Method and device for starting discontinuous reception retransmission timer, equipment and medium

Abstract

The invention provides a discontinuous reception (DRX) retransmission timer starting method and device, equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: receiving indication information; and according to the indication information, determining whether to start a DRX retransmission timer corresponding to a hybrid automatic repeat request (HARQ) process. In the invention, for the HARQ process of which the HARQ function is closed, the terminal can flexibly start the DRX retransmission timer corresponding to the HARQ used for transmitting data according to the indication information, and the purpose of saving power for the terminal can be achieved when the DRX retransmission timer is not started.

Description

[0001] This application is a divisional application of the PCT international patent application PCT / CN2020 / 121853 with an application date of October 19, 2020, which entered the Chinese national phase with Chinese patent application number 202080103888.5 and the invention name being "Method, device, equipment and medium for starting a discontinuous reception retransmission timer". Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a method, device, equipment and medium for starting a discontinuous reception retransmission timer. Background Art

[0003] DRX (Discontinuous Reception) is a mechanism that allows the terminal to periodically enter a dormant state and stop monitoring PDCCH (Physical Downlink Control Channel) scheduling information (or PDCCH subframes). In the DRX mechanism, the network device configures the terminal with DRX parameters, which are used to start the DRX timer. The DRX timer is used by the terminal to adjust the PDCCH monitoring duration to meet the service delay requirements when performing DRX.

[0004] In the New Radio (NR), after completing uplink transmission or completing HARQ process feedback for downlink transmission, the terminal will first start a DRX HARQ RTT Timer (DRX Hybrid Automatic Repeatrequest Round-Trip Time). The terminal is in a dormant state during the operation of the DRX HARQRTT Timer and does not monitor the PDCCH. After the timer expires, the terminal starts to monitor the uplink retransmission scheduling or determines whether to start monitoring the downlink retransmission scheduling based on the feedback.

[0005] Compared with the cellular network used by traditional NR, the signal propagation delay between the terminal and the satellite in NTN (Non-Terrestrial Network) is greatly increased. In order to ensure data transmission continuity without increasing the number of HARQ processes, the HARQ function can be turned on or off. For the downlink HARQ process with the HARQ feedback function turned off and the uplink HARQ process with the HARQ retransmission function turned off, there is no need to start the DRX HARQ RTT Timer. However, there is no conclusion yet on whether the terminal needs to start the DRX retransmission timer (DRX Retransmission Timer) during the process of monitoring PDCCH, and under what circumstances to start the DRX retransmission timer. Summary of the invention

[0006] The embodiment of the present application provides a method, apparatus, device and medium for starting a discontinuous reception retransmission timer, which can instruct a terminal to flexibly start or stop a DRX retransmission timer corresponding to a HARQ process. The technical solution is as follows:

[0007] On the one hand, a method for starting a DRX retransmission timer is provided, which is applied to a terminal, and the method includes:

[0008] receiving instruction information;

[0009] According to the indication information, it is determined whether to start the DRX retransmission timer corresponding to the HARQ process.

[0010] On the other hand, a method for starting a DRX retransmission timer is provided, which is applied to a network device, and the method includes:

[0011] Send indication information, where the indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process.

[0012] On the other hand, a device for starting a DRX retransmission timer is provided, the device comprising:

[0013] A receiving module, used for receiving instruction information;

[0014] The determination module is used to determine whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information.

[0015] On the other hand, a device for starting a DRX retransmission timer is provided, the device comprising:

[0016] A sending module is used to send an indication message, wherein the indication message is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process

[0017] On the other hand, a terminal is provided, the terminal comprising a processor and a memory, the memory storing at least one instruction, the at least one instruction being used to be executed by the processor to implement the method for starting the DRX retransmission timer described in any one of the above aspects.

[0018] On the other hand, a network device is provided, comprising a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the method for starting the DRX retransmission timer described in any one of the above aspects.

[0019] On the other hand, a computer-readable storage medium is provided, on which instructions are stored, and when the instructions are executed by a processor, the method for starting the DRX retransmission timer described in any of the above aspects is implemented.

[0020] On the other hand, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method for starting a DRX retransmission timer as described in any one of the above aspects.

[0021] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0022] In the embodiment of the present application, for a HARQ process with a HARQ function turned off, the terminal can determine whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information. In this way, the terminal can flexibly start the DRX retransmission timer corresponding to the HARQ used for transmitting data, and when it is not started, the purpose of saving power for the terminal can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of a DRX cycle provided by an exemplary embodiment of the present application;

[0025] Figure 2 is a schematic diagram of another DRX cycle provided by an exemplary embodiment of the present application;

[0026] Figure 3 is a schematic diagram of a communication system provided by an exemplary embodiment of the present application;

[0027] Figure 4is a flowchart of a method for starting a DRX retransmission timer provided by an exemplary embodiment of the present application;

[0028] Figure 5 is a schematic diagram of starting a DRX timer according to first indication information provided by an exemplary embodiment of the present application;

[0029] Figure 6 is a schematic diagram of another method of starting a DRX timer according to first indication information provided by an exemplary embodiment of the present application;

[0030] Figure 7 is a schematic diagram of starting a DRX timer according to second indication information provided by an exemplary embodiment of the present application;

[0031] Figure 8 is a schematic diagram of another method of starting a DRX timer according to second indication information provided by an exemplary embodiment of the present application;

[0032] Fig. 9 is a flowchart of a method for starting a DRX retransmission timer shown in another exemplary embodiment of the present application;

[0033] Fig.10 is a flowchart of a method for starting a DRX retransmission timer shown in yet another exemplary embodiment of the application;

[0034] Fig.11 It is a structural schematic diagram of a device for starting a DRX retransmission timer shown in an exemplary embodiment of the present application;

[0035] Fig.12 is a structural schematic diagram of a device for starting a DRX retransmission timer shown in another exemplary embodiment of the present application;

[0036] Fig.13 It is a structural diagram of a communication device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0038] Before introducing in detail the method for starting the discontinuous reception DRX retransmission timer provided in the embodiment of the present application, a brief introduction to the relevant terms and implementation environment involved in the embodiment of the present application is first given.

[0039] First, the relevant terms involved in this application are briefly introduced.

[0040] 1. NTN system

[0041] NTN (Non-Terrestrial Network) generally uses satellite communication to provide communication services to ground users. Compared with the cellular network communication of the ground NR (New Radio) system, satellite communication has many unique advantages. First, satellite communication is not limited by the user's geographical location. For example, general terrestrial communication cannot cover areas such as oceans, mountains, deserts, etc. where communication equipment cannot be set up, or areas that are not covered by communication due to sparse population. For satellite communication, since a satellite can cover a large area of ​​land, and the satellite can orbit the earth, in theory every corner of the earth can be covered by satellite communication. Secondly, satellite communication has great social value. Satellite communication can cover remote mountainous areas, poor and backward countries or regions at a low cost, so that people in these areas can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital divide with developed areas and promoting the development of these areas. Thirdly, satellite communication has a long distance, and the cost of communication does not increase significantly as the communication distance increases. Finally, satellite communication is highly stable and is not restricted by natural disasters.

[0042] According to the different orbital altitudes, communication satellites are divided into LEO (Low-Earth Orbit) satellites, MEO (Medium-Earth Orbit) satellites, GEO (Geostationary Earth Orbit) satellites and HEO (High Elliptical Orbit) satellites, etc. At present, the main research is on LEO satellites and GEO satellites.

