TWI719378B - 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

Channel status information reporting method and detection method, and communication Device and base station

The present invention relates to a method for reporting channel status information and a detection method, as well as a communication device and a base station.

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, how to use the Beam Management Framework to provide services on multiple serving cells (for example, operating at frequencies higher than 6GHz), especially for different transmission 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 be able to use carrier aggregation technology to improve data transmission efficiency. Therefore, how to solve the above-mentioned problems in order to increase the data transmission rate in a system using carrier aggregation technology is one of the directions that the industry is committed to.

According to the first embodiment of the present invention, a method for reporting channel status information is proposed, which is used in a communication device of a wireless communication system. This method includes the following steps. At least one first reference signal corresponding to a first serving cell is received. Perform channel measurement 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. Report the channel status information corresponding to one of the candidate reference signals.

According to another embodiment of the present invention, a method for detecting channel status information is provided, which is used in a base station of a wireless communication system. The method includes the following steps. At least one first reference signal corresponding to a first serving cell is issued. After a communication device of the wireless communication system performs channel measurement on each of the at least one first reference signal, and obtains a candidate reference signal according to the result of the channel measurement of the at least one first reference signal, it receives the 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 status information is provided. The communication device includes a transceiver unit and a processor. The transceiver unit is used for receiving at least one first reference signal corresponding to a first serving cell. The processor is electrically connected to the transceiver unit to perform channel measurement on each of the at least one first reference signal, and obtain a candidate reference based on the result of the channel measurement of the at least one first reference signal Signal. Wherein, the processor is further used for reporting 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 status information is provided. The base station includes a transceiver unit and a processor. The transceiver unit is used for sending at least one first reference signal corresponding to a first serving cell. The processor is electrically connected to the transceiver unit for performing 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 reference signal After a candidate reference signal is obtained as a result of channel measurement of a reference signal, the candidate reference signal is received. The processor is further used for receiving 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 given in conjunction with the accompanying drawings to describe in detail as follows:

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: frequency band

602, 604, 606, 608: process steps

700: wireless communication system

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

708, 710: Antenna plate

ABF0, ABF1, ABF: analog beam field pattern

A, B, C, D, N, O, P, Q: receiving 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 shows a schematic diagram of a wireless communication system that communicates by using a main component carrier.

Figure 1B shows a schematic diagram of a wireless communication system that uses secondary component carriers to communicate.

Figure 2 shows a schematic diagram of the beam management procedure.

Figure 3A shows a schematic diagram of a set of analog beamforming in the user equipment.

Figure 3B shows a schematic diagram of the user equipment having two sets of analog beamforming.

Figures 4A to 4D are schematic diagrams showing an example in which the user equipment cannot simultaneously perform downlink transmission receiving actions from multiple serving cells.

Figure 5 shows a schematic diagram of the data transmitted on the receiving service cells CC0 and CC1 corresponding to Figures 4A to 4D.

Figure 6 shows a flowchart of a method for reporting channel status information according to an embodiment of the present disclosure.

Figures 7A-7B show schematic diagrams of the wireless communication system corresponding to the flowchart in Figure 6.

FIGS. 8A to 8C are schematic diagrams showing an example of the channel status information reporting method of the embodiment of the present disclosure in FIG. 6.

Figures 9A-9C are schematic diagrams of another example of the channel status information reporting method of the embodiment of the present disclosure applied in Figure 6.

FIGS. 10A to 10C are schematic diagrams showing yet another example of the channel status information reporting method of the embodiment of the present disclosure in FIG. 6.

Figures 11A to 11E show a schematic diagram of another example of the channel status information reporting method of the embodiment of the present disclosure in Figure 6.

The embodiment of the present disclosure allows a base station (for example, a 5G base station (next Generation Node B, gNodeB)) to know whether a user equipment (UE) can perform downlink transmission via multiple serving cells at the same time ( Downlink, DL) to receive information. The plurality of service cells are, for example, a plurality of service cells operating at a frequency above 6 GHz. The user equipment receives information via a physical downlink share channel (PDSCH), for example.

Please refer to Figures 1A and 1B. Figure 1A shows a schematic diagram of a system that uses the primary component carrier (Primary Component Carrier, PCC) for wireless communication, and Figure 1B shows a system diagram that uses the secondary component carrier ( Secondary Component Carrier, SCC) for wireless communication system diagram. 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. For example, analog beamforming has 4 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.

