CN116803037A

CN116803037A - Communication method, communication device, and readable storage medium

Info

Publication number: CN116803037A
Application number: CN202180090059.2A
Authority: CN
Inventors: 张京华; 简·沙希德; 生嘉
Original assignee: JRD Communication Shenzhen Ltd
Current assignee: JRD Communication Shenzhen Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2023-09-22
Also published as: WO2022151474A1

Abstract

The application discloses a communication method, which comprises the following steps: splitting a first PDCCH to be transmitted into n second PDCCHs, wherein n is greater than 1, and the aggregation degree of each second PDCCH is lower than that of the first PDCCH; time-frequency resources are allocated to each second PDCCH; and transmitting n second PDCCHs to the user equipment by using the allocated time-frequency resources. Therefore, the problems that the PDCCH with high polymerization degree is easy to cause blockage and the PDCCH with high polymerization degree consumes more resources in the prior art are solved.

Description

Communication method, communication device, and readable storage medium

[ field of technology ]

The present application relates to the field of communications, and in particular, to a communication method, a communication device, and a readable storage medium.

[ background Art ]

Wireless communication systems and networks, such as the fifth generation (the 5th generation,5G) mobile communication standards and technologies, are well known. Such 5G standards and technologies were developed by the third generation partnership project (3G Partnership Project,3GPP).

Currently 3GPP is under study item "support study for NR devices of reduced capability (Reduced Capability, redCap). Examples of uses for RedCap include industrial wireless sensors, video surveillance and wearable devices. The main requirements of the RedCap device are reduced device cost and complexity compared to high performance user devices, and furthermore have specific requirements such as data rate, delay, battery life, availability and reliability. The RedCap device is limited by bandwidth limitations and is prone to congestion when it is used in a highly aggregated physical downlink control channel (Physical Downlink Control Channel, PDCCH).

[ application ]

The application mainly solves the technical problem of providing a communication method, a communication device and a readable storage medium, and can solve the problems that a PDCCH with high polymerization degree is easy to cause blockage and the PDCCH with high polymerization degree consumes more resources in the prior art.

In order to solve the above technical problem, a first aspect of the present application provides a communication method, including: splitting a first PDCCH to be transmitted into n second PDCCHs, wherein n is greater than 1, and the aggregation degree of each second PDCCH is lower than that of the first PDCCH; time-frequency resources are allocated to each second PDCCH; and transmitting n second PDCCHs to the user equipment by using the allocated time-frequency resources.

In order to solve the above technical problem, a second aspect of the present application provides a communication method, including: blind decoding the plurality of search spaces to receive n second PDCCHs, n >1; and combining the n second PDCCHs to obtain a first PDCCH, wherein the aggregation degree of each second PDCCH is lower than that of the first PDCCH.

In order to solve the technical problem, a third aspect of the present application provides a communication device, which includes a processor and a communication circuit, the processor being connected to the communication circuit; the processor is configured to execute instructions to implement the communication method as provided in any one of the first aspects of the present application.

In order to solve the above technical problem, a fourth aspect of the present application provides a communication device, the device including a processor and a communication circuit, the processor being connected to the communication circuit; the processor is configured to execute instructions to implement a communication method as provided in the second aspect of the application.

In order to solve the above technical problem, the present application provides a readable storage medium storing instructions that when executed implement the method described above.

The beneficial effects of the application are as follows: splitting a first PDCCH with high aggregation degree to be transmitted into second PDCCHs with low aggregation degree, and distributing time-frequency resources for each second PDCCH, wherein the base station transmits the second PDCCH to the user equipment by utilizing the distributed time-frequency resources, thereby solving the problems that the PDCCH with high aggregation degree is easy to cause blockage and the PDCCH with high aggregation degree consumes more resources in the prior art

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic diagram of a wireless communication system or network according to an embodiment of the present application;

FIG. 2 is a flow chart of a first embodiment of the communication method of the present application;

fig. 3 is a schematic diagram of a first embodiment of time-frequency resource allocation according to the present application;

fig. 4 is a schematic diagram of a second embodiment of time-frequency resource allocation according to the present application;

fig. 5 is a schematic diagram of a third embodiment of time-frequency resource allocation according to the present application;

fig. 6 is a diagram of a fourth embodiment of time-frequency resource allocation according to the present application;

fig. 7 is a schematic diagram of a fifth embodiment of time-frequency resource allocation according to the present application;

FIG. 8 is a flow chart of a second embodiment of the communication method of the present application

Fig. 9 is a schematic structural view of a first embodiment of the communication device of the present application;

fig. 10 is a schematic structural view of a second embodiment of the communication device of the present application;

fig. 11 is a schematic structural view of an embodiment of the readable storage medium of the present application.

