WO2022022415A1 - Method executed by network node and user equipment, and device - Google Patents

Abstract

Provided in the present invention are a method executed by a network node and a user equipment, and a device. The method comprises: receiving indication information transmitted by a network node, the indication information comprising correlation information of at least two time-frequency resource blocks; and detecting a physical downlink control channel (PDCCH) on the basis of the indication information.

Description

Methods and devices performed by network nodes and user equipment technical field

The present invention relates to the technical field of wireless communication, and in particular, to a method performed by a network node and a user equipment and a corresponding device.

Background technique

This section introduces various aspects that may contribute to a better understanding of the present disclosure. Accordingly, the statements in this section should be read in this light and should not be construed as an admission of what is or is not prior art.

In the existing 5G/NR network, three typical service models are defined, enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable and low Delay service (Ultra-Reliable and Low Latency communication, URLLC). In addition to these types, there are time-sensitive communication (TSC) and so on.

An important goal of 5G is to realize an interconnected industry. 5G connectivity can serve as a catalyst for the next wave of industrial transformation and digitization, enhancing flexibility, increasing productivity and efficiency, reducing maintenance costs, improving operational safety, and more. Devices in this environment include pressure sensors, humidity sensors, thermometers, motion sensors, accelerometers, actuators, and the like. These sensors and actuators need to be connected to the 5G radio access network and core network. Large-scale industrial wireless sensor network (IWSN) use cases and requirements are described in documents such as TR 22.804, which include, in addition to URLLC services with very high demand, relatively low-end services that require smaller size, and/or wireless Years of battery life in state. The requirements for these services are higher than LPWA (Low Power Wide Area Network), but lower than URLCC and eMBB.

Similar to the internet industry, 5G connectivity can be a catalyst for the next wave of smart city innovation. As an example, TSR 22.804 describes smart city use cases and requirements. Smart cities vertically cover data collection and processing, which can more effectively monitor and control urban resources and provide services to urban residents. In particular, the deployment of surveillance cameras is an important part of smart cities, as well as factories and industries.

Finally, examples of wearable devices include smart watches/rings, eHealth related devices, medical monitoring devices, etc. A feature of this scenario is the compact size of the device required.

As a baseline, the requirements for these three use cases are:

General requirements:

Device complexity: The primary motivation for the new device type is to reduce device cost and complexity compared to eMBB and URLLC devices. This is especially the case with industrial sensors.

Device size: Most use cases require a compact device design.

Deployment scenario: The system should support all FR1/FR2 bands for FDD and TDD.

Use case specific requirements:

Industrial Wireless Sensors: Reference use cases and requirements are described in TR 22.832 and TS 22.104: Communication service availability is 99.99% and end-to-end latency is less than 100ms. The reference bit rate is less than 2Mbps (possibly asymmetric, such as upstream heavy load), and is stable for all use cases and devices. The battery should last at least a few years. For safety-related sensors, latency requirements are lower, 5-10ms (TR22.804)

Video Surveillance: In TSR 22.804, the reference economical video bit rate is 2-4Mbps, the delay is less than 500ms, and the reliability is 99%-99.9%. High-end video, such as agriculture requires 7.5-25Mbps. The business model may be UL transmission dominated.

Wearables: The reference bit rate for smart wearable applications can be 5-50 Mbps, in DL, a minimum of 2-5 Mbps. Devices have higher peak bit rates, say up to 150Mbps downlink, up to 50Mbps uplink. The device's battery should last 1-2 weeks.

The new demand scenario puts forward more requirements for network transmission, especially when the terminal device needs to obtain the receiving capability that matches the service under the condition of smaller size and lower processing complexity, which requires the existing air interface. The resource allocation method and the channel transmission method are improved.

The solution of this patent mainly includes a method for resource configuration, selection and mapping by a network node when sending downlink control signaling, and a method for how the terminal side detects signaling indication when receiving downlink control signaling.

prior art literature

Non-patent literature

Non-Patent Document 1: RP-193238, New SID on Support of Reduced Capability NR devices

Non-patent document 2: RAN1#101e, RAN1 Chairman's Notes, section 8.3

SUMMARY OF THE INVENTION

In order to solve at least part of the above problems, the present invention provides a method and device executed by a network node and user equipment, which enable the network node to effectively configure, select and map resources when sending downlink control signaling, so that the terminal The side effectively detects the signaling indication when receiving downlink control signaling.

According to a first aspect of the present invention, a method executed by a user equipment is proposed, including: receiving indication information sent by a network node; the indication information includes association information of at least two time-frequency resource blocks; according to the indication information Perform physical downlink control channel PDCCH detection.

According to the method of the first aspect of the present invention, in the at least two time-frequency resource blocks having the associated information, that is, the associated resource blocks, the CCE sequence numbers of the associated resource blocks, and/or The configured parameters are used to detect the physical downlink control channel PDCCH.

According to the method of the first aspect of the present invention, the association information is included in search space configuration information, and the search space configuration information includes information of at least one control resource set CORESET, and/or the association information.

According to the method of the first aspect of the present invention, the association information is not included in the search space configuration information, the association information indicates the relationship between the associated resource and at least one search space, or indicates that two or more search spaces do not overlap The association relationship between CORESET resource blocks of the control resource set.

According to the method of the first aspect of the present invention, in the detection based on the CCE sequence numbers of the control channel elements of the associated resource blocks, the CCE sequence numbers of the associated resource blocks are numbered respectively or consecutively.

