Information processing method, and communication device, communication system and storage medium

Abstract

Provided in the embodiments of the present disclosure are an information processing method, and a communication device, a communication system and a storage medium. The method comprises: determining second information on the basis of first information, wherein the first information is used for determining the validity duration of position information of a terminal, and the second information is used for maintaining synchronization between the terminal and a network device in a non-terrestrial network (NTN) when the position information of the terminal exceeds the validity duration. The technical solution provided in the embodiments of the present disclosure is conducive to maintaining uplink synchronization between a terminal and a network device in an NTN when position information of the terminal exceeds the validity duration, thereby avoiding interference with uplink transmission between different terminals.

Description

Information processing method, communication device, communication system and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to an information processing method, communication equipment, a communication system, and a storage medium. Background Art

[0002] In order to enable the terminal to perform uplink synchronization, the network device may indicate a timing advance (TA) value to the terminal, and the terminal obtains uplink synchronization according to the TA value indicated by the network device.

[0003] In non-terrestrial networks (NTNs), the relative motion of NTN equipment and terminals causes transmission delays between them, and this delay can vary rapidly. To maintain uplink synchronization, terminals need to accurately know their location information to compensate for uplink synchronization. However, when transmitting services with long transmission times, if the terminal's location information expires, the terminal device will enter an idle state and reacquire its location information, increasing transmission delay and power consumption.

[0004] Summary of the Invention

[0005] With the development of communication technology, when the validity period of the terminal's location information expires, the uplink synchronization between the terminal and the NTN network equipment is maintained to effectively reduce the transmission delay.

[0006] Embodiments of the present disclosure provide an information processing method, a communication device, and a storage medium.

[0007] According to a first aspect of an embodiment of the present disclosure, there is provided an information method, wherein the method includes:

[0008] Based on the first information, second information is determined, wherein the first information is used to determine the validity period of the terminal's location information; the second information is used to maintain synchronization between the terminal and a network device of a non-terrestrial network NTN when the validity period of the terminal's location information expires.

[0009] According to a second aspect of an embodiment of the present disclosure, there is provided an information processing method, wherein the method includes:

[0010] The NTN network device sends third information to the terminal; wherein the third information is used by the terminal to determine the second information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

[0011] According to a third aspect of an embodiment of the present disclosure, there is provided an information processing method, wherein the method includes:

[0012] The NTN network device sends third information to the terminal; the third information is used by the terminal to determine the second information;

[0013] Based on the first information and the third information, the terminal determines the second information; the first information is used to determine the validity period of the terminal's location information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

[0014] According to a fourth aspect of an embodiment of the present disclosure, a terminal is provided, wherein the terminal includes:

[0015] A determination module is used to determine second information based on first information, wherein the first information is used to determine the validity period of the terminal's location information; and the second information is used to maintain synchronization between the terminal and a network device of a non-terrestrial network NTN when the validity period of the terminal's location information expires.

[0016] According to a fifth aspect of an embodiment of the present disclosure, a network device is provided, wherein the network device includes:

[0017] A sending module is used to send third information to the terminal; wherein the third information is used by the terminal to determine the second information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

[0018] According to the sixth aspect of an embodiment of the present disclosure, a communication system is provided, wherein the communication system includes a terminal and a network device, the terminal is configured to implement the information processing method provided by the first aspect, and the network device is configured to implement the information processing method provided by the second aspect.

[0019] According to a seventh aspect of an embodiment of the present disclosure, a communication device is provided, wherein the communication device includes:

[0020] one or more processors;

[0021] The processor is used to call instructions to enable the communication device to execute the information processing method provided by the first aspect or the second aspect.

[0022] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the information processing method provided by the first aspect or the second aspect.

[0023] The technical solution provided by the embodiments of the present disclosure is conducive to maintaining uplink synchronization between the terminal and the NTN network device when the validity period of the terminal location information expires, thereby avoiding interference in uplink transmission between different terminals.

[0024] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the embodiments of the present invention.

[0026] FIG1a is a schematic diagram showing an architecture of a communication system according to an exemplary embodiment;

[0027] FIG1b is a schematic diagram showing a scenario of uplink and downlink timing alignment at a base station side according to an exemplary embodiment;

[0028] FIG1c is a schematic diagram showing a scenario in which uplink and downlink timings on a base station side are not aligned according to an exemplary embodiment;

[0029] FIG2a is an interactive schematic diagram showing an information processing method according to an exemplary embodiment;

[0030] FIG2 b is an interactive schematic diagram showing an information processing method according to an exemplary embodiment;

[0031] FIG3a is a schematic flow chart showing an information processing method according to an exemplary embodiment;

[0032] FIG3 b is a schematic flow chart showing an information processing method according to an exemplary embodiment;

[0033] FIG3 c is a schematic flow chart showing an information processing method according to an exemplary embodiment;

[0034] FIG4a is a schematic flow chart showing an information processing method according to an exemplary embodiment;

[0035] FIG4 b is a schematic flow chart showing an information processing method according to an exemplary embodiment;

[0036] FIG5 is an interactive schematic diagram showing an information processing method according to an exemplary embodiment;

[0037] FIG6 a is a schematic diagram showing a method of adjusting a TA value of uplink transmission of a terminal based on a TA drift rate according to an exemplary embodiment;

[0038] FIG6 b is a schematic diagram showing a method of adjusting a TA value of uplink transmission of a terminal based on a TA adjustment amount indicated by a TAC according to an exemplary embodiment;

[0039] FIG7a is a schematic structural diagram of a terminal according to an exemplary embodiment;

[0040] FIG7b is a schematic structural diagram of a network device according to an exemplary embodiment;

[0041] FIG8a is a schematic structural diagram of a communication device 8100 according to an exemplary embodiment;

[0042] FIG8 b is a schematic structural diagram of a chip 8200 according to an exemplary embodiment. DETAILED DESCRIPTION

[0043] Embodiments of the present disclosure provide an information processing method and apparatus, a communication device, a communication system, and a storage medium.

[0044] In a first aspect, an embodiment of the present disclosure provides an information processing method, wherein the method includes:

[0045] Based on the first information, second information is determined, wherein the first information is used to determine the validity period of the terminal's location information; the second information is used to maintain synchronization between the terminal and a network device of a non-terrestrial network NTN when the validity period of the terminal's location information expires.

[0046] In the above embodiment, if the validity period of the terminal's location information expires, the terminal determines and utilizes the second information to maintain uplink synchronization between the terminal and the NTN network device. Thus, while synchronization between the terminal and the NTN network device is maintained, uplink and / or downlink transmission between the terminal and the NTN network device can continue, thereby improving the terminal's reachability and the terminal's communication quality on the NTN.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0048] Receive third information from a network device; wherein the third information is used by the terminal to determine the second information.

[0049] In the above embodiment, the terminal can determine the second information based on the third information sent by the network device, and then use the second information to maintain the uplink synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires, thereby realizing closed-loop synchronization adjustment, thereby avoiding interference in uplink transmission between different terminals.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the third information includes at least one of the following:

[0051] Timing Advance TA drift rate;

[0052] Adjust the amount in advance regularly.

