WO2009143710A1 - 一种波束赋型传输的方法、系统及装置 - Google Patents
一种波束赋型传输的方法、系统及装置 Download PDFInfo
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- WO2009143710A1 WO2009143710A1 PCT/CN2009/000594 CN2009000594W WO2009143710A1 WO 2009143710 A1 WO2009143710 A1 WO 2009143710A1 CN 2009000594 W CN2009000594 W CN 2009000594W WO 2009143710 A1 WO2009143710 A1 WO 2009143710A1
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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
- H04B7/06—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
- H04B7/0615—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 of weighted versions of same signal
- H04B7/0617—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 of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- a beamforming transmission method, system and equipment A beamforming transmission method, system and equipment.
- the present invention relates to the field of mobile communications, and in particular to the field of mobile communication multi-antenna technology. Background technique
- the multi-antenna technology of the physical layer has become the key to the next-generation wireless communication system: one of the technologies, the multi-antenna technology has many advantages, such as using the multiplexing gain of multiple antennas to expand the throughput of the system, and using the diversity gain of multiple antennas to improve System performance, using the directional gain of the antenna to distinguish the user from the interference between users and so on.
- the UTE (Long T1 ⁇ 2mi Evokition, Long Term Evolution) system in 3GPP (3rd Generation Partnership Project) supports multiple MIMO (Multiple-Input Multiple-), such as transmit diversity, spatial multiplexing, and beamforming. Output, multiple input and multiple output technology.
- the ⁇ structure of FDD (Frequency Division Duplex) and TDD (Time Division Duplex) in LTE adopts the sub- ⁇ (Subfraine) structure of 1ms, which is shown in Figure 1.
- Shown as a schematic diagram of the TD.D frame structure a half-frame of each TDD radio frame is composed of 5 subframes, each pre-frame is 1 ms, and each subframe is composed of two subframes. 0.5 s S ot constitutes.
- each field includes four 1 long subframes (Subframes) and three special time slots (Special Slots): DwPTS, GP, and UpPTS, three special time slots.
- the total length is i ms.
- the first half includes four 1 ms long child anger and three special bead slots: DwPTS, GP and UpPTS; the second half only has 5 1 ms long Child #1.
- the length of the special time slot DwPTS is determined by the configuration type and the sub-10 and the sub-frame 5 and the DwPTS are reserved for the downlink transmission as shown in the group 2, which is the schematic group of the DwPTS time slot, and the first in the DwPTS time slot.
- Downlink control signaling is transmitted in the first or second OFDM (Orthogonal Frequency Division Multiplexing) symbol, and 72 central subcarriers on the third OFDM symbol are always used for transmitting the cell.
- Search cell Search
- any downlink traffic number can occupy idle resources on the read time slot for transmission, for example, carrying the physical downlink shared channel PDSCH, physical multicast channel? (1.
- the LTE system has the following provisions for downlink beamforming transmission:
- the beamforming user demodulates the physical downlink shared service channel PDSCH by using UE-specific reference signals
- the user-specific reference signal is only shot in the resource block using the shaped transmission
- the user-specific reference signal occupies only one antenna port, that is, the antenna port 5;
- the upper layer needs to inform the terminal whether the user-specific reference signal is used, that is, whether to perform beamforming transmission;
- the cell-specific reference signals on the port 0, i are reserved, and the cell-specific reference signals on the ports 2 and 3 are no longer used.
- the special time slot DwPTS can also support the downlink beamforming transmission.
- the mapping of the user-specific reference signal during the wave shaping transmission in the normal service sub-segment is given.
- ⁇ 3 ⁇ 4 performs beamforming transmission in the special time slot DwPTS, the mapping pattern of the user-specific reference signal is not defined.
- the problem to be solved by the present invention is to propose a method, system and device for Bodong-type transmission, which solves the problem of beamforming transmission in a special time slot DwPTS.
