CN115918171A

CN115918171A - Communication method and device

Info

Publication number: CN115918171A
Application number: CN202080102799.9A
Authority: CN
Inventors: 杨皓睿; 付喆
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2023-04-04
Also published as: WO2022047749A1

Abstract

The embodiment of the application provides a communication method and a device, wherein the method comprises the following steps: the first device obtains a first frequency band corresponding to a first network slice, wherein the first network slice is a network slice allowed to be used by User Equipment (UE). The first device determines that the first frequency band satisfies a first condition, and then the first device determines that the UE is allowed to transmit data according to the first network slice. The UE is allowed to transmit data according to the first network slice when the first frequency band of the first network slice meets the first condition, so that the problem that the UE does not support the frequency band of the first network slice is effectively avoided, the problem that service transmission cannot be performed due to frequency band switching of the UE is effectively avoided, and the stability of communication is effectively guaranteed.

Description

Communication method and device

Technical Field

The present application relates to communications technologies, and in particular, to a communication method and apparatus.

Background

With the continuous emergence of various communication services, the requirements of different communication services on network performance are significantly different, and the fifth generation mobile communication system (5G) introduces the concept of Network Slice (NS) to cope with the difference of the requirements of different communication services on network performance.

At present, when a terminal device needs to use a Network Slice, it is necessary to first request the Network Slice for use, then the Network determines, according to request Information sent by the terminal device, network Slice Selection Assistance Information (NSSAI) that allows the Network Slice to select an individual Network Slice Selection Assistance Information (S-NSSAI) including at least one Network Slice in the NSSAI in a range of User Equipment (UE) subscription and Network Slice deployment, and then the terminal device may perform data transmission in at least one Network Slice.

However, frequency bands used by different network slices may be different, and therefore, a situation may occur in which the terminal device cannot perform communication in a part of the network slices, thereby resulting in poor communication stability.

Disclosure of Invention

The embodiment of the application provides a communication method and device, so as to avoid the problem of poor communication stability.

In a first aspect, an embodiment of the present application provides a communication method, including:

the method comprises the steps that first equipment acquires a first frequency band corresponding to a first network slice, wherein the first network slice is a network slice which is allowed to be used by User Equipment (UE);

and if the first device determines that the first frequency band meets a first condition, the first device determines to allow the UE to transmit data according to the first network slice.

In one possible implementation, the first condition includes:

the first frequency band is a frequency band supported by the UE.

In one possible implementation, the first condition further includes:

the UE supports data transmission in at least two frequency bands.

In one possible implementation, the method further includes:

the first device acquires a second frequency band corresponding to a second network slice, wherein the second network slice is a network slice in which the UE has established a session.

In one possible implementation, the first condition further includes:

the UE supports transmission of data in only one frequency band at one point in time, and the first frequency band and the second frequency band are the same.

In one possible implementation, the method further includes:

and acquiring a first priority of a first service corresponding to the first network slice and a second priority of a second service corresponding to the second network slice, wherein the second service corresponds to the session established by the UE.

In one possible implementation, the first condition further includes:

the UE supports data transmission in only one frequency band at one time point, the first frequency band is different from the second frequency band, and the first priority is higher than the second priority.

In a possible implementation manner, the determining, by the first device, that the first frequency band satisfies a first condition includes:

the first equipment acquires first information of the UE;

and the first equipment determines that the first frequency band meets a first condition according to the first information.

In one possible implementation manner, the first information includes at least one of the following information:

frequency bands supported by the UE;

first indication information, wherein the first indication information is used for indicating whether the UE supports data transmission on a plurality of frequency bands;

and the number of frequency bands for data transmission is supported by the UE.

In one possible implementation manner, the first device is a radio access network RAN device;

the method further comprises the following steps:

the RAN equipment receives single network slice selection auxiliary information S-NSSAI sent by an AMF network element, wherein the first network slice is the network element indicated by the S-NSSAI.

In one possible implementation, the method further includes:

and when it is determined that the first frequency band does not satisfy the first condition, the RAN device sends rejection information to the AMF network element, where the rejection information is used to indicate that the UE is rejected to establish a session according to the first network slice, and the rejection information includes a rejection cause value.

In one possible implementation manner, the first device is a RAN device;

the method further comprises the following steps:

the RAN equipment receives allowed network slice selection auxiliary information NSSAI sent by an AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.

In one possible implementation, the method further includes:

upon determining that the first frequency band does not satisfy a first condition, the RAN device deletes the S-NSSAI of the first network slice from the allowed NSSAI.

In one possible implementation, the method further includes:

when it is determined that the first frequency band does not satisfy the first condition, the RAN device sends the S-NSSAI of the first network slice to the AMF network element, so that the AMF network element deletes the S-NSSAI of the first network slice from the allowed NSSAI.

In one possible implementation, the first device is a UE;

the method further comprises the following steps:

the UE receives an allowed NSSAI sent by an AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.

In one possible implementation, if the first priority is higher than the second priority, the method further includes:

and the UE enters an idle state, selects a cell supporting the first frequency band, and establishes a session through the cell supporting the first frequency band.

In a possible implementation manner, a first frequency band corresponding to the first network slice is sent by the AMF network element; or

And the first frequency band corresponding to the first network slice is preconfigured in the UE.

In a second aspect, an embodiment of the present application provides a communication apparatus, including:

an obtaining module, configured to obtain, by a first device, a first frequency band corresponding to a first network slice, where the first network slice is a network slice that is allowed to be used by a user equipment UE;

a processing module, configured to determine, by the first device, that the first frequency band satisfies a first condition, that the UE is allowed to transmit data according to the first network slice.

The first condition includes:

the first frequency band is a frequency band supported by the UE.

In one possible implementation, the first condition further includes:

the UE supports data transmission in at least two frequency bands.

In a possible implementation manner, the obtaining module is further configured to:

In one possible implementation, the first condition further includes:

and acquiring a first priority of a first service corresponding to the first network slice and a second priority of a second service corresponding to the second network slice, wherein the second service corresponds to a session established by the UE.

In one possible implementation, the first condition further includes:

In a possible implementation manner, the processing module is specifically configured to:

the first equipment acquires first information of the UE;

frequency bands supported by the UE;

and the number of frequency bands for data transmission is supported by the UE.

further comprising: a transceiver module;

the transceiver module is configured to receive, by the RAN device, single network slice selection auxiliary information S-NSSAI sent by an AMF network element, where the first network slice is a network element indicated by the S-NSSAI.

In one possible implementation, the transceiver module is further configured to:

and when it is determined that the first frequency band does not meet a first condition, the RAN device sends rejection information to the AMF network element, where the rejection information is used to indicate that the UE is rejected to establish a session according to the first network slice, and the rejection information includes a rejection cause value.

In one possible implementation manner, the first device is a RAN device;

the transceiver module is further configured to:

In one possible implementation manner, the processing module is further configured to:

In one possible implementation, the first device is a UE;

the transceiver module is further configured to:

and the UE receives an allowed NSSAI sent by the AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.

