CN113473603A

CN113473603A - Method for monitoring PDCCH (physical Downlink control channel), method and equipment for indicating monitoring of PDCCH

Info

Publication number: CN113473603A
Application number: CN202010238955.6A
Authority: CN
Inventors: 吴凯; 潘学明; 李�根
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-10-01

Abstract

The embodiment of the invention provides a method for monitoring a PDCCH (physical downlink control channel), a method for indicating to monitor the PDCCH and equipment, wherein the method comprises the following steps: determining a first Search Space Set, wherein the first Search Space Set is a Search Space Set for the terminal to monitor a PDCCH; and determining whether to monitor the PDCCH in the terminal-specific Search Space USS according to the first Search Space Set. In the embodiment of the invention, the terminal can be prevented from discarding PDCCH monitoring in part of USSs, and the reliability of the communication system is improved.

Description

Method for monitoring PDCCH (physical Downlink control channel), method and equipment for indicating monitoring of PDCCH

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method for monitoring a Physical Downlink Control Channel (PDCCH), a method for indicating and monitoring the PDCCH and equipment.

Background

In the prior art, a terminal (User Equipment, UE) has a corresponding PDCCH detection capability in each serving cell (serving cell), that is, the number of PDCCH candidates (candidates) that can be detected in one slot and the number of Control Channel Elements (CCEs) that do not overlap. If the detected number of PDCCHs configured in a slot network is greater than the capability of the UE, the UE needs to discard monitoring of PDCCHs in one or more USSs according to a dropping rule (dropping rule), for example, discarding monitoring of PDCCHs in one or more USSs according to the size of an index value (or called number) of a UE-specific search space (USS).

In the prior art, a network may instruct a UE to perform dynamic handover of a Search Space Set (Search Space Set) through a PDCCH, that is, the network configures a plurality of Search Space sets through high-level signaling, then divides the plurality of Search Space sets into a plurality of Search Space Set groups (Search Space Set groups), and instructs the UE to monitor the PDCCH by using the configuration of which Search Space Set group. The PDCCH may be a group common PDCCH, or other PDCCH, including any PDCCH. In addition to triggering the UE to perform the handover of the search space set through the PDCCH, another method is to trigger the handover through a Timer (Timer), that is, monitoring the PDCCH using the configuration of one search space set group during the running period of the Timer, and monitoring the PDCCH using the configuration of another search space set group after the Timer expires.

In the prior art, the UE discards PDCCH monitoring according to a discarding rule according to all search space sets configured by the network on the activated downlink bandwidth Part (BWP). After introducing the dynamic switching of the search space set, the UE may monitor only PDCCHs corresponding to a part of the search space set. However, when performing dynamic switching of the search space set, if the PDCCH monitoring is also discarded according to the above discarding rule, the UE may unnecessarily discard part of PDCCH monitoring in the USS.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method for monitoring a PDCCH, a method for indicating to monitor the PDCCH, and a device, which solve the problem that a terminal discards part of PDCCH monitoring in a USS.

In a first aspect, an embodiment of the present invention provides a method for monitoring a PDCCH, which is applied to a terminal, and includes:

determining a first Search Space Set (Search Space Set), wherein the first Search Space Set is a Search Space Set for the terminal to monitor a PDCCH;

and determining whether to monitor the PDCCH in the terminal-specific Search Space USS according to the first Search Space Set.

In a second aspect, an embodiment of the present invention further provides a method for indicating to monitor a PDCCH, which is applied to a network device, and includes:

and sending a first signaling to a terminal, wherein the first signaling indicates the terminal to determine whether to monitor the PDCCH in the USS according to the monitored Search Space Set, or indicates the terminal to determine whether to monitor the PDCCH in the USS according to all the configured Search Space sets on the activated downlink BWP.

In a third aspect, an embodiment of the present invention further provides a terminal, including:

a first determining module, configured to determine a first Search Space Set, where the first Search Space Set is a Search Space Set for the terminal to perform PDCCH monitoring;

and the second determining module is used for determining whether to monitor the PDCCH in the terminal-specific Search Space USS according to the first Search Space Set.

In a fourth aspect, an embodiment of the present invention further provides a network device, including:

and the sending module is used for sending a first signaling to the terminal, wherein the first signaling indicates the terminal to determine whether to monitor the PDCCH in the USS according to the monitored Search Space Set, or indicates the terminal to determine whether to monitor the PDCCH in the USS according to all the configured Search Space sets on the activated downlink BWP.

In a fifth aspect, an embodiment of the present invention further provides a communication device, including: a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the method of monitoring PDCCH according to the first aspect; alternatively, the steps of the method of monitoring PDCCH are indicated as described in the second aspect.