- the present invention discloses a beam-forming transmission method, which comprises the following steps:
- the base station will carry the downlink service number of the user that needs beamforming transmission in the DwPTS time slot and the user-specific reference signal. Mapping according to a predetermined mapping structure, and performing a Bodong shaping process; the base station performs resource block shooting on the shaping processing node, the primary synchronization signal, the control signaling, the cell-specific reference signal, and other user data to form the DwPTS time slot data; the base station transmits the DwPTS time slot data to the terminal.
- a method for beamforming transmission in which a terminal receives DwPTS time slot data sent by a base station, where the DwPTS time slot data includes a shaping processing result, a primary synchronization signal, a control signaling, and a cell.
- the dedicated reference signal and other user numbers are determined by the following manner: The base station will carry the beamforming transmission in the DwPTS slot. i , and ⁇ type processing
- Another aspect of the invention also provides a beamforming transmission system, including! a station and at least one terminal, the base station, configured to map downlink service data and user-specific reference signals of users that need to transmit in the DwPTS time slot according to a predetermined mapping structure, and perform Bodon shaping processing And mapping the result of the shaping process, the primary synchronization signal, the control signaling, the cell-specific reference signal, and other user data to form the DwPTS slot number ⁇ ; the terminal, configured to receive the DwPTS time slot Counting.
- Another aspect of the present invention further provides a base station, including a data processing module and a transmitting module, and a data processing module, configured to carry downlink service data and a user-specific reference signal of a user that needs to be beamformed and transmitted in a DwPTS time slot.
- a base station including a data processing module and a transmitting module, and a data processing module, configured to carry downlink service data and a user-specific reference signal of a user that needs to be beamformed and transmitted in a DwPTS time slot.
- the DwPTS time slot data is transmitted to the terminal.
- the technical solution of the present invention does not additionally add a user-specific reference signal mapping structure, and the beam-forming type transmission in the special time slot DwPTS can be realized by using the technical method of the present invention. Improve system performance without introducing a new user-specific reference signal mapping structure to achieve a single order.
- FIG. 1 is a schematic diagram of a TDD frame structure
- FIG. 2 is a schematic diagram of a DwPTS slot
- 3 is a flow chart of a method for implementing beamforming
- Figure 5 is a user-specific reference signal mapping structure
- 6 is a mapping structure of different configurations of DwPTS slots of a Normal CP
- Figure 7 shows the mapping structure of different configurations of the DwPTS slot of the Extended CP
- Figure 8 is a functional block diagram of the system for beamforming transmission. Concrete real way
- the present invention mainly provides a beamforming transmission method, system and device for performing beamforming transmission in a special time slot DwPTS.
- the technical solution of the invention can not only improve the system performance, but also introduce a new user-specific reference signal mapping structure, and the implementation is simple.
- the present invention provides a beamforming transmission method, comprising the following steps: The base station according to a predetermined downlink data and a user-specific reference signal of a user carrying a beamforming transmission in a DwPTS time slot. Mapping the structure mapping, and performing beamforming processing; the base station performs resource mapping on the shaping processing result, the primary synchronization signal, the control signaling, the cell-specific reference signal, and other user data to form the DwPTS time slot data; The base station sends the DwPTS slot data to a terminal.
- a flowchart for implementing a beamforming method includes the following steps:
- Step A The user data and the user-specific reference signal that are required to be beam-formed in the DwPTS slot are mapped according to a predetermined mapping structure, and beamforming processing is performed.
- the predetermined mapping structure depends on the number of OFDM symbols carried in the DwPTS slot, and the difference in the number of OFDM symbols carried has a different mapping structure.
- the number of OFDM symbols carried in the DwPTS slot depends on the type of the cyclic prefix CP of the OFDM symbol and the specific configuration of the DwPTS slot.
- mapping according to a predetermined mapping structure includes the following steps:
- the base station determines the user-specific reference signal mapping structure according to the type of the cyclic prefix CP; the base station destroys the nth and subsequent OFDM symbols in the user-specific reference signal mapping structure, and only retains the first n OFDM symbols in the user-specific reference signal mapping structure.
- the base station on the physical resource block allocated to the user, the downlink service data and the user-specific reference letter The number is mapped according to the predetermined mapping structure.
