WO2013107411A1 - 数据的传输方法及装置 - Google Patents
数据的传输方法及装置 Download PDFInfo
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- 238000010586 diagram Methods 0.000 description 11
- 238000004590 computer program Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0684—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using different training sequences per antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0606—Space-frequency coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0643—Properties of the code block codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
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- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
Definitions
- the present invention relates to the field of communication systems, and in particular, to a data transmission method and apparatus.
- LTE Long Term Evolution
- eNB evolved Node B
- the PDCCH Physical Downlink Control Channel
- e-PDCCH Enhanced Physical Downlink Control Channel
- the resources allocated to the e-PDCCH are highly flexible, and are no longer subject to three OFDM (Orthogonal Frequency Division Multiplexing) symbols, thereby improving the capacity of the PDCCH or simultaneously scheduling user equipment.
- the e-PDCCH can also use a DMRS (UE-specific Reference Signal)-based transmission mode, which can achieve spatial reuse to improve the transmission efficiency of the control channel.
- DMRS UE-specific Reference Signal
- the embodiment of the invention provides a data transmission method and device, which solves the problem that two types of transmission diversity schemes are used when transmitting data in the transmission diversity mode based on the RS, and the eNB and the UE are increased (the complexity of the user transmission and reception)
- the technical solution adopted by the embodiment of the present invention is: a data transmission method, including:
- each of the second resource groups can carry at least two reference signals, where the at least two reference signals are included
- Each reference signal corresponds to a different antenna port; the data to be transmitted is encoded to generate two data streams;
- the two data streams are respectively mapped to available resource units of two different antenna ports, and the reference signals corresponding to the two different antenna ports are respectively carried in two different first groups of the first resource group.
- Data on the two antenna ports is transmitted on available resource elements of the two different antenna ports.
- a data transmission device includes:
- a setting unit configured to set at least two second resource groups in each of the at least one first resource group, where each of the second resource groups can carry at least two reference signals, where the at least two reference signals Each of the two reference signals respectively corresponds to a different antenna port;
- a generating unit configured to encode the data to be sent to generate two data streams
- a mapping unit configured to map the two data streams generated by the generating unit to the available resource units of two different antenna ports, where the corresponding reference signals of the two different antenna ports are respectively carried in the setting And transmitting, by the sending unit, the mapping unit is mapped to the two antenna ports on the available resource units of the two different antenna ports. The data on it.
- the data transmission method and apparatus provided by the embodiment of the present invention firstly set at least two groups of second resource groups in each of the at least one first resource group, and set at least each group of the second resource group Two reference signals, which are then encoded to generate two data streams, and then the two data streams are respectively mapped to available resource units of two different antenna ports, the two different antennas
- the reference signals respectively corresponding to the ports are set on two different groups of second resource groups, and finally the data on the two antenna ports is transmitted on the available resource units of the two different antenna ports.
- data transmission can be performed by using both SFBC and STBC at the same time
- the data transmission of one e-PDCCH requires two transmission diversity schemes, thereby increasing the complexity of transmission and reception of the eNB and the UE.
- the embodiment of the present invention only needs a transmission diversity scheme to perform data transmission, and solves the problem of increasing the complexity of transmission and reception of the eNB and the UE.
- FIG. 1 is a flowchart of a method for transmitting data according to Embodiment 1 of the present invention
- FIG. 2 is a schematic structural diagram of a data transmission apparatus according to Embodiment 1 of the present invention.
- FIG. 3 is a flowchart of a method for transmitting data according to Embodiment 2 of the present invention.
- FIG. 4 is a schematic structural diagram of a data transmission apparatus according to Embodiment 2 of the present invention.
- 5 is a schematic diagram of physical resource block pairs of DMRS port 7; 6 is a schematic diagram of physical resource block pairs of DMRS port 8;
- FIG. 7 is a schematic diagram of physical resource block pairs of DMRS port 9;
- FIG. 9 is a schematic diagram of coding of physical resource block pairs of DMRS port 7.
- FIG. 10 is a schematic diagram of coding of physical resource block pairs of DMRS port 8.