According to the method described in the first aspect of the present invention, in the detection according to the configured parameters, for a certain candidate aggregation level AL subset configured in the search space, the control channel element CCE required by the AL is matched to the association At least one resource block of , in each resource block, calculate the parameters of the required candidate AL subset to determine the detected CCE sequence number; Calculations are performed over the entire set of associated resources to determine the detected CCE sequence numbers in the set of associated resources.

According to a second aspect of the present invention, an apparatus is proposed, comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, execute any one of the above-mentioned first aspects. method described.

Therefore, the present invention provides a method and device executed by a network node and user equipment, which can enable the network node to effectively configure, select and map resources when sending downlink control signaling, so that the terminal side can receive downlink control signaling. Signaling indication is effectively detected when

Description of drawings

The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic block diagram illustrating the method performed by the user equipment of the present invention.

FIG. 2 is a flowchart illustrating a method executed by a user equipment according to Embodiment 1 of the terminal side of the present invention.

FIG. 3 is a flowchart illustrating a method executed by a user equipment according to Embodiment 2 of the terminal side of the present invention.

FIG. 4 is a flowchart illustrating a method executed by a network node according to Embodiment 1 of the network side of the present invention.

FIG. 5 is a flow chart illustrating a method executed by a network node according to the second embodiment of the present invention on the network side.

FIG. 6 is a flow chart illustrating a method executed by a network node according to Embodiment 3 of the network side of the present invention.

FIG. 7 shows a block diagram of the user equipment UE involved in the present invention.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted in order to avoid obscuring the understanding of the present invention.

The following uses the 5G mobile communication system and its subsequent evolution versions as an example application environment to specifically describe various embodiments according to the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as communication systems after 5G and 3/4G mobile communication systems before 5G, 802.11 wireless networks, etc.

As used herein, the term "communication network" refers to a network conforming to any suitable communication standard, such as New Radio (NR), Long Term Evolution (LTE), LTE-Advanced, Wideband Code Division Multiple Access (WCDMA), High Speed Packet Access into (HSPA), etc. In addition, the communication between terminal devices and network nodes in the communication network may be performed according to any suitable communication protocols of various generations, including but not limited to first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), 4G, 4.5G, 5G communication protocols, and/or any other protocol currently known or developed in the future.

The term "network node" refers to a network device in a communication network through which end devices access the network and receive services from it. A network node may refer to a base station (BS), an access point (AP), a multi-cell/multicast cooperating entity (MCE), a controller or any other suitable device in a wireless communication network. The BS may be eg Node B (NodeB or NB), Evolved NodeB (eNodeB or eNB), Next Generation NodeB (gNodeB or gNB), Remote Radio Unit (RRU), Radio Head (RH), Remote Radio Head (RRH) , repeaters, low power nodes such as femto, pico, and the like.

Further examples of network nodes include multi-standard radio (MSR) radios such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTS), transmission points , transmission nodes, positioning nodes and/or the like. More generally, however, a network node may represent a network node capable of, configured, arranged and/or operable to enable and/or provide access to a wireless communication network by a terminal device or to provide certain Any suitable device (or group of devices) for the service.

The term "end device" refers to any end device that can access and receive services from a communications network. By way of example and not limitation, a terminal device may refer to a mobile terminal, user equipment (UE), or other suitable device. A UE may be, for example, a subscriber station, a portable subscriber station, a mobile station (MS), or an access terminal (AT). End devices may include, but are not limited to, portable computers, image capture end devices such as digital cameras, gaming end devices, music storage and playback devices, mobile phones, cellular phones, smart phones, tablet computers, wearable devices, personal digital assistants (PDAs) ), vehicles, etc.

As yet another specific example, in an Internet of Things (IoT) scenario, an end device may also be referred to as an IoT device and means performing monitoring, sensing and/or measurement, etc. and integrating such monitoring, sensing and/or measurement, etc. A machine or other device that sends the results to another end device and/or network device. In this case, the end device may be a Machine-to-Machine (M2M) device, which may be referred to as a Machine Type Communication (MTC) device in the 3rd Generation Partnership Project (3GPP) context.

As a specific example, the terminal device may be a UE implementing the 3GPP Narrowband Internet of Things (NB-IoT) standard. Specific examples of such machines or devices are sensors, metering devices such as power meters, industrial machinery, or household or personal appliances such as refrigerators, televisions, personal wearable devices such as watches, and the like. In other scenarios, an end device may represent a vehicle or other device, eg, a medical instrument capable of monitoring, sensing, and/or reporting, etc., its operational status or other functions related to its operation.

As used herein, the terms "first," "second," etc. refer to different elements. The singular forms "a" and "an" are intended to include the plural forms as well, unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing", "having", "covering" and/or "encompassing" as used herein designate the presence of stated features, elements and/or components, etc., but do not preclude the presence or addition of a or multiple other features, elements, components and/or combinations thereof. The term "based on" should be understood as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be understood as "at least one embodiment." The term "another embodiment" should be understood to mean "at least one other embodiment." Other (explicit and implicit) definitions may be included below.

Part of the terms involved in the present invention are described below. Unless otherwise specified, the terms involved in the present invention are defined here. The terms given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR and later or other communication systems, but unified terms are adopted in the present invention, and when applied to specific systems can be replaced with terms used in the corresponding system.