[0053] In the above embodiment, the terminal adjusts the timing advance TA value of the terminal's uplink transmission according to the timing advance TA drift rate and / or the timing advance adjustment amount indicated by the third information, thereby reducing the transmission delay between the terminal and the network device, thereby maintaining the uplink synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires, thereby avoiding interference in uplink transmissions between different terminals.

[0054] In combination with some embodiments of the first aspect, in some embodiments, the third information is carried in a timing advance command TAC.

[0055] In the above embodiment, the existing timing advance command TAC may be directly reused to carry the third information, thereby effectively reducing signaling overhead.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0057] receiving fourth information, wherein the fourth information indicates one or more candidate TA drift rates configured for the terminal;

[0058] The TAC is used to determine the TA drift rate included in the second information from one or more candidate TA drift rates.

[0059] In the above embodiment, the terminal receives the fourth information, determines one or more alternative TA drift rates pre-configured by the network device based on the fourth information, and determines the TA drift rate contained in the second information from one or more alternative TA drift rates based on the TAC sent by the network device, thereby reducing the message length of the TAC and reducing communication overhead.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, determining the second information based on the first information includes:

[0061] determining fifth information, wherein the fifth information is used to determine a second location of the terminal;

[0062] The TA drift rate included in the second information is determined according to the first position and the second position determined by the first information.

[0063] In the above embodiment, when the validity period of the terminal's location information expires, the terminal can determine its current second location by itself, and estimate the transmission delay between the terminal and the network device based on the first location and the second location determined by the first information to determine the TA drift rate; when the validity period of the terminal's location information expires, the uplink synchronization between the terminal and the NTN network device is maintained to achieve open-loop synchronization adjustment and avoid interference in uplink transmissions between different terminals.

[0064] In conjunction with some embodiments of the first aspect, in some embodiments, determining the fifth information includes:

[0065] Acquire sixth information; wherein the sixth information is used to determine the mobility status of the NTN network device;

[0066] The fifth information is determined based on the sixth information.

[0067] In the above embodiment, when the validity period of the terminal's location information expires, the terminal can determine the current location of the NTN network device by obtaining the sixth information used to determine the mobility status of the NTN network device, so as to estimate the second location of the terminal and determine the TA drift rate based on the second location.

[0068] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0069] The second information is a TA drift rate, and a TA adjustment amount in a time unit is determined according to the TA drift rate;

[0070] Based on the TA adjustment amount, the TA value of the corresponding time unit is adjusted.

[0071] In the above embodiment, after determining the second information, if the second information is the TA drift rate, the TA adjustment amount on a time unit of the uplink transmission can be determined based on the TA drift rate, and the TA value corresponding to the corresponding time unit can be adjusted based on the TA adjustment amount, so that when the validity period of the terminal's location information expires, a more accurate TA value for the uplink transmission is obtained, effectively reducing the transmission delay and maintaining uplink synchronization between the terminal and the NTN network device.

[0072] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0073] Based on the second information being a TA adjustment amount, adjusting the TA value of the corresponding time unit according to the TA adjustment amount

[0074] In the above embodiment, after determining the second information, if the second information is a TA adjustment amount, the TA value corresponding to the corresponding time unit can be adjusted based on the TA adjustment amount, so that when the validity period of the terminal's location information expires, a more accurate TA value for uplink transmission can be obtained, effectively reducing the transmission delay and maintaining uplink synchronization between the terminal and the NTN network device.

[0075] In a second aspect, an embodiment of the present disclosure provides an information processing method, wherein the method includes:

[0076] The NTN network device sends third information to the terminal; wherein the third information is used by the terminal to determine the second information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

[0077] In the above embodiment, the network device may send the third information to the terminal so that the terminal can determine the second information based on the third information, and then use the second information to maintain uplink synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires, thereby realizing closed-loop synchronization adjustment, thereby avoiding interference in uplink transmissions between different terminals.

[0078] In a third aspect, an embodiment of the present disclosure provides an information processing method, wherein the method includes:

[0079] The NTN network device sends third information to the terminal; the third information is used by the terminal to determine the second information;

[0080] Based on the first information and the third information, the terminal determines the second information; the first information is used to determine the validity period of the terminal's location information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

[0081] In a fourth aspect, an embodiment of the present disclosure provides a terminal, wherein the terminal includes:

[0082] A determination module is used to determine second information based on first information, wherein the first information is used to determine the validity period of the terminal's location information; and the second information is used to maintain synchronization between the terminal and a network device of a non-terrestrial network NTN when the validity period of the terminal's location information expires.

[0083] In a fifth aspect, an embodiment of the present disclosure provides a network device, wherein the network device includes:

[0084] A sending module is used to send third information to the terminal; wherein the third information is used by the terminal to determine the second information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

[0085] In a sixth aspect, an embodiment of the present disclosure provides a communication system, wherein the communication system includes a terminal and a network device, the terminal is configured to implement the information processing method provided in the first aspect, and the network device is configured to implement the information processing method provided in the second aspect.

[0086] In a seventh aspect, an embodiment of the present disclosure provides a communication device, wherein the communication device includes:

[0087] one or more processors;

[0088] The processor is used to call instructions to enable the communication device to execute the information processing method provided by the first aspect or the second aspect.

[0089] In an eighth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the information processing method provided in the first aspect or the second aspect.

[0090] In a ninth aspect, an embodiment of the present disclosure provides a program product, which, when executed by a communication device, enables the communication device to execute the information processing method described in the optional implementation manner of the first aspect or the second aspect.

[0091] In a tenth aspect, an embodiment of the present disclosure provides a computer program, which, when executed on a computer, enables the computer to execute the information processing method described in the optional implementation of the first aspect or the second aspect.

[0092] It is understandable that the above-mentioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods provided by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0093] The present disclosure provides an information processing method, communication device, communication system, and storage medium. In some embodiments, the terms "information processing method," "information indication method," and "information transmission method" are interchangeable; the terms "information indication device," "information processing device," and "information transmission device" are interchangeable; and the terms "communication system," "information processing system," and "information processing system" are interchangeable.

[0094] 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.

[0095] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0096] 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.

[0097] 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.

[0098] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0099] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0100] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "in one case A, in another case B," or "in one case A, in 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 same applies when there are more branches such as A, B, and C.

[0101] 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.

[0102] 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 another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0103] 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.

[0104] In some embodiments, terms such as "...", "determine...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0105] 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.

[0106] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0107] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0108] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / 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)" and the like may be used interchangeably.

[0109] In some embodiments, the terms "terminal", "terminal device", "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. can be used interchangeably.

[0110] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0111] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0112] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0113] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0114] 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.

[0115] Fig. 1a is a schematic diagram showing the architecture of a communication system according to an exemplary embodiment.

[0116] As shown in FIG. 1 a , a communication system 100 includes a terminal 101 and a network device 102 .

