CN109392151B - Method, device and system for determining PDCCH search space - Google Patents

Method, device and system for determining PDCCH search space Download PDF

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Publication number
CN109392151B
CN109392151B CN201710687951.4A CN201710687951A CN109392151B CN 109392151 B CN109392151 B CN 109392151B CN 201710687951 A CN201710687951 A CN 201710687951A CN 109392151 B CN109392151 B CN 109392151B
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pdcch
configuration information
search space
pdcch search
module
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CN109392151A (en
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纪子超
潘学明
沈晓东
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

The embodiment of the invention provides a method, a device and a system for determining a PDCCH search space, which relate to the technical field of wireless communication, can realize blind detection of a plurality of PDCCHs in a 5G system, and are applied to UE (user equipment), wherein the method comprises the following steps: the method comprises the steps of obtaining PDCCH resource configuration information and PDCCH search space configuration information, and generating at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information, wherein the at least one PDCCH search space is used for UE blind detection of a PDCCH, the PDCCH resource configuration information is used for indicating time-frequency resources of the PDCCH configured for the UE by network equipment, and the PDCCH search space configuration information comprises at least one of first configuration information and second configuration information.

Description

Method, device and system for determining PDCCH search space
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a method, a device and a system for determining a PDCCH search space.
Background
In a wireless communication system, a User Equipment (UE) may obtain information such as a physical resource location occupied by Downlink Control Information (DCI) and a resource size occupied by DCI by blind-detecting a Physical Downlink Control Channel (PDCCH).
In a Long Term Evolution (LTE) system, a terminal performs downlink channel estimation according to a cell-specific reference signal (CRS), and then performs blind detection in a search space according to a downlink channel estimation result, in the LTE system, the same PDCCH is multiplexed in the whole cell, and a search space for UE blind detection in the LTE system is formed by all or part of CCEs in all Control Channel Elements (CCEs) of the PDCCH according to a certain aggregation level and a certain PDCCH candidate set, so that the UE can perform blind detection on the PDCCH in the search space.
However, in a fifth generation (5 generation, 5G) mobile communication system (hereinafter, referred to as a 5G system), one cell may support a plurality of PDCCHs with different sizes, and in the process of performing blind detection on each PDCCH, a search space in the conventional LTE system cannot be applied to the 5G system any more, so that blind detection of a plurality of PDCCHs may not be achieved.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for determining a PDCCH search space, which aim to solve the technical problem that the PDCCH in a 5G system cannot be subjected to blind detection.
In order to achieve the purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for determining a PDCCH search space, where the method is applied to a UE, the UE acquires PDCCH resource configuration information and PDCCH search space configuration information, and generates at least one PDCCH search space according to the PDCCH resource configuration and PDCCH search space configuration information, where the PDCCH resource configuration information is used to indicate a time-frequency resource of a PDCCH configured by a network device for the UE, and the PDCCH search space configuration information includes at least one of first configuration information and second configuration information, where the first configuration information includes an aggregation level of control channel elements, CCEs, of each PDCCH search space in the at least one PDCCH search space and a number of PDCCH candidate sets of each PDCCH search space in the at least one PDCCH search space, and the second configuration information includes a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space is used for blind detection of at least one item of PDCCH in a gap between two adjacent PDCCH candidate sets in each PDCCH search space in the at least one PDCCH search space.
Therefore, the UE can generate at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information, and the UE can realize the blind detection of the PDCCH in the at least one PDCCH search space so as to solve the problem that the blind detection of the PDCCH cannot be realized by adopting the search space in the prior art.
In a second aspect, an embodiment of the present invention provides a method for determining a PDCCH search space, where the method is applied to a network device, and the method may include: generating PDCCH resource configuration information, and sending the PDCCH resource configuration information to the UE, wherein the PDCCH resource configuration information is used for indicating time-frequency resources of a PDCCH configured for the UE by network equipment.
Therefore, the UE can generate at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information, and the UE can realize the PDCCH blind detection in the at least one PDCCH search space so as to solve the problem that the PDCCH blind detection cannot be realized by adopting the search space in the prior art.
In a third aspect, the present application provides a UE, which may include an obtaining module and a generating module. The obtaining module may be configured to obtain PDCCH resource configuration information and PDCCH search space configuration information, where the PDCCH resource configuration information is used to indicate a time-frequency resource of a PDCCH configured by the network device for the UE, and the PDCCH search space configuration information includes at least one of the first configuration information and the second configuration information. Wherein the first configuration information may include an aggregation level of Control Channel Elements (CCEs) of each of the at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space; the second configuration information may include a search direction of each of at least one PDCCH search space, a search start offset of each of the at least one PDCCH search space, and at least one of gaps between two PDCCH candidate sets that are adjacent within each of the at least one PDCCH search space.
In a third aspect, the generating module may be configured to generate at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information acquired by the acquiring module, where the at least one PDCCH search space is used for the UE to perform blind detection on the PDCCH.
In a fourth aspect, an embodiment of the present invention provides a network device, which may include a generating module and a sending module. The generating module may be configured to generate PDCCH resource configuration information, where the PDCCH resource configuration information is used to indicate time-frequency resources of a PDCCH configured by a network device for the UE.
In a first optional implementation manner of the fourth aspect, the generating module is further configured to generate PDCCH search space configuration information, where the PDCCH search space configuration information includes at least one of the first configuration information and the second configuration information.
Wherein the first configuration information includes an aggregation level of Control Channel Elements (CCEs) of each of the at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space.
The second configuration information includes at least one of a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets adjacent in each PDCCH search space in the at least one PDCCH search space.
In a fifth aspect, a UE is provided, which may include: a processor, a memory, and a computer program stored on the memory and executable on the processor. Wherein the computer program when executed by a processor implements a method of determining a PDCCH search space as described in the first aspect and various alternatives of the first aspect.
In a sixth aspect, the present invention provides a computer-readable storage medium, which stores thereon a computer program, and when executed by a processor in the fifth aspect, the computer program implements the method for determining a PDCCH search space according to the first aspect and various alternatives of the first aspect.
In a seventh aspect of embodiments of the present invention, embodiments of the present invention provide a computer program product, which when run on a computer, causes the computer to perform the method for determining a PDCCH search space according to the first aspect and various alternatives of the first aspect.
In an eighth aspect of the embodiments of the present invention, an apparatus for determining a PDCCH search space is provided, where the apparatus for determining a PDCCH search space exists in a chip product form, and the apparatus for determining a PDCCH search space may include: a processor, a memory, and a computer program stored on the memory and executable on the processor. Wherein the computer program when executed by a processor implements a method of determining a PDCCH search space as described in the first aspect and various alternatives of the first aspect.
For the description of the related contents and technical effects of the fifth aspect to the eighth aspect, reference may be made to the above description of the related contents and technical effects of the first aspect or any one of its possible implementations, and details are not repeated here.
