CN101800718B - Mapping treatment method based on multipoint synergic transmission - Google Patents
Mapping treatment method based on multipoint synergic transmission Download PDFInfo
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- CN101800718B CN101800718B CN200910006243.5A CN200910006243A CN101800718B CN 101800718 B CN101800718 B CN 101800718B CN 200910006243 A CN200910006243 A CN 200910006243A CN 101800718 B CN101800718 B CN 101800718B
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Abstract
The invention discloses a mapping treatment method based on multipoint synergic transmission, comprising the following step of: respectively configuring a COMP (Compensator) pilot frequency on each synergic cell in one or more sets of synergic cells on the resource element of a physical resource block according to the pilot frequency mapping mode of an antenna port 4, wherein each set of synergic cells comprises one ore more synergic cells. By means of the technical scheme of the invention, the pilot frequency structure of a COMP is set according to the pilot frequency mapping mode of the antenna port 4, and a plurality of synergic cells for servicing the same terminal are mapped according to the pilot frequency structure so that the COMP can adopt a plurality of antenna technologies of diversion, multiplexing and the like, thereby increasing the gains of systems.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of mapping treatment method based on coordinated multipoint transmission.
Background technology
In the wireless communication system of a new generation, by coordinated multipoint transmission (the Coordinate Multipoint Transmission and Reception of network level, referred to as COMP), improve the throughput of Cell Edge User, and carry out the interference coordination of minizone, such as, advanced long-term evolution system (Long-Term Evolution advance, referred to as LTE-Advance), senior international wireless communication system (International MobileTelecommunication advance, referred to as IMT-Advance) etc.
COMP technology is divided into descending coordinated multipoint transmission and ascending multi-point collaboration transmission, wherein, descending coordinated multipoint transmission operation principle is: cooperated on identical Radio Resource by multiple cooperation cell, is a travelling carriage (User Equipment, referred to as UE) service jointly; Or each cooperation cell is that one or more UE serves on identical Radio Resource simultaneously.Can find out, COMP technology utilizes the cooperation transmission of multiple community to realize the raising of cooperation cell edge wireless link, the interference that the user reducing cell edge place causes, thus improves power system capacity.
At present, for the pilot configuration that COMP technology adopts in existing technical scheme, and the relation between the pilot tone of each cooperation cell, do not provide concrete solution.
Summary of the invention
Consider that a kind of technology of the needs existed in correlation technique solves the pilot configuration of COMP technology employing, and the problem of relation between the pilot tone of each cooperation cell group and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of mapping treatment method, to solve the problem.
According to an aspect of the present invention, a kind of mapping treatment method based on coordinated multipoint transmission is provided.
Mapping treatment method based on coordinated multipoint transmission according to the present invention comprises: according to the pilot tone mapping mode of antenna port 4, for each cooperation cell in one or more groups cooperation cell configures COMP pilot tone respectively on the resource element of Physical Resource Block, wherein, often organize cooperation cell and all can comprise one or more cooperation cell.
Further, the method also comprises the process of COMP pilot settings: for any two cooperation cell belonging to same cooperation cell group, is to distribute its COMP pilot settings with the COMP pilot interlace of the arbitrary cooperation cell belonging to another cooperation cell group on frequency domain.
Wherein, for the resource element carrying COMP pilot tone in described Physical Resource Block, by its etc. give each cooperation cell group.
Preferably, for the same OFDM symbol of time domain, the COMP pilot tone of described multiple cooperation cell group is with predefined procedure loop configuration.
Wherein, the process of described COMP pilot settings comprises: for the same OFDM symbol of time domain, between two the nearest resource elements of COMP pilot tone being configured with same cooperation cell group, also there is the resource element being configured with the COMP pilot tone of other cooperation cell group.
Wherein, the process of described COMP pilot settings comprises: for M cooperation cell group, the pilot tone of antenna port 4 has N number of, at same time domain, m group cooperation cell is mapped in (m+M*I) individual pilot tone of antenna port 4, wherein m=1,2 ..., M, I=0,1 ..., (N/M-1), M=1 or 2 or 3, N=18.
Wherein, identical terminal is all served in all cooperation cell in the group of described multiple cooperation cell.
Preferably, first OFDM symbol of described Physical Resource Block and subcarrier corresponding to second OFDM symbol are for carrying the control channel of each cooperation cell in the group of described multiple cooperation cell.
