CN110958094B

CN110958094B - Configuration method, detection method and equipment of physical downlink control channel

Info

Publication number: CN110958094B
Application number: CN201811132649.3A
Authority: CN
Inventors: 杨拓; 胡丽洁; 夏亮; 刘光毅; 王启星; 侯雪颖
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2023-03-28
Anticipated expiration: 2038-09-27
Also published as: CN110958094A

Abstract

The embodiment of the invention provides a configuration method, a detection method and equipment of a physical downlink control channel. The embodiment of the invention can reduce or avoid the related problems caused by the inconsistency of understanding the PDCCH configuration, improve the success rate of PDCCH detection and improve the system performance.

Description

Configuration method, detection method and equipment of physical downlink control channel

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a configuration method, a detection method and equipment of a physical downlink control channel.

Background

In a Downlink Control CHannel of a New-generation communication technology New Radio (5G NR), a Physical Downlink Control CHannel (PDCCH) is configured by two parts, namely, a Control resource SET (core SET) and a search space SET (search space SET). The CORESET mainly configures the resource position of the PDCCH, including frequency domain resources, a resource mapping mode, the size of resource element group bundling (REG bundle), and the like. The search space set is mainly configured with a detection period, a detection offset value, a detection time length, an aggregation level, the number of PDCCH candidate sets of each aggregation level, and the like of the search space set.

Under carrier aggregation, cross-carrier scheduling is supported, a specific high-level signaling configures whether the serving cell is a scheduling cell or a scheduled cell, and if the serving cell is the scheduled cell, the scheduling cell ID and a value in a Carrier Indicator Field (CIF) of the scheduling cell are further configured.

For a cross-carrier scheduled cell, a terminal (UE) detects in a search space in CORESET corresponding to the scheduled cell. When detecting the PDCCH of the scheduling cell, the control-channel element (CCE) index offset value detected by the UE does not need to be added with the cell indicator, and when detecting the PDCCH of the scheduling cell, the CCE index value detected by the UE needs to be added with the CIF value configured in the higher layer _CI Is a value of a carrier indicator of cross-carrier scheduling configured at a higher layer, and for convenience of description, the value of the carrier indicator is also referred to as the carrier indicator for short herein.

The terminal is in the time slot of

Detecting carrier indicator n in CORESET with index p associated with search space set with index s _CI Is aggregated to a level L>

The CCE index of (a) is:

wherein for a common search space

For UE specific search spaces

Y _p,-1 ＝n _RNTI Not equal to 0, pmod3=0 time A ₀ A of =39827, pmod3=1 ₁ A when =39829, pmod3=2 ₂ ＝39839，D＝65537；

i＝0,L,L-1；

N _CCE,p Is the total CCE number of CORESET p;

n _CI is a carrier indicator for cross-carrier scheduling of high level configuration, for any common search space n _CI ＝0.

Wherein->

Is configured for the UE corresponding to n _CI The number of PDCCH candidate sets with aggregation level L on a search space set S on the serving cell;

for any common search space

/>

For UE specific search spaces

All n configured for UE _CI In the serving cell of (2), the maximum value of the number of PDCCH candidate sets with aggregation level L in the search space set S in the CORESET p.

Since each serving cell is configured with its own CORESET and search space configuration at the time of current cross-carrier scheduling. And simultaneously, whether each serving cell is a self-scheduling cell or a scheduled cell is reconfigured, and if the serving cell is the scheduled cell, the ID of the scheduling cell and the CIF value of the scheduling cell are further configured. The UE thus knows which cells are scheduling cells, which scheduled cells can be scheduled by the scheduling cell.

However, since the scheduling cell and the scheduled cell are configured with CORESET and search space separately, there are two cases of mismatch. For example, when the search space is configured, the detection period and offset value thereof are configured. For a search space set with index s in a control resource set with index p, if the following formula is satisfied

The terminal judges that the PDCCH detection opportunity occurs in a frame number n _f Has a time slot number of->

Within the time slot of (a). Wherein k is _p,s Is the detection period of the search space set s; o. o _p,s Is the detection offset value for the search for the empty set s; />

Is the number of slots (slots) in each radio frame (frame) in a configuration with a subcarrier spacing of μ.

If the cells are cells with different subcarrier intervals, when the detection time slot is calculated according to the formula, the detection time slot is

The different subcarrier intervals are different, and if the base station understands according to the subcarrier interval of the scheduling cell and the UE understands according to the subcarrier interval of the scheduled cell, inconsistency between the base station and the UE occurs, which results in PDCCH detection errors.

Another situation is that if the CORESET configuration is different, for example, the symbol length of the scheduling cell CORESET #1 is 2, the symbol length of the scheduled cell CORESET #1 is 3, the UE determines its CCE index according to the CORESET with the symbol length of 3, and the base station schedules the UE according to the CORESET with the symbol length of 2, which may increase the collision probability between CCEs and reduce the number of UEs that can be multiplexed by the PDCCH.

