TW201935868A - Channel status information reporting method and detecting method and a communication device and a base station therefor - Google Patents

Abstract

A channel status information (CSI) reporting method is provided. The method is used in a communication device of a wireless communication system. The method includes the following steps. At least one first reference signal corresponding to a first serving cell is received. Channel measurement on each of the at least one first reference signal is performed. A candidate reference signal is obtained according to a result of the channel measurement of the at least one first reference signals. A channel status information corresponding to the candidate reference signal is reported.

Description

Reporting method and detecting method of channel state information, and communication device and base station thereof

The invention relates to a method for reporting and detecting channel state information, and a communication device and a base station thereof.

Carrier Aggregation (CA) technology can be used to increase the data transmission rate, and it can provide sufficient frequency resources for the transmission of burst data. Therefore, carrier aggregation technology continues to flourish in the field of New Radio (NR).

However, to provide services on multiple serving cells (such as operating at frequencies higher than 6 GHz), how to use the Beam Management Framework, especially for different transmission wave beams on different serving cells User equipment (UE) may not be able to receive these different transmission beams at the same time, and may not use carrier aggregation technology to improve data transmission efficiency. Therefore, how to solve the above problems in order to improve the data transmission rate in a system using carrier aggregation technology is one of the efforts of the industry.

According to a first embodiment of the present invention, a method for reporting channel state information is provided, which is used in a communication device of a wireless communication system. This method includes the following steps. Receiving at least a first reference signal corresponding to a first service cell. A channel measurement is performed on each of the at least one first reference signal. According to the channel measurement result of the at least one first reference signal, a candidate reference signal is obtained. Reports channel status information corresponding to this candidate reference signal.

According to another embodiment of the present invention, a method for detecting channel state information is provided, which is used in a base station of a wireless communication system. The method includes the following steps. Send out at least a first reference signal corresponding to a first service cell. After a communication device of one of the wireless communication systems performs channel measurement on each of the at least one first reference signal, and obtains a candidate reference signal according to a result of the channel measurement of the at least one first reference signal, it receives this Candidate reference signal. Receive channel status information corresponding to this candidate reference signal.

According to another embodiment of the present invention, a communication device for reporting channel state information is provided. The communication device includes a transceiver unit and a processor. The transceiver unit is configured to receive at least one first reference signal corresponding to a first service cell. The processor is electrically connected to the transceiver unit for performing channel measurement on each of the at least one first reference signal, and obtaining a candidate reference based on a result of the channel measurement of the at least one first reference signal. Signal. The processor is further configured to report channel status information corresponding to the candidate reference signal through the transceiver unit.

According to another embodiment of the present invention, a base station for detecting channel state information is proposed. The base station includes a transceiver unit and a processor. The transceiver unit is configured to send at least a first reference signal corresponding to a first service cell. The processor is electrically connected to the transceiver unit, and is configured to perform channel measurement on each of the at least one first reference signal in a communication device of a wireless communication system through the transceiver unit, and according to the at least one first After obtaining a candidate reference signal as a result of channel measurement of a reference signal, the candidate reference signal is received. The processor is further configured to receive channel status information corresponding to the candidate reference signal through the transceiver unit.

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:

The embodiments of the present disclosure allow a base station (such as a 5G base station (next generation node B, gNodeB)) to know whether a user equipment (User Equipment, UE) can perform downlink transmission through multiple serving cells (serving cells) at the same time Downlink (DL). The plurality of service cells are, for example, a plurality of service cells operating at a frequency of 6 GHz or higher. The user equipment receives information through a physical downlink share channel (physical downlink share channel, PDSCH), for example.

Please refer to FIG. 1A and FIG. 1B. FIG. 1A shows a system schematic diagram for wireless communication by using a Primary Component Carrier (PCC), and FIG. 1B shows a system using a secondary component carrier (PCC). Secondary Component Carrier (SCC) system for wireless communication. As shown in FIG. 1A, it is assumed that the user equipment 102 has two sets of antenna systems, and may have two sets of analog beamforming (ABF) ABF0 and ABF1. Analog beamforming, for example, has four received beams in different directions. For example, analog beamforming ABF0 has receiving beams A, B, C, and D, while analog beamforming ABF1 has receiving beams N, O, P, and Q.

Assume that after the first Beam management (BM) procedure, the user equipment 102 decides to use the analog beamforming ABF0 receiving beam C to receive the reference signal 104 of the main component carrier to the base station 106. The main component carrier is to perform the receiving operation of the downlink transmission. The different reference signals are, for example, transmission beams pointing in different directions. As shown in FIG. 1B, after the first beam management procedure, the user equipment 102 may decide to use the receiving beam C of the analog beamforming ABF0 and the receiving beam N, O, P, Q of the analog beamforming ABF1. First, the reference signal of the secondary component carrier is received to perform a receiving operation of downlink transmission on the secondary component carrier of the base station 106. In this way, when the downlink transmission receiving operation is officially performed, the user equipment 102 can simultaneously receive the data transmitted on the primary component carrier and the secondary component carrier, that is, for example, using the receive beam C of the analog beamforming ABF0 to receive the primary The data transmitted on the component carrier and the secondary component carrier, or the receive beam C of the analog beamforming ABF0 is used to receive the main component carrier and one of the receive beams N, O, P, and Q of the analog beamforming ABF1 is used to receive The data transmitted on the secondary carrier. In this way, the data transmission rate can be effectively improved.

The above-mentioned beam management procedure is briefly described below. Please refer to FIG. 2, which is a schematic diagram of a beam management procedure. It is assumed that the base station 206 cannot know the relevant information of the receiving beam used by the user equipment 202, that is, the base station 206 cannot know which receiving beam the user equipment 202 uses to receive the reference signal sent by the base station 206. In this situation, the base station and the user equipment independently perform beam management procedures on each serving cell.

