CN115551027B

CN115551027B - Information transmission method, device, network equipment and terminal

Info

Publication number: CN115551027B
Application number: CN202110745576.0A
Authority: CN
Inventors: 韩立锋
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2025-04-25
Anticipated expiration: 2041-06-30
Also published as: CN115551027A; WO2023274004A1

Abstract

The embodiment of the application discloses an information transmission method, an information transmission device, network equipment and a terminal, wherein the method is applied to first network equipment and comprises the following steps: and before a first cell of the target geographic area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment. Therefore, in the embodiment of the application, the auxiliary information is provided before the first cell of the first network device is switched to the second cell, so that the data interaction flow between the second network device and the terminal as well as between the second network device and the first network device is reduced, and the wireless resource is saved.

Description

Information transmission method, device, network equipment and terminal

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information transmission method, an information transmission device, a network device, and a terminal.

Background

With the development of the communication technology field, a terminal of a narrowband internet of things (Narrow Band Internet of Things, abbreviated as NB-IoT) type can transmit data through a wireless network, so as to interact information with a corresponding service server. The terminals such as water meter and ammeter report the water consumption and electricity consumption monthly through the fifth generation mobile communication technology (5 th Generation Mobile Communication Technology, abbreviated as 5G) network, thereby saving manual meter reading. The NB-IoT terminal accesses Liu Feiliu an access network (NTN), and data transmission between the NB-IoT terminal and the NB-IoT base station needs to detect a radio link failure in the original cell through the NB-IoT terminal, reselect to a new cell, and then reestablish a connection in the new cell through radio resource control (Radio Resource Control, abbreviated as RRC) reestablishment procedure to continue transmitting data.

At present, satellites used in NTN networks run quickly around the earth in the air, so, for NB-IoT terminals on the ground, in a state of relatively high-speed movement with the satellites, cells need to be replaced frequently, NB-IoT base stations corresponding to the replaced cells need to execute complex data interaction flows of NB-IoT base stations corresponding to the cells before replacement and terminals from the cells before replacement, and wireless resources are wasted.

Disclosure of Invention

The embodiment of the application provides an information transmission method, an information transmission device, network equipment and a terminal, which can reduce the data interaction flow between second network equipment and the terminal as well as between first network equipment and save wireless resources.

In a first aspect, an embodiment of the present application provides a transmission method, applied to a first network device, where the method includes:

and before a first cell of the target geographic area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment.

In a second aspect, an embodiment of the present application provides a transmission method, applied to a second network device, where the method includes:

And before a first cell of a target geographic area is switched to a second cell, acquiring auxiliary information, wherein the first cell is a cell corresponding to first network equipment, and the second cell is a cell corresponding to the second network equipment.

In a third aspect, an embodiment of the present application provides a transmission method, applied to a terminal, where the method includes:

Before a first cell of a target geographic area is switched to a second cell, auxiliary information is acquired, wherein the first cell is a cell corresponding to first network equipment, the second cell is a cell corresponding to second network equipment, and the terminal is a terminal in a connection state or an INACTIVE state in the first cell.

In a fourth aspect, an embodiment of the present application provides a transmission apparatus, applied to a first network device, where the apparatus includes a processing unit and a communication unit:

The processing unit is configured to provide auxiliary information through the communication unit before a first cell in a target geographic area is switched to a second cell, where 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.

In a fifth aspect, an embodiment of the present application provides a transmission apparatus, applied to a second network device, where the apparatus includes a processing unit and a communication unit:

The processing unit is configured to obtain auxiliary information through the communication unit before a first cell in a target geographic area is switched to a second cell, 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.

In a sixth aspect, an embodiment of the present application provides a transmission apparatus, applied to a terminal, where the apparatus includes a processing unit and a communication unit:

The processing unit is configured to obtain auxiliary information through the communication unit before a first cell in a target geographic area is switched to a second cell, where the first cell is a cell corresponding to a first network device, the second cell is a cell corresponding to the second network device, and the terminal is a terminal in a connection state or an INACTIVE state in the first cell.

In a 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 stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method according to any of the first aspects.

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 stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method according to any of the second aspects.

In a ninth aspect, an embodiment of the present application provides a terminal comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method according to any of the third aspects.

In a tenth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method as set forth in any one of the first, second and third aspects.

In an eleventh aspect, an embodiment of the present application provides a chip, which is applied to a first network device, where the chip is configured to provide auxiliary information before a first cell in a target geographic area is switched to a second cell, where 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.

In a twelfth aspect, an embodiment of the present application provides a chip, which is applied to a first network device, where the chip module includes a transceiver component and a chip, and the chip is configured to provide auxiliary information through the transceiver component before a first cell in a target geographic area is switched to a second cell, where 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.

In a thirteenth aspect, an embodiment of the present application provides a chip, which is applied to a second network device, where the chip is configured to obtain auxiliary information before a first cell in a target geographic area is switched to a second cell, where 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.

In a fourteenth aspect, an embodiment of the present application provides a chip module, which is applied to a second network device, where the chip module includes a transceiver component and a chip, and the chip is configured to obtain auxiliary information through the transceiver component before a first cell in a target geographic area is switched to a second cell, where 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.

In a fifteenth aspect, an embodiment of the present application provides a chip, which is applied to a terminal, where the chip is configured to obtain auxiliary information before a first cell in a target geographic area is switched to a second cell, 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 terminal is a terminal in a connected state or an INACTIVE state in the first cell.

In a sixteenth aspect, an embodiment of the present application provides a chip module, which is applied to a terminal, where the chip module includes a transceiver component and a chip, and the chip is configured to obtain auxiliary information through the transceiver component before a first cell in a target geographic area is switched to a second cell, 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.

