WO2012162885A1 - 多用户多输入输出的传输方法、用户设备及基站 - Google Patents
多用户多输入输出的传输方法、用户设备及基站 Download PDFInfo
- Publication number
- WO2012162885A1 WO2012162885A1 PCT/CN2011/075088 CN2011075088W WO2012162885A1 WO 2012162885 A1 WO2012162885 A1 WO 2012162885A1 CN 2011075088 W CN2011075088 W CN 2011075088W WO 2012162885 A1 WO2012162885 A1 WO 2012162885A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- user equipment
- layers
- base station
- user
- served
- Prior art date
Links
Classifications
-
- 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
-
- 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
- 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
- H04B7/0417—Feedback systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
-
- 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
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
Definitions
- Multi-user multiple input and output transmission method user equipment and base station
- the present invention relates to the field of communications, and in particular, to a multi-user multiple input multiple output (MU-MIMO) transmission method, user equipment, and base station.
- MU-MIMO multi-user multiple input multiple output
- LTE Long Term Evolution
- LTE-A dvanced Long Term Evolution Advanced Program
- RRH Remote Radio Head
- Relay Remote Radio Head
- FIG. 1 shows a schematic of this scenario.
- the macro base station 101 and the RRHs 102-107 have the same cell indication, and are connected by optical fibers.
- the RRH is only a radio frequency unit and has no central processing and scheduling capabilities.
- the macro base station processes the data of the entire heterogeneous network, and transmits the RRH related information to the base station of the macro cell through the optical fiber to have higher transmission power, and provides coverage of the entire cell.
- the RRH has a lower transmit power and provides hot spot coverage.
- the macro base station and the RRH can use the same time-frequency resources to transmit data, and the system capacity is improved by this multiplexing.
- the data transmission of the macro cell interferes with the data transmission of the RRH on the same resource. Therefore, interference coordination schemes are needed to further reduce interference and optimize system performance.
- the traditional Almost Blank Subframe (ABS) scheme can be used to reduce mutual interference of data transmission.
- FIG. 2 shows an example diagram of an ABS transmission scheme.
- the Macro transmission point is vacant 1, 3, 5, 7, 9 subframes, and the RRH transmission point preferentially schedules the edge user to transmit in the vacant subframe corresponding to the Macro transmission point, and the other subframe scheduling center user transmits.
- RRH Users of the cell can transmit reliably. It guarantees the reuse of cell center users and increases system capacity compared to traditional homogeneous networks.
- the central user of the RRH transmission point is still interfered by the base station of the Macro cell, which reduces the capacity of the central user of the RRH cell.
- the edge user of the RRH transmission point it has exclusive resources, and the system cannot obtain the multiplexing gain. It can be seen that the interference of the Macro transmission point to the RRH cell user limits the further improvement of the system capacity.
- Multi-user Multiple Input Multiple Output (MU-MIMO) technology utilizes the orthogonality of the spatial domain to reduce interference between users and improve the capacity of the system. It can be used in heterogeneous networks to further increase system capacity. According to the characteristics of the distributed antenna, if a certain user is only served by a part of the antenna, from the perspective of joint virtual MIMO, the joint channel of these users is a reduced rank channel, and this scenario is more suitable for using MU-MIMO technology.
- MU-MIMO technology has the following characteristics in heterogeneous networks: (1) Interference between users is not equal. This is because the macro base station has a higher transmit power, which interferes with RRH users on the same resource; the RRH has a lower transmit power, and it has less interference to Macro users on the same resource. (2) RRH users transmit data at the same time-frequency resource with less interference between each other. (3) The data transmission of the Macro cell interferes with all RRH users.
- Figure 3 shows a schematic diagram of the interference scenario in a heterogeneous network. As can be seen from the figure, the enhanced MU-MIMO technology focuses on suppressing the interference of the Macro Base station to RRH users.
- the inventors have found that the defects of the prior art are: In a heterogeneous network, distributed antennas constitute a virtual MIMO system, and information transmitted by the virtual MIMO system may contain information of multiple users;
- the code-to-layer mapping method is not limited and optimized, and the compromise between feedback overhead, feedback accuracy, and system signaling overhead cannot be obtained.
- the embodiment of the invention provides a multi-user multi-input and output transmission method, a user equipment and a base station, and aims to restrict and optimize the mapping manner of the codeword to the layer, and improve the system. System performance.
- a multi-user multiple input and output transmission method includes:
- the user equipment receives a signaling indication sent by the base station to support the user usage layer indication, where the signaling indication includes a starting layer identifier number and a layer number of the user equipment;
- the received resource is demodulated according to the starting layer identification number and the number of layers of the user equipment; wherein, in the resource, the data corresponding to the same user equipment uses a continuous layer identification number.
- a multi-user multiple input and output transmission method includes:
- the user equipment provides feedback information based on the location of the user equipment for providing relevant interference information.
