Method and device in terminal used for wireless communication

Abstract

Disclosed are a method and device used in a terminal for wireless communication, comprising: at a first DRX active time, performing first monitoring on a PDCCH for a first RNTI, the PDCCH indicating a first downlink multicast transmission and an HARQ process number of the first downlink multicast transmission being a first HARQ process number; receiving the first downlink multicast transmission, wherein the first bit block generates the first downlink multicast transmission; wherein the first downlink multicast transmission is not decoded correctly; the first DRX active time comprises an operation period of a fourth timer; when downlink multicast transmission is received, discontinuous reception can be better carried out.

Description

Technical Field

[0001] This application relates to a method for broadcast multicast in a wireless communication system, especially power saving for multicast scenarios. Background Art

[0002] The application scenarios of future wireless communication systems are becoming increasingly diversified, and different application scenarios pose different performance requirements on the system. In order to meet the different performance requirements of various application scenarios, it was decided at the 72nd plenary session of 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) to study the new air interface technology (NR, New Radio) (or Fifth Generation, 5G). At the 75th plenary session of 3GPP RAN, the WI (Work Item) of NR was approved, and the standardization work of NR began.

[0003] In communication, whether it is LTE (Long Term Evolution) or 5G NR, it involves the accurate reception of reliable information, optimized energy efficiency ratio, determination of information validity, flexible resource allocation, scalable system architecture, efficient non-access stratum information processing, low service interruption and disconnection rates, support for low power consumption, which is of great significance for the normal communication between base stations and user equipment, for the reasonable scheduling of resources, and for the balance of system load. It can be said to be the cornerstone of high throughput, meeting the communication needs of various services, improving spectrum utilization, and improving service quality. It is indispensable for both eMBB (enhanced Mobile BroadBand), URLLC (Ultra Reliable Low Latency Communication), and eMTC (enhanced Machine Type Communication). At the same time, in the IIoT (Industrial Internet of Things in the industrial field), in V2X (Vehicular to X), in device-to-device communication, in communication on unlicensed spectrum, in user communication quality monitoring, in network planning and optimization, in TN (Territerial Network), in dual-connectivity systems, in wireless resource management and multi-antenna codebook selection, in signaling design, neighbor cell management, service management, and in beamforming, there are extensive requirements. The information sending methods are divided into broadcast and unicast, and both are essential for the 5G system because they are very helpful for meeting the above requirements.

[0004] With the continuous increase in the scenarios and complexity of the system, higher requirements are put forward for reducing the interruption rate, reducing latency, enhancing reliability, enhancing system stability, for service flexibility, and for power savings. At the same time, compatibility between different system versions also needs to be considered during system design. Summary of the Invention

[0005] The researchers found that an important means of saving power is to utilize the DRX (Discontinuous Reception) mechanism. In a scenario where two HARQ timers of DRX, namely the first timer and the second timer, need to be used simultaneously when receiving a downlink multicast transmission through a HARQ process with a first HARQ process number, the expiration of the first timer triggers the start of a third timer, and the second timer triggers the start of a fourth timer. The running period of the fourth timer is the active time, during which the terminal needs to consume power to monitor the PDCCH. How to avoid the unnecessary start of the fourth timer is a technical problem that needs to be solved.

[0006] In response to the above problems, the present application provides a solution.

[0007] It should be noted that, without conflict, the embodiments and features in the embodiments in any node of the present application can be applied to any other node. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily. At the same time, the method proposed in the present application can also be used to solve other problems in communication, such as problems in NR evolution and 6G systems.

[0008] As an embodiment, the interpretation of the terms in the present application refers to the definitions in the 3GPP specification protocol series TS38.

[0009] As an embodiment, the interpretation of the terms in the present application refers to the definitions in the 3GPP specification protocol series TS37.

[0010] The present application discloses a method used in a terminal for wireless communication, including: performing a first monitoring of the PDCCH for a first RNTI during a first DRX active time, where the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is a first HARQ process number; receiving the first downlink multicast transmission, where a first bit block generates the first downlink multicast transmission; where the first downlink multicast transmission is not correctly decoded; the first DRX active time includes the running period of a fourth timer;

[0011] Send a first HARQ feedback signal; in response to sending the first HARQ feedback signal, start a first timer for the HARQ process identified by the first HARQ process number; in response to sending the first HARQ feedback signal, start a second timer for the HARQ process identified by the first HARQ process number; wherein, the expiration of the first timer triggers the start of the third timer; the first timer and the second timer are respectively HARQ timers of DRX; the third timer is a retransmission timer of DRX; the second DRX active time includes the running period of the third timer;

[0012] During the second DRX active time, perform a second monitoring on the PDCCH for the second RNTI;

[0013] Wherein, the first RNTI includes at least one of G-RNTI and G-CS-RNTI; the second RNTI is C-RNTI; the start of the fourth timer depends on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring, wherein the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; the start of the fourth timer depending on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring includes: stopping the second timer after receiving an indication of a first downlink transmission on the PDCCH during the second monitoring, or the expiration of the second timer does not trigger the start of the fourth timer.

[0014] As an embodiment, the problems to be solved by the present application include: in a scenario where two HARQ timers of DRX, namely the first timer and the second timer, need to be used simultaneously when receiving a downlink multicast transmission through the HARQ process with the first HARQ process number, how to avoid unnecessary start of the fourth timer.

[0015] As an embodiment, the benefits of the above method include: more power saving, improved system flexibility, improved flexibility of DRX configuration, improved system stability, reduced complexity, and optimized transmission and discontinuous reception of multicast services.

[0016] Specifically, according to one aspect of the present application, the start of the fourth timer depending on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring includes: when an indication of a first downlink transmission is not received on the PDCCH during the second monitoring, the expiration of the second timer triggers the start of the fourth timer.

[0017] Specifically, according to one aspect of the present application, an indication of the first downlink transmission is received on the PDCCH during the second monitoring;

[0018] Among them, stopping the second timer after receiving an indication of a first downlink transmission on the PDCCH in the second monitoring includes: receiving an indication of the first downlink transmission on the PDCCH in the second monitoring triggers stopping the second timer.

[0019] Specifically, according to one aspect of the present application, receiving an indication of the first downlink transmission on the PDCCH in the second monitoring; receiving the first downlink transmission; among them, stopping the second timer after receiving an indication of a first downlink transmission on the PDCCH in the second monitoring includes: receiving the first downlink transmission triggers stopping the second timer.

[0020] Specifically, according to one aspect of the present application, receiving an indication of the first downlink transmission on the PDCCH in the second monitoring; receiving the first downlink transmission; sending a second HARQ feedback signal; in response to sending the second HARQ feedback signal, starting the first timer for the HARQ process identified by the first HARQ process number; stopping at least the former of the third timer and the fourth timer; among them, stopping the second timer after receiving an indication of a first downlink transmission on the PDCCH in the second monitoring includes: sending the second HARQ feedback signal triggers stopping the second timer.

[0021] Specifically, according to one aspect of the present application, receiving a first signaling, the first signaling indicating enabling HARQ feedback; the first HARQ-ACK reporting mode is used.

[0022] Specifically, according to one aspect of the present application, receiving a second signaling, the second signaling configuring DRX, including configuring a fifth timer and a sixth timer; among them, the fifth timer runs at the start of a first DRX cycle; the sixth timer runs at the start of a second DRX cycle; the first DRX active time includes the running period of the fifth timer; the second DRX active time includes the running period of the sixth timer.

[0023] Specifically, according to one aspect of the present application, the second signaling configures the values of the first timer and the second timer, where the value configured for the first timer is less than the value configured for the second timer.

[0024] Specifically, according to one aspect of the present application, the first timer is drx-HARQ-RTT-TimerDL; the second timer is drx-HARQ-RTT-TimerDL-PTM; the third timer is drx-RetransmissionTimerDL; the fourth timer is drx-RetransmissionTimerDL-PTM.

[0025] Specifically, according to one aspect of the present application, the terminal is an Internet of Things terminal.

[0026] Specifically, according to one aspect of the present application, the terminal is a user equipment.

[0027] Specifically, according to one aspect of the present application, the terminal is an access network device.

[0028] Specifically, according to one aspect of the present application, the terminal is a vehicle-mounted terminal.

[0029] Specifically, according to one aspect of the present application, the terminal is a mobile phone.

[0030] The present application discloses a terminal for discontinuous reception in wireless communication, including:

[0031] One or more processors and a memory;

[0032] The memory is coupled to the one or more processors, and the memory is used to store computer program code. The computer program code includes computer instructions, and the one or more processors call the computer instructions to enable the terminal to execute the method in the above-mentioned terminal for wireless communication.

[0033] As an embodiment, compared with the traditional solution, the present application has the following advantages:

[0034] In the scenario of downlink multicast transmission, since the first timer and the second timer for the same HARQ process are used simultaneously, the expiration of the first timer triggers the start of the third timer; and the second DRX active time includes the running period of the third timer. When a retransmission is received during the second DRX active time, it implies that the network will send the retransmission via PTP. At this time, attempting to receive the retransmission via PTM is inefficient, and it is possible that the network will not send the retransmission via PTM again, which will also result in power consumption and increase additional complexity. Therefore, in this scenario, the operation of the fourth timer is unnecessary. The method proposed in this application is beneficial to reducing complexity, enabling the fourth timer to operate only when necessary, saving more power, avoiding errors caused by unforeseen situations, and better supporting the flexible configuration of the first timer and the second timer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0036] Figure 1 A flowchart showing performing a first monitoring of a PDCCH for a first RNTI, receiving a first downlink multicast transmission, sending a first HARQ feedback signal, and starting a first timer for the HARQ process identified by the first HARQ process number and starting a second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal, and performing a second monitoring of a PDCCH for the second RNTI according to an embodiment of the present application;

[0037] Figure 2 A schematic diagram showing a network architecture according to an embodiment of the present application;

[0038] Figure 3 A schematic diagram showing an embodiment of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0039] Figure 4 A schematic diagram showing a first communication device and a second communication device according to an embodiment of the present application;

[0040] Figure 5 A flowchart showing a radio signal transmission according to an embodiment of the present application;

[0041] Figure 6 A schematic diagram showing a timing relationship according to an embodiment of the present application;

[0042] Figure 7 A schematic diagram showing the timing relationship according to an embodiment of the present application is shown;

[0043] Figure 8 A schematic diagram showing the timing relationship according to an embodiment of the present application is shown;

[0044] Figure 9 A schematic diagram showing the timing relationship according to an embodiment of the present application is shown;

[0045] Figure 10 A schematic diagram of a processing device for a terminal according to an embodiment of the present application is exemplified. Detailed implementation manners

[0046] The technical solutions of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily.

[0047] Example 1

[0048] Embodiment 1 exemplifies a flowchart of performing a first monitoring on PDCCH for a first RNTI, receiving a first downlink multicast transmission, sending a first HARQ feedback signal, and starting a first timer for the HARQ process identified by the first HARQ process number and starting a second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal, and performing a second monitoring on PDCCH for the second RNTI, as shown in the accompanying Figure 1 figure. In the accompanying Figure 1 figure, each block represents a step. It should be emphasized that the order of the blocks in the figure does not represent the chronological order between the represented steps.

[0049] In Embodiment 1, the terminal in the present application performs a first monitoring on PDCCH for a first RNTI in step 101; receives a first downlink multicast transmission in step 102; sends a first HARQ feedback signal and starts a first timer for the HARQ process identified by the first HARQ process number and starts a second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal in step 103; and performs a second monitoring on PDCCH for the second RNTI in step 104;

[0050] Among them, in the first monitoring, the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is the first HARQ process number; a first bit block generates the first downlink multicast transmission; the first downlink multicast transmission is not correctly decoded; the expiration of the first timer triggers the start of the third timer; the first timer and the second timer are respectively the HARQ timers of DRX; the third timer and the fourth timer are respectively the retransmission timers of DRX; the first RNTI includes at least one of G-RNTI and G-CS-RNTI; the second RNTI is C-RNTI; the start of the fourth timer depends on whether an indication of a first downlink transmission is received on the PDCCH in the second monitoring, where the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; the start of the fourth timer depending on whether an indication of a first downlink transmission is received on the PDCCH in the second monitoring includes: stopping the second timer after an indication of a first downlink transmission is received on the PDCCH in the second monitoring, or the expiration of the second timer does not trigger the start of the fourth timer; the first DRX active time includes the running period of the fourth timer; the second DRX active time includes the running period of the third timer.

