CN111586853A - Wireless communication method and device - Google Patents

Abstract

The application provides a method and a device for wireless communication, wherein the method comprises the following steps: the terminal equipment determines a first search space set according to the number of currently used receiving antennas; the terminal device detects the downlink control channel according to the first search space set, so that the terminal device can select the search space set to perform PDCCH detection according to the number of currently used antennas, and can flexibly cope with different data flows.

Description

A method and apparatus for wireless communication

technical field

The embodiments of the present application relate to the field of communication, and more particularly, to a method and apparatus for wireless communication and a communication device.

Background technique

In order to reduce the complexity of blind detection of downlink control channels, the access device may configure one or more search space sets (Search Space Sets) for the terminal device, wherein each search space set includes search spaces of one or more aggregation levels.

In the prior art, the search space set is semi-statically configured by the access device. However, the number of traffic changes dynamically, and the semi-statically configured search space set cannot adapt to the dynamic change of the data traffic, which may increase the communication delay , reducing the reliability of communication and affecting user experience.

SUMMARY OF THE INVENTION

The present application provides a method and device for wireless communication, which can adapt to dynamic changes in quantity traffic, reduce communication delay, improve communication reliability, and improve user experience.

A first aspect provides a wireless communication method, comprising: a terminal device determining a first search space set according to the number of currently used receiving antennas; and the terminal device detecting a downlink control channel according to the first search space set .

According to the solution provided in this application, the terminal device can select a search space set for PDCCH detection according to the number of antennas currently in use, and can flexibly cope with different data traffic. For example, the search space set corresponding to a larger number of antennas has a smaller detection period, Therefore, the reliability of data transmission can be ensured and the transmission delay can be reduced; the detection period of the search space set corresponding to a smaller number of antennas is smaller, so that the power consumption of the terminal device can be reduced; The aggregation level of the search space set is larger, which can help to improve the detection performance of PDCCH; the aggregation level of the search space set corresponding to a larger number of antennas is smaller, which is conducive to saving system resources; for another example, the antenna The resource mapping method of the search space set with a small number is the non-interleaving mapping method, so that the access device can effectively use the scheduling gain; the resource mapping method of the search space set with a large number of antennas is the interleaving mapping method, so that the The PDCCH with a lower aggregation level obtains diversity gain; thus, it can help to improve the detection performance of the PDCCH, adapt to the dynamic change of the quantity traffic, reduce the communication delay, improve the reliability of the communication, and improve the user experience.

The first search space set may be one or multiple, which is not particularly limited in this application.

Optionally, the terminal device determining the first search space set according to the number of currently used receiving antennas includes: the terminal device determining the first search space set from at least two search space sets according to the currently used number of receiving antennas. A set of search spaces.

Optionally, each search space set in the at least two search space sets is associated with a terminal equipment receiving antenna quantity set, wherein the terminal equipment receiving antenna quantity set includes at least one terminal equipment receiving antenna quantity, and The first search space set is a search space in which the associated set of the number of receiving antennas of the terminal device includes the number of receiving antennas currently used by the terminal device.

Optionally, at least one different parameter exists between any two search space sets in the at least two search space sets, and the parameters include: a detection period of the search space set, an aggregation level of candidate downlink control channels, or The index of the control resource set CORESET associated with the search space set.

Optionally, the method further includes: receiving, by the terminal device, first configuration information, where the first configuration information is used to indicate a terminal device receiving antenna associated with each search space set in the at least two search space sets Quantity collection.

Optionally, the terminal device determining the first search space set according to the number of currently used receiving antennas includes: the terminal device determining, according to the currently used number of receiving antennas, parameters of the first search space set, where the parameters include At least one parameter among the detection period of the search space set, the aggregation level of the candidate downlink control channels, and the index of the CORESET associated with the search space set.

Optionally, the parameters of the first search space set include at least two parameter groups, each parameter group is associated with a terminal equipment receiving antenna quantity set, wherein the terminal equipment receiving antenna quantity set includes at least one terminal equipment The number of receiving antennas, each parameter group includes the detection period of the search space set, the aggregation level of the candidate downlink control channel, and the parameter value of at least one parameter in the index of the CORESET associated with the search space set, and the parameter value of the first search space. The parameter is a parameter in a parameter group in which the associated set of the number of receiving antennas of the terminal device includes the number of receiving antennas currently used by the terminal device.

Optionally, the method further includes: receiving, by the terminal device, second configuration information, where the second configuration information is used to indicate the number of receive antennas associated with each parameter group in the at least two parameter groups.

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

Optionally, if the number of first receiving antennas corresponding to the first search space set is smaller than the number of second receiving antennas corresponding to the second search space set, the detection period of the first search space set is greater than the detection period of the second search space set. cycle.

Optionally, if the number of first receiving antennas corresponding to the first search space set is less than the number of second receiving antennas corresponding to the second search space set, the aggregation level of the first search space set is smaller than the aggregation level of the second search space set. grade.

Optionally, if the number of first receiving antennas corresponding to the first search space set is less than the number of second receiving antennas corresponding to the second search space set, the resource mapping mode of the first search space set is non-interleaving mapping, and the second The resource mapping method of the search space set is interleaved mapping.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to a preset first threshold, the detection period of the first search space set is greater than or equal to a preset second threshold, and when the When the number of the first receiving antennas is greater than or equal to a preset third threshold, the detection period of the first search space set is less than or equal to a preset fourth threshold, wherein the first threshold is less than the third threshold , the fourth threshold is smaller than the second threshold.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to the preset fifth threshold, the aggregation level of the first search space set is greater than or equal to the preset sixth threshold, and when the When the number of the first receiving antennas is greater than or equal to a preset seventh threshold, the aggregation level of the first search space set is less than or equal to a preset eighth threshold, wherein the fifth threshold is less than the seventh threshold , the eighth threshold is smaller than the sixth threshold.

Optionally, the fifth threshold includes 2, the sixth threshold includes 4, the seventh threshold includes 4, and the eighth threshold includes 2.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to a preset ninth threshold, the resource mapping mode of the first search space set is non-interleaving mapping. When the number of antennas is greater than or equal to a preset tenth threshold, the resource mapping manner of the first search space set is interleaving mapping, where the ninth threshold is smaller than the tenth threshold.

Optionally, the ninth threshold includes 2, and the tenth threshold includes 4.

In a second aspect, an access device determines a first search space set according to the number of receive antennas currently used by a terminal device; the access device sends a downlink control channel according to the first search space set.

According to the solution provided in this application, the terminal device can select a search space set for PDCCH detection according to the number of antennas currently in use, and can flexibly cope with different data traffic. For example, the search space set corresponding to a larger number of antennas has a smaller detection period, Therefore, the reliability of data transmission can be ensured and the transmission delay can be reduced; the detection period of the search space set corresponding to a smaller number of antennas is smaller, so that the power consumption of the terminal device can be reduced; The aggregation level of the search space set is larger, which can help to improve the detection performance of PDCCH; the aggregation level of the search space set corresponding to a larger number of antennas is smaller, which is conducive to saving system resources; for another example, the antenna The resource mapping method of the search space set with a small number is the non-interleaving mapping method, so that the access device can effectively use the scheduling gain; the resource mapping method of the search space set with a large number of antennas is the interleaving mapping method, so that the The PDCCH with a lower aggregation level obtains diversity gain; thus, it can help to improve the detection performance of the PDCCH, adapt to the dynamic change of the quantity traffic, reduce the communication delay, improve the reliability of the communication, and improve the user experience.

Wherein, the first search space set may be one or multiple, which is not particularly limited in this application.

Optionally, the access device determining the first search space set according to the number of receive antennas currently used by the terminal device includes: the access device selects from at least two search space sets according to the currently used number of receive antennas, A first set of search spaces is determined.

Optionally, each search space set in the at least two search space sets is associated with a terminal equipment receiving antenna quantity set, wherein the terminal equipment receiving antenna quantity set includes at least one terminal equipment receiving antenna quantity, and The first search space set is a search space in which the associated set of the number of receiving antennas of the terminal device includes the number of receiving antennas currently used by the terminal device.

Optionally, at least one different parameter exists between any two search space sets in the at least two search space sets, and the parameters include: a detection period of the search space set, an aggregation level of candidate downlink control channels, or The index of the control resource set CORESET associated with the search space set.

Optionally, the method further includes: sending, by the access device, first configuration information, where the first configuration information is used to indicate the number of receive antennas associated with each search space set in the at least two search space sets .

Optionally, the access device determining the first search space set according to the number of receive antennas currently used by the terminal device includes: the access device determining the parameters of the first search space set according to the number of receive antennas currently used by the terminal device , the parameters include at least one parameter among the detection period of the search space set, the aggregation level of the candidate downlink control channels, and the index of the CORESET associated with the search space set.

Optionally, the parameters of the first search space set include at least two parameter groups, each parameter group is associated with a terminal equipment receiving antenna quantity set, wherein the terminal equipment receiving antenna quantity set includes at least one terminal equipment The number of receiving antennas, each parameter group includes the detection period of the search space set, the aggregation level of the candidate downlink control channel, and the parameter value of at least one parameter in the index of the CORESET associated with the search space set, and the parameter value of the first search space. The parameter is a parameter in a parameter group in which the associated set of the number of receiving antennas of the terminal device includes the number of receiving antennas currently used by the terminal device.

Optionally, the method further includes: sending, by the access device, second configuration information, where the second configuration information is used to indicate the number of receive antennas associated with each parameter group in the at least two parameter groups.

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

Optionally, if the number of first receiving antennas corresponding to the first search space set is smaller than the number of second receiving antennas corresponding to the second search space set, the detection period of the first search space set is greater than the detection period of the second search space set. cycle.

Optionally, if the number of first receiving antennas corresponding to the first search space set is less than the number of second receiving antennas corresponding to the second search space set, the aggregation level of the first search space set is smaller than the aggregation level of the second search space set. grade.

Optionally, if the number of first receiving antennas corresponding to the first search space set is less than the number of second receiving antennas corresponding to the second search space set, the resource mapping mode of the first search space set is non-interleaving mapping, and the second The resource mapping method of the search space set is interleaved mapping.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to a preset first threshold, the detection period of the first search space set is greater than or equal to a preset second threshold, and when the When the number of the first receiving antennas is greater than or equal to a preset third threshold, the detection period of the first search space set is less than or equal to a preset fourth threshold, wherein the first threshold is less than the third threshold , the fourth threshold is smaller than the second threshold.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to the preset fifth threshold, the aggregation level of the first search space set is greater than or equal to the preset sixth threshold, and when the When the number of the first receiving antennas is greater than or equal to a preset seventh threshold, the aggregation level of the first search space set is less than or equal to a preset eighth threshold, wherein the fifth threshold is less than the seventh threshold , the eighth threshold is smaller than the sixth threshold.

Optionally, the fifth threshold includes 2, the sixth threshold includes 4, the seventh threshold includes 4, and the eighth threshold includes 2.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to a preset ninth threshold, the resource mapping mode of the first search space set is non-interleaving mapping. When the number of antennas is greater than or equal to a preset tenth threshold, the resource mapping manner of the first search space set is interleaving mapping, where the ninth threshold is smaller than the tenth threshold.

Optionally, the ninth threshold includes 2, and the tenth threshold includes 4.

In a third aspect, a wireless communication method is provided, including: a terminal device determining a first search space set according to a currently running DRX timer; and the terminal device, according to the first search space set, Detect downlink control channels.

According to the solution provided in this application, the terminal device can select a search space set for PDCCH detection according to the currently running DRX timer, and can flexibly cope with different data traffic. For example, the detection period of the search space set corresponding to drx-InactivityTimer is small, Therefore, the reliability of data transmission can be ensured, the transmission delay can be reduced, and the detection period of the search space set corresponding to drx-onDurationTimer can be small, so that the power consumption of the terminal device can be reduced; thus, the detection performance of the PDCCH can be improved. It can adapt to the dynamic change of quantity traffic, reduce communication delay, improve communication reliability, and improve user experience.

