WO2012059006A1

WO2012059006A1 - Method to select a wireless gateway and equipment for same

Info

Publication number: WO2012059006A1
Application number: PCT/CN2011/080917
Authority: WO
Inventors: 焦斌; 杨义
Original assignee: 大唐移动通信设备有限公司
Priority date: 2010-11-04
Filing date: 2011-10-18
Publication date: 2012-05-10
Also published as: CN102469560A; CN102469560B

Abstract

Disclosed is a method to select a wireless gateway and equipment for same. The method comprises: during the connection process of the access equipment, the access node instructs the evolved packet core (EPC) node whether or not to select the local wireless gateway for the access equipment, through initial user information. In the event that the access node instructs the EPC node to select the local wireless gateway for the access equipment, when the access node receives the initial request to establish a PDP context, based on the wireless gateway information that it carries, it is then determined whether the corresponding gateway is located at the vicinity of the access network, and processing is performed accordingly based on the determination result. This invention can achieve the use of the wired access node to select local wireless gateway for the access equipment.

Description

Method and device for selecting wireless access gateway for access device

This application claims the priority of the following Chinese patent application:

It was submitted to the Chinese Patent Office on November 4, 2010, and the application number is 201010536563.4. The invention titled "Chinese Patent Application for Selecting a Wireless Access Gateway for Access Devices and Its Equipment". Technical field

The present invention relates to the field of wireless communications, and in particular, to a method and device for selecting a wireless access gateway for an access device. Background technique

In future mobile communication systems, such as B3G (Beyond Third Generation) systems or LTE-A (Long Term Evolution-Advanced) systems, higher peak data rates and cell throughput will be provided, It also requires more bandwidth. At present, the unallocated bandwidth below 2 GHz is very small, and some or all of the bandwidth required by the B3G system can only be found in higher frequency bands, for example, above 3 GHz. The higher the frequency band, the faster the propagation of the radio wave is, and the shorter the transmission distance is. Therefore, in the same coverage area, more base stations are needed to ensure continuous coverage. Since the base station usually has a high cost, this will undoubtedly increase the cost of the network. In order to solve the problem of network cost and coverage, various vendors and standardization organizations began to study the introduction of relays into cellular systems to increase coverage.

Figure 1 shows the network architecture of the LTE-A system after the introduction of the relay node RN (Relay Node). The RN accesses the EPC (Evolved Packet Core, core network) through the donor cell under the eNB (base station). The core network does not have a direct wired interface, and each RN can control one or more cells. Under this architecture, UE (User Equipment, The interface between the user equipment and the RN is called the Uu interface, and the interface between the RN and the DeNB (Door Evolved Node B, the donor base station) is called the Un port.

The RN in this architecture has a dual identity. First, the RN has the identity of the UE, and the RN starts up similar to the UE's boot attach procedure. The RN has its own S-GW/P-GW (Serving Gateway/Public Data Network Gateway) and a Control Node MME (Mobility Management Entity). Next, for the UE accessing the RN, the RN has the identity of the eNB, and the downlink data of the UE needs to be sent from the S-GW/P-GW of the UE to the serving base station of the UE, that is, the RN, and then the RN sends the uplink on the Uu port. Give the UE.

As shown in FIG. 2, the RN startup process may be described as: establishing an RRC (Radio Resource Control) connection between the RN and the DeNB; the RN sends an attach request to the MME; and the MME is from the HSS (Home Subscriber Server). Obtain an authentication vector to authenticate the RN. If the authentication succeeds, the MME establishes a default 7-load for the RN in the S-GW/P-GW, and sends an initial context setup request message to the DeNB to establish an access layer of the RN in the DeNB. Context: The DeNB then sends an RRC Connection Reconfiguration message to the RN, carrying an attach accept message sent by the MME to the RN; and the RN returns to the RRC connection reconfiguration to confirm. In this way, the RN establishes a basic IP connection.

Then, OAM (Operation and Maintenance) downloads the node configuration information to the RN and configures the RN. After the RN establishes the necessary S1 interface and X2 interface, it can work as a base station.

In the prior art, when an eNB has communication requirements with the MME, it is necessary to establish an S1 interface between each other. The S1 interface establishment process is shown in Figure 3. The eNB sends an S1 Setup Request message (SI Setup Request) to the MME, where the message includes the eNB name, TAC (Tracking Area Code), and PLMN (Public Land Mobile). Network, public land mobile network) ID and other information. After receiving the SI setup request message, the MME saves the information of the eNB, and then puts information such as its own name, GUMMEK Globally Unique MME Identifier, global unique MME identifier, and capacity in the S1 Setup Response message (SI Setup Response). To the eNB. The latter saves this information after receiving it. Through this process, the application layer configuration data is exchanged between the eNB and the MME.

