Patent Description:
In the current discussions on new radio (NR), a terminal device may communicate with multiple transmission-reception points (TRPs) or multiple beams simultaneously.

Multiple physical downlink control channels (PDCCHs) may be transmitted through the multiple TRPs or multiple beams, respectively.

Therefore, how to implement simultaneous transmission of multiple downlink control channels is a problem urgent to be solved.

<NPL>, discusses that a search space is associated with a single control resource set; a natural way to support multiple NR-PDCCH in NR is to associate one NR-PDCCH to a CORESET group, where the association can be defined or configured; different NR-PDCCH are in different CORESET groups, i.e. there is one-to-one mapping between an NR-PDCCH and a CORESET group.

<CIT> discloses methods for configuring a transmission between a base station and a user equipment (UE) equipment. A plurality of control resource sets (Coresets) may be determined, and the plurality of Coresets may be grouped into one or more Corset groups. A Coreset group may include a first Coreset and a second Coreset. The first Coreset may provide a common search space, and the second Coreset may provide a UE specific search space. The one or more Coreset groups may be used to configure a transmission of data to the UE. The first Coreset and the second Coreset for a particular Coreset group may be configured to enable narrow band monitoring of the Coreset group by the UE.

<NPL>, discusses that the maximum number of PDCCH (from different TPR) can be configured to a UE for monitoring is at least <NUM>, while the maximum number of PDCCH (from different TPR) can be simultaneously monitored is a UE capability.

The claimed invention implements simultaneous transmission of multiple downlink control channels.

In accordance with the invention, a method for wireless communication (<NUM>) is provided in claim <NUM>.

In accordance with the invention, a terminal device (<NUM>) is provided in claim <NUM>.

In embodiments of the disclosure, M (i.e., an integer greater than or equal to <NUM>) downlink control channels are detected using N (i.e., an integer greater than or equal to <NUM>) groups of search spaces or N groups of CORESETs, multiple downlink control channels are detected. Moreover, different groups of search spaces or different groups of CORESETs are used for detecting different downlink control channels, there is no need for the terminal device to detect M downlink control channels in each search space, thereby saving power consumption of the terminal device.

The following describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some embodiments of the present disclosure rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

The technical solutions of the embodiments of the present disclosure may be applied to various communications systems, such as: a Global System for Mobile Communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, and a <NUM>th generation wireless system (<NUM> system).

As an example, <FIG> illustrates a communication system <NUM> to which the embodiments of the present disclosure are applied. The communication system <NUM> may include a network device <NUM>. The network device <NUM> may be a device communicating with a terminal device (also called as a communication terminal or a terminal). The network device <NUM> may provide communication coverage for a particular geographic area, and may communicate with a terminal device located within the coverage area. Optionally, the network device <NUM> may be a base transceiver station (BTS) in a GSM system or CDMA system, or may be a NodeB (NB) in a WCDMA system, or may be an evolved NodeB (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN); or, the network device may be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network side device in a <NUM> network, a network device in a future evolved public land mobile network (PLMN) or the like.

The wireless communications system <NUM> further includes at least one terminal device <NUM> located within the coverage of the network device <NUM>. The terminal devices used herein are connected through, but is not limited to: a wired line such as a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, or a directness cable; and/or another data connection/network; and/or a wireless interface, such as for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcasting transmitter; and/or apparatus configured to receive or send communication signals in another terminal device; and/or a device of Internet of things (IoT). The terminal device configured to communicate via a wireless interface may be called as a "wireless communication terminal", a "wireless terminal" or a "mobile terminal". Examples of a mobile terminal include but are not limited to: a satellite telephone or a cellular telephone; a personal communications system (PCS) terminal that is capable of combining capabilities of cellular radio telephones, data process, faxes and data communication; a PDA that may include a cellular radiotelephone, a pager, an Internet/Intranet access, a Web browser, an organizer, a calendar and/or a global positioning system (GPS) receiver; and a conventional laptop and/or palmtop receiver or other electronic device that includes a radiotelephone transceiver. The terminal device may be an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile console, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communications device, a user agent, or a user apparatus. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device having a wireless communication function, a computing device, another processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a <NUM> network, a terminal device in a future evolved PLMN or the like.

Optionally, the terminal devices <NUM> may perform device to device (D2D) communication with each other.

Optionally, the <NUM> system or network may be further referred to as a new radio (NR) system or network.

