WO2013004128A1 - 一种配置参考信号的方法、UE及eNB - Google Patents

一种配置参考信号的方法、UE及eNB Download PDF

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Publication number
WO2013004128A1
WO2013004128A1 PCT/CN2012/077273 CN2012077273W WO2013004128A1 WO 2013004128 A1 WO2013004128 A1 WO 2013004128A1 CN 2012077273 W CN2012077273 W CN 2012077273W WO 2013004128 A1 WO2013004128 A1 WO 2013004128A1
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WIPO (PCT)
Prior art keywords
reference signal
signal configuration
configuration
preferred set
enb
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PCT/CN2012/077273
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English (en)
French (fr)
Inventor
王建国
程型清
周永行
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12807305.3A priority Critical patent/EP2717621B1/en
Publication of WO2013004128A1 publication Critical patent/WO2013004128A1/zh
Priority to US14/149,499 priority patent/US9467262B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • H04W16/26Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to a wireless communication technology, and in particular, to a method for configuring a reference signal, a User Equipment (UE), and an evolved Node B (eNB). Background technique
  • the eNB may notify the UE of the channel state information used by the Radio Resource Control (RRC) signaling-reference signal (Channel State). Based on the CSI RS configuration, the UE estimates the corresponding channel and feeds back the related channel state information (CSI).
  • RRC Radio Resource Control
  • each cell identifier corresponds to one CSI RS configuration.
  • the CSI RS can be configured for the UE according to the cell identifier.
  • the same cell identifier corresponds to multiple transmission points (TPs).
  • the low-power remote radio head (RRH) is located in the coverage of the macro base station, and each TP composed of different RRHs and macro base stations will share the same cell identifier, but the macro base station and each RRH usually Have different CSI RS configurations. That is, at this time, the same cell identifier will correspond to multiple CSI RS configurations.
  • the eNB needs to configure the appropriate CSI RS under the same cell identifier for the UE, so that the UE can select an appropriate TP access, but not only according to the cell identity configuration, because the channel conditions and the interference conditions of the macro base station and each RRH are different. .
  • the CRD CRS specific reference signal, CRS
  • CRS CRS specific reference signal
  • the embodiments of the present invention provide a method for configuring a reference signal, a UE, and an eNB, which are used to solve the problem of configuration of a reference signal caused by an RRH or a geographically separated configuration of a base station in an actual network deployment.
  • an embodiment of the present invention provides a method for configuring a reference signal, including:
  • the reference signal configuration measurement set is an information configuration of the eNB configuring a preferred set according to the reference signal, where the reference signal configuration measurement set is used by the UE to measure and feed back channel state information.
  • an embodiment of the present invention provides a method for configuring a reference signal, including: receiving, by an eNB, information of a preferred set of reference signal configurations sent by a UE;
  • the eNB configures a reference signal configuration measurement set according to the reference set configuration information of the reference signal, and sends the reference signal configuration measurement set to the UE, where the reference signal configuration measurement set is used by the UE to measure and feed back channel state information.
  • an embodiment of the present invention provides a UE, including:
  • a sending unit configured to determine a reference signal configuration preferred set, and send information of the reference signal configuration preference set to an evolved Node B eNB;
  • a first receiving unit configured to receive a reference signal configuration measurement set sent by the eNB, where the reference signal configuration measurement set is an information configuration configured by the eNB according to the reference signal, where the reference signal configuration measurement set is used for the UE
  • the channel status information is measured and fed back.
  • an embodiment of the present invention provides a network device, including: a receiving unit, configured to receive information about a preferred set of reference signal configurations sent by the UE, where the first sending unit is configured to configure a reference signal configuration measurement set according to the information of the reference set configuration preferred set, and configure the measurement set of the reference signal Sending to the user equipment UE, the reference signal configuration measurement set is used by the UE to measure and feed back channel state information.
  • the eNB obtains the reference signal configuration preference set reported by the UE, and determines the reference signal configuration measurement set that is finally configured to be configured by the UE, and may enable the eNB to use the preferred set reported by the UE.
  • the UE configures the reference signal, and can select a reference signal configuration that matches the optimal real channel of the UE when the RRH or the base station is geographically separated, thereby enabling the UE to acquire good channel conditions.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for configuring a reference signal according to the present invention
  • FIG. 2 is a schematic flowchart of another embodiment of a method for configuring a reference signal according to the present invention
  • FIG. 3 is a schematic flowchart of another embodiment of a method for configuring a reference signal according to the present invention.
  • FIG. 5 is a schematic flowchart of another embodiment of a method for configuring a reference signal according to the present invention
  • FIG. 6 is a schematic structural diagram of a system corresponding to FIG. 5;
  • FIG. 7 is a schematic structural diagram of a UE according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an eNB according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic flowchart of a method for configuring a reference signal according to an embodiment of the present invention, including: Step 11: The UE determines a reference signal configuration preferred set, and sends information about the reference signal configuration preferred set to the eNB.
  • the reference signal configuration preferred set (hereinafter referred to as a preferred set) is a set of reference signal configurations determined by the UE.
  • the UE may determine the reference signal configuration included in the preferred set by measuring corresponding metric information for each reference signal configuration.
  • the information of the preferred set may include at least one of the following: each reference signal configuration included in the preferred set, the metric information corresponding to the reference signal configuration included in the preferred set, and the metric information corresponding to the reference signal configuration included in the preferred set Differential metric information.
  • the UE may further include: the UE acquiring a reference signal configuration candidate set (hereinafter referred to as a candidate set), where the candidate set is a set of reference signal configurations acquired by the UE;
  • the reference signal configuration candidate set determines the reference signal configuration preferred set. For example, measuring metric information corresponding to each reference signal configuration in the reference signal configuration candidate set, and determining a number of reference signal configurations included in the reference signal configuration preferred set; according to the metric information, sequentially from the reference signal
  • the configuration candidate set selects the reference signal configuration of the number to form a preferred set of the reference signal configuration.
  • the foregoing metric information may be at least one of the following: Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Received Signal Strength Indicator (Received Signal Strength Indicator, RSSI), Path Loss (PL), etc.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • RSSI Received Signal Strength Indicator
  • PL Path Loss
  • the UE may select a certain number of reference signal configurations in the candidate set according to the descending order of RSRP. Make up the preferred set.
  • the reference signal configuration candidate set may include: a reference signal configuration having the same cell identifier, and the resources occupied by the reference signal configuration having the same cell identifier do not overlap each other.
  • the foregoing reference signal configuration may include: a CSI RS configuration, or a cell-specific reference signal (Cell-specific RS, CRS) port configuration, where the CRS port configuration refers to a subset of ports of all or part of the CRS configuration. Configuration.
  • the CSI RS configuration may include information such as a CSI RS port number, a resource configuration, a subframe configuration, and a reference physical downlink shared channel (PDSCH) transmission power.
  • the resource configuration may include time and/or frequency resource location occupied by each port, a sequence used, or an Orthogonal Cover Code (OCC).
  • OOCC Orthogonal Cover Code
  • the UE can measure the CSI according to the CSI RS.
  • the CSI includes a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), and a Channel Quality Indicator (CQI).
  • the CRS port configuration includes information such as resource configuration, number of CRS ports, port number, and subframe configuration.
  • the resource configuration may include the time and/or frequency resource location occupied by each port, and the sequence used.
  • the channel state information can be measured and fed back according to the CRS port configuration, and can also be used to determine a transmit diversity scheme adopted by the Physical Downlink Control Channel (PDCCH).
  • PDCH Physical Downlink Control Channel
  • Step 12 The UE receives a reference signal configuration measurement set sent by the eNB, where the reference signal configuration measurement set is configured by the eNB according to the reference signal, and the reference signal configuration measurement set is used by the UE to measure and feed back the channel status. information.
  • the reference signal configuration measurement set (hereinafter referred to as a measurement set) is a set of reference signal configurations configured by the eNB to the UE for reference signal measurement by the UE according to the measurement set.
  • the UE may configure the measurement set to measure and feed back channel state information according to the reference signal.
  • the measurement set can be: the same as the preferred set, a subset of the preferred set, a reference letter in the preferred set The combination of the number of configurations, the subset of ports in the preferred set of reference signal configurations.
  • the measurement set occupies resources of each reference signal configuration in the combination of the reference signal configurations in the preferred set, and may be at least one of the following resources: , frequency resources, sequences, or OCC resources.
  • the measurement set occupies resources of the port subset of the reference signal configuration in the preferred set, and may be at least one of the following resources: Frequency resource, sequence, or OCC resource.
  • the eNB obtains the reference signal configuration preference set reported by the UE, and determines the reference signal configuration measurement set finally configured for the UE from the preferred set, and the UE may select a preferred reference signal configuration set for itself, and then the eNB selects the preferred reference set according to the preferred set.
  • the reference signal configuration matching the optimal physical channel of the UE may be selected, thereby enabling the UE to acquire good channel conditions.
  • Step 21 The eNB receives information about a preferred set of reference signal configurations sent by the UE.
  • the method may further include: the eNB sending the reference signal configuration candidate set to the UE, so that the UE determines the reference signal configuration preferred set according to the reference signal configuration candidate set.
  • the number of ports configured by the reference signal included in the reference signal configuration candidate set is the same.
  • the information about the preferred set of the reference signal configuration includes: the reference signal configuration included in the reference signal configuration preferred set; the reference signal configuration in the preferred set includes the reference signal configuration and the reference signal configuration corresponding to the metric information; The specified reference signal configuration corresponding to the metric information and the difference between the metric information corresponding to the other reference signal configuration in the preferred set and the specified reference signal configuration corresponding metric information, where the metric information corresponds to the reference signal configuration; or, the reference The signal configuration preferred set includes the reference signal configuration and the difference of the metric information corresponding to the reference signal configuration.
  • Step 22 The eNB determines the reference signal configuration according to the information of the reference set configuration preferred set. And measuring the set, and transmitting the reference signal configuration measurement set to the UE, where the reference signal configuration measurement set is used by the UE to measure and feed back channel state information.
  • the reference signal configuration measurement set is the same as the reference signal configuration preferred set; or
  • the reference signal configuration measurement set is a subset of the reference signal configuration preferred set; or the reference signal configuration measurement set includes a reference signal configuration obtained by combining the reference signal configuration of the reference signal configuration preferred set; or The reference signal configuration measurement set includes a subset of ports of the reference signal configuration in the preferred set of reference signal configurations.
  • the reference signal configuration obtained by the combination occupies the same resource as the total resource occupied by at least two reference signal configurations before combining, and the resource includes at least one of the following items: a time resource and a frequency resource. Or a sequence resource or an OCC resource; or, the resource occupied by the port subset is part or all of a resource occupied by a reference signal configuration, and the resource includes at least one of the following items: a time resource, a frequency resource, and a sequence Resources or OCC resources.
  • the above metric information includes: RSRP, RSRQ, RSSI or PL.
  • the eNB obtains the reference signal configuration preference set reported by the UE, and determines the reference signal configuration measurement set finally configured for the UE from the preferred set, and the UE may select a preferred reference signal configuration set for itself, and then the eNB selects the preferred reference set according to the preferred set.
  • the reference signal configuration matching the optimal physical channel of the UE may be selected, thereby enabling the UE to acquire good channel conditions.
  • FIG. 3 is a schematic flowchart of another embodiment of a method for configuring a reference signal according to the present invention
  • FIG. 4 is a schematic structural diagram of a system corresponding to FIG. 3.
  • the system includes a macro base station and three RRHs, and shares the same cell ID, such as cell-id 1.
  • Each RRH is connected to the eNB through an optical fiber.
  • the CSI RS configurations of the macro base station and the three RRHs are CSI RS Config.O, CSI RS Config.l, CSI RS Config.2, and CSI RS Config.3, respectively.
