Pdcch monitoring method, device, system, storage medium and program product

Abstract

This disclosure proposes a PDCCH monitoring method, device, system, storage medium, and program product. The method includes: receiving system information sent by a network device, the system information being used to indicate monitoring parameters; and monitoring the PDCCH using the monitoring parameters indicated by the system information. In the above embodiments, the network device can re-indicate monitoring parameters for a terminal through system information, and then the terminal can monitor the PDCCH based on the re-indicated monitoring parameters, improving the flexibility of the monitoring parameters used by the terminal when monitoring the PDCCH, thereby ensuring the reliability of communication between the terminal and the network device.

Description

PDCCH monitoring methods, equipment, systems, storage media, and software products Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to methods, devices, systems, storage media, and program products for monitoring the Physical Downlink Control Channel (PDCCH). Background Technology

[0002] With the rapid development of mobile communication technology, monitoring parameters are pre-defined in the terminal by the communication protocol. The terminal then monitors the PDCCH based on the monitoring parameters defined by the communication protocol, and then receives downlink control information (DCI) based on the monitored PDCCH. Summary of the Invention

[0003] When a terminal monitors the PDCCH based on the monitoring parameters specified in the communication protocol, there are situations where the monitoring parameters are too restrictive. How to improve the flexibility of the terminal in using the monitoring parameters is an urgent problem to be solved.

[0004] This disclosure provides a PDCCH monitoring method, device, system, storage medium, and program product.

[0005] According to a first aspect of the embodiments of this disclosure, a PDCCH monitoring method is proposed, the method being executed by a terminal, the method comprising:

[0006] Receive system information sent by network devices, the system information being used to indicate monitoring parameters;

[0007] Use the monitoring parameters to monitor PDCCH.

[0008] According to a second aspect of the present disclosure, a PDCCH monitoring method is provided, the method being performed by a network device, the method comprising:

[0009] Send system information to the terminal, the system information being used to indicate monitoring parameters;

[0010] The monitoring parameters are used by the terminal to use and monitor the PDCCH.

[0011] According to a third aspect of the present disclosure, a communication device is provided for performing PDCCH monitoring as described in the first or second aspect.

[0012] According to a fourth aspect of the present disclosure, a communication device is provided, comprising:

[0013] The processing module is used to perform the PDCCH monitoring described in the first or second aspect.

[0014] According to a fifth aspect of the present disclosure, a terminal is provided, comprising: one or more processors; wherein the processors are configured to perform any of the methods described in the first aspect.

[0015] According to a sixth aspect of the present disclosure, a network device is provided, comprising: one or more processors; wherein the processors are configured to perform any of the methods described in the second aspect.

[0016] According to a seventh aspect of the present disclosure, a communication system is provided, comprising: a terminal and a network device, wherein the terminal is configured to implement PDCCH monitoring as described in the first aspect, and the network device is configured to perform the method as described in the second aspect.

[0017] According to an eighth aspect of the present disclosure, a storage medium is provided that stores instructions which, when executed on a communication device, cause the communication device to perform the method as described in any one of the first or second aspects.

[0018] In the above embodiments, the network device can re-indicate monitoring parameters to the terminal through system information, and then the terminal can monitor the PDCCH based on the re-indicated monitoring parameters, which improves the flexibility of the monitoring parameters used by the terminal when monitoring the PDCCH, thereby ensuring the reliability of communication between the terminal and the network device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings required for the description of the embodiments are introduced below. The following drawings are only some embodiments of this disclosure and do not impose specific limitations on the protection scope of this disclosure.

[0020] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0021] Figure 2A is an interactive schematic diagram of PDCCH monitoring according to an embodiment of the present disclosure;

[0022] Figure 2B is a schematic diagram illustrating PDCCH monitoring according to an embodiment of the present disclosure;

[0023] Figure 3 is a schematic flowchart of PDCCH monitoring according to an embodiment of the present disclosure;

[0024] Figure 4 is a schematic flowchart of PDCCH monitoring according to an embodiment of the present disclosure;

[0025] Figure 5A is a schematic diagram of the structure of the terminal proposed in an embodiment of this disclosure;

[0026] Figure 5B is a schematic diagram of the structure of the network device proposed in an embodiment of this disclosure;

[0027] Figure 6A is a schematic diagram of the structure of the communication device proposed in an embodiment of this disclosure;

[0028] Figure 6B is a schematic diagram of the chip structure proposed in an embodiment of this disclosure. Detailed Implementation

[0029] This disclosure provides a PDCCH monitoring, device, system, storage medium, and program product.

[0030] In a first aspect, embodiments of this disclosure propose a PDCCH monitoring method, which is executed by a terminal and includes:

[0031] Receive system information sent by network devices, the system information being used to indicate monitoring parameters;

[0032] Use the monitoring parameters to monitor PDCCH.

[0033] In the above embodiments, the network device can re-indicate monitoring parameters to the terminal through system information, and then the terminal can monitor the PDCCH based on the re-indicated monitoring parameters, which improves the flexibility of the monitoring parameters used by the terminal when monitoring the PDCCH, thereby ensuring the reliability of communication between the terminal and the network device.

[0034] In conjunction with some embodiments of the first aspect, in some embodiments, the system information includes parameter values, and the monitoring of the PDCCH using the monitoring parameters includes:

[0035] The PDCCH is monitored using a monitoring parameter indicated by the parameter value in a group.

[0036] In the above embodiments, selecting one monitoring parameter from a group reduces the number of times the terminal monitors the PDCCH compared to all monitoring parameters in a group, thus saving terminal power consumption.

[0037] In conjunction with some embodiments of the first aspect, in some embodiments, the system information includes a group identifier, and the monitoring of the PDCCH using the monitoring parameters includes:

[0038] The PDCCH is monitored using monitoring parameters in a group identified by the group identifier.

[0039] In the above embodiments, a group identifier is used to indicate one of the multiple groups, thereby improving the accuracy of indicating a group and thus improving the accuracy of monitoring PDCCH based on the monitoring parameters of a group.

[0040] In conjunction with some embodiments of the first aspect, in some embodiments, the monitoring parameter indicated by the system information is the aggregation level;

[0041] The step of monitoring PDCCH using the monitoring parameters includes: monitoring PDCCH using the aggregation level and the number of candidates corresponding to the aggregation level;

[0042] The aggregation level is used to indicate the amount of time-frequency resources occupied by the DCI carried by the PDCCH, and the candidate number is used to indicate the number of monitoring areas. The monitoring area refers to the area where the terminal monitors the DCI carried by the PDCCH, and the monitoring area includes the amount of time-frequency resources indicated by the aggregation level.

[0043] In the above embodiments, the terminal determines the aggregation level and number of candidates used when monitoring the PDCCH by using the aggregation level indicated by the network device, thereby improving the accuracy of the aggregation level and number of candidates used by the terminal.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, the aggregation level is the largest or smallest aggregation level in the group.

[0045] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is the highest aggregation level in a group, and the number of candidates is the same as the number of candidates corresponding to the highest aggregation level, the indicated highest aggregation level can ensure that the PDCCH can be successfully monitored and the received DCI demodulated even when channel conditions deteriorate subsequently. Furthermore, this scheme is applicable when air interface channel resources are sufficient; the terminal only needs to perform blind detection according to the highest aggregation level, reducing the number of blind detections. Essentially, this method trades increased air interface resource overhead for terminal energy saving.

[0046] If the aggregation level indicated by the system information received by the terminal is the smallest aggregation level in a group, and the number of candidates is the number of candidates corresponding to the smallest aggregation level, the indicated minimum aggregation level can be guaranteed to be used when the channel conditions are good, thus ensuring the reliability of receiving DCI through the monitored PDCCH.

[0047] In addition, in the above embodiments, the aggregation level used by the terminal is any one of the largest aggregation level, the smallest aggregation level, or the default aggregation level in a group, which improves the flexibility of the aggregation level used by the terminal.