- Step B Perform mapping processing on the processing result of the shaping process, the main synchronization signal, the control signaling, the cell-specific reference signal, and other user data to form DwPTS time slot data.
- step B DwPTS slot data conforming to the transport format will be formed.
- control signaling is transmitted on a first or first second OFDM symbol in a DwPTS slot, the primary synchronization signal being at the center of a third OFDM symbol in the DwPTS slot Transmission on 72 subcarriers.
- Step C sending DwPTS slot data.
- the base station transmits DwPTS slot data that can be beamformed on the DwPTS slot to the terminal. Accordingly, the terminal receives data of a DwPTS slot having a beamforming transmission characteristic transmitted by the base station.
- another aspect of the present invention provides a method for beamforming transmission, in which a terminal receives DwPTS time slot data sent by a base station, where the DwPTS time slot data includes a shaping processing result, a primary synchronization signal, and a control signal.
- the cell-specific reference signal and other user data, the result of the shaping process is determined by: the base station carrying downlink service data and user-specific reference signals of users requiring beamforming transmission in the DwPTS time slot
- the mapping is mapped according to a predetermined mapping structure, and beamforming processing is performed.
- the predetermined mapping structure in the DwPTS slot data received by the terminal depends on the number of OFDM symbols carried in the DwPTS slot.
- implementing the predetermined mapping structure mapping in the DwPTS slot data received by the terminal includes the following steps:
- the base station determines the user-specific reference signal mapping structure according to the type of the cyclic prefix CP; the base station destroys the nth and subsequent OFDM symbols in the user-specific reference signal mapping structure, and only retains the first n OFDM symbols in the user-specific reference signal mapping structure. , as a predetermined mapping structure; The base station maps the downlink service data and the user-specific reference signal according to the predetermined mapping structure on the physical resource block allocated to the user.
- the control signaling in the DwPTS slot data received by the terminal is transmitted on the first or first second OFDM symbol in the DwPTS slot, and the primary synchronization signal is the third in the DwPTS slot.
- the OFDM symbols are transmitted on the center 72 subcarriers.
- the beamforming transmission method of this embodiment specifically includes the following processes:
- each OFDM symbol in a normal Normal CP subframe has a length of 2192 Ts, and a total of 14 OFDM symbols are included in the entire subframe.
- Extended Extended CP Each OFDM symbol in the subframe has a length of 2560 Ts, and a total of 12 OFDM symbols are included in the entire subframe.
- the DwPTS slot may carry 3, 9, 10, 11, and 12 OFDM symbols, and there are five different cases; for a subframe carrying the Extended CP, The DwPTS slot may carry 3, 8, 9, 10 OFDM symbols, and there are four different cases.
- downlink control signaling is transmitted in the first or first second OFDM symbol in the DwPTS slot, and 72 central subcarriers on the third OFDM symbol are always used for transmission.
- Primary sync signal for Cell Search Except for the broadcast channel PBCH, any downlink service data can occupy idle resources on the time slot for transmission, for example, carrying a physical downlink shared channel PDSCH, a physical multicast channel PMCH, and the like.
- the base station first needs to determine the format of the transmission frame, and determine whether the CP of the OFDM symbol carried by the current DwPTS slot is of the Normal type or the Extended type, because different CP types,
- the configuration of DwPTS slots is different.
- S102 Determine a configuration of a DwPTS slot.
- the base station determines the number of OFDM symbols carried in the DwPTS slot for different CP types.
- the base station can determine the length T of the DwPTS slot and the length To of one OFDM symbol, so that the base station can obtain the DwPTS slot bearer.
- the number of OFDM symbols n, where n T/To.
- Base station The downlink service data and the user-specific reference signal of the user that needs to be beam-formed in the DwPTS slot are mapped according to a predetermined mapping structure, and beamforming processing is performed.
- the configuration of the DwPTS time slot should not be limited to the mode of Table 1 in this embodiment, and various adjustments can be made to the configuration parameters of the DwPTS time slot, and the change should be the protection scope of the present invention. Covered.