3GPP: 3rd Generation Partnership Project

LTE: Long Term Evolution, long term evolution technology

NR: New Radio, new wireless, new air interface

PDCCH: Physical Downlink Control Channel, physical downlink control channel

DCI: Downlink Control Information, downlink control information

PDSCH: Physical Downlink Shared Channel, physical downlink shared channel

UE: User Equipment, user equipment

eNB: evolved NodeB, evolved base station

gNB: NR base station

TTI: Transmission Time Interval, transmission time interval

OFDM: Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing with Cyclic Prefix

C-RNTI: Cell Radio Network Temporary Identifier, the temporary identifier of the cell wireless network

CSI: Channel State Information, channel state information

HARQ: Hybrid Automatic Repeat Request, hybrid automatic repeat request

CSI-RS: Channel State Information Reference Signal, channel state information reference signal

CRS: Cell Reference Signal, cell-specific reference signal

PUCCH: Physical Uplink Control Channel, physical uplink control channel

PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

UL-SCH: Uplink Shared Channel, uplink shared channel

CG: Configured Grant, configure scheduling permission

MCS: Modulation and Coding Scheme, modulation and coding scheme

RB: Resource Block, resource block

RE: Resource Element, resource unit

CRB: Common Resource Block, common resource block

CP: Cyclic Prefix, cyclic prefix

PRB: Physical Resource Block, physical resource block

FDM: Frequency Division Multiplexing, frequency division multiplexing

RRC: Radio Resource Control, Radio Resource Control

RSRP: Reference Signal Receiving Power, reference signal receiving power

SRS: Sounding Reference Signal, sounding reference signal

DMRS: Demodulation Reference Signal, demodulation reference signal

CRC: Cyclic Redundancy Check, Cyclic Redundancy Check

SFI: Slot Format Indication, slot format indication

TDD: Time Division Duplexing

FDD: Frequency Division Duplexing, frequency division duplexing

SIB1: System Information Block Type 1, system information block type 1

PCI: Physical Cell ID, physical cell identification

PSS: Primary Synchronization Signal, the main synchronization signal

SSS: Secondary Synchronization Signal, secondary synchronization signal

BWP: BandWidth Part, Bandwidth Fragment/Part

GNSS: Global Navigation Satellite System, global navigation satellite positioning system

SFN: System Frame Number, system (wireless) frame number

IE: Information Element, information element

SSB: Synchronization Signal Block, synchronization system information block

EN-DC: EUTRA-NR Dual Connection, LTE-NR dual connection

MCG: Master Cell Group, the main cell group

SCG: Secondary Cell Group, secondary cell group

PCell: Primary Cell, the main cell

SCell: Secondary Cell, secondary cell

SPS: Semi-Persistant Scheduling, semi-static scheduling

TA: Timing Advance, uplink timing advance

PT-RS: Phase-Tracking Reference Signals, phase tracking reference signal

TB: Transport Block, transport block

CB: Code Block, coding block/code block

QPSK: Quadrature Phase Shift Keying, quadrature phase shift keying

16/64/256 QAM: 16/64/256 Quadrature Amplitude Modulation, Quadrature Amplitude Modulation

AGC: Auto Gain Control, automatic gain control

TDRA(field): Time Domain Resource Assignment, time domain resource allocation indication (field)

FDRA(field): Frequency Domain Resource Assignment, frequency domain resource allocation indication (field)

ARFCN: Absolute Radio Frequency Channel Number, absolute radio frequency channel number

RedCap Device: Reduced Capability Device

CORESET: Control resource set, control resource set

CCE: Control channel element, control channel element

REG: Resource Element Group, resource unit group

MIB: Master Information Block, the main information block

DRX: Discontinuous Reception, discontinuous reception

AL: Aggregation Level, aggregation level

UCI: Uplink Control Information, uplink control information

CSS: Common search space, common search space

USS: UE-specific search space, user search space

SCS: sub-carrier spacing, sub-carrier spacing

The following is a description of the prior art associated with the aspects of the present invention. Unless otherwise specified, the meanings of the same terms in the specific embodiments are the same as those in the prior art.

The network node indicates the behavior of the terminal by sending DCI information to the terminal. For example, the network node can use DCI format 0_0/0_1/0_2 to schedule uplink data transmission, and can also use DCI format 1_0/1_1/1_2 and other formats to perform downlink data transmission. For scheduling, you can also use DCI format2_0/2_1/.../2_6, etc. and DCI format3_0/3_1, etc. to perform other data transmission or control message instructions. The DCI message includes but is not limited to the specific types mentioned above, and may be extended or changed, but does not affect the implementation of the method involved in the present invention.

The network node adds CRC check bits to the DCI information to be transmitted, and performs scrambling, and then performs channel coding and rate matching according to the size of the PDCCH transmission time-frequency resources, and maps them to the corresponding RE time-frequency resources through scrambling and modulation. to transmit.

FIG. 1 is a schematic block diagram illustrating the method performed by the user equipment of the present invention.

As shown in FIG. 1 , the terminal device uses the parameters configured on the network side to perform PDCCH demodulation and DCI detection on the indicated resources according to certain rules. If valid DCI is detected, the terminal performs data transmission or other related actions according to the content indicated by the DCI.

A unit of time-frequency resources in NR is a time slot, and a time slot contains 14 (Normal CP scenario) or 12 (Extended CP scenario) OFDM symbols. The resources within a time slot can be further divided into resource blocks and resource units. The resource block RB can be defined in the frequency domain as

consecutive sub-carriers, eg, for a sub-carrier spacing (SCS) of 15 kHz, one RB is 180 kHz in the frequency domain. For a subcarrier spacing of 15 kHz×2 ^μ , the resource element RE represents 1 subcarrier in the frequency domain and 1 OFDM symbol in the time domain. Under different subcarrier parameter configurations, μ can take an integer value from 0 to 4, or be extended to more ranges. The size of the available RB resource block is related to the size of the bandwidth supported by data transmission. For example, the total bandwidth size is 20 MHz, then for the SCS of 30 kHz, the number of available RBs is less than 55.