In a ninth aspect, an embodiment of the present invention provides a network device, where the network device may include: a processor, a memory, and a computer program stored on the memory and executable on the processor. Wherein the computer program when executed by a processor implements a method of determining a PDCCH search space as set forth in the second aspect and various alternatives of the second aspect.
In a tenth aspect, the present invention provides a computer-readable storage medium, which stores thereon a computer program, which, when executed by a processor in the ninth aspect, implements the method for determining a PDCCH search space according to the second aspect and various alternatives of the second surface.
In an eleventh aspect, embodiments of the present invention provide a computer program product, which when run on a computer, causes the computer to perform a method for determining a PDCCH search space according to the second aspect and various alternatives of the second aspect.
In a twelfth aspect of the embodiments of the present invention, there is provided an apparatus for determining a PDCCH search space, where the apparatus for determining a PDCCH search space exists in a chip product form, and the apparatus for determining a PDCCH search space may include: a processor, a memory, and a computer program stored on the memory and executable on the processor. Wherein the computer program when executed by a processor implements a method of determining a PDCCH search space as set forth in the second aspect and various alternatives of the second aspect.
For the description of the related contents and technical effects of the ninth aspect to the twelfth aspect, reference may be made to the above description of the related contents and technical effects of the second aspect or any one of its possible implementations, and details are not described here again.
In a thirteenth aspect, an embodiment of the present invention provides a wireless communication system, where the wireless communication system may include the UE in the third aspect or any one of its possible implementations, and a network device in the fourth aspect or any one of its possible implementations.
Alternatively, the wireless communication system may include the UE in the fifth aspect and the network device in the ninth aspect.
For a description of relevant contents and technical effects of the thirteenth aspect, reference may be made to the above description of relevant contents and technical effects of the first aspect or any one of its possible implementations and the second aspect or any one of its possible implementations, and details are not described here again.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described 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 based on these drawings without inventive labor.
Fig. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;
fig. 2 is a hardware schematic diagram of a base station according to an embodiment of the present invention;
fig. 3 is a schematic hardware diagram of a mobile phone according to an embodiment of the present invention;
fig. 4 is a first schematic diagram illustrating a method for determining a PDCCH search space according to an embodiment of the present invention;
fig. 5 is a first schematic diagram of a PDCCH search space according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a PDCCH search space according to an embodiment of the present invention;
fig. 7 is a third schematic diagram of a PDCCH search space according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a PDCCH search space according to a fourth embodiment of the present invention;
fig. 9 is a fifth schematic diagram of a PDCCH search space according to an embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a second method for determining a PDCCH search space according to an embodiment of the present invention;
fig. 11 is a third schematic diagram illustrating a method for determining a PDCCH search space according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a UE according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described 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 that other drawings can be obtained according to the drawings without inventive labor.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The terms "first" and "second," and the like, in the description and in the claims of embodiments of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first configuration information, the second configuration information, and the like are used to distinguish different configuration information, and are not used to describe a specific order of the configuration information.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of processing units refers to two or more processing units; a plurality of systems refers to two or more systems.
First, some concepts involved in a method, an apparatus, and a system for determining a PDCCH search space according to embodiments of the present invention are explained.
PDCCH search space: in the process of blind detection of the PDCCH, in order to avoid the problem that the UE traverses all CCEs of the whole PDCCH once and causes large blind detection workload, a PDCCH search space (which can be understood as the range of the UE blind detection) can be constructed, and then the PDCCH blind detection is performed in the PDCCH search space, so that the blind detection times can be reduced and the workload of the blind detection is reduced. The PDCCH search space refers to: a set of multiple PDCCH candidate sets at a particular aggregation level.
The PDCCH search space is described in more detail below with an understanding of the aggregation level and the PDCCH search space.
Polymerization grade: one or more CCEs are aggregated together to obtain a PDCCH candidate set, and in the radio access technology standard such as LTE, the aggregation level may be 1,2,4,8, for example, if the aggregation level is 4, it indicates that 4 CCEs are aggregated together to serve as one PDCCH candidate set.
PDCCH candidate set: one PDCCH search space may include a plurality of PDCCH candidate sets formed by aggregating a number of CCEs indicated by a specific aggregation level.
Search direction of PDCCH search space: assuming that the number of CCEs configured by the network device for one PDCCH is 20, when the UE sequentially constructs a plurality of search spaces of the UE, the search spaces are constructed according to a certain search direction, for example, the 20 CCEs are numbered CCE0 to CCE19, and the search direction of the PDCCH may be a direction from CCE0 to CCE19 or a direction from CCE19 to CCE 0.
Search start offset of PDCCH search space: in the distance between the starting number of the CCE and the first CCE in one PDCCH search space, for example, in the aforementioned ccoo to CCE19, if the starting CCE in the PDCCH search space is CCE2, the search starting offset of the PDCCH search space is 2.
Gap of PDCCH candidate set: in a PDCCH search space, multiple PDCCH candidate sets may be included, a specified number of CCEs are spaced between every two PDCCH candidate sets, and if a first PDCCH candidate set is formed by aggregating CCEs 0 to CCE3 and a second PDCCH candidate set is formed by CCE8 to CCE11 in a PDCCH search space with an aggregation level of 4, it is known that the first PDCCH candidate set and the second PDCCH candidate set are spaced by 4 CCEs, that is, the gap between the first PDCCH candidate set and the second PDCCH candidate set is considered to be 4.
The resource position indication method and device for receiving the broadcast message provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may be a system adopting a fifth generation (5 th generation, 5G) mobile communication technology (hereinafter, referred to as a 5G system), and referring to fig. 1, it is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention. As shown in fig. 1, the wireless communication system may include a network device 10 and a UE 11, where the UE 11 may communicate with the network device 10. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 illustrates the connections between the devices by solid lines for convenience and convenience in visual representation.
It should be noted that the communication system may include a plurality of UEs, the network device and may communicate (transmit signaling or transmit data) with a plurality of UEs.
The network device provided in the embodiment of the present invention may be a base station, and the network device may be a commonly used base station, an evolved node base station (eNB), or a network device in a 5G system (e.g., a next generation base station (gNB) or a Transmission and Reception Point (TRP)). For example, the embodiment of the present invention takes a commonly used base station as an example to introduce a hardware structure of a network device. The following describes each component of the base station provided in the embodiment of the present invention with reference to fig. 2. As shown in fig. 2, a base station provided in an embodiment of the present invention may include: parts 20 and 21. The 20 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 21 part is mainly used for baseband processing, base station control, and the like. The 20 portion may be generally referred to as a transceiver unit, transceiver, transceiving circuitry, transceiver, or the like. Part 21 is typically a control center of the base station, which may be generally referred to as a processing unit, for controlling the base station to perform the steps described above with respect to the base station (i.e., serving base station) in fig. 2. Reference is made in particular to the description of the relevant part above.