According to the technical scheme provided by the application, the first network equipment provides auxiliary information before a first cell of a target geographic area is switched to a second cell, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment. Therefore, in the embodiment of the application, the auxiliary information is sent by the first network equipment, so that the data interaction flow between the second network equipment and the terminal as well as between the second network equipment and the first network equipment is reduced, and the wireless resource is saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2A is a schematic flow chart of an information transmission method according to an embodiment of the present application;

fig. 2B is an application scenario schematic diagram of an information transmission method according to an embodiment of the present application;

Fig. 2C is a schematic application scenario diagram of another information transmission method according to an embodiment of the present application;

Fig. 3A is a schematic flow chart of another information transmission method according to an embodiment of the present application;

fig. 3B is a schematic application scenario diagram of another information transmission method according to an embodiment of the present application;

fig. 3C is a schematic application scenario of another information transmission method according to an embodiment of the present application;

Fig. 4 is a block diagram showing functional units of an information transmission apparatus according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, software, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to a non-terrestrial network (non-TERRESTRIAL NETWORK, NTN) communication system, and the NTN communication system generally adopts a satellite communication mode to provide communication service for a terrestrial terminal.

Reference to "at least one" in embodiments of the application means one or more, and "plurality" means two or more. "and/or" describes an association of associated objects, meaning that there may be three relationships, e.g., A and/or B, and that there may be A alone, while A and B are present, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one of a, b or c may represent a, b, c, a and b, a and c, b and c, or a, b and c, wherein each of a, b, c may itself be an element or a collection comprising one or more elements.

And, unless specified to the contrary, references to "first," "second," etc. ordinal words of embodiments of the present application are used for distinguishing between multiple objects and are not used for limiting the order, timing, priority, or importance of the multiple objects. For example, the first information and the second information are only for distinguishing different information, and are not indicative of the difference in content, priority, transmission order, importance, or the like of the two information.

The "connection" in the embodiment of the present application refers to various connection manners such as direct connection or indirect connection, so as to implement communication between devices, which is not limited in the embodiment of the present application.

Embodiments of the present application are described in connection with terminals, satellites, and network devices. Which will be described in detail below.

Specifically, the terminal in the embodiment of the present application may be a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, a user agent, or a user apparatus. The terminal may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a relay device, an in-vehicle 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 network (public land mobile network, PLMN), etc., without specific limitation.

Further, the terminal can be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted, on water (e.g., ship, etc.), or in air (e.g., airplane, balloon, satellite, etc.).

Further, the terminal may be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a vehicle-mounted device in unmanned (SELF DRIVING), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (SMART GRID), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (SMART CITY) or a wireless terminal device in smart home (smart home), or the like.

In particular, the satellite in embodiments of the application may be a spacecraft carrying a bent-tube payload (bent pipe payload) or a regenerative payload (REGENERATIVE PAYLOAD) signal transmitter, which typically runs on a Low Earth Orbit (LEO) at a height between 300 and 1500km, a mid earth orbit (medium earth orbit, MEO) at a height between 7000 and 25000km, a synchronized earth orbit (geostationary earth orbit, GEO) at a height of 35786km, or a high elliptical orbit (HIGH ELLIPTICAL orbit, HEO) at a height between 400 and 50000 km. That is, the satellites may be LEO satellites, MEO satellites, GEO satellites, HEO satellites, or the like according to the orbit heights.

Further, satellites in NTN communication systems typically generate one or more beams (or "beam antennas") on the ground, and the one or more beams form cells on the ground.

Specifically, the network device (including the first network device and the second network device) in the embodiment of the present application may be a base station (base transceiver station, BTS) in a global system for mobile communications (global system of mobile communication, GSM) communication system or a code division multiple access (code division multiple access, CDMA) communication system, a base station (nodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) communication system, an evolved base station (evolutional node B, eNB or eNodeB) in a long term evolution (long term evolution, LTE) communication system, or a base station (gNB) in a New Radio (NR) communication system. The network device may 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.

It should be noted that in some network deployments, the gNB may include a centralized unit (centralized unit, CU) and a Distributed Unit (DU), while the gNB may also include an active antenna unit (ACTIVE ANTENNA unit, AAU). Wherein, a CU may implement part of the functionality of the gNB, while a DU may also implement part of the functionality of the gNB. For example, a CU is responsible for handling non-real-time protocols and services, implementing the functions of a radio resource control (radio resource control, RRC) layer and a packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer, and a DU is responsible for handling physical layer protocols and real-time services, implementing the functions of a radio link control (radio link control, RLC) layer, a medium access control (medium access control, MAC) layer, and a Physical (PHY) layer. In addition, the AAU realizes partial physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become or be converted from the information of the PHY layer, higher layer signaling (e.g., RRC layer signaling) may be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may include devices of one or more of CU nodes, DU nodes, AAU nodes. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not particularly limited.

Exemplary, a communication system to which embodiments of the present application are applied is shown in fig. 1. 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. The terminal a 10, the first network device 120, and the second network device 130 may be located on the surface of the earth, while the satellites 160, 170 are located in orbit. The satellite 160 may provide communication services to a first cell 140 to a target geographic area of signal coverage and may communicate with a first terminal 10 located within the signal coverage area, the satellite 170 may provide communication services to a second cell 150 to a target geographic area of signal coverage and may communicate with a first terminal 110 located within the signal coverage area, and the second cell 150 is the first cell to cover the target geographic area after the first cell 140.