Optionally, the terminal device determining the first search space set according to the currently running DRX timer includes: the terminal device determining the first search space set from at least two search spaces according to the currently running DRX timer. , at least one different parameter exists between any two search space sets in the at least two search space sets, and the parameter includes a detection period of the search space sets.

Optionally, the method further includes: receiving, by the terminal device, first configuration information, where the first configuration information is used to indicate a mapping relationship between at least two DRX timers and at least two search space sets; the The terminal device determines, as the first search space set, the search space set indicated by the first configuration information and corresponding to the timer of the currently running DRX.

Optionally, the terminal device determining the first search space set according to the currently running DRX timer includes: the terminal device determining, according to the currently running DRX timer, parameters of the first search space set, where the parameters include detection At least one parameter of period, aggregation level or resource mapping mode.

Optionally, the method further includes: receiving, by the terminal device, second configuration information, where the second configuration information is used to indicate a DRX timer corresponding to each parameter group in the multiple parameter groups, wherein each parameter The group includes a value of the detection period of a search space set; the terminal device determines the parameter in the parameter group corresponding to the timer of the currently running DRX indicated by the second configuration information as the parameter of the first search space set .

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

Optionally, the detection period of the first search space set is greater than the detection period of the second search space set. The DRX timer corresponding to the first search space set is drx-onDurationTimer, and the DRX timer corresponding to the second search space set is drx-InactivityTimer.

Optionally, when the drx-onDurationTimer corresponding to the first search space set, the detection period of the first search space set is greater than or equal to a preset first threshold.

Optionally, when the first search space set corresponds to drx-InactivityTimer, the detection period of the first search space set is less than or equal to a preset second threshold.

The first threshold includes 10 slots, and the second threshold includes 5 slots.

A fourth aspect provides an access device determining a first search space set according to a DRX timer currently running by a terminal device; the access device sends a downlink control channel according to the first search space set .

According to the solution provided in this application, the terminal device can select a search space set for PDCCH detection according to the number of antennas currently in use, and can flexibly cope with different data traffic. For example, the search space set corresponding to a larger number of antennas has a smaller detection period, Therefore, the reliability of data transmission can be ensured and the transmission delay can be reduced; the detection period of the search space set corresponding to a smaller number of antennas is smaller, so that the power consumption of the terminal device can be reduced; The aggregation level of the search space set is larger, which can help to improve the detection performance of PDCCH; the aggregation level of the search space set corresponding to a larger number of antennas is smaller, which is conducive to saving system resources; for another example, the antenna The resource mapping method of the search space set with a small number is the non-interleaving mapping method, so that the access device can effectively use the scheduling gain; the resource mapping method of the search space set with a large number of antennas is the interleaving mapping method, so that the The PDCCH with a lower aggregation level obtains diversity gain; thus, it can help to improve the detection performance of the PDCCH, adapt to the dynamic change of the quantity traffic, reduce the communication delay, improve the reliability of the communication, and improve the user experience.

Optionally, the access device determining the first search space set according to the timer of the DRX currently running by the terminal device includes: the access device determining the distance between the timers of at least two kinds of DRX and the at least two search space sets. There is at least one different parameter between any two search space sets in the at least two search space sets, and the parameter includes the detection period of the search space set; the access device will communicate with the The search space set corresponding to the timer of the DRX currently running by the terminal device is determined as the first search space set.

Optionally, the method further includes: the access device sends first configuration information to the terminal device, where the first configuration information is used to indicate the timers of the at least two kinds of DRX and the at least two search spaces Mapping relationships between sets.

Optionally, the access device determining the first search space set according to the DRX timer currently running by the terminal device includes: the access device determining the DRX timer corresponding to each parameter group in the multiple parameter groups, wherein, Each parameter group includes a value of the detection period of the search space set; the access device determines the parameters in the parameter group corresponding to the timer of the DRX currently running by the terminal device as the value of the first search space set parameter.

Optionally, the method further includes: the access device sends second configuration information to the terminal device, where the second configuration information is used to indicate the DRX configuration information corresponding to each parameter group in the multiple parameter groups. timer.

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

Optionally, the detection period of the first search space set is greater than the detection period of the second search space set. The DRX timer corresponding to the first search space set is drx-onDurationTimer, and the DRX timer corresponding to the second search space set is drx-InactivityTimer.

Optionally, when the drx-onDurationTimer corresponding to the first search space set, the detection period of the first search space set is greater than or equal to a preset first threshold.

Optionally, when the first search space set corresponds to drx-InactivityTimer, the detection period of the first search space set is less than or equal to a preset second threshold.

The first threshold includes 10 slots, and the second threshold includes 5 slots.

In a fifth aspect, a wireless communication device is provided, comprising: a processing unit and a storage unit.

Wherein, each unit in the apparatus is respectively configured to execute each step of the above-mentioned first aspect and the communication method in each implementation manner of the first aspect.

In one design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter for transmitting information or data, and a receiver for receiving information or data.

In a sixth aspect, an apparatus for wireless communication is provided, comprising: a processing unit and a storage unit.

Wherein, each unit in the apparatus is respectively configured to execute each step of the communication method in the above-mentioned second aspect and each implementation manner of the second aspect.

In one design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter for transmitting information or data, and a receiver for receiving information or data.

In a seventh aspect, a wireless communication device is provided, including: a processor, a memory, a control circuit, an antenna, and an input and output device.

Wherein, each unit in the apparatus is respectively configured to execute each step of the communication method in the third aspect and each implementation manner of the third aspect.

In one design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter for transmitting information or data, and a receiver for receiving information or data.

In an eighth aspect, a wireless communication device is provided, including: a processor, a memory, a control circuit, an antenna, and an input and output device.

Wherein, each unit in the device is respectively configured to execute each step of the communication method in the above fourth aspect and each implementation manner of the fourth aspect.

In one design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter for transmitting information or data, and a receiver for receiving information or data.

In a ninth aspect, a wireless communication device is provided, comprising: a radio frequency unit and a baseband unit.

Wherein, each unit in the apparatus is respectively configured to execute each step of the communication method in each implementation manner of any one of the first aspect to the fourth aspect.

In one design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter for transmitting information or data, and a receiver for receiving information or data.

In a tenth aspect, a communication device is provided, comprising: a processor and a memory, where the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the communication device executes the first aspect to the first A communication method in any of the four aspects and various possible implementations thereof.

Optionally, there are one or more processors and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

Optionally, the forwarding device further includes a transmitter (transmitter) and a receiver (receiver).

In an eleventh aspect, a communication system is provided, including the communication device provided in the ninth aspect.

In a possible design, the communication system may further include other devices that interact with the communication device in the solutions provided in the embodiments of the present application.

A twelfth aspect provides a computer program product, the computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes a computer to execute the above-mentioned first aspect to The method in any possible implementation manner of the fourth aspect.

In a thirteenth aspect, a computer-readable medium is provided, the computer-readable medium stores a computer program (also referred to as code, or instruction) when it is run on a computer, causing the computer to execute the above-mentioned first aspect to The method in any possible implementation manner of the fourth aspect.

In a fourteenth aspect, a chip system is provided, including a memory and a processor, where the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that a communication device installed with the chip system executes the The method in any possible implementation manner of the first aspect to the fourth aspect.

Wherein, the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system of the present application.

FIG. 2 is a schematic diagram of an example of a resource division method.

FIG. 3 is a schematic diagram of an example of the structure of the REG.

FIG. 4 is a schematic diagram of an example of possible positions of candidate PDCCHs under different aggregation levels.

FIG. 5 is a schematic diagram of an example of the correspondence relationship between PDCCH and CCE.

FIG. 6 is a schematic diagram of an example of the positions of candidate PDCCHs.

FIG. 7 is a schematic diagram of an example of a DRX cycle.

FIG. 8 is a schematic diagram of another example of the DRX cycle.

FIG. 9 is a schematic flowchart of an example of the PDCCH detection process of the present application.

FIG. 10 is a schematic diagram showing an example of the relationship between the number of antennas and the detection period.

FIG. 11 is a schematic flowchart of another example of the PDCCH detection process of the present application.

FIG. 12 is a schematic flowchart of another example of the PDCCH detection process of the present application.

FIG. 13 is a schematic diagram showing an example of the relationship between the timer and the detection period.

FIG. 14 is a schematic flowchart of another example of the PDCCH detection process of the present application.

FIG. 15 is a schematic block diagram of an example of an apparatus for wireless communication of the present application.

FIG. 16 is a schematic block diagram of another example of the apparatus for wireless communication of the present application.

FIG. 17 is a schematic configuration diagram of an example of a terminal device of the present application.

FIG. 18 is a schematic structural diagram of an example of an access device of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a global system for mobile communications (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (wideband) system code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (long termevolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5th generation, 5G) system or new Wireless (new radio, NR) and so on.

As an example and not a limitation, in the embodiments of the present application, the terminal equipment in the embodiments of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device , user terminal, terminal, wireless communication device, user agent or user equipment. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication function Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or in future evolved public land mobile networks (PLMN) etc., this is not limited in the embodiments of the present application.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an internet of things (Internet of things, IoT) system. IoT is an important part of the future development of information technology, and its main technical feature is that items are passed through communication technology. Connect with the network, so as to realize the intelligent network of human-machine interconnection and interconnection of things.

In the embodiments of the present application, the IOT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, a narrow band (narrow band) NB technology. For example, the NB only includes one resource block (RB), that is, the bandwidth of the NB is only 180KB. To achieve massive access, the terminals must be discrete in access. According to the communication method of the embodiment of the present application, the congestion problem of the massive terminals of the IOT technology when accessing the network through the NB can be effectively solved.

In addition, in this application, terminal equipment may also include sensors such as smart printers, train detectors, gas stations, etc. The main functions include collecting data (part of terminal equipment), receiving control information and downlink data of network equipment, and sending electromagnetic waves to Network equipment transmits uplink data.

The network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in the cloud radio access network (cloud radio access network, CRAN) scenario, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, and future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., may be an access point (access point, AP) in a WLAN, or a gNB in a new radio system (new radio, NR) system This application The embodiment is not limited.

In addition, in this embodiment of the present application, an access network device provides services for a cell, and a terminal device communicates with the access network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell It can be a cell corresponding to an access network device (such as a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: a metro cell, a micro cell ( micro cell), pico cell (pico cell), femto cell (femto cell), etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

In addition, a carrier in an LTE system or a 5G system can have multiple cells working on the same frequency at the same time. In some special scenarios, the concepts of the above-mentioned carrier and cell can also be considered equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identification (Cell ID) of the secondary cell operating on the secondary carrier are carried at the same time. In this case, it can be considered that the concepts of the carrier and the cell are equivalent, for example, the UE accessing a carrier is equivalent to accessing a cell.

The core network device may be connected to a plurality of access network devices for controlling the access network devices, and may distribute data received from the network side (eg, the Internet) to the access network devices.

In addition, in this application, network equipment may include base stations (gNBs), such as macro base stations, micro base stations, indoor hotspots, and relay nodes, etc., whose function is to send radio waves to terminal equipment, on the one hand to realize downlink data transmission, on the other hand Aspects send scheduling information to control uplink transmission, receive radio waves sent by terminal equipment, and receive uplink data transmission.

The functions and specific implementation manners of the terminal equipment, the access network equipment, and the core network equipment listed above are only exemplary descriptions, and the present application is not limited thereto.

In this embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the present application do not specifically limit the specific structure of the execution body of the methods provided by the embodiments of the present application, as long as the program that records the codes of the methods provided by the embodiments of the present application can be executed to provide the methods provided by the embodiments of the present application. For example, the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute a program.

Additionally, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer readable device, carrier or medium. For example, computer readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) etc.), smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), cards, stick or key drives, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

It should be noted that, in this embodiment of the present application, multiple application programs may be run at the application layer. In this case, the application program that executes the communication method of the embodiment of the present application is used to control the receiving end device to complete the received data. The applications of the corresponding actions may be different applications.

