CN110798866B - Method and device for determining and acquiring downlink control channel resources, base station and terminal - Google Patents

Method and device for determining and acquiring downlink control channel resources, base station and terminal Download PDF

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CN110798866B
CN110798866B CN201810865035.XA CN201810865035A CN110798866B CN 110798866 B CN110798866 B CN 110798866B CN 201810865035 A CN201810865035 A CN 201810865035A CN 110798866 B CN110798866 B CN 110798866B
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CN110798866A (en
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王化磊
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • 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
    • 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

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Abstract

A method and a device for determining and acquiring downlink control channel resources, a storage medium, a base station and a terminal are provided, wherein the determining method comprises the following steps: determining each sub-band resource of an available unlicensed frequency band, wherein the available unlicensed frequency band refers to an unlicensed frequency band available for a network and user equipment; determining indication information based on each subband resource, the indication information comprising at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs. By the technical scheme provided by the invention, when BWP spans a plurality of sub-band resources, the downlink control channel resources can still be determined, so as to provide reference for UE blind detection PDCCH.

Description

Method and device for determining and acquiring downlink control channel resources, base station and terminal
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for determining and acquiring downlink control channel resources, a storage medium, a base station, and a terminal.
Background
The 3rd Generation Partnership Project (3 GPP) standards organization will study how to deploy The Fifth-Generation mobile communications (5G for short) New wireless (New Radio, NR for short) system on The unlicensed spectrum, so as to achieve The purpose of fairly and effectively utilizing The unlicensed spectrum and increasing The data transmission rate of The NR system. The NR system uses unlicensed spectrum technology, also known as New radio access unlicensed (NR-U) technology.
There are three main ways of NR-U technology. A first NR cell of an unlicensed spectrum is used as a primary cell; the second is that a User Equipment (User Equipment, UE for short) accesses an unlicensed spectrum NR cell through a licensed spectrum Long Term Evolution (LTE) cell, and the third is that the UE accesses an unlicensed spectrum NR cell through a licensed spectrum NR cell. In the second and third modes, the UE and the NR base station (also referred to as a gNB) or an evolved Node B (eNB) may operate on the licensed spectrum and the unlicensed spectrum simultaneously through a carrier aggregation technique.
The existing 3GPP LTE system adopts Licensed Assisted Access (LAA) technology to communicate in unlicensed spectrum. Since the WiFi channel uses 20MHz and its integer multiple to communicate, LAA also requires that the transmission bandwidth is only 20MHz when there is WiFi, and the listening of LBT is also 20 MHz.
However, in NR, the Bandwidth range of a single Bandwidth Part (BWP) is large, and may be larger than 20MHz or smaller than 20 MHz. When CORESET spans multiple sub-band resources, there is no mature solution for how to perform downlink control channel transmission.
Disclosure of Invention
The technical problem solved by the invention is how to determine the downlink control channel resource when BWP spans multiple sub-band resources, so as to provide reference for UE blind detection PDCCH.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for determining downlink control channel resources, where the method for determining downlink control channel resources includes: determining each sub-band resource of an available unlicensed frequency band, wherein the available unlicensed frequency band refers to an unlicensed frequency band available for a network and user equipment; determining indication information based on each subband resource, the indication information comprising at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
Optionally, when the indication information includes the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by using a bitmap.
Optionally, the frequency domain position of the control resource set in each subband resource is determined based on the following manner: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part of the user equipment; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values of a bitmap to indicate frequency domain positions of a set of control resources in the respective subband resources.
Optionally, the bandwidth part BWP with index i of the user equipment isiThe bitmap comprises Y subbands, and the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is determined according to the following formula:
Figure BDA0001750702810000021
wherein len _ bitmap represents a bit length of the bitmap,
Figure BDA0001750702810000022
is BWPiThe index of y is the number of PRBs in the subband,
Figure BDA0001750702810000023
is BWPiThe index in (1) is the PRB starting index of the subband of Y, i and Y are non-negative integers, and Y is a positive integer.
Optionally, the method for determining downlink control channel resources further includes: when the indication information comprises the REG numbers in each sub-band resource, determining a plurality of REG bundles based on the REG numbers in each sub-band resource, wherein the REG bundles with index i in the plurality of REG bundles comprise REGs with the number of i
Figure BDA0001750702810000024
Wherein the content of the first and second substances,
Figure BDA0001750702810000025
and the quantity of REGs of a control resource set CORESET in the subband resource subband is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
Optionally, the method for determining downlink control channel resources further includes: and sending the indication information to the user equipment.
In order to solve the above technical problem, an embodiment of the present invention further provides a method for acquiring downlink control channel resources, where the method for acquiring downlink control channel resources includes: receiving indication information sent by a network, wherein the indication information at least comprises one of the following items: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level; extracting one or more of the following from the indication information: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
Optionally, when the indication information includes the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by using a bitmap.
Optionally, the method for acquiring downlink control channel resources further includes: and determining the frequency domain position of the control resource set in each sub-band resource according to each bit value in the bitmap.
