Pdcch frequency domain resource configuration method and device

Abstract

Embodiments of the present disclosure provide a PDCCH frequency domain resource configuration method and device. The method comprises: when a physical downlink control channel (PDCCH) mask state switching condition is met, adjusting the states of a plurality of preset PDCCH masks, wherein the states of the plurality of PDCCH masks comprise: a valid state and an invalid state; and determining an available control resource on the basis of the states of the plurality of PDCCH masks, and on the basis of the available control resource, determining a candidate position set for transmitting downlink control information (DCI).

Description

PDCCH frequency domain resource configuration method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on Chinese patent application CN202410003662.8, filed on January 2, 2024, entitled “PDCCH frequency domain resource configuration method and device”, and claims the priority of the patent application, and all the disclosed contents thereof are incorporated into this application by reference. Technical Field

[0003] The embodiments of the present disclosure relate to the field of wireless communication technology, and in particular to a method and apparatus for configuring PDCCH frequency domain resources. Background Art

[0004] In commercial networks, the control resource set (CORESET) typically occupies the entire spectrum bandwidth to maximize Physical Downlink Control Channel (PDCCH) resources and meet high-capacity scheduling requirements. However, commercial network frequency bands may sometimes be subject to interference. If Downlink Control Information (DCI) is transmitted in an interfering frequency band, the reliability of the user equipment (UE) in demodulating the PDCCH will be reduced. Therefore, the frequency domain location of DCI transmission needs to be staggered to avoid interfering frequency bands.

[0005] This can be achieved through base station scheduling avoidance. The principle is that after the base station detects an interfering frequency band, it selects a DCI transmission location from a set of candidate locations that does not overlap with the interfering frequency band, thereby improving the reliability of PDCCH demodulation. However, since the number of blind detections is a UE capability and has a maximum limit, if interference is present at some of the candidate locations in the set, the number of available blind detections will decrease, leading to an increase in PDCCH resource allocation failures and a decrease in cell scheduling capacity.

[0006] Reconfiguring PDCCH CORESET resources can also achieve DCI transmission frequency domain locations that avoid interfering bands. This works by reconfiguring the cell's CORESET resources to avoid interfering bands. Since candidate locations are calculated only within the CORESET resources, all candidate locations are offset from interfering bands, preventing a reduction in available blind detection times. However, changes to CORESET frequency domain resources in 5G NR systems require notification to all UEs via reconfiguration messages, which can lead to signaling storms and introduce significant scheduling overhead to the base station. Summary of the Invention

[0007] The embodiments of the present disclosure provide a PDCCH frequency domain resource configuration method and apparatus to at least solve the problem in related technologies that when the frequency domain position of DCI transmission is staggered from the interference frequency band, the cell scheduling capacity will be reduced or a large amount of scheduling overhead will be introduced.

[0008] According to one embodiment of the present disclosure, a PDCCH frequency domain resource configuration method is provided, which is applied to a base station, including: when a physical downlink control channel PDCCH mask state switching condition is met, adjusting the states of multiple pre-set PDCCH masks, wherein the states of the multiple PDCCH masks include: an effective state and an ineffective state; determining available control resources according to the states of the multiple PDCCH masks, and determining a set of candidate positions for transmitting downlink control information DCI based on the available control resources.

[0009] According to another embodiment of the present disclosure, a PDCCH frequency domain resource configuration method is provided, which is applied to a terminal, including: determining the status of each physical downlink control channel PDCCH mask based on a detected control channel message, wherein the status of the PDCCH mask includes: an effective state and an ineffective state; determining available control resources based on the status of the PDCCH mask, and determining a set of candidate positions for transmitting downlink control information DCI based on the available control resources.

[0010] According to another embodiment of the present disclosure, a PDCCH frequency domain resource configuration device is provided, which is located on the base station and includes: determining the status of each physical downlink control channel PDCCH mask based on the detected control channel message, wherein the status of the PDCCH mask includes: an effective state and an ineffective state; determining available control resources based on the status of the PDCCH mask, and determining a set of candidate positions for transmitting downlink control information DCI based on the available control resources.

[0011] According to another embodiment of the present disclosure, a PDCCH frequency domain resource configuration device is provided, which is located on a terminal and includes: a detection module, configured to determine the status of each physical downlink control channel PDCCH mask based on a detected control channel message, wherein the status of the PDCCH mask includes: an effective state and an ineffective state; a determination module, configured to determine available control resources based on the status of the PDCCH mask, and determine a candidate position set based on the available control resources.

[0012] According to another embodiment of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is configured to execute the steps of any one of the above method embodiments when running.

[0013] According to another embodiment of the present disclosure, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any one of the above method embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a hardware structure block diagram of a mobile terminal executing a method for configuring PDCCH frequency domain resources according to an embodiment of the present disclosure;

[0015] FIG2 is a flowchart of a method for configuring PDCCH frequency domain resources according to an embodiment of the present disclosure;

[0016] FIG3 is a flowchart of a method for configuring PDCCH frequency domain resources according to another embodiment of the present disclosure;

[0017] FIG4 is a structural block diagram of a device for configuring PDCCH frequency domain resources according to an embodiment of the present disclosure;

[0018] FIG5 is a structural block diagram of a device for configuring PDCCH frequency domain resources according to another embodiment of the present disclosure;

[0019] FIG6 is a structural block diagram of an apparatus for dynamically adjusting downlink control channel resources in the frequency domain according to an embodiment of the present disclosure;

[0020] FIG7 is a flowchart of a method for dynamically adjusting PDCCH frequency domain resources according to an embodiment of the present disclosure;

