CN101505180B - CSI reference signal bearing method and apparatus in long term evolution system - Google Patents
CSI reference signal bearing method and apparatus in long term evolution system Download PDFInfo
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- CN101505180B CN101505180B CN2009100800364A CN200910080036A CN101505180B CN 101505180 B CN101505180 B CN 101505180B CN 2009100800364 A CN2009100800364 A CN 2009100800364A CN 200910080036 A CN200910080036 A CN 200910080036A CN 101505180 B CN101505180 B CN 101505180B
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Abstract
The invention discloses a method for bearing channel state information reference signals in an advanced long-term evolution system, which comprises the following steps that: reference signals of logic ports of four of eight antennas in the advanced long-term evolution system and a bearing mode thereof are consistent with reference signals of logic ports of four antennas in a long-term evolution system and a bearing mode thereof, and a bearing mode of channel state information reference signals of logic ports of the other four antennas is that: a subframe is taken as a unit, the resource for bearing the channel state information reference signals occupies two orthogonal frequency division complexing symbols at most, and one, two, four, six or eight resource units are occupied in two resource blocks with the same frequency domain in the subframe. The invention also discloses a device for bearing the channel state information reference signals in the advanced long-term evolution system. The method and the device can realize the high-order multi-input multi-output transmission, and improve the performance of the system.
Description
Technical field
The present invention relates to a kind of bearing technology of reference signal, relate in particular to a kind of senior Long Term Evolution (LTE-A, Long-Term Evolution Advanced) channel condition information (CSI in system, ChannelStatus Information) bearing method and the device of reference signal (RS, Reference Signal).
Background technology
OFDM (OFDM, Orthogonal Frequency Division Multiplexing) technology is a kind of multi-carrier modulation technology, is one of core technology in the 4th third-generation mobile communication.On frequency domain, the multipath channel of OFDM presents the frequency selective fading characteristic, in order to overcome this decline, channel is divided on frequency domain to a plurality of subchannels, the spectral characteristic of every sub-channels is near flat all, and each sub-channels of OFDM is mutually orthogonal, therefore allow the frequency spectrum of subchannel overlapped, thus can very large limit land productivity frequency spectrum resource.The MIMO technology can increase power system capacity, improve transmission performance, and can with other physical-layer techniques, merge well, therefore becomes the key technology of B3G (Beyond 3G) and 4G mobile communication system.But, when channel relevancy is strong, the diversity gain and the spatial multiplexing gain that are brought by multipath channel reduce greatly, this will cause declining to a great extent of mimo system performance.When system adopts the regular circulation prefix, a up/down row OFDM symbol that time slot comprises 7 length, when system adopts extended cyclic prefix, a up/down row OFDM symbol that time slot comprises 6 length.A Resource Unit (RE, Resource Element) be a subcarrier in an OFDM symbol, and a downlink resource piece (RB, Resource Block) by continuous 12 subcarriers and continuous 7 (during extended cyclic prefix being 6) OFDM symbols, formed, RB is 180kHz on frequency domain, on time domain, is a time slot.Divide timing in resource, the Resource Block of take is distributed as base unit.
The LTE system is supported the MIMO application of 4 antennas, corresponding antenna port # 0, antenna port # 1, antenna port # 2, antenna port # 3 adopt the publicly-owned reference signal (CRS in community of full bandwidth, Cell-SpecificReference signals) mode, Fig. 1 a is OFDM frame CRS bearing mode schematic diagram in RB while being the regular circulation prefix, as shown in Figure 1a, number in the figure T
1, T
2, T
3, T
4Correspond respectively to the carrying position of CRS in Physical Resource Block of antenna logic port # 0, antenna logic port # 1, antenna logic port # 2, antenna logic port # 3; Fig. 1 b is OFDM frame CRS bearing mode schematic diagram in RB while being extended cyclic prefix, as shown in Figure 1 b, and number in the figure T
1, T
2, T
3, T
4Correspond respectively to the carrying position of CRS in Physical Resource Block of antenna logic port # 0, antenna logic port # 1, antenna logic port # 2, antenna logic port # 3.
LTE-A is the evolution version of LTE Release-8.Except meeting or surpassing third generation partner program (3GPP) TR 25.913: all related needs of " Requirements for Evolved UTRA (E-UTRA) and EvolvedUTRAN (E-UTRAN) ", also will meet or exceed the demand of the IMT-Advanced (IMT-Advanced) of wireless department of International Telecommunications Union (ITU-R) proposition.Wherein, with the demand of LTE Release-8 backward compatibility, refer to: the terminal of LTE Release-8 can be worked in the network of LTE-A, and the terminal of LTE-A can be worked in the network of LTE Release-8.
The clear and definite descending application that can support at most 8 antennas of LTE-A in demand research report TR 36.814 V0.1.1 of the LTE-A proposed in September, 2008; Clearly to LTE-A in the 56th meeting of in February, 2009 3GPP form the design basic framework (Way forward) of LTE-A downlink reference signal under the use of technology such as (Beamforming) for the application of supporting 8 antennas and CoMP (Coordinated Multi-Point), double-current wave beam, to be defined as the reference signal of two types to the downlink reference signal of LTE-A operation: towards the RS of High-Speed Physical Downlink Shared Channel (PDSCH, High-Speed PhysicalDownlink Shared Channel) demodulation and the RS produced towards CSI.