Wherein, in normal cyclic prefix frame structure, the 3rd of described Physical Resource Block the OFDM symbol is configured to not carry public guide frequency to the 14 OFDM symbol.
Preferably, in long loop prefix frame structure, the 3rd of described Physical Resource Block the OFDM symbol is configured to not carry public guide frequency to the 12 OFDM symbol.
Preferably, first OFDM symbol of described Physical Resource Block and subcarrier corresponding to second OFDM symbol are for carrying the public guide frequency of main cooperation cell, wherein, described main cooperation cell is the cooperation cell for sending control signaling in the group of described multiple cooperation cell.
According to an aspect of the present invention, a kind of mapping treatment method based on coordinated multipoint transmission is provided.
Mapping treatment method based on coordinated multipoint transmission according to the present invention comprises: according to the pilot tone mapping mode of antenna port 4, for N number of cooperation cell of same terminal service configures COMP pilot tone respectively on the resource element of Physical Resource Block, wherein, each cooperation cell all maps COMP pilot tone according to the mapping position of antenna port 4.
Wherein, in described Physical Resource Block, the sub-carrier configuration not carrying COMP pilot tone is used for carrying data.
Further, the method also comprises: for each cooperation cell, sends the subcarrier of the described COMP pilot signal of carrying and the subcarrier of the described data of carrying, correspondingly, receiving terminal merges at the Received signal strength by from each cooperation cell of eating dishes without rice or wine, and obtains merging Received signal strength.
By at least one technical scheme above-mentioned of the present invention, the present invention arranges the pilot configuration of COMP according to the pilot tone mapping mode of antenna port 4, according to this pilot configuration, mapping process is carried out to the multiple cooperation cell served for same terminal, solve in prior art and there is no COMP pilot configuration, and the problem of relation between the pilot tone of multiple cooperation cell group, make COMP can adopt diversity, the multi-antenna technology such as multiplexing, add system gain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 a is the pilot tone pattern schematic diagram of the antenna port 4 based on normal cyclic prefix frame structure according to correlation technique;
Fig. 1 b is the pilot tone pattern schematic diagram of the antenna port 4 based on long loop prefix frame structure according to correlation technique;
Fig. 2 is the flow chart of the mapping treatment method based on coordinated multipoint transmission and COMP according to the inventive method embodiment;
Fig. 3 a is the COMP pilot tone pattern schematic diagram of two the cooperation cell groups based on normal cyclic prefix frame structure according to the inventive method embodiment;
Fig. 3 b is the COMP pilot tone pattern schematic diagram of two the cooperation cell groups based on long loop prefix frame structure according to the inventive method embodiment;
Fig. 4 a is the COMP pilot tone pattern schematic diagram of three the cooperation cell groups based on normal cyclic prefix frame structure according to the inventive method embodiment;
Fig. 4 b is the COMP pilot tone pattern schematic diagram of three cooperation cell groups of long loop prefix frame structure according to the inventive method embodiment;
Fig. 5 a is another pilot tone pattern schematic diagram of COMP according to three cooperation cell groups based on normal cyclic prefix frame structure of the inventive method embodiment;
Fig. 5 b is another pilot tone pattern schematic diagram of COMP according to three cooperation cell groups based on long loop prefix frame structure of the inventive method embodiment.
Embodiment
Functional overview
As mentioned above, pilot configuration for the coordinated multipoint transmission for network level existed in prior art (COMP) does not provide concrete scheme, and in this technology each cooperation cell group pilot tone between the problem of relation, a kind of mapping processing scheme based on COMP technology is proposed.
In LTE (Long-Term Evolution Long Term Evolution) system, define the pilot tone pattern of the antenna port 4 of normal cyclic prefix frame structure, and in the TS36.211 v8.4.0 of third generation partner program (The Third Generation Partner Project, referred to as 3GPP), define the pilot tone pattern of the antenna port 4 of long loop prefix frame structure.Based on this, basic ideas of the present invention are: COMP pilot tone pattern is based on the pilot tone pattern of antenna port 4, according to the pilot tone mapping mode of antenna port 4, for each cooperation cell in the group of multiple cooperation cell configures COMP pilot tone respectively on the resource element of Physical Resource Block; For any two cooperation cell belonging to same cooperation cell group, be discontinuous on frequency domain by its COMP pilot settings, wherein, identical terminal is all served in all cooperation cell in the group of described multiple cooperation cell.That is, in COMP technology, based on the COMP pilot tone of the multicast communication of antenna port 4 and the mapping scheme of Physical Resource Block.
