CN102469059A - Method and device for carrying demodulation reference signal - Google Patents
Method and device for carrying demodulation reference signal Download PDFInfo
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- CN102469059A CN102469059A CN2010105559409A CN201010555940A CN102469059A CN 102469059 A CN102469059 A CN 102469059A CN 2010105559409 A CN2010105559409 A CN 2010105559409A CN 201010555940 A CN201010555940 A CN 201010555940A CN 102469059 A CN102469059 A CN 102469059A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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Abstract
The invention offers a method and device for carrying a demodulation reference signal. The method includes: in a long term evolution of time division duplex LTE TDD, with configuration parameters for given special subframes, selecting one or two orthogonal frequency division multiplexing OFDM symbols to carry a demodulation reference signal in a time domain corresponding to the scheduling of a physical resource block by each special subframe, wherein the configuration parameters for the given special subframes include: the ratio configuration of numbers of OFDM symbols occupied by a downside of pilot time send DwPTS, a guard period GP and UpPTS in the special subframe parameter configuration of a normal cyclic prefix being 6:6:2 or 6:7:1; and/or the ratio configuration of numbers of OFDM symbols occupied by DwPTS, GP and UpPTS in the special subframe parameter configuration of an extended cyclic prefix being 5:5:2 or 5:7:1. The present invention can reduce the complexity of UE, adapting an increased configuration of the special subframe.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of demodulated reference signal bearing method and device.
Background technology
Special time slot in the TD-SCDMA system is a fixed configurations; And the special subframe of TD-LTE system can be selected as required flexibly; During enforcement, make two system business time slots and special time slot all need to realize that up-downgoing is not disturbed mutually between two systems synchronously, therefore as far as possible; Should be according to the business time-slot configuration of two systems and the special time slot situation of TD-SCDMA, the configuration of the special subframe of choose reasonable TD-LTE." TS3.211 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation " in; to the configuration of special subframe among the LTE-TDD specifically shown in table one, wherein in the table indication be the number of the shared OFDM symbol of descending pilot frequency sending time slots DwPTS, protection period GP and ascending pilot frequency sending time slots UpPTS under different configurations.
The configuration of special subframe (length of DwPTS/GP/UpPTS) among the table one LTE TDD
During 1: 3 coupling of TD-SCDMA 2: 4 and TD-LTE, according to the configuration mode among the existing LTE (LTE-A), in order to realize disturbing to reduce synchronously of two systems; LTE TDD has only the configuration 0 and configuration 5 in the employing table 1, and promptly corresponding special subframe configuration parameter is 3: 10: 1 or 3: 9: 2, and this moment, DwPTS all only took 3 symbols; The symbol that does not have the bearer service signal, the DwPTS under this kind configuration can not transport services, are 2: 2 configuring condition with respect to up/descending UL/DL; Though UL/DL increased by 1 downlink business sub-frame data symbol at 1: 3 o'clock, because the restriction of the proportioning of special subframe, DwPTS has reduced a plurality of symbols that can be used for transfer of data; Therefore; Peak value/average throughput all has greater loss, and whole efficiency is on the low side, and is as shown in Figure 1.
Peak value/average throughput all has greater loss during to TD-SCDMA in the correlation technique and TD-LTE coupling, and the whole efficiency problem of lower does not propose effective solution at present as yet.
Summary of the invention
Main purpose of the present invention is to provide a kind of demodulated reference signal bearing method and device, and peak value/average throughput all has greater loss, the whole efficiency problem of lower when solving in the above-mentioned correlation technique TD-SCDMA and TD-LTE coupling at least.
According to an aspect of the present invention; A kind of demodulated reference signal bearing method is provided; Comprise: in time division duplex long evolving system LTE TDD; Under the configuration parameter of given special subframe, on the corresponding time domain of each special subframe scheduling Physical Resource Block, select one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal; Wherein, the configuration parameter of said given special subframe comprises: the special subframe parameter configuration is that the OFDM number of symbols ratio that descending pilot frequency sending time slots DwPTS, protection period GP and ascending pilot frequency sending time slots UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix; And/or the special subframe parameter configuration is that the OFDM number of symbols ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix.
