CN117813908A

CN117813908A - Communication method, terminal, network equipment and communication system

Info

Publication number: CN117813908A
Application number: CN202380012196.3A
Authority: CN
Inventors: 江小威; 李小龙
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-11-10
Filing date: 2023-11-10
Publication date: 2024-04-02

Abstract

The disclosure provides a communication method, a terminal, network equipment and a communication system, and relates to the technical field of communication. The method comprises the following steps: the terminal receives first information sent by network equipment; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information. By applying the technical scheme, after the stop service time of the service cell where the terminal is located arrives, whether the terminal initiates connection reestablishment can be accurately controlled based on network configuration, so that the success rate of connection reestablishment is improved, the connection reestablishment process for the NTN is further enhanced, and the success rate of the terminal accessing the NTN is further improved.

Description

Communication method, terminal, network equipment and communication system

Technical Field

The disclosure relates to the field of communication technologies, and in particular, to a communication method, a terminal, a network device, and a communication system.

Background

Unlike a terrestrial/Non-terrestrial network (Non-terrestrial Network, NTN), an access network device of the NTN network may be inferior to a TN network in terms of coverage performance due to a long distance between the access network device and the terminal of the NTN network, compared to the TN network, thereby causing the terminal to be unable to access the NTN network.

Disclosure of Invention

The disclosure provides a communication method, a terminal, network equipment and a communication system. The success rate of connection reestablishment can be improved, and the connection reestablishment process aiming at the NTN network is further enhanced, so that the success rate of the terminal accessing the NTN network is improved.

An embodiment of a first aspect of the present disclosure provides a communication method, performed by a terminal, the method including: receiving first information; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

A second aspect embodiment of the present disclosure provides a communication method performed by a network device, the method comprising: transmitting first information; the first information is used for determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives.

An embodiment of a third aspect of the present disclosure provides a terminal, including: a first transceiver module configured to receive first information; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

A fourth aspect embodiment of the present disclosure provides a network device, including: a second transceiver module configured to transmit the first information; the first information is used for determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives.

A fifth aspect of the present disclosure provides a terminal, including: one or more processors; the terminal is configured to perform the method described in the embodiment of the first aspect.

A sixth aspect of the present disclosure provides a network device, comprising: one or more processors; wherein the network device is configured to perform the method according to the embodiment of the second aspect.

A seventh aspect of the present disclosure provides a communication system comprising: a terminal and a network device; the terminal performs the method according to the embodiment of the first aspect, and the network device performs the method according to the embodiment of the second aspect.

An eighth aspect embodiment of the present disclosure provides a communication method, including: the network equipment sends first information to the terminal; and the terminal receives the first information sent by the network equipment, and determines whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

A ninth aspect embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions; the computer-executable instructions, when executed by the processor, enable the implementation of the method as described in the first aspect embodiment or as described in the second aspect embodiment.

The embodiment of the disclosure provides a communication method, a terminal, a network device and a communication system, which can accurately control whether a terminal initiates connection reestablishment based on network configuration after the stop service time of a service cell where the terminal is located arrives, so as to improve the success rate of connection reestablishment, further enhance the connection reestablishment process for an NTN network, and further improve the success rate of the terminal accessing the NTN network.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of an example of a transparent mode according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an example of a regeneration mode according to an embodiment of the present disclosure;

fig. 3 is a schematic architecture diagram of a communication system according to an embodiment of the present disclosure;

FIG. 4 is a flow chart of a communication method according to an embodiment of the disclosure;

FIG. 5 is a flow chart of a communication method according to an embodiment of the disclosure;

FIG. 6 is a flow chart of a communication method according to an embodiment of the disclosure;

FIG. 7 is a flow chart of a communication method according to an embodiment of the disclosure;

fig. 8 is a block diagram of a communication processing apparatus according to an embodiment of the present disclosure;

fig. 9 is a block diagram of a communication processing apparatus according to an embodiment of the present disclosure;

fig. 10 is a schematic structural view of a communication device according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a chip according to an embodiment of the disclosure.

Detailed Description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

For ease of understanding, the terms involved in the embodiments of the present disclosure are first introduced.

1. Non-terrestrial/ground communications (Non-terrestrial Network, NTN)

NTN is an important technology introduced by 5G, which provides radio resources through network devices such as satellites or drones, rather than ground base stations. The transmission mode and the reproduction mode can be classified according to the manner in which the satellite processes the signal. Transparent transmission mode as shown in fig. 1, the NTN ground station transmits signals of a network device (gNB) to a satellite, and the satellite converts the signals to a satellite frequency band and transmits the signals to a terminal (UE) through the satellite frequency band, except for frequency conversion and signal amplification, the satellite does not demodulate the gNB signals, similar to a repeater (repeater). Regeneration mode as shown in fig. 2, after the NTN ground station transmits the signal of the gNB to the satellite, the satellite demodulates and decodes the signal, then re-encodes and modulates (this process is regeneration) the signal, and transmits the regenerated signal through the satellite frequency band.

Table 1 below gives the satellite heights, orbits, satellite coverage of a typical NTN network:

TABLE 1

2. Earth fixed (earth-fixed) cell

For earth moving (earth-moving) cells, their area of ground coverage will change over time, whereas for earth-fixed cells, compared to earth-moving cells, they will not.

3. Time to Service (t-Service)

For an earth-fixed serving cell, it will broadcast t-Service in SIB3 message for indicating when the serving cell stops serving its currently covered area.

4. Service start time (t-ServiceStart)

For the earth-fixed serving cell, t-ServiceStart is introduced to indicate the start service time of its neighbor cell, and can be used for the terminal device to determine when to start measurement of neighbor cell, such as by measuring reference signal received power (Reference Signal Receiving Power, RSRP) and signal-to-noise ratio (Signal to Noise Ratio, SNR), determining signal received quality, etc.

5. T311 timer (may be simply referred to as T311)

The T311 timer is a connection re-establishment related timer, and the T310 timer (may be simply referred to as T310) is a radio link monitoring (Radio Link Monitoring, RLM) related timer. The physical layer indicates out-of-sync or in-sync to the radio link control (Radio Resource Control, RRC) layer if an out-of-sync or in-sync state is detected while RLM is performed. If the terminal continuously receives N310 out-of-sync indications indicated by the physical layer in the RRC layer, the terminal starts a T310 timer, after the timer T310 expires, a radio link failure is triggered (RadioLinkFailure, RLF), a T311 timer is started, and connection reestablishment is initiated. T310 is stopped when N311 in-syncs are received during the operation of T310. If the reconstruction is successful, T311 is stopped. If T311 is overtime, the connection reestablishment failure is indicated, and the terminal leaves the connection state. For example, T311 may be configured to be up to 30 seconds in duration, etc.

6. T317 timer (may be simply referred to as T317)

The T317 timer is a timer for the terminal to determine whether SIB31 or SIB31-NB is valid, the terminal starts the T317 timer after acquiring SIB31 or SIB31-NB, if the T317 timer expires, the terminal considers that the acquired SIB31 or SIB31-NB fails, the terminal retries acquiring SIB31 or SIB31-NB, and starts a T318 timer (may be simply referred to as T318). After starting the timer T318, if the SIB31 or the SIB31-NB is acquired, the terminal stops the T318 timer, namely ends the T318 timer; if the SIB31 or SIB31-NB is not obtained after the timeout of T318, the terminal considers that a link problem occurs, thereby triggering a Radio link failure (Radio LinkFailure, RLF), initiating a Radio link reestablishment, and further entering a long term evolution (Long Term Evolution, LTE) transceiving process.

The embodiment of the disclosure provides a communication method, a terminal, network equipment and a communication system.

In a first aspect, an embodiment of the present disclosure proposes a communication method, performed by a terminal, the method including: receiving first information; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

In the above embodiment, the network device may send the first information to the terminal, and after the service stopping time of the serving cell where the terminal is located arrives, the network device may accurately control whether the terminal initiates connection reestablishment based on the network configuration, so as to improve the success rate of connection reestablishment, further enhance the connection reestablishment process for the NTN network, and thereby improve the success rate of accessing the terminal to the NTN network.

With reference to some embodiments of the first aspect, the first information may include: configuration information allowing the terminal to initiate connection re-establishment. And the terminal can determine whether to initiate connection reestablishment according to the configuration information after the service stopping time of the service cell of the terminal arrives, so as to improve the success rate of connection reestablishment.

With reference to some embodiments of the first aspect, the configuration information allowing the terminal to initiate connection re-establishment includes at least one of:

a time threshold for allowing the terminal to initiate a service initiation time of a connection reestablished neighbor cell; an enabling configuration allowing the terminal to initiate connection re-establishment to at least one neighbor cell; at least one neighbor cell allowing the terminal to initiate connection re-establishment.

