CN101447815B - Shaped-beam transmission method and shaped-beam transmission device - Google Patents
Shaped-beam transmission method and shaped-beam transmission device Download PDFInfo
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Abstract
The invention discloses a shaped-beam transmission method which comprises the following steps: a system sets a subframe structure for performing shaped-beam transmission, wherein, the step further comprises the sub-steps of setting previous n OFDM symbols in the subframe for purpose of transmitting a control signaling and setting the number of OFDM symbols, which are not the previous n OFDM symbols and are used by user exclusive reference signals, and frequency domain spaces of the reference signals on the same data layer, wherein, n is not less than 1 and mapping positions of the reference signals on difference data layers are not overlapped with each other; and when the system judges to perform the shaped-beam transmission, the subframe structure is dispatched to map and transmit the reference signals. The invention also discloses a shaped-beam transmission device which comprises a subframe structure setting module, a shaped-beam judging module and a mapping and transmission executing module. In the invention, the subframe structure is newly set so that the transmission of the user exclusive reference signals can be supported and the shaped-beam transmission can be performed; and meanwhile, resource consumption of the system is reduced and the method and the device are easy to be realized.
Description
Technical field
The present invention relates to mobile communication technology, be specifically related to a kind of method and apparatus of beamforming transmission.
Background technology
At present, 3-G (Generation Three mobile communication system) standardization body (3GPP) has started Long Term Evolution (LTE) research project of 3G wireless interface technology.According to progress, defined the mapping scheme of the exclusive reference signal in residential quarter (Cell-specified Reference Signal, CsRS) in the current LTE Standard Edition.
(the Orthogonal Frequency DivisionMultiplexing of all OFDMs in the subframe structure, OFDM) symbol all is used for unicast transmission, do not support broadcasting transmitting, this moment subframe in except data symbol and control signal, can also there be two kinds with reference to signal, comprise CsRS and user-specific reference signal (UE-specified Reference Signal, UsRS), wherein CsRS takies 4 antenna ports and transmits, and described antenna port sequence number is 0,1,2,3.This moment subframe the time-frequency domain structural representation as shown in Figure 1, the mapping position of the CsRS on i antenna port of Ri among the figure (i=0,1,2,3) expression, D represents the mapping position of data-signal.
When Cyclic Prefix (CP) is set to short CP configuration, comprise 14 OFDM symbols in the subframe, as shown in Figure 1, the CsRS on the port 0,1 takies the 1st, 5,8,12 OFDM symbol in time domain at this moment, and the CsRS on the port 2,3 then takies the 2nd, 9 OFDM symbol; Be spaced apart 6 subcarriers between the reference signal on the frequency domain on the same antenna port.
When CP is set to long CP configuration, comprise 12 OFDM symbols in the subframe, as shown in Figure 1, the CsRS on the port 0,1 takies the 1st, 4,7,10 OFDM symbol in time domain at this moment, and the CsRS on the port 2,3 then takies the 2nd, 8 OFDM symbol; Be spaced apart 6 subcarriers between the reference signal on the frequency domain on the same antenna port.
Beamforming transmission is carried out in the support of existing LTE system, but the mapping mode that carries out the needed UsRS of wave beam forming does not propose concrete scheme.When utilizing above-mentioned subframe structure to carry out beamforming transmission, there are simultaneously CsRS and UsRS, at this moment, because Ri is the mapping position of CsRS among Fig. 1, UsRS is merely able to be placed in the data symbol position (the occupied position of D among Fig. 1), the resource location that will cause accordingly can be used in data symbol reduces, and obviously, the resource overhead that can cause like this being used in the subframe reference signal transmission is larger.
On the other hand, when carrying out beamforming transmission, and nonessential transmission CsRS, in order to reduce resource overhead, the position that Ri represents among Fig. 1 can be set first carry out the transmission of data symbol, then in the resource beyond the described Ri position, be provided for again transmitting the resource location of UsRS, although can reduce resource overhead like this, switch between two kinds of mapping methods but need basis whether to carry out beamforming transmission, therefore can greatly increase the complexity of system.
