Random access method and apparatus, and device, chip and storage medium

Abstract

Provided in the embodiments of the present application are a random access method and apparatus, and a device, a chip and a storage medium. The method comprises: a terminal device executing a random access process on the basis of cell discontinuous reception (DRX) and / or cell discontinuous transmission (DTX).

Description

Random access method and device, equipment, chip and storage medium TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of mobile communication technology, in particular to a random access method and device, equipment, chip and storage medium. BACKGROUND

[0002] In some scenarios, during the non-continuous transmission (DTX) / non-continuous reception (DRX) inactivation time of a cell, the terminal device cannot receive or send any channel. For the cell DTX / DRX that cannot receive or send a channel during the inactivation time, how to complete the random access process is a problem to be solved.

[0003] SUMMARY

[0004] Embodiments of the present application provide a random access method and device, equipment, chip and storage medium.

[0005] In a first aspect, the random access method provided by embodiments of the present application comprises:

[0006] The terminal device performs a random access process based on cell discontinuous reception (DRX) and / or cell discontinuous transmission (DTX).

[0007] In a second aspect, the random access method provided by embodiments of the present application comprises:

[0008] The network device sends second information; the second information is used to configure cell DRX and / or cell DTX, and the cell DRX and / or the cell DTX are used for the terminal device to perform a random access process.

[0009] In a third aspect, the random access device provided by embodiments of the present application is applied to a terminal device, and comprises:

[0010] The random access unit is configured to perform a random access process based on cell discontinuous reception (DRX) and / or cell discontinuous transmission (DTX).

[0011] In a fourth aspect, the random access device provided by embodiments of the present application is applied to a network device, and comprises:

[0012] The sending unit is configured to send second information; the second information is used to configure cell DRX and / or cell DTX, and the cell DRX and / or the cell DTX are used for the terminal device to perform a random access process.

[0013] Fifthly, the terminal device provided in the embodiments of this application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-described random access method.

[0014] Sixthly, the network device provided in the embodiments of this application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-described random access method.

[0015] The chip provided in this application embodiment is used to implement the above-described random access method.

[0016] Specifically, the chip includes a processor for retrieving and running a computer program from memory, causing a device equipped with the chip to perform the aforementioned random access method.

[0017] The computer-readable storage medium provided in this application embodiment is used to store a computer program that causes a computer to execute the above-described random access method.

[0018] The computer program product provided in this application includes computer program instructions that cause a computer to execute the above-described random access method.

[0019] The computer program provided in this application embodiment, when run on a computer, causes the computer to execute the above-described random access method.

[0020] According to the random access method in the embodiments of this application, the terminal device can perform a random access procedure based on the cell DRX and / or cell DTX. That is, the terminal device can determine the valid random access resources at the cell DRX and / or cell DTX activation time, and then complete the random access procedure based on the valid random access resources, thereby enabling flexible implementation of the terminal's random access procedure. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 is a schematic diagram of an application scenario of an embodiment of this application;

[0023] Figure 2 is a schematic diagram of a contention-based random access procedure provided in an embodiment of this application;

[0024] Figure 3 is a schematic diagram of a non-contention-based random access procedure provided in an embodiment of this application;

[0025] FIG. 4 is a flowchart of a random access method according to an embodiment of the present application;

[0026] FIG. 5 is a schematic diagram of determining a first RO according to an embodiment of the present application;

[0027] FIG. 6 is a schematic diagram of a starting time of a RAR window according to an embodiment of the present application;

[0028] FIG. 7 is a schematic diagram of an NTN scenario according to an embodiment of the present application;

[0029] FIG. 8 is a schematic diagram of a starting time of a RAR window in an NTN scenario according to an embodiment of the present application;

[0030] FIG. 9 is a schematic diagram of a starting time of a RAR window in an NTN scenario according to an embodiment of the present application;

[0031] FIG. 10 is a schematic diagram of a running time of a RAR window according to an embodiment of the present application;

[0032] FIG. 11 is a schematic diagram of determining a third time domain unit for transmitting a second PUSCH according to an embodiment of the present application;

[0033] FIG. 12 is a schematic diagram of a third time domain unit for repeatedly transmitting a second PUSCH according to an embodiment of the present application;

[0034] FIG. 13 is a schematic diagram of a starting time of a contention resolution timer according to an embodiment of the present application;

[0035] FIG. 14 is a schematic diagram of a starting time of a contention resolution timer in an NTN scenario according to an embodiment of the present application;

[0036] FIG. 15 is a schematic diagram of a running time of a contention resolution timer according to an embodiment of the present application;

[0037] FIG. 16 is a schematic diagram of determining a seventh time domain unit for transmitting a first PUCCH according to an embodiment of the present application;

[0038] FIG. 17 is a schematic diagram of a seventh time domain unit for repeatedly transmitting a first PUCCH according to an embodiment of the present application;

[0039] FIG. 18 is a flowchart of a random access method according to an embodiment of the present application;

[0040] FIG. 19 is a schematic diagram of a random access apparatus 1900 according to an embodiment of the present application;

[0041] FIG. 20 is a schematic diagram of a random access apparatus 2000 according to an embodiment of the present application;

[0042] FIG. 21 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0043] FIG. 22 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0044] FIG. 23 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0046] FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.

[0047] As shown in FIG. 1, the communication system 100 can include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 through an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0048] It should be understood that the embodiments of the present application are only exemplarily described with respect to the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as a Long Term Evolution (LTE) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunication System (UMTS), an Internet of Things (IoT) system, a Narrow Band Internet of Things (NB-IoT) system, an enhanced Machine-Type Communications (eMTC) system, a 5G communication system (also referred to as a New Radio (NR) communication system), a 6th generation mobile communication (6G) system, or a future communication system, etc.

[0049] In the communication system 100 shown in FIG. 1, the network device 120 can be an access network device that communicates with the terminal device 110. The access network device can provide communication coverage for a specific geographic area and can communicate with the terminal device 110 (e.g., a user equipment (UE)) located within the coverage area.

[0050] The network device 120 can be an evolved node B (eNB or eNodeB) in a long term evolution (LTE) system, or a next generation radio access network (NG RAN) device, or a base station (gNB) in an NR system, or a radio controller in a cloud radio access network (CRAN), or a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved public land mobile network (PLMN), etc.

[0051] The terminal device 110 can be any terminal device, including but not limited to a terminal device that uses wired or wireless connection with the network device 120 or other terminal devices.

[0052] For example, the terminal device 110 can refer to an ambient Internet of Things (A-IOT) device, an access terminal, a UE, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handset, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved network, etc.

[0053] The terminal device 110 can be used for device-to-device (D2D) communication.

[0054] The wireless communication system 100 can further include a core network device 130 in communication with the network device 120, which can be a 5G core (5GC) device, e.g., an Access and Mobility Management Function (AMF), e.g., an Authentication Server Function (AUSF), e.g., a User Plane Function (UPF), e.g., a Session Management Function (SMF). Alternatively, the core network device 130 can also be an Evolved Packet Core (EPC) device of an LTE network, e.g., a Session Management Function + Core Packet Gateway (SMF + PGW-C) device. It should be understood that the SMF + PGW-C can implement the functions of both the SMF and the PGW-C. In the evolution of the network, the above-mentioned core network devices can also be called other names, or new network entities can be formed by dividing the functions of the core network, which is not limited by the embodiments of the present application.

[0055] The various functional units in the communication system 100 can also establish connections through a next generation (NG) interface to communicate.

[0056] For example, the terminal device 110 establishes an air interface connection with the network device through the NR interface, which is used to transmit user plane data and control plane signaling; the terminal device 110 can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); the network device, e.g., a next generation radio access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (N3 for short); the network device can establish a control plane signaling connection with the AMF through the NG interface 2 (N2 for short); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (N4 for short); the UPF can interact with the data network to transmit user plane data through the NG interface 6 (N6 for short); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (N11 for short); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (N7 for short).

[0057] Fig. 1 exemplarily shows one network device 120, one core network device 130 and two terminal devices 110. Optionally, the wireless communication system 100 can include multiple network devices 120 and each network device 120 can include other number of terminal devices 110 within its coverage range, which is not limited in the embodiments of the present application.

[0058] It should be noted that Fig. 1 is only schematically shown as an example of the system to which the embodiments of the present application are applicable. Of course, the method shown in the embodiments of the present application can also be applicable to other systems. In addition, the terms "system" and "network" are often used interchangeably in the present application. The term "and / or" in the present application is only used to describe the association relationship of the associated objects. It means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects. It should also be understood that the "indication" mentioned in the embodiments of the present application can be direct indication or indirect indication, and can also represent an associated relationship. For example, A indicates B can mean that B can be obtained by A directly; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship. It should also be understood that the "corresponding" mentioned in the embodiments of the present application can represent a direct corresponding or indirect corresponding relationship between the two, or can represent an associated relationship between the two, or can mean an indication and being indicated, a configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rule" mentioned in the embodiments of the present application can be realized by pre-saving the corresponding code, table or other means that can be used to indicate the relevant information in the device (for example, including terminal device and network device), and the specific implementation manner is not limited in the present application. For example, the predefined can mean the definition in the protocol. It should also be understood that the "protocol" in the embodiments of the present application can mean the standard protocol in the communication field, for example, it can include the LTE protocol, the NR protocol and the related protocol applied to the future communication system, which is not limited in the present application.

[0059] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described as follows. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any way, and all of them belong to the protection scope of the embodiments of the present application.

[0060] In existing NR system, each serving cell can be configured with one cell DTX pattern (including active time and non-active time) by Radio Resource Control (RRC). Cell DTX impacts the Physical Downlink Control Channel (PDCCH) monitoring activity and Semi-Static Scheduling (SPS)-PDSCH of connected UEs. For all serving cells configured and activated with cell DTX, UE can monitor PDCCH and receive SPS-PDSCH based on cell DTX.

[0061] For one serving cell, if cell DTX is configured and activated, the cell DTX active time includes:

[0062] 1. For the associated serving cell, timer celldtxdrx-onDurationTimer is running.

[0063] 2. For each serving cell configured with cell DTX, UE shall:

[0064] 2.1. For this serving cell, if cell DTX is activated:

[0065] If [(SFN*10) + subframe number] mod (cell DTX period) = subframe where cell DTX starts, start timer celldtxdrx-onDurationTimer at the celldtxdrx-SlotOffsetth time slot after this subframe.

[0066] 2.2. For this serving cell, if cell DTX is deactivated, or, if this serving cell is in cell DTX active time:

[0067] Monitor PDCCH on this serving cell.

[0068] 2.3, if a retransmission timer is running on any serving cell in the DRX group that the serving cell belongs to, or, if a contention resolution timer or a time window for monitoring a random access response (RAR) in 2-step random access is running, or, if a scheduling request (SR) is sent on a physical uplink control channel (PUCCH) and is in a pending state, or, for contention-based random access procedure, after successfully receiving a random access response (RAR), a PDCCH scrambled with a cell-radio network temporary identifier (C-RNTI) for scheduling a new transmission is not received:

[0069] monitor PDCCH on serving cells in the DRX group that the serving cell belongs to.