- 11 is a schematic diagram of coding of physical resource block pairs of DMRS port 9;
- FIG. 12 is a schematic diagram of coding of physical resource block pairs of the DMRS port 10;
- Figure 13 is a schematic diagram of interference between different RRHs.
- This embodiment provides a data transmission method. As shown in FIG. 1, the method includes:
- each of the second resource groups can carry at least two reference signals, where the at least two references Each of the reference signals in the signal corresponds to a different antenna port, wherein the first resource group may be a physical resource block pair, and the second resource group may be a resource unit RE, where the at least two reference signals are Each reference signal corresponds to one antenna port, and each of the second resource groups is orthogonal to each other in time and frequency, and each of the second resource groups includes 12 of the REs.
- DMRS ports 7 ⁇ 14 eight antenna ports are defined as DMRS ports 7 ⁇ 14 , one for each DMRS port.
- DMRS the information of each DMRS includes the time-frequency resources occupied by the DMRS and the DMRS sequence.
- the DMRS associated with the DMRS port ⁇ 7, 8, 11, 13 ⁇ is defined or set on 12 REs on a physical resource block pair (PRB pair).
- PRB pair a physical resource block pair
- one physical resource block includes 12 consecutive subcarriers in the frequency domain, and 7 consecutive OFDM symbols are included in the time domain
- one physical resource block pair refers to two physical resource blocks that are consecutive in time, for example, one.
- the physical resource block pair includes 12 consecutive subcarriers in the frequency domain, and the time domain includes 14 consecutive OFDM symbols, where the first 7 OFDM symbols belong to the first physical resource block, and the latter 7 OFDM symbols belong to the second. Physical resource blocks.
- the DMRS associated with the DMRS port ⁇ 9, 10, 12, 14 ⁇ is defined or set on another 12 REs on the same PRB pair.
- Figure 5 to Figure 8 show the time-frequency resources occupied by four DMRS ports ⁇ 7, 8 ⁇ and ⁇ 9, 10 ⁇ in one PRB pair, respectively. Ports 7 and 8 occupy the same time-frequency resources, but they pass The DMRS sequences associated with each other are distinguished; ports 9 and 10 are similar.
- the DMRSs associated with the ports ⁇ 7, 8, 11, 13 ⁇ occupy the same time-frequency resources and are distinguished by the DMRS sequence; the associated ports ⁇ 9.10, 12, 14 ⁇ are associated with each other.
- the DMRS occupies the same time-frequency resources and is distinguished by the DMRS sequence.
- the coding mode is space frequency coding or space time coding
- the encoding may also be precoding, that is, precoding operation on data to be transmitted, since space frequency coding or space time coding may be expressed as a special implementation of precoding.
- precoding that is, precoding operation on data to be transmitted, since space frequency coding or space time coding may be expressed as a special implementation of precoding.
- the specific operation of the precoding is related to the reference signal used to transmit the data.
- the precoding operation When the reference signal used is a cell-specific reference signal, such as a CRS (cell-specific reference signal) in the LTE system, the precoding operation at this time pre-codes the data through a precoding matrix or vector, and then precodes Each of the subsequent data streams corresponds to an antenna port corresponding to one CRS; when the reference signal used is a user equipment specific reference signal, such as a DMRSOJE-specific reference signal in an LTE system, the precoding operation is data Corresponding to the antenna port corresponding to one DMRS, the corresponding data stream is obtained. For example, precoding operation )[,]— x(.)(,)
- N 0,1, -,Nl, N is an integer representing data x(.) () directly corresponds to DMRS antenna port 7, [,] ⁇ (1) () The data ⁇ (1 )( ) directly corresponds to the DMRS antenna port 8, and the corresponding data streams are respectively
- the first data stream corresponds to an antenna port corresponding to the reference signal in the first second resource in the first resource group
- the second data stream corresponds to the second resource group.
- the length of the two data streams generated after the data is encoded may be equal or unequal.
- the data to be transmitted is x(0), x(l), —, x(Nl), and N is an even number, which is subjected to space-frequency coding or space-time coding to obtain two data streams of equal length;
- the DMRS ports used in a first resource group are 7 and 9.
- the respective values of L, L 4 may be 0; here are assumed to have two first resource groups, and the DMRS ports used in the first first resource group are 7 and 9, in the second first resource group.