In a possible implementation manner, if the first priority is higher than the second priority, the processing module is further configured to:

In a possible implementation manner, a first frequency band corresponding to the first network slice is sent by the AMF network element; or alternatively

In a third aspect, an embodiment of the present application provides a communication device, including: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executes the computer-executable instructions stored by the memory, so that the processor performs the communication method as described in the first aspect and any one of the possible implementation manners of the first aspect.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is configured to implement the communication method as described in the first aspect and any one of the possible implementation manners of the first aspect.

The embodiment of the application provides a communication method and a device, wherein the method comprises the following steps: the first device acquires a first frequency band corresponding to a first network slice, wherein the first network slice is a network slice allowed to be used by User Equipment (UE). The first device determines that the first frequency band satisfies a first condition, and then the first device determines to allow the UE to transmit data according to the first network slice. When the first frequency band of the first network slice meets the first condition, the UE is allowed to transmit data according to the first network slice, so that the problem that the UE does not support the frequency band of the first network slice is effectively avoided, the problem that service transmission cannot be performed due to frequency band switching of the UE is effectively avoided, and the stability of communication is effectively guaranteed.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 3 is a signaling interaction diagram of a UE requesting a network slice according to an embodiment of the present application;

fig. 4 is a flowchart of a communication method according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an embodiment of the present disclosure for satisfying a first condition;

FIG. 6 is a schematic diagram of another possible embodiment of the present application for satisfying a first condition;

FIG. 7 is a schematic diagram of another possible embodiment of the present disclosure that satisfies a first condition;

fig. 8 is a flowchart of a communication method according to another embodiment of the present application;

fig. 9 is a signaling interaction diagram of a session establishment procedure according to an embodiment of the present application;

FIG. 10 is a schematic diagram of an embodiment of the present application for providing a possible situation where the first condition is not satisfied;

FIG. 11 is a schematic diagram of another possible embodiment of the present disclosure that does not satisfy the first condition;

fig. 12 is a signaling interaction diagram of a registration process according to an embodiment of the present application;

fig. 13 is a signaling interaction diagram of another registration process provided in an embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

In order to better understand the technical solution of the present application, the following first introduces the related concepts related to the present application:

network slicing: the network slice is a networking mode according to needs, a plurality of virtual end-to-end networks can be separated on a unified infrastructure, and each network slice is logically isolated from a wireless access network bearing network to a core network so as to adapt to various types of applications. In one network slice, at least three parts of a wireless network sub-slice, a bearer network sub-slice and a core network sub-slice can be divided.

S-NSSAI: single Network Slice Selection Assistance Information (S-NSSAI) refers to Information used to identify a Network Slice, wherein S-NSSAI includes two parts, slice/service type (SST) and Slice Difference (SD):

the SST refers to network slicing behavior expected in the aspects of characteristics and services, and the standard value range of the SST is 1, 2 and 3, wherein the value 1 represents the eMBB, 2 represents the URLLC, and 3 represents the MIoT (Massive Internet of Things).

SD is an optional information to supplement SST to distinguish multiple network slices of the same slice/service type. Wherein the SD may be used to identify the specific service that the user is going to perform.

NSSAI: network Slice Selection Assistance Information (NSSAI) is a set of S-NSSNI. NSSAIs used in the 5G network include Requested NSSAI, allowed NSSAI, configured NSSAI, subscribed NSSAI, and targeted NSSAI.

Request NSSAI (Requested NSSAI): is NSSAI that the UE desires to use, which the UE provides to the network side in the registration procedure.

Allowed NSSAI (Allowed NSSAI): the S-NSSAI value is provided to the UE in the registration process of the serving Public Land Mobile Network (PLMN), and indicates that the UE can use the S-NSSAI value in the current registration area of the serving PLMN, and is locally stored in the UE.

Configuration NSSAI (Configured NSSAI): the network configures NSSAI for the UE in the AMF network element, and is used for representing the network slices supported by the AMF network element.

Subscription NSSAI (Subscribed NSSAI): NSSAI in user subscription data for a unified data management function (UDM);

rejection NSSAI (Rejected NSSAI): NSSAI configured by the network and not allowing the user to access;

a communication system to which the embodiments of the present application are applied will be explained below.

The embodiment of the present application is applied to a wireless communication system including a plurality of network slices, and the communication system of the present application is described with reference to fig. 1, where fig. 1 is a schematic diagram of a communication system provided in the embodiment of the present application.

Schematically, reference may be made to a schematic diagram of the communication system 100 shown in fig. 1, as shown in fig. 1, the wireless network communication system 100 is logically abstractly divided into a plurality of network slices, and fig. 1 shows 3 network slices, which are: network slice 1-3. It should be understood that the network slice is a logical partition, and there may be a region overlapping situation between multiple network slices, for example, there is a region overlapping situation between 3 network slices in fig. 1.

For any one network slice in fig. 1, an end-to-end logical network is formed, and logics between different network slices are isolated from each other. Each network slice can provide one or more network services for the terminal device, and the network services provided by different network slices are not interfered and influenced mutually. Typically, the network characteristics and performance requirements of different network slices are not the same.

Currently, there are several types of network slices: eMBBs (Enhanced Mobile Broadband ), URLLC (Ultra-Reliable and Low-Latency Communication with Ultra-Low Latency and Ultra-high reliability), and MIoT (Massive Internet of Things). It should be understood that as technology advances, the present solution may also be applicable to other types of network slices that may occur as technology evolves.

Next, a system of a communication architecture in the present application is described with reference to fig. 2, and fig. 2 is an architecture diagram of a communication system according to an embodiment of the present application. Schematically, fig. 2 shows only one network slice 1.

As shown in fig. 2, the communication system includes: a UE, (Radio) Access Network (R) AN device, AN Access and Mobility Management Function (AMF) Network element, a Session Management Function (SMF) Network element, a User Plane Function (UPF) Network element, AN Authentication Server Function (AUSF) Network element, a Policy Control Function (PCF) Network element, AN Application Function (AF) Network element, a unified data Management Function (UDM) Network element, a Network Slice Selection Function (NSSF) Network element, a Data Network (DN) Network element connecting operator networks, and the like.

Among these network elements, NSSF network elements, DN network elements, UDM network elements, AMF network elements are shared in multiple network slices. SMF network elements and user equipments typically belong to a specific network slice. The PCF network element may be shared among multiple network slices or may belong to a particular network slice. The (R) AN devices are typically shared among multiple network slices.

Referring to fig. 2, the functional units described above may communicate with each other through a next generation Network (NG) interface, such as: the UE can transmit control plane information with the AMF network element through AN NG interface 1 (N1 for short), the RAN equipment can establish a user plane data transmission channel with the UPF through AN NG interface 3 (N3 for short), the AN/RAN equipment can establish control plane signaling connection with the AMF network element through AN NG interface 2 (N2 for short), the UPF can perform information interaction with the SMF network element through AN NG interface 4 (N4 for short), the UPF can interact user plane data with a data network DN through AN NG interface 6 (N6 for short), the AMF network element can perform information interaction with the SMF network element through AN NG interface 11 (N11 for short), the SMF network element can perform information interaction with the PCF network element through AN NG interface 7 (N7 for short), and the AMF network element can perform information interaction with the AUSF through AN NG interface 12 (N12 for short). It should be noted that fig. 2 is only an exemplary architecture diagram, and the network architecture may include other functional units besides the functional units shown in fig. 2.