[0117] 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.

[0118] In some embodiments, the network device 102 may include an access network device and / or a core network device.

[0119] In some embodiments, the access network device may be, 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.

[0120] 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.

[0121] 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.

[0122] In some embodiments, a core network device may be a single device including one or more network elements, or may be multiple devices or a group of devices, each including one or more network elements. A 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), or a Next Generation Core (NGC).

[0123] 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 provided by 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 provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0124] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1a, or a portion thereof, but are not limited thereto. The entities shown in FIG1a are illustrative only. The communication system may include all or a portion of the entities shown in FIG1a, or may include other entities other than those shown in FIG1a. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0125] 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).

[0126] In some embodiments, the continuous emergence of new internet applications such as augmented reality (AR) / virtual reality (VR) and vehicle-to-vehicle communication has placed higher demands on wireless communication technology, driving the continuous evolution of wireless communication technology to meet these application needs. Currently, cellular mobile communication technology is in the process of evolving into a new generation of technology. A key feature of this new generation of technology is the flexible configuration that supports multiple service types. Different service types have different requirements for wireless communication technology. For example, the enhanced mobile broadband (eMBB) service type primarily requires high bandwidth and high speed; the ultra-reliable low latency communication (URLLC) service type primarily requires high reliability and low latency; and the massive machine type communication (mMTC) service type primarily requires a large number of connections. Therefore, the next generation of wireless communication systems requires flexible and configurable designs to support the transmission of multiple service types.

[0127] In the study of wireless communication technology, satellite communication is considered an important aspect of future wireless communication technology development. Satellite communication refers to communication conducted by ground-based radio communication equipment using satellites as relays. Satellite communication systems consist of satellite and ground components. Satellite communication features include: a wide communication range; communication between any two points within the coverage area of ​​the satellite's radio waves; and low susceptibility to land-based disasters (high reliability). As a supplement to current ground-based cellular communication systems, satellite communication can provide the following benefits:

[0128] Extended coverage: For areas that are not covered by current cellular communication systems or are costly to cover, such as oceans, deserts, and remote mountainous areas, satellite communications can be used to solve communication problems.

[0129] Emergency communications: In extreme situations such as disasters such as earthquakes, when cellular communication infrastructure is unavailable, satellite communications can be used to quickly establish communication connections.

[0130] Provide industry applications: For example, for delay-sensitive services in long-distance transmission, satellite communications can be used to reduce the delay of service transmission.

[0131] It can be foreseen that in future wireless communication systems, satellite communication systems and terrestrial cellular communication systems will gradually achieve deep integration, truly realizing the intelligent connection of all things.

[0132] In some embodiments, in satellite communications, data transmission takes a long time due to the long signal transmission distance between the transmitter and receiver. For transmissions involving both uplink and downlink, current standardization discussions have identified the introduction of the Koffset parameter to compensate for transmission delay.

[0133] As shown in Figure 1b and Figure 1c, Figure 1b is a schematic diagram of a scenario in which uplink and downlink timing are aligned on the base station side according to an exemplary embodiment; Figure 1c is a schematic diagram of a scenario in which uplink and downlink timing are not aligned on the base station side according to an exemplary embodiment.

[0134] The K offset It can be applied in various operations, such as: Physical Uplink Sharing Channel (PUSCH) transmission scheduled by Downlink Control Information (DCI); Hybrid Automatic Repeat Request (HARQ) feedback information transmission; and Media Access Control (MAC) Control Element (CE) transmission.

[0135] In some embodiments, the terminal needs to obtain location information to determine timing compensation for uplink transmission. The terminal can determine its own location information through a Global Navigation Satellite System (GNSS) measurement module.

[0136] After the terminal obtains the GNSS measurement results, the GNSS reliability time can be reported to the base station through the GNSS validity duration. In some embodiments, when the GNSS validity duration of the terminal expires, the terminal enters an idle state.

[0137] The terminal's entering the idle state to reacquire GNSS will cause data transmission delays. How to prevent the terminal from entering the idle state after the GNSS validity duration expires? One possible method is to prevent the terminal from entering the idle state when uplink synchronization can be maintained. After the original GNSS availability time expires, the terminal can still perform uplink transmission if certain conditions are met. However, how to perform uplink synchronization during this period needs to be clarified.

[0138] FIG2a is an interactive diagram illustrating an information processing method according to an exemplary embodiment. As shown in FIG2a , the embodiment of the present disclosure relates to an information processing method for a communication system 100, the method comprising:

[0139] Step S2101: The network device determines the third information.

[0140] In some embodiments, the network device may be a network device of a non-terrestrial network (NTN), such as a satellite or a drone.

[0141] It's important to note that NTN refers to non-terrestrial networks, including satellite communications. Satellite communications refers to communications conducted by terrestrial radio communication equipment using satellites as relay nodes. Satellite communication systems consist of satellite and terrestrial components.

[0142] In some embodiments, the third information is used by the terminal to determine the second information.

[0143] It should be noted that the terminal may be a terminal supporting the NTN network.

[0144] In some embodiments, the third information may be uplink synchronization assistance information.

[0145] In some embodiments, the third information is used to assist the terminal in determining a timing advance TA value for uplink transmission.

[0146] In some embodiments, the third information may include at least one of the following:

[0147] Timing Advance TA drift rate;

[0148] Timed advance TA adjustment amount.

[0149] In some embodiments, the timing advance TA drift rate is used to indicate the amount of change in TA per unit time.

[0150] It should be noted that due to the movement of NTN network equipment and / or terminals, the transmission delay between the terminal and NTN network equipment changes rapidly. Before uplink transmission, the terminal needs to determine the timing compensation of the terminal uplink transmission based on the timing advance TA drift rate and / or the timing advance TA adjustment amount to reduce the transmission delay between the terminal and NTN network equipment and maintain uplink synchronization.

[0151] In some embodiments, the second information is used to maintain synchronization between the terminal and the network device of the NTN when the validity period of the location information of the terminal expires.

[0152] In some embodiments, the second information is used for the terminal to perform uplink transmission when the validity period of the terminal's location information expires.

[0153] In some embodiments, the second information is used to compensate for a transmission delay of an uplink transmission of the terminal when the validity period of the terminal's location information expires.

[0154] In some embodiments, the second information is used to determine an adjusted TA value.

[0155] It should be noted that in the uplink transmission, the terminal needs to send the uplink signal a certain amount of time in advance relative to the downlink transmission in a certain time unit (for example, the time unit may include but is not limited to a subframe, a time slot, a radio frame and / or an OFDM symbol, etc.) or a certain absolute time unit, that is, the timing advance TA, so that the signal arrival time of all terminals in the cell on the network side is consistent, and the transmission delay between the network equipment and the terminal is compensated, so that the uplink transmission unit and the downlink transmission unit on the network side are aligned in time.

[0156] It is worth noting that in an NTN network, the position between the terminal and the NTN network equipment changes dynamically, and the second information transmitted by the terminal uplink at different times may be different. The change in the second information is mainly due to the change in the time length caused by the relative motion between the NTN network equipment and the terminal.

