WO2013086954A1 - 信道状态信息的获取方法及装置 - Google Patents

信道状态信息的获取方法及装置 Download PDF

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Publication number
WO2013086954A1
WO2013086954A1 PCT/CN2012/086235 CN2012086235W WO2013086954A1 WO 2013086954 A1 WO2013086954 A1 WO 2013086954A1 CN 2012086235 W CN2012086235 W CN 2012086235W WO 2013086954 A1 WO2013086954 A1 WO 2013086954A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
reference resource
csi
measurement reference
transmission point
Prior art date
Application number
PCT/CN2012/086235
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English (en)
French (fr)
Inventor
夏亮
周明宇
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 EP12857968.7A priority Critical patent/EP2779508B1/en
Publication of WO2013086954A1 publication Critical patent/WO2013086954A1/zh
Priority to US14/305,279 priority patent/US20140293815A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Definitions

  • the present invention relates to the field of communication systems, and in particular, to a method and an apparatus for acquiring channel state information. Background technique
  • each user equipment In a conventional wireless communication system, each user equipment (User Equipment, UE) generally only receives data and signaling information transmitted from one cell, where each cell includes one or more transmission points with transceivers, and one has transmission and reception.
  • the transmission point of the device may correspond to one or more antennas.
  • the skilled person can easily understand that the "cell” or “cell corresponding transmission point” hereinafter means the same meaning.
  • the base station needs to know the channel state information (CSI) of the wireless channel between the transmission point and the UE, and the information is often the reference signal sent by the UE to the transmission point (Reference Signal) , RS) performs measurement and feeds back the measurement result to the base station to obtain an RS, such as CSI-RS in the LTE-Advanced ( further evolution of LTE) system.
  • CSI channel state information
  • the base station responsible for scheduling needs to know the wireless between multiple transmission points and the UE.
  • the base station sends information of one RS pattern and information of a set of RS available resources to the UE.
  • the transmission point 1 transmits the RS according to the RS pattern, and the transmission point 2 is not sent according to the RS pattern.
  • the first resource is a non-empty subset of the set of RS available resources; in the second resource, the transmission point 2 transmits an RS according to the RS pattern, and the transmission point 1 is not sent according to the RS pattern.
  • the second resource is a non-empty subset of the set of RS available resources; the UE is in the two resources
  • the RS is measured according to the RS pattern, and the measurement result is fed back; the base station receives the measurement result fed back by the UE, and obtains the CS I between the transmission point 1 and the transmission point 2 and the UE.
  • the CS I of the wireless channel between the different transmission points and the UE can be obtained, the CSI of the two resources shares the same feedback mechanism and feeds back to the base station, causing the user equipment to feed back the CSI to the base station. Inflexible problem.
  • Embodiments of the present invention provide a method and an apparatus for acquiring channel state information, which solves the problem that the feedback mechanism is inflexible when the CSI of the wireless channel between different transmission points and user equipment is obtained.
  • a method for obtaining channel state information includes:
  • the user equipment receives the at least two channel state information CS I measurement reference resource sets sent by the base station, where the reference signal RS resources included in the different CSI measurement reference resource sets are different from each other, and the different CSI measurement reference resource sets include different RSs.
  • RS feature the RS included in the same CSI measurement reference resource set has the same RS feature;
  • the user equipment feeds back the measurement result to the base station by using the feedback mechanism, where the measurement result is any one of at least two transmission points corresponding to each of the CS I measurement reference resource sets respectively.
  • the measurement result is any one of at least two transmission points corresponding to each of the CS I measurement reference resource sets respectively.
  • a CS I between the user equipment, the transmission point being a device that provides a service to the user equipment.
  • a user equipment including:
  • a receiving unit configured to receive at least two channel state information CS I measurement reference resource sets sent by the base station, where the reference signal RS resources included in different CSI measurement reference resource sets are different from each other, and the different CSI measurement reference resource sets are included RS has different RS characteristics, the same CSI test
  • the RSs contained in the set of reference resource sets have the same RS characteristics
  • a measurement acquiring unit configured to measure, according to each of the at least two CSI measurement reference resource sets received by the receiving unit, a CS I corresponding to each of the CSI measurement reference resource sets, And obtaining a feedback mechanism corresponding to each of the CS I measurement reference resource sets respectively;
  • a feedback unit configured to feed back, by the feedback mechanism, the measurement mechanism, the measurement result to the base station, where the measurement result is at least two transmission points respectively corresponding to each of the CS I measurement reference resource sets Any transmission point or transmission point combination with the CS I between the user equipment, the transmission point being a device that provides a service to the user equipment.
  • Another method for obtaining channel state information includes:
  • the base station sends at least two channel state information CS I measurement reference resource sets to the user equipment, so that the user equipment measures each of the CSI measurement reference sets according to the at least two CSI measurement reference resource sets, respectively a CS I measures a CS I corresponding to the reference resource set, and obtains a feedback mechanism corresponding to each of the CS I measurement reference resource sets respectively;
  • the base station Receiving, by the base station, a measurement result that is sent back by the user equipment to the base station by using the feedback mechanism, where the measurement result is any one of at least two transmission points corresponding to each of the CSI measurement reference resource sets respectively. Or a CSI between the transmission point combination and the user equipment, where the transmission point is a device that provides a service to the user equipment.
  • a base station comprising:
  • a sending unit configured to send, to the user equipment, at least two channel state information CS I measurement reference resource sets, so that the user equipment determines, according to each of the at least two CS I measurement reference resource sets, a reference set, respectively Measure a CS I corresponding to each of the CSI measurement reference resource sets, and obtain a feedback mechanism corresponding to each of the CS I measurement reference resource sets respectively;
  • a receiving unit configured to receive the user equipment by using the user equipment Obtaining a measurement result fed back by the feedback mechanism to the receiving unit, where the measurement result is any one of at least two transmission points or a transmission point combination corresponding to each of the CSI measurement reference resource sets respectively
  • the CSI between the user equipments, where the transmission point is a device that provides services to the user equipment.
  • the method and device for acquiring channel state information provided by the embodiment of the present invention, first, the user equipment receives at least two channel state information CS I measurement reference resource sets sent by the base station; and then the user equipment according to the at least two channel state information CSI Measuring each CSI measurement reference set in the reference resource set, respectively measuring CSI between the transmission point or/and the transmission point combination corresponding to each CSI measurement reference resource set and the user equipment, and acquiring and satisfying And a feedback mechanism in which the transmission point or/and the transmission point combination is the same or different from the CSI requirement between the user equipment; and finally the user equipment feeds back the measurement result to the base station by using the same or different feedback mechanism.
  • the feedback mechanism is inflexible when the user equipment feeds back the measurement result to the base station.
  • the solution provided by the embodiment of the present invention solves the feedback mechanism by using the user equipment according to the different requirements of the CSI for the feedback mechanism between the different transmission points and the user equipment corresponding to the CSI measurement reference resource set sent by the base station, and solves the prior art user equipment.
  • the feedback mechanism is not flexible when feeding back the measurement results to the base station.
