Rat camping methods, intra-station cross-standard cell handover methods, apparatuses, terminal, network side device, medium and computer program product

Abstract

The present application belongs to the technical field of communications. Disclosed are RAT camping methods, intra-station cross-standard cell handover methods, apparatuses, a terminal, a network side device, a medium and a computer program product. An RAT camping method of the embodiments of the present application comprises: when camping on first RAT and second RAT, a terminal receives first instruction information from a network side device, the first instruction information being used for instructing the terminal to execute a first operation on the second RAT; and, on the basis of the first instruction information, the terminal executes the first operation on the second RAT, the network side device being a core network device or access network device corresponding to the first RAT, or the network side device being a core network device or access network device corresponding to the second RAT, and the first operation being a power saving-related operation.

Description

Rat camping method, co-site cross-technology cell handover method, device, terminal, network side equipment, medium and computer program product

[0001] Cross-reference of Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411086980.1 filed on August 08, 2024 in China, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and specifically relates to a RAT camping method, a co-site cross-technology cell handover method, a device, a terminal, a network side equipment, a medium and a computer program product. BACKGROUND

[0004] With the development of communication technology, a terminal can usually register in multiple mode networks to camp on different radio access technology (RAT) cells. For example, the terminal can switch between different mode RAT cells, or simultaneously camp on two independent RAT cells to obtain faster data transmission rate, so that users can obtain better online experience.

[0005] Therefore, how to further improve the effect of terminal registration and camping in multiple mode networks is an urgent problem to be solved. SUMMARY

[0006] The present application provides a RAT camping method, a co-site cross-technology cell handover method, a device, a terminal, a network side equipment, a medium and a computer program product, which can further improve the effect of terminal registration and camping in multiple mode networks.

[0007] In a first aspect, a RAT camping method is provided, which is executed by a terminal, and the method comprises: in a case where the terminal camps on a first RAT and a second RAT, the terminal receives first indication information from a network side equipment, the first indication information being used to instruct the terminal to perform a first operation on the second RAT; and the terminal performs the first operation on the second RAT based on the first indication information; wherein the network side equipment is a core network equipment or an access network equipment corresponding to the first RAT, or the network side equipment is a core network equipment or an access network equipment corresponding to the second RAT; and the first operation is a power saving related operation.

[0008] In a second aspect, a RAT camping method is provided, which is performed by a network side device, and includes: in a case where a terminal camps on a first RAT and a second RAT, the network side device sends first indication information to the terminal, the first indication information being used to instruct the terminal to perform a first operation on the second RAT; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; and the first operation is a power saving related operation.

[0009] In a third aspect, a same-site cross-standard cell handover method is provided, which is performed by a terminal, and includes: in a process in which the terminal performs data transmission through a first RAT, the terminal receives a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT, the first message being used to instruct to perform a Multi Radio Spectrum Sharing (MRSS) cell handover; and the terminal switches to a second cell corresponding to a second RAT based on the first message, and updates a first parameter of the terminal, the first parameter including at least one of the following: a context parameter and a security parameter.

[0010] In a fourth aspect, a same-site cross-standard cell handover method is provided, which is performed by a network side device, and includes: in a process in which a terminal performs data transmission through a first RAT, an access network device sends a first message to the terminal, the first message being used to instruct an MRSS cell handover; wherein the first message is used to switch from a first cell corresponding to the first RAT to a second cell corresponding to a second RAT, and to update a first parameter of the terminal, the first parameter including at least one of the following: a context parameter and a security parameter; and the access network device is an access network device corresponding to the first RAT and the second RAT.

[0011] In a fifth aspect, a RAT camping apparatus is provided, which includes: a receiving module and a processing module; the receiving module is configured to receive first indication information from a network side device in a case where a terminal camps on a first RAT and a second RAT, the first indication information being used to instruct the terminal to perform a first operation on the second RAT; and the processing module is configured to perform the first operation on the second RAT based on the first indication information received by the receiving module; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; and the first operation is a power saving related operation.

[0012] In a sixth aspect, a RAT camping apparatus is provided, which comprises: a sending module; the sending module is configured to send first indication information to a terminal, the first indication information is used to instruct the terminal to perform a first operation in a second RAT, in a case that the terminal camps on a first RAT and the second RAT; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; the first operation is a power saving related operation.

[0013] In a seventh aspect, a same-site cross-RAT cell handover apparatus is provided, which comprises: a receiving module and a processing module;

[0014] The receiving module is configured to receive a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT during data transmission of the terminal through the first RAT, the first message is used to instruct to perform MRSS cell handover; the processing module is configured to switch to a second cell corresponding to a second RAT based on the first message received by the receiving module, and update a first parameter of the terminal, the first parameter comprises at least one of the following: a context parameter and a security parameter.

[0015] In an eighth aspect, a same-site cross-RAT cell handover apparatus is provided, which comprises: a sending module; the sending module is configured to send a first message to a terminal during data transmission of the terminal through a first RAT, the first message is used to instruct MRSS cell handover; wherein the first message is used to switch the terminal from a first cell corresponding to the first RAT to a second cell corresponding to a second RAT, and update a first parameter of the terminal, the first parameter comprises at least one of the following: a context parameter and a security parameter; the access network device is an access network device corresponding to the first RAT and the second RAT.

[0016] In a ninth aspect, a RAT camping apparatus is provided, which is configured to perform the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0017] In a tenth aspect, a same-site cross-RAT cell handover apparatus is provided, which is configured to perform the steps of the method according to the third aspect, or implement the steps of the method according to the fourth aspect.

[0018] In an eleventh aspect, a terminal is provided, which comprises a processor and a memory, the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement the steps of the method according to the first aspect or the third aspect.

[0019] In a twelfth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is configured to receive first indication information from a network-side device, and the processor is configured to perform a first operation on a second RAT based on the first indication information; or the communication interface is configured to receive a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT, and the processor is configured to switch to a second cell corresponding to the second RAT based on the first message and update a first parameter of the terminal.

[0020] In a thirteenth aspect, a network-side device is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect or the fourth aspect.

[0021] In a fourteenth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the communication interface is configured to send first indication information to a terminal; or the communication interface is configured to send a first message to the terminal.

[0022] In a fifteenth aspect, a readable storage medium is provided, wherein the readable storage medium stores programs or instructions, and the programs or instructions, when executed by a processor, implement the steps of the method according to the first aspect, or implement the method according to the second aspect, or implement the method according to the third aspect, or implement the steps of the method according to the fourth aspect.

[0023] In a sixteenth aspect, a wireless communication system is provided, comprising a terminal and a network-side device, wherein the terminal is configured to implement the steps of the method according to the first aspect, and the network-side device is configured to implement the steps of the method according to the second aspect; or the terminal is configured to implement the steps of the method according to the third aspect, and the network-side device is configured to implement the steps of the method according to the fourth aspect.

[0024] In a seventeenth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is configured to run programs or instructions to implement the steps of the method according to the first aspect, or implement the method according to the second aspect, or implement the method according to the third aspect, or implement the method according to the fourth aspect.

[0025] In an eighteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method according to the first aspect, or implement the method according to the second aspect, or implement the method according to the third aspect, or implement the method according to the fourth aspect.

[0026] In the embodiment of the present application, in the case that the terminal camps on the first RAT and the second RAT, the terminal receives first indication information from the network side device, the first indication information is used to instruct the terminal to perform a first operation on the second RAT; the terminal performs the first operation on the second RAT based on the first indication information; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; the first operation is a power saving related operation. Through the scheme, in the case of terminal dual camping, the power saving related operation can be performed on one of the camped cells. Therefore, the power consumption of the terminal in dual camping is reduced, the performance of the terminal in dual camping is improved, and the effect of the terminal registering and camping in the network of multiple modes is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Fig. 1 is a possible structure schematic diagram of a communication system related to the embodiments of the present application;

[0029] Fig. 2 is a schematic diagram of the architecture of a core network dual steering provided by the embodiments of the present application;

[0030] Fig. 3 is a flowchart of an MT service provided by the embodiments of the present application;

[0031] Fig. 4 is an example schematic diagram of one QoS flow mapping to one RAN node provided by the embodiments of the present application;

[0032] Fig. 5 is an example schematic diagram of one QoS flow mapping to two RAN nodes provided by the embodiments of the present application;

[0033] Fig. 6 is a flowchart of one of the RAT camping methods provided by the embodiments of the present application;

[0034] Fig. 7 is an example schematic diagram of TAU in the case of terminal dual camping provided by the embodiments of the present application;

[0035] Fig. 8 is an example schematic diagram of TAU in the case of terminal dual camping provided by the embodiments of the present application;

[0036] Fig. 9 is an example schematic diagram of TAU in the case of terminal dual camping provided by the embodiments of the present application;

[0037] FIG. 10 is an example diagram of aligning DRX cycles according to an embodiment of the present application;

[0038] FIG. 11 is a flowchart of a RAT camping method according to another embodiment of the present application;

[0039] FIG. 12 is an example diagram of aligning DRX cycles according to another embodiment of the present application;

[0040] FIG. 13 is a flowchart of a RAT camping method according to another embodiment of the present application;

[0041] FIG. 14 is a flowchart of a same-site cross-RAT cell handover method according to an embodiment of the present application;

[0042] FIG. 15 is a flowchart of a same-site cross-RAT cell handover method according to another embodiment of the present application;

[0043] FIG. 16 is a flowchart of a same-site cross-RAT cell handover method according to another embodiment of the present application;

[0044] FIG. 17 is a flowchart of a same-site cross-RAT cell handover method according to another embodiment of the present application;

[0045] FIG. 18 is a structural diagram of a RAT camping apparatus according to an embodiment of the present application;

[0046] FIG. 19 is a structural diagram of a RAT camping apparatus according to another embodiment of the present application;

[0047] FIG. 20 is a structural diagram of a same-site cross-RAT cell handover apparatus according to an embodiment of the present application;

[0048] FIG. 21 is a structural diagram of a same-site cross-RAT cell handover apparatus according to another embodiment of the present application;

[0049] FIG. 22 is a hardware structural diagram of a communication device according to an embodiment of the present application;

[0050] FIG. 23 is a hardware structural diagram of a terminal according to an embodiment of the present application;

[0051] FIG. 24 is a hardware structural diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0053] The terms "first", "second", and the like in the specification are used to distinguish between similar objects, and are not used to describe a particular sequential or chronological order. It is to be understood that such terms are used interchangeably, where appropriate, to refer to similar objects in order to illustrate embodiments of the present application by way of non-limiting example, and that the terms "first", "second", etc. are not intended to limit the number of objects to which the terms refer, e.g., the first object can be one or more. Furthermore, the term "or" as used in the specification is intended to mean at least one of the items connected by the term. For example, the phrase "A or B" means at least one of the following three cases: 1) A is included and B is not included; 2) B is included and A is not included; and 3) both A and B are included. In addition, the terms "A and / or B", "at least one of A and B", and "at least one of A or B" also mean at least one of the three cases described above. The character " / " is generally used to represent an "or" relationship between the associated objects before and after the character " / ".

[0054] The term "indicate" in the specification can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). The direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or requested results, etc. in the sent indication. The indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operations to be performed or the requested results, etc. according to the judgment result.

[0055] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0056] ​FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit / receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical terminology, provided that the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0057] The core network device can also be referred to as a core network node, a core network function, or a core network network element, etc., which includes but is not limited to at least one of the following: a mobility management entity (MME), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), a policy and charging rules function (PCRF), an edge application server discovery function (EASDF), a unified data management (UDM), a unified data repository (UDR), a home subscriber server (HSS), a centralized network configuration (CNC), a network repository function (NRF), a network exposure function (NEF), a local NEF (L-NEF), a binding support function (BSF), an application function (AF), a location management function (LMF), a gateway mobile location center (GMLC), a network data analytics function (NWDAF), etc. It should be noted that only the core network device in the NR system is taken as an example for introduction in the embodiments of the present application, and the specific type of the core network device is not limited. If the name of the core network device mentioned in the embodiments of the present application changes in the subsequent protocol version (for example, 6G), it is also within the protection scope of the present application.

[0058] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices together, and the embodiments of the present application do not make a specific limitation in this regard. It can be understood that the above function modules can be network elements in a hardware device, can be software function modules running on a dedicated hardware, or can be virtualized function modules instantiated on a platform (for example, a cloud platform).

[0059] The RAT camping method, the same-station cross-standard cell handover method, the device, the terminal, the network side equipment, the medium and the computer program product provided by the embodiments of the present application will be described in detail below in combination with the drawings and some embodiments and application scenarios.

[0060] The RAT camping method, the same-station cross-standard cell handover method, the device, the terminal, the network side equipment, the medium and the computer program product provided by the embodiments of the present application can be applied to the scenario of terminal registration camping in a multi-standard network, especially the scenario of terminal dual camping and terminal cross-standard cell handover.

[0061] At present, it is difficult to achieve full-network synchronous deployment when a new network standard starts to be deployed. Therefore, it is common to gradually start deployment for some capacity hotspots. For example, in some scenarios, 6G base stations (especially for new spectrum capacity layer) and 5G base stations cannot be co-located or centrally deployed, so mobility and service continuity can only be guaranteed through cell handover or Inter-Radio Access Technology (IRAT) Dual Connectivity (DC). It can be understood that DC is a dual-flow splitting solution of a control node on the Radio Access Network (RAN) side, and there is service interruption during cell handover, so the performance will be lost. Therefore, IRAT DC is mainly for Non-Standalone (NSA) scenarios. For Standalone (SA) scenarios, deployment is rare, and the main reason is that the inter-site coordination complexity is high and the performance is difficult to guarantee, and cross-vendor implementation is more difficult to achieve. Therefore, in the actual network, intra / inter-RAT coordination is mainly based on Carrier Aggregation (CA) and Dynamic Spectrum Sharing (DSS), and there is basically no DC deployment.