The network elements in fig. 2 will now be described in detail.

The UE: the terminal device can be deployed on the land, including indoors or outdoors, and is handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). In this embodiment, the terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical treatment (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transport safety (tRAN device transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), and the like, which are not exhaustive. The embodiments of the present application do not limit the specific technologies, device forms, and names used by the terminal device.

(R) AN device: the wireless side access method is used for the wireless side access of the terminal equipment and provides access service for the terminal equipment to access a wireless network. The possible deployment forms of the access network equipment comprise: a split scenario of a Centralized Unit (CU) and a Distributed Unit (DU), and a single site scenario.

In a separation scenario, a CU supports Radio Resource Control (RRC), packet Data Convergence Protocol (PDCP), service Data Adaptation Protocol (SDAP), and other protocols; the DU mainly supports a Radio Link Control (RLC), a Medium Access Control (MAC) and a physical layer protocol.

In a single-site scenario, a single site may include one or more of a radio base station (new radio Node, gNB), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (hnb), and a Base Band Unit (BBU).

In an actual communication scenario, there may be one or more gnbs (typically multiple) within the entire service area of one network slice. Each gNB has a coverage area, and there may be one or more cells (cells) in the coverage area, and each Cell has a unique Global Cell Identifier GCI (Global Cell Identifier).

AMF network element: the method is mainly used for the flows of terminal equipment attachment, mobility management and tracking area update in a mobile network, the access management network element terminates Non Access Stratum (NAS) messages, completes registration management, connection management, reachability management, tracking area list (TA list) allocation, mobility management and the like, and transparently routes Session Management (SM) messages to the session management network element.

SMF network element: the method is mainly used for session management in the mobile network, such as session establishment, modification and release. The specific functions include allocating an Internet Protocol (IP) address to the terminal device, selecting a user plane network element providing a message forwarding function, and the like.

UPF network element: it may also be referred to as Protocol Data Unit (PDU) and session anchor Point (PSA), and is mainly responsible for processing user packets, such as forwarding, charging, and lawful interception.

PCF network element: including a user subscription data management function, a policy control function, a charging policy control function, quality of service (QoS) control, etc.

It is to be noted that in a practical communication network, a PCF may also be divided into several entities, either hierarchically or functionally. For example, in a communication system, may include: a global PCF and a plurality of PCFs in the slice, wherein each PCF in the slice is used for realizing the policy control function in the slice of the network. For another example, according to the functional division, the PCF may also be composed of a Session Management PCF (SM-PCF) and an Access Management PCF (AM-PCF), where the PCF includes 2 entities.

NSSF network element: the method is mainly used for selecting the appropriate network slice for the service of the terminal equipment. In the 5G communication system, the network slice selection network element may be a Network Slice Selection Function (NSSF) network element.

DN network element: the method is used for providing data transmission service for the terminal equipment. Specifically, the DN may be a Network element of a Public Data Network (PDN) Network, such as the internet (internet), or may be a Network element of a Local Access Data Network (LADN), such as a Network of a Mobile Edge Computing (MEC) node.

UDM network element: and the subscription information is used for managing the terminal equipment.

AUSF network element: for taking charge of authentication functions for the terminal device, etc.

It should be noted that each of the functional units described above may work independently, or may be combined together to implement some control functions, such as access control and mobility management functions for terminal equipment, such as access authentication, security encryption, location registration, and session management functions for establishing, releasing, and changing a user plane transmission path.

Based on the network architecture described above, when the UE needs to use a network slice, it needs to request the network to use the slice first, and after the network agrees, a PDU session (session) is established in the requested network slice to transmit data. The following describes an implementation manner of requesting a network slice by a UE in a registration process in the present application, and is described with reference to fig. 3, where fig. 3 is a signaling interaction diagram of requesting a network slice by a UE according to an embodiment of the present application.

As shown in fig. 3:

1. UE sends registration request to AMF network element

The UE may send a Registration request (Registration request) to the AMF network element, where the Registration request may include the S-NSSAI that the UE needs to request.

In the using process, the UE may relate to wireless transmission requirements of multiple types of service data, and the service data have different performance requirements on the wireless network, and generally, different service data need to be transmitted using different network slices.

In particular, 3GPP defines that end devices and network devices use NSSAI to select network slices. Thus, a set of network slices may be identified with NSSAI, in which case the set of network slices may include one or more network slices, and a single network slice may be identified by S-NSSAI, where one S-NSSAI may be used to identify one network slice.

Therefore, the UE in the present application may determine the S-NSSAI that needs to be Requested according to the service that needs to be Requested, and when the UE sends a registration request to the AMF network element, the registration request may include a Requested NSSAI, where the Requested NSSAI includes the S-NSSAI that the UE needs to request.

2. The AMF network element sends NSSAI allowed to use to the UE

The AMF network element may determine, according to the UE subscription and the network slice deployment range, a network slice identifier that the terminal device can access at the current location, that is, a network slice identifier that the network allows to access, where the network slice identifier that the network allows to use may be referred to as: allowed NSSAI. In other words, the Allowed NSSAI is a set of one or more network slice identities that the terminal device can use simultaneously with the AMF network element through one AN currently registered at the current location. The NSSAI (Allowed NSSAI) Allowed to be used is determined.

And the AMF network element sends the determined Allowed NSSAI to the UE in Registration accept (Registration accept).

3. The AMF network element sends the NSSAI allowed to be used to the RAN equipment

And in the application, the AMF network element may further include the Allowed NSSAI in the N2 message and send the N2 message to the RAN device.

The time for the AMF network element to send the allowed NSSAI to the UE and the RAN device may be sent sequentially, or may also be sent simultaneously, which is not limited herein.

After the UE receives the Allowed NSSAI, a PDU session may be established in a network slice in the Allowed NSSAI, and the PDU session is processed to receive and transmit data after the PDU session is established.

Based on the above description, the technical background and the technical idea of the present application are explained as follows:

in the communication system provided in the embodiment of the present application, on one hand, one network slice may cover one or more Tracking Areas (TAs) and provide services; on the other hand, one TA may support one or more network slices. The TA may be identified by a Tracking Area Identifier (TAI) or a Tracking Area Code (TAC).

When a network is deployed, each network slice corresponds to a respective coverage range, and the coverage ranges of each network slice may be different, where when determining an Allowed NSSAI, the AMF network element needs to ensure that all network slices in the Allowed NSSAI can cover a Registration area (Registration area) allocated to the UE by the AMF network element, where the Registration area may also be understood as a TA list (list).

In a possible implementation manner, the AMF network element may obtain, from the base station, the S-NSSAI and the corresponding TA supported by the base station through an NG setup request (NG setup request) or RAN device configuration update (configuration update) signaling.

