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WO2017000099A1 - 传输信道状态信息参考信号的方法和设备 - Google Patents

传输信道状态信息参考信号的方法和设备 Download PDF

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Publication number
WO2017000099A1
WO2017000099A1 PCT/CN2015/082595 CN2015082595W WO2017000099A1 WO 2017000099 A1 WO2017000099 A1 WO 2017000099A1 CN 2015082595 W CN2015082595 W CN 2015082595W WO 2017000099 A1 WO2017000099 A1 WO 2017000099A1
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WIPO (PCT)
Prior art keywords
csi
rss
group
target
time
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PCT/CN2015/082595
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English (en)
French (fr)
Inventor
徐凯
李晓翠
Original Assignee
华为技术有限公司
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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 CN201580077051.7A priority Critical patent/CN107431677B/zh
Priority to US15/561,583 priority patent/US20180070375A1/en
Priority to PCT/CN2015/082595 priority patent/WO2017000099A1/zh
Priority to EP15896630.9A priority patent/EP3267643B1/en
Priority to KR1020177030364A priority patent/KR102070961B1/ko
Publication of WO2017000099A1 publication Critical patent/WO2017000099A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • 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
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • Embodiments of the present invention relate to the field of communications, and, more particularly, to a method and apparatus for transmitting a channel state information reference signal CSI-RS.
  • each device needs to use frequency resources for information transmission, and the frequency resources are also called spectrum.
  • the spectrum used by the wireless communication system is divided into a licensed spectrum (Licensed Spectrum) and an unlicensed spectrum (Unlicensed Spectrum), wherein the licensed spectrum needs to be authorized before being used, and the unlicensed spectrum does not require authorization, and anyone can use it legally.
  • the carrier on the licensed spectrum is called the authorized carrier, and the carrier on the unlicensed spectrum is called the unlicensed carrier.
  • LBT is a carrier Sense Multiple Access (CSMA) technology.
  • the Channel State Information-Reference Signal is a downlink reference signal used by the user equipment UE to acquire channel state information.
  • the eNB sends a CSI-RS to the UE.
  • the CSI-RS may be periodically or non-periodically transmitted in the time domain.
  • the time at which the eNB preempts the channel is random, and the location (ie, the time) at which the CSI-RS is transmitted is determined, so that the CSI-RS cannot be sent to the UE in time.
  • the UE cannot obtain the channel state information in time; and when the CSI-RS is transmitted aperiodically, the eNB needs to frequently send signaling to the UE to indicate the sending position of each CSI-RS, and the signaling overhead is large.
  • the embodiment of the invention provides a method and a device for transmitting a channel state information reference signal (CSI-RS), which can transmit CSI-RS to a receiving device in a flexible manner without requiring a large signaling overhead.
  • CSI-RS channel state information reference signal
  • a method for transmitting a channel state information reference signal CSI-RS comprising:
  • the first device acquires an unlicensed carrier
  • a target CSI-RS from a pre-configured M group CSI-RS, each group of CSI-RSs in the M group of CSI-RSs being periodically transmitted in a time domain, and sending periods of different groups of CSI-RSs And/or offsets are different from each other, and M is an integer greater than one;
  • the first device sends the target CSI-RS to the second device at the initial transmission time of the target CSI-RS based on the unlicensed carrier.
  • the determining, by the first device, the target CSI-RS from the pre-configured M-group CSI-RS includes:
  • the sending periods of different groups of CSI-RSs in the M group of CSI-RSs are the same and the offsets are different.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the method further includes:
  • the first device sends an indication message to the second device to indicate a start sending time of the target CSI-RS.
  • a method for transmitting a channel state information reference signal CSI-RS comprising:
  • the second device Determining, by the second device, a receiving location for receiving a target CSI-RS sent by the first device, where the target CSI-RS is one CSI-RS of the pre-configured M group CSI-RS, each group of the M group CSI-RS
  • the CSI-RS is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is an integer greater than one;
  • the second device receives the target CSI-RS at the receiving location based on the unlicensed carrier acquired by the first device.
  • the target CSI-RS is a CSI-RS that is the closest to the first time in the M-group CSI-RS, and the first time is The moment at which the first device allows to start transmitting data on the unlicensed carrier.
  • the different groups of the CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the second device is configured to receive a receiving location of the target CSI-RS sent by the first device, including:
  • the second device determines the receiving location by blind detection or by receiving an indication message sent by the first device to indicate the receiving location.
  • a device for transmitting a channel state information reference signal CSI-RS comprising:
  • An obtaining module configured to acquire an unlicensed carrier
  • a determining module configured to determine, from a pre-configured M group CSI-RS, a target CSI-RS, where each group of CSI-RSs is periodically sent in a time domain, and different groups of CSI-RSs are sent.
  • the periods and/or offsets are different from each other, and M is an integer greater than one;
  • the sending module is configured to send the target CSI-RS to the second device at the initial sending time of the target CSI-RS determined by the determining module, based on the unlicensed carrier acquired by the acquiring module.
  • the determining module is specifically configured to determine, as the target, a CSI-RS that is the closest to the first time in the M-group CSI-RS.
  • the CSI-RS, the first moment is a moment when the first device allows to start transmitting data on the unlicensed carrier.
  • the sending periods of different groups of CSI-RSs in the M group of CSI-RSs are the same and the offsets are different.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the sending module is further configured to send, to the second device, an indication for indicating a start sending time of the target CSI-RS. Message.
  • a device for transmitting a channel state information reference signal CSI-RS comprising:
  • a determining module configured to determine a receiving location for receiving a target CSI-RS sent by the first device, where the target CSI-RS is one of the pre-configured M groups of CSI-RSs, where the M group of CSI-RSs Each group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is an integer greater than one;
  • a receiving module configured to receive the target CSI-RS at the receiving location determined by the determining module, based on the unlicensed carrier acquired by the first device.
  • the target CSI-RS is a CSI-RS that is the closest to the first time in the M-group CSI-RS, and the first time is The moment at which the first device allows to start transmitting data on the unlicensed carrier.
  • the sending periods of different groups of CSI-RSs in the M group of CSI-RSs are the same and the offsets are different.
  • the sending periods of different groups of CSI-RSs in the M group of CSI-RSs are different and the offsets are the same.
  • the different groups of the CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • the determining module is specifically configured to: by blind detection, or by receiving an indication sent by the first device to indicate the receiving location A message that determines the receiving location.
  • the transmitting device determines the target CSI-RS from the pre-configured M group CSI-RS, and each group of the CSI-RS in the M group CSI-RS
  • the periodic transmission is performed in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and the source device sends the target CSI-RS to the receiving device at the initial transmission time of the target CSI-RS.
  • FIG. 1 is a schematic flowchart of a method for transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a method for transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 3 illustrates another schematic diagram of a method of transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 5 shows a schematic block diagram of an apparatus for transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 6 shows another schematic block diagram of an apparatus for transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 7 shows still another schematic block diagram of an apparatus for transmitting a CSI-RS according to an embodiment of the present invention.
  • FIG. 8 shows still another schematic block diagram of an apparatus for transmitting a CSI-RS according to an embodiment of the present invention.
  • the device involved in the embodiment of the present invention may be a device in a Licensed-Assisted Access Using Long Term Evolution (LAA-LTE) system, or may be a device in other systems, for example, : Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Global System of Mobile communication (“GSM”) system, Code Division Multiple Access (“CDMA”) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, referred to as The "WCDMA” system, the General Packet Radio Service (“GPRS”), and the “Universal Mobile Telecommunication System” (UMTS) are not limited in this embodiment of the present invention.
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division
  • the device in the embodiment of the present invention may be a user equipment or a network side device, which is not limited in this embodiment of the present invention.
  • the user equipment may also be referred to as a terminal device, a mobile station (Mobile Station, referred to as “MS”), a mobile terminal (Mobile Terminal), etc., and the terminal device may be wireless.
  • a Radio Access Network communicates with one or more core networks, for example, the terminal device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal
  • the device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that can exchange language and/or data with the wireless access network.
  • the network side device may be a base station, and specifically may be an evolved base station (Evolutional Node B, referred to as “ENB” or “E-NodeB”) in a Long Term Evolution (LTE) system.
  • the network side device may also be an access point (“AP”) device.
  • AP access point
  • FIG. 1 illustrates a method 100 of transmitting a channel state information reference signal CSI-RS according to an embodiment of the present invention.
  • the method 100 includes:
  • the first device acquires an unlicensed carrier.
  • the first device determines, from a pre-configured M group CSI-RS, a target CSI-RS, where each group of CSI-RSs is periodically sent in a time domain, and different groups of CSI-RSs are sent.
  • the transmission period and/or the offset are different from each other, and M is an integer greater than one;
  • the first device sends the target CSI-RS to the second device at the initial sending time of the target CSI-RS based on the unlicensed carrier.
  • the first device preempts the channel by using the LBT principle to acquire an unlicensed carrier.
  • each group of CSI-RSs in the M group CSI-RS includes a group of CSI-RSs periodically transmitted in the time domain, specifically, each group of CSIs as shown in FIG.
  • the RS includes a CSI-RS sequence that is periodically transmitted in the time domain.
  • the transmission periods and/or offsets of different groups of CSI-RSs in the M-group CSI-RSs are different from each other.
  • the initial transmission times of the CSI-RSs in different groups of CSI-RSs are not completely the same, as shown in the figure.
  • the initial transmission timing of each CSI-RS in the first group CSI-RS shown in 2 is completely different from the initial transmission timing of each CSI-RS in the second group CSI-RS.
  • the target CSI-RS is one CSI-RS in one of the M-group CSI-RSs, and the initial transmission time of the target CS-RS is in the first device. After the time at which the data is allowed to start transmitting on the authorized carrier (referred to as the first time), or the initial transmission time of the target CS-RS is the same time as the first time, specifically, for example, the first device is obtained. Taking the unlicensed carrier, and the time at which the start of transmission of data on the unlicensed carrier is allowed to be the time tA shown in FIG. 2, the third CSI-RS in the second group of CSI-RSs shown in FIG. 2 may be used.
  • the third CSI-RS in the third group CSI-RS may be used as the target CSI-RS, or the fourth CSI-RS of the first group CSI-RS may be used as the target CSI-RS.
  • the target CSI-RS is not limited in this embodiment of the present invention.
  • the first device sends the initial CSI-RS based on the acquired unlicensed carrier.
  • the target CSI-RS is transmitted to the second device at a time (for example, time t1 shown in FIG. 2).
  • M groups of CSI-RSs are pre-configured, and each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods of different groups of CSI-RSs are And the offsets are different from each other.
  • the target CSI-RS is determined from the M group of CSI-RSs, and the target CSI is sent to the receiving device at the initial sending moment of the target CSI-RS. -RS.
  • a CSI-RS may be sent from a plurality of CSI-RS transmission locations to a receiving end device, which is comparable to the periodic transmission CSI-RS in the prior art. More flexible implementation of sending CSI-RS to the receiving device.
  • the transmission period of the CSI-RS refers to the transmission period of a group of CSI-RSs to which the target CSI-RS belongs, and specifically, the third CSI of the second group of CSI-RSs shown in FIG. 2 Taking the RS as the target CSI-RS as an example, after the first device sends the target CSI-RS to the second device at the initial transmission time t1 of the target CSI-RS, the following device continues the subsequent CSI based on the second group of CSI-RSs.
  • the initial transmission time of the RS transmits the CSI-RS to the second device.