[0070] 2.4, if the RAR window is running and the serving cell is a special cell:

[0071] monitor PDCCH on the serving cell.

[0072] 3, for each serving cell configured with cell DTX, the UE does not need to:

[0073] 3.1, if cell DTX is activated and the serving cell is not in the cell DTX activation time:

[0074] monitor PDCCH corresponding to RNTIs affected by terminal device DRX; indicate that the physical layer receives SPS-PDSCH.

[0075] Each serving cell can be configured with one cell DRX pattern (i.e. activation and non-activation time) by RRC. Cell DRX controls scheduling request (SR) and configured grant (CG)-physical uplink shared channel (PUSCH) of the connected state UE. For all serving cells configured and activated with cell DRX, the UE can send CG-PUSCH and SR based on cell DRX.

[0076] For one serving cell, if cell DRX is configured and activated, the cell DRX activation time includes:

[0077] 1. For the associated serving cell, the timer celldtxdrx-onDurationTimer is running.

[0078] 2. For each serving cell configured with cell DRX, the UE shall:

[0079] 2.1. For this serving cell, if cell DRX is activated:

[0080] If [(SFN*10) + subframe number] mod (cell DRX cycle) = subframe where cell DRX starts, start the timer celldtxdrx-onDurationTimer at the celldtxdrx-SlotOffsetth time slot after this subframe.

[0081] 2.2. If cell DRX is activated and this serving cell is not in cell DRX active time:

[0082] Do not indicate the physical layer to transmit SR on PUCCH;

[0083] Do not transmit CG-PUSCH;

[0084] Do not report Channel State Information (CSI) on PUCCH and semi-persistent CSI configured on PUSCH;

[0085] If emergency service is initiated by higher layers and this serving cell is a special cell, initiate the random access procedure.

[0086] Currently, two random access modes are mainly supported, which are a contention-based random access mode and a non-contention-based random access mode.

[0087] FIG. 2 is a schematic diagram of a contention-based random access procedure provided by an embodiment of the present application. As shown in FIG. 2, the contention-based random access procedure can include the following steps:

[0088] S201. The terminal device sends Msg1 to the network device.

[0089] Msg1 includes a random access preamble (RAP), or a preamble.

[0090] The terminal device can select a physical random access channel (PRACH) resource, and send the selected preamble on the selected PRACH. The network device can estimate the uplink timing (Timing) and the grant size required for the terminal device to transmit Msg3 based on the preamble.

[0091] S202, the network device sends Msg2 to the terminal device.

[0092] Msg2 includes a random access response RAR.

[0093] After the terminal device sends Msg1, a random access response time window (ra-ResponseWindow) can be started, and a PDCCH scrambled by a random access-radio network temporary identifier (RA-RNTI) is monitored in the random access response time window. In LTE, the calculation formula of the RA-RNTI is shown in formula (1):

[0094] wherein t_id (0≤t_id<10) is the index of the first subframe of the PRACH transmission, and f_id (0≤f_id<6) is the frequency domain index corresponding to the PRACH on the subframe, wherein the PRACH resources are sequentially numbered in the frequency domain in the order from low to high.

[0095] For an enhanced machine type communication (eMTC) terminal device, the calculation formula of the RA-RNTI is shown in formula (2):

[0096] wherein t_id (0≤t_id<10) is the index of the first subframe of the PRACH transmission, and f_id (0≤f_id<6) is the frequency domain index corresponding to the PRACH on the subframe, wherein the PRACH resources are sequentially numbered in the frequency domain in the order from low to high. SFN_id is the index of the first system frame number (SFN) of the PRACH transmission, and Wmax is the maximum RAR window length that can be supported by the eMTC, and the value is 400 subframes.

[0097] For a narrow band internet of things (NB-IoT) terminal device, the calculation formula of the RA-RNTI is shown in formula (3):

[0098] Wherein, SFN_id is the index of the first SFN of the PRACH transmission, carrier_id is the index of the UL carrier corresponding to the PRACH transmission. The carrier_id corresponding to the anchor carrier is 0.

[0099] For the NB-IoT terminal device in the Time Division Duplexing (TDD) mode, the calculation formula of the RA-RNTI is shown in formula (4): RA-RNTI = 1 + floor(SFN_id / 4) + 256*(H-SFN mod 2) (4);

[0100] Wherein, SFN_id is the index of the first SFN of the PRACH transmission, H-SFN is the first Hyper System Frame Number (H-SFN) of the PRACH transmission.

[0101] It can be seen from the above calculation formula of the RA-RNTI that the RA-RNTI is related to the PRACH time-frequency resource used by the terminal device to send the Msg1.

[0102] After the terminal device successfully receives the PDCCH scrambled by the RA-RNTI, the terminal device can obtain the PDSCH scheduled by the PDCCH, which contains the RAR. The RAR specifically contains the following information:

[0103] The Backoff Indicator (BI) in the subheader of the RAR is used to indicate the backoff time of retransmitting the Msg1;

[0104] The Random Access Preamble Identity (RAPID) in the RAR is the preamble index received by the network in response;

[0105] The TAG in the payload of the RAR is used to adjust the uplink timing;

[0106] The uplink grant (UL grant) is used to indicate the uplink resource of the Msg3;

[0107] The Temporary C-RNTI (TC-RNTI) is used to scramble the PDCCH of the Msg4 (initial access).

[0108] If the terminal device receives the PDCCH scrambled by the RA-RNTI and the RAR contains the preamble index sent by itself, the terminal device considers that the random access response is successfully received.

[0109] For non-contention based random access, the random access procedure ends after the terminal device successfully receives Msg2. For contention based random access, the terminal device needs to continue transmitting Msg3 and receiving Msg4 after successfully receiving Msg2.

[0110] S203, the terminal device sends Msg3 (Scheduled Transmission) to the network device.

[0111] The terminal device can transmit Msg3 on the resource scheduled by the network device. Msg3 is mainly used to inform the network device that the random access procedure is triggered by what event. For example, if it is an initial access random procedure, the terminal device identifier (ID) and establishment cause will be carried in Msg3; if it is RRC reestablishment, the connected terminal device identifier and establishment cause will be carried.

[0112] S204, the network device sends Msg4 (Contention Resolution) to the terminal device.

[0113] Msg4 has two functions, one is used for contention conflict resolution, and the second is that the network device transmits an RRC configuration message to the terminal device. There are two ways for contention conflict resolution: one is that if the terminal device carries a cell radio network temporary identifier (C-RNTI) in Msg3, Msg4 is scheduled by PDCCH scrambled with C-RNTI. The other is that if the terminal device does not carry C-RNTI in Msg3, such as initial access, Msg4 is scheduled by PDCCH scrambled with TC-RNTI, and the solution to the conflict is that the terminal device receives the PDSCH of Msg4 to achieve it through matching the common control channel service data unit (CCCH SDU) in the PDSCH.

[0114] Fig. 3 is a schematic diagram of a non-contention based random access procedure provided by an embodiment of the present application. As shown in Fig. 3, the non-contention based random access procedure can include the following steps:

[0115] S301, the network device sends a random access preamble assignment (RA Preamble assignment) message to the terminal device.

[0116] S302, the terminal device sends Msg1 to the network device.

[0117] The Msg1 includes a random access preamble, or a preamble. The terminal device can send a preamble specified by the network device on the PRACH resource specified by the network device. The network device can estimate the uplink timing (Timing) and the grant size required by the terminal device to transmit Msg3 based on the preamble.

[0118] S303, the network device sends Msg2 to the terminal device.

[0119] This step can refer to the foregoing step S202, which will not be described here.

[0120] The random access procedure of the existing NR system is not affected by the cell DTX / DRX, that is, during the non-activation time of the cell DTX / DRX, the terminal device can still receive or send the channel related to the random access procedure. However, considering that in some scenarios, during the non-activation time of the cell DTX / DRX, the terminal device cannot receive or send any channel, for example, for the cell DTX / DRX using the beam hopping of the NTN scenario, the area where the terminal device is located only exists satellite signal coverage during the activation time of the cell DTX / DRX, and cannot receive or send the channel to the satellite during the non-activation time of the cell DTX / DRX. For the cell DTX / DRX that cannot receive or send the channel during the non-activation time described above, how to complete the random access procedure is a problem to be solved.

[0121] Therefore, the embodiments of the present application provide a random access method, and the terminal device can perform the random access procedure based on the cell DRX and / or the cell DTX, that is, the terminal device can determine the valid random access resource during the activation time of the cell DRX and / or the cell DTX, and then complete the random access procedure based on the valid random access resource, so that the random access procedure of the terminal device can be flexibly implemented.

[0122] In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0123] FIG. 4 shows a random access method provided by an embodiment of the present application, which can include:

[0124] S400, the terminal device performs a random access procedure based on the cell discontinuous reception DRX and / or the cell discontinuous transmission DTX.

[0125] In this embodiment, the terminal device performs a random access procedure based on the cell discontinuous reception DRX and / or the cell discontinuous transmission DTX.

[0126] It should be understood that the cell DRX at least includes an active time of the cell DRX and an inactive time of the cell DRX, and the cell DTX at least includes an active time of the cell DTX and an inactive time of the cell DTX, so that the terminal device can perform the random access procedure based on one or more of the active time of the cell DRX, the inactive time of the cell DRX, the active time of the cell DTX, and the inactive time of the cell DTX.

[0127] It should be understood that the network device previously sends the second information to the terminal device in a broadcast / multicast manner, and the second information is used to configure the cell DRX and the cell DTX.

[0128] In some embodiments, the terminal device sends a physical random access channel (PRACH) to the network device at a first random access occasion (RO); the first RO is related to the active time of the cell DRX.

[0129] In some embodiments, the terminal device determines a first random access occasion (RO) based on the active time of the cell DRX, and sends a PRACH to the network device at the first RO to trigger the random access procedure.

[0130] In some embodiments, the first RO is located within the active time of the cell DRX.

[0131] It should be understood that the RO located within the active time of the cell DRX is a valid RO, that is, the first RO, and / or the RO located outside the active time of the cell DRX is an invalid RO, and the terminal device only sends the PRACH to the network device at the valid RO, that is, the first RO.

[0132] For example, referring to FIG. 5, if the cell DRX cycle is 160 ms, wherein the active time of the cell DRX is the first 20 ms in every 160 ms, and the RO cycle is configured as 80 ms, it can be seen that in FIG. 5, only RO#0 and RO#2 of RO#0, RO#1, RO#2 and RO#3 are located within the active time of the cell DRX, and the remaining RO#1 and RO#3 are located outside the active time of the cell DRX, at this time, RO#0 and RO#2 are valid ROs, that is, the first RO, and RO#1 and RO#3 are invalid ROs, since the terminal device only sends the PRACH to the network device at the valid RO, therefore, the terminal device can send the PRACH to the network device at RO#0 and / or RO#2.

[0133] In some embodiments, the terminal device receives first information; the first information is used to configure one or more of the following: an RO cycle; a first frame offset value.