The transceiver unit of part 20, which may also be referred to as a transceiver, or transceiver, etc., includes an antenna and a radio frequency unit, where the radio frequency unit is mainly used for radio frequency processing. Optionally, a device used for implementing the receiving function in the part 20 may be regarded as a receiving unit, and a device used for implementing the sending function may be regarded as a sending unit, that is, the part 20 includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, a receiving circuit, or the like, and the sending unit may be referred to as a transmitter, a transmitting circuit, or the like.
Section 21 may include one or more boards, each board may include one or more processors and one or more memories, the processors being configured to read and execute programs in the memories to implement baseband processing functions and control of the base station. If a plurality of single boards exist, the single boards can be interconnected to increase the processing capacity. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time. The memory and the processor may be integrated together or may be provided separately. In some embodiments, the 20 and 21 portions may be integrated or may be separate. In addition, all functions in the part 21 may be integrated into one chip, or part of functions may be integrated into one chip, and another part of functions may be integrated into one or more other chips, which is not limited in this application.
The UE provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), or the like.
Exemplarily, the embodiment of the present invention takes UE as a mobile phone as an example, and introduces a hardware structure of the UE. The following describes each component of the mobile phone provided by the embodiment of the present invention with reference to fig. 3. As shown in fig. 3, a mobile phone provided in an embodiment of the present invention includes: a processor 30, a Radio Frequency (RF) circuit 31, a power supply 32, a memory 33, an input unit 34, a display unit 35, and an audio circuit 36. Those skilled in the art will appreciate that the structure of the handset shown in fig. 3 does not constitute a limitation of the handset, and may include more or fewer components than those shown in fig. 3, or may combine some of the components shown in fig. 3, or may be arranged differently than those shown in fig. 3.
The processor 30 is the control center of the handset and connects the various parts of the entire handset using various interfaces and lines. The overall monitoring of the handset is performed by executing or executing software programs and/or modules stored in the memory 33 and calling data stored in the memory 33 to perform various functions of the handset and process the data. Alternatively, processor 30 may include one or more processing units. Optionally, the processor 30 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application program, and the like; the modem processor handles primarily wireless communications. It will be appreciated that the modem processor described above may also be a processor separate from the processor 30.
The RF circuit 31 may be used to receive and transmit signals during the transmission and reception of information or a call. For example, the downlink information of the base station is received and then processed by the processor 30; in addition, the uplink data is transmitted to the base station. Typically, the RF circuit includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), and a duplexer. In addition, the handset may also communicate wirelessly with other devices in the network via the RF circuitry 31. The wireless communication may use any communication standard or protocol, including but not limited to global system for mobile communications (GSM), general Packet Radio Service (GPRS), code Division Multiple Access (CDMA), wideband Code Division Multiple Access (WCDMA), LTE, email, and Short Messaging Service (SMS), among others.
The power supply 32 may be used to power the various components of the handset, and the power supply 32 may be a battery. Optionally, the power source may be logically connected to the processor 30 through a power management system, so as to implement functions of managing charging, discharging, power consumption management, and the like through the power management system.
The memory 33 may be used to store software programs and/or modules, and the processor 30 executes various functional applications and data processing of the mobile phone by operating the software programs and/or modules stored in the memory 33. The memory 33 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, image data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 33 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The input unit 34 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. Specifically, the input unit 34 may include a touch screen 341 and other input devices 342. The touch screen 341, also called a touch panel, may collect touch operations of a user on or near the touch screen 341 (for example, operations of the user on or near the touch screen 341 using any suitable object or accessory such as a finger or a stylus pen), and drive the corresponding connection device according to a preset program. Alternatively, the touch screen 341 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 30, and can receive and execute commands sent by the processor 30. In addition, the touch screen 341 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. Other input devices 342 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power switch keys, etc.), a trackball, a mouse, and a joystick.
The display unit 35 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 35 may include a display panel 351. Alternatively, the display panel 351 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like. Further, the touch screen 341 may cover the display panel 351, and when the touch screen 341 detects a touch operation on or near the touch screen, the touch screen is transmitted to the processor 30 to determine the type of the touch event, and then the processor 30 provides a corresponding visual output on the display panel 351 according to the type of the touch event. Although in fig. 3, the touch screen 341 and the display panel 351 are shown as two separate components to implement the input and output functions of the handset, in some embodiments, the touch screen 341 and the display panel 351 may be integrated to implement the input and output functions of the handset.
Audio circuitry 36, a speaker 361, and a microphone 362 provide an audio interface between a user and the handset. In one aspect, the audio circuit 36 may transmit the electrical signal converted from the received audio data to the speaker 361, and the audio signal is converted into a sound signal by the speaker 361 for output. On the other hand, the microphone 362 converts the collected sound signals into electrical signals, which are received by the audio circuit 36 and converted into audio data, which are then output by the processor 30 to the RF circuit 31 for transmission to, for example, another cellular phone, or output by the processor 30 to the memory 33 for further processing.
Optionally, the handset as shown in fig. 3 may also include various sensors. Such as gyroscope sensors, hygrometer sensors, infrared sensors, magnetometer sensors, etc., and will not be described in detail herein.
Optionally, the mobile phone shown in fig. 3 may further include a Wi-Fi module, a bluetooth module, and the like, which are not described herein again.
It should be noted that, in the embodiment of the present invention, the UE may generate at least one PDCCH search space according to the PDCCH resource configuration information and the PDCCH search space configuration information, where the PDCCH resource configuration information is configured by the network device to the UE, and the PDCCH search space configuration information may be configured by the network device to the UE or may be determined by the UE.
In the embodiment of the present invention, a combination of some specific configuration information in the PDCCH resource configuration information is referred to as first configuration information, and a combination of other configuration information in the PDCCH resource configuration information is referred to as second configuration information. In another case, the first configuration information may be configured for the UE by the network device, and the second configuration information is determined by the UE.
The above determining by the UE comprises determining according to a predefined configuration of the protocol, or determining according to at least one of:
an identity of the UE;
time information of a communication system in which the UE is located;
identification of synchronization signal blocks received by the UE.
Specific contents of the PDCCH resource allocation information and PDCCH search space allocation information, and contents of the first allocation information and the second allocation information are described in detail in the following embodiments.
Based on the above PDCCH resource configuration information and PDCCH search space configuration information, different methods may be adopted to configure to the UE.
In a first scenario, PDCCH resource configuration information is configured by a network device, and the first configuration information and the second configuration information are also configured by the network device.
Scene two: the PDCCH resource configuration information is configured by the network equipment, the first configuration information is configured by the network equipment, and the second configuration information is determined by the UE.
Scene three: the PDCCH resource configuration information is configured by the network device, and the first configuration information and the second configuration information are determined by the UE.
Scene one
In conjunction with the wireless communication system shown in fig. 1, as shown in fig. 4, an embodiment of the present invention provides a method for determining a PDCCH search space, where the method may include S101 to S104:
s101, the network equipment generates PDCCH resource configuration information and PDCCH search space configuration information.
