CN116981064A - Method, device, equipment and storage medium for decoding PDCCH - Google Patents

Method, device, equipment and storage medium for decoding PDCCH Download PDF

Info

Publication number
CN116981064A
CN116981064A CN202210415135.9A CN202210415135A CN116981064A CN 116981064 A CN116981064 A CN 116981064A CN 202210415135 A CN202210415135 A CN 202210415135A CN 116981064 A CN116981064 A CN 116981064A
Authority
CN
China
Prior art keywords
frequency domain
resource set
control resource
determining
starting position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210415135.9A
Other languages
Chinese (zh)
Inventor
赵思聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spreadtrum Communications Shanghai Co Ltd
Original Assignee
Spreadtrum Communications Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spreadtrum Communications Shanghai Co Ltd filed Critical Spreadtrum Communications Shanghai Co Ltd
Priority to CN202210415135.9A priority Critical patent/CN116981064A/en
Priority to PCT/CN2023/089123 priority patent/WO2023202598A1/en
Publication of CN116981064A publication Critical patent/CN116981064A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application provides a method, a device, equipment and a storage medium for decoding PDCCH, wherein terminal equipment firstly determines a control resource set, and the frequency domain bandwidth occupied by the control resource set is smaller than or equal to a preset frequency domain bandwidth; the PDCCH is then decoded according to the control resource set. The frequency domain bandwidth occupied by the control resource set provided by the embodiment of the application is smaller than 5MHz, and when the NR network is deployed on the special frequency domain resource with the bandwidth smaller than 5MHz, the terminal equipment can receive the complete control resource set, and then the PDCCH can be decoded, so that the terminal equipment can be accessed to the NR network.