  • the system includes a macro base station, but the embodiment of the present invention may also be applied to a scenario without a macro base station, for example, a system. Only the RRH is included, and each RRH is connected to the eNB through an optical fiber or other medium.
  • the eNB may be located at the macro base station or at the RHH.
  • this embodiment includes:
  • Step 31 The UE acquires a CSI RS configuration candidate set configured by the eNB, where the candidate set includes one or more CSI RS configurations.
  • the UE may obtain the candidate set in the following manner:
  • the UE receives the broadcast message sent by the eNB, where the broadcast message carries the candidate set corresponding to the cell identifier, and the UE uses the cell identifier of the UE to obtain the corresponding candidate set from the received broadcast message.
  • the cell identified as cell-id 1 in Figure 4 is configured with CSI RS Config.O, CSI RS
  • the eNB can broadcast including the above 4
  • a set of CSI RS configurations is given to the UE.
  • the UE obtains a candidate set based on the cell identity cell-id 1.
  • the UE receives the UE-specific message sent by the eNB, and the UE-specific message carries a candidate set.
  • the macro base station and the macro base station are included in FIG. 4 in the order in which the received SRS power is reduced.
  • the four TPs, including the RRH, are arranged in sequence as macro base stations, RRH2, RRH1, and RRH3.
  • the candidate set used by the eNB to notify the UE by using the UE-specific message includes: CSI RS Config. O and CSI RS Config.
  • the candidate set notified by the eNB to the UE includes: CSI RS Config.O, CSI RS Config.2 and CSI RS Config.l; if it is determined that the candidate set includes 4 CSI RS configurations, the eNB notifies the UE to use
  • the candidate set contains the above four CSI RS configurations.
  • the above candidate set may include a CSI RS configuration having the same number of ports.
  • the number of ports can be 1, 2, 4 or 8.
  • the number of ports set is 2.
  • the number of ports of CSI RS Config.O and CSI RS Config.l is 2.
  • the above candidate sets include: CSI RS Config.O and CSI RS Config .l.
  • Step 32 The UE acquires a metric corresponding to each CSI RS configuration in the CSI RS configuration candidate set. Information.
  • the metric information Metric CSI Rs may include at least one of the following items: RSRP CSI RS ,
  • RSRQcsi RS RSRQcsi RS, RSSIcsi RS or PLcsi RS.
  • the way to obtain metric information can be:
  • RSRPcsi RS is defined as RSRP based on CSI RS configuration.
  • the RSRP CSI RS can be measured based on a port in the CSI RS configuration or based on multiple ports in the CSI RS configuration.
  • RSRQcsi RS is defined as the RSRQ based on the CSI RS configuration.
  • the RSRQ CSI RS can be measured based on a port in the CSI RS configuration, or can be obtained based on multiple ports in the CSI RS configuration.
  • RSSIcsi RS is defined as the RSSI based on the CSI RS configuration.
  • the RSSI CSI RS can be measured based on a port in the CSI RS configuration, or can be obtained based on multiple ports in the CSI RS configuration.
  • PLCSI RS is defined based on the obtained CSI RS configuration PL, the PL CSI RS may CSI RS configuration obtained based on a measurement port, can be obtained based on the plurality of ports CSI RS configuration.
  • Step 33 The UE selects, according to the metric information, sequentially selects M2 CSI RS configurations from the CSI RS configuration candidate set to form a CSI RS configuration preferred set.
  • the M2 may be notified by the eNB to the UE, or may be determined by the UE according to M1, where M1 is the number of CSI RS configurations included in the candidate set.
  • M1 is the number of CSI RS configurations included in the candidate set.
  • the implicit correspondence between M1 and M2 may include, but is not limited to, the contents shown in Table 1.
  • the candidate set includes CSI RS Config.0, CSI RS Config.l And CSIRSConfig.2.
  • the candidate set selects the first two preferred set, that is, the preferred set includes: CSIRSConfig.0, CSI RS Config.2.
  • Step 34 The UE sends the information of the preferred set of the CSI RS configuration to the eNB.
  • the information of the preferred set may be a CSI RS configuration included in the preferred set; CSI RS configuration and corresponding metric information; CSIRS configuration, metric information corresponding to the specified reference signal configuration, and metric information corresponding to other reference signal configurations.
  • the specified reference signal configuration corresponds to a difference of the metric information, where the metric information corresponds to the CSI RS configuration; or the difference between the CSI RS configuration and the metric information corresponding to the CSI RS configuration.
  • the following combination index r r can be used.
  • each CSI RS configuration reported in the preferred set includes CSI RS Config.O and CSI RS Config.2.
  • each CSI RS configuration reported by the UE in the preferred set is ordered.
  • the order includes: in the order of priority or in the order of corresponding metric information values.
  • the metric information is the RSRP
  • the CSI RS configuration reported by the UE in the preferred set is CSI.
  • the UE reports each CSIRS configuration and corresponding metric information in the preferred set. For example, report CSI RS Config.O and CSI RS Config.2 and corresponding metric information Metric CSIRS c . Nflg . 0 And Metric CSI RS Config.2.
  • each CSI RS configuration reported by the UE in the preferred set is ordered.
  • the CSI RS configuration reported by the UE in the preferred set is CSI RS Config.O and CSI RS Config.2, and the corresponding metric information Metric CSI RS Config .O and Metric CSI RS Config.2.
  • the UE reports the difference between the metric information of each CSI RS configuration and part of the CSI RS configuration and the metric information of the other part of the CSI RS configuration. For example, report CSI RS Config.O, CSI RS Config.2, and metric information Metric CSI RS C . Nflg .Q and differential metric Metriccsi Rs c. n fig.2- Metric CS i RS c. n fi g . Or Metric CS i RS c. n fi g . - Metric CS i RS
  • each CSI RS configuration information reported by the UE in the preferred set is ordered, for example,
  • the CSI RS configuration reported by the UE in the preferred set is CSI RS Config.O and CSI RS Config.2 and the corresponding metric information Metric CSI RS config.o and differential metric Metric CSI RS c . Nflg . 2 - MetriccsiRs Config.O or Metric CSI RS Config.O" Metriccsi Rs Config, 2.
  • the UE reports the difference between the metric information corresponding to each CSI RS configuration and the CSI RS configuration in the preferred set. For example, report CSI RS Config.O and CSI RS Config.2 and the corresponding differential metric Metriccsi RS c. n fi g .2- Metric CS i RS config.o or Metric CS i RS c. n fig.o- Metric CS i RS
  • each CSI RS configuration reported by the UE in the preferred set is ordered.
  • the CSI RS configuration reported by the UE in the preferred set is CSI RS Config.O and CSI RS Config.2 and the corresponding differential metric Metric CSI RS Config. .2" MetriccsiRs Config.O or Metric CSI RS Config.O"
  • Step 35 The eNB 4 determines the CSI RS configuration measurement set according to the CSI RS configuration preferred set information.
  • the measurement set may include: a preferred set, a subset of the preferred set, a configuration combination of the preferred centralized CSI RS configuration, or a subset of the ports of the preferred centralized CSI RS configuration.
  • the measurement set is the same as the preferred set.
  • the information of the preferred set reported by the UE includes: CSI RS Config.O and CSI RS Config.2, and the measurement set includes: CSI RS Config.O and CSI RS Config.2.
  • the measurement set is a subset of the preferred set.
  • the information of the preferred set reported by the UE includes: CSI RS Config.O and CSI RS Config.2, and the measurement set may include: CSI RS Config.0.
  • the measurement set includes a configuration combination of the preferred centralized CSI RS configuration.
  • the information of the preferred set reported by the UE includes: CSI RS Config.O and CSI RS Config.2, and CSI RS Config.O and CSI RS Config.2 are both 2-port CSI RS configurations.
  • the time frequency resource occupied by CSI RS Config.O and CSI RS Config.2 corresponds to a 4-port CSI RS configuration, and the 4-port CSI RS configuration is assumed to be CSI RS Config.O', then the measurement set may include CSI.
  • the measurement set includes a subset of ports that are preferred for centralized CSI RS configuration.
  • the information of the preferred set reported by the UE includes: CSI RS Config. O and CSI RS Config. O is a 4-port CSI RS configuration.
  • the time frequency resource occupied by CSI RS Config.O corresponds to a CSI RS configuration of two 2-ports, and one of the 2-port CSI RS configurations is assumed to be CSI RS Config.O", and the measurement set may include CSI RS Config. O" foi Step 36:
  • the eNB notifies the UE of the CSI RS configuration measurement set. Thereafter, the UE may perform CSI measurement according to each CSI RS configuration in the CSI RS configuration measurement set.
  • the UE reports the preferred set by the UE, so that the eNB configures a suitable reference signal for the UE, so that the UE obtains a good channel condition.
  • the size of the candidate set can be constrained, and the implementation complexity of the UE measurement is effectively reduced.
  • the preferred set is fed back by the UE, and the preferred set can be constrained in size, which can effectively reduce the feedback overhead of the UE. This embodiment is applicable to the scenario of CSI RS configuration.
  • FIG. 5 is a schematic flowchart of another embodiment of a method for configuring a reference signal according to the present invention
  • FIG. 6 is a schematic structural diagram of a system corresponding to FIG. 5.
  • the system includes a macro base station and three RRHs, and shares the same cell ID, such as cell-id 1.
  • Each RRH is connected to the eNB through an optical fiber.
  • the CRS port configurations of the macro base station and the three RRHs are CRS Config.O, CRS Config.l, CRS Config.2, and CRS Config.3, respectively.
  • the system includes a macro base station, but the embodiment of the present invention may also be applied to a scenario without a macro base station.
  • the system only includes an RRH, and each RRH passes through an optical fiber or other medium and an eNB. connection.
  • the eNB may be located at the macro base station or at the RHH.
  • this embodiment includes:
  • Step 51 The UE acquires a CRS port configuration candidate set configured by the eNB, where the candidate set includes one or more CRS port configurations.
  • the UE may obtain the candidate set in the following manner: 1) The UE receives a PBCH (Physical Broadcast Channel), and the UE obtains a corresponding CRS configuration from the received PBCH by using the cell identifier of the UE, where the CRS configuration is a CRS. A candidate set for port configuration.
  • PBCH Physical Broadcast Channel
  • the cell identified as cell-id 1 in Figure 6 is configured with CRS Config.O, CRS Config.l, CRS Config.2, CRS Config.3, each of which has a CRS port, and the above ports can occupy the same
  • the time/frequency resource location can also occupy different time/frequency resource locations. For example: occupying different resource locations, there are 4 CRS ports, and the 4 CRSs
  • the CRS configuration corresponding to the port may be carried by the eNB through the PBCH and received by the UE. For example, if two different resource locations are occupied, then two CRS ports are included, and the CRS configuration corresponding to the two CRS ports may be carried by the eNB through the PBCH and received by the UE.
  • the UE receives a broadcast message sent by the eNB, where the broadcast message carries a candidate set corresponding to the cell identifier, and the UE obtains a corresponding candidate set from the received broadcast message by using the cell identifier of the UE;
  • the UE receives the UE-specific message sent by the eNB, and the UE-specific message carries a candidate set.
  • the candidate set used by the eNB to notify the UE by using the UE-specific message includes: CRS Config.O and CRS Config.2; if it is determined that the candidate set includes 3 CRS ports
  • the candidate set notified by the eNB to the UE includes: CRS Config.O, CRS Config.2 and CRS Config.l; if it is determined that the candidate set includes 4 CRS port configurations, the candidate set notified by the eNB to the UE includes the above 4 CRS port configuration.
  • the above candidate set may include a CRS port configuration having the same number of ports.
  • the number of ports can be 1, 2, 4 or 8.
  • the number of ports set is 2.
  • the number of ports of CRS Config.O and CRS Config.l is 2.
  • the above candidate sets include: CRS Config.O and CRS Config.l.
  • Step 52 The UE acquires metric information corresponding to each CRS port configuration in the CRS port configuration candidate set.
