WO2013166717A1 - 异构网分层组网中的干扰抑制方法、装置和系统 - Google Patents

异构网分层组网中的干扰抑制方法、装置和系统 Download PDF

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Publication number
WO2013166717A1
WO2013166717A1 PCT/CN2012/075386 CN2012075386W WO2013166717A1 WO 2013166717 A1 WO2013166717 A1 WO 2013166717A1 CN 2012075386 W CN2012075386 W CN 2012075386W WO 2013166717 A1 WO2013166717 A1 WO 2013166717A1
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WIPO (PCT)
Prior art keywords
cell
interference
information
user equipment
base station
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PCT/CN2012/075386
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English (en)
French (fr)
Inventor
李宏超
周华
吴建明
Original Assignee
富士通株式会社
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
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2012/075386 priority Critical patent/WO2013166717A1/zh
Priority to CN201280072729.9A priority patent/CN104254978A/zh
Publication of WO2013166717A1 publication Critical patent/WO2013166717A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10Dynamic resource partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70702Intercell-related aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/32Hierarchical cell structures

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device and system for suppressing interference in a heterogeneous network hierarchical networking. Background technique
  • Heterogeneous Network Heterogeneous Network
  • LTE-A Long-term evolution
  • Pico-cell hotspot coverage cell
  • the network node includes a home base station (HeNB, Home eNodeB), a hotspot coverage cell (Pico-cell), etc., and uses a lower transmit power to cover a specific area or user, and the networking mode is relatively flexible.
  • FIG. 1 is a schematic diagram of the Macro-Pico scene.
  • C E Cell Range Expansion
  • the Pico cell covers more users and receives power based on the reference signal (RSRP, Reference Signal).
  • RSRP Reference Signal
  • the cell selection method of Received Power it is proposed to introduce "RSRP+bias" biased to the micro cell, that is, the reference signal received power (RSRP) of the user equipment UE receiving the micro cell (Pico cell) is smaller than that of the macro cell.
  • the bias is within the bias, the user equipment UE belongs to the micro cell. Combined with a certain elCIC mechanism, the overall throughput of the system can be improved.
  • ABS Almost Blank Subframes
  • the inventors have found that the CRE causes the offset value of the cell handover/selection/reselection to be unbalanced, and the imbalance of the offset value introduces the following problems, for example, causing cell-specific from the strong cell.
  • CRS Cell-Specification Reference Signal
  • RRM Radio Resource Management
  • CSI channel state information
  • CSI data demodulation
  • synchronization channel Demodulation broadcast channel demodulation and control channel demodulation, etc.
  • PBCH strong cell broadcast channel
  • PBCH primary/secondary synchronization channel.
  • PSS/SSS paging
  • SIB-1 System Information Block-1
  • SIB-1 System Information Block-1
  • the object of the embodiments of the present invention is to provide a method, a device and a system for suppressing interference in a heterogeneous network layered networking, which can suppress interference from a strong cell, and can solve the problem of unbalanced inter-cell handover, selection, and reselection.
  • the problem caused by the offset value and the complexity of the signaling transmission of the system can be simplified.
  • an interference suppression method in a heterogeneous network layered networking includes:
  • the base station of the serving cell to which the user equipment belongs acquires related parameters of the neighboring cell and/or the serving cell; and notifies the user equipment of the relevant parameter, and the related parameter is used by the user equipment to perform corresponding interference suppression by using the relevant parameter;
  • the related parameter includes system information or some parameter information included in the system information.
  • the system information includes one or more of the following information corresponding to the cell identifier: CRS port number, system frame number, PHICH configuration information, Cyclic prefix type information, downstream bandwidth information, MBSFN configuration information, and related parameters in System Information Block-1.
  • an interference suppression method in a heterogeneous network layered networking includes:
  • the user equipment receives the neighboring cell and/or the related parameter of the serving cell notified by the base station of the serving cell; the related parameter includes system information or includes some parameter information in the system information; the system information includes the following information corresponding to the cell identifier One or more of them:
  • a base station includes: a first acquiring unit, where the first acquiring unit is configured to acquire related parameters of a neighboring cell, and/or a serving cell;
  • a first notification unit configured to notify the user equipment of the related parameter, so that the user equipment performs corresponding interference suppression according to the related parameter
  • the related parameter includes system information or some parameter information included in the system information.
  • the system information includes one or more of the following information corresponding to the cell identifier: CRS port number, system frame number, PHICH configuration information, Cyclic prefix type information, downstream bandwidth information, MBSFN configuration information, and related parameters in System Information Block-1.
  • a user equipment includes: a second receiving unit configured to receive a neighboring cell notified by a base station of a serving cell and/or the neighboring cell Related parameters of the serving cell;
  • the related parameter includes system information or some parameter information included in the system information; the system information includes one or more of the following information corresponding to the cell identifier: CRS port number, system frame number, PHICH configuration information, cyclic prefix Type information, downstream bandwidth information, MBSFN configuration information, and related parameters in System Information Block-1.
  • a network system includes: a macro base station, where the macro base station is the foregoing base station;
  • micro base station is the foregoing base station
  • One or more user equipments the user equipment being the user equipment.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform the heterogeneous network hierarchical networking described above in the base station Interference suppression method.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an interference suppression method in a heterogeneous network hierarchical networking described above in a base station .
  • a computer readable program is provided, wherein when the program is executed in a user equipment, the program causes a computer to perform the heterogeneous network hierarchical group described above in the user equipment Interference suppression method in the network.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform interference suppression in a heterogeneous network hierarchical networking described above in a user equipment method.
  • the user equipment can notify the user equipment of the relevant parameters of the neighboring cell and/or the serving cell for performing interference suppression, so that the user equipment obtains the relevant parameters of the neighboring cell, so that the user equipment can be
  • the relevant parameters are used to perform corresponding interference suppression, which solves the problems caused by unbalanced inter-cell handover, selection, and reselection offset values, and can simplify the signaling transmission complexity of the system.
  • Figure 1 is a schematic diagram of a Macro-Pico scene
  • FIG. 2A is a flowchart of a method for suppressing interference in a heterogeneous network layered networking according to Embodiment 1 of the present invention
  • FIG. 2B to FIG. 2D are schematic diagrams of signaling structures according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of an interference suppression method in a heterogeneous network layered networking according to Embodiment 2 of the present invention
  • FIG. 4A is a schematic diagram of a scenario of Embodiment 3 of the present invention.
  • FIG. 4B is a flowchart of an interference suppression method according to Embodiment 3 of the present invention.
  • FIG. 6 is a flowchart of an interference suppression method according to Embodiment 5 of the present invention.
  • FIG. 7A is a schematic diagram of a scenario of Embodiment 6 of the present invention.
  • FIG. 7B is a flowchart of an interference suppression method according to Embodiment 6 of the present invention
  • 8 is a flowchart of an interference suppression method according to Embodiment 7 of the present invention
  • FIG. 10 is a flowchart of an interference method according to Embodiment 9 of the present invention.
  • FIG. 11A is a schematic diagram of a scenario of Embodiment 10 of the present invention.
  • FIG. 11B is a flowchart of an interference suppression method according to Embodiment 10 of the present invention.
  • Figure 13 is a block diagram showing the structure of a base station according to Embodiment 12 of the present invention.
  • Figure 14 is a block diagram showing the structure of a base station according to Embodiment 13 of the present invention.
  • Figure 15 is a block diagram showing the structure of a user equipment according to Embodiment 15 of the present invention. detailed description
  • a base station including a macro cell base station and one or more micro cells is included.
  • the base station can obtain the related parameters of the neighboring cell, and notify the user equipment of the neighboring cell and the related parameter of the local cell to the user equipment of the cell to be received, so that the user equipment belonging to the cell can receive the relevant parameter.
  • the user equipment may use the obtained related parameters of the neighboring cell to perform corresponding interference suppression, or when the user equipment is in the local cell, according to relevant parameters of the current cell, when the user equipment moves to the neighboring cell. Interference suppression in this cell.
  • the related parameter may be system information or some parameter information included in the system information; the system information includes one or more of the following information corresponding to the cell identifier: CRS port number, system frame number, PHICH configuration information , Cyclic prefix type information, downlink bandwidth information, the data area includes a CRS subframe (Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information), and System Information Block_1 (SIB) Related parameters in -1 ).
  • CRS subframe Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information
  • SIB System Information Block_1
  • Step 201 The base station of the serving cell to which the user equipment belongs acquires related parameters of the neighboring cell and/or the serving cell.
  • the base station may be a macro base station, so that the macro base station may acquire system information of the one or more adjacent micro cells; in addition, the base station may also be a micro base station;
  • the base station may select the related parameter from the neighboring cell that is acquired in advance, and/or the system information of the serving cell, where the related parameter may be all system information or a subset of system information.
  • the system information may include one or more of the following information corresponding to the cell identifier: CRS port number, system frame number (SFN, System Frame Number), hybrid automatic repeat request indication channel configuration (PHICH configuration) Information, Cyclic Prefix type information, DL bandwidth information, data area containing CRS subframes (MBSF subframe configuration information), and System Information Block-1 (SIB-1) Related parameters; however, the system information is not limited to the above information, and other information may be included as needed;
  • the cyclic prefix type information may include cyclic prefix length information, that is, a regular length, or a cyclic prefix of an extended length.
  • Step 202 Notify the user equipment of the related parameter, so that the user equipment performs corresponding interference suppression according to the related parameter.
  • the user equipment may be notified by means of broadcast, or may be sent to one or some user equipments by means of user-specific signaling;
  • the interference is caused by an unbalanced inter-cell handover, selection, and reselection offset value caused by cell coverage extension (CRE) of the micro cell
  • the interference may include: a cell from a strong cell. Interference from a dedicated reference signal (CRS), and interference from a strong cell's synchronization channel, broadcast channel, and/or broadcast signaling, where the synchronization channel represents the primary synchronization signal/synchronization signal (PSS) , Secondary Synchronization Signal)), the broadcast channel includes a Physical Broadcast Channel (PBCH), and the broadcast signaling indicates the system information block-x (SIB-x, System Information Block-x) and paging (Paging) transmission.
  • CRS dedicated reference signal
  • PSS primary synchronization signal/synchronization signal
  • PBCH Physical Broadcast Channel
  • the broadcast signaling indicates the system information block-x (SIB-x, System Information Block-x) and paging (Paging) transmission.
  • the user equipment can perform corresponding interference suppression according to the obtained related parameters, that is, interference mitigation for interference from the CRS of the strong cell, to enhance demodulation of the data/control channel, and/or broadcast to the strong cell.
  • interference mitigation for interference from the CRS of the strong cell to enhance demodulation of the data/control channel, and/or broadcast to the strong cell.
  • the interference of the channel, broadcast signaling, and/or synchronization channel is demodulated to mitigate the interference.
  • the related parameters may be represented by a data structure of a list, as shown in FIGS. 2B to 2D. Do not.
  • the cell ID (Cell ID) list includes the cell identifier and related parameters corresponding to each cell identifier.
  • the cell identifier is from #0 to #N
  • the related parameters of the corresponding cell ID#0 include: CRS The number of the port, the MBSFN configuration information, the CRS bandwidth, and the like, the information corresponding to the other cell identifiers and the foregoing type, which may be the obtained system information, or may be part of the system information, and the relevant parameters corresponding to each cell identifier may be the same. Or different, or partially the same, the content of the parameters can be determined according to the actual situation of the network.
  • the foregoing cell identifier may include an identifier of a current home cell, and may also include an identifier of a neighboring cell.
  • the base station on the network side can notify the user equipment of related parameters for performing interference suppression on the neighboring cell and/or the serving cell, so that the user equipment obtains related parameters of the neighboring cell, and uses the related parameter.
  • Corresponding interference suppression is performed, for example, interference mitigation of interference from CRSs of strong cells to enhance demodulation of data/control channels, and/or for broadcast channels, broadcast signaling and/or synchronization channels from strong cells.
  • the interference is enhanced by demodulation to mitigate the interference, and the cell identification and the cell detection may be performed according to the relevant parameters, and other control signaling (such as PDCCH, SIB-1, of the cell is demodulated according to the obtained related parameters of the cell.
  • Paging, etc. and data services thus solving the problems caused by unbalanced inter-cell handover, selection, and reselection of offset values, suppressing interference, and simplifying the signaling complexity of the system.
  • step 201 when the related parameter is system information, step 201 may obtain system information of the neighboring cell in the following manner; but is not limited to the following manner, and may be obtained in other manners.
  • the macro base station may collect system information of the adjacent pico cell to obtain system information of the adjacent micro cell;
  • the operation, management, and maintenance (OAM) function of the network side actively sends the system information of the micro cell, and the macro base station can receive the system information of the micro cell delivered by the OAM to obtain the system information.
  • System information of the micro cell For example, the operation, management, and maintenance (OAM) function of the network side actively sends the system information of the micro cell, and the macro base station can receive the system information of the micro cell delivered by the OAM to obtain the system information.
  • System information of the micro cell For example, the operation, management, and maintenance (OAM) function of the network side actively sends the system information of the micro cell, and the macro base station can receive the system information of the micro cell delivered by the OAM to obtain the system information.
  • System information of the micro cell For example, the operation, management, and maintenance (OAM) function of the network side actively sends the system information of the micro cell, and the macro base station can receive the system information of the micro cell delivered by the OAM to obtain the system information.
  • the macro base station may send a request for sending system information of the micro cell to the OAM on the network side, and receive system information of the micro cell that is sent by the OAM according to the request;
  • the macro base station may also acquire system information of the neighboring micro cell by interacting with the base station of the adjacent micro cell, that is, the macro base station sends the micro cell to the base station of the adjacent micro cell.
  • a request for system information after receiving the request, the base station of the micro cell transmits the system information of the micro cell to the macro base station;
  • the system information of the neighboring cell is obtained in the following manner:
  • the manner in which the micro base station acquires the system information of the neighboring cell is similar to the manner in which the macro base station acquires the system information of the neighboring cell, for example,
  • the OAM (Operation Administration and Maintenance) function entity actively sends the system information of the neighboring cell of the micro base station, and the micro base station can receive the system information of the neighboring cell delivered by the OAM; for example
  • the micro base station may send a request for acquiring the system information of the neighboring cell to the OAM on the network side, and receive system information of the neighboring cell that is sent by the
  • system information of the current home cell may be obtained by receiving information about the current home cell delivered by the OAM function entity.
  • the method further includes: acquiring a mutual interference relationship between the serving cell and the neighboring cell, or acquiring the serving cell, the neighboring cell, and the user equipment.
  • the foregoing step 201 may specifically include: the base station selecting the related parameter according to the acquired mutual interference relationship.
  • the mutual interference relationship refers to: a low-power node cell in a heterogeneous network (generally referred to as a micro cell, or a cell switching, selecting, reselecting a micro cell with a relatively large offset value) Interference from high-power nodes (generally referred to as strong cell or cell handover, selection, reselection of micro-cells with relatively small offset values), ie CRS interference from strong cells, or strong cell synchronization channel, broadcast channel and/or broadcast Signaling interference.
  • a low-power node cell in a heterogeneous network generally referred to as a micro cell, or a cell switching, selecting, reselecting a micro cell with a relatively large offset value
  • Interference from high-power nodes generally referred to as strong cell or cell handover, selection, reselection of micro-cells with relatively small offset values
  • ie CRS interference from strong cells or strong cell synchronization channel, broadcast channel and/or broadcast Signaling interference.
  • radio resource management measurement causes performance degradation, or even inoperability; or because of the signal strength from a strong cell, the broadcast channel and broadcast of the home subscriber to the weak cell in the strong cell Demodulation and detection of signaling and/or synchronization channels, etc., as well as radio resource management measurements based on reference symbols, cause performance degradation, or even inoperability.
  • the strong cell refers to a cell with a relatively strong signal, and may be a macro cell or a "micro cell that generates strong interference".
  • the weak cell refers to a micro cell that is interfered by a strong cell.
  • the user equipment detects the signal from the micro cell A. Due to strong interference from the micro cell B, we call the micro cell A a weak cell.
  • the base station may acquire the mutual interference relationship by receiving a mutual interference relationship between the serving cell and the neighboring cell delivered by the network side 0AM.
  • the mutual interference relationship between the serving cell, the neighboring cell, and the user equipment may be acquired through information exchange between the base stations or according to the measurement result reported by the user equipment, so that the mutual interference relationship obtained in this case is more accurate.
  • the measurement result reported by the user equipment UE may include radio resource management such as reference signal received power (RSRP, R e erenCe Signal Receiving Power) and reference signal receiving quality (RSRQ, Reference Signal Receiving Quality) (RRM, Radio Resource) Management) Measurement value.
  • radio resource management such as reference signal received power (RSRP, R e erenCe Signal Receiving Power) and reference signal receiving quality (RSRQ, Reference Signal Receiving Quality) (RRM, Radio Resource) Management) Measurement value.