It may also be the case that, since the configuration of the CORESET is based on the BWP where the CORESET is located, the BWP configuration and the active BWP configuration of each serving cell may be different, and the signaling of the configuration is different on different BWPs for the same CORESET frequency domain resource allocation. For example, if the UE detects the PDCCH according to the configuration of CORESET #1 on BWP #1 of the scheduled cell, but BWP #1 may not be activated in the scheduling cell, or the configuration of BWP #1 of the scheduling cell is different from that of the scheduled cell, the UE may not find CORESET #1 on the scheduling cell or find the frequency domain position of CORESET #1 is wrong, which may increase the collision probability between CCEs, decrease the number of UEs that the PDCCH can multiplex, or even the UE may not detect the PDCCH.

Therefore, a solution is needed to reduce the PDCCH detection failure or the system performance low caused by the inconsistency of the PDCCH configuration understanding in the cross-carrier scheduling.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method, a device, and a method for configuring a physical downlink control channel, so as to reduce or avoid a PDCCH detection failure or a low system performance caused by inconsistency of PDCCH configuration understanding.

The embodiment of the invention provides a method for configuring a Physical Downlink Control Channel (PDCCH), which comprises the following steps:

a network side configures cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:

whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a Physical Downlink Control Channel (PDCCH) of a serving cell;

an index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell;

an index of a scheduled cell scheduled by the serving cell and a value of a carrier indicator field of the scheduled cell in a PDCCH DCI format of the serving cell.

The embodiment of the invention also provides a method for detecting the PDCCH, which comprises the following steps:

the terminal detects PDCCH candidates, wherein, in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of the Control Channel Element (CCE) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

represents n _CI Searching the number of PDCCH candidates with the aggregation level L of the space set s in the CORESET p of the serving cell of 0;

when the carrier indicator field is configured in the high-layer signaling, the n _CI Taking the value of the carrier indicator field, otherwise, including any common search space, n _CI The value is 0;

the value range of i is 0-L-1.

The embodiment of the invention also provides a method for configuring the PDCCH, which comprises the following steps:

a network side configures configuration information of a search space of a service cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:

whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space;

an index of a scheduled cell scheduled by the serving cell corresponding to the search space;

and the value of the carrier indicator field of the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.

a terminal detects a PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

when the carrier indicator field is configured in the high layer signaling, the n _CI Taking the value as the value of the carrier indicator field, otherwise, the n _CI The value is 0;

the value range of i is 0-L-1.

a network side configures configuration information of a search space of a serving cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:

the index of the scheduled cell scheduled by the serving cell corresponding to the search space;

the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell;

the configuration information of the search space of the service cell configured for the terminal by the network side also comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.

the terminal detects the PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

with respect to the common search space,

for a user-specific search space, a decision is made to assert>

All n configured for a terminal _CI In the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein it is present>

the value range of i is 0-L-1.

And the terminal determines the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling.

And the terminal detects the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the high-level signaling.

the terminal detects the PDCCH of the serving cell, wherein for a search space set with an index of s in a control resource set with an index of p, a formula is satisfied

Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number n _f And the time slot number is->

Within a time slot of (c);

mu is a subcarrier interval of a control resource set with an index p of a scheduling cell;

k _p,s detection period for search space set s, o _p,s Is the detection offset value for the search for the empty set s;

the number of time slots in each radio frame in a configuration with a subcarrier spacing of mu.

An embodiment of the present invention further provides a network side device, including:

a configuration unit, configured to configure cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:

An embodiment of the present invention further provides a terminal, including:

a detecting unit, configured to detect a PDCCH candidate, where a carrier indicator n is in a control resource set CORESET with index p associated with a search space set with index s _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

when a carrier indicator field of a serving cell in a PDCCH DCI format of a scheduling cell is configured, the n _CI Taking the value of the carrier indicator field, otherwise, including any common search space, n _CI The value is 0;

the value range of i is 0-L-1.

a configuration unit, configured to configure configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:

An embodiment of the present invention further provides a terminal, including:

a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is included _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of the Control Channel Element (CCE) is:

wherein the content of the first and second substances,

representing search space related parameters; />

N _CCE,p Is the total CCE number of CORESET p;

represents n _CI Searching the number of PDCCH candidates with the aggregation level L of the space set s in CORESET p of the serving cell of 0;

when the carrier indicator field is configured in the high-layer signaling, the n _CI Taking the value as the value of the carrier indicator field, otherwise, the n _CI The value is 0;

the value range of i is 0-L-1.

the configuration information of the search space for configuring the service cell for the terminal at the network side further comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.