[0021] FIG8 is a schematic diagram of a PDCCH mask configuration in an interference avoidance scenario according to an embodiment of the present disclosure;

[0022] FIG9 is a first schematic diagram of a PDCCH mask indication in an interference avoidance scenario according to an embodiment of the present disclosure;

[0023] FIG10 is a second schematic diagram of a PDCCH mask indication in an interference avoidance scenario according to an embodiment of the present disclosure;

[0024] FIG11 is a flowchart of a method for dynamic frequency domain adjustment of downlink control channel resources according to an embodiment of the present disclosure;

[0025] FIG12 is a schematic diagram of a PDCCH mask configuration in an inter-cell coordinated allocation scenario according to an embodiment of the present disclosure;

[0026] FIG13 is a schematic diagram of a PDCCH mask indication in an inter-cell coordinated allocation scenario according to an embodiment of the present disclosure;

[0027] FIG14 is a flowchart of a method for dynamically adjusting downlink control channel resources in the frequency domain according to another embodiment of the present disclosure;

[0028] FIG15 is a schematic diagram of a PDCCH mask configuration according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in conjunction with embodiments.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0031] The method embodiments provided in the embodiments of the present disclosure can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking operation on a mobile terminal as an example, FIG1 is a hardware structure block diagram of a mobile terminal that runs the PDCCH frequency domain resource configuration method according to an embodiment of the present disclosure. As shown in FIG1 , the mobile terminal may include one or more (only one is shown in FIG1 ) processors 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It will be understood by those skilled in the art that the structure shown in FIG1 is only for illustration and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than those shown in FIG1 , or have a configuration different from that shown in FIG1 .

[0032] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the PDCCH frequency domain resource configuration method in the embodiment of the present disclosure. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implementing the above-mentioned method. The memory 104 may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely located relative to the processor 102, and these remote memories may be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0033] The transmission device 106 is used to receive or send data via a network. A specific example of the aforementioned network may include a wireless network provided by the mobile terminal's communications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0034] In this embodiment, a method for configuring PDCCH frequency domain resources running on the above-mentioned mobile terminal is provided. The method is applied to a base station. FIG2 is a flow chart of the method for configuring PDCCH frequency domain resources according to an embodiment of the present disclosure. As shown in FIG2 , the process includes the following steps:

[0035] Step S202, when a physical downlink control channel PDCCH mask state switching condition is met, adjusting the states of a plurality of pre-set PDCCH masks;

[0036] The PDCCH mask is a collection of some resource blocks within the frequency domain of the control resource set. The PDCCH mask exists in two states: inactive and active. Available control resources are determined based on the PDCCH mask state. When the PDCCH mask is inactive, the available control resources are all resource blocks within the frequency domain of the control resource set. When the PDCCH mask is active, the available control resources are all resource blocks within the frequency domain of the control resource set excluding the resource blocks corresponding to the PDCCH mask. A set of candidate locations for transmitting downlink control information (DCI) is determined based on the available control resources.

[0037] Before step S202 of this embodiment, the method further includes: sending a control channel message to the terminal, wherein the DCI field of the control channel message carries a PDCCH mask indication bit field, and the indication bit field is used to indicate the status of the PDCCH mask.

[0038] In this embodiment, the base station may send CORESET resources and multiple sets of PDCCH mask (PDCCH Mask) configurations to the UE, wherein the PDCCH mask indicates the position through the cell-level resource block (RB) bitmap and can be configured as multiple continuous masks or discontinuous masks.

[0039] In this embodiment, the PDCCH mask state switching condition includes at least one of the following: detection of an interfering network, and serving cell load state switching.

[0040] In one embodiment, when the PDCCH mask state switching condition is the detection of an interfering network, before adjusting the states of the pre-set multiple PDCCH masks, the method further includes: pre-setting the multiple PDCCH masks for the control resource set according to the potential interfering network, wherein the number of the PDCCH masks is equal to the number of interference frequency bands of the potential interfering network, and the position of the PDCCH mask corresponds to the interference position of the interfering network; and sending at least one of the following information to the terminal through RRC signaling: the number of the PDCCH masks, the position of the PDCCH mask, the configuration information of the control resource set, and the number of blind detections required by the terminal.

[0041] In one embodiment, adjusting the states of a plurality of preset PDCCH masks includes: starting a PDCCH mask switching timer, and adjusting the state of the PDCCH mask corresponding to the actual interfering network to the effective state at a first preset moment.

[0042] In this embodiment, when the base station starts the PDCCH mask switching timer, the UE will also start the PDCCH mask switching timer synchronously to ensure consistency of the available CORESET resources used by the base station and the UE. For example, before the switching timer expires, the base station and the UE determine the available control resources based on the PDCCH mask in the effective state before the adjustment; after the switching timer expires, the base station and the UE determine the available control resources based on the PDCCH mask in the effective state after the adjustment.

[0043] In one embodiment, when the PDCCH mask state switching condition is the service cell load state switching, before adjusting the states of the pre-set multiple PDCCH masks, the method further includes: according to the frequency domain range of the carrier where the control resource set is located, setting the multiple PDCCH masks for the control resource set within the frequency domain range, wherein the control resource set is the control resource set of the service cell or any adjacent cell of the service cell, and the configuration of the control resource set of the service cell and any adjacent cell is the same; based on the set multiple PDCCH masks, sending at least one of the following information to the terminal through RRC signaling: the configuration of the control resource set, the number of the PDCCH masks corresponding to the service cell, the position of the PDCCH mask, and the number of blind detections required by the terminal.

