CN102195741A - Method and device for transmitting channel state information reference signal (CSI-RS) - Google Patents

Method and device for transmitting channel state information reference signal (CSI-RS) Download PDF

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Publication number
CN102195741A
CN102195741A CN2010101222858A CN201010122285A CN102195741A CN 102195741 A CN102195741 A CN 102195741A CN 2010101222858 A CN2010101222858 A CN 2010101222858A CN 201010122285 A CN201010122285 A CN 201010122285A CN 102195741 A CN102195741 A CN 102195741A
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China
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csi
rs
port
frequency domain
subscriber equipment
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CN2010101222858A
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Chinese (zh)
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李强
万蕾
范霄安
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华为技术有限公司
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Priority to CN2010101222858A priority Critical patent/CN102195741A/en
Publication of CN102195741A publication Critical patent/CN102195741A/en

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Abstract

The invention discloses a method and device for transmitting a channel state information reference signal (CSI-RS). The method for transmitting the CSI-RS comprises the following steps of: determining the port quantities and the frequency domain displacement of CSI-RS patterns of user equipment, wherein the CSI-RS patterns refer to CSI-RS four-port patterns and a CSI-RS eight-port pattern, the CSI-RS four-port patterns are same and are separated orthogonally in a frequency domain multiplexing mode according to different frequency domain displacements, and the CSI-RS eight-port pattern is formed by combining the CSI-RS four-port patterns of any two adjacent cells; and informing the user equipment of the port quantities and the frequency domain displacement of the CSI-RS patterns to make the user equipment perform downlink channel estimation according to the port quantities and the frequency domain displacement of the CSI-RS patterns. Due to the adoption of the method and the device, the transmission of the CSI-RS can be realized.

Description

The transmission method of channel state information reference signals and device

Technical field

The present invention relates to communication technical field, particularly a kind of transmission method of channel state information reference signals and device.

Background technology

In LTE-A (Long Time Evolution Advanced, the senior evolution of Long Term Evolution) system, introduce new downlink reference signal CSI-RS (Channel State Information Reference signal, channel state information reference signals).

Discussed in the standard at present: the density of CSI-RS for example, for 2,4 or 8 ports, can be 1 RE (Resourceelement, Resource Unit), 1 port (port), or 1PRB (Physical Resource Block, Physical Resource Block); The cycle of CSI-RS, such as, can be the integral multiple of 5ms; The available resources of CSI-RS need to consider to hide control channel, and LTER8, the DMRS of R9 (De Modulation Reference Signal, demodulated reference signal).

But standard is the multiplex mode etc. of in position, pattern and the sub-district of clearly newly-increased CSI-RS and minizone not.Need to realize the transmission of CSI-RS.

Summary of the invention

The transmission method of the downlink reference signal that the embodiment of the invention provides and device can be realized the transmission of CSI-RS.

The channel state information reference signals transmission method that the embodiment of the invention provides, can realize by following scheme:

Determine the port number and the frequency domain shift of the CSI-RS pattern of subscriber equipment, wherein, the CSI-RS pattern is default CSI-RS four port patterns and CSI-RS eight port patterns, CSI-RS four port patterns are identical, adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift), CSI-RS eight port patterns are that the CSI-RS four port patterns of any two adjacent sub-districts merge formation;

Notify the port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment, so that this subscriber equipment carries out the down channel estimation according to the port number and the frequency domain shift of described CSI-RS pattern.

The subscriber equipment that the embodiment of the invention provides can be achieved through the following technical solutions:

This subscriber equipment comprises: acquiring unit, be used to obtain the CSI-RS pattern, the CSI-RS pattern is default CSI-RS four port patterns and CSI-RS eight port patterns, CSI-RS four port patterns are identical, adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift), CSI-RS eight port patterns are that the CSI-RS four port patterns of any two adjacent sub-districts merge formation;

Determining unit is used for determining the port number and the frequency domain shift of the CSI-RS pattern of subscriber equipment;

Notification unit is used to notify the port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment, estimates so that this subscriber equipment carries out down channel according to the port number of described CSI-RS pattern and frequency domain shift.