FIG. 1 is a schematic diagram of a system 100 to which the communication method according to the embodiment of the present application can be applied. As shown in FIG. 1 , the system 100 includes an access network device 102 , which may include one antenna or multiple antennas, eg, antennas 104 , 106 , 108 , 110 , 112 and 114 . In addition, the access network equipment 102 may additionally include a transmitter chain and a receiver chain, each of which may include various components (eg, processors, modulators, user, demodulator, demultiplexer or antenna, etc.).

Access network device 102 may communicate with a plurality of end devices (eg, end device 116 and end device 122). However, it will be appreciated that the access network device 102 may communicate with any number of terminal devices similar to the terminal device 116 or the terminal device 122 . Terminal devices 116 and 122 may be, for example, cellular telephones, smart phones, laptop computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100 . equipment.

As shown in FIG. 1, terminal device 116 communicates with antennas 112 and 114, wherein antennas 112 and 114 transmit information to terminal device 116 via a forward link (also referred to as a downlink) 118, and via a reverse link (also referred to as a downlink) 118 Referred to as the uplink) 120 receives information from the terminal device 116 . In addition, terminal device 122 communicates with antennas 104 and 106 , which transmit information to terminal device 122 via forward link 124 and receive information from terminal device 122 via reverse link 126 .

For example, in a frequency division duplex (FDD) system, forward link 118 may use a different frequency band than reverse link 120, and forward link 124 may use a different frequency band than reverse link 126, for example frequency band.

As another example, in time division duplex (TDD) systems and full duplex systems, forward link 118 and reverse link 120 may use a common frequency band, forward link 124 and reverse Links 126 may use a common frequency band.

Each antenna (or group of antennas) and/or area designed for communication is referred to as a sector of the access network device 102 . For example, an antenna group may be designed to communicate with terminal devices in sectors of the access network device 102 coverage area. The access network device can transmit signals to all terminal devices in its corresponding sector through a single antenna or multiple antenna transmit diversity. The transmit antenna of access network device 102 may also utilize beamforming to improve forward links 118 and 124 during communication of access network device 102 with terminal devices 116 and 122 via forward links 118 and 124, respectively. Signal-to-noise ratio. Furthermore, beamforming is utilized at the access network device 102 to randomly disperse the terminal devices 116 and 122 in the relevant coverage area, as compared to the way that the access network device transmits signals to all its terminal devices through a single antenna or multiple antenna transmit diversity. When transmitting, mobile devices in neighboring cells experience less interference.

At a given time, the access network device 102, the terminal device 116 or the terminal device 122 may be a wireless communication transmitter and/or a wireless communication receiver. When transmitting data, the wireless communication transmitting device may encode the data for transmission. Specifically, the wireless communication transmitting device may acquire (eg, generate, receive from other communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a PLMN network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, an IoT network, or other networks. FIG. 1 is a simplified schematic diagram of an example. , the network may also include other access network devices, which are not shown in FIG. 1 .

In this embodiment of the present application, data or information may be carried through time-frequency resources, where the time-frequency resources may include resources in the time domain and resources in the frequency domain.

In this application, the basic unit in the frequency domain may be one subcarrier, and in this application, the subcarrier spacing (Subcarrier Spacing, SCS) may be 15KHz, 30KHz, or the like.

In this application, and the unit of the frequency domain resource used for uplink transmission or downlink transmission may be a physical resource block (Physical Resource Block, PRB), and each PRB is composed of 12 consecutive subcarriers in the frequency domain.

FIG. 2 shows an example of a division manner of time-frequency resources of the present application. As shown in FIG. 2 , each element on the resource grid is called a resource element (Resource Element, RE). The RE is the smallest physical resource, and includes one subcarrier in one orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) OFDM symbol.

In this application, the basic time unit of resource scheduling (eg, downlink resource scheduling) may be a time slot (slot), for example, a slot consists of 14 OFDM symbols in time.

The access device may transmit a physical downlink shared channel (PDSCH) and a physical downlink control channel (PDCCH) to the terminal device.

In order to correctly receive the PDSCH, the terminal device needs to demodulate the downlink control channel first, and the downlink control information (DCI) carried by the PDCCH includes relevant information required for receiving the PDSCH, such as the location and size of the time-frequency resources of the PDSCH, and multi-antenna configuration information.

The PDCCH is transmitted in a control-resource set (CORESET), and the CORESET includes multiple PRBs in the frequency domain and one or more (for example, 2 or 3) OFDM symbols in the time domain, wherein , the OFDM symbol corresponding to the PDCCH may be located at any position in the slot.

In this application, a control channel element (Control-channel element, CCE) is a basic unit constituting a PDCCH, and each CCE in the CORESET will have a corresponding index number.

In this application, one PDCCH may be composed of one or more (for example, 2, 4, 8 or 16) CCEs, for example, the number of CCEs included in one PDCCH may be determined by the DCI payload size of the PDCCH and the /Or the coding rate required for the PDCCH is determined, and the number of CCEs constituting the PDCCH is also called an aggregation level (aggregation level, AL).

The access device can adjust the aggregation level of the PDCCH according to the actual transmission wireless channel state to realize link adaptive transmission.

Moreover, one CCE corresponds to 6 resource-element groups (REGs) on the physical resource. As shown in FIG. 3 , one REG occupies one OFDM symbol in the time domain and one resource block in the frequency domain (ie, includes 12 consecutive subcarriers in the frequency domain).

The mapping relationship between the CCE and the REG may include interleaved mapping (Interleaved mapping) and non-interleaved mapping (Non-interleaved mapping), and the mapping relationship used in the actual transmission process may be configured through high-level signaling. Through interleaving and mapping, the REGs mapped by the CCE can be dispersed in the entire CORESET, thereby obtaining frequency diversity gain. Through the non-interleaved mapping, the REGs mapped by the CCE can be aggregated into some time-frequency resources in the CORESET.

A search space (search space) is a set of candidate (candidate) PDCCHs under a certain aggregation level (AL). Since the aggregation level of the PDCCH actually sent by the access device is variable over time, and since there is no relevant signaling to inform the UE of the aggregation level, the UE needs to blindly detect the PDCCH under different aggregation levels, where the PDCCH to be blindly detected is called the candidate PDCCH , a certain aggregation level may have multiple candidate PDCCHs. The UE will decode all candidate PDCCHs composed of CCEs in the search space, for example, cyclic redundancy check (Cyclic Redundancy Check, CRC) decoding, if the CRC check is passed, the terminal device can consider the decoded PDCCH The content of the PDCCH is valid for the terminal equipment, and the related information after decoding is processed. For example, FIG. 4 shows an example of possible positions of candidate PDCCHs under different aggregation levels.

In order to reduce the blind detection complexity of the downlink control channel, the access device may configure one or more search space sets (search space sets) for the terminal device, wherein each search space set includes search spaces of one or more aggregation levels.

The search space set can be divided into two types: a common search space set (common search space set) and a user-specific search space set (UE-specific search space set). Among them, the PDCCH in the common search space set is mainly used to indicate the reception of system messages, random access responses, and paging messages. The PDCCH in the user-specific search space set is used to schedule uplink data or downlink data for terminal equipment.

The access device may send configuration information of the search space set to the terminal device, where the configuration information may include the index number of each search space set configured by the access device for the terminal device and the index number of the CORESET associated with each search space set. For example, assuming that a CORESET includes 24 CCEs, the corresponding aggregation level in the search space set is AL=2, and the number of candidate PDCCHs is 6, FIG. 5 shows an example of CCEs corresponding to the candidate PDCCHs.

In the time domain, the terminal device detects candidate PDCCHs in the search space set at certain time intervals, so the configuration information may also include information about at least one of the following parameters:

Parameter 1. Detection cycle

That is, the time interval for the terminal device to detect the search space set, and the unit of the detection period may be a slot.

Parameter 2, time slot offset

That is, the time offset from the start time of the detection period to the time when the terminal device detects the search space set for the first time, wherein the value of the time slot offset is smaller than the value of the detection period.

Parameter 3, the number of time slots

That is, the terminal device continuously detects the number of time slots in the search space set in one detection, wherein the value of the number of time slots is smaller than the value of the detection period.

Parameter 4, symbol position

That is, within each slot, the position of the CORESET start symbol associated with the search space set.

For example, suppose the detection period is 10 slots, the time slot offset is 3 slots, the number of time slots is 2 slots, the CORESET associated with the search space set is a CORESET occupying 2 OFDM symbols, and the symbol position is the OFDM in the slot Symbol 0 and OFDM symbol 7, then Figure 6 shows the positions of the candidate PDCCHs, that is, as shown in Figure 6, the terminal equipment can have indices 0 and 7 in the slots with indices 3 and 4 in each detection period The candidate PDCCHs of the search space set in the CORESET are detected on the symbol of , and the CORESET occupies 2 OFDM symbols in the time domain.

Optionally, in addition to the above information, the configuration information may also include, but is not limited to, information about one or more of the following parameters:

Parameter 5. Aggregation level size

That is, the aggregation level information included in each search space set configured by the access device for the terminal device, for example, the value range of the aggregation level may be: {1, 2, 4, 8, 16}.

Parameter 6. Number of candidate control channels

Specifically, it is the number of candidate PDCCHs in the search space of each aggregation level.

In this application, a terminal device may be in different states, one of which is a radio resource control connection (Radio Resource Control, RRC) connection state, referred to as RRC_CONNECTED state. In the RRC_CONNECTED state, the terminal device has established an RRC context, ie the parameters necessary for communication between the terminal device and the radio access network are known to both.

In general, packet-based data flow is usually bursty, that is, there may be data transmission for a period of time, but no data transmission for a longer period of time next. Therefore, in this application, the Discontinuous Reception (DRX) mechanism can be used, that is, when there is no data transmission, the power consumption can be reduced by making the terminal device stop detecting the PDCCH and stop receiving the corresponding data transmission, thereby improving the battery usage time.

As shown in Figure 7, in DRX, the access device can configure a DRX cycle (cycle) for the terminal device in the RRC_CONNECTED state, and the DRX cycle includes a time area called "On duration" or "Activation".

During the "on duration" time, the UE may detect the PDCCH. That is, the terminal device can start a timer at the time start position of each DRX cycle (that is, the time start position of "On duration"), and the time length of the timer is the time length of "on duration", and the timer It may be called a duration timer (drx-onDurationTimer). For example, the range of the drx-onDurationTimer may be 1-1200 milliseconds (ms).

Therefore, the terminal device can detect the PDCCH within the time range in which the drx-onDurationTimer runs.

If the terminal device does not detect the PDCCH within the running time range of drx-onDurationTimer, then after the drx-onDurationTimer expires, the terminal device can enter the sleep state, that is, the terminal device can turn off the receiving circuit during the rest of the DRX cycle, thereby Reduce the power consumption of the terminal.

As shown in FIG. 8 , if the terminal device detects the PDCCH within the running time range of drx-onDurationTimer, the terminal device can start the inactivity timer (drx-InactivityTimer) in the DRX mechanism. If the terminal device continues to detect the PDCCH within the running time of the drx-InactivityTimer, the terminal device can reset (restart) the drx-InactivityTimer and restart the timing. And, if the drx-InactivityTimer is in the running state, even if the drx-onDurationTimer expires (or times out), that is, the "on duration" time expires, the terminal device continues to detect the PDCCH until the drx-InactivityTimer times out.

FIG. 9 shows a schematic diagram of an example of a downlink control channel detection method 200 of the present application. As shown in FIG. 9 , the access device #A may configure multiple search space sets for the terminal device #A.

By way of example and not limitation, the set of search spaces may be a set of user-specific search spaces of terminal device #A.

In this application, at least one different search space set parameter exists between any two search space sets in the multiple search space sets.

And, in this application, the search space set parameters may include but not limited to at least one of the following parameters:

A. The detection period of the search space set

That is, the time interval for the terminal device to detect the search space set, and the unit of the detection period may be a slot.

