CN110266432A - Trigger method, UE, base station and the system of channel state information non-periodic feedback - Google Patents

Trigger method, UE, base station and the system of channel state information non-periodic feedback Download PDF

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Publication number
CN110266432A
CN110266432A CN201910452262.4A CN201910452262A CN110266432A CN 110266432 A CN110266432 A CN 110266432A CN 201910452262 A CN201910452262 A CN 201910452262A CN 110266432 A CN110266432 A CN 110266432A
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csi
serving cell
csi measurement
measurement hypothesis
dynamic signaling
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CN110266432B (en
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夏亮
刘鹍鹏
任晓涛
周明宇
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention is suitable for the communications field, provide a kind of method for triggering channel state information non-periodic feedback, UE, base station and system, the described method includes: user equipment (UE) receives dynamic signaling, the dynamic signaling is used to indicate the UE and the CSI measurement of the first service cell of feeding back channel state information CSI is needed to assume that set is assumed in the CSI measurement of set or service cell set, the CSI measurement assumes that set includes that at least one measurement is assumed, one measurement assumes to include at least one measuring reference signals, the service cell set includes at least one serving cell；It feeds back first service cell according to the dynamic signaling and is measured based on CSI and assume the CSI of the set or CSI for assuming set based on CSI measurement of service cell set.The present invention, which can effectively solve the problems, such as to trigger in CoMP system, measures the CSI non-periodic feedback assumed based on a variety of CSI, reduces feedback overhead.

Description

Method, UE, base station and system for triggering aperiodic feedback of channel state information
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a method, UE, a base station and a system for triggering aperiodic feedback of channel state information.
Background
Coordinated Multiple Point transmission and reception (CoMP) technology refers to: multiple access points provide data transmission services to one or more users simultaneously. For the coordinated multi-point transceiving technology, a base station needs to use channel state information between User Equipment (UE) and a candidate access point, and between the UE and a candidate access set as an input quantity or a reference quantity to complete processes such as precoding transmission and multi-User pairing.
In the prior art, aperiodic feedback refers to that a UE sends a Channel State Information (CSI) request field (CSI request field) on a time-frequency resource corresponding to a Physical Uplink Shared Channel (PUSCH) in a dynamic signaling of a serving cell c, where the dynamic signaling includes Downlink Control Information (DCI) for Uplink transmission or Random Access Response acknowledgement (Random Access Response Grant), and the DCI for Uplink transmission includes DCI format 0 and DCI format 4. Specifically, if the CSI request field in the dynamic signaling contains 1bit (bit) information, "0" indicates that aperiodic feedback is not triggered, and "1" indicates that aperiodic feedback of serving cell c is triggered; if the CSI request field in the dynamic signaling contains 2-bit information, the aperiodic feedback is triggered according to the representation of the table one:
value of CSI request field Description of the invention
‘00’ Non-triggering non-periodic feedback
‘01’ Triggering aperiodic feedback for serving cell c
‘10’ Triggering aperiodic feedback for serving cell set 1
‘11’ Triggering aperiodic feedback for serving cell set 2
Watch 1
In table one, serving cell set 1 and serving cell set 2 are configured by higher layer signaling, respectively.
In the prior art, the serving cell may be a Component Carrier (CC), and the CSI of the serving cell may refer to CSI corresponding to the CC, which is different from CSI based on CSI measurement assumption in CoMP. In CoMP, the UE needs to feed back CSI based on multiple CSI measurement hypotheses, so an aperiodic feedback triggering mechanism for triggering the CSI based on the multiple CSI measurement hypotheses needs to be introduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic view of a system scenario in which a method for triggering aperiodic feedback of channel state information according to an embodiment of the present invention is applied;
fig. 2 is a flowchart illustrating an implementation of a method for triggering aperiodic feedback of channel state information according to another embodiment of the present invention;
fig. 3 is a flowchart illustrating an implementation of a method for triggering aperiodic feedback of channel state information according to another embodiment of the present invention;
fig. 4 is a block diagram of a user equipment according to another embodiment of the present invention;
fig. 5 is a block diagram of a base station according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The techniques described in the embodiments of the present invention may be used in various Wireless communication systems, such as current 2G and 3G communication systems and next-generation communication systems, such as Global System for mobile communications (GSM), Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, FDMA (SC-FDMA) systems, General Packet Radio Service (GPRS), General packet Access (FDMA) systems, Long Term Evolution (LTE), and other single carrier communication systems.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic view of a system scenario for applying the method for triggering aperiodic feedback of csi according to an embodiment of the present invention, and only the relevant parts of the embodiment are shown for convenience of description.
As shown in fig. 1, the system includes a User Equipment (UE) 1 and a plurality of base stations 2, wherein the UE1 communicates with the base stations 2 through a network connection.
The UE1 may be, among other things, a handheld device having wireless connection capability, or other processing device connected to a wireless modem, such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal.
The Base Station 2 (e.g., access point) may refer to a device in an access network that communicates with wireless terminals over an air interface through one or more sectors, and may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Base Station (NodeB or eNB or e-NodeB) in LTE, and so on.
In this embodiment, one of the base stations 2 may be used as a transmission node for a certain CSI corresponding measurement hypothesis, and the other base stations may be used as interference nodes. Or one base station is taken as a transmission node, the other base station is taken as an interference node, and other base stations except the two base stations are taken as non-interference nodes. Or one base station is taken as a transmission node, the other base station is taken as a non-interference node, and other base stations except the two base stations are taken as interference nodes.
It should be noted that the system scenario provided in this embodiment is only for explaining the present invention, and does not limit the protection scope of the present invention.
Fig. 2 shows a flow of implementing a method for triggering aperiodic feedback of channel state information according to another embodiment of the present invention, and the method process is described in detail as follows.
In step S201, receiving dynamic signaling;
in step S202, the CSI of the first serving cell based on the CSI measurement hypothesis set or the CSI of the serving cell set based on the CSI measurement hypothesis set is fed back according to the dynamic signaling.
In this embodiment, the dynamic signaling is used to indicate that the UE needs to feed back a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set of channel state information CSI, where the serving cell set includes at least one serving cell, the CSI measurement hypothesis set includes at least one measurement hypothesis, the measurement hypothesis includes at least one measurement reference signal that the user equipment needs to measure, and the user equipment measures to obtain a channel and interference according to the reference signal, so as to obtain the CSI; in the following embodiments, reference may be made to the description of the measurement hypothesis set in this embodiment, and details are not repeated.
