CN113691472B

CN113691472B - PDCCH estimation method and communication device

Info

Publication number: CN113691472B
Application number: CN202110939726.1A
Authority: CN
Inventors: 杨江; 黄利军; 何翠
Original assignee: Unisoc Chongqing Technology Co Ltd
Current assignee: Unisoc Chongqing Technology Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2023-03-24
Anticipated expiration: 2041-08-16
Also published as: CN113691472A

Abstract

The application discloses a PDCCH estimation method and a communication device, wherein the method comprises the following steps: the terminal equipment determines the number N of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the first RS sample point number N, the terminal equipment selects N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH. The method provided by the application is beneficial to improving the flexibility of channel estimation and reducing the power consumption of the terminal equipment.

Description

PDCCH estimation method and communication device

Technical Field

The present invention relates to the field of communications, and in particular, to a PDCCH estimation method and a communication apparatus.

Background

Currently, in an existing Long Term Evolution (LTE) terminal scheme, channel estimation is generally performed based on a fixed Reference Signal (RS) sample point, or Channel estimation is performed on a Physical Downlink Control Channel (PDCCH) of a subframe within a preset time. Such an approach may reduce the flexibility of channel estimation for different channel environments.

Disclosure of Invention

The application provides a PDCCH estimation method and a communication device, which are beneficial to improving the flexibility of channel estimation.

In a first aspect, the present application provides a PDCCH estimation method, including: the terminal equipment determines the number N of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the first RS sample point number N, the terminal equipment selects N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH.

Based on the method described in the first aspect, the terminal device determines the number N of first RS sample points used for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, and when the number of valid RS sample points in the valid RS sample point candidate set reaches the number N of the first RS sample points, the terminal device selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH. Based on the method, the flexibility of channel estimation is improved.

In one possible implementation, before the terminal device selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the method further includes: the terminal equipment updates the effective RS sample point candidate set based on the channel environment parameter and the decoding performance parameter. Based on the method, the accuracy of channel estimation is improved.

In a possible implementation manner, the updating, by the terminal device, the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter includes: the terminal equipment determines an effective symbol distance parameter based on the channel environment parameter and the decoding performance parameter; the terminal equipment calculates the symbol distance parameter between each effective RS sample point in the effective RS sample point candidate set and the subframe control area; if the symbol distance parameter is greater than the valid symbol distance parameter, the terminal device removes the valid RS sample point corresponding to the symbol distance parameter from the valid RS sample point candidate set. Based on the method, the accuracy of channel estimation is improved.

In one possible implementation, the method further includes: and if the number of the effective RS sample points in the effective RS sample point candidate set reaches a preset threshold value, the terminal equipment removes the effective RS sample point added earliest in the effective RS sample point candidate set.

In one possible implementation manner, the selecting, by the terminal device, N valid RS sample points from the valid RS sample point candidate set for estimating the PDCCH includes: and the terminal equipment selects N valid RS sample points added latest from the valid RS sample point candidate set to estimate the PDCCH.

In one possible implementation, the method further includes: the terminal equipment decodes the PDCCH based on the channel estimation result of the PDCCH and the data of the subframe control region; if the decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, the terminal device ends receiving the subframe. Based on the mode, the power consumption of the terminal equipment is reduced.

In a second aspect, the present application provides a communication device for implementing the units of the method in the first aspect and any possible implementation manner thereof.

In a third aspect, the present application provides a communication device comprising a processor configured to perform the method of the first aspect and any possible implementation manner thereof.

In a fourth aspect, the present application provides a communication device comprising a processor and a memory for storing computer-executable instructions; the processor is configured to invoke the program code from the memory to perform the method of the first aspect and any possible implementation thereof.

In a fifth aspect, the present application provides a communication device comprising a processor and a transceiver for receiving signals or transmitting signals; the processor is configured to perform the method of the first aspect and any one of its possible implementations.

In a sixth aspect, the present application provides a communication device comprising a processor, a memory, and a transceiver for receiving signals or transmitting signals; the memory is used for storing program codes; the processor is configured to invoke the program code from the memory to perform the method according to the first aspect and any possible implementation manner thereof.

In a seventh aspect, the present application provides a chip, where the chip is configured to determine, based on a channel environment parameter and a decoding performance parameter, the number N of first RS sample points used for PDCCH estimation, where N is a positive integer; the chip is configured to select N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH when the number of valid RS sample points in the valid RS sample point candidate set reaches the number N of the first RS sample points.