The general beam management procedure mainly includes the following three steps. First, the base station 206 is a beam management program and provides a reference signal configuration. That is, for each serving cell, the user equipment 202 may be configured with at least one reference signal configuration for management or measurement of beam or channel state information. For example, as shown in FIG. 2, the base station 206 provides a reference signal configuration 203 composed of reference signals 204 (0) to 204 (7).

Second, Beam Measurement is performed. That is, for each serving cell, according to the above-mentioned reference signal configuration, the user equipment 202 may perform management or measurement of beams or channel status information (CSI). For example, the user equipment 202 may perform the management or measurement of the beam or channel state information on the reference signals 204 (0) to 204 (7) in the reference signal configuration 203 by using the corresponding receiving beams, respectively, to learn Signal strength or signal quality of the received reference signals 204 (0) to 204 (7).

Third, reporting of beams (reporting), including the indication of which beam and the corresponding measurement quality report. That is, for each serving cell, the user equipment 202 may report the results of management or measurement according to the reference signal configuration. For example, the user equipment 202 may select a reference signal with the best signal strength or signal quality among the signals 204 (0) to 204 (7) to report and report the corresponding signal quality.

The above analog beamforming is briefly described below. Please refer to FIG. 3A and FIG. 3B, where FIG. 3A illustrates a schematic diagram of a user equipment having a group of analog beamforming, and FIG. 3B illustrates a schematic diagram of a user equipment having a group of analog beamforming. Analog beamforming ABF0 has a second set of receiving beams, that is, receiving beams A, B, C, D, and analog beamforming ABF1 has a first set of receiving beams, that is, receiving beams N, O, P, and Q. For the analog beamforming ABF0, the user equipment 302 may have to receive the data transmitted through the receiving beams A, B, C, and D in a Time Division Multiplexing (TDM) manner. For the analog beamforming ABF1, the user equipment 302 may also need to receive data transmitted through the receiving beams N, O, P, and Q in a time-division multiplexing manner. Each group of receiving beams is on the user equipment 302 side and receives signals through at most one receiving beam. The user equipment 302 can perform the receiving operation of the downlink transmission in different groups (for example, the first group and the second group) at the same time. Among them, different user equipments may have different antenna field types, capabilities, configurations, or any combination thereof. The base station may not know the number of received beams of the user equipment and the relationship between the received beams.

However, the user equipment may still be unable to perform receiving operations for downlink transmission from multiple serving cells simultaneously. Please refer to FIGS. 4A to 4D, which are schematic diagrams illustrating an example of a user equipment that cannot perform a receiving operation of downlink transmission from multiple serving cells simultaneously. As shown in FIG. 4A, it is assumed that the user equipment 402 selects the reference signal 404 (1) and reports it to the base station 406 for the serving cell CC0 after the beam management procedure. The user equipment 402 receives the reference signal 404 (1) through the receiving beam A.

As shown in FIG. 4B, it is assumed that the user equipment 402 selects the reference signal 404 (1) and reports it to the base station 406 for the serving cell CC1 after the beam management procedure. The user equipment 402 receives the reference signal 404 (1) through the receiving beam B.

Then, when transmitting data formally, as shown in FIG. 4C, the base station 406 can transmit data on the serving cell CC0 using the reference signal 404 (1), and the user equipment 402 receives the reference through the receiving beam A Data transmitted on signal 404 (1). Moreover, in the formal transmission of data, as shown in FIG. 4D, the base station 406 can also use the reference signal 404 (1) for data transmission on the serving cell CC1, and the user equipment 402 receives the reference through the receiving beam B Data transmitted on signal 404 (1). However, since the user equipment 402 is used to receive the data of the reference signals 404 (1) on the serving cells CC0 and CC1, it uses different receiving beams A and B respectively. The problem of receiving data transmitted by the service cells CC0 and CC1 at the same time.

Please refer to FIG. 5, which is a schematic diagram showing the data transmitted on the receiving service cells CC0 and CC1 corresponding to FIGS. 4A to 4D. It is assumed that between time points t1 to t3 (as shown in area 502), the base station 406 transmits data using the serving cell CC0 corresponding to the frequency band BW0, and the user equipment 402 uses the receiving beam corresponding to the reference signal 404 (1) A to receive information. Assuming that between time points t2 and t4 (as shown in area 504), the base station 406 transmits data using the serving cell CC1 corresponding to the frequency band BW1, and the user equipment 402 uses the receiving beam corresponding to the reference signal 404 (1) B to receive information. However, between time points t2 and t3 (as shown in area 506), since the user equipment 402 can only use the receiving beam A or B to receive data, the user equipment 402 may only receive the base station 406 to serve the cells The data transmitted by CC0, or the data transmitted by the serving cell CC1, cannot receive the data transmitted by the serving cells CC0 and CC1 at the same time. Another possibility is that the user equipment uses the receiving beam A or B to simultaneously receive the data of the serving cell CC0 and the serving cell CC1. However, in such a situation, there may be a situation in which the data reception quality of one of the service cells (CC0 or CC1) is poor. In this way, the effect of using the carrier aggregation technology of the serving cells CC0 and CC1 to improve the data transmission rate cannot be achieved, and sufficient frequency resources cannot be provided for the transmission of burst data.

In order to solve the above problems, an embodiment of the present disclosure provides a method for reporting channel state information of a wireless communication system. Please refer to FIG. 6, which shows a flowchart of a method for reporting channel state information according to the embodiment of the disclosure. Please also refer to Figs. 7A ~ 7B, which are schematic diagrams of the wireless communication system corresponding to the flowchart of Fig. 6. This method is used in the communication device 702 of the wireless communication system 700.

The method for reporting channel status information in this embodiment includes the following steps. In step 602, at least one first reference signal corresponding to a first service cell is received, as shown in FIG. 7A. Next, in step 604, a channel measurement is performed on each of the at least one first reference signal.