In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the method for monitoring a PDCCH according to the first aspect; alternatively, the steps of the method of monitoring PDCCH are indicated as described in the second aspect.

In the embodiment of the invention, the terminal can be prevented from discarding PDCCH monitoring in part of USSs, and the reliability of the communication system is improved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings.

In the drawings:

FIG. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;

fig. 2 is a diagram illustrating a method for monitoring a PDCCH according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for indicating monitoring of a PDCCH according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a network device according to an embodiment of the invention;

fig. 6 is a schematic diagram of a communication device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.

The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.

Embodiments of the present invention are described below with reference to the accompanying drawings. The method for monitoring the PDCCH, the method for indicating to monitor the PDCCH and the equipment provided by the embodiment of the invention can be applied to a wireless communication system. Referring to fig. 1, an architecture diagram of a wireless communication system according to an embodiment of the present invention is shown. As shown in fig. 1, the wireless communication system may include: network device 11 and terminal 12, terminal 12 may be referred to as UE12, and terminal 12 may communicate (transmit signaling or transmit data) with network device 11. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 illustrates the connections between the devices by solid lines for convenience and convenience in visual representation.

The network device 11 provided in the embodiment of the present invention may be a base station, which may be a commonly used base station, an evolved node base station (eNB), or a network device in a 5G system (e.g., a next generation base station (gNB) or a Transmission and Reception Point (TRP)).

The terminal 12 provided in the embodiment of the present invention may be a Mobile phone, a tablet Computer, a notebook Computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device.

Referring to fig. 2, an embodiment of the present invention provides a method for monitoring a PDCCH, where an execution subject of the method is a terminal, and the method includes: step 201 and step 202.

Step 201: determining a first Search Space Set, wherein the first Search Space Set is a Search Space Set for the terminal to monitor a PDCCH;

it can be understood that the first Search Space Set is the Search Space Set for which the terminal actually performs PDCCH monitoring.

Step 202: and determining whether to monitor a PDCCH in a UE-specific Search Space (USS) according to the first Search Space Set.

In the embodiment of the present invention, the terminal determines whether to monitor the PDCCH in the USS according to the configuration of the first Search Space Set and the blind detection capability of the UE on the serving cell (serving cell), so that the PDCCH monitoring in the USS can be avoided being discarded, and the reliability of the communication system is improved.

In this embodiment of the present invention, the UE may determine whether to monitor the PDCCH in the USS according to the PDCCH blind detection capability (or PDCCH detection capability) of the UE on the serving cell and the monitoring parameter for the handover of the Search Space Set. The blind detection capability is the maximum PDCCH candidate number detected by the UE and the non-overlapping CCE number detected by the UE.

It can be understood that, if the terminal preferentially monitors the PDCCH of the CSS, and if the blind detection capability of the UE on the serving cell can still be used for monitoring the PDCCH corresponding to the Search Space Set in the USS when the PDCCH monitoring of the CSS is completed, the UE monitors the PDCCH corresponding to the USS; otherwise, not monitoring the PDCCH corresponding to the USS.

It is to be understood that the serving Cell may be at least one of a Primary serving Cell (PCell), a Primary serving Cell (PScell) of a Secondary Cell group, and a Secondary Cell (Scell).

In some embodiments, the first Search Space Set comprises one of:

(1) a Search Space Set configured with one or more Search Space Set group (Search Space Set group) identifiers;

that is, the first Search Space Set belongs to one or more Search Space Set groups.

It is to be understood that the search space set group identification is not specifically limited in the embodiment of the present invention.

(2) A Search Space Set indicated by the PDCCH;

for example, the PDCCH indicates a Search Space Set group, where the Search Space Set group includes at least one Search Space Set, and equivalently, the PDCCH indicates that all the Search Space sets in the Search Space Set group are the first Search Space Set.

(3) A Search Space Set determined by a state of a PDCCH switching Timer (Timer);

for example, one Set of Search Space Set used during the running of the Timer is the first Search Space Set, and another Set of Search Space Set used after the Timer expires is the first Search Space Set.

It is to be understood that the parameters of the timer (or referred to as timer) are not particularly limited in the embodiments of the present invention. The timer may be a timer defined or configured for the Search Space Set group switching, or other timers, such as a discontinuous reception duration timer (drxonductivitettimer), a DRX inactivity timer (drxinactytimer), a random access contention resolution timer (ra-ContentionResolutionTimer), a beam failure recovery timer (beamFailureRecoveryTimer), a configuration granted timer (configuredtime), an uplink scheduling prohibit timer (sr-ProhibitTimer), a partial bandwidth deactivation timer (bwp-inactivetytimer), a data deactivation timer (datainactivettimer), a secondary cell deactivation timer (sldeiactivanttimer), a downlink retransmission DRX timer (DRX-retransmission rdl), an uplink retransmission DRX timer (ul-retransmission).