  • the metric information Metric CRS may include at least one of the following: RSRP CRS , RSRQ CRS , RSSI CRS, or PL CRS.
  • the way to obtain metric information can be:
  • RSRPCRS is defined as RSRP based on CRS port configuration.
  • the RSRP CRS can be measured based on a port in the CRS port configuration, or based on multiple CRS port configurations. The port gets.
  • RSRQ CRS is defined as the RSRQ based on the CRS port configuration, which can be measured based on a port in the CRS port configuration, or can be obtained based on multiple ports in the CRS port configuration.
  • RSSICRS is defined as the RSSI based on the CRS port configuration.
  • the RSSI CRS can be measured based on a port in the CRS port configuration, or can be obtained based on multiple ports in the CRS port configuration.
  • PL CRS is defined as PL based on CRS port configuration, what? ! ⁇ can be measured based on a port in the CRS port configuration, or based on multiple ports in the CRS port configuration.
  • Step 53 The UE selects the M2 CRS port configurations in sequence from the CRS port configuration candidate set according to the metric information to form a CRS port configuration preferred set.
  • the M2 may be notified by the eNB to the UE, or may be determined by the UE according to M1, where M1 is the number of CRS port configurations included in the candidate set.
  • M1 is the number of CRS port configurations included in the candidate set.
  • the implicit correspondence between M1 and M2 may include, but is not limited to, the contents shown in Table 1.
  • the candidate set contains CRS Config.0, CRS Config.l, and CRS Config.2.
  • the first two components are preferred sets, that is, the preferred set includes: CRS Config.0, CRS Config.2
  • Step 54 The UE sends the information of the preferred set of the CRS port configuration to the eNB.
  • the information of the preferred set may be a CRS port configuration included in the preferred set; CRS end Port configuration and corresponding metric information; the CRS port configuration, the metric information corresponding to the specified CRS port configuration, and the difference metric information of the metric information corresponding to the specified CRS port configuration and the metric information corresponding to the specified CRS port configuration, where The metric information corresponds to the CRS port configuration; or the differential metric information of the metric information corresponding to the CRS port configuration and the CRS port configuration.
  • the following combination index can be used.
  • ⁇ M 2 _'/ is an extended binomial coefficient defined as ⁇ y / 0 x ⁇ y , where w is the number of combinations of y terms selected from the x terms.
  • each CRS port configuration reported in the preferred set includes CRS Config.O and CRS Config.2.
  • each CRS port configuration reported by the UE in the preferred set is ordered.
  • the order includes: in the order of priority or in the order of corresponding metric information values.
  • the metric information is the RSRP
  • the CRS port configuration reported by the UE in the preferred set is CRS Config. .O and CRS Config.2.
  • the UE reports the configuration of each CRS port in the preferred set and the corresponding metric information. For example, report CRS Config.O and CRS Config.2 and the corresponding metric information Metric CRS c . Nflg . 0 and
  • each CRS port configuration reported by the UE in the preferred set is ordered.
  • the CRS port configuration reported by the UE in the preferred set is CRS Config.O and CRS Config.2, and the corresponding metric information Metric CSI RS Config. And Metric CSI RS Config.2.
  • the UE reports the metric information of each CRS port configuration and the specified CRS port configuration in the preferred set and the difference between the other CRS port configurations and the metric information of the specified CRS port configuration.
  • MetriccRs Config.2 MetriccRs c on fi g .o or Metric C Rs config.o- Metric C Rs Config.2.
  • each CRS port configuration reported by the UE in the preferred set is ordered.
  • the CRS port configuration reported by the UE in the preferred set is CRS Config.O and CRS Config.2 and the corresponding metric information Metric CRS c . Nfi go and differential metric Metric CRS c . Nfi g. 2 - Metric CRS config.o or MetriccRs config.o- Metric C Rs Config.2.
  • the UE reports the difference of the metric information corresponding to each CRS port configuration and CRS port configuration in the preferred set. For example, report CRS Config.O and CRS Config.2 and the corresponding differential metrics
  • MetriccRs Config.2 Metric CRS C. nfigO or MetriccRs config.o- Metric CRS Config.2.
  • each CRS port configuration reported by the UE in the preferred set is ordered, for example,
  • the CRS port configuration in the preferred set on the UE is CRS Config.O and CRS Config.2 and the corresponding differential metric Metric CRS config.2-Metric CRS Confi go or Metric CRS c . n fig.o- MetriccRs Config.2.
  • Step 55 The eNB determines the CRS port configuration measurement set according to the CRS port configuration preference set information, and notifies the UE of the CRS port configuration measurement set.
  • the measurement set may include: a preferred set, a subset of the preferred set, or a subset of the ports of the preferred centralized CRS port configuration.
  • the measurement set is the same as the preferred set.
  • the information of the preferred set reported by the UE includes: CRS Config.O and CRS Config.2, and the measurement set includes: CRS Config.O and CRS Config.2.
  • the measurement set is a subset of the preferred set.
  • the information of the preferred set reported by the UE includes: CRS Config.O and CRS Config.2, and the measurement set may include: CRS Config.0.
  • the measurement set can include: CRS Config.O and CRS Config.2, otherwise
  • the quantity set can include: CRS Config.0.
  • the information of the preferred set reported by the UE includes: CRS Config.0, CRS Config.2, and
  • MetriccRs Config.2 MetriccRs config.O ' If Metric C Rs Config.2" MetriccRs Config.O > - Threshold Metnc , the measurement set can include: CRS Config.O and CRS Config.2, otherwise the measurement set can include: CRS Config.0.
  • the measurement set includes a subset of ports that are preferred for centralized CRS port configuration.
  • the preferred set of information reported by the UE includes: CRS Config.O and CRS Config.O is a 4-port CRS port configuration.
  • the time-frequency resource occupied by CRS Config.O corresponds to the CRS port configuration of a 2-port, and the CRS port configuration of the 2-port is set to CRS Config.O", and the measurement set may include CRS Config.O"
  • Step 56 The eNB notifies the UE of the CRS port configuration measurement set.
  • the UE reports the preferred set by the UE, so that the eNB configures a suitable reference signal for the UE, so that the UE obtains a good channel condition.
  • the size of the candidate set can be constrained, and the implementation complexity of the UE measurement is effectively reduced.
  • the preferred set is fed back by the UE, and the preferred set can be constrained in size, which can effectively reduce the feedback overhead of the UE. This embodiment is applicable to the scenario of configuring a CRS port.
  • FIG. 7 is a schematic structural diagram of a UE according to an embodiment of the present invention, including a sending unit 71 and a first receiving unit 72.
  • the sending unit 71 is configured to determine a reference signal configuration preferred set, and send the reference signal configuration preferred set information.
  • the first receiving unit 72 is configured to receive a reference signal configuration measurement set sent by the eNB, where the reference signal configuration measurement set is an information configuration of the eNB configuring a preferred set according to the reference signal, where the reference signal configuration measurement set Used for UE measurement and feedback channel status information.
  • the method may further include: a second receiving unit, configured to acquire a reference signal configuration candidate set, to determine the reference signal configuration preferred set according to the reference signal configuration candidate set. Further, the number of ports configured by each reference signal included in the reference signal configuration candidate set acquired by the second receiving unit is the same.
  • the reference signal configuration candidate set acquired by the second receiving unit includes: a reference signal configuration having the same cell identifier, and the resources occupied by the reference signal configuration having the same cell identifier do not overlap each other.
  • the sending unit may be specifically configured to: send the reference signal configuration included in the reference signal configuration preferred set to the eNB; or send the reference signal configuration included in the reference signal configuration preferred set and the metric information corresponding to the reference signal configuration Or the eNB; or, the reference signal configuration in the preferred set of reference signals, the metric information of the specified reference signal configuration, and the metric information of the metric information configured by the reference signal and the metric information of the specified reference signal configuration Sending to the eNB; or transmitting, to the eNB, the reference signal configuration included in the reference signal configuration preferred set, and the differential metric information of the metric information corresponding to the reference signal configuration.
  • the reference signal configuration included in the information of the reference signal configuration preferred set sent by the sending unit is ordered.
  • the reference signal configuration measurement set received by the first receiving unit is the same as the reference signal configuration preferred set; or the reference signal configuration measurement set received by the first receiving unit is the reference signal Configuring a subset of the preferred set; or, the reference signal configuration measurement set received by the first receiving unit includes a reference signal configuration obtained by combining reference signal configurations of the reference signal configuration preferred set; or, the first receiving The reference signal configuration measurement set received by the unit includes a subset of ports of the reference signal configuration of the reference signal configuration preferred set.
  • the reference signal configuration obtained by the combination of the reference signal configuration measurement set received by the first receiving unit occupies the same resource as the reference signal configuration of at least two of the combinations before the combination.
  • the resource includes at least one of the following: a time resource, a frequency resource, a sequence resource, or an OCC resource; or, the reference signal configuration measurement set received by the first receiving unit occupies the port subset Resource and a reference signal configuration office
  • the resources are the same, and the resources include at least one of the following: a time resource, a frequency resource, a sequence resource, or an OCC resource.
  • the foregoing sending unit may determine, according to the reference signal configuration candidate set received by the first receiving unit, the reference signal configuration preferred set: measuring metric information corresponding to each reference signal configuration in the reference signal configuration candidate set, and Determining, according to the metric information, sequentially selecting, according to the metric information, the reference signal configuration from the reference signal configuration candidate set in sequence to form the reference signal configuration Preferred set.
  • the number of reference signal configurations included in the reference signal configuration preferred set may be as follows: according to the number of reference signal configurations included in the reference signal candidate set, and the reference signal included in the reference signal candidate set Determining, by the number of configurations, an implicit correspondence between the number of reference signal configurations included in the preferred set of reference signal configurations, determining a number of reference signal configurations included in the preferred set of reference signal configurations; or receiving the eNB to send The notification message carries the number of reference signal configurations included in the preferred set of reference signal configurations.
  • the foregoing second receiving unit may be specifically configured to: receive a broadcast message sent by the eNB, where the broadcast message carries a reference signal candidate set corresponding to the cell identifier, and the UE acquires a corresponding reference signal candidate set according to the cell identifier of the UE; Or receiving the UE-specific message sent by the eNB, where the UE-specific message carries the reference signal candidate set.
  • the above reference signal configuration may include: a CSI RS configuration or a CRS port configuration, where the CRS port configuration refers to a configuration consisting of all or part of a port subset in the CRS configuration.
  • the above metric information may include at least one of the following: RSRP, RSRQ, RSSI or path loss.
  • the same number of ports mentioned above can be: 1, 2, 4 or 8.
  • the UE reports the preferred set by the UE, so that the eNB can configure an appropriate reference signal for the UE, so that the UE obtains a good channel condition.
  • this embodiment passes the UE in the candidate set. Selecting the preferred set can constrain the size of the candidate set and effectively reduce the implementation complexity of the UE measurement.
  • the preferred set of the UE is fed back, and the preferred set can be constrained in size, which can effectively reduce the feedback overhead of the UE.
  • FIG. 8 is a schematic structural diagram of an eNB according to an embodiment of the present invention, including a receiving unit 81 and a first sending unit 82.
  • the receiving unit 81 is configured to receive information about a preferred set of reference signal configurations sent by the UE.
  • the first sending unit 82 is configured to: And configuring the reference signal configuration measurement set according to the information of the reference signal configuration preferred set, and sending the reference signal configuration measurement set to the UE, where the reference signal configuration measurement set is used by the UE to measure and feed back channel state information.
  • the method may further include: sending, by the second sending unit, a reference signal configuration candidate set to the UE, so that the UE determines the reference signal configuration preferred set according to the reference signal configuration candidate set.
  • the number of ports configured by each reference signal included in the reference signal configuration candidate set sent by the second sending unit is the same.
