Downlink control information transmission method, device, equipment and medium

Abstract

The invention discloses a downlink control information transmission method and device, equipment and a medium, and relates to the field of wireless communication. The method is applied to a terminal device, the terminal device comprising at least two subscriber identity cards, the method comprising: receiving downlink control information, the downlink control information being sent for a multi-card terminal device according to the terminal device (210). The method can prevent the SIM card in the offline state from missing the DCI.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a method, device, equipment and medium for transmitting downlink control information. Background Art

[0002] A multi-card terminal device refers to a terminal device (User Equipment, UE) having multiple SIMs (Subscriber Identity Modules, User Identity Modules).

[0003] Since some multi-card terminal devices have only one RF receiving channel, when one SIM card is performing downlink transmission, the other SIM card cannot perform downlink transmission and enters an offline state. The SIM card in the offline state may miss important DCI (Downlink Control Information). Summary of the invention

[0004] The embodiment of the present application provides a method, device, equipment and medium for transmitting downlink control information, which can prevent a SIM card in an offline state from missing DCI. The technical solution is as follows:

[0005] According to one aspect of the present application, a method for transmitting downlink control information is provided, the method being executed by a terminal device, the terminal device comprising at least two user identification cards, the method comprising:

[0006] Downlink control information is received, where the downlink control information is sent according to the terminal device being a multi-card terminal device.

[0007] According to one aspect of the present application, a method for transmitting downlink control information is provided, the method being executed by a network device, the method comprising:

[0008] Sending downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, wherein the terminal device includes at least two user identification cards.

[0009] According to one aspect of the present application, a device for transmitting downlink control information is provided, the device comprising:

[0010] The first receiving module is used to receive downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

[0011] According to one aspect of the present application, a device for transmitting downlink control information is provided, the device comprising:

[0012] The second sending module is used to send downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

[0013] According to one aspect of the present application, a terminal device is provided, the terminal device comprising: a processor and a transceiver connected to the processor; wherein,

[0014] The transceiver is used to receive downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

[0015] According to one aspect of the present application, a network device is provided, the network device comprising: a processor and a transceiver connected to the processor; wherein:

[0016] The transceiver is used to send downlink control information, and the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

[0017] According to one aspect of the present application, a terminal device is provided, comprising: a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for transmitting downlink control information as described in the above aspects.

[0018] According to one aspect of the present application, a network device is provided, comprising: a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for transmitting downlink control information as described in the above aspects.

[0019] According to one aspect of the present application, a computer-readable storage medium is provided, in which executable instructions are stored. The executable instructions are loaded and executed by a processor to enable a communication device to implement the method for transmitting downlink control information as described in the above aspect.

[0020] According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions. When the chip runs on a communication device, it is used to enable the communication device to implement the method for transmitting downlink control information described in the above aspect.

[0021] According to one aspect of the present application, a computer program product is provided. When the computer program product is executed on a processor of a communication device, the communication device executes the method for transmitting downlink control information described in the above aspect.

[0022] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0023] When the terminal device is a multi-card terminal device that supports multiple user identification cards, the network device can determine the transmission mode of the downlink control information according to the multi-card terminal device to prevent the user identification card in the offline state from missing the downlink control information sent by the network device. This prevents the user identification card in the offline state from reoccupying the transceiver path and causing the network connection to fail due to the change of the scheduling resources on the network side. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 is a schematic diagram of a communication system provided by an exemplary embodiment of the present application;

[0026] Figure 2 is a schematic diagram of resource occupation provided by an exemplary embodiment of the present application;

[0027] Figure 3 is a schematic diagram of resource occupation provided by an exemplary embodiment of the present application;

[0028] Figure 4 is a schematic diagram of a communication system provided by an exemplary embodiment of the present application;

[0029] Figure 5 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0030] Figure 6 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0031] Figure 7 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0032] Figure 8 is a schematic diagram of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0033] Fig. 9 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0034] Fig.10 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0035] Fig.11 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0036] Fig.12 is a method flow chart of a method for transmitting downlink control information provided by an exemplary embodiment of the present application;

[0037] Fig.13 is a structural block diagram of a transmission device for downlink control information provided by an exemplary embodiment of the present application;

[0038] Fig.14 is a structural block diagram of a transmission device for downlink control information provided by an exemplary embodiment of the present application;

[0039] Fig.15 It is a structural diagram of a communication device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0040] 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.

[0041] The network 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 the 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.

[0042] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0043] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0044] In the embodiments of the present application, "pre-definition" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0045] First, the relevant terms mentioned in this embodiment are introduced.

[0046] 1. Multi-card terminal equipment

[0047] With the development of communication technology, multi-card communication terminal equipment has shown more technical advantages and commercial prospects than traditional single-card terminals. Currently, many mobile terminals have the function of supporting multiple cards. Figure 1 As shown, multi-card means that the same terminal device supports more than one Subscriber Identity Module (SIM) card, and multiple SIM cards can be connected to different communication networks respectively (which can be mobile networks of different standards such as GSM (Global System for Mobile Communications) / CDMA (Code Division Multiple Access) / LTE (Long Term Evolution) / NR (New Radio)).

[0048] A multi-SIM terminal device refers to a terminal device that has multiple SIM cards. The multiple SIM cards can belong to the same operator or different operators. Figure 1 As shown, the terminal device includes SIM1 and SIM2. The terminal device communicates with network 1 through SIM1 and communicates with network 2 through SIM2.

[0049] Furthermore, multi-SIM terminal devices can be classified according to whether these cards (SIM) can work at the same time. At present, multi-SIM terminal devices are mainly dual-SIM, with working modes such as Dual SIM Dual Standby (DSDS), Dual Receive-Dual SIM Dual Standby (DR-DSDS), and Dual SIM DualActive (DSDA).

[0050] Dual SIM Dual Standby (DSDS) terminal devices use time division multiplexing to connect to their respective networks and monitor paging through two SIM cards in standby (idle state). When one of the SIM cards enters the call state / connected state, the connection between the SIM card and the corresponding network enters the active state. During this period, the dual SIM device cannot receive paging monitoring from the network to which the other card belongs.

[0051] The dual-receive dual-SIM dual-standby (DR-DSDS) terminal device is equipped with one RF transmission path and two RF reception paths. When one SIM card is performing downlink data transmission, the other SIM card can receive paging messages; however, when one SIM card occupies the only RF transmission path for uplink transmission, the other SIM card cannot establish a two-way connection with the corresponding network and cannot enter the activated state.

[0052] The terminal device of Dual SIM Dual Activation (DSDA) is equipped with two sets of transceiver radios, that is, each SIM card has an independent transceiver radio, so that each SIM card and the corresponding network connection can work in an activated state at the same time. The disadvantage of this working mode is that the cost of configuring two sets of transceiver radios is high, and configuring two sets of radios will occupy a large layout area and increase the size of the mobile phone.

[0053] Considering factors such as utilization efficiency, cost, and design, sharing / reusing transceiver resources is a typical dual-SIM terminal device working mode. According to different service priorities and other criteria, users corresponding to the two SIM cards take turns to occupy resources to achieve communication with their respective networks. Figure 2 As shown, when the service of SIM1 occupies all transmission resources, the connection between SIM2 and the network is interrupted, and the user corresponding to SIM2 temporarily enters the offline state and cannot receive all downlink control information (DCI), data, etc. from the corresponding network.

[0054] The networks that each card of a multi-card terminal device works on can include 2G / 3G / 4G / 5G, etc., depending on the user's choice.

