CN104105171B - Network selection policies are issued and network selecting method and equipment - Google Patents
Network selection policies are issued and network selecting method and equipment Download PDFInfo
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Abstract
Issued the embodiment of the invention discloses a kind of network selection policies and network selecting method and equipment, be related to wireless communication field, select the possibility of optimal network for data flow for improving terminal.In the present invention, access network node determines the bearer network selection strategy of data flow based on QoS, the bearer network selection strategy of the data flow of determination is handed down to terminal, terminal selects the bearer network of bearer network or switch data stream according to the bearer network selection strategy of data flow for the data flow of the terminal, so as to improve the possibility that terminal selects optimal network for data flow.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a method and equipment for issuing a network selection strategy and selecting a network.
Background
With the increase of user demand and the development of communication technology, more and more Wireless communication technologies and related networks are emerging, such as 2G/3G/4G mobile communication technologies and networks that can provide wide coverage, and wifi technologies and Wireless Local Area Network (WLAN) networks that can provide hotspot coverage. Therefore, a large number of different communication network coexistence scenarios, such as 2G/3G/4G network and WLAN coexistence scenarios, are also presented. When a User Equipment (UE) is under the coverage of a cellular network and a non-3GPP (non-3 GPP) network, the User Equipment (UE) may switch a data flow path between different networks, so as to achieve dual guarantees of network efficiency and User experience.
An Evolved Packet System (EPS) is a System that supports multiple access technologies and multiple inter-access mobility. In a multi-access scenario, the terminal may be under the common coverage of multiple third generation Partnership Project (3 GPP) and/or non-3GPP access networks. These access networks may use different access technologies, may belong to different operators, and may provide access to different core networks. As shown in fig. 1, in a scenario where a Universal Mobile Telecommunications System (UMTS)/Long Term Evolution (LTE) and WLAN network coexist, a plurality of Access Points (APs) of WLAN exist within a coverage area of a base station of UMTS/LTE (NodeB in UMTS, eNB in LTE). The coverage area of an access point is relatively small compared to the base station.
Under the above scenario, a network architecture for interworking UMTS/LTE and WLAN that has been supported at present is shown in fig. 2; the architecture is based on an S2c interface between a packet data Gateway (PDN Gateway) and the UE to enable interoperability. In the prior art, a terminal (UE based) based scheme is adopted to implement the interworking between UMTS/LTE and WLAN.
In the current heterogeneous network scenario, a UMTS/LTE network uses a WLAN for offloading (offload), and there are two main scenarios: 1) seamless offload (seamless offload), as shown in fig. 3 a; 2) a slotted shunt (non-seamless overflow), as shown in fig. 3 b.
Seamless offloading refers to connection between a WLAN and a 3GPP Core Network (CN), and after air interface offloading, a service still accesses the Core Network of 3GPP (including UMTS/LTE). And the split shunting means that the WLAN and the 3GPP CN are not connected, and after the air interface shunting, the service is directly accessed to the Internet and does not pass through the 3GPP CN.
The WLAN offloading may be a transfer of a part of bearers of the UE, or a transfer of all bearers of the UE. If it is a partial bearer transfer, the UE will have a connection to both UMTS/LTE and WLAN at the same time. If it is a transfer of all bearers, the UE has a connection only with the WLAN after the transfer.
Based on the above Network scenario and architecture, a Network Selection mechanism is currently implemented based on an Access Network Discovery and Selection Function (ANDSF) policy. Specifically, the architecture of communication between the ANDSF entity and the UE is shown in fig. 4, where the UE and the ANDSF entity interact through an S14 interface, which is an Internet Protocol (IP) based interface. The communication between the UE and the ANDSF entity has two modes, namely, a request (Pull) mode in which the UE actively sends a request to the ANDSF entity and a Push (Push) mode in which the ANDSF entity actively pushes information. ANDSF policies are relatively static.
The ANDSF entity provides network discovery and selection related information to the terminal based on operator policy, including the following three categories:
first, Inter-system mobility policy (ISMP);
ISMP is a set of operator defined rules and preference information that define whether to allow cross-system mobility, access technology type best suited to access Evolved Packet Core (EPC), different priorities of different access technologies, etc. The ISMP may be provisioned in the terminal, may be sent upon request by the terminal, or may be sent to the terminal by the ANDSF under some trigger. For example, ANDSF may issue a policy that prioritizes WLAN over LTE, such that when the terminal is under coverage of both, it will prefer WLAN system access.
Second, Access Network Discovery Information (ANDI);
the ANDSF may provide the terminal with a list of Access networks available in its vicinity that conform to the requested Access type and related parameters, such as Access technology (e.g., WLAN, Worldwide Interoperability for Microwave Access (WiMAX), etc.), radio Access network identification, carrier frequency, etc.
Third, Inter-System Routing Policy (ISRP);
ISRP contains some information needed for cross-system routing, which can be used for terminals with multiple radio Access interfaces, such as terminals supporting IP Flow Mobility (IFOM) or Multiple Access PDN Connectivity (MAPCON): a) deciding which available Access network to use for sending data when certain routing conditions are met, b) deciding when a certain Access network is disabled for a certain IP data flow and/or a certain Access Point Name (APN).
The existing protocol provides that the ANDSF entity selects the ISMP, ANDI and ISRP to be provided to the terminal according to the operator requirements and roaming agreements, and the ANDSF may provide the above three policies simultaneously or only some of them. The ANDSF may interact with some database in the operator network, such as a Home Subscriber Server (HSS), to obtain the required information.
When the terminal receives access network information available with a higher priority than the existing access network, the terminal should perform a discovery and reselection procedure to this high priority if the user allows it. When the terminal automatically selects an access network, it cannot access the EPC through the access network marked as barred in the ISMP.