Description

Method, device, equipment and storage medium for decoding PDCCH
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a storage medium for decoding a PDCCH.
Background
With the continuous evolution of communication networks, new air interface (NR) networks have a requirement of being deployed in dedicated frequency domain resources with bandwidth less than 5 MHz.
In the related art, the control resource set includes at least 24 resource blocks in the frequency domain, that is, at least approximately 5MHz (4.32 MHz) is required for the control resource set to occupy a bandwidth of 15KHz subcarrier spacing. If the NR network is to be deployed on a dedicated frequency domain resource with a bandwidth less than 5MHz, for example, 3MHz/3.6MHz, the terminal device cannot receive the complete control resource set, and further cannot decode the physical downlink control channel (Physical Downlink Control Channel, PDCCH), which results in that the terminal device cannot access the NR network.
Disclosure of Invention
The embodiment of the application provides a method, a device, equipment and a storage medium for decoding PDCCH, which enable terminal equipment to access an NR network deployed on a special frequency domain resource with the bandwidth less than 5 MHz.
In a first aspect, an embodiment of the present application provides a method for decoding a PDCCH, including:
determining a control resource set, wherein the frequency domain bandwidth occupied by the control resource set is smaller than or equal to a preset frequency domain bandwidth;
and decoding the physical downlink control channel PDCCH according to the control resource set.
In one possible implementation, the preset frequency domain bandwidth is less than or equal to 5M.
In one possible implementation, determining the set of control resources includes:
acquiring configuration information of the control resource set;
and determining the control resource set according to the configuration information.
In a possible implementation manner, the configuration information includes at least one of the following:
the number of resource blocks;
offset values of the first frequency domain starting position of the control resource set relative to the second frequency domain starting position of the synchronous signal block-common resource block SSB-CRB;
number of orthogonal frequency division multiplexing OFDM symbols.
In one possible implementation, the number of resource blocks is less than or equal to a preset number, which is less than or equal to 18.
In one possible embodiment, the offset value is a value between a first value less than 0 and a second value greater than 0.
In one possible implementation, the number of OFDM symbols is less than or equal to a preset value, which is less than or equal to 8.
In a possible implementation manner, determining the control resource set according to the configuration information includes:
determining the frequency domain resource of the control resource set according to the number of the resource blocks and the offset value;
determining time domain resources of the control resource set according to the OFDM symbol number;
and determining the control resource set according to the frequency domain resource and the time domain resource.
In a possible implementation manner, determining the frequency domain resource of the control resource set according to the number of resource blocks and the offset value includes:
acquiring the second frequency domain initial position;
determining the first frequency domain starting position according to the second frequency domain starting position and the offset value;
and determining the frequency domain resources of the control resource set according to the first frequency domain starting position and the number of the resource blocks.
In a possible implementation manner, acquiring the second frequency domain starting position includes:
acquiring a synchronous signal block SSB;
and determining the second frequency domain starting position according to the SSB.
In a possible implementation manner, a frequency domain starting position of the preset common resource block is the same as the first frequency domain starting position.
In a second aspect, an embodiment of the present application provides an apparatus for decoding a PDCCH, including a determining module and a decoding module, where,
the determining module is used for determining a control resource set, and the frequency domain bandwidth occupied by the control resource set is smaller than or equal to a preset frequency domain bandwidth;
the decoding module is configured to decode a physical downlink control channel PDCCH according to the control resource set.
In one possible implementation, the preset frequency domain bandwidth is less than or equal to 5M.
In one possible implementation manner, the determining module is specifically configured to:
acquiring configuration information of the control resource set;
and determining the control resource set according to the configuration information.
In a possible implementation manner, the configuration information includes at least one of the following:
the number of resource blocks;
offset values of the first frequency domain starting position of the control resource set relative to the second frequency domain starting position of the synchronous signal block-common resource block SSB-CRB;
number of orthogonal frequency division multiplexing OFDM symbols.
In one possible implementation, the number of resource blocks is less than or equal to a preset number, which is less than or equal to 18.
In one possible embodiment, the offset value is a value between a first value less than 0 and a second value greater than 0.
In one possible implementation, the number of OFDM symbols is less than or equal to a preset value, which is less than or equal to 8.
In one possible implementation manner, the determining module is specifically configured to:
determining the frequency domain resource of the control resource set according to the number of the resource blocks and the offset value;
determining time domain resources of the control resource set according to the OFDM symbol number;
and determining the control resource set according to the frequency domain resource and the time domain resource.
In one possible implementation manner, the determining module is specifically configured to:
acquiring the second frequency domain initial position;
determining the first frequency domain starting position according to the second frequency domain starting position and the offset value;
and determining the frequency domain resources of the control resource set according to the first frequency domain starting position and the number of the resource blocks.
In one possible implementation manner, the determining module is specifically configured to:
acquiring a synchronous signal block SSB;
and determining the second frequency domain starting position according to the SSB.
In a possible implementation manner, a frequency domain starting position of the preset common resource block is the same as the first frequency domain starting position.
In a third aspect, an embodiment of the present application provides an apparatus for decoding PDCCH, including a processor and a memory;
the memory stores computer-executable instructions;