[0051] As an embodiment, the terminal is a UE (User Equipment).

[0052] As an embodiment, the terminal is in the RRC connected state.

[0053] As an embodiment, the terminal is configured with discontinuous reception (DRX) for multicast.

[0054] As an embodiment, any parameter in this application is either configured by the network or can be generated by the terminal according to an internal algorithm, such as randomly.

[0055] As an embodiment, the values of the timers in this application are all finite and do not exceed 2560 milliseconds.

[0056] As an embodiment, the value of the timer is the running time when the timer is not intervened.

[0057] As an embodiment, the values of any parameter in this application, including but not limited to the values of timers and counters, are finite unless otherwise stated.

[0058] As a sub-embodiment of this embodiment, the upper limit of the value of any parameter in this application is 1024 times that of 65536.

[0059] As a sub - embodiment of this embodiment, the upper limit of the value of any parameter in this application is 65536 or 65535.

[0060] As a sub - embodiment of this embodiment, the upper limit of the value of any parameter in this application is 1024.

[0061] As a sub - embodiment of this embodiment, the upper limit of the value of any parameter in this application is 640 or 320.

[0062] As an embodiment, this application is directed to NR.

[0063] As an embodiment, this application is directed to an evolved radio communication network for NR.

[0064] As an embodiment, the serving cell refers to the cell where the UE camps. Performing cell search includes the UE searching for a suitable cell of the selected PLMN (Public Land Mobile Network) or SNPN (Stand - alone Non - Public Network), selecting the suitable cell to provide available services, and monitoring the control channel of the suitable cell. This process is defined as camping on the cell; that is, a camped cell, with respect to this UE, is the serving cell of this UE. Camping on a cell in the RRC idle state or RRC inactive state has the following benefits: enabling the UE to receive system messages from the PLMN or SNPN; when registered, if the UE wishes to establish an RRC connection or resume a suspended RRC connection, the UE can achieve this by performing initial access on the control channel of the camped cell; the network can page the UE; enabling the UE to receive ETWS (Earthquake and Tsunami Warning System) and CMAS (Commercial Mobile Alert System) notifications.

[0065] As an example, for a UE in the RRC connected state without CA / DC (carrier aggregation / dual connectivity) configured, there is only one serving cell, which includes the primary cell. For a UE in the RRC connected state with CA / DC (carrier aggregation / dual connectivity) configured, the serving cell is used to indicate a set of cells including the special cell (SpCell, Special Cell) and all secondary cells. The primary cell is an MCG (Master Cell Group) cell that operates on the primary frequency, and the UE performs the initial connection establishment process or initiates connection re-establishment on the primary cell. For dual connectivity operation, the special cell refers to the PCell (Primary Cell) of the MCG or the PSCell (Primary SCGCell) of the SCG (Secondary Cell Group); if it is not a dual connectivity operation, the special cell refers to the PCell.

[0066] As an example, the frequency on which the SCell (Secondary Cell) operates is the secondary frequency.

[0067] As an example, the individual content of an information element is called a field.

[0068] As an example, MR-DC (Multi-Radio Dual Connectivity) refers to the dual connectivity between an E-UTRA and an NR node, or the dual connectivity between two NR nodes.

[0069] As an example, in MR-DC, the radio access node that provides the control plane connection to the core network is the master node, and the master node can be the master eNB, the master ng-eNB, or the master gNB.

[0070] As an example, MCG refers to a set of serving cells associated with the master node in MR-DC, including the SpCell, and may also, optionally, include one or more SCells.

[0071] As an example, the PCell is the SpCell of the MCG.

[0072] As an example, the PSCell is the SpCell of the SCG.

[0073] As an example, in MR-DC, a radio access node that does not provide a control plane connection to the core network and provides additional resources to the UE is a secondary node. The secondary node can be an en-gNB, a secondary ng-eNB, or a secondary gNB.

[0074] As an example, in MR-DC, a set of serving cells associated with the secondary node is an SCG (secondary cell group), including a SpCell and, optionally, one or more SCell.

[0075] As an example, the SpCell is a PCell or the SpCell is a PSCell.

[0076] As an example, in the RRC inactive state, DC is not used.

[0077] As an example, in the RRC inactive state, CA is typically not used.

[0078] As an example, an RRC information block refers to an information element in an RRC message.

[0079] As an example, an SSB can be referred to as an SS / PBCH, or an SS block.

[0080] As an example, L1 is Layer-1 or the physical layer.

[0081] As an example, this application is directed to NR and NR evolved networks, such as 6G networks.

[0082] As an example, an RRC information block can include one or more RRC information blocks.

[0083] As an example, an RRC information block can not include any RRC information blocks, but only include at least one parameter.

[0084] As an example, a radio bearer includes at least a signaling radio bearer and a data radio bearer.

[0085] As an example, a radio bearer is a service or service interface provided by the PDCP layer to a higher layer.

[0086] As a sub-example of this example, the higher layer includes one of the RRC layer, NAS, and SDAP layer.

[0087] As an example, a signaling radio bearer is a service or service interface provided by the PDCP to a higher layer.

[0088] As a sub - embodiment of this embodiment, the higher layer includes the RRC layer, at least the former in NAS.

[0089] As an embodiment, the data radio bearer is a service or an interface of a service provided by PDCP to a higher layer.

[0090] As a sub - embodiment of this embodiment, the higher layer includes the SDAP layer, at least the former in NAS.

[0091] As an embodiment, when the terminal establishes an RRC connection with the network, the terminal enters the RRC connected state.

[0092] As a sub - embodiment of this embodiment, the network is a radio access network (RAN).

[0093] As an embodiment, when the terminal does not establish an RRC connection with the network, the terminal is in the RRC idle state.

[0094] As a sub - embodiment of this embodiment, the network is a radio access network (RAN).

[0095] As an embodiment, when the RRC connection established by the terminal with the network is suspended, the terminal enters the RRC inactive state.

[0096] As a sub - embodiment of this embodiment, the network is a radio access network (RAN).

[0097] As an embodiment, different functions are supported in different RRC states.

[0098] As an embodiment, only very limited functions are supported in the non - RRC connected state.

[0099] As an embodiment, the non - RRC connected state is or includes the RRC idle state.

[0100] As an embodiment, the non - RRC connected state is or includes the RRC inactive state.

[0101] As an embodiment, this application is applicable to the RRC connected state.

[0102] As an embodiment, after DRX is configured, the terminal is only required to monitor the PDCCH during the active time.

[0103] As a sub - embodiment of this embodiment, such a mechanism is beneficial to saving the power of the terminal.

[0104] As a sub - embodiment of this embodiment, the terminal can sleep at times other than the active time.

[0105] As an example, after DRX is configured, the terminal is only required to monitor the PDCCH for the first RNTI within the first DRX active time.

[0106] As an example, after DRX is configured, the terminal is only required to monitor the PDCCH for the second RNTI within the second DRX active time.

[0107] As an example, step 102 further includes stopping the third timer.

[0108] As an example, step 102 further includes stopping the fourth timer.

[0109] As an example, in the first monitoring, when the PDCCH indicates a first downlink multicast transmission, the third timer is stopped.

[0110] As an example, in the first monitoring, when the PDCCH indicates a first downlink multicast transmission, the fourth timer is stopped.

[0111] As an example, the first DRX active time is of finite length.

[0112] As an example, the first DRX active time includes a plurality of discontinuous time periods.

[0113] As an example, the first DRX active time is for the first RNTI (Radio Network Temporary Indentifier).

[0114] As an example, the first DRX active time corresponds to PTM (point to multipoint).

[0115] As an example, the first DRX active time corresponds to multicast.

[0116] As an example, the first DRX active time may overlap, partially overlap, or not overlap with the second DRX active time.

[0117] As an example, the method proposed in this application does not limit whether and how the first DRX active time and the second DRX active time overlap.

[0118] As an example, the time included in the first DRX active time is determined by the running periods of a plurality of timers, and the name of any one of the plurality of timers includes PTM.

[0119] As a sub - embodiment of this embodiment, the plurality of timers includes the third timer.

[0120] As a sub - embodiment of this embodiment, the value of any one of the plurality of timers is finite.

[0121] As an embodiment, the second DRX active time is of finite length.

[0122] As an embodiment, the second DRX active time includes a plurality of discontinuous time periods.

[0123] As an embodiment, the second DRX active time is for the second RNTI (Radio Network Temporary Indentifier).

[0124] As an embodiment, the second DRX active time corresponds to PTP (point to point) or unicast.

[0125] As an embodiment, the second DRX active time is for a DRX group.

[0126] As an embodiment, the time included in the second DRX active time is determined by the running periods of a plurality of timers, where the name of any one of the plurality of timers does not include PTM.

[0127] As a sub - embodiment of this embodiment, the plurality of timers includes the fourth timer.

[0128] As a sub - embodiment of this embodiment, the value of any one of the plurality of timers is finite.

[0129] As an embodiment, the first monitoring includes receiving a PDCCH (physical downlink control channel).

[0130] As an embodiment, the first monitoring includes attempting to receive a PDCCH.

[0131] As an embodiment, the first monitoring includes descrambling the PDCCH.

[0132] As an embodiment, the first monitoring includes decoding DCI (downlink control information) on the PDCCH.

[0133] As an example, the first monitoring includes verifying the DCI on the PDCCH.

[0134] As an example, the first monitoring includes performing radio frequency and / baseband processing on the PDCCH.

[0135] As an example, the first monitoring includes attempting to receive the PDCCH using the spatial parameters configured by the network.

[0136] As an example, the first monitoring includes attempting to receive the PDCCH on at least one candidate time - frequency resource.

[0137] As an example, the first monitoring includes attempting to receive the PDCCH on at least one candidate time - frequency resource using the configured parameters.

[0138] As an example, the first monitoring includes performing blind decoding on the PDCCH.

[0139] As an example, the first monitoring belongs to blind detection.

[0140] As an example, the first monitoring is the monitoring of the PDCCH.

[0141] As an example, the first monitoring is the monitoring of the PDCCH for the first RNTI.

[0142] As an example, performing the first monitoring on the PDCCH for the first RNTI includes: descrambling the PDCCH using the first RNTI.

[0143] As an example, performing the first monitoring on the PDCCH for the first RNTI includes: descrambling the information on the PDCCH using the first RNTI.

[0144] As an example, performing the first monitoring on the PDCCH for the first RNTI includes: receiving the information on the PDCCH for the first RNTI.

[0145] As an example, the PDCCH indicating the first downlink multicast transmission includes: the DCI on the PDCCH indicating the first downlink multicast transmission.

[0146] As an example, the DCI indicating unicast transmission and the DCI indicating multicast transmission use different DCI formats.

[0147] As an example, the PDCCH indicating the first downlink multicast transmission includes: the DCI with the first DCI format on the PDCCH indicating the first downlink multicast transmission.

[0148] As an embodiment, the downlink transmissions indicated by the DCI of the first DCI format are all multicast downlink transmissions.

[0149] As an embodiment, the first DCI format is DCI format 4_2.

[0150] As an embodiment, the HARQ process number indicated by the PDCCH for the first downlink multicast transmission is the first HARQ process number.

[0151] As an embodiment, a field in the DCI on the PDCCH indicates that the HARQ process number of the first downlink multicast transmission is the first HARQ process number.

[0152] As an embodiment, the terminal uses 8 or 16 or 32 or a configurable number of HARQ processes.

[0153] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the time-frequency resources of the first downlink multicast transmission.

[0154] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the spatial parameters of the first downlink multicast transmission.

[0155] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the PUCCH resources of the first downlink multicast transmission.

[0156] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the HARQ feedback parameters of the first downlink multicast transmission.

[0157] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the modulation and coding parameters of the first downlink multicast transmission.

[0158] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the reference signal resources of the first downlink multicast transmission.

[0159] As an embodiment, the PDCCH indicating the first downlink multicast transmission includes indicating the priority of the first downlink multicast transmission.

[0160] As an embodiment, the meaning of the PDCCH indicating the first downlink multicast transmission is that the PDCCH schedules the first downlink multicast transmission.

[0161] As an embodiment, the first HARQ process number is an identifier of a HARQ process.

[0162] As an example, receiving the first downlink multicast transmission includes radio frequency processing and baseband processing.

[0163] As an example, receiving the first downlink multicast transmission includes decoding.