Optionally, the method for acquiring downlink control channel resources further includes: when the indication information comprises the REG numbers in each sub-band resource, determining a plurality of REG bundles based on the REG numbers in each sub-band resource, wherein the REG bundle with index i in the plurality of REGs comprises the REG number of I
Figure BDA0001750702810000031
Wherein the content of the first and second substances,
Figure BDA0001750702810000032
and the quantity of REGs of a control resource set CORESET in the subband resource subband is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a device for determining downlink control channel resources, where the device for determining downlink control channel resources includes: a first determining module, adapted to determine each sub-band resource of an available unlicensed frequency band, where the available unlicensed frequency band refers to an unlicensed frequency band available for a network and a user equipment; a second determining module adapted to determine indication information based on the respective subband resources, the indication information comprising at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
Optionally, when the indication information includes the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by using a bitmap.
Optionally, the frequency domain position of the control resource set in each subband resource is determined based on the following manner: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part of the user equipment; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values in a bitmap to indicate frequency domain locations of sets of control resources in the respective subband resources.
Optionally, the bandwidth part BWP with index i of the user equipment isiThe bitmap comprises Y subbands, and the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is determined according to the following formula:
Figure BDA0001750702810000041
wherein len _ bitmap represents a bit length of the bitmap,
Figure BDA0001750702810000042
is BWPiThe index of y is the number of PRBs in the subband,
Figure BDA0001750702810000043
is BWPiThe index in (1) is the PRB starting index of the subband of Y, i and Y are non-negative integers, and Y is a positive integer.
Optionally, the apparatus for determining downlink control channel resources further includes: a third determining module, adapted to determine, when the indication information includes REG numbers in respective subband resources, multiple REG bundles based on the REG numbers in the respective subband resources, where the REG bundles with index i in the multiple REG bundles include REGs with number i
Figure BDA0001750702810000044
Wherein the content of the first and second substances,
Figure BDA0001750702810000045
and the quantity of REGs of a control resource set CORESET in the subband resource sub-band is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
Optionally, the apparatus for determining downlink control channel resources further includes: a sending module adapted to send the indication information to the user equipment.
In order to solve the above technical problem, an embodiment of the present invention further provides an apparatus for acquiring downlink control channel resources, where the apparatus for acquiring downlink control channel resources includes: the receiving module is suitable for receiving indication information sent by a network, and the indication information at least comprises one of the following items: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level; an extraction module adapted to extract from the indication information one or more of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
Optionally, when the indication information includes the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by using a bitmap.
Optionally, the apparatus for acquiring downlink control channel resources further includes: and the first determining module is suitable for determining the frequency domain position of the control resource set in each subband resource according to each bit value in the bitmap.
Optionally, the apparatus for acquiring downlink control channel resources further includes: a second determining module, adapted to determine, when the indication information includes REG numbers in respective subband resources, multiple REG bundles based on the REG numbers in the respective subband resources, where a REG bundle with an index of i in the multiple REG bundles includes a REG number of i
Figure BDA0001750702810000051
Wherein the content of the first and second substances,
Figure BDA0001750702810000052
and the quantity of REGs of a control resource set CORESET in the subband resource subband is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
In order to solve the above technical problem, an embodiment of the present invention further provides a storage medium, where a computer instruction is stored, and when the computer instruction runs, the method for determining downlink control channel resources or the method for acquiring downlink control channel resources is performed.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a base station, including a memory and a processor, where the memory stores a computer instruction executable on the processor, and the processor executes the step of the method for determining downlink control channel resources when executing the computer instruction.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores a computer instruction that can be executed on the processor, and the processor executes the step of the method for acquiring downlink control channel resources when executing the computer instruction.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method for determining downlink control channel resources, which comprises the following steps: determining each sub-band resource of an available unlicensed frequency band, wherein the available unlicensed frequency band refers to an unlicensed frequency band available for a network and user equipment; determining indication information based on each subband resource, the indication information comprising at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs. Through the technical scheme provided by the embodiment of the invention, when part of subband resources in the unlicensed band BWP are unsuccessfully accessed to the channel, so that the BWP comprises a plurality of subbands with discontinuous spectrum resources, the UE can determine the PDCCH candidates through the indication information (for example, the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding PDCCH candidates) and provide reference for the blind detection PDCCH.
Further, when the indication information includes the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by using a bitmap. By the technical scheme provided by the embodiment of the invention, the frequency domain position of the control resource set in each sub-band resource can be indicated by using the bitmap, and when the control resource set spans a plurality of sub-band resources, the candidate PDCCH resources are further determined.
Further, the indication information is sent to the user equipment. Through the technical scheme provided by the embodiment of the invention, when BWP in an unauthorized frequency band comprises a plurality of sub-bands with discontinuous spectrum resources, UE can still perform blind detection on PDCCH based on the indication information.
Drawings
Fig. 1 is a schematic diagram illustrating a correspondence relationship between a control resource set and a resource block in the prior art;
fig. 2 is a schematic diagram illustrating a correspondence relationship between a control resource set and a resource block in the prior art;
fig. 3 is a flowchart illustrating a method for determining downlink control channel resources according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for acquiring downlink control channel resources according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for determining downlink control channel resources according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for acquiring downlink control channel resources according to an embodiment of the present invention;
fig. 7 is a signaling interaction diagram of an exemplary scenario according to an embodiment of the present invention.
Detailed Description
As mentioned in the background, when BWP includes multiple sub-bands, there is still a lack of downlink control channel resource transmission scheme.
