Switching method and device, terminal, source network equipment and target network equipment

Abstract

The invention relates to a switching method and device, a terminal, source network equipment and target network equipment. In at least one embodiment of the present disclosure, a terminal receives a cell radio network temporary identifier allocated to the terminal by a target network device, and uses the cell radio network temporary identifier to monitor a control channel sent by the target network device, the control channel being a control channel scrambled by using the cell radio network temporary identifier, so that the user experience is improved. The terminal can obtain information such as a random access resource configured for the terminal by the target network equipment through the control channel, so that a random access process with the target network is completed based on the random access resource, and terminal special configuration of the terminal in the target network can be sent to the terminal by the target network equipment after the random access process is completed. Therefore, in the switching process, the terminal special configuration of the terminal in the target network does not need to be sent to the source network device from the target network device, inter-satellite interaction is reduced, system overhead is reduced, and resource waste and signaling storm are reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of communication, in particular to a handover method, device, terminal, source network device and target network device. BACKGROUND

[0002] In a non-terrestrial network (NTN), the main reason for handover is the change of cells caused by satellite movement. Since the current cell will definitely leave, handover will definitely be performed. And the target cell to which the handover is performed can be predicted and determined. This will cause a problem: a large number of terminals (User Equipment, UE) will be handed over from the same NTN cell to the same target cell in a short time. According to the traditional handover mechanism, on the one hand, it will bring a signaling storm, and on the other hand, it will bring a large system overhead. Since the target cell is the same, the configuration information about the target cell is sent to each UE that needs to be handed over through dedicated signaling, causing serious resource waste. SUMMARY

[0003] At least one embodiment of the present disclosure provides a handover method, device, terminal, source network device and target network device, which solves the problems of signaling storm and resource overhead caused by handover in the handover scenario of an NTN network.

[0004] In a first aspect, embodiments of the present disclosure provide a handover method applied to a terminal, the method comprising:

[0005] receiving a cell radio network temporary identifier sent by a source network device, the cell radio network temporary identifier being an identifier allocated to the terminal by a target network device;

[0006] listening to a control channel sent by the target network device according to the cell radio network temporary identifier, the control channel being a control channel scrambled by the cell radio network temporary identifier;

[0007] obtaining a random access resource through the control channel;

[0008] initiating a random access procedure to the target network device or the target network based on the random access resource.

[0009] In some embodiments, listening to the control channel sent by the target network device according to the cell radio network temporary identifier comprises:

[0010] obtaining a first message through the control channel; the first message carrying timing advance information;

[0011] and / or, obtaining a terminal-specific configuration through the control channel; the terminal-specific configuration being a configuration allocated to the terminal by the target network device for use by the terminal.

[0012] In some embodiments, the method further comprises:

[0013] receiving at least one of the following information sent by the source network device and / or the target network device:

[0014] the security parameter, the public configuration information of the target network, and the protocol data unit session related parameter.

[0015] In a second aspect, the embodiments of the present disclosure further provide a handover method, applied to a source network device, the method comprising:

[0016] obtaining a cell radio network temporary identifier of the terminal, the cell radio network temporary identifier being an identifier allocated to the terminal by a target network device;

[0017] sending the cell radio network temporary identifier to the terminal, the cell radio network temporary identifier being used by the terminal to monitor a control channel sent by the target network device, the control channel being a control channel scrambled by the cell radio network temporary identifier.

[0018] In some embodiments, the method further comprises:

[0019] sending a handover request to the target network device or the target network;

[0020] performing signaling interaction related to handover between the target network device; or performing signaling interaction related to handover between the target network device through a core network device.

[0021] In a third aspect, the embodiments of the present disclosure further provide a handover method, applied to a target network device, the method comprising:

[0022] obtaining a cell radio network temporary identifier of the terminal;

[0023] sending the cell radio network temporary identifier to the source network device;

[0024] sending a control channel based on the cell radio network temporary identifier.

[0025] In some embodiments, sending the control channel based on the cell radio network temporary identifier comprises:

[0026] sending a random access resource through the control channel;

[0027] and / or sending a first message through the control channel, the first message carrying timing advance information;

[0028] and / or sending a terminal-specific configuration through the control channel, the terminal-specific configuration being a configuration allocated to the terminal by the target network device for use by the terminal.

[0029] In some embodiments, the method further comprises:

[0030] receiving the handover request sent by the source network device;

[0031] and the source network device related to the signaling interaction of switching; or, and the source network device related to the signaling interaction of switching through the core network device.

[0032] In a fourth aspect, the embodiments of the present disclosure further provide a handover method applied to a terminal, the method comprising:

[0033] listening to a first control channel based on a wireless network temporary identifier dedicated to handover, the first control channel carrying a first cell wireless network temporary identifier, a second cell wireless network temporary identifier, and random access resources; wherein the first cell wireless network temporary identifier is an identifier allocated to the terminal by the source network device, and the second cell wireless network temporary identifier is an identifier allocated to the terminal by the target network device;

[0034] obtaining the random access resources through the first control channel;

[0035] initiating a random access procedure to the target network device or the target network based on the random access resources.

[0036] In some embodiments, the method further comprises:

[0037] listening to a second control channel based on the second cell wireless network temporary identifier.

[0038] In some embodiments, listening to the second control channel based on the second cell wireless network temporary identifier comprises:

[0039] obtaining a first message through the second control channel; the first message carries timing advance information;

[0040] and / or obtaining a terminal-specific configuration through the second control channel; the terminal-specific configuration is a configuration allocated to the terminal by the target network device for use by the terminal.

[0041] In some embodiments, the method further comprises:

[0042] receiving at least one of the following information sent by the source network device and / or the target network device:

[0043] security parameters, public configuration information of the target network, and protocol data unit session related parameters.

[0044] In some embodiments, before listening to the first control channel based on the wireless network temporary identifier dedicated to handover, the method further comprises:

[0045] receiving the wireless network temporary identifier dedicated to handover sent by the source network device.

[0046] In a fifth aspect, the embodiments of the present disclosure further provide a switching method, applied to a source network device, the method comprising:

[0047] sending, to a target network device, a first cell radio network temporary identifier, the first cell radio network temporary identifier being an identifier allocated by the source network device to the terminal.

[0048] In some embodiments, the method further comprises:

[0049] receiving a switching-specific radio network temporary identifier sent by the target network device;

[0050] sending, to the terminal, the switching-specific radio network temporary identifier.

[0051] In a sixth aspect, the embodiments of the present disclosure further provide a switching method, applied to a target network device, the method comprising:

[0052] receiving a first cell radio network temporary identifier sent by a source network device, the first cell radio network temporary identifier being an identifier allocated by the source network device to the terminal;

[0053] sending a first control channel based on a switching-specific radio network temporary identifier, the first control channel carrying the first cell radio network temporary identifier, a second cell radio network temporary identifier and a random access resource; wherein the second cell radio network temporary identifier is an identifier allocated by the target network device to the terminal.

[0054] In some embodiments, the method further comprises:

[0055] sending, to the source network device, the switching-specific radio network temporary identifier.

[0056] In some embodiments, the method further comprises:

[0057] sending a second control channel based on the second cell radio network temporary identifier.

[0058] In some embodiments, the sending the second control channel based on the second cell radio network temporary identifier comprises:

[0059] sending a first message through the second control channel; the first message carrying timing advance information;

[0060] and / or sending a terminal-specific configuration through the second control channel, the terminal-specific configuration being a configuration allocated by the target network device to the terminal for use.

[0061] In a seventh aspect, the embodiments of the present disclosure further provide a switching apparatus, applied to a terminal, the apparatus comprising:

[0062] The receiving unit is configured to receive a cell radio network temporary identifier sent by the source network device, the cell radio network temporary identifier being an identifier allocated to the terminal by the target network device;

[0063] The monitoring unit is configured to monitor a control channel sent by the target network device according to the cell radio network temporary identifier, the control channel being a control channel scrambled by the cell radio network temporary identifier;

[0064] The obtaining unit is configured to obtain a random access resource through the control channel;

[0065] The accessing unit is configured to initiate a random access procedure to the target network device or the target network based on the random access resource.

[0066] In an eighth aspect, the embodiments of the present disclosure further provide a switching device applied to a source network device, the device comprising:

[0067] The obtaining unit is configured to obtain a cell radio network temporary identifier of the terminal, the cell radio network temporary identifier being an identifier allocated to the terminal by the target network device;

[0068] The sending unit is configured to send the cell radio network temporary identifier to the terminal, the cell radio network temporary identifier being used by the terminal to monitor a control channel sent by the target network device, the control channel being a control channel scrambled by the cell radio network temporary identifier.

[0069] In a ninth aspect, the embodiments of the present disclosure further provide a switching device applied to a target network device, the device comprising:

[0070] The obtaining unit is configured to obtain a cell radio network temporary identifier of the terminal;

[0071] The sending unit is configured to send the cell radio network temporary identifier to the source network device, and send a control channel based on the cell radio network temporary identifier.

[0072] In a tenth aspect, the embodiments of the present disclosure further provide a switching device applied to a terminal, the device comprising:

[0073] The monitoring unit is configured to monitor a first control channel based on the switching-specific radio network temporary identifier, the first control channel carrying a first cell radio network temporary identifier, a second cell radio network temporary identifier, and a random access resource; wherein the first cell radio network temporary identifier is an identifier allocated to the terminal by the source network device, and the second cell radio network temporary identifier is an identifier allocated to the terminal by the target network device.

[0074] The obtaining unit is configured to obtain a random access resource through the first control channel;

[0075] The access unit is configured to initiate a random access procedure to the target network device or the target network based on the random access resource.

[0076] In a eleventh aspect, the disclosure also provides a switching device applied to a source network device, the device comprising:

[0077] The sending unit is configured to send a first cell radio network temporary identifier to the target network device, the first cell radio network temporary identifier being an identifier allocated to the terminal by the source network device.

[0078] In a twelfth aspect, the disclosure also provides a switching device applied to a target network device, the device comprising:

[0079] The receiving unit is configured to receive a first cell radio network temporary identifier sent by the source network device, the first cell radio network temporary identifier being an identifier allocated to the terminal by the source network device.

[0080] The sending unit is configured to send a first control channel based on the switching-specific radio network temporary identifier, the first control channel carrying the first cell radio network temporary identifier, a second cell radio network temporary identifier and the random access resource, wherein the second cell radio network temporary identifier is an identifier allocated to the terminal by the target network device.

[0081] In a thirteenth aspect, the disclosure also provides a terminal, wherein the terminal comprises a memory, a transceiver and a processor.

[0082] The memory is configured to store a computer program; the transceiver is configured to transceive data under control of the processor; and the processor is configured to read the computer program in the memory and perform:

[0083] Receive a cell radio network temporary identifier sent by the source network device, the cell radio network temporary identifier being an identifier allocated to the terminal by the target network device.

[0084] Listen to a control channel sent by the target network device according to the cell radio network temporary identifier, the control channel being a control channel scrambled by the cell radio network temporary identifier.

[0085] Obtain a random access resource through the control channel.

[0086] Initiate a random access procedure to the target network device or the target network based on the random access resource.

[0087] In some embodiments, listening to the control channel sent by the target network device according to the cell radio network temporary identifier comprises:

[0088] Obtain a first message through the control channel, the first message carrying timing advance information.

[0089] And / or, the terminal-specific configuration is obtained through the control channel; the terminal-specific configuration is a configuration used by the terminal and allocated by the target network device to the terminal.

[0090] In some embodiments, the processor is further configured to:

[0091] receive at least one of the following information sent by the source network device and / or the target network device:

[0092] the security parameter, the public configuration information of the target network, and the protocol data unit session-related parameter.

[0093] In a fourteenth aspect, the embodiments of the present disclosure further provide a source network device, wherein the source network device comprises a memory, a transceiver, and a processor.

[0094] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform:

[0095] obtain a cell radio network temporary identifier of the terminal, the cell radio network temporary identifier being an identifier allocated by the target network device to the terminal.

[0096] send the cell radio network temporary identifier to the terminal, the cell radio network temporary identifier being used by the terminal to monitor a control channel sent by the target network device, the control channel being a control channel scrambled by the cell radio network temporary identifier.

