CN117337607A

CN117337607A - Frequency band switching method, terminal, network equipment and storage medium

Info

Publication number: CN117337607A
Application number: CN202380010780.5A
Authority: CN
Inventors: 肖凯; 王磊
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-01-02

Abstract

The present disclosure relates to a frequency band switching method, a terminal, a network device, and a storage medium, the method being performed by the terminal, comprising: the frequency band group meets a first condition, a switching period is determined to be positioned in a first frequency band or a second frequency band, the frequency band group comprises a plurality of frequency bands, the switching period is used for indicating the duration required by the terminal for switching the frequency bands, and the first frequency band is different from the second frequency band. In the above embodiment, a scheme is provided for determining the position of the time length required by the terminal for performing the frequency band switching according to the first condition satisfied by the frequency band group, so that the position of the switching period positioning is determined under the condition that a plurality of frequency bands satisfy the first condition, the problem of fuzzy position of the determined switching period is solved, and the accuracy of determining the position of the switching period is ensured.

Description

Frequency band switching method, terminal, network equipment and storage medium

Technical Field

The disclosure relates to the field of communication technologies, and in particular, to a frequency band switching method, a terminal, a network device, and a storage medium.

Background

With the rapid development of mobile communication technology, the terminal performs uplink transmission through a plurality of frequency bands, and in the uplink transmission process, the terminal also switches between configured frequency bands, and further performs uplink transmission through the switched frequency bands.

Disclosure of Invention

The method and the device solve the problem of inaccurate positioning of the switching period, ensure that the position of the positioning of the switching period is determined under the condition that a plurality of frequency bands meet a first condition, solve the problem of fuzzy position of the determined switching period, and ensure the accuracy of determining the position of the switching period.

The embodiment of the disclosure provides a frequency band switching method, a terminal, network equipment and a storage medium.

According to a first aspect of an embodiment of the present disclosure, a method for switching a frequency band is provided, where the method is performed by a terminal, and the method includes:

the frequency band group meets a first condition, a switching period is determined to be positioned in a first frequency band or a second frequency band, the frequency band group comprises a plurality of frequency bands, the switching period is used for indicating the duration required by the terminal for switching the frequency bands, and the first frequency band is different from the second frequency band.

According to a second aspect of the embodiments of the present disclosure, there is provided a method for switching a frequency band, the method being performed by a network device, the method comprising:

According to a third aspect of the embodiments of the present disclosure, a method for switching a frequency band is provided, where the method includes:

the method comprises the steps that a frequency band group meets a first condition, a terminal determines a switching period to be positioned in a first frequency band or a second frequency band, the frequency band group comprises a plurality of frequency bands, the switching period is used for indicating duration required by the terminal for switching the frequency bands, and the first frequency band is different from the second frequency band;

the frequency band group meets the first condition, and the network equipment determines that the switching period is positioned in the first frequency band or the second frequency band.

According to a fourth aspect of embodiments of the present disclosure, there is provided a terminal, including:

the processing module is used for determining that a switching period is positioned in a first frequency band or a second frequency band when the frequency band group meets a first condition, wherein the frequency band group comprises a plurality of frequency bands, the switching period is used for indicating the duration required by the terminal for switching the frequency bands, and the first frequency band is different from the second frequency band.

According to a fifth aspect of embodiments of the present disclosure, there is provided a network device, comprising:

According to a sixth aspect of the embodiments of the present disclosure, there is provided a terminal, including:

one or more processors;

wherein the terminal is configured to perform the method of any one of the first aspects.

According to a seventh aspect of embodiments of the present disclosure, there is provided a network device, including:

one or more processors;

wherein the terminal is configured to perform the method of any one of the second aspects.

According to an eighth aspect of an embodiment of the present disclosure, there is provided a communication system including:

a terminal configured to implement the frequency band switching method according to the first aspect, and a network device configured to implement the frequency band switching method according to the second aspect.

According to a ninth aspect of the embodiments of the present disclosure, a storage medium is presented, the storage medium storing instructions that, when run on a communication device, cause the communication device to perform the method of any one of the first or second aspects.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the disclosure, illustrate and explain the exemplary embodiments of the disclosure and together with the description serve to explain the embodiments of the disclosure and do not constitute an undue limitation on the embodiments of the disclosure. In the drawings:

Fig. 1 is a schematic architecture diagram of a communication system shown in accordance with an embodiment of the present disclosure;

fig. 2 is an interactive schematic diagram of a frequency band switching method according to an embodiment of the disclosure;

fig. 3A is a flowchart illustrating a frequency band switching method according to an embodiment of the present disclosure;

fig. 3B is a flowchart illustrating a frequency band switching method according to an embodiment of the disclosure;

fig. 4A is a flowchart illustrating a frequency band switching method according to an embodiment of the present disclosure;

fig. 4B is a flowchart illustrating a frequency band switching method according to an embodiment of the disclosure;

fig. 5 is a flowchart illustrating a frequency band switching method according to an embodiment of the present disclosure;

fig. 6 is a flowchart illustrating a frequency band switching method according to an embodiment of the present disclosure;

fig. 7A is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

fig. 7B is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

fig. 8A is a schematic structural diagram of a communication device according to an embodiment of the present disclosure;

fig. 8B is a schematic structural diagram of a chip according to an embodiment of the disclosure.

Detailed Description

The disclosure provides a frequency band switching method, a terminal and a storage medium.

In a first aspect, an embodiment of the present disclosure provides a method for switching a frequency band, where the method includes:

In the above embodiment, a scheme is provided for determining the position of the time length required by the terminal for performing the frequency band switching according to the first condition satisfied by the frequency band group, so that the position of the switching period positioning is determined under the condition that a plurality of frequency bands satisfy the first condition, the problem of fuzzy position of the determined switching period is solved, and the accuracy of determining the position of the switching period is ensured.

With reference to some embodiments of the first aspect, in some embodiments, the determining that the switching period is located in the first frequency band, the first condition includes at least one of:

the frequency band with the highest priority is the second frequency band in the frequency band group which is switched;

the frequency bands included in the frequency band group are frequency bands which are switched, and the frequency band with the highest priority in the frequency band group is the second frequency band.

In the above embodiment, according to the second frequency band with the highest priority included in the frequency band with the highest priority in the frequency band group, the switching period is determined to be located in the first frequency band, so as to ensure normal data transmission of the second frequency band with the highest priority, further ensure that the determined switching period is located in the first frequency band, and ensure accuracy of the switching period.

With reference to some embodiments of the first aspect, in some embodiments, the determining that the switching period is located in the second frequency band, the first condition includes at least one of:

the frequency band with the highest priority in the frequency band group which is switched is the first frequency band;

the frequency bands included in the frequency band group are frequency bands which are switched, and the frequency band with the highest priority in the frequency band group is the first frequency band.

In the above embodiment, according to the first frequency band with the highest priority included in the frequency band with the highest priority in the frequency band group, the switching period is determined to be located in the second frequency band, so as to ensure normal data transmission of the first frequency band with the highest priority, further ensure that the determined switching period is located in the second frequency band, and ensure accuracy of the switching period.

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

the frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band;

the frequency band with the highest priority in the frequency band group is the first frequency band and the second frequency band;

among the frequency bands related to switching in the frequency band group, the frequency band with the highest priority is the first frequency band and the second frequency band.