[0164] As an example, receiving the first downlink multicast transmission includes demodulation.

[0165] As an example, receiving the first downlink multicast transmission includes receiving by applying spatial parameters.

[0166] As an example, receiving the first downlink multicast transmission includes receiving according to the indication of the PDCCH in the first monitoring.

[0167] As an example, the first downlink multicast transmission is a PTM transmission.

[0168] As an example, the first downlink multicast transmission is a multicast transmission.

[0169] As an example, the first downlink multicast transmission carries MBS (multicast broadcast service).

[0170] As an example, the first downlink multicast transmission includes transmitting a transport block.

[0171] As a sub - example of this example, the one transport block carries a MAC PDU (protocol data unit).

[0172] As an example, the first downlink multicast transmission includes a transmission on the PDSCH.

[0173] As a sub - example of this example, the one transmission on the PDSCH is indicated by the PDCCH in the first monitoring.

[0174] As an example, the first downlink multicast transmission includes coding blocks.

[0175] As a sub - example of this example, the coding blocks are generated from the first bit blocks.

[0176] As an example, the PDCCH indicating the first downlink multicast transmission includes indicating that the first downlink multicast transmission is a new transmission or an initial transmission.

[0177] As an example, the physical channel occupied by the first downlink multicast transmission is the PDSCH (physical downlink shared channel).

[0178] As an example, the first HARQ feedback signal is HARQ (Hybrid Automatic Repeat Request) feedback.

[0179] As an example, the first HARQ feedback signal is sent on the first PUCCH (physical uplink control channel).

[0180] As an example, the first HARQ feedback signal is a physical layer signal.

[0181] As an example, the first HARQ feedback signal is used to feedback whether the first downlink multicast transmission is correctly received.

[0182] As an example, the first HARQ feedback signal is used to feedback whether the first downlink multicast transmission is correctly decoded.

[0183] As an example, the first HARQ feedback signal is used to feedback whether the first bit block is correctly decoded.

[0184] As an example, the first HARQ feedback signal is a HARQ-ACK type feedback signal.

[0185] As an example, the first HARQ feedback signal is an ACK-NACK type feedback signal.

[0186] As an example, the first HARQ feedback signal feedbacks NACK.

[0187] As an example, the first HARQ feedback signal is for the first downlink multicast transmission.

[0188] As an example, the reception of the first downlink multicast transmission triggers the first HARQ feedback signal.

[0189] As an example, the first timer is for the HARQ process identified by the first HARQ process number.

[0190] As an example, the third timer is for the HARQ process identified by the first HARQ process number.

[0191] As an example, the second timer is for the HARQ process identified by the first HARQ process number.

[0192] As an example, the fourth timer is for the HARQ process identified by the first HARQ process number.

[0193] As an example, the meaning of starting the first timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal includes: the first timer was not running before being started.

[0194] As an example, when a timer is started, this timer must be in a non - running state before being started.

[0195] As an example, the meaning of starting the first timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal includes: before the first timer for the HARQ process identified by the first HARQ process number is started, the first timer for the HARQ process identified by the first HARQ process number has expired or has never been started.

[0196] As an example, the meaning of starting the second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal includes: the second timer was not running before being started.

[0197] As an example, the meaning of starting the second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal includes: before the second timer for the HARQ process identified by the first HARQ process number is started, the second timer for the HARQ process identified by the first HARQ process number has expired or has never been started.

[0198] As an example, the terminal sends a first HARQ feedback signal; in response to sending the first HARQ feedback signal, starts the first timer for the HARQ process identified by the first HARQ process number; in response to sending the first HARQ feedback signal, starts the second timer for the HARQ process identified by the first HARQ process number; stops the third timer; stops the fourth timer.

[0199] As an example, the terminal stops the third timer along with the sending of the first HARQ feedback signal.

[0200] As an example, when the terminal sends the first HARQ feedback signal, it stops the fourth timer.

[0201] As an example, starting the first timer in response to sending the first HARQ feedback signal for the HARQ process identified by the first HARQ process number is the first run of starting the first timer.

[0202] As an example, starting the second timer in response to sending the first HARQ feedback signal for the HARQ process identified by the first HARQ process number is the first run of starting the second timer.

[0203] As an example, the first RNTI is used to scramble the first downlink multicast transmission.

[0204] As an example, the second monitoring includes receiving a PDCCH (physical downlink control channel).

[0205] As an example, the second monitoring includes attempting to receive a PDCCH.

[0206] As an example, the second monitoring includes descrambling the PDCCH.

[0207] As an example, the second monitoring includes decoding DCI (downlink control information) on the PDCCH.

[0208] As an example, the second monitoring includes verifying the DCI on the PDCCH.

[0209] As an example, the second monitoring includes performing radio frequency and / or baseband processing on the PDCCH.

[0210] As an example, the second monitoring includes attempting to receive a PDCCH using the space parameters configured by the network.

[0211] As an example, the second monitoring includes attempting to receive a PDCCH on at least one candidate time - frequency resource.

[0212] As an example, the second monitoring includes attempting to receive a PDCCH on at least one candidate time - frequency resource using the configured parameters.

[0213] As an example, the second monitoring includes blindly decoding the PDCCH.

[0214] As an embodiment, the second monitoring belongs to blind detection.

[0215] As an embodiment, the second monitoring is the monitoring of PDCCH.

[0216] As an embodiment, the second monitoring is the monitoring of PDCCH for the second RNTI.

[0217] As an embodiment, the triple monitoring of PDCCH for the second RNTI includes: descrambling PDCCH using the second RNTI.

[0218] As an embodiment, the second monitoring of PDCCH for the second RNTI includes: descrambling the information on PDCCH using the second RNTI.

[0219] As an embodiment, the second monitoring of PDCCH for the second RNTI includes: receiving the information on PDCCH for the second RNTI.

[0220] As an embodiment, in the first monitoring, the DCI that the terminal attempts to receive uses the first DCI format.

[0221] As an embodiment, in the second monitoring, the DCI that the terminal attempts to receive uses the second DCI format.

[0222] As an embodiment, none of the downlink transmissions indicated by the DCI of the second DCI format are multicast downlink transmissions.

[0223] As an embodiment, the second DCI format is one of DCI format 1_0 or DCI format 1_1.

[0224] As an embodiment, the terminal determines whether the first downlink multicast transmission is correctly decoded through CRC check.

[0225] As an embodiment, the first downlink multicast transmission uses CRC (Cyclic Redundancy Check).

[0226] As an embodiment, the terminal determines whether the first downlink transmission is correctly decoded through CRC check.

[0227] As an embodiment, the first downlink transmission uses CRC.

[0228] As an embodiment, the terminal determines whether the first bit block is correctly decoded through CRC check.

[0229] As an example, the first bit block uses CRC.

[0230] As an example, if the first bit block is not correctly decoded, then the first downlink multicast transmission is not correctly decoded.

[0231] As an example, if the first bit block is not correctly decoded, then the first downlink transmission is not correctly decoded.

[0232] As an example, the meaning that the first timer and the second timer are respectively the HARQ timers of DRX includes: both the first timer and the second timer are for the process identified by the first HARQ process number.

[0233] As an example, the meaning that the first timer and the second timer are respectively the HARQ timers of DRX includes: the names of both the first timer and the second timer include HARQ.

[0234] As an example, the meaning that the first timer and the second timer are respectively the HARQ timers of DRX includes: the first timer and the second timer are respectively drx-HARQ-RTT-TimerDL and drx-HARQ-RTT-TimerDL-PTM.

[0235] As an example, the meaning that the first timer and the second timer are respectively the HARQ timers of DRX includes: the start conditions of both the first timer and the second timer are triggered by sending HARQ feedback signals.

[0236] As an example, the third timer is for the HARQ process identified by the first HARQ process number.

[0237] As an example, the fourth timer is for the HARQ process identified by the first HARQ process number.

[0238] As an example, the meaning that the third timer and the fourth timer are respectively the retransmission timers of DRX includes: the names of both the third timer and the fourth timer respectively include retransmission.

[0239] As an example, the meaning that the third timer and the fourth timer are respectively the retransmission timers of DRX includes: the third timer and the fourth timer are respectively drx-RetransmissionTimerDL and drx-RetransmissionTimerDL-PTM.

[0240] As an example, the meaning that the third timer and the fourth timer are respectively the retransmission timers of DRX includes that the running periods of the third timer and the fourth timer are respectively for receiving retransmissions.

[0241] As an example, the second monitoring is later than the first monitoring.

[0242] As an example, the first DRX active time includes the running period of the fourth timer.

[0243] As an example, the second DRX active time includes the running period of the third timer.

[0244] As an example, the first timer is for unicast or PTP.

[0245] As an example, the first timer is not for multicast.

[0246] As an example, the first timer is not for PTM.

[0247] As an example, the first timer is for PTM.

[0248] As an example, the first timer is for multicast.

[0249] As an example, the value of the first timer is finite.

[0250] As an example, the value of the second timer is finite.

[0251] As an example, the first RNTI identifies a group.

[0252] As an example, the second RNTI identifies the terminal.

[0253] As a sub - example of this example, the second RNTI identifies the terminal within the serving cell of the terminal.

[0254] As an example, the first RNTI is an RNTI for multiple terminals.

[0255] As an example, the second RNTI is an RNTI for a cell.

[0256] As a sub - example of this example, the second RNTI is valid within the serving cell of the terminal.

[0257] As an example, the first RNTI is a G - RNTI.

[0258] As an example, the first RNTI is G-CS-RNTI.

[0259] As an example, G-CS-RNTI is used for configuring scheduling.

[0260] As an example, G-RNTI is used for dynamic scheduling.

[0261] As an example, the second RNTI is C-RNTI.

[0262] As an example, one of the first RNTI and the second RNTI is for a cell and the other is for a group.

[0263] As an example, one of the first RNTI and the second RNTI is for the terminal and the other is for a group.

[0264] As an example, the first bit block is the information to be carried by the first downlink multicast transmission.

[0265] As an example, the first downlink multicast transmission is generated according to the first bit block.

[0266] As an example, the first downlink multicast transmission is generated after baseband processing of the first bit block.

[0267] As an example, the first downlink multicast transmission is the result of baseband processing of the first bit block.

[0268] As an example, the generation of the first downlink transmission by the first bit block includes: at least some of the bits output after encoding the first bit block and the parity bits are or belong to the first downlink multicast transmission.

[0269] As a sub-example of this example, the first bit block is second interleaved before encoding.

[0270] As a sub-example of this example, the at least some bits only include redundant bits.

[0271] As a sub-example of this example, the at least some bits only include at least some information bits and at least some redundant bits.

[0272] As a sub-example of this example, which of the at least some bits depends on the redundancy version of the first downlink transmission indicated by the PDCCH.

[0273] As an example, the generation of the first downlink multicast transmission by the first bit block includes: at least some of the bits of the output after rate matching of the output after encoding the first bit block and the parity bits are or belong to the first downlink multicast transmission.

[0274] As a sub - example of this example, the first bit block is second - interleaved before encoding.

[0275] As a sub - example of this example, the at least some bits only include redundant bits.

[0276] As a sub - example of this example, the at least some bits only include at least some information bits and at least some redundant bits.

[0277] As a sub - example of this example, which of the at least some bits depends on the redundancy version of the first downlink multicast transmission indicated by the PDCCH.

[0278] As an example, the generation of the first downlink multicast transmission by the first bit block includes: at least some of the bits of the output after rate matching of the output after first - interleaving and then encoding the first bit block and the parity bits are or belong to the first downlink multicast transmission.

[0279] As a sub - example of this example, the first bit block is second - interleaved before encoding.

[0280] As a sub - example of this example, the at least some bits only include redundant bits.

[0281] As a sub - example of this example, the at least some bits only include at least some information bits and at least some redundant bits.

[0282] As a sub - example of this example, which of the at least some bits depends on the redundancy version of the first downlink multicast transmission indicated by the PDCCH.

[0283] As an example, the generation of the first downlink multicast transmission by the first bit block includes: at least some of the bits of the output after first - interleaving of the output after rate matching and then encoding the first bit block and the parity bits are or belong to the first downlink multicast transmission.

[0284] As a sub - example of this example, the first bit block is second - interleaved before encoding.

[0285] As a sub - example of this example, the at least some bits only include redundant bits.

[0286] As a sub - embodiment of this embodiment, the at least part of the bits only includes at least part of the information bits and at least part of the redundant bits.