[0044] In one embodiment, adjusting the status of multiple pre-set PDCCH masks includes: when the service cell is in a low-load state, starting a PDCCH mask switching timer, and adjusting the status of the PDCCH mask of the service cell to the effective state at a second preset time.

[0045] In one embodiment, when an interfering network is detected and the serving cell load state is switched, the control resource set includes a first part of the control resource set and a second part of the control resource set. Before adjusting the states of the pre-set multiple PDCCH masks, the method further includes: for the first part of the control resource set corresponding to the frequency band of the interfering network in the frequency domain range, setting multiple first PDCCH masks for the first part of the control resource set according to the potential interfering network, wherein the number of the first PDCCH masks is equal to the number of the interfering frequency bands of the potential interfering network, and the position of the first PDCCH mask corresponds to the interference position of the potential interfering network; for the second part of the control resource set whose frequency domain range does not correspond to the frequency band of the interfering network, setting multiple first PDCCH masks for the first part of the control resource set according to the potential interfering network The frequency domain range of the source set is used, and multiple second PDCCH masks are set for the second part of the control resource set within the frequency domain range, wherein the control resource set is the control resource set of the service cell or any adjacent cell of the service cell, and the configuration of the control resource set of the service cell and any adjacent cell is the same; based on the set multiple first PDCCH masks and the multiple second PDCCH masks, at least one of the following information is sent to the terminal through RRC signaling: the configuration of the control resource set, the number of the first PDCCH masks corresponding to the service cell, the number of the second PDCCH masks, the position of the first PDCCH mask, the number of the second PDCCH masks, and the number of blind detections required by the terminal.

[0046] In step S202 of this embodiment, the states of multiple pre-set PDCCH masks are adjusted, including at least one of the following: when the interfering network is detected, starting the PDCCH mask switching timer, and according to the actual interfering network, adjusting the state of the first PDCCH mask corresponding to the actual interfering network to the effective state at a third preset time; when the service cell is in a low load state, starting the PDCCH mask switching timer, and adjusting the state of the second PDCCH mask of the service cell to the effective state at a fourth preset time.

[0047] Step S204: determining available control resources according to the states of the multiple PDCCH masks, and determining a candidate position set based on the available control resources.

[0048] In this embodiment, the available control resources are: the control resources in the control resource set corresponding to the physical downlink control channel (PDCCH), excluding the control resources corresponding to the active PDCCH mask. Following step S204 of this embodiment, the method further includes: determining a set of candidate positions based on the available control resources and the number of blind detections; selecting a target position from the set of candidate positions, and transmitting downlink control information at the target position, wherein the target position is any position not currently used for scheduling a terminal.

[0049] Through the above steps, based on the pre-set PDCCH mask, when an interference frequency band exists in the PDCCH resources, the available CORESET resources can be dynamically adjusted according to the effective PDCCH mask. In this way, the candidate DCI location set obtained based on the available CORESET resources can avoid interference locations and reduce the number of blind detections. There is no need to reconfigure the available CORESET resources, thus avoiding the large number of signaling storms caused by reconfiguration. Therefore, this solves the problem in related technologies that the need to shift the frequency domain location of DCI transmission to avoid interference frequency bands can lead to a decrease in cell scheduling capacity or the introduction of large scheduling overhead, thereby improving the reliability of PDCCH demodulation.

[0050] The present disclosure also provides a method for configuring PDCCH frequency domain resources. The method is applied to a terminal, as shown in FIG3 , and includes the following steps:

[0051] Step S302, determining the state of each physical downlink control channel PDCCH mask according to the detected control channel message, wherein the state of the PDCCH mask includes: an effective state and an ineffective state;

[0052] In this embodiment, the DCI field of the control channel message carries a PDCCH mask indication bit field, and the indication bit field is used to indicate the state of the PDCCH mask.

[0053] Step S304: determining available control resources according to the state of the PDCCH mask, and determining a candidate position set based on the available control resources.

[0054] In step S304 of this embodiment, it includes: according to the control channel message, when it is detected that the state of the PDCCH mask has changed, starting the PDCCH mask switching timer; before the PDCCH mask switching timer expires, according to the original effective state of the PDCCH mask, determining the available control resources from the control resource set; after the PDCCH mask switching timer expires, according to the effective state of the PDCCH mask indicated by the control channel message, determining the available control resources from the control resource set.

[0055] After step S304 of this embodiment, the method further includes: monitoring all candidate set positions in the candidate position set to receive downlink control information carrying scheduling information.

[0056] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present disclosure.

[0057] This embodiment also provides a PDCCH frequency domain resource configuration device, which is used to implement the above-mentioned embodiments and preferred implementations. Details already described are not repeated here. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0058] FIG4 is a structural block diagram of a device for configuring PDCCH frequency domain resources according to an embodiment of the present disclosure. The device is located on a base station. As shown in FIG4 , the device includes an adjustment module 41 and a configuration module 42 .

[0059] The adjustment module 41 is configured to adjust the states of a plurality of pre-set PDCCH masks when a physical downlink control channel PDCCH mask state switching condition is met, wherein the states of the plurality of PDCCH masks include: an effective state and an ineffective state;

[0060] The configuration module 42 is configured to determine available control resources according to the states of the multiple PDCCH masks, and determine a candidate position set based on the available control resources.

[0061] FIG5 is a structural block diagram of a device for configuring PDCCH frequency domain resources according to an embodiment of the present disclosure. The device is located on a terminal. As shown in FIG5 , the device includes: a detection module 51 and a determination module 52 .