The PDCCH resource configuration information is used for indicating time-frequency resources of a PDCCH configured for the UE by the network equipment.
For example, in the time-frequency resources of the PDDCH, the time-domain resources may be Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency-domain resources may be Physical Resource Blocks (PRBs).
The PDCCH search space configuration information includes first configuration information and second configuration information. Wherein the first configuration information may include an aggregation level of Control Channel Elements (CCEs) of each of the at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space.
In the embodiment of the present invention, the aggregation level of the CCE may be any one or more of 1,2,4,8, the network device configures different CCE aggregation levels for the UE, and the UE may generate different PDCCH search spaces according to the different aggregation levels.
For the description of the aggregation level, reference may be made to the description of the aggregation level in the introduction of the concept of the above embodiment, and details are not repeated here.
The second configuration information may include at least one of the following three configuration information A1 to A3.
A1, a search direction of each PDCCH search space in the at least one PDCCH search space.
In the embodiment of the present invention, the network device may configure, for the UE, the search directions for the UE to generate different PDCCH search spaces, or may configure, for the UE, the same search directions for the PDCCH search spaces, so that the UE generates PDCCH search spaces with different characteristics.
For example, if the number of CCEs configured for the UE by the network device through the PDCCH resource configuration information is 20, the search direction may be denoted as direction 1 where the CCE search direction is from CCE0 to CCE19, that is, the direction from small to large of the CCE number, and the search direction of the PDCCH search space may be denoted as direction 2 where the CCE search direction is from CCE19 to CCE0, that is, the direction from large to small of the CCE number.
Optionally, in the embodiment of the present invention, an identifier "0" may be used to indicate that the search direction is the direction 1, an identifier "1" may also be used to indicate that the search direction is the direction 1, and other identifiers that may identify the search direction may also be used to indicate the search direction, which is not specifically limited in the embodiment of the present invention.
For example, if the identifier "0" is used to indicate that the search direction is the direction 1, the identifier "1" may be used to indicate that the search direction is the direction 2, and specifically, an appropriate identifier may be selected to distinguish the direction 1 from the direction 2 according to actual situations.
And A2, the search starting offset of each PDCCH search space in at least one PDCCH search space.
Similarly, in the embodiment of the present invention, the network device may configure, for the UE, the search start offset used for the UE to generate different PDCCH search spaces, or may configure, for the UE, the search start offset of the same PDCCH search space, so that the UE generates PDCCH search spaces with different characteristics.
And A3, a gap between two adjacent PDCCH candidate sets in each PDCCH search space in at least one PDCCH search space.
As above, in the embodiment of the present invention, the network device may configure, for the UE, gaps between candidate sets used for the UE to generate different PDCCH search spaces (hereinafter, the gaps between two adjacent PDCCH candidate sets are all represented by gaps), or configure, for the UE, the same gaps of PDCCH search spaces, so that the UE generates PDCCH search spaces with different characteristics.
For specific descriptions of the search direction of the PDCCH search space, the search start offset of the PDCCH search space, and the gap between two adjacent PDCCH candidate sets in each PDCCH search space, reference may be made to the descriptions of these three information in the introduction of the concept of the above embodiment, and details are not repeated here.
S102, the network equipment sends PDCCH resource configuration information and PDCCH search space configuration information to the UE.
In the embodiment of the present invention, the network device may send the PDCCH resource configuration information and the PDCCH search space configuration information generated by the network device to the UE, so that the UE generates at least one search space for the UE to perform blind detection on the PDCCH according to the PDCCH resource configuration information and the PDCCH search space configuration information.
Optionally, the network device sends the PDCCH resource configuration information to the UE through minimum system information, a system information block, a radio resource control signaling, a media access control layer control signaling, or a common group PDCCH message.
S103, the UE receives PDCCH resource configuration information and PDCCH search space configuration information sent by the network equipment.
In the embodiment of the invention, the UE can receive minimum system information, a system information block, a radio resource control signaling, a media access control layer control signaling or a public group PDCCH message sent by network equipment, and then obtain PDCCH resource configuration information and PDCCH search space configuration information from the minimum system information, the system information block, the radio resource control signaling, the media access control layer control signaling or the public group PDCCH message.
S104, the UE generates at least one PDCCH search space according to the PDCCH resource configuration information and the PDCCH search space configuration information.
Specifically, S104 may be implemented by S104a to S104 b:
s104a, the UE determines the number of CCEs configured for the UE by the network equipment according to the PDCCH resource configuration information, and numbers all the CCEs.
In the embodiment of the invention, the UE can determine the number of CCEs configured for the UE by the network equipment according to the time-frequency resource indicated by the PDCCH resource configuration information sent by the network equipment. Specifically, the UE may determine the number of Resource Element Groups (REGs) according to the number of PRBs configured by the network device and the number of OFDM symbols, and then determine the number of CCEs according to the number of REGs.
For example, assuming that the number of PRBs configured by the network device is 12 and the number of OFDM symbols is 2, the number of REGs is the product of the number of PRBs and the number of OFDM symbols, i.e., the number of REGs is 24, and assuming that one CCE includes 6 REGs, the number of CCEs is determined to be 4 by the number of REGs.
After the UE determines the number of CCEs, the UE may identify all CCE numbers configured for the network device, and assuming that the number of CCEs determined by the UE is N, the UE may identify the N CCEs as CCE0, CCE1, …, and CCE N-1, such as N =8, where the 8 CCE numbers are CCEO, CCE1, CCE2, CCE3, CCE4, CCE5, CCE6, and CCE7.
S104b, the UE generates at least one PDCCH search space according to all numbered CCEs, the first configuration information and the second configuration information.
In the embodiment of the invention, because the first configuration information comprises the aggregation level of CCEs and the number of PDCCH candidate sets, the UE can determine the configured PDCCH search space type and the number of CCEs aggregated in each PDCCH candidate set according to the aggregation level of the CCEs; the UE may determine how many PDCCH candidate sets are included in each PDCCH search space according to the number of PDCCH candidate sets.
Exemplarily, assuming that in the first configuration information, the CCE aggregation level is 2,4, the number of PDCCH candidate sets corresponding to aggregation level 2 is 5, and the number of PDCCH candidate sets corresponding to aggregation level 4 is 4, the UE may generate two PDCCH search spaces, a first PDCCH search space including 5 PDCCH candidate sets of aggregation level 2 and a second PDCCH search space including 4 PDCCH candidate sets of aggregation level 4.
Further, after the UE learns the basic situation of the at least one PDCCH search space according to the PDCCH resource configuration information and the first configuration information, the UE may accurately generate the at least one PDCCH search space according to the second configuration information. For example, at least one PDCCH search space is generated according to the search direction indicated by the second configuration information, the search start offset, and the gap between PDCCH candidate sets.