- a multi-user multiple input and output transmission method includes:
- the base station configures, for the user equipment, a signaling indication that supports the user to use the layer identifier, where the signaling indication includes the starting layer identifier number and the number of layers of the user equipment;
- the user equipment sending the signaling indication to the user equipment, so that the user equipment demodulates the received resource according to the starting layer identifier number and the number of layers; wherein, in the resource, the same one
- the user device's data uses a continuous layer identification number.
- a user equipment is provided, where the user equipment includes:
- a signaling receiver which receives a signaling indication sent by the base station to support a user usage layer indication, where the signaling indication includes a starting layer identifier number and a layer number of the user equipment;
- the resource demodulator demodulates the received resource according to the starting layer identifier number and the number of layers of the user equipment; wherein, in the resource, data corresponding to the same user equipment is marked by a continuous layer number.
- a user equipment is provided, where the user equipment includes:
- a base station configured to provide feedback information according to the location of the user equipment, for providing related interference information.
- a base station includes: a signaling configurator, configured to configure, for a user equipment, a signaling indication that supports a user to use a layer indication, where the signaling indication includes the user The starting layer identification number of the device and the number of layers;
- a signaling transmitter configured to send the signaling indication to the user equipment, so that the user equipment demodulates the received resource according to the starting layer identifier number and the number of layers;
- the data corresponding to the same user equipment uses a continuous layer identification number.
- a computer readable program wherein when the program is executed in a user equipment, the program causes a computer to perform a transmission mode as described above in the user equipment Configuration method.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a configuration method of a transmission mode as described above in a user equipment.
- a computer readable program wherein when the program is executed in a base station, the program causes a computer to execute a configuration method of a transmission mode as described above in the base station .
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a configuration method of a transmission mode as described above in a base station.
- An advantageous effect of the embodiment of the present invention is that the base station configures and sends a signaling indication that supports the user to use the layer indication, and the user equipment demodulates the received resource according to the initial layer identifier number and the number of layers in the signaling indication.
- the codeword-to-layer mapping mode can be further limited and optimized to better achieve a compromise between feedback overhead, feedback accuracy, and system signaling overhead.
- FIG. 1 is a schematic diagram of a scenario composed of a macro base station and a remote radio head in a heterogeneous network
- FIG. 2 is an exemplary diagram of an ABS transmission scheme
- FIG. 3 is a schematic diagram of an interference scenario in a heterogeneous network
- FIG. 4 is a codeword-to-layer mapping relationship of SU-MIMO in an LTE-A system
- FIG. 5 is a schematic diagram of resources used by a DM-RS in each resource block in an LTE-A system
- FIG. 6 is an implementation of the present invention
- FIG. 7 is a diagram showing an example of code-to-layer mapping when indicating information according to an embodiment of the present invention
- FIG. 8 is a schematic diagram of DM-RS resource configuration according to an embodiment of the present invention
- FIG. 9 is a diagram showing an example of a codeword-to-layer mapping in the case of feedback information according to an embodiment of the present invention.
- FIG. 10 is a schematic diagram of a transmission method according to an embodiment of the present invention.
- FIG. 11 is still another schematic flowchart of a transmission method according to an embodiment of the present invention.
- FIG. 12 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- FIG. 13 is still another schematic structural diagram of a user equipment according to an embodiment of the present invention.
- FIG. 14 is still another schematic structural diagram of a user equipment according to an embodiment of the present invention.
- FIG. 15 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- 16 is a schematic diagram of still another structure of a base station according to an embodiment of the present invention.
- FIG. 17 is a diagram showing an example of a system structure of a user equipment according to an embodiment of the present invention.
- FIG. 18 is a diagram showing an example of another system configuration of a user equipment according to an embodiment of the present invention. detailed description
- FIG. 4 is a codeword-to-layer mapping relationship in an LTE-A Single User Multiple Input Multiple Output (SU-MIMO) system.
- the system has a maximum of 2 code words (CW, Code Word) and 8 layers (Layer), each of which contains up to four layers.
- CW code words
- Layer layers
- CQI Channel Quality Indicator
- ACK/NACK acknowledgment message
- a distributed antenna constitutes a virtual MIMO system.
- the information transmitted by the virtual MIMO system may contain information of multiple users, and its code-to-layer mapping method needs further limitation and optimization. A compromise between feedback overhead, feedback accuracy, and system signaling overhead is well achieved.
- the Demodulation Reference Signal (DM-RS) is an important reference signal in the LTE-A system.
- the user equipment uses the DM-RS to estimate the equivalent channel on the MIMO transmission layer and then demodulates the data information based on this equivalent channel.
- Figure 5 is a schematic diagram of resources used by a DM-RS on each resource block in an LTE-A system.