  • FIG. 1 is a flowchart of a method for acquiring channel state information according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another method for acquiring channel state information according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 5 is a configuration diagram of a transmission time of a reference signal according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a pattern of transmitting an RS on a first RS resource by a transmission point 1 according to an embodiment of the present invention
  • FIG. 7 is a diagram of a pattern of transmitting an RS on a first RS resource according to an embodiment of the present invention
  • FIG. The transmission point 1 provided by the embodiment sends a pattern of the RS on the second RS resource
  • FIG. 9 is a diagram of a pattern of transmitting an RS on a second RS resource by a transmission point 2 according to an embodiment of the present invention
  • FIG. 10 is a diagram of a pattern of transmitting an RS on a first RS resource according to an embodiment of the present invention
  • FIG. The transmission point 1 provided by the example transmits the pattern of the RS on the second RS resource.
  • FIG. 12 is a diagram of the transmission point 2 transmitting the RS on the second RS resource according to the embodiment of the present invention.
  • FIG. 1 is a diagram of a method for obtaining channel state information according to an embodiment of the present invention, where the method includes:
  • the user equipment receives at least two channel state information sent by the base station, and the CSI measurement reference resource set.
  • the reference signal RS resources included in the different CSI measurement reference resource sets are different from each other, and the RSs included in the different CSI measurement reference resource sets have different RS features, and the RSs included in the same CSI measurement reference resource set have the same RS.
  • the RS resource is a resource that includes a time dimension of the RS (such as a subframe) or a resource that is a frequency dimension (such as a subband); the RS feature includes a transmission point that sends the RS, and a configuration of the RS.
  • the configuration of the RS includes an RS antenna interface number, an RS pilot pattern, an RS period, and an RS subframe offset.
  • the user equipment measures, according to each CSI measurement reference set in the at least two CS I measurement reference resource sets, CSI corresponding to each CSI measurement reference resource set, and acquires each CSI measurement.
  • the feedback mechanism corresponding to the set of reference resources respectively.
  • the corresponding CS I measurement reference set in the two CS I measurement reference resource sets corresponds to
  • the feedback mechanisms are the same or different.
  • the feedback mechanism may include a feedback mode, a feedback period, a frequency domain granularity, feedback trigger signaling, and the like.
  • the user equipment feeds back a measurement result to the base station by using the feedback mechanism.
  • the measurement result may be between any one of the at least two transmission points corresponding to each of the CS I measurement reference resource sets and the transmission point combination with the user equipment.
  • the CSI is a device that provides a service to the user equipment.
  • the transmission point may be a device such as an antenna.
  • transmission point 1 there are two transmission points, transmission point 1 and transmission point 2, respectively.
  • a plurality of RS transmission time configurations are defined in the prior art. As shown in FIG. 5, when the RS transmission time configuration/ CSI- ⁇ is 36, the RS period is 40 transmission time intervals TTI, and the RS offset is 1. This means that the RS is transmitted on the TTI at times 1, 41, 81, 121.
  • the base station configures the RS transmission time configuration/ CSI - RS for the UE.
  • the pattern of the RS configured by the base station for the UE is (9, 5) and (9, 6) two REs.
  • the RS pattern indicates the time and frequency of the RS transmission (referred to as the time-frequency grid point).
  • the signal is transmitted in units of TTI in time.
  • the length of one TTI is lms, including 14 symbols, and one physical resource block (Phys ica l Resource Block, PRB) is 12 subcarriers within one TTI, each of which Each subcarrier on a symbol is called a Resource Element (RE), so 1 PRB includes 12x14 REs, and each group of REs (including 1 or more REs) can pass (k, 1). To represent.
  • PRB Physical resource block
  • the pattern of the RS transmitted by the transmission point 1 and the transmission point 2 is as shown in FIG. 6 and FIG. 7, for the same physical resource.
  • the module PRB the transmission point 1 transmits the RS pattern as (9, 5) and (9, 6) two REs, and the transmission point 2 transmits the RS pattern as (3, 5) and (3, 6) two REs.
  • the pattern of the RS transmitted by the transmission point 1 and the transmission point 2 is as shown in Figs. 8 and 9, for the same PRB,
  • the transmission point 1 transmits the RS pattern as (4, 5) and (4, 6) two REs
  • the transmission point 2 transmits the RS pattern as (9, 5) and (9, 6) two REs.
  • the pattern of RS is (9, 5) and (9, 6)
  • the RS measured on the RE is transmitted from the transmission point 1, and the TTI at the time of 0, 10, 20... belongs to the first
  • the CSI measures the reference resource set, so the UE can obtain the first CSI between the transmission point 1 and the UE, and feed back the first CSI according to the first CSI measurement reference resource set feedback mechanism; at time 5, 15, 25...
  • the TTI, RS pattern is (9, 5) and (9, 6)
  • the RS measured on the two REs is transmitted from the transmission point 2, and the time is 5, 15, 25...
  • the TTI belongs to the second CSI measurement reference resource set, so the UE can obtain the second CS I between the transmission point 2 and the UE, and feed back the second CSI according to the second CS I measurement reference resource set feedback mechanism.
  • the specific first CS I measurement reference resource set may be indicated by a bitmap, where each bit of the bitmap corresponds to each TTI or TTI set, and if the value of the bit is "1", the TTI or TTI set corresponding to the bit is indicated. It belongs to the first CSI measurement reference resource set. If the value of the bit is "1", it indicates that the TTI or TTI set corresponding to the bit does not belong to the first CSI measurement reference resource set.
  • the TTI set can be all TTIs within one RS period.
  • the second CSI measurement reference resource set may also be indicated by a bitmap, and the specific method is similar to the first CSI measurement reference resource set, and details are not described herein again.
  • the bitmap has a length of 40 bits, corresponding to 40 consecutive ⁇
  • the first CSI measurement reference resource set can be represented by (10000 00000 10000 00000 10000 00000 10000.
  • the RS resource adopts the frequency dimension, similar to the method of the time dimension described above, it is only necessary to replace the ⁇ with PRB and replace it with frequency at all times.
  • the user equipment receives the information sent by the base station After the at least two channel state information CSIs measure each CSI measurement reference resource set in the reference resource set, receive an RS configuration corresponding to each of the CSI measurement reference resource sets, where the RS configuration includes at least one of the following information: : RS antenna interface number, RS pilot pattern, RS period, RS subframe offset.
  • the RS pattern indicates the time and frequency of the RS transmission (referred to as the time-frequency grid point).
  • the signal is transmitted in units of TTI in time.
  • the length of one TTI is lms, including 14 symbols, and one physical resource block (PRB) is 12 subcarriers within one TTI, each of which Each subcarrier on a symbol is called a Resource Element (RE), so 1 PRB includes 12x14 REs, and each group of REs (including 1 or more REs) can pass (k, 1). To represent.
  • PRB physical resource block
  • the user equipment may separately measure and refer to the CSI measurement reference resource set and the RS configuration corresponding to each CSI measurement reference resource set according to the at least two CS I measurement reference resource sets.
  • Each CS I measures a CSI between the transmission point combination corresponding to the set of reference resources and the user equipment, and acquires a feedback mechanism that satisfies a CSI requirement between the transmission point combination and the user equipment.
  • transmission point 1 there are two transmission points, transmission point 1 and transmission point 2.
