CN116996161A

CN116996161A - Physical downlink control channel receiving method, sending method and related equipment

Info

Publication number: CN116996161A
Application number: CN202210442494.3A
Authority: CN
Inventors: 郑凯立; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2023-11-03

Abstract

The application discloses a physical downlink control channel receiving method, a sending method and related equipment, belonging to the technical field of communication, wherein the physical downlink control channel receiving method in the embodiment of the application comprises the following steps: the terminal receives a first physical downlink control channel PDCCH in a first public search space CSS according to a first quasi co-located QCL hypothesis; wherein the first CSS is associated with a first set of control resources CORESET, the first CORESET being activated with two transmission configuration indications TCI states, the first QCL hypothesis being associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH.

Description

Physical downlink control channel receiving method, sending method and related equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a physical downlink control channel receiving method, a physical downlink control channel sending method and related equipment.

Background

In the New air interface (New Radio, NR), in order to enhance the transmission reliability of the physical downlink control channel (Physical Downlink Control Channel, PDCCH), a single frequency network (Single Frequency Network, SFN) transmission mode of the PDCCH is introduced, and a control resource set (Control Resource Set, CORESET) carrying the PDCCH may be indicated with 2 transmission configuration indication (Transmission Configuration Indication, TCI) states. In SFN transmission, typically the PDCCH will be transmitted through multiple transmit receive points (Multi-Transmission and Reception Point, MTRP). However, in the prior art, when CORESET carrying PDCCH is associated with two TCI states and the CORESET is also associated with a common search space (Common Search Space, CSS), how to broadcast messages, paging messages, random access related messages, and transmission of PDCCH scheduling these messages has not been solved correspondingly, thereby affecting the transmission performance of PDCCH.

Disclosure of Invention

The embodiment of the application provides a physical downlink control channel receiving method, a physical downlink control channel sending method and related equipment, which can realize the transmission of PDCCH under the condition that CORESET carrying PDCCH is associated with two TCI states and the CORESET is also associated with CSS, and improve the transmission performance of PDCCH.

In a first aspect, a method for receiving a physical downlink control channel is provided, where the method includes:

the terminal receives a first physical downlink control channel PDCCH in a first public search space CSS according to a first quasi co-located QCL hypothesis;

wherein the first CSS is associated with a first set of control resources CORESET, the first CORESET being activated with two transmission configuration indications TCI states, the first QCL hypothesis being associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH.

In a second aspect, there is provided a physical downlink control channel receiving apparatus, the apparatus comprising:

a receiving module, configured to receive a first physical downlink control channel PDCCH in a first common search space CSS according to a first quasi co-located QCL hypothesis;

In a third aspect, a method for sending a physical downlink control channel is provided, where the method includes:

the network equipment sends a first physical downlink control channel PDCCH in a first public search space CSS according to a first quasi-co-located QCL hypothesis;

In a fourth aspect, there is provided a physical downlink control channel transmitting apparatus, including:

a sending module, configured to send a first physical downlink control channel PDCCH in a first common search space CSS according to a first quasi co-located QCL hypothesis;

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to perform, in a first common search space CSS, reception of a first physical downlink control channel PDCCH according to a first quasi co-located QCL assumption;

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method according to the third aspect.

In an eighth aspect, a network side device is provided, including a processor and a communication interface, where the communication interface is configured to perform, in a first common search space CSS, transmission of a first physical downlink control channel PDCCH according to a first quasi co-located QCL assumption;

In a ninth aspect, a physical downlink control channel transmission system is provided, including: a terminal and a network side device, where the terminal may be configured to perform the steps of the method for receiving a physical downlink control channel according to the first aspect, and the network side device may be configured to perform the steps of the method for transmitting a physical downlink control channel according to the third aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions, implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the third aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the third aspect.

In the embodiment of the application, the terminal receives a first PDCCH in a first CSS according to a first QCL hypothesis; wherein the first CSS is associated with a first CORESET that is activated by two TCI states, the first QCL hypothesis is associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH. In this way, when the CORESET carrying the PDCCH is associated with two TCI states and the CORESET is also associated with the CSS, the terminal may receive the PDCCH based on at least one of the two TCI states and QCL hypotheses corresponding to the PDCCH order related to the PDCCH, thereby improving PDCCH receiving performance.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a flowchart of a method for receiving a physical downlink control channel according to an embodiment of the present application;

fig. 3 is a flowchart of a method for transmitting a physical downlink control channel according to an embodiment of the present application;

fig. 4 is a block diagram of a physical downlink control channel receiving apparatus according to an embodiment of the present application;

fig. 5 is a block diagram of a physical downlink control channel transmitting device according to an embodiment of the present application;

fig. 6 is a block diagram of a communication device according to an embodiment of the present application;

fig. 7 is a block diagram of a terminal according to an embodiment of the present application;

fig. 8 is a block diagram of a network side device according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in the NR system is described as an example, and the specific type of the base station is not limited.

