Communication method, terminal, network device, communication system, and storage medium

Abstract

Provided in the embodiments of the present disclosure are a communication method, a network device, a terminal, a communication system, and a storage medium. The method comprises: sending first information to a terminal, wherein the first information is used for indicating at least one of the following: prohibiting the terminal from selecting a first cell as a target cell for radio resource control (RRC) connection reestablishment in a cell selection process after a cell handover failure, and the first cell comprises at least one of the following: an original cell before cell handover; a cell in a network energy-saving (NES) state; triggering NES-based cell handover; and a configuration parameter of conditional handover (CHO) of NES-based triggering. Therefore, cell handover failures are reduced, and the reliability of cell handover is improved.

Description

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

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

[0002] During a cell handover, if the handover fails, the terminal is triggered to perform cell selection. After selecting a suitable cell, the Radio Resource Control (RRC) connection re-establishment process is initiated. In a conditional handover (CHO) scenario, if the handover fails, the terminal is triggered to perform cell selection. If the selected target cell is a candidate cell for CHO, the terminal can perform the CHO process to the target cell. If CHO fails again, the cell selection process is performed again, and a suitable cell is selected, and the RRC connection re-establishment process is initiated.

[0003] Summary of the Invention

[0004] During the cell switching process, there may be a switching failure, and the reliability of the cell switching is low.

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

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method is provided, the method being performed by a network device, the method comprising:

[0007] Sending first information to the terminal;

[0008] The first information is used to indicate at least one of the following:

[0009] The terminal is prohibited from selecting a first cell as a target cell for reestablishing a radio resource control (RRC) connection during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving (NES) state;

[0010] Triggering NES-based cell handover;

[0011] Switches CHO configuration parameters based on NES trigger conditions.

[0012] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a terminal, the method including:

[0013] Determining a target cell for RRC connection reestablishment based on the first information;

[0014] The first information is used to indicate at least one of the following:

[0015] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0016] Triggering NES-based cell handover;

[0017] Switches CHO configuration parameters based on NES trigger conditions.

[0018] According to a third aspect of an embodiment of the present disclosure, a communication method is provided, the method comprising:

[0019] The network device sends first information to the terminal;

[0020] The first information is used to indicate at least one of the following:

[0021] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0022] Triggering NES-based cell handover;

[0023] Switches CHO configuration parameters based on NES trigger conditions.

[0024] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, the network device comprising:

[0025] The transceiver module is configured as follows:

[0026] Sending first information to the terminal;

[0027] The first information is used to indicate at least one of the following:

[0028] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0029] Triggering NES-based cell handover;

[0030] Switches CHO configuration parameters based on NES trigger conditions.

[0031] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, comprising:

[0032] The processing module is configured to:

[0033] Determining a target cell for RRC connection reestablishment based on the first information;

[0034] The first information is used to indicate at least one of the following:

[0035] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0036] Triggering NES-based cell handover;

[0037] Switches CHO configuration parameters based on NES trigger conditions.

[0038] According to a sixth aspect of an embodiment of the present disclosure, a communication system is provided, wherein the communication system includes a network device and a terminal; the network device is configured to implement the method described in the first aspect, and the terminal is configured to implement the method described in the second aspect.

[0039] According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, the network device including:

[0040] one or more processors;

[0041] The network device is used to execute the method described in the first aspect.

[0042] According to an eighth aspect of an embodiment of the present disclosure, a terminal is provided, the terminal including:

[0043] one or more processors;

[0044] The terminal is used to execute the method described in the second aspect.

[0045] According to a ninth 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 method provided in the first aspect and / or the second aspect.

[0046] The technical solution provided by the embodiments of the present disclosure reduces the occurrence of cell switching failures and improves the reliability of cell switching.

[0047] 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

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0049] FIG1a is a schematic diagram showing a communication system architecture according to an exemplary embodiment;

[0050] FIG1b is a schematic diagram showing a communication system architecture according to an exemplary embodiment;

[0051] FIG2a is a schematic flow chart showing a communication method according to an exemplary embodiment;

[0052] FIG3a is a flow chart showing a communication method according to an exemplary embodiment;

[0053] FIG4a is a flow chart showing a communication method according to an exemplary embodiment;

[0054] FIG4b is a flow chart showing a communication method according to an exemplary embodiment;

[0055] FIG5a is a flow chart showing a communication method according to an exemplary embodiment;

[0056] FIG6a is a schematic structural diagram of a network device according to an exemplary embodiment;

[0057] FIG6 b is a schematic structural diagram of a terminal according to an exemplary embodiment;

[0058] FIG7a is a schematic structural diagram of a UE according to an exemplary embodiment;

[0059] Fig. 7b is a schematic structural diagram of a communication device according to an exemplary embodiment. DETAILED DESCRIPTION

[0060] Embodiments of the present disclosure provide a communication method, a network device, a terminal, a communication system, and a storage medium.

[0061] In a first aspect, an embodiment of the present disclosure provides sending first information to a terminal;

[0062] The first information is used to indicate at least one of the following:

[0063] The terminal is prohibited from selecting a first cell as a target cell for reestablishing a radio resource control (RRC) connection during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving (NES) state;

[0064] Triggering NES-based cell handover;

[0065] Switches CHO configuration parameters based on NES trigger conditions.

[0066] In the above embodiment, after the terminal receives the first information, it can perform at least one of the following: prohibiting the terminal from selecting the original cell before the cell switching as the target cell for radio resource control RRC connection reconstruction during the cell selection process after the cell switching fails; prohibiting the terminal from selecting a cell in the network energy saving NES state as the target cell during the cell selection process after the cell switching fails; triggering NES-based cell switching; performing cell switching based on the configuration parameters of the conditional switching CHO triggered by NES.

[0067] In conjunction with some embodiments of the first aspect, in some embodiments, sending the first information to the terminal includes:

[0068] Determine to trigger cell switching based on a network energy saving NES mode, and send the first information to the terminal;

[0069] The NES method includes at least one of the following:

[0070] Activate discontinuous transmission (DTX) in the cell;

[0071] Activate cell discontinuous reception DRX;

[0072] The community is closed.

[0073] In the above embodiment, the first information may be sent to the terminal in a scenario where cell switching is triggered based on different NES modes.