the processor executing computer-executable instructions stored in the memory causes the processor to perform the method of decoding PDCCH as described in any of the first aspects.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the method of decoding a PDCCH of any of the first aspects when the computer-executable instructions are executed by a processor.
In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which when executed by a processor, implements a method for decoding PDCCH according to any of the first aspects.
The embodiment of the application provides a method, a device, equipment and a storage medium for decoding PDCCH, wherein terminal equipment firstly determines a control resource set, and the frequency domain bandwidth occupied by the control resource set is smaller than or equal to a preset frequency domain bandwidth; the PDCCH is then decoded according to the control resource set. The frequency domain bandwidth occupied by the control resource set provided by the embodiment of the application is smaller than 5MHz, and when the NR network is deployed on the special frequency domain resource with the bandwidth smaller than 5MHz, the terminal equipment can receive the complete control resource set, and then the PDCCH can be decoded, so that the terminal equipment can be accessed to the NR network.
Drawings
FIG. 1 is a schematic diagram of a structure of an SSB in the related art;
fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present application;
fig. 3 is a flowchart illustrating a method for decoding PDCCH according to an embodiment of the present application;
fig. 4 is a schematic diagram of a preset frequency domain resource range according to an embodiment of the present application;
FIG. 5 is a schematic flow chart of determining a control resource set according to an embodiment of the present application;
fig. 6 is a schematic diagram of a receiving manner of SSB according to an embodiment of the present application
FIG. 7 is a schematic diagram of a location of a control resource set according to an embodiment of the present application;
FIG. 8 is a schematic diagram illustrating a location of another control resource set according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of an apparatus for decoding PDCCH according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an apparatus for decoding PDCCH according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described in the following in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be understood that the terms "first," "second," and the like, as used in embodiments of the present application, are used for distinguishing between different objects and not for describing a particular sequential order.
The "network" in the embodiment of the present application may be expressed as the same concept as the "system", etc., and the communication system is the communication network. The technical scheme provided by the embodiment of the application can be applied to various communication devicesThe communication system, e.g. employing the fifth generation (5 th generation, 5G) communication technology, new Radio (NR) communication systems, future evolution systems or multiple communication convergence systems, etc.
For ease of understanding, concepts related to the embodiments of the present application will be described first.
1. Network equipment
Is a device with wireless receiving and transmitting function. Including but not limited to: base stations in NR (gNodeB or gNB) or multi-transceiver nodes (multi-Transmission and Receiving Points, M-TRP), base stations in subsequent evolved systems, access nodes in wireless fidelity (wireless fidelity, wiFi) systems, wireless relay nodes, wireless backhaul nodes, and the like. The base station may be: macro base station, micro base station, pico base station, small station, relay station, or balloon station, etc. Multiple base stations may support networks of the same technology as mentioned above, or may support networks of different technologies. A base station may contain one or more co-sited or non-co-sited TRPs.
2. Terminal equipment
Is a device with wireless receiving and transmitting function. The terminal device may be deployed on land, including indoors or outdoors, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal in industrial control (Industrial Control), a vehicle-mounted terminal device, a wireless terminal in Self Driving (Self Driving), a wireless terminal in Remote Medical (Remote Medical), a wireless terminal in Smart Grid (Smart Grid), a wireless terminal in transportation security (Transportation Safety), a wireless terminal in Smart City (Smart City), a wireless terminal in Smart Home (Smart Home), a wearable terminal device, or the like. The terminal device according to the embodiments of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote User Equipment, a mobile device, a wireless communication device, a UE agent, or a UE apparatus. The terminal device may also be fixed or mobile.
3. Synchronization signal and PBCH block (Synchronization Signal and PBCH block, SSB)
Is a new resource block in 5G NR, and its structure is shown in fig. 1, and is composed of three parts, namely a primary synchronization signal (Primary Synchronization Signals, PSS), a secondary synchronization signal (Secondary Synchronization Signals, SSS), and a physical broadcast channel (Physical Boardcast Channel, PBCH).
SSBs occupy a total of 4 orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols in the time domain, numbered 0,1,2,3, respectively. The frequency domain is processed to occupy 240 subcarriers, and the subcarrier numbers are 0-239. PSS is positioned on OFDM symbol 0, occupying 127 sub-carriers; SSS is located on OFDM symbol 2, occupying 127 subcarriers; the PBCH is positioned in OFDM symbols 1,2 and 3, wherein the PBCH on OFDM symbols 1 and 3 occupies all sub-carriers of 0-239, and the PBCH on OFDM symbol 2 occupies 48 sub-carriers; the demodulation reference signal (De-modulation Reference Signal, DMRS) is located inside the PBCH, and is a reference signal in the PBCH channel.
The first part of the PSS sequence carrying the physical cell identity (Physical Cell Identifier, PCI)SSS sequence carries the second part of PCI +.>The PBCH carries the master system information block (Master Information Block, MIB) information and some of the information bits of layer 1.
When the terminal equipment accesses the NR network, firstly blind-checking SSB on the synchronous grid, after detecting SSB, obtaining the control resource set of the scheduling system information and the configuration information of the search space by reading PBCH in the SSB. And then blindly detecting PDCCH of scheduling system information according to the configuration information.
4. System information
Consists of a MIB carried in a PBCH and a plurality of system message blocks (System Information Block, SIBs) carried in a physical downlink shared channel (Physical downlink Share Channel, PDSCH) scheduled by a corresponding PDCCH.
For a certain cell, the MIB contains reference and scheduling information of a plurality of system information blocks of the cell, for example, the MIB carries configuration information of a control resource set and a search space of the scheduling system information. The MIB messages carry the most basic information related to the decoding of the PDSCH channel, and the terminal device can use the parameters in the MIB to continue decoding the data in the PDSCH only if the MIB is decoded first.