[ detailed description ] of the application

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and the following embodiments may be combined with each other without conflict. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

A "user device" in the present application may include or represent any portable computing device for communication. Examples of user devices that may be used in certain embodiments of the described devices, methods and systems may be wired or wireless devices, such as mobile devices, mobile phones, terminals, smart phones, portable computing devices, such as laptops, handheld devices, tablets, netbooks, personal digital assistants, music players, and other computing devices capable of wired or wireless communication. In addition, the user equipment may also be a reduced capability (Reduced Capability) user equipment.

Fig. 1 is a schematic diagram of a wireless communication system or network 100 including a core network 102 (or telecommunications infrastructure) having a plurality of network nodes 104a-104m (e.g., base stations, gnbs) serving cells 106a-106m of a plurality of wireless communication units 108a-108e (e.g., UEs). A plurality of network nodes 104a-104m are connected to the core network 102 by links. These links may be wired or wireless (e.g., radio communication links, optical fibers, etc.). The core network 102 may include a plurality of core network nodes, network entities, application servers, or any other network or computing device that may communicate with one or more radio access networks including a plurality of network nodes 104a-104 m.

In this example, the network nodes 104a-104m are illustrated as base stations, which may be, for example and without limitation, gNBs in a 5G network. Each of the plurality of network nodes 104a-104m (e.g., base stations) has a footprint (footprint) that, for simplicity and by way of example and not limitation, schematically represents in fig. 1 a corresponding circular cell 106a-106m for serving one or more UEs 108a-108 e. The UEs 108a-108e are capable of receiving services, such as voice, video, audio, or other communication services, from the wireless communication system 100.

The wireless communication system or network 100 may include or represent any one or more communication networks for communication between the UEs 108a-108e and other devices, content sources, or servers connecting the wireless communication system or network 100. The core network 102 may also include or represent one or more communication networks, one or more network nodes, entities, elements, application servers, base stations, or other network devices coupled or connected to form the wireless communication system or network 100. Links or couplings between network nodes may be wired or wireless (e.g., radio communications links, optical fibers, etc.). The wireless communication system or network 100 and the core network 102 may include any suitable combination of core networks and radio access networks including network nodes or entities, base stations, access points, etc., that enable communication between the UEs 108a-108e, the wireless communication system 100 and the network nodes 104a-104m of the core network 102, content sources, and/or other devices connected to the system or network 100.

Examples of wireless communication networks 100 that may be used in some embodiments of the described devices, methods and systems may be at least one communication network or a combination thereof, including but not limited to one or more wired and/or wireless telecommunication networks, one or more core networks, one or more radio access networks, one or more computer networks, one or more data communication networks, the internet, a telephone network, a wireless network, such as WiMAX, WLAN and/or Wi-Fi networks based on the IEEE802.11 standard as just an example, or an internet protocol (Internet Protocol, IP) network, a packet switched network or an enhanced packet switched network, an IP multimedia subsystem (IP Multimedia Subsystem, IMS) network or a wireless, cellular or satellite technology based communication network, such as a mobile network, a global system for mobile communication (Global System for Mobile Communications, GSM), a GPRS network, wideband code division multiple access (Wideband Code Division Multiple Access, W-CDMA), CDMA2000 or LTE/LTE advanced communication network or any second, third, fourth or fifth and beyond type communication network, etc.