  • the pattern of the RS transmitted by the transmission point 1 is as shown in Fig. 10.
  • the transmission point 1 transmits the RS pattern of (9, 5) and (9, 6) two REs.
  • the pattern of the RS transmitted by the transmission point 1 and the transmission point 2 is as shown in FIG. 11 and FIG. 12, and for the same PRB,
  • the transmission point 1 transmits the RS pattern as (11, 5) and (11, 6) two REs
  • the transmission point 2 transmits the RS pattern as (5, 5) and (5, 6) two REs.
  • (11, 5), (11, 6), (5, 5) and (5, 6) form a 4-port RS pattern.
  • the base station configures the first RS pattern as (9, 5) and (9, 6) two REs for the UE, and the base station configures the second RS pattern for the UE as (11, 5), (11, 6), (5, 5) And (5, 6) four REs.
  • the pattern of RS is (9, 5) and (9, 6)
  • the RS measured on the RE is transmitted from the transmission point 1, and the TTI at the time of 0, 10, 20... belongs to the first
  • the CSI measures the reference resource set, so the UE can obtain the first CS I between the transmission point 1 and the UE according to the first CSI measurement reference resource set and the first RS pattern, and feed back the reference resource set feedback mechanism according to the first CS I measurement.
  • the TTIs of time 5, 15, 25... belong to the second CSI measurement reference resource set, so the UE can obtain the transmission point 1 and the transmission point 2 according to the second CS I measurement reference resource set and the second RS pattern.
  • the specific first CSI measurement reference resource set may be indicated by a bitmap, where each bit of the bitmap corresponds to each TTI or TTI set, and if the value of the bit is "1", then the TTI or TTI set corresponding to the bit belongs to The first CSI measurement reference resource set, if the value of the bit is "1", indicates that the TTI or TTI set corresponding to the bit does not belong to the first CSI measurement reference resource set.
  • the TTI set can be all TTIs within one RS period.
  • the second CSI measurement reference resource set may also be indicated by a bitmap, and the specific method is similar to the first CSI measurement reference resource set, and details are not described herein again.
  • the bitmap has a length of 40 bits, corresponding to 40 consecutive ⁇
  • the first CSI measurement reference resource set can be represented by (1000G 00000 10000 00000 10000 00000 10000.
  • the RS resource adopts the frequency dimension, similar to the method of the time dimension described above, it is only necessary to replace the ⁇ with PRB and replace it with frequency at all times.
  • FIG. 2 shows a user equipment according to an embodiment of the present invention.
  • the user equipment includes: a receiving unit 21, a measurement acquiring unit 22, and a feedback unit 23.
  • the receiving unit 21 is configured to receive, by the base station, at least two channel state information CS I measurement reference resource sets, where the reference signal RS resources included in the different CSI measurement reference resource sets are different from each other, and the different CSI measurement reference resource set includes The RSs have different RS characteristics, and the RSs included in the same CSI measurement reference resource set have the same RS characteristics.
  • a measurement acquisition unit 22 configured to measure each of the CSI measurement reference sets according to the at least two CSI measurement reference resource sets received by the receiving unit 21, and measure each of the
  • CS I measures CS I corresponding to the reference resource set, and obtains each CS I measurement reference resource set with The corresponding feedback mechanism.
  • the feedback mechanism corresponding to different CS I measurement reference sets in the two CS I measurement reference resource sets is the same or different.
  • the feedback mechanism may include a feedback mode, a feedback period, a frequency domain granularity, feedback trigger signaling, and the like.
  • the feedback unit 23 is configured to feed back the measurement result to the base station by using the feedback mechanism acquired by the measurement acquiring unit 22.
  • the measurement result is CSI between any one of the at least two transmission points corresponding to each of the CS I measurement reference resource sets and the user equipment, and the transmission point is A device that provides services to the user device.
  • the receiving unit 21 may be further configured to: when the feedback unit 23 needs the feedback mechanism obtained by the measurement acquiring unit 22, the measurement result fed back to the base station is between the transmission point combination and the user equipment. And receiving, by the base station, an RS configuration respectively corresponding to each CSI measurement reference resource set in the at least two channel state information CSI measurement reference resource sets, where the RS configuration includes at least one of the following information: Number of antenna interfaces, RS pilot pattern, RS period, RS subframe offset;
  • the RS pattern indicates the time and frequency of the RS transmission (referred to as the time-frequency grid point).
  • the signal is transmitted in units of TTI in time.
  • the length of one TTI is lms, including 14 symbols, and one physical resource block (PRB) is 12 subcarriers within one TTI, each of which Each subcarrier on a symbol is called a Resource Element (RE), so 1 PRB includes 12x14 REs, and each group of REs (including 1 or more REs) can pass (k, 1). To represent.
  • the measurement obtaining unit 22 is further configured to: separately measure, according to the each CSI measurement reference resource set received by the receiving unit 21 and the RS configuration corresponding to each CSI measurement reference resource set, A CSI measures a CSI between the transmission point combination corresponding to the set of reference resources and the user equipment, and acquires a feedback mechanism that satisfies a CSI requirement between the transmission point combination and the user equipment.
  • the specific example is similar to the example illustrated in the method for acquiring channel state information shown in FIG. 1 , and details are not described herein again.
  • FIG. 3 is a diagram of another method for obtaining channel state information according to an embodiment of the present invention, where the method includes:
  • the base station sends at least two channel state information CS I to the user equipment to measure the reference resource set.
  • the user equipment may be configured to measure CS I corresponding to each CS I measurement reference resource set according to each CSI measurement reference set in the at least two CSI measurement reference resource sets, and obtain and Each of the CS I measures a feedback mechanism corresponding to the reference resource set.
  • the reference signal RS resources included in the different CSI measurement reference resource sets are different from each other, and the RSs included in the different CSI measurement reference resource sets have different RS features, and the RSs included in the same CSI measurement reference resource set have the same RS.
  • the RS resource is a resource that includes a time dimension of the RS (such as a subframe) or a resource that is a frequency dimension (such as a subband); the RS feature includes a transmission point that sends the RS, and a configuration of the RS.
  • the configuration of the RS includes an RS antenna interface number, an RS pilot pattern, an RS period, and an RS subframe offset.
  • the base station receives a measurement result that is sent by the user equipment to the base station by using the feedback mechanism, where the measurement result is any one of at least two transmission points respectively corresponding to each of the CS I measurement reference resource sets.
  • a transmission point or transmission point combines CSI with the UE.
  • the measurement result may be CSI between any one of the at least two transmission points corresponding to each of the CS I measurement reference resource sets and the user equipment, where the transmission point For the device that provides the service to the user equipment, specifically, the transmission point may be a device such as an antenna.
  • the specific example of the method for acquiring the channel state information shown in FIG. 3 is similar to the example illustrated in the method for obtaining the channel state information shown in FIG. 1, and details are not described herein again.
  • FIG. 4 shows a base station according to an embodiment of the present invention, where the base station includes: a sending unit 41, Receiving unit 42.