The embodiment can accurately control whether the terminal initiates connection reestablishment according to the configuration information so as to improve the success rate of connection reestablishment.

With reference to some embodiments of the first aspect, if the configuration information allowing the terminal to initiate connection reestablishment includes the enabling configuration and does not include at least one neighboring cell allowing the terminal to initiate connection reestablishment, determining, according to the first information, that a service stopping time of a serving cell in which the terminal is located arrives, and executing one of the following:

Selecting the earliest service starting time from the service starting times of all neighbor cells of the terminal to start connection reestablishment; and starting connection reestablishment at the service start time of one neighbor cell selected by the terminal from all neighbor cells.

In this way, if the network configuration enables fast connection reestablishment and the terminal has multiple neighbor cells, it can be made clear at which neighbor cell service start time the terminal initiates connection reestablishment.

With reference to some embodiments of the first aspect, if the configuration information allowing the terminal to initiate connection reestablishment includes at least one neighboring cell allowing the terminal to initiate connection reestablishment, determining, according to the first information, that a service stopping time of a serving cell in which the terminal is located arrives, and executing one of the following:

starting connection reestablishment according to the service start time of a neighbor cell allowing the terminal to initiate connection reestablishment; selecting the earliest service start time from the service start times of a plurality of adjacent cells allowing the terminal to initiate connection reestablishment; starting connection reestablishment at a service initiation time of one neighbor cell selected by the terminal from the plurality of neighbor cells; and determining that the terminal immediately starts connection reestablishment.

In this way, if the network configuration enables the fast connection reestablishment and indicates at least one neighbor cell from which the terminal can initiate the connection reestablishment, it can be determined with which neighbor cell the terminal initiates the connection reestablishment at the service start time, so as to improve the success rate of connection reestablishment, further enhance the connection reestablishment process for the NTN network, and thereby improve the success rate of the terminal accessing the NTN network.

With reference to some embodiments of the first aspect, if it is determined that the terminal immediately initiates connection reestablishment, the method further includes: and determining the starting time of a cell selection flow in connection reestablishment according to the service starting time of at least one adjacent cell allowing the terminal to initiate connection reestablishment.

Further, the determining, according to a service start time of at least one neighboring cell that allows the terminal to initiate connection reestablishment, a starting time of a cell selection procedure in connection reestablishment includes one of the following:

starting a cell selection process according to the service start time of a neighbor cell allowing the terminal to initiate connection reestablishment; selecting the earliest service start time from the service start times of a plurality of adjacent cells allowing the terminal to initiate connection reestablishment, and starting a cell selection flow; and starting a cell selection process at the service start time of one neighbor cell selected from the neighbor cells by the terminal.

According to the scheme of the embodiment, if the terminal immediately starts connection reestablishment, the cell selection flow in connection reestablishment can be delayed by the mode because the service starting time of the adjacent cell is not yet reached, so that the success rate of connection reestablishment is improved.

With reference to some embodiments of the first aspect, the time threshold includes at least one of:

an absolute time threshold of the service start time; and a relative time threshold of a time difference value, wherein the time difference value is a time difference value between the service start time and the service stop time.

With reference to some embodiments of the first aspect, if the configuration information includes the time threshold, determining, according to the first information, that a service stopping time of a serving cell in which the terminal is located arrives, and executing one of the following steps:

selecting the earliest service start time from the service start time of the neighbor cells meeting the time threshold requirement to start connection reestablishment; starting connection reestablishment at the service start time of one neighbor cell selected by the terminal from neighbor cells meeting the time threshold requirement; and determining that the terminal immediately starts connection reestablishment.

In this way, if the network configures the time threshold to control the quick connection reestablishment of the terminal, and when the terminal has a plurality of neighbor cells, it can be clear which neighbor cell service start time the terminal starts connection reestablishment, so as to improve the success rate of connection reestablishment, further enhance the connection reestablishment process for the NTN network, and further improve the success rate of accessing the terminal into the NTN network.

With reference to some embodiments of the first aspect, if it is determined that the terminal immediately starts connection reestablishment, the method of this embodiment further includes: and determining the starting time of the cell selection flow in connection reestablishment according to the service starting time of at least one adjacent cell meeting the time threshold requirement.

Further, the determining, according to the service start time of at least one neighboring cell satisfying the time threshold requirement, a starting time of a cell selection procedure in connection reestablishment includes one of the following:

starting a cell selection process according to the service start time of one neighbor cell meeting the time threshold requirement; selecting the earliest service start time from the service start times of a plurality of adjacent cells meeting the time threshold requirement to start a cell selection process; and starting a cell selection process at the service start time of one neighbor cell selected from the neighbor cells by the terminal.

In some embodiments, the neighbor cells meeting the time threshold requirement include at least one of:

neighbor cells with service start times less than or equal to the absolute time threshold; and the time difference between the service start time and the service stop time is smaller than or equal to the adjacent cell of the relative time threshold.

Further, in some embodiments, if the terminal immediately initiates connection reestablishment, the method further comprises: and determining the starting time of the T311 timer according to the starting time of the cell selection flow so as to improve the success rate of connection reestablishment.

With reference to some embodiments of the first aspect, the method of this embodiment may further include: determining that the terminal suspends an Access Stratum (AS) operation in a first time period; wherein the first time period is a time period between an arrival time of the out-of-service time and a time of initiating connection reestablishment.

In some embodiments, the suspending AS operation includes at least one of:

a radio link monitoring (Radio Link Monitoring, RLM) related timer; a data inactivity timer (datainactivity timer); conditional switch (Conditional Handover, CHO) execution; neighbor cell measurements (neighbour cell measurement); random access; scheduling requests (Scheduling Request, SR); buffer status report (Buffer Status Report, BSR).

If the terminal delays to the service start time to reestablish the connection, the technical scheme of the embodiment determines the terminal behavior from the service cell service stop time to the reestablishment time so as to improve the success rate of connection reestablishment, further enhance the connection reestablishment process aiming at the NTN network and improve the success rate of the terminal accessing the NTN network.

Further, in some embodiments, the method of this embodiment further includes: it is determined that the T317 timer is running for a first period of time.

Further, in some embodiments, the method of this embodiment further includes: it is determined that the T318 timer is stopped for a first period of time.

By the method, the success rate of connection reconstruction can be improved.

In a second aspect, embodiments of the present disclosure propose a communication method performed by a network device, the method comprising: transmitting first information; the first information is used for determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives.

With reference to some embodiments of the second aspect, the first information includes: configuration information allowing the terminal to initiate connection reestablishment.

With reference to some embodiments of the second aspect, the configuration information includes at least one of:

A time threshold for allowing the terminal to initiate a service initiation time of a connection reestablished neighbor cell; at least one neighbor cell allowing the terminal to initiate connection reestablishment; and enabling configuration for allowing the terminal to initiate connection reestablishment to at least one adjacent cell.

With reference to some embodiments of the second aspect, if the configuration information includes the enabling configuration and does not include at least one neighboring cell that allows the terminal to initiate connection reestablishment, the configuration information is used to determine that a service stopping time of a serving cell in which the terminal is located has arrived, and then one of the following is performed:

With reference to some embodiments of the second aspect, if the configuration information includes at least one neighboring cell that allows the terminal to initiate connection reestablishment, the configuration information is used to determine that a service stopping time of a serving cell in which the terminal is located has arrived, and then one of the following is performed:

With reference to some embodiments of the second aspect, the time threshold includes at least one of:

With reference to some embodiments of the second aspect, if the configuration information includes the time threshold, the configuration information is used to determine that a service stopping time of a serving cell in which the terminal is located arrives, and then one of the following is executed:

With reference to some embodiments of the second aspect, the neighbor cells that meet the time threshold requirement include at least one of:

In a third aspect, an embodiment of the present disclosure proposes a terminal, including: a first transceiver module configured to receive first information; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

In a fourth aspect, an embodiment of the present disclosure proposes a network device, including: a second transceiver module configured to transmit the first information; the first information is used for determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives.

In a fifth aspect, an embodiment of the present disclosure proposes a communication device, specifically a terminal or a network device, including: one or more processors; wherein the terminal is configured to perform the method according to the embodiment of the first aspect, and the network device is configured to perform the method according to the embodiment of the second aspect.

In a sixth aspect, an embodiment of the present disclosure proposes a communication system including: a terminal and a network device; the terminal performs the method according to the embodiment of the first aspect, and the network device performs the method according to the embodiment of the second aspect.

In a seventh aspect, an embodiment of the present disclosure provides a communication method, including: the network equipment sends first information to the terminal; and the terminal receives the first information sent by the network equipment, and determines whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

In an eighth aspect, embodiments of the present disclosure provide a computer storage medium, where the computer storage medium stores computer-executable instructions; the computer-executable instructions, when executed by the processor, enable the implementation of the method as described in the first aspect embodiment or as described in the second aspect embodiment.