<FIG> illustrates one network device and two terminal devices as an example. Optionally, the communication system <NUM> may include multiple network devices and another number of terminal devices may be included within coverage of each network device. This is not limited in this embodiment of the present disclosure.

Optionally, the communication system <NUM> may further include other network entities such as a network controller and a mobility management entity. This is not limited in this embodiment of the present disclosure.

It should be understood that, a device having a communication function in a network/system of the embodiments of the present disclosure may be referred to as a communication device. Taking the communication system <NUM> illustrated in <FIG> as an example, a communication device may include a network device <NUM> and a terminal device <NUM> that have communication functions. The network device <NUM> and the terminal device <NUM> may be specific devices described above, details are not described herein again. The communication device may further include other devices in the communication system <NUM>, such as a network controller, a mobility management entity or the like. This is not limited in this embodiment of the present disclosure.

It should be understood that, terms "system" and "network" in the present disclosure are usually interchangeably used.

In the new radio (NR) system, a terminal device may communicate with multiple transmission-reception points (TRPs) or multiple beams simultaneously. For example, as illustrated in <FIG>, TRP1 and TRP2 may communicate with the terminal device simultaneously; as illustrated in <FIG>, a base station (gNB) may communicate with the terminal device through multiple beams. The communication manner may adopt the following two schemes.

In a first scheme, UE receives only one PDCCH which indicates indication information of data transmitted through multiple TRPs/beams.

In a second scheme, UE receives different PDCCHs from different TRPs/beams, each of the PDCCHs indicates respective indication information of a data transmission.

The second scheme may be applied in the following scenarios.

Scenario <NUM>: multiple TRPs belong to the same cell, a connection (backhaul) between the TRPs is ideal (i.e., the multiple TRPs can exchange information quickly and dynamically).

Scenario <NUM>: multiple TRPs belong to the same cell, a backhaul between the TRPs is non-ideal (i.e., the multiple TRPs is not able to perform information interaction rapidly, and only relatively slow data interaction can be performed).

Scenario <NUM>: multiple TRPs belong to different cells, a backhaul between the TRPs is ideal.

Scenario <NUM>: multiple TRPs belong to different cells, a backhaul between the TRPs is non-ideal.

The four application scenarios of the second scheme are introduced above by taking the TRP as an example. The above four application scenarios may also be applied in multiple-beam scenarios. For brevity, details are not described herein again.

In the second scheme, UE needs to detect multiple pieces of downlink control Information (DCIs). However, if UE does not continue to detect downlink (DL) grant (i.e., DCI for downlink) when one DL grant is detected by the UE in a preset search space, the scheme would not be achieved. Therefore, solutions for solving this problem are provided in the following embodiments of the present disclosure. Herein, before describing the solutions in the embodiments of the present disclosure, introduction of some concepts in the embodiments of the present disclosure is provided, these concepts may be applied in all of the solutions in the embodiments of the present disclosure.

A search space/control resource set (CORESET) group in the embodiments of the present disclosure may be referred to a search space group or a CORESET group; each search space/CORESET group may include at least one search space/CORESET.

A search space in the embodiments of the present disclosure may be referred to a search space set, then one search space group may include at least one search space or search space set.

Each search space in the embodiments of the present disclosure may be associated with one control resource set, i.e., CORESET. One CORESET may be associated with one or more search spaces, different search spaces may be associated with different control resource sets.

The CORESET may indicate a size of the resource set in time domain, a size and position of the resource set in frequency domain. The position of the resource set in time domain is indicated by the search space.

The network device can configure the CORESET and the search space. During configuring the search space, a DCI format applicable to the search space, and whether the search space is used for carrying an uplink grant or a downlink grant or carrying the both may be configured.

<FIG> is a schematic block diagram of a method for wireless communication <NUM> according to an embodiment of the present disclosure. The method <NUM> includes at least part of the following content.

At <NUM>, a terminal device detects M downlink control channels using N search space/control resource set (CORESET) groups, where N is an integer greater than or equal to <NUM>, M is an integer greater than or equal to <NUM>, and different search space/CORESET groups are used for detecting different downlink control channels.

In an embodiment of the present disclosure, M is equal to N, and the N search space/CORESET groups are in one-to-one correspondences with M downlink control channels.

Specifically, the number of the downlink control channels detected by the terminal device is equal to the number of search space/CORESET groups. Each downlink control channel corresponds to a respective search space/CORESET group, and the downlink control channel is detected through the corresponding search space/CORESET group.