As a preferred embodiment of the present invention, the dynamic signaling includes a CSI request field, where the CSI request field includes a bit number N, where N is an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
For example: and when the CSI request field indicates to trigger the reporting of the CSI measurement hypothesis set of the first serving cell.
In this embodiment, the first serving cell includes, but is not limited to, any of the following: the serving cell comprises a predefined serving cell, a serving cell configured through high-layer signaling, a serving cell transmitting dynamic signaling, a serving cell receiving aperiodic CSI and a serving cell indicated by the dynamic signaling.
The set of CSI measurement hypotheses includes, but is not limited to, at least one of: a first CSI measurement hypothesis, wherein the first CSI measurement hypothesis is a predefined CSI measurement hypothesis, or the first CSI measurement hypothesis is a CSI measurement hypothesis configured through higher layer signaling, or the first CSI measurement hypothesis is a CSI measurement hypothesis with the lowest number or the highest number; a CSI measurement hypothesis other than the first CSI measurement hypothesis; all CSI measurement hypotheses; a combination of the first CSI measurement hypothesis and one or more CSI measurement hypotheses other than the first CSI measurement hypothesis; and a set of CSI measurement hypotheses configured by higher layer signaling.
In this embodiment, the CSI measurement hypothesis is configured to the UE by higher layer signaling, and the CSI measurement hypothesis includes a channel measurement hypothesis and an interference measurement hypothesis. And recording the CSI of the first CSI measurement hypothesis as CSI1, and recording the CSI corresponding to the CSI measurement hypotheses except the CSI1 as CSI2 and CSI 3.
And receiving the bit (bit) number N of the CSI request field configured by the base station through the first high-level signaling.
For example, if the CSI request field is 1bit, as shown in table two:
watch two
If the CSI request field is 2 bits, as shown in Table three:
watch III
If the CSI request field is 3 bits, as shown in Table four:
watch four
Receiving a CSI request domain configured by a base station through a second high-level signaling, wherein the CSI request domain is used for triggering the report of CSI of a CSI measurement hypothesis set of the first serving cell; or receiving a CSI request field configured by a base station through transmission of the CSI request field or through at least one of the following ways, the CSI request field being used for triggering reporting of CSI of the CSI measurement hypothesis set of the first serving cell:
sending a time domain resource number of a physical layer uplink shared channel (PUSCH) carrying non-periodic feedback CSI;
numbering frequency domain resources; and
the serving cell number.
Specifically, the UE configures the UE according to a predefined rule or a received rule configured by the base station through higher layer signaling, and at least one of: and the time domain resource number, the frequency domain resource number and the serving cell number are used for judging whether the CSI request domain is used for triggering the report of the CSI measurement hypothesis set of the first serving cell.
If at least one of: if the time domain resource number, the frequency domain resource number and the serving cell number meet the predefined rule or the rule configured by the base station through the high-level signaling, the reporting of the CSI measurement hypothesis set of the first serving cell is triggered through the CSI request domain; otherwise the CSI request field is notFor triggering reporting of CSI of the CSI measurement hypothesis set of the first serving cell. For example, assume that at least one of the following of the CSI request fields is transmitted: when the time domain resource number, the frequency domain resource number and the serving cell number are l, and l is an even number, the CSI request domain is used for triggering the reporting of the CSI measurement hypothesis set of the first serving cell, and when l is an odd number, the CSI request domain is not used for triggering the reporting of the CSI measurement hypothesis set of the first serving cell; or predefining a set L, if L ∈ L, indicating that the CSI request domain is used for triggering the report of the CSI measurement hypothesis set of the first serving cell, if L ∈ L, and if L ∈ L indicates that the CSI request domain is used for triggering the report of the CSI measurement hypothesis set of the first serving cellIndicating that the CSI request field is not used for triggering the reporting of the CSI measurement hypothesis set of the first serving cell.
And if the CSI request field is not used for triggering the reporting of the CSI measurement hypothesis set of the first serving cell, using the CSI request field for triggering the reporting of the existing CSI of LTE Release 10. For example, when the CSI request field includes 1bit information, '0' indicates that aperiodic feedback is not triggered, and '1' indicates that aperiodic feedback of serving cell c is triggered.
As a preferred embodiment of the present invention, this embodiment may trigger CSI aperiodic feedback of multiple CSI measurement hypotheses, and may implement semi-static or dynamic switching between multi-serving cell (multi-carrier) aperiodic feedback and CSI aperiodic feedback of multiple CSI measurement hypotheses.
For example, when the CSI request field is used to indicate that reporting of CSI of the first CSI measurement hypothesis of the first serving cell is triggered, or indicate that reporting of CSI of the second serving cell and the CSI measurement hypothesis set are triggered, or indicate that reporting of CSI of the second serving cell and the CSI measurement hypothesis set is triggered.
In this embodiment, if the CSI request field includes 1bit information, '0' indicates that aperiodic feedback is not triggered, '1' indicates that aperiodic feedback of serving cell c is triggered; if the CSI request field contains 2bit information, triggering non-periodic feedback according to the representation of the table five:
watch five
In table five, the second serving cell and CSI measurement hypothesis set and the second serving cell and CSI measurement hypothesis set are configured to the UE by the higher layer signaling.
In this embodiment, the CSI measurement hypothesis set of the serving cell set includes at least one second measurement hypothesis corresponding to at least one second serving cell;
the second serving cell is a serving cell in the serving cell set, and may be one or more, for example, the second serving cell may be cell1 or cell 2. The aperiodic feedback triggering the second serving cell and the CSI measurement hypothesis set in the fifth table may be the aperiodic feedback triggering the cell1 and the CSI measurement hypothesis set, and the aperiodic feedback triggering the cell2 and the CSI measurement hypothesis set.
Before the UE receives dynamic signaling, the method further includes:
and receiving third high-layer signaling sent by the base station, wherein the third high-layer signaling comprises the second serving cell and joint coding of a second measurement hypothesis corresponding to the second serving cell.
