Communication method, terminal, network device and storage medium

Abstract

The invention relates to a communication method, a terminal, network equipment and a storage medium. The communication method comprises: receiving first information sent by a network device, the first information being used for instructing a terminal to be redirected from a terrestrial network to a non-terrestrial network; according to the invention, the problem that a non-land network cannot be redirected due to different satellite orbit heights, different functions supported by different types of satellite cells and the like at present is solved.

Description

Communication method, terminal, network device and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, a terminal, a network device, and a storage medium. Background Art

[0002] Currently, the 3rd Generation Partnership Project (3GPP) has standardized the Internet of Things Network Technology Node (IoT NTN) and the New Radio Network Technology Node (NR NTN).

[0003] Summary of the Invention

[0004] Due to the different altitudes of satellite orbits and the differences in the functions supported by different types of satellite cells, it is currently not possible to support terminal redirection from non-terrestrial networks to non-terrestrial networks.

[0005] The embodiments of the present disclosure provide a communication method, a terminal, a network device, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, the method comprising: receiving first information sent by a network device, where the first information is used to instruct a terminal to redirect from a terrestrial network to a non-terrestrial network.

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, including: sending first information to a terminal, where the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0008] According to a third aspect of an embodiment of the present disclosure, a communication method is proposed, comprising: a network device sending first information to a terminal, wherein the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network; and the terminal receiving the first information.

[0009] According to a fourth aspect of an embodiment of the present disclosure, a terminal is proposed, including: a transceiver module, configured to receive first information sent by a network device, wherein the first information is configured to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0010] According to a fifth aspect of an embodiment of the present disclosure, a network device is proposed, including: a transceiver module, configured to send first information to a terminal, wherein the first information is configured to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0011] According to a sixth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the terminal is configured to execute the first aspect and any one of the communication methods in the first aspect.

[0012] According to a seventh aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors; wherein the network device is used to execute the second aspect and any one of the communication methods in the second aspect.

[0013] According to the eighth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the first aspect and any one of the communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the communication methods in the second aspect.

[0014] According to the ninth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes a communication method such as the first aspect and any one of the first aspects or the second aspect and any one of the second aspects.

[0015] The present disclosure receives first information from a network device to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network, that is, the terminal can be redirected to the non-terrestrial network upon receiving the first information, so as to solve the current situation where the terminal cannot be redirected to the non-terrestrial network due to different satellite orbit heights, differences in functions supported by different types of satellite cells, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0017] FIG1 is a schematic diagram showing a communication system architecture according to an embodiment of the present disclosure.

[0018] FIG2 is a schematic diagram showing an interaction of a communication method according to an embodiment of the present disclosure.

[0019] FIG3 a is a flow chart of a communication method according to an embodiment of the present disclosure.

[0020] FIG3 b is a flow chart of a communication method according to an embodiment of the present disclosure.

[0021] FIG4 is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0022] FIG5 is a schematic diagram showing an interaction of a communication method according to an embodiment of the present disclosure.

[0023] FIG6 a is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.

[0024] FIG6 b is a schematic structural diagram of a network device according to an embodiment of the present disclosure.

[0025] Fig. 7a is a schematic structural diagram of a communication device according to an exemplary embodiment.

[0026] FIG7 b is a schematic diagram showing a chip structure according to an exemplary embodiment. DETAILED DESCRIPTION

[0027] The embodiments of the present disclosure provide a communication method, a terminal, a network device, and a storage medium.

[0028] In a first aspect, an embodiment of the present disclosure proposes a communication method, the method comprising: receiving first information sent by a network device, where the first information is used to instruct a terminal to redirect from a terrestrial network to a non-terrestrial network.

[0029] In the above embodiment, the first information of the network device is received to instruct the terminal to redirect from the terrestrial network to the non-terrestrial network, that is, the terminal can be redirected to the non-terrestrial network when the first information is received, so as to solve the current situation where the terminal cannot be redirected to the non-terrestrial network due to different satellite orbit heights, differences in functions supported by different types of satellite cells, etc.

[0030] In some optional embodiments of the first aspect, the first information is carried in at least one of the following ways: redirected carrier information; system information SIB; radio resource control RRC message.

[0031] In the above embodiment, the first information can be carried by redirecting carrier information, system information, RRC message, etc., so as to save signaling consumption.

[0032] In some optional embodiments of the first aspect, the first information is further used to indicate relevant information of the non-terrestrial network.

