Method and apparatus for determining quasi co-located downlink rs and terminal

Abstract

The application discloses a quasi co-location downlink RS determination method, device and terminal, and belongs to the technical field of communication. The quasi co-location downlink RS determination method of the embodiment of the application comprises the following steps: in the case that a terminal performs physical random access channel (PRACH) repeated transmission, the terminal determines a target downlink RS which is quasi co-located (QCL) with the antenna port of a demodulation reference signal (DMRS) of a target downlink channel; wherein the target downlink channel comprises at least one of the following channels: a physical downlink control channel (PDCCH) used for scheduling a random access response (RAR); a physical downlink shared channel (PDSCH) used for transmitting the RAR; a PDCCH used for scheduling Msg3 retransmission; a PDSCH used for transmitting contention resolution information; a PDCCH used for scheduling the contention resolution information; and a PDCCH used for the terminal to listen to a control resource set (CORESET) #0.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a method and device for determining quasi-colocation downlink reference signal (RS) and a terminal. BACKGROUND

[0002] In a competitive random access process, different terminals randomly select preambles for transmission. When different terminals select the same preamble for transmission on the same resource, the competitive random access process is triggered. If the competition is not successfully resolved, the terminal reselects the random access channel (RACH) transmission resource and performs physical RACH (PRACH) transmission to perform the next random access attempt.

[0003] In the related art, after the terminal transmits the PRACH, the terminal performs random access response (RAR) (Msg2) and physical downlink control channel (PDCCH) scheduling RAR, PDCCH scheduling Msg3 retransmission, and Msg4 (including physical downlink shared channel (PDSCH) and PDCCH scheduling PDSCH) reception. It is assumed that the antenna port of the demodulation reference signal (DMRS) and the terminal used to transmit the PRACH associated synchronization signal / physical broadcast channel block (SSB) or channel state information reference signal (CSI-RS) are quasi-colocation (QCL).

[0004] However, if the terminal performs repeated transmission of the PRACH, considering that the SSB associated with the random access channel opportunity (RO) used by the repeated PRACH transmission can be different, and the transmission beams corresponding to different SSBs are also different, the terminal needs to determine the assumption of the downlink reception beam in the beams of multiple SSBs after transmitting the PRACH. Therefore, how to determine the SSB referenced by the downlink channel RAR (Msg2) and the PDCCH scheduling RAR, the PDCCH scheduling Msg3 retransmission, and Msg4 (including PDSCH and PDCCH scheduling PDSCH) is a problem to be solved. SUMMARY

[0005] The embodiment of the application provides a method, device and terminal for determining quasi co-located downlink RS, which can determine the target downlink RS quasi co-located with the antenna port of the DMRS of the target downlink channel in the case of PRACH repeated transmission.

[0006] In a first aspect, a method for determining quasi co-located downlink RS is provided, which is applied to a terminal, and the method comprises the following steps.

[0007] In the case of PRACH repeated transmission of the terminal, the terminal determines the target downlink RS quasi co-located with the antenna port of the DMRS of the target downlink channel; wherein the target downlink channel comprises at least one of the following channels:

[0008] a PDCCH used for scheduling a random access response (RAR);

[0009] a PDSCH used for transmitting the RAR;

[0010] a PDCCH used for scheduling Msg3 retransmission;

[0011] a PDSCH used for transmitting contention resolution information;

[0012] a PDCCH used for scheduling the contention resolution information;

[0013] a PDCCH used for the terminal to listen to in a CORESET#0.

[0014] In a second aspect, a device for determining quasi co-located downlink RS is provided, which comprises the following steps.

[0015] A determining module is configured to determine, in the case of PRACH repeated transmission of the terminal, the target downlink RS quasi co-located with the antenna port of the DMRS of the target downlink channel; wherein the target downlink channel comprises at least one of the following channels:

[0016] a PDCCH used for scheduling a random access response (RAR);

[0017] a PDSCH used for transmitting the RAR;

[0018] a PDCCH used for scheduling Msg3 retransmission;

[0019] a PDSCH used for transmitting contention resolution information;

[0020] a PDCCH used for scheduling the contention resolution information;

[0021] The PDCCH used by the terminal to listen in the control resource set CORESET#0.

[0022] Thirdly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0023] Fourthly, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to: determine a target downlink RS with a quasi-co-located antenna port QCL of a demodulation reference signal DMRS and a target downlink channel when the terminal performs repeated transmissions of the Physical Random Access Channel (PRACH); wherein the target downlink channel includes at least one of the following channels:

[0024] The physical downlink control channel (PDCCH) used for scheduling random access response (RAR);

[0025] The Physical Downlink Shared Channel (PDSCH) is used for transmitting RAR.

[0026] PDCCH used for scheduling Msg3 retransmissions;

[0027] PDSCH is used to transmit contention resolution information;

[0028] PDCCH is used to schedule contention resolution information;

[0029] The PDCCH used by the terminal to listen in the control resource set CORESET#0.

[0030] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0031] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect.

[0032] In a seventh aspect, a computer program / program product is provided, the computer program / program product being stored in a non-transient storage medium, the program / program product being executed by at least one processor to implement the steps of the method for determining quasi-co-addressable downlink RS as described in the first aspect.