  • the sending unit 41 is configured to send, to the user equipment, at least two channel state information CSI measurement reference resource sets, so that the user equipment determines, according to each of the at least two CS I measurement reference resource sets, a reference set, respectively Measuring CS I corresponding to each of the CSI measurement reference resource sets, and acquiring a feedback mechanism corresponding to each of the CS I measurement reference resource sets respectively.
  • the reference signal RS resources included in the different CSI measurement reference resource sets are different from each other, and the RSs included in the different CSI measurement reference resource sets have different RS features, and the RSs included in the same CSI measurement reference resource set have the same RS.
  • the RS resource is a resource that includes a time dimension of the RS (such as a subframe) or a resource that is a frequency dimension (such as a subband); the RS feature includes a transmission point that sends the RS, and a configuration of the RS.
  • the configuration of the RS includes an RS antenna interface number, an RS pilot pattern, an RS period, and an RS subframe offset.
  • the sending unit 41 is further configured to: when the measurement result fed back by the user equipment to the receiving unit 42 by using the feedback mechanism is a CSI between a transmission point combination and the user equipment, to the user
  • the device sends an RS configuration corresponding to each of the CS I measurement reference resource sets in the at least two channel state information CS I measurement reference resource sets.
  • the receiving unit 42 is configured to receive a measurement result that is fed back by the user equipment, and the measurement result is at least two transmission points respectively corresponding to each of the CSI measurement reference resource sets.
  • a transmission point or transmission point combines CS I with the user equipment, and the transmission point is a device that provides a service to the user equipment.
  • the measurement result may be CSI between any one of the at least two transmission points corresponding to each of the CS I measurement reference resource sets and the user equipment, where the transmission point For the device that provides the service to the user equipment, specifically, the transmission point may be a device such as an antenna.
  • the specific example of the base station shown in FIG. 4 is similar to the example illustrated in the method for acquiring channel state information shown in FIG. 1, and details are not described herein again.
  • the method and device for acquiring the channel state information provided by the embodiment of the present invention are adjusted by the user equipment according to the different requirements of the CS I for the feedback mechanism between the different transmission points and the user equipment corresponding to the CS I measurement reference resource set sent by the base station.
  • the feedback mechanism solves the problem that the feedback mechanism is inflexible when the CS I of the wireless channel between the different transmission points and the user equipment is obtained in the prior art.
  • the user equipment and the base station provided by the embodiments of the present invention may implement the foregoing method embodiments.
  • the method and apparatus for acquiring channel state information provided by the embodiments of the present invention may be applied to the field of communication systems, but are not limited thereto.
  • the storage medium may be a magnetic disk, an optical disk, or a read-only storage memory.

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Abstract