In a ninth aspect, embodiments of the present disclosure propose a program product which, when executed by a communication device, causes the communication device to perform a method as in the first aspect embodiment or as in the second aspect embodiment.

In a tenth aspect, the presently disclosed embodiments propose a computer program which, when run on a computer, causes the computer to perform the method as described in the first aspect embodiment or in the second aspect embodiment.

In an eleventh aspect, embodiments of the present disclosure provide a chip or chip system. The chip or chip system comprises a processing circuit configured to perform a method according to an embodiment of the first aspect or as an embodiment of the second aspect described above.

It will be appreciated that the above-described terminal, network device, communication system, storage medium are all configured to perform the methods set forth in the embodiments of the present disclosure. Therefore, the advantages achieved by the method can be referred to as the advantages of the corresponding method, and will not be described herein.

The embodiment of the disclosure provides a communication method, a terminal, network equipment and a communication system. In some embodiments, terms of a communication method and an information processing method, an information transmitting method, an information receiving method, and the like may be replaced with each other, terms of a communication apparatus and an information processing apparatus, an information transmitting apparatus, an information receiving apparatus, and the like may be replaced with each other, and terms of an information processing system, a communication system, an information transmitting system, an information receiving system, and the like may be replaced with each other.

The embodiments of the present disclosure are not intended to be exhaustive, but rather are exemplary of some embodiments and are not intended to limit the scope of the disclosure. In the case of no contradiction, each step in a certain embodiment may be implemented as an independent embodiment, and the steps may be arbitrarily combined, for example, a scheme in which part of the steps are removed in a certain embodiment may also be implemented as an independent embodiment, the order of the steps in a certain embodiment may be arbitrarily exchanged, and further, alternative implementations in a certain embodiment may be arbitrarily combined; furthermore, various embodiments may be arbitrarily combined, for example, some or all steps of different embodiments may be arbitrarily combined, and an embodiment may be arbitrarily combined with alternative implementations of other embodiments.

In the various embodiments of the disclosure, terms and/or descriptions of the various embodiments are consistent throughout the various embodiments and may be referenced to each other in the absence of any particular explanation or logic conflict, and features from different embodiments may be combined to form new embodiments in accordance with their inherent logic relationships.

The terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.

In the presently disclosed embodiments, elements that are referred to in the singular, such as "a," "an," "the," "said," etc., may mean "one and only one," or "one or more," "at least one," etc., unless otherwise indicated. For example, where an article (article) is used in translation, such as "a," "an," "the," etc., in english, a noun following the article may be understood as a singular expression or as a plural expression.

In the presently disclosed embodiments, "plurality" refers to two or more.

In some embodiments, terms such as "at least one of", "one or more of", "multiple of" and the like may be substituted for each other.

Description modes such as at least one of A, B, C … …, A and/or B and/or C … … include any single case of A, B, C … … and any combination case of any plurality of A, B, C … …, and each case may exist independently; for example, "at least one of A, B, C" includes the cases of a alone, B alone, C, A and B in combination, a and C in combination, B and C in combination, a and B and C in combination; for example, a and/or B includes the case of a alone, a combination of a alone B, A and B.

In some embodiments, "in a case a, in another case B", "in response to a case a", "in response to another case B", and the like, the following technical solutions may be included according to the circumstances: a is performed independently of B, i.e., a in some embodiments; b is performed independently of a, i.e., in some embodiments B; a and B are selectively performed, i.e., in some embodiments selected from a and B; both a and B are performed, i.e., a and B in some embodiments. Similar to that described above when there are more branches such as A, B, C.

The prefix words "first", "second", etc. in the embodiments of the present disclosure are only for distinguishing different description objects, and do not limit the location, order, priority, number, content, etc. of the description objects, and the statement of the description object refers to the claims or the description of the embodiment context, and should not constitute unnecessary limitations due to the use of the prefix words. For example, if the description object is a "field", the ordinal words before the "field" in the "first field" and the "second field" do not limit the position or the order between the "fields", and the "first" and the "second" do not limit whether the "fields" modified by the "first" and the "second" are in the same message or not. For another example, describing an object as "level", ordinal words preceding "level" in "first level" and "second level" do not limit priority between "levels". As another example, the number of descriptive objects is not limited by ordinal words, and may be one or more, taking "first device" as an example, where the number of "devices" may be one or more. Furthermore, objects modified by different prefix words may be the same or different, e.g., the description object is "a device", then "a first device" and "a second device" may be the same device or different devices, and the types may be the same or different; for another example, the description object is "information", and the "first information" and the "second information" may be the same information or different information, and the contents thereof may be the same or different.

In some embodiments, "comprising a", "containing a", "for indicating a", "carrying a", may be interpreted as carrying a directly, or as indicating a indirectly.

In some embodiments, terms "responsive to … …", "responsive to determination … …", "in the case of … …", "at … …", "when … …", "if … …", "if … …", and the like may be interchanged.

In some embodiments, terms "greater than", "greater than or equal to", "not less than", "more than or equal to", "not less than", "above" and the like may be interchanged, and terms "less than", "less than or equal to", "not greater than", "less than or equal to", "not more than", "below", "lower than or equal to", "no higher than", "below" and the like may be interchanged.

In some embodiments, an apparatus or the like may be interpreted as an entity, or may be interpreted as a virtual, and the names thereof are not limited to the names described in the embodiments, "apparatus," "device," "circuit," "network element," "node," "function," "unit," "section," "system," "network," "chip system," "entity," "body," and the like may be replaced with each other.

In some embodiments, a "network" may be interpreted as an apparatus (e.g., access network device, core network device, etc.) contained in a network.

In some embodiments, "access network device (access network device, AN device)", "radio access network device (radio access network device, RAN device)", "Base Station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node (node)", "access point (access point)", "transmit point (transmission point, TP)", "Receive Point (RP)", "transmit receive point (transmit/receive point), the terms TRP), panel, antenna array, cell, macrocell, microcell, femtocell, sector, cell group, carrier, component carrier, bandwidth part, BWP, etc. may be replaced with each other.

In some embodiments, "terminal," terminal device, "" user equipment, "" user terminal, "" mobile station, "" mobile terminal, MT) ", subscriber station (subscriber station), mobile unit (mobile unit), subscriber unit (subscriber unit), wireless unit (wireless unit), remote unit (remote unit), mobile device (mobile device), wireless device (wireless device), wireless communication device (wireless communication device), remote device (remote device), mobile subscriber station (mobile subscriber station), access terminal (access terminal), mobile terminal (mobile terminal), wireless terminal (wireless terminal), remote terminal (remote terminal), handheld device (handset), user agent (user agent), mobile client (mobile client), client (client), and the like may be substituted for each other.

In some embodiments, the access network device, core network device, or network device may be replaced with a terminal. For example, the embodiments of the present disclosure may be applied to a configuration in which communication between an access network device, a core network device, or a network device and a terminal is replaced with communication between a plurality of terminals (for example, may also be referred to as device-to-device (D2D), vehicle-to-device (V2X), or the like). In this case, the terminal may have all or part of the functions of the access network device. Further, the language such as "uplink" and "downlink" may be replaced with a language (for example, "side") corresponding to the communication between terminals. For example, uplink channels, downlink channels, etc. may be replaced with side-uplink channels, uplink, downlink, etc. may be replaced with side-downlink channels.

In some embodiments, the terminal may be replaced with an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have all or part of the functions of the terminal.

In some embodiments, the acquisition of data, information, etc. may comply with laws and regulations of the country of locale.

In some embodiments, data, information, etc. may be obtained after user consent is obtained.

In some embodiments, the threshold values mentioned in this embodiment may be numerical values, constants, or some fixed values, etc.

Furthermore, each element, each row, or each column in the tables of the embodiments of the present disclosure may be implemented as a separate embodiment, and any combination of elements, any rows, or any columns may also be implemented as a separate embodiment.

The correspondence relationships shown in the tables in the present disclosure may be configured or predefined. The values of the information in each table are merely examples, and may be configured as other values, and the present disclosure is not limited thereto. In the case of the correspondence between the configuration information and each parameter, it is not necessarily required to configure all the correspondence shown in each table. For example, in the table in the present disclosure, the correspondence shown by some rows may not be configured. For another example, appropriate morphing adjustments, e.g., splitting, merging, etc., may be made based on the tables described above. The names of the parameters indicated in the tables may be other names which are understood by the communication device, and the values or expressions of the parameters may be other values or expressions which are understood by the communication device. When the tables are implemented, other data structures may be used, for example, an array, a queue, a container, a stack, a linear table, a pointer, a linked list, a tree, a graph, a structure, a class, a heap, a hash table, or a hash table.

Predefined in this disclosure may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-sintering.

The communication method, the terminal, the network device and the communication system provided by the present disclosure are described in detail below with reference to the accompanying drawings.