[0033] In the embodiments of the present application, in the case of PRACH repeated transmission, the terminal determines the target downlink RS quasi co-located with the antenna port of the DMRS of the target downlink channel, so that the terminal only needs to monitor the target downlink channel quasi co-located with the target downlink RS, which can save monitoring resources and improve random access efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 Structure diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0035] Figure 2 One of the flow diagrams of the method for determining the quasi co-located downlink RS provided by the embodiments of the present application;

[0036] Figure 3 Another of the flow diagrams of the method for determining the quasi co-located downlink RS provided by the embodiments of the present application;

[0037] Figure 4 Ascending order diagram of the SSB index value provided by the embodiments of the present application;

[0038] Figure 5 Diagram of the number of PRACH retransmission provided by the embodiments of the present application;

[0039] Figure 6 Diagram of the time sequence of the RAR PDCCH MO in the RAR window provided by the embodiments of the present application;

[0040] Figure 7 Structure diagram of the device for determining the quasi co-located downlink RS provided by the embodiments of the present application;

[0041] Figure 8 One of the structure diagrams of the terminal provided by the embodiments of the present application;

[0042] Figure 9 Another of the structure diagrams of the terminal provided by the embodiments of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0044] The terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and are not necessarily used to describe a sequence or an order of importance. It will be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the present application are, for example, capable of proper functioning if the terms are interchanged. It is also to be understood that the terminology "and / or" as used herein refers to at least one of the items, and that the conjunction "and / or" is used to indicate that the associated listed items are to be considered either individually or in combination. In addition, the terms "first", "second", and the like as used in the description and in the claims of the present application are used for distinguishing between similar objects and do not necessarily have an ordinal number meaning. For example, the terms "first" and "second" are used herein to designate the objects that have a same or similar function in order to avoid confusion among the objects. For example, a first and a second objects do not denote or imply that the first object precedes the second object in time or order of use or appearance. For example, without departing from the scope of the present application, the first object can precede the second object in time or order of use or appearance. On the other hand, the second object can precede the first object in time or order of use or appearance. The terms "first", "second", and the like should be interpreted to be used for the purpose of distinguishing one object from another object with regard to describing the application and not necessarily in an ordinal number sense or in accordance to the order of appearance of the objects.

[0045] It is worth noting that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can be applied to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in the embodiments of the present application, and the described techniques can be applied to the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for the purpose of example, and NR terminology is used in most of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems. th Generation, 6G) communication systems.

[0046] Figure 1 A schematic diagram of the structure of a wireless communication system to which the embodiments of the present application can be applied. As illustrated in FIG. 1, the wireless communication system includes base stations 101, 102, and 103, a base station control element (BCE) 150, and a core network element (CNE) 160. The base stations 101, 102, and 103 are connected to the BCE 150, and the BCE 150 is connected to the CNE 160. The base stations 101, 102, and 103 provide a service to terminals 171, 172, and 173 located in a coverage area of the base stations 101, 102, and 103, respectively. Figure 1As shown in the figure, the wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 can also be referred to as a terminal device or a user terminal (User Equipment, UE). The terminal 11 can be a mobile phone, a tablet personal computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), a palm computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (a home device with wireless communication function, such as a refrigerator, a television, a washing machine, or furniture, etc.), and the like. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart ankle bracelet, a smart ankle chain, etc.), a smart wristband, smart clothing, a game console, and the like. It should be noted that the specific type of terminal 11 is not limited in the embodiments of the present application. The network side device 12 can be a base station or a core network. The base station can be referred to as a node B, an evolved node B, 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 node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a transmitting receiving point (Transmitting Receiving Point, TRP), or some other appropriate term in the art, as long as the same technical effect is achieved. The base station is not limited to a specific technical term, and it should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0047] The determination method of the quasi co-location downlink RS provided by the embodiments of the present application will be described in detail in combination with the drawings and some embodiments and application scenarios.

[0048] The embodiment of the present application provides a method for determining a quasi co-located downlink RS. In the case of PRACH repeated transmission, a terminal determines a target downlink RS which is quasi co-located with the antenna port of the DMRS of a target downlink channel, so that the terminal only needs to monitor the target downlink channel which is quasi co-located with the target downlink RS, thereby saving monitoring resources and improving random access efficiency.

[0049] Figure 2 FIG. 1 is one of flow diagrams of the method for determining a quasi co-located downlink RS provided by the embodiment of the present application. The method is applied to a terminal. As shown in FIG. 1, the method comprises the following steps: Figure 2

[0050] In the case of PRACH repeated transmission of the terminal, the terminal determines a target downlink RS which is quasi co-located with the antenna port of the DMRS of a target downlink channel; wherein the target downlink channel comprises at least one of the following channels:

[0051] PDCCH used for scheduling RAR;

[0052] PDSCH used for transmitting RAR;

[0053] PDCCH used for scheduling Msg3 retransmission;

[0054] PDSCH used for transmitting contention resolution information;

[0055] PDCCH used for scheduling contention resolution information;

[0056] PDCCH used for monitoring by the terminal in control resource set (CORESET) #0.

[0057] Optionally, the embodiment of the present application can be applied to a PRACH repeated transmission scenario, and the terminal can include but is not limited to the types of the terminal 11 listed above. The target downlink RS comprises at least one of the following: SSB, CSI-RS. It should be noted that the PDSCH used for transmitting contention resolution information is also called Msg4 in NR; and the PDCCH used for scheduling contention resolution information (i.e. Msg4) is a PDCCH scrambled by a temporary cell radio network temporary identifier (TC-RNTI).

[0058] ​Optionally, the properties of the quasi co-location can comprise a Doppler shift, a Doppler spread, an average delay, a delay spread, and spatial RX parameters.

[0059] The method for determining the quasi co-located downlink RS provided by the embodiments of the present application can be used in the case of PRACH repeated transmission. The terminal determines the target downlink RS which is quasi co-located with the antenna port of the DMRS of the target downlink channel, so that the terminal only needs to monitor the target downlink channel which is quasi co-located with the target downlink RS, thereby saving the monitoring resources and improving the random access efficiency.

