CN114041317A

CN114041317A - Communication system switching method and communication device

Info

Publication number: CN114041317A
Application number: CN201980098071.0A
Authority: CN
Inventors: 肖洁华; 李新县; 唐浩; 王轶
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2022-02-11
Also published as: WO2021042310A1

Abstract

The embodiment of the application discloses a communication system switching method and a communication device, relates to the field of communication, and can reduce the influence on the communication performance of a communication system when a terminal switches an SIM card to a certain extent. The method comprises the following steps: the method comprises the steps that a terminal receives first information from first network equipment, wherein the first information comprises a first parameter of the terminal for communicating with the first network equipment on a first cell, and the first parameter indicates that the terminal communicates on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal; and the terminal communicates with second network equipment on the second cell.

Description

Communication system switching method and communication device

Technical Field

The embodiment of the application relates to the field of communication, and in particular relates to a communication system switching method and a communication device.

Background

At present, when a terminal accesses a communication system, identity recognition can be completed by using a user identification card in the terminal. For example, the communication system may be accessed using a Subscriber Identity Module (SIM) or a Universal Subscriber Identity Module (USIM).

The terminal can support multiple SIM cards to access different communication systems using different SIM cards. For example, the terminal supports two SIM cards, and the terminal can access a Long Term Evolution (LTE) communication system by using the first SIM card and access a fifth generation (5) by using the second SIM card^thgeneration, 5G) communication system. Assuming that the terminal accesses the 5G communication system, when the terminal decides to respond to paging of the LTE communication system or when the terminal needs to perform some services in the LTE communication system, the terminal may autonomously release a Radio Resource Control (RRC) connection with the 5G communication system, thereby affecting the communication performance of the 5G communication system. For example, during disconnection of the terminal from the 5G communication system, the 5G communication system may continue to page the terminal, resulting in a waste of paging resources. Or, the terminal may still be considered in the 5G communication system during scheduling, which may cause inaccuracy of scheduling information and affect the communication performance of the 5G communication system.

Disclosure of Invention

The embodiment of the application provides a communication system switching method and a communication device, which can reduce the influence on the communication performance of a communication system when a terminal switches an SIM card to a certain extent.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a method for handover of a communication system is provided, including: the terminal receives first information from first network equipment, wherein the first information comprises a first parameter for the terminal to communicate with the first network equipment on a first cell, and the first parameter indicates the terminal to communicate on a second cell; the first cell corresponds to a first subscriber identity module card of the terminal, and the second cell corresponds to a second subscriber identity module card of the terminal; the terminal communicates with a second network device on a second cell.

In this embodiment, after the terminal uses one subscriber identity card to register in the first communication system, the first network device in the communication system may indicate, through the first information, that the terminal may switch to another communication system corresponding to the second subscriber identity card, that is, communicate with the second network device in the second communication system by using the second communication system to which the second subscriber identity card is registered. The first network device and the second network device may be the same network device or different network devices. Therefore, the network side and the terminal side unify the behaviors of the communication systems corresponding to the terminal switching user identification cards, the network side can acquire the behaviors of the communication systems corresponding to the terminal switching user identification cards, and when the terminal switching user identification cards are disconnected with the first communication system, the first communication system can pause the paging of the terminal or pause the state statistics of the terminal, so that the resource waste caused by the pause of the paging of the terminal or the pause of the state statistics of the terminal is avoided; in a word, the method provided by the embodiment of the application can reduce the influence on the communication performance of the communication system when the terminal switches the SIM card to a certain extent.

In one possible design, the first parameter includes: information of one or more first bandwidth parts BWP activated on the first cell.

In this embodiment, the network device may indicate the activated BWP through the first parameter, and on the activated BWP, the terminal may communicate with the second cell, and may control a behavior of the terminal to switch the communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging the terminal or suspend state statistics on the terminal, thereby avoiding resource waste caused thereby.

In one possible design, the first parameter indicates that BWP configured on the second cell is activated on one or more time units.

In this embodiment, the network device may indicate the PWP activation mode, i.e. on which time units there is active BWP on the second cell, by the first parameter. In addition, on the BWP activated by the second cell, the terminal may communicate with the second cell, may control the behavior of the terminal to switch the communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging the terminal or suspend state statistics for the terminal, thereby avoiding waste of resources.

In one possible design, the first parameter includes a first bit sequence of length M and/or a second bit sequence of length M; the first bit sequence corresponds to N time units, one bit in the first bit sequence is used for indicating that the BWP configured on the first cell is activated on one or more time units in the N time units, and M is less than or equal to N; the second bit sequence corresponds to N time units, and one bit in the second bit sequence is used to indicate that the BWP configured on the second cell is activated in one or more time units of the N time units.

In this embodiment, a bit sequence may indicate an active BWP on a first cell and/or an active BWP on a second cell, where the terminal may communicate with the first cell on the active BWP of the first cell, and the terminal may communicate with the second cell on the active BWP of the second cell, and the first parameter may control a behavior of the terminal to switch a communication system corresponding to the subscriber identity card.

In one possible design, the first parameter indicates a transceiving capability of the terminal on the first cell, and the transceiving capability of the terminal on the first cell is lower than a maximum transceiving capability supported by the terminal.

In this embodiment of the application, the transceiving capability of the terminal on the first cell may also be indicated by the first parameter, and when the transceiving capability indicated by the transceiving parameter is lower than the maximum transceiving capability supported by the terminal, the first subscriber identity card and the second subscriber identity card of the terminal are supported to share a receiving channel or a transmitting channel of the terminal, and the terminal is supported to perform communication on the first cell and the second cell simultaneously. The behavior of the terminal for switching the user identification card corresponding to the communication system can be controlled through the first parameter, when the terminal is disconnected with the first communication system, the network equipment can pause the paging terminal or pause the state statistics of the terminal, and therefore resource waste caused by the fact is avoided.

In one possible design, the method further includes: sending second information to the first network equipment; the second information is used for indicating the maximum transceiving capability supported by the terminal and the transceiving sharing capability of the terminal.

In the embodiment of the application, the maximum transceiving capacity of the terminal and the transceiving sharing capacity of the terminal can be further indicated through the first parameter, so that the terminal is indicated to share the transceiving channel or switch the transceiving channel according to the first parameter, and the behavior of the terminal for switching the user identification card corresponding to the communication system can be controlled.

In one possible design, the method further includes: the terminal sends third information to the first network equipment; the third information is used to request the first information.

In one possible design, the third information further includes a first duration, where the first duration is a duration for which the terminal requests to communicate in the second cell.

In one possible design, the method further comprises: and acquiring a second time length, wherein the second time length is the time length of the terminal allowed to communicate in the second cell.

The method is described above with only the terminal as the subject of the method, and it is understood that the method may also be performed by a component of the terminal (e.g., a processor, a chip, or a system of chips, etc.).

In a second aspect, a method for handover of a communication system is provided, including: the first network equipment generates first information, wherein the first information comprises a first parameter of the terminal for communicating with the first network equipment on a first cell, and the first parameter indicates the terminal for communicating on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal. The network device may also send the first information to the terminal.

In one possible design, the method further comprises: receiving second information from the terminal; the second information is used for indicating the maximum transceiving capability supported by the terminal and the transceiving sharing capability of the terminal.

In one possible design, the method further includes: receiving third information from the terminal; the third information is used to request the first information.

In one possible design, the method further includes: and sending information of a second time length to the terminal, wherein the second time length is the time length of the terminal allowed to communicate in the second cell.

While the method has been described above with only the first network device as the subject of execution of the method, it will be appreciated that the method may also be performed by a component of the first network device (e.g., a processor, a chip, or a system-on-a-chip, etc.).

In a third aspect, an embodiment of the present application provides a communication apparatus, which may implement the method in the first aspect or any one of the possible implementation manners of the first aspect. The apparatus comprises corresponding units or means for performing the above-described method. The means comprising may be implemented by software and/or hardware means. The device can be a terminal, or a chip, a chip system, a processor or the like which can support the terminal to implement the method.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, which may implement the method in the second aspect or any possible implementation manner of the second aspect. The apparatus comprises corresponding units or means for performing the above-described method. The means comprising may be implemented by software and/or hardware means. The apparatus may be, for example, a network device (e.g., a base station), or a chip, a chip system, or a processor that can support the network device to implement the method described above. The device can be a terminal, or a chip, a chip system, a processor or the like which can support the terminal to implement the method.

In a fifth aspect, the present application provides a communication device, comprising: a processor coupled to a memory, the memory being configured to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of the first aspect, or any of the possible implementations of the first aspect.

In a sixth aspect, the present application provides a communication apparatus comprising: a processor coupled to a memory, the memory being configured to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of the second aspect described above, or any one of the possible embodiments of the second aspect.

In a seventh aspect, the present application provides a storage medium having stored thereon a computer program or instructions which, when executed, cause a computer to perform the method of the first aspect, or any one of the possible implementations of the first aspect.

In an eighth aspect, the present application provides a storage medium having stored thereon a computer program or instructions which, when executed, cause a computer to perform the method of the second aspect described above, or any one of the possible embodiments of the second aspect.

In a ninth aspect, an embodiment of the present application provides a communication system, including: the apparatus of the third aspect above, and/or the apparatus of the fourth aspect above.

In a tenth aspect, an embodiment of the present application provides a communication system, including: the apparatus of the fifth aspect above, and/or the apparatus of the sixth aspect above.

Drawings

Fig. 1 is an architecture diagram of a communication system to which embodiments provided herein are applicable;

fig. 2a to fig. 2c are schematic diagrams of several possible terminal radio frequency channels provided in the embodiment of the present application;

fig. 3 is a schematic diagram of a possible Carrier Aggregation (CA) scenario provided in an embodiment of the present application;

fig. 4 is a schematic diagram of a possible Dual Connectivity (DC) scenario provided by an embodiment of the present application;

fig. 5a and 5b are block diagrams of structures of a communication device according to an embodiment of the present application;

fig. 6 is a flowchart illustrating a handover method of a communication system according to an embodiment of the present application;

fig. 7 is a flowchart illustrating another handover method for a communication system according to an embodiment of the present application;

fig. 8 to 10 are schematic diagrams of several possible cell handovers according to the embodiment of the present application;

fig. 11 is another block diagram of a communication device according to an embodiment of the present disclosure.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The techniques described in embodiments of the present application may be used in various communication systems, such as fourth generation (4)^thgeneration, 4G) communication system, 4.5G communication system, 5G communication system, system in which a plurality of communication systems are integrated,or a future evolving communication system. Such as Long Term Evolution (LTE) systems, New Radio (NR) systems, wireless fidelity (WiFi) systems, and 3rd generation partnership project (3 GPP) related communication systems, and the like, as well as other such communication systems.

First, terms related to embodiments of the present application are explained.

(1) User identification card

The information in the user identification card can be used as an identity of the terminal in a certain communication system, and the communication system can identify the terminal according to the information in the user identification card of the terminal. The user identification card can also store or generate a secret key to encrypt the call, so that the risk of eavesdropping on the call is reduced.

The user identification card is mainly used for identity authentication when the terminal accesses a communication network. The embodiment of the present application does not limit the specific form of the subscriber identity module, for example, the subscriber identity module may be an SIM card, a USIM card, a virtual SIM card, or an identity module card evolved in the following. For simplicity of description, the SIM card, USIM card, virtual SIM card, and the like are collectively referred to as a SIM card in the embodiments of the present application. The SIM card has the identification code and the secret key of the terminal user, and the communication system can authenticate the terminal user according to the information in the SIM card.

(2) Searching network and registering

The terminal can obtain the service provided by the network after the network is registered. After the terminal is registered in the network, the network can store the relevant information of the terminal, so that the network can page the terminal and can also access the network for communication.

In the process of starting up or roaming, the terminal firstly uses the user identification card to perform network searching registration, and the network searching registration process can include the following steps:

step 1. initialization

The initialization process is used to obtain the subscriber identity card information. For example, after the terminal inserts the subscriber identity card, the terminal performs data interaction with the subscriber identity card, and the terminal can obtain information contained in the subscriber identity card and subsequently register to the network by using the information.

It is understood that each operator can control the network service of the terminal through the information in the subscriber identity card.

Step 2. Public Land Mobile Network (PLMN) selection

The PLMN selection is a step when the terminal performs network searching registration in an RRC idle state. For example, the terminal determines the priority of each PLMN according to the PLMN information stored in the subscriber identity card, and may select the PLMN with the highest priority from the priorities. The terminal selects the PLMN, which determines the network service operator.