The third higher layer signaling for configuring the first serving cell and the CSI measurement hypothesis set or the second serving cell and the CSI measurement hypothesis set includes X bits (bits), where X is a maximum serving cell number multiplied by a maximum CSI measurement hypothesis number, a mapping relationship exists among the bits, the serving cell and the CSI measurement hypothesis, and X is an integer greater than or equal to 1.
Wherein the mapping relationship existing between the bits, serving cell and CSI measurement hypothesis includes but is not limited to: each bit corresponds to a CSI measurement hypothesis in one serving cell. For example, the 1 st bit corresponds to the CSI measurement hypothesis numbered 1 in the serving cell numbered 1, the 2 nd bit corresponds to the CSI measurement hypothesis numbered 2 in the serving cell numbered 1, and so on, so that each bit corresponds to one CSI measurement hypothesis in one serving cell. For another example, the serving cell and CSI measurement hypotheses are jointly numbered, and the nth bit corresponds to the serving cell and CSI measurement hypothesis with the joint number n, where the definition of the joint number n includes but is not limited to: the joint number n is (serving cell number-1) × maximum CSI measurement hypothesis number + CSI measurement hypothesis number or the joint number n is (CSI measurement hypothesis number-1) × maximum serving cell number + serving cell number. The CSI of the CSI measurement hypothesis in the service cell corresponding to the bit does not need to be fed back when the bit value is '0', and the CSI of the CSI measurement hypothesis in the service cell corresponding to the bit needs to be fed back when the bit value is '1'; or, a bit value of '0' may be represented as that CSI of the CSI measurement hypothesis in the serving cell corresponding to the bit needs to be fed back, and a bit value of '1' may be represented as that CSI of the CSI measurement hypothesis in the serving cell corresponding to the bit does not need to be fed back.
The higher layer signaling for configuring the second serving cell and CSI measurement hypothesis set one or the other second serving cell and CSI measurement hypothesis set two in the serving cell set includes Y bytes (byte), where Y is a preset integer greater than or equal to 1, for example, Y is 5 or 8. Each byte corresponds to a joint number n of the serving cell and the CSI measurement hypothesis, where the joint number n is defined in a manner including, but not limited to: the joint number n is (serving cell number-1) × maximum CSI measurement hypothesis number + CSI measurement hypothesis number or the joint number n is (CSI measurement hypothesis number-1) × maximum serving cell number + serving cell number. If the value of a certain byte included in the high-level signaling is not in the value range of the joint number n, the byte is not used for triggering non-periodic feedback; and if a byte value S included in the high-level signaling is within the value range of the joint number n, indicating that the CSI of the serving cell with the joint number S and the CSI measurement hypothesis needs to be fed back. For example, 0 is not in the value range of the joint number n, and if the byte value is '0', it indicates that the byte is not used for triggering non-periodic feedback; if the byte value is 'n' and n is not 0, it indicates that feedback is required for the CSI of the joint number n serving cell and CSI measurement hypothesis.
The higher layer signaling for configuring the second serving cell and the CSI measurement hypothesis set or the other second serving cell and the CSI measurement hypothesis set in the serving cell set may be the higher layer signaling for configuring the cell1 and the CSI measurement hypothesis set or the cell2 and the CSI measurement hypothesis set.
It should be noted that, in the present embodiment, the serving cell number, the CSI measurement hypothesis number, and the joint number of the serving cell and the CSI measurement hypothesis are all exemplified by the minimum number being 1, but the present invention is not limited to the minimum number being 1, and may be 0 or other values.
The embodiment does not need to modify the dynamic signaling, and only needs to modify the description of the dynamic signaling through the high-level signaling, thereby reducing the overhead of the dynamic signaling.
For example, when the CSI request field is used to indicate that reporting of CSI of the CSI measurement hypothesis set of the first serving cell is triggered, or indicate that reporting of CSI of the CSI measurement hypothesis set of the first serving cell set is triggered, or indicate that reporting of CSI of the CSI measurement hypothesis set of the second serving cell set is triggered.
In this embodiment, the definition of the first serving small-area CSI measurement assumption set is the same as that of the first serving small-area CSI measurement assumption set in the foregoing preferred embodiment of the present invention, and is not described herein again.
In this embodiment, when the CSI request field is 2 bits, as shown in table six:
watch six
When the CSI request field is 3 bits, as shown in table seven:
watch seven
When the CSI request field is M + K bits, M bits of the M + K bits are used to indicate that aperiodic feedback of the CSI is triggered and to indicate that aperiodic feedback of the CSI is triggered, and K bits of the M + K bits are used to indicate a CSI measurement hypothesis set corresponding to the first serving cell or a CSI measurement hypothesis set corresponding to the serving cell set, where M and K are integers greater than or equal to 1. For example, when the M is 1, 1bit is used to indicate whether to trigger aperiodic feedback, e.g., '0' denotes that aperiodic feedback is not triggered, '1' denotes that aperiodic feedback of serving cell c is triggered; when K is 3, each bit corresponds to one CSI measurement hypothesis, '0' indicates that the CSI of the CSI measurement hypothesis corresponding to the bit does not need to be fed back, and '1' indicates that the CSI of the CSI measurement hypothesis corresponding to the bit needs to be fed back. For another example, when M is 2, 2 bits are used to indicate whether to trigger aperiodic feedback and which set of serving cells to trigger aperiodic feedback, for example, according to the representation in table eight:
value of CSI request field Description of the invention
‘00’ Non-triggering non-periodic feedback
‘01’ Triggering aperiodic feedback for serving cell c
‘10’ Triggering non-periodic feedback for serving cell set unification
‘11’ Triggering aperiodic feedback of serving cell set two
Table eight
When K is 3, each bit corresponds to one CSI measurement hypothesis, '0' indicates that the CSI of the CSI measurement hypothesis corresponding to the bit does not require feedback, and '1' indicates that the CSI of the CSI measurement hypothesis corresponding to the bit requires feedback.
In this embodiment, the dynamic signaling includes a CSI request Field and a carrier indicator Field CIF, where the CSI request Field is used to indicate a first serving cell or a serving cell set that triggers aperiodic feedback of CSI, and the Carrier Indicator Field (CIF) is used to indicate a CSI measurement hypothesis set corresponding to the first serving cell or a CSI measurement hypothesis set corresponding to the serving cell set.