  • the target CSI-RS is sent to the receiving device, until the channel is released, and the first device still uses the periodic transmission mode to the first
  • the second device transmits the CSI-RS, and does not require a large signaling overhead compared to the aperiodic transmission CSI-RS in the prior art.
  • the method for transmitting a channel state information reference signal can flexibly transmit a CSI-RS to a receiving end device without requiring a large signaling overhead.
  • the S120 determines, by the first device, the target CSI-RS from the pre-configured M-group CSI-RS, including:
  • the M sets of CSI-RSs are the three sets of CSI-RSs shown in FIG. 2, assuming that the first time is the time tA in FIG. 2, the target CSI-RS is in the second set of CSI-RSs. The third CSI-RS.
  • the target CSI-RS is determined from the pre-configured M group CSI-RS, and each group of the CSI-RS in the M group CSI-RS is in the time domain. Transmit, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other.
  • the initial transmission time of the target CSI-RS is allowed on the unlicensed carrier of the source device. The time interval between the times when the data transmission starts is the shortest, and the source device transmits the target CSI-RS to the receiving device at the initial transmission time of the target CSI-RS.
  • the interval between the time when the data is allowed to start to be transmitted on the unlicensed carrier and the time when the CSI-RS is started to be sent to the receiving end device can be effectively shortened, so that the CSI can be sent to the receiving device in time. RS.
  • the method for transmitting the channel state information reference signal can implement the CSI-RS to be sent to the receiving device in time, and can also avoid large signaling overhead.
  • the transmitting device is a base station
  • the receiving device is a UE.
  • the base station sends a CSI-RS to the UE according to the method provided by the embodiment of the present invention, so that the UE can obtain the channel state information in time, so that the channel state can be reported to the base station in time, so that the base station Corresponding scheduling decisions are made based on the channel status report.
  • the first device uses the LBT technology to occupy the unlicensed carrier, and the technology is prior art, and is not described herein for brevity.
  • the first moment involved in the embodiment of the present invention refers to a moment when the first device allows to start transmitting data after occupying the unlicensed carrier based on the contention mechanism.
  • the first moment may be an end time of the CCA process; for example, if the first device is based on After the CCA process, the CCA (Extended CCA, "ECCA”) process is also performed, and the first time is the end time of the ECCA process, which is not limited by the embodiment of the present invention.
  • CCA Clear Channel Assessment
  • the first device may determine the target CSI-RS from the pre-configured M-group CSI-RS, for example, according to the system preset information, which is not limited by the embodiment of the present invention.
  • the sending period of the CSI-RS may be specifically set according to the length of the subframe carrying the CSI-RS, for example, any length of 5ms to 80ms, or less than 5ms. This embodiment of the present invention does not limit this.
  • the M group CSI-RS is pre-configured by the system.
  • RRC Radio Resource Control
  • the M-group CSI-RS is pre-configured by the RRC, and each group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and the RRC group of the M-group CSI-RSs is Relevant information (including but not limited to the offset and transmission period) is notified to the receiving device (for example, the UE). After receiving the blind detection, the receiving end detects a valid CSI-RS, and then can be based on the known sending period. The corresponding location is received.
  • the M group CSI-RS is pre-configured by the first device.
  • the first device is an eNodeB (Evolved Node-B) in the LTE system
  • the M-group CSI-RS is pre-configured by the eNodeB, and related information of the M-group CSI-RS (including but not limited to offset) And the transmission period) is notified to the receiving device (for example, the UE).
  • M-group CSI-RS is well known for both the first device at the transmitting end and the second device at the receiving end.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • the offset of a group of CSI-RS refers to the signal start transmission time of the group CSI-RS (for example, the signal start transmission time ts of the second group CSI-RS in FIG. 2) and the reference time (as marked in FIG. 2). The time interval between the reference moments tr).
  • FIG. 2 shows three pre-configured CSI-RSs, in which the transmission period of each group of CSI-RSs is 20 ms, the offset of the first group of CSI-RSs is 0 ms, and the second group of CSI-RSs The offset is 5ms, and the offset of the third group of CSI-RS is 10ms.
  • the target CSI-RS is determined from the three sets of CSI-RSs shown in FIG. 2.
  • the initial transmission time of the first CSI-RS of the first group CSI-R is the reference time tr, that is, the distance between the first CSI-RS and the first time is the shortest, and the first time is The first CSI-RS in the group CSI-RS is determined to be the target CSI-RS, and the target CSI-RS is transmitted to the second device at the initial transmission time tr.
  • the target CSI-RS is determined from the three sets of CSI-RSs shown in FIG. As shown in FIG. 2, the initial transmission time t1 of the third CSI-RS in the second group CSI-RS is the shortest interval from the first time tA, and the third of the second group CSI-RSs.
  • the CSI-RS is determined to be the target CSI-RS, and the target CSI-RS is transmitted to the second device at the initial transmission time t1.
  • a configuration is used to periodically transmit a CSI-RS, for example, a CSI-RS is transmitted to a receiving end based on only the first group of CSI-RSs shown in FIG. 2. It is assumed that the time at which the first device is allowed to start transmitting data after the unlicensed carrier is occupied (ie, the first time) is the time tA shown in FIG. 2, as shown in FIG. 2, the first device needs to wait until the first group CSI-RS.
  • the CSI-RS can be sent to the second device at the initial transmission time t2 of the four CSI-RSs, that is, the CSI-RS cannot be sent to the receiving device in time.
  • multiple sets of CSI-RSs are pre-configured, and the CSI-RSs in different groups of CSI-RSs are not completely transmitted, and after occupying the unlicensed carriers, multiple sets of CSI-
  • the RS selects the target CSI-RS at the time when the initial transmission time distance is allowed to start transmitting data on the unlicensed carrier, and then sends the target CSI-RS to the receiving device, so that the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the sending period corresponding to the target CSI-RS is sent to the second device periodically according to the sending period corresponding to the target CSI-RS.
  • CSI-RS CSI-RS.
  • the method continues to The second device transmits the subsequent CSI-RS in the second group CSI-RS.
  • FIG. 2 is only an example and is not limited.
  • the M group CSI-RS may not only be three groups of CSI-RSs, but also five groups, ten groups or more groups.
  • the offset and transmission period of each group of CRS-RSs are not limited to the situation shown in FIG. 2.
  • the transmission period of the CSI-RS may be any duration from 5 ms to 80 ms, and the offset of the CSI-RS is, for example, Other time lengths, such as 3ms, 7ms, etc., are not limited in this embodiment of the present invention.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • FIG. 3 shows that three sets of CSI-RSs are preconfigured, each group of CSI-RSs has a bias of 0 ms, the first group of CSI-RSs has a transmission period of 11 ms, and the second group of CSI-RSs has a transmission period of 8ms, the transmission period of the third group CSI-RS is 5ms.
  • the target CSI-RS is determined from the three sets of CSI-RSs shown in FIG.
  • the initial transmission time of the first CSI-RS of the three groups of CSI-RSs is the reference time tr, and the first CSI of any one group of CSI-RSs can be selected from the three groups of CSI-RSs.
  • the RS is transmitted as the target CSI-RS.
  • the target CSI-RS is transmitted to the second device at the initial transmission time tr.
  • the target CSI-RS is determined from the three sets of CSI-RSs shown in FIG.
  • the initial transmission time t1 of the second CSI-RS in the third group CSI-RS is the shortest interval from the first time tB, and the second of the third group CSI-RSs.
  • the CSI-RS is determined to be the target CSI-RS, and the target CSI-RS is transmitted to the second device at the initial transmission time t3.
  • multiple sets of CSI-RSs are pre-configured, and the CSI-RSs in different groups of CSI-RSs are not completely transmitted, and after occupying the unlicensed carriers, multiple sets of CSI-
  • the RS selects the target CSI-RS at the time when the initial transmission time distance is allowed to start transmitting data on the unlicensed carrier, and then sends the target CSI-RS to the receiving device, so that the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the second device after the first device sends the target CSI-RS to the second device at the initial sending time of the target CSI-RS, the second device continues to the second according to the sending period of the target CSI-RS.
  • the device periodically sends CSI-RS. Specifically, in the example shown in FIG. 3, after the first device transmits the second CSI-RS (ie, the target CSI-RS) in the third group of CSI-RSs to the second device at time t3, the method continues to The second device transmits the subsequent CSI-RS in the third group CSI-RS.
  • FIG. 3 is only an example and is not limited.
  • the M group CSI-RS may be not only three groups of CSI-RSs, but also five groups, ten groups or more groups.
  • the offset and transmission period of each group of CRS-RSs are not limited to the situation shown in FIG. 3.
  • the transmission period of the CSI-RS may be any length of 5ms to 80ms, and the offset of the CSI-RS is, for example, Other time lengths, such as 3ms, 7ms, etc., are not limited in this embodiment of the present invention.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the transmission periods of the three sets of CSI-RSs are also different from each other, for example, the transmission period of the first group CSI-RS is 20 ms, and the transmission period of the second group CSI-RS is 15 ms, the third group.
  • the transmission period of the CSI-RS is 25 ms.
  • the offsets of the three sets of CSI-RSs are also different from each other, for example, the offset of the first group of CSI-RSs is 1 ms, the offset of the second group of CSI-RSs is 3 ms, and the third group of CSIs -RS offset is 10ms.
  • each group of CSI-RSs in the M group CSI-RS may be other durations.
  • the method 100 further includes:
  • the first device sends, to the second device, an indication message indicating a start sending time of the target CSI-RS.
  • the indication message may further include information indicating a bias and/or a transmission period of the target CSI-RS.
  • the offset of the target CSI-RS referred to herein refers to the offset of a group of CSI-RSs to which the target CSI-RS belongs, and the transmission period of the target CSI-RS refers to the target CSI-RS. The transmission period of the associated CSI-RS.
  • the target CSI-RS is one CSI-RS of the k-th CSI-RS in the M-group CSI-RS
  • the first device sends the second device to indicate the start of the target CSI-RS.
  • the transmission time, the offset of the k-th group CSI-RS, and an indication message of the transmission period is one CSI-RS of the k-th CSI-RS in the M-group CSI-RS
  • the first device sends the second device to indicate the start of the target CSI-RS.
  • the transmission time, the offset of the k-th group CSI-RS, and an indication message of the transmission period is one CSI-RS of the k-th CSI-RS in the M-group CSI-RS
  • the first The device only needs to inform the second device of the initial transmission time of the target CSI-RS and the offset of the group CSI-RS where the target CSI-RS is located. If the target CSI-RS does not change with respect to the CSI-RS sent after the first device last occupied the unlicensed carrier, but the transmission period changes (for example, as shown in FIG. 3), the first device only needs to inform The second device starts the transmission time and the transmission period of the target CSI-RS.
  • the first device may also notify the second device of the initial sending time, the offset, and/or the sending period of the target CSI-RS in an implicit manner. Not limited.
  • each group of CSI-RSs are periodically transmitted in the time domain, and different groups of CSI-RS transmission periods and / or the offsets are different from each other, and the RRC notifies the receiving device (for example, the UE) of the information about the M group of CSI-RSs (including but not limited to the offset and the transmission period), and the receiving end detects the validity by blind detection.
  • the CSI-RS it can be based on the known transmission cycle, in the corresponding The location is received.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the M group CSI-RS may be pre-configured by the RRC, and the receiving end detects the valid CSI-RS by blind detection, and then receives the MSI-RS according to the known transmission period, that is, In the embodiment of the present invention, the transmitting end device may not need to send signaling for indicating the related information of the target CSI-RS to the receiving end device, which can save signaling overhead.