The terminal may obtain the PLMN ID after selecting the PLMN. It is to be understood that the priority of the PLMN may be determined according to the subscriber identity card preset service, service signal quality, etc.

Step 3. frequency scanning

And frequency scanning, namely, the terminal scans frequency and determines a frequency point for communication.

Step 4, cell selection and residence

After selecting PLMN, the terminal carries out frequency sweep and determines a certain frequency point, and then initiates a cell search process. And then judging the searched cell, if the PLMN to which the selected cell belongs is the same as the PLMN selected in the step 2, the UE resides in the cell according to the residence criterion and receives the system information of the cell. If the selected cell belongs to a different PLMN from the selected PLMN of step 2, the terminal may re-perform cell search until successful camping on a specific cell (e.g., a cell belonging to the same PLMN as the selected PLMN of step 2).

Step 5 PLMN registration

After the terminal resides in the cell, it can initiate a registration process to register to the selected PLMN to obtain the required service. The terminal may establish a Radio Resource Control (RRC) connection with the camped cell and enter an RRC connected state for subsequent data transmission.

Therefore, the terminal completes the process of searching and registering the network and can communicate with the network.

Alternatively, the terminal may support a plurality of subscriber identity cards, for example, may support two subscriber identity cards. For a terminal supporting a plurality of subscriber identity modules, the terminal can be first registered in a communication system corresponding to one SIM card after being powered on. For example, the terminal supports the subscriber identity card 1 and the subscriber identity card 2, and after the terminal is powered on, registration may be completed in a core network of the communication system corresponding to the subscriber identity card 1 according to information in the subscriber identity card 1, and the core network may record relevant information of the terminal, for example, location information, capability information, and the like of the terminal. The core network may also assign an IP address to the terminal. According to the capability of the terminal, such as a dual-card dual-standby terminal, the terminal can also register to a communication system corresponding to the second subscriber identity card.

In addition, a plurality of subscriber identity cards supported by the terminal can distinguish a primary subscriber identity card from a secondary subscriber identity card. For example, the primary user identification card may be the user identification card 1, and the secondary user identification card may be the user identification card 2. Or, the primary user identification card is the user identification card 2, and the secondary user identification card is the user identification card 1.

(3) Cell corresponding to user identification card

In the embodiment of the present application, the residential cell or the service transmission cell determined by performing PLMN selection and/or cell selection according to the information in the subscriber identity card may be referred to as a cell corresponding to the subscriber identity card. The method specifically comprises the following possibilities:

first, a cell establishing RRC connection with a terminal in a network searching and registering process may be referred to as a cell corresponding to a subscriber identity card.

For example, the terminal may register with a corresponding network using network information in the subscriber identity card. An RRC connection may be established on a certain cell during registration. The cell in which the RRC connection is established with the terminal may be referred to as a cell corresponding to the subscriber identity card.

Second, a cell or a cell where the terminal performs data transmission may be referred to as a cell corresponding to the subscriber identity card.

In addition, after the terminal completes registration, the terminal may change a cell performing a service (e.g., a cell performing data transmission with the terminal) or a camping cell according to a service requirement or a state of location movement. These cells can be the cells corresponding to the subscriber identity card. The cell of the terminal is in an RRC connected state when the terminal performs a service, and the cell of the terminal is in an RRC idle state when the terminal resides in the cell.

For example, assume that SIM card 1 of the terminal is a shanghai mobile 4G card and SIM card 2 is a shanghai unicom 3G card. The SIM card 1 is provided with a plurality of PLMN information corresponding to the Shanghai mobile 4G network. The terminal can select the PLMN and the cell according to the information in the SIM card 1. Assuming that the user of the terminal is in the golden bridge area of shanghai, the result of the PLMN selection is a mobile 4G PLMN, and the result of the cell selection is a cell 1 on a certain base station 1 in the golden bridge area.

The terminal may initiate registration on the cell 1 according to the user identity information in the SIM card 1, and the registration process needs to establish an RRC connection on the cell 1, at this time, the cell 1 may be referred to as a cell corresponding to the SIM card 1.

After the registration is completed, if the terminal has no service requirement, the RRC connection with the cell 1 may be disconnected, and the terminal enters an RRC idle state, but still may reside in the cell 1 and monitor the system information sent by the cell 1, where the cell 1 may also be referred to as a cell corresponding to the SIM card 1.

If after the registration is completed, the terminal has no service requirement but is located at a changed geographical position, for example, the user moves to the civic area, and the result of the cell selection/reselection is the cell 2 on the civic base station 2. The terminal may camp on the cell 2 to monitor the system information of the cell (at this time, the terminal is in an RRC idle state), and then the cell 2 may also be referred to as a cell corresponding to the SIM card 1.

If the terminal has a service requirement, an RRC connection is established in the cell 2, and the cell 2 enters an RRC connected state, where the cell 2 may be referred to as a cell corresponding to the SIM card 1.

(4) Radio Resource Control (RRC) state

In the LTE communication system, the RRC state of the terminal may be an RRC idle state (idle state) or an RRC connected state (connected state). In the 5G communication system, the RRC state of the terminal may be an RRC idle state, an RRC connected state, or an RRC inactive state.

In the 5G communication system, when the terminal establishes an RRC connection with the network device, the terminal may be in an RRC connected state or an RRC inactive state. When the terminal and the network device do not establish the RRC connection, the terminal is in an RRC idle state.

When the terminal is in an inactive state, the terminal may move within a radio access network (RNA) area, and the core network may maintain cm (connection management) -connected of the terminal. It can be understood that the core network considers that the terminal is in the connected state, and the RRC configuration information of the terminal is retained.

It is understood that when the terminal enters RRC inactive state from RRC connected state, the base station may indicate an RNA region in which the terminal's activity does not need to know the network, but beyond which an RNA update (update) is needed.

(5) Bandwidth part (BWP)

BWP is a set of contiguous RB resources on a carrier that a terminal may be configured with BWP for uplink or downlink transmission. A serving cell in a New Radio (NR) Rel-15 can configure a maximum of 4 BWPs for a terminal.

The BWP used for the terminal to receive data is called a downlink BWP, and the BWP used for the terminal to transmit data is called an uplink BWP. For a terminal, optionally, only one BWP can be activated at the same time, and the terminal performs data transceiving on the activated BWP.

Fig. 1 is a schematic diagram of a communication system to which the technical solution provided in the present application is applicable, where the communication system may include a network device and a terminal. Different subscriber identity cards on the terminal 200 may support the terminal to register in different communication systems, and after the terminal registers in different communication systems, the terminal may communicate with different network devices, for example, to receive and transmit data in a serving cell of the network device. Referring to fig. 1, it is assumed that a terminal 200 supports two SIM cards, SIM card 1 and SIM card 2. SIM cards 1 and 2 may be SIM cards provided by the same operator or SIM cards provided by different operators, for example, SIM card 1 is a SIM card supporting LTE FDD provided by operator a, and SIM card 2 is a SIM card supporting 5G provided by operator B.

The terminal may register to the first communication system using the information in the SIM card 1, the network device 101 may be a network device in the first communication system, and the terminal may access a cell of the network device 101 after registering to the first communication system. The terminal may also use the information in the SIM card 2 to register with the second communication system, the network device 102 may be a network device in the second communication system, and the terminal may access the cell of the network device 102 after registering with the second communication system.

It should be noted that fig. 1 is only a schematic diagram, and does not limit an application scenario of the technical solution provided in the present application. The different SIM cards in the terminal 200 may also support the terminal registering in the same communication system, e.g. the terminal registering to the first communication system using the information in SIM cards 1, 2.

In this application, the network device may be any device having a wireless transceiving function. Including but not limited to: an evolved Node B (NodeB or eNB or e-NodeB) in LTE, a base station (gnnodeb or gNB) or a transmission point (TRP) in NR, a subsequently evolved base station, an access Node in WiFi system, a wireless relay Node, a wireless backhaul Node, and the like. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, or balloon stations, etc. Multiple base stations may support the same technology network as mentioned above, or different technologies networks as mentioned above. The base station may contain one or more co-sited or non co-sited TRPs. The network device may also be a radio controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, a machine communication device, or an in-vehicle device, etc. The following description will take a network device as an example of a base station. The multiple network devices may be base stations of the same type or different types. The base station may communicate with the terminal device, and may also communicate with the terminal device through the relay station. The terminal device may communicate with a plurality of base stations of different technologies, for example, the terminal device may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, and may support dual connectivity with the base station of the LTE network and the base station of the 5G network.

The terminal is a device with a wireless transceiving function, can be deployed on land, and comprises an indoor or outdoor terminal, a handheld terminal, a wearable terminal or a vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a terminal in industrial control (industrial control), a vehicle-mounted terminal device, a terminal in self driving (self driving), a terminal in auxiliary driving, a terminal in remote medical (remote medical), a terminal in smart grid (smart grid), a terminal in transportation safety (transportation safety), a terminal in smart city (smart city), a terminal in smart home (smart home), a wearable terminal device, a terminal in machine communication, and the like. The embodiments of the present application do not limit the application scenarios. A terminal may also be referred to as a terminal device, User Equipment (UE), access terminal device, in-vehicle terminal, industrial control terminal, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, machine terminal, UE agent, or UE apparatus, to name a few. The terminals may be fixed or mobile.

In addition, in the embodiment of the present application, the terminal may also be a terminal device in an internet of things (IoT) system, the IoT is an important component of future information technology development, and the main technical feature of the present application is to connect an article with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects. The terminal device in the embodiment of the present application may also be a terminal device in Machine Type Communication (MTC). The terminal device of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit built into the vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in on-board module, on-board component, on-board chip, or on-board unit. Therefore, the embodiment of the application can be applied to vehicle networking, such as vehicle to outside (V2X), long term evolution (LTE-V) for vehicle to vehicle communication, V2V, and the like.

Fig. 2a to 2c show structural illustrations of a terminal supporting two subscriber identity cards. Wherein, a subscriber identity module card can correspond to one or more sets of radio frequency circuits. The radio frequency circuit is connected with the antenna. The terminal can receive signals through an antenna connected with a radio frequency circuit, and a receiving part in the radio frequency circuit and the corresponding antenna form a receiving channel. The terminal can also transmit signals through an antenna connected with the radio frequency circuit, and a transmitting part in the radio frequency circuit and the corresponding antenna form a transmitting channel.

Referring to fig. 2a, a SIM card 1 and a SIM card 2 in a terminal share a receiving channel, and the SIM card 1 and the SIM card 2 share the same transmitting channel, which may also be referred to as a single Rx/single Tx (single Rx/single Tx) structure; referring to fig. 2b, the SIM card 1 and the SIM card 2 may correspond to separate receiving channels, but the SIM card 1 and the SIM card 2 share one transmitting channel, and this structure may also be referred to as a dual Rx/single Tx (dual Rx/single Tx) structure; referring to fig. 2c, one of the two transmission channels is used by the SIM card independently, and the other is shared by the SIM cards. In fig. 2c, Tx1 and Tx2 are independent transmission channels for each SIM, and Tx1 may also be shared for SIM card 2. When the SIM card 1 does not use Tx1, the SIM card 2 can use both Tx1 and Tx2 transmission channels at the same time; when SIM card 1 uses Tx1, SIM card 2 cannot transmit using Tx 1. This structure of FIG. 2c may also be referred to as a dual Rx/dual Tx (dual Rx/dual Tx) structure.

The communication system shown in fig. 1 may support the CA scenario shown in fig. 3, where CA is a combination of two or more Component Carriers (CCs) to support a larger transmission bandwidth, and one CC corresponds to one cell. As shown in fig. 3, the network device 100 and the terminal 200 communicate through a primary cell and/or a secondary cell. The primary cell includes a primary carrier, which may be a primary downlink carrier and/or a primary uplink carrier. The secondary cell includes a secondary carrier, which may be a secondary downlink carrier and/or a secondary uplink carrier. The terminal 200 may be located in the coverage of the primary cell and transmit data to the network device 100, and the network device 100 may also transmit data to the terminal 200 through a downlink carrier of the primary cell. The terminal 200 may also be located within the coverage area of the secondary cell, and send data to the network device through the uplink carrier of the secondary cell, and the network device 100 may also send data to the terminal 200 through the downlink carrier of the secondary cell.