[0062] The detection module 51 is configured to determine the state of each physical downlink control channel PDCCH mask according to the detected control channel message, wherein the state of the PDCCH mask includes: an effective state and an ineffective state;

[0063] The determination module 52 is configured to determine available control resources according to the state of the PDCCH mask, and determine a candidate position set based on the available control resources.

[0064] It should be noted that the above modules can be implemented through software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0065] In the 5G NR system, PDCCH is used to transmit DCI. PDCCH resources are flexibly configured through CORESET (Control-Resource Set) and search space. CORESET can configure the frequency domain location of PDCCH resources, and search space can configure the number of blind detections of aggregation degree. Based on these configurations, the base station and UE (User Equipment) can calculate a set of DCI transmission candidate locations, where the number of DCI transmission candidate locations included in the set is the same as the number of blind detections. The base station side selects a DCI transmission candidate location from the candidate location set to send DCI, and the UE side blindly detects all candidate location sets to receive DCI and obtain the scheduling information in the DCI.

[0066] In actual applications, commercial network frequency bands may sometimes be subject to interference. If DCI is transmitted in the interference band, the reliability of UE demodulation of PDCCH will be reduced. Therefore, the frequency domain location of DCI transmission needs to be staggered to avoid the interference band. Common ways to avoid this include:

[0067] (1) Avoidance through base station scheduling. The principle is that after the base station detects the interference frequency band, it selects a location that does not overlap with the interference frequency band when selecting a DCI transmission location from the candidate location set, thereby improving the reliability of PDCCH demodulation. However, since the number of blind detections is a UE capability and has a maximum limit, when some candidate locations in the candidate location set have interference, the number of available blind detections will be reduced, which will lead to an increase in PDCCH resource allocation failures and a decrease in cell scheduling capacity.

[0068] (2) CORESET reconfiguration: The principle is to reconfigure the cell CORESET to avoid the interference frequency band. Since the candidate positions are only calculated within the CORESET resources, all candidate positions will be staggered to avoid the interference frequency band, which will not reduce the number of available blind detections. However, the CORESET frequency domain resource changes of the 5G NR system need to be notified to all UEs through reconfiguration messages, which will cause signaling storms and introduce a large amount of scheduling overhead to the base station.

[0069] (3) Configure multiple CORESETs. Multiple CORESETs with different frequency domains are configured based on potential interference locations. The base station dynamically selects one of these CORESETs based on interference detection or interference anticipation. However, multiple CORESETs are a UE capability, and some UEs do not support this capability. Furthermore, blind detection times must be allocated to multiple CORESETs. Since the total number of blind detections is fixed, the available blind detection times for each CORESET are reduced.

[0070] The present disclosure provides a device for dynamically adjusting the frequency domain of downlink control channel resources, located on a base station, to solve the problem of DCI transmission avoiding interference frequency bands. As shown in Figure 6, the device includes:

[0071] The PDCCH resource management module 61 is configured to configure CORESET resources and PDCCH masks, calculate available CORESET resources based on the effective state of the PDCCH mask, and calculate a set of candidate locations within the available CORESET resources. The PDCCH resource management module functionally includes the functions of the adjustment module and configuration module of the above-mentioned embodiment.

[0072] The PDCCH mask indication module 62 is configured to calculate the PDCCH mask indication bit field length according to the PDCCH mask quantity configured by the PDCCH resource management module; at the same time, adjust the PDCCH mask indication according to the cell status maintenance and determine the effective time of the adjusted PDCCH mask.

[0073] The cell status maintenance module 63 is configured to monitor the frequency band interference status and the cell load status.

[0074] The apparatus for dynamically adjusting the frequency domain of downlink control channel resources in the disclosed embodiment performs a PDCCH mask indication based on the PDCCH mask configuration and cell status maintained by the module, and determines when the PDCCH mask takes effect. When there is interference in the network, the PDCCH resource frequency domain is adjusted to avoid interference, improving the reliability of PDCCH demodulation. When there is no interference in the network, the PDCCH resource frequency domain is adjusted to the full bandwidth to ensure scheduling capacity.

[0075] In order to ensure that PDCCH resource allocation avoids interference frequency bands, the embodiment of the present disclosure further provides a method for dynamically adjusting PDCCH frequency domain resources. FIG7 is a flowchart of the method for dynamically adjusting PDCCH frequency domain resources according to an embodiment of the present disclosure. As shown in FIG7 , the method includes the following steps:

[0076] In step S701, the base station determines the parameter configuration of the PDCCH mask based on the number and location of potential interference frequency bands in the commercial network. The parameter configuration of the PDCCH mask includes: the location of the PDCCH mask and the number of PDCCH masks; the number of PDCCH masks is the same as the number of interference frequency bands, and the location of the PDCCH mask corresponds to the interference location.

[0077] In this embodiment, the CORESET frequency domain resource configuration includes the entire bandwidth of the carrier, and the CORESET resource configuration includes: the frequency domain range and the time domain range of the CORESET.

[0078] Step S702: The base station sends the CORESET resource configuration and PDCCH mask parameter configuration to the UE.

[0079] In one embodiment, the base station sends CORESET resources and multiple sets of PDCCH Mask configurations to the UE.

[0080] Step S703: The base station adds a PDCCH mask indication bit field in the DCI field of the control channel message to notify the UE to switch to a new PDCCH mask.

[0081] The bit length of the PDCCH mask indication bit field is equal to the number of PDCCH masks, and the bit position corresponds to the PDCCH mask list one-to-one; for example, setting a bit to 0 indicates that the corresponding mask is not effective, and setting a bit to 1 indicates that the corresponding mask is effective.

[0082] In this embodiment, the PDCCH mask may be configured to be continuous or discontinuous, and the position may be indicated by a cell-level RB bitmap.