In an eighth aspect, the present application provides a module device, which includes a communication module, a power module, a storage module, and a chip module, wherein: the power module is used for providing electric energy for the module equipment; the storage module is used for storing data and instructions; the communication module is used for carrying out internal communication of the module equipment or is used for carrying out communication between the module equipment and external equipment; this chip module is used for: determining the number N of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, selecting N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH.

In a ninth aspect, the present application provides a computer-readable storage medium having stored thereon computer-readable instructions which, when run on a communication device, cause the communication device to perform the method of the first aspect and any of its possible implementations.

In a tenth aspect, the present application provides a computer program or computer program product comprising code or instructions which, when run on a computer, cause the computer to perform the method as in the first aspect and any one of its possible implementations.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of a network architecture provided in an embodiment of the present application;

fig. 2 is a flowchart of PDCCH estimation provided in an embodiment of the present application;

fig. 3 is a flowchart of another PDCCH estimation provided in an embodiment of the present application;

fig. 4 is a flowchart of another PDCCH estimation provided in an embodiment of the present application;

fig. 5 is a schematic diagram of selecting RS sample points for PDCCH estimation according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram illustrating another example of selecting RS sample points for PDCCH estimation according to the embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a module apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the following embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the specification of the present application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the listed items.

It should be noted that the terms "first," "second," "third," and the like in the description and claims of the present application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than described or illustrated herein. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

First, some terms referred to in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1. The terminal equipment:

the terminal device in the embodiment of the present application is a device having a wireless communication function, and may be referred to as a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal device, a vehicle-mounted terminal device, an industrial control terminal device, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus. The terminal device may be fixed or mobile. It should be noted that the terminal device may support at least one wireless communication technology, such as a Long Term Evolution system (LTE), a New Radio (NR), and the like. For example, the terminal device may be a mobile phone (mobile phone), a tablet (pad), a desktop, a notebook, a kiosk, a vehicle terminal, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transport security (transportation safety), a wireless network terminal in smart city (smart city), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (wireless local, personal) station, a personal digital assistant (wlphone), a wireless communication terminal connected to a wireless network, a portable mobile terminal with future function, a wireless communication network, a wireless communication terminal with future evolution (PLMN), or other mobile communication device with a future function, etc. In some embodiments of the present application, the terminal device may also be an apparatus having a transceiving function, such as a system-on-chip. The chip system may include a chip and may further include other discrete devices, which is not limited in this embodiment of the present application.

2. A network device:

in this embodiment, the network device is a device that provides a wireless communication function for the terminal device, and may also be referred to as a Radio Access Network (RAN) device or an access network element. Therein, the network device may support at least one wireless communication technology, such as LTE, NR, etc. By way of example, network devices include, but are not limited to: a next generation base station (generation node B, gNB), an evolved node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home node B or home node B, HNB), a base band unit (base unit, TRP), a base transceiver point (bbitting and listening point), a Transmission Point (TP), a mobile switching center, etc., in a fifth generation mobile communication system (5 th-generation, 5G). The network device may also be a wireless controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in future mobile communication or a network device in a PLMN that is evolved in the future, and the like. In some embodiments, the network device may also be an apparatus, such as a system-on-chip, having functionality to provide wireless communication for the terminal device. By way of example, a system of chips may include a chip and may also include other discrete devices. In some embodiments, the network device may also communicate with an Internet Protocol (IP) network, such as the Internet (Internet), a private IP network, or other data network.

The embodiment of the present application may be applied to the network architecture schematic diagram shown in fig. 1, where the network architecture shown in fig. 1 is a network architecture of a wireless communication system, the network architecture generally includes a terminal device and a network device, and the number and the form of each device do not constitute a limitation to the embodiment of the present application. The network device may be a Base Station (BS), and the BS may provide communication services to multiple terminal devices, and multiple Base stations may also provide communication services to the same terminal device.

It should be noted that, currently, in an existing Long Term Evolution (LTE) terminal scheme, channel estimation is generally performed based on a fixed Reference Signal (RS) sample point, or Channel estimation is performed on a Physical Downlink Control Channel (PDCCH) of a subframe within a preset time. Such an approach may reduce the flexibility of channel estimation for different channel environments.