- the equivalent channel can be estimated by distinguishing different transport layers by using joint frequency division and code division.
- the LTE-A system stipulates that when the user performs MU-MIMO transmission, each user occupies no more than 2 layers, and the number of layers is not more than 4, and supports up to 4 users to transmit at the same time.
- the LTE-A system can adopt the transparent MU-MIMO mode, that is, the user equipment does not know whether there are other user equipments and it occupies the same resources to transmit data.
- the rank indication of the user equipment is greater than 2, it must work in single-user mode, and the corresponding rank number is the number of layers transmitted; when the rank indication of the user is not greater than 2, it may work in single-user or multiple User mode, the transport layer sequence number it uses is indicated by signaling.
- the data transmitted by the Macro cell may interfere with the RRH user.
- MU-MIMO technology can reduce interference between users.
- the Macro cell performs data transmission in the null space of the RRH, so only part of the data stream can be selected.
- the limit on the number of layers and the number of layers per user may limit further increases in system capacity and therefore require enhanced DM-RS configuration to support. If the receiving end can know the number of layers used by the system, the receiving end can use advanced receiving algorithms to further suppress interference and improve system performance.
- FIG. 6 is a schematic flowchart of a transmission method according to an embodiment of the present invention. As shown in FIG. 6, on the user equipment side, the method includes:
- Step 601 The user equipment receives, by the base station, a signaling indication that is supported by the user usage layer, where the signaling indication includes a starting layer identifier number and a layer number of the user equipment.
- Step 602 The user equipment demodulates the received resource according to the starting layer identifier number and the number of layers of the user equipment.
- the data corresponding to the same user equipment in the resource uses a continuous layer label number.
- antennas of multiple transmission points in a heterogeneous network constitute virtual MIMO.
- the same time-frequency transmission resource may include data of multiple users, and the base station side needs to perform codeword-to-layer mapping on these data. Also, each user may fall back to the single-user transmission mode, so it may still be necessary for each user to satisfy the single-user codeword-to-layer mapping as described above.
- the layer designation may also be referred to as a stream label, and the number of layers may also be referred to as a sum stream number.
- Rel.10 MU-MIMO uses quasi-orthogonal scrambling codes for different users to distinguish users; therefore, each user's layer label is independent, and the number of layers used for each user can be called the sum layer.
- the user's layers are sorted jointly and can be uniformly indicated.
- the data of the same user equipment in the time-frequency transmission resource uses a continuous layer identification number.
- the data of the user equipment 1 uses the layer identification numbers 10, 11; the data of the user equipment 2 uses the layer identification numbers 20, 21.
- the layer labels occupied by different user equipments are interspersed with each other.
- the data of the user equipment served by the base station is before or after the data of the user equipment served by the remote radio head.
- Macro user The mapping order of the data stream and the RRH data stream is fixed, and thus the relative order of the Macro user and the RRH user layer is determined. For example, if a certain time-frequency resource transmits data of the Macro user, the data of the Macro user is determined. It occupies the previous data stream.
- FIG. 7 is a diagram showing an example of codeword-to-layer mapping when indicating information according to an embodiment of the present invention.
- the user equipment that performs MU-MIMO includes: user equipment UE 0 served by the macro base station, user equipment UE1 served by the RRH 1, and user equipment UE n served by the RRH n.
- the layer identification number is continuous, and the data of UE 0 is before the data of other user equipments.
- the mapping between the codeword and the layer the single-user code-to-layer mapping manner as described above can be used, and details are not described herein again.
- the user estimates the equivalent channel according to the DM-RS port indicated by the signaling, and the reasonable configuration of the DM-RS is important for data demodulation and signaling overhead load.
- the base station side When the user equipment performs transparent MU-MIMO, the base station side only needs to indicate the data layer label used by the user equipment; corresponding to the transparent MU-MIMO signaling design, according to each user's layer in the codeword-to-layer mapping To mark the principle of continuity, the initial layer identification number and the joint indication of the number of layers used by the user equipment can be used.
- the user equipment when the user equipment performs opaque MU-MIMO, it is required to indicate the layer label used by the user equipment and the total number of layers used by MU-MIMO. That is, the signaling indication may further include a sum of layers; and, the user equipment demodulates the received resource according to the starting layer identification number of the user equipment, and the number of layers, and the total number of layers.
- the layers of the user are jointly ordered and can be uniformly indicated.
- the sum of layers can be the number of layers used by multiple users in MU-MIMO.
- FIG. 8 is a schematic diagram of DM-RS resource configuration according to an embodiment of the present invention.
- the Macro cell has 2 antennas
- the RRH1 has 2 antennas
- the RRH2 has 4 antennas.
- the Macro user occupies one data stream
- the RRH1 user occupies two data streams
- the RRH2 user occupies three data streams. Therefore, the system can be regarded as an 8-antenna virtual MIMO system.