In the above embodiment, if the frequency band with the highest priority is both the first frequency band and the second frequency band, the switching period is determined to be located in the first frequency band or the second frequency band, that is, when the frequency band with the highest priority is determined to belong to two frequency bands, the switching period is designated to be located in one of the frequency bands, so as to ensure the accuracy of the determined switching period.

the frequency band with the lowest priority in the frequency band group is the first frequency band;

the frequency band with the lowest priority is the first frequency band in the frequency band group which is switched;

and the frequency band with the lowest priority in the frequency band groups related to switching is the first frequency band.

In the above embodiment, the switching period is determined to be located in the first frequency band according to the first frequency band with the lowest priority, so as to ensure the accuracy of the determined switching period, and further ensure the transmission reliability of the frequency band with the high priority.

The frequency band with the lowest priority in the frequency band group is the second frequency band;

the frequency band with the lowest priority is the second frequency band in the frequency band group which is switched;

and the frequency band with the lowest priority in the frequency band group related to the switching is the second frequency band.

In the above embodiment, the switching period is determined to be located in the second frequency band according to the second frequency band with the lowest priority, so as to ensure the accuracy of the determined switching period, and further ensure the transmission reliability of the frequency band with the high priority.

With reference to some embodiments of the first aspect, in some embodiments, the method further includes:

and receiving a first signaling sent by the network equipment, wherein the first signaling is used for configuring the first condition and determining the mode of the frequency band where the switching period is located.

In the above embodiment, the network device configures the first condition and the frequency band where the switching period is located through the first signaling, so as to ensure the accuracy of the determined position of the switching period.

With reference to some embodiments of the first aspect, in some embodiments, the first condition and a manner of determining a frequency band in which the switching period is located are agreed by a communication protocol.

In the above embodiment, the accuracy of the determined position of the switching period is ensured by the manner that the communication protocol agrees with the first condition and the frequency band where the switching period is located.

With reference to some embodiments of the first aspect, in some embodiments, the first frequency band is Switch-to-band, and the second frequency band is Switch-from band; or, the first frequency band is Switch-from band, and the first frequency band is Switch-to band.

With reference to some embodiments of the first aspect, in some embodiments, the Switch-to-band is used to indicate a band to which the next transmission is directed, and the Switch-from band is used to indicate a band to which the initial transmission is directed.

In a second aspect, an embodiment of the present disclosure provides a method for switching a frequency band, where the method is performed by a network device, and the method includes:

With reference to some embodiments of the first aspect, in some embodiments, the first condition includes at least one of:

and sending a first signaling, wherein the first signaling is used for configuring the first condition and determining the mode of the frequency band where the switching period is located.

In a third aspect, an embodiment of the present disclosure provides a method for switching a frequency band, where the method includes:

In a fourth aspect, an embodiment of the present disclosure provides a terminal, where the terminal includes at least one of a transceiver module and a processing module; wherein the terminal is configured to perform the optional implementation manners of the first aspect and the third aspect.

In a fifth aspect, embodiments of the present disclosure provide a network device, where the network device includes at least one of a transceiver module and a processing module; wherein the access network device is configured to perform the optional implementation manners of the second aspect and the third aspect.

In a sixth aspect, an embodiment of the present disclosure provides a terminal, including:

one or more processors;

wherein the terminal is configured to perform the method of any one of the first aspect and the third aspect.

In a seventh aspect, embodiments of the present disclosure provide a network device, including:

one or more processors;

wherein the network device is configured to perform the method of any one of the second and third aspects.

In an eighth aspect, an embodiment of the present disclosure provides a storage medium storing first information, which when run on a communication device, causes the communication device to perform the method according to any one of the first, second and third aspects.

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 the method according to any one of the first, second and third aspects.

In a tenth aspect, the presently disclosed embodiments propose a computer program which, when run on a communication device, causes the communication device to perform the method according to any of the first, second and third aspects.

In an eleventh aspect, embodiments of the present disclosure provide a chip or chip system. The chip or chip system comprises processing circuitry configured to perform the method of any of the first, second and third aspects.

It will be appreciated that the above-described terminal, storage medium, program product, computer program, chip or chip system are all adapted 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 frequency band switching method, a terminal, network equipment and a storage medium. In some embodiments, the terms of the frequency band switching method, the information switching method, the frequency band indication, the processing method, and the like may be replaced with each other, the terms of the communication device, the information processing device, the indication device, and the like may be replaced with each other, and the terms of the information processing system, the communication 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.

In some embodiments, "A, B at least one of", "a and/or B", "in one case a, in another case B", "in response to one case a", "in response to another case B", and the like, may include the following technical solutions according to circumstances: in some embodiments a (a is performed independently of B); b (B is performed independently of a) in some embodiments; in some embodiments, execution is selected from a and B (a and B are selectively executed); in some embodiments a and B (both a and B are performed). Similar to that described above when there are more branches such as A, B, C.

In some embodiments, the description modes such as "a or B" may include the following technical schemes according to circumstances: in some embodiments a (a is performed independently of B); b (B is performed independently of a) in some embodiments; in some embodiments execution is selected from a and B (a and B are selectively executed). 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 such as "time/frequency", "time-frequency domain", and the like refer to the time domain and/or the frequency domain.

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, the apparatuses and devices may be interpreted as entities, or may be interpreted as virtual, and the names thereof are not limited to those described in the embodiments, and may also be interpreted as "device (apparatus)", "device)", "circuit", "network element", "node", "function", "unit", "component (section)", "system", "network", "chip system", "entity", "body", and the like in some cases.

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

In some embodiments, the "access network device (access network device, AN device)" may also be referred to as a "radio access network device (radio access network device, RAN device)", "Base Station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", and in some embodiments may also be referred to as a "node)", "access point (access point)", "transmission point (transmission point, TP)", "Reception Point (RP)", "transmission and/or reception point (transmission/reception point), TRP)", "panel", "antenna array", "cell", "macrocell", "microcell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier (component carrier)", bandwidth part (BWP), etc.

In some embodiments, a "terminal" or "terminal device" may be referred to as a "user equipment" (terminal) "," user terminal "(MS)", "mobile station (MT)", subscriber station (subscriber station), mobile unit (mobile unit), subscriber unit (subscore 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 (mobile terminal), handheld device (handset), user agent (user), mobile client (client), client, etc.

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.

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.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present disclosure, and as shown in fig. 1, a method provided by an embodiment of the present disclosure may be applied to a communication system 100, which may include a terminal 101 and a network device 102. It should be noted that, the communication system 100 may further include other devices, and the disclosure is not limited to the devices included in the communication system 100.

In some embodiments, the terminal 101 includes at least one of a mobile phone (mobile phone), a wearable device, an internet of things device, a communication enabled car, a smart car, a tablet (Pad), a wireless transceiver enabled computer, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned (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 (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), for example, but is not limited thereto.

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

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

In some embodiments, the technical solutions of the present disclosure may be applied to an Open RAN architecture, where an access network device or an interface in an access network device according to the embodiments of the present disclosure may become an internal interface of the Open RAN, and flow and information interaction between these internal interfaces may be implemented by using software or a program.