[0062] Thus, for the scenario that 6G cannot continuously cover in the early stage of deployment, a cross-site solution needs to be considered, which can fully use network spectrum resources and terminal dual-transmit dual-receive capability to improve capacity while solving coverage and mobility. Dual steering (dual stack) is to semi-statically coordinate or offload two RANs at a higher network node (such as 6G core network (6th generation core, 6GC) / user plane function (UPF)), reduce the coupling between two base stations, thereby helping operators to smoothly upgrade 6G on the existing 5G network, guarantee terminal performance, and better support the supply security of cross-vendor deployment.

[0063] A typical core network dual steering architecture is shown in FIG. 2, in which 6G and 5G base stations are connected to a unified 6G / 5G UPF / session management function (SMF), and the control plane is independently connected.

[0064] To support service dual connection, the terminal can register and camp in 5G and 6G cells at the same time, and two systems independently page; when the terminal initiates uplink (Mobile Original, MO) service, it can be initiated by two systems at the same time or according to the service attribute and signal quality to select one to initiate connection. For downlink (Mobile Terminated, MT) service, a typical MT service flow is shown in FIG. 3, in which two system RANs independently establish radio resource control (RRC) and non-access layer (NAS) connections, and then associate them when the user plane is established, and establish a DS bearer.

[0065] In the user plane, the UPF can select one Quality of Service flow (QoS flow) to be mapped to one RAN node, or select one QoS flow to be mapped to two RAN nodes, i.e., split the one QoS flow to be mapped to two RAN nodes. For example, as shown in FIG. 4, QoS flow A and QoS flow B are mapped to one RAN node of 6G, and QoS flow C is mapped to one RAN node of 5G, respectively; as shown in FIG. 5, QoS flow A and QoS flow B are mapped to the RAN node of 6G, and QoS flow C is mapped to one RAN node of 5G, respectively, wherein QoS flow A is mapped to one RAN node of 6G, and QoS flow B is mapped to two RAN nodes of 6G.

[0066] In addition, MRSS is a cross-standard dynamic spectrum technology. When upgrading the mobile network, operators in many countries and regions will consider upgrading on the original spectrum. On the one hand, it can save the cost of new frequency purchase and deployment, and on the other hand, it can reuse the existing network site and transmission to reduce the capital expenditure (CAPEX) and operating expense (OPEX). Dynamic spectrum sharing can adapt to the scenario that more and more users are gradually deployed in 6G, and dynamically adjust the resource sharing between 5G and 6G. For example, for a certain 5G deployment spectrum, taking 3.5G 100MHz bandwidth as an example. Through hardware updating and software upgrading, the same 100M spectrum can be shared by 5G and 6G cells. Terminals with different capabilities access cells of corresponding standards, and 100M resources are shared in time, frequency, and space dimensions in a semi-static or scheduling granularity.

[0067] The RAT camping method provided by the embodiments of the present application can reduce the power consumption of the terminal in the dual camping state, improve the performance of the terminal in the dual camping state, and improve the effect of the terminal in the multi-standard network registration and camping.

[0068] The same-site cross-standard cell switching method provided by the embodiments of the present application can perform MRSS cell switching based on the multi-standard co-site scenario, so that the air interface is not interrupted during the cell switching process, and only the parameters are updated. In this way, the user is not aware during the cell switching process, and the effect of the terminal in the multi-standard network registration and camping is improved.

[0069] The RAT camping method, the same-site cross-standards cell handover method, the device, the terminal, the network side equipment, the medium, and the computer program product provided by the embodiments of the present application will be described in detail below in combination with some embodiments and application scenarios thereof.

[0070] FIG. 6 shows a flowchart of a RAT camping method provided by an embodiment of the present application. As shown in FIG. 6, the RAT camping method can include the following steps 201 and 202.

[0071] In step 201, the terminal receives first indication information from a network side equipment in a case where the terminal camps on a first RAT and a second RAT, and the first indication information is used to instruct the terminal to perform a first operation on the second RAT.

[0072] The network side equipment can be a core network equipment or an access network equipment corresponding to the first RAT, or the network side equipment can be a core network equipment or an access network equipment corresponding to the second RAT; and the first operation is a power saving related operation.

[0073] In step 202, the terminal performs the first operation on the second RAT based on the first indication information.

[0074] In some embodiments of the present application, the first RAT and the second RAT can be RATs corresponding to different network standards.

[0075] In some embodiments of the present application, in a case where the terminal is in an area covered by multiple standards networks at the same time, the terminal can independently initiate registration and camping under the multiple standards networks.

[0076] For example, assuming that the terminal is in an area covered by 5G and 6G at the same time, the terminal can independently initiate registration and camping under 5G and 6G respectively, so that the terminal can camp on the RAT of 5G and the RAT of 6G at the same time.

[0077] It can be understood that although the terminal can usually camp on two RAT cells in a dual registration manner, so as to minimize the coupling of the radio access networks (RANs) corresponding to the two RAT cells, thereby avoiding the generation of inter-RAN interference. However, in the case of dual camping of the terminal, both receivers of the terminal need to be kept in monitoring to perform normal data transmission. Thus, it can cause large power consumption when the terminal dual camps.

[0078] In some embodiments of the present application, the terminal can define a primary registration RAT (i.e., the first RAT) among the first RAT and the second RAT, so that the other RAT (i.e., the second RAT) can camp in a power saving mode according to the indication of the network side equipment.

[0079] In some embodiments of the present application, the first operation described above is an operation that can reduce the power consumption of the terminal in the second RAT.

[0080] In some embodiments of the present application, in the case where the terminal camps on the first RAT and the second RAT, the network side device can instruct the terminal to perform the first operation in one of the first RAT and the second RAT when sending the first indication information to the terminal.

[0081] Exemplarily, the core network device or the access network device corresponding to the first RAT can instruct the terminal to perform the first operation in the first RAT, or can instruct the terminal to perform the first operation in the second RAT.

[0082] Exemplarily, the core network device or the access network device corresponding to the second RAT can instruct the terminal to perform the first operation in the first RAT, or can instruct the terminal to perform the first operation in the second RAT.

[0083] The RAT camping method provided by the embodiments of the present application can reduce the power consumption of the terminal in the case of dual camping of the terminal, improve the performance of the terminal in the case of dual camping of the terminal, and improve the way of registering and camping of the terminal in the network of multiple modes.

[0084] In some embodiments of the present application, the step 202 can include at least one of the following: step 202a, step 202b.

[0085] Step 202a, the terminal determines a first discontinuous reception (DRX) cycle as a paging cycle of the second RAT.

[0086] The first DRX cycle is greater than a DRX cycle of the first RAT, and the terminal is in an idle state or an inactive state under the second RAT.

[0087] In some embodiments of the present application, after receiving the first indication information instructing the terminal to perform the power saving related operation in the second RAT, the terminal can calculate the DRX cycle of the terminal in the idle state or the inactive state under the first RAT using a normal paging cycle. Then, the terminal can use the first DRX cycle with a longer DRX cycle as the paging cycle of the second RAT for paging.

[0088] It can be understood that the terminal determines the first DRX cycle as the paging cycle of the second RAT, which can mean that the terminal enters a low power wake up signal (LPWUS) or similar state in the second RAT to reduce the power consumption of the terminal in the second RAT.

[0089] Step 202b, the terminal determines the first tracking area update (TAU) period as the TAU period of the second RAT.

[0090] Wherein, the first TAU period is greater than the TAU period of the first RAT.

[0091] In some embodiments of the present application, after receiving the first indication information indicating that the terminal performs power saving related operations in the second RAT, the terminal can use a normal TAU period in the first RAT, and use the first TAU period with a longer period in the second RAT for tracking area update, so as to reduce the power consumption of the terminal in the second RAT.

[0092] For example, the network side device indicates the terminal to camp on a 6G RAT cell as the main registration RAT, and to camp on a 5G RAT cell for power saving. The terminal can calculate the DRX period of the 6G RAT cell using a normal paging period, while camping on the 5G RAT cell directly enters the LPWUS or similar state, and uses a longer DRX period and TAU period in the 5G RAT cell.

[0093] In some embodiments of the present application, the first DRX period and the first TAU period can be configured by the network side device, or can be agreed by the terminal and the network side device. The embodiments of the present application do not make specific limitations.

[0094] In this way, the power consumption of the terminal in the second RAT can be reduced by entering the idle state or the inactive state, using a longer DRX period, or using a longer TAU period in the second RAT.

[0095] In some embodiments of the present application, the RAT camping method provided by the embodiments of the present application can further include the following step 203.

[0096] Step 203, when the terminal performs connection establishment in the first RAT, the terminal determines to enter the connected state in the second RAT according to at least one of the service policy and the network configuration.

[0097] In some embodiments of the present application, when the terminal performs uplink mobile original (MO) or downlink mobile terminated (MT) service in the first RAT, the terminal can trigger the terminal to perform connection establishment in the first RAT, so that the terminal can determine to enter the connected state in the second RAT according to at least one of the service policy and the network configuration.

[0098] In some embodiments of the present application, the service policy can include at least one of: a Quality of Service (QoS) requirement of the service, an Internet Protocol (IP) address of the service.

[0099] In some embodiments of the present application, different services can correspond to different QoS requirements. It can be understood that the terminal can determine to enter the connected state in the second RAT when the service corresponds to a QoS requirement that the terminal is in the connected state in the second RAT or the QoS requirement is high.

[0100] In some embodiments of the present application, different services can correspond to different IP addresses. It can be understood that the terminal can determine to enter the connected state in the second RAT when the indication information associated with the IP address indicates that the terminal is in the connected state in the second RAT.

[0101] In some embodiments of the present application, the network configuration can include at least one of: a signal quality threshold value, a power threshold value of the terminal, second indication information.

[0102] The second indication information can be used to indicate whether the terminal enters the connected state in the second RAT when performing connection establishment in the first RAT.

[0103] In some embodiments of the present application, the signal quality threshold value can be used to indicate a threshold value of the signal quality of the terminal when performing connection establishment in the first RAT.

[0104] For example, the terminal can determine to enter the connected state in the second RAT when the signal quality of the terminal when performing connection establishment in the first RAT is less than or equal to the signal quality threshold value.

[0105] In some embodiments of the present application, the power threshold value of the terminal can indicate a threshold value of the power of the terminal when performing connection establishment in the first RAT.

[0106] For example, the terminal can determine to enter the connected state in the second RAT when the power of the terminal when performing connection establishment in the first RAT is greater than the power threshold value of the terminal.

[0107] In some embodiments of the present application, the network side device configures a bit for the terminal, and the bit contains the second indication information to indicate whether the terminal enters the connected state in the second RAT when performing connection establishment in the first RAT.

[0108] Thus, when the terminal performs connection establishment in the first RAT, the terminal determines to enter the connected state in the second RAT according to at least one of the service policy and the network configuration. Therefore, the abnormal situation such as paging miss in the second RAT can be avoided while reducing the power consumption of the terminal in the second RAT as much as possible.

[0109] In some embodiments of the present application, after step 202, the RAT camping method provided by the embodiments of the present application can further include the following step 204, step 205 or step 206.

[0110] In step 204, the terminal sends a first TAU message to the core network device corresponding to the first RAT when a tracking area identity (TAI) corresponding to the first RAT changes or a TAU timer of the first RAT expires.

[0111] The first TAU message can include a second TAU message, which can be used to indicate updating of a location-related parameter of the terminal in the core network device corresponding to the second RAT.

[0112] In some embodiments of the present application, when the terminal leaves the coverage of the first RAT, the TAI corresponding to the first RAT changes, so that the terminal can trigger cell migration of the first RAT corresponding to the first cell through TAU.

[0113] In some embodiments of the present application, the timing duration of the TAU timer can be set according to the TAU period of the terminal in the first RAT. When the TAU timer of the first RAT expires, it means that one TAU period of the first RAT has elapsed, and the terminal needs to perform location update through TAU.

[0114] In some embodiments of the present application, in order to reduce the activity of the terminal in the second RAT, the terminal can carry a second TAU message for indicating updating of a location-related parameter of the terminal in the core network device corresponding to the second RAT in a container in a first TAU message and send the first TAU message to the core network device corresponding to the first RAT when a tracking area identity (TAI) corresponding to the first RAT changes or a TAU timer of the first RAT expires. Thus, the core network device corresponding to the first RAT can send the second TAU message to the core network device corresponding to the second RAT. In other words, the NAS TAU of the first RAT can be carried to the core network device of the second RAT through at least one of the first RAT air interface and the first TAU message.

[0115] In some embodiments of the present application, the core network device corresponding to the first RAT can generate a first update message based on the second TAU message, and send the first update message to the core network device corresponding to the second RAT, to instruct the core network device corresponding to the second RAT to update the location-related parameters of the terminal.

[0116] For example, as shown in FIG. 7, taking the terminal performing power saving related operations in the 6G RAT as an example. The terminal can send a first TAU message carrying a second TAU message through a container to the core network device corresponding to the 5G RAT in the case that the TAI corresponding to the 5G RAT changes or the TAU timer of the 5G RAT expires. Thus, the core network device corresponding to the 5G RAT can send the second TAU message to the core network device corresponding to the 6G RAT after receiving the first TAU message. It can be understood that the core network device corresponding to the 6G RAT can return a TAU confirmation message to the core network device corresponding to the 5G RAT, and the core network device corresponding to the 5G RAT can return the TAU confirmation messages of the 5G RAT and the 6G RAT to the terminal to inform the terminal that the location update has been completed.

[0117] Step 205: The terminal sends a first TAU message to the core network device corresponding to the first RAT in the case that the TAI corresponding to the first RAT changes or the TAU timer of the first RAT expires, and performs measurement and cell reselection on the second RAT, and sends a second TAU message to the core network device corresponding to the second RAT.