In a wireless network, the characteristic difference of each Frequency band is large, and the performance requirements of each network slice are different, so different types of network slices are often deployed on different Frequency points, for example, there are two network slices currently, which respectively correspond to S-NSSAI 1 and S-NSSAI 2, where S-NSSAI 1 uses a Frequency range (Frequency RAN equipment ge, FR) 1 and S-NSSAI 2 uses FR 2.

Meanwhile, different UEs may have different radio capabilities (radio capabilities), so that the case that the current Allowed NSSAI determined by the AMF network element and sent to the UE may occur as follows:

1. the UE does not support bands for certain network slices in the Allowed NSSAI,

if the Allowed NSSAI includes a network slice whose frequency band is not supported by the UE, the PDU session establishment of the UE in this part of the network slice may be successful, so the UE may consider that data transmission may be performed, but the UE may not perform data transmission because the frequency band of the network slice is not supported by the UE.

Or,

2. the UE supports the frequency band of the network slice in the Allowed NSSAI, but the UE cannot transmit data on the frequency band of multiple network slices at the same time.

The Allowed NSSAI includes network slices of multiple frequency bands, and the UE also supports the frequency bands of the network slices, but the UE cannot use multiple frequency bands at the same time, and in the PDU session establishment process, the base station requires the UE to use a new frequency band, and when the UE switches to another frequency band to transmit data, the previous service cannot be transmitted.

Therefore, based on the current configuration manner of the network slice, a situation may occur in which the terminal device cannot perform communication in a part of the network slices in the NSSAI, thereby resulting in poor stability of communication.

Based on the problem that the stability of the current communication is poor, the following technical concept is provided: when the network slice is determined to meet certain conditions, data transmission is carried out according to the network slice, so that the stability of communication carried out according to the network slice is ensured.

The communication method provided by the present application is described below with reference to specific embodiments, fig. 4 is a flowchart of the communication method provided by the embodiment of the present application, fig. 5 is a possible schematic diagram of the communication method provided by the embodiment of the present application, where the first condition is satisfied, fig. 6 is another possible schematic diagram of the communication method provided by the embodiment of the present application, and fig. 7 is another possible schematic diagram of the communication method provided by the embodiment of the present application, where the first condition is satisfied.

As shown in fig. 4, the method includes:

s401, a first device acquires a first frequency band corresponding to a first network slice, wherein the first network slice is a network slice allowed to be used by User Equipment (UE).

In this embodiment, the first device is a device that processes the first network slice, and in a possible implementation manner, the first device may be, for example, the RAN device described above, or the first device may be the user equipment described above.

The first network slice in this embodiment is a network slice Allowed to be used by the UE, and may be, for example, a network slice corresponding to the above-described Allowed NSSAI, and in a possible implementation, the Allowed NSSAI may be determined by an AMF network element; or, if the AMF network element requests a network slice from the NSSF network element, the Allowed NSSAI may also be determined for the NSSF network element, where the first network slice may be any one of the Allowed NSSAIs.

Each network slice corresponds to a respective frequency band, and a first network slice corresponds to a first frequency band in the application.

In a possible implementation manner, for example, the first device may be a RAN device, and the RAN device may determine the frequency of each network slice, so that the RAN device may directly acquire the first frequency band corresponding to the first network slice.

In another possible implementation manner, for example, the first device may be a UE, where the UE may receive information sent by an AMF network element, for example, so as to obtain a first frequency band corresponding to a first network slice; or, the UE may also be configured with frequency bands corresponding to the network slices in advance, so that the UE may also locally acquire the first frequency band corresponding to the first network slice.

In this embodiment, an implementation manner of obtaining the first frequency band corresponding to the first network slice is not particularly limited, and may be selected according to actual requirements.

S402, the first device determines that the first frequency band meets a first condition, and then the first device determines that the UE is allowed to transmit data according to the first network slice.

In this embodiment, to avoid a problem that the UE cannot perform data transmission according to a part of network slices, which results in poor communication stability, the first device in this embodiment may determine in advance whether the UE can perform data transmission according to the first network slice, and when the determination result is ok, perform data transmission according to the first network slice, thereby effectively ensuring communication stability.

In a possible implementation manner, the first device may determine whether the first frequency band satisfies a first condition, so as to determine whether data transmission may be performed according to the first network slice, where the first condition is a condition indicating whether the UE may perform data transmission according to the first network slice, and possible implementation manners of the first condition are described below:

it can be understood that, when a frequency band of a certain network slice is a frequency band that is not supported by the UE, the UE cannot perform data transmission according to the network slice, and therefore in a possible implementation manner, the first condition may include: the first frequency band is a frequency band supported by the UE.

Meanwhile, if the frequency band of a certain network slice is a frequency band supported by the UE, but the frequency band of the network slice is different from the frequency band of the network slice in which the UE currently establishes a session, and the UE does not support data transmission in multiple frequency bands, in this case, in order to avoid a problem that the previous service cannot be transmitted when the UE switches to another frequency band to transmit data, the UE still cannot perform data transmission according to the network slice, so that the first frequency band may be the same as the frequency band of the network slice in which the session is currently established, or the UE supports data transmission in multiple frequency bands.

In a possible implementation manner of this embodiment, in order to determine whether the first frequency band is the same as the frequency band for which the session network slice has been established, the first device may further obtain a second frequency band corresponding to a second network slice, where the second network slice is the network slice for which the session has been established by the UE.

The second network slice is a network slice in which the UE has currently established a session, and the second network slice corresponds to a second frequency band, where an implementation manner for the first device to acquire the second frequency band is similar to the above-described implementation manner for the first device to acquire the first frequency band, and is not described here again.

Based on the above description, the first condition in the present embodiment may include, for example:

the first frequency band is a frequency band supported by the UE.

In the following, an implementation manner that the first frequency band satisfies the current first condition is understood with reference to fig. 5, referring to fig. 5, when the first frequency band satisfies the first condition, it indicates that the first frequency band of the first network slice is a frequency band supported by the UE, in this case, referring to fig. 5, it may be determined that the first frequency band satisfies the first condition, and therefore the first device may determine to allow the UE to transmit data according to the first network slice.

In a possible implementation manner of the scenario shown in fig. 5, the first condition further includes: the UE can support data transmission in multiple frequency bands, and no matter whether the first frequency band is the same as the second frequency band, when the UE performs data transmission in the first frequency band according to the first network slice, the UE does not cause that a service corresponding to the second network slice cannot be transmitted.

In another possible implementation manner, the first condition in this embodiment may further include:

Referring to fig. 6, when the first frequency band satisfies the first condition, it indicates that the first frequency band of the first network slice is a frequency band supported by the UE, and the UE does not support data transmission in multiple frequency bands, but the first frequency band and the second frequency band are the same, as shown in fig. 6. In this case, because the frequency bands of the first network slice and the second network slice are the same, when the UE performs data transmission according to the first network slice, the UE also performs data transmission on the same frequency band, so that the service corresponding to the second network slice cannot be transmitted without any chance, and therefore, when the first device determines that the current first condition is satisfied, the first device may determine to allow the UE to transmit data according to the first network slice.