In order to further reduce the overhead of dynamic signaling, this embodiment further includes: the partial state in the CSI request domain is represented by a time domain resource number and/or a frequency domain resource number and/or a serving cell number of the transmission CSI request domain; or the time domain resource number and/or the frequency domain resource number and/or the serving cell number of the PUSCH carrying the aperiodic feedback content are/is sent.
Specifically, the UE determines CSI of CSI measurement hypothesis in a serving cell or a serving cell set that needs to be fed back according to a predefined rule or a received rule configured by the base station through a high-level signaling, and the time domain resource number and/or the frequency domain resource number and/or the serving cell number. For example, the UE determines whether to perform aperiodic feedback and which CSI of the serving cell set is fed back according to the CSI request field, and the UE determines the CSI measurement assumption set that needs to be fed back according to a predefined rule or a received rule configured by the base station through a higher layer signaling, and the time domain resource number and/or the frequency domain resource number and/or the serving cell number. For another example, assuming that the time domain resource number and/or the frequency domain resource number and/or the serving cell number of the CSI request transmission domain is 1, the rule is: l is even or l is odd. At this time, if the CSI request field is 2 bits, as shown in table nine or table ten:
watch nine
Watch ten
By the embodiment, the aperiodic feedback when the multi-carrier and the CoMP coexist is realized, and the overhead of dynamic signaling is further reduced.
It should be noted that the meaning of the value representation of the CSI request field in the embodiment of the present invention is not limited to the above list, and the values and the described corresponding relationships of the CSI request fields listed in tables two to ten may also be interchanged. For example, '00' may be represented as not triggering aperiodic feedback, '01' may be represented as triggering aperiodic feedback of CSI1, CSI2, CSI3 of the first serving cell in table two; it is also possible to denote '01' as not triggering aperiodic feedback and '00' as triggering aperiodic feedback of CSI1, CSI2, CSI3 of the first serving cell (as shown in table eleven).
Watch eleven
In this embodiment, the first serving cell includes any one of the following serving cells: a serving cell configured through a fourth higher layer signaling, a serving cell transmitting the dynamic signaling, a serving cell receiving aperiodic CSI, and a serving cell indicated by the dynamic signaling. The dynamic signaling includes downlink control information for uplink transmission or a corresponding acknowledgement for random access.
The first serving cell set and the second serving cell set may be sets including different serving cells, for example, the first serving cell set may include cell1 and cell2, and the second serving cell set may include cell3 and cell 4.
Further, the UE determines whether the UE transmits only uplink control information in the current PUSCH report according to the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell, the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the maximum number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, or the number of transmission modes or serving cells of the UE.
The uplink control information includes CSI. The CSI measurement hypothesis may also be described as a CSI process.
Specifically, the UE determines a first threshold value N _ PRB _ CSI according to the number of CSI measurement hypotheses in a CSI measurement hypothesis set of a second dynamic signaling or a fifth high-layer signaling or a sixth high-layer signaling or the first serving cell, or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set or the maximum number of CSI measurement hypotheses or the number of transmission modes or serving cells of the UE, and if the number N _ PRB of Physical Resource Blocks (PRBs) allocated to the UE is less than or equal to the first threshold value N _ PRB _ CSI, the UE only transmits uplink control information in the current PUSCH report.
Specifically, the method for the UE to determine the first threshold value N _ PRB _ CSI according to the second dynamic signaling may be: the value range of the first threshold is predefined, for example, the value range of the first threshold is {20,28}, and the base station notifies the UE of the value of the first threshold through a second dynamic signaling, for example, the second dynamic signaling may be sent to the UE through a Physical Downlink Control Channel (PDCCH). The value range of the first threshold value at least comprises an integer which is more than 20. The second dynamic signaling may be a Modulation and Coding Scheme (MCS), such as modulation and Coding Scheme indication IMCSWhen the value is 29, the first threshold value is 20; i isMCSAt 30, the first threshold value is 28.
Specifically, the method for the UE to determine the first threshold value N _ PRB _ CSI according to the fifth higher layer signaling may be: the value range of the first threshold is predefined, for example, the value range of the first threshold is {20,28}, and the base station notifies the UE of the value of the first threshold through a fifth higher layer signaling, such as a Radio Resource Control (RRC) signaling. The value range of the first threshold value at least comprises an integer which is more than 20.
Specifically, the method for the UE to determine the first threshold value N _ PRB _ CSI according to the sixth higher layer signaling may be: the base station configures at least one CSI measurement hypothesis of at least one service cell for the UE through a sixth high-level signaling, and the UE determines a first threshold value according to the total number of the CSI measurement hypotheses configured by the sixth high-level signaling.
Specifically, the method for determining the first threshold value by the UE according to the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set may be any one of the following methods:
(1) and the UE determines a first threshold value according to the CSI measurement hypothesis set of the first serving cell or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, which is indicated by the dynamic signaling and is required to be fed back by the UE.
(2) And the UE determines a first threshold value according to the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell and the maximum value of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set.
(3) And the UE determines a first threshold value according to the sum of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell and the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set.
(4) The UE determines a first threshold value according to the sum of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell and the number of independent CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set.
Further, the first threshold value is equal to 4 times the number of first CSI measurement hypotheses,
or,
when the number of the first CSI measurement hypotheses is less than or equal to a first CSI threshold value, the first threshold value is equal to a first candidate threshold value; when the number of the first CSI measurement hypotheses is greater than a first CSI threshold value, the first threshold value is equal to a second candidate threshold value. The first CSI threshold value is a predefined positive integer, such as 5; the first candidate threshold value is a predefined positive integer, such as 20; the second candidate threshold is a predefined positive integer greater than the first candidate threshold, such as 28.
The first CSI measurement hypothesis number comprises any one of the following values:
the sixth higher layer signaling is the total number of CSI measurement hypotheses configured for the UE, the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI indicated by the dynamic signaling, the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell, and the maximum value of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the CSI measurement hypothesis set of the first serving cell is a set of CSI measurement hypotheses, and the CSI measurement hypothesis set of the serving cell set is a set of CSI measurement hypotheses.