Of course, in an embodiment of the present disclosure, M is not equal to N. For example, N is larger than M, then a certain downlink control channel corresponds to more than two search space/CORESET groups, and then the more than two search space/CORESET groups are detected when detecting the downlink control channel.

In an embodiment of the present disclosure, at least one of a downlink grant or an uplink grant is carried in the downlink control channel. In an embodiment of the present disclosure, one downlink control channel carrys one downlink grant, or carry one uplink grant, or simultaneously carry one downlink grant and one uplink grant.

It should be understood that, the channel that carries one downlink grant and one uplink grant is also referred to as two downlink control channels, which will not be limited in the embodiment of the present disclosure.

In an embodiment of the present disclosure, M downlink control channels carry M downlink grants; or, M downlink control channels carry M uplink grants; or, M downlink control channels carry M uplink grants and M downlink grants.

It should be understood that, the embodiment of the present disclosure is not limited to this. As an example, some downlink control channels among the M downlink control channels carry uplink grants and do not carry downlink grants, and some downlink control channels among the M downlink control channels carry downlink grants and do not carry uplink grants. As an example, some downlink control channels among the M downlink control channels carry uplink grants and downlink grants, and some downlink control channels among the M downlink control channels carry uplink grants and do not carry downlink grants. As an example, some downlink control channels among the M downlink control channels carry uplink grants and downlink grants, and some downlink control channels among the M downlink control channels carry downlink grants and do not carry uplink grants.

In an embodiment of the present disclosure, the M downlink control channels are transmitted simultaneously, i.e., transmitted at the same point in time.

In an embodiment of the present disclosure, the M downlink control channels are transmitted through multiple beams, multiple TRPs, or multiple antenna panels. Specifically, the M downlink control channels are transmitted through multiple beams, multiple TRPs, or multiple antenna panels simultaneously, and each downlink control channel is transmitted through a respective beam/TRP/antenna panel.

M downlink control channels are transmitted on the same carrier.

The embodiments of the present disclosure are applied in a scenario of carrier aggregation, and each of at least part carriers in the carrier aggregation transmits M downlink control channels.

One downlink control channel is transmitted through one beam, one TRP or one antenna panel, and different downlink control channels are transmitted through different beams, TRPs or antenna panels, respectively.

When transmitting the downlink control channel through the beam, TRP or antenna panel, the corresponding search space/CORESET group is applied for the transmission.

In an embodiment of the present disclosure, when one downlink (DL) grant is detected by the terminal device in a respective search space/CORESET group corresponding to each of the M downlink control channels, detection of the DL grant is stopped; and/or when one uplink (UL) grant is detected by the terminal device in a respective search space/CORESET group corresponding to each of the M downlink control channels, detection of the UL grant is stopped.

When one DL grant is detected by the terminal device in a search space/CORESET group corresponding to a certain downlink control channel, and no UL grant is detected in the search space/CORESET group, the terminal device continues to detect the UL grant. Alternatively, the terminal device detects only the DL grant in the search space/CORESET group and not detect the UL grant.

Similarly, when one UL grant is detected by the terminal device in a search space/CORESET group corresponding to a certain downlink control channel, and no DL grant is detected in the search space/CORESET group, the terminal device continues to detect the DL grant. Alternatively, the terminal device detects only the UL grant in the search space/CORESET group and not detect the DL grant.

Alternatively, whether the terminal device detects both the DL grant and the UL grant in a search space/CORESET group corresponding to a certain downlink control channel is determined according to configuration of the search space/CORESET group.

For example, when a certain search space/CORESET group is configured for transmitting an UL grant, detection is stopped when one UL grant is detected. When a certain search space/CORESET group is configured for transmitting a DL grant, detection is stopped when one DL grant is detected. When a certain search space/CORESET group is configured for transmitting an UL grant and a DL grant, detection is stopped when one UL grant and one DL grant are both detected.

A single carrier is considered here (even if the TRPs belong to different cells, there is an overlapping part in the frequencies of the TRPs). In this case, one uplink grant and/or downlink grant is carried in one downlink control channel. If considering carrier aggregation and cross-carrier scheduling, multiple downlink grants (and/or multiple uplink grants) are detected through one search space/CORESET group, and different downlink grants (and/or uplink grants) correspond to physical downlink shared channel (PDSCH) schedulings (and/or physical uplink shared channel (PUSCH) schedulings) on different carriers.

In an embodiment of the present disclosure, an association between a search space/CORESET group and a downlink control channel is preset in the terminal device according to a protocol. The association is also pre-configured in the terminal device by other devices.

