Method and device for reducing complexity of channel quantization

Abstract

Embodiments of the present invention provide a method and device for reducing complexity of channel quantization. The method comprises: determining, on the basis of whether a measurement feedback parameter configured by a channel state information (CSI) process satisfies a predetermined condition, a CSI report time-domain position and a time interval requirement parameter Nrpt-ref for a CSI reference resource time-domain position, or determining a CSI trigger time-domain position and a time interval requirement parameter Nrpt-ref for a CSI reference resource time-domain position; determining, according to the determined time interval requirement parameter Nrpt-ref and the CSI report time-domain position, the CSI reference resource time-domain position, or determining, according to the determined time interval requirement parameter Nrpt-ref and the CSI trigger time-domain position, the CSI reference resource time-domain position; and performing CSI quantization according to the determined CSI reference resource time-domain position.

Claims

1. A method for reducing complexity of channel quantization, the method being applied to a terminal and comprising: determining a Channel State Information (CSI) report time-domain position and a time interval requirement parameter for a CSI reference resource time-domain position according to whether a measurement feedback parameter configured by a CSI process satisfies a first predetermined condition, or determining a CSI trigger time-domain position and an interval condition requirement parameter for the CSI reference resource time-domain position according to whether the measurement feedback parameter configured by the CSI process satisfies a second predetermined condition; determining the CSI reference resource time-domain position according to the determined time interval requirement parameter and CSI report time-domain position, or determining the CSI reference resource time-domain position according to the determined interval condition requirement parameter and CSI trigger time-domain position; and performing CSI quantization according to the determined CSI reference resource time-domain position, wherein the predetermined conditions comprise one of the following: a CSI feedback mode configured by the CSI process belongs to a set of CSI feedback modes; a codebook parameter configured by the CSI process belongs to a set of codebook parameters; a total number of ports for measuring a pilot configured by the CSI process belongs to a set of numbers of ports; or a number of pilots configured by the CSI process belongs to a set of numbers of pilots.

2. The method according to claim 1, after the CSI quantization is performed, further comprising: feeding back the quantized CSI.

3. The method according to claim 1, before determining the time interval requirement parameter or determining the interval condition requirement parameter, further comprising: according to a capability level of the terminal, or a duplex mode, or a frame structure type, or Precoding Matrix Indicator (PMI) enabling signaling, or a configured transmission mode, or a number of configured processes, or a number of triggered processes, or a configured feedback class, determining one of the following: a CSI feedback mode comprised in the set of CSI feedback modes; a codebook parameter comprised in the set of codebook parameters; a number of ports comprised in the set of the numbers of ports; or a number of pilots comprised in the set of the numbers of pilots.

4. The method according to claim 3, wherein when a plurality of processes are configured or triggered, the set of the numbers of ports is a union of the sets of the total number of ports for measuring the pilot corresponding to the plurality of processes.

5. The method according to claim 3, wherein when a plurality of processes are configured or triggered, the set of the numbers of pilots is a union of the sets of the number of pilots corresponding to the plurality of processes.

6. The method according to claim 1, wherein when the configured number of pilots is less than 4, the time interval requirement parameter is x; and when the configured number of pilots is greater than or equal to 4, the time interval requirement parameter is y, wherein x and y are integers, and y is greater than x.

7. A device for reducing complexity of channel quantization, which is set in a terminal, comprising a processor, a memory, and one or more modules stored on the memory and executable by the processor, the one or more modules comprising: a first determining module configured to: determine a Channel State Information (CSI) report time-domain position and a time interval requirement parameter for a CSI reference resource time-domain position according to whether a measurement feedback parameter configured by a CSI process satisfies a first predetermined condition, or determine a CSI trigger time-domain position and an interval condition requirement parameter for the CSI reference resource time-domain position according to whether the measurement feedback parameter configured by the CSI process satisfies a second predetermined condition; a second determining module configured to: determine the CSI reference resource time-domain position according to the determined time interval requirement parameter and CSI report time-domain position, or determine the CSI reference resource time-domain position according to the determined interval condition requirement parameter and CSI trigger time-domain position; and a quantization module configured to: perform CSI quantization according to the determined CSI reference resource time-domain position, wherein the predetermined conditions comprise one of the following: a CSI feedback mode configured by the CSI process belongs to a set of CSI feedback modes; a codebook parameter configured by the CSI process belongs to a set of codebook parameters; a total number of ports for measuring a pilot configured by the CSI process belongs to a set of numbers of ports; or a number of pilots configured by the CSI process belongs to a set of numbers of pilots.

