WO2010135924A1 - 通信装置、通信方法和基站 - Google Patents
通信装置、通信方法和基站 Download PDFInfo
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- WO2010135924A1 WO2010135924A1 PCT/CN2010/070923 CN2010070923W WO2010135924A1 WO 2010135924 A1 WO2010135924 A1 WO 2010135924A1 CN 2010070923 W CN2010070923 W CN 2010070923W WO 2010135924 A1 WO2010135924 A1 WO 2010135924A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- base station
- precoding matrix
- communication device
- output mode
- Prior art date
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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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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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
- H04B7/0426—Power distribution
- H04B7/0434—Power distribution using multiple eigenmodes
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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
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
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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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
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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
- H04L25/03—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
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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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
- H04L2025/03802—Signalling on the reverse channel
- H04L2025/03808—Transmission of equaliser coefficients
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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
- H04L5/0037—Inter-user or inter-terminal allocation
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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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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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
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
Definitions
- the present invention relates to communication systems, and in particular to communication systems employing MIMO technology. Background technique
- the base station communicates with multiple terminals.
- multiple transmitting antennas of the base station and receiving antennas of the terminal there are many multi-antenna technologies that can be used.
- MIMO Multi-Input Multi-Output
- MIMO technology can be divided into single-user MIMO (SU-MIMO) mode, multi-user MIMO (MU-MIMO) mode, and inter-base-station cooperative MIMO (Multiple Cell MIMO). ) mode.
- SU-MIMO single-user MIMO
- MU-MIMO multi-user MIMO
- Inter-base-station cooperative MIMO Multiple Cell MIMO
- W is the precoding matrix
- s is the pre-transmission signal
- X is the signal that is weighted and sent to the antenna.
- H is the MIMO channel, if H and W are ideally matched, such that:
- the receiver can easily demodulate s.
- the terminal estimates the appropriate W by measuring the MIM0 channel H, and then feeds the sequence number of the W in the code book C to the base station. After obtaining the sequence number, the base station can check the code book C to obtain the weight matrix W that is really needed.
- PMI Precoding Matrix Index
- the terminal needs to feed back the necessary channel information (such as PMI). How to reduce the feedback overhead is a hot topic.
- PMI channel information
- the inventors of the present invention have found that since the processing of the terminal and the base station are different in various MIMO modes, unified PMI feedback cannot be performed. Summary of the invention
- Embodiments of the present invention have been made in view of the above problems of the prior art to overcome one or more disadvantages of the prior art, and at least provide a beneficial alternative.
- the present invention provides the following aspects.
- a communication device having a plurality of antennas which may employ multiple input multiple output techniques, and the communication device includes:
- a multiple input multiple output mode determining unit configured to determine a multiple input multiple output mode to be adopted
- a precoding matrix information determining unit configured to determine a precoding matrix according to the determined multiple input multiple output mode
- a sending unit transmitting information related to the precoding matrix
- the precoding matrix information determining unit determines a precoding matrix to be used when a serving base station of a cell in which the communication device is located communicates with the communication device, and the serving base station and the communication device in the cell A precoding matrix that should be used when communicating with other communication devices.
- the communication device characterized in that, when the multiple input multiple output mode to be used is a multi-base station cooperative multiple input multiple output mode, the precoding matrix information determining unit determines the serving base station and The precoding matrix to be used when the communication device performs communication and the precoding matrix to be used when the neighboring base station of the serving base station communicates with other communication devices in the neighboring cell and the communication device group.
- Aspect 3 The communication device according to aspect 1, characterized in that, when the multiple input multiple output mode to be used is a single cell multi-user multiple input multiple output mode, the precoding matrix information determining unit is configured to cause the communication Determining, by the device, a quality-optimized criterion of a signal obtained from the serving base station, a precoding matrix to be used when the serving base station communicates with the communication device, based on a signal obtained by the communication device from the serving base station The worst quality criteria determine the precoding matrix that should be used by the serving base station to communicate with other communication devices in the cell that are grouped with the communication device.
- Aspect 4 The communication device according to aspect 2, wherein, when the multiple input multiple output mode to be employed is a multi-base station cooperative multiple input multiple output mode, the precoding matrix information determining unit is configured to cause the communication device a quality-optimized criterion of a signal obtained from the serving base station determining a precoding matrix to be used when the serving base station communicates with the communication device, based on a signal obtained by the communication device from the neighboring base station The worst quality criterion determines the precoding matrix that should be used by neighboring base stations to communicate with other communication devices in the neighboring cell that are grouped with the communication device.