For ease of understanding, some of the following descriptions are directed to embodiments of the present application:

1. type0/0A/1/2 (i.e., type 0/0A/1/2) PDCCH CSS:

a set of PDCCH candidates (candidates) monitored by a terminal device (UE) is defined according to a PDCCH search space set. The set of search spaces may be a set of CSS or a set of UE-specific search spaces (UE-specific Search Space, USS). The UE monitors PDCCH candidates centrally in one or more of the following search spaces:

a Type0-PDCCH CSS set configured by a PDCCH system information block 1 configuration (PDCCH-ConfigSIB 1) or a search space system information block 1 (searchspace ib 1) or a search space 0 (searchspace zero) in PDCCH-ConfigCommon) in a master information block (Master Information Block, MIB) for downlink control information (Downlink Control Information, DCI) format with a cyclic redundancy check (Cyclic Redundancy Check, CRC) scrambled by a system message radio network temporary identity (System Information Radio Network Temporary Identity, SI-RNTI) on a master cell of a master cell group (Master Cell Group, MCG);

a Type0A-PDCCH CSS set configured by search space other system information (searchspaceothersystemization) in PDCCH-ConfigCommon for DCI format with CRC scrambled by SI-RNTI on the primary cell of MCG;

A Type1-PDCCH CSS set configured in PDCCH-ConfigCommon by random access search space (RA-SearchSpace) for DCI format with CRC scrambled by random access radio network temporary identity (Random Access Radio Network Temporary Identity, RA-RNTI) or temporary cell radio network temporary identity (Temporary Cell Radio Network Temporary Identity, TC-RNTI) on the primary cell;

a Type2-PDCCH CSS set configured by a paging search space (paging search space) in PDCCH-ConfigCommon for a DCI format with a CRC scrambled by a paging radio network temporary identity (Paging Radio Network Temporary Identity, P-RNTI) on a primary cell of an MCG.

2. PDCCH monitoring in radio resource control (Radio Resource Control, RRC) connected state with search space identification 0 (searchspace=0):

if the Type0/0A/2-PDCCH CSS set of searchspace id in PDCCH-ConfigCommon is configured to 0 and when the UE is provided with a cell radio network temporary identity (Cell Radio Network Temporary Identity, C-RNTI), the UE monitors the PDCCH candidates only at monitoring occasions associated with synchronization signal/physical broadcast channel blocks (Synchronous Signal/Physical Broadcast Channel Block, SS/PBCH Block (also referred to as SSB) determined according to the most recent one of:

A medium access control unit (Media Access Control Element, MAC CE) activation command indicating a transmission configuration indication state of an active Bandwidth Part (BWP) for indicating a TCI state of CORESET with index 0, wherein the TCI state comprises a channel state information reference signal (Channel State Information Reference Signal, CSI-RS) quasi co-sited with SSB;

alternatively, the random access procedure is not initiated by a PDCCH order triggering a non-contention random access procedure.

3. Quasi Co-Location (QCL) assumption (assumption) in random access procedure:

for Msg2:

if the UE detects DCI format 1_0 with CRC scrambled by the corresponding RA-RNTI and receives a transport block in the corresponding physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), the UE may assume that the demodulation reference signal (Demodulation Reference Signal, DM-RS) antenna port has a quasi co-sited relationship with the SS/PBCH block or CSI-RS resource the UE is associated with for the physical random access channel (Physical Random Access Channel, PRACH), whether or not TCI status is provided for CORESET where the UE receives PDCCH with DCI format 1_0.

If the UE attempts to detect DCI format 1_0 with a corresponding RA-RNTI-scrambled CRC in response to a PRACH transmission initiated by a PDCCH order (order) triggering a contention-free random access procedure of a Special Cell (SpCell), the UE may assume a DM-RS antenna port quasi-common address including PDCCH of DCI format 1_0 and PDCCH order. If the UE attempts to detect DCI format 1_0 with CRC scrambled by the corresponding RA-RNTI in response to PRACH transmission initiated by a PDCCH order triggering a contention free random access procedure of the secondary cell, the UE may assume that it has a quasi co-sited relationship with the DM-RS antenna port of CORESET associated with the Type1-PDCCH csset receiving PDCCH including DCI format 1_0.

For Msg4:

when a DCI format, or a corresponding DCI format 0_0 scheduled PUSCH retransmission with a TC-RNTI scrambled CRC, is detected in response to a physical Uplink shared channel (Physical Uplink Sharing Channel, PUSCH) transmission scheduled by a random access response (Random Access Response, RAR) Uplink (UL) grant, where the TC-RNTI is provided for the corresponding RAR message, the UE may assume that a DM-RS antenna port carrying a PDCCH of the DCI format has a quasi co-sited relationship with an SS/PBCH block for PRACH association, whether or not a TCI state is provided for the UE to receive a CORESET of PDCCHs with the DCI format.

The physical downlink control channel receiving method and the physical downlink control channel sending method provided by the embodiment of the application are described in detail below through some embodiments and application scenarios thereof with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart of a method for receiving a physical downlink control channel according to an embodiment of the present application, where the method may be performed by a terminal, as shown in fig. 2, and includes the following steps:

step 201, the terminal receives a first PDCCH according to a first QCL hypothesis in a first CSS;

wherein the first CSS is associated with a first CORESET that is activated by two TCI states, the first QCL hypothesis is associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH.

In this embodiment, the first CSS may include, but is not limited to, at least one of a Type 0PDCCH CSS (Type 0-PDCCH CSS), a Type0A PDCCH CSS (Type 0A-PDCCH CSS), a Type 1PDCCH CSS (Type 1-PDCCH CSS), a Type 2PDCCH CSS (Type 2-PDCCH CSS), and the like.