Several REs may form one REG, for example, 12 REs form one REG, that is, one REG includes one symbol in the time domain and 12 subcarriers in the frequency domain. Several REGs can form a CCE according to the configuration and rules. For example, each 6 REGs on one continuous symbol in the time domain form a CCE containing 6 REGs, or each 3 REGs on two consecutive symbols in the time domain form a CCE containing 6 REGs. A CCE of 6 REGs, or 2 REGs each on 3 consecutive symbols in the time domain constitute a CCE including 6 REGs. The combinations include but are not limited to the specific types mentioned above, and may be extended or changed, but do not affect the implementation of the methods involved in the present invention.

The network side indicates the combination mode of CCEs by configuring CORESET information, such as configuring the frequency domain location and bandwidth of CORESET, the length of consecutive symbols of CORESET, and the mapping parameters of CCE-REG. The terminal can obtain the position and combination mode of the RE resources corresponding to each CCE in the CORESET according to the configuration parameters, and determine the sequence number of each CCE in the CORESET resource block, and the like.

The network may use several CCEs to transmit one PDCCH, and the number of CCEs may be called an aggregation level (AL). A PDCCH can be transmitted using CCEs of various aggregation levels to meet different requirements. For example, using CCEs of different aggregation levels to transmit PDCCH can obtain different transmission performance. For example, for a given size of DCI, under the same transmission conditions, using AL=8 can obtain a lower transmission code rate than using AL=4, thereby achieving better transmission performance. In other words, under the same receiving performance requirements, the capability of the terminal receiver can be further reduced, thereby simplifying the design of the terminal receiver.

The network may configure one or more candidate ALs for the terminal device, and one candidate AL may correspond to multiple CCEs on one CORESET resource block. The UE detects the candidate ALs respectively.

After the DCI information to be sent on the network side is encoded, scrambled, rate matched, etc., it can be carried on the PDCCH channel for transmission. For different terminals, different DCI contents, and different service states and requirements, the network node can carry the DCI on the PDCCH of different ALs, and the terminal can detect various possible situations according to the configured parameters. When the detection result complies with certain criteria, for example, the CRC check after descrambling is correct, it can be considered that the DCI is valid information, and further actions can be performed according to the content of the DCI, otherwise no relevant actions are performed.

The network uses the search space parameters to determine multiple possible positions of the PDCCH to be transmitted in the time-frequency resource block. When there is a PDCCH transmission requirement, the network node selects one of them for transmission.

The terminal uses the configuration of the search space when performing PDCCH detection. According to the configuration of the search space, the terminal may determine at least the time-frequency position of the resource block indicated by the CORESET configuration, and the number of candidate sets of at least one AL. The terminal calculates detection parameters according to the configuration of CORESET, candidate set parameters, and other configurations such as carrier sequence number, C-RNTI parameters, etc., and performs PDCCH detection on the target resource block. Different detection requirements may be supported for different configurations. For example, for some types of PDCCH, the aggregation level of 4/8/16 is supported, and for other types of PDCCH, the aggregation level of 1/2/4/8/16 is supported.

The network side can instruct the terminal to perform detection on the associated resource set, and use schemes such as offset to achieve benefits such as reducing terminal complexity and improving terminal performance or network performance.

Hereinafter, specific examples, embodiments, and the like according to the present invention will be described in detail. In addition, as mentioned above, the example, the Example, etc. which are described in this disclosure are illustrative descriptions for easy understanding of this invention, and do not limit this invention.

[Example on the terminal side]

[Example 1]

FIG. 2 shows a schematic diagram of a basic process of a method performed by a user equipment according to Embodiment 1 of the terminal side of the present invention.

Hereinafter, the method executed by the user equipment in this embodiment of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 2 .

As shown in FIG. 2, in the embodiment of the present invention, the steps performed by the user equipment include:

In step S101, the user equipment receives the indication information sent by the network node, optionally, the indication information includes association information of at least two time-frequency resource blocks.

Optionally, the association information is included in search space configuration information. The search space configuration information includes at least one CORESET information, such as the CORESET sequence number. Through the information, the terminal can obtain the configuration of the CORESET, and determine the configuration information of the CORESET resource block in the search space. The search space configuration information includes association information, indicating the association relationship between two or more non-overlapping CORESET resource blocks in the search space. Optionally, two or more CORESET resource blocks on different symbols in a time slot are configured according to CORESET. The corresponding resource blocks, or two or more resource blocks on the same symbol in different time slots are configured according to CORESET, or two or more resource blocks on different symbols in different time slots are configured according to CORESET. Optionally, the associated resource blocks use the same or different CORESET configurations.

Optionally, the association information is not included in the search space configuration information. The association information indicates the relationship of the associated resource to at least one search space. Optionally, the association information indicates an identifier of the search space. The association information indicates the association relationship between two or more non-overlapping CORESET resource blocks in the search space, such as two or more resource blocks corresponding to CORESET configurations on different symbols in a time slot, or different time slots Two or more resource blocks on the same symbol are configured according to CORESET, or two or more resource blocks on different symbols in different time slots are configured according to CORESET. Optionally, the associated resource blocks use the same or different CORESET configurations.

