CN102118340A - Mapping method, transmitting method and transmitting system for channel state information reference signal - Google Patents
Mapping method, transmitting method and transmitting system for channel state information reference signal Download PDFInfo
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- CN102118340A CN102118340A CN2010100022093A CN201010002209A CN102118340A CN 102118340 A CN102118340 A CN 102118340A CN 2010100022093 A CN2010100022093 A CN 2010100022093A CN 201010002209 A CN201010002209 A CN 201010002209A CN 102118340 A CN102118340 A CN 102118340A
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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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- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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Abstract
The invention discloses a mapping method, a transmitting method and a transmitting system for a channel state information reference signal. The transmitting method includes the following steps: transmitting the channel state information reference signal of a cell on a channel state information reference signal resource, wherein the distribution of the channel state information reference signal resource of the cell meets the following conditions: and the resource elements (RE) occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbol of a physical resource block are uniformly distributed on a frequency domain. In the invention, the channel state information reference signals are uniformly mapped on the whole bandwidth of the frequency domain, and the uniform distribution of the channel state information reference signal can reduce the performance downgrading of LTE (long term evolution) users. In addition, in an LTE-A system, the uniform distribution of the REs occupied by the channel state information reference signal can also obtain more channel information, and the estimation performance of channel uniformly distributed is also superior to that of CSI-RS (Channel State Information-Reference Signal) channels continuously distributed.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to mapping method and the sending method and the transmitting system of channel state information reference signals.
Background technology
In order to improve the throughput of sub-district, carry out the interference coordination of minizone, the new generation of wireless communication system, as advanced long-term evolution system (Long-Term Evolution Advance, be called for short LTE-Advance), senior international wireless communication system (International Mobile Telecommunication Advance, be called for short IMT-Advance) etc. all introduce cooperation transmission technology (CoordinateMultipoint Transmission and Reception abbreviates COMP as) between network level.
The LTE/LTE-A system is the basis with OFDM (Orthogonal Frequency DivisionMultiplexing is called for short OFDM) technology.In ofdm system, when the communication resource is-form of bidimensional frequently.For example, in the LTE system, the communication resource all is to be that unit divides with frame (frame) on time orientation, each radio frames (radio frame) length is 10ms (millisecond), the subframe (sub-frame) that to comprise 10 length be 1ms, according to the difference of Cyclic Prefix (Cyclic Prefix abbreviates CP as) length, each subframe can comprise 12 or 14 OFDM symbols.In frequency direction, resource is that unit divides with subcarrier (sub-carrier), specifically in communication, the least unit of resource allocation is Resource Block (Resource Block, abbreviate RB as), a Physical Resource Block (Physical RB abbreviates PRB as) of corresponding physical resource, a PRB comprises 12 subcarriers at frequency domain.
At third generation partner program (3rd Generation Partnership Project, abbreviate 3GPP as) defined two kinds of pilot tones of LTE-Advanced in 56 meetings of LTE: channel state information reference signals (Channel State Information-Reference Signals, be called for short CSI-RS) and demodulated reference signal (Demodulation Reference Signals, be called for short DMRS), wherein clear and definite channel state information reference signals is cell-specific (cell-specific), distributes more sparse on running time-frequency resource with respect to demodulation pilot frequency.
Do not have the problem of specific definition at the mapping method of LTE-A system channel state information reference signals in the correlation technique and physical resource element, do not propose effective solution at present as yet.
Summary of the invention
The technical problem to be solved in the present invention provides mapping method and the sending method and the transmitting system of channel state information reference signals, for the distribution of channel state information reference signals on running time-frequency resource provides solution and alleviation system to LTE user's performance degradation, improve channel estimating performance.
In order to solve the problems of the technologies described above, the invention provides the mapping method of channel state information reference signals, comprising: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
Further, said method also has following characteristics:
Described channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
Further, said method also has following characteristics:
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical.
Further, said method also has following characteristics:
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
In order to solve the problems of the technologies described above, the present invention also provides the sending method of channel state information reference signals, send the channel state information reference signals of sub-district on the channel state information reference signals resource, the channel state information reference signals distribution of resource of this sub-district meets the following conditions: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
Further, said method also has following characteristics:
Described channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
Further, said method also has following characteristics:
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical; When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
In order to solve the problems of the technologies described above, the present invention also provides the transmitting system of channel state information reference signals, comprise the base station, described base station, be used for sending on the channel state information reference signals resource channel state information reference signals of sub-district, the channel state information reference signals distribution of resource of this sub-district meets the following conditions: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
Further, said system also has following characteristics:
Described channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
Further, said system also has following characteristics:
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical; When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
By the present invention, channel state information reference signals evenly is mapped on the whole bandwidth of frequency domain, because the user of LTE does not also know the emission of channel state information reference signals, therefore the even distribution of channel state information reference signals can reduce the performance degradation to LTE user, in addition in the LTE-A system, the even distribution of the RE that channel state information reference signals takies also can obtain more channel information, and uniform channel estimating performance also is better than the CSI-RS channel estimating performance of continuous distribution.