[0043] Among them, the LEO satellite altitude ranges from 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours. The round-trip delay of signal propagation for single-hop communication between users is generally less than 20ms. The maximum satellite visibility time is 20 minutes. The signal propagation distance is short, the link loss is small, and the transmission power requirement for user terminals is not high.

[0044] The orbital altitude of GEO satellites is 35786km, and the rotation period around the earth is 24 hours. The round-trip delay of signal propagation in single-hop communication between users is generally 250ms.

[0045] In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground. A satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0046] 2. DRX mechanism

[0047] In the DRX mechanism, the terminal is configured with a DRX cycle. Figure 1 , shows a schematic diagram of the DRX cycle, which consists of "Active State (On Duration)" and "Sleeping State (Opportunity for DRX)". During the active state, the terminal monitors and receives PDCCH scheduling information; during the "Sleeping State" time, the terminal does not monitor the data of the downlink channel to save power consumption. Figure 1 It can be seen that in the time domain, time is divided into continuous DRX cycles. When a scheduling message is received in the active state, the terminal starts a "DRX Inactivity Timer" and monitors the PDCCH scheduling information at each PDCCH monitoring opportunity during the period; if the DRX Inactivity Timer is running, then even if the originally configured DRX Continuous Timer has timed out, the terminal still needs to continue to monitor the PDCCH until the DRX Inactivity Timer times out.

[0048] A DRX cycle is equal to the sum of the UE's wake-up time and sleep time. The wake-up time is the duration of the active state within a cycle, and the sleep time is the duration of the sleep state within a cycle. In the communication system, the system can configure short cycles for terminals according to different service scenarios, such as Figure 1 As shown, or long cycle, such as Figure 2 As shown. The sleep period of a long cycle is longer than that of a short cycle, or in other words, the sleep duration of a long cycle accounts for a larger proportion than the sleep duration of a short cycle. After the DRX inactive timer times out, if the terminal is configured with a short cycle, the terminal enters the short cycle, otherwise it enters the long cycle. For scenarios with a short cycle configured, after the DRX inactive timer times out, the behavior of the terminal entering the short cycle is usually because the network sends a series of small data packets after sending a large data packet, such as non-real-time services such as web browsing, downloading a main page followed by downloading a series of small objects. Therefore, the short cycle can be considered a highly active state.

[0049] DRX is configured with DRX parameters, which are semi-statically configured according to high-level signaling and are parameters of each Media Access Control (MAC) entity. DRX parameters are used to start DRX timers, which include DRX On Duration Timer, DRX Inactive Timer, DRX Short Cycle Timer, DRX Retransmission Timer, and DRX Hybrid Automatic Repeat request Round-Trip Time (DRX HARQ RTT Timer).

[0050] 3. HARQ mechanism of NR system

[0051] HARQ (Hybrid Automatic Repeat Request) is a technology that combines FEC (Forward Error Correction) and ARQ (Automatic Repeat-reQuest). FEC technology is used at the receiving end to correct the correctable part of all errors. Error detection is used to determine the data packets that cannot be corrected. Data packets that cannot be corrected are discarded, and the transmitter is requested to resend the same data packet.

[0052] There are two levels of retransmission mechanisms in the NR system: the HARQ mechanism of the MAC (Medium Access Control) layer and the ARQ mechanism of the RLC (Radio Link Control) layer. The retransmission of lost or erroneous data is mainly handled by the HARQ mechanism of the MAC layer, and supplemented by the retransmission function of the RLC layer. The HARQ mechanism of the MAC layer can provide fast retransmission, and the ARQ mechanism of the RLC layer can provide reliable data transmission.

[0053] The HARQ process uses a stop-and-wait protocol to send data. In the stop-and-wait protocol, after the sender sends a data TB (Transmission Block), it stops and waits for confirmation information. In this way, the sender stops and waits for confirmation after each transmission, which will result in very low user throughput. Therefore, multiple parallel HARQ processes are used in the NR system. When a HARQ process is waiting for confirmation information, the sender can use another HARQ process to continue sending data. These HARQ processes together form a HARQ entity, which combines the stop-and-wait protocol to allow continuous data transmission. HARQ is divided into uplink HARQ and downlink HARQ. Uplink HARQ is for uplink data transmission, and downlink HARQ is for downlink data transmission, and the two are independent of each other.

[0054] Based on the current NR protocol regulations, the terminal device has its own HARQ entity for each service cell. Each HARQ entity maintains a set of parallel downlink HARQ processes and a set of parallel uplink HARQ processes. Among them, in order to distinguish multiple HARQ processes, each HARQ process corresponds to a HARQ process number. For example, the HARQ process number can be a HARQ process ID (Identity Document), which is used to uniquely identify a HARQ process. The terminal device can determine the HARQ process used to transmit data based on the process number of the HARQ process.

[0055] 4. Resource Scheduling and Configuration Authorization

[0056] The 5G NR standard supports two resource scheduling methods: dynamic resource scheduling and semi-static resource scheduling.

[0057] Dynamic resource scheduling means that the network device sends an uplink scheduling grant (UL grant) to the terminal device. The UL grant contains the time-frequency domain resources occupied by the scheduled uplink data channel. The terminal device will send uplink data on the indicated time-frequency resources according to the instructions of the UL grant.

[0058] Semi-static resource scheduling means that the network device sends semi-static configuration signaling to the terminal device. The semi-static configuration signaling contains the time-frequency domain resources occupied by the scheduled uplink data channel. Semi-static resource scheduling is divided into two types in the NR standard. Type 1 is that the network device semi-statically configures a periodic uplink data channel for the terminal device at the wireless resource control layer to transmit data. Type 2 is that the network device semi-statically configures a periodic uplink data channel for the terminal device at the wireless resource control layer to transmit data, but it requires downlink control information from the physical layer to activate it. Among them, the semi-static configuration signaling is also used to indicate that the uplink data adopts a repeated transmission mode. Within one cycle, the terminal device can repeatedly send the same data transmission block on the configured uplink data channel.

[0059] In order to better serve periodic services, the NR system introduces the concept of pre-configured resources. Network equipment can pre-configure the resources required for uplink data transmission of terminal devices through RRC (Radio Resource Control) signaling in a semi-static resource allocation manner, that is, pre-configured transmission resources, such as downlink SPS (Semi-Persistent Scheduling) resources and uplink CG (Configured Grant) resources. The configured transmission resources can appear periodically, and the terminal device does not need to obtain a scheduling authorization before each downlink transmission and uplink transmission.

[0060] For each terminal, the network device configures a limited number of HARQ processes for it. When the configured first HARQ process is used to transmit the MAC PDU (Protocol Data Unit) corresponding to the first transmission resource, the MAC PDU is stored in the buffer area of ​​the first HARQ process. When the network device schedules the first HARQ process to transmit the data packet corresponding to the second transmission resource, the MAC PDU corresponding to the second transmission resource is stored in the buffer area of ​​the first HARQ process, and the MAC PDU corresponding to the first transmission resource is cleaned.

[0061] Next, the implementation environment involved in the embodiments of the present application is briefly introduced.

[0062] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: GSM (Global System of Mobile communication) system, CDMA (Code Division Multiple Access) system, WCDMA (Wideband Code Division Multiple Access) system, GPRS (General Packet Radio Service), LTE (Long Term Evolution) system, FDD (Frequency Division Duplex) system, TDD (Time Division Duplex) system, LTE-A (Advanced Long Term Evolution) system, NR system, NR system evolution system, LTE-U (LTE-based access to unlicensed spectrum) system, NR-U (NR-based access to unlicensed spectrum) system, UMTS (Universal Mobile Telecommunication System), WiMAX (Worldwide interoperability for Microwave Access) communication system, WLAN (Wireless Local Area Network) system. Networks, wireless local area networks), WiFi (Wireless Fidelity), next generation communication systems or other communication systems, etc.