In an embodiment of the present disclosure, a respective search space/CORESET group that each search space/CORESET belongs to is preset in the terminal device according to a protocol. It is also pre-configured in the terminal device by other devices.

In a first implementation, a terminal device receives first information from a network device. The first information indicates a search space/CORESET group to which a first search space/CORESET belongs. The first search space/CORESET is any search space/CORESET included in the N search space/CORESET groups.

Specifically, the network device indicates a search space/CORESET group to which a single search space/CORESET belongs.

The network device is a TRP. The network device indicates only a search space/CORESET group to which a search space/CORESET used by the TRP per se for transmitting a downlink control channel belongs. The network device indicates a search space/CORESET group to which a search space/CORESET used by another TRP for transmitting a downlink control channel belongs.

Alternatively, the network device is a gNB. The gNB indicates a respective search space/CORESET group to which each search space/CORESET included in the N search space/CORESET groups belongs. The gNB transmits M downlink control channels through multiple beams or antenna panels; or, the gNB controls other devices (for example, M TRPs) to transmit M downlink control channels.

Since one CORESET is associated with one or more search spaces, the terminal device groups the search spaces after a group to which a CORESET belongs is configured.

The first information indicates the search space/CORESET group to which the first search space/CORESET belongs through at least one of: whether the first information carries a specific field; or a value of the specific field of the first information.

For example, if there are two search space/CORESET groups, and a specific field is carried in the first information, it means that the first search space/CORESET belongs to a first search space/CORESET group among the two search space/CORESET groups; if no specific field is carried in the first information, it means that the first search space/CORESET belongs to a second search space/CORESET group among the two search space/CORESET groups.

For example, if there are two search space/CORESET groups, and a value of a specific field carried in the first information is <NUM>, it means that the first search space/CORESET belongs to a first search space/CORESET group among the two search space/CORESET groups; if the value of the specific field carried in the first information is <NUM>, it means that the first search space/CORESET belongs to a second search space/CORESET group among the two search space/CORESET groups.

The first information is used for configuring configuration information of the first search space/CORESET.

When configuring a certain search space/CORESET, configuration information of the certain search space/CORESET indicates a search space/CORESET group to which the certain search space/CORESET belongs. The configuration information also has other information, for example, information for indicating the DCI format of the search space/CORESET.

The first information is carried in radio resource control (RRC) signaling or medium access control (MAC) control element (CE) signaling.

The MAC CE signaling is dedicated to the first information, or the MAC CE signaling is further used for carrying a transmission configuration information (TCI) state.

For clearer understanding about the first implementation, a first embodiment and a second embodiment are illustrated below respectively.

A network device configures a search space for UE, configuration information of the search space includes an identity which indicates a search space group to which the search space belongs (i.e., SearchSpaceId).

There are two manners for configuring the identity.

If the UE receives the configuration information for a certain search space transmitted by the network device, the UE determines whether the search space belongs to group X or Y according to the identity in the configuration information (herein, two groups are described for simplicity, the description is extended to more than two groups).

If UE detects one DL grant in a search space belonging to the group X (herein, a single carrier is considered for simplicity, if considering carrier aggregation and cross-carrier scheduling, multiple DL grants are detected according to the configuration, and different DL grants correspond to PDSCH schedulings on different carriers, respectively), the UE performs some optimization processing, for example, UE stops to detect DL grant to save power consumption. UE performs a similar operation in search spaces belonging to the group Y.

A physical implementation of the above embodiment is as follows: the search spaces belonging to the group X correspond to PDCCH schedulings transmitted from TRP A, and the search spaces belonging to the group Y correspond to PDCCH schedulings transmitted from TRP B.

The specific signaling design is adding a field on the basis of the existing RRC signaling.

A network device configures CORESET for UE, configuration information of the CORESET includes an identity which indicates a group to which the CORESET belongs (i.e., CORESET ID).

Manner <NUM>: the field to which the identity belongs is always in the configuration information, that is, each CORESET has a respective identity for indicating the group it belongs to.

Manner <NUM>: the field to which the identity belongs is in the configuration information, and the CORESET belongs to a default group when the identity is not configured for the CORESET.

If UE receives configuration information for CORESETs and search spaces, the UE determines groups for all of the search spaces according to the identity. Search spaces (SSs) associated with CORESETs belonging to the same group belong to the same group, and the SSs associated with the CORESETs of different groups belong to different groups, respectively. According to this rule, different groups are divided into according to configuration information of all of the SSs and corresponding CORESETs. It is assumed that all of the SSs belong to group X and group Y (here, two groups are described for simplicity, the description is generalized to more than two groups).

