CN117715228A

CN117715228A - Method, device and terminal for determining quasi co-location parameters

Info

Publication number: CN117715228A
Application number: CN202211079943.9A
Authority: CN
Inventors: 吴凯; 潘学明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2024-03-15
Also published as: WO2024051539A1

Abstract

The application discloses a method, a device and a terminal for determining quasi co-location parameters, which belong to the field of communication, and the method for determining quasi co-location parameters in the embodiment of the application comprises the following steps: the terminal sends X physical random access channels PRACH and acquires a first monitoring time; wherein the first monitoring time is located at the overlapping time of monitoring windows corresponding to Y PRACH in the X PRACH, and X and Y are positive integers greater than 1; the terminal determines a first reference signal corresponding to the first monitoring occasion; the terminal uses quasi co-location parameters corresponding to the first reference signal to perform first downlink reception at the first monitoring opportunity.

Description

Method, device and terminal for determining quasi co-location parameters

Technical Field

The application belongs to the technical field of communication, and particularly relates to a method, a device and a terminal for determining quasi co-location parameters.

Background

The physical random access channel (Physical Random Access Channel, PRACH) retransmission is a method for improving PRACH coverage, and one method for implementing PRACH retransmission is that a terminal (also referred to as User Equipment (UE)) may initiate multiple independent PRACH transmission flows.

Under the condition that only one PRACH transmission flow is initiated, the assumption of the terminal for receiving the random access response (Random Access Response, RAR) and the physical downlink control channel (Physical Downlink Control Channel, PDCCH) for scheduling the RAR is determined, namely, when the PRACH flow is initiated, the beam corresponding to the reference signal associated with the PRACH resource is selected. While multiple independent PRACH procedures may cause the UE to need to receive the PDCCH of the scheduled RAR in multiple independent RAR windows, multiple RAR windows may overlap, so that the assumption of the beam transmitted by the PDCCH of the scheduled RAR received by the terminal is ambiguous, which may cause unclear reception behavior or degradation of reception performance.

Disclosure of Invention

The embodiment of the application provides a method, a device and a terminal for determining quasi co-location parameters, which can solve the problems that when RAR windows overlap, the assumption of a beam sent by a PDCCH (physical downlink control channel) for scheduling RAR received by the terminal is ambiguous, and the receiving behavior is unclear or the receiving performance is reduced.

In a first aspect, a method for determining a quasi co-location parameter is provided, and the method is applied to a terminal, and includes:

the terminal sends X physical random access channels PRACH and acquires a first monitoring time; wherein the first monitoring time is located at the overlapping time of monitoring windows corresponding to Y PRACH in the X PRACH, and X and Y are positive integers greater than 1;

The terminal determines a first reference signal corresponding to the first monitoring occasion;

the terminal uses quasi co-location parameters corresponding to the first reference signal to perform first downlink reception at the first monitoring opportunity.

In a second aspect, a device for determining a quasi co-location parameter is provided, including:

a sending module, configured to send X physical random access channels PRACH, and obtain a first listening opportunity; wherein the first monitoring time is located at the overlapping time of monitoring windows corresponding to Y PRACH in the X PRACH, and X and Y are positive integers greater than 1;

an execution module configured to determine a first reference signal corresponding to the first listening occasion;

and the receiving module is used for performing first downlink receiving at the first monitoring opportunity by using the quasi co-location parameter corresponding to the first reference signal.

In a third 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 fourth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to determine a first reference signal corresponding to the first listening occasion, and the communication interface is configured to send X physical random access channels PRACH and obtain a first listening occasion; and performing first downlink reception at the first monitoring opportunity by using a quasi co-location parameter corresponding to the first reference signal.

In a fifth aspect, a system for determining quasi co-location parameters is provided, including: the terminal and the network side device, the terminal can be used for executing the steps of the quasi co-location parameter determining method according to the first aspect.

In a sixth 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 a seventh aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being configured to execute programs or instructions for implementing the method according to the first aspect.

In an eighth aspect, a computer program/program product is provided, stored in a storage medium, which is executed by at least one processor to implement the steps of the method of determining a quasi co-sited parameter according to the first aspect.

In the embodiment of the application, X physical random access channels PRACH are sent through a terminal, and a first monitoring time is obtained; wherein, the first monitoring time is located at the overlapping time of the monitoring windows corresponding to Y PRACH in the X PRACH; the terminal determines a first reference signal corresponding to the first monitoring occasion; the terminal uses the quasi co-located parameter corresponding to the first reference signal to perform first downlink reception at the first monitoring time, so that the overlapping part in the RAR window defines the reference signal corresponding to the quasi co-located parameter for downlink reception, so that the terminal can simply and definitely determine a receiving beam, and receive downlink channels related to RAR, which are transmitted by network side equipment in different beams, by using the receiving beam which is more suitable in the whole.

