WO2017166303A1 - 一种传输信道状态信息参考信号的方法及装置 - Google Patents
一种传输信道状态信息参考信号的方法及装置 Download PDFInfo
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- WO2017166303A1 WO2017166303A1 PCT/CN2016/078355 CN2016078355W WO2017166303A1 WO 2017166303 A1 WO2017166303 A1 WO 2017166303A1 CN 2016078355 W CN2016078355 W CN 2016078355W WO 2017166303 A1 WO2017166303 A1 WO 2017166303A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a channel state information reference signal (CSI-RS).
- CSI-RS channel state information reference signal
- the array gain is obtained by using Beamforming (BF) technology.
- BF Beamforming
- the beamforming CSI-RS is also defined. Beamforming is performed on the CSI-RS, and the beamformed CSI-RS is transmitted to the User Equipment (UE) in the cell.
- UE User Equipment
- a CSI-RS resource consists of four CSI-RS ports as an example. As shown, as the period T 2 to the UE periodically detecting an optimal K CSI-RS resource parts CSI-RS resource feedback to the base station, to the cycle T 3 is periodically measured CSI to Base station feedback, where T 2 ⁇ T 3 ⁇ T 1 .
- the UE after determining the optimal CSI-RS resource by the nth (n is a positive integer) times, the UE only needs to determine the nth time before determining the optimal CSI-RS resource at the n+1th time.
- the base station T 1 is still in cycle periodically send beamformed parts K CSI-RS, CSI-RS resulting in a waste of resources.
- Embodiments of the present invention provide a method and apparatus for transmitting a CSI-RS to improve utilization of CSI-RS resources.
- the first aspect provides a method for transmitting a CSI-RS, including: the base station sends a first CSI-RS to a UE on a first CSI-RS resource at a first transmission time point; the first CSI-RS resource is a K CSI -RS resources, K parts of CSI-RS resources include M CSI-RS ports, K and M are integers greater than 1; or, the first CSI-RS resource is N CSI-RS ports, and N is an integer greater than 1.
- the base station receives the first CSI sent by the UE, where the first CSI is the CSI measured by the UE according to the first CSI-RS, and when the first CSI-RS resource is the K CSI-RS resource, the first CSI includes the target CRI and the PMI.
- the first CSI includes a target CRI, and the target CRI is one of K CRIs of K parts of CSI-RS resources; when the first CSI-RS resource is N CSI-RS ports, the first CSI includes a PMI; A CSI determines a second CSI-RS resource; the base station sends a second CSI-RS to the UE on the second CSI-RS resource at the second transmission time point, where the second CSI-RS resource includes X CSI-RS ports, and second The transmission time point is after the first transmission time point.
- X is an integer greater than or equal to 1 and less than M
- the first CSI-RS resource is N CSI-RSs.
- X is greater than the port An integer equal to 1.
- the UE measures the first CSI according to the first CSI-RS and feeds back to the base station, and the base station according to the A CSI determines a second CSI-RS resource, and sends a second CSI-RS to the UE on the second CSI-RS resource, where the number of CSI-RS ports included in the second CSI-RS resource is less than K CSI-RS resources included
- the base station does not need to transmit the second CSI-RS on too many ports. Therefore, CSI-RS resources can be saved.
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the base station when the first CSI-RS resource is a K-CSI-RS resource, and the first CSI includes the target CRI, the base station according to the Determining, by the CSI, the second CSI-RS resource, the determining, by the base station, the second CSI-RS resource according to the correspondence between the K CRIs of the K CSI-RS resources and the R group resources in the resource set, where R is an integer greater than 1;
- the base station determines the second CSI-RS resource according to the first CSI, where the base station determines the second according to the correspondence between the value of the PMI and the R group resource in the resource set.
- CSI-RS resource, R is an integer greater than one.
- the base station sends the first CSI-RS and the second in one CSI process.
- the CSI-RS the base station periodically sends the first CSI-RS to the UE on the first CSI-RS resource in a first transmission period, where the first transmission time point is the start time of a first transmission period, During the first transmission period, the base station periodically sends a second CSI-RS to the UE on the second CSI-RS resource in a second transmission period, and the second transmission time point is any one of the first transmission periods.
- the start time of the second transmission cycle is the first transmission period.
- the base station sends the first CSI-RS and the second in one CSI process.
- the CSI-RS the base station periodically sends the first CSI-RS to the UE on the first CSI-RS resource in a first transmission period, where the first transmission time point is the start time of a first transmission period, During the first sending period, the base station sends the second CSI-RS to the UE on the second CSI-RS resource at the second sending time point, including: determining, by the base station, whether the second CSI-RS resource is at the second sending time point.
- the time point or the third transmission time point is between the first transmission time point and the second transmission time point, and the second transmission time point is located in the first transmission period.
- the base station determines that the PDSCH needs to be sent to the UE at the second transmission time point In the case of data, the base station transmits PDSCH data to the UE on the idle CSI-RS resource in the resource set at the second transmission time point.
- the idle CSI-RS resource in the resource set refers to a CSI-RS resource that is not used to send the second CSI-RS in the resource set, and sends the PDSCH data by using the idle CSI-RS resource in the resource set.
- the utilization of CSI-RS resources in the resource set can be improved.
- the base station sends the indication information to the UE at the second sending time point, where the indication information is used to indicate that the PDSCH data is used in the resource set.
- the CSI-RS resource indicates that the information is carried in the PDCCH.
- the resource set is shared by multiple UEs.
- the resource set is shared by a plurality of UEs, it is not necessary to configure one resource set for each UE, and therefore, resource utilization can be improved.
- the base station sends the indication information to the UE at the second sending time point, including: the base station is on the common control channel at the second sending time point.
- a plurality of UEs transmit indication information.
- the resource set is shared by multiple UEs, it is sent separately for each UE.
- the indication information is sent to the multiple UEs on the common control channel, which can reduce the signaling overhead.
- the method further includes: the base station sends configuration information to the UE, where the configuration information includes a location of the resource in the resource set, and the first CSI The location of the RS resource, the first transmission period, and the second transmission period.
- a second aspect provides a method for transmitting a CSI-RS, where the UE receives a first CSI-RS sent by a base station on a first CSI-RS resource at a first receiving time point; the first CSI-RS resource is a K-component.
- the CSI-RS resource includes K CSI-RS ports, and K and M are integers greater than 1.
- the first CSI-RS resource is N CSI-RS ports, and N is greater than 1.
- the UE measures the first CSI according to the first CSI-RS; when the first CSI-RS resource is the K CSI-RS resource, the first CSI includes the target CRI and the PMI or the first CSI includes the target CRI, and the target CRI is K One of the K CRIs of the CSI-RS resource; when the first CSI-RS resource is N CSI-RS ports, the first CSI includes the PMI; the UE sends the first CSI to the base station; and the UE is at the second receiving time point Receiving a second CSI-RS that is sent by the base station on the second CSI-RS resource, where the second CSI-RS resource is a resource that is sent by the base station according to the first CSI, and the second CSI-RS resource includes the X CSI-RS port, the second receiving time point is after the first receiving time point, when the first CSI-RS resource is K parts of CSI-RS resources, X is an integer greater than or equal to 1 less than M, when the first CSI-RS
- the UE after receiving the first CSI-RS sent by the base station on the first CSI-RS resource at the first transmission time point, the UE measures the first CSI according to the first CSI-RS and feeds back to the base station.
- the base station determines the second CSI-RS resource according to the first CSI, and sends the second CSI-RS to the UE on the second CSI-RS resource, where the number of CSI-RS ports included in the second CSI-RS resource is less than K CSI- CSI-RS port included in the RS resource
- the base station does not need to transmit the second CSI-RS on too many ports, thereby saving CSI -RS resources.
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the UE receives the first CSI-RS and the second CSI-RS in one CSI process, where the UE is first The receiving period is a period, the first receiving CSI-RS sent by the base station on the first CSI-RS resource, and the first receiving time point is a starting time of a first receiving period, in the first receiving period, The UE periodically receives the second CSI-RS sent by the base station on the second CSI-RS resource by using the second receiving period as a period, and the second receiving time point is any second receiving period in the first receiving period. Start time.
- the UE receives the first CSI-RS and the second CSI-RS in one CSI process, and the UE is first The receiving period is a period, the first receiving CSI-RS sent by the base station on the first CSI-RS resource, and the first receiving time point is a starting time of a first receiving period, in the first receiving period,
- the UE measures the second CSI according to the second CSI-RS, where the UE receives the trigger information sent by the base station at the third receiving time point, where the third receiving time point is the second receiving time point or the third receiving time point is at the first receiving time.
- the second receiving time point is located in the first receiving period; the UE acquires the second CSI-RS triggered by the triggering information, and measures the second CSI according to the second CSI-RS.
- the method further includes: the UE receiving the base station at the second receiving time point The indication information sent, indicating that the information is carried in the PDCCH The UE determines a CSI-RS resource for transmitting PDSCH data in the resource set according to the indication information; the UE acquires PDSCH data on the CSI-RS resource used for transmitting the PDSCH data in the resource set.
- the base station sends the PDSCH data in the idle CSI-RS resource in the resource set, and the idle CSI-RS resource in the resource set refers to the CSI-RS resource in the resource set that is not used to send the second CSI-RS. Transmitting PDSCH data on idle CSI-RS resources in the resource set can improve the utilization of CSI-RS resources in the resource set.
- the resource set is shared by multiple UEs.
- the resource set is shared by a plurality of UEs, it is not necessary to configure one resource set for each UE, and therefore, resource utilization can be improved.
- the UE receives the indication information sent by the base station at the second receiving time point, including: the UE is in the common control channel at the second receiving time point. Receiving indication information sent by the base station.
- the signaling overhead is reduced by transmitting the indication information to the plurality of UEs on the common control channel, as compared to separately transmitting the indication information for each UE.
- the UE receives the configuration information sent by the base station, and the UE determines, according to the configuration information, the location of the resource in the resource set, and the first CSI-RS resource.
- the first transmission period is a period in which the base station sends the first CSI-RS to the UE
- the second transmission period is that the base station sends the second CSI to the UE in a first transmission period. The cycle of the RS.
- a third aspect provides a base station, including: a sending unit, configured to send in a first Sending a first CSI-RS to the user equipment UE on the first CSI-RS resource; the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, K And M is an integer greater than 1.
- the first CSI-RS resource is N CSI-RS ports, and N is an integer greater than 1.
- the receiving unit is configured to receive the first CSI sent by the UE, where the first CSI is the UE.
- X is an integer greater than or equal to 1 and less than M.
- X is greater than An integer equal to 1.
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the determining unit when the first CSI-RS resource is a K-CSI-RS resource, and the first CSI includes the target CRI, the determining unit, Specifically, the second CSI-RS resource is determined according to the correspondence between the K CRIs of the K-CSI-RS resources and the R-group resources in the resource set, where R is an integer greater than 1; when the first CSI-RS resources are N When the CSI-RS port is used, the determining unit is specifically configured to determine the second CSI-RS resource according to the correspondence between the value of the PMI and the R group resource in the resource set, where R is an integer greater than 1.
- the sending unit sends the first CSI-RS and the second CSI-RS in one CSI process, where the sending unit is in a cycle of the first sending period, and periodically Sending a first CSI-RS to the UE on a CSI-RS resource, where the first transmission time point is a start time of a first transmission period, and in the first transmission period, the sending unit uses a second transmission period as a period, a period The second CSI-RS is sent to the UE on the second CSI-RS resource, and the second transmission time point is the start time of any one of the second transmission periods in the first transmission period.
- the sending unit sends the first CSI-RS and the first in a CSI process.
- the second CSI-RS the sending unit periodically sends the first CSI-RS to the UE on the first CSI-RS resource, and the first sending time point is the start time of the first sending period.
- the determining unit is further configured to determine whether to send the second CSI-RS to the UE on the second CSI-RS resource at the second sending time point; if yes, the sending unit is at the third sending time point Transmitting the trigger information to the UE and transmitting the second CSI-RS to the UE on the second CSI-RS resource at the second sending time point, where the trigger information is used to trigger the UE to measure the second CSI according to the second CSI-RS, the third sending time The point is the second transmission time point or the third transmission time point is between the first transmission time point and the second transmission time point, and the second transmission time point is located in the first transmission period.
- the transmitting unit when the determining unit determines that the UE needs to be sent to the UE at the second sending time point In the case of the PDSCH data, the transmitting unit is further configured to send the PDSCH data to the UE on the idle CSI-RS resource in the resource set at the second transmission time point.
- the idle CSI-RS resource in the resource set refers to a CSI-RS resource in the resource set that is not used to send the second CSI-RS, and is idle in the resource set. Transmitting PDSCH data on the CSI-RS resource can improve the utilization of CSI-RS resources in the resource set.
- the sending unit is further configured to: send, by the second sending time point, indication information to the UE, where the indication information is used to indicate the resource set The CSI-RS resource used to transmit the PDSCH data, the indication information is carried in the PDCCH.
- the resource set is shared by multiple UEs.
- the resource set is shared by a plurality of UEs, it is not necessary to configure one resource set for each UE, and therefore, resource utilization can be improved.
- the sending unit is configured to: send the indication information to the multiple UEs on the common control channel at the second sending time point.
- the signaling overhead is reduced by transmitting the indication information to the plurality of UEs on the common control channel, as compared to separately transmitting the indication information for each UE.
- the sending unit is further configured to: send configuration information to the UE, where the configuration information includes a location of the resource in the resource set, and the first The location of the CSI-RS resource, the first transmission period, and the second transmission period.
- a UE including: a receiving unit, configured to receive, at a first receiving time point, a first CSI-RS sent by a base station on a first CSI-RS resource; the first CSI-RS resource is a K CSI -RS resources, K parts of CSI-RS resources include M CSI-RS ports, K and M are integers greater than 1; or, the first CSI-RS resources are N CSI-RS a port, where N is an integer greater than 1, a measuring unit, configured to measure a first CSI according to the first CSI-RS; and when the first CSI-RS resource is a K-CSI-RS resource, the first CSI includes a target CRI and a PMI or The first CSI includes a target CRI, and the target CRI is one of K CRIs of K CSI-RS resources; when the first CSI-RS resource is N CSI-RS ports, the first CSI includes a PMI; The first CSI is sent to the base station, and the receiving unit
- the second CSI-RS resource includes X CSI-RS ports, the second receiving time point is after the first receiving time point, and when the first CSI-RS resource is K parts CSI-
- X is an integer greater than or equal to 1 and less than M.
- the measuring unit is further used according to the second CSI-RS. The second CSI is measured.
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the receiving unit receives the first CSI-RS and the second CSI-RS in one CSI process, and the receiving unit
- the first receiving period is a period
- the first receiving time point is a starting time of a first receiving period, in the first receiving period
- the receiving unit periodically receives the second CSI-RS sent by the base station on the second CSI-RS resource
- the second receiving time point is any second receiving in the first receiving period. The start time of the cycle.
- the receiving unit receives the first CSI-RS and the CSI process in a CSI process.
- a second CSI-RS the receiving unit periodically receives the first CSI-RS sent by the base station on the first CSI-RS resource, and the first receiving time point is a first receiving period.
- the receiving unit receives the trigger information sent by the base station at the third receiving time point, where the third receiving time point is the second receiving time point or the third receiving time point is at the first receiving time point and Between the second receiving time points, the second receiving time point is located in the first receiving period; the measuring unit acquires the second CSI-RS triggered by the triggering information, and measures the second CSI according to the second CSI-RS.
- the receiving unit is further configured to: receive at the second receiving time point The indication information sent by the base station, the indication information is carried in the PDCCH; the UE further includes a determining unit, configured to determine, according to the indication information, a CSI-RS resource used for transmitting the PDSCH data in the resource set; the UE further includes an acquiring unit, and acquiring And a unit, configured to acquire PDSCH data on a CSI-RS resource used for transmitting PDSCH data in the resource set.
- the base station sends the PDSCH data in the idle CSI-RS resource in the resource set, and the idle CSI-RS resource in the resource set refers to the CSI-RS resource in the resource set that is not used to send the second CSI-RS. Transmitting PDSCH data on idle CSI-RS resources in the resource set can improve the utilization of CSI-RS resources in the resource set.
- the resource set is shared by multiple UEs.
- the resource set is shared by a plurality of UEs, it is not necessary to configure one resource set for each UE, and therefore, resource utilization can be improved.
- the receiving unit is configured to: receive the indication information sent by the base station on the common control channel at the second receiving time point.
- the resource set is shared by multiple UEs, it is sent separately for each UE.
- the indication information is sent to the multiple UEs on the common control channel, which can reduce the signaling overhead.
- the receiving unit is further configured to: receive configuration information sent by the base station, and the determining unit is further configured to determine, according to the configuration information, the resource set The location of the resource, the location of the first CSI-RS resource, the first sending period, and the second sending period, where the first sending period is a period in which the base station sends the first CSI-RS to the UE, and the second sending period is in a first The period during which the base station transmits the second CSI-RS to the UE during the transmission period.
- the fifth aspect provides a base station, including: a transmitter, a receiver, a memory, and a processor, where the transmitter sends the first CSI to the user equipment UE on the first CSI-RS resource at the first sending time point.
- the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, where K and M are integers greater than one; or, the first CSI-RS resource is N.
- a CSI-RS port where N is an integer greater than 1; a receiver, configured to receive a first CSI sent by the UE, where the first CSI is a CSI measured by the UE according to the first CSI-RS; and when the first CSI-RS resource is When K shares CSI-RS resources, the first CSI includes the target CRI and the PMI or the first CSI includes the target CRI, and the target CRI is one of the K CRIs of the K CSI-RS resources; when the first CSI-RS resource is N a CSI-RS port, the first CSI includes a PMI; the memory is configured to store a code, and the processor performs the following actions according to the code: determining a second CSI-RS resource according to the first CSI; and the transmitter is further configured to use the second sending time The second CSI-RS is sent to the UE on the second CSI-RS resource, where the second CSI-RS resource includes X CSI-RS ports, and the second sending time is at the first sending time.
- X is an integer greater than or equal to 1 and less than M.
- X is greater than or equal to 1. The integer.
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the processor when the first CSI-RS resource is a K-CSI-RS resource, and the first CSI includes the target CRI, the processor, Specifically, the second CSI-RS resource is determined according to the correspondence between the K CRIs of the K CSI-RS resources and the R group resources in the resource set, where R is an integer greater than 1.
- the processor is specifically configured to: determine, according to the correspondence between the value of the PMI and the R group resource in the resource set, the second CSI-RS resource, where R is greater than 1. The integer.
- the transmitter sends the first CSI-RS and the first in a CSI process.
- the second CSI-RS the transmitter sends the first CSI-RS to the UE periodically on the first CSI-RS resource, and the first sending time point is the start time of the first sending period.
- the transmitter periodically sends a second CSI-RS to the UE on the second CSI-RS resource in a second transmission period, where the second transmission time point is the first transmission period. The start time of any second transmission period within.
