CN111182593A - Method for supporting roaming and communication equipment - Google Patents
Method for supporting roaming and communication equipment Download PDFInfo
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- CN111182593A CN111182593A CN201910272914.6A CN201910272914A CN111182593A CN 111182593 A CN111182593 A CN 111182593A CN 201910272914 A CN201910272914 A CN 201910272914A CN 111182593 A CN111182593 A CN 111182593A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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Abstract
The embodiment of the invention provides a method for supporting roaming and communication equipment, wherein the method for supporting roaming applied to first communication equipment comprises the following steps: when a first condition is met, executing a first operation; the first operation is a first related operation of transferring the terminal from the first type network to the second type network; the performing a first operation comprising at least one of: sending first indication information; the first indication information is used for indicating the terminal to be transferred to a second type network; rejecting an access request of a terminal; the connection of the terminal is released. By using the method of the embodiment of the invention, when the terminal roams to the visiting network with the first type network and the second type network simultaneously, and the terminal accesses the first type network in the visiting network, the terminal can be supported to access the second type network in the visiting network as soon as possible.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a method and communication equipment for supporting roaming.
Background
In the 5G network deployment, a 5G network in a Non-independent Networking (NSA) manner or a 5G network in an independent networking (SA) manner may be deployed. How to support a terminal of a 5G network which is in an NSA mode with respect to a home network to access the 5G network in a visited network as soon as possible is a technical problem to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a method for supporting roaming and communication equipment, which are used for solving the problem of how to support a terminal to access a second type network as soon as possible in a visiting network when the terminal roams to the visiting network simultaneously provided with a first type network and a second type network and the terminal accesses the first type network in the visiting network.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for supporting roaming, which is applied to a first communication device, and includes:
when a first condition is met, executing a first operation;
wherein the first operation is a first related operation of transferring the terminal from the first type network to the second type network;
the performing a first operation comprising at least one of:
sending first indication information; the first indication information is used for indicating the terminal to be transferred to a second type network;
rejecting an access request of a terminal;
the connection of the terminal is released.
In a second aspect, an embodiment of the present invention provides a method for supporting roaming, which is applied to a second communication device, and includes:
when a second condition is satisfied, executing a second operation;
wherein the second operation is a second related operation of transferring the terminal from the first type network to the second type network;
the performing a second operation comprising at least one of:
initiating the switching from the first type network to the second type network, wherein the target cell is the cell of the second wireless access network;
initiating a redirection terminal to a second type network;
the cell is reselected to a cell of the second type radio access network.
In a third aspect, an embodiment of the present invention provides a method for supporting roaming, which is applied to a second communication device, and includes:
sending second indication information;
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for the first service, whether the terminal is prone to the first service, and whether the terminal is prone to camp on the first type network.
In a fourth aspect, an embodiment of the present invention provides a communication device, where the communication device is a first communication device, and the communication device includes:
the first execution module is used for executing a first operation when a first condition is met;
wherein the first operation is a first related operation of transferring the terminal from the first type network to the second type network;
the performing a first operation comprising at least one of:
sending first indication information; the first indication information is used for indicating the terminal to be transferred to a second type network;
rejecting an access request of a terminal;
the connection of the terminal is released.
In a fifth aspect, an embodiment of the present invention provides a communication device, where the communication device is a first communication device, and the communication device includes:
the second execution module is used for executing a second operation when a second condition is met;
wherein the second operation is a second related operation of transferring the terminal from the first type network to the second type network;
the performing a second operation comprising at least one of:
initiating the switching from the first type network to the second type network, wherein the target cell is the cell of the second wireless access network;
initiating a redirection terminal to a second type network;
the cell is reselected to a cell of the second type radio access network.
In a sixth aspect, an embodiment of the present invention provides a communication device, where the communication device is a first communication device, and the communication device includes:
the sending module is used for sending second indication information;
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for the first service, whether the terminal is prone to the first service, and whether the terminal is prone to camp on the first type network.
In a seventh aspect, an embodiment of the present invention provides a communication device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the method for supporting roaming provided in the first aspect, or implements the steps of the method for supporting roaming provided in the second aspect, or implements the steps of the method for supporting roaming provided in the third aspect.
In an eighth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for supporting roaming provided in the first aspect, or implements the steps of the method for supporting roaming provided in the second aspect, or implements the steps of the method for supporting roaming provided in the third aspect.