Fig. 3 illustrates a block diagram of a communication system, as shown in fig. 3, which may include a network device 11 and a terminal 12, according to an embodiment of the present disclosure.

In some examples, the network device 11 may be an entity on the network side for transmitting or receiving signals. For example, the network device 11 may be a communication satellite, an evolved NodeB (eNB), a transmission point (transmission reception point, TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems or an access node in a wireless fidelity (wireless fidelity, wiFi) system, or the like. The embodiment of the present disclosure is not limited to the specific technology and the specific device configuration adopted by the network device 11. The network device 11 provided in the embodiments of the present disclosure may be composed of a Central Unit (CU) and a Distributed Unit (DU), where the CU may also be referred to as a control unit (control unit), the structure of the CU-DU may be used to split the protocol layers of the network device, such as a base station, and the functions of part of the protocol layers are placed in the CU for centralized control, and the functions of part or all of the protocol layers are distributed in the DU, so that the CU centrally controls the DU.

In some examples, the terminal 12 may be referred to as a terminal device (terminal), a user equipment (ue), a Mobile Station (MS), a mobile terminal device (MT), or the like. The terminal 12 may also be an automobile with communication function, a smart car, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with wireless transceiving function, a virtual reality device, an augmented reality device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned-driving (self-driving), a wireless terminal device in teleoperation (remote medical surgery), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transport security), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like. Embodiments of the present disclosure are not limited to the particular technology and particular device configuration employed by the terminal 12.

It may be understood that, the communication processing system described in the embodiments of the present disclosure is for more clearly describing the technical solution of the embodiments of the present disclosure, and is not limited to the technical solution set forth in the embodiments of the present disclosure, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of new service scenarios, the technical solution set forth in the embodiments of the present disclosure is applicable to similar technical problems.

The embodiments of the present disclosure described below may be applied to the communication processing system shown in fig. 1, or a part of the main body, but are not limited thereto. The respective bodies shown in fig. 1 are examples, and the communication processing system may include all or part of the bodies in fig. 1, or may include other bodies than fig. 1, and the number and form of the respective bodies are arbitrary, and the connection relationship between the respective bodies is examples, and the respective bodies may be not connected or may be connected, and the connection may be arbitrary, direct connection or indirect connection, or wired connection or wireless connection.

The embodiments of the present disclosure may be applied to satellite communications, long term evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), upper 3G, IMT-Advanced, fourth generation mobile communication system (4th generation mobile communication system,4G)), fifth generation mobile communication system (5th generation mobile communication system,5G), 5G NR, future wireless access (Future Radio Access, FRA), new wireless access technology (New-Radio Access Technology, RAT), new Radio, NR, new wireless access (New Radio access, NX), future generation wireless access (Future generation Radio access, FX), global System for Mobile communications (GSM (registered trademark)), CDMA2000, ultra mobile broadband (Ultra Mobile Broadband, UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra WideBand (Ultra-wide band, UWB), bluetooth (registered trademark)), land-based public communication network (Public Land Mobile Network, PLMN) network, device to Device (Device-D), device to Device (V-D2, device to internet of things system, internet of things (internet of things), machine (V2, internet of things system extension, V2, internet of things (internet of things), internet of things system (V2, etc. In addition, a plurality of system combinations (e.g., LTE or a combination of LTE-a and 5G, etc.) may be applied.

In some examples, the network device 11 sends first information to the terminal 12, the terminal 12 receives the first information sent by the network device 11, and the terminal 12 determines whether to initiate connection reestablishment after the out-of-service time of the serving cell in which it is located arrives according to the first information.

In the embodiment, after the stop service time of the service cell where the terminal is located arrives, whether the terminal initiates connection reestablishment can be accurately controlled based on network configuration, so that the success rate of connection reestablishment is improved, the connection reestablishment process aiming at the NTN is further enhanced, and the success rate of the terminal accessing the NTN is further improved.

Further, to illustrate a specific implementation of the above communication processing system, fig. 4 shows a schematic diagram of a communication method according to an embodiment of the disclosure. The method is applied to the communication system, as shown in fig. 4, and may include the following steps:

step S201, the network equipment sends first information to the terminal.

Step S202, the terminal determines whether to initiate connection reestablishment after the service stopping time of the serving cell is reached according to the first information.

For this embodiment, when the terminal determines that the service stopping time of the serving cell is reached, whether the terminal initiates connection reestablishment may be determined based on the first information sent by the network device, so as to improve the success rate of connection reestablishment. For example, in a discontinuous coverage scenario (i.e. the coverage areas of the serving cell and the neighboring cell do not overlap), whether the terminal initiates connection reestablishment can be accurately determined based on the first information sent by the network device, so as to improve the success rate of connection reestablishment.

In some embodiments, the first information may be a communication information, such as an indication information or a signaling, for example, the first information may be sent through radio resource Control (Radio Resource Control, RRC) signaling and/or Media AccessControl, MAC Control Element (CE) and/or downlink Control information (Downlink Control Information, DCI) bearer, for example.

In some embodiments, the first information may include: configuration information allowing the terminal to initiate connection re-establishment. For example, the network device allows the terminal to initiate a relevant configuration of connection reestablishment, and the terminal determines whether to initiate connection reestablishment after the service stopping time of the serving cell in which the terminal is located arrives according to the relevant configuration.

In some embodiments, the configuration information allowing the terminal to initiate connection re-establishment comprises at least one of the following (A1 to A3):

a1, allowing a terminal to initiate a time threshold of service start time of a connection reestablishment neighbor cell; for example, the network configuration allows a time threshold for the neighbor cell t-ServiceStart of the connection reestablishment procedure.

A2, enabling configuration for allowing the terminal to initiate connection reestablishment to at least one adjacent cell; for example, the network configuration enables fast connection reestablishment by which the terminal may initiate fast connection reestablishment to at least one neighbor cell.

A3, at least one neighbor cell allowing the terminal to initiate connection reestablishment. For example, the network indicates one or more cells that allow the terminal to make a fast connection re-establishment.

In some embodiments, if the network device indicates one or more neighbor cells that allow fast connection reestablishment, the fast connection reestablishment may be enabled on behalf of the network device, which may not explicitly indicate the enabled configuration. Alternatively, the network device may explicitly transmit the information element (Information Element, IE) of the enable configuration, etc. while indicating the neighbor cell.

If the terminal has a plurality of adjacent cells and the t-ServiceStart difference of each adjacent cell is relatively large, the terminal starts to start connection reestablishment at the t-ServiceStart time of which adjacent cell is a technical problem to be solved. To solve this technical problem, in some embodiments, if the configuration information allowing the terminal to initiate connection reestablishment includes the enabling configuration and does not include at least one neighbor cell allowing the terminal to initiate connection reestablishment (i.e., the network does not indicate one or more neighbor cells allowing fast connection reestablishment), determining, according to the first information, that the out-of-service time of the serving cell in which the terminal is located has arrived, and performing one of the following (B1 to B2):

B1, selecting the earliest service starting time from the service starting time of all neighbor cells of the terminal to start connection reestablishment; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment, but if the network does not configure a neighboring cell that allows the quick connection reestablishment to be initiated, the terminal may initiate the connection reestablishment at the earliest time of t-ServiceStart in all neighboring cells.

B2, starting connection reestablishment at the service start time of one neighbor cell selected from all neighbor cells by the terminal; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment, but if the network does not have a neighboring cell that is allowed to initiate the quick connection reestablishment, the terminal may autonomously select one neighboring cell to initiate the connection reestablishment according to the time t-ServiceStart of the neighboring cell.

In a specific application, the network device may configure at least one neighbor cell that allows the terminal to initiate connection re-establishment. Accordingly, in some embodiments, if the configuration information allowing the terminal to initiate connection reestablishment includes at least one neighboring cell allowing the terminal to initiate connection reestablishment, according to the first information, after determining that the out-of-service time of the serving cell in which the terminal is located arrives, one of the following (C1 to C4) is performed:

C1, starting connection reestablishment according to service starting time of a neighbor cell allowing a terminal to initiate connection reestablishment; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network configuration has a neighboring cell that allows the quick connection reestablishment to be initiated, the terminal may initiate the connection reestablishment according to the t-ServiceStart time of the neighboring cell.

C2, selecting the earliest service starting time from the service starting times of a plurality of adjacent cells allowing the terminal to initiate connection reestablishment; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network is configured with a plurality of neighbor cells that allow the quick connection reestablishment to be initiated, the terminal may initiate the connection reestablishment at the earliest time of t-ServiceStart in the neighbor cells.

C3, starting connection reestablishment at the service start time of one neighbor cell selected by the terminal from the plurality of neighbor cells; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network is configured with a plurality of neighbor cells allowing the quick connection reestablishment to be initiated, the terminal may autonomously select one neighbor cell from the neighbor cells and initiate the connection reestablishment according to the t-ServiceStart time of the neighbor cell.