Then, in step 606, a candidate reference signal is obtained according to the channel measurement result of the at least one first reference signal. Then it proceeds to step 608 to report channel state information corresponding to this candidate reference signal. The related parts are further described later.

The above method for reporting channel state information further includes a step of receiving at least one serving cell identification code and / or a reference signal (reference signal) configuration for reference. The at least one first reference signal is related to the at least one serving cell identification code and / or the reference signal configuration for the reference.

Wherein, the at least one serving cell identification code and / or the reference signal configuration for the reference corresponds to a second serving cell. The communication device 702 has at least one spatial domain receive filter. In step 604 of performing channel measurement on each of the at least one first reference signal, at least one spatial domain receiving filter capable of receiving at least a portion of the signal simultaneously with the second serving cell is selected, or an optional filter The reference signal used for this reference configures at least a part of the at least one spatial domain receive filter that is simultaneously received to perform channel measurement.

The above reference signal configuration for reference is related to the candidate reference signal Quasi co-location (QCL), for example. For example, the above-mentioned reference signal configuration and candidate reference signal quasi-coordinate means that when the user equipment uses a specific receiving beam to receive the reference signal configuration, the user equipment also uses the specific receiving beam to receive the candidate. Reference signal. For the definition of quasi-parity, please refer to the definition of the 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution, Long Term Evolution) specification or the 3GPP NR specification.

As shown in FIG. 7B, the first spatial domain receiving filter of the communication device 702 of the wireless communication system 700 is used to receive a second reference signal (for example, the reference signal 703) of the second serving cell. The base station 706 of the wireless communication system 700 is configured to communicate with the communication device 702 using the first spatial domain receiving filter by using the second reference signal (for example, the reference signal 703) of the second serving cell. The candidate reference signal is related to the first spatial domain receive filter described above. The second reference signal and the candidate reference signal are, for example, quasi-parity-correlated. For example, when the user equipment uses a specific receiving beam to receive the second reference signal, the user equipment also uses the specific receiving beam to receive the candidate reference signal.

The receiving filter in the space domain is achieved by, for example, the antenna plate for generating an analog beam field type with multiple beams. The beams herein can be achieved by an antenna, an antenna port, an antenna element, a group of antennas, a group of antenna ports, a group of antenna elements, or a spatial domain filter. An antenna plate has, for example, at least one antenna, at least one antenna port, or at least one antenna element. The above can be achieved by processing at least one antenna signal received by at least one antenna, at least one antenna port, or at least one antenna element of the antenna panel (for example, by multiplying by different phase rotation values). At least one spatial domain filter to realize the above-mentioned function of receiving beams receiving signals in different directions.

In the above method, the base station 706 can simultaneously use the candidate reference signal and the second reference signal to communicate with the first service cell and the second service cell and the communication device 702, respectively. The first service cell is, for example, a secondary service cell and the second service cell is, for example, a primary service cell. Alternatively, the second service cell is a service cell predetermined by the base station 706 and the first service cell line is a service cell different from the second service cell. In one embodiment, different serving cell lines correspond to different signal transmission frequency bands or different component carriers. In another embodiment, different serving cells may also use the same or different signal transmission frequency bands, but use time-division multiplexing to transmit data in different time sections. In yet another embodiment, different serving cell lines use different encoding methods to transmit data.

The communication device 702 is, for example, a user equipment. The at least one first reference signal is, for example, reference signals 704 (0) to 704 (7). In the first serving cell (for example, a sub-serving cell), for example, communication is performed by using a sub-carrier wave. In the second serving cell (for example, the main serving cell), for example, communication is performed through the main component carrier, or communication is performed by the component carrier designated by the base station (for example, using an upper layer signal). The at least one serving cell identification code is, for example, a serving cell identification code of a second serving cell (for example, a main serving cell), or a serving cell identification code of a serving cell configured or designated by a base station. The above-mentioned reference signal configuration for reference is, for example, the reference signal configuration corresponding to all the reference signals of the second service cell.

The above-mentioned candidate reference signal is related to the first spatial domain receiving filter. When the communication device 702 uses the first spatial domain receiving filter at the second serving cell to receive the second reference signal from the base station 706, the communication device 702 The candidate reference signal from the base station 706 may also be received using a first spatial domain receive filter. Alternatively, when the communication device 702 receives the second reference signal from the base station 706 at the second serving cell using the first spatial domain receiving filter, the communication device 702 may also use other devices different from the first spatial domain receiving filter. The spatial domain receiving filter receives candidate reference signals from the base station 706. The base station 706 can use the candidate reference signal and the second reference signal at the same time to communicate with the first service cell and the second service cell and the communication device 702, respectively.

For example, it is assumed that the first spatial domain receiving filter corresponds to the receiving beam C. When the base station 706 uses the second serving cell to communicate with the communication device 702, the base station 706 uses the reference signal 703 to communicate with the receiving beam C of the communication device 702. The receiving beam used to receive the candidate reference signal may be one of the receiving beam C, which belongs to the analog beamforming ABF0, or one of the receiving beams N, O, P, and Q belonging to the analog beamforming ABF1. In this way, the communication device 702 may simultaneously receive the reference signal 703 and the candidate reference signal (which may be one of the reference signals 704 (0) to 704 (7)) from the base station 706 by using the receiving beam C; or, the communication device 702 may use The receiving beam C receives the reference signal 703 from the base station 706, and simultaneously receives the candidate reference signal from the base station 706 in one of the receiving beams N, O, P, and Q (may be reference signals 704 (0) ~ 704 (7 ) One of them), and achieve the purpose of using the second serving cell (for example, corresponding to the primary component carrier) and the first serving cell (for example, corresponding to the secondary component carrier) for downlink transmission between the base station 706 and the communication device 702 .