[0060] Optionally, the implementation of the terminal determining the target downlink RS which is quasi co-located with the antenna port of the DMRS of the target downlink channel can comprise at least one of the following ways:

[0061] In the case that the target downlink channel comprises the PDCCH used for scheduling the RAR, the terminal determines the target downlink RS which is quasi co-located with the antenna port of the DMRS of the PDCCH used for scheduling the RAR based on the target information, wherein the target information comprises at least one of the following information:

[0062] The time domain position of the monitoring occasion (MO) of the PDCCH;

[0063] At least one downlink SSB;

[0064] At least one downlink CSI-RS;

[0065] The target RO associated with the PRACH preamble sent by the terminal comprises at least one downlink RS.

[0066] Optionally, the at least one downlink SSB can comprise at least one of the following: all the SSBs sent by the serving cell of the terminal; and at least one SSB associated with the PRACH repeatedly sent by the terminal.

[0067] Optionally, the at least one downlink CSI-RS can comprise at least one of the following: all the CSI-RSs associated with the random access resource used by the terminal; and at least one CSI-RS associated with the PRACH repeatedly sent by the terminal.

[0068] Optionally, the implementation of the terminal determining the target downlink RS quasi co-located with the antenna port of the DMRS of the PDCCH for scheduling the RAR based on the target information can include: in the case that the target information includes the time domain position of the monitoring occasion of the PDCCH, the terminal determines the target downlink RS quasi co-located with the antenna port of the DMRS of the at least one PDCCH in the RAR window based on the downlink RS associated with the at least one PRACH corresponding to the time domain position of the monitoring occasion of the at least one PDCCH, respectively; wherein the time sequence of the time domain position of the monitoring occasion of the at least one PDCCH and the index of the downlink RS associated with the at least one PRACH correspond one by one in ascending order. That is, in the RAR window, the multiple monitoring occasions of the PDCCH for scheduling the RAR correspond one by one in time sequence and the index of the at least one downlink RS as described above. Optionally, the time sequence refers to the sequence of time; when the terminal monitors the monitoring occasion of the first PDCCH, the antenna port of the DMRS of the first PDCCH and the at least one downlink SSB and / or downlink CSI-RS associated with the at least one PRACH corresponding to the time domain position of the monitoring occasion of the first PDCCH are quasi co-located.

[0069] Optionally, the at least one downlink RS associated with the target RO of the PRACH preamble sent by the terminal can include at least one of the following:

[0070] 1) the at least one downlink RS associated with the first RO or the last RO of the multiple ROs in which the terminal performs PRACH repeated transmission;

[0071] 2) the at least one downlink RS associated with one RO of the multiple ROs in which the terminal performs PRACH repeated transmission, indicated by the network side device; for example, the network side device indicates by a system information block (SIB);

[0072] 3) the first x downlink RSs or the last x downlink RSs associated with the multiple ROs in which the terminal performs PRACH repeated transmission; wherein x is greater than or equal to 1; the actual value of x can be predefined by a protocol or configured by the network side device, for example, the network side device indicates the actual value of x by a SIB.

[0073] Manner 2, the terminal determines a target downlink RS that is quasi co-located with an antenna port of a DMRS of the target downlink channel based on a downlink RS that is quasi co-located with the detected PDCCH for scheduling RAR. For example, the terminal, upon detecting the PDCCH for scheduling RAR, determines a target downlink RS that is quasi co-located with an antenna port of a DMRS of the target downlink channel (e.g., PDSCH for transmitting RAR; PDCCH for scheduling Msg3 retransmission; PDSCH for transmitting contention resolution information; PDCCH for scheduling contention resolution information; PDCCH for which the terminal listens in CORESET#0) based on a downlink RS that is quasi co-located with the detected PDCCH for scheduling RAR.

[0074] Manner 3, the terminal acquires a downlink RS indicated by the network-side device in the PDCCH for scheduling RAR or the PDSCH for transmitting RAR; and the terminal determines a target downlink RS that is quasi co-located with an antenna port of a DMRS of the target downlink channel based on the acquired downlink RS indicated by the network-side device in the PDCCH for scheduling RAR or the PDSCH for transmitting RAR.

[0075] Manner 4, in the case where the target downlink channel includes the PDCCH for which the terminal listens in CORESET#0, the terminal determines a target downlink RS that is quasi co-located with an antenna port of a DMRS of the PDCCH for which the terminal listens in the CORESET#0 based on a downlink RS indicated by the network-side device in received Msg4. Optionally, before the terminal determines the target downlink RS that is quasi co-located with the antenna port of the DMRS of the PDCCH for which the terminal listens in the CORESET#0 based on the downlink RS indicated by the network-side device in the received Msg4, the terminal transmits Msg3 to the network-side device; wherein the Msg3 carries channel state information (CSI) of at least one downlink RS. Optionally, the CSI includes at least one of the following: Reference Signal Received Power (RSRP), Signal to Interference Noise Ratio (SINR), and Channel Quality Indicator (CQI).

[0076] Figure 3 FIG. 2 is a flowchart illustrating a method for determining a quasi co-located downlink RS according to an embodiment of the present application, which is applied to a terminal. Figure 3 As shown in FIG. 2, the method includes the following steps.