At present, also there is no the bearing method of the reference signal produced towards channel condition information in LTE-A when operation, can not solve in LTE-A the carrying problem of the RS produced towards CSI that supports as many as eight antenna ports.
Summary of the invention
In view of this, main purpose of the present invention is to provide bearing method and the device of channel state information reference signals in a kind of advanced long-term evolution system, can support the carrying of the RS of eight antenna ports in LTE-A, has improved the overall performance of system.
For achieving the above object, technical scheme of the present invention is achieved in that
The bearing method of channel state information reference signals in a kind of advanced long-term evolution system comprises:
Reference signal and the bearing mode thereof of the reference signal of the logic port of four antennas in advanced long-term evolution system in eight antennas and the logic port of four antennas in bearing mode and long evolving system thereof are identical, the bearing mode of the channel state information reference signals of the logic port of all the other four antennas is: take subframe as unit, the resource of Bearer Channel state information reference signals takies at most two OFDM symbols, in identical two Resource Block of subframe frequency domain, the number of shared Resource Unit is one, two, four, six or eight.
Preferably, the resource of described Bearer Channel state information reference signals takies at most two OFDM symbols, is specially:
When shared OFDM symbol is one, in subframe, last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, a fourth from the last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, the 6th of first time slot the OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, third from the bottom OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, second of second time slot OFDM symbol carries described channel state information reference signals;
When shared OFDM symbol is two, any two described channel state information reference signals of carrying in a fourth from the last OFDM symbol in last OFDM symbol and subframe in the 6th of first time slot the OFDM symbol, subframe in subframe; Perhaps, first and second OFDM symbol of second time slot in subframe, and any two the described channel state information reference signals of carrying in third from the bottom OFDM symbol in each time slot; Perhaps, in subframe, second of second time slot and the 3rd OFDM symbol carry described channel state information reference signals.
Preferably, described method also comprises:
By Resource Block all on frequency domain, according to the size of Resource Block index, every P Resource Block is divided into one group in turn, and the resource block number that last group comprises is less than or equals P, and the Resource Block index comprised in each group is different; In every group, K continuous resource piece carries described channel state information reference signals, 1≤K≤P.
Preferably, when the resource block number T that described last group comprises is less than K, described method also comprises:
The mode of last group Bearer Channel state information reference signals is identical with the mode of optional T Resource Block Bearer Channel state information reference signals in described K continuous resource piece, wherein, and 1≤T≤K.
Preferably, the Resource Unit that K continuous resource piece carries described channel state information reference signals in described every group is spaced apart 12 subcarriers, six subcarriers or three subcarriers on frequency domain.
Preferably, in frequency domain, each Resource Unit of channel state information reference signals of logic port that carries all the other four antennas is roughly suitable.
The bogey of channel state information reference signals in a kind of advanced long-term evolution system comprises:
The first load bearing unit, for the reference signal of the logic port of four antennas with long evolving system and the reference signal that the identical mode of bearing mode is carried the logic port of four antennas in eight antennas in advanced long-term evolution system thereof; And
The second load bearing unit, for carrying the channel state information reference signals of logic port of all the other four antennas in described advanced long-term evolution system eight antennas, bearing mode is: take subframe as unit, the resource of Bearer Channel state information reference signals takies at most two OFDM symbols, in identical two Resource Block of subframe frequency domain, the number of shared Resource Unit is one, two, four, six or eight.
Preferably, the resource of described the second load bearing unit Bearer Channel state information reference signals takies at most two OFDM symbols, is specially:
When shared OFDM symbol is one, in subframe, last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, a fourth from the last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, the 6th of first time slot the OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, third from the bottom OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, second of second time slot OFDM symbol carries described channel state information reference signals;
When shared OFDM symbol is two, any two described channel state information reference signals of carrying in a fourth from the last OFDM symbol in last OFDM symbol and subframe in the 6th of first time slot the OFDM symbol, subframe in subframe; Perhaps, first and second OFDM symbol of second time slot in subframe, and any two the described channel state information reference signals of carrying in third from the bottom OFDM symbol in each time slot; Perhaps, in subframe, second of second time slot and the 3rd OFDM symbol carry described channel state information reference signals.
Preferably, described the second load bearing unit carries described channel state information reference signals, is specially:
By Resource Block all on frequency domain, according to the size of Resource Block index, every P Resource Block is divided into one group in turn, and the resource block number that last group comprises is less than or equals P, and the Resource Block index comprised in each group is different; In every group, K continuous resource piece carries described channel state information reference signals, 1≤K≤P.
Preferably, when the resource block number T that described last group comprises is less than K, described the second load bearing unit carries described channel state information reference signals, is specially:
The mode of last group Bearer Channel state information reference signals is identical with the mode of optional T Resource Block Bearer Channel state information reference signals in described K continuous resource piece, wherein, and 1≤T≤K.
In the present invention, for eight antennas in LTE-A, the reference signal of the logic port of four antennas wherein and reference signal and the bearing mode thereof of four antenna logic ports in bearing mode and LTE thereof are identical, like this, make the user in the complete compatible LTE of LTE-A, channel state information reference signals (CSI-RS) for other four antenna logic ports, it is carried in the new RE in the OFDM frame, or is carried in the RE of OFDM frame and the CRS of carrying antenna logic port # 0, antenna logic port # 1, antenna logic port # 2, antenna logic port #3.In LTE-A of the present invention, the CSI-RS of other four antenna logic ports is configured in the frequency domain of OFDM subframe as far as possible equably, taking resource tries one's best in few situation and makes the user can obtain preferably transmission gain, can realize the multiple-input and multiple-output (MIMO of high-order, Multiple-InputMultiple-Output) transmit, improved the performance of system.