[0287] As a sub - embodiment of this embodiment, which of the at least part of the bits depends on the redundant version of the first downlink multicast transmission indicated by the PDCCH.

[0288] As an embodiment, the first downlink transmission is a repetition of the first downlink multicast transmission.

[0289] As an embodiment, the first downlink transmission carries part of the information of the first bit block.

[0290] As an embodiment, whether the first downlink transmission is a repetition of the first downlink multicast transmission depends on the redundant version of the first downlink transmission.

[0291] As an embodiment, the first downlink transmission is generated according to the first bit block.

[0292] As an embodiment, the first downlink transmission is generated after baseband processing of the first bit block.

[0293] As an embodiment, the first downlink transmission is the result after baseband processing of the first bit block.

[0294] As an embodiment, the generation of the first downlink transmission by the first bit block includes: at least part of the bits of the output after encoding the first bit block and the parity bits are or belong to the first downlink transmission.

[0295] As a sub - embodiment of this embodiment, the first bit block is second - interleaved before encoding.

[0296] As a sub - embodiment of this embodiment, the at least part of the bits only includes redundant bits.

[0297] As a sub - embodiment of this embodiment, the at least part of the bits only includes at least part of the information bits and at least part of the redundant bits.

[0298] As a sub - embodiment of this embodiment, which of the at least part of the bits depends on the redundant version of the first downlink transmission indicated by the PDCCH.

[0299] As an embodiment, the generation of the first downlink transmission by the first bit block includes: at least part of the bits of the output after rate - matching the output after encoding the first bit block and the parity bits are or belong to the first downlink transmission.

[0300] As a sub - embodiment of this embodiment, the first bit block is second - interleaved before encoding.

[0301] As a sub - embodiment of this embodiment, the at least part of the bits only includes redundant bits.

[0302] As a sub - embodiment of this embodiment, the at least part of the bits only includes at least part of the information bits and at least part of the redundant bits.

[0303] As a sub - embodiment of this embodiment, which of the at least part of the bits depends on the redundancy version of the first downlink transmission indicated by the PDCCH.

[0304] As an embodiment, the first bit block generating the first downlink transmission includes: at least part of the bits of the output after the first bit block and the check bits are encoded, then first - interleaved, and then rate - matched are or belong to the first downlink transmission.

[0305] As a sub - embodiment of this embodiment, the first bit block is second - interleaved before encoding.

[0306] As a sub - embodiment of this embodiment, the at least part of the bits only includes redundant bits.

[0307] As a sub - embodiment of this embodiment, the at least part of the bits only includes at least part of the information bits and at least part of the redundant bits.

[0308] As a sub - embodiment of this embodiment, which of the at least part of the bits depends on the redundancy version of the first downlink transmission indicated by the PDCCH.

[0309] As an embodiment, the first bit block generating the first downlink transmission includes: at least part of the bits of the output after the first bit block and the check bits are rate - matched, then first - interleaved are or belong to the first downlink transmission.

[0310] As a sub - embodiment of this embodiment, the first bit block is second - interleaved before encoding.

[0311] As a sub - embodiment of this embodiment, the at least part of the bits only includes redundant bits.

[0312] As a sub - embodiment of this embodiment, the at least part of the bits only includes at least part of the information bits and at least part of the redundant bits.

[0313] As a sub - embodiment of this embodiment, which of the at least part of the bits depends on the redundancy version of the first downlink transmission indicated by the PDCCH.

[0314] As an embodiment, the first downlink multicast transmission carries all the bits of the first bit block.

[0315] As an embodiment, the first bit block is the information bits carried by the first downlink multicast transmission.

[0316] As an embodiment, the first downlink multicast transmission carries the redundant bits generated by the first bit block.

[0317] As an embodiment, the first downlink transmission carries all the bits of the first bit block.

[0318] As an embodiment, the first downlink transmission carries partial bits of the first bit block.

[0319] As an embodiment, the first bit block is the information bits carried by the first downlink transmission.

[0320] As an embodiment, the information bits carried by the first downlink transmission only include partial bits of the first bit block.

[0321] As an embodiment, the first downlink transmission carries the redundant bits generated by the first bit block.

[0322] As an embodiment, whether the redundant bits generated by the first bit block carried by the first downlink multicast transmission are the same as the redundant bits generated by the first bit block carried by the first downlink transmission depends on the HARQ algorithm.

[0323] As an embodiment, whether the redundant bits generated by the first bit block carried by the first downlink multicast transmission are the same as the redundant bits generated by the first bit block carried by the first downlink transmission depends on the indication of the PDCCH.

[0324] As an embodiment, the start of the fourth timer depends on whether an indication of the first downlink transmission is received on the PDCCH in the second monitoring, including: when the indication of the first downlink transmission is not received on the PDCCH in the second monitoring, the expiration of the second timer triggers the start of the fourth timer.

[0325] As an embodiment, stopping the second timer after receiving the indication of the first downlink transmission on the PDCCH in the second monitoring includes: receiving the first downlink transmission triggers the stop of the second timer.

[0326] As a sub - embodiment of this embodiment, when the first downlink transmission is not received, the expiration of the second timer triggers the start of the fourth timer.

[0327] As a sub - embodiment of this embodiment, when the first downlink transmission is received, the fourth timer is not running.

[0328] As an embodiment, stopping the second timer after receiving an indication of the first downlink transmission on the PDCCH in the second monitoring includes: The transmission of the second HARQ feedback signal triggers the stop of the second timer.

[0329] As a sub - embodiment of this embodiment, when the received first downlink transmission is not correctly decoded, the expiration of the second timer triggers the start of the fourth timer.

[0330] As a sub - embodiment of this embodiment, when the second HARQ feedback signal is transmitted, the fourth timer is not running.

[0331] As an embodiment, the first timer is drx - HARQ - RTT - TimerDL.

[0332] As an embodiment, the second timer is drx - HARQ - RTT - TimerDL - PTM.

[0333] As an embodiment, the third timer is drx - RetransmissionTimerDL.

[0334] As an embodiment, the fourth timer is drx - RetransmissionTimerDL - PTM.

[0335] As an embodiment, stopping the second timer after receiving an indication of the first downlink transmission on the PDCCH in the second monitoring is to stop the second timer before it expires.

[0336] As an embodiment, stopping the second timer after receiving an indication of the first downlink transmission on the PDCCH in the second monitoring is to stop the second timer regardless of whether it has expired.

[0337] As an embodiment, the start of the fourth timer depending on whether an indication of the first downlink transmission is received on the PDCCH in the second monitoring includes: When the fourth timer is not running, the start of the fourth timer depends on whether an indication of the first downlink transmission is received on the PDCCH in the second monitoring.

[0338] As an embodiment, when it comes to whether an indication of the first downlink transmission is received on the PDCCH in the second monitoring, the fourth timer is not running.

[0339] As an example, the meaning of starting a first timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal is that if the first HARQ feedback signal is sent, the first timer for the HARQ process identified by the first HARQ process number is started.

[0340] As an example, the meaning of starting a second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal is that if the first HARQ feedback signal is sent, the second timer for the HARQ process identified by the first HARQ process number is started.

[0341] As an example, the first downlink multicast transmission is an initial transmission.

[0342] As an example, the first downlink transmission is a retransmission.

[0343] As an example, the first RNTI is used to scramble the first downlink multicast transmission.

[0344] As an example, the second RNTI is used to scramble the first downlink transmission.

[0345] As an example, the terminal performs a third monitoring on the PDCCH for the first RNTI during the first DRX active time.

[0346] As a sub - example of this example, the third monitoring is after the second monitoring.

[0347] As a sub - example of this example, the third monitoring is after the first monitoring.

[0348] As a sub - example of this example, the terminal fails to receive an indication of the first downlink transmission on the PDCCH during the second monitoring.

[0349] As an example, the start of the fourth timer is triggered only by the expiration of the second timer.

[0350] As an example, the start of the third timer is triggered only by the expiration of the first timer.

[0351] As an example, the start of the first timer is triggered only by sending a HARQ feedback signal.

[0352] As an example, the start of the second timer is triggered only by sending a HARQ feedback signal.

[0353] Example 2

[0354] Example 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in the attached Figure 2 figure.

[0355] The attached Figure 2FIG. illustrates the network architecture 200 of 5G NR, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. The 5G NR or LTE network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. The 5GS / EPS 200 may include one or more UEs (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services. However, those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. The gNB 203 provides user and control plane protocol termination towards the UE 201. The gNB 203 may be connected to other gNBs 204 via the Xn interface (e.g., backhaul). The gNB 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP (Transmission and Reception Point), or some other suitable term. The gNB 203 provides an access point to the 5GC / EPC 210 for the UE 201. Examples of UEs 201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to the UE 201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.gNB203 is connected to 5GC / EPC210 via the S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Date Network Gateway) / UPF 213. MME / AMF / SMF 211 is a control node that processes signaling between UE201 and 5GC / EPC210. Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocal) packets are transmitted through S-GW / UPF 212, and S-GW / UPF 212 itself is connected to P-GW / UPF 213. P-GW provides UE IP address allocation and other functions. P-GW / UPF 213 is connected to the Internet service 230. The Internet service 230 includes operator-corresponding Internet protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0356] As an embodiment, the terminal in this application is UE201.

[0357] As an embodiment, the base station of the second node in this application is gNB203.

[0358] As an embodiment, the radio link from the UE201 to the NR node B is an uplink.

[0359] As an embodiment, the radio link from the NR node B to the UE201 is a downlink.

[0360] As an embodiment, the UE201 includes a mobile phone.

[0361] As an embodiment, the UE201 is a means of transportation including an automobile.

[0362] As an embodiment, the gNB203 is a macrocellular base station.

[0363] As an example, the gNB 203 is a Micro Cell base station.

[0364] As an example, the gNB 203 is a Pico Cell base station.

[0365] As an example, the gNB 203 is an aerial platform device.

[0366] As an example, the gNB 203 is a satellite device.

[0367] Example 3

[0368] Example 3 shows a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present application, as shown in the appendix Figure 3 as follows. Figure 3 It is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. Figure 3Show the radio protocol architecture of the control plane 300 for a terminal (UE, gNB) and a second node (gNB, UE), or between two UEs, with three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. Layer 1 will be referred to as PHY 301 in this document. Layer 2 (L2 layer) 305 is above PHY 301 and is responsible for the link between the terminal and the second node, and between two UEs through PHY 301. Layer 2 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, and these sublayers terminate at the second node. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets, and provides handover support for the terminal between second nodes. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in a cell between terminals. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second node and the terminal. The PC5-S (PC5 Signaling Protocol) sublayer 307 is responsible for handling the signaling protocol of the PC5 interface. The radio protocol architecture of the user plane 350 includes Layer 1 (L1 layer) and Layer 2 (L2 layer). For the physical layer 351, the PDCP sublayer 354 in L2 layer 355, the RLC sublayer 353 in L2 layer 355, and the MAC sublayer 352 in L2 layer 355, the radio protocol architecture for the terminal and the second node in the user plane 350 is generally the same as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead.The L2 layer 355 in the user plane 350 further includes an SDAP (Service Data Adaptation Protocol) sub-layer 356. The SDAP sub-layer 356 is responsible for the mapping between QoS flows and data radio bearers (DRBs) to support service diversity. The SRB can be regarded as a service or interface provided by the PDCP layer to higher layers, such as the RRC layer. In the NR system, the SRB includes SRB1, SRB2, and SRB3, which are respectively used to transmit different types of control signaling. The SRB is a bearer between the UE and the access network and is used to transmit control signaling including RRC signaling between the UE and the access network. SRB1 is of particular significance to the UE. After each UE establishes an RRC connection, there will be an SRB1 for transmitting RRC signaling. Most of the signaling is transmitted through SRB1. If SRB1 is interrupted or unavailable, the UE must perform RRC reconstruction. SRB2 is generally only used to transmit NAS signaling or signaling related to security. The UE may not be configured with SRB3. Except for emergency services, the UE must establish an RRC connection with the network to perform subsequent communication. Although not shown, the terminal may have several upper layers above the L2 layer 355. In addition, it also includes a network layer (e.g., IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, a server, etc.).

[0369] As an example, the Figure 3 radio protocol architecture in is applicable to the terminal described in this application.

[0370] As an example, the Figure 3 radio protocol architecture in is applicable to the second node described in this application.