The transmission method of the downlink reference signal that the embodiment of the invention provides and device, downlink reference signal between a plurality of sub-districts is mutually orthogonal, the CSI RS pilot frequency design of 4 ports and 8 ports is mutually nested, the pattern of any two 4 port sub-districts can be merged into single cell patterns of one 8 port, the transparent CoMP of convenient realization.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The CSI-RS transmission method schematic diagram that Fig. 1 provides for the embodiment of the invention one;

The CSI-RS pattern schematic diagram that provides of the embodiment of the invention two is provided Fig. 2;

The CSI-RS pattern schematic diagram that provides of the embodiment of the invention three is provided Fig. 3;

The CSI-RS pattern schematic diagram that provides of the embodiment of the invention four is provided Fig. 4; With

The CSI-RS transmitting device structural representation that provides of the embodiment of the invention is provided Fig. 5.

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.

As shown in Figure 1, the CSI-RS transmission method schematic diagram for the embodiment of the invention one provides comprises:

101, determine the port number and the frequency domain shift of the CSI-RS pattern of subscriber equipment, wherein, the CSI-RS pattern is default CSI-RS four port patterns and CSI-RS eight port patterns, CSI-RS four port patterns are identical, adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift), CSI-RS eight port patterns are that the CSI-RS four port patterns of any two adjacent sub-districts merge formation;

102, notify the port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment, so that this subscriber equipment carries out the down channel estimation according to the port number and the frequency domain shift of described CSI-RS pattern.

Pass through the present invention program, downlink reference signal between a plurality of sub-districts is mutually orthogonal, the CSI RS pilot frequency design of 4 ports and 8 ports is mutually nested, and the pattern of any two 4 port sub-districts can be merged into single cell patterns of one 8 port, the transparent CoMP of convenient realization.

In embodiment two, in wireless communication system, such as, a base station covers three neighbor cells.The CSI-RS pattern of three neighbor cells as shown in Figure 2.The CSI-RS pattern of these three neighbor cells can be preset in base station side and user equipment side.

Four port CSI RS patterns are shown in the left-half among Fig. 2, and three neighbor cells adopt four identical port CSIRS patterns, 4 just adjacent RE.Four port CSI RS patterns of three neighbor cells adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift).The CSI-RS of sub-district 1 takies preceding 4 RE of each PRB; 4 RE in the middle of the CSI-RS of sub-district 2 uses; 4 RE behind the CSI-RS of sub-district 3.The CSI-RS that has so just guaranteed different districts does not collide and produces interference mutually.The pattern of eight port CSI RS has three kinds of different patterns equally shown in the right half part of Fig. 2, the pattern of this eight port CSI RS can be made of any two four ports CSIRS pattern merging among Fig. 2.

Two ports in each group adopt CDM to distinguish, and for example, port 0 adopts frequency expansion sequence { 1,1,1, the 1} correspondence expands on corresponding 4 RE, and port one adopts frequency expansion sequence { 1,-1,1 ,-1} correspondence expands on corresponding 4 RE, port 2 adopts frequency expansion sequence { 1,1 ,-1,-1} correspondence expands on corresponding 4 RE, and port 3 adopts frequency expansion sequence { 1,1,1 ,-1} correspondence expands on corresponding 4 RE, has guaranteed the orthogonality of same group of interior 4 CSI RS pilot tones like this.The mode of CDM comprises ZC sequence of orthogonal spreading sequence, cyclic shift or the like.

In the present embodiment, because the CSI-RS of different districts is nonoverlapping, simultaneously, the UE of different districts need measure the CSI RS of respective cell.The RSRP that eNB reports according to UE (Reference Signal Received Power, Reference Signal Received Power) or other metrical information determine that it still is the multi-cell downlink channel that a UE need measure single cell downlink channel.For example, in the present embodiment, eNB judges that UE1 is served by cell 2, only needs to measure single cell downlink channel of cell 2; UE2 is CoMP (Coordinated multipoint processing coordinates multiple spot and handles) UE, by cell1, cell 3 common service, needs to measure the down channel from these two sub-districts.