8. The device according to claim 7, the one or more modules further comprising: a feedback module configured to feed back the quantized CSI.

9. The device according to claim 7, the one or more modules further comprising a setting module configured to determine, according to a capability level of the terminal, or a duplex mode, or a frame structure type, or Precoding Matrix Indicator (PMI) enabling signaling, or a configured transmission mode, or a number of configured processes, or a number of triggered processes, or a configured feedback class, one of the following: a CSI feedback mode comprised in the set of CSI feedback modes; a codebook parameter comprised in the set of codebook parameters; a number of ports comprised in the set of the numbers of ports; or a number of pilots comprised in the set of the numbers of pilots.

10. The device according to claim 9, wherein the setting module is further configured to, when a plurality of processes are configured or triggered, determine that the set of the numbers of ports is a union of the sets of the total number of ports for measuring the pilot corresponding to the plurality of processes.

11. The device according to claim 9, wherein the setting module is further configured to, when a plurality of processes are configured or triggered, determine that the set of the numbers of pilots is a union of the sets of the number of pilots corresponding to the plurality of processes.

12. A non-transitory computer readable storage medium, in which computable executable instructions are stored; the computable executable instructions are used for performing a method for reducing complexity of channel quantization, the method comprising: determining a Channel State Information (CSI) report time-domain position and a time interval requirement parameter for a CSI reference resource time-domain position according to whether a measurement feedback parameter configured by a CSI process satisfies a first predetermined condition, or determining a CSI trigger time-domain position and an interval condition requirement parameter for the CSI reference resource time-domain position according to whether the measurement feedback parameter configured by the CSI process satisfies a second predetermined condition; determining the CSI reference resource time-domain position according to the determined time interval requirement parameter and CSI report time-domain position, or determining the CSI reference resource time-domain position according to the determined interval condition requirement parameter and CSI trigger time-domain position; and performing CSI quantization according to the determined CSI reference resource time-domain position, wherein the predetermined conditions comprise one of the following: a CSI feedback mode configured by the CSI process belongs to a set of CSI feedback modes; a codebook parameter configured by the CSI process belongs to a set of codebook parameters; a total number of ports for measuring a pilot configured by the CSI process belongs to a set of numbers of ports; or a number of pilots configured by the CSI process belongs to a set of numbers of pilots.

13. The non-transitory computer readable storage medium according to claim 12, wherein after the CSI quantization is performed, the method further comprises: feeding back the quantized CSI.

14. The non-transitory computer readable storage medium according to claim 12, wherein before determining the time interval requirement parameter or determining the interval condition requirement parameter, the method further comprises: according to a capability level of a terminal, or a duplex mode, or a frame structure type, or Precoding Matrix Indicator (PMI) enabling signaling, or a configured transmission mode, or a number of configured processes, or a number of triggered processes, or a configured feedback class, determining one of the following: a CSI feedback mode comprised in the set of CSI feedback modes; a codebook parameter comprised in the set of codebook parameters; a number of ports comprised in the set of the numbers of ports; or a number of pilots comprised in the set of the numbers of pilots.

15. The non-transitory computer readable storage medium according to claim 14, wherein when a plurality of processes are configured or triggered, the set of the numbers of ports is a union of the sets of the total number of ports for measuring the pilot corresponding to the plurality of processes.

16. The non-transitory computer readable storage medium according to claim 14, wherein when a plurality of processes are configured or triggered, the set of the numbers of pilots is a union of the sets of the number of pilots corresponding to the plurality of processes.

17. The non-transitory computer readable storage medium according to claim 12, wherein when the configured number of pilots is less than 4, the time interval requirement parameter is x; and when the configured number of pilots is greater than or equal to 4, the time interval requirement parameter is y, wherein x and y are integers, and y is greater than x.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 illustrates a flowchart of a method for reducing complexity of channel quantization according to embodiment 1 of the disclosure.

