WO2010121495A1 - Method and system for assigning internet protocol address - Google Patents

Abstract

The present application discloses a method and system for assigning an internet protocol (IP) address, which are used to determine the type of the IP address which is assigned to a user equipment (UE) by a local network, and assign an IP address of the type to the UE, in the local network without packet data network gateways (PDNGWs) and gateway general packet radio service support nodes (GGSNs) in the core networks, through a user mobility control and management entity. A method for assigning an IP address provided by the present application comprises: according to information of a local network to which a UE requests an access, a user mobility control and management entity instructs a home base station to connect the UE to the local network by establishing a radio bearer of the local network for the UE; the user mobility control and management entity determines the type of the IP address which is assigned to the UE by the local network, and instructs the UE to acquire an IP address of the type from the home base station; and the home base station assigns an IP address to the UE, according to a message requesting for IP address assignment, which is sent by the UE.

Description

 The present invention claims the priority of the Chinese patent application filed on April 23, 2009, the Chinese Patent Office, the application number is 200910082642.X, and the invention name is "an IP address allocation method and system". The entire contents of which are incorporated herein by reference. Technical field

 The present invention relates to the field of communications technologies, and in particular, to an Internet Protocol (IP) address allocation method and system. Background technique

 In the Evolved Packet System (EPS), version 4 of the Internet Protocol (IPv4) and version 6 of the Internet Protocol (IPv6) are supported.

 A scheme for a user equipment (UE) to obtain an IP address in the prior art includes:

 The UE initiates establishment of a PDN connection of the SGi interface or the Gi interface;

 The UE sends the type information of the IP address that is requested to be allocated to the network side, that is, the UE requests the network side to allocate an IPv4 address and/or an IPv6 address.

 After receiving the type information of the IP address that the UE requests to be allocated, the network-side user mobility control management entity may further modify the type information of the IP address that the UE requests to allocate according to the subscription data of the UE and the configuration of the network.

 a packet data network gateway (PDN GW, Packet Data Network Gateway) in the core network, or a GPRS (General Packet Radio Service) support node (GGSN), allocated according to the modified UE request The type information of the IP address, and the UE is assigned a corresponding type of IP address according to its own capabilities.

 The types of IP addresses that the UE requests to be allocated are classified into three types: IPv4, IPv6, version 4, and version 6 Internet Protocol (IPv4v6).

When the type of the IP address requested by the UE is IPv4v6, due to the PDN GW or GGSN IPv4v6 may not be supported, and only IPv4 or IPv6 addresses may be assigned to the UE, and the UE may be requested to apply for another version of the IP address again.

 When the IP address assigned to the UE is an IPv4v6 type IP address, the bearer is associated with both an IPv4 address and an IPv6 address.

 When the IP address assigned to the UE is an IPv4 address, the bearer can only be associated with one IPv4 address.

 When the type information of the IP address assigned to the UE is an IPv6 address, the bearer can be associated with only one IPv6 address.

 If the UE has the capability of IPv4 and IPv6, the type information of the IP address to be requested is set to IPv4v6;

 If the UE has only IPv4 capability, the type information of the IP address to be assigned is set to IPv4; if the UE has only IPv6 capability, the type information of the IP address to be requested is set to IPv6. However, in the prior art, the bearer established by the UE is to use the SGi or Gi interface, because the type of the IP address allocated to the UE can be determined only by the PDN GW or the GGSN, and the UE is assigned the IP address of the type.

 The current 3GPP specification puts new demands on the version 9 (R9) home base station (Home eNodeB or Home NodeB) in the TS22.220 standard, indicating that IP-capable UEs should be able to support IP capabilities through home base stations and homes. The devices are connected to each other, and in the home network, the PDN GW or GGSN in the core network is not used, so the UE cannot be assigned an IP address. Summary of the invention

 An embodiment of the present invention provides an IP address allocation method and system for determining, by a user mobility control management entity, a type of an IP address allocated by a local network for a UE in a local network without a PDN GW and a GGSN in a core network. And assign the UE an IP address of this type.