  • the interference type can be determined by the obtained mutual interference relationship, that is, the interference of the cell-specific reference signal (CRS) of the strong cell, and/or the synchronization channel, the broadcast channel, and/or the broadcast signaling of the strong cell. Interference, thereby selecting corresponding relevant parameters according to the mutual interference relationship.
  • CRS cell-specific reference signal
  • the base station can indicate the type of interference in an explicit manner.
  • the method further includes: adding indication information for indicating an interference type to the related parameter; and the base station notifying the related parameter that includes the indication information.
  • the indication information may be interference of a cell-specific reference signal (CRS) indicating a strong cell of the neighboring cell and/or the serving cell, or a synchronization channel, a broadcast channel, and/or a broadcast of the enhanced cell.
  • CRS cell-specific reference signal
  • the indication information may be information indicating that the neighboring cell and/or the serving cell is a strong interfering cell and/or a interfered weak cell.
  • strong interfering cell indicates that the interference type is CRS interference from a strong cell, corresponding to "CRS interference mitigation”
  • interfered weak cell indicates that the interference type is a synchronization channel, a broadcast channel, and/or from a strong cell.
  • the interference of the broadcast signaling corresponds to "performing cell identification and cell detection", that is, performing demodulation enhancement. If both types of interference are present at the same time, both interference mitigation and demodulation enhancement are performed. In this way, after receiving the relevant parameter, the user equipment can determine which interference suppression to perform according to the indication information.
  • the indication information may be indicated by a lbit parameter.
  • the interference type is CRS interference of a strong cell; when the lbit is "1", the interference type is a strong cell. Interference from synchronization channels, broadcast channels, and/or broadcast signaling. vice versa.
  • the number of the indication information is consistent with the number of cell identifiers, and is used to indicate the interference type of each cell respectively.
  • an indication information may be added for each cell identifier. Instructing each cell to identify the interference type of the corresponding cell; or, the indication information is one, and uniformly indicating the interference type of all the cells. In this case, when the interference type of the cell corresponding to each cell identifier in the cell list is the same, The type of interference can be indicated by an indication message, which saves signaling overhead.
  • the base station can indicate the type of interference in an implicit manner.
  • the method further includes: according to the mutual interference relationship, including, in the selected related parameter, a predetermined information for indicating an interference type, so that the user equipment is configured according to the predetermined The information is subject to corresponding interference suppression.
  • the parameters are determined according to a predetermined rule.
  • the MBSFN configuration information is included in the related parameter, and the MBSFN configuration information is used to indicate that the interference type is CRS interference. Accordingly, the user equipment may determine that the CRS interference belongs to the CRS interference according to the MBSFN configuration information, thereby performing corresponding CRS interference suppression, that is, interference mitigation. In order to enhance the demodulation of the control channel/data channel, of course, it is not limited to the above parameters, and other parameters may be used to indicate the type of interference.
  • the parameter CP type is included in the relevant parameter according to a predetermined rule, and the interference type is indicated by using the CP type.
  • the user equipment may determine the interference type according to the CP type information, thereby performing corresponding interference suppression, that is, demodulation enhancement, enhancing cell identification and cell detection for the weak cell, and of course, not limited to using the foregoing parameters to indicate, Other parameters, such as raiCH configuration information, etc., may be used to indicate the type of interference.
  • the base station may not determine the mutual interference relationship, and does not indicate the interference type, but is determined by the user side.
  • the method further includes: determining, according to the measurement result reported by the neighboring cell, the user equipment to be handed over to the target neighboring cell, and further identifying information of the target neighboring cell. Notifying the user equipment UE;
  • the measurement result may include reference signal received power reported by the neighboring cell (RSRP, Reference)
  • RRM Radio Resource Management
  • the UE may demodulate other control signaling and corresponding service data of the target neighboring cell according to the system information of the cell corresponding to the identifier information, or perform CRS interference suppression.
  • the base station may further receive the changed system information reported by the base station of the neighboring cell; and notify the user equipment of the changed system information.
  • the base station may further receive the changed system information reported by the base station of the neighboring cell; and notify the user equipment of the changed system information.
  • the base station may further receive the changed system information reported by the base station of the neighboring cell; and notify the user equipment of the changed system information.
  • the user equipment UE may further obtain the system information of the changed micro cell in time, to ensure correct demodulation of other control signaling (such as PDCCH, SIB-1, Paging, etc.) and service data of the cell;
  • the CRS of the strong cell interferes, the user equipment is guaranteed to perform interference suppression.
  • FIG. 3 is a flowchart of an interference suppression method in a heterogeneous network layered networking according to Embodiment 2 of the present invention. As shown in Figure 3, the method includes:
  • Step 301 The user equipment receives, by the base station of the serving cell, a neighboring cell and/or a related parameter of the serving cell.
  • step 301 when the user equipment UE currently belongs to the serving cell is a macro cell, the UE device may receive the neighboring cell notified by the macro base station and/or related parameters of the macro cell; When the current home cell of the user equipment is a micro cell, the user equipment UE may receive related parameters of the neighboring cell and/or the micro cell notified by the micro base station.
  • the data structure of the relevant parameters may be any of Figs. 2B to 2D.
  • the method may further include: the user equipment UE storing the received related parameters.
  • the neighboring cell identity information and/or the identity information of the serving cell may be stored corresponding to the relevant parameters of the cell.
  • the related parameters received by the UE further include system information of the neighboring cell change.
  • the method further includes: the user equipment is synchronized to the current serving cell, and establishing a connection with the base station of the current serving cell. (See step 300). This step 300 is an optional step.
  • the user equipment UE when the user equipment UE moves to a certain neighboring micro cell (such as using Cel l-B to indicate the one adjacent micro cell), and the user equipment UE does not receive the Cel in advance.
  • l B related parameters.
  • the user equipment UE first synchronizes to a cell with strong signal (for example, a macro cell or a micro cell that generates strong interference), establishes a connection with a base station of the cell with strong signal, and acquires the Cel 1 from a base station of the cell. – related parameters of B.
  • step 300 is performed before step 301, that is, the user equipment is synchronized to a strong signal.
  • a cell establishing a connection with a base station of the cell with strong signal; receiving a relevant parameter of the base station including the Cell-B notified by the base station of the cell with strong signal.
  • the user equipment UE can perform corresponding interference suppression according to the relevant parameters of the Cel-B.
  • the method further comprises: performing corresponding interference suppression by using the received related parameter (see step 302).
  • step 302 is an optional step that is performed only if the above interference occurs.
  • the related parameter when the base station side displays the indication of the interference type, the related parameter further includes indication information for indicating the type of the interference; and before the step 302, the method further includes: the user equipment determining the interference type according to the indication information. .
  • the related parameter when the base station side implicitly indicates the interference type, the related parameter includes a predetermined information for indicating the interference type; and before the step 302, the method further includes: the user equipment according to the predetermined usage
  • the type of interference is determined by information indicating the type of interference.
  • the method further includes: the user equipment may be based on the relevant parameters notified by the base station, and the CRS of the serving cell and/or the neighboring cell or Measurement of other signals; or determining the type of interference based on measurements of CRS or other signals for the serving cell and/or neighboring cells.
  • the method further includes: the user equipment reporting the measurement result of the serving cell and the neighboring cell to the base station, so that the base station obtains, between the serving cell, the neighboring cell, and the user equipment according to the reported measurement result.
  • Mutual interference relationship the user equipment reporting the measurement result of the serving cell and the neighboring cell to the base station, so that the base station obtains, between the serving cell, the neighboring cell, and the user equipment according to the reported measurement result.
  • the interference suppression method in the embodiment of the present invention is described in detail below in conjunction with a specific scenario.
  • the cell with strong signal in the heterogeneous network is a strong cell
  • the system information of the neighboring cell is described by taking the relevant parameter as system information and the macro cell broadcasting.
  • FIG. 4A is a schematic diagram of a scenario of Embodiment 3 of the present invention
  • FIG. 4B is a flowchart of an interference suppression method according to Embodiment 3 of the present invention.
  • the scenario in which the user equipment UE in the connected state belongs to the macro cell (Macro cel l ) and moves to the CRE area of the micro cell will be described as an example.
  • the method includes:
  • Step 401 The macro base station acquires system information of the adjacent micro cell.
  • the system information of the micro cell is as described in Embodiments 1 to 2, and details are not described herein;
  • the method for collecting the system information of the micro cell by the macro base station is as described in Embodiments 1 to 2, and details are not described herein again.
  • Step 402 The macro base station notifies the user equipment of the acquired system information of the micro cell.
  • the macro base station may include the system information in the SIB4 of the macro cell for broadcast, which may simplify the signaling transmission complexity of the system; in addition, the system information of the micro area may be sent in other manners. , such as paging, etc., depending on the specific circumstances;
  • a user or some users may be notified by means of user-specific signaling
  • the correlation parameters may employ the data structures of Figures 2B through 2D.
  • Step 403 The user equipment UE that belongs to the macro cell receives the system information notified by the macro base station, and obtains system information of the micro cell.
  • the UE receives the SIB4 broadcast by the macro base station, and reads system information of the micro area from the UE.
  • the cell identifier information of the micro cell may be stored in association with the system information of the micro cell; thus, when the user equipment UE switches from the macro cell to the CRE of the micro cell, since the user equipment has already The related parameter of the micro cell notified by the macro base station is obtained. Therefore, the user equipment UE can find the corresponding system information of the micro cell according to the cell identity information of the micro cell, and use the system information pair of the micro cell to The CRS of the macro cell performs interference mitigation, that is, demodulates the control signaling of the micro cell and the corresponding service data, or suppresses interference of the synchronization channel, the synchronization signaling, and/or the broadcast information of the macro cell, that is, the cell detection and Cell identification.
  • interference mitigation that is, demodulates the control signaling of the micro cell and the corresponding service data, or suppresses interference of the synchronization channel, the synchronization signaling, and/or the broadcast information of the macro cell, that is, the cell detection and Cell identification.
  • Step 405 When the UE moves to the CRE area of the cell, the macro base station decides to switch the UE to the micro cell according to the measurement result reported by the user equipment UE, and notifies the corresponding cell identity information of the UE;
  • the measurement result reported by the user equipment UE may include RRM measurement values such as RSRP and RSRQ, and the manner of determining the target cell to be switched is similar to the prior art, and details are not described herein again.
  • Step 406 The user equipment UE receives the identification information of the micro cell, and searches for system information of the micro cell from the acquired system information.
  • Step 407 The user equipment UE determines an interference type of the micro cell.
  • the method for determining the interference type of the micro cell by the user equipment is as described in Embodiment 2, and is not described here.
  • the interference type is determined to be a macro cell synchronization channel and broadcast. Interference of channel and/or broadcast information, that is, the micro cell is a weak cell that is interfered.
  • Step 408 The user equipment uses the system information of the micro cell to synchronize the channel and the broadcast signal with the macro cell.
  • the interference of the channel and/or the broadcast information is suppressed, that is, the micro cell performs cell identification and cell detection; wherein one or more of the following parameters in the system information, such as the number of CRS ports and the system frame number (SFN, System Frame Number), hybrid automatic repeat request indication (PHICH configuration) information, Cyclic Prefix type information, DL bandwidth information, and System Information Block-1 (SIB-1) Related parameters.
  • SIB-1 System Information Block-1
  • the CRS interference suppression may be performed by using parameters in the system information, such as the number of CRS ports, MBSFN configuration information, and the like.
  • the system information of the neighboring micro cell can be obtained from the macro base station, and after the UE switches to the CRE area of the micro cell, the cell can be determined.
  • the interference type is used, and the interference of the micro cell is suppressed by using the obtained system information of the micro cell according to the interference type, that is, the cell information of the micro cell is used for cell detection and cell identification, thereby enhancing cell identification for the weak cell.
  • detection solves the problems caused by poor reception quality in the prior art, and can simplify the signaling transmission load of the system.
  • the user equipment determines the interference type by itself, and the base station side does not indicate the interference type.
  • the interference type is indicated by the base station side as an example for description.
  • Fig. 5 is a flow chart showing an interference suppression method according to a fourth embodiment of the present invention.
  • the case where the user equipment UE in the connected state belongs to the macro cell (Macro cel l ) and moves to the CRE area of the micro cell will be described as an example.
  • the method includes:
  • Step 501 The macro base station acquires system information of the adjacent micro cell.
  • system information of the adjacent micro cell is as described in Embodiments 1 to 2, and details are not described herein.
  • the macro base station collects system information of the adjacent micro cell as in Embodiment 1 to 2, no longer repeat here;
  • the number of adjacent micro cells is one or more.
  • Step 502 The macro base station acquires a mutual interference relationship between the macro cell and the adjacent micro cell, or between the macro cell, the adjacent micro cell, and the user equipment.
  • Step 503 The macro base station selects the related parameter according to the acquired mutual interference relationship.
  • the macro base station may select relevant parameters for the micro cell from the system information, such as the following.
  • the parameter One or several such as CRS port number, system frame number (SFN, System Frame Number), hybrid automatic repeat request indication channel configuration (PHICH configuration) information, Cyclic prefix type (Cycl ic Prefix type) information, downlink bandwidth ( DL bandwidth ) Information, and related parameters in System Information Block_1 ( SIB-1 ).
  • Step 504 The macro base station adds indication information indicating an interference type to the related parameter.
  • indication information indicating an interference type
  • the macro base station adds indication information indicating an interference type to the related parameter.
  • Step 505 The macro base station notifies the user equipment of related parameters of the acquired micro cell
  • the macro base station may include the relevant parameter in the SIB4 of the macro cell for broadcast, which may simplify the signaling transmission complexity of the system; in addition, the system information of the micro area may be broadcast in other manners. , such as separate broadcasting, etc., depending on the specific circumstances;
  • a user or some users may be notified by means of user-specific signaling.
  • Step 506 The user equipment UE that belongs to the macro cell receives the relevant parameter notified by the macro base station, and obtains related parameters of the adjacent micro cell.
  • Step 507 storing related parameters of the adjacent micro cell
  • the cell identification information of the neighboring micro cell may be stored corresponding to the related parameter and the indication information of the micro cell;
  • the user equipment UE may find a corresponding parameter and indication information of the target micro cell according to the cell identity information of the target micro cell, and use the target micro cell.
  • the indication information and related parameters perform corresponding interference suppression on the target microcell.
  • Step 508 When the UE moves to the CRE area of the neighboring micro cell, the macro base station decides to switch the UE to the neighboring micro cell according to the measurement result reported by the user equipment UE, and notifies the corresponding target cell of the UE. Identification information;
  • the measurement result reported by the user equipment UE may include an RRM measurement value such as RSRP and RSRQ, and the manner of determining the target cell to be switched is similar to the prior art, and details are not described herein again.
  • Step 509 The user equipment UE receives the identifier information of the target cell, and searches for related parameters of the target micro cell from the acquired system information of the micro cell.
  • Step 510 The user equipment UE determines an interference type of the micro cell.
  • the user equipment may determine the micro cell according to the indication information “1” in the relevant parameter.
  • the interference type is interfered by the synchronization channel, broadcast channel and/or broadcast signaling of the macro cell, that is, the micro cell is a weak cell that is interfered.
  • Step 511 The user equipment uses the system information of the target micro cell to suppress interference received by the target micro cell.
  • the interference of the macro cell synchronization channel, the broadcast channel, and/or the broadcast information is suppressed, that is, the cell information and the cell identification are performed on the micro cell by using the system information, so as to enhance the cell identification of the weak cell.
  • Cell detection the interference of the macro cell synchronization channel, the broadcast channel, and/or the broadcast information is suppressed, that is, the cell information and the cell identification are performed on the micro cell by using the system information, so as to enhance the cell identification of the weak cell. Cell detection.
  • the related information of the neighboring micro cell may be acquired from the macro base station, where the related information includes information indicating the type of interference; After the area, the interference type of the cell is determined according to the indication information, and the interference of the micro area is suppressed by using the obtained related parameter of the target micro area according to the interference type, thereby solving the poor reception quality in the prior art.
  • the problem and can simplify the signaling transmission load of the system.
  • Figure 6 is a flow chart showing an interference suppression method according to a fifth embodiment of the present invention.
  • the scenario in which the user equipment UE in the connected state belongs to the strong cell (Macro cel l ) and moves to the CRE area of the micro cell will be described as an example.
  • the method includes:
  • Step 601 The macro base station acquires system information of the adjacent micro cell.
  • system information of the adjacent micro cell is as described in Embodiments 1 to 2, and details are not described herein.
  • the macro base station collects system information of the adjacent micro cell as in Embodiment 1 to 2, no longer repeat here;
  • the number of adjacent micro cells is one or more.
  • Step 602 The macro base station acquires a mutual interference relationship between the macro cell and the adjacent micro cell, or between the macro cell, the adjacent micro cell, and the user equipment.
  • Step 603 The macro base station selects the related parameter according to the obtained mutual interference relationship.
