Method for determining search space, terminal device and network device

Abstract

The embodiments of the present application relate to a method for determining a search space, a terminal device, and a network device, wherein the method includes: the terminal device receives indication information, the indication information indicating: the network device transmits at least one candidate PDCCH in the first search space through at least 2 different TCI states on the first time-frequency resource; the first search space is associated with the first CORESET, and the first CORESET is associated with at least 2 different TCI states; wherein the first time-frequency resource is jointly determined by the first search space and the first CORESET; according to the indication information, the terminal device determines the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be listened to on the first time unit; wherein the first time unit is within the range of the first time-frequency resource. The embodiments of the present application can determine the number of non-overlapping CCEs detected in the search space when multi-TRP transmits PDCCH.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a method for determining a search space, a terminal device, and a network device. Background Art

[0002] In the new wireless (NR) communication technology, the physical downlink control channel (PDCCH) is enhanced based on multi-transmission / reception points (multi-TRP), and one of the supported transmission modes is that multiple TRPs transmit PDCCH through time-frequency resources. When multiple TRPs transmit PDCCH through time-frequency resources, the same PDCCH will be transmitted on the time-frequency resources through two TRPs corresponding to different transmission configuration indication (TCI) states. At this time, how to determine the number of non-overlapping control channel elements (CCE) detected in the search space containing such candidate PDCCHs needs to be standardized. Summary of the invention

[0003] The embodiments of the present application provide a method, a terminal device, and a network device for determining a search space, which can determine the number of non-overlapping CCEs detected in the search space when multi-TRP transmits PDCCH.

[0004] The present application embodiment provides a method for determining a search space, including:

[0005] The terminal device receives indication information, where the indication information indicates that: the network device transmits at least one candidate PDCCH in the first search space through at least two different TCI states on the first time-frequency resource; the first search space is associated with the first CORESET, and the first CORESET is associated with the at least two different TCI states;

[0006] The first time-frequency resource is jointly determined by the first search space and the first CORESET;

[0007] According to the indication information, the terminal device determines the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be listened to in the first time unit; wherein the first time unit is within the first time-frequency resource range.

[0008] The present application also provides a method for determining a search space, including:

[0009] The network device sends indication information to the terminal device, where the indication information is used by the terminal device to determine the number of non-overlapping CCEs detected in each first search space among multiple search spaces that need to be monitored in a first time unit; wherein,

[0010] The indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with the at least two different TCI states;

[0011] The first time-frequency resource is jointly determined by the first search space and the first CORESET.

[0012] The present application also provides a terminal device, including:

[0013] an indication information receiving module, configured to receive indication information, wherein the indication information indicates that: a network device transmits at least one candidate PDCCH in the first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with the at least two different TCI states;

[0014] The first time-frequency resource is jointly determined by the first search space and the first CORESET;

[0015] The first determination module is used to determine, according to the indication information, the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be monitored in the first time unit; wherein the first time unit is within the first time-frequency resource range.

[0016] The present application also provides a network device, including:

[0017] An indication information sending module is used to send indication information, where the indication information is used by the terminal device to determine the number of non-overlapping CCEs detected in each first search space among multiple search spaces that need to be monitored in a first time unit; wherein,

[0018] The indication information indicates that: the network device transmits at least one candidate PDCCH in the first search space through at least two different TCI states on the first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with at least two different TCI states;

[0019] The first time-frequency resource is jointly determined by the first search space and the first CORESET.

[0020] In an embodiment of the present application, the terminal device can use the received indication information to determine the number of non-overlapping CCEs detected in the search space associated with the CORESET associated with at least 2 TCI states, so as to determine the search space in which blind detection can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0022] Figure 2 It is a schematic flowchart of a method 200 for determining a search space according to an embodiment of the present application.

[0023] Figure 3 It is a flowchart of a method 300 for determining the number of non-overlapping CCEs detected in a first search space in a method for determining a search space according to an embodiment of the present application.

[0024] Figure 4 It is a schematic flowchart of a method 400 for determining a search space according to an embodiment of the present application.

[0025] Figure 5 It is a schematic diagram of CCEs occupied by candidate PDCCHs of SS 1 in an embodiment of the present application.

[0026] Figure 6 It is a schematic flowchart of a method 600 for determining a search space according to an embodiment of the present application.

[0027] Figure 7 It is a schematic diagram of the structure of a terminal device 700 according to an embodiment of the present application.

[0028] Figure 8 It is a schematic diagram of the structure of a terminal device 800 according to an embodiment of the present application.

[0029] Fig. 9 It is a schematic diagram of the structure of a network device 900 according to an embodiment of the present application.

[0030] Fig.10 It is a schematic diagram of the structure of a network device 1000 according to an embodiment of the present application.

[0031] Fig.11 is a schematic structural diagram of a communication device 1100 according to an embodiment of the present application;

[0032] Fig.12 is a schematic structural diagram of a chip 1200 according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The objects described by the "first" and "second" described at the same time may be the same or different.

[0035] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system or other communication systems.

[0036] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0037] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0038] The embodiments of the present application do not limit the spectrum to which they are applied. For example, the embodiments of the present application can be applied to licensed spectrum or unlicensed spectrum.

[0039] The embodiments of the present application describe various embodiments in combination with network devices and terminal devices, wherein: the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in an NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0040] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0041] The network device can be a device used to communicate with a mobile device. The network device can be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0042] In an embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: a metro cell, a micro cell, a picocell, a femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0043] Figure 1 An exemplary network device 110 and two terminal devices 120 are shown. Optionally, the wireless communication system 100 may include multiple network devices 110, and each network device 110 may include other number of terminal devices 120 within its coverage area, which is not limited in the present embodiment. The present embodiment may be applied to one terminal device 120 and one network device 110, or to one terminal device 120 and another terminal device 120.

[0044] Optionally, the wireless communication system 100 may also include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), etc., which is not limited in the embodiments of the present application.

[0045] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0047] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0048] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application.

[0049] The downlink control channel includes a control channel element (CCE), a search space (Search Space), a resource element group (REG), a resource element bundle (REGbundle) and a control resource set (CORESET), etc.

[0050] CCE is the basic unit of PDCCH, occupying 6 REGs in the frequency domain. A given PDCCH can be composed of 1, 2, 4, 8 or 16 CCEs. The number of CCEs that make up the PDCCH is called the aggregation level (AL).

[0051] Search Space (SS) is a set of candidate PDCCHs at a certain aggregation level. Candidate PDCCHs can also be called PDCCH candidates. The aggregation level of the PDCCH actually sent by the base station can change over time, and since there is no relevant signaling to inform the UE, the UE needs to blindly detect (blind detection can also be called blind detection) PDCCHs at different aggregation levels, where the PDCCHs to be blindly detected are called candidate PDCCHs.

[0052] Each search space is associated with a control resource set (CORESET), and different search spaces can be associated with the same or different CORESETs. CORESET specifies the frequency domain position and number of time domain symbols of the candidate PDCCH in the search space. The search space and CORESET determine the time-frequency resource range for blind PDCCH detection. PDCCH will only be transmitted within the time-frequency resource range determined by the search space and CORESET. The terminal device can support multiple CORESETs, and the CORESETs supported by the terminal device are determined by configuration information.