Description of drawings
Fig. 1 is the flow chart of the sending method of channel state information reference signals among the embodiment;
Fig. 2 is the mapping method that CSI-RS takies two RE among the embodiment on an OFDM symbol;
Fig. 3 is the mapping method that CSI-RS takies three RE among the embodiment on an OFDM symbol;
Fig. 4 is the mapping method that CSI-RS takies four RE among the embodiment on an OFDM symbol;
Fig. 5 is the mapping method that CSI-RS takies six RE among the embodiment on an OFDM symbol;
Fig. 6 is the mapping method that CSI-RS takies eight RE among the embodiment on an OFDM symbol.
Embodiment
Among the present invention, the mapping ruler of considering LTE-A system channel state information reference signals does not have the problem of specific definition, in order to reduce the influence of channel state information reference signals to LTE Release 8 (version 8), and the estimated quality of raising LTE-A channel measurement, RE shared when the definition channel state information reference signals is shone upon on an OFDM symbol evenly distributes on subcarrier.
Comprise the base station in the transmitting system of channel state information reference signals, the base station is used for sending the channel state information reference signals of sub-district on the channel state information reference signals resource, and the channel state information reference signals distribution of resource of this sub-district meets the following conditions: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
Channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
When the resource element number that takies in the OFDM symbol that channel state information reference signals takies in Physical Resource Block was 1, this resource element can be any one resource element in the OFDM symbol.
When the resource element number that takies in the OFDM symbol that channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical.Concrete:
When the resource element number that takies in the OFDM symbol that takies in Physical Resource Block is 2,5 subcarriers at interval between the adjacent resource element in the resource element that in each OFDM symbol, takies.
When the resource element number that takies in the OFDM symbol that takies in Physical Resource Block is 3,3 subcarriers at interval between the adjacent resource element in the resource element that in each OFDM symbol, takies.
When the resource element number that takies in the OFDM symbol that takies in Physical Resource Block is 4,2 subcarriers at interval between the adjacent resource element in the resource element that in each OFDM symbol, takies.
When the resource element number that takies in the OFDM symbol that takies in Physical Resource Block is 6,1 subcarrier at interval between the adjacent resource element in the resource element that in each OFDM symbol, takies.
When the resource element number that takies in the OFDM symbol that channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
As shown in Figure 1, the sending method of channel state information reference signals comprises: send the channel state information reference signals of sub-district on the channel state information reference signals resource, the channel state information reference signals distribution of resource of this sub-district meets the following conditions: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
The mapping method of channel state information reference signals comprises: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
The distribution mode of the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block in the sending method of channel state information reference signals and the mapping method is identical with the distribution mode in the above-mentioned transmitting system, repeats no more herein.
Be described in detail below in conjunction with the implementation procedure of example the embodiment of the invention.
Embodiment one
In order to reduce the influence of channel state information reference signals to LTE Release 8 (version 8), and the estimated quality of raising LTE-A channel measurement, two shared when channel state information reference signals is shone upon on OFDM symbol RE evenly distribute on subcarrier.
As shown in Figure 2, CSI-RS takies two RE on an OFDM symbol, and two adjacent RE are 5 subcarriers at interval; Wherein CSI-RS can be from each Physical Resource Block subcarrier 0 of mapping, perhaps from the mapping each Physical Resource Block subcarrier 1, perhaps from the mapping each Physical Resource Block subcarrier 2, perhaps from the mapping each Physical Resource Block subcarrier 3, from each Physical Resource Block subcarrier 4 of mapping, perhaps each Physical Resource Block subcarrier 5 from shining upon.Promptly no matter channel state information reference signals is to be mapped in first, or second, or the 3rd, or the 4th, or the 5th, or the 6th subcarrier, and two adjacent CSI-RS RE are 5 subcarriers at interval all the time.