Therefore prior art can't provide a kind of and realize that simple and reference signal mapping takies the method for the less beamforming transmission of resource.
Summary of the invention
The embodiment of the invention provides the method and apparatus of a kind of reference signal mapping, so that low in resources consumption and realize simple when carrying out beamforming transmission.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method of beamforming transmission, the method comprises:
Set the subframe structure that is used for carrying out beamforming transmission, comprise: front n the orthogonal frequency division multiplex OFDM symbol of setting in the described subframe is used for control channel, n is natural number and n 〉=1, setting OFDM symbol numbers that the user-specific reference signal takies and the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol, and the mapping position non-overlapping copies of the reference signal of different pieces of information layer;
When beamforming transmission was carried out in judgement, scheduling was used described subframe structure to carry out the mapping of reference signal and is transmitted.
A kind of device of beamforming transmission, this device comprises: subframe structure arranges module, wave beam forming determination module and map transmission Executive Module;
Subframe structure arranges module, is used for the predetermined information that storage system is set, and this predetermined information is sent to the map transmission Executive Module; Described predetermined information is: front n the OFDM symbol of setting in the described subframe is used for control channel, n is natural number and n 〉=1, setting OFDM symbol numbers that the user-specific reference signal takies and the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol, and the mapping position non-overlapping copies of the reference signal of different pieces of information layer;
The wave beam forming determination module is judged when carrying out beamforming transmission, and notice map transmission Executive Module adopts the subframe structure of setting in the predetermined information to carry out the mapping of reference signal;
The map transmission Executive Module, the notice of received beam figuration determination module, the reference signal mapping when subframe structure in the predetermined information that module sends being set carrying out beamforming transmission according to subframe structure is also transmitted.
As seen from the above technical solutions, the method and apparatus of the beamforming transmission in the embodiment of the invention has reset new subframe structure, can support the exclusive reference signal of transmission user and carry out wave beam forming, reduced simultaneously the resource overhead of system, and realized simple.
Description of drawings
Fig. 1 is the schematic diagram of descending sub frame structure in the prior art.
Fig. 2 is the schematic flow sheet of the method for beamforming transmission in the embodiment of the invention.
Fig. 3 (a) is the schematic diagram of the new subframe structure when using short CP configuration in the embodiment of the invention.
Fig. 3 (b) is the schematic diagram of the new subframe structure when using long CP configuration in the embodiment of the invention.
Fig. 3 (c) is the schematic diagram of the new subframe structure when using mixed C P configuration in the embodiment of the invention.
Fig. 4 (a) be in the embodiment of the invention when having a data Layer, the UsRS reference signal under long CP configures is reused the schematic diagram of MBSFN reference signal mapping position.
Fig. 4 (b) be in the embodiment of the invention when having a data Layer, the UsRS reference signal under the short CP configuration is reused the schematic diagram of MBSFN reference signal mapping position.
Fig. 4 (c) be in the embodiment of the invention when having 2 data Layers, the UsRS reference signal under long CP configures is reused the schematic diagram of MBSFN reference signal mapping position.
Fig. 4 (d) be in the embodiment of the invention when having 2 data Layers, the UsRS reference signal under the short CP configuration is reused the schematic diagram of MBSFN reference signal mapping position.
Fig. 4 (e) be in the embodiment of the invention when having 3 data Layers, the UsRS reference signal under long CP configures is reused the schematic diagram of MBSFN reference signal mapping position.
Fig. 4 (f) be in the embodiment of the invention when having 3 data Layers, the UsRS reference signal under the short CP configuration is reused the schematic diagram of MBSFN reference signal mapping position.
There is a data Layer in Fig. 5 (a) in the embodiment of the invention, the UsRS reference signal under the long CP configuration takies 3 OFDM symbols, the schematic diagram of the mapping position when frequency domain interval is 4 subcarriers.