The association information indicates how the resource blocks are associated. Optionally, the time unit associated with the resource block is indicated, and multiple resources within the same time unit are associated resource blocks. Optionally, the indicated time unit is a time slot, that is, multiple resource blocks in a time slot are associated resource blocks. For example, a bitmap is used in the search space configuration to indicate the starting symbol positions of multiple resource blocks, 1 is used in the bitmap to indicate the first symbol of a valid resource block, and the terminal determines the resource to which the symbol belongs according to the CORESET configuration. block configuration. Then the multiple resource blocks indicated by the bitmap are associated resource blocks. Optionally, the indicated time unit is the number N, that is, N consecutive resource blocks are associated resource blocks. Optionally, the indicated time unit is a period, that is, a resource block within a PDCCH detection period is an associated resource block. Optionally, the indicated time unit is the number of shares M, the terminal may divide the resources in the detection period into M shares, and the resources in each share are associated resource blocks.

Optionally, the association information indicates the sequence number of the resource block, and the resource block conforming to the sequence number relationship of the resource block is the associated resource block. For example, resources with the same sequence number modulo 2 are associated resource blocks. Optionally, the association information indicates the number N of resource blocks, and consecutive N resource blocks are associated resource blocks. Optionally, the association information indicates the number of repetitions M of resource blocks, and M consecutive valid resource blocks are associated resource blocks.

In step S102, the terminal device detects the PDCCH on the associated resource block. In the associated resource block, the terminal device can detect the PDCCH according to the CCE sequence number of the associated resource block.

Optionally, the CCEs in each resource block are numbered separately. For example, the sequence numbers are from 0 to _{NCCE, i} -1, _{NCCE, i} is the number of CCEs in resource block i, and each CCE sequence number corresponds to one CCE in the resource block.

The terminal equipment uses the sequence number of the CCE to perform PDCCH detection. For example, for a certain candidate AL subset configured in the search space, the terminal matches the CCEs required by the AL to the associated B resource blocks. For example, a PDCCH with AL=L needs L CCEs for transmission, and the terminal detects L/B CCEs in each resource block in the associated resource set during a detection of AL=L. In each resource block, the terminal calculates the parameters of the required candidate subset, and determines the sequence number of the detected CCE. Exemplarily, according to formula (1), the calculation of the sequence number of the CCE to be detected in each resource block of AL=L is performed,

in,

The CORESET p associated with this resource is in

The parameter of the subframe is always 0 for the CSS space, and is related to the slot number where the resource is located and the initial value for the USS space, and the initial value is usually the C-RNTI of the terminal.

is the candidate PDCCH sequence number under the corresponding configuration that the terminal needs to detect in the candidate subset of aggregation level L.

The maximum number of candidate PDCCHs needs to be detected in the search space s on all configured carriers for the terminal. N _{CCE, p, bi} is the total number of CCEs on the bi-th associated resource set. n _CI is the carrier sequence number when the terminal is configured to detect the control information of multiple serving cells in this space. i _bi is the sequence number of L/B CCEs on the resource block.

Optionally, the CCEs of the associated resource blocks are numbered consecutively. Optionally, the numbering is performed in a resource block-first manner, firstly, numbering the resources in the first associated resource block in the associated resources, and then sequentially numbering the resources in the next associated resource block. The CCE sequence numbers of one resource block are 0 to N _{CCE, 0-1} , the CCE sequence numbers of the second resource block are N _{CCE, 0} to N _{CCE, 0} +N _{CCE, 1-1} , and so on. Optionally, the associated resource blocks are prioritized in the time domain, for example, in the case of including two resource blocks, the first CCE sequence number of the first resource block is 0, the first CCE sequence number of the second resource block is 1, and the first resource block is 1. The second CCE sequence number of the block is 2, and so on.

In addition, the terminal device performs detection on the associated resource block according to the configured parameters. For a certain AL configured, the CCE required by the AL is calculated on the entire associated resource set. The NN _CCE is the total number of CCEs in the associated resource set, and the sequence number of the CCE to be detected in the associated resource set is calculated according to formula (2),

NN _CCE is the number of CCEs in the associated resource set, and the specific value is related to the configuration method of the associated resource set. The optional number of CCEs in the associated resource set is the sum of the CCEs of each resource block ∑ _bi N _CCE,p,bi , optionally is the product of the number of CCEs in the first resource block and the number of resource blocks, optionally the product of the number of the smallest resource block CCEs in the associated resource set and the number of resource blocks.

The CORESET p associated with this resource is in

Subframe parameter, optional, p0 is the CORESET sequence number corresponding to the first resource block.

Optionally, the network configures an aggregation level L of resource blocks in each resource of the UE, and for an associated resource set including B resource blocks, the number of available CCEs corresponding to each aggregation level L is LB. The terminal device calculates the sequence number of the CCE to be detected according to the configuration of each resource set such as formula (3).

where bi is the sequence number of the resource block in the associated resource set.

[Example 2]

FIG. 3 shows a schematic diagram of a basic process of a method executed by a user equipment according to Embodiment 2 of the terminal side of the present invention.

As shown in FIG. 3 , in this embodiment of the present invention, after step S101 shown in FIG. 2 , the following step S103 may be further included, for example.

In step S103, the terminal device uses the offset to calculate the sequence number of the CCE to be detected. Optionally, the offset is the number of CCEs. When the terminal acquires the sequence numbers of the candidate CCEs for PDCCH detection, it uses the offset and adjusts the offset sequence numbers to be within the range of available CCE sequence numbers.

Exemplarily, the terminal uses XL as the offset when searching for the convergence level _L , and the following formula (4) calculates the sequence number of the CCE to be detected.

Optionally, the offsets for different Ls are the same. The terminal uses an offset to be used in different L search subsets. Optionally, the offsets of different Ls are configured independently, and the terminal uses its own offsets for the search subsets of different Ls.