The TCI state may indicate a receiving parameter such as channel macro information, beam information, etc. related to PDCCH receiving, where the reference signal information of the TCI state is a QCL source (QCL source), for example, the TCI state includes CSI-RS as the QCL source.

The PDCCH order related to the first PDCCH may include, but is not limited to, a PDCCH order triggering the first PDCCH. For example, the first PDCCH may be a PDCCH transmitted in a non-contention random access (CFRA) procedure triggered by the PDCCH order. The second QCL hypothesis is a QCL hypothesis corresponding to the PDCCH order, and for example, the second QCL hypothesis may refer to a QCL hypothesis adopted by the terminal for receiving the PDCCH order.

The first QCL assumption described above is associated with at least one of the two TCI states and the second QCL assumption. For example, the first QCL may correspond to at least one of the two TCI states, that is, the terminal may perform reception of the first PDCCH based on at least one of the two TCI states; or the first QCL hypothesis may correspond to the TCI state corresponding to the second QCL hypothesis, for example, the terminal may receive the first PDCCH using the TCI state corresponding to the second QCL hypothesis.

It should be noted that, in this embodiment, the terminal may be in a connected state, that is, the terminal is provided with a cell radio network temporary identifier (Cell Radio Network Temporary Identity, C-RNTI).

In the embodiment of the application, the terminal receives a first PDCCH in a first CSS according to a first QCL hypothesis; wherein the first CSS is associated with a first CORESET that is activated by two TCI states, the first QCL hypothesis is associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH. In this way, when the CORESET carrying the PDCCH is associated with two TCI states and the CORESET is also associated with the CSS, the terminal may receive the PDCCH based on at least one of the two TCI states and QCL hypotheses corresponding to the PDCCH order associated with the PDCCH, thereby improving PDCCH receiving performance.

Optionally, in the case that the identifier of the first CSS is 0, the first QCL is assumed to correspond to a first TCI state of the two TCI states, where a channel state information reference signal CSI-RS in the first TCI state has a QCL relationship with a first synchronization signal block SSB;

Wherein the first TCI state is a first TCI state or a second TCI state of the two TCI states, the first SSB associates a first listening occasion on the first CSS, the first listening occasion being for reception of the first PDCCH.

In this embodiment, the identifier of the first CSS is 0, that is, the first CSS is a search space 0 (search space zero). Optionally, the first CSS may include at least one of a Type0-PDCCH CSS, a Type0A-PDCCH CSS, and a Type2-PDCCH CSS.

The first QCL is assumed to correspond to a first TCI state of the two TCI states, where a QCL relationship exists between a CSI-RS in the first TCI state and a first SSB, where the CSI-RS in the first TCI state may be a QCL source in the first TCI state. It should be noted that, the first QCL assumption corresponds to the first TCI state of the two TCI states may mean that the terminal may perform the reception of the first PDCCH based on the first TCI state of the two TCI states.

For example, if the terminal is provided with the C-RNTI, the first CSS is a search space of searchspace id=0 configured by PDCCH-ConfigCommon, that is, it is a search space 0 (searchspace), the first CSS corresponds to at least one of Type0-PDCCH CSS set, type0A-PDCCH CSS set, and Type2-PDCCH CSS set, an Identification (ID) of the first CORESET associated with the first CSS is 0, that is, the first CSS is CORESET0 (CORESET), and the first SSB corresponding to when the terminal receives the first PDCCH is related to the MAC CE that was last used to indicate the TCI state of CORESET, wherein two CSI-RSs included as QCL sources in the two TCI states indicated in the MAC CE may have a QCL relationship with the first TCI state or the second TCI state of the two TCI states. That is, in this case, although CORESETZero is indicated for two TCI states, the terminal may perform the first PDCCH reception based on only one of the TCI states. That is, the broadcast message, the paging message, etc., transmitted on the above CORESETZero can be transmitted from only one TRP.

In this embodiment, in the case where the identifier of the first CSS is 0, the terminal may receive the first PDCCH only based on the first TCI state of the two TCI states, so that it may be avoided that some terminals that do not support the two TCI states cannot correctly receive the first PDCCH, thereby improving PDCCH receiving performance.

Optionally, the first QCL is assumed to further correspond to a second TCI state of the two TCI states, where a QCL relationship exists between the CSI-RS in the second TCI state and a second SSB;

wherein the second TCI state is the other TCI state of the two TCI states other than the first TCI state.

The second SSB may correspond to a listening occasion on the first CSS, may correspond to a listening occasion on another CSS (i.e. a CSS different from the first CSS), or may not correspond to any listening occasion, which is not limited in this embodiment.

Optionally, the second SSB corresponds to a second listening occasion on the first CSS, the second listening occasion being for reception of the first PDCCH.

In this embodiment, when the identifier of the first CSS is 0, the terminal may not only receive the first PDCCH based on the first TCI state but also receive the first PDCCH based on the second TCI state.

It should be noted that, in the case where the first QCL assumes that the second one of the two TCI states also corresponds to the first TCI state, for a terminal that does not support the two TCI states, the terminal may receive the first PDCCH based only on the first TCI state; for the terminal supporting two TCI states, the terminal may jointly receive the first PDCCH based on the first TCI state and the second TCI state, so as to improve the reliability of receiving the first PDCCH. Optionally, it should also be noted that whether the terminal may receive the first PDCCH based on the second TCI state may be the capability of the terminal.