When not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
For the ease of understanding the embodiment of the present invention, before the explanation embodiment of the present invention, the pilot tone pattern of 1a and accompanying drawing 1b to the pilot tone pattern of the normal cyclic prefix frame structure of antenna port in prior art 4 and the long loop prefix frame structure of antenna port 4 is described first by reference to the accompanying drawings.As shown in Figure 1a, in a physical resource unit of the frame structure based on normal cyclic prefix, frequency domain comprises 14 OFDMs (Orthogonal FrequencyDivision Multiplexing, referred to as OFDM) symbol, time domain comprises 12 subcarriers, wherein, the 3rd, the 7th and the 11st symbol carry pilot tone.As shown in Figure 1 b, in a physical resource unit of the frame structure based on long loop prefix, frequency domain comprises 12 OFDM symbol, time domain comprises 12 subcarriers, wherein, the 3rd, the 7th and the 11st symbol carry pilot tone.
The present invention is described in detail below in conjunction with accompanying drawing.
Embodiment of the method
According to the embodiment of the present invention, provide a kind of mapping treatment method.
Fig. 2 describes the flow process according to the mapping treatment method based on coordinated multipoint transmission and COMP of the present invention, as shown in Figure 2, comprises following process (step S202 is to step S204).
Step S202, according to the pilot tone mapping mode of antenna port 4, for each cooperation cell in many group cooperation cell configures COMP pilot tone respectively on the resource element of Physical Resource Block, namely, the pilot density of COMP pilot tone and position, the pilot density specified with antenna port 4 is identical with position; And the resource element not carrying COMP pilot tone is configured for carrying data, preferably, first of a Physical Resource Block OFDM symbol and subcarrier corresponding to second OFDM symbol can be used for the control channel carrying each cooperation cell in the group of described multiple cooperation cell.
Step S204, often organize cooperation cell and all can comprise one or more cooperation cell, in specific implementation process, the process of COMP pilot settings can be carried out: for any two cooperation cell belonging to same cooperation cell group, be distribute its COMP pilot settings with the COMP pilot interlace of the arbitrary cooperation cell belonging to another cooperation cell group on frequency domain, namely, for any two cooperation cell belonging to same cooperation cell group, be discontinuous on frequency domain by its COMP pilot settings, particularly, for the same OFDM symbol of time domain, between two the nearest resource elements of COMP pilot tone being configured with same cooperation cell group, also there is the resource element being configured with the COMP pilot tone of other cooperation cell group, wherein, identical terminal (this terminal can be called reference terminal) is all served in all cooperation cell in the group of multiple cooperation cell.Such as, for M cooperation cell group, the pilot tone of antenna port 4 has N number of, at same time domain, m group cooperation cell is mapped in (m+M*I) individual pilot tone of antenna port 4, wherein m=1,2 ..., M, I=0,1 ..., (N/M-1), M=1 or 2 or 3, N=18.
The present invention arranges the pilot configuration of COMP according to the pilot tone mapping mode of antenna port 4, according to this pilot configuration, mapping process is carried out to the multiple cooperation cell served for same terminal, make COMP can adopt diversity, the multi-antenna technology such as multiplexing, add system gain.
In specific implementation process, can first will multiple cooperation cell of service be provided to be divided into multiple cooperation cell group for same terminal, wherein, the plurality of cooperation cell can be a Terminal for service, also can be multiple Terminal for service.In the mapping process of COMP pilot tone, for the resource element carrying COMP pilot tone in Physical Resource Block, by its etc. give each cooperation cell group, such as, as illustrated in figs. ia and ib, in the mapping pattern of antenna port 4, in a Physical Resource Block, have 18 resource elements to may be used for arranging pilot tone, like this, if there are 2 cooperation cell groups to be identical Terminal for service, be called cooperation cell group 1 and cooperation cell group 2, then the resource element of 9 wherein can be used for for the cooperation cell in cooperation cell group 1 arranges COMP pilot tone, other 9 resource elements are used for for the cooperation cell in cooperation cell group 2 arranges COMP pilot tone.If there are 3 cooperation cell groups to be identical Terminal for service, be called cooperation cell group 1, cooperation cell group 2 and cooperation cell group 3, then the resource element of 6 wherein can be used for for the cooperation cell in cooperation cell group 1 arranges COMP pilot tone, 6 resource elements in residue 12 resource elements are used for for the cooperation cell in cooperation cell group 2 arranges COMP pilot tone, and remaining 6 resource elements are used for for the cooperation cell in cooperation cell group 3 arranges COMP pilot tone.