[0055] The base station (BS) notifies the terminal equipment (UE) of the relevant parameter configuration required to receive downlink data, such as modulation scheme, coding rate, resource allocation, etc., through downlink control information (DCI). The switching of partial bandwidth (Bandwidth Part, BWP) also needs to be notified to the terminal equipment through DCI. The terminal equipment must first correctly decode the DCI before it can correctly receive and parse the downlink data. Once the terminal equipment misses the DCI information of the base station, it will affect the subsequent communication process with the base station, such as causing packet loss, reduced quality of received data, retransmission, increased latency, and even requiring the terminal equipment to re-initiate the access process to re-establish a connection with the base station side. Therefore, successfully receiving and correctly parsing DCI is crucial for the terminal equipment to accurately receive downlink data and maintain a stable communication connection with the base station.

[0056] Based on the aforementioned application scenario of multi-card terminal equipment time-division multiplexing resources, one user (SIM1) occupies resources and establishes a connection with the user's network (Network1), receives and parses the DCI from Network1. At this time, due to the arrival of another user's (SIM2) service and having a higher service priority than the user SIM1 currently occupying the transceiver resources, SIM2 obtains the transceiver resources and establishes a connection with its corresponding network Network2 to complete SIM2's service. During the period when SIM2 occupies the transceiver resources, the user of SIM1 is offline and cannot receive DCI from its network Network1. If the DCI configured by the network is missed, the subsequent communication connection between SIM1 and Network1 will be affected.

[0057] like Figure 3As shown, when the missed DCI contains configurations that have a critical impact on the network connection, the user may be unable to resume communication with the network. For example, SIM1 works on the specified partial bandwidth BWP#0 according to the network instruction in the initial connection. During the period when the resource is requisitioned by the connection of SIM2, Network1 instructs user SIM1 to perform partial bandwidth switching (BWP Switch) through DCI according to the scheduling requirements, switches to another specified partial bandwidth BWP#1, and configures DCI and corresponding data transmission resources for user SIM1 on the new partial bandwidth BWP#1, and SIM1 enters the offline state; when SIM1 regains the transceiver resources, it will still try to monitor DCI on BWP#0 allocated by the network before the offline due to missing the DCI reception opportunity including BWP Switch. At this time, the network Network1 has switched the DCI transmission about SIM1 to BWP#1, so SIM1 can no longer detect valid DCI, and thus loses the connection with the network Network1.

[0058] In this case, the terminal user of SIM1 needs to recover from the radio link failure by resetting the Radio Link Control (RLC), or even reconnect to the network through a random access process. Such RLC reset or additional random access process will cause a significant delay to the service of SIM1.

[0059] In the related art, when the user of SIM1 (the user who is disconnected from the network due to resource preemption in the dual-card terminal device) regains resources, if no valid DCI is detected on the original BWP#0 within a certain time interval, it is decided to detect whether there is DCI configured for the user on the BWP (for example, BWP#1) that was not allocated to the user before the network disconnection. The disadvantages of this solution are as follows:

[0060] After acquiring resources, it is still necessary to perform DCI detection on the original BWP#0 for a period of time to determine that there is no valid DCI in the BWP#0. It is necessary to try to detect on other unallocated BWPs, which will cause corresponding delays.

[0061] The detection on other unallocated BWPs is a blind detection process. It may be necessary to traverse all BWPs to find the BWP allocated to the user on the base station side. It cannot be directly located on the BWP configured on the base station side, resulting in additional power consumption overhead.

[0062] If no BWP switching occurs during the user's offline period, traversing other bandwidths outside the allocated BWP and performing DCI blind detection will cause meaningless power consumption overhead to the terminal.

[0063] Please refer to Figure 4 , which shows a schematic diagram of a network architecture 100 provided by an embodiment of the present application. The network architecture 100 may include: a terminal device 10, an access network device 20 and a core network device 30.

[0064] The terminal device 10 may refer to a user equipment (UE), an access terminal device, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a wireless communication device, a user agent or a user device. Optionally, the terminal device 10 may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a wireless communication function, a computing device or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in the fifth generation mobile communication system (5th Generation System, 5GS) or a terminal device in a future evolved public land mobile communication network (Public Land Mobile Network, PLMN), etc., and the embodiments of the present application are not limited to this. For the convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 can be distributed in the cell managed by each access network device 20.

[0065] The access network device 20 is a device deployed in the access network to provide wireless communication functions for the terminal device 10. The access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in the 5G NR system, it is called gNodeB or gNB (next Generation Node B, next generation node B (or new generation access network node)). With the evolution of communication technology, the name "access network device" may change. For the convenience of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as access network devices. Optionally, a communication relationship can be established between the terminal device 10 and the core network device 30 through the access network device 20. Exemplarily, in a Long Term Evolution (LTE) system, the access network device 20 may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN) or one or more eNodeBs in EUTRAN; in a 5G NR system, the access network device 20 may be a Radio Access Network (RAN) or one or more gNBs in a RAN.

[0066] Among them, the access network equipment in the 3G communication system can be called NodeB (NB). The access network equipment in the 4G communication system can be called eNodeB (evolved NodeB, eNB). Under the Non-Standalone (NSA) architecture of the Option 4 series, the 4G access network equipment needs to be upgraded to support eLTE and connect to the 5G core network. The upgraded 4G access network equipment is called ng-eNB. The access network equipment in the 5G communication system is called gNB (generationNodeB). In the NAS Option 3 series, since the 5G access network equipment needs to access the 4G core network, the 5GgNB needs to be modified to access the 4G core network. The modified gNB is called en-gNB.

[0067] The core network device 30 is a device deployed in the core network. The function of the core network device 30 is mainly to provide user connection, user management and service bearing, and to provide an interface to the external network as a bearer network. For example, the core network equipment in the 5G NR system may include an access and mobility management function (Access and Mobility Management Function, AMF) network element, an authentication server function (Authentication Server Function, AUSF) network element, a user plane function (User Plane Function, UPF) network element, a session management function (Session Management Function, SMF) network element, a location management function (Location Management Function, LMF) network element, a policy control function (Policy Control Function, PCF) network element, a unified data management (Unified Data Management, UDM) network element, etc.

[0068] In one example, the access network device 20 and the core network device 30 communicate with each other through a certain interface technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other through a certain air interface technology, such as the Uu interface.

[0069] Access network equipment is the access equipment that terminal equipment uses to access the network architecture wirelessly. It is mainly responsible for wireless resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. For example: base station (NodeB), evolved base station (eNodeB), base station in 5G mobile communication system or new generation wireless (New Radio, NR) communication system, base station in future mobile communication system, etc.

[0070] The "5G NR system" in the embodiment of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art may understand its meaning. The technical solution described in the embodiment of the present application may be applicable to an LTE system, a 5GNR system, a subsequent evolution system of the 5G NR system, or other communication systems such as a NarrowBand Internet of Things (NB-IoT) system, and the present application does not limit this.

[0071] Please refer to Figure 5 , which shows a flow chart of a method for transmitting downlink control information provided by an embodiment of the present application, and the method can be applied to a terminal device. The method includes the following steps.

[0072] Step 210: receiving downlink control information, where the downlink control information is sent based on whether the terminal device is a multi-card terminal device.

[0073] The terminal device includes at least two user identification cards, or the terminal device corresponds to at least two user identification cards, or the terminal device is equipped with at least two user identification cards.

[0074] The user identification card is an IC (Integrated Circuit Card) card used to identify mobile users in a mobile communication system. The user identification card can be at least one of a SIM, a USIM (Universal Subscriber Identity Module), and an eSIM (embedded-SIM). The at least two user identification cards on the terminal device can be the same type of user identification cards or different types of user identification cards.

