WO2014019173A1

WO2014019173A1 - Method and apparatus for determining channel state information reference resource

Info

Publication number: WO2014019173A1
Application number: PCT/CN2012/079511
Authority: WO
Inventors: 徐海博; 王轶
Original assignee: 富士通株式会社
Priority date: 2012-08-01
Filing date: 2012-08-01
Publication date: 2014-02-06
Also published as: CN104396169A

Abstract

A method and an apparatus for determining a channel state information (CSI) reference resource. The method comprises: when receiving DCI that is sent by a network side in a serving cell in a configured serving cell and triggers a terminal device to report CSI of one or more serving cells in the configured serving cell, and determining time for reporting the CSI, the terminal device determining that a CSI time domain reference resource of the serving cell whose CSI needs to be reported is: before the reporting time, a downlink sub-frame on the serving cell whose CSI needs to be reported and K1-1 sub-frames away from sub-frame n corresponding to the reporting time. A value of K1 is a value, in a value range [4, k], satisfying a condition that the downlink sub-frame is a valid downlink sub-frame; K1 and K are integers greater than 0; and n is an integer greater than or equal to 0. In this way, a valid downlink sub-frame may be found with more chances, so that a value of the measured CSI can reflect CSI at the reporting time more accurately.

Description

Method and device for determining channel state information reference resource

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for determining channel state information reference resources. Background technique

In a Long Term Evolution (LTE) system, a user equipment (UE) reports channel state information (CSI) to a base station to help a base station perform downlink resource allocation to a UE. A common reference signal (CRS, Common Reference Signal) to obtain the value of the CSI, the UE needs to measure downlink subframes or a channel state information reference signal (CSI-RS, CSI Reference Signal ) 0

In the LTE system, reference resources of CSI are defined from the frequency domain, the time domain, and the air domain, respectively, to guide measurement of channel quality information of the UE. For the CSI reported at time n, from the time domain perspective, its CSI reference resource is defined as the downlink subframe "-" ^ee - ^re/ . For the aperiodic CSI triggered by the downlink control information (DCI, Downlink Control Information), the value of ^η ^ - ^ is such that the downlink subframe is a downlink subframe of the DCI that sends the trigger CSI, and the downlink subframe is only a valid downlink sub-frame. In the case of a frame, the UE will report CSI at time η. Otherwise, the UE does not report CSI at time M. For a downlink subframe, the condition that it is regarded as a valid downlink subframe is: (1) the subframe is configured as a downlink subframe and (2) the subframe is not a multimedia broadcast multicast service single frequency network (MBSFN, Multicast Broadcast Single Frequency Network) Subframe and, (3) If the length of the downlink pilot time slot (DwPTS) is less than or equal to ^ ⁸ ^ ⁷ ^ (where ^ is the basic time unit, its length is 1/(15000*2048) seconds ), the subframe does not contain the DwPTS and, (4) the subframe is not within the measurement interval and (5) for the periodic CSI, if the UE configures the CSI subframe set, the subframe belongs to the associated sub-CSI Frame set.

However, in the process of implementing the present invention, the inventor has found that in the foregoing method for determining a CSI reference resource, the time domain reference resource can only select a certain downlink subframe fixedly, and once the determined reference resource is an invalid downlink subframe, the terminal The device will not report the CSI, which affects the downlink resource allocation of the base station to the UE. Currently, there is no effective method for solving the above problem.

It should be noted that the above description of the technical background is only for the convenience of the technical solution of the present invention. A complete description is provided to facilitate the understanding of those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention. Summary of the invention

An object of the embodiments of the present invention is to provide a method for determining a channel state information reference resource and a device thereof, so that the terminal device has more opportunities to find a valid downlink subframe, and the measured CSI value can accurately reflect the report. Channel state information at the moment.

According to an aspect of an embodiment of the present invention, a method for determining a channel state information reference resource is provided, the method comprising:

And transmitting, by the receiving network, the downlink control information of the channel state information of the one or more serving cells in the configured serving cell, and determining to report the channel state information, by using the triggering terminal device that is sent by the receiving terminal on the one of the configured serving cells At the time of the reporting, the terminal device determines the channel state information of the serving cell that needs to report the channel state information, and the time domain reference resource is: before the reporting time, on the serving cell that needs to report the channel state information, corresponding to the reporting time The subframe w is separated from the downlink subframe of the subframe;

The value of W is the interval [4, which satisfies the minimum value of the downlink subframe as a valid downlink subframe; W and ^: are positive integers greater than zero; w is an integer greater than or equal to zero.

Another aspect of the present invention provides an apparatus for determining a channel state information reference resource, the apparatus comprising:

a first processing unit, configured to report channel state information of one or more serving cells in the configured serving cell to a triggering terminal device sent by the receiving network on a serving cell in the configured serving cell When the downlink control information is determined, and the reporting time of the channel state information is determined, the channel state information of the serving cell that needs to report the channel state information is determined as: the service that needs to report the channel state information before the reporting time The subframe w corresponding to the reporting time on the cell is separated by a downlink subframe of W - 1 subframe;

The value of W is the interval [4, which satisfies the minimum value of the downlink subframe as a valid downlink subframe; and ^: is a positive integer greater than zero; w is an integer greater than or equal to zero.

According to another aspect of the present invention, there is provided a terminal device comprising a processing unit, the processing unit comprising the apparatus for determining a channel state information reference resource.