In some embodiments, the access network device 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), and the structure of the CU-DU may be used to split the protocol layers of the access network device, where functions of part of the protocol layers are centrally controlled by the CU, and functions of the rest of all the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU, but is not limited thereto.

In some embodiments, the core network device may be a device, including one or more network elements, or may be a plurality of devices or a device group, including all or part of one or more network elements. The network element may be virtual or physical. The core network comprises, for example, at least one of an evolved packet core (Evolved Packet Core, EPC), a 5G core network (5G Core Network,5GCN), a next generation core (Next Generation Core, NGC).

It may be understood that, the communication system described in the embodiments of the present disclosure is for more clearly describing the technical solutions of the embodiments of the present disclosure, and is not limited to the technical solutions provided 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 solutions provided in the embodiments of the present disclosure are applicable to similar technical problems.

The embodiments of the present disclosure described below may be applied to the communication system 100 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 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 may be arbitrary, and the respective bodies may be physical or virtual, and the connection relationship between the respective bodies is examples, and the respective bodies may not be connected or may be connected, and the connection may be arbitrary, direct connection or indirect connection, or wired connection or wireless connection.

Embodiments of the present disclosure may be applied to long term evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER 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 New air interface (New Radio, NR), future Radio access (Future Radio Access, FRA), new Radio access technology (New-Radio Access Technology, RAT), new Radio (New Radio, NR), new Radio access (New Radio access, NX), future generation Radio 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 (UWB), bluetooth (Bl terminal lug (registered trademark)), land public mobile communication network (Public Land Mobile Network, PLMN) network, device-to-Device (D2D) system, machine-to-machine (Machine to Machine, M2M) system, internet of things (Internet of Things, ioT) system, internet of vehicles (V2X), system utilizing other frequency band switching methods, next generation system extended based on them, and the like. In addition, a plurality of system combinations (e.g., LTE or a combination of LTE-a and 5G, etc.) may be applied.

In some embodiments, the terminals in the present disclosure operate in the FR1 or FR2 frequency bands. Alternatively, the low frequency FR1 band may have a more fragmented available spectrum, and the available bandwidth may be generally narrower and more suitable for inter-band multicarrier operation. For the FR2 band and part of the FR1 band, the available spectrum may be wider and thus more suitable for in-band multicarrier. In order to meet the requirements of different application scenes and ensure that scattered spectrum and wide spectrum can be applied efficiently, the enhancement of uplink multi-carrier needs to be considered.

In some embodiments, the terminal in the present disclosure supports at most two uplink antennas, that is, the terminal can operate in at most two frequency bands. Alternatively, the terminal may configure more than two uplink frequency bands, so as to support the two uplink antennas to switch in more than 2 uplink frequency bands. For example, the terminal switches from band 1 and band 2 to band 3 and band 4. For another example, the terminal switches from both band 1 and band 2 to band 3. For another example, the terminal switches from band 1 and band 2 to band 3 and band 4, etc.

In some embodiments, the present disclosure proposes two band types. Alternatively, the two types include Switch-from band and Switch-to band. Wherein Switch-from band is used to indicate the band to which the initial transmission is directed. Switch-to band is used to indicate the band to which the next transmission is directed.

In some embodiments, the present disclosure proposes a scheme of configuring a priority list for all frequency bands, where the higher the priority, the more preferentially the transmission is guaranteed not to be interrupted. That is, when the terminal performs the band switching, the switching period should be positioned on the low-priority band.

Alternatively, when the highest priority band is Switch-to-band, then the switching cycle is located on Switch-from band; when the highest priority band is Switch-from band, then the switching cycle is located on Switch-to band.

In the related art, if the frequency band with the highest priority is both Switch-to-band and Switch-from-band, the problem that the switching period is not determined by the priority of granu will occur, and in order to solve this problem, the present disclosure proposes an embodiment shown in fig. 2 to solve the above problem.

Fig. 2 is an interactive schematic diagram of a frequency band switching method according to an embodiment of the disclosure. As shown in fig. 2, an embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

in step S2101, the network device sends a first signaling.

In some embodiments, a terminal receives a first signaling. Alternatively, it may be understood that the terminal receives the first signaling sent by the network device.

In some embodiments, the network device sends a first signaling to the terminal.

In some embodiments, the first signaling is used to configure a first condition and determine a manner in which the frequency band of the switching period is located. In some embodiments, the first signaling is used to configure the first condition and the manner in which the switching period is determined. In some embodiments, the first signaling is used to configure a first condition and a manner of determining a frequency band in which a length required for performing a frequency band switching is located. In some embodiments, the first signaling is used to configure a manner of determining a frequency band in which the switching period is located when the first condition is satisfied.

In some embodiments, the first condition refers to that the priority relation of the frequency bands included in the frequency band group and the type of the frequency band satisfy the condition. In some embodiments, the first condition refers to a type to which the frequency bands of different priorities included in the frequency band group belong. In some embodiments, the first condition refers to a priority of different types of frequency bands in the group of frequency bands.

In some embodiments, the band group includes a plurality of bands. For example, the band group includes band 1, band 2, band 3, and band 4. In some embodiments, each frequency band corresponds to a priority.

In some embodiments, the name of the first condition in the present disclosure is not limited. For example, a handover condition, a judgment condition, a cycle condition, a positioning condition, and the like.

In some embodiments, band switching refers to a terminal switching from one band to another. Or, the frequency band switching refers to that the antenna of the terminal is switched from one frequency band to another frequency band. Optionally, the frequency band switching refers to uplink frequency band switching. For another example, it refers to an uplink handover.

In some embodiments, the present disclosure does not limit the name of the band switch. For example, transmission link switching, antenna switching, uplink switching, etc.

In some embodiments, the priority of the frequency band is indicated by a priority list. For example, the priority list includes a frequency band and a priority corresponding to the frequency band. Wherein, each frequency band is in one-to-one correspondence with the priority. For another example, the priority list includes frequency bands, and the priority of the frequency bands in the order from top to bottom of the priority list is sequentially decreased.

In some embodiments, the first signaling is RRC (Radio Resource Control ), MAC CE (Media Access Control Control Element, medium access control element), DCI (Downlink Control Information ), and the like.

In some embodiments, the name of the first signaling is not limited. Which is for example a configuration instruction, first information, etc.

In step S2102, the terminal determines a manner of determining a frequency band in which the switching period is located according to the first condition.

In the embodiment of the present disclosure, when the terminal receives the first signaling, the first condition indicated and the manner of determining the frequency band where the switching period is located may be determined according to the first signaling.

In step S2103, the network device sends second signaling.

In some embodiments, the terminal receives the second signaling. Alternatively, it is also understood that the terminal receives the second signaling sent by the network device.

In some embodiments, the network device sends the second signaling to the terminal.

In some embodiments, the second signaling is used to instruct the terminal to perform a frequency band switch. In some embodiments, the second signaling is used to instruct the terminal to switch from one frequency band to another frequency band.

Step S2104; the terminal determines that the frequency band group meets a first condition based on the second signaling, and determines that the switching period is positioned in the first frequency band or the second frequency band.

In some embodiments, the band group includes a plurality of bands. In some embodiments, the switching period is used to instruct the terminal about the duration required for the frequency band switching. Wherein the first frequency band is different from the second frequency band.