(2) FIG. 2 illustrates a structure diagram of a device for reducing complexity of channel quantization according to embodiment 2 of the disclosure.

(3) FIG. 3 illustrates a structure diagram of another device for reducing complexity of channel quantization according to embodiment 2 of the disclosure.

(4) FIG. 4 illustrates a structure diagram of another device for reducing complexity of channel quantization according to embodiment 2 of the disclosure.

DETAILED DESCRIPTION

(5) Embodiments of the present disclosure are elaborated below in combination with the accompanying drawings. It is to be noted that the embodiments and the features in the embodiments of the application can be combined with each other under the condition of no conflicts.

Embodiment 1

(6) As shown in FIG. 1, the embodiment of the disclosure provides a method for reducing complexity of channel quantization, which is applied to the terminal and includes the following steps.

(7) At S1, the CSI report time-domain position and the time interval requirement parameter N.sub.rpt-ref for the CSI reference resource time-domain position are determined according to whether the measurement feedback parameter configured by the CSI process satisfies the first predetermined condition, or the CSI trigger time-domain position and the interval condition requirement parameter N.sub.trg-ref for the CSI reference resource time-domain position are determined according to whether the measurement feedback parameter configured by the CSI process satisfies the second predetermined condition.

(8) At S2, the CSI reference resource time-domain position is determined according to the determined time interval requirement parameter N.sub.rpt-ref and CSI report time-domain position, or the CSI reference resource time-domain position is determined according to the determined interval condition requirement parameter N.sub.trg-ref and CSI trigger time-domain position.

(9) At S3, the CSI quantization is performed according to the determined CSI reference resource time-domain position.

(10) According to an embodiment, the predetermined conditions include one of the followings:

(11) the feedback mode configured by the CSI process, belongs to the set of feedback modes S1;

(12) the codebook parameter configured by the CSI process, belongs to the set of codebook parameters S2;

(13) the total number of ports for measuring the pilot, which is configured by the CSI process, belongs to the set of the numbers of ports S3; or

(14) the number of pilots K configured by the CSI process, belongs to the set of the numbers of pilots S4.

(15) Both the first predetermined condition and the second predetermined condition may be selected from the above scope. The first predetermined condition and the second predetermined condition may be the same or different.

(16) According to an embodiment, after the CSI quantization is performed, the method further includes that: the quantized CSI is fed back.

(17) According to an embodiment, before the time interval requirement parameter N.sub.rpt-ref or the interval condition requirement parameter N.sub.trg-ref is determined, the method further includes the following steps. According to the capability level of the terminal, or the duplex mode, or the frame structure type, or the PMI enabling signaling, or the configured transmission mode, or the number of configured processes, or the number of triggered processes, or the configured feedback class, one of the followings is determined:

(18) the feedback mode included in the set of feedback modes S1;

(19) the codebook parameter included in the set of codebook parameters S2;

(20) the number of ports included in the set of the numbers of ports S3; or

(21) the number of pilots included in the set of the numbers of pilots S4.

(22) According to an embodiment, when multiple processes are configured or triggered, the set of the numbers of ports S3 is an union of the sets of the total number of ports for measuring the pilot corresponding to the multiple processes.

(23) According to an embodiment, when multiple processes are configured or triggered, the set of the numbers of pilots S4 is an union of the sets of the number of pilots corresponding to the multiple processes.

(24) According to an embodiment, when the configured number of pilots K is less than 4, the time interval requirement parameter N.sub.rpt-ref is x. When the configured number of pilots K is greater than or equal to 4, the time interval requirement parameter N.sub.rpt-ref is y. The x and the y are integers, and the y is greater than x.

Embodiment 2

(25) As shown in FIG. 2, the embodiment provides a device for reducing complexity of channel quantization, which is set in the terminal and includes a first determining module 21, a second determining module 22 and the quantization module 23.

(26) The first determining module 21 is configured to determine the CSI report time-domain position and the time interval requirement parameter N.sub.rpt-ref for the CSI reference resource time-domain position according to whether the measurement feedback parameter configured by the CSI process satisfies the first predetermined condition, or determine the CSI trigger time-domain position and the interval condition requirement parameter N.sub.trg-ref for the CSI reference resource time-domain position according to whether the measurement feedback parameter configured by the CSI process satisfies the second predetermined condition.