An embodiment of the present invention further provides a terminal, including:

a detecting unit, configured to detect a PDCCH of a serving cell, where in a control resource set CORESET with an index p associated with a search space set with an index s, a carrier indicator field n is _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

for maleThe search space is shared in a common manner,

for a user-specific search space, a decision is made to assert>

All n configured for a terminal _CI In the serving cell of (4), searching for the maximum value of the number of the PDCCH candidates with aggregation level L on the space set s in CORESET p; wherein +>

the value range of i is 0-L-1.

An embodiment of the present invention further provides a terminal, including:

a detecting unit, configured to detect a PDCCH of a serving cell, where a search space set with an index s in a control resource set with an index p satisfies a formula

Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number n _f And the time slot number is>

Within a time slot of (c);

mu is a subcarrier interval of a control resource set with index p of a scheduling cell;

An embodiment of the present invention further provides a communication device, including: the present invention relates to a method for configuring or detecting a physical downlink control channel, and a computer program stored in a memory and executable on a processor, where the method for configuring or detecting a physical downlink control channel is implemented as described above.

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 the computer program is executed by a processor, the steps of the method for configuring or detecting the physical downlink control channel described above are implemented.

The configuration method, the detection method and the equipment for the physical downlink control channel provided by the embodiment of the invention can reduce or avoid the related problems caused by the inconsistency of understanding of the PDCCH configuration, improve the success rate of PDCCH detection and improve the system performance.

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 preferred 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 schematic view of an application scenario according to an embodiment of the present invention;

fig. 2 is a flowchart of a PDCCH configuring method according to an embodiment of the present invention;

fig. 3 is a flowchart of a PDCCH configuring method according to another embodiment of the present invention;

fig. 4 is a flowchart of a PDCCH configuring method according to another embodiment of the present invention;

FIG. 5 is a flowchart illustrating a method for detecting a PDCCH according to another embodiment of the present invention;

fig. 6 is one of the structural diagrams of the network side device according to the embodiment of the present invention;

fig. 7 is a second structural diagram of a base network side device according to an embodiment of the present invention;

fig. 8 is one of the structural diagrams of a terminal according to an embodiment of the present invention;

fig. 9 is a second structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, 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. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to Long-term Evolution (LTE)/LTE-Advanced (LTE-a) 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 rd Generation Partnership project,3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3 GPP 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. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a User terminal or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station and/or a network element of a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5GNR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable term in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that the Base Station in the NR system is only taken as an example in the embodiment of the present invention, but the specific type of the Base Station is not limited.

The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.

The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include different types of base stations (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.

< example one >

Referring to fig. 2, a method for configuring a PDCCH according to an embodiment of the present invention is applied to a network side, such as a base station, and includes:

step 21, configuring cross-carrier scheduling information for the terminal by the network side; wherein the cross-carrier scheduling information comprises at least one of the following information:

In this embodiment, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not need to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, a network side configures configuration information of a control resource set and/or a search space of the serving cell for a terminal, and in addition, the network side also configures cross-carrier scheduling information for the terminal, for example, the cross-carrier scheduling information is configured through a high-level signaling, where the cross-carrier scheduling information generally includes:

1) Whether a carrier indicator field is configured in a PDCCH Downlink Control Information (DCI) format of a certain serving cell.

Generally, when the serving cell is a self-scheduling cell, a Carrier Indicator Field (CIF) does not need to be configured; when the serving cell is a scheduling cell or a scheduled cell in cross-carrier scheduling, a Carrier Indication Field (CIF) needs to be configured, the value of the CIF of the scheduling cell is usually default to 0, and for the scheduled cell, the value of the CIF is nonzero at this time.

2) An index of a scheduling cell of the serving cell and a value of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell.

When the serving cell is a scheduled cell in cross-carrier scheduling, the index of the scheduling cell of the serving cell and the value (e.g., a non-zero value) of the carrier indicator field of the serving cell in the PDCCH DCI format of the scheduling cell may also be included in the cross-carrier configuration information.

3) An index of a scheduled cell scheduled by the serving cell and a value of a carrier indicator field of the scheduled cell in a PDCCH DCI format of the serving cell.

When the serving cell is a scheduling cell in cross-carrier scheduling, the index of a scheduled cell scheduled by the serving cell and the value (e.g., non-zero value) of the carrier indicator field of the scheduled cell in the PDCCH DCI format of the serving cell may also be included in the cross-carrier configuration information.

When the carrier indicator field is configured in the PDCCH DCI format of the serving cell, the value of the carrier indicator field is 0 for the scheduling of the serving cell.