 An IP address allocation method provided by an embodiment of the present invention includes:

The information of the local network that the user mobility control management entity requests to access according to the user equipment UE, The home base station accesses the local network by establishing a radio bearer of the local network for the UE; the user mobility control management entity determines the type of the IP address allocated by the local network for the UE, and instructs the UE to obtain the information from the home base station. IP address of this type;

 The home base station allocates an IP address according to the request sent by the UE, and allocates an IP address to the UE. An apparatus for controlling an Internet Protocol IP address allocation according to an embodiment of the present invention includes: an access local network indication unit, configured to indicate, according to information of a local network that the user equipment UE requests to access, to indicate that the home base station establishes a local network for the UE Radio bearer, accessing the UE to the local network;

 An IP address type determining unit, configured to determine a type of an IP address allocated by the local network to the UE, and an IP address obtaining indication unit, configured to instruct the UE to acquire, from the home base station, an IP address of the type determined by the IP address type determining unit for the UE .

 A home base station provided by an embodiment of the present invention includes:

 a bearer establishing unit, configured to establish, according to an indication sent by the user mobility control management entity, a bearer of the local network for the user equipment UE, to establish a radio bearer of the local network for the UE;

 And a receiving requesting unit, configured to receive a message that is sent by the UE to request an Internet Protocol 地址>address; and an IP address allocating unit, configured to allocate an IP address according to the request sent by the UE, and allocate an IP address to the UE.

 A communication system provided by an embodiment of the present invention includes:

 The user mobility control management entity is configured to: according to the information of the local network that the user equipment UE requests to access, instruct the home base station to establish the radio bearer of the local network for the UE, and access the local network to the local network; The type of the Internet Protocol IP address, and instructing the UE to acquire the IP address of the type from the home base station;

 The home base station is configured to establish, according to the user mobility control management entity, an indication of establishing a bearer of the local network for the UE, establish a wireless bearer of the local network for the UE, and allocate an IP address message according to the request sent by the UE, where The UE allocates an IP address.

 A user equipment provided by an embodiment of the present invention includes:

Requesting access to a local network unit, a letter for a local network requesting access by the user equipment The information is sent to the home base station, and accesses the local network by using the radio bearer of the local network established by the home base station for the user equipment;

 An IP address type obtaining unit, configured to receive an indication of a user mobility control management entity, and obtain, from the medium network type, an IP address type assigned by the local network determined by the user mobility control management entity to the user equipment;

 The IP address obtaining unit is configured to acquire the IP address of the type from the home base station.

 An Internet Protocol IP address allocation method provided by an embodiment of the present invention includes:

 The user mobility control management entity instructs the home base station to access the local network by establishing a wireless bearer of the local network for the UE according to the information of the local network that the user equipment UE requests to access; the user mobility control management entity determines the local The type of the IP address assigned by the network to the UE, and instructing the UE to obtain the IP address of the type from the home base station, and instructing the home base station to allocate an IP address according to the request sent by the UE, and assigning an IP address to the UE.

 According to the embodiment of the present invention, the user mobility control management entity, according to the information of the local network that the user equipment UE requests to access, instructs the home base station to establish the radio bearer of the local network for the UE, and access the local network to the local network; The entity determines the type of the IP address assigned by the local network to the UE, and instructs the UE to obtain the IP address of the type from the home base station; the home base station allocates an IP address according to the request sent by the UE, and allocates an IP address to the UE, thereby In the case where there is no PDN GW or GGSN in the core network in the local network, the IP address can be allocated to the UE through the home base station. DRAWINGS

 FIG. 1 is a schematic diagram of a UE accessing a mobile operator network and a local network through a home base station according to an embodiment of the present disclosure;

 2 is a schematic flowchart of an IP address allocation method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a UE Requested PDN Connectivity process according to an embodiment of the present invention;

4 is a schematic diagram of an Attach process according to an embodiment of the present invention; FIG. 5 is a schematic diagram of an Activate PDP Context process according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a communication system according to an embodiment of the present invention. detailed description

 An embodiment of the present invention provides an IP address allocation method and system for determining, by a user mobility control management entity, a type of an IP address allocated by a local network for a UE in a local network that does not use a PDN GW or a GGSN, and is a UE. Assign this type of IP address.

 The user mobility control management entity described in the embodiment of the present invention is an MME or an SGSN.

 In the prior art, the IP-capable UE can access the mobile operator network (Mobile Operators Core network) through the home base station. In the embodiment of the present invention, the IP-capable UE can also support the IP capability through the home base station and the home. The devices are connected to each other, that is, to the local network. However, since the local network does not have a PDN GW or a GGSN in the core network, if the UE accesses the local network through the home base station, the UE cannot obtain an IP address through the PDN GW or the GGSN in the core network, so the embodiment of the present invention proposes In this case, the user mobility control management entity instructs the UE to obtain the corresponding type of IP address from the home base station by using the Internet Engineering Task Force (IETF), that is, through the dynamic host configuration protocol (DHCPv4) of the version 4, And/or assign an IP address to the UE through the IPv6 stateless address self-configuration mode.