(27) The second determining module 22 is configured to determine the CSI reference resource time-domain position according to the determined time interval requirement parameter N.sub.rpt-ref and CSI report time-domain position, or determine the CSI reference resource time-domain position according to the determined interval condition requirement parameter N.sub.trg-ref and CSI trigger time-domain position.

(28) The quantization module 23 is configured to perform the CSI quantization according to the determined CSI reference resource time-domain position.

(29) According to an embodiment, as illustrated in FIG. 3, the device further includes a feedback module 24 configured to feed back the quantized CSI.

(30) According to an embodiment, as illustrated in FIG. 4, the device further includes a setting module 25. The setting module 25 is configured to determine, according to the capability level of the terminal, or the duplex mode, or the frame structure type, or the PMI enabling signaling, or the configured transmission mode, or the number of configured processes, or the number of triggered processes, or the configured feedback class, one of the followings:

(31) the feedback mode included in the set of feedback modes S1;

(32) the codebook parameter included in the set of codebook parameters S2;

(33) the number of ports included in the set of the numbers of ports S3; or

(34) the number of pilots included in the set of the numbers of pilots S4.

(35) According to an embodiment, the setting module 25 is further configured to, when multiple processes are configured or triggered, determine that the set of the numbers of ports S3 is an union of the sets of the total number of ports for measuring the pilot corresponding to the multiple processes.

(36) According to an embodiment, the setting module 25 is further configured to, when multiple processes are configured or triggered, determine that the set of the numbers of pilots S4 is an union of the sets of the number of pilots corresponding to the multiple processes.

(37) An illustration is given below through several application embodiments.

Application Embodiment 1

(38) In a Multiple Input Multiple Output (MIMO) system, a flow that the terminal measures and feeds back the CSI includes the following steps.

(39) At S101, the terminal determines whether it is needed to report the CSI periodically or aperiodically. If there is the CSI needing to be reported, S102 is performed. If not, the flow is ended.

(40) At S102, the terminal determines the class of the CSI needing to be fed back and a position of reporting the CSI.

(41) The periodical CSI generally does not need extra dynamic trigger signaling, but the aperiodical CSI needs to be triggered in downlink control signaling. After trigger, the terminal performs CSI calculation, and reports the CSI after some subframes.

(42) There are many CSI classes, mainly including the RI, the PMI, the CQI and the CRI.

(43) The CSI feedback class is generally determined according to the CSI process and its corresponding feedback mode, and the feedback mode defines a combination of the CSI (the CQI, the PMI, and the RI) feedback classes. In the embodiment, the CSI feedback class is determined by a feedback granularity, a feedback position and feedback content. Herein, an aperiodical feedback is transmitted on a Physical Uplink Shared Channel (PUSCH), including the mode shown in Table 1. A periodical feedback mode is the mode periodically performing feedback on a Physical Uplink Control Channel (PUCCH), including the mode shown in Table 2.

(44) TABLE-US-00001 TABLE 1 PMI feedback class Single Multiple No PMI PMI PMIs PUSCH CQI Broadband Mode 1-2 feedback class (broadband CQI) UE selection Mode 2-0 Mode 2-2 (sub-band CQI) High-level Mode 3-0 Mode 3-1 Mode 3-2 configuration (sub-band CQI)

(45) TABLE-US-00002 TABLE 2 PMI feedback class No PMI Single PMI PUCCH CQI Broadband Mode 1-0 Mode 1-1 Feedback class (broadband CQI) UE selection Mode 2-0 Mode 2-1 (sub-band CQI)

(46) The above feedback modes define the content of the CSI needing to be fed back by the terminal, referring to the LTE physical layer protocol specification TS 36.213. The feedback modes which can be configured in different transmission modes are not completely the same, and each transmission mode corresponds to a candidate set of feedback modes which can be configured.

(47) At S103, the terminal determines a reference resource corresponding to this CSI feedback.