It is understood that, by the embodiment of the present invention, when the terminal roams to a visited network having both a first type network and a second type network, the terminal can be supported to access the second type network as soon as possible in the visited network when the terminal accesses the first type network in the visited network.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart illustrating a method for supporting roaming according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for supporting roaming according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for supporting roaming according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a roaming procedure supported in application scenario 1 according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a roaming procedure supported in application scenario 2 according to an embodiment of the present invention;
fig. 6 is a block diagram of a communication device provided by the present invention;
fig. 7 is a block diagram of another communication device provided by the present invention;
fig. 8 is a block diagram of another communication device provided by the present invention;
fig. 9 is a block diagram of another communication device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The core network of the 4G network is EPC and the radio access network is EUTRA.
The core network of the 5G network in the NSA mode is EPC; MCG is LTE; SCG is NR.
The core network of the SA mode 5G network is 5 GC; the radio access network is NG RAN; the NG RAN may include at least one of: eLTE, NR. Among them, LTE connected to 5GC may be referred to as LTE.
MCG for NSA is a frequency bin of LTE type. The radio frequency point of the SA 5G network may be an NR or LTE (or LTE type). Even if the home operator and the visited operator have a roaming agreement from the 5G network to the 5G network, when the home network is a terminal roaming in the NSA 5G network, the frequency point of the previous camping type, that is, the LTE frequency point, is preferentially selected. In order to support the 5G network of the NSA mode or the 5G network of the SA mode to quickly access the roaming network when the terminal roams, the following problems need to be solved:
problem 1: the operator of the access network deploys both a 4G network and a 5G network, and the 5G network is an SA method. When a terminal of a 5G network subscribing an NSA mode roams, an LTE frequency point is preferentially selected, so that the terminal can be attached to a 4G network. But the home operator and the visited operator tend to have a roaming agreement from 5G network to 5G network. How to quickly bring a terminal into a 5G network of a visited network is a problem that needs to be solved at present.
Problem 2: an operator accessing a network deploys a 4G network, an NSA-based 5G network, and an SA-based 5G network at the same time. When a terminal of a 5G network subscribing an NSA mode roams, an LTE frequency point is preferentially selected, so that the terminal can be attached to a 4G network or an NSA network. But the home operator and the visited operator tend to have a roaming agreement from 5G network to 5G network. How to quickly bring a terminal into an SA-mode 5G network of a visited network is a problem to be solved at present.
Problem 3: when a terminal roams into one type of network (4G or NSA network) of a visited network operator, the existing first type of network (e.g. 4G or NSA network) does not immediately transfer the terminal to the second type of network (e.g. SA-mode 5G network) of the visited network operator.
Problem 4: the 5G network of the visited network realizes the voice service by an EPS rollback mode. The terminal needs to stay in the EPS.
In this embodiment of the present invention, optionally, the obtaining may be understood as obtaining from configuration, receiving after a request, obtaining by self-learning, deriving from unreceived information, or obtaining after processing received information, which may be determined according to actual needs, and is not limited in this embodiment of the present invention. For example, when a certain capability indication sent by the device is not received, it can be deduced that the device does not support the capability.
Optionally, the sending may include broadcasting, broadcasting in a system message, and returning after responding to the request.
In an alternative embodiment of the invention, the first type network may comprise at least one of: EPS, EPC, LTE, EUTRAN, EUTRA, and MCG are LTE networks, NSA-type 5G networks, and 4G networks. LTE may also be referred to as EUTRA or EUTRAN.
In an alternative embodiment of the invention, the third type of network may comprise at least one of: EPS, EPC, LTE, EUTRAN, EUTRA, and MCG are LTE networks and NSA 5G networks. LTE may also be referred to as EUTRA or EUTRAN.
In an alternative embodiment of the invention, the second type of network may comprise at least one of: 5GS, 5GC, NR, eLTE, SA mode 5G network.
In an alternative embodiment of the invention, the first type of radio access network may comprise at least one of: EUTRAN (may be referred to as LTE), LTE in the NSA type 5G network, NR in the NSA type 5G network, and a radio access network of the first type network.
In an alternative embodiment of the invention, the second type of radio access network may comprise at least one of: NGRAN, radio access network of the second type network.
In an alternative embodiment of the present invention, the first type of frequency point (or referred to as a first type of frequency band) may include one of the following: LTE frequency points, EUTRA frequency points, and LTE frequency points. LTE may also be referred to as EUTRA or EUTRAN.
In an alternative embodiment of the present invention, the second type of frequency point (or referred to as the first type of frequency band) may include one of the following: and NR frequency point. LTE may also be referred to as EUTR or EUTRA.