Drawings

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

fig. 2 is a flow chart of a method for determining quasi co-location parameters according to an embodiment of the present application;

fig. 3 is a schematic diagram of a PRACH procedure provided in an embodiment of the present application;

fig. 4 is a schematic diagram of another PRACH procedure provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a device for determining quasi co-location parameters according to an embodiment of the present application;

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

fig. 7 is a schematic structural diagram of a terminal for implementing an embodiment of the present application.

Detailed Description

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, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects 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 terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may 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 is noted that the techniques described in 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 FrequencyDivision Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present 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 embodiments of the present application are 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.. Note 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 transmitting/receiving point (TransmittingReceivingPoint, 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 embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited. The core network device may include, but is not limited to, at least one of: a core network node, a core network function, a mobility management entity (Mobility Management Entity, MME), an access mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF), a user plane function (User Plane Function, UPF), a policy control function (Policy Control Function, PCF), a policy and charging rules function (Policy and Charging Rules Function, PCRF), an edge application service discovery function (EdgeApplicationServerDiscoveryFunction, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), a home subscriber server (Home Subscriber Server, HSS), a centralized network configuration (Centralized network configuration, CNC), a network storage function (Network Repository Function, NRF), a network opening function (NetworkExposureFunction, NEF), a local NEF (LocalNEF, or L-NEF), a binding support function (Binding Support Function, BSF), an application function (Application Function, AF), and the like. In the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited.

The method, the device and the terminal for determining the quasi co-location parameter provided by the embodiment of the application are described in detail below by means of some embodiments and application scenes thereof with reference to the accompanying drawings.

As shown in fig. 2, the embodiment of the present application provides a method for determining a quasi co-location parameter, where the execution body of the method is a terminal, in other words, the method may be executed by software or hardware installed in the terminal. The method comprises the following steps.

S210, a terminal sends X physical random access channels PRACH and acquires a first monitoring time; wherein the first monitoring time is located at the overlapping time of monitoring windows corresponding to Y PRACH in the X PRACH, and X and Y are positive integers greater than 1.

After PRACH transmission, the terminal starts a listening window, where the listening window is used to listen to a downlink channel related to an RAR sent by a network side device, for example, a PDCCH for scheduling the RAR, a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) for transmitting the RAR, a PDCCH scrambled with a temporary cell radio network temporary identifier (Temporary Cell Radio Network Temporary Identifier, TC-RNTI), and the like, and the listening window may also be referred to as a random access response window (RARwindow), and for simplicity, the following embodiments will take the RARwindow as an example of the listening window. Each RARwindow may include a plurality of listening occasions (monitoring occasion), and the terminal listens to the downlink channel related to RAR sent by the network side device in each listening occasion.

Under the condition that the terminal triggers X independent PRACH processes to realize PRACH repeated transmission, each PRACH has independent RARwindow to monitor the downlink channel related to the RAR. If the rarwindows corresponding to the Y PRACH overlap, at a first listening occasion where the overlapping time is located, since the network side device may send related downlink channels of RAR for different PRACHs, the terminal does not determine a beam used when the network side device sends the related downlink channels of RAR, that is, the terminal does not determine a first reference signal corresponding to a Quasi co-location (QCL) parameter adopted when the terminal performs first downlink reception in the first listening occasion.

Alternatively, the first reference signal may be a synchronization information block (Synchronization Signal and PBCH block, SSB), or a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), or the like.

As shown in fig. 3, the rarwindows corresponding to the two PRACH are partially overlapped, as shown in the dashed box part shown in fig. 3, the downlink reference signals associated with the two PRACH are ssb#0 and ssb#1 respectively, and the listening time at the overlapped part of the two rarwindows is the first listening time.

S220, the terminal determines a first reference signal corresponding to the first monitoring occasion.

The first reference signal corresponding to the first monitoring occasion may include a downlink reference signal associated with a PRACH procedure corresponding to the first monitoring occasion.

The manner in which the terminal determines the first reference signal may be various, in an embodiment, the first reference signal is one of L downlink reference signals associated with the Y PRACH, where L is a positive integer less than or equal to Y, and the first reference signal may be any one of the L downlink reference signals, specifically, may be a downlink reference signal with a largest or smallest index value in the L downlink reference signals, or a downlink reference signal associated with the PRACH that is transmitted earliest or latest in the Y PRACH.

In another embodiment, the first reference signal may be a first downlink reference signal, where the first downlink reference signal is a downlink reference signal configured by a network side device.

Optionally, the downlink reference signal configured by the network side device may be transmitted by using a wide beam, where in the case where the first reference signal is the downlink reference signal configured by the network side device, the terminal may perform first downlink reception for the wide beam, so that relatively good performance may be achieved, and a downlink channel related to an RAR corresponding to a PRACH associated with a downlink reference signal of a different narrow beam is received.