[0157] In some embodiments, the first information is used to determine the validity period of the terminal's location information.

[0158] It is understood that the terminal determines the validity period of the terminal's location information based on the first information, and determines whether to determine the second information based on whether the validity period of the terminal's location information has expired. It is worth noting that if the validity period of the terminal's location information has not expired, the terminal can maintain synchronization with the NTN network device and the terminal may not determine the second information.

[0159] In some embodiments, the location information of the terminal may be location information obtained by the terminal performing Global Navigation Satellite System (GNSS) measurement.

[0160] In some embodiments, the validity period of the location information may be preconfigured by the GNSS system. For example, the terminal may obtain the validity period of the location information from a Global Positioning System (GPS) module.

[0161] In other embodiments, the validity period of the location information may be notified to the terminal by the NTN network device through system information or signaling.

[0162] It should be noted that the terminal needs to obtain location information to determine the timing compensation for uplink transmission based on this location information. However, due to the mobility of NTN network equipment and / or terminals, the location information obtained by the terminal based on GNSS measurements has a certain validity period (GNSS Validity Duration). This means that the location information is only valid for a certain period of time. After this validity period, the terminal's location information becomes invalid and the terminal enters an idle state. It is understood that when the validity period of the terminal's location information expires, the second information transmitted by the terminal in the uplink will also need to be adjusted.

[0163] The terminal needs to re-perform GNSS measurement, but re-performing GNSS measurement for a terminal in an idle state will cause data transmission delay and increase energy consumption.

[0164] In some embodiments, the first information may indicate at least one of the following:

[0165] The first position of the terminal;

[0166] The validity period of the first position.

[0167] In some embodiments, the first position can be used to at least determine a timing advance of uplink transmission of the terminal within a validity period of the first information.

[0168] In some embodiments, the network equipment of the non-terrestrial network NTN determines the third information according to the uplink transmission of the terminal.

[0169] It should be noted that the network equipment of the non-terrestrial network NTN may determine the third information according to the arrival status of the uplink signal and / or uplink data sent by the terminal.

[0170] In some embodiments, the terminal receives configuration information sent by the NTN network device and performs uplink transmission based on the transmission resources indicated by the configuration information; the uplink transmission is used for the NTN network device to determine the third information.

[0171] In some embodiments, the configuration information indicates at least one of the following:

[0172] Uplink signal;

[0173] Uplink data

[0174] Transmission resources configured for uplink signals or uplink data.

[0175] Step S2102: The network device of the non-terrestrial network NTN sends third information to the terminal.

[0176] In some embodiments, the location information of the terminal exceeds the validity period, or the validity period of the location information of the terminal expires, and the network device of the non-terrestrial network NTN sends third information to the terminal.

[0177] In some embodiments, if the location information of the terminal has not expired, the network device of the non-terrestrial network NTN sends third information to the terminal.

[0178] It should be noted that the NTN network device may send the third information to the terminal after the terminal location information expires, or before the terminal location information expires, that is, within the validity period of the terminal location information.

[0179] In some embodiments, the terminal receives third information sent by the network device.

[0180] In some embodiments, the location information of the terminal exceeds the validity period, and the terminal receives third information sent by the network device.

[0181] In some embodiments, the location information of the terminal has not exceeded the validity period, and the terminal receives third information sent by the network device; the third information is used by the terminal to determine the second information when the validity period of the location information of the terminal has expired.

[0182] It should be noted that if the terminal's location information remains valid, the terminal can also receive the third information sent by the NTN network device. In this case, since the terminal's location information is valid, the terminal can maintain synchronization with the NTN network device without using the third information to determine the second information. If the terminal's location information expires, the terminal can determine the second information based on the pre-received third information to continue to maintain synchronization with the NTN network device.

[0183] In some embodiments, the third information may be carried in Radio Resource Control (RRC) layer signaling;

[0184] Alternatively, the third information may be carried in a control element (CE) of a media access control (MAC);

[0185] Alternatively, the third information may be carried in physical layer signaling.

[0186] In some embodiments, the RRC layer signaling may be downlink RRC layer signaling, for example, an RRC connection release message or RRC configuration information.

[0187] In some embodiments, the physical layer signaling may include downlink control information (DCI).

[0188] In some embodiments, RRC layer signaling, MAC CE or physical layer signaling may add an information field to specifically carry the third information.

[0189] It is understandable that the existing information field can be modified by RRC layer signaling, MAC CE or physical layer signaling, so that the third information can be carried in the existing information field without adding a new information field, thereby reducing signaling overhead.

[0190] Exemplarily, the third information may be carried in reserved bits of an existing information field.

[0191] As another example, the third information may be multiplexed with other information in an existing information field of RRC layer signaling, MAC CE or physical layer signaling.

[0192] In some embodiments, the third information is carried in a Timing Advance Command (TAC). The TAC can be carried in a MAC CE and sent by the network device to the terminal through a Random Access Response (RAR) or MSGB. Alternatively, the TAC can be sent by the network device to the terminal through a MAC CE bearer after the terminal establishes an RRC connection, thereby enabling the terminal to adjust the TA value to better synchronize with the network device.

[0193] It can be understood that the network device of the NTN may directly send the TAC including the third information to the terminal.

[0194] In some embodiments, the network device of the NTN sends fourth information to the terminal.

[0195] In some embodiments, the fourth information indicates one or more candidate TA drift rates configured for the terminal.

[0196] It is understandable that the network device of the NTN may pre-configure one or more candidate TA drift rates, ie, a TA drift rate set, for the terminal, and inform the terminal of the pre-configured TA drift rate set by sending the fourth information to the terminal.

[0197] In some embodiments, the TAC is configured to determine the TA drift rate included in the second information from among one or more candidate TA drift rates.

[0198] It should be noted that the TAC may include one or more indicator bits, and different values ​​of the indicator bits correspond to different index numbers of the alternative TA drift rates. The terminal may determine the alternative TA drift rate corresponding to the bit value of the indicator bit in the TAC, and determine the alternative TA drift rate as the TA drift rate included in the second information.

[0199] In some embodiments, an information field may be added to the TAC to carry one or more indication bits. The information field may include one or more octets.

[0200] In other embodiments, the indication bit may be a reserved bit in the TAC. It is understood that the reserved bit in the TAC can be directly utilized without changing the TAC structure; different values ​​of the reserved bit indicate different index numbers of the candidate TA drift rate. In other embodiments, the fourth information may be configuration information.

[0201] Here, the configuration information is used to configure uplink transmission resources and related information of the timing advance corresponding to the uplink transmission.

[0202] In some embodiments, the third information may be carried in the configuration information.

[0203] In some embodiments,

[0204] The NTN network device sends a radio resource control (RRC) layer signaling including the fourth information to the terminal;

[0205] or,

[0206] The NTN network device sends a Media Access Control (MAC) Control Element (CE) containing the fourth information to the terminal;

[0207] or,

[0208] The NTN network device sends physical layer signaling containing the fourth information to the terminal.

