WO2013087034A1 - 一种干扰协调方法、基站及通信系统 - Google Patents

一种干扰协调方法、基站及通信系统 Download PDF

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Publication number
WO2013087034A1
WO2013087034A1 PCT/CN2012/086724 CN2012086724W WO2013087034A1 WO 2013087034 A1 WO2013087034 A1 WO 2013087034A1 CN 2012086724 W CN2012086724 W CN 2012086724W WO 2013087034 A1 WO2013087034 A1 WO 2013087034A1
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WIPO (PCT)
Prior art keywords
user
base station
channel state
time
state information
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Application number
PCT/CN2012/086724
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English (en)
French (fr)
Inventor
孙静原
周永行
任晓涛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201110420807.7A external-priority patent/CN103167508B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12857912.5A priority Critical patent/EP2677813B1/en
Publication of WO2013087034A1 publication Critical patent/WO2013087034A1/zh
Priority to US14/069,792 priority patent/US9531513B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037Inter-user or inter-terminal allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/143Downlink power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the present application claims to be Chinese patent application filed on December 15, 2011, the Chinese Patent Office, the application number is 201110420807.7, and the invention name is "an interference coordination method, base station and communication system" Priority is hereby incorporated by reference in its entirety.
  • the present invention relates to the field of communications, and in particular, to an interference coordination method, a base station, and a communication system.
  • BACKGROUND In a network topology of a heterogeneous network, an entire network is covered by a plurality of macro node devices, and a plurality of micro nodes are distributed under one macro node device, so that the same time-frequency resource can be covered in all node coverages. Multiplexing provides the gain from cell splitting and resource multiplexing.
  • Embodiments of the present invention provide an interference coordination method, a base station, and a communication system, which are capable of reducing interference caused by a base station or a base station set to users served by other base stations.
  • a receiver configured to acquire first user channel state information on a first time-frequency resource to be interfered with, and obtain second user channel state information on the first time-frequency resource;
  • a processor configured to pair the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user; a transmitter, configured to transmit data to the second user according to the transmit power and a precoding matrix on the first time-frequency resource, and not to send data to the first user on the first time-frequency resource .
  • a communication system comprising:
  • a base station configured to acquire first user channel state information on the first time-frequency resource to be interfered with and a second user channel state information on the first time-frequency resource, and corresponding to the second user obtained by the management device a transmit power and a precoding matrix, transmitting data to the second user on the first time-frequency resource, and not transmitting data to the first user on the first time-frequency resource;
  • the management device is configured to pair the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user.
  • the interference coordination method, the base station, and the communication system provided by the embodiment of the present invention, after acquiring the first user channel state information on the first time-frequency resource to be interfered with coordination and the second user channel state information on the first time-frequency resource And pairing the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user, and on the first time-frequency resource Transmitting data to the second user according to the transmit power and the precoding matrix corresponding to the second user, and not transmitting data to the first user on the first time-frequency resource. Therefore, interference to the first user can be reduced.
  • FIG. 1 is a schematic flowchart 1 of an interference coordination method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an application scenario of an interference coordination method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart 2 of an interference coordination method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram 1 of a base station according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram 2 of a base station according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram 3 of a base station according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the interference coordination method provided by the embodiment of the present invention may also be called a partial spatial multiplexing interference coordination method, as shown in FIG. 1, including:
  • the base station or the base station set acquires first user channel state information on the first time-frequency resource to be interfered with.
  • the first user may be a user terminal or a virtual user or a base station or a node.
  • the first time-frequency resource is a first time-frequency resource that performs interference coordination on the first user by the base station or the base station
  • the first time-frequency resource may be the first one of the predefined first user that performs interference coordination.
  • the time-frequency resource may be obtained by the first base station to obtain the first time-frequency resource corresponding to the interference coordination of the first user, or may be dynamically determined according to the self-processor of the base station or the base station set to obtain the corresponding response of the first user.
  • the first time-frequency resource that interferes with coordination may be obtained by the first base station to obtain the first time-frequency resource corresponding to the interference coordination of the first user, or may be dynamically determined according to the self-processor of the base station or the base station set to obtain the corresponding response of the first user.
  • the first time-frequency resource for interference coordination corresponding to the first user is obtained by negotiating with each of the base stations, and may be the interference coordination between the base station or the base station set and other base stations or the base station set by means of notification or request negotiation.
  • the user terminal served by the micro node is exemplified by the strong interference of the macro node.
  • the user terminal served by the micro node is the first user.
  • the micro node sends a request to the macro node to perform interference coordination on the corresponding proportion of resources.
  • the macro node determines, based on the request information from the plurality of nodes, the resources for interference coordination and which of the remaining nodes to perform interference coordination. Furthermore, the macro node acquires the first time-frequency resource corresponding to the interference coordination corresponding to the first user.
  • the first time-frequency resource in this embodiment may be a predefined first time-frequency resource or determined by a negotiation between the base stations.
  • the first time-frequency resource of this embodiment may be statically or semi-statically determined, or may be dynamically determined.
  • the number of the first users may be one or more.
  • Different time-frequency resources may correspond to different first users and different first users, and the base station or the base station set respectively performs interference coordination on the corresponding time-frequency resources for the corresponding first user.
  • the base station or the base station set Obtaining, by the base station or the base station set, the first user channel state information on the first time-frequency resource to be coordinated by the interference, After the base station or the base station sends the channel state request message to the first user, the first user measures and generates the first user feedback to the base station or the base station set; or the base station or the base station set sends the message to the other base station. After the channel status request message is measured and generated by the first user, the first user feeds back to other base stations, and then is forwarded by other base stations to the base station or base station set for interference coordination; or the first measurement is performed by the base station or the base station set.
  • the uplink channel information of the user is obtained by adjusting the uplink channel information.
  • the first user channel state information is channel state information between the base station and the first user, or first user channel state information between the set of base stations and the first user.
  • the first user channel state information may include a channel matrix composed of channel coefficients of the corresponding channel or a feature vector of the corresponding channel; the first user channel state information may further include channel quality information such as a signal to interference and noise ratio of the channel.
  • the first user channel state information is first user channel state information corresponding to the first time-frequency resource; or the first user channel state information is time domain statistics, frequency domain statistics, or time-frequency domain statistics corresponding to the first time-frequency resource First user channel status information.
  • the base station or the base station set acquires second user channel state information on the first time-frequency resource.
  • the base station or the base station set pairs the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user.
  • the second user may be a user terminal served by the base station or a user terminal served by the base station.
  • the number of the first users is one or more, and the number of the second users is one or more.
  • different time-frequency resources may correspond to the same or different first number of users and the first user, and may correspond to the same or different number of second users and the second user.
  • the scheduling and pairing process is as follows, but is not limited to:
  • the corresponding one or more first users are used as pre-scheduled users.
  • the transmission power of the pre-scheduled user can be set to an arbitrary value, but does not occupy the transmission power of the base station or the base station set on the corresponding radio resource.
  • MU-MIMO Multiple-User Multiple Input Multiple Output
  • ZF Zero-Forcing
  • BD Block Diagonalization
  • Maximum SL R Signal to Leakage and Noise Ratio
  • the second user with the paired maximum PF priority can be selected from all the second users that can be paired to join the pairing combination as the pairing result, and then the pairing result can be further attempted to be paired based on the pairing result. New users, until no further paired users can be added.