[0371] As an example, the first downlink multicast transmission in this application is generated at PHY351.

[0372] As an example, the first downlink transmission in this application is generated at PHY351.

[0373] As an example, the first signaling in this application is generated at RRC306 or MAC302 or PHY301.

[0374] As an example, the second signaling in this application is generated at RRC306.

[0375] As an example, the DCI in this application is generated at PHY301.

[0376] As an example, the first HARQ feedback signal in this application is generated at PHY301.

[0377] As an example, the second HARQ feedback signal in the present application is generated at PHY301.

[0378] Example 4

[0379] Example 4 shows a schematic diagram of a first communication device and a second communication device according to an example of the present application, as shown in the appendix Figure 4 as shown. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 that communicate with each other in an access network.

[0380] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, and optionally a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0381] The second communication device 410 includes a controller / processor 475, a memory 476, a receiving processor 470, a transmitting processor 416, and optionally a multi-antenna receiving processor 472, a multi-antenna transmitting processor 471, a transmitter / receiver 418, and an antenna 420.

[0382] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of the L2 (Layer-2) layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time domain and / or frequency domain, and then uses the inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. Subsequently, the multi-antenna transmit processor 471 performs transmit analog precoding / beamforming operations on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream and then provides it to different antennas 420.

[0383] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives signals via its respective antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream that is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 perform various signal processing functions of the L1 layer. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receivers 454. The receive processor 456 uses the fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receive processor 456, where the reference signal will be used for channel estimation, and the data signal recovers any spatial streams destined for the first communication device 450 after multi-antenna detection in the multi-antenna receive processor 458. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. Subsequently, the receive processor 456 decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. Subsequently, the upper layer data and control signals are provided to the controller / processor 459. The controller / processor 459 performs the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the second communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the core network. Subsequently, the upper layer data packets are provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 for L3 processing.

[0384] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, a data source 467 is used to provide an upper layer data packet to a controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmit function described at the second communication device 410 in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, and implements L2 layer functions for the user plane and the control plane. The controller / processor 459 is also responsible for retransmission of lost packets and signaling to the second communication device 410. A transmit processor 468 performs modulation mapping and channel coding processing, and a multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Subsequently, the transmit processor 468 modulates the generated spatial streams into multi-carrier / single-carrier symbol streams, and after an analog precoding / beamforming operation in the multi-antenna transmit processor 457, provides them to different antennas 452 via a transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and then provides it to the antenna 452.

[0385] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receive function described at the first communication device 450 in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 jointly implement L1 layer functions. A controller / processor 475 implements L2 layer functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packet from the UE 450. The upper layer data packet from the controller / processor 475 may be provided to the core network.

[0386] As an example, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the first communication device 450 at least: perform a first monitoring of a PDCCH for a first RNTI during a first DRX active time, where the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is a first HARQ process number; receive the first downlink multicast transmission, where a first bit block generates the first downlink multicast transmission; where the first downlink multicast transmission is not correctly decoded; the first DRX active time includes a running period of a fourth timer; send a first HARQ feedback signal; in response to sending the first HARQ feedback signal, start a first timer for the HARQ process identified by the first HARQ process number; in response to sending the first HARQ feedback signal, start a second timer for the HARQ process identified by the first HARQ process number; where the expiration of the first timer triggers the start of a third timer; the first timer and the second timer are respectively HARQ timers of DRX; the third timer is a retransmission timer of DRX; the second DRX active time includes a running period of the third timer; perform a second monitoring of the PDCCH for the second RNTI during the second DRX active time; where the first RNTI includes at least one of a G-RNTI and a G-CS-RNTI; the second RNTI is a C-RNTI; the start of the fourth timer depends on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring, where the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; the start of the fourth timer depending on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring includes: stopping the second timer after an indication of a first downlink transmission is received on the PDCCH during the second monitoring, or the expiration of the second timer does not trigger the start of the fourth timer.

[0387] As an example, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: during a first DRX active time, performing a first monitoring on a PDCCH for a first RNTI, where the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is a first HARQ process number; receiving the first downlink multicast transmission, where a first bit block generates the first downlink multicast transmission; where the first downlink multicast transmission is not correctly decoded; the first DRX active time includes a running period of a fourth timer; sending a first HARQ feedback signal; in response to sending the first HARQ feedback signal, starting a first timer for the HARQ process identified by the first HARQ process number; in response to sending the first HARQ feedback signal, starting a second timer for the HARQ process identified by the first HARQ process number; where expiration of the first timer triggers starting of the third timer; the first timer and the second timer are respectively HARQ timers of DRX; the third timer is a retransmission timer of DRX; the second DRX active time includes a running period of the third timer; during a second DRX active time, performing a second monitoring on a PDCCH for the second RNTI; where the first RNTI includes at least one of a G-RNTI and a G-CS-RNTI; the second RNTI is a C-RNTI; starting of the fourth timer depends on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring, where the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; starting of the fourth timer depending on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring includes: stopping the second timer after an indication of a first downlink transmission is received on the PDCCH during the second monitoring, or expiration of the second timer does not trigger starting of the fourth timer.

[0388] As an example, the first communication device 450 corresponds to the terminal in this application.

[0389] As an example, the second communication device 410 corresponds to the second node in this application.

[0390] As an example, the first communication device 450 is a UE.

[0391] As an example, the first communication device 450 is a vehicle-mounted terminal.

[0392] As an example, the first communication device 450 is a mobile phone.

[0393] As an example, the second communication device 450 is a relay.

[0394] As an example, the second communication device 410 is a satellite.

[0395] As an example, the second communication device 410 is an aircraft.

[0396] As an example, the second communication device 410 is a base station.

[0397] As an example, the receiver 454 (including the antenna 452), the receiving processor 456, and the controller / processor 459 are used to receive the first signaling in this application.

[0398] As an example, the receiver 454 (including the antenna 452), the receiving processor 456, and the controller / processor 459 are used to receive the second signaling in this application.

[0399] As an example, the receiver 454 (including the antenna 452), the receiving processor 456, and the controller / processor 459 are used to receive DCI in this application.

[0400] As an example, the receiver 454 (including the antenna 452), the receiving processor 456, and the controller / processor 459 are used to receive PDCCH in this application.

[0401] As an example, the receiver 454 (including the antenna 452), the receiving processor 456, and the controller / processor 459 are used to receive the first downlink multicast transmission in this application.

[0402] As an example, the receiver 454 (including the antenna 452), the receiving processor 456, and the controller / processor 459 are used to receive the first downlink transmission in this application.

[0403] As an example, the transmitter 454 (including the antenna 452), the transmitting processor 468, and the controller / processor 459 are used to send the first HARQ feedback signal in this application.

[0404] As an example, the transmitter 454 (including the antenna 452), the transmitting processor 468, and the controller / processor 459 are used to send the second HARQ feedback signal in this application.

[0405] Example 5

[0406] Example 5 exemplifies a wireless signal transmission flowchart according to an embodiment of the present application, as shown in the attached Figure 5 figure. In the attached Figure 5 figure, U01 corresponds to the terminal of the present application. It should be particularly noted that the order in this example does not limit the signal transmission order and implementation order in the present application, and the steps in F51 and F52 are optional.

[0407] For Terminal U01 , in step S5101, receive the first signaling; in step S5102, receive the second signaling; in step S5103, perform the first monitoring on the PDCCH for the first RNTI; in step S5104, receive the first downlink multicast transmission; in step S5105, send the first HARQ feedback signal; in step S5106, start the first timer for the HARQ process identified by the first HARQ process number and start the second timer for the HARQ process identified by the first HARQ process number in response to sending the first HARQ feedback signal; in step S5107, perform the second monitoring on the PDCCH for the second RNTI; in step S5108, perform subsequent steps according to whether an indication of the first downlink transmission is received on the PDCCH during the second monitoring; in step S5109, no indication of the first downlink transmission is received on the PDCCH during the second monitoring; in step S5110, the second timer expires and the expiration of the second timer triggers the start of the fourth timer; in step S5111, an indication of the first downlink transmission is received on the PDCCH during the second monitoring; in step S5112, receive the first downlink transmission; in step S5113, send the second HARQ feedback signal; in step S5114, stop the second timer or the expiration of the second timer does not trigger the start of the fourth timer.

[0408] For Second Node U02 , in step S5201, send the first signaling; in step S5202, send the second signaling; in step S5203, send the first downlink multicast transmission; in step S5204, receive the first HARQ feedback signal; in step S5205, send the first downlink transmission; in step S5206, receive the second HARQ feedback signal.

[0409] In Embodiment 5, step S5103 is executed during the first DRX active time, where the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is the first HARQ process number; where a first bit block generates the first downlink multicast transmission; step S5107 is executed during the second DRX active time; the first downlink multicast transmission is not correctly decoded; the expiration of the first timer triggers the start of the third timer; the first timer and the second timer are respectively the HARQ timers of DRX; the third timer and the fourth timer are respectively the retransmission timers of DRX; the first RNTI includes at least one of G-RNTI and G-CS-RNTI; the second RNTI is C-RNTI; the start of the fourth timer depends on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring, where the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; the start of the fourth timer depending on whether an indication of a first downlink transmission is received on the PDCCH during the second monitoring includes: stopping the second timer after an indication of a first downlink transmission is received on the PDCCH during the second monitoring, or the expiration of the second timer does not trigger the start of the fourth timer; the first DRX active time includes the running period of the fourth timer; the second DRX active time includes the running period of the third timer.

[0410] As an embodiment, the second node U02 is the base station corresponding to the PCell of the terminal U01.

[0411] As an embodiment, the second node U02 is the serving cell of the terminal or the base station corresponding to the serving cell.

[0412] As an embodiment, the terminal U01 receives the first signaling in the RRC connected state.

[0413] As an embodiment, the terminal U01 receives the second signaling in the RRC connected state.

[0414] As an embodiment, the first signaling indicates enabling HARQ feedback.

[0415] As an embodiment, the first signaling is an RRC signaling.

[0416] As an embodiment, the first signaling is an RRC reconfiguration signaling.

[0417] As an embodiment, the first signaling is an RRCReconfiguration signaling.

[0418] As an example, the first signaling is an information block in RRCReconfiguration.

[0419] As an example, the first signaling indicates that the first HARQ feedback signal uses the first HARQ-ACK reporting mode.

[0420] As an example, the first signaling indicates that the second HARQ feedback signal uses the first HARQ-ACK reporting mode.

[0421] As an example, the first signaling indicates that the fourth HARQ feedback signal uses the first HARQ-ACK reporting mode.

[0422] As an example, the PDCCH indicates that the first HARQ feedback signal uses the first HARQ-ACK reporting mode.

[0423] As an example, the PDCCH indicates that the second HARQ feedback signal uses the first HARQ-ACK reporting mode.

[0424] As an example, the PDCCH indicates that the fourth HARQ feedback signal uses the first HARQ-ACK reporting mode.

[0425] As an example, the first HARQ-ACK reporting mode is ACK-NACK.

[0426] As an example, the first HARQ-ACK reporting mode feeds back ACK or NACK.

[0427] As an example, the second HARQ-ACK reporting mode only feeds back NACK.

[0428] As an example, in the second HARQ-ACK reporting mode, if the decoding is correct, no feedback is made.

[0429] As an example, in the second HARQ-ACK reporting mode, if the decoding is incorrect, NACK is fed back.

[0430] As an example, in the first HARQ-ACK reporting mode, if the decoding is correct, ACK is fed back.

[0431] As an example, in the first HARQ-ACK reporting mode, if the decoding is incorrect, NACK is fed back.

[0432] As an example, the harq-FeedbackEnablerMulticast in the first signaling indicates that the HARQ-ACK reporting mode is indicated by the PDCCH.

[0433] As a sub - embodiment of this embodiment, in the first monitoring, the HARQ - ACK mode indicated by the PDCCH is the first HARQ - ACK reporting mode.

[0434] As a sub - embodiment of this embodiment, in the second monitoring, the HARQ - ACK mode indicated by the PDCCH is the first HARQ - ACK reporting mode.

[0435] As an embodiment, the harq - FeedbackEnablerMulticast in the first signaling indicates that the HARQ - ACK reporting mode is the first HARQ - ACK reporting mode.

[0436] As an embodiment, the first signaling indicates that the first PUCCH uses ACK - NACK feedback.

[0437] As a sub - embodiment of this embodiment, the harq - FeedbackOptionMulticast in the first signaling indicates that the first PUCCH uses ACK - NACK feedback.