In the present embodiment, need measure the down channel of single sub-district when subscriber equipment, the base station need notify two parameters of UE to determine CSI RS pilot frequency locations.A parameter is a CSI RS port number, and such as being 4, the port number can be by high-rise notice.Second parameter is frequency domain shift (shift), for frequency domain shift (shift), can adopt the mode of shining upon with the implicit expression of cell_id binding to notify UE.That is to say, the position of the CSI-RS that each sub-district sends, comprise cycle and pattern, interrelate with the cell_id of this sub-district, the cell_id of the sub-district of eNB notice UE, UE maps out different reference signal positions according to different cell_id, in corresponding position the down channel of this sub-district is estimated.Specifically, with reference to shown in Figure 2, the possible pattern of 4 port CSI-RS has 3 kinds, and the cell_id_1 of network allocation sub-district 1 is 0.UE just can obtain the position of the CSI-RS of sub-district 1 by following simple modulo operation after having received cell_id_1:

cell_id_1mod?3=0

Notice that this advice method requirement eNB is the requirement of considering all cell reference signals quadratures in the same set distributing cell_id.

For CoMP UE, need to measure the CSI RS pilot tone of adjacent two sub-districts.ENB need notify this UE following two parameters: 1) CSI RS port number, and in the present embodiment, because UE need measure two sub-districts totally 8 antenna ports, so the port number is 8; 2) frequency domain shift; Previous parameter is notified by high-level signaling.For a back parameter, adopt the mode of shining upon to notify this CoMP UE with the implicit expression of virtual_cell_id binding.That is to say, at per two sub-districts a virtual_cell_id is set, these two sub-districts merge position and this virtual_cell_id of CSI RS figure crime interrelate, eNB notifies this CoMP UE, UE maps out different reference signal positions according to different virtual_cell_id, in corresponding position the down channel of this sub-district is estimated.Specifically, with reference to shown in Figure 2, the possible pattern of 8 port CSI-RS has 3 kinds, and the virtual_cell_id_12 that network allocation sub-district 1,2 merges is 0, the virtual_cell_id23 that sub-district 2,3 merges is 1, and the virtual cell_id13 that sub-district 1,3 merges is 2.In the time of in the middle of this CoMPUE is positioned at sub-district 2,3, need measure the CSI RS pilot tone of sub-district 2,3 simultaneously, the virtual cell_id23=1 that eNB notifies this CoMPUE to serve, this CoMP UE just can obtain the position of the CSI-RS of sub-district 2 by following simple modulo operation after having received virtual cell_id23 and port number 8:

virtual_cell_id_23mod?3=1

The CSI RS pattern of having formed single sub-district 8 ports respectively from the CSI RS pattern of these two sub-districts, UE can think own is like this had 8 CSI RS port list sub-district services by one.Notice that this advice method requirement eNB considers the requirement of all virtual cell reference signal quadratures that three cell combination form when distributing virtual_cell_id.

UE is in the position that has obtained CSI-RS with after the port number that needs to measure, at the down channel of this location estimation respective cell.

Pass through the present invention program, downlink reference signal between a plurality of sub-districts is mutually orthogonal, the CSI RS pilot frequency design of 4 ports and 8 ports is mutually nested, and the pattern of any two 4 port sub-districts can be merged into single cell patterns of one 8 port, the transparent CoMP of convenient realization.

In the embodiment of the invention three, in wireless communication system, such as, a base station covers three neighbor cells.The CSI-RS pattern of three neighbor cells as shown in Figure 3.The CSI-RS pattern of these three neighbor cells can be preset in base station side and user equipment side.