Optionally, the offset is the number of reference CCEs. Exemplarily, with reference to the offset X, the subcarrier spacing μ ₀ is used accordingly. When the PDCCH is transmitted with a parameter of subcarrier spacing of μ ₁ , the actual offset used is

Optionally, the offset is the number of aggregation levels. Exemplarily, when calculating the sequence number of each candidate CCE with AL= _L , the offset XL is used as the offset when searching for the convergence level L, and the following formula (5) calculates the sequence number of the CCE to be detected,

The terminal equipment performs PDCCH detection on the CCE to be detected.

Optionally, this embodiment is used in combination with the previous embodiment (as shown in the dashed box in FIG. 3 ). For example, when configuring the associated resource set for use, the terminal offsets the CCE sequence number on each resource block, and The sequence number after adjusting the offset is within the available range. The following formula (6),

The terminal uses the adjusted CCE sequence number to perform PDCCH detection.

Optionally, the CCE sequence number offset may be used when the associated resource set uses joint numbering. The following formula (7),

The terminal offsets the CCE sequence numbers of the associated resource blocks, and adjusts the offset sequence numbers to be within the available range. The terminal uses the adjusted CCE sequence number to perform PDCCH detection.

Optionally, the offset is the number of REGs or the number of RBs.

For example, when devices with different bandwidths share one bandwidth, their search space resources may partially overlap. Exemplarily, the UE configures a CORESET resource larger than its BWP bandwidth, and configures an offset. The terminal uses the offset to detect CCE resources within the BWP bandwidth. The offset uses the distance between the CORESET bandwidth and the BWP bandwidth, and the unit is the number of REGs or the number of RBs. REG numbers may be counted as REGs or REG bundles.

The offset setting can effectively avoid the scenarios where CCEs with smaller sequence numbers may conflict or compete when different terminals are retrieving CCE resources, which can effectively reduce the power consumption or implementation complexity of the terminals.

[Example 3]

The terminal device performs DCI information detection on the associated resource set. Optionally, merge detection is performed on the associated resource set. For example, after the terminal device demodulates the CCEs on the associated resource set corresponding to the detection subset AL=L, the terminal device concatenates the demodulated code streams according to the sequence of resource blocks. The terminal detects the concatenated code stream and checks the CRC.

Optionally, the associated resource sets are detected separately. After the terminal device demodulates the CCEs corresponding to the detection subset AL=L on each resource block, the demodulated code streams are separately detected.

The terminal determines the size of the DCI resource blocks in the candidate subset on each resource block.

Optionally, the terminal determines the size of the DCI on the resource block according to the position of the resource block. Optionally, the terminal determines the size of the DCI on the resource block according to the indication of the network signaling and the position of the resource block. The signaling indicates the correspondence between the cells in the DCI and the resource blocks in the associated resource set, so as to determine the coding and resource mapping of each cell. Exemplarily, the signaling may use 1-bit information to indicate each cell whose length is not 0 in the DCI. Bit 1 indicates that the information element is transmitted on the first resource block in the associated resource set, and bit 0 indicates that the information element is not transmitted on the first resource block in the associated resource set. Alternatively, bit 0 indicates that the information element is transmitted on the first resource block in the associated resource set, and bit 1 indicates that the information element is not transmitted on the first resource block in the associated resource set. The terminal device determines the size of the DCI on the resource block according to the signaling indication and the location of the resource block, and aligns the DCI with other DCI types.

Optionally, the terminal determines the size of the DCI according to the position of the resource block. The terminal divides the DCI into M equal parts according to the number M of resource blocks in the associated resource set. If the length of the DCI is not divisible by M, several placeholder bits are padded at the end or head of the DCI so that it can be divided into M equal parts. The terminal determines the size of the DCI in each resource block according to the sequence number of the resource block.

Optionally, the terminal determines the AL detection subset according to the position of the resource block. For example, the terminal determines that the detection subset of AL<X is detected in the first resource block, and the detection subset of AL>=X is detected in the remaining resource blocks. .

[Example 4]

The terminal device performs data transmission according to the position of the resource block on the associated resource set. Optionally, data transmission is performed according to the position of the last resource block. For example, the DCI detected by the terminal device on the associated resource set includes the indicated transmission delay k of the scheduling data or an index related to the delay k. The terminal determines the starting position of the uplink or downlink traffic channel to be transmitted according to the position of the last resource block in the associated resource set where the detected DCI is located and the transmission delay indicated in the DCI. Optionally, the terminal device performs data transmission according to the position of the first resource block. The terminal determines the starting position of the uplink or downlink traffic channel to be transmitted according to the position of the first resource block in the associated resource set where the detected DCI is located and the transmission delay indicated in the DCI.

[Network side embodiment]

[Example 1]

FIG. 4 shows a schematic diagram of a basic process of a method performed by a network node according to the first embodiment of the present invention on the network side.

Hereinafter, the method executed by the network node in this embodiment of the present invention will be described in detail with reference to the basic process diagram shown in FIG. 4 .

As shown in FIG. 4, in the embodiment of the present invention, the steps performed by the network node include:

In step S201, the network node determines the resource location of the PDCCH sent to the terminal device using the search space configuration. The search space configuration information includes at least one CORESET information, such as a CORESET sequence number. Through the information, the network node determines the configuration of the CORESET, and determines the resource block configuration information in the search space. The network node uses the association information to determine the association relationship between two or more non-overlapping CORESET resource blocks in the search space, such as two or more resource blocks corresponding to CORESET configuration on different symbols in a time slot, Or two or more resource blocks on the same symbol in different time slots are configured according to CORESET, or two or more resource blocks on different symbols in different time slots are configured according to CORESET. Optionally, the associated resource blocks use the same or different CORESET configurations.