[0438] As an embodiment, the second PUCCH uses ACK - NACK feedback.

[0439] As an embodiment, the second node U02 does not indicate that the HARQ of the second PUCCH is disabled.

[0440] As an embodiment, the first PDSCH uses ACK - NACK feedback.

[0441] As an embodiment, the second node U02 does not indicate that the HARQ of the first PDSCH is disabled.

[0442] As an embodiment, the first HARQ feedback signal occupies the first PUCCH.

[0443] As an embodiment, the second HARQ feedback signal occupies the second PUCCH.

[0444] As an embodiment, the second HARQ feedback signal is for the first PDSCH.

[0445] As an embodiment, the first downlink transmission is sent through the first PDSCH.

[0446] As an embodiment, the HARQ for the PDSCH is in the ACK - NACK mode.

[0447] As an embodiment, the second signaling configures DRX.

[0448] As an embodiment, the second signaling configures a fifth timer.

[0449] As an embodiment, the fifth timer runs at the start of a first DRX cycle.

[0450] As an embodiment, the first DRX active time includes the running period of the fifth timer.

[0451] As an embodiment, the fifth timer is the drx-onDurationTimerPTM.

[0452] As an embodiment, the fifth timer starts at the start of each DRX cycle for multicast.

[0453] As an embodiment, the fifth timer starts at the start of each DRX cycle for the first RNTI.

[0454] As an embodiment, the start of the fifth timer is automatic.

[0455] As an embodiment, the start of the fifth timer is periodic.

[0456] As an embodiment, the start moment of the fifth timer depends on the configuration of the second signaling.

[0457] As an embodiment, the second signaling configures a sixth timer.

[0458] As an embodiment, the sixth timer runs at the start of a second DRX cycle.

[0459] As an embodiment, the second DRX active time includes the running period of the sixth timer.

[0460] As an embodiment, the sixth timer is the drx-onDurationTimer.

[0461] As an embodiment, the sixth timer starts at the start of each DRX cycle for multicast.

[0462] As an embodiment, the sixth timer starts at the start of each DRX cycle for the first RNTI.

[0463] As an embodiment, the start of the sixth timer is automatic.

[0464] As an embodiment, the start of the sixth timer is periodic.

[0465] As an example, the start time of the sixth timer depends on the configuration of the second signaling.

[0466] As an example, the start of the fifth timer and the sixth timer is not forced to be simultaneous.

[0467] As an example, the start of the fifth timer and the sixth timer is independent.

[0468] As an example, the fifth timer and the sixth timer can be started simultaneously or non-simultaneously.

[0469] As an example, the first DRX cycle is the DRX cycle for the first RNTI.

[0470] As an example, the second DRX cycle is the DRX cycle for the first DRX group.

[0471] As an example, the first DRX cycle and the second DRX cycle can be equal or unequal.

[0472] As an example, enabling HARQ feedback can be pre-configured.

[0473] As an example, enabling HARQ feedback can be fixed.

[0474] As an example, enabling HARQ feedback can be implemented according to requirements.

[0475] As an example, adopting the first HARQ-ACK reporting mode can be pre-configured.

[0476] As an example, adopting the first HARQ-ACK reporting mode can be fixed.

[0477] As an example, adopting the first HARQ-ACK reporting mode can be implemented according to requirements.

[0478] As an example, the second signaling configures the values of the first timer and the second timer, where the value configured for the first timer is less than the value configured for the second timer.

[0479] As an embodiment, the value of the first timer being less than the value of the second timer is conducive to shortening the delay of PTP or unicast transmission, and is conducive to avoiding retransmission of the current data packet before the next data packet is transmitted. For multicast services, the next data packet is for multiple terminals, and multicast services often have timeliness. Therefore, it is difficult to delay the next data packet. Completing the retransmission of the current data packet as soon as possible is conducive to improving the quality of service transmission and user satisfaction.

[0480] As an embodiment, step S5101 is earlier than step S5102.

[0481] As an embodiment, step S5101 is later than step S5102.

[0482] As an embodiment, step S5101 and step S5102 are received simultaneously.

[0483] As an embodiment, the first signaling and the second signaling belong to the same RRC message.

[0484] As a sub - embodiment of this embodiment, the same RRC message is RRCReconfiguration.

[0485] As an embodiment, step S5101 is earlier than steps S5103 to S5114.

[0486] As an embodiment, step S5102 is earlier than steps S5103 to S5114.

[0487] As an embodiment, step S5103 is earlier than step S5104.

[0488] As an embodiment, step S5104 is earlier than step S5105.

[0489] As an embodiment, step S5105 is earlier than step S5106.

[0490] As an embodiment, step S5106 is executed in the first OFDM symbol after step S5105.

[0491] As an embodiment, step S5106 is earlier than step S5107.

[0492] As an embodiment, step S5107 is earlier than step S5108.

[0493] As an embodiment, step S5108 is earlier than step S5109.

[0494] As an embodiment, step S5108 is earlier than step S5111.

[0495] As an example, step S5109 is executed before step S5110.

[0496] As an example, step S5111 is earlier than step S5112.

[0497] As an example, step S5112 is earlier than step S5113.

[0498] As an example, step S5113 is earlier than step S5114.

[0499] As an example, step S5111 is earlier than step S5114.

[0500] As an example, step S5112 is earlier than step S5114.

[0501] As an example, step S5107 is executed when the third timer is in a running state.

[0502] As an example, step S5107 is to receive a retransmission for the first bit block.

[0503] As an example, step S5107 is to receive a retransmission for the first downlink transmission.

[0504] As an example, step S5107 is to receive a retransmission for the first downlink multicast transmission by unicast or PTP.

[0505] As an example, step S5107 is to receive a retransmission for the first bit block by unicast or PTP.

[0506] As an example, step S5106 further includes stopping the third timer and stopping the fourth timer.

[0507] As an example, step S5112 further includes stopping the third timer and stopping the fourth timer.

[0508] As an example, after step S5106, the expiration of the first timer triggers the start of the third timer.

[0509] As an example, after step S5106, the expiration of the second timer triggers the start of the fourth timer.

[0510] As an example, the terminal U01 executes step S5103 during the operation of the DRX on duration or inactivity timer for the first RNTI.

[0511] As an example, during the execution of step S5103, the onduration timer for the first DRX group is not running.

[0512] As an example, during the execution of step S5103, the inactivity timer for the first DRX group is not running.

[0513] As an example, the fifth timer is periodically started.

[0514] As an example, the sixth timer is periodically started.

[0515] As an example, using the onduration timer in DRX is prior art.

[0516] As an example, using the inactivity timer in DRX is prior art.

[0517] As an example, the active time includes the running period of the corresponding onduration timer.

[0518] As a sub - example of this example, the active time applies to both the first DRX active time and the second DRX active time.

[0519] As an example, the active time includes the running period of the corresponding inactivity timer.

[0520] As a sub - example of this example, the active time applies to both the first DRX active time and the second DRX active time.

[0521] As an example, step S5110 means that the second timer has not received an intervention before expiration.

[0522] As an example, after step S5110, the terminal U01 monitors the PDCCH for the first RNTI during the running period of the fourth timer.

[0523] As a sub - example of this example, the first DRX active time includes the running period of the fourth timer after step S5110.

[0524] As an example, steps S5109 - S5110 and steps S5111 - S5114 do not exist simultaneously.

[0525] As an example, steps S5109 - S5110 exist and steps S5111 - S5114 do not exist.

[0526] As an embodiment, steps S5109 to S5110 do not exist, and steps S5111 to S5114 exist.

[0527] As an embodiment, step S5114 is executed immediately after step S5111, and the indication of receiving the first downlink transmission on the PDCCH in the second monitoring triggers the stop of the second timer.

[0528] As an embodiment, step S5114 is executed immediately after step S5112, and the reception of the first downlink transmission triggers the stop of the second timer.

[0529] As an embodiment, step S5114 is after step S5113, and the sending of the second HARQ feedback signal triggers the stop of the second timer.

[0530] As an embodiment, step S5114 is after step S5113, the second timer expires and the expiration of the second timer does not trigger the start of the fourth timer.

[0531] As an embodiment, the expiration of the second timer not triggering the start of the fourth timer includes: when receiving the first downlink transmission, the expiration of the second timer does not trigger the start of the fourth timer.

[0532] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0533] As a sub - embodiment of this embodiment, the first downlink transmission is a re - transmission performed by PTP or unicast.

[0534] As an embodiment, the expiration of the second timer not triggering the start of the fourth timer includes: when sending the second HARQ feedback signal, it is determined that the expiration of the second timer does not trigger the start of the fourth timer.

[0535] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0536] As a sub - embodiment of this embodiment, the first downlink transmission is a re - transmission performed by PTP or unicast.

[0537] As an embodiment, the first downlink transmission is not correctly decoded.

[0538] As an embodiment, the terminal U01, in response to sending the second HARQ feedback signal, starts the first timer.

[0539] As an example, in response to sending the second HARQ feedback signal, the terminal U01 only starts the former of the first timer and the second timer.

[0540] As an example, after step S5114, the terminal U01 receives the retransmission of the first downlink transmission only through PTP or unicast.

[0541] As an example, after step S5114, the terminal U01 receives the retransmission of the first bit block only through PTP or unicast.

[0542] As an example, after step S5114 and before receiving the next new transmission on the HARQ process identified by the first HARQ process number, the terminal U01 receives the retransmission on the HARQ process identified by the first HARQ process number only through PTP or unicast.

[0543] As an example, the advantages of the above method include reducing complexity, avoiding interference between PTP and PTM, and improving reception efficiency.

[0544] Example 6

[0545] Example 6 exemplifies a schematic diagram of the timing relationship according to an embodiment of the present application, as shown in the appendix Figure 6 as follows.

[0546] The appendix Figure 6 is used to show the timing relationship, where the first timer, the second timer, the third timer, and the fourth timer are all configurable, so the running times of these timers can be different in different configurations; in the scenario of the appendix Figure 6 the value of the first timer is less than the value of the second timer, that is, without intervention, the running time of the first timer is shorter than the running time of the second timer.

[0547] As an example, both the first timer and the second timer are timers for the process identified by the first HARQ process number.

[0548] As an example, both the third timer and the fourth timer are timers for the process identified by the first HARQ process number.

[0549] As an example, the value of the third timer is greater than the value of the fourth timer.

[0550] As an example, the value of the third timer is not greater than or less than the value of the fourth timer.

[0551] As an example, the value of the third timer is equal to the value of the fourth timer.

[0552] As an example, atta Figure 6 In which, the first timer and the second timer are started simultaneously.

[0553] As an example, atta Figure 6 In which, the first timer and the second timer are started within the same OFDM symbol.

[0554] As an example, the transmission of the first HARQ feedback signal triggers the start of the first timer.

[0555] As an example, the transmission of the first HARQ feedback signal triggers the start of the second timer.

[0556] As an example, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal is configurable.

[0557] As an example, the configuration of the PUCCH for the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal.

[0558] As an example, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal depends on the indication of the first downlink multicast transmission by the PDCCH in the first monitoring.

[0559] As an example, in atta Figure 6 In which, the start of the third timer is triggered by the expiration of the first timer.

[0560] As an example, in atta Figure 6 In which, the start of the fourth timer is triggered by the expiration of the second timer.

[0561] As an example, the first downlink multicast transmission is an initial transmission.

[0562] As an example, the terminal performs the third monitoring during the operation of the third timer.

[0563] As an example, the time for the third monitoring includes the operation period of the third timer.

[0564] As an example, the first DRX active time includes the operation period of the fourth timer.

[0565] As an example, during the operation of the fourth timer, the terminal monitors the PDCCH for the first RNTI.

[0566] As an example, the terminal's monitoring of the PDCCH for the first RNTI during the operation of the fourth timer wastes power, and simultaneously monitoring the PDCCH for the first RNTI and monitoring the PDCCH for the second RNTI easily causes unpredictable conflicts and chaos.

[0567] Example 7

[0568] Embodiment 7 exemplifies a schematic diagram of the timing relationship according to an embodiment of the present application, as shown in the appendix Figure 7 as follows.

[0569] The appendix Figure 7 is used to show the sequence of timing. Since the values of the first timer, the second timer, the third timer, and the fourth timer are all configurable, and the scheduling for the terminal or for the first RNTI is also dynamic, unless otherwise specified, the running time length of the timers in the appendix Figure 7 is not limited.