In an alternative embodiment of the invention, the capabilities of the terminal may comprise at least one of: network capabilities of the terminal, wireless capabilities of the terminal.
In an alternative embodiment of the invention, the capabilities of the terminal may include at least one of: 4G network capabilities (e.g., S1 mode NAS capabilities), 5G network capabilities (e.g., N1 mode NAS capabilities). 5G network capabilities for SA mode (e.g., N1 mode NAS capabilities), and 5G network capabilities for NSA mode (e.g., S1 mode NAS capabilities).
In an alternative embodiment of the invention, the wireless capabilities of the terminal may include at least one of: EUTRA wireless capability (also referred to as LTE capability), NR wireless capability.
In an alternative embodiment of the invention, the visited network may be one of: operator's network, Visited (Visited) PLMN, Visited SNPN (non-public network). The access network is an access network of the terminal. Operators may deploy multiple types of networks. The visited network may include multiple types of networks.
In an alternative embodiment of the present invention, the Home network may be a network of a terminal Home operator or a Home (Home) PLMN, a Home NPN (non-public network). The home network is the home network of the terminal.
In an alternative embodiment of the invention, the transferring the terminal to the second type network comprises one of: and immediately transferring the terminal to the second type network, and quickly transferring the terminal to the second type network.
In an embodiment of the present invention, the frequency point may also be referred to as a frequency band.
In an optional embodiment of the invention, the communication device may comprise at least one of: a communication network element and a terminal.
In an embodiment of the present invention, the communication network element may include at least one of the following: a core network element and a radio access network element.
In the embodiment of the present invention, the core network element (CN element) may include, but is not limited to, at least one of the following: core network equipment, core network nodes, core network functions, core network elements, Mobility Management Entity (MME), Access Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Serving Gateway (Serving GW, SGW), PDN Gateway (PDN Gateway), Policy control Function (Policy control Function, PCF), Policy and Charging rules Function (Policy and Charging rules Function, PCRF), GPRS service Support Node (Serving GPRS Support Node, SGSN), Gateway Support Node (Gateway GPRS Support Node, GGSN), Unified Data Management (UDM), Unified Data storage (uddata, subscriber server (HSS), Home HSS) and Application Function (AF).
In this embodiment of the present invention, the RAN network element may include, but is not limited to, at least one of the following: radio Access Network equipment, Radio Access Network nodes, Radio Access Network functions, Radio Access Network units, 3GPP Radio Access Networks, Non-3GPP Radio Access Networks, Centralized Units (CUs), Distributed Units (DU), base stations, evolved Node bs (eNB), 5G base stations (gNB), Radio Network Controllers (RNC), base stations (NodeB), Non-3GPP Inter Working functions (N3 IWF), Access Control (AC) nodes, Access Point (Access Point, AP) devices or Wireless Local Area Networks (WLAN) nodes, N3 IWF.
The Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved node b (eNB or e-NodeB) in LTE, and a 5G Base Station (gNB), and the embodiment of the present invention is not limited thereto.
In the embodiment of the present invention, the terminal may include a relay supporting the terminal function and/or a terminal supporting the relay function. The terminal may also be referred to as a terminal Device or a User Equipment (UE), where the terminal may be a Mobile phone, a tablet personal Computer (tablet personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and it should be noted that a specific type of the terminal is not limited in the embodiment of the present invention.
The core network element or 5GC network element of the 5GS may include, but is not limited to, at least one of: AMF, SMF, UPF, PCF, UDM, AF.
The network element of the NG RAN may include, but is not limited to, at least one of: eNB, gNB is connected to EUTRA of 5GC, New Radio (NR) of 5GC, Next Generation Radio Access Network (NGRAN), 5GC, Non-3GPP (Non-3GPP, N3GPP), and the like; the network elements of the 5G network may include, but are not limited to, at least one of: AMF, SMF, UPF, PCF, UDM, gNB, an eNB connected to an AMF, and the like.
The 4G network may comprise at least one of: 4G core network, 4G radio access network, EUTRA connected to EPC, EUTRA, LTE, EPS, etc.
The core network element or EPC network element of the EPS may include, but is not limited to, at least one of the following: MME, SGW, Packet Data Network Gateway (PGW), Home Subscriber Server (HSS), eNB, etc.
The network element of EUTRAN may include: and (3) eNB.
A method for supporting roaming according to an embodiment of the present invention is described below.