It should be noted that, in the embodiment of the present application, there is no limitation on the sizes of the coverage areas of the primary cell and the secondary cell, and for convenience of description, one cell is referred to as a primary cell, and another cell is referred to as a secondary cell, where the primary cell and the secondary cell may be interchanged, and the names of the primary cell and the secondary cell do not play a limiting role.

The communication system shown in fig. 1 may also support the DC scenario shown in fig. 4, i.e. at least two carriers for aggregation are carriers provided by different network devices.

Referring to fig. 4, in a DC scenario, the network device 101 may provide a carrier (carrier 1 shown in fig. 4) for the terminal 200 to communicate with the network device 101. Network device 102 may provide terminal 200 with a carrier (carrier 2 shown in fig. 4) for communication between terminal 200 and network device 102. Network device 101 may be a primary node, network device 102 may be a secondary node, carrier 1 may be referred to as a primary cell group carrier (or may be referred to as a primary node carrier), and carrier 2 may be referred to as a secondary cell group carrier (or may be referred to as a secondary node carrier);

alternatively, network device 102 may be a primary node, network device 101 may be a secondary node, carrier 2 may be referred to as a primary cell group carrier (or may be referred to as a primary node carrier), and carrier 1 may be referred to as a secondary cell group carrier (or may be referred to as a secondary node carrier).

In the embodiment of the application, the terminal is registered in different communication systems according to different SIM cards. Wherein the terminal supports CA or DC between carriers communicating in one communication system. For example, the terminal is registered in a first communication system by using a first SIM card, the first communication system configures two carriers, namely, a 3.5GHz carrier and a 2.1GHz carrier, for the terminal (CA or DC can be supported between the two carriers), and the terminal can transmit and receive data in the first communication system through the two carriers, namely, the 3.5GHz carrier and the 2.1G carrier. The terminal is registered in a second communication system by using a second SIM card, the second communication system configures a 900MHz carrier for the terminal, and the terminal can receive and transmit data in the second communication system through the 900MHz carrier.

When the SIM card corresponding to the terminal supporting multiple SIM cards performs communication is switched, the performance of the communication system may be affected. For example, the terminal is registered in the first communication system according to the information in the first SIM card, and when communication is performed in the first communication system, the terminal may disconnect from the network device of the first communication system due to the requirement of the terminal itself, and suddenly disconnect from the first communication system. During the period of disconnection between the terminal and the first communication system, the first communication system may continue paging the terminal, causing a waste of paging resources of the system, which further affects the communication performance of the first communication system, resulting in a decrease in transmission efficiency of the system. Or the terminal is disconnected from the first communication system autonomously, which causes the first communication system to have a wrong understanding of the terminal state, thereby counting data in the system incorrectly, resulting in waste of communication resources or errors in the communication process.

For simplicity of description, the embodiments of the present application are described by taking an example in which each communication system includes one cell. The present application still applies when a communication system comprises a plurality of cells. The number of cells included in a communication system is not limited in the present application.

The embodiment of the application provides a communication system switching method, wherein a terminal receives first information from first network equipment, the first information comprises a first parameter of the terminal for communicating with the first network equipment on a first cell, and the first parameter indicates the terminal to communicate on a second cell. The first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal. The terminal may communicate with the second network device on the second cell after receiving the first information. In the embodiment of the application, after the terminal uses one subscriber identity card to register in the first communication system, the first network device in the communication system can indicate that the terminal can be switched to another communication system corresponding to the second subscriber identity card through the first information, that is, the second communication system to which the second subscriber identity card is registered is used for communicating with the second network device in the second communication system. The first network device and the second network device may be the same network device or different network devices. Therefore, the network side and the terminal side unify the behaviors of the communication systems corresponding to the terminal switching user identification cards, the network side can acquire the behaviors of the communication systems corresponding to the terminal switching user identification cards, and when the terminal switching user identification cards are disconnected with the first communication system, the first communication system can suspend paging of the terminal or state statistics of the terminal, so that resource waste caused by the paging of the terminal can be avoided. Therefore, the method provided by the embodiment of the application can reduce the influence on the communication performance of the communication system when the terminal switches the SIM card to a certain extent.

In the embodiment of the present application, switching the subscriber identity card may also be understood as switching a communication system corresponding to the subscriber identity card by the terminal, or transferring a part of the terminal capability from one communication system to another communication system. For example, the terminal first registers to the first network according to the information in the first subscriber identity card, and establishes an RRC connection with the first cell. The terminal may also register with the second network according to information in the second subscriber identity card, and the terminal switching subscriber identity card may be switched from the first network to the second network to communicate in a cell (e.g., a second cell) of the second network. Or some or all of the radio frequency or baseband capability may be transferred from the first network to the second network. The switching of radio frequency or baseband resources may also be understood as coordination of capabilities between different communication systems.

The terminal according to the embodiment of the present application can be implemented by the communication device 510 in fig. 5 a. Figure 5a shows a schematic of the structure of an apparatus. The apparatus 510 may be a network device, a terminal device, a chip system, or a processor that supports the network device to implement the method, or a chip, a chip system, or a processor that supports the terminal device to implement the method. The apparatus may be configured to implement the method described in the method embodiment, and refer to the description in the method embodiment.

The device 510 may include one or more processors 5101, and the processors 5101 may also be referred to as processing units, which may implement certain control functions. The processor 5101 may be a general purpose processor, a dedicated processor, or the like. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal chip, a DU or CU, etc.), execute a software program, and process data of the software program.

In an alternative design, the processor 5101 may also have instructions and/or data 5103 stored thereon, and the instructions and/or data 5103 may be executed by the processor to cause the device 510 to perform the methods described in the method embodiments above.

In an alternative design, the processor 5101 may include a transceiver unit therein for performing receive and transmit functions. The transceiving unit may be, for example, a transceiving circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In yet another possible design, the apparatus 510 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the device 510 may include one or more memories 5102, on which instructions 5104 may be stored, which may be executed on the processor, causing the device 510 to perform the methods described in the method embodiments above. Optionally, the memory may further store data therein. Optionally, instructions and/or data may also be stored in the processor. The processor and the memory may be provided separately or may be integrated together. For example, the correspondence described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the device 510 may also include a transceiver 5105 and/or an antenna 5106. The processor 5101, which may be referred to as a processing unit, controls the device 510. The transceiver 5105 may be referred to as a transceiver unit, a transceiver, a transceiving circuit or a transceiver, etc., for implementing transceiving functions.

The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, Radio Frequency Integrated Circuits (RFICs), mixed signal ICs, Application Specific Integrated Circuits (ASICs), Printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), Bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

The apparatuses in the description of the above embodiments may be network devices or terminal devices, but the scope of the apparatuses described in this application is not limited thereto, and the structure of the apparatuses may not be limited by fig. 5 a. The apparatus may be a stand-alone device or may be part of a larger device. For example, the apparatus may be:

(1) a stand-alone IC, or chip, or system-on-chip or subsystem;

(2) a set of one or more ICs, which optionally may also include storage components for storing data and/or instructions;

(3) an ASIC, which can be, for example, a modem;

(4) a module that may be embedded within other devices;

(5) receivers, terminals, smart terminals, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like.

Fig. 5b provides a schematic structural diagram of a terminal device. For ease of illustration, fig. 5b shows only the main components of the terminal device. As shown in fig. 5b, the terminal device 520 includes a processor, a memory, a control circuit, an antenna, and an input-output means. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal, executing software programs and processing data of the software programs. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is started, the processor can read the software program in the storage unit, analyze and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit processes the baseband signals to obtain radio frequency signals and sends the radio frequency signals outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal device, the radio frequency circuit receives a radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, the baseband signal is output to the processor, and the processor converts the baseband signal into the data and processes the data.

For ease of illustration, FIG. 5b shows only one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 5b integrates the functions of a baseband processor and a central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In one example, the antenna and the control circuit having the transmitting and receiving functions may be regarded as the transmitting and receiving unit 5201 of the terminal device 520, and the processor having the processing function may be regarded as the processing unit 5202 of the terminal device 520. As shown in fig. 5b, the terminal device 520 includes a transceiving unit 5201 and a processing unit 5202. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiver 5201 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver 5201 may be regarded as a transmitting unit, that is, the transceiver 5201 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc. Optionally, the receiving unit and the sending unit may be integrated into one unit, or may be multiple units independent of each other. The receiving unit and the transmitting unit can be in one geographical position or can be dispersed in a plurality of geographical positions.

An embodiment of the present application provides a method for switching a communication system, as shown in fig. 6, the method includes the following steps:

601. the method comprises the steps that first network equipment sends first information to a terminal, and the terminal receives the first information; the first information comprises a first parameter of the terminal for communicating with the first network equipment on the first cell, and the first parameter indicates that the terminal communicates on the second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal.

In the embodiment of the application, the subscriber identity module card may be, for example, an SIM card, and stores information for performing identity authentication by the terminal. The terminal can register to the first communication system by using the information in the first subscriber identity card, and can communicate in the first communication system. For example, the communication with the first network device on the first cell of the first network device may be to transmit data to the first network device or to receive data transmitted by the first network device. The first cell may be considered to be a cell corresponding to the first subscriber identity card, i.e. the first cell corresponds to the first subscriber identity card of the terminal.

The first network device can also instruct the terminal to switch the user identification card through the first information, and the terminal can switch to a second communication system registered according to the second user identification card after receiving the first information and communicate with the second network device in the second communication system. For example, the communication with the second network device on the second cell of the second network device may be to transmit data to the second network device or to receive data transmitted by the second network device. The second cell may be considered to be a cell corresponding to the second subscriber identity card, i.e. the second cell corresponds to the second subscriber identity card of the terminal. In the embodiment of the present application, "performing communication" includes receiving system information, receiving a paging message, initiating random access, transmitting data, receiving data, and the like.

602. And the terminal communicates with the second network equipment on the second cell.

In a specific implementation, the BWP of the first cell that does not perform data transceiving is activated according to the first parameter, and when the BWP of the first cell that does not perform data transceiving is activated, the terminal may communicate with the second network device through the second cell. Alternatively, the first parameter may indicate which time units the first cell is activated in, that is, may determine which time units the first cell is not activated in, and the terminal may communicate with the second network device through the second cell on the time units the first cell is not activated in. Alternatively, the first parameter may indicate which time units the BWP of the first cell is activated on, i.e. may determine which time units the BWP of the first cell is not activated on, and the terminal may communicate with the second network device through the second cell on those time units the BWP of the first cell is not activated. Or, the first parameter indicates the transceiving capacity of the terminal for communication on the first cell, and when the transceiving capacity of the terminal for communication on the first cell is lower than the maximum transceiving capacity of the terminal, the terminal can communicate with the first network device through the first cell and can also communicate with the second network device through the second cell.

The first parameter in the first information may be specifically configured in one or more of the following three ways:

first, the first network device may configure the terminal with a BWP on the first cell, where the terminal does not perform data reception or transmission. The BWP may be an uplink BWP where the terminal does not transmit data or a downlink BWP where the terminal does not receive data. For example, the BWP may be referred to as a special BWP (special BWP), an idle BWP, a pause BWP, a sleep BWP, or the like, and the name of the BWP is not limited in the embodiments of the present application. The special BWP may be a special downlink BWP or a special uplink BWP, the idle BWP may be an idle downlink BWP or an idle uplink BWP, the pause BWP may be a pause downlink BWP or a pause uplink BWP, and the sleep BWP may be a sleep downlink BWP or a sleep uplink BWP. The terminal does not receive data on the special downlink BWP; the terminal does not transmit data on the special upstream BWP. The first network device may activate a special BWP configured for the first cell with the first parameter. When the special BWP configured for the first cell is activated, the terminal does not perform reception or transmission of data on the first cell.

Taking the activation of the special downlink BWP as an example, when the special downlink BWP is activated, the terminal may switch the receiving channel to the communication system in which the second subscriber identity card is registered, communicate with the second network device of the second communication system, and receive data in a cell of the second network device (i.e., the second cell according to the embodiment of the present application). In addition, the terminal does not perform data reception on the first cell, e.g., the terminal does not perform one or more of the following on the first cell: monitoring a Physical Downlink Control Channel (PDCCH), receiving a Physical Downlink Shared Channel (PDSCH), measuring Channel State Information (CSI), and receiving system information.