More excellent; The said scheduling on the corresponding time domain of Physical Resource Block at each special subframe selected one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal; Comprise:, select to be positioned at the 2nd, 3 OFDM symbol or the 3rd, 5 OFDM symbol or the 2nd, 5 the said demodulated reference signal of OFDM symbols carry when the said given special subframe configuration parameter special subframe parameter configuration that is normal cyclic prefix is an OFDM number of symbols ratio that DwPTS, GP and UpPTS take when being configured to 6: 6: 2 or 6: 7: 1.
More excellent, the frequency domain interval of demodulated reference signal on same OFDM symbol that same port is corresponding is 4 number of sub-carrier.
More excellent, when the number of layers of transmission smaller or equal to 2 the time, adopt on the time domain direction code division multiplexing mode to carry out multiplexing to port 7 and port 8.
More excellent; When the number of layers of transmission greater than 2 and smaller or equal to 4 the time; The mode that code division multiplexing on employing time domain direction between the different port combines with frequency division multiplexing is carried out multiplexing, and wherein, port 7 carries out code division multiplexing with port 8; Port 9 carries out code division multiplexing with port one 0, adopts frequency division multiplexing between first group of port being made up of port 7,8 and the second group of port being made up of port 9,10.
More excellent, as to form by port 7, the 8 corresponding frequency domain position m of first group of port
1With the corresponding frequency domain position m of second group of port that forms by port 9,10
2Relation comprise: m
2=m
1+ 1 or m
2=m
1-1.
More excellent; The said scheduling on the corresponding time domain of Physical Resource Block at each special subframe selected one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal; Comprise: when the said given special subframe configuration parameter special subframe parameter configuration that is extended cyclic prefix is an OFDM number of symbols ratio that DwPTS, GP and UpPTS take when being configured to 5: 5: 2 or 5: 6: 1, selects to be positioned at the 2nd or the 4th OFDM symbol or the 2nd, 4 OFDM symbol and be used to carry said demodulated reference signal.
More excellent, when selecting to be positioned at said the 2nd, 4 the said demodulated reference signal of OFDM symbols carry, adopt the mode of code division multiplexing on the time domain direction that port 7 and port 8 are carried out code division multiplexing.
More excellent, adopt the mode of frequency domain direction code division multiplexing on two adjacent number of sub-carrier, port 7 and port 8 to be carried out code division multiplexing, wherein, the two adjacent groups subcarrier spacing is 1 or 4 number of sub-carrier.
According to a further aspect in the invention, a kind of demodulated reference signal bogey is provided, has comprised: determination module, be used for system at LTE TDD, the configuration parameter of confirming special subframe is the configuration parameter of given special subframe; Wherein, the configuration parameter of said given special subframe comprises: the special subframe parameter configuration is that the OFDM number of symbols ratio that descending pilot frequency sending time slots DwPTS, protection period GP and ascending pilot frequency sending time slots UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix; And/or the special subframe parameter configuration is that the OFDM number of symbols ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix; Select module, the configuration parameter of the special subframe that is used for disposing according to determination module is selected one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal on the corresponding time domain of each special subframe scheduling Physical Resource Block.
More excellent, said determination module is further used for confirming that the configuration parameter of said given special subframe is that the special subframe parameter configuration is that the OFDM number of symbols length ratio that DwPTS, GP and UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix; Said selection module is further used for: select to be positioned at the 2nd, 3 OFDM symbol or the 3rd, 5 OFDM symbol or the 2nd, 5 the said demodulated reference signal of OFDM symbols carry.