In some embodiments, the name of the switching period is not limited. Such as the duration of the handover, the time delay of the handover, etc.

In the embodiment of the disclosure, if the terminal determines that the frequency band group meets the first condition, the terminal determines that the switching period is positioned in the first frequency band. Or if the terminal determines that the frequency band group meets the first condition, determining that the switching period is positioned in the second frequency band.

In some embodiments, positioning the switching period in the first frequency band means that the switching period is within a duration of operation in the first frequency band. In other embodiments, the positioning of the switching period in the first frequency band means that the switching period belongs to the working duration of the first frequency band.

In some embodiments, the positioning of the switching period in the second frequency band means that the switching period is within a duration of operation in the second frequency band. In other embodiments, the positioning of the switching period in the second frequency band means that the switching period belongs to the working duration of the second frequency band.

In some embodiments, the first frequency band and the second frequency band refer to types of frequency bands. Alternatively, the first frequency band may also be referred to as a first frequency band type. The second frequency band may also be referred to as a second frequency band type.

In some embodiments, the first frequency band is Switch-to-band and the second frequency band is Switch-from band; or, the first frequency band is Switch-from band, and the first frequency band is Switch-to band.

In some embodiments, switch-to-band is used to indicate the band to which the next transmission is directed, and Switch-from band is used to indicate the band to which the initial transmission is directed.

Next, a description will be given of how the terminal determines the frequency band in which the switching period is located.

First kind: in some embodiments, if it is determined that the switching period is located in the first frequency band, the first condition includes at least one of:

(1) And the frequency band with the highest priority among the frequency bands in the frequency band group is the second frequency band.

In the embodiment of the disclosure, the frequency band group includes a plurality of frequency bands, wherein there are frequency bands that are switched, there are frequency bands that are not switched, the frequency band that is switched in the frequency band group is determined, and if the frequency band with the highest priority in the frequency band that is switched is the second frequency band, the switching period is determined to be positioned in the first frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so band 2 and band 3 are the bands with the highest priority, and the band with the highest priority is determined from band 2 and band 3, and if the band is the second band, the switching period is determined to be located in the first band.

(2) The frequency bands included in the frequency band group are the frequency bands which are switched, and the frequency band with the highest priority in the frequency band group is the second frequency band.

In the embodiment of the present disclosure, the frequency band group includes a frequency band that is switched, and if the frequency band with the highest priority in the frequency band that is switched is the second frequency band, it is determined that the switching period is located in the first frequency band.

For example, if the band group includes band 2 and band 3, where band 2 and band 3 are bands where switching occurs, the band with the highest priority is determined from band 2 and band 3, and if the band is the second band, it is determined that the switching period is located in the first band.

It should be noted that, both the above cases are performed in the case where the frequency band with the highest priority in the frequency band group is both the first frequency band and the second frequency band. In some embodiments, the frequency band with the highest priority in the frequency band group is the frequency band where no handoff occurs. For example, if the band group includes band 1, band 2, band 3 and band 4, where band 1 is the band with the highest priority, and the terminal is switched from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, and band 2 is switched to band 3.

In some embodiments, if the terminal determines that the band group satisfies at least one of the first conditions described above, it determines that the switching period is located in the first band.

In some embodiments, the above scheme may be described as:

for uplink handover, the terminal determines the frequency band of the handover cycle position according to the configuration priority of the frequency band involved in the actual Tx handover in the uplink handover, wherein the priority of each frequency band is provided by higher layer parameters. The switching period being at any one position

-if the highest priority band is the switch-to-band, then the switch-from band, or

-the switch-to-band if the highest priority band is the switch-from band.

(For an uplink switch the UE determines the band of the switching period location based on the configured priority of the bands which involved the actual Tx switching in the uplink switch,where the priority per band is provided by the higher layer parameter.The switch is located on either

-the switch-from band(s)if the highest priority band is a switch-to band,or

-the switch-to band(s)if the highest priority band is a switch-from band.)

In some embodiments, the above scheme may be described as:

for uplink handover, the terminal determines the frequency band where the handover cycle position is located according to the configured frequency band priorities, wherein the priority of each frequency band is provided by higher layer parameters. The switching period is located at any one position.

-if in the uplink handover the highest priority band involved in the actual Tx handover is switch-to-band, the switch-from band

-if in the uplink handover the highest priority band related to the actual Tx switch is switch-from band, the switch-to band.

(For an uplink switch the UE determines the band of the switching period location based on the configured priority of the bands,where the priority per band is provided by the higher layer parameter.The switch is located on either

-the switch-from band(s)if the highest priority band which involved the actual Tx switching in the uplink switch is a switch-to band,or

-the switch-to band(s)if the highest priority band which involved the actual Tx switching in the uplink switch is a switch-from band.)

Second kind: in some embodiments, determining that the switching period is located in the second frequency band, the first condition includes at least one of:

(1) And the frequency band with the highest priority among the frequency bands which are switched in the frequency band group is the first frequency band.

In the embodiment of the disclosure, the frequency band group includes a plurality of frequency bands, wherein there are frequency bands that are switched, there are frequency bands that are not switched, the frequency band that is switched in the frequency band group is determined, and if the frequency band with the highest priority in the frequency band that is switched is the first frequency band, the switching period is determined to be positioned in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so band 2 and band 3 are the bands with the highest priority, and the band with the highest priority is determined from band 2 and band 3, and if the band is the first band, the switching period is determined to be located in the second band.

(2) The frequency bands included in the frequency band group are the frequency bands which are switched, and the frequency band with the highest priority in the frequency band group is the first frequency band.

In the embodiment of the present disclosure, the frequency band group includes a frequency band that is switched, and if the frequency band with the highest priority in the frequency band that is switched is the first frequency band, it is determined that the switching period is located in the second frequency band.

For example, if the band group includes band 2 and band 3, where band 2 and band 3 are bands where switching occurs, the band with the highest priority is determined from band 2 and band 3, and if the band is the first band, it is determined that the switching period is located in the second band.

In some embodiments, if the terminal determines that the band group satisfies at least one of the first conditions described above, it determines that the switching period is located in the second band.

In some embodiments, the above scheme may be described as:

-the switch-to-band if the highest priority band is the switch-from band.

-the switch-from band(s)if the highest priority band is a switch-to band,or

-the switch-to band(s)if the highest priority band is a switch-from band.)

In some embodiments, the above scheme may be described as:

Third kind: in some embodiments, the first condition comprises at least one of:

(1) The frequency band with the highest priority in the frequency band group is the first frequency band and the second frequency band.

In the embodiment of the present disclosure, if the frequency band with the highest priority in the frequency band group is not only the first frequency band but also the second frequency band, it is determined that the switching period is located in the first frequency band. Or if the frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, determining that the switching period is positioned in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the band with the highest priority is determined from the band 1, band 2, band 3 and band 4, and if the band is not the first band but the second band, the switching period is determined to be located in the first band or the second band.

(2) Among the frequency bands which are switched in the frequency band group, the frequency band with the highest priority is the first frequency band and the second frequency band.

In the embodiment of the present disclosure, if the frequency band with the highest priority is the first frequency band and is also the second frequency band in the frequency band group, the switching period is determined to be positioned in the first frequency band. Or if the frequency band with the highest priority is the first frequency band and is also the second frequency band in the frequency band group, determining that the switching period is positioned in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, and the terminal is switched from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so band 2 and band 3 are the bands with the highest priority, and the band with the highest priority is determined from band 2 and band 3, and if the band is not the first band but the second band, the switching period is determined to be located in the first band or the second band.