[0074] In combination with some embodiments of the first aspect, in some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES method.

[0075] In the above embodiment, after receiving the first information, the terminal may determine that the cell handover is a handover triggered based on the NES mode.

[0076] In conjunction with some embodiments of the first aspect, in some embodiments, sending the first information to the terminal includes:

[0077] Sending switching command information to the terminal;

[0078] The switching command information includes the first information.

[0079] In the above embodiment, the first information may be sent to the terminal via a cut command message.

[0080] In combination with some embodiments of the first aspect, in some embodiments, the switching command information is an RRC reconfiguration message.

[0081] In combination with some embodiments of the first aspect, in some embodiments, the original cell is a cell in the NES state.

[0082] In conjunction with some embodiments of the first aspect, in some embodiments, the cell in the NES state includes at least one of the following:

[0083] A cell in DTX mode;

[0084] The cell DTX mode is activated in the cell;

[0085] cells in DRX mode;

[0086] The cell DRX mode is activated.

[0087] In a community where the community is closed.

[0088] In conjunction with some embodiments of the first aspect, in some embodiments, sending the first information to the terminal includes:

[0089] Sending NES CHO configuration information to the terminal;

[0090] The configuration information includes the first information.

[0091] In the above embodiment, the first information may be sent to the terminal through configuration information of the NES CHO.

[0092] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0093] Sending fourth information to the terminal, where the fourth information is used to instruct the network device to enter the NES state.

[0094] In the above embodiment, the terminal may determine that the network device enters the NES state based on the fourth information.

[0095] With reference to some embodiments of the first aspect, in some embodiments, the configuration information is measurement reporting configuration information.

[0096] With reference to some embodiments of the first aspect, in some embodiments, the measurement reporting configuration information includes NES event information.

[0097] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following:

[0098] Sending second information to a neighboring base station, wherein the second information indicates an NES mode of a neighboring cell;

[0099] Sending third information to the terminal, wherein the third information indicates the NES mode of the serving cell.

[0100] In the above embodiment, the neighboring base station and the serving cell can obtain the NES mode through the second information and the third information respectively.

[0101] In a second aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal and includes:

[0102] Determining a target cell for RRC connection reestablishment based on the first information;

[0103] The first information is used to indicate at least one of the following:

[0104] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0105] Switches CHO configuration parameters based on NES trigger conditions.

[0106] In conjunction with some embodiments of the second aspect, in some embodiments, determining the target cell for RRC connection reestablishment based on the first information includes at least one of the following:

[0107] In the cell selection process after the cell handover fails, the original cell before the cell handover is not selected as the target cell for RRC connection reestablishment;

[0108] In the cell selection process after cell handover fails, a cell in the NES state is not selected as the target cell.

[0109] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0110] Receive the first information sent by the network device.

[0111] In conjunction with some embodiments of the second aspect, in some embodiments, the first information is information sent by the network device after determining that a cell handover is triggered based on a network energy saving NES mode; wherein the NES mode includes at least one of the following:

[0112] Activate discontinuous transmission (DTX) in the cell;

[0113] Activate cell discontinuous reception DRX;

[0114] The community is closed.

[0115] In combination with some embodiments of the second aspect, in some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES mode.

[0116] In conjunction with some embodiments of the second aspect, in some embodiments, receiving first information sent by a network device includes:

[0117] receiving switching command information sent by the network device;

[0118] The switching command information includes the first information.

[0119] In combination with some embodiments of the second aspect, in some embodiments, the switching command information is an RRC reconfiguration message.

[0120] In combination with some embodiments of the second aspect, in some embodiments, the original cell is a cell in the NES state.

[0121] In conjunction with some embodiments of the second aspect, in some embodiments, the cell in the NES state includes at least one of the following:

[0122] A cell in DTX mode;

[0123] The cell DTX mode is activated in the cell;

[0124] cells in DRX mode;

[0125] The cell DRX mode is activated.

[0126] In a community where the community is closed.

[0127] In conjunction with some embodiments of the second aspect, in some embodiments, receiving the first information sent by the network device includes:

[0128] Receiving NES CHO configuration information sent by the network device;

[0129] The configuration information includes the first information.

[0130] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0131] Receive fourth information sent by the network device, where the fourth information is used to instruct the network device to enter the NES state.

[0132] With reference to some embodiments of the second aspect, in some embodiments, the configuration information is measurement reporting configuration information.

[0133] With reference to some embodiments of the second aspect, in some embodiments, the measurement reporting configuration information includes NES event information.

[0134] In conjunction with some embodiments of the second aspect, in some embodiments, determining a target cell for radio resource control RRC connection reestablishment based on the first information includes:

[0135] It is determined that NES CHO fails and a value indicated by a first information field corresponding to the NES event information is a first value, and the target cell for radio resource control RRC connection reestablishment is determined based on the first information.

[0136] In combination with some embodiments of the second aspect, in some embodiments, determining that the value indicated by the first information field corresponding to the NES event information is a first value, and determining the target cell for radio resource control RRC connection reestablishment based on the first information includes:

[0137] Determine that NES CHO fails, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for CHO triggering is that the condition corresponding to the set NES event information is met, and determine the target cell for RRC connection reestablishment based on the first information.

[0138] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0139] Receive the first information sent by the physical layer of the terminal.

[0140] In conjunction with some embodiments of the second aspect, in some embodiments, determining a target cell for radio resource control RRC connection reestablishment based on the first information includes:

[0141] Determine that a radio link failure RLF or a handover failure HOF occurs, receive the first information sent by the physical layer of the terminal, and determine the target cell for RRC connection reestablishment based on the first information.

[0142] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0143] Receive third information sent by the network device, wherein the third information indicates the NES mode of the serving cell.

[0144] In a third aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

[0145] The network device sends first information to the terminal;

[0146] The first information is used to indicate at least one of the following:

[0147] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0148] Triggering NES-based cell handover;

[0149] Switches CHO configuration parameters based on NES trigger conditions.

[0150] In a fourth aspect, an embodiment of the present disclosure provides a network device, the network device comprising:

[0151] The transceiver module is configured as follows:

[0152] Sending first information to the terminal;

[0153] The first information is used to indicate at least one of the following:

[0154] The terminal is prohibited from selecting a first cell as a target cell for reestablishing a radio resource control (RRC) connection during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving (NES) state;

[0155] Triggering NES-based cell handover;

[0156] Switches CHO configuration parameters based on NES trigger conditions.