Optionally, in a case where the identity of the first CSS is not 0, the first QCL assumes that the two TCI states are corresponding.

In this embodiment, the identifier of the first CSS is not 0, that is, the searchspace id corresponding to the first CSS is not equal to 0, that is, the first CSS is not searchspace zero. Optionally, the first CSS may include at least one of a Type0-PDCCH CSS, a Type0A-PDCCH CSS, and a Type2-PDCCH CSS.

The first QCL may be assumed to correspond to the two TCI states, which means that both the two TCI states may be used for receiving the first PDCCH, that is, the terminal may perform the reception of the first PDCCH based on the two TCI states.

For example, if the terminal is provided with the C-RNTI, the searchspace id corresponding to the first CSS configured by PDCCH-ConfigCommon is not equal to 0, i.e., the first CSS is not searchspace zero, and the first CSS corresponds to at least one of the Type0-PDCCH CSS set, the Type0A-PDCCH CSS set, and the Type2-PDCCH CSS set, when the first CORESET is activated with two TCI states, the terminal may perform reception of the first PDCCH assuming the two TCI states as the first QCL. That is, in this case, the first PDCCH may be received based on the two TCI states that are activated. That is, the broadcast message, paging message, etc., transmitted on the first CORESET described above may be transmitted in SFN transmission from two TRPs.

In this embodiment, when the identifier of the first CSS is not 0, the terminal may receive the first PDCCH based on the two TCI states, so that the reliability of PDCCH reception may be improved, and if the terminal that does not support the two TCI states may still receive a broadcast message, a paging message, etc. sent from one TRP on another CORESET (for example CORESETZero).

Optionally, the terminal expects the identity of the first CSS to be different from 0.

In this embodiment, in the case where the first CORESET associated with the first CSS is activated by two TCI states, the terminal expects the identifier of the first CSS to be different from 0, that is, the terminal does not expect the first CSS to be searchSpaceZero. That is, in the case where the first CORESET associated with the first CSS is activated by two TCI states, the network-side device needs to configure the identity of the first CSS to be other than 0.

In this embodiment, in the case where the first core associated with the first CSS is activated in two TCI states, the terminal expects the identifier of the first CSS to be different from 0, so that the terminal can be prevented from receiving PDCCHs transmitted in the form of SFNs from two TRPs.

Alternatively, in case the first CORESET associated with the first CSS is activated for two TCI states, the terminal may expect the identity of the first CSS to be different from 0, and the first QCL may assume that the two TCI states may be corresponding. That is, in the case where the first core associated with the first CSS is activated in two TCI states, the network side device needs to configure the identifier of the first CSS to be not 0, so that the terminal may receive the first PDCCH based on the two TCI states.

Optionally, in the case that the downlink control information DCI format 1_0 in the first PDCCH is scrambled by a random access radio network temporary identifier RA-RNTI and the first PDCCH is triggered by the PDCCH order, the first QCL hypothesis is associated with the second QCL hypothesis;

the PDCCH command is a PDCCH command triggering non-contention random access (CFRA).

In this embodiment, the first PDCCH is triggered by a PDCCH order, for example, the first PDCCH may be a PDCCH transmitted in a CFRA procedure triggered by the PDCCH order. The second QCL hypothesis may refer to a QCL hypothesis when the terminal receives the PDCCH order.

For example, when one PDCCH order (order) triggers one CFRA, a QCL hypothesis (i.e., the first QCL hypothesis) received by a first PDCCH (scrambled by RA-RNTI) corresponding to msg2 in the CFRA triggered by the PDCCH order has an association relationship with a QCL hypothesis (i.e., the second QCL hypothesis) corresponding to the PDCCH order. For example, the first QCL hypothesis may correspond to a part or all of the TCI states corresponding to the second QCL hypothesis, so that the terminal may receive the first PDCCH based on the part or all of the TCI states corresponding to the second QCL hypothesis.

Optionally, in the case that the second QCL hypothesis corresponds to two TCI states, the first QCL hypothesis corresponds to a first TCI state or a second TCI state of the two TCI states to which the second QCL hypothesis corresponds;

or alternatively

In the case that the second QCL hypothesis corresponds to two TCI states, the first QCL hypothesis corresponds to two TCI states to which the second QCL hypothesis corresponds;

or alternatively

In the case that the second QCL hypothesis corresponds to one TCI state, the first QCL hypothesis corresponds to one TCI state to which the second QCL hypothesis corresponds;

or alternatively

In the case that the second QCL hypothesis corresponds to one TCI state, the first QCL hypothesis corresponds to the first CORESET being activated to either the first or the second of the two TCI states.

In an embodiment, in the case that the second QCL hypothesis corresponds to two TCI states, the first QCL hypothesis corresponds to a first TCI state or a second TCI state of the two TCI states corresponding to the second QCL hypothesis, that is, the terminal does not consider the two TCI states in which the first CORESET is activated, but takes one TCI state of the two TCI states corresponding to the second QCL hypothesis as the first QCL hypothesis, that is, the PDCCH order and the demodulation reference signal (Demodulation Reference Signal, DMRS) of the first PDCCH have a QCL relationship. Therefore, after receiving the PDCCH command, the terminal can receive the first PDCCH without changing QCL assumption, and the complexity of the terminal is reduced.

