CN116782414A

CN116782414A - Random access method and device thereof

Info

Publication number: CN116782414A
Application number: CN202210243902.2A
Authority: CN
Inventors: 周欢; 徐志昆; 王化磊; 雷珍珠
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2023-09-19

Abstract

The application discloses a random access method and a device thereof, which are applied to the technical field of communication. The method comprises the following steps: receiving a plurality of synchronous signal blocks SSB or a plurality of channel state information reference signals CSI-RS from network equipment, and respectively transmitting a preamble to the network equipment through a plurality of random access occasions RO; monitoring a Physical Downlink Control Channel (PDCCH) at a monitoring position of a random access search space in a Random Access Response (RAR) time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries an RAR for the preamble. In this way, the success rate of random access is advantageously improved.

Description

Random access method and device thereof

Technical Field

The present application relates to the field of communications technologies, and in particular, to a random access method and a device thereof.

Background

The terminal device initiates a random access request through a PRACH (Physical Random Access Channel ). If the RAR from the network device is not received before the RAR (Random Access Response ) time window ends, or the random access request is not successfully detected by the network device due to too small transmission power of the random access request, or other reasons, the random access is considered to fail, and the terminal device needs to send the random access request again for random access, which affects the performance of the terminal device.

If the terminal device sends the random access request at least twice through different beams before the RAR time window is finished, the probability of the network device successfully receiving the random access request can be improved. However, in the case that the terminal device transmits the random access request at least twice, the terminal device cannot determine QCL attribute (quasi co-location properties, quasi co-sited attribute) of a PDCCH (Physical Downlink Control Channel ) DMRS (Demodulation Reference Signal, demodulation reference signal) port scheduling a PDSCH (Physical Downlink Shared Channel ) on which the random access response is carried, so that the terminal device may not receive the random access response, resulting in random access failure.

Disclosure of Invention

The application discloses a random access method and a device thereof, wherein under the condition that preambles are respectively sent to network equipment through a plurality of RO, QCL attributes of PDCCH DMRS ports at monitoring positions of a random access search space in an RAR time window are determined according to a first SSB or a first CSI-RS, so that the success rate of random access is improved.

In a first aspect, an embodiment of the present application provides a random access method, where the method includes: receiving a plurality of synchronization signal blocks SSB or a plurality of channel state information reference signals CSI-RS from a network device; respectively sending a preamble to the network equipment through a plurality of random access occasions RO; monitoring a Physical Downlink Control Channel (PDCCH) at a monitoring position of a random access search space in a Random Access Response (RAR) time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries a RAR for the preamble.

In an alternative embodiment, pdcchdms ports at different listening positions in the random access search space have different QCL attributes.

In an alternative embodiment, the first SSB includes the above-mentioned plurality of SSBs, or the first CSI-RS includes the above-mentioned plurality of CSI-RS.

In an alternative embodiment, the first SSB includes SSBs associated with the preamble of the SSBs, or the first CSI-RS includes CSI-RS associated with the preamble of the CSI-RS.

In an alternative embodiment, the number of first SSBs is a plurality, or the number of first CSI-RSs is a plurality; monitoring positions of time domain index ascending sequences sequentially correspond to first SSB of SSB index ascending sequences or first CSI-RS of CSI-RS index ascending sequences, one or more monitoring positions correspond to one first SSB, and one or more monitoring positions correspond to one first CSI-RS; for the ith listening position of the random access search space, the QCL attribute of the PDCCH DMRS port on the ith listening position is the QCL attribute of the first SSB or the first CSI-RS corresponding to the ith listening position.

In an alternative embodiment, the QCL attribute of the PDCCH DMRS port at the listening position of the time-domain index ascending order loops around the first SSB corresponding to the SSB index ascending order or loops around the first CSI-RS corresponding to the CSI-RS index ascending order.

In an alternative embodiment, the foregoing plurality of listening positions corresponds to a first SSB including: a plurality of monitoring positions with continuous time domain indexes correspond to a first SSB; or, the plurality of listening positions corresponds to one first CSI-RS, including: the plurality of listening positions with consecutive time domain indexes correspond to one first CSI-RS.

In an alternative embodiment, the plurality of listening positions corresponds to a first SSB including: the K listening positions correspond to one first SSB, or the plurality of listening positions correspond to one first CSI-RS, including: the K monitoring positions correspond to a first CSI-RS; k is a positive integer smaller than N, and N is the number of preamble times sent to the network device through the plurality of RO.

In an alternative embodiment, K is the minimum of the first number and the second number; wherein the first number is the number of SSBs associated with the plurality of ROs among the plurality of SSBs, or the first number is the number of CSI-RS associated with the plurality of ROs among the plurality of CSI-RS; the second number is a number of QCL attributes of the network configuration, the second number being determined based on the first configuration information from the network device.

In an alternative embodiment, the first SSB includes: and SSB associated with the preamble indicated by the preset index in the preambles respectively sent to the network equipment by the plurality of RO.

In an alternative embodiment, the method further comprises: receiving second configuration information from the network equipment, wherein the second configuration information carries a parameter W; determining the length of the RAR time window as W.times.N according to the second configuration information; n is the number of preamble transmitted to the network device through the ROs, respectively.

In a second aspect, an embodiment of the present application provides another random access method, where the method includes: transmitting a plurality of synchronization signal blocks SSB or a plurality of channel state information reference signals CSI-RS to a terminal device; receiving a preamble from a terminal device, wherein the preamble is sent to a network device by the terminal device through a plurality of random access occasions RO; transmitting a Physical Downlink Control Channel (PDCCH) to the terminal equipment; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a physical downlink shared channel PDSCH, where the PDSCH carries a random access response RAR for the preamble.

In an alternative embodiment, the first SSB includes: and the terminal equipment respectively sends the preamble which is related to the preamble indicated by the preset index to the network equipment through the plurality of RO.

In an alternative embodiment, the method further comprises: sending second configuration information to the terminal equipment; the second configuration information carries a parameter W, and is used for configuring the length of the RAR time window to be W x N; n is the number of preamble sent to the network device by the terminal device through the plurality of RO respectively, and the terminal device monitors the PDCCH in the RAR time window.

In a third aspect, an embodiment of the present application provides a random access device, where the device includes means for implementing the method in the first or second aspect.

In a fourth aspect, an embodiment of the present application provides another random access apparatus, including a processor; the processor is configured to perform the method of the first aspect or the second aspect.

In an alternative embodiment, the random access device may further comprise a memory; the memory is used for storing a computer program; a processor, in particular for invoking a computer program from the memory, for performing the method according to the first or second aspect.

In a fifth aspect, an embodiment of the present application provides a chip for performing the method of the first or second aspect.

In a sixth aspect, an embodiment of the present application provides a chip module, including a communication interface and a chip, wherein: the communication interface is used for carrying out internal communication of the chip module or carrying out communication between the chip module and external equipment; the chip is for performing the method of the first or second aspect.

In a seventh aspect, embodiments of the present application provide a computer readable storage medium storing a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of the first or second aspect.

In an eighth aspect, embodiments of the present application provide a computer program product comprising a computer program or instructions which, when run on a computer, cause the computer to perform the method according to the first or second aspect.

According to the embodiment of the application, the network equipment sends a plurality of SSB or a plurality of CSI-RS to the terminal equipment, the terminal equipment respectively sends the preamble to the network equipment through a plurality of RO, after the network equipment receives the preamble, the QCL attribute of a PDCCH DMRS port can be determined through the first SSB in the SSB or the first CSI-RS in the CSI-RS, and the PDCCH is sent to the terminal equipment through the determined QCL attribute. Accordingly, after the terminal device sends the preamble, the terminal device may determine the QCL attribute of the PDCCH DMRS port according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, that is, the terminal device monitors the PDCCH through the determined QCL attribute, which helps to improve the possibility that the terminal device successfully monitors the PDCCH, and further, the terminal device may receive the PDSCH according to the indication of the PDCCH DCI and parse the PDSCH payload (payload) to obtain the RAR message, thereby being beneficial to improving the success rate of random access.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a four-step random access according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a two-step random access according to an embodiment of the present application;

fig. 4 is a schematic flow chart of a random access method according to an embodiment of the present application;

fig. 5 is a schematic diagram of a terminal device monitoring PDCCH according to an embodiment of the present application;

fig. 6 is a schematic diagram of another terminal device according to an embodiment of the present application listening to PDCCH;

fig. 7 is a schematic diagram of a terminal device monitoring PDCCH according to another embodiment of the present application;

fig. 8 is a schematic diagram of a terminal device monitoring PDCCH according to another embodiment of the present application;

fig. 9 is a schematic diagram of a terminal device monitoring PDCCH according to another embodiment of the present application;

fig. 10 is a schematic diagram of a terminal device monitoring PDCCH according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a random access device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another random access device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of yet another random access device according to an embodiment of the present application;

Fig. 14 is a schematic structural diagram of a chip module according to an embodiment of the present application.

Detailed Description

It should be understood that the terms "first," "second," and the like, as used in embodiments of the present application, are used for distinguishing between different objects and not for describing a particular sequential order. The term "at least one" in the embodiments of the present application means one or more, and the term "a plurality" means two or more. In the embodiment of the application, "and/or" describes the association relation of the association objects, which indicates that three relations can exist, for example, a and/or B can indicate the following three cases: a is present alone, while A and B are present together, and B is present alone. Wherein A, B can be singular or plural. The character "/" may indicate that the context-dependent object is an "or" relationship. In addition, the symbol "/" may also denote a divisor, i.e. performing a division operation.

"at least one of the following" or its similar expressions in the embodiments of the present application means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b and c. Wherein each of a, b, c may be an element or a set comprising one or more elements.

In the embodiments of the present application, "of", "corresponding", "associated", "mapped" may be used in a mixed manner. It should be noted that the concepts or meanings to be expressed are consistent when de-emphasizing the distinction.