[0157] In a fifth aspect, an embodiment of the present disclosure provides a terminal, comprising:

[0158] The processing module is configured to:

[0159] Determining a target cell for RRC connection reestablishment based on the first information;

[0160] The first information is used to indicate at least one of the following:

[0161] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0162] Triggering NES-based cell handover;

[0163] Switches CHO configuration parameters based on NES trigger conditions.

[0164] In a sixth aspect, an embodiment of the present disclosure provides that the communication system includes a network device and a terminal; the network device is configured to implement the method described in the first aspect, and the terminal is configured to implement the method described in the second aspect.

[0165] In a seventh aspect, an embodiment of the present disclosure provides a network device, the network device including:

[0166] one or more processors;

[0167] The network device is used to execute the method provided in the first aspect.

[0168] In an eighth aspect, an embodiment of the present disclosure provides a terminal, the terminal including:

[0169] one or more processors;

[0170] The terminal is used to execute the method provided in the second aspect.

[0171] In a ninth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, which, when executed on a communication device, enable the communication device to execute the method described in the optional implementation of the first and second aspects.

[0172] In a tenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0173] In an eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0174] In a twelfth aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0175] It is understandable that the above-mentioned network devices, terminals, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in 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.

[0176] The present disclosure provides a communication method, a network device, a terminal, a communication system, and a storage medium. In some embodiments, the terms "communication method" and "information indication method" and "information processing method" are interchangeable, and the terms "communication system" and "information processing system" are interchangeable.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0182] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0183] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0188] 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.

[0189] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0190] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0191] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0192] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0193] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0194] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0195] 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.

[0196] FIG1a is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0197] As shown in FIG. 1 a , a communication system 100 includes a terminal 101 and a network device 102 .

[0198] In some embodiments, the network device 102 may include at least one of an access network device 1021 and a core network device 1022 .

[0199] In some embodiments, the access network device 1021 may be a satellite access network device.

[0200] In some embodiments, the core network device 1022 may be a core network device or a proxy core network device.

[0201] In some embodiments, the terminal 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0206] 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.

[0207] 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.

[0208] 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).

[0209] 5G was introduced in response to people's pursuit of speed, latency, high-speed mobility, energy efficiency, and the diversity and complexity of services in future life.

[0210] In some embodiments, the main application scenarios of 5G include: enhanced mobile ultra-wideband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine type communication (mMTC).

[0211] In some embodiments, eMBB still aims to provide users with multimedia content, services, and data, and demand for this is growing rapidly. Furthermore, since eMBB may be deployed in different scenarios, such as indoors, in urban areas, and in rural areas, its capabilities and requirements vary significantly. Therefore, it is not possible to generalize and requires detailed analysis based on specific deployment scenarios.

[0212] In some embodiments, typical applications of URLLC include industrial automation, power automation, remote medical operations (surgery), and traffic safety assurance.

[0213] In some embodiments, typical features of mMTC include: high connection density, small data volume, latency-insensitive services, low module cost and long service life.

[0214] After the introduction of 5G technology, the energy consumption of 5G base stations is four times that of LTE base stations, so network energy saving is an important means for operators to reduce the cost of operating 5G systems.

[0215] In some embodiments, in order to reduce network energy consumption, a network energy saving project is launched. The four supported NES functions include:

[0216] SSB-less Scell;

[0217] cell DTX / DRX;

[0218] Antenna port adaptation;

[0219] PDSCH transmission power adaptation.

[0220] In some embodiments, for a network energy-saving method for cell discontinuous transmission (DTX) or discontinuous transmission (DRX), the network side configures the cell's DTX or DRX operation pattern through dedicated radio resource control (RRC) signaling, i.e., configures a period, offset, and / or duration. During the onduration, the cell is in an active state and can receive and transmit data. The rest of the time is considered inactive time, and the network side generally does not receive or transmit data, except in special circumstances. For example, transmission processes such as synchronization signal blocks (SSB and PBCH blocks), master information block (MIB) messages, system information block (SIB) messages, paging messages, and random access channel (RACH) messages are not affected and proceed normally.

[0221] In some embodiments, when a cell enters Network Energy Saving (NES) mode, i.e., activates cell DTX or DRX, the UE needs to perform conditional handover (CHO). To facilitate the UE's CHO execution, the network side may configure the UE with NES CHO. Compared with the original CHO, this NES CHO is more likely to meet measurement events (e.g., A3, A4, and A5), making handover easier. In addition, to trigger the NES CHO execution due to NES, the network side will issue a command. When the handover command of the downlink control information (DCI) is received and the NES CHO meets the handover conditions, the terminal performs the handover.

[0222] In some embodiments, cell switching off is also supported, that is, the cell is shut down, and the terminal is also required to switch away as soon as possible.

[0223] In some embodiments, due to cell DTX or DRX activation or cell switch-off, a terminal supporting NES cannot operate or cannot meet the terminal's high performance requirements. Therefore, the terminal needs to handover to another cell. To this end, a conditional handover (CHO) for NES, namely NES CHO (Conditional Handover), has been introduced. It is also agreed that handover can be triggered based on a 1-bit instruction in the DCI. Specifically, if the NES CHO handover conditions are met and a DCI handover instruction is received from the network, handover is executed. For example, as shown in Figure 1b, the DCI is DCI format 2-9, which reuses the DCI for cell DTX or DRX activation or deactivation.

[0224] In some embodiments, since DCI 2-9 is a group common DCI, for a cell that is a primary cell (Pcell), a bit may be carried based on the network-side configuration indication. Setting this bit to "1" indicates that NES CHO execution is triggered, and setting it to "0" indicates that NES CHO execution is not triggered. A cell indication information block also includes cell DTX and cell DRX activation and deactivation indications. Whether the corresponding bit exists depends on whether cell DTX and cell DRX are configured for the UE.

[0225] In some embodiments, for a legacy terminal or a terminal that does not support NES, a traditional handover process may be used to enable the UE to leave a cell that activates cell DTX or DRX or a cell switching off cell.