- Aspect 5 The communication device according to aspect 1 or 2, wherein, when the multiple input multiple output mode to be used is a single user multiple input multiple output mode, the precoding matrix information determining unit is based on a capacity maximization principle Or minimizing the error rate principle to determine that the serving base station is in communication with the communication device Two or more precoding matrices that should be used in the letter.
- Aspect 6 The communication apparatus according to aspect 1, wherein the information related to the precoding matrix is the precoding matrix itself or a precoding matrix index.
- Aspect 7 The communication device according to aspect 1, wherein the transmitting unit transmits information related to the precoding matrix in various MIMO modes in a unified format.
- a base station, the base station includes:
- a multiple input multiple output mode determining unit configured to determine a multiple input multiple output mode to be employed;
- a notification unit configured to notify the determined terminal of the determined multiple input multiple output mode;
- a receiving unit configured to receive the Information about the precoding matrix of the terminal;
- a terminal grouping unit configured to perform, according to the information about the precoding matrix sent by the terminal, when the determined multiple input multiple output mode is a single cell multiple user multiple input multiple output mode, group.
- the terminal grouping unit comprises: a terminal priority determining unit, a same priority terminal grouping unit, a determining unit, a secondary priority terminal grouping unit, and a second Excellent group unit,
- the terminal priority determining unit determines the priority of the terminal, and the same priority terminal grouping unit determines the terminal grouped with the terminal concerned in the terminal of the same priority, and the determining unit determines whether the group is found.
- the terminal of the sub-priority terminal grouping unit searches for the terminal in the sub-priority terminal when the judging unit judges that the terminal that is not grouped with the terminal of interest is found in the terminal of the same priority.
- the terminal group in which the terminal is concerned, the secondary priority grouping unit performs the sub-optimal grouping when the determining unit determines that the terminal grouped with the terminal of interest is not found in the terminal of the secondary priority.
- a communication method for use in a communication device that accepts a service of a base station comprising: Determine the multiple input multiple output mode that should be used;
- the multiple input multiple output mode to be used is a single cell multiple user multiple input multiple output mode
- determining a precoding matrix to be used when the serving base station of the cell in which the communication device is located communicates with the communication device, and the A precoding matrix to be used by the serving base station when communicating with other communication devices in the cell that are grouped with the communication device.
- a base station, the base station includes:
- a receiving unit configured to receive information about a precoding matrix from another base station
- a terminal grouping unit for performing grouping between the terminals according to the information related to the precoding matrix.
- a multiple input multiple output mode determining unit configured to determine a multiple input multiple output mode to be adopted
- a precoding matrix information determining unit configured to determine a precoding matrix according to the determined multiple input multiple output mode
- a sending unit transmitting information related to the precoding matrix
- the precoding matrix information determining unit determines a plurality of precoding matrices associated with the multiple input multiple output mode determined by the multiple input multiple output mode determining unit, and is determined by the multiple input multiple output mode determining unit. In the multiple input multiple output mode, the transmitting unit transmits the information related to the plurality of precoding matrices in the same message format.
- Aspect 13 The communication device according to aspect 12, wherein, when the multiple input multiple output mode to be used is a single cell multiple user multiple input multiple output mode, the precoding matrix information determining unit determines a precoding matrix to be used when the serving base station of the cell in which the communication device is located communicates with the communication device, and a communication base station to use when communicating with other communication devices in the cell that are grouped with the communication device Precoding matrix.
- Aspect 14 The communication device according to aspect 12, wherein, when the multiple input multiple output mode to be employed is a multi-base station cooperative multiple input multiple output mode, the precoding matrix information determining unit determines the serving base station and the A precoding matrix to be used when the communication device communicates and a precoding matrix to be used when the neighboring base station of the serving base station communicates with other communication devices in the neighboring cell that are grouped with the communication device.
- Aspect 15 The communication device according to aspect 12, wherein the precoding matrix information determining unit is based on a capacity maximization principle or minimizing an error when the multiple input multiple output mode to be employed is a single user multiple input multiple output mode
- the rate principle determines two or more precoding matrices that the serving base station should use when communicating with the communication device.
- a multiple input multiple output mode determining unit configured to determine a multiple input multiple output mode to be adopted
- a precoding matrix information determining unit configured to determine a precoding matrix according to the determined multiple input multiple output mode
- a sending unit transmitting information related to the precoding matrix
- the precoding matrix information determining unit determines a precoding matrix to be used when the serving base station communicates with the communication device, and the A precoding matrix to be used when a neighboring base station of the serving base station communicates with other communication devices in the neighboring cell that are grouped with the communication device.
- unified feedback signaling can be designed, which can simplify the location at the terminal Reason.