  • the power setting for the second user when pairing can be The transmit power of the base station or base station set on the corresponding radio resource is completely allocated or partially allocated to all second users, such as equally distributed to all second users.
  • the power allocated to the second user by the base station or the set of base stations is not limited as long as the base station or the set of base stations is within the maximum transmit power available on the corresponding time-frequency resource.
  • the base station or the base station set transmits data to the second user according to the transmit power and the precoding matrix on the first time-frequency resource, and does not transmit data to the first user on the first time-frequency resource.
  • the main body of the embodiment of the present invention may be a base station or a set of base stations, or may be a node or a set of nodes, or a cell or a set of cells.
  • the scheduling used may be a single cell or a single base station MU-MIMO scheduling.
  • the scheduling used may be a multi-cell or multi-base station JP-MU. - MIMO scheduling. Regardless of the subject of interference coordination, the first user can be interfered with using the method of the present invention, and no limitation is made here.
  • the interference coordination method provided by the embodiment of the present invention, after the base station or the base station set obtains the first user channel state information on the first time-frequency resource to be coordinated and coordinated, and the second user channel state information on the first time-frequency resource, And pairing the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user, and according to the first time-frequency resource
  • the transmit power and the precoding matrix corresponding to the second user transmit data to the second user, and the data is not transmitted to the first user on the first time-frequency resource. Therefore, interference to the first user can be reduced.
  • the interference coordination method provided by the embodiment of the present invention is exemplified by the scenario shown in FIG. 2, and the system in this embodiment includes the first base station 201, the user terminals 202, 205 served by the first base station 201, and the second base station 203.
  • the user terminal 204 served by the second base station 203 uses the second base station 203 as the first user to be interfered, and uses a zero-forcing algorithm as an example for description.
  • the method includes the following steps:
  • the S30K pre-defines the second base station 203 as the first user.
  • step definition process may be implemented by informing the first base station 201 to define the second base station 203 as the first user by negotiation between the first base station 201 and the second base station 203.
  • the first base station 201 acquires a first time-frequency resource of the second base station 203.
  • the first time-frequency resource of the second base station 203 acquired by the first base station 201 may be a predefined first time-frequency resource for performing interference coordination on the second base station 203, or may be the first base station 201 and each After the base station negotiates, the first time-frequency resource for performing interference coordination on the second base station 203 is obtained, and the first base station 201 may dynamically determine the first time-frequency resource for performing interference coordination on the second base station 203 according to the self-processor.
  • First base station 201 and each base station Negotiating the first time-frequency resource for performing interference coordination on the first user, which may be a notification or request between the first base station 201 and other base stations or a set of base stations to determine the first time-frequency resource for performing interference coordination on the second base station 203. .
  • the information transmitted between the base stations includes: information on which channels to perform interference coordination on which resources are negotiated, and may be requests or notifications, including requesting measurement corresponding channel information and resources for performing interference coordination, or notifying Resources for interference coordination.
  • the first base station 201 sends a channel state request message to the second base station 203.
  • the first base station 201 transmits channel state request information to the second base station 203, or transmits channel state request information to the user terminal 204 served by the second base station 203, or does not transmit any channel state request information, but the first base station 201 directly measures the second.
  • Channel state information of the base station 203 It may also be channel state information directly fed back by the second base station 203 or directly forward the channel state information corresponding to the second base station 203 for other base stations.
  • the second base station 203 measures and generates first user channel state information.
  • the first user channel state information is channel state information between the second base station 203 and the first base station 201, and the first user channel state information may include a channel matrix composed of channel coefficients of the corresponding channel or a feature vector of the corresponding channel;
  • the first user channel state information may further include channel quality information such as a signal to interference and noise ratio of the channel.
  • the second base station 203 sends the first user channel state information to the first base station 201.
  • the first base station 201 obtains the first user channel state information on the first time-frequency resource to be interfered with by the method of sending the signal state request message to the second base station 203, and may of course pass
  • the first base station 201 measures uplink channel information of the second base station 203, and the first base station 201 obtains downlink channel state information of the second base station 203 according to the uplink channel information.
  • the transmitted first user channel state information is first user channel state information between the second base station and the first base station.
  • the first user channel state information may be first user channel state information corresponding to the first time-frequency resource between the second base station and the first base station, or may be statistics in the time domain, the frequency domain, or the time-frequency domain. First user channel state information between the second base station and the first base station.
  • the channel state information is the first user channel state information between the first user and the first base station.
  • the first user channel state information may be the first user channel state information corresponding to the first time-frequency resource between the first user and the first base station, or may be the first in the time domain, the frequency domain, or the time-frequency domain.
  • the channel between the base station or the base station and the first user is when the number of the first user is one. Or more than one time may be one or more channels. It is required that when the actual user service for the actual scheduling is satisfied during scheduling, no interference or large interference is generated to these channels.
  • the first user here may also be a node or a base station, or a user served by a node or a user served by a base station.
  • the channel of the first user is a channel of the corresponding cell or node to the first user of the base station or the set of base stations for interference coordination.
  • it may be a predefined channel information, such as a certain subspace or a transmission direction or a precoding matrix corresponding channel, where the first user is a virtual user.
  • the method for obtaining the first user channel state information may be obtained by using the base station or the base station set in this embodiment by measuring a reference signal corresponding to the first user, such as some nodes or some users. And corresponding to the first user, such as some nodes or some users, measuring the reference signal of the base station or the base station set using the method, etc., obtaining channel information, and transmitting the channel information to one or more of the base station or the base station set.
  • the base station may also be a user of the corresponding node to measure the reference signal of the base station or the set of base stations to obtain channel information and feed back to the corresponding node and forward it to the base station or one or several base stations in the set of base stations by the corresponding node. .
  • the interference coordination of the second base station is taken as an example.
  • the embodiment of the present invention may also perform interference coordination on one or several users served by the second base station, and at this time, the base station and the user terminal served by the base station may be defined.
  • the information transmitted between includes information on which channels perform interference coordination on which resources; notifies the user terminal which channel state information is measured, such as measuring which channel information corresponding to the cell and feedback; in the semi-static mode, it is also possible to notify The user terminal feeds back the channel state information corresponding to the serving cell on the resource that performs interference coordination and the resource that does not perform interference coordination.
  • the first base station is configured according to the first user channel state information and the second user channel state information.
  • the 201 pairs the user terminals 202 served by the first base station 201, such as by zero-forcing processing and pre-pairing priority comparison, and allowing pairing when the post-pairing priority is higher than the pre-pairing priority, thereby implementing the second base station 203 and The pairing of the user terminals 202 served by the first base station 201 to obtain the transmission power and the precoding matrix corresponding to the user terminals 202 served by the first base station 201.
  • the zero-forcing processing method adopted by the first base station 201 may specifically be:
  • the channel of the user terminal 202 served by the first base station 201 to the first base station 201 is H1
  • the channel of the user terminal 205 served by the first base station 201 to the first base station 201 is H2;
  • the channel of the second base station 203 to the first base station 201 is Hp;
  • the first base station 201 After the zero-forcing process, the first base station 201 performs the second service when the VI is used for the user terminal 202.