[0048] In conjunction with some embodiments of the first aspect, in some embodiments, the system information is a Master Information Block (MIB);

[0049] The monitoring of PDCCH includes:

[0050] Monitor PDCCH in the community-level common search space (CSS).

[0051] In the above embodiments, when the system information is MIB, the terminal can monitor the PDCCH in the cell-level CSS, thus expanding the search space for the terminal to monitor the PDCCH.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, the system information is System Information Block 1 (SIB1);

[0053] The monitoring of PDCCH includes: monitoring PDCCH in other CSS;

[0054] The other cell-level CSSs are cell-level CSSs other than those used for monitoring DCI, which is used to schedule SIB1.

[0055] In the above embodiments, when the system information is SIB1, the terminal can monitor other cell-level CSSs besides the CSS of the DCI, thereby improving the accuracy of the search space for monitoring the PDCCH.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the terminal is in a connected state, an idle state, or an inactive state.

[0057] Secondly, embodiments of this disclosure provide a PDCCH monitoring method, which is performed by a network device and includes:

[0058] Send system information to the terminal, the system information being used to indicate monitoring parameters;

[0059] The monitoring parameters are used by the terminal to use and monitor the PDCCH.

[0060] In conjunction with some embodiments of the second aspect, in some embodiments, the system information includes parameter values ​​that indicate a monitoring parameter in a group.

[0061] In conjunction with some embodiments of the second aspect, in some embodiments, the system information includes a group identifier.

[0062] In conjunction with some embodiments of the second aspect, in some embodiments, the monitoring parameter is an aggregate level;

[0063] The aggregation level is used to indicate the amount of time-frequency resources occupied by the downlink control information (DCI) carried by the PDCCH. The number of candidates corresponding to the aggregation level is used to indicate the number of monitoring areas. The monitoring area refers to the area in which the terminal monitors the DCI carried by the PDCCH. The monitoring area includes the number of time-frequency resources indicated by the aggregation level.

[0064] In conjunction with some embodiments of the second aspect, in some embodiments, the aggregation level is the largest or smallest aggregation level in the group.

[0065] In conjunction with some embodiments of the second aspect, in some embodiments, the system information is a MIB;

[0066] The PDCCH mentioned is the PDCCH in the community-level public search space (CSS).

[0067] In conjunction with some embodiments of the second aspect, in some embodiments, the system information is SIB1;

[0068] The PDCCH refers to the PDCCH in other cell-level CSS.

[0069] The other cell-level CSSs are cell-level CSSs other than those used for monitoring DCI, which is used to schedule SIB1.

[0070] Thirdly, embodiments of this disclosure provide a communication device for performing PDCCH monitoring as described in the first or second aspect.

[0071] Fourthly, embodiments of this disclosure provide a communication device, which includes at least one of a transceiver module and a processing module; wherein the communication device is used to execute an optional implementation of the first aspect or the second aspect.

[0072] Fifthly, embodiments of this disclosure provide a terminal, including: one or more processors; wherein the processors are configured to perform the method described in any one of the first aspects.

[0073] In a sixth aspect, embodiments of this disclosure provide a network device, including: one or more processors; wherein the processors are configured to perform the method described in any one of the second aspects.

[0074] In a seventh aspect, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of the first or second aspects.

[0075] Eighthly, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method as described in either the first or second aspect.

[0076] In a ninth aspect, embodiments of this disclosure provide a computer program that, when run on a communication device, causes the communication device to perform the method described in either the first or second aspect.

[0077] In a tenth aspect, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the methods described in either the first or second aspect.

[0078] It is understood that the aforementioned communication equipment, communication system, storage medium, program product, etc., are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0079] This disclosure provides a PDCCH monitoring, device, system, storage medium, and program product. In some embodiments, terms such as PDCCH monitoring and determination method, capability indication method, and model indication method can be used interchangeably.

[0080] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments. In all embodiments of this disclosure, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0081] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0082] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0083] In the embodiments disclosed herein, "multiple" refers to two or more.

[0084] In some embodiments, the terms “at least one of A or B, at least one of A and B”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0085] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of whether there is a branch B); in some embodiments, B (execute B regardless of whether there is a branch A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, both A and B are executed. The same applies when there are more branches such as A, B, C, etc.

[0086] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execute A regardless of whether a branch B exists); in some embodiments, B (execute B regardless of whether a branch A exists); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, and C.

[0087] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "symbol," the ordinal number preceding "symbol" in "first symbol" and "second symbol" does not restrict the position or order of the "symbols." "First" and "second" do not restrict whether the "symbols" they modify are in the same message, nor do they restrict the order of "first symbol" and "second symbol." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, objects modified by different prefixes can be the same or different. For example, if the descriptive object is a "device," then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the descriptive object is "information," then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0088] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0089] In some embodiments, terms such as “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “when…”, “if…”, etc. can be used interchangeably. These descriptions all refer to the device making a corresponding action under certain objective circumstances. They do not necessarily limit the time, nor do they require the device to make a judgment action when implementing it, nor do they mean that there must be other limitations.

[0090] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0091] In some embodiments, devices, etc., may be interpreted as physical or virtual, and their names are not limited to those described in the embodiments. Terms such as “device,” “equipment,” “circuit,” “network element,” “network function,” “network device,” “function,” “node,” “unit,” “section,” “system,” “network,” “chip,” “chip system,” “entity,” and “subject” are interchangeable.

[0092] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0093] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "serving cell," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0094] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0095] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, and uplink link, downlink, etc., can be replaced with sidelink link.

[0096] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0097] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0098] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0099] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0100] Figure 1 is a schematic diagram of the architecture of a sensory system according to an embodiment of the present disclosure.

[0101] As shown in Figure 1, the communication system 100 includes a terminal 101, an access network device 102, and a core network device 103.

[0102] In some embodiments, terminal 101 includes, for example, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home, but is not limited thereto.

[0103] In some embodiments, the access network device 102 may be a node or device that connects a terminal to a wireless network. The access network device may include at least one of the following in a 5G communication system: an evolved Node B (eNB), a next-generation eNB (ng-eNB), a next-generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open RAN, a cloud RAN, a base station in other communication systems, and an access node in a Wi-Fi system, but is not limited thereto.

[0104] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0105] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0106] In some embodiments, the core network device 103 may be a single device, including a first network element 1031, a second network element 1032, etc., or it may be multiple devices or a group of devices, each including all or part of the first network element 1031, the second network element 1032, etc. Network elements may be virtual or physical. The core network may include, for example, at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and 6G Core Network (6GCN).

[0107] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0108] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1 are illustrative. The communication system may include all or some of the main bodies in FIG1, or may include other main bodies outside of FIG1. ​​The number and form of each main body are arbitrary. Each main body may be physical or virtual. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0109] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing other PDCCH monitoring, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0110] In some embodiments, the terminal may monitor the PDCCH sent by the network device, wherein the PDCCH includes DCI, which can also be understood as the terminal monitoring the PDCCH to receive the DCI carried by the PDCCH.

[0111] It should be noted that terminal monitoring of the PDCCH can be referred to as PDCCH blind detection. The energy consumption of PDCCH blind detection is an important registered component of terminal energy consumption. In 5G communication systems, for terminals entering the RRC connected state, network devices can configure one or more search spaces (SS) for the terminal. For each search space, the following parameters can be configured:

[0112] (1) Search Space ID. The Search Space ID is used to identify the search space.

[0113] (2) Types of search spaces. The search space types include the common search space (CSS) and the UE-specific search space (USS). Optionally, if the search space type is CSS, it can only be used to transmit the common DCI (used to indicate some control information) or the default fallback format scheduling DCI (used to schedule PDSCH or PUSCH). If the search space type is USS, it can be used to transmit the default fallback format scheduling DCI or the non-fallback format scheduling DCI (the non-fallback format scheduling DCI is also used to schedule the Physical Downlink Shared Channel (PDSCH) or the Physical Uplink Shared Channel (PUSCH), but some information fields in the non-fallback format scheduling DCI are specific to the terminal, such as the Precoding Matrix Indicator (PMI) and Layer parameters.