Referring to fig. 1, an embodiment of the present invention provides a method for supporting roaming, which is applied to a first communication device; the first communication device may be, but is not limited to, a CN network element (such as an MME) in a first type network (such as a first type network in a visited network); the method comprises the following steps:
step 11: when the first condition is satisfied, a first operation is performed.
Wherein the first operation is a first related operation of transferring the terminal from the first type network to the second type network.
Optionally, the first type network and the second type network are networks in a visited network of the terminal.
In one embodiment, the home network of the terminal is a third type of network. In one embodiment, the third type network is of the same type as the first type network. In another embodiment, the third type network is of a different type than the first type network. For example, a network of the NSA scheme is different from an LTE network in network type, but the frequency points are the same in frequency point type and are all LTE frequency points (the frequency points may also be referred to as frequency bands).
Optionally, the performing a first operation includes at least one of:
sending first indication information; wherein the first indication information is used for indicating to transfer the terminal to a second type network;
rejecting access requests (such as attach requests, TAU requests, registration requests) of the terminal;
the connection of the terminal is released (this connection includes the RRC connection).
In one embodiment, the first indication information is used to indicate immediate transfer of the terminal to the second type network.
In one embodiment, the first indication information may be sent to a target, and the target may include at least one of: RAN network element (such as eNB), terminal.
In one embodiment, after receiving the access request of the terminal, the first indication information may be sent to the target terminal after waiting for a duration. It will be appreciated that the terminal will most likely initiate the first service after the roaming site (e.g., airport landing) is powered on. The first communication devices in the vicinity of these roaming places (e.g. airports) may be set for a reasonable period of time. And if the first service is not established when the time length expires, sending first indication information. Otherwise, when receiving the first service establishment (e.g., bearer establishment with QCI ═ 1) request, the first indication information is not sent. In areas outside these roaming places, the duration may not need to be set.
In one embodiment, the first indication information may be included in at least one message: an initial UE context message, a downlink NAS transport message, an access reject message (such as attach reject, TAU reject, registration reject), a UE context modification command message, and a UE context release command message. It will be appreciated that in order to transfer the terminal to the second type network as quickly as possible, the access request of the terminal may be directly denied. In this way, the terminal can directly select to the second type network according to the first indication information. However, this approach requires the terminal to perform cell selection by itself, which may be a long delay. Another way is to initiate an initial UE context message, establishing a terminal context on the RAN network element. And the RAN network element configures the terminal to measure. And after measuring the appropriate second type network cell, switching the terminal to the second type network.
Optionally, the first condition includes at least one of:
the terminal is a roaming terminal;
the network indicated by the home network identifier (such as PLMN ID or SNPN ID) of the terminal is a third type network (such as a 5G network in LTE, EPS, EUTRAN, NSA mode);
the frequency point indicated by the home network identifier (such as PLMN ID or SNPN ID) of the terminal is a first type frequency point (such as LTE);
the terminal supports a second type network;
the terminal supports NAS capability in an N1 mode (such as NAS signaling in an N1 mode);
the terminal supports NR type radio capability, and/or EUTRA radio capability (may also be referred to as LTE or LTE radio capability);
the home network and the visited network of the terminal have the following roaming agreement: allowing roaming from the third type of network of the home network to the second type of network of the visited network;
the terminal is not an access request initiated for a first service (such as a voice service or an emergency service);
the terminal does not have a first service tendency;
the terminal tends not to camp on the first type network;
the mode of the second type network for supporting the first service is not an EPS FB mode or supports voice bearing at a new air interface VoNR;
the mode of the second type network supporting the first service is an EPS FB mode, and the terminal is not of a type (such as Voice center) that takes Voice as the first service;
the second type network supports the first service in an EPS FB manner, and the terminal is of a Data-first type (e.g., Data center).
Optionally, before step 41, the method further includes:
receiving second indication information:
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for a first service, whether the terminal has a first service propensity, and whether the terminal tends to camp on a first type network.
Optionally, the first service is at least one of the following:
a voice service;
emergency services.
In one embodiment, when the terminal is not an access request initiated for the first service, the terminal does not have a first service propensity, and the terminal does not tend to camp on the first type network, the terminal may be transferred to the second type network as soon as possible.
It will be appreciated that with this embodiment, when a terminal roams to a visited network having both a first type network and a second type network, the terminal can be supported to access the second type network as soon as possible on the visited network when the terminal accesses the first type network on the visited network.
