JP6962349B2 - Reference signal resource configuration method, equipment and communication system - Google Patents

Description

The embodiments of the present invention relate to the field of communication technology, in particular, resource configuration methods, devices and communications of reference signals in a three-dimensional (3D) multi-input multi-output (MIMO) system. Regarding the system.

With the development of antenna technology, a large number of antennas can be installed at the transmitting end. Three-dimensional beamforming technology with multiple antennas improves antenna gain and flexibly configures beam width and direction based on the distribution of user equipment (UE, User Equipment), white noise and It is a popular candidate technology for future mobile communication systems because it can effectively suppress random interference between cells and improve the efficiency and reliability of system transmission.

In order to conveniently find and measure the user device, it is necessary to indicate with the corresponding reference signal (RS, Reference Signal). Among them, channel state information reference signal (CSI-RS, Channel State Information Reference Signal), common reference signal (CRS, Common)
Reference Signal), demodulation reference signal (DMRS, De-Modulation Reference Signal) and the like may be included.

Taking CSI-RS as an example, CSI-RS is defined in the LTE R10 system to be transmitted according to the period and fixed offset configured by the system. The base station can notify the specific resource configuration and subframe configuration to be adopted by the upper layer signaling CSI-RS-Config. According to the provisions of the conventional standard, once the base station configures the CSI-RS resource by the upper layer signaling, the base station corresponds to the corresponding cycle unless the CSI-RS resource is released again by the upper layer signaling. And the CSI-RS can be transmitted all the time according to the position.

It should be noted that the above-mentioned introduction of the background technology is for the purpose of clearly and completely explaining the technical proposal of the present invention and making it easy for those skilled in the art to understand it. These proposals are described as part of the background art of the present invention and should not be construed as well known to those skilled in the art.

However, the inventor of the present invention has discovered the following. That is, a 3D MIMO system usually requires a plurality of different types of reference signals in order to better serve the user equipment. However, the current 3D MIMO technology is in the early stages of research, and it is compatible with how to specifically define different types of reference signals and how to define multiple types of reference signals in the future. I haven't considered how to do it yet.

An embodiment of the present invention provides a resource configuration method, an apparatus, and a communication system for a reference signal. They are used because 3D MIMO systems can flexibly support multiple types of reference signals.

According to the first aspect of the embodiments of the present invention, a method of resource configuration of a reference signal is provided, which is applied to a base station of a 3D MIMO system, said method.
The user that the base station constitutes a resource for the first reference signal precoded by the beam weighting coefficient and is not or precoded by the beam weighting coefficient. It comprises configuring resources for a second reference signal unknown to the device; and the base station transmitting the resource configuration of the first reference signal and the resource configuration of the second reference signal to the user device.

According to the second aspect of the embodiment of the present invention, a resource configuration device for a reference signal is provided, which is configured in a base station of a 3D MIMO system.
The resource configuration unit that configures the resource for the first reference signal that is precoded by the beam weighting factor and that the user equipment is not or precoded by the beam weighting factor. For configuring resources for an unknown second reference signal; and for transmitting the configuration transmission unit to transmit the resource configuration of the first reference signal and the resource configuration of the second reference signal to a user apparatus. Including those.

According to the third aspect of the embodiment of the present invention, a method of resource configuration of a reference signal is provided, which is applied to a user apparatus of a 3D MIMO system, said method.
The user equipment is that the resource configuration of the first reference signal transmitted by the base station and is precoded by the beam weighting coefficient, and that the user equipment is not or is precoded by the beam weighting coefficient. Includes receiving the resource configuration of a second reference signal unknown to.

According to the fourth aspect of the embodiment of the present invention, a resource configuration device for a reference signal is provided, which is configured as a user device of a 3D MIMO system, said device.
Configuration The receiving unit has the resource configuration of the first reference signal transmitted by the base station, which is precoded by the beam weighting factor, and is not or precoded by the beam weighting factor. It includes a device for receiving a resource configuration of a second reference signal unknown to the user apparatus.

According to a fifth aspect of an embodiment of the present invention, a communication system is provided, the communication system including a base station and a user device.
The base station constitutes a resource for a first reference signal that is precoded by a beam weighting factor, and the user equipment knows that it is not or is precoded by a beam weighting factor. Configure resources for a second reference signal that is not; and transmit the resource configuration of the first reference signal and the resource configuration of the second reference signal.
The user device receives the resource configuration of the first reference signal and the resource configuration of the second reference signal.

According to another aspect of the embodiments of the present invention, a computer-readable program is provided, of which when the program is executed in a base station, the program is referred to the computer as described above in the base station. Execute the signal resource configuration method.

According to another aspect of the embodiment of the present invention, a storage medium for storing a computer-readable program is provided, in which the computer-readable program gives the computer a resource configuration of a reference signal as described above in a base station. Let the method run.

According to another aspect of the embodiments of the present invention, a computer-readable program is provided, of which when the program is executed in the user device, the program is sent to the computer as described above in the user device. Execute the resource configuration method of the reference signal.

