due to the RE frequency displacement of carrying UE-Specific Port5-RS.
Below in conjunction with Figure of description, the embodiment of the present invention is described in detail.
As shown in Figure 3, for being the method for CSI-RS Resources allocation in the embodiment of the present invention one, said method comprising the steps of:
Step 101: the RE that selects carrying CSI-RS in the PRB of Target cell.
In this step, Target cell can be the Serving cell of a certain UE, can be also the cooperation district of this UE, can also be the neighbor cell adjacent with the Serving cell of UE.
As shown in Figure 4, for carrying the schematic diagram of RE resource of CSI-RS in the PRB of Target cell, as can be seen from Figure 4, the RE in the PRB of Target cell is used for carrying following signal:
1, the RE of first three OFDM is used for carrying PDCCH resource;
2, the 1st, 2,5,8,9,12 of PRB OFDM symbols, wherein part RE is for carrying the CRS Port0/1/2/3-RS of LTE R8 system;
3, part RE is for carrying the UE-Specific Port5-RS of LTE R8 system;
4, part RE is for carrying the DM-RS of LTE-A system.
RE in the PRB of Target cell can be for carrying CSI-RS except other RE for above-mentioned 4 kinds of signals.Can be according to the needs of real resource configuration, from can carry the RE of CSI-RS, select part or all of RE to carry CSI-RS.In the present embodiment, selection for carrying the RE that the RE of CSI-RS can be the OFDM at UE-Specific Port5-RS or DM-RS place, the RE selecting will avoid the RE at UE-Specific Port5-RS or DM-RS place.
If Target cell is Yi Ge community in multiple neighbor cells, can be that CSI-RS distributes RE according to the mode of step 101 by the each community in multiple neighbor cells, and the pattern of the RE of each community selection be identical.
Step 102: the pilot carrier frequency shift amount of determining Target cell according to the Cell ID of Target cell.
In this step, can be according to formula
mod3 determines the pilot carrier frequency shift amount of Target cell.
Step 103: the RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
The pilot carrier frequency shift amount of for example Target cell is 1, the RE of the carrying CSI-RS after frequency displacement compared with before frequency displacement by the subcarrier that moves up on frequency domain.
Particularly, this step can realize in such a way:
First, preset a benchmark community, the pilot carrier frequency shift amount of this benchmark community can be 0,1 or 2, and the pilot carrier frequency shift amount of supposing in this step benchmark community is 0.
Then,, by poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of Target cell and benchmark community, according to the difference obtaining, the RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community.
Finally, the RE that carries CSI-RS in the PRB obtaining after frequency displacement is carried to the RE of CSI-RS in the PRB after the frequency displacement of Target cell.
In this step, because Target cell is identical with the CSI-RS pattern of the PRB of benchmark community before carrying out frequency displacement, therefore, in this step, calculate after the difference of the pilot carrier frequency shift amount of Target cell and the pilot carrier frequency shift amount of benchmark community, also can carry out frequency displacement to the RE that carries CSI-RS in the PRB of Target cell according to difference.
In the present embodiment one, by the scheme of step 101～step 103, RE to carrying CSI-RS carries out frequency displacement according to the pilot carrier frequency shift amount of community, make RE in the PRB of community as much as possible for carrying in the situation of CSI-RS, avoided the interference between the UE-Specific Port5-RS after CSI-RS and frequency displacement that the frequency displacement of the RE of carrying UE-Specific Port5-RS causes.
In the scheme of the present embodiment one, except the RE of carrying CSI-RS being carried out frequency displacement according to the definite pilot carrier frequency shift amount of step 102, can also carry out frequency displacement to the RE of carrying UE-Specific Port5-RS according to definite pilot carrier frequency shift amount, as shown in Figure 5, on the basis of step 101～step 103, can further include following steps:
Step 104: the RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount.