[0063] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, D2D (Device to Device) communication, M2M (Machine to Machine) communication, MTC (Machine Type Communication), and V2V (Vehicle to Vehicle) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0064] The system architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0065] For example, the communication system 300 used in the embodiment of the present application is as follows: Figure 3 As shown. The communication system 300 may include a network device 310, which may be a device that communicates with a terminal 320 (or referred to as a communication terminal, user equipment). The network device 310 may provide communication coverage for a specific geographic area and may communicate with terminals located in the coverage area. Optionally, the network device 310 may be a satellite in an NTN system.

[0066] The communication system 300 further includes at least one terminal 320 located within the coverage area of ​​the network device 310. Optionally, the terminals 320 may perform D2D communication with each other.

[0067] Figure 3 One network device and two terminals are shown exemplarily. Optionally, the communication system 300 may include multiple network devices and each network device may include another number of terminals within its coverage area, which is not limited in the embodiments of the present application.

[0068] After introducing the relevant terms and implementation environment involved in the embodiments of the present application, the method for starting the discontinuous reception DRX retransmission timer provided in the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0069] Please refer to Figure 4 , Figure 4 is a flowchart of a method for starting a DRX retransmission timer shown in an exemplary embodiment of the present application, which can be applied to the above Figure 3 In the terminal 320 in the communication system shown, the method may include at least part of the following contents:

[0070] Step 410: Receive instruction information.

[0071] The indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process that disables the HARQ function.

[0072] In a possible implementation, the indication information is specifically first indication information, and the first indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the downlink HARQ process for which the HARQ feedback function is disabled.

[0073] In another possible implementation, the indication information is specifically second indication information, and the second indication information is used to indicate whether the terminal starts a DRX retransmission timer corresponding to an uplink HARQ process with a HARQ retransmission function disabled for the uplink HARQ process.

[0074] It should be noted that the indication information can be sent to the terminal by the network device in a semi-static configuration manner, or can be sent to the terminal in a dynamic configuration manner, and the embodiments of the present application do not impose any restrictions on this.

[0075] When semi-static configuration is adopted, the indication information may be carried in a system message, RRC dedicated signaling or MAC CE (Medium Access Control Control Element).

[0076] When dynamic configuration is adopted, the indication information may be carried in a PDCCH used to indicate scheduling of initial transmission or retransmission.

[0077] In addition, when the indication information is the first indication information, it can be effective for both the case where the downlink transmission is dynamically scheduled and the case where the SPS transmission is performed; it can also be effective only for the case where the downlink transmission is dynamically scheduled; it can also be effective only for the case where the downlink transmission is an SPS transmission, and the embodiments of the present application do not impose any restrictions on this.

[0078] If the first indication information is effective only when the downlink transmission is SPS transmission, the first indication information may be carried in the PDCCH for activating SPS.

[0079] When the indication information is the second indication information, it can be effective for both the cases where the uplink transmission is dynamically scheduled and the case where the uplink transmission is CG transmission; it can also be effective only for the case where the uplink transmission is dynamically scheduled; it can also be effective only for the case where the uplink transmission is CG transmission, and the embodiments of the present application do not impose any restrictions on this.

[0080] If the second indication information is only effective when the uplink transmission is a CG transmission, the second indication information may be carried in the PDCCH used to activate the second type CG.

[0081] Step 420: Determine whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information.

[0082] Because the indication information may be the first indication information or the second indication information, next, the process of determining whether to start the DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information in downlink transmission is explained.

[0083] Among them, starting the DRX retransmission timer corresponding to the downlink HARQ process includes the following three situations:

[0084] The first case is: when a PDCCH for indicating scheduling of downlink initial transmission is received, and the HARQ process used for the downlink transmission corresponding to the downlink initial transmission is a HARQ process with the HARQ feedback function turned off, it is determined whether to start the DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information.

[0085] The second situation is: when a PDCCH for indicating scheduling downlink retransmission is received, and the HARQ process used for the downlink transmission corresponding to the downlink retransmission is a HARQ process with the HARQ feedback function turned off, it is determined whether to start the DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information.

[0086] The third situation is: when the downlink initial transmission (data) is received on the downlink authorized resources, and the HARQ process used for the downlink transmission corresponding to the downlink initial transmission is a HARQ process with the HARQ feedback function turned off, it is determined whether to start the DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information.

[0087] Based on the above three situations, the process in which the terminal determines whether to start the DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information includes the following situations.

[0088] (1) If the first indication information is used to indicate that a DRX retransmission timer corresponding to a downlink HARQ process with a HARQ feedback function disabled is not started, the terminal stops the DRX retransmission timer corresponding to each downlink HARQ process with a HARQ feedback function disabled according to the first indication information.

[0089] (2) When downlink transmission is dynamically scheduled, there are two possible implementations.

[0090] In one possible implementation, if the first indication information is used to indicate that a DRX retransmission timer corresponding to a downlink HARQ process with a HARQ feedback function turned off is started, the terminal starts or restarts the DRX retransmission timer corresponding to the downlink HARQ process when receiving the PDCCH based on the first indication information.

[0091] In another possible implementation, if the first indication information is used to indicate that a DRX retransmission timer corresponding to a downlink HARQ process with a HARQ feedback function turned off is started, the terminal stops the DRX retransmission timer corresponding to the downlink HARQ process when receiving the PDCCH according to the first indication information, and starts the DRX retransmission timer corresponding to the downlink HARQ process after receiving the PDSCH (Physical Downlink Shared Channel) indicated by the PDCCH.

[0092] (3) In the case where the downlink transmission is SPS transmission scheduling, if the first indication information is used to indicate that a DRX retransmission timer corresponding to a downlink HARQ process with a HARQ feedback function turned off is started, the terminal starts the DRX retransmission timer corresponding to the downlink HARQ process after receiving the PDSCH indicated by the PDCCH according to the first indication information.

[0093] It should be noted that the first indication information may be sent to the terminal by the network device using a semi-static configuration, or may be sent to the terminal by the network device using a dynamic configuration, and the embodiment of the present application does not impose any restrictions on this.

[0094] For example, for the above situation (1), the first indication information may be sent by the network device to the terminal in a semi-static indication manner. For the above situations (2) and (3), the first indication information may be sent by the network device to the terminal in a dynamic indication manner.

[0095] As an example, see Figure 5 , Figure 5 This is a schematic diagram of starting a DRX timer according to first indication information provided by an exemplary embodiment of the present application. The first indication information is sent by a network device to a terminal in a semi-static configuration manner, assuming that the downlink HARQ process of the transmission data indicated by the network device through PDCCH scheduling is: HARQ ID0 and HARQ ID1.

[0096] In one implementation, Figure 5 At time t1 shown, the network device sends first indication information to the terminal. The first indication information is sent in a semi-static configuration manner, and the first indication information instructs the terminal to start a DRX retransmission timer for a HARQ process with a HARQ feedback function disabled.

[0097] According to the first indication information, when the PDCCH indicates to use the PDSCH of HARQ ID0 to receive downlink data, the terminal starts the DRX retransmission timer corresponding to HARQ ID0. At the same time, when the PDCCH indicates to use the PDSCH of HARQ ID1 to receive downlink data, the terminal starts the DRX retransmission timer corresponding to HARQ ID0.