According to another aspect of the embodiment of the present invention, a storage medium for storing a computer-readable program is provided, in which the computer-readable program gives the computer a resource configuration of a reference signal as described above in a user apparatus. Let the method run.

The beneficial effects of the examples of the present invention are as follows. That is, the user equipment knows that the base station constitutes a resource for the first reference signal that is precoded by the beam weighting factor and is not or precoded by the beam weighting factor. By configuring resources for a second reference signal that is not available, a 3D MIMO system can flexibly support multiple types of reference signals.

By referring to the description and drawings described below, a specific embodiment of the present invention will be disclosed in detail, and an embodiment in which the principle of the present invention can be adopted will be shown. The embodiments of the present invention are not limited thereto within the scope. Within the scope of the appended claims, embodiments of the present invention may include various modifications, modifications and alternatives.

Also, the features described and / or shown for one embodiment may be used in one or more other embodiments in the same or similar manner and combined with or in combination with features in other embodiments. It is also possible to replace the features in the morphology.

Note that terms such as "contain / have", as used herein, refer to the presence of a feature, element, step, or assemble, but one or more other features, elements, steps. Or, it also refers to not excluding the existence or addition of an assembly.

Many aspects of the invention can be better understood by reference to the drawings below. The elements in the drawings are not drawn proportionally, but merely for showing the principle of the present invention. In order to conveniently explain and illustrate a part of the present invention, the corresponding part in the drawings may be enlarged or reduced.

In addition, the elements and features described in one drawing or embodiment of the present invention can be combined with the elements and features shown in one or more other drawings or embodiments. Further, in the drawings, similar reference numerals may be used to indicate the corresponding elements in some drawings and also to indicate the corresponding elements used in a plurality of embodiments.
It is a figure which shows the resource composition method in Example 1 of this invention. It is a figure which shows that different UEs are covered by a plurality of CSI-RSs in Example 1 of this invention. It is another figure which shows the resource composition method in Example 1 of this invention. It is another figure which shows the resource composition method in Example 1 of this invention. It is a figure which shows the resource composition method in Example 2 of this invention. It is another figure which shows the resource composition method in Example 2 of this invention. It is another figure which shows the resource composition method in Example 2 of this invention. It is a figure which shows the resource composition apparatus in Example 3 of this invention. It is a figure which shows the structure of the base station in Example 3 of this invention. It is a figure which shows the resource composition apparatus in Example 4 of this invention. It is a figure which shows the structure of the user apparatus in Example 4 of this invention. It is a figure which shows the structure of the communication system in Example 5 of this invention.

The aforementioned and other features of the present invention will become apparent by reference to the accompanying drawings and the following description. Although the specification and drawings specifically disclose specific embodiments of the present invention, they are only partial embodiments in which the principles of the invention can be adopted. It should be understood that the invention is not limited to the embodiments described, i.e., the invention includes all modifications, modifications and alternatives that fall within the appended claims.

In a 3D MIMO system, the beam can change with the position of the user equipment in order to better serve the user equipment. A beam with a very narrow beam width may be used to suit the user equipment at different positions, but the beam cannot completely cover all the user equipment in the cell. Also, the beam width is very wide, and thus a full-angle beam may be used, which can completely cover all user devices in the cell.

Whether it is a narrow beam or a wide beam, it is necessary to indicate with a corresponding reference signal for convenient discovery and measurement of the user device. Hereinafter, in the examples, CSI-RS will be described as an example, but the present invention is not limited to this, and may be, for example, another reference signal.

The embodiments of the present invention provide a resource configuration method for a reference signal, which is applied to a base station of a 3D MIMO system. FIG. 1 is a diagram showing a resource configuration method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps.

Step 101: The user apparatus that the base station configures a resource for a first reference signal that is precoded by a beam weighting factor and is not or precoded by a beam weighting factor. Configure resources for a second reference signal unknown to
Step 102: The base station transmits the resource configuration of the first reference signal and the resource configuration of the second reference signal to the user apparatus.

In this embodiment, for narrow beams, the system may use a first reference signal precoded by a beam weighting factor (eg, beamformed CSI-RS), of which the UE is the first. I know that the reference signal is precoded. For wide beams, the system may use a second reference signal (eg, non-precoded CSI-RS) that is not precoded by the beam weighting factor. The system may also use a second reference signal that the UE does not know (or does not need to know) to be precoded. That is, the second reference signal may be a reference signal that is not completely precoded, or may be a reference signal that is precoded but the UE does not know that it is precoded.

Among them, the first reference signal may have one or more, and the second reference signal may also have one or more. Hereinafter, the second reference signal will be described using only the non-precoded CSI-RS as an example.

FIG. 2 is a diagram showing that different UEs are covered by a plurality of CSI-RSs in the embodiment of the present invention. As shown in FIG. 2, UE1 can receive the signal transmitted by the first reference signal 1 (beamformed CSI-RS1) and is also transmitted by the first reference signal 2 (beamformed CSI-RS2). It is also possible to receive some of the signals that have been received. Therefore, UE1 can measure two CSI-RSs and select one CSI-RS with the best channel quality. However, since UE2 is far from the beam directions of the two narrow beams, CSI-RS1 and CSI-RS2, it needs to be covered only by other reference signals. For example, a base station can help the UE2 measure a channel by transmitting a second reference signal (non-precoded CSI-RS).