  • the interference of the base station 203 is effectively reduced, that is, HpV10.
  • the user terminal 205 served by the first base station 201 can continue to perform a pairing attempt, such as allowing the user terminal served by the first base station 201.
  • the addition of 205 to the pairing also generates a corresponding transmit power and precoding matrix for the user terminal 205 served by the first base station 201.
  • ZF[H1, H2, Hp] [Vl ' , V2, Vp] , HpVl ' 0 and HpV2 O;
  • the sum of the priorities of the users that the first base station may actually serve is calculated based on the transmit power and the precoding matrix before and after the pairing, and the pairing is allowed when the paired priority is higher than the pre-pairing priority.
  • the pairing attempt can be based on pre-scheduling, try all users who are allowed to pair and select a user that is most suitable for pairing to add to the scheduling result, and then try to pair the new user based on the existing scheduling result until it can not be further added. Pair the user so far.
  • the scheduling and pairing algorithms actually used are not limited to this.
  • the first base station 201 transmits data to the user terminals 202 and 205 served by the first base station 201 according to the transmit power and the precoding matrix on the first time-frequency resource, and does not transmit data to the second base station 203 on the first time-frequency resource. .
  • the first base station 201 transmits data only for the user terminals 202, 205 served by the first base station 201 with the transmit power and precoding matrix, and does not transmit data for the second base station 203.
  • the transmit power is part or all of the maximum transmit power available to the first base station on the first time-frequency resource, that is, the second base station 203 does not occupy the first base station.
  • the transmit power of 201 all available power can be allocated to the user terminal 202 served by the first base station 201,
  • the power of the channel N is the same.
  • step S307 is only an exemplary description of the zero-forcing processing method adopted by the first base station 201, and the same first base station 201 may also adopt the maximum signal leakage noise ratio SLNR processing method, by calculating the maximum or larger SLNR.
  • the precoding matrix corresponding to the first base station 201 is obtained, and the first base station 201 can also obtain the precoding matrix corresponding to the first base station 201 by using a block diagonalization processing method, thereby reducing the precoding matrix of the first base station 201. Interference generated in the direction of the second base station 203.
  • a power reduction processing method is employed to reduce interference of the first base station 201 with the second base station 203.
  • the scheduling performed by the first base station 201 allows multiple users to be served simultaneously on the same resource block.
  • the first user is used as a pre-scheduling result on the corresponding resource, and then, while continuing to try to schedule other users of the base station service, a similar processing method such as zero-forcing processing, block diagonalization processing, maximum signal leakage ratio processing, and the like is used to ensure the The base station does not interfere with the first user or has a lower level when actually serving the user. Interference.
  • the foregoing embodiment is only an exemplary description of the case where the first user is the second base station 203. If the second base station 203 is used as the first user, all the under the second base station 203 can be reduced after being processed. User interference. Similarly, the first user may also define a virtual user corresponding to one or more user terminals or base stations or nodes or subspaces, and the processing method may be the same as the specific embodiment.
  • the first user is the second base station 203 or the user terminal 204 served by the second base station, mainly looking at the object interfered by the first base station 201.
  • the object that the first base station 201 interferes with is one or several users in the second base station 203
  • the user terminal served by the one or several second base stations 203 may be regarded as the first user, if the first base station 201 interferes.
  • the second base station 203 can be regarded as the first user, and when the first user is serving the user terminal 204, the first base station 201 can also be the other base station, such as the first base station 201.
  • the second base station 203 sends a first channel state request message, and the first base station 201 receives the first channel state information measured and generated by the first user forwarded by the other base station.
  • the main body of the embodiment of the present invention may be a base station or a set of base stations, or may be a node or a set of nodes, or a cell or a set of cells.
  • the scheduling used may be a single cell or a single base station MU-MIMO scheduling.
  • the scheduling used may be a multi-cell or a multi-base station JP- MU-MIMO scheduling. Regardless of the subject of interference coordination, the first user can be interfered with using the method of the present invention, and no limitation is made here.
  • An embodiment of the present invention provides an interference coordination method, where a first base station acquires a first time-frequency resource and a first time-frequency of a second base station after transmitting a channel state request message to a predefined first user-second base station.
  • the first user channel state information on the resource and the second user channel state information time-frequency resource of the user terminal served by the first base station, and the user serving the first base station according to the first user channel state information and the second user channel state information
  • the terminal performs scheduling pairing, that is, performing zero-forcing processing on the channels of the second base station and the user terminal served by the first base station, so that the transmission power and the precoding matrix corresponding to the user terminal served by the first base station can be obtained, thereby transmitting power.
  • the precoding matrix transmits data for the user equipment served by the first base station on the first time-frequency resource, and does not transmit data to the second base station, thereby reducing interference caused to the second base station as the first user.
  • the embodiment of the present invention provides a base station 40, as shown in FIG. 4, including:
  • the receiver 41 is configured to obtain first user channel state information on the first time-frequency resource to be interfered with, and obtain second user channel state information on the first time-frequency resource.
  • the processor 42 is configured to pair the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user.
  • the transmitter 43 is configured to transmit data to the second user according to the transmit power and the precoding matrix on the first time-frequency resource, and not transmit data to the first user on the first time-frequency resource.
  • the base station provided by the embodiment of the present invention can obtain the first user channel state information on the first time-frequency resource to be interfered with and the second user channel state information on the first time-frequency resource, according to the first user channel state information. Pairing the first user and the second user with the second user channel state information, and obtaining a transmit power and a precoding matrix corresponding to the second user, and transmitting the second power to the second user according to the transmit power and the precoding matrix on the first time frequency resource. Transmitting data does not transmit data to the first user on the first time-frequency resource, thereby reducing interference caused to the first user.
  • the receiver 41 further includes:
  • the first sending module 411 is configured to send a channel state request message to the first user.
  • the first receiving module 412 is configured to receive, by the first user, the first user channel state information on the first time-frequency resource to be interfered by the first user measurement and generated by the first user;
  • a second sending module 413 configured to send a channel state request message to other base stations
  • the second receiving module 414 is configured to receive, by the other base station, first user channel state information on the first time-frequency resource to be interfered by the first user measurement and generated by the first base station;
  • the measuring unit 415 is configured to measure uplink channel information of the first user, and obtain downlink channel state information of the first user according to the uplink channel information.
  • the processor 42 further includes:
  • the channel processing module 421 is configured to perform a zero-forcing process, a block diagonalization process, or a maximum signal leakage noise ratio process on the channels of the first user and the second user, to obtain a transmit power and a precoding matrix corresponding to the second user.
  • the main body of this embodiment may be a base station or a set of base stations, or may be a node or a set of nodes, or a set of cells or cells.
  • the scheduling used may be a single cell or a single base station MU-MIMO scheduling.
  • the scheduling used may be a multi-cell or multi-base station JP-MU- MIMO scheduling.
  • a communication system provided by the embodiment of the present invention, as shown in FIG. 7, includes:
  • the base station 701 is configured to acquire first user channel state information on the first time-frequency resource to be interfered with and the second user channel state information on the first time-frequency resource, and corresponding to the second user obtained by the management device 702. Transmit power and precoding matrix, transmitting data to the second user on the first time-frequency resource, not on the first time-frequency resource The first user transmits data;
  • the management device 702 is configured to pair the first user and the second user according to the first user channel state information and the second user channel state information, to obtain a transmit power and a precoding matrix corresponding to the second user.