[0083] In step S704, the base station adjusts the PDCCH mask indication according to actual interference or expected interference conditions of the commercial network, and starts a PDCCH mask switching timer when the PDCCH mask indication bit field changes.

[0084] Step S705: After the UE detects a change in the PDCCH mask indication bit field in the DCI through blind detection, it also starts a PDCCH mask switching timer synchronously.

[0085] In this embodiment, the base station and the UE start the PDCCH switching timer synchronously, which can ensure the consistency of the available CORESET resources used by the base station and the UE, even if the base station and the UE use the same available CORESET resources at the same time.

[0086] In this embodiment, before the handover timer expires, the base station and the UE use the PDCCH mask before adjustment; after the handover timer expires, the base station and the UE use the PDCCH mask after adjustment.

[0087] In step S706, the base station and the UE use the CORESET resources after deducting the effective PDCCH mask as available CORESET resources, and calculate a candidate position set within the available CORESET resources based on the number of blind detections and the hash function, wherein the candidate position sets calculated by the base station and the UE are the same.

[0088] In step S707, the base station selects a target location in the candidate location set that does not schedule other UEs to send DCI, and the UE blindly detects all candidate location sets to receive DCI and obtains scheduling information in the DCI.

[0089] The above method dynamically adjusts PDCCH frequency domain resources, ensuring that all candidate location sets are staggered away from interference bands, ensuring reliable PDCCH demodulation and avoiding wasted blind detections. CORESET resource configuration can be configured regardless of interference status, allocating full bandwidth to ensure scheduling capacity in the absence of interference.

[0090] Compared to existing technologies, the method and apparatus described in this disclosure address the issue of DCI transmission avoiding interfering frequency bands through dynamic frequency domain adjustment of PDCCH resources, without incurring significant reconfiguration overhead or reducing the number of available blind detections. When interference is present, the PDCCH resource frequency domain is adjusted to avoid interference, improving PDCCH demodulation reliability. When interference is absent, the PDCCH resource frequency domain is adjusted to the full bandwidth to ensure scheduling capacity. This achieves both reliability and system capacity, resulting in a better network experience.

[0091] To facilitate understanding of the technical solution provided by the present disclosure, the above-mentioned method for dynamically adjusting PDCCH frequency domain resources is described in detail below in conjunction with embodiments of specific scenarios.

[0092] Figure 8 is a schematic diagram of the PDCCH mask configuration in the interference avoidance scenario according to an embodiment of the present disclosure. As shown in Figure 8, affected by other co-frequency networks, there are two potential interference bands in the commercial network, such as interference band 1 and interference band 2. The interference intensity is related to the load of the co-frequency network. Therefore, two PDCCH masks (i.e., mask 1 and mask 2) need to be configured to solve the problem of PDCCH resource allocation avoiding interference bands.

[0093] Based on the above interference scenario, an embodiment of the present disclosure provides a method for dynamically adjusting PDCCH frequency domain resources, the method comprising the following steps:

[0094] In step S1 , the base station configures two PDCCH masks and calculates corresponding PDCCH mask positions according to interference positions.

[0095] In this embodiment, in order to ensure scheduling capacity, the CORESET frequency domain resources configure the entire bandwidth of the carrier.

[0096] In step S2, the base station sends the CORESET resource configuration and two PDCCH mask configurations to the UE.

[0097] In step S3, the base station adds a PDCCH mask indication bit field in the DCI field of the control channel message to notify the UE to switch to a new PDCCH mask.

[0098] The bit length of the PDCCH mask indication bit field is equal to the number of PDCCH masks. The first bit from the left indicates whether mask 1 is effective, the second bit from the left indicates whether mask 2 is effective, and so on. A bit set to 0 indicates that the corresponding mask is not effective, and a bit set to 1 indicates that the corresponding mask is effective. In this embodiment, two PDCCH masks are configured, and the length of the PDCCH mask indication bit field is 2 bits. '00' represents no mask, '10' represents mask 1 is effective, '01' represents mask 2 is effective, and '11' represents both mask 1 and mask 2 are effective.

[0099] In step S4, the base station performs interference detection or interference prediction on the commercial network frequency band. If the interference situation changes, a PDCCH mask indication is made according to the interference situation, and when the PDCCH mask indication bit field changes, a PDCCH mask switching timer is started.

[0100] For example, when a commercial network is initially established, there is no interference in the two interference frequency bands. The candidate position set corresponding to the commercial network frequency band includes four candidate positions, one of which is located in the interference frequency band, that is, the position corresponding to mask 2. Since there is no interference in the interference frequency band at this time, the PDCCH mask indication bit field of the two masks is '00', as shown in Figure 9; after a period of time, when the base station detects that there is high interference in both interference frequency band 1 and interference frequency band 2, the PDCCH mask indication bit field of the two masks is changed from '00' to '11'. At the same time, the base station sends the new PDCCH mask indication to the UE through DCI, starts the PDCCH mask switching timer, and adjusts the position of each candidate position in the candidate position combination. The adjusted candidate position combination is shown in Figure 10.

[0101] Step S5: When the UE blindly detects the DCI and finds that the PDCCH mask indication has changed, the PDCCH mask switching timer is also started synchronously.

[0102] In this embodiment, before the handover timer expires, the base station and the UE use the PDCCH mask before adjustment to calculate the candidate position set; after the handover timer expires, the base station and the UE use the PDCCH mask after adjustment to calculate the candidate position set.