[0097] In some embodiments, the processor is further configured to:

[0098] send a handover request to the target network device or the target network;

[0099] perform signaling interaction related to handover between the target network device; or perform signaling interaction related to handover between the target network device through a core network device.

[0100] In a fifteenth aspect, the embodiments of the present disclosure further provide a target network device, wherein the target network device comprises a memory, a transceiver, and a processor.

[0101] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform:

[0102] obtain a cell radio network temporary identifier of the terminal.

[0103] send the cell radio network temporary identifier to the source network device.

[0104] send a control channel based on the cell radio network temporary identifier.

[0105] In some embodiments, the control channel is transmitted based on a cell radio network temporary identifier, comprising:

[0106] The random access resource is transmitted through the control channel.

[0107] And / or, the first message is transmitted through the control channel, and the first message carries timing advance information.

[0108] And / or, the terminal-specific configuration is transmitted through the control channel, and the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0109] In some embodiments, the processor is further configured to:

[0110] Receive a handover request transmitted by the source network device.

[0111] And the signaling interaction related to the handover between the source network device; or, the signaling interaction related to the handover between the source network device through the core network device.

[0112] In a sixteenth aspect, the embodiments of the present disclosure further provide a terminal, wherein the terminal comprises a memory, a transceiver, and a processor.

[0113] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform:

[0114] Listen to a first control channel based on a handover-specific radio network temporary identifier, and the first control channel carries a first cell radio network temporary identifier, a second cell radio network temporary identifier, and a random access resource; wherein the first cell radio network temporary identifier is an identifier allocated by the source network device for the terminal, and the second cell radio network temporary identifier is an identifier allocated by the target network device for the terminal.

[0115] Obtain the random access resource through the first control channel.

[0116] Based on the random access resource, initiate a random access procedure to the target network device or the target network.

[0117] In some embodiments, the processor is further configured to:

[0118] Listen to a second control channel based on the second cell radio network temporary identifier.

[0119] In some embodiments, listening to the second control channel based on the second cell radio network temporary identifier comprises:

[0120] Obtain the first message through the second control channel; and the first message carries timing advance information.

[0121] And / or, obtaining the terminal-specific configuration through the second control channel; the terminal-specific configuration is a configuration used by the terminal and allocated by the target network device for the terminal.

[0122] In some embodiments, the processor is further configured to:

[0123] receive at least one of the following information sent by the source network device and / or the target network device:

[0124] the security parameter, the public configuration information of the target network, and the protocol data unit session-related parameter.

[0125] In some embodiments, before listening to the first control channel based on the handover-specific wireless network temporary identifier, the processor is further configured to:

[0126] receive the handover-specific wireless network temporary identifier sent by the source network device.

[0127] In a seventeenth aspect, the embodiments of the present disclosure further provide a source network device, wherein the source network device comprises a memory, a transceiver, and a processor.

[0128] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform:

[0129] send the first cell wireless network temporary identifier to the target network device, the first cell wireless network temporary identifier being an identifier allocated by the source network device for the terminal.

[0130] In some embodiments, the processor is further configured to:

[0131] receive the handover-specific wireless network temporary identifier sent by the target network device;

[0132] send the handover-specific wireless network temporary identifier to the terminal.

[0133] In an eighteenth aspect, the embodiments of the present disclosure further provide a target network device, wherein the target network device comprises a memory, a transceiver, and a processor.

[0134] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform:

[0135] receive the first cell wireless network temporary identifier sent by the source network device, the first cell wireless network temporary identifier being an identifier allocated by the source network device for the terminal.

[0136] The first control channel is sent based on the handover-specific wireless network temporary identifier, and the first control channel carries a first cell wireless network temporary identifier, a second cell wireless network temporary identifier, and random access resources; the second cell wireless network temporary identifier is an identifier allocated to the terminal by the target network device.

[0137] In some embodiments, the processor is further configured to:

[0138] The handover-specific wireless network temporary identifier is sent to the source network device.

[0139] In some embodiments, the processor is further configured to:

[0140] The second control channel is sent based on the second cell wireless network temporary identifier.

[0141] In some embodiments, the second control channel is sent based on the second cell wireless network temporary identifier, including:

[0142] The first message is sent through the second control channel; the first message carries timing advance information;

[0143] And / or, the terminal-specific configuration is sent through the second control channel, and the terminal-specific configuration is a configuration allocated to the terminal by the target network device for the terminal.

[0144] In a nineteenth aspect, the embodiments of the present disclosure further provide a processor-readable storage medium, wherein the processor-readable storage medium stores a program, and the program is configured to cause a processor to perform the handover method according to any one of the first aspect, or perform the handover method according to any one of the second aspect, or perform the handover method according to any one of the third aspect, or perform the handover method according to any one of the fourth aspect, or perform the handover method according to any one of the fifth aspect, or perform the handover method according to any one of the sixth aspect.

[0145] In at least one embodiment of the present disclosure, the terminal listens to the control channel sent by the target network device by receiving the cell wireless network temporary identifier allocated to the terminal by the target network device, and the control channel is a control channel scrambled by the cell wireless network temporary identifier, so that the terminal can obtain the random access resources configured by the target network device for the terminal through the control channel, and complete the random access process with the target network based on the random access resources. The terminal-specific configuration of the terminal in the target network can be sent to the terminal by the target network device after the random access process is completed. Therefore, in the handover process, the terminal-specific configuration of the terminal in the target network does not need to be sent from the target network device to the source network device, which reduces inter-satellite interaction, reduces system overhead, reduces resource waste, and reduces signaling storm. BRIEF DESCRIPTION OF DRAWINGS

[0146] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0147] Figure 1 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0148] Figure 2 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0149] Figure 3 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0150] Figure 4 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0151] Figure 5 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0152] Figure 6 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0153] Figure 7 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0154] Figure 8 A flowchart of a switching method provided by an embodiment of the present disclosure is shown in FIG. 1;

[0155] Figure 9 A schematic diagram of a switching device provided by an embodiment of the present disclosure is shown in FIG. 1;

[0156] Figure 10 A schematic diagram of another switching device provided by an embodiment of the present disclosure is shown in FIG. 1;

[0157] Figure 11 A schematic diagram of another switching device provided by an embodiment of the present disclosure is shown in FIG. 1;

[0158] Figure 12 A schematic diagram of another switching device provided by an embodiment of the present disclosure is shown in FIG. 1;

[0159] Figure 13 A schematic diagram of another switching device provided by an embodiment of the present disclosure is shown in FIG. 1;

[0160] Figure 14 A schematic diagram of another switching device provided by an embodiment of the present disclosure is shown in FIG. 1;

[0161] Figure 15 A terminal provided for an embodiment of the present disclosure;

[0162] Figure 16 A source network device provided for an embodiment of the present disclosure;

[0163] Figure 17 A target network device provided for an embodiment of the present disclosure;

[0164] Figure 18 A terminal provided for an embodiment of the present disclosure;

[0165] Figure 19 A source network device provided for an embodiment of the present disclosure;

[0166] Figure 20 A target network device provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0167] In order to enable a more clearly understanding of the above-mentioned purpose, features and advantages of the present disclosure, the present disclosure will be further described in detail below in combination with the drawings and embodiments. It can be understood that the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. The specific embodiments described herein are only used to explain the present disclosure, but not to limit the present disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of the present disclosure are within the scope of protection of the present disclosure.

[0168] It should be noted that, in this paper, relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.

[0169] In satellite communication, the connection link between the terminal and the satellite is called user link, and the connection link between the satellite and the gateway station is called feeder link. There are two working modes in satellite communication:

[0170] One is transparent forwarding mode, the satellite only transparently forwards the signal without any processing, the terminal and the gateway station communicate, that is, the satellite only performs frequency conversion, wireless signal amplification and other operations on the uplink / downlink signal, and its function is similar to that of radio frequency relay.

[0171] One is regenerative communication mode, the satellite can detect the information of the received signal and process and forward it, complete the function of the base station, connect the terminal and the gateway station. That is, the satellite can perform frequency conversion, wireless signal amplification, coding / modulation, demodulation / decoding and other functions on the uplink / downlink signal. That is, the satellite can have all or part of the functions of the base station, and can regenerate the signal.

[0172] There are two types of cells in NTN:

[0173] Earth-Fixed cell: refers to the ground coverage area of a satellite's serving cell does not change with the movement of the satellite in a certain period of time, that is, in a "staring" mode, the satellite is moving, but in a certain period of time, the satellite "stares" at a certain area on the ground. For example, the satellite moves from T1 time to T2 time, and the satellite's coverage area on the ground is always the same area or approximately the same area. Quasi-Earth Fixed cell refers to an approximate (similar) Earth-Fixed cell, which means that the satellite "stares" at the ground for a relatively short time, that is, T1 and T2 are separated by a short period of time. In this scenario, as the satellite moves, the angle between the satellite antenna and the ground changes, thereby ensuring that the area covered by the satellite antenna does not change or approximately does not change.

[0174] Earth-moving cell: refers to the ground coverage area of a satellite's serving cell changes with the movement of the satellite. For example, the coverage area of the satellite is area A at T1 time and area B at T2 time. In this scenario, as the satellite moves, the angle between the satellite antenna and the ground hardly changes.

[0175] As the satellite moves, whether it is an Earth-Fixed cell or an Earth-moving cell, the cell mapped to the ground will move. If a large number of terminals reside in the NTN cell, because of the movement of the cell, a large number of terminals will perform handover from the same source NTN cell to the same target NTN cell, which will cause a signaling storm in a short period of time.

[0176] In the conventional handover mechanism, the common configuration information of the target cell (especially the information contained in ServingCellConfigCommon) is sent to each terminal participating in the handover through the handover command in the form of dedicated signaling. This handover mechanism is reasonable in the terrestrial network (TN), because in the terrestrial network, handover is mainly caused by the movement of the terminal, and the direction or speed of each terminal movement is unpredictable, so the target cell of each terminal may be different. However, in the NTN network, the main reason for triggering handover is the movement of the satellite cell, which results in a large number of terminals switching to the same target cell. In this case, if the common configuration information of the target cell is sent to each terminal through the handover command, it will cause a waste of resources and low resource efficiency.

[0177] In some related technologies, an unchanged physical cell identifier (PCI) is used, i.e., an unchanged PCI scheme, which assumes that the PCIs of a source cell and a target cell are the same, and the cell configurations are also the same. When handover is performed, the terminal only needs to re-synchronize.

[0178] In some other related technologies, common configuration signaling is used. The main idea of the common configuration signaling mechanism is that the common configuration information of the target cell is sent through broadcasting, and the UE specific configuration, such as a cell radio network temporary identifier (C-RNTI), contention free random access (CFRA) resource, and the like, is still sent to the terminal through a handover command.

[0179] However, the unchanged PCI scheme is not universal, and it cannot always be assumed that the next cell has the same PCI and configuration as the current cell. The common configuration signaling mechanism still needs to exchange a large amount of UE specific configuration between two satellite cells, and resource waste is obvious.

[0180] In the embodiments of the present disclosure, the number of UE specific configurations exchanged between satellites (stations) is reduced, the amount of information of the UE specific configuration of the UE in the target cell sent to the UE by the source station (i.e., the source network device) is reduced, and even the sending of the UE specific configuration of the UE in the target cell to the UE by the source station is avoided, so as to reduce resource overhead. Scheme 1 or scheme 2 can be used:

[0181] Scheme 1: The UE receives the C-RNTI of the UE in the target cell and the security parameter in the target cell from the source station; the UE performs handover to the target cell, listens to the control channel (for example, a physical downlink control channel (PDCCH)) in the target cell through the C-RNTI, obtains random access resources, mainly contention free random access resources, and completes random access in the target cell, and receives the UE specific configuration from the target cell.