In addition, in normal cyclic prefix frame structure, the 3rd of a Physical Resource Block OFDM symbol can be configured to not carry public guide frequency to the 14 OFDM symbol; In long loop prefix frame structure, the 3rd of a Physical Resource Block OFDM symbol can be configured to not carry public guide frequency to the 12 OFDM symbol.And, in normal cyclic prefix frame structure and long loop prefix frame structure, can by the public guide frequency of the main cooperation cell of configuration carrying in first of a Physical Resource Block OFDM symbol and second OFDM symbol, wherein, this main cooperation cell is used for sending control command to transmitting terminal.
Further, notice signaling can be carried in first of a Physical Resource Block OFDM symbol and second OFDM symbol, the terminal of notice except reference terminal, this Physical Resource Block is COMP private resource, do not consider this COMP private resource when carrying out channel measurement, and abandon the relevant public guide frequency of this COMP private resource; Further, after the use of this COMP private resource terminates, this COMP private resource is discharged, for the physical resource that the free time goes out, system can to this physical resource Random assignment, or system is distributed this physical resource with the criterion not relying on channel quality measurement.
After transmitting terminal completes mapping process according to said process, multiple COMP pilot tone and data to be sent are sent to receiving terminal, and receiving terminal carries out channel estimating according to the multiple COMP pilot tones received, and detects above-mentioned data according to channel estimation results.
Like this, COMP pilot tone pattern according to the present invention is based on the pilot tone pattern of antenna port 4, for same UE provides multiple cooperation cell of service to adopt unified frame structure, and cooperate on identical physical resource, further, the pilot tone pattern map pilot symbol of the plurality of cooperation cell all according to antenna port 4 on the data channel of institute's Resources allocation, mapping (enum) data on the resource element of non-map pilot, correspondingly, receiving terminal just extracts pilot frequency information according to the mapping mode of antenna port 4.
In specific implementation process, for the same OFDM symbol of time domain, the COMP pilot tone of multiple cooperation cell group with predefined procedure loop configuration, can be described in detail below in conjunction with the pilot tone pattern of instantiation to COMP of the present invention.It should be noted that, if no special instructions, cooperation cell group hereinafter described all represents above-mentioned cooperation cell group, and cooperation cell hereinafter described all represents above-mentioned cooperation cell.
The COMP pilot tone pattern of two cooperation cell groups
Fig. 3 a describes the COMP pilot tone pattern of two the cooperation cell groups based on normal cyclic prefix frame structure according to the embodiment of the present invention, in order to clear description, these two cooperation cell groups are called cooperation cell group 1 and cooperation cell group 2, wherein, cooperation cell group 1 can comprise one or more cooperation cell, and cooperation cell group 2 can comprise one or more cooperation cell.
As shown in Figure 3 a, according to the pilot tone mapping mode of antenna port 4, by the COMP pilot tone R of cooperation cell group 1
4 1with the COMP pilot tone R of cooperation cell group 2
4 2be arranged on the pilot tone pattern relevant position of antenna port 4, the COMP number of pilots of cooperation cell group 1 equals the COMP number of pilots of cooperation cell group 2, be the half of all number of pilots of antenna port 4, further, cooperation cell group 1 and the cooperation cell group 2 pilot tone pattern map pilot symbol all according to antenna port 4 on the data channel of institute's Resources allocation.The COMP pilot interlace of two cooperation cell groups is arranged, for the same OFDM symbol of time domain, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 1, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 2, that is, at the R that two of same OFDM symbol of time domain are nearest
4 1between there is R
4 2, at the R that two of same OFDM symbol of time domain are nearest
4 2between there is R
4 1.
Such as, in the 3rd OFDM symbol of Physical Resource Block, COMP pilot tone is with R
4 1formerly, R
4 2posterior sequential loop configuration; In the 7th OFDM symbol of Physical Resource Block, COMP pilot tone is with R
4 2formerly, R
4 1posterior sequential loop configuration; In the 11 OFDM symbol of Physical Resource Block, COMP pilot tone is with R
4 1formerly, R
4 2posterior sequential loop configuration.It should be noted that, R
4 1can be the COMP pilot tone of any one cooperation cell in cooperation cell group 1, R
4 2it can be the COMP pilot tone of any one cooperation cell in cooperation cell group 2.