In the prior art, although access network selection policies issued by a core network can be distinguished based on different data flows, the policies of the core network only can consider relatively static information such as operator tendency, tariff, user subscription information and the like, and the effect of selecting an optimal network for the data flows by the UE cannot be achieved.
Disclosure of Invention
The embodiment of the invention provides a network selection strategy issuing and network selection method and equipment, which are used for improving the possibility that a terminal selects an optimal network for a data stream.
A network selection strategy issuing method comprises the following steps:
the access network node determines a bearer network selection strategy of the data flow based on the quality of service (QoS);
the access network node issues the determined bearer network selection policy of the data stream to the terminal, so that the terminal selects a bearer network for the data stream of the terminal or switches the bearer network of the data stream according to the bearer network selection policy of the data stream.
A method of network selection, the method comprising:
a terminal receives a bearer network selection strategy of a data stream based on the QoS issued by an access network node;
and the terminal selects a bearer network for the data stream or switches the bearer network of the data stream according to the QoS of the data stream and the received bearer network selection strategy.
An access network device, the access network device comprising:
a determining unit, configured to determine a bearer network selection policy of a data flow based on a quality of service QoS;
and the issuing unit is used for issuing the determined bearer network selection strategy of the data stream to the terminal so that the terminal selects a bearer network for the data stream of the terminal or switches the bearer network of the data stream according to the bearer network selection strategy of the data stream.
A terminal, the terminal comprising:
a receiving unit, configured to receive a bearer network selection policy of a data stream based on a quality of service QoS, where the bearer network selection policy is issued by an access network node;
and the selection switching unit is used for selecting a bearer network for the data flow or switching the bearer network of the data flow according to the QoS of the data flow of the terminal and the received bearer network selection strategy.
In the scheme provided by the embodiment of the invention, an access network node determines a bearer network selection strategy of a data stream based on QoS (quality of service), and issues the determined bearer network selection strategy of the data stream to a terminal, and the terminal selects a bearer network or a bearer network for switching the data stream for the data stream of the terminal according to the bearer network selection strategy of the data stream.
Drawings
FIG. 1 is a diagram illustrating a coexistence scenario of UMTS/LTE and WLAN networks in the prior art;
FIG. 2 is a diagram of a network architecture for UMTS/LTE and WLAN interoperability in the prior art;
FIG. 3a is a schematic diagram illustrating a UMTS/LTE network utilizing WLAN for seamless offloading in the prior art;
FIG. 3b is a schematic diagram illustrating a UMTS/LTE network utilizing WLAN for slotted offloading in the prior art;
fig. 4 is a schematic diagram illustrating an architecture of communication between an ANDSF and a UE in the prior art;
FIG. 5 is a schematic flow chart of a method provided by an embodiment of the present invention;
FIG. 6 is a schematic flow chart of another method provided by the embodiments of the present invention;
fig. 7 is a schematic structural diagram of an access network device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to improve the possibility that the UE selects the optimal network for the data stream, the embodiment of the invention provides a network selection strategy issuing and network selection method.
Referring to fig. 5, the method for issuing the network selection policy provided by the access network side in the embodiment of the present invention includes the following steps:
step 50: the access network node determines a bearer network selection policy for the data flow based on quality of service (QoS); the access network node may specifically be a base station or a Radio Network Controller (RNC), etc.
Step 51: the access network node issues the determined bearer network selection policy of the data stream to the terminal, so that the terminal selects a bearer network for the data stream of the terminal or switches the bearer network of the data stream according to the bearer network selection policy of the data stream.
Specifically, in step 50, the access network node determines a bearer network selection policy of the data flow based on the QoS, and the following two methods may be specifically implemented:
firstly, an access network node classifies data flows according to QoS and determines a bearer network selection strategy for each class of data flows;
the above-mentioned access network node classifies the data stream according to QoS, and the specific implementation may be: the access network node classifies the data flow according to the QoS grade identification (QCI); correspondingly, the access network node issues the determined bearer network selection policy of the data stream to the terminal in step 51, which is specifically implemented as: the access network node issues the bearer network selection policy based on the QCI indication to the terminal, for example, the bearer network selection policy based on the QCI indication is in the specific form: QCI and bearer network selection policies corresponding to the QCI (bearer network selection policies corresponding to the QCI refer to bearer network selection policies determined for data flows corresponding to the QCI), for example, data flows of QCI =1, QCI =2, and QCI =3 are classified into one class, a bearer network selection policy determined for the class is to select an LTE network, data flows of other QCIs are classified into another class, a bearer network selection policy determined for the class is to select a WLAN network, and a bearer network selection policy for a data flow issued by an access network node to a terminal includes: QCI1, QCI2 and QCI3 and their corresponding bearer network selection policies: selecting an LTE network, and selecting the rest QCIs and the corresponding bearer networks thereof: selecting a WLAN network; for another example, the specific form of the bearer network selection policy based on the QCI indication is: a QCI threshold indicating that data flows corresponding to QCIs above the QCI threshold prefer 3GPP networks, and data flows corresponding to QCIs below the QCI threshold prefer WLAN networks; for another example, the specific form of the bearer network selection policy based on the QCI indication is: a QCI list (list), wherein the QCI list includes QCIs of data flows of preferred 3GPP networks, to indicate that data flows corresponding to QCIs in the QCIlist are preferred 3GPP networks, and data flows corresponding to QCIs not in the QCI list are preferred WLAN networks; the QCI list may include QCIs of data flows that prefer WLAN networks, to indicate that data flows corresponding to QCIs in the QCI list prefer WLAN networks, and data flows corresponding to QCIs not in the QCI list prefer 3GPP networks.