[0103] In step S6, the base station and the UE use the CORESET resources after deducting the effective PDCCH mask as available CORESET resources, and calculate a candidate position set within the available CORESET resources based on the number of blind detections and a Hash function.

[0104] As shown in Figure 9, before the PDCCH mask switching timer expires, the PDCCH mask before adjustment is used to calculate the set of candidate positions, and there is a candidate position in the interference area; as shown in Figure 10, after the switching timer expires, the adjusted PDCCH mask is used, and the CORESET resources in the shaded area are unusable. The candidate position set is calculated based on the remaining available CORESET resources, and all candidate positions are located in the non-interference frequency band.

[0105] The method of dynamically adjusting PDCCH frequency domain resources in this embodiment configures two PDCCH masks based on potential interference. When there is no interference, the PDCCH mask is not effective, and the CORESET resources are full bandwidth. When interference is present, the PDCCH mask is effective, and the available CORESET resources are staggered to avoid interference, ensuring that the candidate set is within the available CORESET resources, thus ensuring the reliability of PDCCH demodulation.

[0106] The disclosed embodiments also provide a method for dynamic frequency domain adjustment of downlink control channel resources. This method involves multiple cells on the base station side and is used to solve the problem of coordinated allocation of PDCCH resources between cells in low-load scenarios. In addition, to ensure scheduling capacity, CORESET resources in this embodiment are also allocated to the entire bandwidth of the carrier.

[0107] FIG11 is a flow chart of a method for dynamically adjusting downlink control channel resources in the frequency domain according to an embodiment of the present disclosure. As shown in FIG11 , the method includes the following steps:

[0108] In step S1101, the cell where the UE (i.e., terminal) is located (hereinafter referred to as the serving cell) divides the CORESET corresponding position (i.e., the frequency domain range) into three equal parts, and calculates the corresponding PDCCH mask according to the three-part CORESET resource position, which are recorded as mask 1, mask 2, and mask 3, as shown in Figure 12.

[0109] Step S1102: There is mode 3 interference in the wireless cellular network. The serving cell will be interfered with by two neighboring cells. The serving cell selects two PDCCH masks from three PDCCH masks according to the cell PCI planning and configures them for the UE. At the same time, each cell (including the serving cell and its neighboring cells) sends the same CORESET resource configuration and PDCCH mask parameter configuration to the UE.

[0110] For example, if the cell PCI mode 3 is equal to 0, the serving cell configures mask 2 and mask 3 to the UE, as shown in Figure 13(a); if the cell PCI mode 3 is equal to 1, the serving cell configures mask 1 and mask 3 to the UE, as shown in Figure 13(b); if the cell PCI mode 3 is equal to 2, the serving cell configures mask 1 and mask 2 to the UE, as shown in Figure 13(c).

[0111] In this embodiment, the same CORESET resources refer to that the control resources configured by the CORESET corresponding to each cell are the same.

[0112] Step S1103: The serving cell adds a PDCCH mask indication bit field in the DCI field of the control channel message to notify the UE to switch to a new PDCCH mask.

[0113] In this embodiment, the base station side configures two PDCCH masks for the UE, and the length of the PDCCH mask indication bit field is 2 bits, which respectively indicate whether the two configured PDCCH masks are effective.

[0114] In step S1104, the serving cell determines whether the corresponding PDCCH mask is effective according to the capacity, and starts the PDCCH mask switching timer when the PDCCH mask indication bit field changes.

[0115] For any cell, when the cell is in a low-load state, the PDCCH mask indicator field for all masked cells in effect is set to '11'. The PDCCH mask configured for all cells is effective, and the cell's available CORESET resources are the total CORESET resources minus the resources at the PDCCH mask position. As shown in Figure 13, due to the different PDCCH mask configurations in different cells, after the PDCCH mask is effective, the available CORESET resources of different cells can be staggered in the frequency domain, reducing mutual interference between PDCCHs and improving PDCCH demodulation reliability.

[0116] When the cell is in a high load state, CORESET resources are prioritized. At this time, the PDCCH mask is not effective and the cell PDCCH mask indication field is filled with '00'. The available CORESET resources of the cell are the total CORESET resources, which can guarantee the cell scheduling capacity.

[0117] Step S1105 , after the UE blindly detects that the PDCCH mask indication bit field in the DCI has changed, it also synchronously starts the PDCCH mask switching timer.

[0118] In step S1106, the serving cell and the UE use the CORESET resources after deducting the effective PDCCH mask as available CORESET resources, and calculate a candidate position set within the available CORESET resources based on the number of blind detections and the hash function, wherein the candidate position sets calculated by the serving cell and the UE are the same.

[0119] Step S1107: The serving cell selects a target location in the candidate location set that does not schedule other UEs to send DCI, and the UE blindly detects all candidate location sets to receive DCI and obtain the scheduling information in the DCI.

[0120] The disclosed embodiments also provide a method for dynamic frequency domain adjustment of downlink control channel resources, which is used to simultaneously solve the problems of coordinated allocation of PDCCH resources between cells and interference avoidance. In addition, to ensure scheduling capacity, CORESET resources in this embodiment are also allocated to the entire bandwidth of the carrier.

[0121] FIG14 is a flow chart of a method for dynamically adjusting downlink control channel resources in the frequency domain according to an embodiment of the present disclosure. As shown in FIG14 , the method includes the following steps:

[0122] In step S1401, the serving cell divides the interference-free CORESET location into three equal parts and calculates the corresponding PDCCH masks based on the three equally divided CORESET resource locations, which are recorded as Mask 1, Mask 2, and Mask 3. Mask 4 and Mask 5 are configured in the potential interference bands (i.e., Interference Band 1 and Interference Band 2), as shown in Figure 15.