Specifically, the maximum CSI measurement hypothesis number is a configurable maximum CSI measurement hypothesis number on one serving cell or a configurable maximum CSI measurement hypothesis total number on all serving cells, or a configurable maximum CSI measurement hypothesis number in the CSI measurement hypothesis set of the first serving cell, or a configurable maximum CSI measurement hypothesis number in the CSI measurement hypothesis set of the serving cell set. The maximum CSI measurement hypothesis number may also be a predefined value, or a predefined value multiplied by the number of serving cells, for example 4 or 4 multiplied by the number of serving cells. The maximum CSI measurement assumed number may also be a value that the UE selects from a value range of the maximum CSI measurement assumed number and reports the value to the base station, or a value that the UE selects from a value range of the maximum CSI measurement assumed number and reports the value to the base station is multiplied by the number of serving cells, for example, the value range of the maximum CSI measurement assumed number is {1,3,4}, and the value that the UE selects and reports to the base station is P, so the maximum CSI measurement assumed number may be P or P multiplied by the number of serving cells.
Specifically, the method for determining the first threshold value N _ PRB _ CSI by the UE according to the transmission mode of the UE or the number of serving cells may be: if the UE has only one serving cell and is in CoMP transmission mode, the first threshold value is equal to a third candidate threshold value; the first threshold value is equal to the fourth candidate threshold value if the UE has multiple serving cells and is in CoMP transmission mode. Wherein the fourth candidate threshold value is greater than the third candidate threshold value. The specific third candidate threshold value and the fourth candidate threshold value are predefined values or determined according to a seventh high-level signaling or the maximum number of CSI measurement hypotheses.
Further, the UE determines the modulation mode when only uplink control information is transmitted in the current PUSCH report according to the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell, the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the maximum number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, or the number of transmission modes or serving cells of the UE.
Specifically, the UE determines a first threshold value N _ PRB _ CSI according to the number of CSI measurement hypotheses in a third dynamic signaling or an eighth high-layer signaling or the CSI measurement hypothesis set of the first serving cell, or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, or the maximum number of CSI measurement hypotheses, or the number of transmission modes or serving cells of the UE, and if the number N _ PRB allocated to the UE is less than or equal to the first threshold value N _ PRB _ CSI, the UE uses Quadrature phase shift modulation (QPSK) when only transmitting uplink control information in a current PUSCH report.
Or,
predefining a second CSI threshold value, and if the number of the second CSI measurement hypotheses is less than or equal to the second CSI threshold value, using quadrature phase Shift modulation (QPSK) modulation when the UE only transmits uplink control information in the current PUSCH report; if the number of the second CSI measurement hypotheses is greater than a second CSI threshold value, the UE uses 16-quadrature amplitude Modulation (16 QAM) when only transmitting uplink control information in the current PUSCH report; the second CSI measurement hypothesis number includes any one of the following values: the eighth higher layer signaling is a total number of CSI measurement hypotheses configured for the UE, a number of CSI measurement hypotheses in a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, which is indicated by the dynamic signaling and to which the UE needs to feed back channel state information CSI, a number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell, and a maximum value of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the CSI measurement hypothesis set of the first serving cell is a set of CSI measurement hypotheses, and the CSI measurement hypothesis set of the serving cell set is a set of CSI measurement hypotheses.
Or,
and the UE determines the modulation mode when only the uplink control information is transmitted in the current PUSCH report according to the third dynamic signaling. The third dynamic signaling may be a Modulation and Coding Scheme (MCS), such as Modulation and Coding Scheme indication IMCSWhen the PUSCH is reported, the UE uses Quadrature Phase Shift Keying (QPSK) modulation when only uplink control information is transmitted in the current PUSCH report; modulation coding scheme indication IMCSWhen 30, then the UE uses 16-Quadrature Amplitude Modulation (16 QAM) when only uplink control information is transmitted in the current PUSCH report.
Or,
if the UE only has one serving cell and is in a CoMP transmission mode, the UE only uses QPSK when transmitting uplink control information in the current PUSCH report; if the UE has multiple serving cells and is in a CoMP transmission mode, the UE uses 16QAM when only transmitting uplink control information in the current PUSCH report.
Fig. 3 shows a flowchart of an implementation of a method for triggering aperiodic feedback of channel state information according to another embodiment of the present invention, where the method process is detailed as follows:
in step S301, sending dynamic signaling to a user equipment UE, so that the UE feeds back CSI of a first serving cell based on a CSI measurement hypothesis set or CSI of a serving cell set based on a CSI measurement hypothesis set according to the dynamic signaling;
wherein the dynamic signaling is used to indicate a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set that the UE needs to feed back Channel State Information (CSI), the CSI measurement hypothesis set includes at least one measurement hypothesis, the measurement hypothesis includes at least one measurement reference signal, and the serving cell set includes at least one serving cell. Further, the implementation also includes:
the dynamic signaling comprises a CSI request field, wherein the CSI request field comprises a bit number N, and the N is an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
Further, the implementation also includes:
and configuring the bit number N of the CSI request domain for the UE through a first high-level signaling.
Further, the implementation also includes:
configuring, by a second higher layer signaling, whether the CSI request field is used to trigger reporting of CSI of the CSI measurement hypothesis set of the first serving cell to the UE, or transmitting, by the CSI request field or by at least one of the following manners, the CSI request field configured by the UE to trigger reporting of CSI of the CSI measurement hypothesis set of the first serving cell:
sending a time domain resource number of a physical layer uplink shared channel (PUSCH) carrying non-periodic feedback CSI;
numbering frequency domain resources; and
the serving cell number.
Specifically, a rule is configured to the UE through a high-level signaling, so that the UE determines, according to the configured rule and the time domain resource number and/or the frequency domain resource number and/or the serving cell number, whether a CSI request field is used for triggering CSI of a CSI measurement hypothesis set of a first serving cell, or so that the UE determines, according to the configured rule and the time domain resource number and/or the frequency domain resource number and/or the serving cell number, CSI of CSI measurement hypotheses in a serving cell or a serving cell set that needs to be fed back.
Further, before the UE receives the dynamic signaling, this embodiment further includes:
and sending third high-layer signaling to the UE, wherein the third high-layer signaling comprises the second serving cell and joint coding of a second measurement hypothesis corresponding to the second serving cell.
In this embodiment, the dynamic signaling includes downlink control information for uplink transmission or a corresponding acknowledgement for random access.
Further, the implementation also includes:
and configuring whether the UE only transmits uplink control information in the current PUSCH report to the UE through a second dynamic signaling or a fifth high-layer signaling or a sixth high-layer signaling.