B. Aggregation level of candidate downlink control channels

That is, the value of the aggregation level of the search space of the search space set, or the value of the number of CCEs included in the PDCCH in the search space set.

For example, the value range of an aggregation level may be {1, 2, 4, 8}.

For another example, the value range of another aggregation level may be {1, 2}.

For another example, the value range of another aggregation level may be {4, 8}.

C. The index of the CORESET associated with the search space collection

Wherein, through the index of the CORESET associated with the search space set, the terminal device can know the mapping mode between CCEs and REGs of the candidate control channels of the search space set, for example, it can include interleaved mapping and non-interleaved mapping.

In this application, different search space sets may correspond to different sets of terminal device receiving antenna numbers, wherein each terminal device receiving antenna data set includes at least one terminal device receiving antenna number (specifically, the number of terminal device receiving antennas) value), or in other words, the at least two search space sets have a one-to-one correspondence with at least two sets of the number of receiving antennas of the terminal device.

For example, suppose that the search space set #A corresponds to the terminal equipment receiving antenna data set #A, then at least one parameter of the search space set #A is determined according to the terminal equipment receiving antenna data set #A, as an example and not a limitation, At least one of the following determination methods can be listed.

way 1

When the value (eg, the maximum value) of the number of antennas in the terminal device receiving antenna data set #A is less than or equal to the preset threshold #A, the detection period of the search space set #A may be configured to be greater than or equal to the preset threshold #A Threshold #B.

When the value (eg, the minimum value) of the number of antennas in the terminal device receiving antenna data set #A is greater than or equal to the preset threshold #C, the detection period of the search space set #A may be configured to be less than or equal to the preset threshold #C Threshold #D.

Wherein, the threshold #A may be less than or equal to the threshold #C.

The threshold #B may be greater than or equal to the threshold #D.

For example, the value of the threshold #A may be 2, and the value of the threshold #C may be 4.

For another example, the threshold #B may be 10 slots or 16 slots, and the threshold #D may be 2 slots, 4 slots or 5 slots.

When the number of antennas used by the terminal equipment is small (for example, 2), it means that the data amount of the downlink data is small. In this case, by setting the detection period of the search space set #A to a larger value, it can reduce the The power consumption of the end device.

Correspondingly, when the number of antennas used by the terminal equipment is large (for example, 4), it means that the data amount of the downlink data is large. In this case, the detection period of the search space set #A is set to a smaller value. , which can reduce the delay of data transmission and improve the reliability of communication.

way 2

When the value (eg, the maximum value) of the number of antennas in the terminal device receiving antenna data set #A is less than or equal to the preset threshold #E, the aggregation level of the search space set #A may be configured to be greater than or equal to the preset threshold #E Threshold #F.

When the value (eg, the minimum value) of the number of antennas in the terminal device receiving antenna data set #A is greater than or equal to the preset threshold #G, the aggregation level of the search space set #A may be configured to be less than or equal to the preset threshold #G Threshold #H.

The threshold #E may be less than or equal to the threshold #G.

The threshold #F may be greater than or equal to the threshold #H.

For example, the value of the threshold #E may be 2, and the value of the threshold #G may be 4.

In this case, the value of the threshold #F may be 4, and the value of the threshold #H may be 2

When the number of antennas used by the terminal equipment is small (for example, 2), the performance of the terminal equipment to detect the PDCCH may be affected. In this case, increasing the aggregation level is beneficial to improve the detection performance of the PDCCH.

When the number of antennas used by the terminal device is large (for example, 4), the performance of the terminal device in detecting the PDCCH is enhanced. In this case, reducing the aggregation level is beneficial to saving system resources.

way 3

When the value (for example, the maximum value) of the number of antennas in the receiving antenna data set #A by the terminal device is less than or equal to the preset threshold #1, the index of the CORESET associated with the search space set #A may be determined as the index #A, The CCE mapping mode of the CORESET of index #A is non-interleaving mapping, so the resource mapping mode of the CCEs of the candidate control channels of the search space set is non-interleaving mapping.

When the value (for example, the minimum value) of the number of antennas in the receiving antenna data set #A by the terminal device is greater than or equal to the preset threshold #J, the index of the CORESET associated with the search space set #A may be determined as the index #B, Wherein, the CCE mapping manner of the CORESET of index #B is interleaving mapping, so the resource mapping manner of the CCEs of the candidate control channels of the search space set is interleaving mapping.

Wherein, the threshold #I may be less than or equal to the threshold #J.

For example, the value of the threshold #I may be 2, and the value of the threshold #J may be 4.

When the number of antennas used by the terminal device is small (for example, 2), by using the non-interleaving mapping method, the access device can effectively utilize the scheduling gain.

When the number of antennas used by the terminal device is large (for example, 4), the PDCCH with a lower aggregation level (for example, 2) can obtain diversity gain through interleaving and mapping.

For another example, suppose search space set #1 corresponds to terminal device receiving antenna data set #1, and search space set #2 corresponds to terminal device receiving antenna data set #2, then if terminal device receiving antenna data set #1 is smaller than the terminal device receiving antenna data set #1 If the antenna data set #2 is received, at least one of the following relationships may be satisfied between the search space set #1 and the search space set #2.

Relationship 1

As shown in FIG. 10 , the detection period of search space set #1 is greater than the detection period of search space set #2.

In other words, the detection time interval of search space set #1 is greater than the detection time interval of search space set #2.

When the number of antennas used by the terminal equipment is large (for example, 4), it indicates that the data volume of the downlink data is large. Correspondingly, when the number of antennas used by the terminal equipment is small (for example, 2), it indicates that when the downlink data is large The data amount of the data is small, that is, when the value (eg, the maximum value) of the number of antennas in the terminal device receiving antenna data set #1 is smaller than the value (eg, the minimum value) of the number of antennas in the terminal device receiving antenna data set #2 ), it indicates that the data amount of downlink transmission corresponding to search space set #1 is smaller than the data amount of downlink transmission corresponding to search space set #1.

It can be seen from this that when the search space set #1 is used, the quantity traffic of the terminal equipment is small. In this case, by setting the detection period of the search space set #1 to a larger value, the power consumption of the terminal equipment can be reduced.

In contrast, when the search space set #2 is used, the number of terminal devices is relatively large. In this case, by setting the detection period of the search space set #2 to a smaller value, the delay of data transmission can be reduced and the communication can be improved. reliability.

For example, when the value (eg, the maximum value) of the number of antennas in the terminal device receiving antenna data set #1 is 2, the detection period of the search space set #1 may be 10 slots or 16 slots.

For another example, when the value (eg, the minimum value) of the number of antennas in the terminal device receiving antenna data set #2 is 4, the detection period of the search space set #2 may be 2 slots, 4 slots or 5 slots.

Relationship 2

The value range of the aggregation level of the search space set #1 is smaller than the value range of the aggregation level of the search space set #2.

For example, when the value (eg, the maximum value) of the number of antennas in the terminal device receiving antenna data set #1 is 2, the value range of the aggregation level of the search space set #1 may be {4, 8}, or, in other words, The aggregation level of search space set #1 can be 4 or 8.

When the value (eg, the minimum value) of the number of antennas in the terminal device receiving antenna data set #2 is 4, the value range of the aggregation level of the search space set #2 may be {1, 2, 4, 8}, or Say, the aggregation level of search space set #2 takes one of 1, 2, 4, or 8.

When the number of antennas used by the terminal equipment is small (for example, 2), the performance of the terminal equipment to detect the PDCCH may be affected. In this case, increasing the aggregation level is beneficial to improve the detection performance of the PDCCH.

When the number of antennas used by the terminal device is large (for example, 4), the performance of the terminal device in detecting the PDCCH is enhanced. In this case, reducing the aggregation level is beneficial to saving system resources.

Relationship 3

The index of the CORESET associated with the search space set #1 indicates that the resource mapping mode is non-interleaving mapping, and the resource mapping mode indicated by the index of the CORESET associated with the search space set #2 is interleaved mapping.

When the number of antennas used by the terminal device is small (for example, 2), by using the non-interleaving mapping method, the access device can effectively utilize the scheduling gain.

When the number of antennas used by the terminal device is large (for example, 4), the PDCCH with a lower aggregation level (for example, 2) can obtain diversity gain through interleaving and mapping.

Table 1 below shows an example of the mapping relationship between the number of receiving antennas and the set of search spaces in the present application.

Table 1

Number of receiving antennas index of the search space collection Detection period (unit: slot) 2 index 1 10 or 16 4 Index 2 2, 4 or 5

Table 2 below shows another example of the mapping relationship between the number of receiving antennas and the set of search spaces in the present application.

Table 2

Table 3 below shows another example of the mapping relationship between the number of receiving antennas and the set of search spaces in the present application.

table 3

Number of receiving antennas index of the search space collection Index of CORESET resource mapping 2 index 1 index a non-interleaving mapping 4 Index 2 index b Interleaving Mapping

Table 4 below shows another example of the mapping relationship between the number of receiving antennas and the set of search spaces in the present application.

Table 4

Number of receiving antennas index of the search space collection Detection period (unit: slot) Aggregation level resource mapping 2 index 1 10 or 16 4 or 8 non-interleaving mapping 4 Index 2 2, 4 or 5 1, 2, 4 or 8 Interleaving Mapping

Table 5 below shows another example of the mapping relationship between the number of receiving antennas and the set of search spaces in the present application.

table 5

Number of receiving antennas index of the search space collection 2 index 1 4 Index 2

In the mapping relationship shown in Table 5, the detection period of the search space set of index 1 may be greater than the detection period of the search space set of index 2, for example, the detection period of the search space set of index 1 may be 10 slots or 16 slots , the detection period of the search space set of index 2 can be 2 slots, 4 slots or 5 slots.

Alternatively, the aggregation level of the search space collection of index 1 may be greater than the aggregation level of the search space collection of index 2. For example, the aggregation level of the search space collection of index 1 may be 4 or 8, and the aggregation level of the search space collection of index 2 may be 1, 2, 4 or 8.

Alternatively, the resource mapping manner of the search space set of index 1 may be non-interleaving mapping, and the resource mapping manner of the search space set of index 2 may be interleaving mapping.

At S210, access device #A may send configuration information #A to terminal device #A, where configuration information #A may be used to indicate a parameter of each search space set in the at least two search space sets, wherein the parameter may be Including but not limited to at least one of the above parameters 1 to 6.

In addition, the configuration information #A may also indicate the mapping relationship between the at least two search space sets and the at least two terminal equipment receiving antenna quantity sets, or in other words, the configuration information #A may also indicate the at least two search space sets The set quantity of the terminal equipment receiving antenna quantity corresponding to each search space set in the set.

At S220, when the access device #A sends the PDCCH to the terminal device #A at the time #A, the access device #A may determine the number of receive antennas used by the terminal device #A at the time #A (denoted, number #A ).

For example, access device #A may determine the number #A based on whether or not to transmit PDCCH to terminal device #A at time #B, where time #B is a time before time #A and the time #B There is a preset time interval #A between time #A, where the time interval #A may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if access device #A sends a PDCCH to terminal device #A at time #B, access device #A may determine that the value of quantity #A is X, where X may be the The number of receiving antennas used when the data flow is large. For example, the value of X may be 4, where the value of X may be specified by the communication system or communication protocol, or determined by the administrator according to data statistics.

If access device #A does not send a PDCCH to terminal device #A at time #B, access device #A may determine that quantity #A has a value of Y, where Y may be terminal device #A when the data flow is small The number of used receiving antennas, for example, the value of Y may be 2, where the value of Y may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

For another example, the access device #A may instruct the terminal device #A to report the quantity #A.

For another example, terminal device #A may periodically report the number of used receiving antennas, so that access device #A may determine the number of receiving antennas reported by terminal device #A for the last time before time #A as the number#. A.

Similarly, terminal device #A can determine the number of currently used receive antennas at time #A.