If UE detects one DL grant in a search space belonging to the group X (here, a single carrier is considered for simplicity, if considering carrier aggregation and cross-carrier scheduling, multiple DL grants are detected according to the configuration, and different DL grants correspond to PDSCH schedulings on different carriers, respectively), UE performs some optimization processing, for example, UE stops to detect DL grant to save power consumption. UE performs a similar operation in search spaces belonging to the group Y.

A physical implementation of the above embodiment is as follows: the search spaces belonging to the group X correspond to PDCCH schedulings transmitted through TRP A, and the search spaces belonging to the group Y correspond to PDCCH schedulings transmitted through TRP B.

The specific signaling design is adding a field on the basis of the existing RRC signaling (or a new RRC signaling modified according to other function in the future).

The network device configure corresponding CORESET for UE through RRC signaling, and then configuring group information of one or more CORESETs through MAC CE. The above configuration is in an individual MAC CE signaling, or, the above configuration is in a signaling with MAC CE configuration of TCI state.

In a second implementation not being part of the invention, the terminal device receives second information from the network device. The second information indicates a respective search space/CORESET group to which each search space/CORESET included in the N search space/CORESET groups belongs.

The second information indicates a respective search space/CORESET group to which each search space/CORESET belongs by carrying an association between a search space/CORESET and a search space/CORESET group; or the second information indicates a search space/CORESET group to which a first search space/CORESET belongs according to whether the second information carries identity information of the first search space/CORESET.

Optionally, the second information is carried in one of the following fields in signaling: a physical downlink control channel (PDCCH) configuration filed, i.e., PDCCH-Config; a physical downlink shared channel (PDSCH) configuration filed, i.e., PDSCH-Config; a common PDCCH configuration filed, i.e., pdcch-ConfigCommon; or a common PDSCH configuration filed, i.e., pdsch-ConfigCommon. The common PDCCH configuration filed and the common PDSCH configuration filed may correspond to multiple terminal devices.

Optionally, the second information is carried in RRC signaling.

For clearer understanding of the present disclosure, a third embodiment is illustrated below.

Configuration information from the network device to UE indicates grouping information of multiple search spaces/control resource sets. The configuration information includes grouping information for SSs and/or grouping information for CORESETs.

Specifically, the configuration is implemented as follows.

In an implementation, it is assumed that there are <NUM> groups.

In another implementation, it is assumed that there are <NUM> groups. Group <NUM> [identification number x1, identification number x2,. ] (identification number of SS or CORESET).

Other SSs or CORESETs which are not in the Group <NUM> belong to another group, i.e., Group <NUM>.

The above configuration information is configured in the following RRC signaling. Specifically, the configuration information is carried in the following fields.

All of the SSs belong to different groups according to the above configuration, and the UE uses a similar manner as in other embodiments for detecting a downlink control channel.

On the basis of the above solutions, UE is able to try to detect multiple downlink grants and uplink grants, and thus the condition that stopping detection when one downlink grant or uplink grant is detected is avoided. Therefore, the processing complexity of UE is reduced and the power consumption is saved. This is because if the network informs the UE to detect multiple downlink grants or uplink grants without the foregoing groups, the UE needs to try to detect two DCIs in each of the search spaces. But now if one DCI is detected in one group, there is no need to continue to detect the next DCI in the group, thereby the power consumption can be saved.

Accordingly, in the embodiments of the present disclosure, a terminal device detects M (M is an integer greater than or equal to <NUM>) downlink control channels using N (N is an integer greater than or equal to <NUM>) search space/CORESET groups, multiple downlink control channels can be detected. Moreover, different search space/CORESET groups are used for detecting different downlink control channels, there is no need for the terminal device to detect M downlink control channels in each search space, so that the power consumption of the terminal device is saved.

It should be understood that, in the embodiments of the present disclosure, the concept of search space/CORESET group is not known in the terminal device side. The network device configures a respective downlink control channel used by each search space/CORESET for detection, or configures a respective search space/CORESET corresponding to each downlink control channel during the specific configuration. In other words, the above configuration of the group to which a search space/CORESET belongs, corresponds to configuration of the downlink control channel used by the search space/CORESET for detection. However, a search space/CORESET corresponding to one downlink control channel is understood as one search space/CORESET group.