  • the reference signal configuration candidate set sent by the second sending unit includes: a reference signal configuration having the same cell identifier, and the resources occupied by the reference signal configuration having the same cell identifier do not overlap each other.
  • the information of the reference signal configuration preferred set received by the receiving unit may include: a reference signal configuration included in the reference signal configuration preferred set; the reference signal configuration and the reference signal configuration included in the reference signal configuration preferred set Metric information; the reference signal configuration preferred configuration includes a reference signal configuration, metric information of the specified reference signal configuration, and differential metric information of the metric information of the other reference signal configuration and the metric information of the specified reference signal configuration; or And the reference signal configuration includes a reference signal configuration included in the preferred set, and differential metric information of the metric information corresponding to the reference signal configuration.
  • the information about the reference signal configuration preferred set received by the receiving unit includes the reference signal configuration that is ordered.
  • the reference signal configuration measurement set sent by the first sending unit and the parameter may be The reference signal configuration preference set is the same; or the reference signal configuration measurement set sent by the first sending unit is a subset of the reference signal configuration preferred set; or the reference signal sent by the first sending unit Configuring a measurement set includes a reference signal configuration obtained by combining a reference signal configuration in a preferred set of reference signal configurations; or the reference signal configuration measurement set sent by the first sending unit includes a reference signal in a preferred set of the reference signal configuration A subset of the configured ports.
  • the reference signal configuration obtained by the combination of the reference signal configuration measurement set sent by the first sending unit occupies the same resource as the total resource occupied by at least two reference signal configurations before combining.
  • the resource includes: a time resource, a frequency resource, or a sequence resource or an OCC resource; or the resource occupied by the port subset included in the reference signal configuration measurement set sent by the first sending unit is a reference signal configuration Part or all of the resources, the resources include: time resources, frequency resources or sequence resources or OCC resources.
  • the above metric information may be at least one of the following: RSRP, RSRQ, RSSI or path loss.
  • the above eNB may be located at the macro base station or at the RRH.
  • the UE reports the preferred set by the UE, so that the eNB configures a suitable reference signal for the UE, so that the UE obtains a good channel condition.
  • the size of the candidate set can be constrained, and the implementation complexity of the UE measurement is effectively reduced.
  • the preferred set is fed back by the UE, and the preferred set can be constrained in size, which can effectively reduce the feedback overhead of the UE. This embodiment is applicable to the scenario of CSI RS configuration.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明提供一种配置参考信号的方法、UE及eNB。该方法包括UE确定参考信号配置首选集,并将所述参考信号配置首选集的信息发送给eNB;UE接收eNB发送的参考信号配置测量集,所述参考信号配置测量集是所述eNB根据所述参考信号配置首选集的信息配置,所述参考信号配置测量集用于UE测量并反馈信道状态信息。本发明实施例可以在RRH或者基站地理上分开时能够选择与UE最优实际信道相匹配的参考信号配置,进而使UE获取良好的信道条件。

Description

一种配置参考信号的方法、 UE及 eNB
本申请要求于 2011 年 7 月 7 日提交中国专利局、 申请号为 201110189881.2、 发明名称为 "一种配置参考信号的方法、 UE及 eNB" 的 中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及无线通信技术, 尤其涉及一种配置参考信号的方法、 用户 设备 ( User Equipment, UE )及演进节点 B ( evolved Node B , eNB ) 。 背景技术
现有的长期演进( Long Term Evolution, LTE )版本 10 ( Release 10, R10 ) 中, eNB可以通过无线资源控制 ( Radio Resource Control, RRC )信 令通知 UE 使用的信道状态信息-参考信号 (Channel State Information Reference Signal, CSI RS ) 配置, UE根据该 CSI RS配置, 估计对应的信 道并反馈相关的信道状态信息(Channel State Information, CSI )。 R10系统 中, 通常每个小区标识对应一个 CSI RS 配置, 此时可以根据小区标识为 UE配置 CSI RS。
LTE R11新引入的异构网网络部署场景中, 同一个小区标识将对应多 个传输点( Transmission Point, TP )。例如,低功率远端射频头( Remote Radio Head, RRH )位于宏基站的覆盖范围内, 由不同的 RRH及宏基站构成的各 个 TP将共用同一个小区标识, 但是, 宏基站及每个 RRH通常具有不同的 CSI RS配置。 即, 此时, 同一个小区标识将对应多个 CSI RS配置。 由于 宏基站和每个 RRH对应的信道条件、 干扰条件的不同, eNB需要为 UE配 置同一个小区标识下的合适的 CSI RS, 以便 UE能够选择合适的 TP接入, 而不能仅仅根据小区标识配置。 此外, 对于异构网网络部署场景而言, 小区特定参考信号 CRS ( Cdl specific Reference Signal, CRS )面临类似的由于 RRH或者宏基站在地理上 分开配置而导致的 CRS端口选择问题。 发明内容
本发明实施例提供一种配置参考信号的方法、 UE及 eNB, 用以解决实 际网络部署由于 RRH 或者基站地理上分开配置而导致的参考信号配置问 题。
一方面, 本发明实施例提供一种配置参考信号的方法, 包括:
UE确定参考信号配置首选集, 并将所述参考信号配置首选集的信息发 送给 eNB;
UE接收 eNB发送的参考信号配置测量集, 所述参考信号配置测量集是 所述 eNB根据所述参考信号配置首选集的信息配置,所述参考信号配置测量 集用于 UE测量并反馈信道状态信息。
另一方面, 本发明实施例提供一种配置参考信号的方法, 包括: eNB接收 UE发送的参考信号配置首选集的信息;
eNB根据所述参考信号配置首选集的信息配置参考信号配置测量集,并 将所述参考信号配置测量集发送给 UE,所述参考信号配置测量集用于 UE测 量并反馈信道状态信息。
一方面, 本发明实施例提供一种 UE, 包括:
发送单元, 用于确定参考信号配置首选集, 并将所述参考信号配置首 选集的信息发送给演进节点 B eNB;
第一接收单元,用于接收 eNB发送的参考信号配置测量集,所述参考信 号配置测量集是所述 eNB根据所述参考信号配置首选集的信息配置,所述参 考信号配置测量集用于 UE测量并反馈信道状态信息。
另一方面, 本发明实施例提供一种网络设备, 包括: 接收单元, 用于接收 UE发送的参考信号配置首选集的信息; 第一发送单元, 用于根据所述参考信号配置首选集的信息配置参考信 号配置测量集, 并将所述参考信号配置测量集发送给用户设备 UE, 所述参 考信号配置测量集用于 UE测量并反馈信道状态信息。
由上述技术方案可知, 本发明实施例通过 eNB获取 UE上报的参考信 号配置首选集, 并从该首选集中确定最终配置给 UE 的参考信号配置测量 集, 可以使得 eNB根据 UE上报的该首选集为 UE配置参考信号, 可以在 RRH或者基站地理上分开时能够选择与 UE最优实际信道相匹配的参考信 号配置, 进而使 UE获取良好的信道条件。 附图说明
为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述 中所需要使用的附图作一筒单地介绍, 显而易见地, 下面描述中的附图是 本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳 动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明配置参考信号的方法一实施例的流程示意图;