(3) Among the frequency bands related to switching in the frequency band group, the frequency band with the highest priority is the first frequency band and the second frequency band.

In the embodiment of the present disclosure, if a frequency band with the highest priority among the frequency bands related to switching in the frequency band group is both the first frequency band and the second frequency band, it is determined that the switching period is located in the first frequency band. Or if the frequency band with the highest priority in the frequency band group related to the switching is not only the first frequency band but also the second frequency band, determining that the switching period is positioned in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, and band 2 is switched to band 3, so that band 1, band 2 and band 3 all involve switching, and the band with the highest priority is determined from band 1, band 2 and band 3, and if the band is not only the first band but also the second band, it is determined that the switching period is located in the first band or the second band.

In some embodiments, if the terminal determines that the band group satisfies at least one of the first conditions, it determines that the switching period is located in the first band or the second band.

In some embodiments, the above scheme may be described as:

-if the highest priority band involved in the handover is the switch-to-band, then the switch-from band, or

-the switch-to-band if the highest priority band involved in the switch is the switch-from band.

If the switch-from band and the switch-to band involved in the switch are both highest priority bands, then the switch cycle is located on the switch-from band.

-the switch-from band(s)if the highest priority band involved in the switching is a switch-to band,or

-the switch-to band(s)if the highest priority band involved in the switching is a switch-from band.

If the highest priority band is involved in both the switching switched-from band(s)and switch-to band(s),the switch is located on the switch-from band(s).)

In some embodiments, the above scheme may be described as:

If the switch-from band and the switch-to band involved in the switch are both highest priority bands, then the switch cycle is located on the switch-to band.

-the switch-to band(s)if the highest priority band involved in the switching is a switch-from band.]

If the highest priority band is involved in both the switching switched-from band(s)and switch-to band(s),the switch is located on the switch-to band(s).)

Fourth kind: in some embodiments, determining that the switching period is located at the first frequency band, the first condition includes at least one of:

(1) The frequency band with the lowest priority in the frequency band group is the first frequency band.

In the embodiment of the present disclosure, if the frequency band with the lowest priority in the frequency band group is the first frequency band, it is determined that the switching period is located in the first frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the band with the lowest priority is determined from the band 1, band 2, band 3 and band 4, and if the band is the first band, the switching period is determined to be located in the first band.

(2) And among the frequency bands which are switched in the frequency band group, the frequency band with the lowest priority is the first frequency band.

In the embodiment of the present disclosure, if a frequency band with the lowest priority among the frequency bands that are switched in the frequency band group is a first frequency band, it is determined that the switching period is located in the first frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so band 2 and band 3 are the bands with the lowest priority, and the band with the lowest priority is determined from band 2 and band 3, and if the band is the first band, the switching period is determined to be located in the first band.

(3) Among the frequency bands related to switching in the frequency band group, the frequency band with the lowest priority is the first frequency band.

In the embodiment of the present disclosure, if a frequency band with the lowest priority among the frequency bands related to switching in the frequency band group is a first frequency band, it is determined that the switching period is located in the first frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so that all of band 1, band 2 and band 3 involve switching, the band with the lowest priority is determined from band 1, band 2 and band 3, and if the band is the first band, the switching period is determined to be located in the first band.

Fifth: in some embodiments, determining that the switching period is located in the second frequency band, the first condition includes at least one of:

(1) The frequency band with the lowest priority in the frequency band group is the second frequency band.

In the embodiment of the present disclosure, if the frequency band with the lowest priority in the frequency band group is the second frequency band, it is determined that the switching period is located in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the band with the lowest priority is determined from the band 1, band 2, band 3 and band 4, and if the band is the second band, the switching period is determined to be located in the second band.

(2) And the frequency band with the lowest priority among the frequency bands which are switched in the frequency band group is the second frequency band.

In the embodiment of the present disclosure, if the frequency band with the lowest priority among the frequency bands in the frequency band group that are switched is the second frequency band, the switching period is determined to be located in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so band 2 and band 3 are the bands with the lowest priority, and the band with the lowest priority is determined from band 2 and band 3, and if the band is the second band, the switching period is determined to be located in the second band.

(3) And the frequency band with the lowest priority in the frequency band group related to the switching is the second frequency band.

In the embodiment of the present disclosure, if a frequency band with the lowest priority among the frequency bands related to switching in the frequency band group is a second frequency band, determining that the switching period is located in the second frequency band.

For example, if the band group includes band 1, band 2, band 3 and band 4, the terminal switches from band 1, band 2 to band 1 and band 3, it can be seen that band 1 is not switched, band 2 is switched to band 3, so that all of band 1, band 2 and band 3 involve switching, the band with the lowest priority is determined from band 1, band 2 and band 3, and if the band is the second band, the switching period is determined to be located in the second band.

It should be noted that, in the embodiments of the present disclosure, the above five schemes may be arbitrarily combined to form a new scheme, for example, a third and a fourth are combined, a third and a fifth are combined, a third, a fourth and a fifth are combined, a first and a third are combined, a second and a third are combined, a first, a second and a third are combined, and so on. Further, it is noted that when a regimen is combined, the first condition includes all conditions of the combined regimen.

In some embodiments, the fourth and third schemes may be combined, for example:

determining that the switching period is located in the first frequency band, the first condition includes at least one of:

(1) The frequency band with the highest priority in the frequency band group is the first frequency band, and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the first frequency band.

(2) The frequency band with the highest priority in the frequency band group is not only the first frequency band, but also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the first frequency band.

(3) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group related to switching is the first frequency band.

(4) The frequency band with the highest priority in the frequency band group is the first frequency band, and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the first frequency band.

(5) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the first frequency band.

(6) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group related to the switching is the first frequency band.

(7) Among the frequency bands related to switching in the frequency band group, the frequency band with the highest priority is the first frequency band, and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the first frequency band.

(8) The frequency band with highest priority in the frequency band group related to the switching is not only the first frequency band, but also the second frequency band, and the frequency band with lowest priority in the frequency band group subjected to the switching is the first frequency band.

(9) The frequency band with the highest priority in the frequency band group related to the switching is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group related to the switching is the first frequency band.

In some embodiments, the fifth and third schemes may be combined, for example:

determining that the switching period is located in the second frequency band, the first condition includes at least one of:

(1) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the second frequency band.

(2) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the second frequency band.

(3) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group related to switching is the second frequency band.

(4) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the second frequency band.

(5) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the second frequency band.

(6) The frequency band with highest priority in the frequency band group is the first frequency band and is also the second frequency band, and the frequency band with lowest priority in the frequency band group related to the switching is the second frequency band.

(7) Among the frequency bands related to switching in the frequency band group, the frequency band with the highest priority is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group is the second frequency band.

(8) The frequency band with highest priority in the frequency band group related to the switching is not only the first frequency band, but also the second frequency band, and the frequency band with lowest priority in the frequency band group subjected to the switching is the second frequency band.

(9) The frequency band with the highest priority in the frequency band group related to the switching is the first frequency band and is also the second frequency band, and the frequency band with the lowest priority in the frequency band group related to the switching is the second frequency band.