More excellent, also comprise: first Multiplexing module, be used for when the number of layers of transmission smaller or equal to 2 the time, adopt on the time domain direction code division multiplexing mode to carry out multiplexing to port 7 and port 8.
More excellent; Also comprise: second Multiplexing module, be used for number of layers when transmission greater than 2 and smaller or equal to 4 the time, carry out multiplexing in the mode that adopts the code division multiplexing on the time domain direction to combine between the different port with frequency division multiplexing; Wherein, Port 7 carries out code division multiplexing with port 8, and port 9 carries out code division multiplexing with port one 0, adopts frequency division multiplexing between first group of port being made up of port 7,8 and the second group of port being made up of port 9,10.
More excellent, second Multiplexing module is further used for: definite corresponding frequency domain position m of first group of port that is made up of port 7,8
1With the corresponding frequency domain position m of second group of port that forms by port 9,10
2Relation comprise: m
2=m
1+ 1 or m
2=m
1-1.
More excellent, said determination module is further used for: confirm that said given special subframe configuration parameter is that the special subframe parameter configuration is that the OFDM number of symbols length ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix; Said selection module is further used for: select to be positioned at the 2nd or the 4th OFDM symbol or the 2nd, 4 OFDM symbol and be used to carry said demodulated reference signal.
More excellent; Also comprise: the 3rd Multiplexing module; When being used to select to be positioned at the said demodulated reference signal of the 2nd, 4 OFDM symbols carry; Adopt the mode of code division multiplexing on the time domain direction that port 7 and port 8 are carried out code division multiplexing, and multiplexing result is mapped on the OFDM symbol that is positioned at the 2nd, 4.
More excellent, also comprise: the 4th Multiplexing module, be used to adopt the mode of frequency domain direction code division multiplexing on two adjacent number of sub-carrier, port 7 and port 8 to be carried out code division multiplexing, wherein, said two adjacent groups subcarrier spacing is 1 or 4 number of sub-carrier.
The method that adopts the embodiment of the invention to provide; When the configuration parameter of special subframe changes; On the corresponding time domain of each special subframe scheduling Physical Resource Block, select one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal, adopt CDM (code division multiplexing, code division multiplexing) and CDM+FDM (code division multiplexing+frequency division multiplexing; Code division multiplexing+frequency division multiplexing) multiplex mode carries out multiplexing; Thereby keep having compatible pattern form as far as possible, reduce the complexity of UE, adapt to the configuration that special subframe increases with other configurations.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 be according to the TD-SCDMA of correlation technique 2: 4 during with 1: 3 coupling of TD-LTE DwPTS can not transport service cause the flow chart of peak loss;
Fig. 2 is first kind of structural representation of the DMRS pattern that defines among the current R10 according to the embodiment of the invention;
Fig. 3 is second kind of structural representation of the DMRS pattern that defines among the current R10 according to the embodiment of the invention;
Fig. 4 is the third structural representation of the DMRS pattern that defines among the current R10 according to the embodiment of the invention;
Fig. 5 is the 4th a kind of structural representation of the DMRS pattern that defines among the current R10 according to the embodiment of the invention;
Fig. 6 is the 5th a kind of structural representation of the DMRS pattern that defines among the current R10 according to the embodiment of the invention;
Fig. 7 is the process chart according to the demodulated reference signal bearing method of the embodiment of the invention;
Fig. 8 is a demodulated reference signal pattern when being configured to 4/5/6 OFDM symbol according to DwPTS in the special subframe of the embodiment of the invention;
Fig. 9 is the another kind of demodulated reference signal pattern when being configured to 6 OFDM symbols according to DwPTS in the special subframe of the embodiment of the invention;
Figure 10 is according to being 2 OCC carries out code division multiplexing to two demodulated reference signal ports (port 7, port 8) sketch map through length on the employing time domain direction of the embodiment of the invention;