Corresponding with step 103, the specific implementation of this step is:
By poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of Target cell and benchmark community, according to the difference obtaining, the RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries UE-Specific Port5-RS in the PRB obtaining after frequency displacement is carried to the RE of UE-Specific Port5-RS in the PRB after the frequency displacement of Target cell.
In the present embodiment, except the RE of carrying UE-Specific Port5-RS need to carry out frequency displacement, other RE such as carrying CRS Port0/1/2/3-RS also need to carry out frequency displacement, but because the RE of carrying CSI-RS may be positioned at same OFDM with the RE of carrying UE-Specific Port5-RS, therefore, the technological means that the RE of carrying UE-Specific Port5-RS carries out frequency displacement has only been described emphatically here.
In the scheme of the embodiment of the present invention one, increase after step 104, can find out more intuitively: the RE of carrying CSI-RS has carried out frequency displacement with the RE of carrying UE-Specific Port5-RS according to identical frequency displacement rule, even insert after CSI-RS on the OFDM symbol at the UE-Specific Port5-RS place in the PRB of Yi Ge community, the interference of the UE-Specific Port5-RS after CSI-RS and the frequency displacement that also can effectively avoid causing due to the UE-Specific Port5-RS frequency displacement of neighbor cell.
Embodiment bis-:
The embodiment of the present invention two has proposed the method for CSI-RS of transmission a kind of, and as shown in Figure 6, described method comprises:
Step 201: the RE that selects carrying CSI-RS in the PRB of Target cell.
Step 202: the pilot carrier frequency shift amount of determining Target cell according to the Cell ID of Target cell.
Step 203: the RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
Step 201～step 203 is identical with the step 101～step 103 in embodiment mono-, after step 203, can also continue to carry out the RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement step according to definite pilot carrier frequency shift amount.
Step 204: the RE of the carrying CSI-RS of the base station of indicating target community after by the frequency displacement obtaining sends CSI-RS to UE.
The embodiment of the present invention two is on the basis of embodiment mono-, and the base station of Target cell sends CSI-RS by the resource of distributing to CSI-RS to UE.Further, the RE of the carrying UE-Specific Port5-RS of base station that can indicating target community in step 204 after by frequency displacement sends UE-Specific Port5-RS to UE.
Due in the time distributing RE resource for CSI-RS, RE to carrying CSI-RS has carried out frequency displacement according to the Cell ID of community, therefore, between UE-Specific Port5-RS after CSI-RS and frequency displacement after frequency displacement, do not interfere with each other, can be correctly to UE descending transmission CSI-RS and UE-Specific Port5-RS.
In addition, Target cell may be the Serving cell that receives the UE ownership of CSI-RS, may be also the community adjacent with the Serving cell of this UE, according to different situations, selects the operation of the RE that carries CSI-RS as follows in the PRB of Target cell:
If Target cell is the Serving cell of UE, in the PRB of definite this Target cell, can carry the RE of CSI-RS, and according to the pattern (Pattern) of setting, from the RE that can carry CSI-RS determining, select the RE of part or all of RE as carrying CSI-RS.
If Target cell is the neighbor cell adjacent with Serving cell, the RE of carrying CSI-RS is selected in Target cell according to the pattern identical with Serving cell (Pattern).Described identical pattern refers to: the RE quantity of selecting in the PRB of Target cell and the RE pattern (as how much distributed architectures) in PRB is identical with the RE quantity of selecting in Serving cell and the pattern of RE in PRB.
For the method for embodiment mono-and embodiment bis-is better described, the embodiment of the present invention three, embodiment tetra-and embodiment five, respectively take three neighbor cells as example, describe the scheme of carrying out CSI-RS resource distribution and sending CSI-RS in detail.
The embodiment of the present invention three, embodiment tetra-and embodiment five describe as an example of three neighbor cells example for convenience of describing, and the present invention is not limited to the situation of three neighbor cells; And, embodiment tri-, embodiment tetra-and embodiment five only illustrate the position of RE in PRB of carrying CSI-RS, but do not limit logic port (Port) quantity wherein comprising, do not limit orthogonal multiplex mode or compound mode between the CSI-RS of multiple logic ports yet.Embodiment tri-, embodiment tetra-and embodiment five are just for illustrating basic skills, and the present invention is not limited to the design of these three CSI-RS.