本发明实施例公开了一种信道状态信息的获取方法及装置，解决了在实现获取不同传输点与用户设备之间的无线信道的CSI时，反馈机制不灵活的问题。所述方法包括：首先用户设备接收基站发送的至少两个信道状态信息CSI测量参考资源集合；然后所述用户设备根据所述至少两个信道状态信息CSI测量参考资源集合中的每一个CSI测量参考集合，分别测量与所述每一个CSI测量参考资源集合对应的传输点或/和传输点组合与所述用户设备之间的CSI，并获取与满足所述传输点或/和传输点组合与所述用户设备之间的CSI需求的反馈机制；最后所述用户设备通过所述相同或不同的反馈机制向所述基站反馈测量结果。本发明适用于通信系统领域。

Description

信道状态信息的获取方法及装置 本申请要求于 2011 年 12 月 14 日提交中国专利局、 申请号为 201110418223.6、发明名称为"信道状态信息的获取方法及装置"的中国专利 申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信系统领域， 特别涉及一种信道状态信息的获取方法及 装置。 背景技术
在传统无线通信系统中， 每个用户设备 ( User Equipment, UE )通常 仅接收从一个小区发送的数据和信令信息， 其中每个小区包含一个或多个 具有收发装置的传输点， 一个具有收发装置的传输点可以对应一根或多根 天线。 技术人员可以容易理解， 下文中的 "小区" 或 "小区对应的传输点" 表示的是相同含义。
通常， 为了使基站能够进行合理的调度， 基站需要获知传输点与 UE之 间的无线信道的信道状态信息 （Channel State Information, CSI ), 该信 息往往由 UE对传输点发送的参考信号 （Reference Signal, RS )进行测量、 并将测量结果反馈给基站而获得 RS,例如 LTE-Advanced(LTE的进一步演进） 系 统 中 的 CSI-RS 。 在 CoMP ( Coordinated Multiple Point transmission/reception, 协作多点发送 /接收) 系统中 , 为了使多个传输 点之间能进行合理的协作， 负责调度的基站需要获知多个传输点与 UE之间 的无线信道的 CSI。
现有技术中， 基站将一个 RS图案的信息和一组 RS可用资源的信息发送 给 UE; 在第 1资源， 传输点 1按照所述 RS图案发送 RS, 传输点 2不按照所述 RS 图案发送 RS, 所述第 1资源是所述一组 RS可用资源的非空子集； 在第 2资源， 所述传输点 2按照所述 RS图案发送 RS， 所述传输点 1不按照所述 RS图案发送 RS, 所述第 2资源是所述一组 RS可用资源的非空子集； 所述 UE在所述 2个资 源上按照所述 RS图案测量 RS , 并反馈测量结果； 基站接收 UE反馈的测量结 果， 获得所述传输点 1和所述传输点 2与 UE之间的 CS I。
现有技术虽然可以实现获取不同传输点与 UE之间的无线信道的 CS I , 但 是由于 2个资源上的 CSI共用同一个反馈机制向基站反馈， 造成了用户设备 向基站反馈 CSI时， 反馈机制不灵活的问题。
发明内容
本发明的实施例提供一种信道状态信息的获取方法及装置， 解决了实 现获取不同传输点与用户设备之间的无线信道的 CSI 时， 反馈机制不灵活 的问题。
本发明实施例采用的技术方案为：
一种信道状态信息的获取方法， 包括：
用户设备接收基站发送的至少两个信道状态信息 CS I测量参考资源集 合， 其中， 不同 CSI测量参考资源集合包含的参考信号 RS资源互不相同， 所 述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测量 参考资源集合包含的 RS具有相同的 RS特征；
所述用户设备根据所述至少两个 CSI测量参考资源集合中的每一个 CSI 测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合对应的 CSI , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制；
所述用户设备通过所述反馈机制向所述基站反馈测量结果， 所述测量 结果为与所述每一个 CS I测量参考资源集合分别对应的至少两个传输点中 任一个传输点或传输点组合与所述用户设备之间的 CS I , 所述传输点为向所 述用户设备提供服务的设备。
一种用户设备， 包括：
接收单元， 用于接收基站发送的至少两个信道状态信息 CS I测量参考资 源集合， 其中，不同 CSI测量参考资源集合包含的参考信号 RS资源互不相同， 所述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测 量参考资源集合包含的 RS具有相同的 RS特征；
测量获取单元， 用于根据所述接收单元接收到的所述至少两个 CSI测量 参考资源集合中的每一个 CSI测量参考集合， 分别测量与所述每一个 CSI测 量参考资源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分 别对应的反馈机制；
反馈单元， 用于通过所述测量获取单元获取的所述反馈机制向所述基 站反馈测量结果， 所述测量结果为与所述每一个 CS I测量参考资源集合分 别对应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之 间的 CS I , 所述传输点为向所述用户设备提供服务的设备。
另一种信道状态信息的获取方法， 包括：
基站向用户设备发送至少两个信道状态信息 CS I测量参考资源集合， 以 使得所述用户设备根据所述至少两个 CSI测量参考资源集合中的每一个 CSI 测量参考集合， 分别测量与所述每一个 CS I测量参考资源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制；
所述基站接收所述用户设备通过所述反馈机制向所述基站反馈的测量 结果， 所述测量结果为与所述每一个 CSI测量参考资源集合分别对应的至少 两个传输点中任一个传输点或传输点组合与所述用户设备之间的 CSI , 所述 传输点为向所述用户设备提供服务的设备。
一种基站， 包括：
发送单元， 用于向用户设备发送至少两个信道状态信息 CS I测量参考资 源集合， 以使得所述用户设备根据所述至少两个 CS I测量参考资源集合中的 每一个 CSI测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合对 应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制； 接收单元， 用于接收所述用户设备通过所述用户设备获取的反馈机制 向所述接收单元反馈的测量结果， 所述测量结果为与所述每一个 CSI测量参 考资源集合分别对应的至少两个传输点中任一个传输点或传输点组合与所 述用户设备之间的 CSI , 所述传输点为向所述用户设备提供服务的设备。 本发明实施例提供的信道状态信息的获取方法及装置， 首先用户设备 接收基站发送的至少两个信道状态信息 CS I测量参考资源集合； 然后所述用 户设备根据所述至少两个信道状态信息 CSI测量参考资源集合中的每一个 CSI测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合对应的传 输点或 /和传输点组合与所述用户设备之间的 CSI , 并获取与满足所述传输 点或 /和传输点组合与所述用户设备之间的 CSI需求的相同或不同的反馈机 制； 最后所述用户设备通过所述相同或不同的反馈机制向所述基站反馈测 量结果。 现有技术虽然可以测量不同传输点与用户设备之间的 CS I，但是用 户设备在向基站反馈测量结果时， 反馈机制不灵活。 本发明实施例提供的 方案通过用户设备根据与基站发送的 CSI测量参考资源集合对应的不同传 输点与用户设备之间的 CSI对于反馈机制的不同需求， 调整反馈机制， 解决 了现有技术用户设备在向基站反馈测量结果时， 反馈机制不灵活的问题。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例或现 有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中 的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不 付出创造性劳动的前提下， 还可以根据这些附图获得其它的附图。
图 1为本发明实施例提供的一种信道状态信息的获取方法流程图； 图 2为本发明实施例提供的一种用户设备结构示意图；
图 3为本发明实施例提供的另一种信道状态信息的获取方法流程图； 图 4为本发明实施例提供的一种基站结构示意图；
图 5为本发明实施例提供的参考信号的发送时刻配置图；
图 6为本发明实施例提供的传输点 1在第 1 RS资源上发送 RS的图案； 图 7为本发明实施例提供的传输点 2在第 1RS资源上发送 RS的图案； 图 8为本发明实施例提供的传输点 1在第 2RS资源上发送 RS的图案； 图 9为本发明实施例提供的传输点 2在第 2RS资源上发送 RS的图案； 图 10为本发明实施例提供的传输点 1在第 1RS资源上发送 RS的图案； 图 11为本发明实施例提供的传输点 1在第 2RS资源上发送 RS的图案； 图 12为本发明实施例提供的传输点 2在第 2RS资源上发送 RS的图案。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其它实施例， 都属于本发明保护的 范围。