One SIB combines system information elements with the same properties, and different SIBs may have different characteristics.
5. Control resource set (Control Resource Set, CORESET)
For representing a set of time-frequency resources carrying PDCCH. A control resource set is composed of a plurality of resource blocks in a frequency domain and a plurality of symbol numbers in a time domain.
For PDCCH-ConfigSIB1 in the MIB information, different PDCCH-ConfigSIB1 state values correspond to information of different control resource sets. The terminal equipment obtains a time-frequency range in which the PDCCH possibly appears through the PDCCH-ConfigSIB1, and detects all the positions in which the PDCCH possibly appears in a blind monitoring mode until the PDCCH is successfully decoded.
6. Physical downlink control channel
The NR system encapsulates information such as frequency bands occupied on the PDCCH frequency domain, OFDM symbol numbers occupied on the time domain and the like in CORESET; and packaging the information such as the PDCCH starting OFDM symbol number, the PDCCH monitoring period and the like in a search space. The terminal device needs to know the position of the PDCCH in the frequency domain and the time domain to successfully decode the PDCCH.
The PDCCH mainly carries downlink control information (Downlink Control Information, DCI) of PDSCH and physical uplink shared channel (Physical Uplink Share Channel, PUSCH). The terminal device needs to demodulate DCI in PDCCH first, and then can demodulate PDSCH belonging to the terminal device at a specified time-frequency resource location.
In order to facilitate understanding, an application scenario to which the embodiment of the present application is applicable is described below with reference to fig. 2.
Fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present application. Referring to fig. 2, the communication system in the application scenario includes a network device 101 and a terminal device 102. Wherein the network device 101 and the terminal device 102 may communicate through NR technology.
The terminal equipment accesses to the NR network, and needs to acquire system information, random access and other processes through cell search. The terminal obtains the information of the cell through the system information of the cell, thereby ensuring that the terminal can work correctly in the cell after accessing the cell. In the process of searching the cell, the terminal equipment needs to search SSB, and can acquire the downlink synchronization, PCI and new system information of the cell through SSB.
For a cell, the system information of the cell is valid for all terminal devices in the cell, which can be understood as the cell level. After finishing SSB decoding, the terminal equipment obtains MIB information, wherein the MIB information comprises a field PDCCH-ConfigSIB1 for indicating control information configuration parameters of the scheduling SIB1. The terminal equipment obtains the information of the SSB and the control resource set through the PDCCH-ConfigSIB1 in a table look-up mode, so that the PDCCH is decoded according to the control resource set, the PDCCH is used for scheduling the PDSCH, and the terminal equipment obtains the information indicated by the SIB1 through decoding the PDSCH.
With the continued evolution of communication networks, NR systems have a need for dedicated frequency domain resources deployed at bandwidths less than 5 MHz. Since the existing control resource set includes at least 24 resource blocks in the frequency domain, that is, the bandwidth occupied by the existing control resource set at the 15KHz subcarrier interval needs at least 5MHz (4.32 MHz), the terminal device cannot receive the complete control resource set. Because the time-frequency information of the PDCCH is randomly distributed in the resource blocks of the control resource set, if the complete control resource set cannot be received, the PDCCH cannot be decoded, and further the terminal equipment cannot access the NR network.
In view of this, the embodiment of the present application provides a new control resource set, where the bandwidth of the frequency domain occupied by the new control resource set is less than 5MHz, and when the NR network is deployed on a dedicated frequency domain resource with a bandwidth less than 5MHz, for example, 3MHz or 3.6MHz, the terminal device may receive the complete control resource set, and further may decode the PDCCH, so that the terminal device may access the NR network.
The technical scheme shown in the application is described in detail by specific examples. It should be noted that the following embodiments may exist independently or may be combined with each other, and the description will not be repeated in different embodiments for the same or displayed content.
Fig. 3 is a flowchart of a method for decoding PDCCH according to an embodiment of the present application. Referring to fig. 3, the method includes:
s301, determining a control resource set, wherein the frequency domain bandwidth occupied by the control resource set is smaller than or equal to the preset frequency domain bandwidth.
The execution body of the embodiment of the application can be a terminal device or a device for decoding the PDCCH, which is arranged in the terminal device. The means for decoding the PDCCH may be implemented by software or by a combination of software and hardware.
The control resource set may be CORESET #0.
The bandwidth of the preset frequency domain is smaller than or equal to the bandwidth of the communication system, and the bandwidth of the communication system is smaller than 5MHz and can be 3.6MHz or 3MHz.
The preset frequency domain bandwidth may be determined according to the bandwidth of the communication system and the size of the guard interval.
The guard interval may be 50 subcarriers in size.
For ease of understanding, the preset frequency domain bandwidth is described in detail below in conjunction with fig. 4.
Fig. 4 is a schematic diagram of a preset frequency domain resource range according to an embodiment of the present application. Referring to fig. 4, the preset frequency domain bandwidth is equal to the bandwidth of the communication system minus the guard interval.
S302, decoding the PDCCH according to the control resource set.
Specifically, the terminal device decodes the PDCCH according to the control resource set and the search space. The embodiment of the application only relates to the information of the PDCCH obtained from the control resource set, and the information carried in the search space by the PDCCH can be obtained according to the related prior art, which is not described in the application.
In the embodiment shown in fig. 3, the terminal device determines a control resource set first, where the frequency domain bandwidth occupied by the control resource set is less than or equal to 5MHz, and when the NR network is deployed on a dedicated frequency domain resource with a bandwidth less than 5MHz, the terminal device may receive the complete control resource set, and further may decode the PDCCH according to the control resource set, so that the terminal device may access the NR network.