Taking the activation of the special uplink BWP as an example, when the special uplink BWP is activated, the terminal may switch the receiving channel to the communication system registered by the second subscriber identity card, communicate with the second network device of the second communication system, and perform data transmission on the cell of the second network device (i.e., the second cell according to this embodiment of the present application). In addition, the terminal does not transmit data on the first cell, e.g., the terminal does not perform one or more of the following on the first cell: a Physical Uplink Control Channel (PUCCH) and a physical downlink shared channel (PUSCH) are transmitted.

In a specific implementation, the first parameter may include: information of one or more first BWPs activated on the first cell. The first BWP may be the above-mentioned special BWP (which may be a special downstream BWP or a special upstream BWP). After receiving the first information from the first network device, the terminal may determine, according to the first information, that the first cell has the activated first BWP, may also determine that the terminal may switch to the communication system of the second subscriber identity card, communicate with the second network device of the second communication system, receive data sent by the second network device on the second cell of the second network device, or send data to the second network device on the second cell of the second network device.

Second, the first network device may indicate on which time units the second cell is activated or may also indicate on which time units the BWP of the second cell is activated. The terminal may communicate with the second network device on the second cell or the BWP of the second cell when the second cell or the BWP of the second cell is activated for a certain time unit.

Illustratively, the first parameter indicates a cell activation mode or a BWP activation mode; the cell activation mode is to indicate that the second cell is activated on one or more time units; the BWP activation mode is used to indicate that BWP configured on the second cell is activated on one or more time units.

It can be understood that when the BWP configured in the second cell is activated, the terminal may perform normal data transceiving on the BWP, that is, when such BWP configured in the second cell is activated, the terminal may perform normal communication on the BWP, for example, monitor PDCCH, receive PDSCH, measure CSI, receive system information, transmit Physical Uplink Shared Channel (PUSCH), and the like. However, such a BWP configured in the second cell may be referred to as a normal BWP, or the like, and unlike the above-mentioned special BWP, the name of the BWP is not limited in the embodiments of the present application.

Similarly, when the second cell is activated, the terminal may perform normal data transceiving on the activated second cell, for example, monitor a PDCCH, receive a PDSCH, measure CSI, receive system information, send a Physical Uplink Shared Channel (PUSCH), and the like.

Optionally, the cell activation mode or the BWP activation mode may be indicated by a bit sequence. Optionally, the first parameter may include a first bit sequence of length M, the first bit sequence indicating an activation mode of the first cell or a BWP activation mode of the first cell. When the terminal operates on two cells, the terminal may invert the first bit sequence to obtain a bit sequence corresponding to the second cell, and determine, according to the obtained bit sequence, a BWP activation mode of the second cell, that is, which time units the BWP of the second cell is activated on. Or, the first bit sequence indicates an activation mode of the first cell, and when the terminal operates in two cells, the terminal may invert the first bit sequence to obtain a bit sequence corresponding to the second cell, and determine the activation mode of the second cell according to the obtained bit sequence, that is, which time units the second cell is activated in.

For example, the first bit sequence corresponds to N time units, any one bit in the first bit sequence is used to indicate that BWP configured on the first cell is activated in one or more time units of the N time units, and M is less than or equal to N. Suppose that the first bit sequence is 01101, wherein one bit corresponds to one slot (slot), and the first bit sequence corresponds to slots 1-5 one by one. And negating the first bit sequence to obtain a second bit sequence '10010', which is in one-to-one correspondence with the time slots 1-5. A bit of "0" indicates that the second cell or the BWP configured for the second cell is not activated in the corresponding timeslot; a bit of "1" indicates that the second cell or the BWP configured for the second cell is activated on the corresponding time slot. The second bit sequence "10010" indicates: the second cell or the BWP configured for the second cell is activated in time slot 1, and the terminal may communicate with the second network device through the second cell or the BWP configured for the second cell in time slot 1 to perform data transceiving on the second cell. At time slot 4, the BWP configured for the second cell is activated, and the terminal may communicate with the second network device through the second cell or the BWP configured for the second cell at time slot 4 to perform data transceiving on the second cell.

It is to be understood that the first parameter may also be a boolean type sequence, for example, the first sequence is false, true, true. Wherein False represents inactive and true represents active.

Optionally, the first parameter may include a second bit sequence with a length of M, where the second bit sequence corresponds to the N time units, and any one bit in the second bit sequence is used to indicate that the BWP configured in the second cell is activated in one or more time units of the N time units. Illustratively, the second bit sequence is "10001", where each bit corresponds to 2 slots and the second bit sequence corresponds to slots 1-10. Assuming that a bit of "0" represents that the second cell is not activated or the BWP configured for the second cell is not activated at the corresponding time slot; a bit of "1" represents that the second cell is activated or the BWP configured for the second cell is activated at the corresponding time slot. The second bit sequence "10001" represents: and the second cell is activated or the BWP configured for the second cell is activated in time slot 1 and time slot 2, and the terminal may communicate with the second network device through the BWP configured for the second cell in time slot 1 and time slot 2 to perform data transceiving on the second cell. And the second cell is activated or the BWP configured for the second cell is activated in time slot 9 and time slot 10, and the terminal may communicate with the second network device through the BWP configured for the second cell in time slot 9 and time slot 10 to perform data transceiving on the second cell.

Optionally, the first parameter includes a first bit sequence with length M and a second bit sequence with length M.

It should be noted that the time unit described in the embodiment of the present application may be one or more time domain symbols, one or more time slots, one or more subframes, or one or more radio frames.

In one possible implementation, the lengths of the first bit sequence and the second bit sequence are different. Optionally, the length of the first bit sequence is M1, and bits of the first bit sequence correspond to time units one by one, for example, the first bit sequence corresponds to N1 time units, where M1 is N1. The second bit sequence has a length of M2, and one bit of the second bit sequence corresponds to a plurality of time units, for example, the second bit sequence corresponds to N2 time units, where M2< N2.

Illustratively, the first bit sequence comprises 4 bits, one for one corresponding to 4 time units. The second bit sequence comprises two bits, one of which corresponds to two time units.

Furthermore, the time unit corresponding to the first bit sequence and the time unit corresponding to the second bit sequence may have different lengths, for example, the absolute time lengths of the time units are different, and for example, one time unit corresponding to the first bit sequence is 0.5ms, and one time unit corresponding to the second bit sequence is 1 ms.

Or, the number of time units corresponding to the first bit sequence is the same as the number of time units corresponding to the second bit sequence, but the absolute time of the time units corresponding to the first bit sequence is different from the absolute time of the time units corresponding to the second bit sequence due to the difference of numerology parameters. For example, a time unit corresponding to the first bit sequence is a time slot, and a time unit corresponding to the second bit sequence is also a time slot, but since the numerology parameter of the first cell is different from the numerology parameter of the second cell, the length of the time slot corresponding to the first bit sequence is different from the length of the time slot corresponding to the second bit sequence. For example, the numerology parameter of the first cell is 0, a corresponding sub-carrier spacing (SCS) is 15KHz, and when the numerology parameter is 0, one slot corresponds to 1 ms. The numerology parameter of the second cell is 1, corresponding to SCS of 30KHz, and when the numerology parameter is 1, one slot corresponds to 0.5 ms. Furthermore, the numerology parameter may be expressed in μ.

The third mode, the first parameter, may further indicate the transceiving capability of the terminal on the first cell. For example, the first parameter may include a transceiving parameter of the terminal on the first cell. When the receiving capability of the terminal on the first cell is lower than the maximum receiving capability supported by the terminal, the first subscriber identity card and the second subscriber identity card supporting the terminal can share the receiving channel of the terminal, so that the terminal is supported to simultaneously receive data on the first cell and the second cell. When the sending capability of the terminal on the first cell is lower than the maximum sending capability supported by the terminal, the first subscriber identity card and the second subscriber identity card supporting the terminal can share the sending channel of the terminal, so that the terminal is supported to send data on the first cell and the second cell simultaneously.

By way of example, the first parameters include: the terminal receives and transmits the communication parameters on the first cell; the transceiving parameter indicates transceiving capacity of the terminal on the first cell, and the transceiving capacity of the terminal on the first cell is lower than the maximum transceiving capacity supported by the terminal.

Optionally, the transceiving parameter may be a transmission parameter for the terminal to perform uplink transmission on the first cell, where the transmission parameter indicates a transmission capability of the terminal on the first cell. The transmission capability of the terminal on the first cell may be the number of transmission antennas used by the terminal for uplink transmission on the first cell, for example, 3Tx represents the number of transmission antennas as 3, where Tx represents the transmission antennas.

For example, the transceiving parameter may be a parameter related to the number of uplink transmit antennas in the BWP configuration parameter of the first cell, for example, the transceiving parameter is one or more of parameter 1, parameter 2, parameter 3, and parameter 4 in the PUSCH-Config IE. Where parameter 1 indicates whether a codebook-based transmission scheme is used or a transmission scheme not based on a codebook is used, parameter 1 may be a txConfig parameter. Parameter 2 indicates that one transmission mode is selected from full and partial non-coherent transmission, or non-coherent transmission, and parameter 2 may be a codebook subset parameter. Parameter 3 represents the maximum order of transmission and parameter 3 may be a maxRank parameter. Parameter 4 represents the maximum number of Layers for MIMO transmission, and parameter 4 may be the maxMIMO-Layers parameter in the PUSCH-ServingCellConfig IE. Wherein, the maxMIMO-Layers parameter is related to the maximum number of antennas that can be used by the terminal.

Illustratively, the terminal supports data transmission using 4 antennas at most, wherein the terminal can support data transmission using 4 antennas at most (i.e. maximum terminal capability) in the first cell of the first communication system, wherein the transmission capability of 2 antennas is derived from the capability sharing with the second communication system, and the terminal supports data transmission using 2 antennas at most in the second cell of the second communication system. When the terminal only needs to send data to the first network device, 4 antennas can be used for sending data, and the maxMIMO-Layers parameter can be set to be 4; when the terminal needs to send data to both the first network device and the second network device, the first cell may use 2 antennas to send data, and then the maxMIMO-Layers parameter in the first cell may be set to 2, and the second cell may also use 2 antennas to send data, and then the maxMIMO-Layers parameter in the second cell may be set to 2.

The transceiving parameter may also be a parameter related to the number of downlink receiving antennas in the BWP configuration parameter, and indicates the receiving capability of the terminal in the first cell. The receiving capability of the terminal on the first cell may be the number of receiving antennas used by the terminal for downlink reception on the first cell, for example, the number of receiving antennas may be 3 represented by 3Rx, where Rx represents a receiving antenna.

Illustratively, the transceiving parameter is parameter 5 in the PDSCH-Config IE, where parameter 5 indicates the maximum number of codewords that can be scheduled by Downlink Control Information (DCI). Parameter 5 may be the maxnrof codewordsschedule bydci parameter. When the number of transmission layers of the MIMO is greater than a certain threshold, the transmission of multiple codewords can be supported. Illustratively, when the terminal supports MIMO of 4 layers at maximum, one DCI may be allowed to schedule 2 codewords, i.e., parameter 5 may represent "schedule 2 codewords".

It should be noted that the BWP configuration parameter of the first cell is used to configure BWP for the first cell, and may be configured by the first network device through an RRC message, a MAC CE, or Downlink Control Information (DCI). Further, the BWP referred to in the embodiments of the present application may be a downstream BWP or an upstream BWP.

In this embodiment, corresponding to the above three ways of configuring the first parameter, the terminal may also determine that communication with the second network device can be performed on the second cell in the following three ways:

in a first manner, the terminal receives first information from a first network device, where a first parameter in the first information indicates that a first BWP configured for a first cell is activated. The first BWP may be referred to as a special BWP, and may include a special downstream BWP or a special upstream BWP. The terminal does not receive data on a special downlink BWP; the terminal does not transmit data on a special upstream BWP.

Therefore, the terminal may determine that data transmission, including uplink data transmission and/or downlink data reception, is not performed temporarily on the first cell. During activation of the first BWP configured for the first cell, the terminal may switch to the second subscriber identity card to communicate with the second network device on the second cell corresponding to the second subscriber identity card.

In a second manner, the terminal receives first information from the first network device, where the first parameter indicates a second cell activation mode or a BWP activation mode of the second cell, and the terminal may determine, according to the BWP activation mode of the second cell, at which time units the BWP configured for the second cell is activated. When the BWP configured for the second cell is activated for a certain time unit, the terminal may switch to the second subscriber identity card and communicate with the second network device on the second cell corresponding to the second subscriber identity card. Alternatively, it is determined on which time units the second cell is activated according to the second cell activation pattern. When the second cell is activated in a certain time unit, the terminal may switch to the second subscriber identity card, and communicate with the second network device in the second cell corresponding to the second subscriber identity card.