[0053] In NR technology, the candidate PDCCHs configured for the terminal device may exceed the upper limit of the UE's blind detection capability. At this time, the UE determines a subset of the configured candidate PDCCHs within the configured candidate PDCCH set as the candidate PDCCH set to be detected according to a predefined mechanism.

[0054] In order to determine the subset to be detected within the configured candidate PDCCH set, it is necessary to define the maximum blind detection capability of the UE, where the maximum blind detection capability includes the maximum number of candidate PDCCHs and the maximum number of non-overlapped CCEs that the terminal device can detect within each time slot or each time span.

[0055] In the existing technology, since each CORESET can only activate one TCI state at a time, there will only be one TRP for PDCCH transmission in the search space corresponding to each CORESET. However, for PDCCH based on multi-TRP transmission, one CORESET can be associated with two TCI states for PDCCH transmission, so multiple TRPs can perform SFN transmission of PDCCH through the same CORESET. At this time, multiple TRPs occupy the same CCE; in this case, how the terminal device calculates the number of CCEs in this part when performing blind detection is a problem that needs to be solved at present.

[0056] In an embodiment of the present application, for an application scenario based on multi-TRP transmission of PDCCH, the terminal device can determine the number of non-overlapping CCEs corresponding to the search space, and based on this, determine the search space for blind detection of PDCCH.

[0057] The present application embodiment proposes a method for determining a search space. Figure 2 is a schematic flow chart of a method 200 for determining a search space according to an embodiment of the present application, which method may optionally be applied to Figure 1 The system shown utilizes the Figure 1 The method includes at least part of the following contents:

[0058] S210: The terminal device receives indication information, where the indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with the at least two different TCI states;

[0059] The first time-frequency resource is jointly determined by the first search space and the first CORESET;

[0060] S220: According to the indication information, the terminal device determines the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be listened to in the first time unit; wherein the first time unit is within the first time-frequency resource range.

[0061] The first search space is a search space associated with only one CORESET.

[0062] The first time unit may include a time slot and / or a time span.

[0063] When determining the number of non-overlapping CCEs detected in the first search space, the terminal device may determine the number of non-overlapping CCEs based on the above indication information and the configuration information received in advance. The configuration information includes at least one of the following:

[0064] The search space configured for the terminal device;

[0065] CORESET configured for terminal devices;

[0066] The correspondence between the search space and CORESET;

[0067] The first CORESET among the CORESETs configured for the terminal device.

[0068] Figure 3FIG. 3 is a flow chart of a method for determining a search space according to an embodiment of the present application, for determining the number of non-overlapping CCEs detected in a first search space. Figure 3 As shown, in some implementations, the method for determining the number of non-overlapping CCEs detected in the first search space includes:

[0069] S310: Determine non-overlapping CCEs occupied by a first search space; wherein the non-overlapping CCEs occupied by the first search space include: CCEs occupied by all candidate PDCCHs configured in the first search space;

[0070] S320: Determine, according to the indication information, the number of TCI states corresponding to each non-overlapping CCE occupied by the first search space;

[0071] S330: Determine the number of non-overlapping CCEs detected in the first search space according to the number of TCI states corresponding to each non-overlapping CCE.

[0072] Optionally, in the above S310, the terminal device determines the non-overlapping CCE occupied by the first search space, including: the terminal device determines the CCE occupied by all candidate PDCCHs in the first search space; based on the CCEs occupied by all candidate PDCCHs, determines the non-overlapping CCE occupied by the first search space; wherein each non-overlapping CCE occupied by the first search space corresponds to a different CCE index.

[0073] For example, search space SS 0 is configured with 2 candidate PDCCHs, and the identifiers of the 2 candidate PDCCHs are PDCCH 1 and PDCCH 2. PDCCH 1 occupies 8 CCEs, and their indexes are CCE 0 to CCE 7; PDCCH 2 occupies 4 CCEs, and their indexes are CCE 6 to CCE 9. Then, the non-overlapping CCEs occupied by search space SS 0 include the CCEs occupied by all the candidate PDCCHs (i.e., PDCCH 1 and PDCCH 2) configured therein, i.e., CCE 0 to CCE 9; wherein each non-overlapping CCE corresponds to a different CCE index.

[0074] For another example, search space SS 1 is configured with 3 candidate PDCCHs, and the identifiers of the 3 candidate PDCCHs are PDCCH 1, PDCCH 2, and PDCCH 3. Among them, PDCCH 1 occupies 8 CCEs, and their indexes are CCE 0 to CCE 7; PDCCH 2 occupies 2 CCEs, and their indexes are CCE 6 to CCE 7; PDCCH 3 occupies 8 CCEs, and their indexes are CCE 2 to CCE 9; then, the non-overlapping CCEs occupied by search space SS 1 include the CCEs occupied by all the candidate PDCCHs (i.e., PDCCH 1, PDCCH 2, and PDCCH 3) configured therein, i.e., CCE 0 to CCE 9; wherein each non-overlapping CCE corresponds to a different CCE index.

[0075] Further, if the search space SS 0 is associated only with CORESET 1, wherein CORESET 1 is associated with two TCI states, whose identifiers are TCI state 1 and TCI state 2, respectively. The indication information received by the terminal device indicates: on the first time-frequency resource, PDCCH 1 in the search space SS 0 is transmitted simultaneously through TCI state 1 and TCI state 2. The aforementioned first time-frequency resource is jointly determined by SS1 and CORESET 1. In addition, according to other configuration information, TCI state 1 transmits PDCCH 2 in the search space SS 0.

[0076] Based on the above instructions, according to the above Figure 3 In the manner shown, the terminal device first determines the number of TCI states corresponding to each non-overlapping CCE in the non-overlapping CCE occupied by SS 0. Specifically, the number of TCI states corresponding to CCE 0 to CCE7 occupied by SS 0 is 2 (CCE 0 to CCE 7 correspond to TCI state 1 and TCI state 2, respectively), and the number of TCI states corresponding to CCE 8 to CCE 9 occupied by SS0 is 1 (CCE 8 to CCE 9 correspond to TCI state 1, respectively). Based on the aforementioned numbers, the terminal device can determine that the number of non-overlapping CCEs detected in SS 0 is 8*2+2. That is, if a non-overlapping CCE corresponds to N (N is a natural number greater than or equal to 2) TCI states, then when calculating the number of non-overlapping CCEs detected in the search space containing the non-overlapping CCE, the non-overlapping CCE is calculated N times; if a non-overlapping CCE corresponds to 1 TCI state, then when calculating the number of non-overlapping CCEs detected in the search space containing the non-overlapping CCE, the non-overlapping CCE is calculated 1 time.

[0077] In some embodiments, if the above-mentioned indication information indicates that for all candidate PDCCHs in the first search space, each candidate PDCCH is transmitted on the first time-frequency resource through two different TCI states, it can be determined that the number of non-overlapping CCEs detected in the first search space is twice the number of non-overlapping CCEs actually occupied by the first search space.