[0134] In some embodiments, the terminal device receives first information issued by the network device, and the first information provides at least one of the following: an RO period; a first frame offset value; thus, the terminal device can determine the time domain position of the RO based on the RO period and the first frame offset value.

[0135] It should be understood that the terminal device can determine the time domain position of the RO in each RO period according to the RO period and the first frame offset value. In the prior art, the terminal device determines the time domain position of the RO from the predefined candidate time domain positions according to the PRACH configuration index provided by the network device. However, considering that the predefined candidate RO time domain positions are limited, the present application can configure the time domain position of the RO on any frame in the RO period based on the RO period and / or the first frame offset value.

[0136] In some embodiments, the first frame offset value is any one of the following: a frame offset value in the RO period; a frame offset value relative to a predefined RO.

[0137] In an example, the first frame offset value is a frame offset value in the RO period; if the RO period is T and the first frame offset value is x, the terminal device determines the index n of the frame where the RO is located f It is required to satisfy formula (5): (n f -x) mod T=0 (5);

[0138] In another example, the first frame offset value is a frame offset value relative to a predefined RO; if the RO period is T, the first frame offset value is x, and the index of the predefined candidate RO frame is x0, the terminal device determines the index n of the frame where the RO is located f It is required to satisfy formula (6): (n f -x-x0) mod T=0 (6);

[0139] Thus, the time domain position of the RO can be configured on any frame in the RO period, thereby providing the terminal device with more flexible RO time domain positions to match different cell DRX configurations, and thus enabling the random access process of the terminal device to be more flexible.

[0140] In the embodiments of the present application, for each first RO, the network device provides the terminal device with N synchronization broadcast blocks (SS / PBCH Block, SSB), if N is less than 1, 1 SSB is mapped to consecutive first ROs, and if N is greater than or equal to 1, consecutive N SSBs are mapped to one first RO.

[0141] In some embodiments, the network device pre-configures the terminal device to transmit N SSBs, the terminal device can select a first SSB with the best measurement result from the N SSBs, and select a first RO from one or more ROs associated with the first SSB and located within the active time of the cell DRX, for transmitting a PRACH to the network device on the first RO.

[0142] In some embodiments, the terminal device transmits a first physical uplink shared channel (PUSCH) to the network device at a first PUSCH occasion, the first PUSCH occasion is related to the active time of the cell DRX, and the first PUSCH occasion is after the first RO.

[0143] In some embodiments, for a 2-step random access procedure, after the terminal device transmits the PRACH to the network device on the first RO, the terminal device needs to determine a first PUSCH occasion based on the active time of the cell DRX, and then transmits a first PUSCH to the network device at the first PUSCH occasion.

[0144] In some embodiments, the first PUSCH occasion is within the active time of the cell DRX.

[0145] It should be understood that the PUSCH occasion within the active time of the cell DRX is a valid PUSCH occasion, that is, the first PUSCH occasion, and / or the PUSCH occasion outside the active time of the cell DRX is an invalid PUSCH occasion, and the terminal device only transmits the first PUSCH to the network device at the valid PUSCH occasion, that is, the first PUSCH occasion.

[0146] In some embodiments, the first information issued by the network device can also provide a PUSCH occasion period. Similar to the above-mentioned embodiments for determining the first RO, the terminal device can also determine a valid PUSCH occasion, that is, the first PUSCH occasion, based on the PUSCH occasion period and the active time of the cell DRX, and then transmit the first PUSCH to the network device at the first PUSCH occasion.

[0147] In summary, the terminal device can determine a valid RO and a valid PUSCH occasion based on the active time of the cell DRX, so as to ensure that the terminal device can transmit the PRACH or the PRACH and the PUSCH to the network device on the valid random access resource.

[0148] In some embodiments, the terminal device monitors a random access response (RAR) message in a first time window starting from a first time domain unit, and the first time domain unit is related to the active time of the cell DTX.

[0149] In some embodiments, the first time window is a RAR window, and the terminal device attempts to detect a DCI 1_0 scrambled with a RA-RNTI within the RAR window in response to the PRACH transmission, and the terminal device can receive the RAR message by monitoring the DCI 1_0 within the RAR window, since the RAR message is scheduled by the DCI 1_0, and a starting moment of the RAR window, i.e., the first time domain unit, is determined based on the activation time of the cell DTX.

[0150] In some embodiments, the first time domain unit is located after a second time domain unit, and the second time domain unit corresponds to a last symbol of the PRACH or a last symbol of the first PUSCH; and the first time domain unit is different from the second time domain unit by a first time length.

[0151] In some embodiments, the terminal device starts the first time window, i.e., the RAR window, at the first time domain unit after a lapse of the first time length after the terminal device transmits the last symbol of the PRACH to the network device on the first RO.

[0152] In some embodiments, for 2-step random access, the terminal device starts the first time window, i.e., the RAR window, at the first time domain unit after a lapse of the first time length after the terminal device transmits the last symbol of the first PUSCH to the network device at the first PUSCH occasion.

[0153] In some embodiments, the first time domain unit corresponds to a first symbol of a first control resource set CORESET; the first CORESET is used to carry a first candidate physical downlink control channel PDCCH; the first candidate PDCCH is a first candidate PDCCH in a first PDCCH search space set located within the activation time of the DTX; and the first PDCCH search space set is a search space set of a PDCCH used to receive a PDCCH scheduling the RAR message.

[0154] In some embodiments, the first time length is 0 or is determined based on a round trip time (RTT) between the terminal device and the network device.

[0155] In some embodiments, the first time length is 0, and the terminal device starts the first time window at a first symbol of a first control resource set CORESET in a first PDCCH search space (Type1-PDCCH CSS) set configured to be received by the terminal device after the terminal device transmits the last symbol of the PRACH to the network device on the first RO, and the first symbol is located within the activation time of the DTX.

[0156] In an example, referring to FIG. 6, PDCCH#2 of PDCCH#1 and PDCCH#2 is the first PDCCH located in the activation time of DTX, that is, PDCCH#2 is the first candidate PDCCH, at this time, the terminal device can start the RAR window at the first symbol of the CORESET where PDCCH#2 is located.

[0157] In some embodiments, the scheme can be applied in a non-terrestrial network (NTN). In the NTN scenario, considering the influence of NTN propagation delay, the first time length is not 0, the first time length is determined based on the RTT between the terminal device and the network device, and after the terminal device transmits the last symbol of the PRACH on the first RO to the network device, the first time window is started at the first symbol of the first control resource set CORESET where the first candidate PDCCH located in the activation time of DTX in the first PDCCH search space (Type1-PDCCH CSS) set configured for the terminal device.

[0158] In an example, in the NTN scenario, if or is not equal to 0, considering the influence of NTN propagation delay, the first time window can be started after T TA +k mac ms (first time length), wherein, is the timing advance (TA) calculated by the terminal device based on the satellite position and the position of the terminal device, is the common TA determined based on the uplink synchronization reference point and the satellite position, T TA is the total TA after considering and , k mac is greater than or equal to the RTT between the reference point and the network device, referring to FIG. 7, T TA +k mac ms (first time length) can cover the RTT between the terminal device and the network device in the NTN scenario, and the starting time of the first time window without considering the DTX activation time is as shown in FIG. 8, that is, after the terminal device transmits the last symbol of the PRACH on the configured RO (first RO) to the network device, T TA +k mac ms (first time length) is passed, the RAR window is started at the first symbol of the first control resource set CORESET where the first candidate PDCCH located in the activation time of DTX in the first PDCCH search space (Type1-PDCCH CSS) set configured for the terminal device.

[0159] Thus, in the NTN scenario, the first candidate PDCCH is the first candidate PDCCH in the Type1-PDCCH CSS set within the DTX activation time, considering the DTX activation time.

[0160] For an example, referring to FIG. 9, since the cell DTX is aligned with the cell DRX at the network device side, assuming that the reference point is at the network device, when k mac = 0, the first time duration of the terminal device and the network device only needs to consider T TA Thus, the terminal device starts the RAR window at the first symbol of the CORESET where the PDCCH#2 is located within the activation time of the cell DTX.

[0161] In some embodiments, for the 2-step random access, the terminal device starts the RAR window at the first symbol of the CORESET where the first candidate PDCCH in the first PDCCH search space (Type1-PDCCH CSS) set within the DTX activation time after the first time duration after the terminal device transmits the last symbol of the first PUSCH to the network device; wherein the first time duration can be 0 or determined based on the RTT between the terminal device and the network device.

[0162] In some embodiments, the first time window runs within the activation time of the cell DTX and / or the first time window does not run outside the activation time of the cell DTX.

[0163] It should be understood that considering that the network device can only send the RAR message within the activation time of the cell DTX when sending the RAR message to the terminal device, based on this, the first time window for detecting the RAR message only runs within the activation time of the cell DTX and / or the first time window suspends running outside the activation time of the cell DTX.

[0164] For an example, referring to FIG. 10, the RAR window partially overlaps with the activation time of the cell DTX, so the RAR window suspends running at the end of the first activation time of the cell DTX and continues running when the second activation time of the cell DTX comes, thereby avoiding unnecessary listening activities of the terminal device outside the activation time of the cell DTX, wherein the RAR window can start at the first symbol of the CORESET where the first candidate PDCCH within the current activation time of the cell DTX is located when the second activation time of the cell DTX comes, or the RAR window can be directly started when the second activation time of the cell DTX comes without waiting for the first candidate PDCCH.

[0165] In some embodiments, the terminal device transmits the second PUSCH on a third time domain unit; the third time domain unit is related to an active time of the cell DRX, and the second PUSCH is used to carry a random access message 3.

[0166] In some embodiments, the terminal device determines the third time domain unit according to the active time of the cell DRX, and transmits the second PUSCH used to carry the Msg3 to the network device on the third time domain unit.

[0167] It should be understood that, after the terminal device detects the DCI 1_0 scrambled with the RA-RNTI based on the RAR window, the terminal device needs to transmit the second PUSCH used to carry the Msg3 to the network device after receiving the RAR message, and thus, after the terminal device detects the DCI 1_0 scrambled with the RA-RNTI within the RAR window, the terminal device determines the third time domain unit according to the active time of the cell DRX, and then transmits the second PUSCH used to carry the Msg3 to the network device on the third time domain unit.

[0168] In some embodiments, the third time domain unit is located after the fourth time domain unit, the third time domain unit is spaced from the fourth time domain unit by a first number of time domain units, and the fourth time domain unit is a time domain unit at which the terminal device receives the RAR message or a time domain unit at which the first downlink control information DCI scheduling the second PUSCH is received.

[0169] In some embodiments, the terminal device transmits the second PUSCH used to carry the Msg3 to the network device on the third time domain unit after the fourth time domain unit at which the terminal device receives the RAR message and after the first number of time domain units.

[0170] In some embodiments, if the terminal device fails to transmit the Msg3 for the first time, the terminal device needs to schedule the first DCI scheduling the second PUSCH for retransmitting the Msg3, and at this time, the terminal device transmits the second PUSCH used to carry the random access message Msg3 to the network device on the third time domain unit after the fourth time domain unit at which the first DCI scheduling the second PUSCH is received and after the first number of time domain units.