For example, when the QCL hypothesis corresponding to the PDCCH order corresponds to two TCI states, that is, two TCI states are associated with CORESET carrying the PDCCH order, the first QCL hypothesis corresponds to a first TCI state or a second TCI state of the two TCI states in the second QCL hypothesis. In this case, the PDCCH order may be transmitted by a transmission scheme of a single frequency network (Single Frequency Network, SFN), and the first PDCCH (included in msg2 of CFRA) is transmitted from one TRP.

In another embodiment, in the case that the second QCL hypothesis corresponds to two TCI states, the first QCL hypothesis corresponds to two TCI states corresponding to the second QCL hypothesis, that is, the terminal disregards the two TCI states in which the first CORESET is activated, and takes the two TCI states corresponding to the second QCL hypothesis as the first QCL hypothesis. In this case, both the PDCCH order and the first PDCCH may be received based on two TCI states, and thus the reliability of receiving the PDCCH order and the first PDCCH may be improved.

For example, when the QCL hypothesis corresponding to the PDCCH order corresponds to two TCI states, that is, two TCI states are associated with CORESET carrying the PDCCH order, the first QCL hypothesis may correspond to two TCI states in the second QCL hypothesis. In this case, both the PDCCH order and the first PDCCH (included in msg2 of CFRA) may be transmitted by SFN transmission.

In another embodiment, in case that the second QCL hypothesis corresponds to one TCI state, the first QCL hypothesis corresponds to one TCI state corresponding to the second QCL hypothesis, that is, the terminal disregards two TCI states in which the first CORESET is activated, and takes one TCI state corresponding to the second QCL hypothesis as the first QCL hypothesis. In this case, both the PDCCH order and the first PDCCH are received based on one TCI state, and the terminal has low complexity of receiving the PDCCH.

For example, when the QCL hypothesis of the PDCCH order corresponds to one TCI state, that is, when the CORESET carrying the PDCCH order associates one TCI state, the first QCL hypothesis may correspond to one TCI state corresponding to the second QCL hypothesis. In this case, both the PDCCH order and the first PDCCH (contained in msg2 of CFRA) are transmitted from one TRP.

In another embodiment, in the case that the second QCL is assumed to correspond to one TCI state, the first QCL is assumed to correspond to a first TCI state or a second TCI state of the two TCI states in which the first CORESET is activated, so that the terminal can correctly receive the first PDCCH based on the first TCI state or the second TCI state of the two TCI states in which the first CORESET is activated.

For example, when the QCL of the PDCCH order assumes that one TCI state is corresponding to one TCI state, that is, the CORESET carrying the PDCCH order associates one TCI state, the first QCL may correspond to a first TCI state or a second TCI state of the two TCI states in which the first CORESET is activated. In this case, both the PDCCH order and the first PDCCH (contained in msg2 of CFRA) are transmitted from one TRP.

Optionally, before the first CSS receives the first PDCCH according to the first QCL assumption, the method further includes:

the terminal reports first capability information, wherein the first capability information is used for indicating whether the terminal supports the first PDCCH to be triggered by the PDCCH command, the PDCCH command is a PDCCH command for triggering CFRA, and QCL (Condition control logic) corresponding to the PDCCH command is supposed to correspond to two TCI states.

In this embodiment, the first CSS may be a Type1-PDCCH CSS. The DCI format 1_0 in the first PDCCH described above may be scrambled by the RA-RNTI.

Specifically, in this embodiment, whether the terminal supports the first PDCCH and is triggered by the PDCCH order corresponding to the two TCI states of the corresponding QCL is used as a piece of capability information of the terminal, and may be reported to the network side device, so that the network side device may configure the TCI state corresponding to the QCL assumption corresponding to the PDCCH order based on the capability information reported by the terminal, for example, if the terminal supports the first PDCCH and is triggered by the PDCCH order corresponding to the two TCI states of the corresponding QCL assumption, the network side device may configure the QCL assumption corresponding to the PDCCH order triggering the first PDCCH to correspond to one or two TCI states, and if the terminal does not support the first PDCCH and is triggered by the PDCCH order corresponding to the two TCI states of the corresponding QCL assumption, the network side device may configure the QCL assumption corresponding to the QCL order triggering the first PDCCH to correspond to one TCI state.

Referring to fig. 3, fig. 3 is a flowchart of a method for transmitting a physical downlink control channel according to an embodiment of the present application, where the method may be performed by a network side device, as shown in fig. 3, and includes the following steps:

step 301, the network side device performs transmission of a first PDCCH according to a first QCL assumption in a first CSS;

The PDCCH order related to the first PDCCH may include, but is not limited to, a PDCCH order triggering the first PDCCH. For example, the first PDCCH may be a PDCCH transmitted in a CFRA procedure triggered by the PDCCH order. The second QCL hypothesis is a QCL hypothesis corresponding to the PDCCH order, and for example, the second QCL hypothesis may refer to a QCL hypothesis adopted by the terminal for receiving the PDCCH order.

In the embodiment of the application, the network side equipment sends the first PDCCH on the first CSS according to the first QCL assumption, so that the terminal can receive the first PDCCH on the first CSS according to the first QCL assumption, thereby ensuring that the terminal can correctly receive the first PDCCH on the corresponding monitoring time and improving the PDCCH receiving performance.