In order to improve the flexibility of channel estimation, the embodiment of the application provides a PDCCH estimation method. In order to better understand the PDCCH estimation method provided in the embodiments of the present application, the PDCCH estimation method is described in detail below.

Referring to fig. 2, fig. 2 is a flowchart of a PDCCH estimation method according to an embodiment of the present disclosure, where the PDCCH estimation method includes steps 201 to 202. The method execution subject shown in fig. 2 may be a terminal device (for example, refer to fig. 1), or the subject may be a chip in the terminal device. The method shown in fig. 2 is executed by taking a terminal device as an example. Wherein:

201. and the terminal equipment determines the number N of the first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer.

In the embodiment of the present application, the channel environment parameter is used to indicate current channel environment measurement information, and may be a signal-to-noise ratio parameter, a doppler parameter, a reference signal received power parameter, or the like. The decoding performance parameter is used to represent the decoding performance of the current channel. And the terminal equipment determines the number of the first RS sample points for PDCCH estimation according to the channel environment parameters and the decoding performance parameters. Based on the method, the flexibility of channel estimation is improved.

In a possible implementation manner, if the number of valid RS sample points in the valid RS sample point candidate set reaches a preset threshold, the terminal device removes the earliest added valid RS sample point in the valid RS sample point candidate set. The valid RS sample point candidate set may determine a preset threshold according to the capability of the terminal device, where the preset threshold represents the number of valid RS sample points that the valid RS sample point candidate set can accommodate at most. And when the number of the effective RS sample points stored in the effective RS sample point candidate set exceeds the preset threshold, the terminal equipment removes one or more effective RS sample points added at the earliest in the effective RS sample point candidate set according to the time dimension.

For example, there are 4 effective RS sample points in the effective RS sample point candidate set, and according to the time sequence, an effective RS sample point a, an effective RS sample point B, an effective RS sample point C, and an effective RS sample point D are sequentially added. The preset threshold corresponding to the valid RS sample point candidate set is 4, and at this time, the number of valid RS sample points in the valid RS sample point candidate set reaches the preset threshold, so the terminal device needs to remove the valid RS sample point a added earliest in the valid RS sample point candidate set, and then add the valid RS sample point E received latest into the valid RS sample point candidate set, so the valid RS sample points existing in the valid RS sample point candidate set at present are the valid RS sample point B, the valid RS sample point C, the valid RS sample point D, and the valid RS sample point E, respectively.

202. And when the number of the effective RS sample points in the effective RS sample point candidate set reaches the first RS sample point number N, the terminal equipment selects N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH.

In the embodiment of the application, the terminal device incorporates the received RS sample points into the effective RS sample point candidate set for management, and when the number of the effective RS sample points stored in the effective RS sample point candidate set reaches the number N of the first RS sample points, the terminal device selects N effective RS sample points to estimate the PDCCH.

For example, there are 5 effective RS sample points in the effective RS sample point candidate set, and according to the time sequence, an effective RS sample point a, an effective RS sample point B, an effective RS sample point C, an effective RS sample point D, and an effective RS sample point E are sequentially added. The number of the first RS sample points is 3, and 3 effective RS sample points are selected from the effective RS sample point candidate set to estimate the PDCCH.

In the method described in fig. 2, the terminal device determines the number N of first RS sample points used for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, and when the number of valid RS sample points in the valid RS sample point candidate set reaches the number N of the first RS sample points, the terminal device selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH. Therefore, based on the method described in fig. 2, it is beneficial to improve the flexibility of channel estimation.

Referring to fig. 3, fig. 3 is a flowchart of another PDCCH estimation method according to an embodiment of the present disclosure, where the PDCCH estimation method includes steps 301 to 305. Step 303 is a specific implementation manner of step 202. The method execution subject shown in fig. 3 may be a terminal device (for example, as shown in fig. 1), or the subject may be a chip in the terminal device. The method execution subject shown in fig. 3 takes a terminal device as an example. Wherein:

301. and the terminal equipment determines the number N of the first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer.

The specific implementation manner of step 301 is the same as that of step 201, and is not described herein again.

302. And the terminal equipment updates the effective RS sample point candidate set based on the channel environment parameter and the decoding performance parameter.

In the embodiment of the present application, for different channel environments and different decoding performances of different terminal devices, effective RS sample points included in an effective RS sample point candidate set have differences, so that the terminal device needs to update the effective RS sample point candidate set based on the channel environment parameter and the decoding performance parameter, and a subsequent terminal device selects N effective RS sample points from the updated effective RS sample point candidate set to estimate the PDCCH. Based on the method, the accuracy of channel estimation is improved.