When an eNB needs to update the S1 interface application configuration, such as adding or subtracting or supporting a supported TA (Tracking Area), an eNB configuration update process is required, as shown in FIG. The eNB sends an eNB Configuration Update message (eNB Configuration Update) to the MME, including information such as increased or decreased TA. If the MME can accept this update, the B<J> updates the S1 interface configuration information of the eNB stored by itself and returns an eNB configuration update confirmation message to the eNB.

In the prior art, the P-GW selection and the S-GW selection for the normal UE are implemented based on the MME control, that is, the MME selects the P-GW for the UE according to the service type requested by the UE, and the MME is based on the current TA area of the UE. The S-GW is selected for the UE (there may be multiple S-GWs that can serve a certain TA zone UE). In the process of the RN as a UE accessing the network, Phase I and Phase II have completely different requirements for P-GW selection and S-GW selection. In Phase I, the selection of P-GW and the selection of S-GW can completely reuse the methods of P-GW selection and S-GW selection controlled by MME in the prior art; and in Phase II, the P selected for RN is required. - The GW and the S-GW are located locally on the radio access network, otherwise the RN will not work properly.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following drawbacks:

Since the P-GW and the S-GW selected by the MME are not required to be specific and unique P-GWs and S-GWs in the prior art (for example, the MME may be according to an operator's policy or There are no solutions such as load balancing and some features to dynamically select the appropriate P-GW and S-GW for the UE. In the scenario where the RN accesses the network in Phase II, there is no solution. Summary of the invention

An object of the present invention is to provide a method for selecting a radio access gateway for an access device and a device thereof, so as to control a local access gateway of the radio access network for controlling the access device by the line access network node, for which The invention adopts the following technical solutions:

A method for selecting a wireless access gateway for an access device, including:

During the access device access process, the access network node indicates, by using an initial user message, whether the core network node selects a wireless access gateway local to the access network for the access device; and indicates, in the access network node, the core network. When the node selects the radio access gateway local to the access network for the access device, when the access network node receives the initial context setup request sent by the core network node, according to the wireless connection carried therein Enter the gateway information, determine whether the corresponding gateway is located locally on the access network, and perform corresponding processing according to the judgment result.

An access network node device includes:

The indicating module is configured to: in the access device access process, indicate, by using an initial user message, whether the core network node selects a wireless access gateway local to the access network for the access device; and a determining module, configured to be used in the accessing When the network node instructs the core network node to select the wireless access gateway local to the access network for the access device, when the access network node receives the initial context establishment request sent by the core network node, according to the The wireless access gateway information carried therein determines whether the corresponding gateway is located locally on the access network;

The context establishing processing module is configured to perform corresponding processing according to the judgment result of the determining module.

A method for selecting a wireless access gateway for an access device, including: In the process of accessing the access device, the core network node, according to the indication information of the initial access message sent by the access network node, is used to indicate whether the access device selects the local wireless access gateway of the access network, The access device selects a radio access gateway; the core network node sends the information of the selected radio access gateway to the access network node by using an initial context setup request message.

A core network node device, including:

a selection module, configured to indicate, according to an initial access message sent by the access network node, an indication information indicating whether to select a local access wireless access gateway for the access device And selecting, by the access device, a wireless access gateway; the sending module, configured to send, by using an initial context setup request message, information about the wireless access gateway selected by the selecting module to the access network node.

In the foregoing embodiment of the present invention, the access network node indicates, by the access network node, whether the core network node selects a wireless access gateway local to the access network for the access device, and is an access device. When the context is established, it is further determined whether the core network selects the wireless access gateway for the access device according to the requirements, and performs a context establishment operation according to the judgment result, so that the line access network node controls the access device to select the wireless access network local wireless. Access gateway. DRAWINGS

1 is a schematic diagram of an E-UTRAN network architecture including an RN in the prior art; FIG. 2 is a schematic diagram of a RN startup process in the prior art;

3 is a schematic diagram of a S1 connection establishment process in the prior art;

4 is a schematic diagram of an eNB configuration update process in the prior art;

FIG. 5 is a schematic diagram of an overall process for selecting a radio access gateway for an RN according to an embodiment of the present disclosure;

FIG. 6 is a DeNB control process in a process of accessing a network by an RN according to an embodiment of the present invention. The flow chart of the MME selecting a wireless access gateway for the RN;

FIG. 7 is a schematic flowchart of a DeNB controlling an MME to select a radio access gateway for an RN in an RN accessing a network according to another embodiment of the present invention;

FIG. 8 is a schematic flowchart of a DeNB controlling an MME to select a radio access gateway for an RN in an RN accessing a network according to another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an access network node device according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of a core network node device according to an embodiment of the present invention. detailed description