[0075] At least two user identification cards on the terminal device can work in the network state (connected state) at the same time; or, only one user identification card can work in the network state at the same time (other user identification cards are in offline state); or, at least one user identification card can work in the network state at the same time.

[0076] A user identification card in a networked state can maintain a connection with the network to send and receive data.

[0077] The user identification card in the offline state cannot send data with the network, and / or the user identification card in the offline state cannot receive data sent by the network. Alternatively, when the transmission link (uplink and / or downlink) between the user identification card and the network is unavailable, the user identification card is in the offline state; when the connection between the user identification card and the network is disconnected, the user identification card is in the offline state.

[0078] Optionally, when the terminal device has at least two RF transmitting paths and at least two RF receiving paths, at least two user identification cards can send and receive data simultaneously; when the terminal device has at least two RF receiving paths, at least two user identification cards can receive data simultaneously; when the terminal device has only one RF receiving path, only one user identification card can receive data at the same time; when the terminal device has at least two RF transmitting paths, at least two user identification cards can send data simultaneously; when the terminal device has only one RF transmitting path, only one user identification card can send data at the same time.

[0079] Taking the terminal device including two user identification cards: a first user identification card and a second user identification card as an example, the terminal device can be a terminal device supporting dual-SIM dual standby, a terminal device supporting dual-hand dual-SIM dual standby, or a terminal device supporting dual-SIM dual activation.

[0080] The method provided in the embodiment of the present application is applicable to any of the above-mentioned terminal devices.

[0081] At least two subscriber identity cards can access the same network (network device). For example, the terminal device establishes a connection with the first network (first network device) through SIM1 and SIM2, and the terminal device can communicate with the first network (first network device) through SIM1 or SIM2.

[0082] Or, at least two user identification cards can access different networks (network devices). For example, the terminal device establishes a connection with the first network (first network device) through SIM1, and the terminal device can communicate with the first network (first network device) through SIM1; the terminal device establishes a connection with the second network (second network device) through SIM2, and the terminal device can communicate with the second network (second network device) through SIM2.

[0083] Then, step 210 may be that the terminal device receives downlink control information (DCI) sent by the network device through at least one user identification card.

[0084] For example, the terminal device includes a first user identification card and a second user identification card; the first user identification card is used to access the first network, and the first user identification card establishes a connection with a first network device of the first network; the second user identification card is used to access the second network, and the second user identification card establishes a connection with a second network device of the second network. When the first network and the second network are the same network, the first network device and the second network device can be the same network device under the same network, or can be different network devices under the same network. The first network device and the second network device can be access network devices.

[0085] Based on the above examples, the terminal equipment can receive the DCI sent by the first network equipment through the first subscriber identification card, and the DCI is used to schedule the communication of the first subscriber identification card. And / or, the terminal equipment can receive the DCI sent by the first network equipment through the first subscriber identification card, and the DCI is used to schedule the communication of the second subscriber identification card. Or, the terminal equipment can receive the DCI sent by the second network equipment through the second subscriber identification card, and the DCI is used to schedule the communication of the second subscriber identification card. Or, the terminal equipment can receive the DCI sent by the second network equipment through the second subscriber identification card, and the DCI is used to schedule the communication of the first subscriber identification card.

[0086] DCI is sent by the network device according to the device type of the terminal device. When the terminal device is a multi-card terminal device, in order to prevent some user identification cards from being offline and unable to perform downlink communication, the network device can send DCI to the terminal device using the DCI sending method for multi-card terminal devices.

[0087] For example, the network device may not send DCI to the first user identification card when the first user identification card is in an offline state, and then send DCI to the first user identification card when the first user identification card is restored to a connected state.

[0088] Alternatively, the network device may configure the DCI of the first subscriber identity card to the second subscriber identity card in the connected state when the first subscriber identity card is in the offline state.

[0089] Alternatively, when configuring the DCI to switch the BWP (Bandwidth Part) of the first subscriber identity card, the network device may repeatedly send the DCI on the original BWP to prevent the first subscriber identity card from missing the DCI.

[0090] The terminal device performs downlink transmission with the network device according to the configuration in the DCI.

[0091] In summary, the method provided in this embodiment can, when the terminal device is a multi-card terminal device supporting multiple user identification cards, allow the network device to determine the transmission mode of the downlink control information according to the multi-card terminal device, thereby preventing the user identification card in the offline state from missing the downlink control information sent by the network device. This prevents the user identification card in the offline state from reoccupying the transceiver path and causing a network connection failure due to a change in the scheduling resources on the network side.

[0092] Please refer to Figure 6 , which shows a flow chart of a method for transmitting downlink control information provided by an embodiment of the present application, and the method can be applied in a network device. The method includes the following steps.

[0093] Step 310: Send downlink control information. The downlink control information is sent according to the terminal device being a multi-card terminal device. The terminal device includes at least two user identification cards.

[0094] Exemplarily, the at least two user identification cards include a first user identification card and a second user identification card. The network device may be a first network device accessed by the terminal device through the first user identification card, and the network device may be a second network device accessed by the terminal device through the second user identification card. The first network device and the second network device may be the same device or different devices.

[0095] Optionally, when the terminal device is a multi-card terminal device, the network device sends DCI using the DCI sending method corresponding to the multi-card terminal device.

[0096] Alternatively, the network device sends the DCI according to the network connection status of at least two user identification cards in the terminal device, where the network connection status includes an online status and an offline status.

[0097] The downlink control information is used to configure the communication of at least one of the at least two user identification cards. For example, if the terminal device includes a first user identification card and a second user identification card, the downlink control information can be used to configure the communication of the first user identification card, the downlink control information can also be used to configure the communication of the second user identification card, and the downlink control information can also be used to configure the communication of the first user identification card and the second user identification card.

[0098] When the network device sends the DCI carrying the configuration information of the second subscriber identification card to the first subscriber identification card, the DCI carries the identifier of the second subscriber identification card to indicate that the DCI carries the configuration information of the second subscriber identification card.

[0099] The network device performs downlink transmission with the terminal device according to the configuration in the DCI.

[0100] In summary, the method provided in this embodiment can, when the terminal device is a multi-card terminal device supporting multiple user identification cards, allow the network device to determine the transmission mode of the downlink control information according to the multi-card terminal device, thereby preventing the user identification card in the offline state from missing the downlink control information sent by the network device. This prevents the user identification card in the offline state from reoccupying the transceiver path and causing a network connection failure due to a change in the scheduling resources on the network side.

[0101] In an optional implementation, when one subscriber identity card is offline and there is a message path between the home networks of the two subscriber identity cards, the DCI of the offline subscriber identity card can be received by the online subscriber identity card.

[0102] Please refer to Figure 7 , which shows a flow chart of a method for transmitting downlink control information provided by an embodiment of the present application, and the method can be applied to a terminal device. The method includes the following steps.

[0103] Step 401: The terminal device reports terminal capabilities to the first network device through the first user identification card. The terminal capabilities carry a multi-card terminal identifier or another user identification card identifier (second user identification card identifier).

[0104] Optionally, during the process of establishing connections with respective networks, user identification cards of multi-card terminal devices may indicate, through terminal capability reporting and other means, that the terminal to which the user identification card belongs is a multi-card terminal device, and may indicate the multi-card terminal device identifier to which the user identification card belongs or the identifiers of other user identification cards in the multi-card terminal device; when the terminal device decides to requisition the receiving and sending resources used by a certain user identification card for other user identification cards in the multi-card terminal device based on the priority, service and other factors of each user identification card in the device, the method provided in the embodiment of the present application may utilize network-side assistance to prevent the user identification card from missing the DCI containing key information (such as partial bandwidth switching (BWP Switch)) that "affects connection recovery".