[0171] In some embodiments, the first number is determined according to one or more of the following: a scheduling delay of the RAR uplink grant; a scheduling delay of the first DCI; a scheduling delay of a non-terrestrial network NTN scenario.

[0172] It should be understood that the first number of time domain units is a scheduling delay of the second PUSCH.

[0173] In some embodiments, the scheduling delay of the second PUSCH is determined according to the scheduling delay of the RAR uplink grant and / or the scheduling delay of the first DCI, if the Msg3 is scheduled by the RAR uplink grant in the RAR message issued by the network device, in which case the scheduling delay of the second PUSCH needs to consider the scheduling delay of the RAR uplink grant; if the Msg3 is scheduled by the first DCI issued by the network device, in which case the scheduling delay of the second PUSCH needs to consider the scheduling delay of the first DCI.

[0174] In some embodiments, the present scheme can be applied in a non-terrestrial network (NTN). In the NTN scenario, considering the influence of NTN propagation delay, the scheduling delay of the second PUSCH needs to consider not only the scheduling delay of the RAR uplink grant and / or the scheduling delay of the first DCI, but also the scheduling delay of the NTN scenario, whereby if the Msg3 is scheduled by the RAR uplink grant in the RAR message issued by the network device, in which case the scheduling delay of the second PUSCH needs to consider the scheduling delay of the RAR uplink grant and the scheduling delay of the NTN scenario; if the Msg3 is scheduled by the first DCI issued by the network device, in which case the scheduling delay of the second PUSCH needs to consider the scheduling delay of the first DCI and the scheduling delay of the NTN scenario.

[0175] For example, the first number of time domain units can be determined according to one or more of the following: the scheduling delay k2+Δ of the RAR uplink grant or the first DCI, the scheduling delay K of the NTN scenario cell,offset (in NTN scenario only); as shown in FIG. 11, the scheduling delay (first number of time domain units) of the second PUSCH is k2+Δ+K cell,offset , i.e., the terminal device receives the RAR message, and after k2+Δ+K cell,offset , the terminal device sends the second PUSCH to the network device, if k2+Δ+K cell,offset is only based on the counting of the slot index, then the scheduled second PUSCH can occur outside the active time of the cell DRX, resulting in the second PUSCH being unable to be sent, therefore, the scheduling delay k2+Δ of the RAR uplink grant or the first DCI, and / or the scheduling delay K of the NTN scenario cell,offset is only counted within the active time of the cell DRX, whereby, i.e., it is ensured that the scheduled second PUSCH is sent within the active time of the cell DRX.

[0176] In some embodiments, the first number of time domain units are all time domain units within the active time of the cell DRX.

[0177] It should be understood that when the terminal device counts the first number of time domain units backward based on the time slot position of the fourth time domain unit to determine the third time domain unit, in order to prevent the third time domain unit from falling outside the active time of the cell DRX, the terminal device only considers the time domain units located within the active time of the cell DRX when counting, so that the third time domain unit can only be a time domain unit within the active time of the cell DRX.

[0178] In some embodiments, the terminal device repeatedly transmits the second PUSCH on a plurality of third time domain units, and the plurality of third time domain units are located within the active time of the cell DRX.

[0179] An example, if the terminal is scheduled to repeatedly transmit the second PUSCH for carrying Msg3 on slots (third time domain units), the slots are only counted within the active time of the cell DRX, that is, the terminal device only performs the repeated transmission process of the second PUSCH within the active time of the cell DRX. Referring to FIG. 12, if the terminal is scheduled to repeatedly transmit the second PUSCH for carrying Msg3 on slots, the first 2 times of repeated transmission of the second PUSCH for carrying Msg3 are transmitted within the first active time of the cell DRX, and the remaining 2 times of repeated transmission of the second PUSCH for carrying Msg3 are transmitted within the second active time of the cell DRX, so as to ensure that the configured repeated transmission of the second PUSCH for carrying Msg3 can be successfully transmitted.

[0180] In some embodiments, the terminal device listens to a first PDCCH scheduling a first physical downlink shared channel (PDSCH) during a running period of a first timer, the first PDSCH is used to carry a random access message 4, and the fifth time domain unit is related to the active time of the cell DTX.

[0181] In some embodiments, the first timer is a contention resolution timer, and in response to the second PUSCH for carrying Msg3, the terminal device attempts to detect DCI 1_0 scrambled with TC-RNTI within the contention resolution timer, since the random access message Msg4 is carried by DCI 1_0, that is, the terminal device can listen to Msg4 by detecting DCI 1_0 within the running period of the contention resolution timer, and the starting time of the contention resolution timer, that is, the fifth time domain unit, is determined based on the active time of the cell DTX.

[0182] In some embodiments, the fifth time domain unit is located after the sixth time domain unit, the sixth time domain unit corresponds to a last symbol of the second PUSCH, and the fifth time domain unit is different from the sixth time domain unit by the second time length.

[0183] In some embodiments, the terminal device starts the first timer, i.e., the contention resolution timer, at the fifth time domain unit after a lapse of the second time length when the terminal device has transmitted the last symbol of the second PUSCH to the network device.

[0184] In some embodiments, the fifth time domain unit corresponds to a first symbol within an activation time of the cell DTX after a lapse of the second time length from the sixth time domain unit.

[0185] In some embodiments, the second time length is 0 or is determined based on a Round Trip Time (RTT) between the terminal device and the network device.

[0186] In some embodiments, the second time length is 0, and the terminal device starts the first timer at the first symbol within the activation time of the cell DTX immediately after the terminal device has transmitted the last symbol of the second PUSCH to the network device.

[0187] For example, referring to FIG. 13, the terminal device starts the contention resolution timer at the first symbol within the activation time of the cell DTX after the terminal device has transmitted the last symbol of the second PUSCH to the network device.

[0188] In some embodiments, the present scheme can be applied in a Non-Terrestrial Network (NTN). In the NTN scenario, considering the influence of NTN propagation delay, the second time length is not 0, and the second time length is determined based on an RTT between the terminal device and the network device, i.e., the terminal device starts the first timer at the first symbol within the activation time of the cell DTX after the network device has transmitted the last symbol of the second PUSCH and a lapse of the second time length.

[0189] For example, referring to FIG. 14, the terminal device transmits the last symbol of the second PUSCH to the network device at the end of the activation time of the first cell DRX. After considering the RTT, the terminal device needs to start the contention resolution timer at the first symbol within the activation time of the cell DTX after a lapse of the second time length, i.e., the terminal device needs to start the contention resolution timer at the start of the activation time of the second cell DTX, so as to avoid unnecessary listening activities of the terminal device outside the activation time of the DTX.

[0190] In some embodiments, the first timer runs in the active time of the cell DTX, and / or the first timer does not run outside the active time of the cell DTX.

[0191] It should be understood that, considering that the network device can only transmit in the active time of the cell DTX when transmitting the Msg4 to the terminal device, based on this, the first timer for detecting the Msg4 only runs in the active time of the cell DTX, and / or the first timer does not run outside the active time of the cell DTX.

[0192] For example, referring to FIG. 15, the contention resolution timer partially coincides with the active time of the cell DTX, so that the contention resolution timer is paused at the end of the first active time of the cell DTX, and continues to run when the second active time of the cell DTX comes, thereby avoiding unnecessary listening activities of the terminal device outside the active time of the cell DTX.

[0193] In some embodiments, the terminal device transmits a first physical uplink control channel (PUCCH) corresponding to the first PDSCH on a seventh time domain unit, the seventh time domain unit is related to the active time of the cell DRX, and the first PUCCH is used to carry an acknowledgement message corresponding to the first PDSCH.

[0194] In some embodiments, the terminal device determines the seventh time domain unit according to the active time of the cell DRX, and then transmits a first PUCCH used to carry an acknowledgement message corresponding to the first PDSCH to the network device on the seventh time domain unit.

[0195] It should be understood that, after detecting the DCI 1_0 scrambled with the TC-RNTI based on the contention resolution timer, the terminal device needs to transmit a first PUCCH corresponding to the first PDSCH to the network device, and the first PUCCH is used to carry an acknowledgement message corresponding to the first PDSCH, so that, after detecting the DCI 1_0 scrambled with the TC-RNTI in the contention resolution timer, the terminal device determines a seventh time domain unit according to the active time of the cell DRX, and then transmits a first PUCCH used to carry an acknowledgement message corresponding to the first PDSCH to the network device on the seventh time domain unit.

[0196] In some embodiments, the seventh time domain unit is located after an eighth time domain unit, the seventh time domain unit is spaced apart from the eighth time domain unit by a second number of time domain units, and the eighth time domain unit is a time domain unit in which the terminal device receives the first PDSCH.

[0197] In some embodiments, the terminal device transmits, to the network device, the first PUCCH carrying the acknowledgement message corresponding to the first PDSCH on the seventh time domain unit after the eighth time domain unit of the first PDSCH transmitted by the network device and a second number of time domain units.

[0198] In some embodiments, the second number of time domain units is determined according to one or more of the following: a scheduling delay between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH; a scheduling delay of the NTN scenario.

[0199] It should be understood that the second number of time domain units is a scheduling delay of the first PUCCH.

[0200] In some embodiments, the scheduling delay of the first PUCCH is determined according to a scheduling delay between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH.

[0201] In some embodiments, the present solution can be applied in the NTN scenario. In the NTN scenario, considering the influence of the NTN propagation delay, the scheduling delay of the first PUCCH needs to consider not only the scheduling delay between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH, but also the scheduling delay of the NTN scenario. Therefore, the scheduling delay of the first PUCCH is determined according to the scheduling delay between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH, and the scheduling delay of the NTN scenario.

[0202] For example, the second number of time domain units can be determined according to one or more of the following: a scheduling delay k between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH, a scheduling delay K of the NTN scenario. offset (in the NTN scenario only); referring to FIG. 16, the scheduling delay (the second number of time domain units) of the first PUCCH is k+K offset , i.e., the terminal device transmits the first PUCCH to the network device after receiving the first PDSCH and k+K offset , if k+K offset Based only on the counting of the slot index, the scheduled first PUCCH can occur outside the active time of the cell DRX, resulting in the first PUCCH being unable to be transmitted. Therefore, the scheduling delay k between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH, and / or the scheduling delay K of the NTN scenario need to be considered. offset Only the counting within the active time of the cell DRX is counted, i.e., it is ensured that the scheduled first PUCCH is transmitted within the active time of the cell DRX.

[0203] In some embodiments, the second number of time domain units are each a time domain unit within the active time of the cell DRX.

[0204] It should be understood that when the terminal device counts back the second number of time domain units from the slot position based on the eighth time domain unit to determine the seventh time domain unit, in order to prevent the seventh time domain unit from falling outside the active time of the cell DRX, the terminal device only considers the time domain units located within the active time of the cell DRX when counting, and thus the seventh time domain unit can only be a time domain unit within the active time of the cell DRX.

[0205] In some embodiments, the terminal device repeatedly transmits the first PUCCH on a plurality of seventh time domain units, and the plurality of seventh time domain units are located within the active time of the cell DRX.