According to another aspect of the embodiments of the present invention, a network system includes a base station and a terminal device, where The downlink control information used by the base station to report the channel state information of the one or more serving cells in the configured serving cell by using the triggering terminal device sent by the terminal device in the serving cell configured for the terminal device; Determining a channel state information time domain reference resource of a serving cell that needs to report channel state information, and the configuration of the terminal device is as described above.

According to another aspect of an embodiment of the present invention, a computer readable program is provided, wherein when the program is executed in a device that determines channel state information reference resources, the program causes a computer to refer to a resource in the device for determining channel state information The method of determining the channel state information reference resource is performed as described above.

According to another aspect of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the determining of a channel state information reference resource in an apparatus for determining a channel state information reference resource method.

The beneficial effects of the embodiments of the present invention are as follows: The foregoing technical solution is adopted, so that the terminal device may have more opportunities to find a valid downlink subframe; and the reference resource may select a downlink with a shorter interval of the uplink subframe reported by the CSI. The subframe is such that the measured value of the CSI can accurately reflect the channel state information at the reporting time.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, which illustrate the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising", when used herein, refers to the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS

The above and other objects, features and advantages of the embodiments of the present invention will become more <RTIgt;

1 is a flowchart of a method for determining channel state information reference resources according to Embodiment 1 of the present invention;

2 is a block diagram of a device for determining a channel state information reference resource according to Embodiment 2 of the present invention;

3 is a block diagram of a device for determining a channel state information reference resource according to Embodiment 3 of the present invention; Figure 4 is a block diagram showing the configuration of a terminal device according to Embodiment 4 of the present invention;

5 is a first exemplary diagram of determining channel state information reference resources;

6 is a second exemplary diagram of determining channel state information reference resources. detailed description

Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention. In order to enable a person skilled in the art to easily understand the principles and embodiments of the present invention, the embodiment of the present invention is described by taking the method for determining the CSI reference resource of the LTE/LTE-A system as an example, but it can be understood that the present invention does not Limited to the above system, it is applicable to other systems involved in determining the CSI reference resource method.

An embodiment of the present invention provides a method for determining a reference resource of a channel state information, where the terminal device receives one or more of the serving cells that are triggered by the terminal device and are sent by one of the serving cells in the configured serving cell. Determining the channel state information of the serving cell that needs to report the channel state information when the downlink control information of the channel state information of the serving cell is determined and determining the reporting time of the channel state information is: Before the reporting time, The subframe n corresponding to the reporting time on the serving cell that reports the channel state information is separated by a downlink subframe of ki - 1 subframe;

In this embodiment, in general, "the downlink subframe of the subframes corresponding to the reporting time" is represented as "downlink subframe" - " before the reporting time", which also refers to the reporting time. The corresponding subframe n starts to advance by several Id subframes.

In this embodiment, the value can be determined according to a preset working mode.

For example, for frequency division duplex (FDD) operation, k = 4 _;

For the working mode of time division duplex (TDD), the following methods can be used:

1) determining, according to the uplink/downlink configuration information of the one serving cell that sends the DCI, the subframe number corresponding to the receiving time of receiving the downlink control information, and the predetermined fourth uplink scheduling timing relationship;

For example, in the LTE system, the uplink scheduling relationship relationship for the time division duplex working mode is defined in advance, as shown in Table 1 below, so that the value of the ^: value can be determined according to the uplink scheduling timing relationship. The uplink/downlink configuration information of the one serving cell that sends the DCI and the subframe number corresponding to the receiving time of receiving the downlink control information The corresponding ^: value can be found in Table 1.

2) For the time division duplex mode of operation, the subframe number corresponding to the receiving time of the downlink control information and the predetermined fifth uplink scheduling timing relationship may be received according to the uplink/downlink configuration information of the serving cell that sends the channel state information. To determine the k value. The fifth uplink scheduling timing relationship is as shown in Table 1. When determining the value, the uplink/downlink configuration information used is different.

In this way, for aperiodic CSI reporting, the opportunity for selecting the time domain reference resource is enhanced as follows: 1) The terminal device may have more opportunities to find a valid downlink subframe, thereby reducing the probability that the terminal device cannot report CSI. 2) The time domain reference resource can select a downlink subframe that is shorter than the uplink subframe interval of the CSI, so that the measured CSI value can accurately reflect the channel state information at the reporting time.

Table 1

The embodiments of the present invention are described below with reference to the accompanying drawings.

1 is a flowchart of a method for determining channel state information reference resources according to Embodiment 1 of the present invention. As shown in FIG. 1 , the method is used for aperiodic channel state information triggered by downlink control information. For one of the configured one or more serving cells, the method includes:

Step 101: Receive downlink control information (CSI) of channel state information (CSI) that is sent by one of the serving cells in the configured serving cell to trigger the terminal device to report the one or more serving cells in the configured serving cell. ).

Step 102: Determine a reporting time for reporting the CSI.

In this embodiment, the reporting time of reporting the CSI may be determined in the following manner:

1) determining, for the frequency division duplex mode of operation, the reporting time of reporting the channel state information CSI according to the receiving time of receiving the downlink control information DCI and the predetermined first uplink scheduling timing relationship; In this embodiment, in the LTE system, the first row scheduling timing relationship is a fixed value, that is, 4, and the reporting time is: the uplink of the next 4 subframes starts from the subframe corresponding to the receiving moment. Subframe.