Fig. 3 b describes the COMP pilot tone pattern of two the cooperation cell groups based on long loop prefix frame structure according to the embodiment of the present invention, identical with Fig. 3 a, these two cooperation cell groups are called cooperation cell group 1 and cooperation cell group 2, wherein, cooperation cell group 1 comprises one or more cooperation cell, and cooperation cell group 2 comprises one or more cooperation cell.
As shown in Figure 3 b, according to the pilot tone mapping mode of antenna port 4, by the COMP pilot tone R of cooperation cell group 1
4 1with the COMP pilot tone R of cooperation cell group 2
4 2be arranged on the pilot tone pattern relevant position of antenna port 4, the COMP number of pilots of cooperation cell group 1 equals the COMP number of pilots of cooperation cell group 2, be the half of all number of pilots of antenna port 4, further, cooperation cell group 1 and the cooperation cell group 2 pilot tone pattern map pilot symbol all according to antenna port 4 on the data channel of institute's Resources allocation.The COMP pilot interlace of two cooperation cell groups is arranged, for the same OFDM symbol of time domain, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 1, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 2, that is, at the R that two of same OFDM symbol of time domain are nearest
4 1between there is R
4 2, at the R that two of same OFDM symbol of time domain are nearest
4 2between there is R
4 1.
Such as, in the 3rd OFDM symbol of Physical Resource Block, COMP pilot tone is with R
4 1formerly, R
4 2posterior sequential loop configuration; In the 7th OFDM symbol of Physical Resource Block, COMP pilot tone is with R
4 2formerly, R
4 1posterior sequential loop configuration; In the 11 OFDM symbol of Physical Resource Block, COMP pilot tone is with R
4 1formerly, R
4 2posterior sequential loop configuration.It should be noted that, R
4 1can be the COMP pilot tone of any one cooperation cell in cooperation cell group 1, R
4 2it can be the COMP pilot tone of any one cooperation cell in cooperation cell group 2.
According to the above description, at the mapping mode of two cooperation cell groups, can when not increasing pilot-frequency expense, make COMP can adopt diversity, the multi-antenna technology such as multiplexing, bring the processing gain of multiple antennas.
The COMP pilot tone pattern of three cooperation cell groups
Below in conjunction with example 1 and example 2, the COMP pilot tone pattern to three cooperation cell groups is described in detail.
Example 1
Fig. 4 a describes the pilot tone pattern of the COMP of three the cooperation cell groups based on normal cyclic prefix frame structure according to the embodiment of the present invention, in order to clear description, these three cooperation cell groups are called cooperation cell group 1, cooperation cell group 2 and cooperation cell group 3, wherein, cooperation cell group 1 can comprise one or more cooperation cell, cooperation cell group 2 can comprise one or more cooperation cell, and cooperation cell group 2 can comprise one or more cooperation cell.
As shown in fig. 4 a, according to the pilot tone mapping mode of antenna port 4, by the COMP pilot tone R of cooperation cell group 1
4 1, cooperation cell group 2 COMP pilot tone R
4 2with the COMP pilot tone R of cooperation cell group 3
4 3be arranged on the pilot tone pattern relevant position of antenna port 4, the COMP pilot interlace of three cooperation cell groups is arranged, wherein, the COMP number of pilots of cooperation cell group 1, the COMP number of pilots of cooperation cell group 2, the COMP number of pilots of cooperation cell group 3 are 1/3rd of all number of pilots of antenna port 4.For the same OFDM symbol of time domain, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 1, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 2, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 3, that is, at the R that two of same OFDM symbol of time domain are nearest
4 1between there is R
4 2or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 2between there is R
4 1or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 3between there is R
4 1or R
4 2.
Such as, in the 3rd OFDM symbol of Physical Resource Block, COMP pilot tone is successively with R
4 1, R
4 2, R
4 3sequential loop configuration; In the 7th OFDM symbol of Physical Resource Block, COMP pilot tone is successively with R
4 3, R
4 1, R
4 2sequential loop configuration; In the 11 OFDM symbol of Physical Resource Block, COMP pilot tone is successively with R
4 1, R
4 2, R
4 3sequential loop configuration.It should be noted that, R
4 1can be the COMP pilot tone of any one cooperation cell in cooperation cell group 1, R
4 2can be the COMP pilot tone of any one cooperation cell in cooperation cell group 2, R
4 3it can be the COMP pilot tone of any one cooperation cell in cooperation cell group 3.