[0105] The terminal device sends terminal capability information to the network device, where the terminal capability information includes first indication information, and the first indication information is used to indicate that the terminal device supports multiple user identification cards.

[0106] Exemplarily, the terminal capability information further includes at least one of the following: a device identifier of the terminal device, and user identification card identifiers of at least two user identification cards.

[0107] The terminal device notifies the network side by means of terminal capability reporting and other methods, and marks the user identification card as a multi-card terminal device. For example, during the registration process or the process of establishing a connection with the network, the user identification card adds multi-card terminal device indication information in the terminal capability (UE Capability) reporting message. The multi-card terminal device indication information includes but is not limited to the multi-card terminal device indication, the terminal device unique number, the identification numbers of other user identification cards in the multi-card terminal device, etc. For example, the identification numbers of other user identification cards may be MEID (Mobile Equipment Identifier), SN (Serial Number), IMEI (International Mobile Equipment Identity), and IMSI (International Mobile Subscriber Identity).

[0108] For example, terminal capability information includes:

[0109] UE-MUSIM-Capability::=SEQUENCE{

[0110] multiSimDevice supported (supports multi-card terminal devices),

[0111] deviceId (device ID),

[0112] MEID,

[0113] SN,

[0114] IMEI,

[0115] IMSI,

[0116] }.

[0117] The network device marks that the user identification card comes from a multi-card terminal device; and stores the multi-card terminal device identifier as a basis for indexing and associating the user identification card.

[0118] Step 402: The terminal device reports terminal capabilities to the second network device through the second subscriber identification card. The terminal capabilities carry a multi-card terminal identifier or another subscriber identification card identifier (first subscriber identification card identifier).

[0119] Step 403: The network device (the first network device and the second network device) records that the terminal device is a multi-card terminal device, and stores the terminal identifier or other user identification card identifier.

[0120] The network device associates and stores the indication information of the multi-card terminal device, the terminal device identifier, and the user identification card identifier according to the terminal capability information reported by each user identification card.

[0121] Step 404: The first network device sends the DCI of the first subscriber identity card.

[0122] Step 405: The first network device performs data transmission according to the DCI of the first subscriber identity card.

[0123] Step 406: The terminal device decides to allocate resources (RF receiving path) to the second subscriber identity card according to the subscriber identity card and service priority.

[0124] Step 407: The terminal device sends a resource occupied indication to the first network device via the first user identification card.

[0125] The user identification card whose resources are requisitioned notifies the network to which the user identification card belongs, indicating that the user identification card is about to lose its sending and receiving resources and enter an offline state.

[0126] In the case that the first subscriber identity card is about to lose the receiving and sending resources of the terminal device, the terminal device sends a resource occupation indication, where the resource occupation indication is used to instruct the first subscriber identity card to enter an offline state.

[0127] The first network device receives a resource occupation indication, where the resource occupation indication is used to instruct the first subscriber identity card to enter an offline state.

[0128] Optionally, for the user identification card whose resources are preempted, the network side can consider suspending the scheduling of DCI transmission to save resources. The network side temporarily stops configuring relevant DCI information for the user identification card that is offline until it receives a connection recovery indication from the user identification card or the connection recovery timer between the network and the user times out, and then the network side reconfigures DCI for the user identification card.

[0129] That is, upon receiving the resource occupation indication sent by the first SIM card, the first network device suspends configuring DCI for the first SIM card. Alternatively, the first network device starts an offline timer and stops configuring DCI for the first SIM card before the offline timer expires.

[0130] That is, when receiving the resource occupation indication from the first subscriber identity card, the first network device starts the second timer; before the second timer expires, the first network device does not send the downlink control information of the first subscriber identity card.

[0131] The first user identification card releases resources (radio frequency receiving path) and enters the offline state. The second user identification card occupies resources (radio frequency receiving path) and enters the online state.

[0132] Step 408: The second network device performs DCI or data transmission with the second subscriber identity card.

[0133] Step 409: When the first network device needs to transmit the DC of the first subscriber identity card, the first network device transmits the DCI of the first subscriber identity card to the second network device.

[0134] The network side decides to configure DCI for the user identification card with multiple terminal device identifiers based on the scheduling mechanism, business requirements, etc., which contains key control information that affects the connection recovery between the user identification card and the network. Once missed, the wireless link will fail.

[0135] When the first SIM card is offline, the first network device sends the DCI of the first SIM card to the second network device. The second network device sends the downlink control information of the first SIM card to the second SIM card. The downlink control information carries the indication information of the first SIM card.

[0136] When the network recognizes that there are message paths between different networks to which multiple user identification cards of the terminal device belong, or that multiple user identification cards in the terminal device belong to the same network and the user identification card is offline, the key control information that needs to be updated is forwarded to other user identification cards with the terminal device identifier that are connected to the network, and the user identification card in the connected state forwards the relevant information to the user identification card in the offline state through the internal mechanism of the terminal device. When the user identification card in the offline state reoccupies the terminal's transceiver resources, it uses the configuration information forwarded by the terminal to restore the connection with the network.

[0137] For example, Figure 8 As shown, when SIM1 is in an offline state, SIM1 cannot communicate with network 1, network 1 transmits DCI to network 2, network 2 transmits DCI to SIM2 in an online state, and SIM2 then updates SIM1's DCI to SIM1's configuration.

[0138] The network device notifies the offline user identification card of the key control information that affects the connection between the user identification card and the network through the connection between other user identification cards of the multi-card terminal device and the network: identifies the key control information sent to the offline user (SIM1), indexes other available connections between the network and the multi-card terminal device according to the multi-card terminal device identification, etc., and forwards the key control information sent to SIM1 to the associated user (SIM2) on the same terminal device; the multi-card terminal device parses the configuration information about SIM1 received by the associated user (SIM2) and updates it to the offline user (SIM1).

[0139] Optionally, when the first user identification card is in an offline state and there is a message path between the first network and the second network, the first network device sends the DCI of the first user identification card to the second network device. The second network device sends the downlink control information of the first user identification card to the second user identification card;

[0140] Or, when the first SIM card is offline and the first network and the second network are the same network, the first network device sends the DCI of the first SIM card to the second network device. The second network device sends the downlink control information of the first SIM card to the second SIM card.

[0141] Step 410: The second network device sends the DCI of the first subscriber identity card.

[0142] Step 411: the terminal device uses the mask of the second subscriber identity card to parse the DCI received in step 410, and updates the configuration of the first subscriber identity card according to the parsed DCI of the first subscriber identity card.

[0143] When the first user identification card is in an offline state, the terminal device receives downlink control information of the first user identification card through the second user identification card. The downlink control information carries indication information of the first user identification card.

[0144] Optionally, when the first user identification card is in an offline state and there is a message path between the first network and the second network, the terminal device receives the downlink control information of the first user identification card through the second user identification card.

[0145] Or, when the first user identification card is in an offline state and the first network and the second network are the same network, the terminal device receives the downlink control information of the first user identification card through the second user identification card.

[0146] Optionally, the second network device may carry the DCI of the first user identification card through an RRC (Radio Resource Control) message / DCI / PDSCH (Physical Downlink Shared Channel). For example, the second user identification card receives an RRC message sent by the second network device, and the RRC message carries the DCI of the first user identification card. Alternatively, the second user identification card receives the DCI of the second user identification card sent by the second network device, and the DCI of the second user identification card carries the DCI of the first user identification card. Alternatively, the second user identification card receives the PDSCH sent by the second network device, and the PDSCH carries the DCI of the first user identification card.