Referring to fig. 1, fig. 1 is a schematic diagram of a communication system according to an embodiment of the application. The communication system may include, but is not limited to, a terminal device and a network device, and the number and form of devices shown in fig. 1 are not limited to the embodiments of the present application, and may include two or more network devices and two or more terminal devices in practical applications. The communication system shown in fig. 1 is exemplified as including one terminal device 101 and one network device 102.

In this embodiment of the present application, the terminal device is a device with a wireless transceiver function, and may be referred to as a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal device, a vehicle-mounted terminal device, an industrial control terminal device, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus. The terminal device may be fixed or mobile. It should be noted that the terminal device may support at least one wireless communication technology, such as long term evolution (long time evolution, LTE), new Radio (NR), wideband code division multiple access (wideband code division multiple access, WCDMA), and so on. For example, the terminal device may be a mobile phone, a tablet, a desktop, a notebook, a kiosk, a car-mounted terminal, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in a self-driving, a wireless terminal in a teleoperation (remote medical surgery), a wireless terminal in a smart grid, a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city, a wireless terminal in a smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network, or a public land mobile network (public landmobile network) or the like. In some embodiments of the present application, the terminal device may also be a device with a transceiver function, such as a chip module. The chip module may include a chip and may further include other discrete devices. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

In the embodiment of the present application, the network device is a device that provides a wireless communication function for the terminal device, where the network device may be AN Access Network (AN) device, and the AN device may be a radio access network (radio access network, RAN) device. Wherein the access network device may support at least one wireless communication technology, such as LTE, NR, WCDMA, etc. By way of example, access network devices include, but are not limited to: a next generation base station (gNB), evolved node B (eNB), radio network controller (radio network controller, RNC), node B (NB), base station controller (base station controller, BSC), base transceiver station (basetransceiver station, BTS), home base station (e.g., home evolved node B, or home node B, HNB), baseband unit (BBU), TRP, transmission point (transmitting point, TP), mobile switching center, etc. in the fifth generation mobile communication system (5 th-generation, 5G). The network device may also be a wireless controller, a Centralized Unit (CU) and/or a Distributed Unit (DU) in the cloud wireless access network (cloud radio access network, CRAN) scenario, or the access network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and an access network device in future mobile communication or an access network device in a future evolved PLMN, etc. In some embodiments, the network device may also be a device, such as a chip module, with the functionality to provide wireless communication for the terminal device. By way of example, the chip module may include a chip, and may include other discrete devices. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the network equipment.

It should be noted that the technical solution of the embodiment of the present application may be applied to various communication systems. For example: LTE communication system, 4th generation (4th generation,4G) mobile communication system, 5G NR system. Optionally, the method according to the embodiment of the present application is also applicable to various future communication systems, such as a 6G system or other communication networks.

It may be understood that, the communication system described in the embodiment of the present application is for more clearly describing the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided by the embodiment of the present application, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of a new service scenario, the technical solution provided by the embodiment of the present application is equally applicable to similar technical problems.

First, technical terms related to the embodiments of the present application will be described so as to be easily understood by those skilled in the art.

(1) Random access procedure

The random access procedure may enable the terminal device to access the network, establishing a connection with the network. The random access process can be divided into a four-step random access process and a two-step random access process according to the communication times of the random access process. The four-step random access procedure may include four messages, msg1, msg2, msg3, and Msg 4. As shown in fig. 2, a flow chart of a four-step random access procedure is shown.

First, the terminal device transmits a random access request to the network device through a physical random access channel (Physical Random Access Channel, PRACH). Wherein the random access request may also be referred to as message 1 (Msg 1). Specifically, the random access request may include a random access preamble (random access preamble, RA preamble). The primary function of the rapamble is to inform the network device of a random access request, and enable the network device to estimate a transmission delay with the terminal device.

Next, the network device receives the random access request and transmits a random access response (Random Access Response, RAR) to the terminal device. Wherein RAR may also be referred to as message 2 (Msg 2).

In some embodiments, the network device sends the RAR to the terminal device on PDSCH (Physical Downlink Shared Channel ) payload (payload) resources. Illustratively, in an embodiment of the present application, the RAR is obtained by scrambling the RA-RNTI (random access radio network temporary identifier, random access radio network temporary identity). In some embodiments, the value of the RA-RNTI is determined by the time-frequency resource location of the resource carrying the RA preamble.

For the terminal device, after the terminal device transmits the RA preamble, the terminal device listens to the PDCCH (Physical Downlink Control Channel ) scrambled by the RA-RNTI within the RAR time window (window) to receive the RAR corresponding to the RA-RNTI. If the RAR is not received in the RAR time window, the random access process is considered to be failed. If the terminal device successfully uses the RA-RNTI to parse the PDCCH to obtain the downlink control information (Downlink Control Information, DCI), the terminal device then attempts to parse the PDSCH payload using the RA-RNTI according to the DCI. Each random access request corresponds to an RA preamble ID (or RA preamble index), and if the terminal device successfully decodes PDSCH payload, it checks whether the RA preamble sequence number (Random access preamble identity, RAPID) is the same as the RA preamble ID used when Msg1 is transmitted. If the same is true, then Msg2 demodulation is successful, at which point the terminal device may stop listening to the RAR.

Then, the terminal device receives the RAR and sends a message 3 to the network device. Wherein message 3, msg3. For example, the terminal device sends Msg3 to the network device on PUSCH (Physical Uplink Share Channel, physical uplink shared channel). Further, in some embodiments, the Msg3 contains a terminal device unique tag. This flag may be used for conflict resolution. For example, for a terminal device in rrc_connected (Radio Resource Control _connected) state, the terminal device unique flag is a C-RNTI (Cell Radio Network Temporary Identifier, radio network temporary identity); for another example, for a terminal device in the non-rrc_connected state, the terminal device unique identifier is a unique terminal device identifier (e.g. S-TMSI (SAE Temporary Mobile Station Identifier, S temporary mobile subscriber identity) or a random number) from the core network.

Finally, the network device receives the Msg3 and sends a message 4 to the terminal device. Wherein message 4 may also be referred to as Msg4.

Specifically, the network device carries the flag for uniquely identifying the terminal device in Msg4 in the collision resolution mechanism to indicate the winning terminal device, and other terminal devices that are not winning in the collision resolution will re-initiate random access. If the PDSCH received by the terminal device in Msg4 is scrambled by TC-RNTI (Temporary Cell Radio Network Temporary Identifier, temporary cell radio network temporary identity) specified in the RAR message, the terminal device considers that random access is successful and converts its own TC-RNTI into C-RNTI when a UE CRID (Contention Resolution Identity ) MAC CE (control element) contained in the successfully decoded MAC (Medium Access Control ) PDU (Protocol Data Unit, protocol data unit) matches with a CCCH (Common Control Channel ) SDU (service Data Unit, service data unit) transmitted by Msg 3.

The two-step random access procedure may include two messages, message a (also called MsgA) and message B (also called MsgB), and the flow diagram of the two-step random access procedure is shown in fig. 3.

Wherein, msgA includes Msg1 and Msg3, that is, includes a preamble transmitted on PRACH and a payload (payload) transmitted on PUSCH. Msg B includes Msg2 and Msg4. If the network equipment only receives the preamble sent by the terminal equipment, the RAR of the four-step random access process is replied, and the terminal equipment is retracted to the four-step random access process.

(2) Random access preamble (RA preamble)

The RA preamble is used to request access to the network and inform the network device that there is a random access request. The RA preamble may be used for distinguishing the terminal device initiating the random access by the network device during the random access, and may also be used for other purposes, which is not limited in the embodiment of the present application. In the embodiment of the present application, the RA preamble may also be described as a preamble, and both have the same meaning and may be used instead of each other.

For example, a cell has 64 available RA preambles, which constitute a RA preamble sequence, and each RA preamble has a unique index (RA preamble index) in the RA preamble sequence. Wherein the terminal device may select one (or designate one by the network device) RA preamble from the RA preamble sequence to transmit using a Physical Random Access Channel (PRACH) opportunity (RO), i.e., the RA preamble is carried by the PRACH opportunity.

Fig. 4 is a schematic flow chart of a random access method according to an embodiment of the present application. As shown in fig. 4, the random access method may include, but is not limited to, the following steps:

s401, the network device sends a plurality of synchronous signal blocks SSB or a plurality of channel state information reference signals CSI-RS to the terminal device. Correspondingly, the terminal device receives a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS from the network device.

Wherein the SSBs (Synchronization signal block, synchronization signal blocks) may be SSBs of cells, which include cells served by the network device. The SSB of the cell may be an SSB configured by higher layer signaling, e.g., an SSB configured by SSB-location inburst in SIB1, or an SSB configured by ServingCellConfigCommon. Illustratively, the terminal device receives a SIB1 message from the network device, and obtains the plurality of SSBs from the SIB1 message. It may be appreciated that the plurality of CSI-RS (channel state information-reference signals) may include: CSI-RS transmitted by the cell. The CSI-RS may be configured by csirs-resource list.

In the embodiment of the present application, the plurality of SSBs may include all SSBs or part SSBs of the cell. For example, a cell is configured with 4 SSBs, where the 4 SSBs are SSB0, SSB1, SSB2, and SSB3, respectively, and the cell may send SSB0, SSB1, SSB2, and SSB3 to a terminal device, where the plurality of SSBs includes all SSBs of the cell. Alternatively, the cell transmits SSB0, SSB1, SSB2 to the terminal device, and the plurality of SSBs include a part SSB of the cell. 3 SSBs in SB.

S402, the terminal equipment respectively sends preamble preambles to the network equipment through a plurality of RO. Accordingly, the network device receives preambles from the terminal device on the ROs, respectively.