[0226] In some embodiments, during the handover process, if the handover fails, the terminal is triggered to perform cell selection, and after selecting a suitable cell, an RRC connection reestablishment process is initiated.

[0227] In some embodiments, for the CHO scenario, if the handover fails, the terminal is triggered to perform a cell selection process. If the target cell selected is a candidate cell for CHO, the terminal can perform a CHO process to the target cell. If CHO fails again, the cell selection process is performed, and a suitable cell is selected, and a radio resource control (RRC) connection reconstruction process is initiated.

[0228] It should be noted that after a handover fails, the terminal may select the original cell during cell selection, i.e., a cell with activated cell DTX or DRX or a cell switched off, which makes RRC reestablishment meaningless or even fails.

[0229] FIG2a is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2a, the present disclosure embodiment relates to a communication method for a communication system 100, the method comprising:

[0230] Step S2101: The network device sends first information to the terminal.

[0231] In some embodiments, the terminal receives first information sent by the network device.

[0232] In some embodiments, the first information is used to indicate that the terminal is prohibited from selecting the first cell as a target cell for reestablishing a radio resource control (RRC) connection during a cell selection process after a cell handover failure.

[0233] In some embodiments, the first cell includes at least one of the following: an original cell before cell switching; and a cell in a network energy saving NES state.

[0234] In some embodiments, the first information is used to indicate that, in a cell selection process after a cell handover failure, the terminal is prohibited from selecting the original cell before the cell handover as a target cell for reestablishing a radio resource control (RRC) connection.

[0235] In some embodiments, the first information is used to indicate that: in a cell selection process after a cell handover failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell.

[0236] In some embodiments, the first information is used to indicate: triggering NES-based cell switching.

[0237] In some embodiments, the first information is used to indicate: switching configuration parameters of the CHO based on a condition triggered by the NES.

[0238] In some embodiments, the first information is used to indicate that in the cell selection process after the cell handover fails, the terminal is prohibited from selecting the original cell before the cell handover as the target cell for radio resource control RRC connection reestablishment and triggering NES-based cell handover.

[0239] In some embodiments, the first information is used to indicate that during the cell selection process after a cell handover failure, the terminal is prohibited from selecting the original cell before the cell handover as the target cell for reestablishing the radio resource control RRC connection and the configuration parameters of the CHO are switched based on the NES-triggered condition.

[0240] In some embodiments, the first information is used to indicate that, in a cell selection process after a cell handover failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell and triggering an NES-based cell handover.

[0241] In some embodiments, the first information is used to indicate that, in a cell selection process after a cell handover failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell and triggering an NES-based cell handover.

[0242] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection, and in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell.

[0243] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection; in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching.

[0244] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for reestablishing the radio resource control RRC connection, in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell, and the configuration parameters of the conditional switching CHO triggered based on NES.

[0245] In some embodiments, it is determined that cell switching is triggered based on discontinuous transmission (DTX) of the activated cell, and the first information is sent to the terminal.

[0246] In some embodiments, it is determined that cell switching is triggered based on activating discontinuous reception (DRX) of the cell, and the first information is sent to the terminal.

[0247] In some embodiments, it is determined that cell switching is triggered based on cell shutdown, and the first information is sent to the terminal.

[0248] In some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES mode.

[0249] In some embodiments, the NES method includes at least one of the following:

[0250] Activate discontinuous transmission (DTX) in the cell;

[0251] Activate cell discontinuous reception DRX;

[0252] Cell switching off.

[0253] In some embodiments, a switching command message is sent to the terminal; wherein the switching command message includes the first information.

[0254] In some embodiments, the handover command information is an RRC reconfiguration message (RRCReconfiguration message).

[0255] Exemplarily, reconfigurationWithSync includes first information.

[0256] In some embodiments, the original cell is a cell in the NES state.

[0257] In some embodiments, the cell in the NES state includes at least one of the following:

[0258] A cell in DTX mode;

[0259] The cell DTX mode is activated in the cell;

[0260] cells in DRX mode;

[0261] The cell DRX mode is activated.

[0262] In a community where the community is closed.

[0263] In some embodiments, the cell switching is conditional handover (CHO); configuration information of NES CHO is sent to the terminal; wherein the configuration information includes the first information.

[0264] In some embodiments, the network device sends fourth information to the terminal, wherein the fourth information is used to instruct the network device to enter the NES state. In some embodiments, the configuration information is measurement reporting configuration information (eg, ReportConfigNR).

[0265] In some embodiments, the measurement reporting configuration information includes NES event information (eg, nesEvent).

[0266] In some embodiments, second information is sent to a neighboring base station, where the second information indicates an NES mode of a neighboring cell.

[0267] In some embodiments, the second information is sent to the neighboring base station via system broadcast signaling or RRC signaling.

[0268] In some embodiments, third information is sent to the terminal, wherein the third information indicates the NES mode of the serving cell.

[0269] In some embodiments, the third information is sent to the serving cell via system broadcast signaling.

[0270] Step S2102: The terminal determines the target cell.

[0271] In some embodiments, a target cell for RRC connection re-establishment is determined based on the first information.

[0272] In some embodiments, determining the first information is used to indicate: in the cell selection process after the cell switching fails (for example, timer T304 times out), the terminal is prohibited from selecting the original cell before the cell switching as the target cell for wireless resource control RRC connection reconstruction, and in the cell selection process after the cell switching fails, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction.

[0273] In some embodiments, determining the first information is used to indicate: during the cell selection process after a cell switching failure, the terminal is prohibited from selecting a cell in a network energy saving NES state as the target cell, and during the cell selection process after a cell switching failure, the terminal is not selected a cell in an NES state as the target cell.

[0274] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for radio resource control RRC connection reconstruction and triggering NES-based cell switching, and in the cell selection process after the cell switching fails, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction.

[0275] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for wireless resource control RRC connection reconstruction and the configuration parameters of the CHO are switched based on the NES triggered condition; in the cell selection process after the cell switching fails, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction.

[0276] In some embodiments, the first information is used to indicate that: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching, and in the cell selection process after the cell switching fails, the cell in the NES state is not selected as the target cell.

[0277] In some embodiments, the first information is used to indicate that: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching, and in the cell selection process after the cell switching fails, the cell in the NES state is not selected as the target cell.