<FIG> is a schematic block diagram of a method for wireless communication <NUM> according to an embodiment of the present disclosure. The method is implemented by a gNB.

At <NUM>, a network device detects M downlink control channels using N search space/control resource set (CORESET) groups. The network device transmits the downlink control channels through beams or multiple antenna panels.

N is an integer greater than or equal to <NUM>, M is an integer greater than or equal to <NUM>, and different search space/CORESET groups are used for detecting different downlink control channels.

In an embodiment of the present disclosure, the method <NUM> further includes that:.

The network device transmits first information to a terminal device, the first information indicates a search space/CORESET group to which a first search space/CORESET belongs.

In an embodiment of the present disclosure, the first information indicates the search space/CORESET group to which the first search space/CORESET belongs through at least one of: whether the first information carries a specific field; or a value of the specific field of the first information.

In an embodiment of the present disclosure, the first information is used for configuring configuration information of the first search space/CORESET.

In an embodiment of the present disclosure, the first information is carried in radio resource control (RRC) signaling or medium access control (MAC) control element (CE) signaling.

In an embodiment of the present disclosure, the MAC CE signaling is dedicated to the first information; or the MAC CE signaling is further used for carrying a transmission configuration information (TCI) state.

In an optional embodiment not being part of the invention, the method <NUM> may further include that:.

The network device transmits second information to the terminal device, where the second information indicates a respective search space/CORESET group to which each search space/CORESET included in the N search space/CORESET groups belongs.

In an optional embodiment not being part of the invention, the second information indicates a respective search space/CORESET group to which each search space/CORESET belongs by carrying an association between a search space/CORESET and a search space/CORESET group; or.

the second information indicates a search space/CORESET group to which a first search space/CORESET belongs through whether the second information carries identity information of the first search space/CORESET.

In an optional embodiment not being part of the invention, the second information is carried in one of the following fields in signaling: a physical downlink control channel (PDCCH) configuration filed; a physical downlink shared channel (PDSCH) configuration filed; a common PDCCH configuration filed; or a common PDSCH configuration filed.

In an optional embodiment not being part of the invention, the second information is carried in RRC signaling.

In an embodiment of the present disclosure, at least one of the following applies: the M downlink control channels are used for uplink scheduling; or the M downlink control channels are used for downlink scheduling.

In an embodiment of the present disclosure, the M downlink control channels are transmitted through M beams respectively; or the M downlink control channels are from M transmission-reception points (TRPs) respectively.

In an embodiment of the present disclosure, the M downlink control channels are simultaneously transmitted through the M beams or by the M TRPs, respectively.

In an embodiment of the present disclosure, the M downlink control channels are transmitted through the same carrier.

It should be understood that, the specific implementation of the method <NUM> refers to the description of the method <NUM>. For brevity, details are not described herein again.

<FIG> is a schematic block diagram of a method for wireless communication <NUM> according to an embodiment of the present disclosure. The method is implemented by a gNB or TRP.

The method <NUM> includes at least part of the following contents.

At <NUM>, a network device transmits first information to a terminal device, the first information indicates a search space/CORESET group, among N search space/CORESET groups, to which a first search space/CORESET belongs. The N search space/CORESET groups are used by the terminal device for detecting M downlink control channels.

<FIG> is a schematic block diagram of a method for wireless communication <NUM> not being part of the invention. The method <NUM> includes at least part of the following contents. The method may be implemented by a gNB or TRP.

At <NUM>, a network device transmits second information to a terminal device, the second information indicates a respective search space/control resource set (CORESET) group to which each search space/CORESET included in N search space/CORESET groups belongs.

The N search space/CORESET groups are used by the terminal device for detecting M downlink control channels.

In an optional embodiment not being part of the invention, the second information is carried in radio resource control (RRC) signaling.

<FIG> is a schematic block diagram of a terminal device <NUM> according to an embodiment of the present disclosure. The terminal device <NUM> includes a communication unit <NUM>.

The communication unit <NUM> is configured to detect M downlink control channels using N search space/control resource set (CORESET) groups.

In an embodiment of the present disclosure, the communication unit <NUM> is further configured to receive first information from a network device.

The first information indicates a search space/CORESET group to which a first search space/CORESET belongs.

In an optional embodiment not being part of the invention, the communication unit <NUM> is further configured to receive second information from the network device.

The second information indicates a respective search space/CORESET group to which each search space/CORESET included in the N search space/CORESET groups belongs.