[0118] In some embodiments of the present application, in the case that the TAI corresponding to the first RAT changes or the TAU timer of the first RAT expires, the terminal can trigger the TAU of the second RAT at the same time when the terminal performs the TAU of the first RAT through the joint TAU. That is, the TAU of the second RAT is triggered by the TAU process of the first RAT.

[0119] In some embodiments of the present application, when the terminal sends the first TAU message to the core network device corresponding to the first RAT, the terminal can also perform measurement and cell reselection on the second RAT, and send the second TAU message to the core network device corresponding to the second RAT through the cell after reselection.

[0120] Exemplarily, as shown in FIG. 8, taking the terminal performing power saving related operations in the 6G RAT as an example. The terminal can send a first TAU message to the core network device corresponding to the 5G RAT in the case that the TAI corresponding to the 5G RAT changes or the TAU timer of the 5G RAT expires, and perform measurement and cell reselection on the 6G RAT, and send a second TAU message to the core network device corresponding to the 6G RAT. Thus, the core network device corresponding to the 5G RAT and the core network device corresponding to the 6G RAT can respectively return a TAU confirmation message to the terminal after receiving the TAU message, to inform the terminal that the location update has been completed.

[0121] In step 206, the terminal sends a first TAU message to the core network device corresponding to the first RAT in the case that the TAI corresponding to the first RAT changes or the TAU timer of the first RAT expires.

[0122] The first TAU message is used to trigger the update of the location related parameters of the terminal in the core network device corresponding to the second RAT.

[0123] In some embodiments of the present application, since the terminal moves, the terminal can only trigger the TAU of the first RAT in the case that the TAI corresponding to the first RAT changes or the TAU timer of the first RAT expires, and the core network device corresponding to the first RAT informs the core network device corresponding to the second RAT to perform the update of the location related parameters of the terminal.

[0124] Exemplarily, as shown in FIG. 9, taking the terminal performing power saving related operations in the 6G RAT as an example. The terminal can send a first TAU message to the core network device corresponding to the 5G RAT in the case that the TAI corresponding to the 5G RAT changes or the TAU timer of the 5G RAT expires. Thus, the core network device corresponding to the 5G RAT can send the TAU message of the terminal to the core network device corresponding to the 6G RAT after receiving the first TAU message. It can be understood that the core network device corresponding to the 6G RAT can return a TAU confirmation message to the core network device corresponding to the 5G RAT, and the core network device corresponding to the 5G RAT can return a TAU confirmation message of the 5G RAT to the terminal, to inform the terminal that the location update has been completed.

[0125] It can be understood that since the terminal only triggers the TAU process of the first RAT, the terminal is not aware of the process of the core network device corresponding to the 6G RAT performing the update of the location related parameters of the terminal.

[0126] Thus, the position related parameter update of the terminal in the first RAT and the second RAT can be completed simultaneously through the joint TAU triggered by the first RAT, so that the position update is completed in time without the terminal receiving or sending in the second RAT as much as possible, the power consumption of the terminal in dual camping is reduced, the performance of the terminal in dual camping is improved, and the registration and camping manner of the terminal in the network of multiple modes is improved.

[0127] In some embodiments of the present application, after step 202, the RAT camping method provided by the embodiments of the present application can further include step 207 as follows.

[0128] Step 207: During the process of performing the air interface signal quality measurement of the first cell corresponding to the first RAT by the terminal, the terminal performs a second operation.

[0129] The second operation can include at least one of the following: searching for the second cell corresponding to the second RAT, synchronizing the second cell, measuring the second cell, and acquiring information of the second cell.

[0130] In some embodiments of the present application, the information of the second cell can include at least one of the following: a master information block (MIB) and a system information block (SIB).

[0131] In some embodiments of the present application, when the terminal performs the measurement of the first cell corresponding to the first RAT, the terminal can perform the second operation by using the current receiver or starting the second receiver.

[0132] Thus, the terminal does not need to perform the operations such as searching for the second cell corresponding to the second RAT, synchronizing the second cell, measuring the second cell, and acquiring information of the second cell, thereby reducing the power consumption of the terminal in dual camping.

[0133] In some embodiments of the present application, after step 201, the RAT camping method provided by the embodiments of the present application can further include step 208 as follows.

[0134] Step 208: When the terminal receives a paging message from the core network device corresponding to the first RAT, the terminal initiates an RRC connection establishment procedure to the access network device corresponding to the first RAT in response to the paging message, and initiates an RRC connection establishment procedure to the access network device corresponding to the second RAT according to at least one of the network configuration and the service policy.

[0135] In some embodiments of the present application, the core network device corresponding to the RAT can prioritize paging the terminal in the RAT that does not perform power saving operation when performing MT service, and can page the terminal in the RAT that performs power saving operation if the terminal cannot be paged in the first time period. That is, the core network device corresponding to the first RAT can prioritize paging the terminal in the first RAT, and can send indication information to the core network device corresponding to the second RAT to instruct the core network device corresponding to the second RAT to page the terminal in the second RAT if the terminal cannot be paged in the first time period. In this way, the efficiency and success rate of paging can be considered.

[0136] In some embodiments of the present application, the first time period can be configured by the network side device. The embodiments of the present application are not limited in this regard.

[0137] In some embodiments of the present application, since the terminal resides in the first RAT and the second RAT, the terminal can establish RRC connections with the core network device corresponding to the first RAT and the core network device corresponding to the second RAT, respectively, to complete transmission of service corresponding data.

[0138] In some embodiments of the present application, in the case that the terminal receives a paging message from the core network device corresponding to the first RAT, the terminal can initiate an RRC connection establishment procedure to the access network device corresponding to the first RAT in response to the paging message. In addition, the terminal can also initiate an RRC connection establishment procedure to the access network device corresponding to the second RAT according to the MO procedure.

[0139] It can be understood that before the terminal initiates the RRC connection establishment procedure to the access network device corresponding to the second RAT, the terminal can perform measurement and cell reselection of the second RAT to reside in a suitable cell corresponding to the second RAT, and then initiate the RRC connection establishment procedure.

[0140] In some embodiments of the present application, the paging message contains first identification information and second identification information, the first identification information is used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the first RAT, and the second identification information is used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the second RAT.

[0141] It can be understood that the terminal can consider that the paging message is two pages based on the first identification information and the second identification information in the paging message, and therefore the terminal can establish two RRC connections to respond to the paging message.

[0142] In this way, the terminal can respond to the paging message by establishing two RRC connections when residing in the first RAT and the second RAT, which improves the performance of the terminal after responding to the paging and improves the effect of the terminal registering and residing in multiple mode networks.

[0143] In some embodiments of the present application, after step 202, the RAT camping method provided by the embodiments of the present application can further include step 209 or step 210 as follows.

[0144] Step 209, in the case that the terminal is in the DRX mode, the terminal sends third indication information to the core network device or the access network device corresponding to the first RAT.

[0145] The third indication information can include at least one of the following: a DRX cycle of the terminal in the second RAT, a first system frame number (SFN) time difference, a second DRX cycle.

[0146] In some embodiments of the present application, the third indication information can be used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT.

[0147] It should be noted that the third indication information can be used to align the DRX cycle of the terminal in the first state in the first RAT and the DRX cycle of the terminal in the second state in the second RAT. The first state can include but is not limited to: connected state, idle state, inactive state; the second state can include but is not limited to: connected state, idle state, inactive state. That is, the third indication information can be used to align the DRX cycle of the terminal in any state in the first RAT and the DRX cycle of the terminal in any state in the second RAT.

[0148] For example, the third indication information can be used to align the DRX cycle of the terminal in the idle state in the first RAT and the DRX cycle of the terminal in the idle state in the second RAT, or the DRX cycle of the terminal in the inactive state in the first RAT and the DRX cycle of the terminal in the inactive state in the second RAT, or the DRX cycle of the terminal in the idle state in the first RAT and the DRX cycle of the terminal in the inactive state in the second RAT, or the DRX cycle of the terminal in the inactive state in the first RAT and the DRX cycle of the terminal in the idle state in the second RAT.

[0149] In some embodiments of the present application, the first SFN time difference is the SFN time difference of the cell corresponding to the first RAT and the cell corresponding to the second RAT. It can be understood that the cell corresponding to the first RAT can be the cell in which the terminal camps in the first RAT, and the cell corresponding to the second RAT can be the cell in which the terminal camps in the second RAT.

[0150] In some embodiments of the present application, the second DRX cycle described above can be a preferred DRX cycle, and the second DRX cycle can also be understood as a preferred DRX cycle of the terminal.

[0151] It can be understood that, after receiving the third indication information, the core network device or the access network device corresponding to the first RAT can set the DRX cycle corresponding to the first RAT based on the DRX cycle contained in the third indication information. In the case where the first SFN time difference is contained in the third indication information, the core network device or the access network device corresponding to the first RAT can more accurately set the DRX cycle corresponding to the first RAT according to the SFN time difference between the cell corresponding to the first RAT and the cell corresponding to the second RAT, so as to align with the DRX cycle contained in the third indication information.

[0152] In some embodiments of the present application, in the case where the terminal has DS dual connectivity capability or the terminal has DS dual camped, the terminal can inform the core network device corresponding to the RAT to coordinate the two RATs in which the terminal camps through terminal NAS or RAN Ng message; or the terminal can also inform the core network device corresponding to the RAT to coordinate the two RATs in which the terminal camps through an air interface RRC message one DRX cycle, so as to align the DRX cycles of the terminal in the two RATs. It can be understood that, after the DRX cycle coordination is completed when the terminal is in the connected state, the coordinated DRX cycle can be applied to the DRX cycle after the terminal enters the idle state or the inactive state again.

[0153] In some embodiments of the present application, the terminal can send the DRX cycle of the second RAT to the core network device or the access network device corresponding to the first RAT, so that the core network device corresponding to the first RAT can set the DRX cycle of the first RAT based on the DRX cycle of the second RAT, so as to align the DRX cycle of the terminal in the idle state under the first RAT and the second RAT, or align the DRX cycle of the terminal in the inactive state under the first RAT and the second RAT, or align the DRX cycle of the terminal in the connected state under the first RAT and the second RAT.

[0154] In some embodiments of the present application, the terminal can also send the DRX cycle of the first RAT to the core network device or the access network device corresponding to the second RAT, so that the core network device corresponding to the second RAT can set the DRX cycle of the second RAT based on the DRX cycle of the first RAT, so as to align the DRX cycle of the terminal in the idle state under the first RAT and the second RAT, or align the DRX cycle of the terminal in the inactive state under the first RAT and the second RAT, or align the DRX cycle of the terminal in the connected state under the first RAT and the second RAT.

[0155] In some embodiments of the present application, when the core network device corresponding to the RAT needs to align the DRX cycles of the first RAT and the second RAT, the cells corresponding to the two RATs need to be synchronized or the SFN difference needs to be calibrated. Therefore, the terminal also needs to report the SFN time difference of the first RAT camped cell and the second RAT camped cell, so that the core network device corresponding to the RAT can align the configurations of the DRX of the first RAT and the DRX of the second RAT.

[0156] Exemplarily, as shown in FIG. 10, taking the second DRX cycle as the preferred DRX cycle as an example. When the terminal is in the idle state or the inactive state, if the terminal is in the DRX state and dual-connected, the terminal can send the preferred DRX parameter and the RDX parameter configured by the 6G and the SFN time difference to the core network device corresponding to the 5G RAT, so that the core network device corresponding to the 5G RAT can coordinate the DRX cycle of the 5G RAT based on the preferred DRX parameter and the RDX parameter configured by the 6G and the SFN time difference, and send the coordinated DRX parameter configuration to the terminal.

[0157] In this way, since the terminal can instruct the core network device corresponding to the RAT to align at least one of the DRX cycle of the terminal in the idle state under the first RAT and the second RAT, and the DRX cycle of the terminal in the inactive state under the first RAT and the second RAT. Therefore, after alignment, the terminal can multiplex repeated reception in the DRX cycle to save power consumption when the terminal is dual-camped.

[0158] Step 210, in the case that the terminal is in the DRX mode, the terminal sends fourth indication information to the core network device or the access network device corresponding to the second RAT.

[0159] The fourth indication information can include at least one of the following: the DRX cycle of the terminal in the first RAT, the first SFN time difference, and the second DRX cycle.

[0160] In some embodiments of the present application, the fourth indication information can be used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT.

[0161] The description of the above step 210 can be referred to the detailed description of step 209. To avoid repetition, it will not be described here.

[0162] In this way, since the terminal can instruct the core network device corresponding to the RAT to align at least one of the DRX cycle of the terminal in the idle state under the first RAT and the second RAT, and the DRX cycle of the terminal in the inactive state under the first RAT and the second RAT. Therefore, after alignment, the terminal can multiplex repeated reception in the DRX cycle to save power consumption when the terminal is dual-camped.

[0163] FIG. 11 shows a flow diagram of a RAT camping method provided by the embodiments of the present application. As shown in FIG. 11, the RAT camping method can include the following step 301.

[0164] In step 301, the network side device sends first indication information to the terminal, where the first indication information is used to instruct the terminal to perform a first operation on the second RAT, in the case that the terminal camps on the first RAT and the second RAT.

[0165] The network side device can be a core network device or an access network device corresponding to the first RAT, or the network side device can be a core network device or an access network device corresponding to the second RAT; and the first operation is a power saving related operation.

[0166] The RAT camping method provided by the embodiments of the present application can perform a power saving related operation on one of the cells camped by the terminal in the case of dual camping. Therefore, the power consumption of the terminal in the case of dual camping is reduced, the performance of the terminal in the case of dual camping is improved, and the effect of the terminal registering and camping on networks of multiple modes is improved.