One of the implementation examples for achieving the above-mentioned objective can be achieved by the limitation during measurement. For example, if the communication device has a first antenna panel 708 and a second antenna panel 710. The first antenna plate 708 is used to generate a first spatial domain receiving filter (for example, corresponding to the receiving beam C) and at least one second spatial domain receiving filter (for example, corresponding to the receiving beam A, B, D). The second antenna plate 710 is used to generate at least one third spatial domain receiving filter (for example, corresponding to the receiving beams N, O, P, and Q). According to the channel measurement result of the at least one first reference signal, in step 606 of obtaining a candidate reference signal, it is not selected to receive by using at least one second spatial domain receive filter (for example, corresponding to the receive beams A, B, and D). The reference signal is used as a candidate reference signal. For example, it is selected to use the first spatial domain receiving filter (for example, corresponding to the receiving beam C) of the first antenna plate 708 or the third spatial domain receiving filter (for example, the antenna plate 710) of another antenna plate (for example, the antenna plate 710). Is corresponding to the reference signal received by the receiving beams N, O, P, Q) as a candidate reference signal. That is, in step 604 of performing channel measurement on each of these first reference signals (reference signals 704 (0) to 704 (7)), only the first space of the first antenna plate 708 is used Domain receiving filter (for example, corresponding to the receiving beam C), or a third spatial domain receiving filter (for example, corresponding to the receiving beam N, O, P, Q) of another antenna plate (for example, the antenna plate 710) Measurement. The candidate reference signal is selected by using the reference signal received by the first spatial domain receiving filter (for example, corresponding to the receiving beam C) and the third spatial domain receiving filter (for example, corresponding to the receiving beam N, O, P, Q).

Another implementation example to achieve the above purpose can be achieved by restricting the time of return. For example, in step 608 of reporting channel state information corresponding to the candidate reference signal, the channel of the reference signal received using at least one second spatial domain receive filter (for example, corresponding to the receive beams A, B, and D) is not reported. Status information. For example, channel state information of reference signals received using these second spatial domain receive filters (for example, corresponding to receive beams A, B, and D) is not reported. That is, in step 608 of reporting channel state information corresponding to the candidate reference signal, the channel state information of the reference signal received using the first spatial domain receiving filter (eg, corresponding to the receiving beam C) is reported. Alternatively, only the first spatial domain receiving filter (for example, corresponding to the receiving beam C) using the first antenna plate 708, or the third spatial domain receiving filter (for example, the antenna plate 710) of other antenna plates (for example, the antenna plate 710) is reported. Channel state information corresponding to the reference signal received by the receiving beams N, O, P, Q).

An example is given for further details. Please refer to FIGS. 8A to 8C, which are schematic diagrams illustrating an example of a method for reporting channel state information using the embodiment disclosed in FIG. 6. To simplify the description, it is assumed that the communication device 802 has analog beam field types ABF0 and ABF1, the analog beam field type ABF0 has receiving beams A and B, and the analog beam field type ABF1 has receiving beams C and D.

As shown in FIG. 8A, when the beam management procedure is performed for the second component carrier (for example, the main component carrier), it is assumed that the base station 806 issues 4 reference signals, and is designated by the codes CSI-RS # P1, CSI-RS # P2, CSI-RS # P3 and CSI-RS # P4 represent the four reference signals from top to bottom. The CSI-RS stands for channel status information reference signal. Assume that when the base station 806 uses the second component carrier (such as the main component carrier) to communicate with the communication device 802, it chooses to use the reference signal CSI-RS # P2 to communicate with the receiving beam C of the communication device 802.

As shown in FIG. 8B, when the beam management procedure is performed for the first component carrier (for example, the secondary component carrier), the communication device 802 receives at least one of the reference signal configurations 805 corresponding to the first component carrier (for example, the secondary component carrier). Reference signals CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, CSI-RS # S4 (codes CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, CSI-RS # S4 Represents the four reference signals from top to bottom). Then, channel measurement is performed on each of the reference signals CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, and CSI-RS # S4.

As shown in Fig. 8C, when performing channel measurement, the method of limiting during measurement is adopted. That is, when performing channel measurement on each of the reference signals CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, and CSI-RS # S4, the channel measurement is not performed using the receiving beam D . That is, when performing channel measurement on each of the reference signals CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, and CSI-RS # S4, only the reception of the analog beam field type ABF1 is used. Beam C, or the receiving beams A and B of the analog beam field type ABF0 is used for channel measurement.

Assume that after performing channel measurement on each of the reference signals CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, and CSI-RS # S4, the order of the strength of the signal quality of each reference signal obtained is Large to small are CSI-RS # S2, CSI-RS # S1, CSI-RS # S3, and CSI-RS # S4. Then, according to the channel measurement results, the CSI-RS # S2 with the strongest signal quality is selected as the candidate reference signal and reported to the base station 806, and the channel status information corresponding to the candidate reference signal CSI-RS # S2 can be further reported to the base. Platform 806. The communication device 802 may report only the index value of the reference signal CSI-RS, for example, one of the index values S1 to S4.

In this way, the purpose of allowing both the base station 806 and the communication device 802 to use the second component carrier (for example, the primary component carrier) and the first component carrier (for example, the secondary component carrier) for downlink transmission can be achieved at the same time.

Here is another example to illustrate it. Please refer to FIGS. 9A to 9C, which are schematic diagrams illustrating another example of a method for reporting channel state information using the embodiment disclosed in FIG. 6. Different from FIGS. 8A to 8C, the communication device 902 has only one analog beam field type ABF. As shown in Figure 9A, when the base station 906 uses the second component carrier (such as the main component carrier) to communicate with the communication device 902, it chooses to use the reference signal CSI-RS # P2 of the reference signal configuration 905 and the communication device. The receiving beam B of 902 communicates. In this way, the method for limiting the channel measurement of the second component carrier may be, as shown in FIG. 9B and FIG. 9C, the reference signals CSI-RS # S1, CSI-RS # S2, and CSI-RS # Each of S3 and CSI-RS # S4 performs channel measurement without using the receiving beam A for channel measurement, but only using the receiving beam B for channel measurement. In this way, the purpose of simultaneously allowing the base station 906 and the communication device 902 to use the second component carrier (for example, the primary component carrier) and the first component carrier (for example, the secondary component carrier) for downlink transmission can be achieved at the same time.