[0077] Step 301, in the case of PRACH repetition transmission of the terminal, the terminal determines a target downlink RS quasi co-located with the antenna port of the DMRS of the target downlink channel; wherein the target downlink channel includes at least one of the following channels:

[0078] PDCCH for scheduling RAR;

[0079] PDSCH for transmitting RAR;

[0080] PDCCH for scheduling Msg3 retransmission;

[0081] PDSCH for transmitting contention resolution information;

[0082] PDCCH for scheduling contention resolution information;

[0083] PDCCH for the terminal to monitor in CORESET#0.

[0084] Step 302, the terminal monitors the target downlink channel quasi co-located with the target downlink RS based on the target downlink RS.

[0085] The method for determining quasi co-located downlink RS provided by the embodiments of the present application, in the case of PRACH repetition transmission and the SSB associated with the RO used each time for PRACH transmission is not completely the same, the terminal determines the target downlink RS quasi co-located with the antenna port of the DMRS of the target downlink channel from the multiple SSBs associated, so that the terminal only needs to monitor the target downlink channel quasi co-located with the target downlink RS, which can save channel monitoring resources and improve random access efficiency.

[0086] The method for determining quasi co-located downlink RS provided by the embodiments of the present application will be described below by taking the downlink RS of the terminal determining the QCL of different monitoring occasions in the RAR window as an example.

[0087] After the terminal performs PRACH transmission, the RAR window is started, and the terminal monitors the random access response (RAR) in the window. The window can include multiple monitoring occasions.

[0088] In the case of PRACH repetition transmission of the terminal, the UE uses different QCL assumptions when monitoring in multiple PDCCH monitoring occasions in the window, that is, it is considered that the DMRS of these PDCCHs and different downlink RSs (including SSB and / or CSI-RS) are quasi co-located. The SSB and / or CSI-RS includes at least one of the following:

[0089] 1) the SSBs are all SSBs transmitted by a serving cell of the terminal, which is indicated by the network;

[0090] 2) the CSI-RSs are all CSI-RSs configured by the network side device in association with random access resources used by the terminal;

[0091] 3) the SSBs are at least one SSB associated with PRACH repeatedly transmitted by the terminal;

[0092] 4) the CSI-RSs are at least one CSI-RS associated with PRACH repeatedly transmitted by the terminal.

[0093] In the window, the DMRS of the PDCCH monitoring is quasi co-located with the corresponding downlink RS in the time order of the PDCCH monitoring occasion and the index of the plurality of downlink RSs in ascending order. The correspondence can be described by the following figure. Figure 4 The ascending order diagram of the SSB index value provided by the embodiment of the present application, Figure 5 The number of PRACH retransmission provided by the embodiment of the present application, Figure 6 The diagram of the RAR PDCCH MO in the RAR window in the time order provided by the embodiment of the present application; see Figures 4-6 The figure, the terminal has performed 4 times of PRACH repeated transmission (respectively, the first transmission, the second transmission, the third transmission, the fourth transmission), and the repeated transmission is performed on at least 4 ROs associated with 4 SSBs (respectively, the first SSB, the second SSB, the third SSB, the fourth SSB), in the window for monitoring the RAR, the monitoring occasion (respectively, the first RAR PDCCH MO, the second RAR PDCCH MO, the third RAR PDCCH MO, the fourth RAR PDCCH MO) of the RAR PDCCH is in the time order, and the SSB index value is in one-to-one correspondence in ascending order, the DMRS of the PDCCH and the SSB corresponding to the index value are quasi co-located, that is, the DMRS of the PDCCH corresponding to the first RAR PDCCH MO and the first SSB are quasi co-located, the DMRS of the PDCCH corresponding to the second RAR PDCCH MO and the second SSB are quasi co-located, the DMRS of the PDCCH corresponding to the third RAR PDCCH MO and the third SSB are quasi co-located, and the DMRS of the PDCCH corresponding to the fourth RAR PDCCH MO and the fourth SSB are quasi co-located.

[0094] The following takes the downlink RS for determining the QCL of other downlink channels in the random access procedure by the terminal according to the detected downlink RS quasi co-located with the PDCCH for scheduling the RAR as an example to describe the method for determining the quasi co-located downlink RS provided in the embodiments of the present application.

[0095] The terminal performs the monitoring of the PDCCH for scheduling the RAR according to the corresponding quasi co-located downlink RS at multiple different PDCCH monitoring occasions within the RAR window.

[0096] The network side device can only send one RAR within the RAR window, that is, the terminal only detects the RAR PDCCH quasi co-located with a certain downlink RS. Then the terminal can take the downlink RS corresponding to the monitoring occasion of detecting the RAR as the quasi co-located downlink RS as the quasi co-located downlink RS of the following downlink channels.

[0097] b) PDSCH for transmitting the RAR (Msg2);

[0098] c) PDCCH for scheduling the retransmission of Msg3;

[0099] d) PDCCH for scheduling the contention resolution information;

[0100] e) PDSCH for transmitting the contention resolution information (i.e. Msg4 PDSCH);

[0101] f) PDCCH for the terminal to monitor in CORESET#0.

[0102] In the case that the network side device only sends one RAR within the RAR window, the network overhead can be reduced.

[0103] The following takes the downlink RS for determining the QCL of the target channel according to the explicit indication of the RAR or Msg4 as an example to describe the method for determining the quasi co-located downlink RS provided in the embodiments of the present application.

[0104] The network side device can indicate the quasi co-located downlink RS for receiving the above b), c), d), e), and f) in the RAR or the PDCCH for scheduling the RAR, which can improve the flexibility of the network side device to select different beams for downlink transmission.