  • the macro base station may select relevant parameters for the micro cell from the system information, such as the following.
  • One or several of the parameters such as the number of CRS ports, system frame number (SFN, System Frame Number), hybrid automatic Retransmission request indication channel configuration (PHICH configuration) information, Cycl ic Prefix type information, DL bandwidth information, and related parameters in System Information Block_1 (SIB-1);
  • the selected related parameters should include predetermined information indicating the type of interference, such as the downlink bandwidth, indicating that the interference type is "the interfered weak cell.”
  • Step 604 The macro base station notifies the user equipment of related parameters of the acquired micro cell.
  • Step 605 The user equipment UE that belongs to the macro cell receives the relevant parameter notified by the macro base station, and obtains related parameters of the adjacent micro cell.
  • Step 606 Store related parameters of the adjacent micro cell.
  • the cell identification information of the neighboring micro cell may be stored corresponding to the related parameter and the indication information of the micro cell;
  • the user equipment UE may find related information and indication information of the target micro cell according to the cell identity information of the target micro cell, and use the target micro cell.
  • the indication information and related information control signaling and corresponding interference suppression for the target micro cell.
  • Step 607 When the UE moves to a CRE area of a neighboring micro cell, the macro base station is configured according to the user equipment.
  • the measurement result reported by the UE determines to switch the UE to the neighboring micro cell, and notifies the UE of the corresponding target cell identity information;
  • the measurement result reported by the user equipment UE may include an RRM measurement value such as RSRP and RSRQ, and the manner of determining the target cell to be switched is similar to the prior art, and details are not described herein again.
  • Step 608 The user equipment UE receives the identifier information of the target cell, and searches for related parameters of the target micro cell from the acquired system information of the micro cell.
  • Step 609 The user equipment UE determines an interference type of the micro cell.
  • the user equipment may determine, according to the information indicating the interference type in the related parameter, such as “downstream bandwidth”, the interference type of the micro cell is a synchronization channel, a broadcast channel, and/or a broadcast signaling of the macro cell.
  • the interference that is, the micro cell is a weak cell that is interfered.
  • Step 610 The user equipment uses the related parameters of the target micro cell to suppress interference caused by the target micro cell.
  • the related information of the neighboring micro cell may be acquired from the macro base station, where the related information includes information indicating the interference type; After the target micro cell is obtained, the interference type of the cell may be determined according to the information, and the interference of the target micro cell is suppressed by using the obtained related parameter of the target micro cell according to the interference type, that is, performing cell identification and cell detection, The problem existing in the prior art is solved, and the signaling transmission load of the system can be simplified.
  • the interference type of the adjacent micro cell is "a weak cell that is interfered".
  • the indication information may be indicated by using a unified lbit, or may be separately used for each micro cell. Use 1 bit of signaling to indicate. For a cell with a strong interference type, it is similar to the above and will not be described here.
  • the above description is made by taking a strong cell as a macro cell as an example, and the strong cell may also be a micro cell that generates strong interference. This situation is similar to the macro cell, and will not be described here.
  • the adjacent micro cells there are more than one case for the adjacent micro cells, and some of the adjacent micro cells may have an interference type of "disturbed weak cells" and some "strong interference cells".
  • the lbit signaling is used for each micro cell to indicate the interference type.
  • the type of the interference is not only the type of the interference on the base station side, but the user equipment determines the interference type on the user equipment side, which is similar to the embodiment 3, and details are not described herein again.
  • FIG. 7A is a schematic diagram of a scenario of Embodiment 6 of the present invention
  • FIG. 7B is a flowchart of an interference suppression method according to Embodiment 6 of the present invention.
  • the scenario in which the user equipment UE in the connected state belongs to the micro cell is described in the CRE region of the micro cell and is interfered by the CRS from the macro cell, where the UE determines the interference type.
  • the method includes:
  • Step 701 The base station of the cell to which the user equipment belongs acquires system information of the neighboring cell.
  • the cell to which the user equipment belongs is a micro cell
  • the system information of the neighbor cell may include system information of the macro cell, and may also include system information of other micro cells, and the method for obtaining is as in Embodiments 1 to 2. Said, no longer repeat here;
  • the neighboring cell includes a macro cell.
  • Step 702 The micro base station notifies the user equipment of the acquired system information of the neighboring cell.
  • a user or some users may be notified by means of user-specific signaling.
  • Step 703 The user equipment UE that belongs to the micro cell receives the system information notified by the base station of the micro cell, and acquires system information of the neighbor cell.
  • Step 704 Store system information of the neighboring cell.
  • the cell identity information of the neighboring cell may be stored in association with the system information of the neighboring cell. Save.
  • Step 705 The user equipment determines the interference type.
  • the UE when the user equipment moves to the CRE area of the micro cell, the UE may be interfered by the CRS from the macro cell during data demodulation, control channel demodulation, RRM measurement, and CSI measurement. In this way, the user equipment can determine the interference type by itself, and does not need the network side indication, which is similar to the foregoing embodiment, and details are not described herein again.
  • Step 706 The user equipment uses the system information of the macro cell to perform interference suppression on CRS interference from the macro cell.
  • the performing interference suppression on the CRS interference from the macro cell refers to performing interference reduction on the CRS interference from the macro cell, and demodulating the control information of the target micro cell and the corresponding service data by using the obtained system information, to /Demodulation enhancement of the control channel;
  • one or more of the following parameters in the system information such as the number of CRS ports and MBSFN configuration information, etc., may be utilized.
  • the system information of the neighboring macro cell and/or the neighboring micro cell may be acquired from the micro base station, and the user equipment determines that the interference type of the cell is When the CRS of the macro cell is interfered, the CRS interference suppression may be performed according to the system information of the macro cell.
  • the foregoing embodiment 6 is an example in which the user equipment determines the interference type by itself.
  • the following describes an interference type by means of a display on the base station side as an example.
  • Figure 8 is a flow chart showing an interference suppression method according to a seventh embodiment of the present invention.
  • a scenario in which the user equipment UE in the connected state belongs to the micro cell (Macro cel l ) and is in the CRE region of the micro cell and is subjected to CRS interference from the macro cell is used as an example.
  • the micro base station displays the indication interference type.
  • the method includes:
  • Step 801 The micro base station acquires system information of the neighboring cell.
  • the system information of the neighboring cell may include the system information of the macro cell and the other micro cell, and the obtained manner is as described in Embodiments 1 to 2, and details are not described herein again;
  • the neighboring cell is a macro cell.
  • Step 802 The micro base station acquires a mutual interference relationship between the micro cell and the neighboring cell, or between the micro cell, the neighboring cell, and the user equipment.
  • Step 803 The micro base station selects the correlation parameter according to the obtained mutual interference relationship.
  • the micro base station may select relevant parameters for the macro cell from the system information, such as one or more of the following parameters, such as the number of CRS ports, And MBSFN configuration information, but not limited to the above parameters;
  • the interference types may also be determined according to the mutual interference relationship, and corresponding relevant parameters are selected for the micro cells from the system information.
  • Step 804 The micro base station adds indication information indicating an interference type to the related parameter.
  • indication information indicating an interference type to the related parameter.
  • lbit signaling “0” indicates “strong interference cell”, add “0” to the macro.
  • the indication information is also added to the relevant parameter corresponding to the cell identifier of the other micro cell.
  • Step 805 The micro base station notifies the user equipment of the acquired related parameters of the neighboring cell.
  • Step 806 The user equipment UE that belongs to the micro cell receives the related parameters of the neighboring cell notified by the micro base station, and acquires related parameters of the neighboring micro cell.
  • Step 807 storing related parameters of the adjacent micro cell
  • the cell identification information of the neighboring micro cell may be stored corresponding to the related parameter and the indication information.
  • Step 808 The user equipment UE determines the interference type.
  • the UE when the UE moves to the CRE area of the micro cell, the UE performs RRM measurement, CSI measurement, and may demodulate the data channel, the control channel, the broadcast channel, etc., from the neighboring macro cell.
  • the user equipment may determine that the interference type of the micro cell is interference of the CRS of the macro cell according to the indication information “0” in the relevant parameter of the macro cell.
  • Step 809 The user equipment uses the relevant parameters of the macro cell to suppress CRS interference from the macro cell.
  • the related information of the neighboring macro cell and the neighboring micro cell may be acquired from the micro base station, where the related information includes information indicating the interference type;
  • the interference type of the cell may be determined according to the indication information, and the CRS interference suppression is performed by using the obtained related parameter according to the interference type.
  • Figure 9 is a flow chart showing an interference suppression method according to Embodiment 7 of the present invention.
  • Step 901 The micro base station acquires system information (MIB) of the neighboring cell.
  • MIB system information
  • the system information (MIB) of the neighboring cell may include the system information of the macro cell and the other micro cell, and the obtained manner is as described in Embodiments 1 to 2, and details are not described herein again;
  • the neighboring cell is a macro cell.
  • Step 902 The micro base station acquires a mutual interference relationship between the micro cell and the neighboring cell, or between the micro cell, the neighboring cell, and the user equipment.
  • Step 903 The micro base station selects the related parameter according to the acquired mutual interference relationship.
  • the micro base station may select relevant parameters for the macro cell from the system information, such as one or more of the following parameters, such as the number of CRS ports, and MBSFN configuration information, but is not limited to the foregoing parameters;
  • the interference type may also be determined according to the mutual interference relationship, and corresponding relevant parameters are selected for the micro cells from the system information;
  • the micro base station when selecting the relevant parameter, includes a predetermined information indicating the interference type in the related parameter, for example, if the interference type is “strong interference cell”, the predetermined information is MBSFN configuration information, of course. It can also be other parameters, and will not be described here. If the interference type is "disturbed weak cell", the predetermined information may be CP information, or other parameters, and will not be described here.
  • Step 904 The micro base station notifies the user equipment of the acquired related parameters of the neighboring cell.
  • Step 905 The user equipment UE that belongs to the micro cell receives the related parameters of the neighboring cell notified by the micro base station, and acquires related parameters of the neighboring micro cell.
  • Step 906 storing related parameters of the adjacent micro cell
  • the cell identification information of the neighboring micro cell may be stored corresponding to the related parameter and the indication information.
  • Step 907 The user equipment UE determines an interference type.
  • the UE when the UE moves to the CRE area of the micro cell, the UE performs RRM measurement, CSI measurement, and may demodulate the data channel, the control channel, the broadcast channel, etc., from the neighboring macro cell.
  • the user equipment may determine, according to the information "MBSFN configuration information" in the relevant parameter of the macro cell, that the interference type of the micro cell is interference of the CRS of the macro cell.
  • Step 908 The user equipment uses the relevant parameters of the macro cell to perform interference suppression on CRS interference from the macro cell.
  • the related information of the neighboring macro cell and the adjacent micro cell may be acquired from the micro base station, where the related information includes predetermined information indicating the interference type.
  • the UE may determine the interference type of the cell according to the information, and perform CRS interference suppression by using the obtained related parameters according to the interference type.
  • the description is made by taking the interference type of the micro cell as a "strong interfering cell" and the strong cell as a macro cell.
  • the indication information may be indicated by using a unified lbit, or may be directed to Each micro cell is indicated by one lbit signaling.
  • the case where the strong cell is a micro cell that generates strong interference is similar to that of the macro cell, and details are not described herein again.
  • Figure 10 is a flow chart showing the interference method of Embodiment 9 of the present invention.
  • User equipment UE currently belongs to the micro area
  • the method includes:
  • Step 1001 When the system information of the micro cell changes, the base station of the micro cell notifies the macro base station of the macro cell of the updated system information.
  • the macro base station can update the system information of the micro area in time;
  • micro base stations may also be notified, so that other micro base stations also update system information of the micro area in time;
  • the micro cell sends the changed system information before the to time
  • Step 1002 The user equipment UE synchronizes to the macro cell to establish a connection with the macro base station.
  • Step 1003 The user equipment UE receives system information notified by the macro base station, and acquires system information of the micro area included in the system information.
  • the user equipment UE can read system information of the micro area in the system information, and the system information of the micro area 1 is updated system information.
  • Step 1004 The macro base station decides to switch the UE to the target micro cell according to the measurement result reported by the UE, and notifies the UE of the corresponding target cell identity information.
  • the measurement result reported by the user equipment UE may include RRM measurement values such as RSRP and RSRQ, and the manner of determining the target cell to be switched is similar to the prior art, and details are not described herein; For Pico cel l-1.
  • Step 1005 The user equipment UE receives the identity information of the target cell, and searches for system information of the target micro cell from the acquired system information of the micro cell.
  • Step 1006 The user equipment UE uses the system information of the target micro cell to suppress the interference received by the target micro cell.
  • the UE when the system information of the micro cell changes, if the user equipment UE does not obtain the changed system information, the UE first synchronizes to the macro cell, and obtains the system information of the micro cell change from the macro cell. Then, when the user equipment switches to the micro cell, the user equipment UE can suppress the interference received by the micro cell by using the changed system information, and ensure that the UE works normally in the micro cell.
  • FIG. 11A is a schematic diagram of a scenario of Embodiment 10 of the present invention
  • FIG. 11B is a flowchart of an interference suppression method according to Embodiment 10 of the present invention.
  • the target microcell here is Pico cel l-2, in which case there are two kinds of interference at the same time.
  • the method includes:
  • Step 1101 The base station of the micro cell 1 acquires system information of the neighboring cell.
  • the system information of the neighboring cell may include the system information of the macro cell and the micro cell 2, and the obtained manner is as described in Embodiments 1 to 2, and details are not described herein again.
  • Step 1102 The micro base station notifies the user equipment of the obtained system information of the neighboring cell.
  • Step 1103 The user equipment UE that belongs to the micro cell 1 receives system information of the neighbor cell broadcast by the base station of the micro cell 1.
  • Step 1104 Store system information of the neighboring cell.
  • the cell identity information of the neighboring cell may be stored corresponding to the system information.
  • Step 1105 The user equipment UE determines the interference type.
  • the user equipment when the UE moves from the micro cell 1 to the CRE region of the micro cell 2, the user equipment can determine the type of interference it is in, in this case, two types of interference, that is, the CRS of the macro cell. Interference with interference from the macro channel's synchronization channel, broadcast channel, and/or broadcast information.
  • Step 1106 The user equipment uses system information of the macro cell and suppresses CRS interference from the macro cell, that is, demodulation enhancement of the data/control channel; and synchronize channels, broadcast channels, and/or from the macro cell.
  • the interference of the broadcast signaling is suppressed, that is, the cell detection and identification of the micro cell 2, and the demodulation of the synchronization channel, the broadcast channel, and/or the broadcast signaling is enhanced.
  • the above embodiment is described by taking the system information in the micro cell 1 and determining the interference type on the user equipment side as an example.
  • the above judgment may be performed on the base station side of the micro cell 1 and displayed in a display or implicit manner.
  • the situation of the indication is similar to the above embodiment, and details are not described herein again.
  • Figure 12 is a flow chart showing the interference suppression method of the eleventh embodiment of the present invention.
  • a scene in which the user equipment UE is currently assigned to the micro cell 1 (Pico cel l-1) and is restarted or powered on in the CRE area of the micro cell 1 (Pico cel l-1) is taken as an example.
  • the method includes:
  • Step 1201 When the user equipment UE is restarted or powered on in the CRE area of the micro cell 1 and there is no related information of the memory neighboring cell, the user equipment UE synchronizes to the macro cell to establish a connection with the macro base station;
  • Step 1202 The user equipment UE receives system information notified by the macro base station, and acquires system information of the micro area.
  • Step 1203 The macro base station determines to switch the UE to the target micro cell according to the measurement result reported by the user equipment UE, and notify the UE of the corresponding target cell identity information.
  • the measurement result reported by the user equipment UE may include RRM measurement values such as RSRP and RSRQ, and the manner of determining the target cell to be switched is similar to the prior art, and details are not described herein; For Pico cel l-1.
  • Step 1204 The user equipment UE receives the target cell identity information, and searches for system information of the target micro cell from the acquired system information of the micro cell.
  • Step 1205 The user equipment UE performs corresponding interference suppression by using system information of the target micro cell. It can be seen from the foregoing embodiment that the macro base station or the micro base station collects system information of the neighboring cell, and notifies the user equipment, so that the user equipment can use the foregoing information to perform interference suppression.
  • the stability of the user cell search and the cell identification is ensured, and the CRS interference of the strong cell of the macro cell can be alleviated, the signaling transmission complexity of the system can be simplified, and the interference caused by the balanced offset value is applicable. problem.
  • the embodiment of the invention further provides a base station and a user equipment, as described in the following embodiments.
  • a base station and a user equipment refer to the implementation of the method, and the details of the method are not described here.
  • Figure 13 is a block diagram showing the structure of a base station according to Embodiment 12 of the present invention.
  • the base station 1300 includes: a first obtaining unit 1301 and a first notifying unit 1302.
  • the first acquiring unit 1301 is configured to acquire related parameters of a neighboring cell and/or a serving cell.