Figure 11 be according to the embodiment of the invention based on being 2 OCC carries out the mode of code division multiplexing to two demodulated reference signal ports (port 7, port 8) first kind of sketch map through length on the frequency domain direction;
Figure 12 be according to the embodiment of the invention based on being 2 OCC carries out the mode of code division multiplexing to two demodulated reference signal ports (port 7, port 8) second kind of sketch map through length on the frequency domain direction;
Figure 13 be according to the embodiment of the invention based on being 2 OCC carries out the mode of code division multiplexing to two demodulated reference signal ports (port 7, port 8) the third sketch map through length on the frequency domain direction;
Figure 14 be according to the embodiment of the invention based on being 2 OCC carries out the mode of code division multiplexing to two demodulated reference signal ports (port 7, port 8) the 4th kind of sketch map through length on the frequency domain direction;
Figure 15 is first kind of structural representation according to the demodulated reference signal bogey of the embodiment of the invention;
Figure 16 is second kind of structural representation according to the demodulated reference signal bogey of the embodiment of the invention;
Figure 17 is the third structural representation according to the demodulated reference signal bogey of the embodiment of the invention;
Figure 18 is the 4th a kind of structural representation according to the demodulated reference signal bogey of the embodiment of the invention;
Figure 19 is the 5th a kind of structural representation according to the demodulated reference signal bogey of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Mention in the correlation technique, during 1: 3 coupling of TD-SCDMA 2: 4 and TD-LTE, according to the configuration mode among the existing LTE (LTE-A); In order to realize disturbing to reduce synchronously of two systems, LTE TDD has only the configuration 0 and configuration 5 in the employing table 1, and this moment, DWPTS all only took 3 symbols; The symbol that does not have the bearer service signal, the DWPTS under this kind configuration can not transport services, are 2: 2 configuring condition with respect to UL/DL; Though UL/DL increased by 1 downlink business sub-frame data symbol at 1: 3 o'clock; But because the restriction of the proportioning of special subframe, DWPTS has reduced a plurality of symbols that can be used for transfer of data, therefore; Peak value/average throughput all has greater loss, and whole efficiency is on the low side.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of solution thinking: in table 1, increase different configurations to normal CP (cyclicprefix, Cyclic Prefix); For example, increasing DwPTS: GP: UpPTS is the demand of configuration in 6: 6: 2, and under expansion CP; Increase DwPTS: GP: UpPTS is 5: 5: 2 a demand, but in the present agreement, DMRS (demodulation reference signal; Demodulated reference signal); Do not consider the support to the configuration that increases, the DMRS pattern that defines among the current R10 such as Fig. 2 are to shown in Figure 6, and Fig. 2 is the DMRS pattern of the OFDM symbol of normal sub-frames among the existing normal CP; Fig. 3 is the DMRS pattern that special subframe DwPTS is configured to 11 or 12 OFDM symbols; Fig. 4 is the DMRS pattern that special subframe DwPTS is configured to 11 or 12 OFDM symbols, wherein, and left oblique line finger tip mouth 7,8,11,13 corresponding reference signal RE positions; Parallel lines finger tip mouth 9,10,12,14 corresponding reference signal RE positions are increased the weight of right oblique line and are referred to the public reference signal position.The DMRS pattern of normal sub-frames when Fig. 5 is expansion CP, Fig. 6 is the DMRS pattern that special subframe DwPTS is configured to 8/9/10 OFDM symbol, wherein, left oblique line finger tip mouth 7,8 corresponding reference signal RE positions are increased the weight of right oblique line and are referred to the public reference signal position.
When number of layers smaller or equal to 4 the time, adopting length is 2 OCC (orthogonal cover code, quadrature mask), greater than 4 o'clock, adopting length was 4 OCC sign indicating number; When number of layers greater than 4 smaller or equal to 8 the time, adopting length is 4 OCC; For expansion CP, the maximum number of layers of supporting is 2.Can't support new configuration mode in conjunction with the visible current DMRS of Fig. 2 to Fig. 6.