Fig. 4 b describes the pilot tone pattern of the COMP of three the cooperation cell groups based on long loop prefix frame structure according to the embodiment of the present invention, identical with Fig. 4 a, these three cooperation cell groups are called cooperation cell group 1, cooperation cell group 2 and cooperation cell group 3, wherein, cooperation cell group 1 can comprise one or more cooperation cell, cooperation cell group 2 can comprise one or more cooperation cell, and cooperation cell group 2 can comprise one or more cooperation cell.
As shown in Figure 4 b, according to the pilot tone mapping mode of antenna port 4, by the COMP pilot tone R of cooperation cell group 1
4 1, cooperation cell group 2 COMP pilot tone R
4 2with the COMP pilot tone R of cooperation cell group 3
4 3be arranged on the pilot tone pattern relevant position of antenna port 4, the COMP pilot interlace of three cooperation cell groups is arranged, wherein, the COMP number of pilots of cooperation cell group 1, the COMP number of pilots of cooperation cell group 2, the COMP number of pilots of cooperation cell group 3 are 1/3rd of all number of pilots of antenna port 4.For the same OFDM symbol of time domain, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 1, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 2, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 3, that is, at the R that two of same OFDM symbol of time domain are nearest
4 1between there is R
4 2or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 2between there is R
4 1or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 3between there is R
4 1or R
4 2.
Such as, in the 3rd OFDM symbol of Physical Resource Block, COMP pilot tone is successively with R
4 1, R
4 2, R
4 3sequential loop configuration; In the 7th OFDM symbol of Physical Resource Block, COMP pilot tone is successively with R
4 3, R
4 1, R
4 2sequential loop configuration; In the 11 OFDM symbol of Physical Resource Block, COMP pilot tone is successively with R
4 1, R
4 2, R
4 3sequential loop configuration.It should be noted that, R
4 1can be the COMP pilot tone of any one cooperation cell in cooperation cell group 1, R
4 2can be the COMP pilot tone of any one cooperation cell in cooperation cell group 2, R
4 3it can be the COMP pilot tone of any one cooperation cell in cooperation cell group 3.
Example 2
Fig. 5 a describes the pilot tone pattern of the COMP of three the cooperation cell groups based on normal cyclic prefix frame structure according to the embodiment of the present invention, in order to clear description, these three cooperation cell groups are called cooperation cell group 1, cooperation cell group 2 and cooperation cell group 3, wherein, cooperation cell group 1 can comprise one or more cooperation cell, cooperation cell group 2 can comprise one or more cooperation cell, and cooperation cell group 2 can comprise one or more cooperation cell.
As shown in Figure 5 a, according to the pilot tone mapping mode of antenna port 4, by the COMP pilot tone R of cooperation cell group 1
4 1, cooperation cell group 2 COMP pilot tone R
4 2with the COMP pilot tone R of cooperation cell group 3
4 3be arranged on the pilot tone pattern relevant position of antenna port 4, the COMP pilot interlace of three cooperation cell groups is arranged, wherein, the COMP number of pilots of cooperation cell group 1, the COMP number of pilots of cooperation cell group 2, the COMP number of pilots of cooperation cell group 3 are 1/3rd of all number of pilots of antenna port 4.For the same OFDM symbol of time domain, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 1, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 2, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 3, that is, at the R that two of same OFDM symbol of time domain are nearest
4 1between there is R
4 2or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 2between there is R
4 1or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 3between there is R
4 1or R
4 2.
Such as, in the 3rd OFDM symbol of Physical Resource Block, the 7th OFDM symbol and the 11 OFDM symbol, COMP pilot tone is successively with R
4 1, R
4 2, R
4 3sequential loop configuration.It should be noted that, R
4 1can be the COMP pilot tone of any one cooperation cell in cooperation cell group 1, R
4 2can be the COMP pilot tone of any one cooperation cell in cooperation cell group 2, R
4 3it can be the COMP pilot tone of any one cooperation cell in cooperation cell group 3.
Fig. 5 b describes the pilot tone pattern of the COMP of three the cooperation cell groups based on long loop prefix frame structure according to the embodiment of the present invention, identical with Fig. 5 a, these three cooperation cell groups are called cooperation cell group 1, cooperation cell group 2 and cooperation cell group 3, wherein, cooperation cell group 1 can comprise one or more cooperation cell, cooperation cell group 2 can comprise one or more cooperation cell, and cooperation cell group 2 can comprise one or more cooperation cell.