  • the notification unit 1302 is configured to notify the user equipment of the relevant parameter, where the relevant parameter is used by the user equipment to perform corresponding interference suppression according to the relevant parameter; wherein the related parameter includes system information or includes partial parameter information in the system information;
  • the system information includes one or more of the following information corresponding to the cell identifier: CRS port number, system frame number, PHICH configuration information, cyclic prefix type information, downlink bandwidth information, MBSFN configuration information, and system information block - Related parameters in 1 (SIB-1).
  • the base station may be a macro base station or a micro base station.
  • the manner in which the first acquiring unit 1301 acquires the system information of the neighboring cell is as described in Embodiment 1, and details are not described herein again.
  • the first acquiring unit 1301 acquires related parameters of one or more adjacent cells, and the first notification unit 1302 notifies the user equipment of the obtained neighboring cell and/or related information of the local cell, so that the attribution
  • the user equipment of the macro cell or the micro cell can obtain system information of the neighboring cell and/or the local cell, so that when the user equipment UE switches to the neighboring cell and is in the CRE area of the neighboring cell, The user equipment UE may perform corresponding interference suppression by using the obtained related parameters of the neighboring cell.
  • the first obtaining unit 1301 is configured to acquire system information of the neighboring cell and/or the serving cell, and from the neighboring cell, and/or Select relevant parameters in the system information of the serving cell.
  • the specific selection manner is as described in the foregoing embodiment, and details are not described herein again.
  • Figure 14 is a block diagram showing the structure of a base station according to Embodiment 13 of the present invention. As shown in FIG. 14, the base station 1400 includes: a first obtaining unit 1401 and a first notifying unit 1402, which are similar to the embodiment 12, and are not described herein again.
  • the base station 1400 further includes: a second obtaining unit 1403, configured to acquire a mutual interference relationship between the serving cell and the neighboring cell, or between the serving cell, the neighboring cell, and the user equipment;
  • the first obtaining unit 1401 is configured to select related parameters according to the acquired mutual interference relationship.
  • the base station 1400 further includes: a first processing unit 1404, where the first processing unit 1404 is configured to add indication information indicating the interference type to the related parameter.
  • the first notification unit 1402 notifies the relevant parameter including the indication information.
  • the first acquiring unit 1401 acquires related parameters of one or more adjacent cells
  • the second acquiring unit 1403 determines a mutual interference relationship
  • the first processing unit 1404 adds the indication information according to the mutual interference relationship in the related parameter.
  • the first notification unit 1402 notifies the user equipment of the neighboring cell and/or the related parameter of the local cell, so that the user equipment belonging to the macro cell or the micro cell can obtain the system of the neighboring cell and/or the local cell.
  • the information is such that when the user equipment UE is handed over to the neighboring cell and is in the CRE area of the neighboring cell, the user equipment UE can perform corresponding interference suppression by using the obtained related parameters of the neighboring cell.
  • the embodiment 14 of the present invention further provides a base station, which is different from the embodiment 12 in that the interference is similarly indicated by the base station side in an implicit manner.
  • the first obtaining unit 1401 is configured to acquire related parameters according to the mutual interference relationship and the predetermined information for indicating the interference type, where the acquired related parameters include predetermined information for indicating the interference type.
  • the functions of other units are similar to those of Embodiment 2, and are not described herein again.
  • the base station further includes:
  • the first receiving unit is configured to receive the changed system information reported by the neighboring cell.
  • the second notifying unit is configured to notify the user equipment of the changed system information.
  • Figure 15 is a block diagram showing the structure of a user equipment according to Embodiment 15 of the present invention.
  • the user equipment 1500 includes: a second receiving unit 1501, where the second receiving unit 1501 is configured to receive related parameters of a neighboring cell and/or a serving cell notified by a base station of a serving cell;
  • the related parameter includes system information or some parameter information included in the system information; the system information includes one or more of the following information corresponding to the cell identifier: CRS port number, system frame number, PHICH configuration information, and cyclic prefix type. Information, downlink bandwidth information, MBSFN configuration information, and system information block -l (SIB-l) Related parameters in .
  • SIB-l system information block -l
  • the user equipment 1500 further includes: a second processing unit 1502, the second processing unit 1502 configured to perform corresponding interference suppression according to the received related parameters.
  • the user equipment 1500 further includes a first determining unit 1503, and the first determining unit 1503 is configured to determine the type of interference that the user equipment is interfered with.
  • the related parameter further includes indication information for indicating an interference type.
  • the first determining unit 1503 is configured to determine the interference type based on the indication information before the second processing unit 1502 performs interference suppression.
  • the related parameter includes predetermined information for indicating the type of interference
  • the first determining unit 1503 is configured to determine the interference type based on the predetermined information indicating the type of interference before the second processing unit 1502 performs interference suppression.
  • the first determining unit 1503 is configured to determine the interference type by itself, as described in Embodiment 2, and details are not described herein again.
  • the user equipment 1500 further includes: a reporting unit (not shown), where the reporting unit is configured to report the measurement result of the serving cell and the neighboring cell to the base station, so that the base station obtains the serving cell according to the reported measurement result, Mutual interference relationship between neighboring cells and user equipment.
  • a reporting unit (not shown)
  • the reporting unit is configured to report the measurement result of the serving cell and the neighboring cell to the base station, so that the base station obtains the serving cell according to the reported measurement result, Mutual interference relationship between neighboring cells and user equipment.
  • the user equipment UE can receive the system information notified by the base station of the micro cell or the macro cell that belongs to the current cell to obtain the corresponding system information of the neighboring cell. Therefore, when the user equipment is switched or the cell is reselected to the target cell, the user equipment can suppress the interference received by the target cell by using the acquired system information of the micro cell, and use the cell-specific reference signal for the strong cell.
  • the interference is mitigated, and/or the interference of the synchronization channel, the broadcast channel and/or the broadcast signaling of the strong cell is demodulated, the stability of the user cell search and the cell identification is ensured, and the interference can be mitigated, and the solution is solved. Problems in the prior art.
  • the embodiment of the present invention further provides a CoMP network system, where the network system includes a macro base station, where the macro base station can be the base station described in the foregoing embodiment, and one or more micro base stations, where the micro base station can be the foregoing embodiment. a base station; one or more user equipments, the user equipment being the user equipment described in the foregoing embodiments.
  • the function of the macro base station, the micro base station, and the user equipment is as described in the foregoing embodiment, and details are not described herein again.