[0278] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for radio resource control RRC connection reconstruction and in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell, in the cell selection process after the cell switching fails, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction and in the cell selection process after the cell switching fails, the cell in the NES state is not selected as the target cell.

[0279] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching fails, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for radio resource control RRC connection reconstruction, in the cell selection process after the cell switching fails, the terminal is prohibited from selecting a cell in the network energy saving NES state as the target cell and triggering NES-based cell switching, in the cell selection process after the cell switching fails, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction, and in the cell selection process after the cell switching fails, the cell in the NES state is not selected as the target cell.

[0280] In some embodiments, the first information is used to indicate: in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the original cell before the cell switching as the target cell for wireless resource control RRC connection reconstruction, in the cell selection process after the cell switching failure, the terminal is prohibited from selecting the cell in the network energy saving NES state as the target cell and the configuration parameters of the conditional switching CHO triggered by NES, in the cell selection process after the cell switching failure, the original cell before the cell switching is not selected as the target cell for RRC connection reconstruction and in the cell selection process after the cell switching failure, the cell in the NES state is not selected as the target cell.

[0281] In some embodiments, it is determined that NES CHO fails and the value indicated by the first information field corresponding to the NES event information is a first value (for example, indicating True), and the target cell for radio resource control RRC connection reestablishment is determined based on the first information.

[0282] In some embodiments, it is determined that NES CHO fails to be executed, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for CHO triggering is that the condition corresponding to the set NES event information is met, and the target cell for RRC connection reestablishment is determined based on the first information.

[0283] It should be noted that the following embodiments of step S2102 may not be based on step S2101, that is, the following embodiments of step S2102 may not depend on the execution of step S2101.

[0284] In some embodiments, the terminal receives the first information sent by a physical layer of the terminal.

[0285] In some embodiments, the first information indicates that the cell handover is an NES-based handover.

[0286] In some embodiments, the terminal determines that a radio link failure (RLF) or a handover failure (HOF) occurs, and receives the first information sent by the physical layer of the terminal, and determines the target cell for RRC connection reconstruction based on the first information.

[0287] Step S2103: Perform RRC connection reestablishment based on the target cell.

[0288] 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".

[0289] In some embodiments, the term "send" can be interchanged with terms such as "transmit", "report", and "transmit".

[0290] The information indication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, and step S2103 can be implemented as an independent embodiment. For example, step S2101 combined with step S2102 can be implemented as an independent embodiment, and step S2102 combined with step S2103 can be implemented as an independent embodiment, but the present invention is not limited thereto.

[0291] Figure 3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 3a, the embodiment of the present disclosure relates to a communication method, which is executed by a network device. The method includes:

[0292] Step S3101: Sending first information to the terminal;

[0293] The first information is used to indicate at least one of the following:

[0294] The terminal is prohibited from selecting a first cell as a target cell for reestablishing a radio resource control (RRC) connection during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving (NES) state;

[0295] Triggering NES-based cell handover;

[0296] Switches CHO configuration parameters based on NES trigger conditions.

[0297] In some embodiments, optional implementations of step S3101 may refer to step S2102 in FIG. 2 a and other related parts of the embodiment involved in FIG. 2 a , which will not be described in detail here.

[0298] In some embodiments, the sending the first information to the terminal includes:

[0299] Determine to trigger cell switching based on a network energy saving NES mode, and send the first information to the terminal;

[0300] The NES method includes at least one of the following:

[0301] Activate discontinuous transmission (DTX) in the cell;

[0302] Activate cell discontinuous reception DRX;

[0303] The community is closed.

[0304] In some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES method.

[0305] In some embodiments, the sending the first information to the terminal includes:

[0306] Sending switching command information to the terminal;

[0307] The switching command information includes the first information.

[0308] In some embodiments, the handover command information is an RRC reconfiguration message.

[0309] In some embodiments, the original cell is a cell in the NES state.

[0310] In some embodiments, the cell in the NES state includes at least one of the following:

[0311] A cell in DTX mode;

[0312] The cell DTX mode is activated in the cell;

[0313] cells in DRX mode;

[0314] The cell DRX mode is activated.

[0315] In a community where the community is closed.

[0316] In some embodiments, the sending the first information to the terminal includes:

[0317] Sending NES CHO configuration information to the terminal;

[0318] The configuration information includes the first information.

[0319] In some embodiments, the method further comprises:

[0320] Sending fourth information to the terminal, where the fourth information is used to instruct the network device to enter the NES state.

[0321] In some embodiments, the configuration information is measurement reporting configuration information.

[0322] In some embodiments, the measurement reporting configuration information includes NES event information.

[0323] In some embodiments, the method further comprises at least one of the following:

[0324] Sending second information to a neighboring base station, wherein the second information indicates an NES mode of a neighboring cell;

[0325] Sending third information to the terminal, wherein the third information indicates the NES mode of the serving cell.

[0326] Figure 4a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 4a, the embodiment of the present disclosure relates to a communication method, which is executed by a terminal. The method includes:

[0327] Step S4101: Obtain first information.

[0328] In some embodiments, optional implementations of step S4101 may refer to other related parts of the embodiment involved in step S2101 in FIG. 2 a , which will not be described in detail here.

[0329] Step S4102: Determine the target cell.

[0330] In some embodiments, optional implementations of step S4102 can be found in other related parts of the embodiment involved in step S2102 in Figure 2a, and will not be repeated here.

[0331] Step S4103: Perform RRC connection reestablishment based on the target cell.

[0332] In some embodiments, optional implementations of step S4103 may refer to other related parts of the embodiment involved in step S2103 in FIG. 2 a , which will not be described in detail here.

[0333] The information indication method involved in the embodiments of the present disclosure may include at least one of steps S4101 to S4103. For example, step S4101 can be implemented as an independent embodiment, step S4102 can be implemented as an independent embodiment, and step S4103 can be implemented as an independent embodiment. For example, step S4101 combined with step S4102 can be implemented as an independent embodiment, and step S4102 combined with step S4103 can be implemented as an independent embodiment. However, this is not limited to this.