图 2为本发明配置参考信号的方法另一实施例的流程示意图; 图 3为本发明配置参考信号的方法另一实施例的流程示意图; 图 4为图 3对应的系统结构示意图;
图 5为本发明配置参考信号的方法另一实施例的流程示意图; 图 6为图 5对应的系统结构示意图;
图 7为本发明提供的 UE—实施例的结构示意图;
图 8为本发明提供的 eNB—实施例的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
图 1为本发明配置参考信号的方法一实施例的流程示意图, 包括: 步骤 11: UE确定参考信号配置首选集, 并将所述参考信号配置首选集 的信息发送给 eNB。
其中, 该参考信号配置首选集(以下筒称为首选集)是 UE确定的一种 参考信号配置的集合。 UE可以通过测量每个参考信号配置对应的度量信息 来确定该首选集中包括的参考信号配置。
该首选集的信息可以包括如下项中的至少一项: 首选集中包括的每个 参考信号配置、 首选集中包括的参考信号配置对应的度量信息、 首选集中 包括的参考信号配置对应的度量信息之间的差分度量信息。
进一步地, UE确定首选集之前还可以包括: UE获取参考信号配置候 选集(以下筒称为候选集), 该候选集是 UE获取的一种参考信号配置的集 合; 之后, UE可以根据所述参考信号配置候选集确定所述参考信号配置首 选集。 例如, 测量所述参考信号配置候选集中每个参考信号配置对应的度 量信息, 并确定所述参考信号配置首选集中包括的参考信号配置的个数; 根据所述度量信息, 依次从所述参考信号配置候选集中选取所述个数的参 考信号配置, 组成所述参考信号配置首选集。
上述的度量信息可以为如下项中的至少一项: 参考信号接收功率 ( Reference Signal Received Power, RSRP )、参考信号接收质量 ( Reference Signal Received Quality, RSRQ ) 、 接收信号强度指示 (Received Signal Strength Indicator, RSSI ) 、 路径损耗(Path Loss, PL )等。
以 RSRP为例, 当 UE测量得到每个参考信号配置对应的 RSRP后, 可 以按照 RSRP 的降序排列顺序, 在候选集中选择一定个数的参考信号配置 组成首选集。
进一步地, 所述参考信号配置候选集中可以包括: 具有相同小区标识 的参考信号配置, 所述具有相同小区标识的参考信号配置占用的资源互不 重叠。
上述的参考信号配置可以包括: CSI RS配置, 或者小区特定的参考信 号 (Cell-specific RS, CRS )端口配置, 其中, 所述 CRS端口配置是指由 CRS配置中全部或部分端口子集构成的配置。
其中, CSI RS配置可以包括 CSI RS端口数、 资源配置、 子帧配置以 及参考物理下行共享信道 ( Physical Downlink Shared Channel, PDSCH )发 射功率等信息。资源配置可以包括各个端口占用的时间和 /或频率资源位置、 使用的序列或者正交掩码(Orthogonal Cover Code, OCC )等。 UE在获取 CSI RS配置后可以根据 CSI RS测量 CSI。 CSI包括秩指示( Rank Indicator, RI )、 预编码矩阵指示( Precoding Matrix Indicator, PMI )和信道质量指示 ( Channel Quality Indicator, CQI )等。
CRS端口配置, 包括资源配置、 CRS端口数、 端口号、 子帧配置等信 息, 其中资源配置可以包括各个端口占用的时间和 /或频率资源位置、 使用 的序列等。 根据 CRS端口配置可以测量并反馈信道状态信息, 也可以用于 确定物理下行控制信道 ( Physical Downlink Control Channel, PDCCH )采 用的发射分集方案等。
步骤 12: UE接收 eNB发送的参考信号配置测量集, 所述参考信号配 置测量集是所述 eNB根据所述参考信号配置首选集配置, 所述参考信号配 置测量集用于 UE测量并反馈信道状态信息。
其中,该参考信号配置测量集(以下筒称为测量集)是 eNB配置给 UE, 由 UE根据该测量集进行参考信号测量的参考信号配置的集合。 UE可以根 据该参考信号配置测量集测量并反馈信道状态信息。
该测量集可以是: 与首选集相同、 首选集的子集、 首选集中的参考信 号配置的组合、 首选集中的参考信号配置的端口子集。
进一步地, 如果该测量集是首选集中的参考信号配置的组合, 则该测 量集占用首选集中的参考信号配置的组合中各个参考信号配置的资源, 可 以是如下资源中的至少一种: 时间资源、 频率资源、 序列或者 OCC资源。
进一步地, 如果该测量集是首选集中的参考信号配置的端口子集, 则 该测量集占用首选集中的参考信号配置的端口子集的资源, 可以是如下资 源中的至少一种: 时间资源、 频率资源、 序列或者 OCC资源。
本实施例通过 eNB获取 UE上报的参考信号配置首选集, 并从该首选 集中确定最终配置给 UE的参考信号配置测量集, UE可以为自身选择首 选的参考信号配置集, 进而 eNB根据该首选集为 UE配置参考信号, 则可 以选择与 UE最优实际信道相匹配的参考信号配置,进而使 UE获取良好的 信道条件。
图 2为本发明配置参考信号的方法另一实施例的流程示意图, 包括: 步骤 21: eNB接收 UE发送的参考信号配置首选集的信息。
在此步骤之前还可以包括: eNB向 UE发送参考信号配置候选集, 以 便所述 UE根据所述参考信号配置候选集确定所述参考信号配置首选集。
优选地, 所述参考信号配置候选集中包括的参考信号配置的端口数相 同。
上述的所述参考信号配置首选集的信息包括: 所述参考信号配置首选 集中包括的参考信号配置; 所述参考信号配置首选集中包括的参考信号配 置及参考信号配置对应的度量信息; 与首选集中指定的参考信号配置相对 应的度量信息以及首选集中其它参考信号配置对应的度量信息与所述指定 的参考信号配置对应度量信息的差分, 所述度量信息与参考信号配置对应; 或者, 所述参考信号配置首选集中包括的参考信号配置、 参考信号配置对 应的度量信息的差分。
步骤 22: eNB根据所述参考信号配置首选集的信息确定参考信号配置 测量集, 并将所述参考信号配置测量集发送给 UE, 所述参考信号配置测量 集用于 UE测量并反馈信道状态信息。
其中, 所述参考信号配置测量集与所述参考信号配置首选集相同; 或 者,
所述参考信号配置测量集为所述参考信号配置首选集的子集; 或者, 所述 参考信号配置测量集包括所述参考信号配置首选集中的参考信号配置组合 得到的参考信号配置; 或者, 所述参考信号配置测量集包括所述参考信号 配置首选集中的参考信号配置的端口子集。
进一步地, 所述组合得到的参考信号配置所占的资源与组合前的至少 两个的参考信号配置所占的总资源相同, 所述资源包括如下项中的至少一 项: 时间资源、 频率资源、 序列资源或者 OCC资源; 或者, 所述端口子集 所占的资源是一个参考信号配置所占资源的部分或者全部, 所述资源包括 如下项中的至少一项: 时间资源、 频率资源、 序列资源或者 OCC资源。
上述的度量信息包括: RSRP、 RSRQ、 RSSI或者 PL。
本实施例通过 eNB获取 UE上报的参考信号配置首选集, 并从该首选 集中确定最终配置给 UE的参考信号配置测量集, UE可以为自身选择首选 的参考信号配置集, 进而 eNB根据该首选集为 UE配置参考信号, 则可以 选择与 UE最优实际信道相匹配的参考信号配置,进而使 UE获取良好的信 道条件。
图 3为本发明配置参考信号的方法另一实施例的流程示意图, 图 4为 图 3对应的系统结构示意图。
参见图 4, 本实施例中, 该系统包括一个宏基站和 3个 RRH, 且共用 同一个小区 ID, 如 cell-id 1。 每个 RRH通过光纤与 eNB连接。 宏基站和 3 个 RRH的 CSI RS配置分别为 CSI RS Config.O, CSI RS Config.l , CSI RS Config.2, CSI RS Config.3。 需要说明的是, 本实施例中, 所述系统含有宏 基站, 但是, 本发明实施例也可以应用在不含宏基站的场景, 例如, 系统 只包括 RRH, 各个 RRH通过光纤或者其他介质与 eNB连接。 eNB可以位 于宏基站处, 也可以位于 RHH处。
参见图 3, 本实施例包括:
步骤 31: UE获取 eNB配置的 CSI RS配置候选集, 该候选集中包括一 个或多个 CSI RS配置。
其中, UE可以采用如下方式获取该候选集:
1 ) UE接收 eNB发送的广播消息, 所述广播消息中携带与小区标识对 应的候选集, UE利用自身的小区标识从接收到的广播消息中获取对应的候 选集。
例如, 图 4中标识为 cell-id 1的小区配置了 CSI RS Config.O, CSI RS
Config.l , CSI RS Config.2, CSI RS Config.3。 eNB可以广播包括上述 4个
CSI RS配置的集合给 UE。 UE基于小区标识 cell-id 1得到候选集。
2 ) UE接收 eNB发送的所述 UE特定的消息, 该 UE特定的消息中携 带候选集。
例如, 假定按照接收到的 SRS功率降低的顺序, 图 4中包括宏基站和
RRH在内的 4个 TP依次排列为宏基站、 RRH2、 RRH1和 RRH3。 此时, 如果确定候选集包括 2个 CSI RS配置,则 eNB通过该 UE特定的消息通知 给 UE使用的候选集包含: CSI RS Config.O和 CSI RS Config.2; 如果确定 候选集包括 3个 CSI RS配置, eNB通知给 UE使用的候选集包含: CSI RS Config.O, CSI RS Config.2和 CSI RS Config.l; 如果确定候选集包括 4个 CSI RS配置, 则 eNB通知给 UE使用的候选集包含上述 4个 CSI RS配置。
优选地, 上述的候选集可以包括具有相同端口数的 CSI RS配置。 该端 口数可以为 1、 2、 4或 8。 例如, 设置的端口数为 2, 上述 4个 CSI RS配 置中, CSI RS Config.O和 CSI RS Config.l的端口数为 2, 则上述的候选集 包括: CSI RS Config.O和 CSI RS Config.l。
步骤 32: UE获取该 CSI RS配置候选集中每个 CSI RS配置对应的度量 信息。
该度量信息 MetricCSI Rs可以包括如下项中的至少一项: RSRPCSI RS
RSRQcsi RS、 RSSIcsi RS或者 PLcsi RS。
度量信息的获取方式可以是:
1 ) RSRPcsi RS定义为基于 CSI RS配置得到的 RSRP, 该 RSRPCSI RS可 以基于 CSI RS配置中某一端口测量得到, 也可以基于 CSI RS配置中多个 端口得到。
2 ) RSRQcsi RS定义为基于 CSI RS配置得到的 RSRQ, 该 RSRQCSI RS可 以基于 CSI RS配置中某一端口测量得到, 也可以基于 CSI RS配置中多个 端口得到
3 ) RSSIcsi RS定义为基于 CSI RS配置得到的 RSSI, 该 RSSICSI RS可以 基于 CSI RS配置中某一端口测量得到, 也可以基于 CSI RS配置中多个端 口得到
4 )PLCSI RS定义为基于 CSI RS配置得到 PL,该 PLCSI RS可以基于 CSI RS 配置中某一端口测量得到, 也可以基于 CSI RS配置中多个端口得到。
步骤 33: UE根据该度量信息, 从 CSI RS配置候选集中依次按序选取 M2个 CSI RS配置组成 CSI RS配置首选集。
其中, M2可以是 eNB通知给 UE的, 也可以是 UE根据 Ml确定的, Ml是候选集中包括的 CSI RS配置的个数。 例如, Ml与 M2的隐式对应关 系可以包括但不限于表 1所示内容。
表 1
Figure imgf000011_0001
具体地, 假设 Ml=3, 候选集包含 CSI RS Config.0、 CSI RS Config.l 和 CSIRSConfig.2。并且按照 UE测量的度量信息,对上述配置降序排列依 次为 CSI RS Config.0、 CSI RS Config.2和 CSI RS Config.L 则根据上述的 隐式对应关系, M2=2, 则从排序后的候选集中选择前 2个组成首选集, 即 首选集包括: CSIRSConfig.0、 CSI RS Config.2。
步骤 34: UE将 CSI RS配置首选集的信息发送给 eNB。
其中, 该首选集的信息可以为首选集中包括的 CSI RS配置; CSI RS 配置及对应的度量信息; CSIRS配置、 与指定的参考信号配置相对应的度 量信息以及其它参考信号配置对应的度量信息与所述指定的参考信号配置 对应度量信息的差分, 其中, 度量信息与 CSI RS配置对应; 或者 CSI RS 配置及 CSI RS配置对应的度量信息的差分。
进一步地, 对于首选集中包含的 CSIRS配置, 可以用以下组合索引 r r
Figure imgf000012_0001
其中 (1≤¾<M1; st<sl+l)含有 M2个首选集中包含的 csi RS配置的