Embodiment tri-:
In three neighbor cells of the embodiment of the present invention three, community 1 is the Serving cell of UE_A, community 2 and 3 adjacent communities, Shi Yu community 1, community.In the present embodiment, the RE of the carrying CSI-RS selecting in the PRB of community 1 is the 11st RE in OFDM.The embodiment of the present invention three is not selected the RE in the OFDM at UE-Specific Port5-RS and DM-RS place, but select the 11st OFDM in RE, in the embodiment of the present invention three, can be regarded as the mode that CSI-RS is distributed and sent to a kind of new resource that proposes, the RE of carrying CSI-RS is carried out obtaining distributing to the RE of CSI-RS after pilot carrier frequency shift, and send CSI-RS by the RE distributing.
In the 11st OFDM in the PRB of community 1, selected 8 RE for carrying CSI-RS, the label of these 8 RE is respectively a～h, and the pattern of the RE selecting in community 1 is: 8 RE in the 11st OFDM.According to the pattern of selecting RE in community 1, in community 2 and community 3, select 8 RE carrying CSI-RS of model identical (Pattern).
Suppose according to formula
mod3 calculates: the pilot carrier frequency shift amount of community 1 is 0, the pilot carrier frequency shift amount of community 2 is 1, the pilot carrier frequency shift amount of community 3 is 2, RE and other RE that need to carry out frequency displacement of the RE of the carrying CSI-RS of Jiang Sange community, carrying UE-Specific Port5-RS carry out frequency displacement according to the pilot carrier frequency shift amount of each community respectively, obtain the PRB schematic diagram of San Ge community after the frequency displacement as shown in Fig. 7 (a), Fig. 7 (b) and Fig. 7 (c).And then the base station of community 1 can be by sending CSI-RS for the RE that carries CSI-RS to UE_A in the PRB of community 1.If community 2 and community 3 are the cooperation districts that service is provided to UE simultaneously, the base station of the base station of community 2 and community 3 can be by sending CSI-RS for the RE that carries CSI-RS to UE_A in the PRB of community 2 and community 3.
Embodiment tetra-:
In three neighbor cells of the embodiment of the present invention four, community 1 is the Serving cell of UE_A, community 2 and 3 adjacent communities, Shi Yu community 1, community.In the present embodiment, the RE of the carrying CSI-RS selecting in the PRB of community 1 is 6 RE in the 4th OFDM at 6 RE in the 11st OFDM and UE-Specific Port5-RS place, the label of 6 RE in the 11st OFDM is " b, d, f, h, j, i ", and in the 4th OFDM at UE-Specific Port5-RS place, the label of 6 RE of CSI-RS is " a, c, e, g, i, k ".
The pattern of RE that CSI-RS selects in community 1 is: 6 RE in 6 RE in the 11st OFDM and the 4th OFDM at UE-Specific Port5-RS place.In community 2 and community 3, select identical pattern, 12 RE carrying CSI-RS of model identical (Pattern) are selected in Ji community 2 and community 3.
Suppose according to formula
mod3 calculates: the pilot carrier frequency shift amount of community 1 is 1, the pilot carrier frequency shift amount of community 2 is 2, the pilot carrier frequency shift amount of community 3 is 0, RE and other RE that need to carry out frequency displacement of the RE of the carrying CSI-RS of Jiang Sange community, carrying UE-Specific Port5-RS carry out frequency displacement according to the pilot carrier frequency shift amount of each community respectively, obtain the PRB schematic diagram of San Ge community after the frequency displacement as shown in Fig. 8 (a), Fig. 8 (b) and Fig. 8 (c).And then the base station of community 1 can be by sending CSI-RS for the RE that carries CSI-RS to UE_A in the PRB of community 1.If community 2 and community 3 are the cooperation districts that service is provided to UE simultaneously, the base station of the base station of community 2 and community 3 can be by sending CSI-RS for the RE that carries CSI-RS to UE_A in the PRB of community 2 and community 3.