It should be noted that the UE may generate a plurality of different search spaces by using the above method, and when the PDCCH resource configuration information is different from the PDCCH search space configuration information, different search spaces may be generated, and specifically, according to an actual requirement, the network device may configure the PDCCH resource configuration information and the PDCCH search space configuration information that are responded to the UE, so that the UE generates PDCCH search spaces that may achieve different technical effects. The PDCCH search spaces generated by the UE are described below in several examples.
In the following examples, the number of CCEs is 28 as an example. A search space with an aggregation level of 8 is recorded as a first search space, a search space with an aggregation level of 4 is recorded as a second search space, a search space with an aggregation level of 2 is recorded as a third search space, and a search space with an aggregation level of 1 is recorded as a fourth search space.
Example 1: the configuration information is shown in table 2 below:
TABLE 2
Grade of polymerization PDCCH candidate set number Gap between the two plates
8 1 0
4 2 0
2 4 0
1 4 0
In table 2, other configuration information not listed, such as the search direction, defaults to the direction from the small CCE index to the large CCE index (i.e., the search direction is 0), and defaults to the search start offset 0.
In the embodiment of the present invention, as shown in fig. 5, for a schematic diagram of a PDCCH search space generated according to the configuration information in table 2, it can be known that setting gaps between PDCCH candidate sets in each search space to 0 enables a PDCCH search space with a high aggregation level to cover a PDCCH search space with a low aggregation level, for example, in fig. 5, a search space 1 covers a search space 2, a search space 3, and a search space 4, so that after a blind test is performed on a search space with a high aggregation level, when the search space with a low aggregation level is subjected to a blind test, a channel estimation result under the blind test in the search space with the high aggregation level may be multiplexed without performing channel estimation, thereby reducing the complexity of the PDCCH for the blind test.
Example 2: the configuration information is shown in table 3 below:
TABLE 3
Figure BDA0001377198530000151
Figure BDA0001377198530000161
In the embodiment of the present invention, as shown in fig. 6, which is a schematic diagram of PDCCH search spaces generated according to the configuration information in table 3, it can be known that, when gaps between PDCCH candidate sets in each search space are set to different values, each PDCCH search space can be allocated on different resources, so that a blocking rate of resource allocation can be reduced, and meanwhile, it can be known that a PDCCH search space with a high aggregation level covers a PDCCH search space with a low aggregation level, and complexity of blind detection of a PDCCH can be reduced.
Example 3: the configuration information is shown in table 4 below:
TABLE 4
Grade of polymerization PDCCH candidate set number Gap Search direction Search start offset
8 1 / 1 2
4 2 0 1 2
2 2 2 1 2
1 2 3 1 3
In the embodiment of the present invention, as shown in fig. 7, which is a schematic diagram of a PDCCH search space generated according to the configuration information in table 4, it is known that different effects can be achieved by configuring each configuration information, for example, adjusting the search direction can fully utilize CCE resources configured by a network device, as shown in fig. 6, when the search direction is 0, a PDCCH candidate set with an aggregation level of 4 cannot be formed for CCEs 22 to 25, that is, resources of these CCEs cannot be used, and when the search direction is 1 in fig. 7, CCEs 22 to 25 can form a PDCCH candidate set with an aggregation level of 4, so CCE resources can be fully utilized. In addition, different search directions can be configured to search for the gap between the starting offset and the PDCCH candidate set, so that each PDCCH search space can be allocated on different resources, and thus, the blocking rate of resource allocation can be reduced.
Example 4: the configuration information is shown in table 5 below:
TABLE 5
Grade of polymerisation Number of PDCCH candidate sets Gap between the two plates Search start offset
8 1 / 16
4 2 4 8
2 4 4 4
1 4 5 4
In the embodiment of the present invention, as shown in fig. 8, which is a schematic diagram of a PDCCH search space generated according to the configuration information in table 5, it is known that by configuring each configuration information (the default search direction is 0), each PDCCH search space can be allocated on different resources, so that the blocking rate of resource allocation can be reduced.
Example 5:
in the embodiment of the present invention, for different UEs, for example, UEs in different beam directions, for example, UE1 is in a beam 1 direction, UE2 is in a beam 2 direction, a synchronization signal block received by UE1 in the beam 1 direction is sync signal block 1, and a synchronization signal block received by UE2 in the beam 2 direction is sync signal block 2, so that the second configuration information can be obtained according to an association relationship between an identifier of the synchronization signal block and the second configuration information, taking the second configuration information as a search start offset as an example, as shown in fig. 9, a search start offset corresponding to UE1 can be obtained according to synchronization signal block 1 and is 0, a search start offset corresponding to UE2 is obtained according to synchronization signal block 2 and is 10, and thus, in combination with other configuration information, respective search spaces of UE1 and UE2 can be generated.
In the embodiment of the present invention, table 6 is configuration information of a PDCCH search space corresponding to UE1, and table 7 is configuration information of a PDCCH search space corresponding to UE1, where a gap between default PDCCH candidate sets in tables 6 and 7 is 0.
TABLE 6
Grade of polymerization PDCCH candidate set number Search start offset
8 1 0
4 2 0
2 4 0
TABLE 7
Grade of polymerization PDCCH candidate setNumber of Search start offset
8 1 10
4 2 10
2 4 10
Optionally, in the embodiment of the present invention, the network device may configure, for multiple UEs, a PDCCH search space for the multiple UEs to generate, for example, different UE may be configured with different search directions, search starting point offsets, or gaps between PDCCH candidate sets, so that the search spaces of different UEs are not overlapped as much as possible, resource overlapping may be avoided, resource allocation is uniform as much as possible, and not only may the utilization rate of resources be improved, but also the blocking rate of resource allocation may be reduced.
Optionally, the method for determining a PDCCH search space provided in the embodiment of the present invention may further include S105:
s105, the network equipment generates at least one PDCCH search space according to the PDCCH resource configuration information and the PDCCH search space configuration information.
In the embodiment of the present invention, the network device generates at least one PDCCH search space according to the PDCCH resource configuration information and PDCCH search space configuration information generated by the network device, where the at least one PDCCH search space is the same as the at least one PDCCH search space generated by the UE.
For the method for generating at least one PDCCH search space by the network device, reference may be made to the method for generating at least one PDCCH search space by the UE, which is not described herein again.
It should be noted that, in the embodiment of the present invention, the execution sequence of S102 to S104 and S105 may not be limited, that is, S102 to S104 may be executed first and S105 may be executed later, S105 may be executed first and S102 to S104 may be executed later, or S102 to S104 and S105 may be executed simultaneously.
S106, the network equipment transmits the PDCCH to the UE in at least one PDCCH candidate set in at least one PDCCH search space generated by the network equipment.
S107, the UE receives the PDCCH sent by the network equipment.
S108, the UE blindly detects the PDCCH in at least one PDDCH search space generated by the UE.