Corresponding to the method shown in fig. 2, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:

step a1, the terminal detects PDCCH candidates, wherein, in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

when the carrier indicator field is configured in the high-layer signaling, the n _CI Take a value ofValue of carrier indicator field, otherwise, including any common search space, said n _CI The value is 0;

the value range of i is 0-L-1.

In this embodiment of the present invention, the terminal may further receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:

an index of a scheduling cell of the serving cell and a carrier indicator of the serving cell in a PDCCH DCI format of the scheduling cell;

an index of a scheduled cell scheduled by the serving cell and a carrier indicator of the scheduled cell in a PDCCH DCI format of the serving cell.

Through the steps, the network side does not configure the control resource set and/or the configuration information of the search space of the scheduled cell for the terminal any more, so that the problem of inconsistent understanding of the network side and the terminal side caused by the fact that the scheduling cell and the scheduled cell are independently configured with CORESET and the search space is avoided, the PDCCH detection success rate can be improved, and the system performance is improved.

A specific example of embodiment one is provided below.

A network side configures a service cell 1 for a terminal to be self-carrier scheduling through high-level signaling, a service cell 2 supports cross-carrier scheduling, the configured service cell 2 can schedule a service cell 3, and n is correspondingly configured _CI =3, also configure serving cell 2 may schedule serving cell 4, corresponding configuration n _CI =4. The higher layer signaling will only configure PDCCH on serving cell 1 and serving cell 2, and not on serving cells 3 and 4.

Accordingly, the terminal detects n only on the serving cell 1 _CI PDCCH of = 0. On the serving cell 2, n is detected for all search spaces _CI PDCCH of =0, extra detection n for UE-specific search space _CI =3 and n _CI PDCCH of =4. In detecting PDCCH, for n _CI =3 and n _CI PDCC of =4H, the COREST and the search space are configured with n on the service cell 2 _CI The corresponding search space of =0 is the same as the configuration of CORESET.

< example two >

Referring to fig. 3, another PDCCH configuring method is further provided in an embodiment of the present invention, as shown in fig. 3, the method includes:

step 31, a network side configures configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:

In this embodiment, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not need to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When the service cell is a scheduling cell in cross-carrier scheduling, the network side configures the configuration information of the control resource set and/or the search space of the service cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, and a network side configures configuration information of a search space of the serving cell for a terminal, cross-carrier scheduling information may be added to the configuration information of the search space of the serving cell, where the cross-carrier scheduling information may include the following items:

1) Whether a carrier indicator field is configured in the PDCCH DCI format corresponding to the search space.

2) The search space corresponds to an index of a scheduled cell scheduled by the serving cell.

When the serving cell is a scheduling cell in cross-carrier scheduling, the index of the scheduling cell of the serving cell may also be included in the cross-carrier configuration information.

3) And the value of the carrier indicator field in the PDCCH DCI format corresponding to the search space of the serving cell of the scheduled cell.

When the serving cell is a scheduling cell in cross-carrier scheduling, a value (e.g., a non-zero value) of a carrier indicator field of the serving cell in a PDCCH DCI format of the scheduling cell may also be included in the cross-carrier configuration information.

Optionally, the cross-carrier scheduling information added to the configuration information of the search space of the serving cell may carry all the contents in the cross-carrier scheduling information, or may also carry part of the contents. When only carrying part of the content in the cross-carrier scheduling, the remaining part of the content may be configured to the terminal in other manners, for example, configured by other existing or newly defined higher layer signaling, which is not specifically limited in this embodiment of the present invention.

In this embodiment, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index of the serving cell have the same configuration, where the configuration of the search spaces generally includes a detection period, a detection offset value, a detection time length, an aggregation level of a search space set, and a number of PDCCH candidate sets per aggregation level. That is, one search space index of the serving cell corresponds to one search space configuration. The same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.

When the carrier indicator field is configured in the PDCCH DCI format of the serving cell, the value of the carrier indicator field is 0 for scheduling of the serving cell.

Corresponding to the above method shown in fig. 3, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:

step b1, the terminal detects the PDCCH of the serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

the value range of i is 0-L-1.

In this embodiment of the present invention, the terminal may further receive configuration information of a search space of a serving cell, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:

In this embodiment, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index of the serving cell have the same configuration, where the configuration of the search spaces generally includes a detection period, a detection offset value, a detection time length, an aggregation level of a search space set, and a number of PDCCH candidate sets per aggregation level.

A specific example of embodiment two is provided below.

The network side configures the search space 1 of the service cell 1 for the terminal through high-level signaling without including CIF, and the search space 2 of the service cell 1 includes CIF, configures it to be able to schedule the service cell 3, and configures n correspondingly _CI =3, and can schedule serving cell 4 and correspond to configuration n _CI ＝4。

The terminal detects n only on the search space 1 of the serving cell 1 _CI PDCCH of = 0. On the search space 2 of the serving cell 1, the terminal detects n _CI ＝0，n _CI =3 and n _CI PDCCH of =4. In detecting PDCCH, for n _CI =3 and n _CI PDCCH of =4, core and search space thereof are all configured with n _CI The corresponding search space of =0 is the same as the configuration of CORESET.