[0182] Option 2: The source cell packages the C-RNTI of the UE needing to hand over to the target cell and sends it to the target cell. The target cell scrambles the PDCCH using a handover-specific RNTI (Handover RNTI, HO-RNTI), which carries the UE's C-RNTI from the source cell, a newly allocated C-RNTI from the target cell, and non-contention-based random access resources. The UE listens to the PDCCH in the target cell using the HO-RNTI. If it hears a PDCCH containing its own C-RNTI from the source cell, it uses the C-RNTI from the target cell carried in the PDCCH as its new C-RNTI and initiates non-contention-based random access using the non-contention-based random access resources carried in the PDCCH. Then, it uses the new C-RNTI for subsequent operations. Optionally, the HO-RNTI-scrambled PDCCH can carry multiple UE C-RNTIs (allocated by the target cell) and non-contention-based random access resources to speed up the handover process.

[0183] It should be noted that in Scheme 2, Radio Resource Control (RRC) synchronization and reconfiguration are no longer required. The source cell broadcasts the common configuration of the target cell, and the UE can use the common configuration to complete downlink synchronization with the target cell and receive the PDCCH.

[0184] It should be noted that parts not explicitly described in Schemes 1 and 2 are generally still executed according to the existing process. For example, if data forwarding is to be supported, the source station still needs to support sequence number transfer (SNtransfer), and the target station (i.e., the target network device) can also feed back information about unsupported Protocol Data Unit (PDU) sessions to the source station, etc.

[0185] Figure 1 This is a flowchart illustrating a switching method provided in an embodiment of the present disclosure, which is applied to a terminal. Figure 1 As shown, the switching method may include, but is not limited to, steps 101 and 102:

[0186] In step 101, the temporary identifier of the cell wireless network is received. The temporary identifier of the cell wireless network is an identifier assigned to the terminal by the target network device.

[0187] Wherein, the cell radio network temporary identifier (C-RNTI) is an identifier allocated by the target network device for the terminal (i.e. the terminal that needs to be handed over to the target network). The C-RNTI can also be referred to as the cell radio network temporary identifier of the terminal in the target network. Wherein, the target network is a network defined by the target network device, or a network supported by the target network device, or a target cell to which the target network device belongs.

[0188] In order to distinguish the cell radio network temporary identifiers of the terminal in the source network and the target network, the cell radio network temporary identifier of the terminal in the source network is referred to as the first C-RNTI, and the cell radio network temporary identifier of the terminal in the target network is referred to as the second C-RNTI. Wherein, the source network is a network defined by the source network device, or a network supported by the source network device, or a source cell to which the source network device belongs.

[0189] In this embodiment, the second C-RNTI is sent by the source network device to the terminal. The difference from the related art is that the source network device sends the second C-RNTI to the terminal instead of the terminal specific configuration (UE specific configuration) of the terminal in the target network, i.e. when the source network device sends the second C-RNTI to the terminal, the terminal specific configuration of the terminal in the target network is not carried. Wherein, the terminal specific configuration is a configuration allocated by the target network device for the terminal. It can be seen that the terminal specific configuration does not need to be sent from the target network device to the source network device, reducing inter-satellite interaction, reducing system overhead, reducing resource waste and signaling storm.

[0190] It should be noted that the cell radio network temporary identifier is the concept of the current C-RNTI (Cell RNTI (Radio Network Temporary Identifier, C-RNTI)), which may not be used in the future. As long as it is a temporary identifier (Temporary Identifier) similar to the function of C-RNTI, it is applicable to the embodiments of the present solution.

[0191] In step 102, the control channel sent by the target network device is monitored according to the cell radio network temporary identifier.

[0192] In this embodiment, when the terminal meets the handover condition, the terminal completes downlink synchronization with the target network device, and after completing the downlink synchronization, the terminal listens to the control channel sent by the target network device according to the second C-RNTI, wherein the control channel sent by the target network device is a control channel scrambled by the second C-RNTI, therefore, the terminal can listen to the control channel scrambled by the second C-RNTI using the second C-RNTI, and the listening to the control channel sent by the target network device is realized.

[0193] The control channel can be a physical downlink control channel (PDCCH), or can be another control channel. The control channel carries the random access resource in any one of the following (1) to (3): (1) the control channel can directly carry the random access resource, mainly the non-contention random access resource; or (2) the control channel can carry the scheduling information of a data channel, and the data channel carries the random access resource, mainly the non-contention random access resource; or (3) the control channel can carry the scheduling information of a data channel, and the data channel carries a signaling or data, and the signaling or data carries the random access resource, mainly the non-contention random access resource. It should be noted that the control channel carrying the random access resource mentioned below can be any one of the above three ways.

[0194] The terminal can obtain the random access resource through the control channel. For example, the terminal listens to the control channel according to the second C-RNTI, if the control channel scrambled by the second C-RNTI is listened to, the random access resource carried in the control channel is obtained; or, the data channel scheduled by the control channel (for example, the control channel carries the scheduling information of the data channel, and the data channel is obtained according to the scheduling information) is obtained, and the random access resource carried by the data channel is obtained; or, the data channel scheduled by the control channel is obtained, and the random access resource carried in the signaling or data carried by the data channel is obtained.

[0195] After obtaining the random access resource, the terminal can initiate a random access process to the target network device or the target network based on the random access resource. For example, the terminal initiates a non-contention random access process based on the random access preamble defined by the non-contention random access resource, and / or the random access occasion (RO, RACH occasion), for example, sends a random access preamble on the random access occasion.

[0196] It can be seen that the initiation of the random access process of the terminal in the target network is controlled by listening to the control channel sent by the target cell, therefore, the timing of initiating the random access process is controllable, and the short-term random access resource overhead is reduced.

[0197] It should be noted that, although actually, the base station or the access network device sends the control channel, generally, the source cell or the target cell is described to send the control channel, and in this paper, the source network device or the target network device is described to send the control channel, wherein the source network device belongs to or defines the source cell, and the target network device belongs to or defines the target cell. The source network and the target network can also send the control channel.

[0198] It can be seen that in the embodiment of the disclosure, the terminal receives the cell radio network temporary identifier allocated by the target network device for the terminal, and listens to the control channel sent by the target network device using the cell radio network temporary identifier. The control channel is a control channel scrambled by the cell radio network temporary identifier. Therefore, the terminal can obtain the random access resource and other information configured by the target network device for the terminal through the control channel, so as to complete the random access process with the target network based on the random access resource. The terminal-specific configuration of the terminal in the target network can be sent to the terminal by the target network device after the random access process is completed. Therefore, in the handover process, the terminal-specific configuration of the terminal in the target network does not need to be sent from the target network device to the source network device, reducing inter-satellite interaction, reducing system overhead, reducing resource waste and signaling storm.

[0199] In some embodiments, in step 102, listening to the control channel sent by the target network device according to the cell radio network temporary identifier further includes:

[0200] Obtaining a first message through the control channel; the first message carries timing advance information.

[0201] In this embodiment, the terminal obtains the first message through the control channel based on the second C-RNTI, if the second C-RNTI scrambled control channel is listened to. The first message can be a random access response (Random Access Response, RAR), or can not be RAR, but other messages, signaling or MAC control elements (MAC Control Element, MAC CE) and the like.

[0202] In some embodiments, in step 102, listening to the control channel sent by the target network device according to the cell radio network temporary identifier further includes:

[0203] Obtaining a terminal-specific configuration (UE specific configuration) through the control channel; wherein the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0204] The terminal-specific configuration can be carried in the control channel, or the terminal-specific configuration can not be carried in the control channel.

[0205] If the control channel does not carry terminal-specific configuration, the target network device schedules higher-layer signaling (e.g., RRC reconfiguration information) and / or data through the control channel, carrying the terminal-specific configuration within the higher-layer signaling and / or data. The terminal receives the higher-layer signaling and / or data through the control channel and then obtains the terminal-specific configuration from the higher-layer signaling and / or data. The data includes the MAC CE (Media Access Control Element).

[0206] For example, after the terminal completes non-contention-based random access to the target network device or target network, it receives RRC reconfiguration information sent by the target network device through the control channel, obtains the terminal-specific configuration carried in the RRC reconfiguration information, and completes the handover.

[0207] In some embodiments, Figure 1 The switching method shown also includes Figure 1 The following steps are not shown in the diagram:

[0208] Receive at least one of the following information sent by the source network device and / or the target network device:

[0209] Security parameters, common configuration information of the target network, and Protocol Data Unit (PDU) session-related parameters.

[0210] Among them, security parameters are the security parameters used by the terminal in the target network. The target network is the network defined by the target network device, or the network supported by the target network device, or the target cell to which the target network device belongs. PDU session-related parameters include: indication information of acceptable / unacceptable PDU sessions.

[0211] As an example, the target network's public configuration information is mandatory, while security parameters and PDU session-related parameters are optional.

[0212] Example 1

[0213] The handover process on the terminal (UE) side includes the following steps 1 to 3:

[0214] 1. The UE receives the C-RNTI, necessary security parameters, and common configuration information of the target cell sent by the source cell to the UE. The C-RNTI and security parameters may be sent in unicast form (i.e. via dedicated signaling), and the common configuration information of the target cell may be sent in broadcast or multicast form, which reduces resource overhead.

[0215] 2. When the handover condition is met, the UE completes downlink synchronization with the target cell, listens to the control channel through the C-RNTI allocated by the target cell for the UE, obtains non-contention random access resources, and initiates non-contention random access to the target cell.

[0216] 3. After the UE completes non-contention random access in the target cell, the UE receives RRC reconfiguration information from the target cell, obtains terminal-specific configuration of the UE in the target cell, and completes handover.

[0217] Figure 2 A flowchart of a handover method provided by the embodiment of the disclosure is shown in the figure. The handover method is applied to a source network device, which can be a device of a source cell, a base station of the source cell, or an access network device of the source cell. As shown in the figure, the handover method can include, but is not limited to, steps 201 and 202. Figure 2

[0218] In step 201, a cell radio network temporary identifier of a terminal is obtained. The cell radio network temporary identifier is an identifier allocated by a target network device for the terminal.

[0219] In this embodiment, the source network device obtains a cell radio network temporary identifier C-RNTI of a terminal (i.e., which needs to be handed over to a target cell) from the target network device. The C-RNTI is an identifier allocated by the target network device for the terminal.

[0220] In this embodiment, the source network device does not carry terminal-specific configuration (UE specific configuration) of the terminal in the target network when sending the cell radio network temporary identifier to the terminal. The terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0221] In order to distinguish the cell radio network temporary identifiers of the terminal in the source network and the target network, the cell radio network temporary identifier of the terminal in the source network is referred to as a first C-RNTI, and the cell radio network temporary identifier of the terminal in the target network is referred to as a second C-RNTI.

[0222] In step 202, the cell radio network temporary identifier is sent to the terminal. The cell radio network temporary identifier is used for the terminal to listen to a control channel sent by the target network device.

[0223] In this embodiment, the source network device sends the second C-RNTI to the terminal. For example, the source network device sends the second C-RNTI to the terminal in the form of unicast.

[0224] ​The second C-RNTI is used by the terminal to monitor the control channel scrambled with the second C-RNTI sent by the target network device. For example, the terminal monitors the control channel sent by the target network device based on the second C-RNTI. If it detects a control channel scrambled with the second C-RNTI, it receives the random access resources carried in that control channel. After obtaining the random access resources, the terminal can initiate a random access procedure to the target network device or the target network based on those resources.

[0225] In some embodiments, Figure 2 The switching method shown also includes Figure 2 The following steps are not shown in the diagram:

[0226] Send a handover request to the target network device or target network.

[0227] In this embodiment, if the source network device triggers a handover, it sends a handover request to the target network device or the target network. The timing or conditions for triggering the handover can follow relevant technologies; for example, the source network device triggers the handover when it determines that its coverage area will change.

[0228] In this embodiment, after the source network device sends a handover request to the target network device or the target network, the source network device and the target network device perform handover-related signaling interactions; or, the source network device and the target network device perform handover-related signaling interactions through the core network device.

[0229] For example, if there is an interface between the source network device and the target network device, the source network device and the target network device can directly perform handover-related signaling exchanges; otherwise, the source network device and the target network device can complete the handover-related signaling exchanges through the core network device.

[0230] In some embodiments, Figure 2 The switching method shown also includes Figure 2 The following steps are not shown in the diagram:

[0231] Send at least one of the following messages to the terminal:

[0232] Security parameters, public configuration information of the target network, and PDU session-related parameters.