  • the management device after acquiring the first user channel state information on the first time-frequency resource to be interfered with and the second user channel state information on the first time-frequency resource, the management device is configured according to the first User channel state information and second user channel state information, pairing the first user and the second user to obtain a transmit power and a precoding matrix corresponding to the second user, and the base station according to the transmit power on the first time-frequency resource and The precoding matrix transmits data to the second user, and does not transmit data to the first user on the first time-frequency resource. Therefore, the interference to the first user can be reduced.
  • the first user includes a user terminal or a second base station or a virtual user; the second user is a user terminal served by the base station or a user terminal served by the base station; the number of the first users is one or more, and the number of the second users For one or more.
  • the base station 701 is further configured to obtain a first time-frequency resource, or obtain a first time-frequency resource after being negotiated with each base station; or dynamically determine, according to the self-processor, the first time-frequency resource.
  • the base station 701 is further configured to: send a channel state request message to the first user, and receive, by the first user, the first user channel state information on the first time-frequency resource to be interfered by the first user measurement and generated by the first user; or And transmitting a channel state request message to the other base station, and receiving, by the other base station, the first user channel state information on the first time-frequency resource to be interfered by the first user measurement and generated by the first user; or, measuring the uplink channel information of the first user And obtaining downlink channel state information of the first user according to the uplink channel information.
  • the management device 702 is configured to perform zero-forcing processing, block diagonalization processing, or maximum signal leakage noise ratio processing on the channels of the first user and the second user according to the first user channel state information and the second user channel state information. Obtaining a transmit power and a precoding matrix corresponding to the second user.
  • the main body of this embodiment may be a base station or a set of base stations, or may be a node or a set of nodes, or a set of cells or cells.
  • the scheduling used may be single cell or single base station MU-MIM0 scheduling; when the main body of the embodiment is a base station set, the scheduling used may be multi-cell or multi-base station JP-MU- MIM0 scheduling.
  • the first user can be interfered with using the method of the present invention, and no limitation is made here.

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Abstract

本发明实施例提供一种干扰协调方法、基站及通信系统,涉及通信领域,能够减小基站或基站集合对其他基站服务的用户造成的干扰。其方法包括:获取待干扰协调的第一时频资源上的第一用户信道状态信息;获取所述第一时频资源上的第二用户信道状态信息;根据所述第一用户信道状态信息和所述第二用户信道状态信息,对第一用户和第二用户进行配对,得到所述第二用户对应的发射功率和预编码矩阵;在所述第一时频资源上按照所述发射功率及预编码矩阵向所述第二用户发射数据,在所述第一时频资源上不向所述第一用户发射数据。

Description

一种干扰协调方法、 基站及通信系统 本申请要求于 2011年 12月 15 日提交中国专利局、 申请号为 201110420807.7、 发 明名称为 "一种干扰协调方法、 基站及通信系统"的中国专利申请的优先权, 其全部内 容通过引用结合在本申请中。 技术领域 本发明涉及通信领域, 尤其涉及一种干扰协调方法、 基站及通信系统。 背景技术 在异构网络的网络拓扑结构中, 整个网络由多个宏节点设备所覆盖, 一个宏节点设 备下分布有多个微节点, 这样相同的时频资源能够在所有的节点覆盖范围内被复用, 从 而提供了小区分裂和资源复用带来的增益。 然而, 节点之间的相互干扰会给用户终端带 来较强的干扰, 尤其因宏节点设备的发射功率较大而对微节点用户产生较强的干扰, 即 一个宏节点设备会同时干扰多个微节点对应的用户的数据信道。 发明内容