[0098] It should be noted that before receiving the first indication information instructing the terminal not to start the DRX retransmission timer for the HARQ process that turns off the HARQ feedback function, or before the semi-statically configured period ends, the terminal will start the DRX retransmission timer corresponding to the downlink HARQ process each time the PDCCH indicates that the PDSCH of the HARQ process receives downlink data.

[0099] In another implementation, that is, in Figure 5 At time t2 shown, the network device sends first indication information to the terminal. The first indication information is sent in a semi-static configuration manner, and the first indication information indicates that the DRX retransmission timer is not started for the HARQ process with the HARQ feedback function turned off.

[0100] According to the first indication information, when the PDCCH indicates to use the PDSCH of HARQ ID0 and HARQ ID1 to receive downlink data, the terminal does not start the DRX retransmission timer corresponding to HARQ ID0 and HARQ ID1.

[0101] When the first indication information is received, if the DRX retransmission timer corresponding to HARQ ID0 and HARQ ID1 is in a running state, the DRX retransmission timer corresponding to HARQ ID0 and HARQ ID1 is stopped.

[0102] Similarly, before receiving the first indication information instructing the terminal to start the DRX retransmission timer for the HARQ process that turns off the HARQ feedback function, or before the end of the semi-statically configured period, the terminal will turn off the DRX retransmission timer corresponding to each downlink HARQ process each time the PDCCH indicates that the PDSCH of the HARQ process receives downlink data.

[0103] It should be noted that the above example only takes HARQ ID0 and HARQ ID1 as examples. In the actual process of receiving downlink data, the network device can configure multiple parallel downlink HARQ processes for the terminal, and the embodiments of the present application do not limit this.

[0104] As another example, see Figure 6 , Figure 6This is another schematic diagram of starting a DRX timer according to first indication information provided by an exemplary embodiment of the present application. The first indication information is sent to the terminal by a network device in a dynamic configuration manner, and the first indication information is carried in the PDCCH. It is assumed that the downlink HARQ process of the transmission data indicated by the network device through PDCCH scheduling is: HARQ ID0 and HARQ ID1.

[0105] exist Figure 6 At time t1 shown, the network device instructs the terminal through PDCCH to use PDSCH of HARQ ID0 to receive downlink data, and the PDCCH carries first indication information, which instructs the terminal to start the DRX retransmission timer for the HARQ process with the HARQ feedback function turned off.

[0106] Then, according to the first indication information, when the PDCCH indicates to use the PDSCH of HARQ ID0 to receive downlink data, the terminal starts the DRX retransmission timer corresponding to HARQ ID0.

[0107] exist Figure 6 At time t2 shown, the network device instructs the terminal through PDCCH to use PDSCH of HARQ ID1 to receive downlink data, and the PDCCH carries first indication information, which instructs the terminal not to start the DRX retransmission timer for the HARQ process with the HARQ feedback function turned off.

[0108] Then, according to the first indication information, when the PDCCH indicates to use the PDSCH of HARQ ID1 to receive downlink data, the terminal does not start the DRX retransmission timer corresponding to HARQ ID1.

[0109] exist Figure 6 At time t3 shown, the network device instructs the terminal through PDCCH to use PDSCH of HARQ ID1 to receive downlink data, and the PDCCH carries first indication information, which instructs the terminal to start the DRX retransmission timer for the HARQ process with the HARQ feedback function turned off.

[0110] Then, according to the first indication information, when the PDCCH indicates that the PDSCH of HARQ ID1 receives downlink data, the terminal starts the DRX retransmission timer corresponding to HARQ ID0.

[0111] It should be noted that when the PDCCH indicates that the terminal uses the PDSCH of the HARQ process to receive downlink data, the terminal determines whether to start the DRX retransmission timer corresponding to the HARQ process according to the first indication information carried in the PDCCH. That is, each PDCCH sent by the network device carries the first indication information, and the difference between the PDCCHs received at different times is only whether the carried first indication information instructs the terminal to start the DRX retransmission timer or instructs the terminal not to start the DRX retransmission timer.

[0112] Based on the above Figure 5 and Figure 6 In the method of starting the DRX retransmission timer according to the first indication information shown, the running time of the DRX retransmission timer can be pre-configured by the network device, and the embodiment of the present application does not impose any restrictions on this.

[0113] Next, the process of determining whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information in uplink transmission is explained.

[0114] Similarly, starting the DRX retransmission timer corresponding to the uplink HARQ process includes the following three situations:

[0115] The first case is: when a PDCCH for indicating scheduling of an uplink initial transmission is received, and the HARQ process used for the uplink transmission corresponding to the uplink initial transmission is a HARQ process with the HARQ retransmission function disabled, it is determined whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information.

[0116] The second situation is: when a PDCCH for indicating scheduling of uplink retransmission is received, and the HARQ process used for the uplink transmission corresponding to the uplink retransmission is a HARQ process with the HARQ retransmission function turned off, it is determined whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information.

[0117] The third situation is: when the uplink initial transmission (data) is sent on the uplink authorized resources, and the HARQ process used for the uplink transmission corresponding to the uplink initial transmission is a HARQ process with the HARQ retransmission function turned off, it is determined whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information.

[0118] Based on the above three situations, the process in which the terminal determines whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information includes the following situations.

[0119] (1) If the second indication information is used to indicate that the DRX retransmission timer corresponding to the uplink HARQ process with the HARQ retransmission function disabled is not started, the terminal stops the DRX retransmission timer corresponding to each uplink HARQ process with the HARQ retransmission function disabled according to the second indication information.

[0120] (2) When uplink transmission is dynamically scheduled, there are two possible implementations.

[0121] In one possible implementation, if the second indication information is used to indicate that the DRX retransmission timer corresponding to the uplink HARQ process is started for an uplink HARQ process with the HARQ retransmission function turned off, the terminal starts or restarts the DRX retransmission timer corresponding to the uplink HARQ process when receiving the PDCCH based on the second indication information.

[0122] In another possible implementation, if the second indication information is used to indicate the start of the DRX retransmission timer corresponding to the uplink HARQ process for the uplink HARQ process with the HARQ retransmission function turned off, the terminal stops the DRX retransmission timer corresponding to the uplink HARQ process when receiving the PDCCH according to the second indication information, and starts the DRX retransmission timer corresponding to the uplink HARQ process after receiving the PUSCH (Physical Uplink Shared Channel) indicated by the PDCCH.

[0123] (3) In the case where the uplink transmission is CG transmission scheduling, if the second indication information is used to indicate the start of the DRX retransmission timer corresponding to the uplink HARQ process for the uplink HARQ process with the HARQ retransmission function turned off, the terminal starts the DRX retransmission timer corresponding to the uplink HARQ process after completing the first retransmission on the PUSCH indicated by the PDCCH according to the second indication information.

[0124] It should be noted that the second indication information may be sent to the terminal by the network device using a semi-static configuration, or may be sent to the terminal by the network device using a dynamic configuration, and the embodiment of the present application does not impose any restrictions on this.

[0125] For example, for the above situation (1), the second indication information may be sent by the network device to the terminal in a semi-static indication manner. For the above situations (2) and (3), the second indication information may be sent by the network device to the terminal in a dynamic indication manner.

[0126] As an example, see Figure 7 , Figure 7This is a schematic diagram of starting a DRX timer according to second indication information provided by an exemplary embodiment of the present application. The second indication information is sent to the terminal by a network device in a semi-static configuration manner, assuming that the uplink HARQ process of the transmission data indicated by the network device through PDCCH scheduling is: HARQ ID0 and HARQ ID1.