[0114] (3) One or more DCI formats that need to be blindly checked in the search space.

[0115] (4) Possible aggregation levels (AL) in the search space that require blind detection. The aggregation level is used to represent the amount of time-frequency resources occupied by a DCI, such as AL=2, AL=4, AL=8, AL=16, etc.

[0116] (5) The number of candidates N corresponding to each AL in the search space. That is, for the AL corresponding to this number of candidates, the terminal needs to perform DCI blind detection of the AL on at most N different time-frequency resources.

[0117] (6) For a specific DCI format in the search space, configure the number of ALs and candidates that need to be blindly checked separately for that DCI format.

[0118] In some embodiments, the signaling for configuring the network device with the AL and its corresponding number of candidates is as follows:

[0119] Optionally, if the terminal needs to blindly detect more DCI formats in the search space, and the number of ALs and candidates for the DCIs increases, then the energy consumption of the terminal for PDCCH monitoring in that search space will be greater. Without loss of generality, assume that K DCI formats are configured in the search space, and the Kth DCI format is configured with M... k There are ALs, each AL is configured with Given 1 candidate time-frequency resource location, the maximum number of blind checks for PDCCH in a search space is (assuming each DCI requires only 1 RNTI attempt):

[0120] In 5G communication systems, for terminals that are idle / inactive during RRC (Registered Radio Control), it is necessary to monitor scheduling system information (including SIB1 and other System Information (SI)), paging, paging early indication (PEI), and scheduling instructions during the Random Access Channel (RACH) reception process. Therefore, blind PDCCH detection needs to be performed in the cell CSS (Cellular Cell CSS). The relevant cell CSS in 5G NR is described below:

[0121] 1. Type0-PDCCH CSS, used for transmission scheduling SIB1 PDCCH, is only configured on the primary cell of the Master Cell Group (MCG).

[0122] 2. Type 0A-PDCCH CSS, used for transmitting and scheduling PDCCHs of other SIs, is only configured on the primary cell of the MCG.

[0123] 3. Type 1-PDCCH CSS is used to schedule the PDCCH of Msg2 / Msg4 / MsgB during random access in the transmission scheduling process. This CSS is configured on the primary cell.

[0124] 4. Type2-PDCCH CSS, used for transmitting scheduling paging PDSCH PDCCH, is only configured on the primary cell of the MCG.

[0125] 5. Type2A-PDCCH CSS is used for advance indication of transmission scheduling paging (PEI). PEI is DCI 2-7 and is only configured on the primary cell of the MCG.

[0126] In some embodiments, the AL and candidate number for PDCCH blind detection in the search space of Type 0 / 0A / 2 / 2A in the communication protocol are shown in Table 1:

[0127] Table 1

[0128] One reason why the aggregation level and candidate number are defined directly in the communication protocol instead of using network device configuration is that when the terminal first needs to monitor and schedule the Type 0 CSS of SIB1, it has not yet obtained information from the network device about the AL and candidate number in the CSS, so it cannot receive the network device configuration and instead defines it directly in the protocol.

[0129] In RRC idle state, the terminal needs to first listen to the synchronization signal and MIB information to obtain the time-frequency location information of the Type 0 CSS. The DCI in the Type 0 CSS schedules SIB1, and SIB1 indicates the frequency domain location of the Type 0A-PDCCH CSS, Type 1-PDCCH CSS, Type 2-PDCCH CSS, and Type 2A-PDCCH CSS. The UE obtains the configuration information of the CSSs of the other types by receiving SIB1, and then can receive the corresponding DCI and further receive the corresponding PDSCH from these CSSs.

[0130] In some embodiments, configuring or defining multiple ALs for a search space is to facilitate adaptive link scheduling. For example, when channel conditions are good, the code rate of the DCI can be higher, thus occupying less time-frequency resources, and a lower AL can be used; when channel conditions are poor, the code rate of the DCI can be lower, thus occupying more time-frequency resources, and a higher AL can be used. Configuring multiple different time-frequency resource carrying locations (i.e., candidate number > 1) for one AL of the DCI in the search space is based on the following two purposes:

[0131] The first purpose is to facilitate inter-UE multiplexing in time and frequency resources.

[0132] While these search spaces can be configured independently, this doesn't mean their time-frequency resources won't overlap. In many cases, to avoid resource fragmentation, base stations may configure overlapping time-frequency resources for CSS and UE USS, or multiple UE USS may have overlapping time-frequency resource configurations. To minimize the probability of conflicts between different UE DCIs on overlapping time-frequency resources, an AL can have multiple different time-frequency resource carrying locations. This allows the base station to flexibly adjust the time-frequency resource locations of multiple UE DCIs, minimizing the probability of conflicts between different UEs.

[0133] The second purpose is to facilitate intra-UE multiplexing in time and frequency resources.

[0134] In a search space, a UE may need to blindly detect multiple DCI formats. Different DCI formats may have the same or different bit sizes, and the ALs they use may be the same or different. If it is necessary to distinguish these two DCIs in terms of time and frequency resources, then an AL also needs to have multiple different time and frequency positions.

[0135] Figure 2A is an interactive schematic diagram of PDCCH monitoring according to an embodiment of the present disclosure. As shown in Figure 2A, the embodiments of the present disclosure relate to PDCCH monitoring, and the above method includes:

[0136] Step S2101: The network device sends system information to the terminal.

[0137] In some embodiments, the terminal receives system information sent by the network device.

[0138] The system information is used to indicate monitoring parameters. These monitoring parameters are used by the terminal to monitor the PDCCH. In some embodiments, the names of the monitoring parameters in this disclosure are not limited, and they may be, for example, blind detection parameters, parameters for monitoring the PDCCH, etc.

[0139] In some embodiments, the monitoring parameter includes an aggregation level and a candidate number. There is a one-to-one correspondence between the aggregation level and the candidate number. For example, aggregation level 16 corresponds to candidate number 1, aggregation level 8 corresponds to candidate number 4, and aggregation level 16 corresponds to candidate number 2. The aggregation level indicates the amount of time-frequency resources occupied by a DCI, and the candidate number indicates the number of monitoring areas, where the monitoring area refers to the area where the terminal monitors the DCI carried by the PDCCH.

[0140] In this embodiment of the disclosure, after receiving system information sent by the network device, the terminal can determine the indicated monitoring parameters based on the system information. For example, the terminal can determine the indicated aggregation level and the number of candidates based on the system information.

[0141] In some embodiments, the monitoring parameters indicated by the system information are a portion of the monitoring parameters specified by the communication protocol between the terminal and the network device. The communication protocol between the terminal and the network device specifies at least one group, and each group includes at least one monitoring parameter. Optionally, in this embodiment, the at least one group specified by the communication protocol between the terminal and the network device is included in a parameter set. This embodiment does not limit the name of the parameter set; it may be, for example, a parameter combination, a monitoring parameter combination, or a monitoring parameter set. Optionally, this embodiment does not limit the name of the group; it may be, for example, a parameter group or a monitoring parameter group. Alternatively, a group can also be understood as a set of monitoring parameters; that is, a set of monitoring parameters can be a group, and each set of monitoring parameters includes at least one monitoring parameter. For example, a parameter set includes at least one set of monitoring parameters, and each set of monitoring parameters includes at least one monitoring parameter.

[0142] The parameter set is illustrated below with examples. For instance, the communication protocol between the terminal and the network device specifies only one group, and each group includes multiple monitoring parameters. Taking the aggregation level (AL) and the corresponding candidate number as an example, one group might include (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). Alternatively, one group might include (AL / candidate number) = (4 / 8), (AL / candidate number) = (8 / 4), and (AL / candidate number) = (16 / 2). Other forms are also possible, and this embodiment is not limited to these.

[0143] For example, the terminal and network device define multiple groups through a communication protocol. Each group includes multiple monitoring parameters. Taking the aggregation level (AL) and the corresponding candidate number for each aggregation level as an example, the following explanation is provided:

[0144] The first group includes:

[0145] (AL / candidate number) = (4 / 4), and

[0146] (AL / candidate number) = (8 / 2), and

[0147] (AL / candidate number)=(16 / 1).