Due to the configuration of the two types of CSI-RS (that is, beamformed CSI-RS and non-precoded CSI-RS) shown in FIG. 2, user devices at different positions can both be covered by signals from the base station. The user device may feed back appropriate channel quality information, such as precoding matrix indicator (PMI, Precoding Matrix Indicator), channel quality indicator (CQI, Channel Quality) or rank indicator (RI, Rank Indicator). can. Further, the two types of CSI-RS can be distinguished by parameters such as resource (time domain resource and / or frequency resource) position, period, and port.

In this embodiment, the correspondence table between the CSI-RS type and the parameters such as time frequency resource, period, and port may be defined in advance, whereby the UE receives the corresponding CSI-RS. , The corresponding measurement can be made. For beamformed CSI-RS, further beam information (eg, Beam index, or other parameter indicating Beam) may be associated with parameters such as time-frequency resource, period, port. The parameters are not limited to this, and specific parameters may be determined according to the actual scenario.

For example, the UE can determine whether it has received a beamformed CSI-RS or a non-precoded CSI-RS based on the detected CSI-RS port information. If Beamformed CSI-RS is confirmed, the order number of the corresponding beam can also be obtained. However, the present invention is not limited to this, and it is also possible to determine which type of CSI-RS is by one or any combination of parameters such as time frequency resource, period, and port.

In this embodiment, the correspondence table between the CSI-RS type and the parameters such as time frequency resource, period, and port may be statically promised between the base station and the UE in advance, or from the base station. These corresponding information may be adjusted dynamically or semi-dynamically by being configured by upper layer signaling.

In this embodiment, the first reference signal is triggered or activated so that the user apparatus reports the measurement result of the first reference signal by signaling after transmitting the resource configuration of the first reference signal. At the same time (or by advancing a predetermined amount (time)), the first reference signal can be transmitted. Regarding the second reference signal, the second reference signal can be transmitted when the resource configuration of the second reference signal is transmitted.

That is, the base station configures and transmits a plurality of types of non-zero power CSI-RS. Of these, one type of CSI-RS can be configured and transmitted at the same time, this type of CSI-RS is a non-precoded CSI-RS, and all UEs within the base station coverage perform channel measurements. Used to do; other types of CSI-RS are configured and transmitted, respectively, the transmission of the CSI-RS is triggered or activated by signaling, and this type of CSI-RS is beamformed CSI-RS. And some UEs are used to make channel measurements.

For example, for non-precoded CSI-RS, configuration and transmission are performed at the same time. On the other hand, considering that the beamformed CSI-RS can be configured relatively flexibly, the process of transmitting the beamformed CSI-RS by the base station may be divided into two steps as follows, that is, the first step. Configures the CSI-RS resource, and the second step sends the CSI-RS. For Beamformed CSI-RS, after configuring CSI-RS resources, it is activated by media access control layer (MAC, Media Access Control) signaling, or by downlink control information (DCI, Downlink Control Information) in physical layer signaling PDCCH. By waiting for the trigger and thereby transmitting the beamformed CSI-RS at a predetermined time, it can be guaranteed that the UE can detect the beamformed CSI-RS when it receives the trigger or activation signaling.

In one embodiment, the non-precoded CSI-RS is a reference signal configured by the base station to transmit periodically, of which the resource position and period of the reference signal are configured by higher layer signaling, eg, It consists of radio resource control (RRC) signaling. Beamformed CSI-RS is a reference signal that is periodically configured and triggered (or activated) by a base station, of which the resource position, period and / or duration of the reference signal is the upper layer signaling ( For example, it is composed of RRC signaling), and MAC layer signaling notifies the UE of the trigger or activation of the measurement report for the beamformed CSI-RS.

In another embodiment, the non-precoded CSI-RS is a reference signal configured by the base station to be transmitted periodically, of which the resource position and period of the reference signal are determined by upper layer signaling (eg, RRC signaling). It is composed. Beamformed CSI-RS is a reference signal that is periodically configured and triggered (or activated) by a base station, of which the resource position, period and / or duration of the reference signal is the upper layer signaling ( For example, it is composed of RRC signaling, and physical layer signaling, for example, Physical Downlink Control Channel (PDCCH), triggers or activates a measurement report for the beamformed CSI-RS to the UE. Notice.

In another embodiment, the non-precoded CSI-RS is a reference signal configured by the base station to be transmitted periodically, of which the resource position and period of the reference signal are higher layer signaling (eg, RRC signaling). ). Beamformed CSI-RS is a reference signal that is configured and triggered (or activated) by a base station and transmitted aperiodically, of which the resource position, the number of transmissions, and / or the duration of the reference signal are in the upper layer. It is composed of signaling (eg, RRC signaling), and MAC layer signaling notifies the UE of the trigger or activation of the measurement report for the beamformed CSI-RS.