For example, terminal device #A may determine the number #A based on whether or not PDCCH is detected at time #B, where time #B is a time before time #A and the difference between time #B and time #A There is a preset time interval #A, where the time interval #A may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if terminal equipment #A detects the PDCCH at time #B, terminal equipment #A may determine that the value of quantity #A is X, where X may be used by terminal equipment #A when the data flow is large The number of receiving antennas, for example, the value of X may be 4, where the value of X may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

If terminal device #A does not detect a PDCCH at time #B, terminal device #A may determine that quantity #A has a value of Y, where Y may be the number of receive antennas used by terminal device #A when the data flow is small For example, the value of Y may be 2, where the value of Y may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

For another example, the terminal device #A may arbitrarily determine the number #A, and the terminal device #A may report the number #A according to the instruction of the access device #A.

For another example, terminal equipment #A may periodically report the number of used receiving antennas, so that terminal equipment #A may determine the number of receiving antennas reported by terminal equipment #A for the last time before time #A as quantity #A. .

It should be understood that the methods and processes for determining the quantity #A listed above are only exemplary descriptions, and the present application is not limited to this, as long as it can ensure that the quantity #A determined by the access device #A and the terminal device #A is consistent .

Thereafter, the access device #A and the terminal device #A can determine the search space set (referred to as, search space set #A) corresponding to the set of the number of receiving antennas of the terminal device to which the number #A belongs according to the above mapping relationship.

Thus, at S230, access device #A may transmit the PDCCH on search space set #A.

Accordingly, terminal device #A may detect PDCCH on search space set #A.

According to the solution provided by the present application, by configuring the mapping relationship between the number of multiple antennas and the multiple search space sets for the terminal device by the access device, when the terminal device detects the PDCCH, it can select the corresponding number of antennas according to the number of antennas currently used. The search space set is used for PDCCH detection. For example, the detection period of the search space set corresponding to a larger number of antennas is small, so that the reliability of data transmission can be ensured and the transmission delay can be reduced; The detection period is small, so that the power consumption of the terminal equipment can be reduced; for another example, the aggregation level of the search space set corresponding to the smaller number of antennas is larger, so that it can be beneficial to improve the detection performance of the PDCCH; The aggregation level of the search space set corresponding to the number of antennas is small, which is conducive to saving system resources; for another example, the resource mapping method of the search space set with a small number of antennas is a non-interleaving mapping method, so that the access device can effectively utilize Scheduling gain; the resource mapping method of the search space set with a large number of antennas is an interleaving mapping method, so that the PDCCH with a lower aggregation level can obtain a diversity gain; thus, it can help to improve the detection performance of the PDCCH and adapt to the amount of traffic. Dynamic changes, reduce communication delay, improve communication reliability, and improve user experience.

FIG. 11 shows a schematic diagram of an example of the downlink control channel detection method 300 of the present application. As shown in FIG. 11 , the access device #a may configure a search space set for the terminal device #a.

By way of example and not limitation, the set of search spaces may be a set of user-specific search spaces of terminal device #a.

Moreover, the access device #a may configure multiple parameter groups for the terminal device #a, wherein each parameter group includes at least one search space parameter and its parameter value.

And, in this application, the search space set parameters may include but not limited to at least one of the following parameters:

A. The detection period of the search space set

That is, the time interval for the terminal device to detect the search space set, and the unit of the detection period may be a slot.

B. Aggregation level of candidate downlink control channels

That is, the value of the aggregation level of the search space of the search space set, or the value of the number of CCEs included in the PDCCH in the search space set.

For example, the value range of an aggregation level may be {1, 2, 4, 8}.

For another example, the value range of another aggregation level may be {1, 2}.

For another example, the value range of another aggregation level may be {4, 8}.

C. The index of the CORESET associated with the search space collection

Wherein, through the index of the CORESET associated with the search space set, the terminal device can know the mapping mode between CCEs and REGs of the candidate control channels of the search space set, for example, it can include interleaved mapping and non-interleaved mapping.

In this application, different parameter groups may correspond to different numbers of receiving antennas (specifically, the number of receiving antennas of a terminal device), or in other words, the at least two parameter groups and the numbers of at least two receiving antennas have a one-to-one relationship Correspondence.

For example, suppose that parameter group #a corresponds to the terminal equipment receiving antenna data set #a, then at least one parameter of the parameter group #a is determined according to the terminal equipment receiving antenna data set #a. As an example and not a limitation, you can enumerate At least one of the following ways to determine.

way 1

When the value (eg, the maximum value) of the number of terminal device receiving antennas in the terminal device receiving antenna data set #a is less than or equal to the preset threshold #a, the detection period in the parameter group #a may be configured to be greater than or equal to Equal to the preset threshold #b.

When the value (eg, the minimum value) of the number of terminal device receiving antennas in the terminal device receiving antenna data set #a is greater than or equal to the preset threshold #c, the detection period of the parameter group #a may be configured to be less than or equal to Preset threshold #d.

Wherein, the threshold #a may be less than or equal to the threshold #c.

The threshold #b may be greater than or equal to the threshold #d.

For example, the value of the threshold #a may be 2, and the value of the threshold #c may be 4.

For another example, the threshold #B may be 10 slots or 16 slots, and the threshold #D may be 2 slots, 4 slots or 5 slots.

When the number of antennas used by the terminal equipment is small (for example, 2), it indicates that the data amount of the downlink data is small. In this case, by setting the detection period of parameter group #a to a large value, the terminal The power consumption of the device.

Correspondingly, when the number of antennas used by the terminal equipment is large (for example, 4), it means that the data amount of the downlink data is large. In this case, by setting the detection period of the parameter group #a to a small value, It can reduce the time delay of data transmission and improve the reliability of communication.

way 2

When the number of values (eg, the maximum value) of the number of terminal device receiving antennas in the terminal device receiving antenna data set #a is less than or equal to the preset threshold #e, the aggregation level of parameter group #a may be configured to be greater than or equal to or equal to the preset threshold #f.

When the number of values (eg, the minimum value) of the number of terminal device receiving antennas in the terminal device receiving antenna data set #a is greater than or equal to the preset threshold #g, the aggregation level of the parameter group #a may be configured to be less than or equal to or equal to the preset threshold #h.

Wherein, the threshold #e may be less than or equal to the threshold #g.

The threshold #f may be greater than or equal to the threshold #h.

For example, the value of the threshold #e may be 2, and the value of the threshold #g may be 4.

In this case, the value of the threshold #f may be 4, and the value of the threshold #h may be 2

When the number of antennas used by the terminal equipment is small (for example, 2), the performance of the terminal equipment to detect the PDCCH may be affected. In this case, increasing the aggregation level is beneficial to improve the detection performance of the PDCCH.

When the number of antennas used by the terminal device is large (for example, 4), the performance of the terminal device in detecting the PDCCH is enhanced. In this case, reducing the aggregation level is beneficial to saving system resources.

way 3

When the number of values (eg, the maximum value) of the number of terminal device receiving antennas in the terminal device receiving antenna data set #a is less than or equal to the preset threshold #i, the index of the CORESET of the parameter group #a may be determined as Index #a, wherein the CCE mapping mode of CORESET of index #a is non-interleaving mapping, so the resource mapping mode of CCEs of candidate control channels based on the search space set of parameter group #a is non-interleaving mapping.

When the number of values (eg, the minimum value) of the number of terminal device receiving antennas in the terminal device receiving antenna data set #a is greater than or equal to the preset threshold #j, the index of the CORESET of the parameter group #a may be determined as Index #b, wherein the CCE mapping mode of the CORESET of index #b is interleaving mapping, so the resource mapping mode of the CCEs of the candidate control channels based on the search space set of parameter group #a is interleaving mapping.

Wherein, the threshold #i may be less than or equal to the threshold #j.

For example, the value of the threshold #i may be 2, and the value of the threshold #j may be 4.

When the number of antennas used by the terminal device is small (for example, 2), by using the non-interleaving mapping method, the access device can effectively utilize the scheduling gain.

When the number of antennas used by the terminal device is large (for example, 4), the PDCCH with a lower aggregation level (for example, 2) can obtain diversity gain through interleaving and mapping.

For another example, suppose parameter group #1 corresponds to terminal equipment receiving antenna data set #1, and parameter group #1 corresponds to terminal equipment receiving antenna data set #2, then if the terminal antenna in the terminal equipment receiving antenna data set #1 receives The value (eg, the maximum value) of the number is smaller than the value (eg, the minimum value) of the number of terminal antennas received in the terminal device receiving antenna data set #2, then the parameter group #a and the parameter group #a can satisfy at least one of the following: a relationship.

Relationship 1

As shown in FIG. 10 , the detection period of parameter group #1 is greater than the detection period of parameter group #2.

In other words, the detection time interval of parameter group #1 is greater than the detection time interval of parameter combination #2.

When the number of antennas used by the terminal equipment is large (for example, 4), it indicates that the data volume of the downlink data is large. Correspondingly, when the number of antennas used by the terminal equipment is small (for example, 2), it indicates that when the downlink data is large The data amount of the data is small, that is, when the value (eg, the maximum value) of the terminal antenna reception number in the terminal device receiving antenna data set #1 is smaller than the value of the terminal antenna reception number in the terminal device receiving antenna data set #2 ( For example, when the minimum value), it indicates that the data volume of the downlink transmission corresponding to the parameter group #1 is smaller than the data volume of the downlink transmission corresponding to the parameter group #1.

It can be seen from this that when parameter group #1 is used, the quantity flow of the terminal equipment is small. In this case, by setting the detection period of parameter group #1 to a larger value, the power consumption of the terminal equipment can be reduced.

In contrast, when parameter group #2 is used, the number of terminal devices is relatively large. In this case, by setting the detection period of parameter group #2 to a smaller value, the delay of data transmission can be reduced and the reliability of communication can be improved. sex.

For example, when the value (eg, the maximum value) of the number of terminal antennas received in the terminal device receiving antenna data set #1 is 2, the detection period of the parameter group #1 may be 10 slots or 16 slots.

For another example, when the value (eg, the minimum value) of the number of terminal antennas received in the terminal device receiving antenna data set #2 is 4, the detection period of the parameter group #2 may be 2 slots, 4 slots, or 5 slots. .

Relationship 2

The value range of the aggregation level of parameter group #1 is smaller than the value range of the aggregation level of parameter group #2.

For example, when the value (eg, the maximum value) of the number of terminal antennas received in the terminal device receiving antenna data set #1 is 2, the value range of the aggregation level of the parameter group #1 may be {4, 8}, or , the value of the aggregation level of parameter group #1 is 4 or 8.

When the value (for example, the minimum value) of the number of terminal antennas received in the terminal device receiving antenna data set #2 is 4, the value range of the aggregation level of the parameter group #2 may be {1, 2, 4, 8}, In other words, the value of the aggregation level of parameter group #2 is one of 1, 2, 4 or 8.

When the number of antennas used by the terminal equipment is small (for example, 2), the performance of the terminal equipment to detect the PDCCH may be affected. In this case, increasing the aggregation level is beneficial to improve the detection performance of the PDCCH.

When the number of antennas used by the terminal device is large (for example, 4), the performance of the terminal device in detecting the PDCCH is enhanced. In this case, reducing the aggregation level is beneficial to saving system resources.

Relationship 3

The resource mapping mode of parameter group #1 is non-interleaving mapping, and the resource mapping mode of parameter group #2 is interleaving mapping.

When the number of antennas used by the terminal device is small (for example, 2), by using the non-interleaving mapping method, the access device can effectively utilize the scheduling gain.

When the number of antennas used by the terminal device is large (for example, 4), the PDCCH with a lower aggregation level (for example, 2) can obtain diversity gain through interleaving and mapping.