Or,
the above-mentioned access network node classifies the data stream according to QoS, and the specific implementation may be: the access network node classifies the data flow according to the service characteristics (including service attributes); correspondingly, the access network node in step 51 issues the determined bearer network selection policy of the data stream to the terminal, which is specifically implemented as: the access network node issues the bearer network selection policy based on the service characteristic indication to the terminal, for example, the bearer network selection policy based on the service characteristic indication is in the specific form: the service characteristics and the bearer network selection policy corresponding to the service characteristics, for example, data streams of voice services are classified into one class, a bearer network selection policy determined for the data streams is to select an LTE network, data streams of background services and stream services are classified into another class, a bearer network selection policy determined for the data streams of the another class is to select a WLAN network, and a bearer network selection policy of a data stream issued by an access network node to a terminal includes: voice service and its corresponding bearer network selection policy: selecting an LTE network, background class and stream class services and a corresponding bearer network selection strategy: selecting a WLAN network; for another example, the specific form of the bearer network selection policy based on the service characteristic indication is as follows: a service characteristic list (list), wherein the service characteristic list comprises service characteristics of data streams which are preferred to the 3GPP network, so as to indicate that the data streams with the service characteristics in the service characteristic list are preferred to the 3GPP network, and the data streams without the service characteristics in the service characteristic list are preferred to the WLAN network; the service characteristics list may include service characteristics of data streams that prefer the WLAN network, so as to indicate that data streams with service characteristics in the service characteristics list prefer the WLAN network, and data streams without service characteristics in the service characteristics list prefer the 3GPP network.
Second, the access network node determines a bearer network selection policy for a Dedicated Radio Bearer (DRB) of the terminal. Specifically, the method comprises the following steps:
when the access network node judges that the DRB needs to be switched to the WLAN network, the access network node determines a bearer network selection strategy of the DRB, wherein the bearer network selection strategy comprises indication information that the DRB needs to be transferred to the WLAN network.
In step 51, the access network node issues the determined bearer network selection policy of the data stream to the terminal, and may specifically issue the determined bearer network selection policy of the data stream to the terminal through a broadcast message or a dedicated signaling.
Preferably, after the access network node issues the determined bearer network selection policy of the data stream to the terminal through the broadcast message, the access network node re-determines the bearer network selection policy of the data stream, issues the re-determined bearer network selection policy of the data stream to the terminal, and notifies the terminal that the bearer network selection policy of the data stream is updated. Here, the method of updating the system information or a method different from the system information may be used to notify the terminal that the bearer network selection policy of the data stream is updated, and the method different from the system information updating includes adding a special indication to the paging message or a separately designed update notification method.
Preferably, if the access network node issues the determined bearer network selection policy of the data flow to the terminal through the dedicated signaling, before the access network node determines the bearer network selection policy of the data flow based on the QoS, the access network node receives at least one of information about WLAN capability, WLAN module activation information, information about interest in the WLAN, and a policy request signaling, which are reported by the terminal. That is, the access network node sends the bearer network selection policy of the data stream to the terminal after receiving the information reported by the terminal.
Of course, the access network node may also determine, according to the network condition and/or the location of the terminal, which terminals to send the bearer network selection policy for the data flow to.
Referring to fig. 6, an embodiment of the present invention is directed to a network selection method provided by a network side, including the following steps:
step 60: a terminal receives a bearer network selection strategy of a QoS-based data stream issued by an access network node;
step 61: and the terminal selects a bearer network for the data stream or switches the bearer network of the data stream according to the QoS of the data stream and the received bearer network selection strategy.
Specifically, the bearer network selection policy received by the terminal in step 60 may be: the access network node classifies the data flows according to QoS and then respectively determines a bearer network selection strategy for each class of data flows;
correspondingly, in step 61, the terminal selects a bearer network for the data flow or a bearer network for switching the data flow according to the QoS of its own data flow and the received bearer network selection policy, which may be specifically implemented as follows:
the terminal reads a bearer network selection strategy corresponding to the data stream of the service newly initiated by the terminal from the received bearer network selection strategy, and selects a bearer network for the data stream according to the read bearer network selection strategy; and/or the presence of a gas in the gas,
the terminal reads the bearer network selection strategy corresponding to the data flow of the established service from the received bearer network selection strategy, and switches the bearer network of the data flow according to the read bearer network selection strategy.
The above-mentioned access network node classifies the data flow according to QoS and then selects the tactics for the bearer network determined for each kind of data flow separately includes: a bearer network selection policy based on the QCI indication; or, a bearer network selection policy based on the traffic characteristic indication.
For example, when the bearer network selection policy respectively determined for each type of data stream after the access network node classifies the data stream according to QoS includes QCI and bearer network selection policies corresponding to QCI, the terminal reads the bearer network selection policy corresponding to QCI corresponding to the data stream of the service newly initiated by the terminal from the received bearer network selection policy, and selects a bearer network for the data stream according to the read bearer network selection policy; and/or the terminal reads the bearer network selection strategy corresponding to the QCI corresponding to the data flow of the established service from the received bearer network selection strategy, and switches the bearer network of the data flow according to the read bearer network selection strategy.
When the access network node classifies the data streams according to QoS and then respectively determines a bearer network selection strategy for each class of data streams to comprise service characteristics and bearer network selection strategies corresponding to the service characteristics, the terminal reads the bearer network selection strategy corresponding to the service characteristics corresponding to the service to which the data stream newly initiating the service belongs from the received bearer network selection strategies, and selects a bearer network for the data stream according to the read bearer network selection strategy; and/or the terminal reads the bearer network selection strategy corresponding to the service characteristics corresponding to the service to which the data stream of the established service belongs from the received bearer network selection strategy, and switches the bearer network of the data stream according to the read bearer network selection strategy.