- the DMRS ports used are 8 and 10.
- the reference signals respectively corresponding to the two different antenna ports are set on two different groups of second resource groups.
- the available resource unit of each antenna port refers to a resource unit that can be used to transmit the data stream generated by the coding, for example, except for the PDCCH and the resource unit occupied by the reference signal, other resource units can be used to transmit the data stream.
- the embodiment provides a data transmission device.
- the device includes: a setting unit 21, a generating unit 22, a mapping unit 23, and a sending unit 24.
- the setting unit 21 is configured to set at least two second resource groups in each of the at least one first resource group, where each of the second resource groups can carry at least two reference signals, where Each of the at least two reference signals corresponds to a different antenna port.
- the first resource group is a physical resource block pair
- the second resource group is a resource unit RE
- each of the at least two reference signals respectively corresponds to one antenna port
- the resource groups are orthogonal to each other in time and frequency, and each of the second resource groups includes 12 of the REs.
- each DMRS port corresponds to one DMRS .
- the information of each DMRS includes the time-frequency resources occupied by the DMRS and the DMRS sequence.
- the DMRS associated with the DMRS port ⁇ 7, 8, 11, 13 ⁇ is defined or set on 12 REs on a physical resource block pair (PRB pa i r ).
- PRB pa i r a physical resource block pair
- one physical resource block includes 12 consecutive subcarriers in the frequency domain, and 7 consecutive OFDM symbols are included in the time domain, and one physical resource block pair refers to two physical resource blocks that are consecutive in time, for example, one.
- the physical resource block pair includes 12 consecutive subcarriers in the frequency domain, and the time domain includes 14 consecutive OFDM symbols, where the first 7 OFDM symbols belong to the first physical resource block, and the latter 7 OFDM symbols belong to the second. Physical resource blocks.
- the DMRS associated with the DMRS port ⁇ 9, 10, 12, 14 ⁇ is defined or set on the other 12 REs on the same PRB pa i r.
- Figure 5 to Figure 8 show the time-frequency resources occupied by four DMRS ports ⁇ 7, 8 ⁇ and ⁇ 9, 10 ⁇ in one PRB pa ir, respectively. Ports 7 and 8 occupy the same time-frequency resources, but they Distinguish by the DMRS sequences associated with each other; ports 9 and 10 are similar.
- the DMRSs associated with the ports ⁇ 7, 8, 11, 13 ⁇ occupy the same time-frequency resources and are distinguished by the DMRS sequence; the same port ⁇ 9. 10, 12, 14 ⁇
- the associated DMRS occupies the same time-frequency resource and is distinguished by the DMRS sequence.
- the generating unit 22 is configured to encode the data to be sent to generate two data streams.
- the coding mode is space frequency coding or space time coding;
- the coding may also be precoding, that is, precoding operation on data to be transmitted, because space frequency coding or space time coding may be represented as a special implementation of precoding.
- the mapping unit 23 is configured to map the two data streams generated by the generating unit 22 to available resource units of two different antenna ports.
- the reference signals corresponding to the two different antenna ports are respectively set on the second resource group of two different groups.
- the available resource unit of each antenna port refers to a resource unit that can be used to transmit the data stream generated by the code, for example, except for the resource unit occupied by the PDCCH and the reference signal, other resource units can be used to transmit the data stream.
- the sending unit 24 is configured to send data mapped by the mapping unit 23 to the two antenna ports on the available resource units of the two different antenna ports.
- the data transmission method and apparatus firstly set at least two groups of second resource groups in each of the at least one first resource group, and set at least each group of the second resource group Two reference signals, which are then encoded to generate two data streams, and then the two data streams are respectively mapped to available resource units of two different antenna ports, the two different antennas
- the reference signals respectively corresponding to the ports are set on two different groups of second resource groups, and finally the data on the two antenna ports is transmitted on the available resource units of the two different antenna ports.
- the embodiment of the present invention only needs a transmit diversity scheme to perform data transmission, and solves the problem of increasing the complexity of transmission and reception of the eNB and the UE, and the problem of poor channel estimation performance, and the time-frequency divided orthogonal reference signal. Channel estimation performance is also improved.