[0167] In some embodiments of the present application, in the case that the network side device is a core network device corresponding to the first RAT, the RAT camping method provided by the embodiments of the present application can further include the following step 302.

[0168] In step 302, the network side device receives a first TAU message from the terminal, updates the location related parameters of the first RAT, and sends a second TAU message or a first update message to a core network device corresponding to the second RAT.

[0169] The first TAU message includes the second TAU message, and the first update message is generated based on the first TAU message.

[0170] In this way, the location related parameter update of the terminal in the first RAT and the second RAT is completed simultaneously through the joint TAU triggered by the TAU of the first RAT, so that the location update is completed in time without the terminal being active in the second RAT as much as possible, the power consumption of the terminal in the case of dual camping is reduced, the performance of the terminal in the case of dual camping is improved, and the registration and camping mode of the terminal on networks of multiple modes is improved.

[0171] In some embodiments of the present application, in the case that the network side device is a core network device corresponding to the second RAT, the RAT camping method provided by the embodiments of the present application can further include the following step 303.

[0172] Step 303, the network side device receives a second TAU message or a first update message from the core network device corresponding to the first RAT, and updates the location related parameters of the second RAT.

[0173] In this way, the location related parameter update of the terminal in the first RAT and the second RAT can be completed simultaneously through the joint TAU triggered by the first RAT, so that the location update is completed in time without the terminal being active in the second RAT as much as possible, the power consumption of the terminal in dual camping is reduced, the performance of the terminal in dual camping is improved, and the registration and camping of the terminal in the network of multiple modes is improved.

[0174] In some embodiments of the present application, in the case that the network side device is the core network device corresponding to the first RAT, the RAT camping method provided by the embodiments of the present application can further include the following steps 304 and 305.

[0175] Step 304, the network side device sends a paging message to the terminal.

[0176] Step 305, in the case that the network side device does not receive a response message of the terminal within a first time period, the network side device sends fifth indication information to the core network device or the access network device corresponding to the second RAT.

[0177] The fifth indication information can be used to instruct the core network device or the access network device corresponding to the second RAT to page the terminal.

[0178] In some embodiments of the present application, in the case that the network side device is the core network or the access network device corresponding to the second RAT, the RAT camping method provided by the embodiments of the present application can further include the following steps 306 and 307.

[0179] Step 306, the network side device receives fifth indication information from the core network or the access network device corresponding to the first RAT.

[0180] The fifth indication information is used to instruct to page the terminal.

[0181] Step 307, the network side device sends a paging message to the terminal.

[0182] In this way, the terminal can respond to the paging message by establishing two RRC connections in the case of camping in the first RAT and the second RAT, thereby improving the performance of the terminal after responding to the paging and improving the effect of the terminal in the network of multiple modes.

[0183] In some embodiments of the present application, in the case that the network side device is a core network device or an access network device corresponding to the first RAT, the RAT camping method provided by the embodiments of the present application can further include the following steps 308 and 309.

[0184] Step 308, the network side device receives third indication information from the terminal.

[0185] The third indication information can include at least one of the following: a DRX cycle of the terminal in the second RAT, a first SFN time difference, and a second DRX cycle.

[0186] In some embodiments of the present application, the third indication information can be used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT.

[0187] In some embodiments of the present application, the first SFN time difference can be an SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT.

[0188] Step 309, the network side device sets a DRX cycle of the terminal in the first RAT based on the third indication information.

[0189] In some embodiments of the present application, in the case that the network side device is a core network device or an access network device corresponding to the second RAT, the RAT camping method provided by the embodiments of the present application can further include the following steps 310 and 311.

[0190] Step 310, the network side device receives fourth indication information from the terminal.

[0191] The fourth indication information can include at least one of the following: a DRX cycle of the terminal in the first RAT, a first SFN time difference, and a second DRX cycle.

[0192] In some embodiments of the present application, the fourth indication information can be used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT.

[0193] Step 311, the network side device sets a DRX cycle of the terminal in the second RAT based on the fourth indication information.

[0194] Thus, since the terminal can instruct the core network device corresponding to the RAT to align at least one of the DRX cycle of the terminal in the idle state in the first RAT and the second RAT and the DRX cycle of the terminal in the inactive state in the first RAT and the second RAT, after the alignment, the terminal can multiplex repeated reception in the DRX cycle to save power consumption when the terminal is dual-camped.

[0195] In some embodiments of the present application, in the case that the network side device is a core network device or an access network device corresponding to the first RAT, the RAT camping method provided by the embodiments of the present application can further include the following steps 312 and 313.

[0196] Step 312, the network side device sends sixth indication information to the core network or the access network device corresponding to the second RAT.

[0197] The sixth indication information can include at least one of the following: the DRX cycle of the terminal in the first RAT, the SFN of the cell corresponding to the first RAT.

[0198] Step 313, the network side device sets the DRX cycle of the terminal in the second RAT based on the sixth indication information.

[0199] In some embodiments of the present application, in the case that the terminal camps on the first RAT and the second RAT, the core network device or the access network device corresponding to the first RAT can send the DRX cycle of the first RAT and the SFN of the first RAT to the core network device or the access network device corresponding to the second RAT, so that the core network device or the access network device corresponding to the second RAT can set the DRX cycle of the second RAT based on the DRX cycle of the first RAT and the SFN of the first RAT; or the core network device or the access network device corresponding to the second RAT can send the DRX cycle of the second RAT and the SFN of the second RAT to the core network device or the access network device corresponding to the first RAT, so that the core network device or the access network device corresponding to the first RAT can set the DRX cycle of the first RAT based on the DRX cycle of the second RAT and the SFN of the second RAT.

[0200] For example, as shown in FIG. 12, the general 5G core network (5th generation core, 5GC) and the general 6G core network (5th generation core, 6GC) can exchange and forward the DRX cycle of the respective RAT, so that the core network corresponding to the RAT can set and coordinate the DRX cycle of its RAT according to the received DRX cycle, to align at least one of the DRX cycle of the terminal in the idle state under the first RAT and the second RAT, and the DRX cycle of the terminal in the inactive state under the first RAT and the second RAT.

[0201] Thus, the terminal can instruct the core network device corresponding to the RAT to align at least one of the DRX cycle when the terminal is in the idle state under the first RAT and the second RAT, and the DRX cycle when the terminal is in the inactive state under the first RAT and the second RAT. Therefore, after the alignment, the terminal can multiplex repeated reception in the DRX cycle to save power consumption when the terminal is dual-registered.

[0202] In some embodiments of the present application, in the case where the network side device is the core network or the access network device corresponding to the second RAT, the RAT registration method provided by the embodiments of the present application can further include the following steps 314 and 315.

[0203] Step 314, the network side device sends seventh indication information to the core network or the access network device corresponding to the first RAT.

[0204] The seventh indication information can include at least one of the DRX cycle of the terminal under the second RAT, and the SFN of the cell corresponding to the second RAT.

[0205] Step 315, the network side device sets the DRX cycle of the terminal under the first RAT based on the seventh indication information.

[0206] It should be noted that the description of the above steps 314 and 315 can be referred to the description of the steps 312 and 313. To avoid repetition, it will not be described here.

[0207] It should be noted that other descriptions of the above steps 301 to 315 can be referred to the related description of the steps 201 to 210. To avoid repetition, it will not be described here.

[0208] Thus, the terminal can instruct the core network device corresponding to the RAT to align at least one of the DRX cycle when the terminal is in the idle state under the first RAT and the second RAT, and the DRX cycle when the terminal is in the inactive state under the first RAT and the second RAT. Therefore, after the alignment, the terminal can multiplex repeated reception in the DRX cycle to save power consumption when the terminal is dual-registered.

[0209] FIG. 13 shows a flowchart of a RAT registration method provided by an embodiment of the present application. As shown in FIG. 13, the RAT registration method can include the following steps 401 to 403.

[0210] Step 401, in the case where the terminal is registered in the first RAT and the second RAT, the network side device sends first indication information to the terminal, and the first indication information is used to instruct the terminal to perform a first operation under the second RAT.

[0211] Step 402, the terminal receives first indication information from a network side device.

[0212] Step 403, the terminal performs a first operation on the second RAT based on the first indication information.

[0213] The network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT.

[0214] The RAT camping method provided in the embodiments of the present application can perform power saving related operations on one of the cells in which the terminal camps in the case of dual camping of the terminal. Therefore, the power consumption of the terminal in the case of dual camping of the terminal is reduced, the performance of the terminal in the case of dual camping of the terminal is improved, and the effect of the terminal registering and camping in networks of multiple modes is improved.

[0215] FIG. 14 shows a flowchart of a same-site cross-mode cell handover method provided in the embodiments of the present application. As shown in FIG. 14, the same-site cross-mode cell handover method can include steps 501 and 502.

[0216] Step 501, in the process of data transmission of the terminal through the first RAT, the terminal receives a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT.

[0217] The first message can be used to indicate that the MRSS cell handover is performed.

[0218] In some embodiments of the present application, in the process of data transmission of the terminal through the first RAT, the access network device corresponding to the first RAT can make a decision to perform Inter-Radio Access Technology Handover (IRAT HO) between different RATs according to the terminal's location information, moving speed, measurement result, service attribute, and the like. That is, the terminal needs to perform the MRSS cell handover.

[0219] In some embodiments of the present application, the access network device corresponding to the first RAT can trigger the terminal to perform the MRSS cell handover through the air interface after completing the handover preparation in coordination with the core network device.

[0220] In some embodiments of the present application, in the process of the terminal performing the MRSS cell handover, the access network device corresponding to the first RAT can further trigger a Security Mode Command (SMC) process through the air interface to further optimize the user plane.

[0221] Step 502, the terminal switches to a second cell corresponding to the second RAT based on the first message, and updates a first parameter of the terminal.

[0222] The first parameter can include at least one of a context parameter and a security parameter.

[0223] In some embodiments of the present application, the access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

[0224] It can be understood that, when the access network device corresponding to the first RAT performs switching preparation through the interface of the access network device corresponding to the different RAT, since the cell to be switched is the MRSS cell in the same station as the current cell, the hybrid automatic repeat request (HARQ) can be kept from restarting, or the radio link control (RLC) can be kept from being reestablished in the switching process, so that the air interface can be kept from being interrupted. In this way, the terminal can not appear abnormal conditions such as freezing during the MRSS cell switching process.

[0225] In some embodiments of the present application, the context parameter can include necessary information for data transmission before and after the terminal switching.

[0226] It can be understood that, updating the context parameter of the terminal can keep the continuity of the service during the MRSS cell switching process of the terminal.

[0227] In some embodiments of the present application, the security parameter can include but is not limited to a hardware security capability parameter, an operating system security capability parameter, a communication connection security capability parameter, and a personal information security protection capability.

[0228] In some embodiments of the present application, during the switching of the terminal to the second cell corresponding to the second RAT, the new and old security parameters can be used in parallel to realize service interruption, so as to improve the performance during the MRSS cell switching process of the terminal.

[0229] The method for inter-mode cell switching in the same station provided by the embodiments of the present application can perform MRSS cell switching based on the multi-mode co-station scenario, so that the air interface can be kept from being interrupted during the cell switching process, and only the parameter can be updated. In this way, the user can not be aware of the cell switching process, and the effect of the terminal registering and camping in the network of multiple modes is improved.

[0230] In some embodiments of the present application, the first message can be a switching message or a mobile update message.

[0231] In some embodiments of the present application, the first message includes a data packet serial number (SN), and the SN is a SN of a first data packet processed by the access network device corresponding to the second RAT using the downlink encryption and integrity protection algorithm corresponding to the second cell after the terminal switches to the second cell.

[0232] In some embodiments of the present application, the handover message can instruct the terminal to perform the MRSS cell handover.

[0233] In some embodiments of the present application, the mobility update message can be used to instruct the terminal to update the RAT.

[0234] In some embodiments of the present application, the data packet can include a data packet for encryption and decryption and integrity protection (hereinafter referred to as integrity protection).

[0235] Exemplarily, the data packet can be a packet data convergence protocol (PDCP) data packet.

[0236] It can be understood that after the access network device corresponding to the second RAT sends the SN of the first data packet processed using the downlink encryption and integrity protection algorithm corresponding to the second cell to the terminal, the terminal can confirm that the MRSS cell handover has started from the SN. Therefore, the terminal can perform encryption and decryption and integrity protection processing on the data packets with SNs after the SN in parallel using new and old parameters or new and old algorithms until the MRSS cell handover is completed.

[0237] It can be understood that when the first message is received, the data packet submitted to the RLC by the original user plane can still continue to be transmitted, and the terminal can still perform decryption and integrity protection processing according to the parameters before the handover after receiving the data packet.

[0238] It should be noted that the access network device corresponding to the second RAT and the access network device corresponding to the first RAT can be the same access network device.

[0239] Therefore, since the access network device can send the SN of the first data packet processed using the downlink encryption and integrity protection algorithm corresponding to the second cell to the terminal, the terminal can timely use the starting data packet of the cell handover, so that the corresponding processing can be performed in time, and the situation of freezing or parsing failure can be avoided.

[0240] In some embodiments of the present application, after step 502, the method for performing the inter-site cross-mode cell handover provided by the embodiments of the present application can further include the following step 503.

[0241] Step 503, the terminal performs at least one of decryption processing and integrity protection verification processing on the data from the access network device corresponding to the second RAT based on the updated first parameter.

[0242] In some embodiments of the present application, the updated first parameter can be carried by the first message to the terminal, so that the terminal can perform at least one of decryption processing and integrity protection verification processing on the data from the access network device corresponding to the second RAT based on the updated first parameter.

[0243] It can be understood that through the integrity detection processing, the terminal can determine whether the received data is complete to avoid the occurrence of data loss.

[0244] In some embodiments of the present application, after the step 502, the method for inter-site cross-mode cell handover provided by the embodiments of the present application can further include the following step 504.