[0209] In some embodiments, the RRC layer signaling may be downlink RRC layer signaling, for example, an RRC connection release message or RRC configuration information.

[0210] In some embodiments, the physical layer signaling may include downlink control information (DCI).

[0211] In some embodiments, RRC layer signaling, MAC CE or physical layer signaling may add a new information field to specifically carry the fourth information.

[0212] It is understandable that the RRC layer signaling, MAC CE or physical layer signaling can be modified to add an information field and carry the fourth information in the information field to reduce signaling overhead.

[0213] In other embodiments, RRC layer signaling, MAC CE or physical layer signaling may include one or more reserved information fields, and the fourth information is carried through the reserved information fields.

[0214] It is understandable that the fourth information can be directly carried in the existing information field of the RRC layer signaling, MAC CE or physical layer signaling, which can reduce the signaling overhead on the one hand and eliminate the need to modify the signaling on the other hand.

[0215] Step S2103: The terminal determines the second information.

[0216] In some embodiments, the terminal determines the second information based on the first information.

[0217] It is understood that the terminal determines the validity period of the terminal's location information based on the first information, and determines whether to determine the second information based on whether the validity period of the terminal's location information has expired. It is worth noting that if the validity period of the terminal's location information has not expired, the terminal can maintain synchronization with the NTN network device and the terminal may not determine the second information.

[0218] In some embodiments, the validity period of the terminal's location information expires, and the terminal determines the second information.

[0219] In some embodiments, the terminal may determine the second information according to the third information sent by the network device of the NTN.

[0220] In some embodiments, the second information may include at least one of the following:

[0221] Timing Advance TA drift rate;

[0222] Timed advance TA adjustment amount.

[0223] It is understandable that the terminal may directly determine the TA drift rate and / or TA adjustment amount in the third information as the TA drift rate and / or TA adjustment amount included in the second information.

[0224] Step S2104: The terminal maintains synchronization with the network equipment of the NTN.

[0225] In some embodiments, the terminal maintains synchronization with the network device of the NTN according to the second information.

[0226] In some embodiments, the terminal may determine a timing advance value for uplink transmission based on the second information.

[0227] It is understandable that the terminal can achieve synchronization with the network device of the NTN according to the timing advance value of the uplink transmission configured by the network device.

[0228] In some embodiments, the terminal may determine a timing advance value for uplink transmission based on the second information, including:

[0229] determining a TA adjustment amount in a time unit according to the second information;

[0230] Based on the TA adjustment amount, the TA value of the corresponding time unit is adjusted.

[0231] It can be understood that the time unit may be a time unit corresponding to uplink transmission.

[0232] In some embodiments, a time unit may include: a symbol, a mini-slot, or a time slot.

[0233] It should be noted that adjusting the TA value of the corresponding time unit based on the TA adjustment amount can be understood as adjusting the TA value of the terminal's last uplink transmission based on the TA adjustment amount to obtain the TA value of the terminal's uplink transmission when the validity period of the terminal's location information expires.

[0234] In some embodiments, the terminal may determine the interval time between the current uplink transmission and the previous uplink transmission, determine the TA adjustment amount of the current uplink transmission according to the TA drift rate and the interval time; and adjust the TA value of the current uplink transmission based on the TA adjustment amount.

[0235] In some embodiments, the term "information" can be interchangeable with terms such as "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "field", and "data".

[0236] In some embodiments, the term "send" can be interchanged with terms such as "transmit", "report", and "transmit".

[0237] The information processing method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S2104. For example, step S2103 combined with step S2104 may be implemented as an independent embodiment, but is not limited thereto.

[0238] In some embodiments, steps S2101 and S2102 are optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that the terminal can determine the second information based on the ephemeris information without the network device determining and sending the third information.

[0239] In some embodiments, steps S2101, S2102, and S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that if the validity period of the terminal's location information has not expired, the terminal can directly maintain synchronization with the NTN network device based on the GNSS information.

[0240] FIG2b is an interactive diagram illustrating an information processing method according to an exemplary embodiment. As shown in FIG2b , the embodiment of the present disclosure relates to an information processing method for a communication system 100, the method comprising:

[0241] Step S2201: The terminal determines the second information.

[0242] In some embodiments, the terminal determines the second information based on the first information.

[0243] In some embodiments, the first information is used to determine the validity period of the terminal's location information.

[0244] It is understood that the terminal determines the validity period of the terminal's location information based on the first information, and determines whether to determine the second information based on whether the validity period of the terminal's location information has expired. It is worth noting that if the validity period of the terminal's location information has not expired, the terminal can maintain synchronization with the NTN network device and the terminal may not determine the second information.

[0245] In some embodiments, the validity period of the terminal's location information expires, and the terminal determines the second information.

[0246] In some embodiments, the location information of the terminal may be location information obtained by the terminal performing Global Navigation Satellite System (GNSS) measurement.

[0247] In some embodiments, the validity period of the location information may be preconfigured by the GNSS system. For example, the terminal may obtain the validity period of the location information from a Global Positioning System (GPS) module.

[0248] In other embodiments, the validity period of the location information may be notified to the terminal by the NTN network device through system information or signaling.

[0249] It should be noted that the terminal needs to obtain location information to determine the timing compensation for uplink transmission based on this location information. However, due to the mobility of NTN network equipment and / or terminals, the location information obtained by the terminal based on GNSS measurements has a certain validity period (GNSS Validity Duration). This means that the location information is only valid for a certain period of time. After this validity period, the terminal's location information becomes invalid and the terminal enters an idle state. It is understood that when the first information expires, that is, the validity period of the terminal's location information expires, the second information transmitted by the terminal in the uplink will also need to be adjusted.

[0250] The terminal needs to re-perform GNSS measurement, but re-performing GNSS measurement for a terminal in an idle state will cause data transmission delay and increase energy consumption.

[0251] In some embodiments, the second information is used to maintain synchronization between the terminal and the network device of the NTN when the validity period of the terminal's location information expires.

[0252] In some embodiments, the second information is used by the terminal to perform uplink transmission when the validity period of the terminal's location information expires.

[0253] In some embodiments, the second information is used to compensate for a transmission delay of an uplink transmission of the terminal when the validity period of the terminal's location information expires.

[0254] It should be noted that in the uplink transmission, the terminal needs to send the uplink signal a certain amount of time in advance relative to the downlink transmission in a certain time unit (for example, the time unit may include but is not limited to a subframe, a time slot, a radio frame and / or an OFDM symbol, etc.) or a certain absolute time unit, that is, the timing advance TA, so that the signal arrival time of all terminals in the cell on the network side is consistent, and the transmission delay between the network equipment and the terminal is compensated, so that the uplink transmission unit and the downlink transmission unit on the network side are aligned in time.