  • the embodiment of the present invention further provides a method for determining a state information reference signal CSI-RS, where the method includes:
  • Each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is greater than 1. The integer.
  • each group of CSI-RSs in the M group CSI-RS includes a set of CSI-RSs periodically transmitted in the time domain, specifically, each group of CSI-RSs as shown in FIG. 2 includes a period in the time domain.
  • the transmission periods and/or offsets of different groups of CSI-RSs in the M-group CSI-RSs are different from each other.
  • the initial transmission times of the CSI-RSs in different groups of CSI-RSs are not completely the same, as shown in the figure.
  • the initial transmission timing of each CSI-RS in the first group CSI-RS shown in 2 is completely different from the initial transmission timing of each CSI-RS in the second group CSI-RS.
  • the executor of the embodiment of the present invention may be a sender device, such as an eNB, or an RRC, which is not limited in this embodiment of the present invention.
  • the M-group CSI-RS is notified to the sender device and the sink device.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • the sending of different groups of CSI-RSs in the M group of CSI-RSs is different and the offset is different.
  • the transmission periods of the three sets of CSI-RSs are also different from each other, for example, the transmission period of the first group CSI-RS is 20 ms, and the transmission period of the second group CSI-RS is 15 ms, the third group.
  • the transmission period of the CSI-RS is 25 ms.
  • the offsets of the three sets of CSI-RSs are also different from each other, for example, the offset of the first group of CSI-RSs is 1 ms, the offset of the second group of CSI-RSs is 3 ms, and the third group of CSIs -RS offset is 10ms.
  • each group of CSI-RSs in the M group CSI-RS may be other durations.
  • the method for transmitting a channel state information reference signal according to an embodiment of the present invention is described above with reference to FIG. 1 to FIG. 3 from the perspective of a transmitting device (first device), which is described below from the perspective of the receiving device (second device).
  • first device a transmitting device
  • second device the receiving device
  • FIG. 4 shows a schematic flow chart of a method 200 of transmitting a channel state information reference signal according to an embodiment of the present invention.
  • the second device determines a receiving location for receiving a target CSI-RS sent by the first device, where the target CSI-RS is one CSI-RS of the pre-configured M group CSI-RS, where the M group CSI-RS is used.
  • Each group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is an integer greater than one;
  • the second device receives the target CSI-RS at the receiving location based on the unlicensed carrier acquired by the first device.
  • each group of CSI-RSs in the M group CSI-RS includes a group of CSI-RSs periodically transmitted in the time domain, specifically, each group of CSIs as shown in FIG.
  • the RS includes a CSI-RS sequence that is periodically transmitted in the time domain.
  • the transmission periods and/or offsets of different groups of CSI-RSs in the M-group CSI-RSs are different from each other.
  • the initial transmission times of the CSI-RSs in different groups of CSI-RSs are not completely the same, as shown in the figure.
  • the initial transmission timing of each CSI-RS in the first group CSI-RS shown in 2 is completely different from the initial transmission timing of each CSI-RS in the second group CSI-RS.
  • the target CSI-RS is one CSI-RS in one of the M-group CSI-RSs, and the initial transmission time of the target CS-RS is in the first device. After the time at which the data is allowed to start to be transmitted on the authorized carrier (referred to as the first time), or the initial transmission time of the target CS-RS is the same time as the first time, for example, the first device acquires the unlicensed carrier, And the time at which the data transmission is allowed to start on the unlicensed carrier is as shown in FIG. At time tA, the third CSI-RS in the second group CSI-RS shown in FIG. 2 may be used as the target CSI-RS, or the third CSI-RS in the third group CSI-RS may be used. As the target CSI-RS, the fourth CSI-RS of the first group of CSI-RSs may be used as the target CSI-RS, which is not limited in the embodiment of the present invention.
  • the first device sends the initial CSI-RS based on the acquired unlicensed carrier.
  • the target CSI-RS is transmitted to the second device at a time (for example, time t1 shown in FIG. 2).
  • M groups of CSI-RSs are pre-configured, and each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods of different groups of CSI-RSs are And the offsets are different from each other.
  • the target CSI-RS is determined from the M group of CSI-RSs, and the target CSI is sent to the receiving device at the initial sending moment of the target CSI-RS. -RS.
  • a CSI-RS may be sent from a plurality of CSI-RS transmission locations to a receiving end device, which is comparable to the periodic transmission CSI-RS in the prior art. More flexible implementation of sending CSI-RS to the receiving device.
  • the transmission period of the CSI-RS refers to the transmission period of a group of CSI-RSs to which the target CSI-RS belongs, and specifically, the third CSI of the second group of CSI-RSs shown in FIG. 2 Taking the RS as the target CSI-RS as an example, after the first device sends the target CSI-RS to the second device at the initial transmission time t1 of the target CSI-RS, the following device continues the subsequent CSI based on the second group of CSI-RSs.
  • the initial transmission time of the RS transmits the CSI-RS to the second device.
  • the target CSI-RS is sent to the receiving device, until the channel is released, and the first device still uses the periodic transmission mode to the first
  • the second device transmits the CSI-RS, and does not require a large signaling overhead compared to the aperiodic transmission CSI-RS in the prior art.
  • the method for transmitting a channel state information reference signal can flexibly transmit a CSI-RS to a receiving end device without requiring a large signaling overhead.
  • the target CSI-RS is a CSI-RS that is closest to the first time in the M-group CSI-RS, and the first time is that the first device is in the The time at which the start of data transmission is allowed on the unlicensed carrier.
  • the target CSI-RS is determined from the pre-configured M group CSI-RS, and the initial sending time of the target CSI-RS is at the non-
  • the time interval between the times when the authorized carrier is allowed to start transmitting data is the shortest, and the source device transmits the target CSI-RS to the receiving end device at the initial transmission time of the target CSI-RS.
  • the transmitting device is a base station
  • the receiving device is a UE.
  • the base station sends a CSI-RS to the UE according to the method provided by the embodiment of the present invention, so that the UE can obtain the channel state information in time, so that the channel state can be reported to the base station in time, so that the base station Corresponding scheduling decisions are made based on the channel status report.
  • the second device determines the receiving location of one CSI-RS, and then receives the CSI-RS at the corresponding location according to the learned transmission period. Specifically, the second device may learn the receiving location of the CSI-RS by blindly detecting or receiving an indication message sent by the first device at the transmitting end.
  • the S210 determines, by the second device, a receiving location for receiving the target CSI-RS sent by the first device, including:
  • the second device determines the receiving location by blind detection or by receiving an indication message sent by the first device to indicate the receiving location.
  • the second device receives an indication message that is sent by the first device to indicate an initial sending time, an offset, and/or a sending period of the target CSI-RS, and the second device determines to receive according to the indication message.
  • the receiving position of the target CSI-RS is the first device to indicate an initial sending time, an offset, and/or a sending period of the target CSI-RS.
  • each group of CSI-RSs are periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, RRC Notifying the related information (including but not limiting the offset and transmission period) of the M group of CSI-RSs to the receiving device (for example, the UE), and the receiving end detects the valid CSI-RS through blind detection, and then Reception is performed at the corresponding location according to the known transmission period.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • three sets of CSI-RSs are pre-configured, and the transmission period of each group of CSI-RSs is 20 ms, the offset of the first group of CSI-RSs is 0 ms, and the offset of the second group of CSI-RSs is performed. For 5ms, the offset of the third group of CSI-RS is 10ms.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • three sets of CSI-RSs are pre-configured, and the offset of each group of CSI-RSs is 0, the transmission period of the first group of CSI-RSs is 11 ms, and the transmission period of the second group of CSI-RSs is For 8 ms, the transmission period of the third group CSI-RS is 5 ms.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the transmission periods of the three sets of CSI-RSs in FIG. 2 are different from each other, and the offsets of the three sets of CSI-RSs shown in FIG. 3 are different from each other.
  • M group CSI-RS A detailed description of the M group CSI-RS is described above, and is not described here for brevity.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the transmitting end device may not need to send signaling for indicating the related information of the target CSI-RS to the receiving end device, and the M group CSI-RS may be pre-configured by the RRC, and the receiving end detects the valid by blind detection. After the CSI-RS, it can be received at the corresponding location according to the known transmission period, which can save signaling overhead.
  • a method for transmitting a channel state information reference signal according to an embodiment of the present invention is described above with reference to FIG. 1 to FIG. 4, and an apparatus for transmitting a channel state information reference signal according to an embodiment of the present invention is described below with reference to FIGS.
  • FIG. 5 shows a schematic block diagram of an apparatus 300 for transmitting a channel state information reference signal according to an embodiment of the present invention.
  • the device 300 includes:
  • An obtaining module 310 configured to acquire an unlicensed carrier
  • the determining module 320 is configured to determine, from the pre-configured M group CSI-RS, a target CSI-RS, where each group of CSI-RSs is periodically sent in the time domain, and different groups of CSI-RSs The transmission period and/or the offset are different from each other, and M is an integer greater than one;
  • the sending module 330 is configured to send the target CSI-RS to the second device according to the unlicensed carrier acquired by the acquiring module, at a start sending time of the target CSI-RS determined by the determining module.
  • M groups of CSI-RSs are pre-configured, and each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and transmission periods and/or offsets of different groups of CSI-RSs are performed.
  • the target CSI-RS is determined from the M group of CSI-RSs, and the target CSI-RS is sent to the receiving device at the initial transmission time of the target CSI-RS.
  • a CSI-RS may be sent from a plurality of CSI-RS transmission locations to a receiving end device, which is comparable to the periodic transmission CSI-RS in the prior art. More flexible implementation of sending CSI-RS to the receiving device.
  • the transmission period of the CSI-RS refers to the transmission period of a group of CSI-RSs to which the target CSI-RS belongs, and specifically, the third CSI of the second group of CSI-RSs shown in FIG. 2 Taking the RS as the target CSI-RS as an example, after the first device sends the target CSI-RS to the second device at the initial transmission time t1 of the target CSI-RS, the following device continues the subsequent CSI based on the second group of CSI-RSs.
  • the initial transmission time of the RS transmits the CSI-RS to the second device.
  • the target CSI-RS is sent to the receiving device, until the channel is released, and the first device still uses the periodic transmission mode to the first
  • the second device transmits the CSI-RS, and does not require a large signaling overhead compared to the aperiodic transmission CSI-RS in the prior art.
  • the device for transmitting the channel state information reference signal can transmit the CSI-RS to the receiving device more flexibly, and does not require a large signaling overhead.
  • the determining module is specifically configured to determine, as the target CSI-RS, a CSI-RS that is closest to the first time in the initial transmission time of the M-group CSI-RS. A moment is when the first device allows to start transmitting data on the unlicensed carrier.
  • the target CSI-RS is determined from the pre-configured M group CSI-RS, and each group of CSI-RSs in the M group CSI-RS is periodically sent in the time domain, and The transmission periods and/or offsets of different groups of CSI-RSs are different from each other.
  • the time interval is the shortest, and the target CSI-RS is transmitted to the receiving device at the initial transmission time of the target CSI-RS.
  • the interval between the time when the data is allowed to start to be transmitted on the unlicensed carrier and the time when the CSI-RS is started to be sent to the receiving end device can be effectively shortened, so that the CSI can be sent to the receiving device in time. RS.