[0123] In step S1402, the serving cell selects two masks from mask 1, mask 2, and mask 3 according to the cell PCI planning and configures them to the UE. At the same time, each cell sends mask 4 and mask 5 to all UEs and sends the same CORESET resources to the UE.

[0124] For example, if the cell PCI mode 3 is equal to 0, the cell will configure mask 2 and mask 3 to the UE; if the cell PCI mode 3 is equal to 1, the cell will configure mask 1 and mask 3 to the UE; if the cell PCI mode 3 is equal to 2, the cell will configure mask 1 and mask 2 to the UE.

[0125] In step S1403, the serving cell adds a PDCCH mask indication bit field in the DCI field of the control channel message to notify the UE to switch to a new PDCCH mask.

[0126] In this embodiment, the cell configures four PDCCH masks for the UE, and the length of the PDCCH mask indication bit field is 4 bits, which respectively indicate whether the four configured PDCCH masks are effective.

[0127] Step S1404: The serving cell determines the corresponding PDCCH mask validity state according to the cell capacity and interference status, and starts the PDCCH mask switching timer when the PDCCH mask indication bit field changes.

[0128] For any cell, when the cell is in a low-load state, all masks are enabled, the cell's PDCCH mask indicator field is filled with '1111', and the cell's available CORESET resources are the total CORESET resources minus the resources at the PDCCH mask position. Because different cells have different PDCCH mask configurations, after the PDCCH mask is enabled, the available CORESET resources of different cells can be staggered in the frequency domain, reducing mutual interference between PDCCHs. The operating principles for the effectiveness of PDCCH Masks 4 and 5, and the presence of interfering signals, can be referred to in S701 to S707 of the above embodiment.

[0129] When the cell is in a high-load state, if the cell detects that there is no interference in the potential interference frequency band, the PDCCH mask is not effective, the cell PDCCH mask indication bit field is filled with '0000', and the cell's available CORESET resources are the total CORESET resources, which can ensure the cell scheduling capacity. If the cell detects that there is interference in all potential interference frequency bands, the cell PDCCH mask indication bit field is filled with '0011', and the cell's available CORESET resources are the CORESET resources on the non-interference frequency band.

[0130] Step S1405: After the UE blindly detects that the PDCCH mask indication bit field in the DCI has changed, it also synchronously starts the PDCCH mask switching timer.

[0131] In step S1406, the serving cell and the UE use the CORESET resources after deducting the effective PDCCH mask as available CORESET resources, and calculate a candidate position set within the available CORESET resources based on the number of blind detections and the hash function, wherein the candidate position sets calculated by the serving cell and the UE are the same.

[0132] In step S1407, the serving cell selects a target location in the candidate location set that does not schedule other UEs to send DCI, and the UE blindly detects all candidate location sets to receive DCI and obtain the scheduling information in the DCI.

[0133] Through the above-mentioned method and device disclosed in the present invention, through the downlink control channel frequency domain dynamic adjustment method, the available CORESET resources can be dynamically adjusted according to the actual spectrum interference or interference expectation, so that PDCCH resource allocation can avoid the interference location and avoid the waste of blind detection times, effectively improving the PDCCH demodulation reliability and ensuring the cell scheduling capacity.

[0134] An embodiment of the present disclosure further provides a computer-readable storage medium, in which a computer program is stored. The computer program is configured to execute the steps of any one of the above method embodiments when run.

[0135] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.

[0136] An embodiment of the present disclosure further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0137] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0138] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail here.

[0139] Obviously, those skilled in the art should understand that the modules or steps of the present disclosure described above can be implemented using a general-purpose computing device, they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices, they can be implemented using program code executable by the computing device, and thus, they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be performed in a different order than herein, or they can be fabricated into separate integrated circuit modules, or multiple modules or steps can be fabricated into a single integrated circuit module for implementation. Thus, the present disclosure is not limited to any particular combination of hardware and software.

[0140] The foregoing description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A method for configuring PDCCH frequency domain resources, comprising: Adjusting the states of a plurality of pre-set PDCCH masks when the physical downlink control channel PDCCH mask state switching condition is satisfied, wherein the states of the plurality of PDCCH masks include an active state and a non-active state; Determining available control resources according to the states of the plurality of PDCCH masks, and determining a candidate position set for transmitting downlink control information DCI based on the available control resources.

2. The method according to claim 1, wherein The available control resources are: other control resources in the control resource set corresponding to the physical downlink control channel PDCCH except for the control resources corresponding to the PDCCH masks in the active state.

3. The method according to claim 1, wherein, Before adjusting the states of the plurality of pre-set PDCCH masks, the method further comprises: Sending a control channel message to a terminal, wherein a DCI field of the control channel message includes a PDCCH mask indication bit field, and the indication bit field is used to indicate the state of the PDCCH mask.

4. The method according to claim 1, wherein The PDCCH mask state switching condition includes at least one of the following: detecting an interfering network, and the service cell load state switching.

5. The method according to claim 4, wherein, When the PDCCH mask state switching condition is detecting an interfering network, before adjusting the states of the plurality of pre-set PDCCH masks, the method further comprises: Setting the plurality of PDCCH masks for the control resource set according to a potential interfering network, wherein the number of the PDCCH masks is equal to the number of interfering frequency bands of the potential interfering network, and the positions of the PDCCH masks correspond to the interfering positions of the interfering network; Sending at least one of the following information to the terminal through RRC signaling: the number of the PDCCH masks, the positions of the PDCCH masks, the configuration information of the control resource set, and the number of blind detections that the terminal needs to perform.