In another embodiment, the non-precoded CSI-RS is a reference signal configured by the base station to be transmitted periodically, of which the resource position and period of the reference signal are higher layer signaling (eg, RRC signaling). ). Beamformed CSI-RS is a reference signal configured and triggered (or activated) by a base station to transmit aperiodically, of which the resource position, transmission count and / or duration of the reference signal is the upper layer signaling. It is configured by (eg, RRC signaling) and the physical layer signaling (eg, PDCCH) notifies the UE of the trigger or activation of the measurement report for the beamformed CSI-RS.

In this embodiment, after configuring the CSI-RS, the base station may further notify the UE to provide feedback on periodic or aperiodic channel measurements, depending on needs.

In one embodiment, MAC layer signaling is used to give the UE periodic or aperiodic feedback to the first reference signal when the UE triggers or activates to report the measurement result of the first reference signal. Notify you to do. Further, the upper layer signaling notifies the UE that periodic feedback is performed on the second reference signal, or the physical layer signaling is used to notify the UE that periodic feedback is performed on the second reference signal. Notify that.

For example, for beamformed CSI-RS, the base station transmits beamformed CSI-RS (or may be advanced by a predetermined time), and at the same time, the UE reports the measurement result of beamformed CSI-RS by MAC layer signaling. You may activate to do so and also notify the UE to provide periodic or aperiodic CQI feedback.

For non-precoded CSI-RS, the base station triggers periodic CQI feedback by higher layer signaling (which may also include one or more PMIs, one or more RIs, etc.) or physical. Layer signaling (eg, PDCCH) triggers aperiodic feedback.

In another embodiment, physical layer signaling triggers or activates the UE to report the measurement result of the first reference signal, causing the UE to provide periodic feedback or aperiodic feedback to the first reference signal. Notify you to give feedback. In addition, the upper layer signaling notifies the UE to provide periodic feedback to the second reference signal, or the physical layer signaling notifies the UE to provide aperiodic feedback to the second reference signal. Notify.

For example, for non-precoded CSI-RS, the base station may trigger periodic CQI feedback (which may further include one or more PMIs, one or more RIs, etc.) by higher layer signaling, or , Trigger aperiodic feedback by physical layer signaling (eg, PDCCH).

Regarding Beamformed CSI-RS, when the base station transmits beamformed CSI-RS (or may be advanced by a predetermined time), the UE measures beamformed CSI-RS by physical layer signaling (for example, PDCCH). At the same time as triggering to report the result, the UE may be notified to provide periodic or aperiodic CQI feedback.

FIG. 3 is another diagram showing the resource configuration method in the embodiment of the present invention, and illustrates the case of the first reference signal. As shown in FIG. 3, the method includes the following steps.

Step 301: The base station configures a resource for the first reference signal precoded by the beam weighting factor;
Step 302: The base station transmits the resource configuration of the first reference signal by higher layer signaling;
Step 303: The base station sends an instruction by MAC layer signaling or physical layer signaling to trigger or activate the user apparatus to report the measurement result of the first reference signal, and at the same time (or advance). (In advance) Send the first reference signal;
Step 304: The user device detects and measures the first reference signal;
Step 305: The user device provides periodic or aperiodic feedback to the first reference signal.

FIG. 4 is another diagram showing the resource configuration method in the embodiment of the present invention, and illustrates the case of the second reference signal. As shown in FIG. 4, the method includes the following steps.

Step 401: The base station configures a resource for a second reference signal that is not precoded by the beam weighting factor;
Among them, the second reference signal may be a signal that is not precoded by the beam weighting coefficient, or may be a signal that is precoded by the beam weighting coefficient (but the UE does not know that). ..

Step 402: The base station transmits the resource configuration of the second reference signal and also transmits the second reference signal by higher layer signaling;
Step 403: The base station sends an instruction to trigger or activate the user apparatus to report the measurement result of the second reference signal by upper layer signaling or physical layer signaling;
Step 404: The user device detects and measures the second reference signal;
Step 405: The user device provides periodic or aperiodic feedback to the second reference signal.

Note that FIGS. 3 and 4 illustrate the cases of the first reference signal and the second reference signal, respectively, but the present invention is not limited thereto. For example, the order before and after the steps can be further adjusted, or one or more of the steps can be increased or decreased.

As can be seen from the above embodiment, the base station constitutes a resource for the first reference signal that is precoded by the beam weighting factor and is not or precoded by the beam weighting factor. By configuring resources for a second reference signal that is unknown to the user equipment, the 3D MIMO system can flexibly support multiple types of reference signals.

The embodiments of the present invention provide a resource configuration method for a reference signal, which is applied to a user apparatus of a 3D MIMO system. In the examples of the present invention, the same contents as in the first embodiment are omitted.

FIG. 5 is a diagram showing a resource configuration method for a reference signal according to an embodiment of the present invention. As shown in FIG. 5, the method includes the following steps.

Step 501: The resource configuration of the first reference signal transmitted by the base station, which is precoded by the beam weighting factor, and that the user equipment is not or is precoded by the beam weighting factor. The resource configuration of the second reference signal unknown to the user apparatus is received.