- the total number of layers in the system is 6, the Macro user uses the first stream, the RRH1 user uses the 2-3th data stream, and the RRH2 user uses the 4-6th. Data stream.
- the total number of layers is determined by the base station based on the total number of layers used by MU-MIMO. Macro users, as well as RRH users, are instructed according to the actual number of layers used. Table 1 shows a portion of a signaling indication of an embodiment of the present invention.
- Macro UE Sum rank 6 (101) + first layer index (000) + used layer number (00)
- RRH1 UE Sum rank 6 (101) + first layer index (001) + used layer number (01)
- RRH2 UE Sum rank 6 (101) + first layer index (Oi l) + used layer number (10)
- the signaling indication includes the first layer index and the used layer number of the user equipment, and may also include the total layer size (Sum rank) used by the MU-MIMO.
- the signaling may include a 3-bit (up to eight layers) starting layer identification number, and a 2-bit user equipment usage and layer number indication.
- 3-bit information can also be used to indicate the total number of layers used by MU-MIMO. This part of the information can be used to estimate interference, making it easier for the receiver to use advanced receivers to improve performance, such as the Interference Rejection Combination receiver.
- the gain of MU-MIMO is no longer significant, so it can be assumed that each user uses up to 4 layers.
- the number of layers of user equipment is less than or equal to four. In a specific implementation, if the number of layers of the user equipment is greater than 4, SU-MIMO can be used.
- the sum of layers can be determined by the base station based on the location of the user equipment.
- the method may include: if the user equipment is served by the base station, the summing layer is the user equipment and the number of layers; if the user equipment is served by the remote radio head, the summing layer is the user equipment and the number of layers, plus the service by the base station The number of user devices and layers.
- the following actual interference scenarios are considered: The receiving end Macro user is less interfered by the RRH, and the RRH user is less interfered by other RRHs.
- the Macro cell user can be regarded as single-user MIMO regardless of interference from other users. Table 2 shows part of another signaling indication of an embodiment of the present invention.
- Macro UE layer 1 SU, rank 1, layer 1
- Macro UE Sum rank (00) + Used layer number (00) + first layer index (000)
- RRH1 UE layer 2-3 MU, sum rank 3, layer 2-3
- RRH1 UE Sum rank (10) + Used layer number (01) + first layer index (001)
- RRH2 UE layer 4-6 MU, sum rank 4, layer 4-6
- RRH2 UE Sum rank (11) + Used layer number (10) + first layer index (Oi l)
- the RRH1 user is configured to combine the Macro cell data and the self-transmitted data with the layer number of 3 MU-MIMO, which itself uses Layers 2 and 3 to transmit data; the sum of the layers is its own and the number of layers is 2 plus On the Macro UE, the number of layers is 1, and the total number of layers is 3, which is represented by Sum rank (10).
- the RRH2 user is configured to combine the Macro cell data with the self-transmitted data and the layer 4 MU-MIMO, which itself uses layers 4, 5, 6; the sum of the layers is its own and the number of layers 3 plus the layer of the Macro UE
- the number 1, the sum of the layers is 4, expressed by Sum rank (11). Therefore, compared with Table 1, only the 2-bit information is used to indicate the total number of layers used for MU-MIMO.
- a starting layer indication and a combined indication of the number of layers used by the user equipment are used for transparent MU-MIMO.
- opaque MU-MIMO there is still a need to indicate the number of layers of MU-MIMO. Since MU-MIMO only considers the interference of the Macro cell to the RRH, the MU-MIMO and the number of layers seen by a certain user are reduced. If the condition of Rel.10 MU-MIMO and the number of layers is not more than 4, it only needs 2 Bit indication. Thereby, the bits indicated by the signaling are further reduced.
- the above is only a schematic description, but is not limited thereto. In a specific implementation, a specific implementation manner may be determined according to actual conditions.
- the method may further include: providing, by the user equipment, the feedback information by using multiple codewords, and/or each codeword corresponding to one data stream.
- the user equipment is a user equipment served by a base station.
- the mapping manner of multiple codewords may be adopted, or each codeword may be corresponding to one data stream, or feedback information may be provided by using multiple codewords and each codeword corresponding to one data stream.
- the accuracy of the channel quality information of the feedback is improved, and the problem that the traditional codeword-to-layer mapping method cannot accurately feed back the channel quality of the corresponding data stream is solved.
- FIG. 9 is a diagram showing an example of codeword-to-layer mapping when feedback information is performed in an embodiment of the present invention.
- the user equipment UE 0 served by the macro base station performs feedback using codeword 01, codeword 02, ... codeword 0M, and each codeword corresponds to one data stream. Feedback accuracy can be improved to improve the performance of the MU-MIMO system.
- the user equipment demodulates the received resource according to the start layer identifier number and the number of layers in the signaling indication by receiving the signaling indication sent by the base station to support the user usage layer indication.