[0105] One possible application scenario of the scheme is that the network side device issues multiple RARs in the RAR window, and the multiple RARs are respectively quasi co-located with different downlink RSs to ensure the reception performance of the RAR. However, for the PDCCH scheduling Msg3 retransmission, the PDCCH scheduling contention resolution information, and the PDSCH (namely, Msg4) transmitting contention resolution information, the network side device only uses one beam for transmission, that is, these downlink transmissions are only quasi co-located with one downlink RS. Therefore, the network side device needs to indicate in the RAR which downlink RS the downlink transmission is quasi co-located with.

[0106] Another possible application scenario of the scheme is that the network side device only sends one RAR. However, because the PDCCH resource or PDSCH transmission resource is limited on the RAR transmission time resource corresponding to a certain downlink RS, the network side device selects another downlink RS that is not necessarily optimal for RAR transmission. However, the network side device can indicate in the RAR the downlink RS that the subsequent b), c), d), e), and f) are quasi co-located with.

[0107] Optionally, the network side device can indicate in the Msg4 the downlink RS that the reception of f) is quasi co-located with. One possible application scenario is that the network side device indicates the terminal to perform CSI reporting in Msg3. The measurement values of the CSI reporting can include L1-RSRP, L1-SINR, CQI, etc. Different downlink RSs report corresponding measurement values. The network side device can instruct the terminal to perform the reporting through the RAR. After receiving the measurement values of different downlink RSs, the network side device can indicate the quasi co-located downlink RS of the PDCCH monitored in the CORESET#0. This method provides a method for the network side device to indicate the optimal quasi co-located downlink RS.

[0108] It should be noted that the execution subject of the quasi co-located downlink RS determination method provided in the embodiments of the present application can be a quasi co-located downlink RS determination apparatus, or a control module in the quasi co-located downlink RS determination apparatus for executing the quasi co-located downlink RS determination method. In the embodiments of the present application, the quasi co-located downlink RS determination apparatus executes the quasi co-located downlink RS determination method as an example to illustrate the quasi co-located downlink RS determination apparatus provided in the embodiments of the present application.

[0109] Figure 7 FIG. 7 is a structural schematic diagram of the quasi co-located downlink RS determination apparatus provided in the embodiments of the present application, as shown in the figure, the quasi co-located downlink RS determination apparatus 700 comprises: Figure 7

[0110] ​The determining module 701 is configured to determine a target downlink RS quasi co-located with an antenna port of a demodulation reference signal (DMRS) of a target downlink channel in a case where the terminal performs physical random access channel (PRACH) repetition transmission, and the target downlink channel includes at least one of the following channels:

[0111] a physical downlink control channel (PDCCH) used for scheduling a random access response (RAR);

[0112] a physical downlink shared channel (PDSCH) used for transmitting the RAR;

[0113] a PDCCH used for scheduling Msg3 retransmission;

[0114] a PDSCH used for transmitting contention resolution information;

[0115] a PDCCH used for scheduling the contention resolution information;

[0116] a PDCCH used for monitoring by the terminal in a control resource set (CORESET) #0.

[0117] The determining apparatus for quasi co-located downlink RS provided in the embodiments of the present application determines a target downlink RS quasi co-located with an antenna port of a DMRS of a target downlink channel in a case where PRACH repetition transmission is performed, so that the terminal only needs to monitor the target downlink channel quasi co-located with the target downlink RS, thereby saving monitoring resources and improving random access efficiency.

[0118] Optionally, the determining module 701 is specifically configured to determine, in a case where the target downlink channel includes the PDCCH used for scheduling the RAR, a target downlink RS quasi co-located with an antenna port of a DMRS of the PDCCH used for scheduling the RAR based on target information, and the target information includes at least one of the following information:

[0119] a time domain position of a monitoring occasion of the PDCCH;

[0120] at least one downlink synchronization signal / physical broadcast channel block (SSB);

[0121] at least one downlink channel state information reference signal (CSI-RS);

[0122] at least one downlink RS associated with a target random access channel opportunity (RO) in which the terminal sends a PRACH preamble.

[0123] Optionally, the at least one downlink SSB includes at least one of the following: all SSBs sent by a serving cell of the terminal; and at least one SSB associated with PRACH repetition transmission by the terminal.

[0124] Optionally, the at least one downlink CSI-RS comprises at least one of the following: all CSI-RSs associated with random access resources used by the terminal; at least one CSI-RS associated with PRACHs repeatedly sent by the terminal.

[0125] Optionally, the determining module 701 is specifically configured to, in the case that the target information comprises time domain positions of monitoring occasions of the PDCCHs, determine target downlink RSs quasi co-located with antenna ports of DMRSs of the at least one PDCCH based on at least one downlink RS associated with at least one PRACH corresponding to time domain positions of monitoring occasions of the at least one PDCCH in a RAR window, respectively; wherein the time sequence of the time domain positions of the monitoring occasions of the at least one PDCCH corresponds to the indexes of the at least one downlink RS associated with the at least one PRACH in ascending order one by one.

[0126] Optionally, the at least one downlink RS associated with a target random access channel opportunity RO in which the terminal sends a PRACH preamble comprises at least one of the following:

[0127] at least one downlink RS associated with a first RO or a last RO in a plurality of ROs in which the terminal repeatedly transmits the RO;

[0128] at least one downlink RS associated with one RO in a plurality of ROs in which the terminal repeatedly transmits the RO, indicated by a network side device;

[0129] at least one downlink RS associated with a first x downlink RSs or a last x downlink RSs in a plurality of ROs in which the terminal repeatedly transmits the RO; wherein x is greater than or equal to 1.

[0130] Optionally, the determining module 701 is specifically configured to determine a target downlink RS quasi co-located with antenna ports of DMRSs of the target downlink channel based on a downlink RS quasi co-located with the PDCCH used for scheduling the RAR.