为使本发明技术方案的优点更加清楚， 下面结合附图和实施例对本发 明作伴细说明。
图 1示出了本发明实施例提供的一种信道状态信息的获取方法， 所述方 法包括：
101、 用户设备接收基站发送的至少两个信道状态信息 CSI测量参考资 源集合。
其中， 不同 CS I测量参考资源集合包含的参考信号 RS资源互不相同， 所 述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测量 参考资源集合包含的 RS具有相同的 RS特征， 所述 RS资源为含有 RS的时间维 度的资源 （如子帧）或者为频率维度的资源 （如子带）； 所述 RS特征包括发 送所述 RS的传输点、 所述 RS的配置， 所述 RS的配置包括 RS天线接口数、 RS 导频图案、 RS周期和 RS子帧偏移。
102、 所述用户设备根据所述至少两个 CS I测量参考资源集合中的每一 个 CSI测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合对应的 CSI , 并获取与每一个 CSI测量参考资源集合分别对应的反馈机制。
其中， 所述两个 CS I测量参考资源集合中的不同 CS I测量参考集合对应 的所述反馈机制相同或不同。 所述反馈机制可以包括反馈模式、 反馈周期、 频域粒度、 反馈触发信令等。
103、 所述用户设备通过所述反馈机制向所述基站反馈测量结果。
其中， 所述测量结果可以为与所述每一个 CS I测量参考资源集合分别对 应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之间的
CSI , 所述传输点为向所述用户设备提供服务的设备， 具体地， 传输点可以 为天线等设备。
例如， 有两个传输点， 分别为传输点 1和传输点 2。 在现有技术中定义了 多个 RS发送时刻配置， 如图 5所示， 当 RS发送时刻配置 /CSI― ^为36时， RS的周 期为 40个传输时间间隔 TTI , RS偏移为 1 , 这表示 RS在时刻为 1、 41、 81、 121 ... ...的 TTI上被发送。在该例中，基站为 UE配置的 RS发送时刻配置 /CSI— RS为
0 , 表示 RS的周期为 5个 TTI , RS偏移为 0 , 即 RS在时刻为 0、 5、 10、 15... ... 的 TTI上被发送； 基站为 UE配置的 RS的图案为（9， 5)和（9， 6)两个 RE。 其中， RS图案表示 RS发送的时刻和频点 （简称为时频格点） 。 信号的发送在时间 上以 TTI为单位， 1个 TTI的长度为 lms , 包括 14个符号， 1个物理资源块 ( Phys ica l Resource Block , PRB ) 为 1个 TTI内的 12个子载波， 其中每个 符号上的每个子载波被称为 1个资源单元（ Resource E lement , RE ) , 因此 1个 PRB包括 12x14个 RE ,每组 RE (包括 1个或多个 RE )可以通过（k， 1)来表示。
在编号为 0、 10、 20... ...的 TTI (第 1RS资源）上， 传输点 1和传输点 2所 发送的 RS的图案如图 6、 图 7所示， 对于同一个物理资源模块 PRB, 传输点 1 发送 RS的图案为 (9， 5)和（9, 6)两个 RE , 传输点 2发送 RS的图案为（3， 5)和 (3， 6)两个 RE。
在时刻为 5、 15、 25... ...的 TTI (第 2RS资源）上， 传输点 1和传输点 2所 发送的 RS的图案如图 8和图 9所示， 对于同一个 PRB, 传输点 1发送 RS的图案 为（4， 5)和（4， 6)两个 RE, 传输点 2发送 RS的图案为（9， 5)和（9， 6)两个 RE。
由于 UE在时刻为 0、 10、 20... ...的 TTI , RS的图案为（9， 5)和（9， 6)两个 RE上测量的 RS是从传输点 1发送的， 而时刻为 0、 10、 20... ...的 TTI属于第一
CSI测量参考资源集合， 因此 UE能够获得传输点 1与 UE之间的第一 CSI , 并根 据第一 CSI测量参考资源集合反馈机制反馈第一 CSI ;在时刻为 5、 15、 25... ... 的 TTI , RS的图案为（9， 5)和（9, 6)两个 RE上测量的 RS是从传输点 2发送的， 而时刻为 5、 15、 25... ...的 TTI属于第二 CSI测量参考资源集合， 因此 UE能够 获得传输点 2与 UE之间的第二 CS I , 并根据第二 CS I测量参考资源集合反馈机 制反馈第二 CSI。
具体的第一 CS I测量参考资源集合可用位图来指示， 位图的每一个比特 对应于每一个 TTI或 TTI集合， 如果比特的值为 "1 " ，那么表示该比特对应 的 TTI或 TTI集合属于第一 CSI测量参考资源集合， 如果比特的值为 "1" ，那 么表示该比特对应的 TTI或 TTI集合不属于第一 CSI测量参考资源集合。 其中 TTI集合可以为一个 RS的周期内的所有 TTI。 进一步的， 第二 CSI测量参考资 源集合也可用位图来指示， 具体方法与第一 CSI测量参考资源集合相似， 此 处不再赘述。
例如，位图的长度为 40个比特，分别对应 40个连续的 ΤΤΙ ,对于第一 CSI 测量参考资源集合可以用 （ 10000 00000 10000 00000 10000 00000 10000 表示。
当 RS资源采用频率维度时， 与上述时间维度的方法相似， 只需将所述 ΤΤΙ用 PRB来代替、 时刻用频率代替即可。
可选地， 当需要所述用户设备通过所述反馈机制向所述基站反馈的测 量结果为传输点组合与所述用户设备之间的 CSI时， 所述用户设备接收所述 基站发送的与所述至少两个信道状态信息 CSI测量参考资源集合中每一个 CSI测量参考资源集合后， 再接收与所述每一个 CSI测量参考资源集合分别 对应的 RS配置， 所述 RS配置包括至少以下信息之一： RS天线接口数、 RS导 频图案、 RS周期、 RS子帧偏移。 其中， RS图案表示 RS发送的时刻和频点 （简称为时频格点）。 信号的发 送在时间上以 TTI为单位， 1个 TTI的长度为 lms , 包括 14个符号， 1个物理资 源块（Phys ica l Resource Block , PRB ) 为 1个 TTI内的 12个子载波， 其中 每个符号上的每个子载波被称为 1个资源单元（Resource E lement , RE ), 因此 1个 PRB包括 12x14个 RE, 每组 RE (包括 1个或多个 RE )可以通过（k， 1)来 表示。
此时， 所述用户设备可以根据所述至少两个 CS I测量参考资源集合中的 每一个 CSI测量参考资源集合和与所述每一个 CSI测量参考资源集合对应的 RS配置， 分别测量与所述每一个 CS I测量参考资源集合对应的所述传输点组 合与所述用户设备之间的 CSI , 并获取与满足所述传输点组合与所述用户设 备之间的 CSI需求的反馈机制。
例如， 有两个传输点传输点 1和传输点 2。 在时刻为 0、 10、 20... ...的 TTI
(第 1RS资源）上，传输点 1所发送的 RS的图案如图 10所示，对于同一个 PRB, 传输点 1发送 RS的图案为 (9， 5)和（9， 6)两个 RE。
在编号为 5、 15、 25... ...的 TTI (第 2RS资源）上， 传输点 1和传输点 2所 发送的 RS的图案如图 11和图 12所示， 对于同一个 PRB, 传输点 1发送 RS的图 案为 (11， 5)和（11， 6)两个 RE , 传输点 2发送 RS的图案为 (5， 5)和（5， 6)两个 RE。 （11 , 5) , (11, 6) , (5， 5)和（5， 6)构成一个 4端口 RS图案。
基站为 UE配置第一 RS图案为（9， 5)和（9， 6)两个 RE， 基站为 UE配置第二 RS图案为（11， 5) , (11, 6) , (5， 5)和（5， 6)四个 RE。
由于 UE在时刻为 0、 10、 20... ...的 TTI , RS的图案为（9， 5)和（9， 6)两个
RE上测量的 RS是从传输点 1发送的， 而时刻为 0、 10、 20... ...的 TTI属于第一
CSI测量参考资源集合， 因此 UE能够根据第一 CSI测量参考资源集合和第一 RS图案获得传输点 1与 UE之间的第一 CS I , 并根据第一 CS I测量参考资源集合 反馈机制反馈第一 CSI ; 在时刻为 5、 15、 25……的 TTI , RS的图案为（11， 5) , (11， 6) , (5, 5)和（5， 6)四个 RE上测量的 RS是传输点 1与传输点 2联合发送的， 而时刻为 5、 15、 25... ...的 TTI属于第二 CSI测量参考资源集合， 因此 UE能够 根据第二 CS I测量参考资源集合和第二 RS图案获得传输点 1和传输点 2组合 后与 UE之间的第二 CS I , 并根据第二 CS I测量参考资源集合反馈机制反馈第 二 CSI。