Further, the implementation also includes:
and configuring a third candidate threshold value and a fourth candidate threshold value for the UE through a seventh high-level signaling.
Further, the implementation also includes:
and configuring a modulation mode when only uplink control information is transmitted in the current PUSCH report to the UE through a third dynamic signaling or an eighth high-layer signaling.
Fig. 4 shows a configuration of a user equipment according to another embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown.
The user equipment 1 is applicable to various wireless communication systems.
The user equipment 1 comprises a signaling receiving unit 11 and an information feedback unit 12. The specific functions of each unit are as follows:
a signaling receiving unit 11, configured to receive dynamic signaling, where the dynamic signaling is used to indicate a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, where the UE needs to feed back channel state information CSI, where the CSI measurement hypothesis set includes at least one measurement hypothesis, the measurement hypothesis includes at least one measurement reference signal, and the serving cell set includes at least one serving cell;
an information feedback unit 12, configured to feed back, according to the dynamic signaling received by the signaling receiving unit, CSI of the first serving cell based on the CSI measurement assumption set or CSI of the serving cell set based on the corresponding CSI measurement assumption.
Further, the dynamic signaling includes a CSI request field, where the CSI request field includes a number N of bits, and N is an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
Further, the user equipment 1 further includes:
a first receiving unit 13, configured to receive the bit number N of the CSI request field configured by the base station through the first higher layer signaling.
A second receiving unit 14, configured to receive that the CSI request field configured by the base station through a second higher layer signaling is used to trigger reporting of CSI of the CSI measurement hypothesis set of the first serving cell.
A third receiving unit 15, configured to receive a report that the CSI request field configured by the base station through transmitting the CSI request field or through at least one of the following ways is used to trigger the CSI of the CSI measurement hypothesis set of the first serving cell:
sending a time domain resource number of a physical layer uplink shared channel (PUSCH) carrying non-periodic feedback CSI;
numbering frequency domain resources; and
the serving cell number.
Further, the third receiving unit 15 is specifically configured to determine, according to a predefined rule or a received rule configured by the base station through a higher layer signaling and the time domain resource number and/or the frequency domain resource number and/or the serving cell number, whether the CSI request field is used to trigger the CSI of the CSI measurement hypothesis set of the first serving cell, and if the time domain resource number and/or the frequency domain resource number and/or the serving cell number conform to the predefined rule or the rule configured by the base station through the higher layer signaling, trigger the CSI of the CSI measurement hypothesis set of the first serving cell through the CSI request field; otherwise, the CSI request field is not used to trigger CSI of the CSI measurement hypothesis set of the first serving cell.
The CSI request field is used for triggering CSI of a CSI measurement hypothesis set of a first serving cell, wherein the CSI measurement hypothesis set of the first serving cell is predefined or configured by the higher layer signaling.
The set of CSI measurement hypotheses for the set of serving cells includes: at least one second measurement hypothesis corresponding to the at least one second serving cell;
before the UE receives the dynamic signaling, the UE1 further includes:
a fourth receiving unit 16, configured to receive a third higher layer signaling sent by the base station, where the third higher layer signaling includes the second serving cell and a joint code of a second measurement hypothesis corresponding to the second serving cell.
Preferably, the third higher layer signaling includes X bits, where X is the maximum serving cell number multiplied by the maximum CSI measurement hypothesis number, and there is a mapping relationship between the bits, the serving cell, and the CSI measurement hypothesis, where X is an integer greater than or equal to 1.
Preferably, the third higher layer signaling includes Y bytes, where Y is an integer greater than or equal to 1, and each byte corresponds to a joint coding of the serving cell and the CSI measurement hypothesis.
Preferably, the CSI request field includes M + K bits, M bits of the M + K bits are used to indicate that aperiodic feedback of the CSI is triggered and to indicate that aperiodic feedback of the CSI is triggered, K bits of the M + K bits are used to indicate a CSI measurement hypothesis set corresponding to the first serving cell or a CSI measurement hypothesis set corresponding to the serving cell set, and M and K are integers greater than or equal to 1.
In this embodiment, the dynamic signaling includes a CSI request field and a carrier indicator field CIF, where the CSI request field is used to indicate a first serving cell or a serving cell set that triggers aperiodic feedback of CSI, and the carrier indicator field CIF is used to indicate a CSI measurement hypothesis set corresponding to the first serving cell or a CSI measurement hypothesis set corresponding to the serving cell set.
The first serving cell includes any one of the following serving cells: a serving cell configured through a fourth higher layer signaling, a serving cell transmitting the dynamic signaling, a serving cell receiving aperiodic CSI, and a serving cell indicated by the dynamic signaling.
The dynamic signaling includes downlink control information for uplink transmission or a corresponding acknowledgement for random access.
Further, the user equipment further includes:
a first determining unit 17, configured to determine whether the UE only transmits uplink control information in the current PUSCH report according to the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the second dynamic signaling, the fifth higher layer signaling, the sixth higher layer signaling, or the first serving cell, or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, or the maximum CSI measurement hypothesis number, or the transmission mode of the UE or the number of serving cells.
Specifically, the first determining unit 17 is configured to determine a first threshold according to the number of CSI measurement hypotheses in a CSI measurement hypothesis set of a second dynamic signaling, a fifth high-layer signaling, a sixth high-layer signaling, or the first serving cell, or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, or the maximum number of CSI measurement hypotheses, or the number of transmission modes or serving cells of the UE, and if the number of physical resource blocks PRB allocated to the UE is less than or equal to the first threshold, the UE only transmits uplink control information in the current physical uplink shared channel PUSCH report.
Specifically, the method for determining the first threshold value by the first determining unit 17 further includes any one of:
predefining a value range of a first threshold, informing the UE of the value of the first threshold by a base station through a second dynamic signaling or a fifth high-level signaling, wherein the value range of the first threshold at least comprises an integer larger than 20,
or,
the base station configures at least one CSI measurement hypothesis of at least one service cell for the UE through sixth high-layer signaling, the UE determines a first threshold value according to the total number of the CSI measurement hypotheses configured by the sixth high-layer signaling,
or,
the UE determines a first threshold value according to the CSI measurement hypothesis set of the first serving cell or the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, which is indicated by the dynamic signaling and is required to feed back the CSI,
or,
the UE determines a first threshold value according to the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell and the maximum value of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set,
or,
the UE determines a first threshold value according to the sum of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell and the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set,
or,
the UE determines a first threshold value according to the sum of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell and the number of independent CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set,
or,
if the UE has only one serving cell and is in CoMP transmission mode, the first threshold value is equal to a third candidate threshold value; the first threshold value is equal to a fourth candidate threshold value if the UE has multiple serving cells and is in CoMP transmission mode.