2) For the time division duplex mode, the reporting time can be determined as follows:

And determining, according to the uplink/downlink configuration information (UL/DL Configuration) of the serving cell that sends the downlink control information DCI, the reception time of the downlink control information DCI and the predetermined second uplink scheduling timing relationship to determine the reporting time of the information state information. ;

The following examples are given. Table 1 is the uplink scheduling timing relationship diagram. For example, if the configuration of the serving cell that sends the DCI is configuration 1, and the subframe corresponding to the reception time of the DCI is the subframe 6 on the Nth frame, the value of "6" can be found by using Table 1. The reporting time of the CSI can be determined as follows: after the subframe 6 corresponding to the receiving time, the uplink of the subframe 6 is separated by 6-1=5 subframes (6 subframes starting from the subframe 6) For the frame, it can be seen that the reporting time should be the subframe 2 on the N+1th frame, as shown in FIG. 5 below.

In this example, the uplink/downlink configuration information of the serving cell that transmits the DCI is utilized.

3) For the time division duplex mode, the reporting time can also be determined as follows:

Receiving, according to the uplink/downlink configuration information of the serving cell that sends the channel state information CSI, the receiving time of the downlink control information and the predetermined third uplink scheduling timing relationship to determine the reporting time of the information state information, and the foregoing implementation The difference is that the uplink/downlink configuration information used is the uplink/downlink configuration information of the serving cell that sends the channel state information CSI, and the others are similar, and details are not described herein again.

Step 103: Determine a channel state information of the serving cell that needs to report the channel state information CSI. The time domain reference resource is: a subframe corresponding to the reporting time on the serving cell that needs to report the channel state information before the reporting time. The downlink subframe of a subframe may be generally expressed as a "subframe" _", and its meaning is as described above, and is not described herein again;

The value of the value is the interval [4, which satisfies the minimum value of the downlink subframe as the effective downlink subframe; and ^: is a positive integer greater than zero; w is an integer greater than or equal to zero;

In this embodiment, the value of ^: is as described above, and details are not described herein again.

Because the current CSI time domain reference resource is defined, for the aperiodic CSI triggered by the DCI, the time domain reference resource is "downlink subframe w - ", that is, several subframes from the reporting time of the CSI reporting, so that Only one downlink subframe can be selected fixedly. Therefore, when the downlink subframe is an invalid downlink subframe, the terminal device will not be able to transmit CSI.

As can be seen from the above embodiments, since the value can be multiple, the terminal device can have more machines. A valid downlink subframe is found; in addition, the "downstream subframe is determined as the channel state information time domain reference resource, and the current domain reference resource is defined as the "downstream subframe", the time domain reference resource may be one The downlink subframe with the shorter uplink subframe interval of the CSI is reported, so that the measured CSI value can accurately reflect the channel state information at the reporting time. Therefore, the determination of the CSI time domain reference resource is enhanced by the embodiment of the present invention.

In the present embodiment, when the channel state resource reference information is determined in step 103, the value needs to be determined, and then a minimum value satisfying the above condition is selected from [4. Therefore, the method may further include: determining the ^: value according to a preset working mode.

In this embodiment, when the working mode is frequency division duplexing (FDD), k=4; when the working mode is time division duplexing (TDD), according to the serving cell that sends the DCI or the serving cell that reports the CSI The uplink/downlink configuration information, the reception time at which the DCI is received, and the predetermined uplink scheduling timing relationship (as described in Table 1) are used to determine the value of the ^: value.

In this embodiment, the method may further include: transmitting CSI on the subframe w. The method of sending is similar to the prior art and will not be described here.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. The method may include all or part of the steps in the foregoing embodiment, and the storage medium may include: a ROM, a RAM, a magnetic disk, an optical disk, and the like.

The embodiment of the present invention further provides an apparatus and a terminal device for determining a channel state information reference resource, as described in the following embodiments. Since the device for determining the channel state information reference resource and the terminal device solve the problem similarly to the foregoing method based on the foregoing device and the terminal device, the implementation of the device and the terminal device can refer to the implementation of the method, and the repeated description is not repeated.

2 is a schematic diagram showing the structure of a device for determining channel state information reference resources according to Embodiment 2 of the present invention. The base station configures one or more serving cells for the terminal device. As shown in FIG. 2, the device 200 includes a first processing unit 201, where the first processing unit 201 is configured to send on a serving cell in the configured serving cell at the receiving network side. The triggering terminal device reports the downlink control information DCI of the channel state information CSI of the one or more serving cells in the configured serving cell, and determines the reporting time of the channel state information CSI, and determines the service that needs to report the channel state information. The time domain reference resource of the channel state information of the cell is: a subframe corresponding to the reporting time on the serving cell that needs to report the channel state information CSI before the reporting time a downlink subframe of the subframe;

In this embodiment, the value can be determined in accordance with a preset mode of operation. Thus, apparatus 200 also includes a second processing unit 202 for determining the value in accordance with a preset mode of operation.

The manner of specifically determining the value is as described in Embodiment 1. For example, for the mode of operation of the frequency division duplex, the second processing unit 202 determines = 4 _; for the mode of operation of the time division duplex, the second processing unit 202 transmits according to the second processing unit 202. The uplink/downlink configuration information of the serving cell of the downlink control information DCI receives the subframe number corresponding to the receiving time of the downlink control information DCI and the predetermined fourth uplink scheduling timing relationship to determine the k value; or is used for time-division double In the working mode, the uplink/downlink configuration information of the serving cell that sends the channel state information is received, and the subframe number corresponding to the receiving time of the downlink control information DCI and the predetermined fifth uplink scheduling timing relationship are received to determine the k value. .