In the prior art, the LAA technology utilizes a Listen-Before-Talk (Listen-Before-Talk, LBT) mechanism to realize coexistence of different communication systems (e.g., an LTE system and a Wi-Fi system) in an unlicensed spectrum. The basic principle of the LBT mechanism is: before transmitting data in an unlicensed spectrum, a node determines whether a current Channel is available through a Clear Channel Assessment (CCA) mechanism based on an Energy detection (Energy detection) result. Some regional regulations specify an Energy detection threshold (Energy detection threshold), and if the node received Energy is higher than the specified Energy detection threshold, the channel is considered busy and the channel is not available.
The LAA downlink transmission supports two channel access procedures, Type 1(Type 1) channel access and Type 2(Type 2) channel access. Similarly, LAA uplink transmission also supports two channel access procedures: type 1 channel access and Type 2 channel access. Type 1 is a channel access based on category 4(Cat 4), and Type 2 is a channel access based on category 2(Cat 2).
Specifically, the Type 1 channel access procedure, that is, the random backoff LBT procedure of the non-fixed length contention window, may include the following steps: (1) while monitoring the channel, if the channel is idle within the defer duration, a backoff timer N may be initialized; (2) N-NinitAnd N isinitIs 0 to CWpThe random number of (2); (3) if N is present>0 and the base station decreases the value of the counter, then N-1, otherwise if N-0, stop counting or stop counting when the channel is busy.
The Type 2 channel access process is a random backoff LBT process of a fixed length contention window, and requires that at least the idle time of a detected channel is 25 microseconds (μ s) and the average energy is lower than an energy threshold, and downlink or uplink data can be sent on a channel transmitted by an unlicensed cell only when the transmission time is less than 1 ms.
Since the WiFi channel uses 20MHz and its integer multiple, LAA also requires that the transmission bandwidth can only be 20MHz when there is WiFi, and the listening of LBT is also 20 MHz. Therefore, the PUCCH and UL-SCH transmission bandwidths in LAA are allocated with staggered resources on the basis of 20 MHz.
The inventor of the present application finds, through research, that in a New Radio (NR, also referred to as New air interface) access system, a base station may configure a User Equipment (User Equipment, UE) in one or more Control Resource sets (CORESET), and detect a Downlink Control Information signaling (DCI) belonging to the base station according to a Radio Network Temporary Identifier (RNTI). For example, for a scenario without considering carrier aggregation, the UE operates on one carrier, and the base station may configure the UE to detect search spaces in one or more CORESET on the carrier, detect DCI belonging to the UE according to its RNTI, and then receive data or upload data according to the DCI.
A single DCI is carried by at least one Control Channel Element (CCE). The number of CCEs carrying a single DCI is called Aggregation Level (Aggregation Level), which may be 1, 2, 4, 8, or 16. In the existing NR protocol, only a single CCE is supported to include 6 Resource Element Groups (REGs). Each REG refers to a single Resource Block (RB) occupying one Orthogonal Frequency Division Multiplexing (OFDM) symbol duration, that is, each REG contains 12 Resource Elements (REs) that are consecutive in the Frequency domain.
Further, NR introduces a new concept of "bandwidth Part (BWP)" to allow NR UE to access NR system using narrowband BWP and transmit service using broadband BWP. After each UE accesses the NR network, multiple BWPs may be configured by the network. Each BWP occupies a limited bandwidth and at least one BWP allows idle-state UEs to camp on. The idle UE may receive network information such as system messages and paging messages from the BWP, initiate random access through the BWP, establish Radio Resource Control (RRC) connection, enter a connection state from the idle state, and further establish a data Radio bearer. After the UE accesses the network, the network may configure other BWPs for the UE according to the UE capabilities, service requirements, and the like.
In NR, each BWP contains corresponding parameter configuration information. The UE acquires parameter configuration information of the BWP, and the BWP can be applied only after being activated by the network, such as the location of the Physical REsource block occupied by the BWP, and the COntrol REsource SET (CORESET) configuration therein, the Physical Downlink Shared CHannel (PDSCH) configuration, the Physical Uplink COntrol CHannel (PUCCH) configuration, the Physical Uplink Shared CHannel (PUSCH) configuration, the Reference Signal (RS) configuration, the Random Access CHannel (RACH) configuration, and other Physical layer related parameter configuration information.
Further, referring to fig. 1, a corresponding relationship between a Common Resource Block (CRB) index, a PRB index in BWP, and CORESET is schematically shown. The CRB indexes may count from 0, with different CRB indexes representing different CRBs. Physical Resource Block (PRB) in BWP starts counting from 0. The CORESET includes 6 consecutive PRBs from the PRBs available for configuring the CORESET. In fig. 1, different CORESET are shown with different shading.
In authorized resources, in BWPiIndicating that one BWP, CORESET may be included in frequency
Figure BDA0001750702810000081
Each Resource Block (RB), if the CORESET is configured by UE-specific signaling, the configuration mode may use a length of RB
Figure BDA0001750702810000082
A bit (bit) bitmap indicates which 6 RBs within the bandwidth are allocated to the CORESET every 1 bit. Wherein the content of the first and second substances,
Figure BDA0001750702810000091
is BWPiThe number of middle RBs;
Figure BDA0001750702810000092
is the PRB start index in BWP with index i, i is a non-negative integer. Also, the high order bits in the bitmap correspond to RBs (e.g., 6 RBs) within BWP that are available for configuration as CORESET from low frequency. 1 in the bitmap represents that 6 RBs corresponding to the position are frequency domain resources of the CORESET, and 0 represents that 6 RBs corresponding to the position are not frequency domain resources of the CORESET.