As can be seen from Figure 8,6 RE of the 4th OFDM symbol are used for carrying CSI-RS, 3 RE are used for carrying UE-Specific Port5-RS, but the RE of the RE of carrying CSI-RS and carrying UE-Specific Port5-RS has carried out identical frequency displacement, therefore there is not stronger interference in the UE-Specific Port5-RS after CSI-RS and the frequency displacement after frequency displacement.
Embodiment five:
In three neighbor cells of the embodiment of the present invention five, community 1 is the Serving cell of UE_A, community 2 and 3 adjacent communities, Shi Yu community 1, community.In the present embodiment, the RE of the carrying CSI-RS selecting in the PRB of community 1 is 2 RE in 2 RE and the 10th OFDM in the 6th OFDM and 2 RE in the 14th OFDM symbol, the label of 2 RE in the 6th OFDM is " a, d ", the label of 2 RE in the 10th OFDM is " b, e ", and the label of 2 RE in the 14th OFDM is " c, f ".
The pattern of the RE selecting in community 1 is: 2 RE in 2 RE and the 14th OFDM in 2 RE in the 6th OFDM, the 10th OFDM.In community 2 and community 3, select identical pattern, 6 RE carrying CSI-RS of model identical (Pattern) are selected in Ji community 2 and community 3.
Suppose according to formula
mod3 calculates: the pilot carrier frequency shift amount of community 1 is 0, the pilot carrier frequency shift amount of community 2 is 1, the pilot carrier frequency shift amount of community 3 is 2, RE and other RE that need to carry out frequency displacement of the RE of the carrying CSI-RS of Jiang Sange community, carrying UE-Specific Port5-RS carry out frequency displacement according to the pilot carrier frequency shift amount of each community respectively, obtain the PRB schematic diagram of San Ge community after frequency displacement as shown in Figure 9, wherein, the RE of carrying DM-RS does not carry out frequency displacement.And then the base station of community 1 can be by sending CSI-RS for the RE that carries CSI-RS to UE_A in the PRB of community 1.If community 2 and community 3 are the cooperation districts that service is provided to UE simultaneously, the base station of the base station of community 2 and community 3 can be by sending CSI-RS for the RE that carries CSI-RS to UE_A in the PRB of community 2 and community 3.
From Fig. 9 (a), Fig. 9 (b) and Fig. 9 (c), can find out, the RE that carries CSI-RS in the 10th OFDM has carried out identical frequency displacement with the RE of carrying UE-Specific Port5-RS, therefore there is not interference in the UE-Specific Port5-RS after CSI-RS and the frequency displacement after frequency displacement.
Embodiment six:
The embodiment of the present invention six also provides a kind of equipment for CSI-RS Resources allocation, as shown in figure 10, described equipment comprises resource selection module 11, frequency shift amount determination module 12 and frequency displacement module 13, wherein: resource selection module 11 is selected the resource particle RE of carrying CSI-RS for the Physical Resource Block PRB in Target cell; Frequency shift amount determination module 12 is for determining the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell; Frequency displacement module 13 is carried out frequency displacement for the RE that Target cell PRB is carried to CSI-RS according to definite pilot carrier frequency shift amount, obtains carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
Described frequency displacement module 13 is specifically for by poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of described Target cell and benchmark community, according to the difference obtaining, the RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries CSI-RS in the PRB obtaining after frequency displacement is carried to the RE of CSI-RS in the PRB after the frequency displacement of Target cell.
Described frequency displacement module 13 is also carried out frequency displacement for the RE that the PRB of Target cell is carried to the dedicated pilot signal UE-Specific Port5-RS sending by antenna port 5 according to definite pilot carrier frequency shift amount.