(4) A Search Space Set in a default Search Space Set group;

in the embodiment of the present invention, the default Search Space Set group may be a predefined Search Space Set group or a network-indicated Search Space Set group. .

(5) Search Space Set of group ID is not configured.

It can be understood that the network may configure that part of the Search Space Set does not belong to any Search Space Set group, that is, does not configure a Search Space Set group ID (Search Space Set group ID) for the Search Space Set, and the UE needs to perform PDCCH monitoring according to the configuration of the Search Space Set, and is not affected by information indication in the PDCCH, whether the PDCCH is detected or not, and is not affected by the operation of the Timer. For example, Common Search Spaces (CSSs) of Type0/0A/1/2 (Type0/0A/1/2) do not belong to any Search Space Set group, i.e., SS Set group ID is not configured, and Search Space Set group ID can be configured by CSSs and USSs of Type 3, which do not belong to network configuration.

In some embodiments, the step 202 can be implemented by the following manner 1, manner 2 and manner 3.

Mode 1: determining whether to monitor a PDCCH in a Common Search Space (CSS) in a first Search Space Set according to the number of PDCCH candidates (candidates) and the number of non-overlapping Control Channel Elements (CCEs);

mode 2: and determining whether to monitor the PDCCH in the USS or not according to the PDCCH candidate number in the USS in the first Search Space Set and the number of non-overlapping CCEs.

Mode 3: and determining whether to monitor the PDCCH in the USS or not according to the PDCCH candidate number of the CSS in the first Search Space Set and the number of non-overlapping CCEs, and the PDCCH candidate number of the USS in the first Search Space Set and the number of non-overlapping CCEs.

In the above-mentioned mode 1 to mode 3, if the blind detection capability of the UE on the serving cell can still be used for monitoring the PDCCH corresponding to the Search Space Set in the USS, the UE monitors the PDCCH corresponding to the USS; otherwise, not monitoring the PDCCH corresponding to the USS.

Optionally, on the basis of the above mode 1 and mode 3, the method further includes: determining the number of PDCCH candidates of the CSS and the number of non-overlapping CCEs in the first Search Space Set.

Optionally, the method further comprises: determining a first number according to the maximum PDCCH candidate number and the maximum number of non-overlapping CCEs of the terminal (e.g. monitoring in a first time resource), and the PDCCH candidate number and the number of non-overlapping CCEs of the CSS in the first Search Space Set (e.g. monitoring in the first time resource)

And a second number

Wherein the first number

Equal to the difference between the maximum PDCCH candidate number and the PDCCH candidate number of the CSS;

the second number

Equal to the difference between the maximum number of non-overlapping CCEs and the number of non-overlapping CCEs of the CSS;

the first time resource is a slot (slot) or a plurality of consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols, that is, a resource within a time span.

Further, whether the third number M is less than or equal to the first number is judged in sequence according to the first sequence determined by the first index value

And whether the fourth number C is less than or equal to the second number

Determining whether to monitor a PDCCH in the USS corresponding to the first index value according to a judgment result;

wherein the third number M is the PDCCH candidate number of the USS corresponding to the first index value; the fourth number C is the number of non-overlapping CCEs of the USS corresponding to the first index value; the first index value is an index value of a Search Space Set in the USS, and the first order represents an order of judging whether the PDCCH in the USS needs to be monitored.

It can be understood that the first order is an order in which the UE determines whether the USS is to be detected before performing the PDCCH detection operation. The UE determines the USS to be detected according to the first sequence, and then the sequence in which the UE performs PDCCH detection is not specifically limited.

Optionally, the index value of the Search Space Set in the USS is an index value of the USS in a Search Space Set group in which the terminal performs PDCCH monitoring.

In some embodiments, M is less than or equal to the first number in the third number

And the fourth number C is less than or equal to the second number

In this case, the method further comprises:

according to the third number M to the first number

Making an adjustment, and applying the second number according to the fourth number C

Make an adjustment, i.e.

In some embodiments, the determining whether to monitor the PDCCH in the USS according to the determination result includes:

when the third number M is greater than the first number

And/or said fourth number C is greater than said second number

If the index value of the first USS is greater than or equal to the first index value, determining not to monitor the PDCCH in the first USS;

alternatively, the first and second electrodes may be,

when the third number M is less than or equal to the first number

The fourth number C is less than or equal to the second number

And under the condition of (1), monitoring the PDCCH in the USS corresponding to the first index value.

In some embodiments, the first order comprises one of:

(1) according to the sequence of the index values of the Search Space Set in the USS from small to large;

(2) and according to a preset reordering rule, reordering the index values of the Search Space Set in the USS.