The method for reporting channel state information of the wireless communication system according to the embodiment of the disclosure may further include a step of reporting a flag. This flag is used to indicate whether the aforementioned candidate reference signal is related to the first spatial domain receive filter. Here is an example. Please refer to FIGS. 10A to 10C, which are schematic diagrams illustrating still another example of a method for reporting channel state information using the embodiment disclosed in FIG. 6. Different from FIGS. 8A to 8C, when the communication device 1002 reports the candidate reference signal and the channel state information corresponding to the candidate reference signal to the base station 1006, the communication device 1002 will report the value of the flag at the same time. FIG. 10B shows a state where the value of the flag Flag is ON (for example, 1), and FIG. 10C shows a state where the value of the flag Flag is OFF (for example, 0). That is, FIG. 10B shows that the selected candidate reference signal is related to the first spatial domain receiving filter (for example, corresponding to the receiving beam C), or can be related to the component carrier of the main serving cell, or to the base. The constituent carriers of the serving cells configured or designated by the station are related. For example, in the measurement and reporting process of the selected candidate reference signal, the receiving beam C for receiving the reference signal 1004 in FIG. 10A is considered. That is, in FIG. 10B, when channel measurement is performed on at least one reference signal of the first component carrier (for example, the secondary component carrier), the channel measurement may be performed using the receiving beams C, N ~ Q. FIG. 10C shows a case where the selected candidate reference signal is not related to the first spatial domain receiving filter (for example, corresponding to the receiving beam C), for example, in the measurement and reporting process of the selected candidate reference signal, The receiving beam C for receiving the reference signal 1004 in FIG. 10A is not taken into consideration. That is, in FIG. 10C, when channel measurement is performed on at least one reference signal of the first component carrier (for example, the secondary component carrier), the channel quantity can be measured using all the receiving beams A ~ D, N ~ Q. Measurement.

In this way, by using the flag, the base station 1006 can know whether the candidate reference signal reported by the communication device 1002 is related to the first spatial domain receiving filter (for example, corresponding to the receiving beam C). In this way, when the base station 1006 uses the candidate reference signal for data transmission between the first component carrier (for example, the secondary component carrier) and the communication device 1002, it can know whether the second serving cell (corresponding to the second component carrier) can be used at the same time. (For example, the main component carrier)) for downlink transmission.

The method for reporting channel state information of the wireless communication system according to the embodiment of the disclosure may further include a step of reporting a parameter. This parameter is used to indicate the index value or code of the second serving cell related to the first spatial domain receiving filter. For example, this parameter is used to indicate that the selected candidate reference signal is related to the index value or code of a serving cell or a carrier, or to the reference signal used by the main serving cell, or to the serving cell configured or designated by the base station. The reference signal used is related. Here is an example. Please refer to FIGS. 11A to 11E, which are schematic diagrams illustrating a further example of a method for reporting channel state information using the embodiment disclosed in FIG. 6. Different from the diagrams in FIGS. 8A to 8C, when the communication device 1102 reports the candidate reference signal and the channel state information corresponding to the candidate reference signal to the base station 1106, the communication device 1102 will simultaneously report a parameter value to indicate that An index value or code of a second serving cell associated with a spatial domain receive filter (eg, corresponding to the receive beam C).

As shown in FIG. 11A, it is assumed that the base station 1106 communicates with the receiving beam C of the communication device 1102 by using the reference signal 1104 of the second serving cell. As shown in FIG. 11B, it is assumed that the base station 1106 communicates with the receiving beam P of the communication device 1102 by using a reference signal 1104 'of a third serving cell. In this way, when the beam management procedure is performed on the first service cell, at least one first reference signal corresponding to the reference signal configuration of the first service cell is received, and channel measurement is performed on each of the first reference signals to obtain In the process of candidate reference signals, the receiving beam C corresponding to the second serving cell and the receiving beam P corresponding to the third serving cell may be considered separately to obtain the candidate reference signal.

As shown in FIG. 11C, if the receiving beam C of the second serving cell is considered, when the candidate reference signal and the corresponding channel state information are reported, the index value or code of the second serving cell may be reported at the same time. The index value of the second service cell is, for example, an identification code (ID) of the second service cell, and the code of the second service cell is, for example, a predefined value, such as code 01.

As shown in FIG. 11D, if the receiving beam P of the third service cell (for example, other sub-service cells except the main service cell and the sub-service cell) is considered, when the candidate reference signal and the corresponding channel state information are reported, , Can return the index value or code of the third service cell at the same time. The index value of the third service cell is, for example, an identification code (ID) of the third service cell, and the code of the third service cell is, for example, a predefined value, such as the code 10.

As shown in FIG. 11E, if the receiving beam of the second serving cell or the third serving cell is not considered, when the candidate reference signal and the corresponding channel state information are reported, the index value or code of the first serving cell itself may be reported at the same time. . The index value of the first service cell is, for example, an identification code (ID) of the first service cell, and the code of the first service cell is, for example, a predefined value, such as the code 00.

In this way, by using the parameters, the base station 1102 can know whether the candidate reference signal reported by the communication device 1106 is related to the second serving cell or the third serving cell. In this way, when the base station 1102 uses the candidate reference signal to perform data transmission between the first serving cell (for example, the secondary serving cell) and the communication device 1106, it can know whether the second serving cell (for example, the primary serving cell) can be used at the same time or The third serving cell (another serving cell) performs downlink transmission.