[0570] As an example, in the scenario of the appendix Figure 7 , the value of the first timer is less than the value of the second timer, that is, without intervention, the running time of the first timer is shorter than the running time of the second timer.

[0571] As an example, both the first timer and the second timer are timers for the process identified by the first HARQ process number.

[0572] As an example, both the third timer and the fourth timer are timers for the process identified by the first HARQ process number.

[0573] As an example, after sending the first HARQ feedback signal, the first timer and the second timer are started simultaneously.

[0574] As an example, within the first OFDM (Orthogonal Frequency Division Multiplexing) symbol after sending the first HARQ feedback signal, the first timer and the second timer are started simultaneously.

[0575] As an example, in the appendix Figure 7 , the first timer and the second timer are started within the same OFDM symbol.

[0576] As an example, the transmission of the first HARQ feedback signal triggers the start of the first timer.

[0577] As an example, the transmission of the first HARQ feedback signal triggers the start of the second timer.

[0578] As an example, the time interval between the first downlink multicast transmission and the transmission of the first HARQ feedback signal is configurable.

[0579] As an example, the configuration of the PUCCH is for the time interval between the first downlink multicast transmission and the transmission of the first HARQ feedback signal.

[0580] As an example, the time interval between the first downlink multicast transmission and the transmission of the first HARQ feedback signal depends on the indication of the first downlink multicast transmission by the PDCCH in the first monitoring.

[0581] As an example, in the appendix Figure 7 the start of the third timer is triggered by the expiration of the first timer.

[0582] As an example, in the appendix Figure 7 the start of the fourth timer is triggered by the expiration of the second timer.

[0583] As an example, the first downlink multicast transmission is an initial transmission.

[0584] As an example, the terminal performs the third monitoring during the running of the third timer.

[0585] As an example, the time for the third monitoring includes the running period of the third timer.

[0586] As an example, the first DRX active time includes the running period of the fourth timer.

[0587] As an example, in the appendix Figure 7 the terminal, during the running of the third timer, performs the second monitoring on the PDCCH for the second RNTI.

[0588] As an example, the second monitoring lasts for the running period of the third timer.

[0589] As an embodiment, the indication of receiving the first downlink transmission on the PDCCH in the second monitoring depends on dynamic scheduling, so there is no restriction on the exact time when the indication of receiving the first downlink transmission on the PDCCH in the second monitoring during the operation of the third timer.

[0590] As an embodiment, in the appendix Figure 7 the third timer is stopped.

[0591] As a sub - embodiment of this embodiment, when the terminal receives an indication for the first downlink transmission on the PDCCH in the second monitoring, it triggers the stop of the third timer.

[0592] As an embodiment, the exact time of receiving the first downlink transmission depends on receiving an indication for the first downlink transmission on the PDCCH in the second monitoring.

[0593] As an embodiment, the exact time of receiving the first downlink transmission depends on the time - frequency resources indicated for the first downlink transmission received on the PDCCH in the second monitoring.

[0594] As an embodiment, receiving the first downlink transmission is not earlier than receiving an indication for the first downlink transmission on the PDCCH in the second monitoring.

[0595] As an embodiment, when an indication for the first downlink transmission is received on the PDCCH in the second monitoring, the second timer is stopped.

[0596] As an embodiment, stopping the second timer when an indication for the first downlink transmission is received on the PDCCH in the second monitoring is beneficial for power saving, and at the same time is beneficial for potential conflicts between PTM and PTP transmissions and reduces complexity.

[0597] Example 8

[0598] Embodiment 8 exemplifies a schematic diagram of the timing relationship according to an embodiment of the present application, as shown in the appendix Figure 8 shown.

[0599] The appendix Figure 8 is used to show the sequence of timing. Since the values of the first timer, the second timer, the third timer and the fourth timer are all configurable, and the scheduling for the terminal or for the first RNTI is also dynamic, unless otherwise specified, the length of the running time of the timers in the appendix Figure 8 is not limited.

[0600] As an embodiment, in the appendix Figure 7In the scenario where the value of the first timer is less than the value of the second timer, that is, without intervention, the running time of the first timer is shorter than the running time of the second timer.

[0601] As an embodiment, both the first timer and the second timer are timers for the process identified by the first HARQ process number.

[0602] As an embodiment, both the third timer and the fourth timer are timers for the process identified by the first HARQ process number.

[0603] As an embodiment, after sending the first HARQ feedback signal, the first timer and the second timer are started simultaneously.

[0604] As an embodiment, within the first OFDM (Orthogonal Frequency Division Multiplexing) symbol after sending the first HARQ feedback signal, the first timer and the second timer are started simultaneously.

[0605] As an embodiment, atta Figure 8 chment, the first timer and the second timer are started within the same OFDM symbol.

[0606] As an embodiment, the sending of the first HARQ feedback signal triggers the start of the first timer.

[0607] As an embodiment, the sending of the first HARQ feedback signal triggers the start of the second timer.

[0608] As an embodiment, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal is configurable.

[0609] As an embodiment, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal is the configuration of PUCCH.

[0610] As an embodiment, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal depends on the indication of the first downlink multicast transmission by the PDCCH in the first monitoring.

[0611] As an embodiment, atta Figure 8 chment, the start of the third timer is triggered by the expiration of the first timer.

[0612] As an embodiment, atta Figure 8Among them, the start of the fourth timer is triggered by the expiration of the second timer.

[0613] As an embodiment, the first downlink multicast transmission is an initial transmission.

[0614] As an embodiment, the terminal performs the third monitoring during the running of the third timer.

[0615] As an embodiment, the time for the third monitoring includes the running period of the third timer.

[0616] As an embodiment, the first DRX active time includes the running period of the fourth timer.

[0617] As an embodiment, in the appendix Figure 8 Among them, the terminal, during the running of the third timer, performs the second monitoring on the PDCCH for the second RNTI.

[0618] As an embodiment, the second monitoring lasts for the running period of the third timer.

[0619] As an embodiment, the indication of receiving the first downlink transmission on the PDCCH during the second monitoring depends on dynamic scheduling, so there is no restriction on the exact moment of receiving the indication of the first downlink transmission on the PDCCH during the running of the third timer.

[0620] As an embodiment, in the appendix Figure 8 Among them, the third timer is stopped.

[0621] As a sub - embodiment of this embodiment, the terminal receives an indication for the first downlink transmission on the PDCCH during the second monitoring, which is used to trigger the stop of the third timer.

[0622] As an embodiment, the exact moment of receiving the first downlink transmission depends on receiving the indication for the first downlink transmission on the PDCCH during the second monitoring.

[0623] As an embodiment, the exact moment of receiving the first downlink transmission depends on the time - frequency resources indicated for the first downlink transmission received on the PDCCH during the second monitoring.

[0624] As an embodiment, receiving the first downlink transmission is not earlier than receiving the indication for the first downlink transmission on the PDCCH during the second monitoring.

[0625] As an embodiment, when receiving the first downlink transmission, the second timer is stopped.

[0626] As a sub - embodiment of this embodiment, receiving the first downlink transmission is used to determine that the second timer is stopped.

[0627] As a sub - embodiment of this embodiment, receiving an indication for the first downlink transmission on the PDCCH during the second monitoring determines that the second timer is stopped.

[0628] As an embodiment, when sending the second HARQ feedback signal, the second timer is stopped.

[0629] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0630] As a sub - embodiment of this embodiment, the second HARQ feedback signal indicates NACK.

[0631] As a sub - embodiment of this embodiment, receiving the first downlink transmission is used to determine that the second timer is stopped.

[0632] As a sub - embodiment of this embodiment, receiving an indication for the first downlink transmission on the PDCCH during the second monitoring determines that the second timer is stopped.

[0633] As a sub - embodiment of this embodiment, when the second HARQ feedback signal is NACK, it is used to determine that the second timer is stopped.

[0634] As an embodiment, in the above method, stopping the second timer is beneficial for power saving, and at the same time is beneficial for potential conflicts between PTM and PTP transmissions, avoiding complex solutions introduced to solve the above conflicts. Stopping the fourth timer when receiving the first downlink transmission or sending the second HARQ feedback is beneficial for stopping the fourth timer in the most necessary situation, thereby being beneficial for reducing complexity and improving reception performance.

[0635] Example 9

[0636] Embodiment 9 exemplifies a schematic diagram of the timing relationship according to an embodiment of the present application, as shown in the appendix Figure 9 as follows.

[0637] Appendix Figure 9 is used to show the sequence of timing. Since the values of the first timer, the second timer, the third timer, and the fourth timer are all configurable, and the scheduling for the terminal or for the first RNTI is also dynamic, unless otherwise specified, the running time length of the timers in the appendix Figure 9 is not limited.

[0638] As an embodiment, in the appendixFigure 9 In the scenario where the value of the first timer is less than the value of the second timer, that is, without intervention, the running time of the first timer is shorter than that of the second timer.

[0639] As an embodiment, both the first timer and the second timer are timers for the process identified by the first HARQ process number.

[0640] As an embodiment, both the third timer and the fourth timer are timers for the process identified by the first HARQ process number.

[0641] As an embodiment, after the first HARQ feedback signal is sent, the first timer and the second timer are started simultaneously.

[0642] As an embodiment, within the first OFDM (Orthogonal Frequency Division Multiplexing) symbol after the first HARQ feedback signal is sent, the first timer and the second timer are started simultaneously.

[0643] As an embodiment, attached Figure 9 wherein the first timer and the second timer are started within the same OFDM symbol.

[0644] As an embodiment, the sending of the first HARQ feedback signal triggers the start of the first timer.

[0645] As an embodiment, the sending of the first HARQ feedback signal triggers the start of the second timer.

[0646] As an embodiment, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal is configurable.

[0647] As an embodiment, the configuration of the PUCCH for the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal.

[0648] As an embodiment, the time interval between receiving the first downlink multicast transmission and sending the first HARQ feedback signal depends on the indication of the first downlink multicast transmission by the PDCCH in the first monitoring.

[0649] As an embodiment, in attached Figure 9 wherein the start of the third timer is triggered by the expiration of the first timer.

[0650] As an embodiment, in attachedFigure 9 In it, the start of the fourth timer is triggered by the expiration of the second timer.

[0651] As an embodiment, the first downlink multicast transmission is an initial transmission.

[0652] As an embodiment, the terminal performs the third monitoring during the running of the third timer.

[0653] As an embodiment, the time of the third monitoring includes the running period of the third timer.

[0654] As an embodiment, the first DRX active time includes the running period of the fourth timer.

[0655] As an embodiment, in Appendix Figure 9 In it, the terminal, during the running of the third timer, performs the second monitoring on the PDCCH for the second RNTI.

[0656] As an embodiment, the second monitoring lasts for the running period of the third timer.

[0657] As an embodiment, the indication of receiving the first downlink transmission on the PDCCH in the second monitoring depends on dynamic scheduling, so there is no limitation on the exact moment of receiving the indication of the first downlink transmission on the PDCCH in the second monitoring during the running of the third timer.

[0658] As an embodiment, in Appendix Figure 9 In it, the third timer is not intervened until it expires.

[0659] As a sub - embodiment of this embodiment, the terminal receives an indication for the first downlink transmission on the PDCCH in the second monitoring, which is used to determine whether the expiration of the second timer triggers the start of the fourth timer.

[0660] As an embodiment, the exact moment of receiving the first downlink transmission depends on the indication of receiving the first downlink transmission on the PDCCH in the second monitoring.

[0661] As an embodiment, the exact moment of receiving the first downlink transmission depends on the time - frequency resources indicated for the first downlink transmission received on the PDCCH in the second monitoring.

[0662] As an embodiment, receiving the first downlink transmission is not earlier than the indication of receiving the first downlink transmission on the PDCCH in the second monitoring.

[0663] As an embodiment, when the indication of the first downlink transmission is received on the PDCCH in the second monitoring, the expiration of the second timer does not trigger the start of the fourth timer.

[0664] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0665] As an embodiment, the expiration of the second timer not triggering the start of the fourth timer includes: when the first downlink transmission is received, the expiration of the second timer does not trigger the start of the fourth timer.

[0666] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0667] As an embodiment, the expiration of the second timer not triggering the start of the fourth timer includes: when the second HARQ feedback signal is NACK, the expiration of the second timer does not trigger the start of the fourth timer.