< example three >

Referring to fig. 4, another PDCCH configuring method is further provided in an embodiment of the present invention, and as shown in fig. 4, the method includes:

step 41, a network side configures configuration information of a search space of a serving cell for a terminal, where the configuration information of the search space includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:

the configuration information of the search space for configuring the serving cell for the terminal by the network side further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.

Here, the configuration of the search space generally includes a detection period of the search space set, a detection offset value, a detection time length, an aggregation level, and the number of PDCCH candidate sets per aggregation level, and the like. That is, one carrier indicator and one search space index of the serving cell are taken as one combination, which corresponds to one search space configuration.

1) Whether a carrier indicator field is configured in a PDCCH DCI format corresponding to the search space.

In this embodiment, the configuration information of the search space in which the network configures the serving cell for the terminal includes a search space index, and the search space index is unique in all bandwidth portions (BWPs) of the serving cell corresponding to one carrier indicator.

Corresponding to the above method shown in fig. 4, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:

step c1, the terminal detects the PDCCH of the serving cell, wherein, in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of the Control Channel Element (CCE) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

with respect to the common search space,

for a user-specific search space, a decision is made to assert>

the value range of i is 0-L-1.

In this embodiment, the terminal may further receive configuration information of a PDCCH of a serving cell sent by the network side; the serving cell is a scheduling cell in self-scheduling cell or cross-carrier scheduling, and the configuration information of the search space of the terminal includes cross-carrier scheduling information, where the cross-carrier scheduling information includes at least one of the following information:

the method comprises the steps that a terminal receives configuration information of a search space of a service cell sent by a network side, the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:

the configuration information of the search space of the serving cell further includes a search space index, wherein the same search space index corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same carrier indicator and the same search space index have the same configuration.

In this embodiment, the terminal may further receive a search space index of the serving cell configured on the network side, where the search space index is unique on all BWPs of the serving cell corresponding to one carrier indicator.

A specific example of the third embodiment is provided below.

A network side configures a search space 1 of a service cell 1 for a terminal through a high-level signaling without including a CIF; a search space 2 of a serving cell 1 is also configured to contain a CIF through high-layer signaling, but a cell which can be scheduled by the cell is not configured, and the search space contains 2 PDCCH candidates with an aggregation level of 4; the search space 2 of a serving cell 1 is also configured by high-level signaling to contain CIF, which is configured to schedule a serving cell 3, corresponding to configuration n _CI =3, the search space contains 2 PDCCH candidates with aggregation level 4; the search space 2 of a serving cell 1 is additionally configured by high-level signaling to contain CIF, which is configured to schedule a serving cell 4, corresponding to configuration n _CI =4, the search space contains 4 PDCCH candidates with aggregation level 4.

The terminal detects n only on the search space 1 of the serving cell 1 _CI PDCCH of = 0; on the search space 2 of the serving cell 1, the terminal detects n _CI ＝0，n _CI =3 and n _CI PDCCH of =4, wherein for

< example III-2 >

The embodiment of the invention also provides another PDCCH configuration method, which comprises the following steps:

step d1, a network side configures cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:

In this embodiment, when a serving cell is a scheduling cell in cross-carrier scheduling, a network side configures configuration information of a control resource set and/or a search space of the serving cell for a terminal. When the serving cell is a scheduled cell in cross-carrier scheduling, the network side also needs to configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal. When a serving cell is a scheduling cell in cross-carrier scheduling, and a network side configures configuration information of a search space of the serving cell for a terminal, cross-carrier scheduling information may be added to the configuration information of the search space of the serving cell, where the cross-carrier scheduling information may include the following items:

Corresponding to the above method, an embodiment of the present invention provides a method for detecting a PDCCH, which is applied to a terminal side, and the method includes:

step e1, the terminal detects the PDCCH of the serving cell, wherein, in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

with respect to the common search space,

for a user-specific search space, a decision is made to assert>

All n configured for a terminal _CI In the serving cell of (4), searching for the maximum value of the number of the PDCCH candidates with aggregation level L on the space set s in CORESET p; wherein the content of the first and second substances,/>

the value range of i is 0-L-1.

And the terminal determines the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space in the scheduling cell and the CORESET configured by the high-level signaling. In addition, the terminal may detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell.

Through the steps, the terminal only carries out detection according to the configuration of the control resource set in the scheduling cell configured by the network side, neglects the configuration of the control resource set in the scheduled cell configured by the network side, but still according to the configuration of the search space in the scheduled cell configured by the network side, thereby avoiding the problem of inconsistent understanding of the network side and the terminal side caused by the independent configuration of CORESET in the scheduling cell and the scheduled cell, improving the success rate of PDCCH detection and improving the system performance.