Optionally, the first downlink reference signal is a first downlink reference signal corresponding to the L downlink reference signals in M first downlink reference signals configured by the network side device, where M is a positive integer. For example, the network side device may indicate, through configuration information, one or more downlink reference signals that may be used as the first reference signal in each R downlink reference signals, and when RAR windows corresponding to PRACH associated with the R downlink reference signals overlap, use one downlink reference signal or one of multiple downlink reference signals of the indication as the first reference signal.

The terminal may send multiple independent PRACH on the same carrier or on the same serving cell, or may be on different carriers or on different serving cells.

In another embodiment, the first reference signal may be a downlink reference signal on a first carrier, where the first carrier is a carrier configured by a network side device in a carrier where the Y PRACH is sent or a predefined carrier, and the first carrier may be a carrier that supplements an Uplink (Supplementary Uplink, SUL) or a carrier of a Normal Uplink (NUL).

Optionally, in the case that the network side device configures the SUL, the terminal sends the Y PRACH may be on a carrier of the SUL or on a carrier of the NUL, where the first carrier is a carrier of the SUL or a carrier of the NUL indicated by the network side device, and the first reference signal is a downlink reference signal on a carrier of the SUL or a carrier of the NUL indicated by the network side device.

In another embodiment, the first reference signal may be a downlink reference signal on a first serving cell, where the first serving cell is a serving cell in which the carrier aggregation where the Y PRACH are sent.

Under the condition that the network side equipment is configured with carrier aggregation, the terminal can have K service cells, wherein K is a positive integer, and each service cell can correspond to different uplink carriers. Optionally, the first serving cell is a serving cell determined based on at least one of the following in a case that the network side device configures K serving cells of carrier aggregation:

the cell with the lowest or highest cell identifier (cell index), that is, the first reference signal may be a downlink reference signal on the serving cell with the lowest or highest cell identifier in the K serving cells;

The activated cells, that is, the first reference signal may be downlink reference signals on activated cells in the K cells, and optionally, the first reference signal may be downlink reference signals on activated cells with lowest or highest cell identification in the K cells;

a non-dormant (non-dorman) cell, that is, the first reference signal may be a downlink reference signal on a non-dormant serving cell of the K serving cells, or alternatively, the first reference signal may be a downlink reference signal on a non-dormant serving cell with a lowest or highest cell identifier of the K serving cells; the dormant cell may also be considered an active serving cell, but the terminal may transmit or receive only a limited amount or no amount on the serving cell.

A Primary cell (PCell), i.e., the first reference signal may be a downlink reference signal on the PCell in the K serving cells;

a primary secondary cell (Primary Secondary Cell Group Cell, PSCell), i.e. the first reference signal may be a downlink reference signal on a PSCell of the K serving cells;

The cell with the lowest or highest frequency, that is, the first reference signal may be a downlink reference signal on the cell with the lowest or highest frequency of the K cells, or alternatively, the first reference signal may be a downlink reference signal on the cell with the lowest or highest frequency of the activated cells or non-dormant cells of the K cells.

In another embodiment, the first reference signal may be a second downlink reference signal, and the second downlink reference signal is a downlink reference signal determined by the terminal.

It should be noted that, in the foregoing embodiment, the downlink reference signal on the first carrier or the downlink reference signal on the first serving cell may be a downlink reference signal associated with the PRACH sent on the first carrier or the first serving cell, or the downlink reference signal indicated by the network side device on the first carrier or the first serving cell.

In one embodiment, the terminal may use quasi co-sited parameters corresponding to the same downlink reference signal on multiple carriers or serving cells to perform the reception of the RAR-related downlink channel.

S230, the terminal uses quasi co-location parameters corresponding to the first reference signal to perform first downlink reception at the first monitoring occasion. The terminal assumes that an antenna port of a demodulation reference signal (Demodulation Reference Signal, DMRS) of a downlink channel received in a first listening occasion and the first reference signal are quasi co-located.

Optionally, the first downlink receiving is configured to receive at least one of the following downlink channels:

a first physical downlink control channel PDCCH, the first PDCCH being a PDCCH for scheduling the RAR, the first PDCCH may also be a PDCCH scrambled using a random access network temporary identity (Random Access Radio Network Temporary Identifier, RA-RNTI);

a first physical downlink shared channel, PDSCH, the first PDSCH being a PDSCH for transmitting the RAR;

and a second Physical Downlink Control Channel (PDCCH), wherein the second PDCCH is a PDCCH scrambled by using a temporary cell radio network temporary identifier (TC-RNTI).