Referring to fig. 2, an embodiment of the present invention provides a method for supporting roaming, which is applied to a second communication device; the second communication device may be, but is not limited to, a RAN network element (such as an eNB) in a first type network (such as a first type network of a visited network), a terminal; the method comprises the following steps:
step 21: when the second condition is satisfied, a second operation is performed.
Wherein the second operation is a second related operation of transferring the terminal from the first type network to the second type network.
Optionally, the first type network and the second type network are networks in a visited network of the terminal.
Optionally, the performing a second operation includes at least one of:
initiating a handover of the first type network to a second type network (e.g., an S1 handover) and the target cell is a cell of a second radio access network (e.g., a NG RAN);
initiating redirection of the terminal to a second type of network (e.g., a second type radio access network);
the cell is reselected to a cell of the second type radio access network.
In one embodiment, initiating redirection of the terminal to the second type of network comprises: and releasing the RRC connection of the terminal, wherein the RRC connection release comprises the redirected frequency point. And the second type frequency point (such as NR frequency point) in the redirection frequency points has the highest priority.
In one embodiment, when a redirection terminal is initiated to a second type network, RRC connection of the terminal may be released, and a frequency point for terminal redirection is indicated as an NR frequency point, or the priority of the NR frequency point in the redirected frequency points is indicated to be the highest.
In one embodiment, when the second communication device is a RAN network element, the second operation may include at least one of:
initiating a handover of the first type network to a second type network (e.g., an S1 handover) and the target cell is a cell of a second radio access network (e.g., a NG RAN);
initiating redirection of the terminal to a second type of network (e.g., a second type radio access network);
in another embodiment, when the second communication device is a terminal, the second operation may include: the cell is reselected to a cell of the second type radio access network.
Optionally, the second condition includes at least one of:
bearers or bearer setup requests without a QoS class indication (e.g., QCI) of 1 and/or 5;
receiving first indication information about the terminal; the first indication information is used for indicating the terminal to be transferred to a second type network;
the terminal supports a second type network;
the terminal supports a first type network;
the terminal supports NR type radio capability, and/or EUTRA radio capability (may also be referred to as LTE or LTE radio capability);
there is a neighborhood of a second type radio access network, e.g. a NG RAN.
In one embodiment, the instructing to transfer the terminal to the second type network comprises: and immediately transferring the terminal to the second type network and quickly transferring the terminal to the second type network.
In one embodiment, the second operation is performed immediately or at an accelerated speed when the first indication information about the terminal is received.
It should be noted that when there is a QoS class indication (such as QCI) of 1 and/or 5 bearer or a bearer establishment request, it is indicated that there is a first service requirement, and if the roaming network is a voice service supported by EPS FB, the terminal is not immediately switched to 5GS at this time, and the terminal is kept in the EPS.
It will be appreciated that with this embodiment, when a terminal roams to a location of a visited network having both a first type network and a second type network, the terminal can support the transfer of the terminal to the second type network of the visited network as soon as possible when the terminal accesses the first type network at the visited network.
Referring to fig. 3, an embodiment of the present invention provides a method for supporting roaming, which is applied to a third communication device; the second communication device may be, but is not limited to: a terminal, a RAN network element (such as an eNB) in a first type network; the method comprises the following steps:
step 31: and sending the second indication information.
Wherein the second indication information may be used to indicate one of: whether the terminal is an access request initiated for the first service, whether the terminal is prone to the first service, and whether the terminal is prone to camp on the first type network.
Optionally, the first service is at least one of the following:
a voice service;
emergency services.
In one embodiment, the terminal acquires the first service tendency information according to the service attempt of the user. For example, when the user just starts up, the user tries to initiate a voice service, so that the user is known to have a tendency to perform a first service. When the terminal does not have the first service propensity, the visited network may transfer the terminal to the second type network as soon as possible.
In one embodiment, when the terminal has a first service propensity, the terminal may set the second network indication to be that the terminal does not tend to camp on the first type network
In one embodiment, the second indication is included in an access request message (e.g., attach request, TAU request, registration request, etc.).
In one embodiment, the terminal may directly send the second indication information to the CN network element or the RAN network element. In another embodiment, the terminal may send the second indication information to the RAN network element, and the RAN network element sends the second indication information to the CN network element.
It can be understood that, by sending the second indication information, the corresponding network element can know whether the terminal initiates the access request for the first service, so that under the condition of meeting the condition, the terminal can be supported to transfer to the second type network in the visited network as soon as possible.
The method for supporting roaming according to the embodiment of the present invention is described below with reference to a specific application scenario.