The network node determines how the resource blocks are associated. Optionally, the network uses the time unit associated with the resource blocks, and multiple resources within the same time unit are associated resource blocks. A specific example is that in the search space configuration, a bitmap is used to indicate the starting symbol positions of multiple resource blocks, and 1 is used in the bitmap to indicate the first symbol of a valid resource block. The network node determines from the first symbol according to the CORESET configuration. The configuration of the resource block to which the symbol belongs. Optionally, the indicated time unit is a time slot, that is, multiple resource blocks in a time slot are associated resource blocks. Optionally, the indicated time unit is the number N, that is, N consecutive resource blocks are associated resource blocks. Optionally, the indicated time unit is a period, that is, a resource block within a PDCCH detection period is an associated resource block. Optionally, the indicated time unit is the number of shares M, the network node may divide the resources in the detection period into M shares, and the resources in each share are associated resource blocks.

In step S202, the network node determines the location of the candidate PDCCH in the associated resource block. Optionally, the CCEs of each resource block are numbered separately, for example, the serial numbers are from 0 to N _{CCEs, i} -1, and N _CCEs are the number of CCEs in each resource block i.

The network node determines the PDCCH transmission resources on the associated resource block, optionally, determines according to the configured search space parameters, and matches the resources required by the AL to the associated B resources for a certain candidate AL subset configured in the search space On the block, for example, the PDCCH with AL=L needs L CCEs for transmission, and the network node determines L/B CCEs in each resource block in the associated resource set. In each resource block, the network node calculates the parameters of the required candidate subset to determine the sequence number of the candidate CCE. An optional way is to calculate the CCE sequence number in each resource block of AL=L according to formula (8),

in,

The CORESET p associated with this resource is in

The parameters of the subframe are always 0 for the CSS space, and are related to the time slot number where the resource is located and the initial value for the USS space, and the initial value is usually the C-RNTI of the target terminal.

is the candidate PDCCH sequence number under the corresponding configuration that the terminal needs to detect in the candidate subset of aggregation level L.

It is necessary to detect the maximum number of candidate PDCCHs in the search space s on the configured carrier for the terminal. N _{CCE, p, bi} is the total number of CCEs on the bi-th associated resource set. n _CI is the carrier sequence number when the terminal is configured to detect the control information of multiple serving cells in this space. i _bi is the sequence number of L/B CCE units in the resource block. The network node determines the CCE position of the candidate PDCCH according to the CCE sequence number.

Optionally, the CCEs of the associated resource blocks are numbered consecutively. Optionally, the numbering is performed in a resource block-first manner. First, the resources in the first associated resource block in the associated resources are numbered, and then the CCEs in the next associated resource block are sequentially numbered. The CCE sequence numbers of one resource block are 0 to N _{CCE, 0-1} , the CCE sequence numbers of the second resource block are N _{CCE, 0} to N _{CCE, 0} +N _{CCE, 1-1} , and so on. Optionally, the associated resource blocks are prioritized in the time domain, for example, in the case of including two resource blocks, the first CCE sequence number of the first resource block is 0, and the first CCE sequence number of the second resource block is 1.

In step S203, the network node determines the information of available CCEs on the associated resource block, optionally according to the configured parameters, and calculates the CCE resources required by the AL on the associated resource set for a configured AL. The NN _CCE is the total number of CCEs in the associated resource set, and the sequence number of the CCE to be detected in the associated resource set is calculated according to formula (9).

where NN _CCE is the number of CCEs in the associated resource set, optionally the sum of each resource block CCE ∑ _bi N _CCE,p,bi , optionally the product of the number of CCEs in the first resource block and the number of resource blocks, Optionally, it is the product of the number of the smallest resource block CCE in the associated resource set and the number of resource blocks.

[Example 2]

FIG. 5 shows a schematic diagram of a basic process of a method executed by a network node according to the second embodiment of the present invention on the network side.

As shown in FIG. 5 , in this embodiment of the present invention, after steps S201 , S202 , and S203 shown in FIG. 4 , the following step S204 may be further included, for example.

In step S204, optionally, the network node uses the offset to calculate the sequence number of the CCE required by the candidate PDCCH. Optionally, the unit of the offset is the number of CCEs. The network node uses the offset when acquiring the sequence numbers of the candidate CCEs for PDCCH detection, and adjusts the offset sequence numbers to be within the range of available CCE sequence numbers.

Exemplarily, the network node uses XL as the offset parameter when searching for the aggregation level _L , and the following formula (10) calculates the detected CCE sequence number.

Optionally, the offset is the number of reference CCEs. Exemplarily, with reference to the offset X, the subcarrier spacing μ ₀ is used accordingly. When the PDCCH is transmitted with a parameter of subcarrier spacing of μ ₁ , the actual offset used is

Optionally, it can be used in combination with the previous embodiment, for example, in the scenario of associated resource sets, the network node offsets the CCE sequence number on each resource block, and adjusts the offset sequence number to be within the available range. The following formula (11),

Optionally, CCE sequence number offset may be used during joint numbering. The following formula (12),

[Example 3]

FIG. 6 shows a schematic diagram of a basic process of a method executed by a network node according to Embodiment 3 of the network side of the present invention.

As shown in FIG. 6 , in this embodiment of the present invention, after steps S201 , S202 , S203 , and S204 shown in FIG. 5 , the following step S205 may be further included, for example.