Those skilled in the art understand that if the prior art is adopted to configure 6 RBs of the CORESET, the configuration needs to be limited within one subband resource, and cannot be configured across subbands. The following is illustrated by way of example in fig. 2. Fig. 2 schematically shows a corresponding relationship between CORESET and CRB index and Physical Resource Block (PRB) index in BWP. The CRB indexes may count from 0, with different CRB indexes representing different CRBs. When the BWP includes multiple subbands, the PRB indices in the BWP are continuously counted, and may still be counted starting from index 0. In fig. 2, BWP includes sub-band 1, sub-band 2, and sub-band 3. Subband 1 includes PRBs 0 through PRB97, subband 2 includes PRBs 98 through PRB101, and subband 3 includes PRB102 and PRB 103. In the prior art, the available CORESET can be formed from the PRB4 to the PRB96 belonging to the subband 1, but the available CORESET cannot be formed for the PRB96 and PRB97 belonging to the subband 1, the PRB98 to PRB100 belonging to the subband 2, and the PRB101 belonging to the subband 3 across 3 subbands.
Therefore, after successfully preempting the unlicensed spectrum resources, if the BWP includes multiple sub-bands, how to determine the downlink control channel resources becomes a technical problem that must be solved for downlink control information transmission.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for determining downlink control channel resources, where the method for determining downlink control channel resources includes: determining each sub-band resource of an available unlicensed frequency band, wherein the available unlicensed frequency band refers to an unlicensed frequency band available for a network and user equipment; determining indication information based on each subband resource, the indication information comprising at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
Through the technical scheme provided by the embodiment of the invention, when part of subband resources in the unlicensed band BWP are unsuccessfully accessed to the channel, so that the BWP comprises a plurality of subbands with discontinuous spectrum resources, the UE can determine the PDCCH candidates through the indication information (for example, the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding PDCCH candidates) and provide reference for the blind detection PDCCH.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 3 is a flowchart illustrating a method for determining downlink control channel resources according to an embodiment of the present invention. The determination method may be applied to the network side, for example, performed by a base station. Specifically, the method for determining downlink control channel resources may include the following steps:
step S301: determining each sub-band resource of an available unlicensed frequency band, wherein the available unlicensed frequency band refers to an unlicensed frequency band available for a network and user equipment;
step S302: determining indication information based on each subband resource, the indication information comprising at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
More specifically, in step S301, if the network (e.g., NR base station) and the UE use the unlicensed frequency band to transmit data, the unlicensed frequency spectrum resources need to be preempted by the LBT mechanism before transmitting data. When the unlicensed spectrum resources are successfully preempted by the LBT mechanism, the network may determine available unlicensed spectrum resources that can be used to transmit data. The available unlicensed spectrum resources refer to unlicensed spectrum resources available for use by the network and the UE. As a variation, the UE may preempt the unlicensed spectrum resource through an LBT mechanism and report the preempted unlicensed spectrum resource, so that the base station on the network side may determine the available unlicensed spectrum resource according to the unlicensed spectrum resource reported by the UE.
In specific implementation, a Wireless Local Area Network (WLAN) uses 20MHz or a frequency band resource of an integer multiple of 20MHz as a channel resource, so that a base station and/or a UE generally monitors the frequency band resource of 20MHz or an integer multiple of 20MHz when an LBT mechanism is used for competing for an unlicensed frequency spectrum resource. If the monitored spectrum resource is in an idle state, the base station and/or the UE can successfully preempt the spectrum resource based on an LBT mechanism; if the monitored spectrum resource is in a non-idle state, the base station and/or the UE cannot preempt the spectrum resource. When the base station obtains the unlicensed spectrum resources, the base station may determine available unlicensed spectrum resources that can be used to transmit data and may determine the available unlicensed spectrum resources as BWP resources for subsequent use.
The bandwidth of a single BWP in NR is large, possibly more than 20MHz, and possibly less than 20 MHz. When the unlicensed spectrum resource is used as the BWP resource, the base station may configure multiple sub-band resources for BWP through high-layer signaling (e.g., each sub-band resource may be 20MHz or an integer multiple of 20 MHz). In particular implementations, higher layer signaling may configure BWP with the number of subbands (e.g., Q subbands) included therein and indicate Q or (Q-1) PRB index values for indicating a subband starting PRB Pi. The PRB contained in the sub-band with index i is Pi～(Pi+1-1), i is a non-negative integer.
Specifically, in NR communication, the Resource grid (Resource grid) of a carrier is defined by
Figure BDA0001750702810000111
Sub-carriers and
Figure BDA0001750702810000112
an Orthogonal Frequency Division Multiplexing (OFDM) symbol. High layer signaling may configure a starting Common resource block (Common resource)ce Block, CRB for short)
Figure BDA0001750702810000113
And carrier bandwidth
Figure BDA0001750702810000114
Wherein, CRB is a common resource block in the carrier frequency domain, CRB of subcarrier spacing μ is counted from 0, and the center of the lowest subcarrier in CRB0 is denoted as node a (point a). Assuming BWPiIndicating one of the BWPs, then BWPiPRB n in (1)PRBAnd CRB nCRBIn a relationship of
Figure BDA0001750702810000115
Wherein
Figure BDA0001750702810000116
Is relative CRB0, BWPiThe initial number of CRBs in (a).