In this embodiment, a first priority of a first service corresponding to a first network slice may also be obtained, and a second priority of a second service corresponding to a second network slice may also be obtained, where the second service corresponds to a session that has been established by the UE.

In yet another possible implementation manner, the first condition in this embodiment may further include:

the UE only supports data transmission in one frequency band at one time point, the first frequency band is different from the second frequency band, and the first priority is higher than the second priority.

Referring to fig. 7, when the first frequency band satisfies the first condition, it indicates that the first frequency band of the first network slice is a frequency band supported by the UE, and the UE does not support data transmission in multiple frequency bands, and the first frequency band and the second frequency band are different, but a first priority of a first service corresponding to the first frequency band is higher than a second priority of a second service corresponding to the second frequency band. In this case, since the priority of the first service is higher than that of the second service, the second service is to be processed preferentially, and thus the first device may determine to allow the UE to transmit data according to the first network slice when the first device determines that the current first condition is satisfied.

In the above description, several possible implementation manners of the first condition are introduced, and in the actual implementation process, the implementation of the first condition may also be expanded and adjusted according to actual requirements.

Based on the first condition introduced in this embodiment, when it is determined that the first frequency band satisfies the first condition, the first device determines to allow the UE to transmit data according to the first network slice, so that it can be effectively ensured that when the current UE performs data transmission according to the first network slice, a situation that the UE does not support the frequency band of the first network slice does not occur, and a situation that a previous service cannot be transmitted when the UE is switched to the frequency band of the first network slice to perform data transmission does not occur, thereby effectively ensuring stability of communication.

The communication method provided by the embodiment of the application comprises the following steps: the first device obtains a first frequency band corresponding to a first network slice, wherein the first network slice is a network slice allowed to be used by User Equipment (UE). The first device determines that the first frequency band satisfies a first condition, and then the first device determines that the UE is allowed to transmit data according to the first network slice. The UE is allowed to transmit data according to the first network slice when the first frequency band of the first network slice meets the first condition, so that the problem that the UE does not support the frequency band of the first network slice is effectively avoided, the problem that service transmission cannot be performed due to frequency band switching of the UE is effectively avoided, and the stability of communication is effectively guaranteed.

Based on the foregoing embodiment, an implementation manner for determining whether the first frequency band and the second frequency band satisfy the first condition in the present application is described below with reference to a specific embodiment, and fig. 8 is a flowchart of a communication method provided in another embodiment of the present application.

As shown in fig. 8, the method includes:

s801, the first equipment acquires first information of the UE.

In a possible implementation manner, the first information of the UE may include, for example, understandable capability information of the UE, and the first information of the UE may include, for example, at least one of the following information:

frequency bands supported by the UE;

the first indication information is used for indicating whether the UE supports data transmission on a plurality of frequency bands;

and the number of the frequency bands for supporting data transmission by the UE.

And determining whether the UE supports simultaneous data transmission on a plurality of frequency bands according to the first indication information and/or the number of the frequency bands which are supported by the UE for data transmission.

In this embodiment, the UE transmits data in multiple frequency bands, which may be that the UE transmits data in multiple frequency bands at the same time, or that the UE does not transmit data in multiple frequency bands at the same time; the frequency band format supported by the UE for data transmission may be the number supported by the UE at the same time, or may also be the number supported by the UE at different times.

S802, the first device determines that the first frequency band meets a first condition according to the first information.

In this embodiment, the first information may indicate a frequency band supported by the UE and whether the UE supports data transmission on multiple frequency bands, so that the first device may determine whether the first frequency band satisfies the first condition according to the first information, where an implementation manner of the determination is similar to that described in the foregoing embodiment, and is not described here again.

In the embodiment of the application, by acquiring the first information of the UE, it can be quickly determined whether the frequency bands supported by the UE and the UE support data transmission on multiple frequency bands, so as to determine whether the first condition is met according to the first information in the following, thereby effectively improving the accuracy of determining the first condition.

Based on the foregoing embodiments, the first device in this application may be, for example, a RAN device, or the first device may also be, for example, a UE, and the following separately describes implementation manners of processing the first network slice by each device in combination with three specific embodiments.

First, a possible implementation manner that a first device is a RAN device is described with reference to fig. 9 to fig. 11, where fig. 9 is a signaling interaction diagram of a session establishment procedure provided in an embodiment of the present application, fig. 10 is a possible schematic diagram that does not satisfy a first condition and is provided in the embodiment of the present application, and fig. 11 is another possible schematic diagram that does not satisfy the first condition and is provided in the embodiment of the present application.

As shown in fig. 9, the method includes:

0. the UE performs a Registration (Registration) procedure to obtain an Allowed NSSAI.

The implementation manner of the UE performing the registration procedure is similar to that described above, and after performing the registration procedure, the UE receives an Allowed NSSAI sent by the AMF network element, where the Allowed NSSAI includes at least one S-NSSAI.

1. And the UE sends the uplink NAS transmission to the AMF network element.

In this embodiment, the UE may establish a PDU session according to an S-NSSAI request corresponding to a service, and in a possible implementation manner, the UE may send an upLink non-access stratum transport (UL NAS tRAN device port) to an AMF network element through RAN equipment, where the upLink NAS transport may include an S-NSSAI and a PDU session establishment request (PDU session establishment request) corresponding to the service of the UE.

2. And the AMF network element forwards the S-NSSAI and PDU session establishment request to the SMF.

The AMF network element may send session establishment to the SMF, where the session establishment includes a session establishment request of S-NSSAI and PDU sent by the UE.

3. SMF agrees to establish PDU conversation and sends conversation establishing response to AMF network element.

The session establishment response sent by the SMF may include S-NSSAI, N2 Session Management (SM) message, and PDU session establishment accept (PDU session authorization accept).

Wherein, the S-NSSAI in the session establishment response is the S-NSSAI corresponding to the UE request service.

4. The AMF network element sends an N2 Mobility Management (MM) message to the RAN device.

The N2 MM message may include S-NSSAI, N2 SM message, and PDU session establishment acceptance, so as to forward the received session establishment response to the RAN device.

5. And when determining that the first frequency band corresponding to the S-NSSAI does not meet the first condition, the RAN equipment rejects the establishment of the session.

In this embodiment, the RAN device may receive S-NSSAI sent by the AMF network element, where S-NSSAI may indicate the first network slice described in the foregoing embodiment.

The RAN equipment determines whether a first frequency band meets a first condition or not according to the first frequency band corresponding to the first network slice indicated by the S-NSSAI, and in a possible implementation manner, if the first frequency band meets the first condition, the RAN equipment determines that the UE can perform data transmission according to the first network slice; in another possible implementation, if the first frequency band does not satisfy the first condition, the RAN device rejects the session establishment, thereby indicating that the UE is not allowed to perform data transmission according to the first network slice indicated by the S-NSSAI.