Application scenario 1 of the embodiment of the present invention:
an application scenario 1 of the embodiment of the present invention takes UE as an example, and mainly describes a process of quickly transferring to a 5GS (e.g., SA network) network after the UE (which may be roaming UE) requests to register an EPS network (e.g., 4G or NSA network), please refer to fig. 4, which includes the following steps:
step 41: the UE sends an access request message to the access network MME.
The access REQUEST message may be selected as an attach REQUEST message, a location update REQUEST message, or a tracking area update REQUEST (TAU REQUEST) message.
The access request may include second indication information (as shown in the embodiment of fig. 1).
Step 42: and performing security authentication between the UE and the MME of the visited network, and performing security authentication between the MME of the visited network and the HSS of the home network.
Step 43: the visited network MME initiates a location Update request (Update location request) procedure to the home network HSS.
Step 44: optionally, the visited network MME sends a Create session request (Create SessionRequest) message to the visited network SGW.
Step 45: optionally, the visited network SGW sends a Create session request (Create SessionRequest) message to the home network PGW.
Step 46: optionally, the home network PGW returns a Create session response (Create session response) message to the visited network SGW.
Step 47: optionally, the visited network SGW returns a Create session response (Create session response) message to the visited network MME.
And 48: optionally, when the first condition is satisfied, the visited network MME performs a first operation of transferring the UE to the 5 GS.
Wherein, the first condition is as described in the first condition of the embodiment of fig. 1, and is not described herein again.
Optionally, the performing the first operation of transferring the UE to the 5GS includes at least one of:
sending first indication information, wherein the first indication is used for indicating to transfer the UE to the 5 GS.
In one embodiment, the first indication information is transmitted to a RAN network element (e.g., EUT RAN).
In one embodiment, the first indication information may be included in an initial context setup request message or a downlink NAS transport message.
When the second condition is satisfied, the RAN network element performs a second operation of transferring the UE to the 5 GS.
The second condition is as described in the second condition of the embodiment in fig. 2, and is not described herein again.
Optionally, the performing the second operation of transferring the UE to the 5GS includes:
initiating S1 handover, wherein the target cell is NG RAN;
and initiating UE redirection. Namely, the RRC connection of the UE is released, and the redirected frequency point is indicated to be the frequency point of the NG RAN or the frequency point priority of the NG RAN is set to be the highest.
Wherein the NR RAN comprises at least one of: NR network, lte network.
Application scenario 2 of the embodiment of the present invention:
an application scenario 2 of the embodiment of the present invention takes UE as an example, and mainly describes a process in which UE is rejected after roaming to request registration to an EPS network (e.g., a 4G or NSA network), so that UE is quickly transferred to a 5GS (e.g., an SA network) network, as shown in fig. 5, the method includes the following steps:
step 51: the UE sends an access request message to the access network MME.
The access REQUEST message may be selected as an attach REQUEST message, a location update REQUEST message, or a tracking area update REQUEST (TAU REQUEST) message.
The access request may include second indication information (as shown in the embodiment of fig. 1).
Step 52: and when the first condition is met, the access network MME returns an access rejection message to the UE.
The access reject message may optionally include second indication information. The first indication information is as described in the embodiment of fig. 1, and is not described herein again.
Wherein, the first condition is as described in the first condition of the embodiment in fig. 1, and is not described herein again.
Referring to fig. 6, an embodiment of the present invention provides a communication device, where the communication device is a first communication device, and as shown in fig. 6, the communication device 60 includes:
a first executing module 61, configured to execute a first operation when a first condition is satisfied;
wherein the first operation is a first related operation of transferring the terminal from the first type network to the second type network;
the performing a first operation comprising at least one of:
sending first indication information; the first indication information is used for indicating the terminal to be transferred to a second type network;
rejecting an access request of a terminal;
the connection of the terminal is released.
Optionally, the first type network and the second type network are networks in a visited network of the terminal.
Optionally, the first condition includes at least one of:
the terminal is a roaming terminal;
the network indicated by the home network identifier of the terminal is a third type network;
the frequency point indicated by the home network identifier of the terminal is a first type frequency point;
the terminal supports a second type network;
the terminal supports NAS capability of an N1 mode;
the terminal supports an NR type wireless capability network, and/or EUTRA wireless capability;
the home network and the visited network of the terminal have the following roaming agreement: allowing roaming from the third type of network of the home network to the second type of network of the visited network;
the terminal is not an access request initiated for the first service;
the terminal does not have a first service tendency;
the terminal tends not to camp on the first type network;
the mode of the second type network for supporting the first service is not an EPS FB mode or supports voice bearing at a new air interface VoNR;
the mode of the second type network for supporting the first service is an EPS FB mode, and the terminal is not in a type taking voice as the first type;
the mode of the second type network supporting the first service is an EPS FB mode, and the terminal is of a type taking data as a first type.