In step S302, the indication information may be determined based on each subband resource, so that the UE may determine the DCI resource based on the indication information, so that the UE explicitly determines the time-frequency resource used when the BWP transmits the DCI across the unlicensed spectrum resources of the multiple subband resources, and provides a reference for the blind detection PDCCH, which is beneficial for the UE to blind detect the PDCCH.
In a specific implementation, the indication information may include one or more of the following items: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the corresponding PDCCH (PDCCH candidate) number.
Wherein the CCE aggregation levels are in one-to-one correspondence with the number of the candidate PDCCHs corresponding to the CCE aggregation levels. Each PDCCH consists of one or more CCEs, each CCE consisting of 6 REGs. The number of CCEs constituting the PDCCH is indicated by an aggregation level.
As a non-limiting example, when the indication information includes frequency domain positions of the control resource sets in the respective subband resources, the frequency domain positions of the CORESET in the respective subband resources may be indicated by a bitmap (bitmap).
Concrete implementIn time, the base station may determine the frequency domain position of each CORESET for the UE based on the subband resources in the BWP, and first, the base station may determine the starting PRB and the number of PRBs of each subband resource in each BWP of the UE. Wherein different BWPs are distinguished by different indices. Assuming BWPi(i is a non-negative integer) represents one of the BWPs, then BWPiPRB n in (1)PRBAnd CRB nCRBIn a relationship of
Figure BDA0001750702810000121
Wherein
Figure BDA0001750702810000122
Is relative CRB0, BWPiThe initial number of CRBs in (a).
Thereafter, the bit length of the bitmap may be determined based on the starting PRB and the number of PRBs of each subband resource. In particular, the number of bits for indicating the CORESET may be determined for each subband resource contained in the BWP. Assume that the UE has multiple BWPs, one of which (e.g., BWP)i)， BWPiContaining Y subbands, the bit length of the bitmap may be determined using the following equation:
Figure BDA0001750702810000123
wherein len _ bitmap represents a bit length of the bitmap,
Figure BDA0001750702810000124
is BWPiThe index of y is the number of PRBs in the subband,
Figure BDA0001750702810000125
is BWPiThe index in (1) is the PRB starting index of the subband of Y, i and Y are non-negative integers, and Y is a positive integer.
As a non-limiting example, the bits in the bitmap may each indicate which RBs (e.g., 6 RBs) within a subband are allocated to CORESET. "1" in the bitmap represents that 6 RBs corresponding to the position are frequency domain resources of CORESET, and 0 represents that 6 RBs corresponding to the position are not frequency domain resources of CORESET. In addition, the PRBs (e.g., 6 PRBs) available for configuring CORESET in the subband resources are determined in order from low frequency to high frequency, the high bits of the bitmap correspond to the 6 low frequency PRBs available for configuring CORESET in the subband resources, and the low bits of the bitmap correspond to the 6 high frequency PRBs available for configuring CORESET in the subband resources.
As a variation, a "1" in the bitmap represents that 6 RBs (e.g., 6 PRBs) corresponding to a position are not frequency domain resources of CORESET, and a 0 represents that 6 PRBs corresponding to a position are frequency domain resources of CORESET. In addition, the PRBs available for configuring the CORESET in the subband resources are determined in an order from high frequency to low frequency, and the high bits of the bitmap correspond to the 6 low-frequency PRBs available for configuring the CORESET in the subband resources, and the low bits of the bitmap correspond to the 6 high-frequency PRBs available for configuring the CORESET in the subband resources.
Those skilled in the art understand that in practical applications, the bitmap may also be in one-to-one correspondence with RBs that can be used to configure the CORESET in other manners, and details are not described here.
As yet another non-limiting example, when the indication information includes REG numbers in the respective sub-band resources, a plurality of REG bundles may be determined based on the REG numbers. In specific implementation, if the CORESET includes multiple subband resources, each subband resource includes multiple PRBs, the base station may number REGs in each subband resource PRB, and determine multiple REG bundles based on the REG numbers in each subband resource.
Further, among the plurality of REG bundles, one of the REG bundles (e.g., REG bundle with index i) may contain REGs with the number of REGs as
Figure BDA0001750702810000131
Wherein the content of the first and second substances,
Figure BDA0001750702810000132
representing the number of REGs of a control resource set CORESET in the subband resource subband, L representing the number of REGs contained in a REG bundle with index i, i being non-negativeAnd L is a positive integer.
In particular, the amount of the solvent to be used,
Figure BDA0001750702810000133
wherein the content of the first and second substances,
Figure BDA0001750702810000134
the number of RBs of the control resource set CORESET in the subband resource subband is shown,
Figure BDA0001750702810000135
represents the number of symbols, usually referred to as OFDM symbols, contained in the control resource set CORESET.
As still another non-limiting example, the indication information may include CCE aggregation levels in respective subband resources and corresponding PDCCH candidate numbers. When the UE knows the aggregation levels of the CCEs, the number of PDCCH candidates corresponding to each aggregation level can be obtained. Specifically, on the premise that the UE Identity (ID) is known, the initial CCE index may be calculated according to a CCE initial index formula, and since the CCE indexes are consecutive, all PDCCH candidates may be known.