Further, the preset reordering rule is configured based on the number of Search Space Set groups to which the Search Space Set belongs corresponding to the index value of the Search Space Set in the USS.

Optionally, the preset reordering rule comprises one of:

(1) the arrangement order of the index values of the Search Space Set of the first type is before the arrangement order of the index values of the Search Space Set of the second type;

(2) the index value of the second type of Search Space Set precedes the arrangement order of the index values of the first type of Search Space Set;

wherein the first type of Search Space Set is a Search Space Set that does not belong to any Search Space Set group, and the second type of Search Space Set is a Search Space Set that belongs to at least one Search Space Set group; or, the first type of Search Space Set is a Search Space Set belonging to a first number of Search Space Set groups, the second type of Search Space Set is an index value of a Search Space Set belonging to a second number of Search Space Set groups, and the first number is greater than the second number or the second number is greater than the first number.

In some embodiments, if the number of the index values of the first type of Search Space Set is greater than 1, the index values of the first type of Search Space Set are sorted by the size of the index values;

or, if the number of the index values of the Search Space Set of the second class is greater than 1, the index values of the Search Space Set of the second class are arranged according to the size of the index values, for example, the index values are sorted from small to large.

In some embodiments, the method further comprises:

and reporting a first capability to a network side, wherein the first capability represents that the terminal has the capability of determining whether to monitor the PDCCH in the USS according to the monitored (actually monitored) Search Space Set.

In some embodiments, the method further comprises:

receiving a first signaling from a network side, where the first signaling instructs the terminal to determine whether to monitor a PDCCH in the USS according to a Search Space Set monitored (actually monitored), or instructs the terminal to determine whether to monitor the PDCCH in the USS according to all the Search Space sets configured on a Band Width Part (BWP) activated downlink bandwidth Part (BWP).

Wherein all configured Search Space sets may include all Search Space sets currently activating DL BWP.

In some embodiments, the step of determining whether to monitor the PDCCH in the USS according to the first Search Space Set is performed when the PDCCH for performing Search Space Set group handover is received or when a timer corresponding to the current Search Space Set group expires.

Referring to fig. 3, an embodiment of the present invention further provides a method for indicating monitoring of a PDCCH, where an execution subject of the method is a network device, and the method includes: step 301.

Step 301: and sending a first signaling to a terminal, wherein the first signaling indicates the terminal to determine whether to monitor the PDCCH in the USS according to the Search Space Set monitored (actually monitored), or indicates the terminal to determine whether to monitor the PDCCH in the USS according to all the Search Space sets configured on the activated downlink BWP.

In some embodiments, the method further comprises: receiving a first capability from a terminal, the first capability indicating that the terminal has a capability of determining whether to monitor a PDCCH in a USS according to a monitored (actual monitored) Search Space Set.

In the embodiment of the invention, the terminal is prevented from discarding PDCCH monitoring in part of USSs, and the reliability of the communication system is improved.

The following description is made with reference to the first embodiment, the second embodiment, and the third embodiment.

The first embodiment is as follows:

the UE determines whether the PDCCH in the USS needs to be monitored, and may determine according to a Search Space Set (for example, according to configuration of the Search Space Set) currently performing PDCCH monitoring (actually performing PDCCH monitoring).

The UE preferentially monitors the PDCCH of the CSS, and if the blind detection capability of the UE on a serving cell (serving cell) can be used for monitoring the PDCCH corresponding to the Search Space Set in the USS when the PDCCH monitoring of the CSS is completed, the UE monitors the PDCCH in the USS.

It can be understood that the blind detection capability of the UE on the serving cell includes two aspects, the number of detected PDCCH candidates and the number of non-overlapping CCEs.

Due to the handover of the Search Space Set group, the UE will not monitor all the Search Space sets configured by the network, and will only monitor the Search Space sets (also referred to as SS sets) in part of the Search Space Set group. Since the UE preferentially detects the PDCCH of the CSS, the UE needs to calculate the PDCCH candidate number and the non-overlapping CCE number required for monitoring the CSS in each slot or unit time according to the Search Space Set for monitoring (actual monitoring); based on this, it is determined whether the PDCCH monitoring in the USS exceeds the maximum value of the serving cell. And if the index value exceeds the maximum value, not performing PDCCH monitoring in the USS, and not performing PDCCH monitoring in the USS with a larger subsequent index value. Otherwise, monitoring the PDCCH in the USS and confirming whether the PDCCH in the next USS is monitored.

For example, the UE sequentially confirms the total PDCCH candidate number and the non-overlapping CCE number from small to large according to the index value (or called number) order of the Search Space Set of the USS.