- the beamforming transmission is performed on the special time slot DwPTS, that is, the base station maps the downlink service data of the user that needs to be beamformed and transmitted in the DwPTS time slot and the user-specific reference signal according to a predetermined mapping structure, and performs beamforming processing.
- the base station After S101, the base station has determined the type of the cyclic prefix CP of the OFDM symbol in the DwPTS slot.
- there are mapping structures of different user-specific reference signals where the mapping structure of the user-specific reference signals is used when the user performs beamforming transmission in a normal service subframe.
- the user-specific reference signal mapping structure used.
- the left picture A is the user-specific reference signal mapping structure of the Normal CP
- the right picture B is the user-specific reference signal mapping structure of the Extended CP. Since the cell-specific reference signal is transmitted in each downlink subframe, the entire system bandwidth is covered in the frequency domain, and the entire downlink subframe is spanned in time.
- the block portion of the grid in the figure indicates the cell-specific reference on the port 0, 1. signal.
- the user-specific reference signal is only used in the data portion of the physical resource block allocated to the user for beamforming, and when it is present in one subframe at the same time as the cell-specific reference signal, it will be multiplexed in the manner shown in FIG. It represents the user-specific reference signal.
- the base station can determine the mapping structure of the user-specific reference signal based on the type of the cyclic prefix CP.
- the base station determines and determines the number n of OFDM symbols.
- the base station cancels the nth and subsequent OFDM symbols in the user-specific reference signal mapping structure, and only retains the first n OFDM symbols in the corresponding user-specific reference signal mapping structure as a predetermined mapping structure.
- the base station maps the downlink service data of the user requiring beamforming transmission and the user-specific reference signal according to the mapping structure remaining after being destroyed on the physical resource block allocated to the user.
- the mapping structure of different configuration modes of the DwPTS slot of the Normal CP where the DwPTS slot carries 12, 11, 10, and 9 OFDM symbols respectively, the unnecessary OFDM is cancelled.
- is Extended CP The mapping structure of different configuration modes of the DwPTS slot, wherein the DwPTS slot carries 10, 9, and 8 OFDM symbols, respectively, and the remaining mapping structure after the unnecessary OFDM symbols are removed.
- the block portion of the grid represents a cell-specific reference signal, indicating a user-specific reference signal. Therefore, the OFDM symbol that is destroyed may include a resource unit that carries a user-specific reference signal in addition to the resource unit that carries the data symbol.
- the base station uses the same shaping matrix for beamforming the downlink service data and the user-specific reference signal, Form data.
- the system allocates resources to users in units of physical resource blocks, and each physical resource block includes 12 subcarriers.
- the base station performs resource mapping on the shaping data, the primary synchronization signal, the control signaling, the cell-specific reference signal, and other user data through the shaping matrix to form DwPTS time slot data, wherein the control signaling is in the DwPTS time slot.
- the primary synchronization signal is transmitted on the center 72 subcarriers of the third OFDM symbol in the DwPTS slot.
- mapping structure of the user-specific reference signal should not be limited to the mode illustrated in this embodiment, and various adjustments can be made to the mapping structure of the user-specific reference signal, and the technical solution of the present invention still applies. The changes should be covered by the scope of protection of the invention.
- the system functional structure diagram of the beamforming transmission proposed by the present invention includes a base station and at least one terminal.
- the base station 100 is configured to map the downlink service data and the user-specific reference signal of the user that needs to be beamformed and transmitted in the DwPTS time slot according to a predetermined mapping structure, perform beamforming processing, and process the result of the shaping process.
- the synchronization signal, the control signaling, the cell-specific reference signal, and other user data are used for resource mapping to form DwPTS time slot data; and the terminal 200 is configured to receive DwPTS time slot data.
- the base station 100 of the present invention includes a data processing module 110 and a transmitting module 120.
- the data processing module 110 is configured to map the downlink service data and the user-specific reference signal of the user that needs to be beamformed and transmitted in the DwPTS time slot according to a predetermined mapping structure, and perform beamforming processing, and Mapping the result of the shaping process, the primary synchronization signal, the control signaling, the cell-specific reference signal, and other user data to form DwPTS time slot data;
- the transmitting module 120 is configured to send the DwPTS time slot data obtained by the data processing module 110 to the terminal. 200 launches.