- the transmitter sends the first CSI-RS and the first in a CSI process.
- the second CSI-RS the transmitter sends the first CSI-RS to the UE periodically on the first CSI-RS resource, and the first sending time point is the start time of the first sending period.
- the processor is further configured to determine whether to send the second CSI-RS to the UE on the second CSI-RS resource at the second sending time point, and if yes, the transmitter sends the second sending time point to
- the UE sends the trigger information and sends a second CSI-RS to the UE on the second CSI-RS resource at the second transmission time point, where the trigger information is used to trigger the UE to measure the second CSI according to the second CSI-RS.
- the third transmission time point is the second transmission time point or the third transmission time point is between the first transmission time point and the second transmission time point, and the second transmission time point is located in the first transmission period.
- the transmitter transmits PDSCH data to the UE on the idle CSI-RS resource in the resource set at the second transmission time point.
- the idle CSI-RS resource in the resource set refers to a CSI-RS resource that is not used to send the second CSI-RS in the resource set, and sends the PDSCH data by using the idle CSI-RS resource in the resource set.
- the utilization of CSI-RS resources in the resource set can be improved.
- the transmitter is further configured to: send, by the second sending time point, indication information to the UE, where the indication information is used to indicate the resource set A CSI-RS resource for transmitting PDSCH data, indicating that the information is carried in the PDCCH.
- the resource set is shared by multiple UEs.
- the resource set is shared by a plurality of UEs, it is not necessary to configure one resource set for each UE, and therefore, resource utilization can be improved.
- the transmitter is specifically configured to: send the indication information to the multiple UEs on the common control channel at the second sending time point.
- the signaling overhead is reduced by transmitting the indication information to the plurality of UEs on the common control channel, as compared to separately transmitting the indication information for each UE.
- the transmitter is further configured to: send configuration information to the UE, where the configuration information includes a location of the resource in the resource set, a location of the first CSI-RS resource, a first sending period, and a second sending period.
- the sixth aspect provides a UE, including: a receiver, a memory, a processor, and a transmitter, where the receiver is configured to receive, at a first receiving time point, a first CSI-RS sent by the base station on the first CSI-RS resource.
- the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, and K and M are integers greater than one; or, the first CSI-RS resource is N CSI-RS port, N is an integer greater than 1; a memory is used to store code, and the processor performs the following actions according to the code: measuring the first CSI according to the first CSI-RS; when the first CSI-RS resource is K parts CSI-RS At the time of the resource, the first CSI includes the target CRI and the PMI or the first CSI includes the target CRI, and the target CRI is one of the K CRIs of the K CSI-RS resources; when the first CSI-RS resource is the N CSI-RS ports
- the first CSI includes a PMI, the transmitter is configured to send the first CSI to the base station, and the receiver is further configured to receive, by the second receiving time point, the second CSI-RS sent by the base station on the second CSI-RS resource, where The
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the receiver receives the first CSI-RS and the second CSI-RS in one CSI process, and the receiver The first receiving period is a period, and the periodic receiving base station is in the first a first CSI-RS sent on a CSI-RS resource, where a first receiving time point is a start time of a first receiving period, and in the first receiving period, the receiver is periodically cycled by a second receiving period. Receiving, by the receiving base station, a second CSI-RS sent on the second CSI-RS resource, where the second receiving time point is a starting time of any one of the second receiving periods in the first receiving period.
- the receiver receives the first CSI-RS and the second CSI-RS in one CSI process
- the receiver The first receiving period is a period, the first receiving CSI-RS sent by the base station on the first CSI-RS resource, and the first receiving time point is a starting time of a first receiving period, in the first receiving period
- the receiver is further configured to: receive the trigger information sent by the base station at the third receiving time point, where the third receiving time point is the second receiving time point or the third receiving time point is at the first receiving time point and the second receiving time point
- the second receiving time point is located in the first receiving period; the processor is configured to acquire the second CSI-RS triggered by the triggering information, and measure the second CSI according to the second CSI-RS.
- the receiver is further configured to: receive the base station at the second receiving time point. And the indication information that is sent in the PDCCH; the processor is further configured to determine, according to the indication information, a CSI-RS resource used for transmitting the PDSCH data in the resource set; the processor is further configured to be used in the resource set
- the PDSCH data is acquired on a CSI-RS resource that transmits PDSCH data.
- the base station sends the PDSCH data in the idle CSI-RS resource in the resource set, and the idle CSI-RS resource in the resource set refers to the CSI-RS resource in the resource set that is not used to send the second CSI-RS. Transmitting PDSCH data on idle CSI-RS resources in the resource set can improve the utilization of CSI-RS resources in the resource set.
- the resource set is shared by multiple UEs.
- the resource set is shared by a plurality of UEs, it is not necessary to configure one resource set for each UE, and therefore, resource utilization can be improved.
- the receiver is configured to: receive the indication information sent by the base station on the common control channel at the second receiving time point.
- the signaling overhead is reduced by transmitting the indication information to the plurality of UEs on the common control channel, as compared to separately transmitting the indication information for each UE.
- the receiver is further configured to receive configuration information sent by the base station
- the processor is further configured to determine, according to the configuration information, the resource set a location of the resource, a location of the first CSI-RS resource, a first sending period, and a second sending period, where the first sending period is a period in which the base station sends the first CSI-RS to the UE, and the second sending period is in a first sending period The period during which the base station transmits the second CSI-RS to the UE.
- FIG. 1 is a schematic diagram of a base station transmitting a CSI-RS in the prior art
- FIG. 2 is a flowchart of a method for transmitting a CSI-RS according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of a K-share CSI-RS resource according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of a resource set according to an embodiment of the present invention.
- FIG. 5 is a flowchart of a method for transmitting a CSI-RS according to an embodiment of the present invention
- FIG. 6 is a schematic diagram of a base station transmitting a CSI-RS according to an embodiment of the present disclosure
- FIG. 7 is a schematic diagram of another base station transmitting a CSI-RS according to an embodiment of the present disclosure.
- FIG. 8 is a flowchart of a method for transmitting a CSI-RS according to an embodiment of the present invention.
- FIG. 9 is a schematic diagram of a base station transmitting a CSI-RS according to an embodiment of the present disclosure.
- FIG. 10 is a schematic diagram of another base station transmitting a CSI-RS according to an embodiment of the present disclosure.
- FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
- FIG. 12 is a schematic structural diagram of still another base station according to an embodiment of the present disclosure.
- FIG. 13 is a schematic structural diagram of a UE according to an embodiment of the present disclosure.
- FIG. 14 is a schematic structural diagram of still another UE according to an embodiment of the present invention.
- the base station periodically transmits K-beamformed CSI-RSs on K CSI-RS resources in a CSI process, and one CSI-RS resource includes at least one CSI-RS port, one copy.
- the CSI-RS resource corresponds to a directional beam.
- the second mode the base station periodically sends a beam-formed CSI-RS on a CSI-RS resource in a CSI process, where the CSI-RS resource includes multiple pairs of CSI-RS ports, and a pair of CSI-
- the RS port corresponds to a directional beam
- each pair of CSI-RS A port in a port is a port formed by weighting a port corresponding to a beam corresponding to a polarization direction antenna.
- the base station periodically sends a beamformed CSI-RS on a CSI-RS resource in a CSI process, where the CSI-RS resource includes at least one CSI-RS port, and the CSI-RS resource corresponds to the CSI-RS resource.
- a beam with directivity is used to send.
- the base station may also send an unbeam-formed CSI-RS to the UE on multiple CSI-RS ports.
- the manner in which the CSI-RS is sent in the embodiment of the present invention is referred to as the third manner of transmitting the CSI-RS. .
- An embodiment of the present invention provides a method for transmitting a CSI-RS. As shown in FIG. 2, the method includes:
- the base station sends the first CSI-RS to the UE on the first CSI-RS resource at the first sending time point.
- the first transmission time point may be any one of the time points, which is not limited in this embodiment of the present invention.
- the first CSI-RS resource may be a K-CSI-RS resource, and one CSI-RS resource includes at least one CSI-RS port.
- the first CSI-RS may be a K-beam shaped CSI- RS, the first CSI-RS resource may also be N CSI-RS ports.
- the first CSI-RS may be an unbeamformed CSI-RS, and both K and N are integers greater than 1.
- the UE receives the first CSI-RS sent by the base station on the first CSI-RS resource at the first receiving time point, and measures the first CSI according to the first CSI-RS.
- the first CSI includes a target CSI-RS resource indicator (CRI-RS Resource Indicator, CRI for short) or the first CSI includes a target CRI and a precoding matrix indication when the first CSI-RS resource is a K-CSI-RS resource.
- CRI CRI Resource Indicator
- PMI Precoding Matrix Indication
- the K-CSI-RS resources are in one-to-one correspondence with the K CRIs.
- the indication may be A1
- the resource indication corresponding to the second CSI-RS resource in the 2 CSI-RS resources may be A2.
- the target CRI may be a CRI of an optimal one of the C-CSI-RS resources of the K-CSI-RS resources obtained by the base station according to the first CSI-RS measurement.
- the UE sends a first CSI to the base station.
- the base station receives the first CSI sent by the UE, and determines the second CSI-RS resource according to the first CSI.
- the second CSI-RS resource includes X CSI-RS ports.
- the K CSI-RS resources include M CSI-RS ports, M is an integer greater than 1, and X is an integer greater than or equal to 1 less than M;
- the CSI-RS resource is N CSI-RS ports, N is an integer greater than 1, and X is an integer greater than or equal to 1.
- X may be an integer less than N or an integer equal to N.
- the second CSI-RS resource is one or more groups of resources in the resource set, and the resource set is a resource set configured by the base station.
- the step 204 may be: the base station receives the first CSI sent by the UE, and determines the second CSI-RS resource in the resource set according to the first CSI.
- the resource set can be shared by multiple UEs, so that the base station does not need to configure a separate resource set for each UE, which can save resources.
- step 204 may be packaged in a specific implementation.
- the base station determines the second CSI-RS resource according to the correspondence between the K CRIs of the K-CSI-RS resources and the R-group resources in the resource set, where R is an integer greater than 1.
- the R group resources in the resource set may also be K shares of CSI-RS resources.
- the first CSI-RS resource is a K-CSI-RS resource
- the first CSI includes the target CRI
- the first CSI may also include the PMI
- the combination of the values of the target CRI and the PMI may be preset in advance.
- the CSI-RS resource in the resource set when the base station needs to determine the second CSI-RS resource, may determine the second CSI according to the correspondence between the combination of the value of the target CRI and the PMI and the CSI-RS resource in the resource set. RS resources.
- the step 204 may include: determining, by the base station, the second according to a correspondence between a value of the PMI and an R group resource in the resource set.
- CSI-RS resource, R is an integer greater than one.
- a preset correspondence may be made between the value of the PMI and the R group resource in the resource set.
- a preset correspondence may be made between the value of the PMI and the R group resource in the resource set.
- the base station sends a second CSI-RS to the UE on the second CSI-RS resource at the second sending time point, where the second CSI-RS is a beamformed CSI-RS.
- the second transmission time point is after the first transmission time point.
- the base station sends the multiple CSI-RS resources to the multiple at the second sending time point.
- the UE sends the same second CSI-RS.
- the UE receives the second CSI-RS sent by the base station on the second CSI-RS resource at the second receiving time point, and measures the second CSI according to the second CSI-RS.
- the second CSI may include a Rank Indication (RI), a second PMI (for distinguishing from the PMI mentioned elsewhere herein, referred to herein as a second PMI), and a Channel Quality Indication (referred to as Channel Quality Indication, referred to as CQI) and the rank of the channel (Rank) and the like.
- RI Rank Indication
- second PMI for distinguishing from the PMI mentioned elsewhere herein, referred to herein as a second PMI
- CQI Channel Quality Indication
- the UE may feed back to the base station after detecting the second CSI, and the base station may determine a precoding matrix of the data and a DeModulation Reference Signal (DMRS) according to the second CSI, and a modulation and coding scheme of the data (Modulation and Coding Scheme, referred to as MCS).
- DMRS DeModulation Reference Signal
- MCS Modulation and Coding Scheme
- the base station may send the first CSI-RS and the second CSI-RS in one CSI process, or may configure two CSI processes to send the first CSI-RS and the second CSI-RS respectively.
- the method may further include: when the base station determines, at the second sending time, that the physical downlink shared channel (PDSCH) data needs to be sent to the UE, the base station is in the resource set at the second sending time point.
- the PDSCH data is transmitted to the UE on the idle CSI-RS resource.
- the idle CSI-RS resource in the resource set refers to a CSI-RS resource in the resource set that is not used to transmit the second CSI-RS.
- the method may further include: the base station transmitting the indication information to the UE at the second transmission time point, where the indication information is used to indicate the CSI-RS resource used for transmitting the PDSCH data in the resource set, where the indication information is carried on the physical downlink control channel.
- PDCCH Physical Downlink Control Channel
- the UE receives the indication information sent by the base station at the second receiving time point; the UE determines the use in the resource set according to the indication information.
- the CSI-RS resource for transmitting the PDSCH data the UE acquires the PDSCH data on the CSI-RS resource for transmitting the PDSCH data in the resource set.
- the resource set The idle CSI-RS resource is the resource (3) and the resource (4); when the base station determines that the second CSI-RS is not transmitted in the second CSI-RS resource at the second transmission time point, the idle CSI in the resource set -RS resources are resources (1), resources (2), resources (3), and resources (4).
- the base station needs to indicate the CSI-RS resource of the PDSCH data in the resource set by using the indication information. So that the UE acquires PDSCH data on the CSI-RS resource.
- the resource set is shared by multiple UEs
- the base station may send the indication information on the common control channel, so that the multiple UEs obtain the indication information through the common control channel, and the base station may include the indication information in the downlink control signaling, where In the downlink control signaling, a plurality of bits may be added to indicate resources for transmitting PDSCH data in the resource set corresponding to the current subframe.
- the R bits may be used to indicate the resource for transmitting the PDSCH data in the resource set corresponding to the current subframe, and one bit is used to indicate whether a group of resources in the resource set is Used to transmit PDSCH data.
- the base station may add R bits in the third format (format3) of the downlink control information (DCI) to indicate resources for transmitting the PDSCH in the resource set of the current subframe, and the DCI may be All users in the cell or part of the UE are identified, and the data identified by the UE can be used for the number of PDSCHs. According to the demodulation.
- DCI downlink control information
- the UE measures the first CSI according to the first CSI-RS and feeds back to the base station, and the base station according to the A CSI determines a second CSI-RS resource, and sends a second CSI-RS to the UE on the second CSI-RS resource, where the number of CSI-RS ports included in the second CSI-RS resource is less than K CSI-RS resources included
- the base station does not need to transmit the second CSI-RS on too many ports. Therefore, CSI-RS resources can be saved and the utilization of CSI-RS resources can be improved.
- the embodiment of the present invention further provides a method for transmitting a CSI-RS.
- the embodiment uses the first CSI-RS resource as a K-CSI-RS resource as an example to describe the foregoing method.
- the method is as shown in FIG. include:
- the base station configures a CSI process for the UE.
- the first and second modes of the CSI process are used to transmit a beam-formed CSI-RS, where the first mode sends a CSI-RS, that is, a first CSI-RS, and the second mode sends a CSI-RS. That is, the second CSI-RS.
- the base station sends the first CSI-RS and the second CSI-RS in one CSI process.
- the parameters to be configured include: the first CSI-RS resource and the first sending period in which the base station sends the first CSI-RS.
- the base station sends the first CSI-RS to the UE on the first CSI-RS resource at the first sending time point.
- the base station periodically sends the first CSI-RS to the UE on the first CSI-RS resource in a first transmission period, and the first transmission time point is a start time of a first transmission period.
- a first transmission period may be a T 4, a first transmission time point t 1 or may t 2.
- the first CSI-RS resource is a K-CSI-RS resource
- the K-CSI-RS resource is a time-frequency resource that the base station sends the first CSI-RS
- the K-CSI-RS resource may be preset by the base station.
- the first CSI-RS is a K-beam shaped CSI-RS.
- the UE receives the first CSI-RS sent by the base station on the first CSI-RS resource at the first receiving time point, and measures the target CRI according to the first CSI-RS.
- the UE receives the first CSI-RS and the second CSI-RS in one CSI process, and the UE periodically receives the first CSI-RS sent by the base station on the first CSI-RS resource by using the first receiving period as a period.
- the first receiving time point is a starting time of a first receiving period.
- the target CRI may be the CRI of the optimal CSI-RS resource of the K CSI-RS resources, and the optimal CSI-RS resource of the K CSI-RS resources may be the K CSI-RS.
- the UE sends a target CRI to the base station.
- the base station receives the target CRI sent by the UE, and determines the second CSI-RS resource according to the target CRI.
- the second CSI-RS resource is a time-frequency resource of the second CSI-RS, where the second CSI-RS resource is one or more groups of resources in the resource set, and the base station determines the second CSI-RS resource according to the target CRI.
- the base station determines the second CSI-RS resource according to the target CRI.
- the base station needs to send the second CSI-RS on the second CSI-RS resource, which can be implemented in two ways.
- One implementation manner is that the second CSI-RS is periodically sent. Steps after step 505 are performed 506-507, another implementation manner is a second CSI-RS triggered transmission. In this implementation, steps 505 and 509 are performed after step 505.
- the base station sends a second CSI-RS to the UE on the second CSI-RS resource at the second sending time point, where the second CSI-RS is a beamformed CSI-RS.
- the base station periodically sends the second CSI-RS to the UE on the second CSI-RS resource in the first transmission period to which the first transmission time point belongs, and the second transmission time point.
- the second transmission period may be a T 5, a first transmission time point at t 1, the second transmission time point t 3 or may t 4.
- the base station may send K-beamformed CSI-RSs on K CSI-RS resources at the beginning of each first transmission period, at the beginning of each second transmission period. Transmitting, by the second CSI-RS, a second CSI-RS resource, where the resource location of the second CSI-RS (ie, the second CSI-RS resource) is determined by the base station according to the target CRI fed back by the UE, where The target CRI is a CRI obtained by the UE according to the first CSI-RS measurement transmitted by the base station at the start time of the first transmission period to which the second transmission period belongs.
- the parameters to be configured further include: a second sending period of the second CSI-RS, where the second sending period is sent by the base station in each first sending period.
- the period of the second CSI-RS is a second sending period of the second CSI-RS.
- the method further includes: the base station sending configuration information to the UE, where the configuration information includes a location of the resource in the resource set, a location of the first CSI-RS resource, a first sending period, and a second sending period; Receiving configuration information sent by the base station; the UE determines, according to the configuration information, a location of the resource in the resource set, a location of the first CSI-RS resource, a first sending period, and a second sending period.
- the UE receives the second CSI-RS sent by the base station on the second CSI-RS resource at the second receiving time point, and measures the second CSI according to the second CSI-RS.
- the UE periodically receives the second CSI-RS sent by the base station on the second CSI-RS resource, and the second receiving time point is The start time of any one of the second receiving periods in the first receiving period.