  • the non-authorized carrier After occupying an unlicensed carrier, the non-authorized carrier
  • the CSI-RS is also transmitted on the wave in a periodic transmission manner, so the large signaling overhead required in the existing aperiodic transmission scheme is not required.
  • the method for transmitting the channel state information reference signal can implement the CSI-RS to be sent to the receiving device in time, and can also avoid large signaling overhead.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the sending module is further configured to send, to the second device, an indication message for indicating a start sending time of the target CSI-RS.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the M group CSI-RS may be pre-configured by the RRC, and the receiving end detects the valid CSI-RS by blind detection, and then receives the MSI-RS according to the known transmission period, that is, In the embodiment of the present invention, the transmitting end device may not need to send signaling for indicating the related information of the target CSI-RS to the receiving end device, which can save signaling overhead.
  • the apparatus 300 provided by the embodiment of the present invention may correspond to the first device in the method for transmitting a channel state information reference signal according to the embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the device 300 respectively In order to implement the corresponding processes of the respective methods in FIG. 1 to FIG. 4, for brevity, details are not described herein again.
  • FIG. 6 shows a schematic block diagram of an apparatus 400 for transmitting a channel state information reference signal according to an embodiment of the present invention.
  • the device 400 includes:
  • the determining module 410 is configured to determine a receiving location for receiving a target CSI-RS sent by the first device, where the target CSI-RS is one CSI-RS of the pre-configured M group CSI-RS, the M group CSI-RS Each group of CSI-RSs is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is an integer greater than one;
  • the receiving module 420 is configured to receive the target CSI-RS at the receiving location determined by the determining module based on the unlicensed carrier acquired by the first device.
  • M groups of CSI-RSs are pre-configured, and each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and transmission periods and/or offsets of different groups of CSI-RSs are performed.
  • the target CSI-RS is determined from the M group of CSI-RSs, and the target CSI-RS is sent to the receiving device at the initial transmission time of the target CSI-RS.
  • a CSI-RS may be sent from a plurality of CSI-RS transmission locations to a receiving end device, which is comparable to the periodic transmission CSI-RS in the prior art. More flexible implementation of sending CSI-RS to the receiving device.
  • the target CSI-RS is sent to the receiving device, until the channel is released, and the first device still uses the periodic transmission mode to the first
  • the second device transmits the CSI-RS, and does not require a large signaling overhead compared to the aperiodic transmission CSI-RS in the prior art.
  • the device for transmitting the channel state information reference signal can transmit the CSI-RS to the receiving device more flexibly, and does not require a large signaling overhead.
  • the target CSI-RS is a CSI-RS that is closest to the first moment in the M-group CSI-RS, and the first moment is that the first device is not authorized. The time at which the start of data transmission is allowed on the carrier.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the determining module is specifically configured to perform blind detection, or The receiving location is determined by receiving an indication message sent by the first device to indicate the receiving location.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the M group CSI-RS may be pre-configured by the RRC, and the receiving end detects the valid CSI-RS by blind detection, and then receives the MSI-RS according to the known transmission period, that is, In the embodiment of the present invention, the transmitting end device may not need to send signaling for indicating the related information of the target CSI-RS to the receiving end device, which can save signaling overhead.
  • the apparatus 400 provided by the embodiment of the present invention may correspond to the second device in the method for transmitting a channel state information reference signal according to the embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the device 400 respectively In order to implement the corresponding processes of the respective methods in FIG. 1 to FIG. 4, for brevity, details are not described herein again.
  • FIG. 7 shows a schematic block diagram of an apparatus 500 for transmitting channel state information reference signals according to an embodiment of the present invention.
  • the device 500 includes a processor 510, a memory 520, a bus system 530, a receiver 540, and a transmitter 550.
  • the processor 510, the memory 520, the receiver 540 and the transmitter 550 are connected by a bus system 530 for storing instructions for executing instructions stored in the memory 520 to control the receiver 540 to receive.
  • Signal and control transmitter 550 to send a signal.
  • the processor 510 is configured to acquire, by the first device, an unlicensed carrier, where the first device determines, from the pre-configured M-group CSI-RS, a target CSI-RS, each group of CSI-RSs in the M-group CSI-RS. Transmitted periodically in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is an integer greater than 1; the transmitter 550 is configured to send a start time of the target CSI-RS. The second device transmits the target CSI-RS.
  • M groups of CSI-RSs are pre-configured, and each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and transmission periods and/or offsets of different groups of CSI-RSs are performed.
  • the target CSI-RS is determined from the M group of CSI-RSs, and the target CSI-RS is sent to the receiving device at the initial transmission time of the target CSI-RS.
  • a CSI-RS may be sent from a plurality of CSI-RS transmission locations to a receiving end device, which is comparable to the periodic transmission CSI-RS in the prior art. More flexible implementation of sending CSI-RS to the receiving device.
  • the transmission period of the CSI-RS refers to the transmission period of a group of CSI-RSs to which the target CSI-RS belongs, and specifically, the third CSI of the second group of CSI-RSs shown in FIG. 2 Taking the RS as the target CSI-RS as an example, after the first device sends the target CSI-RS to the second device at the initial transmission time t1 of the target CSI-RS, the following device continues the subsequent CSI based on the second group of CSI-RSs.
  • the initial transmission time of the RS transmits the CSI-RS to the second device.
  • the target CSI-RS is sent to the receiving device, until the channel is released, and the first device still uses the periodic transmission mode to the first
  • the second device transmits the CSI-RS, and does not require a large signaling overhead compared to the aperiodic transmission CSI-RS in the prior art.
  • the device for transmitting the channel state information reference signal can transmit the CSI-RS to the receiving device more flexibly, and does not require a large signaling overhead.
  • the processor 510 is specifically configured to determine, in the M-group CSI-RS, a CSI-RS that is closest to the first time in the initial transmission time as the target CSI-RS, where The first moment is a moment when the first device allows to start transmitting data on the unlicensed carrier.
  • the target CSI-RS is determined from the pre-configured M group CSI-RS, and each group of CSI-RSs in the M group CSI-RS is periodically sent in the time domain, and The transmission periods and/or offsets of different groups of CSI-RSs are different from each other.
  • the time interval is the shortest, and the target CSI-RS is transmitted to the receiving device at the initial transmission time of the target CSI-RS.
  • the interval between the time when the data is allowed to start to be transmitted on the unlicensed carrier and the time when the CSI-RS is started to be sent to the receiving end device can be effectively shortened, so that the CSI can be sent to the receiving device in time. RS.
  • the CSI-RS after occupying an unlicensed carrier, the CSI-RS is also transmitted on the unlicensed carrier by using a periodic transmission manner, thus eliminating the need for the existing non-periodic transmission scheme. Large signaling overhead.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the transmitter 550 is configured to send, by the first device, an indication message for indicating a start sending time of the target CSI-RS to the second device.
  • the processor 510 may be a central processing unit (“CPU"), and the processor 510 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 520 can include read only memory and random access memory and provides instructions and data to the processor 510. A portion of the memory 520 may also include a non-volatile random access memory. For example, the memory 520 can also store information of the device type.
  • the bus system 530 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 530 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 510 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 520, and the processor 510 reads the information in the memory 520 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the M group CSI-RS may be pre-configured by the RRC, and the receiving end detects the valid CSI-RS by blind detection, and then receives the MSI-RS according to the known transmission period, that is, In the embodiment of the present invention, the transmitting end device may not need to send signaling for indicating the related information of the target CSI-RS to the receiving end device, which can save signaling overhead.
  • the device 500 provided by the embodiment of the present invention may correspond to the first device in the method for transmitting a channel state information reference signal according to the embodiment of the present invention, or may correspond to the device 300 according to the embodiment of the present invention, and the device 500
  • the above and other operations and/or functions of the respective modules are respectively implemented in order to implement the respective processes of the respective methods in FIG. 1 to FIG. 4, and are not described herein again for brevity.
  • FIG. 8 shows a schematic block diagram of an apparatus 600 for transmitting a channel state information reference signal according to an embodiment of the present invention.
  • the device 600 includes a processor 610, a memory 620, a bus system 630, a receiver 640, and a transmitter 660.
  • the processor 610, the memory 620, the receiver 640, and the transmitter 650 are connected by a bus system 630.
  • the memory 620 is configured to store instructions for executing the instructions stored in the memory 620 to control the receiver 640 to receive. Signal and control transmitter 660 to send a signal.
  • the processor 610 is configured to determine, to receive, a receiving location of a target CSI-RS sent by the first device, where the target CSI-RS is one CSI-RS of the pre-configured M group CSI-RS, the M group CSI Each group of CSI-RSs in the RS is periodically transmitted in the time domain, and the transmission periods and/or offsets of different groups of CSI-RSs are different from each other, and M is an integer greater than 1; the receiver 630 is configured to, according to the receiving location Receiving the target CSI-RS.
  • M groups of CSI-RSs are pre-configured, and each group of CSI-RSs in the M group of CSI-RSs is periodically transmitted in the time domain, and transmission periods and/or offsets of different groups of CSI-RSs are performed.
  • the target CSI-RS is determined from the M group of CSI-RSs, and the target CSI-RS is sent to the receiving device at the initial transmission time of the target CSI-RS.
  • a CSI-RS may be sent from a plurality of CSI-RS transmission locations to a receiving end device, which is comparable to the periodic transmission CSI-RS in the prior art. More flexible implementation of sending CSI-RS to the receiving device.
  • the target CSI-RS is sent to the receiving device, until the channel is released, and the first device still uses the periodic transmission mode to the first
  • the second device transmits the CSI-RS, and does not require a large signaling overhead compared to the aperiodic transmission CSI-RS in the prior art.
  • the device for transmitting the channel state information reference signal can transmit the CSI-RS to the receiving device more flexibly, and does not require a large signaling overhead.
  • the processor 510 is specifically configured to determine, in the M-group CSI-RS, a CSI-RS that is closest to the first time in the initial transmission time as the target CSI-RS, where The first moment is a moment when the first device allows to start transmitting data on the unlicensed carrier.
  • multiple groups of CSI-RSs are pre-configured, and different groups of CSI-RSs are used.
  • the offset and/or the transmission period are different from each other.
  • the target CSI-RS is selected from the plurality of groups of CSI-RSs at the time when the initial transmission time distance is allowed to start transmitting data on the unlicensed carrier. Then, the target CSI-RS is sent to the receiving end device, and the CSI-RS can be sent to the receiving end device in time. In other words, the CSI-RS transmission opportunity can be increased, thereby improving the transmission efficiency of the CSI-RS.
  • different groups of CSI-RSs in the M group of CSI-RSs have the same transmission period and different offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and the same offsets.
  • different groups of CSI-RSs in the M group of CSI-RSs have different transmission periods and different offsets.
  • the processor 610 is configured to determine the receiving location by blind detection or by receiving an indication message sent by the first device to indicate the receiving location.
  • multiple sets of CSI-RSs are pre-configured, and offsets and/or transmission periods of different sets of CSI-RSs are different from each other, and after occupying unlicensed carriers, multiple CSI-RSs are selected.
  • the initial transmission time is the distance from the nearest target CSI-RS at the time when the data is allowed to start transmitting on the unlicensed carrier, and then the target CSI-RS is sent to the receiving device, and the CSI-RS can be sent to the receiving device in time. In other words, it is possible to increase the transmission opportunity of the CSI-RS, thereby improving the transmission efficiency of the CSI-RS.