C4, determining that the terminal immediately starts connection reestablishment; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network is configured with one or more neighbor cells that allow the quick connection reestablishment to be initiated, the terminal may also immediately start the connection reestablishment procedure.

In some embodiments, if it is determined that the terminal immediately starts connection reestablishment, a starting time of a cell selection procedure in connection reestablishment is determined according to a service start time of at least one neighbor cell that allows the terminal to initiate connection reestablishment. According to the scheme of the embodiment, if the terminal immediately starts connection reestablishment, the cell selection flow in connection reestablishment can be delayed by the mode because the service starting time of the adjacent cell is not yet reached, so that the success rate of connection reestablishment is improved, the connection reestablishment process for the NTN is further enhanced, and the success rate of the terminal accessing the NTN is further improved.

In some embodiments, the starting time of the cell selection procedure in connection reestablishment is determined according to the service start time of at least one neighbor cell allowing the terminal to initiate connection reestablishment, including one of the following (D1 to D3):

D1, starting a cell selection process according to the service start time of a neighbor cell allowing a terminal to initiate connection reestablishment; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network configuration has a neighboring cell that allows the quick connection reestablishment to be initiated, the terminal may immediately start the connection reestablishment procedure, and start the cell selection procedure according to the t-ServiceStart time of the neighboring cell, thereby delaying the cell selection procedure of the reestablishment procedure.

D2, selecting the earliest service start time in the service start time of a plurality of adjacent cells allowing the terminal to initiate connection reestablishment, and starting a cell selection flow; for example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network is configured with a plurality of neighbor cells that allow the quick connection reestablishment to be initiated, the terminal may immediately start the connection reestablishment procedure, and start the cell selection procedure according to the earliest t-ServiceStart time in the neighbor cells, thereby delaying the cell selection procedure of the reestablishment procedure.

And D3, starting a cell selection process at the service start time of one neighbor cell selected from the neighbor cells by the terminal. For example, after the service stopping time of the serving cell arrives, if the network configuration enables the quick connection reestablishment and the network is configured with a plurality of neighbor cells allowing the quick connection reestablishment to be initiated, the terminal may immediately start the connection reestablishment procedure, and the terminal may autonomously select one neighbor cell from the neighbor cells to start the cell selection procedure according to the t-ServiceStart time of the neighbor cell, thereby delaying the cell selection procedure of the reestablishment procedure.

Further, in some embodiments, if the terminal immediately starts the connection reestablishment procedure and delays the cell selection procedure of the reestablishment procedure in the above manner (any one of D1 to D3), the starting time of the T311 timer may be determined according to the starting time of the cell selection procedure. The T311 timer is a connection reestablishment related timer, and can be used to determine whether the continuous reestablishment fails, if T311 is overtime, it indicates that the connection reestablishment fails, and the terminal leaves the connection state. Therefore, the embodiment can delay the starting time of the T311 to the starting time of the cell selection process, thereby improving the success rate of connection reestablishment.

The above embodiment illustrates the case where the configuration information includes at least one neighbor cell that enables configuration and/or allows the terminal to initiate connection re-establishment. In addition, the configuration information that allows the terminal to initiate connection reestablishment may further include a time threshold for a service start time of a neighboring cell that allows the terminal to initiate connection reestablishment.

In some embodiments, the time threshold comprises at least one of the following (E1 to E2):

e1, absolute time threshold of service start time of neighbor cell.

And E2, a relative time threshold of a time difference value, wherein the time difference value is a time difference value between the service start time of the adjacent cell and the service stop time of the service cell.

Further, in some embodiments, the neighbor cells meeting the time threshold requirement include at least one of the following (F1 to F2):

f1, the service start time is smaller than or equal to the adjacent cell of the absolute time threshold; for example, the absolute time threshold may be a specific time point, and if the service start time of the neighboring cell a is later than the time point of the absolute time threshold (i.e. the service start time is greater than the absolute time threshold), it is indicated that the service start time of the neighboring cell a is far from the service stop time of the serving cell, and the connection reestablishment initiated by the terminal is likely to fail, resulting in resource waste, so that the neighboring cell a does not meet the time threshold requirement. If the service start time of the neighboring cell B is earlier than the time point of the absolute time threshold (i.e., the service start time is smaller than the absolute time threshold), it is indicated that the service start time of the neighboring cell B is closer to the stop service time of the serving cell, and the neighboring cell B meets the time threshold requirement.

F2, the time difference between the service start time and the service stop time of the service cell is smaller than or equal to the adjacent cell of the relative time threshold; for example, the relative time threshold may be a threshold, and if the difference between the service start time of the neighboring cell C and the service stop time of the serving cell is greater than the threshold, it indicates that the service start time of the neighboring cell C is far from the service stop time of the serving cell, and the connection reestablishment initiated by the terminal is likely to fail, resulting in resource waste, so that the neighboring cell C does not meet the time threshold requirement. If the time difference between the service start time of the adjacent cell D and the stop service time of the service cell is smaller than the threshold value, the service start time of the adjacent cell D is close to the stop service time of the service cell, and the adjacent cell D meets the time threshold requirement.

In some embodiments, if the configuration information that allows the terminal to initiate connection reestablishment includes at least one of the time thresholds (F1 to F2), the terminal determines, according to the first information, that the out-of-service time of the serving cell in which the terminal is located arrives, and then performs the following steps (G1 to G3):

g1, selecting the earliest service start time from the service start time of the neighbor cells meeting the time threshold requirement to start connection reestablishment; for example, after the service stopping time of the serving cell arrives, if the network configures a time threshold, the terminal starts a connection reestablishment procedure at the earliest t-ServiceStart time in the neighbor cell meeting the t-ServiceStart threshold requirement.

G2, starting connection reestablishment at the service start time of one neighbor cell selected by the terminal from neighbor cells meeting the time threshold requirement; for example, after the service stopping time of the service cell reaches, if the network configures a time threshold, the terminal autonomously selects one neighbor cell from the neighbor cells meeting the t-ServiceStart threshold requirement and starts a connection reestablishment process according to the t-ServiceStart moment.

And G3, determining that the terminal immediately starts connection reestablishment. For example, after the service stopping time of the serving cell arrives, if the network configures a time threshold, the terminal may also immediately start the connection reestablishment procedure.

In some embodiments, if it is determined that the terminal immediately starts connection reestablishment, a starting time of a cell selection procedure in connection reestablishment is determined according to a service start time of at least one neighboring cell that meets a time threshold requirement. According to the scheme of the embodiment, if the terminal immediately starts connection reestablishment, the cell selection flow in connection reestablishment can be delayed by the mode because the service starting time of the adjacent cell is not yet reached, so that the success rate of connection reestablishment is improved, the connection reestablishment process for the NTN is further enhanced, and the success rate of the terminal accessing the NTN is further improved.

In some embodiments, the starting time of the cell selection procedure in connection reestablishment is determined according to the service start time of at least one neighboring cell meeting the time threshold requirement, including one of the following (H1 to H3):

h1, starting a cell selection process according to the service start time of one neighbor cell meeting the time threshold requirement; for example, after the service stopping time of the serving cell arrives, if the network configures a time threshold and only one neighboring cell meeting the time threshold requirement, the terminal may immediately start the connection reestablishment procedure, and start the cell selection procedure according to the t-ServiceStart time of the neighboring cell, thereby delaying the cell selection procedure of the reestablishment procedure.

H2, selecting the earliest service start time from the service start times of a plurality of adjacent cells meeting the time threshold requirement to start a cell selection process; for example, after the service stopping time of the serving cell arrives, if the network configures a time threshold and a plurality of neighbor cells meeting the time threshold requirement, the terminal can immediately start a connection reestablishment flow, and start a cell selection flow according to the earliest time of t-ServiceStart in the neighbor cells, thereby delaying the cell selection flow of the reestablishment flow.

And H3, starting a cell selection process at the service start time of one neighbor cell selected from the neighbor cells by the terminal. For example, after the service stopping time of the serving cell arrives, if the network configures a time threshold and a plurality of neighbor cells meet the time threshold requirement, the terminal can immediately start a connection reestablishment procedure, and the terminal can autonomously select one neighbor cell from the neighbor cells to start the cell selection procedure according to the t-ServiceStart time of the neighbor cell, thereby delaying the cell selection procedure of the reestablishment procedure.

Further, in some embodiments, if the terminal immediately starts the connection reestablishment procedure and delays the cell selection procedure of the reestablishment procedure by the above manner (any one of H1 to H3), the starting time of the T311 timer may be determined according to the starting time of the cell selection procedure. The T311 timer is a connection reestablishment related timer, and can be used to determine whether the continuous reestablishment fails, if T311 is overtime, it indicates that the connection reestablishment fails, and the terminal leaves the connection state. Therefore, the embodiment can delay the starting time of the T311 to the starting time of the cell selection process, thereby improving the success rate of connection reestablishment.