It should be noted that, the implementation manner of this embodiment may refer to the related description of the embodiment shown in fig. 2, which is not described herein.

Optionally, the method further comprises:

The network side equipment configures the identifier of the first CSS to be not 0.

In this embodiment, in the case where the first CORESET associated with the first CSS is activated by two TCI states, the network side device needs to configure the identifier of the first CSS to be not 0. In this case, optionally, the first QCL assumption may correspond to the two TCI states.

or alternatively

In the case that the second QCL hypothesis corresponds to two TCI states, the first QCL hypothesis corresponds to two TCI states corresponding to the second QCL hypothesis;

Or alternatively

or alternatively

Optionally, before the first CSS performs the sending of the first PDCCH according to the first QCL assumption, the method further includes:

the network side equipment receives first capability information, wherein the first capability information is used for indicating whether a terminal supports the first PDCCH to be triggered by the PDCCH command, the PDCCH command is a PDCCH command for triggering CFRA, and QCL (Condition control logic) corresponding to the PDCCH command is supposed to correspond to two TCI states.

Optionally, the method may further include:

When the first capability information indicates that the terminal supports that the first PDCCH is triggered by the PDCCH command, the network side device configures one or two TCI states corresponding to QCL assumptions corresponding to the PDCCH command;

and under the condition that the first capability information indicates that the terminal does not support the triggering of the first PDCCH by the PDCCH command, the network side equipment configures a QCL hypothesis corresponding to the PDCCH command to correspond to a TCI state.

In this embodiment, when the first capability information indicates that the terminal supports that the first PDCCH is triggered by the PDCCH order, the network side device may configure one or two TCI states corresponding to a QCL hypothesis corresponding to the PDCCH order, so that the terminal may receive the PDCCH order based on the configured one or two TCI states.

And under the condition that the first capability information indicates that the terminal does not support the triggering of the first PDCCH by the PDCCH command, the network side equipment can configure a QCL (Consumer control interface) hypothesis corresponding to the PDCCH command to correspond to a TCI (traffic control interface) state, and the sample terminal can receive the PDCCH command based on the configured TCI state, so that the capability of the terminal is not exceeded while the accurate receiving of the PDCCH command is ensured.

It should be noted that, in the physical downlink control channel receiving method provided in the embodiment of the present application, the execution body may be a physical downlink control channel receiving device, or a control module in the physical downlink control channel receiving device for executing the physical downlink control channel receiving method. In the embodiment of the present application, a method for executing a physical downlink control channel receiving method by a physical downlink control channel receiving device is taken as an example, and the physical downlink control channel receiving device provided by the embodiment of the present application is described.

Referring to fig. 4, fig. 4 is a block diagram of a physical downlink control channel receiving apparatus according to an embodiment of the present application, and as shown in fig. 4, a physical downlink control channel receiving apparatus 400 includes:

a receiving module 401, configured to receive a first physical downlink control channel PDCCH in a first common search space CSS according to a first quasi co-located QCL hypothesis;

Alternatively, the apparatus expects the identity of the first CSS to be other than 0.

or alternatively

Optionally, the apparatus further includes:

and the reporting module is configured to report first capability information before the first CSS receives the first PDCCH according to the first QCL hypothesis, where the first capability information is used to indicate whether the terminal supports that the first PDCCH is triggered by the PDCCH command, the PDCCH command is a PDCCH command for triggering a CFRA, and the QCL hypothesis corresponding to the PDCCH command corresponds to two TCI states.

The physical downlink control channel receiving device in the embodiment of the application can be an electronic device, for example, an electronic device with an operating system, or can be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The physical downlink control channel receiving device provided by the embodiment of the present application can implement each process implemented by the method embodiment of fig. 2, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

It should be noted that, in the physical downlink control channel transmission method provided in the embodiment of the present application, the execution body may be a physical downlink control channel transmission device, or a control module in the physical downlink control channel transmission device for executing the physical downlink control channel transmission method. In the embodiment of the present application, a method for the physical downlink control channel transmitting device to execute the physical downlink control channel transmitting method is taken as an example, and the physical downlink control channel transmitting device provided in the embodiment of the present application is described.

Referring to fig. 5, fig. 5 is a block diagram of a physical downlink control channel transmitting apparatus according to an embodiment of the present application, and as shown in fig. 5, a physical downlink control channel transmitting apparatus 500 includes:

a transmitting module 501, configured to transmit a first physical downlink control channel PDCCH in a first common search space CSS according to a first quasi co-located QCL assumption;

Optionally, the apparatus further includes:

and the first configuration module is used for configuring the identifier of the first CSS to be not 0.

Or alternatively

or alternatively

Optionally, the apparatus further includes:

and a receiving module, configured to receive first capability information before the first CSS performs transmission of the first PDCCH according to the first QCL hypothesis, where the first capability information is used to indicate whether a terminal supports that the first PDCCH is triggered by the PDCCH order, the PDCCH order is a PDCCH order for triggering CFRA, and QCL hypotheses corresponding to the PDCCH order correspond to two TCI states.