- the base station determines whether the second CSI-RS is sent to the UE on the second CSI-RS resource at the second sending time point. If yes, the base station sends the trigger information to the UE at the third sending time point and is at the second sending time point. Sending a second CSI-RS to the UE on the second CSI-RS resource.
- the triggering information is used to trigger the UE to measure the second CSI according to the second CSI-RS, where the third sending time point is the second sending time point or the third sending time point is between the first sending time point and the second sending time point.
- the second transmission time point is located in the first transmission period to which the first transmission time point belongs.
- the base station may determine whether to send the second CSI-RS by determining whether to transmit data with the UE.
- the base station determines that data needs to be transmitted between the UE, the base station determines that the second CSI-RS needs to be sent, so that the base station according to the UE The second CSI is fed back to determine the channel quality.
- each base station may transmit the start time T 4 in the CSI-RS resource parts K CSI-RS first, second needs to be transmitted at a certain time in the first CSI-RS two second CSI-RS transmitted CSI-RS resources, e.g., CSI-RS transmission in the second second CSI-RS resource t 3.
- K 3
- one CSI-RS resource includes four CSI-RS ports
- the second CSI-RS resource includes four CSI-RS ports as an example.
- the method further includes: the base station sends configuration information to the UE, where The information includes a location of the resource in the resource set, a location of the first CSI-RS resource, and a first sending period; the UE receives configuration information sent by the base station; and the UE determines, according to the configuration information, a location of the resource in the resource set, the first CSI. - The location of the RS resource and the first transmission period.
- the base station may periodically detect whether the second CSI-RS needs to be sent, and if it is determined that the second CSI-RS needs to be sent, The second CSI-RS is in the current subframe (in this case, the second transmission time point is the start time of the current subframe) or the next subframe (in this case, the second transmission time point is the next subframe)
- the second CSI-RS is sent by the base station; the base station may also configure a second transmission period, and the base station determines whether to send the second CSI-RS in the second transmission period before each second transmission period, if it is determined to send the second CSI
- the base station transmits the second CSI-RS at the start time of the second transmission period (ie, the second transmission time point).
- the UE receives the trigger information sent by the base station at the third receiving time point, acquires the second CSI-RS at the second receiving time point, and measures the second CSI according to the second CSI-RS.
- the third receiving time point is the second receiving time point or the third receiving time point is between the first receiving time point and the second receiving time point.
- the method may further include: when the base station determines that the PDSCH data needs to be sent to the UE at the second sending time point, the base station is in the resource set at the second sending time point.
- the PDSCH data is transmitted to the UE on the idle CSI-RS resource.
- the idle CSI-RS resource in the resource set refers to a CSI-RS resource in the resource set that is not used to transmit the second CSI-RS.
- the method may further include: the base station transmitting the indication information to the UE at the second transmission time point, where the indication information is used to indicate the CSI-RS resource used for transmitting the PDSCH data in the resource set, where the indication information is carried in the PDCCH; At the second reception The inter-point receives the indication information sent by the base station; the UE determines the CSI-RS resource used for transmitting the PDSCH data in the resource set according to the indication information; the UE acquires the PDSCH data on the CSI-RS resource used to transmit the PDSCH data in the resource set.
- the base station needs to indicate the CSI-RS resource of the PDSCH data in the resource set by using the indication information. So that the UE acquires PDSCH data on the CSI-RS resource.
- the resource set is shared by multiple UEs
- the base station may send the indication information on the common control channel, so that the multiple UEs obtain the indication information through the common control channel, and the base station may include the indication information in the downlink control signaling, where In the downlink control signaling, a plurality of bits may be added to indicate resources for transmitting PDSCH data in the resource set corresponding to the current subframe.
- the R bits may be used to indicate the resource for transmitting the PDSCH data in the resource set corresponding to the current subframe, and one bit is used to indicate whether a group of resources in the resource set is Used to transmit PDSCH data.
- the base station may add R bits in the DCI format3 to indicate resources for transmitting the PDSCH in the resource set of the current subframe, and the DCI may be recognized by all users or partial UEs in the cell, and the data recognized by the UE may be used.
- the PDSCH data is demodulated.
- the base station in a first transmission period, the base station only determines the second CSI-RS resource once. Therefore, in a first transmission period, the base station may send the indication information only once, and indicate to the UE the entire first.
- the idle CSI-RS resources in the resource set in the transmission period reduce the signaling overhead.
- the UE measures the target CRI according to the first CSI-RS and feeds back to the base station, and the base station according to the target CRI Determining a second CSI-RS resource and transmitting a second CSI-RS to the UE on the second CSI-RS resource without measuring on the K CSI-RS resource, because the CSI included in the second CSI-RS resource
- the number of RS ports is smaller than the number of CSI-RS ports included in the K-CSI-RS resources. Therefore, CSI-RS resources can be saved and the utilization of CSI-RS resources can be improved.
- the embodiment of the present invention further provides a method for transmitting a CSI-RS.
- the embodiment provides an example of the method provided in the first embodiment by using the first CSI-RS resource as the N CSI-RS ports as an example, as shown in FIG. 8 . Show that the method includes:
- the base station configures a CSI process for the UE.
- the CSI-RS is sent in the CSI process by using the third mode and the second mode to send a CSI-RS.
- the third mode sends the unbeamformed CSI-RS, that is, the first CSI-RS, and the second.
- the beam-formed CSI-RS transmitted by the mode is the second CSI-RS.
- the base station sends the first CSI-RS and the second CSI-RS in one CSI process.
- the parameters to be configured include: the first CSI-RS resource and the first sending period in which the base station sends the first CSI-RS.
- the base station sends the first CSI-RS to the UE on the first CSI-RS resource at the first sending time point.
- the base station periodically sends the first CSI-RS to the UE on the first CSI-RS resource in a first transmission period, and the first transmission time point is a start time of a first transmission period.
- a first transmission period may be a T 6
- a first transmission time t 1 may be a point or t 2.
- the first CSI-RS resource is N CSI-RS ports, and the N CSI-RS ports, that is, the base station, transmit time-frequency resources of the first CSI-RS, and the N CSI-RS ports may be preset by the base station.
- the first CSI-RS is an unbeamformed CSI-RS.
- the UE receives the first CSI-RS sent by the base station on the first CSI-RS resource at the first receiving time point, and measures the PMI according to the first CSI-RS.
- the UE receives the first CSI-RS and the second CSI-RS in one CSI process, and the UE periodically receives the first CSI-RS sent by the base station on the first CSI-RS resource by using the first receiving period as a period.
- the first receiving time point is a starting time of a first receiving period.
- PMI1 is used to indicate a beam vector group
- PMI2 is used to indicate a beam vector selected in a beam vector group indicated by PMI1 and a phase compensation factor between two polarization directions.
- the PMI1 can be further divided into PMI1.1 and PMI1.2, PMI1.1 indicates the beam vector group of the vertical dimension, and PMI1.2 indicates the beam vector group of the horizontal dimension, PMI2.
- the PMI measured by the UE includes PMI1 or PMI1.1 or PMI1.2.
- the UE sends a PMI to the base station.
- the base station receives the PMI sent by the UE, and determines the second CSI-RS resource according to the PMI.
- the second CSI-RS resource is a time-frequency resource of the second CSI-RS
- the second CSI-RS resource is one or more groups of resources in the resource set.
- the PMI has a preset correspondence with the resources in the resource set
- the base station may determine the second CSI-RS resource according to the preset correspondence.
- the second CSI-RS resource may be determined according to the beam vector group indicated in PMI1 or PMI1.1 or PMI1.2.
- the PMI1 fed back by the UE indicates that the selected beam vector group is the first beam vector group in the horizontal direction, respectively.
- the second CSI-RS resource associated with the value of the PMI1 may be the first group of resources in the resource set.
- the base station needs to send the second CSI-RS on the second CSI-RS resource, which can be implemented in two ways.
- One implementation manner is that the second CSI-RS is periodically sent.
- steps 806-807 are performed, and another implementation manner is a second CSI-RS triggered transmission. In this implementation manner, steps 805-809 are performed after step 805.
- the base station sends a second CSI-RS to the UE on the second CSI-RS resource at the second sending time point, where the second CSI-RS is a beamformed CSI-RS.
- the base station periodically sends the second CSI-RS to the UE on the second CSI-RS resource in the first transmission period to which the first transmission time point belongs, and the second transmission time point.
- the second transmission may be a period T 7, a first transmission time point at t 1, the second transmission time point t 3 or may t 4.
- the base station may send the first CSI-RS on the N CSI-RS ports at the beginning of each first transmission period, and at the second CSI of the start time of each second transmission period.
- the second CSI-RS is sent on the RS resource, where the resource location (ie, the second CSI-RS resource) for transmitting the second CSI-RS in the second sending period is determined by the base station according to the PMI fed back by the UE, where the PMI is the UE according to the base station.
- the base station when the base station configures the CSI process for the UE, the parameters to be configured are required.
- the number further includes: a second sending period of the second CSI-RS, wherein the second sending period is a period in which the base station sends the second CSI-RS in each first sending period.
- the method further includes: the base station sending configuration information to the UE, where the configuration information includes a location of the resource in the resource set, a location of the first CSI-RS resource, a first sending period, and a second sending period; Receiving configuration information sent by the base station; the UE determines, according to the configuration information, a location of the resource in the resource set, a location of the first CSI-RS resource, a first sending period, and a second sending period.
- the UE receives the second CSI-RS sent by the base station on the second CSI-RS resource at the second receiving time point, and measures the second CSI according to the second CSI-RS.
- the UE periodically receives the second CSI-RS sent by the base station on the second CSI-RS resource, and the second receiving time point is The start time of any one of the second receiving periods in the first receiving period.
- the base station determines whether the second CSI-RS is sent to the UE on the second CSI-RS resource at the second sending time point. If yes, the base station sends the trigger information to the UE at the third sending time point and is at the second sending time point. Sending a second CSI-RS to the UE on the second CSI-RS resource.
- step 508 For a description of the steps, refer to step 508, and details are not described herein again.
- the base station may send the first CSI-RS on N CSI-RS ports at each start time T 6, the second at some point need to be sent in the first CSI-RS two second CSI-RS transmitted CSI-RS resources, e.g., CSI-RS transmission in the second second CSI-RS resource t 3.
- N 16
- the second CSI-RS resource includes four CSI-RS ports as an example.
- the method further includes: the base station sending configuration information to the UE, where the configuration information includes a location of the resource in the resource set, a location of the first CSI-RS resource, and a first sending period; the UE receives configuration information sent by the base station; and the UE determines, according to the configuration information, a location of the resource in the resource set, a location of the first CSI-RS resource, and a first sending period.
- the base station may periodically detect whether the second CSI-RS needs to be sent, and if it is determined that the second CSI-RS needs to be sent, The second CSI-RS is in the current subframe (in this case, the second transmission time point is the start time of the current subframe) or the next subframe (in this case, the second transmission time point is the next subframe)
- the second CSI-RS is sent by the base station; the base station may also configure a second transmission period, and the base station determines whether to send the second CSI-RS in the second transmission period before each second transmission period, if it is determined to send the second CSI
- the base station transmits the second CSI-RS at the start time of the second transmission period (ie, the second transmission time point).
- the UE receives the trigger information sent by the base station at the third receiving time point, acquires the second CSI-RS at the second receiving time point, and measures the second CSI according to the second CSI-RS.
- the third receiving time point is the second receiving time point or the third receiving time point is between the first receiving time point and the second receiving time point.
- the method may further include: when the base station determines that the PDSCH data needs to be sent to the UE at the second sending time point, the base station is in the resource set at the second sending time point.
- the PDSCH data is transmitted to the UE on the idle CSI-RS resource.
- the method may further include: the base station transmitting the indication information to the UE at the second transmission time point, where the indication information is used to indicate the CSI-RS resource used for transmitting the PDSCH data in the resource set, where the indication information is carried in the PDCCH; Receiving, by the second receiving time, the indication information sent by the base station; the UE determining, according to the indication information, the CSI-RS resource used for transmitting the PDSCH data in the resource set; the UE is used in the resource set for transmitting The PDSCH data is acquired on the CSI-RS resource of the PDSCH data.
- the resource set is shared by multiple UEs
- the base station may send the indication information on the common control channel, so that the multiple UEs obtain the indication information through the common control channel, and the base station may include the indication information in the downlink control signaling, where In the downlink control signaling, a plurality of bits may be added to indicate resources for transmitting PDSCH data in the resource set corresponding to the current subframe.
- the base station may send the indication information on the common control channel, so that the multiple UEs obtain the indication information through the common control channel, and the base station may include the indication information in the downlink control signaling, where In the downlink control signaling, a plurality of bits may be added to indicate resources for transmitting PDSCH data in the resource set corresponding to the current subframe.
- the UE measures the PMI according to the first CSI-RS and feeds back to the base station, and the base station determines according to the PMI.
- a second CSI-RS resource and sending a second CSI-RS to the UE on the second CSI-RS resource, where the number of CSI-RS ports included in the second CSI-RS resource is less than N, the base station does not need to be in N
- the second CSI-RS is transmitted on the CSI-RS port, which can save CSI-RS resources.
- the value of N can be set to be less than 16, so that the base station does not need to send the second CSI-RS on the 16 CSI-RS ports, which can also save CSI-RS resources and improve resources.
- the purpose of utilization when transmitting the unbeamformed CSI-RS, it is on 16 CSI-RS ports.
- each receiving period (or receiving time point) in the UE may be according to a period in which the base station sends the first CSI-RS (or a sending time point) and a period in which the second CSI-RS is sent (or a sending time point)
- the configuration is performed by the method in the prior art, and will not be described in detail herein.
- the filled circles in FIG. 1 , FIG. 3 - FIG. 4 , FIG. 6 - FIG. 7 , and FIG. 9 - FIG. 10 in the embodiment of the present invention all refer to CSI-RS ports, and the number of CSI-RS ports included in each resource in the figure. It is also an exemplary drawing, and does not mean that the number of CSI-RS ports included in the specific execution time resource of the method provided by the embodiment of the present invention must be consistent with the drawing.
- the embodiment of the present invention further provides a base station 110.
- the base station 110 includes:
- the sending unit 1101 is configured to send the first CSI-RS to the user equipment UE on the first CSI-RS resource at the first sending time point;
- the receiving unit 1102 is configured to receive first channel state information CSI sent by the UE, where the first CSI is a CSI measured by the UE according to the first CSI-RS.
- a determining unit 1103, configured to determine, according to the first CSI, a second CSI-RS resource
- the sending unit 1101 is further configured to send a second CSI-RS to the UE on the second CSI-RS resource at a second sending time point, where the second CSI-RS resource includes X CSI-RSs a port, the second sending time point is after the first sending time point;
- the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, where the first CSI includes a target CSI-RS resource indication CRI and precoding.
- the matrix indicates that the PMI or the first CSI includes the target CRI, and the target CRI is one of K CRIs of the K shares of CSI-RS resources, and K and M are integers greater than 1, and X is greater than or equal to 1 is an integer less than M;
- the first CSI-RS resource is N CSI-RS ports
- the first CSI includes a PMI
- N is an integer greater than 1
- X is an integer greater than or equal to 1.
- the second CSI-RS resource is a group or groups of resources in a resource set, where the resource set is a resource set configured by the base station.
- the determining unit 1103 is specifically configured to use, according to the K-part CSI- Corresponding relationship between K CRIs of RS resources and R group resources in the resource set determines the second CSI-RS resource, and R is an integer greater than 1;
- the determining unit 1103 is specifically configured to determine, according to a correspondence between a value of the PMI and an R group resource in the resource set, Two CSI-RS resources, R is an integer greater than one.
- the sending unit 1101 sends the first CSI-RS and the second CSI-RS in a CSI process, where the sending unit 1101 periodically cycles with the first sending period. Sending, by the first CSI-RS, the first CSI-RS to the UE, where the first sending time point is a start time of the first sending period, and in the first sending period, the The sending unit 1101 periodically sends the second CSI-RS to the UE on the second CSI-RS resource in a period of the second sending period, where the second sending time point is the first sending period. The start time of any second transmission period within.
- the sending unit 1101 sends the first CSI-RS and the second CSI-RS in a CSI process, where the sending unit 1101 periodically cycles with the first sending period.
- the method is further configured to determine whether to send a second CSI-RS to the UE on the second CSI-RS resource at a second sending time point.
- the sending unit 1101 sends trigger information to the UE at a third sending time point, and sends a second CSI-RS to the UE on the second CSI-RS resource at the second sending time point,
- the triggering information is used to trigger the UE to measure a second CSI according to the second CSI-RS, where the third sending time point is the second sending time point or the third sending time point in the first Between a transmission time point and the second transmission time point, the second transmission time point is located in the first transmission period.
- the sending unit 1101 is further configured to use the second sending time point. Idle in the set of resources The PDSCH data is transmitted to the UE on the CSI-RS resource.
- PDSCH physical downlink shared channel
- the sending unit 1101 is further configured to:
- the indication information is used to indicate a CSI-RS resource for transmitting PDSCH data in the resource set, where the indication information is carried in a physical downlink control channel PDCCH.
- the resource set is shared by multiple UEs.
- the sending unit 1101 is configured to: send the indication information to the multiple UEs on the common control channel at the second sending time point.
- the sending unit 1101 is further configured to: send configuration information to the UE, where the configuration information includes a location of a resource in the resource set, a location of the first CSI-RS resource, and a location The first transmission period and the second transmission period are described.
- the embodiment of the present invention further provides a base station 120.
- the base station 120 includes: a transmitter 1201, a receiver 1202, a memory 1203, and a processor 1204.
- the transmitter 1201, the receiver 1202, the memory 1203, and the processor 1204 are coupled together by a bus system 1205.
- the memory 1203 may include a random access memory, and may also include a non-volatile memory, such as at least A disk storage.
- the bus system 1205 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
- ISA Industry Standard Architecture
- PCI Peripheral Component
- EISA Extended Industry Standard Architecture
- the bus system 1205 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, in Figure 12 It is represented by only one thick line, but does not mean that there is only one bus or one type of bus.
- the transmitter 1201 is configured to send a first CSI-RS to the user equipment UE on the first CSI-RS resource at the first sending time point;
- the receiver 1202 is configured to receive first channel state information (CSI) sent by the UE, where the first CSI is a CSI measured by the UE according to the first CSI-RS;
- CSI channel state information
- the memory 1203 is configured to store a code, and the processor 1204 performs the following actions according to the code: determining a second CSI-RS resource according to the first CSI;
- the transmitter 1201 is further configured to send a second CSI-RS to the UE on the second CSI-RS resource at a second sending time point, where the second CSI-RS resource includes X CSI-RSs a port, the second sending time point is after the first sending time point;
- the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, where the first CSI includes a target CSI-RS resource indication CRI and precoding.