303. And when the number of the effective RS sample points in the effective RS sample point candidate set reaches the first RS sample point number N, the terminal equipment selects the N effective RS sample points added at the latest from the effective RS sample point candidate set to estimate the PDCCH.

In this embodiment of the application, when the number of effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, the terminal device selects, according to the time dimension, the N effective RS sample points added at the latest from the effective RS sample point candidate set to estimate the PDCCH.

For example, there are 5 effective RS sample points in the effective RS sample point candidate set, and according to the time sequence, an effective RS sample point a, an effective RS sample point B, an effective RS sample point C, an effective RS sample point D, and an effective RS sample point E are sequentially added. The number of the first RS sample points is 3, and the PDCCH is estimated by selecting the 3 latest added effective RS sample points from the effective RS sample point candidate set, that is, effective RS sample point C, effective RS sample point D, and effective RS sample point E.

304. And the terminal equipment decodes the PDCCH based on the channel estimation result of the PDCCH and the data of the control area of the subframe.

In the embodiment of the application, the terminal device decodes the PDCCH by using the channel estimation result of the PDCCH and the data in the subframe control region to obtain the resource information transmitted by the PDSCH, and then completes the decoding of the PDSCH in the data region according to the resource information indicated by the PDCCH to obtain the service data.

305. And if the decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, the terminal equipment finishes receiving the subframe.

In this embodiment of the present application, if the decoding result of the PDCCH indicates that there is no DCI for scheduling the PDSCH, that is, indicates that there is no indication for data transmission, the terminal device immediately ends reception of the subframe. Based on the mode, the power consumption of the terminal equipment is reduced.

In the method described in fig. 3, the terminal device determines the number of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, and updates the effective RS sample point candidate set; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the first RS sample point number N, the terminal equipment selects N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH. Therefore, based on the method described in fig. 3, it is beneficial to improve the flexibility of channel estimation.

Referring to fig. 4, fig. 4 is a flowchart of another PDCCH estimation method according to an embodiment of the present disclosure, where the PDCCH estimation method includes steps 401 to 407. The steps 402 to 404 are specific implementations of the step 302. The method execution subject shown in fig. 4 may be a terminal device (for example, as shown in fig. 1), or the subject may be a chip in the terminal device. The method execution subject shown in fig. 4 takes a terminal device as an example. Wherein:

401. and the terminal equipment determines the number N of the first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer.

The specific implementation manner of step 401 is the same as that of step 301, and is not described herein again.

402. The terminal equipment determines an effective symbol distance parameter based on the channel environment parameter and the decoding performance parameter.

403. And the terminal equipment calculates the symbol distance parameter between each effective RS sample point in the effective RS sample point candidate set and the control area of the subframe.

404. If the symbol distance parameter is greater than the valid symbol distance parameter, the terminal device removes the valid RS sample point corresponding to the symbol distance parameter from the valid RS sample point candidate set.

In this embodiment, the terminal device updates the valid RS sample point candidate set by using the effective symbol distance parameter determined by the channel environment parameter and the decoding performance parameter, and the symbol distance parameter between each valid RS sample point in the valid RS sample point candidate set and the subframe control region.

For example, the terminal device determines that the effective symbol distance parameter is 3 symbols based on the channel environment parameter and the decoding performance parameter, and the effective RS sample point candidate set includes 5 effective RS sample points, where the symbol distance parameter between the effective RS sample point a and the subframe control region is 5 symbols, the symbol distance parameter between the effective RS sample point B and the subframe control region is 4 symbols, the symbol distance parameter between the effective RS sample point C and the subframe control region is 3 symbols, the symbol distance parameter between the effective RS sample point D and the subframe control region is 2 symbols, and the symbol distance parameter between the effective RS sample point E and the subframe control region is 1 symbol. The symbol distance parameter corresponding to the valid RS sample point a and the valid RS sample point B is greater than the valid symbol distance parameter, so the terminal device removes the valid RS sample point a and the valid RS sample point B from the valid RS sample point candidate set, that is, the updated valid RS sample point candidate set only includes the valid RS sample point C, the valid RS sample point D, and the valid RS sample point E.