[0206] An example, if the terminal is scheduled to repeatedly transmit the first PUCCH for carrying the acknowledgement message corresponding to the first PDSCH on slots (seventh time domain units), the slots are only counted within the active time of the cell DRX, that is, the terminal device only performs the repeated transmission process of the first PUCCH within the active time of the cell DRX. Referring to FIG. 16, if the terminal is scheduled to repeatedly transmit the first PUCCH for carrying the acknowledgement message corresponding to the first PDSCH on slots, the first 2 repeated transmissions of the first PUCCH for carrying the acknowledgement message corresponding to the first PDSCH are transmitted within the first active time of the cell DRX, and the remaining 2 repeated transmissions of the first PUCCH for carrying the acknowledgement message corresponding to the first PDSCH are transmitted within the second active time of the cell DRX, so as to ensure that the configured repeated transmissions of the first PUCCH for carrying the acknowledgement message corresponding to the first PDSCH can be successfully transmitted.

[0207] In some embodiments, the first time length or the second time length is 0, or the first time length or the second time length is determined according to the round trip time RTT between the terminal device and the network device.

[0208] In some embodiments, the first time length is applied to the scenario of determining the first time domain unit in the above-mentioned embodiments, and when the NTN scenario is not considered, the first time length is 0, that is, after the terminal device transmits the last symbol of the PRACH on the first RO, or after the terminal device transmits the last symbol of the first PUSCH on the first PUSCH occasion (2-step random access), the first symbol of the first CORESET where the first candidate PDCCH located within the active time of the DTX is located in the Type1-PDCCH CSS set starts the first time window.

[0209] In some embodiments, the first time duration is applied to the scenario of determining the first time domain unit in the above embodiments, and the first time duration is determined based on the RTT between the terminal device and the network device when the NTN scenario is considered, that is, after the terminal device transmits the last symbol of the PRACH on the first RO to the network device, or after the terminal device transmits the last symbol of the first PUSCH on the first PUSCH occasion (2-step random access), the first symbol of the first CORESET where the first candidate PDCCH of the Type1-PDCCH CSS set located in the activation time of the DTX starts the first time window after the first time duration.

[0210] In some embodiments, the second time duration is applied to the scenario of determining the fifth time domain unit in the above embodiments, and the second time duration is 0 when the NTN scenario is not considered, that is, after the terminal device transmits the last symbol of the second PUSCH to the network device, the first symbol located in the activation time of the cell DTX starts the first timer.

[0211] In some embodiments, the second time duration is applied to the scenario of determining the fifth time domain unit in the above embodiments, and the second time duration is determined based on the RTT between the terminal device and the network device when the NTN scenario is considered, that is, after the network device transmits the last symbol of the second PUSCH and the second time duration elapses, the first symbol located in the activation time of the cell DTX starts the first timer.

[0212] In some embodiments, the time domain unit can be a slot or a symbol.

[0213] In some embodiments, the time domain unit in the first time domain unit and the second time domain unit can be a symbol; when the terminal device determines the first time domain unit, the first time domain unit is the first symbol of the first control resource set CORESET where the first candidate PDCCH of the Type1-PDCCH CSS set located in the activation time of the DTX, and thus the first time domain unit can be the first symbol; at the same time, the second time domain unit corresponds to the last symbol of the PRACH or the last symbol of the first PUSCH, and thus the second time domain unit can be the second symbol.

[0214] In some embodiments, the time domain unit in the third time domain unit and the fourth time domain unit can be a time slot; the terminal device sends the second PUSCH for carrying the Msg3 to the network device in the third time domain unit, that is, the terminal device sends the second PUSCH for carrying the Msg3 to the network device in the third time slot; at the same time, the fourth time domain unit is the time domain unit in which the terminal device receives the RAR message or the time domain unit of the first DCI scheduling the second PUSCH, that is, the terminal device receives the RAR message in the fourth time slot or the first DCI scheduling the second PUSCH.

[0215] In some embodiments, the time domain unit in the fifth time domain unit and the sixth time domain unit can be a symbol; when the terminal device determines the fifth time domain unit, since the fifth time domain unit is the first symbol located in the active time of the cell DTX, the fifth time domain unit can be the fifth symbol; at the same time, the sixth time domain unit corresponds to the last symbol of the second PUSCH, so the second time domain unit can be the sixth symbol.

[0216] In some embodiments, the time domain unit in the seventh time domain unit and the eighth time domain unit can be a time slot; the terminal device sends the first PUCCH for carrying the confirmation message corresponding to the first PDSCH to the network device in the seventh time domain unit, that is, the terminal device sends the first PUCCH for carrying the confirmation message corresponding to the first PDSCH to the network device in the seventh time slot; at the same time, the eighth time domain unit is the time domain unit in which the terminal device receives the first PDSCH, that is, the terminal device receives the first PDSCH in the eighth time slot.

[0217] In summary, according to the random access method of the embodiment of the application, the terminal device can perform the random access process based on the cell DRX and / or the cell DTX, that is, the terminal device can determine the valid random access resource in the active time of the cell DRX and / or the cell DTX, and then complete the random access process based on the valid random access resource, so that the random access process of the terminal device can be flexibly realized.

[0218] The random access method of the embodiment of the application is described in detail from the perspective of the terminal device in combination with FIG. 2, and the random access method of the embodiment of the application is described in detail from the perspective of the network device in combination with FIG. 18. It should be understood that the steps performed by the network device correspond to the steps performed by the terminal device. For brevity, the repeated description is appropriately omitted in the following.

[0219] FIG. 18 shows a random access method provided by an embodiment of the application, which can include:

[0220] S1800. The network device sends second information; the second information is used to configure cell DRX and / or cell DTX, and the cell DRX and / or cell DTX are used for the terminal device to perform a random access procedure.

[0221] In this embodiment, the network device sends second information; the second information is used to configure cell DRX and / or cell DTX, and the cell DRX and / or cell DTX are used for the terminal device to perform a random access procedure.

[0222] It should be understood that the cell DRX at least includes an active time of the cell DRX and an inactive time of the cell DRX, and the cell DTX at least includes an active time of the cell DTX and an inactive time of the cell DTX, so that the terminal device can perform a random access procedure based on one or more of the active time of the cell DRX, the inactive time of the cell DRX, the active time of the cell DTX, and the inactive time of the cell DTX.

[0223] In some embodiments, the network device receives a PRACH; the PRACH is sent by the terminal device on a first RO; the first RO is related to the active time of the cell DRX.

[0224] In some embodiments, the terminal device determines the first RO based on the active time of the cell DRX, and sends a PRACH to the network device on the first RO to trigger a random access procedure.

[0225] In some embodiments, the first RO is located within the active time of the cell DRX.

[0226] In some embodiments, the terminal device receives first information; the first information is used to configure one or more of the following: an RO period; a first frame offset value.

[0227] In some embodiments, the terminal device receives the first information issued by the network device, and the first information provides at least one of the following: an RO period; a first frame offset value; thereby the terminal device can determine the RO based on the RO period and the first frame offset value.

[0228] In some embodiments, the first RO is determined according to the RO period and the first frame offset value.

[0229] In some embodiments, the first frame offset value is any one of the following: a frame offset value within the RO period; a frame offset value relative to a predefined RO.

[0230] In some embodiments, the network device receives a first PUSCH; the first PUSCH is sent by the terminal device on a first PUSCH occasion; the first PUSCH occasion is related to the active time of the cell DRX; and the first PUSCH occasion is after the first RO.

[0231] In some embodiments, for the 2-step random access procedure, after the terminal device sends the PRACH to the network device on the first RO, the terminal device further needs to determine a first PUSCH occasion based on the active time of the cell DRX, and then send the first PUSCH to the network device on the first PUSCH occasion.

[0232] In some embodiments, the first PUSCH occasion is located within the active time of the cell DRX.

[0233] In some embodiments, the network device sends the RAR message to the terminal device within a first time window.

[0234] In some embodiments, the network device sends the RAR message to the terminal device after receiving the PRACH or the first PUSCH sent by the terminal device.

[0235] In some embodiments, the terminal device monitors the RAR message within a first time window starting from a first time domain unit; the first time domain unit is related to the active time of the cell DTX.

[0236] In some embodiments, the first time window runs within the active time of the cell DTX, and / or the first time window does not run outside the active time of the cell DTX.

[0237] In some embodiments, the first time domain unit is located after a second time domain unit, the second time domain unit corresponds to the last symbol of the PRACH or the last symbol of the first PUSCH; the first time domain unit is different from the second time domain unit by a first time length.

[0238] In some embodiments, the first time domain unit corresponds to the first symbol of a first control resource set CORESET; the first CORESET is used to carry a first candidate physical downlink control channel PDCCH; the first candidate PDCCH is the first candidate PDCCH in a first PDCCH search space set located within the active time of the DTX; the first PDCCH search space set is a search space set for receiving a PDCCH scheduling the RAR message.

[0239] In some embodiments, the network device receives a second PUSCH; the second PUSCH is sent by the terminal device on a third time domain unit; the third time domain unit is related to the active time of the cell DRX, and the second PUSCH is used to carry a random access message 3.

[0240] In some embodiments, the terminal device sends a second PUSCH on a third time domain unit; the third time domain unit is related to the active time of the cell DRX, and the second PUSCH is used to carry a random access message 3.

[0241] In some embodiments, the terminal device detects the DCI 1_0 scrambled with the RA-RNTI based on the RAR window, so that after detecting the RAR message, the terminal device needs to send the second PUSCH for carrying the Msg3 to the network device, thereby, after detecting the DCI 1_0 scrambled with the RA-RNTI in the RAR window, the terminal device determines a third time domain unit according to the active time of the cell DRX, and then sends the second PUSCH for carrying the Msg3 to the network device on the third time domain unit.

[0242] In some embodiments, the third time domain unit is located after the fourth time domain unit, the third time domain unit is spaced from the fourth time domain unit by a first number of time domain units, and the fourth time domain unit is a time domain unit at which the terminal device receives the RAR message or a time domain unit at which the first downlink control information DCI scheduling the second PUSCH is received.

[0243] In some embodiments, each of the first number of time domain units is a time domain unit within the active time of the cell DRX.

[0244] In some embodiments, the terminal device repeatedly sends the second PUSCH on a plurality of third time domain units, and the plurality of third time domain units are located within the active time of the cell DRX.

[0245] In some embodiments, the network device repeatedly receives the second PUSCH sent by the terminal device on a plurality of third time domain units.

[0246] In some embodiments, the first number is determined according to one or more of the following: a scheduling delay of the RAR uplink grant; a scheduling delay of the first DCI; a scheduling delay of a non-terrestrial network NTN scenario.

[0247] In some embodiments, the network device sends the first PDCCH to the terminal device during running of the first timer; the first PDCCH is used to schedule the first PDSCH; and the first PDSCH is used to carry the random access message 4.

[0248] In some embodiments, the network device sends the first PDSCH for carrying the random access message 4 to the terminal device after receiving the second PUSCH sent by the terminal device.