- the matrix indicates that the PMI or the first CSI includes the target CRI, and the target CRI is one of K CRIs of the K shares of CSI-RS resources, and K and M are integers greater than 1, and X is greater than or equal to 1 is an integer less than M;
- the first CSI-RS resource is N CSI-RS ports
- the first CSI includes a PMI
- N is an integer greater than 1
- X is an integer greater than or equal to 1.
- the second CSI-RS resource is a group or groups of resources in a resource set, where the resource set is a resource set configured by the base station.
- the processor 1204 is specifically configured to: according to the K-part CSI Determining, by the correspondence between the K CRIs of the RS resource and the R group resources in the resource set, the second CSI-RS resource, where R is an integer greater than 1;
- the processor 1204 is specifically configured to: according to the value of the PMI and the R group resource in the resource set The corresponding relationship determines the second CSI-RS resource, and R is an integer greater than one.
- the transmitter 1201 sends the first CSI-RS and the second CSI-RS in a CSI process, where the transmitter 1201 is periodically cycled in a first transmission cycle. Sending, by the first CSI-RS, the first CSI-RS to the UE, where the first sending time point is a start time of the first sending period, and in the first sending period, the The transmitter 1201 periodically sends the second CSI-RS to the UE on the second CSI-RS resource in a period of the second sending period, where the second sending time point is the first sending period. The start time of any second transmission period within.
- the transmitter 1201 sends the first CSI-RS and the second CSI-RS in a CSI process, where the transmitter 1201 is periodically cycled in a first transmission cycle. Sending, by the first CSI-RS, the first CSI-RS to the UE, where the first sending time point is a start time of a first sending period, and in the first sending period,
- the processor 1204 is further configured to determine whether to send a second CSI-RS to the UE on the second CSI-RS resource at a second sending time point, and if yes, the transmitter 1201 is at a third sending time point.
- the second CSI-RS measures the second CSI, where the third sending time point is the second sending time point or the third sending time point is at the first sending time point and the second sending time point
- the second transmission time point is located in the first transmission period.
- the transmitter 1201 is in the resource at the second sending time point.
- the PDSCH data is transmitted to the UE on the idle CSI-RS resource in the set.
- the transmitter 1201 is further configured to: send, to the UE, indication information, where the indication information is used to indicate a CSI-RS resource used to transmit PDSCH data in the resource set.
- the indication information is carried in a physical downlink control channel PDCCH.
- the resource set is shared by multiple UEs.
- the transmitter 1201 is specifically configured to: send the indication information to the multiple UEs on the common control channel at the second sending time point.
- the transmitter 1201 is further configured to: send configuration information to the UE, where the configuration information includes a location of a resource in the resource set, a location of the first CSI-RS resource, and the a first transmission period and the second transmission period.
- the transmitter 1201, the receiver 1202, and the processor 1204 are configured to perform the method described in the foregoing embodiment.
- the transmitter 1201 is configured to execute according to the method shown in FIG. Steps 201 and 205, the receiver 1202 is configured to perform step 204 based on the method shown in FIG. 2, and the processor 1204 is configured to perform step 204 in the method based on FIG. 2; the transmitter 1201 is further configured to perform Based on step 502, step 506 and step 508 in the method shown in FIG. 5, the receiver 1202 is further configured to perform step 505 based on the method shown in FIG. 5, and the processor 1204 is further configured to perform the method based on FIG.
- the processor 1204 is further configured to perform step 801, step 805, and step 808 in the method based on FIG.
- the sending unit 1101 may be the transmitter 1201, the receiving unit 1102 may be the receiver 1202, and the determining unit 1103 may be the processor 1204.
- the transmitting unit 1101 in the base station 110 and the transmitter 1201 in the base station 120 may be transmitters of the base station, and the receiving unit 1102 in the base station 110 and the receiver 1202 in the base station 120 may be receivers of the base station, and the base station
- the other units in the 110 may be embedded in the hardware or in the processor 1204 of the base station, or may be stored in the memory 1203 of the base station in software, so that the processor 1204 calls to perform operations corresponding to the above units.
- the processor may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
- CPU Central Processing Unit
- ASIC Application Specific Integrated Circuit
- the embodiment of the present invention further provides a UE 130.
- the UE 130 includes:
- the receiving unit 1301 is configured to receive, at the first receiving time point, a first CSI-RS sent by the base station on the first CSI-RS resource;
- the measuring unit 1302 is configured to measure the first CSI according to the first CSI-RS;
- the sending unit 1303 is configured to send the first CSI to the base station
- the receiving unit 1301 is further configured to receive, at a second receiving time point, a second CSI-RS that is sent by the base station on a second CSI-RS resource, where the second CSI-RS resource is a first CSI-determined resource for transmitting the second CSI-RS, where the second CSI-RS resource includes X CSI-RS ports, and the second receiving time point is after the first receiving time point;
- the measuring unit 1302 is further configured to measure the second CSI according to the second CSI-RS;
- the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, where the first CSI includes a target CRI and The PMI or the first CSI includes the target CRI, and the target CRI is one of K CRIs of the K CSI-RS resources, K and M are integers greater than 1, and X is greater than or equal to 1 An integer of M; or, the first CSI-RS resource is N CSI-RS ports, the first CSI includes a PMI, N is an integer greater than 1, and X is an integer greater than or equal to 1.
- the second CSI-RS resource is a group or groups of resources in a resource set, where the resource set is a resource set configured by the base station.
- the receiving unit 1301 receives the first CSI-RS and the second CSI-RS in a CSI process, and the receiving unit 1301 periodically receives the first receiving period as a period.
- the start time of any second receiving period within.
- the receiving unit 1301 receives the first CSI-RS and the second CSI-RS in a CSI process, and the receiving unit 1301 periodically receives the first receiving period as a period.
- the first CSI-RS sent by the base station on the first CSI-RS resource, the first receiving time point is a start time of the first receiving period, and in the first receiving period,
- the receiving unit 1301 receives the trigger information sent by the base station at a third receiving time point, where the third receiving time point is the second receiving time point or the third receiving time point is at the first receiving time Between the point and the second receiving time point, the second receiving time point is located in the first receiving period;
- the measuring unit 1302 acquires the second CSI-RS triggered by the trigger information, and measures the second CSI according to the second CSI-RS.
- the receiving unit 1301 is further configured to:
- the UE further includes a determining unit 1304, configured to determine, according to the indication information, a CSI-RS resource for transmitting PDSCH data in the resource set according to the indication information;
- the UE further includes an acquiring unit 1305, where the acquiring unit 1305 is configured to acquire the PDSCH data on a CSI-RS resource used for transmitting PDSCH data in the resource set.
- the resource set is shared by multiple UEs.
- the receiving unit 1301 is configured to: receive the indication information sent by the base station on a common control channel at a second receiving time point.
- the receiving unit 1301 is further configured to:
- the determining unit 1304 is further configured to determine, according to the configuration information, a location of the resource in the resource set, a location of the first CSI-RS resource, a first sending period, and a second sending period, where the first The sending period is a period in which the base station sends the first CSI-RS to the UE, and the second sending period is that the base station sends the second CSI-RS to the UE in a first sending period. Cycle.
- the embodiment of the present invention further provides a UE 140.
- the UE 140 includes: a receiver 1401, a memory 1402, a processor 1403, and a transmitter 1404;
- the receiver 1401, the memory 1402, the processor 1403, and the transmitter 1404 are coupled together by a bus system 1405.
- the memory 1402 may include a random access memory, and may also include a non-volatile memory, such as at least A disk storage.
- the bus system 1405 can be an ISA bus, a PCI bus, or an EISA bus.
- the bus system 1405 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.
- the receiver 1401 is configured to receive, at a first receiving time point, a first CSI-RS sent by the base station on the first CSI-RS resource;
- the memory 1402 is configured to store a code, and the processor 1403 performs an action according to the code: measuring a first CSI according to the first CSI-RS;
- the transmitter 1404 is configured to send the first CSI to the base station
- the receiver 1401 is further configured to receive, at a second receiving time point, a second CSI-RS sent by the base station on a second CSI-RS resource, where the second CSI-RS resource is a first CSI-determined resource for transmitting the second CSI-RS, where the second CSI-RS resource includes X CSI-RS ports, and the second receiving time point is after the first receiving time point;
- the processor 1403 is further configured to measure a second CSI according to the second CSI-RS;
- the first CSI-RS resource is a K-CSI-RS resource, and the K-CSI-RS resource includes M CSI-RS ports, where the first CSI includes a target CRI and a PMI or the first CSI.
- the target CRI is one of K CRIs of the K parts of CSI-RS resources, K and M are integers greater than 1, and X is an integer greater than or equal to 1 less than M;
- the first CSI-RS resource is N CSI-RS ports, the first CSI includes PMI, N is an integer greater than 1, and X is greater than or equal to 1. The integer.
- the second CSI-RS resource is a group or groups of resources in a resource set, where the resource set is a resource set configured by the base station.
- the receiver 1401 receives the first CSI-RS and the second CSI-RS in a CSI process, and the receiver 1401 periodically receives the first receiving period as a period.
- the start time of any second receiving period within.
- the receiver 1401 receives the first CSI-RS and the second CSI-RS in a CSI process, and the receiver 1401 periodically receives the first receiving period as a period.
- the first CSI-RS sent by the base station on the first CSI-RS resource, the first receiving time point is a start time of the first receiving period, and in the first receiving period,
- the receiver 1401 is further configured to: receive trigger information sent by the base station at a third receiving time point, where the third receiving time point is the second receiving time point or the third receiving time point is Between the first receiving time point and the second receiving time point, the second receiving time point is located in the first receiving period;
- the processor 1403 is configured to acquire the second CSI-RS triggered by the trigger information, and measure the second CSI according to the second CSI-RS.