Solve thinking based on this, the embodiment of the invention provides a kind of demodulated reference signal bearing method, and handling process is as shown in Figure 7, comprising:
The method that adopts the embodiment of the invention to provide; When the configuration parameter of special subframe changes; On the corresponding time domain of each special subframe scheduling Physical Resource Block, select one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal, adopt CDM (code division multiplexing, code division multiplexing) and CDM+FDM (code division multiplexing+frequency division multiplexing; Code division multiplexing+frequency division multiplexing) multiplex mode carries out multiplexing; Thereby keep having compatible pattern form as far as possible, reduce the complexity of UE, adapt to the configuration that special subframe increases with other configurations.
More excellent; In one embodiment; When the configuration parameter of special subframe is that DwPTS, GP and UpPTS take in the special subframe of normal cyclic prefix OFDM number of symbols ratio is when being configured to 6: 6: 2 or 6: 7: 1; Selection is positioned at the 2nd, 3 OFDM symbol or the 3rd, 5 OFDM symbol or the 2nd, 5 OFDM symbols carry demodulated reference signal, and the frequency domain interval of demodulated reference signal on same OFDM symbol that same port is corresponding is 4 number of sub-carrier.
During enforcement, when the number of layers of transmission smaller or equal to 2 the time, adopt on the time domain direction code division multiplexing mode to carry out multiplexing to port 7 and port 8; When the number of layers of transmission greater than 2 and smaller or equal to 4 the time; Mode adopting the code division multiplexing on the time domain direction to combine with frequency division multiplexing between the different port is carried out multiplexing; Wherein, port 7 carries out code division multiplexing with port 8, and port 9 carries out code division multiplexing with port one 0; Adopt frequency division multiplexing between first group of port forming by port 7,8 and the second group of port forming by port 9,10, the corresponding frequency domain position m of first group of port that forms by port 7,8
1With the corresponding frequency domain position m of second group of port that forms by port 9,10
2Relation comprise: m
2=m
1+ 1 or m
2=m
1-1.
More excellent; In another embodiment; When the configuration parameter of special subframe is DwPTS, GP and UpPTS take in the extended cyclic prefix special subframe an OFDM number of symbols length ratio when being configured to 5: 5: 2 or 5: 6: 1, select to be positioned at the 2nd OFDM symbol or the 4th OFDM symbol or the 2nd, 4 OFDM symbol and be used to carry demodulated reference signal.
During enforcement, when selecting to be positioned at the 2nd, 4 OFDM symbols carry demodulated reference signal, adopt the mode of code division multiplexing on the time domain direction that port 7 and port 8 are carried out code division multiplexing, and multiplexing result is mapped on the OFDM symbol that is positioned at the 2nd, 4.
When implementing, can also adopt the mode of frequency domain direction code division multiplexing on two adjacent number of sub-carrier, port 7 and port 8 to be carried out code division multiplexing, wherein, the two adjacent groups subcarrier spacing is 1 or 4 number of sub-carrier.
For method that the embodiment of the invention is provided is explanatorily clearer detailed, describe with several concrete embodiment at present.
Embodiment one
When the normal cyclic prefix configuration parameter changes; Demodulated reference signal pattern when demodulated reference signal pattern configuration mode (rank1～4), Fig. 8 have illustrated that DwPTS is configured to 4/5/6 OFDM symbol in the special subframe is under this mode; Demodulated reference signal be configured in Physical Resource Block right the 2nd; On 3 OFDM symbols, and the identical pattern configuration mode of the last employing of each PRB, the subcarrier spacing of the adjacent demodulated reference signal of same port on frequency domain is 4.Another kind of demodulated reference signal pattern when Fig. 9 has illustrated that DwPTS is configured to 6 OFDM symbols in the special subframe; This moment demodulated reference signal be configured on the 3rd, 5 the right OFDM symbol of Physical Resource Block or the 2nd, 5 OFDM symbol on; Each PRB goes up the identical configuration mode of same employing, and the subcarrier spacing of the adjacent demodulated reference signal of same port on frequency domain also is 4.