In the example of fig. 1, the wireless communication system 100 may be, by way of example only and not limitation, a 5G communication network using cyclic prefix orthogonal frequency division multiplexing (cyclic prefix orthogonal frequency division multiplexing, CP-OFDM) techniques for downlink and uplink channels. The downlink may include one or more communication channels for transmitting data from one or more gNBs 104a-104m to one or more UEs 108a-108 e. The downlink channel is typically a communication channel for transmitting data, e.g., from the gNB 104a to the UE108 a.

Both the uplink and downlink for 5G networks are divided into radio frames (e.g., each frame may be 10ms in length), where each frame may be divided into multiple subframes. For example, each frame may include 10 subframes of equal length, where each subframe is composed of a plurality of slots (e.g., 2 slots) for transmitting data. In addition to the slot, a subframe may include several additional special fields or OFDM symbols, which may include, by way of example only, downlink synchronization symbols, broadcast symbols, and/or uplink reference symbols.

Wherein a Physical Downlink Control Channel (PDCCH) in the downlink may carry Downlink Control Information (DCI). PDCCH candidates are transmitted in a control resource set (CORESET) that spans one, two, or three consecutive OFDM symbols over multiple Resource Blocks (RBs). The PDCCH candidates may be carried by 1, 2, 4, 8, or 16 Control Channel Elements (CCEs). Each CCE consists of 6 Resource Element Groups (REGs), each REG being 12 Resource Elements (REs) in one OFDM symbol.

In order to receive DCI, the UE needs to blind decode PDCCH candidates in the search space. The search space consists of a set of PDCCH candidates, where each candidate may occupy one or more CCEs. The number of CCEs used for PDCCH candidates is referred to as the aggregation level/degree of Aggregation (AL), and may be 1, 2, 4, 8 or 16 in NR.

As shown in fig. 2, a first embodiment of the communication method of the present application includes:

s110: splitting the first PDCCH to be transmitted into n second PDCCHs.

The embodiment is applied to a base station. The corresponding user equipment may be a reduced capability (RedCap) user equipment. The PDCCH transmission with a high aggregation degree consumes resources very, if a Control-resource set (CORESET) of a certain cell does not have enough resources, when the base station sends the PDCCH with a high aggregation degree to the RedCap device in the cell, the PDCCH is limited by the CORESET resources, and the PDCCH which should be sent cannot be sent, so that the PDCCH blocking problem is caused.

In this embodiment, the first PDCCH to be transmitted is split into n second PDCCHs. Where n >1, each second PDCCH has a lower degree of aggregation than the first PDCCH. Specifically, the first PDCCH may be split averagely to obtain n second PDCCHs; and the method can be randomly split to obtain n second PDCCHs. The second PDCCHs obtained by splitting can be mutually non-overlapped, and the aggregation degree of the first PDCCH is equal to the sum of the aggregation degrees of all the second PDCCHs obtained by splitting; or the second PDCCHs obtained by splitting can be partially overlapped, and the aggregation degree of the first PDCCHs is smaller than the sum of the aggregation degrees of all the second PDCCHs obtained by splitting.

S120: time-frequency resources are allocated for each second PDCCH.

Specifically, a time-frequency resource is allocated to each second PDCCH. In the related art, each search space is mapped to one CORESET, and one CORESET may correspond to a plurality of search spaces. The split n second PDCCHs may be allocated into at least one search space.

In an embodiment, at least two search spaces among the search spaces to which the n second PDCCHs belong are mapped to different control resource sets CORESETs, respectively, and the different CORESETs are bound together. For example, after splitting the first PDCCH, three second PDCCHs, such as a second PDCCH (1), a second PDCCH (2), and a second PDCCH (3), are obtained. Wherein the second PDCCH (1) and the second PDCCH (2) are allocated into a search space a, the second PDCCH (3) is allocated into a search space b, wherein the search space a is mapped into CORESET1, the search space b is mapped into CORESET2, and the CORESET1 and the CORESET2 are bound together.

In an embodiment, at least two of the different CORESETs of the binding are located in different time units, which may be one or more slots, symbols, or subframes. For example, as shown in FIG. 3, where the bound CORESET1 is in time cell Slot N, CORESET2 is in time cell Slot N+1. The Downlink Control Information (DCI) is separately in CORESET1 and CORESET2, and the user equipment (UserEquipment, UE) may extract corresponding second PDCCHs from the bundled CORESET1 and CORESET2, respectively, so as to obtain the first PDCCH. The method described in this embodiment can reduce clogging of the RedCap device.