Four port CSI RS patterns are shown in the left-half among Fig. 3, three different districts adopt identical CSI RS pattern, 4 just adjacent RE, four port CSI RS patterns of three neighbor cells adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift).The CSI-RS of sub-district 1 takies preceding 4 RE; 4 RE in the middle of the CSI-RS of sub-district 2 uses; The CSI-RS of sub-district 3 takies back 4 RE.The CSI-RS that has so just guaranteed different districts does not collide and produces interference mutually.In addition, the pattern of eight port CSI RS has three kinds of different patterns equally shown in the right half part of Fig. 3, and the pattern of this eight port CSI RS can be made of any two four ports CSI RS pattern merging among Fig. 3.

Shown in Fig. 3 left-half, each four port CSI RS pattern is divided into two groups, such as 0/1 1 groups of ports, 2/3 1 groups of ports, two ports of every group take 2 adjacent RE pilot signal transmitteds, such as the part of thick frame among Fig. 3, adopt FDM to distinguish between group and the group.For example, CSI RS port 0,1 shared preceding two RE of sub-district 1 send pilot tone, and port 2,3 uses latter two RE.Guaranteed the orthogonality between CSI RS group and the group like this.Two ports in each group adopt CDM to distinguish, for example, { the 11} correspondence expands on corresponding two RE port 0 employing frequency expansion sequence, and port one adopts frequency expansion sequence { 1,-1} correspondence expands on corresponding two RE, has guaranteed the orthogonality of same group of interior two CSI RS pilot tones like this.The mode of CDM comprises ZC sequence of orthogonal spreading sequence, cyclic shift or the like.

The pattern of single sub-district 8 CSI RS port is shown in Fig. 3 right half part, and 8 ports take 8 adjacent RE, are divided into 4 groups, 0/1 1 groups of ports, 2/3 1 groups of ports, 4/5 1 groups of ports, 6/7 1 groups of ports.Two ports of every group take 2 adjacent RE pilot signal transmitteds (part of thick frame among the figure), adopt FDM to distinguish between group and the group.For example, CSI RS port 0,1 shared preceding two RE send pilot tone, and port 2,3 uses latter two RE.Guaranteed the orthogonality between CSI RS group and the group like this.Two ports in each group adopt CDM to distinguish, for example, { 1 1} correspondence expands on corresponding two RE port 0 employing frequency expansion sequence, and port one adopts frequency expansion sequence { 1,-1} correspondence expands on corresponding two RE, has guaranteed the orthogonality of same group of interior two CSI RS pilot tones like this.The mode of CDM comprises ZC sequence of orthogonal spreading sequence, cyclic shift or the like.

In the present embodiment, because the CSI-RS of different districts is nonoverlapping, simultaneously, the UE of different districts need measure the CSI RS of respective cell, for CoMP UE, also needs to measure the CSI RS of a plurality of sub-districts.ENB determines that according to RSRP or other metrical information that UE reports it still is the multi-cell downlink channel that a UE need measure single cell downlink channel.For example, in the present embodiment, eNB judges that UE1 is served by cell 1, only needs to measure single cell downlink channel of cell 1; UE2 is CoMP UE, by cell 2, cell 3 common service, needs to measure the down channel from these two sub-districts.

In the present embodiment, need two parameters of notice UE1 to determine the CSI RS pilot frequency locations that it need be measured: 1) CSIRS port number (4); 2) frequency domain shift; Previous parameter is notified by high-level signaling.For a back parameter, adopt the mode of shining upon to notify UE with the implicit expression of cell_id binding.That is to say, the position (comprising cycle and pattern) of the CSI-RS that each sub-district sends directly interrelates with the cell_id of this sub-district, the cell_id of eNB notice UE1 Serving cell, UE maps out different reference signal positions according to different cell_id, in corresponding position the down channel of this sub-district is estimated.Specifically, with reference to shown in Figure 1, the possible pattern of 4 port CSI-RS has 3 kinds, and the cell_id_1 of network allocation sub-district 1 is 0.UE1 just can obtain the position of the CSI-RS of sub-district 2 by following simple modulo operation after having received cell_id_1:

cell_id_1mod?3=0

Notice that this advice method requirement eNB is the requirement of considering all cell reference signals quadratures in the same set distributing cell_id.