  • the user equipment UE can receive system information notified by the base station of the current cell to obtain system information of the neighboring cell. And when the user equipment is switched to or the cell is reselected to the neighboring cell, the user equipment may interfere with the target cell by using the acquired system information of the neighboring cell. Performing suppression, that is, performing interference reduction on interference of a cell-specific reference signal of a strong cell, and/or demodulating interference of a synchronization channel, a broadcast channel, and/or broadcast signaling of a strong cell, and ensuring user cell search and The stability of cell identification and mitigation of interference solves the problems in the prior art.
  • the embodiment of the present invention further provides a computer readable program, wherein the program causes a computer to perform an interference suppression method as described in Embodiment 1, Embodiments 3 to 11 in the base station when the program is executed in a base station .
  • the 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 the interference suppression method as described in Embodiment 1 and Embodiments 3 to 11 in a base station.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute the user equipment in the user equipment as described in Embodiment 2 and Embodiments 3 to 11. Interference suppression method.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the interference suppression method as described in Embodiment 2 and Embodiments 3 to 11 in the user equipment.
  • 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 steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • 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.

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Abstract

一种异构网分层组网中的干扰抑制方法、装置和网络系统。该方法包括:用户设备所属服务小区的基站获取相邻小区、和/或服务小区的相关参数;将所述相关参数通知所述用户设备,所述相关参数用于供所述用户设备利用所述相关参数进行相应的干扰抑制;其中,所述相关参数包括系统信息或者包括系统信息中的部分参数信息;所述系统信息包括与小区标识对应的以下信息中的一种或一种以上:CRS端口数、系统帧号,PHICH配置信息,循环前缀类型信息,下行带宽信息,MBSFN配置信息,以及系统信息块-1中的相关参数。通过本发明实施例,解决了目前由不平衡的小区间切换、选择、重选偏置值引起的问题,并且可简化系统的信令传输复杂度。

Description

异构网分层组网中的干扰抑制方法、 装置和系统 技术领域
本发明涉及通信领域 , 特别涉及一种异构网分层组网中的干扰抑制方法、 装置 和系统。 背景技术
为了改善增强的长期演进 (LTE-A: LTE-Advanced)系统下用户覆盖, 提高系统 的吞吐量和用户的数据传输速率, 引入了异构网 (HetNet, Heterogeneous Network) 节点, 例如, 这些异构网节点包括家庭基站 (HeNB, Home eNodeB), 热点覆盖小区 (Pico-cell) 等, 使用较低的发射功率, 对特定的区域或用户进行覆盖, 组网方式相 对灵活。
图 1是 Macro-Pico场景示意图。 如图 1所示, Pico小区的小区覆盖范围扩展 (C E, Cell Range Expansion)区域的用户将受到 Macro小区的较大干扰。 在宏小区 和微小区 (Macro-Pico cell) 同频部署的场景中, 为了提高系统资源利用率, 令微小 区 (Pico cell) 覆盖更多的用户, 在基于参考信号接收功率 (RSRP, Reference Signal Received Power) 的小区选择方法中, 目前建议引入偏向于微小区的 " RSRP+ bias",, 即用户设备 UE接收微小区( Pico cell )的参考信号接收功率 ( RSRP )小于宏小区( Macro cell) 的偏差值 (bias)之内时, 该用户设备 UE归属微小区。 再配合一定的 elCIC机 制, 可提升系统整体的吞吐量。
在目前的标准化进展中, 为了提升系统的吞吐量, 时域 elCIC机制已写入标准。 具体来说, 将某些子帧配置成几乎空子帧 (ABS, Almost Blank Subframe), 在 ABS 中, 为了减少对其他小区的干扰, 只传输公共参考符号和必要的极少数的控制信道, 其他的资源均空掉, 或者使用降低的功率进行传输。
但是在发明人实现本发明的过程中发现, CRE 导致小区切换 /选择 /重选的偏移 值不平衡, 这种偏移值的不平衡会引入以下问题, 例如, 引起来自强小区的小区专用 参考信号 (CRS, Cell-Specification Reference Signal) 干扰, 这种干扰会影响用户的 无线资源管理(RRM, Radio Resource Management)测量,信道状态信息(CSI, channel state information)测量, 数据解调, 同步信道解调, 广播信道解调和控制信道解调等; 并且这种偏移值的不平衡会导致强小区的广播信道 (PBCH ), 主 /辅同步信道
(PSS/SSS), 寻呼 (Paging) 和系统信息块 -1 ( SIB-1 , System Information Block- 1 ) 等的传输对邻区 Pico cell的相应信道产生强干扰,使得用户对 Pico cell的这些信道的 接收和解调的性能下降, 影响用户小区搜索和识别的稳定性, 体现在用户开机初始接 入, 移动性管理, 和小区广播信息等情况。
应该注意,上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、 完整的说明, 并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发 明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。 发明内容
本发明实施例的目的在于提供一种异构网分层组网中的干扰抑制方法、装置和系 统, 对来自强小区的干扰进行抑制, 可解决由不平衡的小区间切换、 选择、 重选偏置 值引起的问题, 并且可简化系统的信令传输复杂度。
根据本发明实施例的一个方面提供了一种异构网分层组网中的干扰抑制方法,该 方法包括:
用户设备所属服务小区的基站获取相邻小区、 和 /或服务小区的相关参数; 将该相关参数通知该用户设备,该相关参数用于供该用户设备利用该相关参数进 行相应的干扰抑制;
其中, 该相关参数包括系统信息或者包括系统信息中的部分参数信息; 该系统信 息包括与小区标识对应的以下信息中的一种或一种以上: CRS端口数、系统帧号, PHICH 配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1 中的相关参数。
根据本发明实施例的另一个方面提供了一种异构网分层组网中的干扰抑制方法, 该方法包括:
用户设备接收所属服务小区的基站通知的相邻小区和 /或该服务小区的相关参 数; 该相关参数包括系统信息或者包括系统信息中的部分参数信息; 该系统信息包括 与小区标识对应的以下信息中的一种或一种以上:
CRS端口数、 系统帧号, PHICH配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1中的相关参数。 根据本发明实施例的另一个方面提供了一种基站, 该基站包括: 第一获取单元, 该第一获取单元被配置用于获取相邻小区、 和 /或服务小区的相 关参数;
第一通知单元, 该第一通知单元被配置用于将该相关参数通知该用户设备, 使该 用户设备根据该相关参数进行相应的干扰抑制;
其中, 该相关参数包括系统信息或者包括系统信息中的部分参数信息; 该系统信 息包括与小区标识对应的以下信息中的一种或一种以上: CRS端口数、系统帧号, PHICH 配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1 中的相关参数。
根据本发明实施例的另一个方面提供了一种用户设备, 该用户设备包括: 第二接收单元,该第二接收单元被配置用于接收所属服务小区的基站通知的相邻 小区和 /或该服务小区的相关参数;
该相关参数包括系统信息或者包括系统信息中的部分参数信息;该系统信息包括 与小区标识对应的以下信息中的一种或一种以上: CRS端口数、 系统帧号, PHICH配 置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1中 的相关参数。
根据本发明实施例的另一个方面提供了一种网络系统, 所述网络系统包括: 宏基站, 所述宏基站为上述基站;
一个或一个以上微基站, 所述微基站为上述基站;
一个或一个以上用户设备, 所述用户设备为上述用户设备。
根据本发明实施例的另一个方面提供了一种计算机可读程序,其中当在基站中执 行所述程序时,所述程序使得计算机在所述基站中执行上述的异构网分层组网中的干 扰抑制方法。
根据本发明实施例的另一个方面提供了一种存储有计算机可读程序的存储介质, 其中所述计算机可读程序使得计算机在基站中执行上述的异构网分层组网中的干扰 抑制方法。
根据本发明实施例的另一个方面提供了一种计算机可读程序,其中当在用户设备 中执行所述程序时,所述程序使得计算机在所述用户设备中执行上述的异构网分层组 网中的干扰抑制方法。 根据本发明实施例的另一个方面提供了一种存储有计算机可读程序的存储介质, 其中所述计算机可读程序使得计算机在用户设备中执行上述的异构网分层组网中的 干扰抑制方法。
本发明实施例的有益效果在于: 通过基站向用户设备通知相邻小区和 /或服务小 区的用于进行干扰抑制的相关参数, 使得用户设备获得该相邻小区的相关参数, 这样 该用户设备可利用该相关参数进行相应的干扰抑制,解决了目前由不平衡的小区间切 换、 选择、 重选偏置值引起的问题, 并且可简化系统的信令传输复杂度。
参照后文的说明和附图, 详细公开了本发明的特定实施方式, 指明了本发明的原 理可以被采用的方式。应该理解, 本发明的实施方式在范围上并不因而受到限制。在 所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用, 与其它实施方式中的特征相组合, 或替代其它实施方式中的 特征。
应该强调, 术语 "包括 /包含"在本文使用时指特征、 整件、 步骤或组件的存在, 但并不排除一个或更多个其它特征、 整件、 步骤或组件的存在或附加。 附图说明
从以下结合附图的详细描述中, 本发明实施例的上述以及其他目的、 特征和优 点将变得更加显而易见, 在附图中:
图 1是 Macro-Pico场景示意图;
图 2A是本发明实施例 1的异构网分层组网中的干扰抑制方法流程图; 图 2B到 2D是本发明实施例 1的信令结构示意图;
图 3是本发明实施例 2的异构网分层组网中的干扰抑制方法流程图;
图 4A是本发明实施例 3的场景示意图;
图 4B是本发明实施例 3的干扰抑制方法流程图;
图 5是本发明实施例 4的干扰抑制方法流程图;
图 6是本发明实施例 5的干扰抑制方法流程图;
图 7A是本发明实施例 6的场景示意图;
图 7B是本发明实施例 6的干扰抑制方法流程图; 图 8是本发明实施例 7的干扰抑制方法流程图;
图 9是本发明实施例 7的干扰抑制方法流程图;
图 10是本发明实施例 9的干扰方法流程图;
图 11A是本发明实施例 10的场景示意图;
图 11B是本发明实施例 10的干扰抑制方法流程图;
图 12是本发明实施例 11的干扰抑制方法流程图;
图 13是本发明实施例 12的基站构成示意图;
图 14是本发明实施例 13的基站构成示意图;
图 15是本发明实施例 15的用户设备构成示意图。 具体实施方式
下面结合附图对本发明的各种实施方式进行说明。这些实施方式只是示例性的, 不是对本发明的限制。为了使本领域的技术人员能够容易地理解本发明的原理和实施 方式, 本发明的实施方式以 LTE-A异构网的分层组网中的干扰抑制为例进行说明, 但可以理解, 本发明并不限于上述系统, 对于涉及干扰抑制的其他系统均适用。
在本发明实施例中, 对于异构网 (HetNet), 包括宏小区基站、 一个或一个以上 微小区的基站。 其中, 每个基站都可获取其相邻小区的相关参数, 并且将获取的相邻 小区和 /或本小区的相关参数通知所属小区的用户设备, 使得所属该小区的用户设备 可接收该相关参数, 以便在该用户设备移动到该相邻小区时, 该用户设备可利用获得 的该相邻小区的相关参数进行相应的干扰抑制,或者在该用户设备处于本小区时根据 本小区的相关参数进行本小区的干扰抑制。其中, 该相关参数可为系统信息或者包括 系统信息中的部分参数信息;该系统信息包括与小区标识对应的以下信息中的一种或 一种以上: CRS端口数、 系统帧号, PHICH配置信息, 循环前缀类型信息, 下行带宽 信息, 数据区域包含 CRS的子帧 (多媒体广播多播服务单频网 (MBSFN, Multicast Broadcast Single Frequency Network) 子帧的配置信息), 以及系统信息块 _1 (SIB-1 ) 中的相关参数。
以下结合附图对本发明实施例的干扰抑制方法进行说明。
图 2是本发明实施例 1的异构网分层组网中的干扰抑制方法。如图 2所示, 该方 法包括: 步骤 201, 用户设备所属服务小区的基站获取相邻小区、和 /或服务小区的相关参 数;
在本实施例中, 该基站可为宏基站, 这样, 该宏基站可获取该一个或一个以上相 邻的微小区的系统信息; 此外, 该基站也可为微基站;
在本实施例中, 该基站可从预先获取的该相邻小区、 和 /或该服务小区的系统信 息中选择该相关参数; 其中, 该相关参数可为全部系统信息或为系统信息的子集; 其中, 该系统信息可包括与小区标识对应的以下信息中的一种或一种以上: CRS 端口数、 系统帧号 (SFN, System Frame Number) , 混合自动重传请求指示信道配置 ( PHICH configuration)信息,循环前缀类型(Cyclic Prefix type)信息,下行带宽(DL bandwidth) 信息, 数据区域包含 CRS的子帧 (MBSF子帧的配置信息), 以及系统信 息块 -1 ( SIB-1 ) 中的相关参数; 但该系统信息不限于上述信息, 可根据需要包括其 他信息;
该循环前缀类型信息可包括循环前缀长度信息, 即为常规的长度、或者为加长的 长度的循环前缀。
步骤 202, 将该相关参数通知该用户设备, 使该用户设备根据该相关参数进行相 应的干扰抑制;
在本实施例中, 可通过广播的方式通知该用户设备, 或者通过用户专用信令的方 式发给某个或某些用户设备;
在本实施例中, 该干扰是由微小区的小区覆盖范围扩展(CRE)导致的不平衡的 小区间切换、 选择、 重选偏置值引起的问题, 该干扰可包括: 来自强小区的小区专用 参考信号(CRS )的干扰、 以及来自强小区的同步信道、广播信道和 /或广播信令的干 扰, 其中同步信道表示主同步信号 /辅同步信号 ((PSS, Primary Synchronization Signal) I ( SSS , Secondary Synchronization Signal) ) , 广播信道包括了物理广播信道(PBCH, Physical Broadcast Channel) ,广播信令表示了系统信息块 -x ( SIB-x, System Information Block-x) 和寻呼 (Paging) 的传输。
这样, 该用户设备可根据获得的相关参数进行相应的干扰抑制, 即对来自强小区 的 CRS的干扰进行干扰减轻, 以使数据 /控制信道的解调增强, 和 /或对来自强小区的 广播信道、 广播信令和 /或同步信道的干扰进行解调增强, 以减轻该干扰。
在本实施例中, 该相关参数可以以列表的数据结构方式表示, 如图 2B至 2D所 不。
如图 2B所示, 小区标识 (Cell ID) 列表中包含小区标识以及对应每个小区标识 的相关参数, 例如, 小区标识从 #0~#N, 对应小区 ID#0的相关参数包括: CRS的端 口数量、 MBSFN配置信息、 CRS带宽等信息,对应其他小区标识的信息与上述类型, 其可为获得的系统信息, 也可为系统信息的一部分, 并且每个小区标识对应的相关参 数可相同, 或不同, 或部分相同, 可根据网络实际情况确定参数的内容。 另外, 上述 小区标识可包括当前归属小区的标识, 也可包括相邻小区的标识。
除了采用图 2B所示的列表外, 还可采用图 2C和 2D所示的列表。
由上述实施例可知, 网络侧的基站可向用户设备通知相邻小区和 /或服务小区的 用于进行干扰抑制的相关参数, 使得用户设备获得该相邻小区的相关参数, 并利用该 相关参数进行相应的干扰抑制, 例如, 对来自强小区的 CRS的干扰进行干扰减轻, 以使数据 /控制信道的解调增强, 和 /或对来自强小区的广播信道、 广播信令和 /或同步 信道的干扰进行解调增强, 以减轻该干扰, 即可根据该相关参数进行小区识别和小区 检测, 根据获得的该小区的相关参数解调该小区的其他控制信令 (如 PDCCH, SIB-1 , Paging 等) 和数据业务, 从而解决了目前由不平衡的小区间切换、 选择、 重选偏置 值引起的问题, 对干扰进行了抑制, 并且可简化系统的信令传输复杂度。
在本实施例中, 在步骤 201中, 当该相关参数为系统信息时, 步骤 201可通过以 下方式获取该相邻小区的系统信息; 但不限于下述方式, 还可采用其他方式来获得。
对于当前归属小区为强小区, 获取相邻小区的系统信息采用如下方式: 宏基站可收集相邻的微小区 (Pico cell) 的系统信息, 以获取该相邻的微小区的 系统信息;
例如, 网络侧的操作、 管理和维护 (OAM, Operation Administration and Maintenance)功能实体主动下发该微小区的系统信息, 该宏基站可接收该 OAM下发 的该微小区的系统信息, 以获取该微小区的系统信息;
例如, 该宏基站可向网络侧的 OAM发送下发微小区的系统信息的请求, 并接收 该 OAM根据该请求下发的微小区的系统信息;
另外,该宏基站还可通过与相邻的微小区的基站进行交互的方式来获取该相邻的 微小区的系统信息,即该宏基站向相邻的微小区的基站发送获取该微小区的系统信息 的请求, 该微小区的基站接收到该请求后, 将该微小区的系统信息发送到该宏基站; 对于当前归属小区为微小区的情况, 获取相邻小区的系统信息采用如下方式: 微基站获取相邻小区的系统信息的方式与该宏基站获取该相邻小区的系统信息 的方式类似, 例如, 网络侧的操作、 管理和维护(OAM, Operation Administration and Maintenance) 功能实体主动下发该微基站相邻小区的系统信息, 该微基站可接收该 OAM下发的该相邻小区的系统信息; 例如, 该微基站可向网络侧的 OAM发送下发 获取相邻小区的系统信息的请求, 并接收该 OAM根据该请求下发的相邻小区的系统 信息; 另外, 该微基站还可通过与相邻小区的基站进行交互的方式来获取该相邻小区 的系统信息, 与宏基站的情况类似, 此处不再赘述。
另外, 对于当前归属小区的系统信息, 可通过接收 OAM功能实体下发的当前归 属小区的信息的方式来获得。
在本实施例中, 在步骤 201之前, 该方法还包括: 获取该服务小区和该相邻小区 之间, 或者获取该服务小区、 该相邻小区以及该用户设备之间的互干扰关系。 并且, 上述步骤 201可具体包括: 该基站根据获取的该互干扰关系来选择该相关参数。