Although in the above example, the second service cell is used as the main service cell, and the second component carrier is, for example, the main component carrier as an example, the second service cell may also be a service cell predetermined by the base station and the first service cell line Is a service cell different from the second service cell. The second service cell may also be a service cell predetermined by the base station, that is, another service cell that is not a main service cell. among them. The second service cell is different from the first service cell line.

In addition, the first serving cell and the second serving cell (or the first component carrier and the second component carrier) may correspond to non-co-located transmission reception points (Non-co-located TRPs) or Co-located TRPs. For non-co-located transceiver nodes, due to the different geographical distribution between the transceiver nodes (for example, base stations), the user device can use different receive beams to receive different transmit beams sent from different transceiver nodes. For co-located transceiver nodes, there may still be power differences between the different component carriers. Even if data is transmitted through the same transmission beam at the base station side, and the user device receives data with the same reception beam, even on adjacent serving cells, there may still be significant power differences.

The embodiment of the disclosure further proposes a method for detecting channel state information, which is used in a base station of a wireless communication system. The method includes transmitting at least a first reference signal corresponding to a first service cell; a communication device in the wireless communication system performs channel measurement on each of the at least one first reference signal, and according to the at least one After obtaining a candidate reference signal as a result of channel measurement of the first reference signal, the candidate reference signal is received; and channel status information corresponding to the candidate reference signal is received.

The embodiment of the disclosure further provides a communication device for reporting channel state information. The communication device includes a transceiver unit and a processor. The transceiver unit is configured to receive at least one first reference signal corresponding to a first service cell. The processor is electrically connected to the transceiver unit for performing channel measurement on each of the at least one first reference signal, and obtaining a candidate reference based on a result of the channel measurement of the at least one first reference signal. Signal. The processor is further configured to report channel status information corresponding to the candidate reference signal through the transceiver unit.

The embodiment of the disclosure further provides a base station for detecting channel state information. The base station includes a transceiver unit and a processor. The transceiver unit is configured to send at least a first reference signal corresponding to a first service cell. The processor is electrically connected to the transceiver unit, and is configured to perform channel measurement on each of the at least one first reference signal in a communication device of a wireless communication system through the transceiver unit, and according to the at least one first After obtaining a candidate reference signal as a result of channel measurement of a reference signal, the candidate reference signal is received. The processor is further configured to receive channel status information corresponding to the candidate reference signal through the transceiver unit.

With the method and method for reporting channel state information and the communication device and base station of the embodiments of the present disclosure described above, it can cooperate with carrier aggregation technology and use multiple service cells at the same time to improve the data transmission rate. The transmission of burst data provides sufficient frequency resources to improve transmission efficiency.

In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

102, 202, 302, 402‧‧‧ user equipment

104, 204 (0) ~ 204 (7), 404 (1), 703, 704 (0) ~ 704 (7), 1004, 1104, 1104’‧‧‧ reference signal

106, 206, 406, 706, 806, 906, 1006, 1106‧‧‧ base station

203, 805, 905‧‧‧ reference signal configuration

502, 504, 506‧‧‧ area

BW0, BW1‧‧‧‧Band

602, 604, 606, 608‧‧‧ process steps

700‧‧‧Wireless communication system

702, 802, 902, 1002, 1102‧‧‧ communication device

708, 710‧‧‧antenna panel

ABF0, ABF1, ABF‧‧‧Analog beam pattern

A, B, C, D, N, O, P, Q‧‧‧ receive beam

CSI-RS # P1, CSI-RS # P2, CSI-RS # P3, CSI-RS # P4, CSI-RS # S1, CSI-RS # S2, CSI-RS # S3, CSI-RS # S4‧‧‧ Reference signal

FIG. 1A is a schematic diagram of a wireless communication system for performing communication by using a main component carrier. FIG. 1B shows a schematic diagram of a wireless communication system for performing communication by using a sub-carrier. Figure 2 is a schematic diagram of the beam management procedure. FIG. 3A illustrates a schematic diagram of a user equipment having a set of analog beamforming. FIG. 3B is a schematic diagram showing that the user equipment has two sets of analog beamforming. Figures 4A ~ 4D are schematic diagrams illustrating an example of a user equipment that cannot perform a receiving operation of downlink transmission from multiple serving cells simultaneously. Fig. 5 is a schematic diagram showing data transmitted on the receiving service cells CC0 and CC1 corresponding to Figs. 4A to 4D. FIG. 6 shows a flowchart of a method for reporting channel state information according to an embodiment of the disclosure. 7A to 7B are schematic diagrams of a wireless communication system corresponding to the flowchart of FIG. 6. 8A to 8C are schematic diagrams illustrating an example of a method for reporting channel state information using the embodiment disclosed in FIG. 6. 9A to 9C are schematic diagrams illustrating another example of a method for reporting channel state information using the embodiment disclosed in FIG. 6. Figures 10A-10C are schematic diagrams illustrating yet another example of the method for reporting channel state information using the embodiment disclosed in Figure 6; 11A to 11E are schematic diagrams illustrating still another example of a method for reporting channel state information using the embodiment disclosed in FIG. 6.