The information transmission method according to the embodiment of the present application will be described with reference to the communication system shown in fig. 1.

Fig. 2A is a schematic flow chart of an information transmission method according to an embodiment of the present application, and as shown in fig. 2A, the information transmission specifically includes the following steps:

S101, the first network device provides auxiliary information to the second network device before the first cell of the target geographic area is handed over to the second cell.

S102, the second network device receives the auxiliary information from the first network device before the first cell is handed over to the second cell.

As a specific embodiment, the providing the auxiliary information refers to transmitting the auxiliary information to the target node.

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 geographic area may be a geographic area that can be covered by either the first cell or the second cell of the earth's surface.

The handover of a first cell to a second cell of a target geographical area refers to a handover of a cell serving the target area from the first cell to the second cell.

In this example, after the second cell provides the service for the target geographic area, the auxiliary information which is originally required to be acquired by the second network device in the data interaction process between the terminal and the second network device in the target geographic area is already acquired before the first cell is switched to the second cell, so that the auxiliary information can be directly used, the data interaction process between the terminal and the second network device is reduced, the energy consumption of the terminal is saved, and meanwhile, the wireless resource is saved.

The auxiliary information comprises, but is not limited to, first notification information and/or third notification information, wherein the first notification information comprises context information and/or buffer status report information, the context information comprises part or all of at least one context of at least one terminal in a connection state or an INACTIVE state in the first cell, the buffer status report information comprises part or all of at least one buffer status report of the at least one terminal, the buffer status report refers to a buffer status report corresponding to a moment when the terminal stops providing services to the target geographic area in the first cell, and the third notification information is used for indicating that an RRC reestablishment request of the terminal from the first cell does not carry identification information of the first cell.

The identification information of the first cell may be, for example, a physical cell identification PCI of the first cell, a global cell identification CGI of the first cell, or other forms of identification information of the first cell.

The number of the at least one terminal is not particularly limited, and it can be understood that one of the terminals corresponds to one context and/or one buffer status report.

Further, the buffer status report may include, but is not limited to, an amount of data to be transmitted.

In a possible embodiment, the implementation manner of providing the auxiliary information to the second network device may be that the first notification information is sent to the second network device once, or the first notification information is sent to the second network device in multiple times. The number of times may be 3 times, 5 times, 10 times, 100 times, and the like, and is not specifically limited, and the number of contexts and/or the number of buffer status reports in the first notification information sent each time are not specifically limited.

In a possible embodiment, the transmission occasion of each context in part or all of the at least one context is before the end time of the radio link failure RLF related operation of the first cell by the terminal corresponding to the context.

For example, the at least one terminal includes terminal a, terminal b, terminal c, and terminal d. The at least one context includes a context a corresponding to the terminal a, a context B corresponding to the terminal B, a context C corresponding to the terminal C, and a context D corresponding to the terminal D. If the end time of the terminal a executing the RLF related operation to the first network device is time 1, the end time of the terminal B executing the RLF related operation to the first network device is time 1, the end time of the terminal C executing the RLF related operation to the first network device is time 2, the sending time of the context a and the sending time of the context B are before time 1, the sending time of the context C is before time 2, and the sending time of the context D is before time 3.

It should be noted that, if the first network device sends the context of the terminal to the second network device before the end time when the terminal performs the RLF related operation of the radio link failure 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 reestablishment procedure between the terminal and the second cell. And acquiring the context of the terminal, so that the flow of the second network equipment requesting the context of the terminal from the first network equipment is reduced in the RRC reestablishment process of the terminal and the second cell, and the RRC reestablishment rapidity of the terminal and the second cell is improved.

In a specific application scenario, as shown in fig. 2B, the UE is in a target geographic area, the process of switching the Cell 1 of the target geographic area to the Cell 2 is performed, from the time of T1 to the time of stopping serving the target geographic area for the Cell 1, the UE enters the RLF process of the base station corresponding to the Cell 1, after the RLF process is completed, the UE enters the RRC reestablishment process corresponding to the Cell 2, after the UE enters the RLF process and the RRC reestablishment process, the UE cannot transmit data, the base station corresponding to the Cell 1 sends the context of the UE to the base station corresponding to the Cell 2 before the end time T2 of the UE performing the RLF related operation of the base station, because the base station corresponding to the Cell 2 has acquired the context of the UE from the base station corresponding to the Cell 1, and referring to fig. 2C, the base station corresponding to the Cell 1 does not send the context of the UE to the base station corresponding to the Cell 2 before the time T2, if the base station corresponding to the Cell 2 is required to acquire the context of the Cell 2 in the RRC process corresponding to the Cell 2, and the base station corresponding to the Cell 2 is not required to acquire the context of the Cell 2 in the Cell 2, as shown in the RRC process of the Cell 2 is not required, and the base station corresponding to the Cell 2 is required to be reestablished by the base station corresponding to the Cell 2.

In a possible embodiment, the sending occasion 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 reestablishment operation with the second network device.

For example, the at least one terminal includes terminal a, terminal b, terminal c, and terminal d. The at least one buffer status report includes a buffer status report a corresponding to the terminal a, a buffer status report B corresponding to the terminal B, a buffer status report C corresponding to the terminal C, and a buffer status report D corresponding to the terminal D. If the end time of the terminal a performing the RRC reestablishment operation with the second network device is time 1, the end time of the terminal B performing the RRC reestablishment operation with the second network device is time 1, the end time of the terminal C performing the RRC reestablishment operation with the second network device is time 2, and the end time of the terminal B performing the RRC reestablishment operation with the second network device is time 2, the transmission time of the buffer status report a and the buffer status report B are before time 1, the transmission time of the buffer status report C is before time 2, and the transmission time of the buffer status report D is before time 3.