Fig. 4 is a flowchart illustrating a method for acquiring downlink control channel resources according to an embodiment of the present invention. The obtaining method may be used on the side of the user equipment, and specifically may include the following steps:
step S401, receiving indication information sent by a network, where the indication information at least includes one of the following items: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level;
step S402, one or more of the following items are extracted from the indication information: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
Specifically, in step S401, the UE may receive, from the network, indication information sent by the network, where the indication information may include one or more of the following: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
In a specific implementation, when the indication information includes a frequency domain position of a control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource may be indicated by using a bitmap.
In step S402, the UE may extract information from the indication information to obtain a frequency domain position of a control resource set in each subband resource and/or a REG number in each subband resource and/or a CCE aggregation level in each subband resource and a number of PDCCH candidates corresponding thereto.
Specifically, when the indication information includes frequency domain positions of the control resource sets in the respective subband resources, the UE may determine the frequency domain positions of the control resource sets in the respective subband resources according to respective bit values in the bitmap. For example, the UE and the base station have a bit value of "1" to indicate available CORESET, and a bit value of "0" to indicate unavailable CORESET, and after receiving the indication information, the UE may determine the frequency domain position of CORESET according to the bit value.
As a variation, when the indication information includes REG numbers in the respective sub-band resources, the UE may determine a plurality of REG bundles based on the REG numbers in the respective sub-band resources. Specifically, among the REGs, the REG bundle with index i includes REG number of i
Figure BDA0001750702810000141
Wherein the content of the first and second substances,
Figure BDA0001750702810000142
and the quantity of REGs of a control resource set CORESET in the subband resource sub-band is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
As still another variation, the UE may obtain CCE aggregation levels in each subband resource and the number of PDCCH candidates corresponding to the CCE aggregation levels from the indication information.
Those skilled in the art understand that, in implementation, the base station may send one or more of the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of PDCCH candidates corresponding thereto to the UE as the indication information. When the indication information comprises a plurality of items of information, the UE can be quickly informed of the information such as CORESET, REG bundle, CCE aggregation level and PDCCH candidate number.
Those skilled in the art understand that the steps S401 to S402 can be regarded as execution steps corresponding to the steps S301 to S302 in the embodiment shown in fig. 3, and the two steps are complementary in terms of specific implementation principle and logic. Therefore, for the method for acquiring the downlink control channel resource on the user equipment side, reference may be made to the related description of the embodiment shown in fig. 3, which is not described herein again.
As described above, according to the technical solution provided by the embodiment of the present invention, when the BWP includes multiple subband resources, the UE may determine the PDCCH candidate resource according to the indication information (e.g., the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource, and the number of PDCCH candidates corresponding to the CCE aggregation level), so as to blindly detect the PDCCH.
Fig. 5 is a device for determining downlink control channel resources according to an embodiment of the present invention. The determining apparatus 5 of downlink control channel resources (for simplicity, hereinafter referred to as the determining apparatus 5) may be applied to a network side (e.g., an NR base station) to implement the technical solution of the method in the embodiment shown in fig. 3.
Specifically, the determination means 5 may include: a first determining module 51 and a second determining module 52.
In a specific implementation, the first determining module 51 is adapted to determine each sub-band resource of an available unlicensed frequency band, where the available unlicensed frequency band refers to an unlicensed frequency band available for a network and a user equipment; the second determining module is adapted to determine indication information based on each subband resource, where the indication information includes at least one of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
As a non-limiting example, when the indication information includes frequency domain positions of control resource sets in respective subband resources, the frequency domain positions of the control resource sets in the respective subband resources are indicated with a bitmap.
Wherein the frequency domain position of the control resource set in each subband resource may be determined based on: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part of the user equipment; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values in a bitmap to indicate frequency domain locations of sets of control resources in the respective subband resources.
As a non-limiting example, the bandwidth part BWP indexed i of the user equipmentiThe bitmap comprises Y subbands, and the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is determined according to the following formula:
Figure BDA0001750702810000151
wherein len _ bitmap represents a bit length of the bitmap,
Figure BDA0001750702810000161
is BWPiThe index of y is the number of PRBs in the subband,
Figure BDA0001750702810000162
is BWPiIn the index, the index is the PRB starting index of the subband of Y, i and Y are non-negative integers, and Y is a positive integer.
As a variant, the determining means 5 may further comprise: a third determining module 53, adapted to include the REG number in each sub-band resource in the indication informationDetermining a plurality of REG bundles based on the REG numbers in each sub-band resource, wherein the REG bundles with index i in the plurality of REG bundles comprise REGs with the number of i
Figure BDA0001750702810000163
Wherein the content of the first and second substances,
Figure BDA0001750702810000164
and the quantity of REGs of a control resource set CORESET in the subband resource sub-band is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
Further, the determining device 5 may further include: a sending module 54 adapted to send the indication information to the user equipment.
For more details of the operation principle and the operation mode of the determining device 5, reference may be made to the related description in fig. 3, which is not described herein again.
Fig. 6 is a device for acquiring downlink control channel resources according to an embodiment of the present invention. The apparatus 6 for acquiring downlink control channel resources (for simplicity, hereinafter referred to as the acquiring apparatus 6) may be applied to a user equipment side (for example, an NR UE side) to implement the technical solution of the method in the embodiment shown in fig. 4.