- the terminal feeds back multiple (including two) PMI information regardless of the multiple input multiple output mode, so that the base station can more conveniently control the inter-user interference when scheduling multiple users.
- FIG. 1 schematically shows the processing of a communication system in accordance with an embodiment of the present invention in a SU-MIMO mode
- FIG. 2 schematically illustrates processing of a communication system in accordance with an embodiment of the present invention in a MU-MIMO mode
- Figure 3 is a diagrammatic view showing the processing of a communication system in accordance with an embodiment of the present invention in an inter-base station cooperative MIMO mode;
- FIG. 4 is a schematic illustration of the principle of pairing terminals in accordance with an embodiment of the present invention
- FIG. 5 is a view schematically showing an embodiment of a structure of a terminal according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram showing an embodiment of a structure of a base station according to an embodiment of the present invention
- FIG. 7 is a diagram showing another embodiment of the present invention, in which two terminals are paired as an example, a terminal group unit Processing performed;
- FIG. 8 is a schematic structural diagram of a terminal grouping unit 64 of a base station according to the above embodiment.
- FIG. 9 is a diagram showing the structure of a neighboring base station according to an embodiment of the present invention. detailed description
- Fig. 1 schematically shows the processing of a communication system in accordance with an embodiment of the present invention in a SU-MIMO mode.
- a base station transmits multiple signals to a user using the same physical resources.
- the base station needs to perform matrix weighting on the multiple signals when transmitting them.
- the weighting matrix is a code matrix in a codebook known to the base station and the terminal.
- a terminal feeds back two or more PMIs, one for each data stream, in which case the precoding matrix is reduced to a precoding vector.
- the principle of selection may be the principle of capacity maximization or the principle of minimizing the error rate.
- the base station weights the transmitted data stream based on the fed back PMI.
- Fig. 2 schematically shows the processing of a communication system in accordance with an embodiment of the present invention in a MU-MIMO mode.
- a base station transmits signals to multiple users using the same physical resources.
- the base station needs to use the PMI pairing (grouping) method.
- each terminal feeds back two or more PMIs (two PMIs are shown in the figure), wherein one PMI is used by the terminal for feedback, and the other is desired.
- the PMI is for users who are required to pair with the terminal. Although only two terminals are shown in the figure, it should be noted that there may be more terminals.
- the PMI selection can be performed using the following formula:
- H k is the MIMO channel matrix from base station to user k
- w is the codeword in the codebook
- its index in the codebook is abbreviated as PMI
- PMI1 is the largest SNR
- PMI2 is the smallest SNR
- Fig. 4 schematically illustrates the principle of pairing terminals in accordance with an embodiment of the present invention.
- user N feeds back two PMIs, it corresponds to the best SNR and the worst SNR, respectively, the best SNR is the best PMI, and the worst SNR is called the worst PMI.
- PMI1 X
- the worst PMI2 Y
- another user also feeds back two PMIs, preferably PMI 1 is Y, and the worst ⁇ 2 is X, then the two users are just paired, and the user's best ⁇ corresponds to the user. ⁇ The worst, the worst of the user, the best choice for the user.
- the terminal priority can be matched according to the terminal priority, for example, if terminal 1 priority Whether the PMI1 used by the terminal 1 is the PMI 4 required by the terminal 2 is not specified, as shown in FIG. 2. If there are more than two PMIs, the PMIs other than PMI1 are removed. The PMIs that the terminal wants to be grouped with should be used. The terminals in the group can be multi-water.
- Fig. 3 schematically shows the processing of a communication system in accordance with an embodiment of the present invention in an inter-base station cooperative MIMO mode.
- each water-sending terminal feeds back two or more ⁇ , where one ⁇ (for example, PMI1) is a base station (also called a cell base station or a serving base station) of a cell (serving cell) where the terminal wants the terminal to be located.
- ⁇ for example, PMI1
- a precoding matrix used to weight the messages sent to itself.
- Other ⁇ eg ⁇ 2
- the terminal can make a selection according to the following formula:
- H is the MIMO channel matrix from the serving base station to the user k
- H 2 k is the MIMO channel from the neighboring base station to the user k
- w ⁇ nw 2 is the best PMI of the serving base station to the user
- the neighboring base station is The worst PMI for the user.
- the pairing principle is slightly different from the single-cell multi-user MIMO pairing. For example, after the terminal feeds back two PMIs to the cell base station, the cell base station transmits the PMI (for example, PMI2) used by the user to the neighboring cell user to the neighboring base station.
- the neighboring base station finds the user who wants to use PMI2 from its cell, so that this user can be matched with the user of the original cell. If there are more than two PMIs, the PMI other than PMI1 is a set of weighting precoding matrices that the terminal can use when transmitting signals on the same physical resource as the cell in which the terminal is located.