In step S205, the network node performs mapping of the DCI information to be sent on the selected CCE. Optionally, the network node performs CRC check on the DCI information bits, and matches the coding and rate to the length of the code stream corresponding to the aggregation level used in this transmission. The mapping of RE resources is performed sequentially.

Optionally, the network node divides the DCI information to be transmitted into M equal lengths, where M is the number of resource sets in the associated resource set. If the length of the DCI is not divisible by M, several placeholder bits are padded at the end or head of the DCI so that it can be divided into M equal parts. The network node performs CRC check and scramble for each share, and matches the coding and rate to the length of the code stream corresponding to the convergence level L/M, and then selects the CCE on each resource block according to the frequency domain first and then the time domain. Sequentially maps to related RE resources.

Optionally, the network node indicates the correspondence between the information elements in the DCI and the resource blocks in the associated resource set, and determines the coding and resource mapping of each information element. The network indicates 1-bit information for each cell whose length is not 0 in the DCI to be sent. Optionally, bit 1 indicates that the information element is transmitted on the first resource block in the associated resource set, and bit 0 indicates that the information element is not transmitted on the first resource block in the associated resource set. Alternatively, bit 0 indicates that the information element is transmitted on the first resource block in the associated resource set, and bit 1 indicates that the information element is not transmitted on the first resource block in the associated resource set. The network performs CRC check on the information elements transmitted on each resource block, and matches the coding and rate to the code stream length determined by the selected CCE on the resource block. The scrambled and modulated code stream is mapped on the selected resources one by one RE resource in the order of frequency domain first and then time domain.

Optionally, the network node performs mapping according to the aggregation level used by the PDCCH in each resource block. The network node performs CRC check on the DCI information bits to be sent, and encodes and rate matches the code stream length corresponding to the aggregation level used on each resource block. The scrambled and modulated code stream is on the selected resource. The mapping of RE resources one by one is performed in the order of frequency domain first and then time domain.

FIG. 7 is a block diagram showing a user equipment UE according to the present invention. As shown in FIG. 7 , the user equipment UE80 includes a processor 801 and a memory 802 . The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 802 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, or the like. Program instructions are stored on the memory 802 . When the instructions are executed by the processor 801, the above method described in detail in the present invention and executed by the user equipment can be executed.

The method and related apparatus of the present invention have been described above with reference to the preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the various embodiments described above can be combined with each other under the condition that no contradiction occurs. The method of the present invention is not limited to the steps and sequences shown above. The network node and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, and so on. The various identifiers shown above are only exemplary and not restrictive, and the present invention is not limited to the specific information elements exemplified by these identifiers. Numerous changes and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both. For example, the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.

In this application, "network equipment" may refer to a mobile communication data and control switching center with larger transmit power and wider coverage area, including base stations or micro base stations, etc. The network equipment has functions such as resource allocation and scheduling, data reception and transmission, etc. "User equipment" may refer to a user mobile terminal, for example, including a mobile phone, a notebook, and other terminal equipment that can wirelessly communicate with a base station or a micro base station.

Furthermore, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is a product having a computer-readable medium on which computer program logic is encoded that, when executed on a computing device, provides relevant operations to achieve The above technical solutions of the present invention. When executed on at least one processor of a computing system, computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. Such arrangements of the present invention are typically provided as software, code and/or other data structures arranged or encoded on a computer readable medium such as an optical medium (eg CD-ROM), floppy or hard disk, or such as one or more Firmware or other medium of microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.

In addition, each functional module or each feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits. Circuits designed to perform the various functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs) or other Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by digital circuits, or may be configured by logic circuits. In addition, when an advanced technology that can replace the current integrated circuit appears due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by using the advanced technology.

Although the present invention has been shown in conjunction with the preferred embodiments thereof, those skilled in the art will appreciate that various modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. Therefore, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.

Claims (7)

1. A method performed on a terminal device, comprising:

   Receive the indication information sent by the network node;

   Perform physical downlink control channel PDCCH detection according to the indication information;

   The indication information includes association information of at least two time-frequency resource blocks.
2. The method of claim 1, wherein:

   In the at least two time-frequency resource blocks with the associated information, that is, the associated resource blocks, the physical downlink control channel PDCCH is detected according to the CCE sequence numbers of the associated resource blocks and/or the configured parameters.
3. The method of claim 1, wherein:

   The association information is included in the search space configuration information,

   The search space configuration information includes at least one control resource set CORESET information and/or the associated information.
4. The method of claim 1, wherein:

   The association information is not included in the search space configuration information,

   The association information indicates a relationship between an associated resource and at least one search space, or indicates an association relationship between two or more non-overlapping control resource sets CORESET resource blocks in the search space.
5. The method of claim 1, wherein:

   In the detection according to the CCE sequence number of the associated resource block,

   The CCE sequence numbers of the associated resource blocks are respectively numbered or consecutively numbered.
6. The method of claim 1, wherein:

   In the detection according to the configured parameters,

   For a certain candidate aggregation level AL subset configured in the search space, match the control channel element CCE required by the AL to at least one associated resource block, and in each resource block, calculate the parameters of the required candidate AL subset to obtain determine the CCE sequence number detected; or

   For a certain aggregation level AL configured, the control channel element CCE required by the AL is calculated on the entire associated resource set to determine the detected CCE sequence number in the associated resource set.
7. A device comprising:

   processor; and

   memory, storing instructions,

   wherein the instructions, when executed by the processor, perform the method of any of claims 1-6.

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