The above fourth and fifth uplink scheduling timing relationships can be referred to Table 1, except that when the k value is determined, the uplink/downlink configuration information used is different.

It can be seen from the foregoing embodiment that the value may be multiple, so that there may be more opportunities to find a valid downlink subframe. In addition, the "downlink subframe w - " is determined as the channel state information time domain reference resource. Compared with the current method, the time domain reference resource is defined as the downlink subframe w-f, and the time domain reference resource may be a downlink subframe with a shorter interval of the uplink subframe reported by the CSI, so that the measured CSI is obtained. The value of the channel state information can be accurately reflected. Therefore, the determination of the CSI time domain reference resource is enhanced by the embodiment of the present invention.

3 is a schematic diagram showing the structure of a device for determining channel state information reference resources according to Embodiment 3 of the present invention. As shown in FIG. 3, the apparatus 300 includes a first processing unit 301 and a second processing unit 302, and its function is similar to that of the embodiment 2, and details are not described herein again.

In this embodiment, the apparatus 300 may further include a first receiving unit 303 and a third processing unit 304. The first receiving unit 303 is configured to receive a trigger sent by the network side on one of the configured serving cells. The terminal device reports the downlink control information DCI of the channel state information CSI of the one or more serving cells in the configured serving cell; the third processing unit 304 is configured to determine the reporting time of reporting the channel state information.

In this embodiment, the method for determining the reported time by the third processing unit 304 is similar to that of Embodiment 1, where No longer.

In addition, in this embodiment, the apparatus 300 may further include a sending unit (not shown) for transmitting the channel state information CSI. The transmission can be implemented by any existing technology, and will not be described here.

In this embodiment, the device can be a terminal device.

It can be seen from the foregoing embodiment that the foregoing apparatus of the embodiment of the present invention enhances the determination of the CSI time domain reference resource.

4 is a schematic structural diagram of a terminal device according to Embodiment 4 of the present invention. The terminal device 400 includes a processing unit 410, and the processing unit 410 is configured to determine channel state information reference resources. The structure of the processing unit 410 is as described in the foregoing embodiments 2 and 3, and details are not described herein again.

For example, terminal device 400 is a mobile telephone, and the figure is merely exemplary; mobile telephone 400 may also have other types of circuit components to supplement or replace the operational circuitry to implement communication functions or other functions. It is also apparent that the mobile phone 400 does not have to include all of the components shown in Figure 4, for example, the camera 406 may not be included.

Specifically, the mobile phone 400 includes a main control circuit 401, a transceiver 402, an input unit 403, an audio processing unit 404, a memory 405, a camera 406, a display 407, a power supply 408, and a processing unit 410. Main control circuit 401, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls the operation of various components of mobile telephone 400.

As with the conventional, input unit 403 provides a variety of user input operations. For example, input unit 403 typically includes alphanumeric keys for allowing alphanumeric information to be entered, such as phone numbers, phone lists, contact information, notes, and the like. In addition, the input unit 403 may include specific function keys such as a "Call Send" button for initiating or answering a call, a "Call End" button for ending or "suspend" a call, a channel recommendation button, and the like. Alternatively or in the alternative, the input unit 403 may be a touch screen. The function of a key or the like can also be implemented as a touch screen associated with display 407.

As usual, the camera 406 is used to capture image data. The image data captured by the camera 406 is supplied to the main control circuit 401 for use in a conventional manner, for example, for storage, transfer, and the like.

The display 407 can be, for example, an LCD display, but is not limited thereto. As usual, the display 407 displays information such as work status, time, phone number, contact information, various navigation menus, etc. to the user, enabling the user to use various functions of the mobile phone 400. Display 407 can also be used to visually display content received by mobile phone 400 and/or content retrieved from memory 405 of mobile phone 400. Mobile phone 400 includes an antenna 409 that is coupled to transceiver 402. Transceiver 402 includes a radio frequency transmitter and receiver for transmitting and receiving signals over antenna 409.

In addition, transceiver 402 is coupled to speaker 404-2 and microphone 404-1 via audio processing unit 404 to provide audio output via speaker 404-2 and to receive audio input from microphone 404-1. Audio processing unit 404 can include any suitable buffer, decoder, amplifier, and the like. In addition, the audio processing unit 404 is also coupled to the main control circuit 401 so that recording can be performed on the mobile telephone 1 via the microphone 404-1, and the audio signals stored in the memory 404 can be played back through the speaker 404-2. Memory 405 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. The memory 405 includes, for example, a buffer for buffering data, an application/function storage unit for storing an application and a function program or an operation flow to be executed by the main control circuit 401, and a data storage unit for storing the representation The device type of the mobile phone, here is the code of the mobile device, and further, the average values A and B of the correlation value and the correlation value calculated by the mobile phone 400; and a driver storage unit, the driver storage unit A driver for each component of the mobile phone 400, such as a driver for the cell search unit 410, can be stored.

Power source 408 is used to provide power to mobile phone 400.

In the present embodiment, the configuration of the processing unit 410 is similar to that of the embodiments 2 and 3, and will not be described herein. The various components of mobile telephone 400 may be implemented by special purpose hardware, firmware, software or a combination thereof without departing from the scope of the invention.

As can be seen from the above embodiments, the terminal device can enhance the determination of the CSI time domain reference resource.