In the embodiment of the present invention, after the network device generates at least one PDCCH search space, the network device may send PDCCHs to the UE in a part or all of the PDCCH search spaces, and after the UE receives the PDCCH sent by the network device, the UE may perform blind detection on the PDCCH in the at least one PDCCH search space generated by the UE, so that the UE may determine a state of the PDCCH.
In the method for determining a PDCCH search space provided in the embodiments of the present invention, a network device may generate PDCCH resource configuration information and PDCCH search space configuration information (including the first configuration information and the second configuration information), and send the PDCCH resource configuration information and PDCCH search space configuration information to a UE, so that the UE may generate at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information, and the second configuration information.
Scene two
In conjunction with the wireless communication system shown in fig. 1, as shown in fig. 10, an embodiment of the present invention provides a method for determining a PDCCH search space, where the method may include S201 to S205:
s201, the network equipment generates PDCCH resource configuration information and first configuration information.
S202, the network equipment sends the PDCCH resource configuration information and the first configuration information to the UE.
S203, the UE receives the PDCCH resource configuration information and the first configuration information sent by the network equipment.
In the embodiment of the present invention, because part of the contents in S201 to S203 are similar to those in S101 to S103, for the relevant description of S201 to S203, reference may be specifically made to the relevant description of S101 to S103 in scenario one, and details are not repeated here.
S204, the UE acquires the second configuration information.
In this embodiment of the present invention, the second configuration information may be predefined or associated with at least one of the following: the identity of the UE, time information (e.g., subframe, slot, or OFDM symbol information) of the communication system in which the UE is located, and the identity of the synchronization signal block received by the UE. As such, the UE may determine the second configuration information (i.e., search direction, search start offset, or gap of PDCCH candidate set) according to a configuration predefined by the protocol; the UE may also determine the second configuration information (i.e., the search direction, the search start offset, or the gap of the PDCCH candidate set) according to the association between the UE identifier and the second configuration information; the UE may also determine the second configuration information according to an association relationship between time information of a communication system in which the UE is located and the second configuration information; the UE may also determine the second configuration information according to an association relationship between the identifier of the synchronization signal block received by the UE and the second configuration information.
The association relationship between the identifier of the UE and the second configuration information may be an association relationship set according to an actual requirement, and similarly, the association relationship between the time information of the communication system where the UE is located and the second configuration information may also be an association relationship set according to an actual requirement, and the association relationship between the identifier of the synchronization signal block received by the UE and the second configuration information may also be an association relationship set according to an actual requirement, which is not limited in the embodiment of the present invention.
S205, the UE generates at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information and the second configuration information.
For a specific description of S205, refer to the foregoing embodiment, and for a related description of S104, details are not repeated here.
Optionally, in the embodiment of the present invention, in a case that the second configuration information is determined by the UE, the second configuration information may be determined in a manner (for example, protocol agreement) that the network device and the UE agree in advance, so that the network device may also obtain the second configuration information, and thus the network device may also generate at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information, and the second configuration information.
It should be noted that, in the embodiment of the present invention, in the scene two, the steps S105 to S108 described in the scene one may also be executed, which is not described herein again.
The PDCCH resource configuration information is configured by the network equipment, the first configuration information is configured by the network equipment, and the second configuration information is determined by the UE.
In the method for determining a PDCCH search space provided in the embodiments of the present invention, a network device may generate PDCCH resource configuration information and first configuration information, and send the PDCCH resource configuration information and the first configuration information to a UE, and the UE may obtain second configuration information, and generate at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information, and the second configuration information, so that the UE can perform blind detection on a PDCCH in the at least one PDCCH search space, thereby solving a problem that blind detection on the PDCCH cannot be performed by using a search space in the prior art.
Scene three
In conjunction with the wireless communication system shown in fig. 1, as shown in fig. 11, an embodiment of the present invention provides a method for determining a PDCCH search space, where the method may include S301 to S305:
s301, the network equipment generates PDCCH resource configuration information.
S302, the network equipment sends PDCCH resource configuration information to the UE.
S303, the UE receives the PDCCH resource configuration information sent by the network equipment.
S304, the UE acquires the first configuration information and the second configuration information.
In this embodiment of the present invention, the first configuration information may be predefined or associated with at least one of the following: the identity of the UE, the time information of the communication system where the UE is located, and the identity of the synchronization signal block received by the UE. As such, the UE may determine the first configuration information according to the association relationship.
For the method for the UE to obtain the second configuration information, refer to S204 in the above scenario two, which is not described herein again.
S305, the UE generates at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information and the second configuration information.
For a specific description of S305, refer to the foregoing embodiment, and for a related description of S104, details are not repeated here.
In the same scenario, optionally, in the embodiment of the present invention, under the condition that the first configuration information and the second configuration information are determined by the UE, the first configuration information and the second configuration information may be determined in a manner (for example, protocol agreement) that is agreed by the network device and the UE in advance, so that the network device may also obtain the first configuration information and the second configuration information, and thus the network device may also generate at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information, and the second configuration information. S105 to S108 described in the first scenario may also be executed, which is not described herein again.
In the method for determining a PDCCH search space provided in the embodiments of the present invention, a network device may generate PDCCH resource configuration information and send the PDCCH resource configuration information to a UE, and the UE may obtain first configuration information and second configuration information and generate at least one PDCCH search space according to the PDCCH resource configuration information, the first configuration information, and the second configuration information, so that the UE can perform blind detection on a PDCCH in the at least one PDCCH search space, thereby solving a problem that blind detection on the PDCCH cannot be performed by using a search space in the prior art.
Optionally, in the first scenario, the second scenario, and the third scenario, after the UE accesses the network, in a process of blind detection of the PDCCH, the UE may send capability information of the UE blind detection of the PDCCH to the network device, where the capability information of the UE blind detection of the PDCCH is used to indicate capability of the UE for blind detection of the PDCCH, the network device receives the capability information of the PDCCH sent by the UE, and the network device may update PDCCH resource configuration information and/or PDCCH search space configuration information according to the capability information of the PDCCH for blind detection of the UE, so that the UE generates a PDCCH search space with better performance.
The above-mentioned scheme provided by the embodiment of the present invention is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, such as a network device, UE, etc., for implementing the above functions, includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
According to the method example, the network device, the UE, and the like may be divided into functional modules, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of adopting the functional modules divided for the respective functions, fig. 12 shows a schematic diagram of a possible structure of the UE involved in the foregoing embodiment, as shown in fig. 12, the UE may include: an acquisition module 40 and a generation module 41. Wherein:
an obtaining module 40, configured to obtain PDCCH resource configuration information and PDCCH search space configuration information, where the PDCCH resource configuration information is used to indicate a time-frequency resource of a PDCCH configured by a network device for a UE, and the PDCCH search space configuration information includes at least one of first configuration information and second configuration information.
Wherein the first configuration information includes an aggregation level of Control Channel Elements (CCEs) of each of the at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space.
The second configuration information includes at least one of a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets adjacent in each PDCCH search space in the at least one PDCCH search space.