Embodiment two
In order to reduce the influence of channel state information reference signals to LTE Release 8 (version 8), and the estimated quality of raising LTE-A channel measurement, three shared when channel state information reference signals is shone upon on OFDM symbol RE evenly distribute on subcarrier.
As shown in Figure 3, CSI-RS takies three RE on an OFDM symbol, and two adjacent RE are 3 subcarriers at interval; Wherein CSI-RS can be from each Physical Resource Block subcarrier 0 of mapping, perhaps from the mapping each Physical Resource Block subcarrier 1, perhaps from each Physical Resource Block subcarrier 2 of mapping, perhaps each Physical Resource Block subcarrier 3 from shining upon.Promptly no matter channel state information reference signals is to be mapped in first, or second, or the 3rd, or on the 4th subcarrier, and two adjacent CSI-RS RE are 3 subcarriers at interval all the time.
Embodiment three
In order to reduce the influence of channel state information reference signals to LTE Release 8 (version 8), and the estimated quality of raising LTE-A channel measurement, four shared when channel state information reference signals is shone upon on OFDM symbol RE evenly distribute on subcarrier.
As shown in Figure 4, CSI-RS takies four RE on an OFDM symbol, and two adjacent RE are 2 subcarriers at interval; Wherein CSI-RS can be from each Physical Resource Block subcarrier 0 of mapping, perhaps from each Physical Resource Block subcarrier 1 of mapping, and perhaps each Physical Resource Block subcarrier 2 from shining upon.Promptly no matter channel state information reference signals is to be mapped in first, or second, or on the 3rd subcarrier, and two adjacent CSI-RS RE are 2 subcarriers at interval all the time.
Embodiment four
In order to reduce the influence of channel state information reference signals to LTE Release 8 (version 8), and the estimated quality of raising LTE-A channel measurement, six shared when channel state information reference signals is shone upon on OFDM symbol RE evenly distribute on subcarrier.
As shown in Figure 5, CSI-RS takies six RE on an OFDM symbol, and two adjacent RE are 1 subcarrier at interval; Wherein CSI-RS can be from each Physical Resource Block subcarrier 0 of mapping, perhaps each the Physical Resource Block subcarrier 1 from shining upon.Promptly no matter channel state information reference signals is to be mapped in first, or on second subcarrier, and two adjacent CSI-RS RE are 1 subcarrier at interval all the time.
Embodiment five
In order to reduce the influence of channel state information reference signals to LTE Release 8 (version 8), and the estimated quality of raising LTE-A channel measurement, eight shared when channel state information reference signals is shone upon on OFDM symbol RE evenly distribute on subcarrier.
As shown in Figure 6, CSI-RS takies eight RE on an OFDM symbol, and these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.Have three kinds of mapping methods as shown in Figure 6.Promptly no matter the original position of map unit is first of each OFDM symbol, or second, or on the 3rd subcarrier, and two adjacent map unit are 1 subcarrier at interval all the time.
Carry out emulation experiment according to the present invention, simulated conditions is the QPSK modulation, the 1/3Turbo coding, and the translational speed of portable terminal is 30km/h, the CSI-RS transmission cycle is 2ms, and the performance degradation that equally distributed CSI-RSRE causes LTE user is less than the CSI-RS RE of continuous distribution.By emulation to above-mentioned mapping method, prove that equally distributed CSI-RS is very little to the LTE customer impact, and be better than CSI-RS and be distributed on the bandwidth, abundanter channel information can be provided, help the estimated quality that LTE-Advanced user improves channel measurement.
By the present invention, kept the CRS of LTE system to send, very little to the LTE customer impact, and high-order mimo and the required pilot frequency information of COMP are provided, help LTE-Advanced user and improve the single-link quality.In addition,, reduced performance degradation, and design overhead is low, can guarantees the performance of channel measurement, can improve the LTE-A throughput of system LTE user owing to adopted more sparse design.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the mapping method of channel state information reference signals is characterized in that,
The resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
2. the method for claim 1 is characterized in that,
Described channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
3. method as claimed in claim 1 or 2 is characterized in that,
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical.
4. method as claimed in claim 1 or 2 is characterized in that,
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
5. the sending method of channel state information reference signals is characterized in that,
Send the channel state information reference signals of sub-district on the channel state information reference signals resource, the channel state information reference signals distribution of resource of this sub-district meets the following conditions: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
6. method as claimed in claim 5 is characterized in that,
Described channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
7. as claim 5 or 6 described methods, it is characterized in that,
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical;
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
8. the transmitting system of channel state information reference signals comprises the base station, it is characterized in that,
Described base station, be used for sending on the channel state information reference signals resource channel state information reference signals of sub-district, the channel state information reference signals distribution of resource of this sub-district meets the following conditions: the resource element that channel state information reference signals takies in the OFDM symbol of Physical Resource Block evenly distributes on frequency domain.