在本实施例中,该互干扰关系指:异构网络中的低功率节点小区(一般指微小区, 或者是小区切换, 选择, 重选偏置值相对大的微小区)中的归属用户会受到高功率节 点 (一般指强小区或者小区切换, 选择, 重选偏置值相对小的微小区) 的干扰, 即受 强小区的 CRS干扰、 或者受强小区同步信道、 广播信道和 /或广播信令的干扰。
具体地, 因为来自强小区 (宏小区或产生强干扰的微小区) 的干扰, 归属于弱小 区中的用户对服务小区的数据信道、 控制信道、 广播信道、 和 /或同步信道等的解调 和检测, 还有基于参考符号的信道状态测量无线资源管理测量造成性能的下降, 甚至 是无法工作; 或者因为来自于强小区的信号强度, 强小区中的归属用户对弱小区的广 播信道、 广播信令和 /或同步信道等的解调和检测, 还有基于参考符号的无线资源管 理测量等造成性能的下降, 甚至是无法工作。
在上述实施例中, 该强小区是指信号相对强的小区, 可以为宏小区或者为 "产生 强干扰的微小区"。
例如, 当两个微小区 A和 B互为邻区, 当该两个微小区的个性偏移值(切换, 小 区选择,重选)的选取,导致在微小区 A的边缘用户会受到微小区 B的强干扰的时候, 则该微小区 B是 "产生强干扰的微小区"。
在上述实施例中, 该弱小区是指受强小区干扰的微小区。 例如, 当两个微小区 A和 B互为邻区, 当两个微小区的个性偏移值(切换, 小区 选择, 重选) 的选取, 导致用户设备在检测来自于微小区 A的信号时, 受到来自微小 区 B的强干扰, 我们称微小区 A是个弱小区。
在本实施例中,该基站可通过接收网络侧 0AM下发的该服务小区和相邻小区之间 的互干扰关系来获取该互干扰关系;
此外, 还可通过基站间信息交互、或者根据该用户设备上报的测量结果来获取该 服务小区、该相邻小区以及该用户设备之间的互干扰关系, 这样情况下获得的互干扰 关系更为精确。
其中,该用户设备 UE上报的测量结果可包括参考信号接收功率 (RSRP,ReferenCe Signal Receiving Power) 和参考信号接收质量 (RSRQ, Reference Signal Receiving Quality) 等无线资源管理 (RRM, Radio Resource Management) 测量值。
这样, 通过获得的该互干扰关系可确定干扰类型, 即是受强小区的小区专用参考 信号(CRS) 的干扰、 和 /或受强小区的同步信道、 广播信道、 和 /或广播信令的干扰, 从而根据该互干扰关系选择相应的相关参数。
在本发明的一个实施例中, 该基站可通过显式的方式来指示干扰类型。
在这种情况下, 在该基站获取该互干扰关系后, 该方法还包括: 在该相关参数中 添加用于指示干扰类型的指示信息; 并且该基站通知包含该指示信息的相关参数。
在本实施例中, 该指示信息可为指示该相邻小区和 /或服务小区受强小区的小区 专用参考信号 (CRS ) 的干扰、 还是受强小区的同步信道、 广播信道、 和 /或广播信 令的干扰、 还是同时受到上述两种干扰。 具体地, 该指示信息可为指示该相邻小区和 /或服务小区为强干扰小区和 /或受干扰的弱小区的信息。 其中, "强干扰小区"表示 干扰类型为来自强小区的 CRS干扰, 对应 "进行 CRS干扰减轻", "受干扰的弱小区" 表示干扰类型为来自强小区的同步信道、广播信道、和 /或广播信令的干扰,对应"进 行小区识别和小区检测", 即进行解调增强。 如果两种干扰同时存在, 则同时进行干 扰减轻和解调增强。这样, 该用户设备接收到该相关参数后, 可根据该指示信息确定 进行哪种干扰抑制。
在本实施例中, 该指示信息可用 lbit的参数指示, 例如, 该 lbit为 "0" 时, 表示干扰类型为强小区的 CRS干扰; 该 lbit为 " 1 "时, 表示干扰类型为强小区的同 步信道、 广播信道、 和 /或广播信令的干扰。 反之亦然。 在本实施例中, 该指示信息的数量与小区标识的数量一致, 分别用于指示每个小 区的干扰类型,如图 2B至 2D所示的列表中,可针对每个小区标识添加一个指示信息, 指示每个小区标识对应小区的干扰类型; 或者, 该指示信息为一个, 统一指示所有小 区的干扰类型, 这种情况下, 在小区列表中的各个小区标识对应的小区的干扰类型一 样时, 可通过一个指示信息来指示干扰类型, 这样可节约信令开销。
在本发明的另一个实施例中, 该基站可通过隐式的方式来指示干扰类型。
在这种情况下, 在获取该互干扰关系后, 该方法还包括: 根据该互干扰关系, 在 选择的该相关参数中包含预定的用于指示干扰类型的信息,使得该用户设备根据该预 定的信息进行相应的干扰抑制。
例如, 如果确定的干扰类型为强小区的 CRS 干扰, 则根据预定的规则, 将参数
MBSFN配置信息包含在该相关参数中, 使用该 MBSFN配置信息指示干扰类型为 CRS干 扰, 相应地, 用户设备可根据该 MBSFN配置信息确定属于 CRS干扰, 从而进行相应的 CRS 干扰抑制, 即干扰减轻, 以使控制信道 /数据信道的解调增强, 当然不限于上述 参数, 还可采用其他参数来指示干扰类型。
例如, 如果确定的干扰类型为强小区的同步信道、 广播信道、 和 /或广播信令的 干扰, 则根据预定的规则, 将参数 CP类型包含在该相关参数中, 使用该 CP类型指示 干扰类型, 相应地, 该用户设备可根据该 CP类型信息确定干扰类型, 从而进行相应 的干扰抑制, 即解调增强, 增强对弱小区的小区识别和小区检测, 当然不限于使用上 述参数来指示, 还可采用其他参数, 如 raiCH配置信息等指示干扰类型。
在本发明实施例中, 基站也可不进行互干扰关系的判定, 也不指示干扰类型, 而 是由用户侧自行判断。
在本实施例中, 该基站为宏基站时, 该方法还包括: 根据该相邻小区上报的测 量结果决定将该用户设备切换至目标相邻小区,还可将该目标相邻小区的标识信息通 知该用户设备 UE;
其中, 该测量结果可包括相邻小区上报的参考信号接收功率(RSRP, Reference
Signal Receiving Power) 和参考信号接收质量 (RSRQ, Reference Signal Receiving Quality) 等无线资源管理 (RRM, Radio Resource Management) 测量值。
这样, 在该 UE获得该目标相邻小区的标识信息时, 可根据该标识信息对应的小 区的系统信息来解调该目标相邻小区的其他控制信令和相应的业务数据, 或者进行 CRS干扰抑制。
在本实施例中, 在该一个或一个以上相邻小区的系统信息变更的情况下, 该基 站还可接收该相邻小区的基站上报的变化的系统信息;将变化的系统信息通知该用户 设备, 以使用户设备 UE及时获得变化的微小区的系统信息, 保证对该小区的其他控 制信令 (如 PDCCH, SIB-1 , Paging等) 和业务数据的正确解调; 以及在该用户设备 受到强小区的 CRS干扰时, 保证该用户设备进行干扰抑制。
图 3是本发明实施例 2的异构网分层组网中的干扰抑制方法流程图。 如图 3所 示, 该方法包括:
步骤 301, 用户设备接收所属服务小区的基站通知的相邻小区和 /或该服务小区 的相关参数;
在本实施例中, 该相关参数与实施例 1中类似, 此处不再赘述。
在本实施例中, 在步骤 301中, 在该用户设备 UE当前所属服务小区为宏小区时, 该 UE设备可接收该宏基站通知的相邻小区和 /或该宏小区的相关参数;在该用户设备 UE当前归属小区为微小区时, 该用户设备 UE可接收该微基站通知的相邻小区和 /或 该微小区的相关参数。
在本实施例中, 该相关参数的数据结构可采用图 2B至 2D的任意一种。
在本实施例中, 该方法还可包括: 该用户设备 UE将接收到的该相关参数进行储 存。 其中可将相邻小区标识信息和 /或服务小区的标识信息、 与该小区的相关参数对 应储存。 此外, 当相邻小区的系统信息变化时, 该 UE接收到的相关参数还包括该相 邻小区变化的系统信息。
在本实施例中, 在该当前所属服务小区的基站为宏基站时, 在步骤 301之前, 该 方法还包括: 该用户设备同步到该当前所属服务小区, 与该当前所属服务小区的基站 建立连接 (见步骤 300)。 该步骤 300为可选步骤。
例如,在本实施例中,当该用户设备 UE移动到某一个相邻微小区(如使用 Cel l— B 表示该某一个相邻微小区)时, 且该用户设备 UE没有预先接收到该 Cel l— B的相关参 数。 在这种情况下, 该用户设备 UE首先同步到信号强的小区 (例如宏小区或产生强 干扰的微小区), 与该信号强的小区的基站建立连接, 从该小区的基站获取该 Cel l— B 的相关参数。
在这种情况下, 在步骤 301之前执行步骤 300, 即该用户设备同步到信号强的 小区, 与该信号强的小区的基站建立连接; 接收该信号强的小区的基站通知的包括该 Cel l— B的基站的相关参数。 这样, 在该用户设备 UE切换到该 Cel l— B后, 该用户设 备 UE可根据获得该 Cel l— B的相关参数来进行相应的干扰抑制。
在本实施例中, 在步骤 301之后, 该方法还包括: 利用接收到的该相关参数进行 相应的干扰抑制 (见步骤 302)。 这样, 由于该用户设备 UE预先接收到该相邻小区的 系统信息, 因此, 解决了现有技术中存在的问题。 该步骤 302为可选步骤, 在发生了 上述干扰的情况下才执行该步骤 302。
在本实施例中, 当基站侧显示指示干扰类型时, 该相关参数还包括用于指示干扰 类型的指示信息; 并且在步骤 302之前, 该方法还包括: 该用户设备根据该指示信息 确定干扰类型。
在本实施例中, 当基站侧隐式指示干扰类型时, 该相关参数中包含预定的用于指 示干扰类型的信息; 并且在步骤 302之前, 该方法还包括: 该用户设备根据该预定的 用于指示干扰类型的信息确定干扰类型。
在本实施例中, 当基站侧不指示干扰类型时, 在步骤 302之前, 该方法还包括: 该用户设备可根据基站通知的相关参数、 以及对该服务小区和 /或相邻小区的 CRS或 者其他信号的测量; 或者根据对该服务小区和 /或相邻小区的 CRS或者其他信号的测 量自行决定干扰类型。
在本实施例中, 该方法还包括: 该用户设备向该基站上报该服务小区和相邻小区 的测量结果, 使得该基站根据上报的测量结果得到该服务小区、相邻小区和用户设备 之间的互干扰关系。
下面结合具体的场景对本发明实施例的干扰抑制方法进行详细说明。在本实施例 中, 假设在该异构网络中信号强的小区为强小区, 并且以该相关参数为系统信息、宏 小区广播该相邻小区 (微小区) 的系统信息为例进行说明。
图 4A是本发明实施例 3的场景示意图, 图 4B是本发明实施例 3的干扰抑制方 法流程图。 以连接状态的用户设备 UE归属于宏小区 (Macro cel l ) 的场景, 并且移 动到微小区的 CRE区域为例进行说明。
如图 4B所示, 该方法包括:
步骤 401, 宏基站获取相邻的微小区的系统信息;
在本实施例中, 该微小区的系统信息如实施例 1至 2所述, 此处不再赘述; 此 夕卜, 该宏基站收集微小区的系统信息的方法如实施例 1至 2所述, 此处不再赘述。 步骤 402, 该宏基站将获取的微小区的系统信息通知用户设备;
在本实施例中, 该宏基站可将该系统信息包含在宏小区的 SIB4中进行广播, 这 样可简化系统的信令传输的复杂度; 此外, 还可以其他的方式发送该微小区的系统信 息, 如寻呼等方式, 可视具体情况来定;
此外, 还可采用用户专用信令的方式通知某个用户或某些用户;
在本实施例中, 该相关参数可采用图 2B至 2D的数据结构。
步骤 403, 归属于该宏小区的用户设备 UE接收该宏基站通知的系统信息, 并获 取该微小区的系统信息;
在本实施例中,该 UE接收该宏基站广播的 SIB4,从中读取该微小区的系统信息。 步骤 404, 将该微小区的系统信息进行储存;
在本实施例中, 可将该微小区的小区标识信息与该微小区的系统信息对应储存; 这样, 当该用户设备 UE从该宏小区切换到该微小区的 CRE时, 由于该用户设备 已经获得了该宏基站通知的该微小区的相关参数, 因此, 该用户设备 UE可根据该微 小区的小区标识信息找到相应的该微小区的系统信息,并利用该微小区的系统信息对 对来自宏小区的 CRS进行干扰减轻,即对该微小区的控制信令和相应的业务数据进行 解调, 或者抑制宏小区的同步信道、 同步信令和 /或广播信息的干扰, 即对小区检测 和小区识别。
步骤 405, 在该 UE移动到相该小区的 CRE区域时, 该宏基站根据该用户设备 UE 上报的测量结果, 决定将该 UE切换至该微小区, 并通知该 UE相应的小区标识信息; 在本实施例中, 该用户设备 UE上报的测量结果可包括 RSRP和 RSRQ等 RRM测量 值, 该决定切换的目标小区的方式与现有技术类似, 此处不再赘述。
步骤 406, 该用户设备 UE接收该微小区的标识信息, 从获取的系统信息中查找 该微小区的系统信息。
步骤 407, 该用户设备 UE确定该微小区的干扰类型;
在本实施例中, 该用户设备可自行确定该微小区的干扰类型的方法如实施例 2 所述, 此处不再赘述, 在本实施例中确定该干扰类型为受宏小区同步信道、 广播信道 和 /或广播信息的干扰, 即该微小区为受干扰的弱小区。
步骤 408,该用户设备利用该微小区的系统信息对对受宏小区同步信道、广播信 道和 /或广播信息的干扰进行抑制, 即该微小区进行小区识别和小区检测; 其中, 可利用该系统信息中如下参数中的一个或几个, 如 CRS端口数、 系统帧 号 (SFN, System Frame Number ) , 混合自动重传请求指示信道配置 ( PHICH configuration)信息,循环前缀类型( Cyclic Prefix type )信息,下行带宽( DL bandwidth) 信息, 以及系统信息块 -1 ( SIB-1 ) 中的相关参数。
在上述实施例中, 如果该用户设备自行确定该干扰类型为受宏小区的 CRS干扰, 则可利用该系统信息中的参数,如 CRS端口数、 MBSFN配置信息等进行 CRS干扰抑制。
由上述实施例可知, 在处于连接状态的用户设备 UE归属于宏小区时, 可从宏基 站获取相邻微小区的系统信息, 在该 UE切换到该微小区的 CRE区域后, 可确定该小 区的干扰类型,并根据干扰类型利用获得的该微小区的系统信息对该微小区受到的干 扰进行抑制, 即利用该微小区的系统信息进行小区检测和小区识别, 从而增强对弱小 区的小区识别和检测解决了现有技术中接收质量不佳导致的问题,并且可简化系统的 信令传输负载度。
上述实施例 3是以用户设备自行确定干扰类型, 基站侧不指示干扰类型。 以下参 考图 4A以基站侧以显示的方式指示干扰类型为例进行说明。
图 5是本发明实施例 4的干扰抑制方法流程图。 以连接状态的用户设备 UE归属 于宏小区 (Macro cel l ) 的场景, 并且移动到微小区的 CRE区域为例进行说明。
如图 5所示, 该方法包括:
步骤 501, 宏基站获取相邻的微小区的系统信息;
在本实施例中, 该相邻微小区的系统信息如实施例 1至 2所述, 此处不再赘述; 此外, 该宏基站收集该相邻微小区的系统信息的方法如实施例 1至 2所述, 此处不再 赘述;
该相邻微小区的数量为 1个或 1个以上。
步骤 502, 该宏基站获取该宏小区和相邻微小区之间, 或者该宏小区、 相邻微小 区以及该用户设备之间的互干扰关系;
在本实施例中, 获取该互干扰关系的方法如实施例 1所述, 此处不再赘述。 步骤 503, 该宏基站根据获取的该互干扰关系来选择该相关参数;
在本实施例中, 若该宏基站根据该互干扰关系确定该微小区的干扰类型为 "受干 扰的弱小区", 则该宏基站可从系统信息中为该微小区选择相关参数, 如以下参数中 的一个或几个, 如 CRS端口数、 系统帧号 (SFN, System Frame Number), 混合自动 重传请求指示信道配置(PHICH configuration)信息,循环前缀类型(Cycl ic Prefix type ) 信息, 下行带宽 (DL bandwidth ) 信息, 以及系统信息块 _1 ( SIB-1 ) 中的相 关参数。
步骤 504, 该宏基站将指示干扰类型的指示信息添加到该相关参数中; 在本实施例中, 如果 lbit信令 " 1 "表示 "受干扰的弱小区", 则将 " 1 "添加到 相关参数中。
步骤 505, 该宏基站将获取的微小区的相关参数通知用户设备;
在本实施例中, 该宏基站可将该相关参数包含在宏小区的 SIB4中进行广播, 这 样可简化系统的信令传输的复杂度; 此外, 还可以其他的方式广播该微小区的系统信 息, 如单独广播等方式, 可视具体情况来定;
此外, 还可采用用户专用信令的方式通知某个用户或某些用户。
步骤 506, 归属于该宏小区的用户设备 UE接收该宏基站通知的相关参数, 并获 取该相邻微小区的相关参数。
步骤 507, 将该相邻微小区的相关参数进行储存;
在本实施例中,可将该相邻微小区的小区标识信息与该微小区的相关参数和指示 信息对应储存;
这样, 当该用户设备 UE切换到某一个目标微小区时, 该用户设备 UE可根据该目 标微小区的小区标识信息找到相应的该目标微小区的相关参数和指示信息,并利用该 目标微小区的指示信息和相关参数对该目标微小区进行相应的干扰抑制。
步骤 508, 在该 UE移动到相邻微小区的 CRE区域时, 该宏基站根据该用户设备 UE上报的测量结果, 决定将该 UE切换至该相邻微小区, 并通知该 UE相应的目标小 区标识信息;
在本实施例中, 该用户设备 UE上报的测量结果可包括 RSRP和 RSRQ等 RRM测量 值, 该决定切换的目标小区的方式与现有技术类似, 此处不再赘述。
步骤 509, 该用户设备 UE接收该目标小区的标识信息, 从获取的微小区的系统 信息中查找到该目标微小区的相关参数。
步骤 510, 该用户设备 UE确定该微小区的干扰类型;
在本实施例中, 该用户设备可根据该相关参数中的指示信息 " 1 "确定该微小区 的干扰类型为受宏小区的同步信道、 广播信道和 /或广播信令的干扰, 即该微小区为 受干扰的弱小区。
步骤 511, 该用户设备利用该目标微小区的系统信息对该目标微小区受到的干扰 进行抑制;
在本实施例中, 对受宏小区同步信道、广播信道和 /或广播信息的干扰进行抑制, 即利用该系统信息对该微小区进行小区检测和小区识别, 以增强对弱小区的小区识别 和小区检测。
由上述实施例可知, 在处于连接状态的用户设备 UE归属于宏小区时, 可从宏基 站获取相邻微小区的相关信息, 该相关信息包含指示干扰类型的信息; 在该 UE切换 到目标微小区后, 可根据该指示信息确定该小区的干扰类型, 并根据干扰类型利用获 得的该目标微小区的相关参数对该微小区受到的干扰进行抑制,解决了现有技术中接 收质量不佳导致的问题, 并且可简化系统的信令传输负载度。
基于上述实施例 4, 以下参考图 4A 以基站侧以隐式的方式指示干扰类型为例进 行说明。
图 6是本发明实施例 5的干扰抑制方法流程图。 以连接状态的用户设备 UE归属 于强小区 (Macro cel l ) 的场景, 并且移动到微小区的 CRE区域为例进行说明。
如图 6所示, 该方法包括:
步骤 601, 宏基站获取相邻的微小区的系统信息;
在本实施例中, 该相邻微小区的系统信息如实施例 1至 2所述, 此处不再赘述; 此外, 该宏基站收集该相邻微小区的系统信息的方法如实施例 1至 2所述, 此处不再 赘述;
该相邻微小区的数量为 1个或 1个以上。
步骤 602, 该宏基站获取该宏小区和相邻微小区之间, 或者该宏小区、 相邻微小 区以及该用户设备之间的互干扰关系;
在本实施例中, 获取该互干扰关系的方法如实施例 1所述, 此处不再赘述。 步骤 603, 该宏基站根据获取的该互干扰关系来选择该相关参数;
在本实施例中, 若该宏基站根据该互干扰关系确定该微小区的干扰类型为 "受干 扰的弱小区", 则该宏基站可从系统信息中为该微小区选择相关参数, 如以下参数中 的一个或几个, 如 CRS端口数、 系统帧号 ( SFN, System Frame Number), 混合自动 重传请求指示信道配置(PHICH configuration)信息,循环前缀类型(Cycl ic Prefix type ) 信息, 下行带宽 (DL bandwidth ) 信息, 以及系统信息块 _1 ( SIB-1 ) 中的相 关参数;
并且在本实施例中, 在选择的相关参数中, 应包含预定的指示干扰类型的信息, 如下行带宽, 表示干扰类型为 "受干扰的弱小区"。
步骤 604, 该宏基站将获取的微小区的相关参数通知用户设备。
步骤 605, 归属于该宏小区的用户设备 UE接收该宏基站通知的相关参数, 并获 取该相邻微小区的相关参数。
步骤 606, 将该相邻微小区的相关参数进行储存;
在本实施例中,可将该相邻微小区的小区标识信息与该微小区的相关参数和指示 信息对应储存;
这样, 当该用户设备 UE切换到某一个目标微小区时, 该用户设备 UE可根据该目 标微小区的小区标识信息找到相应的该目标微小区的相关信息和指示信息,并利用该 目标微小区的指示信息和相关信息对该目标微小区的控制信令和相应的干扰抑制。
步骤 607, 在该 UE移动到相邻微小区的 CRE区域时, 该宏基站根据该用户设备
UE上报的测量结果, 决定将该 UE切换至该相邻微小区, 并通知该 UE相应的目标小 区标识信息;
在本实施例中, 该用户设备 UE上报的测量结果可包括 RSRP和 RSRQ等 RRM测量 值, 该决定切换的目标小区的方式与现有技术类似, 此处不再赘述。