(48) Generally, the reference resource is a reference object of the CSI quantization, and a reference resource position may be comparatively fixed, and has a certain relationship with the position of reporting the CSI (the N.sub.rpt subframe) or a position of triggering the CSI N.sub.trg (corresponding to an aperiodical CSI report). For example, when a single CSI process is configured, the reference resource position is the subframe satisfying the following conditions:

(49) condition 1: the subframe is at the (N.sub.rpt-N.sub.rpt-ref)th subframe or before it;

(50) condition 2: the subframe is valid (the definition about the subframe is valid may refer to the protocol TS 36.213 of the 3GPP);

(51) condition 3: the subframe is nearest to the position of reporting the CSI when the other conditions are satisfied;

(52) N.sub.rpt-ref=m, and the m is greater than 0; for example, it may be 8; a frequency-domain position is some Resource Blocks (RB) or subbands corresponding to the CSI.

(53) If it is the aperiodical feedback, the reference resource position may also be the subframe satisfying the following conditions:

(54) condition 4: the subframe is at the (N.sub.trg-N.sub.trg-ref)th subframe or before it;

(55) condition 5: the subframe is valid (the definition about the subframe is valid may refer to the protocol TS 36.213 of the 3GPP);

(56) condition 6: the subframe is nearest to the position of triggering the CSI when the other conditions are satisfied;

(57) N.sub.trg-ref=n, and the n is an integer; for example, it may be 4.

(58) At S104, the terminal may perform a channel estimation, PMI quantization, a CQI calculation, and a rank calculation of a channel after determining the reference resource position of the CSI; if there are multiple CSI-RSs configured, the terminal may perform a CSI-RS selection, and report selected CRI information to the base station.

(59) In the above process, when a value of the N.sub.rpt-ref or the N.sub.trg-ref is determined according to different conditions, the N.sub.rpt-ref or the N.sub.trg-ref may be set to a fixed value; that is, for many cases, there are multiple corresponding fixed values.

Application Embodiment 2

(60) At S201, the base station configures the feedback of class A or the feedback of class B for the terminal, and sets two values of the N.sub.rpt-ref, that is, the N.sub.rpt-ref is equal to m1 and m2; or the base station sets two values of the N.sub.trg-ref, that is, the N.sub.trg-ref is equal to n1 and n2.

(61) At S202, the terminal determines whether the following condition is satisfied; when the condition is satisfied, the terminal determines that the value of the N.sub.rpt-ref is m1; when the condition is not satisfied, the terminal determines that the value of the N.sub.rpt-ref is m2; or, when the condition is satisfied, the terminal determines that the value of the N.sub.trg-ref is n1, and when the condition is not satisfied, the terminal determines that the value of the N.sub.trg-ref is n2.

(62) In the embodiment, the condition is set as the feedback mode configured by the CSI process belongs to the set of feedback modes S1 agreed with the base station.

(63) Herein, the S1 is a set; for example, it may be {Mode 3-2}, or {Mode 3-1, Mode 3-2}, or {Mode 1-2, Mode 3-2}, or {Mode 3-1, Mode 1-2, Mode 3-2}, and so on.

(64) According to an embodiment, the S1 may be an agreed fixed set.

(65) According to an embodiment, the S1 may also be determined according to the capability level of the terminal, and the terminals with different capability levels correspond to different sets S1. For example, for the terminal with high capability level, the set S1 may be set to a null set, that is, this terminal may work according to the value of the N.sub.rpt-ref being m2 or the value of the N.sub.trg-ref being n2 anytime.

(66) According to an embodiment, the S1 may also be determined by the terminal according to the duplex mode, or the frame structure type, or the PMI enabling signaling. The sets S1 corresponding to the different duplex modes may be different, the sets S1 corresponding to the different frame structure types may be different, and the sets S1 corresponding to enabling or disabling PMI configuration may be different.

(67) According to an embodiment, the S1 may also be determined according to the number of the CSI processes. The sets S1 corresponding to a situation of one CSI process and a situation of multiple CSI processes may be different.

(68) According to an embodiment, the S1 may also be determined according to the transmission mode. The sets S1 corresponding to the different transmission modes may be different.

(69) According to an embodiment, the S1 may also be determined according to the class. The sets S1 respectively corresponding to the class A, the class B and a situation where the class is not configured may be different.

(70) At S203, after determining the values of the N.sub.rpt-ref and the N.sub.trg-ref, the terminal may determine the CSI reference resource time-domain position according to the determined N.sub.rpt-ref and CSI report time-domain position, or determine the CSI reference resource time-domain position according to the determined N.sub.trg-ref and CSI trigger time-domain position.