The implementation manner of determining that the first frequency band satisfies the first condition is similar to that described above, and the following describes a case where the first frequency band does not satisfy the first condition:

in a possible implementation manner, the RAN device may determine, according to the first information of the UE and the first frequency band corresponding to the S-NSSAI, whether the UE supports the first frequency band corresponding to the S-NSSAI, referring to fig. 10, if the UE does not support the first frequency band corresponding to the S-NSSAI, whether the current UE supports data transmission in multiple frequency bands or not, it may be determined that the current first frequency band does not satisfy the first condition, so as to reject session establishment.

In another possible implementation manner, referring to fig. 11, if the UE supports the first frequency band corresponding to S-NSSAI, but the UE does not support data transmission in multiple frequency bands, and the first frequency band is different from the second frequency band of the network slice in which the UE has already established the session, it is determined that the current first frequency band does not satisfy the first condition, so as to reject establishment of the session.

Optionally, in the above-described implementation manner in which the first frequency band and the second frequency band are different, for example, a service priority corresponding to the first frequency band may be lower than a service priority corresponding to the second frequency band.

In a possible implementation manner under the present situation, the RAN device may obtain, from the UE, the first information of the UE and the priority of the UE on different frequency bands in the RRC connection establishment process, so as to determine whether the first frequency band satisfies the first condition according to the first information of the UE and the priority of the UE on different frequency bands.

In this embodiment, when the RAN device determines that the first frequency band does not satisfy the first condition, the UE is rejected to establish the PDU session according to the first network slice corresponding to the S-NSSAI, so that the stability of communication can be effectively ensured.

6. The RAN equipment sends an N2 MM message to the AMF network element.

And when determining to reject the session establishment, the RAN device may send rejection information to the AMF network element, where the rejection information is used to indicate that the UE is rejected to establish the session according to the first network slice.

For example, the RAN device may send an N2 MM message to the AMF network element, where the N2 MM message may set a rejection (PDU session setup request) for the PDU session, which includes: S-NSSAI, N2 SM message, PDU session establishment accept, where the N2 SM message may include, for example, a reject cause value, where the reject cause value is used to indicate a reason for rejecting the UE to establish the session according to the first network slice, and the reject cause value may be, for example, UE radio incompatible.

7. The AMF network element sends a session update to the SMF.

The AMF network element may forward information related to rejection sent by the RAN device to the SMF, for example, the AMF network element may send a session update to the SMF, where the session update may include an S-NSSAI, an N2 SM message, and a PDU session establishment request, and the N2 SM message may include a rejection cause value, for example.

8. The SMF sends a PDU session setup reject to the UE.

After receiving the session update forwarded by the AMF network element, the SMF may determine that the current RAN device rejects the UE to establish the session according to the first network slice, so the SMF may send a PDU session establishment reject (PDU session establishment reject request) to the UE, where the PDU session establishment reject may include, for example, a reject cause value UE radio compatible.

Therefore, when the first frequency band does not meet the first condition, the UE cannot transmit data according to the first network slice.

In the communication method provided by the embodiment of the application, in the process that the UE establishes the PDU session according to the S-NSSAI request corresponding to the service, the RAN device determines whether the first frequency band corresponding to the first network slice indicated by the S-NSSAI requested by the UE satisfies the first condition, and when the first frequency band does not satisfy the first condition, the RAN device rejects the UE to establish the session, so that the problem that the UE performs data transmission according to the network slice which does not satisfy the first condition and the communication stability is poor can be effectively avoided.

Based on the foregoing embodiment, with reference to fig. 12, another possible implementation manner in which the first device is a RAN device in the present application is described below, and fig. 12 is a signaling interaction diagram of a registration process provided in this embodiment of the present application.

As shown in fig. 12, the method includes:

1. the UE sends a Registration request (Registration request) to the AMF network element.

The registration request includes a requested NSSAI (requested NSSAI) required by the UE.

2. The AMF network element sends an N2 MM message to the RAN device.

The AMF network element may determine the Allowed NSSAI according to the UE subscription and the network slice deployment range, and send the Allowed NSSAI to the RAN device through the N2 MM message.

In one possible implementation, the AMF network element may send the Allowed NSSAI to the RAN device in a Registration accept (Registration accept), where if the AMF network element does not send the Registration accept, it means that the AMF network element first queries the RAN device, and then determines the final Allowed NSSAI.

3. And the RAN equipment determines that the allowed NSSAI comprises S-NSSAIs with the frequency bands not meeting the first condition, and deletes the S-NSSAIs from the allowed NSSAIs.

In this embodiment, the RAN device may receive an allowed NSSAI sent by the AMF network element, where the allowed NSSAI includes at least one network slice, and each network slice may be used as a first network slice in this application, and the RAN device determines whether a frequency band of each network slice in the allowed NSSAI satisfies a first condition.

In one possible implementation, the RAN device deletes the S-NSSAI that does not satisfy the first condition from the allowed NSSAI, and the updated allowed NSSAI may be obtained after the deletion.

The implementation manner of determining whether the first frequency band satisfies the first condition is similar to that described above, and is not described herein again.

Optionally, if in step 2, the RAN device receives the Registration accept sent by the AMF network element, the current RAN device may also send the Registration accept back to the AMF network element.

4. And the AMF network element receives the N2 MM message sent by the RAN equipment.

In this embodiment, the N2 MM message may include the updated allowed NSSAI, and may further include an indication cause value, where frequency bands corresponding to S-NSSAIs included in the updated allowed NSSAI all satisfy the first condition, the indication cause value may be used to indicate a cause for deleting part of S-NSSAIs, and the indication cause value may be, for example, UE radio compatible.

In the above description, the RAN device deletes the S-NSSAI that does not satisfy the first condition, and in another possible implementation manner, the RAN device may further send the S-NSSAI that does not satisfy the first condition to the AMF network element, and delete the S-NSSAI by the AMF network element, thereby obtaining the updated allowed NSSAI.

Therefore, the AMF network element may determine the allowed NSSAI that ultimately conforms to the radio capability of the UE, according to the message sent by the RAN device.

5. The AMF network element sends an N2 MM message to the RAN device.

The N2 MM message may include the allowed NSSAI finally determined by the AMF network element, and the AMF network element may put the finally determined allowed NSSAI in a Registration accept, for example, and send the resulting NSSAI to the RAN device together.

6. The RAN device sends an RRC MM message to the UE.

The RAN device forwards the registration acceptance message to the UE through the RRC MM message, where the registration message includes an allowed NSSAI finally determined by the AMF network element, and in this embodiment, the first frequency bands of each S-NSSAI included in the allowed NSSAI finally determined by the AMF network element all satisfy preset conditions, so that the UE can perform data transmission according to the S-NSSAI in the allowed NSSAI finally determined, and the stability of communication is effectively guaranteed.