Step S203, the terminal determines that it suspends the AS operation in the first period.

In a specific application, the terminal may determine that the terminal suspends AS operation for a first period of time if it delays until t-ServiceStart for connection reestablishment; wherein the first time period is a time period between an arrival time of a stop service time of the serving cell and a time of initiating connection reestablishment. In this way, if the terminal delays to t-ServiceStart to reestablish the connection, the terminal behavior from the service stopping time of the service cell to the connection reestablishing time is defined, so that the resource consumption can be saved.

In some embodiments, suspending the AS operation may include at least one of the following being suspended (I1 to I7):

i1, an RLM related timer; i2, a data inactivity timer; i3, CHO execution; i4, neighbor cell measurement; i5, random access; i6, SR; i7, BSR.

For example, if the terminal delays to t-ServiceStart for connection reestablishment, the AS operation, including RLM related timer, data inactivity timer, CHO execution, neighbor cell measurement, random access, SR, BSR, etc., is suspended from the serving cell's out-of-service time to the connection reestablishment time.

In some embodiments, it is determined that the T317 timer is running within a first period of time. For example, if the terminal delays until T-ServiceStart to reestablish connection, the T317 timer is not suspended from the service stopping time of the serving cell to the time of reestablishing connection, the continuous running T317 timer is a timer for the terminal to determine whether SIB31 or SIB31-NB is valid, the terminal starts the T317 timer after acquiring SIB31 or SIB31-NB, if the T317 timer expires, the terminal considers that the acquired SIB31 or SIB31-NB fails, and the terminal retries acquiring SIB31 or SIB31-NB, and in this embodiment, T317 is not suspended in the first period to continue running to meet the corresponding requirement.

In some embodiments, it is determined that the T318 timer is stopped for a first period of time. For example, if the terminal delays to T-ServiceStart to reestablish the connection, the T318 timer is suspended from the service stopping time of the serving cell to the time of reestablishing the connection, and the operation is suspended, so that the link problem is avoided.

To illustrate a specific implementation of a terminal, fig. 5 shows a flow chart of a communication method according to an embodiment of the disclosure. The method is applied to terminal side execution and can comprise the following steps.

Step S301, the terminal receives the first information.

Step S302, the terminal determines whether to initiate connection reestablishment after the service stopping time of the serving cell is reached according to the first information.

In some embodiments, the first information comprises: configuration information allowing the terminal to initiate connection reestablishment.

In some embodiments, the configuration information includes at least one of:

In some embodiments, if the configuration information includes the enabling configuration and does not include at least one neighboring cell that allows the terminal to initiate connection reestablishment, determining, according to the first information, that the out-of-service time of the serving cell in which the terminal is located arrives, and performing one of the following steps:

In some embodiments, if the configuration information includes at least one neighboring cell that allows the terminal to initiate connection reestablishment, one of the following is performed after determining, according to the first information, that a service stopping time of a serving cell in which the terminal is located has arrived:

In some embodiments, if it is determined that the terminal immediately starts connection reestablishment, a starting time of a cell selection procedure in connection reestablishment is determined according to a service start time of at least one neighbor cell that allows the terminal to initiate connection reestablishment.

In some embodiments, the determining the starting time of the cell selection procedure in connection reestablishment according to the service start time of at least one neighboring cell that allows the terminal to initiate connection reestablishment includes one of the following:

In some embodiments, the time threshold comprises at least one of:

an absolute time threshold of the service start time; a relative time threshold of a time difference of the service start time from the service stop time.

In some embodiments, if the configuration information includes the time threshold, determining, according to the first information, that the out-of-service time of the serving cell in which the terminal is located arrives, and executing the operation includes one of:

In some embodiments, if it is determined that the terminal immediately starts connection reestablishment, a starting time of a cell selection procedure in connection reestablishment is determined according to a service start time of at least one neighboring cell that meets the time threshold requirement.

In some embodiments, the determining the starting time of the cell selection procedure in connection reestablishment according to the service start time of at least one neighboring cell meeting the time threshold requirement includes one of the following:

In some embodiments, the starting time of the T311 timer may be determined according to the starting time of the cell selection procedure.

In some embodiments, it may be determined that the terminal suspends AS operation for a first period of time; wherein the first time period is a time period between an arrival time of the out-of-service time and a time of initiating connection reestablishment.

In some embodiments, the suspending AS operation includes at least one of:

RLM-related timers; a data inactivity timer; CHO execution; neighbor cell measurement; random access; SR; BSR.

In some embodiments, it is determined that the T317 timer is running within the first period of time.

In some embodiments, it is determined that the T318 timer is stopped for the first period of time.

The specific examples in this embodiment may be described with reference to the corresponding descriptions of the embodiments in fig. 1 to 4, and are not repeated here.

Fig. 6 shows a flow diagram of a communication method according to an embodiment of the disclosure. As shown in fig. 6, the method applied to the network device side may include the following steps.

Step S401, the network device sends first information.

The first information is used for determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives.

In some embodiments, the configuration information includes at least one of:

In some embodiments, if the configuration information includes the enabling configuration and does not include at least one neighboring cell that allows the terminal to initiate connection reestablishment, the configuration information is used to determine that a service stopping time of a serving cell in which the terminal is located has arrived, and then one of the following is performed:

In some embodiments, if the configuration information includes at least one neighboring cell that allows the terminal to initiate connection reestablishment, the configuration information is used to determine that a service stop time of a serving cell in which the terminal is located has arrived, and then one of the following is performed:

In some embodiments, the time threshold comprises at least one of:

an absolute time threshold for the service start time; a relative time threshold of a time difference of a service start time from the out-of-service time.

In some embodiments, if the configuration information includes the time threshold, the configuration information is used to determine that the out-of-service time of the serving cell in which the terminal is located has arrived, and then one of the following is performed:

The specific examples in this embodiment may be described with reference to the corresponding descriptions of the embodiments in fig. 1 to 5, and are not repeated here.

Fig. 7 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure, and as shown in fig. 7, the embodiment of the present disclosure relates to a communication method, where the method includes:

Step S501, the network device sends first information to the terminal.

Alternative implementations of step 501 may refer to step 201 of fig. 4, step 301 of fig. 5, alternative implementations of step 401 of fig. 6, and other relevant parts in the embodiments related to fig. 4, 5, and 6, which are not described herein.

Step S502, the terminal receives the first information sent by the network device, and determines whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives according to the first information.

Alternative implementations of step 501 may refer to step 202 of fig. 4, alternative implementations of step 302 of fig. 5, and other relevant parts in the embodiments related to fig. 4, 5, and 6, which are not described herein.

In some embodiments, the method may include the method described in the embodiments of the communication system side, the terminal side, the network device side, and so on, which are not described herein.

The embodiment of the disclosure relates to a communication method, which comprises the following steps:

step 1, deciding whether to initiate a connection reestablishment procedure based on the network configuration, including one or more of the following cases (a 1 to a 2):

a1, a network configuration time threshold, namely a time threshold of a neighbor cell t-ServiceStart of a network configuration permission connection reestablishment flow.

In some embodiments, the time threshold configuration, the network may indicate an absolute time threshold for t-ServiceStart, and may also indicate a time threshold for t-ServiceStart to be a time difference from the serving cell's t-service stop time.

a2, the network performs enabling configuration, namely if the network configuration enables quick connection reestablishment, the UE starts a connection reestablishment flow.

In some embodiments, for an enabled configuration, the network indicates one or more neighbor cells that allow fast connection reestablishment.

In some embodiments, if the network indicates one or more neighbor cells that allow fast connection reestablishment, the fast connection reestablishment is enabled on behalf of the network, the enabling may not be explicitly indicated. Of course, the network may also explicitly send an enable configuration Information Element (IE) while indicating the neighbor cell.

In some embodiments, after the arrival of the out-of-service time of the serving cell, if the network enables the fast connection reestablishment, but if the network is not configured with a neighbor cell that allows the fast connection reestablishment, the UE initiates the connection reestablishment procedure (b 1 to b 2) according to one of the following:

b1, starting connection reestablishment at the earliest time of t-ServiceStart in all adjacent cells.

b2, the UE autonomously selects one adjacent cell to start connection reestablishment according to the t-ServiceStart moment.

In some embodiments, after the arrival of the out-of-service time of the serving cell, if the network enables the fast connection reestablishment, if the network is configured with one or more neighbor cells that allow the fast connection reestablishment to be initiated, the UE initiates the connection reestablishment procedure (c 1 to c 4) according to one of the following:

and c1, if a neighboring cell is configured, starting connection reestablishment according to the t-ServiceStart time of the neighboring cell.