It should be noted that, if the first network device sends the buffer status report (such as the data volume to be transmitted) of the terminal to the second network device before the end time of the RRC reestablishment operation performed by the terminal with the second network device, after the terminal accesses the second cell, the data volume to be transmitted does not need to be sent to the second network device.

In a specific application scenario, as shown in fig. 2C, the UE is in a target geographic area, the Cell 1 of the target geographic area is switched to the Cell 2, from the time T1, the time T1 is the time when the Cell 1 stops serving the target geographic area, the UE enters the RLF procedure of the base station corresponding to the Cell 1, after the RLF procedure is completed, the UE enters the RRC reestablishment procedure corresponding to the Cell 2, after the RLF procedure and the RRC reestablishment procedure are completed, the UE performs data transmission with the base station corresponding to the Cell 1, and before the end time T2 of the UE performing the RRC reestablishment operation with the second network device, the base station corresponding to the Cell 1 sends the data amount to be transmitted of the UE (the data amount to be transmitted corresponding to the time when the UE stops providing service to the target geographic area at the time of the Cell 1) to the base station corresponding to the Cell 2.

In one possible embodiment, the auxiliary information includes the third notification information, and the second network device further includes, after receiving the auxiliary information from the first network device before the first cell is handed over to the second cell, if an RRC reestablishment request that does not carry identification information is obtained, the second network device obtains PCI information of the first cell from the third network device, where the PCI information is used to indicate the PCI of the first cell, and the second network device determines, according to the PCI information, that the PCI of the terminal of the RRC reestablishment request is the PCI of the first cell.

That is, the second cell can be configured by the third network device, knowing that the last cell covering the target geographical area is the first cell.

By way of example, another information transmission method provided by the embodiment of the present application is provided. The terminal obtains the auxiliary information before the first cell of the target geographic area is switched to the 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 connection state or an INACTIVE state in the first cell.

The auxiliary information comprises second notification information and/or fourth notification information, wherein the second notification information is used for indicating that an RRC reestablishment request sent to the second cell does not carry identification information of the first cell, and the fourth notification information is used for indicating the moment when the first cell stops covering the target geographic area and the moment when the second cell starts covering the target geographic area.

In this example, before the terminal in the connected state or INACTIVE state in the first cell switches to the second cell in the target geographic area, the terminal obtains the auxiliary information, and after the second cell provides the service for the target geographic area, the terminal directly performs data interaction with the second network device based on the auxiliary information.

Wherein the second notification information is configured by the first network device.

In practical application, in order to ensure that the base stations corresponding to the UE and the Cell 2 acquire information consistency in the RRC reestablishment procedure. The third notification information may be sent to the second network device by the first network device before the Cell 1 in the target geographic area is switched to the Cell 2 (see description of the third notification information in method example 1, which is not repeated herein), or the third notification information of the second network device corresponding to the Cell 2 may be specified by a protocol.

It should be clear that, in practical applications, the second notification information and the third notification information are cooperatively present.

If the second notification information is configured by the first network device, referring to fig. 3A, fig. 3A is a flowchart of another information transmission processing method according to an embodiment of the present application, and as shown in fig. 3A, the information transmission processing method specifically includes the following steps.

S201, the first network device provides auxiliary information to the terminal before the first cell of the target geographic area is handed over to the second cell.

S201, the terminal receives auxiliary information from the first network device before the first cell is handed over to the second cell.

In this case, in order to ensure that the base stations corresponding to the UE and the Cell 2 acquire information consistency in the RRC reestablishment procedure. The first network device may also send third notification information to the second network device before the first cell is handed over to the second cell.

In a specific application scenario, as shown in fig. 3B, the UE is in a target geographic area, the Cell 1 of the target geographic area is switched to the Cell 2, from the time T1 to the time when the Cell 1 stops serving the target geographic area, the UE enters an RLF procedure of a base station corresponding to the Cell 1, after the RLF procedure is completed, the UE enters an RRC reestablishment procedure corresponding to the Cell 2, before T1, if the base station corresponding to the Cell 1 sends second indication information to the UE and sends third indication information to the base station corresponding to the Cell 2, in the RLF procedure, the UE generates an RRC reestablishment request not carrying identification information of the Cell 1 based on the second indication information and sends the RRC reestablishment request to the base station corresponding to the Cell 2, and after the base station corresponding to the Cell 2 receives the RRC reestablishment request, it is determined that the UE is from the Cell 1 based on the third indication information, and it can be known that the previous Cell 1 covering the current geographic area is obtained by receiving PCI information from the third network device.

In one possible embodiment, the auxiliary information includes the fourth known information, after the terminal obtains the auxiliary information, the method further includes that after the second cell covers the target geographic area, if the terminal completes transmission of a first transmission block for a preset number of times, determining remaining coverage duration of the first cell in the target geographic area according to the fourth known information, where the second transmission block is a first transmission block to be transmitted after the first transmission block, determining whether transmission of the second transmission block for the preset number of times can be completed according to the remaining coverage duration, if transmission of the second transmission block for the preset number of times can be completed, obtaining a transmission mode of the second transmission block by the terminal, where the transmission mode includes transmission through the first cell or transmission through the second cell, and transmitting the second transmission block according to the transmission mode by the terminal.

The preset number of times is preset, and may be 3 times, 4 times, 8 times, etc., without specific limitation.

In a possible embodiment, the transmission mode is determined by the terminal according to a delay budget remaining amount of the second transport block, or the first network device is configured through at least one of RRC signaling and medium access control cell MAC CE signaling.