[0147] The terminal device internally shares information parsed from multiple user identification cards: through the user identification card (SIM2) that maintains a connection with the network, the terminal device receives information sent by the network to the offline user (SIM1) who has lost network connection. The terminal device updates or notifies the user (SIM1) of the received information of the offline user (SIM1) through the device's internal mechanism, such as internal messages, internal databases, etc.

[0148] For example, Fig. 9 As shown, SIM2 of the multi-card terminal device 420 monitors and parses the information sent by the network; and updates the configuration or database of the corresponding user (SIM1) according to the detected configuration information sent to other users in the terminal device.

[0149] Step 412: The terminal device decides to allocate resources (RF receiving path) to the first subscriber identity card according to the subscriber identity card and service priority.

[0150] The second user identification card releases resources (radio frequency receiving path) and enters the offline state. The first user identification card occupies resources (radio frequency receiving path) and enters the online state.

[0151] Step 413: The network device receives the resource recovery indication actively fed back by the first subscriber identity card, and recovers the DCI configuration of the first subscriber identity card. Alternatively, the network device recovers the DCI configuration of the first subscriber identity card after the offline timer times out.

[0152] When the first user identification card obtains the receiving and sending resources of the terminal device, a resource recovery indication is sent, where the resource recovery indication is used to indicate that the first user identification card is in a networked state.

[0153] The first network device receives a resource recovery indication, where the resource recovery indication is used to indicate that the first subscriber identity card is in a network connection state.

[0154] The network device resumes the transmission of DCI according to the resource recovery indication and / or the offline timer, restores the scheduling / communication connection for the user identification card that has regained the resource as soon as possible, and avoids resource hanging caused by the user identification card's offline time exceeding the tolerance range.

[0155] Step 414: The network device sends the DCI of the first subscriber identity card.

[0156] Step 415: The terminal device performs DCI analysis through the first subscriber identity card according to other subscriber identity cards (DCI forwarded by the second subscriber identity card) during the offline period.

[0157] Step 416: The first network device sends data transmission related to the DCI indication.

[0158] Step 417: The terminal device receives data according to the DCI indication through the first user identification card.

[0159] For example, Fig.10 As shown, the process 430 of a multi-card terminal device accessing a network is shown. The terminal capability report indicates that the terminal device is a multi-card terminal device, and can carry multi-card terminal device related information, such as the terminal device number (device identification), the unique identification of other user identification cards in the terminal device, etc.; the network side determines the index / addressing of other user identification cards of the same multi-card terminal device and the connection of other user identification cards to the network through the reported information; if the direct connection between the network and the user identification card is not available, the key control information configured for the user identification card is forwarded to the user identification card through the connection between the network and other user identification cards of the same terminal device.

[0160] To sum up, the method provided in this embodiment utilizes the characteristic that there are multiple connections between a multi-card terminal device and a network. When the direct connection between a user identification card and the network is unavailable, the key control information can be indirectly notified to the user identification card that is offline through the connection between other user identification cards in the terminal device and the network.

[0161] In another optional implementation, when the network device wants to switch the BWP of the subscriber identity card, the DCI may be repeatedly sent on the original BWP.

[0162] Please refer to Fig.11 , which shows a flow chart of a method for transmitting downlink control information provided by an embodiment of the present application, and the method can be applied to a terminal device. The method includes the following steps.

[0163] Step 501: The terminal device reports terminal capabilities to the first network device through the first user identification card. The terminal capabilities carry a multi-card terminal identifier or another user identification card identifier (second user identification card identifier).

[0164] Step 502: The terminal device reports terminal capabilities to the second network device through the second subscriber identification card. The terminal capabilities carry a multi-card terminal identifier or another subscriber identification card identifier (first subscriber identification card identifier).

[0165] Step 503: The network device (the first network device and the second network device) records that the terminal device is a multi-card terminal device, and stores the terminal identifier or other user identification card identifier.

[0166] Step 504: The first network device sends the DCI of the first subscriber identity card.

[0167] Step 505: The terminal device receives the DCI sent by the first network device through the first subscriber identity card, and parses the DCI using the mask of the first subscriber identity card.

[0168] Step 506: The first network device performs data transmission according to the DCI of the first subscriber identity card.

[0169] Step 507: The terminal device receives downlink data sent by the first network device through the first user identification card according to the DCI instruction.

[0170] Step 508: The terminal device decides to allocate resources (RF receiving path) to the second subscriber identity card according to the subscriber identity card and service priority.

[0171] The first user identification card releases resources (radio frequency receiving path) and enters the offline state. The second user identification card occupies resources (radio frequency receiving path) and enters the online state.

[0172] Optionally, in the case that the first user identification card is about to lose the receiving and sending resources of the terminal device, the terminal device sends a resource occupation indication through the first user identification card, and the resource occupation indication is used to instruct the first user identification card to enter an offline state.

[0173] The first network device receives a resource occupation indication, where the resource occupation indication is used to instruct the first subscriber identity card to enter an offline state.

[0174] Optionally, the first network device may also start a second timer when receiving the resource occupation indication from the first subscriber identification card; and not send the downlink control information of the first subscriber identification card before the second timer expires.

[0175] Step 509: The second network device performs DCI or data transmission with the second subscriber identity card.

[0176] The terminal device receives and parses the DCI, or receives downlink data, through the second user identification card.

[0177] Step 510: When the first network device needs to change the scheduling resource (such as BWP) of the first subscriber identity card, the first network device notifies the first subscriber identity card of the scheduling resource change through the original resource (such as original BWP) of the first subscriber identity card.

[0178] Since the first subscriber identity card is currently in an offline state, the first subscriber identity card cannot receive the DCI of the switching scheduling resource.

[0179] Step 511: The first network device starts scheduling the first subscriber identity card on the new resource.

[0180] The first network device sends the transmission data on the new BWP.

[0181] Since the first user identification card is currently offline, it cannot receive the schedule.

[0182] Step 512: The first network device identifies that the terminal device is a multi-card terminal device, starts an offline timer, and continues to configure DCI on the original resources to indicate changes in scheduling resources.

[0183] Optionally, if the network does not have / cannot identify other connection paths between the terminal device where the user identification card is located and the network, and the key control information contains the content of the scheduling time-frequency resource format update, the network maintains the original format and continues to configure DCI information for the user identification card on the original time-frequency resource (such as the original BWP), and the DCI contains key control information that affects the connection recovery, until the user identification card detects feedback related to the DCI content, or the relevant timer times out. For example: when the network decides to switch the assigned BWP for the user identification card of a multi-card terminal device, after switching the BWP scheduled by the user identification card, it still maintains the DCI transmission containing the BWP switch for the user identification card on the original BWP for a period of time (configured timer) until the feedback from the user identification card is received on the new BWP, or the configured timer times out.

[0184] In the case where no other network connection between the network and the multi-card terminal device is identified, if the key control information to be sent to the user identification card includes a scheduling resource update, the network updates the scheduling time and frequency resources (such as BWP Switch) for the user identification card of the multi-card terminal device, and configures DCI for the user on the new and old sets of resources:

[0185] 1. After the network device notifies the user identification card of the updated time-frequency resource location, the network side starts to schedule the user identification card on the new resources (such as the new BWP after switching), while continuing to notify the user identification card on the original time-frequency resources (such as the original BWP): the time-frequency resources scheduled by the network have been updated to prevent the user identification card from being offline and missing the resource update notification. When the transceiver channel is restored, the connection with the network cannot be restored through the original time-frequency resources (such as the original BWP).