In the communication method provided in the embodiment of the present application, in a process of requesting registration by a UE, it is determined whether a frequency band corresponding to each S-NSSAI in allowed NSSAIs determined by an AMF network element satisfies a first condition, and for S-NSSAIs that do not satisfy the first condition, the frequency band corresponding to each S-NSSAI in allowed NSSAIs that are finally sent to the UE is deleted from the allowed NSSAIs, and the updated allowed NSSAIs are sent to the UE in registration reception, so that the frequency band corresponding to each S-NSSAI in allowed NSSAIs that are finally sent to the UE satisfies the first condition, and thus a problem of poor communication stability caused by data transmission performed by the UE according to a network slice that does not satisfy the first condition can be effectively avoided.

Based on the foregoing embodiment, an implementation manner of the first device being a UE is described below with reference to fig. 13, where fig. 13 is a signaling interaction diagram of another registration process provided in this embodiment of the present application.

As shown in fig. 13, the method includes:

1. the RAN device sends the frequency bands corresponding to the S-NSSAI and the S-NSSAI supported by the RAN device to the AMF network element, and the AMF network element replies an acknowledgement character (ack), or,

and the RAN equipment pre-configures the frequency bands corresponding to the S-NSSAI and the S-NSSAI supported by the RAN equipment on the AMF network element in a non-signaling mode.

In a possible implementation manner, the AMF network element may obtain, from the RAN device, the S-NSSAI supported by the RAN device and a frequency band corresponding to the S-NSSAI through an NG setup request (NG setup request) or RAN device configuration update (configuration update) signaling.

2. And the UE sends a registration request to the AMF network element.

Wherein, the registration request includes a requested NSSAI required by the UE.

3. And the AMF network element sends registration acceptance to the UE.

The registration acceptance comprises allowed NSSAI, and the frequency band corresponding to each S-NSSAI in the allowed NSSAI is sent to the UE.

Therefore, in this embodiment, an implementation manner of the first device obtaining the first frequency band corresponding to the first network slice may be that the first frequency band corresponding to the first network slice is sent by the AMF network element.

4. When the UE needs to use a first network slice corresponding to a certain S-NSSAI, the UE determines whether the first network slice meets a first requirement, so as to determine whether to use the current first network slice for data transmission.

The implementation manner of determining whether the frequency band of the first network slice satisfies the first condition by the UE is similar to that described in the foregoing embodiment, and is not described herein again.

In a possible implementation manner of this embodiment, if the UE determines that the current first frequency band is different from the current second frequency band, and the UE supports data transmission only in one frequency band at a time point, the UE may further obtain a first priority of a first service corresponding to the first network slice, and obtain a second priority of a second service corresponding to the second network slice.

It can be understood that the first service is a new service, the second service is an existing service, if the first priority is higher than the second priority, it indicates that the priority of the new service is higher than the priority of the existing service, at this time, the UE enters an idle (idle) state, selects a cell supporting the first frequency band, and establishes a session through the cell supporting the first frequency band.

On the basis of the content described in this embodiment, the foregoing steps 1 to 3 may not be performed, and in another possible implementation manner, frequency bands corresponding to S-NSSAI and S-NSSAI supported by the RAN device may also be preconfigured in the UE, for example, may be configured in a SIM card, or may also be stored in a UE memory, and in the current implementation manner, the UE may directly obtain the first frequency band of the first network slice from local, so as to determine whether the first frequency band of the first network slice meets the first condition.

According to the communication method provided by the embodiment of the application, the frequency bands corresponding to the S-NSSAI and the S-NSSAI supported by the RAN equipment are sent to the UE, or the frequency bands corresponding to the S-NSSAI and the S-NSSAI supported by the RAN equipment are preconfigured in the UE, so that before the UE uses the first network slice, whether the first frequency band of the first network slice meets the first condition or not is judged at first, and the problem that the UE performs data transmission according to the network slice which does not meet the first condition, so that the communication stability is poor can be effectively avoided.

Fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application. Referring to fig. 14, the synchronization apparatus 140 may include an obtaining module 1401, a processing module 1402 and a transceiver module 1403, wherein,

an obtaining module 1401, configured to obtain, by a first device, a first frequency band corresponding to a first network slice, where the first network slice is a network slice that is allowed to be used by a user equipment UE;

a processing module 1402, configured to determine, by the first device, that the first frequency band satisfies a first condition, that the first device allows the UE to transmit data according to the first network slice.

The first condition includes:

the first frequency band is a frequency band supported by the UE.

In one possible implementation, the first condition further includes:

the UE supports data transmission in at least two frequency bands.

In one possible implementation manner, the obtaining module 1401 is further configured to:

In one possible implementation, the first condition further includes:

In a possible implementation manner, the processing module 1402 is specifically configured to:

the first equipment acquires first information of the UE;

frequency bands supported by the UE;

and the number of frequency bands for data transmission is supported by the UE.

In one possible implementation, the first device is a radio access network RAN device;

further comprising: a transceiving module 1403;

the transceiver module 1403 is configured to receive a single network slice selection assistance information S-NSSAI sent by an AMF network element, where the first network slice is a network element indicated by the S-NSSAI.

In a possible implementation manner, the transceiver module 1403 is further configured to:

In one possible implementation manner, the first device is a RAN device;

the transceiving module 1403 is further configured to:

In one possible implementation manner, the processing module 1402 is further configured to:

In one possible implementation, the first device is a UE;

the transceiving module 1403 is further configured to:

In a possible implementation manner, if the first priority is higher than the second priority, the processing module 1402 is further configured to:

The communication device provided in the embodiment of the present application may implement the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects thereof are similar, and are not described herein again.

Fig. 15 is a schematic structural diagram of a terminal device according to an embodiment of the present application. Referring to fig. 15, the terminal device 20 may include: a transceiver 21, a memory 22, a processor 23. The transceiver 21 may include: a transmitter and/or a receiver. The transmitter may also be referred to as a sender, a transmitter, a sending port, a sending interface, and the like, and the receiver may also be referred to as a receiver, a receiving port, a receiving interface, and the like. Illustratively, the transceiver 21, the memory 22, and the processor 23 are connected to each other by a bus 24.

The memory 22 is used for storing program instructions;

processor 23 is operative to execute program instructions stored by the memory to cause terminal device 20 to perform any of the illustrated communication methods described above.

Wherein, the receiver of the transceiver 21 can be used to execute the receiving function of the terminal device in the above communication method.

The embodiment of the application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is used for implementing the communication method.

Embodiments of the present application may also provide a computer program product, which can be executed by a processor, and when the computer program product is executed, the communication method executed by any of the above-mentioned terminal devices can be implemented.