The process of determining the set of control resources is described in detail below in connection with the embodiments shown in fig. 5-8, based on the embodiment shown in fig. 3.
Fig. 5 is a schematic flow chart of determining a control resource set according to an embodiment of the present application. Referring to fig. 5, the method includes:
s501, acquiring configuration information of a control resource set.
The terminal device may first blindly detect the SSB, acquire MIB information from the PBCH of the SSB, and a PDCCH-ConfigSIB1 field in the MIB information indicates configuration information of the control resource set.
The configuration information includes: the number of resource blocks, an offset value of a first frequency domain starting position of the control resource set relative to a second frequency domain starting position of the synchronization signal block-common resource block SSB-CRB, the number of OFDM symbols.
The number of resource blocks is smaller than the minimum number of resource blocks in the existing control resource set.
The number of resource blocks is less than or equal to a preset number, which is less than or equal to 18.
The number of resource blocks may be an integer multiple of a preset value, and exemplary, the number of resource blocks may be 6, 12, 18.
The offset value refers to the number of resource block offsets of the first frequency domain starting position relative to the second frequency domain starting position.
Compared with the existing protocol, the embodiment of the application introduces a negative value to the offset value, wherein the offset value is a numerical value between a first value and a second value, the first value is smaller than 0, and the second value is larger than 0; that is, the first frequency domain starting position may be shifted upward (the low frequency point is shifted to the high frequency point, i.e., the resource block number becomes larger) or downward (the high frequency point is shifted to the low frequency point, i.e., the resource block number becomes smaller) or not.
Compared with the existing protocol, the embodiment of the application adds the number of the OFDM symbols, wherein the number of the OFDM symbols is smaller than or equal to a preset value, and the preset value is smaller than or equal to 8.
Illustratively, the number of OFDM symbols may be 1,2,3, 4, 6, 8.
For ease of understanding, the following is provided with configuration information for CORESET #0, as shown in table 1:
TABLE 1 CORESET #0 configuration Table
S502, determining the frequency domain resources of the control resource set according to the number of the resource blocks and the offset value in the configuration information.
The frequency domain resource may refer to a starting position of the control resource set on the frequency domain, and a bandwidth occupied on the frequency domain.
The frequency domain resource controlling the resource set may be determined according to the number of resource blocks and the offset value by: acquiring a second frequency domain initial position; determining a first frequency domain starting position according to the second frequency domain starting position and the offset value; and determining the frequency domain resources of the control resource set according to the first frequency domain starting position and the number of the resource blocks.
The second frequency domain starting position may be obtained by: and acquiring SSB, and determining a second frequency domain starting position according to the SSB.
For example, the terminal device blindly detects the SSB first, obtains a frequency domain start position of the SSB and a subcarrier offset (Kssb), and determines a second frequency domain start position according to the frequency domain start position of the SSB and the Kssb.
When the bandwidth of the communication system is less than 5MHz, especially less than 3.6MHz, for example, the system bandwidth is 3MHz, the terminal device cannot read the complete SSB, but the terminal device can completely receive PSS and SSS parts in the SSB by means of puncturing, then receive part of PBCH, and decode MIB.
In order to facilitate understanding, the manner of receiving SSB will be described below with reference to fig. 6.
Fig. 6 is a schematic diagram of a receiving manner of SSB according to an embodiment of the present application. Referring to fig. 6, the bandwidth of the communication system is 3MHz, if the subcarrier spacing is 15KHz, the bandwidth occupied by the entire SSB is 3.6MHz, the bandwidth occupied by the PSS and SSS is about 1.9MHz, and the SSB can be received by puncturing at the puncturing position, so that the complete PSS and SSS, and part of the PBCH can be guaranteed to be received.
For ease of understanding, the frequency domain resources of the control resource set are described below in connection with fig. 7.
Fig. 7 is a schematic diagram of a location of a control resource set according to an embodiment of the present application. Referring to FIG. 7, the number of resource blocks is illustrated with an Offset value (Offset) of-4 for CORESET#0 and SSB-CRB, and a number of resource blocks of 6.
Firstly, determining a frequency domain starting position of an SSB, taking the frequency domain starting position of the SSB as a starting point, shifting Kssb downwards, and determining a second frequency domain starting position of the SSB-CRB; taking the second frequency domain starting position as a starting point, shifting 4 resource blocks upwards to obtain a first frequency domain starting position; and finally, determining the frequency domain resource of CORESET#0 according to the first frequency domain starting position and the number of resource blocks.
The embodiment of the application can define that the frequency domain starting position of the common resource block (Common Resource Block, CRB) #0 is the same as the first frequency domain starting position of the control resource set. Therefore, the offset value may also be an offset value of the frequency domain start position of crb#0 with respect to SSB-CRB.
The frequency domain start position of crb#0 refers to the center frequency point of the first subcarrier in crb#0.
Fig. 8 is a schematic diagram of a location of another control resource set according to an embodiment of the present application. Referring to FIG. 8, the frequency domain start position of CRB#0 is PointA, the offset value of the frequency domain start position of CRB#0 with respect to SSB-CRB is represented by PointAoffset, and the number of resource blocks is 6 as PointAoffset of-4.
Firstly, determining a frequency domain starting position of an SSB, taking the frequency domain starting position of the SSB as a starting point, shifting Kssb downwards, and determining a second frequency domain starting position of the SSB-CRB; taking the second frequency domain starting position as a starting point, shifting 4 resource blocks upwards to obtain PointA, wherein the PointA is the first frequency domain starting position; and finally, determining the frequency domain resource of CORESET#0 according to the first frequency domain starting position and the number of resource blocks.
S503, determining the time domain resource of the control resource set according to the OFDM symbol number in the configuration information.