[0233] Among them, security parameters are the security parameters used by the terminal in the target network. The target network is the network defined by the target network device, or the network supported by the target network device, or the target cell to which the target network device belongs. PDU session-related parameters include: indication information of acceptable / unacceptable PDU sessions.

[0234] As an example, the target network's public configuration information is mandatory, while security parameters and PDU session-related parameters are optional.

[0235] As an example, security parameters are sent in unicast, while public configuration information of the target network is sent in broadcast or multicast.

[0236] Example 2

[0237] The handover process on the network side (source network device) includes the following steps 1 and 2:

[0238] 1. The source network device obtains from the target network device the C-RNTI assigned to the UE (the UE that needs to be switched to the target cell) in the target cell, necessary security parameters (optional), and common configuration information of the target cell.

[0239] The target cell is either the cell to which the target network device belongs, or a cell defined or supported by the target network device.

[0240] Optionally, the source network device can also obtain PDU session-related parameters from the target network device, such as indications of whether PDU sessions are acceptable or unacceptable.

[0241] The source network device needs to trigger a switchover.

[0242] 2. The source network device sends the C-RNTI allocated in the target cell, necessary security parameters, and common configuration information of the target cell to the UE. The C-RNTI and security parameters may be sent via unicast, while the common configuration information of the target cell may be sent via broadcast or multicast.

[0243] Figure 3 This is a flowchart illustrating a handover method provided in an embodiment of the present disclosure. The handover method is applied to a target network device, such as... Figure 3 As shown, the switching method includes, but is not limited to, steps 301 and 302:

[0244] In step 301, the temporary identifier of the terminal's cell wireless network is obtained.

[0245] One method of acquisition is, for example, assigning a temporary cell radio network identifier (C-RNTI) to the terminal that needs to switch to the target network.

[0246] In this embodiment, after the target network device assigns a temporary identifier for the cell wireless network to the terminal, it can send a control channel based on the temporary identifier for the cell wireless network.

[0247] The sending of the control channel based on the cell radio network temporary identifier includes sending a random access resource through the control channel. The random access resource is, for example, a non-contention random access resource.

[0248] The target network device sends the control channel based on the cell radio network temporary identifier, including sending a random access resource through the control channel. The random access resource is, for example, a non-contention random access resource.

[0249] To distinguish the cell radio network temporary identifiers of the terminal in the source network and the target network, the cell radio network temporary identifier of the terminal in the source network is referred to as a first C-RNTI, and the cell radio network temporary identifier of the terminal in the target network is referred to as a second C-RNTI.

[0250] In step 302, the cell radio network temporary identifier is sent to the source network device, and the cell radio network temporary identifier is used by the terminal to listen to the control channel sent by the target network device.

[0251] In this embodiment, when the target network device sends the second C-RNTI to the source network device, the terminal specific configuration (UE specific configuration) of the terminal in the target network is not carried. The terminal specific configuration is the configuration used by the terminal allocated by the target network device to the terminal.

[0252] In this embodiment, after the target network device sends the second C-RNTI to the source network device, the source network device sends the second C-RNTI to the terminal. For example, the source network device sends the second C-RNTI to the terminal in the form of unicast.

[0253] The second C-RNTI is used by the terminal to listen to the control channel scrambled by the second C-RNTI sent by the target network device. For example, the terminal listens to the control channel based on the second C-RNTI, and if the control channel scrambled by the second C-RNTI is listened to, the terminal receives the random access resource carried in the control channel. After obtaining the random access resource, the terminal can initiate a random access process to the target network device or the target network based on the random access resource.

[0254] In some embodiments, the target network device sends the control channel based on the cell radio network temporary identifier, and further includes sending a first message through the control channel, and the first message carries timing advance information.

[0255] The first message can be a random access response (RAR), or can not be an RAR, but other messages, signaling, or MAC control elements (MAC CEs), etc.

[0256] In some embodiments, the target network device sends the control channel based on the cell radio network temporary identifier, and the method further includes:

[0257] sending a terminal specific configuration through the control channel, the terminal specific configuration being a configuration allocated by the target network device for the terminal.

[0258] The control channel can or can not carry the terminal specific configuration.

[0259] If the control channel does not carry the terminal specific configuration, the target network device schedules high layer signaling (for example, RRC reconfiguration information) and / or data through the control channel, and carries the terminal specific configuration in the high layer signaling and / or data. The terminal receives the high layer signaling and / or data through the control channel, and then obtains the terminal specific configuration from the high layer signaling and / or data. The data includes a MAC CE (Media Access Control Control Element).

[0260] For example, after the terminal completes the non-contention random access to the target network device or the target network, the terminal receives the RRC reconfiguration information sent by the target network device through the control channel, obtains the terminal specific configuration carried in the RRC reconfiguration information, and completes the handover.

[0261] In some embodiments, Figure 3 The handover method further includes Figure 3 the following steps not shown in the method:

[0262] receiving a handover request sent by the source network device.

[0263] In this embodiment, if the source network device triggers the handover, the source network device sends a handover request to the target network device or the target network. The timing or condition of triggering the handover can be used in related technologies, for example, the source network device determines that its coverage will change, and triggers the handover.

[0264] In this embodiment, after the target network device receives the handover request sent by the source network device, the source network device and the target network device perform signaling interaction related to the handover; or the source network device and the target network device perform signaling interaction related to the handover through a core network device.

[0265] For example, if there is an interface between the source network device and the target network device, the source network device and the target network device can directly perform signaling interaction related to the handover; otherwise, the source network device and the target network device can complete the signaling interaction related to the handover through the core network device.

[0266] In some embodiments, Figure 3 The switching method shown also includes Figure 3 The following steps are not shown in the method:

[0267] The terminal is sent at least one of the following information:

[0268] Security parameters, public configuration information of the target network, PDU session related parameters.

[0269] The security parameters are the security parameters used by the terminal in the target network. The target network is a network defined by the target network device, or a network supported by the target network device, or a target cell to which the target network device belongs. The PDU session related parameters include indication information of acceptable / unacceptable PDU sessions.

[0270] As an example, the public configuration information of the target network is mandatory information, and the security parameters and the PDU session related parameters are optional information.

[0271] As an example, the security parameters are sent in the form of unicast, and the public configuration information of the target network is sent in the form of broadcast or multicast.

[0272] Embodiment three

[0273] The network side (target network device) switching process includes the following steps 1 to 4:

[0274] 1. The target network device sends the C-RNTI allocated by the target cell to the UE (UE that needs to be switched to the target cell) to the source network device, the necessary security parameters (optional), and the public configuration of the target cell.

[0275] The target cell is a cell to which the target network device belongs, or a cell defined or supported by the target network device.

[0276] Optionally, the target network device can also send PDU session related parameters such as indication information of acceptable / unacceptable PDU sessions to the source network device

[0277] The target network device needs to receive the switching request of the source network device. If there is an interface between the source network device and the target network device, the source network device and the target network device can directly interact with each other in the signaling related to switching; otherwise, the source network device and the target network device can complete the signaling interaction related to switching through the core network device.

[0278] The conditions or occasions for the source network device to trigger switching can refer to related technologies, such as the source network device determining that its coverage will change, triggering switching.

[0279] 2. The target network device sends a control channel to the UE with the C-RNTI of the UE in the target cell, and the control channel carries the non-contention random access resource.

[0280] 3. The target network device completes the non-contention random access procedure with the UE.

[0281] 4. The target network device sends RRC reconfiguration information to the UE, and the RRC reconfiguration information carries the terminal-specific configuration.

[0282] Embodiment Four

[0283] Figure 4 A switching flowchart provided by the embodiments of the present disclosure is shown in FIG. 1. The switching flowchart includes the following steps 1 to 4. Figure 4

[0284] 1. The source network device obtains the C-RNTI of the UE (the UE that needs to be switched to the target cell) allocated in the target cell, the necessary security parameters (optional), and the public configuration information of the target cell from the target network device.

[0285] Optionally, PDU session related parameters such as the indication information of acceptable / unacceptable PDU session can also be included.

[0286] The source network device needs to trigger the switching and request the switching from the target network device. If there is an interface between the source network device and the target network device, the source network device and the target network device can directly perform the signaling interaction related to the switching; otherwise, the source network device and the target network device can complete the signaling interaction related to the switching through the core network device.

[0287] The condition or occasion for the source network device to trigger the switching can refer to the related art, such as the source network device determining that its coverage will change, and triggering the switching.

[0288] 2. The source network device sends the C-RNTI allocated in the target cell, the necessary security parameters (optional), and the public configuration information of the target cell to the UE. The C-RNTI and the security parameters can be sent in the form of unicast, and the public configuration information of the target cell can be sent in the form of broadcast or multicast.

[0289] ​3. The UE obtains the C-RNTI, security parameters, and common configuration information of the target cell allocated to the UE. When the handover conditions are met, the UE completes downlink synchronization with the target cell and uses the C-RNTI allocated to it by the target cell to listen to the control channel (PDCCH) to obtain non-contention random access resources. Then, it initiates non-contention random access to the target cell through the non-contention physical random access channel (PRACH).

[0290] 4. After the UE completes non-contention-based random access in the target cell, it receives RRC reconfiguration information from the target cell, obtains the UE's terminal-specific configuration in the target cell, and completes the handover.

[0291] Figure 5 This is a flowchart illustrating a switching method provided in an embodiment of the present disclosure, which is applied to a terminal. Figure 1 As shown, the switching method may include, but is not limited to, step 501:

[0292] In step 501, the first control channel is monitored based on the handover-dedicated temporary wireless network identifier. The first control channel carries a first cell temporary wireless network identifier, a second cell temporary wireless network identifier, and random access resources. The first cell temporary wireless network identifier is an identifier assigned to the terminal by the source network device, and the second cell temporary wireless network identifier is an identifier assigned to the terminal by the target network device.

[0293] The temporary identifier for switching to a dedicated wireless network can be a predefined identifier in the protocol.

[0294] The first control channel may or may not carry the UE-specific configuration of the terminal in the target network. The UE-specific configuration is the configuration assigned to the terminal by the target network device. The first control channel is sent by the target network device and is scrambled with a handover-specific radio network temporary identifier. It should be noted that while the first control channel can carry the UE-specific configuration of the terminal in the target network, this approach is not ideal. Because the target network device is unsure whether the terminal has already switched to the target network when sending the first control channel, sending the UE-specific configuration via the first control channel could result in resource waste if the terminal has not yet switched. Alternatively, to reduce communication latency, the first control channel may also carry the UE-specific configuration of the terminal in the target network. In this case, the terminal can obtain the radio network temporary identifier and UE-specific configuration used by the terminal in the target network through the first control channel.

[0295] For example, the terminal, based on the handover-specific radio network temporary identifier, if it monitors the first control channel scrambled by the handover-specific radio network temporary identifier, acquires the first cell radio network temporary identifier (first C-RNTI) carried in the first control channel.

[0296] After the terminal acquires the first C-RNTI, it compares the first C-RNTI with its C-RNTI in the source cell, and if they are the same, it acquires the second cell radio network temporary identifier (second C-RNTI) and the random access resource carried in the first control channel, and takes the acquired second C-RNTI as the C-RNTI used by the terminal in the target network.

[0297] After the terminal acquires the random access resource, it initiates a random access procedure to the target network device or the target network based on the random access resource.

[0298] For example, the terminal initiates a non-contention random access procedure based on the random access preamble defined by the non-contention random access resource and / or the random access occasion (RO, RACH occasion), for example, sends a random access preamble on the random access occasion.

[0299] Therefore, in the handover process, the terminal-specific configuration of the target network does not need to be sent from the target network device to the source network device, reducing inter-satellite interaction, reducing system overhead, reducing resource waste and signaling storm.

[0300] In some embodiments, in step 501, monitoring the first control channel based on the handover-specific radio network temporary identifier includes Figure 5 The following steps 1 and 2 are not shown in the figure:

[0301] Step 1, acquiring the second cell radio network temporary identifier through the first control channel.

[0302] Step 2, monitoring the second control channel based on the second cell radio network temporary identifier.