[0033] In the above embodiment, the first information may also indicate information related to the non-terrestrial network, so that the terminal can be efficiently redirected to the non-terrestrial network.

[0034] In some optional embodiments of the first aspect, the relevant information of the non-terrestrial network includes at least one of the following: satellite ephemeris information; relevant information of the timing advance TA; valid time information of the satellite ephemeris information; frequency information; cell identification; satellite identification; antenna information; and time information when the non-terrestrial network neighboring cell starts service.

[0035] In the above embodiment, the relevant information of the non-terrestrial network may include at least one of the above items, so as to indicate that the terminal can be better redirected to the non-terrestrial network.

[0036] In some optional embodiments of the first aspect, the method further includes: acquiring satellite ephemeris information from system information; and redirecting to a non-terrestrial network according to the satellite ephemeris information.

[0037] In the above embodiment, when the terminal receives the first information for instructing the terminal to redirect from the terrestrial network to the non-terrestrial network, the terminal can obtain satellite ephemeris information from the system information and redirect to the non-terrestrial network based on the satellite ephemeris information. That is, there is no need for the first information to indicate other information, which can save resources, realize redirection to the non-terrestrial network, and improve communication efficiency.

[0038] In some optional embodiments of the first aspect, the method further includes at least one of the following: redirecting to a corresponding cell based on relevant information of the non-terrestrial network; redirecting to a corresponding satellite based on relevant information of the non-terrestrial network; redirecting to a corresponding frequency based on relevant information of the non-terrestrial network.

[0039] In the above embodiment, if the relevant information about the non-terrestrial network does not include satellite ephemeris information, the terminal can obtain the corresponding satellite ephemeris information from the system information based on the relevant information about the non-terrestrial network and redirect the call to the non-terrestrial network based on the satellite ephemeris information. This redirection to the non-terrestrial network improves communication efficiency.

[0040] In some optional embodiments of the first aspect, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message; a narrowband Internet of Things RRC early data request message; an RRC connection release message; or an RRC early data request message.

[0041] In the above embodiment, the first information can be carried by the at least one RRC message, thereby achieving efficient redirection to the non-terrestrial network and improving communication efficiency.

[0042] In some optional embodiments of the first aspect, the method further includes: in response to a failure in redirecting the satellite or cell, re-redirecting to another satellite different from the satellite or another cell different from the cell on the frequency information.

[0043] In the above embodiment, since the first information may indicate frequency information, if redirection fails, it may be redirected to other satellites or cells on the frequency to improve communication efficiency.

[0044] According to a second aspect, a communication method is provided, comprising: sending first information to a terminal, wherein the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0045] In some optional embodiments of the second aspect, the first information is carried in at least one of the following ways: redirected carrier information; system information SIB; radio resource control RRC message.

[0046] In some optional embodiments of the second aspect, the first information is further used to indicate relevant information of the non-terrestrial network.

[0047] In some optional embodiments of the second aspect, the relevant information of the non-terrestrial network includes at least one of the following: satellite ephemeris information; relevant information of the timing advance TA; valid time information of the satellite ephemeris information; frequency information; cell identification; satellite identification; antenna information; time information when the non-terrestrial network neighboring cell starts service.

[0048] In some optional embodiments of the second aspect, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message; a narrowband Internet of Things RRC early data request message; an RRC connection release message; or an RRC early data request message.

[0049] According to a third aspect, a communication method is provided, comprising: a network device sending first information to a terminal, wherein the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network; and the terminal receiving the first information.

[0050] In some optional embodiments of the third aspect, the first information is carried in at least one of the following ways: redirected carrier information, system information SIB, or radio resource control RRC message.

[0051] In some optional embodiments of the third aspect, the first information is further used to indicate relevant information of the non-terrestrial network.

[0052] In some optional embodiments of the third aspect, the non-terrestrial network related information includes at least one of the following: satellite ephemeris information, timing advance (TA) related information, validity period information of the satellite ephemeris information, frequency information, cell identifier, satellite identifier, antenna information, and service start time information of a non-terrestrial network neighboring cell.

[0053] In some optional embodiments of the third aspect, the terminal further includes a processing module configured to: obtain satellite ephemeris information from the system information, and redirect to the non-terrestrial network according to the satellite ephemeris information.