When the number of layers of transmission smaller or equal to 2 the time, to use length be 2 OCC carries out multiplexing to the demodulated reference signal of two ports (port 7, port 8) through the mode of code division multiplexing on time domain.And on adjacent DMRS reference signal subcarrier to the OCC sign indicating number reversing that overturns; Like Fig. 8, shown in 9, wherein
When the number of layers of transmission more than or equal to 3 and smaller or equal to 4 the time; Mode through code division multiplexing on the time domain direction is carried out multiplexing to port 7 and port 8; Mode through code division multiplexing on the time domain direction is carried out multiplexing to port 9 and port one 0, the mode through frequency division between two groups is multiplexing.
Preferably, under this configuration, the supporting layer number is not greater than 4 transmission.
Embodiment two
When the extended cyclic prefix configuration parameter changes; Demodulated reference signal is positioned on the 2nd, 4 the OFDM symbol; The subcarrier spacing of the adjacent demodulated reference signal of same port on frequency domain is 2, and a kind of preferred configuration is that to adopt on the time domain direction through length be that 2 OCC carries out code division multiplexing to two demodulated reference signal ports (port 7, port 8), and is shown in figure 10; Under this mode, can keep having compatible preferably with the configuration of other special subframes.
Figure 11,12 and Figure 13,14 provided a kind of based on being 2 OCC carries out code division multiplexing to two demodulated reference signal ports (port 7, port 8) mode through length on the frequency domain direction respectively.Under Figure 11, the mode shown in 12, demodulated reference signal takies an OFDM symbol (on OFDM symbol 2 or the OFDM symbol 4), and the two adjacent groups demodulated reference signal be spaced apart 1 number of sub-carrier.In Figure 13, the mode shown in 14; Demodulated reference signal takies two OFDM symbol (OFDM symbols 2; 4); And on the same OFDM symbol two adjacent groups demodulated reference signal be spaced apart 4 number of sub-carrier, and the pairing sub-carrier positions of demodulated reference signal on two OFDM symbols carried out that the position is staggered handles, thereby makes that demodulated reference signal distributes more even on the frequency domain.And Figure 11,12 and Figure 13,14 mode under, then can better support high speed UE.
Based on same inventive concept, the embodiment of the invention also provides a kind of demodulated reference signal bogey, specifically sees also Figure 15, comprising:
In one embodiment, determination module 1501 can be further used for confirming that the configuration parameter of given special subframe is that the special subframe parameter configuration is that the OFDM number of symbols length ratio that DwPTS in the normal cyclic prefix of special subframe, GP and UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix;
In one embodiment, shown in figure 16, the demodulated reference signal bogey can also comprise:
In one embodiment, shown in figure 17, the demodulated reference signal bogey can also comprise:
In one embodiment, second Multiplexing module 1701 can be further used for: definite corresponding frequency domain position m of first group of port that is made up of port 7,8
1With the corresponding frequency domain position m of second group of port that forms by port 9,10
2Relation comprise: m
2=m1+1 or m
2=m
1-1.
In one embodiment, determination module 1501 can be further used for: confirm that given special subframe configuration parameter is that the special subframe parameter configuration is that the OFDM number of symbols length ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix;
In one embodiment, shown in figure 18, the demodulated reference signal bogey can also comprise:
The 3rd Multiplexing module 1801; When being used to select to be positioned at the 2nd, 4 OFDM symbols carry demodulated reference signal; Adopt the mode of code division multiplexing on the time domain direction that port 7 and port 8 are carried out code division multiplexing, and multiplexing result is mapped on the OFDM symbol that is positioned at the 2nd, 4.