[0078] Still taking the above-mentioned SS 0 as an example, the number of non-overlapping CCEs actually occupied by SS 0 is 10 (including CCE 0 to CCE 9). If the above-mentioned indication information indicates that each candidate PDCCH in SS 0 is transmitted through two different TCI states on the first time-frequency resource, that is, PDCCH 1 and PDCCH 2 in SS 0 are transmitted simultaneously through TCI state 1 and TCI state 2; it can be determined that the number of TCI states corresponding to CCE 0 to CCE 9 actually occupied by SS 0 is 2, and therefore it can be determined that the number of non-overlapping CCEs detected in SS 0 is twice the number of non-overlapping CCEs actually occupied by it (that is, 10).

[0079] The above instructions can be provided in at least three ways:

[0080] First, in the above indication information, the first search space includes all search spaces associated only with the first CORESET.

[0081] For example, the network device configures a set of search spaces (including SS 0 to SS 5) and a set of CORESETs for the terminal device, wherein SS 0 and SS 2 are associated with CORESET 0, and CORESET 0 is associated with at least 2 different TCI states (i.e., CORESET 0 is the first CORESET mentioned above). Under this configuration, the indication information may include: transmitting candidate PDCCHs in all search spaces associated with CORESET 0 on the first time-frequency resource through the at least 2 different TCI states. In other words, the indication information does not need to indicate the index information of SS 0 and SS 2.

[0082] Second, in the above indication information, the first search space includes a partial search space associated only with the first CORESET. The partial search space may include a search space supporting simultaneous transmission of at least two different TCI states.

[0083] For example, in the case of adopting the same configuration as the first method, the indication information may include: transmitting the candidate PDCCH in part of the search space associated with CORESET 0 through the at least two different TCI states on the first time-frequency resource. That is to say, the index information of the search space needs to be clearly indicated in the indication information; if the index information of a search space is indicated in the indication information, and the search space is associated with a CORESET associated with at least two different TCI states, the candidate PDCCH in the search space is transmitted through the at least two different TCI states on the first time-frequency resource.

[0084] In one example, the indication information indicates that SS 2 and SS 3 can transmit the same PDCCH by occupying the same time-frequency resources through two TCI states when the associated CORESET is associated with two TCI states. Other SSs transmit PDCCH through one of the default TCI states when the associated CORESET is associated with two TCI states. According to the above configuration information, since the CORESET associated with SS 3 is only associated with one TCI state, the candidate PDCCH in SS 3 is transmitted only through one TCI state.

[0085] It can be seen that the difference between the above two methods is that in the first method, for a search space, as long as its associated CORESET is simultaneously associated with two TCI states, the search space is transmitted through the two TCI states on the first time-frequency resource. In the second method, both the search space and the CORESET need to be configured to use two TCI states; that is, for a search space, only if its associated CORESET is simultaneously associated with two TCI states and the search space is a search space that supports the simultaneous transmission of two TCI states, the search space will be transmitted through the two TCI states on the first time-frequency resource.

[0086] The above two methods are indicated with the search space as the granularity. The embodiment of the present application can also be indicated with the candidate PDCCH as the granularity, that is, the third method as follows.

[0087] Thirdly, the indication information may include: for some candidate PDCCHs in the first search space, transmitting the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

[0088] For example, when the same configuration is adopted as the first method, the indication information may include: transmitting PDCCH 1 in SS 0 through the two different TCI states on the first time-frequency resource respectively. For other candidate PDCCHs in SS 0, since there is no indication in the indication information, these candidate PDCCHs are transmitted through only one TCI state by default.

[0089] In the above indication information, the indication method of the part of candidate PDCCHs includes at least one of the following:

[0090] The candidate PDCCH identifier is used for indication;

[0091] The aggregation level corresponding to the candidate PDCCH is used for indication.

[0092] The embodiment of the present application may also use other methods to indicate which candidate PDCCHs belong to the above-mentioned partial candidate PDCCHs, and the embodiment of the present application does not limit the specific indication method.

[0093] By using the above indication information and the received configuration information, the terminal device can determine the number of non-overlapping CCEs detected in each first search space among the multiple search spaces that need to be monitored in the first time unit. Figure 4 is a schematic flow chart of a method 400 for determining a search space according to an embodiment of the present application, such as Figure 4 As shown, after the above step S220, the following may also be included:

[0094] S430: The terminal device determines the number of candidate PDCCHs to be detected in each search space among the multiple search spaces to be monitored in the first time unit, and the number of non-overlapping CCEs to be detected in the other search spaces except the first search space;

[0095] S440: The terminal device determines a search space that can be blindly detected according to the number of candidate PDCCHs to be detected in each search space, the number of non-overlapping CCEs detected in each search space, and the maximum blind detection capability of the terminal device in the multiple search spaces that need to be monitored in the first time unit.

[0096] S450: The terminal device performs blind detection on the search space that can be blindly detected.

[0097] The implementation of step S430 is the same as that in the prior art and will not be described in detail here.

[0098] Optionally, step S440 may include:

[0099] The terminal device sorts the multiple search spaces that need to be monitored in the first time unit according to the identifiers of the search spaces; optionally, the terminal device may sort all the search spaces; or sort the search spaces associated with the CORESETs having the same set of identifiers.

[0100] When the maximum number of candidate PDCCHs is greater than or equal to the sum of the numbers of candidate PDCCHs that need to be detected in the first N-1 search spaces, the maximum number of non-overlapping CCEs is greater than or equal to the sum of the numbers of non-overlapping CCEs detected in the first N-1 search spaces, and the maximum number of candidate PDCCHs is less than the sum of the numbers of candidate PDCCHs that need to be detected in the first N search spaces, or the maximum number of non-overlapping CCEs is less than the sum of the numbers of non-overlapping CCEs detected in the first N search spaces, it is determined that the search spaces that can be blindly detected include the first N-1 search spaces; where N is an integer in the range of 2 to M, and M is the number of search spaces that need to be listened to in the first time unit.

[0101] For example, five search spaces need to be monitored in the first time unit, and these five search spaces are sorted according to the identifiers. First, the number of candidate PDCCHs to be detected in the first search space after sorting is compared with the maximum number of candidate PDCCHs, and the number of non-overlapping CCEs detected in the first search space is compared with the maximum number of non-overlapping CCEs; if neither is exceeded, the sum of the number of candidate PDCCHs to be detected in the first search space and the second search space after sorting is compared with the maximum number of candidate PDCCHs, and the sum of the number of non-overlapping CCEs detected in the first search space and the second search space is compared with the maximum number of non-overlapping CCEs, and the same is performed in sequence. If the number of candidate PDCCHs to be detected exceeds the maximum number of candidate PDCCHs, or the number of non-overlapping CCEs exceeds the maximum number of non-overlapping CCEs, it indicates that the maximum blind detection capability of the terminal device has been exceeded at this time, and the comparison is terminated, and the first few search spaces that do not exceed the maximum blind detection capability of the terminal device are determined as search spaces that can be blindly detected.