The communication device, the computer-readable storage medium, and the computer program product of the embodiments of the present application may execute the communication method executed by the terminal device, and for specific implementation processes and beneficial effects, reference is made to the above, which is not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The computer program may be stored in a computer readable storage medium. The computer program, when executed by a processor, implements steps comprising the above-described method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

A method of communication, comprising:

the method comprises the steps that first equipment acquires a first frequency band corresponding to a first network slice, wherein the first network slice is a network slice which is allowed to be used by User Equipment (UE);

and if the first device determines that the first frequency band meets a first condition, the first device determines to allow the UE to transmit data according to the first network slice.
The method of claim 1, wherein the first condition comprises:

the first frequency band is a frequency band supported by the UE.
The method of claim 2, wherein the first condition further comprises:

the UE supports transmission of data in at least two frequency bands.
The method according to any one of claims 1-3, further comprising:

the first device acquires a second frequency band corresponding to a second network slice, wherein the second network slice is a network slice in which the UE has established a session.
The method of claim 4, wherein the first condition further comprises:

the UE supports transmission of data in only one frequency band at one point in time, and the first frequency band and the second frequency band are the same.
The method according to any one of claims 1-5, further comprising:

and acquiring a first priority of a first service corresponding to the first network slice and a second priority of a second service corresponding to the second network slice, wherein the second service corresponds to a session established by the UE.
The method of claim 6, wherein the first condition further comprises:

the UE supports data transmission in only one frequency band at one time point, the first frequency band and the second frequency band are different, and the first priority is higher than the second priority.
The method of any of claims 1-7, wherein the first device determining that the first frequency band satisfies a first condition comprises:

the first equipment acquires first information of the UE;

and the first equipment determines that the first frequency band meets a first condition according to the first information.
The method of claim 8, wherein the first information comprises at least one of the following information:

frequency bands supported by the UE;

first indication information, wherein the first indication information is used for indicating whether the UE supports data transmission on multiple frequency bands;

and the number of frequency bands for supporting data transmission by the UE.
The method of any of claims 1-9, wherein the first device is a radio access network, RAN, device;

the method further comprises the following steps:

the RAN equipment receives single network slice selection auxiliary information S-NSSAI sent by an AMF network element, wherein the first network slice is the network element indicated by the S-NSSAI.
The method of claim 10, further comprising:

and when it is determined that the first frequency band does not satisfy the first condition, the RAN device sends rejection information to the AMF network element, where the rejection information is used to indicate that the UE is rejected to establish a session according to the first network slice, and the rejection information includes a rejection cause value.
The method of any one of claims 1-9, wherein the first device is a RAN device;

the method further comprises the following steps:

the RAN equipment receives allowed network slice selection auxiliary information NSSAI sent by an AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.
The method of claim 12, further comprising:

upon determining that the first frequency band does not satisfy a first condition, the RAN device deletes the S-NSSAI of the first network slice from the allowed NSSAI.
The method of claim 12, further comprising:

when it is determined that the first frequency band does not satisfy the first condition, the RAN device sends the S-NSSAI of the first network slice to the AMF network element, so that the AMF network element deletes the S-NSSAI of the first network slice from the allowed NSSAI.
The method of any one of claims 1-9, wherein the first device is a UE;

the method further comprises the following steps:

the UE receives an allowed NSSAI sent by an AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.
The method of claim 15, wherein if the first priority is higher than the second priority, the method further comprises:

and the UE enters an idle state, selects a cell supporting the first frequency band, and establishes a session through the cell supporting the first frequency band.
The method of claim 15, wherein a first frequency band corresponding to the first network slice is sent by the AMF network element; or

And the first frequency band corresponding to the first network slice is preconfigured in the UE.
A communications apparatus, comprising:

an obtaining module, configured to obtain, by a first device, a first frequency band corresponding to a first network slice, where the first network slice is a network slice that is allowed to be used by a user equipment UE;

a processing module, configured to determine, by the first device, that the first frequency band satisfies a first condition, that the UE is allowed to transmit data according to the first network slice.
The apparatus of claim 18, wherein the first condition comprises:

the first frequency band is a frequency band supported by the UE.
The apparatus of claim 19, wherein the first condition further comprises:

the UE supports transmission of data in at least two frequency bands.
The apparatus according to any one of claims 18-20, wherein the obtaining module is further configured to:

the first device acquires a second frequency band corresponding to a second network slice, wherein the second network slice is a network slice in which the UE has established a session.
The apparatus of claim 21, wherein the first condition further comprises:

the UE supports transmission of data in only one frequency band at one point in time, and the first frequency band is the same as the second frequency band.
The apparatus of any one of claims 18-22, wherein the obtaining module is further configured to:

and acquiring a first priority of a first service corresponding to the first network slice and a second priority of a second service corresponding to the second network slice, wherein the second service corresponds to the session established by the UE.
The apparatus of claim 23, wherein the first condition further comprises:

the UE supports data transmission in only one frequency band at one time point, the first frequency band and the second frequency band are different, and the first priority is higher than the second priority.
The apparatus according to any one of claims 18 to 24, wherein the processing module is specifically configured to:

the first equipment acquires first information of the UE;

and the first equipment determines that the first frequency band meets a first condition according to the first information.
The apparatus of claim 25, wherein the first information comprises at least one of:

frequency bands supported by the UE;

first indication information, wherein the first indication information is used for indicating whether the UE supports data transmission on a plurality of frequency bands;

and the number of frequency bands for data transmission is supported by the UE.
The apparatus of any of claims 18-26, wherein the first device is a radio access network, RAN, device;

further comprising: a transceiver module;

the transceiver module is configured to receive, by the RAN device, single network slice selection auxiliary information S-NSSAI sent by an AMF network element, where the first network slice is a network element indicated by the S-NSSAI.
The apparatus of claim 27, wherein the transceiver module is further configured to:

and when it is determined that the first frequency band does not satisfy the first condition, the RAN device sends rejection information to the AMF network element, where the rejection information is used to indicate that the UE is rejected to establish a session according to the first network slice, and the rejection information includes a rejection cause value.
The apparatus of any one of claims 18-26, wherein the first device is a RAN device;

the transceiver module is further configured to:

the RAN equipment receives allowed network slice selection auxiliary information NSSAI sent by an AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.
The apparatus of claim 29, wherein the processing module is further configured to:

upon determining that the first frequency band does not satisfy a first condition, the RAN device deletes the S-NSSAI of the first network slice from the allowed NSSAI.
The apparatus of claim 29, wherein the transceiver module is further configured to:

when it is determined that the first frequency band does not satisfy the first condition, the RAN device sends the S-NSSAI of the first network slice to the AMF network element, so that the AMF network element deletes the S-NSSAI of the first network slice from the allowed NSSAI.
The apparatus of any one of claims 18-26, wherein the first device is a UE;

the transceiver module is further configured to:

the UE receives an allowed NSSAI sent by an AMF network element, wherein the allowed NSSAI comprises S-NSSAI of at least one network slice.
The apparatus of claim 32, wherein if the first priority is higher than the second priority, the processing module is further configured to:

and the UE enters an idle state, selects a cell supporting the first frequency band, and establishes a session through the cell supporting the first frequency band.
The apparatus of claim 32, wherein a first frequency band corresponding to the first network slice is sent by the AMF network element; or

And the first frequency band corresponding to the first network slice is preconfigured in the UE.
A communication device, comprising: a transceiver, a processor, a memory;

the memory stores computer-executable instructions;

the processor executing the computer-executable instructions stored by the memory causes the processor to perform the communication method of any of claims 1 to 17.
A computer-readable storage medium having stored thereon computer-executable instructions for implementing the communication method of any one of claims 1 to 17 when executed by a processor.