And c2, if a plurality of adjacent cells are configured, starting connection reestablishment according to the earliest time of t-ServiceStart in the adjacent cells.

And c3, if a plurality of adjacent cells are configured, the UE autonomously selects one adjacent cell to start connection reestablishment according to the t-ServiceStart moment.

And c4, immediately starting a connection reestablishment flow.

In some embodiments, if the connection reestablishment procedure is started immediately, the cell selection procedure (d 1 to d 3) of the reestablishment procedure may be delayed as follows:

d1, if a neighboring cell is configured, starting a cell selection flow according to the t-ServiceStart time of the neighboring cell.

d2, if a plurality of adjacent cells are configured, starting a cell selection flow according to the earliest time of t-ServiceStart in the adjacent cells.

d3, if a plurality of adjacent cells are configured, the UE autonomously selects one adjacent cell and starts a cell selection flow according to the t-ServiceStart moment.

In some embodiments, the start time of T311 is delayed to the time the cell selection procedure starts.

In some embodiments, if the network is configured with a time threshold, after the out-of-service time of the serving cell has arrived, the UE performs one of the following operations (e 1 to e 3):

and e1, the UE starts a connection reestablishment flow at the earliest t-ServiceStart moment in the neighbor cell meeting the t-ServiceStart threshold requirement.

And e2, the UE autonomously selects one adjacent cell from the adjacent cells meeting the t-ServiceStart threshold requirement and starts a connection reestablishment flow according to the t-ServiceStart moment.

And e3, immediately starting a connection reestablishment flow.

In some embodiments, if the connection reestablishment procedure is started immediately, the cell selection procedure (f 1 to f 3) of the reestablishment procedure may be delayed as follows:

and f1, if a neighboring cell is configured, starting a cell selection flow according to the t-ServiceStart time of the neighboring cell.

And f2, if a plurality of adjacent cells are configured, starting a cell selection flow according to the earliest time of t-ServiceStart in the adjacent cells.

And f3, if a plurality of adjacent cells are configured, the UE autonomously selects one adjacent cell and starts a cell selection flow according to the t-ServiceStart moment.

And step 2, the UE suspends the AS operation in the period from the service stopping time of the service cell to the time before the connection reestablishment flow is initiated.

In some embodiments, the AS operation may include: RLM related timers, data inactivity timers, CHO execution, neighbor cell measurements, random access, SR, BSR, etc.

In some embodiments, T317 does not hang and continues to run.

In some embodiments, T318 is suspended.

The embodiments of the present disclosure also provide an apparatus for implementing any of the above methods, for example, an apparatus is provided, where the apparatus includes a unit or a module for implementing each step performed by the terminal in any of the above methods. For another example, another apparatus is also proposed, which includes a unit or module configured to implement steps 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.

It should be understood that the division of each unit or module in the above apparatus is merely a division of a logic function, and may be fully or partially integrated into one physical entity or may be physically separated when actually implemented. Furthermore, units or modules in the apparatus may be implemented in the form of processor-invoked software: the device comprises, for example, a processor, the processor being connected to a memory, the memory having instructions stored therein, the processor invoking the instructions stored in the memory to perform any of the methods or to perform the functions of the units or modules of the device, wherein the processor is, for example, a general purpose processor, such as a central processing unit (Central Processing Unit, CPU) or microprocessor, and the memory is internal to the device or external to the device. Alternatively, the units or modules in the apparatus may be implemented in the form of hardware circuits, and part or all of the functions of the units or modules may be implemented by designing hardware circuits, which may be understood as one or more processors; for example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the units or modules are implemented by designing the logic relationships of elements in the circuit; for another example, in another implementation, the above hardware circuit may be implemented by a programmable logic device (programmable logic device, PLD), for example, a field programmable gate array (Field Programmable Gate Array, FPGA), which may include a large number of logic gates, and the connection relationship between the logic gates is configured by a configuration file, so as to implement the functions of some or all of the above units or modules. All units or modules of the above device may be realized in the form of invoking software by a processor, or in the form of hardware circuits, or in part in the form of invoking software by a processor, and in the rest in the form of hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capabilities, and in one implementation, the processor may be a circuit with instruction reading and running capabilities, such as a central processing unit (Central Processing Unit, CPU), microprocessor, graphics processor (graphics processing unit, GPU) (which may be understood as a microprocessor), or digital signal processor (digital signal processor, DSP), etc.; in another implementation, the processor may implement a function through a logical relationship of hardware circuits that are fixed or reconfigurable, e.g., a hardware circuit implemented as an application-specific integrated circuit (ASIC) or a programmable logic device (programmable logic device, PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads the configuration document, and the process of implementing the configuration of the hardware circuit may be understood as a process of loading instructions by the processor to implement the functions of some or all of the above units or modules. Furthermore, hardware circuits designed for artificial intelligence may be used, which may be understood as ASICs, such as neural network processing units (Neural Network Processing Unit, NPU), tensor processing units (Tensor Processing Unit, TPU), deep learning processing units (Deep learning Processing Unit, DPU), etc.

Fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. As shown in fig. 8, the terminal may include: at least one of the first transceiver module 51, the first processing module 52, and the like. In some embodiments, the first transceiver module 51 is configured to receive first information; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information. Optionally, the first transceiver module 51 is configured to perform at least one of the communication steps (e.g. step S201, but not limited thereto) such as transmission and/or reception performed by the terminal in any of the above methods, which is not described herein. Optionally, the first processing module 52 is configured to perform at least one of the other steps (e.g. step S202, step S203, but not limited thereto) performed by the terminal in any of the above methods, which is not described herein.

Fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. As shown in fig. 9, the terminal may include: a second transceiver module 61. In some embodiments, the second transceiver module 61 is configured to send the first information; the first information is used for determining whether to initiate connection reestablishment after the service stopping time of the serving cell where the terminal is located reaches, which is not described herein.

In some embodiments, the first transceiver module 51 and the second transceiver module 61 may include a transmitting module and/or a receiving module, which may be separate or integrated. Alternatively, the transceiver module may be interchangeable with a transceiver.

In some embodiments, the first processing module 52 may be a single module or may include multiple sub-modules. Optionally, the plurality of sub-modules perform all or part of the steps required to be performed by the processing module, respectively. Alternatively, the processing module may be interchanged with the processor.

Fig. 10 is a schematic structural diagram of a communication device 8100 according to an embodiment of the present disclosure. The communication device 8100 may be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip system, a processor, etc. that supports the network device to implement any of the above methods, or a chip, a chip system, a processor, etc. that supports the terminal to implement any of the above methods. The communication device 8100 may be used to implement the method described in the above method embodiments, and reference may be made in particular to the description of the above method embodiments.

As shown in fig. 10, communication device 8100 includes one or more processors 8101. The processor 8101 may be a general-purpose processor or a special-purpose processor, etc., and may be, for example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process data for the programs. Optionally, the communication device 8100 is configured to perform any of the above methods. Optionally, the one or more processors 8101 are configured to invoke instructions to cause the communication device 8100 to perform any of the above methods.

In some embodiments, communication device 8100 also includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs at least one of the communication steps (e.g., but not limited to step S201) of transmission and/or reception, etc., in the above-described method, and the processor 8101 performs at least one of the other steps (e.g., but not limited to steps S202, S203). In alternative embodiments, the transceiver may include a receiver and/or a transmitter, which may be separate or integrated. Alternatively, terms such as transceiver, transceiver unit, transceiver circuit, interface, etc. may be replaced with each other, terms such as transmitter, transmitter unit, transmitter circuit, etc. may be replaced with each other, and terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

In some embodiments, communication device 8100 also includes one or more memories 8103 for storing data. Alternatively, all or part of memory 8103 may be external to communication device 8100. In alternative embodiments, communication device 8100 may include one or more interface circuits 8104. Optionally, an interface circuit 8104 is coupled to the memory 8102, the interface circuit 8104 being operable to receive data from the memory 8102 or other device, and being operable to transmit data to the memory 8102 or other device. For example, the interface circuit 8104 may read data stored in the memory 8102 and transmit the data to the processor 8101.

The communication device 8100 in the above embodiment description may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by fig. 10. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be: 1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem; (2) A set of one or more ICs, optionally including storage means for storing data, programs; (3) an ASIC, such as a Modem (Modem); (4) modules that may be embedded within other devices; (5) A receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligent device, and the like; (6) others, and so on.

Fig. 11 is a schematic structural diagram of a chip 8200 according to an embodiment of the disclosure. For the case where the communication device 8100 may be a chip or a chip system, reference may be made to a schematic structural diagram of the chip 8200 shown in fig. 11, but is not limited thereto.

The chip 8200 includes one or more processors 8201. The chip 8200 is used to perform any of the above methods.