In another embodiment, at least two of the different CORESETs of the binding are located in the same time unit. For example, as shown in FIG. 4, where both CORESET1 and CORESET2 of the binding are located in time cell Slot N. The Downlink Control Information (DCI) is separated in CORESET1 and CORESET2, and the user equipment (UserEquipment, UE) may extract the corresponding second PDCCH from the bundled CORESET1 and CORESET2, thereby obtaining the first PDCCH. The embodiment can reduce the scheduling waiting time of CORESET in the same time unit, increase scheduling opportunities and further reduce blockage of the RedCAP equipment.

In another embodiment, the n split second PDCCHs are mapped into corresponding search spaces, at least one search space is an extended search space, and parameters of the extended search space include a monitoringSlotPeriodicityAndOffset field. Each extended search space maps to at least two different CORESETs. In a specific embodiment, for example, after splitting the first PDCCH, three second PDCCHs, such as a second PDCCH (1), a second PDCCH (2), and a second PDCCH (3), are obtained. Wherein the second PDCCH (1) and the second PDCCH (2) are allocated in the search space a, and the second PDCCH (3) is allocated in the search space b. Where search space a is an extended search space and this extended search space (search space a) maps to CORESET1 and CORESET2.

In an embodiment, at least two of the CORESETs to which the extended search space is mapped are located in different time units. For example, as shown in FIG. 5, where CORESET1 is located in time cell Slot N and CORESET2 is located in time cell Slot N+1. Different degrees of polymerization can be configured at different times within the same CORESET. For example, the aggregation degree al=1 is set at time1 of CORESET1 of time unit Slot N, and the aggregation degree al=2 is set at time2 of CORESET1 of time unit Slot N. The degree of aggregation al=2 is arranged at time3 of CORESET2 of time unit Slot n+1, and the degree of aggregation al=4 is arranged at time4 of CORESET2 of time unit Slot n+1. The present embodiment maps the search space of the RedCap device into CORESETs of different time units to extend time from 1 time unit to multiple time units. If the first PDCCH is split, three second PDCCHs are obtained, such as a second PDCCH (1), a second PDCCH (2) and a second PDCCH (3). Wherein the second PDCCH (1), the second PDCCH (2) and the second PDCCH (3) are allocated into a search space a, and the search space a is an extended search space, and the extended search space (search space a) is mapped to CORESET1 and CORESET2 such that Downlink Control Information (DCI) is separated in CORESET1 and CORESET2. The user equipment may extract the corresponding second PDCCH from CORESET1 and CORESET2, and further obtain the first PDCCH. Specifically, when the time unit Slot N monitors CORESET1, a transmission with a degree of aggregation al=2 may be configured, and when the time unit Slot n+1 monitors CORESET2, a transmission with a degree of aggregation al=4 may be configured, which is equivalent to a transmission with a degree of aggregation al=6 being configured. Therefore, less resources can be consumed on the premise of achieving performance.

In another embodiment, the occupied frequency bands of at least two of the plurality of CORESET to which the extended search space is mapped are different. These different bands may be non-overlapping with each other, however, for a RedCap UE the available bandwidth is smaller than for a conventional UE, in which case the bands of at least two occupied bands of different CORESETs may overlap partially, thereby ensuring that these CORESETs do not exceed the available bandwidth of the UE. For example, as shown in FIG. 6, where CORESET1 is located in time cell Slot N and CORESET2 is located in time cell Slot N+1. In this embodiment, the extended search space may be configured with two degrees of aggregation at different times within the same CORESET. For example, the aggregation degree al=1 is set at time1 of CORESET1 of time unit Slot N, and the aggregation degree al=2 is set at time2 of CORESET1 of time unit Slot N. The degree of aggregation al=2 is arranged at time3 of CORESET2 of time unit Slot n+1, and the degree of aggregation al=4 is arranged at time4 of CORESET2 of time unit Slot n+1. In this embodiment, the frequency band occupied by CORESET1 is different from the frequency band occupied by CORESET2, and the frequency band occupied by CORESET1 partially overlaps with the frequency band occupied by CORESET2, as shown in the square box in fig. 6. If the first PDCCH is split, three second PDCCHs are obtained, such as a second PDCCH (1), a second PDCCH (2) and a second PDCCH (3). Wherein the second PDCCH (1), the second PDCCH (2) and the second PDCCH (3) are allocated into a search space a, and the search space a is an extended search space, and the extended search space (search space a) is mapped to CORESET1 and CORESET2 such that Downlink Control Information (DCI) is separated in CORESET1 and CORESET2. The user equipment may extract the corresponding second PDCCH from CORESET1 and CORESET2, and further obtain the first PDCCH. Specifically, when the time unit Slot N monitors CORESET1, a transmission with a degree of aggregation al=2 may be configured, and when the time unit Slot n+1 monitors CORESET2, a transmission with a degree of aggregation al=4 may be configured, which is equivalent to a transmission with a degree of aggregation al=6 being configured. Therefore, less resources can be consumed on the premise of achieving performance.