[0054] In some optional embodiments of the third aspect, the processing module is further used to perform at least one of the following: redirecting to a corresponding cell based on relevant information of the non-terrestrial network; redirecting to a corresponding satellite based on relevant information of the non-terrestrial network; redirecting to a corresponding frequency based on relevant information of the non-terrestrial network.

[0055] In some optional embodiments of the third aspect, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message, a narrowband Internet of Things RRC early data request message, an RRC connection release message, or an RRC early data request message.

[0056] In some optional embodiments of the third aspect, the processing module is further configured to: in response to a failure in redirecting the satellite or cell, redirect to another satellite different from the satellite or another cell different from the cell in frequency information.

[0057] In a fourth aspect, a terminal is provided, comprising: a transceiver module for receiving first information sent by a network device, wherein the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0058] In some optional embodiments of the fourth aspect, the first information is carried in at least one of the following ways: redirected carrier information, system information SIB, or radio resource control RRC message.

[0059] In some optional embodiments of the fourth aspect, the first information is further used to indicate relevant information of the non-terrestrial network.

[0060] In some optional embodiments of the fourth aspect, the non-terrestrial network related information includes at least one of the following: satellite ephemeris information, timing advance (TA) related information, validity period information of the satellite ephemeris information, frequency information, cell identifier, satellite identifier, antenna information, and service start time information of a non-terrestrial network neighboring cell.

[0061] In some optional embodiments of the fourth aspect, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message, a narrowband Internet of Things RRC early data request message, an RRC connection release message, or an RRC early data request message.

[0062] In a fifth aspect, a network device is provided, comprising: a transceiver module, configured to send first information to a terminal, wherein the first information is configured to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0063] In a sixth aspect, a terminal is provided, comprising: one or more processors; wherein the terminal is used to execute the first aspect and any one of the communication methods in the first aspect.

[0064] In a seventh aspect, a network device is provided, comprising: one or more processors; wherein the network device is used to execute the second aspect and any one of the communication methods in the second aspect.

[0065] In an eighth aspect, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to implement the first aspect and any one of the communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the communication methods in the second aspect.

[0066] In the ninth aspect, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes a communication method such as the first aspect and any one of the first aspect or the second aspect and any one of the second aspect.

[0067] In a tenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect or the second aspect.

[0068] In an eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first or second aspect.

[0069] In a twelfth aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first or second aspect.

[0070] It is understandable that the terminal, access network device, first network element, other network elements, core network device, communication system, storage medium, program product, computer program, chip, or chip system involved in each embodiment of the present disclosure are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0071] The present disclosure provides a communication method, a terminal, a network device, and a storage medium. In some embodiments, the terms "communication method," "information processing method," and "communication method" are interchangeable; the terms "communication device," "information processing device," and "communication device" are interchangeable; and the terms "information processing system," "communication system," and "communication system" are interchangeable.

[0072] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0073] In each embodiment of the present disclosure, unless otherwise specified or provided for, the terms and / or descriptions between the embodiments are consistent and may be referenced by each other. The technical environments in different embodiments may be combined to form new embodiments based on their inherent logical relationships.

[0074] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0075] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0076] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0077] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0078] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0079] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0080] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for example, if the description object is "information", then the "first information" and "the performance of each AI model" can be the same information or different information, and their contents can be the same or different.

[0081] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0082] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0083] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0084] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0085] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0086] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0087] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0088] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0089] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0090] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0091] Currently, for redirection, there is the following description:

[0092] Upon receiving a radio resource control connection release (RRCConnectionRelease) message or a radio resource control early data request (RRC EarlyDataComplete) message to move the UE to the radio resource control idle state (RRC_IDLE) or the radio resource control inactive state (RRC_INACTIVE), if the redirected carrier information (redirectedCarrierInfo) is included in the RRCConnection Release message or the RRC EarlyDataComplete message, the UE shall attempt to reside on a suitable cell according to the redirected redirectedCarrierInfo.

[0093] That is, when the UE enters the RRC idle state or the RRC inactive state, it needs to camp on a suitable cell according to the information of redirectedCarrierInfo.

[0094] For redirectedCarrierInfo, for example, it may include new air interface redirection carrier information (CarrierInfoNR), through which it can be determined which radio access technology (radio access technology, RAT) the UE is redirected to.

[0095] In addition, during redirection, the network device also provides messages such as a cell information list (cellInfoList) to provide system information of neighboring cells during redirection.