The following table a shows an example of the mapping relationship between the number of receiving antennas and the parameter group in the present application.

table a

The following table b shows another example of the mapping relationship between the number of receiving antennas and the parameter group in the present application.

table b

Number of receiving antennas the index of the parameter group Aggregation level 2 index 1 4 or 8 4 Index 2 1, 2, 4 or 8

The following table c shows another example of the mapping relationship between the number of receiving antennas and the parameter group in the present application.

table c

Number of receiving antennas the index of the parameter group Index of CORESET resource mapping 2 index 1 index a non-interleaving mapping 4 Index 2 index b Interleaving Mapping

The following table d shows another example of the mapping relationship between the number of receiving antennas and the parameter group in the present application.

table d

Number of receiving antennas the index of the parameter group Detection period (unit: slot) Aggregation level resource mapping 2 index 1 10 or 16 4 or 8 non-interleaving mapping 4 Index 2 2, 4 or 5 1, 2, 4 or 8 Interleaving Mapping

The following table e shows another example of the mapping relationship between the number of receiving antennas and the set of search spaces in the present application.

table e

Number of receiving antennas index of the search space collection 2 index 1 4 Index 2

In the mapping relationship shown in Table e, the detection period of the parameter group of index 1 may be greater than the detection period of the parameter group of index 2, for example, the detection period of the parameter group of index 1 may be 10 slots or 16 slots, and the detection period of the parameter group of index 2 The detection period of the parameter group can be 2 slots, 4 slots or 5 slots.

Alternatively, the aggregation level of the parameter group of index 1 may be greater than the aggregation level of the parameter group of index 2. For example, the aggregation level of the parameter group of index 1 may be 4 or 8, and the aggregation level of the parameter group of index 2 may be 1, 2 , 4 or 8.

Alternatively, the resource mapping manner of the parameter group of index 1 may be non-interleaved mapping, and the resource mapping manner of the parameter group of index 2 may be interleaved mapping.

At S310, the access device #a may send configuration information #a to the terminal device #a, where the configuration information #a may be used to indicate a search space set configured for the terminal device #a (denoted, search space set #a ).

In addition, the configuration information #a may also indicate the mapping relationship between the at least two parameter groups and the at least two terminal equipment receiving antenna quantity sets, or, the configuration information #a may also indicate the at least two parameter groups in the The set of the number of terminal equipment receiving antennas corresponding to each parameter group of .

At S320, when the access device #a sends the PDCCH to the terminal device #a at the time #a, the access device #a may determine the number of receive antennas used by the terminal device #a at the time #a (denoted, the number #a ).

For example, the access device #a may determine the number #a based on whether or not to transmit the PDCCH to the terminal device #a at time #b, where time #b is a time before time #a and the time #b There is a preset time interval #a between time #a, where the time interval #a may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if access device #a sends a PDCCH to terminal device #a at time #b, access device #a may determine that the value of quantity #a is X, where X may be the The number of receiving antennas used when the data flow is large. For example, the value of X may be 4, where the value of X may be specified by the communication system or communication protocol, or determined by the administrator according to data statistics.

If access device #a does not send a PDCCH to terminal device #a at time #b, then access device #a may determine that quantity #a has a value of Y, where Y may be terminal device #a when the data flow is small The number of used receiving antennas, for example, the value of Y may be 2, where the value of Y may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

For another example, the access device #a may instruct the terminal device #a to report the quantity #a.

For another example, the terminal device #a may periodically report the number of used receiving antennas, so that the access device #a may determine the number of the receiving antennas reported by the terminal device #a for the last time before time #a as the number#. a.

Similarly, terminal device #a can determine the number of currently used receive antennas at time #a.

For example, terminal device #a may determine the number #a based on whether or not PDCCH is detected at time #b, where time #Bb is a time before time #a and the difference between time #b and time #a There is a preset time interval #a, where the time interval #a may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if terminal device #a detects the PDCCH at time #b, terminal device #a may determine that the value of quantity #a is X, where X may be used by terminal device #a when the data flow is large The number of receiving antennas, for example, the value of X may be 4, where the value of X may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

If terminal device #a does not detect a PDCCH at time #b, terminal device #a may determine that quantity #a has a value of Y, where Y may be the number of receive antennas used by terminal device #a when the data stream is small For example, the value of Y may be 2, where the value of Y may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

For another example, the terminal device #a may arbitrarily determine the number #a, and the terminal device #a may report the number #a according to the instruction of the access device #a.

For another example, the terminal device #a may periodically report the number of used receiving antennas, so that the terminal device #a may determine the number of the receiving antennas reported by the terminal device #a for the last time before time #a as the number #a. .

It should be understood that the methods and processes for determining the quantity #a listed above are only exemplary descriptions, and the present application is not limited to this, as long as it can ensure that the quantity #a determined by the access device #a and the terminal device #a is consistent .

Thereafter, the access device #a and the terminal device #a may determine a parameter group (denoted, parameter group #a) corresponding to the set of the number of receiving antennas of the terminal device to which the number #a belongs according to the above mapping relationship.

Thus, at S330, the access device #a may transmit the PDCCH using the parameter group #a on the search space set #a.

Correspondingly, the terminal device #a may detect the PDCCH using the parameter group #a on the search space set #a.

According to the solution provided by the present application, by configuring the mapping relationship between the number of multiple antennas and the multiple search space sets for the terminal device by the access device, when the terminal device detects the PDCCH, it can select the corresponding number of antennas according to the number of antennas currently used. The search space set is used for PDCCH detection. For example, the detection period of the search space set corresponding to a larger number of antennas is small, so that the reliability of data transmission can be ensured and the transmission delay can be reduced; The detection period is small, so that the power consumption of the terminal equipment can be reduced; for another example, the aggregation level of the search space set corresponding to the smaller number of antennas is larger, so that it can be beneficial to improve the detection performance of the PDCCH; The aggregation level of the search space set corresponding to the number of antennas is small, which is conducive to saving system resources; for another example, the resource mapping method of the search space set with a small number of antennas is a non-interleaving mapping method, so that the access device can effectively utilize Scheduling gain; the resource mapping method of the search space set with a large number of antennas is an interleaving mapping method, so that the PDCCH with a lower aggregation level can obtain a diversity gain; thus, it can help to improve the detection performance of the PDCCH and adapt to the amount of traffic. Dynamic changes, reduce communication delay, improve communication reliability, and improve user experience.

FIG. 12 shows a schematic diagram of an example of a downlink control channel detection method 400 of the present application. As shown in FIG. 12 , access device #1 may configure multiple search space sets for terminal device #1.

By way of example and not limitation, the set of search spaces may be a set of user-specific search spaces of terminal device #1.

In this application, at least one different search space set parameter exists between any two search space sets in the multiple search space sets.

Also, in this application, the search space set parameter may include a detection period.

That is, the time interval for the terminal device to detect the search space set, and the unit of the detection period may be a slot.

In this application, different search space sets may correspond to different timers (for example, drx-onDurationTimer and drx-InactivityTimer), or in other words, the at least two search space sets have a one-to-one correspondence with at least two timers.

For example, assuming that the search space set #1 corresponds to the timer #1, at least one parameter of the search space set #1 is determined according to the timer #1.

When the timer #1 is drx-onDurationTimer, the detection period of the search space set #1 may be configured to be greater than or equal to the preset threshold #2.

When the timer #1 is drx-InactivityTimer, the detection period of the search space set #1 may be configured to be less than or equal to the preset threshold #4.

Wherein, threshold #1 may be less than or equal to threshold #3.

The threshold #2 may be greater than or equal to the threshold #4.

For example, the value of the threshold #1 may be 2, and the value of the threshold #3 may be 4.

For another example, threshold #2 may be 10 slots or 16 slots, and threshold #4 may be 2 slots, 4 slots, or 5 slots.

When the drx-onDurationTimer runs (or starts), it indicates that the data amount of the downlink data is small. In this case, by setting the detection period of the search space set #1 to a larger value, the power of the terminal device can be reduced. consumption.

Correspondingly, when drx-InactivityTimer is running, it means that the amount of downlink data is large. In this case, by setting the detection period of search space set #1 to a smaller value, the delay of data transmission can be reduced and the increase of reliability of communication.

As shown in FIG. 13 , the detection period of the search space set #a is greater than the detection period of the search space set #b.

In other words, the detection time interval of the search space set #a is greater than the detection time interval of the search space set #b.

Table 6 below shows an example of the mapping relationship between the timer and the search space set of the present application.

Table 6

timer index of the search space collection Detection period (unit: slot) drx-onDurationTimer index 1 10 or 16 drx-InactivityTimer Index 2 2, 4 or 5

Table 7 below shows another example of the mapping relationship between the timer and the search space set of the present application.

Table 7

timer index of the search space collection drx-onDurationTimer index 1 drx-InactivityTimer Index 2

In the mapping relationship shown in Table 7, the detection period of the search space set of index 1 may be greater than the detection period of the search space set of index 2, for example, the detection period of the search space set of index 1 may be 10 slots or 16 slots , the detection period of the search space set of index 2 can be 2 slots, 4 slots or 5 slots.

At S410, access device #1 may send configuration information #1 to terminal device #1, where configuration information #1 may be used to indicate a parameter of each search space set in the at least two search space sets, wherein the parameter may be Including but not limited to at least one of the above parameters 1 to 6.

In addition, the configuration information #1 may also indicate the mapping relationship between the at least two search space sets and at least two timers, or in other words, the configuration information #1 may also indicate each of the at least two search space sets The timers corresponding to each search space set.

In S420, when the access device #1 sends the PDCCH to the terminal device #1 at the time #1, the access device #1 may determine the timer (denoted, timer #X) started by the terminal device #1 at the time #1. .

For example, access device #1 may determine the timer #X according to the DRX cycle configured for terminal device #1 and whether or not to send a PDCCH to terminal device #1 at time #2, where time #2 is at time The time before #1, and there is a preset time interval #1 between the time #2 and the time #1, wherein the time interval #1 may be specified by the communication system or communication protocol, or may be specified by the administrator according to the Statistically determined.

Specifically, if the access device #1 sends the PDCCH to the terminal device #1 at time #2, the access device #1 may determine that the timer #X is drx-InactivityTimer.

If access device #1 does not transmit the PDCCH to terminal device #1 at time #2, access device #1 may determine timer #X to be drx-onDurationTimer.

And, the terminal device #1 can determine the timer #X running at time #1.

It should be understood that the method and process for determining the timer #X listed above are only exemplary descriptions, and the present application is not limited to this, as long as it can ensure that the timer #X determined by the access device #1 and the terminal device #1 is consistent That's it.

Thereafter, the access device #1 and the terminal device #1 may determine the search space set corresponding to the timer #X (referred to as search space set #1) according to the above-mentioned mapping relationship.

Thus, at S430, access device #1 may transmit the PDCCH on search space set #1.

Accordingly, terminal device #1 may detect PDCCH on search space set #1.

According to the solution provided in this application, by configuring the mapping relationship between multiple timers and multiple search space sets for the terminal device by the access device, when the terminal device detects the PDCCH, it can select the corresponding timer according to the currently used timer. The search space set performs PDCCH detection. For example, the detection period of the search space set corresponding to drx-InactivityTimer is small, thereby ensuring the reliability of data transmission and reducing the transmission delay; the detection period of the search space set corresponding to drx-onDurationTimer is small. Therefore, the power consumption of the terminal device can be reduced, thereby improving the detection performance of the PDCCH, adapting to the dynamic change of the quantity traffic, reducing the communication delay, improving the reliability of the communication, and improving the user experience.

FIG. 14 shows a schematic diagram of an example of a downlink control channel detection method 500 of the present application. As shown in FIG. 12 , the access device #m can configure a search space set for the terminal device #m (denoted as: search space #m ).

By way of example and not limitation, the set of search spaces may be a set of user-specific search spaces of terminal device #m.

Moreover, the access device #m may configure multiple parameter groups for the terminal device #m, wherein each parameter group includes at least one search space parameter and its parameter value.

And, in this application, the search space set parameter may include but not limited to the detection period.

That is, the time interval for the terminal device to detect the search space set, and the unit of the detection period may be a slot.

In this application, different parameter groups may correspond to different timers (for example, drx-onDurationTimer and drx-InactivityTimer), or in other words, the at least two parameter groups have a one-to-one correspondence with at least two timers.