索引,
Figure imgf000012_0002
x<y,其中 W为从 X项中选 择 y项的组合数。
具体地, 1) UE上报首选集中的每个 CSIRS配置。 例如, 上报首选集 中的每个 CSI RS配置包括 CSI RS Config.O和 CSI RS Config.2。
进一步地, UE上报首选集中的每个 CSI RS配置是有序的, 本发明实 施例中, 有序包括: 按照优先级顺序或者按照对应的度量信息值的顺序。 以按照度量信息值的顺序,且度量信息为 RSRP为例,如果 CSIRS Config.O 对应的 RSRP的值小于 CSI RS Config.2对应的 RSRP的值, 则 UE上报首 选集中的 CSI RS配置依次为 CSI RS Config.O和 CSI RS Config.2。
2) UE上报首选集中每个 CSIRS配置及对应的度量信息。 例如, 上报 CSI RS Config.O和 CSI RS Config.2以及对应的度量信息 MetricCSIRS cnflg.0 和 MetricCSI RS Config.2。
进一步地, UE上报首选集中的每个 CSI RS配置是有序的, 例如, UE 上报首选集中的 CSI RS配置依次为 CSI RS Config.O和 CSI RS Config.2并 且对应的度量信息 MetricCSI RS Config.O和 MetricCSI RS Config.2。
3 ) UE上报首选集中每个 CSI RS配置和部分 CSI RS配置的度量信息 及另外部分 CSI RS配置与该部分 CSI RS配置的度量信息的差分。 例如, 上报 CSI RS Config.O, CSI RS Config.2以及度量信息 MetricCSI RS Cnflg.Q和差 分度量 Metriccsi Rs c。nfig.2- MetricCSi RS c。nfig.。或者 MetricCSi RS c。nfig.。- MetricCSi RS
Config.2。
进一步地, UE上报首选集中的每个 CSI RS配置信息是有序的, 例如,
UE上报首选集中的 CSI RS配置依次为 CSI RS Config.O和 CSI RS Config.2 并且对应的度量信息 MetricCSI RS config.o和差分度量 MetricCSI RS cnflg.2- MetriccsiRs Config.O或者 MetricCSI RS Config.O" Metriccsi Rs Config,2。
4 ) UE上报首选集中每个 CSI RS配置及 CSI RS配置对应的度量信息 的差分。 例如, 上报 CSI RS Config.O和 CSI RS Config.2以及对应的差分度 量 Metriccsi RS c。nfig.2- MetricCSi RS config.o或者 MetricCSi RS c。nfig.o- MetricCSi RS
Config.2。
进一步地, UE上报首选集中的每个 CSI RS配置是有序的, 例如, UE 上报首选集中的 CSI RS配置依次为 CSI RS Config.O和 CSI RS Config.2以 及对应的差分度量 MetricCSI RS Config.2" MetriccsiRs Config.O或者 MetricCSI RS Config.O"
Metriccsi s Config.2。
步骤 35: eNB 4^据 CSI RS配置首选集的信息, 确定 CSI RS配置测量 集。
其中, 该测量集可以包括: 首选集, 首选集的子集, 首选集中 CSI RS 配置的配置组合, 或者, 首选集中 CSI RS配置的端口子集。
具体地, 1 )测量集与首选集相同。 例如, UE 上报的首选集的信息包括: CSI RS Config.O 和 CSI RS Config.2, 则测量集包括: CSI RS Config.O和 CSI RS Config.2。
2 ) 测量集是首选集的子集。
例如, UE 上报的首选集的信息包括: CSI RS Config.O 和 CSI RS Config.2, 则测量集可以包括: CSI RS Config.0。
或者, UE上报的首选集的信息包括: CSI RS Config.O, CSI RS Config.2, Metriccsi Rs c。nfig.o和 MetricCSI RS cnfig.2, 如果 MetricCSI RS config.2- MetricCSi RS c。nfig.。>= ThresholdMetnc, 则测量集可以包括: CSI RS Config.O 和 CSI RS Config.2, 否则测量集可以包括: CSI RS Config.0。
或者, UE上报的首选集的信息包括: CSI RS Config.O, CSI RS Config.2 和 MetricCSI RS config.2- Metriccsi RS c。nfig.o, 如果 MetricCSI RS config.2- MetricCSi RS co„fig.o >= ThresholdMetnc 则测量集可以包括: CSI RS Config.O和 CSI RS Config.2, 否则测量集可以包括: CSI RS Config.0。
其中, 上述的 ThresholdMetnc为预定义的门限, 例如 ThresholdMetnc = 0 或者 -5等。
3 ) 测量集包括首选集中 CSI RS配置的配置组合。
例如, 假定 UE上报的首选集的信息包括: CSI RS Config.O和 CSI RS Config.2,并且 CSI RS Config.O和 CSI RS Config.2均为 2端口的 CSI RS配 置。 而 CSI RS Config.O和 CSI RS Config.2占有的时间频率资源对应于某 4 端口的 CSI RS配置, 该 4端口的 CSI RS配置假定为 CSI RS Config.O' , 则 该测量集可以包含 CSI RS Config.0,。
4 )测量集包括首选集中 CSI RS配置的端口子集。 例如, 假定 UE上报 的首选集的信息包括: CSI RS Config.O且 CSI RS Config.O为 4端口的 CSI RS 配置。 而 CSI RS Config.O占有的时间频率资源对应于某两个 2端口的 CSI RS配置, 其中一个 2端口的 CSI RS配置假定为 CSI RS Config.O", 则该测 量集可以包含 CSI RS Config.O"„ 步骤 36: eNB将该 CSI RS配置测量集通知给 UE。 之后, UE可以根 据该 CSI RS配置测量集中每个 CSI RS配置进行 CSI测量。
本实施例通过 UE上报首选集, 可以使得 eNB为 UE配置合适的参考 信号, 使得 UE获取良好的信道条件。 另外, 本实施例通过 UE在候选集中 选择首选集, 可以约束候选集的大小, 有效降低 UE测量的实现复杂度。 并 且, 本实施例通过 UE反馈首选集, 该首选集可以约束大小, 则可以有效降 低 UE的反馈开销。 本实施例适用于 CSI RS配置的场景。
图 5为本发明配置参考信号的方法另一实施例的流程示意图, 图 6为 图 5对应的系统结构示意图。
参见图 6, 本实施例中, 该系统包括一个宏基站和 3个 RRH, 且共用 同一个小区 ID, 如 cell-id 1。 每个 RRH通过光纤与 eNB连接。 宏基站和 3 个 RRH的 CRS端口配置分别为 CRS Config.O, CRS Config.l , CRS Config.2, CRS Config.3。 需要说明的是, 本实施例中, 所述系统含有宏基站, 但是, 本发明实施例也可以应用在不含宏基站的场景, 例如, 系统只包括 RRH, 各个 RRH通过光纤或者其他介质与 eNB连接。 eNB可以位于宏基站处, 也可以位于 RHH处。
参见图 5, 本实施例包括:
步骤 51: UE获取 eNB配置的 CRS端口配置候选集, 该候选集中包括 一个或多个 CRS端口配置。
其中, UE可以采用如下方式获取该候选集: 1 )UE接收 PBCH( Physical Broadcast Channel,物理广播信道), UE采用自身的小区标识从接收的 PBCH 中获取对应的 CRS配置, 该 CRS配置即为 CRS端口配置的候选集。
例如,图 6中标识为 cell-id 1的小区配置了 CRS Config.O, CRS Config.l , CRS Config.2, CRS Config.3 , 其中每个配置各含有一个 CRS 端口, 上述 端口可以占用相同的时间 /频率资源位置, 也可以占用不同的时间 /频率资源 位置。 例如: 占用不同的资源位置, 则含有 4个 CRS端口, 与该 4个 CRS 端口对应的 CRS配置可以由 eNB通过 PBCH携带并由 UE接收。 例如: 共 占用两个不同的资源位置, 则含有 2个 CRS端口, 与该 2个 CRS端口对应 的 CRS配置可以由 eNB通过 PBCH携带并由 UE接收。
2 ) UE接收 eNB发送的广播消息, 所述广播消息中携带与小区标识对 应的候选集, UE利用自身的小区标识从接收到的广播消息中获取对应的候 选集;
3 ) UE接收 eNB发送的所述 UE特定的消息, 该 UE特定的消息中携 带候选集。
例如, 假定按照接收到的 SRS功率降低的顺序, 图 6中包括宏基站和 RRH在内的 4个 TP依次排列为宏基站、 RRH2、 RRH1和 RRH3。 此时, 如果确定候选集包括 2个 CRS端口配置, 则 eNB通过该 UE特定的消息通 知给 UE使用的候选集包含: CRS Config.O和 CRS Config.2; 如果确定候选 集包括 3 个 CRS 端口配置, eNB 通知给 UE使用的候选集包含: CRS Config.O, CRS Config.2和 CRS Config.l; 如果确定候选集包括 4个 CRS端 口配置, 则 eNB通知给 UE使用的候选集包含上述 4个 CRS端口配置。
优选地, 上述的候选集可以包括具有相同端口数的 CRS端口配置。 该 端口数可以为 1、 2、 4或 8。 例如, 设置的端口数为 2, 上述 4个 CRS端口 配置中, CRS Config.O和 CRS Config.l的端口数为 2,则上述的候选集包括: CRS Config.O和 CRS Config.l。
步骤 52: UE获取该 CRS端口配置候选集中每个 CRS端口配置对应的 度量信息。
该度量信息 MetricCRS可以包括如下项中的至少一项: RSRPCRS、 RSRQCRS、 RSSICRS或者 PL CRS。
度量信息的获取方式可以是:
1 ) RSRPCRS定义为基于 CRS端口配置得到的 RSRP, 该 RSRPCRS可以 基于 CRS端口配置中某一端口测量得到,也可以基于 CRS端口配置中多个 端口得到。
2 ) RSRQCRS定义为基于 CRS端口配置得到的 RSRQ, 该 1½1 00^可 以基于 CRS端口配置中某一端口测量得到,也可以基于 CRS端口配置中多 个端口得到
3 ) RSSICRS定义为基于 CRS端口配置得到的 RSSI, 该 RSSICRS可以基 于 CRS端口配置中某一端口测量得到,也可以基于 CRS端口配置中多个端 口得到
4 ) PLCRS定义为基于 CRS端口配置得到 PL, 该?!^^可以基于 CRS 端口配置中某一端口测量得到,也可以基于 CRS端口配置中多个端口得到。
步骤 53: UE根据该度量信息, 从 CRS端口配置候选集中依次按序选 取 M2个 CRS端口配置组成 CRS端口配置首选集。
其中, M2可以是 eNB通知给 UE的, 也可以是 UE根据 Ml确定的, Ml是候选集中包括的 CRS端口配置的个数。 例如, Ml与 M2的隐式对应 关系可以包括但不限于表 1所示内容。
表 1
Figure imgf000017_0001
具体地, 假设 Ml=3, 候选集包含 CRS Config.0、 CRS Config.l和 CRS Config.2。 并且按照 UE测量的度量信息, 对上述配置降序排列依次为 CRS Config.0、 CRS Config.2 和 CRS Config.L 则根据上述的隐式对应关系, M2=2,则从排序后的候选集中选择前 2个组成首选集,即首选集包括: CRS Config.0、 CRS Config.2„
步骤 54: UE将 CRS端口配置首选集的信息发送给 eNB。
其中, 该首选集的信息可以为首选集中包括的 CRS端口配置; CRS端 口配置及对应的度量信息; CRS端口配置、 指定的 CRS端口配置相对应的 度量信息以及其它 CRS端口配置对应的度量信息与所述指定的 CRS端口配 置对应的度量信息的差分度量信息,其中,度量信息与 CRS端口配置对应; 或者 CRS端口配置及 CRS端口配置对应的度量信息的差分度量信息。
进一步地, 对于首选集中包含的 CRS配置, 可以用以下组合索引 r
Figure imgf000018_0001
其中 hL> , (1≤¾ < Μ1 ; sl < Sl+l ) 含有 Μ2个首选集中包含的 CRS配置的索
X > y
引, \ M2 _'/为扩展二项系数,定义为 \y/ 0 x < y ,其中 w为从 x项中选择 y 项的组合数。
具体地, 1 ) UE上报首选集中的每个 CRS端口配置。 例如, 上报首选 集中的每个 CRS端口配置包括 CRS Config.O和 CRS Config.2。