Specifically, the bearer network selection policy received by the terminal in step 60 may also be: the access network node selects a strategy for the bearing network determined by the DRB of the terminal;
correspondingly, in step 61, the terminal selects a bearer network for the data flow or a bearer network for switching the data flow according to the QoS of its own data flow and the received bearer network selection policy, which may be specifically implemented as follows:
and the terminal switches the bearer network for the DRB according to the received bearer network selection policy. Specifically, the terminal determines whether the DRB needs to be switched to the WLAN network, if so, the DRB is switched to the WLAN network, otherwise, a rejection signaling is returned to the network side.
Specifically, in step 60, the terminal may receive, through a broadcast message or a dedicated signaling, a bearer network selection policy of the data stream based on the QoS, which is issued by the access network node.
Preferably, after the terminal receives the bearer network selection policy of the data stream based on QoS, which is issued by the access network node through the broadcast message, the terminal receives a notification message that the bearer network selection policy of the data stream issued by the access network node is updated; and receiving the updated bearer network selection strategy of the data stream issued by the access network node according to the notification message, and selecting a bearer network for the data stream or switching the bearer network of the data stream according to the updated bearer network selection strategy of the data stream.
Preferably, before the terminal receives the bearer network selection policy of the QoS-based data stream issued by the access network node through the dedicated signaling, the terminal reports at least one of the WLAN capability information, the WLAN module activation information, the WLAN interest information, and the policy request signaling to the access network node.
The invention is illustrated below with reference to specific examples:
the first embodiment is as follows: broadcasting a QoS-based data flow bearer network selection policy;
in this embodiment, taking an LTE system and a WLAN system as examples, a procedure of notifying the UE of the QoS-based data stream bearer network selection policy by the network and an operation procedure of the UE are described.
A network side:
the eNB node works out QoS-based data flow bearing network selection strategies according to the comprehensive conditions of the load of the eNB node and a relay link (backhaul) and the like, and considering the load and the comprehensive conditions of the WLAN AP under the coverage of the eNB node or the adjacent WLAN AP, and the QoS-based data flow bearing network selection strategies are sent to the UE in a broadcast form, for example, in the system information, the QoS-based data flow bearing network selection strategies can be changed, that is, the QoS-based data flow bearing network selection strategies can be changed along with the change of the conditions of the eNB node and the AP, the change of the QoS-based data flow bearing network selection strategies is notified to the UE in a mode similar to the updating of the system information, furthermore, in order to reduce the influence on the traditional UE, the UE can be notified about the change of the QoS-based data flow bearing network selection strategies in a mode different from the updating of the system information, such as a special indication in a paging message or a separately, so that only UEs that are WLAN capable and/or have a WLAN module on and/or are interested in WLAN will listen for system information and updates thereof related to QoS-based data flow bearer network selection policies.
The specific strategy is described as follows:
the QoS-based data flow bearer network selection policy may be cell-based, e.g., using the same set of QoS-based data flow bearer network selection policies throughout the cell; or based on each different AP, that is, each AP has its own QoS-based data flow bearer network selection policy;
the QoS-based data flow carrying network selection policy can be in the form of a QCI-based data flow carrying network selection policy, for example, a data flow with QCI =1 or 2 or 3, which suggests to select LTE network transmission, and data flows with other QCI classes can select WLAN link transmission if allowed by AP signals; or for example, data streams with QCI =6, 7, 8, 9, it is suggested that WLAN link transmission is preferred if allowed by AP signal, and data streams with remaining QCI classes may be selected for LTE network transmission; and so on.
The QoS-based data flow bearer network selection policy may also be described in terms of service characteristics, for example, Voice-type services such as VoIP suggest that LTE networks are preferred, or delay-sensitive services that have low rate requirements suggest that LTE networks are preferred, or delay-insensitive services that non-GBR services suggest that WLAN networks are preferred, or background-type and flow-type services that WLAN networks are preferred, and may also suggest that WLAN networks are preferred for services that have a rate threshold, for example, GBR rate requirements above 64kbps, and so on.
Other forms of QoS description can also be used for the QoS-based data flow to carry the content of the network selection policy, as long as the UE can clearly understand the meaning of the network-side policy, and various QoS description manners existing in the standard or any combination thereof can be used, or a newly defined classification manner can be newly added in the standard.
The UE side:
the UE side may decide whether to receive the QoS-based data stream bearer network selection policy based on its own condition, for example, a UE with WLAN capability and/or WLAN module turned on and/or interested in WLAN receives the QoS-based data stream bearer network selection policy;
step 1: the UE reads a QoS-based data stream bearer network selection strategy;
step 2: the UE searches for a WLAN network suitable for access;
and step 3: and the UE carries out corresponding network selection operation on the data streams with different QoS characteristics of the newly-initiated service or carries out network access switching on the established data streams according to the QoS-based data stream bearer network selection strategy corresponding to the available AP.
Or, the UE may have another execution step, which is to swap the above step 1 and step 2, that is, the UE only obtains the QoS-based data stream bearer network selection policy when there is a WLAN network available around, and the subsequent execution step is not changed.
In step 3, the UE performs network selection and handover operations, which is a UE-triggered procedure, and may be a direct signaling interaction with a core network node, such as a P-GW, without affecting the RAN procedure.
In the first embodiment to the third embodiment, the UE refers to the QoS-based data flow bearer network selection policy issued by the eNB, and finally, the factors such as cost and user preference need to be comprehensively considered to comprehensively determine whether to perform data flow distribution to the WLAN.