Illustratively, the first parameter is a first bit sequence of length M indicating an activation mode of the first cell or a BWP activation mode of the first cell. It is assumed that only BWP of one cell can be activated in the same time unit, i.e. in one time unit, either BWP of the first cell is activated or BWP of the second cell is activated. Alternatively, only one cell can be activated in the same time unit, i.e. in one time unit, either the first cell is activated or the second cell is activated. Thus, the terminal may invert the first bit sequence to obtain a second bit sequence. The second bit sequence indicates an activation mode of the second cell or a BWP activation mode of the second cell, and the terminal may determine at which time units the second cell is activated according to the activation mode of the second cell or at which time units the BWP configured for the second cell is activated according to the BWP activation mode of the second cell. For example, at time slot 1, BWP configured for the second cell is activated, and the terminal may switch to the second subscriber identity card and communicate with the second network device on the second cell corresponding to the second subscriber identity card. Or, at time slot 1, the second cell is activated, and the terminal may switch to the second subscriber identity card to communicate with the second network device at the second cell corresponding to the second subscriber identity card.

For example, the first parameter may also be the second bit sequence, and the terminal may determine, directly according to the second bit sequence, which time units the BWP configured for the second cell is activated in, or which time units the second cell is activated in.

In the third mode, the first parameter is a transceiving parameter for the terminal to communicate in the first cell. When the sending capability indicated by the transceiving parameter is lower than the maximum sending capability supported by the terminal, the terminal may determine that the first subscriber identity card and the second subscriber identity card share the sending channel of the terminal, and support the terminal to perform uplink sending on the first cell and the second cell simultaneously. When the receiving capability indicated by the transceiving parameter is lower than the maximum receiving capability supported by the terminal, the terminal may determine that the first subscriber identity card and the second subscriber identity card share the receiving channel of the terminal, and support the terminal to perform downlink reception on the first cell and the second cell simultaneously.

For example, the first parameter includes maxMIMO-Layers, indicating that the terminal supports at most 2Tx uplink transmission on the first cell, and assuming that the terminal supports at most 4Tx transmission, since 4Tx is greater than 2Tx, that is, the transmission capability indicated by the first parameter is lower than the maximum transmission capability supported by the terminal, the terminal may perform communication on the first cell and the second cell simultaneously. Wherein, the terminal uses 2Tx to perform uplink transmission on the first cell, and uses the rest 2Tx to perform uplink transmission on the second cell.

In this embodiment, the first network device and the second network device may be different network devices, and the first cell and the second cell are cells of different network devices. For example, the first network device is a 4G base station, the first cell is a 4G cell, the second network device is a 5G base station, and the second cell is a 5G cell. The terminal supports CA or DC between carriers communicating in the 4G cell, and also supports CA or DC between carriers communicating in the 5G cell.

In addition, the first network device and the second network device may also be the same network device, and the first cell and the second cell are different cells of the same network device. For example, the first network device and the second network device both refer to a certain 5G base station, the first cell is a serving cell 1 of the 5G base station, and the second cell is a serving cell 2 of the 5G base station. The terminal supports CA or DC between carriers communicating on the serving cell 1, and also supports CA or DC between carriers communicating on the serving cell 2.

It should be noted that the communication between the terminal and the second network device on the second cell includes receiving data or sending data, and the RRC state of the terminal may be an RRC connected state, an RRC inactive state, or an RRC idle state.

Optionally, the method shown in fig. 6 further includes: the terminal sends second information to the first network equipment; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal corresponding to different user identification cards.

The maximum transceiving capability supported by the terminal may be the maximum number of transmitting antennas supported by the terminal, or the maximum number of receiving antennas supported by the terminal. The receiving and sending sharing capability of the terminal corresponding to different user identification cards can be the receiving and sending sharing capability of the terminal corresponding to the first user identification card and/or the receiving and sending sharing capability of the terminal corresponding to the second user identification card. For example, the transceiving sharing capability of the terminal corresponding to the first subscriber identity card may indicate whether the terminal supports sharing of a receiving channel when communicating on the first cell, or whether the terminal supports sharing of a transmitting channel when communicating on the first cell. The transceiving sharing capability of the terminal corresponding to the second subscriber identity card may indicate whether the terminal supports sharing of the receiving channel when communicating on the second cell, or whether the terminal supports sharing of the transmitting channel when communicating on the second cell. The receiving and sending sharing capability of the terminal corresponding to the first subscriber identity card can also indicate the sharing degree supported by the terminal when the terminal communicates in the first cell, and the receiving and sending sharing capability of the terminal corresponding to the second subscriber identity card can also indicate the sharing degree supported by the terminal when the terminal communicates in the second cell.

For example, the second information may include a scaling factor, and the number of the receiving channels/transmitting channels supported by the terminal when communicating on the first cell may be determined according to the scaling factor, for example, the scaling factor for indicating the terminal sharing capability in the second information is 50%, assuming that the terminal supports maximum 4Tx transmission on the first cell, and the terminal may be determined to support 2Tx sharing on the first cell according to the scaling factor of 50%, that is, the terminal uses 2Tx for transmission on the first cell, and may also use 2Tx for transmission on the second cell.

For example, the second information may include the number of reception channels/transmission channels that the terminal supports sharing when communicating on the first cell. For example, the parameter indicating the terminal sharing capability in the second information is 1Tx, and assuming that the terminal supports maximum 2Tx transmission on the first cell, the terminal supports 1Tx sharing on the first cell, that is, the terminal transmits using 1Tx on the first cell, and may also transmit using 1Tx on the second cell.

Illustratively, the second information may include maxnumberbtx parameter, sharednbertx parameter. Wherein, the maxnumberbtx parameter is used for indicating the maximum transceiving capability supported by the terminal, and the sharednbertx parameter is used for indicating the transceiving sharing capability of the terminal.

For example, the parameters corresponding to the first subscriber identity card (e.g., SIM card 1) may include: MaxRx1, MaxTx1, SharedRx1, SharedTx 1. Wherein, MaxRx1 represents the maximum receiving capability supported by the communication system corresponding to the first subscriber identity card. For simplicity of description, the capability supported by the subscriber identity card may be briefly described as the capability of the subscriber identity card. MaxTx1 represents the maximum transmit capability supported by the first subscriber identity card, SharedRx1 represents whether the first subscriber identity card supports a shared receive antenna, and SharedTx1 represents whether the first subscriber identity card supports a shared transmit antenna. For example, SharedRx1, SharedTx1 may be 0 or 1, where 0 indicates that sharing is not supported and 1 indicates that sharing is supported; alternatively, SharedRx1, SharedTx1 may be false or true, where false indicates that sharing is not supported and true indicates that sharing is supported.

The parameters corresponding to the second subscriber identity card (e.g., SIM card 2) may include: MaxRx2, MaxTx2, SharedRx2, SharedTx 2. Wherein, MaxRx2 represents the maximum receiving capability supported by the second subscriber identity card, MaxTx2 represents the maximum transmitting capability supported by the second subscriber identity card, SharedRx2 represents whether the second subscriber identity card supports the shared receiving antenna, and SharedTx2 represents whether the second subscriber identity card supports the shared transmitting antenna. The parameter description is the same as the first subscriber identity card capability description.

In addition, MaxTx and MaxRx represent the maximum transmission channel and the maximum reception channel that the terminal can support. MaxTx1+ MaxTx2 ═ MaxTx, MaxRx1+ MaxRx2 ═ MaxRx.

Taking fig. 2c as an example: MaxTx ═ 2; MaxTx1 ═ 1; SharedTx1 ═ 1 (or true); MaxTx2 ═ 2; SharedTx2 ═ 0 (or false);

where one Tx among MaxTx 2-2 is exclusively shared by SIM card 2 and the other is shared by SIM card 1. The SIM card 2 can only be used when the SIM card 1 is not in use.

Optionally, the method shown in fig. 6 further includes: the terminal sends third information to the first network equipment; the third information is used to request the first information.

It can be understood that the terminal decides to leave the first communication system corresponding to the first subscriber identity card because of its own service requirement, that is, the terminal disconnects from the first communication system and accesses the second communication system corresponding to the second subscriber identity card for communication. The terminal may send the third information to the first network device, request disconnection from the first communication system, access the second communication system, and establish connection with the second communication system. After receiving the third information from the terminal, the first network device may send the first information to the terminal, instruct the terminal to switch to the second communication system, and communicate with the second network device in the second cell.

Optionally, the third information further includes a first duration, where the first duration is a duration for the terminal to request to perform communication in the second cell.

Optionally, the method shown in fig. 6 further includes: and the terminal acquires a second time length, wherein the second time length is the time length of the terminal allowed to communicate in the second cell. Illustratively, the terminal may receive the second duration from the first network device. For example, the first network device may carry the second duration in the first information and send the first information to the terminal. When the communication time of the terminal on the second cell exceeds the second time, the terminal may return to the first cell to communicate with the first network device. Returning to the first cell may be the terminal reestablishing an RRC connection with the first network device and communicating with the first network device over the first cell. Or the terminal still maintains the RRC connection with the first cell (or the RRC connection is suspended) when communicating with the second cell, and after the terminal completes communication with the second cell, the terminal directly returns to the communication system corresponding to the first cell to recover the RRC connection, and communicates with the first network device on the first cell.

For another example, the terminal may receive information of a first timer from the first network device, where the first timer is used to limit a duration for which the terminal is allowed to communicate in the second cell. The terminal may start the first timer according to the information of the first timer, and when the first timer is overtime, the terminal may return to the first cell to communicate with the first network device.

It can be understood that the first duration is a duration requested by the terminal itself to communicate in the second cell, and the duration that the first network device finally allows the terminal to communicate in the second cell may be the same as or different from the duration requested by the terminal. That is, the first duration and the second duration may be the same or different, and this is not limited in this embodiment of the application.

Optionally, in the first manner of configuring the first parameter, the first parameter may further include: information of one or more second BWPs activated on the first cell. It should be noted that, unlike the special BWP described above, when the second BWP configured for the first cell is activated, the terminal may perform normal communication on the first cell through the activated second BWP, for example, monitoring PDCCH, receiving PDSCH, measuring CSI, receiving system information, transmitting PUSCH, and the like.

Optionally, in the second manner of configuring the first parameter, when a second BWP configured for the first cell is activated for a certain time unit, the terminal may communicate with the first network device through the second BWP configured for the first cell on the first cell.

Optionally, in a third manner of configuring the first parameter, if the transceiving capability of the terminal for communication on the first cell indicated by the first parameter is equal to the maximum transceiving capability supported by the terminal, the terminal uses all receiving channels/transmitting channels of the terminal when communicating on the first cell. Illustratively, the first parameter indicates that the terminal is supported to perform uplink transmission on the first cell by using 2Tx, the terminal supports maximum 2Tx transmission, the terminal only shares 2Tx when communicating on the first cell, and the terminal performs uplink transmission on the second cell by using 2 Tx.

In the method provided by the application in real time, the first network equipment can also instruct the terminal to switch the user identification card through the first information, the terminal can switch to the second user identification card after receiving the first information, and the second user identification card is used for accessing the second communication system and communicating with the second network equipment in the second communication system. The network side can acquire the behavior of the terminal switching the subscriber identity module, when the terminal switching the subscriber identity module and is disconnected with the first communication system, the first communication system can suspend paging the terminal, and therefore resource waste caused by the fact is avoided; the first communication system can temporarily ignore the terminal when scheduling, thereby avoiding inaccurate scheduling data. Therefore, the method provided by the embodiment of the application can reduce the influence on the communication performance of the communication system when the terminal switches the SIM card to a certain extent.

The embodiment of the present application further provides a method for switching a communication system, taking a dual-card dual-standby terminal as an example, where the terminal includes two SIM cards, i.e., a SIM card 1 and a SIM card 2, and the terminal may use the SIM card 1 to communicate with a RAN1 and may use the SIM card 2 to communicate with a RAN 2. Wherein, the SIM card 1 is a first subscriber identity card according to the embodiment of the present application, the RAN1 is a first communication system according to the embodiment of the present application, and a network device (e.g., a base station) of the RAN1 is a first network device according to the embodiment of the present application; the SIM card 2 is a second subscriber identity card according to the embodiment of the present application, the RAN2 is a second communication system according to the embodiment of the present application, and the network device (e.g., a base station) of the RAN2 is a second network device according to the embodiment of the present application. As shown in fig. 7, the method comprises the steps of:

701. the terminal communicates with the RAN1 using the SIM card 1.