A specific example of the above embodiment is provided below.

The network side supports cross-carrier scheduling through a high-level signaling service cell 1, and a configuration service cell 1 can schedule a service cell 2 and correspondingly configure n _CI And (2). The high-level signaling configures CORESET p and search space s on the serving cell 1 at the same time, and also configures CORESET p and search space s on the serving cell 2 or the high-level signaling configures search space s only on the serving cell 2. The configuration of the search space s may be different on different serving cells. Terminal is detecting n _CI In the PDCCH of =2, the aggregation level, the candidate number, the detection time slot, and the like are determined according to the configuration of the search space s configured on the serving cell 2 by the high-level signaling, and the configuration of CORESET is determined according to the CORESET p configured on the serving cell 1 by the high-level signaling, so that the problem of inconsistency in understanding the CORESET p on the serving cells 1 and 2 is avoided.

< example four >

In this embodiment, the network side may configure cross-carrier scheduling information for the terminal through high-layer signaling. Wherein the cross-carrier scheduling configuration information comprises at least one of the following information: whether the physical downlink control channel DCI format of the serving cell includes a carrier indicator field and/or an index of a scheduling cell of the serving cell and a value of a carrier indicator of the serving cell in the downlink control channel DCI format of the scheduling cell.

And the network side respectively configures configuration information of the PDCCH for the terminal on a scheduling cell and a scheduled cell through a high-level signaling, wherein the configuration information comprises a control resource set and/or search space.

In order to avoid the problem of inconsistency caused by the PDCCH being respectively configured in the scheduling cell and the scheduled cell at the terminal side, an embodiment of the present invention provides a method for detecting a PDCCH, as shown in fig. 5, including:

step 51, the terminal detects the PDCCH of the serving cell, wherein for the search space set with index s in the control resource set with index p, the search space set satisfies the formula

Then, the terminal judges that the PDCCH detection opportunity occurs in a frame number n _f And time slotNumber is->

Within a time slot of (c);

mu is a subcarrier interval of a control resource set with an index p of a scheduling cell; for example, when the serving cell is a scheduled cell, μ is a subcarrier interval of a control resource set with index p of the scheduling cell of the serving cell; when the serving cell is a scheduling cell, mu is a subcarrier interval of a control resource set with index p of the serving cell;

Here, preferably, when the network side configures the configuration information of the PDCCH for the terminal in each of the scheduling cell and the scheduled cell, the same configuration may be configured for the control resource sets with the same index. In this way, the control resource sets with the same index in the scheduling cell and the scheduled cell configured by the terminal have the same configuration.

Through the steps, when the network side configures the PDCCH of the scheduling cell and the PDCCH of the scheduled cell for the terminal respectively, the terminal determines the PDCCH detection opportunity according to the mode, so that when the scheduling cell and the scheduled cell are configured with CORESET and a search space independently, the PDCCH detection opportunity is determined in a unified mode, the problem that the network side and the terminal side understand inconsistency is avoided, the PDCCH detection success rate is improved, and the system performance is improved.

A specific example of the fourth embodiment is provided below.

The network side configures the service cell 1 with CIF for the terminal through high-level signaling, and can schedule the service cell 2. Assume that the subcarrier spacing for serving cell 1 is 15kHz and the subcarrier spacing for serving cell 2 is 30kHz. The high layer signaling configures core 1 and search space 1 on the serving cell 1, and configures core 1 and search space 1 on the serving cell 2.

When the terminal judges the detection opportunity of the search space 1 in the CORESET1, the following formula is used

Where mu is the subcarrier spacing of cell 1 of 15khz _p,s And o _p,s Or on the serving cell 2 in accordance with higher layer signaling.

Based on the methods provided by the above embodiments, the embodiments of the present invention also provide apparatuses for implementing the methods.

Corresponding to the first embodiment, an embodiment of the present invention provides a network side device shown in fig. 6. Referring to fig. 6, an embodiment of the present invention provides a structural diagram of a network device 600, including: a configuration unit 601. Wherein the content of the first and second substances,

the configuration unit 601 is configured to configure cross-carrier scheduling information for the terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:

Preferably, the configuring unit is further configured to not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal when the serving cell is a scheduled cell in cross-carrier scheduling.

Referring to fig. 7, another schematic structural diagram of a network device 700 according to an embodiment of the present invention includes: a processor 701, a transceiver 702, a memory 703 and a bus interface, wherein:

the processor 701 is configured to read a program in a memory, and execute the following processes: configuring cross-carrier scheduling information for a terminal; wherein the cross-carrier scheduling information comprises at least one of the following information:

Preferably, the processor 701 is further configured to not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal when the serving cell is a scheduled cell in cross-carrier scheduling.