Example two: dedicated signaling informs the QoS-based data flow of the network selection policy;
in this embodiment, taking an LTE system and a WLAN system as examples, a process of notifying the UE of the QoS-based data stream bearer network selection policy by the network and an operation process of the UE will be described.
A network side:
the eNB determines when to send the QoS-based data stream bearer network selection policy to the UE according to the conditions of the self load, the AP load, and the like, and in consideration of the state of the UE, specifically:
the UE needs to report information that the UE has WLAN capability and/or a WLAN module is started and/or is interested in the WLAN; the network sends a QoS-based data stream bearer network selection policy to the UE that satisfies the above conditions, where the specific trigger may be a network self-decision, for example, once the UE enters a connected state and the QoS-based data stream bearer network selection policy is updated, the QoS-based data stream bearer network selection policy is sent to the UE, or based on the UE location, the QoS-based data stream bearer network selection policy is sent only to the UE near the AP, or based on the UE reporting, for example, after the UE searches for an available WLAN signal, the QoS-based data stream bearer network selection policy is sent to the UE when the UE requests the policy;
the network may determine whether to send a QoS-based data stream bearer network selection policy to the UE according to a policy condition of the UE, for example, if the UE has only a voice service, the UE may be kept in the LTE network without sending the QoS-based data stream bearer network selection policy to the UE, and if the UE has only an internet service, the QoS-based data stream bearer network selection policy may be sent to the UE, that is, the UE is suggested to switch its access network to the WLAN network.
See embodiment one for a specific form of QoS-based data flow bearer network selection policy.
The UE side:
step 1: the UE needs to report its own state to the network side, for example, when interested in WLAN, reports the information to the network while piggybacking the information in the existing signaling or new signaling process;
step 2: the network sends a QoS-based data flow bearer network selection strategy carried by a special signaling to the UE;
and step 3: and the UE refers to the QoS-based data stream bearer network selection strategy to perform network selection and switching operation of the data stream.
The information reported by the UE may be an update of a real-time status, for example, reporting that the UE is interested in the WLAN when entering a connected state, or may be sent again when an available AP can be searched.
In this embodiment, the UE may not report, and the network selects the UE by using a certain algorithm, for example, considering that the Wifi function is relatively popular, and may directly send a QoS-based data stream bearer network selection policy to all UEs located near the AP.
Example three: the special signaling informs the DRB of the routing information;
in this embodiment, taking an LTE system and a WLAN system as examples, a process of notifying the UE of the QoS-based data stream bearer network selection policy by the network and an operation process of the UE will be described.
A network side:
step 1: the network receives the report of the UE, and the reported information can be the WLAN module starting or searching for available AP;
step 2: the network judges whether the existing DRB of the UE needs to be subjected to route conversion aiming at the comprehensive conditions of self load, corresponding AP load, DRB combination of the UE and the like, namely, part or all of the DRB is transferred to the WLAN network, and if so, corresponding information is sent to the UE in a special signaling mode. For example, the UE has two existing DRBs to transmit VoIP and FTP services, respectively, and the network may propose to switch the DRB2 corresponding to the FTP service to the WLAN network.
The UE side:
step 1: when the WLAN is interested or available APs are searched, reporting the information to the network;
step 2: receiving a routing conversion signaling about DRB at a network side, and referring to the routing conversion signaling to switch a data stream corresponding to the corresponding DRB to the WLAN, wherein the switching process is initiated by the UE, and the path switching of the corresponding data stream is completed through signaling interaction with a core network node.
In this embodiment, the UE may not report, and the network selects the UE by using a certain algorithm, for example, it is considered that the Wifi function is relatively popular, and the routing switching signaling may be directly sent to all UEs located near the AP.
Example four: the special signaling informs the DRB of the switching information;
in this embodiment, taking an LTE system and a WLAN system as examples, a description is given of a network notifying a UE of a QoS-based data flow bearer network selection policy, and an operation process of the UE.
In the scenario involved in this embodiment, the eNB may control the AP by considering that the eNB and the AP are co-located or have a direct interface.
A network side:
step 1: the network receives the reported information of the UE, and the reported information can be used for starting the WLAN module or searching available APs;
step 2: the network judges whether the existing DRB of the UE needs to be switched or not according to the comprehensive conditions of the load of the network, the load of the corresponding AP, the DRB combination of the UE and the like, namely, part or all of the DRB are switched to the WLAN network, and if so, the corresponding switching command is sent to the UE. For example, the UE has two existing DRBs to transmit VoIP and FTP services, respectively, and the network may propose to switch the DRB2 corresponding to the FTP service to the WLAN network.
The UE side:
step 1: when the WLAN is interested or available APs are searched, reporting the information to the network;
step 2: receiving a DRB switching signaling of a network side, considering whether to perform DRB switching or not by combining other factors such as cost, user preference and the like, if the DRB switching is agreed, switching a data stream corresponding to the corresponding DRB to a WLAN (wireless local area network) for transmission, and returning a switching completion signaling to the network side; if the UE does not agree to the switch, the rejection signaling is returned to the network side, and the existing DRB transmission is kept.
Referring to fig. 7, an embodiment of the present invention provides an access network device, where the access network device includes:
a determining unit 70, configured to determine a bearer network selection policy of a data flow based on the quality of service QoS;
the issuing unit 71 is configured to issue the determined bearer network selection policy of the data flow to the terminal, so that the terminal selects a bearer network for the data flow of the terminal or switches the bearer network of the data flow according to the bearer network selection policy of the data flow.
Further, the determining unit 70 is configured to:
classifying the data streams according to QoS, and respectively determining a bearer network selection strategy for each class of data streams; or,
a bearer network selection policy is determined for a dedicated radio bearer DRB of the terminal.