In an embodiment of the present disclosure, the communication unit <NUM> is further configured to:.

when at least one of one downlink (DL) grant or one uplink (UL) grant is detected in a respective search space/CORESET group corresponding to each of the M downlink control channels, stopping detection.

In an embodiment of the present disclosure, M downlink control channels are transmitted through the same carrier.

It should be understood that, the terminal device <NUM> is configured to implement corresponding operations that are implemented by the terminal device of method <NUM>. For brevity, details are not described herein again.

<FIG> is a schematic block diagram of a network device <NUM> according to an embodiment of the present disclosure. The network device <NUM> includes a communication unit <NUM>.

In an embodiment of the present disclosure, a terminal device detects M downlink control channels using N search space/CORESET groups, where N is an integer greater than or equal to <NUM>, M is an integer greater than or equal to <NUM>, and different search space/CORESET groups are used for detecting different downlink control channels.

In an embodiment of the present disclosure, the communication unit <NUM> is configured to transmit first information to a terminal device.

In an optional embodiment not being part of the invention the communication unit <NUM> is configured to transmit second information to the terminal device.

The second information indicates a respective search space/CORESET group to which each search space/CORESET included in N search space/CORESET groups belongs.

In an embodiment of the present disclosure, M downlink control channels are transmitted through a single carrier.

It should be understood that, the network device <NUM> is configured to implement corresponding operations that are implemented by the network device of methods <NUM>-<NUM>. For brevity, details are not described herein again.

<FIG> is a schematic structure diagram of a communication device <NUM> according to an embodiment of the present disclosure. The communication device <NUM> illustrated in <FIG> includes a processor <NUM>. The processor <NUM> is configured to call and execute a computer program stored in a memory to perform the method according to an embodiment of the present disclosure.

As illustrated in <FIG>, the communication device <NUM> further includes a memory <NUM>. The processor <NUM> is configured to call and execute the computer program stored in the memory <NUM> to perform the method according to an embodiment of the present disclosure.

The memory <NUM> is an individual device independent from the processor <NUM>, or is integrated in the processor <NUM>.

As illustrated in <FIG>, the communication device <NUM> further includes a transceiver <NUM>. The processor <NUM> controls the transceiver <NUM> to communicate with other devices, specifically, to transmit information or data to other devices, or receive information or data from other devices.

The transceiver <NUM> further includes an antenna, the number of antennas is one or more.

The communication device <NUM> is specifically a network device in the embodiments of the present disclosure. The communication device <NUM> implements corresponding processes that are implemented by the network device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

The communication device <NUM> is specifically a mobile terminal/terminal device in the embodiments of the present disclosure. The communication device <NUM> implements corresponding processes that are implemented by the mobile terminal/terminal device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

<FIG> is a schematic structure diagram of a chip according to an embodiment of the present disclosure. The chip <NUM> illustrated in <FIG> includes a processor <NUM>. The processor <NUM> is configured to call and execute a computer program stored in a memory to perform the method according to an embodiment of the present disclosure.

As illustrated in <FIG>, the chip <NUM> further includes a memory <NUM>. The processor <NUM> is configured to call and execute the computer program stored in the memory <NUM> to perform the method according to an embodiment of the present disclosure.

The chip <NUM> further includes an input interface <NUM>. The processor <NUM> controls the input interface <NUM> to communicate with other devices or chips, specifically, to obtain information or data from other devices or chips.

The chip <NUM> further includes an output interface <NUM>. The processor <NUM> controls the output interface <NUM> to communicate with other devices or chips, specifically, to output information or data to other devices or chips.

The chip is applied to a network device in the embodiments of the present disclosure. The chip implements corresponding processes that are implemented by the network device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

The chip is applied in a mobile terminal/terminal device in the embodiments of the present disclosure. The chip implements corresponding processes that are implemented by the mobile terminal/terminal device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

It should be understood that, the chip mentioned in the embodiments of the present disclosure is also referred to a system-level chip, a system chip, a chip system or a chip of a system on chip, etc..

As illustrated in <FIG>, the communication system <NUM> includes a terminal device <NUM> and a network device <NUM>.

The terminal device <NUM> is configured to implement corresponding functions that are implemented by the terminal device of the above method. And the network device <NUM> is configured to implement corresponding functions that are implemented by the network device of the above method. For brevity, details are not described herein again.