Claims (44)

A method for reporting channel state information is used in a communication device of the wireless communication system. The method includes: receiving at least one first reference signal corresponding to a first service cell; each of the at least one first reference signal One performs channel measurement; obtains a candidate reference signal based on the channel measurement result of the at least one first reference signal; and reports channel state information corresponding to the candidate reference signal. The method according to item 1 of the patent application scope further comprises: receiving at least one reference signal configuration for reference, the at least one first reference signal is related to the reference signal configuration for reference. The method according to item 2 of the scope of patent application, wherein the reference signal configuration for reference is corresponding to a second service cell, and the communication device has at least one spatial domain receiving filter, and the at least one first In the step of performing the channel measurement by each of the reference signals, at least a part of the at least one spatial domain receiving filter that can receive at the same time as the second service cell is selected, or a reference signal that can be used with the reference is selected. Configure at least a part of the at least one spatial domain receive filter that is received simultaneously to perform channel measurement. The method according to item 1 of the patent application scope further comprises: receiving at least one serving cell identification code, and the at least one first reference signal is related to the at least one serving cell identification code. The method according to item 4 of the scope of patent application, wherein the at least one serving cell identification code corresponds to a second serving cell, the communication device has at least one spatial domain receiving filter, and the at least one first In the step of performing channel measurement by each of the reference signals, at least one spatial-domain receiving filter capable of receiving at least part of the second serving cell at the same time is selected. The method according to item 1 of the scope of patent application, wherein a first spatial domain receiving filter of the communication device of the wireless communication system is used to receive a second reference signal of a second serving cell, and the candidate reference The signal is related to the first spatial domain receiving filter. The method according to item 6 of the scope of patent application, wherein the communication device has a first antenna plate and a second antenna plate, and the first antenna plate is used to generate the first spatial domain reception filter. And at least a second spatial domain receiving filter, the second antenna plate is used to generate at least a third spatial domain receiving filter, and the result is obtained according to a channel measurement result of the at least one first reference signal. In the step of candidate reference signal and the step of reporting the channel state information corresponding to the candidate reference signal, it is not selected to use the reference signal received by the at least one second spatial domain receive filter as the candidate reference signal or not to report. Use channel state information of a reference signal received by the at least one second spatial domain receive filter. The method according to item 6 of the scope of patent application, wherein the communication device can simultaneously use the candidate reference signal and the second reference signal at the first serving cell, the second serving cell, and the base station, respectively. To communicate. The method according to item 6 of the patent application scope further includes: reporting a flag, which is used to indicate whether the candidate reference signal is related to the first spatial domain receiving filter. The method according to item 6 of the scope of patent application, further comprising: returning a parameter, which is used to indicate an index value or code of the second serving cell related to the first spatial domain receiving filter. The method of claim 6, wherein the first service cell line is a secondary service cell and the second service cell is a primary service cell, or the second service cell is a predetermined service cell and the first service cell The service cell line is a service cell different from the second service cell. A method for detecting channel state information is used in a base station of a wireless communication system. The method includes: sending at least a first reference signal corresponding to a first service cell; and a communication device in the wireless communication system. Performing channel measurement on each of the at least one first reference signal, and receiving a candidate reference signal based on a result of the channel measurement of the at least one first reference signal, and receiving the candidate reference signal; Channel status information for one of the candidate reference signals. The method according to item 12 of the patent application scope further comprises: transmitting at least one reference signal configuration for reference, the at least one first reference signal is related to the reference signal configuration for reference. The method according to item 13 of the scope of patent application, wherein the reference signal configuration for reference is corresponding to a second service cell, and the communication device has at least one spatial domain receiving filter, and the at least one first In the step of performing the channel measurement by each of the reference signals, at least a part of the at least one spatial domain receiving filter that can receive at the same time as the second service cell is selected, or a reference signal that can be used with the reference is selected. Configure at least a part of the at least one spatial domain receive filter that is received simultaneously to perform channel measurement. The method according to item 12 of the patent application scope further comprises: transmitting at least one serving cell identification code, and the at least one first reference signal is related to the at least one serving cell identification code. The method according to item 15 of the scope of patent application, wherein the at least one serving cell identification code corresponds to a second serving cell, the communication device has at least one spatial domain receiving filter, and the at least one first In the step of performing channel measurement by each of the reference signals, at least one spatial-domain receiving filter capable of receiving at least part of the second serving cell at the same time is selected. The method according to item 12 of the scope of patent application, wherein a first spatial domain receiving filter of the communication device of the wireless communication system is used to receive a second reference signal of a second serving cell, and the candidate reference The signal is related to the first spatial domain receiving filter. The method according to item 17 of the scope of patent application, wherein the communication device has a first antenna plate and a second antenna plate, and the first antenna plate is used to generate the first spatial domain reception filter. And a second spatial domain receiving filter, the second antenna plate is used to generate at least a third spatial domain receiving filter, in the steps of receiving the candidate reference signal and receiving the candidate corresponding to the candidate reference signal In the channel state information step, the reference signal received by the at least one second spatial domain receiving filter is not selected as the candidate reference signal, or the reference received by the at least one second spatial domain receiving filter is not reported. Channel status information for the signal. The method according to item 17 of the scope of patent application, wherein the base station can use the candidate reference signal and the second reference signal simultaneously to communicate with the first service cell and the second service cell, respectively. Device for communication. The method according to item 17 of the patent application scope further comprises: receiving a flag, which is used to indicate whether the candidate reference signal is related to the first spatial domain reception filter. The method according to item 17 of the patent application scope further comprises: receiving a parameter, which is used to indicate an index value or code of the second service cell related to the first spatial domain receiving filter. The method according to item 17 of the scope of patent application, wherein the first service cell line is a secondary service cell and the second service cell is a primary service cell, or the second service cell is a predetermined service cell and the first The service cell line is a service cell different from the second service cell. A communication device for reporting channel status information includes: a transceiver unit for receiving at least a first reference signal corresponding to a first service cell; and a processor electrically connected to the transceiver unit for Performing channel measurement on each of the at least one first reference signal, and obtaining a candidate reference signal according to a result of the channel measurement of the at least one first reference signal; wherein the processor is further