[0334] Figure 4b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 4b, the embodiment of the present disclosure relates to a communication method, which is executed by a terminal, and the method includes:

[0335] Step S4201: Determine a target cell for RRC connection reestablishment based on the first information;

[0336] The first information is used to indicate at least one of the following:

[0337] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0338] Triggering NES-based cell handover;

[0339] Switches CHO configuration parameters based on NES trigger conditions.

[0340] In some embodiments, optional implementations of step S4201 may refer to other related parts of the embodiment involved in step S2102 in FIG. 2 a , which will not be described in detail here.

[0341] In some embodiments, determining the target cell for RRC connection reestablishment based on the first information includes at least one of the following:

[0342] In the cell selection process after the cell handover fails, the original cell before the cell handover is not selected as the target cell for RRC connection reestablishment;

[0343] In the cell selection process after cell handover fails, a cell in the NES state is not selected as the target cell.

[0344] In some embodiments, the method further comprises:

[0345] Receive the first information sent by the network device.

[0346] In some embodiments, the first information is information sent by the network device after determining to trigger cell switching based on a network energy saving (NES) mode; wherein the NES mode includes at least one of the following:

[0347] Activate discontinuous transmission (DTX) in the cell;

[0348] Activate cell discontinuous reception DRX;

[0349] The community is closed.

[0350] In some embodiments, the first information is used to indicate that the cell switching is a switching triggered based on the NES mode.

[0351] In some embodiments, the receiving first information sent by the network device includes:

[0352] receiving switching command information sent by the network device;

[0353] The switching command information includes the first information.

[0354] In some embodiments, the handover command information is an RRC reconfiguration message.

[0355] In some embodiments, the original cell is a cell in the NES state.

[0356] In some embodiments, the cell in the NES state includes at least one of the following:

[0357] A cell in DTX mode;

[0358] The cell DTX mode is activated in the cell;

[0359] cells in DRX mode;

[0360] The cell DRX mode is activated.

[0361] In a community where the community is closed.

[0362] In some embodiments, the receiving the first information sent by the network device includes:

[0363] Receiving NES CHO configuration information sent by the network device;

[0364] The configuration information includes the first information.

[0365] In some embodiments, the method further comprises:

[0366] Receive fourth information sent by the network device, where the fourth information is used to instruct the network device to enter the NES state.

[0367] In some embodiments, the configuration information is measurement reporting configuration information.

[0368] In some embodiments, the measurement reporting configuration information includes NES event information.

[0369] In some embodiments, determining a target cell for radio resource control (RRC) connection reestablishment based on the first information includes:

[0370] It is determined that NES CHO fails and a value indicated by a first information field corresponding to the NES event information is a first value, and the target cell for radio resource control RRC connection reestablishment is determined based on the first information.

[0371] In some embodiments, determining that NES CHO fails and a value indicated by a first information field corresponding to the NES event information is a first value, and determining the target cell for radio resource control RRC connection reestablishment based on the first information includes:

[0372] Determine that NES CHO fails, the value indicated by the first information field corresponding to the NES event information is a first value, and the reason for CHO triggering is that the condition corresponding to the set NES event information is met, and determine the target cell for RRC connection reestablishment based on the first information.

[0373] In some embodiments, the method further comprises:

[0374] Receive the first information sent by the physical layer of the terminal.

[0375] In some embodiments, determining a target cell for radio resource control (RRC) connection reestablishment based on the first information includes:

[0376] determining that a radio link failure (RLF) or a handover failure (HOF) occurs and receiving the first information, and determining the target cell for RRC connection reestablishment based on the first information;

[0377] The first information indicates that the cell switching is NES-based switching.

[0378] In some embodiments, the method further comprises:

[0379] Receive third information sent by the network device, wherein the third information indicates the NES mode of the serving cell.

[0380] Figure 5a is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 5a, the present disclosure embodiment relates to a communication method, which is used in a communication system 100. The method includes one of the following steps:

[0381] Step S5101: The network device sends first information to the terminal;

[0382] The first information is used to indicate at least one of the following:

[0383] The terminal is prohibited from selecting a first cell as a target cell for RRC connection reestablishment during a cell selection process after a cell handover failure; the first cell includes at least one of the following: an original cell before the cell handover; a cell in a network energy saving NES state;

[0384] Triggering NES-based cell handover;

[0385] Switches CHO configuration parameters based on NES trigger conditions.

[0386] The optional implementation of step S5101 can refer to the optional implementation of steps S2101 to S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0387] In some embodiments, the above method may include the methods of the above-mentioned communication system side, network equipment, terminal, etc. embodiments, which will not be repeated here.

[0388] In order to better understand the embodiments of the present disclosure, some exemplary embodiments are further described below:

[0389] Example 1 provides a handover solution:

[0390] In some embodiments, if the network side triggers switching based on activating cell DTX / DRX or cell switching off, the switching command, that is, the RRCReconfiguration message carries an indication (corresponding to the first information), which is used to indicate that the switching is based on NES, that is, cell DTX / DRX or cell switching off.

[0391] In some embodiments, the indication can be configured in reconfigurationWithSync. If the indication is configured, if a handover failure occurs (i.e., T304 times out), the terminal does not select the original cell as the target cell for RRC connection reestablishment during cell selection. Alternatively, the terminal does not select a cell in the NES state as the target cell for RRC connection reestablishment. The NES state refers to a cell in cell DTX, a cell in cell DRX activation, and / or a cell in cell switching off.

[0392] Example 1 provides a solution for Network Energy Saving Conditional Handover (NES CHO):

[0393] In some embodiments, if NES CHO fails to execute, that is, T304 times out, and the configuration of the NES CHO (for example, the associated measurement reporting configuration), that is, ReportConfigNR includes a nesEvent indication and is set to true, then after the NES CHO fails to execute, the terminal does not select the original cell as the target cell for RRC connection reestablishment in cell selection. Or, the terminal does not select a cell in the NES state as the target cell for RRC connection reestablishment, and the cell in the NES state refers to a cell DTX, a cell DRX activated cell, and / or a cell switching off cell.

[0394] That is, conditional switching needs to consider NES event information and traditional events that trigger switching (ie, 1CHO=1nesEVent+1egacy event).