Since the terminal does not determine which of the Y PRACHs the first PDCCH received by the network side device in the first downlink reception is for, and different PRACHs may be used for different RA-RNTIs when different Random Access channel occasions (Random Access ChannelOccasion, RO) are transmitted. Optionally, step S230 includes the terminal monitoring a PDCCH for scheduling RAR using RA-RNTI corresponding to the Y PRACHs.

In an embodiment, in a case that the terminal receives the first PDCCH, the terminal determines that the second reference signal corresponding to the quasi co-located parameter used for performing third downlink reception may be the first reference signal, where the third downlink reception is used for receiving at least one downlink channel of the first PDSCH, the second PDCCH, and the second PDSCH is a PDSCH scheduled by the second PDCCH. When receiving the first PDSCH according to the first PDCCH, the terminal uses the same quasi co-location parameter or the same quasi co-location parameter corresponding to the first reference signal as that of the first PDCCH.

In another manner, since different ROs correspond to different RA-RNTIs, in case of receiving a first PDCCH, the terminal may determine PRACH corresponding to the first PDCCH after determining RA-RNTIs corresponding to the first PDCCH, i.e., after detecting the first PDCCH using the RA-RNTIs. At this time, the terminal determines that the second reference signal corresponding to the quasi co-located parameter used for performing the third downlink reception may be a downlink reference signal associated with the RO corresponding to the RA-RNTI corresponding to the detected first PDCCH. When the terminal receives the first PDSCH according to the indication of the first PDCCH, the terminal may determine a corresponding PRACH according to an RA-RNTI corresponding to the first PDCCH, and receive the first PDSCH using a quasi co-sited parameter corresponding to a downlink reference signal associated with the corresponding PRACH.

After determining the second reference signal, the terminal may perform the third downlink reception at a second listening occasion according to the quasi co-location parameter of the third reference signal.

Optionally, the second listening occasion may be a first listening occasion, or may be a downlink receiving occasion corresponding to one PRACH of the Y PRACHs.

It should be noted that, the network side device may configure information to the terminal in advance, so that the terminal may initiate the X independent PRACH flows and execute the method described in the embodiments of the present application.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, X physical random access channels PRACH are sent by a terminal, and a first listening opportunity is obtained; wherein, the first monitoring time is located at the overlapping time of the monitoring windows corresponding to Y PRACH in the X PRACH; the terminal determines a first reference signal corresponding to the first monitoring occasion; the terminal uses the quasi co-located parameter corresponding to the first reference signal to perform first downlink reception at the first monitoring time, so that the overlapping part in the RAR window defines the reference signal corresponding to the quasi co-located parameter for downlink reception, so that the terminal can simply and definitely determine a receiving beam, and receive downlink channels related to RAR, which are transmitted by network side equipment in different beams, by using the receiving beam which is more suitable in the whole.

Based on the above embodiment, when the terminal performs the first downlink reception at the first listening occasion, the second downlink reception may overlap with the second downlink reception of the terminal, where the second downlink reception is a downlink reception unrelated to the PRACH procedure, and is a downlink reception for receiving a second downlink channel, and the second downlink channel may be other downlink channels except for the downlink channel of the first downlink reception, and specifically may be a PDCCH or a PDSCH.

Alternatively, the other downlink channel may be a PDCCH monitored in the User specific search space set (User-specific search Spaceset, USSset), or a PDSCH scheduled by the PDCCH, or a reception of SSB or CSI-RS.

In one embodiment, in a case where the first downlink reception and the second downlink reception overlap, the first reference signal is a reference signal corresponding to a quasi co-location parameter used by the second downlink reception.

In another embodiment, when the first downlink reception and the second downlink reception overlap, and the reference signal corresponding to the quasi co-sited parameter used by the second downlink reception is one of the L downlink reference signals associated with the Y PRACH, the first reference signal is the reference signal corresponding to the quasi co-sited parameter used by the second downlink reception; the second downlink reception is a downlink reception for receiving a second downlink channel, and the second downlink channel is other downlink channels except the downlink channel of the first downlink reception.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by determining the first reference signal in combination with the reference signal corresponding to the quasi co-location parameter used in the second downlink reception under the condition that the first downlink reception and the second downlink reception overlap, performance of the second downlink reception can be ensured, and the influence of the first downlink reception on the second downlink reception is reduced as much as possible.

Based on the above embodiment, optionally, after step S230, the method further includes:

and the terminal transmits a message 3 (Msg 3) by using the quasi co-location parameter corresponding to the third reference signal according to the first downlink receiving instruction, namely, the terminal can determine the transmission beam of the Msg3 according to the first downlink receiving, and determine which downlink reference signal is received by using the spatial transmission filter for transmitting the Msg3 to correspond to the beam, so that the same spatial filter is used for transmitting.