[0303] In this embodiment, since the second cell radio network temporary identifier (second C-RNTI) is carried in the first control channel, the terminal can acquire the second C-RNTI through the first control channel, and then monitor the second control channel based on the second C-RNTI. The second control channel is sent by the target network device, and the second control channel is a control channel scrambled by the second C-RNTI.

[0304] In some embodiments, in step 2, monitoring the second control channel based on the second cell radio network temporary identifier includes:

[0305] Acquiring a first message through the second control channel; the first message carries timing advance information.

[0306] In this embodiment, the terminal obtains the first message through the second control channel based on the second C-RNTI if the terminal monitors the second control channel scrambled by the second C-RNTI. The first message can be a random access response (RAR), or can not be an RAR, but other messages, signaling, or a MAC control element (MAC CE), etc.

[0307] In some embodiments, in step 2, the monitoring of the second control channel based on the second cell radio network temporary identifier further includes:

[0308] obtaining a terminal-specific configuration through the second control channel; the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0309] The second control channel can carry the terminal-specific configuration, or can not carry the terminal-specific configuration.

[0310] If the second control channel does not carry the terminal-specific configuration, the target network device schedules high-layer signaling (such as RRC reconfiguration information) and / or data through the control channel, and carries the terminal-specific configuration in the high-layer signaling and / or data. The terminal receives the high-layer signaling and / or data through the second control channel, and then obtains the terminal-specific configuration from the high-layer signaling and / or data. The data includes a MAC CE (Media Access Control Control Element).

[0311] For example, after the terminal completes the non-contention random access in the target network device or the target network, the terminal receives the RRC reconfiguration information sent by the target network device through the second control channel, obtains the terminal-specific configuration carried in the RRC reconfiguration information, and completes the handover.

[0312] In some embodiments, Figure 5 The illustrated handover method further includes Figure 5 the following steps not shown in the method:

[0313] receiving at least one of the following information sent by the source network device and / or the target network device:

[0314] security parameters, public configuration information of the target network, and PDU session-related parameters.

[0315] The security parameter is a security parameter used by the terminal in the target network. The target network is a network defined by the target network device, or a network supported by the target network device, or a target cell to which the target network device belongs. The PDU session related parameter includes indication information of acceptable / unacceptable PDU session.

[0316] As an example, the common configuration information of the target network is mandatory information, and the security parameter and the PDU session related parameter are optional information.

[0317] In some embodiments, in step 501, the first control channel is listened to based on the handover-specific wireless network temporary identifier before Figure 5 The handover method also includes Figure 5 The following steps are not shown in the figure:

[0318] The handover-specific wireless network temporary identifier sent by the source network device is received.

[0319] In this embodiment, the handover-specific wireless network temporary identifier (denoted as HO-RNTI) is not a protocol predefined identifier, but an identifier sent by the source network device.

[0320] It should be noted that the HO-RNTI is sent by the target network device to the source network device, and then sent by the source network device to the terminal.

[0321] Embodiment five

[0322] The flow of the terminal (UE) side handover includes the following steps 1 to 4:

[0323] 1. The UE receives the common configuration information of the target cell sent by the source cell (broadcast or multicast), and the UE receives the security parameter of the target cell (sent by dedicated signaling).

[0324] 2. After the UE receives the common configuration information of the target cell, at a determined handover time point or based on the location, the UE switches to the target cell, mainly to complete the downlink synchronization with the target cell, complete the control channel reception configuration in the target cell, and then listen to the first control channel (PDCCH) sent by the target cell through the HO-RNTI.

[0325] 3. If the PDCCH monitored by the UE contains its own temporary cell radio network identifier (denoted as C-RNTI-s) in the source cell, then the UE will use the temporary cell radio network identifier (denoted as C-RNTI-t) of the target cell contained in the PDCCH as its own temporary cell radio network identifier in the target cell, and use the non-contention random access resources contained in the PDCCH to initiate non-contention random access, thereby obtaining timing advance (TA) information, and using the TA information to complete uplink synchronization with the target cell.

[0326] 4. After the UE completes non-contention random access in the target cell, it receives RRC reconfiguration information from the target cell, obtains the UE's terminal-specific configuration in the target cell, completes the reconfiguration of the UE in the target cell, and realizes the handover.

[0327] Figure 6 This is a flowchart illustrating a handover method provided in an embodiment of this disclosure. The handover method is applied to a source network device, which can be a device in the source cell, a base station in the source cell, or an access network device in the source cell. Figure 6 As shown, the switching method may include, but is not limited to, step 601:

[0328] Send the temporary identifier of the first cell wireless network to the target network device. The temporary identifier of the first cell wireless network is the identifier assigned to the terminal by the source network device.

[0329] In this embodiment, the source network device sends the first cell radio network temporary identifier (first C-RNTI) of the terminal that needs to be switched to the target cell to the target network device.

[0330] After receiving the first C-RNTI, the target network device can send a first control channel to the terminal. The first control channel carries the first C-RNTI, the second cell radio network temporary identifier (second C-RNTI), and random access resources. The second C-RNTI is an identifier assigned to the terminal by the target network device.

[0331] The first control channel sent by the target network device to the terminal may not carry the terminal's UE-specific configuration on the target network. The UE-specific configuration is the configuration assigned to the terminal by the target network device for terminal use.

[0332] In some embodiments, Figure 6 The switching method shown also includes Figure 6 Steps 1 and 2, which are not shown in the diagram, are as follows:

[0333] Step 1: Receive the temporary identifier for the dedicated wireless network sent by the target network device;

[0334] Step 2: sending a handover-specific radio network temporary identifier to the terminal.

[0335] The handover-specific radio network temporary identifier (denoted as HO-RNTI) is generated by the target network device, and the HO-RNTI is used by the terminal to monitor the first control channel sent by the target network device.

[0336] For example, based on the HO-RNTI, if the terminal monitors the first control channel scrambled by the HO-RNTI, the terminal acquires a first C-RNTI carried in the first control channel, compares the first C-RNTI with the C-RNTI of the terminal in the source cell, and if the two are the same, acquires a second cell radio network temporary identifier (second C-RNTI) and a random access resource carried in the first control channel. After the terminal acquires the random access resource, the terminal initiates a random access procedure to the target network device or the target network based on the random access resource.

[0337] In some embodiments, Figure 6 The illustrated handover method further includes Figure 6 The following steps are not shown in the method:

[0338] The terminal is sent at least one of the following information:

[0339] Security parameters and public configuration information of the target network.

[0340] The security parameters are security parameters used by the terminal in the target network. The target network is a network defined by the target network device, or a network supported by the target network device, or a target cell to which the target network device belongs.

[0341] As an example, the security parameters are sent in the form of unicast, and the public configuration information of the target network is sent in the form of broadcast or multicast.

[0342] Embodiment six

[0343] The flow of the network side (source network device) for handover includes the following steps 1 to 3:

[0344] 1. The source network device determines the target network device, and the determination process is not the focus of this embodiment. The source network device can determine the target cell covering the current area of the source cell according to the ephemeris information. The source network device can also determine the data radio bearer (DRB) configuration information of the UE in the source cell.

[0345] 2. The source network device sends the temporary cell radio network identifier (denoted as C-RNTI-s) of the UE that needs to be switched to the target cell to the determined target network device, and obtains the public configuration information, necessary security parameters, PDU session-related parameters, etc. of the target cell from the target cell.

[0346] 3. The source network device broadcasts the obtained public configuration information of the target cell to the source cell and sends security parameters to the UE via dedicated signaling.

[0347] Figure 7 This is a flowchart illustrating a handover method provided in an embodiment of the present disclosure. The handover method is applied to a target network device, such as... Figure 7 As shown, the switching method includes, but is not limited to, step 701:

[0348] In step 701, the terminal receives a first cell wireless network temporary identifier sent by the source network device. The first cell wireless network temporary identifier is an identifier assigned to the terminal by the source network device.

[0349] In this embodiment, the target network device receives the first cell radio network temporary identifier (first C-RNTI) of the terminal that needs to switch to the target cell, sent by the source network device.

[0350] After receiving the first C-RNTI, the target network device sends a first control channel based on the handover-specific radio network temporary identifier (denoted as HO-RNTI). The first control channel carries the first cell radio network temporary identifier (first C-RNTI), the second cell radio network temporary identifier (second C-RNTI), and random access resources.

[0351] Here, the HO-RNTI can be a predefined identifier by the protocol. The second C-RNTI is an identifier assigned to the terminal by the target network device.

[0352] The first control channel may not carry the UE-specific configuration of the terminal in the target network. The UE-specific configuration is the configuration assigned to the terminal by the target network device. The first control channel is sent by the target network device and is a control channel scrambled using HO-RNTI.

[0353] Optionally, the first control channel carries a first cell wireless network temporary identifier, a second cell wireless network temporary identifier, and random access resources corresponding to multiple terminals respectively.

[0354] In some embodiments, after receiving the first cell radio network temporary identifier sent by the source network device in step 701... Figure 7 The switching method shown also includesFigure 7 The following steps are not shown in the embodiment:

[0355] sending the handover-specific radio network temporary identifier to the source network device.

[0356] In the embodiment, after receiving the first cell radio network temporary identifier (first C-RNTI), the target network device sends the handover-specific radio network temporary identifier (denoted as HO-RNTI) to the source network device. The HO-RNTI is generated by the target network device and sent to the terminal by the source network device.

[0357] In some embodiments, after receiving the first cell radio network temporary identifier sent by the source network device in step 701, Figure 7 The handover method shown further includes Figure 7 The following steps are not shown in the embodiment:

[0358] sending the second control channel based on the second cell radio network temporary identifier.

[0359] For example, the target network device uses the second cell radio network temporary identifier (second C-RNTI) to scramble the second control channel, and then sends the scrambled second control channel.

[0360] In some embodiments, the target network device sends the second control channel based on the second cell radio network temporary identifier, including:

[0361] sending a first message through the second control channel; the first message carries timing advance information.

[0362] The first message can be a random access response (RAR), or can not be an RAR, but other messages, signaling or MAC control elements (MAC CEs), etc.

[0363] In some embodiments, the target network device sends the second control channel based on the second cell radio network temporary identifier, further including:

[0364] sending a terminal-specific configuration (UE specific configuration) through the second control channel; the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0365] The second control channel can or can not carry the terminal-specific configuration.

[0366] If the second control channel does not carry terminal-specific configuration, the target network device schedules higher-layer signaling (e.g., RRC reconfiguration information) and / or data through the control channel, carrying the terminal-specific configuration in the higher-layer signaling and / or data. The terminal receives the higher-layer signaling and / or data through the second control channel, and then obtains the terminal-specific configuration from the higher-layer signaling and / or data. The data includes MAC CE (Media Access Control Element).

[0367] For example, after the terminal completes non-contention-based random access to the target network device or target network, it receives RRC reconfiguration information sent by the target network device through the second control channel, obtains the terminal-specific configuration carried in the RRC reconfiguration information, and completes the handover.

[0368] In some embodiments, Figure 7 The switching method shown also includes Figure 7 The following steps are not shown in the diagram:

[0369] Send at least one of the following messages to the source network device:

[0370] Security parameters, public configuration information of the target network, and PDU session-related parameters.

[0371] Among them, security parameters are the security parameters used by the terminal in the target network. The target network is the network defined by the target network device, or the network supported by the target network device, or the target cell to which the target network device belongs. PDU session-related parameters include: indication information of acceptable / unacceptable PDU sessions.

[0372] As an example, the target network's public configuration information is mandatory, while security parameters and PDU session-related parameters are optional.

[0373] As an example, security parameters are sent in unicast, while public configuration information of the target network is sent in broadcast or multicast.

[0374] Example 7

[0375] The handover process on the network side (target network device) includes the following steps 1 to 4:

[0376] 1. The target network device receives the temporary cell radio network identifier (denoted as C-RNTI-s) of the UE in the source cell that needs to switch to the target cell from the source network device, and sends the common configuration information of the target cell, necessary security parameters, PDU session-related parameters, etc. to the source network device.

[0377] 2. The target network device sends a first control channel based on the HO-RNTI, and the first control channel carries a C-RNTI-s of the UE in the source cell, a C-RNTI-t of the UE in the target cell, and non-contention random access resources.