  • the M group CSI-RS may be pre-configured by the RRC, and the receiving end detects the valid CSI-RS by blind detection, and then receives the MSI-RS according to the known transmission period, that is, In the embodiment of the present invention, the transmitting end device may not need to send signaling for indicating the related information of the target CSI-RS to the receiving end device, which can save signaling overhead.
  • the device 600 provided by the embodiment of the present invention may correspond to the second device in the method for transmitting a channel state information reference signal according to the embodiment of the present invention, and may also correspond to the device 500 according to the embodiment of the present invention, and the device 600
  • the above and other operations and/or functions of the respective modules are respectively implemented in order to implement the respective processes of the respective methods in FIG. 1 to FIG. 4, and are not described herein again for brevity.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明实施例提供一种传输信道状态信息参考信号CSI-RS的方法和设备，该方法包括：第一设备获取非授权载波；该第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；该第一设备基于该非授权载波，在该目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS。根据本发明实施例提供的传输CSI-RS的方法和设备，能够较为灵活地选择发送位置(即发送时刻)向接收端设备发送CSI-RS，且无需较大信令开销。

Description

传输信道状态信息参考信号的方法和设备 技术领域
本发明实施例涉及通信领域，并且更具体地，涉及一种传输信道状态信息参考信号CSI-RS的方法和设备。
背景技术
在无线通信网络中，各个设备需要利用频率资源进行信息传输，频率资源也被称为频谱。无线通信系统使用的频谱分为授权频谱(Licensed Spectrum)和非授权频谱(Unlicensed Spectrum)，其中，授权频谱需要获得授权之后才可以使用，非授权频谱不需要授权，任何人都可以合法的使用。授权频谱上的载波称为授权载波，非授权频谱上的载波称为非授权载波。
在长期演进的非授权频谱(Licensed-Assisted Access Using Long Term Evolution，简称为“LAA-LTE”)系统中，节点通过说前先听(Listen Before Talk，简称为“LBT”)原则使用非授权载波，LBT是一种载波监听多路访问(Carrier Sense Multiple Access，简称为“CSMA”)技术。
信道状态信息参考信号(Channel State Information-Reference Signal，简称为“CSI-RS”)是用于用户设备UE获取信道状态信息的下行参考信号。在LAA-LTE中，eNB通过LBT原则抢占信道后，向UE发送CSI-RS，CSI-RS在时域上可以周期性传输也可以非周期性传输。其中，在周期性传输CSI-RS时，由于eNB抢占到信道的时刻是随机的，而发送CSI-RS的位置(即时刻)是确定的，因此会出现不能及时向UE发送CSI-RS的问题，从而导致UE不能及时获取信道状态信息；而在非周期性传输CSI-RS时，eNB需要频繁地向UE发送信令来指示每一次CSI-RS的发送位置，信令开销较大。
发明内容
本发明实施例提供一种传输信道状态信息参考信号CSI-RS的方法和设备，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
第一方面，提供了一种传输信道状态信息参考信号CSI-RS的方法，该方法包括：
第一设备获取非授权载波；
该第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
该第一设备基于该非授权载波，在该目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS。
结合第一方面，在第一方面的第一种实现方式中，该第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，包括：
该第一设备将该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为该目标CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
结合第一方面或第一方面的第一种实现方式，在第一方面的第二种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
结合第一方面或第一方面的第一种实现方式，在第一方面的第三种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
结合第一方面或第一方面的第一种实现方式，在第一方面的第四种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
结合第一方面及其上述实现方式，在第一方面的第五种实现方式中，该方法还包括：
该第一设备向该第二设备发送用于指示该目标CSI-RS的起始发送时刻的指示消息。
第二方面，提供了传输信道状态信息参考信号CSI-RS的方法，该方法包括：
第二设备确定用于接收第一设备发送的目标CSI-RS的接收位置，该目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，该M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
该第二设备基于该第一设备获取的非授权载波，在该接收位置接收该目标CSI-RS。
结合第二方面，在第二方面的第一种实现方式中，该目标CSI-RS为该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
结合第二方面或第二方面的第一种实现方式，在第二方面的第二种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
结合第二方面或第二方面的第一种实现方式，在第二方面的第三种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
结合第二方面或第二方面的第一种实现方式，在第二方面的第四种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
结合第二方面及其上述实现方式，在第二方面的第五种实现方式中，该第二设备确定用于接收第一设备发送的目标CSI-RS的接收位置，包括：
该第二设备通过盲检测，或者通过接收该第一设备发送的用于指示该接收位置的指示消息，确定该接收位置。
第三方面，提供了一种传输信道状态信息参考信号CSI-RS的设备，该设备包括：
获取模块，用于获取非授权载波；
确定模块，用于从预配置的M组CSI-RS中，确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
发送模块用于，基于该获取模块获取的该非授权载波，在该确定模块确定的该目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS。
结合第三方面，在第三方面的第一种实现方式中，该确定模块具体用于，将该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为该目标CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
结合第三方面或第三方面的第一种实现方式，在第三方面的第二种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
结合第三方面或第三方面的第一种实现方式，在第三方面的第三种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
结合第三方面或第三方面的第一种实现方式，在第三方面的第四种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
结合第三方面及其上述实现方式，在第三方面的第五种实现方式中，该发送模块还用于，向该第二设备发送用于指示该目标CSI-RS的起始发送时刻的指示消息。
第四方面，提供了一种传输信道状态信息参考信号CSI-RS的设备，该设备包括：
确定模块，用于确定用于接收第一设备发送的目标CSI-RS的接收位置，该目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，该M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
接收模块，用于基于该第一设备获取的非授权载波，在该确定模块确定的该接收位置接收该目标CSI-RS。
结合第四方面，在第四方面的第一种实现方式中，该目标CSI-RS为该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
结合第四方面或第四方面的第一种实现方式，在第四方面的第二种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
结合第四方面或第四方面的第一种实现方式，在第四方面的第三种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
结合第四方面或第四方面的第一种实现方式，在第四方面的第四种实现方式中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
结合第四方面及其上述实现方式，在第四方面的第五种实现方式中，该确定模块具体用于，通过盲检测，或者通过接收该第一设备发送的用于指示该接收位置的指示消息，确定该接收位置。
基于上述技术方案，在本发明实施例中，发送端设备获取非授权载波后，从预配置的M组CSI-RS中确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备在目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。相比于现有技术，能够较为灵活地选择发送位置(即发送时刻)向接收端设备发送CSI-RS，且无需较大信令开销。
附图说明
为了更清楚地说明本发明实施例的技术方案，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 性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1示出了根据本发明实施例提供的传输CSI-RS的方法的示意性流程图。
图2示出了根据本发明实施例提供的传输CSI-RS的方法的示意图。
图3示出了根据本发明实施例提供的传输CSI-RS的方法的另一示意图。
图4示出了根据本发明实施例提供的传输CSI-RS的方法的示意性流程图。
图5示出了根据本发明实施例提供的传输CSI-RS的设备的示意性框图。
图6示出了根据本发明实施例提供的传输CSI-RS的设备的另一示意性框图。
图7示出了根据本发明实施例提供的传输CSI-RS的设备的再一示意性框图。
图8示出了根据本发明实施例提供的传输CSI-RS的设备的再一示意性框图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例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作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例中涉及到的设备可以是长期演进的非授权频谱(Licensed-Assisted Access Using Long Term Evolution，简称为“LAA-LTE”)系统中的设备，还可以是其他系统中的设备，例如：长期演进(Long Term Evolution，简称为“LTE”)系统、LTE频分双工(Frequency Division Duplex，简称为“FDD”)系统、LTE时分双工(Time Division Duplex，简称为“TDD”)、全球移动通讯(Global System of Mobile communication，简称为“GSM”)系统、码分多址(Code Division Multiple Access，简称为“CDMA”)系统、宽带码分多址(Wideband Code Division Multiple Access，简称为“WCDMA”)系统、通用分组无线业务(General Packet Radio Service，简称为“GPRS”)、通用移动通信系统(Universal Mobile Telecommunication System，简称为“UMTS”)等，本发明实施例对此不作限定。
可选地，在本发明实施例涉及的设备可以是用户设备，也可以是网络侧设备，本发明实施例对此不作限定。
其中，该用户设备(User Equipment，简称为“UE”)也可称之为终端设备、移动台(Mobile Station，简称为“MS”)、移动终端(Mobile Terminal)等，该终端设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，该终端设备可以是移动电话(或称为“蜂窝”电话)、具有移动终端的计算机等，例如，该终端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，可以与无线接入网交换语言和/或数据。该网络侧设备可以是基站，具体地，可以是长期演进(Long Term Evolution，简称为“LTE”)系统中的演进型基站(Evolutional Node B，简称为“ENB”或“E-NodeB”)，该网络侧设备还可以是接入点(Access Point，简称为“AP”)设备。
图1示出了根据本发明实施例提供的一种传输信道状态信息参考信号CSI-RS的方法100，该方法100包括：
S110，第一设备获取非授权载波；
S120，该第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
S130，该第一设备基于该非授权载波，在该目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS。
具体地，例如第一设备通过LBT原则抢占信道，获取非授权载波。