[0148] The second group includes:

[0149] (AL / candidate number)=(4 / 8).

[0150] The third group includes:

[0151] (AL / candidate number)=(16 / 2).

[0152] Other forms are also possible, and this disclosure does not limit the specific embodiments.

[0153] In some embodiments, the parameter set is defined by a communication protocol. Alternatively, the parameter set is predefined, and the terminal subsequently uses the monitoring parameters included in the parameter set to monitor the PDCCH. Optionally, if the terminal and the network device define a group through a communication protocol, the terminal will by default use all monitoring parameters in that group defined by the communication protocol to monitor the PDCCH before receiving system information. Optionally, if the terminal and the network device define multiple groups through a communication protocol, the terminal will by default use all monitoring parameters in one of the multiple groups included in the parameter set to monitor the PDCCH before receiving system information.

[0154] It should be noted that the embodiments disclosed herein are illustrated using a parameter set as an example. In another embodiment, the communication protocol may specify that there is only one group between the terminal and the network device, similar to the parameter set in the above embodiments which includes only one group. Alternatively, the communication protocol may specify that there are multiple groups between the terminal and the network device, similar to the parameter set in the above embodiments which includes multiple groups.

[0155] Optionally, the terminal is in a connected state, an idle state, or a deactivated state. For example, if the terminal is in a connected state, step S2101 in this embodiment of the present disclosure is executed. Or, if the terminal is in an idle state, step S2101 in this embodiment of the present disclosure is executed. Or, if the terminal is in a deactivated state, step S2101 in this embodiment of the present disclosure is executed.

[0156] In some embodiments, the network device may send system information under certain conditions. Optionally, the network device sends system information to the terminal when the air interface traffic volume is less than a preset traffic volume. The system information indicates a monitoring parameter used to monitor the PDCCH a fewer number of times than the default monitoring parameter is used to monitor the PDCCH.

[0157] Step S2102: The terminal uses monitoring parameters to monitor the PDCCH.

[0158] In some embodiments, the terminal and the network device agree on one or more groups through a communication protocol. Because the number of groups agreed upon between the terminal and the network device varies, the monitoring parameters indicated by the system information used by the terminal will also differ. This will be explained in detail below. Alternatively, the terminal and the network device may agree on a parameter set through a communication protocol. The system information sent by the network device can indicate a portion of the monitoring parameters in the parameter set. Because the parameter set includes different groups, the monitoring parameters indicated by the system information used by the terminal will also differ. This will also be explained in detail below.

[0159] In some embodiments, the terminal and the network device agree on a group via a communication protocol. A group includes multiple monitoring parameters, and the monitoring parameter indicated by the system information is one of the monitoring parameters in that group. Optionally, the system information includes parameter values, and the terminal uses a monitoring parameter indicated by the parameter value in the group to monitor the PDCCH. Since the monitoring parameter indicated by the system information may include an aggregation level, or it may include an aggregation level and the number of candidates corresponding to that aggregation level, different scenarios are described below.

[0160] Optionally, if the monitoring parameter is an aggregation level, the terminal can monitor the PDCCH using the aggregation level and the corresponding number of candidates. In some embodiments, the parameter value is represented by a certain number of bits. The terminal determines the indicated aggregation level based on this certain number of bits and can also determine the corresponding number of candidates based on the indicated aggregation level. Here, the certain number of bits is greater than or equal to 1. For example, if the system information includes 1 bit, and 1 bit is 0, the terminal can select the largest aggregation level in a group and select the candidate number corresponding to the largest aggregation level. If 1 bit is 1, the terminal can select the smallest aggregation level in a group and select the candidate number corresponding to the smallest aggregation level. As another example, if the system information includes 2 bits, and both bits are 00, the terminal can select the largest aggregation level in a group and select the candidate number corresponding to the largest aggregation level. If both bits are 01, the terminal can select the smallest aggregation level in a group and select the candidate number corresponding to the smallest aggregation level. If both bits are 10, the terminal selects the monitoring parameters included in the default parameter set.

[0161] Optionally, the aggregation level indicated by the system information is either the highest or lowest aggregation level in a group. Where the aggregation level indicated by the system information is the highest aggregation level in a group, the terminal uses the highest aggregation level and the corresponding number of candidates to monitor the PDCCH. For example, a group agreed upon by the terminal and network device through a communication protocol includes (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). The highest aggregation level indicated by the system information is 16, and the number of candidates corresponding to 16 is 1. Therefore, the terminal uses (AL / candidate number) = (16 / 1) to monitor the PDCCH.

[0162] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is the highest aggregation level in a group, and the number of candidates is the same as the number of candidates corresponding to the highest aggregation level, the indicated highest aggregation level can ensure that the PDCCH can be successfully monitored and the received DCI demodulated even when channel conditions deteriorate subsequently. Optionally, this scheme is applicable when air interface channel resources are sufficient, and the terminal only needs to perform blind detection according to the highest aggregation level, reducing the number of blind detections. This method essentially trades increased air interface resource overhead for terminal energy saving.

[0163] Alternatively, the aggregation level indicated by the system information is the lowest aggregation level in a group. Correspondingly, the terminal uses the lowest aggregation level and the number of candidates corresponding to the lowest aggregation level to monitor the PDCCH. For example, a group agreed upon by the terminal and network device through the communication protocol includes (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). The highest aggregation level indicated by the system information is 4, so the number of candidates corresponding to 4 is 4. Therefore, the terminal uses (AL / candidate number) = (4 / 4) to monitor the PDCCH.

[0164] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is the smallest aggregation level in a group, and the number of candidates is the number of candidates corresponding to the smallest aggregation level, the indicated smallest aggregation level can be guaranteed to be used when the channel conditions are good, thus ensuring the reliability of receiving DCI through the monitored PDCCH.

[0165] Alternatively, the aggregation level indicated by the system information may be neither the highest nor the lowest aggregation level, but rather an aggregation level other than the highest and lowest aggregation levels. Correspondingly, the terminal uses a number of candidates corresponding to an aggregation level that is neither the highest nor the lowest, and also neither the highest nor the lowest aggregation level, to monitor the PDCCH. For example, a group agreed upon by the terminal and network device through a communication protocol includes (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). If the aggregation level indicated by the system information is 8, then the number of candidates corresponding to 8 is 2. Therefore, the terminal uses (AL / candidate number) = (8 / 2) to monitor the PDCCH.

[0166] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is neither the largest nor the smallest aggregation level in a group, the network device can indicate the aggregation level even when the channel conditions are not determined, thus preventing the system information from being unable to indicate the aggregation level.

[0167] It should be noted that this embodiment of the disclosure uses the example of system information indicating one monitoring parameter in a group for illustration. In another embodiment, the system information may also indicate some monitoring parameters in a group, that is, the number of monitoring parameters indicated by the system information is not one, but multiple. For example, the aggregation level indicated by the system information may be the first two largest aggregation levels in a group, or the first two smallest aggregation levels in a group, or other cases, which are not limited in this embodiment of the disclosure.

[0168] In this embodiment of the disclosure, before receiving system information, the terminal uses all the monitoring parameters in a group agreed upon by the communication protocol between the terminal and the network device by default. After receiving system information, it uses some of the monitoring parameters in the group. When the terminal uses all the monitoring parameters in the group, the maximum number of times it monitors the PDCCH will be higher than the maximum number of times it monitors the PDCCH using the monitoring parameters indicated by the system information. Therefore, when the terminal monitors the PDCCH using the monitoring parameters indicated by the system information, it will save terminal power consumption.

[0169] For example, as shown in Figure 2B, assuming that a group defined by the communication protocol includes (AL / candidate number) = (16 / 1), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (4 / 4), the left side shows that when the terminal uses this group to monitor the PDCCH, the number of monitoring times is 1+2+4=7. During data transmission and reception, the network device can instruct the terminal to use (AL / candidate number) = (16 / 1) to monitor the PDCCH based on the real-time situation through system information. For example, the right side shows that the number of monitoring times using (AL / candidate number) = (16 / 1) to monitor the PDCCH is 1. Therefore, the terminal can reduce 7-1=6 monitoring times, which can save the terminal's energy consumption in monitoring the PDCCH.