[0378] The time of sending the first control channel is based on a base station implementation, for example, the base station determines to send the first control channel when it covers the location where the UE is located.

[0379] 3. The target network device completes a random access procedure with the UE.

[0380] 4. The target network device sends RRC reconfiguration information to the UE, and the RRC reconfiguration information carries terminal-specific configuration.

[0381] Embodiment eight

[0382] Figure 8 A handover flowchart provided by the embodiments of the present disclosure is shown in FIG. 1, and the handover flowchart includes the following steps 1 to 6. Figure 8

[0383] 1. The source network device determines a target network device, and the determination process is not the focus of the present embodiment. The source network device can determine a target cell covering the current area of the source cell according to ephemeris information. The source network device can also determine data radio bearer (DRB) configuration information of the UE in the source cell.

[0384] 2. The source network device sends a cell radio network temporary identifier (C-RNTI-s) of the UE in the source cell to the determined target network device, and obtains public configuration information of the target cell, necessary security parameters, PDU session related parameters, etc. from the target cell.

[0385] 3. The source network device sends the obtained public configuration information of the target cell in the source cell through broadcasting, and sends the security parameters to the UE through dedicated signaling.

[0386] 4. After the UE receives the public configuration information of the target cell, the UE switches to the target cell at a determined handover time point or based on a location, mainly to complete downlink synchronization with the target cell, complete control channel reception configuration in the target cell, and then listen to a first control channel (PDCCH) sent by the target cell through the HO-RNTI.

[0387] ​5. If the PDCCH monitored by the UE contains the C-RNTI-s of the UE in the source cell, the UE takes the cell radio network temporary identifier (denoted as C-RNTI-t) of the target cell contained in the PDCCH as the cell radio network temporary identifier of the UE in the target cell, uses the non-contention random access resource contained in the PDCCH, and initiates a non-contention random access through a non-contention physical random access channel (PRACH), thereby obtaining timing advance (TA) information and completing uplink synchronization to the target cell by using the TA information.

[0388] 6. After the UE completes the non-contention random access in the target cell, the UE receives RRC reconfiguration information from the target cell, obtains the terminal-specific configuration of the UE in the target cell, completes reconfiguration of the UE by the target cell, and implements the handover.

[0389] It should be noted that, for the foregoing method embodiments, in order to simply describe, they are all described as a series of action combinations, but those skilled in the art can understand that the disclosure embodiments are not limited to the action sequence described, because according to the disclosure embodiments, certain steps can be performed in other sequences or simultaneously. In addition, those skilled in the art can understand that the embodiments described in the specification all belong to optional embodiments.

[0390] Figure 9 A schematic diagram of a handover device provided by the disclosure is shown in the figure, and the handover device is applied to a terminal, as shown in the figure, the handover device includes but is not limited to a receiving unit 91 and a monitoring unit 92, and specific descriptions are as follows: Figure 9

[0391] The receiving unit 91 is configured to receive a cell radio network temporary identifier sent by a source network device, and the cell radio network temporary identifier is an identifier allocated by a target network device for the terminal;

[0392] The monitoring unit 92 is configured to monitor a control channel sent by the target network device according to the cell radio network temporary identifier, and the control channel is a control channel scrambled by the cell radio network temporary identifier.

[0393] In some embodiments, the handover device further includes:

[0394] The obtaining unit is configured to obtain a random access resource through the control channel;

[0395] The access unit is configured to initiate a random access process to the target network device or the target network based on the random access resource.

[0396] In some embodiments, the monitoring unit 92 further includes: ​

[0397] obtaining a first message through a control channel; the first message carries timing advance information.

[0398] In some embodiments, the listening unit 92 further includes:

[0399] obtaining a terminal-specific configuration through a control channel; the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0400] In some embodiments, the receiving unit 91 is further configured to:

[0401] receiving at least one of the following information sent by the source network device and / or the target network device:

[0402] security parameters, public configuration information of the target network, and protocol data unit session-related parameters.

[0403] Figure 9 Details of each embodiment of the switching device shown can be found in Figure 1 Each embodiment of the switching method shown will not be described again to avoid repetition.

[0404] Figure 10 Another schematic diagram of a switching device provided by an embodiment of the present disclosure is shown. The switching device is applied to a source network device. As shown in the figure, Figure 10 The switching device includes but is not limited to an obtaining unit 1001 and a sending unit 1002, which are specifically described as follows:

[0405] The obtaining unit 1001 is configured to obtain a cell radio network temporary identifier of a terminal, the cell radio network temporary identifier being an identifier allocated by a target network device for the terminal.

[0406] The sending unit 1002 is configured to send the cell radio network temporary identifier to the terminal, the cell radio network temporary identifier being used by the terminal to listen to a control channel sent by the target network device, the control channel being a control channel scrambled by the cell radio network temporary identifier.

[0407] In some embodiments, the sending unit 1002 is further configured to:

[0408] send a switching request to the target network device or the target network.

[0409] In some embodiments, the switching device further includes an interaction unit configured to:

[0410] After the sending unit 1002 sends the switching request to the target network device or the target network, perform signaling interaction related to switching between the target network device; or, perform signaling interaction related to switching between the target network device through a core network device.

[0411] In some embodiments, the sending unit 1002 is further configured to:

[0412] send at least one of the following information to the terminal:

[0413] a security parameter, public configuration information of the target network, and a protocol data unit session related parameter.

[0414] In some embodiments, the obtaining unit 1001 is configured to:

[0415] receive a cell radio network temporary identifier of the terminal sent by the target network device.

[0416] Figure 10 Details of each embodiment of the switching device shown can be found in Figure 2 Each embodiment of the switching method shown will not be described again to avoid repetition.

[0417] Figure 11 Another switching device is provided for the embodiments of the present disclosure, which is applied to a target network device. As shown in Figure 11 The switching device includes but is not limited to an obtaining unit 1001 and a sending unit 1002, which are specifically described as follows:

[0418] The obtaining unit 1101 is configured to obtain a cell radio network temporary identifier of a terminal.

[0419] The sending unit 1102 is configured to send the cell radio network temporary identifier to a source network device, and the cell radio network temporary identifier is used by the terminal to monitor a control channel sent by the target network device.

[0420] In some embodiments, the sending unit 1102 is further configured to:

[0421] After the obtaining unit 1101 obtains the cell radio network temporary identifier of the terminal, the control channel is sent based on the cell radio network temporary identifier.

[0422] In some embodiments, the sending unit 1102 sends the control channel based on the cell radio network temporary identifier, including:

[0423] The random access resource is sent through the control channel.

[0424] In some embodiments, the sending unit 1102 sends the control channel based on the cell radio network temporary identifier, further including:

[0425] The first message carrying the timing advance information is sent through the control channel.

[0426] In some embodiments, the sending unit 1102 sends the control channel based on the cell radio network temporary identifier, further including:

[0427] The terminal-specific configuration is a configuration used by the terminal allocated by the target network device for the terminal.

[0428] In some embodiments, the switching apparatus further includes a receiving unit, configured to:

[0429] receive the switching request sent by the source network device.

[0430] In some embodiments, the switching apparatus further includes an interacting unit, configured to:

[0431] after the receiving unit receives the switching request sent by the source network device, perform signaling interaction related to switching between the target network device; or, perform signaling interaction related to switching between the target network device through a core network device.

[0432] In some embodiments, the sending unit 1102 is further configured to:

[0433] send at least one of the following information to the terminal:

[0434] a security parameter, public configuration information of the target network, and a protocol data unit session-related parameter.

[0435] Figure 11 Details of each embodiment of the switching apparatus shown can be referred to in Figure 3 Each embodiment of the switching method shown will not be described again to avoid repetition.

[0436] Figure 12 Another switching apparatus provided by the embodiments of the present disclosure is shown in a schematic diagram. The switching apparatus is applied to a terminal. As shown in the figure, Figure 12 The switching apparatus includes but is not limited to a listening unit 1201, which is specifically described as follows:

[0437] The listening unit 1201 is configured to listen to a first control channel based on a switching-specific wireless network temporary identifier. The first control channel carries a first cell wireless network temporary identifier, a second cell wireless network temporary identifier, and a random access resource. The first cell wireless network temporary identifier is an identifier allocated by the source network device for the terminal, and the second cell wireless network temporary identifier is an identifier allocated by the target network device for the terminal.

[0438] In some embodiments, the switching apparatus further includes:

[0439] The obtaining unit is configured to obtain the random access resource through the first control channel.

[0440] The access unit is configured to initiate a random access process to the target network device or the target network based on the random access resource.

[0441] In some embodiments, the obtaining unit is further configured to: obtain the second cell radio network temporary identifier through the first control channel.

[0442] The monitoring unit 1201 is further configured to monitor the second control channel based on the second cell radio network temporary identifier.

[0443] In some embodiments, the monitoring unit 1201 monitors the second control channel based on the second cell radio network temporary identifier, including:

[0444] obtains the first message through the second control channel; the first message carries the timing advance information.

[0445] In some embodiments, the monitoring unit 1201 monitors the second control channel based on the second cell radio network temporary identifier, further including:

[0446] obtains the terminal-specific configuration through the second control channel; the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0447] In some embodiments, the switching apparatus further includes a first receiving unit configured to:

[0448] receive at least one of the following information sent by the source network device and / or the target network device:

[0449] security parameters, public configuration information of the target network, and protocol data unit session-related parameters.

[0450] In some embodiments, the switching apparatus further includes a second receiving unit configured to:

[0451] receive the switching-specific radio network temporary identifier sent by the source network device before the monitoring unit 1201 monitors the first control channel based on the switching-specific radio network temporary identifier.

[0452] Figure 12 For details of each embodiment of the switching apparatus shown, please refer to Figure 5 For each embodiment of the switching method shown, to avoid repetition, no further description is given.

[0453] Figure 13 A schematic diagram of another switching apparatus provided by embodiments of the present disclosure is shown, which is applied to a source network device. As shown in the figure, Figure 13 The switching apparatus includes but is not limited to a sending unit 1301, which is specifically described as follows:

[0454] The sending unit 1301 is configured to send a first cell radio network temporary identifier to a target network device, the first cell radio network temporary identifier being an identifier allocated by the source network device for a terminal.

[0455] In some embodiments, the switching device further comprises:

[0456] The receiving unit is configured to receive the switching-specific wireless network temporary identifier sent by the target network device.

[0457] The sending unit 1301 is further configured to send the switching-specific wireless network temporary identifier to the terminal.

[0458] In some embodiments, the sending unit 1301 is further configured to:

[0459] The sending unit 1301 is further configured to send at least one of the following information to the terminal:

[0460] Security parameters, public configuration information of the target network.

[0461] Figure 13 The details of each embodiment of the switching device shown can be referred to in the description of the switching device. Figure 6 The embodiments of the switching method shown will not be repeated here to avoid repetition.

[0462] Figure 14 Another switching device provided by the embodiments of the present disclosure is shown in the schematic diagram. The switching device is applied to a target network device. As shown in the figure, Figure 14 The switching device includes but is not limited to a receiving unit 1401, which is specifically described as follows:

[0463] The receiving unit 1401 is configured to receive the first cell wireless network temporary identifier sent by the source network device. The first cell wireless network temporary identifier is an identifier allocated by the source network device to the terminal.

[0464] In some embodiments, the switching device further comprises:

[0465] The sending unit is configured to send the first control channel based on the switching-specific wireless network temporary identifier. The first control channel carries the first cell wireless network temporary identifier, the second cell wireless network temporary identifier, and the random access resource. The second cell wireless network temporary identifier is an identifier allocated by the target network device to the terminal.

[0466] In some embodiments, the sending unit is further configured to send the switching-specific wireless network temporary identifier to the source network device.

[0467] In some embodiments, the sending unit is further configured to send the second control channel based on the second cell wireless network temporary identifier.

[0468] In some embodiments, the sending unit sends the second control channel based on the second cell wireless network temporary identifier, including:

[0469] The first message is sent through the second control channel. The first message carries timing advance information.