[0102] It should be noted that in the above steps S430 and S440, the steps of determining the number of candidate PDCCHs to be detected and the number of non-overlapping CCEs to be detected in the search space and determining the search space that can be blindly detected can be performed alternately. For example, in the case where 5 search spaces need to be monitored in the first time unit, the number of candidate PDCCHs to be detected and the number of non-overlapping CCEs to be detected in the first search space are first determined, and compared with the maximum blind detection capability of the terminal device; if the maximum blind detection capability of the terminal device is not exceeded, the number of candidate PDCCHs to be detected and the number of non-overlapping CCEs to be detected in the second search space are determined, and the sum of the number of candidate PDCCHs to be detected in the first search space and the sum of the number of non-overlapping CCEs to be detected in the second search space are compared with the maximum blind detection capability of the terminal device; if the maximum blind detection capability of the terminal device is not exceeded, the number of candidate PDCCHs to be detected and the number of non-overlapping CCEs to be detected in the third search space are determined, and so on.

[0103] Alternatively, in the above steps S430 and S440, the number of candidate PDCCHs to be detected and the number of non-overlapping CCEs to be detected in all search spaces to be monitored in the first time unit may be determined first, and then the search space for blind detection may be determined. For example, in the case where five search spaces need to be monitored in the first time unit, the number of candidate PDCCHs to be detected and the number of non-overlapping CCEs to be detected in the first to fifth search spaces after sorting may be determined respectively. First, the number of candidate PDCCHs that need to be detected in the first search space and the number of non-overlapping CCEs detected are compared with the maximum blind detection capability of the terminal device; if the maximum blind detection capability of the terminal device is not exceeded, the sum of the number of candidate PDCCHs that need to be detected in the first search space and the second search space, and the sum of the number of non-overlapping CCEs detected in the first search space and the second search space are calculated, and compared with the maximum blind detection capability of the terminal device; if the maximum blind detection capability of the terminal device is not exceeded, the sum of the number of candidate PDCCHs that need to be detected in the first, second, and third search spaces, and the sum of the number of non-overlapping CCEs detected in the first, second, and third search spaces are calculated, and compared with the maximum blind detection capability of the terminal device, and so on.

[0104] The present application is described in detail with reference to specific embodiments below.

[0105] Embodiment 1:

[0106] Step 1: The network configures a set of search spaces (corresponding to search space id 0-5) and a set of CORESETs for the terminal, where each SS is associated with a CORESET. CORESET 0 associated with search space SS 2 activates two TCI states at the same time.

[0107] Step 2: The network side instructs the PDCCH candidate in the SS associated with the CORESET that activates the two TCI states simultaneously through the two TCI state transmissions on the first time-frequency resource.

[0108] Step 3: The network side selects one of the PDCCH candidates in SS 2 to send the PDCCH.

[0109] Step 4: The terminal determines that the number of search spaces to be monitored in the first time unit is M (M=6 in this example), and the corresponding search space IDs are 0, 1, 2, 3, 4, and 5.

[0110] Step 5: The terminal determines the number of PDCCH candidates to be detected and the number of CCEs to be detected in each search space according to the search space ID and the listening period and listening symbol configured in the search space. According to the above configuration and indication information, the terminal determines to transmit the PDCCH candidates in search space 2 through 2 TCI states on the first time-frequency resource, and determines that the number of non-overlapping CCEs detected in search space 2 is twice the number of non-overlapping CCEs actually occupied by search space 2.

[0111] Step 6: The terminal sorts the search spaces according to the search space id. The terminal can sort all search spaces, or sort the search spaces associated with a set of CORESETs with the same identifier. When the terminal calculates that the sum of the number of candidate PDCCHs to be detected in the first N-1 (N is greater than or equal to 2, and N is less than or equal to M) search spaces and the sum of the total number of non-overlapping CCEs detected are respectively less than the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs in the time unit, and the sum of the number of candidate PDCCHs to be detected in the first N search spaces is greater than the maximum number of candidate PDCCHs in the time unit, or the sum of the number of non-overlapping CCEs detected in the first N search spaces is greater than the maximum number of non-overlapping CCEs in the time unit, the terminal stops judging the N+1 to M search spaces and determines that the first N-1 search spaces are search spaces that can be blindly detected.

[0112] Step 7: The terminal performs blind detection of the corresponding PDCCH on the first N-1 search spaces according to the calculation result of step 6.

[0113] Embodiment 2:

[0114] Step 1: The network side configures a set of search spaces (corresponding to search space id 0-5) and a set of CORESETs for the terminal, where each SS is associated with a CORESET. The CORESET 0 associated with search space SS 0 and search space SS 2 activates two TCI states at the same time, and the CORESETs associated with other search spaces only activate one TCIstate at the same time.

[0115] Step 2: The network side instructs SS 2 and SS 3 to use the first time-frequency resource to transmit the same PDCCH when the associated CORESET activates two TCI states. Other SSs transmit PDCCH by default through one of the TCI states when the associated CORESET activates two TCI states.

[0116] Step 3: The network side selects one of the PDCCH candidates in SS 2 to send the PDCCH.

[0117] Step 4: The terminal determines that the number of search spaces to be monitored in the first time unit is M, and the corresponding search space IDs are 0, 1, 2, 3, 4, and 5.

[0118] Step 5: The terminal determines the number of PDCCH candidates and the number of CCEs to be detected in each search space according to the search space ID and the listening period and listening symbol configured in the search space. According to the above configuration and indication information, the terminal determines to transmit the PDCCH candidate in SS 2 through 2 TCI states on the first time-frequency resource, and determines that the number of non-overlapping CCEs detected in SS 2 is twice the number of non-overlapping CCEs actually occupied by SS 2. Since the CORESET associated with search space 3 only activates 1 TCI state, the terminal determines to transmit the PDCCH candidate in search space 3 through only 1 TCIstate, and determines that the number of non-overlapping CCEs detected in search space 3 is equal to the number of non-overlapping CCEs actually occupied by search space 3.

[0119] Step 6: The terminal sorts the search spaces according to the search space id. The terminal can sort all search spaces, or sort the search spaces associated with a set of CORESETs with the same identifier. When the terminal calculates that the sum of the number of candidate PDCCHs to be detected in the first N-1 (N is greater than or equal to 2, and N is less than or equal to M) search spaces and the sum of the total number of non-overlapping CCEs detected are respectively less than the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs in the time unit, and the sum of the number of candidate PDCCHs to be detected in the first N search spaces is greater than the maximum number of candidate PDCCHs in the time unit, or the sum of the number of non-overlapping CCEs detected in the first N search spaces is greater than the maximum number of non-overlapping CCEs in the time unit, the terminal stops judging the N+1 to M search spaces and determines that the first N-1 search spaces are search spaces that can be blindly detected.

[0120] Step 7: The terminal performs blind detection of the corresponding PDCCH on the first N-1 search spaces according to the calculation result of step 6.

[0121] Embodiment 3:

[0122] Step 1: The network side configures a set of search spaces (corresponding to search space id 0-5) and a set of CORESETs for the terminal, where each SS is associated with a CORESET. CORESET 0 associated with search space 0 and search space SS 2 activates two TCI states at the same time. CORESETs associated with other search spaces only activate one TCIstate at the same time.