(71) At S204, the CSI quantization and feedback is performed according to the determined CSI reference resource time-domain position.

Application Embodiment 3

(72) At S301, the base station configures the feedback of class A or the feedback of class B corresponding to multiple pilots for the terminal, and sets two values of the N.sub.rpt-ref, that is, the N.sub.rpt-ref is equal to m1 and m2; or the base station sets two values of the N.sub.trg-ref, that is, the N.sub.trg-ref is equal to n1 and n2.

(73) At S302, the terminal determines whether the following condition is satisfied; when the condition is satisfied, the terminal determines that the value of the N.sub.rpt-ref is m1; when the condition is not satisfied, the terminal determines that the value of the N.sub.rpt-ref is m2; or, when the condition is satisfied, the terminal determines that the value of the N.sub.trg-ref is n1, and when the condition is not satisfied, the terminal determines that the value of the N.sub.trg-ref is n2.

(74) In the embodiment, the condition is set as the codebook parameter configured by the CSI process belongs to the set of codebook parameters S2 agreed with the base station.

(75) Herein, the codebook parameters mainly include the following parameters:

(76) a first dimension N1, a second dimension N2, a first dimensional vector density O1, a second dimensional vector density O2, a sub-codebook selection, and a parameter about a limit to the number of code words.

(77) Herein, the S2 is a set; for example, it may be {all codebooks that N1*N2 is configured to be greater than 8}, or {all possible codebooks that N1*N2*O1*O2 is configured to be greater than or equal to 32}, or {all possible codebooks that N1*N2*O1*O2 is configured to be greater than or equal to 32 and the sub-codebook selection is 2, 3, 4}, or {all codebooks that the total number of code words is greater than 256}.

(78) According to an embodiment, the S2 may be an agreed fixed set.

(79) According to an embodiment, the S2 may also be determined according to the capability level of the terminal, and the terminals with different capability levels correspond to different sets S2. For example, for the terminal with high capability level, the set S2 may be set to the null set, that is, this terminal may work according to the value of the N.sub.rpt-ref being m2 or the value of the N.sub.trg-ref being n2 anytime.

(80) According to an embodiment, the S2 may also be determined by the terminal according to the duplex mode, or the frame structure type, or the PMI enabling signaling. The sets S2 corresponding to the different duplex modes may be different, the sets S2 corresponding to the different frame structure types may be different, and the sets S2 corresponding to enabling or disabling PMI configuration may be different.

(81) According to an embodiment, the S2 may also be determined according to the number of the CSI processes. The sets S2 corresponding to the situation of one CSI process and the situation of multiple CSI processes may be different.

(82) According to an embodiment, the S2 may also be determined according to the transmission mode. The sets S2 corresponding to the different transmission modes may be different.

(83) According to an embodiment, the S2 may also be determined according to the class. The sets S2 respectively corresponding to the class A and the class B may be different.

(84) At S303, after determining the values of the N.sub.rpt-ref and the N.sub.trg-ref, the terminal may determine the CSI reference resource time-domain position according to the determined N.sub.rpt-ref and CSI report time-domain position, or determine the CSI reference resource time-domain position according to the determined N.sub.trg-ref and CSI trigger time-domain position.

(85) At S304, the CSI quantization and feedback is performed according to the determined CSI reference resource time-domain position.

Application Embodiment 4

(86) At S401, the base station configures the feedback of class A or the feedback of class B for the terminal, and sets two values of the N.sub.rpt-ref, that is, the N.sub.rpt-ref is equal to m1 and m2; or the base station sets two values of the N.sub.trg-ref, that is, the N.sub.trg-ref is equal to n1 and n2.

(87) At S402, the terminal determines whether the following condition is satisfied; when the condition is satisfied, the terminal determines that the value of the N.sub.rpt-ref is m1; when the condition is not satisfied, the terminal determines that the value of the N.sub.rpt-ref is m2; or, when the condition is satisfied, the terminal determines that the value of the N.sub.trg-ref is n1, and when the condition is not satisfied, the terminal determines that the value of the N.sub.trg-ref is n2.