[0127] In one implementation, Figure 7 At the time t1 shown, the network device sends second indication information to the terminal. The second indication information is sent in a semi-static configuration manner, and the second indication information indicates to start the DRX retransmission timer for the HARQ process with the HARQ retransmission function disabled.

[0128] According to the first indication information, after the PDCCH indicates that the first retransmission is completed on the PUSCH of HARQ ID0, the terminal starts the DRX retransmission timer corresponding to HARQ ID0. At the same time, after the PDCCH indicates that the first retransmission is completed on the PUSCH of HARQ ID1, the terminal starts the DRX retransmission timer corresponding to HARQ ID1.

[0129] It should be noted that, if the terminal does not receive an instruction to turn off the HARQ retransmission function for the HARQ process, the DRX retransmission timer will not be started, or before the semi-static configuration period ends, the terminal will start the DRX retransmission timer corresponding to the uplink HARQ process each time the PDCCH indicates that the PUSCH of the HARQ process has completed retransmission.

[0130] In another implementation, that is, in Figure 7 At the time t2 shown, the network device sends second indication information to the terminal, the second indication information is sent in a semi-static configuration manner, and the second indication information indicates that for the HARQ process with the HARQ retransmission function turned off, the DRX retransmission timer is not started.

[0131] According to the second indication information, after the PDCCH indicates that the PDSCH using HARQ ID0 and HARQ ID1 completes data retransmission, the terminal does not start the DRX retransmission timer corresponding to HARQ ID0 and HARQ ID1.

[0132] When the second indication information is received, if the DRX retransmission timer corresponding to HARQ ID0 and HARQ ID1 is in a running state, the DRX retransmission timer corresponding to HARQ ID0 and HARQ ID1 is stopped.

[0133] Similarly, before receiving an instruction to disable the HARQ retransmission function for the HARQ process, the terminal starts the DRX retransmission timer, or before the semi-statically configured period ends, the terminal will turn off the DRX retransmission timer corresponding to each uplink HARQ process each time the PDCCH instructs the terminal to retransmit data for the PUSCH of the HARQ process.

[0134] It should be noted that the above examples only take HARQ ID0 and HARQ ID1 as examples. In the actual process of receiving data, the network device can configure multiple parallel uplink HARQ processes for the terminal, and the embodiments of the present application do not limit this.

[0135] As another example, see Figure 8 , Figure 8 This is another schematic diagram of starting a DRX timer according to second indication information provided by an exemplary embodiment of the present application. The second indication information is sent to the terminal by a network device in a dynamic configuration manner, and the second indication information is carried in the PDCCH. It is assumed that the uplink HARQ process of the transmission data indicated by the network device through PDCCH scheduling is: HARQ ID0 and HARQ ID1.

[0136] exist Figure 8 At time t1 shown, the network device instructs the terminal to retransmit uplink data using the PUSCH of HARQ ID0 through the PDCCH, and the PDCCH carries second indication information, which indicates to start the DRX retransmission timer for the HARQ process with the HARQ retransmission function turned off.

[0137] Then, according to the second indication information, after the PDCCH indicates that the first retransmission is completed on the PUSCH of HARQ ID0, the terminal starts the DRX retransmission timer corresponding to HARQ ID0.

[0138] exist Figure 8 At time t2 shown, the network device instructs the terminal to retransmit uplink data using the PUSCH of HARQ ID1 through the PDCCH, and the PDCCH carries second indication information, which indicates that for the HARQ process with the HARQ retransmission function turned off, the DRX retransmission timer is not started.

[0139] Then, according to the second indication information, after the first retransmission is completed on the PUSCH using HARQ ID1 as indicated by the PDCCH, the terminal does not start the DRX retransmission timer corresponding to HARQ ID1.

[0140] exist Figure 8At time t3 shown, the network device instructs the terminal to retransmit uplink data using the PUSCH of HARQ ID1 through the PDCCH, and the PDCCH carries second indication information, which indicates to start the DRX retransmission timer for the HARQ process with the HARQ retransmission function turned off.

[0141] Then, according to the second indication information, after the PDCCH indicates that the first retransmission on the PUSCH of HARQ ID1 is completed, the terminal starts the DRX retransmission timer corresponding to HARQ ID1.

[0142] It should be noted that after the PDCCH indicates to use the PUSCH of the HARQ process to retransmit uplink data, the terminal determines whether to start the DRX retransmission timer corresponding to the HARQ process according to the second indication information carried in the PDCCH. That is, each PDCCH sent by the network device carries the second indication information, and the difference between the PDCCHs received at different times is only whether the second indication information instructs the terminal to start the DRX retransmission timer or instructs the terminal not to start the DRX retransmission timer.

[0143] Based on the above Figure 7 and Figure 8 In the startup process shown, the running time of the DRX retransmission timer can be pre-configured by the network device, and the embodiment of the present application does not impose any restrictions on this.

[0144] In summary, in the embodiment of the present application, for a HARQ process with a HARQ function turned off, the terminal can determine whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information. In this way, the terminal can flexibly start the DRX retransmission timer corresponding to the HARQ used for transmitting data, and when it is not started, the purpose of saving power for the terminal can be achieved.

[0145] Please refer to Fig. 9 , Fig. 9 is a flowchart of a method for starting a DRX retransmission timer shown in another exemplary embodiment of the present application, which method can be applied to the above Figure 3 In the network device 310 in the communication system shown, the method may include at least part of the following contents:

[0146] Step 910: Send indication information, where the indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the HARQ process.

[0147] The indication information may be first indication information for downlink transmission, and the first indication information is used to indicate whether the terminal starts a DRX retransmission timer corresponding to a downlink HARQ process for which a HARQ feedback function is disabled.

[0148] The indication information may also be second indication information for uplink transmission, and the second indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the uplink HARQ process for which the HARQ retransmission function is disabled.

[0149] It should be noted that the indication information is effective for both the cases where the transmission resources are dynamically scheduled and semi-statically scheduled, and the semi-static scheduling is the SPS used to indicate the scheduling of downlink transmission resources or the CG used to indicate the scheduling of uplink transmission resources; or, the indication information is only effective for the case where the transmission resources are dynamically scheduled; or, the indication information is only effective for the case where the transmission resources are semi-statically scheduled.

[0150] In addition, when sending indication information, the network device can send it to the terminal in a semi-static configuration manner. In this way, when the terminal receives downlink data or sends uplink data, it determines whether to start the DRX retransmission timer corresponding to the HARQ process based on the pre-configured indication information. The indication information can be carried in a system message, RRC dedicated signaling or MAC CE.

[0151] Among them, if the first indication information is only effective when the downlink transmission is SPS transmission, the first indication information can be carried in the PDCCH for activating SPS. If the second indication information is only effective when the uplink transmission is CG transmission, the second indication information can be carried in the PDCCH for activating the second type CG.

[0152] When sending indication information, the network device can send it to the terminal in a dynamic configuration manner. In this way, when the terminal receives downlink data or sends uplink data, it determines whether to start the DRX retransmission timer corresponding to the HARQ process based on the indication information sent by the network device in real time. The indication information can be carried in the PDCCH indicating the scheduling of initial transmission or retransmission.