As shown in Figure 5 b, according to the pilot tone mapping mode of antenna port 4, by the COMP pilot tone R of cooperation cell group 1
4 1, cooperation cell group 2 COMP pilot tone R
4 2with the COMP pilot tone R of cooperation cell group 3
4 3be arranged on the pilot tone pattern relevant position of antenna port 4, the COMP pilot interlace of three cooperation cell groups is arranged, wherein, the COMP number of pilots of cooperation cell group 1, the COMP number of pilots of cooperation cell group 2, the COMP number of pilots of cooperation cell group 3 are 1/3rd of all number of pilots of antenna port 4.For the same OFDM symbol of time domain, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 1, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 2, non-conterminous mutually between each CDMP pilot tone of cooperation cell group 3, that is, at the R that two of same OFDM symbol of time domain are nearest
4 1between there is R
4 2or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 2between there is R
4 1or R
4 3, at the R that two of same OFDM symbol of time domain are nearest
4 3between there is R
4 1or R
4 2.
Such as, in the 3rd OFDM symbol of Physical Resource Block, the 7th OFDM symbol and the 11 OFDM symbol, COMP pilot tone is successively with R
4 1, R
4 2, R
4 3sequential loop configuration.It should be noted that, R
4 1can be the COMP pilot tone of any one cooperation cell in cooperation cell group 1, R
4 2can be the COMP pilot tone of any one cooperation cell in cooperation cell group 2, R
4 3it can be the COMP pilot tone of any one cooperation cell in cooperation cell group 3.
According to the above description, at the mapping mode of three cooperation cell groups, can when not increasing pilot-frequency expense, make COMP can adopt diversity, the multi-antenna technology such as multiplexing, bring the processing gain of multiple antennas.
Embodiment of the method two
According to the embodiment of the present invention, provide a kind of mapping treatment method based on COMP
The mapping treatment method based on COMP according to the embodiment of the present invention comprises: according to the pilot tone mapping mode of antenna port 4, for N number of cooperation cell of same terminal service configures COMP pilot tone respectively on the resource element of Physical Resource Block, wherein, each cooperation cell all maps COMP pilot tone according to the mapping position of antenna port 4, namely, for each community, the pilot density of its COMP pilot tone and position, the pilot density specified with antenna port 4 is identical with position; And the sub-carrier configuration not carrying COMP pilot tone is used for carrying data, preferably, first of a Physical Resource Block OFDM symbol and subcarrier corresponding to second OFDM symbol can be used for the control channel carrying each cooperation cell in the group of described multiple cooperation cell, wherein, this N number of cooperation cell can be a Terminal for service, also can be multiple Terminal for service.
In addition, in normal cyclic prefix frame structure, the 3rd of a Physical Resource Block OFDM symbol can be configured to not carry public guide frequency to the 14 OFDM symbol; In long loop prefix frame structure, the 3rd of a Physical Resource Block OFDM symbol can be configured to not carry public guide frequency to the 12 OFDM symbol.And, in normal cyclic prefix frame structure and long loop prefix frame structure, can by the public guide frequency of the main cooperation cell of configuration carrying in first of a Physical Resource Block OFDM symbol and second OFDM symbol, wherein, this main cooperation cell is used for sending control command to transmitting terminal.
Further, first OFDM symbol can determined at physical resource and second OFDM symbol carry notice signaling, the terminal of notice except reference terminal, this Physical Resource Block is COMP private resource, do not consider this COMP private resource when carrying out channel measurement, and abandon the relevant public guide frequency of this COMP private resource; Further, after the use of this COMP private resource terminates, this COMP private resource is discharged, for the physical resource that the free time goes out, system can to this physical resource Random assignment, or system is distributed this physical resource with the criterion not relying on channel quality measurement.
After completing mapping process according to said process, for each cooperation cell, the subcarrier of carrying COMP pilot signal and the subcarrier of carrying data is sent to receiving terminal, like this, receiving terminal directly merges at the Received signal strength by from each cooperation cell of eating dishes without rice or wine, obtain merging Received signal strength, use the method, merging gain can reach 3dB.
By the technical scheme that the embodiment of the present invention provides, in COMP technology, multiple cooperation cell all adopts identical frame structure, improve reliable, for cooperation transmission defines special frequency resource, the design of COMP can be made more flexible, realize more obvious gain.