(88) In the embodiment, the condition is set as the total number of ports for measuring the pilot belongs to the set of the numbers of ports S3 agreed with the base station.

(89) Herein, the S3 may be, for example, {the number of configurable ports being greater than 8}, or {the number of configurable ports being greater than or equal to 8}, or {the number of configurable ports being greater than 12}, or {the number of configurable ports being greater than or equal to 12}, or {the number of configurable ports being greater than 16}, or {the number of configurable ports being greater than or equal to 16}.

(90) According to an embodiment, if a process is configured or triggered, the total number of ports for measuring the pilot of the process is counted.

(91) According to an embodiment, if many processes are configured or triggered, the total number of ports for measuring the pilot of the multiple processes is counted jointly.

(92) According to an embodiment, the S3 may be an agreed fixed set.

(93) According to an embodiment, the S3 may also be determined according to the capability level of the terminal, and the terminals with different capability levels correspond to different sets S3. For example, for the terminal with high capability level, the set S3 may be set to the null set, that is, this terminal may work according to the value of the N.sub.rpt-ref being m2 or the value of the N.sub.trg-ref being n2 anytime.

(94) According to an embodiment, the S3 may also be determined by the terminal according to the duplex mode, or the frame structure type, or the PMI enabling signaling. The sets S3 corresponding to the different duplex modes may be different, the sets S3 corresponding to the different frame structure types may be different, and the sets S3 corresponding to enabling or disabling PMI configuration may be different.

(95) According to an embodiment, the S3 may also be determined according to the number of the CSI processes. The sets S3 corresponding to the situation of one CSI process and the situation of multiple CSI processes may be different.

(96) According to an embodiment, the S3 may also be determined according to the class. The sets S3 respectively corresponding to the class A and the class B may be different.

(97) According to an embodiment, the S3 may also be determined according to the transmission mode. The sets S3 corresponding to the different transmission modes may be different.

(98) At S403, after determining the values of the N.sub.rpt-ref and the N.sub.trg-ref, the terminal may determine the CSI reference resource time-domain position according to the determined N.sub.rpt-ref and CSI report time-domain position, or determine the CSI reference resource time-domain position according to the determined N.sub.trg-ref and CSI trigger time-domain position.

(99) At S404, the CSI quantization and feedback is performed according to the determined CSI reference resource time-domain position.

Application Embodiment 5

(100) At S501, the base station configures the feedback of class A or the feedback of class B for the terminal, and sets two values of the N.sub.rpt-ref, that is, the N.sub.rpt-ref is equal to m1 and m2; or the base station sets two values of the N.sub.trg-ref, that is, the N.sub.trg-ref is equal to n1 and n2.

(101) At S502, the terminal determines whether the following condition is satisfied; when the condition is satisfied, the terminal determines that the value of the N.sub.rpt-ref is m1; when the condition is not satisfied, the terminal determines that the value of the N.sub.rpt-ref is m2; or, when the condition is satisfied, the terminal determines that the value of the N.sub.trg-ref is n1, and when the condition is not satisfied, the terminal determines that the value of the N.sub.trg-ref is n2, wherein the n2 is greater than the n1, or the n2 is less than the n1.

(102) In the embodiment, the condition is set as the number of pilots K belongs to the set of the numbers of pilots S4 agreed with the base station.

(103) Herein, the S4 may be, for example, {numbers greater than 4}, or {numbers greater than or equal to 4}, or {numbers greater than 2}.

(104) According to an embodiment, if a process is configured or triggered, the number of pilots of the process is counted.

(105) According to an embodiment, if many processes are configured or triggered, the number of pilots of the multiple processes is counted jointly.

(106) According to an embodiment, the S4 may be an agreed fixed set.

(107) According to an embodiment, the S4 may also be determined according to the capability level of the terminal, and the terminals with different capability levels correspond to different sets S4. For example, for the terminal with high capability level, the set S4 may be set to the null set, that is, this terminal may work according to the value of the N.sub.rpt-ref being m2 or the value of the N.sub.trg-ref being n2 anytime.

(108) According to an embodiment, the S4 may also be determined by the terminal according to the duplex mode, or the frame structure type, or the PMI enabling signaling. The sets S4 corresponding to the different duplex modes may be different, the sets S4 corresponding to the different frame structure types may be different, and the sets S4 corresponding to enabling or disabling PMI configuration may be different.