In another embodiment, the n split second PDCCHs are allocated to the corresponding search space, and the time-frequency resources allocated by at least two second PDCCHs in the n second PDCCHs belong to different monitoring occasions of the same CORESET, as shown in fig. 7. For example, after the first PDCCH is split, three second PDCCHs, such as a second PDCCH (1), a second PDCCH (2), and a second PDCCH (3), are obtained. Wherein, the video resources allocated by the second PDCCH (1) and the second PDCCH (2) belong to CORESET1.CORESET1 is periodically configured, e.g., CORESET1 in time cell solt N is configured in one cycle and CORESET1 in time cell solt n+1 is configured in another cycle. Thus, when CORESET1 is monitored twice in succession in two consecutive monitoring cycles, a transmission with a degree of aggregation al=2 and a transmission with a degree of aggregation al=2 can be configured, which is equivalent to a transmission with a degree of aggregation al=4 being configured. Therefore, less resources can be consumed on the premise of achieving performance.

S130: and transmitting n second PDCCHs to the user equipment using the allocated time-frequency resources.

Specifically, n second PDCCHs are transmitted to the user equipment using the time-frequency resources allocated in any one of the embodiments of fig. 3, 4, 5, 6, and 7.

In another embodiment, the method further comprises transmitting CORESET binding configuration information to the user equipment before transmitting the n second PDCCHs to the user equipment. The binding configuration information is carried by a control resource eSetToAddModList and/or a control resource eSetToAddModList 2.

According to the communication method, the first PDCCH with high aggregation degree to be transmitted is split into the second PDCCHs with low aggregation degree, time-frequency resources are allocated for each second PDCCH, and the base station transmits the second PDCCH to the user equipment by utilizing the allocated time-frequency resources, so that the problems that the PDCCH with high aggregation degree is easy to cause blockage and the PDCCH with high aggregation degree consumes more resources in the prior art are solved.

As shown in fig. 8, a second embodiment of the communication method of the present application includes:

s210: blind decoding is performed on the plurality of search spaces to receive n second PDCCHs.

Specifically, the method of the embodiment is applied to a user equipment side, and the user equipment performs blind decoding on the plurality of search spaces, so as to receive the corresponding second PDCCH. Wherein n >1, and the aggregation degree of each second PDCCH is lower than that of the first PDCCH. Specifically, the second PDCCH is obtained by performing flat splitting on the first PDCCH.

In a specific embodiment, the ue further receives CORESET binding configuration information from the base station, and blindly decodes the plurality of search spaces according to the binding configuration information to receive n second PDCCHs.

Specifically, in an embodiment, at least two search spaces among the search spaces to which the n second PDCCHs belong are mapped to different control resource sets CORESETs respectively, and the different CORESETs are bound together. For example, after splitting the first PDCCH, three second PDCCHs, such as a second PDCCH (1), a second PDCCH (2), and a second PDCCH (3), are obtained. Wherein the second PDCCH (1) and the second PDCCH (2) are allocated into a search space a, the second PDCCH (3) is allocated into a search space b, wherein the search space a is mapped into CORESET1, the search space b is mapped into CORESET2, and the CORESET1 and the CORESET2 are bound together.