In some embodiments, the above scheme may be described as:

If the switch-from band and the switch-to band involved in the handover are both highest priority bands, the handover period is located on one of the bands.

-if the lowest priority band involved in the switch is the switch-from band, then the switch-from band, or

-the switch-from band if the lowest priority band involved in the switch is the switch-from band.

If the highest priority band is involved in both the switching switched-from band(s)and switch-to band(s),the switch is located on either

-the switch-from band(s)if the lowest priority band involved in the switching is a switch-from band,or

-the switch-to band(s)if the lowest priority band involved in the switching is a switch-to band.)

It should be noted that, in either the first combination or the second combination, it is understood that, in the case of determining that the frequency band with the highest priority is the first frequency band or the second frequency band, the frequency band with the lowest priority needs to be further considered, so as to determine the frequency band located by the switching period.

In some embodiments, the first scheme, the second scheme, the third scheme may be combined, for example:

(1) The frequency band with the highest priority in the frequency band group is not only the first frequency band, but also the second frequency band, in addition, the frequency band with the highest priority in the frequency band group is the second frequency band, and the switching period is determined to be positioned in the first frequency band.

(2) The frequency band with the highest priority in the frequency band group is not only the first frequency band, but also the second frequency band, in addition, the frequency band with the highest priority in the frequency band group is the first frequency band, and the switching period is determined to be positioned in the second frequency band.

(3) The frequency band with the highest priority in the frequency band group is not only the first frequency band, but also the second frequency band, in addition, the frequency band included in the frequency band group is the frequency band with the switching, and the frequency band with the highest priority in the frequency band group is the second frequency band.

(4) The frequency band with the highest priority in the frequency band group is not only the first frequency band, but also the second frequency band, in addition, the frequency band included in the frequency band group is the frequency band with the switching, and the frequency band with the highest priority in the frequency band group is the first frequency band.

(5) And in the frequency bands which are switched in the frequency band group, the frequency band with the highest priority is the first frequency band and is also the second frequency band, in addition, in the frequency bands which are switched in the frequency band group, the frequency band with the highest priority is the second frequency band, and the switching period is determined to be positioned in the first frequency band.

(6) And in the frequency bands which are switched in the frequency band group, the frequency band with the highest priority is the first frequency band and is also the second frequency band, and in the frequency bands which are switched in the frequency band group, the frequency band with the highest priority is the first frequency band, and the switching period is determined to be positioned in the second frequency band.

(7) The frequency band with the highest priority in the frequency band group is the first frequency band and the second frequency band, in addition, the frequency band included in the frequency band group is the frequency band with the highest priority in the frequency band group is the second frequency band.

(8) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, in addition, the frequency band included in the frequency band group is the frequency band with the highest priority in the frequency band group is the first frequency band.

(9) The frequency band with the highest priority in the frequency band group is the first frequency band and is also the second frequency band, and in addition, the frequency band with the highest priority in the frequency band group is the second frequency band, so that the switching period is determined to be positioned in the first frequency band.

(10) The frequency band with the highest priority in the frequency band group is the first frequency band and the second frequency band, and in addition, the frequency band with the highest priority in the frequency band group is the first frequency band, so that the switching period is determined to be positioned in the second frequency band.

(11) The frequency band with the highest priority in the frequency band group is the first frequency band and the second frequency band, in addition, the frequency band included in the frequency band group is the frequency band with the switching, and the frequency band with the highest priority in the frequency band group is the second frequency band.

(12) The frequency band with the highest priority in the frequency band group is the first frequency band and the second frequency band, in addition, the frequency band included in the frequency band group is the frequency band with the switching, and the frequency band with the highest priority in the frequency band group is the first frequency band.

It should be noted that, the embodiments of the present disclosure are described taking the indication of the network device as an example. In yet another embodiment, the first condition and the manner in which the frequency band in which the switching period is located are determined are agreed upon by the communication protocol.

In the embodiment of the present disclosure, the terminal execution step S2104 is taken as an example for explanation. In another embodiment, the network device also performs step S2104, which is not described in detail in the embodiments of the present disclosure.

Step S2105: the terminal performs frequency band switching based on the switching period.

In the embodiment of the disclosure, after determining the position of the switching period, the terminal can perform the frequency band switching according to the switching period.

In some embodiments, the names of information and the like are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "instruction", "command", "channel", "parameter", "field", "symbol", "codebook", "code word", "code point", "bit", "data", "program", "chip", and the like may be replaced with each other.

In some embodiments, terms such as "uplink," "physical uplink," and the like may be interchanged, terms such as "downlink," "physical downlink," and the like may be interchanged, terms such as "side," "side link," "side communication," "side link," "direct link," and the like may be interchanged.

In some embodiments, "acquire," "obtain," "receive," "transmit," "bi-directional transmit," "send and/or receive" may be used interchangeably and may be interpreted as receiving from other principals, acquiring from protocols, acquiring from higher layers, processing itself, autonomous implementation, etc.

In some embodiments, terms such as "send," "transmit," "report," "send," "transmit," "bi-directional," "send and/or receive," and the like may be used interchangeably.

In some embodiments, terms such as "time of day," "point of time," "time location," and the like may be interchanged, and terms such as "duration," "period," "time window," "time," and the like may be interchanged.

In some embodiments, terms such as "specific (specific)", "predetermined", "preset", "set", "indicated", "certain", "arbitrary", "first", and the like may be replaced with each other, and "specific a", "predetermined a", "preset a", "set a", "indicated a", "certain a", "arbitrary a", "first a" may be interpreted as a predetermined in a protocol or the like, may be interpreted as a obtained by setting, configuring, or indicating, or the like, may be interpreted as specific a, certain a, arbitrary a, or first a, or the like, but are not limited thereto.

The frequency band switching method according to the embodiment of the present disclosure may include at least one of step S2101 to step S2105. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, step S2104 may be implemented as an independent embodiment, step S2105 may be implemented as an independent embodiment, step S2101 and step S2102 may be implemented as an independent embodiment, step S2103, step S2104, step S2105 may be implemented as an independent embodiment, step S2101, step S2102, step S2103, step S2104, step S2105 may be implemented as an independent embodiment, but is not limited thereto.

In some embodiments, step S2102, step S2103, step S2104, step S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S2101, step S2103, step S2104, step S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S2101, step S2102, step S2104, step S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, steps S2101, S2102, S2103, S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, steps S2101, S2102, S2103, S2104 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S2103, step S2104, step S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, steps S2101, S2102 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, reference may be made to alternative implementations described before or after the description corresponding to fig. 2.

Fig. 3A is a flowchart of a frequency band switching method according to an embodiment of the present disclosure, which is applied to a terminal. As shown in fig. 3A, an embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

in step S3101, the terminal determines a manner of determining a frequency band in which the switching period is located according to the first condition.

Alternative implementations of step S3101 may refer to alternative implementations of step S2102 in fig. 2, and other relevant parts in the embodiment related to fig. 2, which are not described herein.

In step S3102, the terminal determines, based on the second signaling, that the frequency band group satisfies the first condition, and determines that the switching period is located in the first frequency band or the second frequency band.