- the data processing module 110 further includes a judging module 111, a resource mapping module 112, and an embedding processing module 113.
- the determining module 111 is configured to obtain the number of OFDM symbols carried in the DwPTS slot, determine the length T of the DwPTS slot and the length To of one OFDM symbol according to the type of the cyclic prefix CP of the OFDM symbol and the specific configuration of the DwPTS slot.
- the resource mapping module 112 is configured to map the downlink service data and the user-specific reference signal of the user that needs to be beamformed and transmitted in the DwPTS slot according to a predetermined mapping.
- the structure is mapped, and the shaping processing result is obtained by the shaping processing module 113, and the processing results of the shaping processing, the main synchronization signal, the control signaling, the cell-specific reference signal, and other user data are mapped to form DwPTS time slot data;
- the type processing module 113 is configured to perform U-type processing on the downlink service data and the user-specific reference signal mapped by the resource mapping module 112 according to the predetermined mapping structure.
- the resource mapping module 112 includes a structure selection module 1121 and a structure mapping module 1122.
- the structure selection module 1121 is configured to determine a user-specific reference signal mapping structure according to the type of the cyclic prefix CP.
- the structure mapping module 1122 is configured to: remove the nth and subsequent OFDM symbols in the user-specific reference signal mapping structure, The first n OFDM symbols in the user-specific reference signal mapping structure are reserved as a predetermined mapping structure, and the downlink service data and the user-specific reference signal are mapped on a physical resource block allocated to the user according to a predetermined mapping structure.
- each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
- the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
- the integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
- the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
- the above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2010013096A MX2010013096A (es) | 2008-05-27 | 2009-05-26 | Un método, sistema y dispositivo para transmisión de conformación de haz. |
EP17163627.7A EP3206307B1 (en) | 2008-05-27 | 2009-05-26 | A method, system and device for beam forming transmission |
JP2011510807A JP5113939B2 (ja) | 2008-05-27 | 2009-05-26 | ビームフォーミング伝送の方法、システムおよび装置 |
EP09753428.3A EP2290836B1 (en) | 2008-05-27 | 2009-05-26 | Method, system and device for beam shaping transmission |
US12/995,060 US8526295B2 (en) | 2008-05-27 | 2009-05-26 | Method, system and device for beam shaping transmission |
Applications Claiming Priority (2)
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CN200810113008.3 | 2008-05-27 | ||
CN200810113008.3A CN101594175B (zh) | 2008-05-27 | 2008-05-27 | 一种波束赋型传输的方法、系统及装置 |
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WO2009143710A1 true WO2009143710A1 (zh) | 2009-12-03 |
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PCT/CN2009/000594 WO2009143710A1 (zh) | 2008-05-27 | 2009-05-26 | 一种波束赋型传输的方法、系统及装置 |
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US (1) | US8526295B2 (zh) |
EP (2) | EP2290836B1 (zh) |
JP (1) | JP5113939B2 (zh) |
KR (1) | KR101210246B1 (zh) |
CN (1) | CN101594175B (zh) |
MX (1) | MX2010013096A (zh) |
WO (1) | WO2009143710A1 (zh) |
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EP2290836A1 (en) | 2011-03-02 |
EP2290836B1 (en) | 2017-07-12 |
MX2010013096A (es) | 2011-02-23 |
JP5113939B2 (ja) | 2013-01-09 |
US20110122837A1 (en) | 2011-05-26 |
KR101210246B1 (ko) | 2012-12-18 |
EP3206307B1 (en) | 2019-01-30 |
EP2290836A4 (en) | 2016-03-02 |
CN101594175A (zh) | 2009-12-02 |
US8526295B2 (en) | 2013-09-03 |
CN101594175B (zh) | 2012-12-26 |
EP3206307A1 (en) | 2017-08-16 |
JP2011523540A (ja) | 2011-08-11 |
KR20110034618A (ko) | 2011-04-05 |
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