The implementation manner of the transmission manner determined by the terminal according to the delay budget remaining amount of the second transmission block specifically includes judging whether the delay budget of the second transmission block is greater than a threshold, determining that the transmission manner is to transmit the transmission block to be transmitted through the second cell if the delay budget is greater than the threshold, and determining that the transmission manner is to transmit through the first cell if the delay budget is less than the threshold.

In one possible embodiment, if the preset number of transmissions of a second transport block cannot be completed, the second transport block is transmitted through the second cell.

In a specific application scenario, as shown in fig. 3C, when the UE is in the target geographic area, T1 is the time when Cell 1 stops serving the target geographic area, T4 is the time when Cell 2 starts serving the target geographic area, a period between T1 and T4 is a period when Cell 1 serves the target geographic area and there is a coincidence between Cell 2 serving the target geographic area, if the base station corresponding to Cell 1 sends fourth indication information to the UE before T4, and if the UE completes repeating transmission of the transport block TB 1N times after T1, the remaining coverage duration of Cell 1 in the target geographic area is determined based on the fourth indication information, so as to further obtain a transmission mode for TB2 that needs to be transmitted after TB 1.

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

And for the first equipment, before a first cell of the target geographic area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment. Wherein the auxiliary information includes at least one of first notification information, second notification information, third notification information, and fourth notification information. Optionally, the providing auxiliary information comprises providing the first notification information once or providing the first notification information in multiple times. Optionally, the providing auxiliary information includes sending the first notification information and/or the third notification information to the second network device. Optionally, the providing auxiliary information includes sending the second notification information and/or the fourth notification information to the at least one terminal.

The method comprises the steps of acquiring auxiliary information before a first cell of a target geographic area is switched to a second cell, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment. Wherein the auxiliary information comprises first notification information and/or third notification information. Optionally, the acquiring the auxiliary information comprises receiving the first notification information once or receiving the first notification information in multiple times. Optionally, the acquiring auxiliary information includes receiving the first notification information and/or the third notification information from the first network device. Further, the auxiliary information comprises the third notification information, and after the auxiliary information is acquired before the first cell of the target geographic area is switched to the second cell, the method further comprises the steps of acquiring PCI information of the first cell from third network equipment if an RRC reestablishment request which does not carry identification information is acquired, wherein the PCI information is used for indicating the PCI of the first cell, and determining that the PCI of the terminal of the RRC reestablishment request is the PCI of the first cell according to the PCI information.

The method comprises acquiring auxiliary information before a first cell of a target geographic area is handed over to a second cell. Wherein the auxiliary information comprises second notification information and/or fourth notification information. Wherein the second notification information is configured by the first network device. Further, the auxiliary information comprises fourth known information, after the auxiliary information is obtained, the method further comprises the steps of determining remaining coverage time of a first cell of the target geographic area according to the fourth known information if the terminal completes transmission of the first transport block after the second cell covers the target geographic area, determining whether transmission of the second transport block for the preset times can be completed according to the remaining coverage time, and obtaining a transmission mode of the second transport block if the transmission of the second transport block for the preset times can be completed, wherein the transmission mode comprises transmission through the first cell or transmission through the second cell, and transmitting the second transport block according to the transmission mode. The transmission mode is determined by the terminal according to the delay budget residual quantity of the second transmission block, or the first network equipment is configured through at least one of RRC signaling and Media Access Control (MAC) CE signaling. Optionally, if the transmission of the second transport block cannot be completed for the preset number of times, the second transport block is transmitted through the second cell.

The method comprises the steps of aiming at 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 connection state or an INACTIVE state in the first cell.

For the first network device and the second network device, a transmission opportunity (including a transmission opportunity and an acceptance opportunity) of each context in part or all of the at least one context is before an end time of the radio link failure RLF-related operation of the first cell performed by a terminal corresponding to the context. The transmission opportunity (including the sending opportunity and the receiving opportunity) of each buffer status report in part or all of the at least one buffer status report is before the end time of the terminal corresponding to the buffer status report executing the RRC reestablishment operation with the second network device.

In addition, the first notification information includes context information and/or buffer 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 buffer status report information includes part or all of at least one buffer status report of the at least one terminal, the buffer status report is corresponding to a time when the terminal stops providing service to the target geographic area at the first cell, the second notification information is used for indicating that a Radio Resource Control (RRC) reestablishment request sent to the second cell does not carry identification information of the first cell, the third notification information is used for indicating that an RRC reestablishment request of the terminal from the first cell does not carry identification information of the first cell, and the fourth notification information is used for indicating a time when the terminal stops covering the target geographic area and a time when the second cell starts covering the target geographic area. The buffer status report includes an amount of data to be transmitted.

The foregoing description of the embodiments of the present application has been presented primarily in terms of a method-side implementation. It will be appreciated that the electronic device, in order to achieve the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Referring to fig. 4, fig. 4 is a block diagram illustrating functional units of an information transmission apparatus 400 according to an embodiment of the present application, where the apparatus 400 may be a first network device, the apparatus 400 may be a second network device, and the apparatus 400 may be a terminal, and the apparatus 400 includes a communication unit 410 and a processing unit 420.

In a possible implementation manner, the apparatus 400 is configured to perform each flow and step corresponding to the first network device in the above-mentioned transmission method.

The processing unit is configured to provide, by using the communication unit 410, auxiliary information before a first cell in a target geographic area is switched to a second cell, where 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.