Optionally, the apparatus further includes a second configuration module, where the second configuration module is specifically configured to:

configuring a QCL hypothesis corresponding to the PDCCH command to correspond to one or two TCI states under the condition that the first capability information indicates that the terminal supports that the first PDCCH is triggered by the PDCCH command;

And under the condition that the first capability information indicates that the terminal does not support the triggering of the first PDCCH by the PDCCH command, configuring a QCL hypothesis corresponding to the PDCCH command to correspond to a TCI state.

The physical downlink control channel transmitting device in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a network-side device, or may be other devices other than a network-side device. By way of example, the network-side devices may include, but are not limited to, the types of network-side devices 12 listed above, and the other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the present application are not limited in detail.

The physical downlink control channel transmitting device provided by the embodiment of the present application can implement each process implemented by the method embodiment of fig. 3, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Optionally, as shown in fig. 6, the embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, where the memory 602 stores a program or instructions executable on the processor 601, for example, when the communication device 600 is a terminal, the program or instructions implement the steps of the above-mentioned physical downlink control channel receiving method embodiment when executed by the processor 601, and achieve the same technical effects. When the communication device 600 is a network side device, the program or the instruction, when executed by the processor 601, implements the steps of the foregoing physical downlink control channel transmission method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for receiving a first physical downlink control channel PDCCH in a first public search space CSS according to a first quasi co-located QCL hypothesis; wherein the first CSS is associated with a first set of control resources CORESET, the first CORESET being activated with two transmission configuration indications TCI states, the first QCL hypothesis being associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 700 includes, but is not limited to: at least some of the components of the radio frequency unit 701, the network module 702, the audio output unit 703, the input unit 704, the sensor 705, the display unit 706, the user input unit 707, the interface unit 708, the memory 709, and the processor 710.

Those skilled in the art will appreciate that the terminal 700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from a network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 709 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The radio frequency unit 701 is configured to perform, in the first common search space CSS, reception of a first physical downlink control channel PDCCH according to a first quasi co-located QCL assumption; wherein the first CSS is associated with a first set of control resources CORESET, the first CORESET being activated with two transmission configuration indications TCI states, the first QCL hypothesis being associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH.

In the embodiment of the application, when the CORESET corresponding to the PDCCH is associated with two TCI states and the CORESET is also associated with the CSS, the terminal can receive the PDCCH based on the QCL assumption related to at least one of the QCL assumptions corresponding to the two TCI states and the related PDCCH command associated with the PDCCH, thereby improving the accuracy of PDCCH reception.

or alternatively

Optionally, the radio frequency unit 701 is further configured to:

And before the first CSS receives the first PDCCH according to the first QCL assumption, reporting first capability information, wherein the first capability information is used for indicating whether a terminal supports the first PDCCH to be triggered by the PDCCH command, the PDCCH command is a PDCCH command for triggering CFRA, and the QCL assumption corresponding to the PDCCH command corresponds to two TCI states.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the communication interface is used for sending a first Physical Downlink Control Channel (PDCCH) in a first public search space (CSS) according to a first quasi co-located QCL hypothesis;

wherein the first CSS is associated with a first set of control resources CORESET, the first CORESET being activated with two transmission configuration indications TCI states, the first QCL hypothesis being associated with at least one of the two TCI states and a second QCL hypothesis, the second QCL hypothesis being a QCL hypothesis corresponding to a PDCCH order related to the first PDCCH. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 8, the network side device 800 includes: an antenna 801, a radio frequency device 802, a baseband device 803, a processor 804, and a memory 805. The antenna 801 is connected to a radio frequency device 802. In the uplink direction, the radio frequency device 802 receives information via the antenna 801, and transmits the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes information to be transmitted, and transmits the processed information to the radio frequency device 802, and the radio frequency device 802 processes the received information and transmits the processed information through the antenna 801.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 803, where the baseband apparatus 803 includes a baseband processor.

The baseband device 803 may, for example, comprise at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 8, where one chip, for example, a baseband processor, is connected to the memory 805 through a bus interface, so as to invoke a program in the memory 805 to perform the network device operation shown in the above method embodiment.

The network side device may also include a network interface 806, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 800 of the embodiment of the present application further includes: instructions or programs stored in the memory 805 and executable on the processor 804, the processor 804 invokes the instructions or programs in the memory 805 to perform the methods performed by the modules shown in fig. 5 and achieve the same technical effects, and are not described herein in detail to avoid repetition.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, where the program or the instruction implements each process of the above-mentioned physical downlink control channel receiving method embodiment or implements each process of the above-mentioned physical downlink control channel sending method embodiment when executed by a processor, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or instructions, implementing each process of the above-mentioned physical downlink control channel receiving method embodiment, or implementing each process of the above-mentioned physical downlink control channel transmitting method embodiment, and can achieve the same technical effect, so as to avoid repetition, and no redundant description is needed here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiment of the present application further provides a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the above-mentioned physical downlink control channel receiving method embodiment, or implement each process of the above-mentioned physical downlink control channel sending method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a physical downlink control channel transmission system, which comprises: the terminal is configured to execute each process of the method embodiments shown in fig. 2 and described above, and the network side device is configured to execute each process of the method embodiments shown in fig. 3 and described above, so as to achieve the same technical effects, and to avoid repetition, details are not repeated here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A method for receiving a physical downlink control channel, comprising:

2. The method according to claim 1, wherein in case the identity of the first CSS is 0, the first QCL assumes a first TCI state of the two TCI states, the channel state information reference signal CSI-RS in the first TCI state having a QCL relation with a first synchronization signal block SSB;

3. The method of claim 2, wherein the first QCL hypothesis also corresponds to a second TCI state of the two TCI states, the CSI-RS in the second TCI state having a QCL relationship with a second SSB;

4. The method of claim 3, wherein the second SSB corresponds to a second listening occasion on the first CSS, the second listening occasion being for reception of the first PDCCH.