Alternative implementations of step S3102 may refer to alternative implementations of step S2104 of fig. 2, and other relevant parts of the embodiment related to fig. 2, which are not described herein.

In step S3103, the terminal performs band switching based on the switching period.

Alternative implementations of step S3103 may refer to alternative implementations of step S2105 of fig. 2, and other relevant parts of the embodiment related to fig. 2, which are not described herein.

The frequency band switching method according to the embodiment of the present disclosure may include at least one of step S3101 to step S3103. For example, step S3101 may be implemented as a separate embodiment, step S3102 may be implemented as a separate embodiment, step S3103 may be implemented as a separate embodiment, or at least two steps may be combined, but is not limited thereto.

In some embodiments, step S3101 is optional, step S3103 is optional, step S3102 is optional, step S3101 is optional, step S3102, step S3103 are optional, step S3101, step S3103 are optional, and one or more of these steps may be omitted or replaced in different embodiments. But is not limited thereto.

Fig. 3B is a flowchart of a frequency band switching method according to an embodiment of the present disclosure, which is applied to a terminal. As shown in fig. 3B, an embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

in step S3201, the terminal determines, based on the second signaling, that the frequency band group satisfies the first condition, and determines that the switching period is located in the first frequency band or the second frequency band.

Alternative implementations of step S3201 may refer to step S2104 of fig. 2, step S3102 of fig. 3A, and other relevant parts in the embodiments related to fig. 2 and 3A, which are not described herein.

Fig. 4A is a flowchart of a frequency band switching method according to an embodiment of the present disclosure, which is applied to a network device, and as shown in fig. 4A, the embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

in step S4101, the network device sends first signaling.

Alternative implementations of step S4101 may refer to step S2101 of fig. 2 and other relevant parts in the embodiment related to fig. 2, which are not described herein.

In some embodiments, the terminal receives the first signaling sent by the network device, but is not limited thereto, and may also receive the first signaling sent by other bodies.

In some embodiments, the terminal obtains first signaling specified by the protocol.

In some embodiments, the terminal obtains the first signaling from a higher layer.

In some embodiments, the terminal processes to obtain the first signaling.

In some embodiments, step S4101 is omitted, and the terminal autonomously implements the function indicated by the first signaling, or the above-described function is default or default.

In step S4102, the network device sends second signaling.

Alternative implementations of step S4102 may refer to step S2103 of fig. 2 and other relevant parts in the embodiment related to fig. 2, which are not described here again.

In step S4103, the network device determines, based on the second signaling, that the band group satisfies the first condition, and determines that the switching period is located in the first band or the second band.

Alternative implementations of step S4103 may refer to step S2104 of fig. 2 and other relevant parts in the embodiment related to fig. 2, which are not described herein.

The frequency band switching method according to the embodiment of the present disclosure may include at least one of step S4101 to step S4103. For example, step S4101 may be implemented as a separate embodiment, step S4102 may be implemented as a separate embodiment, and step S4103 may be implemented as a separate embodiment, but is not limited thereto.

In some embodiments, step S4101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S4102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S4103 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

Fig. 4B is a flowchart of a frequency band switching method according to an embodiment of the present disclosure, which is applied to a network device, and as shown in fig. 4B, the embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

in step S4201, the network device determines, based on the second signaling, that the band group satisfies the first condition, and determines that the switching period is located in the first band or the second band.

Alternative implementations of step S4201 may refer to step S2104 of fig. 2, step S4103 of fig. 4A, and other relevant parts of the embodiments related to fig. 2 and 4, which are not described herein.

Fig. 5 is a flowchart of a frequency band switching method according to an embodiment of the present disclosure, and as shown in fig. 5, the embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

step S5101: the method comprises the steps that a network device frequency band group meets a first condition, a switching period is determined to be positioned in a first frequency band or a second frequency band, the frequency band group comprises a plurality of frequency bands, the switching period is used for indicating duration required by a terminal for switching the frequency bands, and the first frequency band is different from the second frequency band.

Step S5102: the terminal frequency band group meets a first condition, a switching period is determined to be positioned in a first frequency band or a second frequency band, the frequency band group comprises a plurality of frequency bands, the switching period is used for indicating the duration required by the terminal for switching the frequency bands, and the first frequency band is different from the second frequency band.

Alternative implementations of step S5101 may refer to step S2104 of fig. 2, step S4103 of fig. 4A, and other relevant parts in the embodiments related to fig. 2 and 4A, which are not described herein.

Alternative implementations of step S5102 may refer to step S2104 of fig. 2, step S3102 of fig. 3A, and other relevant parts in the embodiments related to fig. 2 and 3A, which are not described herein.

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

Fig. 6 is a flowchart of a frequency band switching method according to an embodiment of the present disclosure, and as shown in fig. 6, the embodiment of the present disclosure relates to a frequency band switching method, where the method includes:

in step S6101, for an uplink handover, the terminal determines the handover cycle location according to the priority of the first band group, where the priority of the first band group is configured by the base station through the higher layer signaling.

In some embodiments, the solution to the handover period ambiguity problem includes at least one of:

first kind:

the condition for the switching cycle to be located at the switch-to-band includes at least one of:

among the bands in the first band group where Tx handover occurs, the highest priority band is switch-from band;

the first band group includes only bands where Tx handoff occurs, and the highest priority band in the first band group is switch-from band.

The condition for the switching cycle to be located at the switch-from band includes at least one of:

among the bands in the first band group where the Tx handover occurs, the highest priority band is switch-to-band;

the first band group includes only the bands where the Tx handoff occurs, and the highest priority band in the first band group is the switch-to-band.

Implementation 1:

For an uplink switch the UE determines the band of the switching period location based on the configured priority of the bands which involved the actual Tx switching in the uplink switch,where the priority per band is provided by the higher layer parameter.The switch is located on either

-the switch-from band(s)if the highest priority band is a switch-to band,or

-the switch-to band(s)if the highest priority band is a switch-from band.

implementation 2:

For an uplink switch the UE determines the band of the switching period location based on the configured priority of the bands,where the priority per band is provided by the higher layer parameter.The switch is located on either

-the switch-to band(s)if the highest priority band which involved the actual Tx switching in the uplink switch is a switch-from band.

second kind:

in the first band group, the highest priority band is either switch-from band or switch-to band;

among the bands in the first band group where the Tx handover occurs, the highest priority band is both switch-from band and switch-to band;

among the bands related to handover in the first band group, the highest priority band is both switch-from band and switch-to band;

in the first band group, the lowest priority band is switch-to band;

among the bands in the first band group where the Tx handover occurs, the lowest priority band is switch-to-band;

among the bands of the first band group that involve handover, the lowest priority band is switch-to-band.

In the first band group, the lowest priority band is switch-from band;

among the bands in the first band group where Tx handover occurs, the lowest priority band is switch-from band;

of the bands in the first band group that involve handover, the lowest priority band is switch-from band.

Implementation 1:

-For an uplink switch the UE determines the band of the switching period location based on the configured priority of the bands,where the priority per band is provided by the higher layer parameter.The switch is located on either

-the switch-to band(s)if the lowest priority band involved in the switching is a switch-to band.

third kind:

among the bands in the first band group where Tx handover occurs, the highest priority band is both switch-from band and switch-to band.

Among the bands in the first band group that involve handover, the highest priority band is both switch-from band and switch-to band.