The accompanying drawing explanation
Fig. 1 a is OFDM frame CRS bearing mode schematic diagram in RB while being the regular circulation prefix;
Fig. 1 b is OFDM frame CRS bearing mode schematic diagram in RB while being extended cyclic prefix;
The flow chart that Fig. 2 is the bearing method of channel state information reference signals in LTE-A system of the present invention;
Fig. 3 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention one;
Fig. 3 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention one;
Fig. 4 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention two;
Fig. 4 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention two;
Fig. 5 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention three;
Fig. 5 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention three;
Fig. 6 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention four;
Fig. 6 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention four;
Fig. 7 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention five;
Fig. 7 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention five;
Fig. 8 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention six;
Fig. 8 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention six;
Fig. 9 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention seven;
Fig. 9 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention seven;
Figure 10 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention eight;
Figure 10 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention eight;
Figure 11 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention nine;
Figure 11 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention nine;
Figure 12 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention ten;
Figure 12 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention ten;
Figure 13 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 11;
Figure 13 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 11;
Figure 14 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 12;
Figure 14 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 12;
Figure 15 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 13;
Figure 15 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 13;
Figure 16 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 14;
Figure 16 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 14;
Figure 17 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 15;
Figure 17 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 15;
The composition structural representation that Figure 18 is the bogey of channel state information reference signals in LTE-A system of the present invention.
Embodiment
Basic thought of the present invention is: for eight antennas in LTE-A, the reference signal of the logic port of four antennas wherein and reference signal and the bearing mode thereof of four antenna logic ports in bearing mode and LTE thereof are identical, like this, make the user in the complete compatible LTE of LTE-A, channel state information reference signals (CSI-RS) for other four antenna logic ports, it is carried in the new RE in the OFDM frame, perhaps be carried to OFDM frame and carrying antenna logic port # 0, antenna logic port # 1, antenna logic port # 2, in the RE of the CRS of antenna logic port #3.In LTE-A of the present invention, the CSI-RS of other four antenna logic ports is configured in the frequency domain of OFDM subframe as far as possible equably, taking resource tries one's best in few situation and makes the user can obtain preferably transmission gain, can realize the multiple-input and multiple-output (MIMO of high-order, Multiple-Input Multiple-Output) transmit, improved the performance of system.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
The flow chart that Fig. 2 is the bearing method of channel state information reference signals in LTE-A system of the present invention, as shown in Figure 2, in LTE-A system of the present invention, the bearing method of channel state information reference signals comprises the following steps:
Reference signal and the bearing mode thereof of the reference signal of the logic port of four antennas in step 201:LTE-A system in eight antennas and the logic port of four antennas in bearing mode and long evolving system thereof are identical.
In the reference signal of LTE-A eight antenna logic ports and bearing mode thereof and former LTE system, four antenna logic port reference signals and bearing mode thereof are consistent, and four antenna logical port numbers in the LTE-A system are designated as antenna logic port # 0, antenna logic port # 1, antenna logic port # 2, antenna logic port # 3; All the other 4 antenna logical port numbers are designated as antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7.Bearing mode about the reference signal of antenna logic port # 0, #1, #2 and #3, can, referring to shown in Fig. 1 a, Fig. 1 b, repeat no more here.
Step 202: the bearing mode of the channel state information reference signals of the logic port of all the other four antennas is: take subframe as unit, the resource of Bearer Channel state information reference signals takies at most two OFDM symbols, in identical two Resource Block of subframe frequency domain, the number of shared Resource Unit is one, two, four, six or eight.
In a subframe, the reference signal (CSI-RS) produced towards CSI of antenna logic port #4, antenna logic port #5, antenna logic port #6, antenna logic port #7 takies L RE in the RB of same frequency domain, a corresponding CSI-RS of RE, in a subframe, the OFDM symbol quantity of carrying CSI-RS is I, wherein, L be 1,2,4,6 or 8, I be 1 or 2.I is 1 o'clock, last OFDM symbols carry CSI-RS in subframe; Perhaps, a fourth from the last OFDM symbols carry CSI-RS in subframe; Perhaps, the 6th of first time slot the OFDM symbols carry CSI-RS in subframe; Perhaps, third from the bottom OFDM symbols carry CSI-RS in subframe; Perhaps, second of second time slot OFDM symbols carry CSI-RS in subframe.I is 2 o'clock, any two carrying CSI-RS in a fourth from the last OFDM symbol in last OFDM symbol and subframe in the 6th of first time slot the OFDM symbol, subframe in subframe; Perhaps, first and second OFDM symbol of second time slot in subframe, and any two the carrying CSI-RS in third from the bottom OFDM symbol in each time slot; Perhaps, second of second time slot and the 3rd OFDM symbols carry CSI-RS in subframe.