A generating module 41, configured to generate at least one PDCCH search space according to the PDCCH resource configuration and PDCCH search space configuration information acquired by the acquiring module 40, where the at least one PDCCH search space is used for the UE to blind-detect a PDCCH.
Optionally, the obtaining module 40 is specifically configured to receive PDCCH resource configuration information, first configuration information, and second configuration information sent by the network device.
Optionally, the UE provided in the embodiment of the present invention further includes a determining module. Wherein:
the obtaining module 40 is specifically configured to receive PDCCH resource configuration information and first configuration information sent by a network device.
A determining module for determining the second configuration information.
Optionally, the obtaining module 40 is specifically configured to receive PDCCH resource configuration information sent by the network device.
The determining module is configured to determine the first configuration information and the second configuration information.
Optionally, the determining module is specifically configured to determine second configuration information according to a predefined configuration of a protocol; or, determining the second configuration information according to at least one of:
an identity of the UE;
time information of a communication system in which the UE is located;
identification of synchronization signal blocks received by the UE.
Optionally, the generating module 41 is specifically configured to determine, according to the PDCCH resource configuration information, the number of CCEs configured by the network device for the UE, number all CCEs, and generate at least one PDCCH search space according to all numbered CCEs, the first configuration information, and the second configuration information.
Optionally, the UE provided in the embodiment of the present invention further includes a sending module.
And the sending module is used for sending the capability information of the UE blind detection PDCCH to the network equipment, and the capability information of the UE blind detection PDCCH is used for indicating the capability of the UE blind detection PDCCH.
Optionally, the UE provided in the embodiment of the present invention further includes a receiving module and a blind detection module. Wherein:
and the receiving module is used for receiving the PDCCH sent by the network equipment.
And the blind detection module is used for blind detecting the PDCCH received by the receiving module in at least one PDCCH search space.
An embodiment of the present invention further provides a UE, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above method for determining a PDCCH search space, and can achieve the same technical effect, and is not described herein again to avoid repetition.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process of the above method for determining a PDCCH search space, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
In an integrated unit, an embodiment of the present invention further provides a network device, and fig. 13 is a structural diagram of a network device applied in an embodiment of the present invention, which can implement details of an information determining method provided in the foregoing method embodiment and achieve the same effect. As shown in fig. 13, the network device includes a generation module 50 and a transmission module 51. Wherein:
a generating module 50, configured to generate PDCCH resource configuration information, where the PDCCH resource configuration information is used to indicate time-frequency resources of a PDCCH configured by the network device for the UE.
A sending module 51, configured to send the PDCCH resource configuration information generated by the generating module 50 to the UE.
Optionally, the generating module 50 is further configured to generate PDCCH search space configuration information, where the PDCCH search space configuration information includes at least one of the first configuration information and the second configuration information.
Wherein the first configuration information includes an aggregation level of Control Channel Elements (CCEs) of each of the at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space.
The second configuration information includes at least one of a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets that are adjacent in each PDCCH search space in the at least one PDCCH search space.
Optionally, the sending module 51 is further configured to send the PDCCH search space configuration information to the UE after the generating module 50 generates the PDCCH search space configuration information.
Optionally, the network device provided in the embodiment of the present invention further includes a receiving module and an updating module. Wherein:
the receiving module is used for receiving the capability information of the UE blind test PDCCH sent by the UE, and the capability information of the UE blind test PDCCH is used for indicating the capability of the UE blind test PDCCH.
And the updating module updates PDCCH resource configuration information and/or PDCCH search space configuration information according to the capability information of the PDCCH of the UE in the blind detection.
Optionally, the generating module 50 is further configured to generate at least one PDCCH search space according to the PDCCH resource configuration information and the PDCCH search space configuration information.
A transmitting module 51, further configured to transmit PDCCH to the UE in at least one PDCCH candidate set in at least one PDCCH search space.
An embodiment of the present invention further provides a network device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above method for determining a PDCCH search space, and can achieve the same technical effect, and is not described herein again to avoid repetition.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process of the above method for determining a PDCCH search space, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer readable storage medium is ROM, RAM, magnetic disk or optical disk.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims (29)

1. A method for determining a PDCCH search space, which is applied to a User Equipment (UE), is characterized in that,
acquiring PDCCH resource configuration information and PDCCH search space configuration information of a downlink control channel, wherein the PDCCH resource configuration information is used for indicating time-frequency resources of a PDCCH configured for the UE by network equipment, and the PDCCH search space configuration information comprises first configuration information and second configuration information;
wherein the first configuration information comprises an aggregation level of Control Channel Elements (CCEs) of each of at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space;
the second configuration information includes a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets adjacent to each other in each PDCCH search space in the at least one PDCCH search space, where the gap is a gap between control channel elements in the search spaces;
and generating at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information, wherein the at least one PDCCH search space is used for the UE to perform blind detection on the PDCCH.
2. The method of claim 1, wherein the obtaining, by the UE, PDCCH resource configuration information and PDCCH search space configuration information comprises:
receiving the PDCCH resource configuration information, the first configuration information and the second configuration information sent by the network device;
or the like, or, alternatively,
receiving the PDCCH resource configuration information and the first configuration information sent by the network equipment, and determining the second configuration information;
or the like, or, alternatively,
receiving the PDCCH resource configuration information sent by the network equipment, and determining the first configuration information and the second configuration information.
3. The method according to claim 1 or 2,
the determining the second configuration information includes:
determining the second configuration information according to a configuration predefined by a protocol; or
Determining the second configuration information according to at least one of:
an identity of the UE;
time information of a communication system in which the UE is located;
an identification of a synchronization signal block received by the UE.
4. The method of claim 3, wherein the UE generates at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information, and comprises:
determining the number of CCEs configured for the UE by the network equipment according to the PDCCH resource configuration information, and numbering all the CCEs;
generating the at least one PDCCH search space according to all numbered CCEs, the first configuration information and the second configuration information.
5. The method of claim 4, further comprising:
and sending the capability information of the UE blind test PDCCH to the network equipment, wherein the capability information of the UE blind test PDCCH is used for indicating the capability of the UE blind test PDCCH.
6. The method of claim 5, wherein after the generating at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information, the method further comprises:
receiving a PDCCH sent by the network equipment;
blind detecting the PDCCH in the at least one PDCCH search space.
7. The method of claim 6, wherein the obtaining the PDCCH resource configuration information and the PDCCH search space configuration information comprises:
receiving minimum system information, a system information block, a radio resource control signaling, a media access control layer control signaling or a public group PDCCH message sent by the network equipment;
obtaining the PDCCH resource configuration information and the PDCCH search space configuration information from the minimum system information, the system information block, the radio resource control signaling, the media access control layer control signaling, or the common group PDCCH message.