[0131] Optionally, the determining module 701 is specifically configured to acquire a downlink RS indicated by a network side device in the PDCCH used for scheduling the RAR or the PDSCH used for transmitting the RAR; and determine a target downlink RS quasi co-located with antenna ports of DMRSs of the target downlink channel based on the acquired downlink RS indicated by the network side device in the PDCCH used for scheduling the RAR or the PDSCH used for transmitting the RAR.

[0132] Optionally, the determining module 701 is specifically configured to, in a case where the target downlink channel comprises the PDCCH used by the terminal to listen in a CORESET#0, determine a target downlink RS quasi co-located with an antenna port of a DMRS of the PDCCH used by the terminal to listen in the CORESET#0 based on a downlink RS indicated in a Msg4 sent by the network-side device.

[0133] Optionally, the apparatus further comprises:

[0134] The sending module is configured to send a Msg3 to the network-side device, wherein the Msg3 carries channel state information (CSI) of at least one downlink RS.

[0135] Optionally, the apparatus further comprises:

[0136] The listening module is configured to cause the terminal to listen to a target downlink channel quasi co-located with the target downlink RS based on the target downlink RS.

[0137] The quasi co-located downlink RS determining apparatus in the embodiments of the present application can be an apparatus, an apparatus with an operating system, or an electronic device, and can also be a component in a terminal, an integrated circuit, or a chip. The apparatus or electronic device can be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal can include, but is not limited to, the types of the terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc., and the embodiments of the present application do not make specific limitations.

[0138] The quasi co-located downlink RS determining apparatus provided in the embodiments of the present application can implement each process of the method embodiments and achieve the same technical effects, and thus repeated descriptions are not given herein. Figures 2 to 6

[0139] Figure 8 is one of structural diagrams of a terminal provided in the embodiments of the present application, as shown in Figure 8 The terminal 800 provided in the embodiments of the present application includes a processor 801, a memory 802, and a program or instruction stored in the memory 802 and executable on the processor 801. The program or instruction is executed by the processor 801 to implement each process of the quasi co-located downlink RS determining method embodiments and achieve the same technical effects, and thus repeated descriptions are not given herein.

[0140] ​The terminal provided in the embodiments of the present application also includes a processor and a communication interface, and the processor is configured to: determine a target downlink RS that is quasi-co-located with an antenna port of a DMRS of a target downlink channel in a case where the terminal performs PRACH repeated transmission; and the target downlink channel includes at least one of the following channels:

[0141] a physical downlink control channel (PDCCH) used for scheduling a random access response (RAR);

[0142] a physical downlink shared channel (PDSCH) used for transmitting the RAR;

[0143] a PDCCH used for scheduling Msg3 retransmission;

[0144] a PDSCH used for transmitting contention resolution information;

[0145] a PDCCH used for scheduling the contention resolution information;

[0146] a PDCCH used for the terminal to listen in a control resource set (CORESET) #0.

[0147] The terminal embodiment corresponds to the terminal-side method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment and achieve the same technical effects.

[0148] Figure 9 is a structural schematic diagram of a terminal provided in the embodiments of the present application, as shown in Figure 9 The terminal 900 provided in the embodiments of the present application includes but is not limited to at least part of the following components: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910, etc.

[0149] Those skilled in the art can understand that the terminal 900 can also include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 910 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. 9 The terminal structure shown in the figure does not constitute a limitation on the terminal, and the terminal can include more or fewer components than the figure, or combine certain components, or different component arrangements, which are not described here.

[0150] It should be understood that in the embodiments of the present application, the input unit 904 can include a graphics processor (GPU) 9041 and a microphone 9042. The graphics processor 9041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 can include a display panel 9061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071 is also referred to as a touch screen. The touch panel 9071 can include two parts of a touch detection device and a touch controller. The other input devices 9072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, and the like, which will not be described here.

[0151] In the embodiments of the present application, the radio frequency unit 901 receives downlink data from a network side device and processes the data by the processor 910. In addition, the radio frequency unit 901 sends uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

[0152] The memory 909 can be used to store software programs or instructions and various data. The memory 909 can mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area can store an operating system, at least one application program or instruction required by a function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 909 can include a high-speed random access memory, and can also include a non-volatile memory, which can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. For example, at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device.

[0153] The processor 910 can include one or more processing units; optionally, the processor 910 can integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and an application program or instruction, and the modem processor mainly processes wireless communication, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 910.

[0154] The processor 910 is configured to determine a target downlink RS quasi co-located with an antenna port of a demodulation reference signal (DMRS) of a target downlink channel in a case that the terminal performs physical random access channel (PRACH) repetition transmission, and the target downlink channel includes at least one of the following channels:

[0155] a physical downlink control channel (PDCCH) used for scheduling a random access response (RAR);

[0156] a physical downlink shared channel (PDSCH) used for transmitting the RAR;

[0157] a PDCCH used for scheduling Msg3 retransmission;

[0158] a PDSCH used for transmitting contention resolution information;

[0159] a PDCCH used for scheduling the contention resolution information;

[0160] a PDCCH monitored by the terminal in a control resource set (CORESET) #0.

[0161] In a case of PRACH repetition transmission, the terminal determines a target downlink RS quasi co-located with an antenna port of a DMRS of a target downlink channel, so that the terminal only needs to monitor the target downlink channel quasi co-located with the target downlink RS, thereby saving monitoring resources and improving random access efficiency.