Specifically, the acquiring means 6 may include: a receiving module 61, adapted to receive indication information sent by a network, where the indication information includes at least one of: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level; an extracting module 62 adapted to extract from the indication information one or more of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs.
In a specific implementation, when the indication information includes a frequency domain position of a control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by using a bitmap.
Further, the acquiring device 6 may further include: a first determining module 63, adapted to determine the frequency domain position of the control resource set in each subband resource according to each bit value in the bitmap.
Further, the acquiring device 6 may further include: a second determining module 64, adapted to determine multiple REG bundles based on the REG numbers in the respective subband resources when the REG numbers in the respective subband resources are included in the indication information, where a REG bundle with index i in the multiple REG bundles includes a REG number of i
Figure BDA0001750702810000171
Wherein the content of the first and second substances,
Figure BDA0001750702810000172
and the quantity of REGs of a control resource set CORESET in the subband resource subband is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
For more details of the operation principle and the operation mode of the obtaining device 6, reference may be made to the description of fig. 4, and details are not repeated here.
The signaling interaction between the user equipment and the network (e.g., NR base station) employing embodiments of the present invention is further described below in conjunction with a typical application scenario.
In a typical application scenario, referring to fig. 7, in a typical application scenario, after the ue 1 accesses the base station 2 in the network, the base station 2 may first perform operation s1, that is, preempt the unlicensed spectrum resources through the LBT mechanism, and determine the sub-band resources of the available unlicensed frequency bands. Optionally, the user equipment 1 may perform operation s 1', that is, the user equipment 1 reports the unlicensed spectrum resources to the base station 2, and after receiving the unlicensed spectrum resources, the base station 2 determines, by combining with the higher layer signaling, each subband resource of the available unlicensed frequency band.
Secondly, the base station 2 may perform operation s2, i.e. the base station 2 may determine the indication information so that the UE may know the DCI resources in BWP across multiple sub-bands to blindly detect the PDCCH. Wherein the indication information comprises one or more of: the frequency domain position of the control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of the corresponding candidate PDCCHs. In addition to determining the indication information, if the indication information includes frequency domain positions of control resource sets in respective subband resources, the frequency domain positions of the control resource sets in the respective subband resources may be indicated using a bitmap. If the REG number is indicated, each REG bundle may be determined according to the REG number.
Thereafter, the base station 2 may perform operation s3, i.e. may transmit the indication information to the user equipment 1.
Finally, after receiving the indication information, the ue 1 may perform operation s4, that is, blindly detecting the PDCCH according to the indication information to obtain the DCI.
For more contents of the working principles and working modes of the user equipment 1 and the base station 2 in the application scenario shown in fig. 7, reference may be made to the related descriptions in fig. 3 and fig. 4, which are not repeated herein.
Further, the embodiment of the present invention further discloses a storage medium, where a computer instruction is stored, and when the computer instruction runs, the technical solution of the method for determining downlink control channel resources in the embodiments shown in fig. 3 and fig. 4 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The computer readable storage medium may include ROM, RAM, magnetic or optical disks, and the like.
Further, an embodiment of the present invention further discloses a base station, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and the processor executes the technical scheme of the method for determining downlink control channel resources in the embodiment shown in fig. 3 when executing the computer instruction. Preferably, the base station may be an NR base station.
Further, an embodiment of the present invention further discloses a terminal, including a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the technical scheme of the method for acquiring downlink control channel resources in the embodiment shown in fig. 4 when running the computer instruction. Preferably, the terminal may be an NR UE.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (13)

1. A method for determining downlink control channel resources is characterized by comprising the following steps:
determining each sub-band resource of an available unlicensed frequency band, wherein the available unlicensed frequency band refers to an unlicensed frequency band available for a network and user equipment;
determining indication information based on each subband resource, the indication information comprising at least one of: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level;
when the indication information comprises the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by adopting a bitmap; the frequency domain position of the control resource set in each subband resource is determined based on: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part of the user equipment; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values of a bitmap to indicate frequency domain positions of a set of control resources in the respective subband resources;
bandwidth part BWP of index i of the user equipmentiContaining Y subbands, the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is as followsDetermined by the following formula:
Figure FDA0003426916240000011
wherein len _ bitmap represents a bit length of the bitmap,
Figure FDA0003426916240000012
is BWPiThe number of PRBs in the subband with middle index y,
Figure FDA0003426916240000013
is BWPiAnd the PRB starting index of the subband with the middle index of Y, i and Y are non-negative integers, and Y is a positive integer.
2. The method for determining downlink control channel resources according to claim 1, further comprising:
when the indication information comprises the REG numbers in each sub-band resource, determining a plurality of REG bundles based on the REG numbers in each sub-band resource, wherein the REG bundles with index i in the plurality of REG bundles comprise REGs with the number of i
Figure FDA0003426916240000014
Wherein the content of the first and second substances,
Figure FDA0003426916240000015
and the quantity of REGs of a control resource set CORESET in the subband resource subband is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
3. The method for determining downlink control channel resources according to claim 1 or 2, further comprising: and sending the indication information to the user equipment.