Optionally, the communication device 60 further includes:
a receiving module, configured to receive second indication information:
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for a first service, whether the terminal has a first service propensity, and whether the terminal tends to camp on a first type network.
Optionally, the first service is at least one of the following:
a voice service;
emergency services.
Optionally, the first type network includes at least one of:
EPS, EPC, LTE, EUTRAN, EUTRA, MCG are LTE network, 5G network of NSA mode, 4G network;
and/or the presence of a gas in the gas,
the second type of network comprises at least one of:
5GS, 5GC, NR, eLTE, SA mode 5G network.
In this embodiment, the communication device 60 can implement each process implemented in the method embodiment shown in fig. 1 of the present invention, and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
Referring to fig. 7, an embodiment of the present invention provides a communication device, where the communication device is a second communication device, and as shown in fig. 7, the communication device 70 includes:
a second executing module 71, configured to execute a second operation when a second condition is satisfied;
wherein the second operation is a second related operation of transferring the terminal from the first type network to the second type network;
the performing a second operation comprising at least one of:
initiating the switching from the first type network to the second type network, wherein the target cell is the cell of the second wireless access network;
initiating a redirection terminal to a second type network;
the cell is reselected to a cell of the second type radio access network.
Optionally, the first type network and the second type network are networks in a visited network of the terminal.
Optionally, the second condition includes at least one of:
receiving first indication information about the terminal; the first indication information is used for indicating the terminal to be transferred to a second type network;
no bearer or bearer establishment request with QoS class indication 1 and/or 5;
the terminal supports a second type network;
the terminal supports a first type network;
the terminal supports NR type radio capability, and/or EUTRA radio capability;
there is a neighborhood of the second type radio access network.
Optionally, the first type network includes at least one of:
EPS, EPC, LTE, EUTRAN, EUTRA, MCG are LTE network, 5G network of NSA mode, 4G network;
and/or the presence of a gas in the gas,
the second type of network comprises at least one of:
5GS, 5GC, NR, eLTE, SA mode 5G network.
In this embodiment, the communication device 70 can implement each process implemented in the method embodiment shown in fig. 2 of the present invention, and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
Referring to fig. 8, an embodiment of the present invention provides a communication device, where the communication device is a third communication device, and as shown in fig. 8, the communication device 80 includes:
a sending module 81, configured to send second indication information;
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for the first service, whether the terminal is prone to the first service, and whether the terminal is prone to camp on the first type network.
Optionally, the first service is at least one of the following:
a voice service;
emergency services.
In this embodiment, the communication device 80 can implement each process implemented in the method embodiment shown in fig. 3 of the present invention, and achieve the same beneficial effects, and for avoiding repetition, details are not described here again.
Referring to fig. 9, fig. 9 is a schematic structural diagram of another communication device according to an embodiment of the present invention, and as shown in fig. 9, a communication device 90 includes: a processor 91, a memory 92, and a computer program stored in the memory 92 and capable of running on the processor, where components in the communication device 90 are coupled together through a bus interface 93, and when executed by the processor 91, the computer program may implement each process implemented in the method embodiment shown in fig. 1, or implement each process implemented in the method embodiment shown in fig. 2, or implement each process implemented in the method embodiment shown in fig. 3, and may achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process implemented in the method embodiment shown in fig. 1, or implements each process implemented in the method embodiment shown in fig. 2, or implements each process implemented in the method embodiment shown in fig. 3, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (17)
1. A method for supporting roaming, applied to a first communication device, comprising:
when a first condition is met, executing a first operation;
wherein the first operation is a first related operation of transferring the terminal from the first type network to the second type network;
the performing a first operation comprising at least one of:
sending first indication information; the first indication information is used for indicating the terminal to be transferred to a second type network;
rejecting an access request of a terminal;
the connection of the terminal is released.
2. The method according to claim 1, characterized in that the first type network and the second type network are networks of a visited network of the terminal.