应理解，在本发明实施例中，M组CSI-RS中的每组CSI-RS包括一组在时域上周期发送的CSI-RS，具体地如图2中所示的每一组CSI-RS包括在时域上周期发送的CSI-RS序列。M组CSI-RS中的不同组CSI-RS的发送周期和/或偏置互不相同，换句话说，不同组CSI-RS中的各个CSI-RS的起始发送时刻不完全相同，如图2中所示的第1组CSI-RS中的每个CSI-RS的起始发送时刻与第2组CSI-RS中的每个CSI-RS的起始发送时刻完全不同。
还应理解，该目标CSI-RS为M组CSI-RS中的其中一组周期发送的CSI-RS中的一个CSI-RS，且该目标CS-RS的起始发送时刻在第一设备在非授权载波上允许开始发送数据的时刻(记为第一时刻)之后，或者该目标CS-RS的起始发送时刻与该第一时刻为同一时刻，具体地，例如第一设备获 取非授权载波，且在该非授权载波上允许开始发送数据的时刻为图2中所示的时刻tA，可以将图2中所示的第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS，也可以将第3组CSI-RS中的第3个CSI-RS作为该目标CSI-RS，或者也可以将第1组CSI-RS的第4个CSI-RS作为该目标CSI-RS，本发明实施例对此不作限定。
具体地，假设在S120中将第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS，则第一设备基于获取的非授权载波，在该目标CSI-RS的起始发送时刻(例如图2中所示的时刻t1)向第二设备发送该目标CSI-RS。
由上可知，在本发明实施例中，预配置了M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备获取非授权载波后，从该M组CSI-RS中确定目标CSI-RS，在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。换句话说，在本发明实施例中，可以从多个CSI-RS发送位置中选择一个目标位置向接收端设备发送CSI-RS，相比于现有技术中的周期性传输CSI-RS，能够较为灵活地实现向接收端设备发送CSI-RS。
还应理解，在第一设备向第二设备发送该目标CSI-RS之后，继续基于该目标CSI-RS的发送周期，在相应的位置(时刻)向第二设备发送CSI-RS，其中该目标CSI-RS的发送周期指的是该目标CSI-RS所属的一组CSI-RS的发送周期，具体地，还以将图2中所示的第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS为例，第一设备在该目标CSI-RS的起始发送时刻t1向第二设备发送该目标CSI-RS之后，继续基于该第2组CSI-RS的后续CSI-RS的起始发送时刻，向第二设备发送CSI-RS。换句话说，在本发明实施例中，从目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS开始，一直到释放信道，第一设备依然是采用周期性传输方式向第二设备传输CSI-RS的，相比于现有技术中的非周期性传输CSI-RS，无需较大的信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的方法，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
可选地，在本发明实施例中，S120该第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，包括：
该第一设备将该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为该目标CSI-RS，该第一时刻为该第一设备在该非授权载波上 允许开始发送数据的时刻。
具体地，假设该M组CSI-RS为图2中所示的3组CSI-RS，假设第一时刻为图2中的时刻tA，则该目标CSI-RS为第2组CSI-RS中的第3个CSI-RS。
在本发明实施例中，发送端设备占用非授权载波后，从预配置的M组CSI-RS中确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，在该M组CSI-RS中，该目标CSI-RS的起始发送时刻与该发送端设备在非授权载波上允许开始发送数据的时刻之间的时间间隔最短，发送端设备在目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。相比于现有技术，能够有效地缩短在非授权载波上允许开始发送数据的时刻与开始向接收端设备发送CSI-RS的时刻之间的间隔，从而能够实现及时向接收端设备发送CSI-RS。
因此，根据本发明实施例提供的传输信道状态信息参考信号的方法，能够实现及时向接收端设备发送CSI-RS，同时也能够避免较大信令开销。
例如发送端设备为基站，接收端设备为UE，基站根据本发明实施例提供的方法向UE发送CSI-RS，从而使得UE能够及时获取信道状态信息，从而能够及时上报信道状态给基站，使得基站根据信道状态报告作相应的调度决策。
应理解，在本发明实施例中，第一设备使用LBT技术占用非授权载波，该技术为现有技术，为了简洁，这里不再赘述。
还应理解，在本发明实施例中涉及的第一时刻，指的是第一设备基于竞争机制占用非授权载波后允许开始发送数据的时刻。具体地，如果第一设备基于信道空闲评估(Clear Channel Assessment，简称为“CCA”)过程占用非授权载波，则该第一时刻可以为CCA过程的结束时刻；再例如，如果第一设备在基于CCA过程之后，还要执行增强CCA(Extended CCA，简称为“ECCA”)过程，则该第一时刻为ECCA过程的结束时刻，本发明实施例对此不作限定。
应理解，在S120中，第一设备例如还可以根据系统预设信息，从预配置的M组CSI-RS中，确定目标CSI-RS，本发明实施例对此不作限定。
还应理解，在本发明实施例中，CSI-RS的发送周期可以根据承载CSI-RS的子帧长度具体设定，例如为5ms至80ms中的任意时长，也可以小于5ms， 本发明实施例对此不作限定。
可选地，在本发明实施例中，M组CSI-RS由系统预配置。
具体地，例如由无线资源控制(Radio Resource Control，简称为“RRC”)预配置。
例如由RRC预配制M组CSI-RS，每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，RRC将该M组CSI-RS的相关信息(包括但不限定偏置和发送周期)通知给接收端设备(例如UE)，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收。
可选地，在本发明实施例中，M组CSI-RS由该第一设备预配置。
具体地，例如该第一设备为LTE系统中的eNodeB(Evolved Node-B)，由eNodeB预配置该M组CSI-RS，并将该M组CSI-RS的相关信息(包括但不限定偏置和发送周期)通知给接收端设备(例如UE)。
还应理解，M组CSI-RS对于发送端的第一设备和接收端的第二设备都是公知的。
可选地，在本发明实施例，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
应理解，一组CSI-RS的发送周期指的是该组CSI-RS中相邻CSI-RS的发送时刻之间的时间间隔(如图2中所示的第一组CSI-RS的发送周期T＝20ms)。一组CSI-RS的偏置指的是该组CSI-RS的信号起始发送时刻(例如图2中第二组CSI-RS的信号起始发送时刻ts)与参考时刻(如图2中标注的参考时刻tr)之间的时间间隔。
具体地，图2示出了预配置的3组CSI-RS，其中，每组CSI-RS的发送周期均为20ms，第1组CSI-RS的偏置为0ms，第2组CSI-RS的偏置为5ms，第3组CSI-RS的偏置为10ms。
例如，假设第一设备占用非授权载波后允许开始发送数据的时刻(即第一时刻)为图2所示的参考时刻tr，从图2所示的3组CSI-RS中确定目标CSI-RS，如图2所示，第1组CSI-R的首个CSI-RS的起始发送时刻就是该参考时刻tr，即该首个CSI-RS距离第一时刻的距离最短，则将该第1组CSI-RS中的首个CSI-RS确定为目标CSI-RS，则在该起始发送时刻tr向第二设备发送该目标CSI-RS。
再例如，假设第一设备占用非授权载波后允许开始发送数据的时刻(即第一时刻)为图2所示的时刻tA，从图2所示的3组CSI-RS中确定目标CSI-RS，如图2所示，第2组CSI-RS中的第3个CSI-RS的起始发送时刻t1距离本次第一时刻tA的间隔最短，将该第2组CSI-RS中的第3个CSI-RS确定为目标CSI-RS，则在该起始发送时刻t1向第二设备发送该目标CSI-RS。
在现有技术中采用一种配置周期性传输CSI-RS，例如只基于图2中所示的第1组CSI-RS向接收端发送CSI-RS。假设第一设备占用非授权载波后允许开始发送数据的时刻(即第一时刻)为图2所示的时刻tA，如图2所示，则第一设备需要等到第1组CSI-RS的第4个CSI-RS的起始发送时刻t2才可以向第二设备发送CSI-RS，即无法实现及时向接收端设备发送CSI-RS。
由上可知，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS中的CSI-RS的发送位置不完全相同，在占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够实现及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。
应理解，在第一设备在目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS之后，按照该目标CSI-RS对应的发送周期在相应的发送时刻向第二设备周期发送CSI-RS。具体地，在图2所示的例子中，在第一设备在时刻t1向第二设备发送第2组CSI-RS中的第3个CSI-RS(即目标CSI-RS)之后，继续向第二设备发送第2组CSI-RS中的后续CSI-RS。
还应理解，图2仅作为示例而非限定，例如，在实际应用中，M组CSI-RS不只可以为3组CSI-RS，也可以为5组，10组或更多组。再例如，每组CRS-RS的偏置和发送周期也不局限于图2所示的情形，例如CSI-RS的发送周期可以为5ms至80ms中的任意时长，CSI-RS的偏置例如为3ms，7ms等其它时长，本发明实施例对此不作限定。
可选地，在本发明实施例，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
具体地，图3示出了预配置3组CSI-RS，每组CSI-RS的偏置均为0ms，第1组CSI-RS的发送周期为11ms，第2组CSI-RS的发送周期为8ms，第3组CSI-RS的发送周期为5ms。
例如，假设第一设备占用非授权载波后允许开始发送数据的时刻(即第一时刻)为图3所示的参考时刻tr，从图3所示的3组CSI-RS中确定目标CSI-RS，如图3所示，3组CSI-RS的首个CSI-RS的起始发送时刻就是该参考时刻tr，可以从这3组CSI-RS中选择任意一组CSI-RS的首个CSI-RS作为目标CSI-RS，进行发送。例如选择第1组CSI-RS的首个CSI-RS作为目标CSI-RS，则在该起始发送时刻tr向第二设备发送该目标CSI-RS。
再例如，假设第一设备占用非授权载波后允许开始发送数据的时刻(即第一时刻)为图3所示的时刻tB，从图3所示的3组CSI-RS中确定目标CSI-RS，如图3所示，第3组CSI-RS中的第2个CSI-RS的起始发送时刻t1距离本次第一时刻tB的间隔最短，将该第3组CSI-RS中的第2个CSI-RS确定为目标CSI-RS，则在该起始发送时刻t3向第二设备发送该目标CSI-RS。
由上可知，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS中的CSI-RS的发送位置不完全相同，在占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够实现及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。
应理解，在本发明实施例中，在第一设备在目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS之后，是按照该目标CSI-RS的发送周期继续向第二设备周期发送CSI-RS的。具体地，在图3所示的例子中，在第一设备在时刻t3向第二设备发送第3组CSI-RS中的第2个CSI-RS(即目标CSI-RS)之后，继续向第二设备发送第3组CSI-RS中的后续CSI-RS。
还应理解，图3仅作为示例而非限定，例如，在实际应用中，M组CSI-RS不只可以为3组CSI-RS，也可以为5组，10组或更多组。再例如，每组CRS-RS的偏置和发送周期也不局限于图3所示的情形，例如CSI-RS的发送周期可以为5ms至80ms中的任意时长，CSI-RS的偏置例如为3ms，7ms等其它时长，本发明实施例对此不作限定。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
具体地，例如在图2中，3组CSI-RS的发送周期也互不相同，例如第1组CSI-RS的发送周期为20ms，第2组CSI-RS的发送周期为15ms，第3组 CSI-RS的发送周期为25ms。
再例如，在图3中，3组CSI-RS的偏置也互不相同，例如第1组CSI-RS的偏置为1ms，第2组CSI-RS的偏置为3ms，第3组CSI-RS的偏置为10ms。
应理解，上述例子仅为示例而非限定，实际应用中，M组CSI-RS中每组CSI-RS的发送周期与偏置可以为其他时长。
可选地，在本发明实施例，该方法100还包括：
S140，该第一设备向该第二设备发送用于指示该目标CSI-RS的起始发送时刻的指示消息。
具体地，该指示消息还可以包括用于指示该目标CSI-RS的偏置和/或发送周期的信息。应理解，这里提及的该目标CSI-RS的偏置指的是该目标CSI-RS所属的一组CSI-RS的偏置，该目标CSI-RS的发送周期指的是该目标CSI-RS所属的一组CSI-RS的发送周期。
例如，该目标CSI-RS为M组CSI-RS中的第k组CSI-RS中的一个CSI-RS，则该第一设备向该第二设备发送用于指示该目标CSI-RS的起始发送时刻、该第k组CSI-RS的偏置和发送周期的指示消息。
还应理解，如果该目标CSI-RS相对于第一设备上次占用非授权载波后发送的CSI-RS，发送周期没有变化，只是偏置发生改变(例如图2中所示)，则第一设备只需告知第二设备该目标CSI-RS的起始发送时刻和该目标CSI-RS所在组CSI-RS的偏置。如果该目标CSI-RS相对于第一设备上次占用非授权载波后发送的CSI-RS，偏置没有变化，只是发送周期发生改变(例如图3中所示)，则第一设备只需告知第二设备该目标CSI-RS的起始发送时刻和发送周期。
应理解，在本发明实施例中，并不限定S130与S140的先后顺序。
应理解，在本发明实施例中，第一设备还可以采用隐式的方式向第二设备通知该目标CSI-RS的起始发送时刻、偏置和/或发送周期，本发明实施例对此不作限定。
应理解，为了节省信令开销，也可以由RRC来预配置，例如由RRC预配制M组CSI-RS，每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，RRC将该M组CSI-RS的相关信息(包括但不限于偏置和发送周期)通知给接收端设备(例如UE)，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的 位置进行接收。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。此外，可以由RRC来预配置该M组CSI-RS，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收，即在本发明实施例中，发送端设备可以无需向接收端设备发送用于指示该目标CSI-RS的相关信息的信令，能够节省信令开销。
可选地，本发明实施例还提出一种确定状态信息参考信号CSI-RS的方法，该方法包括：
预配置M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数。