405. And when the number of the effective RS sample points in the effective RS sample point candidate set reaches the first RS sample point number N, the terminal equipment selects the N effective RS sample points added at the latest from the effective RS sample point candidate set to estimate the PDCCH.

406. And the terminal equipment decodes the PDCCH based on the channel estimation result of the PDCCH and the data of the control area of the subframe.

407. And if the decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, the terminal equipment finishes receiving the subframe.

The specific implementation manners of steps 405 to 407 are the same as those of steps 303 to 305, and are not described herein again.

For example, as shown in fig. 5, fig. 5 is a schematic diagram of selecting RS sample points for PDCCH estimation according to an embodiment of the present disclosure. In this example, the preset threshold of the valid RS sample points that can be contained in the valid RS sample point candidate set is 5, and the valid symbol distance parameter determined by the terminal device using the channel environment parameter and the decoding performance parameter is 3 symbols, so that the valid RS sample point candidate set includes a valid RS sample point a, a valid RS sample point B, and a valid RS sample point C. The terminal equipment determines that the number of the first RS sample points used for PDCCH estimation is 2 based on the channel environment parameters and the decoding performance parameters, so that the terminal equipment selects 2 effective RS sample points added at the latest, namely an effective RS sample point B and an effective RS sample point C, and estimates the PDCCH. The decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, and thus the terminal device ends the reception of the subframe N + 2.

For example, as shown in fig. 6, fig. 6 is a schematic diagram of selecting RS sample points for PDCCH estimation according to another embodiment of the present disclosure. In this example, the preset threshold of the valid RS sample points that can be accommodated in the valid RS sample point candidate set is 5, the effective symbol distance parameter determined by the terminal device using the channel environment parameter and the decoding performance parameter is 3 symbols, the terminal device determines that the number of the first RS sample points used for PDCCH estimation is 1 based on the channel environment parameter and the decoding performance parameter, the terminal device does not receive the subframe N +1, and at this time, the number of the valid RS sample points in the valid RS sample point candidate set does not reach the number of the first RS sample points, so that PDCCH estimation cannot be performed, and the terminal device needs to continue to wait for receiving the valid RS sample points. The terminal equipment adds the first effective RS sample point A of the received subframe N +2 into the effective RS sample point candidate set, and the symbol distance parameter corresponding to the effective RS sample point A is not greater than the effective symbol distance parameter, so that the effective RS sample point A does not need to be removed. At this time, the number of effective RS sample points in the effective RS sample point candidate set reaches the number of the first RS sample points, so the terminal device selects the effective RS sample point a to estimate the PDCCH.

In the method described in fig. 4, the terminal device determines the number of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, and updates the effective RS sample point candidate set; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, the terminal equipment selects N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH. Therefore, based on the method described in fig. 4, it is beneficial to improve the flexibility of channel estimation.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application. The apparatus may be a terminal device, an apparatus in the terminal device, or an apparatus capable of being used in cooperation with the terminal device. The communication device 70 shown in fig. 7 may include a processing unit 701 and a communication unit 702. The processing unit 701 is configured to perform data processing. The communication unit 702 is integrated with a receiving unit and a transmitting unit. The communication unit 702 may also be referred to as a transceiving unit. Alternatively, communication section 702 may be divided into a reception section and a transmission section. The processing unit 701 and the communication unit 702 are similar, and are not described in detail below. Wherein:

a processing unit 701, configured to determine, based on the channel environment parameter and the decoding performance parameter, the number N of first RS sample points used for PDCCH estimation, where N is a positive integer.

The processing unit 701 is further configured to, when the number of valid RS sample points in the valid RS sample point candidate set reaches the first number N of RS sample points, the terminal device selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH.

Optionally, before selecting N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the processing unit 701 is further configured to: updating the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter.

Optionally, when updating the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter, the processing unit 701 is specifically configured to: determining an effective symbol distance parameter based on the channel environment parameter and the decoding performance parameter; calculating a symbol distance parameter of each effective RS sample point in the effective RS sample point candidate set and the subframe control region; if the symbol distance parameter is greater than the valid symbol distance parameter, then removing the valid RS sample point corresponding to the symbol distance parameter from the valid RS sample point candidate set.

Optionally, the processing unit 701 is further configured to: and if the number of the effective RS sample points in the effective RS sample point candidate set reaches a preset threshold value, removing the effective RS sample point added in the effective RS sample point candidate set at the earliest time.