3. The method of claim 1, wherein the first condition comprises at least one of:
the terminal is a roaming terminal;
the network indicated by the home network identifier of the terminal is a third type network;
the frequency point indicated by the home network identifier of the terminal is a first type frequency point;
the terminal supports a second type network;
the terminal supports NAS capability of an N1 mode;
the terminal supports an NR type wireless capability network, and/or EUTRA wireless capability;
the home network and the visited network of the terminal have the following roaming agreement: allowing roaming from the third type of network of the home network to the second type of network of the visited network;
the terminal is not an access request initiated for the first service;
the terminal does not have a first service tendency;
the terminal tends not to camp on the first type network;
the mode of the second type network for supporting the first service is not an EPS FB mode or supports voice bearing at a new air interface VoNR;
the mode of the second type network for supporting the first service is an EPS FB mode, and the terminal is not in a type taking voice as the first type;
the mode of the second type network supporting the first service is an EPS FB mode, and the terminal is of a type taking data as a first type.
4. The method of claim 1, wherein when the first condition is satisfied, before performing the first operation, the method further comprises:
receiving second indication information:
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for a first service, whether the terminal has a first service propensity, and whether the terminal tends to camp on a first type network.
5. The method according to claim 3 or 4, wherein the first service is at least one of:
a voice service;
emergency services.
6. The method of claim 1, wherein the first type network comprises at least one of:
EPS, EPC, LTE, EUTRAN, EUTRA, MCG are LTE network, 5G network of NSA mode, 4G network;
and/or the presence of a gas in the gas,
the second type of network comprises at least one of:
5GS, 5GC, NR, eLTE, SA mode 5G network.
7. A method for supporting roaming, applied to a second communication device, comprising:
when a second condition is satisfied, executing a second operation;
wherein the second operation is a second related operation of transferring the terminal from the first type network to the second type network; the performing a second operation comprising at least one of:
initiating the switching from the first type network to the second type network, wherein the target cell is the cell of the second wireless access network;
initiating a redirection terminal to a second type network;
the cell is reselected to a cell of the second type radio access network.
8. The method according to claim 7, characterized in that the first type network and the second type network are networks of a visited network of the terminal.
9. The method of claim 7, wherein the second condition comprises at least one of:
receiving first indication information about the terminal; the first indication information is used for indicating the terminal to be transferred to a second type network;
no bearer or bearer establishment request with QoS class indication 1 and/or 5;
the terminal supports a second type network;
the terminal supports a first type network;
the terminal supports NR type radio capability, and/or EUTRA radio capability;
there is a neighborhood of the second type radio access network.
10. Method according to any of the claims 7 to 9, characterized in that said first type network comprises at least one of the following:
EPS, EPC, LTE, EUTRAN, EUTRA, MCG are LTE network, 5G network of NSA mode, 4G network;
and/or the presence of a gas in the gas,
the second type of network comprises at least one of:
5GS, 5GC, NR, eLTE, SA mode 5G network.
11. A method for supporting roaming, applied to a third communication device, the method comprising:
sending second indication information;
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for the first service, whether the terminal is prone to the first service, and whether the terminal is prone to camp on the first type network.
12. The method of claim 11, wherein the first service is at least one of:
a voice service;
emergency services.
13. A communication device, the communication device being a first communication device, comprising:
the first execution module is used for executing a first operation when a first condition is met;
wherein the first operation is a first related operation of transferring the terminal from the first type network to the second type network;
the performing a first operation comprising at least one of:
sending first indication information; the first indication information is used for indicating the terminal to be transferred to a second type network;
rejecting an access request of a terminal;
the connection of the terminal is released.
14. A communication device, the communication device being a second communication device, comprising:
the second execution module is used for executing a second operation when a second condition is met;
wherein the second operation is a second related operation of transferring the terminal from the first type network to the second type network; the performing a second operation comprising at least one of:
initiating the switching from the first type network to the second type network, wherein the target cell is the cell of the second wireless access network;
initiating a redirection terminal to a second type network;
the cell is reselected to a cell of the second type radio access network.
15. A communication device, the communication device being a third communication device, comprising:
the sending module is used for sending second indication information;
wherein the second indication information is used for indicating one of the following:
whether the terminal is an access request initiated for the first service, whether the terminal is prone to the first service, and whether the terminal is prone to camp on the first type network.
16. A communication device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of a method for supporting roaming according to one of claims 1 to 6, or implementing the steps of a method for supporting roaming according to one of claims 7 to 10, or implementing the steps of a method for supporting roaming according to claim 11 or 12.
17. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for supporting roaming of one of claims 1 to 6, or the steps of the method for supporting roaming of one of claims 7 to 10, or the steps of the method for supporting roaming of one of claims 11 or 12.
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