本发明的实施例提供一种干扰协调方法、 基站及通信系统, 能够减小基站或基站集 合对其他基站服务的的用户造成的干扰。
为达到上述目的, 本发明的实施例采用如下技术方案:
获取待干扰协调的第一时频资源上的第一用户信道状态信息;
获取所述第一时频资源上的第二用户信道状态信息;
根据所述第一用户信道状态信息和所述第二用户信道状态信息,对第一用户和第二 用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵;
在所述第一时频资源上按照所述发射功率及预编码矩阵向所述第二用户发射数据, 在所述第一时频资源上不向所述第一用户发射数据。
—方面, 提供一种基站, 包括:
接收器, 用于获取待干扰协调的第一时频资源上的第一用户信道状态信息, 及获取 所述第一时频资源上的第二用户信道状态信息;
处理器, 用于根据所述第一用户信道状态信息和所述第二用户信道状态信息, 对第 一用户和第二用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵; 发送器,用于在所述第一时频资源上按照所述发射功率及预编码矩阵向所述第二用 户发射数据, 在所述第一时频资源上不向所述第一用户发射数据。
一方面, 提供一种通信系统, 包括:
基站,用于获取待干扰协调的第一时频资源上的第一用户信道状态信息以及所述第 —时频资源上的第二用户信道状态信息, 并根据管理设备得到的第二用户对应的发射功 率和预编码矩阵, 在所述第一时频资源上向所述第二用户发射数据, 在所述第一时频资 源上不向所述第一用户发射数据;
管理设备, 用于根据所述第一用户信道状态信息和所述第二用户信道状态信息, 对 第一用户和第二用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵。
本发明实施例提供的干扰协调方法、 基站及通信系统, 通过在获取待干扰协调的第 一时频资源上的第一用户信道状态信息以及第一时频资源上的第二用户信道状态信息 后, 根据第一用户信道状态信息和第二用户信道状态信息, 对第一用户和第二用户进行 配对, 从而得到第二用户对应的发射功率和预编码矩阵, 并在该第一时频资源上按照第 二用户对应的发射功率及预编码矩阵向第二用户发射数据, 且在第一时频资源上不向所 述第一用户发射数据。 因此, 可以降低对第一用户造成的干扰。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施例或现有 技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还 可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的干扰协调方法流程示意图一;
图 2为本发明实施例提供的干扰协调方法应用场景示意图;
图 3为本发明实施例提供的干扰协调方法流程示意图二;
图 4为本发明实施例提供的基站结构示意图一;
图 5为本发明实施例提供的基站结构示意图二;
图 6为本发明实施例提供的基站结构示意图三;
图 7为本发明实施例提供的通信系统的构造示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整 地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基 于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有 其他实施例, 都属于本发明保护的范围。
本发明实施例提供的干扰协调方法, 也可以叫做部分空间复用的干扰协调方法, 如 图 1所示, 包括:
S101、 基站或基站集合获取待干扰协调的第一时频资源上的第一用户信道状态信 息。
在此, 第一用户可以为用户终端或虚拟用户或基站或节点。
示例性的,第一时频资源为基站或基站集合对第一用户进行干扰协调的第一时频资 源, 该第一时频资源可以是预定义的第一用户对应的进行干扰协调的第一时频资源, 也 可以是与各个基站协商后得到第一用户对应的进行干扰协调的第一时频资源,还可以是 根据基站或基站集合的自身处理器动态确定以得到第一用户对应的进行干扰协调的第 一时频资源。
同时, 与各个基站协商得到第一用户对应的进行干扰协调的第一时频资源, 可以是 基站或基站集合与其他基站或基站集合之间通过通知或请求的方式协商得到的进行干 扰协调的第一时频资源。 以微节点服务的用户终端受到宏节点的强干扰进行举例说明, 这时, 微节点服务的用户终端即为第一用户。 首先, 微节点确定受到对应宏节点强干扰 的用户终端的比例后, 向宏节点发送请求以在对应比例的资源上进行干扰协调。 其次, 宏节点根据来自多个节点的请求信息,确定进行干扰协调的资源和分别在哪些资源上对 哪些微节点进行干扰协调。 进而, 宏节点获取第一用户对应的进行干扰协调的第一时频 资源。
本实施例的第一时频资源, 可以是预定义的第一时频资源, 或者是基站之间通过协 商确定的。 本实施例的第一时频资源, 可以是静态或半静态确定的, 还可以是动态确定 的。
其中, 第一用户的数量可以为一个或多个。 不同的时频资源可以对应不同的第一用 户数量和不同的第一用户,基站或基站集合分别在对应时频资源上针对对应的第一用户 进行干扰协调。
基站或基站集合获取待干扰协调的第一时频资源上的第一用户信道状态信息可以 是, 基站或基站集合向第一用户发送信道状态请求消息后, 由第一用户测量并生成的, 第一用户反馈给基站或基站集合所得到的; 或者, 基站或基站集合通过向其他基站发送 信道状态请求消息后, 由第一用户测量并生成, 第一用户反馈给其他基站, 再由其他基 站转发给进行干扰协调的基站或基站集合所得到的; 或是通过基站或基站集合测量第一 用户的上行信道信息, 并通过对上行信道信息进行调整来得到的。
该第一用户信道状态信息为基站与第一用户之间的信道状态信息, 或基站集合与第 一用户之间的第一用户信道状态信息。该第一用户信道状态信息可以包括对应信道的信 道系数组成的信道矩阵或对应信道的特征向量; 该第一用户信道状态信息还可以包括信 道的信干噪比等信道质量信息。该第一用户信道状态信息为第一时频资源对应的第一用 户信道状态信息; 或者, 第一用户信道状态信息为第一时频资源对应的时域统计、 频域 统计或时频域统计的第一用户信道状态信息。
5102、 基站或基站集合获取第一时频资源上的第二用户信道状态信息。
5103、基站或基站集合根据第一用户信道状态信息和第二用户信道状态信息, 对第 一用户和第二用户进行配对, 得到第二用户对应的发射功率和预编码矩阵。
在此, 该第二用户可以为基站服务的用户终端或基站集合服务的用户终端, 第一用 户的数量为一个或多个, 第二用户的数量为一个或多个。 并且, 不同的时频资源可以对 应相同或不同的第一用户数量和第一用户,可以对应相同或不同的第二用户数量和第二 用户。
调度和配对过程举例如下, 但不限于此:
将对应的一个或多个第一用户作为预调度的用户。可以设定预调度用户的传输功率 为任意值, 但不占用基站或基站集合在对应无线资源上的发射功率。
在预调度的基础上, 使用 MU-MIMO (Multiple-User Multiple Input Multiple Output, 多用户多入多出) 的方式进一步调度基站或基站集合服务的其他用户, 这里叫做第二用 户。通过 ZF(Zero Forcing,迫零) /BD(Block Diagonalization, ±夬对角化)/最大 SL R(Signal to Leakage and Noise Ratio, 信号泄露噪声比)等方法来对尝试调度的第二用户和第一用 户之间进行配对。 如使用 PF (Proportional Fairness, 比例公平) 算法, 那么当尝试增加 新的用户进入配对时当配对后的 PF优先级和大于配对前时, 则认为可以进行配对。, 此 时可以再从所有可以进行配对的第二用户中选择具有配对后最大 PF优先级的第二用户 加入到配对组合中作为配对结果,然后还可以在此配对结果的基础上进一步进行尝试配 对新的用户, 直到不能进一步添加配对用户为止。 配对时对第二用户的功率设置可以为 将基站或基站集合在对应无线资源上的发射功率完全分配或部分分配给所有第二用户, 如平均分配给所有第二用户。这里基站或基站集合分配给第二用户的发射功率只要是基 站或基站集合在对应时频资源上可用的最大发射功率以内即可, 具体分配的功率在此不 做限定。