For the above problems in the prior art, the embodiments of the present invention provide a P-GW and an S-GW that are controlled by the radio access network node itself (for example, DeNB) and confirmed to be located in the radio access network. mechanism. In the embodiment of the present invention, the MME determines, according to the indication information of the radio access network device (for example, the DeNB), whether the current access device (for example, the RN) selects the local S-GW of the radio access network or the local access of the radio access network. P-GW, and corresponding processing according to the judgment result.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

FIG. 5 is a schematic diagram of an overall process for selecting a wireless access gateway for an access device (such as an RN) according to an embodiment of the present disclosure, where the process may include:

Step 501: The radio access network node (for example, DeNB) reports the address information of the S-GW or the P-GW located in the radio access network to the core network node (for example, MME), and is used for establishing the core network node and the local S. - S11 interface between GWs, or S5 interface between S-GW and local P-GW.

Step 502: When the radio access network node (for example, the DeNB) needs to establish an initial context for the radio access device (for example, the RN), indicate that the current radio access device (for example, the RN) selects the local S-GW or the local P. - GW is a must.

Step 503: When a core network node (for example, an MME) initiates a wireless access device (for example) In the user context establishment process, such as RN, the radio access network node (e.g., DeNB) needs to determine whether step 502 has been met, and only after the condition met in step 502, the initial establishment of the radio access device (e.g., RN) can be confirmed. The context is successfully established, otherwise the above initial context establishment request is rejected, and the reason may be further indicated in the rejection message.

It should be noted that there is no strict sequence between the steps of the above process, and some steps in some embodiments may be omitted.

The following takes the network architecture of the radio access network node as the DeNB, the core network node as the MME, and the radio access device as the RN as an example, and further describes the embodiment of the present invention in conjunction with FIG. 6, FIG. 7, and FIG.

FIG. 6 is a schematic flowchart of a DeNB controlling an MME to select a radio access gateway for an RN in an RN accessing a network according to an embodiment of the present invention. In the process, the DeNB carries local S-GW address information or/and P-GW address information in the S1 interface setup or update message for the MME to select the S-GW or/and the P-GW for the RN, and the DeNB is in the initial user message. The medium MME indicates whether to select the S-GW or/and P-GW of the local access network for the RN. As shown, the process can include the following stages:

Phase 1: DeNB startup phase

After the DeNB is started, an S1 connection is established with the MME, and in the S1 connection establishment process, the address of the local S-GW or/and the P-GW of the radio access network (which may also be information such as an identifier that can uniquely identify the gateway) is sent to the MME. The MME stores the address of the S-GW or/and the P-GW and the corresponding DeNB identity and association relationship in its own context.

The format and content of the S1 setup request message sent by the DeNB may be as shown in Table 1 in the process of establishing an S1 connection between the DeNB and the MME. Table 1

In Table 1, the S-GW and the P-GW can adopt independent IE (Information Element) (such as Local (local) P-GW address (Address) and Local S-GW address in Table 1). Use the same IE, such as S-GW and P-GW integrated, with the same IP address.

Phase 2: The RN startup phase, which can include the following steps:

Step 601: After the RN is started, the RN establishes an RRC connection with the DeNB, and carries the indication information (for example, the RN identity indication) to the DeNB in the interaction process.

Step 602: The DeNB determines, according to the received indication information and its own type context, whether to force the RN to select the radio access network local S-GW or/and the radio access network local P-GWo.

Step 603: The DeNB respectively indicates, by using two information indication bits in the Initial User message (for example, Local P-GW selection indication) and Local S-GW selection indication, according to the determination result, respectively, whether the MME must Select the local S-GW of the access network for the RN and whether the access network must be selected for the RN Ground P-GW. The format and content of the Initial UE message can be as shown in Table 2a.

Table 2a

In this step, the DeNB may also instruct an MME to select a local access network P-GW and/or an S-GW for the RN by an information indicator bit (eg, Local GW selection indication) in the Initial UE message. The format and content of the Initial UE message can be as shown in Table 2b.

Table 2b

The Local GW selection indication cell can also be as shown in Table 2c.

Table 2c

Step 604: The MME determines, according to the indication information carried in the received Initial UE message, whether the S-GW local to the radio access network or the P-GW local to the radio access network must be selected for the RN. If the determination is yes, Step 605a is performed; otherwise, step 605b is performed, that is, the MME can perform S-GW or/and P-GW selection according to the prior art.

Step 605a, if the MME determines that the S-GW local to the radio access network needs to be selected for the RN, select the S-GW or/and the P-GW for the RN according to the determination result, and The S-GW in the access network initiates a session establishment process. Further, the MME sends the selected P-GW address to the S-GW, and the S-GW initiates a control plane connection to the target P-GW according to the address of the P-GW. The MME may obtain the S-GW address or/and the P-GW address bound to the current DeNB ID according to the context information saved in the DeNB startup phase, and select the S-GW or/and the P-GW for the RN.