[0245] Step 504, the terminal sends a second message to the access network device corresponding to the second RAT.

[0246] The second message can be used to indicate that the handover is completed or the mobility update is completed, and the second message includes the SN of the first data packet processed by the terminal using the uplink encryption and integrity protection algorithm corresponding to the second cell after switching to the second cell.

[0247] In some embodiments of the present application, the second message can be a handover completion message or a mobility update completion message.

[0248] In some embodiments of the present application, after the terminal completes the handover or the mobility update, the terminal can carry the SN of the first data packet processed by the terminal using the uplink encryption and integrity protection algorithm corresponding to the second cell after switching to the second cell in the second message.

[0249] In this way, the access network device corresponding to the second RAT can determine from which data packet the terminal is in the second RAT through the SN of the data packet in the second message, so that the user has no awareness in the cell handover process, and the effect of the terminal registering and camping in the network of multiple modes is improved.

[0250] In some embodiments of the present application, the "updating the first parameter of the terminal" in the step 502 can include the following step A.

[0251] In the process of performing the cell switching, the terminal performs Cyclic Redundancy Check (CRC) decoding on the received data packet by using a target Radio Network Temporary Identity (RNTI) until the first parameter of the terminal is updated after the decoding by using the RNTI of the terminal in the second cell is successful.

[0252] The target RNTI includes one of the following: the RNTI of the terminal in the first cell and the RNTI of the terminal in the second cell; and the RNTI of the terminal in the second cell.

[0253] In some embodiments of the present application, in the process of performing the cell switching, the access network device corresponding to the second RAT can keep the RNTI of the terminal from being updated, or can configure one RNTI for the terminal in each of the first cell and the second cell.

[0254] In some embodiments of the present application, in the process of performing the cell switching, if the access network device corresponding to the second RAT configures one RNTI for the terminal in each of the first cell and the second cell, the terminal can perform CRC decoding on both of the two RNTIs until the terminal confirms that the cell switching is completed after the decoding by using the RNTI of the terminal in the second cell is successful. At this time, the terminal can update the first parameter of the terminal, and no longer performs decoding by using the RNTI of the terminal in the first cell.

[0255] In this way, since the terminal can perform decoding by using the RNTI of the terminal in the first cell and the RNTI of the terminal in the second cell simultaneously, or directly by using the RNTI of the terminal in the second cell, the new RNTI can be used to decode the data packet in time in the process of switching, so as to avoid decoding failure.

[0256] In some embodiments of the present application, the first message includes the decryption and integrity protection verification algorithm corresponding to the second cell.

[0257] In some embodiments of the present application, the step of updating the first parameter of the terminal in the step 502 can include the following step B.

[0258] In the process of performing the cell switching, the terminal simultaneously processes the received data packet by using the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell until the first parameter of the terminal is updated after the processing by using the decryption and integrity protection verification algorithm corresponding to the second cell is successful.

[0259] In some embodiments of the present application, after receiving the decryption and integrity protection verification algorithm corresponding to the second cell through the first message, the terminal can process the received data packet in parallel using the new and old algorithms.

[0260] In some embodiments of the present application, during the execution of the cell switching process, the terminal can simultaneously use the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell to process the received data packet, and after the decryption and integrity protection verification algorithm corresponding to the second cell is successfully processed, the terminal can confirm that the cell switching is completed. At this time, the terminal can update the first parameter of the terminal, and no longer use the decryption and integrity protection verification algorithm corresponding to the first cell to process the data packet.

[0261] In this way, since the terminal can simultaneously use the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell to process the received data packet, the terminal context and security parameters can be updated while maintaining uninterrupted user plane services, so that the user is not aware during the cell switching process, and the effect of the terminal registering and camping in a network of multiple modes is improved.

[0262] FIG. 15 shows a flowchart of a same-station cross-mode cell switching method according to an embodiment of the present application. As shown in FIG. 15, the same-station cross-mode cell switching method can include the following step 601.

[0263] Step 601: During data transmission of the terminal through the first RAT, the access network device sends a first message to the terminal.

[0264] The first message can be used to indicate the MRSS cell switching.

[0265] In some embodiments of the present application, the first message is used for the terminal to switch from the first cell corresponding to the first RAT to the second cell corresponding to the second RAT, and to update the first parameter of the terminal, the first parameter including at least one of the following: context parameter, security parameter;

[0266] The access network device corresponds to the access network device of the first RAT and the second RAT.

[0267] In some embodiments of the present application, the access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

[0268] The same-station cross-standard cell handover method provided by the embodiments of the present application can perform MRSS cell handover based on a plurality of standard co-station scenarios, thereby realizing non-interruption of the air interface during the cell handover and only updating parameters. In this way, the user is not aware of the cell handover process, and the effect of the terminal registering and camping in a network of multiple standards is improved.

[0269] In some embodiments of the present application, the first message can be a handover message or a mobility update message.

[0270] In some embodiments of the present application, the first message includes a data packet SN, which is the SN of the first data packet processed by the access network device using the downlink encryption and integrity protection algorithm corresponding to the second cell after switching to the second cell.

[0271] In this way, since the access network device can send the SN of the first data packet processed using the downlink encryption and integrity protection algorithm corresponding to the second cell to the terminal, the terminal can use the starting data packet after the cell handover in time, thereby performing corresponding processing and avoiding the occurrence of a lag or parsing failure.

[0272] In some embodiments of the present application, the same-station cross-standard cell handover method provided by the embodiments of the present application can further include the following step 602.

[0273] Step 602: The access network device receives a second message from the terminal.

[0274] The second message can be used to indicate that the handover is complete or the mobility update is complete, and the second message includes the SN of the first data packet processed by the uplink encryption and integrity protection algorithm after switching to the second cell.

[0275] In some embodiments of the present application, after the step 601, the same-station cross-standard cell handover method provided by the embodiments of the present application can further include the following step 603.

[0276] Step 603: After sending the first message to the terminal, the network-side device keeps the RNTI identifier of the terminal from being updated, or configures two RNTIs for the terminal.

[0277] The RNTI is a terminal identifier at the radio access network (RAN) level.

[0278] In this way, since the terminal can simultaneously use the RNTI of the terminal in the first cell and the RNTI of the terminal in the second cell for decoding, or directly use the RNTI of the terminal in the second cell for decoding, the new RNTI can be used to decode the data packet in time during the handover process to avoid decoding failure.

[0279] In some embodiments of the present application, the method for inter-site cross-mode cell handover provided by the embodiments of the present application can further include the following step 604.

[0280] In step 604, the access network device processes the received data packet by using the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell simultaneously during the cell handover of the terminal, and processes the received data packet by using the decryption and integrity protection verification algorithm corresponding to the second cell after the processing by using the decryption and integrity protection verification algorithm corresponding to the second cell is successful.

[0281] In this way, since the terminal can process the received data packet by using the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell simultaneously, the terminal context and the security parameter can be updated without interrupting the user plane service, so that the user is not aware of the cell handover, and the effect of the terminal registering and camping in the network of multiple modes is improved.

[0282] FIG. 16 shows a flow diagram of a method for inter-site cross-mode cell handover provided by an embodiment of the present application. As shown in FIG. 16, the method for inter-site cross-mode cell handover can include the following steps 701 to 703.

[0283] In step 701, during the data transmission of the terminal by using the first RAT, the access network device sends a first message to the terminal, and the first message is used to indicate the MRSS cell handover.

[0284] The first message is used to hand over the terminal from the first cell corresponding to the first RAT to the second cell corresponding to the second RAT, and update the first parameter of the terminal, and the first parameter includes at least one of the following: a context parameter, a security parameter.

[0285] In step 702, the terminal receives the first message from the access network device corresponding to the first RAT in the first cell corresponding to the first RAT.

[0286] In step 703, the terminal switches to the second cell corresponding to the second RAT based on the first message, and updates the first parameter of the terminal.

[0287] The method for inter-site cross-mode cell handover provided by the embodiments of the present application can perform the MRSS cell handover based on the multiple-mode co-site scenario, so that the air interface is not interrupted during the cell handover, and only the parameter is updated. In this way, the user is not aware of the cell handover, and the effect of the terminal registering and camping in the network of multiple modes is improved.

[0288] The same-station cross-standard cell handover method provided by the embodiments of the present application is exemplarily described below by taking specific examples.

[0289] As shown in FIG. 17, the same-station cross-standard cell handover method can include the following steps 801 to 808.

[0290] Step 801: The terminal establishes a connection in a 6G RAT and performs data transmission.

[0291] Step 802: The access network device decides to perform an IRAT HO according to the terminal location, moving speed, measurement, etc.

[0292] It can be understood that the corresponding access network devices before and after the terminal handover are the same access network device.

[0293] Step 803: The access network device sends a HO request to the 5GC through the 6GC.

[0294] Step 804: The access network device sends a HO response to the 6GC through the 5GC.

[0295] Step 805: The access network device sends a mobility update message to the terminal.

[0296] The mobility update message can trigger an SMC process.

[0297] Step 806: The terminal sends a mobility update complete message to the access network device.

[0298] Step 807: The terminal performs MRSS cell handover in a manner of parallel transmission of new and old parameters.

[0299] Step 808: The terminal establishes a connection in a 5G RAT and performs data transmission.

[0300] In this way, since the MRSS cell handover can be performed based on the multiple-standard co-station scenario, the air interface is not interrupted during the cell handover, and only the parameters are updated. In this way, the user is not aware during the cell handover, and the effect of the terminal registering and camping in the network of multiple standards is improved.

[0301] The execution subject of the RAT camping method provided by the embodiments of the present application can be a RAT camping device. The execution subject of the same-station cross-standard cell handover method provided by the embodiments of the present application can be a same-station cross-standard cell handover device. The RAT camping device and the same-station cross-standard cell handover device provided by the embodiments of the present application are described by taking the RAT camping device performing the RAT camping and the same-station cross-standard cell handover device performing the same-station cross-standard cell handover method as examples.

[0302] The embodiments of the present application provide a RAT residing device and a same-station cross-RAT cell switching device. As an example, the RAT residing device and the same-station cross-RAT cell switching device can be a communication device or a component in the communication device, such as a chip. The communication device can be a terminal, a network-side device, a server, or the like. For example, the terminal can include, but is not limited to, the types of the terminal 11 listed above, the network-side device can include, but is not limited to, the types of the network-side device 12 listed above, and the embodiments of the present application do not make specific limitations.

[0303] The RAT residing device and the same-station cross-RAT cell switching device include a receiving module, a sending module, and a processing module. The receiving module, the sending module, and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor. For example, the processor can include a general-purpose processor, a special-purpose processor, or the like, such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, a gate circuit, a transistor, a discrete hardware component, or the like. The receiving module and the sending module can be implemented by a communication interface. The communication interface can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, or the like.

[0304] Specifically, referring to FIG. 18, when the RAT residing device is a terminal or a component in the terminal, the RAT residing device 1800 includes a receiving module 1801 configured to receive first indication information from a network-side device in a case where the terminal resides in a first RAT and a second RAT, the first indication information being used to instruct the terminal to perform a first operation in the second RAT; and a processing module 1802 configured to perform the first operation in the second RAT based on the first indication information received by the receiving module 1801, wherein the network-side device is a core network device or an access network device corresponding to the first RAT, or the network-side device is a core network device or an access network device corresponding to the second RAT, and the first operation is a power saving related operation.

[0305] In a possible implementation, the processing module 1802 is specifically configured to perform at least one of the following:

[0306] determining the first DRX cycle as a paging cycle of the second RAT, the first DRX cycle being greater than a DRX cycle of the first RAT, the terminal being in an idle state or an inactive state under the second RAT;

[0307] determining the first TAU cycle as a TAU cycle of the second RAT, the first TAU cycle being greater than a TAU cycle of the first RAT.

[0308] In a possible implementation, the processing module 1802 is further configured to determine, according to at least one of a service policy and network configuration, that the terminal enters a connected state under the second RAT when the connection establishment under the first RAT is performed.

[0309] In a possible implementation, the sending module 1803 is configured to send, to a core network device corresponding to the first RAT, a first TAU message including the second TAU message in a case where a TAI corresponding to the first RAT changes or a TAU timer of the first RAT expires.

[0310] Alternatively,

[0311] The sending module 1803 is configured to send, to a core network device corresponding to the first RAT, a first TAU message, perform measurement and cell reselection on the second RAT, and send, to a core network device corresponding to the second RAT, a second TAU message.

[0312] Alternatively,

[0313] The sending module 1803 is configured to send, to a core network device corresponding to the first RAT, a first TAU message, the first TAU message being used to trigger updating of a location-related parameter of the terminal in the core network device corresponding to the second RAT.

[0314] The second TAU message is used to indicate updating of the location-related parameter of the terminal in the core network device corresponding to the second RAT.

[0315] In a possible implementation, the processing module 1802 is further configured to perform a second operation in a process in which the terminal performs air interface signal quality measurement on a first cell corresponding to the first RAT.

[0316] The second operation includes at least one of the following: searching for a second cell corresponding to the second RAT, synchronizing with the second cell, measuring the second cell, and acquiring information of the second cell.

[0317] The information of the second cell includes at least one of the following: MIB and SIB.

[0318] In a possible implementation, the receiving module 1801 is further configured to, in a case where the terminal receives a paging message from the core network device corresponding to the first RAT, initiate an RRC connection establishment procedure to the access network device corresponding to the first RAT in response to the paging message, and initiate an RRC connection establishment procedure to the access network device corresponding to the second RAT according to at least one of a network configuration and a service policy.

[0319] In a possible implementation, the paging message contains first identification information and second identification information, the first identification information is used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the first RAT, and the second identification information is used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the second RAT.