There is a data Layer in Fig. 5 (b) in the embodiment of the invention, the UsRS reference signal under the short CP configuration takies 3 OFDM symbols, the schematic diagram of the mapping position when frequency domain interval is 4 subcarriers.
There is a data Layer in Fig. 5 (c) in the embodiment of the invention, the UsRS reference signal under the long CP configuration takies 4 OFDM symbols, the schematic diagram of the mapping position when frequency domain interval is 6 subcarriers.
There is a data Layer in Fig. 5 (d) in the embodiment of the invention, the UsRS reference signal under the short CP configuration takies 4 OFDM symbols, the schematic diagram of the mapping position when frequency domain interval is 6 subcarriers.
There are 2 data Layers in Fig. 6 (a) in the embodiment of the invention, the UsRS reference signal under the long CP configuration takies 3 OFDM symbols, the schematic diagram of the mapping position the when frequency domain interval of the reference signal of same data Layer is 4 subcarriers.
There are 2 data Layers in Fig. 6 (b) in the embodiment of the invention, the UsRS reference signal under the short CP configuration takies 3 OFDM symbols, the schematic diagram of the mapping position the when frequency domain interval of the reference signal of same data Layer is 4 subcarriers.
There are 2 data Layers in Fig. 6 (c) in the embodiment of the invention, the UsRS reference signal under the long CP configuration takies 4 OFDM symbols, the schematic diagram of the mapping position the when frequency domain interval of the reference signal of same data Layer is 6 subcarriers.
There are 2 data Layers in Fig. 6 (d) in the embodiment of the invention, the UsRS reference signal under the short CP configuration takies 4 OFDM symbols, the schematic diagram of the mapping position the when frequency domain interval of the reference signal of same data Layer is 6 subcarriers.
There are 3 data Layers in Fig. 7 (a) in the embodiment of the invention, the UsRS reference signal under the long CP configuration takies 3 OFDM symbols, the schematic diagram of the mapping position the when frequency domain interval of the reference signal of same data Layer is 4 subcarriers.
There are 3 data Layers in Fig. 7 (b) in the embodiment of the invention, the UsRS reference signal under the short CP configuration takies 3 OFDM symbols, the schematic diagram of the mapping position the when frequency domain interval of the reference signal of same data Layer is 4 subcarriers.
There are 3 data Layers in Fig. 7 (c) in the embodiment of the invention, the UsRS reference signal of each data Layer under the long CP configuration takies the OFDM symbol of different numbers, the schematic diagram of a kind of mapping position the when frequency domain interval of the reference signal of same data Layer is 6 subcarriers.
There are 3 data Layers in Fig. 7 (d) in the embodiment of the invention, the UsRS reference signal of each data Layer under the short CP configuration takies the OFDM symbol of different numbers, a kind of mapping position schematic diagram the when frequency domain interval of the reference signal of same data Layer is 6 subcarriers.
Fig. 8 is the composition structural representation of the device of beamforming transmission in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
When carrying out wave beam forming, terminal need to use UsRS to carry out channel estimating, and simultaneously comprise two kind with reference to signal: CsRS and UsRS in the subframe this moment.Owing to having used UsRS, therefore can suitably reduce CsRS and even not use CsRS to reduce the resource overhead of system.In this case, a kind of new subframe structure of system definition is used for carrying out beamforming transmission.
The embodiment of the invention provides a kind of method of beamforming transmission, and the flow process of the method comprises as shown in Figure 2:
Described new subframe can be used for Single Frequency Network operation MBMS service (MultimediaBroadcast/Multicast Service Over Single Frequency Network, MBSFN), only use long CP configuration this moment, the reference signal of using in the described subframe comprises CsRS and MBSFN reference signal simultaneously; Also can be used for unicast transmission, carry out beamforming transmission, select concrete CP Configuration Type according to the size of cell coverage area this moment, and the reference signal of using in the described subframe comprises CsRS and UsRS simultaneously; In addition, when using clean culture and broadcasting transmitting simultaneously, can also mix and use long CP and short CP configuration.Therefore, the descending new subframe structure in the embodiment of the invention had both supported to carry out unicast transmission, also supported to carry out broadcasting transmitting.