It should be noted that, in the figure, the S-GW and the P-GW refer to the S-GW and the P-GW located in the core network. Although the figure is drawn in accordance with the S-GW function and the P-GW function integrated on the DeNB, the local S-GW function and the P-GW function of the radio access network may be integrated on the DeNB or It is a separate device located within the wireless access network.

Step 605b: If the MME determines that the S-GW of the radio access network is not required to be selected for the RN, the S-GW located in the core network may be selected for the RN according to the prior art, and the S-GW in the core network is selected. Initiate a session establishment process. Further, the MME sends the selected P-GW address to the S-GW, and the S-GW initiates a control plane connection to the target P-GW according to the address of the P-GW.

Step 606: The MME triggers the DeNB to establish a context for the RN by using an initial context setup request message, and carries the indication information of the P-GW or/and the S-GW selected by the RN in the message. The indication information may be P-GW or S. - GW's logo or address information). The format and content of the initial context setup request message may be as shown in Table 3.

table 3

The P-GW Selection Indication and the S-GW Selection Indication are indication information cells of the P-GW and the S-GW, respectively.

Step 607: The DeNB determines, according to the indication information of the P-GW or/and the S-GW selected by the RN that is carried in the received initial context setup request message, whether the The agreement indicated in 603 is the same.

For example, if the DeNB indicates in step 603 that the radio access network local P-GW needs to be selected for the RN, the DeNB checks whether the P-GW selected by the MME for the RN is located locally in the radio access network. If the DeNB indicates in step 603 that the radio access network local S-GW needs to be selected for the RN, the DeNB checks whether the S-GW selected by the MME for the RN is local to the radio access network. If the DeNB does not indicate in step 603 that the radio access network local P-GW needs to be selected for the RN, nor does it indicate that the radio access network local S-GW needs to be selected for the RN, the DeNB skips the current check procedure and considers the check result to be true.

Step 608a, if the determination in step 607 is "true", the DeNB establishes an initial context for the RN and sends an initial context response message to the MME.

Step 608d, if the judgment in step 607 is that the DeNB rejects the initial context establishment request of ΜΜΕ, and carries the failure cause in the initial context establishment failure message sent to the MME.

In the foregoing process, when the address of the local S-GW or the P-GW of the radio access network changes, the DeNB initiates an S1 connection update process, and the MME updates the address of the S-GW or/and the P-GW stored in the context and Corresponding DeNB identification information and its associated relationship. The format and content of the configuration update message initiated by the DeNB may be as shown in Table 4.

Table 4

The Local P-GW address and the Local S-GW address cell are respectively used for the 7-bit P-GW address and the S-GW address.

Referring to FIG. 7, a flow chart of a DeNB controlling an MME to select a radio access gateway for an RN in an RN accessing a network according to another embodiment of the present invention is provided. The flow differs from the flow shown in FIG. 6 in that the DeNB sends the S-GW address information and/or P-GW address information local to the radio access network to the MME through the initial user message, so that the MME selects the S-GW for the RN. Or, and/or P-GW; In addition, when the DeNB indicates, by using an initial user message, whether the MME selects an S-GW or/and a P-GW local to the access network for the RN, the indication information carried in the message may be only S- Address information of GW or / and P-GW. As shown, the process can include:

Step 701: After the RN is powered on, establish an RRC connection with the base station, and carry indication information (for example, an RN identity indication) to the DeNB in the interaction process.

Step 702: The DeNB determines, according to the received indication information and its own type context, whether it is necessary to forcibly select a radio access network local S-GW or a radio access network for the RN. Ground P-GW.

Step 703: The DeNB respectively indicates, by using two information indicating bits in the Initial User message (for example, Local P-GW selection indication and Local S-GW selection indication), according to the judgment result, whether the MME has to select the RN for the RN. Networked local S-GW and P-GW. When the access network local S-GW or / and P-GW needs to be selected for the RN, the DeNB sends the S-GW or / and P-GW address information of the radio access network to the MME. The format and content of the Initial UE message may be as follows:

table 5

The Local P-GW selection indication and the Local S-GW selection indication information are respectively used to indicate whether the access network local S-GW and the P-GW are required for the RN, the Local P-GW address and the Local S-GW address letter. The elements are respectively used to carry the S-GW address and the P-GW address.

In this step, the DeNB determines that it is necessary to force the RN to select the radio access network locally. In the case of the P-GW and/or the S-GW, only the P-GW and/or S-GW address information local to the radio access network may be sent to the MME without transmitting GW selection indication information (such as Local P- to the MME). GW selection indication and Local S-GW selection indication ).