Further, by Resource Block all on frequency domain, according to the size of Resource Block index, every P Resource Block is divided into one group in turn, and the resource block number that last group comprises is less than or equals P, and the Resource Block index comprised in each group is different; K continuous resource piece carrying CSI-RS in every group, 1≤K≤P.During K<P, in whole frequency domain, the RB of carrying CSI-RS is discontinuous, and during K=P, the RB of carrying CSI-RS is continuous.The RB be about on each time slot is divided into groups by the RB sequence number, and K the continuous RB chosen wherein carries CSI-RS, for last group, the number T of RB may be less than P, especially, may be less than K, the mode of last group Bearer Channel state information reference signals is identical with the mode of optional T Resource Block Bearer Channel state information reference signals in described K continuous resource piece, wherein, 1≤T≤K.For example, the CSI-RS bearing mode of T continuous RB before choosing in K continuous resource piece, as the CSI-RS bearing mode of this T RB.Perhaps, in each time slot last group RB dynamically along with the number of times sent or radio frame number from K continuously first RB RB start the CSI-RS bearing mode that a continuous T RB is chosen in circulation in turn, as the CSI-RS bearing mode of this T RB.The Resource Unit that in every group, K continuous resource piece carries described channel state information reference signals is spaced apart 12 subcarriers, 6 subcarriers or 3 subcarriers on frequency domain.
In each subframe, each Resource Unit of channel state information reference signals of logic port that carries all the other four antennas is roughly suitable.
For multicast Single frequency network (MBSFN, Multimedia Broadcast Single Frequency Network) subframe, retain the first two OFDM symbol for unicast transmission.
Wherein, the resource distribution mode of the reference signal produced towards channel condition information can be configured according to component carrier frequency, also can be configured according to subframe.Reference signal on each antenna logic port is determined by cell ID at the initial position of frequency domain.
Below in conjunction with accompanying drawing, further illustrate technical scheme of the present invention.In figure, the reference signal frequency domain position of each antenna logic port can change along with the change of cell ID, and the relativeness between the reference signal of each antenna logic port is constant.Number in the figure T
1, T
2, T
3, T
4, T
5, T
6, T
7, T
8Correspond respectively to the position of CSI-RS in RS of antenna logic port # 0, antenna logic port # 1, antenna logic port # 2, antenna logic port # 3, antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7.
Embodiment mono-
Work as L=1, during I=1, in two Resource Block that frequency domain in subframe is identical, only during 1 RE carrying CSI-RS, the situation of the reference signal of each antenna logic port in Physical Resource Block is as follows:
The reference signal of antenna logic port # 0 is arranged on the frequency domain the 1st and the 7th subcarrier of the 1st symbol of each time slot of subframe, and in subframe on the frequency domain the 4th and the 10th subcarrier of the 3rd symbol of inverse of each time slot;
The reference signal of antenna logic port # 1 is arranged on the frequency domain the 4th and the 10th subcarrier of the 1st symbol of each time slot of subframe, and in subframe on the frequency domain the 1st and the 7th subcarrier of the 3rd symbol of inverse of each time slot;
The reference signal of antenna logic port # 2 is arranged on the frequency domain the 1st and the 7th subcarrier of the 2nd symbol of a subframe the 1st time slot, and in subframe on the frequency domain the 4th and the 10th subcarrier of the 2nd symbol of the 2nd time slot;
The reference signal of antenna logic port # 3 is arranged on the frequency domain the 4th and the 10th subcarrier of the 2nd symbol of a subframe the 1st time slot, and in subframe on the frequency domain the 1st and the 7th subcarrier of the 2nd symbol of the 2nd time slot;
The CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 is carried in subframe on last 1 symbol; On frequency domain, every two frequency domain RB are a pair of successively corresponding to the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7, the CSI-RS of each antenna logic port is positioned on the A+1 subcarrier of each frequency domain RB at frequency domain, A=0 wherein, 1,, 11.
Wherein Fig. 3 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention one, OFDM frame during A=6 is the regular circulation prefix, as shown in Figure 3 a; Fig. 3 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention one, OFDM frame during A=6 is extended cyclic prefix, as shown in Fig. 3 b.
Embodiment bis-
Work as L=1, during I=2, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
The CSI-RS of antenna logic port # 4 and antenna logic port # 6 is carried on the 6th symbol of the 1st time slot in subframe; The CSI-RS of antenna logic port # 5 and antenna logic port #7 is carried in subframe on last 1 symbol; On frequency domain, every two frequency domain RB are a pair of successively corresponding to the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7, the CSI-RS of each antenna logic port is positioned on the A+1 subcarrier of each frequency domain RB at frequency domain, A=0 wherein, 1,, 11.
Wherein Fig. 4 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention two, OFDM frame during A=6 is the regular circulation prefix, as shown in Fig. 4 a; Fig. 4 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention two, OFDM frame during A=6 is extended cyclic prefix, as shown in Figure 4 b.
Embodiment tri-
Work as L=2, during I=1, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
The CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 is carried in subframe on last 1 symbol; On frequency domain, every two adjacent frequency domain RB are a pair of successively corresponding to CSI-RS, the antenna logic port # 6 of antenna logic port # 4 and antenna logic port # 5 and the CSI-RS of antenna logic port #7; The CSI-RS of antenna logic port # 4 is positioned at frequency domain on ((A+3) mod12)+1 subcarrier of a pair of frequency domain RB, and the CSI-RS of antenna logic port # 5 is positioned on this ((A+9) mod12)+1 subcarrier to frequency domain RB at frequency domain; The CSI-RS of antenna logic port # 6 is positioned on another ((A+3) mod12)+1 subcarrier to frequency domain RB at frequency domain, the CSI-RS of antenna logic port #7 is positioned on this ((A+9) mod12)+1 subcarrier to frequency domain RB at frequency domain, A=0 wherein, 1,, 11.Wherein, " mod " means that delivery calculates.