8. A method for determining a PDCCH search space, applied to a network device,
generating PDCCH resource configuration information, wherein the PDCCH resource configuration information is used for indicating time-frequency resources of a PDCCH configured for User Equipment (UE) by the network equipment;
transmitting the PDCCH resource configuration information to the UE;
the method further comprises the following steps:
generating PDCCH search space configuration information, wherein the PDCCH search space configuration information comprises first configuration information and second configuration information;
wherein the first configuration information comprises an aggregation level of Control Channel Elements (CCEs) of each of at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space;
the second configuration information includes a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets adjacent to each other in each PDCCH search space in the at least one PDCCH search space, where the gap is an interval between control channel elements in the search space.
9. The method of claim 8, wherein after the generating the PDCCH search space configuration information, the method further comprises:
and sending the PDCCH search space configuration information to the UE.
10. The method of claim 9, further comprising:
receiving capability information of a UE blind test PDCCH sent by the UE, wherein the capability information of the UE blind test PDCCH is used for indicating the capability of the UE blind test PDCCH;
and updating the PDCCH resource configuration information and/or the PDCCH searching space configuration information according to the capability information of the UE for blind detection of the PDCCH.
11. The method of claim 10, further comprising:
generating at least one PDCCH search space according to the PDCCH resource configuration information and the PDCCH search space configuration information;
transmitting PDCCH to the UE in at least one PDCCH candidate set in the at least one PDCCH search space.
12. The method of claim 11, wherein the sending the PDCCH resource configuration information to the UE comprises:
and sending the PDCCH resource configuration information to the UE through minimum system information, a system information block, a radio resource control signaling, a media access control layer control signaling or a public group PDCCH message.
13. The UE is characterized by comprising an acquisition module and a generation module;
the obtaining module is configured to obtain PDCCH resource configuration information of a downlink control channel and PDCCH search space configuration information, where the PDCCH resource configuration information is used to indicate time-frequency resources of a PDCCH configured for the UE by a network device, and the PDCCH search space configuration information includes first configuration information and second configuration information;
wherein the first configuration information comprises an aggregation level of Control Channel Elements (CCEs) of each of at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space;
the second configuration information includes a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets adjacent to each other in each PDCCH search space in the at least one PDCCH search space, where the gap is a gap between control channel elements in the search spaces;
the generating module is configured to generate at least one PDCCH search space according to the PDCCH resource configuration and the PDCCH search space configuration information acquired by the acquiring module, where the at least one PDCCH search space is used for the UE to perform blind detection on the PDCCH.
14. The UE of claim 13,
the obtaining module is specifically configured to receive the PDCCH resource configuration information, the first configuration information, and the second configuration information sent by the network device;
or, the UE further comprises a determining module;
the obtaining module is specifically configured to receive the PDCCH resource configuration information and the first configuration information sent by the network device;
the determining module is used for determining second configuration information;
or, the UE further comprises a determining module;
the obtaining module is specifically configured to receive the PDCCH resource configuration information sent by the network device,
the determining module is configured to determine the first configuration information and the second configuration information.
15. The UE of claim 13 or 14, wherein the UE further comprises a determination module;
the determining module is used for determining the second configuration information according to the configuration predefined by the protocol; or
Determining the second configuration information based on at least one of:
an identity of the UE;
time information of a communication system in which the UE is located;
an identification of a synchronization signal block received by the UE.
16. The UE of claim 15,
the generating module is specifically configured to determine, according to the PDCCH resource configuration information, the number of CCEs configured by the network device for the UE, number all CCEs, and generate the at least one PDCCH search space according to all numbered CCEs, the first configuration information, and the second configuration information.
17. The UE of claim 16, further comprising a transmitting module;
the sending module is configured to send capability information of the UE blind test PDCCH to the network device, where the capability information of the UE blind test PDCCH is used to indicate the capability of the UE blind test PDCCH.
18. The UE of claim 17, further comprising a receiving module and a blind detection module;
the receiving module is configured to receive the PDCCH sent by the network device;
the blind detection module is configured to blind detect the PDCCH received by the receiving module in the at least one PDCCH search space.
19. The UE of claim 18,
the acquiring module is specifically configured to receive minimum system information, a system information block, a radio resource control signaling, a media access control layer control signaling, or a public group PDCCH message sent by the network device; and acquiring the PDCCH resource configuration information and the PDCCH search space configuration information from the minimum system information, the system information block, the radio resource control signaling, the media access control layer control signaling, or the common group PDCCH message.
20. The network equipment is characterized by comprising a generating module and a sending module;
the generation module is configured to generate PDCCH resource configuration information, where the PDCCH resource configuration information is used to indicate time-frequency resources of a PDCCH configured by the network device for the user equipment UE;
the sending module is configured to send the PDCCH resource configuration information generated by the generating module to the UE;
the generating module is further configured to generate PDCCH search space configuration information, where the PDCCH search space configuration information includes first configuration information and second configuration information;
wherein the first configuration information comprises an aggregation level of Control Channel Elements (CCEs) of each of at least one PDCCH search space and a number of PDCCH candidate sets of each of the at least one PDCCH search space;
the second configuration information includes a search direction of each PDCCH search space in the at least one PDCCH search space, a search start offset of each PDCCH search space in the at least one PDCCH search space, and a gap between two PDCCH candidate sets adjacent to each other in each PDCCH search space in the at least one PDCCH search space, where the gap is an interval between control channel elements in the search space.
21. The network device of claim 20,
the sending module is further configured to send the PDCCH search space configuration information to the UE after the generating module generates the PDCCH search space configuration information.
22. The network device of claim 21, wherein the network device further comprises a receiving module and an updating module;
the receiving module is configured to receive capability information of a UE blind test PDCCH sent by the UE, where the capability information of the UE blind test PDCCH is used to indicate a capability of the UE blind test PDCCH;
and the updating module is used for updating the PDCCH resource configuration information and/or the PDCCH searching space configuration information according to the capability information of the UE blind detection PDCCH.
23. The network device of claim 22,
the generating module is further configured to generate at least one PDCCH search space according to the PDCCH resource configuration information and the PDCCH search space configuration information;
the transmitting module is further configured to transmit a PDCCH to the UE in at least one PDCCH candidate set in the at least one PDCCH search space.
24. The network device of claim 22,
the sending module is specifically configured to send the PDCCH resource configuration information to the UE through minimum system information, a system information block, a radio resource control signaling, a media access control layer control signaling, or a public group PDCCH message.
25. A User Equipment (UE), the UE comprising: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the method of determining a PDCCH search space according to any of claims 1 to 7.
26. A network device, characterized in that the network device comprises: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the method of determining a PDCCH search space according to any of claims 8 to 12.
27. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements a method of determining a PDCCH search space according to any of claims 1 to 7.
28. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the method of determining a PDCCH search space according to any of the claims 8 to 12.
29. A wireless communication system, comprising a user equipment, UE, according to any of claims 13 to 19 or claim 25 and a network device according to any of claims 20 to 24 or claim 26.
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