S104、基站或基站集合在第一时频资源上按照所述发射功率及预编码矩阵向所述第 二用户发射数据, 在第一时频资源上不向第一用户发射数据。
本发明实施例的主体可以为基站或基站集合, 还可以是节点或节点集合, 或者小区 或小区集合。 当本实施例的主体为基站时, 使用的调度可以为单小区或单基站 MU-MIMO调度; 当本发明实施例的主体为基站集合时, 使用的调度可以为多小区或多 基站 JP-MU-MIMO调度。 无论进行干扰协调的主体是什么, 都可以使用本发明的方法 对第一用户进行干扰协调, 这里不做限制。
本发明实施例提供的干扰协调方法,基站或基站集合通过在获取待干扰协调的第一 时频资源上的第一用户信道状态信息以及第一时频资源上的第二用户信道状态信息后, 根据第一用户信道状态信息和第二用户信道状态信息, 对第一用户和第二用户进行配 对, 从而得到第二用户对应的发射功率和预编码矩阵, 并在该第一时频资源上按照第二 用户对应的发射功率及预编码矩阵向第二用户发射数据, 且在第一时频资源上不向所述 第一用户发射数据。 因此, 可以降低对第一用户造成的干扰。
本发明又一实施例提供的干扰协调方法, 以图 2所示场景为例, 假设本实施例系统 中包括第一基站 201、 第一基站 201服务的用户终端 202、 205、 第二基站 203, 第二基 站 203服务的用户终端 204, 以第二基站 203为被干扰的第一用户, 并采用迫零算法为 例进行说明。
如图 3所示, 该方法包括以下步骤:
S30K 预先定义第二基站 203作为第一用户。
需要说明的是,本步骤定义过程可以通过第一基站 201和第二基站 203之间的协商, 告知第一基站 201将第二基站 203定义为第一用户来实现。
S302、 第一基站 201获取第二基站 203的第一时频资源。
示例性的, 第一基站 201获取的第二基站 203的第一时频资源可以是, 预定义的对 第二基站 203进行干扰协调的第一时频资源, 也可以是第一基站 201与各个基站协商后 得到对第二基站 203进行干扰协调的第一时频资源,还可以是第一基站 201根据自身处 理器动态确定对第二基站 203进行干扰协调的第一时频资源。第一基站 201与各个基站 协商得到对第一用户进行干扰协调的第一时频资源,可以是第一基站 201与其他基站或 基站集合之间通知或请求来确定进行对第二基站 203进行干扰协调的第一时频资源。
需要说明的是, 基站之间传输的信息包括: 协商的在哪些资源上进行哪些信道的干 扰协调的信息, 可以是请求或通知, 包括请求测量对应的信道信息以及进行干扰协调的 资源, 或者通知进行干扰协调的资源。
5303、 第一基站 201向第二基站 203发送信道状态请求消息。
第一基站 201向第二基站 203发送信道状态请求信息, 或者向第二基站 203服务的 用户终端 204发送信道状态请求信息, 或者不发送任何信道状态请求信息而是第一基站 201直接测量第二基站 203的信道状态信息。 还可以是第二基站 203直接反馈的信道状 态信息或为其他基站直接转发第二基站 203对应的信道状态信息。
5304、 第二基站 203测量并生成第一用户信道状态信息。
该第一用户信道状态信息为第二基站 203与第一基站 201之间的信道状态信息, 该 第一用户信道状态信息可以包括对应信道的信道系数组成的信道矩阵或对应信道的特 征向量; 该第一用户信道状态信息还可以包括信道的信干噪比等信道质量信息。
S305、 第二基站 203向第一基站 201发送第一用户信道状态信息。
这里, 只是示例性的说明第一基站 201是通过向第二基站 203发送信号状态请求消 息的方法来获取待干扰协调的第一时频资源上的第一用户信道状态信息的, 当然也可以 通过第一基站 201测量第二基站 203的上行信道信息,第一基站 201根据该上行信道信 息得到第二基站 203的下行信道状态信息。
发送的第一用户信道状态信息为第二基站与第一基站之间的第一用户信道状态信 息。
同时, 该第一用户信道状态信息可以为第二基站与第一基站之间的第一时频资源对 应的第一用户信道状态信息, 也可以为在时域、 频域或时频域统计的第二基站与第一基 站之间的第一用户信道状态信息。
当然, 无论第一用户为哪一种用户, 如虚拟用户、 节点、 基站或节点服务的用户, 信道状态信息都是第一用户与第一基站之间的第一用户信道状态信息。 同时, 第一用户 信道状态信息可以为第一用户与第一基站之间的第一时频资源对应的第一用户信道状 态信息, 也可以为在时域、 频域或时频域统计的第一用户与第一基站之间的第一用户信 道状态信息。
需要补充的是, 基站或基站集合与第一用户之间的信道, 当第一用户的个数为一个 或多个时可以是一个或多个信道。要求在调度时满足为实际调度的真实用户服务时不会 对这些信道产生干扰或产生较大的干扰。 这里的第一用户也可以是节点或基站, 或者节 点服务的用户或基站服务的用户。而第一用户的信道是基站或基站集合进行干扰协调的 对应的小区或节点到第一用户的信道。 此外, 还可以是预定义的信道信息, 如一定子空 间或传输方向或预编码矩阵对应信道, 此时的第一用户为虚拟用户。 并且, 获取第一用 户信道状态信息的方法可以有很多种,可以是通过使用本实施例中的的基站或基站集合 通过测量对应第一用户如某些节点或某些用户的参考信号等来得到, 也可以是对应第一 用户如某些节点或某些用户测量使用本方法的基站或基站集合的参考信号等得到信道 信息并将信道信息发送给所述基站或基站集合中的某一个或几个基站,还可以是对应节 点服务的用户测量所述基站或基站集合的参考信号等得到信道信息并反馈给对应节点 并由对应节点转发给所述基站或基站集合中的某一个或几个基站。
本实施例中以对第二基站进行干扰协调为例进行说明,本发明实施例还可以对第二 基站服务的某一个或几个用户进行干扰协调,此时可以定义基站和基站服务的用户终端 之间传输的信息包括: 在哪些资源上进行哪些信道的干扰协调的信息; 通知用户终端测 量哪些信道状态信息, 如测量哪一个小区对应的信道信息并反馈; 在半静态模式下, 还 可以通知用户终端分别对进行干扰协调的资源以及未进行干扰协调的资源上的服务小 区对应的信道状态信息并反馈。
S306、获取第一时频资源上的第一基站 201服务的用户终端 202第二用户信道状态 信息。
S307、 根据所述第一用户信道状态信息和所述第二用户信道状态信息, 第一基站
201对第一基站 201服务的用户终端 202进行配对, 如通过迫零处理和配对前后优先级 比较, 当配对后优先级高于配对前优先级时允许配对, 从而可以实现对第二基站 203和 第一基站 201服务的用户终端 202的配对, 以得到第一基站 201服务的用户终端 202对 应的发射功率和预编码矩阵。
第一基站 201采用的迫零处理方法具体可以为:
设:第一基站 201服务的用户终端 202到第一基站 201的信道为 Hl,第一基站 201 服务的用户终端 205到第一基站 201的信道为 H2;
设: 第二基站 203到第一基站 201的信道为 Hp ;
进行迫零处理: ZF[H1, Hp]=[Vl , Vp] ;
经过迫零处理后, 第一基站 201在使用 VI为用户终端 202、 进行服务时, 对第二 基站 203的干扰就会有效降低, 即 HpVl 0。
在第二基站和第一基站 201服务的用户终端 202配对的基础上, 同样的方式, 可以 继续对第一基站 201服务的用户终端 205进行配对尝试, 如允许将第一基站 201服务的 用户终端 205加入到配对则也生成对第一基站 201服务的用户终端 205的对应发射功率 和预编码矩阵。 ZF[H1, H2, Hp]=[Vl ' , V2, Vp] , HpVl ' 0及 HpV2 O;
根据配对前后的发射功率和预编码矩阵来计算第一基站实际可能服务的用户的优 先级的和, 当配对后的优先级高于配对前的优先级时则允许配对。 配对尝试可以在预调 度的基础上, 尝试所有允许配对的用户并选择一个最适合配对的用户添加到调度结果 中, 然后在已有的调度结果基础上再尝试配对新的用户, 直到不能进一步添加配对用户 为止。 实际使用的调度和配对算法并不限于此。