Implementation 1:

If the highest priority band is involved in both the switching switched-from band(s)and switch-to band(s),the switch is located on the switch-from band(s).

Implementation 2:

If the highest priority band is involved in both the switching switched-from band(s)and switch-to band(s),the switch is located on the switch-to band(s).

fourth kind:

based on a first signaling configuration sent by the base station, the first signaling configuration is used for indicating a band in which the switching period is located when at least one of the following conditions occurs. At least one of the following conditions includes:

Implementation 1:

If the highest priority band is involved in both the switching switched-from band(s)and switch-to band(s),the switch is located on the band based on the first higher layer parameter.

in the embodiments of the present disclosure, some or all of the steps and alternative implementations thereof may be arbitrarily combined with some or all of the steps in other embodiments, and may also be arbitrarily combined with alternative implementations of other embodiments.

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. 7A is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. As shown in fig. 7A, the terminal 7100 may include: at least one of a transceiver module 7101, a processing module 7102, and the like. In some embodiments, the processing module 7102 is configured to determine that a frequency band group meets a first condition, and determine that a switching period is located in a first frequency band or a second frequency band, where the frequency band group includes a plurality of frequency bands, and the switching period is used to instruct a terminal to perform a duration required for switching the frequency bands, where the first frequency band is different from the second frequency band. Optionally, the transceiver module is configured to perform at least one of the communication steps of sending and/or receiving performed by the terminal 7100 in any of the above methods, which is not described herein. Optionally, the processing module is configured to perform at least one of the other steps performed by the terminal 7100 in any of the above methods, which is not described herein.

Optionally, the processing module 7102 is configured to perform at least one of the communication steps such as the processing performed by the terminal in any of the above methods, which is not described herein.

Fig. 7B is a schematic structural diagram of a network device according to an embodiment of the present disclosure. As shown in fig. 7B, the network device 7200 may include: at least one of the transceiver module 7201, the processing module 7202, and the like. In some embodiments, the processing module 7202 is configured to determine that the frequency band group meets a first condition, and determine that the switching period is located in a first frequency band or a second frequency band, where the frequency band group includes a plurality of frequency bands, and the switching period is used to instruct the terminal to perform a duration required for switching the frequency bands, where the first frequency band is different from the second frequency band. Optionally, the transceiver module is configured to perform at least one of the communication steps of sending and/or receiving performed by the network device 7200 in any of the above methods, which is not described herein.

Optionally, the processing module 7202 is configured to perform at least one of the communication steps such as the processing performed by the network device in any of the above methods, which is not described herein.

In some embodiments, the transceiver module 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 processing module 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. 8A 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. 8A, 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. The communication device 8100 is configured to perform any of the above methods.

In some embodiments, communication device 8100 also includes one or more memory 8102 for storing instructions. Alternatively, all or part of memory 8102 may be external to communication device 8100.

In some embodiments, communication device 8100 also includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceivers 8103 perform at least one of the communication steps (e.g., but not limited to, step S2101, step S2102, step S2103, step S2104) of transmission and/or reception in the above-described method.

In some 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, etc. may be replaced with each other, terms such as transmitter, 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 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 signals from the memory 8102 or other device, and being operable to transmit signals to the memory 8102 or other device. For example, the interface circuit 8104 may read instructions stored in the memory 8102 and send the instructions 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. 8A. 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. 8B 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. 8B, but is not limited thereto.

The chip 8200 includes one or more processors 8201, the chip 8200 being configured to perform any of the above methods.

In some embodiments, the chip 8200 further comprises one or more interface circuits 8202. Optionally, an interface circuit 8202 is coupled to the memory 8203, the interface circuit 8202 may be configured to receive signals from the memory 8203 or other device, and the interface circuit 8202 may be configured to transmit signals to the memory 8203 or other device. For example, the interface circuit 8202 may read instructions stored in the memory 8203 and send the instructions to the processor 8201.

In some embodiments, the interface circuit 8202 performs at least one of the sending and/or receiving communication steps of the methods described above, and the processor 8201 performs at least one of the other steps.

In some embodiments, the terms interface circuit, interface, transceiver pin, transceiver, etc. may be interchanged.

In some embodiments, chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memory 8203 may be external to the chip 8200.

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 for switching a frequency band, the method being performed by a terminal, the method comprising:

2. The method of claim 1, wherein determining that the switching period is located in the first frequency band, the first condition comprises at least one of:

3. The method of claim 1, wherein determining that the switching period is located in the second frequency band, the first condition comprises at least one of:

4. The method of claim 1, wherein the first condition comprises at least one of:

5. The method of claim 1 or 4, wherein determining that the switching period is located in the first frequency band, the first condition comprises at least one of:

6. The method of claim 1 or 4, wherein determining that the switching period is located in the second frequency band, the first condition comprises at least one of:

7. The method according to any one of claims 1 to 6, further comprising:

8. The method according to any of claims 1 to 6, wherein the first condition and the manner in which the frequency band in which the switching period is determined is agreed upon by a communication protocol.

9. The method according to any one of claims 1 to 8, wherein the first frequency band is Switch-to-band and the second frequency band is Switch-from band; or, the first frequency band is Switch-from band, and the first frequency band is Switch-to band.

10. The method of claim 9, wherein the Switch-to-band is used to indicate a band to which a next transmission is directed, and wherein the Switch-from band is used to indicate a band to which an initial transmission is directed.

11. A method of band switching, the method being performed by a network device, the method comprising:

12. The method of claim 11, wherein determining that the switching period is located in the first frequency band, the first condition comprises at least one of:

13. The method of claim 11, wherein determining that the switching period is located in the second frequency band, the first condition comprises at least one of:

14. The method of claim 11, wherein the first condition comprises at least one of:

15. The method according to claim 11 or 14, wherein determining that the switching period is located in the first frequency band, the first condition comprises at least one of:

16. The method according to claim 11 or 14, wherein determining that the switching period is located in the second frequency band, the first condition comprises at least one of:

17. The method according to any one of claims 11 to 16, further comprising:

18. A method according to any one of claims 11 to 16, wherein the first condition and the manner in which the frequency band in which the switching period is determined is agreed upon by a communication protocol.

19. The method according to any of claims 11 to 18, wherein the first frequency band is Switch-to-band and the second frequency band is Switch-from band; or, the first frequency band is Switch-from band, and the first frequency band is Switch-to band.

20. The method of claim 19, wherein the Switch-to-band is used to indicate a band to which a next transmission is directed, and wherein the Switch-from band is used to indicate a band to which an initial transmission is directed.

21. A method for switching frequency bands, the method comprising:

22. A terminal, the terminal comprising:

23. A network device, the network device comprising:

24. A terminal, the terminal comprising:

one or more processors;

wherein the terminal is configured to perform the frequency band switching method according to any one of claims 1 to 10.

25. A network device, the network device comprising:

One or more processors;

wherein the network device is configured to perform the frequency band switching method of any one of claims 11 to 20.

26. A communication system comprising a terminal configured to implement the band switching method of any one of claims 1 to 10 and a network device configured to implement the band switching method of any one of claims 11 to 20.

27. A storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method of band switching of any one of claims 1 to 10 or to perform the method of band switching of any one of claims 11 to 20.