Suppose that after the first beam management (BM) procedure, the user equipment 102 decides to use the receiving beam C of the analog beamforming ABF0 to receive the reference signal (Reference signal) 104 of the main component carrier in order to communicate with the base station 106 The main component of the carrier performs the receiving action of the downlink transmission. Different reference signals are, for example, transmission beams pointing in different directions. As shown in Figure 1B, after the first beam management procedure, the user equipment 102 can decide to use analog beamforming ABF0 receiving beam C and analog beamforming ABF1 receiving beam N, O, P, Q among five First, to receive the reference signal of the secondary component carrier to perform the downlink transmission reception action on the secondary component carrier of the base station 106. In this way, when the downlink transmission is officially received, the user equipment 102 can receive the data transmitted on the primary component carrier and the secondary component carrier at the same time, that is, for example, the receiving beam C of the analog beamforming ABF0 is used to receive the primary component carrier at the same time. The data transmitted on the component carrier and the secondary component carrier, or the receiving beam C of the analog beamforming ABF0 to receive the receiving beam N of the main component carrier and the analog beamforming ABF1, One of O, P, and Q receives the data transmitted on the secondary component carrier. In this way, the data transfer rate can be effectively improved.

Here is a brief description of the above beam management procedures as follows. Please refer to Figure 2, which shows a schematic diagram of the beam management procedure. Assume that the base station 206 cannot know the information related to 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, on each serving cell, the base station and the user equipment independently execute the beam management program.

The general beam management procedure mainly includes the following 3 steps. First, the base station 206 provides a reference signal configuration for the beam management program. That is, for each serving cell, the user equipment 202 can be configured with at least one reference signal configuration for management or measurement of beam or channel status information. For example, as shown in Figure 2, the base station 206 provides a reference signal configuration 203 composed of reference signals 204(0) to 204(7).

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

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

Here is a brief description of the above-mentioned analog beamforming. Please refer to FIGS. 3A and 3B. FIG. 3A shows a schematic diagram of the user equipment having one set of analog beamforming, and FIG. 3B shows a schematic diagram of the user equipment having two sets of analog beamforming. Analog beamforming ABF0 has a second set of receiving beams, namely receiving beams A, B, C, and D, while analog beamforming ABF1 has a first set of receiving beams, namely receiving beams N, O, P, and Q. For the analog beamforming ABF0, the user equipment 302 may have to use Time Division Multiplexing (TDM) to receive the data transmitted through the receiving beams A, B, C, and D. For the analog beamforming ABF1, the user equipment 302 may also have to use time division multiplexing to receive the data transmitted through the receiving beams N, O, P, and Q. Each group of receiving beams is on the user equipment 302 side, and signals are received through at most one receiving beam. The user equipment 302 can simultaneously perform downlink transmission receiving operations in different groups (for example, the first group and the second group). Among them, different user equipment 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 simultaneously perform downlink transmission receiving actions from multiple serving cells. Please refer to Figures 4A~4D, which shows an example of the user equipment being unable to simultaneously perform downlink transmission receiving actions from multiple service cells Figure. As shown in FIG. 4A, suppose that after the beam management procedure, for the serving cell CC0, the user equipment 402 selects the reference signal 404(1) and reports to the base station 406. The user equipment 402 receives the reference signal 404 through the receiving beam A (1).

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

Then, during the formal data transmission, as shown in Figure 4C, the base station 406 can use the reference signal 404(1) for data transmission on the serving cell CC0, and the user equipment 402 can receive the reference through the receiving beam A The data transmitted on signal 404(1). Moreover, during the formal data transmission, as shown in Figure 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 The data transmitted on signal 404(1). However, since the user equipment 402 is used to receive the data of the reference signal 404(1) on the serving cells CC0 and CC1, it uses different receiving beams A and B, respectively. Therefore, it is impossible to receive beams A and B at the same time. The problem of receiving the data sent by the service cells CC0 and CC1 at the same time.