Wherein Fig. 5 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention three, OFDM frame during A=0 is the regular circulation prefix, as shown in Figure 5 a; Fig. 5 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention three, OFDM frame during A=0 is extended cyclic prefix, as shown in Figure 5 b.
Embodiment tetra-
Work as L=2, during I=2, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
The CSI-RS of antenna logic port # 4 and antenna logic port # 5 is carried on the 6th symbol of the 1st time slot in subframe; The CSI-RS of antenna logic port # 6 and antenna logic port #7 is carried in subframe on last 1 symbol; On frequency domain, every two frequency domain RB are a pair of successively corresponding to CSI-RS, the antenna logic port # 5 of antenna logic port # 4 and antenna logic port # 6 and the CSI-RS of antenna logic port #7, the CSI-RS of each antenna logic port is positioned on the A+1 subcarrier of each frequency domain RB at frequency domain, A=0 wherein, 1,, 11.
Wherein Fig. 6 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention four, OFDM frame during A=6 is the regular circulation prefix, as shown in Figure 6 a; Fig. 6 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention four, OFDM frame during A=6 is extended cyclic prefix, as shown in Figure 6 b.
Embodiment five
Work as L=2, during I=1, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
Every 4 adjacent frequency domain RB are for shining upon antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, the CSI-RS of antenna logic port #7, the CSI-RS of antenna logic port # 4 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port # 5 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of second frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port # 6 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of the 3rd frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port #7 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of the 4th frequency domain RB of last 1 symbol of subframe, A=0 wherein, 1, 11.
Wherein Fig. 7 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention five, OFDM frame during A=0 is the regular circulation prefix, as shown in Figure 7a; Fig. 7 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention five, OFDM frame during A=0 is extended cyclic prefix, as shown in Figure 7b.
Embodiment six
Work as L=4, during I=1, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
Every 2 frequency domain RB are for shining upon antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, the CSI-RS of antenna logic port #7, the CSI-RS of antenna logic port # 4 is arranged on the A+1 and ((A+3) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port # 5 is arranged on ((A+6) mod12)+1 and ((A+9) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port # 6 is arranged on the A+1 and ((A+3) mod12)+1 subcarrier of second frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port #7 is arranged on ((A+6) mod12)+1 and ((A+9) mod12)+1 subcarrier of second frequency domain RB of last 1 symbol of subframe, A=0 wherein, 1, 11.
Fig. 8 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention six, OFDM frame during A=0 is the regular circulation prefix, as shown in Figure 8 a; Fig. 8 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention six, OFDM frame during A=0 is extended cyclic prefix, as shown in Figure 8 b.
Embodiment seven
Work as L=4, during I=1, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
Every 2 frequency domain RB are for shining upon antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, the CSI-RS of antenna logic port #7, the CSI-RS of antenna logic port # 4 is arranged on the A+1 and ((A+6) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port # 5 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port # 6 is arranged on the A+1 and ((A+6) mod12)+1 subcarrier of second frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port #7 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of second frequency domain RB of last 1 symbol of subframe, A=0 wherein, 1, 11.
Fig. 9 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention seven, OFDM frame during A=0 is the regular circulation prefix, as shown in Fig. 9 a; Fig. 9 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention seven, OFDM frame during A=0 is extended cyclic prefix, as shown in Fig. 9 b.
Embodiment eight
Work as L=4, during I=2, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
Every 2 frequency domain RB are for shining upon antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, the CSI-RS of antenna logic port #7, the CSI-RS of antenna logic port # 4 is arranged on ((A+3) mod12)+1 and ((A+6) mod12)+1 subcarrier of first frequency domain RB of the 6th symbol of a subframe the 1st time slot, the CSI-RS of antenna logic port # 5 is arranged on ((A+3) mod12)+1 and ((A+6) mod12)+1 subcarrier of second frequency domain RB of the 6th symbol of a subframe the 1st time slot, the CSI-RS of antenna logic port # 6 is arranged on ((A+3) mod12)+1 and ((A+6) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, the CSI-RS of antenna logic port #7 is arranged on ((A+3) mod12)+1 and ((A+6) mod12)+1 subcarrier of second frequency domain RB of last 1 symbol of subframe, A=0 wherein, 1, 11.
Figure 10 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention eight, OFDM frame during A=0 is the regular circulation prefix, as shown in Figure 10 a; Figure 10 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention eight, OFDM frame during A=0 is extended cyclic prefix, as shown in Figure 10 b.
Embodiment nine
Work as L=8, during I=2, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
Each frequency domain RB is for shining upon antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, the CSI-RS of antenna logic port #7, the CSI-RS of antenna logic port # 4 is arranged on the A+1 and ((A+6) mod12)+1 subcarrier of frequency domain of the 6th symbol of a subframe the 1st time slot, the CSI-RS of antenna logic port # 5 is arranged on the A+1 and ((A+6) mod12)+1 subcarrier of frequency domain of last 1 symbol of subframe, the CSI-RS of antenna logic port # 6 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of frequency domain of the 6th symbol of a subframe the 1st time slot, the CSI-RS of antenna logic port #7 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of frequency domain of last 1 symbol of subframe, A=0 wherein, 1, 11.