- the base station can adopt the PMI feedback format shown in Table 1 below.
- PMI report1 and PMI report2 are the PMI information required for various MIMO modes.
- PMI reportl and PMI report2 have different meanings for different MIMO modes.
- PMI report1 and PMI report2 are the respective precoding matrices for the two streams sent to the user; for MU-MIMO mode, PMI reportl and PMI report2 are the PMIs used by the users themselves and wish to be paired with them.
- PMI used by the user; for the multi-base station cooperative MIMO mode, PMI report1 and PMI report2 are respectively the PMI used by the user and the PMI used by the user who is expected to be paired with other neighboring cells.
- the terminal can transmit various PMI feedbacks to the base station by using the same feedback format, thereby achieving the purpose of simplifying the feedback signaling overhead.
- the terminal can feed back more than two PMIs for unifying PMI feedback of various MIMO formats. For example, for SU-MIMO mode, more than two PMIs can be used to transmit more users. Precoding weighting of two data streams; for MU-MIMO mode, more than two PMIs can be used to group terminals, and each PMI fed back by the terminal removes the other PMIs other than the first one. PMIs that other terminals of the group should use; for multi-base station cooperative MIMO mode, more than two PMIs can be used to group terminals between cells, and each PMI fed back by the terminal removes other PMIs other than the first PMI. The PMI that the terminal wants other terminals with other cells to use.
- Fig. 5 schematically shows an embodiment of the structure of a terminal according to an embodiment of the present invention.
- the terminal 50 includes a MIMO mode determining unit 51, a PMI determining unit 52, and a feedback unit 53.
- the MIMO mode determining unit 51 is configured to determine a MIMO mode employed by the mobile terminal.
- the MIMO mode determining unit 51 may receive an indication from the base station indicating the MIMO mode and determine the MIMO mode to be employed based on the indication.
- the mode determining unit 51 may determine the MIMO mode that should be adopted according to the channel quality between the cell base station of the cell in which the cell is located, the channel quality between the neighboring base stations, and the like, and notify the cell base station of the determined MIMO mode, and Waiting for confirmation from the base station. In an alternative embodiment, no base station is required for confirmation.
- the PMI determining unit 52 determines the PMI to be fed back based on the determined MIMO mode. Specifically, for the terminal single-user MIMO mode, the PMI determining unit determines the PMI used by two data streams (or multiple data streams if there are more than two PMIs) for a single user. For the MU-MIMO mode and the multi-base station cooperative MIMO mode, the PMI determining unit determines the PMI that the terminal wishes to use, and the PMI that the user who wishes to use with the group.
- the feedback unit 53 is configured to feed back the PMI determined by the PMI determining unit to the cell base station. As described above, the feedback unit 53 can feed back PMI information in various MIMO modes in a unified format.
- FIG. 6 is a view schematically showing an embodiment of a structure of a base station according to an embodiment of the present invention.
- the base station 60 includes a MIMO mode determining unit 61, a notifying unit 62, a receiving unit 63, and a terminal grouping unit 64.
- the MIMO mode determining unit 61 determines the MIMO mode that should be used. Specifically, the MIMO mode that should be taken may be determined according to channel information between the base station and the served terminal, or location information of the terminal, and the like. For example, if the terminal is located in a central area of the service area of the base station, the SU-MIMO mode is adopted, and if the terminal is located in the middle area of the base station, the MU-MIMO mode is adopted, and if located in the edge area of the base station, A multi-base station cooperative MIMO mode is adopted.
- the MIMO mode to be employed may also be determined by the terminal, and a request to request the use of the determined MIMO mode is transmitted to the base station.
- the notifying unit 62 notifies the terminal of the determined MIMO mode. In addition, when the multi-base station cooperative MIMO mode is employed, the notifying unit 62 also notifies the neighboring base station of the PMI information received from the terminal.
- the receiving unit 63 receives PMI information from the terminal. As described above, the received PMI information is transmitted by the terminal in a unified format and has different meanings depending on the MIMO mode. In the MU-MIMO mode, the index of the precoding matrix used by the terminal when the terminal wants to communicate with itself, and the precoding matrix used by the terminal when the terminal wants to communicate with other communication devices of its group index.
- the terminal grouping unit 64 determines the terminals that should be grouped based on the PMI information transmitted by each terminal.
- the terminal grouping unit searches for PMI4 according to PMI1 and PMI2 transmitted by the first terminal, and PMI3 and PMI4 transmitted by the second terminal.
- multiple terminals can be grouped.