9. system as claimed in claim 8 is characterized in that,
Described channel state information reference signals takies one or two OFDM symbol in Physical Resource Block, and preferentially takies in the 4th, 9,10,11 OFDM symbol one or two.
10. system as claimed in claim 8 or 9 is characterized in that,
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 2,3,4 or 6, in the resource element that in each OFDM symbol, takies between the adjacent resource element at interval sub-carrier number identical;
When the resource element number that takies in the OFDM symbol that described channel state information reference signals takies in Physical Resource Block is 8, these 8 resource elements are formed four map unit, and each map unit comprises between two adjacent resource elements and the adjacent map unit 1 subcarrier at interval.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100022093A CN102118340A (en) | 2010-01-06 | 2010-01-06 | Mapping method, transmitting method and transmitting system for channel state information reference signal |
| PCT/CN2010/080668 WO2011082655A1 (en) | 2010-01-06 | 2010-12-31 | Mapping method, transmission method and transmission system for channel state information-reference signals |
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| CN2010100022093A CN102118340A (en) | 2010-01-06 | 2010-01-06 | Mapping method, transmitting method and transmitting system for channel state information reference signal |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307081A (en) * | 2011-08-19 | 2012-01-04 | 电信科学技术研究院 | Method, system and equipment for sending and receiving CSI |
| WO2013010321A1 (en) * | 2011-07-19 | 2013-01-24 | Renesas Mobile Corporation | Method and apparatus for providing channel state information (csi) measurement and reporting for a segment carrier |
| WO2014019443A1 (en) * | 2012-08-02 | 2014-02-06 | 中兴通讯股份有限公司 | Method and device for performing interference measurement on interference measurement resources |
| WO2014134966A1 (en) * | 2013-03-04 | 2014-09-12 | 中兴通讯股份有限公司 | Method and apparatus for mapping and receiving resources, as well as method and apparatus for notifying and acquiring signalling |
| CN107277822A (en) * | 2016-04-07 | 2017-10-20 | 中国移动通信有限公司研究院 | A kind of method for transmitting signals and the network equipment |
| CN107809799A (en) * | 2016-09-08 | 2018-03-16 | 北京信威通信技术股份有限公司 | A kind of method and device for sending physical channel reference signal |
| WO2018112698A1 (en) * | 2016-12-19 | 2018-06-28 | 广东欧珀移动通信有限公司 | Method for transmitting signal, network device and terminal device |
| CN108365933A (en) * | 2017-01-26 | 2018-08-03 | 华为技术有限公司 | A kind of method and device sending reference signal |
| CN108809503A (en) * | 2017-05-05 | 2018-11-13 | 华为技术有限公司 | A kind of transmission method and its device of reference signal pattern |
| CN111386669A (en) * | 2017-11-27 | 2020-07-07 | 高通股份有限公司 | Conflict handling of reference signals with preempted resources |
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| WO2013010321A1 (en) * | 2011-07-19 | 2013-01-24 | Renesas Mobile Corporation | Method and apparatus for providing channel state information (csi) measurement and reporting for a segment carrier |
| CN102307081A (en) * | 2011-08-19 | 2012-01-04 | 电信科学技术研究院 | Method, system and equipment for sending and receiving CSI |
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| US10812304B2 (en) | 2016-12-19 | 2020-10-20 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for transmitting signal, network device and terminal device |
| CN108365933A (en) * | 2017-01-26 | 2018-08-03 | 华为技术有限公司 | A kind of method and device sending reference signal |
| CN108809503A (en) * | 2017-05-05 | 2018-11-13 | 华为技术有限公司 | A kind of transmission method and its device of reference signal pattern |
| CN108809503B (en) * | 2017-05-05 | 2023-10-20 | 华为技术有限公司 | Reference signal pattern transmission method and device |
| CN111386669A (en) * | 2017-11-27 | 2020-07-07 | 高通股份有限公司 | Conflict handling of reference signals with preempted resources |
| CN111386669B (en) * | 2017-11-27 | 2022-12-13 | 高通股份有限公司 | Method, apparatus, and computer-readable medium for wireless communication |
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| Publication number | Publication date |
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| WO2011082655A1 (en) | 2011-07-14 |
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Application publication date: 20110706 |