Figure 11 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention nine, OFDM frame during A=0 is the regular circulation prefix, as shown in Figure 11 a; Figure 11 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention nine, OFDM frame during A=0 is extended cyclic prefix, as shown in Figure 11 b.
Embodiment ten
Work as L=6, during I=2, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
Every 2 frequency domain RB are for shining upon antenna logic port #4, antenna logic port #5, antenna logic port #6, the CSI-RS of antenna logic port #7, the CSI-RS of antenna logic port #4 is arranged in (A=0 on the A+1 and ((A+6) mod12)+1 subcarrier of ((A+3) mod12)+1 of first frequency domain RB of the 6th symbol of a subframe the 1st time slot and ((A+6) mod12)+1 subcarrier and second frequency domain RB, 1, 11) on, the CSI-RS of antenna logic port #5 is arranged on the A+1 of first frequency domain RB of last 1 symbol of subframe and ((A+6) mod12)+1 subcarrier and on ((A+3) mod12)+1 and ((A+6) mod12)+1 subcarrier of second frequency domain RB, the CSI-RS of antenna logic port #6 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of second frequency domain RB of the 6th symbol of a subframe the 1st time slot, the CSI-RS of antenna logic port #7 is arranged on ((A+3) mod12)+1 and ((A+9) mod12)+1 subcarrier of first frequency domain RB of last 1 symbol of subframe, A=0 wherein, 1, 11.
Figure 12 a is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention ten, OFDM frame during A=0 is the regular circulation prefix, as shown in Figure 12 a; Figure 12 b is the bearing mode schematic diagram of CRS in RB when in the embodiment of the present invention ten, OFDM frame during A=0 is extended cyclic prefix, as shown in Figure 12 b.
Figure 13 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 11, and as shown in Figure 13 a, the situation of reference signal in Physical Resource Block is as follows:
The reference signal of antenna logic port # 0 is arranged on the frequency domain the 1st and the 7th subcarrier of the 1st symbol of a subframe the 1st time slot;
The reference signal of antenna logic port # 1 is arranged on the frequency domain the 4th and the 10th subcarrier of the 1st symbol of a subframe the 1st time slot;
The reference signal of antenna logic port # 2 is arranged on the frequency domain the 1st and the 7th subcarrier of the 2nd symbol of a subframe the 1st time slot;
The reference signal of antenna logic port # 3 is arranged on the frequency domain the 4th and the 10th subcarrier of the 2nd symbol of a subframe the 1st time slot;
The reference signal of antenna logic port # 4 is arranged on the frequency domain the 1st and the 7th subcarrier of the 1st symbol of a subframe the 2nd time slot;
The reference signal of antenna logic port # 5 is arranged on the frequency domain the 4th and the 10th subcarrier of the 1st symbol of a subframe the 2nd time slot;
The reference signal of antenna logic port # 6 is arranged on the frequency domain the 1st and the 7th subcarrier of the 2nd symbol of a subframe the 2nd time slot;
The reference signal of antenna logic port #7 is arranged on the frequency domain the 4th and the 10th subcarrier of the 2nd symbol of a subframe the 2nd time slot.
Figure 13 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 11, and as shown in Figure 13 b, the situation of reference signal in Physical Resource Block is as follows:
CRS bearing mode and the situation in Figure 13 a of antenna logic port # 0 to #3 are identical, repeat no more here.
Bearing mode and the bearing mode shown in Figure 13 a of the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 are identical, repeat no more here.
Figure 14 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 12, and as shown in Figure 14 a, the present embodiment is for only having retained the situation of LTE 4 antenna port the first two character positions:
The reference signal of antenna logic port # 0 is arranged on the frequency domain the 1st and the 7th subcarrier of the 1st symbol of each time slot of subframe;
The reference signal of antenna logic port # 1 is arranged on the frequency domain the 4th and the 10th subcarrier of the 1st symbol of each time slot of subframe;
The reference signal of antenna logic port # 2 is arranged on the frequency domain the 1st and the 7th subcarrier of the 2nd symbol of a subframe the 1st time slot, and in subframe on the frequency domain the 4th and the 10th subcarrier of the 2nd symbol of the 2nd time slot;
The reference signal of antenna logic port # 3 is arranged on the frequency domain the 4th and the 10th subcarrier of the 2nd symbol of a subframe the 1st time slot, and in subframe on the frequency domain the 1st and the 7th subcarrier of the 2nd symbol of the 2nd time slot.
Figure 14 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 12, as shown in Figure 14 b, the situation of reference signal in Physical Resource Block is as follows: CRS bearing mode and the situation in Figure 14 a of antenna logic port # 0 to #3 are identical, repeat no more here.Bearing mode and the bearing mode shown in Figure 14 a of the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 are identical, repeat no more here.
Figure 15 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 13, and as shown in Figure 15 a, the present embodiment is situation during four antenna duplexer resources in antenna logic port # 4, #5, #6, #7 and LTE:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
The CSI-RS of the CSI-RS of antenna logic port # 4 and antenna logic port # 5 is positioned at the 1st symbol of subframe the second time slot; The CSI-RS of the CSI-RS of antenna logic port # 6 and antenna logic port #7 is positioned at the 2nd symbol of subframe the second time slot.