[0170] In some embodiments, the monitoring parameters indicated by the system information are aggregation level and candidate quantity, with a one-to-one correspondence between the aggregation level and the candidate quantity; the PDCCH is monitored using the aggregation level and candidate quantity indicated by the system information. In some embodiments, the parameter values ​​are represented by a certain number of bits. The terminal determines the indicated aggregation level based on the certain number of bits included in the system information, and can also determine the corresponding candidate quantity based on the indicated aggregation level. The certain number of bits is greater than or equal to 1. For example, if the system information includes 1 bit, and 1 bit is 0, the terminal can select the largest aggregation level and the corresponding candidate quantity in a group. If 1 bit is 1, the terminal can select the smallest aggregation level and the corresponding candidate quantity in a group. As another example, if the system information includes 2 bits, and both bits are 00, the terminal can select the largest aggregation level and the corresponding candidate quantity in a group. If both bits are 01, the terminal can select the smallest aggregation level and the corresponding candidate quantity in a group. If both bits are 10, the terminal selects the monitoring parameters included in the default parameter set.

[0171] Optionally, the aggregation level indicated by the system information is the highest aggregation level in a group, and the number of candidates is the number of candidates corresponding to the highest aggregation level. For example, a group agreed upon by the terminal and network device through the communication protocol includes (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). The highest aggregation level indicated by the system information is 16, so the number of candidates is 1, which corresponds to aggregation level 16. Therefore, the terminal uses (AL / candidate number) = (16 / 1) to monitor the PDCCH.

[0172] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is the highest aggregation level in a group, and the number of candidates is the same as the number of candidates corresponding to the highest aggregation level, the indicated highest aggregation level can ensure that the PDCCH can be successfully monitored and the received DCI demodulated even when channel conditions deteriorate subsequently. Optionally, this scheme is applicable when air interface channel resources are sufficient, and the terminal only needs to perform blind detection according to the highest aggregation level, reducing the number of blind detections. This method essentially trades increased air interface resource overhead for terminal energy saving.

[0173] Alternatively, the aggregation level indicated by the system information is the smallest aggregation level in a group, and the number of candidates is the number of candidates corresponding to the smallest aggregation level; for example, a group agreed upon by the terminal and network device through the communication protocol includes (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). The largest aggregation level indicated by the system information is 4, and the number of candidates is the number of candidates corresponding to aggregation level 4, which is 4. Therefore, the terminal uses (AL / candidate number) = (4 / 4) to monitor the PDCCH.

[0174] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is the smallest aggregation level in a group, and the number of candidates is the number of candidates corresponding to the smallest aggregation level, the indicated smallest aggregation level can be guaranteed to be used when the channel conditions are good, thus ensuring the reliability of receiving DCI through the monitored PDCCH.

[0175] Alternatively, the aggregation level indicated by the system information is neither the largest nor the smallest aggregation level in a group, and the number of candidates is the number of candidates corresponding to the aggregation level that is neither the largest nor the smallest. For example, a group agreed upon by the terminal and network device through the communication protocol includes (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). If the aggregation level indicated by the system information is 8, then the number of candidates is 2, which corresponds to aggregation level 8. Therefore, the terminal uses (AL / candidate number) = (8 / 2) to monitor the PDCCH.

[0176] In the above embodiments, if the aggregation level indicated by the system information received by the terminal is neither the largest nor the smallest aggregation level in a group, the network device can indicate the aggregation level even when the channel conditions are not determined, thus preventing the system information from being unable to indicate the aggregation level.

[0177] It should be noted that this embodiment of the disclosure uses the system information indicating one monitoring parameter in a group as an example for illustration. In another embodiment, the system information may also indicate some monitoring parameters in a group, that is, the number of monitoring parameters indicated by the system information is not one, but multiple. For example, the aggregation level indicated by the system information may be the two largest aggregation levels in a group and the number of candidates corresponding to the two largest aggregation levels, or it may be the two smallest aggregation levels in a group and the number of candidates corresponding to the two smallest aggregation levels, or it may be other cases, which are not limited in this embodiment of the disclosure.

[0178] It should be noted that the embodiments disclosed herein are illustrated using an example where the parameter set includes one group. However, in another embodiment, there is a case where the parameter set includes multiple groups, which will be described below.

[0179] In some embodiments, the terminal and network device agree on multiple groups through a communication protocol. Each group includes multiple monitoring parameters, and the monitoring parameters indicated by the system information are all the monitoring parameters included in one of the multiple groups. Optionally, the system information includes a group identifier, and the terminal uses the monitoring parameters in a group identified by the group identifier to monitor the PDCCH. In embodiments of this disclosure, the terminal can determine a group indicated by the received system information based on the system information, and then monitor the PDCCH based on the monitoring parameters included in this group.

[0180] Optionally, the group identifier is indicated by a certain number of bits. For example, multiple groups agreed upon by the terminal and network device through the communication protocol include two groups, namely the first group and the second group. The index indication information is 1 bit. For example, if the 1 bit is 0, it indicates the first group, and if the 1 bit is 1, it indicates the second group.

[0181] Optionally, among the multiple groups included in the parameter set, there is a predefined group. This predefined group is the group used by the terminal before receiving system information, and the terminal will switch to using a group indicated by the system information after receiving system information.

[0182] In general, among the multiple groups agreed upon by the communication protocol between the terminal and the network device, the predefined group is the one that monitors the PDCCH the most times. However, when the network device sends system information, it will indicate the group that monitors the PDCCH less frequently, in order to reduce the number of times the terminal monitors the PDCCH and thus reduce terminal power consumption. For example, the multiple groups agreed upon by the communication protocol between the terminal and the network device include two groups. The first group has (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1), and the second group has (AL / candidate number) = (16 / 2). The terminal defaults to using the first group, but the system information indicates the second group. The terminal monitors the PDCCH 4+2+1=7 times using the first group, and only 2 times using the second group. Therefore, the terminal can reduce the number of times by 7-2=5, saving terminal power consumption.

[0183] In other cases, the predefined group among multiple groups agreed upon by the communication protocol between the terminal and network device is the group with the fewest PDCCH monitoring times. When the network device sends system information, it will indicate the group with the most PDCCH monitoring times through the system information. In this case, the aggregation level of the group with the fewest PDCCH monitoring times will be higher, while the aggregation level of the group with the most PDCCH monitoring times will be lower. Therefore, to accommodate a large number of terminals within the cell, the group with the most PDCCH monitoring times can be used, improving the flexibility of terminal PDCCH monitoring and reducing interference between different terminals. For example, the first group has (AL / candidate number) = (4 / 4) and (AL / candidate number) = (8 / 2), and the second group has (AL / candidate number) = (16 / 2). The terminal defaults to using the second group, where AL is 16, while the system information indicates the first group, with aggregation levels only including 4 and 8, which can reduce interference between multiple terminals and improve the flexibility of terminal PDCCH monitoring.

[0184] In some embodiments, the predefined group in this disclosure may also be called the default group, or a group with other names, and this disclosure does not limit this.

[0185] It should be noted that the system information in this embodiment includes various types. For different types of system information, the terminal has different monitoring situations for PDCCH. The different situations are described below.

[0186] In some embodiments, the system information is MIB, and the terminal monitors the PDCCH in the cell-level CSS. The cell-level CSS refers to the CSS that all terminals in the cell need to listen to. Additionally, the cell-level CSS is the CSS that the terminal needs to monitor when it is in RRC idle state. For example, this cell-level CSS includes CSS for transmitting DCI information for scheduling system information, CSS for transmitting DCI information for scheduling paging, CSS for transmitting DCI information for scheduling paging wake-up signals, and CSS for transmitting DCI information related to scheduling random access procedures. Alternatively, there may also be CSS for DCI information for scheduling broadcast / multicast services.