In one embodiment, shown in figure 19, the demodulated reference signal bogey can also comprise:
The 4th Multiplexing module 1901 is used to adopt the mode of frequency domain direction code division multiplexing on two adjacent number of sub-carrier, port 7 and port 8 to be carried out code division multiplexing, and wherein, the two adjacent groups subcarrier spacing is 1 or 4 number of sub-carrier.
From above description, can find out that the present invention has realized following technique effect:
The method that adopts the embodiment of the invention to provide; When the configuration parameter of special subframe changes; On time domain, select one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal, the multiplex mode of employing CDM and CDM+FDM carries out multiplexing, thereby keeps having compatible pattern form with other configurations as far as possible; Reduce the complexity of UE, adapt to the configuration that special subframe increases.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a demodulated reference signal bearing method is characterized in that, comprising:
In time division duplex long evolving system LTE TDD, under the configuration parameter of given special subframe, on the corresponding time domain of each special subframe scheduling Physical Resource Block, select one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal;
Wherein, the configuration parameter of said given special subframe comprises: the special subframe parameter configuration is that the OFDM number of symbols ratio that descending pilot frequency sending time slots DwPTS, protection period GP and ascending pilot frequency sending time slots UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix; And/or the special subframe parameter configuration is that the OFDM number of symbols ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix.
2. method according to claim 1 is characterized in that, the said scheduling on the corresponding time domain of Physical Resource Block at each special subframe selected one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal, comprising:
When the said given special subframe configuration parameter special subframe parameter configuration that is normal cyclic prefix is an OFDM number of symbols ratio that DwPTS, GP and UpPTS take when being configured to 6: 6: 2 or 6: 7: 1, select to be positioned at the 2nd, 3 OFDM symbol or the 3rd, 5 OFDM symbol or the 2nd, 5 the said demodulated reference signal of OFDM symbols carry.
3. method according to claim 2 is characterized in that, the frequency domain interval of demodulated reference signal on same OFDM symbol that same port is corresponding is 4 number of sub-carrier.
4. according to claim 2 or 3 described methods, it is characterized in that, when the number of layers of transmission smaller or equal to 2 the time, adopt on the time domain direction code division multiplexing mode to carry out multiplexing to port 7 and port 8.
5. according to claim 2 or 3 described methods; It is characterized in that, when the number of layers of transmission greater than 2 and smaller or equal to 4 the time, carry out multiplexing in the mode that adopts the code division multiplexing on the time domain direction to combine between the different port with frequency division multiplexing; Wherein, Port 7 carries out code division multiplexing with port 8, and port 9 carries out code division multiplexing with port one 0, adopts frequency division multiplexing between first group of port being made up of port 7,8 and the second group of port being made up of port 9,10.
6. method according to claim 5 is characterized in that, the corresponding frequency domain position m of first group of port that is made up of port 7,8
1With the corresponding frequency domain position m of second group of port that forms by port 9,10
2Relation comprise: m
2=m
1+ 1 or m
2=m
1-1.
7. method according to claim 1 is characterized in that, the said scheduling on the corresponding time domain of Physical Resource Block at each special subframe selected one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal, comprising:
When the said given special subframe configuration parameter special subframe parameter configuration that is extended cyclic prefix is an OFDM number of symbols ratio that DwPTS, GP and UpPTS take when being configured to 5: 5: 2 or 5: 6: 1, selects to be positioned at the 2nd or the 4th OFDM symbol or the 2nd, 4 OFDM symbol and be used to carry said demodulated reference signal.
8. method according to claim 7 is characterized in that, when selecting to be positioned at said the 2nd, 4 the said demodulated reference signal of OFDM symbols carry, adopts the mode of code division multiplexing on the time domain direction that port 7 and port 8 are carried out code division multiplexing.
9. method according to claim 7 is characterized in that, adopts the mode of frequency domain direction code division multiplexing on two adjacent number of sub-carrier, port 7 and port 8 to be carried out code division multiplexing, and wherein, the two adjacent groups subcarrier spacing is 1 or 4 number of sub-carrier.