[0249] In some embodiments, the terminal device monitors the first PDCCH scheduling the first physical downlink shared channel PDSCH during running of the first timer starting from the fifth time domain unit; the fifth time domain unit is related to the active time of the cell DTX; and the first PDSCH is used to carry the random access message 4.

[0250] In some embodiments, the first timer runs in the active time of the cell DTX, and / or the first timer does not run outside the active time of the cell DTX.

[0251] In some embodiments, the fifth time domain unit is located after the sixth time domain unit, the sixth time domain unit corresponds to the last symbol of the second PUSCH, and the fifth time domain unit is different from the sixth time domain unit by the second time length.

[0252] In some embodiments, the fifth time domain unit corresponds to the first symbol after the sixth time domain unit by the second time length and within the active time of the cell DTX.

[0253] In some embodiments, the network device receives the first PUCCH; the first PUCCH is transmitted by the terminal device on the seventh time domain unit, the seventh time domain unit is related to the active time of the cell DRX, and the first PUCCH is used to carry an acknowledgement message.

[0254] In some embodiments, the terminal device transmits a first physical uplink control channel (PUCCH) corresponding to the first PDSCH on the seventh time domain unit; the seventh time domain unit is related to the active time of the cell DRX, and the first PUCCH is used to carry an acknowledgement message corresponding to the first PDSCH.

[0255] In some embodiments, the seventh time domain unit is located after the eighth time domain unit, the seventh time domain unit is separated from the eighth time domain unit by a second number of time domain units, and the eighth time domain unit is a time domain unit in which the terminal device receives the first PDSCH.

[0256] In some embodiments, the second number of time domain units are all time domain units within the active time of the cell DRX.

[0257] In some embodiments, the terminal device repeatedly transmits the first PUCCH on a plurality of seventh time domain units, and the plurality of seventh time domain units are within the active time of the cell DRX.

[0258] In some embodiments, the network device repeatedly receives the first PUCCH transmitted by the terminal device on a plurality of seventh time domain units.

[0259] In some embodiments, the second number is determined according to one or more of the following: a scheduling delay between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH; a scheduling delay of the NTN scenario.

[0260] In some embodiments, the first time length or the second time length is 0, or the first time length or the second time length is determined according to a round trip time (RTT) between the terminal device and the network device.

[0261] In some embodiments, the time domain unit can be a slot or a symbol.

[0262] In summary, according to the random access method of the embodiments of the present application, the terminal device can perform the random access procedure based on the cell DRX and / or the cell DTX, that is, the terminal device can determine the valid random access resource in the cell DRX and / or the cell DTX activation time, and then complete the random access procedure based on the valid random access resource, thereby flexibly implementing the random access procedure of the terminal.

[0263] The above introduces the random access method provided by the embodiments of the present application. In order to facilitate the understanding of the embodiments of the present application, the possible implementation scheme of the random access method suitable for the embodiments of the present application is introduced based on the interaction process of the network device and the terminal device.

[0264] Step 1: The terminal device sends PRACH to the network device.

[0265] In some embodiments, the terminal device sends PRACH to the network device on the random access resource to trigger the random access procedure.

[0266] 1.1, the random access resource is valid RO:

[0267] In some embodiments, if the cell DRX is configured, the terminal device determines the valid RO (first RO) according to the cell DRX activation time.

[0268] As a possible implementation, the RO within the cell DRX activation time is valid RO, and / or the RO outside the cell DRX activation time is invalid RO.

[0269] 1.2, the random access resource is PUSCH occasion:

[0270] It should be understood that for 2-step random access, after the terminal device sends PRACH to the network device on the valid RO, it needs to send PUSCH on the valid PUSCH occasion (first PUSCH occasion).

[0271] In some embodiments, if the cell DRX is configured, the terminal device determines the valid PUSCH occasion according to the cell DRX activation time.

[0272] An example, the PUSCH occasion within the cell DRX activation time is valid PUSCH occasion, and / or the PUSCH occasion outside the cell DRX activation time is invalid PUSCH occasion, further, for the determination of the valid PUSCH occasion in the random access procedure-free handover, the above method of determining the valid PUSCH occasion according to the cell DRX activation time can also be applied, which is not described here.

[0273] In some embodiments, the terminal device determines the time domain location and the frequency domain location of the RO according to the PRACH configuration information provided by the network device.

[0274] In some embodiments, for the time domain location of the RO, the terminal device determines the time domain location of the RO from the pre-defined candidate time domain locations according to the PRACH configuration index provided by the network device.

[0275] It should be noted that considering that the pre-defined candidate random access occasion RO time domain locations are limited, in some embodiments, the time domain location of the RO is determined according to at least one of the following provided in the PRACH configuration information (first information): RO period, RO frame offset value (first frame offset value).

[0276] For example, the RO frame offset value is a frame offset value within the RO period, or the RO frame offset value is a frame offset value relative to the pre-defined candidate RO time domain location (frame offset value of the pre-defined RO).

[0277] Based on this, the time domain location of the RO can be configured on any frame within the RO period, thereby providing the terminal device with more flexible RO time domain locations to match different cell discontinuous reception DRX configurations.

[0278] Step 2: The terminal device receives the RAR message sent by the network device.

[0279] It should be understood that in response to the PRACH transmission, the terminal device attempts to detect the DCI 1_0 scrambled with the RA-RNTI within the RAR window (first time window).

[0280] For example, the RAR window is started after the last symbol of the RO corresponding to the PRACH transmission, and the first symbol of the earliest CORESET where the terminal device is configured to receive the first candidate PDCCH of the Type1-PDCCH CSS set.

[0281] For another example, in an NTN system, if or is not equal to 0, considering the influence of NTN propagation delay, the first time window can be started after an additional T TA +k mac ms (first time length), wherein, is the timing advance (TA) calculated by the terminal device based on the satellite position and its own position, is the common TA determined based on the uplink synchronization reference point and the satellite position, T TA is the total TA considering and kmac RTT between the reference point and the network device is greater than or equal to a threshold.

[0282] In some embodiments, if the cell DTX is configured, the terminal device determines the first time domain unit of starting the RAR window according to the cell DTX activation time.

[0283] In an example, after the last symbol of the PRACH transmission corresponding to the first RO, and the first symbol of the earliest CORESET where the candidate PDCCH of the Type1-PDCCH CSS set configured for the terminal device is located within the cell DTX activation time, the terminal device starts the RAR window.

[0284] In another example, in the NTN system, the starting time of the RAR window additionally considers the RTT between the terminal device and the network device, that is, after the last symbol of the PRACH transmission corresponding to the first RO, and after T TA +k mac the first symbol of the earliest CORESET where the candidate PDCCH of the Type1-PDCCH CSS set configured for the terminal device is located within the cell DTX activation time, the terminal device starts the RAR window.

[0285] It should be understood that for 2-step random access, after the last symbol of the first PUSCH occasion corresponding to the PRACH transmission, and the first symbol of the earliest CORESET where the candidate PDCCH of the Type1-PDCCH CSS set configured for the terminal device is located within the cell DTX activation time, the terminal device starts the RAR window.

[0286] In an example, for 2-step random access, and in the NTN system, the starting time of the RAR window additionally considers the RTT between the terminal device and the network device, that is, after the last symbol of the first PUSCH occasion corresponding to the PRACH transmission, and after T TA +k mac the first symbol of the earliest CORESET where the candidate PDCCH of the Type1-PDCCH CSS set configured for the terminal device is located within the cell DTX activation time, the terminal device starts the RAR window.

[0287] As a possible implementation, considering that the RAR message can only be sent within the cell DTX activation time, the RAR window only runs within the cell DTX activation time, that is, the RAR window is suspended outside the cell DTX activation time, so as to avoid unnecessary listening activities of the terminal device outside the cell DTX activation time.

[0288] Step 3: The terminal device sends a second PUSCH for carrying Msg3 to the network device.

[0289] It should be understood that the Msg3 transmission is scheduled by the RAR uplink grant carried in the RAR message or the DCI 0_0 with the CRC scrambled by the TC-RNTI, if the terminal device receives the PDSCH carrying the RAR message or the DCI 0_0 with the CRC scrambled by the TC-RNTI in the slot n, the terminal device transmits the Msg3 PUSCH in the slot n+k2+Δ+2 μ ·K cell,offset transmit the scheduled Msg3 PUSCH (the second PUSCH carrying the Msg3), where k2 and Δ are used to determine the uplink scheduling delay, μ is a parameter related to the subcarrier spacing, K cell,offset The scheduling delay configured for the NTN scenario needs to cover the RTT between the terminal device and the reference point.

[0290] In some embodiments, if the cell DRX is configured, the terminal device determines the Msg3 PUSCH scheduling delay (a first number of time domain units) according to the cell DRX active time, and the Msg3 PUSCH scheduling delay includes at least one of the following: the RAR uplink grant or DCI scheduling delay (i.e., k2+Δ), the NTN scenario configured scheduling delay (i.e., K cell,offset ).

[0291] As a possible implementation, the RAR uplink grant or DCI (first DCI) scheduling delay, and / or the NTN scenario configured scheduling delay is only counted within the cell DRX active time.

[0292] In some embodiments, if the cell DRX is configured, and the terminal device is scheduled to transmit the Msg3 PUSCH repetition transmission in slots, the slots are only counted within the cell DRX active time, that is, the terminal device only performs the Msg3 PUSCH repetition transmission within the cell DRX active time, so as to ensure that the configured Msg3 PUSCH repetition transmission can be successfully transmitted.

[0293] Step 4: The terminal device receives the first PDSCH carrying the Msg4 transmitted by the network device.

[0294] It should be understood that in response to the Msg3 PUSCH repetition transmission, the terminal device attempts to detect the DCI 1_0 with the CRC scrambled by the TC-RNTI during the running of the contention resolution timer (first timer). Specifically, the contention resolution timer is started at the first symbol after the Msg3 PUSCH transmission. In addition, in the NTN system, the contention resolution timer is started at the first symbol after the Msg3 PUSCH transmission plus the RTT between the terminal device and the network device.

[0295] In some embodiments, if the cell DTX is configured, the terminal device determines the starting time of the contention resolution timer according to the cell DTX activation time.

[0296] An example is to start the contention resolution timer at the first symbol within the cell DTX activation time after the Msg3 PUSCH transmission.

[0297] Another example is to start the contention resolution timer at the first symbol within the cell DTX activation time after the Msg3 PUSCH transmission plus the RTT between the terminal device and the network device in the NTN system.

[0298] As a possible implementation, considering that the Msg4 PDSCH (the first PDSCH for carrying Msg4) can only be sent within the cell DTX activation time, as a possible implementation, the contention resolution timer is only run within the DTX activation time, so as to avoid unnecessary listening activities of the terminal device outside the cell DTX activation time.

[0299] Step 5: The terminal device sends a first PUCCH for carrying an acknowledgement message of the first PDSCH to the network device.