For example, if the parameter group #m corresponds to the timer #m, at least one parameter of the parameter group #m is determined according to the timer #m.

When the timer #m is drx-onDurationTimer, the detection period of the parameter group #m may be configured to be greater than or equal to the preset threshold #2.

When the timer #m is drx-InactivityTimer, the detection period of the parameter group #m may be configured to be less than or equal to the preset threshold #4.

Wherein, the threshold #m may be less than or equal to the threshold #3.

The threshold #2 may be greater than or equal to the threshold #4.

For example, the value of the threshold #m may be 2, and the value of the threshold #3 may be 4.

For another example, threshold #2 may be 10 slots or 16 slots, and threshold #4 may be 2 slots, 4 slots, or 5 slots.

When drx-onDurationTimer runs (or starts), it indicates that the data volume of downlink data is small. In this case, by setting the detection period of parameter group #m to a larger value, the power consumption of the terminal device can be reduced .

Correspondingly, when drx-InactivityTimer is running, it means that the data volume of downlink data is large. In this case, by setting the detection period of parameter group #m to a small value, the delay of data transmission can be reduced and the communication can be improved. reliability.

As shown in FIG. 13 , the detection period of parameter group #a is larger than the detection period of parameter group #b.

In other words, the detection time interval of search space set #a is greater than the detection time interval of parameter combination #b.

The following table f shows an example of the mapping relationship between timers and parameter groups in the present application.

table f

timer the index of the parameter group Detection period (unit: slot) drx-onDurationTimer index 1 10 or 16 drx-InactivityTimer Index 2 2, 4 or 5

The following table g shows another example of the mapping relationship between timers and parameter groups in the present application.

table g

In the mapping relationship shown in Table g, the detection period of the parameter group of index 1 may be greater than the detection period of the parameter group of index 2, for example, the detection period of the parameter group of index 1 may be 10 slots or 16 slots, and the detection period of the parameter group of index 2 The detection period of the parameter group can be 2 slots, 4 slots or 5 slots.

At S510, the access device #m may send configuration information #m to the terminal device #m, where the configuration information #m may be used to refer to a parameter of the search space #m, where the parameter may include but not limited to the above-mentioned parameters 1 to 1 6 at least one of the parameters.

In addition, the configuration information #m may also indicate the mapping relationship between the at least two parameter groups and the at least two timers, or in other words, the configuration information #m may also indicate each parameter in the at least two parameter groups The timer corresponding to the group.

In S520, when the access device #m sends the PDCCH to the terminal device #m at the time #m, the access device #m may determine the timer started by the terminal device #m at the time #m (denoted, timer #m) .

For example, the access device #m may determine the timer #m according to the DRX cycle configured for the terminal device #m and whether the PDCCH is sent to the terminal device #m at time #n, where time #n is at time The time before #m, and there is a preset time interval #m between the time #n and the time #m, wherein the time interval #m may be specified by the communication system or communication protocol, or may be determined by the administrator according to the Statistically determined.

Specifically, if the access device #m sends the PDCCH to the terminal device #m at time #n, the access device #m may determine that the timer #m is drx-InactivityTimer.

If the access device #m does not transmit the PDCCH to the terminal device #m at time #n, the access device #m may determine that the timer #m is drx-onDurationTimer.

And, the terminal device #m can determine the timer #m running at time #m.

It should be understood that the method and process for determining the timer #m listed above are only exemplary descriptions, and the present application is not limited to this, as long as it can ensure that the timer #m determined by the access device #m and the terminal device #m is consistent That's it.

Afterwards, the access device #m and the terminal device #m can determine the parameter group corresponding to the timer #X (referred to as parameter group #m) according to the above-mentioned mapping relationship.

Thus, at S530, the access device #m may transmit the PDCCH using the parameter group #m on the search space set #m.

Correspondingly, the terminal device #m may detect the PDCCH on the search space set #m using the parameter group #m.

According to the solution provided in this application, by configuring the mapping relationship between multiple timers and multiple search space sets for the terminal device by the access device, when the terminal device detects the PDCCH, it can select the corresponding timer according to the currently used timer. The search space set performs PDCCH detection. For example, the detection period of the search space set corresponding to drx-InactivityTimer is small, thereby ensuring the reliability of data transmission and reducing the transmission delay; the detection period of the search space set corresponding to drx-onDurationTimer is small. Therefore, the power consumption of the terminal device can be reduced, thereby improving the detection performance of the PDCCH, adapting to the dynamic change of the quantity traffic, reducing the communication delay, improving the reliability of the communication, and improving the user experience.

According to the foregoing method, FIG. 15 is a schematic diagram of an apparatus 500 for wireless communication provided by an embodiment of the present application.

Wherein, the apparatus 600 may be a terminal device, and may also be a chip or a circuit, for example, a chip or a circuit that can be provided in the terminal device.

The apparatus 600 may include a processing unit 610 (ie, an example of a processing unit) and a storage unit 620 . The storage unit 620 is used to store instructions.

The processing unit 610 is configured to execute the instructions stored in the storage unit 620, so that the apparatus 600 implements the steps performed by a terminal device (eg, terminal device #A or terminal device #1) in the above method.

Further, the apparatus 600 may further include an input port 630 (ie, an example of a communication unit) and an output port 640 (ie, another example of a communication unit). Further, the processing unit 610, the storage unit 620, the input port 630 and the output port 640 can communicate with each other through an internal connection path to transmit control and/or data signals. The storage unit 620 is used to store a computer program, and the processing unit 610 can be used to call and run the computer program from the storage unit 620 to control the input port 630 to receive signals, and control the output port 640 to send signals, so as to complete the above method. Steps for terminal equipment. The storage unit 620 may be integrated in the processing unit 610 , or may be provided separately from the processing unit 610 .

Optionally, if the apparatus 600 is a communication device (for example, a terminal device), the input port 630 is a receiver, and the output port 640 is a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 600 is a chip or a circuit, the input port 630 is an input interface, and the output port 640 is an output interface.

As an implementation manner, the functions of the input port 630 and the output port 640 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processing unit 610 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processing unit or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the communication device (for example, an access device or a terminal device) provided in this embodiment of the present application. The program codes that will implement the functions of the processing unit 610, the input port 630 and the output port 640 are stored in the storage unit 620, and the general processing unit implements the functions of the processing unit 610, the input port 630 and the output port 640 by executing the codes in the storage unit 620. .

In an implementation manner, the processing unit 610 is configured to determine the first search space set according to the number of currently used receiving antennas; the processing unit 610 is configured to control the input port 630 to detect the downlink control channel according to the first search space set.

Optionally, the processing unit 610 is configured to determine a first set of search spaces from at least two search spaces according to the number of currently used receiving antennas, between any two sets of search spaces in the at least two sets of search spaces. There is at least one different parameter including:

Detection period, aggregation level or resource mapping method or search space set index.

Optionally, the input port 630 is configured to receive first configuration information, where the first configuration information is used to indicate a mapping relationship between the numbers of at least two receiving antennas and the at least two search space sets;

The processing unit 610 is configured to determine, by the terminal device, a search space set corresponding to the number of currently used receiving antennas indicated by the first configuration information as a first search space set.

Optionally, the processing unit 610 is configured to determine a parameter of the first search space set according to the number of currently used receiving antennas, where the parameter includes at least one parameter of a detection period, an aggregation level or a resource mapping manner.

Optionally, the input port 630 is used to receive second configuration information, where the second configuration information is used to indicate the number of receiving antennas corresponding to each parameter group in the multiple parameter groups, wherein each parameter group includes a detection period, an aggregation The parameter value of at least one parameter in the level or resource mapping method;

The processing unit 610 is configured to determine the parameters in the parameter group indicated by the second configuration information and corresponding to the number of currently used receiving antennas as parameters of the first search space set.

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

The functions and actions of the modules or units in the apparatus 600 listed above are only illustrative, the apparatus 600 is configured in or itself is a terminal device, and each module or unit in the apparatus 600 can be used to execute the terminal device in the above method. For each action or processing process performed by (for example, terminal device #A or terminal device #z1), in order to avoid redundant description, the detailed description thereof is omitted.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the apparatus 600, for explanations and detailed descriptions and other steps, please refer to the descriptions of the foregoing methods or other embodiments, which will not be repeated here.

According to the foregoing method, FIG. 16 is a schematic diagram of an apparatus 700 for wireless communication provided by an embodiment of the present application.

Wherein, the apparatus 700 may be an access device (eg, access device #A or access device #1), or may be a chip or circuit, such as a chip or circuit that may be provided in the access device.

The apparatus 700 may include a processing unit 710 (ie, an example of a processing unit) and a storage unit 720 . The storage unit 720 is used to store instructions.

The processing unit 710 is configured to execute the instructions stored in the storage unit 720, so that the apparatus 700 implements the steps performed by the access device in the above method.

Further, the apparatus 700 may further include an input port 730 (ie, an example of a communication unit) and an output port 740 (ie, another example of a communication unit). Further, the processing unit 710, the storage unit 720, the input port 730 and the output port 740 can communicate with each other through an internal connection path to transmit control and/or data signals. The storage unit 720 is used to store a computer program, and the processing unit 710 can be used to call and run the computer program from the storage unit 720 to control the input port 730 to receive signals, and control the output port 740 to send signals to complete the above method. Steps for terminal equipment. The storage unit 720 may be integrated in the processing unit 710 , or may be provided separately from the processing unit 710 .

Optionally, if the apparatus 700 is a communication device (eg, an access device), the input port 730 is a receiver, and the output port 740 is a transmitter. The receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 700 is a chip or a circuit, the input port 730 is an input interface, and the output port 740 is an output interface.

As an implementation manner, the functions of the input port 730 and the output port 740 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processing unit 710 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processing unit or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the communication device (for example, an access device) provided in the embodiments of the present application. The program codes that will implement the functions of the processing unit 710, the input port 730 and the output port 740 are stored in the storage unit 720, and the general processing unit implements the functions of the processing unit 710, the input port 730 and the output port 740 by executing the codes in the storage unit 720. .

In an implementation manner, the processing unit 710 is configured to determine the first search space set according to the number of receiving antennas currently used by the terminal device;

The processing unit 710 is configured to control the output port 740 to send the downlink control channel according to the first search space set.

Optionally, the processing unit 710 is configured to determine the mapping relationship between the numbers of at least two receiving antennas and at least two search space sets, and there is at least one between any two search space sets in the at least two search space sets. The parameters include: detection period, aggregation level or resource mapping method or search space set index; and are used to determine the search space set corresponding to the number of currently used receiving antennas as the first search space set.

Optionally, the output port 740 is configured to send first configuration information to the terminal device, where the first configuration information is used to indicate a mapping relationship between the numbers of the at least two receiving antennas and the at least two search space sets.

Optionally, the processing unit 710 is configured to determine the number of receiving antennas corresponding to each parameter group in the multiple parameter groups, wherein each parameter group includes a parameter value of at least one parameter in a detection period, an aggregation level or a resource mapping manner. ; and is used to determine the parameters in the parameter group corresponding to the number of receiving antennas currently used by the terminal device as the parameters of the first search space set.

Optionally, the output port 740 is configured to send second configuration information to the terminal device, where the second configuration information is used to indicate the number of receiving antennas corresponding to each parameter group in the multiple parameter groups.

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

The functions and actions of the modules or units in the apparatus 700 listed above are only exemplary descriptions. When the apparatus 700 is configured in or is an access device, the modules or units in the apparatus 700 can be used to execute the above method. Each action or processing process performed by the access device (for example, access device #A or access device #1) is omitted here to avoid redundant descriptions.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the apparatus 700, for explanations, detailed descriptions, and other steps, please refer to the descriptions of the foregoing methods or other embodiments, which will not be repeated here.

FIG. 17 is a schematic structural diagram of a terminal device 800 provided by this application. The above-mentioned apparatus 600 may be configured in the terminal device 800 , or the above-mentioned apparatus 600 itself may be the terminal device 800 . In other words, the terminal device 800 may perform the actions performed by the terminal device in the foregoing methods 200, 300, 400 or 500.