[0186] 2. After the offline user identification card regains the right to use the receiving and transmitting channels of the terminal device, it monitors the DCI on the original time-frequency resources, parses the time-frequency resources and finds that the time-frequency resources have been updated (such as BWP Switch), and then monitors the DCI on the new time-frequency resources and receives data according to the new DCI. After the network side receives the feedback from the user identification card on the data reception scheduled on the new time-frequency resources, or the offline timer that can tolerate the user's offline timer expires, it stops configuring the DCI containing the time-frequency resource update (such as BWP Switch) for the user identification card on the original time-frequency resources.

[0187] Optionally, the first network device repeatedly sends downlink control information on the original BWP of the first subscriber identity card, where the downlink control information is used to switch the BWP of the first subscriber identity card to a new BWP.

[0188] Optionally, the first network device repeatedly sends DCI on the original BWP in at least one of the following situations. At least one of the following situations includes: the terminal device includes at least two user identification cards; the terminal is a multi-card terminal device; the first user identification card is in an offline state; before the first timer times out, the first timer is started when the network device sends downlink control information for the first time; there is no message path between the first network and the second network, and the first network and the second network are different networks; before the network device receives feedback information for data transmission on the new BWP.

[0189] The terminal device decides to allocate resources (RF receiving path) to the first SIM card based on the SIM card and service priority. The second SIM card releases resources (RF receiving path) and goes offline to enter the offline state. The first SIM card occupies resources (RF receiving path) and enters the online state.

[0190] Step 513: The terminal device detects DCI on the original resource through the first user identification card, updates resource information, and monitors DCI on the new resource.

[0191] Exemplarily, the original resources include PDCCH (Physical Downlink Control Channel) monitoring resources on the original BWP of the terminal device. The new resources include PSCCH monitoring resources on the new BWP of the terminal device. Alternatively, the original resources include resources on the original BWP of the terminal device, and the new resources include resources on the new BWP of the terminal device.

[0192] The terminal device receives, through the first subscriber identity card, downlink control information repeatedly sent by the network device on the original partial bandwidth BWP of the first subscriber identity card, and the downlink control information is used to switch the BWP of the first subscriber identity card to a new BWP.

[0193] The downlink control information is sent by the network device in at least one of the following situations: the terminal device includes at least two user identification cards; the terminal device is a multi-card terminal device; the first user identification card is in an offline state; before the first timer times out, the first timer is started when the network device sends the downlink control information for the first time; there is no message path between the first network and the second network, and the first network and the second network are different networks; before the network device receives feedback information for data transmission on the new BWP.

[0194] Step 514: The terminal device detects DCI on the new resource and receives relevant data according to the DCI.

[0195] Step 515: The first network device restores the DCI configuration for the first user identification card after the offline timer times out, or the first network device restores the DCI configuration for the first user identification card when receiving the data reception feedback sent by the first user identification card. The first network device stops configuring DCI for the first user identification card on the original resource.

[0196] The terminal device sends feedback information through the first user identification card, and the feedback information is used to feedback the data reception status of the terminal device on the new BWP; wherein the feedback information is used to trigger the network device to stop repeatedly sending downlink control information on the original BWP.

[0197] After the first timer times out, the first network device stops repeatedly sending downlink control information on the first time-frequency resource.

[0198] The first network device can also receive feedback information sent by the terminal device, where the feedback information is used to feedback the data reception status of the terminal device on the second time-frequency resource; when the feedback information is received, the first network device stops repeatedly sending downlink control information on the first time-frequency resource.

[0199] When the first SIM card obtains the receiving and sending resources of the terminal device, the terminal device sends a resource recovery indication to the first network device through the first SIM card, and the resource recovery indication is used to indicate that the first SIM card is in a networked state. After receiving the resource recovery indication, the first network device stops repeatedly sending DCI on the original BWP.

[0200] Step 516: The terminal device resumes normal DCI or data transmission through the first user identification card.

[0201] For example, Fig.12 As shown, the network side 440 decides to update the time-frequency resources used by the user identification card, such as the BWP used, notifies the time-frequency resource switch and starts scheduling users on the new resources (DCI and data information transmission on the new resources), and based on the multi-card terminal device identifier of the user identification card, the user identification card continues to maintain DCI transmission for a certain period of time on the old time-frequency resources, which includes a time-frequency resource switching notification; after receiving feedback from the user identification card on the new resources, or the offline timer times out, the network side stops DCI transmission on the old resources.

[0202] To summarize, the method provided in this embodiment is designed to configure two sets of DCI for the user identification card on the new and old resources in order to address the situation where the available connection between the multi-card terminal device and the network cannot be identified (there is no available indirect transmission path) and the user identification card is triggered by the time-frequency resource position switch (such as BWP Switch). When the time-frequency resource position switch takes effect, in addition to conventionally scheduling the user identification card on the new resources, the network side also maintains resource switching notifications for the user identification card on the old resources.

[0203] The method provided in this embodiment prevents a multi-card terminal device that shares a transceiver channel from missing downlink control information from the network due to losing direct connection with the network when the channel is occupied by other user identification cards.

[0204] The method provided in this embodiment avoids the situation where, after the user identification card reoccupies the transceiver path of the multi-card terminal device, the DCI configured by the network cannot be monitored on the old scheduling resources because the scheduling resources on the network side have been switched, resulting in failure of network connection recovery.

[0205] The method provided in this embodiment avoids the situation where, after the user identification card reoccupies the transceiver path of the multi-card terminal device, it needs to perform DCI detection at a certain interval to guess whether the scheduling resource location has been switched during the user's offline period, thereby causing corresponding delays and inaccurate judgments.

[0206] The method provided in this embodiment avoids the need for the subscriber identity card to perform a series of traversal detection processes due to the inability to obtain the key content of the missed DCI, thereby reducing the communication delay between the subscriber identity card and the network device.

[0207] With the method provided in this embodiment, the user identification card can accurately receive and parse the configuration on the network side by configuring control information on multiple device connections and / or multiple groups of resources, without the need for additional monitoring and detection, thereby saving power consumption.

[0208] It should be noted that the method steps in the above embodiments can be arbitrarily combined to obtain new embodiments, and this application does not impose any limitation on this.

[0209] Fig.13 A structural block diagram of a transmission device for downlink control information provided by an exemplary embodiment of the present application is shown. The device can be implemented as a terminal device, or implemented as a part of a terminal device. The device includes at least two user identification cards. The device includes:

[0210] The first receiving module 802 is used to receive downlink control information, where the downlink control information is sent according to the terminal device being a multi-card terminal device.

[0211] In an optional embodiment, the at least two user identification cards include a first user identification card and a second user identification card;

[0212] The first receiving module 802 is configured to receive the downlink control information of the first subscriber identification card through the second subscriber identification card when the first subscriber identification card is in an offline state.

[0213] In an optional embodiment, the first user identification card is used to access a first network, and the second user identification card is used to access a second network;

[0214] A first receiving module 802, configured to receive the downlink control information of the first user identification card through the second user identification card when there is a message path between the first network and the second network;

[0215] Alternatively, the first receiving module 802 is configured to receive the downlink control information of the first subscriber identification card through the second subscriber identification card when the first network and the second network are the same network.

[0216] In an optional embodiment, the downlink control information carries indication information of the first user identification card.

[0217] In an optional embodiment, the at least two user identification cards include a first user identification card;

[0218] The first receiving module 802 is used to receive, through the first subscriber identity card, the downlink control information repeatedly sent by the network device on the original partial bandwidth BWP of the first subscriber identity card, wherein the downlink control information is used to switch the BWP of the first subscriber identity card to a new BWP.