具体的第一 CSI测量参考资源集合可用位图来指示， 位图的每一个比特 对应于每一个 TTI或 TTI集合， 如果比特的值为 "1 " ，那么表示该比特对应 的 TTI或 TTI集合属于第一 CSI测量参考资源集合， 如果比特的值为 "1" ，那 么表示该比特对应的 TTI或 TTI集合不属于第一 CSI测量参考资源集合。 其中 TTI集合可以为一个 RS的周期内的所有 TTI。 进一步的， 第二 CSI测量参考资 源集合也可用位图来指示， 具体方法与第一 CSI测量参考资源集合相似， 此 处不再赘述。
例如，位图的长度为 40个比特，分别对应 40个连续的 ΤΤΙ ,对于第一 CSI 测量参考资源集合可以用 （ 1000G 00000 10000 00000 10000 00000 10000 表示。
当 RS资源采用频率维度时， 与上述时间维度的方法相似， 只需将所述 ΤΤΙ用 PRB来代替、 时刻用频率代替即可。
图 2示出了本发明实施例提供的一种用户设备， 所述用户设备包括： 接 收单元 21、 测量获取单元 22、 反馈单元 23。
接收单元 21 , 用于接收基站发送的至少两个信道状态信息 CS I测量参考 资源集合， 其中， 不同 CSI测量参考资源集合包含的参考信号 RS资源互不相 同，所述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI 测量参考资源集合包含的 RS具有相同的 RS特征。
测量获取单元 22 , 用于根据所述接收单元 21接收到的所述至少两个 CS I 测量参考资源集合中的每一个 CSI测量参考集合， 分别测量与所述每一个
CS I测量参考资源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集 合分别对应的反馈机制。
其中， 所述两个 CS I测量参考资源集合中的不同 CS I测量参考集合对应 的所述反馈机制相同或不同。 所述反馈机制可以包括反馈模式、 反馈周期、 频域粒度、 反馈触发信令等。
反馈单元 23 , 用于通过所述测量获取单元 22获取的所述反馈机制向所 述基站反馈测量结果。
其中， 所述测量结果为与所述每一个 CS I测量参考资源集合分别对应的 至少两个传输点中任一个传输点或传输点组合与所述用户设备之间的 CSI , 所述传输点为向所述用户设备提供服务的设备。
所述接收单元 21还可以用于， 当需要所述反馈单元 23通过所述测量获 取单元 22获取的所述反馈机制向所述基站反馈的测量结果为传输点组合与 所述用户设备之间的 CS I时， 接收所述基站发送的与所述至少两个信道状态 信息 CSI测量参考资源集合中每一个 CSI测量参考资源集合分别对应的 RS配 置， 所述 RS配置包括至少以下信息之一： RS天线接口数、 RS导频图案、 RS 周期、 RS子帧偏移；
其中， RS图案表示 RS发送的时刻和频点 （简称为时频格点）。 信号的发 送在时间上以 TTI为单位， 1个 TTI的长度为 lms , 包括 14个符号， 1个物理资 源块（Phys ica l Resource Block , PRB ) 为 1个 TTI内的 12个子载波， 其中 每个符号上的每个子载波被称为 1个资源单元（Resource E lement , RE ), 因此 1个 PRB包括 12x14个 RE, 每组 RE (包括 1个或多个 RE )可以通过（k， 1)来 表示。
所述测量获取单元 22还可以用于， 根据所述接收单元 21接收的所述每 一个 CSI测量参考资源集合和与所述每一个 CSI测量参考资源集合对应的 RS 配置， 分别测量与所述每一个 CS I测量参考资源集合对应的所述传输点组合 与所述用户设备之间的 CSI , 并获取与满足所述传输点组合与所述用户设备 之间的 CSI需求的反馈机制。 其中， 具体的举例与图 1示出的信道状态信息的获取方法中所例举的例 子相似， 在此不再赘述。
图 3示出了本发明实施例提供的另一种信道状态信息的获取方法， 所述 方法包括：
301、 基站向用户设备发送至少两个信道状态信息 CS I测量参考资源集 合。
进一步地， 可以使得所述用户设备根据所述至少两个 CSI测量参考资源 集合中的每一个 CSI测量参考集合， 分别测量与所述每一个 CS I测量参考资 源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合对应的反馈 机制。
其中， 不同 CS I测量参考资源集合包含的参考信号 RS资源互不相同， 所 述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测量 参考资源集合包含的 RS具有相同的 RS特征， 所述 RS资源为含有 RS的时间维 度的资源 （如子帧）或者为频率维度的资源 （如子带）； 所述 RS特征包括发 送所述 RS的传输点、 所述 RS的配置， 所述 RS的配置包括 RS天线接口数、 RS 导频图案、 RS周期和 RS子帧偏移。
302、 所述基站接收所述用户设备通过所述反馈机制向所述基站反馈的 测量结果， 所述测量结果为与所述每一个 CS I测量参考资源集合分别对应的 至少两个传输点中任一个传输点或传输点组合与所述 UE之间的 CSI。
其中， 所述测量结果可以为与所述每一个 CS I测量参考资源集合分别对 应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之间的 CSI , 所述传输点为向所述用户设备提供服务的设备， 具体地， 传输点可以 为天线等设备。
图 3示出的另一种信道状态信息的获取方法的具体举例与图 1示出的一 种信道状态信息的获取方法中例举的例子相似， 在此不再赘述。
图 4示出了本发明实施例提供的一种基站，所述基站包括：发送单元 41、 接收单元 42。
发送单元 41 , 用于向用户设备发送至少两个信道状态信息 CSI测量参考 资源集合， 以使得所述用户设备根据所述至少两个 CS I测量参考资源集合中 的每一个 CSI测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合 对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机 制。
其中， 不同 CS I测量参考资源集合包含的参考信号 RS资源互不相同， 所 述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测量 参考资源集合包含的 RS具有相同的 RS特征， 所述 RS资源为含有 RS的时间维 度的资源 （如子帧）或者为频率维度的资源 （如子带）； 所述 RS特征包括发 送所述 RS的传输点、 所述 RS的配置， 所述 RS的配置包括 RS天线接口数、 RS 导频图案、 RS周期和 RS子帧偏移。
所述发送单元 41还可以用于， 当需要所述用户设备通过所述反馈机制 向所述接收单元 42反馈的测量结果为传输点组合与所述用户设备之间的 CSI时， 向所述用户设备发送与所述至少两个信道状态信息 CS I测量参考资 源集合中每一个 CS I测量参考资源集合分别对应的 RS配置。
接收单元 42 , 用于接收所述用户设备通过所述用户设备获取的反馈机 制反馈的测量结果， 所述测量结果为与所述每一个 CSI测量参考资源集合分 别对应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之 间的 CS I , 所述传输点为向所述用户设备提供服务的设备。
其中， 所述测量结果可以为与所述每一个 CS I测量参考资源集合分别对 应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之间的 CSI , 所述传输点为向所述用户设备提供服务的设备， 具体地， 传输点可以 为天线等设备。
图 4示出的基站的具体举例与图 1示出的一种信道状态信息的获取方法 中例举的例子相似， 在此不再赘述。 本发明实施例提供的信道状态信息的获取方法及装置， 通过用户设备 根据与基站发送的 CS I测量参考资源集合对应的不同传输点与用户设备之 间的 CS I对于反馈机制的不同需求， 调整反馈机制， 解决了现有技术在实现 获取不同传输点与用户设备之间的无线信道的 CS I时， 反馈机制不灵活的问 题。
本发明实施例提供的用户设备和基站可以实现上述提供的方法实施 例， 具体功能实现请参见方法实施例中的说明， 在此不再赘述。 本发明实 施例提供的信道状态信息的获取方法及装置可以适用于通信系统领域， 但 不仅限于此。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流 程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储 于一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的 实施例的流程。 其中， 所述的存储介质可为磁碟、 光盘、 只读存储记忆体