[0470] In some embodiments, the sending unit sends the second control channel based on the second cell radio network temporary identifier, and the method further comprises:

[0471] The terminal-specific configuration is sent through the second control channel, and the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0472] In some embodiments, the first control channel carries a plurality of first cell radio network temporary identifiers corresponding to a plurality of terminals respectively, a plurality of second cell radio network temporary identifiers, and a plurality of random access resources.

[0473] In some embodiments, the sending unit is further configured to send at least one of the following information to the source network device:

[0474] The security parameters, the public configuration information of the target network, and the protocol data unit session-related parameters.

[0475] Figure 14 Details of each embodiment of the switching device shown can be referred to in Figure 7 Each embodiment of the switching method shown will not be described again to avoid repetition.

[0476] The embodiments of the present disclosure also provide a processor-readable storage medium, which stores a program for causing a processor to execute the steps of each embodiment of the switching method. The processor-readable storage medium can be any available medium or data storage device accessible by a processor, including but not limited to a magnetic memory (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical memory (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid-state disk (SSD), etc.).

[0477] Figure 15 A terminal is provided for the embodiments of the present disclosure, wherein the terminal comprises a memory 1501, a transceiver 1502, and a processor 1503.

[0478] The memory 1501 is configured to store a computer program; the transceiver 1502 is configured to transceive data under the control of the processor 1503; and the processor 1503 is configured to read the computer program in the memory 1501 and perform the following steps:

[0479] Receiving a cell radio network temporary identifier sent by the source network device, the cell radio network temporary identifier being an identifier allocated by the target network device for the terminal;

[0480] According to the cell radio network temporary identifier, a control channel sent by the target network device is monitored, the control channel being a control channel scrambled by the cell radio network temporary identifier;

[0481] acquire the random access resource through the control channel;

[0482] initiate the random access procedure to the target network device or the target network based on the random access resource.

[0483] In some embodiments, the control channel sent by the target network device is monitored according to the cell radio network temporary identifier, including:

[0484] acquire the first message through the control channel; the first message carries the timing advance information.

[0485] In some embodiments, the control channel sent by the target network device is monitored according to the cell radio network temporary identifier, further including:

[0486] acquire the terminal-specific configuration through the control channel; the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0487] In some embodiments, the processor 1503 is further configured to:

[0488] receive at least one of the following information sent by the source network device and / or the target network device:

[0489] the security parameter, the public configuration information of the target network, and the protocol data unit session related parameter.

[0490] Figure 16 A source network device is provided for the embodiments of the present disclosure, wherein the source network device comprises a memory 1601, a transceiver 1602, and a processor 1603.

[0491] The memory 1601 is configured to store a computer program; the transceiver 1602 is configured to transceive data under the control of the processor 1603; and the processor 1603 is configured to read the computer program in the memory 1601 and perform:

[0492] acquire the cell radio network temporary identifier of the terminal, which is an identifier allocated by the target network device for the terminal;

[0493] send the cell radio network temporary identifier to the terminal, which is used by the terminal to monitor the control channel sent by the target network device, and the control channel is a control channel scrambled by the cell radio network temporary identifier.

[0494] In some embodiments, the processor 1603 is further configured to:

[0495] send a handover request to the target network device or the target network.

[0496] In some embodiments, after sending the handover request to the target network device or the target network, the processor 1503 is further configured to:

[0497] signaling interaction related to switching between the target network device and the terminal;

[0498] or, signaling interaction related to switching between the target network device and the terminal through the core network device.

[0499] In some embodiments, the processor 1603 is further configured to:

[0500] send at least one of the following information to the terminal:

[0501] security parameters, public configuration information of the target network, and protocol data unit session related parameters.

[0502] In some embodiments, obtaining the cell radio network temporary identifier of the terminal comprises:

[0503] receiving the cell radio network temporary identifier of the terminal sent by the target network device.

[0504] Figure 17 A target network device is provided for the embodiments of the present disclosure, wherein the target network device comprises a memory 1701, a transceiver 1702, and a processor 1703.

[0505] The memory 1701 is configured to store a computer program; the transceiver 1702 is configured to transceive data under the control of the processor 1703; and the processor 1703 is configured to read the computer program in the memory 1701 and perform the following:

[0506] obtaining a cell radio network temporary identifier of a terminal;

[0507] sending the cell radio network temporary identifier to a source network device, the cell radio network temporary identifier being used by the terminal to monitor a control channel sent by the target network device;

[0508] sending the control channel based on the cell radio network temporary identifier.

[0509] In some embodiments, sending the control channel based on the cell radio network temporary identifier comprises:

[0510] sending a random access resource through the control channel.

[0511] In some embodiments, sending the control channel based on the cell radio network temporary identifier further comprises:

[0512] sending a first message through the control channel, the first message carrying timing advance information.

[0513] In some embodiments, sending the control channel based on the cell radio network temporary identifier further comprises:

[0514] The terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0515] In some embodiments, the processor 1703 is further configured to:

[0516] receive a handover request sent by the source network device.

[0517] In some embodiments, after receiving the handover request sent by the source network device, the processor 1703 is further configured to:

[0518] perform signaling interaction related to handover between the terminal and the source network device;

[0519] or, perform signaling interaction related to handover between the terminal and the source network device through the core network device.

[0520] In some embodiments, the processor 1703 is further configured to:

[0521] send at least one of the following information to the terminal:

[0522] security parameters, public configuration information of the target network, and protocol data unit session related parameters.

[0523] Figure 18 A terminal is provided for the embodiments of the present disclosure, wherein the terminal comprises a memory 1801, a transceiver 1802, and a processor 1803.

[0524] The memory 1801 is configured to store a computer program; the transceiver 1802 is configured to transceive data under the control of the processor 1803; and the processor 1803 is configured to read the computer program in the memory 1801 and perform the following:

[0525] listen to a first control channel based on a handover-specific wireless network temporary identifier, the first control channel carrying a first cell wireless network temporary identifier, a second cell wireless network temporary identifier, and random access resources; wherein the first cell wireless network temporary identifier is an identifier allocated by the source network device for the terminal, and the second cell wireless network temporary identifier is an identifier allocated by the target network device for the terminal.

[0526] acquire the random access resources through the first control channel;

[0527] initiate a random access process to the target network device or the target network based on the random access resources.

[0528] In some embodiments, the processor 1803 is further configured to:

[0529] listen to a second control channel based on the second cell wireless network temporary identifier.

[0530] In some embodiments, the second control channel is monitored based on the second cell radio network temporary identifier, including:

[0531] The first message is acquired through the second control channel; the first message carries the timing advance information.

[0532] In some embodiments, the second control channel is monitored based on the second cell radio network temporary identifier, further including:

[0533] The terminal-specific configuration is acquired through the second control channel; the terminal-specific configuration is a configuration allocated by the target network device for the terminal.

[0534] In some embodiments, the processor 1803 is further configured to:

[0535] Receive at least one of the following information sent by the source network device and / or the target network device:

[0536] The security parameter, the public configuration information of the target network, and the protocol data unit session-related parameter.

[0537] In some embodiments, before monitoring the first control channel based on the handover-specific radio network temporary identifier, the processor 1803 is further configured to:

[0538] Receive the handover-specific radio network temporary identifier sent by the source network device.

[0539] Figure 19 A source network device is provided for the embodiments of the present disclosure, wherein the source network device includes a memory 1901, a transceiver 1902, and a processor 1903.

[0540] The memory 1901 is configured to store a computer program; the transceiver 1902 is configured to transceive data under the control of the processor 1903; and the processor 1903 is configured to read the computer program in the memory 1901 and perform:

[0541] Send the first cell radio network temporary identifier to the target network device, the first cell radio network temporary identifier being an identifier allocated by the source network device for the terminal.

[0542] In some embodiments, the processor 1903 is further configured to:

[0543] Receive the handover-specific radio network temporary identifier sent by the target network device;

[0544] Send the handover-specific radio network temporary identifier to the terminal.

[0545] In some embodiments, the processor 1903 is further configured to:

[0546] Send at least one of the following information to the terminal:

[0547] a security parameter, and public configuration information of the target network.

[0548] Figure 20 A target network device is provided for the embodiments of the present disclosure, wherein the target network device comprises a memory 2001, a transceiver 2002, and a processor 2003.

[0549] The memory 2001 is configured to store a computer program; the transceiver 2002 is configured to transceive data under the control of the processor 2003; and the processor 2003 is configured to read the computer program in the memory 2001 and perform the following steps:

[0550] receiving a first cell radio network temporary identifier sent by the source network device, the first cell radio network temporary identifier being an identifier allocated to the terminal by the source network device;

[0551] sending a first control channel based on the handover-specific cell radio network temporary identifier, the first control channel carrying the first cell radio network temporary identifier, a second cell radio network temporary identifier, and random access resources; wherein the second cell radio network temporary identifier is an identifier allocated to the terminal by the target network device.

[0552] In some embodiments, the processor 2003 is further configured to:

[0553] sending the handover-specific cell radio network temporary identifier to the source network device.

[0554] In some embodiments, the processor 2003 is further configured to:

[0555] sending a second control channel based on the second cell radio network temporary identifier.

[0556] In some embodiments, sending the second control channel based on the second cell radio network temporary identifier comprises:

[0557] sending a first message through the second control channel; the first message carrying timing advance information.

[0558] In some embodiments, sending the second control channel based on the second cell radio network temporary identifier further comprises:

[0559] sending a terminal-specific configuration through the second control channel, the terminal-specific configuration being a configuration allocated to the terminal by the target network device for use by the terminal.

[0560] In some embodiments, the first control channel carries a plurality of first cell radio network temporary identifiers, a plurality of second cell radio network temporary identifiers, and a plurality of random access resources corresponding to a plurality of terminals respectively.

[0561] In some embodiments, the processor 2003 is further configured to:

[0562] sending the following at least one information to the source network device:

[0563] security parameters, public configuration information of the target network, protocol data unit session related parameters.

[0564] In the above embodiments, the transceiver is configured to receive and transmit data under the control of the processor. The bus architecture can include any number of interconnected buses and bridges, which link together various circuits from the processor(s) represented by the processor and the memory represented by the memory. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, and thus, are not further described herein. The bus interface provides an interface. The transceiver can be a plurality of elements, i.e., including a transmitter and a receiver, which provide units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and the like. The processor is responsible for managing the bus architecture and general processing, and the memory 1001 can store data used by the processor in performing operations.

[0565] The processor can be an integrated circuit chip having a processing capability of signals. In the implementation process, each step of the above method can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The processor can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0566] It should be noted that in this paper, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the element.

[0567] Those skilled in the art will appreciate that the features of the various embodiments can be combined with each other, where such combinations do not prohibit the features from being claimed both individually and as part of an embodiment.

[0568] Those skilled in the art will appreciate that the description of various embodiments can have emphasized certain features to the exclusion of other features describing such other features is done for the purpose of illustration and explanation only and is not intended to be limiting.

[0569] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, various modifications and changes can be suggested to one skilled in the art, and it is intended that the present disclosure encompass such modifications and changes as fall within the scope of the appended claims.

Claims

1. A switching method applied to a terminal, the method comprising: The terminal receives a temporary identifier for a cell network sent by a source network device, wherein the temporary identifier for the cell network is an identifier assigned to the terminal by the target network device. Listen to the control channel sent by the target network device according to the temporary identifier of the cell wireless network, wherein the control channel is a control channel scrambled with the temporary identifier of the cell wireless network; Random access resources are obtained through the control channel; Based on the random access resources, a random access procedure is initiated to the target network device or the target network.

2. The method according to claim 1, wherein, The step of listening to the control channel sent by the target network device based on the temporary identifier of the cell's wireless network includes: A first message is obtained through the control channel; the first message carries timing advance information. And / or, obtain terminal-specific configuration through the control channel; the terminal-specific configuration is the configuration used by the terminal allocated by the target network device for the terminal.

3. The method according to claim 1, wherein, The method further includes: Receive at least one of the following information sent by the source network device and / or the target network device: Security parameters, common configuration information of the target network, and protocol data unit session-related parameters.

4. A handover method applied to a source network device, the method comprising: Obtain the temporary identifier of the cell's wireless network, which is an identifier assigned to the terminal by the target network device; The terminal sends the temporary identifier of the cell network to the terminal. The temporary identifier of the cell network is used by the terminal to listen to the control channel sent by the target network device. The control channel is a control channel scrambled with the temporary identifier of the cell network.