In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, 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 702 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.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.

Referring to fig. 8, an embodiment of the present invention provides a terminal 810, which includes a detecting unit 81:

the detecting unit 81 is configured to detect a PDCCH candidate, where a carrier indicator n is in a control resource set CORESET with index p associated with a search space set with index s _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

the value range of i is 0-L-1.

Preferably, the terminal further includes:

a receiving unit, configured to receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:

whether a carrier indicator field is configured in a Downlink Control Information (DCI) format of a PDCCH of a serving cell;

Referring to fig. 9, another structural diagram of a terminal according to an embodiment of the present invention is shown corresponding to the first embodiment, where the terminal 900 includes: a processor 901, a transceiver 902, a memory 903, a user interface 904, and a bus interface.

In this embodiment of the present invention, the terminal 900 further includes: a computer program stored on the memory 903 and operable on the processor 901.

The processor 901 is configured to read a program in the memory, and execute the following processes:

detecting PDCCH candidates, wherein a carrier indicator n is in a control resource set CORESET of index p associated with a search space set of index s _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

the value range of i is 0-L-1.

Preferably, the transceiver 902 is configured to receive cross-carrier scheduling information of a serving cell sent by a network side, where the cross-carrier scheduling information includes at least one of the following information:

In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with various circuits representing one or more processors, in particular processor 901, and memory, in particular memory 903, 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 902 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. The user interface 904 may also be an interface capable of interfacing externally to a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 901 is responsible for managing a bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.

Corresponding to the second to third embodiments, a structure of a network-side device similar to that of fig. 6 and 7 may be employed. The structure of the terminal similar to fig. 8 and 9 may be employed corresponding to the second to fourth embodiments. For economy of disclosure, the description is not repeated by way of illustration, but only the functions of the respective units are given.

Corresponding to the second embodiment, an embodiment of the present invention provides a network side device, which has a structure similar to that of fig. 6, and specifically includes:

Preferably, the configuring unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.

Preferably, search spaces corresponding to the same search space index of the serving cell have the same configuration.

Corresponding to the second embodiment, the embodiment of the present invention provides another network-side device, which has a structure similar to that of fig. 7, and specifically includes: a processor, a transceiver, a memory, and a bus interface, wherein:

the processor is used for reading the program in the memory and executing the following processes: configuring configuration information of a search space of a serving cell for a terminal, wherein the configuration information of the search space comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:

Preferably, the configuring unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, not configure, by the network side, the configuration information of the control resource set and/or the search space of the serving cell for the terminal.

Corresponding to the second embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 8, and specifically includes:

The CCE index of (c) is:

wherein the content of the first and second substances,

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

the value range of i is 0-L-1.

Preferably, the terminal further includes:

a receiving unit, configured to receive configuration information of a search space of a serving cell sent by a network side, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:

Preferably, the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.

Corresponding to the second embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 9, and specifically includes: a processor, a transceiver, a memory, a user interface, and a bus interface.

In the embodiment of the present invention, the terminal further includes: a computer program stored on the memory and executable on the processor.

The processor is used for reading the program in the memory and executing the following processes: detecting PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

wherein, the first and the second end of the pipe are connected with each other,

representing search space related parameters; />

N _CCE,p Is the total CCE number of CORESET p;

the value range of i is 0-L-1.

Preferably, the transceiver is configured to receive configuration information of a search space of a serving cell sent by a network side, where the configuration information of the search space of the terminal includes cross-carrier scheduling information, and the cross-carrier scheduling information includes at least one of the following information:

Corresponding to the third embodiment, an embodiment of the present invention provides a network side device, which has a structure similar to that in fig. 6, and specifically includes:

Preferably, the configuration information for configuring the search space of the serving cell for the terminal includes a search space index that is unique over all bandwidth parts BWP of the serving cell corresponding to one carrier indicator.

Preferably, in the network side device, the configuration unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.

Corresponding to the third embodiment, the embodiment of the present invention provides another network-side device, which has a structure similar to that of fig. 7, and specifically includes: a processor, a transceiver, a memory, and a bus interface, wherein:

Preferably, the configuration information for configuring the search space of the serving cell for the terminal includes a search space index that is unique across all bandwidth parts BWPs of the serving cell corresponding to one carrier indicator.

Preferably, the processor is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.

Corresponding to the third embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 8, and specifically includes:

The CCE index of the Control Channel Element (CCE) is:

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

with respect to the common search space,

for a user-specific search space, based on a search criterion>

All n configured for a terminal _CI In the serving cell of (1), searching for the maximum value of the number of PDCCH candidates with aggregation level L in the space set s in CORESET p; wherein +>

the value range of i is 0-L-1.