[0255] It is worth noting that in an NTN network, the position between the terminal and the NTN network equipment changes dynamically, and the second information transmitted by the terminal uplink at different times may be different. The change in the second information is mainly due to the change in the time length caused by the relative motion between the NTN network equipment and the terminal.

[0256] In some embodiments, the first information may indicate at least one of the following:

[0257] The first position of the terminal;

[0258] The validity period of the first position.

[0259] In some embodiments, the first position can be used to at least determine a timing advance of uplink transmission of the terminal within a validity period of the first information.

[0260] In some embodiments, determining the second information based on the first information may include:

[0261] determining fifth information, wherein the fifth information is used to determine a second location of the terminal;

[0262] The TA drift rate included in the second information is determined according to the first position and the second position determined by the first information.

[0263] It should be noted that the second location may be the current location of the terminal.

[0264] In some embodiments, the terminal can determine the change in relative position between the terminal and the NTN network device after the validity period of the terminal's location information expires based on the first location and the second location; and determine the TA drift rate included in the second information based on the change in relative position.

[0265] It is understandable that the change in the relative position between the terminal and the NTN network device can be understood as the change in the relative position between the terminal and the NTN network device during the interval between the current uplink transmission and the last uplink transmission of the terminal.

[0266] In some embodiments, determining the fifth information may include:

[0267] Obtaining sixth information;

[0268] The fifth information is determined based on the sixth information.

[0269] In some embodiments, the sixth information is used to determine a mobility status of a network device of the NTN.

[0270] In some embodiments, the sixth information may be ephemeris information.

[0271] In some embodiments, the ephemeris information is used to compensate for transmission delay and / or frequency offset from the terminal to the network equipment of the NTN.

[0272] In some embodiments, the ephemeris information may be sent by the base station to the UE.

[0273] In some embodiments, the ephemeris information may be information related to the position and / or velocity of a satellite.

[0274] In some embodiments, the ephemeris information may include at least one of the following:

[0275] Satellite coordinates;

[0276] Satellite orbit altitude;

[0277] Location information of the subsatellite point;

[0278] Satellite orbital inclination;

[0279] Right ascension of the ascending node;

[0280] The length of the semi-major axis of the satellite orbit ellipse;

[0281] The elliptical eccentricity of the satellite's orbit.

[0282] Step S2202: The terminal maintains synchronization with the network equipment of the NTN.

[0283] In some embodiments, the terminal maintains synchronization with the network device of the NTN according to the second information.

[0284] In some embodiments, the terminal may determine a timing advance value for uplink transmission based on the second information.

[0285] It is understandable that the terminal can achieve synchronization with the network device of the NTN according to the timing advance value of the uplink transmission configured by the network device.

[0286] In some embodiments, the terminal may determine a timing advance value for uplink transmission based on the second information, including:

[0287] determining a TA adjustment amount in a time unit according to the second information;

[0288] Based on the TA adjustment amount, the TA value of the corresponding time unit is adjusted.

[0289] It can be understood that the time unit may be a time unit corresponding to uplink transmission.

[0290] In some embodiments, a time unit may include: a symbol, a mini-slot, or a time slot.

[0291] It should be noted that adjusting the TA value of the corresponding time unit based on the TA adjustment amount can be understood as adjusting the TA value of the terminal's last uplink transmission based on the TA adjustment amount to obtain the TA value of the terminal's uplink transmission when the validity period of the terminal's location information expires.

[0292] In some embodiments, the terminal may determine the interval time between the current uplink transmission and the previous uplink transmission, determine the TA adjustment amount of the current uplink transmission according to the TA drift rate and the interval time; and adjust the TA value of the current uplink transmission based on the TA adjustment amount.

[0293] The information processing method involved in the embodiment of the present disclosure may include at least one of step S2201 to step S2202. For example, step S2202 may be implemented as an independent embodiment, but is not limited thereto.

[0294] In some embodiments, step S2201 is optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that if the validity period of the terminal's location information has not expired, the terminal can directly maintain synchronization with the NTN network device based on the GNSS information.

[0295] FIG3a is a flow chart of an information processing method according to an exemplary embodiment. As shown in FIG3a, the embodiment of the present disclosure relates to an information processing method, which is executed by terminal 101 and includes:

[0296] Step S3101: The terminal receives third information sent by a network device of the non-terrestrial network NTN.

[0297] In some embodiments, the optional implementation of step S3101 can refer to the optional implementation of step S2102 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

[0298] Step S3102: The terminal determines the second information.

[0299] In some embodiments, the optional implementation of step S3102 can refer to the optional implementation of step S2103 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

[0300] Step S3103: The terminal maintains synchronization with the network equipment of the NTN.

[0301] In some embodiments, the optional implementation of step S3103 can refer to the optional implementation of step S2104 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

[0302] The information processing method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3103 may be implemented as an independent embodiment, for example, step S3102 combined with step S3103 may be implemented as an independent embodiment, but is not limited thereto.

[0303] In some embodiments, step S3101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that the terminal may determine the second information based on the ephemeris information, without the need for the network device to determine and send the third information.

[0304] In some embodiments, steps S3101 and S3102 are optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that if the validity period of the terminal's location information has not expired, the terminal can directly maintain synchronization with the NTN network device based on the GNSS information.

[0305] FIG3b is a flow chart of an information processing method according to an exemplary embodiment. As shown in FIG3b, the embodiment of the present disclosure relates to an information processing method, which is executed by terminal 101 and includes:

[0306] Step S3201: The terminal determines the second information.

[0307] In some embodiments, the optional implementation of step S3201 can refer to the optional implementation of step S2102 in Figure 2b and other related parts of the embodiment involved in Figure 2b, which will not be repeated here.

[0308] Step S3202: The terminal maintains synchronization with the network equipment of the NTN.

[0309] In some embodiments, the optional implementation of step S3202 can refer to the optional implementation of step S2102 in Figure 2b and other related parts of the embodiment involved in Figure 2b, which will not be repeated here.

[0310] The information processing method involved in the embodiment of the present disclosure may include at least one of step S3201 to step S3202. For example, step S3202 may be implemented as an independent embodiment, but is not limited thereto.

[0311] In some embodiments, step S3101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that if the validity period of the terminal's location information has not expired, the terminal can directly maintain synchronization with the NTN network device based on the GNSS information.

[0312] FIG3c is a flow chart of an information processing method according to an exemplary embodiment. As shown in FIG3c, the embodiment of the present disclosure relates to an information processing method, which is executed by terminal 101 and includes:

[0313] Step S3301: Determine second information based on the first information.

[0314] In some embodiments, the first information is used to determine the validity period of the terminal's location information.

[0315] In some embodiments, the second information is used to maintain synchronization between the terminal and a network device of the non-terrestrial network NTN when the validity period of the location information of the terminal expires.

[0316] In some embodiments, the method further comprises:

[0317] Receive third information from the network device; wherein the third information is used by the terminal to determine the second information.

[0318] In some embodiments, the third information includes at least one of the following:

[0319] Timing Advance TA drift rate;

[0320] Adjust the amount in advance regularly.