RAM )等。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局 限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可 轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发 明的保护范围应该以权利要求的保护范围为准。

Claims

权利要求
1、 一种信道状态信息的获取方法， 其特征在于， 包括：
用户设备接收基站发送的至少两个信道状态信息 CS I测量参考资源集 合， 其中， 不同 CSI测量参考资源集合包含的参考信号 RS资源互不相同， 所 述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测量 参考资源集合包含的 RS具有相同的 RS特征；
所述用户设备根据所述至少两个 CSI测量参考资源集合中的每一个 CSI 测量参考集合， 分别测量与所述每一个 CS I测量参考资源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制；
所述用户设备通过所述反馈机制向所述基站反馈测量结果， 所述测量 结果为与所述每一个 CS I测量参考资源集合分别对应的至少两个传输点中 任一个传输点或传输点组合与所述用户设备之间的 CS I , 所述传输点为向所 述用户设备提供服务的设备。
2、 根据权利要求 1所述的方法， 其特征在于， 所述 RS资源为时间维度 的资源或者为频率维度的资源；
所述 RS具有相同的特征包括： 所述 RS由相同的传输点发送并且所述 RS 具有相同的配置， 其中， 所述 RS具有相同的配置包括： 所述 RS具有相同的 RS天线接口数、 RS导频图案、 RS周期和 RS子帧偏移。
3、 根据权利要求 1所述的方法， 其特征在于， 所述用户设备接收基站 发送的至少两个信道状态信息 CSI测量参考资源集合之后还包括：
当需要所述用户设备通过所述反馈机制向所述基站反馈的测量结果为 传输点组合与所述用户设备之间的 CS I时， 所述用户设备接收所述基站发送 的与所述至少两个信道状态信息 CSI测量参考资源集合中每一个 CSI测量参 考资源集合分别对应的 RS配置， 所述 RS配置包括至少以下信息之一： RS天 线接口数、 RS导频图案、 RS周期、 RS子帧偏移； 所述用户设备根据所述至少两个 CSI测量参考资源集合中的每一个 CSI 测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合对应的 CSI , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制包括：
所述用户设备根据所述每一个 CS I测量参考资源集合和与所述每一个 CSI测量参考资源集合对应的 RS配置， 分别测量与所述每一个 CSI测量参考 资源集合对应的所述传输点组合与所述用户设备之间的 CSI , 并获取与满 足所述传输点组合与所述用户设备之间的 CSI需求的反馈机制。
4、 一种用户设备， 其特征在于， 包括：
接收单元， 用于接收基站发送的至少两个信道状态信息 CS I测量参考资 源集合， 其中，不同 CSI测量参考资源集合包含的参考信号 RS资源互不相同， 所述不同 CSI测量参考资源集合包含的 RS具有不同的 RS特征， 同一个 CSI测 量参考资源集合包含的 RS具有相同的 RS特征；
测量获取单元， 用于根据所述接收单元接收到的所述至少两个 CSI测量 参考资源集合中的每一个 CSI测量参考集合， 分别测量与所述每一个 CSI测 量参考资源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分 别对应的反馈机制；
反馈单元， 用于通过所述测量获取单元获取的所述反馈机制向所述基 站反馈测量结果， 所述测量结果为与所述每一个 CS I测量参考资源集合分 别对应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之 间的 CS I , 所述传输点为向所述用户设备提供服务的设备。
5、 根据权利要求 4所述的用户设备， 其特征在于， 所述接收单元接收 的 CSI测量参考资源集合包含的 RS资源为时间维度的资源或者为频率维度 的资源；
所述 RS具有相同的特征包括：所述 RS由相同的传输点发送并且所述 RS 具有相同的配置， 其中， 所述 RS具有相同的配置包括： 所述 RS具有相同的 RS天线接口数、 RS导频图案、 RS周期和 RS子帧偏移。
6、 根据权利要求 4所述的用户设备， 其特征在于，
所述接收单元还用于， 当需要所述反馈单元通过所述测量获取单元获 取的所述反馈机制向所述基站反馈的测量结果为传输点组合与所述用户设 备之间的 CS I时， 接收所述基站发送的与所述至少两个信道状态信息 CS I测 量参考资源集合中每一个 CSI测量参考资源集合分别对应的 RS配置， 所述 RS 配置包括至少以下信息之一： RS天线接口数、 RS导频图案、 RS周期、 RS子 帧偏移；
所述测量获取单元还用于， 根据所述接收单元接收的所述每一个 CSI测 量参考资源集合和与所述每一个 CS I测量参考资源集合对应的 RS配置， 分别 测量与所述每一个 CSI测量参考资源集合对应的所述传输点组合与所述用 户设备之间的 CSI , 并获取与满足所述传输点组合与所述用户设备之间的 CSI需求的反馈机制。
7、 一种信道状态信息的获取方法， 其特征在于， 包括：
基站向用户设备发送至少两个信道状态信息 CS I测量参考资源集合， 以 使得所述用户设备根据所述至少两个 CSI测量参考资源集合中的每一个 CSI 测量参考集合， 分别测量与所述每一个 CS I测量参考资源集合对应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制；
所述基站接收所述用户设备通过所述反馈机制向所述基站反馈的测量 结果， 所述测量结果为与所述每一个 CSI测量参考资源集合分别对应的至少 两个传输点中任一个传输点或传输点组合与所述用户设备之间的 CSI , 所述 传输点为向所述用户设备提供服务的设备。
8、 根据权利要求 7所述的方法， 其特征在于， 所述 RS资源为时间维度 的资源或者为频率维度的资源；
所述 RS具有相同的特征包括： 所述 RS由相同的传输点发送并且所述 RS 具有相同的配置， 其中， 所述 RS具有相同的配置包括： 所述 RS具有相同的 RS天线接口数、 RS导频图案、 RS周期和 RS子帧偏移。
9、 根据权利要求 7所述的方法， 其特征在于， 所述基站向用户设备发 送至少两个信道状态信息 CS I测量参考资源集合之后还包括：
当需要所述用户设备通过所述反馈机制向所述基站反馈的测量结果为 传输点组合与所述用户设备之间的 CS I时， 所述基站向所述用户设备发送与 所述至少两个信道状态信息 CSI测量参考资源集合中每一个 CS I测量参考资 源集合分别对应的 RS配置， 以使得所述用户设备根据所述每一个 CSI测量参 考资源集合和与所述每一个 CSI测量参考资源集合对应的 RS配置， 分别测量 与所述每一个 CSI测量参考资源集合对应的所述传输点组合与所述用户设 备之间的 CSI , 并获取与满足所述传输点组合与所述用户设备之间的 CSI需 求的反馈机制。
10、 一种基站， 其特征在于， 包括：
发送单元， 用于向用户设备发送至少两个信道状态信息 C S I测量参考资 源集合， 以使得所述用户设备根据所述至少两个 CSI测量参考资源集合中的 每一个 CSI测量参考集合， 分别测量与所述每一个 CSI测量参考资源集合对 应的 CS I , 并获取与所述每一个 CS I测量参考资源集合分别对应的反馈机制； 接收单元， 用于接收所述用户设备通过所述用户设备获取的反馈机制 反馈的测量结果， 所述测量结果为与所述每一个 CS I测量参考资源集合分别 对应的至少两个传输点中任一个传输点或传输点组合与所述用户设备之间 的 CSI , 所述传输点为向所述用户设备提供服务的设备。
11、 根据权利要求 10所述的基站， 其特征在于， 所述发送单元发送的 CSI测量参考资源集合包含的 RS资源为时间维度的资源或者为频率维度的 资源；
所述 RS具有相同的特征包括： 所述 RS由相同的传输点发送并且所述 RS 具有相同的配置， 其中， 所述 RS具有相同的配置包括： 所述 RS具有相同的 RS天线接口数、 RS导频图案、 RS周期和 RS子帧偏移。
12、 根据权利要求 10所述的基站， 其特征在于， 所述发送单元还用于， 当需要所述用户设备通过所述反馈机制向所述 接收单元反馈的测量结果为传输点组合与所述用户设备之间的 CSI时， 向所 述用户设备发送与所述至少两个信道状态信息 CS I测量参考资源集合中每 一个 CS I测量参考资源集合分别对应的 RS配置。
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