[0123] Step 2: The network side instructs to transmit some PDCCH candidates in SS 2 or PDCCH candidates of one or several aggregation levels through the two TCI states on the first time-frequency resources, and to transmit other PDCCH candidates in SS2 through one TCI state.

[0124] Step 3: The network side selects one of the PDCCH candidates in SS 2 to send the PDCCH.

[0125] Step 4: The terminal determines that the number of search spaces to be monitored in the first time unit is M, and the corresponding search space IDs are 0, 1, 2, 3, 4, and 5.

[0126] Step 5: The terminal determines the number of PDCCH candidates and the number of CCEs to be detected in each search space according to the search space ID and the listening period and listening symbol configured in the search space. According to the above configuration and indication information, when calculating the number of non-overlapping CCEs detected in search space 2, the number of non-overlapping CCEs corresponding to 2 TCI states is determined to be X, and the number of non-overlapping CCEs corresponding to 1 TCI state is determined to be Y, then the number of non-overlapping CCEs detected in search space 2 can be determined to be X*2+Y.

[0127] Step 6: The terminal sorts the search spaces according to the search space id. The terminal can sort all search spaces, or sort the search spaces associated with a set of CORESETs with the same identifier. When the terminal calculates that the sum of the number of candidate PDCCHs to be detected in the first N-1 (N is greater than or equal to 2, and N is less than or equal to M) search spaces and the sum of the total number of non-overlapping CCEs detected are respectively less than the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs in the time unit, and the sum of the number of candidate PDCCHs to be detected in the first N search spaces is greater than the maximum number of candidate PDCCHs in the time unit, or the sum of the number of non-overlapping CCEs detected in the first N search spaces is greater than the maximum number of non-overlapping CCEs in the time unit, the terminal stops judging the N+1 to M search spaces and determines that the first N-1 search spaces are search spaces that can be blindly detected.

[0128] Step 7: The terminal performs blind detection of the corresponding PDCCH on the first N-1 search spaces according to the calculation result of step 6.

[0129] It should be noted that in the above implementation, the example of transmitting the candidate PDCCH in the first search space through 2 different TCI states on the first time-frequency resource is introduced. In other implementations of the present application, the indication information may indicate that the candidate PDCCH in the first search space is transmitted through more than 2 different TCI states on the first time-frequency resource; in this case, the way in which the terminal device determines the number of non-overlapping CCEs detected in the first search space is the same as the way in the above embodiment. For example, if the first search space SS 1 includes 2 candidate PDCCHs, namely PDCCH 0 and PDCCH 1, wherein PDCCH 0 occupies CCE 0 to CCE 7, and PDCCH 1 occupies CCE 6 to CCE 13; the above indication information indicates that there are 3 different TCI states (including TCI state 1, TCI state 2, and TCI state 3) on the first time-frequency resource to transmit PDCCH 0 in the first search space SS 1, and there are 2 different TCI states (including TCI state 3 and TCI state 4) on the first time-frequency resource to transmit PDCCH 1 in the first search space SS 1. According to the indication information, the terminal device can determine that the number of TCI states corresponding to each CCE in CCE 0~CCE 5 is 3 (i.e. corresponding to TCI state 1, TCI state 2, TCI state 3), the number of TCI states corresponding to each CCE in CCE 6~CCE 7 is 4 (i.e. corresponding to TCI state 1, TCI state 2, TCI state 3, TCI state 4), and the number of TCI states corresponding to each CCE in CCE 8~CCE 13 is 2 (i.e. corresponding to TCI state 3 and TCI state 4); based on the above numbers, the terminal device can determine that the number of non-overlapping CCEs corresponding to SS 1 = 6*3+2*4+6*2, which is equal to the sum of 3 times the number of CCEs corresponding to 3 TCI states, 4 times the number of CCEs corresponding to 4 TCI states, and 2 times the number of CCEs corresponding to 3 TCI states.

[0130] The following table is used for specific explanation: See Table 1, which shows 5 SSs (search spaces), each SS is associated with a unique CORESET id, the listening period of all search spaces is 5 slots (listening once every 5 slots), and the offset is the same, that is, PDCCH blind detection is performed on the same slot (3, 8, 13). Therefore, the number of search spaces that need to be listened to in the first time unit is 5. The terminal first determines the listening time of each search space according to the configuration, and then determines the number of non-overlapping CCEs detected in each search space according to the id size of the search space, the number of PDCCH candidates configured in each search space (including the sum of the number of all PDCCH candidates at all aggregation levels) and the number of non-overlapping CCEs occupied by each search space, and further determines the search space for blind detection.

[0131] Table 1

[0132]

[0133] Among them, CCEs occupied by different PDCCH candidates in a search space may overlap. In the embodiment of the present application, CCEs corresponding to different CCE indices occupied by all PDCCH candidates in the search space are used as non-overlapping CCEs occupied by the search space. Figure 5 FIG. 1 is a schematic diagram of CCEs occupied by candidate PDCCHs of SS 1 in an embodiment of the present application. Figure 5 As shown, search space SS 1 includes PDCCH candidates of 4 aggregation levels, each aggregation level corresponds to a corresponding number of CCEs, there is overlap of CCEs between different PDCCH candidates in the search space, and the number of non-overlapping CCEs occupied by the search space is 24, corresponding to CCE 0 to CCE 23.

[0134] See Table 2, which shows 5 SSs (search spaces), each of which is associated with a unique CORESET id; different from Table 1, the listening periods of different SSs in Table 5 are different, so the SSs that need to be listened to at each listening time point are not all SSs, but need to be determined according to the listening period configuration of the specific SS. For example, the SSs that need to be listened to in slot 3 are SS1 and SS3, and at this time, only the number of non-overlapping CCEs detected in SS1 and SS3 and the number of candidate PDCCHs that need to be detected need to be calculated, and the search space for blind detection is further determined.

[0135] Table 2

[0136]

[0137] In addition, the above Tables 1 and 2 are introduced using the time unit of slot as an example, and the embodiment of the present application can also use span as the time unit. For example, if the length of span is 3 symbols, the listening position of SS 2 in Table 2 is located at the second span of slot 4, slot 9, and slot 14 respectively.

[0138] The present application also proposes a method for determining a search space. Figure 6 is a schematic flow chart of a method 600 for determining a search space according to an embodiment of the present application, which method may optionally be applied to Figure 1 The system shown utilizes the Figure 1 The method includes at least part of the following contents:

[0139] S610: The network device sends indication information to the terminal device, where the indication information is used by the terminal device to determine the number of non-overlapping CCEs detected in each first search space among multiple search spaces that need to be monitored in a first time unit; wherein,

[0140] The indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with at least two different TCI states;

[0141] The first time-frequency resource is jointly determined by the first search space and the first CORESET.

[0142] Optionally, in the above indication information, the first search space includes all search spaces associated only with the first CORESET.

[0143] Optionally, in the above indication information, the first search space includes a partial search space associated only with the first CORESET.

[0144] Optionally, the partial search space includes a search space that supports simultaneous transmission of at least 2 different TCI states.