Under the condition of combining the Search Space Set group switching, a network can configure that a certain USS does not belong to any Search Space Set group, namely that the UE monitors the PDCCH corresponding to the USS and is not influenced by PDCCH detection or a timer, and always needs to monitor, the UE preferentially allocates the PDCCH detection capability to the PDCCHs in the USSs, preferentially confirms whether the PDCCHs in the USSs monitor or not when confirming the PDCCHs in the USSs, and the priority level of the ID configured with the Search Space Set group is back;

or, different judgment orders may also be used to determine whether to monitor the PDCCH in the USS, for example, the Search Space Set is reordered first, the USS that does not belong to any Search Space Set group is ranked earlier, and the USS that belongs to at least one Search Space Set group is judged to be ranked later; or, the opposite ordering manner is adopted, for example, if the network indicates that it needs to switch to monitoring using the Search Space Set group, it is considered that the priority of the PDCCH in the Search Space Set group is higher, and the judgment order of the corresponding USS is earlier.

Alternatively, if there are a plurality of USSs that do not belong to any Search Space Set, the determination order between these USSs may be sorted in the order of the size of the index value, for example, sorted in the order of the size of the index value; or if there are multiple USSs belonging to a certain Search Space Set group, the determination order among the USSs may be sorted according to the order of the index values from small to large.

And for the reordered USS, sequentially judging whether the PDCCH monitoring in the USS exceeds the maximum value of the serving cell.

And if the index value exceeds the maximum value, not performing PDCCH monitoring corresponding to the USS, and not performing PDCCH monitoring on the USS with a larger subsequent index value. Otherwise, monitoring the PDCCH in the USS and confirming whether the PDCCH in the next USS is monitored.

In addition, since the network may configure one USS to belong to a plurality of Search Space Set groups, for example, the network configures 2 Search Space Set groups, and a USS simultaneously belongs to two Search Space Set groups. Thus, the USS is also the USS that always needs to perform PDCCH monitoring, and the similar method can be adopted to perform judgment order reordering. The UE preferentially allocates the PDCCH detection capability to the PDCCHs in the USSs belonging to the plurality of Search Space Set groups, preferentially confirms whether the PDCCHs in the USSs monitor or not when confirming the PDCCHs in the USSs, and judges the USSs belonging to the less Search Space Set groups to have a later sequence.

Alternatively, the Search Space Set may be reordered such that the USS belonging to a larger number of Search Space Set groups is judged earlier and the USS belonging to a smaller number of Search Space Set groups is judged later. Or, the opposite ordering manner is adopted, for example, if the network indicates that switching to monitoring using the Search Space Set group is required, the determination order of the PDCCHs in the Search Space Set group is considered to be earlier.

Alternatively, if there are multiple USSs belonging to the same number of Search Space Set groups, the determination order among the USSs is sorted in the order of the size of the index value, for example, sorted from small to large; and confirming whether the PDCCH monitoring in the USS exceeds the maximum value of the serving cell according to the judgment sequence for the reordered USS.

Alternatively, the UE may determine whether the PDCCH of the USS is monitored based on the determined Search Space Set group. For example, the UE always determines whether the USS listens according to a certain Search Space Set group, for example, the UE determines according to the smallest Search Space Set group ID, or the largest Search Space Set group ID, or the Search Space Set group is configured by the network side. Preferably, only CSS in the Search Space Set group may be considered.

It will be appreciated that the above embodiments may be determined within a slot, or performed within the duration (span) of a time unit.

In addition to directly indicating whether a Search Space Set in a certain Search Space Set group monitors through the PDCCH, the network may determine whether the Search Space Set monitors by indicating whether a segment of resources is available.

For example, the network may indicate, through the PDCCH, whether a configured Resource Block (RB) Set is available to indicate whether the terminal monitors a Search Space Set configured on the RB Set. This method is currently applied to unlicensed access networks, and if the network does not obtain a channel corresponding to a certain RB set, the RB set (RB set) is indicated to be unavailable through the PDCCH. Meanwhile, in an unlicensed network, the Search Space Set may configure a frequency location, and if the Search Space Set is indicated as unavailable by the network in the corresponding RB Set, the terminal may determine whether the PDCCH of the USS monitors using the same method as described above.

It is to be understood that, in the first embodiment, the order determined according to the index value of the Search Space Set in the USS is an order in which whether the USS is to be detected is determined before the UE performs the PDCCH detection operation. After the UE determines the USS to be detected according to the above criteria, the PDCCH detection may be actually performed according to any order, that is, the order of PDCCH detection in the embodiment of the present invention is not specifically limited.

Example two

On the basis of the first embodiment, the terminal may report the first capability to the network side, where the first capability indicates that the terminal has a capability of determining whether to monitor the PDCCH in the USS according to the Search Space Set for monitoring (actual monitoring).