- the receiver 1401 is further configured to: receive the indication information sent by the base station at a second receiving time point, where the indication information is carried in a PDCCH;
- the processor 1403 is further configured to determine the resource set according to the indication information.
- the processor 1403 is further configured to acquire the PDSCH data on a CSI-RS resource used for transmitting PDSCH data in the resource set.
- the resource set is shared by multiple UEs.
- the receiver 1401 is specifically configured to: receive the indication information sent by the base station on a common control channel at a second receiving time point.
- the receiver 1401 is further configured to receive configuration information sent by the base station, where the processor 1403 is further configured to determine, according to the configuration information, a location of the resource in the resource set, where the a CSI-RS resource location, a first transmission period, and a second transmission period, where the first transmission period is a period in which the base station sends the first CSI-RS to the UE, and the second transmission period is And transmitting, by the base station, the period of the second CSI-RS to the UE in a first sending period.
- the receiver 1401, the transmitter 1404, and the processor 1403 are configured to perform the method described in the foregoing embodiment.
- the receiver 1401 is configured to execute according to the method shown in FIG. Step 202 and step 206
- the processor 1403 is configured to perform step 202 and step 206 based on the method shown in FIG. 2
- the transmitter 1404 is configured to perform step 203 in the method based on FIG. 2
- the receiver 1401 uses For performing step 503, step 507 and step 509 in the method based on FIG. 5
- the processor 1403 is configured to execute step 503, step 507 and step 509 in the method based on FIG. 5
- the transmitter 1404 is configured to execute Based on step 504 in the method shown in FIG.
- the receiver 1401 is configured to perform step 803, step 807 and step 809 in the method based on FIG. 8, and the processor 1403 is configured to execute the method based on FIG.
- the transmitter 1404 is configured to perform step 804 in the method based on FIG.
- the receiving unit 1301 may be the receiver 1401, the sending unit 1303 may be the transmitter 1404, and the measuring unit 1302, the determining unit 1304, and the obtaining unit 1305 may be the processor 1403.
- the receiving unit 1301 in the UE 130 and the receiver 1401 in the UE 140 may be radio frequency (RF) circuits, and other units in the UE 130 may be embedded in hardware or in a processor independent of the UE. , may also be stored in the memory of the UE in the form of software, so that the processor calls to perform operations corresponding to the above various units, the processor may be a CPU, an ASIC or one or more integrations configured to implement embodiments of the present invention. Circuit.
- RF radio frequency
- the disclosed apparatus and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the modules is only a logical function division.
- there may be another division manner for example, multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
- the modules described as separate components may or may not be physically separated.
- the components displayed as modules may or may not be physical modules, 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 module in each embodiment of the present invention may be integrated into one processing module, or two or more modules may be integrated into one module.
- the above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.
- the above-described integrated modules implemented in the form of software function modules can be stored in a computer readable storage medium.
- the software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some 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, and the program code can be stored. Medium.
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Abstract
本发明实施例公开了一种传输信道状态信息参考信号的方法及装置,涉及通信技术领域,用以提高CSI-RS资源的利用率。该方法包括:基站在第一发送时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;所述基站接收所述UE发送的第一信道状态信息CSI,所述第一CSI为所述UE根据所述第一CSI-RS测量得到的CSI;所述基站根据所述第一CSI确定第二CSI-RS资源;所述基站在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二发送时间点在所述第一发送时间点之后。
Description
本发明涉及通信技术领域,尤其涉及一种传输信道状态信息参考信号(Channel State Information Reference Signal,简称CSI-RS)的方法及装置。
多输入多输出(Multiple Input Multiple Output,简称MIMO)***中通过采用波束赋形(BeamForming,简称BF)技术获得阵列增益,在LTE Rel-13中还定义了波束赋形的CSI-RS,即基站对CSI-RS做波束赋形,并向小区内的用户设备(User Equipment,UE)发送经过波束赋形的CSI-RS。
LTE Rel-13中定义的一种发送波束赋形的CSI-RS的方式为:基站在一个信道状态信息(Channel State Information,简称CSI)进程中,如图1所示,以T1为周期,周期性的在K(K为大于1的整数)份CSI-RS资源上发送K份波束赋形的CSI-RS,一份CSI-RS资源包括至少一个CSI-RS端口(图1中以K=2、一份CSI-RS资源包括4个CSI-RS端口为例进行绘制)。如图1所示,UE以T2为周期,周期性的检测K份CSI-RS资源中的最优的CSI-RS资源并向基站反馈,以T3为周期,周期性的测量CSI并向基站反馈,其中,T2≥T3≥T1。
在上述方式中,UE在第n(n为正整数)次确定最优的CSI-RS资源之后,在第n+1次确定最优的CSI-RS资源之前,UE只需要在第n次确定的最优的CSI-RS资源上测量CSI,但是基站依然以T1为周期,周期性的发送K份波束赋形的CSI-RS,造成了CSI-RS资源的浪费。
发明内容
本发明的实施例提供一种传输CSI-RS的方法及装置,用以提高CSI-RS资源的利用率。
为达到上述目的,本发明的实施例采用如下技术方案:
第一方面,提供一种传输CSI-RS的方法,包括:基站在第一发送时间点在第一CSI-RS资源上向UE发送第一CSI-RS;第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源包括M个CSI-RS端口,K、M均为大于1的整数;或者,第一CSI-RS资源为N个CSI-RS端口,N为大于1的整数;基站接收UE发送的第一CSI,第一CSI为UE根据第一CSI-RS测量得到的CSI;当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CRI和PMI或第一CSI包括目标CRI,目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包括PMI;基站根据第一CSI确定第二CSI-RS资源;基站在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,第二CSI-RS资源包括X个CSI-RS端口,第二发送时间点在第一发送时间点之后,当第一CSI-RS资源为K份CSI-RS资源时,X为大于等于1小于M的整数,当第一CSI-RS资源为N个CSI-RS端口时,X为大于等于1的整数。
本发明实施例提供的方法,基站在第一发送时间点在第一CSI-RS资源上发送第一CSI-RS之后,UE根据第一CSI-RS测量第一CSI并向基站反馈,基站根据第一CSI确定第二CSI-RS资源,并在第二CSI-RS资源上向UE发送第二CSI-RS,当第二CSI-RS资源包含的CSI-RS端口数小于K份CSI-RS资源包含的CSI-RS端口数或者N的值设置的较小(第一CSI-RS资源为N个CSI-RS端口的情况下)时,基站不需要在过多的端口上发送第二CSI-RS,因此,能够节约CSI-RS资源。
结合第一方面,在第一种可能的实现方式中,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。
结合第一方面的第一种可能的实现方式,在第二种可能的实现方式中,当第一CSI-RS资源为K份CSI-RS资源、且第一CSI包括目标CRI时,基站根据第一CSI确定第二CSI-RS资源,包括:基站根据K份CSI-RS资源的K个CRI与资源集合中的R组资源的对应关系确定第二CSI-RS资源,R为大于1的整数;当第一CSI-RS资源为N个CSI-RS端口时,基站根据第一CSI确定第二CSI-RS资源,包括:基站根据PMI的值与资源集合中的R组资源的对应关系确定第二CSI-RS资源,R为大于1的整数。
结合第一方面、第一方面的第一种可能的实现方式或第二种可能的实现方式,在第三种可能的实现方式中,基站在一个CSI进程中发送第一CSI-RS和第二CSI-RS,基站以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,基站以第二发送周期为周期,周期性的在第二CSI-RS资源上向UE发送第二CSI-RS,第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
结合第一方面、第一方面的第一种可能的实现方式或第二种可能的实现方式,在第四种可能的实现方式中,基站在一个CSI进程中发送第一CSI-RS和第二CSI-RS,基站以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,基站在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,包括:基站确定是否在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,若是,基站在第三发送时间点向UE发送触发信息
并在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,触发信息用于触发UE根据第二CSI-RS测量第二CSI,第三发送时间点为第二发送时间点或第三发送时间点在第一发送时间点和第二发送时间点之间,第二发送时间点位于该第一发送周期内。
结合第一方面的第一种可能的实现方式至第四种可能的实现方式中的任一种,在第五种可能的实现方式中,当基站在第二发送时间点确定需要向UE发送PDSCH数据时,基站在第二发送时间点在资源集合中的空闲的CSI-RS资源上向UE发送PDSCH数据。
其中,资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源,通过在资源集合中的空闲的CSI-RS资源上发送PDSCH数据,可以提高资源集合中的CSI-RS资源的利用率。
结合第一方面的第五种可能的实现方式,在第六种可能的实现方式中,基站在第二发送时间点向UE发送指示信息,指示信息用于指示资源集合中的用于传输PDSCH数据的CSI-RS资源,指示信息承载在PDCCH中。
结合第一方面的第一种可能的实现方式至第六种可能的实现方式中的任一种,在第七种可能的实现方式中,资源集合被多个UE共享。
在资源集合被多个UE共享的情况下,不需要为每个UE配置一个资源集合,因此,能够提高资源的利用率。
结合第一方面的第六种可能的实现方式,在第八种可能的实现方式中,基站在第二发送时间点向UE发送指示信息,包括:基站在第二发送时间点在公共控制信道向多个UE发送指示信息。
在资源集合被多个UE共享的情况下,相比为每个UE分别发送
指示信息而言,在公共控制信道向多个UE发送指示信息,可以降低信令开销。
结合第一方面的第三种可能的实现方式,在第九种可能的实现方式中,该方法还包括:基站向UE发送配置信息,配置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期。
第二方面,提供一种传输CSI-RS的方法,包括:UE在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源包括M个CSI-RS端口,K、M均为大于1的整数;或者,第一CSI-RS资源为N个CSI-RS端口,N为大于1的整数;UE根据第一CSI-RS测量第一CSI;当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CRI和PMI或第一CSI包括目标CRI,目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包括PMI;UE向基站发送第一CSI;UE在第二接收时间点接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二CSI-RS资源为基站根据第一CSI确定的发送第二CSI-RS的资源,第二CSI-RS资源包括X个CSI-RS端口,第二接收时间点在第一接收时间点之后,当第一CSI-RS资源为K份CSI-RS资源时,X为大于等于1小于M的整数,当第一CSI-RS资源为N个CSI-RS端口时,X为大于等于1的整数;UE根据第二CSI-RS测量第二CSI。
本发明实施例提供的方法,UE在接收到基站在第一发送时间点在第一CSI-RS资源上发送第一CSI-RS之后,根据第一CSI-RS测量第一CSI并向基站反馈,基站根据第一CSI确定第二CSI-RS资源,并在第二CSI-RS资源上向UE发送第二CSI-RS,当第二CSI-RS资源包含的CSI-RS端口数小于K份CSI-RS资源包含的CSI-RS端口
数或者N的值设置的较小(第一CSI-RS资源为N个CSI-RS端口的情况下)时,基站不需要在过多的端口上发送第二CSI-RS,因此,能够节约CSI-RS资源。
结合第二方面,在第一种可能的实现方式中,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。
结合第二方面或第二方面的第一种可能的实现方式,在第二种可能的实现方式中,UE在一个CSI进程中接收第一CSI-RS和第二CSI-RS,UE以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间,在该第一接收周期内,UE以第二接收周期为周期,周期性的接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
结合第二方面或第二方面的第一种可能的实现方式,在第三种可能的实现方式中,UE在一个CSI进程中接收第一CSI-RS和第二CSI-RS,UE以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间,在该第一接收周期内,UE根据第二CSI-RS测量第二CSI,包括:UE在第三接收时间点接收基站发送的触发信息,第三接收时间点为第二接收时间点或第三接收时间点在第一接收时间点和第二接收时间点之间,第二接收时间点位于该第一接收周期内;UE在触发信息的触发下获取第二CSI-RS,并根据第二CSI-RS测量第二CSI。
结合第二方面的第一种可能的实现方式至第三种可能的实现方式中的任一种,在第四种可能的实现方式中,该方法还包括:UE在第二接收时间点接收基站发送的指示信息,指示信息承载在PDCCH
中;UE根据指示信息确定资源集合中的用于传输PDSCH数据的CSI-RS资源;UE在资源集合中的用于传输PDSCH数据的CSI-RS资源上获取PDSCH数据。
其中,基站在资源集合中的空闲的CSI-RS资源发送PDSCH数据,资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源,通过在资源集合中的空闲的CSI-RS资源上发送PDSCH数据,可以提高资源集合中的CSI-RS资源的利用率。
结合第二方面的第一种可能的实现方式或第四种可能的实现方式,在第五种可能的实现方式中,资源集合被多个UE共享。
在资源集合被多个UE共享的情况下,不需要为每个UE配置一个资源集合,因此,能够提高资源的利用率。
结合第二方面的第四种可能的实现方式,在第六种可能的实现方式中,UE在第二接收时间点接收基站发送的指示信息,包括:UE在第二接收时间点在公共控制信道接收基站发送的指示信息。
在资源集合被多个UE共享的情况下,相比为每个UE分别发送指示信息而言,在公共控制信道向多个UE发送指示信息,可以降低信令开销。
结合第二方面的第二种可能的实现方式,在第七种可能的实现方式中,UE接收基站发送的配置信息;UE根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期,第一发送周期为基站向UE发送第一CSI-RS的周期,第二发送周期为在一个第一发送周期内基站向UE发送第二CSI-RS的周期。
第三方面,提供一种基站,包括:发送单元,用于在第一发送
时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源包括M个CSI-RS端口,K、M均为大于1的整数;或者,第一CSI-RS资源为N个CSI-RS端口,N为大于1的整数;接收单元,用于接收UE发送的第一CSI,第一CSI为UE根据第一CSI-RS测量得到的CSI;当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CRI和PMI或第一CSI包括目标CRI,目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包括PMI;确定单元,用于根据第一CSI确定第二CSI-RS资源;发送单元,还用于在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,第二CSI-RS资源包括X个CSI-RS端口,第二发送时间点在第一发送时间点之后,当第一CSI-RS资源为K份CSI-RS资源时,X为大于等于1小于M的整数,当第一CSI-RS资源为N个CSI-RS端口时,X为大于等于1的整数。
由于基站中的各个单元用于执行上述方法,基站的有益效果可参见方法部分所述的有益效果。
结合第三方面,在第一种可能的实现方式中,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。
结合第三方面的第一种可能的实现方式,在第二种可能的实现方式中,当第一CSI-RS资源为K份CSI-RS资源、且第一CSI包括目标CRI时,确定单元,具体用于根据K份CSI-RS资源的K个CRI与资源集合中的R组资源的对应关系确定第二CSI-RS资源,R为大于1的整数;当第一CSI-RS资源为N个CSI-RS端口时,确定单元,具体用于根据PMI的值与资源集合中的R组资源的对应关系确定第二CSI-RS资源,R为大于1的整数。
结合第三方面、第三方面的第一种可能的实现方式或第二种可
能的实现方式,在第三种可能的实现方式中,发送单元在一个CSI进程中发送第一CSI-RS和第二CSI-RS,发送单元以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,发送单元以第二发送周期为周期,周期性的在第二CSI-RS资源上向UE发送第二CSI-RS,第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
结合第三方面、第三方面的第一种可能的实现方式或第二种可能的实现方式,在第四种可能的实现方式中,发送单元在一个CSI进程中发送第一CSI-RS和第二CSI-RS,发送单元以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,确定单元,还用于确定是否在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS;若是,发送单元在第三发送时间点向UE发送触发信息并在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,触发信息用于触发UE根据第二CSI-RS测量第二CSI,第三发送时间点为第二发送时间点或第三发送时间点在第一发送时间点和第二发送时间点之间,第二发送时间点位于该第一发送周期内。
结合第三方面的第一种可能的实现方式至第四种可能的实现方式中的任一种,在第五种可能的实现方式中,当确定单元在第二发送时间点确定需要向UE发送PDSCH数据时,发送单元,还用于在第二发送时间点在资源集合中的空闲的CSI-RS资源上向UE发送PDSCH数据。
其中,资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源,通过在资源集合中的空闲的
CSI-RS资源上发送PDSCH数据,可以提高资源集合中的CSI-RS资源的利用率。
结合第三方面的第五种可能的实现方式,在第六种可能的实现方式中,发送单元,还用于:在第二发送时间点向UE发送指示信息,指示信息用于指示资源集合中的用于传输PDSCH数据的CSI-RS资源,指示信息承载在PDCCH中。
结合第三方面的第一种可能的实现方式至第六种可能的实现方式中的任一种,在第七种可能的实现方式中,资源集合被多个UE共享。
在资源集合被多个UE共享的情况下,不需要为每个UE配置一个资源集合,因此,能够提高资源的利用率。
结合第三方面的第六种可能的实现方式,在第八种可能的实现方式中,发送单元,具体用于:在第二发送时间点在公共控制信道向多个UE发送指示信息。
在资源集合被多个UE共享的情况下,相比为每个UE分别发送指示信息而言,在公共控制信道向多个UE发送指示信息,可以降低信令开销。
结合第三方面的第三种可能的实现方式,在第九种可能的实现方式中,发送单元,还用于:向UE发送配置信息,配置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期。
第四方面,提供一种UE,包括:接收单元,用于在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源包括M个CSI-RS端口,K、M均为大于1的整数;或者,第一CSI-RS资源为N个CSI-RS
端口,N为大于1的整数;测量单元,用于根据第一CSI-RS测量第一CSI;当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CRI和PMI或第一CSI包括目标CRI,目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包括PMI;发送单元,用于向基站发送第一CSI;接收单元,还用于在第二接收时间点接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二CSI-RS资源为基站根据第一CSI确定的发送第二CSI-RS的资源,第二CSI-RS资源包括X个CSI-RS端口,第二接收时间点在第一接收时间点之后,当第一CSI-RS资源为K份CSI-RS资源时,X为大于等于1小于M的整数,当第一CSI-RS资源为N个CSI-RS端口时,X为大于等于1的整数;测量单元,还用于根据第二CSI-RS测量第二CSI。