The terminal device sending the preamble to the network device through the ROs respectively includes: the terminal device sends random access requests to the network device through a plurality of ROs respectively, wherein a random access case includes a preamble. The terminal device may send a random access request on an RO. The terminal device sends preamble representations through a plurality of ROs respectively: the terminal device sends a random access request on each of the ROs, and each random access request includes a preamble. For example, taking the above-mentioned RO as RO1 and RO2, respectively, the terminal device sends the preamble to the network device through RO1 and RO2, respectively, it can be understood that: the terminal device transmits a preamble to the network device on RO1 and transmits a preamble to the network device on RO 2. It should be noted that the random access request may include a preamble, or an ID (identifier) or index of the preamble.

Alternatively, the number of preambles available on each RO is 64. In the embodiment of the present application, preambles respectively sent by the terminal device through the ROs may be the same or different. For example, taking the example that the ROs are RO1 and RO2, respectively, the terminal device transmits preamble1 on RO1 and transmits preamble1 on RO2, in which case the preambles transmitted by the terminal device through the ROs are the same. Alternatively, the terminal device transmits preamble1 on RO1 and transmits preamble2 on RO2, in which case the preambles transmitted by the terminal device through the ROs are different, respectively.

Optionally, the plurality of ROs may include: some or all of the ROs associated with the SSBs described above. For example, taking SSB0, SSB1, and SSB2 as examples, the plurality of SSBs sent from the network device to the terminal device are respectively SSB0, SSB1, and SSB2 are respectively RO1, RO2, and RO3. The terminal device may transmit the preamble to the network device through RO1, RO2, and RO3, respectively, in which case the plurality of ROs include all ROs among ROs associated with the plurality of SSBs. Alternatively, the terminal device may send the preamble to the network device through RO1 and RO2, respectively, or the terminal device may send the preamble to the network device through RO2 and RO3, respectively, where the plurality of ROs include a part of ROs in ROs associated with the plurality of SSBs. Optionally, the plurality of ROs may include: some or all of ROs associated with the above-described CSI-RS. For example, taking CSI-RS0, CSI-RS1 and CSI-RS2 as examples, where CSI-RS0 is associated with RO1, CSI-RS1 is associated with RO2, and CSI-RS2 is associated with RO3. The terminal device may transmit preambles to the network device through RO1, RO2, and RO3, respectively, in which case the plurality of ROs include all ROs among ROs associated with the plurality of CSI-RSs. Alternatively, the terminal device may send the preamble to the network device through RO1 and RO2, respectively, in which case the plurality of ROs include part of ROs associated with the plurality of CSI-RSs.

In an embodiment of the present application, the plurality of ROs may be associated with a plurality of SSBs, and the plurality of SSBs may be associated with one or more beams. The terminal device may send the preamble to the network device through the plurality of ROs respectively. Different SSBs may be associated with the same beam or different beams. Illustratively, the plurality of ROs are RO1, RO2, and RO3, respectively. In this case, the terminal device sends preambles through RO1, RO2, RO3, respectively, RO1 being associated with SSB1, RO2 being associated with SSB2, RO3 being associated with SSB3, wherein SSB1 and SSB3 are both associated with beam 1, SSB3 being associated with beam 2. Alternatively, SSB1, SSB2, SSB3 are all different associated beams. For example, SSB1 associated beam 1, SSB2 associated beam 2, SSB3 associated beam 3.

S403, monitoring PDCCH at a monitoring position of the random access search space in the RAR time window by the terminal equipment; the QCL attribute of the PDCCH DMRS port at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a PDSCH, where the PDSCH carries an RAR for the preamble.

In the embodiment of the application, a network device sends a plurality of SSBs or a plurality of CSI-RSs to a terminal device, the terminal device sends a preamble to the network device through a plurality of ROs respectively, after the network device receives the preamble, the network device can determine a QCL attribute (quasi co-location properties) of a PDCCH DMRS port through a first SSB of the SSBs or a first CSI-RS of the CSI-RSs, and further send a PDCCH to the terminal device through the determined QCL attribute. Accordingly, after the terminal device sends the preamble, the QCL attribute (quasi co-location properties, quasi co-location attribute) of the PDCCH DMRS port may be determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, that is, the terminal device monitors the PDCCH through the determined QCL attribute, which helps to improve the probability that the terminal device successfully monitors the PDCCH, and further, the terminal device may receive the PDSCH according to the indication of the PDCCH DCI and parse the PDSCH payload (payload) to obtain the RAR message, thereby being beneficial to improving the success rate of random access.

It should be noted that, the network device may receive all preambles or part of preambles from the terminal device through the plurality of ROs, and further, the network device may send the PDCCH and the DMRS to the terminal device through the QCL attribute of one SSB of the plurality of SSBs sent to the terminal device or one CSI-RS of the plurality of CSI-RS sent to the terminal device. For example, taking SSB0 and SSB1 as SSBs received by the terminal device from the network device, the terminal device sends preamble1 on RO1 and preamble2 on RO 2. Wherein RO1 is associated with SSB0 and RO2 is associated with SSB1. If the network device receives only preamble1, the network device may send PDCCH and DMRS to the terminal device through QCL attribute of SSB 0. The terminal device may not know that the network device has not received preamble2, and the terminal device may monitor the PDCCH through the QCL attribute of SSB0 at one part of the monitoring locations (e.g., the first two monitoring locations), and monitor the PDCCH through the QCL attribute of SSB1 at the other part of the monitoring locations (e.g., the second two monitoring locations). That is, the QCL attribute of the PDCCH DMRS port in the first two listening positions is the QCL attribute of SSB0, and the QCL attribute of the PDCCH DMRS port in the last two listening positions is the QCL attribute of SSB1. From the foregoing, it can be seen that the network device actually transmits the PDCCH and DMRS to the terminal device through the QCL attribute of SSB0, and therefore, the QCL attribute of the PDCCH DMRS port is actually the QCL attribute of SSB1. It will be appreciated that the terminal device assumes that the QCL attribute of the PDCCH DMRS port at the first two listening positions is the QCL attribute of SSB0 and that the QCL attribute of the PDCCH DMRS port at the last two listening positions is the QCL attribute of SSB1, rather than indicating that the terminal device actually knows the QCL attribute of the PDCCH DMRS port. I.e., the UE may assume the DM-RS antenna port quasi co-location properties.

The listening position can also be understood as a listening opportunity, which can be configured by higher layer signaling. Illustratively, higher layer signaling configures which locations within a slot (slot) to listen to the PDCCH.

Alternatively, the random access search space within the RAR time window may include 1 or more listening positions. In an embodiment of the present application, the random access search space may refer to CSS (common search space). The format of the PDCCH monitored by the terminal device may be format 1 (Type 1), that is, the monitoring position of the random access search space in the RAR time window of the terminal device, and monitors the Type 1PDCCH.

In a first implementation, the first SSB includes: and the terminal equipment receives a plurality of SSBs from the network equipment. The plurality of SSBs may be SSBs of cells including cells served by the network device. Alternatively, the first SSB includes: the terminal device receives a part of SSBs from the network device. Illustratively, the first SSB includes: and SSB associated with the preamble in the plurality of SSBs received from the network device. It may be appreciated that the first CSI-RS may comprise: and the terminal equipment receives the plurality of CSI-RSs from the network equipment. The plurality of CSI-RS may be CSI-RS transmitted by a cell. Alternatively, the first CSI-RS may include: and the terminal equipment receives partial CSI-RS in the plurality of CSI-RSs from the network equipment.

In a second implementation, the first SSB includes: and SSBs associated with the preamble (i.e., the preamble transmitted to the network device through the ROs, respectively) among the SSBs. In the embodiment of the present application, the preambles sent to the network device by the ROs may be associated with the same SSB or may be associated with different SSBs. For example, taking the above-mentioned ROs as RO1, RO2, and RO3, respectively, and the terminal device transmits preamble1 through RO1, preamble2 through RO2, and preamble3 through RO3 as an example. Wherein, preamble1 and preamble2 are both associated with SSB1, and preamble3 is associated with SSB 2. Alternatively, SSBs associated with preamble1, preamble2, and preamble3 are different.

Alternatively, SSBs associated with the preamble (i.e., the preamble transmitted to the network device through the ROs, respectively) may include all SSBs of the SSBs. For example, taking the example that the ROs are RO1 and RO2, respectively, and the terminal device transmits preamble1 through RO1 and preamble2 through RO2, and the SSBs include SSB1 and SSB 2. Wherein preamble1 is associated with SSB1, and preamble2 is associated with SSB 2. At this time, all SSBs (i.e., SSB1 and SSB 2) of the plurality of SSBs are SSBs associated with the preamble.

Alternatively, the SSBs associated with the preamble (i.e., the preamble transmitted to the network device through the ROs, respectively) may include a portion of SSBs among the SSBs, i.e., another portion of SSBs among the SSBs is not associated with the preamble. For example, taking the example that the ROs are RO1 and RO2, respectively, and the terminal device transmits preamble1 through RO1 and preamble2 through RO2, and the SSBs include SSB1 and SSB 2. Wherein, preamble1, preamble2 are associated with SSB 1. At this time, some SSBs (i.e., SSB 1) among the SSBs are SSBs associated with the preamble.