For UE 2, need to measure the CSI RS pilot tone of adjacent two sub-districts, therefore need the CSI RS position of notice UE sub-district 2 and sub-district 3.In the present embodiment, UE does not need to know two sub-district pilot frequency locations separately, eNB only need notify this UE following two parameters: 1) CSI RS port number, in the present embodiment, pointed as step 1, the CSI RS pattern of any two sub-districts can be merged into the CSI RS pattern of single sub-district 8 ports, so the configured port number is 8; 2) frequency domain shift.Previous parameter is notified by high-level signaling.For a back parameter, pointed as step 1, the pattern of single sub-district 8 antennas has only three kinds, can adopt the mode of shining upon with the implicit expression of virtual_cell_id binding to notify UE.That is to say, combination at per two sub-districts is provided with a virtual_cell_id, these two sub-districts merge position and this virtual_cell_id of CSI RS pattern directly interrelate, eNB notifies UE, UE maps out different reference signal positions according to different virtual_cell_id, in corresponding position the down channel of this sub-district is estimated.Specifically, shown in figure 3 right half parts, the possible pattern of 8 port CSI-RS has 3 kinds, and the virtual_cell_id_12 that network allocation sub-district 1,2 merges is 0, the virtual_cell_id23 that sub-district 2,3 merges is 1, and the virtual cell_id13 that sub-district 1,3 merges is 2.In the time of in the middle of UE2 is positioned at sub-district 2,3, need measure the CSI RS pilot tone of sub-district 2,3 simultaneously, the eNB notice virtual cell_id23=1 that UE served, UE1 just can obtain the position of the CSI-RS of sub-district 2 by following simple modulo operation after having received virtual cell_id23 and port number 8:

virtual_cell_id_23mod?3=1

The CSI RS pattern of having formed single sub-district 8 ports respectively from the CSI RS pattern of these two sub-districts, UE can think own is like this had 8 CSI RS port list sub-district services by one.Notice that this advice method requirement eNB considers the requirement of all virtual cell reference signal quadratures that three cell combination form when distributing virtual_cell_id.

UE is in the position that has obtained CSI-RS with after the port number that needs to measure, at the down channel of this location estimation respective cell.

Pass through the present invention program, downlink reference signal between a plurality of sub-districts is mutually orthogonal, the CSI RS pilot frequency design of 4 ports and 8 ports is mutually nested, and the pattern of any two 4 port sub-districts can be merged into single cell patterns of one 8 port, the transparent CoMP of convenient realization.And the multiplex mode of employing FDM+CDM, reduced every port PA (poweramplifier on the one hand, power amplifier) requirement, the dynamic range of PA can drop to 6dB from 9dB, on the other hand, owing to each port has been expanded on two adjacent RE, has guaranteed that the orthogonality of CDM is not subjected to too much influence.

In embodiment four, in wireless communication system, such as, a base station covers three neighbor cells.The CSI-RS pattern of three neighbor cells as shown in Figure 4.The CSI-RS pattern of these three neighbor cells can be preset in base station side and user equipment side.

As can be seen from Figure 4, three different districts adopt identical CSI RS pattern, rely on different frequency domain shift to adopt the mode quadrature of frequency domain multiplexing (FDM) to separate.The CSI-RS that has so just guaranteed different districts does not collide and produces interference mutually.In addition, the pattern of 8 port CSI RS has three kinds of different patterns equally shown in the right half part of Fig. 4, and this pattern has guaranteed that the CSI RS pattern of any two kind of 4 port merges the CSI RS pattern that can constitute one 8 port.

Shown in Fig. 4 left-half, 4 CSI RS ports are divided into two groups, 0/1 1 groups of ports, and 2/3 1 groups of ports, two ports of every group take 2 adjacent RE pilot signal transmitteds, adopt FDM to distinguish between group and the group.For example, CSI RS port 0,1 shared preceding two RE of sub-district 1 send pilot tone, and port 2,3 uses latter two RE.Guaranteed the orthogonality between CSI RS group and the group like this.Two ports in each group adopt CDM to distinguish, for example, { the 11} correspondence expands on corresponding two RE port 0 employing frequency expansion sequence, and port one adopts frequency expansion sequence { 1,-1} correspondence expands on corresponding two RE, has guaranteed the orthogonality of same group of interior two CSI RS pilot tones like this.The mode of CDM comprises ZC sequence of orthogonal spreading sequence, cyclic shift or the like.