Please refer to Figure 5, which shows a schematic diagram of the data transmitted on the receiving service cells CC0 and CC1 corresponding to Figures 4A to 4D. Suppose that between time points t1 and t3 (as shown in the area 502), the base station 406 uses the service cell CC0 corresponding to the frequency band BW0 to transmit data, and the user equipment 402 uses the receiving beam corresponding to the reference signal 404(1) A to receive information. Suppose that between time points t2 and t4 (as shown in the area 504), the base station 406 uses the service cell CC1 corresponding to the frequency band BW1 to transmit data, and the user equipment 402 uses the receiving beam corresponding to the reference signal 404(1) B to receive information. However, between t2 and t3 (such as 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 be able to receive the data sent by the base station 406 via the serving cell CC0 or via the serving cell CC1. The data sent by the service cells CC0 and CC1 cannot be received 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, under such a situation, there may be a situation where the data reception quality of one of the service cells (CC0 or CC1) is not good. In this way, the carrier aggregation technology of serving cells CC0 and CC1 can not be used at the same time to increase the data transmission rate, and sufficient frequency resources cannot be provided for the transmission of burst data.

In order to solve the above-mentioned problem, the embodiment of the present disclosure proposes a method for reporting channel status information of a wireless communication system. Please refer to FIG. 6, which shows a flowchart of a method for reporting channel status information according to an embodiment of the present disclosure. Please also refer to Figures 7A~7B, which shows a schematic diagram of the wireless communication system corresponding to the flowchart in Figure 6. This method is used in the communication device 702 of the wireless communication system 700.

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

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

The aforementioned method for reporting channel status information further includes the step of receiving at least one serving cell identification code and/or a reference signal configuration (Reference RS (reference signal) configuration). 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 reference.

Wherein, the at least one serving cell identification code and/or the reference signal configuration for 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 at least one first reference signal, at least one spatial domain receiving filter that can receive at least part of the second serving cell is selected, or alternatively, it can be used with The reference signal for the reference configures at least part of the at least one spatial domain receiving filter received simultaneously to perform channel measurement.

The above-mentioned reference signal configuration for reference is, for example, related to the candidate reference signal quasi co-location (QCL). For example, the above-mentioned reference signal configuration for reference and candidate reference signal quasi-co-location means that when the client device uses a specific receive beam to receive the reference signal configuration for reference, the client device also uses this specific receive beam to receive the candidate. Reference signal. Among them, the definition of quasi-parity can refer to the 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution, long term evolution technology) specification or the definition of the 3GPP NR specification.

Wherein, 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 the 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 used to use the second reference signal (for example, the reference signal 703) of the second serving cell and use the first space The communication device 702 of the domain receiving filter performs communication. The candidate reference signal is related to the above-mentioned first spatial domain receiving filter. For example, the second reference signal and the candidate reference signal are quasi-coordinated. For example, when the UE uses a specific receiving beam to receive the second reference signal, the UE also uses the specific receiving beam to receive the candidate reference signal.

Among them, the spatial domain receiving filter is achieved by, for example, the aforementioned antenna plate used to generate an analog beam pattern with multiple beams. The beam in this document can be achieved by an antenna, an antenna port, an antenna element, a set of antennas, a set of antenna ports, a set of antenna elements, or a spatial domain filter. An antenna panel 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, respectively). At least one spatial domain filter is used to realize the above-mentioned function of receiving beams for 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 communication device 702 in the first serving cell and the second serving cell, respectively. The first serving cell is, for example, a secondary serving cell and the second serving cell is, for example, a primary serving cell. Or 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 service cell lines correspond to different signal transmission frequency bands, or different component carriers. In another embodiment, different service cells can also use the same or different signal transmission frequency bands, but use time division multiplexing to transmit data in different time segments. give away. In yet another embodiment, different service cell lines use different encoding methods to transmit data.

The communication device 702 is, for example, a user equipment. The aforementioned at least one first reference signal is, for example, reference signals 704(0) to 704(7). In the first serving cell (for example, the secondary serving cell), for example, communication is performed by the secondary component carrier. In the second serving cell (for example, the main serving cell), for example, the communication is performed by the main component carrier, or the communication is performed by the component carrier designated by the base station (for example, using the upper layer signal). The aforementioned at least one service cell identification code is, for example, the service cell identification code of the second service cell (for example, the main service cell), or the service cell identification code of the service cell configured or designated by the 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 serving cell.

The above-mentioned candidate reference signal is related to the first spatial domain receiving filter, which means that when the communication device 702 uses the first spatial domain receiving filter in the second service cell to receive the second reference signal from the base station 706, the communication device 702 The first spatial domain receiving filter can also be used to receive the candidate reference signal from the base station 706. Or, when the communication device 702 uses the first spatial domain receiving filter in the second service cell to receive the second reference signal from the base station 706, the communication device 702 can also use other different from the first spatial domain receiving filter. The spatial domain receiving filter receives the candidate reference signal from the base station 706. This allows the base station 706 to simultaneously use the candidate reference signal and the second reference signal to communicate with the communication device 702 in the first serving cell and the second serving cell, respectively.