In one possible example, the assistance information includes at least one of first notification information including context information and/or buffer status report information, the context information including part or all of at least one context of at least one terminal in the first cell, second notification information including part or all of at least one buffer status report of the at least one terminal at a time point when the first cell stops providing service to the target geographic area, third notification information indicating that a Radio Resource Control (RRC) reestablishment request transmitted to the second cell does not carry identification information of the first cell, and fourth notification information indicating that a Radio Resource Control (RRC) reestablishment request from the terminal in the first cell does not carry identification information of the first cell, the buffer status report information including part or all of at least one buffer status report of the at least one terminal, the buffer status report being a buffer status report corresponding to a time point when the terminal stops providing service to the target geographic area, the second notification information indicating a time point when the RRC reestablishment request from the first cell stops carrying identification information of the first cell, and the target geographic area.

In one possible example, the buffer status report includes an amount of data to be transmitted.

In one possible example, in terms of the providing auxiliary information, the processing unit 420 is specifically configured 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.

In one possible example, in terms of the providing auxiliary information, the processing unit 420 is specifically configured to send the first notification information and/or the third notification information to the second network device through the communication unit 410.

In one possible example, the transmission opportunity of each context in part or all of the at least one context is before the end time of the radio link failure RLF-related operation of the first cell by the terminal corresponding to the context.

In one possible example, the transmission opportunity 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 reestablishment operation with the second network device.

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

In another possible implementation manner, the apparatus 400 is configured to perform each flow and step corresponding to the second network device in the above-mentioned transmission method.

In one possible example, the assistance information includes first notification information and/or third notification information, the first notification information includes context information and/or buffer 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 buffer status report information includes part or all of at least one buffer status report of the at least one terminal, the buffer status report refers to a buffer status report corresponding to a time when the terminal stops providing services to the target geographic area in the first cell, and the third notification information is used for indicating that an RRC reestablishment request of the terminal from the first cell does not carry identification information of the first cell.

In one possible example, in terms of the acquisition assistance information, the processing unit 420 is specifically configured to receive the first notification information once through the communication unit 410, or to receive the first notification information multiple times through the communication unit 410.

In one possible example, in terms of the acquisition assistance information, the processing unit 420 is specifically configured to receive the first notification information and/or the third notification information from the first network device via the communication unit 410.

In one possible example, the reception occasion of each of some or all of the at least one context is before the end time of the corresponding terminal performing the radio link failure RLF related operation of the first cell.

In one possible example, some or all of the reception opportunities in the at least one buffer status report are before an end time of the corresponding terminal performing an RRC reestablishment operation with the second network device.

In one possible example, the auxiliary information includes the third notification information, and the processing unit 420 is further configured to, if an RRC reestablishment request that does not carry identification information is obtained through the communication unit 410, obtain, through the communication unit 410, PCI information of a first cell to a third network device, where the PCI information is used to indicate a PCI of the first cell, and determine, according to the PCI information, that a PCI of a terminal of the RRC reestablishment request is a PCI of the first cell.

In another possible implementation manner, the apparatus 400 is configured to execute each flow and step corresponding to the terminal in the above-mentioned transmission method.

The processing unit is configured to obtain, by using the communication unit 410, auxiliary information before a first cell in a target geographic area is switched to a second cell, 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 terminal is a terminal in a connected state or an INACTIVE state in the first cell.

In one possible example, the auxiliary information includes second notification information and/or fourth notification information, where the second notification information is used to indicate that the RRC reestablishment request sent to the second cell does not carry the identification information of the first cell, and the fourth notification information is used to indicate a time when the first cell stops covering the target geographic area and a time when the second cell starts covering the target geographic area.

In one possible example, the second notification information is configured by the first network device.

In one possible example, the auxiliary information includes the fourth notification information, and the processing unit 420 is further configured to determine, after the auxiliary information is obtained by the communication unit 410 and after the second cell covers the target geographic area, if the terminal completes transmission of a first transmission block for a preset number of times, according to the fourth notification information, a remaining coverage duration of the first cell in the target geographic area, where the second transmission block is a first transmission block to be transmitted after the first transmission block, determine, according to the remaining coverage duration, whether the transmission of the second transmission block for the preset number of times can be completed, and if the transmission of the second transmission block for the preset number of times can be completed, obtain a transmission mode of the second transmission block, where the transmission mode includes transmission through the first cell or transmission through the second cell, and transmit the second transmission block according to the transmission mode.

In one possible example, the transmission manner is determined by the terminal according to a delay budget remaining amount of the second transport block, or the first network device is configured through at least one of RRC signaling and medium access control cell MAC CE signaling.

In one possible example, the second transport block is transmitted via the second cell if the preset number of transmissions of the second transport block cannot be completed.

It may be understood that the functions of each program module of the transmission apparatus according to the embodiments of the present application may be specifically implemented according to the method in the embodiments of the method, and the specific implementation process may refer to the relevant description of the embodiments of the method, which is not repeated herein.

It should be appreciated that the apparatus 400 herein is embodied in the form of functional units. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 400 may be specifically a terminal and a network device in the foregoing embodiment, and the apparatus 400 may be configured to perform each flow and/or step corresponding to the first network device, the second network device, and the terminal in the foregoing method embodiment, which is not described herein for avoiding repetition.

The apparatus 400 of each embodiment has a function of implementing corresponding steps executed by the first network device, the second network device, and the terminal in the method, where the function may be implemented by hardware or implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above, for example, the processing unit 420 may be replaced by a processor, and the communication unit 410 may be replaced by a transmitter and a receiver, to perform the transceiving operations and the related processing operations in the respective method embodiments, respectively.