Figure 3 shows that a kind of structure chart of described new subframe structure, wherein C represents the position that control signal takies, and R represents the position that the UsRS reference signal takies, and D represents the position that data symbol takies.As shown in Figure 3, the individual OFDM symbol of front n (n 〉=1) that control signal always takies in the subframe transmits, if transmission CsRS, then CsRS also transmits in described n OFDM symbol.Wherein, Fig. 3 (a) shows the subframe structure under the short CP configuration, is used for unicast transmission; Fig. 3 (b) shows the subframe structure under the long CP configuration, can be used for clean culture or MBSFN transmission; Fig. 3 (c) expression mixes uses long and short CP configuration, be clean culture and the broadcasting transmitting subframe structure when existing simultaneously, use short CP configuration in the wherein said front n OFDM symbol, be used for unicast transmission, remaining OFDM symbol uses long CP configuration, is used for the MBSFN transmission.
If step 203 user does not carry out beamforming transmission, then system uses default subframe structure to transmit.
If step 204 user carries out beamforming transmission, then system call uses new subframe structure to transmit.
When not carrying out beamforming transmission, system uses default subframe structure to transmit described in the above-mentioned flow process, and reference symbol mapping mode and the transmission means of this moment are same as the prior art, therefore no longer describe in detail;
When the user carried out beamforming transmission, system used new subframe structure to carry out beamforming transmission, can take dual mode to obtain the mapping pattern of new reference signal, comprising:
1. the mapping pattern of MBSFN reference signal in the partial reuse existing standard.
Because the frequency domain density requirements of UsRS requires lowly than MBSFN reference signal, therefore can the mapping position of MBSFN reference signal shine upon UsRS in existing standard.As shown in Figure 4, wherein S1 represents the mapping position of the UsRS on the data Layer 1, and S2 represents the mapping position of the UsRS on the data Layer 2, and S3 represents the mapping position of the UsRS on the data Layer 3, and D represents the position that data symbol takies.Fig. 4 (a) shows when having a data Layer, the reference signal mapping pattern under the long CP configuration, the reference signal mapping pattern when Fig. 4 (b) configures for the short CP of employing; When having two data Layers, Fig. 4 (c) shows the reference signal mapping pattern under the long CP configuration, and Fig. 4 (d) is for adopting the reference signal mapping pattern of short CP configuration; When having three data Layers, Fig. 4 (e) is the reference signal mapping pattern under the long CP configuration, and Fig. 4 (f) is for adopting the reference signal mapping pattern of short CP configuration.
As seen from Figure 4, in the subframe structure of above-mentioned each reference signal mapping pattern, the mapping position of UsRS is the mapping position of MBSFN reference signal; Simultaneously, keeping the frequency domain interval between the reference signal of same data Layer is 6 subcarriers, and reference signal takies 3 OFDM symbols.As seen, frequency domain interval and the shared OFDM symbol numbers of reference signal of this moment all are the mapping patterns of having reused the MBSFN reference signal.
2. redesign the mapping pattern of UsRS.
Can also the mapping mode of reference signal be redesigned, the frequency domain interval between the reference signal of same data Layer is reset, the number of the OFDM symbol that reference signal is shared also resets.