- This embodiment provides a data transmission method. As shown in FIG. 3, the method includes:
- the first resource group is a physical resource block pair
- the second resource group is a resource unit RE
- each of the at least two reference signals respectively corresponds to one antenna port
- the resource groups are orthogonal to each other in time and frequency, and each of the second resource groups includes 12 of the REs.
- the coding mode is space frequency coding or space time coding
- the coding may also be precoding, that is, precoding operation on data to be transmitted, because space frequency coding or space time coding may be represented as a special implementation of precoding.
- the reference signals corresponding to the two different antenna ports are respectively set on the second resource group of two different groups.
- the antenna port is a DMRS port.
- two sets of second resource groups RE are defined in the first resource group PRB pa ir , where each group of resource units includes 12 REs, and the two sets of REs are time-frequency orthogonal; two reference signals are defined on the 12 REs of the first group, the two reference signals correspond to DMRS ports 7 and 8, respectively, and the second group of 12 Two other reference signals are defined on the REs, corresponding to DMRS ports 9 and 10, respectively.
- the two antenna ports used in this embodiment are respectively associated with reference signals defined on the first group and the second group of 12 REs, such as DMRS ports 7 and 9, DMRS ports 8 and 10, DMRS ports 8 and 9, DMRS. Ports 8 and 10. Further, the two ports used are DMRS ports 7 and 9, and the transmit diversity scheme used is SFBC, and the SFBC encodes the e-PDCCH data to be transmitted to obtain two data streams, and the two data streams are respectively mapped in On the DMRS ports 7 and 9, as shown in FIG. 9 and FIG. 10, the first three columns of REs in the figure are PDCCH regions, that is, the resource elements are unavailable, and "1" on the same time-frequency resource location on the two ports.
- the resource elements marked “1" and “2" are available resource units.
- the transmit diversity scheme in the embodiment of the present invention is not limited to SFBC.
- the available OFDM symbols in a PRB pair are even, as shown in FIG. 11 and FIG. 12, the available OFDM symbols are two, and STBC may also be used.
- the first two columns RE in the figure are the PDCCH region, that is, this part of the resource unit is unavailable.
- the allocated antenna is separated.
- the port is sent.
- multiple RRHs are disposed in addition to the macro base station in the coverage of one macro cell, and the RRHs are connected to the macro base station by using optical fibers or other manners, and the RRHs have macro cells with them.
- ID Due to the DMRS based transmission mode, each RRH can serve some users separately, but each RRH is transparent to the user.
- the UE served by one RRH border will be interfered by another neighboring RRH.
- the UE_5 of the RRH2 service will be interfered by RRH1.
- the impact of the interference on the RS interference is more serious, because the DMRS is used for channel estimation, and the estimated channel is used to detect the data channel.
- different DMRS ports can be assigned. Different RRHs or UEs to avoid interference between DMRSs. Without loss of generality, here is a concrete example.
- RRH1 and RRH2 in Figure 13 can be used to assign RRH1 or UEs served in RRH1.
- the assigned DMRS ports are 7 and 9, respectively, and the DMRS ports assigned to RRH 2 or UEs served in RRH 2 are 8 and 10, respectively.
- the UE in each RRH only needs to use one transmit diversity scheme SFBC when transmitting; in addition, the DMRS sequences associated with DMRS ports 7 and 8 (or 9 and 10) defined in the same group of resource units are orthogonal. Or quasi-orthogonal, so that interference between two RRHs out of the DMRS of the UE can be avoided or reduced, thereby improving channel estimation performance.
- the at least two PRB pa irs may be continuous or discrete in the frequency domain, preferably discrete.
- each e_PDCCH may be separately mapped to some of the four PRB pa irs.
- the e_PDCCH of the UE1 is divided into four parts, and the four parts are respectively mapped to the PRB pa i rl ⁇ 4 On the REs on the 4 and 5 OFDM symbols; or interleaving the e-PDCCHs of at least two UEs, and then mapping the interleaved data in the 4 PRB pa ir according to a certain rule.
- the embodiment provides a data transmission device.
- the device includes: a setting unit 41, a generating unit 42, a mapping unit 43, a sending unit 44, and an allocating unit 45.