And the user equipment performs blind decoding from the search space of the CORESET according to the CORESET binding configuration information, and further receives n second PDCCHs.

In another embodiment, the n split second PDCCHs are allocated to corresponding search spaces, where at least one search space is an extended search space, and parameters of the extended search space include a monitoringSlotPeriodicityAndOffset field. Each extended search space maps to at least two different CORESETs. In a specific embodiment, for example, after splitting the first PDCCH, three second PDCCHs, such as a second PDCCH (1), a second PDCCH (2), and a second PDCCH (3), are obtained. Wherein the second PDCCH (1) and the second PDCCH (2) are allocated in the search space a, and the second PDCCH (3) is allocated in the search space b. Where search space a is an extended search space and this extended search space (search space a) maps to CORESET1 and CORESET2. The user equipment (UserEquipment, UE) may extract a corresponding second PDCCH from the bundled CORESET1 and CORESET2, thereby obtaining a first PDCCH.

In an embodiment, at least two of the CORESETs to which the extended search space is mapped are located in different time units. For example, as shown in FIG. 5, where CORESET1 is located in time cell Slot N and CORESET2 is located in time cell Slot N+1. Different degrees of polymerization can be configured at different times within the same CORESET. For example, the aggregation degree al=1 is set at time1 of CORESET1 of time unit Slot N, and the aggregation degree al=2 is set at time2 of CORESET1 of time unit Slot N. The degree of aggregation al=2 is arranged at time3 of CORESET2 of time unit Slot n+1, and the degree of aggregation al=4 is arranged at time4 of CORESET2 of time unit Slot n+1. The present embodiment maps the search space of the RedCap device into CORESETs of different time units to extend time from 1 time unit to multiple time units. If the first PDCCH is split, three second PDCCHs are obtained, such as a second PDCCH (1), a second PDCCH (2) and a second PDCCH (3). Wherein the second PDCCH (1), the second PDCCH (2) and the second PDCCH (3) are allocated into a search space a, and the search space a is an extended search space, and the extended search space (search space a) is mapped to CORESET1 and CORESET2 such that Downlink Control Information (DCI) is separated in CORESET1 and CORESET2. The user equipment may extract the corresponding second PDCCH from CORESET1 and CORESET2, and further obtain the first PDCCH. Specifically, in this way, when the time unit Slot N monitors CORESET1, a transmission with a degree of aggregation al=2 may be configured, and when the time unit Slot n+1 monitors CORESET2, a transmission with a degree of aggregation al=4 may be configured, which is equivalent to a transmission with a degree of aggregation al=6 being configured. Therefore, less resources can be consumed on the premise of achieving performance.

In another embodiment, the occupied frequency bands of at least two of the plurality of CORESET to which the extended search space is mapped are different. These different bands may be non-overlapping with each other, however, for a RedCap UE the available bandwidth is smaller than for a conventional UE, in which case the bands of at least two occupied bands of different CORESETs may overlap partially, thereby ensuring that these CORESETs do not exceed the available bandwidth of the UE. For example, as shown in FIG. 6, where CORESET1 is located in time cell Slot N and CORESET2 is located in time cell Slot N+1. In this embodiment, the extended search space may be configured with two degrees of aggregation at different times within the same CORESET. For example, the aggregation degree al=1 is set at time1 of CORESET1 of time unit Slot N, and the aggregation degree al=2 is set at time2 of CORESET1 of time unit Slot N. The degree of aggregation al=2 is arranged at time3 of CORESET2 of time unit Slot n+1, and the degree of aggregation al=4 is arranged at time4 of CORESET2 of time unit Slot n+1. In this embodiment, the frequency band occupied by CORESET1 is different from the frequency band occupied by CORESET2, and the frequency band occupied by CORESET1 partially overlaps with the frequency band occupied by CORESET2, as shown in the square box in fig. 6. If the first PDCCH is split, three second PDCCHs are obtained, such as a second PDCCH (1), a second PDCCH (2) and a second PDCCH (3). Wherein the second PDCCH (1), the second PDCCH (2) and the second PDCCH (3) are allocated into a search space a, and the search space a is an extended search space, and the extended search space (search space a) is mapped to CORESET1 and CORESET2 such that Downlink Control Information (DCI) is separated in CORESET1 and CORESET2. The user equipment may extract the corresponding second PDCCH from CORESET1 and CORESET2, and further obtain the first PDCCH. Specifically, in this way, when the time unit Slot N monitors CORESET1, a transmission with a degree of aggregation al=2 may be configured, and when the time unit Slot n+1 monitors CORESET2, a transmission with a degree of aggregation al=4 may be configured, which is equivalent to a transmission with a degree of aggregation al=6 being configured. Therefore, less resources can be consumed on the premise of achieving performance.