Hereinafter, the first reference signal and the second reference signal will be described respectively.

FIG. 6 is another diagram showing the resource configuration method in the embodiment of the present invention, and illustrates the case of the first reference signal. As shown in FIG. 6, the method includes the following steps.

Step 601: The user equipment receives the resource configuration of the first reference signal precoded by the beam weighting factor transmitted by the base station;
Step 602: The user apparatus receives a command transmitted from the base station by MAC layer signaling or physical layer signaling to trigger or activate the user apparatus to report the measurement result of the first reference signal;
Step 603: The user device makes a channel measurement on the first reference signal;
Step 604: The user device provides periodic or aperiodic feedback to the first reference signal.

For example, after detecting a beamformed CSI-RS, the UE selects the CSI-RS of this type (eg, a CSI-RS with one or more different beam directions) that has the best channel conditions. You may give feedback. The content of the feedback may include a beam index corresponding to one or more CSI-RSs, or other parameters indicating the beam (eg, port, resource, etc.), and corresponding CQI, RI information.

FIG. 7 is another diagram showing the resource configuration method in the embodiment of the present invention, and illustrates the case of the second reference signal. As shown in FIG. 6, the method includes the following steps.

Step 701: The user equipment receives the resource configuration of the second reference signal transmitted by the base station;
Among them, the second reference signal may be a signal that is not precoded by the beam weighting coefficient, or may be a signal that is precoded by the beam weighting coefficient (but the UE does not know that). ..

Step 702: The user equipment receives an instruction transmitted from the base station by higher layer or physical layer signaling to trigger or activate the user equipment to report the measurement result of the second reference signal;
Step 703: The user device makes a channel measurement on the second reference signal;
Step 704: The user device provides periodic or aperiodic feedback to the second reference signal.

For example, after detecting non-precoded CSI-RS, the UE can estimate the PMI requiring feedback according to the precoding structure of W = W1W2 when making measurements based on the CSI-RS. Among them, W1 and W2 indicate different PMIs, for example, vertical dimension and horizontal dimension, the values of which are from a predefined codebook, respectively, and W is assumed by the UE end. , The precoding matrix used when the base station performs data transmission is shown. After making the PMI estimation, the UE can calculate the corresponding CQI and / or RI information and then provide the necessary channel feedback.

Note that FIGS. 5 to 7 show only operations on the user device side, but the present invention is not limited to this, and for example, the order before and after the step is further adjusted, or one of them. Alternatively, multiple steps can be increased or decreased. It also does not show other steps for base stations.

In this embodiment, the feedback to the UE's first and / or second reference signals may have different priorities.

In one embodiment, the user device may provide feedback in the following order of priority, i.e., aperiodic feedback to the first reference signal, periodic to the first reference signal. Feedback, aperiodic feedback to the second reference signal, and periodic feedback to the second reference signal.

For example, the two types of CSI-RS are supported on the corresponding uplink feedback channel, for example, the physical uplink control channel (PUCCH, Physical Uplink Control Channel) or the physical uplink shared channel (PUSCH, Physical Uplink Shared Channel). When CQI feedback collides, the following priorities (higher to lower priority), that is,
Aperiodic, CQI report based on beamformed CSI-RS measurements;
Periodic CQI reporting based on beamformed CSI-RS measurements;
CQI transmission may be performed in the order of aperiodic, non-precoded CQI-RS measurement-based CQI reporting; and periodic, non-precoded CQI-RS measurement-based CQI reporting. The user device may provide feedback in the following order of priority, that is, aperiodic feedback to the first reference signal, aperiodic feedback to the second reference signal, the first. It is a periodic feedback for one reference signal and a periodic feedback for the second reference signal.

For example, when the CQI feedbacks corresponding to these two types of CSI-RS collide on the corresponding uplink feedback channel (for example, PUCCH or PUSCH), the following priorities (from high priority to low priority) are as follows. Rank), that is,
Aperiodic, CQI report based on beamformed CSI-RS measurements;
CQI reporting based on aperiodic, non-precoded CQI-RS measurements;
CQI transmission may be performed in the order of periodic, beamformed CSI-RS measurement based CQI report; and periodic, non-precoded CQI-RS measurement based CQI report.

In this embodiment, by separating the resource configuration of CSI-RS and the actual transmission of CSI-RS, the system is a first-class CSI-RS (beamformed CSI-RS) and a second-class CSI-RS (non). -precoded CSI-RS) can be made to support transmission. The base station simultaneously configures and transmits a second-class CSI-RS to cover a large area, and the base station configures the first-class CSI-RS resources and of the system. It flexibly activates the transmission of the CSI-RS by signaling according to the needs. At the receiving end, the UE performs CQI measurement and feedback according to signaling, and when multiple CQI feedback reports collide, provides CQI feedback according to a predetermined priority. This allows flexible support for multiple beamwidth reference signals and corresponding CQI feedback.