It may be appreciated that, with the first CSI-RS described above, it may include: among the plurality of CSI-RS, a CSI-RS associated with the preamble (i.e., a preamble transmitted to a network device through the plurality of ROs, respectively). In the embodiment of the present application, the preambles sent to the network device by the ROs may be associated with the same CSI-RS or associated with different CSI-RS. For example, taking the above-mentioned ROs as RO1, RO2, and RO3, respectively, and the terminal device transmits preamble1 through RO1, preamble2 through RO2, and preamble3 through RO3 as an example. Wherein, preamble1 and preamble2 are both associated with CSI-RS1, and preamble3 is associated with CSI-RS 2. Alternatively, the CSI-RS associated with each of preamble1, preamble2, and preamble3 are different. Alternatively, the CSI-RS associated with the preamble (i.e., the preamble transmitted to the network device through the ROs respectively) may include all CSI-RS of the CSI-RS. For example, taking the above-mentioned ROs as RO1 and RO2, respectively, and the terminal device transmits preamble1 through RO1 and preamble2 through RO2, and the above-mentioned CSI-RSs include CSI-RS1 and CSI-RS2 as an example. Wherein preamble1 is associated with CSI-RS1, and preamble2 is associated with CSI-RS 2. At this time, all CSI-RS (i.e., CSI-RS1 and CSI-RS 2) among the plurality of CSI-RS are CSI-RS associated with the preamble. Alternatively, the CSI-RS associated with the preamble (i.e., the preamble transmitted to the network device through the ROs respectively) may include a partial CSI-RS among the CSI-RS. For example, taking the above-mentioned ROs as RO1 and RO2, respectively, and the terminal device transmits preamble1 through RO1 and preamble2 through RO2, and the above-mentioned CSI-RSs include CSI-RS1 and CSI-RS2 as an example. Wherein, preamble1, preamble2 are associated with CSI-RS 1. At this time, a partial CSI-RS (i.e., CSI-RS 1) among the plurality of CSI-RS is a CSI-RS associated with the preamble, and another partial CSI-RS (i.e., CSI-RS 2) is not a CSI-RS associated with the preamble.

In a third implementation manner, the first SSB includes: and SSB associated with the preamble indicated by the preset index in the preamble (the preamble sent to the network device by the plurality of RO respectively). The preamble indicated by the preset index is an nth preamble in the preambles, where N is 1 and N is equal to or less than N, N is an index (index) of the preamble, and N is a number of times of the preamble being sent to the network device through the ROs respectively. For example, the above ROs are RO1 and RO2, respectively, and the terminal device transmits preamble1 through RO1 and preamble2 through RO 2. Wherein preamble1 is associated with SSB1, and preamble2 is associated with SSB 2. In this case, if n=1, then the first SSB is: SSB (i.e., SSB 1) associated with the 1 st preamble (i.e., preamble 1) of preamble1 and preamble 2. It should be noted that, SSBs associated with the preamble indicated by the preset index are included in the SSBs received by the terminal device from the network device.

It may be appreciated that the first CSI-RS may include: among the preambles (preambles transmitted to the network device through the ROs, respectively), CSI-RS associated with a preamble indicated by a preset index. The preamble indicated by the preset index is an nth preamble of the preambles. For example, the above ROs are RO1 and RO2, respectively, and the terminal device transmits preamble1 through RO1 and preamble2 through RO 2. Wherein preamble1 is associated with CSI-RS1, and preamble2 is associated with CSI-RS 2. In this case, if n=2, then the first CSI-RS is: CSI-RS (i.e., CSI-RS 2) associated with the 2 nd preamble (i.e., preamble 2) of preamble1 and preamble 2. It should be noted that, the CSI-RS associated with the preamble indicated by the preset index is included in the multiple CSI-RS received by the terminal device from the network device.

Alternatively, the preset index may be preset by a protocol, or the preset index may be determined by the network device and indicated by the network device to the terminal device to preset the index, and illustratively, the network device sends first indication information to the terminal device, where the first indication information is used to indicate the preset index. Correspondingly, the terminal equipment receives the first indication information. Alternatively, the preset index may be determined by the terminal device and the network device is instructed by the terminal device to preset the index. The terminal device sends second indication information to the network device, where the second indication information is used to indicate the preset index. Correspondingly, the network device receives the second indication information from the terminal device.

The QCL attribute of the PDCCH DMRS port at the listening position of the random access search space is determined according to the first SSB or the first CSI-RS, and in the three manners, the first SSB (or the first CSI-RS) determined by the terminal device can be made to include the first SSB (or the first CSI-RS) determined by the network device, so that the QCL attribute of the PDCCH DMRS port determined by the terminal device includes the QCL attribute of the PDCCH DMRS port determined by the network device. For a network device, the network device transmits the PDCCH and the DMRS through the determined QCL attribute. For the terminal device, the terminal device uses the determined QCL attribute to monitor PDCCH DMRS at the monitoring position of the random access search space, further, the terminal device receives the PDCCH, and receives the PDSCH according to the DCI, so as to parse the PDSCH to obtain the RAR message. Therefore, the success rate of random access is improved by the 3 modes. The PDCCH and the DMRS are transmitted together, and therefore, the PDCCH may be monitored according to the QCL attribute of the PDCCH DMRS port.

Alternatively, the number of the first SSBs may be plural, or the number of the first CSI-RS may be plural. In other words, in the RAR time window, the PDCCH is listened to according to QCL attributes of the plurality of first SSBs (or the plurality of first CSI-RSs). Alternatively, the SSB indexes of the SSBs received from the network device may be continuous or discontinuous. It is understood that SSB indexes of the first SSBs may be continuous or discontinuous. Illustratively, the plurality of first SSBs include SSB1, SSB2, and SSB3 (the arabic numerals after SSBs indicate SSB indexes thereof). In this case, SSB indexes of the plurality of first SSBs are consecutive. Alternatively, the SSB indexes of the plurality of first SSBs are discontinuous, taking the case where the plurality of first SSBs includes SSB1, SSB3, and SSB4 as an example. Alternatively, the CSI-RS indexes of the plurality of CSI-RS received from the network device may be continuous or discontinuous. It is to be appreciated that the CSI-RS indexes of the plurality of first CSI-RS may be continuous or discontinuous.

Optionally, the listening positions of the ascending time domain indexes sequentially correspond to the first SSB of the ascending SSB indexes or sequentially correspond to the first CSI-RS of the ascending CSI-RS indexes. For example, the RAR time window includes 3 listening positions, and the time domain indexes of the 3 listening positions are respectively arranged in ascending order: 1. 2, 3, and the plurality of first SSBs are SSB1, SSB2, SSB3, respectively (the arabic numerals after SSB indicate SSB indexes thereof). The listening positions of the time domain index ascending sequence sequentially correspond to the first SSB representation of the SSB index ascending sequence: the 1 st listening position corresponds to SSB1, the 2 nd listening position corresponds to SSB2, and the 3 rd listening position corresponds to SSB3. Taking SSB1, SSB5, and SSB3 (the arabic numerals after SSB indicate SSB indexes thereof) as an example, the listening positions in the time domain index ascending order sequentially correspond to the first SSB indications in the SSB index ascending order: the 1 st listening position corresponds to SSB1, the 2 nd listening position corresponds to SSB3, and the 3 rd listening position corresponds to SSB5.

Alternatively, one or more listening positions may correspond to one first SSB, and one or more listening positions may correspond to one first CSI-RS. For example, the RAR time window includes 4 listening positions, and the time domain indexes of the 4 listening positions are respectively arranged in ascending order: 1. 2, 3, and 4, and the plurality of first SSBs are SSB1 and SSB2, respectively (the arabic numerals after SSBs indicate SSB indexes thereof), respectively. Wherein, the 1 st interception position corresponds to SSB1, the 2 nd interception position corresponds to SSB2, the 3 rd interception position corresponds to SSB1, the 4 th interception position corresponds to SSB2, i.e. the 1 st interception position and the 3 rd interception position both correspond to SSB1, and the 2 nd interception position and the 4 th interception position both correspond to SSB2. Alternatively, the 1 st listening position and the 2 nd listening position correspond to SSB1, and the 3 rd listening position and the 4 th listening position correspond to SSB2.

In one implementation, the manner of determining the QCL attribute of the PDCCH DMRS port at the listening position of the random access search space according to the first SSB or the first CSI-RS is as follows: for the ith listening position of the random access search space, the QCL attribute of the PDCCH DMRS port at the ith listening position is: QCL attribute of the first SSB corresponding to the i-th listening position, or QCL attribute of the first CSI-RS corresponding to the i-th listening position. For example, taking the example that the RAR time window includes 3 listening positions, and the first SSB corresponding to the 1 st listening position is SSB1, the first SSB corresponding to the 2 nd listening position is SSB2, and the first SSB corresponding to the 3 rd listening position is SSB 3. in the case of i=1, the QCL attribute of the PDCCH DMRS port at the 1 st listening position is the QCL attribute of SSB 1. If the first CSI-RS corresponding to the 1 st listening position is CSI-RS1, the first CSI-RS corresponding to the 2 nd listening position is CSI-RS2, and the first CSI-RS corresponding to the 3 rd listening position is CSI-RS3 (the arabic numerals after the CSI-RS indicate their CSI-RS indexes). in the case of i=1, the QCL attribute of the PDCCH DMRS port at the 1 st listening position is the QCL attribute of CSI-RS 1.

In the embodiment of the present application, the QCL attribute of the PDCCH DMRS port at the 1 st listening position in the random access search space is represented by the QCL attribute of SSB 1: the terminal device assumes that the QCL attribute of the PDCCH DMRS port at the 1 st listening position of the random access search space is the QCL attribute of SSB1, and listens to the PDCCH at the 1 st listening position through the QCL attribute of SSB 1. Similarly, in the embodiment of the present application, the QCL attribute of the PDCCH DMRS port at the 1 st listening position in the random access search space is represented by the QCL attribute of CSI-RS 1: the terminal equipment assumes that the QCL attribute of the PDCCH DMRS port on the 1 st monitoring position of the random access search space is the QCL attribute of the CSI-RS1, and monitors the PDCCH on the 1 st monitoring position through the QCL attribute of the CSI-RS 1.