For example: the mapping pattern that reference signal when having a data Layer has been shown among Fig. 5, Fig. 5 (a) is depicted as in the frame structure of long CP configuration, reference signal takies 3 OFDM symbols, and the frequency domain interval between reference signal is when being 4 subcarriers, the mapping pattern of reference signal.The short CP configuration of Fig. 5 (b) expression is lower, and reference signal takies 3 OFDM symbols, the mapping pattern when frequency domain interval is 4 subcarriers.Fig. 5 (c) shows the mapping pattern of the reference signal under long CP configuration, and arrange reference signal and take 4 OFDM symbols this moment, and frequency domain interval is 6 subcarriers.Fig. 5 (d) then represents the mapping pattern of the reference signal under the short CP configuration, reference signal is set takies 4 OFDM symbols, and frequency domain interval is 6 subcarriers.
When there being a plurality of data Layers, such as when having 2 data Layers, the mapping pattern of reference signal as shown in Figure 6.The long CP configuration of Fig. 6 (a) expression is lower, and every layer of reference signal takies 3 OFDM symbols, and the frequency domain interval that the same layer reference signal is set is 4 subcarriers.Fig. 6 (b) is that short CP configuration is lower, and every layer of reference signal takies 3 OFDM symbols, and it is 4 subcarriers that the same layer frequency domain interval is set.Fig. 6 (c) is lower for long CP configuration, every layer of reference signal is set takies 4 OFDM symbols, and frequency domain interval is 6 subcarriers.Fig. 6 (d) is that short CP configuration is lower, every layer of reference signal is set takies 4 OFDM symbols, and frequency domain interval is 6 subcarriers.
When having for another example 4 data Layers, the mapping pattern of reference signal as shown in Figure 7.S1 represents the mapping position of the UsRS on the data Layer 1, and S2 represents the mapping position of the UsRS on the data Layer 2, and S3 represents the mapping position of the UsRS on the data Layer 3, and S4 represents the mapping position of the UsRS on the data Layer 4.
The long CP configuration of Fig. 7 (a) expression is lower, and every layer of reference signal takies 3 OFDM symbols (all reference signals take 6 OFDM symbols altogether), and the frequency domain interval that the same layer reference signal is set is 4 subcarriers.Fig. 7 (b) is that short CP configuration is lower, and every layer reference signal takies 3 OFDM symbols (all reference signals take 6 OFDM symbols altogether), and the frequency domain interval that the same layer reference signal is set is 4 subcarriers.Fig. 7 (c) is illustrated under the long CP configuration, and the reference signal that arranges every layer takies a plurality of OFDM symbols, and the frequency domain interval of same layer reference signal is 6 subcarriers.Fig. 7 (d) is that short CP configuration is lower, and the reference signal that arranges every layer takies a plurality of OFDM symbols, and the frequency domain interval of same layer reference signal is 6 subcarriers.
Need to prove, the mapping pattern of all multi-layer datas described in the embodiment of the invention only is schematic diagram.In actual applications, the data of every one deck all are separate on time domain.When the reference signal of every one deck was shone upon, the OFDM symbol numbers that not necessarily occupies was identical.Take Fig. 7 (c) as example: when carrying out the mapping of ground floor data, mapping reference signal in the position that described S1 represents, and the represented position of S2, S3, S4 all is used for data-mapping this moment; Similarly, when carrying out the mapping of second layer data, mapping reference signal in the position that described S2 represents, and the represented position of S1, S3, S4 all is used for data-mapping this moment.Simultaneously, S1 and S2 have occupied 4 OFDM symbols, and S3 and S4 have occupied 2 OFDM symbols.Fig. 7 (c) just is identified at all possible mapping position in 4 data Layers on the figure and describes, and need to not shine upon according to this pattern when not being illustrated in a mapping process.Easily understand, for the mapping pattern of other multi-layer data in the embodiment of the invention, above-mentioned explanation is applicable too.
In addition, during the mapping pattern of described redesign UsRS, be not mapped on the overlapping position as long as guarantee the reference signal of different pieces of information layer in principle, the number of the OFDM symbol that takies as for reference signal, and the frequency domain interval of same layer reference signal can arbitrarily be set satisfying on the basis of described principle.In actual applications, usually set reference signal and take 3～4 OFDM sign bits, the frequency domain interval of same layer reference signal can be 3～6 subcarriers, and distributes uniformly in the time-frequency scope of a subframe with reference to the mapping position of signal as far as possible.