The embodiment of the present invention further provides a network system, where the network system includes: a base station and a user equipment, where the base station is configured to send a service that triggers the terminal device to report and configure on a serving cell in the serving cell configured for the terminal device. Downlink control information of channel state information of one or more serving cells in the cell; the terminal device is configured to determine a channel state information time domain reference resource of the serving cell that needs to report channel state information, where the terminal device is as in the above embodiment The terminal device is not described here.

The beneficial effects of the method for determining channel state information reference resources in the embodiments of the present invention will be described below with reference to specific examples. The terminal device 400 of FIG. 4 and the scenario shown in FIG. 5 will be described as an example.

FIG. 5 is a first exemplary diagram of determining channel state information reference resources. As shown in FIG. 5, it is assumed that the base station configures two serving cells (Serving Cell) for the terminal device 400, and the TDD of the serving cell 1 (Serving Cell 1) is configured as "Configuration 1 (Configl)", that is, DSUUDDSUUD, serving cell 2 (Serving Cell 2) TDD Configured as "Configuration 4 (Config4)", S卩DSUUDDDDDD.

1) The base station transmits, in the subframe 6 of the Nth frame, the serving cell 1 (the serving cell 1 ), the DCI (Uplink DCI format) of the CSI that triggers the terminal device to transmit the configuration, that is, the CSI of the serving cell 1 and the serving cell 2 The triggering terminal device 400 reports the CSI on the serving cell 1 (serving cell 1) and the serving cell 2 (serving cell 2). In this embodiment, all the serving cells that trigger the configuration report the CSI, but the present invention is not limited thereto, and only the triggering may be triggered. A service area.

2) The terminal device 400 receives the DCI transmitted by the serving cell 1 in the subframe 6 of the Nth frame (the subframe corresponding to the reception time) and on the serving cell Kserving cell 1 ).

3) The terminal device 400 determines to report the reporting time of the CSI;

In this embodiment, the TDD working mode is used, and the DCI triggered aperiodic CSI is determined according to the uplink/downlink configuration information of the serving cell that sends the DCI, the receiving time of receiving the DCI, and the uplink scheduling relationship relationship of Table 1. Report the time. The specific method is as follows:

In this embodiment, the serving cell that sends the DCI that triggers the CSI is the serving cell 1, and the TDD uplink and downlink configuration is configured as 1. In addition, the terminal device 400 receives the DCI that triggers the aperiodic CSI in the subframe 6 of the Nth frame. Therefore, according to Table 1, the terminal device 400 can find that the value is "6", so that the reporting time is "6" subframes starting from the subframe 6 of the Nth frame, that is, the reporting time is the N+1th frame. Subframe 2, that is, the terminal device 400 reports the aperiodic CSI of the serving cell 1 and the serving cell 2 on the serving cell 1 in the subframe 2 of the N+1th frame.

In the above embodiment, the configuration information used is the uplink/downlink configuration information of the serving cell that sends the DCI, but is not limited thereto, and the uplink/downlink configuration information of the serving cell that sends the CSI may also be used, as shown in FIG. 6 below. Illustrated in the illustrated embodiment.

4) The terminal device 400 respectively determines the time domain reference resources of the CSI of the serving cell 1 and the serving cell 2 that need to be reported.

According to the current definition, if the subframe 6 of the Nth frame is a valid downlink subframe, the time domain reference resources of the reported CSI of the serving cell 1 and the serving cell 2 are the Nth frame of the serving cell 1 and the serving cell 2, respectively. Subframe 6. If the subframe 6 of the Nth frame of the serving cell 1 does not satisfy the condition of the valid downlink subframe, the terminal device will not report the CSI of the serving cell 1 in the subframe 2 of the N+1th frame; if the Nth of the serving cell 2 If the subframe 6 of the frame does not satisfy the condition of the valid downlink subframe, the terminal device will not report the CSI of the serving cell 2 in the subframe 2 of the (N+1)th frame.

It can be seen from the above that according to the current definition, the terminal device can only select the subframe 6 of the Nth frame as the time domain parameter. Test resources. However, it is found that for the serving cell 2, {subframe 8, subframe 7, subframe 6} of the Nth frame can be used as the time domain reference resource of the reported CSI. The downlink subframe whose inter-subframe time interval is the shortest to transmit the aperiodic CSI is the subframe 8 of the Nth frame. If subframe 8 is a valid downlink subframe, selecting it as a time domain reference resource can result in a more accurate CSI value. If the subframe 8 is not a valid downlink subframe, the terminal device has an opportunity to select the subframe 7 or the subframe 6 as the time domain reference resource. However, according to the existing definition, the terminal device can only select the subframe 6 as the time domain reference resource, and if the subframe 6 is not a valid downlink subframe, the terminal device will not report the CSI.

However, if the time domain reference resource is determined by the method of the foregoing embodiment of the present invention, the above problem existing in the existing definition can be solved, so that the determination of the time domain reference resource is enhanced. Description will be made below with reference to Fig. 5 .

The terminal device determines that the CSI time domain reference resource of the serving cell that reports the CSI in the subframe w is the "downlink subframe n - kl " on the serving cell; wherein, the value of Id is within the interval [4, k] meets the "downstream" Subframe "1" is the minimum value of the valid downlink subframe, and is a positive integer greater than zero; w is an integer greater than or equal to zero;

In this embodiment, the meaning of the downlink subframe is as described above, and is not described here;

In this embodiment, it can be determined as follows:

1) First, the value of ^: is determined. Since the embodiment is a TDD working mode, it can be determined by using the foregoing embodiment, and details are not described herein again.