[0320] In a possible implementation, the service policy includes at least one of the following:

[0321] a service QoS requirement;

[0322] an IP address of the service;

[0323] the network configuration includes at least one of the following:

[0324] a signal quality threshold value;

[0325] a power threshold value of the terminal;

[0326] second indication information, the second indication information is used to indicate whether the terminal enters a connected state in the second RAT when the terminal performs connection establishment in the first RAT.

[0327] In a possible implementation, the sending module 1803 is configured to, in a case where the terminal is in a DRX mode, send third indication information to the core network device or the access network device corresponding to the first RAT, the third indication information including at least one of the following: a DRX cycle of the terminal in the second RAT, a first SFN time difference, and a second DRX cycle; and the third indication information is used to align a DRX cycle of the terminal in the first RAT and a DRX cycle of the terminal in the second RAT.

[0328] or

[0329] The sending module 1803 is configured to send fourth indication information to the core network device or the access network device corresponding to the second RAT, the fourth indication information including at least one of the following: a DRX cycle of the terminal in the first RAT, a first SFN time difference, and a second DRX cycle; and the fourth indication information is used to align a DRX cycle of the terminal in the first RAT and a DRX cycle of the terminal in the second RAT.

[0330] The first SFN time difference is a SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT.

[0331] The embodiment of the present application provides a RAT residing device. In the case that the RAT residing device resides in two RATs, power saving related operations can be performed on one of the cells in which the RAT residing device resides. Therefore, power consumption of the RAT residing device in the case that the RAT residing device resides in two RATs is reduced, performance of the RAT residing device in the case that the RAT residing device resides in two RATs is improved, and the effect that the RAT residing device registers and resides in networks of multiple modes is improved.

[0332] Referring to FIG. 19, when the RAT residing device is a network side device or a component in the network side device, the RAT residing device 1900 comprises a sending module 1901 configured to send first indication information to a terminal in the case that the terminal resides in a first RAT and a second RAT, and the first indication information is used to instruct the terminal to perform a first operation in the second RAT; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; and the first operation is a power saving related operation.

[0333] In a possible implementation, in the case that the network side device is a core network device corresponding to the first RAT, the device further comprises a receiving module 1902 and a processing module 1903.

[0334] The receiving module 1902 is configured to receive a first TAU message from the terminal.

[0335] The processing module 1903 is configured to update a location related parameter of the first RAT.

[0336] The sending module 1901 is further configured to send a second TAU message or a first update message to a core network device corresponding to the second RAT.

[0337] The first TAU message comprises the second TAU message, and the first update message is generated based on the first TAU message.

[0338] In a possible implementation, in the case that the network side device is a core network device corresponding to the second RAT,

[0339] The receiving module 1902 is configured to receive a second TAU message or a first update message from a core network device corresponding to the first RAT.

[0340] The processing module 1903 is configured to update a location related parameter of the second RAT.

[0341] In a possible implementation, in the case that the network side device is a core network device corresponding to the first RAT,

[0342] The sending module 1901 is further configured to send a paging message to the terminal.

[0343] The sending module 1901 is further configured to, in a case where the response message of the terminal is not received within the first time period, send fifth indication information to a core network device or an access network device corresponding to the second RAT, the fifth indication information being used to indicate paging the terminal.

[0344] In a possible implementation, in a case where the network side device is a core network device or an access network device corresponding to the second RAT,

[0345] The receiving module 1902 is configured to receive fifth indication information from a core network device or an access network device corresponding to the first RAT, the fifth indication information being used to indicate paging the terminal;

[0346] The sending module 1901 is further configured to send a paging message to the terminal.

[0347] In a possible implementation, in a case where the network side device is a core network device or an access network device corresponding to the first RAT,

[0348] The receiving module 1902 is configured to receive third indication information from the terminal, the third indication information including at least one of the following: a DRX cycle of the terminal in the second RAT, a first SFN time difference, and a second DRX cycle; the third indication information being used to align: a DRX cycle of the terminal in the first RAT and a DRX cycle of the terminal in the second RAT, and the first SFN time difference being an SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT;

[0349] The processing module 1903 is configured to set a DRX cycle of the terminal in the first RAT based on the DRX cycle of the terminal in the second RAT and the first SFN time difference.

[0350] Alternatively,

[0351] The processing module 1903 is configured to set a DRX cycle of the terminal in the first RAT based on the second DRX cycle and the first SFN time difference.

[0352] In a possible implementation, in a case where the network side device is a core network device or an access network device corresponding to the second RAT,

[0353] The receiving module 1902 is configured to receive fourth indication information from the terminal, the fourth indication information including at least one of the following: a DRX cycle of the terminal in the first RAT, a first SFN time difference, and a second DRX cycle; the fourth indication information being used to align: a DRX cycle of the terminal in the first RAT and a DRX cycle of the terminal in the second RAT;

[0354] The processing module 1903 is configured to set the DRX cycle of the terminal in the second RAT based on the DRX cycle of the terminal in the first RAT and the first SFN time difference.

[0355] Alternatively,

[0356] The processing module 1903 is configured to set the DRX cycle of the terminal in the second RAT based on the second DRX cycle and the first SFN time difference.

[0357] In a possible implementation, in the case where the network side device is a core network device or an access network device corresponding to the first RAT,

[0358] The sending module 1901 is further configured to send sixth indication information to a core network or an access network device corresponding to the second RAT, the sixth indication information including at least one of the following: the DRX cycle of the terminal in the first RAT, and the SFN of the cell corresponding to the first RAT.

[0359] The processing module 1903 is configured to set the DRX cycle of the terminal in the second RAT based on the sixth indication information.

[0360] In a possible implementation, in the case where the network side device is a core network or an access network device corresponding to the second RAT,

[0361] The sending module 1901 is further configured to send seventh indication information to a core network or an access network device corresponding to the first RAT, the seventh indication information including at least one of the following: the DRX cycle of the terminal in the second RAT, and the SFN of the cell corresponding to the second RAT.

[0362] The processing module 1903 is configured to set the DRX cycle of the terminal in the first RAT based on the seventh indication information.

[0363] The embodiments of the present application provide a RAT camping device, since in the case of dual camping of the terminal, power saving related operations can be performed on one of the camped cells. Therefore, the power consumption of the terminal in dual camping is reduced, the performance of the terminal in dual camping is improved, and the effect of the terminal in registering and camping in networks of multiple modes is improved.

[0364] Referring to FIG. 20, when the inter-station cross-mode cell handover apparatus is a terminal or a component in the terminal, the inter-station cross-mode cell handover apparatus 2000 includes a receiving module 2001 configured to receive, by the terminal, a first message from an access network device corresponding to a first RAT during data transmission by the terminal through the first RAT in a first cell corresponding to the first RAT, the first message being used to indicate execution of MRSS cell handover; and a processing module 2002 configured to switch to a second cell corresponding to a second RAT based on the first message received by the receiving module 2001, and update a first parameter of the terminal, the first parameter including at least one of the following: a context parameter and a security parameter.

[0365] In a possible implementation, the access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

[0366] In a possible implementation, the first message is a handover message or a mobility update message.

[0367] The first message includes a packet sequence number SN, and the SN is a SN of a first packet processed by the access network device corresponding to the second RAT using a downlink encryption and integrity protection algorithm corresponding to the second cell after the terminal switches to the second cell.

[0368] In a possible implementation, the processing module 2002 is further configured to perform at least one of decryption processing and integrity protection verification processing on data from the access network device corresponding to the second RAT based on the updated first parameter.

[0369] In a possible implementation, the apparatus further includes a sending module 2003 configured to send a second message to the access network device corresponding to the second RAT, the second message being used to indicate completion of handover or completion of mobility update, and the second message including a SN of a first packet processed by the terminal using an uplink encryption and integrity protection algorithm corresponding to the second cell after switching to the second cell.

[0370] In a possible implementation, the processing module 2002 is specifically configured to perform cyclic redundancy check (CRC) decoding on the received data packet using a target radio network temporary identifier (RNTI) during execution of the cell handover, and update the first parameter of the terminal after decoding is successful using an RNTI of the terminal in the second cell.

[0371] The target RNTI includes one of the following:

[0372] The RNTI of the terminal in the first cell and the RNTI of the terminal in the second cell;

[0373] The RNTI of the terminal in the second cell.

[0374] In a possible implementation, the first message contains a decryption and integrity protection check algorithm corresponding to the second cell.

[0375] The processing module 2002 is specifically configured to, in the process of performing the cell switching, simultaneously process the received data packet by using the decryption and integrity protection check algorithm corresponding to the first cell and the decryption and integrity protection algorithm corresponding to the second cell, until the processing by using the decryption and integrity protection check algorithm corresponding to the second cell is successful, and then updating the first parameter of the terminal.

[0376] The embodiment of the present application provides a same-station cross-standard cell switching device. Since the MRSS cell switching can be performed based on the multiple-standard co-station scenario, the same-station cross-standard cell switching device can realize non-interruption of the air interface in the cell switching process and only update the parameters. In this way, the user is not aware of the cell switching process, and the effect of the same-station cross-standard cell switching device in registering and camping in the network of multiple standards is improved.

[0377] Referring to FIG. 21, when the RAT camping device is a network side device or a component in the network side device, the same-station cross-standard cell switching device 2100 includes a sending module 2101 configured to send a first message to a terminal in the process of data transmission of the terminal through a first RAT, the first message being used to indicate MRSS cell switching; wherein the first message is used to switch the terminal from a first cell corresponding to the first RAT to a second cell corresponding to a second RAT, and update a first parameter of the terminal, the first parameter including at least one of the following: a context parameter, a security parameter; and an access network device is an access network device corresponding to the first RAT and the second RAT.

[0378] In a possible implementation, the access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

[0379] In a possible implementation, the first message is a switching message or a mobile update message.

[0380] The first message includes a data packet SN, and the data packet SN is the SN of the first data packet processed by the access network device by using a downlink encryption and integrity protection algorithm corresponding to the second cell after switching to the second cell.

[0381] In a possible implementation, the device further includes a receiving module 2102 configured to receive a second message from the terminal, the second message being used to indicate that the switching is completed or the mobile update is completed, and the second message including the SN of the first data packet processed by the uplink encryption and integrity protection algorithm after switching to the second cell.

[0382] In a possible implementation, the apparatus further includes a processing module 2103, which is further configured to, in the process of cell switching of the terminal, keep the RNTI identifier of the terminal from being updated by the network-side device, or configure two RNTIs for the terminal.

[0383] The RNTI is a terminal identifier at a radio access network (RAN) level.

[0384] In a possible implementation, the processing module 2103 is further configured to, after the first message is sent to the terminal, simultaneously process the received data packet by using the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell, until the processing by using the decryption and integrity protection verification algorithm corresponding to the second cell is successful, and then process the received data packet by using the decryption and integrity protection verification algorithm corresponding to the second cell.

[0385] The embodiment of the present application provides a same-station cross-standard cell switching apparatus, which can perform MRSS cell switching based on a plurality of standards in a same-station scenario, thereby realizing non-interruption of an air interface in a cell switching process and only updating parameters. In this way, a user in the cell switching process is not aware, and the effect of registration and camping of a terminal in a network of a plurality of standards is improved.

[0386] The RAT camping apparatus provided in the embodiment of the present application can realize each process of the RAT camping method provided in the embodiment of the present application and achieve the same technical effect. To avoid repetition, details are not described herein.

[0387] The same-station cross-standard cell switching apparatus provided in the embodiment of the present application can realize each process of the same-station cross-standard cell switching method provided in the embodiment of the present application and achieve the same technical effect. To avoid repetition, details are not described herein.

[0388] As shown in FIG. 22, the embodiment of the present application further provides a communication device 2200, which includes a processor 2201 and a memory 2202, and the memory 2202 stores programs or instructions executable on the processor 2201. For example, when the communication device 2200 is a terminal, the programs or instructions are executed by the processor 2201 to implement each step of the RAT camping method and the same-station cross-standard cell switching method provided in the embodiments of the present application, and the same technical effect can be achieved. When the communication device 2200 is a network-side device, the programs or instructions are executed by the processor 2201 to implement each step of the RAT camping method and the same-station cross-standard cell switching method provided in the embodiments of the present application, and the same technical effect can be achieved. To avoid repetition, details are not described herein.

[0389] The terminal provided in the embodiments of the present application comprises a processor and a communication interface, the communication interface is coupled with the processor, and the processor is configured to run programs or instructions to implement the steps in the method embodiments of the RAT camping method and the same-station cross-standard cell handover method. The terminal embodiments correspond to the above-mentioned terminal-side method embodiments, and each implementation process and implementation manner of the above-mentioned method embodiments can be applied to the terminal embodiments and can achieve the same technical effects. The terminal can be the RAT camping apparatus shown in FIG. 18, or the terminal can be the same-station cross-standard cell handover apparatus shown in FIG. 20. Specifically, FIG. 23 is a schematic diagram of the hardware structure of a terminal for implementing the embodiments of the present application.

[0390] The terminal 2300 includes, but is not limited to, at least part of components such as a radio frequency unit 2301, a network module 2302, an audio output unit 2303, an input unit 2304, a sensor 2305, a display unit 2306, a user input unit 2307, an interface unit 2308, a memory 2309, and a processor 2310.

[0391] Those skilled in the art can understand that the terminal 2300 can further include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 2310 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 23 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than those shown, or combine certain components, or have a different component arrangement, which will not be described here.

[0392] It should be understood that in the embodiments of the present application, the input unit 2304 can include a graphics processor 23041 and a microphone 23042, and the graphics processor 23041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 2306 can include a display panel 23061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 2307 includes at least one of a touch panel 23071 and other input devices 23072. The touch panel 23071 is also called a touch screen. The touch panel 23071 can include a touch detection device and a touch controller. The other input devices 23072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, etc., which will not be described here.