[0321] In some embodiments, the third information is carried in a timing advance command TAC.

[0322] In some embodiments, the method further comprises:

[0323] receiving fourth information, wherein the fourth information indicates one or more candidate TA drift rates configured for the terminal;

[0324] The TAC is configured to determine a TA drift rate included in the second information from among one or more candidate TA drift rates.

[0325] In some embodiments, determining the second information based on the first information includes:

[0326] determining fifth information, wherein the fifth information is used to determine a second location of the terminal;

[0327] The TA drift rate included in the second information is determined according to the first position and the second position determined by the first information.

[0328] In some embodiments, determining the fifth information includes:

[0329] Acquire sixth information; wherein the sixth information is used to determine the mobility status of the NTN network device;

[0330] The fifth information is determined based on the sixth information.

[0331] In some embodiments, the method further comprises:

[0332] The second information is the TA drift rate, and the TA adjustment amount in one time unit is determined according to the TA drift rate;

[0333] Based on the TA adjustment amount, the TA value of the corresponding time unit is adjusted.

[0334] In some embodiments, the method further comprises:

[0335] The second information is the TA adjustment amount, and the TA value of the corresponding time unit is adjusted according to the TA adjustment amount.

[0336] FIG4a is a flow chart of an information processing method according to an exemplary embodiment. As shown in FIG4a, the embodiment of the present disclosure relates to an information processing method, which is executed by the network device 102 and includes:

[0337] Step S4101: The network device of the NTN determines the third information.

[0338] In some embodiments, the optional implementation of step S4101 can refer to the optional implementation of step S2101 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

[0339] Step S4102: The NTN network device sends third information to the terminal.

[0340] In some embodiments, the optional implementation of step S4102 can refer to the optional implementation of step S2102 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

[0341] The information processing method involved in the embodiment of the present disclosure may include at least one of step S4101 to step S4102. For example, step S4101 may be implemented as an independent embodiment, but is not limited thereto.

[0342] In some embodiments, steps S4101 and S4102 are optional, and one or more of these steps may be omitted or replaced in different embodiments. It is understood that the terminal can determine the second information independently based on the ephemeris information without the network device sending the third information.

[0343] FIG4b is a flow chart of an information processing method according to an exemplary embodiment. As shown in FIG4b , the embodiment of the present disclosure relates to an information processing method, which is executed by the network device 102 and includes:

[0344] Step S4201: The NTN network device sends third information to the terminal.

[0345] In some embodiments, the third information is used by the terminal to determine the second information.

[0346] In some embodiments, the second information is used to maintain synchronization between the terminal and the network device of the NTN when the validity period of the terminal's location information expires.

[0347] In some embodiments, the third information includes at least one of the following:

[0348] Timing Advance TA drift rate;

[0349] Adjust the amount in advance regularly.

[0350] In some embodiments, the third information is carried in a timing advance command TAC.

[0351] In some embodiments, the method further comprises:

[0352] Sending fourth information; the fourth information indicates one or more candidate TA drift rates configured for the terminal;

[0353] The TAC is configured to determine a TA drift rate included in the second information from among one or more candidate TA drift rates.

[0354] In some embodiments, the method further comprises:

[0355] The third information is determined according to the uplink transmission of the terminal.

[0356] FIG5 is an interactive diagram illustrating an information processing method according to an exemplary embodiment. As shown in FIG5 , the embodiment of the present disclosure relates to an information processing method for a communication system 100, and the method includes one of the following steps:

[0357] Step S5101: The network device sends third information to the terminal.

[0358] In some embodiments, the network device is a network device of an NTN.

[0359] In some embodiments, the third information is used by the terminal to determine the second information.

[0360] Step S5102: The terminal determines the second information based on the first information and the third information.

[0361] In some embodiments, the first information is used to determine the validity period of the terminal's location information.

[0362] In some embodiments, the second information is used to maintain synchronization between the terminal and the network device of the NTN when the validity period of the terminal's location information expires.

[0363] In some embodiments, the above method may include the methods of the above-mentioned communication system side, terminal side, access network equipment side, core network equipment side, etc., which will not be repeated here.

[0364] When the original GNSS information of the terminal expires, that is, when the GNSS validity duration expires, the terminal maintains its uplink transmission.

[0365] It should be noted that the validity period of GNSS corresponds to the first information disclosed in this disclosure.

[0366] The terminal determines that it can maintain the time information of its uplink transmission when the original GNSS information expires. Within the time information, the terminal performs uplink synchronization in the following ways:

[0367] Solution 1: The terminal receives high-layer signaling sent by the base station, such as RRC signaling, MAC CE or physical layer signaling, to determine configuration information, where the configuration information includes indication information of a timing advance drift rate (TA drift rate).

[0368] In some embodiments, the configuration information may correspond to the fourth information of the present disclosure.

[0369] Exemplarily, the TA drift rate may be sent to the terminal via the TAC.

[0370] For example, the terminal receives configuration information sent by the base station to determine a set of TA drift rates, and the terminal determines the TA drift rate within the time information based on the TAC command.

[0371] It should be noted that the base station may determine the TA drift rate of the terminal based on reception of uplink signals.

[0372] Exemplarily, the terminal may receive configuration information from the base station and determine the required transmission of uplink signals or uplink data. The base station determines the TA drift rate of the terminal based on the arrival of the uplink signals or uplink data.

[0373] As shown in Figure 6a, Figure 6a is a schematic diagram showing a method of adjusting the TA value of terminal uplink transmission based on the TA drift rate according to an exemplary embodiment. The terminal adjusts the timing advance (TA value) of each uplink transmission unit based on the TA drift rate.

[0374] It should be noted that the uplink transmission unit corresponds to the time unit of the present disclosure.

[0375] Solution 2: The terminal receives high-layer signaling sent by the base station, such as RRC signaling, MAC CE or physical layer signaling to determine configuration information, and the configuration information includes TAC indication information.

[0376] As shown in Figure 6b, Figure 6b is a schematic diagram showing a method of adjusting the TA value of terminal uplink transmission based on the TA adjustment amount indicated by the TAC according to an exemplary embodiment. The terminal determines its TA value based on the original GNSS information.

[0377] Solution 3: The terminal determines the TA drift rate.

[0378] Exemplarily, the terminal determines its TA drift rate based on the ephemeris information and its original GNSS information.

[0379] In some embodiments, the ephemeris information corresponds to the sixth information of the present disclosure.

[0380] The terminal adjusts its TA value in each uplink transmission unit (slot) based on the TA drift rate.

[0381] The embodiments of the present disclosure also provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device or a core network device) in any of the above methods.