When using the values determined in Table 1, the uplink/downlink configuration needs to refer to the TDD UL/DL configuration of the serving cell that transmits the uplink DCI that triggers the aperiodic CSI. In this embodiment, it is the TDD UL/DL configuration of the serving cell 1, and the subframe number is the subframe number corresponding to the reception time of the DCI, that is, the subframe 6 of the Nth frame. Thus, 4 = 6 can be determined based on the TDD UL/DL configuration (Configuration 1) and subframe number 6 of serving cell 1.

2) Second, determine the value:

In this embodiment, the value of the downlink subframe is the minimum value of the valid downlink subframe in [4, , [4, 6].

For example, when it is determined that the channel state information of the serving cell 2 needs to be reported in the time domain reference resource, when =4, the channel state information time domain reference resource is the "downlink subframe "-" on the serving cell 2, that is, from the Nth Start with subframe 2 of +1 frame, forward 4 subframes (or downlink subframes separated by 4-1=3 frames from the N+1th frame), that is, downlink subframe 8 of the Nth frame; and so on, when When the values are 5 and 6, the channel state information time domain reference resource is the downlink subframe 7 and the downlink subframe 6 of the Nth frame on the serving cell 2.

Thus, if the downlink subframe 8 of the Nth frame, the downlink subframe 7 and the downlink subframe 6 are valid downlink sub-frames The frame is then 4, so that the time domain reference resource selects a downlink subframe with the shortest uplink time interval from the CSI.

If the downlink subframe 8 of the Nth frame is not a valid downlink subframe, and the downlink subframe 7 of the Nth frame is a valid downlink subframe, then 5, so that the time domain reference resource selects a distance to report the uplink of the CSI. A downlink subframe with a shorter subframe interval.

If the downlink subframe 8 and the downlink subframe 7 of the Nth frame are not valid downlink subframes, and the downlink subframe 6 of the Nth frame is a valid downlink subframe, then;

For example, when it is determined that the channel state information of the serving cell 1 needs to be reported, the uplink subframe 7 and the uplink subframe 8 of the Nth frame on the serving cell 1 are both uplink subframes. Non-effective downlink subframe, and =6 is a valid downlink subframe, therefore, kl = 6.

In this embodiment, when determining the value, the UL/DL configuration information of the serving cell that sends the uplink DCI that triggers the aperiodic CSI is determined, but is not limited thereto, and the uplink/downlink of the serving cell that sends the CSI may also be used. The configuration information is determined to be as shown in the embodiment shown in FIG. 6.

3) After determining, the CSI time domain reference resource on the serving cell 2 that needs to report the CSI is the "downlink subframe" of the serving cell 2, that is, starting from the subframe 2 of the N+1 frame, the number of forward 4 subframes; determining that the CSI time domain reference resource on the serving cell 1 transmitting the CSI is the "downlink subframe "-" on the serving cell, that is, starting from the subframe 2 of the N+1 frame, the forward number is 6 Subframes.

If the downlink subframe 8 and the downlink subframe 7 and the downlink subframe 6 of the Nth frame are not valid downlink subframes on the serving cell 2, the terminal device does not report the service in the subframe 2 of the (N+1)th frame. CSI of cell 2. Similarly, if the downlink subframe 6 of the Nth frame in the serving cell 1 is an invalid downlink subframe, the terminal device does not report the CSI of the serving cell 1 in the subframe 2 of the N+1th frame.

As can be seen from the foregoing embodiment, the terminal device may have more opportunities to find a valid downlink subframe; and the downlink subframe w - is determined as the channel state information time domain. Therefore, the time domain reference resource may select a downlink subframe that is shorter than the uplink subframe interval of the CSI, so that the measured CSI value can accurately reflect the channel state information at the reporting time. Therefore, the determination of the CSI time domain reference resource is enhanced by the embodiment of the present invention.

FIG. 6 is a second exemplary diagram of determining channel state information reference resources. As shown in FIG. 6, it is assumed that the terminal device 400 is configured with two serving cells (Serving Cell), and the TDD configuration of the serving cell 1 (Serving Cell 1) is "Configuration 1 (Configl)", S卩DSUUDDSUUD, serving cell 2 ( Serving Cell 2) TDD Configured as "Configuration 4 ( Config4 )", S卩DSUUDDDDDD.

1) The base station sends a touch on the serving cell 2 in the subframe 6 of the Nth frame

Sending the terminal device to send the configured serving cell, that is, the DCK Uplink DCI format of the CSI of the serving cell 1 and the serving cell 2, triggering the terminal device 400 to report the service cell 1 (serving cell 1) and the serving cell 2 (serving cell 2) In this embodiment, the CSI is reported by all serving cells that trigger the configuration, but is not limited thereto, and only one of the serving cells may be triggered.

2) 400 in sub-frame N terminal device 6 frame (sub-frame corresponding to the reception time) in the serving cell 2 _(Se rving cell 1) cell 2 receives a service transmitted by the DCI.