Further, the determining unit 70 is configured to: the data streams are classified as follows: classifying the data flow according to the QoS grade identification QCI;
the issuing unit 71 is configured to: and issuing the load-bearing network selection strategy based on the QCI indication to the terminal.
Further, the determining unit 70 is configured to: the data streams are classified as follows: classifying the data stream according to the service characteristics;
the issuing unit 71 is configured to: and the bearing network selection strategy based on the service characteristic indication is issued to the terminal.
Further, the determining unit 70 is configured to: determining a bearer network selection policy for the DRB of the terminal according to the following method:
when the DRB is judged to need to be switched to a Wireless Local Area Network (WLAN) network, determining a bearer network selection strategy of the DRB, wherein the bearer network selection strategy comprises indication information that the DRB needs to be transferred to the WLAN network.
Further, the issuing unit 71 is configured to:
and transmitting the determined bearer network selection policy of the data stream to the terminal through a broadcast message or a dedicated signaling.
Further, the access network device further includes:
a notifying unit 72, configured to, after the issuing unit issues the determined bearer network selection policy of the data flow to the terminal through the broadcast message, re-determine the bearer network selection policy of the data flow, issue the re-determined bearer network selection policy of the data flow to the terminal, and notify the terminal that the bearer network selection policy of the data flow is updated.
Further, the access network device further includes:
a receiving unit 73, configured to receive at least one of WLAN capability information, WLAN module start information, WLAN interest information, and policy request signaling reported by the terminal before the determining unit determines the bearer network selection policy of the data flow based on the QoS if the issuing unit issues the determined bearer network selection policy of the data flow to the terminal through a dedicated signaling.
Referring to fig. 8, an embodiment of the present invention provides a terminal, where the terminal includes:
a receiving unit 80, configured to receive a bearer network selection policy of a data stream based on a quality of service QoS, where the bearer network selection policy is issued by an access network node;
a selecting and switching unit 81, configured to select a bearer network for the data flow or switch the bearer network of the data flow according to the QoS of the data flow of the terminal and the received bearer network selection policy.
Further, the bearer network selection policy received by the receiving unit 80 is: the access network node classifies the data flows according to QoS and then respectively determines a bearer network selection strategy for each class of data flows;
the selection switching unit 81 is configured to:
reading a bearer network selection strategy corresponding to a data stream of a new service initiated by the bearer network selection strategy from the received bearer network selection strategy, and selecting a bearer network for the data stream according to the read bearer network selection strategy; and/or the presence of a gas in the gas,
and reading the bearer network selection strategy corresponding to the data stream of the established service from the received bearer network selection strategy, and switching the bearer network of the data stream according to the read bearer network selection strategy.
Further, the bearer network selection policy received by the receiving unit 80 is: the access network node selects a strategy for the bearing network determined by the special radio bearing DRB of the terminal;
the selection switching unit 81 is configured to: and switching the bearer network for the DRB according to the received bearer network selection strategy.
Further, the network access node classifies the data flows according to QoS and then selects a policy for the bearer network respectively determined for each class of data flows, including:
a bearer network selection policy based on the QCI indication; or,
bearer network selection policies based on traffic characteristic indications.
Further, the selection switching unit 81 is configured to: switching the bearer network for the DRB according to the received bearer network selection policy according to the following method:
and determining whether the DRB needs to be switched to the WLAN, if so, switching the DRB to the WLAN, and otherwise, returning a rejection signaling to a network side.
Further, the receiving unit 80 is configured to:
and receiving a bearer network selection strategy of the data stream based on the QoS issued by the access network node through a broadcast message or a special signaling.
Further, the terminal further includes:
a processing unit 82, configured to receive a notification message indicating that a bearer network selection policy of a data stream sent by an access network node is updated after the receiving unit receives, through a broadcast message, a bearer network selection policy of a data stream based on QoS sent by the access network node; and receiving the updated bearer network selection strategy of the data stream issued by the access network node according to the notification message, and selecting a bearer network for the data stream or switching the bearer network of the data stream according to the updated bearer network selection strategy of the data stream.
Further, the terminal further includes:
a reporting unit 83, configured to report at least one of WLAN capability information, WLAN module opening information, WLAN interest information, and policy request signaling to the access network node before the receiving unit receives a bearer network selection policy based on a QoS data stream issued by the access network node through a dedicated signaling.
In conclusion, the beneficial effects of the invention include:
in the scheme provided by the embodiment of the invention, an access network node determines a bearer network selection strategy of a data stream based on QoS (quality of service), and issues the determined bearer network selection strategy of the data stream to a terminal, and the terminal selects a bearer network or a bearer network for switching the data stream for the data stream of the terminal according to the bearer network selection strategy of the data stream.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (30)
1. A network selection strategy issuing method is characterized by comprising the following steps:
the method for determining the bearer network selection policy of the data stream based on the QoS by the access network node specifically comprises the following steps: the access network node classifies the data flows according to QoS and determines a bearer network selection strategy for each class of data flows respectively; or, the access network node determines a bearer network selection policy for a Dedicated Radio Bearer (DRB) of the terminal;
the access network node issues the determined bearer network selection policy of the data stream to the terminal, so that the terminal selects a bearer network for the data stream of the terminal or switches the bearer network of the data stream according to the bearer network selection policy of the data stream.
2. The method of claim 1, wherein the access network node classifies the data flows according to QoS, specifically comprising: the access network node classifies the data flow according to the QoS grade identification QCI;
the access network node issues the determined bearer network selection policy of the data stream to the terminal, and specifically includes: and the access network node issues the load network selection strategy based on the QCI indication to the terminal.