Described frequency displacement module 13 is specifically for by poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of described Target cell and benchmark community, according to the difference obtaining, the RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries UE-Specific Port5-RS in the PRB obtaining after frequency displacement is carried to the RE of UE-Specific Port5-RS in the PRB after the frequency displacement of Target cell.
The embodiment of the present invention six is the equipment belonging under same inventive concept with embodiment mono-, can realize the each step in embodiment mono-scheme, the embodiment of the present invention six has been carried out overall description to the equipment for CSI-RS Resources allocation, and the equipment in the present embodiment is also not limited to comprise the logic module that can realize embodiment mono-scheme.
Embodiment seven:
The embodiment of the present invention seven also provides the equipment of a kind of CSI-RS of transmission, as shown in figure 11, described equipment comprises resource selection module 21, frequency shift amount determination module 22, frequency displacement module 23 and indicating module 24, wherein: resource selection module 21 is selected the resource particle RE of carrying CSI-RS for the Physical Resource Block PRB in Target cell; Frequency shift amount determination module 22 is for determining the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell; Frequency displacement module 23 is carried out frequency displacement for the RE that Target cell PRB is carried to CSI-RS according to definite pilot carrier frequency shift amount, obtains carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS; The RE of the carrying CSI-RS of the base station that indicating module 24 is used to indicate Target cell after by the frequency displacement obtaining sends CSI-RS to UE.
Described frequency displacement module 23 is also carried out frequency displacement for the RE that the PRB of Target cell is carried to the dedicated pilot signal UE-Specific Port5-RS sending by antenna port 5 according to definite pilot carrier frequency shift amount; The RE of the carrying UE-Specific Port5-RS of the base station that described indicating module 24 is also used to indicate Target cell after by the frequency displacement obtaining sends UE-Specific Port5-RS to UE.
Described resource selection module 21 is when being Serving cell in described Target cell, determine the RE that can carry CSI-RS in the PRB of this Target cell, and according to the pattern of setting, from the RE that can carry CSI-RS determining, select the RE of part or all of RE as carrying CSI-RS, while being the neighbor cell adjacent with Serving cell in described Target cell, according to the RE of the model selection carrying CSI-RS identical with Serving cell, wherein, Serving cell refers to the community of described UE ownership.
The embodiment of the present invention seven is the equipment belonging under same inventive concept with embodiment bis-, can realize the each step in embodiment bis-schemes, the embodiment of the present invention seven has been carried out overall description to the equipment that sends CSI-RS, and the equipment in the present embodiment is also not limited to comprise the logic module that can realize embodiment bis-schemes.
The method and apparatus providing by the embodiment of the present invention, the interference of the UE-Specific Port5-RS after CSI-RS and the frequency displacement of effectively having avoided causing due to the UE-Specific Port5-RS frequency displacement of neighbor cell; Because the interference between the pilot signal of transmission is less, therefore, can correctly transmit CSI-RS by the resource of distributing to UE.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (13)
1. be a method for channel condition information pilot signal CSI-RS Resources allocation, it is characterized in that, described method comprises:
In the Physical Resource Block PRB of Target cell, select the resource particle RE of carrying CSI-RS;
Determine the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
The RE that carries the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, make to carry in same OFDM the identical pilot carrier frequency shift amount of RE frequency displacement of RE and the carrying UE-Specific Port5-RS of CSI-RS, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
2. the method for claim 1, is characterized in that,
The RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement, obtains carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS, comprising:
By poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of described Target cell and benchmark community, according to the difference obtaining, the RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries CSI-RS in the PRB obtaining after frequency displacement is carried to the RE of CSI-RS in the PRB after the frequency displacement of Target cell.
3. the method for claim 1, is characterized in that,
The RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, comprising:
By poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of described Target cell and benchmark community, according to the difference obtaining, the RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries UE-Specific Port5-RS in the PRB obtaining after frequency displacement is carried to the RE of UE-Specific Port5-RS in the PRB after the frequency displacement of Target cell.