[0393] In the embodiments of the present application, the radio frequency unit 2301 can transmit the downlink data received from the network side device to the processor 2310 for processing. In addition, the radio frequency unit 2301 can send uplink data to the network side device. Generally, the radio frequency unit 2301 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0394] The memory 2309 can be used to store software programs or instructions and various data. The memory 2309 can mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area can store an operating system, at least one application program or instruction required by a function (such as a sound playing function, an image playing function, etc.), etc. In addition, the memory 2309 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synch link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 2309 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0395] The processor 2310 can include one or more processing units; optionally, the processor 2310 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 2310.

[0396] In the terminal implements the RAT camping method provided in the application, the radio frequency unit 2301 is configured to receive first indication information from a network side device in a case where the terminal camps on a first RAT and a second RAT, the first indication information being used to instruct the terminal to perform a first operation on the second RAT; the processor 2310 is configured to perform the first operation on the second RAT based on the first indication information received by the radio frequency unit 2301; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; and the first operation is a power saving related operation.

[0397] In a possible implementation, the processor 2310 is specifically configured to perform at least one of the following:

[0398] determining the first DRX cycle as a paging cycle of the second RAT, the first DRX cycle being greater than a DRX cycle of the first RAT, and the terminal being in an idle state or an inactive state under the second RAT;

[0399] determining the first TAU cycle as a TAU cycle of the second RAT, the first TAU cycle being greater than a TAU cycle of the first RAT.

[0400] In a possible implementation, the processor 2310 is further configured to determine that the terminal enters a connected state under the second RAT according to at least one of a service policy and network configuration when the terminal performs connection establishment under the first RAT.

[0401] In a possible implementation, the radio frequency unit 2301 is configured to send a first TAU message to a core network device corresponding to the first RAT in a case where a TAI corresponding to the first RAT changes or a TAU timer of the first RAT expires, the first TAU message including a second TAU message.

[0402] or,

[0403] the radio frequency unit 2301 is configured to send a first TAU message to a core network device corresponding to the first RAT, perform measurement and cell reselection on the second RAT, and send a second TAU message to a core network device corresponding to the second RAT;

[0404] or,

[0405] the radio frequency unit 2301 is configured to send a first TAU message to a core network device corresponding to the first RAT, the first TAU message being used to trigger location related parameter update of the terminal in the core network device corresponding to the second RAT;

[0406] wherein the second TAU message is used to instruct the location related parameter update of the terminal in the core network device corresponding to the second RAT.

[0407] In a possible implementation, the processor 2310 is further configured to perform a second operation in a process in which the terminal performs air interface signal quality measurement of a first cell corresponding to a first RAT;

[0408] The second operation includes at least one of the following: searching for a second cell corresponding to a second RAT, synchronizing with the second cell, measuring the second cell, and acquiring information of the second cell.

[0409] The information of the second cell includes at least one of the following: MIB and SIB.

[0410] In a possible implementation, the radio frequency unit 2301 is configured to, in a case where the terminal receives a paging message from a core network device corresponding to the first RAT, initiate an RRC connection establishment procedure to the access network device corresponding to the first RAT in response to the paging message, and initiate an RRC connection establishment procedure to the access network device corresponding to the second RAT according to at least one of network configuration and service policy.

[0411] In a possible implementation, the paging message includes first identification information and second identification information, the first identification information is used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the first RAT, and the second identification information is used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the second RAT.

[0412] In a possible implementation, the service policy includes at least one of the following:

[0413] Service QoS requirement;

[0414] IP address of the service;

[0415] The network configuration includes at least one of the following:

[0416] Signal quality threshold value;

[0417] Power threshold value of the terminal;

[0418] Second indication information, the second indication information is used to indicate whether the terminal enters a connected state in the second RAT when the terminal performs connection establishment in the first RAT.

[0419] In a possible implementation, the radio frequency unit 2301 is configured to, in a case where the terminal is in a DRX mode, send third indication information to the core network device or the access network device corresponding to the first RAT, the third indication information includes at least one of the following: DRX cycle of the terminal in the second RAT, first SFN time difference, and second DRX cycle; and the third indication information is used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT.

[0420] Or,

[0421] The radio frequency unit 2301 is configured to send fourth indication information to a core network device or an access network device corresponding to the second RAT, and the fourth indication information includes at least one of the following: a DRX cycle of the terminal in the first RAT, the first SFN time difference, and the second DRX cycle; and the fourth indication information is used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT.

[0422] The first SFN time difference is an SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT.

[0423] The embodiments of the present application provide a terminal. Since the power saving related operation is performed on one of the cells in which the terminal is dual-registered, the power consumption of the terminal in dual-registered state is reduced, the performance of the terminal in dual-registered state is improved, and the effect of the terminal in registering and camping on networks of multiple modes is improved.

[0424] When the terminal implements the RAT camping method provided by the embodiments of the present application, the radio frequency unit 2301 is configured to receive a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT during data transmission of the terminal through the first RAT, and the first message is used to instruct to perform MRSS cell switching; the processor 2310 is configured to switch to a second cell corresponding to the second RAT based on the first message received by the radio frequency unit 2301, and update a first parameter of the terminal, and the first parameter includes at least one of the following: a context parameter and a security parameter.

[0425] In a possible implementation, the access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

[0426] In a possible implementation, the first message is a switching message or a mobile update message.

[0427] The first message includes a data packet sequence number SN, and the SN is a SN of a first data packet processed by the access network device corresponding to the second RAT using a downlink encryption and integrity protection algorithm corresponding to the second cell after the terminal switches to the second cell.

[0428] In a possible implementation, the processor 2310 is further configured to perform at least one of decryption processing and integrity protection verification processing on data from the access network device corresponding to the second RAT based on the updated first parameter.

[0429] In a possible implementation, the apparatus further includes a radio frequency unit 2301 configured to send a second message to an access network device corresponding to the second RAT, the second message being used to indicate that the handover is completed or the mobility update is completed, and the first data packet processed by the terminal using the uplink encryption and integrity protection algorithm corresponding to the second cell after the handover to the second cell includes a SN.

[0430] In a possible implementation, the processor 2310 is specifically configured to, in the process of performing the cell handover, perform cyclic redundancy check (CRC) decoding on the received data packet using a target radio network temporary identifier (RNTI) until the first parameter of the terminal is updated after the decoding is successful using the RNTI of the terminal in the second cell.

[0431] The target RNTI includes one of the following:

[0432] The RNTI of the terminal in the first cell and the RNTI of the terminal in the second cell;

[0433] The RNTI of the terminal in the second cell.

[0434] In a possible implementation, the first message includes a decryption and integrity protection verification algorithm corresponding to the second cell.

[0435] The processor 2310 is specifically configured to, in the process of performing the cell handover, process the received data packet using the decryption and integrity protection verification algorithm corresponding to the first cell and the decryption and integrity protection verification algorithm corresponding to the second cell at the same time, and update the first parameter of the terminal after the processing using the decryption and integrity protection verification algorithm corresponding to the second cell is successful.

[0436] The embodiments of the present application provide a terminal. Since the MRSS cell handover can be performed based on the multi-standard co-site scenario, the air interface is not interrupted during the cell handover, and only the parameter is updated. In this way, the user is not aware during the cell handover, and the effect of the terminal registering and camping in the network of multiple standards is improved.

[0437] It can be understood that the implementation process of each implementation manner mentioned in the embodiments can refer to the related description of the above method embodiments, and achieve the same or corresponding technical effects. To avoid repetition, it will not be described here again.

[0438] The embodiment of the present application further provides a network side device, comprising a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used to run programs or instructions to realize the steps of the method embodiment of the same-station cross-mode cell handover method. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment and achieve the same technical effects.

[0439] Specifically, the embodiment of the present application further provides a network side device. As shown in FIG. 24, the network side device 2400 comprises a processor 2401, a network interface 2402 and a memory 2403. The network side device can be the RAT camping device shown in FIG. 19, or the network side device can be the same-station cross-mode cell handover device shown in FIG. 21. The network interface 2402 is, for example, a common public radio interface (CPRI).

[0440] Specifically, the network side device 2400 of the embodiment of the present application further comprises instructions or programs stored in the memory 2403 and executable on the processor 2401, the processor 2401 invokes the instructions or programs in the memory 2403 to execute the method performed by each module shown in FIG. 19 or FIG. 21, and achieves the same technical effects. To avoid repetition, details are not described here.

[0441] The embodiment of the present application further provides a readable storage medium, the readable storage medium stores programs or instructions, the programs or instructions are executed by the processor to realize each process of the above-mentioned RAT camping method and same-station cross-mode cell handover method embodiment, and achieve the same technical effects. To avoid repetition, details are not described here.

[0442] The processor is the processor in the terminal in the above-mentioned embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0443] The embodiment of the present application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used to run programs or instructions to realize each process of the above-mentioned RAT camping method and same-station cross-mode cell handover method embodiment, and achieve the same technical effects. To avoid repetition, details are not described here.

[0444] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0445] The embodiments of the present application further provide a computer program / product stored in a storage medium, which is executed by at least one processor to implement the processes of the above-mentioned RAT camping method and the inter-site cross-RAT cell handover method, and achieve the same technical effects. To avoid repetition, details are not described herein.

[0446] The embodiments of the present application further provide a communication system, which comprises a terminal and a network side device. The terminal can be used to execute the steps of the above-mentioned RAT camping method, and the network side device can be used to execute the steps of the above-mentioned inter-site cross-RAT cell handover method.

[0447] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to the order of performing the functions shown or discussed, and can also include performing the functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0448] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of computer software products and general hardware platforms, of course, they can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making the terminal or network side device execute the method described in each embodiment of the present application.

[0449] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive. Those skilled in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims.

Claims

1. A method for a terminal to reside in a radio access technology (RAT), comprising: receiving, by the terminal, first indication information from a network side device, the first indication information being used to instruct the terminal to perform a first operation in a second RAT, in a case that the terminal resides in a first RAT and the second RAT; performing, by the terminal, the first operation in the second RAT based on the first indication information; wherein the network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; the first operation is a power saving related operation.

2. The method of claim 1, wherein, the power saving related operation comprises at least one of the following: determining, by the terminal, a first discontinuous reception (DRX) cycle as a paging cycle of the second RAT, the first DRX cycle being greater than a DRX cycle of the first RAT, and the terminal being in an idle state or an inactive state in the second RAT; determining, by the terminal, a first tracking area update (TAU) cycle as a TAU cycle of the second RAT, the first TAU cycle being greater than a TAU cycle of the first RAT.

3. The method of claim 1 or 2, wherein, the method further comprises: determining, by the terminal, to enter a connected state in the second RAT according to at least one of a service policy and a network configuration, when performing connection establishment in the first RAT.

4. The method according to any one of claims 1 to 3, wherein, in a case that a tracking area identifier (TAI) of a cell corresponding to the first RAT changes or a TAU timer of the first RAT expires, the method further comprises: sending, by the terminal, a first TAU message to a core network device corresponding to the first RAT, the first TAU message comprising a second TAU message; or, sending, by the terminal, a first TAU message to a core network device corresponding to the first RAT, performing measurement and cell reselection in the second RAT, and sending a second TAU message to a core network device corresponding to the second RAT; or, sending, by the terminal, a first TAU message to a core network device corresponding to the first RAT, the first TAU message being used to trigger an update of a location related parameter of the terminal in a core network device corresponding to the second RAT; wherein the second TAU message is used to instruct the update of the location related parameter of the terminal in the core network device corresponding to the second RAT.

5. The method according to any one of claims 1 to 4, wherein, the method further comprises: performing, by the terminal, a second operation during a process in which the terminal performs an air interface signal quality measurement of a first cell corresponding to the first RAT; wherein the second operation comprises at least one of the following: search of a second cell corresponding to the second RAT, synchronization of the second cell, measurement of the second cell, and information acquisition of the second cell; the information of the second cell comprises at least one of the following: a master information block (MIB) and a system information block (SIB).

6. The method according to any one of claims 1 to 5, wherein, the method further comprises: In a case that the terminal receives a paging message from a core network device corresponding to the first RAT, the terminal initiates a radio resource control (RRC) connection establishment procedure to the access network device corresponding to the first RAT in response to the paging message, and initiates an RRC connection establishment procedure to the access network device corresponding to the second RAT according to at least one of a network configuration and a service policy.

7. The method of claim 6, wherein, The paging message comprises first identification information and second identification information, the first identification information being used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the first RAT, and the second identification information being used to indicate a terminal identifier corresponding to the terminal when the terminal is registered in the second RAT.

8. The method of claim 3 or 6, wherein, The service policy comprises at least one of: a service quality of service (QoS) requirement; an Internet protocol (IP) address of the service; The network configuration comprises at least one of: a signal quality threshold value; a power threshold value of the terminal; second indication information, the second indication information being used to indicate whether the terminal enters a connected state in the second RAT when the terminal performs connection establishment in the first RAT.

9. The method of claim 1 or 2, wherein, In a case that the terminal is in a DRX mode, the method further comprises: The terminal sends third indication information to the core network device or the access network device corresponding to the first RAT, the third indication information comprising at least one of a DRX cycle of the terminal in the second RAT, a first system frame number (SFN) time difference, and a second DRX cycle, and the third indication information being used to align a DRX cycle of the terminal in the first RAT and a DRX cycle of the terminal in the second RAT. Alternatively, The terminal sends fourth indication information to the core network device or the access network device corresponding to the second RAT, the fourth indication information comprising at least one of a DRX cycle of the terminal in the first RAT, the first SFN time difference, and the second DRX cycle, and the fourth indication information being used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT. The first SFN time difference is a SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT.

10. A RAT camping method, comprising: In a case that a terminal camps on a first RAT and a second RAT, a network side device sends first indication information to the terminal, the first indication information being used to indicate that the terminal performs a first operation in the second RAT; The network side device is a core network device or an access network device corresponding to the first RAT, or the network side device is a core network device or an access network device corresponding to the second RAT; The first operation is a power saving related operation.