Step 704: The MME determines, according to the indication information carried in the received Initial UE message, whether the S-GW local to the radio access network or the P-GW local to the radio access network must be selected for the RN. If the determination is yes, the step is performed. 705a; Otherwise, step 705b is performed, ie, the MME can perform S-GW and P-GW selection according to the prior art.

In this step, if the MME only receives the P-GW and/or S-GW address information local to the radio access network, it may be considered that the P-GW and/or the S-GW of the local access network need to be selected for the RN.

Step 705a, if the MME determines that the S-GW local to the radio access network needs to be selected for the RN, select the S-GW or/and the P-GW for the RN according to the judgment result, and send the S-GW to the radio access network. (Here, the DeNB and the access network local S-GW are located on the same physical entity) initiate a session establishment process. Further, the MME sends the selected P-GW address to the S-GW, and the S-GW initiates a control plane connection to the target P-GW according to the address of the P-GW. The MME may select the S-GW or / and the P-GW for the RN according to the S-GW or / and P-GW address obtained in step 703.

Step 705b: If the MME determines that the S-GW of the radio access network is not required to be selected for the RN, the RN may select an S-GW located in the core network and initiate the S-GW in the core network according to the prior art. Session establishment process. Further, the MME sends the selected P-GW address to the S-GW, and the S-GW initiates a control plane connection to the target P-GW according to the address of the P-GW.

Step 706: The MME triggers the DeNB to establish a context for the RN by using an initial context setup request message, and carries the indication information of the P-GW or/and the S-GW selected by the RN in the message. The indication information may be P-GW or S. -GW's logo or address letter Interest). The format and content of the initial context setup request message may be as shown in Table 6.

Table 6

The P-GW Selection Indication and the S-GW Selection Indication cell are respectively used to indicate the P-GW or the S-GW selected for the RN.

Step 707: The DeNB carries the request according to the received initial context setup request message. The indication information of the P-GW or/and the S-GW selected by the RN determines whether it is consistent with the indication in step 703.

For example, if the DeNB indicates in step 703 that the radio access network local P-GW needs to be selected for the RN, the DeNB checks whether the P-GW selected by the MME for the RN is located locally in the radio access network. If the DeNB indicates in step 703 that the radio access network local S-GW needs to be selected for the RN, the DeNB checks whether the S-GW selected by the MME for the RN is local to the radio access network. If the DeNB does not indicate in step 703 that the radio access network local P-GW needs to be selected for the RN, nor does it indicate that the radio access network local S-GW needs to be selected for the RN, the DeNB skips the current check procedure and considers that the check result is true.

Step 708a, if the determination in step 707 is "true", the DeNB establishes an initial context for the RN and sends an initial context response message to the MME.

Step 708b, if the judgment in step 707 is that the DeNB rejects the initial context establishment request of ΜΜΕ, and carries the failure cause in the initial context establishment failure message sent to the MME.

FIG. 8 is a schematic flowchart of a DeNB controlling an MME to select a radio access gateway for an RN in an RN accessing a network according to another embodiment of the present invention. The procedure is different from the flow shown in FIG. 7 in that the MME obtains the radio access network S-GW or/and P-GW address associated with the DeNB through a DNS (Domain Name System) query. As shown, the process can include:

Step 801: After the RN is powered on, establish an RRC connection with the DeNB, and carry indication information (for example, an RN identity indication) to the DeNB in the interaction process.

Step 802: The DeNB determines, according to the received indication information and its own type context, whether it is necessary to force the RN to select the radio access network local S-GW or/and the radio access network local P-GWo.

Step 803: The DeNB passes the initial user message according to the judgment result. Two information indication bits in message ) (eg, Local P-GW selection indication and Local S-GW selection indication ), respectively indicating whether the MME must select an access network local S-GW for the RN or/and whether it must be selected for the RN Network access local P-GWo

The format and content of the Initial UE message can be as shown in Table 7.

Table 7

Step 804: The MME determines, according to the indication information carried in the received Initial UE message, whether the S-GW local to the radio access network or the local P-GW of the radio access network must be selected for the RN. If the determination is yes, Step 805a is performed; otherwise, step 805b is performed, that is, the MME can perform S-GW and P-GW selection according to the prior art.

Step 805a: If the MME determines that the S-GW local to the radio access network needs to be selected for the RN, obtain the S-GW or/and P-GW address local to the access network through the DNS query manner according to the judgment result, and obtain the wireless The S-GW in the access network (where the DeNB and the local S-GW of the access network are located on the same physical entity) initiate a session establishment process. Further, the MME sends the selected P-GW address to the S-GW, and the S-GW according to the P-GW The address initiates a control plane connection to the target P-GW. If the MME determines that the S-GW or/and the P-GW local to the radio access network needs to be selected for the RN, the MME sends the DeNB ID as an index to the DNS, and the DNS system performs an inquiry according to the DeNB ID and the type of the query gateway. And sending the queried gateway address information to the MME.