- the codeword-to-layer mapping manner can be further limited and optimized to better achieve a compromise between feedback overhead, feedback accuracy, and system signaling overhead.
- the embodiment of the present invention further provides a multi-user multi-input and output transmission method.
- the method includes: the user equipment provides feedback information according to the location of the user equipment, to provide related interference information.
- the user equipment side can provide enhanced feedback for MU-MIMO.
- These enhanced feedbacks provide relevant interference information, which may be Precoding Matrix Indicator (PMI) information that is desired for MU-MIMO paired users, and change information of CQI versus single-user MIMO after enhanced MU-MIMO.
- PMI Precoding Matrix Indicator
- the performance of the scheme is good.
- CQI it is also possible to use CQI to change the change information of single-user MIMO after MU-MIMO, which is relatively less expensive.
- the method may further include: determining whether the user equipment is served by the base station or by the remote wireless headset And, if the user equipment is served by the base station, the user equipment feeds back the service information of the base station; if the user equipment is served by the remote radio head, the user equipment feeds back the interference information of the base station and the service information of the remote radio head.
- the service information may be PMI information, CQI information, modulation and coding indication (MCS) information, or the like.
- the interference information may be PMI information, CQI change information, etc. that are intended to be used by the macro cell pairing user. However, it is not limited to this and can be determined based on actual conditions.
- interference between MU-MIMO paired users is not equal. Therefore, the macro cell user is hardly interfered by the RRH and does not need to feed back the MU-MIMO enhanced feedback information; and the RRH cell user needs to feed back the interference information of the Macro cell to enhance the performance of the MU-MIMO.
- This information may be PMI information that is desired to be used by the Macro cell, and CQI information that is relatively single-user MIMO changed after MU-MIMO.
- CQI relative single-user MIMO change information after enhanced MU-MIMO That is to say, users of different transmission point services will have different enhanced MU-MIMO feedback.
- FIG. 10 is a schematic diagram of a transmission method according to an embodiment of the present invention, and preferably shows such an enhanced feedback manner related to UE location.
- the user equipment UE1 served by the base station may only feed back: SU PMI/CQI information, and the user equipment UE2 served by the RRH feeds back SU ⁇ /CQ and MU BCI/delta CQI information.
- the user equipment UE1 served by the base station does not need to feed back MU BCI/delta CQI information compared to the conventional method.
- the method for selecting a transmission point by the UE may be implemented in multiple implementation manners, such as first RSRP measurement reporting or uplink reference signal measurement, and then the base station configures a UE corresponding transmission point through RRC signaling.
- FIG. 11 is another schematic flowchart of the transmission method according to the embodiment of the present invention. As shown in FIG. 11, on the base station side, the method includes:
- Step 1101 The base station configures, for the user equipment, a signaling indication that supports the user to use the layer indication, where the signaling indication includes the starting layer identifier number and the number of layers of the user equipment.
- Step 1102 The base station sends a signaling indication to the user equipment, so that the user equipment demodulates the received resource according to the initial layer identifier number and the number of layers; wherein, in the resource, Data corresponding to the same user device uses a continuous layer identification number.
- the data of the user equipment served by the base station before or after the data of the user equipment served by the remote radio head.
- the signaling indication may further include a sum of layers; and, the user equipment demodulates the received resource according to the starting layer identification number and the number of layers of the user equipment, and the sum of the layers.
- the base station may determine the total number of layers according to the total number of layers used by the multi-user multiple antennas; or the base station determines the total number of layers according to the location of the user equipment.
- the determining, by the base station, the total number of layers according to the location of the user equipment may include: determining, if the user equipment is served by the base station, the total number of layers as the user equipment and the number of layers; if the user equipment is served by the remote wireless head, determining The summing layer is the sum of the user equipment and the number of layers, plus the number of layers of user equipment served by the base station.
- the signaling indication that the user uses the layer indication is supported by the base station, and is sent to the user equipment, so that the user equipment receives the received information according to the initial layer identification number and the number of layers in the signaling indication. Resources are demodulated.
- the code-to-layer mapping method can be further limited and optimized to better achieve feedback cost, feedback accuracy, and compromise of system signaling overhead.
- FIG. 12 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
- the user equipment includes: a signaling receiver 1201 and a resource demodulator 1202;
- the signaling receiver 1201 is configured to receive, by the base station, a signaling indication that is supported by the user usage layer, where the signaling indication includes a starting layer identifier number and a layer number of the user equipment;
- the resource demodulator 1202 is configured to demodulate the received resource according to the starting layer identifier number and the number of layers of the user equipment, where, in the resource, the data corresponding to the same user equipment is used continuously. Layer identification number.
- the data of the user equipment served by the base station is before or after the data of the user equipment served by the remote radio head.