 Preferably, the solution for assigning an IP address to the UE by using the user mobility control management entity is applicable to the case where the UE accesses the local network through the home base station, but the PDN GW in the core network is not used. Or the case where the GGSN assigns an IP address, the same applies.

 The local network in the embodiment of the present invention refers to a home network or a local Internet (Internet) connected to a home base station.

 The so-called home network refers to the home network device connected to the home base station, for example: one or more home computers, network printers, network video devices, network cameras, etc., the local local area network formed by these home network devices is the family The internet.

The so-called local Internet network refers to the network that can be connected to the Internet connected to the home station. 00559 network.

 As shown in FIG. 1 , the UE in the embodiment of the present invention can connect not only to the mobile operator network through the home base station, but also to the home network or the local Internet network through the home base station, and when the UE is connected to the home network or the local Internet. In the network, the IP address can also be obtained through the MME or the SGSN.

 The home base station in the embodiment of the present invention includes a common home base station (HNB, Home NodeB) or an evolved home base station (HeNB, Home eNodeB), wherein the HeNB is connected to the MME, and the HNB is connected to the SGSN.

 Referring to FIG. 2, an IP address allocation method provided by an embodiment of the present invention generally includes the following steps:

The user mobility control management entity instructs the home base station to connect the UE to the local network by establishing a radio bearer of the local network for the UE according to the information of the local network that the UE requests to access.

 5102. The user mobility control management entity determines a type of an IP address allocated by the local network to the UE, and instructs the UE to obtain the IP address of the type from the home base station by using an IP address allocation manner defined by the IETF.

 5103. The home base station allocates an IP address message according to the request sent by the UE, and allocates an IP address to the UE.

 Preferably, the step of the user mobility control management entity determining the type of the IP address assigned by the local network to the UE comprises:

 The user mobility control management entity determines the type of the IP address allocated by the local network for the UE according to the configuration information of the UE and the type of the IP address that the UE requests to allocate and the subscription data of the UE, and may select the IP included in the three parameters. The address type, which is the type of IP address assigned to the UE by the local network. Therefore, it is possible for the user mobility control management entity to change the type of IP address that the UE requests to allocate.

 For example, when the UE obtains an IP address through the UE Requested PDN Connectivity process or the attach procedure, using the MME:

The IP address type requested by the UE through the PDN Connectivity Request message or the Attach Request message is IPv4v6, the IP address of the UE's subscription data. The address type is IPv4v6. In the configuration of the MME, only the single IP address is allowed for the IP address type.

EPS bearer context request ) In the message or PDN Connectivity Accept message or the Attach Accept message, the PDN Type is IPv4 (of course, it can also be IPv6), and a cause value is set in the message. The reason value indicates "single address bearers only", that is, the bearer can only be associated with one IP address of the UE. Then, the UE may initiate a PDN Connectivity Request (PDN Connectivity Request) message to obtain another type of IP address, that is, an IPv6 address. At this time, the MME may set an Activate default EPS bearer context request message or a PDN in the PDN Connectivity Accept message. Type is IPv6.

 The IP address type requested by the UE through the PDN Connectivity Request message or the Attach Request message is IPv4v6, and the IP address type in the subscription data of the UE is Π>ν4ν6, and the configuration of the UI allows the use of the IPv4v6 address. The MME sets the Activate default EPS bearer context request message or the PDN Connectivity Accept message or the Attach Accept Accept message in the PDN Type to be IPv4v6.

 For another example, when the UE obtains an IP address by using the SGSN by using an activated packet data protocol context procedure:

 The IP address type requested by the UE by activating the Activate PDP Context Request message is IPv4v6, the IP address type in the subscription data of the UE is IPv4v6, and the configuration of the SGSN only allows the PDP Context to use a single IP address, then the SGSN is set. In the Activate PDP Context Accept message, the PDP Address Type is IPv4 (of course, it can be set to IPv6 first), and a cause value is set. The reason that the PDP Address Type is IPv4 is single address bearers only. Thereafter, the UE The Activate PDP Context Request message can be sent again. The IP address type requested by the UE is IPv6. In this case, the SGSN sets the PDP Address Type in the Activate PDP Context Request message to IPv6.