Step 805b: If the MME determines that it is not necessary to select the S-GW local to the radio access network for the RN, select an S-GW located in the core network for the RN according to the prior art and initiate a session to the S-GW in the core network. The establishment process. Further, the MME sends the selected P-GW address to the S-GW, and the S-GW sends a control plane connection to the target P-GW according to the address of the P-GW.

Step 806: The MME triggers the DeNB to establish a context for the RN by using an initial context setup request message, and carries the indication information of the P-GW or/and the S-GW selected by the RN in the message item (the indication information may be a P-GW or S-GW identification or address information). The initial context setup request message may be as shown in Table 8.

Table 8

The P-GW Selection Indication and the S-GW Selection Indication cell are respectively used for the 7-bit P-GW identifier and the S-GW identifier.

Step 807: The DeNB determines, according to the indication information of the P-GW or/and the S-GW selected by the RN that is carried in the received initial context setup request message, whether the Consistent as indicated in 803.

For example, if the DeNB indicates in step 803 that the radio access network local P-GW needs to be selected for the RN, the DeNB checks whether the P-GW selected by the MME for the RN is located locally in the radio access network. If the DeNB indicates in step 803 that the radio access network local S-GW needs to be selected for the RN, the DeNB checks whether the S-GW selected by the MME for the RN is local to the radio access network. If the DeNB does not indicate in step 803 that the radio access network local P-GW needs to be selected for the RN, nor does it indicate that the radio access network local S-GW needs to be selected for the RN, the DeNB skips the current check procedure and considers the check result to be true.

Step 808a, if the determination in step 807 is "true", the DeNB establishes an initial context for the RN and sends an initial context response message to the MME.

In step 808b, if the determination in step 807 is that the DeNB rejects the initial context setup request of the MME, and requests the initial context setup failure message sent to the MME, the failure cause is carried.

Based on the same technical concept, the embodiment of the present invention also provides a network device that can be used in the above process.

FIG. 9 is a schematic structural diagram of an access network node device according to an embodiment of the present invention, where the network device can be a station device. As shown in the figure, the access network node device may include: an indication module 901, configured to indicate, in an access device access process, whether the core network node selects an access network local for the access device by using an initial user message. Wireless access gateway;

The determining module 902 is configured to: when the access network node instructs the core network node to select a radio access gateway local to the access network for the access device, when the access network node receives the core When the initial context establishment request sent by the network node is used, it is determined whether the corresponding gateway is located locally on the access network according to the wireless access gateway information carried therein;

The context establishment processing module 903 is configured to enter according to the judgment result of the determination module 902. The line is processed accordingly.

In the foregoing access network node device, the indication module 901 can carry the indication information for indicating whether the access device selects the wireless access gateway local to the access network to carry the initial user message.

In the foregoing access network node device, the indication module 901 may indicate an indication identifier for indicating whether the access device selects an access network local service gateway, or/and, and is used to indicate whether to select an access network local packet for the access device. The indication identifier of the data gateway is carried in the initial user message; or the access network local service gateway address or identifier selected for the access device, or/and the address of the access network local packet data gateway selected for the access device or The identity is carried in the initial user message.

In the foregoing access network node device, the context establishment processing module 903 may be specifically configured to: establish an initial context for the access device when determining that the gateway corresponding to the received wireless access gateway information is local to the access network; or When it is determined that the gateway corresponding to the received wireless access gateway information is not located locally on the access network, the initial context is denied to be established for the access device.

In the foregoing access network node device, the context establishment processing module 903 is further configured to: if the initial context is refused to be established for the access device, return an initial context establishment failure response to the core network node, where the failure cause is carried.

In the foregoing access network node device, the indication module 901 may further send the wireless access gateway information of the access network to the core network node by using an initial user message, so that the core network node selects the wireless access gateway for the access device.

The access network node device may further include: an access processing module 904, configured to send, by the access network node, the wireless access gateway information of the access network to the core network node during the access process, The core network node selects a wireless access gateway for the access device.

10 is a schematic structural diagram of a core network node device according to an embodiment of the present invention. The core network node device may be an MME. As shown, the core network node device can include:

The selecting module 1001 is configured to: according to the indication that the initial access message sent by the access network node is used to indicate whether to select the wireless access gateway local to the access network for the access device in the access device access process Information, selecting a wireless access gateway for the access device;

The sending module 1002 is configured to send, by using an initial context setup request message, information about the radio access gateway selected by the selection module 1001 to the access network node.