The pattern of single sub-district 8 CSI RS port is shown in Fig. 4 right half part, and 8 ports take 8 adjacent RE, and 8 CSIRS ports are divided into 4 groups, 0/1 1 groups of ports, 2/3 1 groups of ports, 4/5 1 groups of ports, 6/7 1 groups of ports.Two ports of every group take 2 adjacent RE pilot signal transmitteds (part of thick frame among the figure), adopt FDM to distinguish between group and the group.For example, CSI RS port 0,1 shared preceding two RE send pilot tone, and port 2,3 uses latter two RE.Guaranteed the orthogonality between CSI RS group and the group like this.Two ports in each group adopt CDM to distinguish, for example, { the 11} correspondence expands on corresponding two RE port 0 employing frequency expansion sequence, and port one adopts frequency expansion sequence { 1,-1} correspondence expands on corresponding two RE, has guaranteed the orthogonality of same group of interior two CSI RS pilot tones like this.The mode of CDM comprises ZC sequence of orthogonal spreading sequence, cyclic shift or the like.

All the other steps and embodiment three are similar.Here just do not describe in detail.

Pass through the present invention program, downlink reference signal between a plurality of sub-districts is mutually orthogonal, the CSI RS pilot frequency design of 4 ports and 8 ports is mutually nested, and the pattern of any two 4 port sub-districts can be merged into single cell patterns of one 8 port, the transparent CoMP of convenient realization.And, adopt the multiplex mode of FDM+CDM, reduced requirement (power boosting drops to 6dB from 9dB) on the one hand, on the other hand every port PA, owing to each port has been expanded on two adjacent RE, has guaranteed that the orthogonality of CDM is not subjected to too much influence.

As shown in Figure 5, the CSI-RS transmitting device structural representation that provides for the embodiment of the invention comprises:

Acquiring unit 501, be used to obtain the CSI-RS pattern, the CSI-RS pattern is default CSI-RS four port patterns and CSI-RS eight port patterns, CSI-RS four port patterns are identical, adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift), CSI-RS eight port patterns are that the CSI-RS four port patterns of any two adjacent sub-districts merge formation;

Determining unit 502 is used for determining the port number and the frequency domain shift of the CSI-RS pattern of subscriber equipment;

Notification unit 503 is used to notify the port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment, estimates so that this subscriber equipment carries out down channel according to the port number of described CSI-RS pattern and frequency domain shift.

Wherein, described CSI-RS four port patterns can be divided into two groups, two ports of every group take two adjacent Resource Unit (RE, Resource Element) sends CSI-RS, adopt frequency division multiplexing (FDM between group and the group, Frequencydivision multiplexing) multiplexing, two ports in the group adopt CDM to distinguish.

Described notification unit specifically is used for being used for notifying described subscriber equipment port number by high-level signaling when subscriber equipment need be measured single sub-district; Adopt the mode of shining upon to notify described subscriber equipment frequency domain shift with the implicit expression of cell_id binding; When subscriber equipment need be measured two sub-districts, be used for notifying described subscriber equipment port number by high-level signaling; Adopt the mode of shining upon to notify described subscriber equipment frequency domain shift with the implicit expression of virtual_cell_id binding.

Be understandable that, only be schematic in the accompanying drawing or shown in the embodiment, the presentation logic structure, the wherein said module that shows as separating component may or may not be physically to separate, the parts that show as module may be or may not be physical locations, promptly can be positioned at a place, perhaps be distributed on several network entities.

More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, description should not be construed as limitation of the present invention.