As mentioned above, the present invention arranges the pilot configuration of COMP according to the pilot tone mapping mode of antenna port 4, according to this pilot configuration, mapping process is carried out to the multiple cooperation cell served for same terminal, when not increasing pilot-frequency expense, COMP is made to adopt diversity, multiplexing multi-antenna technology such as grade, add system gain, in addition, use the method, multiple cooperation cell group in COMP technology all adopts identical frame structure, can reliably working, for cooperation transmission defines special frequency resource, the design of COMP can be made more flexible, realize more obvious gain.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1., based on a mapping treatment method of coordinated multipoint transmission and COMP, it is characterized in that, comprising:
According to the pilot tone mapping mode of antenna port 4, for each cooperation cell in one or more groups cooperation cell configures COMP pilot tone respectively on the resource element of Physical Resource Block, wherein, often organize cooperation cell and all can comprise one or more cooperation cell;
To the process of described COMP pilot settings: for any two cooperation cell belonging to same cooperation cell group, be distribute its COMP pilot settings with the COMP pilot interlace of the arbitrary cooperation cell belonging to another cooperation cell group on frequency domain, wherein, the process of described COMP pilot settings also comprises:
For same OFDM and OFDM symbol, between two the nearest resource elements of COMP pilot tone being configured with same cooperation cell group, also there is the resource element being configured with the COMP pilot tone of other cooperation cell group.
2. method according to claim 1, is characterized in that, the process of described COMP pilot settings comprises:
For M cooperation cell group, the pilot tone of antenna port 4 has N number of, at same time domain, m group cooperation cell is mapped in (m+M*I) individual pilot tone of antenna port 4, wherein m=1,2 ..., M, I=0,1 ..., (N/M – 1), M=1 or 2 or 3, N=18.
3. method according to claim 1, is characterized in that, for the resource element carrying COMP pilot tone in described Physical Resource Block, by its etc. give each cooperation cell group.
4. method according to claim 1, is characterized in that, for same OFDM symbol, the COMP pilot tone of described multiple cooperation cell group is with predefined procedure loop configuration.
5. method according to any one of claim 1 to 4, is characterized in that, identical terminal is all served in all cooperation cell in the group of described multiple cooperation cell.
6. method according to any one of claim 1 to 4, is characterized in that, first OFDM symbol of described Physical Resource Block and subcarrier corresponding to second OFDM symbol are for carrying the control channel of each cooperation cell in the group of described multiple cooperation cell.
7. method according to any one of claim 1 to 4, is characterized in that, in normal cyclic prefix frame structure, the 3rd of described Physical Resource Block the OFDM symbol is configured to not carry public guide frequency to the 14 OFDM symbol.
8. method according to any one of claim 1 to 4, is characterized in that, in long loop prefix frame structure, the 3rd of described Physical Resource Block the OFDM symbol is configured to not carry public guide frequency to the 12 OFDM symbol.
9. method according to any one of claim 1 to 4, it is characterized in that, first OFDM symbol of described Physical Resource Block and subcarrier corresponding to second OFDM symbol are for carrying the public guide frequency of main cooperation cell, wherein, described main cooperation cell is the cooperation cell for sending control signaling in the group of described multiple cooperation cell.
10. the mapping treatment method based on coordinated multipoint transmission and COMP, it is characterized in that, according to the pilot tone mapping mode of antenna port 4, for N number of cooperation cell of same terminal service configures COMP pilot tone respectively on the resource element of Physical Resource Block, wherein, each cooperation cell all maps COMP pilot tone according to the mapping position of antenna port 4;
For each cooperation cell, send the subcarrier of the described COMP pilot signal of carrying and the subcarrier of carrying data;
Receiving terminal merges at the Received signal strength by from each cooperation cell of eating dishes without rice or wine, and obtains merging Received signal strength.
11. methods according to claim 10, is characterized in that, in described Physical Resource Block, the sub-carrier configuration not carrying COMP pilot tone are used for carrying data.
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| CN1694558A (en) * | 2004-05-04 | 2005-11-09 | 阿尔卡特公司 | Method of radio service and antiinterference in OFDM mobile communication system |
| CN101150554A (en) * | 2006-09-19 | 2008-03-26 | 中兴通讯股份有限公司 | A data transmitting method based on OFDM system |
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| CN1694558A (en) * | 2004-05-04 | 2005-11-09 | 阿尔卡特公司 | Method of radio service and antiinterference in OFDM mobile communication system |
| CN101150554A (en) * | 2006-09-19 | 2008-03-26 | 中兴通讯股份有限公司 | A data transmitting method based on OFDM system |
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