An embodiment of the present invention provides a resource configuration device for a reference signal, which is configured in a base station of a 3D MIMO system. In the examples of the present invention, the same contents as in the first embodiment are omitted.

FIG. 8 is a diagram showing a resource configuration device according to an embodiment of the present invention. As shown in FIG. 8, the resource configuration device 800 includes the following.

Resource Configuration Unit 801: The user equipment knows that the resource is configured for a first reference signal that is precoded by the beam weighting factor and that it is not or is precoded by the beam weighting factor. Configure resources for non-secondary reference signals;
Configuration transmission unit 802: The resource configuration of the first reference signal and the resource configuration of the second reference signal are transmitted to the user apparatus.

In this embodiment, the first reference signal and the second reference signal may be distinguished by one or any combination of the following information, that is, the time frequency resource position, period and port. .. The present invention is not limited to this, and can be distinguished by using other information.

As shown in FIG. 8, the resource configuration device 800 may further include the following, that is, the following.
Signal transmission unit 803: After transmitting the resource configuration of the first reference signal, it is triggered or activated to transmit the first reference signal by signaling; and when transmitting the resource configuration of the second reference signal. The second reference signal is transmitted.

As shown in FIG. 8, the resource configuration device 800 may further include the following, that is, the following.
Signaling transmission unit 804: The UE transmits a signaling for triggering or activating to report the measurement result of the first reference signal.

In this embodiment, the configuration transmission unit 802 can transmit the resource configurations of the first reference signal and the second reference signal by upper layer signaling.

In this embodiment, the signal transmission unit 803 can periodically transmit the second reference signal; and the signal transmission unit 803 periodically or aperiodically transmits the first reference signal. can do.

In one embodiment, the signaling transmission unit 804 can be triggered or activated by MAC layer signaling or physical layer signaling so that the UE reports the measurement result of the first reference signal.

In one embodiment, the signaling transmission unit 804 further notifies the UE by higher layer signaling to provide periodic feedback to the second reference signal, or by physical layer signaling to the UE. , May be used to notify that aperiodic feedback is to be performed on the second reference signal.

In one embodiment, the signaling transmission unit 804 further triggers or activates the UE to report the measurement result of the first reference signal by MAC layer signaling to the UE to the first reference signal. Notifying the UE that it will provide periodic or aperiodic feedback; or when physical layer signaling triggers or activates the UE to report the measurement result of the first reference signal, the UE is informed that the first reference signal is given. (1) It may be used to notify the reference signal that periodic feedback or non-periodic feedback is to be given.

An embodiment of the present invention further provides a base station, in which the above-mentioned resource configuration device 800 is configured.

FIG. 9 is a block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 9, the base station 900 includes a central processing unit (CPU) 200 and a storage device 210, and the storage device 210 is connected to the central processing unit 200. Among them, the storage device 210 can store various data; and can further store a program for information processing, and can execute the program under the control of the central processing unit 200. ..

Among them, the base station 900 can realize the resource configuration method of the reference signal described in the first embodiment. The central processor 200 may be configured to implement the functionality of the resource configuration device 800, i.e. the central processor 200 may be configured as follows, i.e. precoded by the beam weighting coefficient. Configure resources for the first reference signal and configure resources for the second reference signal that is not precoded by the beam weighting factor or is not known to the user device to be precoded. The resource configuration of the first reference signal and the resource configuration of the second reference signal are controlled to be transmitted to the user apparatus.

Further, as shown in FIG. 9, the base station 900 may further include a transceiver 220, an antenna 230, and the like, and the functions of these components are similar to those of the prior art. Is omitted. The base station 900 does not necessarily have to include all the parts shown in FIG. In addition, the base station 900 may further include components not shown in FIG. 9, for which prior art can be referred to.

As can be seen from the above embodiment, the base station constitutes a resource for the first reference signal that is precoded by the beam weighting factor and is not or precoded by the beam weighting factor. By configuring resources for a second reference signal that is unknown to the user equipment, the 3D MIMO system can flexibly support multiple types of reference signals.

An embodiment of the present invention provides a resource configuration device for a reference signal, which is configured as a user device for a 3D MIMO system. In the examples of the present invention, the same contents as in the second embodiment are omitted.

FIG. 10 is a diagram showing a resource configuration device according to an embodiment of the present invention. As shown in FIG. 10, the resource configuration device 1000 includes the following.

Configuration Receiving unit 1001: The resource configuration of the first reference signal transmitted by the base station, which is precoded by the beam weighting factor, and the user equipment that is not or is precoded by the beam weighting factor. Receives the resource configuration of the second reference signal unknown to.

As shown in FIG. 10, the resource configuration device 1000 may further include the following.

Signal detection unit 1002: After receiving the resource configuration of the first reference signal, the first reference signal is detected when the signaling for instructing to report the measurement result of the first reference signal is received; Then, when the resource configuration of the second reference signal is received, the second reference signal is detected.

As shown in FIG. 10, the resource configuration device 1000 may further include the following.

Signaling receiving unit 1003: The user device receives a signaling for triggering or activating to report the measurement result of the first reference signal, and the signal detecting unit 1002 receives the signaling and then the first reference. Detect the signal.