[0145] Optionally, the above indication information indicates: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

[0146] Optionally, the indication method of the above-mentioned part of candidate PDCCHs includes at least one of the following:

[0147] The candidate PDCCH identifier is used for indication;

[0148] The aggregation level corresponding to the candidate PDCCH is used for indication.

[0149] Optionally, the method further includes: the network device sending configuration information to the terminal device, where the configuration information includes at least one of the following:

[0150] The search space configured for the terminal device;

[0151] CORESET configured for terminal devices;

[0152] The correspondence between the search space and CORESET;

[0153] The first CORESET among the CORESETs configured for the terminal device.

[0154] The present application also provides a terminal device, Figure 7 7 is a schematic diagram of the structure of a terminal device 700 according to an embodiment of the present application, including:

[0155] The indication information receiving module 710 is configured to receive indication information, where the indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with at least two different TCI states;

[0156] The first time-frequency resource is jointly determined by the first search space and the first CORESET;

[0157] The first determination module 720 is used to determine, according to the indication information, the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be monitored in the first time unit; wherein the first time unit is within the first time-frequency resource range.

[0158] In some embodiments, the above-mentioned first determination module 720 is used to determine the non-overlapping CCE occupied by the first search space; wherein the non-overlapping CCE occupied by the first search space includes: CCE occupied by all candidate PDCCHs configured in the first search space; according to the indication information, determine the number of TCI states corresponding to each non-overlapping CCE occupied by the first search space; according to the number of TCI states corresponding to each non-overlapping CCE, determine the number of non-overlapping CCEs detected in the first search space.

[0159] In some embodiments, the first determination module 720 is used to determine the CCEs occupied by all candidate PDCCHs in the first search space; determine the non-overlapping CCEs occupied by the first search space based on the CCEs occupied by all candidate PDCCHs; wherein each non-overlapping CCE occupied by the first search space corresponds to a different CCE index.

[0160] In some embodiments, the above-mentioned first determination module 720 is used to, based on the indication information, determine that the number of non-overlapping CCEs detected in the first search space is twice the number of non-overlapping CCEs actually occupied in the first search space if, for all candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs on the first time-frequency resources through two different TCI states respectively.

[0161] In some implementations, in the above indication information, the first search space includes all search spaces associated only with the first CORESET.

[0162] In some implementations, in the indication information, the first search space includes a portion of the search space associated only with the first CORESET.

[0163] In some implementations, the partial search space includes a search space that supports simultaneous transmission of at least two different TCI states.

[0164] In some implementations, the above indication information indicates that: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

[0165] In some implementations, the indication method of the above-mentioned part of the candidate PDCCHs includes at least one of the following:

[0166] The candidate PDCCH identifier is used for indication;

[0167] The aggregation level corresponding to the candidate PDCCH is used for indication.

[0168] Figure 8 is a schematic diagram of the structure of a terminal device 800 according to an embodiment of the present application, such as Figure 8 As shown, the above terminal device may further include:

[0169] The configuration information receiving module 830 is used to receive configuration information, where the configuration information includes at least one of the following:

[0170] The search space configured for the terminal device;

[0171] CORESET configured for terminal devices;

[0172] The correspondence between the search space and CORESET;

[0173] The first CORESET among the CORESETs configured for the terminal device.

[0174] In some implementations, the first determination module 720 is configured to determine, based on the configuration information and the indication information, the number of non-overlapping CCEs detected in a first search space among the multiple search spaces that need to be monitored in a first time unit.

[0175] like Figure 8 As shown, the above terminal device may further include:

[0176] The second determination module 840 is used to determine the number of candidate PDCCHs to be detected in each search space among the multiple search spaces to be monitored in the first time unit, and the number of non-overlapping CCEs to be detected in the other search spaces except the first search space;

[0177] The blind detection module 850 is used to determine the search space that can be blindly detected based on the number of candidate PDCCHs that need to be detected in each search space, the number of non-overlapping CCEs detected in each search space, and the maximum blind detection capability of the terminal device in the multiple search spaces that need to be listened to in the first time unit; and perform blind detection on the search space that can be blindly detected.

[0178] In some implementations, the maximum blind detection capability includes a maximum number of candidate PDCCHs and a maximum number of non-overlapping CCEs;

[0179] In some embodiments, the above-mentioned blind detection module 850 is used to sort the multiple search spaces that need to be listened to in the first time unit according to the identifiers; when the maximum number of candidate PDCCHs is greater than or equal to the sum of the numbers of candidate PDCCHs that need to be detected in the first N-1 search spaces, the maximum number of non-overlapping CCEs is greater than or equal to the sum of the numbers of non-overlapping CCEs detected in the first N-1 search spaces, and the maximum number of candidate PDCCHs is less than the sum of the numbers of candidate PDCCHs that need to be detected in the first N search spaces, or the maximum number of non-overlapping CCEs is less than the sum of the numbers of non-overlapping CCEs detected in the first N search spaces, it is determined that the search spaces that can be blindly detected include the first N-1 search spaces; wherein N is an integer in the range of 2 to M, and M is the number of search spaces that need to be listened to in the first time unit.

[0180] Optionally, the blind detection module sorts all search spaces; or sorts the search spaces associated with CORESETs having a set of identical identifiers.

[0181] In some implementations, the first time unit includes a time slot and / or a time span.

[0182] It should be understood that the above and other operations and / or functions of the modules in the terminal device according to the embodiment of the present application are respectively to implement Figure 2 The corresponding process of the terminal device in the method 200 is not repeated here for the sake of brevity.

[0183] The embodiment of the present application also provides a network device, Fig. 9 9 is a schematic diagram of the structure of a network device 900 according to an embodiment of the present application, including:

[0184] The indication information sending module 910 is used to send indication information, where the indication information is used by the terminal device to determine the number of non-overlapping CCEs detected in each first search space among multiple search spaces that need to be monitored in the first time unit; wherein,

[0185] The indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with at least two different TCI states;

[0186] The first time-frequency resource is jointly determined by the first search space and the first CORESET.

[0187] In some implementations, in the above indication information, the first search space includes all search spaces associated only with the first CORESET.

[0188] In some implementations, in the above indication information, the first search space includes a partial search space associated only with the first CORESET.

[0189] In some implementations, the partial search space includes a search space that supports simultaneous transmission of at least two different TCI states.

[0190] In some implementations, the above indication information indicates that: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

[0191] In some implementations, the indication method of the above-mentioned part of the candidate PDCCHs includes at least one of the following:

[0192] The candidate PDCCH identifier is used for indication;

[0193] The aggregation level corresponding to the candidate PDCCH is used for indication.

[0194] Fig.10 1 is a schematic diagram of the structure of a network device 1000 according to an embodiment of the present application. Fig.10 As shown, the above network device may further include:

[0195] The configuration information sending module 1020 is used to send configuration information to the terminal device, and the configuration information includes at least one of the following:

[0196] The search space configured for the terminal device;

[0197] CORESET configured for terminal devices;

[0198] The correspondence between the search space and CORESET;

[0199] The first CORESET among the CORESETs configured for the terminal device.