The time domain resource of the control resource set refers to the number of OFDM symbols occupied by the control resource in the time domain.
Taking the control resource set shown in fig. 7 as an example, the number of OFDM symbols is 4.
S504, determining a control resource set according to the frequency domain resource and the time domain resource.
Specifically, according to the frequency domain resource and the time domain resource, the frequency band occupied by the control resource set on the frequency domain and the size on the time domain are determined.
Taking the control resource set shown in fig. 7 as an example, the starting position of the control resource set on the frequency domain is represented by the first frequency domain starting position, and then the frequency domain resource range occupied by the control resource set on the frequency domain is determined to be 6 resource blocks by taking the first frequency domain starting position as a starting point; and determining that the size of the control resource set occupied in the time domain is 4 symbol numbers according to the time domain resource.
In the embodiment shown in fig. 5, configuration information of a control resource set is acquired; determining the frequency domain resource of the control resource set according to the number of resource blocks and the offset value in the configuration information; determining time domain resources of a control resource set according to the OFDM symbol number in the configuration information; and finally, determining a control resource set according to the frequency domain resource and the time domain resource. The frequency domain bandwidth occupied by the control resource set is less than or equal to 5MHz, and when the NR network is deployed on a special frequency domain resource with the bandwidth less than 5MHz, the terminal equipment can receive the complete control resource set, and then the PDCCH can be decoded according to the control resource set, so that the terminal equipment can be accessed to the NR network.
Fig. 9 is a schematic structural diagram of an apparatus for decoding PDCCH according to an embodiment of the present application. Referring to fig. 9, the apparatus 10 for decoding PDCCH includes: a determination module 11 and a decoding module 12, wherein,
the determining module 11 is configured to determine a control resource set, where a frequency domain bandwidth occupied by the control resource set is less than or equal to a preset frequency domain bandwidth;
the decoding module 12 is configured to decode a physical downlink control channel PDCCH according to the control resource set.
In one possible implementation, the preset frequency domain bandwidth is less than or equal to 5M.
In a possible embodiment, the determining module 11 is specifically configured to:
acquiring configuration information of the control resource set;
and determining the control resource set according to the configuration information.
In a possible implementation manner, the configuration information includes at least one of the following:
the number of resource blocks;
offset values of the first frequency domain starting position of the control resource set relative to the second frequency domain starting position of the synchronous signal block-common resource block SSB-CRB;
number of orthogonal frequency division multiplexing OFDM symbols.
In one possible implementation, the number of resource blocks is less than or equal to a preset number, which is less than or equal to 18.
In one possible embodiment, the offset value is a value between a first value less than 0 and a second value greater than 0.
In one possible implementation, the number of OFDM symbols is less than or equal to a preset value, which is less than or equal to 8.
In a possible embodiment, the determining module 11 is specifically configured to:
determining the frequency domain resource of the control resource set according to the number of the resource blocks and the offset value;
determining time domain resources of the control resource set according to the OFDM symbol number;
and determining the control resource set according to the frequency domain resource and the time domain resource.
In a possible embodiment, the determining module 11 is specifically configured to:
acquiring the second frequency domain initial position;
determining the first frequency domain starting position according to the second frequency domain starting position and the offset value;
and determining the frequency domain resources of the control resource set according to the first frequency domain starting position and the number of the resource blocks.
In a possible embodiment, the determining module 11 is specifically configured to:
acquiring a synchronous signal block SSB;
and determining the second frequency domain starting position according to the SSB.
In a possible implementation manner, a frequency domain starting position of the preset common resource block is the same as the first frequency domain starting position.
The device 10 for decoding PDCCH provided in the embodiment of the present application may execute the technical scheme shown in the above method embodiment, and its implementation principle and beneficial effects are similar, and will not be described in detail.
Fig. 10 is a schematic structural diagram of an apparatus for decoding PDCCH according to an embodiment of the present application. Referring to fig. 10, the apparatus 20 for decoding a PDCCH may include: a memory 21, and a processor 22. The memory 21, the processor 22, are illustratively interconnected by a bus 23.
The memory 21 is used for storing program instructions;
the processor 22 is configured to execute the program instructions stored in the memory, so as to cause the apparatus 20 for decoding PDCCH to perform the method for decoding PDCCH described above.
The device for decoding the PDCCH may be a chip, a module, an integrated development environment (Integrated Development Environment, IDE), etc.
The apparatus for decoding PDCCH shown in the embodiment of fig. 10 may execute the technical solution shown in the embodiment of the method, and its implementation principle and beneficial effects are similar, and will not be described herein again.
Embodiments of the present application provide a computer-readable storage medium having stored therein computer-executable instructions for implementing the above-described method for decoding PDCCH when the computer-executable instructions are executed by a processor.
Embodiments of the present application may also provide a computer program product comprising a computer program which, when executed by a processor, implements the above-described method of decoding PDCCH.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in the present application is not limited to the specific combinations of technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the spirit of the disclosure. Such as the technical solution formed by the replacement of the above-mentioned features with the technical features having similar functions disclosed in the present application (but not limited to).
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the application. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely exemplary forms of implementing the claims.