步骤 608, 该用户设备 UE接收该目标小区的标识信息, 从获取的微小区的系统 信息中查找到该目标微小区的相关参数。
步骤 609, 该用户设备 UE确定该微小区的干扰类型;
在本实施例中, 该用户设备可根据该相关参数中的指示干扰类型的信息, 如 "下 行带宽"确定该微小区的干扰类型为受宏小区的同步信道、 广播信道和 /或广播信令 的干扰, 即该微小区为受干扰的弱小区。
步骤 610, 该用户设备利用该目标微小区的相关参数对该目标微小区受到的干扰 进行抑制。
由上述实施例可知, 在处于连接状态的用户设备 UE归属于宏小区时, 可从宏基 站获取相邻微小区的相关信息, 该相关信息包含指示干扰类型的信息; 在该 UE切换 到目标微小区后, 可根据该信息确定该小区的干扰类型, 并根据干扰类型利用获得的 该目标微小区的相关参数对该目标微小区受到的干扰进行抑制,即进行小区识别和小 区检测, 解决了现有技术中存在的问题, 并且可简化系统的信令传输负载度。
上述是以该相邻微小区的干扰类型为 "受干扰的弱小区"为例进行的说明, 在这 种情况下, 该指示信息可使用统一的 lbit来指示, 也可针对每个微小区分别使用 1 个 lbit信令来指示。对于干扰类型为"强干扰的小区", 与上述类似,此处不再赘述。
此外, 上述是以强小区为宏小区为例进行的说明, 此外强小区也可为产生强干扰 的微小区。 对于这种情况与宏小区类似, 此处不再赘述。
此外, 对于该相邻微小区为一个以上的情况, 其中有些相邻微小区的干扰类型可 为 "受干扰的弱小区", 而有些为 "强干扰的小区", 在这种情况下, 需针对每个微小 区分别使用 lbit的信令来指示干扰类型。
此外, 在基站侧也可不只是该干扰类型, 而在用户设备侧, 该用户设备自行判断 其干扰类型, 与实施例 3类似, 此处不再赘述。
图 7A是本发明实施例 6的场景示意图,图 7B是本发明实施例 6的干扰抑制方法 流程图。 以连接状态的用户设备 UE归属于微小区 (Macro cell ) 的场景, 并在该微 小区的 CRE区域且受到来自宏小区的 CRS的干扰为例进行说明, 其中该 UE判断干扰 类型。
如图 7B所示, 该方法包括:
步骤 701, 该用户设备所属小区的基站获取相邻的小区的系统信息;
在本实施例中, 该用户设备所属小区为微小区, 该相邻小区的系统信息可包括 宏小区的系统信息, 也可包括其他微小区的系统信息, 获取的方法如实施例 1至 2所 述, 此处不再赘述;
如图 7A所示, 在本实施例中该相邻小区包括宏小区。
步骤 702, 该微基站将获取的相邻小区的系统信息通知用户设备;
此外, 还可采用用户专用信令的方式通知某个用户或某些用户。
步骤 703, 归属于该微小区的用户设备 UE接收该微小区的基站通知的系统信息, 并获取该相邻小区的系统信息。
步骤 704, 将该相邻小区的系统信息进行储存;
在本实施例中,可将该相邻小区的小区标识信息与该相邻小区的系统信息对应储 存。
步骤 705, 该用户设备判断干扰类型;
在本实施例中,在该用户设备移动到该微小区的 CRE区域时,该 UE在数据解调、 控制信道解调、 RRM测量、 CSI测量过程中, 可能会受到来自宏小区的 CRS的干扰, 这样, 该用户设备可自行判断其干扰类型, 不需网络侧指示, 与上述实施例类似, 此 处不再赘述。
步骤 706,该用户设备利用该宏小区的系统信息对来自宏小区的 CRS干扰进行干 扰抑制;
其中, 对来自宏小区的 CRS干扰进行干扰抑制是指对来自宏小区的 CRS干扰进 行干扰减轻,利用获得的系统信息对该目标微小区的控制信息和相应的业务数据进行 解调, 以对数据 /控制信道的解调增强;
在本实施例中, 可利用该系统信息中如下参数中的一个或几个, 如 CRS端口数 量和 MBSFN配置信息等。
由上述实施例可知, 在处于连接状态的用户设备 UE归属于微小区时, 可从微基 站获取相邻宏小区和 /或相邻微小区的系统信息, 该用户设备确定该小区的干扰类型 为受宏小区的 CRS干扰时, 可根据该宏小区的系统信息进行 CRS干扰抑制。
上述实施例 6是以用户设备自行确定干扰类型为例进行的说明。 以下参考图 7A 以基站侧以显示的方式指示干扰类型为例进行说明。
图 8是本发明实施例 7的干扰抑制方法流程图。 以连接状态的用户设备 UE归属 于微小区 (Macro cel l ) , 并处于微小区的 CRE区域且受到来自宏小区的 CRS干扰的 场景为例进行说明, 微基站显示指示干扰类型。
如图 8所示, 该方法包括:
步骤 801, 微基站获取相邻小区的系统信息;
在本实施例中, 该相邻小区的系统信息可包括宏小区和其他微小区的系统信息, 获得的方式如实施例 1至 2所述, 此处不再赘述;
如图 7A所示的场景, 该相邻小区为宏小区。
步骤 802, 该微基站获取该微小区和相邻小区之间, 或者该微小区、 相邻小区以 及该用户设备之间的互干扰关系;
在本实施例中, 获取该互干扰关系的方法如实施例 1所述, 此处不再赘述。 步骤 803, 该微基站根据获取的该互干扰关系来选择该相关参数; 在本实施例中, 对于与该微小区相邻的宏小区, 如果该微基站根据该互干扰关系 确定该微小区受到宏小区的 CRS干扰, 即确定干扰类型为 "强干扰的小区", 则该微 基站可从系统信息中为该宏小区选择相关参数, 如以下参数中的一个或几个, 如 CRS 端口数、 和 MBSFN配置信息, 但不限于上述参数;
如果还存在与该微小区相邻的其他微小区,同样也可根据该互干扰关系确定干扰 类型, 并从系统信息中为这些微小区选择相应的相关参数。
步骤 804, 该微基站将指示干扰类型的指示信息添加到该相关参数中; 在本实施例中, 如果 lbit信令 "0 "表示 "强干扰的小区", 则将 "0 "添加到与 宏小区的小区标识对应的相关参数中; 此外, 将该指示信息也添加到与其他微小区的 小区标识对应的相关参数中。
步骤 805, 该微基站将获取的该相邻小区的相关参数通知用户设备。
步骤 806, 归属于该微小区的用户设备 UE接收该微基站通知的该相邻小区的相 关参数, 并获取该相邻微小区的相关参数。
步骤 807, 将该相邻微小区的相关参数进行储存;
在本实施例中,可将该相邻微小区的小区标识信息与相关参数和指示信息对应储 存。
步骤 808, 该用户设备 UE确定该干扰类型;
在本实施例中, 在该 UE移动到该微小区的 CRE区域时, 该 UE作 RRM测量、 CSI 测量,对数据信道、控制信道、广播信道等解调时, 可能受到来自相邻宏小区的干扰, 该用户设备可根据该宏小区的相关参数中的指示信息 "0 "确定该微小区的干扰类型 为受宏小区的 CRS的干扰。
步骤 809, 该用户设备利用该宏小区的相关参数对来自该宏小区的 CRS干扰进行 抑制。
由上述实施例可知, 在处于连接状态的用户设备 UE归属于微小区时, 可从微基 站获取相邻宏小区和相邻微小区的相关信息, 该相关信息包含指示干扰类型的信息; 该 UE可根据该指示信息确定该小区的干扰类型, 并根据干扰类型利用获得的相关参 数进行 CRS干扰抑制。
基于上述实施例 7, 以下参考图 7A 以基站侧以隐式的方式指示干扰类型为例进 行说明。
图 9是本发明实施例 7的干扰抑制方法流程图。 以连接状态的用户设备 UE归属 于微小区 (Macro cel l ) 的场景, 并且在微小区的 CRE区域受到宏小区的 CRS干扰为 例进行说明。
步骤 901, 微基站获取相邻小区的系统信息 (MIB);
在本实施例中, 该相邻小区的系统信息 (MIB) 可包括宏小区和其他微小区的系 统信息, 获得的方式如实施例 1至 2所述, 此处不再赘述;
在图 7A所示的场景下, 该相邻小区为宏小区。
步骤 902, 该微基站获取该微小区和相邻小区之间, 或者该微小区、 相邻小区以 及该用户设备之间的互干扰关系;
在本实施例中, 获取该互干扰关系的方法如实施例 1所述, 此处不再赘述。 步骤 903, 该微基站根据获取的该互干扰关系来选择该相关参数;
在本实施例中, 对于与该微小区相邻的宏小区, 如果该微基站根据该互干扰关系 确定该微小区受到宏小区的 CRS干扰, 即确定干扰类型为 "强干扰的小区", 则该微 基站可从系统信息中为该宏小区选择相关参数, 如以下参数中的一个或几个, 如 CRS 端口数、 和 MBSFN配置信息, 但不限于上述参数;
对于与该微小区相邻的其他微小区, 同样也可根据该互干扰关系确定干扰类型, 并从系统信息中为这些微小区选择相应的相关参数;
此外, 该微基站在选择相关参数时, 将预定的指示该干扰类型的信息包含在该相 关参数中, 例如, 如果干扰类型为 "强干扰的小区", 该预定的信息为 MBSFN配置信 息, 当然也可为其他参数, 此处不再赘述; 如果干扰类型为 "受干扰的弱小区", 该 预定的信息可为 CP信息, 或其他参数, 此处不再赘述。
步骤 904, 该微基站将获取的该相邻小区的相关参数通知用户设备。
步骤 905, 归属于该微小区的用户设备 UE接收该微基站通知的该相邻小区的相 关参数, 并获取该相邻微小区的相关参数。
步骤 906, 将该相邻微小区的相关参数进行储存;
在本实施例中,可将该相邻微小区的小区标识信息与相关参数和指示信息对应储 存。
步骤 907, 该用户设备 UE确定干扰类型; 在本实施例中, 在该 UE移动到该微小区的 CRE区域时, 该 UE作 RRM测量、 CSI 测量,对数据信道、控制信道、广播信道等解调时, 可能受到来自相邻宏小区的干扰; 该用户设备可根据该宏小区的相关参数中的信息 "MBSFN配置信息"确定该微小 区的干扰类型为受宏小区的 CRS的干扰。
步骤 908, 该用户设备利用该宏小区的相关参数对来自该宏小区的 CRS干扰进行 干扰抑制。
由上述实施例可知, 在处于连接状态的用户设备 UE归属于微小区时, 可从微基 站获取相邻宏小区和相邻微小区的相关信息,该相关信息包含预定的指示干扰类型的 信息; 该 UE可根据该信息确定该小区的干扰类型, 并根据干扰类型利用获得的相关 参数进行 CRS干扰抑制。
在上述场景下, 以该微小区的干扰类型为 "强干扰小区"、 强小区为宏小区为例 进行的说明, 在这种情况下, 该指示信息可使用统一的 lbit来指示, 也可针对每个 微小区分别使用 1个 lbit信令来指示。 对于强小区为产生强干扰的微小区的情况与 宏小区类似, 此处不再赘述。
图 10是本发明实施例 9的干扰方法流程图。 以用户设备 UE当前归属于微小区
1 (Pico cell— 1 ), 并在该微小区 1 (Pico cell— 1 ) 的 CRE区域, 并且该微小区 1的 系统信息发生改变的场景为例。 如图 10所示, 该方法包括:
步骤 1001, 当微小区的系统信息发生变化时, 该微小区的基站将更新的系统信 息通知宏小区的宏基站。 这样宏基站可及时更新该微小区的系统信息;
在本实施例中, 还可通知其他微基站, 使得其他微基站也及时更新该微小区的 系统信息;
在本实施例中, 如果该微小区的系统信息在 to时刻发生变化, 则在该 to时刻 之前, 该微小区下发该变化的系统信息;
由于该微小区的系统信息发生变化, 并且由于主同步信号 /辅同步信号 /广播信 道 (PSS/SSS/PBCH) 都受到宏小区 (Macro cell ) 的强干扰, 相应的系统信息无法正 确解调, 从而也无法解调剩余的控制信令(如 PDCCH, DL-SCH, SIB-1 , Paging等)和 业务数据。 因此, 该 UE将重新和最强的宏小区同步, 与宏基站建立连接, 接收宏基 站广播的包含相邻微小区的系统信息的系统信息, 如 SIB4, 并读取其中的相邻微小 区的系统信息。 这样, 该方法还包括以下步骤: 步骤 1002, 该用户设备 UE同步到宏小区, 与宏基站建立连接。
步骤 1003,该用户设备 UE接收该宏基站通知的系统信息, 并获取包含在该系统 信息中的微小区的系统信息;
其中, 该用户设备 UE可读取该系统信息中的微小区的系统信息, 该微小区 1的 系统信息为更新的系统信息。
步骤 1004, 该宏基站根据该用户设备 UE上报的测量结果, 决定将该 UE切换至 目标微小区, 并通知该 UE相应的目标小区标识信息;
在本实施例中, 该用户设备 UE上报的测量结果可包括 RSRP和 RSRQ等 RRM测量 值, 该决定切换的目标小区的方式与现有技术类似, 此处不再赘述; 此处该目标微小 区为 Pico cel l— 1。
步骤 1005,该用户设备 UE接收该目标小区的标识信息,从获取的微小区的系统 信息中查找到该目标微小区的系统信息。
步骤 1006,该用户设备 UE利用该目标微小区的系统信息对该目标微小区受到的 干扰进行抑制。
以上实施例是以微小区的系统信息发生变化时, 由于该用户设备 UE没有获得该 变化的系统信息的情况下, 该 UE首先同步到宏小区, 从该宏小区获得该微小区变化 的系统信息, 然后当该用户设备切换到该微小区时, 该用户设备 UE可利用变化的系 统信息对该微小区受到的干扰进行抑制, 保证该 UE在该微小区中正常的工作。
图 11A是本发明实施例 10的场景示意图,图 11B是本发明实施例 10的干扰抑制 方法流程图。 以连接状态的用户设备 UE当前归属于微小区 1 (Pico cel l— 1 ), 并位 于该微小区 1的 CRE区域, 正在向另一个微小区 2 (Pico cel l— 2 ) 移动的场景为例, 此处目标微小区为 Pico cel l— 2, 在这种情况下同时存在两种干扰。
如图 11B所示, 该方法包括:
步骤 1101, 微小区 1的基站获取相邻小区的系统信息;
在本实施例中, 该相邻小区的系统信息可包括宏小区和微小区 2的系统信息, 获 得的方式如实施例 1至 2所述, 此处不再赘述。
步骤 1102, 该微基站将获取的该相邻小区的系统信息通知用户设备。
步骤 1103, 归属于该微小区 1的用户设备 UE接收该微小区 1的基站广播的该相 邻小区的系统信息。 步骤 1104, 将该相邻小区的系统信息进行储存;
在本实施例中, 可将该相邻小区的小区标识信息与系统信息对应储存。
步骤 1105, 该用户设备 UE确定该干扰类型;
在本实施例中, 在该 UE从微小区 1移动到微小区 2的 CRE区域时, 该用户设备 可自行判断其受到干扰的类型, 在这种情况下受到两种干扰, 即宏小区的 CRS干扰和 宏小区的同步信道、 广播信道和 /或广播信息的干扰。
步骤 1106, 该用户设备利用该宏小区的系统信息和对来自该宏小区的 CRS干扰 进行抑制, 即对数据 /控制信道的解调增强; 并且对来自宏小区的同步信道、 广播信 道和 /或广播信令的干扰进行抑制, 即对微小区 2的小区检测和识别, 增强对同步信 道、 广播信道和 /或广播信令的解调。
上述实施例是以微小区 1下发系统信息,且用户设备侧判断干扰类型为例进行的 说明, 此外, 还可在微小区 1的基站侧进行上述判断, 并以显示或隐式的方式来指示 的情况与上述实施例类似, 此处不再赘述。
图 12是本发明实施例 11的干扰抑制方法流程图。以用户设备 UE当前归属于微 小区 1 (Pico cel l— 1 ), 并在该微小区 1 (Pico cel l— 1 ) 的 CRE区域重启或者开机的 场景为例。 如图 12所示, 该方法包括:
步骤 1201,在用户设备 UE在微小区 1的 CRE区域重启或开机时,没有存储器相 邻小区的相关信息时, 该用户设备 UE同步到宏小区, 与宏基站建立连接;
其中, 同步到宏小区, 与宏基站建立连接的过程与现有技术类似, 此处不再赘 述。
步骤 1202,该用户设备 UE接收该宏基站通知的系统信息, 并获取该微小区的系 统信息。
步骤 1203, 该宏基站根据该用户设备 UE上报的测量结果, 决定将该 UE切换至 目标微小区, 并通知该 UE相应的目标小区标识信息;
在本实施例中, 该用户设备 UE上报的测量结果可包括 RSRP和 RSRQ等 RRM测量 值, 该决定切换的目标小区的方式与现有技术类似, 此处不再赘述; 此处该目标微小 区为 Pico cel l— 1。
步骤 1204,该用户设备 UE接收该目标小区标识信息,从获取的微小区的系统信 息中查找到该目标微小区的系统信息。 步骤 1205, 该用户设备 UE利用该目标微小区的系统信息进行相应的干扰抑制。 由上述实施例可知, 宏基站或微基站收集相邻小区的系统信息, 并通知用户设 备, 使得用户设备可利用上述信息进行干扰抑制。
通过本发明实施例, 保证用户小区搜索和小区识别的稳定性, 并可减轻宏小区 强小区的 CRS干扰, 可简化系统的信令传输复杂度, 适用于由于平衡的偏置值导致的 干扰的问题。
本发明实施例还提供了一种基站和用户设备, 如下面的实施例所述。 由于基站 和用户设备解决问题的原理与上述基于该基站和用户设备的信息获取方法相似,因此 该基站和用户设备的实施可以参见方法的实施, 重复之处不再赘述。
图 13是本发明实施例 12的基站构成示意图。 如图 13所示, 该基站 1300包括: 第一获取单元 1301和第一通知单元 1302; 其中, 第一获取单元 1301被配置用于获 取相邻小区、和 /或服务小区的相关参数; 第一通知单元 1302被配置用于将相关参数 通知用户设备, 其中该相关参数用于用户设备根据该相关参数进行相应的干扰抑制; 其中, 该相关参数包括系统信息或者包括系统信息中的部分参数信息; 该系统信 息包括与小区标识对应的以下信息中的一种或一种以上: CRS端口数、系统帧号, PHICH 配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1 ( SIB-1 ) 中的相关参数。
在本实施例中, 该基站可为宏基站, 也可为微基站。
在本实施例中, 第一获取单元 1301获取相邻小区的系统信息的方式如实施例 1 中所述, 此处不再赘述。
由上述可知, 第一获取单元 1301获取一个或一个以上相邻的小区的相关参数, 第一通知单元 1302将获取的该相邻小区和 /或本小区的相关信息通知该用户设备,这 样,归属该宏小区或微小区的用户设备可获得到该相邻小区和 /或本小区的系统信息, 这样, 当该用户设备 UE切换到该相邻小区并处于该相邻小区的 CRE区域时, 该用户 设备 UE可利用获得的该相邻小区的相关参数进行相应的干扰抑制。
在本实施例中, 在该相关参数包括系统信息的部分参数信息时, 第一获取单元 1301 被配置用于获取相邻小区和 /或服务小区的系统信息, 并从相邻小区、 和 /或服 务小区的系统信息中选择相关参数。具体选择的方式如上述实施例所述, 此处不再赘 述。 图 14是本发明实施例 13的基站构成示意图。 如图 14所示, 该基站 1400包括: 第一获取单元 1401和第一通知单元 1402, 其作用与实施例 12类似, 此处不再赘述。
如图 14所示, 该基站 1400还包括: 第二获取单元 1403, 被配置用于获取服务 小区和相邻小区之间, 或者服务小区、 相邻小区以及用户设备之间的互干扰关系; 并且, 第一获取单元 1401被配置用于根据获取的互干扰关系来选择相关参数。 在本实施例中, 如果基站侧以显示的方式指示干扰, 则基站 1400还包括: 第一 处理单元 1404, 第一处理单元 1404被配置用于在相关参数中添加用于指示干扰类型 的指示信息; 并且第一通知单元 1402通知包含指示信息的相关参数。
由上述可知, 第一获取单元 1401获取一个或一个以上相邻的小区的相关参数, 第二获取单元 1403确定互干扰关系,第一处理单元 1404根据该互干扰关系添加指示 信息在该相关参数中;第一通知单元 1402将该相邻小区和 /或本小区的相关参数通知 该用户设备, 这样, 归属该宏小区或微小区的用户设备可获得到该相邻小区和 /或本 小区的系统信息,这样,当该用户设备 UE切换到该相邻小区并处于该相邻小区的 CRE 区域时, 该用户设备 UE可利用获得的该相邻小区的相关参数进行相应的干扰抑制。
本发明实施例 14还提供一种基站, 与实施例 12的不同在于, 由基站侧以隐式的 方式指示干扰类似。 其中, 第一获取单元 1401被配置用于根据互干扰关系和预定的 用于指示干扰类型的信息来获取相关参数, 其中, 在获取的相关参数中包含预定的用 于指示干扰类型的信息。 其他单元的作用与实施例 2类似, 此处不再赘述。
在上述实施例 12-14所述的基站中, 该基站还包括:
第一接收单元, 第一接收单元被配置用于接收相邻小区上报的变化的系统信息; 第二通知单元, 第二通知单元被配置用于将变化的系统信息通知用户设备。 通过本发明实施例, 保证用户小区搜索和小区识别的稳定性, 并且还可进行 CRS 干扰抑制, 解决了现有技术中存在的问题。
图 15是本发明实施例 15的用户设备构成示意图。 如图 15所示, 用户设备 1500 包括: 第二接收单元 1501, 第二接收单元 1501被配置用于接收所属服务小区的基站 通知的相邻小区和 /或服务小区的相关参数;
该相关参数包括系统信息或者包括系统信息中的部分参数信息;系统信息包括与 小区标识对应的以下信息中的一种或一种以上: CRS端口数、 系统帧号, PHICH配置 信息,循环前缀类型信息,下行带宽信息, MBSFN配置信息,以及系统信息块 -l( SIB-l ) 中的相关参数。
如图 15所示, 用户设备 1500还包括: 第二处理单元 1502, 第二处理单元 1502 被配置用于根据接收的相关参数进行相应的干扰抑制。
如图 15所示, 用户设备 1500还包括第一确定单元 1503, 第一确定单元 1503被 配置用于确定所述用户设备受到干扰的干扰类型.