4. method as claimed in claim 2 or claim 3, is characterized in that, the pilot carrier frequency shift amount of described benchmark community is 0,1 or 2.
5. a method of transmitting channel state information pilot signal CSI-RS, is characterized in that, described method comprises:
In the Physical Resource Block PRB of Target cell, select the resource particle RE of carrying CSI-RS;
Determine the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
The RE that carries the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 in the PRB of Target cell is carried out to frequency displacement according to definite pilot carrier frequency shift amount, make to carry in same OFDM the identical pilot carrier frequency shift amount of RE frequency displacement of RE and the carrying UE-Specific Port5-RS of CSI-RS, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS;
The RE of the carrying CSI-RS of the base station of indicating target community after by the frequency displacement obtaining sends CSI-RS to UE, and the RE of the carrying UE-Specific Port5-RS of the base station of indicating target community after by the frequency displacement obtaining sends UE-Specific Port5-RS to UE.
6. method as claimed in claim 5, is characterized in that, selects the RE of carrying CSI-RS in the PRB of Target cell, comprising:
In the time that described Target cell is Serving cell, determines the RE that can carry CSI-RS in the PRB of this Target cell, and according to the pattern of setting, from the RE that can carry CSI-RS determining, select the RE of part or all of RE as carrying CSI-RS;
While being the neighbor cell adjacent with Serving cell in described Target cell, in the PRB of Target cell, select the RE of carrying CSI-RS according to the pattern identical with Serving cell;
Wherein, Serving cell refers to the community of described UE ownership.
7. method as claimed in claim 6, it is characterized in that, refer to according to the RE of the model selection carrying CSI-RS identical with Serving cell: the RE quantity of selecting in the PRB of Target cell and the pattern of RE are identical with RE quantity and the pattern of RE in PRB selected in Serving cell.
8. method as claimed in claim 6, is characterized in that, the RE that can carry CSI-RS in PRB comprises the RE except the RE of the following content of carrying in PRB:
RE on all OFDM symbols of carrying physical downlink control channel PDCCH resource;
RE on all OFDM symbols of the common pilot signal CRS Port0/1/2/3-RS sending by antenna port 0,1,2 or 3 in carrying LTE R8 system;
The RE of the dedicated pilot signal UE-Specific Port5-RS sending by antenna port 5 in carrying LTE R8 system;
The RE of the demodulated pilot signal DM-RS of carrying LTE-A system.
9. be an equipment for channel condition information pilot signal CSI-RS Resources allocation, it is characterized in that, described equipment comprises:
Resource selection module, for the resource particle RE of the Physical Resource Block PRB selection carrying CSI-RS in Target cell;
Frequency shift amount determination module, for determining the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
Frequency displacement module, carry out frequency displacement for the RE that Target cell PRB is carried to the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 according to definite pilot carrier frequency shift amount, make to carry in same OFDM the identical pilot carrier frequency shift amount of RE frequency displacement of RE and the carrying UE-Specific Port5-RS of CSI-RS, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS.
10. equipment as claimed in claim 9, is characterized in that,
Described frequency displacement module, specifically for by poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of described Target cell and benchmark community, according to the difference obtaining, the RE that carries CSI-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries CSI-RS in the PRB obtaining after frequency displacement is carried to the RE of CSI-RS in the PRB after the frequency displacement of Target cell.
11. equipment as claimed in claim 9, is characterized in that,
Described frequency displacement module, specifically for by poor the pilot carrier frequency shift amount of the pilot carrier frequency shift amount of described Target cell and benchmark community, according to the difference obtaining, the RE that carries UE-Specific Port5-RS in the PRB of Target cell is carried out to frequency displacement with respect to benchmark community, and the RE that carries UE-Specific Port5-RS in the PRB obtaining after frequency displacement is carried to the RE of UE-Specific Port5-RS in the PRB after the frequency displacement of Target cell.