4. A method for acquiring downlink control channel resources is characterized by comprising the following steps:
receiving indication information sent by a network, wherein the indication information at least comprises one of the following items: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level;
extracting one or more of the following from the indication information: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level; when the indication information comprises the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by adopting a bitmap;
determining the frequency domain position of the control resource set in each subband resource according to each bit value in the bitmap, including: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values of a bitmap to indicate frequency domain positions of a set of control resources in the respective subband resources;
index i bandwidth part BWPiThe bitmap comprises Y subbands, and the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is determined according to the following formula:
Figure FDA0003426916240000021
wherein len _ bitmap represents a bit length of the bitmap,
Figure FDA0003426916240000022
is BWPiThe number of PRBs in the subband with middle index y,
Figure FDA0003426916240000023
is BWPiAnd the PRB starting index of the subband with the middle index of Y, i and Y are non-negative integers, and Y is a positive integer.
5. The method for acquiring downlink control channel resources according to claim 4, further comprising:
when the indication information comprises the REG numbers in each sub-band resource, determining a plurality of REG bundles based on the REG numbers in each sub-band resource, wherein the REG bundle with index i in the plurality of REGs comprises the REG number of I
Figure FDA0003426916240000024
Wherein the content of the first and second substances,
Figure FDA0003426916240000025
and the quantity of REGs of a control resource set CORESET in the subband resource sub-band is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
6. An apparatus for determining downlink control channel resources, comprising:
a first determining module, adapted to determine each sub-band resource of an available unlicensed frequency band, where the available unlicensed frequency band refers to an unlicensed frequency band available for a network and a user equipment;
a second determining module adapted to determine indication information based on the respective subband resources, the indication information comprising at least one of: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level;
when the indication information comprises the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by adopting a bitmap; the frequency domain position of the control resource set in each subband resource is determined based on: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part of the user equipment; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values of a bitmap to indicate frequency domain positions of a set of control resources in the respective subband resources;
bandwidth part BWP of index i of the user equipmentiThe bitmap comprises Y subbands, and the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is determined according to the following formula:
Figure FDA0003426916240000031
wherein len _ bitmap represents a bit length of the bitmap,
Figure FDA0003426916240000032
is BWPiThe number of PRBs in the subband with middle index y,
Figure FDA0003426916240000033
is BWPiAnd the PRB starting index of the subband with the middle index of Y, i and Y are non-negative integers, and Y is a positive integer.
7. The apparatus for determining downlink control channel resources according to claim 6, further comprising:
a third determining module, adapted to determine, when the indication information includes REG numbers in respective subband resources, multiple REG bundles based on the REG numbers in the respective subband resources, where the REG bundles with index i in the multiple REG bundles include REGs with number i
Figure FDA0003426916240000034
Wherein the content of the first and second substances,
Figure FDA0003426916240000035
and the quantity of REGs of a control resource set CORESET in the subband resource sub-band is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
8. The apparatus for determining downlink control channel resources according to claim 6 or 7, further comprising: a sending module adapted to send the indication information to the user equipment.
9. An apparatus for acquiring downlink control channel resources, comprising:
the receiving module is suitable for receiving indication information sent by a network, and the indication information at least comprises one of the following items: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level;
an extraction module adapted to extract from the indication information one or more of: the frequency domain position of a control resource set in each subband resource, the REG number in each subband resource, the CCE aggregation level in each subband resource and the number of candidate PDCCHs corresponding to the CCE aggregation level; when the indication information comprises the frequency domain position of the control resource set in each subband resource, the frequency domain position of the control resource set in each subband resource is indicated by adopting a bitmap;
a first determining module adapted to determine frequency domain positions of the control resource sets in the respective subband resources according to respective bit values in the bitmap, comprising: determining the frequency domain position of the control resource set in each subband resource according to each bit value in the bitmap, including: determining the starting PRB and the number of PRBs of each subband resource in each bandwidth part; determining the bit length of the bitmap based on the starting PRB and the number of PRBs of each subband resource; determining respective bit values of a bitmap to indicate frequency domain positions of a set of control resources in the respective subband resources;
index i bandwidth part BWPiThe bitmap comprises Y subbands, and the bit length of the bitmap determined based on the starting PRB and the number of PRBs of each subband resource is determined according to the following formula:
Figure FDA0003426916240000041
wherein len _ bitmap represents a bit length of the bitmap,
Figure FDA0003426916240000042
is BWPiThe number of PRBs in the subband with middle index y,
Figure FDA0003426916240000043
is BWPiAnd the PRB starting index of the subband with the middle index of Y, i and Y are non-negative integers, and Y is a positive integer.
10. The apparatus for acquiring downlink control channel resources according to claim 9, further comprising:
a second determining module, adapted to determine, when the indication information includes REG numbers in respective subband resources, multiple REG bundles based on the REG numbers in the respective subband resources, where a REG bundle with an index of i in the multiple REG bundles includes a REG number of i
Figure FDA0003426916240000051
Wherein the content of the first and second substances,
Figure FDA0003426916240000052
and the quantity of REGs of a control resource set CORESET in the subband resource subband is represented, L represents the quantity of REGs contained in the REG bundle with the index i, i is a non-negative integer, and L is a positive integer.
11. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method for determining downlink control channel resources according to any one of claims 1 to 3 or the method for acquiring downlink control channel resources according to claim 4 or 5.
12. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the method for determining downlink control channel resources according to any one of claims 1 to 3.
13. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the method for acquiring downlink control channel resources according to claim 4 or 5.
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Inventor after: Wang Hualei

Inventor before: Zhou Huan

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