5. The method of claim 1, wherein the first QCL assumes the two TCI states if the identity of the first CSS is not 0.

6. The method of claim 1, wherein the terminal expects an identity of the first CSS to be other than 0.

7. The method of claim 1, wherein the first QCL hypothesis is associated with the second QCL hypothesis if downlink control information DCI format 1_0 in the first PDCCH is scrambled by a random access radio network temporary identity RA-RNTI and the first PDCCH is triggered by the PDCCH order;

8. The method of claim 7, wherein the first QCL hypothesis corresponds to a first TCI state or a second TCI state of the two TCI states to which the second QCL hypothesis corresponds, if the second QCL hypothesis corresponds to two TCI states;

Or alternatively

or alternatively

9. The method of claim 1, wherein the terminal further comprises, prior to the first CSS receiving the first PDCCH according to the first QCL hypothesis:

10. A method for transmitting a physical downlink control channel, comprising:

11. The method according to claim 10, wherein in case the identity of the first CSS is 0, the first QCL assumes a first TCI state of the two TCI states, the channel state information reference signal CSI-RS in the first TCI state having a QCL relation with a first synchronization signal block SSB;

12. The method of claim 11, wherein the first QCL hypothesis further corresponds to a second TCI state of the two TCI states, the CSI-RS in the second TCI state having a QCL relationship with a second SSB;

13. The method of claim 12, wherein the second SSB corresponds to a second listening occasion on the first CSS, the second listening occasion being for reception of the first PDCCH.

14. The method of claim 10, wherein the first QCL assumes the two TCI states if the identity of the first CSS is not 0.

15. The method according to claim 10, wherein the method further comprises:

16. The method of claim 10, wherein the first QCL hypothesis is associated with the second QCL hypothesis if downlink control information DCI format 1_0 in the first PDCCH is scrambled by a random access radio network temporary identity RA-RNTI and the first PDCCH is triggered by the PDCCH order;

17. The method of claim 16, wherein the first QCL hypothesis corresponds to a first TCI state or a second TCI state of the two TCI states to which the second QCL hypothesis corresponds, if the second QCL hypothesis corresponds to two TCI states;

Or alternatively

or alternatively

18. The method of claim 10, wherein the network side device further comprises, prior to the first CSS transmitting the first PDCCH according to the first QCL assumption:

19. The method of claim 18, wherein the method further comprises:

20. A physical downlink control channel receiving apparatus, comprising:

21. The apparatus of claim 20, wherein the first QCL assumes a first TCI state of the two TCI states, with a channel state information reference signal CSI-RS in the first TCI state having a QCL relationship with a first synchronization signal block SSB, if the identity of the first CSS is 0;

22. The apparatus of claim 20, wherein the first QCL assumes the two TCI states if the identity of the first CSS is not 0.

23. The apparatus of claim 20, wherein the first QCL hypothesis is associated with the second QCL hypothesis if downlink control information DCI format 1_0 in the first PDCCH is scrambled by a random access radio network temporary identity, RA-RNTI, and the first PDCCH is triggered by the PDCCH order;

24. The apparatus of claim 23, wherein the first QCL hypothesis corresponds to a first TCI state or a second TCI state of two TCI states to which the second QCL hypothesis corresponds, if the second QCL hypothesis corresponds to two TCI states;

or alternatively

Or alternatively

25. The apparatus of claim 20, wherein the apparatus further comprises:

26. A physical downlink control channel transmitting apparatus, comprising:

27. The apparatus of claim 26, wherein the first QCL assumes a first TCI state of the two TCI states, with a channel state information reference signal CSI-RS in the first TCI state having a QCL relationship with a first synchronization signal block SSB, if the identity of the first CSS is 0;

28. The apparatus of claim 26, wherein the first QCL assumes the two TCI states if the identity of the first CSS is not 0.

29. The apparatus of claim 26, wherein the first QCL hypothesis is associated with the second QCL hypothesis if downlink control information DCI format 1_0 in the first PDCCH is scrambled by a random access radio network temporary identity, RA-RNTI, and the first PDCCH is triggered by the PDCCH order;

30. The apparatus of claim 29, wherein the first QCL hypothesis corresponds to a first TCI state or a second TCI state of two TCI states to which the second QCL hypothesis corresponds, if the second QCL hypothesis corresponds to two TCI states;

or alternatively

31. The apparatus of claim 26, wherein the apparatus further comprises:

32. The apparatus of claim 31, further comprising a second configuration module, the second configuration module being specifically configured to:

33. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the physical downlink control channel reception method of any one of claims 1 to 9.

34. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the physical downlink control channel transmission method of any one of claims 10 to 19.

35. A readable storage medium, wherein a program or instructions is stored on the readable storage medium, which when executed by a processor, implements the steps of the physical downlink control channel reception method according to any one of claims 1 to 9, or implements the steps of the physical downlink control channel transmission method according to any one of claims 10 to 19.