[0153] In summary, in the embodiment of the present application, the network device effectively controls the PDCCH monitoring behavior of the terminal by sending indication information, and the indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process. When the network expects to schedule retransmission, it can instruct the terminal to start the DRX retransmission timer to monitor the PDCCH scheduled for retransmission; when the network does not expect to schedule retransmission, it can instruct the terminal not to start the DRX retransmission timer, thereby achieving the purpose of saving power for the terminal.

[0154] Next, based on Figure 3 The communication system shown in the figure explains the method for starting the DRX retransmission timer provided by the present application through the interaction process between the terminal and the network device, see Fig.10 , Fig.10It is a flowchart of a method for starting a DRX retransmission timer shown in another exemplary embodiment of the present application.

[0155] Step 1010: The network device sends RRC configuration information, where the RRC configuration information includes DRX parameters and HARQ process configuration parameters.

[0156] Among them, the DRX parameter is used to start the DRX timer, the DRX timer includes the DRX retransmission timer, the HARQ process configuration parameter includes the number of HARQ processes and the status information of the HARQ process, and the status information of the HARQ process is used to indicate whether the feedback function or the retransmission function of the HARQ process is turned on.

[0157] It should be noted that the DRX timer also includes a DRX duration timer, a DRX inactive timer, and a DRX short cycle timer. The embodiment of the present application does not limit the configuration parameters of timers other than the DRX retransmission timer.

[0158] Step 1020: The terminal receives RRC configuration information.

[0159] Step 1030: The network device sends indication information, where the indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the HARQ process.

[0160] If the network device uses one indication information to separately control the uplink HARQ process and the downlink HARQ process, the indication contents of the sent first indication information and the second indication information are the same.

[0161] As an example, the content of the indication information is that the terminal starts the DRX retransmission timer corresponding to the HARQ process. Then the first indication information is used to instruct the terminal to start the DRX retransmission timer corresponding to the downlink HARQ process for which the HARQ feedback function is disabled, and the second indication information is used for the terminal to start the DRX retransmission timer corresponding to the uplink HARQ process for which the HARQ retransmission function is disabled.

[0162] If the network device uses different indication information to separately control the uplink HARQ process and the downlink HARQ process, the indication content of the sent first indication information is different.

[0163] As an example, the first indication information is used to instruct the terminal not to start the DRX retransmission timer corresponding to the downlink HARQ process with the HARQ feedback function turned off, and the second indication information is used by the terminal to start the DRX retransmission timer corresponding to the uplink HARQ process with the HARQ retransmission function turned off.

[0164] It should be noted that the specific implementation process of step 1030 can refer to the above step 910 and will not be repeated here.

[0165] Step 1040: The terminal receives the indication information.

[0166] Step 1050: The terminal determines whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information.

[0167] In summary, in the embodiment of the present application, the network device effectively controls the PDCCH monitoring behavior of the terminal by sending indication information, and the terminal determines whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information. When the network expects to schedule retransmission, it can instruct the terminal to start the DRX retransmission timer to monitor the PDCCH scheduled for retransmission; when the network does not expect to schedule retransmission, it can instruct the terminal not to start the DRX retransmission timer, thereby achieving the purpose of terminal power saving.

[0168] Fig.11 1 is a structural diagram of a device for starting a DRX retransmission timer shown in an exemplary embodiment of the present application. The device 1100 can be configured in a terminal. The device 1100 includes:

[0169] The receiving module 1110 is used to receive instruction information;

[0170] The determination module 1120 is used to determine whether to start the DRX retransmission timer corresponding to the hybrid automatic repeat request HARQ process according to the indication information.

[0171] Optionally, the indication information is first indication information;

[0172] The first indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the downlink HARQ process for which the HARQ feedback function is disabled.

[0173] Optionally, the determination module 1120 is further configured to:

[0174] In a case where a physical downlink control channel PDCCH for indicating scheduling of an initial downlink transmission is received, and the HARQ process used for the downlink transmission corresponding to the initial downlink transmission is a HARQ process with a HARQ feedback function disabled, determining whether to start a DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information;

[0175] or,

[0176] When a PDCCH for indicating scheduling of downlink retransmission is received and the HARQ process used for the downlink transmission corresponding to the downlink retransmission is a HARQ process with a HARQ feedback function disabled, it is determined whether to start a DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information.

[0177] Optionally, the determination module 1120 is further configured to:

[0178] When a downlink initial transmission (data) is received on a downlink authorized resource and the HARQ process used for the downlink transmission corresponding to the downlink initial transmission is a HARQ process with a HARQ feedback function disabled, it is determined whether to start a DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information.

[0179] Optionally,

[0180] The first indication information is effective for both the case where the downlink transmission is dynamically scheduled and the case where the downlink transmission is semi-statically scheduled SPS transmission;

[0181] or,

[0182] The first indication information is only effective when downlink transmission is dynamically scheduled;

[0183] or,

[0184] The first indication information is effective only when the downlink transmission is SPS transmission.

[0185] Optionally, the determination module 1120 is further configured to:

[0186] When the first indication information is used to indicate that the DRX retransmission timer corresponding to the downlink HARQ process with the HARQ feedback function disabled is not started, the DRX retransmission timer corresponding to each downlink HARQ process with the HARQ feedback function disabled is stopped.

[0187] Optionally, the determination module 1120 is further configured to:

[0188] When downlink transmission is dynamically scheduled and the first indication information is used to indicate starting a DRX retransmission timer corresponding to a downlink HARQ process for a downlink HARQ process with a HARQ feedback function disabled, starting or restarting the DRX retransmission timer corresponding to the downlink HARQ process when a PDCCH is received;

[0189] or,

[0190] When the downlink transmission is dynamically scheduled and the first indication information is used to indicate the start of the DRX retransmission timer corresponding to the downlink HARQ process for the downlink HARQ process with the HARQ feedback function turned off, the DRX retransmission timer corresponding to the downlink HARQ process is stopped when the PDCCH is received, and the DRX retransmission timer corresponding to the downlink HARQ process is started after the physical downlink shared channel PDSCH indicated by the PDCCH is received.

[0191] Optionally, the determination module 1120 is further configured to:

[0192] When the downlink transmission is SPS transmission scheduling and the first indication information is used to indicate the start of the DRX retransmission timer corresponding to the downlink HARQ process for the downlink HARQ process with the HARQ feedback function turned off, the DRX retransmission timer corresponding to the downlink HARQ process is started after receiving the PDSCH indicated by the PDCCH.

[0193] Optionally, the indication information is second indication information;

[0194] The second indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the uplink HARQ process for which the HARQ retransmission function is disabled.

[0195] Optionally, the determination module 1120 is further configured to:

[0196] When a PDCCH for indicating scheduling of an uplink initial transmission is received, and the HARQ process used for the uplink transmission corresponding to the uplink initial transmission is a HARQ process with a HARQ retransmission function disabled, determining whether to start a DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information;

[0197] or,

[0198] When a PDCCH for indicating scheduling of uplink retransmission is received and the HARQ process used for uplink transmission corresponding to the uplink retransmission is a HARQ process with the HARQ retransmission function disabled, it is determined whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information.

[0199] Optionally, the determination module 1120 is further configured to:

[0200] When an uplink initial transmission (data) is sent on an uplink authorized resource and the HARQ process used for the uplink transmission corresponding to the uplink initial transmission is a HARQ process with the HARQ retransmission function disabled, it is determined whether to start the DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information.

[0201] Optionally,

[0202] The second indication information is effective for both the case where the uplink transmission is dynamically scheduled and the case where the uplink transmission is configured to be scheduled CG transmission;

[0203] or,

[0204] The second indication information is only effective when the uplink transmission is dynamically scheduled;

[0205] or,

[0206] The second indication information is only effective when the uplink transmission is CG transmission.