[0162] Optionally, the processor 910 is further configured to, in a case that the target downlink channel includes the PDCCH used for scheduling the RAR, determine a target downlink RS quasi co-located with an antenna port of a DMRS of the PDCCH used for scheduling the RAR based on target information, and the target information includes at least one of the following information:

[0163] a time domain position of a monitoring occasion of the PDCCH;

[0164] at least one downlink synchronization signal / physical broadcast channel block (SSB);

[0165] at least one downlink channel state information reference signal (CSI-RS);

[0166] at least one downlink RS associated with a target random access channel opportunity (RO) in which the terminal transmits a PRACH preamble.

[0167] Optionally, the at least one downlink SSB includes at least one of the following: all SSBs transmitted by a serving cell of the terminal; and at least one SSB associated with PRACH repetition transmission by the terminal.

[0168] Optionally, the at least one downlink CSI-RS comprises at least one of: all CSI-RSs associated with random access resources used by the terminal; at least one CSI-RS associated with PRACHs repeatedly sent by the terminal.

[0169] Optionally, the processor 910 is further configured to: in a case where the target information comprises time domain positions of monitoring occasions of the PDCCHs, determine target downlink RSs quasi co-located with antenna ports of DMRSs of the at least one PDCCH respectively based on at least one downlink RS associated with at least one PRACH corresponding to a time domain position of a monitoring occasion of the at least one PDCCH in a RAR window.

[0170] Optionally, a time sequence of the time domain positions of the monitoring occasions of the at least one PDCCH corresponds to an ascending order of indexes of the at least one downlink RS associated with the at least one PRACH one by one.

[0171] Optionally, the at least one downlink RS associated with a target random access channel opportunity RO in which the terminal sends a PRACH preamble comprises at least one of:

[0172] at least one downlink RS associated with a first RO or a last RO in a plurality of ROs in which the terminal repeatedly transmits the RO;

[0173] at least one downlink RS associated with one RO in a plurality of ROs in which the terminal repeatedly transmits the RO indicated by the network side device;

[0174] at least one downlink RS associated with a first x downlink RSs or a last x downlink RSs in a plurality of ROs in which the terminal repeatedly transmits the RO; wherein x is greater than or equal to 1.

[0175] Optionally, the processor 910 is further configured to: determine a target downlink RS quasi co-located with antenna ports of DMRSs of the target downlink channel based on a downlink RS quasi co-located with the PDCCH used for scheduling the RAR.

[0176] Optionally, the processor 910 is further configured to: acquire a downlink RS indicated by the network side device in the PDCCH used for scheduling the RAR or the PDSCH used for transmitting the RAR; and determine a target downlink RS quasi co-located with antenna ports of DMRSs of the target downlink channel based on the acquired downlink RS indicated by the network side device in the PDCCH used for scheduling the RAR or the PDSCH used for transmitting the RAR.

[0177] Optionally, the processor 910 is further configured to: in a case where the target downlink channel comprises the PDCCH used by the terminal to monitor in a CORESET#0, determine a target downlink RS quasi co-located with an antenna port of a DMRS of the PDCCH used by the terminal to monitor in the CORESET#0 based on a downlink RS indicated in a Msg4 sent by the network side device.

[0178] Optionally, the radio frequency unit 901 is configured to: send a Msg3 to the network side device; and wherein the Msg3 carries channel state information (CSI) of at least one downlink RS.

[0179] Optionally, the processor 910 is further configured to: monitor a target downlink channel quasi co-located with the target downlink RS based on the target downlink RS.

[0180] Embodiments of the present application further provide a readable storage medium having a program or instructions stored thereon, which, when executed by a processor, implement each process of the above-mentioned quasi co-located downlink RS determination method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0181] The processor is the processor in the terminal in the above-mentioned embodiments. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0182] Embodiments of the present application further provide a chip including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement each process of the above-mentioned quasi co-located downlink RS determination method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0183] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system on chip, a chip system or a system on chip, etc.

[0184] Embodiments of the present application further provide a computer program / program product stored in a non-transitory storage medium, which is executed by at least one processor to implement each process of the above-mentioned quasi co-located downlink RS determination method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0185] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations 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 can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by more than one process, method, article, or apparatus either simultaneously, concurrently, or with intervening action that are carried out at the same time, either in a simultaneous fashion or in a fashion that is carried out sequentially. For example, the method described herein can be carried out by one or more of the processes described herein, either in a simultaneous fashion or in a fashion that is carried out sequentially. Also, the features described with respect to some examples can be combined in other examples.

[0186] From the above description of the embodiments, it is apparent that the above-mentioned method can be realized by means of software plus necessary universal hardware platforms, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and include a plurality of instructions for making a terminal (which can be a mobile phone, computer, server, or network equipment, etc.) execute the method described in each embodiment of the present application.

[0187] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A method for determining a quasi-co-located downlink reference signal RS, characterized in that, include: When the terminal performs repeated transmissions of the Physical Random Access Channel (PRACH), the terminal determines the target downlink reference signal RS that is co-located with the antenna port of the demodulation reference signal DMRS of the target downlink channel; wherein, the target downlink channel includes: the Physical Downlink Control Channel (PDCCH) for scheduling the Random Access Response (RAR); The terminal determines the target downlink reference signal RS with the antenna port quasi-co-located QCL of the demodulation reference signal DMRS of the target downlink channel, including: When the target downlink channel includes the PDCCH used for scheduling RAR, the terminal determines the target downlink RS with the antenna port quasi-co-located DMRS of the PDCCH used for scheduling RAR based on target information; wherein, the target information includes: the time domain location of the monitoring occasion of the PDCCH; The terminal determines the target downlink RS with quasi-co-located antenna ports of the DMRS of the PDCCH used for scheduling RAR based on the target information, including: when the target information includes the time domain location of the monitoring occasion of the PDCCH, the terminal determines the target downlink RS with quasi-co-located antenna ports of the DMRS of the at least one PDCCH based on the downlink RS associated with at least one PRACH corresponding to the time domain location of the monitoring occasion of at least one PDCCH in the RAR window; The temporal order of the time domain position of the monitoring occasion of the at least one PDCCH corresponds one-to-one with the index of the downlink RS associated with the at least one PRACH in ascending order.