[0395] In some embodiments, if NES CHO execution fails, that is, T304 times out, and the configuration of the NES CHO, the associated measurement reporting configuration, that is, ReportConfigNR contains a nesEvent indication and is set to true, and this CHO is triggered because the condition for setting nesEvent is met. After the NES CHO execution fails, the terminal does not select the original cell as the target cell for RRC connection reestablishment in cell selection. Alternatively, the terminal does not select a cell in the NES state as the target cell for RRC connection reestablishment, and the cell in the NES state refers to a cell with cell DTX, cell DRX activated, and / or a cell switched off.

[0396] In some embodiments, if RLF or HOF occurs and an NES mode indication (NES mode indication, which may be the first information) is received from the bottom layer (e.g., the physical layer), the terminal does not select the original cell as the target cell for RRC connection reestablishment in cell selection. Alternatively, the terminal does not select a cell in the NES state as the target cell for RRC connection reestablishment, where the cell in the NES state refers to a cell DTX, a cell DRX activated cell, and / or a cell switching off cell.

[0397] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations in other embodiments.

[0398] The embodiments of the present disclosure further 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, a core network function node, a core network device, etc.) in any of the above methods.

[0399] It should be understood that the division of the various units or modules in the above device 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 device, 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.

[0400] In the embodiments of the present disclosure, the 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 the 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 and implementing 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.

[0401] Figure 6a is a schematic diagram of the structure of a network device 6100 proposed in an embodiment of the present disclosure. As shown in Figure 6a, the network device 6100 may include at least one of a transceiver module 6101 and a processing module 6102. In some embodiments, the transceiver module is used to send and receive information. Optionally, the transceiver module is used to perform at least one of the communication steps, such as sending and / or receiving, performed by the network device 6100 in any of the above methods, which are not further described here. Optionally, the processing module is used to perform at least one of the other steps performed by the network device in any of the above methods, which are not further described here.

[0402] Figure 6b is a schematic diagram of the structure of the terminal proposed in an embodiment of the present disclosure. As shown in Figure 6b, the terminal 6200 may include: at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the above-mentioned transceiver module is used to send and receive information. Optionally, the above-mentioned transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal in any of the above methods, which will not be repeated here. In some embodiments, the transceiver module may include a sending module and / or a receiving module, and the sending module and the receiving module may be separate or integrated together. Optionally, the transceiver module can be interchangeable with the transceiver.

[0403] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0404] Figure 7a is a schematic diagram of the structure of a communication device 9100 proposed in an embodiment of the present disclosure. Communication device 9100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 9100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0405] As shown in Figure 7a, the communication device 9100 includes one or more processors 9101. The processor 9101 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, baseband chip, terminal device, terminal device chip, DU or CU, etc.), execute programs, and process program data. The communication device 9100 is used to perform any of the above methods.

[0406] In some embodiments, the communication device 9100 further includes one or more memories 9102 for storing instructions. Optionally, all or part of the memories 9102 may be located outside the communication device 9100.

[0407] In some embodiments, the communication device 9100 further includes one or more transceivers 9103. When the communication device 9100 includes one or more transceivers 9103, the transceiver 9103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101 and step S3101, but not limited thereto), and the processor 9101 performs at least one of the other steps.

[0408] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0409] In some embodiments, the communication device 9100 may include one or more interface circuits 9104. Optionally, the interface circuit 9104 is connected to the memory 9102. The interface circuit 9104 may be configured to receive signals from the memory 9102 or other devices, and may be configured to send signals to the memory 9102 or other devices. For example, the interface circuit 9104 may read instructions stored in the memory 9102 and send the instructions to the processor 9101.

[0410] The communication device 9100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 9100 described in the present disclosure is not limited thereto, and the structure of the communication device 9100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0411] FIG7 b is a schematic diagram of the structure of the chip 9200 proposed in an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 9200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0412] The chip 9200 includes one or more processors 9201 , and the chip 9200 is configured to execute any of the above methods.

[0413] In some embodiments, the chip 9200 further includes one or more interface circuits 9202. Optionally, the interface circuit 9202 is connected to the memory 9203. The interface circuit 9202 can be used to receive signals from the memory 9203 or other devices, and can be used to send signals to the memory 9203 or other devices. For example, the interface circuit 9202 can read instructions stored in the memory 9203 and send the instructions to the processor 9201.

[0414] In some embodiments, the interface circuit 9202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, step S3101, but not limited thereto), and the processor 9201 executes at least one of the other steps.

[0415] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0416] In some embodiments, the chip 9200 further includes one or more memories 9203 for storing instructions. Alternatively, all or part of the memories 9203 may be located outside the chip 9200.

[0417] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 9100, causes the communication device 9100 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 is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0418] The present disclosure also provides a program product, which, when executed by the communication device 9100, enables the communication device 9100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0419] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A communication method, characterized in that, the method is executed by a network device, and the method includes: sending first information to a terminal; wherein, the first information is used to indicate at least one of the following: prohibiting the terminal from selecting a first cell as the target cell for radio resource control (RRC) connection reestablishment during the cell selection process after a cell handover fails; the first cell includes at least one of the following: the original cell before the cell handover; a cell in the network energy saving (NES) state; triggering a cell handover based on NES; configuration parameters of a conditional handover (CHO) triggered based on NES.

2. The method according to claim 1, characterized in that, the sending of the first information to the terminal includes: determining that a cell handover is triggered in the NES manner, and sending the first information to the terminal; wherein, the NES manner includes at least one of the following: activating discontinuous transmission (DTX) of a cell; activating discontinuous reception (DRX) of a cell; cell shutdown.

3. The method according to claim 1, characterized in that, the sending of the first information to the terminal includes: sending handover command information to the terminal; wherein, the handover command information includes the first information.

4. The method according to claim 3, characterized in that, the handover command information is an RRC reconfiguration message.

5. The method according to claim 1, characterized in that, the original cell is a cell in the NES state.

6. The method according to claim 1, characterized in that, the cell in the NES state includes at least one of the following: a cell in the DTX mode; a cell with the DTX mode of the cell being activated; a cell in the DRX mode; a cell with the DRX mode of the cell being activated; a cell in the cell shutdown state.

7. The method according to claim 1, characterized in that, the sending of the first information to the terminal includes: sending configuration information of NES CHO to the terminal; wherein, the configuration information includes the first information.