EXAMPLE III

On the basis of the first and second embodiments, the network side may configure the terminal to determine whether to monitor the PDCCH in the USS according to the actually monitored Search Space Set, or determine whether to monitor the PDCCH in the USS according to all the configured Search Space sets on the activated downlink BWP.

Referring to fig. 4, an embodiment of the present invention further provides a terminal, where the terminal 400 includes:

a first determining module 401, configured to determine a first Search Space Set, where the first Search Space Set is a Search Space Set for the terminal to perform PDCCH monitoring;

a second determining module 402, configured to determine whether to monitor a PDCCH in the USS according to the first Search Space Set.

In some embodiments, the first Search Space Set comprises one of: (1) configuring a Search Space Set identified by one or more Search Space Set group; (2) a Search Space Set indicated by the PDCCH; (3) a Search Space Set determined by the state of the PDCCH switch timer; (4) a Search Space Set in a default Search Space Set group; (5) the Search Space Set of the group identity is not configured.

In some embodiments, the second determining module 402 is further configured to: determining whether to monitor the PDCCH in the USS according to the PDCCH candidate number of the common Search Space CSS in the first Search Space Set and the number of non-overlapping Control Channel Elements (CCEs); and/or determining whether to monitor the PDCCH in the USS according to the PDCCH candidate number in the USS in the first Search Space Set and the non-overlapping CCE number.

In some embodiments, the first determining module 401 is further configured to: determining the number of PDCCH candidates of the CSS and the number of non-overlapping CCEs in the first Search Space Set.

In some embodiments, the first determining module 401 is further configured to: determining a first number and a second number according to the maximum PDCCH candidate number and the maximum number of non-overlapping CCEs of the terminal, and the PDCCH candidate number and the number of non-overlapping CCEs of the CSS in the first Search Space Set; the first number is equal to a difference between the maximum PDCCH candidate number and a PDCCH candidate number of the CSS; the second number is equal to a difference between the maximum number of non-overlapping CCEs and the number of non-overlapping CCEs of the CSS.

In some embodiments, the second determining module 402 is further configured to: sequentially judging whether the third number is less than or equal to the first number and whether the fourth number is less than or equal to the second number according to a first sequence determined by the first index value; determining whether to monitor a PDCCH in the USS corresponding to the first index value according to a judgment result; wherein the third number is the PDCCH candidate number of the USS corresponding to the first index value, and the fourth number is the non-overlapping CCE number of the USS corresponding to the first index value; the first index value is an index value of a Search Space Set in the USS, and the first order represents a determination order for determining whether the PDCCH in the USS needs to be monitored.

In some embodiments, the index value of the Search Space Set in the USS is an index value of the USS in a Search Space Set group in which the terminal performs PDCCH monitoring.

In some embodiments, the terminal 400 further comprises:

an adjusting module, configured to adjust the first number according to the third number and adjust the second number according to the fourth number if the third number is less than or equal to the first number and the fourth number is less than or equal to the second number.

In some embodiments, the second determining module 402 is further configured to: if the third number is greater than the first number and/or the fourth number is greater than the second number, determining not to monitor the PDCCH in the first USS if the index value of the first USS is greater than or equal to the first index value;

alternatively, the first and second electrodes may be,

and monitoring the PDCCH in the USS corresponding to the first index value under the condition that the third number is less than or equal to the first number and the fourth number is less than or equal to the second number.

In some embodiments, the first order comprises one of:

In some embodiments, the preset reordering rule is configured based on the number of Search Space Set groups to which the Search Space Set belongs corresponding to the index value of the Search Space Set in the USS.

In some embodiments, the preset reordering rules comprise one of:

wherein the first type of Search Space Set is a Search Space Set that does not belong to any Search Space Set group, and the second type of Search Space Set is a Search Space Set that belongs to at least one Search Space Set group;

alternatively, the first and second electrodes may be,

the Search Space Set of the first type is the Search Space Set belonging to the Search Space Set group of the first quantity, the Search Space Set of the second type is the index value of the Search Space Set belonging to the Search Space Set group of the second quantity, and the first quantity is greater than the second quantity, or the second quantity is greater than the first quantity.

or, if the number of the index values of the second type of Search Space Set is greater than 1, the index values of the second type of Search Space Set are arranged in order according to the size of the index values.

In some embodiments, the terminal 400 further comprises:

a first sending module, configured to report a first capability to a network side, where the first capability indicates that the terminal has a capability of determining whether to monitor a PDCCH in the USS according to a Search Space Set for monitoring (actual monitoring).