[0187] For example, in the above embodiment, the system information is MIB. The network device sends the MIB to the terminal, and the terminal monitors the PDCCH in the cell-level CSS based on the monitoring parameters indicated by the MIB.

[0188] In some embodiments, the system information is SIB1, and the terminal monitors the PDCCH in other cell-level CSSs; wherein, other cell-level CSSs are cell-level CSSs other than the CSS used to monitor DCI, which is used to schedule SIB1. In embodiments of this disclosure, the terminal uses predefined monitoring parameters to monitor the system information (SIB1), and the cell-level CSS used is the CSS for monitoring the scheduling DCI of SIB1, and then monitors the PDCCH in other cell-level CSSs based on the monitoring parameters indicated by SIB1. These other cell-level CSSs include CSSs for transmitting and scheduling DCIs for scheduling other system information (excluding SIB1), CSSs for transmitting and scheduling paging information, CSSs for transmitting and scheduling wake-up signals, and CSSs for transmitting and scheduling information related to random access procedures. In other scenarios, there may also be CSSs for scheduling DCIs for broadcast / multicast services.

[0189] In some embodiments, the names of information, etc., are not limited to the names described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0190] In some embodiments, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0191] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transmit,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0192] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0193] The PDCCH monitoring involved in the embodiments of this disclosure may include at least one of steps S2101 to S2102. For example, at least one of steps S2101 to S2102 may be implemented as a standalone embodiment.

[0194] In some embodiments, at least one of steps S2101 to S2102 is optional, and one or more of these steps may be omitted or substituted in different embodiments. In some embodiments, refer to the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, which will not be repeated here.

[0195] Figure 3 is a schematic flowchart of PDCCH monitoring according to an embodiment of the present disclosure. As shown in Figure 3, the embodiment of the present disclosure relates to PDCCH monitoring, and the above method includes:

[0196] Step S3101: The network device sends system information to the terminal.

[0197] In some embodiments, system information is used to indicate monitoring parameters.

[0198] In some embodiments, the implementation of step S3101 can be referred to the implementation of step S2101 in FIG2A, and will not be repeated here.

[0199] In some embodiments, the system information includes parameter values, and monitoring the PDCCH using the monitoring parameters includes:

[0200] The PDCCH is monitored using a monitoring parameter indicated by the parameter value in a group.

[0201] In some embodiments, the system information includes a group identifier, and monitoring the PDCCH using the monitoring parameters includes:

[0202] The PDCCH is monitored using monitoring parameters in a group identified by the group identifier.

[0203] In some embodiments, the monitoring parameter is an aggregation level;

[0204] The step of monitoring the DCCH using the monitoring parameters includes: monitoring the PDCCH using the aggregation level and the number of candidates corresponding to the aggregation level;

[0205] The aggregation level is used to indicate the amount of time-frequency resources occupied by the downlink control information (DCI) carried by the PDCCH, and the candidate number is used to indicate the number of monitoring areas. The monitoring area refers to the area in which the terminal monitors the DCI carried by the PDCCH, and the monitoring area includes the amount of time-frequency resources indicated by the aggregation level.

[0206] In some embodiments, the aggregation level is the highest or lowest aggregation level in the group.

[0207] In some embodiments, the system information is a MIB;

[0208] The monitoring of PDCCH includes:

[0209] Monitor the PDCCH in the community-level public search space (CSS).

[0210] In some embodiments, the system information is SIB1;

[0211] The monitoring of PDCCH includes: monitoring PDCCH in other cell-level CSS;

[0212] The other cell-level CSSs are cell-level CSSs other than those used for monitoring DCI, which is used to schedule SIB1.

[0213] In some embodiments, the terminal is in a connected state, an idle state, or an inactive state.

[0214] Step S3102: The terminal receives system information sent by the network device.

[0215] In some embodiments, the implementation of step S3102 can be referred to the implementation of step S2101 in FIG2A, and will not be repeated here.

[0216] Step S3103: The terminal uses monitoring parameters to monitor the PDCCH.

[0217] In some embodiments, the system information includes parameter values ​​that indicate a monitoring parameter in a group.

[0218] In some embodiments, the system information includes a group identifier.

[0219] In some embodiments, the monitoring parameter is an aggregation level;

[0220] The aggregation level is used to indicate the amount of time-frequency resources occupied by the downlink control information (DCI) carried by the PDCCH. The number of candidates corresponding to the aggregation level is used to indicate the number of monitoring areas. The monitoring area refers to the area in which the terminal monitors the DCI carried by the PDCCH. The monitoring area includes the number of time-frequency resources indicated by the aggregation level.

[0221] In some embodiments, the aggregation level is the highest or lowest aggregation level in the group.

[0222] In some embodiments, the system information is a MIB;

[0223] The PDCCH mentioned is the PDCCH in the community-level public search space (CSS).

[0224] In some embodiments, the system information is SIB1;

[0225] The PDCCH refers to the PDCCH in other cell-level CSS.

[0226] The other cell-level CSSs are cell-level CSSs other than those used for monitoring DCI, which is used to schedule SIB1.

[0227] Figure 4 is a schematic flowchart of PDCCH monitoring according to an embodiment of the present disclosure. As shown in Figure 4, the present disclosure relates to PDCCH monitoring, and the above method includes:

[0228] In step S4101, for PDCCH monitoring in the cell CSS, the base station can indicate whether to adjust the AL / candidate number of PDCCH blind detection.

[0229] In this case, the blind detection of PDCCH is similar to the monitoring of PDCCH in the above embodiments, AL is the aggregation level in the above embodiments, and the number of candidates is the number of candidates in the above embodiments.

[0230] Optionally, the base station may instruct the UE to use another set of AL / candidate numbers to listen to the PDCCH based on the actual air interface traffic volume, for example, when the air interface traffic volume is low. This requires fewer blind detections, thereby reducing the PDCCH blind detection overhead of the UE.

[0231] For example, for a cell CSS, assuming the protocol defines the original PDCCH blind detection AL / candidate number as: (AL / candidate number) = (4 / 4), (AL / candidate number) = (8 / 2), and (AL / candidate number) = (16 / 1). During data transmission and reception, the base station can instruct the UE to only listen to (AL / candidate number) = (16 / 1) for the cell CSS based on the real-time situation. Comparing these two cases, assuming the UE only monitors one DCI format and one RNTI, the UE can save 4 + 2 + 1 - 1 = 6 PDCCH blind detections. Generally, there will be multiple cell CSSs, and different RNTIs in the fallback DCI format need to be monitored in different CSSs, such as SI-RNTI, P-RNTI, PEI-RNTI, RA-RNTI, TC-RNTI. If some PDCCH blind detections can be reduced in each cell CSS, the total energy saved by reducing PDCCH blind detections across multiple cell CSSs will be significant.

[0232] In step S4102, the UE performs a blind PDCCH test based on the adjusted AL / candidate number.

[0233] In particular, step S4102 is similar to the terminal sending capability information in step S2102 above.

[0234] Example 1:

[0235] The protocol defines one set of ALs / candidates for the cell CSS (one set of ALs / candidates contains one or more ALs, and each AL corresponds to one or more candidate numbers). The base station indicates the ALs / candidate numbers of the blind detection cell CSS to be applied in the MIB information.

[0236] 1. M (M>=1) bits are used in the MIB to indicate the number of ALs / candidates to be applied to the CSS of the blind detection cell.

[0237] The AL parameter to be applied can be one or more of the aforementioned AL / candidate number. For example, AL is the maximum value of all ALs defined in the cell CSS; the candidate number to be applied is the candidate number corresponding to the one or more ALs. Another example is the minimum value of all candidate numbers defined in the cell CSS.

[0238] If M = 1. When this bit = '0', the UE performs blind PDCCH detection in the cell CSS according to the 1 set of ALs / candidates defined in the cell CSS according to the protocol; when this bit = '1', the UE performs blind PDCCH detection in the cell CSS according to the maximum value of all ALs defined in the cell CSS / candidates number being the candidate number corresponding to the maximum AL.