In an embodiment of the present application, the apparatus 400 in fig. 4 may also be a chip, a chip module, a UE, or a system on chip (SoC), for example. Correspondingly, the communication unit 410 may be a transceiver circuit of the chip, which is not limited herein.

Referring to fig. 5, fig. 5 is an electronic device according to an embodiment of the present application, which includes one or more processors, one or more memories, one or more communication interfaces, and one or more programs stored in the memories and configured to be executed by the one or more processors.

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

In another possible implementation manner, the electronic device is a second network device, and the program includes instructions for performing the following steps:

In a possible implementation manner, the electronic device is a terminal, and the program includes instructions for performing the following steps:

All relevant contents of each scenario related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

It should be appreciated that the memory described above may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type.

In an embodiment of the present application, the processor of the above apparatus may be a central processing unit (Central Processing Unit, CPU), which 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, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software elements in the processor for execution. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor executes instructions in the memory to perform the steps of the method described above in conjunction with its hardware. To avoid repetition, a detailed description is not provided herein.

The embodiment of the application also provides a chip which is applied to the first network equipment and is used for providing auxiliary information before a first cell of a target geographic area is switched to a second cell, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment.

The embodiment of the application also provides a chip module which is applied to the first network equipment, wherein the chip module comprises a receiving and transmitting component and a chip, and the chip is used for providing auxiliary information through the receiving and transmitting component before a first cell of a target geographic area is switched to a second cell, the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment.

The embodiment of the application also provides a chip applied to the second network equipment, which is used for acquiring auxiliary information before a first cell of a target geographic area is switched to a second cell, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment.

The embodiment of the application also provides a chip module which is applied to the second network equipment, wherein the chip module comprises a receiving and transmitting component and a chip, and the chip is used for acquiring auxiliary information through the receiving and transmitting component before a first cell of a target geographic area is switched to a second cell, wherein the first cell is a cell corresponding to the first network equipment, and the second cell is a cell corresponding to the second network equipment.

The embodiment of the application also provides a chip which is applied to the terminal and is used for acquiring auxiliary information before a first cell in a target geographic area is switched to a second cell, wherein the first cell is a cell corresponding to the first network equipment, the second cell is a cell corresponding to the second network equipment, and the terminal is a terminal in a connection state or an INACTIVE state in the first cell.

The embodiment of the application also provides a chip module which is applied to the terminal, wherein the chip module comprises a receiving and transmitting component and a chip, the chip is used for acquiring auxiliary information through the receiving and transmitting component before a first cell of a target geographic area is switched to a second cell, the first cell is a cell corresponding to the first network equipment, the second cell is a cell corresponding to the second network equipment, and the terminal is a terminal in a connection state or an INACTIVE state in the first cell.

The embodiment of the present application also provides a computer storage medium storing a computer program for electronic data exchange, where the computer program causes a computer to execute some or all of the steps of any one of the methods described in the above method embodiments.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform part or all of the steps of any one of the methods described in the method embodiments above. The computer program product may be a software installation package.

It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and the division of elements, such as those described above, is merely a logical function division, and may be implemented in other manners, such as multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present application.

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

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be embodied essentially or partly in the form of a software product or all or part of the technical solution, which is stored in a memory, and includes several instructions for causing a computer device (which may be a personal computer, a server, or TRP, etc.) to perform all or part of the steps of the method of the embodiments of the present application. The Memory includes a U disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, etc. which can store the program codes.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be implemented by a program that instructs associated hardware, and the program may be stored in a computer readable memory, which may include a flash disk, a ROM, a RAM, a magnetic disk, an optical disk, etc.

The foregoing has outlined rather broadly the more detailed description of embodiments of the application, wherein the principles and embodiments of the application are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. An information transmission method, applied to a first network device, comprising:

Before a first cell of a target geographic area is switched to a second cell, auxiliary information is provided, wherein the first cell is a cell corresponding to first network equipment, the second cell is a cell corresponding to second network equipment, and the auxiliary information comprises first notification information and/or second notification information;

The first notification information includes context information, where the context information includes a 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 transmission timing of each context in the part or all of the at least one context is before an end time of a radio link failure RLF related operation of the first cell performed by a terminal corresponding to the context;

The second notification information is configured by the first network device and is used for indicating that the RRC reestablishment request sent to the second cell does not carry the identification information of the first cell.

2. The method of claim 1, wherein the first notification information further comprises buffer status report information, the buffer status report information including part or all of at least one buffer status report of the at least one terminal, the buffer status report corresponding to a time when the terminal stops providing service to the target geographic area at the first cell.

3. The method of claim 2, wherein the buffer status report includes an amount of data to be transmitted.

4. A method according to any of claims 1-3, characterized in that the auxiliary information further comprises third and/or fourth notification information;

The third notification information is used for indicating that the RRC reestablishment request of the terminal from 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 geographic area and a time when the second cell starts covering the target geographic area.

5. The method of claim 1 or 2, the providing auxiliary information comprising:

the first notification information is provided once or provided in a plurality of times.

6. The method of claim 4, the providing auxiliary information comprising:

And sending the first notification information and/or the third notification information to the second network equipment.

7. The method of claim 2, wherein a transmission occasion of each of some or all of the at least one buffer status report is before an end time at which a terminal corresponding to the buffer status report performs an RRC reestablishment operation with the second network device.

8. The method of claim 4, wherein providing the auxiliary information comprises:

And sending the second notification information and/or the fourth notification information to the at least one terminal.