S308、 第一基站 201 在第一时频资源上按照发射功率及预编码矩阵为第一基站 201服务的用户终端 202、 205发射数据, 在第一时频资源上不向第二基站 203发射数 据。
这里, 第一基站 201以该发射功率及预编码矩阵只为第一基站 201服务的用户终 端 202、 205发射数据, 且不为第二基站 203发射数据。 该发射功率为第一基站在该 第一时频资源上可用最大发射功率的部分或全部, 即第二基站 203不会占用第一基站
201 的发射功率, 所有的可用功率都可以分配给第一基站 201服务的用户终端 202、
205来进行调度和数据传输处理。 在处理器进行配对过程中, 第二基站 203的信道功 率信息可以设定为任何值, 如设定为第二基站 203对应的秩 rank=N的信道的功率与 实际服务用户对应的秩 rank=N 的信道的功率相同。 同样的, 根据调度结果, 以该发 射功率及预编码矩阵为第一基站 201服务的用户终端 202、 205发射数据, 并不为第 二基站 203进行任何传输数据的处理。
需要说明的是, 上述步骤 S307只是示例性的说明了第一基站 201采用的迫零处理 方法, 同样的第一基站 201也可以采用最大信号泄露噪声比 SLNR处理方法, 通过计算 最大或较大 SLNR求取第一基站 201对应的预编码矩阵,第一基站 201还可以通过块对 角化的处理方法来求取第一基站 201对应的预编码矩阵, 从而减小第一基站 201的预编 码矩阵在第二基站 203方向上产生的干扰。 或者, 采用降功率处理方法, 以减小第一基 站 201对第二基站 203的干扰。 并且, 第一基站 201进行的调度允许在同一个资源块上 同时为多个用户服务。 将第一用户作为对应资源上的预调度结果, 然后在继续尝试调度 基站服务的其他用户的同时, 使用迫零处理、 块对角化处理、 最大信号泄露比处理等类 似的处理方式来保证所述基站在实际服务用户时不会对第一用户产生干扰或产生较低 的干扰。
上述实施例仅是示例性的对第一用户为第二基站 203的情况进行了描述,若以第二 基站 203作为第一用户,经处理后可以减少对该第二基站 203之下的所有的用户的干扰。 同样的,第一用户也可以为某一个或多个用户终端或基站或节点或子空间对应的虚拟用 户, 定义可以根据具体环境具体设定, 其处理方法与本实施例相同。
此处, 定义第一用户是第二基站 203还是第二基站服务的用户终端 204, 主要是看 第一基站 201干扰的对象。如果第一基站 201干扰的对象是第二基站 203内的一个或几 个用户, 则可以把该一个或几个第二基站 203服务的用户终端当作第一用户, 如果第一 基站 201干扰的对象是第二基站 203内的所有用户, 则可以把第二基站 203当作第一用 户, 而当第一用户为用户终端 204服务时, 还可以是通过第一基站 201向其他基站, 如 第二基站 203发送第一信道状态请求消息,第一基站 201接收其他基站转发的第一用户 测量并生成的第一信道状态信息。
本发明实施例的主体可以为基站或基站集合, 还可以是节点或节点集合, 或者小区 或小区集合。 当本发明实施例的主体为基站时, 使用的调度可以为单小区或单基站 MU-MIMO调度; 当本发明实施例的主体为基站集合时, 使用的调度可以为多小区或多 基站 JP-MU-MIMO调度。 无论进行干扰协调的主体是什么, 都可以使用本发明的方法 对第一用户进行干扰协调, 这里不做限制。
本发明实施例提供一种干扰协调方法,第一基站在向预先定义的第一用户——第二 基站, 发送信道状态请求消息后, 获取第二基站的第一时频资源、 第一时频资源上的第 一用户信道状态信息以及第一基站服务的用户终端的第二用户信道状态信息时频资源, 根据第一用户信道状态信息和第二用户信道状态信息,对第一基站服务的用户终端进行 调度配对, 即对第二基站和第一基站服务的用户终端的信道进行迫零处理, 这样, 就能 得到第一基站服务的用户终端对应的发射功率和预编码矩阵, 以此发射功率及预编码矩 阵在第一时频资源上为第一基站服务的用户终端发射数据, 且不向第二基站发射数据, 从而, 可以降低对作为第一用户的第二基站造成的干扰。
本发明实施例提供一种基站 40, 如图 4所示, 包括:
接收器 41,用于获取待干扰协调的第一时频资源上的第一用户信道状态信息,及获 取第一时频资源上的第二用户信道状态信息。
处理器 42,用于根据第一用户信道状态信息和第二用户信道状态信息,对第一用户 和第二用户进行配对, 得到第二用户对应的发射功率和预编码矩阵。 发送器 43, 用于在第一时频资源上按照发射功率及预编码矩阵向第二用户发射数 据, 在第一时频资源上不向第一用户发射数据。
本发明实施例提供的基站, 能够通过获取待干扰协调的第一时频资源上的第一用户 信道状态信息以及第一时频资源上的第二用户信道状态信息,根据第一用户信道状态信 息和第二用户信道状态信息, 对第一用户和第二用户进行配对, 得到第二用户对应的发 射功率和预编码矩阵,在第一时频资源上按照发射功率及预编码矩阵向第二用户发射数 据,在第一时频资源上不向第一用户发射数据,从而,可以降低对第一用户造成的干扰。
进一步地, 如图 5所示, 接收器 41还包括:
第一发送模块 411, 用于向第一用户发送信道状态请求消息;
第一接收模块 412, 用于接收第一用户反馈的第一用户测量并生成的待干扰协调的 第一时频资源上的第一用户信道状态信息;
和 /或,
第二发送模块 413, 用于向其他基站发送信道状态请求消息;
第二接收模块 414, 用于接收其他基站转发的第一用户测量并生成的待干扰协调的 第一时频资源上的第一用户信道状态信息;
和 /或,
测量单元 415, 用于测量第一用户的上行信道信息, 根据上行信道信息得到第一用 户的下行信道状态信息。
进一步地, 如图 6所示, 处理器 42还包括:
信道处理模块 421, 用于对第一用户和第二用户的信道进行迫零处理、 块对角化处 理或者最大信号泄露噪声比处理, 得到第二用户对应的发射功率和预编码矩阵。
本实施例的主体可以为基站或基站集合, 还可以是节点或节点集合, 或者小区或小 区集合。当本实施例的主体为基站时,使用的调度可以为单小区或单基站 MU-MIMO调 度; 当本实施例的主体为基站集合时,使用的调度可以为多小区或多基站 JP-MU-MIMO 调度。 无论进行干扰协调的主体是什么, 都可以使用本发明的方法对第一用户进行干扰 协调, 这里不做限制。
本发明实施例提供的一种通信系统, 如图 7所示, 包括:
基站 701, 用于获取待干扰协调的第一时频资源上的第一用户信道状态信息以及第 一时频资源上的第二用户信道状态信息, 并根据管理设备 702得到的第二用户对应的发 射功率和预编码矩阵, 在第一时频资源上向第二用户发射数据, 在第一时频资源上不向 第一用户发射数据;
管理设备 702, 用于根据第一用户信道状态信息和第二用户信道状态信息, 对第一 用户和第二用户进行配对, 得到第二用户对应的发射功率和预编码矩阵。
本发明实施例提供的通信系统,基站在获取待干扰协调的第一时频资源上的第一用 户信道状态信息及第一时频资源上的第二用户信道状态信息后, 管理设备根据第一用户 信道状态信息和第二用户信道状态信息, 对第一用户和第二用户进行配对, 得到第二用 户对应的发射功率和预编码矩阵, 并且基站在第一时频资源上按照该发射功率及预编码 矩阵向第二用户发射数据, 在第一时频资源上不向第一用户发射数据。 因此, 可以降低 对第一用户造成的干扰。
进一步地, 第一用户包括用户终端或第二基站或虚拟用户; 第二用户为基站服务的 用户终端或基站集合服务的用户终端; 第一用户的数量为一个或多个, 第二用户的数量 为一个或多个。
进一步地, 基站 701还用于获取预定义的第一时频资源; 或者, 与各个基站协商后 得到第一时频资源; 或者, 根据自身处理器动态确定以得到第一时频资源。
进一步地, 基站 701还用于向第一用户发送信道状态请求消息, 接收第一用户反馈 的第一用户测量并生成的待干扰协调的第一时频资源上的第一用户信道状态信息; 或 者, 向其他基站发送信道状态请求消息, 接收其他基站转发的第一用户测量并生成的待 干扰协调的第一时频资源上的第一用户信道状态信息; 或者, 测量第一用户的上行信道 信息, 根据上行信道信息得到第一用户的下行信道状态信息。