11. The method of claim 10, wherein, In a case that the network side device is a core network device corresponding to the first RAT, the method further comprises: The network side device receives a first tracking area update (TAU) message from the terminal, updates a location related parameter of the first RAT, and sends a second TAU message or a first update message to a core network device corresponding to the second RAT; The first TAU message includes a second TAU message, and the first update message is generated based on the first TAU message.

12. The method of claim 10 or 11, wherein, In a case where the network side device is a core network device corresponding to the second RAT, the method further includes: The network side device receives a second TAU message or a first update message from a core network device corresponding to the first RAT, and updates a location-related parameter of the second RAT.

13. The method according to any one of claims 10 to 12, wherein, In a case where the network side device is a core network device corresponding to the first RAT, the method further includes: The network side device sends a paging message to the terminal. In a case where the network side device does not receive a response message from the terminal within a first time period, the network side device sends fifth indication information to a core network device or an access network device corresponding to the second RAT, the fifth indication information being used to indicate paging the terminal.

14. The method of claim 13, wherein, In a case where the network side device is a core network or an access network device corresponding to the second RAT, the method further includes: The network side device receives fifth indication information from a core network or an access network device corresponding to the first RAT, the fifth indication information being used to indicate paging the terminal. The network side device sends a paging message to the terminal.

15. The method of claim 10, wherein, In a case where the network side device is a core network device or an access network device corresponding to the first RAT, the method further includes: The network side device receives third indication information from the terminal, the third indication information including at least one of a DRX cycle of the terminal in the second RAT, a first SFN time difference, and a second DRX cycle, the third indication information being used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT, and the first SFN time difference being an SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT. The network side device sets a DRX cycle of the terminal in the first RAT based on the third indication information.

16. The method of claim 10, wherein, In a case where the network side device is a core network device or an access network device corresponding to the second RAT, the method further includes: The network side device receives fourth indication information from the terminal, the fourth indication information including at least one of a DRX cycle of the terminal in the first RAT, a first SFN time difference, and a second DRX cycle, the fourth indication information being used to align the DRX cycle of the terminal in the first RAT and the DRX cycle of the terminal in the second RAT, and the first SFN time difference being an SFN time difference between a cell corresponding to the first RAT and a cell corresponding to the second RAT. The network side device sets a DRX cycle of the terminal in the second RAT based on the fourth indication information.

17. The method of claim 10, wherein, In a case where the network side device is a core network device or an access network device corresponding to the first RAT, the method further includes: The network side device sends sixth indication information to a core network or an access network device corresponding to the second RAT, the sixth indication information including at least one of the following: a DRX cycle of the terminal in the first RAT, a SFN of a cell corresponding to the first RAT; The network side device sets a DRX cycle of the terminal in the second RAT based on the sixth indication information.

18. The method of claim 10, wherein, In the case that the network side device is a core network or an access network device corresponding to the second RAT, the method further includes: The network side device sends seventh indication information to a core network or an access network device corresponding to the first RAT, the seventh indication information including at least one of the following: a DRX cycle of the terminal in the second RAT, a SFN of a cell corresponding to the second RAT; The network side device sets a DRX cycle of the terminal in the first RAT based on the seventh indication information.

19. A method for inter-site cross-RAT cell handover, comprising: In a process of data transmission of a terminal through a first RAT, the terminal receives a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT, the first message being used for indicating to perform a multi-RAT radio spectrum sharing (MRSS) cell handover; The terminal switches to a second cell corresponding to a second RAT based on the first message, and updates a first parameter of the terminal, the first parameter including at least one of the following: a context parameter, a security parameter.

20. The method of claim 19, wherein, The access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

21. The method of claim 19 or 20, wherein, A data packet sequence number (SN) is included in the first message, the SN being an SN of a first data packet processed by an access network device corresponding to the second RAT using downlink encryption and integrity protection algorithms corresponding to the second cell after the terminal switches to the second cell.

22. The method of any one of claims 19 to 21, wherein, The method further includes: The terminal performs at least one of decryption processing and integrity protection verification processing on data from the access network device corresponding to the second RAT based on the updated first parameter.

23. The method of claim 21 or 22, wherein, The method further includes: The terminal sends a second message to the access network device corresponding to the second RAT, the second message being used for indicating that the handover is completed or that the mobility update is completed, and the second message including an SN of a first data packet processed by the terminal using uplink encryption and integrity protection algorithms corresponding to the second cell after switching to the second cell.

24. The method of any one of claims 19 to 23, wherein, The updating of the first parameter of the terminal includes: In a process of performing cell handover, the terminal performs cyclic redundancy check (CRC) decoding on received data packets using a target radio network temporary identifier (RNTI) until the first parameter of the terminal is updated after successful decoding using an RNTI in the second cell; The target RNTI includes one of the following: An RNTI of the terminal in the first cell and an RNTI of the terminal in the second cell; An RNTI of the terminal in the second cell.

25. The method of any one of claims 19 to 24, wherein, The first message comprises a decryption and integrity protection check algorithm corresponding to the second cell; The updating the first parameter of the terminal comprises: The terminal simultaneously processes the received data packet by using the decryption and integrity protection check algorithm corresponding to the first cell and the decryption and integrity protection check algorithm corresponding to the second cell until the decryption and integrity protection check algorithm corresponding to the second cell is successfully used to process the received data packet, and then the first parameter of the terminal is updated.

26. A same-site inter-RAT cell switching method, comprising: In a process in which a terminal transmits data by using a first RAT, an access network device sends a first message to the terminal, and the first message is used to indicate MRSS cell switching; The first message is used to switch the terminal from a first cell corresponding to the first RAT to a second cell corresponding to a second RAT, and update a first parameter of the terminal, and the first parameter comprises at least one of the following: a context parameter and a security parameter. The access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

27. The method of claim 26, wherein, The first message comprises a data packet SN, and the data packet SN is the SN of a first data packet processed by using a downlink encryption and integrity protection algorithm corresponding to the second cell after switching to the second cell.

28. The method of claim 26 or 27, wherein, The method further comprises:

29. The method of claim 26, wherein, The access network device receives a second message from the terminal, and the second message is used to indicate that switching is completed or mobile updating is completed, and the second message comprises a first data packet SN processed by using an uplink encryption and integrity protection algorithm after switching to the second cell. The method further comprises:

30. The method of any one of claims 26 to 29, wherein, In a process in which the terminal performs cell switching, the network side device keeps a RNTI identifier of the terminal from being updated, or configures two RNTIs for the terminal. The RNTI is a terminal identifier at a radio access network (RAN) level. The method further comprises:

31. The method of any one of claims 26 to 30, wherein, After the access network device sends the first message to the terminal, the access network device simultaneously processes the received data packet by using the decryption and integrity protection check algorithm corresponding to the first cell and the decryption and integrity protection check algorithm corresponding to the second cell until the decryption and integrity protection check algorithm corresponding to the second cell is successfully used to process the received data packet, and then the decryption and integrity protection check algorithm corresponding to the second cell is used to process the received data packet. A receiving module and a processing module; 32. A RAT camping arrangement comprising: The receiving module is configured to receive first indication information from a network side device in a case where a terminal camps on a first RAT and a second RAT, and the first indication information is used to instruct the terminal to perform a first operation on the second RAT; The processing module is configured to perform the first operation on the second RAT based on the first indication information received by the receiving module. ​ The network-side device is a core network device or an access network device corresponding to the first RAT, or the network-side device is a core network device or an access network device corresponding to the second RAT. The first operation is a power saving related operation.

33. The apparatus of claim 32, wherein, The processing module is specifically configured to perform at least one of the following: The first DRX cycle is determined as a paging cycle of the second RAT, the first DRX cycle is greater than a DRX cycle of the first RAT, and the terminal is in an idle state or an inactive state under the second RAT; The first TAU cycle is determined as a TAU cycle of the second RAT, and the first TAU cycle is greater than a TAU cycle of the first RAT.

34. The apparatus of claim 32 or 33, wherein, The processing module is further configured to determine, according to at least one of a service policy and network configuration, that the terminal enters a connected state under the second RAT when connection establishment is performed under the first RAT.

35. The apparatus of any one of claims 32 to 34, wherein, The apparatus further includes a sending module. The sending module is configured to send, to a core network device corresponding to the first RAT, a first TAU message including a second TAU message in a case where a TAI corresponding to the first RAT changes or a TAU timer of the first RAT expires. Or, The sending module is configured to send, to a core network device corresponding to the first RAT, a first TAU message, perform measurement and cell reselection on the second RAT, and send, to a core network device corresponding to the second RAT, a second TAU message. Or, The sending module is configured to send, to a core network device corresponding to the first RAT, a first TAU message, the first TAU message being used to trigger updating of location related parameters of the terminal in the core network device corresponding to the second RAT. The second TAU message is used to indicate updating of location related parameters of the terminal in the core network device corresponding to the second RAT.

36. A RAT camping arrangement comprising: The sending module is configured to send, to the terminal, first indication information indicating that the terminal performs a first operation under the second RAT in a case where the terminal camps on the first RAT and the second RAT. The network-side device is a core network device or an access network device corresponding to the first RAT, or the network-side device is a core network device or an access network device corresponding to the second RAT. The first operation is a power saving related operation. In a case where the network-side device is a core network device corresponding to the first RAT, the apparatus further includes a receiving module and a processing module.

37. The apparatus of claim 36, wherein, The receiving module is configured to receive a first TAU message from the terminal. The processing module is configured to update location related parameters of the first RAT. The sending module is further configured to send, to a core network device corresponding to the second RAT, a second TAU message or a first update message. The first TAU message includes the second TAU message, and the first update message is generated based on the first TAU message. The receiving module and the processing module are configured to perform at least one of the following:

38. An apparatus for in-coverage inter-RAT cell handover, comprising: ​ The receiving module is configured to receive, in a process in which the terminal performs data transmission by using a first radio access technology (RAT), a first message from an access network device corresponding to the first RAT in a first cell corresponding to the first RAT, the first message being used to instruct to perform a multi-radio access technology (RAT) sharing (MRSS) cell switching. The processing module is configured to switch to a second cell corresponding to a second RAT based on the first message received by the receiving module, and update a first parameter of the terminal, the first parameter including at least one of a context parameter and a security parameter.

39. The device of claim 38, wherein, The access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

40. The apparatus of claim 38 or 39, wherein, The first message includes a sequence number (SN) of a data packet, and the SN is an SN of a first data packet processed by an access network device corresponding to the second RAT using downlink encryption and integrity protection algorithms corresponding to the second cell after the terminal switches to the second cell.

41. The apparatus of any one of claims 38 to 40, wherein, The processing module is further configured to perform at least one of decryption processing and integrity protection verification processing on data from the access network device corresponding to the second RAT based on the updated first parameter.

42. The apparatus of any one of claims 38 to 41, wherein, The processing module is specifically configured to perform cyclic redundancy check (CRC) decoding on the received data packet using a target radio network temporary identifier (RNTI) in a process of performing the cell switching, and update the first parameter of the terminal after successful decoding using an RNTI of the terminal in the second cell. The target RNTI includes one of the following: An RNTI of the terminal in the first cell and an RNTI of the terminal in the second cell; and An RNTI of the terminal in the second cell.

43. The apparatus of any one of claims 38 to 42, wherein, The first message includes decryption and integrity protection verification algorithms corresponding to the second cell. The processing module is specifically configured to perform processing on the received data packet using the decryption and integrity protection verification algorithms corresponding to the first cell and the decryption and integrity protection verification algorithms corresponding to the second cell simultaneously in a process of performing the cell switching, and update the first parameter of the terminal after successful processing using the decryption and integrity protection verification algorithms corresponding to the second cell.

44. An apparatus for in-coverage inter-RAT cell handover, comprising: A sending module The sending module is configured to send, in a process in which the terminal performs data transmission by using a first radio access technology (RAT), a first message to the terminal, the first message being used to instruct to perform a multi-radio access technology (RAT) sharing (MRSS) cell switching. The first message is used to switch the terminal from a first cell corresponding to the first RAT to a second cell corresponding to a second RAT, and update a first parameter of the terminal, the first parameter including at least one of a context parameter and a security parameter. The access network device is an access network device corresponding to the first RAT and a second RAT.

45. The device of claim 44, wherein, The access network device corresponding to the first RAT and the access network device corresponding to the second RAT are deployed in one node.

46. The apparatus of claim 44 or 45, wherein, The apparatus further includes a receiving module The receiving module is configured to receive a second message from the terminal, the second message being used to indicate that handover is completed or mobility update is completed, and the first data packet SN of uplink encryption and integrity protection algorithm processing after handover to the second cell is included in the second message. 47.A terminal comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implement the RAT camping method of any one of claims 1 to 9, or implement the steps of the inter-site cross-technology cell handover method of any one of claims 19 to 25. 48.A network side device comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implement the RAT camping method of any one of claims 10 to 18, or implement the steps of the inter-site cross-technology cell handover method of any one of claims 26 to 31. 49.A readable storage medium, the readable storage medium storing programs or instructions, the programs or instructions, when executed by a processor, implement the RAT camping method of any one of claims 1 to 9, or implement the RAT camping method of any one of claims 10 to 18, or implement the steps of the inter-site cross-technology cell handover method of any one of claims 19 to 25, or implement the steps of the inter-site cross-technology cell handover method of any one of claims 26 to 31. 50.A computer program product stored in a storage medium, the computer program product being executed by at least one processor to implement the RAT camping method of any one of claims 1 to 9, or implement the RAT camping method of any one of claims 10 to 18, or implement the steps of the inter-site cross-technology cell handover method of any one of claims 19 to 25, or implement the steps of the inter-site cross-technology cell handover method of any one of claims 26 to 31.

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