configured to pass through the The transceiver unit reports channel state information corresponding to one of the candidate reference signals. The communication device according to item 23 of the patent application scope, wherein the transceiver unit is further configured to receive at least one reference signal configuration for reference, and the at least one first reference signal is related to the reference signal configuration for reference. The communication device described in item 24 of the scope of patent application, wherein the reference signal configuration for reference is corresponding to a second service cell, and the communication device has at least one spatial-domain receiving filter. When each channel of a reference signal performs channel measurement, at least a part of the at least one spatial domain receiving filter that can receive at the same time as the second service cell is selected, or a reference signal configuration that can be used with the reference is selected. Simultaneously receiving at least part of the at least one spatial domain receive filter to perform channel measurement. The communication device according to item 23 of the patent application scope, wherein the transceiver unit is further configured to receive at least one serving cell identification code, and the at least one first reference signal is related to the at least one serving cell identification code. The communication device according to item 26 of the patent application scope, wherein the at least one serving cell identification code corresponds to a second serving cell, and the communication device has at least one spatial domain receiving filter, and the at least one first When each of the reference signals performs the channel measurement, at least a part of the at least one spatial domain receiving filter that can receive at the same time as the second serving cell is selected. The communication device according to item 23 of the scope of patent application, wherein a first spatial domain receiving filter of one of the communication devices of the wireless communication system is used to receive a second reference signal of a second serving cell, and the candidate The reference signal is related to the first spatial domain receiving filter. The communication device according to item 28 of the scope of patent application, wherein the communication device has a first antenna plate and a second antenna plate, and the first antenna plate is used to generate the first spatial domain reception. A filter and at least a second spatial domain receiving filter, the second antenna plate is used to generate at least a third spatial domain receiving filter, and is measured by the processor according to the channel of the at least one first reference signal As a result, when the candidate reference signal is obtained and the processor reports the channel state information corresponding to the candidate reference signal through the transceiver unit, the reference signal received by the at least one second spatial domain receive filter is not selected as the reference signal. The candidate reference signal does not report channel state information of the reference signal received using the at least one second spatial domain receive filter. The communication device according to item 28 of the scope of patent application, wherein the communication device can simultaneously use the candidate reference signal and the second reference signal on the first service cell and on the second service cell, respectively. This base station communicates. The communication device according to item 28 of the scope of patent application, wherein the processor is further configured to report a flag through the transceiver unit, and the flag is used to indicate whether the candidate reference signal is filtered by the first spatial domain. Device related. The communication device according to item 28 of the scope of patent application, wherein the processor is further configured to report a parameter through the transceiver unit, and the parameter is used to instruct the second service related to the first spatial domain reception filter. The index value or code of the cell. The communication device according to item 28 of the scope of patent application, wherein the first service cell line is a secondary service cell and the second service cell is a primary service cell, or the second service cell is a predetermined service cell and the first service cell A service cell line is a service cell different from the second service cell. A base station for detecting channel status information includes: a transceiver unit for sending at least a first reference signal corresponding to a first service cell; a processor electrically connected to the transceiver unit for A channel measurement is performed on each of the at least one first reference signal by a communication device of a wireless communication system through the transceiver unit, and a candidate is obtained according to a result of the channel measurement of the at least one first reference signal. After the reference signal, the candidate reference signal is received; and the processor is further configured to receive channel status information corresponding to the candidate reference signal through the transceiver unit. The base station according to item 34 of the scope of patent application, wherein the processor is further configured to send at least one reference signal configuration through the transceiver unit, and the at least one first reference signal is related to the reference signal. Configuration related. The base station according to item 35 of the scope of patent application, wherein the reference signal configuration for reference is corresponding to a second service cell, and the communication device has at least one spatial-domain receiving filter. When performing channel measurement for each of the at least one first reference signal, at least one of the at least one spatial domain receiving filter that can receive at the same time as the second serving cell is selected, or one that can be used with the reference is selected. The at least one spatial domain receiving filter configured to receive at least a portion of the signals received simultaneously with reference signal is configured to perform channel measurement. The base station according to item 34 of the scope of patent application, wherein the processor is further configured to send at least one serving cell identification code through the transceiver unit, and the at least one first reference signal is related to the at least one serving cell identification code. . The base station according to item 37 of the scope of patent application, wherein the at least one serving cell identification code corresponds to a second serving cell, the communication device has at least one spatial domain receiving filter, When performing channel measurement for each of the at least one first reference signal, at least one spatial domain receiving filter capable of receiving at least a portion of the channel simultaneously with the second serving cell is selected. The base station according to item 34 of the scope of patent application, wherein a first spatial domain receiving filter of the communication device is used to receive a second reference signal of a second serving cell, and the candidate reference signal is related to the second reference signal. The first spatial domain receive filter is correlated. The base station as described in claim 39, wherein the communication device has a first antenna plate and a second antenna plate, and the first antenna plate is used for generating the first space domain reception. A filter and at least a second spatial domain receiving filter, the second antenna plate is used to generate at least a third spatial domain receiving filter, and when the communication device measures it according to the channel of the at least one first reference signal As a result, when the candidate reference signal is obtained, and when the communication device reports the channel state information corresponding to the candidate reference signal, the reference signal received by the at least one second spatial domain receive filter is not selected as the candidate reference signal. , Or does not report channel state information of the reference signal received using the at least one second spatial domain receive filter. The base station according to item 39 of the scope of patent application, wherein the base station can use the candidate reference signal and the second reference signal at the same time on the first service cell and on the second service cell, respectively. The communication device performs communication. The base station as described in claim 39, wherein the processor further receives a flag through the transceiver unit, and the flag is used to indicate whether the candidate reference signal is related to the first spatial domain reception filter. . According to the base station described in claim 39, the processor further receives a parameter through the transceiver unit, and the parameter is used to indicate an index value of the second service cell related to the first spatial domain receive filter. Or code. The base station according to item 39 of the scope of patent application, wherein the first service cell line is a secondary service cell and the second service cell is a primary service cell, or the second service cell is a predetermined service cell and the first service cell A service cell line is a service cell different from the second service cell.