Optionally, when selecting N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the processing unit 701 is specifically configured to: and selecting N effective RS sample points added latest from the effective RS sample point candidate set to estimate the PDCCH.

Optionally, the processing unit 701 is further configured to: decoding the PDCCH based on the channel estimation result of the PDCCH and the data of the subframe control region; and if the decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, ending the reception of the subframe.

The communication device may be, for example: a chip, or a chip module. Each module included in each apparatus and product described in the above embodiments may be a software module, a hardware module, or a part of the software module and a part of the hardware module. For example, for each device or product applied to or integrated in a chip, each module included in the device or product may be implemented by hardware such as a circuit, or at least a part of the modules may be implemented by a software program running on a processor integrated in the chip, and the rest (if any) part of the modules may be implemented by hardware such as a circuit; for each device and product applied to or integrated with the chip module, each module included in the device and product may be implemented in a hardware manner such as a circuit, and different modules may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least a part of the modules may be implemented in a software program running on a processor integrated within the chip module, and the rest (if any) part of the modules may be implemented in a hardware manner such as a circuit; for each device and product applied to or integrated in the terminal, each module included in the device and product may be implemented by using hardware such as a circuit, different modules may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least a part of the modules may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules may be implemented by using hardware such as a circuit.

Fig. 8 shows another communication apparatus 80 provided in the embodiment of the present application, which is used to implement the functions of the terminal devices in fig. 2 to fig. 4. The apparatus may be a terminal device or an apparatus for a terminal device. The means for the terminal device may be a system of chips or a chip within the terminal device. The chip system may be composed of a chip, or may include a chip and other discrete devices.

The communication device 80 includes at least one processor 820 for implementing the data processing function of the terminal device in the method provided by the embodiment of the present application. The apparatus 80 may further include a communication interface 810, configured to implement transceiving operations of a terminal device in the method provided in the embodiment of the present application. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices over a transmission medium. For example, communication interface 810 is used for devices in apparatus 80 to communicate with other devices. The processor 820 transmits and receives data using the communication interface 810 and is configured to implement the methods described above with respect to the method embodiments of fig. 2-4.

The apparatus 80 may also include at least one memory 830 for storing program instructions and/or data. The memory 830 is coupled with the processor 820. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 820 may operate in conjunction with the memory 830. Processor 820 may execute program instructions stored in memory 830. At least one of the at least one memory may be included in the processor.

When the apparatus 80 is powered on, the processor 820 can read the software program in the memory 830, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 820 performs baseband processing on the data to be sent, and outputs a baseband signal to a radio frequency circuit (not shown), and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through an antenna. When data is transmitted to the apparatus 80, the rf circuit receives an rf signal through the antenna, converts the rf signal into a baseband signal, and outputs the baseband signal to the processor 820, and the processor 820 converts the baseband signal into data and processes the data.

In another implementation, the rf circuitry and antennas may be provided independently of the processor 820 performing baseband processing, e.g., in a distributed scenario, the rf circuitry and antennas may be in a remote arrangement independent of the communication device.

The embodiment of the present application does not limit the specific connection medium among the communication interface 810, the processor 820 and the memory 830. In fig. 8, the memory 830, the processor 820 and the communication interface 810 are connected by a bus 840, the bus is represented by a thick line in fig. 8, and the connection manner among other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

When the apparatus 80 is specifically for a terminal device, for example, when the apparatus 80 is specifically a chip or a chip system, the output or the reception of the communication interface 810 may be a baseband signal. When the apparatus 80 is specifically a terminal device, the output or the reception of the communication interface 810 may be a radio frequency signal. In the embodiments of the present application, the processor may be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, operations, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The operations of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

It should be noted that, the communication apparatus may perform relevant steps of the terminal device or the access network device in the foregoing method embodiments, which may specifically refer to implementation manners provided in the foregoing steps, and details are not described herein again.

For each device or product applied to or integrated in the communication device, each module included in the device or product may be implemented by hardware such as a circuit, different modules may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least a part of the modules may be implemented by a software program running on a processor integrated in the terminal, and the rest (if any) of the modules may be implemented by hardware such as a circuit.

An embodiment of the present application further provides a chip, which includes a processor and a communication interface, where the processor is configured to perform the following operations: determining the number N of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, selecting N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH.

Optionally, before selecting N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the chip is further configured to: updating the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter.