[0096] However, for NR NTN, there are currently satellites with different orbital altitudes, such as low earth orbit (LEO), medium earth orbit (MEO), geostationary earth orbit (GEO), etc. There are also different types of cells, such as quasi earth fixed cells and earth moving cells. Among them, quasi earth fixed cells refer to NTN solutions that are permanently or immediately fixed to a certain location on the earth. Earth moving cells refer to NTN solutions in which satellite cells move continuously on the earth. These different types of NR NTN cells support different functions, and the user experience provided to UEs is also different. Therefore, the current E-UTRAN TN redirection may not support redirection to NR NTN well.

[0097] Therefore, the present disclosure provides a communication method, which receives first information from a network device to instruct a terminal to redirect from a terrestrial network to a non-terrestrial network, that is, the terminal can be redirected to the non-terrestrial network upon receiving the first information, so as to solve the current situation where the terminal cannot be redirected to the non-terrestrial network due to different satellite orbit heights, differences in functions supported by different types of satellite cells, etc.

[0098] FIG1 is a schematic diagram showing a communication system architecture according to an embodiment of the present disclosure.

[0099] As shown in FIG1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0100] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, 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 wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0101] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0102] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0103] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0104] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0105] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0106] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0107] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0108] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0109] FIG2 is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0110] Step S2101 , the network device 102 sends first information to the terminal 101 .

[0111] In some embodiments, the terminal 101 receives first information sent by the network device 102 .

[0112] In some embodiments, the first information is used to instruct the terminal to redirect from the terrestrial network to the non-terrestrial network. That is, upon receiving the first information, the terminal may redirect to the non-terrestrial network.

[0113] In some embodiments, the first information may be carried by at least one of the following: redirected carrier information; system information; and radio resource control (RRC).

[0114] Optionally, the first information may be sent to the terminal in redirected carrier information, wherein the redirected carrier information is redirectedCarrierInfo. That is, when the redirected carrier information indicates a cell suitable for the terminal to reside in, it indicates that the terminal can be redirected to a non-terrestrial network.

[0115] Optionally, the first information may be sent to the terminal in a SIB. For example, the SIB may be SIB5. Of course, this disclosure is only an example, and the first information may also be carried by other SIBs, which is not limited in this disclosure.

[0116] Optionally, the first information may be sent to the terminal in an RRC message. For example, the RRC message may include system information of a non-terrestrial network neighboring cell, and the system information of the non-terrestrial network neighboring cell may be used as the first information to instruct the terminal to redirect from the non-terrestrial network to the terrestrial network. Alternatively, the system information of the non-terrestrial network neighboring cell may include the first information for instructing the terminal to redirect from the non-terrestrial network to the non-terrestrial network.

[0117] In some embodiments, the RRC message may include at least one of the following: a narrowband Internet of Things RRC connection release message (RRCConnectionRelease-NB); a narrowband Internet of Things RRC early data completion message (RRCEarlyDataComplete-NB); an RRC connection release message; or an RRC early data request message.

[0118] In some embodiments, the first information may also be used to indicate relevant information of the non-terrestrial network.

[0119] In some embodiments, the relevant information of the non-terrestrial network includes at least one of the following: satellite ephemeris information; relevant information of the timing advance TA; valid time information of the satellite ephemeris information; frequency information; cell identification; satellite identification; antenna information; time information of the non-terrestrial network neighboring cell starting service.

[0120] Optionally, the relevant information of the non-terrestrial network may include satellite ephemeris information. For example, the satellite ephemeris information may be used by the terminal to determine the position information of the satellite, so as to further determine the distance between the terminal and the satellite. In other words, the satellite ephemeris information may be used to redirect the terminal to a satellite or a cell on the satellite.

[0121] Optionally, the non-terrestrial network related information may include timing advance (TA) related information. For example, the TA related information may include a common TA parameter for the terminal to determine the TA.

[0122] Optionally, the non-terrestrial network-related information may include validity period information for the satellite ephemeris information. For example, the validity period information may include an epoch time or a validity period. For example, when the validity period of the satellite ephemeris information expires, the satellite ephemeris information becomes invalid and cannot be used to determine the terminal's location information. Specifically, the validity period information for the satellite ephemeris information can determine when the satellite ephemeris information expires, thereby facilitating better redirection to a satellite or a cell on a satellite.