For example, suppose 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 The platform 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 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 can simultaneously receive the reference signal 703 and the candidate reference signal (which can be one of the reference signals 704(0)~704(7)) from the base station 706 with the receiving beam C; or the communication device 702 can use The receiving beam C receives the reference signal 703 from the base station 706, and at the same time receives the candidate reference signal from the base station 706 by one of the receiving beams N, O, P, and Q (can be reference signals 704(0)~704(7) ) One of them), so that the base station 706 and the communication device 702 can simultaneously use 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 .

One of the implementation examples to achieve the above-mentioned objective can be achieved by limiting the measurement time. 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 receiving beam C) and at least one second spatial domain receiving filter (for example, corresponding to receiving beams A, B, D). The second antenna plate 710 is used to generate at least one third spatial domain receiving filter (for example, corresponding to receiving beams N, O, P, Q). According to the channel measurement result of the at least one first reference signal, in the step 606 of obtaining the candidate reference signal, it is not selected to use at least one second spatial domain receiving filter (for example, corresponding to the receiving beams A, B, D). The reference signal as a candidate reference signal. For example, choose to use the first spatial domain receiving filter of the first antenna plate 708 (for example, corresponding to the receiving beam C), or the third spatial domain receiving filter of other antenna plates (for example, the antenna plate 710) (For example, corresponding to the receiving beams N, O, P, Q) the received reference signal is used as the candidate reference signal. That is, in step 604 of performing channel measurement on each of these first reference signals (reference signals 704(0)~704(7)), only the first space of the first antenna plate 708 is used Receiving filter (for example, corresponding to receiving beam C), or a third spatial receiving filter (for example, corresponding to receiving beams N, O, P, Q) of other antenna panels (for example, antenna panel 710) for channel volume Measurement. The reference signals received by the first spatial domain receiving filter (for example, corresponding to receiving beam C) and the third spatial domain receiving filter (for example, corresponding to receiving beams N, O, P, Q) are selected as candidate reference signals.

Another implementation example to achieve the above-mentioned objective can be achieved by restricting the reporting. For example, in the step 608 of reporting the channel status 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, D) is not reported Status information. For example, the channel state information of the reference signal received using these second spatial domain receiving filters (for example, corresponding to the receiving beams A, B, D) is not reported. That is, in the step 608 of reporting the 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 (for example, corresponding to the receiving beam C) is reported. Or, only report using the first spatial domain receiving filter of the first antenna plate 708 (for example, corresponding to the receiving beam C), or the third spatial domain receiving filter (for example, the antenna plate 710) of another antenna plate (for example, Corresponding to the channel status information of the reference signal received by the receiving beam (N, O, P, Q).

Here is an example to explain in further detail. Please refer to FIGS. 8A to 8C, which illustrate a schematic diagram of an example of the channel state information reporting method of the embodiment of the present disclosure in FIG. 6. To simplify the description, it is assumed that the communication device 802 has an analog beam field pattern 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 Figure 8A, when performing beam management procedures for the second component carrier (for example, the main component carrier), it is assumed that the base station 806 sends out 4 reference signals, which are coded CSI-RS#P1, CSI-RS#P2, CSI-RS#P3 and CSI-RS#P4 represent four reference signals from top to bottom. The CSI-RS stands for channel status information reference signal (channel status information reference signal). Suppose that when the base station 806 uses the second component carrier (for example, 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 to be performed on 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 signal CSI-RS#S1, CSI-RS#S2, CSI-RS#S3, CSI-RS#S4 (code CSI-RS#S1, CSI-RS#S2, CSI-RS#S3, CSI-RS#S4 Represents four reference signals from top to bottom). Then, the 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 Figure 8C, when performing channel measurement, the method of limiting during measurement is adopted. That is, when the channel measurement is performed on each of the reference signals CSI-RS#S1, CSI-RS#S2, CSI-RS#S3, CSI-RS#S4, the channel measurement is performed without using the receive beam D . That is, when performing channel measurement on each of the reference signals CSI-RS#S1, CSI-RS#S2, CSI-RS#S3, CSI-RS#S4, only the analog wave is used The receiving beam C of the beam field type ABF1 or the receiving beams A and B of the analog beam field type ABF0 are used for channel measurement.