[0239] 2. The cell CSS is the CSS that the UE listens to when it is in RRC idle state. The cell CSS includes CSS for transmitting DCI information for scheduling systems, CSS for transmitting DCI information for scheduling paging, CSS for transmitting DCI information for scheduling paging wake-up signals, and CSS for transmitting DCI information related to scheduling random access procedures. In some other scenarios, the CSS may also include CSS for DCI information used to schedule broadcast / multicast services.

[0240] Example 2:

[0241] The protocol defines N sets of ALs / candidate numbers for a cell CSS (each set of ALs / candidate numbers contains one or more ALs, and each AL corresponds to one candidate number). The base station indicates in the MIB information which set of ALs / candidate numbers of the blind detection cell CSS to apply.

[0242] 1. M (M>=1) bits are used in the MIB to indicate the number of ALs / candidates to be applied to the CSS of the blind detection cell.

[0243] For example, when N=2, M=1 can be set. When this bit='0', the UE performs blind PDCCH detection in the cell CSS according to the first set of ALs / candidates defined by the protocol; when this bit='1', the UE performs blind PDCCH detection in the cell CSS according to the second set of ALs / candidates defined by the protocol.

[0244] Generally, the second set of AL / candidate number is used when air interface resources are sufficient, and AL = 16 / candidate number = 1 can be set.

[0245] 2. The cell CSS is the CSS that the UE listens to when it is in the RRC idle state. This CSS includes CSS for transmitting DCI information, CSS for transmitting DCI information, CSS for transmitting DCI information, CSS for transmitting DCI information, and CSS for transmitting DCI information related to the random access procedure. In some other scenarios, there may also be CSS for DCI information used to schedule broadcast / multicast services.

[0246] Example 3:

[0247] The protocol defines one set of ALs / candidates for the CSS of a cell (one set of ALs / candidates contains one or more ALs, and each AL corresponds to one or more candidate numbers).

[0248] Specifically, the UE performs blind PDCCH detection in the CSS of the DCI used for scheduling SIB1, according to the CSS definition of the cell, using one set of AL / candidate numbers. After the UE obtains SIB1, it determines the AL / candidate numbers to use for blind PDCCH detection in other CSSs of the cell based on the configuration information in SIB1.

[0249] 1. In SIB1, use M (M>=1) bits to indicate the number of ALs / candidates to be applied to other CSSs in the blind detection cell.

[0250] The AL parameter to be applied can be one or more ALs from a set of ALs / candidates defined in the cell CSS of the above protocol.

[0251] For example, AL is the maximum value of all ALs defined in the community CSS; the number of candidates to be applied is the candidate corresponding to one or more ALs, or, for example, the number of candidates is the minimum value of all candidate numbers defined in the community CSS.

[0252] Where M=1. When this bit='0', the UE performs blind PDCCH detection in other CSSs of the cell according to the 1 set of ALs / candidates defined in the cell CSS according to the protocol; when this bit='1', the UE performs blind PDCCH detection in other CSSs of the cell according to the maximum value of all ALs of the cell CSS defined in the protocol / candidates, which is the candidate number corresponding to the maximum AL.

[0253] 2. Other cell CSSs refer to the cell CSSs that the UE listens to when it is in RRC idle state, excluding the cell CSS corresponding to the DCI that schedules SIB1. These include CSSs used to transmit scheduling information for other systems (excluding SIB1), CSSs used to transmit scheduling paging information, CSSs used to transmit scheduling wake-up signals, and CSSs used to transmit information related to scheduling random access procedures. In some other scenarios, other CSSs may also include CSSs used to schedule broadcast / multicast services.

[0254] Under normal circumstances, if the system information does not change, the UE will not frequently attempt to receive SIB1 and other system information, but it will need to frequently attempt to receive paging and paging wake-up information. Therefore, even if the number of AL / candidates for PDCCH blind detection is reduced only in other CSS blind detections in the cell, significant energy-saving gains can still be achieved.

[0255] 3. In this scenario, when the UE performs blind detection of the DCI in SIB1, it must perform PDCCH blind detection according to the one set of AL / candidate numbers defined in the protocol. When performing blind detection of other CSSs in the cell, it can perform PDCCH blind detection according to the AL / candidate numbers indicated in SIB1. If SIB1 does not indicate the AL / candidate numbers for other CSSs in the cell, then PDCCH blind detection is performed according to the AL / candidate numbers for the cell CSS defined in the protocol.

[0256] Example 4:

[0257] The protocol defines N sets of ALs / candidates for the CSS of a cell (one set of ALs / candidates contains one or more ALs, and each AL corresponds to one candidate).

[0258] Specifically, the UE performs blind PDCCH detection in the CSS of the DCI used for scheduling SIB1, using the default AL / candidate number from the N sets defined in the cell CSS. After the UE obtains SIB1, it determines the AL / candidate number to use for blind PDCCH detection in other CSSs of the cell based on the configuration information in SIB1.

[0259] 1. In SIB1, use M (M>=1) bits to indicate which AL / candidate number should be applied to other CSSs in the blind detection cell.

[0260] 2. Other cell CSSs refer to the cell CSSs that the UE listens to when it is in the RRC idle state, excluding the cell CSS corresponding to the DCI that schedules SIB1. These include CSSs used to transmit scheduling information for other systems (excluding SIB1), CSSs used to transmit scheduling paging information, CSSs used to transmit scheduling wake-up signals, and CSSs used to transmit information related to scheduling random access procedures. In some other scenarios, other CSSs may also include CSSs used to schedule broadcast / multicast services.

[0261] Normally, if the system information does not change, the UE will not frequently attempt to receive SIB1 and other system information, but it will frequently attempt to receive paging and paging wake-up information. Therefore, even if only the reduced PDCCH blind detection AL / candidate number is used in other CSS blind detections in the cell, a significant energy saving gain can be obtained.

[0262] 3. In this scenario, when the UE performs blind detection of the DCI in SIB1, it should perform PDCCH blind detection according to the default set of AL / candidate number defined in the protocol. When performing blind detection of other CSSs in the cell, it can determine which set of ALs to use for PDCCH blind detection according to the instructions in SIB1. If SIB1 does not indicate the PDCCH blind detection parameters for other CSSs in the cell, then the PDCCH blind detection should be performed according to the default set of ALs / candidate number defined in the cell CSS.

[0263] This disclosure also proposes an apparatus (also referred to as a communication device, etc.) for implementing any of the above methods. For example, an apparatus is proposed that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Furthermore, another apparatus is proposed that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0264] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0265] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0266] Figure 5A is a schematic diagram of the structure of a terminal according to an embodiment of this disclosure. Terminal 5100 is used to execute any of the above methods. In some embodiments, as shown in Figure 5A, terminal 5100 may include at least one of a transceiver module 5101, a processing module 5102, etc. In some embodiments, transceiver module 5101 is used to receive system information sent by a network device, the system information being used to indicate monitoring parameters; processing module 5102 is used to monitor the PDCCH using the monitoring parameters.

[0267] Figure 5B is a schematic diagram of the structure of a network device according to an embodiment of this disclosure. The network device 5200 is used to perform any of the above methods. In some embodiments, as shown in Figure 5B, the network device 5200 may include at least one of a transceiver module 5201, a processing module 5202, etc. In some embodiments, the transceiver module 5201 is used to send system information to a terminal, the system information being used to indicate monitoring parameters; the monitoring parameters are used by the terminal to use and monitor the PDCCH.

[0268] Optionally, the transceiver module described above is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal in any of the above methods, which will not be elaborated here. Optionally, the processing module described above is used to perform at least one of the other steps performed by the terminal in any of the above methods, which will not be elaborated here.