- the setting unit 41 is configured to set at least two groups of second resource groups in each of the at least one first resource group, and can carry at least two reference signals in each group of the second resource group.
- the first resource group is a physical resource block pair
- the second resource group is a resource unit RE
- each of the at least two reference signals respectively corresponds to one antenna port
- the resource groups are orthogonal to each other in time and frequency, and each of the second resource groups includes 12 of the REs.
- the generating unit 42 is configured to encode the data to be sent to generate two data streams.
- the coding mode is space frequency coding or space time coding
- the coding may also be precoding, that is, precoding operation on data to be transmitted, because space frequency coding or space time coding may be represented as a special implementation of precoding.
- the mapping unit 43 is configured to map the two data streams generated by the generating unit 42 to two Different antenna ports are available on the resource unit.
- the reference signals corresponding to the two different antenna ports are respectively carried on two different groups of the second resource group.
- the sending unit 44 is configured to send data mapped by the mapping unit 43 to the two antenna ports on the available resource units of the two different antenna ports.
- the allocating unit 45 is configured to: when at least two remote radio units are connected to the base station, and one of the at least two remote radio units provides services for the user equipment, respectively, the at least two remote radio units Different antenna ports set by the setting unit are allocated and transmitted by the mapping unit to the antenna port allocated by the allocation unit for transmission.
- the data transmission method and apparatus provided by the embodiment of the present invention firstly set at least two groups of second resource groups in each of the at least one first resource group, and set at least each group of the second resource group Two reference signals, which are then encoded to generate two data streams, and then the two data streams are respectively mapped to available resource units of two different antenna ports, the two different antennas
- the reference signals respectively corresponding to the ports are set on two different groups of second resource groups, and finally the data on the two antenna ports is transmitted on the available resource units of the two different antenna ports.
- data transmission can be performed by using both SFBC and STBC at the same time
- the data transmission of one e-PDCCH requires two transmission diversity schemes, thereby increasing the complexity of transmission and reception of the eNB and the UE.
- the embodiment of the present invention only needs a transmission diversity scheme to perform data transmission, and solves the problem of increasing the complexity of transmission and reception of the eNB and the UE, and the time-frequency orthogonal reference signal improves the performance of channel estimation.
- the data transmission apparatus provided by the embodiment of the present invention may implement the foregoing method embodiments.
- the data transmission method and apparatus provided by the embodiments of the present invention can be applied to the field of communication systems, but are not limited thereto.
- the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
- ROM read-only memory
- RAM random access memory
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Abstract
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Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2861928A CA2861928C (en) | 2012-01-21 | 2013-01-21 | Method and apparatus for transmitting data |
RU2014134197/07A RU2590913C2 (ru) | 2012-01-21 | 2013-01-21 | Способ и устройство передачи данных |
EP13738460.8A EP2797275B1 (en) | 2012-01-21 | 2013-01-21 | Data transmission method and apparatus |
EP21205481.1A EP4044541B1 (en) | 2012-01-21 | 2013-01-21 | Method and apparatus for transmitting data |
JP2014552505A JP5985656B2 (ja) | 2012-01-21 | 2013-01-21 | データを送信するための方法と装置 |
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EP2797275A1 (en) | 2014-10-29 |
JP2016226012A (ja) | 2016-12-28 |
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US20190097691A1 (en) | 2019-03-28 |
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CA2861928C (en) | 2019-03-05 |
CN107733511A (zh) | 2018-02-23 |
EP4044541A1 (en) | 2022-08-17 |
JP2015510318A (ja) | 2015-04-02 |
CN103220029A (zh) | 2013-07-24 |
US9306652B2 (en) | 2016-04-05 |
JP2020123969A (ja) | 2020-08-13 |
JP5985656B2 (ja) | 2016-09-06 |
RU2590913C2 (ru) | 2016-07-10 |
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JP7105824B2 (ja) | 2022-07-25 |
CN107733511B (zh) | 2021-02-26 |
CN107645329A (zh) | 2018-01-30 |
US10079624B2 (en) | 2018-09-18 |
US20140355709A1 (en) | 2014-12-04 |
US20200328781A1 (en) | 2020-10-15 |
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CN107645329B (zh) | 2021-02-26 |
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