[0123] Optionally, the relevant information of the non-terrestrial network may include frequency information. For example, the terminal may measure and redirect to a satellite or cell on the frequency according to the frequency information.

[0124] Optionally, the relevant information of the non-terrestrial network may include a cell identifier. For example, the terminal may be redirected to a corresponding cell according to the cell identifier.

[0125] Optionally, the relevant information of the non-terrestrial network may include a satellite identifier. For example, the terminal may be redirected to a corresponding satellite or a cell on a corresponding satellite according to the satellite identifier.

[0126] Optionally, the non-terrestrial network-related information may include antenna information. For example, the antenna information may include uplink antenna polarization information or downlink antenna polarization information. Antenna polarization information has a significant impact on signal transmission quality and distance. Specifically, the redirected satellite or cell can be more accurately determined based on antenna polarization information.

[0127] Optionally, the non-terrestrial network related information may include service start time information for a non-terrestrial network neighboring cell. For example, based on the service start time of the non-terrestrial network neighboring cell, the earliest neighboring cell to start service may be determined for redirection. In other words, the terminal may be better redirected based on the service start time information for the non-terrestrial network neighboring cell.

[0128] In some embodiments, the name of the first information is not limited, and it can be, for example, "instruction information", "configuration information", etc.

[0129] Step S2102: Terminal 101 is redirected to a non-terrestrial network based on the first information.

[0130] In some embodiments, when the first information indicates that the terminal is redirecting from a terrestrial network to a non-terrestrial network, the terminal may obtain satellite ephemeris information from the system information of the serving cell or the target cell. That is, when the terminal determines to redirect to a non-terrestrial network based on the first information, the terminal may directly obtain the satellite ephemeris information from the system information. Redirection to the non-terrestrial network may then be performed based on the satellite ephemeris information. For example, the terminal may determine the satellite or cell to redirect to based on the satellite ephemeris information.

[0131] In some embodiments, when the first information is used to indicate that the terminal is redirected from a non-terrestrial network to a non-terrestrial network, and the first information is also used to indicate relevant information about the non-terrestrial network, the terminal can be redirected to the non-terrestrial network based on the relevant information about the non-terrestrial network. For example, the satellite or cell on the frequency to which the terminal is redirected can be determined based on the frequency information in the relevant information about the non-terrestrial network. For another example, the satellite identifier in the relevant information about the non-terrestrial network can be used to determine that the terminal is redirected to the satellite corresponding to the satellite identifier or the cell on the corresponding satellite. For another example, the cell identifier in the relevant information about the non-terrestrial network can be used to determine that the terminal is redirected to the cell corresponding to the cell identifier.

[0132] In some embodiments, when the first information is used to instruct the terminal to redirect from a non-terrestrial network to a non-terrestrial network, and the first information is also used to indicate relevant information of the non-terrestrial network, if the relevant information of the non-terrestrial network does not include satellite ephemeris information, the terminal can obtain the corresponding satellite ephemeris information from the system information based on the relevant information of the non-terrestrial network. For example, if the relevant information of the non-terrestrial network does not include satellite ephemeris information but includes frequency information, the terminal can obtain the satellite ephemeris information corresponding to the frequency information from the system information. For another example, if the relevant information of the non-terrestrial network does not include satellite ephemeris information but includes a satellite identifier, the terminal can obtain the satellite ephemeris information corresponding to the satellite identifier from the system information. For another example, if the relevant information of the non-terrestrial network does not include satellite ephemeris information but includes a cell identifier, the terminal can obtain the satellite ephemeris information corresponding to the cell identifier from the system information.

[0133] Step S2103 : In response to a failure in redirection to a satellite or cell, the terminal 101 redirects to another satellite or another cell on the frequency information of the non-terrestrial network.

[0134] In some embodiments, if the terminal fails to be redirected to a certain satellite or a certain cell according to the frequency information in the relevant information of the non-terrestrial network, it may be redirected to other satellites or other cells on the frequency information.

[0135] In some embodiments, if the terminal fails to be redirected to the satellite according to the satellite identifier of the non-terrestrial network, it may be redirected to other satellites or other cells on the frequency information according to the frequency information in the relevant information of the non-terrestrial network.

[0136] In some embodiments, if the terminal fails to be redirected to the cell according to the cell identifier of the non-terrestrial network, it may be redirected to other satellites or other cells on the frequency information according to the frequency information in the relevant information of the non-terrestrial network.

[0137] The communication method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, but is not limited thereto.