The third reference signal may be the same as the first reference signal in the above embodiment, and in an implementation manner, the third reference signal may be the first reference signal corresponding to the quasi co-location parameter used for the first downlink reception, which is specifically one of the following:

one of L downlink reference signals associated with the Y PRACH, where L is smaller than or equal to a positive integer of Y, for example, a downlink reference signal with the largest or smallest index value in the L downlink reference signals or a downlink reference signal associated with the PRACH that is transmitted earliest or latest in the Y PRACH;

a first downlink reference signal, where the first downlink reference signal is a downlink reference signal configured by a network side device;

And the second downlink reference signal is a downlink reference signal determined by the terminal.

In another embodiment, the third reference signal may be determined according to the received first PDCCH, and the third reference signal is one of the following:

and a downlink reference signal associated with a random reception opportunity RO corresponding to the RA-RNTI corresponding to the received first PDCCH. As described above, the beam used by the terminal when receiving the first PDCCH may be different from the beam used by the network side device to actually transmit the first PDCCH, and the terminal may determine the PRACH to which the first PDCCH actually responds according to the RA-RNTI, thereby determining the beam used by the first PDCCH, that is, the downlink reference signal quasi co-located with the first PDCCH. For this reason, when the terminal transmits Msg3, it may transmit using a transmit beam corresponding to a quasi co-located parameter corresponding to the downlink reference signal quasi co-located by the first PDCCH, that is, using a spatial transmit filter corresponding to the downlink reference signal quasi co-located by the first PDCCH.

A downlink reference signal associated with a Preamble (Preamble) indicated by a received first PDSCH. Since different ROs may correspond to the same RA-RNTI, and the ROs may simultaneously correspond to two different downlink reference signals, the Preamble identities (Preamble IDs) associated with the different downlink reference signals are different. I.e. the PRACH possibly transmitted on both ROs are associated with different downlink reference signals, but the first PDCCH is the same RA-RNTI. At this time, the terminal cannot determine the downlink reference signal quasi co-located with the first PDCCH only according to the RA-RNTI. The terminal may further determine a downlink reference signal associated with the PRACH according to PRACH preamble ID information in the first PDSCH. Thus, when Msg3 transmission is performed, transmission is performed using a transmit beam corresponding to the quasi co-located parameter of the downlink reference signal, that is, a spatial transmit filter corresponding to the downlink reference signal.

Optionally, the method further comprises: message 4 (Msg 4) is received using the quasi co-sited parameter corresponding to the third reference signal.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, the terminal sends the Msg3 by using the quasi co-sited parameter corresponding to the third reference signal according to the first downlink receiving instruction, so that the terminal may use a correct beam when sending the Msg 3.

Based on the above embodiment, optionally, before the terminal sends X PRACH, the method further includes:

and determining the value of X and the reference signal packet corresponding to each PRACH according to the length of the monitoring window so that the monitoring windows corresponding to the X PRACH are not overlapped.

For simplicity, SSB is taken as a reference signal in the following examples.

As shown in fig. 4, the starting time point of the RARwindow is the starting boundary of the slot where the first resource control set (Control resource set, core) core#0 is located after the PRACH is transmitted, and the lengths of the SSBs and ROs are the same.

And configuring a plurality of ROs on the uplink time slot, wherein an association relationship exists between the ROs and the SSBs actually transmitted. Multiple SSBs may be associated with one RO, or multiple SSBs may be associated with 1 RO.

After receiving the SSB and acquiring the cell synchronization and system messages, the terminal can determine the number of SSBs and the configuration of ROs in the cell, and determine SSB packets. The method specifically comprises the following steps:

as shown in fig. 4, ROs of the same RARwindow are grouped, and ROs #0 to RO #3 in the same uplink slot are grouped.

Based on the association relationship between ROs and SSBs, SSB packets associated with each RO packet are determined, as shown in fig. 4, wherein the former RO packet is associated with ssb#0 to ssb#3, and the latter RO packet is associated with ssb#4 to ssb#7.

The terminal may select one SSB within the SSB packet and transmit the PRACH on the corresponding RO.

The manner of selecting one SSB from the SSB packet may be varied, for example, threshold selection may be performed according to the correlation, for example, SSBs whose signal quality exceeds a predefined or preconfigured threshold may be selected from the SSB packet, and if there are multiple SSBs whose signal quality exceeds the threshold, one of the SSBs may be selected according to the terminal, or the SSB with the best signal quality may be selected; if the signal quality of all SSBs within the SSB packet is below a predefined or preconfigured threshold, then one SSB may be randomly selected or the PRACH may not be transmitted. The signal quality may be a synchronization signal based reference signal received power (Synchronization Signal based Reference Signal Received Power, SS-RSRP).

If there is an uplink slot and there is an RO in the on time of the RAR window, the SSB packet corresponding to the RO cannot be used to transmit the PRACH.