由于UE中的各个单元用于执行上述方法,UE的有益效果可参见方法部分所述的有益效果。
结合第四方面,在第一种可能的实现方式中,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。
结合第四方面或第四方面的第一种可能的实现方式,在第二种可能的实现方式中,接收单元在一个CSI进程中接收第一CSI-RS和第二CSI-RS,接收单元以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间,在该第一接收周期内,接收单元以第二接收周期为周期,周期性的接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
结合第四方面或第四方面的第一种可能的实现方式,在第三种可能的实现方式中,接收单元在一个CSI进程中接收第一CSI-RS和
第二CSI-RS,接收单元以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间,在该第一接收周期内,接收单元在第三接收时间点接收基站发送的触发信息,第三接收时间点为第二接收时间点或第三接收时间点在第一接收时间点和第二接收时间点之间,第二接收时间点位于该第一接收周期内;测量单元在触发信息的触发下获取第二CSI-RS,并根据第二CSI-RS测量第二CSI。
结合第四方面的第一种可能的实现方式至第三种可能的实现方式中的任一种,在第四种可能的实现方式中,接收单元,还用于:在第二接收时间点接收基站发送的指示信息,指示信息承载在PDCCH中;UE还包括确定单元,确定单元,用于根据指示信息确定资源集合中的用于传输PDSCH数据的CSI-RS资源;UE还包括获取单元,获取单元,用于在资源集合中的用于传输PDSCH数据的CSI-RS资源上获取PDSCH数据。
其中,基站在资源集合中的空闲的CSI-RS资源发送PDSCH数据,资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源,通过在资源集合中的空闲的CSI-RS资源上发送PDSCH数据,可以提高资源集合中的CSI-RS资源的利用率。
结合第四方面的第一种可能的实现方式或第四种可能的实现方式,在第五种可能的实现方式中,资源集合被多个UE共享。
在资源集合被多个UE共享的情况下,不需要为每个UE配置一个资源集合,因此,能够提高资源的利用率。
结合第四方面的第四种可能的实现方式,在第六种可能的实现方式中,接收单元,具体用于:在第二接收时间点在公共控制信道接收基站发送的指示信息。
在资源集合被多个UE共享的情况下,相比为每个UE分别发送
指示信息而言,在公共控制信道向多个UE发送指示信息,可以降低信令开销。
结合第四方面的第二种可能的实现方式,在第七种可能的实现方式中,接收单元,还用于:接收基站发送的配置信息;确定单元,还用于根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期,第一发送周期为基站向UE发送第一CSI-RS的周期,第二发送周期为在一个第一发送周期内基站向UE发送第二CSI-RS的周期。
第五方面,提供一种基站,包括:发送器、接收器、存储器和处理器;发送器,用于在第一发送时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源包括M个CSI-RS端口,K、M均为大于1的整数;或者,第一CSI-RS资源为N个CSI-RS端口,N为大于1的整数;接收器,用于接收UE发送的第一CSI,第一CSI为UE根据第一CSI-RS测量得到的CSI;当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CRI和PMI或第一CSI包括目标CRI,目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包括PMI;存储器用于存储代码,处理器根据代码执行以下动作:根据第一CSI确定第二CSI-RS资源;发送器,还用于在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,第二CSI-RS资源包括X个CSI-RS端口,第二发送时间点在第一发送时间点之后,当第一CSI-RS资源为K份CSI-RS资源时,X为大于等于1小于M的整数,当第一CSI-RS资源为N个CSI-RS端口时,X为大于等于1的整数。
由于基站中的各个器件用于执行上述方法,基站的有益效果可参见方法部分所述的有益效果。
结合第五方面,在第一种可能的实现方式中,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。
结合第五方面的第一种可能的实现方式,在第二种可能的实现方式中,当第一CSI-RS资源为K份CSI-RS资源、且第一CSI包括目标CRI时,处理器,具体用于:根据K份CSI-RS资源的K个CRI与资源集合中的R组资源的对应关系确定第二CSI-RS资源,R为大于1的整数;
当第一CSI-RS资源为N个CSI-RS端口时,处理器,具体用于:根据PMI的值与资源集合中的R组资源的对应关系确定第二CSI-RS资源,R为大于1的整数。
结合第五方面、第五方面的第一种可能的实现方式或第二种可能的实现方式,在第三种可能的实现方式中,发送器在一个CSI进程中发送第一CSI-RS和第二CSI-RS,发送器以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,发送器以第二发送周期为周期,周期性的在第二CSI-RS资源上向UE发送第二CSI-RS,第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
结合第五方面、第五方面的第一种可能的实现方式或第二种可能的实现方式,在第四种可能的实现方式中,发送器在一个CSI进程中发送第一CSI-RS和第二CSI-RS,发送器以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,处理器还用于确定是否在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,若是,发送器在第三发送时间点向UE发送触发信息并在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,触发信息用于触发UE根据第二CSI-RS测量第二CSI,第
三发送时间点为第二发送时间点或第三发送时间点在第一发送时间点和第二发送时间点之间,第二发送时间点位于该第一发送周期内。
结合第五方面的第一种可能的实现方式至第四种可能的实现方式中的任一种,在第五种可能的实现方式中,当处理器在第二发送时间点确定需要向UE发送PDSCH数据时,发送器在第二发送时间点在资源集合中的空闲的CSI-RS资源上向UE发送PDSCH数据。
其中,资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源,通过在资源集合中的空闲的CSI-RS资源上发送PDSCH数据,可以提高资源集合中的CSI-RS资源的利用率。
结合第五方面的第五种可能的实现方式,在第六种可能的实现方式中,发送器还用于:在第二发送时间点向UE发送指示信息,指示信息用于指示资源集合中的用于传输PDSCH数据的CSI-RS资源,指示信息承载在PDCCH中。
结合第五方面的第一种可能的实现方式至第六种可能的实现方式中的任一种,在第七种可能的实现方式中,资源集合被多个UE共享。
在资源集合被多个UE共享的情况下,不需要为每个UE配置一个资源集合,因此,能够提高资源的利用率。
结合第五方面的第六种可能的实现方式,在第八种可能的实现方式中,发送器具体用于:在第二发送时间点在公共控制信道向多个UE发送指示信息。
在资源集合被多个UE共享的情况下,相比为每个UE分别发送指示信息而言,在公共控制信道向多个UE发送指示信息,可以降低信令开销。
结合第五方面的第三种可能的实现方式,在第九种可能的实现
方式中,发送器还用于:向UE发送配置信息,配置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期。
第六方面,提供一种UE,包括:接收器、存储器、处理器和发送器;接收器,用于在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源包括M个CSI-RS端口,K、M均为大于1的整数;或者,第一CSI-RS资源为N个CSI-RS端口,N为大于1的整数;存储器用于存储代码,处理器根据代码执行以下动作:根据第一CSI-RS测量第一CSI;当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CRI和PMI或第一CSI包括目标CRI,目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包括PMI;发送器,用于向基站发送第一CSI;接收器,还用于在第二接收时间点接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二CSI-RS资源为基站根据第一CSI确定的发送第二CSI-RS的资源,第二CSI-RS资源包括X个CSI-RS端口,第二接收时间点在第一接收时间点之后,当第一CSI-RS资源为K份CSI-RS资源时,X为大于等于1小于M的整数,当第一CSI-RS资源为N个CSI-RS端口时,X为大于等于1的整数;处理器,还用于根据第二CSI-RS测量第二CSI。
由于UE中的各个器件用于执行上述方法,UE的有益效果可参见方法部分所述的有益效果。
结合第六方面,在第一种可能的实现方式中,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。
结合第六方面或第六方面的第一种可能的实现方式,在第二种可能的实现方式中,接收器在一个CSI进程中接收第一CSI-RS和第二CSI-RS,接收器以第一接收周期为周期,周期性的接收基站在第
一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间,在该第一接收周期内,接收器以第二接收周期为周期,周期性的接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
结合第六方面或第六方面的第一种可能的实现方式,在第三种可能的实现方式中,接收器在一个CSI进程中接收第一CSI-RS和第二CSI-RS,接收器以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间,在该第一接收周期内,接收器还用于:在第三接收时间点接收基站发送的触发信息,第三接收时间点为第二接收时间点或第三接收时间点在第一接收时间点和第二接收时间点之间,第二接收时间点位于该第一接收周期内;处理器,具体用于在触发信息的触发下获取第二CSI-RS,并根据第二CSI-RS测量第二CSI。
结合第六方面的第一种可能的实现方式至第三种可能的实现方式中的任一种,在第四种可能的实现方式中,接收器还用于,在第二接收时间点接收基站发送的指示信息,指示信息承载在PDCCH中;处理器,还用于根据指示信息确定资源集合中的用于传输PDSCH数据的CSI-RS资源;处理器,还用于在资源集合中的用于传输PDSCH数据的CSI-RS资源上获取PDSCH数据。
其中,基站在资源集合中的空闲的CSI-RS资源发送PDSCH数据,资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源,通过在资源集合中的空闲的CSI-RS资源上发送PDSCH数据,可以提高资源集合中的CSI-RS资源的利用率。
结合第六方面的第一种可能的实现方式或第四种可能的实现方
式,在第五种可能的实现方式中,资源集合被多个UE共享。
在资源集合被多个UE共享的情况下,不需要为每个UE配置一个资源集合,因此,能够提高资源的利用率。
结合第六方面的第四种可能的实现方式,在第六种可能的实现方式中,接收器具体用于:在第二接收时间点在公共控制信道接收基站发送的指示信息。
在资源集合被多个UE共享的情况下,相比为每个UE分别发送指示信息而言,在公共控制信道向多个UE发送指示信息,可以降低信令开销。
结合第六方面的第二种可能的实现方式,在第七种可能的实现方式中,接收器,还用于接收基站发送的配置信息;处理器,还用于根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期,第一发送周期为基站向UE发送第一CSI-RS的周期,第二发送周期为在一个第一发送周期内基站向UE发送第二CSI-RS的周期。
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为现有技术中的一种基站发送CSI-RS的示意图;
图2为本发明实施例提供的一种传输CSI-RS的方法的流程图;
图3为本发明实施例提供的一种K份CSI-RS资源的示意图;
图4为本发明实施例提供的一种资源集合的示意图;
图5为本发明实施例提供的一种传输CSI-RS的方法的流程图;
图6为本发明实施例提供的一种基站发送CSI-RS的示意图;
图7为本发明实施例提供的又一种基站发送CSI-RS的示意图;
图8为本发明实施例提供的一种传输CSI-RS的方法的流程图;
图9为本发明实施例提供的一种基站发送CSI-RS的示意图;
图10为本发明实施例提供的又一种基站发送CSI-RS的示意图;
图11为本发明实施例提供的一种基站的组成示意图;
图12为本发明实施例提供的又一种基站的组成示意图;
图13为本发明实施例提供的一种UE的组成示意图;
图14为本发明实施例提供的又一种UE的组成示意图。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
LTE Rel-13中定义了两种发送波束赋形的CSI-RS的方式,分别为:
第一种方式:基站在一个CSI进程中,周期性的在K份CSI-RS资源上发送K份波束赋形的CSI-RS,一份CSI-RS资源包括至少一个CSI-RS端口,一份CSI-RS资源与一个具有指向性的波束对应。
第二种方式:基站在一个CSI进程中,周期性的在一份CSI-RS资源上发送波束赋形的CSI-RS,该份CSI-RS资源包括多对CSI-RS端口,一对CSI-RS端口与一个具有指向性的波束对应,每对CSI-RS
端口中的一个端口为采用一个极化方向天线对应的波束对该端口加权后形成的端口。或者,基站在一个CSI进程中,周期性的在一份CSI-RS资源上发送波束赋形的CSI-RS,该份CSI-RS资源包括至少一个CSI-RS端口,该份CSI-RS资源对应一个具有指向性的波束。
另外,基站还可以在多个CSI-RS端口上向UE发送未波束赋型的CSI-RS,本发明实施例中将该种发送CSI-RS的方式称为第三种发送CSI-RS的方式。
本发明实施例提供一种传输CSI-RS的方法,如图2所示,该方法包括:
201、基站在第一发送时间点在第一CSI-RS资源上向UE发送第一CSI-RS。
第一发送时间点可以为任意一个时间点,本发明实施例对此不进行限定。
其中,第一CSI-RS资源可以为K份CSI-RS资源,一份CSI-RS资源包括至少一个CSI-RS端口,该情况下,第一CSI-RS可以为K份波束赋形的CSI-RS,第一CSI-RS资源也可以为N个CSI-RS端口,该情况下,第一CSI-RS可以为未波束赋形的CSI-RS,K、N均为大于1的整数。
202、UE在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS,并根据第一CSI-RS测量第一CSI。
其中,当第一CSI-RS资源为K份CSI-RS资源时,第一CSI包括目标CSI-RS资源指示(CSI-RS Resource Indicator,简称CRI)或第一CSI包括目标CRI和预编码矩阵指示(Precoding Matrix Indication,简称PMI),目标CRI为K份CSI-RS资源的K个CRI中的一个;当第一CSI-RS资源为N个CSI-RS端口时,第一CSI包
括PMI。
其中,K份CSI-RS资源与K个CRI一一对应,示例性的,如图3所示,当K=2时,2份CSI-RS资源中的第1份CSI-RS资源对应的资源指示可以为A1,2份CSI-RS资源中的第2份CSI-RS资源对应的资源指示可以为A2。
目标CRI可以为基站根据第一CSI-RS测量得到的K份CSI-RS资源中的最优的一份CSI-RS资源的CRI。
203、UE向基站发送第一CSI。
204、基站接收UE发送的第一CSI,并根据第一CSI确定第二CSI-RS资源。
其中,第二CSI-RS资源包括X个CSI-RS端口。
当第一CSI-RS资源为K份CSI-RS资源时,K份CSI-RS资源包括M个CSI-RS端口,M为大于1的整数,X为大于等于1小于M的整数;当第一CSI-RS资源为N个CSI-RS端口时,N为大于1的整数,X为大于等于1的整数,具体的,X可以为小于N的整数,也可以为等于N的整数。
可选的,第二CSI-RS资源为资源集合中的一组或多组资源,资源集合为基站配置的资源集合。该情况下,步骤204在具体实现时可以为:基站接收UE发送的第一CSI,并根据第一CSI在资源集合中确定第二CSI-RS资源。
可选的,资源集合可以被多个UE共享,这样基站就不需要为每个UE都配置一个单独的资源集合,能够节约资源。
当第一CSI-RS资源不同时,基站确定第二CSI-RS资源的方法也不同,具体的,当所述第一CSI-RS资源为K份CSI-RS资源、且所述第一CSI包括所述目标CRI时,步骤204在具体实现时可以包
括:基站根据K份CSI-RS资源的K个CRI与资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数。
其中,K份CSI-RS资源的K个CRI与资源集合中的R组资源存在预设的对应关系,K可以小于R,大于R或等于R,基于图3所述的示例,如图4所示,当R=4时,A1可以对应资源集合中的资源(1)和资源(2),A2可以对应资源集合中的资源(3)和资源(4)。该情况下,当第一CSI为A1时,基站确定的第二CSI-RS资源为资源集合中的资源(1)和资源(2)。
当R=K时,资源集合中的R组资源也可以为K份CSI-RS资源。
另外,当第一CSI-RS资源为K份CSI-RS资源,第一CSI包括目标CRI的基础上,还可以包括PMI时,该情况下,可以提前预设目标CRI和PMI的值的组合对应资源集合中的CSI-RS资源,当基站需要确定第二CSI-RS资源时,可以根据目标CRI和PMI的值的组合与资源集合中的CSI-RS资源之间的对应关系确定第二CSI-RS资源。
当所述第一CSI-RS资源为N个CSI-RS端口时,步骤204在具体实现时可以包括:基站根据PMI的值与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数。
该情况下,可以使得PMI的值与资源集合中的R组资源存在预设的对应关系,该情况下的示例可参见下文中的描述。、
205、基站在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,第二CSI-RS为波束赋形的CSI-RS。
其中,第二发送时间点在第一发送时间点之后。
在本发明实施例中,若小区中的多个UE上报的目标CRI为同一CRI时,基站在第二发送时间点在第二CSI-RS资源上向该多个
UE发送同一个第二CSI-RS。
206、UE在第二接收时间点接收基站在第二CSI-RS资源上发送的第二CSI-RS,并根据第二CSI-RS测量第二CSI。
第二CSI可以包括秩指示(Rank Indication,简称RI)、第二PMI(为了与本文中其他处提到的PMI进行区分,此处称为第二PMI)、信道质量指示(Channel Quality Indication,简称CQI)以及信道的秩(Rank)等。
具体的,UE测得第二CSI后可以向基站反馈,基站根据第二CSI可以确定数据和解调参考符号(DeModulation Reference Signal,简称DMRS)的预编码矩阵,以及数据的调制编码方案(Modulation and Coding Scheme,简称MCS)。
本发明实施例中,基站可以在一个CSI进程中发送第一CSI-RS和第二CSI-RS,也可以配置两个CSI进程分别发送第一CSI-RS和第二CSI-RS。
可选的,该方法还可以包括:当基站在第二发送时间点确定需要向UE发送物理下行共享信道(Physical Downlink Shared Channel,简称PDSCH)数据时,基站在第二发送时间点在资源集合中的空闲的CSI-RS资源上向UE发送PDSCH数据。资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源。
进一步的,该方法还可以包括:基站在第二发送时间点向UE发送指示信息,指示信息用于指示资源集合中的用于传输PDSCH数据的CSI-RS资源,指示信息承载在物理下行控制信道(Physical Downlink Control Channel,简称PDCCH)中;UE在第二接收时间点接收基站发送的指示信息;UE根据指示信息确定资源集合中的用
于传输PDSCH数据的CSI-RS资源;UE在资源集合中的用于传输PDSCH数据的CSI-RS资源上获取PDSCH数据。
需要说明的是,若小区中只有一个UE,基于图4所述的示例,若基站确定在第二发送时间点在所述第二CSI-RS资源发送第二CSI-RS时,资源集合中的空闲的CSI-RS资源即资源(3)和资源(4);当基站确定不在第二发送时间点在所述第二CSI-RS资源发送第二CSI-RS时,资源集合中的空闲的CSI-RS资源即资源(1)、资源(2)、资源(3)和资源(4)。
需要说明的是,资源集合中的除第二CSI-RS资源之外的资源中,有些资源可能被其他UE使用,因此,基站需要通过指示信息指示资源集合中的传输PDSCH数据的CSI-RS资源,以便UE在该CSI-RS资源上获取PDSCH数据。
通过在资源集合中的空闲资源上发送PDSCH数据,提高了资源集合中的资源的利用率。
具体的,资源集合为多个UE共享,则基站可以在公共控制信道发送指示信息,以便多个UE通过公共控制信道获取该指示信息,基站可以将指示信息包含在下行控制信令中,具体的,可以在下行控制信令中,增加多个比特指示当前子帧对应的资源集合中用于传输PDSCH数据的资源。
示例性的,当资源集合中包括R组资源时,可以采用R个比特指示当前子帧对应的资源集合中的用于传输PDSCH数据的资源,一个比特用于指示资源集合中的一组资源是否被用于传输PDSCH数据。例如,基站可以在下行控制信息(Downlink Control information,简称DCI)第三种格式(format3)中增加R个比特用于指示当前子帧的资源集合中的用于传输PDSCH的资源,该DCI可以被小区内所有用户或者部分UE识别,UE识别出的数据可以用于对PDSCH数
据进行解调。
本发明实施例提供的方法,基站在第一发送时间点在第一CSI-RS资源上发送第一CSI-RS之后,UE根据第一CSI-RS测量第一CSI并向基站反馈,基站根据第一CSI确定第二CSI-RS资源,并在第二CSI-RS资源上向UE发送第二CSI-RS,当第二CSI-RS资源包含的CSI-RS端口数小于K份CSI-RS资源包含的CSI-RS端口数或者N的值设置的较小(第一CSI-RS资源为N个CSI-RS端口的情况下)时,基站不需要在过多的端口上发送第二CSI-RS,因此,能够节约CSI-RS资源,提高CSI-RS资源的利用率。
本发明实施例还提供一种传输CSI-RS的方法,该实施例以第一CSI-RS资源为K份CSI-RS资源为例对上述方法进行示例性说明,如图5所示,该方法包括:
501、基站为UE配置一个CSI进程。
该CSI进程中采用第一种方式和第二种方式发送波束赋形的CSI-RS,其中,第一种方式发送的CSI-RS即第一CSI-RS,第二种方式发送的CSI-RS即第二CSI-RS。该实施例中,基站在一个CSI进程中发送第一CSI-RS和第二CSI-RS。
基站为UE配置CSI进程时,需要配置的参数包括:第一CSI-RS资源和基站发送第一CSI-RS的第一发送周期。
502、基站在第一发送时间点在第一CSI-RS资源上向UE发送第一CSI-RS。
其中,基站以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间。
示例性的,如图6所示,第一发送周期可以为T4,第一发送时间点可以为t1或t2。
该实施例中,第一CSI-RS资源为K份CSI-RS资源,K份CSI-RS资源即基站发送第一CSI-RS的时频资源,K份CSI-RS资源可以由基站预设,第一CSI-RS为K份波束赋形的CSI-RS。
503、UE在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS,并根据第一CSI-RS测量目标CRI。
其中,UE在一个CSI进程中接收第一CSI-RS和第二CSI-RS,UE以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间。
其中,目标CRI可以为K份CSI-RS资源中的最优的一份CSI-RS资源的CRI,K份CSI-RS资源中的最优的一份CSI-RS资源可以为K份CSI-RS资源中的功率最大的一份CSI-RS资源或K份CSI-RS资源中的信噪比最大的一份CSI-RS资源或K份CSI-RS资源中的吞吐率最大的一份CSI-RS资源。
504、UE向基站发送目标CRI。
505、基站接收UE发送的目标CRI,并根据目标CRI确定第二CSI-RS资源。
具体的,第二CSI-RS资源即发送第二CSI-RS的时频资源,第二CSI-RS资源为资源集合中的一组或多组资源,基站根据目标CRI确定第二CSI-RS资源的方法可以参见上述实施例,在此不再赘述。
在步骤505之后,基站需要在第二CSI-RS资源上发送第二CSI-RS,具体的,可以通过两种方式实现,一种实现方式为第二CSI-RS周期性发送,该种实现方式下步骤505之后执行步骤
506-507,另一种实现方式为第二CSI-RS触发式发送,该种实现方式下步骤505之后执行步骤508-509。
506、基站在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,第二CSI-RS为波束赋形的CSI-RS。
其中,在第一发送时间点所属的第一发送周期内,基站以第二发送周期为周期,周期性的在第二CSI-RS资源上向UE发送第二CSI-RS,第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
示例性的,如图6所示,第二发送周期可以为T5,第一发送时间点为t1时,第二发送时间点可以为t3或t4。
该种实现方式下,基站可以在每个第一发送周期的起始时刻在K个CSI-RS资源上发送K份波束赋形的CSI-RS,在每个第二发送周期的起始时刻在第二CSI-RS资源上发送第二CSI-RS,其中,在第二发送周期发送第二CSI-RS的资源位置(即第二CSI-RS资源)由基站根据UE反馈的目标CRI确定,该目标CRI为UE根据基站在该第二发送周期所属的第一发送周期的起始时刻发送的第一CSI-RS测量得到的CRI。
该种实现方式下,基站为UE配置CSI进程时,需要配置的参数还包括:第二CSI-RS的第二发送周期,其中,第二发送周期为基站在每个第一发送周期内的发送第二CSI-RS的周期。
该种实现方式下,该方法还包括:基站向UE发送配置信息,配置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期;UE接收基站发送的配置信息;UE根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期。
507、UE在第二接收时间点接收基站在第二CSI-RS资源上发送的第二CSI-RS,并根据第二CSI-RS测量第二CSI。
在第二接收时间点所属的第一接收周期内,UE以第二接收周期为周期,周期性的接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
508、基站确定是否在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,若是,基站在第三发送时间点向UE发送触发信息并在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS。