Suppose that after channel measurement is performed on each of the reference signals CSI-RS#S1, CSI-RS#S2, CSI-RS#S3, and CSI-RS#S4, the signal quality order of the obtained reference signals is determined by Large to small are CSI-RS#S2, CSI-RS#S1, CSI-RS#S3, and CSI-RS#S4. Then, according to the channel measurement result, select the CSI-RS#S2 with the strongest signal quality as the candidate reference signal, report it to the base station 806, and further report the channel status information corresponding to the candidate reference signal CSI-RS#S2 to the base station Taiwan 806. Wherein, 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 base station 806 and the communication device 802 can simultaneously 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 at the same time.

Here is another example to illustrate. Please refer to FIGS. 9A to 9C, which show a schematic diagram of another example of the channel state information reporting method of the embodiment of the present disclosure in FIG. 6. Different from FIGS. 8A to 8C, the communication device 902 only has one analog beam field type ABF. As shown in Figure 9A, assuming that 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 of restricting the channel measurement of the second component carrier can be, as shown in Fig. 9B and Fig. 9C, by comparing the reference signals CSI-RS#S1, CSI-RS#S2, CSI-RS# When each of S3 and CSI-RS#S4 performs channel measurement, the receiving beam A is not used for channel measurement Measurement, and only the receiving beam B is used for channel measurement. In this way, the base station 906 and the communication device 902 can simultaneously 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 at the same time.

The method for reporting channel status information of the wireless communication system of the embodiment of the present disclosure may further include a step of reporting a flag. This flag is used to indicate whether the above-mentioned candidate reference signal is related to the first spatial domain receiving filter. Here is an example to illustrate. Please refer to FIGS. 10A to 10C, which show a schematic diagram of another example of the channel state information reporting method of the embodiment of the present disclosure in FIG. 6. Different from FIGS. 8A to 8C, when the communication device 1002 reports the candidate reference signal and the channel status 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). In other words, Figure 10B shows that the selected candidate reference signal is related to the first spatial domain receive filter (for example, corresponding to the receive beam C), or can be related to the component carrier of the main serving cell, or related to the base station. It is related to the component carrier of the service cell configured or designated by the station. For example, in the measurement and reporting process of the selected candidate reference signal, the receiving beam C used to receive the reference signal 1004 in FIG. 10A is taken into consideration. That is, in Figure 10B, when performing channel measurement on at least one reference signal of the first component carrier (for example, the secondary component carrier), the receiving beams C, N~Q can be used for channel measurement. Figure 10C shows a situation where the selected candidate reference signal is not related to the first spatial domain receive filter (for example, corresponding to the receive beam C). For example, during the measurement and reporting process of the selected candidate reference signal, The receiving beam C used to receive the reference signal 1004 in Figure 10A is not taken into consideration. In other words, in Figure 10C, when the first composition When performing channel measurement with at least one reference signal of a carrier (such as a sub-component carrier), all the receiving beams A~D and N~Q can be used for channel 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 to transmit data between the first component carrier (for example, the secondary component carrier) and the communication device 1002, it can know whether the second service 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 of the embodiment of the present disclosure may further include a step of reporting a parameter. This parameter is used to indicate the index value or code of the second service cell related to the first spatial domain receive filter. For example, this parameter is used to indicate that the selected candidate reference signal is related to a serving cell or the index value or code of the component carrier, or related to the reference signal used by the main serving cell, or related to the serving cell configured or designated by the base station The reference signal used is related. Here is an example to illustrate. Please refer to FIGS. 11A to 11E, which show a schematic diagram of another example of the channel state information reporting method of the embodiment of the present disclosure in FIG. 6. Different from Figures 8A to 8C, when the communication device 1102 reports the candidate reference signal and the channel status information corresponding to the candidate reference signal to the base station 1106, the communication device 1102 will also report the value of a parameter to indicate and A spatial domain receive filter (for example, corresponding to the receive beam C) related to the index value or code of the second serving cell.

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. Rudi 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 serving cell, at least one first reference signal corresponding to the reference signal configuration of the first serving cell is received, and the channel measurement is performed on each of these 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 can 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, the index value or code of the second serving cell can be reported at the same time when reporting the candidate reference signal and the corresponding channel state information. The index value of the second serving cell is, for example, the identification code (ID) of the second serving cell, and the code of the second serving cell is, for example, a predefined value, such as code 01.