3) The terminal device 400 determines to report the reporting time of the CSI;

In this embodiment, the TDD operation mode is determined, and the DCI trigger is determined according to the uplink/downlink configuration information of the uplink/downlink configuration information of the serving cell that sends the CSI, the receiving time of receiving the DCI, and the uplink scheduling relationship relationship of Table 1. The reporting time of the aperiodic CSI. The specific method is as follows:

In this embodiment, the serving cell that sends the CSI is the serving cell 1, and the TDD uplink and downlink configuration is configured as 1. In addition, the terminal device 400 receives the DCI that triggers the aperiodic CSI in the subframe 6 of the Nth frame, so according to the table. 1. The terminal device 400 can find that the value is "6", so that the reporting time is the "6" subframes starting from the subframe 6 of the Nth frame, that is, the reporting time is the subframe of the (N+1)th frame. 2. That is, the terminal device 400 reports the aperiodic CSI of the serving cell 1 and the serving cell 2 on the serving cell 1 in the subframe 2 of the (N+1)th frame.

Similar to the embodiment shown in FIG. 5, according to the existing definition, the terminal device can only select subframe 6 as a time domain reference resource, and if subframe 6 is not a valid downlink subframe, the terminal device will not report CSI.

However, if the time domain reference resource is determined by using the method in the foregoing embodiment of the present invention, there may be more opportunities to find a valid downlink subframe, so that the measured CSI value can accurately reflect the CSI at the reporting time, and the existing The above problems in the definition make the determination of the time domain reference resources enhanced. This will be described below with reference to Fig. 6.

The terminal device determines that the CSI time domain reference resource of the serving cell reporting the CSI in the subframe w is the "downlink subframe n - kl" on the serving cell; wherein, the value of Id is satisfied within the interval [4, k] The downlink subframe n _ k1 "is the minimum value of the valid downlink subframe, and the sum is a positive integer greater than zero; w is an integer greater than or equal to zero;

In this embodiment, "the meaning of the downlink subframe is as described above, and details are not described herein again; In this embodiment, it can be determined as follows:

When using the values determined in Table 1, the uplink/downlink configuration needs to refer to the serving cell that sends the CSI, that is, the TDD UL/DL configuration of the serving cell 1. In this embodiment, it is the TDD UL/DL configuration of the serving cell 1, and the subframe number is the subframe number corresponding to the reception time of the DCI, that is, the subframe 6 of the Nth frame. Thus, =6 can be determined based on the TDD UL/DL configuration (Configuration 1) and subframe number 6 of the serving cell 1.

2) Second, determine the value:

For example, when determining the time domain reference resource of the channel state information of the serving cell 2, when the value is 4, the channel state information time domain reference resource is the "downlink subframe w - " on the serving cell 2, that is, from the N+ Start with subframe 2 of 1 frame, forward 4 subframes (or downlink subframes separated by 4-1=3 frames from the N+1 frame), that is, downlink subframe 8 of the Nth frame; and so on, when = At 5 and 6, the channel state information time domain reference resource is the downlink subframe 7 and the downlink subframe 6 of the Nth frame on the serving cell 2.

In this way, if the downlink subframe 8 and the downlink subframe 7 and the downlink subframe 6 of the Nth frame are both valid downlink subframes, then 4, so that the time domain reference resource selects a distance to report the uplink subframe time of the CSI. The shortest downlink subframe.

For example, when it is determined that the channel state information of the serving cell 1 is referred to the time domain reference resource, at the time of =4 and 5, the uplink subframe 7 and the uplink subframe 8 of the Nth frame on the serving cell 1 are uplink subframes, Valid downlink subframes; and =6 is a valid downlink subframe, therefore, =6.

3) After determining, the CSI time domain reference resource on the serving cell 2 that needs to report the CSI is the "downlink subframe" of the serving cell 2, that is, starting from the subframe 2 of the N+1 frame, the number of forward 4 subframes; determining that the CSI time domain reference resource on the serving cell 1 reporting the CSI is the "downlink" of the serving cell The frame "-", that is, starting from subframe 2 of the N+1 frame, is forwarded by 6 subframes.

If the downlink subframe 8 and the downlink subframe 7 and the downlink subframe 6 of the Nth frame are not valid downlink subframes, the terminal device does not report the serving cell in the subframe 2 of the N+1th frame. 2 CSI. Similarly, if the downlink subframe 6 of the Nth frame in the serving cell 1 is an invalid downlink subframe, the terminal device does not report the CSI of the serving cell 1 in the subframe 2 of the N+1th frame.

In the embodiment shown in Figs. 5 and 6, N is an integer greater than or equal to zero.

As can be seen from the foregoing embodiment, the terminal device may have more opportunities to find a valid downlink subframe. In addition, the downlink subframe w - is determined as the channel state information time domain. The reference resource may be configured to select a downlink subframe that is shorter than the uplink subframe interval of the CSI, so that the measured CSI value can accurately reflect the channel state information at the reporting time. Therefore, the determination of the CSI time domain reference resource is enhanced by the embodiment of the present invention.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a device that determines channel state information reference resources, the program causes the computer to execute in the device that determines the channel state information reference resource as in Embodiment 1 The method for determining channel state information reference resources.

An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform determining channel state information reference resources as described in Embodiment 1 in an apparatus for determining channel state information reference resources Methods.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the blind detection method described in Embodiment 3 in a receiver. The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are not intended to limit the scope of the invention. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

¾1¾^^

1. A method for determining channel state information reference resources, the method includes:

The receiving network side sends downlink control information on one of the configured serving cells that triggers the terminal device to report the channel state information of one or more of the configured serving cells, and determines to report the channel At the reporting time of the status information, it is determined that the channel state information time domain reference resource of the serving cell that needs to report the channel status information is: before the reporting time, on the serving cell that needs to report the channel status information corresponding to the reporting time. The subframe w is the downlink subframe of the interval subframe;

Among them, the value of is the minimum value within the interval [4, which satisfies the downlink subframe as a valid downlink subframe; W and are positive integers greater than zero; « is an integer greater than or equal to zero.