In one implementation, QCL attributes of PDCCH DMRS ports at listening positions in ascending time-domain index cycle correspond to first SSB in ascending SSB index or to first CSI-RS in ascending CSI-RS index. That is, when the number of listening positions included in the RAR time window is greater than the number of SSBs included in the plurality of first SSBs, the QCL attribute of the PDCCH DMRS port at the listening position with the ascending time domain index corresponds to the first SSB with the ascending time domain index, and then corresponds to the first SSB with the new round again. For example, the RAR time window includes 4 listening positions, and the plurality of first SSBs are SSB1 and SSB2, and one listening position corresponds to one first SSB. According to the ascending order of the time domain indexes, the first SSB corresponding to the 1 st monitoring position is SSB1, the first SSB corresponding to the 2 nd monitoring position is SSB2, namely the QCL attribute of the PDCCH DMRS port on the 1 st monitoring position is the QCL attribute of SSB1, and the QCL attribute of the PDCCH DMRS port on the 2 nd monitoring position is the QCL attribute of SSB2. The 1 st listening position and the 2 nd listening position already correspond to a round of first SSB, and the loop corresponds to the representation: the 3 rd listening position may correspond to SSB1 and the 4 th listening position may correspond to SSB2. If the RAR time window includes 6 listening positions, the 5 th listening position and the 6 th listening position may also correspond to a round of the first SSB, i.e. the 5 th listening position corresponds to SSB1 and the 6 th listening position corresponds to SSB2.

In one implementation, for each listening position, determining the SSB index corresponding to the listening position, and taking the QCL attribute of the SSB indicated by the determined SSB index as the QCL attribute of the PDCCH DMRS port at the listening position. Or, for each monitoring position, determining the CSI-RS index corresponding to the monitoring position, and taking the QCL attribute of the CSI-RS indicated by the determined CSI-RS index as the QCL attribute of the PDCCH DMRS port on the monitoring position. In other words, the QCL attribute used for listening to the PDCCH may be determined by SSB indexes of the above-mentioned SSBs (i.e., SSBs received by the terminal device from the network device). In this case, the SSB index corresponding to the listening position may be determined as follows, and thus the QCL attribute used for listening to the PDCCH may be determined: and determining an intermediate value corresponding to the monitoring position through the following formula, and taking the SSB index corresponding to the intermediate value as the SSB index corresponding to the monitoring position. Further, the QCL attribute of the SSB indicated by the SSB index corresponding to the listening position is used as the QCL attribute used for listening to the PDCCH at the listening position. The intermediate value has one or more values, each value of the intermediate value corresponding to an SSB index. It may be understood that the CSI-RS index corresponding to the determined intermediate value may be used as the CSI-RS index corresponding to the listening position, and further, the QCL attribute of the CSI-RS indicated by the CSI-RS index corresponding to the listening position may be used as the QCL attribute used for listening to the PDCCH at the listening position. In the embodiment of the present application, the SSB index corresponding to the intermediate value is taken as an SSB index corresponding to the corresponding listening position for illustration, and the description of how to determine the SSB index corresponding to the listening position can be referred to for the manner of taking the CSI-RS index corresponding to the intermediate value as the CSI-RS index corresponding to the corresponding listening position.

Example 1, taking the intermediate value corresponding to the ith listening position of the random access search space as f1 (i) as an example, f1 (i) can be determined by the following formula:

f1 (i) =mod (i, maxO) formula (1)

In formula (1), mod () is a remainder function. maxO represents the number of the above-mentioned plurality of SSBs. 1.ltoreq.i.ltoreq.i, I representing the number of listening positions included in the RAR time window. Alternatively, the plurality of SSBs may be all SSBs of a cell.

Taking an example that the RAR time window includes 10 listening positions and the number of the SSBs is 4, it can be determined according to the formula (1), where the intermediate values corresponding to the 10 listening positions in the ascending order of the time domain index are respectively: 1. 2, 3, 0, 1, 2. The intermediate values corresponding to the 10 listening positions have 4 values, and for example, the SSB indexes of the 4 SSBs are respectively 0, 1, 2, and 3, and the corresponding relationship between the intermediate values and the SSB indexes may be shown in table 1.

Table 1 correspondence between intermediate values and SSB indices

Intermediate value	SSB index corresponding to intermediate value
		1	0
2	1
		3	2
0	3

For example, the RAR time window includes 10 slots (slots), one slot includes one listening position, and the above 4 SSBs are SSB0, SSB1, SSB2, and SSB3 (the arabic numerals after SSBs indicate SSB indexes thereof), respectively. As can be derived from equation (1) and table 1, a schematic diagram of the terminal device listening to PDCCH is shown in fig. 5, where gray filled time slots represent: the QCL attribute of the PDCCH DMRS port at the listening position included in the slot is the QCL attribute of SSB0, that is, the terminal device listens to the PDCCH at the listening position included in the slot through the QCL attribute of SSB 0. The grid filled time slots represent: the QCL attribute of the PDCCH DMRS port at the listening position included in the slot is the QCL attribute of SSB1, that is, the terminal device listens to the PDCCH at the listening position included in the slot through the QCL attribute of SSB 1. White filled time slots represent: the QCL attribute of the PDCCH DMRS port at the listening position included in the slot is the QCL attribute of SSB2, that is, the terminal device listens to the PDCCH at the listening position included in the slot through the QCL attribute of SSB 2. The diagonally filled slots represent: the QCL attribute of the PDCCH DMRS port at the listening position included in the time slot is the QCL attribute of SSB3, that is, the terminal device listens to the PDCCH at the listening position included in the time slot through the QCL attribute of SSB 3.

It should be noted that, in fig. 5, the search space Period is 1slot (for example, type 1CSS period=1 slot), and there is only one listening position in 1slot, where the RAR time window includes 10 listening positions. In other embodiments, the search space period may be multiple slots. For example, taking Type 1CSS period=2 slots, and only one listening position in 1slot as an example, the schematic diagram of the terminal device listening to PDCCH shown in fig. 5 is changed to fig. 6.Type 1CSS period=2 slot means: the PDCCH is listened to once every 2 slots. In this case, the RAR time window includes 5 listening positions. As can be seen from fig. 6, the 5 listening positions are respectively: listening positions in slot 0, slot 2, slot 4, slot 6 and slot 8.

In one implementation, the plurality of listening positions of the random access search space corresponds to a first SSB, including: the plurality of listening positions with consecutive time domain indexes correspond to one first SSB. Alternatively, the plurality of listening positions corresponds to one first CSI-RS including: the plurality of listening positions with consecutive time domain indexes correspond to one first CSI-RS. In the schematic diagram of fig. 7, where the terminal device listens to the PDCCH, taking an example where the RAR time window includes 10 slots and one slot includes one listening position, where the first SSB corresponding to the listening position with consecutive time-domain indexes (i.e. the listening position in the 0-slot 4) is SSB0, and the first SSB corresponding to the listening position with consecutive time-domain indexes (i.e. the listening position in the 5-slot 9) is SSB1. Namely, the terminal equipment monitors the PDCCH through the QCL attribute of the SSB0 at the first 5 monitoring positions, and monitors the PDCCH through the QCL attribute of the SSB1 at the last 5 monitoring positions. In this way, it is possible to cause a plurality of listening positions consecutive in the RAR time window to listen to the PDCCH using the QCL attribute of the same SSB. The beams associated with the same SSB are the same, so that the terminal equipment does not need to perform beam scanning frequently, i.e. the same beam is used for monitoring the PDCCH at every 5 continuous monitoring positions, which is beneficial to reducing the power consumption of the terminal equipment. The meaning of each padding slot in fig. 7 is referred to in the above detailed description of fig. 5, and will not be repeated here.

Example 2 taking the intermediate value corresponding to the ith listening position of the random access search space as f2 (i) as an example, f2 (i) can be determined by the following formula:

f2 (I) =floor ((I-1)/[ floor (I/maxO) ]) formula (2)

In formula (2), floor () is a downward rounding function. maxO represents the number of the above-mentioned plurality of SSBs. 1.ltoreq.i.ltoreq.i, I representing the number of listening positions included in the RAR time window.

For example, taking the RAR time window including 10 listening positions and the number of the SSBs being 4 as an example, according to formula (2), f2 (i) =floor ((i-1)/[ floor (10/4) ]) =floor ((i-1)/2), the intermediate values corresponding to the 10 listening positions in ascending order of the time domain index are respectively: 0. 0, 1, 2, 3, 4. The intermediate values corresponding to the 10 monitoring positions have 5 values. For example, taking SSB indexes of the 4 SSBs as 0, 1, 2, and 3, respectively, the correspondence between the intermediate value and the SSB index may be as shown in table 2. In Table 2, intermediate value cycles correspond to the ascending SSB index, i.e., intermediate values 0-3 correspond to SSB indices 0-3, respectively, followed by every 4 intermediate values corresponding to SSB indices 0-3, respectively. For example, intermediate values 4-7 correspond to SSB indices 0-3, respectively, intermediate values 8-11 correspond to SSB indices 0-3, respectively, and so on.

Table 2 correspondence between intermediate values and SSB indices

For example, taking an example that the RAR time window includes 10 slots (slots), one slot includes one listening position, type1CSS period=2 slots, and the above 4 SSBs are SSB0, SSB1, SSB2, SSB3 (the arabic numerals after SSBs represent SSB indexes thereof), respectively. As can be derived from the formula (2) and the table 2, a schematic diagram of the terminal device monitoring the PDCCH is shown in fig. 8, and the meaning of each padding slot in fig. 8 is referred to the above detailed description in fig. 5, which is not repeated here.

By way of example 2, the QCL properties of the same SSB can be made to be used per floor (I/maxO) of adjacent (or consecutive) listening positions in the RAR time window. The beams associated with the same SSB are the same, so that the QCL attribute of the same SSB is used for each adjacent (or continuous) listening position of floor (I/maxO), so that the terminal device does not need to perform beam scanning frequently, that is, the same beam is used for receiving PDCCH for each adjacent (or continuous) listening position of floor (I/maxO), which is beneficial to reducing power consumption of the terminal device.