Preferably, the terminal further includes:

a receiving unit, configured to receive configuration information of a PDCCH of a serving cell sent by a network side; the serving cell is a scheduling cell in self-scheduling cell or cross-carrier scheduling, and the configuration information of the search space of the terminal includes cross-carrier scheduling information, where the cross-carrier scheduling information includes at least one of the following information:

the method comprises the steps that a terminal receives configuration information of a search space of a serving cell sent by a network side, the configuration information of the search space of the terminal comprises cross-carrier scheduling information, and the cross-carrier scheduling information comprises at least one of the following information:

Preferably, the terminal further includes:

the first determining unit is used for determining the association relationship between the search space of the scheduled cell and the CORESET according to the association relationship between the search space of the scheduled cell and the CORESET configured by the high-level signaling.

Preferably, the detecting unit is further configured to detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the higher layer signaling.

Preferably, the receiving unit is further configured to receive a search space index of a serving cell configured on the network side, where the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.

Corresponding to the third embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 9, and specifically includes: a processor, a transceiver, a memory, a user interface, and a bus interface.

The processor is used for reading the program in the memory and executing the following processes:

detecting PDCCH of a serving cell, wherein in a control resource set CORESET with index p associated with a search space set with index s, a carrier indicator field n _CI PDCCH candidate with aggregation level L in corresponding serving cell

The CCE index of (c) is:

representing search space related parameters;

N _CCE,p is the total CCE number of CORESET p;

with respect to the common search space,

for a user-specific search space, a decision is made to assert>

the value range of i is 0-L-1.

Preferably, the transceiver is configured to receive configuration information of a PDCCH of a serving cell sent by a network side; the serving cell is a self-scheduling cell or a scheduling cell in cross-carrier scheduling, and the configuration information of the search space of the terminal includes cross-carrier scheduling information, where the cross-carrier scheduling information includes at least one of the following information:

Preferably, the transceiver is further configured to receive a search space index of a serving cell configured on the network side, where the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.

Preferably, the processor is further configured to determine an association relationship between a search space of the scheduled cell and a CORESET according to the association relationship between the search space and the CORESET in the scheduling cell configured by the high-level signaling.

Preferably, the processor is further configured to detect the PDCCH of the scheduled cell according to the CORESET configuration in the scheduling cell configured by the higher layer signaling.

Corresponding to the fourth embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 8, and specifically includes:

Within a time slot of (c);

is the subcarrier spacing ofThe number of time slots within each radio frame in the configuration of μ.

Preferably, in the scheduling cell and the scheduled cell configured by the terminal, the control resource sets with the same index have the same configuration.

Corresponding to the fourth embodiment, an embodiment of the present invention provides a terminal, which has a structure similar to that of fig. 9, and specifically includes: a processor, a transceiver, a memory, a user interface, and a bus interface.

The processor is used for reading the program in the memory and executing the following processes: detecting PDCCH of a serving cell, wherein a search space set with index s in a control resource set with index p satisfies a formula

Within a time slot of (c);

the number of time slots in each radio frame in a configuration with a subcarrier spacing of μ.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method for indicating the space-related information according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for configuring a Physical Downlink Control Channel (PDCCH), the method comprising:

when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.

2. The configuration method according to claim 1,

the same search space index of the serving cell corresponds to a value of at least one carrier indicator field, and search spaces corresponding to the same search space index have the same configuration.

3. A method for configuring a Physical Downlink Control Channel (PDCCH) is characterized by comprising the following steps:

the configuration information of the search space of the service cell configured for the terminal by the network side also comprises a search space index, wherein the same search space index corresponds to the value of at least one carrier indicator field, and the search spaces corresponding to the same carrier indicator and the same search space index have the same configuration;

4. The configuration method according to claim 3,

the configuration information of the search space of the serving cell configured by the network side for the terminal includes a search space index, and the search space index is unique on all bandwidth portions BWP of the serving cell corresponding to one carrier indicator.

5. A network-side device, comprising:

the configuration unit is further configured to not configure, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side for the terminal, the configuration information of the control resource set and/or the search space of the serving cell.

6. The network-side device of claim 5,

the search spaces corresponding to the same search space index of the serving cell have the same configuration.

7. A network-side device, comprising:

the configuration unit is further configured to, when the serving cell is a scheduled cell in cross-carrier scheduling, the network side does not configure the configuration information of the control resource set and/or the search space of the serving cell for the terminal.

8. The network-side device of claim 7,

the configuration information configuring the search space of the serving cell for the terminal includes a search space index that is unique over all bandwidth parts BWP of the serving cell corresponding to one carrier indicator.

9. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method according to any of claims 1 to 4.

10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.