The terminal may select a plurality of ROs within one SSB to RO association period (association period) or association mode period (association pattern period) according to the above rule, and ensure that rarwindows corresponding to the ROs do not overlap each other.

The terminal selects one SSB from SSB packets according to the signal quality of each SSB to execute a corresponding PRACH procedure, and can determine the subsequent N SSBs according to the first selected SSB and the RAR window under the condition of ensuring that the RAR windows do not overlap each other, where the number of N is not greater than the association period/RAR window length or not greater than the association mode period/RAR window length.

According to the method, when a plurality of independent PRACH are initiated, the number of the sent PRACH and the RO corresponding to each PRACH are determined according to the length of the monitoring window, so that the monitoring windows corresponding to the PRACH are not overlapped, or a first monitoring time for executing first downlink reception does not exist, the terminal can perform downlink reception according to quasi-co-address parameters corresponding to reference signals associated with the PRACH in the monitoring window corresponding to each PRACH, and the method based on the embodiment does not need to determine a first reference signal corresponding to the first monitoring time and is used for performing first downlink reception. If the terminal cannot meet the requirements of the embodiments of the present application when initiating a plurality of independent PRACHs, and there is an overlap in the listening windows corresponding to the X PRACHs, a first listening opportunity is acquired, a first reference signal corresponding to the first listening opportunity is determined, and all the method embodiments described above may be executed.

In the method for determining the quasi co-location parameter provided in the embodiment of the present application, the execution body may be a device for determining the quasi co-location parameter. In the embodiment of the present application, the method for determining the quasi co-location parameter by using the quasi co-location parameter determining device is taken as an example, and the quasi co-location parameter determining device provided in the embodiment of the present application is described.

As shown in fig. 5, the device for determining the quasi co-location parameter includes: a transmitting module 501, an executing module 502 and a receiving module. The sending module 501 is configured to send X physical random access channels PRACH and obtain a first listening opportunity; wherein the first monitoring time is located at the overlapping time of monitoring windows corresponding to Y PRACH in the X PRACH, and X and Y are positive integers greater than 1; the executing module 502 is configured to determine a first reference signal corresponding to the first listening occasion; the receiving module 503 is configured to perform a first downlink reception at the first listening opportunity using a quasi co-sited parameter corresponding to the first reference signal.

a first physical downlink control channel PDCCH, the first PDCCH being a PDCCH for scheduling the RAR;

Optionally, the first reference signal is one of:

one of L downlink reference signals associated with the Y PRACH, wherein L is a positive integer less than or equal to Y;

a downlink reference signal on a first carrier, wherein the first carrier is a carrier configured by network side equipment in a carrier where the Y PRACH are sent;

a downlink reference signal on a first serving cell, wherein the first serving cell is a serving cell for transmitting carrier aggregation where the Y PRACH are located;

and a second downlink reference signal, where the second downlink reference signal is a downlink reference signal determined by the quasi co-location parameter determining device.

Optionally, one of the L downlink reference signals associated with the Y PRACH is one of the following:

the downlink reference signal with the largest or smallest index value in the L downlink reference signals;

And the earliest or latest sent PRACH associated downlink reference signal in the Y PRACH.

Optionally, the first downlink reference signal is a first downlink reference signal corresponding to the L downlink reference signals in M first downlink reference signals configured by the network side device, where M is a positive integer.

Optionally, the first carrier is a carrier of a SUL indicated by the network side device or a carrier of a regular uplink NUL in case the network side device is configured with a supplementary uplink SUL.

Optionally, the first serving cell is a serving cell determined based on at least one of the following in a case that the network side device configures K serving cells of carrier aggregation:

the cell identity is the lowest or highest cell;

an activated cell;

a non-dormant cell;

a primary cell;

a primary and secondary cell;

the cell with the lowest or highest frequency;

wherein K is a positive integer.

Optionally, the first reference signal is one of:

a synchronization information block SSB;

channel state information reference signal CSI-RS.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, X physical random access channels PRACH are sent, and a first listening opportunity is obtained; wherein, the first monitoring time is located at the overlapping time of the monitoring windows corresponding to Y PRACH in the X PRACH; determining a first reference signal corresponding to the first listening occasion; and performing first downlink reception at the first monitoring time by using the quasi co-located parameter corresponding to the first reference signal, so that the reference signal corresponding to the quasi co-located parameter for downlink reception is definitely defined at the overlapped part in the RAR window, so that the terminal can simply and definitely determine a receiving beam, and receive the downlink channels which are transmitted by network side equipment in different beams and are related to RAR by using the receiving beam which is more suitable in general.

Based on the above embodiment, optionally, in a case where the first downlink reception and the second downlink reception overlap, the first reference signal is a reference signal corresponding to a quasi co-location parameter used by the second downlink reception; wherein the second downlink reception is a downlink reception for receiving a second downlink channel.