[0300] It should be understood that, in response to the Msg4 PDSCH (the first PDSCH) carrying the contention resolution identifier of the terminal device, the terminal device sends HARQ-ACK information (an acknowledgement message) in the Msg4 PUCCH (the first PUCCH). If the terminal device receives the Msg4 PDSCH carrying the contention resolution identifier of the terminal device at slot n, the terminal device sends the HARQ-ACK information in the Msg4 PUCCH at slot n+k, where k is the scheduling delay between the first PDSCH and the first PUCCH. The scheduled Msg4 PUCCH is sent, where k is the scheduling delay between the first PDSCH and the first PUCCH, and K is the scheduling delay configured for the NTN scenario. offset The scheduling delay configured for the NTN scenario needs to cover the RTT between the terminal device and the reference point, and μ and μK offset are respectively the first PUCCH and K offset corresponding to the subcarrier spacing related parameters.

[0301] In some embodiments, if the cell DRX is configured, the terminal device determines the Msg4 PUCCH scheduling delay according to the cell DRX activation time, and the Msg4 PUCCH scheduling delay includes at least one of the following: the scheduling delay between the first PDSCH and the first PUCCH (i.e., k), and the scheduling delay configured for the NTN scenario (i.e., K offset ).

[0302] As a possible implementation, the scheduling delay between PDSCH reception and PUCCH transmission (the scheduling delay between the terminal device receiving the first PDSCH and the terminal device sending the first PUCCH) and / or the scheduling delay of the NTN scenario is only counted within the cell DRX active time.

[0303] In some embodiments, if the cell DRX is configured, and the terminal device is scheduled to send the Msg4 PUCCH repetition transmission on slots, the slots are only counted within the cell DRX active time, that is, the terminal device only performs the Msg4 PUCCH repetition transmission within the cell DRX active time, so as to ensure that all configured Msg4 PUCCH repetition transmissions can be successfully sent.

[0304] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application. For example, in the above-described specific embodiments, various specific technical features described in the embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combination manners are not described again in the present application. For another example, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed in the present application. For another example, under the premise of no conflict, each embodiment described in the present application and / or the technical features in each embodiment can be combined with any prior art, and the technical solutions obtained after the combination should also fall within the protection scope of the present application.

[0305] It should also be understood that the size of the sequence number of the above processes does not mean the order of execution in various method embodiments of the present application, and the execution order of the processes should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink", "uplink" and "sidelink" are used to represent the transmission direction of signals or data, wherein "downlink" is used to represent the transmission direction of signals or data as the first direction from the station to the user equipment of the cell, "uplink" is used to represent the transmission direction of signals or data as the second direction from the user equipment of the cell to the station, and "sidelink" is used to represent the transmission direction of signals or data as the third direction from user equipment 1 to user equipment 2. For example, "downlink signal" represents that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, and indicates that there can be three relationships. Specifically, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0306] Based on the foregoing embodiments, the embodiments of the present application provide corresponding random access devices.

[0307] FIG. 19 is a structural composition schematic diagram of a random access device 1900 provided by the embodiments of the present application, which is applied to a terminal device, as shown in FIG. 24, the random access device 1900 comprises:

[0308] The random access unit 1901 is configured to perform a random access process based on cell discontinuous reception DRX and / or cell discontinuous transmission DTX.

[0309] In some embodiments, the random access device 1900 further comprises:

[0310] The second sending unit is configured to send a physical random access channel PRACH to a network device at a first random access occasion RO; the first RO is related to the activation time of the cell DRX.

[0311] In some embodiments, the first RO is located within the activation time of the cell DRX.

[0312] In some embodiments, the first RO is determined according to an RO period and a first frame offset value.

[0313] In some embodiments, the first frame offset value is any one of the following: a frame offset value within the RO period; a frame offset value relative to a predefined RO.

[0314] In some embodiments, the terminal device receives first information; the first information is used for configuring one or more of the following: the RO period; the first frame offset value.

[0315] In some embodiments, the second sending unit is further configured to send a first physical uplink shared channel (PUSCH) to the network device at a first PUSCH occasion; the first PUSCH occasion is related to the active time of the cell DRX; the first PUSCH occasion is after the first RO.

[0316] In some embodiments, the first PUSCH occasion is located within the active time of the cell DRX.

[0317] In some embodiments, the random access unit 1901 is further configured to cause the terminal device to listen to a random access response (RAR) message within a first time window starting at a first time domain unit; the first time domain unit is related to the active time of the cell DTX.

[0318] In some embodiments, the first time window runs within the active time of the cell DTX and / or the first time window does not run outside the active time of the cell DTX.

[0319] In some embodiments, the first time domain unit is after a second time domain unit corresponding to a last symbol of the PRACH or a last symbol of the first PUSCH; the first time domain unit is different from the second time domain unit by a first time length.

[0320] In some embodiments, the first time domain unit corresponds to a first symbol of a first control resource set (CORESET); the first CORESET is used to carry a first candidate physical downlink control channel (PDCCH); the first candidate PDCCH is a first candidate PDCCH in a first PDCCH search space set located within the DTX active time; the first PDCCH search space set is a search space set used to receive a PDCCH scheduling the RAR message.

[0321] In some embodiments, the second sending unit is further configured to send a second PUSCH at a third time domain unit; the third time domain unit is related to the active time of the cell DRX, and the second PUSCH is used to carry a random access message 3.

[0322] In some embodiments, the third time domain unit is located after a fourth time domain unit, the third time domain unit is spaced from the fourth time domain unit by a first number of time domain units, and the fourth time domain unit is a time domain unit in which the terminal device receives a RAR message or a time domain unit in which a first downlink control information (DCI) scheduling a second PUSCH is received.

[0323] In some embodiments, each of the first number of time domain units is a time domain unit within an active time of the cell DRX.

[0324] In some embodiments, the second sending unit is further configured to repeatedly send the second PUSCH on a plurality of third time domain units, the plurality of third time domain units being located within an active time of the cell DRX.

[0325] In some embodiments, the first number is determined according to one or more of: a scheduling delay of the RAR uplink grant; a scheduling delay of the first DCI; a scheduling delay of a non-terrestrial network (NTN) scenario.

[0326] In some embodiments, the random access unit 1901 is further configured to cause the terminal device to listen for a first PDCCH scheduling a first physical downlink shared channel (PDSCH) during a first timer running period starting from a fifth time domain unit, the fifth time domain unit being related to an active time of the cell DTX, and the first PDSCH being used to carry a random access message 4.

[0327] In some embodiments, the first timer runs within the active time of the cell DTX and / or the first timer does not run outside the active time of the cell DTX.

[0328] In some embodiments, the fifth time domain unit is located after a sixth time domain unit, the sixth time domain unit corresponding to a last symbol of the second PUSCH, and the fifth time domain unit being different from the sixth time domain unit by a second time length.

[0329] In some embodiments, the fifth time domain unit corresponds to a first symbol after the sixth time domain unit by the second time length and within the active time of the cell DTX.

[0330] In some embodiments, the second sending unit is further configured to send a first physical uplink control channel (PUCCH) corresponding to the first PDSCH on a seventh time domain unit, the seventh time domain unit being related to the active time of the cell DRX, and the first PUCCH being used to carry an acknowledgement message corresponding to the first PDSCH.

[0331] In some embodiments, the seventh time domain unit is located after an eighth time domain unit, the seventh time domain unit is spaced from the eighth time domain unit by a second number of time domain units, and the eighth time domain unit is a time domain unit in which the terminal device receives the first PDSCH.

[0332] In some embodiments, each of the second number of time domain units is a time domain unit within an active time of the cell DRX.

[0333] In some embodiments, the second sending unit is further configured to repeatedly send the first PUCCH on a plurality of seventh time domain units, the plurality of seventh time domain units being located within an active time of the cell DRX.

[0334] In some embodiments, the second number is determined according to one or more of the following: a scheduling delay between the terminal device receiving the first PDSCH and the terminal device sending the first PUCCH; a scheduling delay of an NTN scenario.

[0335] In some embodiments, the first time length or the second time length is 0, or the first time length or the second time length is determined according to a round trip time RTT between the terminal device and the network device.

[0336] In some embodiments, the time domain unit can be a slot or a symbol.

[0337] FIG. 20 is a structural composition diagram of a random access apparatus 2000 provided by embodiments of the present application, which is applied to a network device, as shown in FIG. 20, the random access apparatus 2000 includes:

[0338] A sending unit 2001 configured to send second information; the second information is used to configure a cell DRX and / or a cell DTX, the cell DRX and / or the cell DTX are used for a terminal device to perform a random access process.

[0339] In some embodiments, the random access apparatus 2000 further includes:

[0340] A receiving unit configured to receive a PRACH; the PRACH is sent by the terminal device on a first RO; the first RO is related to an active time of the cell DRX.

[0341] In some embodiments, the receiving unit is further configured to receive a first PUSCH; the first PUSCH is sent by the terminal device on a first PUSCH occasion; the first PUSCH occasion is related to the active time of the cell DRX; and the first PUSCH occasion is after the first RO.

[0342] In some embodiments, the sending unit 2001 is further configured to send, to the terminal device, a RAR message within the first time window.

[0343] In some embodiments, the receiving unit is further configured to receive a second PUSCH, the second PUSCH being sent by the terminal device on a third time domain unit, the third time domain unit being related to the active time of the cell DRX, and the second PUSCH being used to carry a random access message 3.

[0344] In some embodiments, the sending unit 2001 is further configured to send, to the terminal device, a first PDCCH during running of the first timer, the first PDCCH being used to schedule a first PDSCH, and the first PDSCH being used to carry a random access message 4.

[0345] In some embodiments, the receiving unit is further configured to receive a first PUCCH, the first PUCCH being sent by the terminal device on a seventh time domain unit, the seventh time domain unit being related to the active time of the cell DRX, and the first PUCCH being used to carry an acknowledgement message.

[0346] Those skilled in the art should understand that the above description of the random access apparatus of the embodiments of the present application can be understood with reference to the description of the random access method of the embodiments of the present application.

[0347] FIG. 21 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 2100 shown in FIG. 21 includes a processor 2110. The processor 2110 can invoke and run a computer program from a memory to implement the method of the embodiments of the present application.

[0348] Optionally, as shown in FIG. 21, the communication device 2100 can further include a memory 2120. The processor 2110 can invoke and run a computer program from the memory 2120 to implement the method of the embodiments of the present application.

[0349] The memory 2120 can be a separate device independent of the processor 2110, or can be integrated in the processor 2110.

[0350] Optionally, as shown in FIG. 21, the communication device 2100 can further include a transceiver 2130. The processor 2110 can control the transceiver 2130 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0351] The transceiver 2130 can include a transmitter and a receiver. The transceiver 2130 can further include an antenna, and the number of antennas can be one or more.

[0352] Optionally, the communication device 2100 can be specifically a network device of the embodiments of the present application, and the communication device 2100 can implement the corresponding processes in the various methods of the embodiments of the present application implemented by the network device. For the sake of brevity, they will not be repeated here.

[0353] Optionally, the communication device 2100 can be specifically a terminal device of the embodiments of the present application, and the communication device 2100 can implement the corresponding processes in the various methods of the embodiments of the present application implemented by the terminal device. For the sake of brevity, they will not be repeated here.

[0354] FIG. 22 is a schematic structural diagram of a chip according to the embodiments of the present application. The chip 2200 shown in FIG. 22 includes a processor 2210, which can call and run a computer program from a memory to implement the method in the embodiments of the present application.