Further, the first determining unit 17 is configured to determine the method of the first threshold, and further includes:
the first threshold value is equal to 4 times the number of first CSI measurement hypotheses,
or,
when the number of the first CSI measurement hypotheses is less than or equal to a first CSI threshold value, the first threshold value is equal to a first candidate threshold value; when the number of the first CSI measurement hypotheses is greater than a first CSI threshold value, the first threshold value is equal to a second candidate threshold value.
The first CSI measurement hypothesis number comprises any one of the following values:
the sixth higher layer signaling is a total number of CSI measurement hypotheses configured for the UE, a number of CSI measurement hypotheses in a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, which is indicated by the dynamic signaling and to which the UE needs to feed back channel state information CSI, a number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell, and a maximum value of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the CSI measurement hypothesis set of the first serving cell is a set of CSI measurement hypotheses, and the CSI measurement hypothesis set of the serving cell set is a set of CSI measurement hypotheses.
The third candidate threshold value and the fourth candidate threshold value are predefined values or determined according to a seventh high-level signaling or the maximum number of CSI measurement hypotheses.
The maximum CSI measurement hypothesis number comprises any one of the following values:
the number of configurable maximum CSI measurement hypotheses in one serving cell, the number of configurable maximum CSI measurement hypotheses in a CSI measurement hypothesis set of the first serving cell, the number of configurable maximum CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the total number of configurable maximum CSI measurement hypotheses in all serving cells, a predefined value multiplied by the number of serving cells, a value selected by the UE from the value range of the maximum CSI measurement hypotheses and reported to the base station, and a value selected by the UE from the value range of the maximum CSI measurement hypotheses and reported to the base station multiplied by the number of serving cells.
Further, before the UE determines whether the UE transmits only uplink control information in the current PUSCH report, the UE1 further includes:
a fifth receiving unit 171, configured to receive the second dynamic signaling or the fifth higher layer signaling or the sixth higher layer signaling or the seventh higher layer signaling sent by the base station. The second dynamic signaling or the fifth high-level signaling or the sixth high-level signaling is used for configuring the UE whether the UE only transmits uplink control information in the current PUSCH report. The seventh high layer signaling is used to indicate the third candidate threshold value and the fourth candidate threshold value. The second dynamic signaling comprises a modulation coding scheme indication.
Further, the user equipment 1 further includes:
a second determining unit 18, configured to determine a modulation mode when only uplink control information is transmitted in the current PUSCH report according to a number of CSI measurement hypotheses in a third dynamic signaling or an eighth high-layer signaling or the CSI measurement hypothesis set of the first serving cell, or a number of CSI measurement hypotheses in a CSI measurement hypothesis set of the serving cell set, or a maximum number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, or a transmission mode of the UE or a number of serving cells.
Specifically, the method for determining, by the second determining unit 18, the modulation mode when only the uplink control information is transmitted in the current PUSCH report includes:
predefining a second CSI threshold value, and if the number of the second CSI measurement hypotheses is less than or equal to the second CSI threshold value, using quadrature phase shift modulation (QPSK) when only uplink control information is transmitted in the current PUSCH report by the UE; and if the number of the second CSI measurement hypotheses is larger than a second CSI threshold value, the UE uses 16-quadrature amplitude modulation (16 QAM) when only uplink control information is transmitted in the current PUSCH report.
The second CSI measurement hypothesis number includes any one of the following values: the eighth higher layer signaling is a total number of CSI measurement hypotheses configured for the UE, a number of CSI measurement hypotheses in a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, which is indicated by the dynamic signaling and to which the UE needs to feed back channel state information CSI, a number of CSI measurement hypotheses in the CSI measurement hypothesis set of the first serving cell, and a maximum value of the number of CSI measurement hypotheses in the CSI measurement hypothesis set of the serving cell set, the CSI measurement hypothesis set of the first serving cell is a set of CSI measurement hypotheses, and the CSI measurement hypothesis set of the serving cell set is a set of CSI measurement hypotheses.
Specifically, the method for determining, by the second determining unit 18, the modulation mode when only the uplink control information is transmitted in the current PUSCH report further includes:
if the UE only has one serving cell and is in a CoMP transmission mode, the UE uses QPSK when only transmitting uplink control information in the current PUSCH report; if the UE has multiple serving cells and is in a CoMP transmission mode, the UE uses 16QAM when only transmitting uplink control information in the current PUSCH report.
Before the UE determines the modulation scheme when only uplink control information is transmitted in the current PUSCH report, the UE1 further includes:
a sixth receiving unit 181, configured to receive the third dynamic signaling or the eighth high-layer signaling sent by the base station. And the third dynamic signaling or the eighth high-level signaling is used for configuring a modulation mode for the UE when only uplink control information is transmitted in the current PUSCH report. The third dynamic signaling comprises a modulation coding scheme indication.
The CSI measurement hypothesis includes a CSI process.
The ue provided in this embodiment may use the corresponding aperiodic feedback method for triggering channel state information, for details, refer to the related description of the embodiment corresponding to fig. 2 for triggering aperiodic feedback of channel state information, and are not described herein again.
Fig. 5 shows a configuration of a base station according to another embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown.
The base station can be applied to various wireless communication systems.
The base station 2 includes:
a signaling sending unit 21, configured to send dynamic signaling to a user equipment UE, so that the UE feeds back, according to the dynamic signaling, CSI of a first serving cell based on a CSI measurement hypothesis set or CSI of a serving cell set based on a CSI measurement hypothesis set;
wherein the dynamic signaling is used to indicate a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set that the UE needs to feed back Channel State Information (CSI), the CSI measurement hypothesis set includes at least one measurement hypothesis, the measurement hypothesis includes at least one measurement reference signal, and the serving cell set includes at least one serving cell.