[0668] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0669] As an embodiment, whether the expiration of the second timer triggers the start of the fourth timer depends on whether an indication for the first downlink transmission is received on the PDCCH in the second monitoring.

[0670] As a sub - embodiment of this embodiment, when an indication for the first downlink transmission is received on the PDCCH in the second monitoring, the expiration of the second timer does not trigger the start of the fourth timer.

[0671] As a sub - embodiment of this embodiment, when an indication for the first downlink transmission is not received on the PDCCH in the second monitoring, the expiration of the second timer triggers the start of the fourth timer.

[0672] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0673] As an embodiment, whether the expiration of the second timer triggers the start of the fourth timer depends on whether the first downlink transmission is received.

[0674] As a sub - embodiment of this embodiment, when the first downlink transmission is received, the expiration of the second timer does not trigger the start of the fourth timer.

[0675] As a sub - embodiment of this embodiment, when the first downlink transmission is not received, the expiration of the second timer triggers the start of the fourth timer.

[0676] As a sub - embodiment of this embodiment, the first downlink transmission is not correctly decoded.

[0677] As an embodiment, the expiration of the second timer does not trigger the start of the fourth timer, which is simple to implement, beneficial to reducing power consumption, and at the same time beneficial to avoiding the complexity brought about when receiving PTP and PTM simultaneously.

[0678] Example 10

[0679] Embodiment 10 exemplifies a structural block diagram of a processing device in a terminal according to an embodiment of the present application; as shown in the appendix Figure 10 shown. In the appendix Figure 10 a processing device 1000 in a terminal includes a first receiver 1001 and a first transmitter 1002.

[0680] In Embodiment 10,

[0681] one or more processors and a memory;

[0682] The memory is coupled to the one or more processors, and the memory is used to store computer program code. The computer program code includes computer instructions, and the one or more processors call the computer instructions to cause the terminal to perform at least:

[0683] During a first DRX active time, perform a first monitoring of the PDCCH for a first RNTI, where the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is a first HARQ process number; receive the first downlink multicast transmission, where a first bit block generates the first downlink multicast transmission; wherein, the first downlink multicast transmission is not correctly decoded; the first DRX active time includes the running period of a fourth timer;

[0684] Send a first HARQ feedback signal; in response to sending the first HARQ feedback signal, start a first timer for the HARQ process identified by the first HARQ process number; in response to sending the first HARQ feedback signal, start a second timer for the HARQ process identified by the first HARQ process number; wherein, the expiration of the first timer triggers the start of a third timer; the first timer and the second timer are respectively HARQ timers of DRX; the third timer is a re - transmission timer of DRX; the second DRX active time includes the running period of the third timer;

[0685] During a second DRX active time, perform a second monitoring of the PDCCH for the second RNTI;

[0686] Wherein, the first RNTI includes at least one of a G-RNTI and a G-CS-RNTI; the second RNTI is a C-RNTI; the start of the fourth timer depends on whether an indication of a first downlink transmission is received on a PDCCH during the second monitoring, wherein the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; the start of the fourth timer depending on whether an indication of a first downlink transmission is received on a PDCCH during the second monitoring includes: stopping the second timer after an indication of a first downlink transmission is received on a PDCCH during the second monitoring, or the expiration of the second timer does not trigger the start of the fourth timer.

[0687] As an embodiment, the start of the fourth timer depending on whether an indication of a first downlink transmission is received on a PDCCH during the second monitoring includes: when an indication of a first downlink transmission is not received on a PDCCH during the second monitoring, the expiration of the second timer triggers the start of the fourth timer.

[0688] As an embodiment, the first receiver 1001 receives an indication of the first downlink transmission on a PDCCH during the second monitoring; wherein, stopping the second timer after an indication of a first downlink transmission is received on a PDCCH during the second monitoring includes: receiving an indication of a first downlink transmission on a PDCCH during the second monitoring triggers the stop of the second timer.

[0689] As an embodiment, the first receiver 1001 receives an indication of the first downlink transmission on a PDCCH during the second monitoring; receives the first downlink transmission; wherein, stopping the second timer after an indication of a first downlink transmission is received on a PDCCH during the second monitoring includes: receiving the first downlink transmission triggers the stop of the second timer.

[0690] As an embodiment, the first receiver 1001 receives an indication of the first downlink transmission on a PDCCH during the second monitoring; receives the first downlink transmission;

[0691] The first transmitter 1002 transmits a second HARQ feedback signal; in response to transmitting the second HARQ feedback signal, starts the first timer for the HARQ process identified by the first HARQ process number; stops at least the former of the third timer and the fourth timer;

[0692] Among them, stopping the second timer after receiving an indication of a first downlink transmission on the PDCCH in the second monitoring includes: the transmission of the second HARQ feedback signal triggers the stopping of the second timer.

[0693] As an embodiment, the first receiver 1001 receives a first signaling, and the first signaling indicates enabling HARQ feedback; a first HARQ-ACK reporting mode is used.

[0694] As an embodiment, the first receiver 1001 receives a second signaling, and the second signaling configures DRX, including configuring a fifth timer and a sixth timer;

[0695] Among them, the fifth timer runs at the start of a first DRX cycle; the sixth timer runs at the start of a second DRX cycle; the first DRX active time includes the running period of the fifth timer; the second DRX active time includes the running period of the sixth timer.

[0696] As an embodiment, the second signaling configures the values of the first timer and the second timer, where the configured value of the first timer is less than the configured value of the second timer.

[0697] As an embodiment, the first timer is drx-HARQ-RTT-TimerDL; the second timer is drx-HARQ-RTT-TimerDL-PTM; the third timer is drx-RetransmissionTimerDL; the fourth timer is drx-RetransmissionTimerDL-PTM.

[0698] As an embodiment, the terminal is a user equipment (UE).

[0699] As an embodiment, the terminal is a terminal supporting large time delay difference.

[0700] As an embodiment, the terminal is a terminal supporting NTN.

[0701] As an embodiment, the terminal is an aircraft or a ship.

[0702] As an embodiment, the terminal is a mobile phone or a vehicle-mounted terminal.

[0703] As an embodiment, the terminal is a terminal supporting multicast.

[0704] As an embodiment, the terminal is a terminal supporting MUSIM.

[0705] As an example, the terminal is an Internet of Things (IoT) terminal or an industrial IoT terminal.

[0706] As an example, the terminal is a device that supports low-latency and high-reliability transmission.

[0707] As an example, the first receiver 1001 includes at least one of the antenna 452, receiver 454, reception processor 456, multi-antenna reception processor 458, controller / processor 459, memory 460, or data source 467 in Example 4.

[0708] As an example, the first transmitter 1002 includes at least one of the antenna 452, transmitter 454, transmission processor 468, multi-antenna transmission processor 457, controller / processor 459, memory 460, or data source 467 in Example 4.

[0709] Those of ordinary skill in the art can understand that all or part of the steps in the above methods can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk, or an optical disc, etc. Optionally, all or part of the steps in the above examples can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above examples can be implemented in a hardware form or in the form of a software function module. This application is not limited to any specific form of the combination of software and hardware. The user equipment, terminal, and UE in this application include, but are not limited to, drones, communication modules on drones, remote control planes, aircraft, small airplanes, mobile phones, tablets, laptops, in-vehicle communication devices, wireless sensors, network cards, IoT terminals, RFID terminals, NB-IoT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, network cards, in-vehicle communication devices, low-cost mobile phones, low-cost tablets, satellite communication devices, vessel communication devices, NTN user equipment, and other wireless communication devices. The base station or system equipment in this application includes, but is not limited to, macrocell base stations, microcell base stations, home base stations, relay base stations, gNB (NR Node B) NR Node B, TRP (Transmitter Receiver Point), NTN base stations, satellite devices, flight platform devices, and other wireless communication devices.

[0710] The present invention may be implemented in other specific forms without departing from its core or essential features. Therefore, the presently disclosed embodiments should in any event be regarded as illustrative rather than restrictive. The scope of the invention is determined by the appended claims rather than the foregoing description, and all changes within the meaning and range of equivalents thereof are considered to be embraced therein.

Claims

1. A method in a terminal, characterized in that: include: performing a first monitoring of a PDCCH for a first RNTI during a first DRX active time, wherein the PDCCH indicates a first downlink multicast transmission and the HARQ process number of the first downlink multicast transmission is the first HARQ process number; receiving the first downlink multicast transmission, wherein a first bit block generates the first downlink multicast transmission; wherein the first downlink multicast transmission is not correctly decoded; and the first DRX active time includes a running period of a fourth timer; Sending a first HARQ feedback signal; as a response to sending the first HARQ feedback signal, starting a first timer for the HARQ process identified by the first HARQ process number; as a response to sending the first HARQ feedback signal, starting a second timer for the HARQ process identified by the first HARQ process number; wherein expiration of the first timer triggers the start of the third timer; the first timer and the second timer are respectively HARQ timers of DRX; the third timer is a retransmission timer of DRX; the second DRX active time includes the running period of the third timer; During a second DRX active time, performing a second monitoring on the PDCCH for the second RNTI; Among them, the first RNTI includes at least one of G-RNTI and G-CS-RNTI; the second RNTI is C-RNTI; the start of the fourth timer depends on whether an indication of a first downlink transmission is received on PDCCH in the second monitoring, wherein the HARQ process number of the first downlink transmission is the first HARQ process number and the first bit block generates the first downlink transmission; the start of the fourth timer depends on whether an indication of the first downlink transmission is received on PDCCH in the second monitoring, including: stopping the second timer after receiving an indication of the first downlink transmission on PDCCH in the second monitoring, or the expiration of the second timer does not trigger the start of the fourth timer.

2. The method in the terminal according to claim 1, characterized in that: The activation of the fourth timer depends on whether an indication of the first downlink transmission is received on the PDCCH in the second monitoring, including: when no indication of the first downlink transmission is received on the PDCCH in the second monitoring, expiration of the second timer triggers the activation of the fourth timer.

3. The method in the terminal according to claim 1 or 2, characterized in that: include: receiving an indication of the first downlink transmission on the PDCCH in the second monitoring; The stopping of the second timer after receiving an indication of the first downlink transmission on the PDCCH in the second monitoring includes: receiving an indication of the first downlink transmission on the PDCCH in the second monitoring triggers the stopping of the second timer.

4. The method in a terminal according to claim 1 or 2, characterized in that: include: receiving an indication of the first downlink transmission on the PDCCH in the second monitoring; receiving the first downlink transmission; The stopping of the second timer after receiving an indication of the first downlink transmission on the PDCCH in the second monitoring includes: the stopping of the second timer is triggered by the receiving of the first downlink transmission.

5. The method in the terminal according to claim 1 or 2, characterized in that: include: receiving an indication of the first downlink transmission on the PDCCH in the second monitoring; receiving the first downlink transmission; Sending a second HARQ feedback signal; as a response to sending the second HARQ feedback signal, starting the first timer for the HARQ process identified by the first HARQ process number; stopping at least the former of the third timer and the fourth timer; The stopping of the second timer after receiving an indication of the first downlink transmission on the PDCCH in the second monitoring includes: the sending of the second HARQ feedback signal triggers the stopping of the second timer.

6. The method in a terminal according to any one of claims 1 to 5, characterized in that: include: receiving a first signaling, where the first signaling indicates enabling HARQ feedback; The first HARQ-ACK reporting mode is used.

7. The method in a terminal according to any one of claims 1 to 6, characterized in that: include: receiving a second signaling, where the second signaling configures DRX, including configuring a fifth timer and a sixth timer; Among them, the fifth timer runs at the beginning of the first DRX cycle; the sixth timer runs at the beginning of the second DRX cycle; the first DRX active time includes the running period of the fifth timer; the second DRX active time includes the running period of the sixth timer.

8. The method in the terminal according to claim 7, characterized in that: The second signaling configures a value of the first timer and a value of the second timer, wherein the configured value of the first timer is smaller than the configured value of the second timer.

9. The method in a terminal according to any one of claims 1 to 7, characterized in that: The first timer is drx-HARQ-RTT-TimerDL; the second timer is drx-HARQ-RTT-TimerDL-PTM; the third timer is drx-RetransmissionTimerDL; and the fourth timer is drx-RetransmissionTimerDL-PTM.

10. A terminal, characterized in that: The terminal comprises: one or more processors and memory; The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions. The one or more processors call the computer instructions to enable the terminal to execute the method according to any one of claims 1 to 9.

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