The CSI-RS of antenna logic port # 4 is identical with the reference signal frequency domain position of antenna logic port # 0, passes through code division multiplexing; The CSI-RS of antenna logic port # 5 is identical with the reference signal frequency domain position of antenna logic port # 1, passes through code division multiplexing; The CSI-RS of antenna logic port # 6 is identical with the reference signal frequency domain position of antenna logic port # 2, passes through code division multiplexing; The CSI-RS of antenna logic port #7 is identical with the reference signal frequency domain position of antenna logic port # 3, passes through code division multiplexing;
Figure 15 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 13, as shown in Figure 15 b, the situation of reference signal in Physical Resource Block is as follows: CRS bearing mode and the situation in Figure 15 a of antenna logic port # 0 to #3 are identical, repeat no more here.Bearing mode and the bearing mode shown in Figure 15 a of the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 are identical, repeat no more here.
Figure 16 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 14, and as shown in Figure 16 a, the present embodiment is situation during four antenna duplexer resources in antenna logic port # 4, #5, #6, #7 and LTE:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
The CSI-RS of the CSI-RS of antenna logic port # 4 and antenna logic port # 5 is positioned at the 1st symbol of subframe the 2nd time slot; The reference signal of the reference signal of antenna logic port # 6 and antenna logic port #7 is positioned at the 3rd symbol of inverse of subframe the 2nd time slot;
The CSI-RS of antenna logic port # 4 is identical with the reference signal frequency domain position of CSI-RS on subframe the 2nd time slot the 1st symbol of antenna logic port # 0, passes through code division multiplexing;
The CSI-RS of antenna logic port # 5 is identical with the reference signal frequency domain position of CSI-RS on subframe the 2nd time slot the 1st symbol of antenna logic port # 1, passes through code division multiplexing;
The CSI-RS of antenna logic port # 6 is identical with the reference signal frequency domain position of CSI-RS on subframe the 2nd time slot the 3rd symbol reciprocal of antenna logic port # 3, passes through code division multiplexing;
The CSI-RS of antenna logic port #7 is identical with the reference signal frequency domain position of CSI-RS on subframe the 2nd time slot the 3rd symbol reciprocal of antenna logic port # 2, passes through code division multiplexing.
Figure 16 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 14, as shown in Figure 16 b, the situation of reference signal in Physical Resource Block is as follows: CRS bearing mode and the situation in Figure 16 a of antenna logic port # 0 to #3 are identical, repeat no more here.Bearing mode and the bearing mode shown in Figure 16 a of the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 are identical, repeat no more here.
Figure 17 a is the CRS bearing mode schematic diagram in RB while being the regular circulation prefix of the OFDM frame in the embodiment of the present invention 15, and as shown in Figure 17 a, the present embodiment is situation during four antenna duplexer resources in antenna logic port # 4, #5, #6, #7 and LTE:
CRS bearing mode and the situation in embodiment mono-of antenna logic port # 0 to #3 are identical, repeat no more here.
The CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6 and antenna logic port #7 is carried on last 1 symbol of subframe;
The CSI-RS of antenna logic port # 4 is identical with the CSI-RS frequency domain position of antenna logic port # 5, all is positioned at the 1st and the 7th subcarrier, passes through code division multiplexing; The CSI-RS of antenna logic port # 6 is identical with the CSI-RS frequency domain position of antenna logic port #7, all is positioned at the 4th and the 10th subcarrier, passes through code division multiplexing.
Figure 17 b is the CRS bearing mode schematic diagram in RB while being extended cyclic prefix of the OFDM frame in the embodiment of the present invention 15, as shown in Figure 17 b, the situation of reference signal in Physical Resource Block is as follows: CRS bearing mode and the situation in Figure 17 a of antenna logic port # 0 to #3 are identical, repeat no more here.Bearing mode and the bearing mode shown in Figure 17 a of the CSI-RS of antenna logic port # 4, antenna logic port # 5, antenna logic port # 6, antenna logic port #7 are identical, repeat no more here.
The composition structural representation that Figure 18 is the bogey of channel state information reference signals in LTE-A system of the present invention, as shown in figure 18, in LTE-A system of the present invention, the bogey of channel state information reference signals comprises: the first load bearing unit 180 and the second load bearing unit 181, wherein, the reference signal that the first load bearing unit 180 carries the logic port of four antennas in eight antennas in advanced long-term evolution system for reference signal and the identical mode of bearing mode thereof of the logic port of four antennas with long evolving system.The second load bearing unit 181 is for the channel state information reference signals of the logic port that carries all the other four antennas in described advanced long-term evolution system eight antennas, bearing mode is: take subframe as unit, the resource of Bearer Channel state information reference signals takies at most two OFDM symbols, in identical two Resource Block of subframe frequency domain, the number of shared Resource Unit is one, two, four, six or eight.The resource of the second load bearing unit 180 Bearer Channel state information reference signals takies at most two OFDM symbols, be specially: when shared OFDM symbol is one, in subframe, last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, a fourth from the last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, the 6th of first time slot the OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, third from the bottom OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, second of second time slot OFDM symbol carries described channel state information reference signals; When shared OFDM symbol is two, any two described channel state information reference signals of carrying in a fourth from the last OFDM symbol in last OFDM symbol and subframe in the 6th of first time slot the OFDM symbol, subframe in subframe; Perhaps, first and second OFDM symbol of second time slot in subframe, and any two the described channel state information reference signals of carrying in third from the bottom OFDM symbol in each time slot; Perhaps, in subframe, second of second time slot and the 3rd OFDM symbol carry described channel state information reference signals.