进一步地, UE上报首选集中的每个 CRS端口配置是有序的, 本发明 实施例中, 有序包括: 按照优先级顺序或者按照对应的度量信息值的顺序。 以按照度量信息值的顺序, 且度量信息为 RSRP为例, 如果 CRS Config.O 对应的 RSRP的值小于 CRS Config.2对应的 RSRP的值,则 UE上报首选集 中的 CRS端口配置依次为 CRS Config.O和 CRS Config.2。
2 ) UE上报首选集中每个 CRS端口配置及对应的度量信息。 例如, 上 报 CRS Config.O和 CRS Config.2以及对应的度量信息 MetricCRS cnflg.0
MetnccRs config.2。
进一步地, UE上报首选集中的每个 CRS端口配置是有序的, 例如, UE上报首选集中的 CRS端口配置依次为 CRS Config.O和 CRS Config.2并 且对应的度量信息 MetricCSI RS Config.O和 MetricCSI RS Config.2。
3 )UE上报首选集中每个 CRS端口配置和指定的 CRS端口配置的度量 信息及其它 CRS端口配置与指定的 CRS端口配置的度量信息的差分。例如, 上报 CRS Config.O, CRS Config.2以及度量信息 MetricCRS Cnflg.Q和差分度量
MetriccRs Config.2" MetriccRs config.o或者 MetricCRs config.o- MetricCRs Config.2。
进一步地, UE上报首选集中的每个 CRS端口配置是有序的, 例如, UE上报首选集中的 CRS端口配置依次为 CRS Config.O和 CRS Config.2并 且对应的度量信息 MetricCRS cnfig.o和差分度量 MetricCRS cnfig.2- MetricCRS config.o或者 MetriccRs config.o- MetricCRs Config.2。
4 )UE上报首选集中每个 CRS端口配置及 CRS端口配置对应的度量信 息的差分。 例如, 上报 CRS Config.O和 CRS Config.2以及对应的差分度量
MetriccRs Config.2" MetricCRS CnfigO或者 MetriccRs config.o- MetricCRS Config.2。
进一步地, UE上报首选集中的每个 CRS端口配置是有序的, 例如,
UE上 ^艮首选集中的 CRS端口配置依次为 CRS Config.O和 CRS Config.2以 及对应的差分度量 MetricCRS config.2- MetricCRS Config.o或者 MetricCRS cnfig.o- MetriccRs Config.2。
步骤 55: eNB根据 CRS端口配置首选集的信息, 确定 CRS端口配置 测量集, 并将该 CRS端口配置测量集通知给 UE。
其中, 该测量集可以包括: 首选集, 首选集的子集, 或者, 首选集中 CRS端口配置的端口子集。
具体地, 1 )测量集与首选集相同。
例如, UE上报的首选集的信息包括: CRS Config.O和 CRS Config.2, 则测量集包括: CRS Config.O和 CRS Config.2。
2 ) 测量集是首选集的子集。
例如, UE上报的首选集的信息包括: CRS Config.O和 CRS Config.2, 则测量集可以包括: CRS Config.0。
或者, UE上报的首选集的信息包括: CRS Config.O, CRS Config.2, MetriccRs config.o和 MetricCRS Config.2, 如果 MetricCRS Config.2- MetricCRS Config.0〉= ThresholdMetnc 则测量集可以包括: CRS Config.O和 CRS Config.2, 否则测 量集可以包括: CRS Config.0。
或者, UE上报的首选集的信息包括: CRS Config.0、 CRS Config.2和
MetriccRs Config.2" MetriccRs config.O ' 如果 MetricCRs Config.2" MetriccRs Config.O >— ThresholdMetnc, 则测量集可以包括: CRS Config.O和 CRS Config.2, 否则测 量集可以包括: CRS Config.0。
其中, 上述的 ThresholdMetnc为预定义的门限,例如 ThresholdMetnc = 0或 者 -5。
3 )测量集包括首选集中 CRS端口配置的端口子集。 例如, 假定 UE上 报的首选集的信息包括: CRS Config.O且 CRS Config.O为 4端口的 CRS端 口配置。 而 CRS Config.O占有的时间频率资源对应于某 2端口的 CRS端口 配置, 该 2端口的 CRS端口配置^ ^定为 CRS Config.O", 则该测量集可以包 含 CRS Config.O"„
步骤 56: eNB将该 CRS端口配置测量集通知给 UE。
本实施例通过 UE上报首选集, 可以使得 eNB为 UE配置合适的参考 信号, 使得 UE获取良好的信道条件。 另外, 本实施例通过 UE在候选集中 选择首选集, 可以约束候选集的大小, 有效降低 UE测量的实现复杂度。 并 且, 本实施例通过 UE反馈首选集, 该首选集可以约束大小, 则可以有效降 低 UE的反馈开销。 本实施例适用于 CRS端口配置的场景。
图 7为本发明提供的 UE—实施例的结构示意图, 包括发送单元 71和 第一接收单元 72; 发送单元 71用于确定参考信号配置首选集, 并将所述参 考信号配置首选集的信息发送给 eNB; 第一接收单元 72用于接收 eNB发 送的参考信号配置测量集, 所述参考信号配置测量集是所述 eNB根据所述 参考信号配置首选集的信息配置,所述参考信号配置测量集用于 UE测量并 反馈信道状态信息。
进一步地, 还可以包括: 第二接收单元, 用于获取参考信号配置候选 集, 以便根据所述参考信号配置候选集确定所述参考信号配置首选集。 进一步地, 所述第二接收单元获取的所述参考信号配置候选集中包括 的每个参考信号配置的端口数相同。
进一步地, 所述第二接收单元获取的所述参考信号配置候选集中包括: 具有相同小区标识的参考信号配置, 所述具有相同小区标识的参考信号配 置占用的资源互不重叠。
所述发送单元可以具体用于: 将所述参考信号配置首选集中包括的参 考信号配置发送给 eNB; 或者, 将所述参考信号配置首选集中包括的参考 信号配置及参考信号配置对应的度量信息发送给 eNB; 或者, 将所述参考 信号配置首选集中包括的参考信号配置、 指定的参考信号配置的度量信息 及其它参考信号配置的度量信息与所述指定的参考信号配置的度量信息的 差分度量信息发送给 eNB; 或者, 将所述参考信号配置首选集中包括的参 考信号配置、 参考信号配置对应的度量信息的差分度量信息发送给 eNB。
进一步地, 所述发送单元发送的所述参考信号配置首选集的信息中包 括的所述参考信号配置是有序的。
进一步地, 所述第一接收单元接收的所述参考信号配置测量集与所述 参考信号配置首选集相同; 或者, 所述第一接收单元接收的所述参考信号 配置测量集为所述参考信号配置首选集的子集; 或者, 所述第一接收单元 接收的所述参考信号配置测量集包括所述参考信号配置首选集中的参考信 号配置组合得到的参考信号配置; 或者, 所述第一接收单元接收的所述参 考信号配置测量集包括所述参考信号配置首选集中的参考信号配置的端口 子集。
进一步地, 所述第一接收单元接收的所述参考信号配置测量集包括的 所述组合得到的参考信号配置所占的资源与组合前的至少两个的参考信号 配置所占的资源相同, 所述资源包括如下项中的至少一项: 时间资源、 频 率资源、 序列资源或者 OCC资源; 或者, 所述第一接收单元接收的所述参 考信号配置测量集包括的所述端口子集所占的资源与一个参考信号配置所 占的资源相同, 所述资源包括如下项中的至少一项: 时间资源、 频率资源、 序列资源或者 OCC资源。
上述的发送单元可以采用如下方式根据第一接收单元接收的所述参考 信号配置候选集确定所述参考信号配置首选集: 测量所述参考信号配置候 选集中每个参考信号配置对应的度量信息, 并确定所述参考信号配置首选 集中包括的参考信号配置的个数; 根据所述度量信息, 依次按序从所述参 考信号配置候选集中选取所述个数的参考信号配置, 组成所述参考信号配 置首选集。
上述确定的所述参考信号配置首选集中包括的参考信号配置的个数可 以采用如下方式: 根据所述参考信号候选集中包括的参考信号配置的个数, 以及所述参考信号候选集中包括的参考信号配置的个数与所述参考信号配 置首选集中包括的参考信号配置的个数的隐式对应关系, 确定所述参考信 号配置首选集中包括的参考信号配置的个数; 或者, 接收所述 eNB发送的 通知消息, 所述通知消息中携带所述参考信号配置首选集中包括的参考信 号配置的个数。
上述的第二接收单元可以具体用于: 接收 eNB发送的广播消息, 所述 广播消息中携带与小区标识对应的参考信号候选集,所述 UE根据自身的小 区标识获取对应的参考信号候选集; 或者, 接收 eNB发送的所述 UE特定 的消息, 所述 UE特定的消息中携带所述参考信号候选集。
上述的参考信号配置可以包括: CSI RS配置或者 CRS端口配置,其中, 所述 CRS端口配置是指由 CRS配置中全部或部分端口子集构成的配置。
上述的度量信息可以包括如下项中的至少一项: RSRP、 RSRQ、 RSSI 或者路径损耗。
上述的相同的端口数可以为: 1、 2、 4或 8。
本实施例通过 UE上报首选集, 可以使得 eNB为 UE配置合适的参考 信号, 使得 UE获取良好的信道条件。 另外, 本实施例通过 UE在候选集中 选择首选集, 可以约束候选集的大小, 有效降低 UE测量的实现复杂度。 并 且, 本实施例通过 UE反馈首选集, 该首选集可以约束大小, 则可以有效降 低 UE的反馈开销。
图 8为本发明提供的 eNB—实施例的结构示意图, 包括接收单元 81 和第一发送单元 82; 接收单元 81用于接收 UE发送的参考信号配置首选集 的信息; 第一发送单元 82用于根据所述参考信号配置首选集的信息配置参 考信号配置测量集, 并将所述参考信号配置测量集发送给 UE, 所述参考信 号配置测量集用于 UE测量并反馈信道状态信息。
进一步地, 还可以包括: 第二发送单元, 用于向 UE发送参考信号配置 候选集,以便所述 UE根据所述参考信号配置候选集确定所述参考信号配置 首选集。
进一步地, 所述第二发送单元发送的所述参考信号配置候选集中包括 的每个参考信号配置的端口数相同。
进一步地, 所述第二发送单元发送的所述参考信号配置候选集中包括: 具有相同小区标识的参考信号配置, 所述具有相同小区标识的参考信号配 置占用的资源互不重叠。
可以是, 所述接收单元接收的所述参考信号配置首选集的信息包括: 所述参考信号配置首选集中包括的参考信号配置; 所述参考信号配置首选 集中包括的参考信号配置及参考信号配置对应的度量信息; 所述参考信号 配置首选集中包括的参考信号配置、 指定的参考信号配置的度量信息及其 它参考信号配置的度量信息与所述指定的参考信号配置的度量信息的差分 度量信息; 或者, 所述参考信号配置首选集中包括的参考信号配置、 参考 信号配置对应的度量信息的差分度量信息。
进一步地, 所述接收单元接收的所述参考信号配置首选集的信息包括 的所述参考信号配置是有序的。
可以是, 所述第一发送单元发送的所述参考信号配置测量集与所述参 考信号配置首选集相同; 或者, 所述第一发送单元发送的所述参考信号配 置测量集为所述参考信号配置首选集的子集; 或者, 所述第一发送单元发 送的所述参考信号配置测量集包括所述参考信号配置首选集中的参考信号 配置组合得到的参考信号配置; 或者, 所述第一发送单元发送的所述参考 信号配置测量集包括所述参考信号配置首选集中的参考信号配置的端口子 集。
进一步地, 所述第一发送单元发送的所述参考信号配置测量集包括的 所述组合得到的参考信号配置所占的资源与组合前的至少两个的参考信号 配置所占的总资源相同, 所述资源包括: 时间资源、 频率资源或者序列资 源或者 OCC资源; 或者, 所述第一发送单元发送的所述参考信号配置测量 集包括的所述端口子集所占的资源是一个参考信号配置所占资源的部分或 者全部,所述资源包括: 时间资源、频率资源或者序列资源或者 OCC资源。
上述的度量信息可以如下项中的至少一项: RSRP、 RSRQ、 RSSI或者 路径损耗。
上述的 eNB可以位于宏基站处, 或者位于 RRH处。
本实施例通过 UE上报首选集, 可以使得 eNB为 UE配置合适的参考 信号, 使得 UE获取良好的信道条件。 另外, 本实施例通过 UE在候选集中 选择首选集, 可以约束候选集的大小, 有效降低 UE测量的实现复杂度。 并 且, 本实施例通过 UE反馈首选集, 该首选集可以约束大小, 则可以有效降 低 UE的反馈开销。 本实施例适用于 CSI RS配置的场景。