10. a demodulated reference signal bogey is characterized in that, comprising:
Determination module is used for the system at LTE TDD, and the configuration parameter of confirming special subframe is the configuration parameter of given special subframe; Wherein, the configuration parameter of said given special subframe comprises: the special subframe parameter configuration is that the OFDM number of symbols ratio that descending pilot frequency sending time slots DwPTS, protection period GP and ascending pilot frequency sending time slots UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix; And/or the special subframe parameter configuration is that the OFDM number of symbols ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix;
Select module, the configuration parameter of the special subframe that is used for disposing according to determination module is selected one or two orthogonal frequency division multiplex OFDM symbols carry demodulated reference signal on the corresponding time domain of each special subframe scheduling Physical Resource Block.
11. device according to claim 10; It is characterized in that said determination module is further used for confirming that the configuration parameter of said given special subframe is that the special subframe parameter configuration is that the OFDM number of symbols length ratio that DwPTS, GP and UpPTS take was configured to 6: 6: 2 or 6: 7: 1 in the normal cyclic prefix;
Said selection module is further used for: select to be positioned at the 2nd, 3 OFDM symbol or the 3rd, 5 OFDM symbol or the 2nd, 5 the said demodulated reference signal of OFDM symbols carry.
12. device according to claim 11 is characterized in that, also comprises:
First Multiplexing module is used for number of layers when transmission smaller or equal to 2 the time, adopts on the time domain direction code division multiplexing mode to carry out multiplexing to port 7 and port 8.
13. device according to claim 11 is characterized in that, also comprises:
Second Multiplexing module; Be used for number of layers when transmission greater than 2 and smaller or equal to 4 the time; The mode that code division multiplexing on employing time domain direction between the different port combines with frequency division multiplexing is carried out multiplexing, and wherein, port 7 carries out code division multiplexing with port 8; Port 9 carries out code division multiplexing with port one 0, adopts frequency division multiplexing between first group of port being made up of port 7,8 and the second group of port being made up of port 9,10.
14. device according to claim 13 is characterized in that, second Multiplexing module is further used for: definite corresponding frequency domain position m of first group of port that is made up of port 7,8
1With the corresponding frequency domain position m of second group of port that forms by port 9,10
2Relation comprise: m
2=m
1+ 1 or m
2=m
1-1.
15. device according to claim 10; It is characterized in that said determination module is further used for: confirm that said given special subframe configuration parameter is that the special subframe parameter configuration is that the OFDM number of symbols length ratio that DwPTS, GP and UpPTS take was configured to 5: 5: 2 or 5: 6: 1 in the extended cyclic prefix;
Said selection module is further used for: select to be positioned at the 2nd or the 4th OFDM symbol or the 2nd, 4 OFDM symbol and be used to carry said demodulated reference signal.
16. device according to claim 15 is characterized in that, also comprises:
The 3rd Multiplexing module; When being used to select to be positioned at the said demodulated reference signal of the 2nd, 4 OFDM symbols carry; Adopt the mode of code division multiplexing on the time domain direction that port 7 and port 8 are carried out code division multiplexing, and multiplexing result is mapped on the OFDM symbol that is positioned at the 2nd, 4.
17. device according to claim 15 is characterized in that, also comprises:
The 4th Multiplexing module is used to adopt the mode of frequency domain direction code division multiplexing on two adjacent number of sub-carrier, port 7 and port 8 to be carried out code division multiplexing, and wherein, said two adjacent groups subcarrier spacing is 1 or 4 number of sub-carrier.
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| PCT/CN2011/077438 WO2012065456A1 (en) | 2010-11-15 | 2011-07-21 | Method and device for carrying demodulation reference signal |
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| WO2012065456A1 (en) | 2012-05-24 |
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