For convenience of explanation, FIG. 17 only shows the main components of the terminal device. As shown in FIG. 17 , the terminal device 800 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs, for example, for supporting the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment. the described action. The memory is mainly used to store software programs and data, such as the codebook described in the above embodiments. The control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The control circuit together with the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for the convenience of description, FIG. 17 only shows one memory and a processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

For example, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data. The processor in FIG. 17 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, which are interconnected through technologies such as a bus. Those skilled in the art can understand that a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, in this embodiment of the present application, an antenna and a control circuit with a transceiver function may be regarded as the transceiver unit 810 of the terminal device 800 , and a processor with a processing function may be regarded as the processing unit 820 of the terminal device 800 . As shown in FIG. 800 , the terminal device 800 includes a transceiver unit 810 and a processing unit 820 . The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like. Optionally, the device for implementing the receiving function in the transceiver unit 810 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 810 may be regarded as a transmitting unit, that is, the transceiver unit includes a receiving unit and a transmitting unit. Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.

FIG. 18 is a schematic structural diagram of an access device 900 according to an embodiment of the present application, which may be used to implement the functions of the access device (eg, access device #A or access device #1) in the foregoing method. The access device 900 includes one or more radio frequency units, such as a remote radio unit (RRU) 910 and one or more baseband units (BBU) (also referred to as digital units, digital units, DUs) )920. The RRU 910 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 911 and a radio frequency unit 912 . The RRU910 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending the signaling messages described in the above embodiments to terminal equipment. The part of the BBU920 is mainly used to perform baseband processing and control the base station. The RRU 910 and the BBU 920 may be physically set together or physically separated, that is, a distributed base station.

The BBU920 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU (processing unit) 920 may be used to control the base station 40 to perform the operation procedures related to the network device in the foregoing method embodiments.

In an example, the BBU920 may be composed of one or more single boards, and the multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE system or a 5G system), or may support different access modes respectively. into the standard wireless access network. The BBU 920 also includes a memory 921 and a processor 922 . The memory 921 is used to store necessary instructions and data. For example, the memory 921 stores the codebook and the like in the above-described embodiments. The processor 922 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow of the network device in the foregoing method embodiments. The memory 921 and processor 922 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.

In a possible implementation, with the development of system-on-chip (SoC) technology, all or part of the functions of part 920 and part 910 can be implemented by SoC technology, for example, a base station function chip Implementation, the base station function chip integrates a processor, a memory, an antenna interface and other devices, the program of the base station related functions is stored in the memory, and the processor executes the program to realize the related functions of the base station. Optionally, the base station function chip can also read the external memory of the chip to realize the related functions of the base station.

It should be understood that the structure of the access device illustrated in FIG. 18 is only a possible form, and should not constitute any limitation to the embodiments of the present application. This application does not exclude the possibility of other forms of base station structures that may appear in the future.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, which includes the aforementioned access device and one or more terminal devices.

It should be understood that in this embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits ( application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access Memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server or data center by wire (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that contains one or more sets of available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. Furthermore, the terms "at least one of" or "at least one of" or similar expressions herein mean any combination of the listed items, eg, at least one of A, B, and C (or At least one of A, B or C), can mean: A alone exists, B alone exists, C alone exists, A and B exist simultaneously, A and C exist simultaneously, B and C exist simultaneously, A, B and C these seven cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk and other media that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (39)

1. A method of wireless communication, comprising:

the terminal equipment determines a first search space set according to the number of currently used receiving antennas;

and the terminal equipment detects a downlink control channel according to the first search space set.

2. The method of claim 1, wherein the terminal device determines the first set of search spaces according to a currently used number of receiving antennas, and comprises:

and the terminal equipment determines the first search space set from at least two search space sets according to the number of currently used receiving antennas.

3. The method of claim 2, each of the at least two sets of search spaces being associated with a set of terminal device number of receive antennas, wherein the set of terminal device number of receive antennas comprises at least one number of terminal device receive antennas, an

And the first search space set is a search space set of the number of the receiving antennas of the associated terminal equipment, wherein the search space set comprises the number of the receiving antennas currently used by the terminal equipment.

4. The method according to claim 2 or 3, wherein there is at least one different parameter between any two of the at least two sets of search spaces, the parameter comprising:

the detection period of the search space set, the aggregation level of the candidate downlink control channels or the index of the control resource set CORESET associated with the search space set.

5. The method according to any one of claims 2 to 4, further comprising:

and the terminal equipment receives first configuration information, wherein the first configuration information is used for indicating a terminal equipment receiving antenna number set associated with each search space set in the at least two search space sets.

6. The method of claim 1, wherein the terminal device determines the first set of search spaces according to a currently used number of receiving antennas, and comprises:

the terminal equipment determines parameters of the first search space set according to the number of currently used receiving antennas, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels and an index of CORESET associated with the search space set.

7. The method of claim 6, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and

the parameters of the first search space set are parameters in a parameter group of the associated terminal equipment receiving antenna number set including the number of receiving antennas currently used by the terminal equipment.

8. The method of claim 7, further comprising:

and the terminal equipment receives second configuration information, wherein the second configuration information is used for indicating the number of receiving antennas associated with each parameter group in the at least two parameter groups.

9. The method according to any of claims 1 to 8, wherein the at least two search space sets are dedicated search space sets of the terminal device.

10. A method of wireless communication, comprising:

the access equipment determines a first search space set according to the number of receiving antennas currently used by the terminal equipment;

and the access equipment sends a downlink control channel according to the first search space set.

11. The method of claim 10, wherein the determining, by the access device, the first set of search spaces according to the number of currently used receiving antennas of the terminal device comprises:

the access equipment determines a first search space set from at least two search space sets according to the number of currently used receiving antennas.

12. The method of claim 11, wherein each of the at least two sets of search spaces is associated with a set of terminal device receive antenna numbers, wherein the set of terminal device receive antenna numbers comprises at least one terminal device receive antenna number, and wherein

And the first search space set is a search space set of the number of the receiving antennas of the associated terminal equipment, wherein the search space set comprises the number of the receiving antennas currently used by the terminal equipment.

13. The method according to claim 11 or 12, wherein there is at least one different parameter between any two of the at least two sets of search spaces, the parameter comprising:

the detection period of the search space set, the aggregation level of the candidate downlink control channels or the index of the control resource set CORESET associated with the search space set.

14. The method according to claim 12 or 13, characterized in that the method further comprises:

the access device sends first configuration information, where the first configuration information is used to indicate the number of receiving antennas associated with each of the at least two search space sets.

15. The method of claim 10, wherein the determining, by the access device, the first set of search spaces according to the number of currently used receiving antennas of the terminal device comprises:

and the access equipment determines parameters of the first search space set according to the number of the receiving antennas currently used by the terminal equipment, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of the candidate downlink control channels and an index of a CORESET associated with the search space set.

16. The method of claim 15, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and

the parameters of the first search space set are parameters in a parameter group of the associated terminal equipment receiving antenna number set including the number of receiving antennas currently used by the terminal equipment.

17. The method of claim 16, further comprising:

the access device sends second configuration information, where the second configuration information is used to indicate the number of receiving antennas associated with each parameter group in the at least two parameter groups.

18. The method according to any of claims 10 to 17, wherein the at least two search space sets are dedicated search space sets of the terminal device.

19. A terminal device, comprising:

the processing unit is used for determining a first search space set according to the number of the receiving antennas currently used by the terminal equipment;

and the transceiver unit is used for detecting the downlink control channel according to the first search space set.

20. The apparatus of claim 19, wherein the processing unit is further configured to:

and determining the first search space set from at least two search space sets according to the number of receiving antennas currently used by the terminal equipment.

21. The apparatus of claim 19, each of the at least two sets of search spaces is associated with a set of terminal device receive antenna numbers, wherein a set of receive antenna numbers includes at least one terminal device receive antenna number, and

and the first search space set is a search space set of the number of the receiving antennas of the associated terminal equipment, wherein the search space set comprises the number of the receiving antennas currently used by the terminal equipment.

22. The apparatus of claim 20 or 21, wherein at least one different parameter exists between any two of the at least two sets of search spaces, and wherein the parameter comprises:

the detection period of the search space set, the aggregation level of the candidate downlink control channels or the index of the control resource set CORESET associated with the search space set.

23. The apparatus according to any of claims 20 to 22, wherein the transceiver unit is further configured to:

and receiving first configuration information, wherein the first configuration information is used for indicating a set of receiving antenna numbers of the terminal equipment associated with each of the at least two search space sets.

24. The apparatus of claim 19, wherein the processing unit is further configured to:

and determining parameters of a first search space set according to the number of receiving antennas currently used by the terminal equipment, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of the candidate downlink control channels and an index of a CORESET associated with the search space set.

25. The apparatus of claim 24, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and wherein

The parameters of the first search space set are parameters in a parameter group of the associated terminal equipment receiving antenna number set including the number of receiving antennas currently used by the terminal equipment.

26. The apparatus of claim 25, wherein the transceiver unit is further configured to:

receiving second configuration information, where the second configuration information is used to indicate the number of receiving antennas associated with each of the at least two parameter groups.

27. The apparatus according to any of claims 19-26, wherein the at least two search space sets are dedicated search space sets for the terminal device.

28. An access device, comprising:

the processing unit is used for determining a first search space set according to the number of currently used receiving antennas of the terminal equipment;

and the transceiver unit is used for transmitting the downlink control channel according to the first search space set.

29. The apparatus of claim 28, wherein the processing unit is further configured to:

and determining a first search space set from at least two search space sets according to the number of currently used receiving antennas.

30. The apparatus of claim 29, wherein each of the at least two sets of search spaces is associated with a set of terminal device receive antenna numbers, wherein the set of terminal device receive antenna numbers comprises at least one terminal device receive antenna number, and wherein

And the first search space set is a search space set of the number of the receiving antennas of the associated terminal equipment, wherein the search space set comprises the number of the receiving antennas currently used by the terminal equipment.

31. The apparatus according to claim 29 or 30, wherein there is at least one different parameter between any two of the at least two sets of search spaces, the parameter comprising:

the detection period of the search space set, the aggregation level of the candidate downlink control channels or the index of the control resource set CORESET associated with the search space set.

32. The apparatus according to claim 30 or 31, wherein the transceiver unit is further configured to:

and sending first configuration information, wherein the first configuration information is used for indicating the number of receiving antennas associated with each of the at least two search space sets.

33. The apparatus of claim 28, wherein the processing unit is further configured to:

and determining parameters of a first search space set according to the number of receiving antennas currently used by the terminal equipment, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of the candidate downlink control channels and an index of a CORESET associated with the search space set.

34. The apparatus of claim 33, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and wherein

The parameters of the first search space set are parameters in a parameter group of the associated terminal equipment receiving antenna number set including the number of receiving antennas currently used by the terminal equipment.

35. The apparatus of claim 34, wherein the transceiver unit is further configured to:

and sending second configuration information, wherein the second configuration information is used for indicating the number of receiving antennas associated with each parameter group in the at least two parameter groups.

36. The apparatus according to any of claims 28-35, wherein the at least two search space sets are dedicated search space sets for the terminal device.

37. A computer-readable storage medium, having stored thereon a computer program which, when run on a computer,

cause the computer to perform the method of any one of claims 1 to 9, or

Causing the computer to perform the method of any one of claims 10 to 18.

38. A chip system, comprising: a processor for calling and running the computer program from the memory,

causing a communication device on which the chip system is mounted to perform the method of any one of claims 1 to 9; or

Causing a communication device on which the chip system is mounted to perform the method of any one of claims 10 to 18.

39. An apparatus for wireless communication, the apparatus comprising a processor and a storage medium having instructions stored thereon that, when executed by the processor,

cause the processor to perform the method of any one of claims 1 to 9, or

Causing the processor to perform the method of any one of claims 10 to 18.

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