在本实施例中, 该相关参数还包括用于指示干扰类型的指示信息。
这样, 第一确定单元 1503被配置用于在第二处理单元 1502进行干扰抑制之前, 根据指示信息确定干扰类型。
在本实施例中, 该相关参数中包含预定的用于指示干扰类型的信息;
这样, 第一确定单元 1503被配置用于在第二处理单元 1502进行干扰抑制之前, 根据预定的用于指示干扰类型的信息确定干扰类型。
此外, 第一确定单元 1503被配置用于通过测量自行确定该干扰类型, 如实施例 2所述, 此处不再赘述。
在本实施例中, 用户设备 1500还包括: 上报单元(未示出), 上报单元被配置用 于向基站上报服务小区和相邻小区的测量结果,使得基站根据上报的测量结果得到服 务小区、 相邻小区和用户设备之间的互干扰关系。
由上述实施例可知, 用户设备 UE可接收当前所属微小区或宏小区的基站通知的 系统信息, 以获取相邻小区的相应系统信息。 因此, 在该用户设备被切换或小区重选 到目标小区时,该用户设备可通过已获取的微小区的系统信息对该目标小区收到的干 扰进行抑制, 对受强小区的小区专用参考信号的干扰进行干扰减轻、 和 /或对受强小 区的同步信道、 广播信道和 /或广播信令的干扰进行解调增强, 保证用户小区搜索和 小区识别的稳定性, 且可减轻干扰, 解决了现有技术中存在的问题。
本发明实施例还提供一种 CoMP网络系统, 该网络系统包括宏基站, 该宏基站可 为上述实施例所述的基站; 一个或一个以上微基站, 该微基站可为上述实施例所述的 基站; 一个或一个以上用户设备, 该用户设备为上述实施例所述的用户设备。 其中, 该宏基站和微基站、 以及用户设备的作用如上述实施例所述, 此处不再赘述。
通过上述 CoMP网络系统,使得用户设备 UE可接收当前所属小区的基站通知的系 统信息, 以获取相邻小区的系统信息。并且在该用户设备被切换到或小区重选到该相 邻小区时,该用户设备可通过已获取的相邻小区的系统信息对该目标小区受到的干扰 进行抑制, 即对受强小区的小区专用参考信号的干扰进行干扰减轻、 和 /或对受强小 区的同步信道、 广播信道和 /或广播信令的干扰进行解调增强, 保证用户小区搜索和 小区识别的稳定性, 并减轻干扰, 解决了现有技术中存在的问题。
本发明实施例还提供一种计算机可读程序, 其中当在基站中执行所述程序时, 所述程序使得计算机在该基站中执行如实施例 1、 实施例 3至 11所述的干扰抑制方 法。
本发明实施例还提供一种存储有计算机可读程序的存储介质, 其中所述计算机 可读程序使得计算机在基站中执行如实施例 1、 实施例 3至 11所述的干扰抑制方法。
本发明实施例还提供一种计算机可读程序, 其中当在用户设备中执行所述程序 时, 所述程序使得计算机在所述用户设备中执行如实施例 2、 实施例 3至 11所述的 干扰抑制方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质, 其中所述计算机 可读程序使得计算机在用户设备中执行如实施例 2、 实施例 3至 11所述的干扰抑制 方法。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件实现。 本发 明涉及这样的计算机可读程序, 当该程序被逻辑部件所执行时, 能够使该逻辑部件实 现上文所述的装置或构成部件, 或使该逻辑部件实现上文所述的各种方法或步骤。逻 辑部件例如现场可编程逻辑部件、 微处理器、 计算机中使用的处理器等。 本发明还涉 及用于存储以上程序的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述, 但本领域技术人员应该清楚, 这些描述都是示例性的, 并不是对本发明保护范围的限制。本领域技术人员可以根据 本发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范 围内。

Claims

权利要求书
1、 一种异构网分层组网中的干扰抑制方法, 所述方法包括:
用户设备所属服务小区的基站获取相邻小区、 和 /或服务小区的相关参数; 将所述相关参数通知所述用户设备,使所述用户设备利用所述相关参数进行相应 的干扰抑制;
其中, 所述相关参数包括系统信息或者包括系统信息中的部分参数信息; 所述系 统信息包括与小区标识对应的以下信息中的一种或一种以上: CRS端口数、系统帧号, PHICH配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信 息块 -1中的相关参数。
2、 根据权利要求 1所述的方法, 其中, 在所述相关参数包括系统信息的部分参 数信息时, 所述基站获取相邻小区和 /或服务小区的相关参数包括:
所述基站从所述相邻小区、和 /或所述服务小区的系统信息中选择所述相关参数。
3、 根据权利要求 2所述的方法, 其中, 在所述用户设备所属服务小区的基站获 取相邻小区和 /或服务小区的相关参数之前, 所述方法还包括:
获取所述服务小区和所述相邻小区之间, 或者所述服务小区、所述相邻小区以及 所述用户设备之间的互干扰关系;
并且所述基站根据获取的所述互干扰关系来选择所述相关参数。
4、 根据权利要求 1所述的方法, 其中, 所述方法还包括:
所述基站通过接收网络侧的操作、管理和维护功能实体下发的系统信息、或者通 过基站间信息交互来获取所述相邻小区和 /或服务小区的系统信息。
5、 根据权利要求 1所述的方法, 其中, 所述基站以广播或者用户专用信令的方 式将所述相关参数通知所述用户设备。
6、 根据权利要求 3所述的方法, 其中, 所述基站通过接收网络侧的操作、 管理 和维护功能实体下发的所述互干扰关系、或者通过基站间信息交互、或者根据所述用 户设备上报的测量结果来获取所述互干扰关系。
7、 根据权利要求 3所述的方法, 其中, 在所述基站根据获取的所述互干扰关系 来选择所述相关参数后, 所述方法还包括:
在所述相关参数中添加用于指示干扰类型的指示信息;
并且所述基站通知包含所述指示信息的相关参数。
8、 根据权利要求 7所述的方法, 其中, 所述指示信息的数量与小区标识的数量 一致, 分别用于指示每个小区的干扰类型; 或者, 对于干扰类型一致的相邻小区和 / 或服务小区, 所述指示信息为一个, 统一指示所有小区的干扰类型。
9、 根据权利要求 3所述的方法, 其中, 在所述基站根据获取的所述互干扰关系 来选择所述相关参数后, 所述方法还包括:
根据所述互干扰关系在选择的所述相关参数中包含预定的用于指示干扰类型的 信息, 使得所述用户设备根据所述预定的信息进行相应的干扰抑制。
10、 根据权利要求 7或 9所述的方法, 其中, 所述干扰类型为受强小区的小区专 用参考信号的干扰、 和 /或受强小区的同步信道、 广播信道和 /或广播信令的干扰。
11、 根据权利要求 1所述的方法, 其中, 所述方法还包括:
接收所述相邻小区上报的变化的系统信息;
将变化的系统信息通知所述用户设备。
12、 一种异构网分层组网中的干扰抑制方法, 所述方法包括:
用户设备接收所属服务小区的基站通知的相邻小区和 /或所述服务小区的相关参 数; 所述相关参数包括系统信息或者包括系统信息中的部分参数信息; 所述系统信息 包括与小区标识对应的以下信息中的一种或一种以上:
CRS端口数、 系统帧号, PHICH配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1中的相关参数。
13、 根据权利要求 12所述的方法, 其中, 所述方法还包括:
根据接收的所述相关参数进行相应的干扰抑制。
14、 根据权利要求 13所述的方法, 其中, 在根据接收的所述相关参数进行相应 的干扰抑制之前, 所述方法还包括: 确定所述用户设备受到干扰的干扰类型。
15、 根据权利要求 14所述的方法, 其中, 所述用户设备通过测量来确定干扰类 型; 或者,
在所述相关参数还包括用于指示干扰类型的指示信息时,所述用户设备根据所述 指示信息确定干扰类型; 或者,
在所述相关参数中包含预定的用于指示干扰类型的信息时,所述用户设备根据所 述预定的用于指示干扰类型的信息确定干扰类型。
16、 根据权利要求 14所述的方法, 其中, 所述干扰类型为受强小区的小区专用 参考信号的干扰、 和 /或受强小区的同步信道、 广播信道和 /或广播信令的干扰; 并且所述根据接收的所述相关参数进行相应的干扰抑制, 包括:
对受强小区的小区专用参考信号的干扰进行干扰减轻、 和 /或对受强小区的同步 信道、 广播信道和 /或广播信令的干扰进行解调增强。
17、 根据权利要求 13所述的方法, 其中, 所述方法还包括:
所述用户设备向所述基站上报所述服务小区和相邻小区的测量结果,使得所述基 站根据上报的测量结果得到所述服务小区、 相邻小区和用户设备之间的互干扰关系。
18、 一种基站, 所述基站包括:
第一获取单元, 所述第一获取单元被配置用于获取相邻小区、 和 /或服务小区的 相关参数;
第一通知单元, 所述第一通知单元被配置用于将所述相关参数通知所述用户设 备, 使所述用户设备利用所述相关参数进行相应的干扰抑制;
其中, 所述相关参数包括系统信息或者包括系统信息中的部分参数信息; 所述系 统信息包括与小区标识对应的以下信息中的一种或一种以上: CRS端口数、系统帧号, PHICH配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信 息块 -1中的相关参数。
19、 根据权利要求 18所述的基站, 其中, 在所述相关参数包括系统信息的部分 参数信息时,所述第一获取单元被配置用于获取相邻小区和 /或服务小区的系统信息, 并从所述相邻小区、 和 /或所述服务小区的系统信息中选择所述相关参数。
20、 根据权利要求 18所述的基站, 其中, 所述基站还包括:
第二获取单元,所述第二获取单元被配置用于获取所述服务小区和所述相邻小区 之间, 或者所述服务小区、 所述相邻小区以及所述用户设备之间的互干扰关系; 并且,所述第一获取单元被配置用于根据获取的所述互干扰关系来选择所述相关 参数。
21、 根据权利要求 20所述的基站, 其中, 所述基站还包括:
第一处理单元,所述第一处理单元被配置用于根据所述互干扰关系在所述相关参 数中添加用于指示干扰类型的指示信息;
并且所述第一通知单元通知包含所述指示信息的相关参数。
22、 根据权利要求 20所述的基站, 其中, 所述第一获取单元被配置用于根据所述互干扰关系和预定的用于指示干扰类型 的信息来获取所述相关参数, 其中, 在获取的所述相关参数中包含预定的用于指示干 扰类型的信息。
23、 根据权利要求 18所述的基站, 其中, 所述基站还包括:
第一接收单元,所述第一接收单元被配置用于接收所述相邻小区上报的变化的系 统信息;
第二通知单元,所述第二通知单元被配置用于将变化的系统信息通知所述用户设 备。
24、 一种用户设备, 所述用户设备包括:
第二接收单元,所述第二接收单元被配置用于接收所属服务小区的基站通知的相 邻小区和 /或所述服务小区的相关参数;
所述相关参数包括系统信息或者包括系统信息中的部分参数信息;所述系统信息 包括与小区标识对应的以下信息中的一种或一种以上: CRS端口数、系统帧号, PHICH 配置信息, 循环前缀类型信息, 下行带宽信息, MBSFN配置信息, 以及系统信息块 -1 中的相关参数。
25、 根据权利要求 24所述的用户设备, 其中, 所述用户设备还包括: 第二处理单元,所述第二处理单元被配置用于根据接收的所述相关参数进行相应 的干扰抑制。
26、 根据权利要求 25所述的用户设备, 其中, 所述用户设备还包括第一确定单 元, 所述第一确定单元被配置用于确定所述用户设备受到干扰的干扰类型。
27、 根据权利要求 26所述的用户设备, 其中, 所述第一确定单元被配置用于通 过测量来确定所述干扰类型; 或者,
所述第一确定单元被配置用于在所述相关参数还包括用于指示干扰类型的指示 信息时, 根据所述指示信息确定干扰类型; 或者,
所述第一确定单元被配置用于在所述相关参数中包含预定的用于指示干扰类型 的信息时, 根据所述预定的用于指示干扰类型的信息确定干扰类型。
28、 根据权利要求 26所述的用户设备, 其中, 所述干扰类型为受强小区的小区 专用参考信号的干扰、 和 /或受强小区的同步信道、 广播信道和 /或广播信令的干扰; 并且,所述第二处理单元被配置用于对受强小区的小区专用参考信号的干扰进行 干扰减轻、和 /或对受强小区的同步信道、广播信道和 /或广播信令的干扰进行解调增 强。
29、 根据权利要求 24所述的用户设备, 其中, 所述用户设备还包括: 上报单元,所述上报单元被配置用于向所述基站上报所述服务小区和相邻小区的 测量结果, 使得所述基站根据上报的测量结果得到所述服务小区、相邻小区和用户设 备之间的互干扰关系。
30、 一种网络系统, 所述网络系统包括:
宏基站, 所述宏基站为权利要求 18至 23的任意一项权利要求所述的基站; 一个或一个以上微基站,所述微基站为权利要求 18至 23的任意一项权利要求所 述的基站;
一个或一个以上用户设备,所述用户设备为权利要求 24至 29的任意一项权利要 求所述的用户设备。
31、 一种计算机可读程序, 其中当在基站中执行所述程序时, 所述程序使得计算 机在所述基站中执行如权利要求 1至 12的任意一项权利要求所述的异构网分层组网 中的干扰抑制方法。
32、一种存储有计算机可读程序的存储介质, 其中所述计算机可读程序使得计算 机在基站中执行如权利要求 1至 12的任意一项权利要求所述的异构网分层组网中的 干扰抑制方法。
33、 一种计算机可读程序, 其中当在用户设备中执行所述程序时, 所述程序使得 计算机在所述用户设备中执行如权利要求 13至 17的任意一项权利要求所述的异构网 分层组网中的干扰抑制方法。
34、一种存储有计算机可读程序的存储介质, 其中所述计算机可读程序使得计算 机在用户设备中执行如权利要求 13至 17的任意一项权利要求所述的异构网分层组网 中的干扰抑制方法。
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CN102195672A (zh) * 2011-06-02 2011-09-21 华南理工大学 一种基于idma的ofdm系统小区间干扰消除方法

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