As shown in Figure 11D, if the receiving beam P of the third serving cell (for example, other secondary serving cells other than the primary serving cell and the secondary serving cell) is considered, when reporting candidate reference signals and corresponding channel status information , Can report the index value or code of the third service cell at the same time. The index value of the third serving cell is, for example, the identification code (ID) of the third serving cell, and the code of the third serving cell is, for example, a predefined value, such as code 10.

As shown in Figure 11E, if the receiving beam of the second serving cell or the third serving cell is not considered, when reporting candidate reference signals and corresponding channel status information, the index value or code of the first serving cell itself can be reported at the same time . The index value of the first serving cell is, for example, the identification code (ID) of the first serving cell, and the code of the first serving 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 transmit data 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. The third serving cell (another secondary serving cell) performs downlink transmission.

Although in the above example, the second service cell is the main service cell, and the second component carrier is the main component carrier as an example, the second service cell can also be the service cell reserved by the base station and the first service cell line It 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, or may be other service cells that are not the 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 They are co-located transceiver nodes (Co-located TRPs). For non-co-located transceiver nodes, due to the difference in geographic distribution between the transceiver nodes (for example, base stations), the user device can use different receiving beams to receive different transmission beams sent from different transceiver nodes. For co-located transceiver nodes, there may still be power differences between different component carriers. Even if the base station transmits data through the same transmitting beam, and the user device uses the same receiving beam to receive data, there may still be significant power differences even on adjacent serving cells.

The embodiment of the present disclosure further proposes a method for detecting channel status information, which is used in a base station of a wireless communication system. The method includes sending at least one first reference signal corresponding to a first serving 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 a candidate reference signal is obtained as a result of the channel measurement of the first reference signal, the candidate reference signal is received; and the channel status information corresponding to the candidate reference signal is received.

The embodiment of the present disclosure further provides a communication device for reporting channel status information. The communication device includes a transceiver unit and a processor. The transceiver unit is used for receiving at least one first reference signal corresponding to a first serving cell. The processor is electrically connected to the transceiver unit to perform channel measurement on each of the at least one first reference signal, and obtain a candidate reference based on the result of the channel measurement of the at least one first reference signal Signal. Wherein, the processor is further used for reporting channel status information corresponding to the candidate reference signal through the transceiver unit.

The embodiment of the present disclosure further provides a base station for detecting channel status information. The base station includes a transceiver unit and a processor. The transceiver unit is used for sending at least one first reference signal corresponding to a first serving cell. The processor is electrically connected to the transceiver unit for performing 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 reference signal After a candidate reference signal is obtained as a result of channel measurement of a reference signal, the candidate reference signal is received. The processor is further used for receiving channel status information corresponding to the candidate reference signal through the transceiver unit.

With the channel state information reporting method and detection method, and its communication device and base station of the above-mentioned embodiment of the present disclosure, the carrier aggregation technology can be used to simultaneously use multiple service cells to increase the data transmission rate, and can be targeted The transmission of burst data provides sufficient frequency resources to improve transmission efficiency.

To sum up, although the present invention has been disclosed as above by embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to those defined by the attached patent scope.

602, 604, 606, 608: process steps

Claims (44)