In another embodiment, the n split second PDCCHs are allocated to the corresponding search space, and the time-frequency resources allocated by at least two second PDCCHs in the n second PDCCHs belong to different monitoring occasions of the same CORESET, as shown in fig. 7. For example, after the first PDCCH is split, three second PDCCHs, such as a second PDCCH (1), a second PDCCH (2), and a second PDCCH (3), are obtained. Wherein, the video resources allocated by the second PDCCH (1) and the second PDCCH (2) belong to CORESET1.CORESET1 is periodically configured, e.g., CORESET1 in time cell solt N is configured in one cycle and CORESET1 in time cell solt n+1 is configured in another cycle. Thus, when CORESET1 is monitored twice in succession in two consecutive monitoring periods S, a transmission with a degree of aggregation al=2 and a transmission with a degree of aggregation al=2 can be configured, which is equivalent to a transmission with a degree of aggregation al=4 being configured. Therefore, less resources can be consumed on the premise of achieving performance.

The ue further receives CORESET binding configuration information from the base station, where the CORESET binding configuration information is, for example, as shown in any one of the embodiments in fig. 3-7, and blind decodes the plurality of search spaces according to the binding configuration information to receive n second PDCCHs.

S220: and combining the n second PDCCHs to obtain a first PDCCH.

Since the n second PDCCHs are obtained by splitting the first PDCCH, the user equipment combines the n second PDCCHs to obtain the first PDCCH after the n second PDCCHs are obtained by blind decoding. Further, since n second PDCCHs are obtained by splitting a first PDCCH, the aggregation degree of each of the second PDCCHs is lower than that of the first PDCCH.

According to the communication method, the user equipment obtains n second PDCCHs through blind decoding, and combines the n second PDCCHs to obtain the first PDCCH. Therefore, the problems that the PDCCH with high polymerization degree is easy to cause blockage and the PDCCH with high polymerization degree consumes more resources in the prior art are solved.

As shown in fig. 9, a first embodiment of the communication device of the present application includes: a processor 110 and a communication circuit 120.

The processor 110 controls the operation of the communication device, the processor 110 may also be referred to as a CPU (Central Processing Unit ). The processor 110 may be an integrated circuit chip with processing capabilities for signal sequences. Processor 110 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The processor 110 drives the communication circuit 120 to implement the method provided by the first embodiment of the communication method of the present application.

As shown in fig. 10, a second embodiment of the communication device of the present application includes: a processor 210 and a communication circuit 220.

The processor 210 controls the operation of the communication device, the processor 210 may also be referred to as a CPU (Central Processing Unit ). The processor 210 may be an integrated circuit chip with signal sequence processing capabilities. Processor 210 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The processor 210 drives the communication circuit 220 to implement the method provided by the second embodiment of the communication method of the present application.

As shown in fig. 11, an embodiment of the readable storage medium of the present application includes a memory 310, where the memory 310 stores instructions that when executed implement the method provided by any embodiment and possible combinations of the communication methods of the present application.