As shown in FIG. 10, the resource configuration device 1000 may further include the following.

Measurement unit 1004: Performs channel measurement on the first reference signal and / or the second reference signal;
Feedback unit 1005: Provides periodic or aperiodic feedback to the second reference signal and / or provides periodic or aperiodic feedback to the first reference signal.

In one embodiment, the feedback unit 1005 provides feedback by selecting one or more first reference signals with the best channel conditions for the plurality of first reference signals.

In one embodiment, the feedback unit 1005 feeds back one or any combination of the following information to the second reference signal, i.e., channel quality indication, precoding matrix indication, rank. It is an instruction.

In another embodiment, the feedback unit 1005 feeds back one or any combination of the following information to the first reference signal, i.e., beam information, channel quality indication, precoding. Matrix instruction and rank instruction.

In one embodiment, the feedback unit 1005 provides feedback in the following order of priority: aperiodic feedback to the first reference signal, periodic to the first reference signal. Feedback, aperiodic feedback to the second reference signal, and periodic feedback to the second reference signal.

In another embodiment, the feedback unit 1005 provides feedback in the following order of priority: aperiodic feedback to the first reference signal, non-periodic feedback to the second reference signal. Periodic feedback, periodic feedback for the first reference signal, and periodic feedback for the second reference signal.

An embodiment of the present invention further provides a user device, including the resource configuration device 1000 as described above.

FIG. 11 is a diagram showing a user device according to an embodiment of the present invention. As shown in FIG. 11, the user device 1100 includes a central processing unit 100 and a storage device 140, and the storage device 140 is connected to the central processing unit 100. It should be noted that the figure is merely an example, and a telecommunications function or another function may be realized by supplementing or substituting the structure with a structure of another type.

In one embodiment, the functions of the resource configuration device 1000 can be integrated into the central processing unit 100. Among them, the central processing apparatus 100 may be configured as follows, that is, based on the resource configuration of the first reference signal precoded by the beam weighting coefficient transmitted by the base station and the beam weighting coefficient. Controls to receive the resource configuration of the second reference signal that is not precoded or is not known to the user device to be precoded.

In another embodiment, the resource configuration device 1000 may be configured separately from the central processing unit 100, for example, the resource configuration device 1000 is configured as a chip connected to the central processing unit 100, and the central processing unit is configured. The function of the resource configuration unit 1000 may be realized by controlling 100.

As shown in FIG. 11, the user device 1100 may further include a communication module 110, an input unit 120, a voice processing unit 130, a storage device 140, a camera 150, a display device 160, and a power supply 170. Among them, since the functions of these parts are similar to those of the prior art, detailed description thereof will be omitted here. The user device 1100 does not necessarily have to include all the parts shown in FIG. In addition, the user apparatus 1100 may further include components not shown in FIG. 11, for which prior art can be referred to.

As can be seen from the above embodiments, the user equipment is precoded by the beam weighting factor by the resource configured by the base station for the first reference signal and precoded by the beam weighting factor by the base station. The 3D MIMO system flexibly supports multiple types of reference signals by receiving resources configured for a second reference signal that is not or is not known to the user equipment to be precoded. can do.

The embodiments of the present invention further provide a communication system, wherein the same contents as those of the first to fourth embodiments are omitted. FIG. 12 is a diagram showing a communication system according to an embodiment of the present invention. As shown in FIG. 12, the communication system 1200 includes a base station 1201 and a user device 1202.

Of these, base station 1201 constitutes a resource for the first reference signal precoded by the beam weighting factor, and the user equipment is told that it is not or precoded by the beam weighting factor. Configure resources for an unknown second reference signal; and transmit the resource configuration of the first reference signal and the resource configuration of the second reference signal;
The user device 1202 receives the resource configuration of the first reference signal and the resource configuration of the second reference signal.

In this embodiment, the first reference signal and the second reference signal may be distinguished by one or any combination of the following information, that is, the time frequency resource position, period and port. ..

In this embodiment, the base station, after transmitting the resource configuration of the first reference signal, triggers or activates to transmit the first reference signal by signaling; and the resource of the second reference signal. The second reference signal is transmitted when the configuration is transmitted.

In this embodiment, the base station may further transmit signaling to trigger or activate the user device to report the measurement result of the first reference signal.

An embodiment of the present invention provides a computer-readable program, of which, when the program is executed in the base station, the program tells the computer the resource configuration of the reference signal according to the first embodiment in the base station. Let the method run.

An embodiment of the present invention provides a storage medium in which a computer-readable program is stored, and the computer-readable program causes a computer to execute the reference signal resource configuration method described in the first embodiment in a base station.

An embodiment of the present invention provides a computer-readable program, of which, when the program is executed in the user apparatus, the program tells the computer the resource configuration of the reference signal according to the second embodiment in the user apparatus. Let the method run.