[0200] It should be understood that the above and other operations and / or functions of the modules in the network device according to the embodiment of the present application are respectively to implement Figure 6 The corresponding process of the network device in the method 600 is not repeated here for the sake of brevity.

[0201] Fig.11 It is a schematic structural diagram of a communication device 1100 according to an embodiment of the present application. Fig.11 The communication device 1100 shown includes a processor 1110, and the processor 1110 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0202] Alternatively, if Fig.11 As shown, the communication device 1100 may further include a memory 1120. The processor 1110 may call and run a computer program from the memory 1120 to implement the method in the embodiment of the present application.

[0203] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0204] Alternatively, if Fig.11 As shown, the communication device 1100 may further include a transceiver 1130, and the processor 1110 may control the transceiver 1130 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0205] The transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of the antennas may be one or more.

[0206] Optionally, the communication device 1100 may be a terminal device of an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0207] Optionally, the communication device 1100 may be a network device of an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0208] Fig.12 is a schematic structural diagram of a chip 1200 according to an embodiment of the present application. Fig.12 The chip 1200 shown includes a processor 1210, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0209] Alternatively, if Fig.12 As shown, the chip 1200 may further include a memory 1220. The processor 1210 may call and run a computer program from the memory 1220 to implement the method in the embodiment of the present application.

[0210] The memory 1220 may be a separate device independent of the processor 1210 , or may be integrated into the processor 1210 .

[0211] Optionally, the chip 1200 may further include an input interface 1230. The processor 1210 may control the input interface 1230 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0212] Optionally, the chip 1200 may further include an output interface 1240. The processor 1210 may control the output interface 1240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0213] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0214] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0215] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0216] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or other programmable logic devices, transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0217] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM).

[0218] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0219] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0220] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0221] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0222] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for determining a search space, comprising: The terminal device receives indication information, where the indication information indicates that: the network device indicates TCI state transmission of at least one candidate physical downlink control channel PDCCH in the first search space through at least two different transmission configurations on the first time-frequency resource; the first search space is associated with a first control resource set CORESET, and the first CORESET is associated with the at least two different TCI states; The first time-frequency resource is jointly determined by the first search space and the first CORESET; According to the indication information, the terminal device determines the number of non-overlapping control channel elements CCE detected in the first search space among multiple search spaces that need to be listened to in the first time unit; wherein the first time unit is within the first time-frequency resource range.

2. The method according to claim 1, wherein: The terminal device determines, according to the indication information, the number of non-overlapping CCEs detected in the first search space among the multiple search spaces that need to be monitored in the first time unit, including: The terminal device determines the non-overlapping CCEs occupied by the first search space; wherein the non-overlapping CCEs occupied by the first search space include: CCEs occupied by all candidate PDCCHs configured in the first search space; Determine, according to the indication information, the number of TCI states corresponding to each non-overlapping CCE occupied by the first search space; The number of non-overlapping CCEs detected in the first search space is determined according to the number of TCI states corresponding to each non-overlapping CCE.

3. The method according to claim 2, wherein: The terminal device determines the non-overlapping CCEs occupied by the first search space, including: The terminal device determines the CCEs occupied by all candidate PDCCHs in the first search space; According to the CCEs occupied by all the candidate PDCCHs, non-overlapping CCEs occupied by the first search space are determined; wherein each non-overlapping CCE occupied by the first search space corresponds to a different CCE index.

4. The method according to claim 1, wherein: The method for determining the number of non-overlapping CCEs detected in the first search space includes: According to the indication information, if for all candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs through two different TCI states on the first time-frequency resources respectively, then it is determined that the number of non-overlapping CCEs detected in the first search space is twice the number of non-overlapping CCEs actually occupied by the first search space.

5. The method according to any one of claims 1 to 4, wherein: In the indication information, the first search space includes all search spaces associated only with the first CORESET.

6. The method according to any one of claims 1 to 4, wherein: In the indication information, the first search space includes a partial search space associated only with the first CORESET.

7. The method according to claim 6, wherein: The partial search space includes a search space that supports simultaneous transmission of at least two different TCI states.

8. The method according to any one of claims 1 to 4, wherein: The indication information indicates: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

9. The method according to claim 8, wherein: The indication method of the part of candidate PDCCHs includes at least one of the following: The candidate PDCCH identifier is used for indication; The aggregation level corresponding to the candidate PDCCH is used for indication.

10. The method according to any one of claims 1 to 4, further comprising: The terminal device receives configuration information, where the configuration information includes at least one of the following: a search space configured for the terminal device; A CORESET configured for the terminal device; The correspondence between the search space and CORESET; The first CORESET in the CORESETs configured for the terminal device.

11. The method according to claim 10, wherein: The terminal device determines, based on the configuration information and the indication information, the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be listened to in the first time unit.

12. The method according to any one of claims 1 to 4, further comprising: The terminal device determines, in a plurality of search spaces that need to be monitored in a first time unit, the number of candidate PDCCHs that need to be detected in each search space, and the number of non-overlapping CCEs detected in other search spaces except the first search space; The terminal device determines the search space that can be blindly detected according to the number of candidate PDCCHs that need to be detected in each search space, the number of non-overlapping CCEs detected in each search space, and the maximum blind detection capability of the terminal device in the multiple search spaces that need to be listened to in the first time unit; The terminal device performs blind detection on the search space that can be blindly detected.

13. The method according to claim 12, wherein: The maximum blind detection capability includes the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs; The terminal device determines the search space that can be blindly detected according to the number of candidate PDCCHs that need to be detected in each search space, the number of non-overlapping CCEs detected in each search space, and the maximum blind detection capability of the terminal device, including: Sorting the multiple search spaces that need to be monitored in the first time unit according to the identifiers; When the maximum number of candidate PDCCHs is greater than or equal to the sum of the numbers of candidate PDCCHs that need to be detected in the first N-1 search spaces, the maximum number of non-overlapping CCEs is greater than or equal to the sum of the numbers of non-overlapping CCEs detected in the first N-1 search spaces, and the maximum number of candidate PDCCHs is less than the sum of the numbers of candidate PDCCHs that need to be detected in the first N search spaces, or the maximum number of non-overlapping CCEs is less than the sum of the numbers of non-overlapping CCEs detected in the first N search spaces, it is determined that the search spaces that can be blindly detected include the first N-1 search spaces; wherein N is an integer in the range of 2 to M, and M is the number of search spaces that need to be listened to in the first time unit.

14. The method according to claim 13, wherein: The sorting includes: Sort all search spaces, or search spaces associated with a CORESET that have the same set of identifiers.

15. The method according to any one of claims 1 to 4, wherein: The first time unit includes a time slot and / or a time span.

16. A method for determining a search space, comprising: The network device sends indication information to the terminal device, where the indication information is used by the terminal device to determine the number of non-overlapping CCEs detected in each first search space among multiple search spaces that need to be monitored in a first time unit; wherein, The indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with the at least two different TCI states; The first time-frequency resource is jointly determined by the first search space and the first CORESET.

17. The method according to claim 16, wherein: In the indication information, the first search space includes all search spaces associated only with the first CORESET.