The core network node device may further include one of the following acquisition modules: The first acquisition module 1003 is configured to obtain, from the access network node, the local wireless network of the access network during the access process of the access network node. Accessing the gateway information, and storing the wireless access gateway information and the access network node identifier and its association relationship in its own context; correspondingly, the selecting module 1001 may save according to the context of the core network node device itself. The information of the wireless access gateway is selected according to the access network node identifier and its associated relationship.

The second obtaining module 1004 is configured to obtain the wireless access gateway information of the access network from the initial user message sent by the access network node. Correspondingly, the selecting module 1001 may obtain the second access module according to the second acquiring module. The wireless access gateway information local to the access network is selected.

The third obtaining module 1005 is configured to: when determining, according to the indication information, that the radio access gateway that is local to the radio access network needs to be selected for the access device, query the domain name resolution system according to the identifier of the access network node to obtain the Correspondingly, the selection module 1001 may select, according to the information about the wireless access gateway local to the access network acquired by the third acquiring module.

The core network node device may further include: a receiving module 1006, configured to receive the An initial context establishment failure response returned by the access network node, where the failure cause information is carried, wherein the access network node determines that the core network node is instructed to select a local wireless connection of the access network for the access device In the case of the gateway, when the radio access gateway selected by the core network node is not the radio access gateway local to the access network, the initial context establishment failure response is returned.

In summary, the embodiment of the present invention reduces the processing complexity of the MME on the P-GW and S-GW selection issues in different scenarios. The MME does not need to distinguish the specific scenario, but only needs to determine the necessity of selecting the local P-GW and the S-GW of the radio access network according to the indication information of the radio access network. Therefore, the embodiment of the present invention solves similar problems in the following embodiments. Good versatility.

Those skilled in the art can understand that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A terminal device (which may be a cell phone, a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. The scope of protection of the invention should be considered.

Claims

Rights request

A method for selecting a wireless access gateway for an access device, the method comprising:

During the access device access process, the access network node indicates, by using an initial user message, whether the core network node selects a wireless access gateway local to the access network for the access device;

And when the access network node instructs the core network node to select a radio access gateway local to the access network for the access device, when the access network node receives the initial context sent by the core network node When the request is established, according to the wireless access gateway information carried therein, it is determined whether the corresponding gateway is located locally on the access network, and corresponding processing is performed according to the judgment result.

The method according to claim 1, wherein the initial user message carries indication information indicating whether the access device selects a wireless access gateway local to the access network.

The method according to claim 2, wherein the indication information comprises: an indication identifier for indicating whether to select an access network local service gateway for the access device, or/and, for indicating whether the connection is The ingress device selects an indication identifier of the local packet data gateway of the access network;

Alternatively, the indication information includes an access network local service gateway address or identifier selected for the access device, or / and an access network local packet data gateway address or identifier selected for the access device.

4. The method according to claim 1, wherein the method is performed according to the judgment result Corresponding treatment, including:

When it is determined that the gateway corresponding to the received wireless access gateway information is located at the local access network, establishing an initial context for the access device;

When it is determined that the gateway corresponding to the received wireless access gateway information is not located locally on the access network, the initial context is denied to be established for the access device.

5. The method according to claim 4, wherein the method further comprises: if the access network node refuses to establish an initial context for the access device, returning an initial context setup failure to the core network node Response, which carries the reason for the failure.

The method according to claim 1, wherein the method further comprises: the access network node transmitting information of a local wireless access gateway of the access network to the core network node during the access process, For the core network node to select a wireless access gateway for the access device;

Alternatively, the access network node sends the wireless access gateway information of the access network to the core network node by using an initial user message, so that the core network node selects the wireless access gateway for the access device.

The method according to any one of claims 1 to 6, wherein the access device is a relay node, the access network node is a base station, and the core network node is a mobility management entity. The wireless access gateway includes a serving gateway or/and a packet data gateway.

8. An access network node device, comprising:

The indicating module is configured to: in the access device access process, indicate, by using an initial user message, whether the core network node selects a wireless access gateway local to the access network for the access device; and a determining module, configured to be used in the accessing The network node instructs the core network node to be the access device In the case of selecting a radio access gateway local to the access network, when the access network node receives the initial context setup request sent by the core network node, determining, according to the radio access gateway information carried therein, Whether the gateway is located locally on the access network;

The access network node device according to claim 8, wherein the indication module is specifically configured to: carry the indication information for indicating whether the access device selects a wireless access gateway local to the access network In the initial user message.