可以理解的是, 上述方法及设备中的相关特征可以相互参考。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成, 前述的程序可以存储于计算机可 读取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而 前述的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代 码的介质。 最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修 改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种配置参考信号的方法, 其特征在于, 包括:
用户设备 UE确定参考信号配置首选集,并将所述参考信号配置首选集 的信息发送给演进节点 B eNB;
UE接收 eNB发送的参考信号配置测量集, 所述参考信号配置测量集 是所述 eNB根据所述参考信号配置首选集的信息配置, 所述参考信号配置 测量集用于 UE测量并反馈信道状态信息。
2、 根据权利要求 1所述的方法, 其特征在于, 所述 UE确定参考信号 配置首选集之前, 所述方法还包括:
UE获取参考信号配置候选集, 以便根据所述参考信号配置候选集确定 所述参考信号配置首选集。
3、 根据权利要求 2所述的方法, 其特征在于, 所述参考信号配置候选 集中包括的每个参考信号配置的端口数相同。
4、 根据权利要求 2或 3所述的方法, 其特征在于, 所述参考信号配置 候选集中包括: 具有相同小区标识的参考信号配置, 所述具有相同小区标 识的参考信号配置占用的资源互不重叠。
5、 根据权利要求 2或 3所述的方法, 其特征在于, 所述根据所述参考 信号配置候选集确定所述参考信号配置首选集, 包括:
测量所述参考信号配置候选集中每个参考信号配置对应的度量信息, 并确定所述参考信号配置首选集中包括的参考信号配置的个数;
根据所述度量信息, 依次按序从所述参考信号配置候选集中选取所述 个数的参考信号配置, 组成所述参考信号配置首选集。
6、 根据权利要求 5所述的方法, 其特征在于, 所述确定所述参考信号 配置首选集中包括的参考信号配置的个数, 包括:
根据所述参考信号候选集中包括的参考信号配置的个数, 以及所述参 考信号候选集中包括的参考信号配置的个数与所述参考信号配置首选集中 包括的参考信号配置的个数的隐式对应关系, 确定所述参考信号配置首选 集中包括的参考信号配置的个数;
或者,
接收所述 eNB发送的通知消息, 所述通知消息中携带所述参考信号配 置首选集中包括的参考信号配置的个数。
7、 根据权利要求 1-3任一项所述的方法, 其特征在于, 所述将所述参 考信号配置首选集的信息发送给 eNB, 包括:
将所述参考信号配置首选集中包括的参考信号配置发送给 eNB; 或者, 将所述参考信号配置首选集中包括的参考信号配置及参考信号配置对 应的度量信息发送给 eNB; 或者,
将所述参考信号配置首选集中包括的参考信号配置、 与所述参考信号 配置首选集中指定的参考信号配置相对应的度量信息以及所述参考信号配 置首选集中其它参考信号配置对应的度量信息与所述指定的参考信号配置 对应的度量信息的差分度量信息发送给 eNB; 或者,
将所述参考信号配置首选集中包括的参考信号配置、 参考信号配置对 应的度量信息的差分度量信息发送给 eNB。
8、 根据权利要求 7所述的方法, 其特征在于, 所述参考信号配置首选 集的信息中每个参考信道配置是有序的。
9、 根据权利要求 1-3任一项所述的方法, 其特征在于,
所述参考信号配置测量集与所述参考信号配置首选集相同; 或者, 所述参考信号配置测量集为所述参考信号配置首选集的子集; 或者, 所述参考信号配置测量集包括所述参考信号配置首选集中的参考信号 配置组合得到的参考信号配置; 或者,
所述参考信号配置测量集包括所述参考信号配置首选集中的参考信号 配置的端口子集。
10、 根据权利要求 9所述的方法, 其特征在于, 所述组合得到的参考信号配置所占的资源与组合前的至少两个的参考 信号配置所占的总资源相同, 所述资源包括如下项中的至少一项: 时间资 源、 频率资源、 序列资源或者正交掩码 OCC资源;
或者,
所述端口子集所占的资源是一个参考信号配置所占的资源的部分或者 全部, 所述资源包括如下项中的至少一项: 时间资源、 频率资源、 序列资 源或者 OCC资源。
11、根据权利要求 2或 3所述的方法, 其特征在于, 所述 UE获取参考 信号配置候选集, 包括:
UE接收 eNB发送的广播消息, 所述广播消息中携带与小区标识对应 的参考信号候选集,所述 UE根据自身的小区标识获取对应的参考信号候选 集;
或者,
UE接收 eNB发送的所述 UE特定的消息, 所述 UE特定的消息中携带 所述参考信号候选集。
12、根据权利要求 1-3任一项所述的方法, 其特征在于, 所述参考信号 配置包括:信道状态信息参考信号 CSI RS配置或者小区特定参考信号 CRS 端口配置, 其中, 所述 CRS端口配置是指由 CRS配置中全部或部分端口子 集构成的配置。
13、 根据权利要求 5所述的方法, 其特征在于, 所述度量信息包括如 下项中的至少一项: 参考信号接收功率 RSRP、 参考信号接收质量 RSRQ、 接收信号强度指示 RSSI或者路径损耗。
14、 根据权利要求 3所述的方法, 其特征在于, 所述端口数为: 1、 2、 4或 8。
15、 一种配置参考信号的方法, 其特征在于, 包括:
演进节点 B eNB接收用户设备 UE发送的参考信号配置首选集的信息; eNB 根据所述参考信号配置首选集的信息配置参考信号配置测量集, 并将所述参考信号配置测量集发送给 UE, 所述参考信号配置测量集用于 UE测量并反馈信道状态信息。
16、 根据权利要求 15所述的方法, 其特征在于, 还包括:
eNB向 UE发送参考信号配置候选集,以便所述 UE根据所述参考信号 配置候选集确定所述参考信号配置首选集。
17、 根据权利要求 16所述的方法, 其特征在于, 所述参考信号配置候 选集中包括的每个参考信号配置的端口数相同。
18、根据权利要求 15-17任一项所述的方法, 其特征在于, 所述参考信 号配置首选集的信息包括: 所述参考信号配置首选集中包括的参考信号配 置; 所述参考信号配置首选集中包括的参考信号配置及参考信号配置对应 的度量信息; 所述参考信号配置首选集中包括的参考信号配置、 与参考信 号配置首选集中指定的参考信号配置相对应的度量信息及参考信号配置首 选集中其它参考信号配置对应的度量信息与所述指定的参考信号配置对应 的度量信息的差分度量信息, 所述度量信息与参考信号配置对应; 或者, 所述参考信号配置首选集中包括的参考信号配置、 参考信号配置对应的度 量信息的差分度量信息。
19、 根据权利要求 18所述的方法, 其特征在于, 所述参考信号配置首 选集的信息中每个参考信号配置是有序的。
20、 根据权利要求 15-17任一项所述的方法, 其特征在于,
所述参考信号配置测量集与所述参考信号配置首选集相同; 或者, 所述参考信号配置测量集为所述参考信号配置首选集的子集; 或者, 所述参考信号配置测量集包括所述参考信号配置首选集中的参考信号 配置组合得到的参考信号配置; 或者,
所述参考信号配置测量集包括所述参考信号配置首选集中的参考信号 配置的端口子集。
21、 根据权利要求 20所述的方法, 其特征在于,
所述组合得到的参考信号配置所占的资源与组合前的至少两个的参考 信号配置所占的总资源相同, 所述资源包括如下项中的至少一项: 时间资 源、 频率资源、 序列资源或者正交掩码 OCC资源;
或者,
所述端口子集所占的资源是一个参考信号配置所占的资源的部分或者 全部, 所述资源包括如下项中的至少一项: 时间资源、 频率资源、 序列资 源或者 OCC资源。
22、 根据权利要求 18所述的方法, 其特征在于, 所述度量信息包括如 下项中的至少一项: 参考信号接收功率 RSRP、 参考信号接收质量 RSRQ、 接收信号强度指示 RSSI或者路径损耗。
23、 根据权利要求 15-17任一项所述的方法, 其特征在于, 所述 eNB 位于宏基站处, 或者位于远端射频头 RRH处。
24、 一种用户设备 UE, 其特征在于, 包括:
发送单元, 用于确定参考信号配置首选集, 并将所述参考信号配置首 选集的信息发送给演进节点 B eNB;
第一接收单元, 用于接收 eNB发送的参考信号配置测量集, 所述参考 信号配置测量集是所述 eNB根据所述参考信号配置首选集的信息配置, 所 述参考信号配置测量集用于 UE测量并反馈信道状态信息。
25、 根据权利要求 24所述的 UE, 其特征在于, 还包括:
第二接收单元, 用于获取参考信号配置候选集, 以便根据所述参考信 号配置候选集确定所述参考信号配置首选集。
26、 根据权利要求 25所述的 UE, 其特征在于, 所述第二接收单元获 取的所述参考信号配置候选集中包括的每个参考信号配置的端口数相同。
27、 根据权利要求 24-26任一项所述的 UE, 其特征在于, 所述发送单 元具体用于: 将所述参考信号配置首选集中包括的参考信号配置发送给 eNB; 或者, 将所述参考信号配置首选集中包括的参考信号配置及参考信号配置对 应的度量信息发送给 eNB; 或者,
将所述参考信号配置首选集中包括的参考信号配置、 与参考信号配置 首选集中指定的参考信号配置相对应的度量信息以及参考信号配置首选集 中其它参考信号配置对应的度量信息与所述指定的参考信号配置对应的度 量信息的差分度量信息发送给 eNB; 或者,
将所述参考信号配置首选集中包括的参考信号配置、 参考信号配置对 应的度量信息的差分度量信息发送给 eNB。
28、 根据权利要求 27所述的 UE, 其特征在于, 所述发送单元发送的 所述参考信号配置首选集的信息中包括的每个参考信号配置是有序的。
29、 根据权利要求 24-26任一项所述的 UE, 其特征在于, 所述第一接 收单元接收的所述参考信号配置测量集与所述参考信号配置首选集相同; 或者,
所述第一接收单元接收的所述参考信号配置测量集为所述参考信号配 置首选集的子集; 或者,
所述第一接收单元接收的所述参考信号配置测量集包括所述参考信号 配置首选集中的参考信号配置组合得到的参考信号配置; 或者,
所述第一接收单元接收的所述参考信号配置测量集包括所述参考信号 配置首选集中的参考信号配置的端口子集。
30、 根据权利要求 29所述的 UE, 其特征在于, 所述第一接收单元接 收的所述参考信号配置测量集包括的所述组合得到的参考信号配置所占的 资源与组合前的至少两个的参考信号配置所占的总资源相同, 所述资源包 括如下项中的至少一项:时间资源、频率资源、序列资源或者正交掩码 OCC 资源;
或者, 所述第一接收单元接收的所述参考信号配置测量集包括的所述端口子 集所占的资源是一个参考信号配置所占资源的部分或者全部, 所述资源包 括如下项中的至少一项: 时间资源、 频率资源、 序列资源或者 OCC资源。
31、 一种演进节点 B eNB, 其特征在于, 包括:
接收单元, 用于接收用户设备 UE发送的参考信号配置首选集的信息; 第一发送单元, 用于根据所述参考信号配置首选集的信息配置参考信 号配置测量集, 并将所述参考信号配置测量集发送给用户设备 UE, 所述参 考信号配置测量集用于 UE测量并反馈信道状态信息。
32、 根据权利要求 31所述的 eNB, 其特征在于, 还包括:
第二发送单元, 用于向 UE发送参考信号配置候选集, 以便所述 UE根 据所述参考信号配置候选集确定所述参考信号配置首选集。
33、 根据权利要求 32所述的 eNB, 其特征在于, 所述第二发送单元发 送的所述参考信号配置候选集中包括的每个参考信号配置的端口数相同。
34、 根据权利要求 31-33任一项所述的 eNB, 其特征在于, 所述接收 单元接收的所述参考信号配置首选集的信息包括: 所述参考信号配置首选 集中包括的参考信号配置; 所述参考信号配置首选集中包括的参考信号配 置及参考信号配置对应的度量信息; 所述参考信号配置首选集中包括的参 考信号配置、 与参考信号配置首选集中指定的参考信号配置相对应的度量 信息以及参考信号配置首选集中其它参考信号配置对应的度量信息与所述 指定的参考信号配置对应的度量信息的差分度量信息; 或者, 所述参考信 号配置首选集中包括的参考信号配置、 参考信号配置对应的度量信息的差 分度量信息。
35、 根据权利要求 34所述的 eNB, 其特征在于, 所述接收单元接收的 所述参考信号配置首选集的信息包括的每个参考信号配置是有序的。
36、 根据权利要求 31-33任一项所述的 eNB, 其特征在于,
所述第一发送单元发送的所述参考信号配置测量集与所述参考信号配 置首选集相同; 或者,
所述第一发送单元发送的所述参考信号配置测量集为所述参考信号配 置首选集的子集; 或者,
所述第一发送单元发送的所述参考信号配置测量集包括所述参考信号 配置首选集中的参考信号配置组合得到的参考信号配置; 或者,
所述第一发送单元发送的所述参考信号配置测量集包括所述参考信号 配置首选集中的参考信号配置的端口子集。
37、 根据权利要求 36所述的 eNB , 其特征在于, 所述第一发送单元发 送的所述参考信号配置测量集包括的所述组合得到的参考信号配置所占的 资源与组合前的至少两个的参考信号配置所占的总资源相同, 所述资源包 括如下项中的至少一项:时间资源、频率资源、序列资源或者正交掩码 OCC 资源;
或者,
所述第一发送单元发送的所述参考信号配置测量集包括的所述端口子 集所占的资源是一个参考信号配置所占资源的部分或者全部, 所述资源包 括如下项中的至少一项: 时间资源、 频率资源、 序列资源或者 OCC资源。
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