A method for reporting channel status 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 serving cell; One performs channel measurement; obtains a candidate reference signal according to the result of the channel measurement of the at least one first reference signal; and reports a channel state information corresponding to the candidate reference signal; wherein, the wireless communication system A first spatial domain receiving filter of the communication device is used for receiving a second reference signal of a second serving cell, and the candidate reference signal is related to the first spatial domain receiving filter. The method described in item 1 of the scope of the patent application further includes: receiving 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. For the method described in claim 2, wherein the reference signal configuration for reference corresponds to the second serving cell, and the communication device has at least one spatial domain receiving filter for the at least one first In the step of performing channel measurement for each of the reference signals, at least part of the at least one spatial domain receiving filter that can be received simultaneously with the second serving cell is selected, or a reference signal that can be used with the reference is selected At least a part of the at least one spatial domain receiving filter received at the same time is configured to perform channel measurement. The method described in item 1 of the scope of patent application includes: At least one serving cell identification code is received, and the at least one first reference signal is related to the at least one serving cell identification code. The method according to claim 4, wherein the at least one serving cell identification code corresponds to the second serving cell, and the communication device has at least one spatial domain receiving filter for the at least one first In the step of performing channel measurement for each of the reference signals, at least part of the at least one spatial domain receiving filter that can receive simultaneously with the second serving cell is selected. The method described in item 1 of the scope of patent application, wherein the first service cell and the second service cell correspond to a first transceiver node or a second transceiver node. The method according to claim 1, 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 receiving filter And at least one second spatial domain receiving filter, the second antenna plate is used to generate at least one third spatial domain receiving filter, and obtaining the result of channel measurement according to 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, the reference signal received by the at least one second spatial domain receiving filter is not selected as the candidate reference signal, or is not reported Use the channel state information of the reference signal received by the at least one second spatial domain receiving filter. Such as the method described in claim 1, wherein the communication device can simultaneously use the candidate reference signal and the second reference signal to operate on the first serving cell and the second serving cell and the base station. To communicate. For example, the method described in claim 1 further includes: reporting a flag, the flag being used to indicate whether the candidate reference signal is related to the first spatial domain receiving filter. The method described in item 1 of the scope of the patent application further includes: reporting a parameter, which is used to indicate the index value or code of the second serving cell related to the first spatial domain receiving filter. The method according to claim 1, wherein the first service cell line is a secondary service cell and the second service cell is a main 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 status information is used in a base station of a wireless communication system. The method includes: sending at least one first reference signal corresponding to a first serving cell; and a communication device in the wireless communication system After performing channel measurement on each of the at least one first reference signal, and after obtaining a candidate reference signal according to the result of the channel measurement of the at least one first reference signal, receiving the candidate reference signal; and receiving the corresponding reference signal Channel state information of a candidate reference signal; 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 signal is the same as The first spatial domain receive filter is correlated. The method described in item 12 of the scope of patent application includes: At least one reference signal configuration for reference is issued, and the at least one first reference signal is related to the reference signal configuration for reference. For the method described in claim 13, wherein the reference signal configuration for reference corresponds to the second serving cell, and the communication device has at least one spatial domain receiving filter for the at least one first In the step of performing channel measurement for each of the reference signals, at least part of the at least one spatial domain receiving filter that can be received simultaneously with the second serving cell is selected, or a reference signal that can be used with the reference is selected At least a part of the at least one spatial domain receiving filter received at the same time is configured to perform channel measurement. The method described in item 12 of the scope of patent application further includes: sending 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 claim 15, wherein the at least one serving cell identification code corresponds to the second serving cell, and the communication device has at least one spatial domain receiving filter for the at least one first In the step of performing channel measurement for each of the reference signals, at least part of the at least one spatial domain receiving filter that can receive simultaneously with the second serving cell is selected. The method according to claim 12, wherein the first service cell and the second service cell correspond to a first transceiver node or a second transceiver node. The method described in claim 12, 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 receiving filter and at least one second spatial domain receiving filter, and the second antenna plate is used to generate at least one third spatial domain receiving filter when receiving the candidate reference signal In the step and the step of receiving the channel state information corresponding to the candidate reference signal, the reference signal received by the at least one second spatial domain receiving filter is not selected as the candidate reference signal, or the at least one reference signal is not reported to be used Channel state information of the reference signal received by the second spatial domain receive filter. The method described in claim 12, wherein the base station can simultaneously use the candidate reference signal and the second reference signal to communicate with the first service cell and the second service cell respectively The device communicates. For example, the method described in claim 12 further includes: receiving a flag, the flag being used to indicate whether the candidate reference signal is related to the first spatial domain receiving filter. For example, the method described in item 12 of the scope of patent application further includes: receiving a parameter for indicating the index value or code of the second service cell related to the first spatial domain receiving filter. The method according to claim 12, wherein the first service cell line is a secondary service cell and the second service cell is a main 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 communication device for reporting channel status information includes: a transceiver unit for receiving at least one first reference signal corresponding to a first serving cell; and A processor is electrically connected to the transceiver unit for performing channel measurement on each