In some embodiments, the terminal 400 further comprises:

a first receiving module, configured to receive a first signaling from a network side, where the first signaling indicates the terminal to determine whether to monitor a PDCCH in the USS according to the monitored Search Space Set, or indicates the terminal to determine whether to monitor the PDCCH in the USS according to all the configured Search Space sets on an activated downlink BWP.

In some embodiments, when a PDCCH for performing a Search Space Set group handover is received, or when a timer corresponding to a current Search Space Set group expires, the triggering determination module executes the determining module to determine whether to monitor the PDCCH in the USS according to the first Search Space Set.

The terminal provided in the embodiment of the present invention may execute the method embodiment shown in fig. 2, which has similar implementation principles and technical effects, and this embodiment is not described herein again.

Referring to fig. 5, an embodiment of the present invention further provides a network device, where the network device 500 includes:

a second sending module 501, configured to send a first signaling to a terminal, where the first signaling indicates that the terminal determines whether to monitor a PDCCH in the USS according to the monitored Search Space Set, or indicates that the terminal determines whether to monitor the PDCCH in the USS according to all the configured Search Space sets on the activated downlink BWP.

In this embodiment of the present invention, the network device 500 further includes:

a second receiving module, configured to receive a first capability from a terminal, where the first capability indicates that the terminal has a capability of determining whether to monitor a PDCCH in the USS according to a monitored Search Space Set.

Referring to fig. 6, fig. 6 is a structural diagram of a communication device applied in the embodiment of the present invention, and as shown in fig. 6, the communication device 600 includes: a processor 601, a transceiver 602, a memory 603, and a bus interface, wherein:

in one embodiment of the present invention, the communication device 600 further comprises: a computer program stored in the memory 603 and executable on the processor 601, the computer program implementing the steps in the embodiments shown in fig. 2 or fig. 3 when executed by the processor 601.

In fig. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 602 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium, it being understood that the transceiver 602 is an optional component.

The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 601 in performing operations.

The communication device provided in the embodiment of the present invention may execute the method embodiment shown in fig. 2 or fig. 3, which implements similar principles and technical effects, and this embodiment is not described herein again.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable hard disk, a compact disc Read Only Memory (cd-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. A method for monitoring a physical downlink control channel is applied to a terminal, and is characterized by comprising the following steps:

determining a first search space set, wherein the first search space set is a search space set for the terminal to monitor a physical downlink control channel;

and determining whether to monitor a physical downlink control channel in a special search space of the terminal according to the first search space set.

2. The method of claim 1, wherein the first set of search spaces comprises one of:

configuring a search space set with one or more search space set group identifications;

searching space set indicated by physical downlink control channel;

a search space set determined by the state of a physical downlink control channel switching timer;

a search space set in a default set of search space sets;

the set of search spaces identified by the group is not configured.

3. The method of claim 1, wherein the determining whether to listen to a physical downlink control channel in a terminal-specific search space according to the first search space set comprises at least one of:

determining whether to monitor a physical downlink control channel in a terminal dedicated search space according to the physical downlink control channel candidate number of the common search space in the first search space set and the number of non-overlapping control channel units;

and determining whether to monitor the physical downlink control channel in the terminal special search space or not according to the physical downlink control channel candidate number and the non-overlapping control channel unit number in the terminal special search space in the first search space set.

4. The method of claim 3, further comprising:

determining the number of the physical downlink control channel candidates and the number of non-overlapping control channel units of the common search space in the first search space set.

5. The method of claim 4, further comprising:

determining a first number and a second number according to the maximum physical downlink control channel candidate number and the maximum non-overlapping control channel unit number of the terminal in the first search space set, and the physical downlink control channel candidate number and the non-overlapping control channel unit number of the common search space in the first search space set;

the first number is equal to a difference between the maximum number of physical downlink control channel candidates and a number of physical downlink control channel candidates of the common search space;

the second number is equal to a difference between the maximum number of non-overlapping control channel elements and the number of non-overlapping control channel elements of the common search space.

6. The method of claim 5, wherein the determining whether to listen to a physical downlink control channel in the terminal-specific search space comprises:

sequentially judging whether the third number is less than or equal to the first number and whether the fourth number is less than or equal to the second number according to a first sequence determined by the first index value;

determining whether to monitor a physical downlink control channel in a terminal dedicated search space corresponding to the first index value according to a judgment result;

the third number is the number of the physical downlink control channel candidates of the terminal dedicated search space corresponding to the first index value, and the fourth number is the number of the non-overlapping control channel units of the terminal dedicated search space corresponding to the first index value; the first index value is an index value of a search space set in the terminal-specific search space, and the first order represents a determination order for determining whether or not a physical downlink control channel in the terminal-specific search space needs to be monitored.

7. The method of claim 6, wherein the index value of the search space set in the terminal-specific search space is an index value of a terminal-specific search space in a search space set group in which the terminal performs physical downlink control channel listening.