In one implementation, the plurality of listening positions of the random access search space corresponds to a first SSB, including: the K listening positions correspond to one first SSB, or the plurality of listening positions of the random access search space correspond to one first CSI-RS, including: the K monitoring positions correspond to a first CSI-RS; k is a positive integer less than N, and N is the number of preamble sent to the network device by the plurality of RO. Illustratively, in fig. 5, one first SSB corresponding to 3 listening positions (i.e., listening positions in time slot 0, time slot 4, and time slot 8) is SSB0, and one first SSB corresponding to 2 listening positions (i.e., listening positions in time slot 2 and time slot 6) is SSB2. In fig. 7, one first SSB corresponding to the first 5 listening positions is SSB0, and one first SSB corresponding to the second 5 listening positions is SSB1.

In one implementation, K may be the minimum of the first number and the second number; the first number may be the number of SSBs associated with the ROs among the SSBs, or the first number may be the number of CSI-RS associated with the ROs among the CSI-RS; the second number may be a number of QCL attributes of the network configuration, and the second number may be determined based on the first configuration information from the network device. In this way, the number of QCL attributes used in the process of the terminal device listening to the PDCCH can be limited. The first configuration information may be carried in higher layer signaling. Alternatively, the plurality of ROs may be associated with a plurality of SSBs, and the first number may be the number of beams associated with the plurality of SSBs (i.e., the plurality of SSBs associated with the plurality of ROs). Alternatively, the first number may be the number of beams used to transmit the preamble, or the first number may be the number of beams used to transmit Msg 1. Alternatively, the plurality of ROs may be associated with a plurality of CSI-RS, and the first number may be the number of beams associated with the plurality of CSI-RS (i.e., the plurality of CSI-RS associated with the plurality of ROs).

In one implementation, the QCL attribute used for listening to the PDCCH may be determined by the relative transmit time domain position of the terminal device transmitting the preamble. For example, taking the example that the terminal device sends preamble1 on slot 9 and preamble2 1 on slot 0, the QCL attribute used for monitoring the PDCCH may be determined according to slot 9 and slot 0. Alternatively, the QCL attribute used for listening to the PDCCH may be determined according to the QCL attribute of the SSB (or CSI-RS) associated with the preamble transmitted on slot 9 and the QCL attribute of the SSB (or CSI-RS) associated with the preamble transmitted on slot 0. In other words, the terminal device may determine QCL attributes used for listening to the PDCCH according to QCL attributes of SSBs (or CSI-RS) associated with the transmitted preamble. In this case, the SSB index corresponding to the listening position may be determined as follows, and thus the QCL attribute used for listening to the PDCCH may be determined: and determining an intermediate value corresponding to the monitoring position through the following formula, and taking the SSB index corresponding to the intermediate value as the SSB index corresponding to the monitoring position. Further, the QCL attribute of the SSB indicated by the SSB index corresponding to the listening position is used as the QCL attribute used for listening to the PDCCH at the listening position. It is to be understood that the difference from the above examples 1 and 2 is that "the above SSBs" in the above examples 1 and 2 are changed to "SSBs associated with preambles transmitted by terminal apparatuses".

Example 3, taking the intermediate value corresponding to the ith listening position of the random access search space as f3 (i) as an example, f3 (i) can be determined by the following formula:

f3 (i) =mod (i, N) formula (3)

In formula (3), mod () is a remainder function. N represents the number of preambles transmitted to the network device through the ROs. 1.ltoreq.i.ltoreq.i, I representing the number of listening positions included in the RAR time window.

For example, the RAR time window includes 10 listening positions, and the terminal device transmits preamble1 on slot 9 and preamble2 1 on slot 0. According to the formula (3), it can be determined that the intermediate values corresponding to the 10 listening positions respectively according to the ascending order of the time domain indexes are respectively: 1. 0, 1, 0. If preamble1 is associated with SSB0 and preamble2 is associated with SSB1, the correspondence between the value of the intermediate value and the SSB index is shown in table 3. Then, the schematic diagram of the terminal device monitoring the PDCCH may be shown in fig. 9, and the meaning of each padding slot in fig. 9 is referred to in the above detailed description in fig. 5, which is not repeated here.

Table 3 correspondence between intermediate values and SSB indices

Intermediate value	SSB index corresponding to intermediate value
		1	0
0	1

It should be noted that, at least one symbol is spaced between the start time of the RAR time window and the last symbol of the RO. For example, referring to fig. 9, the last symbol of the RO (i.e., the last symbol of the RO carrying preamble 2) is separated from the start of the RAR time window by one slot (i.e., the first slot 1 in fig. 9).

Example 4, taking the intermediate value corresponding to the ith listening position of the random access search space as f4 (i) as an example, f4 (i) can be determined by the following formula:

f4 (i) =mod (i, M) formula (4)

In formula (4), mod () is a function of the remainder. M is a positive integer less than N, N represents the number of preamble transmitted to the network device through the plurality of RO. 1.ltoreq.i.ltoreq.i, I representing the number of listening positions included in the RAR time window. Optionally, m=n/2, or M is the minimum value of the first number and the second number.

In example 5, taking the intermediate value corresponding to the ith listening position of the random access search space as f5 (i) as an example, f5 (i) can be determined by the following formula:

f5 (I) =floor ((I-1)/[ floor (I/N) ]) formula (5)

In formula (5), floor () is a downward rounding function. N represents the number of preambles transmitted to the network device through the ROs. 1.ltoreq.i.ltoreq.i, I representing the number of listening positions included in the RAR time window.

For example, the RAR time window includes 10 listening positions, and the terminal device transmits preamble1 on slot 9 and preamble2 1 on slot 0. According to the formula (5), f5 (i) =floor ((i-1)/[ floor (10/2) ]) =floor ((i-1)/5) can be determined, and the intermediate values respectively corresponding to the 10 listening positions in the ascending order of the time domain index are respectively: 0. 0, 1 1, 1. If preamble1 is associated with SSB0 and preamble2 is associated with SSB1, the correspondence between the value of the intermediate value and the SSB index is shown in table 3. Then, the schematic diagram of the terminal device monitoring the PDCCH may be shown in fig. 10, and the meaning of each padding slot in fig. 10 is referred to in the above detailed description in fig. 5, which is not repeated here. Alternatively, N in formula (5) may be replaced by M as described above.

By way of example 5, the QCL properties of the same SSB can be made to be used per floor (I/N) of adjacent (or consecutive) listening locations in the RAR time window. Alternatively, it may be understood that the RAR time window is divided into N segments, the same QCL attribute is used in the same segment, and different QCL attributes are used in different segments. The beams associated with the same SSB are the same, so that the QCL attribute of the same SSB is used for each floor (I/N) of adjacent (or continuous) listening positions, so that the terminal device does not need to perform beam scanning frequently, that is, the same beam is used for each floor (I/N) of adjacent (or continuous) listening positions to receive the PDCCH, which is beneficial to reducing the power consumption of the terminal device.

In one implementation, PDCCH DMRS ports at different listening positions of the random access search space have different QCL attributes, or PDCCH DMRS ports at different listening positions have the same QCL attributes. Illustratively, PDCCH DMRS ports at the first 5 listening positions in fig. 10 have the same QCL attribute, PDCCH DMRS ports at the last 5 listening positions have the same QCL attribute, but PDCCH DMRS ports at the first 5 listening positions and the last 5 listening positions have different QCL attributes.

In one implementation manner, the network device may send second configuration information to the terminal device, where the second configuration information carries a parameter W, and the second configuration information is used to configure a length of an RAR time window to be w×n, where N is a number of preamble times sent by the terminal device to the network device through the multiple ROs; correspondingly, the terminal equipment receives the second configuration information and determines that the length of the RAR time window is W.times.N according to the second configuration information. Further, the terminal device monitors the PDCCH in the RAR time window. Wherein W may be a high-level parameter such as ra-responseWindow. Illustratively, W has a value in the range {1,2,4,8,10,20,40,80 160}slots.

S404, the network equipment sends the PDCCH to the terminal equipment. Correspondingly, the terminal equipment monitors the PDCCH according to the QCL attribute determined by the first SSB in the SSB or the first CSI-RS in the CSI-RS.

The QCL attribute of the PDCCH DMRS port is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a PDSCH, where the PDSCH carries an RAR for the preamble.

After the network device receives the preamble from the terminal device on the ROs, the network device may send the PDCCH and the DMRS to the terminal device through the QCL attribute of one SSB of the SSBs sent to the terminal device in S401, or send the PDCCH and the DMRS to the terminal device through the QCL attribute of one CSI-RS of the CSI-RS sent to the terminal device in S401.

Alternatively, the network device may receive only a portion of the preamble transmitted by the terminal device on the ROs, in which case the network device may transmit the PDCCH and the DMRS through QCL attributes of the SSB (or CSI-RS) associated with the received preamble. For example, taking SSB0, SSB1, SSB2, SSB3 as 4 SSBs sent by the network device to the terminal device, the terminal device sends preamble1 time in slot 9, preamble2 time in slot 0, and preamble3 time in slot 1 as an example. Wherein, preamble1 associates SSB0, preamble2 associates SSB1, and preamble3 associates SSB2. If the network device only receives preamble1 and preamble2 and does not receive preamble3, the network device may send PDCCH and DMRS through the QCL attribute of the SSB associated with preamble1 (i.e. SSB 0), and correspondingly, the terminal device may only monitor PDCCH at the listening position of the QCL attribute of the PDCCH DMRS port being the QCL attribute of SSB0, but may not monitor PDCCH at the listening position of the QCL attribute of the PDCCH DMRS port being the QCL attribute of SSB 1. For example, in fig. 10, the terminal device may monitor the PDCCH on the last 5 listening positions, but may not monitor the PDCCH on the first 5 listening positions. Alternatively, in the above example, the network device may send the PDCCH and DMRS through the QCL attribute of the SSB (i.e., SSB 1) associated with preamble2, and accordingly, the terminal device may only monitor the PDCCH at the listening position of the QCL attribute of the PDCCH DMRS port being the QCL attribute of SSB1, and may not monitor the PDCCH at the listening position of the QCL attribute of the PDCCH DMRS port being the QCL attribute of SSB 0.