5. The method according to claim 4, wherein, The method further includes: Send a handover request to the target network device or target network; The signaling interaction related to handover is performed between the device and the target network device; or, the signaling interaction related to handover is performed between the device and the target network device through the core network device.

6. A handover method applied to a target network device, the method comprising: Obtain the temporary identifier of the terminal's cell wireless network; Send the temporary identifier of the cell's wireless network to the source network device; The control channel is sent based on the temporary identifier of the cell's wireless network.

7. The method according to claim 6, wherein, The control channel based on the temporary identifier of the cell's wireless network includes: Random access resources are sent through the control channel; And / or, send a first message through the control channel, the first message carrying timing advance information; And / or, transmit terminal-specific configuration via the control channel, the terminal-specific configuration being the configuration used by the terminal allocated by the target network device for the terminal.

8. The method according to claim 6, wherein, The method further includes: Receive the handover request sent by the source network device; The signaling interaction related to handover is performed between the device and the source network device; or, the signaling interaction related to handover is performed between the device and the source network device through the core network device.

9. A switching method applied to a terminal, the method comprising: Based on the handover-specific temporary wireless network identifier, the first control channel is monitored. The first control channel carries a first cell temporary wireless network identifier, a second cell temporary wireless network identifier, and random access resources. The first cell temporary wireless network identifier is an identifier assigned to the terminal by the source network device, and the second cell temporary wireless network identifier is an identifier assigned to the terminal by the target network device. Random access resources are obtained through the first control channel; Based on the random access resources, a random access procedure is initiated to the target network device or the target network.

10. The method according to claim 9, wherein, The method further includes: Based on the temporary identifier of the second cell's wireless network, the second control channel is monitored.

11. The method according to claim 10, wherein, The method of monitoring the second control channel based on the temporary identifier of the second cell's wireless network includes: The first message is obtained through the second control channel; the first message carries timing advance information. And / or, obtain terminal-specific configuration through the second control channel; the terminal-specific configuration is the configuration used by the terminal allocated by the target network device for the terminal.

12. The method according to claim 9, wherein, The method further includes: Receive at least one of the following information sent by the source network device and / or the target network device: Security parameters, common configuration information of the target network, and protocol data unit session-related parameters.

13. The method according to claim 9, wherein, Before listening to the first control channel based on the temporary identifier of the dedicated wireless network for handover, the method further includes: The temporary wireless network identifier dedicated to the handover is sent by the source network device.

14. A handover method applied to a source network device, the method comprising: Send a first cell wireless network temporary identifier to the target network device. The first cell wireless network temporary identifier is an identifier assigned to the terminal by the source network device.

15. The method according to claim 14, wherein, The method further includes: Receive the temporary wireless network identifier sent by the target network device for handover; Send the temporary wireless network identifier dedicated to the handover to the terminal.

16. A handover method applied to a target network device, the method comprising: The terminal receives a first cell radio network temporary identifier sent by the source network device, wherein the first cell radio network temporary identifier is an identifier assigned to the terminal by the source network device; A first control channel is transmitted based on a handover-specific temporary wireless network identifier. The first control channel carries a first cell temporary wireless network identifier, a second cell temporary wireless network identifier, and random access resources. The second cell temporary wireless network identifier is an identifier assigned to the terminal by the target network device.

17. The method according to claim 16, wherein, The method further includes: Send the temporary wireless network identifier dedicated to the handover to the source network device.

18. The method according to claim 16, wherein, The method further includes: The second control channel is sent based on the temporary identifier of the second cell's wireless network.

19. The method according to claim 18, wherein, The transmission of the second control channel based on the temporary identifier of the second cell radio network includes: A first message is sent via the second control channel; the first message carries timing advance information. And / or, transmit terminal-specific configuration via the second control channel, the terminal-specific configuration being the configuration used by the terminal allocated by the target network device for the terminal.

20. A switching device applied to a terminal, the device comprising: A receiving unit is configured to receive a temporary identifier of a cell network network sent by a source network device, wherein the temporary identifier of the cell network network is an identifier assigned to the terminal by a target network device; The monitoring unit is configured to monitor the control channel sent by the target network device according to the temporary identifier of the cell radio network, wherein the control channel is a control channel scrambled with the temporary identifier of the cell radio network. The acquisition unit is used to acquire random access resources through the control channel; An access unit is used to initiate a random access procedure to the target network device or target network based on the random access resources.

21. A switching device applied to a source network device, the device comprising: The acquisition unit is used to acquire the temporary identifier of the cell wireless network of the terminal, wherein the temporary identifier of the cell wireless network is an identifier assigned to the terminal by the target network device; The transmitting unit is configured to transmit the temporary identifier of the cell radio network to the terminal. The temporary identifier of the cell radio network is used by the terminal to listen to the control channel sent by the target network device. The control channel is a control channel scrambled with the temporary identifier of the cell radio network.

22. A switching device applied to a target network device, the device comprising: The acquisition unit is used to acquire the temporary identifier of the terminal's cell wireless network; The transmitting unit is used to transmit the temporary identifier of the cell radio network to the source network device and to transmit the control channel based on the temporary identifier of the cell radio network.

23. A switching device applied to a terminal, the device comprising: The monitoring unit is used to monitor a first control channel based on a handover-specific temporary radio network identifier. The first control channel carries a first cell temporary radio network identifier, a second cell temporary radio network identifier, and random access resources. The first cell temporary radio network identifier is an identifier assigned to the terminal by the source network device, and the second cell temporary radio network identifier is an identifier assigned to the terminal by the target network device. The acquisition unit is used to acquire random access resources through the first control channel; An access unit is used to initiate a random access procedure to the target network device or target network based on the random access resources.

24. A switching device applied to a source network device, the device comprising: The sending unit is configured to send a first cell wireless network temporary identifier to the target network device, wherein the first cell wireless network temporary identifier is an identifier assigned to the terminal by the source network device.

25. A switching device applied to a target network device, the device comprising: The receiving unit is configured to receive a first cell radio network temporary identifier sent by the source network device, wherein the first cell radio network temporary identifier is an identifier assigned by the source network device to the terminal; The transmitting unit is configured to transmit a first control channel based on a handover-specific temporary radio network identifier. The first control channel carries a first cell temporary radio network identifier, a second cell temporary radio network identifier, and random access resources. The second cell temporary radio network identifier is an identifier assigned to the terminal by the target network device.

26. A terminal, wherein, The terminal includes a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute them. The terminal receives a temporary identifier for a cell network sent by a source network device, wherein the temporary identifier for the cell network is an identifier assigned to the terminal by the target network device. Listen to the control channel sent by the target network device according to the temporary identifier of the cell wireless network, wherein the control channel is a control channel scrambled with the temporary identifier of the cell wireless network; Random access resources are obtained through the control channel; Based on the random access resources, a random access procedure is initiated to the target network device or the target network.

27. The terminal according to claim 26, wherein, The step of listening to the control channel sent by the target network device based on the temporary identifier of the cell's wireless network includes: A first message is obtained through the control channel; the first message carries timing advance information. And / or, obtain terminal-specific configuration through the control channel; the terminal-specific configuration is the configuration used by the terminal allocated by the target network device for the terminal.

28. The terminal according to claim 26, wherein, The processor is also used for: Receive at least one of the following information sent by the source network device and / or the target network device: Security parameters, common configuration information of the target network, and protocol data unit session-related parameters.

29. A source network device, wherein, The source network device includes a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute them. Obtain the temporary identifier of the cell's wireless network, which is an identifier assigned to the terminal by the target network device; The terminal sends the temporary identifier of the cell network to the terminal. The temporary identifier of the cell network is used by the terminal to listen to the control channel sent by the target network device. The control channel is a control channel scrambled with the temporary identifier of the cell network.

30. The source network device according to claim 29, wherein, The processor is also used for: Send a handover request to the target network device or target network; The signaling interaction related to handover is performed between the device and the target network device; or, the signaling interaction related to handover is performed between the device and the target network device through the core network device.

31. A target network device, wherein, The target network device includes a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute them. Obtain the temporary identifier of the terminal's cell wireless network; Send the temporary identifier of the cell's wireless network to the source network device; The control channel is sent based on the temporary identifier of the cell's wireless network.

32. The target network device according to claim 31, wherein, The control channel based on the temporary identifier of the cell's wireless network includes: Random access resources are sent through the control channel; And / or, send a first message through the control channel, the first message carrying timing advance information; And / or, transmit terminal-specific configuration via the control channel, the terminal-specific configuration being the configuration used by the terminal allocated by the target network device for the terminal.

33. The target network device according to claim 31, wherein, The processor is also used for: Receive the handover request sent by the source network device; The signaling interaction related to handover is performed between the device and the source network device; or, the signaling interaction related to handover is performed between the device and the source network device through the core network device.

34. A terminal, wherein, The terminal includes a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute them. Based on the handover-specific temporary wireless network identifier, the first control channel is monitored. The first control channel carries a first cell temporary wireless network identifier, a second cell temporary wireless network identifier, and random access resources. The first cell temporary wireless network identifier is an identifier assigned to the terminal by the source network device, and the second cell temporary wireless network identifier is an identifier assigned to the terminal by the target network device. Random access resources are obtained through the first control channel; Based on the random access resources, a random access procedure is initiated to the target network device or the target network.

35. The terminal according to claim 34, wherein, The processor is also used for: Based on the temporary identifier of the second cell's wireless network, the second control channel is monitored.

36. The terminal according to claim 35, wherein, The method of monitoring the second control channel based on the temporary identifier of the second cell's wireless network includes: The first message is obtained through the second control channel; the first message carries timing advance information. And / or, obtain terminal-specific configuration through the second control channel; the terminal-specific configuration is the configuration used by the terminal allocated by the target network device for the terminal.

37. The terminal according to claim 34, wherein, The processor is also used for: Receive at least one of the following information sent by the source network device and / or the target network device: Security parameters, common configuration information of the target network, and protocol data unit session-related parameters.

38. The method according to claim 34, wherein, Before listening to the first control channel based on the handover-dedicated radio network temporary identifier, the processor is further configured to: The temporary wireless network identifier dedicated to the handover is sent by the source network device.

39. A source network device, wherein, The source network device includes a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute them. Send a first cell wireless network temporary identifier to the target network device. The first cell wireless network temporary identifier is an identifier assigned to the terminal by the source network device.

40. The source network device according to claim 39, wherein, The processor is also used for: Receive the temporary wireless network identifier sent by the target network device for handover; Send the temporary wireless network identifier dedicated to the handover to the terminal.

41. A target network device, wherein, The target network device includes a memory, a transceiver, and a processor; The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and execute them. The terminal receives a first cell radio network temporary identifier sent by the source network device, wherein the first cell radio network temporary identifier is an identifier assigned to the terminal by the source network device; A first control channel is transmitted based on a handover-specific temporary wireless network identifier. The first control channel carries a first cell temporary wireless network identifier, a second cell temporary wireless network identifier, and random access resources. The second cell temporary wireless network identifier is an identifier assigned to the terminal by the target network device.

42. The target network device according to claim 41, wherein, The processor is also used for: Send the temporary wireless network identifier dedicated to the handover to the source network device.

43. The target network device according to claim 41, wherein, The processor is also used for: The second control channel is sent based on the temporary identifier of the second cell's wireless network.

44. The target network device according to claim 43, wherein, The transmission of the second control channel based on the temporary identifier of the second cell radio network includes: A first message is sent via the second control channel; the first message carries timing advance information. And / or, transmit terminal-specific configuration via the second control channel, the terminal-specific configuration being the configuration used by the terminal allocated by the target network device for the terminal.

45. A processor-readable storage medium, wherein, The processor-readable storage medium stores a program for causing the processor to perform the switching method as described in any one of claims 1 to 3, or the switching method as described in claim 4 or 5, or the switching method as described in any one of claims 6 to 8, or the switching method as described in any one of claims 9 to 13, or the switching method as described in claim 14 or 15, or the switching method as described in any one of claims 16 to 19.

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