- FIG. 13 is still another schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 13, the user equipment includes: a signaling receiver 1201 and a resource demodulator 1202; as described above.
- the user equipment may further include: an information feedback device 1301;
- the information feedback unit 1301 is configured to provide feedback information by using multiple code words and/or each code word corresponding to one data stream after demodulating the received resources.
- the user equipment demodulates the received resource according to the start layer identifier number and the number of layers in the signaling indication by receiving the signaling indication sent by the base station to support the user usage layer indication.
- the codeword-to-layer mapping manner can be further limited and optimized to better achieve a compromise between feedback overhead, feedback accuracy, and system signaling overhead.
- FIG. 14 is a schematic diagram of still another configuration of the user equipment according to the embodiment of the present invention.
- the user equipment includes: an interference feedback unit 1401; and an interference feedback unit 1401, configured to provide feedback information according to a location of the user equipment, for providing related interference information.
- the user equipment may further include: a location determiner 1402; and a location determiner 1402, configured to determine whether the user equipment is served by the base station or by the remote wireless head;
- the interference feedback device 1401 is specifically configured to: if the user equipment is served by the base station, feed back the service information of the base station; if the user equipment is served by the remote wireless head, feedback the interference information of the base station and the service information of the remote wireless head.
- FIG. 15 is a schematic structural diagram of a base station according to an embodiment of the present invention.
- the base station includes: a signaling configurator 1501 and a signaling transmitter 1502;
- the signaling configurator 1501 is configured to configure, for the user equipment, a signaling indication that supports a user using a layer indication, where the signaling indication includes a starting layer identifier number and a layer number of the user equipment;
- the signaling transmitter 1502 is configured to send the signaling indication to the user equipment, so that the user equipment demodulates the received resource according to the initial layer identifier number and the number of layers; wherein, in the resource, Data corresponding to the same user device uses a continuous layer identification number.
- FIG. 16 is a schematic diagram of still another structure of a base station according to an embodiment of the present invention.
- the base station includes: a signaling configurator 1501 and a signaling transmitter 1502; as described above.
- the signaling indication may further include a sum of layers.
- the base station may further include: a total number determiner 1601;
- the total determiner 1601 is configured to determine the total number of layers according to the total number of layers used by the multi-user multiple input and output; or determine the total number of layers according to the location of the user equipment.
- the base station may further include: a location determiner 1602, configured to determine whether the user equipment is served by the base station or by the remote radio head;
- the total number determiner 1601 is specifically configured to: if the user equipment is served by the base station, determine the total number of layers as the user equipment and the number of layers; if the user equipment is served by the remote wireless head, determine the total number of layers as the user equipment And the number of layers, plus the number of layers of user equipment served by the base station.
- the signaling indication that the user uses the layer indication is supported by the base station, and is sent to the user equipment, so that the user equipment receives the received information according to the initial layer identification number and the number of layers in the signaling indication. Resources are demodulated.
- the code-to-layer mapping method can be further limited and optimized to better achieve feedback cost, feedback accuracy, and compromise of system signaling overhead.
- FIG. 17 is a schematic block diagram showing the system configuration of the user equipment 1700 according to the embodiment of the present invention, which includes the signaling receiver 1201 and the resource demodulator 1202 as described above.
- Figure 18 is a schematic block diagram showing the system configuration of the user equipment 1800 of the embodiment of the present invention, including the interference feedback unit 1401 as previously described.
- the user equipment 1700, 1800 may also include a central processing unit 100, a communication module 110, an input unit 120, an audio processing unit 130, a memory 140, a camera 150, a display 160, and a power supply 170. It is to be noted that Figures 17 and 18 are merely exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
- the central processing unit 100 receives input and controls various portions and operations of the user equipment.
- Input unit 120 provides input to central processor 100.
- the input unit 120 is, for example, a button or a touch input device.
- the camera 150 is for taking image data and providing the taken image data to the central processing unit 100 for use in a conventional manner, for example, for storage, transfer, and the like.
- a power source 170 is used to provide power to the user equipment.
- the display 160 is used to display a display object such as an image or a character.
- the display may be, for example, an LCD display, but is not limited thereto.
- Memory 140 is coupled to central processor 100.
- the memory 140 can be a solid state memory such as a read only memory (ROM), a random access memory (RAM), a SIM card, or the like. It may also be a memory that retains information even when the power is turned off, can be selectively erased, and is provided with more data, an example of which is sometimes referred to as an EPROM or the like. Memory 140 can also be some other type of device.
- Memory 140 includes a buffer memory 141 (sometimes referred to as a buffer).
- the memory 140 may include an application/function storage unit 142 for storing an application and a function program or a flow for executing an operation of the user device through the central processing unit 100.
- the memory 140 can also include a data storage portion 143 for storing data such as contacts, digital data, pictures, sounds, and/or any other data used by the user device.