6. The method according to claim 5, wherein Adjusting the states of the plurality of pre-set PDCCH masks includes: Starting a PDCCH mask switching timer, and adjusting the state of the PDCCH mask corresponding to the actual interfering network to the active state at a first preset moment.

7. The method according to claim 4, wherein When the PDCCH mask state switching condition is the service cell load state switching, before adjusting the states of the plurality of pre-set PDCCH masks, the method further comprises: Setting the plurality of PDCCH masks for the control resource set within the frequency domain range according to the frequency domain range of the carrier where the control resource set is located, wherein the control resource set is the control resource set of the service cell or any adjacent cell of the service cell, and the configurations of the control resource sets of the service cell and the any adjacent cell are the same; Based on the set plurality of PDCCH masks, sending at least one of the following information to the terminal through RRC signaling: the configuration of the control resource set, the number of the PDCCH masks corresponding to the service cell, the positions of the PDCCH masks, and the number of blind detections that the terminal needs to perform.

8. The method according to claim 7, wherein, Adjusting the states of the plurality of pre-set PDCCH masks includes: When the serving cell is in a low load state, start the PDCCH mask switching timer, and at a second preset moment, adjust the state of the PDCCH mask of the serving cell to the effective state.

9. The method according to claim 4, wherein When detecting an interfering network and a load state switch of the serving cell, the control resource set includes a first part of the control resource set and a second part of the control resource set. Before adjusting the states of a plurality of pre-set PDCCH masks, the method further includes: For the first part of the control resource set whose frequency domain range corresponds to the interfering network frequency band, set a plurality of first PDCCH masks for the first part of the control resource set according to the potential interfering network, where the number of the first PDCCH masks is equal to the number of interfering frequency bands of the potential interfering network, and the positions of the first PDCCH masks correspond to the interfering positions of the potential interfering network; For the second part of the control resource set whose frequency domain range does not correspond to the interfering network frequency band, set a plurality of second PDCCH masks for the second part of the control resource set within the frequency domain range according to the frequency domain range of the second part of the control resource set, where the control resource set is the control resource set of the serving cell or any adjacent cell of the serving cell, and the configurations of the control resource sets of the serving cell and the any adjacent cell are the same.

10. The method according to claim 9, wherein, The method further includes: Based on the set plurality of first PDCCH masks and the plurality of second PDCCH masks, send at least one of the following information to the terminal through RRC signaling: the configuration of the control resource set, the number of the first PDCCH masks corresponding to the serving cell, the number of the second PDCCH masks, the positions of the first PDCCH masks, the number of the second PDCCH masks, and the number of blind detections that the terminal needs to perform.

11. The method according to claim 9, wherein, Adjusting the states of a plurality of pre-set PDCCH masks includes at least one of the following: When detecting the interfering network, start the PDCCH mask switching timer, and according to the actual interfering network, at a third preset moment, adjust the state of the first PDCCH mask corresponding to the actual interfering network to the effective state; When the serving cell is in a low load state, start the PDCCH mask switching timer, and at a fourth preset moment, adjust the state of the second PDCCH mask of the serving cell to the effective state.

12. According to the method described in any one of claims 5, 7, and 10, wherein, After configuring the PDCCH frequency domain resources based on the available control resources, the method further includes: Determine the candidate position set according to the available control resources and the number of blind detections; Select a target position from the candidate position set, and send downlink control information at the target position, where the target position is any position that is not currently used for scheduling the terminal.

13. A method for configuring PDCCH frequency domain resources, including: Determine the states of each physical downlink control channel PDCCH mask according to the detected control channel message, where the states of the PDCCH mask include: effective state and non-effective state; Determine available control resources according to the status of the PDCCH mask, and determine a set of candidate positions for transmitting downlink control information (DCI) based on the available control resources.

14. The method according to claim 13, wherein, The DCI field of the control channel message carries a PDCCH mask indication bit field, and the indication bit field is used to indicate the status of the PDCCH mask.

15. The method according to claim 13, wherein Determining available control resources according to the status of the PDCCH mask includes: According to the control channel message, when it is detected that the status of the PDCCH mask changes, start a PDCCH mask switching timer; Before the PDCCH mask switching timer expires, determine the available control resources from the control resource set according to the PDCCH mask in the original effective state; After the PDCCH mask switching timer expires, determine the available control resources from the control resource set according to the PDCCH mask in the effective state indicated by the control channel message.

16. The method according to claim 13, wherein, After determining the set of candidate positions based on the available control resources, the method further includes: Monitor all candidate positions in the set of candidate positions to receive downlink control information carrying scheduling information.

17. A PDCCH frequency domain resource configuration device includes: An adjustment module, configured to adjust the status of a plurality of pre-set PDCCH masks when the condition for switching the status of the physical downlink control channel (PDCCH) mask is met, where the status of the plurality of PDCCH masks includes: an effective state and a non-effective state; A configuration module, configured to determine available control resources according to the status of the plurality of PDCCH masks, and determine a set of candidate positions based on the available control resources.

18. A PDCCH frequency domain resource configuration device includes: A detection module, configured to determine the status of each physical downlink control channel (PDCCH) mask according to the detected control channel message, where the status of the PDCCH mask includes: an effective state and a non-effective state; A determination module, configured to determine available control resources according to the status of the PDCCH mask, and determine a set of candidate positions based on the available control resources.

19. A computer-readable storage medium storing a computer program therein, wherein, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 12, or implements the steps of the method described in any one of claims 13 to 16.

20. An electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method described in any one of claims 1 to 12, or implements the steps of the method described in any one of claims 13 to 16.

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