3. The method of claim 1, wherein the access network node classifies the data flows according to QoS, specifically comprising: the access network node classifies the data flow according to the service characteristics;
the access network node issues the determined bearer network selection policy of the data stream to the terminal, and specifically includes: the access network node issues the bearing network selection strategy based on the service characteristic indication to the terminal.
4. The method of claim 1, wherein the determining, by the access network node, the bearer network selection policy for the DRB of the terminal specifically includes:
when the access network node judges that the DRB needs to be switched to the WLAN, the access network node determines a bearer network selection strategy of the DRB, wherein the bearer network selection strategy comprises indication information that the DRB needs to be transferred to the WLAN.
5. The method according to any of claims 1-4, wherein the access network node issues the determined bearer network selection policy for the data flow to the terminal, specifically comprising:
and the access network node issues the determined bearer network selection strategy of the data stream to the terminal through a broadcast message or a special signaling.
6. The method of claim 5, wherein after the access network node issues the determined bearer network selection policy for the data flow to the terminal through a broadcast message, the method further comprises:
and the access network node re-determines the bearer network selection strategy of the data stream, issues the re-determined bearer network selection strategy of the data stream to the terminal, and informs the terminal that the bearer network selection strategy of the data stream is updated.
7. The method of claim 5, wherein if the access network node issues the determined bearer network selection policy for the data flow to the terminal through dedicated signaling, before the access network node determining the bearer network selection policy for the data flow based on the QoS, further comprising:
and the access network node receives at least one of WLAN capability information, WLAN module starting information, WLAN interest information and strategy request signaling which are reported by the terminal.
8. A method for network selection, the method comprising:
a terminal receives a bearer network selection strategy of data flow based on quality of service (QoS) issued by an access network node, wherein the bearer network selection strategy received by the terminal is a bearer network selection strategy respectively determined for each type of data flow after the access network node classifies the data flow according to the QoS, or the bearer network selection strategy received by the terminal is a bearer network selection strategy determined by an access network node as a special radio bearer (DRB) of the terminal;
and the terminal selects a bearer network for the data stream or switches the bearer network of the data stream according to the QoS of the data stream and the received bearer network selection strategy.
9. The method of claim 8, wherein the terminal selects a bearer network for the data flow or a bearer network for switching the data flow according to the QoS of its own data flow and the received bearer network selection policy, specifically comprising:
the terminal reads a bearer network selection strategy corresponding to the data stream of the service newly initiated by the terminal from the received bearer network selection strategy, and selects a bearer network for the data stream according to the read bearer network selection strategy; and/or the presence of a gas in the gas,
the terminal reads the bearer network selection strategy corresponding to the data flow of the established service from the received bearer network selection strategy, and switches the bearer network of the data flow according to the read bearer network selection strategy.
10. The method of claim 8, wherein the terminal selects a bearer network for the data flow or a bearer network for switching the data flow according to the QoS of its own data flow and the received bearer network selection policy, specifically comprising:
and the terminal switches the bearer network for the DRB according to the received bearer network selection strategy.
11. The method of claim 9, wherein the bearer network selection policy respectively determined for each type of data flow after the access network node classifies the data flows according to QoS comprises:
a bearer network selection policy based on the QCI indication; or,
bearer network selection policies based on traffic characteristic indications.
12. The method of claim 10, wherein the terminal, according to the received bearer network selection policy, switches the bearer network for the DRB, specifically comprising:
the terminal determines whether the DRB needs to be switched to the WLAN, if so, the DRB is switched to the WLAN, otherwise, a rejection signaling is returned to the network side.
13. The method according to any of claims 8-12, wherein the receiving, by the terminal, the bearer network selection policy for the QoS-based data flow delivered by the access network node specifically comprises:
the terminal receives the load network selection strategy based on the QoS data flow sent by the access network node through the broadcast message or the special signaling.
14. The method of claim 13, wherein after the terminal receives the bearer network selection policy for the QoS-based data flow delivered by the access network node through a broadcast message, the method further comprises:
the terminal receives a notification message for updating a bearer network selection strategy of a data stream issued by an access network node; and receiving the updated bearer network selection strategy of the data stream issued by the access network node according to the notification message, and selecting a bearer network for the data stream or switching the bearer network of the data stream according to the updated bearer network selection strategy of the data stream.
15. The method of claim 13, wherein before the terminal receives the bearer network selection policy for the QoS-based data flow delivered by the access network node through dedicated signaling, the method further comprises:
the terminal reports at least one of WLAN capability information, WLAN module starting information, WLAN interest information and strategy request signaling to the access network node.
16. An access network device, characterized in that the access network device comprises:
a determining unit, configured to determine a bearer network selection policy of a data flow based on a quality of service QoS, specifically including: classifying the data streams according to QoS, and respectively determining a bearer network selection strategy for each class of data streams; or, determining a bearer network selection policy for a Dedicated Radio Bearer (DRB) of the terminal;
and the issuing unit is used for issuing the determined bearer network selection strategy of the data stream to the terminal so that the terminal selects a bearer network for the data stream of the terminal or switches the bearer network of the data stream according to the bearer network selection strategy of the data stream.
17. The access network device of claim 16, wherein the determining unit is to: the data streams are classified as follows: classifying the data flow according to the QoS grade identification QCI;
the issuing unit is used for: and issuing the load-bearing network selection strategy based on the QCI indication to the terminal.
18. The access network device of claim 16, wherein the determining unit is to: the data streams are classified as follows: classifying the data stream according to the service characteristics;
the issuing unit is used for: and issuing the bearing network selection strategy based on the service characteristic indication to the terminal.