The equipment of 12. 1 kinds of transmitting channel state information pilot signal CSI-RS, is characterized in that, described equipment comprises:
Resource selection module, for the resource particle RE of the Physical Resource Block PRB selection carrying CSI-RS in Target cell;
Frequency shift amount determination module, for determining the pilot carrier frequency shift amount of Target cell according to the Cell ID of Target cell;
Frequency displacement module, carry out frequency displacement for the RE that Target cell PRB is carried to the dedicated pilot signal UE-Specific Port5-RS that in the RE of CSI-RS and PRB, carrying sends by antenna port 5 according to definite pilot carrier frequency shift amount, make to carry in same OFDM the identical pilot carrier frequency shift amount of RE frequency displacement of RE and the carrying UE-Specific Port5-RS of CSI-RS, obtain carrying in the PRB of Target cell after frequency displacement the RE of CSI-RS;
Indicating module, the RE of the carrying CSI-RS of the base station that is used to indicate Target cell after by the frequency displacement obtaining sends CSI-RS to UE, and the RE of the carrying UE-Specific Port5-RS of the base station of indicating target community after by the frequency displacement obtaining sends UE-Specific Port5-RS to UE.
13. equipment as claimed in claim 12, is characterized in that,
Described resource selection module, when being Serving cell in described Target cell, determine the RE that can carry CSI-RS in the PRB of this Target cell, and according to the pattern of setting, from the RE that can carry CSI-RS determining, select the RE of part or all of RE as carrying CSI-RS, while in described Target cell being the neighbor cell adjacent with Serving cell, according to the RE of the model selection carrying CSI-RS identical with Serving cell, wherein, Serving cell refers to the community of described UE ownership.
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| JP6069216B2 (en) * | 2011-11-07 | 2017-02-01 | 株式会社Ｎｔｔドコモ | Wireless communication system, base station apparatus, mobile terminal apparatus, and interference measurement method |
| CN103391124B (en) * | 2012-05-10 | 2018-06-19 | 中兴通讯股份有限公司 | Configuration method, feedback method, base station and the terminal of channel state information |
| CN104135356B (en) * | 2012-07-26 | 2017-06-06 | 华为终端有限公司 | Control channel transmission method and apparatus |
| CN110417527B (en) * | 2012-10-19 | 2022-07-05 | 北京三星通信技术研究有限公司 | Method and device for measuring channel reference signal |
| CN104168610B (en) * | 2013-05-17 | 2017-12-15 | 华为技术有限公司 | The method, apparatus and terminal device of a kind of transmission of downlink signal |
| CN104619027B (en) | 2013-11-01 | 2020-01-14 | 中兴通讯股份有限公司 | Discovery signal processing method and base station |
| US10327198B2 (en) | 2014-05-27 | 2019-06-18 | Zte Corporation | Discovery signal processing method and base station |
| CN106160826A (en) * | 2015-04-20 | 2016-11-23 | 中国移动通信集团公司 | CSI-RS configuration and CSI feedback method, device and relevant device |
| CN106470078B (en) | 2015-08-19 | 2019-04-26 | 中国移动通信集团公司 | A kind of method, equipment and the system of channel state information measurement and feedback |
| US10756800B2 (en) | 2016-05-16 | 2020-08-25 | China Mobile Communications Group Co., Ltd. | CSI-RS configuration and CSI feedback method and apparatus, base station and user equipment |
| CN108631994B (en) | 2017-03-24 | 2022-10-28 | 中兴通讯股份有限公司 | Method and device for transmitting channel state information pilot frequency |
| CN111656856B (en) | 2018-01-30 | 2022-03-29 | 华为技术有限公司 | Signal sending method and related equipment |
| CN111148014B (en) * | 2018-11-02 | 2021-05-25 | 展讯半导体(南京)有限公司 | Configuration method and device of reference signal for positioning, network side equipment and mobile terminal |
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