In some embodiments, the chip 8200 further comprises one or more interface circuits 8202. Alternatively, the terms interface circuit, interface, transceiver pin, etc. may be interchanged. In some embodiments, the chip 8200 further comprises one or more memories 8203 for storing data. Alternatively, all or part of the memory 8203 may be external to the chip 8200. Optionally, an interface circuit 8202 is coupled to the memory 8203, the interface circuit 8202 may be used to receive data from the memory 8203 or other device, and the interface circuit 8202 may be used to transmit data to the memory 8203 or other device. For example, the interface circuit 8202 may read data stored in the memory 8203 and send the data to the processor 8201.

In some embodiments, the interface circuit 8202 performs at least one of the communication steps (e.g., step S201, but not limited thereto) of sending and/or receiving in the above-described method. The interface circuit 8202 performs the communication steps such as transmission and/or reception in the above-described method, for example, by: the interface circuit 8202 performs data interaction between the processor 8201, the chip 8200, the memory 8203, or the transceiver device. In some embodiments, the processor 8201 performs at least one of the other steps (e.g., steps S202, S203, but is not limited thereto).

The modules and/or devices described in the embodiments of the virtual device, the physical device, the chip, etc. may be arbitrarily combined or separated according to circumstances. Alternatively, some or all of the steps may be performed cooperatively by a plurality of modules and/or devices, without limitation.

The present disclosure also proposes a storage medium having stored thereon instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Alternatively, the storage medium described above is a computer-readable storage medium, but is not limited thereto, and it may be a storage medium readable by other devices. Alternatively, the above-described storage medium may be a non-transitory (non-transitory) storage medium, but is not limited thereto, and it may also be a transitory storage medium.

The present disclosure also proposes a program product which, when executed by a communication device 8100, causes the communication device 8100 to perform any of the above methods. Optionally, the above-described program product is a computer program product.

The present disclosure also proposes a computer program which, when run on a computer, causes the computer to perform any of the above methods.

Claims

1. A method of communication, the method comprising:

receiving first information;

and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

2. The method of claim 1, wherein the first information comprises: configuration information allowing the terminal to initiate connection reestablishment.

3. The method of claim 2, wherein the configuration information comprises at least one of:

a time threshold for allowing the terminal to initiate a service initiation time of a connection reestablished neighbor cell;

an enabling configuration allowing the terminal to initiate connection re-establishment to at least one neighbor cell;

at least one neighbor cell allowing the terminal to initiate connection re-establishment.

4. A method according to claim 3, characterized in that the configuration information comprises the enabling configuration and does not comprise at least one neighbor cell allowing the terminal to initiate connection re-establishment; and according to the first information, determining that the service stopping time of the service cell where the terminal is located arrives, and executing one of the following steps:

selecting the earliest service starting time from the service starting times of all neighbor cells of the terminal to start connection reestablishment;

And starting connection reestablishment at the service start time of one neighbor cell selected by the terminal from all neighbor cells.

5. A method according to claim 3, characterized in that the configuration information comprises at least one neighbor cell allowing the terminal to initiate connection re-establishment; and according to the first information, after determining that the service stopping time of the service cell where the terminal is located arrives, executing one of the following steps:

starting connection reestablishment according to the service start time of a neighbor cell allowing the terminal to initiate connection reestablishment;

selecting the earliest service start time from the service start times of a plurality of adjacent cells allowing the terminal to initiate connection reestablishment;

starting connection reestablishment at a service initiation time of one neighbor cell selected by the terminal from the plurality of neighbor cells;

and determining that the terminal immediately starts connection reestablishment.

6. The method of claim 5, wherein the method further comprises:

and determining that the terminal immediately starts connection reestablishment, and determining the starting time of a cell selection flow in connection reestablishment according to the service starting time of at least one neighbor cell allowing the terminal to initiate connection reestablishment.

7. The method according to claim 6, wherein the determining the starting time of the cell selection procedure in connection reestablishment according to the service start time of at least one neighbor cell that allows the terminal to initiate connection reestablishment comprises one of:

starting a cell selection process according to the service start time of a neighbor cell allowing the terminal to initiate connection reestablishment;

selecting the earliest service start time from the service start times of a plurality of adjacent cells allowing the terminal to initiate connection reestablishment, and starting a cell selection flow;

and starting a cell selection process at the service start time of one neighbor cell selected from the neighbor cells by the terminal.

8. The method according to any of claims 3 to 7, wherein the time threshold comprises at least one of:

an absolute time threshold of the service start time;

and a relative time threshold of a time difference value, wherein the time difference value is a time difference value between the service start time and the service stop time.

9. The method of claim 8, wherein the configuration information comprises the time threshold; and according to the first information, determining that the service stopping time of the service cell where the terminal is located arrives, and executing one of the following steps:

Selecting the earliest service start time from the service start time of the neighbor cells meeting the time threshold requirement to start connection reestablishment;

starting connection reestablishment at the service start time of one neighbor cell selected by the terminal from neighbor cells meeting the time threshold requirement;

10. The method according to claim 9, wherein the method further comprises:

and determining that the terminal immediately starts connection reestablishment, and determining the starting time of a cell selection flow in connection reestablishment according to the service starting time of at least one neighbor cell meeting the time threshold requirement.

11. The method according to claim 10, wherein the determining the starting time of the cell selection procedure in connection reestablishment according to the service start time of at least one neighboring cell satisfying the time threshold requirement comprises one of:

starting a cell selection process according to the service start time of one neighbor cell meeting the time threshold requirement;

selecting the earliest service start time from the service start times of a plurality of adjacent cells meeting the time threshold requirement to start a cell selection process;

12. The method according to any of the claims 9 to 11, characterized in that the neighbor cells meeting the time threshold requirement comprise at least one of the following:

neighbor cells with service start times less than or equal to the absolute time threshold;

and the time difference between the service start time and the service stop time is smaller than or equal to the adjacent cell of the relative time threshold.

13. The method according to claim 7 or 11, characterized in that the method further comprises:

and determining the starting time of the T311 timer according to the starting time of the cell selection flow.

14. The method according to any one of claims 1 to 13, further comprising:

determining that the terminal suspends an Access Stratum (AS) operation in a first time period;

wherein the first time period is a time period between an arrival time of the out-of-service time and a time of initiating connection reestablishment.

15. The method of claim 14, wherein the suspending AS operation comprises at least one of:

Radio link monitoring RLM related timers;

a data inactivity timer;

conditional switching CHO execution;

neighbor cell measurement;

random access;

scheduling request SR;

buffer status report BSR.

16. The method according to any one of claims 14 to 15, further comprising:

a T317 timer is determined to run during the first time period.

17. The method according to any one of claims 14 to 16, further comprising:

it is determined that the T318 timer is stopped for the first period of time.

18. A method of communication, the method further comprising:

transmitting first information;

19. The method of claim 18, wherein the first information comprises: configuration information allowing the terminal to initiate connection reestablishment.

20. The method of claim 19, wherein the configuration information comprises at least one of:

At least one neighbor cell allowing the terminal to initiate connection reestablishment;

and enabling configuration for allowing the terminal to initiate connection reestablishment to at least one adjacent cell.

21. The method according to claim 20, characterized in that the configuration information comprises the enabling configuration and does not comprise at least one neighbor cell allowing the terminal to initiate connection re-establishment; the configuration information is used for executing one of the following after determining that the service stopping time of the service cell where the terminal is located is reached:

22. The method according to claim 20, characterized in that the configuration information comprises at least one neighbor cell allowing the terminal to initiate connection re-establishment; the configuration information is used for executing one of the following after determining that the service stopping time of the service cell where the terminal is located is reached:

23. The method of claim 20, wherein the time threshold comprises at least one of:

an absolute time threshold of the service start time;

24. The method of claim 23, wherein the configuration information comprises the time threshold; the configuration information is used for executing one of the following after determining that the service stopping time of the service cell where the terminal is located is reached:

25. The method of claim 24, wherein the neighbor cells that meet the time threshold requirement comprise at least one of:

26. A method of communication, comprising:

the network equipment sends first information to the terminal;

and the terminal receives the first information sent by the network equipment, and determines whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

27. A terminal, comprising:

a first transceiver module configured to receive first information; and determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located reaches according to the first information.

28. A network device, comprising:

a second transceiver module configured to transmit the first information; the first information is used for determining whether to initiate connection reestablishment after the service stopping time of the service cell where the terminal is located arrives.

29. A terminal, comprising:

one or more processors;

wherein the terminal is adapted to perform the method of any of claims 1 to 17.

30. A network device, comprising:

one or more processors;

wherein the network device is adapted to perform the method of any of claims 18 to 25.

31. A communication system comprising a terminal configured to implement the method of any of claims 1 to 17 and a network device configured to implement the method of any of claims 18 to 25.

32. A computer storage medium, wherein the computer storage medium stores computer-executable instructions; the computer executable instructions, when executed by a processor, are capable of implementing the method of any one of claims 1 to 25.