[0219] In an optional embodiment, the at least two user identification cards further include a second user identification card; the first user identification card is used to access the first network, and the second user identification card is used to access the second network;

[0220] The downlink control information is sent by the network device in at least one of the following situations:

[0221] The terminal device includes at least two user identification cards;

[0222] The terminal device is a multi-card terminal device;

[0223] The first user identification card is in an offline state;

[0224] Before the first timer times out, the first timer is started when the network device sends the downlink control information for the first time;

[0225] There is no message path between the first network and the second network, and the first network and the second network are different networks;

[0226] Before the network device receives feedback information for data transmission on the new BWP.

[0227] In an optional embodiment, the device further comprises:

[0228] A first sending module 801 is used to send feedback information, where the feedback information is used to feed back the data reception status of the terminal device on the new BWP;

[0229] The feedback information is used to trigger the network device to stop repeatedly sending the downlink control information on the original BWP.

[0230] In an optional embodiment, the at least two user identification cards include a first user identification card; and the device further includes:

[0231] The first sending module 801 is used to send a resource occupation indication when the first subscriber identity card is about to lose the receiving and sending resources of the terminal device, wherein the resource occupation indication is used to indicate that the first subscriber identity card enters an offline state.

[0232] In an optional embodiment, the at least two user identification cards include a first user identification card; and the device further includes:

[0233] The first sending module 801 is used to send a resource recovery indication when the first subscriber identification card obtains the receiving and sending resources of the terminal device, and the resource recovery indication is used to indicate that the first subscriber identification card is in a networked state.

[0234] In an optional embodiment, the device further comprises:

[0235] The first sending module 801 is used to send terminal capability information, where the terminal capability information includes first indication information, and the first indication information is used to indicate that the terminal device supports multiple user identification cards.

[0236] In an optional embodiment, the terminal capability information further includes at least one of the following: a device identification of the terminal device, and user identification card identifications of the at least two user identification cards.

[0237] Fig.14 A structural block diagram of a transmission device for downlink control information provided by an exemplary embodiment of the present application is shown. The device can be implemented as a network device, or implemented as a part of a network device. The device includes:

[0238] The second sending module 803 is used to send downlink control information, where the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two subscriber identification cards.

[0239] In an optional embodiment, the at least two user identification cards include a first user identification card and a second user identification card;

[0240] The second sending module 803 is configured to send the downlink control information of the first subscriber identification card to the second subscriber identification card when the first subscriber identification card is in an offline state.

[0241] In an optional embodiment, the first user identification card is used to access a first network, and the second user identification card is used to access a second network;

[0242] A second sending module 803 is used to send the downlink control information of the first subscriber identity card to the second subscriber identity card when there is a message path between the first network and the second network;

[0243] Or, the second sending module 803 is used to send the downlink control information of the first subscriber identification card to the second subscriber identification card when the first network and the second network are the same network.

[0244] In an optional embodiment, the downlink control information carries indication information of the first user identification card.

[0245] In an optional embodiment, the at least two user identification cards include a first user identification card;

[0246] The second sending module 803 is used to repeatedly send the downlink control information on the original BWP of the first subscriber identity card, where the downlink control information is used to switch the BWP of the first subscriber identity card to a new BWP.

[0247] In an optional embodiment, the at least two user identification cards further include a second user identification card; the first user identification card is used to access the first network, and the second user identification card is used to access the second network;

[0248] The downlink control information is sent by the network device in at least one of the following situations:

[0249] The terminal device includes at least two user identification cards;

[0250] The terminal is a multi-card terminal device;

[0251] The first user identification card is in an offline state;

[0252] Before the first timer times out, the first timer is started when the network device sends the downlink control information for the first time;

[0253] There is no message path between the first network and the second network, and the first network and the second network are different networks;

[0254] Before the network device receives feedback information for data transmission on the new BWP.

[0255] In an optional embodiment, the second sending module 803 is used to stop repeatedly sending the downlink control information on the first time-frequency resource after the first timer times out.

[0256] In an optional embodiment, the second sending module 803 is configured to send transmission data on the new BWP.

[0257] In an optional embodiment, the device further comprises:

[0258] A second receiving module 804 is used to receive feedback information sent by the terminal device, where the feedback information is used to feed back data reception status of the terminal device on the second time-frequency resource;

[0259] The second sending module 803 is configured to stop repeatedly sending the downlink control information on the first time-frequency resource when receiving the feedback information.

[0260] In an optional embodiment, the at least two user identification cards include a first user identification card; and the device further includes:

[0261] The second receiving module 804 is used to receive a resource occupation indication, where the resource occupation indication is used to indicate that the first subscriber identity card enters an offline state.

[0262] In an optional embodiment, the at least two user identification cards include a first user identification card;

[0263] The second sending module 803 is configured to start a second timer upon receiving the resource occupation indication from the first subscriber identification card; and not send the downlink control information from the first subscriber identification card before the second timer expires.

[0264] In an optional embodiment, the at least two user identification cards include a first user identification card; and the device further includes:

[0265] The second receiving module 804 is used to receive a resource recovery indication, where the resource recovery indication is used to indicate that the first subscriber identity card is in a network connection state.

[0266] In an optional embodiment, the method further includes:

[0267] The second receiving module 804 is used to receive terminal capability information of the terminal device, where the terminal capability information includes first indication information, and the first indication information is used to indicate that the terminal device supports multiple subscriber identification cards.

[0268] In an optional embodiment, the terminal capability information further includes at least one of the following: a device identification of the terminal device, and user identification card identifications of the at least two user identification cards.

[0269] Fig.15 A schematic diagram of the structure of a communication device (terminal device or network device) provided by an exemplary embodiment of the present application is shown. The communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104 and a bus 105.

[0270] The processor 101 includes one or more processing cores. The processor 101 executes various functional applications and information processing by running software programs and modules.

[0271] The receiver 102 and the transmitter 103 may be implemented as a communication component, which may be a communication chip, and the communication component may be called a transceiver.

[0272] The memory 104 is connected to the processor 101 via a bus 105 .

[0273] The memory 104 may be used to store at least one instruction, and the processor 101 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0274] In addition, the memory 104 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 electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[0275] Among them, when the communication device is implemented as a terminal device, the processor and transceiver in the communication device involved in the embodiments of the present application can execute the steps performed by the terminal device in any of the methods shown above, which will not be repeated here.

[0276] In a possible implementation manner, when the communication device is implemented as a terminal device,

[0277] The transceiver is used to send the terminal capability information of the first frequency band combination to the network device, where the first frequency band combination includes the working frequency bands when at least two user identification cards work simultaneously, and the terminal device includes the at least two user identification cards.

[0278] In another possible implementation, when the communication device is implemented as a network device,

[0279] The transceiver is used to receive terminal capability information of a first frequency band combination sent by a terminal device, the terminal device includes at least two user identification cards, and the first frequency band combination includes working frequency bands when the at least two user identification cards work simultaneously.

[0280] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the method for transmitting downlink control information performed by a communication device provided in the above-mentioned various method embodiments.

[0281] In an exemplary embodiment, a chip is also provided, which includes a programmable logic circuit and / or program instructions. When the chip runs on a communication device, it is used to enable the communication device to implement the method for transmitting downlink control information described in the above aspects.

[0282] In an exemplary embodiment, a computer program product is further provided. When the computer program product is executed on a processor of a communication device, the communication device executes the method for transmitting downlink control information described in the above aspects.