2. The method according to claim 1, wherein the method further includes:

Receive downlink control information sent by the network side on one of the configured serving cells that triggers the terminal device to report channel state information of one or more of the configured serving cells;

Determine the reporting time of the channel status information.

3. The method according to claim 1 or 2, wherein the determining the reporting time of channel state information includes:

For the frequency division duplex working mode, the reporting time of the channel status information is determined based on the reception time of the downlink control information and the predetermined first uplink scheduling timing relationship;

For the time division duplex working mode, the information status information is determined according to the uplink/downlink configuration information of the serving cell that sends the downlink control information, the reception time of receiving the downlink control information, and the predetermined second uplink scheduling timing relationship. Reporting time.

4. The method according to claim 1 or 2, wherein, for the time division duplex working mode, the determining the reporting time of the channel status information includes:

The reporting time of the information status information is determined based on the uplink/downlink configuration information of the serving cell that sends the channel status information, the reception time of the downlink control information, and the predetermined third uplink scheduling timing relationship.

5. The method according to claim 1 or 2, wherein the method further includes: determining the value according to a preset working mode.

6. The method according to claim 5, wherein,

For frequency division duplex operation, k = 4;

For the time division duplex working mode, it is determined according to the uplink/downlink configuration information of the serving cell that sends the downlink control information, the subframe number corresponding to the reception time of receiving the downlink control information, and the predetermined fourth uplink scheduling timing relationship. The k value.

7. The method according to claim 5, wherein,

For the time division duplex working mode, it is determined according to the uplink/downlink configuration information of the serving cell that sends the channel state information, the subframe number corresponding to the reception time of receiving the downlink control information, and the predetermined fifth uplink scheduling timing relationship. The k value.

8. A device for determining channel state information reference resources, the device includes:

A first processing unit configured to trigger the terminal device to report a channel of one or more serving cells in the configured serving cells, which is sent on the receiving network side on one of the configured serving cells. When determining the downlink control information of the status information and determining the reporting time to report the channel status information, it is determined that the channel status information time domain reference resource of the serving cell that needs to report the channel status information is: before the reporting time, before the channel status information needs to be reported The subframe W corresponding to the reporting time on the serving cell of the status information is spaced from the downlink subframe of the subframe;

Among them, the value of is the minimum value within the interval [4, which satisfies that the downlink subframe is a valid downlink subframe; and is a positive integer greater than zero; w is an integer greater than or equal to zero.

9. The device according to claim 8, wherein the device further includes:

The first receiving unit is configured to receive a message sent by the network side on one of the configured serving cells to trigger the terminal device to report one or more of the configured serving cells. Downlink control information of channel status information;

The third processing unit is configured to determine the reporting time of the channel state information.

10. The device according to claim 9, wherein the third processing unit is configured to calculate the downlink control information according to the reception time of the downlink control information and the predetermined first uplink scheduling timing relationship in the frequency division duplex working mode. Determine the reporting time of the channel state information; In the time division duplex working mode, receive the reception time of the downlink control information and the scheduled second uplink according to the uplink/downlink configuration information of the serving cell that sends the downlink control information. The timing relationship is scheduled to determine the reporting time of the information status information.

11. The device according to claim 9, wherein the third processing unit is configured to work in time division duplex In the mode, the reporting time of the information status information is determined based on the uplink/downlink configuration information of the serving cell that sends the channel status information, the reception time of the downlink control information, and the predetermined third uplink scheduling timing relationship.

12. The device according to claim 8 or 9, wherein the device further includes a second processing unit, the second processing unit is used to determine the value according to a preset working mode.

13. The device according to claim 12, wherein the second processing unit is configured to determine = 4 when operating in frequency division duplex mode _; and to determine = 4 when operating in time division duplex mode, according to sending the downlink control The k value is determined based on the uplink/downlink configuration information of the serving cell of the information, the subframe number corresponding to the reception time of receiving the downlink control information, and the predetermined fourth uplink scheduling timing relationship.

14. The device according to claim 12, wherein the second processing unit is configured to receive the downlink according to the uplink/downlink configuration information of the serving cell that sends the channel state information when the time division duplex working mode is used. The k value is determined based on the subframe number corresponding to the reception time of the control information and the predetermined fifth uplink scheduling timing relationship.

15. A terminal device, including a processing unit, the processing unit including the device according to any one of claims 8-14.

16. A network system, the network system includes:

A base station, which is configured to send, on one of the serving cells configured for the terminal device, downlink control information that triggers the terminal device to report channel state information of one or more of the configured serving cells;

Terminal equipment, the terminal equipment is used to determine the channel state information time domain reference resource of the serving cell for which channel state information needs to be reported, and the terminal equipment is the terminal equipment described in 15.

17. A computer-readable program, wherein when the program is executed in a device for determining a channel state information reference resource, the program causes the computer to execute the method of claim 1- in the device for determining a channel state information reference resource. The method for determining channel state information reference resources according to any one of claims 7.

18. A storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to perform the determination as claimed in any one of claims 1-7 in an apparatus for determining channel state information reference resources Channel state information reference resource method.