Claims (6)

1. a channel state information reference signals (CSI-RS, Channel State Information Reference signal) transmission method is characterized in that, comprising:
Determine the port number and the frequency domain shift of the CSI-RS pattern of subscriber equipment, wherein, the CSI-RS pattern is default CSI-RS four port patterns and CSI-RS eight port patterns, CSI-RS four port patterns are identical, adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift), CSI-RS eight port patterns are that the CSI-RS four port patterns of any two adjacent sub-districts merge formation;
Notify the port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment, so that this subscriber equipment carries out the down channel estimation according to the port number and the frequency domain shift of described CSI-RS pattern.
2. the method for claim 1, it is characterized in that, described CSI-RS four port patterns can be divided into two groups, two ports of every group take two adjacent Resource Unit (RE, Resource Element) sends CSI-RS, adopt frequency division multiplexing (FDM, Frequency division multiplexing) multiplexing between group and the group, two ports in the group adopt code division multiplexing (CDM, Code division multiplexing) to distinguish.
3. method as claimed in claim 1 or 2 is characterized in that,
When subscriber equipment need be measured single sub-district, the described port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment notified comprised: notify described subscriber equipment port number by high-level signaling; Adopt the mode of shining upon to notify described subscriber equipment frequency domain shift with the implicit expression of cell ID (cell_id) binding;
When subscriber equipment need be measured two sub-districts, the described port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment notified comprised: notify described subscriber equipment port number by high-level signaling; Adopt the mode of shining upon to notify described subscriber equipment frequency domain shift with the implicit expression of virtual_cell_id binding.
4. a channel state information reference signals (CSI-RS, Channel State Information Reference signal) transmitting device comprises:
Acquiring unit, be used to obtain the CSI-RS pattern, the CSI-RS pattern is default CSI-RS four port patterns and CSI-RS eight port patterns, CSI-RS four port patterns are identical, adopt the mode quadrature of frequency domain multiplexing (FDM) to separate according to different frequency domain shift (shift), CSI-RS eight port patterns are that the CSI-RS four port patterns of any two adjacent sub-districts merge formation;
Determining unit is used for determining the port number and the frequency domain shift of the CSI-RS pattern of subscriber equipment;
Notification unit is used to notify the port number and the frequency domain shift of the described CSI-RS pattern of this subscriber equipment, estimates so that this subscriber equipment carries out down channel according to the port number of described CSI-RS pattern and frequency domain shift.
5. device as claimed in claim 4, it is characterized in that, described CSI-RS four port patterns can be divided into two groups, two ports of every group take two adjacent Resource Unit (RE, Resource Element) sends CSI-RS, adopt frequency division multiplexing (FDM, Frequency division multiplexing) multiplexing between group and the group, two ports in the group adopt code division multiplexing (CDM, Code division multiplexing) to distinguish.
6. as claim 4 or 5 described devices, it is characterized in that,
Described notification unit specifically is used for being used for notifying described subscriber equipment port number by high-level signaling when subscriber equipment need be measured single sub-district; Adopt the mode of shining upon to notify described subscriber equipment frequency domain shift with the implicit expression of cell ID (cell_id) binding; When subscriber equipment need be measured two sub-districts, be used for notifying described subscriber equipment port number by high-level signaling; Adopt the mode of shining upon to notify described subscriber equipment frequency domain shift with the implicit expression of virtual_cell_id binding.
CN2010101222858A 2010-03-10 2010-03-10 Method and device for transmitting channel state information reference signal (CSI-RS) CN102195741A (en)

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WO2013044754A1 (en) * 2011-09-29 2013-04-04 华为技术有限公司 Method for allocating csi-rs when multiple access points exist, base station, and access point
WO2013044411A1 (en) * 2011-09-29 2013-04-04 Nokia Siemens Network Oy Resource aggregation in wireless communications
CN103249150A (en) * 2012-02-03 2013-08-14 中兴通讯股份有限公司 Downlink pilot frequency collocation method, base station and mobile terminal
WO2013131401A1 (en) * 2012-03-09 2013-09-12 中兴通讯股份有限公司 Channel state information processing method, base station and user equipment
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