Specifically, the terminal establishes an RRC connection with RAN1 and enters an RRC connected state. For example, the terminal may receive data transmitted by the network device of RAN1 on the first cell and may also transmit data to the network device of RAN1 on the first cell. The first cell is a cell corresponding to the RAN1, and the network device of the RAN1 provides coverage service for the first cell.

702. The terminal sends a radio frequency switching request to the network equipment of the RAN1, where the request includes the communication duration Δ T1 requested by the terminal.

Specifically, when the terminal needs to perform data transceiving in the second cell corresponding to the SIM card 2, the terminal may send a radio frequency handover request to the network device of the RAN1, requesting to handover to the communication system corresponding to the SIM card 2. It should be noted that the second cell is a cell corresponding to the RAN2, and the network device of the RAN2 provides coverage service for the second cell.

It should be noted that the radio frequency handover request may be the third information described in the embodiment of the present application, and the communication duration Δ T1 may be the first duration described in the embodiment of the present application, that is, the duration that the terminal requests to communicate in the second cell.

Illustratively, the radio frequency handover request may be carried in an RRC message.

703. The network device of RAN1 sends handover indication information to the terminal indicating that the terminal is in communication with the network device of RAN2 on the second cell.

Specifically, the handover indication information may be the first information described in the embodiments of the present application. The network device of RAN1 may instruct the terminal to switch from the first cell corresponding to SIM card 1 to the second cell corresponding to SIM card 2 for communication in the following three ways:

in the first method, the terminal is instructed to switch from the first cell corresponding to the SIM card 1 to the second cell corresponding to the SIM card 2 for communication through the BWP configuration and the BWP switching indication.

For the following downlink reception example, assuming that the first cell corresponding to the SIM card 1 is an NR cell (i.e., a serving cell of a 5G base station in the NR communication system), the network device of the RAN1 configures at least two downlink BWPs for the first cell, where one is a normal BWP (i.e., the first BWP described in this embodiment) and the other is a special BWP (which may also be referred to as an idle BWP, a suspend BWP, or a dormant BWP, and this embodiment of this application does not limit the name of this BWP). When the normal BWP is activated, the terminal operates on the normal BWP and performs normal communications, for example, monitoring PDCCH, receiving PDSCH, performing CSI measurement, receiving system information, and the like. When the special bwp (special bwp) is used, no data reception processing is performed, for example, the terminal does not monitor the PDCCH, does not receive the PDSCH, does not perform CSI measurement, does not receive system information, and the like. Wherein the BWP handover indication may be implemented by one of: RRC signaling indication, DCI indication, timer-based BWP handover, or MAC layer flow triggered BWP handover.

In step 703, the handover indication information may include information of the activated special BWP, and after receiving the handover indication information, the terminal determines that the special BWP configured for the first cell is activated, and the terminal may not perform data reception processing on the first cell and may switch to the second cell corresponding to the SIM card 2 to communicate with the network device of the RAN 2. Of course, assuming that the handover indication information includes information of the activated normal BWP, the terminal performs normal communication on the first cell.

Illustratively, referring to FIG. 8, BWP1 is a normal BWP and BWP2 is a special BWP. When the network device of the RAN1 activates BWP2 configured for the first cell through the handover indication information, the terminal switches to the SIM card 2 and communicates with the network device of the RAN2 on the second cell. As shown in fig. 8, BWP1 is activated before time T1, BWP2 configured for the first cell is activated during time T1 to time T2, and the terminal communicates with the network device of RAN2 on the second cell, for example, receives a page (paging) of the network device of RAN 2. After time T1, BWP1 is activated.

In the second way, the terminal is instructed to switch from the first cell corresponding to the SIM card 1 to the second cell corresponding to the SIM card 2 for communication through the BWP activation mode. The BWP activation mode may indicate on which time units the BWP configured for the first cell is activated and may also indicate on which time units the BWP configured for the second cell is activated.

There may be one active BWP for one time unit. At a certain time unit, if BWP configured for the first cell is activated, the terminal communicates with the network device of RAN1 on the first cell; the terminal communicates with the network device of the RAN2 on the second cell if BWP configured for the second cell is activated.

In step 703, the handover indication information indicates a BWP activation mode in which the second cell is activated on one or more time units. For example, the handover information indicates a Time Division Multiplexing (TDM) mode (pattern) of the BWP. Referring to fig. 9, a TDM pattern indicates an activation state of BWP on a first cell and a second cell within a period. For example, '1' means BWP is activated, '0' means BWP is deactivated, or '0' means BWP is activated, '1' means BWP is deactivated.

In a specific implementation, the BWP activation mode of a cell may be represented by a bit sequence. Assume that one bit sequence corresponds to one time unit, taking 4 slots (slots) as an example. The handover indication information includes 0011 indicating a BWP activation mode of the first cell. Referring to fig. 9, at the third time slot and the fourth time slot, BWP configured for the first cell is activated, and the terminal communicates with the network device of the RAN1 on the first cell.

When the terminal supports Q SIM cards, the cells corresponding to SIM card 1 and SIM card 2 … SIM Q are cell 1 and cell 2 … cell Q in turn. The handover indication information may indicate the BWP activation mode of the Q cells, for example, the handover indication information may include Q-1 bit sequences, and the Q-1 bit sequences indicate the BWP activation mode of the Q-1 cells. The bit sequence of the last cell may be obtained by inverting the bit sequences of the other cells to determine the BWP activation mode of the last cell.

For example, referring to table 1, the terminal supports SIM card 1 and SIM card 2, where a cell corresponding to SIM card 1 is a first cell and a cell corresponding to SIM card 2 is a second cell. Table 1 shows the activation patterns of the first and second cells over 5 time units. Specifically, the bit sequence corresponding to the first cell is "11011", and negating "11011" may result in that the bit sequence of the second cell is "00100". That is, BWP configured for the first cell is activated at the first time unit, the second time unit, the fourth time unit, and the fifth time unit; BWP configured for the third cell is activated for a third time unit.

TABLE 1

Cell	TDM pattern
First cell	11011
Second cell	00100

It should be noted that the TDM pattern may indicate whether there is an active BWP (the above-mentioned conventional BWP) in a certain cell, and may indicate which BWP is specifically activated according to the BWP activation mechanism. For example, the network device indicates the first active BWP on the cell through (firstActiveBWP) in the RRC message, and then may also perform BWP handover through RRC configuration, DCI, BWP timer, and control of the MAC layer.

In the third mode, the network side may instruct the terminal to communicate on cells corresponding to different SIM cards by controlling transceiving parameters (e.g., receiving parameters or sending parameters) of the terminal on different SIM cards.

In step 703, the handover indication information may include transceiving parameters of the terminal on the first cell, and the terminal may determine transceiving capability of the terminal on the first cell according to the transceiving parameters of the terminal on the first cell, and determine to perform communication on the first cell or perform communication on the first cell and the second cell by comparing the transceiving parameters on the first cell with the maximum transceiving capability supported by the terminal.

As shown in fig. 2c, SIM card 1 and SIM card 2 of the terminal share 2Tx, i.e. the two transmission channels of the terminal are SIM card 1 and SIM card 2 and shared. The terminal may report the maximum transceiving capability supported by the terminal and the transceiving sharing capability of the terminal on the SIM card 1 to the first network device before step 703. For example, the terminal supports 2Tx when communicating on the first cell corresponding to the SIM card 1, and wherein 1Tx is shared with other systems. That is, when the terminal only uses the SIM card 1, the data can be transmitted through two transmission channels at maximum in the first cell; when the terminal uses the SIM card 1 and the SIM card 2, the data is transmitted on the first cell through one transmission channel, and the data is transmitted on the second cell through the other transmission channel.

The parameters reported by the terminal to the first network device may be "maxnumberbtx: 2, sharednberg tx:1 ", where" maxnumberbtx: 2 "indicates that the terminal supports 2Tx when communicating on the first cell corresponding to the SIM card 1, and" sharednberg Tx:1 "indicates that the terminal supports sharing 1Tx with other systems.

Optionally, the terminal may also report other capability parameters to implicitly indicate the transceiving capability of the terminal on the first cell. For example, the terminal may report a parameter indicating a number of multiple-input multiple-output (MIMO) layers, which may be one or more of the following two parameters: maxnumberbmimo-LayersCB-PUSCH parameter, maxnumberbmimo-layersnobb-PUSCH parameter, which may indicate the maximum number of MIMO layers supported by PUSCH. For example, the two parameters are "2", indicating that the terminal supports maximum 2Tx transmission on the first cell.

After the first network device determines the transceiving capacity of the terminal on the first cell according to the parameters reported by the terminal, the first network device can also indicate the transceiving parameters on the first cell to the terminal through the switching indication information.

In a specific implementation, the first network device may further carry the transceiving parameter on the first cell through the BWP configuration parameter, that is, the handover indication information may be the BWP configuration parameter. Specifically, the following parameters in the configuration parameters of the uplink BWP are related to the number of uplink transmitting antennas: txConfig, codebook Subset and maxRank parameters in PUSCH-Config IE, or maxMIMO-Layers parameters in PUSCH-ServinCellConfig IE. The first network device may indicate the transmission parameters of the terminal on the first cell through these parameters, for example, the terminal supports 2Tx on the first cell, that is, the terminal supports maximum 2 transmission channels for transmitting data on the first cell.

The configuration parameters of the downlink BWP include the following parameters related to the number of downlink receiving antennas: maxNrofCodeWordsSchedulByDCI parameter in PDSCH-Config IE. The first network device may indicate the reception parameters of the terminal on the first cell through these parameters, for example, the terminal supports 2Rx on the first cell, that is, the terminal supports maximum reception of data using 2 reception channels on the first cell.

For example, referring to fig. 10, among the configuration parameters of BWP1, a parameter related to the number of transmit antennas indicates that the terminal supports 2Tx transmission; among the configuration parameters of BWP2, the parameter related to the number of receive antennas indicates that the terminal supports only 1Tx transmission. When switching from BWP1 to BWP2, i.e. time T3 to time T4 shown in fig. 10, the terminal may support data transmission on both SIM card 1 and SIM card 2, i.e. the terminal may communicate with the network device of RAN1 in the first cell and may also communicate with the network device of RAN2 in the second cell at time T3 to time T4. Therefore, the method provided by the embodiment of the application makes full use of the capability of the terminal and improves the system performance.

Optionally, the handover indication information may further include a second time duration Δ T2, which is a time duration for which the terminal is allowed to communicate in the second cell. The second time duration may be considered as the time duration of communication by using the SIM card 2 after the terminal is switched to the SIM card 2. It should be noted that the second time duration Δ T2 is not limited in the embodiments of the present application, for example, the second time duration Δ T2 may be greater than the first time duration Δ T1, or may be less than or equal to the first time duration Δ T1.

It should be noted that, the radio frequency handover duration Δ T2 indicated by the handover indication information of the terminal by the network device of the RAN1 may be the same as or different from Δ T1 requested by the terminal, which is not limited in this embodiment of the present application.

704. The terminal communicates with the network equipment of RAN2 on a second cell of the communication system registered with SIM card 2.

Specifically, the terminal may determine that communication with the network device of the RAN2 may be performed on the second cell according to the handover indication information of step 703. For example, the handover indication information indicates that a special BWP configured for the first cell is activated, and the terminal may communicate with the network device of RAN2 on the second cell. Alternatively, the handover indication information indicates that the conventional BWP configured for the first cell is not activated, and the terminal may communicate with the network device of the RAN2 on the second cell. Still alternatively, the handover indication information indicates the maximum transceiving capability supported by the terminal in the transceiving capability of the cell in the first cell, the SIM card 1 and the SIM card 2 may share the transmission channel (or the reception channel), and the terminal may communicate with the network device of the RAN2 in the second cell and communicate with the network device of the RAN1 in the first cell.

In addition, the terminal can also perform radio frequency switching, wherein the radio frequency switching refers to switching a receiving channel and/or a transmitting channel. Taking the terminal structure shown in fig. 2a as an example, in step 701, the SIM card 1 of the terminal is connected to the radio frequency circuit, and receives data using the receiving channel and transmits data using the transmitting channel. In step 704, the SIM card 2 of the terminal is connected to the rf circuit, and receives data through the receive channel and transmits data through the transmit channel.