Optionally, when updating the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter, the chip is specifically configured to: determining an effective symbol distance parameter based on the channel environment parameter and the decoding performance parameter; calculating a symbol distance parameter of each effective RS sample point in the effective RS sample point candidate set and the subframe control region; if the symbol distance parameter is greater than the valid symbol distance parameter, then removing the valid RS sample point corresponding to the symbol distance parameter from the valid RS sample point candidate set.

Optionally, the chip is further configured to: and if the number of the effective RS sample points in the effective RS sample point candidate set reaches a preset threshold value, removing the effective RS sample point added in the effective RS sample point candidate set at the earliest time.

Optionally, when the chip selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the chip is specifically configured to: and selecting N valid RS sample points added latest from the valid RS sample point candidate set to estimate the PDCCH.

Optionally, the chip is further configured to: decoding the PDCCH based on the channel estimation result of the PDCCH and the data of the subframe control region; and if the decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, ending the reception of the subframe.

In a possible implementation, the chip includes at least one processor, at least one first memory, and at least one second memory; the at least one first memory and the at least one processor are interconnected through a line, and instructions are stored in the first memory; the at least one second memory and the at least one processor are interconnected through a line, and the second memory stores the data required to be stored in the method embodiment.

For each device or product applied to or integrated in the chip, each module included in the device or product may be implemented by hardware such as a circuit, or at least a part of the modules may be implemented by a software program running on a processor integrated in the chip, and the rest (if any) part of the modules may be implemented by hardware such as a circuit.

As shown in fig. 9, fig. 9 is a schematic structural diagram of a module device according to an embodiment of the present application. The module device 90 can perform the steps related to the terminal device in the foregoing method embodiments, and the module device 90 includes: a communication module 901, a power module 902, a memory module 903, and a chip module 904.

The power module 902 is configured to provide power for the module device; the storage module 903 is used for storing data and instructions; the communication module 901 is used for performing internal communication of module equipment, or for performing communication between the module equipment and external equipment; the chip module 904 is configured to: determining the number N of first RS sample points for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer; and when the number of the effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, selecting N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH.

Optionally, before the chip module 904 selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the chip module is further configured to: updating the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter.

Optionally, when the chip module 904 updates the valid RS sample point candidate set based on the channel environment parameter and the decoding performance parameter, it is specifically configured to: determining an effective symbol distance parameter based on the channel environment parameter and the decoding performance parameter; calculating the symbol distance parameter between each effective RS sample point in the effective RS sample point candidate set and the subframe control area; if the symbol distance parameter is greater than the valid symbol distance parameter, then removing the valid RS sample point corresponding to the symbol distance parameter from the valid RS sample point candidate set.

Optionally, the chip module 904 is further configured to: and if the number of the effective RS sample points in the effective RS sample point candidate set reaches a preset threshold value, removing the effective RS sample point added in the effective RS sample point candidate set at the earliest time.

Optionally, when the chip module 904 selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the chip module is specifically configured to: and selecting N effective RS sample points added latest from the effective RS sample point candidate set to estimate the PDCCH.

Optionally, the chip module 904 is further configured to: decoding the PDCCH based on the channel estimation result of the PDCCH and the data of the subframe control region; and if the decoding result of the PDCCH indicates that the DCI of the PDSCH is not scheduled, ending the reception of the subframe.

For each device and product applied to or integrated in the chip module, each module included in the device and product may be implemented by using hardware such as a circuit, and different modules may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules may be implemented by using a software program running on a processor integrated in the chip module, and the rest (if any) of the modules may be implemented by using hardware such as a circuit. Embodiments of the present application further provide a computer-readable storage medium, in which instructions are stored, and when the computer-readable storage medium is executed on a processor, the method flow of the above method embodiments is implemented.

Embodiments of the present application further provide a computer program product, where when the computer program product runs on a processor, the method flow of the above method embodiments is implemented.

It is noted that, for simplicity of explanation, the foregoing method embodiments are described as a series of acts or combination of acts, but those skilled in the art will appreciate that the present application is not limited by the order of acts, as some acts may, in accordance with the present application, occur in other orders and/or concurrently. Further, those skilled in the art will recognize that the embodiments described in this specification are preferred embodiments and that acts or modules referred to are not necessarily required for this application.