2. The method for determining the quasi-co-located downlink reference signal RS according to claim 1, characterized in that, The target information also includes at least one of the following: The temporal location of the PDCCH monitoring occasion; At least one downlink synchronization signal / physical broadcast channel block (SSB); At least one downlink channel state information reference signal (CSI-RS); The terminal transmits at least one downlink RS associated with the target random access channel opportunity (RO) of the PRACH preamble.

3. The method for determining the quasi-co-located downlink reference signal RS according to claim 2, characterized in that, The at least one downlink SSB includes at least one of the following: All SSBs sent by the serving cell of the terminal; The terminal repeatedly transmits at least one SSB associated with PRACH.

4. The method for determining the quasi-co-located downlink reference signal RS according to claim 2, characterized in that, The at least one downlink CSI-RS includes at least one of the following: All CSI-RS associated with the random access resources used by the terminal; The terminal repeatedly transmits at least one CSI-RS associated with PRACH.

5. The method for determining the quasi-co-located downlink reference signal RS according to claim 2, characterized in that, The terminal transmits at least one downlink RS associated with the target random access channel opportunity (RO) of the PRACH preamble, including at least one of the following: The terminal performs repeated RO transmissions with at least one downlink RS associated with the first or last RO among a plurality of ROs; The network-side device indicates that the terminal performs RO repeated transmissions to at least one downlink RS associated with one of a plurality of ROs; The terminal performs repeated RO transmissions of the first x downlink RSs or the last x downlink RSs associated with multiple ROs; where x is greater than or equal to 1.

6. The method for determining the quasi-co-located downlink reference signal RS according to claim 2, characterized in that, The terminal determines the target downlink reference signal RS with the antenna port quasi-co-located QCL of the demodulation reference signal DMRS of the target downlink channel, including: The terminal determines the target downlink RS that is quasi-co-located with the antenna port of the DMRS of the target downlink channel based on the detected downlink RS that is quasi-co-located with the PDCCH used for scheduling RAR.

7. The method for determining the quasi-co-located downlink reference signal RS according to claim 2, characterized in that, The terminal determines the target downlink reference signal RS with the antenna port quasi-co-located QCL of the demodulation reference signal DMRS of the target downlink channel, including: The terminal obtains the downlink RS indicated by the network-side device in the PDCCH used for scheduling RAR or the PDSCH used for transmitting RAR; The terminal determines the target downlink RS that is quasi-co-located with the antenna port of the DMRS of the target downlink channel based on the downlink RS indicated by the network-side device in the PDCCH for scheduling RAR or the PDSCH for transmitting RAR.

8. The method for determining the quasi-co-located downlink reference signal RS according to claim 1, characterized in that, The terminal determines the target downlink reference signal RS with the antenna port quasi-co-located QCL of the demodulation reference signal DMRS of the target downlink channel, including: When the target downlink channel includes a PDCCH for the terminal to listen to in the control resource set CORESET#0, the terminal determines a target downlink RS with an antenna port quasi-co-located with the DMRS for the PDCCH for the terminal to listen to in the CORESET#0 based on the downlink RS indicated in Msg4 sent by the network-side device.

9. The method for determining the quasi-co-located downlink reference signal RS according to claim 8, characterized in that, Before the terminal determines the target downlink RS quasi-co-located with the DMRS of the PDCCH that the terminal listens for in CORESET#0, based on the downlink RS indicated in Msg4 sent by the network-side device, the method further includes: The terminal sends Msg3 to the network-side device; wherein, Msg3 carries channel state information (CSI) of at least one downlink RS.

10. The method for determining the quasi-co-located downlink reference signal RS according to claim 1, characterized in that, The method further includes: The terminal monitors the target downlink channel that is quasi-co-located with the target downlink RS based on the target downlink RS.

11. A device for determining a quasi-co-located downlink reference signal RS, characterized in that, include: The determination module is used to determine the target downlink reference signal RS of the antenna port quasi-co-located QCL with the demodulation reference signal DMRS of the target downlink channel when the terminal performs repeated transmission of the physical random access channel PRACH; wherein, the target downlink channel includes: physical downlink control channel PDCCH for scheduling random access response RAR; The determining module is specifically used to, when the target downlink channel includes the PDCCH used for scheduling RAR, determine, based on target information, a target downlink RS that is quasi-co-located with the antenna port of the DMRS used for scheduling RAR; wherein, the target information includes: the time domain location of the monitoring occasion of the PDCCH; The determining module is specifically used to determine, when the target information includes the time domain location of the monitoring occasion of the PDCCH, the terminal determines the target downlink RS with antenna port quasi-co-located with the DMRS of the at least one PDCCH based on the downlink RS associated with the time domain location of the monitoring occasion of at least one PDCCH in the RAR window. The temporal order of the time domain position of the monitoring occasion of the at least one PDCCH corresponds one-to-one with the index of the downlink RS associated with the at least one PRACH in ascending order.

12. A terminal, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method for determining the quasi-co-located downlink reference signal RS as described in any one of claims 1-10.

13. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the method for determining the quasi-co-located downlink reference signal RS as described in any one of claims 1-10.

Images