- the driver storage portion 144 of the memory 140 may include various drivers for the communication functions of the user device and/or for performing other functions of the user device (e.g., messaging applications, address book applications, etc.).
- the communication module 110 is a transmitter/receiver 110 that transmits and receives signals via the antenna 111.
- a communication module (transmitter/receiver) 110 is coupled to the central processing unit 100 to provide an input signal and receive an output signal, which can be the same as in the case of a conventional mobile phone.
- a plurality of communication modules 110 may be provided in the same user equipment.
- a communication module (transmitter/receiver) 110 is also coupled via audio processor 130 to speaker 131 and microphone 132 to provide an audio output via speaker 131 and to receive audio input from microphone 132 to effect the usual telecommunications functions.
- Audio processor 130 may include any suitable buffer, decoder, amplifier, or the like.
- the audio processor 130 is also coupled to the central processing unit 100 so that it is possible to record on the local unit through the microphone 132, and it is possible to play the sound stored on the unit through the speaker 131.
- the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user device, the program causes a computer to execute a multi-user multiple input/output transmission method as described above in the user device.
- An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein The computer readable program causes a computer to perform a multi-user multiple input and output transmission method as described above in a user equipment.
- the embodiment of the present invention also provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute a multi-user multiple input and output transmission method as described above in the base station.
- Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a multiuser multiple input and output transmission method as described above in a base station.
- the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014513026A JP2014520431A (ja) | 2011-06-01 | 2011-06-01 | Mu−mimoの伝送方法、ユーザ装置及び基地局 |
EP11866886.2A EP2717637A4 (en) | 2011-06-01 | 2011-06-01 | METHOD FOR MULTIPLE MULTIPLE INPUT MULTIPLE OUTPUT USER MODE TRANSMISSION, USER EQUIPMENT AND BASE STATION THEREOF |
CN201180070892.7A CN103535092A (zh) | 2011-06-01 | 2011-06-01 | 多用户多输入输出的传输方法、用户设备及基站 |
PCT/CN2011/075088 WO2012162885A1 (zh) | 2011-06-01 | 2011-06-01 | 多用户多输入输出的传输方法、用户设备及基站 |
KR1020137034377A KR20140018399A (ko) | 2011-06-01 | 2011-06-01 | 다중 사용자 다중 입력 다중 출력 송신 방법, 사용자 장비 및 기지국 |
US14/086,568 US20140078997A1 (en) | 2011-06-01 | 2013-11-21 | Multiple user multi-input multi-output transmission method, user equipment and base station |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2011/075088 WO2012162885A1 (zh) | 2011-06-01 | 2011-06-01 | 多用户多输入输出的传输方法、用户设备及基站 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/086,568 Continuation US20140078997A1 (en) | 2011-06-01 | 2013-11-21 | Multiple user multi-input multi-output transmission method, user equipment and base station |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012162885A1 true WO2012162885A1 (zh) | 2012-12-06 |
Family
ID=47258278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2011/075088 WO2012162885A1 (zh) | 2011-06-01 | 2011-06-01 | 多用户多输入输出的传输方法、用户设备及基站 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140078997A1 (zh) |
EP (1) | EP2717637A4 (zh) |
JP (1) | JP2014520431A (zh) |
KR (1) | KR20140018399A (zh) |
CN (1) | CN103535092A (zh) |
WO (1) | WO2012162885A1 (zh) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016164009A1 (en) * | 2015-04-08 | 2016-10-13 | Nokia Solutions And Networks Oy | Multi-user operation |
US11071131B2 (en) * | 2016-01-26 | 2021-07-20 | Ntt Docomo, Inc. | Base station and transmission method |
US10396871B2 (en) | 2017-06-15 | 2019-08-27 | At&T Intellectual Property I, L.P. | Layer mapping subset restriction for 5G wireless communication systems |