Claims (15)

1. A method of decoding PDCCH, comprising:
determining a control resource set, wherein the frequency domain bandwidth occupied by the control resource set is smaller than or equal to a preset frequency domain bandwidth;
and decoding the physical downlink control channel PDCCH according to the control resource set.
2. The method of claim 1, wherein the predetermined frequency domain bandwidth is less than or equal to 5M.
3. The method according to claim 1 or 2, wherein determining the set of control resources comprises:
acquiring configuration information of the control resource set;
and determining the control resource set according to the configuration information.
4. A method according to claim 3, wherein the configuration information comprises:
the number of resource blocks;
offset values of the first frequency domain starting position of the control resource set relative to the second frequency domain starting position of the synchronous signal block-common resource block SSB-CRB;
number of orthogonal frequency division multiplexing OFDM symbols.
5. The method of claim 4, wherein the number of resource blocks is less than or equal to a preset number, the preset number being less than or equal to 18.
6. The method of claim 4, wherein the offset value is a value between a first value less than 0 and a second value greater than 0.
7. The method of claim 4, wherein the number of OFDM symbols is less than or equal to a preset value, the preset value being less than or equal to 8.
8. The method according to any of claims 4-7, wherein determining the set of control resources from the configuration information comprises:
determining the frequency domain resource of the control resource set according to the number of the resource blocks and the offset value;
determining time domain resources of the control resource set according to the OFDM symbol number;
and determining the control resource set according to the frequency domain resource and the time domain resource.
9. The method of claim 8, wherein determining the frequency domain resources of the control resource set based on the number of resource blocks and the offset value comprises:
acquiring the second frequency domain initial position;
determining the first frequency domain starting position according to the second frequency domain starting position and the offset value;
and determining the frequency domain resources of the control resource set according to the first frequency domain starting position and the number of the resource blocks.
10. The method of claim 9, wherein obtaining the second frequency domain starting position comprises:
acquiring a synchronous signal block SSB;
and determining the second frequency domain starting position according to the SSB.
11. The method according to any of claims 4-10, wherein a frequency domain starting position of a preset common resource block is the same as the first frequency domain starting position.
12. An apparatus for decoding PDCCH, comprising: a determining module and a decoding module, wherein,
the determining module is used for determining a control resource set, and the frequency domain bandwidth occupied by the control resource set is smaller than or equal to a preset frequency domain bandwidth;
the decoding module is configured to decode a physical downlink control channel PDCCH according to the control resource set.
13. An electronic device, comprising: a memory, a processor;
the memory is used for storing computer execution instructions;
the processor executing computer-executable instructions stored in the memory, causing the processor to perform the method of decoding PDCCH as recited in any one of claims 1 to 11.
14. A computer-readable storage medium having stored therein computer-executable instructions for implementing the method of decoding PDCCH of any of claims 1 to 11 when said computer-executable instructions are executed by a processor.
15. A computer program product comprising a computer program which, when executed by a processor, implements the method of decoding PDCCH of any of claims 1 to 11.
CN202210415135.9A 2022-04-20 2022-04-20 Method, device, equipment and storage medium for decoding PDCCH Pending CN116981064A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210415135.9A CN116981064A (en) 2022-04-20 2022-04-20 Method, device, equipment and storage medium for decoding PDCCH
PCT/CN2023/089123 WO2023202598A1 (en) 2022-04-20 2023-04-19 Pdcch decoding method and apparatus, device and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210415135.9A CN116981064A (en) 2022-04-20 2022-04-20 Method, device, equipment and storage medium for decoding PDCCH