The access network node device according to claim 9, wherein the indication module is specifically configured to: indicate an indication identifier for selecting an access network local service gateway for the access device, or/and The indication identifier for indicating whether the access network local packet data gateway is selected for the access device is carried in the initial user message; or the access network local service gateway address or identifier selected for the access device, or / and The address or identity of the access network local packet data gateway selected by the access device is carried in the initial user message.

The access network node device according to claim 8, wherein the context establishment processing module is specifically configured to: when determining that the gateway corresponding to the received wireless access gateway information is located in the access network, Establishing an initial context for the access device; or determining to establish an initial context for the access device when determining that the gateway corresponding to the received wireless access gateway information is not located locally on the access network.

The access network node device according to claim 11, wherein the context establishment processing module is further configured to: if the initial context is refused to be established for the access device, return an initial to the core network node Context establishment failure response, where the loss is carried The reason for the defeat.

The access network node device according to claim 8, wherein the indication module is further configured to: send, by using an initial user message, information about a wireless access gateway local to the access network to a core network node, where The core network node selects a wireless access gateway for the access device.

The access network node device according to claim 8, wherein the device further comprises:

An access processing module, configured to send, by the access network node, wireless access gateway information local to the access network to the core network node, where the core network node selects wireless access for the access device Gateway.

The access network node device according to any one of claims 8 to 14, wherein the access network node device is a base station device.

16. A method for selecting a wireless access gateway for an access device, the method comprising:

In the process of accessing the access device, the core network node, according to the indication information of the initial access message sent by the access network node, is used to indicate whether the access device selects the local wireless access gateway of the access network, The access device selects a radio access gateway; the core network node sends the information of the selected radio access gateway to the access network node by using an initial context setup request message.

The method according to claim 16, wherein the method further comprises: the core network node obtaining an access network local from the access network node during the access network node access process Wirelessly accessing gateway information, and storing the wireless access gateway information and the access network node identifier and its associated relationship in its own context; When the core network node selects the wireless access gateway for the access device, the core network node selects according to the information of the wireless access gateway saved in its own context and the access network node identifier and its associated relationship.

The method of claim 16, wherein the method further comprises: obtaining, by the core network node, information about the wireless access gateway local to the access network from the initial user message sent by the access network node;

When the core network node selects a wireless access gateway for the access device, the core network node selects according to the obtained wireless access gateway information of the access network.

The method according to claim 16, wherein the method further comprises: determining, by the core network node, that a radio access gateway local to the radio access network needs to be selected for the access device according to the indication information Querying the domain name resolution system according to the identifier of the access network node to obtain information about the wireless access gateway local to the access network where the access network node is located;

When the core network node selects a wireless access gateway for the access device, the core network node selects according to the queried wireless access gateway information of the access network.

The method according to any one of claims 16 to 19, wherein the method further comprises:

Receiving, by the core network node, an initial context setup failure response returned by the access network node, where the failure cause information is carried, where the access network node determines that the core network node is the access device When the wireless access gateway local to the access network is selected, when the wireless access gateway selected by the core network node is not the wireless access gateway local to the access network, the initial context establishment failure response is returned.

The method according to any one of claims 16 to 19, wherein the access device is a relay node, the access network node is a base station, and the core network node is a mobility management entity. The wireless access gateway includes a serving gateway or/and a packet data gateway.

22. A core network node device, comprising:

The core network node device of claim 22, wherein the device further comprises:

a first acquiring module, configured to obtain, from the access network node, wireless access gateway information local to the access network, and the wireless access gateway information and the The access network node identifier and its association relationship are saved in its own context;

The selecting module is specifically configured to select, according to the information about the wireless access gateway saved in the context of the core network node device, the identifier of the access network node and its associated relationship.

The core network node device of claim 22, wherein the device further comprises:

a second acquiring module, configured to obtain, according to an initial user message sent by the access network node, information about the wireless access gateway local to the access network;

The selecting module is specifically configured to: according to the connection acquired by the second acquiring module Enter the local wireless access gateway information to select.

The core network node device of claim 22, wherein the device further comprises:

a third obtaining module, configured to determine, according to the indication information, that a radio access gateway that is local to the radio access network is selected for the access device, query the domain name resolution system according to the identifier of the access network node to obtain the connection Information about the wireless access gateway local to the access network where the access node is located;

The selecting module is specifically configured to perform selection according to the wireless access gateway information local to the access network acquired by the third acquiring module.

The core network node device according to any one of claims 22 to 25, wherein the device further comprises:

a receiving module, configured to receive an initial context setup failure response returned by the access network node, where the failure cause information is carried, where the access network node determines that the core network node is the access device When the wireless access gateway local to the access network is selected, when the wireless access gateway selected by the core network node is not the wireless access gateway local to the access network, the initial context establishment failure response is returned.

The core network node device according to any one of claims 22 to 25, wherein the core network node is a mobility management entity.