Taking the terminal structure shown in fig. 2b as an example, the SIM card 1 and the SIM card 2 of the terminal have independent receiving channels, and the SIM card 1 and the SIM card 2 share the same transmitting channel. In step 701, the terminal receives data through a receiving channel formed by the radio frequency circuit 1 and the antenna 1, and sends data through a sending channel formed by the radio frequency circuit 1 and the antenna 1. In step 704, the terminal receives data through a receiving channel formed by the rf circuit 2 and the antenna 2, and transmits data through a transmitting channel formed by the rf circuit 1 and the antenna 1.

Taking the terminal structure shown in fig. 2c as an example, the SIM card 1 and the SIM card 2 of the terminal have independent receiving channels and independent sending channels. In step 701, the terminal receives data through a receiving channel formed by the radio frequency circuit 1 and the antenna 1, and sends data through a sending channel formed by the radio frequency circuit 1 and the antenna 1. In step 704, the terminal receives data through the receiving channel formed by the rf circuit 2 and the antenna 2, and transmits data through the transmitting channel formed by the rf circuit 2 and the antenna 2.

It should be noted that, after performing radio frequency handover, the terminal may perform data transmission and reception on the second cell, for example, when the terminal is in an RRC idle (RRC idle) state, the terminal may receive a paging message sent by the network device of the RAN 2.

705. When the second duration Δ T2 is met, the terminal returns to the first cell and communicates with the network equipment of the RAN 1.

In specific implementations, the second duration Δ T2 may be controlled in several ways:

first, when the second duration Δ T2 is satisfied, the network device of the RAN1 sends a BWP handover indication to the terminal, where the BWP handover indication includes information of a conventional BWP. And after receiving the BWP switching indication, the terminal determines that the conventional BWP configured for the first cell is activated and switches from the special BWP to the conventional BWP. When the conventional BWP configured for the first cell is activated, the terminal may normally transit on the first cell, and thus the terminal may perform a radio frequency handover back to the first cell to communicate with the network device of RAN 1.

Second, the terminal may start the timer according to the timer information acquired from the network device of RAN 1. The timer is used for limiting the time length of the terminal allowed to communicate in the second cell, and when the timer is overtime, the terminal performs radio frequency switching and returns to the communication system corresponding to the SIM card 1.

Third, the network device of RAN1 may indicate the second duration Δ T2 to the terminal. For example, a new indication field may be added to the BWP handover indication sent to the terminal, and the second duration Δ T2 is indicated by a value filled in the indication field, and the second duration Δ T2 time unit may be a symbol, a slot, a subframe, and the like, which is not limited by the embodiment of the present invention.

In the embodiment of the application, a network side can control the sending behavior or the receiving behavior of a multi-SIM card terminal on different SIMs through switching indication information (namely, the first information in the embodiment of the application), the network side can know the behavior of switching a Subscriber Identity Module (SIM) card by the terminal, when the Subscriber Identity Module (SIM) card is switched by the terminal, a communication system corresponding to the SIM card 1 is disconnected, the communication system of the SIM card 1 can suspend paging the terminal, and therefore resource waste is avoided; the communication system of the SIM card 1 can also temporarily ignore the terminal in the scheduling process, thereby avoiding inaccurate scheduling data. In a word, the method provided by the embodiment of the application can reduce the influence on the communication performance of the communication system when the terminal switches the SIM card to a certain extent.

As shown in fig. 11, yet another embodiment of the present application provides an apparatus 110. The device may be a terminal or a component of a terminal (e.g., an integrated circuit, a chip, etc.). The apparatus may also be a network device, and may also be a component of a network device (e.g., an integrated circuit, a chip, etc.). The apparatus may also be other communication units, which are used to implement the method in the method embodiment of the present application. The apparatus 110 may include a processing unit 1102 (processing module). Optionally, a transceiver 1101 (transceiver module) and a storage 1103 (storage module) may also be included.

In one possible design, one or more of the elements in FIG. 11 may be implemented by one or more processors or by one or more processors and memory; or by one or more processors and transceivers; or by one or more processors, memories, and transceivers, which are not limited in this application. The processor, the memory and the transceiver can be arranged independently or integrated.

The apparatus has a function of implementing the terminal device described in the embodiment of the present application, for example, the apparatus includes a module or a unit or means (means) corresponding to the step of executing the terminal device described in the embodiment of the present application by the terminal device, and the function or the unit or the means (means) may be implemented by software or hardware, or may be implemented by hardware executing corresponding software, or may be implemented by a combination of software and hardware. Reference may be made in detail to the respective description of the corresponding method embodiments hereinbefore.

Or the apparatus has a function of implementing the network device described in the embodiment of the present application, for example, the apparatus includes a module or a unit or means (means) corresponding to the step of executing the network device described in the embodiment of the present application by the network device, and the function or the unit or the means (means) may be implemented by software or hardware, or may be implemented by hardware executing corresponding software, or may be implemented by a combination of software and hardware. Reference may be made in detail to the respective description of the corresponding method embodiments hereinbefore.

Optionally, each module in the apparatus 110 in the embodiment of the present application may be configured to perform the method described in fig. 6 or fig. 7 in the embodiment of the present application.

In one possible implementation, an apparatus 110 may include a processing unit 1102 and a transceiver unit 1101.

In one possible design, the transceiving unit 1101 receives first information from a first network device, the first information including a first parameter for a terminal (e.g., apparatus 110) to communicate with the first network device on a first cell, the first parameter indicating that the terminal is communicating on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal.

The processing unit 1102 may process the first information received by the transceiver unit 1101 to obtain a first parameter therefrom.

The transceiving unit 1101 may communicate with a second network device on said second cell.

In this embodiment, a network side and a terminal side (for example, the device 110) unify behaviors of a terminal (the device 110) switching a communication system corresponding to a subscriber identity module, and the network side can acquire the behavior of the terminal switching the communication system corresponding to the subscriber identity module; in a word, the method provided by the embodiment of the application can reduce the influence on the communication performance of the communication system when the terminal switches the SIM card to a certain extent.

In this embodiment, the network device may indicate an active BWP through the first parameter, where the terminal (e.g., the apparatus 110) may communicate with the second cell on the active BWP, the network device may switch the behavior of the communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging the terminal or suspend state statistics on the terminal, thereby avoiding waste of resources.

In this embodiment, the network device may indicate, by the first parameter, the PWP activation mode of the second cell, i.e. on which time units there is active BWP on the second cell. In addition, on the BWP activated by the second cell, the terminal (e.g., the apparatus 110) may communicate with the second cell, may control the behavior of the terminal to switch the communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging the terminal or suspend state statistics for the terminal, thereby avoiding waste of resources.

In one possible design, the first parameter includes a first bit sequence of length M and/or a second bit sequence of length M;

wherein the first bit sequence corresponds to N time units, one bit in the first bit sequence is used for indicating that BWP configured on the first cell is activated on one or more time units in the N time units, and M is less than or equal to N; the second bit sequence corresponds to the N time units, and one bit in the second bit sequence is used to indicate that BWP configured on the second cell is activated on one or more time units in the N time units.

In this embodiment, the BWP activated on the first cell and/or the BWP activated on the second cell may be indicated by a bit sequence, where the terminal (for example, the apparatus 110) may communicate with the first cell on the BWP activated on the first cell, and the terminal may communicate with the second cell on the BWP activated on the second cell, and the network device may control, by using the first parameter, the behavior of the terminal to switch the communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging of the terminal or suspend state statistics on the terminal, thereby avoiding waste of resources.

In this embodiment, the transceiving capability of the terminal on the first cell may also be indicated by the first parameter, and when the transceiving capability indicated by the transceiving parameter is lower than the maximum transceiving capability supported by the terminal (e.g., the device 110), the first subscriber identity card and the second subscriber identity card supporting the terminal share a receiving channel or a transmitting channel of the terminal, so as to support the terminal to perform simultaneous communication on the first cell and the second cell. The network equipment can control the behavior of the terminal switching user identification card corresponding to the communication system through the first parameter, and when the terminal is disconnected with the first communication system, the network equipment can suspend paging of the terminal or suspend state statistics of the terminal, so that resource waste caused by the fact is avoided.

In one possible design, the transceiving unit 1101 may further send second information to the first network device; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal.

In this embodiment, the terminal (e.g., the device 110) may also report its maximum transceiving capability and transceiving sharing capability to the network device, so that the network device instructs the terminal to share the transceiving channel or switch the transceiving channel according to the first parameter, and may also control the terminal to switch the behavior of the communication system corresponding to the subscriber identity module.

In one possible design, the transceiving unit 1101 may further send third information to the first network device; the third information is used to request the first information.

In this embodiment, the terminal (e.g., the device 110) may further request the network device for the first information before switching the communication system (SIM card), and may further switch to the second cell for communication according to the first information. The network side can acquire the behavior of the communication system corresponding to the user identification card switched by the terminal, thereby avoiding the resource waste caused by the behavior.

In one possible design, the third information includes a first duration, where the first duration is a duration for which the terminal requests to communicate in the second cell.

In this embodiment, the terminal (for example, the device 110) may also report, to the network device, a time duration requested by the terminal to perform communication in the second cell, so that the network device limits, according to an actual communication requirement of the terminal, a time duration for the terminal to switch from the first communication system to the second communication system to perform communication.

In one possible design, the transceiver unit 1101 may further obtain a second duration, where the second duration is a duration that the terminal is allowed to communicate in the second cell.

In this embodiment of the present application, a terminal (for example, the device 110) obtains a duration of communication performed in the second cell, which is defined by the network device, and then performs communication in the second cell according to the duration allowed by the duration of the network device, so as to avoid inconsistency between behaviors of a network side and a terminal side (the device 110), where the network side may determine a behavior of the device 110 in switching a communication system corresponding to a subscriber identity card.

In another possible implementation, an apparatus 110 may include a processing unit 1102 and a transceiver unit 1101.

In one possible design, the processing unit 1102 generates the first information; the first information includes a first parameter for the terminal to communicate with a first network device (e.g., the apparatus 110) on a first cell, the first parameter indicating that the terminal is to communicate on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal;

the transceiving unit 1101 may transmit the first information to the terminal.

In this embodiment of the present application, the network side (for example, the device 110) and the terminal side unify the behaviors of the communication systems corresponding to the terminal switching subscriber identity module, and the network side can acquire the behavior of the communication systems corresponding to the terminal switching subscriber identity module; in a word, the method provided by the embodiment of the application can reduce the influence on the communication performance of the communication system when the terminal switches the SIM card to a certain extent.

In this embodiment, the network device (e.g., the apparatus 110) may indicate the active BWP through the first parameter, on the active BWP, the terminal may communicate with the second cell, may switch the behavior of the communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging the terminal or suspend state statistics on the terminal, thereby avoiding waste of resources.

In an embodiment of the present application, a network device (e.g., apparatus 110) may indicate, via a first parameter, a PWP activation mode, i.e., on which time units there is active BWP on a second cell. In addition, the terminal can communicate with the second cell on the BWP activated by the second cell, and can control the behavior of the terminal to switch the communication system corresponding to the subscriber identity card.

In this embodiment, a network device (e.g., the apparatus 110) may indicate, by a bit sequence, an active BWP on a first cell and/or an active BWP on a second cell, where the terminal may communicate with the first cell on the active BWP of the first cell, and the terminal may communicate with the second cell on the active BWP of the second cell, and may control, by using a first parameter, a behavior of the terminal to switch a communication system corresponding to the subscriber identity card, and when the terminal is disconnected from the first communication system, the network device may suspend paging of the terminal or suspend state statistics on the terminal, thereby avoiding waste of resources.

In this embodiment, the network device (e.g., the apparatus 110) may further indicate, by the first parameter, the transceiving capability of the terminal on the first cell, and when the transceiving capability indicated by the transceiving parameter is lower than the maximum transceiving capability supported by the terminal, the first subscriber identity card and the second subscriber identity card supporting the terminal share a receiving channel or a transmitting channel of the terminal, and the terminal is supported to perform simultaneous communication on the first cell and the second cell. The network equipment can control the behavior of the terminal switching user identification card corresponding to the communication system through the first parameter, and when the terminal is disconnected with the first communication system, the network equipment can suspend paging of the terminal or suspend state statistics of the terminal, so that resource waste caused by the fact is avoided.