The above-mentioned devices and methods of the present invention may be realized by software or hardware, or may be realized by a combination of hardware and software. The present invention further relates to a computer-readable program such as the following, that is, when the program is executed by a logic component, the logic component is made to realize the above-mentioned device or structural component, or the logic component. , Realize the various methods or steps described above. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, a processor used in a computer, or the like. The present invention further relates to a storage medium that stores the above-mentioned programs, such as a hard disk, a magnetic disk, an optical hard disk, a DVD, and a fresh memory.

One or more combinations of functional blocks and / or one or more combinations of functional blocks described in the drawings are general purpose processors, digital signal processors (DSPs) for performing the functions described in the present application. , Dedicated integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic components, discrete gate or transistor logic components, discrete hardware assemblies or any other suitable combination. .. Further, the combination of one or more of the functional blocks and / or the combination of one or more of the functional blocks described in the drawings further includes a combination of computing devices, for example, a combination of DSP and a microprocessor, and a plurality of micros. It may be configured as one or more microprocessors or any other such configuration connected by communication with a processor, DSP.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and any modification to the present invention belongs to the technical scope of the present invention unless the gist of the present invention is deviated.

Claims (14)

It ’s a base station,
A processor for executing a command to configure a resource configuration that indicates that the first reference signal is precoded for beamforming and that the second reference signal is not precoded. When,
A transmitter for transmitting the resource configuration indicating that the first reference signal is beamformed and that the second reference signal is not precoded to a user apparatus (UE). ,
Including
The transmitter triggers the first reference signal by transmitting an activation MAC (Media Access Control) control element (CE) of a channel state information reference signal (CSI-RS) resource after transmitting the resource configuration. Alternatively, after activating and transmitting the resource configuration, the second reference signal is transmitted .
A base station in which both the first reference signal and the second reference signal are channel state information reference signals (CSI-RS). The base station according to claim 1.
The first reference signal may be one or more.
The second reference signal may be one or more.
The base station, wherein the first reference signal and the second reference signal are distinguished by one or any combination of information such as time frequency resource position, period and port. The base station according to claim 1.
The transmitter is a base station that transmits a signaling for triggering or activating the UE so that the UE reports the measurement result of the first reference signal. The base station according to claim 1.
The transmitter transmits the resource configuration by upper layer signaling.
base station. The base station according to claim 3.
A base station in which the transmitter periodically transmits the second reference signal, and the transmitter transmits the first reference signal periodically or aperiodically. The base station according to claim 5.
The transmitter is a base station that triggers or activates the UE by medium access control layer (MAC layer) signaling or physical layer signaling so that the UE reports the measurement result of the first reference signal. The base station according to claim 3.
The transmitter further
The UE is notified by upper layer signaling that periodic feedback is performed on the second reference signal, or
A base station that notifies the UE of providing aperiodic feedback to the second reference signal by physical layer signaling. The base station according to claim 6.
The transmitter further
When the UE triggers or activates the UE to report the measurement result of the first reference signal by the MAC layer signaling, the UE is given a periodic or aperiodic period with respect to the first reference signal. Notify you that you will give feedback or
When the UE triggers or activates the UE to report the measurement result of the first reference signal by the physical layer signaling, the UE is given a periodic or aperiodic period with respect to the first reference signal. A base station that notifies you of providing targeted feedback. It is a user device (UE)
One or more resource configurations that indicate that the first reference signal transmitted by the base station is precoded for beamforming and that the second reference signal is not precoded. And a receiver for receiving
The first reference signal is detected when the command is executed, the one or more resource configurations are received, and then the signaling for instructing to report the measurement result of the first reference signal is received. Also, a processor for detecting the second reference signal after receiving the one or more resource configurations.
Only including,
A user apparatus in which both the first reference signal and the second reference signal are channel state information reference signals (CSI-RS). The user device according to claim 9.
The receiver receives signaling to trigger or activate the user device so that the user device reports the measurement result of the first reference signal.
A user apparatus in which the processor executes the command, receives the signaling, and then detects the first reference signal again. The user device according to claim 9.
The processor further executes the command,
Channel measurements are made to the first reference signal and / or the second reference signal, and periodic or aperiodic feedback is given to the second reference signal, and / or to the first reference signal. A user device that provides periodic or aperiodic feedback to a device. The user device according to claim 11.
With respect to the plurality of first reference signals, the processor further executes the command to select one or more first reference signals having the best channel conditions from the plurality of first reference signals and provide feedback. To do, user equipment. The user device according to claim 11.
With respect to the second reference signal, the processor further executes the instructions to feed back one or any combination of information such as channel quality indication, precoding matrix indication and rank indication, and said first. With respect to the reference signal, the processor further executes the instructions to feed back one or any combination of information such as beam information, channel quality indication, precoding matrix indication and rank indication. The user device according to claim 11.
The processor further executes the command,
Aperiodic feedback to the first reference signal, periodic feedback to the first reference signal, aperiodic feedback to the second reference signal, and to the second reference signal. The priority of periodic feedback, or aperiodic feedback for the first reference signal, aperiodic feedback for the second reference signal, periodic feedback for the first reference signal, And a user device that provides feedback according to the priority of periodic feedback to the second reference signal.

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