Optionally, when the first downlink reception and the second downlink reception overlap, and the reference signal corresponding to the quasi co-sited parameter used by the second downlink reception is one of the L downlink reference signals associated with the Y PRACH, the first reference signal is the reference signal corresponding to the quasi co-sited parameter used by the second downlink reception; the second downlink reception is a downlink reception for receiving a second downlink channel, and the second downlink channel is other downlink channels except the downlink channel of the first downlink reception.

Based on the above embodiment, optionally, the receiving module 503 is configured to monitor a PDCCH for scheduling RAR using a random access radio network temporary identifier RA-RNTI corresponding to the Y PRACHs.

Optionally, in the case that the terminal receives the first PDCCH, the execution module 502 is further configured to determine a second reference signal corresponding to a quasi co-located parameter used for performing third downlink reception;

the receiving module 503 is further configured to perform the third downlink reception at a second listening occasion according to a quasi co-location parameter of the second reference signal;

wherein the third downlink reception is configured to receive at least one downlink channel of:

a first PDSCH;

a second PDCCH;

a second PDSCH, which is a PDSCH scheduled by the second PDCCH;

the second reference signal is one of:

the first reference signal;

and a downlink reference signal associated with a random reception channel opportunity RO corresponding to the RA-RNTI corresponding to the received first PDCCH.

Optionally, the second listening occasion is a downlink receiving occasion corresponding to one PRACH of the Y PRACHs.

Optionally, the sending module 501 is further configured to send a message 3Msg3 using a quasi co-sited parameter corresponding to a third reference signal according to the first downlink received indication, where the third reference signal is one of the following:

A downlink reference signal associated with a random reception opportunity RO corresponding to an RA-RNTI corresponding to the received first PDCCH;

a downlink reference signal associated with a Preamble indicated by a received first PDSCH;

one of L downlink reference signals associated with the Y PRACH, wherein L is smaller than or equal to a positive integer of Y;

a second downlink reference signal, where the second downlink reference signal is a downlink reference signal determined by the terminal;

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, the Msg3 is sent by using the quasi co-located parameter corresponding to the third reference signal according to the first downlink received indication, so that a correct beam can be used when the Msg3 is sent.

The device for determining the quasi co-location parameter 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 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 device for determining the quasi co-location parameter provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 2 to fig. 4, and achieve the same technical effects, so that repetition is avoided, and no further description is given 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 an instruction that can be executed on the processor 601, for example, when the communication device 600 is a terminal, the program or the instruction is executed by the processor 601 to implement the steps of the above embodiment of the method for determining the quasi co-location parameter, and the same technical effects can be achieved. 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 above embodiment of the method for determining the quasi co-location parameter, 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 processor is used for determining a first reference signal corresponding to the first monitoring time, and the communication interface is used for sending X physical random access channels PRACH and acquiring the first monitoring time; and performing first downlink reception at the first monitoring opportunity by using a quasi co-location parameter corresponding to the first reference signal. 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 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 this embodiment, after receiving downlink data from the 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 non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. 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 present 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 send X physical random access channels PRACH, and obtain a first monitoring opportunity; wherein the first monitoring time is located at the overlapping time of monitoring windows corresponding to Y PRACH in the X PRACH, and X and Y are positive integers greater than 1;

a processor 710 for determining a first reference signal corresponding to the first listening occasion;

a radio frequency unit 701, configured to perform a first downlink reception at the first listening occasion using a quasi co-sited parameter corresponding to the first reference signal.

Optionally, the first reference signal is one of:

the cell identity is the lowest or highest cell;

an activated cell;

a non-dormant cell;

a primary cell;

a primary and secondary cell;

the cell with the lowest or highest frequency;

wherein K is a positive integer.

Optionally, the first reference signal is one of:

a synchronization information block SSB;

channel state information reference signal CSI-RS.

Optionally, in the case that the first downlink reception and the second downlink reception overlap, the first reference signal is a reference signal corresponding to a quasi co-location parameter used by the second downlink reception; wherein the second downlink reception is a downlink reception for receiving a second downlink channel.

Optionally, the radio frequency unit 701 is configured to monitor a PDCCH for scheduling RAR using a random access radio network temporary identifier RA-RNTI corresponding to the Y PRACHs.