The Memory 310 may include a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a Flash Memory (Flash Memory), a hard disk, an optical disk, and the like.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may be physically included separately, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims

A communication method applied to a base station side, the method comprising:

splitting a first PDCCH to be transmitted into n second PDCCHs, wherein n is greater than 1, and the aggregation degree of each second PDCCH is lower than that of the first PDCCH;

time-frequency resources are allocated to each second PDCCH;

and transmitting n second PDCCHs to the user equipment by using the allocated time-frequency resources.
The method of claim 1, wherein the step of determining the position of the substrate comprises,

and in the search spaces to which the n second PDCCHs belong, at least two search spaces are respectively mapped to different control resource sets (CORESET), and the different CORESET are bound together.
The method of claim 2, wherein the step of determining the position of the substrate comprises,

at least two of the different CORESETs of the binding are located in different time units.
The method of claim 2, wherein the step of determining the position of the substrate comprises,

at least two of the different CORESETs of the binding are located in the same time unit.
The method of claim 2, wherein the transmitting n second PDCCHs to a user device using the allocated time-frequency resources further comprises:

and sending CORESET binding configuration information to the user equipment.
The method of claim 5, wherein the step of determining the position of the probe is performed,

the CORESET binding configuration information is carried by a controllable resourcesetteto addmodlist and/or a controllable resourcesetteto addmodlist 2.
The method of claim 1, wherein the step of determining the position of the substrate comprises,

at least one search space in the search spaces to which the n second PDCCHs belong is an extended search space, and each extended search space is mapped to at least two different CORESET.
The method of claim 7, wherein the step of determining the position of the probe is performed,

at least two of the CORESETs to which the extended search space is mapped are located in different time units.
The method of claim 7, wherein the step of determining the position of the probe is performed,

at least two of the plurality of CORESETs to which the extended search space is mapped occupy different frequency bands.
The method of claim 9, wherein the step of determining the position of the substrate comprises,

the frequency bands of the CORESET with different occupied frequency bands are partially overlapped.
The method of claim 7, wherein the step of determining the position of the probe is performed,

the parameters of the extended search space include a monitoringSlotPeriodicityAndOffset field.
The method of claim 1, wherein the step of determining the position of the substrate comprises,

the time-frequency resources allocated by at least two second PDCCHs in the n second PDCCHs belong to different monitoring occasions of the same CORESET.
The method according to any one of claims 1 to 12, wherein,

the user equipment is a reduced capability user equipment.
A communication method, which is applied to a user equipment side, the method comprising:

blind decoding the plurality of search spaces to receive n second PDCCHs, n >1;

and combining the n second PDCCHs to obtain a first PDCCH, wherein the aggregation degree of each second PDCCH is lower than that of the first PDCCH.
The method of claim 14, wherein the step of providing the first information comprises,

and in the search spaces to which the n second PDCCHs belong, at least two search spaces are respectively mapped to different control resource sets (CORESET), and the different CORESET are bound together.
The method of claim 15, wherein the step of determining the position of the probe is performed,

at least two of the different CORESETs of the binding are located in different time units.
The method of claim 15, wherein the step of determining the position of the probe is performed,

at least two of the different CORESETs of the binding are located in the same time unit.
The method of claim 15, wherein prior to blind decoding the plurality of search spaces to receive n second PDCCHs further comprises:

and receiving CORESET binding configuration information from the base station.
The method of claim 14, wherein the step of providing the first information comprises,

at least one search space in the search spaces to which the n second PDCCHs belong is an extended search space, and the extended search space is mapped to at least two different CORESET.
The method of claim 19, wherein the step of determining the position of the probe comprises,

at least two of the CORESETs to which the extended search space is mapped are located in different time units.
The method of claim 19, wherein the step of determining the position of the probe comprises,

at least two occupied frequency bands in the CORESET to which the extended search space is mapped are different.
The method of claim 21, wherein the step of determining the position of the probe is performed,

the frequency bands of the CORESET with different occupied frequency bands are partially overlapped.
The method of claim 14, wherein the step of providing the first information comprises,

the time-frequency resources allocated by at least two second PDCCHs in the n second PDCCHs belong to different monitoring occasions of the same CORESET.
The method according to any one of claims 14 to 23, wherein,

the user equipment is a reduced capability user equipment.
A communication device, comprising: the processor is connected with the communication circuit;

the processor is configured to execute instructions to implement the method of any of claims 1-13.
A communication device, comprising: the processor is connected with the communication circuit;

the processor is configured to execute instructions to implement the method of any of claims 14-24.
A readable storage medium storing instructions which, when executed, implement the method of any one of claims 1-24.