Publications (1)

Publication Number Publication Date
CN116981064A true CN116981064A (en) 2023-10-31

Family

ID=88419239

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210415135.9A Pending CN116981064A (en) 2022-04-20 2022-04-20 Method, device, equipment and storage medium for decoding PDCCH

Country Status (2)

Country Link
CN (1) CN116981064A (en)
WO (1) WO2023202598A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11277737B2 (en) * 2019-01-16 2022-03-15 Qualcomm Incorporated Control resource set for UEs having different bandwidth capabilities
CN114175787A (en) * 2019-08-16 2022-03-11 联想(北京)有限公司 Method and device for designing CORESET for UE supporting NR IOT application program
EP4101228A1 (en) * 2020-02-05 2022-12-14 Telefonaktiebolaget LM Ericsson (publ) Pdcch reliability enhancements with multiple trps
CN115883008A (en) * 2021-09-29 2023-03-31 华为技术有限公司 Communication method and device

Also Published As

Publication number Publication date
WO2023202598A1 (en) 2023-10-26

Similar Documents

Publication Publication Date Title
CN109729580B (en) Communication method and device
EP2721890B1 (en) Telecommunications method and system
EP3364590B1 (en) Telecommunications method and system
CN103716895B (en) Resource determination method and device for physical random access channel
CN109600832B (en) Paging message transmission method and device
CN108696384B (en) Narrowband Internet of things access method and user equipment
CN106936558B (en) Enhanced sounding reference signal mapping method and device
CN107615841B (en) Resource mapping method and device
EP3461204B1 (en) Telecommunications method and system
CN110149294B (en) Synchronous signal block transmission method, communication device and communication equipment
CN110546990B (en) Indicating method, device, equipment and storage medium for rate matching
CN108632840B (en) Beam resource configuration method, base station and terminal equipment
CN110971281B (en) Beam scanning method, beam configuration method, terminal and network equipment
US20210036904A1 (en) Data channel transmission method, data channel receiving method, and apparatus
CN109391424B (en) Data sending method, equipment and system
CN115397006A (en) Narrowband Internet of things access method and user equipment
CN110537386B (en) Method, device, equipment and medium for transmitting and receiving synchronous broadcast block
EP3700270A1 (en) Control information sending method, detection method, network device, and terminal
WO2021217503A1 (en) Method and apparatus for initial access of a ue
CN116134894A (en) Resource information indication method and device
WO2021092900A1 (en) Method and apparatus for wireless communication
WO2021003746A1 (en) Method and device for indicating channel state of unlicensed spectrum, and storage medium
CN116981064A (en) Method, device, equipment and storage medium for decoding PDCCH
EP4364337A1 (en) Synchronization raster based indication of narrowband system information modifications
CN116981080A (en) Method, device, equipment and storage medium for decoding PDCCH

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination