Information transmission method, device, network equipment and terminal

Abstract

The embodiment of the present application discloses an information transmission method, apparatus, network device and terminal, the method is applied to a first network device, the method comprises: before a first cell in a target geographical area is switched to a second cell, providing auxiliary information, the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device. It can be seen that in the embodiment of the present application, since the auxiliary information is provided by the first network device before the first cell is switched to the second cell, the data interaction process between the second network device and the terminal and the first network device is reduced, saving wireless resources.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an information transmission method, apparatus, network equipment and terminal. Background Art

[0002] With the development of communication technology, Narrow Band Internet of Things (NB-IoT) type terminals can transmit data through wireless networks, thereby exchanging information with corresponding business servers. For example, terminals such as water meters and electricity meters report water and electricity consumption every month through the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) network, thereby saving manual meter reading. NB-IoT terminals access the non-terrestrial access network (NTN). For data transmission between NB-IoT terminals and NB-IoT base stations, the NB-IoT terminal needs to detect the failure of the wireless link in the original cell, and then reselect to a new cell. After that, the connection is established in the new cell through the Radio Resource Control (RRC) re-establishment process to continue transmitting data.

[0003] At present, the satellites used by the NTN network are moving rapidly around the earth in the air. Therefore, for the NB-IoT terminals on the ground, they are in a state of relatively high-speed movement with the satellites, and need to frequently change cells. In addition, the NB-IoT base station corresponding to the replaced cell needs to execute a complex data interaction process with the NB-IoT base station corresponding to the previous cell and the terminals from the previous cell, which wastes wireless resources. Summary of the invention

[0004] The embodiments of the present application propose an information transmission method, apparatus, network device and terminal, which can reduce the data interaction process between the second network device and the terminal and the first network device, thereby saving wireless resources.

[0005] In a first aspect, an embodiment of the present application provides a transmission method, which is applied to a first network device, and the method includes:

[0006] Before a first cell in a target geographical area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to the first network device and the second cell is a cell corresponding to the second network device.

[0007] In a second aspect, an embodiment of the present application provides a transmission method, which is applied to a second network device, and the method includes:

[0008] Before switching from a first cell in a target geographical area to a second cell, auxiliary information is obtained, the first cell being a cell corresponding to a first network device, and the second cell being a cell corresponding to the second network device.

[0009] In a third aspect, an embodiment of the present application provides a transmission method, applied to a terminal, the method comprising:

[0010] Before the first cell in the target geographical area is switched to the second cell, auxiliary information is obtained, where the first cell is the cell corresponding to the first network device, the second cell is the cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0011] In a fourth aspect, an embodiment of the present application provides a transmission device, applied to a first network device, the device comprising a processing unit and a communication unit:

[0012] The processing unit is used to provide auxiliary information through the communication unit before switching from a first cell to a second cell in a target geographical area, the first cell being a cell corresponding to the first network device, and the second cell being a cell corresponding to the second network device.

[0013] In a fifth aspect, an embodiment of the present application provides a transmission device, applied to a second network device, the device comprising a processing unit and a communication unit:

[0014] The processing unit is used to obtain auxiliary information through the communication unit before switching from a first cell to a second cell in a target geographical area, the first cell being a cell corresponding to a first network device, and the second cell being a cell corresponding to the second network device.

[0015] In a sixth aspect, an embodiment of the present application provides a transmission device, applied to a terminal, the device comprising a processing unit and a communication unit:

[0016] The processing unit is used to obtain auxiliary information through the communication unit before the first cell in the target geographical area is switched to the second cell, the first cell is the cell corresponding to the first network device, the second cell is the cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0017] In the seventh aspect, an embodiment of the present application provides a first network device, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in the method described in any one of the first aspects.

[0018] In an eighth aspect, an embodiment of the present application provides a second network device, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in the method described in any one of the second aspects.

[0019] In the ninth aspect, an embodiment of the present application provides a terminal, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in the method described in any one of the third aspects.

[0020] In the tenth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program enables a computer to execute a method as described in any one of the first aspect, the second aspect, and the third aspect.

[0021] In the eleventh aspect, an embodiment of the present application provides a chip, which is applied to a first network device, and the chip is used to provide auxiliary information before a first cell in a target geographical area is switched to a second cell, wherein the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0022] In the twelfth aspect, an embodiment of the present application provides a chip, which is applied to a first network device, and the chip module includes a transceiver component and a chip. The chip is used to provide auxiliary information through the transceiver component before a first cell in a target geographical area is switched to a second cell. The first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0023] In the thirteenth aspect, an embodiment of the present application provides a chip, which is applied to a second network device, and the chip is used to obtain auxiliary information before switching from a first cell in a target geographical area to a second cell, wherein the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0024] In the fourteenth aspect, an embodiment of the present application provides a chip module, which is applied to a second network device, and the chip module includes a transceiver component and a chip. The chip is used to obtain auxiliary information through the transceiver component before switching from a first cell in a target geographical area to a second cell. The first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0025] In the fifteenth aspect, an embodiment of the present application provides a chip, which is applied to a terminal, and the chip is used to obtain auxiliary information before switching from a first cell in a target geographical area to a second cell, wherein the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0026] In the sixteenth aspect, an embodiment of the present application provides a chip module, which is applied to a terminal, and the chip module includes a transceiver component and a chip, and the chip is used to obtain auxiliary information through the transceiver component before switching from a first cell in a target geographical area to a second cell, the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0027] The technical solution provided by the present application is that the first network device provides auxiliary information before switching from a first cell in a target geographical area to a second cell, wherein the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device. It can be seen that in the embodiment of the present application, since the auxiliary information is sent by the first network device, the data interaction process between the second network device and the terminal and the first network device is reduced, thereby saving wireless resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0030] Figure 2A It is a flowchart of an information transmission method provided in an embodiment of the present application;

[0031] Figure 2B This is a schematic diagram of an application scenario of an information transmission method provided in an embodiment of the present application;

[0032] Figure 2C It is a schematic diagram of an application scenario of another information transmission method provided in an embodiment of the present application;

[0033] Figure 3A It is a flowchart of another information transmission method provided in an embodiment of the present application;

[0034] Figure 3B This is a schematic diagram of an application scenario of another information transmission method provided in an embodiment of the present application;

[0035] Figure 3C This is a schematic diagram of an application scenario of another information transmission method provided in an embodiment of the present application;

[0036] Figure 4 It is a block diagram of the functional units of an information transmission device provided in an embodiment of the present application;

[0037] Figure 5 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, software, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0040] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments. The embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0041] The technical solution of the embodiment of the present application can be applied to a non-terrestrial network (NTN) communication system, and the NTN communication system generally uses satellite communication to provide communication services to ground terminals.

[0042] The "at least one" involved in the embodiments of the present application refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where each of a, b, c can be an element itself, or a set containing one or more elements.

[0043] Furthermore, unless otherwise specified, ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects. For example, the first information and the second information are only used to distinguish different information, and do not indicate the difference in content, priority, sending order or importance of the two types of information.

[0044] The "connection" that appears in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitations on this.

[0045] The embodiments of the present application describe various embodiments in combination with a terminal, a satellite, and a network device, which are described in detail below.

[0046] Specifically, the terminal in the embodiment of the present application may be a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, a user agent or a user device. The terminal may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a relay device, a vehicle-mounted device, a wearable device, a terminal in a next-generation communication system such as an NR network or a terminal in a future-evolved public land mobile communication network (PLMN), etc., without specific limitation.

[0047] Furthermore, the terminal can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can be deployed on the water surface (such as ships); it can also be deployed in the air (such as airplanes, balloons and satellites).

[0048] Furthermore, the terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a vehicle-mounted device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0049] Specifically, the satellite in the embodiment of the present application can be a spacecraft carrying a bent pipe payload or a regenerative payload signal transmitter, which usually operates in a low earth orbit (LEO) at an altitude between 300 and 1500km, a medium earth orbit (MEO) at an altitude between 7000 and 25000km, a geostationary earth orbit (GEO) at an altitude of 35786km, or a high elliptical orbit (HEO) at an altitude between 400 and 50000km. In other words, the satellite can be a LEO satellite, a MEO satellite, a GEO satellite, or a HEO satellite, etc., according to the different orbital altitudes.

[0050] Furthermore, a satellite in an NTN communication system usually generates one or more beams (or beam footprints) on the ground, and the one or more beams form cells on the ground.

[0051] Specifically, the network device (including the first network device and the second network device) in the embodiment of the present application can be a base station (base transceiverstation, BTS) in a global system of mobile communication (GSM) communication system or a code division multiple access (CDMA) communication system, a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) communication system, an evolutionary base station (eNB or eNodeB) in a long term evolution (LTE) communication system, or a base station (gNB) in a new radio (NR) communication system. The network device can also be an access point (AP) in a wireless local area network WLAN, a relay station, a network device in a future evolved PLMN network, or a network device in an NTN communication system, etc.

[0052] It should be noted that in some network deployments, the gNB may include a centralized unit (CU) and a distributed unit (DU), and the gNB may also include an active antenna unit (AAU). Among them, the CU can implement some functions of the gNB, and the DU can also implement some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer; the DU is responsible for processing the physical layer protocol and real-time services, and implementing the functions of the radio link control (RLC) layer, the medium access control (MAC) layer and the physical (PHY) layer. In addition, the AAU implements some physical layer processing functions, RF processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, the high-level signaling (such as the RRC layer signaling) can be considered to be sent by the DU, or by the DU+AAU. It is understandable that the network device may include one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be classified as a network device in an access network (RAN), or may be classified as a network device in a core network (CN), without specific limitation.

[0053] For example, the communication system used in the embodiments of the present application is as follows: Figure 1 As shown. The non-terrestrial network communication system 10 may include a terminal A 110, a first network device 120, a second network device 130, a first cell 140, a second cell 150, a satellite 160, and a satellite 170. Among them, the terminal A 10, the first network device 120, and the second network device 130 may be located on the surface of the earth, and the satellite 160 and the satellite 170 are located in the earth orbit. The satellite 160 may provide the first cell 140 for communication services to the target geographical area covered by the signal, and may communicate with the terminal A 10 located in the signal coverage area. The satellite 170 may provide the second cell 150 for communication services to the target geographical area covered by the signal, and may communicate with the terminal A 110 located in the signal coverage area, and the second cell 150 is the first cell covering the target geographical area after the first cell 140.

[0054] Combination Figure 1The communication system shown introduces the information transmission method of the embodiment of the present application.

[0055] For example, Figure 2A A flow chart of an information transmission method provided in an embodiment of the present application is as follows: Figure 2A As shown, the information transmission specifically includes the following steps:

[0056] S101. Before switching from a first cell in a target geographical area to a second cell, a first network device provides auxiliary information to a second network device.

[0057] S102: Before switching from the first cell to the second cell, the second network device receives auxiliary information from the first network device.

[0058] As a specific implementation manner, providing the auxiliary information refers to transmitting the auxiliary information to the target node.

[0059] The first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device. The target geographical area may be a geographical area on the surface of the earth that can be covered by any first cell and any second cell.

[0060] The switching of the first cell to the second cell in the target geographical area refers to the switching of the cell providing services for the target area from the first cell to the second cell.

[0061] It can be seen that in this example, by completing the information transmission between the first network device and the second network device before the first cell switches to the second cell, after the second cell provides services for the target geographical area, the auxiliary information that was originally required to be obtained by the second network device during the data interaction between the terminal in the target geographical area and the second network device has been acquired before the first cell switches to the second cell, and can be used directly, thereby reducing the data interaction process between the terminal and the second network device, saving energy consumption of the terminal, and at the same time, saving wireless resources.

[0062] Among them, the auxiliary information includes but is not limited to first notification information and / or third notification information; the first notification information includes context information and / or cache status report information, the context information includes part or all of at least one context of at least one terminal in a connected state or an INACTIVE state in the first cell, the cache status report information includes part or all of at least one cache status report of the at least one terminal, and the cache status report refers to the cache status report corresponding to the moment when the first cell stops providing services to the target geographical area; the third notification information is used to indicate that the RRC re-establishment request from the terminal of the first cell does not carry the identification information of the first cell.

[0063] Exemplarily, the identification information of the first cell may be a physical cell identifier PCI of the first cell, or a global cell identifier CGI of the first cell, or other forms of identification information of the first cell.

[0064] There is no specific limitation on the number of the at least one terminal, and it can be understood that one terminal corresponds to one context and / or one cache status report.

[0065] Furthermore, the cache status report may include but is not limited to the amount of data to be transmitted.

[0066] In a possible embodiment, the implementation method of providing the auxiliary information to the second network device may be to send the first notification information to the second network device once; or, to send the first notification information to the second network device multiple times. The multiple times may be 3 times, 5 times, 10 times, 100 times, etc., without specific limitation, and the number of contexts and / or cache status reports in the first notification information sent each time is not specifically limited.

[0067] In a possible embodiment, the sending timing of each context of part or all of the at least one context is before the end time when the terminal corresponding to the context performs radio link failure RLF related operations of the first cell.

[0068] For example, the at least one terminal includes terminal A, terminal B, terminal C, and terminal D. The at least one context includes context A corresponding to terminal A, context B corresponding to terminal B, context C corresponding to terminal C, and context D corresponding to terminal D. If the end time of the RLF-related operation performed by terminal A on the first network device is time 1, the end time of the RLF-related operation performed by terminal B on the first network device is time 1, the end time of the RLF-related operation performed by terminal C on the first network device is time 2, and the end time of the RLF-related operation performed by terminal D on the first network device is time 2; then the sending timing of context A and context B is before time 1, the sending timing of context C is before time 2, and the sending timing of context D is before time 3.

[0069] It should be noted that if the first network device sends the context of the terminal to the second network device before the terminal finishes performing the RLF-related operations of the first cell, the second network device no longer needs to request the context of the terminal from the first network device during the RRC re-establishment process between the terminal and the second cell. Obtaining the context of the terminal reduces the process of the second network device requesting the context of the terminal from the first network device during the RRC re-establishment process between the terminal and the second cell, thereby improving the speed of the RRC re-establishment between the terminal and the second cell.

[0070] In specific application scenarios, such as Figure 2B As shown, the UE is in the target geographical area, and the process of switching from the cell Cell 1 of the target geographical area to the cell Cell 2, after time T1, which is the time when Cell 1 stops serving the target geographical area, the UE will enter the RLF process of the base station corresponding to Cell 1, and after the RLF process is completed, the UE will enter the RRC re-establishment process with Cell 2, and when the UE enters the RLF process and the RRC re-establishment process, the UE cannot transmit data, and the base station corresponding to Cell 1 sends the context of the UE to the base station corresponding to Cell 2 before the end time T2 of the UE performing the RLF-related operations of the base station, because the base station corresponding to Cell 2 has obtained the context of the UE from the base station corresponding to Cell 1, refer to Figure 2C , Figure 2C In the example, the base station corresponding to Cell 1 has not sent the context of the UE to the base station corresponding to Cell 2 before T2. In the RRC re-establishment process between the UE and Cell 2, the base station corresponding to Cell 2 needs to request the base station corresponding to Cell 1 to obtain the context of the UE. Figure 2BAs shown, in the RRC re-establishment process between the UE and Cell 2, the base station corresponding to Cell 2 does not need to request the base station corresponding to Cell 1 to obtain the context of the UE, thereby saving wireless resources.

[0071] In a possible embodiment, the sending timing of each buffer status report of part or all of the at least one buffer status report is before the end time when the terminal corresponding to the buffer status report performs an RRC re-establishment operation with the second network device.

[0072] For example, the at least one terminal includes terminal A, terminal B, terminal C, and terminal D. The at least one cache status report includes a cache status report A corresponding to the terminal A, a cache status report B corresponding to the terminal B, a cache status report C corresponding to the terminal C, and a cache status report D corresponding to the terminal D. If the end time of the RRC re-establishment operation performed by terminal A with the second network device is time 1, the end time of the RRC re-establishment operation performed by terminal B with the second network device is time 1, the end time of the RRC re-establishment operation performed by terminal C with the second network device is time 2, and the end time of the RRC re-establishment operation performed by terminal D with the second network device is time 2, then the sending timing of cache status report A and cache status report B is before time 1, the sending timing of cache status report C is before time 2, and the sending timing of cache status report D is before time 3.

[0073] It should be noted that if the first network device sends a cache status report of the terminal (such as the amount of data to be transmitted) to the second network device before the terminal ends the RRC re-establishment operation with the second network device, then after the terminal accesses the second cell, there is no need to send the amount of data to be transmitted to the second network device.

[0074] In specific application scenarios, such as Figure 2CAs shown, the UE is in the target geographical area, and the process of switching Cell 1 of the target geographical area to Cell 2, after time T1, which is the time when Cell 1 stops serving the target geographical area, the UE will enter the RLF process of the base station corresponding to Cell 1, and after the RLF process is completed, the UE will enter the RRC re-establishment process with Cell 2, and after the UE completes the RLF process and the RRC re-establishment process, the UE and the base station corresponding to Cell 1 perform data transmission, and the base station corresponding to Cell 1 sends the UE's to-be-transmitted data volume (the amount of data to be transmitted corresponding to the moment when Cell 1 stops providing services to the target geographical area) to the base station corresponding to Cell 2 before the end time T2 when the UE performs the RRC re-establishment operation with the second network device. Therefore, the UE does not need to report the UE's to-be-transmitted data volume to the base station corresponding to Cell 2, which saves wireless resources and reduces UE power consumption.

[0075] In a possible embodiment, the auxiliary information includes the third notification information, and before the second network device switches from the first cell to the second cell, after receiving the auxiliary information from the first network device, the method also includes: if an RRC re-establishment request that does not carry identification information is obtained, the second network device obtains the PCI information of the first cell from the third network device, and the PCI information is used to indicate the PCI of the first cell; the second network device determines, based on the PCI information, that the PCI of the terminal of the RRC re-establishment request is the PCI of the first cell.

[0076] That is, the second cell can learn, through the configuration of the third network device, that the last cell covering the target geographical area is the first cell.

[0077] As an example, another information transmission method provided by an embodiment of the present application is as follows: Before switching from a first cell to a second cell in a target geographical area, a terminal obtains auxiliary information.

[0078] The first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0079] The auxiliary information includes second notification information and / or fourth notification information; the second notification information is used to indicate that the RRC re-establishment request sent to the second cell does not carry the identification information of the first cell; the fourth notification information is used to indicate the moment when the first cell stops covering the target geographical area and the moment when the second cell starts covering the target geographical area.

[0080] It can be seen that in this example, the terminal in a connected state or an INACTIVE state in the first cell obtains auxiliary information before switching from the first cell to the second cell in the target geographical area. After the second cell provides services for the target geographical area, the terminal directly interacts with the second network device based on the auxiliary information. Because the terminal can directly use the acquisition and completion of the auxiliary information before switching from the first cell to the second cell, the process of the second network device requesting auxiliary information from the terminal or the first network device is reduced, thereby saving wireless resources.

[0081] The second notification information is configured by the first network device.

[0082] In practical applications, in order to ensure that the UE and the base station corresponding to Cell 2 obtain information consistency in the RRC re-establishment process, before Cell 1 in the target geographical area switches to Cell 2, the first network device may send a third notification message to the second network device (see the description of the third notification message in method example 1, which will not be repeated here), or the third notification message of the second network device corresponding to Cell 2 may be specified through a protocol.

[0083] It should be made clear that in actual applications, the second notification information and the third notification information appear in coordination.

[0084] If the second notification information is configured by the first network device, refer to Figure 3A , Figure 3A A flowchart of another information transmission processing method provided in an embodiment of the present application, such as Figure 3A As shown, the information transmission processing method specifically includes the following steps.

[0085] S201. Before switching from a first cell to a second cell in a target geographical area, a first network device provides auxiliary information to a terminal.

[0086] S201. Before switching from the first cell to the second cell, the terminal receives auxiliary information from the first network device.

[0087] In this case, in order to ensure that the UE and the base station corresponding to Cell 2 obtain information consistency in the RRC re-establishment process, the first network device may also send third notification information to the second network device before switching the first cell to the second cell.

[0088] In specific application scenarios, such as Figure 3BAs shown, the UE is in the target geographical area, and the process of switching from Cell 1 to Cell 2 in the target geographical area, after time T1, which is the time when Cell 1 stops serving the target geographical area, the UE will enter the RLF process of the base station corresponding to Cell 1, and after the RLF process is completed, the UE will enter the RRC re-establishment process with Cell 2. Before T1, if the base station corresponding to Cell 1 sends a second indication message to the UE and sends a third indication message to the base station corresponding to Cell 2, in the RLF process, the UE generates an RRC re-establishment request that does not carry the identification information of Cell 1 based on the second indication message, and sends the RRC re-establishment request to the base station corresponding to Cell 2. After the base station corresponding to Cell 2 receives the RRC re-establishment request, it determines that the UE is from Cell 1 based on the third indication message, and can obtain information that the previous cell covering the current geographical area is cell 1 by receiving the PCI information from the third network device.

[0089] In a possible embodiment, the auxiliary information includes the fourth notification information. After the terminal obtains the auxiliary information, the method further includes: after the terminal covers the target geographical area in the second cell, if the terminal completes the transmission of the first transmission block for a preset number of times, the remaining coverage time of the first cell in the target geographical area is determined according to the fourth notification information, and the second transmission block is the first transmission block to be transmitted after the first transmission block; the terminal determines whether the transmission of the second transmission block can be completed the preset number of times according to the remaining coverage time; if the transmission of the second transmission block can be completed the preset number of times, the terminal obtains the transmission mode of the second transmission block, and the transmission mode includes transmission through the first cell, or transmission through the second cell; the terminal transmits the second transmission block according to the transmission mode.

[0090] The preset number of times is pre-configured and can be 3 times, 4 times, 8 times, etc., without specific limitation.

[0091] In a possible embodiment, the transmission mode is determined by the terminal according to the delay budget residual of the second transmission block, or is configured by the first network device through at least one of RRC signaling and media access control control element MAC CE signaling.

[0092] Specifically, the implementation method of the transmission mode determined by the terminal according to the delay budget remaining amount of the second transmission block can be: judging whether the delay budget of the second transmission block is greater than a threshold; if the delay budget is greater than the threshold, determining the transmission mode is to transmit the transmission block to be transmitted through the second cell; if the delay budget is less than the threshold, determining the transmission mode is to transmit through the first cell.

[0093] In a possible embodiment, if the preset number of transmissions of the second transmission block cannot be completed, the second transmission block is transmitted through the second cell.

[0094] In specific application scenarios, such as Figure 3C As shown, the UE is in the target geographical area, T1 is the moment when Cell 1 stops serving the target geographical area, and T4 is the moment when Cell 2 starts serving the target geographical area. The time period between T1 and T4 is the overlapping time period when Cell 1 provides services for the target area and Cell 2 provides services for the target area. If the base station corresponding to Cell 1 sends a fourth indication message to the UE before T4, if the UE completes the repeated transmission of the transmission block TB1 N times after T1, the remaining coverage time of Cell 1 in the target geographical area will be determined based on the fourth indication message, so as to further obtain the transmission method for TB2 that needs to be transmitted after TB1.

[0095] In combination with the above method example 1 and method example 2, the following is summarized from the first network device, the second network device, and the terminal:

[0096] For a first device, before a first cell in a target geographical area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device. The auxiliary information includes at least one of first notification information, second notification information, third notification information, and fourth notification information. Optionally, the providing of auxiliary information includes: providing the first notification information once; or providing the first notification information multiple times. Optionally, the providing of auxiliary information includes: sending the first notification information and / or the third notification information to the second network device. Optionally, the providing of auxiliary information includes: sending the second notification information and / or the fourth notification information to the at least one terminal.

[0097] For the second network device, the method includes: before the first cell in the target geographical area is switched to the second cell, obtaining auxiliary information, the first cell is the cell corresponding to the first network device, and the second cell is the cell corresponding to the second network device. The auxiliary information includes first notification information and / or third notification information. Optionally, the obtaining of auxiliary information includes: receiving the first notification information once; or receiving the first notification information multiple times. Optionally, the obtaining of auxiliary information includes: receiving the first notification information and / or the third notification information from the first network device. Further, the auxiliary information includes the third notification information, and before the first cell in the target geographical area is switched to the second cell, after obtaining the auxiliary information, the method further includes: if an RRC re-establishment request without identification information is obtained, obtaining PCI information of the first cell from the third network device, the PCI information is used to indicate the PCI of the first cell; and determining the PCI of the terminal of the RRC re-establishment request as the PCI of the first cell according to the PCI information.

[0098] For a terminal, the method includes: obtaining auxiliary information before switching from a first cell in a target geographical area to a second cell. The auxiliary information includes second notification information and / or fourth notification information. The second notification information is configured by the first network device. Further, the auxiliary information includes the fourth notification information. After obtaining the auxiliary information, the method also includes: after the second cell covers the target geographical area, if the terminal completes the transmission of the first transmission block for a preset number of times, determining the remaining coverage duration of the first cell in the target geographical area according to the fourth notification information, the second transmission block is the first transmission block to be transmitted after the first transmission block; judging whether the transmission of the second transmission block for the preset number of times can be completed according to the remaining coverage duration; if the transmission of the second transmission block for the preset number of times can be completed, obtaining the transmission mode of the second transmission block, the transmission mode includes transmission through the first cell, or transmission through the second cell; transmitting the second transmission block according to the transmission mode. The transmission mode is determined by the terminal according to the delay budget remaining amount of the second transmission block, or configured by the first network device through at least one of RRC signaling and media access control control information element MAC CE signaling. Optionally, if the preset number of transmissions of the second transmission block cannot be completed, the second transmission block is transmitted through the second cell.

[0099] For a first network device, a second network device, and a terminal, the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0100] For the first network device and the second network device, the transmission timing (including sending timing and receiving timing) of each context in part or all of the at least one context is before the end time when the terminal corresponding to the context performs the radio link failure RLF related operation of the first cell. The transmission timing (including sending timing and receiving timing) of each buffer status report in part or all of the at least one buffer status report is before the end time when the terminal corresponding to the buffer status report performs the RRC re-establishment operation with the second network device.

[0101] In addition, the first notification information includes context information and / or cache status report information, the context information includes part or all of at least one context of at least one terminal in the first cell, the cache status report information includes part or all of at least one cache status report of the at least one terminal, and the cache status report refers to the cache status report corresponding to the moment when the first cell stops providing services to the target geographical area; the second notification information is used to indicate that the radio resource control RRC re-establishment request sent to the second cell does not carry the identification information of the first cell; the third notification information is used to indicate that the RRC re-establishment request from the terminal of the first cell does not carry the identification information of the first cell; the fourth notification information is used to indicate the moment when the first cell stops covering the target geographical area and the moment when the second cell starts covering the target geographical area. The cache status report includes the amount of data to be transmitted.

[0102] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that, in order to realize the above functions, the electronic device includes a hardware structure and / or software module corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0103] See also Figure 4 , Figure 4 It is a functional unit composition block diagram of an information transmission device 400 provided in an embodiment of the present application. The device 400 may also be a first network device, the device 400 may also be a second network device, the device 400 may be a terminal, and the device 400 includes: a communication unit 410 and a processing unit 420.

[0104] In a possible implementation, the apparatus 400 is used to execute various processes and steps corresponding to the first network device in the above transmission method.

[0105] The processing unit is used for providing auxiliary information through the communication unit 410 before switching from a first cell in a target geographical area to a second cell, wherein the first cell is a cell corresponding to the first network device and the second cell is a cell corresponding to the second network device.

[0106] In a possible example, the auxiliary information includes at least one of first notification information, second notification information, third notification information and fourth notification information; the first notification information includes context information and / or cache status report information, the context information includes part or all of at least one context of at least one terminal in the first cell, the cache status report information includes part or all of at least one cache status report of the at least one terminal, and the cache status report refers to the cache status report corresponding to the moment when the first cell stops providing service to the target geographical area; the second notification information is used to indicate that the radio resource control RRC re-establishment request sent to the second cell does not carry the identification information of the first cell; the third notification information is used to indicate that the RRC re-establishment request from the terminal of the first cell does not carry the identification information of the first cell; the fourth notification information is used to indicate the moment when the first cell stops covering the target geographical area and the moment when the second cell starts covering the target geographical area.

[0107] In a possible example, the cache status report includes the amount of data to be transmitted.

[0108] In a possible example, in terms of providing auxiliary information, the processing unit 420 is specifically used to: provide the first notification information once through the communication unit 410; or provide the first notification information multiple times through the communication unit 410.

[0109] In a possible example, in terms of providing auxiliary information, the processing unit 420 is specifically used to: send the first notification information and / or the third notification information to the second network device through the communication unit 410.

[0110] In a possible example, the sending timing of each context of part or all of the at least one context is before the end moment when the terminal corresponding to the context performs radio link failure RLF related operations of the first cell.

[0111] In a possible example, the sending timing of each buffer status report of part or all of the at least one buffer status report is before the end time when the terminal corresponding to the buffer status report performs an RRC re-establishment operation with the second network device.

[0112] In a possible example, in terms of providing auxiliary information, the processing unit 420 is specifically used to: send the second notification information and / or the fourth notification information to the at least one terminal through the communication unit 410.

[0113] In another possible implementation, the apparatus 400 is used to execute various processes and steps corresponding to the second network device in the above transmission method.

[0114] The processing unit is used to obtain auxiliary information through the communication unit before switching from a first cell to a second cell in a target geographical area, the first cell being a cell corresponding to a first network device, and the second cell being a cell corresponding to the second network device.

[0115] In one possible example, the auxiliary information includes first notification information and / or third notification information; the first notification information includes context information and / or cache status report information, the context information includes part or all of at least one context of at least one terminal in the first cell, the cache status report information includes part or all of at least one cache status report of the at least one terminal, and the cache status report refers to the cache status report corresponding to the moment when the first cell stops providing service to the target geographical area; the third notification information is used to indicate that the RRC re-establishment request from the terminal of the first cell does not carry the identification information of the first cell.

[0116] In a possible example, the cache status report includes the amount of data to be transmitted.

[0117] In a possible example, in terms of obtaining auxiliary information, the processing unit 420 is specifically used to: receive the first notification information once through the communication unit 410; or receive the first notification information multiple times through the communication unit 410.

[0118] In a possible example, in terms of obtaining the auxiliary information, the processing unit 420 is specifically used to: receive the first notification information and / or the third notification information from the first network device through the communication unit 410.

[0119] In a possible example, the reception timing of each context of part or all of the at least one context is before the end time of the corresponding terminal performing radio link failure RLF related operations of the first cell.

[0120] In a possible example, a timing of receiving part or all of the at least one cache status report is before a time when the corresponding terminal ends the RRC re-establishment operation with the second network device.

[0121] In one possible example, the auxiliary information includes the third notification information, and the processing unit 420 is also used to: if an RRC re-establishment request that does not carry identification information is obtained through the communication unit 410, obtain the PCI information of the first cell from the third network device through the communication unit 410, and the PCI information is used to indicate the PCI of the first cell; determine that the PCI of the terminal of the RRC re-establishment request is the PCI of the first cell according to the PCI information.

[0122] In another possible implementation, the apparatus 400 is used to execute various processes and steps corresponding to the terminal in the above transmission method.

[0123] The processing unit is used to obtain auxiliary information through the communication unit 410 before the first cell in the target geographical area is switched to the second cell, the first cell is the cell corresponding to the first network device, the second cell is the cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0124] In one possible example, the auxiliary information includes second notification information and / or fourth notification information; the second notification information is used to indicate that the RRC re-establishment request sent to the second cell does not carry the identification information of the first cell; the fourth notification information is used to indicate the moment when the first cell stops covering the target geographical area and the moment when the second cell starts covering the target geographical area.

[0125] In a possible example, the second notification information is configured by the first network device.

[0126] In one possible example, the auxiliary information includes the fourth notification information, and the processing unit 420 is also used to: after the auxiliary information is obtained through the communication unit 410, after the second cell covers the target geographical area, if the terminal completes the transmission of the first transmission block for a preset number of times, determine the remaining coverage time of the first cell of the target geographical area according to the fourth notification information, and the second transmission block is the first transmission block to be transmitted after the first transmission block; determine whether the transmission of the second transmission block can be completed the preset number of times according to the remaining coverage time; if the transmission of the second transmission block can be completed the preset number of times, obtain the transmission mode of the second transmission block, and the transmission mode includes transmission through the first cell, or transmission through the second cell; transmit the second transmission block according to the transmission mode.

[0127] In a possible example, the transmission mode is determined by the terminal according to the delay budget remaining amount of the second transmission block, or is configured by the first network device through at least one of RRC signaling and media access control control element MAC CE signaling.

[0128] In a possible example, if the preset number of transmissions of the second transmission block cannot be completed, the second transmission block is transmitted through the second cell.

[0129] It can be understood that the functions of each program module of the transmission device of the embodiment of the present application can be specifically implemented according to the method in the above method embodiment, and its specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0130] It should be understood that the device 400 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit, and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 400 may be specifically a terminal and a network device in the above-mentioned embodiment, and the device 400 may be used to execute the various processes and / or steps corresponding to the first network device, the second network device, and the terminal in the above-mentioned method embodiment, and to avoid repetition, it will not be repeated here.

[0131] The apparatus 400 of each of the above schemes has the function of implementing the corresponding steps executed by the first network device, the second network device, and the terminal in the above method; the function can be implemented by hardware, or by hardware executing the corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the processing unit 420 can be replaced by a processor, and the communication unit 410 can be replaced by a transmitter and a receiver, respectively performing the transceiver operations and related processing operations in each method embodiment.

[0132] In the embodiments of the present application, Figure 4 The device 400 in the embodiment may also be a chip, a chip module, a UE or a chip system, such as a system on chip (SoC). Correspondingly, the communication unit 410 may be a transceiver circuit of the chip, which is not limited here.

[0133] See also Figure 5 , Figure 5 An electronic device provided by an embodiment of the present application includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memories and are configured to be executed by the one or more processors.

[0134] In a possible implementation manner, the electronic device is a first network device, and the program includes instructions for executing the following steps:

[0135] Before a first cell in a target geographical area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to the first network device and the second cell is a cell corresponding to the second network device.

[0136] In another possible implementation, the electronic device is a second network device, and the program includes instructions for executing the following steps:

[0137] Before switching from a first cell in a target geographical area to a second cell, auxiliary information is obtained, the first cell being a cell corresponding to a first network device, and the second cell being a cell corresponding to the second network device.

[0138] In a possible implementation, the electronic device is a terminal, and the program includes instructions for executing the following steps:

[0139] Before the first cell in the target geographical area is switched to the second cell, auxiliary information is obtained, where the first cell is the cell corresponding to the first network device, the second cell is the cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0140] Among them, all relevant contents of each scenario involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0141] It should be understood that the above-mentioned memory may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. For example, the memory may also store information about the device type.

[0142] In the embodiment of the present application, the processor of the above-mentioned device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0143] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software units in a processor for execution. The software unit can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor executes the instructions in the memory, and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0144] An embodiment of the present application also provides a chip, which is applied to a first network device, and the chip is used to provide auxiliary information before a first cell in a target geographical area is switched to a second cell, wherein the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0145] An embodiment of the present application also provides a chip module, which is applied to a first network device. The chip module includes a transceiver component and a chip. The chip is used to provide auxiliary information through the transceiver component before a first cell in a target geographical area is switched to a second cell. The first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0146] An embodiment of the present application also provides a chip, which is applied to a second network device, and the chip is used to obtain auxiliary information before a first cell in a target geographical area is switched to a second cell, wherein the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0147] An embodiment of the present application also provides a chip module, which is applied to a second network device. The chip module includes a transceiver component and a chip. The chip is used to obtain auxiliary information through the transceiver component before a first cell in a target geographical area is switched to a second cell. The first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

[0148] An embodiment of the present application also provides a chip, which is applied to a terminal, and the chip is used to obtain auxiliary information before a first cell in a target geographical area is switched to a second cell, the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0149] An embodiment of the present application also provides a chip module, which is applied to a terminal. The chip module includes a transceiver component and a chip. The chip is used to obtain auxiliary information through the transceiver component before switching from a first cell to a second cell in a target geographical area. The first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device. The terminal is a terminal in a connected state or an INACTIVE state in the first cell.

[0150] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any method recorded in the above method embodiments.

[0151] The present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps of any method described in the above method embodiment. The computer program product may be a software installation package.

[0152] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0153] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0154] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0155] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0156] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0157] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, server or TRP, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0158] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing the relevant hardware through a program, and the program may be stored in a computer-readable memory, which may include a flash drive, ROM, RAM, a magnetic disk or an optical disk, etc.

[0159] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An information transmission method, characterized in that: Applied to a first network device, the method comprises: Before a first cell in a target geographical area is switched to a second cell, auxiliary information is provided, where the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the auxiliary information includes first notification information and / or second notification information; The first notification information includes context information, where the context information includes part or all of at least one context of at least one terminal in a connected state or an INACTIVE state in the first cell, and a sending timing of each context in part or all of the at least one context is before a time when the terminal corresponding to the context performs a radio link failure RLF-related operation of the first cell ends; The second notification information is configured by the first network device and is used to indicate that the RRC re-establishment request sent to the second cell does not carry the identification information of the first cell.

2. The method according to claim 1, characterized in that The first notification information also includes cache status report information, which includes part or all of at least one cache status report of the at least one terminal, and the cache status report refers to the cache status report corresponding to the moment when the first cell stops providing service to the target geographical area.

3. The method according to claim 2, characterized in that The buffer status report includes the amount of data to be transmitted.

4. The method according to any one of claims 1 to 3, characterized in that: The auxiliary information also includes third notification information and / or fourth notification information; The third notification information is used to indicate that the RRC re-establishment request from the terminal of the first cell does not carry the identification information of the first cell; The fourth notification information is used to indicate a time when the first cell stops covering the target geographical area and a time when the second cell starts covering the target geographical area.

5. The method according to claim 1 or 2, wherein providing auxiliary information comprises: providing the first notification information once; Alternatively, the first notification information is provided in multiple times.

6. The method according to claim 4, wherein providing auxiliary information comprises: The first notification information and / or the third notification information is sent to the second network device.

7. The method according to claim 2, characterized in that The sending timing of each buffer status report in part or all of the at least one buffer status report is before the end time when the terminal corresponding to the buffer status report performs an RRC re-establishment operation with the second network device.

8. The method according to claim 4, characterized in that The providing of auxiliary information includes: Send the second notification information and / or the fourth notification information to the at least one terminal.

9. An information transmission method, characterized in that: Applied to the second network device, the method comprises: Before a first cell in a target geographical area is switched to a second cell, auxiliary information is obtained, where the first cell is a cell corresponding to a first network device, and the second cell is a cell corresponding to the second network device, the auxiliary information includes first notification information, the first notification information includes context information, the context information includes part or all of at least one context of at least one terminal in the first cell, and a reception timing of each context in part or all of the at least one context is before the corresponding terminal ends executing radio link failure RLF related operations of the first cell.

10. The method according to claim 9, characterized in that The first notification information also includes cache status report information, which includes part or all of at least one cache status report of the at least one terminal, and the cache status report refers to the cache status report corresponding to the moment when the first cell stops providing service to the target geographical area.

11. The method according to claim 10, characterized in that The buffer status report includes the amount of data to be transmitted.

12. The method according to claim 9, characterized in that The auxiliary information also includes third notification information; the third notification information is used to indicate that the RRC re-establishment request from the terminal of the first cell does not carry the identification information of the first cell.

13. The method according to any one of claims 9 to 11, wherein obtaining auxiliary information comprises: receiving the first notification information once; Alternatively, the first notification information is received multiple times.

14. The method according to claim 12, characterized in that The obtaining of auxiliary information includes: The first notification information and / or the third notification information is received from the first network device.

15. The method according to claim 10, characterized in that A timing of receiving part or all of the at least one buffer status report is before a time when the corresponding terminal ends the RRC re-establishment operation with the second network device.

16. The method according to claim 10, characterized in that Before the first cell in the target geographical area is switched to the second cell, after obtaining the auxiliary information, the method further includes: If an RRC re-establishment request without identification information is obtained, obtaining PCI information of the first cell from a third network device, where the PCI information is used to indicate the PCI of the first cell; Determine, according to the PCI information, that the PCI of the terminal requesting the RRC re-establishment is the PCI of the first cell.

17. A data transmission method, characterized in that: Applied to a terminal, the method comprises: Before a first cell in a target geographical area is switched to a second cell, auxiliary information is obtained, where the first cell is a cell corresponding to a first network device, the second cell is a cell corresponding to a second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell, and the auxiliary information includes second notification information, where the second notification information is configured by the first network device and is used to indicate that an RRC re-establishment request sent to the second cell does not carry identification information of the first cell.

18. The method according to claim 17, characterized in that The auxiliary information also includes fourth notification information; the fourth notification information is used to indicate the time when the first cell stops covering the target geographical area and the time when the second cell starts covering the target geographical area.

19. The method according to claim 18, characterized in that After obtaining the auxiliary information, the method further includes: After the second cell covers the target geographical area, if the terminal completes the transmission of the first transmission block for a preset number of times, determining the remaining coverage duration of the first cell of the target geographical area according to fourth notification information; Determining whether the preset number of transmissions of the second transmission block can be completed according to the remaining coverage duration, the second transmission block being the first transmission block to be transmitted after the first transmission block; If the preset number of transmissions of the second transmission block can be completed, obtaining a transmission mode of the second transmission block, where the transmission mode includes transmission through the first cell or transmission through the second cell; The second transmission block is transmitted according to the transmission mode.

20. The method according to claim 19, characterized in that The transmission mode is determined by the terminal according to the delay budget residual of the second transmission block, or is configured by the first network device through at least one of RRC signaling and media access control control element MAC CE signaling.

21. The method according to claim 19, characterized in that The method further comprises: If the preset number of transmissions of the second transmission block cannot be completed, the second transmission block is transmitted through the second cell.

22. An information transmission device, characterized in that: Applied to a first network device, the apparatus comprises a unit for executing the method according to any one of claims 1 to 8, the apparatus comprising a processing unit and a communication unit: The processing unit is used to provide auxiliary information through the communication unit before switching from a first cell to a second cell in a target geographical area, the first cell being a cell corresponding to the first network device, and the second cell being a cell corresponding to the second network device.

23. An information transmission device, characterized in that: Applied to a second network device, the apparatus comprises a unit for executing the method according to any one of claims 9 to 16, the apparatus comprising a processing unit and a communication unit: The processing unit is used to obtain auxiliary information through the communication unit before switching from a first cell to a second cell in a target geographical area, the first cell being a cell corresponding to a first network device, and the second cell being a cell corresponding to the second network device.

24. An information transmission device, characterized in that: Applied to a terminal, the device comprises a unit for executing the method according to any one of claims 17 to 21, the device comprising a processing unit and a communication unit: The processing unit is used to obtain auxiliary information through the communication unit before the first cell in the target geographical area is switched to the second cell, the first cell is the cell corresponding to the first network device, the second cell is the cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

25. A first network device, characterized in that: The method comprises a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for executing the steps in the method according to any one of claims 1 to 8.

26. A second network device, characterized in that: The method comprises a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for executing the steps in the method according to any one of claims 9 to 16.

27. A terminal, characterized in that: The method comprises a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for executing the steps in the method according to any one of claims 17 to 21.

28. A computer-readable storage medium, characterized in that: It stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute the method as claimed in any one of claims 1 to 8, claims 9 to 16 and claims 17 to 21.

29. A chip, characterized in that: Applied to a first network device, the chip is used to execute the method described in any one of claims 1-8, and the chip is used to provide auxiliary information before a first cell in a target geographical area is switched to a second cell, the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

30. A chip module, characterized in that: Applied to a first network device, the chip module includes a transceiver component and a chip, the chip is used to execute the method described in any one of claims 1-8, the chip is used to provide auxiliary information through the transceiver component before switching from a first cell in a target geographical area to a second cell, the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

31. A chip, characterized in that: Applied to the second network device, the chip is used to execute the method described in any one of claims 9-16, and the chip is used to obtain auxiliary information before switching from a first cell in a target geographical area to a second cell, the first cell being a cell corresponding to the first network device, and the second cell being a cell corresponding to the second network device.

32. A chip module, characterized in that: Applied to the second network device, the chip module includes a transceiver component and a chip, the chip is used to execute the method described in any one of claims 9-16, the chip is used to obtain auxiliary information through the transceiver component before switching from a first cell in a target geographical area to a second cell, the first cell is a cell corresponding to the first network device, and the second cell is a cell corresponding to the second network device.

33. A chip, characterized in that: Applied to a terminal, the chip is used to execute the method described in any one of claims 17-21, and the chip is used to obtain auxiliary information before switching from a first cell in a target geographical area to a second cell, the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

34. A chip module, characterized in that: Applied to a terminal, the chip module includes a transceiver component and a chip, the chip is used to execute the method described in any one of claims 17-21, the chip is used to obtain auxiliary information through the transceiver component before switching from a first cell in a target geographical area to a second cell, the first cell is a cell corresponding to the first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connected state or an INACTIVE state in the first cell.

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