其中,触发信息用于触发UE根据第二CSI-RS测量第二CSI,第三发送时间点为第二发送时间点或第三发送时间点在第一发送时间点和第二发送时间点之间,其中,第二发送时间点位于第一发送时间点所属的第一发送周期内。
具体的,基站可以通过确定是否需要与UE之间传输数据确定是否发送第二CSI-RS,当基站确定需要与UE之间传输数据时,基站确定需要发送第二CSI-RS,以便基站根据UE反馈第二CSI确定信道质量。
示例性的,如图7所示,基站可以在每个T4的起始时刻在K份CSI-RS资源上发送第一CSI-RS,在某个需要发送第二CSI-RS的时刻在第二CSI-RS资源上发送第二CSI-RS,例如,在t3在第二CSI-RS资源上发送第二CSI-RS。图6和图7中均以K=3、一份CSI-RS资源包括4个CSI-RS端口、第二CSI-RS资源包括4个CSI-RS端口为例进行绘制。
该种实现方式下,该方法还包括:基站向UE发送配置信息,配
置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置和第一发送周期;UE接收基站发送的配置信息;UE根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置和第一发送周期。
需要说明的是,在该种实现方式中,在每个第一发送周期内,基站确定第二CSI-RS资源之后,可以周期性的检测是否需要发送第二CSI-RS,若确定需要发送第二CSI-RS,则在当前子帧(该情况下,第二发送时间点为当前子帧的起始时间)或下一子帧(该情况下,第二发送时间点为下一子帧的起始时间)发送第二CSI-RS;基站也可以配置第二发送周期,基站在每个第二发送周期之前确定是否在该第二发送周期发送第二CSI-RS,若确定发送第二CSI-RS时,基站在该第二发送周期的起始时刻(即第二发送时间点)发送第二CSI-RS。
509、UE在第三接收时间点接收基站发送的触发信息,在触发信息的触发下在第二接收时间点获取第二CSI-RS,并根据第二CSI-RS测量第二CSI。
其中,第三接收时间点为第二接收时间点或第三接收时间点在第一接收时间点和第二接收时间点之间。
在本发明实施例提供的上述方法的基础上,可选的,该方法还可以包括:当基站在第二发送时间点确定需要向UE发送PDSCH数据时,基站在第二发送时间点在资源集合中的空闲的CSI-RS资源上向UE发送PDSCH数据。资源集合中的空闲的CSI-RS资源是指资源集合中的未用于发送第二CSI-RS的CSI-RS资源。
进一步的,该方法还可以包括:基站在第二发送时间点向UE发送指示信息,指示信息用于指示资源集合中的用于传输PDSCH数据的CSI-RS资源,指示信息承载在PDCCH中;UE在第二接收时
间点接收基站发送的指示信息;UE根据指示信息确定资源集合中的用于传输PDSCH数据的CSI-RS资源;UE在资源集合中的用于传输PDSCH数据的CSI-RS资源上获取PDSCH数据。
需要说明的是,资源集合中的除第二CSI-RS资源之外的资源中,有些资源可能被其他UE使用,因此,基站需要通过指示信息指示资源集合中的传输PDSCH数据的CSI-RS资源,以便UE在该CSI-RS资源上获取PDSCH数据。
通过在资源集合中的空闲资源上发送PDSCH数据,提高了资源集合中的资源的利用率。
具体的,资源集合为多个UE共享,则基站可以在公共控制信道发送指示信息,以便多个UE通过公共控制信道获取该指示信息,基站可以将指示信息包含在下行控制信令中,具体的,可以在下行控制信令中,增加多个比特指示当前子帧对应的资源集合中用于传输PDSCH数据的资源。
示例性的,当资源集合中包括R组资源时,可以采用R个比特指示当前子帧对应的资源集合中的用于传输PDSCH数据的资源,一个比特用于指示资源集合中的一组资源是否被用于传输PDSCH数据。例如,基站可以在DCI format3中增加R个比特用于指示当前子帧的资源集合中的用于传输PDSCH的资源,该DCI可以被小区内所有用户或者部分UE识别,UE识别出的数据可以用于对PDSCH数据进行解调。
需要说明的是,由于在一个第一发送周期内,基站只确定一次第二CSI-RS资源,因此,在一个第一发送周期内,基站可以只发送一次指示信息,向UE指示整个该第一发送周期内的资源集合中的空闲的CSI-RS资源,降低信令开销。
本发明实施例提供的方法,基站在第一发送时间点在K份CSI-RS资源上发送第一CSI-RS之后,UE根据第一CSI-RS测量目标CRI并向基站反馈,基站根据目标CRI确定第二CSI-RS资源,并在第二CSI-RS资源上向UE发送第二CSI-RS,而不需要在K份CSI-RS资源上测量,由于第二CSI-RS资源包含的CSI-RS端口数小于K份CSI-RS资源包含的CSI-RS端口数,因此,能够节约CSI-RS资源,提高CSI-RS资源的利用率。
本发明实施例还提供一种传输CSI-RS的方法,该实施例以第一CSI-RS资源为N个CSI-RS端口为例对实施例一提供的方法进行示例性说明,如图8所示,该方法包括:
801、基站为UE配置一个CSI进程。
该CSI进程中采用第三种方式和第二种方式发送CSI-RS的方式发送CSI-RS,其中,第三种方式发送的未波束赋形的CSI-RS即第一CSI-RS,第二种方式发送的波束赋形的CSI-RS即第二CSI-RS。该实施例中,基站在一个CSI进程中发送第一CSI-RS和第二CSI-RS。
基站为UE配置CSI进程时,需要配置的参数包括:第一CSI-RS资源和基站发送第一CSI-RS的第一发送周期。
802、基站在第一发送时间点在第一CSI-RS资源上向UE发送第一CSI-RS。
其中,基站以第一发送周期为周期,周期性的在第一CSI-RS资源上向UE发送第一CSI-RS,第一发送时间点为一个第一发送周期的起始时间。
示例性的,如图9所示,第一发送周期可以为T6,第一发送时
间点可以为t1或t2。
该实施例中,第一CSI-RS资源为N个CSI-RS端口,N个CSI-RS端口即基站发送第一CSI-RS的时频资源,N个CSI-RS端口可以由基站预设,第一CSI-RS为未波束赋形的CSI-RS。
803、UE在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS,并根据第一CSI-RS测量PMI。
其中,UE在一个CSI进程中接收第一CSI-RS和第二CSI-RS,UE以第一接收周期为周期,周期性的接收基站在第一CSI-RS资源上发送的第一CSI-RS,第一接收时间点为一个第一接收周期的起始时间。
在LTE的Rel-13的PMI定义中,PMI1用于指示一个波束向量组,PMI2用于指示在PMI1指示的波束向量组中选择的波束矢量以及两个极化方向之间的相位补偿因子。在LTE的Rel-13中引入了2D天线形态后,PMI1可以进一步分为PMI1.1和PMI1.2,PMI1.1指示垂直维度的波束向量组,PMI1.2指示水平维度的波束向量组,PMI2用于在PMI1的向量组中选择垂直维度和水平维度的波束向量以及两个极化方向之间的相位补偿因子。
UE测量的PMI包括PMI1或PMI1.1或PMI1.2。
804、UE向基站发送PMI。
805、基站接收UE发送的PMI,并根据PMI确定第二CSI-RS资源。
具体的,第二CSI-RS资源即发送第二CSI-RS的时频资源,第二CSI-RS资源为资源集合中的一组或多组资源。
具体的,PMI的值与资源集合中的资源存在预设的对应关系,基站可以根据该预设的对应关系确定第二CSI-RS资源。示例性的,
可以根据PMI1或PMI1.1或PMI1.2中指示的波束向量组确定第二CSI-RS资源,例如,UE反馈的PMI1指示其选择的波束向量组分别是水平方向第一个波束向量组,垂直方向第一个波束向量组,则与该PMI1的值相关联的第二CSI-RS资源可以为资源集合中的第一组资源。
在步骤805之后,基站需要在第二CSI-RS资源上发送第二CSI-RS,具体的,可以通过两种方式实现,一种实现方式为第二CSI-RS周期性发送,该种实现方式下步骤805之后执行步骤806-807,另一种实现方式为第二CSI-RS触发式发送,该种实现方式下步骤805之后执行步骤808-809。
806、基站在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,第二CSI-RS为波束赋形的CSI-RS。
其中,在第一发送时间点所属的第一发送周期内,基站以第二发送周期为周期,周期性的在第二CSI-RS资源上向UE发送第二CSI-RS,第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
示例性的,如图9所示,第二发送周期可以为T7,第一发送时间点为t1时,第二发送时间点可以为t3或t4。
该种实现方式下,基站可以在每个第一发送周期的起始时刻在N个CSI-RS端口上发送第一CSI-RS,在每个第二发送周期的起始时刻在第二CSI-RS资源上发送第二CSI-RS,其中,在第二发送周期发送第二CSI-RS的资源位置(即第二CSI-RS资源)由基站根据UE反馈的PMI确定,该PMI为UE根据基站在该第二发送周期所属的第一发送周期的起始时刻发送的第一CSI-RS测量得到的PMI。
该种实现方式下,基站为UE配置CSI进程时,需要配置的参
数还包括:第二CSI-RS的第二发送周期,其中,第二发送周期为基站在每个第一发送周期内的发送第二CSI-RS的周期。
该种实现方式下,该方法还包括:基站向UE发送配置信息,配置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期;UE接收基站发送的配置信息;UE根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置、第一发送周期和第二发送周期。
807、UE在第二接收时间点接收基站在第二CSI-RS资源上发送的第二CSI-RS,并根据第二CSI-RS测量第二CSI。
在第二接收时间点所属的第一接收周期内,UE以第二接收周期为周期,周期性的接收基站在第二CSI-RS资源上发送的第二CSI-RS,第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
808、基站确定是否在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS,若是,基站在第三发送时间点向UE发送触发信息并在第二发送时间点在第二CSI-RS资源上向UE发送第二CSI-RS。
其中,关于该步骤的相关描述可以参见步骤508,在此不再赘述。
示例性的,如图10所示,基站可以在每个T6的起始时刻在N个CSI-RS端口上发送第一CSI-RS,在某个需要发送第二CSI-RS的时刻在第二CSI-RS资源上发送第二CSI-RS,例如,在t3在第二CSI-RS资源上发送第二CSI-RS。图9和图10中均以N=16、第二CSI-RS资源包括4个CSI-RS端口为例进行绘制。
该种实现方式下,该方法还包括:基站向UE发送配置信息,配置信息中包括资源集合中的资源的位置、第一CSI-RS资源的位置和
第一发送周期;UE接收基站发送的配置信息;UE根据配置信息确定资源集合中的资源的位置、第一CSI-RS资源的位置和第一发送周期。
需要说明的是,在该种实现方式中,在每个第一发送周期内,基站确定第二CSI-RS资源之后,可以周期性的检测是否需要发送第二CSI-RS,若确定需要发送第二CSI-RS,则在当前子帧(该情况下,第二发送时间点为当前子帧的起始时间)或下一子帧(该情况下,第二发送时间点为下一子帧的起始时间)发送第二CSI-RS;基站也可以配置第二发送周期,基站在每个第二发送周期之前确定是否在该第二发送周期发送第二CSI-RS,若确定发送第二CSI-RS时,基站在该第二发送周期的起始时刻(即第二发送时间点)发送第二CSI-RS。
809、UE在第三接收时间点接收基站发送的触发信息,在触发信息的触发下在第二接收时间点获取第二CSI-RS,并根据第二CSI-RS测量第二CSI。
其中,第三接收时间点为第二接收时间点或第三接收时间点在第一接收时间点和第二接收时间点之间。
在本发明实施例提供的上述方法的基础上,可选的,该方法还可以包括:当基站在第二发送时间点确定需要向UE发送PDSCH数据时,基站在第二发送时间点在资源集合中的空闲的CSI-RS资源上向UE发送PDSCH数据。
进一步的,该方法还可以包括:基站在第二发送时间点向UE发送指示信息,指示信息用于指示资源集合中的用于传输PDSCH数据的CSI-RS资源,指示信息承载在PDCCH中;UE在第二接收时间点接收基站发送的指示信息;UE根据指示信息确定资源集合中的用于传输PDSCH数据的CSI-RS资源;UE在资源集合中的用于传输
PDSCH数据的CSI-RS资源上获取PDSCH数据。
通过在资源集合中的空闲资源上发送PDSCH数据,提高了资源集合中的资源的利用率。
具体的,资源集合为多个UE共享,则基站可以在公共控制信道发送指示信息,以便多个UE通过公共控制信道获取该指示信息,基站可以将指示信息包含在下行控制信令中,具体的,可以在下行控制信令中,增加多个比特指示当前子帧对应的资源集合中用于传输PDSCH数据的资源。关于该可选的方法的其他相关描述及示例均可以参见上一实施例中的相关内容,在此不再赘述。
本发明实施例提供的方法,基站在第一发送时间点在N个CSI-RS端口上发送第一CSI-RS之后,UE根据第一CSI-RS测量PMI并向基站反馈,基站根据PMI确定第二CSI-RS资源,并在第二CSI-RS资源上向UE发送第二CSI-RS,在第二CSI-RS资源包含的CSI-RS端口数小于N的情况下,基站不需要在N个CSI-RS端口上发送第二CSI-RS,能够节约CSI-RS资源;另一种情况下,现有技术中在发送未波束赋形的CSI-RS时,是在16个CSI-RS端口上发送,本发明实施例中,可以将N的值设置的小于16,这样基站就不需要在16个CSI-RS端口上发送第二CSI-RS,同样可以起到节约CSI-RS资源,提高资源利用率的目的。
在本发明实施例中,UE中的各个接收周期(或接收时间点)可以根据基站发送第一CSI-RS的周期(或发送时间点)和发送第二CSI-RS的周期(或发送时间点)采用现有技术中的方法进行配置,在此不再详述。本发明实施例中的图1、图3-图4、图6-图7、图9-图10中的填充圆均指CSI-RS端口,图中各个资源中包含的CSI-RS端口个数也是示例性绘制,并不代表本发明实施例提供的方法在具体执行时资源中包含的CSI-RS端口个数必须要与附图中一致。
本发明实施例还提供了一种基站110,如图11所示,该基站110包括:
发送单元1101,用于在第一发送时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;
接收单元1102,用于接收所述UE发送的第一信道状态信息CSI,所述第一CSI为所述UE根据所述第一CSI-RS测量得到的CSI;
确定单元1103,用于根据所述第一CSI确定第二CSI-RS资源;
所述发送单元1101,还用于在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二发送时间点在所述第一发送时间点之后;
其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CSI-RS资源指示CRI和预编码矩阵指示PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;
或者,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
可选的,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
可选的,当所述第一CSI-RS资源为K份CSI-RS资源、且所述第一CSI包括所述目标CRI时,所述确定单元1103,具体用于根据所述K份CSI-RS资源的K个CRI与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数;
当所述第一CSI-RS资源为N个CSI-RS端口时,所述确定单元1103,具体用于根据所述PMI的值与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数。
可选的,所述发送单元1101在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述发送单元1101以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个所述第一发送周期的起始时间,在该第一发送周期内,所述发送单元1101以第二发送周期为周期,周期性的在所述第二CSI-RS资源上向所述UE发送所述第二CSI-RS,所述第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
可选的,所述发送单元1101在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述发送单元1101以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,所述确定单元1103,还用于确定是否在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS;
若是,所述发送单元1101在第三发送时间点向所述UE发送触发信息并在所述第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述触发信息用于触发所述UE根据所述第二CSI-RS测量第二CSI,所述第三发送时间点为所述第二发送时间点或所述第三发送时间点在所述第一发送时间点和所述第二发送时间点之间,所述第二发送时间点位于该第一发送周期内。
可选的,当所述确定单元1103在所述第二发送时间点确定需要向所述UE发送物理下行共享信道PDSCH数据时,所述发送单元1101,还用于在所述第二发送时间点在所述资源集合中的空闲的
CSI-RS资源上向所述UE发送PDSCH数据。
可选的,所述发送单元1101,还用于:
在第二发送时间点向所述UE发送指示信息,所述指示信息用于指示所述资源集合中的用于传输PDSCH数据的CSI-RS资源,所述指示信息承载在物理下行控制信道PDCCH中。
可选的,所述资源集合被多个UE共享。
可选的,所述发送单元1101,具体用于:在第二发送时间点在公共控制信道向所述多个UE发送指示信息。
可选的,所述发送单元1101,还用于:向所述UE发送配置信息,所述配置信息中包括所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、所述第一发送周期和所述第二发送周期。
本发明实施例中提供的基站中的各个单元执行的动作与本发明实施例提供的方法一致,因此,本发明实施例中的基站的有益效果可参见本发明实施例中的方法中所述的有益效果,此处不再赘述。
本发明实施例还提供了一种基站120,如图12所示,基站120包括:发送器1201、接收器1202、存储器1203和处理器1204;
其中,发送器1201、接收器1202、存储器1203和处理器1204之间是通过总线***1205耦合在一起的,其中存储器1203可能包含随机存取存储器,也可能还包括非易失性存储器,例如至少一个磁盘存储器。总线***1205,可以是工业标准体系结构(Industry Standard Architecture,简称ISA)总线、外部设备互连(Peripheral Component,简称PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture,简称EISA)总线等。该总线***1205可以分为地址总线、数据总线、控制总线等。为便于表示,图12中
仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
所述发送器1201,用于在第一发送时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;
所述接收器1202,用于接收所述UE发送的第一信道状态信息CSI,所述第一CSI为所述UE根据所述第一CSI-RS测量得到的CSI;
所述存储器1203用于存储代码,所述处理器1204根据所述代码执行以下动作:根据所述第一CSI确定第二CSI-RS资源;
所述发送器1201,还用于在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二发送时间点在所述第一发送时间点之后;
其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CSI-RS资源指示CRI和预编码矩阵指示PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;
或者,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
可选的,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
可选的,当所述第一CSI-RS资源为K份CSI-RS资源、且所述第一CSI包括所述目标CRI时,所述处理器1204,具体用于:根据所述K份CSI-RS资源的K个CRI与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数;
当所述第一CSI-RS资源为N个CSI-RS端口时,所述处理器1204,具体用于:根据所述PMI的值与所述资源集合中的R组资源
的对应关系确定所述第二CSI-RS资源,R为大于1的整数。
可选的,所述发送器1201在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述发送器1201以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个所述第一发送周期的起始时间,在该第一发送周期内,所述发送器1201以第二发送周期为周期,周期性的在所述第二CSI-RS资源上向所述UE发送所述第二CSI-RS,所述第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
可选的,所述发送器1201在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述发送器1201以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,
所述处理器1204还用于确定是否在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,若是,所述发送器1201在第三发送时间点向所述UE发送触发信息并在所述第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述触发信息用于触发所述UE根据所述第二CSI-RS测量第二CSI,所述第三发送时间点为所述第二发送时间点或所述第三发送时间点在所述第一发送时间点和所述第二发送时间点之间,所述第二发送时间点位于该第一发送周期内。
可选的,当所述处理器1204在所述第二发送时间点确定需要向所述UE发送物理下行共享信道PDSCH数据时,所述发送器1201在所述第二发送时间点在所述资源集合中的空闲的CSI-RS资源上向所述UE发送PDSCH数据。
可选的,所述发送器1201还用于:在第二发送时间点向所述UE发送指示信息,所述指示信息用于指示所述资源集合中的用于传输PDSCH数据的CSI-RS资源,所述指示信息承载在物理下行控制信道PDCCH中。
可选的,所述资源集合被多个UE共享。
可选的,所述发送器1201具体用于:在第二发送时间点在公共控制信道向所述多个UE发送指示信息。
可选的,所述发送器1201还用于:向所述UE发送配置信息,所述配置信息中包括所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、所述第一发送周期和所述第二发送周期。
需要说明的是,在一个实施例中,发送器1201、接收器1202和处理器1204用于执行上述实施例所述的方法,具体的,发送器1201用于执行基于图2所示的方法中的步骤201和步骤205、接收器1202用于执行基于图2所示的方法中的步骤204,处理器1204用于执行基于图2所示的方法中的步骤204;发送器1201还用于执行基于图5所示的方法中的步骤502、步骤506和步骤508,接收器1202还用于执行基于图5所示的方法中的步骤505,处理器1204还用于执行基于图5所示的方法中的步骤501、步骤505和步骤508;发送器1201还用于执行基于图8所示的方法中的步骤802、步骤806和步骤808,接收器1202用于执行基于图8所示的方法中的步骤805,处理器1204还用于执行基于图8所示的方法中的步骤801、步骤805和步骤808。
本发明实施例中提供的基站中的各个器件执行的动作与本发明实施例提供的方法一致,因此,本发明实施例中的基站的有益效果可参见本发明实施例中的方法中所述的有益效果,此处不再赘述。
其中,发送单元1101可以为发送器1201,接收单元1102可以为接收器1202,确定单元1103可以为处理器1204。
在硬件实现上,基站110中的发送单元1101和基站120中的发送器1201可以为基站的发射机,基站110中的接收单元1102和基站120中的接收器1202可以为基站的接收机,基站110中的其他单元可以以硬件形式内嵌于或独立于基站的处理器1204中,也可以以软件形式存储于基站的存储器1203中,以便于处理器1204调用执行以上各个单元对应的操作,该处理器可以为中央处理器(Central Processing Unit,简称CPU)、特定集成电路(Application Specific Integrated Circuit,简称ASIC)或者是被配置成实施本发明实施例的一个或多个集成电路。
本发明实施例还提供了一种UE130,如图13所示,UE130包括:
接收单元1301,用于在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;
测量单元1302,用于根据所述第一CSI-RS测量第一CSI;
发送单元1303,用于向所述基站发送所述第一CSI;
所述接收单元1301,还用于在第二接收时间点接收所述基站在第二CSI-RS资源上发送的第二CSI-RS,所述第二CSI-RS资源为所述基站根据所述第一CSI确定的发送所述第二CSI-RS的资源,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二接收时间点在所述第一接收时间点之后;
所述测量单元1302,还用于根据所述第二CSI-RS测量第二CSI;
其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CRI和
PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;或,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
可选的,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
可选的,所述接收单元1301在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述接收单元1301以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,所述接收单元1301以第二接收周期为周期,周期性的接收所述基站在所述第二CSI-RS资源上发送的第二CSI-RS,所述第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
可选的,所述接收单元1301在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述接收单元1301以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,
所述接收单元1301在第三接收时间点接收所述基站发送的触发信息,所述第三接收时间点为所述第二接收时间点或所述第三接收时间点在所述第一接收时间点和所述第二接收时间点之间,所述第二接收时间点位于该第一接收周期内;