As seen from the above, the method of the beamforming transmission in the embodiment of the invention can be supported the exclusive reference signal of transmission user and carry out wave beam forming, owing to must not transmit CsRS in the described front n OFDM symbol, therefore resource consumption is also lower, and realizes simple.
The embodiment of the invention also provides a kind of device of beamforming transmission, and as shown in Figure 8, this device comprises: subframe structure arranges module 810, wave beam forming determination module 820 and map transmission Executive Module 830;
Subframe structure arranges module 810, is used for the predetermined information that storage system is set, and this predetermined information is sent to map transmission Executive Module 820; Described predetermined information is: front n the OFDM symbol of setting in the described subframe is used for control channel, n 〉=1, setting OFDM symbol numbers that the user-specific reference signal takies and the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol, and the mapping position non-overlapping copies of the reference signal of different pieces of information layer;
Wave beam forming determination module 820 is judged when carrying out beamforming transmission, and notice map transmission Executive Module 830 adopts the subframe structure of setting in the predetermined information to carry out the mapping of reference signal;
Map transmission Executive Module 830, the notice of received beam figuration determination module 820, the reference signal mapping when subframe structure in the predetermined information of 810 transmissions of mould being set according to subframe structure carrying out beamforming transmission is also transmitted.
Described subframe structure arranges in the module 810 and comprises: the OFDM symbol takies number setup unit 811, frequency domain interval setup unit 812 and mapping position record cell 813;
The OFDM symbol takies number setup unit 811, front n the OFDM symbol of setting in the described subframe is used for control channel, n is natural number and n 〉=1, outside a described front n OFDM symbol, set the OFDM symbol numbers that the user-specific reference signal takies, described set information is sent to frequency domain interval setup unit 812;
Frequency domain interval setup unit 812, the number of shared OFDM symbol when receiving the OFDM symbol and taking the reference signal mapping of the data Layer that number setup unit 811 sends, further set the frequency domain interval between the same layer reference signal, described set information is sent to mapping position record cell 813;
Described mapping position record cell 813, receive the set information that frequency domain interval setup unit 812 sends, obtain the subframe structure that is used for beamforming transmission of default according to set information, when beamforming transmission is carried out in judgement, described subframe structure is sent to map transmission Executive Module 830 as predetermined information.
Preferably, described OFDM symbol takies number setup unit 811 and can also be further used for setting in described n the OFDM symbol and comprise CsRS, and described set information is sent to frequency domain interval setup unit 812.
The embodiment of the invention is not done restriction for concrete mapping ruler; easily understand; the above only is preferred embodiment of the present invention; be not be used to limiting spirit of the present invention and protection range; the equivalent variations that any those of ordinary skill in the art make or replacement all should be considered as being encompassed within protection scope of the present invention.
Claims (7)
1. the method for a beamforming transmission is characterized in that, the method comprises:
Set the subframe structure that is used for carrying out beamforming transmission, comprise: front n the orthogonal frequency division multiplex OFDM symbol of setting in the described subframe is used for control channel, n is natural number and n 〉=1, setting OFDM symbol numbers that the user-specific reference signal takies and the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol, and the mapping position non-overlapping copies of the reference signal of different pieces of information layer;
When beamforming transmission was carried out in judgement, scheduling was used described subframe structure to carry out the mapping of reference signal and is transmitted.
2. method according to claim 1 is characterized in that, comprises setting OFDM symbol numbers that the user-specific reference signal takies and the method for the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol:
The user-specific reference signal of setting beamforming transmission is shone upon in the mapping position of Single Frequency Network operation MBMS service MBSFN reference signal, and the frequency domain interval of setting between same data Layer reference signal is 6 subcarriers.