[0207] Optionally, the determination module 1120 is further configured to:

[0208] When the second indication information is used to indicate that the DRX retransmission timer corresponding to the uplink HARQ process with the HARQ retransmission function disabled is not started, the DRX retransmission timer corresponding to each uplink HARQ process with the HARQ retransmission function disabled is stopped.

[0209] Optionally, the determination module 1120 is further configured to:

[0210] When the uplink transmission is dynamically scheduled and the second indication information is used to indicate starting the DRX retransmission timer corresponding to the uplink HARQ process for an uplink HARQ process with the HARQ retransmission function disabled, starting or restarting the DRX retransmission timer corresponding to the uplink HARQ process when the PDCCH is received;

[0211] or,

[0212] When the uplink transmission is dynamically scheduled and the second indication information is used to indicate the start of the DRX retransmission timer corresponding to the uplink HARQ process for the uplink HARQ process with the HARQ retransmission function turned off, the DRX retransmission timer corresponding to the uplink HARQ process is stopped when the PDCCH is received, and the DRX retransmission timer corresponding to the uplink HARQ process is started after the physical uplink shared channel PUSCH indicated by the PDCCH is received.

[0213] Optionally, the determination module 1120 is further configured to:

[0214] When the uplink transmission is CG transmission scheduling and the second indication information is used to indicate the start of the DRX retransmission timer corresponding to the uplink HARQ process for the uplink HARQ process with the HARQ retransmission function turned off, the DRX retransmission timer corresponding to the uplink HARQ process is started after the first retransmission is completed on the PUSCH indicated by the PDCCH.

[0215] Optionally, the indication information is sent by the network device in a semi-static configuration manner.

[0216] Optionally, the indication information is carried in a system message, a radio resource control RRC dedicated signaling or a media access control element MAC CE.

[0217] Optionally, the first indication information is carried in a PDCCH used to activate SPS, and the second indication information is carried in a PDCCH used to activate a second type of CG.

[0218] Optionally, the indication information is sent in a dynamic configuration manner.

[0219] Optionally, the indication information is included in a PDCCH used to indicate scheduling of initial transmission or retransmission.

[0220] Optionally, the receiving module 1110 is further configured to:

[0221] Receiving RRC configuration information, where the RRC configuration information includes DRX parameters and HARQ process configuration parameters;

[0222] The DRX parameter is used to start the DRX timer, which includes the DRX retransmission timer. The HARQ process configuration parameter includes the number of HARQ processes and the status information of the HARQ process. The status information of the HARQ process is used to indicate whether the feedback function or the retransmission function of the HARQ process is enabled.

[0223] In the embodiment of the present application, for a HARQ process with a HARQ function turned off, the terminal can determine whether to start the DRX retransmission timer corresponding to the HARQ process according to the indication information. In this way, the terminal can flexibly start the DRX retransmission timer corresponding to the HARQ used for transmitting data, and when it is not started, the purpose of saving power for the terminal can be achieved.

[0224] Fig.12 12 is a structural diagram of a device for starting a DRX retransmission timer shown in another exemplary embodiment of the present application. The device 1200 can be configured in a network device. The device 1200 includes:

[0225] The sending module 1210 is used to send indication information, where the indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process.

[0226] Optionally, the indication information is first indication information;

[0227] The first indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the downlink HARQ process for which the HARQ feedback function is disabled.

[0228] Optionally, the indication information is second indication information;

[0229] The second indication information is used to instruct the terminal whether to start the DRX retransmission timer corresponding to the uplink HARQ process for which the HARQ retransmission function is disabled.

[0230] Optionally,

[0231] The indication information is effective for both dynamic scheduling and semi-static scheduling of transmission resources. The semi-static scheduling is the SPS used to indicate the scheduling of downlink transmission resources or the CG used to indicate the scheduling of uplink transmission resources.

[0232] or,

[0233] The indication information is only effective when the transmission resources are dynamically scheduled;

[0234] or,

[0235] The indication information is effective only when the transmission resources are semi-persistently scheduled.

[0236] Optionally, the indication information is sent in a semi-static configuration manner.

[0237] Optionally, the indication information is carried in a system message, a radio resource control RRC dedicated signaling or a media access control element MAC CE.

[0238] Optionally, the first indication information is carried in a PDCCH used to activate SPS, and the second indication information is carried in a PDCCH used to activate a second type of CG.

[0239] Optionally, the indication information is sent in a dynamic configuration manner.

[0240] Optionally, the indication information is included in a PDCCH used to indicate scheduling of initial transmission or retransmission.

[0241] Optionally, the sending module 1210 is further configured to:

[0242] Send RRC configuration information, where the RRC configuration information includes DRX parameters and HARQ process configuration parameters;

[0243] Among them, the DRX parameter is used to start the DRX timer, the DRX timer includes the DRX retransmission timer, the HARQ process configuration parameter includes the number of HARQ processes and the status information of the HARQ process, and the status information of the HARQ process is used to indicate whether the feedback function or the retransmission function of the HARQ process is turned on.

[0244] In the embodiment of the present application, the network device effectively controls the PDCCH monitoring behavior of the terminal by sending indication information, and the indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process. When the network expects to schedule retransmission, the terminal can be instructed to start the DRX retransmission timer to monitor the PDCCH scheduled for retransmission; when the network does not expect to schedule retransmission, the terminal can be instructed not to start the DRX retransmission timer, thereby achieving the purpose of terminal power saving.

[0245] Please refer to Fig.13 , which shows a schematic diagram of the structure of a communication device (terminal or network device) provided by an exemplary embodiment of the present application, the communication device includes: a processor 1301, a receiver 1302, a transmitter 1303, a memory 1304 and a bus 1305.

[0246] The processor 1301 includes one or more processing cores. The processor 1301 executes various functional applications and information processing by running software programs and modules.

[0247] The receiver 1302 and the transmitter 1303 may be implemented as a communication component, which may be a communication chip.

[0248] The memory 1304 is connected to the processor 1301 via a bus 1305 .

[0249] The memory 1304 may be used to store at least one instruction, and the processor 1301 may be used to execute the at least one instruction to implement the various steps performed by the terminal and the network device in the above-mentioned various method embodiments.

[0250] In addition, the memory 1304 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage device includes but is not limited to: a magnetic disk or an optical disk, an EEPROM (Electrically Erasable Programmable read only memory), an EPROM (Erasable Programmable Read-Only Memory), a SRAM (Static Random Access Memory), a ROM (Read Only Memory), a magnetic storage device, a flash memory, and a PROM (Programmable Read-Only Memory).

[0251] The present application provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is loaded and executed by the processor to implement the method for starting the DRX retransmission timer provided in the above-mentioned various method embodiments.

[0252] The present application also provides a computer program product. When the computer program product is run on a computer, the computer executes the method for starting the DRX retransmission timer provided in each of the above method embodiments.

[0253] Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0254] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for starting a DRX retransmission timer, characterized in that: Applied to a terminal, the method comprises: receiving instruction information; According to the indication information, it is determined whether to start a DRX retransmission timer corresponding to a hybrid automatic repeat request HARQ process.

2. The method according to claim 1, characterized in that The indication information is first indication information; The first indication information is used to instruct the terminal whether to start a DRX retransmission timer corresponding to a downlink HARQ process with a HARQ feedback function disabled for the downlink HARQ process.