18. The method according to claim 16, wherein: In the indication information, the first search space includes a partial search space associated only with the first CORESET.

19. The method according to claim 18, wherein: The partial search space includes a search space that supports simultaneous transmission of at least two different TCI states.

20. The method according to claim 16, wherein: The indication information indicates: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

21. The method according to claim 20, wherein: The indication method of the part of candidate PDCCHs includes at least one of the following: The candidate PDCCH identifier is used for indication; The aggregation level corresponding to the candidate PDCCH is used for indication.

22. The method according to any one of claims 16 to 21, further comprising: The network device sends configuration information to the terminal device, where the configuration information includes at least one of the following: a search space configured for the terminal device; A CORESET configured for the terminal device; The correspondence between the search space and CORESET; The first CORESET in the CORESETs configured for the terminal device.

23. A terminal device, comprising: an indication information receiving module, configured to receive indication information, wherein the indication information indicates that: a network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with the at least two different TCI states; The first time-frequency resource is jointly determined by the first search space and the first CORESET; The first determination module is used to determine, according to the indication information, the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be monitored in the first time unit; wherein the first time unit is within the first time-frequency resource range.

24. The terminal device according to claim 23, wherein: The first determination module is used to determine the non-overlapping CCEs occupied by the first search space; wherein the non-overlapping CCEs occupied by the first search space include: CCEs occupied by all candidate PDCCHs configured in the first search space; according to the indication information, determine the number of TCI states corresponding to each non-overlapping CCE occupied by the first search space; and determine the number of non-overlapping CCEs detected in the first search space according to the number of TCI states corresponding to each non-overlapping CCE.

25. The terminal device according to claim 24, wherein: The first determination module is used to determine the CCEs occupied by all candidate PDCCHs in the first search space; determine the non-overlapping CCEs occupied by the first search space based on the CCEs occupied by all candidate PDCCHs; wherein each non-overlapping CCE occupied by the first search space corresponds to a different CCE index.

26. The terminal device according to claim 23, wherein: The first determination module is used to determine, based on the indication information, that the number of non-overlapping CCEs detected in the first search space is twice the number of non-overlapping CCEs actually occupied in the first search space if, for all candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs respectively on the first time-frequency resources through two different TCI states.

27. The terminal device according to any one of claims 23 to 26, wherein: In the indication information, the first search space includes all search spaces associated only with the first CORESET.

28. The terminal device according to any one of claims 23 to 26, wherein: In the indication information, the first search space includes a partial search space associated only with the first CORESET.

29. The terminal device according to claim 28, wherein: The partial search space includes a search space that supports simultaneous transmission of at least two different TCI states.

30. The terminal device according to any one of claims 23 to 26, wherein: The indication information indicates: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

31. The terminal device according to claim 30, wherein: The indication method of the part of candidate PDCCHs includes at least one of the following: The candidate PDCCH identifier is used for indication; The aggregation level corresponding to the candidate PDCCH is used for indication.

32. The terminal device according to any one of claims 23 to 26, further comprising: The configuration information receiving module is used to receive configuration information, wherein the configuration information includes at least one of the following: a search space configured for the terminal device; A CORESET configured for the terminal device; The correspondence between the search space and CORESET; The first CORESET in the CORESETs configured for the terminal device.

33. The terminal device according to claim 32, wherein: The first determination module is used to determine, according to the configuration information and the indication information, the number of non-overlapping CCEs detected in the first search space among multiple search spaces that need to be monitored in a first time unit.

34. The terminal device according to any one of claims 23 to 26, further comprising: A second determination module is used to determine the number of candidate PDCCHs to be detected in each search space among multiple search spaces that need to be monitored in a first time unit, and the number of non-overlapping CCEs detected in other search spaces except the first search space; A blind detection module is used to determine the search space that can be blindly detected based on the multiple search spaces that need to be listened to in the first time unit, the number of candidate PDCCHs that need to be detected in each search space, the number of non-overlapping CCEs detected in each search space, and the maximum blind detection capability of the terminal device; and perform blind detection on the search space that can be blindly detected.

35. The terminal device according to claim 34, wherein: The maximum blind detection capability includes the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs; The blind detection module is used to sort the multiple search spaces that need to be listened to in the first time unit according to the identifiers; when the maximum number of candidate PDCCHs is greater than or equal to the sum of the numbers of candidate PDCCHs that need to be detected in the first N-1 search spaces, the maximum number of non-overlapping CCEs is greater than or equal to the sum of the numbers of non-overlapping CCEs detected in the first N-1 search spaces, and the maximum number of candidate PDCCHs is less than the sum of the numbers of candidate PDCCHs that need to be detected in the first N search spaces, or the maximum number of non-overlapping CCEs is less than the sum of the numbers of non-overlapping CCEs detected in the first N search spaces, determine that the search spaces that can be blindly detected include the first N-1 search spaces; wherein N is an integer in the range of 2 to M, and M is the number of search spaces that need to be listened to in the first time unit.

36. The terminal device according to claim 35, wherein: The blind detection module sorts all search spaces, or sorts the search spaces associated with CORESETs having a set of identical identifiers.

37. The terminal device according to any one of claims 23 to 26, wherein: The first time unit includes a time slot and / or a time span.

38. A network device comprising: An indication information sending module is used to send indication information, where the indication information is used by the terminal device to determine the number of non-overlapping CCEs detected in each first search space among multiple search spaces that need to be monitored in a first time unit; wherein, The indication information indicates that: the network device transmits at least one candidate PDCCH in a first search space through at least two different TCI states on a first time-frequency resource; the first search space is associated with a first CORESET, and the first CORESET is associated with the at least two different TCI states; The first time-frequency resource is jointly determined by the first search space and the first CORESET.

39. The network device according to claim 38, wherein: In the indication information, the first search space includes all search spaces associated only with the first CORESET.

40. The network device according to claim 38, wherein: In the indication information, the first search space includes a partial search space associated only with the first CORESET.

41. The network device according to claim 40, wherein: The partial search space includes a search space that supports simultaneous transmission of at least two different TCI states.

42. The network device according to claim 38, wherein: The indication information indicates: for some candidate PDCCHs in the first search space, the network device transmits the candidate PDCCHs in two different TCI states on the first time-frequency resources respectively.

43. The network device according to claim 42, wherein: The indication method of the part of candidate PDCCHs includes at least one of the following: The candidate PDCCH identifier is used for indication; The aggregation level corresponding to the candidate PDCCH is used for indication.

44. The network device according to any one of claims 38 to 43, further comprising: A configuration information sending module is used to send configuration information to the terminal device, and the configuration information includes at least one of the following: a search space configured for the terminal device; A CORESET configured for the terminal device; The correspondence between the search space and CORESET; The first CORESET in the CORESETs configured for the terminal device.

45. A terminal device, comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, and execute the network device according to any one of claims 1 to 15.

46. ​​A network device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 16 to 22.

47. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 15.

48. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 16 to 22.

49. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 15.

50. A computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 16 to 22.

51. A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method as claimed in any one of claims 1 to 15.

52. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 16 to 22.

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