3. method according to claim 1 is characterized in that, comprises setting OFDM symbol numbers that the user-specific reference signal takies and the method for the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol:
The user-specific reference signal of setting beamforming transmission takies that n OFDM symbol any a plurality of OFDM symbols afterwards shine upon in the subframe, and the frequency domain interval of setting between same data Layer reference signal is any a plurality of subcarrier.
4. method according to claim 1 is characterized in that, can further include the exclusive reference signal in residential quarter in described n the OFDM symbol.
5. the device of a beamforming transmission is characterized in that, this device comprises: subframe structure arranges module, wave beam forming determination module and map transmission Executive Module;
Subframe structure arranges module, is used for the predetermined information that storage system is set, and this predetermined information is sent to the map transmission Executive Module; Described predetermined information is: front n the OFDM symbol of setting in the described subframe is used for control channel, n is natural number and n 〉=1, setting OFDM symbol numbers that the user-specific reference signal takies and the frequency domain interval between same data Layer reference signal outside the described front n OFDM symbol, and the mapping position non-overlapping copies of the reference signal of different pieces of information layer;
The wave beam forming determination module is judged when carrying out beamforming transmission, and notice map transmission Executive Module adopts the subframe structure of setting in the predetermined information to carry out the mapping of reference signal;
The map transmission Executive Module, the notice of received beam figuration determination module, the reference signal mapping when subframe structure in the predetermined information that module sends being set carrying out beamforming transmission according to subframe structure is also transmitted.
6. device according to claim 5 is characterized in that, described subframe structure arranges in the module and comprises: the OFDM symbol takies the number setup unit, frequency domain interval setup unit and mapping position record cell;
The OFDM symbol takies the number setup unit, front n the OFDM symbol of setting in the described subframe is used for control channel, the OFDM symbol numbers that the user-specific reference signal takies is set in n 〉=1 outside a described front n OFDM symbol, described set information is sent to the frequency domain interval setup unit;
The frequency domain interval setup unit, the number of shared OFDM symbol when receiving the OFDM symbol and taking the reference signal mapping of the data Layer that the number setup unit sends, further set the frequency domain interval between the same layer reference signal, described set information is sent to the mapping position record cell;
Described mapping position record cell, receive the set information that the frequency domain interval setup unit sends, obtain the subframe structure that is used for beamforming transmission of default according to set information, when beamforming transmission is carried out in judgement, described subframe structure is sent to the map transmission Executive Module as predetermined information.
7. device according to claim 6 is characterized in that, described OFDM symbol takies the number setup unit and is further used for setting in described n the OFDM symbol and comprises the exclusive reference signal in residential quarter, and described set information is sent to the frequency domain interval setup unit.
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| CN101616360B (en) * | 2009-07-24 | 2012-05-09 | 中兴通讯股份有限公司 | Method and system for sending positioning reference signal |
| CN101626620B (en) * | 2009-08-07 | 2014-03-12 | 中兴通讯股份有限公司 | Transmitting method of reference signal |
| CN101719888B (en) * | 2009-11-10 | 2013-03-20 | 中兴通讯股份有限公司 | System and method for mapping reference signal sequence in long term evolution-advanced (LTE-A) system |
| CN103024917B (en) * | 2011-09-26 | 2015-07-15 | 普天信息技术研究院有限公司 | Method for reducing spending of downlink measurement signal under transmission mode |
| WO2014015800A1 (en) * | 2012-07-24 | 2014-01-30 | 电信科学技术研究院 | Method and device for transmitting downlink user equipment specific demodulation reference signal |
| CN106612540B (en) * | 2015-10-23 | 2020-12-15 | 华为技术有限公司 | Downlink synchronization method, user equipment and base station |
| CN112615706B (en) * | 2016-01-15 | 2022-08-19 | 中兴通讯股份有限公司 | Signal sending method, signal receiving method and device |
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