According to the embodiment of the application, the network equipment sends a plurality of SSB or a plurality of CSI-RS to the terminal equipment, the terminal equipment respectively sends the preamble to the network equipment through a plurality of RO, after the network equipment receives the preamble, the QCL attribute of a PDCCH DMRS port can be determined through the first SSB in the SSB or the first CSI-RS in the CSI-RS, and the PDCCH is sent to the terminal equipment through the determined QCL attribute. Accordingly, after the terminal device sends the preamble, the terminal device may determine the QCL attribute of the PDCCH DMRS port according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, that is, the terminal device monitors the PDCCH through the determined QCL attribute, which helps to improve the possibility that the terminal device successfully monitors the PDCCH, and further, the terminal device may receive the PDSCH according to the indication of the PDCCH DCI and parse the PDSCH payload to obtain the RAR message, thereby being beneficial to improving the success rate of random access.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a random access device according to an embodiment of the present application. As shown in fig. 11, the random access device 110 includes a receiving unit 1101, a transmitting unit 1102, and a listening unit 1103. The random access means 110 may perform the relevant steps of the terminal device in the foregoing method embodiments.

A receiving unit 1101, configured to receive a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS from a network device;

a sending unit 1102, configured to send preamble preambles to the network device through a plurality of random access opportunities ROs respectively;

a monitoring unit 1103, configured to monitor a physical downlink control channel PDCCH at a monitoring position of a random access search space in a random access response RAR time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries a RAR for the preamble.

In an alternative embodiment, the receiving unit 1101 may be further configured to: and receiving second configuration information from the network equipment, wherein the second configuration information carries the parameter W. The random access device 110 further includes a determining unit 1104, where the determining unit 1104 is configured to determine, according to the second configuration information, that the length of the RAR time window is w×n; n is the number of preamble transmitted to the network device through the ROs, respectively.

The random access device 110 may also be used to implement other functions of the terminal device in the corresponding embodiment of fig. 4, which are not described herein. Based on the same inventive concept, the principle and beneficial effects of the random access device 110 provided in the embodiment of the present application are similar to those of the terminal device in the embodiment of the method of the present application, and may refer to the principle and beneficial effects of the implementation of the method, which are not described herein for brevity.

Referring to fig. 12, fig. 12 is a schematic structural diagram of another random access device according to an embodiment of the present application. As shown in fig. 12, the random access device 120 includes a transmitting unit 1201 and a receiving unit 1202.

A transmitting unit 1201, configured to transmit a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS to a terminal device;

a receiving unit 1202, configured to receive a preamble from a terminal device, where the preamble is sent by the terminal device to a network device through a plurality of random access opportunities ROs respectively;

a sending unit 1201, configured to send a physical downlink control channel PDCCH to the terminal device; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a physical downlink shared channel PDSCH, where the PDSCH carries a random access response RAR for the preamble.

In an alternative embodiment, the sending unit 1201 is further configured to send the second configuration information to the terminal device; the second configuration information carries a parameter W, and is used for configuring the length of the RAR time window to be W x N; n is the number of preamble sent to the network device by the terminal device through the plurality of RO respectively, and the terminal device monitors the PDCCH in the RAR time window.

The random access device 120 may also be used to implement the functions of the network device in the corresponding embodiment of fig. 4, which is not described herein. Based on the same inventive concept, the principle and beneficial effects of the random access device 120 provided in the embodiment of the present application are similar to those of the network device in the embodiment of the method of the present application, and may refer to the principle and beneficial effects of the implementation of the method, which are not described herein for brevity.

Referring to fig. 13, fig. 13 is a schematic diagram illustrating another random access device 130 according to an embodiment of the present application. The method can be used for realizing the functions of the terminal equipment in the method embodiment or the functions of the network equipment in the method embodiment. The random access device 130 may include a transceiver 1301 and a processor 1302. Optionally, the random access device may further comprise a memory 1303. Wherein the transceiver 1301, the processor 1302, the memory 1303 may be connected by a bus 1304 or other means. The bus is shown in bold lines in fig. 13, and the manner in which other components are connected is merely illustrative and not limiting. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 13, but not only one bus or one type of bus.

The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. The specific connection medium between the transceiver 1301, the processor 1302, and the memory 1303 is not limited in the embodiment of the present application.

Memory 1303 may include read-only memory and random access memory, and provides instructions and data to processor 1302. A portion of memory 1303 may also include non-volatile random access memory.

The processor 1302 may be a central processing unit (Central Processing Unit, CPU), the processor 1302 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor, but in the alternative, the processor 1302 may be any conventional processor or the like.

In one example, when the terminal device takes the form shown in fig. 13, a processor 1302 is configured to invoke the transceiver 1301 to receive a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS from the network device; the processor 1302 is further configured to invoke the transceiver 1301 to send preamble preambles to the network device through a plurality of random access occasions RO, respectively; the processor 1302 is further configured to monitor a physical downlink control channel PDCCH at a listening position of a random access search space within a random access response RAR time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries a RAR for the preamble.

In an alternative embodiment, the processor 1302 is further configured to invoke the transceiver 1301 to receive second configuration information from the network device, the second configuration information carrying the parameter W. The processor 1302 is further configured to determine, according to the second configuration information, that the length of the RAR time window is w×n; n is the number of preamble transmitted to the network device through the ROs, respectively.

In particular, in the case that the terminal device takes the form shown in fig. 13, the transceiver 1301 and the processor 1302 may also perform other operations, and reference may be made to the description of the terminal device in the above-mentioned embodiment corresponding to fig. 4.

In one example, when the network device takes the form shown in fig. 13, a processor 1302 is configured to invoke a transceiver 1301 to transmit a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS to the terminal device; the processor 1302 is further configured to invoke the transceiver 1301 to receive a preamble from the terminal device, where the preamble is sent by the terminal device to the network device through a plurality of random access occasions RO; the processor 1302 is further configured to invoke the transceiver 1301 to send a physical downlink control channel PDCCH to the terminal device; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a physical downlink shared channel PDSCH, where the PDSCH carries a random access response RAR for the preamble.

In an alternative embodiment, the processor 1302 is further configured to invoke the transceiver 1301 to send the second configuration information to the terminal device; the second configuration information carries a parameter W, and is used for configuring the length of the RAR time window to be W x N; n is the number of preamble sent to the network device by the terminal device through the plurality of RO respectively, and the terminal device monitors the PDCCH in the RAR time window.

In particular, where the network device takes the form shown in fig. 13, the transceiver 1301 and the processor 1302 may also perform other operations, and reference may be made specifically to the description of the network device in the corresponding embodiment of fig. 4 above.

In an alternative embodiment, memory 1303 is used to store program instructions; the processor 1302 is configured to invoke the program instructions stored in the memory 1303, so as to execute the steps executed by the terminal device and the network device in the corresponding embodiment of fig. 4. Specifically, the functions/implementation procedures of the receiving unit, the transmitting unit, the listening unit, and the determining unit in fig. 11 may be implemented by the processor 1302 in fig. 13 calling computer-executable instructions stored in the memory 1303. Alternatively, the functions/implementation procedure of the listening unit, the determining unit of fig. 11 may be implemented by the processor 1302 in fig. 13 calling computer-executable instructions stored in the memory 1303, and the functions/implementation procedure of the receiving unit, the transmitting unit of fig. 11 may be implemented by the transceiver 1301 in fig. 13. The functions/implementation procedures of the transmitting unit and the receiving unit of fig. 12 may be implemented by the processor 1302 in fig. 13 calling computer-executable instructions stored in the memory 1303. Alternatively, the functions/implementation procedures of the transmitting unit and the receiving unit of fig. 12 may be implemented by the transceiver 1301 of fig. 13.

In the embodiments of the present application, the methods provided by the embodiments of the present application can be implemented by running a computer program (including program code) capable of executing the steps involved in the above-described methods on a general-purpose computing device such as a computer, including a processing element such as a CPU, a random access storage medium (Random Access Memory, RAM), a Read-Only Memory (ROM), or the like, and a storage element. The computer program may be recorded on, for example, a computer-readable recording medium, and loaded into and run in the above-described computing device through the computer-readable recording medium.

Based on the same inventive concept, the principle and beneficial effects of the random access device 130 provided in the embodiment of the present application for solving the problem are similar to those of the terminal device and the network device in the embodiment of the method of the present application, and may refer to the principle and beneficial effects of the implementation of the method, which are not described herein for brevity.

The random access devices (e.g., random access device 110, random access device 120, random access device 130) may be, for example: a chip, or a chip module.

The embodiment of the application also provides a chip which can execute the relevant steps of the terminal equipment and the network equipment in the embodiment of the method.

For the case where the chip is used to realize the functions of the terminal device in the above embodiment:

the chip is used for:

receiving a plurality of synchronization signal blocks SSB or a plurality of channel state information reference signals CSI-RS from a network device;

respectively sending a preamble to the network equipment through a plurality of random access occasions RO;

monitoring a Physical Downlink Control Channel (PDCCH) at a monitoring position of a random access search space in a Random Access Response (RAR) time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries a RAR for the preamble.

In an alternative embodiment, the chip may also be used to: receiving second configuration information from the network equipment, wherein the second configuration information carries a parameter W; determining the length of the RAR time window as W.times.N according to the second configuration information; n is the number of preamble transmitted to the network device through the ROs, respectively.

In particular, in this case, the operations performed by the chip may be described with reference to the terminal device in the embodiment corresponding to fig. 4.

For the case where the chip is used to implement the functions of the network device in the above embodiment:

the chip is used for:

transmitting a plurality of synchronization signal blocks SSB or a plurality of channel state information reference signals CSI-RS to a terminal device;

receiving a preamble from a terminal device, wherein the preamble is sent to a network device by the terminal device through a plurality of random access occasions RO;

transmitting a Physical Downlink Control Channel (PDCCH) to the terminal equipment; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a physical downlink shared channel PDSCH, where the PDSCH carries a random access response RAR for the preamble.