[0355] Optionally, as shown in FIG. 22, the chip 2200 can further include a memory 2220. The processor 2210 can call and run a computer program from the memory 2220 to implement the method in the embodiments of the present application.

[0356] The memory 2220 can be a separate device independent of the processor 2210, or can be integrated in the processor 2210.

[0357] Optionally, the chip 2200 can further include an input interface 2230. The processor 2210 can control the input interface 2230 to communicate with other devices or chips, and specifically, information or data sent by other devices or chips can be acquired.

[0358] Optionally, the chip 2200 can further include an output interface 2240. The processor 2210 can control the output interface 2240 to communicate with other devices or chips, and specifically, information or data can be output to other devices or chips.

[0359] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes in the various methods of the embodiments of the present application implemented by the network device. For the sake of brevity, they will not be repeated here.

[0360] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes in the various methods of the embodiments of the present application implemented by the terminal device. For the sake of brevity, they will not be repeated here.

[0361] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0362] The embodiments of the present application further provide a computer storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the method in the embodiments of the present application.

[0363] FIG. 23 is a schematic block diagram of a communication system provided by the embodiments of the present application. As shown in FIG. 23, the communication system 2300 includes a terminal device 2310 and a network device 2320.

[0364] The terminal device 2310 can be used to implement the corresponding functions of the terminal device in the above method, and the network device 2320 can be used to implement the corresponding functions of the network device in the above method. For brevity, details are not repeated here.

[0365] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method embodiments can be completed by integrated logic circuits or instructions in the form of software in the processor. The processor mentioned above can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Each method, step and logic block disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a mature storage medium in the art, such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the above method.

[0366] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0367] It should be understood that the above-mentioned memory is exemplary but not limiting, for example, the memory in the embodiments of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0368] The embodiment of the present application further provides a computer readable storage medium for storing the computer program.

[0369] Optionally, the computer readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0370] Optionally, the computer readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the terminal device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0371] The embodiment of the present application further provides a computer program product comprising computer program instructions.

[0372] Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0373] Optionally, the computer program product can be applied to the terminal device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the terminal device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0374] The embodiment of the present application further provides a computer program.

[0375] Optionally, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0376] Optionally, the computer program can be applied to the terminal device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the terminal device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0377] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or in combination of computer software and electronic hardware. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0378] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0379] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0380] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0381] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0382] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the part of the present application that essentially contributes to the prior art or the part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0383] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of random access, the method comprising: performing, by a terminal device, a random access procedure based on a cell discontinuous reception (DRX) and / or a cell discontinuous transmission (DTX).

2. The method of claim 1, wherein, the method further comprising: transmitting, by the terminal device, a physical random access channel (PRACH) to a network device at a first random access occasion (RO), the first RO being associated with an active time of the cell DRX. 3.The method of claim 2, wherein the first RO is within the active time of the cell DRX. 4.The method of claim 2 or 3, wherein the first RO is determined according to a RO period and a first frame offset value. 5.The method of claim 4, wherein the first frame offset value is any one of: a frame offset value within the RO period; and a frame offset value relative to a predefined RO. 6.The method of claim 4 or 5, wherein the terminal device receives first information, the first information being used to configure one or more of: the RO period; and the first frame offset value.

7. The method according to any one of claims 1 to 6, wherein, the method further comprising: transmitting, by the terminal device, a first physical uplink shared channel (PUSCH) to the network device at a first PUSCH occasion, the first PUSCH occasion being associated with the active time of the cell DRX, and the first PUSCH occasion being after the first RO. 8.The method of claim 7, wherein the first PUSCH occasion is within the active time of the cell DRX.

9. The method of any one of claims 1-8, wherein, the method further comprising: listening, by the terminal device, for a random access response (RAR) message within a first time window starting at a first time domain unit, the first time domain unit being associated with an active time of the cell DTX. 10.The method of claim 9, wherein the first time window is running within the active time of the cell DTX and / or the first time window is not running outside the active time of the cell DTX. 11.The method of claim 9 or 10, wherein the first time domain unit is after a second time domain unit, the second time domain unit corresponding to a last symbol of the PRACH or a last symbol of the first PUSCH, and the first time domain unit is a first time duration away from the second time domain unit. 12.The method of any one of claims 9-11, wherein the first time domain unit corresponds to a first symbol of a first control resource set (CORESET), the first CORESET being used to carry a first candidate physical downlink control channel (PDCCH), the first candidate PDCCH being a first candidate PDCCH in a first PDCCH search space set that is within the active time of the DTX, and the first PDCCH search space set being a search space set used to receive a PDCCH scheduling the RAR message.

13. The method of any one of claims 1-12, wherein, the method further comprising: transmitting, by the terminal device, a second PUSCH at a third time domain unit, the third time domain unit being associated with the active time of the cell DRX, and the second PUSCH being used to carry a random access message 3. 14.The method of claim 13, wherein the third time domain unit is located after a fourth time domain unit, the third time domain unit is spaced from the fourth time domain unit by a first number of time domain units, and the fourth time domain unit is a time domain unit in which the terminal device receives a RAR message or a time domain unit in which a first downlink control information (DCI) scheduling a second PUSCH is received. 15.The method of claim 14, wherein each of the first number of time domain units is a time domain unit within an active time of the cell DRX.

16. The method of any one of claims 13-15, wherein, The method further comprises: The terminal device repeatedly transmits the second PUSCH on a plurality of third time domain units, the plurality of third time domain units being located within the active time of the cell DRX. 17.The method of any one of claims 13-16, wherein the first number is determined according to one or more of the following: a scheduling delay of the RAR uplink grant; a scheduling delay of the first DCI; a scheduling delay of a non-terrestrial network (NTN) scenario.

18. The method of any one of claims 1-17, wherein, The method further comprises: The terminal device listens for a first PDCCH scheduling a first physical downlink shared channel (PDSCH) during a running time of a first timer, the first timer starting at a fifth time domain unit, the fifth time domain unit being related to the active time of the cell DTX, and the first PDSCH being used to carry a random access message 4. 19.The method of claim 18, wherein the first timer runs within the active time of the cell DTX and / or the first timer does not run outside the active time of the cell DTX. 20.The method of claim 18 or 19, wherein the fifth time domain unit is located after a sixth time domain unit, the sixth time domain unit corresponding to a last symbol of the second PUSCH, and the fifth time domain unit is different from the sixth time domain unit by a second time duration. 21.The method of claim 20, wherein the fifth time domain unit corresponds to a first symbol after the sixth time domain unit by the second time duration and within the active time of the cell DTX. The method further comprises:

22. The method of any one of claims 1-21, wherein, The terminal device transmits a first physical uplink control channel (PUCCH) corresponding to the first PDSCH on a seventh time domain unit, the seventh time domain unit being related to the active time of the cell DRX, and the first PUCCH being used to carry an acknowledgement message corresponding to the first PDSCH. 23.The method of claim 22, wherein the seventh time domain unit is located after an eighth time domain unit, the seventh time domain unit is spaced from the eighth time domain unit by a second number of time domain units, and the eighth time domain unit is a time domain unit in which the terminal device receives the first PDSCH. 24.The method of claim 23, wherein each of the second number of time domain units is a time domain unit within the active time of the cell DRX. The method further comprises:

25. The method of any one of claims 22-24, wherein, The terminal device repeatedly transmits the first PUCCH on a plurality of seventh time domain units, the plurality of seventh time domain units being located within the active time of the cell DRX. ​ 26. The method of claim 23 or 24, wherein the second quantity is determined according to one or more of the following: a scheduling delay between the terminal device receiving the first PDSCH and the terminal device transmitting the first PUCCH; a scheduling delay for an NTN scenario.

27. The method of claim 11 or 20, wherein the first duration or the second duration is 0, or the first duration or the second duration is determined according to a round trip time (RTT) between the terminal device and the network device.

28. The method of any one of claims 9-27, wherein the time domain unit is a slot or a symbol.

29. A method of random access, the method comprising: a network device transmitting second information; the second information being used to configure a cell DRX and / or a cell DTX, the cell DRX and / or the cell DTX being used for a terminal device to perform a random access procedure.

30. The method of claim 29, further comprising: the network device receiving a PRACH; the PRACH being transmitted by the terminal device on a first RO; the first RO being related to an active time of the cell DRX.

31. The method of claim 29 or 30, further comprising: the network device receiving a first PUSCH; the first PUSCH being transmitted by the terminal device on a first PUSCH occasion; the first PUSCH occasion being related to the active time of the cell DRX; the first PUSCH occasion being after the first RO.

32. The method of any one of claims 29-31, further comprising: the network device transmitting a RAR message to the terminal device within a first time window.

33. The method of any one of claims 29-32, further comprising: the network device receiving a second PUSCH; the second PUSCH being transmitted by the terminal device on a third time domain unit; the third time domain unit being related to the active time of the cell DRX, the second PUSCH being used to carry a random access message 3.

34. The method of claim 33, further comprising: the network device repeatedly receiving the second PUSCH transmitted by the terminal device on a plurality of third time domain units.

35. The method of any one of claims 29-34, further comprising: the network device transmitting a first PDCCH to the terminal device during a running of a first timer; the first PDCCH being used to schedule a first PDSCH; the first PDSCH being used to carry a random access message 4.

36. The method of any one of claims 29-35, further comprising: the network device receiving a first PUCCH; the first PUCCH being transmitted by the terminal device on a seventh time domain unit, the seventh time domain unit being related to the active time of the cell DRX, the first PUCCH being used to carry an acknowledgement message.

37. The method of claim 36, further comprising: The network device repeatedly receives the first PUCCH transmitted by the terminal device on a plurality of seventh time domain units.

38. A random access apparatus applied to a terminal device, the apparatus comprising: a random access unit configured to perform a random access procedure based on cell discontinuous reception (DRX) and / or cell discontinuous transmission (DTX).

39. A random access apparatus applied to a network device, the apparatus comprising: a sending unit configured to send second information; the second information is used to configure cell DRX and / or cell DTX, the cell DRX and / or the cell DTX are used for a terminal device to perform a random access procedure.

40. A terminal device comprising: a memory for storing computer executable instructions; a processor connected with the memory, configured to implement the method in any one of claims 1 to 28 by executing the computer executable instructions.

41. A network device comprising: a memory for storing computer executable instructions; a processor connected with the memory, configured to implement the method in any one of claims 29 to 35 by executing the computer executable instructions.

42. A chip, the chip comprising: a processor for calling and running a computer program from a memory, so that a device installed with the chip performs the method in any one of claims 1 to 28, or the method in any one of claims 29 to 37; a transceiver for receiving and sending information in the process of transceiving information between devices or chips.

43. A computer readable storage medium for storing a computer program, the computer program causing a computer to execute the method in claims 1 to 28, or the method in any one of claims 29 to 37.

44. A computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the method in any one of claims 1 to 28, or the method in any one of claims 29 to 37.

45. A computer program, the computer program causing a computer to execute the method in any one of claims 1 to 28, or the method in any one of claims 29 to 37.

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