(109) According to an embodiment, the S4 may also be determined according to the number of the CSI processes. The sets S4 corresponding to the situation of one CSI process and the situation of multiple CSI processes may be different.

(110) According to an embodiment, the S4 may also be determined according to the transmission mode. The sets S4 corresponding to the different transmission modes may be different.

(111) According to an embodiment, the S4 may also be determined according to the class. The sets S4 respectively corresponding to the class A and the class B may be different.

(112) At S503, after determining the values of the N.sub.rpt-ref and the N.sub.trg-ref, the terminal may determine the CSI reference resource time-domain position according to the determined N.sub.rpt-ref and CSI report time-domain position, or determine the CSI reference resource time-domain position according to the determined N.sub.trg-ref and CSI trigger time-domain position.

(113) At S504, the CSI quantization and feedback is performed according to the determined CSI reference resource time-domain position.

Application Example 6

(114) In the above application examples, determining conditions may be set jointly; for example, the following conditions need to be satisfied simultaneously:

(115) the feedback mode configured by the CSI process belongs to the set of feedback modes S1 agreed with the base station and the codebook parameter configured by the CSI process belongs to the set of codebook parameters S2 agreed with the base station; or

(116) the feedback mode configured by the CSI process belongs to the set of feedback modes S1 agreed with the base station and the total number of ports for measuring the pilot configured by the CSI process belongs to the set of the numbers of ports S3 agreed with the base station; or

(117) the feedback mode configured by the CSI process belongs to the set of feedback modes S1 agreed with the base station and the number of pilots K configured by the CSI process belongs to the set of the numbers of pilots S4 agreed with the base station; or

(118) the total number of ports for measuring the pilot configured by the CSI process belongs to the set of the numbers of ports S3 agreed with the base station and the number of pilots K configured by the CSI process belongs to the set of the numbers of pilots S4 agreed with the base station.

(119) The embodiments of the disclosure improve the determining of the CSI reference resource position. The greater a time interval between the CSI reference resource position and report, the lower the complexity of the terminal, and for some situations requiring high calculation complexity, it is needed to lower this requirement, but it does not mean that the time interval needs to be increased anytime. It is needed to avoid some cases where increasing the time interval may cause the significant performance loss; and in some cases, actually the UE does not face much calculation pressure on channel measurement and quantization, so it is needed to make a distinction among the cases.

(120) Those of ordinary skill in the art should understand that the technical solutions of the disclosure can be modified or replaced equivalently without departing from their spirit and scope; and these modifications and equivalent replacements shall fall within the scope of claims of the disclosure.

(121) Those ordinary skilled in the art may understand that all or some of the steps in the above method disclosed, the system, the functional modules/units in the device may be implemented as software, firmware, hardware and a proper combination of them. According to an embodiment of hardware, the division among the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical units; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in coordination. Some or all of the components may be implemented as software performed a processor, for example, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, for example, an application-specific integrated circuit. Such software may be distributed on computer readable media. The computer readable media may include computer storage media (or non-temporary media) and communication media (or temporary media). As those ordinary skilled in the art know, the term computer storage media include volatile and non-volatile media, and removable and un-removable media which are implemented in any method or technology for storing information (such as a computer readable instruction, a data structure, a program module or other data). The computer storage media include, but not limited to, an RAM, an ROM, an EEPROM, a flash memory or other memory technologies, a CD-ROM, a Digital Video Disk (DVD) or other optical storage, a cartridge, a tape, a disk storage or other magnetic storage devices, or any other media which may be used for storing expected information and may be accessed by a computer. Moreover, as those ordinary skilled in the art know, the communication media generally include the computer readable instruction, the data structure, the program module or other data, such as carriers or other transmission mechanisms, in a modulation data signal, and may include any information delivery media.

INDUSTRIAL APPLICABILITY

(122) The solution provided by the disclosure achieves an optimal tradeoff between the performance loss and complexity according to the current conditions; through the solution, there is no significant performance loss while a benefit of complexity reduction is obtained, and the complexity of terminal is reduced, thereby reducing the cost of the terminal indirectly.