9. An information transmission method, applied to a second network device, comprising:

Before a first cell of a target geographic area is switched to a second cell, the first cell is a cell corresponding to a first network device, the second cell is a cell corresponding to the second network device, the auxiliary information comprises first notification information, the first notification information comprises context information, the context information comprises part or all of at least one context of at least one terminal in the first cell, and a receiving opportunity of each context in part or all of the at least one context is before an ending moment of the corresponding terminal executing Radio Link Failure (RLF) related operation of the first cell.

10. The method of claim 9, wherein the first notification information further includes buffer status report information, the buffer status report information including a part or all of at least one buffer status report of the at least one terminal, the buffer status report corresponding to a time when the terminal stops providing service to the target geographical area at the first cell.

11. The method of claim 10, wherein the buffer status report includes an amount of data to be transmitted.

12. The method of claim 9, wherein the assistance information further comprises third notification information indicating that the request for RRC reestablishment from the terminal of the first cell does not carry the identification information of the first cell.

13. The method according to any of claims 9-11, the acquiring auxiliary information, comprising:

the first notification information is received once or divided into a plurality of times.

14. The method of claim 12, wherein the acquiring the auxiliary information comprises:

The first notification information and/or the third notification information from the first network device are received.

15. The method of claim 10, wherein a reception opportunity of a part or all of the at least one buffer status report is before an end time of a corresponding terminal performing an RRC reestablishment operation with the second network device.

16. The method of claim 10, wherein after acquiring the assistance information before the first cell of the target geographic area is handed over to the second cell, the method further comprises:

if the RRC reestablishment request which does not carry the identification information is obtained, PCI information of a first cell is obtained from third network equipment, wherein the PCI information is used for indicating the PCI of the first cell;

And determining the PCI of the terminal of the RRC reestablishment request as the PCI of the first cell according to the PCI information.

17. A data transmission method, applied to a terminal, the method comprising:

Before a first cell of a target geographic area is switched to a second cell, auxiliary information is acquired, the first cell is a cell corresponding to a first network device, the second cell is a cell corresponding to a second network device, the terminal is a terminal in a connection state or an INACTIVE state in the first cell, the auxiliary information comprises second notification information, and the second notification information is configured by the first network device and is used for indicating that an RRC reestablishment request sent to the second cell does not carry identification information of the first cell.

18. The method of claim 17, wherein the assistance information further comprises fourth notification information indicating when the first cell ceases to cover the target geographic area and when the second cell begins to cover the target geographic area.

19. The method of claim 18, wherein after the obtaining the auxiliary information, the method further comprises:

After the second cell covers the target geographic area, if the terminal completes the transmission of the first transmission block for the preset times, determining the residual coverage duration of the first cell of the target geographic area according to fourth known information;

judging whether the transmission of the second transmission block for the preset times can be completed or not according to the residual coverage time length, wherein the second transmission block is the first transmission block to be transmitted after the first transmission block;

if the transmission of the second transmission block can be completed for the preset times, acquiring a transmission mode of the second transmission block, wherein the transmission mode comprises transmission through the first cell or transmission through the second cell;

and transmitting the second transmission block according to the transmission mode.

20. The method of claim 19, wherein the transmission mode is determined by the terminal according to a delay budget remaining amount of the second transport block or is configured by the first network device through at least one of RRC signaling and medium access control (MAC CE) signaling.

21. The method of claim 19, wherein the method further comprises:

And if the transmission of the second transmission block for the preset times cannot be completed, transmitting the second transmission block through the second cell.

22. An information transmission apparatus, applied to a first network device, the apparatus comprising means for performing the method of any of claims 1-8, the apparatus comprising a processing unit and a communication unit:

23. An information transmission apparatus, characterized in that it is applied to a second network device, the apparatus comprising means for performing the method according to any of claims 9-16, the apparatus comprising a processing unit and a communication unit:

24. An information transmission apparatus, characterized in that it is applied to a terminal, the apparatus comprising means for performing the method according to any of claims 17-21, the apparatus comprising a processing unit and a communication unit:

25. A first network device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-8.

26. A second network device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 9-16.

27. A terminal comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 17-21.

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

29. A chip for use in a first network device, the chip being configured to perform the method according to any of claims 1-8, the chip being configured to provide assistance information before a first cell of a target geographical area is handed over to a second cell, the first cell being a cell corresponding to the first network device, the second cell being a cell corresponding to the second network device.

30. A chip module, characterized in that it is applied to a first network device, and the chip module includes a transceiver component and a chip, where the chip is configured to perform the method as claimed in any one of claims 1-8, and the chip is configured to provide, before a first cell in a target geographic area is handed over to a second cell, by using the transceiver component, auxiliary information, where 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 for use in a second network device, the chip being configured to perform the method according to any one of claims 9-16, the chip being configured to obtain assistance information before a first cell of a target geographical area is handed over to a second cell, the first cell being a cell corresponding to the first network device, the second cell being a cell corresponding to the second network device.

32. A chip module, characterized in that it is applied to a second network device, where the chip module includes a transceiver component and a chip, where the chip is configured to perform the method as claimed in any one of claims 9 to 16, and where the chip is configured to obtain, before a first cell of a target geographic area is handed over to a second cell, auxiliary information through the transceiver component, where 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 the chip is applied to a terminal, the chip is configured to perform the method according to any one of claims 17-21, the chip is configured to obtain auxiliary information before a first cell in a target geographic area is handed over to a second cell, 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 terminal is a terminal in a connected state or an INACTIVE state in the first cell.

34. A chip module, characterized in that the chip module is applied to a terminal, the chip module includes a transceiver component and a chip, the chip is configured to perform the method of any one of claims 17-21, the chip is configured to obtain auxiliary information through the transceiver component before a first cell in a target geographic 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.