进一步地,管理设备 702用于根据第一用户信道状态信息和第二用户信道状态信息, 对第一用户和第二用户的信道进行迫零处理、块对角化处理或者最大信号泄露噪声比处 理, 得到第二用户对应的发射功率和预编码矩阵。
本实施例的主体可以为基站或基站集合, 还可以是节点或节点集合, 或者小区或小 区集合。当本实施例的主体为基站时,使用的调度可以为单小区或单基站 MU-MIM0调 度; 当本实施例的主体为基站集合时,使用的调度可以为多小区或多基站 JP-MU-MIM0 调度。 无论进行干扰协调的主体是什么, 都可以使用本发明的方法对第一用户进行干扰 协调, 这里不做限制。
在本申请所提供的几个实施例中, 应该理解到在本申请所提供的几个实施例中, 应 该理解到, 所揭露的装置、 方法和系统, 可以通过其它的方式实现。 例如, 以上所描述 的装置实施例仅仅是示意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实 际实现时可以有另外的划分方式,例如多个单元或模块可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤可以通过程 序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读取存储介质中, 该程序 在执行时, 执行包括上述方法实施例的步骤; 而前述的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限于此, 任何 熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或替换, 都应 涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应以所述权利要求的保护范围 为准。

Claims

1、 一种干扰协调方法, 其特征在于, 包括:
获取待干扰协调的第一时频资源上的第一用户信道状态信息;
获取所述第一时频资源上的第二用户信道状态信息;
根据所述第一用户信道状态信息和所述第二用户信道状态信息,对第一用户和第二 用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵;
在所述第一时频资源上按照所述发射功率及预编码矩阵向所述第二用户发射数据, 在所述第一时频资源上不向所述第一用户发射数据。
2、 根据权利要求 1所述的方法, 其特征在于,
所述第一用户为用户终端或基站或节点或虚拟用户;
所述第二用户为基站服务的用户终端或基站集合服务的用户终端;
所述第一用户的数量为一个或多个, 所述第二用户的数量为一个或多个。
3、 根据权利要求 1所述的方法, 其特征在于, 所述第一时频资源的获取方式包括: 获取预定义的第一时频资源; 或者, 与各个基站协商后得到第一时频资源; 或者, 根据自身处理器动态确定以得到第一时频资源。
4、 根据权利要求 1所述的方法, 其特征在于, 获取待干扰协调的第一时频资源上 的第一用户信道状态信息包括:
向所述第一用户发送信道状态请求消息,接收所述第一用户反馈的所述第一用户测 量并生成的待干扰协调的第一时频资源上的第一用户信道状态信息;
或者, 向其他基站发送信道状态请求消息, 接收所述其他基站转发的所述第一用户 测量并生成的待干扰协调的第一时频资源上的第一用户信道状态信息;
或者, 测量所述第一用户的上行信道信息, 根据所述上行信道信息得到所述第一用 户的下行信道状态信息。
5、 根据权利要求 4所述的方法, 其特征在于, 所述第一用户信道状态信息包括信 道系数组成的信道矩阵或信道的特征向量。
6、 根据权利要求 5所述的方法, 其特征在于, 所述第一用户信道状态信息还包括 信道的信干噪比。
7、 根据权利要求 6所述的方法, 其特征在于, 所述第一用户信道状态信息为所述 第一时频资源对应的第一用户信道状态信息; 或者, 所述第一用户信道状态信息为在时域统计、 频域统计或时频域统计的第一用 户信道状态信息。
8、 根据权利要求 1所述的方法, 其特征在于, 对第一用户和第二用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵包括:
对所述第一用户和第二用户的信道进行迫零处理、块对角化处理或者最大信号泄露 噪声比处理, 得到所述第二用户对应的发射功率和预编码矩阵。
9、 根据权利要求 1所述的方法, 其特征在于, 所述发射功率为所述基站在所述第 一时频资源上可用最大发射功率的部分或全部。
10、 一种基站, 其特征在于, 包括:
接收器, 用于获取待干扰协调的第一时频资源上的第一用户信道状态信息, 及获取 所述第一时频资源上的第二用户信道状态信息;
处理器, 用于根据所述第一用户信道状态信息和所述第二用户信道状态信息, 对第 一用户和第二用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵;
发送器,用于在所述第一时频资源上按照所述发射功率及预编码矩阵向所述第二用 户发射数据, 在所述第一时频资源上不向所述第一用户发射数据。
11、 根据权利要求 10所述的基站, 其特征在于, 所述处理器还用于动态确定以得 到第一时频资源。
12、 根据权利要求 10所述的基站, 其特征在于, 所述接收器包括:
第一发送模块, 用于向所述第一用户发送信道状态请求消息;
第一接收模块,用于接收所述第一用户反馈的所述第一用户测量并生成的待干扰协 调的第一时频资源上的第一用户信道状态信息;
和 /或,
第二发送模块, 用于向其他基站发送信道状态请求消息;
第二接收模块,用于接收所述其他基站转发的所述第一用户测量并生成的待干扰协 调的第一时频资源上的第一用户信道状态信息;
和 /或,
测量单元, 用于测量所述第一用户的上行信道信息, 根据所述上行信道信息得到所 述第一用户的下行信道状态信息。
13、 根据权利要求 10所述的基站, 其特征在于, 所述处理器包括:
信道处理模块, 用于对所述第一用户和第二用户的信道进行迫零处理、 块对角化处 理或者最大信号泄露噪声比处理, 得到所述第二用户对应的发射功率和预编码矩阵。
14、 一种通信系统, 其特征在于, 包括:
基站,用于获取待干扰协调的第一时频资源上的第一用户信道状态信息以及所述第 一时频资源上的第二用户信道状态信息, 并根据管理设备得到的第二用户对应的发射功 率和预编码矩阵, 在所述第一时频资源上向所述第二用户发射数据, 在所述第一时频资 源上不向所述第一用户发射数据;
管理设备, 用于根据所述第一用户信道状态信息和所述第二用户信道状态信息, 对 第一用户和第二用户进行配对, 得到所述第二用户对应的发射功率和预编码矩阵。
15、 根据权利要求 14所述的通信系统, 其特征在于,
所述第一用户包括用户终端或第二基站或虚拟用户;
所述第二用户为基站服务的用户终端或基站集合服务的用户终端;
所述第一用户的数量为一个或多个, 所述第二用户的数量为一个或多个。
16、 根据权利要求 14所述的通信系统, 其特征在于, 所述基站还用于获取预定义 的第一时频资源; 或者, 与各个基站协商后得到第一时频资源; 或者, 根据自身处理器 动态确定以得到第一时频资源。
17、 根据权利要求 14所述的通信系统, 其特征在于, 所述基站还用于向所述第一 用户发送信道状态请求消息,接收所述第一用户反馈的所述第一用户测量并生成的待干 扰协调的第一时频资源上的第一用户信道状态信息;
或者, 向其他基站发送信道状态请求消息, 接收所述其他基站转发的所述第一用户 测量并生成的待干扰协调的第一时频资源上的第一用户信道状态信息;
或者, 测量所述第一用户的上行信道信息, 根据所述上行信道信息得到所述第一用 户的下行信道状态信息。
18、 根据权利要求 14所述的通信系统, 其特征在于, 所述管理设备用于根据所述 第一用户信道状态信息和所述第二用户信道状态信息,对所述第一用户和第二用户的信 道进行迫零处理、 块对角化处理或者最大信号泄露噪声比处理, 得到所述第二用户对应 的发射功率和预编码矩阵。
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