所述测量单元1302在所述触发信息的触发下获取所述第二CSI-RS,并根据所述第二CSI-RS测量第二CSI。
可选的,所述接收单元1301,还用于:
在第二接收时间点接收所述基站发送的指示信息,所述指示信息承载在PDCCH中;
如图13所示,所述UE还包括确定单元1304,所述确定单元1304,用于根据所述指示信息确定所述资源集合中的用于传输PDSCH数据的CSI-RS资源;
如图13所示,所述UE还包括获取单元1305,所述获取单元1305,用于在所述资源集合中的用于传输PDSCH数据的CSI-RS资源上获取所述PDSCH数据。
可选的,所述资源集合被多个UE共享。
可选的,所述接收单元1301,具体用于:在第二接收时间点在公共控制信道接收所述基站发送的指示信息。
可选的,所述接收单元1301,还用于:
接收所述基站发送的配置信息;
所述确定单元1304,还用于根据所述配置信息确定所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、第一发送周期和第二发送周期,所述第一发送周期为所述基站向所述UE发送所述第一CSI-RS的周期,所述第二发送周期为在一个第一发送周期内所述基站向所述UE发送所述第二CSI-RS的周期。
本发明实施例中提供的UE中的各个单元执行的动作与本发明实施例提供的方法一致,因此,本发明实施例中的UE的有益效果可参见本发明实施例中的方法中所述的有益效果,此处不再赘述。
本发明实施例还提供了一种UE140,如图14所示,UE140包括:
接收器1401、存储器1402、处理器1403和发送器1404;
其中,接收器1401、存储器1402、处理器1403和发送器1404之间是通过总线***1405耦合在一起的,其中存储器1402可能包含随机存取存储器,也可能还包括非易失性存储器,例如至少一个磁盘存储器。总线***1405,可以是ISA总线、PCI总线或EISA总线等。该总线***1405可以分为地址总线、数据总线、控制总线等。为便于表示,图14中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
所述接收器1401,用于在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;
所述存储器1402用于存储代码,所述处理器1403根据所述代码执行以下动作:根据所述第一CSI-RS测量第一CSI;
所述发送器1404,用于向所述基站发送所述第一CSI;
所述接收器1401,还用于在第二接收时间点接收所述基站在第二CSI-RS资源上发送的第二CSI-RS,所述第二CSI-RS资源为所述基站根据所述第一CSI确定的发送所述第二CSI-RS的资源,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二接收时间点在所述第一接收时间点之后;
所述处理器1403,还用于根据所述第二CSI-RS测量第二CSI;
其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CRI和PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;或,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1
的整数。
可选的,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
可选的,所述接收器1401在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述接收器1401以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,所述接收器1401以第二接收周期为周期,周期性的接收所述基站在所述第二CSI-RS资源上发送的第二CSI-RS,所述第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
可选的,所述接收器1401在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述接收器1401以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,
所述接收器1401还用于:在第三接收时间点接收所述基站发送的触发信息,所述第三接收时间点为所述第二接收时间点或所述第三接收时间点在所述第一接收时间点和所述第二接收时间点之间,所述第二接收时间点位于该第一接收周期内;
所述处理器1403,具体用于在所述触发信息的触发下获取所述第二CSI-RS,并根据所述第二CSI-RS测量第二CSI。
可选的,所述接收器1401还用于,在第二接收时间点接收所述基站发送的指示信息,所述指示信息承载在PDCCH中;
所述处理器1403,还用于根据所述指示信息确定所述资源集合
中的用于传输PDSCH数据的CSI-RS资源;
所述处理器1403,还用于在所述资源集合中的用于传输PDSCH数据的CSI-RS资源上获取所述PDSCH数据。
可选的,所述资源集合被多个UE共享。
可选的,所述接收器1401具体用于:在第二接收时间点在公共控制信道接收所述基站发送的指示信息。
可选的,所述接收器1401,还用于接收所述基站发送的配置信息;所述处理器1403,还用于根据所述配置信息确定所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、第一发送周期和第二发送周期,所述第一发送周期为所述基站向所述UE发送所述第一CSI-RS的周期,所述第二发送周期为在一个第一发送周期内所述基站向所述UE发送所述第二CSI-RS的周期。
需要说明的是,在一个实施例中,接收器1401、发送器1404和处理器1403用于执行上述实施例所述的方法,具体的,接收器1401用于执行基于图2所示的方法中的步骤202和步骤206,处理器1403用于执行基于图2所示的方法中的步骤202和步骤206,发送器1404用于执行基于图2所示的方法中的步骤203;接收器1401用于执行基于图5所示的方法中的步骤503、步骤507和步骤509,处理器1403用于执行基于图5所示的方法中的步骤503、步骤507和步骤509,发送器1404用于执行基于图5所示的方法中的步骤504;接收器1401用于执行基于图8所示的方法中的步骤803、步骤807和步骤809,处理器1403用于执行基于图8所示的方法中的步骤803、步骤807和步骤809,发送器1404用于执行基于图8所示的方法中的步骤804。
本发明实施例中提供的UE中的各个器件执行的动作与本发明
实施例提供的方法一致,因此,本发明实施例中的UE的有益效果可参见本发明实施例中的方法中所述的有益效果,此处不再赘述。
其中,接收单元1301可以为接收器1401,发送单元1303可以为发送器1404,测量单元1302、确定单元1304和获取单元1305可以为处理器1403。
在硬件实现上,UE130中的接收单元1301和UE140中的接收器1401可以为射频(radio frequency,简称RF)电路,UE130中的其他单元可以以硬件形式内嵌于或独立于UE的处理器中,也可以以软件形式存储于UE的存储器中,以便于处理器调用执行以上各个单元对应的操作,该处理器可以为CPU、ASIC或者是被配置成实施本发明实施例的一个或多个集成电路。
在本申请所提供的几个实施例中,应该理解到,所揭露的装置和方法,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,所述模块的划分,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,例如多个模块或组件可以结合或者可以集成到另一个***,或一些特征可以忽略,或不执行。
所述作为分离部件说明的模块可以是或者也可以不是物理上分开的,作为模块显示的部件可以是或者也可以不是物理模块,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模块可以集成在一个处理模块中,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用硬件加软件功能模块的形式实现。
上述以软件功能模块的形式实现的集成的模块,可以存储在一个计算机可读取存储介质中。上述软件功能模块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(Read-Only Memory,简称ROM)、随机存取存储器(Random Access Memory,简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
Claims (36)
- 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:基站在第一发送时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;所述基站接收所述UE发送的第一信道状态信息CSI,所述第一CSI为所述UE根据所述第一CSI-RS测量得到的CSI;所述基站根据所述第一CSI确定第二CSI-RS资源;所述基站在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二发送时间点在所述第一发送时间点之后;其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CSI-RS资源指示CRI和预编码矩阵指示PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;或者,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
- 根据权利要求1所述的方法,其特征在于,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
- 根据权利要求2所述的方法,其特征在于,当所述第一CSI-RS资源为K份CSI-RS资源、且所述第一CSI包括所述目标CRI时,所述基站根据所述第一CSI确定第二CSI-RS资源,包括:所述基站根据所述K份CSI-RS资源的K个CRI与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数;当所述第一CSI-RS资源为N个CSI-RS端口时,所述基站根据所述第一CSI确定第二CSI-RS资源,包括:所述基站根据所述PMI的值与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数。
- 根据权利要求2或3所述的方法,其特征在于,所述基站在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述基站以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个所述第一发送周期的起始时间,在该第一发送周期内,所述基站以第二发送周期为周期,周期性的在所述第二CSI-RS资源上向所述UE发送所述第二CSI-RS,所述第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
- 根据权利要求2或3所述的方法,其特征在于,所述基站在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述基站以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,所述基站在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,包括:所述基站确定是否在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,若是,所述基站在第三发送时间点向所述UE发送触发信息并在所述第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述触发信息用于触发所述UE根据所述第二CSI-RS测量第二CSI,所述第三发送时间点为所述第二发送时间点或所述第三发送时间点在所述第一发送时间点和所述第二发送时间点之间,所述第二发送时间点位于该第一发送周期内。
- 根据权利要求2-5任一项所述的方法,其特征在于,所述方法还包括:当所述基站在所述第二发送时间点确定需要向所述UE发送物理下行共享信道PDSCH数据时,所述基站在所述第二发送时间点在所述资源集合中的空闲的CSI-RS资源上向所述UE发送PDSCH数据。
- 根据权利要求6所述的方法,其特征在于,所述方法还包括:所述基站在第二发送时间点向所述UE发送指示信息,所述指示信息用于指示所述资源集合中的用于传输PDSCH数据的CSI-RS资源,所述指示信息承载在物理下行控制信道PDCCH中。
- 根据权利要求7所述的方法,其特征在于,所述资源集合被多个UE共享。
- 根据权利要求8所述的方法,其特征在于,所述基站在第二发送时间点向所述UE发送指示信息,包括:所述基站在第二发送时间点在公共控制信道向所述多个UE发送指示信息。
- 根据权利要求4所述的方法,其特征在于,所述方法还包括:所述基站向所述UE发送配置信息,所述配置信息中包括所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、所述第一发送周期和所述第二发送周期。
- 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:用户设备UE在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;所述UE根据所述第一CSI-RS测量第一信道状态信息CSI;所述UE向所述基站发送所述第一CSI;所述UE在第二接收时间点接收所述基站在第二CSI-RS资源上发送的第二CSI-RS,所述第二CSI-RS资源为所述基站根据所述第一CSI确定的发送所述第二CSI-RS的资源,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二接收时间点在所述第一接收时间点之后;所述UE根据所述第二CSI-RS测量第二CSI;其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CSI-RS资源指示CRI和预编码矩阵指示PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;或,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
- 根据权利要求11所述的方法,其特征在于,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
- 根据权利要求12所述的方法,其特征在于,所述UE在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述UE以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,所述UE以第二接收周期为周期,周期性的接收所述基站在所述第二CSI-RS资源上发送的第二CSI-RS,所述第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
- 根据权利要求12所述的方法,其特征在于,所述UE在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述UE以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,所述UE根据所述第二CSI-RS测量第二CSI,包括:所述UE在第三接收时间点接收所述基站发送的触发信息,所述第三接收时间点为所述第二接收时间点或所述第三接收时间点在所 述第一接收时间点和所述第二接收时间点之间,所述第二接收时间点位于该第一接收周期内;所述UE在所述触发信息的触发下获取所述第二CSI-RS,并根据所述第二CSI-RS测量第二CSI。
- 根据权利要求12-14任一项所述的方法,其特征在于,所述方法还包括:所述UE在第二接收时间点接收所述基站发送的指示信息,所述指示信息承载在物理下行控制信道PDCCH中;所述UE根据所述指示信息确定所述资源集合中的用于传输物理下行共享信道PDSCH数据的CSI-RS资源;所述UE在所述资源集合中的用于传输PDSCH数据的CSI-RS资源上获取所述PDSCH数据。
- 根据权利要求15所述的方法,其特征在于,所述资源集合被多个UE共享。
- 根据权利要求16所述的方法,其特征在于,所述UE在第二接收时间点接收所述基站发送的指示信息,包括:所述UE在第二接收时间点在公共控制信道接收所述基站发送的指示信息。
- 根据权利要求12所述的方法,其特征在于,所述方法还包括:所述UE接收所述基站发送的配置信息;所述UE根据所述配置信息确定所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、第一发送周期和第二发送周期,所述第一发送周期为所述基站向所述UE发送所述第一CSI-RS的周期,所述第二发送周期为在一个第一发送周期内所述基站向所述UE发送所述第二CSI-RS的周期。
- 一种基站,其特征在于,包括:发送单元,用于在第一发送时间点在第一CSI-RS资源上向用户设备UE发送第一CSI-RS;接收单元,用于接收所述UE发送的第一信道状态信息CSI,所述第一CSI为所述UE根据所述第一CSI-RS测量得到的CSI;确定单元,用于根据所述第一CSI确定第二CSI-RS资源;所述发送单元,还用于在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二发送时间点在所述第一发送时间点之后;其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CSI-RS资源指示CRI和预编码矩阵指示PMI或所述第一CSI包括所述目标CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;或者,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
- 根据权利要求19所述的基站,其特征在于,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
- 根据权利要求20所述的基站,其特征在于,当所述第一CSI-RS资源为K份CSI-RS资源、且所述第一CSI包括所述目标CRI时,所述确定单元,具体用于根据所述K份CSI-RS资源的K个CRI与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数;当所述第一CSI-RS资源为N个CSI-RS端口时,所述确定单元,具体用于根据所述PMI的值与所述资源集合中的R组资源的对应关系确定所述第二CSI-RS资源,R为大于1的整数。
- 根据权利要求20或21所述的基站,其特征在于,所述发送 单元在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述发送单元以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个所述第一发送周期的起始时间,在该第一发送周期内,所述发送单元以第二发送周期为周期,周期性的在所述第二CSI-RS资源上向所述UE发送所述第二CSI-RS,所述第二发送时间点为该第一发送周期内任意一个第二发送周期的起始时间。
- 根据权利要求20或21所述的基站,其特征在于,所述发送单元在一个CSI进程中发送所述第一CSI-RS和所述第二CSI-RS,所述发送单元以第一发送周期为周期,周期性的在所述第一CSI-RS资源上向所述UE发送所述第一CSI-RS,所述第一发送时间点为一个第一发送周期的起始时间,在该第一发送周期内,所述确定单元,还用于确定是否在第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS;若是,所述发送单元在第三发送时间点向所述UE发送触发信息并在所述第二发送时间点在所述第二CSI-RS资源上向所述UE发送第二CSI-RS,所述触发信息用于触发所述UE根据所述第二CSI-RS测量第二CSI,所述第三发送时间点为所述第二发送时间点或所述第三发送时间点在所述第一发送时间点和所述第二发送时间点之间,所述第二发送时间点位于该第一发送周期内。
- 根据权利要求20-23任一项所述的基站,其特征在于,当所述确定单元在所述第二发送时间点确定需要向所述UE发送物理下行共享信道PDSCH数据时,所述发送单元,还用于在所述第二发送时间点在所述资源集合中的空闲的CSI-RS资源上向所述UE发送PDSCH数据。
- 根据权利要求24所述的基站,其特征在于,所述发送单元,还用于:在第二发送时间点向所述UE发送指示信息,所述指示信息用于指示所述资源集合中的用于传输PDSCH数据的CSI-RS资源,所述指示信息承载在物理下行控制信道PDCCH中。
- 根据权利要求25所述的基站,其特征在于,所述资源集合被多个UE共享。
- 根据权利要求26所述的基站,其特征在于,所述发送单元,具体用于:在第二发送时间点在公共控制信道向所述多个UE发送指示信息。
- 根据权利要求22所述的基站,其特征在于,所述发送单元,还用于:向所述UE发送配置信息,所述配置信息中包括所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、所述第一发送周期和所述第二发送周期。
- 一种用户设备UE,其特征在于,包括:接收单元,用于在第一接收时间点接收基站在第一CSI-RS资源上发送的第一CSI-RS;测量单元,用于根据所述第一CSI-RS测量第一信道状态信息CSI;发送单元,用于向所述基站发送所述第一CSI;所述接收单元,还用于在第二接收时间点接收所述基站在第二CSI-RS资源上发送的第二CSI-RS,所述第二CSI-RS资源为所述基站根据所述第一CSI确定的发送所述第二CSI-RS的资源,所述第二CSI-RS资源包括X个CSI-RS端口,所述第二接收时间点在所述第一接收时间点之后;所述测量单元,还用于根据所述第二CSI-RS测量第二CSI;其中,所述第一CSI-RS资源为K份CSI-RS资源,所述K份CSI-RS资源包括M个CSI-RS端口,所述第一CSI包括目标CSI-RS资源指示CRI和预编码矩阵指示PMI或所述第一CSI包括所述目标 CRI,所述目标CRI为所述K份CSI-RS资源的K个CRI中的一个,K、M均为大于1的整数,X为大于等于1小于M的整数;或,所述第一CSI-RS资源为N个CSI-RS端口,所述第一CSI包括PMI,N为大于1的整数,X为大于等于1的整数。
- 根据权利要求29所述的UE,其特征在于,所述第二CSI-RS资源为资源集合中的一组或多组资源,所述资源集合为所述基站配置的资源集合。
- 根据权利要求30所述的UE,其特征在于,所述接收单元在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述接收单元以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,所述接收单元以第二接收周期为周期,周期性的接收所述基站在所述第二CSI-RS资源上发送的第二CSI-RS,所述第二接收时间点为该第一接收周期内任意一个第二接收周期的起始时间。
- 根据权利要求30所述的UE,其特征在于,所述接收单元在一个CSI进程中接收所述第一CSI-RS和所述第二CSI-RS,所述接收单元以第一接收周期为周期,周期性的接收所述基站在所述第一CSI-RS资源上发送的所述第一CSI-RS,所述第一接收时间点为一个所述第一接收周期的起始时间,在该第一接收周期内,所述接收单元在第三接收时间点接收所述基站发送的触发信息,所述第三接收时间点为所述第二接收时间点或所述第三接收时间点在所述第一接收时间点和所述第二接收时间点之间,所述第二接收时间点位于该第一接收周期内;所述测量单元在所述触发信息的触发下获取所述第二CSI-RS,并根据所述第二CSI-RS测量第二CSI。
- 根据权利要求30-32任一项所述的UE,其特征在于,所述 接收单元,还用于:在第二接收时间点接收所述基站发送的指示信息,所述指示信息承载在物理下行控制信道PDCCH中;所述UE还包括确定单元,所述确定单元,用于根据所述指示信息确定所述资源集合中的用于传输物理下行共享信道PDSCH数据的CSI-RS资源;所述UE还包括获取单元,所述获取单元,用于在所述资源集合中的用于传输PDSCH数据的CSI-RS资源上获取所述PDSCH数据。
- 根据权利要求33所述的UE,其特征在于,所述资源集合被多个UE共享。
- 根据权利要求34所述的UE,其特征在于,所述接收单元,具体用于:在第二接收时间点在公共控制信道接收所述基站发送的指示信息。
- 根据权利要求30所述的UE,其特征在于,所述接收单元,还用于:接收所述基站发送的配置信息;所述确定单元,还用于根据所述配置信息确定所述资源集合中的资源的位置、所述第一CSI-RS资源的位置、第一发送周期和第二发送周期,所述第一发送周期为所述基站向所述UE发送所述第一CSI-RS的周期,所述第二发送周期为在一个第一发送周期内所述基站向所述UE发送所述第二CSI-RS的周期。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103095431A (zh) * | 2011-11-08 | 2013-05-08 | 华为技术有限公司 | 参考信号处理的方法和装置 |
CN104412520A (zh) * | 2012-06-24 | 2015-03-11 | Lg电子株式会社 | 在无线通信***中报告信道状态信息的方法和装置 |
US20150200755A1 (en) * | 2012-07-03 | 2015-07-16 | Telefonaktiebolaget L M Ericsson (Publ) | CSI-RS Transmission |
CN105075319A (zh) * | 2013-04-09 | 2015-11-18 | 松下电器(美国)知识产权公司 | 将信道状态信息参考信号端口映射到资源块的方法、基站和用户装备 |
CN105429683A (zh) * | 2014-09-17 | 2016-03-23 | 上海朗帛通信技术有限公司 | 一种3d mimo传输方法和装置 |
-
2016
- 2016-04-01 WO PCT/CN2016/078355 patent/WO2017166303A1/zh active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103095431A (zh) * | 2011-11-08 | 2013-05-08 | 华为技术有限公司 | 参考信号处理的方法和装置 |
CN104412520A (zh) * | 2012-06-24 | 2015-03-11 | Lg电子株式会社 | 在无线通信***中报告信道状态信息的方法和装置 |
US20150200755A1 (en) * | 2012-07-03 | 2015-07-16 | Telefonaktiebolaget L M Ericsson (Publ) | CSI-RS Transmission |
CN105075319A (zh) * | 2013-04-09 | 2015-11-18 | 松下电器(美国)知识产权公司 | 将信道状态信息参考信号端口映射到资源块的方法、基站和用户装备 |
CN105429683A (zh) * | 2014-09-17 | 2016-03-23 | 上海朗帛通信技术有限公司 | 一种3d mimo传输方法和装置 |
Non-Patent Citations (1)
Title |
---|
Z TE ET AL.: "Correction to RI reference CSI process", 3GPP TSG-RAN WG1 MEETING #84 RL-161489, 24 February 2016 (2016-02-24), XP051079405 * |
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