Further, the dynamic signaling includes a CSI request field, where the CSI request field includes a number N of bits, and N is an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
Further, the base station 2 further includes:
a first sending unit 22, configured to configure the bit number N of the CSI request field for the UE through a first higher layer signaling.
A second sending unit 23, configured to configure, through a second higher layer signaling, the CSI request field for the UE to trigger reporting of CSI of the CSI measurement hypothesis set of the first serving cell.
A third sending unit 24, configured to trigger reporting of CSI of the CSI measurement hypothesis set of the first serving cell by transmitting a CSI request field or by configuring, to the UE, the CSI request field in at least one of the following manners:
sending a time domain resource number of a physical layer uplink shared channel (PUSCH) carrying non-periodic feedback CSI;
numbering frequency domain resources; and
the serving cell number.
Before the UE receives the dynamic signaling, the base station 2 further includes:
a fourth sending unit 25, configured to send a third higher layer signaling to the UE, where the third higher layer signaling includes the second serving cell and a joint coding of a second measurement hypothesis corresponding to the second serving cell.
In this embodiment, the dynamic signaling includes downlink control information for uplink transmission or a corresponding acknowledgement for random access.
Further, the base station 2 further includes:
a fifth sending unit 26, configured to send the second dynamic signaling or the fifth higher layer signaling or the sixth higher layer signaling to the UE. The second dynamic signaling or the fifth high-level signaling or the sixth high-level signaling is used for configuring the UE whether the UE only transmits uplink control information in the current PUSCH report.
Further, the fifth sending unit 26 is further configured to send a seventh higher layer signaling to the UE. The seventh high layer signaling is used for configuring a third candidate threshold value and a fourth candidate threshold value for the UE.
Further, the base station 2 further includes:
a sixth sending unit 27, configured to send the third dynamic signaling or the eighth high layer signaling to the UE. And the third dynamic signaling or the eighth high-level signaling is used for configuring a modulation mode for the UE when only uplink control information is transmitted in the current PUSCH report.
The base station provided in this embodiment may use the corresponding aperiodic feedback method for triggering channel state information, for details, refer to the related description of the embodiment corresponding to fig. 3 for triggering aperiodic feedback of channel state information, and are not described herein again.
Those skilled in the art can understand that each unit included in the user equipment embodiment and the base station embodiment is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the application.
In summary, the embodiments of the present invention solve the problem of triggering aperiodic feedback based on multiple CSI measurement hypotheses in a CoMP system, and the problem of triggering aperiodic feedback based on multiple CSI measurement hypotheses in a multi-carrier and CoMP coexisting system, and lower feedback overhead.
All or part of the steps of the data caching method in the multi-node system provided by the embodiment of the invention can be completed through hardware related to program instructions. Such as may be accomplished by a computer running program. The program may be stored in a readable storage medium, such as a random access memory, a magnetic disk, an optical disk, or the like.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A method for triggering aperiodic feedback of channel state information, the method comprising:
receiving dynamic signaling, where the dynamic signaling is used to indicate a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, where a user equipment UE needs to feed back channel state information CSI, where the CSI measurement hypothesis set includes at least one measurement hypothesis, the measurement hypothesis includes at least one measurement reference signal, and the serving cell set includes at least one serving cell;
and feeding back CSI of the first serving cell based on the CSI measurement hypothesis set or CSI of the serving cell set based on the CSI measurement hypothesis set according to the dynamic signaling.
2. The method of claim 1, wherein the dynamic signaling comprises a CSI request field comprising a number N of bits, the N being an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
3. A method for triggering aperiodic feedback of channel state information, the method comprising:
sending dynamic signaling to a User Equipment (UE), wherein the dynamic signaling is used for indicating a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, which needs to feed back Channel State Information (CSI), of the UE, the CSI measurement hypothesis set comprises at least one measurement hypothesis, the measurement hypothesis comprises at least one measurement reference signal, and the serving cell set comprises at least one serving cell.
4. The method of claim 3, wherein the dynamic signaling comprises a CSI request field comprising a number N of bits, the N being an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
5. An apparatus for triggering aperiodic feedback of channel state information, the apparatus comprising a processor and a transceiver, wherein the processor is configured to:
receiving, by the transceiver, dynamic signaling indicating that a User Equipment (UE) needs to feed back a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set of Channel State Information (CSI), wherein the CSI measurement hypothesis set includes at least one measurement hypothesis, the measurement hypothesis includes at least one measurement reference signal, and the serving cell set includes at least one serving cell;
feeding back, with the transceiver, CSI for the first serving cell based on the CSI measurement hypothesis set or CSI for the serving cell set based on the CSI measurement hypothesis set according to the dynamic signaling.
6. The apparatus of claim 5, wherein the dynamic signaling comprises a CSI request field comprising a number N of bits, the N being an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
7. An apparatus for triggering aperiodic feedback of channel state information, the method comprising a processor and a transceiver, wherein the processor is configured to:
sending dynamic signaling to a User Equipment (UE) by using the transceiver, wherein the dynamic signaling is used for indicating a CSI measurement hypothesis set of a first serving cell or a CSI measurement hypothesis set of a serving cell set, which needs to feed back Channel State Information (CSI), of the UE, the CSI measurement hypothesis set comprises at least one measurement hypothesis, the measurement hypothesis comprises at least one measurement reference signal, and the serving cell set comprises at least one serving cell.
8. The apparatus of claim 7, wherein the dynamic signaling comprises a CSI request field comprising a number N of bits, the N being an integer greater than or equal to 1;
the dynamic signaling is used for indicating the CSI measurement hypothesis set of the first serving cell or the CSI measurement hypothesis set of the serving cell set that the UE needs to feed back the channel state information CSI, and includes:
the dynamic signaling indicates, through the CSI request field, to trigger reporting of CSI by the first serving cell based on the CSI measurement hypothesis set or indicates to trigger reporting of CSI by at least one second serving cell based on the CSI measurement hypothesis set by the serving cell set.
9. A computer-readable storage medium having computer instructions stored thereon that cause a communication device to perform the method of any of claims 1-4.
10. An apparatus for triggering aperiodic feedback of channel state information, the apparatus comprising a processor and a storage medium storing instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-4.
CN201910452262.4A 2012-05-11 2012-11-02 Method, UE, base station and system for triggering aperiodic feedback of channel state information Active CN110266432B (en)

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