具体地，M组CSI-RS中的每组CSI-RS包括一组在时域上周期发送的CSI-RS，具体地如图2中所示的每一组CSI-RS包括在时域上周期发送的CSI-RS序列。M组CSI-RS中的不同组CSI-RS的发送周期和/或偏置互不相同，换句话说，不同组CSI-RS中的各个CSI-RS的起始发送时刻不完全相同，如图2中所示的第1组CSI-RS中的每个CSI-RS的起始发送时刻与第2组CSI-RS中的每个CSI-RS的起始发送时刻完全不同。
应理解，本发明实施例的执行主体可以为发送端设备例如eNB，也可以为RRC，本发明实施例对此不作限定。
还应理解，在预配置了该M组CSI-RS之后，会向发送端设备和接收端设备通知该M组CSI-RS。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
具体如图2所示，这里不再赘述。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
具体如图3所示，这里不再赘述。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发 送周期不同、偏置不同。
具体地，例如在图2中，3组CSI-RS的发送周期也互不相同，例如第1组CSI-RS的发送周期为20ms，第2组CSI-RS的发送周期为15ms，第3组CSI-RS的发送周期为25ms。
再例如，在图3中，3组CSI-RS的偏置也互不相同，例如第1组CSI-RS的偏置为1ms，第2组CSI-RS的偏置为3ms，第3组CSI-RS的偏置为10ms。
应理解，上述例子仅为示例而非限定，实际应用中，M组CSI-RS中每组CSI-RS的发送周期与偏置可以为其他时长。
上文结合图1至图3从发送端设备(第一设备)的角度描述了根据本发明实施例提供的传输信道状态信息参考信号的方法，下面从接收端设备(第二设备)的角度描述根据本发明实施例提供的传输信道状态信息参考信号的方法。
图4示出了根据本发明实施例提供的传输信道状态信息参考信号的方法200的示意性流程图。
S210，第二设备确定用于接收第一设备发送的目标CSI-RS的接收位置，该目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，该M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
S220，该第二设备基于该第一设备获取的非授权载波，在该接收位置接收该目标CSI-RS。
应理解，在本发明实施例中，M组CSI-RS中的每组CSI-RS包括一组在时域上周期发送的CSI-RS，具体地如图2中所示的每一组CSI-RS包括在时域上周期发送的CSI-RS序列。M组CSI-RS中的不同组CSI-RS的发送周期和/或偏置互不相同，换句话说，不同组CSI-RS中的各个CSI-RS的起始发送时刻不完全相同，如图2中所示的第1组CSI-RS中的每个CSI-RS的起始发送时刻与第2组CSI-RS中的每个CSI-RS的起始发送时刻完全不同。
还应理解，该目标CSI-RS为M组CSI-RS中的其中一组周期发送的CSI-RS中的一个CSI-RS，且该目标CS-RS的起始发送时刻在第一设备在非授权载波上允许开始发送数据的时刻(记为第一时刻)之后，或者该目标CS-RS的起始发送时刻与该第一时刻为同一时刻，具体地，例如第一设备获取非授权载波，且在该非授权载波上允许开始发送数据的时刻为图2中所示 的时刻tA，可以将图2中所示的第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS，也可以将第3组CSI-RS中的第3个CSI-RS作为该目标CSI-RS，或者也可以将第1组CSI-RS的第4个CSI-RS作为该目标CSI-RS，本发明实施例对此不作限定。
具体地，假设在S120中将第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS，则第一设备基于获取的非授权载波，在该目标CSI-RS的起始发送时刻(例如图2中所示的时刻t1)向第二设备发送该目标CSI-RS。
由上可知，在本发明实施例中，预配置了M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备获取非授权载波后，从该M组CSI-RS中确定目标CSI-RS，在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。换句话说，在本发明实施例中，可以从多个CSI-RS发送位置中选择一个目标位置向接收端设备发送CSI-RS，相比于现有技术中的周期性传输CSI-RS，能够较为灵活地实现向接收端设备发送CSI-RS。
还应理解，在第一设备向第二设备发送该目标CSI-RS之后，继续基于该目标CSI-RS的发送周期，在相应的位置(时刻)向第二设备发送CSI-RS，其中该目标CSI-RS的发送周期指的是该目标CSI-RS所属的一组CSI-RS的发送周期，具体地，还以将图2中所示的第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS为例，第一设备在该目标CSI-RS的起始发送时刻t1向第二设备发送该目标CSI-RS之后，继续基于该第2组CSI-RS的后续CSI-RS的起始发送时刻，向第二设备发送CSI-RS。换句话说，在本发明实施例中，从目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS开始，一直到释放信道，第一设备依然是采用周期性传输方式向第二设备传输CSI-RS的，相比于现有技术中的非周期性传输CSI-RS，无需较大的信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的方法，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
可选地，在本发明实施例中，该目标CSI-RS为该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
因此，在本发明实施例中，发送端设备占用非授权载波后，从预配置的M组CSI-RS中确定目标CSI-RS，该目标CSI-RS的起始发送时刻与在该非 授权载波上允许开始发送数据的时刻之间的时间间隔最短，发送端设备在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。相比于现有技术，能够有效地缩短在非授权载波上允许开始发送数据的时刻与向接收端设备发送CSI-RS的起始发送时刻之间的间隔，从而能够实现及时向接收端设备发送CSI-RS。例如发送端设备为基站，接收端设备为UE，基站根据本发明实施例提供的方法向UE发送CSI-RS，从而使得UE能够及时获取信道状态信息，从而能够及时上报信道状态给基站，使得基站根据信道状态报告作相应的调度决策。
应理解，第二设备确定了一个CSI-RS的接收位置，然后根据获知的发送周期，就可以在相应的位置上接收CSI-RS了。具体地，第二设备可以通过盲检测或者接收发送端的第一设备发送的指示消息，获知该CSI-RS的接收位置。
可选地，在本发明实施例中，S210该第二设备确定用于接收第一设备发送的目标CSI-RS的接收位置，包括：
该第二设备通过盲检测，或者通过接收该第一设备发送的用于指示该接收位置的指示消息，确定该接收位置。
具体地，该第二设备接收该第一设备发送的用于指示该目标CSI-RS的起始发送时刻、偏置和/或发送周期的指示消息，该第二设备根据该指示消息，确定接收该目标CSI-RS的接收位置。
也可以由RRC来预配置，例如由RRC预配制M组CSI-RS，每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，RRC将该M组CSI-RS的相关信息(包括但不限定偏置和发送周期)通知给接收端设备(例如UE)，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收。
可选地，在本发明实施例，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
具体地，如图2所示，预配置3组CSI-RS，每组CSI-RS的发送周期均为20ms，第1组CSI-RS的偏置为0ms，第2组CSI-RS的偏置为5ms，第3组CSI-RS的偏置为10ms。
可选地，在本发明实施例，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
具体地，如图3所示，预配置3组CSI-RS，每组CSI-RS的偏置均为0，第1组CSI-RS的发送周期为11ms，第2组CSI-RS的发送周期为8ms，第3组CSI-RS的发送周期为5ms。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
具体地，例如图2中的3组CSI-RS的发送周期互不相同，再例如图3所示的3组CSI-RS的偏置互不相同。
对M组CSI-RS的具体描述详见上文描述，为了简洁，这里不再赘述。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。此外，发送端设备可以无需向接收端设备发送用于指示该目标CSI-RS的相关信息的信令，可以由RRC来预配置该M组CSI-RS，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收，能够节省信令开销。
还应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
上文结合图1至图4描述了根据本发明实施例提供的传输信道状态信息参考信号的方法，下面结合图5至8描述根据本发明实施例提供的传输信道状态信息参考信号的设备。
图5示出了根据本发明实施例提供的传输信道状态信息参考信号的设备300的示意性框图。该设备300包括：
获取模块310，用于获取非授权载波；
确定模块320，用于从预配置的M组CSI-RS中，确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
发送模块330，用于基于该获取模块获取的该非授权载波，在该确定模块确定的该目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS。
在本发明实施例中，预配置了M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备获取非授权载波后，从该M组CSI-RS中确定目标CSI-RS，在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。换句话说，在本发明实施例中，可以从多个CSI-RS发送位置中选择一个目标位置向接收端设备发送CSI-RS，相比于现有技术中的周期性传输CSI-RS，能够较为灵活地实现向接收端设备发送CSI-RS。
还应理解，在第一设备向第二设备发送该目标CSI-RS之后，继续基于该目标CSI-RS的发送周期，在相应的位置(时刻)向第二设备发送CSI-RS，其中该目标CSI-RS的发送周期指的是该目标CSI-RS所属的一组CSI-RS的发送周期，具体地，还以将图2中所示的第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS为例，第一设备在该目标CSI-RS的起始发送时刻t1向第二设备发送该目标CSI-RS之后，继续基于该第2组CSI-RS的后续CSI-RS的起始发送时刻，向第二设备发送CSI-RS。换句话说，在本发明实施例中，从目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS开始，一直到释放信道，第一设备依然是采用周期性传输方式向第二设备传输CSI-RS的，相比于现有技术中的非周期性传输CSI-RS，无需较大的信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的设备，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
可选地，在本发明实施例中，该确定模块具体用于，将该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为该目标CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
在本发明实施例中，占用非授权载波后，从预配置的M组CSI-RS中确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，在该M组CSI-RS中，该目标CSI-RS的起始发送时刻与在非授权载波上允许开始发送数据的时刻之间的时间间隔最短，在目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。相比于现有技术，能够有效地缩短在非授权载波上允许开始发送数据的时刻与开始向接收端设备发送CSI-RS的时刻之间的间隔，从而能够实现及时向接收端设备发送CSI-RS。
应理解，在本发明实施例中，当占用到非授权载波之后，在该非授权载 波上还是采用周期性传输方式传输CSI-RS的，因此无需现有的非周期性传输方案中所需的较大信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的方法，能够实现及时向接收端设备发送CSI-RS，同时也能够避免较大信令开销。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
可选地，在本发明实施例中，该发送模块还用于，向该第二设备发送用于指示该目标CSI-RS的起始发送时刻的指示消息。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。此外，可以由RRC来预配置该M组CSI-RS，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收，即在本发明实施例中，发送端设备可以无需向接收端设备发送用于指示该目标CSI-RS的相关信息的信令，能够节省信令开销。
应理解，本发明实施例提供的设备300可对应于本发明实施例的传输信道状态信息参考信号的方法中的第一设备，并且设备300中的各个模块的上述和其它操作和/或功能分别为了实现图1至图4中的各个方法的相应流程，为了简洁，在此不再赘述。
图6示出了根据本发明实施例提供的传输信道状态信息参考信号的设备400的示意性框图。该设备400包括：
确定模块410，用于确定用于接收第一设备发送的目标CSI-RS的接收位置，该目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，该M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
接收模块420，用于基于该第一设备获取的非授权载波，在该确定模块确定的该接收位置接收该目标CSI-RS。
在本发明实施例中，预配置了M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备获取非授权载波后，从该M组CSI-RS中确定目标CSI-RS，在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。换句话说，在本发明实施例中，可以从多个CSI-RS发送位置中选择一个目标位置向接收端设备发送CSI-RS，相比于现有技术中的周期性传输CSI-RS，能够较为灵活地实现向接收端设备发送CSI-RS。
还应理解，在本发明实施例中，从目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS开始，一直到释放信道，第一设备依然是采用周期性传输方式向第二设备传输CSI-RS的，相比于现有技术中的非周期性传输CSI-RS，无需较大的信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的设备，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