It should be understood that, the processor of the embodiment of the present disclosure is an integrated circuit chip, and has a signal processing capability. During implementation, the steps of the foregoing method embodiments are implemented using a hardware integrated logic circuit in the processor or implemented using one or more instructions in a software form. The foregoing processor is a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or another programmable logical device, discrete gate or transistor logical device, or discrete hardware component. The processor implements or performs methods, steps and logical block diagrams disclosed in the embodiments of the present disclosure. The general purpose processor is a microprocessor or the processor is any conventional processor and the like. Steps of the methods disclosed with reference to the embodiments of the present disclosure are be directly executed and completed by means of a hardware decoding processor, or are executed and completed using a combination of hardware and software modules in the decoding processor. The software module is be located in a mature storage medium in the field, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically-erasable programmable memory, or a register. The storage medium is located in the memory, and the processor reads information from the memory and completes the steps in the foregoing methods in combination with hardware of the processor.

It can be understood that, the memory in the embodiments of the present disclosure is a transitory memory or a non-transitory memory, or includes both a transitory memory and a non-transitory memory. The non-transitory memory is a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The transitory memory is a random access memory (RAM), and is used as an external cache. Through exemplary but not limitative description, many forms of RAMs are used, for example, a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchlink dynamic random access memory (SLDRAM) and a direct rambus random access memory (DR RAM). It should be noted that, the memory for the system and the method described herein aims to include but not limited to these memories and any other suitable types of memories.

It should be understood that, the foregoing memory is exemplary but not limitative description, for example, the memory in the embodiments of the present disclosure is a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synch link dynamic random access memory (SLDRAM) and a direct rambus random access memory (DR RAM), etc. It should be noted that, the memory in the embodiments of the present disclosure aims to include but not limited to these memories and any other suitable types of memories.

An embodiment of the present disclosure further provides a computer-readable storage medium, configured to store a computer program.

The computer-readable storage medium is applied to a network device in embodiments of the present disclosure, and the computer program causes a computer to perform corresponding processes that are implemented by the network device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

The computer-readable storage medium is applied to a mobile terminal/terminal device in embodiments of the present disclosure, and the computer program causes a computer to perform corresponding processes that are implemented by the mobile terminal/terminal device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

An embodiment of the present disclosure further provides a computer program product including a computer program.

The computer program product is applied to a network device in embodiments of the present disclosure, and the computer program instructions cause a computer to perform corresponding processes that are implemented by the network device in various methods of the embodiments of the present disclosure. For brevity, details are not described herein again.

The computer program product is applied to a mobile terminal/terminal device in embodiments of the present disclosure, and the computer programs cause a computer to perform corresponding processes that are implemented by the mobile terminal/terminal device in various method of the embodiments of the present disclosure. For brevity, details are not described herein again.

An embodiment of the present disclosure further provides a computer program.

The computer program is applied to a network device in embodiments of the present disclosure, when the computer program is executed by a computer, it causes the computer to perform corresponding processes that are implemented by the network device in various method of the embodiments of the present disclosure. For brevity, details are not described herein again.

The computer program is applied to a mobile terminal/terminal device in embodiments of the present disclosure, when the computer program is executed by a computer, it causes the computer to perform corresponding processes that are implemented by the mobile terminal/terminal device in various method of the embodiments of the present disclosure. For brevity, details are not described herein again.

A person of ordinary skill in the art may be aware that, in combination with the examples described in the embodiments disclosed in this specification, units and algorithm steps may be implemented by electronic hardware, or a combination of computer software and electronic hardware.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other schemes. For example, the described apparatus embodiment is merely exemplary. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electrical, mechanical or other forms.

When the functions are implemented in a form of a software functional module and sold or used as an independent product, the functions may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of this application essentially, or the part contributing to the prior art, or part of the technical solutions may be implemented in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, and the like) to perform all or a part of the steps of the method described in the embodiment of the present disclosure. The foregoing storage medium includes: any medium that can store program codes, such as a USB flash disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

Claim 1:
A method for wireless communication (<NUM>), comprising:
detecting (<NUM>), by a terminal device, M downlink control channels using N groups of search spaces or N groups of control resource sets, CORESETs,
wherein N is an integer greater than or equal to <NUM>, M is an integer greater than or equal to <NUM>, and different groups of search spaces or different groups of CORESETs are used for detecting different downlink control channels,
characterized in that the method further comprises:
receiving, by the terminal device, first information from a network device, wherein the first information indicates a search space group to which a first search space belongs or a CORESET group to which a first CORESET belongs, through at least one of:
whether the first information carries a specific field; or
a value of the specific field of the first information.