of the at least one first reference signal, and obtains a channel measurement result based on the channel measurement result of the at least one first reference signal Candidate reference signal; wherein, the processor is further used to report channel status information corresponding to the candidate reference signal through the transceiver unit; 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, the candidate reference signal is related to the first spatial domain receiving filter. For example, in the communication device described in claim 23, 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. For example, in the communication device described in claim 24, the reference signal configuration for reference corresponds to the second service cell, and the communication device has at least one spatial domain receiving filter for the at least one second service cell. When performing channel measurement for each of a reference signal, select at least a part of the at least one spatial domain receiving filter that can be received simultaneously with the second serving cell, or select a reference signal configuration that can be used with the reference At least part of the at least one spatial domain receiving filter received at the same time performs channel measurement. The communication device according to claim 23, wherein the transceiver unit is further configured to receive at least one service cell identification code, and the at least one first reference signal is related to the at least one service cell identification code. For example, the communication device of claim 26, wherein the at least one service cell identification code corresponds to the second service cell, and the communication device has at least one spatial domain receiving filter for the at least one second service cell. When performing channel measurement for each of a reference signal, at least a portion of the at least one spatial domain receiving filter that can receive simultaneously with the second serving cell is selected. According to the communication device described in item 23 of the scope of patent application, wherein the first service cell and the second service cell correspond to a first transceiver node or a second transceiver node. The communication device described in claim 23, 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 one second spatial domain receiving filter, and the second antenna plate is used to generate at least one third spatial domain receiving filter, which 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, it does not choose to use the reference signal received by the at least one second spatial domain receiving filter as the reference signal Candidate reference signal, or not report the channel state information of the reference signal received by the at least one second spatial domain receiving filter. For example, the communication device described in claim 23, wherein the communication device can simultaneously use the candidate reference signal and the second reference signal, respectively, on the first serving cell and on the second serving cell. The base station communicates. For example, in the communication device described in claim 23, the processor is further used 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器related. For the communication device described in claim 23, wherein the processor is further used to report a parameter through the transceiver unit, and the parameter is used to indicate the second service related to the first spatial domain receiving filter The index value or code of the cell. The communication device according to item 23 of the scope of patent application, wherein the first service cell line is a secondary service cell and the second service cell is a main 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 one first reference signal corresponding to a first serving cell; a processor electrically connected to the transceiver unit for Through the transceiver unit, a communication device in a wireless communication system performs channel measurement on each of the at least one first reference signal, and obtains a candidate based on the 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 used for receiving through the transceiver unit a channel state information corresponding to the candidate reference signal; wherein a first spatial domain receiving filter of the communication device is used To receive a second reference signal of a second serving cell, the candidate reference signal is related to the first spatial domain receiving filter. For example, the base station described in claim 34, wherein the processor is further configured to send at least one reference signal configuration for reference through the transceiver unit, and the at least one first reference signal is the same as the reference signal for reference Configuration related. For example, the base station described in item 35 of the scope of patent application, wherein the reference signal configuration for reference corresponds to the second service cell, the communication device has at least one spatial domain receiving filter, and the communication device responds to the When performing channel measurement for each of at least one first reference signal, at least a part of the at least one spatial domain receiving filter that can be received simultaneously with the second serving cell is selected, or a filter that can be used with the reference is selected At least part of the at least one spatial domain receiving filter received at the same time is configured with reference to the signal to perform channel measurement. For example, the base station described in claim 34, wherein the processor is further used to send at least one service cell identification code through the transceiver unit, and the at least one first reference signal is related to the at least one service cell identification code . For example, the base station according to item 37 of the scope of patent application, wherein the at least one serving cell identification code corresponds to the second serving cell, the communication device has at least one spatial domain receiving filter, and the communication device When performing channel measurement for each of at least one first reference signal, at least a part of the at least one spatial domain receiving filter that can receive simultaneously with the second serving cell is selected. The base station according to item 34 of the scope of patent application, wherein the first service cell and the second service cell correspond to a first transceiver node or a second transceiver node. The base station according to the 34th 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 one second spatial domain receiving filter, the second antenna plate is used to generate at least one third spatial domain receiving filter, when the communication device measures the signal according to the channel of the at least one first reference signal When the candidate reference signal is obtained as a result, 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 receiving filter is not selected as the candidate reference signal , Or not report the channel state information of the reference signal received by the at least one second spatial domain receive filter. For example, the base station described in item 34 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, respectively, on the first serving cell and on the second serving cell and on the The communication device communicates. For example, the base station described in claim 34, 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 receiving filter . For the base station described in item 34 of the scope of patent application, the processor further receives a parameter through the transceiver unit, and the parameter is used to indicate the index value of the second serving cell related to the first spatial domain receiving filter Or code. The base station described in item 34 of the scope of patent application, wherein the first service cell line is a secondary service cell and the second service cell is a main 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.

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