Those skilled in the art are to be understood that, in the LTE-A system, the bogey of channel state information reference signals is that bearing method for channel state information reference signals in the LTE-A system shown in Fig. 2 designs, and the practical function of the each processing unit shown in Figure 18 can be with reference to the associated description of Fig. 2 and aforementioned each embodiment and understood.The function of the each processing unit shown in Figure 18 can realize by the program run on processor, also can realize by concrete logical circuit.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. the bearing method of channel state information reference signals in an advanced long-term evolution system, is characterized in that, comprising:
Reference signal and the bearing mode thereof of the reference signal of the logic port of four antennas in advanced long-term evolution system in eight antennas and the logic port of four antennas in bearing mode and long evolving system thereof are identical, the bearing mode of the channel state information reference signals of the logic port of all the other four antennas is: take subframe as unit, the resource of Bearer Channel state information reference signals takies at most two OFDM symbols, in identical two Resource Block of subframe frequency domain, the number of shared Resource Unit is one, two, four, six or eight.
2. method according to claim 1, is characterized in that, the resource of described Bearer Channel state information reference signals takies at most two OFDM symbols, is specially:
When shared OFDM symbol is one, in subframe, last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, a fourth from the last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, the 6th of first time slot the OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, third from the bottom OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, second of second time slot OFDM symbol carries described channel state information reference signals;
When shared OFDM symbol is two, any two described channel state information reference signals of carrying in a fourth from the last OFDM symbol in last OFDM symbol and subframe in the 6th of first time slot the OFDM symbol, subframe in subframe; Perhaps, first and second OFDM symbol of second time slot in subframe, and any two the described channel state information reference signals of carrying in third from the bottom OFDM symbol in each time slot; Perhaps, in subframe, second of second time slot and the 3rd OFDM symbol carry described channel state information reference signals.
3. method according to claim 2, is characterized in that, described method also comprises:
By Resource Block all on frequency domain, according to the size of Resource Block index, every P Resource Block is divided into one group in turn, and the resource block number that last group comprises is less than or equals P, and the Resource Block index comprised in each group is different; In every group, K continuous resource piece carries described channel state information reference signals, 1≤K≤P.
4. method according to claim 3, is characterized in that, when the resource block number T that described last group comprises is less than K, described method also comprises:
The mode of last group Bearer Channel state information reference signals is identical with the mode of optional T Resource Block Bearer Channel state information reference signals in described K continuous resource piece, wherein, and 1≤T≤K.
5. method according to claim 3, is characterized in that, the Resource Unit that K continuous resource piece carries described channel state information reference signals in described every group is spaced apart 12 subcarriers, six subcarriers or three subcarriers on frequency domain.
6. method according to claim 3, is characterized in that, in frequency domain, each Resource Unit of channel state information reference signals of logic port that carries all the other four antennas is suitable.
7. the bogey of channel state information reference signals in an advanced long-term evolution system, is characterized in that, comprising:
The first load bearing unit, for the reference signal of the logic port of four antennas with long evolving system and the reference signal that the identical mode of bearing mode is carried the logic port of four antennas in eight antennas in advanced long-term evolution system thereof; And
The second load bearing unit, for carrying the channel state information reference signals of logic port of all the other four antennas in described advanced long-term evolution system eight antennas, bearing mode is: take subframe as unit, the resource of Bearer Channel state information reference signals takies at most two OFDM symbols, in identical two Resource Block of subframe frequency domain, the number of shared Resource Unit is one, two, four, six or eight.
8. device according to claim 7, is characterized in that, the resource of described the second load bearing unit Bearer Channel state information reference signals takies at most two OFDM symbols, is specially:
When shared OFDM symbol is one, in subframe, last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, a fourth from the last OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, the 6th of first time slot the OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, third from the bottom OFDM symbol carries described channel state information reference signals; Perhaps, in subframe, second of second time slot OFDM symbol carries described channel state information reference signals;
When shared OFDM symbol is two, any two described channel state information reference signals of carrying in a fourth from the last OFDM symbol in last OFDM symbol and subframe in the 6th of first time slot the OFDM symbol, subframe in subframe; Perhaps, first and second OFDM symbol of second time slot in subframe, and any two the described channel state information reference signals of carrying in third from the bottom OFDM symbol in each time slot; Perhaps, in subframe, second of second time slot and the 3rd OFDM symbol carry described channel state information reference signals.
9. according to the described device of claim 7 or 8, it is characterized in that, described the second load bearing unit carries described channel state information reference signals, is specially:
By Resource Block all on frequency domain, according to the size of Resource Block index, every P Resource Block is divided into one group in turn, and the resource block number that last group comprises is less than or equals P, and the Resource Block index comprised in each group is different; In every group, K continuous resource piece carries described channel state information reference signals, 1≤K≤P.
10. device according to claim 9, is characterized in that, when the resource block number T that described last group comprises is less than K, described the second load bearing unit carries described channel state information reference signals, is specially:
The mode of last group Bearer Channel state information reference signals is identical with the mode of optional T Resource Block Bearer Channel state information reference signals in described K continuous resource piece, wherein, and 1≤T≤K.
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| CN2009100800364A CN101505180B (en) | 2009-03-17 | 2009-03-17 | CSI reference signal bearing method and apparatus in long term evolution system |
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