[0269] Figure 6A is a schematic diagram of the structure of the communication device 6100 proposed in an embodiment of this disclosure. The communication device 6100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a sensing function device, a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 6100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0270] As shown in Figure 6A, the communication device 6100 is used to execute any of the above methods. In some embodiments, the communication device 6100 includes one or more processors 6101. The processor 6101 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control sensing devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 6100 is used to execute any of the above methods. Optionally, one or more processors 6101 are used to invoke instructions to cause the communication device 6100 to execute any of the above methods.

[0271] In some embodiments, the communication device 6100 further includes one or more transceivers 6102. When the communication device 6100 includes one or more transceivers 6102, the transceiver 6102 performs at least one of the communication steps such as sending and / or receiving in the above-described method, and the processor 6101 performs at least one of the other steps. In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0272] In some embodiments, the communication device 6100 further includes one or more memories 6103 for storing data and / or instructions. Optionally, one or more processors 6101 are used to invoke instructions stored in the memory 6103 to cause the communication device 6100 to perform any of the above methods. Optionally, all or part of the memory 6103 may also be located outside the communication device 6100. In an optional embodiment, the communication device 6100 may include one or more interface circuits 6104. Optionally, the interface circuit 6104 is connected to the memory 6102 and can be used to receive data and / or instructions from the memory 6102 or other devices, and can be used to send data and / or instructions to the memory 6103 or other devices. For example, the interface circuit 6104 can read data and / or instructions stored in the memory 6103 and send the data and / or instructions to the processor 6101.

[0273] The communication device 6100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 6100 described in this disclosure is not limited thereto, and the structure of the communication device 6100 may not be limited by FIG. 6A. The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data, programs and / or instructions; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (6) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (7) others, etc.

[0274] Figure 6B is a schematic diagram of the structure of chip 6200 according to an embodiment of this disclosure. For cases where the communication device 6100 can be a chip or a chip system, please refer to the schematic diagram of chip 6200 shown in Figure 6B, but it is not limited thereto.

[0275] Chip 6200 includes one or more processors 6201. Chip 6200 is used to perform any of the methods described above.

[0276] In some embodiments, chip 6200 further includes one or more interface circuits 6202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 6200 further includes one or more memories 6203 for storing data and / or instructions. Optionally, all or part of the memories 6203 may be located outside of chip 6200. Optionally, interface circuit 6202 is connected to memory 6203, and interface circuit 6202 can be used to receive data and / or instructions from memory 6203 or other devices, and interface circuit 6202 can be used to send data and / or instructions to memory 6203 or other devices. For example, interface circuit 6202 can read data and / or instructions stored in memory 6203 and send the data and / or instructions to processor 6201.

[0277] In some embodiments, the interface circuit 6202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 6202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 6202 performs data and / or instruction interaction between the processor 6201, the chip 6200, the memory 6203, or the transceiver device. In some embodiments, the processor 6201 performs at least one of the other steps.

[0278] The modules and / or devices described in the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0279] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0280] This disclosure also proposes a program product, including a program and / or instructions, which, when executed by a communication device, cause the communication device to perform any of the above methods. Optionally, the program product is a computer program product. Optionally, the program product is stored on the storage medium.

[0281] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods. Industrial applicability

[0282] Network devices can re-indicate monitoring parameters to terminals through system information. Terminals can then monitor the PDCCH based on the re-indicated monitoring parameters, which improves the flexibility of the monitoring parameters used by the terminal when monitoring the PDCCH and thus ensures the reliability of communication between the terminal and network devices.

Claims

1. A method for monitoring the Physical Downlink Control Channel (PDCCH), wherein, The method is executed by a terminal, and the method includes: Receive system information sent by network devices, the system information being used to indicate monitoring parameters; Use the monitoring parameters to monitor PDCCH.

2. The method according to claim 1, wherein, The system information includes parameter values, and the monitoring of the PDCCH using the monitoring parameters includes: The PDCCH is monitored using a monitoring parameter indicated by the parameter value in a group.

3. The method according to claim 1, wherein, The system information includes a group identifier, and the monitoring of the PDCCH using the monitoring parameters includes: The PDCCH is monitored using monitoring parameters in a group identified by the group identifier.

4. The method according to claim 2, wherein, The monitoring parameters are aggregated levels; The step of monitoring the DCCH using the monitoring parameters includes: monitoring the PDCCH using the aggregation level and the number of candidates corresponding to the aggregation level; The aggregation level is used to indicate the amount of time-frequency resources occupied by the downlink control information (DCI) carried by the PDCCH, and the candidate number is used to indicate the number of monitoring areas. The monitoring area refers to the area in which the terminal monitors the DCI carried by the PDCCH, and the monitoring area includes the amount of time-frequency resources indicated by the aggregation level.

5. The method according to claim 4, wherein, The aggregation level is the highest or lowest aggregation level in the group.

6. The method according to any one of claims 1 to 5, wherein, The system information is the MIB; The monitoring of PDCCH includes: Monitor the PDCCH in the community-level public search space (CSS).

7. The method according to any one of claims 1 to 6, wherein, The system information is SIB1; The monitoring of PDCCH includes: monitoring PDCCH in other cell-level CSS; The other cell-level CSSs are cell-level CSSs other than those used for monitoring DCI, which is used to schedule SIB1.

8. The method according to any one of claims 1 to 7, wherein, The terminal is in a connected state, an idle state, or an inactive state.

9. A method for monitoring the Physical Downlink Control Channel (PDCCH), wherein, The method is performed by a network device, and the method includes: Send system information to the terminal, the system information being used to indicate monitoring parameters; The monitoring parameters are used by the terminal to use and monitor the PDCCH.

10. The method according to claim 9, wherein, The system information includes parameter values, which are used to indicate a monitoring parameter in a group.

11. The method according to claim 9, wherein, The system information includes group identifiers.

12. The method according to claim 10, wherein, The monitoring parameters are aggregated levels; The aggregation level is used to indicate the amount of time-frequency resources occupied by the downlink control information (DCI) carried by the PDCCH. The number of candidates corresponding to the aggregation level is used to indicate the number of monitoring areas. The monitoring area refers to the area in which the terminal monitors the DCI carried by the PDCCH. The monitoring area includes the number of time-frequency resources indicated by the aggregation level.

13. The method according to claim 12, wherein, The aggregation level is the highest or lowest aggregation level in the group.

14. The method according to any one of claims 9 to 13, wherein, The system information is the MIB; The PDCCH mentioned is the PDCCH in the community-level public search space (CSS).

15. The method according to any one of claims 9 to 13, wherein, The system information is SIB1; The PDCCH refers to the PDCCH in other cell-level CSS. The other cell-level CSSs are cell-level CSSs other than those used for monitoring DCI, which is used to schedule SIB1.

16. A physical downlink control channel (PDCCH) monitoring device, wherein, The device includes: The transceiver module is used to receive system information sent by network devices, and the system information is used to indicate monitoring parameters; A processing module is used to monitor the PDCCH using the monitoring parameters.

17. A physical downlink control channel (PDCCH) monitoring device, wherein, The device includes: The transceiver module is used to send system information to the terminal, the system information being used to indicate monitoring parameters; The monitoring parameters are used by the terminal to use and monitor the PDCCH.

18. A communication device, wherein, The communication device is used to perform the method according to any one of claims 1 to 8.

19. A communication device, wherein, The communication device is used to perform the method according to any one of claims 9 to 15.

20. A communication system comprising a terminal and network equipment, wherein, The terminal is configured to implement the method as described in any one of claims 1 to 8; The network device is configured to implement the method as described in any one of claims 9 to 15.

21. A storage medium storing instructions, wherein, When the instructions are executed on the communication device, the communication device performs the method as described in any one of claims 1 to 8.

22. A storage medium storing instructions, wherein, When the instructions are executed on the communication device, the communication device performs the method as described in any one of claims 9 to 15.

23. A program product comprising at least one of a program and instructions, wherein, When at least one of the programs or instructions is executed by the communication device, it implements the method as described in any one of claims 1 to 8.

24. A program product comprising at least one of a program and instructions, wherein, When at least one of the programs or instructions is executed by the communication device, it implements the method as described in any one of claims 9 to 15.

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