In one possible design, the transceiver unit 1101 may also receive second information from the terminal; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal.

In this embodiment, the network device (e.g., the apparatus 110) obtains the maximum transceiving capability of the terminal and the transceiving sharing capability of the terminal, so as to instruct the terminal to share the transceiving channel or switch the transceiving channel according to the first parameter, and thus may control the terminal to switch the behavior of the communication system corresponding to the subscriber identity module.

In one possible design, the transceiver unit 1101 may also receive third information from the terminal; the third information is used to request the first information.

In this embodiment, before the terminal switches the communication system (SIM card), the network device (e.g., the device 110) may further obtain a request of the terminal, and further send the first information to the terminal in response to the request, and the terminal switches to the second cell for communication according to the first information. The network side can acquire the behavior of the communication system corresponding to the user identification card switched by the terminal, thereby avoiding the resource waste caused by the behavior.

In one possible design, the third information further includes a first duration, where the first duration is a duration for which the terminal requests to perform communication in the second cell.

In this embodiment, the network device (for example, the device 110) may further obtain a time duration, which is reported by the terminal and used for performing communication in the second cell, so as to limit the time duration, during which the terminal is switched from the first communication system to the second communication system for performing communication, according to an actual communication requirement of the terminal.

In one possible design, the transceiver unit 1101 may further send information of a second duration to the terminal, where the second duration is a duration that the terminal is allowed to communicate in the second cell.

In this embodiment of the present application, the network device (for example, the apparatus 110) may limit a duration of the terminal performing communication in the second cell, and the terminal performs communication through the second cell within a duration allowed by the duration of the network device, so as to avoid inconsistency between behaviors of the network side and the terminal side, and the network side may determine a behavior of the terminal switching subscriber identity module corresponding to the communication system.

The embodiment of the application provides a computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium; the instructions are for performing a method as described in fig. 6 or fig. 7.

Embodiments of the present application provide a computer program product comprising instructions, which when run on a communication apparatus, cause the communication apparatus to implement a method as described in fig. 6 or fig. 7.

An embodiment of the present application provides a wireless communication apparatus, including: instructions are stored in the wireless communication device; when the wireless communication device is operated on the communication device shown in fig. 5a, 5b, 11, the communication device is caused to implement the method as shown in fig. 6 or 7. The wireless communication device may be a chip or the like.

It is understood that some optional features in the embodiments of the present application may be implemented independently without depending on other features in some scenarios, such as a currently-based solution, to solve corresponding technical problems and achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the apparatuses provided in the embodiments of the present application may also implement these features or functions, which are not described herein again.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

It should be understood that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.

The techniques described herein may be implemented by various means. For example, these techniques may be implemented in hardware, software, or a combination of hardware and software. For a hardware implementation, the processing units used to perform these techniques at a communication device (e.g., a base station, terminal, network entity, or chip) may be implemented in one or more general-purpose processors, DSPs, digital signal processing devices, ASICs, programmable logic devices, FPGAs, or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combinations of the above. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The present application also provides a computer-readable medium having stored thereon a computer program which, when executed by a computer, performs the functions of any of the method embodiments described above.

The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply an execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It should also be understood that, in the present application, "when …", "if" and "if" all refer to the fact that the UE or the base station will perform the corresponding processing under certain objective conditions, and are not limited time, and do not require the UE or the base station to perform certain judgment actions, nor do they mean that there are other limitations.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. mentioned in this application are only used for the convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the sequence.

Reference in the present application to an element using the singular is intended to mean "one or more" rather than "one and only one" unless specifically stated otherwise. In the present application, unless otherwise specified, "at least one" is intended to mean "one or more" and "a plurality" is intended to mean "two or more".

Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A can be singular or plural, and B can be singular or plural.

The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Herein, the term "at least one of … …" or "at least one of … …" means all or any combination of the listed items, e.g., "at least one of A, B and C", may mean: the compound comprises six cases of separately existing A, separately existing B, separately existing C, simultaneously existing A and B, simultaneously existing B and C, and simultaneously existing A, B and C, wherein A can be singular or plural, B can be singular or plural, and C can be singular or plural.

It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

The correspondence shown in the tables in the present application may be configured or predefined. The values of the information in each table are only examples, and may be configured to other values, which is not limited in the present application. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present application, the correspondence shown in some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables may be used.

Predefinition in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The same or similar parts between the various embodiments in this application may be referred to each other. In the embodiments and the implementation methods/implementation methods in the embodiments in the present application, unless otherwise specified or conflicting in logic, terms and/or descriptions between different embodiments and between various implementation methods/implementation methods in various embodiments have consistency and can be mutually cited, and technical features in different embodiments and various implementation methods/implementation methods in various embodiments can be combined to form new embodiments, implementation methods, or implementation methods according to the inherent logic relationships thereof. The above-described embodiments of the present application do not limit the scope of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for handoff in a communication system, comprising:

the method comprises the steps that a terminal receives first information from first network equipment, wherein the first information comprises a first parameter of the terminal for communicating with the first network equipment on a first cell, and the first parameter indicates that the terminal communicates on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal;

and the terminal communicates with second network equipment on the second cell.
The method of claim 1, wherein the first parameter comprises: information of one or more first bandwidth parts BWP activated on the first cell.
The method of claim 1, wherein the first parameter indicates that BWP configured on the second cell is activated for one or more time units.
The method according to claim 3, wherein the first parameter comprises a first bit sequence of length M and/or a second bit sequence of length M;

wherein the first bit sequence corresponds to N time units, one bit in the first bit sequence is used for indicating that BWP configured on the first cell is activated on one or more time units in the N time units, and M is less than or equal to N; the second bit sequence corresponds to the N time units, and one bit in the second bit sequence is used to indicate that BWP configured on the second cell is activated on one or more time units in the N time units.
The method of claim 1, wherein the first parameter indicates a transceiving capability of the terminal on the first cell, and wherein the transceiving capability of the terminal on the first cell is lower than a maximum transceiving capability supported by the terminal.
The method of claim 5, further comprising:

the terminal sends second information to the first network equipment; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal.
The method according to any one of claims 1-6, further comprising:

the terminal sends third information to the first network equipment; the third information is used to request the first information.
The method of claim 7, wherein the third information comprises a first duration, and wherein the first duration is a duration for which the terminal requests to communicate in the second cell.
The method according to claim 7 or 8, characterized in that the method further comprises:

and the terminal acquires a second time length, wherein the second time length is the time length of the terminal allowed to communicate in the second cell.
A method for handoff in a communication system, comprising:

the first network equipment generates first information; the first information comprises a first parameter of the terminal for communicating with the first network equipment on a first cell, and the first parameter indicates that the terminal communicates on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal;

and the first network equipment sends the first information to the terminal.
The method of claim 10, wherein the first parameter comprises: information of one or more first bandwidth parts BWP activated on the first cell.
The method of claim 10, wherein the first parameter indicates that BWP configured on the second cell is activated for one or more time units.
The method according to claim 12, wherein the first parameter comprises a first bit sequence of length M and/or a second bit sequence of length M;

wherein the first bit sequence corresponds to N time units, one bit in the first bit sequence is used for indicating that BWP configured on the first cell is activated on one or more time units in the N time units, and M is less than or equal to N; the second bit sequence corresponds to the N time units, and one bit in the second bit sequence is used to indicate that BWP configured on the second cell is activated on one or more time units in the N time units.
The method of claim 10, wherein the first parameter indicates a transceiving capability of the terminal on the first cell, and wherein the transceiving capability of the terminal on the first cell is lower than a maximum transceiving capability supported by the terminal.
The method of claim 14, further comprising:

the first network equipment receives second information from the terminal; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal.
The method according to any one of claims 10-15, further comprising:

the first network equipment receives third information from the terminal; the third information is used to request the first information.
The method of claim 16, wherein the third information further comprises a first duration, and wherein the first duration is a duration for which the terminal requests to communicate in the second cell.
The method of claim 17, further comprising:

and the first network equipment sends information of a second time length to the terminal, wherein the second time length is the time length of the terminal allowed to communicate in the second cell.
A communications apparatus, comprising:

a transceiver unit, configured to receive first information from a first network device, where the first information includes a first parameter for a terminal to communicate with the first network device on a first cell, and the first parameter indicates that the terminal is to communicate on a second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal;

the processing unit is used for processing the first information to obtain the first parameter;

the transceiver unit is further configured to communicate with a second network device on the second cell.
The apparatus of claim 19, wherein the first parameter comprises: information of one or more first bandwidth parts BWP activated on the first cell.
The apparatus of claim 19, wherein the first parameter indicates that BWP configured on the second cell is activated for one or more time units.
The apparatus according to claim 21, wherein the first parameter comprises a first bit sequence of length M and/or a second bit sequence of length M;

wherein the first bit sequence corresponds to N time units, one bit in the first bit sequence is used for indicating that BWP configured on the first cell is activated on one or more time units in the N time units, and M is less than or equal to N; the second bit sequence corresponds to the N time units, and one bit in the second bit sequence is used to indicate that BWP configured on the second cell is activated on one or more time units in the N time units.
The apparatus of claim 19, wherein the first parameter indicates a transceiving capability of the terminal on the first cell, and wherein the transceiving capability of the terminal on the first cell is lower than a maximum transceiving capability supported by the terminal.
The apparatus of claim 23, wherein the transceiver unit is further configured to send second information to the first network device; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal.
The apparatus according to any of claims 19-24, wherein the transceiver unit is further configured to send third information to the first network device; the third information is used to request the first information.
The apparatus of claim 25, wherein the third information further comprises a first duration, and wherein the first duration is a duration for which the terminal requests to communicate in the second cell.
The apparatus according to claim 25 or 26, further comprising a processing unit,

the processing unit is configured to obtain a second duration, where the second duration is a duration for which the terminal is allowed to communicate in the second cell.
A communications apparatus, comprising:

a processing unit for generating first information; the first information comprises a first parameter of the terminal for communicating with the first network equipment on the first cell, and the first parameter indicates that the terminal communicates on the second cell; the first cell corresponds to a first subscriber identity card of the terminal, and the second cell corresponds to a second subscriber identity card of the terminal;

and the receiving and sending unit is used for sending the first information to the terminal.
The apparatus of claim 28, wherein the first parameter comprises: information of one or more first bandwidth parts BWP activated on the first cell.
The apparatus of claim 28, wherein the first parameter indicates that BWP configured on the second cell is activated for one or more time units.
The apparatus of claim 30, wherein the first parameter comprises a first bit sequence of length M and/or a second bit sequence of length M;

wherein the first bit sequence corresponds to N time units, one bit in the first bit sequence is used for indicating that BWP configured on the first cell is activated on one or more time units in the N time units, and M is less than or equal to N; the second bit sequence corresponds to the N time units, and one bit in the second bit sequence is used to indicate that BWP configured on the second cell is activated on one or more time units in the N time units.
The apparatus of claim 28, wherein the first parameter indicates a transceiving capability of the terminal on the first cell, and wherein the transceiving capability of the terminal on the first cell is lower than a maximum transceiving capability supported by the terminal.
The apparatus of claim 32, wherein the transceiver unit is further configured to receive second information from the terminal; the second information is used for indicating the maximum transceiving capacity supported by the terminal and the transceiving sharing capacity of the terminal.
The apparatus according to any of claims 28-33, wherein the transceiver unit is further configured to receive third information from the terminal; the third information is used to request the first information.
The apparatus of claim 34, wherein the third information further comprises a first duration, and wherein the first duration is a duration for which the terminal requests to communicate in the second cell.
The apparatus of claim 35, wherein the transceiver unit is further configured to send information of a second duration to the terminal, and wherein the second duration is a duration for which the terminal is allowed to communicate in the second cell.
A communication apparatus, characterized in that the apparatus is configured to perform the method according to any of claims 1 to 9.
A communications apparatus, characterized in that the apparatus is configured to perform the method of any of claims 10 to 18.
A communications apparatus, comprising: a processor coupled with a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1 to 9.
A communications apparatus, comprising: a processor coupled with a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 10 to 18.
A storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any one of claims 1 to 9.
A storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any of claims 10 to 18.
A communication system, comprising: the device of any one of claims 19 to 27, and/or the device of any one of claims 28 to 36.
A communication system, comprising: the apparatus as claimed in claim 37, and/or the apparatus as claimed in claim 38.
A communication system, comprising: an apparatus as claimed in claim 39, and/or an apparatus as claimed in claim 40.