- Fig. 7 shows a process performed by a terminal group unit by taking pairing of two terminals as an example in accordance with another embodiment of the present invention.
- the priority of the first terminal is determined (step 701).
- the priority of the terminal can be predetermined according to the service agreement.
- the priority of the terminal can also be determined according to the nature of the data to be transmitted. For example, if data with high real-time requirements, such as video data or voice data, is transmitted between the terminals, it is determined that the terminal has a higher priority, and if the data that is not required for real-time performance is transmitted, such as EMAIL.
- the data determines that the terminal has a lower priority.
- step 702 pairing is performed in the terminal of the same priority, that is, PMI1 and PMI2 transmitted by the first terminal, and PMI3 and PMI4 transmitted by the second terminal of the same priority, and the PMI4 is the same as PMI1.
- the second terminal having the same PMI 3 as the PMI 2 thereby determining the second terminal paired (grouped) with the first terminal.
- step 703 If the paired second terminal is found (step 703, YES), the processing ends. On the other hand, if the paired second terminal is not found (step 703, No), then in step 704, pairing is performed in the terminal of the secondary priority. That is, according to PMI1 and PMI2 transmitted by the first terminal, and PMI3 and PMI4 transmitted by the second terminal of the second priority, the second terminal with the same PMI4 and PMI1 and the same PMI 3 and PMI2 is searched, thereby determining the first The second terminal of the terminal pairing (grouping).
- FIG. 8 is a block diagram showing the structure of the terminal grouping unit 64 of the base station according to the above embodiment.
- the terminal grouping unit includes a terminal priority determining unit 81, a same priority terminal grouping unit 82, a determining unit 83, a secondary priority terminal grouping unit 84, and a sub-optimal grouping unit 85.
- the terminal priority determining unit 81 determines the priority of the terminal, and the priority terminal grouping unit 82 determines the terminal grouped with the terminal of interest among the terminals of the same priority, and the determining unit 83 determines whether the grouped terminal is found.
- the sub-priority terminal grouping unit 84 searches for the terminal grouped with the terminal of interest in the sub-priority terminal.
- the sub-priority grouping unit 85 performs the sub-optimal grouping.
- FIG. 9 is a diagram showing the structure of a neighboring base station according to an embodiment of the present invention.
- a neighboring base station according to the present invention includes a receiving unit 91 and a terminal grouping unit 92.
- the receiving unit 91 receives PMI information from the cell base station described earlier.
- the terminal grouping unit 92 performs the grouping of the terminals, and the processing thereof is the same as the processing of the terminal grouping unit 64, and details are not described herein.
- the base station can better control inter-user interference when scheduling multiple users, thereby improving system throughput.
- the communication system to which the present invention is applicable may be any multiple access system, broadcast/multicast/unicast system, and may be based on any multiple access technology such as OFDMA, CDMA, TDMA, and the like.
- the above apparatus and method of the present invention may be implemented by hardware, or may be implemented 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 a step.
- 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, or the like.
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- Radio Transmission System (AREA)
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10780006A EP2437405A4 (en) | 2009-05-25 | 2010-03-09 | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND BASE STATION |
JP2012507579A JP2012525739A (ja) | 2009-05-25 | 2010-03-09 | 通信装置、通信方法、及び基地局 |
CN2010800194115A CN102415004A (zh) | 2009-05-25 | 2010-03-09 | 通信装置、通信方法和基站 |
US13/285,795 US20120045018A1 (en) | 2009-05-25 | 2011-10-31 | Communication apparatus, communication method and base station |
Applications Claiming Priority (2)
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CN2009101416511A CN101902305B (zh) | 2009-05-25 | 2009-05-25 | 通信装置、通信方法和基站 |
CN200910141651.1 | 2009-05-25 |
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US13/285,795 Continuation US20120045018A1 (en) | 2009-05-25 | 2011-10-31 | Communication apparatus, communication method and base station |
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EP (1) | EP2437405A4 (zh) |
JP (1) | JP2012525739A (zh) |
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JP2015503270A (ja) * | 2011-11-11 | 2015-01-29 | クアルコム,インコーポレイテッド | Mimoマルチフローシステム内でプリコーディング行列を連動して選択するための装置および方法 |
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Also Published As
Publication number | Publication date |
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CN101902305B (zh) | 2013-10-30 |
CN101902305A (zh) | 2010-12-01 |
US20120045018A1 (en) | 2012-02-23 |
JP2012525739A (ja) | 2012-10-22 |
CN102415004A (zh) | 2012-04-11 |
EP2437405A1 (en) | 2012-04-04 |
EP2437405A4 (en) | 2012-10-24 |
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