In an alternative embodiment, the chip is further configured to send second configuration information to the terminal device; the second configuration information carries a parameter W, and is used for configuring the length of the RAR time window to be W x N; n is the number of preamble sent to the network device by the terminal device through the plurality of RO respectively, and the terminal device monitors the PDCCH in the RAR time window.

In particular, in this case, the operations performed by the chip may refer to the description of the network device in the embodiment corresponding to fig. 4.

In one possible implementation, the chip includes at least one processor, at least one first memory, and at least one second memory; wherein the at least one first memory and the at least one processor are interconnected by a circuit, and instructions are stored in the first memory; the at least one second memory and the at least one processor are interconnected by a line, where the second memory stores data to be stored in the embodiment of the method.

For each device and product applied to or integrated in the chip, each module contained in the device and product can be realized in a hardware mode such as a circuit, or at least part of the modules can be realized in a software program, the software program runs on a processor integrated in the chip, and the rest (if any) of the modules can be realized in a hardware mode such as a circuit.

Based on the same inventive concept, the principle and beneficial effects of solving the problem of the chip provided in the embodiment of the present application are similar to those of solving the problem of the terminal device and the network device in the embodiment of the method of the present application, and can be referred to the principle and beneficial effects of implementing the method, which are not described herein for brevity.

Referring to fig. 14, fig. 14 is a schematic structural diagram of a chip module according to an embodiment of the application. The chip module 140 may perform the steps related to the terminal device and the network device in the foregoing method embodiment, where the chip module 140 includes: a communication interface 1401, and a chip 1402.

The communication interface is used for carrying out internal communication of the chip module or carrying out communication between the chip module and external equipment; the chip is used for realizing functions of terminal equipment and network equipment in the embodiment of the application, and particularly, the corresponding embodiment of fig. 3-5 is referred. Optionally, the chip module 140 may further include a memory module 1403 and a power module 1404. The memory module 1403 is used to store data and instructions. The power module 1404 is used for providing power to the chip module.

For each device and product applied to or integrated in the chip module, each module included in the device and product may be implemented by hardware such as a circuit, and different modules may be located in the same component (e.g. a chip, a circuit module, etc.) of the chip module or different components, or at least some modules may be implemented by using a software program, where the software program runs on a processor integrated in the chip module, and the remaining (if any) modules may be implemented by hardware such as a circuit.

Embodiments of the present application also provide a computer readable storage medium having one or more instructions stored therein, the one or more instructions being adapted to be loaded by a processor and to perform the method provided by the above-described method embodiments.

The present application also provides a computer program product comprising a computer program or instructions which, when run on a computer, cause the computer to perform the method provided by the method embodiments described above.

The embodiment of the application also provides a random access system, which can comprise the terminal equipment and the network equipment in the corresponding embodiment of fig. 4.

With respect to each of the apparatuses and each of the modules/units included in the products described in the above embodiments, it may be a software module/unit, a hardware module/unit, or a software module/unit, and a hardware module/unit. For example, for each device or product applied to or integrated on a chip, each module/unit included in the device or product may be implemented in hardware such as a circuit, or at least part of the modules/units may be implemented in software program, where the software program runs on a processor integrated inside the chip, and the rest (if any) of the modules/units may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module/unit contained in the device and product can be realized in a hardware manner such as a circuit, different modules/units can be located in the same component (such as a chip, a circuit module and the like) or different components of the chip module, or at least part of the modules/units can be realized in a software program, the software program runs on a processor integrated in the chip module, and the rest (if any) of the modules/units can be realized in a hardware manner such as a circuit; for each device, product, or application to or integrated with the terminal, each module/unit included in the device, product, or application may be implemented by using hardware such as a circuit, different modules/units may be located in the same component (for example, a chip, a circuit module, or the like) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program, where the software program runs on a processor integrated inside the terminal, and the remaining (if any) part of the modules/units may be implemented by using hardware such as a circuit.

It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of action described, as some steps may be performed in other order or simultaneously according to the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.

The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.

The modules in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.

Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in a computer readable storage medium, and the readable storage medium may include: flash disk, ROM, RAM, magnetic or optical disk, etc.

The foregoing disclosure is merely a preferred embodiment of the present application, but is not intended to limit the scope of the claims.

Claims

1. A random access method, comprising:

monitoring a Physical Downlink Control Channel (PDCCH) at a monitoring position of a random access search space in a Random Access Response (RAR) time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a physical downlink shared channel PDSCH, where the PDSCH carries a RAR for the preamble.

2. The method of claim 1, wherein pdcchd mrs ports at different listening positions of the random access search space have different QCL attributes.

3. The method of claim 1 or 2, wherein the first SSB comprises the plurality of SSBs or the first CSI-RS comprises the plurality of CSI-RSs.

4. The method of claim 1 or 2, wherein the first SSB comprises an SSB of the plurality of SSBs associated with the preamble or wherein the first CSI-RS comprises a CSI-RS of the plurality of CSI-RS associated with the preamble.

5. The method of any of claims 1-4, wherein the number of first SSBs is a plurality or the number of first CSI-RSs is a plurality;

the monitoring positions of the time domain index ascending sequence sequentially correspond to the first SSB of the SSB index ascending sequence or sequentially correspond to the first CSI-RS of the CSI-RS index ascending sequence, one or more monitoring positions correspond to one of the first SSB, and one or more monitoring positions correspond to one of the first CSI-RS;

for the ith monitoring position of the random access search space, the QCL attribute of the PDCCH DMRS port on the ith monitoring position is the QCL attribute of the first SSB or the first CSI-RS corresponding to the ith monitoring position.

6. The method of claim 5, wherein QCL attributes of PDCCH DMRS ports at the listening position in ascending time domain index cycle corresponds to the first SSB of SSB index ascending or cycles corresponds to the first CSI-RS of CSI-RS index ascending.

7. The method of claim 5 or 6, wherein the plurality of listening positions corresponds to one of the first SSBs comprising: a plurality of monitoring positions with continuous time domain indexes correspond to one first SSB; or, the plurality of listening positions correspond to one of the first CSI-RS, including: and a plurality of monitoring positions with continuous time domain indexes correspond to one first CSI-RS.

8. The method of claim 5 or 6, wherein the plurality of listening positions corresponds to one of the first SSBs comprising: k listening positions correspond to one of the first SSBs, or the plurality of listening positions correspond to one of the first CSI-RS, including: k monitoring positions correspond to one first CSI-RS;

and K is a positive integer smaller than N, wherein N is the number of preamble times sent to the network equipment through the RO.

9. The method of claim 8, wherein K is the minimum of the first number and the second number;

wherein the first number is a number of SSBs of the plurality of SSBs associated with the plurality of ROs, or the first number is a number of CSI-RS of the plurality of CSI-RS associated with the plurality of ROs; the second number is a number of QCL attributes of a network configuration, the second number being determined from first configuration information from the network device.

10. The method according to claim 1 or 2, wherein the first SSB comprises: and SSB associated with the preamble indicated by the preset index in the preambles respectively sent to the network equipment by the plurality of RO.

11. The method according to any one of claims 1-10, further comprising:

receiving second configuration information from the network equipment, wherein the second configuration information carries a parameter W;

determining the length of the RAR time window as W.N according to the second configuration information; and the N is the number of times of preamble sent to the network equipment through the RO respectively.

12. A random access method, comprising:

receiving a preamble from the terminal equipment, wherein the preamble is sent to network equipment by the terminal equipment through a plurality of random access opportunities RO;

transmitting a Physical Downlink Control Channel (PDCCH) to the terminal equipment; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal is determined according to a first SSB of the SSBs or a first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries a random access response RAR for the preamble.

13. The method of claim 12, wherein the first SSB comprises the plurality of SSBs or the first CSI-RS comprises the plurality of CSI-RS.

14. The method of claim 12, wherein the first SSB comprises an SSB of the plurality of SSBs associated with the preamble or wherein the first CSI-RS comprises a CSI-RS of the plurality of CSI-RS associated with the preamble.

15. The method of claim 12, wherein the first SSB comprises: and the terminal equipment respectively sends the preamble which is related to the preamble indicated by the preset index to the network equipment through the plurality of RO.

16. The method according to any one of claims 12-15, further comprising:

sending second configuration information to the terminal equipment;

the second configuration information carries a parameter W, and is used for configuring the length of the RAR time window to be w×n; and the N is the times of preamble sent to the network equipment by the terminal equipment through the RO, and the terminal equipment monitors the PDCCH in the RAR time window.

17. A random access device, characterized in that the device comprises a receiving unit, a transmitting unit and a monitoring unit;

the receiving unit is configured to receive a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS from a network device;

The sending unit is configured to send preamble preambles to the network device through a plurality of random access opportunities RO, respectively;

the monitoring unit is used for monitoring a physical downlink control channel PDCCH at a monitoring position of a random access search space in a random access response RAR time window; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal at the listening position of the random access search space is determined according to the first SSB of the SSBs or the first CSI-RS of the CSI-RS, and the PDCCH is used for scheduling a physical downlink shared channel PDSCH, where the PDSCH carries a RAR for the preamble.

18. A random access device, characterized in that the device comprises a receiving unit and a transmitting unit;

the sending unit is configured to send a plurality of synchronization signal blocks SSBs or a plurality of channel state information reference signals CSI-RS to a terminal device;

the receiving unit is configured to receive a preamble from the terminal device, where the preamble is sent by the terminal device to a network device through a plurality of random access opportunities ROs respectively;

the sending unit is configured to send a physical downlink control channel PDCCH to the terminal device; the quasi co-location QCL attribute of the DMRS port of the PDCCH demodulation reference signal is determined according to a first SSB of the SSBs or a first CSI-RS of the CSI-RS, the PDCCH is used for scheduling a physical downlink shared channel PDSCH, and the PDSCH carries a random access response RAR for the preamble.

19. A random access device comprising a processor;

the processor being configured to perform the method of any one of claims 1 to 16.