[0138] In some embodiments, step S2102 and step S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0139] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0140] FIG3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3a, the embodiment of the present disclosure relates to a communication method, which is executed by terminal 101 and includes:

[0141] Step S3101, obtain first information.

[0142] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0143] In some embodiments, the terminal 101 receives the first information sent by the network device 102, but is not limited thereto and may also receive the first information sent by other entities.

[0144] In some embodiments, terminal 101 obtains first information specified by a protocol.

[0145] In some embodiments, terminal 101 obtains the first information from upper layer(s).

[0146] In some embodiments, the terminal 101 performs processing to obtain the first information.

[0147] In some embodiments, step S3101 is omitted, and the terminal 101 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0148] Step S3102: redirect to a non-terrestrial network based on the first information.

[0149] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0150] Step S3103: In response to a failure in redirection to a satellite or cell, redirection to another satellite or other cell on the frequency information of the non-terrestrial network.

[0151] The optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0152] FIG3b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3b, the present disclosure embodiment relates to a communication method, which is executed by terminal 101 and includes:

[0153] Step S3201, obtain first information.

[0154] The optional implementation of step S3201 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0155] In some embodiments, the terminal 101 receives the first information sent by the network device 102, but is not limited thereto and may also receive the first information sent by other entities.

[0156] In some embodiments, terminal 101 obtains first information specified by a protocol.

[0157] In some embodiments, terminal 101 obtains the first information from upper layer(s).

[0158] In some embodiments, the terminal 101 performs processing to obtain the first information.

[0159] In some embodiments, step S3201 is omitted, and the terminal 101 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0160] In some embodiments, the first information is carried in at least one of the following ways: redirected carrier information, system information SIB, or radio resource control RRC message.

[0161] In some embodiments, the first information is further used to indicate relevant information of the non-terrestrial network.

[0162] In some embodiments, the non-terrestrial network related information includes at least one of the following: satellite ephemeris information, timing advance (TA) related information, validity period information of the satellite ephemeris information, frequency information, cell identifier, satellite identifier, antenna information, and service start time information of a non-terrestrial network neighboring cell.

[0163] In some embodiments, the method further includes: acquiring satellite ephemeris information from system information, and redirecting to the non-terrestrial network according to the satellite ephemeris information.

[0164] In some embodiments, the information related to the non-terrestrial network does not include satellite ephemeris information, and the method further includes: obtaining satellite ephemeris information corresponding to the information related to the non-terrestrial network from the system based on the information related to the non-terrestrial network, and redirecting to the non-terrestrial network based on the satellite ephemeris information.

[0165] In some embodiments, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message, a narrowband Internet of Things RRC early data request message, an RRC connection release message, or an RRC early data request message.

[0166] In some embodiments, the method further includes: in response to a failure in redirecting the satellite or cell, re-redirecting to another satellite different from the satellite or another cell different from the cell on the frequency information.

[0167] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 , the present disclosure embodiment relates to a communication method, which is executed by a network device 102 and includes:

[0168] Step S4101, sending the first information.

[0169] The optional implementation of step S4101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0170] In some embodiments, the network device 102 sends the first information to the terminal 101, but is not limited thereto and may also send the first information to other entities.

[0171] FIG5 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0172] Step S5101: The network device 102 sends first information to the terminal 101.

[0173] The optional implementation of step S5101 can be found in S2102 of FIG. 2 and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0174] In some embodiments, the above method may include the method of the above embodiments related to the communication system 100, the terminal 101, the network device 102, etc., which will not be repeated here.

[0175] Step S5102: Terminal 101 receives first information.

[0176] The optional implementation of step S5102 can be found in S2103 of FIG. 2 and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0177] In some embodiments, the above method may include the method of the above embodiments related to the communication system 100, the terminal 101, the network device 102, etc., which will not be repeated here.

[0178] The present disclosure provides a method for redirecting an E-UTRAN TN UE to an NR NTN, as follows:

[0179] In some embodiments, the method of redirecting an E-UTRAN TN UE to an NR NTN may also be referred to as a communication method.

[0180] In some embodiments, the network, such as a base station, sends indication information to the UE, where the indication information is used to redirect the UE from the E-UTRAN TN UE to the NR NTN.

[0181] In some embodiments, the indication information may be first information. The network may be a network device.

[0182] In some embodiments, the indication information is included in the redirected carrier information.