8. The method of claim 6, wherein if the third number is less than or equal to the first number and the fourth number is less than or equal to the second number, the method further comprises:

adjusting the first number according to the third number, and adjusting the second number according to the fourth number.

9. The method of claim 6, wherein the determining whether to monitor a physical downlink control channel in a terminal-specific search space corresponding to the first index value according to the determination result comprises:

if the index value of the first terminal-specific search space is greater than or equal to the first index value, determining not to monitor a physical downlink control channel in the first terminal-specific search space, if the third number is greater than the first number, and/or if the fourth number is greater than the second number;

alternatively, the first and second electrodes may be,

and monitoring a physical downlink control channel in a terminal dedicated search space corresponding to the first index value under the condition that the third number is less than or equal to the first number and the fourth number is less than or equal to the second number.

10. The method of claim 6, wherein the first order comprises one of:

according to the sequence of the index values of the search space set in the terminal special search space from small to large;

and according to a preset reordering rule, reordering the index values of the search space set in the terminal-specific search space.

11. The method according to claim 10, wherein the predetermined reordering rule is configured based on the number of search space set groups to which the search space set corresponding to the index value of the search space set in the terminal-specific search space belongs.

12. The method of claim 10, wherein the predetermined reordering rules comprise one of:

the order of the index values of the first type of search space set precedes the order of the index values of the second type of search space set;

the index values of the search space sets of the second type are before the arrangement order of the index values of the search space sets of the first type;

the search space sets of the first type are search space sets which do not belong to any search space set group, and the search space sets of the second type are search space sets which belong to at least one search space set group;

alternatively, the first and second electrodes may be,

the first type of search space set is a search space set belonging to a first number of search space set groups, the second type of search space set is an index value of a search space set belonging to a second number of search space set groups, and the first number is greater than the second number, or the second number is greater than the first number.

13. The method of claim 12, wherein if the number of index values of the first type of search space set is greater than 1, the index values of the first type of search space set are sorted by the size of the index values; or

And if the number of the index values of the second type of search space set is greater than 1, the index values of the second type of search space set are arranged according to the size of the index values.

14. The method according to any one of claims 1 to 13, further comprising:

and reporting a first capability to a network side, wherein the first capability represents that the terminal has the capability of determining whether to monitor a physical downlink control channel in a search space special for the terminal according to the monitored search space set.

15. The method according to any one of claims 1 to 13, further comprising:

and receiving a first signaling from a network side, wherein the first signaling instructs the terminal to determine whether to monitor a physical downlink control channel in a terminal-specific search space according to the monitored physical downlink control channel, or instructs the terminal to determine whether to monitor the physical downlink control channel in the terminal-specific search space according to all configured physical downlink control channels on an activated downlink bandwidth part.

16. The method according to any one of claims 1 to 13,

and under the condition of receiving a physical downlink control channel for switching a search space set group or under the condition of failing a timer corresponding to the current search space set group, executing the step of determining whether to monitor the physical downlink control channel in the special search space of the terminal according to the first search space set.

17. A method for indicating monitoring of a physical downlink control channel is applied to a network device, and is characterized by comprising the following steps:

and sending a first signaling to a terminal, wherein the first signaling instructs the terminal to determine whether to monitor a physical downlink control channel in a search space dedicated to the terminal according to the monitored search space set, or instructs the terminal to determine whether to monitor the physical downlink control channel in the search space dedicated to the terminal according to all the search space sets configured on the activated downlink bandwidth portion.

18. The method of claim 17, further comprising:

receiving a first capability from a terminal, the first capability indicating that the terminal has a capability of determining whether to monitor a physical downlink control channel in a search space dedicated to the terminal according to a monitored search space set.

19. A terminal, comprising:

a first determining module, configured to determine a first search space set, where the first search space set is a search space set for the terminal to perform physical downlink control channel monitoring

And the second determining module is used for determining whether to monitor the physical downlink control channel in the special search space of the terminal according to the first search space set.

20. A network device, comprising:

a sending module, configured to send a first signaling to a terminal, where the first signaling instructs the terminal to determine whether to monitor a physical downlink control channel in a search space dedicated to the terminal according to a monitored search space set, or instructs the terminal to determine whether to monitor the physical downlink control channel in a search space dedicated to the terminal according to all search space sets configured on an activated downlink bandwidth portion.

21. A communication device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the method of listening for a physical downlink control channel according to any one of claims 1 to 16; alternatively, the steps of the method for indicating listening to a physical downlink control channel according to any of claims 17 to 18.

22. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for listening to a physical downlink control channel according to any one of claims 1 to 16; alternatively, the steps of the method for indicating listening to a physical downlink control channel according to any of claims 17 to 18.