[0283] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0284] 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 transmitting downlink control information, characterized in that: The method is performed by a terminal device, the terminal device includes at least two user identification cards, and the method includes: Downlink control information is received, where the downlink control information is sent according to the terminal device being a multi-card terminal device.

2. The method according to claim 1, characterized in that The at least two user identification cards include a first user identification card and a second user identification card; The receiving downlink control information comprises: When the first subscriber identification card is in an offline state, the downlink control information of the first subscriber identification card is received through the second subscriber identification card.

3. The method according to claim 2, characterized in that The first user identification card is used to access the first network, and the second user identification card is used to access the second network; The receiving, by the second user identification card, the downlink control information of the first user identification card comprises: In the case where there is a message path between the first network and the second network, receiving the downlink control information of the first user identification card through the second user identification card; Or, when the first network and the second network are the same network, the downlink control information of the first subscriber identification card is received through the second subscriber identification card.

4. The method according to claim 2 or 3, characterized in that: The downlink control information carries indication information of the first user identification card.

5. The method according to claim 1, characterized in that The at least two user identification cards include a first user identification card; The receiving downlink control information comprises: The downlink control information repeatedly sent by the network device on the original partial bandwidth BWP of the first subscriber identification card is received through the first subscriber identification card, and the downlink control information is used to switch the original BWP of the first subscriber identification card to a new BWP.

6. The method according to claim 5, characterized in that The at least two user identification cards also include a second user identification card; the first user identification card is used to access the first network, and the second user identification card is used to access the second network; The downlink control information is sent by the network device in at least one of the following situations: The terminal device includes at least two user identification cards; The terminal device is a multi-card terminal device; The first user identification card is in an offline state; Before the first timer times out, the first timer is started when the network device sends the downlink control information for the first time; There is no message path between the first network and the second network, and the first network and the second network are different networks; Before the network device receives feedback information for data transmission on the new BWP.

7. The method according to claim 5 or 6, characterized in that: The method further comprises: Sending feedback information, where the feedback information is used to feedback the data reception status of the terminal device on the new BWP; The feedback information is used to trigger the network device to stop repeatedly sending the downlink control information on the original BWP.

8. The method according to any one of claims 1 to 7, characterized in that: The at least two user identification cards include a first user identification card; the method further includes: In the case where the first subscriber identity card is about to lose the receiving and sending resources of the terminal device, a resource occupation indication is sent, where the resource occupation indication is used to instruct the first subscriber identity card to enter an offline state.

9. The method according to any one of claims 1 to 8, characterized in that: The at least two user identification cards include a first user identification card; the method further includes: When the first subscriber identity card obtains the receiving and sending resources of the terminal device, a resource recovery indication is sent, where the resource recovery indication is used to indicate that the first subscriber identity card is in a networked state.

10. The method according to any one of claims 1 to 9, characterized in that: The method further comprises: Sending terminal capability information, wherein the terminal capability information includes first indication information, and the first indication information is used to indicate that the terminal device supports multiple user identification cards.

11. The method according to claim 10, characterized in that The terminal capability information further includes at least one of the following: a device identification of the terminal device, and user identification card identifications of the at least two user identification cards.

12. A method for transmitting downlink control information, characterized in that: The method is performed by a network device, and the method includes: Sending downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, wherein the terminal device includes at least two user identification cards.

13. The method according to claim 12, characterized in that The at least two user identification cards include a first user identification card and a second user identification card; The sending of downlink control information comprises: When the first subscriber identification card is in an offline state, the downlink control information of the first subscriber identification card is sent to the second subscriber identification card.

14. The method according to claim 13, characterized in that The first user identification card is used to access the first network, and the second user identification card is used to access the second network; The sending the downlink control information of the first user identification card to the second user identification card includes: In the case where there is a message path between the first network and the second network, sending the downlink control information of the first subscriber identity card to the second subscriber identity card; Or, when the first network and the second network are the same network, the downlink control information of the first subscriber identification card is sent to the second subscriber identification card.

15. The method according to claim 13 or 14, characterized in that The downlink control information carries indication information of the first user identification card.

16. The method according to claim 12, characterized in that The at least two user identification cards include a first user identification card; the sending of downlink control information includes: The downlink control information is repeatedly sent on the original BWP of the first subscriber identity card, and the downlink control information is used to switch the BWP of the first subscriber identity card to a new BWP.

17. The method according to claim 16, characterized in that The at least two user identification cards also include a second user identification card; the first user identification card is used to access the first network, and the second user identification card is used to access the second network; The downlink control information is sent by the network device in at least one of the following situations: The terminal device includes at least two user identification cards; The terminal is a multi-card terminal device; The first user identification card is in an offline state; Before the first timer times out, the first timer is started when the network device sends the downlink control information for the first time; There is no message path between the first network and the second network, and the first network and the second network are different networks; Before the network device receives feedback information for data transmission on the new BWP.

18. The method according to claim 17, characterized in that The method further comprises: After the first timer times out, stop repeatedly sending the downlink control information on the first time-frequency resource.

19. The method according to claim 17, characterized in that The method further comprises: The transmission data is sent on the new BWP.

20. The method according to any one of claims 17 to 19, characterized in that: The method further comprises: receiving feedback information sent by the terminal device, where the feedback information is used to feed back data reception status of the terminal device on the second time-frequency resource; When the feedback information is received, stop repeatedly sending the downlink control information on the first time-frequency resource.

21. The method according to any one of claims 12 to 20, characterized in that: The at least two user identification cards include a first user identification card; the method further includes: A resource occupation indication is received, where the resource occupation indication is used to indicate that the first subscriber identity card enters an offline state.

22. The method according to claim 12, characterized in that The at least two user identification cards include a first user identification card; the method further includes: When receiving the resource occupation indication from the first subscriber identity card, starting a second timer; Before the second timer expires, the downlink control information of the first subscriber identity card is not sent.

23. The method according to any one of claims 12 to 22, characterized in that: The at least two user identification cards include a first user identification card; the method further includes: A resource recovery indication is received, where the resource recovery indication is used to indicate that the first subscriber identity card is in a network connection state.

24. The method according to any one of claims 12 to 23, characterized in that: The method further comprises: Terminal capability information of the terminal device is received, where the terminal capability information includes first indication information, and the first indication information is used to indicate that the terminal device supports multiple user identification cards.

25. The method according to claim 24, characterized in that The terminal capability information further includes at least one of the following: a device identification of the terminal device, and user identification card identifications of the at least two user identification cards.

26. A transmission device for downlink control information, characterized in that: The device comprises: The first receiving module is used to receive downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

27. A transmission device for downlink control information, characterized in that: The device comprises: The second sending module is used to send downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

28. A terminal device, characterized in that: The terminal device comprises: a processor and a transceiver connected to the processor; wherein, The transceiver is used to receive downlink control information, wherein the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

29. A network device, characterized in that: The network device comprises: a processor and a transceiver connected to the processor; wherein, The transceiver is used to send downlink control information, and the downlink control information is sent according to the terminal device being a multi-card terminal device, and the terminal device includes at least two user identification cards.

30. A terminal device, characterized in that: The terminal device includes: a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement the method for transmitting downlink control information as described in any one of claims 1 to 11.

31. A network device, characterized in that: The network device includes: a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement the method for transmitting downlink control information as described in any one of claims 12 to 25.

32. A computer-readable storage medium, characterized in that: The readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to enable the communication device to implement the method for transmitting downlink control information as described in any one of claims 1 to 25.

33. A chip, characterized in that: The chip includes a programmable logic circuit or a program, and a communication device equipped with the chip is used to implement the method for transmitting downlink control information as described in any one of claims 1 to 25.

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