[0183] In some embodiments, the indication information is NR NTN information, including one of the following:

[0184] Satellite ephemeris information;

[0185] TA-related information;

[0186] Valid time information of satellite ephemeris information, such as epoch time and validity duration;

[0187] Frequency information;

[0188] Cell identifier (ID);

[0189] Satellite ID;

[0190] Antenna information, such as uplink antenna and / or downlink antenna polarization information;

[0191] Time information when the neighboring cell starts service.

[0192] In some embodiments, when the indication information only includes frequency information or satellite ID or frequency information + satellite ID, the UE obtains the ephemeris information of the satellite corresponding to the frequency information from the system information, or obtains the frequency information corresponding to the satellite ID from the system information.

[0193] In some embodiments, the indication information may also include system information of the cell that redirects the NR NTN frequency / carrier;

[0194] In some embodiments, the system information of the NR NTN cell of the NR NTN frequency / carrier is in the cell information list;

[0195] In some embodiments, the indication information is sent via one of the following:

[0196] RRC message:

[0197] RRCConnectionRelease-NB

[0198] RRCEarlyDataComplete-NB

[0199] RRCConnectionRelease

[0200] RRCEarlyDataComplete

[0201] System Information: SIB5

[0202] In some embodiments, according to the indication information, the UE should camp on the cell corresponding to the indicated satellite;

[0203] In some embodiments, according to the indication information, if the UE cannot camp on the cell corresponding to the indicated satellite, the UE may try to camp on other cells corresponding to the frequency points in the indication information.

[0204] FIG6a is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in FIG6a , the terminal 6100 may include a transceiver module 6101. The transceiver module 6101 is configured to receive first information sent by a network device, the first information being used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0205] In some embodiments, the first information is carried in at least one of the following ways: redirected carrier information, system information SIB, or radio resource control RRC message.

[0206] In some embodiments, the first information is further used to indicate relevant information of the non-terrestrial network.

[0207] In some embodiments, the non-terrestrial network related information includes at least one of the following: satellite ephemeris information, timing advance (TA) related information, validity period information of the satellite ephemeris information, frequency information, cell identifier, satellite identifier, antenna information, and service start time information of a non-terrestrial network neighboring cell.

[0208] In some embodiments, the terminal 6100 further includes a processing module 6102 configured to: obtain satellite ephemeris information from the system information, and redirect to a non-terrestrial network according to the satellite ephemeris information.

[0209] In some embodiments, the processing module 6102 is further used to perform at least one of the following: redirecting to a corresponding cell based on relevant information of the non-terrestrial network; redirecting to a corresponding satellite based on relevant information of the non-terrestrial network; redirecting to a corresponding frequency based on relevant information of the non-terrestrial network.

[0210] In some embodiments, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message, a narrowband Internet of Things RRC early data request message, an RRC connection release message, or an RRC early data request message.

[0211] In some embodiments, the processing module 6102 is further configured to: in response to a failure in redirecting the satellite or cell, redirect to another satellite different from the satellite or another cell different from the cell in frequency information.

[0212] Figure 6b is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in Figure 6b, the network device 6200 may include a transceiver module 6201. The transceiver module 6201 is configured to send first information to a terminal, the first information being used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

[0213] In some embodiments, the first information is carried in at least one of the following ways: redirected carrier information, system information SIB, or radio resource control RRC message.

[0214] In some embodiments, the first information is further used to indicate relevant information of the non-terrestrial network.

[0215] In some embodiments, the non-terrestrial network related information includes at least one of the following: satellite ephemeris information, timing advance (TA) related information, validity period information of the satellite ephemeris information, frequency information, cell identifier, satellite identifier, antenna information, and service start time information of a non-terrestrial network neighboring cell.

[0216] In some embodiments, the RRC message includes any one of the following: a narrowband Internet of Things RRC connection release message, a narrowband Internet of Things RRC early data request message, an RRC connection release message, or an RRC early data request message.

[0217] In some embodiments, the network device 6200 may further include a processing module 6202 for executing corresponding steps.

[0218] Figure 7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device, a terminal, a chip, a chip system, or a processor that supports a network device in implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal in implementing any of the above methods. Optionally, the network device can be an access network device, a core network device, or the like. Optionally, the terminal can be a user equipment, or the like. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0219] As shown in Figure 7a, communication device 7100 includes one or more processors 7101. Processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device, execute programs, and process program data. Communication device 7100 is used to perform any of the above methods. Optionally, the communication device can be a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.