[0382] It should be understood that the division of the various units or modules in the above devices is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above devices, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0383] In the embodiments of the present disclosure, a processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of a hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0384] Figure 7a is a schematic diagram of the structure of a terminal according to an exemplary embodiment. As shown in Figure 7a, the terminal 101 includes: a determination module 1011; the determination module 1011 is configured to determine second information based on first information, wherein the first information is used to determine the validity period of the terminal's location information; the second information is used to maintain synchronization between the terminal and a network device of the non-terrestrial network NTN when the terminal's location information exceeds the validity period. Optionally, the determination module 1011 is used to execute the steps related to information reception and determination performed by the terminal in any of the above information processing methods, which will not be repeated here. Optionally, the terminal 101 also includes a sending module, which is used to execute the steps related to sending performed by the terminal in any of the above methods, which will not be repeated here.

[0385] Figure 7b is a schematic diagram of the structure of a network device according to an exemplary embodiment. As shown in Figure 7b, network device 102 includes: a second sending module 1021, configured to send third information to a terminal; wherein the third information is used by the terminal to determine second information; and the second information is used to maintain synchronization between the terminal and the NTN network device when the terminal's location information exceeds the validity period. Optionally, sending module 1021 is configured to execute the steps related to information sending and receiving performed by the terminal in any of the above information processing methods, which are not further described here. Optionally, network device 102 also includes a determination module, which is configured to execute the steps related to determination performed by the terminal in any of the above methods, which are not further described here.

[0386] Figure 8a is a schematic diagram of the structure of a communication device 8100 according to an exemplary embodiment. Communication device 8100 can be a network device (e.g., an access network device or a core network device), a terminal (e.g., a user equipment), a chip, a chip system, or a processor that supports a network device implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal implementing any of the above information processing methods. Communication device 8100 can be used to implement the information processing methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0387] As shown in Figure 8a, the communication device 8100 includes one or more processors 8101. The processor 8101 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, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The processor 8101 is used to call instructions to enable the communication device 8100 to execute any of the above communication methods.

[0388] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may be located outside the communication device 8100.

[0389] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are performed by the transceiver 8103, and the other steps are performed by the processor 8101.

[0390] In some embodiments, a transceiver may include a receiver and a transmitter, which 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.

[0391] Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuits 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuits 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0392] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8a. 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.

[0393] FIG8b is a schematic structural diagram of a chip 8200 according to an exemplary embodiment. If the communication device 8100 can be a chip or a chip system, reference can be made to the schematic structural diagram of the chip 8200 shown in FIG8b , but the present invention is not limited thereto.

[0394] The chip 8200 includes one or more processors 8201 , and the processor 8201 is used to call instructions so that the chip 8200 executes any of the above communication methods.

[0395] In some embodiments, chip 8200 further includes one or more interface circuits 8202, which are connected to memory 8203. Interface circuit 8202 can be used to receive signals from memory 8203 or other devices, and can be used to send signals to memory 8203 or other devices. For example, interface circuit 8202 can read instructions stored in memory 8203 and send the instructions to processor 8201. Optionally, the terms interface circuit, interface, transceiver pin, and transceiver are interchangeable.

[0396] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0397] The present disclosure also provides a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute 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 may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but may also be a transient storage medium.

[0398] The present disclosure further provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above communication methods. Optionally, the program product is a computer program product.

[0399] The present disclosure also provides a computer program, which, when executed on a computer, enables the computer to execute any one of the above communication methods.

[0400] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow from the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0401] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An information processing method, wherein: The method comprises: Based on the first information, second information is determined, wherein the first information is used to determine the validity period of the terminal's location information; and the second information is used to maintain synchronization between the terminal and a network device of a non-terrestrial network NTN when the validity period of the terminal's location information expires.

2. The method according to claim 1, wherein: The method further comprises: Receive third information from a network device; wherein the third information is used by the terminal to determine the second information.

3. The method according to claim 2, wherein: The third information includes at least one of the following: Timing advance TA drift rate; Adjust the amount regularly in advance.

4. The method according to claim 2 or 3, wherein: The third information is carried in the timing advance command TAC.

5. The method according to claim 4, wherein: The method further comprises: receiving fourth information, wherein the fourth information indicates one or more candidate TA drift rates configured for the terminal; The TAC is used to determine the TA drift rate included in the second information from among one or more candidate TA drift rates.

6. The method according to claim 1, wherein: The determining the second information according to the first information includes: Determining fifth information, wherein the fifth information is used to determine the second location of the terminal; The TA drift rate included in the second information is determined according to the first position and the second position determined by the first information.

7. The method according to claim 6, wherein: The determining of the fifth information includes: Acquire sixth information; wherein the sixth information is used to determine the mobility status of the network device of the NTN; The fifth information is determined according to the sixth information.

8. The method according to any one of claims 1 to 7, wherein: The method further comprises: The second information is a TA drift rate, and a TA adjustment amount in a time unit is determined according to the TA drift rate; Based on the TA adjustment amount, the TA value of the corresponding time unit is adjusted.

9. The method according to any one of claims 1 to 7, wherein: The method further comprises: The second information is a TA adjustment amount, and the TA value of the corresponding time unit is adjusted according to the TA adjustment amount.

10. An information processing method, wherein: The method comprises: The NTN network device sends third information to the terminal; wherein the third information is used by the terminal to determine second information; and the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

11. The method according to claim 10, wherein: The third information includes at least one of the following: Timing advance TA drift rate; Adjust the amount regularly in advance.

12. The method according to claim 10 or 11, wherein: The third information is carried in the time advance command TAC.

13. The method according to claim 12, wherein: The method further comprises: Sending fourth information; the fourth information indicating one or more candidate TA drift rates configured for the terminal; The TAC is used to determine the TA drift rate included in the second information from among one or more candidate TA drift rates.

14. The method according to any one of claims 10 to 13, wherein: The method further comprises: The third information is determined according to the uplink transmission of the terminal.

15. An information processing method, wherein: The method comprises: The NTN network device sends third information to the terminal; the third information is used by the terminal to determine the second information; Based on the first information and the third information, the terminal determines the second information; the first information is used to determine the validity period of the terminal's location information; the second information is used to maintain synchronization between the terminal and the NTN network device when the validity period of the terminal's location information expires.

16. A terminal, wherein: The terminal comprises: The determination module is configured to determine second information based on first information, wherein the first information is used to determine the validity period of the terminal's location information; and the second information is used to maintain synchronization between the terminal and a network device of a non-terrestrial network NTN when the validity period of the terminal's location information expires.

17. A network device, wherein: The network device comprises: The sending module is configured to send third information to the terminal; wherein the third information is used by the terminal to determine the second information; and the second information is used to maintain synchronization between the terminal and the network device of the NTN when the validity period of the location information of the terminal expires.

18. A communication system, wherein: The communication system includes a terminal and a network device; the terminal is configured to implement the information processing method according to any one of claims 1 to 9, and the network device is configured to implement the information processing method according to any one of claims 10 to 14.

19. A communication device, wherein: The communication device comprises: one or more processors; The processor is used to call instructions so that the communication device executes the information processing method according to any one of claims 1 to 9 or claims 10 to 14.

20. A storage medium, wherein: The storage medium stores instructions, and when the instructions are executed on the communication device, the communication device executes the information processing method according to any one of claims 1 to 9 or claims 10 to 14.

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