The descriptions of the embodiments provided in the present application may refer to each other, and the descriptions of the embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments. For convenience and brevity of description, for example, the functions and operations performed by the devices and apparatuses provided in the embodiments of the present application may refer to the related descriptions of the method embodiments of the present application, and may also be referred to, combined with or cited among the method embodiments and the device embodiments.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A Physical Downlink Control Channel (PDCCH) estimation method is characterized by comprising the following steps:

the terminal equipment determines the number N of first reference signal RS sample points for PDCCH estimation based on the channel environment parameters and the decoding performance parameters, wherein N is a positive integer;

when the number of effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, the terminal equipment selects N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH;

before the terminal device selects N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH, the terminal device updates the valid RS sample point candidate set based on the channel environment parameter and the coding performance parameter.

2. The method of claim 1, wherein the terminal device updating the valid RS sample point candidate set based on the channel environment parameter and the coding performance parameter comprises:

the terminal equipment determines an effective symbol distance parameter based on the channel environment parameter and the decoding performance parameter;

the terminal equipment calculates the symbol distance parameter between each effective RS sample point in the effective RS sample point candidate set and the subframe control area;

and if the symbol distance parameter is greater than the effective symbol distance parameter, the terminal equipment removes the effective RS sample point corresponding to the symbol distance parameter from the effective RS sample point candidate set.

3. The method of claim 1, further comprising:

and if the number of the effective RS sample points in the effective RS sample point candidate set reaches a preset threshold value, the terminal equipment removes the effective RS sample point added at the earliest in the effective RS sample point candidate set.

4. The method of claim 1, wherein the terminal device selects N valid RS sample points from the candidate set of valid RS sample points for estimating the PDCCH, and wherein the selecting comprises:

and the terminal equipment selects N effective RS sample points added latest from the effective RS sample point candidate set to estimate the PDCCH.

5. The method of claim 1, further comprising:

the terminal equipment decodes the PDCCH based on the channel estimation result of the PDCCH and the data of the subframe control region;

and if the decoding result of the PDCCH indicates that the downlink control information DCI of the PDSCH is not scheduled, the terminal equipment finishes receiving the subframe.

6. A communication apparatus, characterized in that the communication apparatus comprises a processing unit and a communication unit, wherein:

the processing unit is used for determining the number N of the RS sample points of the first reference signal for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer;

the processing unit is further configured to select N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH when the number of effective RS sample points in the effective RS sample point candidate set reaches the first number N of RS sample points;

the processing unit is further configured to update the valid RS sample point candidate set based on the channel environment parameter and the coding performance parameter before selecting N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH;

the communication unit is used for receiving and transmitting data.

7. A communication device comprising a processor and a transceiver;

the transceiver is used for receiving or transmitting signals;

the processor configured to perform the method of any one of claims 1 to 5.

8. The communications apparatus of claim 7, the communications apparatus further comprising a memory:

the memory for storing a computer program;

the processor, in particular for invoking the computer program from the memory, causes the communication device to perform the method of any of claims 1-5.

9. A chip, characterized in that,

the chip is used for determining the number N of the RS sample points of the first reference signal for PDCCH estimation based on the channel environment parameter and the decoding performance parameter, wherein N is a positive integer;

the chip is used for selecting N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH when the number of the effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points;

the chip is configured to update the valid RS sample point candidate set based on the channel environment parameter and the coding performance parameter before selecting N valid RS sample points from the valid RS sample point candidate set to estimate the PDCCH.

10. A module device for Physical Downlink Control Channel (PDCCH) estimation is characterized in that the module device comprises a communication module, a power module, a storage module and a chip module, wherein:

the power supply module is used for providing electric energy for the module equipment;

the storage module is used for storing data and instructions;

the communication module is used for carrying out internal communication of module equipment or is used for carrying out communication between the module equipment and external equipment;

the chip module is used for:

determining the number N of first Reference Signal (RS) sample points for PDCCH estimation based on channel environment parameters and decoding performance parameters, wherein N is a positive integer;

when the number of the effective RS sample points in the effective RS sample point candidate set reaches the number N of the first RS sample points, selecting N effective RS sample points from the effective RS sample point candidate set to estimate the PDCCH;

updating the valid RS sample point candidate set based on the channel environment parameter and the coding performance parameter before selecting N valid RS sample points from the valid RS sample point candidate set for estimating the PDCCH.

11. A computer readable storage medium having computer readable instructions stored therein, which when run on a communication apparatus, cause the communication apparatus to perform the method of any one of claims 1-5.