[0220] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0221] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs the communication step S2101 such as sending and / or receiving in the above method, and the processor 7101 performs other steps.

[0222] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0223] In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102. The interface circuit 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0224] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0225] FIG7 b is a schematic diagram of the structure of a chip 7200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0226] The chip 7200 includes one or more processors 7201 , and the chip 7200 is configured to execute any of the above methods.

[0227] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0228] In some embodiments, the interface circuit 7202 executes the communication step S2101 of sending and / or receiving in the above method, and the processor 7201 executes other steps.

[0229] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0230] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Alternatively, all or part of the memories 7203 may be located outside the chip 7200.

[0231] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0232] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0233] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A communication method, characterized in that: The method is executed by a terminal, and includes: First information sent by a network device is received, where the first information is used to instruct a terminal to redirect from a terrestrial network to a non-terrestrial network.

2. The method according to claim 1, characterized in that The first information is carried in at least one of the following ways: Redirect carrier information; System information; Radio Resource Control RRC message.

3. The method according to claim 1, characterized in that The first information is further used to indicate relevant information of the non-terrestrial network.

4. The method according to claim 3, characterized in that The non-terrestrial network related information includes at least one of the following: Satellite ephemeris information; Related information about the timing advance TA; Valid time information of satellite ephemeris information; Frequency information; cell identification; Satellite identification; Antenna information; Time information when the non-terrestrial network neighboring cell starts service.

5. The method according to claim 1, wherein The method further comprises: Get satellite ephemeris information from system information; Redirecting to a non-terrestrial network according to the satellite ephemeris information.

6. The method according to claim 4, characterized in that The method further comprises at least one of the following: Redirecting to a corresponding cell based on the relevant information of the non-terrestrial network; Redirecting to a corresponding satellite based on the relevant information of the non-terrestrial network; Redirect to a corresponding frequency based on the relevant information of the non-terrestrial network.

7. The method according to claim 2, characterized in that The RRC message includes any one of the following: NB-IoT RRC connection release message; Narrowband IoT RRC early data request message; RRC connection release message; RRC Early Data Request message.

8. The method according to claim 6, characterized in that The method further comprises: In response to a failure in redirection to a satellite or cell, redirection is performed to another satellite or another cell on the frequency information of the non-terrestrial network.

9. A communication method, characterized in that: The method is performed by a network device, and includes: First information is sent to a terminal, where the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

10. The method according to claim 9, characterized in that The first information is carried in at least one of the following ways: Redirect carrier information; System Information SIB; Radio Resource Control RRC message.

11. The method according to claim 9, characterized in that The first information is further used to indicate relevant information of the non-terrestrial network.

12. The method according to claim 11, characterized in that The non-terrestrial network related information includes at least one of the following: Satellite ephemeris information; Related information about the timing advance TA; Valid time information of satellite ephemeris information; Frequency information; cell identification; Satellite identification; Antenna information; Time information when the non-terrestrial network neighboring cell starts service.

13. The method according to claim 10, characterized in that The RRC message includes any one of the following: NB-IoT RRC connection release message; Narrowband IoT RRC early data request message; RRC connection release message; RRC Early Data Request message.

14. A communication method, characterized in that: The method comprises: The network device sends first information to the terminal, where the first information is used to instruct the terminal to redirect from the terrestrial network to the non-terrestrial network; The terminal receives the first information.

15. A terminal, characterized in that: include: The transceiver module is configured to receive first information sent by a network device, where the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

16. A network device, characterized in that: include: The transceiver module is configured to send first information to a terminal, where the first information is used to instruct the terminal to redirect from a terrestrial network to a non-terrestrial network.

17. A terminal, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 1 to 8.

18. A network device, characterized in that: include: one or more processors; The processor is configured to execute the communication method according to any one of claims 9 to 13.

19. A communication system, characterized in that: include: A terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1 to 8, and the network device is configured to implement the communication method according to any one of claims 9 to 13.

20. A storage medium, characterized in that include: The storage medium stores instructions, and when the instructions are executed on the communication device, the communication device executes the communication method according to any one of claims 1 to 8 or 9 to 13.

21. A program product, characterized in that include: A computer program, which, when executed by a communication device, causes the communication device to execute the communication method according to any one of claims 1 to 8 or 9 to 13.

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