19. The access network device of claim 17, wherein the determining unit is to: determining a bearer network selection policy for the DRB of the terminal according to the following method:
when the DRB is judged to need to be switched to a Wireless Local Area Network (WLAN) network, determining a bearer network selection strategy of the DRB, wherein the bearer network selection strategy comprises indication information that the DRB needs to be transferred to the WLAN network.
20. The access network device according to any of claims 16-19, wherein the issuing unit is configured to:
and transmitting the determined bearer network selection policy of the data stream to the terminal through a broadcast message or a dedicated signaling.
21. The access network device of claim 20, wherein the access network device further comprises:
and the notification unit is used for re-determining the bearer network selection strategy of the data stream, issuing the re-determined bearer network selection strategy of the data stream to the terminal and notifying the terminal that the bearer network selection strategy of the data stream is updated after the issuing unit issues the determined bearer network selection strategy of the data stream to the terminal through the broadcast message.
22. The access network device of claim 20, wherein the access network device further comprises:
and the reporting unit is used for receiving at least one of WLAN capability information, WLAN module starting information, WLAN interest information and strategy request signaling reported by the terminal before the determining unit determines the bearer network selection strategy of the data flow based on the QoS if the issuing unit issues the determined bearer network selection strategy of the data flow to the terminal through the special signaling.
23. A terminal, characterized in that the terminal comprises:
a receiving unit, configured to receive a bearer network selection policy for a data flow based on QoS issued by an access network node, where the bearer network selection policy received by the receiving unit is a bearer network selection policy that is determined by the access network node after classifying the data flow according to QoS and is respectively for each type of data flow, or the bearer network selection policy received by the receiving unit is a bearer network selection policy that is determined by a dedicated radio bearer DRB that the access network node is a terminal;
and the selection switching unit is used for selecting a bearer network for the data flow or switching the bearer network of the data flow according to the QoS of the data flow of the terminal and the received bearer network selection strategy.
24. The terminal of claim 23, wherein the selection switching unit is configured to:
reading a bearer network selection strategy corresponding to a data stream of a new service initiated by the bearer network selection strategy from the received bearer network selection strategy, and selecting a bearer network for the data stream according to the read bearer network selection strategy; and/or the presence of a gas in the gas,
and reading the bearer network selection strategy corresponding to the data stream of the established service from the received bearer network selection strategy, and switching the bearer network of the data stream according to the read bearer network selection strategy.
25. The terminal of claim 23, wherein the selection switching unit is configured to: and switching the bearer network for the DRB according to the received bearer network selection strategy.
26. The terminal of claim 24, wherein the bearer network selection policy respectively determined for each type of data flow after the access network node classifies the data flows according to QoS comprises:
a bearer network selection policy based on the QCI indication; or,
bearer network selection policies based on traffic characteristic indications.
27. The terminal of claim 25, wherein the selection switching unit is configured to: switching the bearer network for the DRB according to the received bearer network selection policy according to the following method:
and determining whether the DRB needs to be switched to the WLAN, if so, switching the DRB to the WLAN, and otherwise, returning a rejection signaling to a network side.
28. The terminal according to any of claims 23-27, wherein the receiving unit is configured to:
and receiving a bearer network selection strategy of the data stream based on the QoS issued by the access network node through a broadcast message or a special signaling.
29. The terminal of claim 28, wherein the terminal further comprises:
the processing unit is used for receiving a notification message for updating the bearer network selection strategy of the data stream issued by the access network node after the receiving unit receives the bearer network selection strategy of the data stream based on the QoS issued by the access network node through the broadcast message; and receiving the updated bearer network selection strategy of the data stream issued by the access network node according to the notification message, and selecting a bearer network for the data stream or switching the bearer network of the data stream according to the updated bearer network selection strategy of the data stream.
30. The terminal of claim 28, wherein the terminal further comprises:
and the reporting unit is used for reporting at least one of WLAN capability information, WLAN module starting information, WLAN interest information and strategy request signaling to the access network node before the receiving unit receives the bearer network selection strategy of the QoS-based data flow sent by the access network node through the special signaling.
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| CN201310116412.7A CN104105171B (en) | 2013-04-03 | 2013-04-03 | Network selection policies are issued and network selecting method and equipment |
| PCT/CN2014/074623 WO2014161487A1 (en) | 2013-04-03 | 2014-04-02 | Method and device for sending network selection policy and selecting network |
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| CN201310116412.7A CN104105171B (en) | 2013-04-03 | 2013-04-03 | Network selection policies are issued and network selecting method and equipment |
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| CN106304223B (en) * | 2015-05-21 | 2020-09-29 | 西安中兴新软件有限责任公司 | Network mode switching method, device and system |
| CN105933953A (en) * | 2016-04-20 | 2016-09-07 | 广东工业大学 | Network control multi-input concurrent transmission method based on big data |
| CN109196918B (en) * | 2016-06-30 | 2020-12-15 | 华为技术有限公司 | Data transmission control method, communication equipment and core network equipment |
| WO2018170837A1 (en) * | 2017-03-23 | 2018-09-27 | Oppo广东移动通信有限公司 | Uplink data transmission method, terminal, network side device and system |
| CN108632910B (en) * | 2017-03-24 | 2019-07-02 | 电信科学技术研究院 | A kind of QoS processing method and equipment |
| CN108282844B (en) * | 2018-01-27 | 2020-11-17 | 惠州Tcl移动通信有限公司 | Network and method for controlling user terminal to select network system |
| CN112866311A (en) * | 2019-11-26 | 2021-05-28 | 中兴通讯股份有限公司 | Method, system, network equipment and storage medium for simultaneous transmission of FTP (File transfer protocol) uplink and downlink services |
| CN113038502B (en) * | 2019-12-24 | 2022-05-13 | 大唐移动通信设备有限公司 | Optimization method and device for VOLTE voice service |
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