3. The method according to claim 2, characterized in that The determining, according to the indication information, whether to start a DRX retransmission timer corresponding to a hybrid automatic repeat request HARQ process includes: In a case where a physical downlink control channel PDCCH for indicating scheduling of a downlink initial transmission is received, and the HARQ process used for the downlink transmission corresponding to the downlink initial transmission is a HARQ process with a HARQ feedback function disabled, determining whether to start a DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information; or, In a case where a PDCCH for indicating scheduling of downlink retransmission is received, and the HARQ process used for the downlink transmission corresponding to the downlink retransmission is a HARQ process with a HARQ feedback function disabled, determining whether to start a DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information; or, When an initial downlink transmission (data) is received on a downlink authorized resource, and the HARQ process used for the downlink transmission corresponding to the initial downlink transmission is a HARQ process with a HARQ feedback function disabled, it is determined whether to start a DRX retransmission timer corresponding to the downlink HARQ process according to the first indication information.

4. The method according to claim 3, characterized in that The first indication information is effective for both the case where the downlink transmission is dynamically scheduled and semi-persistently scheduled SPS transmission; or, The first indication information is only effective when the downlink transmission is dynamically scheduled; or, The first indication information is effective only when the downlink transmission is SPS transmission.

5. The method according to claim 3, characterized in that: The determining, according to the first indication information, whether to start the DRX retransmission timer corresponding to the downlink HARQ process includes: When the first indication information is used to indicate that the DRX retransmission timer corresponding to the downlink HARQ process with the HARQ feedback function disabled is not started, stopping the DRX retransmission timer corresponding to each downlink HARQ process with the HARQ feedback function disabled; or, When the downlink transmission is dynamically scheduled and the first indication information is used to indicate that a DRX retransmission timer corresponding to the downlink HARQ process is started for a downlink HARQ process with a HARQ feedback function disabled, the DRX retransmission timer corresponding to the downlink HARQ process is started or restarted when the PDCCH is received; or, When the downlink transmission is dynamically scheduled and the first indication information is used to indicate that a DRX retransmission timer corresponding to the downlink HARQ process is started for a downlink HARQ process with a HARQ feedback function disabled, the DRX retransmission timer corresponding to the downlink HARQ process is stopped when the PDCCH is received, and the DRX retransmission timer corresponding to the downlink HARQ process is started after a physical downlink shared channel PDSCH indicated by the PDCCH is received; or, When the downlink transmission is SPS transmission scheduling and the first indication information is used to indicate to start the DRX retransmission timer corresponding to the downlink HARQ process for a downlink HARQ process with a HARQ feedback function turned off, the DRX retransmission timer corresponding to the downlink HARQ process is started after receiving the PDSCH indicated by the PDCCH.

6. The method according to claim 1, characterized in that The indication information is second indication information; The second indication information is used to instruct the terminal whether to start a DRX retransmission timer corresponding to an uplink HARQ process with a HARQ retransmission function disabled for the uplink HARQ process.

7. The method according to claim 6, characterized in that The determining, according to the indication information, whether to start a DRX retransmission timer corresponding to a hybrid automatic repeat request HARQ process includes: When a PDCCH for indicating scheduling of an uplink initial transmission is received, and the HARQ process used for the uplink transmission corresponding to the uplink initial transmission is a HARQ process with a HARQ retransmission function disabled, determining whether to start a DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information; or, When a PDCCH for indicating scheduling of uplink retransmission is received, and the HARQ process used for the uplink transmission corresponding to the uplink retransmission is a HARQ process with a HARQ retransmission function disabled, determining whether to start a DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information; or, When an uplink initial transmission (data) is sent on an uplink authorized resource and the HARQ process used for the uplink transmission corresponding to the uplink initial transmission is a HARQ process with a HARQ retransmission function disabled, it is determined whether to start a DRX retransmission timer corresponding to the uplink HARQ process according to the second indication information.

8. The method according to claim 7, characterized in that The second indication information is effective for both the case where the uplink transmission is dynamically scheduled and the case where the uplink transmission is configured to be scheduled CG transmission; or, The second indication information is only effective when the uplink transmission is dynamically scheduled; or, The second indication information is only effective when the uplink transmission is a CG transmission.

9. The method according to claim 7, characterized in that: The determining, according to the indication information, whether to start the DRX retransmission timer corresponding to the uplink HARQ process includes: When the second indication information is used to indicate that the DRX retransmission timer corresponding to the uplink HARQ process with the HARQ retransmission function disabled is not started for the uplink HARQ process with the HARQ retransmission function disabled, stopping the DRX retransmission timer corresponding to each uplink HARQ process with the HARQ retransmission function disabled; or, When the uplink transmission is dynamically scheduled and the second indication information is used to indicate that a DRX retransmission timer corresponding to the uplink HARQ process is started for an uplink HARQ process with a HARQ retransmission function disabled, the DRX retransmission timer corresponding to the uplink HARQ process is started or restarted when the PDCCH is received; or, When the uplink transmission is dynamically scheduled and the second indication information is used to indicate that a DRX retransmission timer corresponding to the uplink HARQ process is started for an uplink HARQ process with a HARQ retransmission function disabled, the DRX retransmission timer corresponding to the uplink HARQ process is stopped when the PDCCH is received, and the DRX retransmission timer corresponding to the uplink HARQ process is started after a physical uplink shared channel PUSCH indicated by the PDCCH is received; or, When the uplink transmission is CG transmission scheduling and the second indication information is used to indicate the start of the DRX retransmission timer corresponding to the uplink HARQ process for the uplink HARQ process with the HARQ retransmission function turned off, the DRX retransmission timer corresponding to the uplink HARQ process is started after the first retransmission is completed on the PUSCH indicated by the PDCCH.

10. The method according to claim 2 or 6, characterized in that: The indication information is sent by the network device in a semi-static configuration manner, wherein the indication information is carried in a system message, a radio resource control RRC dedicated signaling, or a media access control control element MAC CE, or the first indication information is carried in a PDCCH for activating SPS, or the second indication information is carried in a PDCCH for activating a second type of CG; or, The indication information is sent in a dynamic configuration manner, wherein the indication information is included in a PDCCH used to indicate scheduling of initial transmission or retransmission.

11. The method according to claim 1, characterized in that: Before receiving the indication information, the method further includes: Receiving RRC configuration information, where the RRC configuration information includes DRX parameters and HARQ process configuration parameters; The DRX parameter is used to start a DRX timer, the DRX timer includes a DRX retransmission timer, the HARQ process configuration parameter includes the number of HARQ processes and status information of the HARQ process, and the status information of the HARQ process is used to indicate whether a feedback function or a retransmission function of the HARQ process is turned on.

12. A method for starting a discontinuous reception DRX retransmission timer, characterized in that: Applied to a network device, the method comprises: Send indication information, where the indication information is used to indicate whether the terminal starts the DRX retransmission timer corresponding to the HARQ process.

13. The method according to claim 12, characterized in that Before sending the indication information, the method further includes: Sending RRC configuration information, where the RRC configuration information includes DRX parameters and HARQ process configuration parameters; The DRX parameter is used to start a DRX timer, the DRX timer includes a DRX retransmission timer, the HARQ process configuration parameter includes the number of HARQ processes and status information of the HARQ process, and the status information of the HARQ process is used to indicate whether the feedback function or retransmission function of the HARQ process is turned on.

14. A terminal, characterized in that: The device comprises a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the steps of any one of the methods of claims 1-11.

15. A network device, characterized in that: The device comprises a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the steps of any one of the methods of claims 12-13.

Images