Optionally, in the case that the terminal receives the first PDCCH, the processor 710 is further configured to determine a second reference signal corresponding to a quasi co-located parameter used for receiving the third downlink reception;

the radio frequency unit 701 is further configured to perform the third downlink reception at a second listening occasion according to a quasi co-location parameter of the second reference signal;

A first PDSCH;

a second PDCCH;

a second PDSCH, which is a PDSCH scheduled by the second PDCCH;

the second reference signal is one of:

the first reference signal;

Optionally, the radio frequency unit 701 is further configured to send a message 3Msg3 using a quasi co-sited parameter corresponding to a third reference signal according to the first downlink received indication, where the third reference signal is one of:

According to the embodiment of the application, the overlapping part in the RAR window defines the reference signal corresponding to the quasi-co-location parameter for downlink reception, so that the terminal can simply and definitely determine the receiving beam, and the network side equipment receives the downlink channels which are transmitted by different beams and are related to the RAR by using the receiving beam which is more suitable in the whole.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the processes of the above embodiment of the method for determining the quasi co-location parameter are implemented, 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 includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is configured to run a program or an instruction, implement each process of the above embodiment of the method for determining the quasi co-location parameter, and achieve the same technical effect, so that repetition is avoided, and no further description is provided herein.

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 embodiments of the present application further provide 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 embodiment of the method for determining a quasi co-location parameter, and the same technical effects can be achieved, so that repetition is avoided, and details are not repeated here.

The embodiment of the application also provides a system for determining the quasi co-location parameter, which comprises the following steps: the terminal can be used for executing the steps of the method for determining the quasi co-location parameters, and the network side equipment can be used for executing the steps related to the network side equipment in the method for determining the quasi co-location parameters.

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 also 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 solutions 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 (such as ROM/RAM, magnetic disk, optical disk), comprising several 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 described in 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 of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A method for determining quasi co-location parameters, comprising:

2. The method of claim 1, wherein the first downlink reception is for receiving at least one of the following downlink channels:

a first physical downlink control channel PDCCH, the first PDCCH being a PDCCH for scheduling a random access response RAR;

3. The method of claim 1, wherein the first reference signal is one of:

4. The method of claim 3, wherein one of the L downlink reference signals associated with the Y PRACH is one of:

5. The method of claim 3, wherein the first downlink reference signal is a first downlink reference signal corresponding to the L downlink reference signals among M first downlink reference signals configured by the network side device, where M is a positive integer.

6. A method according to claim 3, characterized in that the first carrier is the carrier of a SUL indicated by the network side device or the carrier of a regular uplink NUL in case the network side device is configured with a supplementary uplink SUL.

7. A method according to claim 3, wherein the first serving cell is a serving cell determined based on at least one of the following in case the network side device configures K serving cells for carrier aggregation:

the cell identity is the lowest or highest cell;

an activated cell;

a non-dormant cell;

a primary cell;

a primary and secondary cell;

the cell with the lowest or highest frequency;

wherein K is a positive integer.

8. The method according to claim 1, wherein in case of overlapping of the first downlink reception and the second downlink reception, the first reference signal is a reference signal corresponding to a quasi co-sited parameter used by the second downlink reception; wherein the second downlink reception is a downlink reception for receiving a second downlink channel.

9. The method of claim 1, wherein the first reference signal is a reference signal corresponding to a quasi co-sited parameter used by the second downlink reception if the first downlink reception and the second downlink reception overlap and the reference signal corresponding to the quasi co-sited parameter used by the second downlink reception is one of L downlink reference signals associated with the Y PRACH; the second downlink reception is a downlink reception for receiving a second downlink channel, and the second downlink channel is other downlink channels except the downlink channel of the first downlink reception.

10. The method of claim 1, wherein the terminal performing a first downlink reception at the first listening occasion using a quasi co-sited parameter corresponding to the first reference signal comprises:

and the terminal monitors PDCCH for scheduling RAR by using the random access radio network temporary identifier RA-RNTI corresponding to the Y PRACH.

11. The method of claim 2, wherein in the case that the terminal receives the first PDCCH, the method further comprises:

the terminal determines a second reference signal corresponding to a quasi co-location parameter used for third downlink reception;

the terminal receives the third downlink at a second monitoring time according to the quasi co-location parameter of the second reference signal;

a first PDSCH;

a second PDCCH;

a second PDSCH, which is a PDSCH scheduled by the second PDCCH;

the second reference signal is one of:

the first reference signal;

12. The method of claim 11, wherein the second listening occasion is a downlink reception occasion corresponding to one PRACH of the Y PRACHs.

13. The method of claim 1, wherein after the terminal performs a first downlink reception at the first listening occasion using a quasi co-sited parameter corresponding to the first reference signal, the method further comprises:

the terminal sends a message 3Msg3 by using a quasi co-location parameter corresponding to a third reference signal according to the first downlink receiving instruction, wherein the third reference signal is one of the following:

14. The method of claim 1, wherein the first reference signal is one of:

a synchronization information block SSB;

channel state information reference signal CSI-RS.

15. A quasi co-located parameter determining apparatus, comprising:

16. 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 method of determining a quasi co-sited parameter according to any one of claims 1 to 14.

17. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the method of determining quasi co-sited parameters according to any one of claims 1-14.