可选地，作为一个实施例，该目标CSI-RS为该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
可选地，在本发明实施例中，该确定模块具体用于，通过盲检测，或者 通过接收该第一设备发送的用于指示该接收位置的指示消息，确定该接收位置。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。此外，可以由RRC来预配置该M组CSI-RS，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收，即在本发明实施例中，发送端设备可以无需向接收端设备发送用于指示该目标CSI-RS的相关信息的信令，能够节省信令开销。
应理解，本发明实施例提供的设备400可对应于本发明实施例的传输信道状态信息参考信号的方法中的第二设备，并且设备400中的各个模块的上述和其它操作和/或功能分别为了实现图1至图4中的各个方法的相应流程，为了简洁，在此不再赘述。
图7示出了根据本发明实施例提供的传输信道状态信息参考信号的设备500的示意性框图。该设备500包括：处理器510、存储器520、总线系统530、接收器540和发送器550。其中，处理器510、存储器520、接收器540和发送器550通过总线系统530相连，该存储器520用于存储指令，该处理器510用于执行该存储器520存储的指令，以控制接收器540接收信号，并控制发送器550发送信号。其中，该处理器510用于第一设备获取非授权载波；该第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；发送器550用于，在该目标CSI-RS的起始发送时刻向第二设备发送该目标CSI-RS。
在本发明实施例中，预配置了M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备获取非授权载波后，从该M组CSI-RS中确定目标CSI-RS，在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。换句话说，在本发明实施例中，可以从多个CSI-RS发送位置中选择一个目标位置向接收端设备发送CSI-RS，相比于现有技术中的周期性传输CSI-RS，能够 较为灵活地实现向接收端设备发送CSI-RS。
还应理解，在第一设备向第二设备发送该目标CSI-RS之后，继续基于该目标CSI-RS的发送周期，在相应的位置(时刻)向第二设备发送CSI-RS，其中该目标CSI-RS的发送周期指的是该目标CSI-RS所属的一组CSI-RS的发送周期，具体地，还以将图2中所示的第2组CSI-RS中的第3个CSI-RS作为该目标CSI-RS为例，第一设备在该目标CSI-RS的起始发送时刻t1向第二设备发送该目标CSI-RS之后，继续基于该第2组CSI-RS的后续CSI-RS的起始发送时刻，向第二设备发送CSI-RS。换句话说，在本发明实施例中，从目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS开始，一直到释放信道，第一设备依然是采用周期性传输方式向第二设备传输CSI-RS的，相比于现有技术中的非周期性传输CSI-RS，无需较大的信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的设备，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
可选地，在本发明实施例中，该处理器510具体用于，将该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为该目标CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
在本发明实施例中，占用非授权载波后，从预配置的M组CSI-RS中确定目标CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，在该M组CSI-RS中，该目标CSI-RS的起始发送时刻与在非授权载波上允许开始发送数据的时刻之间的时间间隔最短，在目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。相比于现有技术，能够有效地缩短在非授权载波上允许开始发送数据的时刻与开始向接收端设备发送CSI-RS的时刻之间的间隔，从而能够实现及时向接收端设备发送CSI-RS。
应理解，在本发明实施例中，当占用到非授权载波之后，在该非授权载波上还是采用周期性传输方式传输CSI-RS的，因此无需现有的非周期性传输方案中所需的较大信令开销。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
可选地，在本发明实施例中，发送器550用于该第一设备向该第二设备发送用于指示该目标CSI-RS的起始发送时刻的指示消息。
应理解，在本发明实施例中，该处理器510可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器510还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器520可以包括只读存储器和随机存取存储器，并向处理器510提供指令和数据。存储器520的一部分还可以包括非易失性随机存取存储器。例如，存储器520还可以存储设备类型的信息。
该总线系统530除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统530。
在实现过程中，上述方法的各步骤可以通过处理器510中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器520，处理器510读取存储器520中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。此外，可以由RRC来预配置该M组CSI-RS，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收，即在本发明实施例中，发送端设备可以无需向接收端设备发送用于指示该目标CSI-RS的相关信息的信令，能够节省信令开销。
应理解，本发明实施例提供的设备500可对应于本发明实施例的传输信道状态信息参考信号的方法中的第一设备，也可以对应于根据本发明实施例的设备300，并且设备500中的各个模块的上述和其它操作和/或功能分别为了实现图1至图4中的各个方法的相应流程，为了简洁，在此不再赘述。
图8示出了根据本发明实施例提供的传输信道状态信息参考信号的设备600的示意性框图。该设备600包括：处理器610、存储器620、总线系统630、接收器640和发送器660。其中，处理器610、存储器620、接收器640和发送器650通过总线系统630相连，该存储器620用于存储指令，该处理器610用于执行该存储器620存储的指令，以控制接收器640接收信号，并控制发送器660发送信号。其中，处理器610用于，确定用于接收第一设备发送的目标CSI-RS的接收位置，该目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，该M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；接收器630用于，根据该接收位置，接收该目标CSI-RS。
在本发明实施例中，预配置了M组CSI-RS，该M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，发送端设备获取非授权载波后，从该M组CSI-RS中确定目标CSI-RS，在该目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS。换句话说，在本发明实施例中，可以从多个CSI-RS发送位置中选择一个目标位置向接收端设备发送CSI-RS，相比于现有技术中的周期性传输CSI-RS，能够较为灵活地实现向接收端设备发送CSI-RS。
还应理解，在本发明实施例中，从目标CSI-RS的起始发送时刻向接收端设备发送该目标CSI-RS开始，一直到释放信道，第一设备依然是采用周期性传输方式向第二设备传输CSI-RS的，相比于现有技术中的非周期性传输CSI-RS，无需较大的信令开销。
因此，根据本发明实施例提供的传输信道状态信息参考信号的设备，能够较为灵活地向接收端设备发送CSI-RS，且无需较大信令开销。
可选地，在本发明实施例中，该处理器510具体用于，将该M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为该目标CSI-RS，该第一时刻为该第一设备在该非授权载波上允许开始发送数据的时刻。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS 的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
可选地，在本发明实施例中，该M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
可选地，在本发明实施例中，该处理器610用于，通过盲检测，或者通过接收该第一设备发送的用于指示该接收位置的指示消息，确定该接收位置。
因此，在本发明实施例中，通过预配置多组CSI-RS，且不同组CSI-RS的偏置和/或发送周期互不相同，占用非授权载波后，从多组CSI-RS中选取起始发送时刻距离在该非授权载波上允许开始发送数据的时刻距离最近的目标CSI-RS，然后向接收端设备发送该目标CSI-RS，能够及时向接收端设备发送CSI-RS，换句话说，能够增加CSI-RS的发送机会，从而提高CSI-RS的传输效率。此外，可以由RRC来预配置该M组CSI-RS，接收端通过盲检测，检测到一个有效的CSI-RS后，之后便可以根据已知的发送周期，在相应的位置进行接收，即在本发明实施例中，发送端设备可以无需向接收端设备发送用于指示该目标CSI-RS的相关信息的信令，能够节省信令开销。
应理解，本发明实施例提供的设备600可对应于本发明实施例的传输信道状态信息参考信号的方法中的第二设备，也可以对应于根据本发明实施例的设备500，并且设备600中的各个模块的上述和其它操作和/或功能分别为了实现图1至图4中的各个方法的相应流程，为了简洁，在此不再赘述。
还应理解，本文中涉及的第一、第二以及各种数字编号仅为描述方便进行的区分，并不用来限制本发明实施例的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存 在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质 中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种传输信道状态信息参考信号CSI-RS的方法，其特征在于，包括：
    第一设备获取非授权载波；
    所述第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，所述M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
    所述第一设备基于所述非授权载波，在所述目标CSI-RS的起始发送时刻向第二设备发送所述目标CSI-RS。
  2. 根据权利要求1所述的方法，其特征在于，所述第一设备从预配置的M组CSI-RS中，确定目标CSI-RS，包括：
    所述第一设备将所述M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为所述目标CSI-RS，所述第一时刻为所述第一设备在所述非授权载波上允许开始发送数据的时刻。
  3. 根据权利要求1或2所述的方法，其特征在于，所述M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
  4. 根据权利要求1或2所述的方法，其特征在于，所述M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
  5. 根据权利要求1或2所述的方法，其特征在于，所述M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一设备向所述第二设备发送用于指示所述目标CSI-RS的起始发送时刻的指示消息。
  7. 一种传输信道状态信息参考信号CSI-RS的方法，其特征在于，包括：
    第二设备确定用于接收第一设备发送的目标CSI-RS的接收位置，所述目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，所述M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
    所述第二设备基于所述第一设备获取的非授权载波，在所述接收位置接收所述目标CSI-RS。
  8. 根据权利要求7所述的方法，其特征在于，所述目标CSI-RS为所述 M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS，所述第一时刻为所述第一设备在所述非授权载波上允许开始发送数据的时刻。
  9. 根据权利要求7或8所述的方法，其特征在于，所述M组CSI-RS中的不同组CSI-RS的发送周期相同、偏置不同。
  10. 根据权利要求7或8所述的方法，其特征在于，所述M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置相同。
  11. 根据权利要求7或8所述的方法，其特征在于，所述M组CSI-RS中的不同组CSI-RS的发送周期不同、偏置不同。
  12. 根据权利要求7至11中任一项所述的方法，其特征在于，所述第二设备确定用于接收第一设备发送的目标CSI-RS的接收位置，包括：
    所述第二设备通过盲检测，或者通过接收所述第一设备发送的用于指示所述接收位置的指示消息，确定所述接收位置。
  13. 一种传输信道状态信息参考信号CSI-RS的设备，其特征在于，包括：
    获取模块，用于获取非授权载波；
    确定模块，用于从预配置的M组CSI-RS中，确定目标CSI-RS，所述M组CSI-RS中的每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
    发送模块用于，基于所述获取模块获取的所述非授权载波，在所述确定模块确定的所述目标CSI-RS的起始发送时刻向第二设备发送所述目标CSI-RS。
  14. 根据权利要求13所述的设备，其特征在于，所述确定模块具体用于，将所述M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS确定为所述目标CSI-RS，所述第一时刻为所述第一设备在所述非授权载波上允许开始发送数据的时刻。
  15. 根据权利要求13或14所述的设备，其特征在于，所述发送模块还用于，向所述第二设备发送用于指示所述目标CSI-RS的起始发送时刻的指示消息。
  16. 一种传输信道状态信息参考信号CSI-RS的设备，其特征在于，包括：
    确定模块，用于确定用于接收第一设备发送的目标CSI-RS的接收位置， 所述目标CSI-RS为预配置的M组CSI-RS中的一个CSI-RS，所述M组CSI-RS中每组CSI-RS在时域上周期发送，且不同组CSI-RS的发送周期和/或偏置互不相同，M为大于1的整数；
    接收模块，用于基于所述第一设备获取的非授权载波，在所述确定模块确定的所述接收位置接收所述目标CSI-RS。
  17. 根据权利要求16所述的设备，其特征在于，所述目标CSI-RS为所述M组CSI-RS中起始发送时刻距离第一时刻最近的一个CSI-RS，所述第一时刻为所述第一设备在所述非授权载波上允许开始发送数据的时刻。
  18. 根据权利要求16或17所述的设备，其特征在于，所述确定模块具体用于，通过盲检测，或者通过接收所述第一设备发送的用于指示所述接收位置的指示消息，确定所述接收位置。
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