WO2019200605A1 (en) | 2018-04-20 | 2019-10-24 | Qualcomm Incorporated | Techniques and apparatuses for signaling regarding rate splitting using first layers and second layers |
US11990957B2 (en) | 2019-06-26 | 2024-05-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Dynamic MU-MIMO layer limit control |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101932096A (zh) * | 2009-06-24 | 2010-12-29 | 中兴通讯股份有限公司 | 多用户多输入多输出模式下层映射信息的通知方法和系统 |
CN102036402A (zh) * | 2009-09-30 | 2011-04-27 | 中兴通讯股份有限公司 | 一种基于解调导频的层映射方法及网络侧设备 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9055561B2 (en) * | 2008-12-18 | 2015-06-09 | Nec Laboratories America, Inc. | MU-MIMO-OFDMA systems and methods for servicing overlapping co-scheduled users |
KR101478316B1 (ko) * | 2009-04-28 | 2014-12-31 | 한국전자통신연구원 | 전용 레퍼런스 시그널 전송 방법 및 전용 레퍼런스 시그널 수신 방법 |
WO2010147882A2 (en) * | 2009-06-19 | 2010-12-23 | Research In Motion Limited | Method and system for signaling transmission layers for single user and multi user mimo |
CN101997655A (zh) * | 2009-08-20 | 2011-03-30 | 富士通株式会社 | 用于实现下行多输入多输出传输的方法和装置 |
WO2011025278A2 (ko) * | 2009-08-26 | 2011-03-03 | 엘지전자 주식회사 | 다중 사용자 mimo 전송을 지원하는 무선 통신 시스템에서 신호를 송수신하는 방법 및 장치 |
CN102076076B (zh) * | 2009-11-20 | 2015-11-25 | 夏普株式会社 | 一种解调参考信号的资源分配通知方法 |
KR101754970B1 (ko) * | 2010-01-12 | 2017-07-06 | 삼성전자주식회사 | 무선 통신 시스템의 채널 상태 측정 기준신호 처리 장치 및 방법 |
CN102237961A (zh) * | 2010-05-04 | 2011-11-09 | 株式会社Ntt都科摩 | 一种多输入多输出相关信息传输方法 |
-
2011
- 2011-06-01 CN CN201180070892.7A patent/CN103535092A/zh active Pending
- 2011-06-01 KR KR1020137034377A patent/KR20140018399A/ko not_active Application Discontinuation
- 2011-06-01 JP JP2014513026A patent/JP2014520431A/ja active Pending
- 2011-06-01 WO PCT/CN2011/075088 patent/WO2012162885A1/zh active Application Filing
- 2011-06-01 EP EP11866886.2A patent/EP2717637A4/en not_active Withdrawn
-
2013
- 2013-11-21 US US14/086,568 patent/US20140078997A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101932096A (zh) * | 2009-06-24 | 2010-12-29 | 中兴通讯股份有限公司 | 多用户多输入多输出模式下层映射信息的通知方法和系统 |
CN102036402A (zh) * | 2009-09-30 | 2011-04-27 | 中兴通讯股份有限公司 | 一种基于解调导频的层映射方法及网络侧设备 |
Also Published As
Publication number | Publication date |
---|---|
CN103535092A (zh) | 2014-01-22 |
KR20140018399A (ko) | 2014-02-12 |
EP2717637A4 (en) | 2015-03-18 |
US20140078997A1 (en) | 2014-03-20 |
JP2014520431A (ja) | 2014-08-21 |
EP2717637A1 (en) | 2014-04-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11843557B2 (en) | Electronic device and communication method for inter-cell interference coordination | |
JP5635096B2 (ja) | シングルユーザ多入力多出力(su−mimo)とマルチユーザmimo(mu−mimo)とをサポートするための方法および装置 | |
CN101800583B (zh) | 用于多用户和多小区mimo传输的系统和方法 | |
US8908790B2 (en) | Method and apparatus for transmitting control signaling for MIMO transmission | |
JP5989801B2 (ja) | マルチアンテナ無線通信システムにおける時間多重化チャネル状態情報通知 | |
US8902845B2 (en) | Communication control method, base station apparatus and mobile station apparatus | |
WO2014167992A1 (ja) | 基地局装置、端末装置、無線通信システム及び集積回路 | |
JP2015133705A (ja) | Hsdpaマルチユーザmimo動作のためのシステムおよび方法 | |
US10356771B2 (en) | Method and device for transmitting downlink information in wireless communication system | |
WO2013000253A1 (zh) | 协作多点传输系统中信息的交互方法及协作多点传输系统 | |
JP2014515583A (ja) | 無線通信システム、そのマスタ・ユニット、およびスレーブ・ユニットでアップリンク無線周波数信号を受信する方法 | |
WO2014101242A1 (zh) | 报告信道状态信息csi的方法、用户设备和基站 | |
WO2018230191A1 (ja) | 送信装置、受信装置、送信方法、受信方法及び記録媒体 | |
WO2017050238A1 (zh) | 传输方式的指示方法及装置 | |
KR102317129B1 (ko) | 복조 참조 신호 오버헤드 감소를 위한 시스템 및 방법 | |
CN107302421B (zh) | 一种功率配置方法及设备 | |
WO2012162885A1 (zh) | 多用户多输入输出的传输方法、用户设备及基站 | |
WO2013064044A1 (zh) | 预编码控制指示反馈方法、用户设备及基站 | |
WO2017028364A1 (zh) | 一种参考信号配置方法及设备 | |
WO2014047819A1 (zh) | 指示导频状态的方法和设备 | |
CN117527010A (zh) | 执行多输入多输出通信的基站和用户设备及其操作方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11866886 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014513026 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011866886 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20137034377 Country of ref document: KR Kind code of ref document: A |