8. The method according to claim 7, characterized in that, the configuration information is measurement reporting configuration information.

9. The method according to claim 8, characterized in that, the measurement reporting configuration information includes NES event information.

10. The method according to any one of claims 1 to 9, characterized in that, the method further includes at least one of the following: sending second information to a neighboring base station, wherein the second information indicates the NES manner of a neighboring cell; sending third information to the terminal, wherein the third information indicates the NES manner of a serving cell.

11. The method according to claim 7, characterized in that, the method further includes: sending fourth information to the terminal, and the fourth information is used to indicate that the network device enters the NES state.

12. A communication method, characterized in that, the method is executed by a terminal, and the method includes: determining a target cell for RRC connection reestablishment based on first information; wherein, the first information is used to indicate at least one of the following: During the cell selection process after a cell handover fails, the terminal is prohibited from selecting a first cell as the target cell for RRC connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in the network energy saving (NES) state; Trigger a cell handover based on NES; Configuration parameters of a conditional handover (CHO) triggered based on NES.

13. The method according to claim 12, wherein, Determining the target cell for RRC connection reestablishment based on the first information includes at least one of the following: During the cell selection process after a cell handover fails, the original cell before the cell handover is not selected as the target cell for RRC connection reestablishment; During the cell selection process after a cell handover fails, a cell in the NES state is not selected as the target cell.

14. The method according to claim 12, wherein, The method further includes: Receiving the first information sent by a network device.

15. The method according to claim 14, wherein, The first information is information sent by the network device after determining to trigger a cell handover in the network energy saving (NES) mode; wherein, the NES mode includes at least one of the following: Activating discontinuous transmission (DTX) of a cell; Activating discontinuous reception (DRX) of a cell; Cell shutdown.

16. The method according to claim 14, wherein, Receiving the first information sent by the network device includes: Receiving handover command information sent by the network device; wherein, the handover command information includes the first information.

17. The method according to claim 16, wherein, The handover command information is an RRC reconfiguration message.

18. The method according to claim 12, wherein, The original cell is a cell in the NES state.

19. The method according to claim 12, wherein, The cells in the NES state include at least one of the following: Cells in the DTX mode; Cells with the DTX mode of the cell being in an active state; Cells in the DRX mode; Cells with the DRX mode of the cell being in an active state; Cells in the cell shutdown state.

20. The method according to claim 12, wherein, Receiving the first information sent by the network device includes: Receiving NES CHO configuration information sent by the network device; wherein, the configuration information contains the first information.

21. The method according to claim 20, wherein, The method further includes: Receiving fourth information sent by the network device, the fourth information being used to indicate that the network device enters the NES state.

22. The method according to claim 20, wherein, The configuration information is measurement reporting configuration information.

23. The method according to claim 22, wherein, The measurement reporting configuration information contains NES event information.

24. The method according to claim 23, wherein, Determining the target cell for radio resource control (RRC) connection reestablishment based on the first information includes: Determine that the execution of NES CHO fails and the value indicated by the first information field corresponding to the NES event information is the first value, and determine the target cell for radio resource control (RRC) connection reestablishment based on the first information.

25. The method according to claim 24, wherein, the determining that the execution of NES CHO fails and the value indicated by the first information field corresponding to the NES event information is the first value, and determining the target cell for radio resource control (RRC) connection reestablishment based on the first information includes: Determine that the execution of NES CHO fails, the value indicated by the first information field corresponding to the NES event information is the first value, and the reason for CHO triggering is that the conditions corresponding to the set NES event information are satisfied, and determine the target cell for RRC connection reestablishment based on the first information.

26. The method according to claim 12, wherein, the method further includes: Receiving the first information sent by the physical layer of the terminal.

27. The method according to claim 26, wherein, the determining the target cell for radio resource control (RRC) connection reestablishment based on the first information includes: Determine that a radio link failure (RLF) or a handover failure (HOF) occurs and the first information is received, and determine the target cell for RRC connection reestablishment based on the first information; wherein, the first information indicates that the cell handover is NES-based handover.

28. The method according to claim 12, wherein, the method further includes: Receiving third information sent by a network device, where the third information indicates the NES mode of a serving cell.

29. A communication method, wherein, the method includes: A network device sends first information to a terminal; wherein, the first information is used to indicate at least one of the following: Prohibit the terminal from selecting a first cell as the target cell for radio resource control (RRC) connection reestablishment during the cell selection process after a cell handover failure; the first cell includes at least one of the following: the original cell before the cell handover; a cell in the network energy saving (NES) state; Trigger NES-based cell handover; Configuration parameters of a conditional handover (CHO) triggered based on NES.

30. A network device, wherein, the network device includes: A transceiver module, configured to: Send first information to a terminal; wherein, the first information is used to indicate at least one of the following: Prohibit the terminal from selecting a first cell as the target cell for radio resource control (RRC) connection reestablishment during the cell selection process after a cell handover failure; the first cell includes at least one of the following: the original cell before the cell handover; a cell in the network energy saving (NES) state; Trigger NES-based cell handover; Configuration parameters of a conditional handover (CHO) triggered based on NES.

31. A terminal, wherein, the terminal includes: A processing module, configured to: Determine the target cell for RRC connection reestablishment based on the first information; wherein, the first information is used to indicate at least one of the following: During the cell selection process after a cell handover fails, the terminal is prohibited from selecting a first cell as the target cell for radio resource control (RRC) connection reestablishment; the first cell includes at least one of the following: the original cell before the cell handover; a cell in the network energy saving (NES) state; Trigger a cell handover based on NES; Configuration parameters of conditional handover (CHO) triggered based on NES.

32. A communication system, Characterized in that, The communication system includes a network device and a terminal; the network device is configured to implement the method according to any one of claims 1 to 11, and the terminal is configured to implement the method according to any one of claims 12 to 28.

33. A network device, Characterized in that, The network device includes: One or more processors; Wherein, the network device is used to execute the method according to any one of claims 1 to 11.

34. A terminal, Characterized in that, The terminal includes: One or more processors; Wherein, the terminal is used to execute the method according to any one of claims 12 to 28.

35. A storage medium, Characterized in that, The storage medium stores instructions that, when run on a communication device, cause the communication device to execute the method according to any one of claims 1 to 11 and claims 12 to 28.

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