If the IP address type requested by the UE by activating the Activate PDP Context Request message is IPv4v6, the IP address type in the subscription data of the UE It is IPv4v6. The configuration of the SGSN allows the PDP Context to use the IPv4v6 address. The SGSN sets the PDP Address Type in the Activate PDP Context Request message to IPv4v6.

 Preferably, when the user mobility control management entity is the MME, the step of the MME indicating that the UE obtains the IP address from the home base station by using the IP address allocation manner defined by the IETF includes:

 The MME indicates, by using the Activate default EPS bearer context request message, or the PDN Connectivity Accept message or the Attach Accept message, that the UE obtains an IP address from the home base station by using an IP address allocation manner defined by the IETF.

 Preferably, the MME indicates, by means of an Activate default EPS bearer context request message or a PDN Connectivity Accept message or an Attach Accept message, a packet data network type (PDN Type) and a packet data network address (PDN Address), indicating that the UE is defined by the IETF. The IP address allocation method obtains an IP address from the home base station;

 When the MME determines that the IP address assigned by the local network to the UE is the version 4 Internet Protocol (IPv4) address, the MME sets the PDN Type to IPv4 only (IPv4 Only), and sets the PDN Address to zero (ie 0.0.0.0); The MME sets the PDN Type to IPv6 only (IPv6 Only), and assigns the IPv6 interface identifier (Interface Identity) to the UE, sets the IPv6 Interface Identit in the PDN Address, and also needs to include the address prefix (IPv6 Prefix) in the IPv6 address. ) set to all zeros;

 When the MME determines that the DP address assigned by the local network to the UE is the Internet Protocol (IPv4v6) address of version 4 and version 6, the MME sets the PDN Type to IPv4v6, and sets the IPv4 address in the PDN Address to be zero (ie, 0.0.0.0). The IPv6 Interface Identity is assigned to the UE, and the IPv6 Interface Identity is set in the IPv6 address of the PDN Address, and the address prefix (IPv6 Prefix) to be included in the IPv6 address is set to all zeros.

 Preferably, when the user mobility control management entity is the SGSN, the step of the SGSN indicating that the UE obtains the IP address from the home base station by using the IP address allocation manner defined by the IETF includes:

The SGSN instructs the UE to obtain an IP address from the home base station in an IP address allocation manner defined by the IETF by activating an Activate PDP Context Accept message. Preferably, the SGSN instructs the UE to obtain an IP address from the home base station by using an IP address allocation manner defined by the IETF by using a PDP Address Type and a PDP Address in the Activate PDP Context Accept message. ; among them,

 When the SGSN determines that the IP address assigned by the local network to the UE is an IPv4 address, the SGSN sets the PDP Address Type to IPv4 only, and sets the PDP Address to zero (ie, 0, 0.0.0);

 When the SGSN determines that the IP address assigned by the local network to the UE is an IPv6 address, the SGSN sets the PDP Address Type to IPv6 only, and assigns the IPv6 Interface Identity to the UE, and sets the IPv6 Interface Identit in the PDP Address;

 When the SGSN determines that the IP address assigned by the local network to the UE is an IPv4v6 address, the SGSN sets the PDP Address Type to IPv4v6, and sets the IPv4 address in the PDP Address to be zero (ie, 0.0.0.0), and assigns the IPv6 Interface Identity to the UE. The IPv6 Interface Identity is set in the IPv6 address of the PDP Address.

 Preferably, step S103 includes:

 The home base station allocates an IP address according to the request sent by the UE, and assigns an IP address to the UE through the Dynamic Host Configuration Protocol (DHCPv4) of version 4 and/or the IPv6 Stateless Address Autoconfiguration.

 The IP address assigned to the UE by the DHCPv4 is an IPv4 address, and the IP address assigned to the UE by the IPv6 stateless address self-configuration mode is an IPv6 address.

 E.g:

 For the HeNB, when the MME determines that the local network allocates an IPv4 address to the UE, the MME sets the Activate default EPS bearer context request message or the PDN Connectivity Accept message or the Attach Accept message, the PDN Type is IPv4 Only, and the PDN Address is set to zero (ie, 0.0. 0.0). The UE can determine that the IPv4 address needs to be obtained through DHCPv4 through the two identifiers of the PDN Type and the PDN Address. After completing the PDN connection between the UE and the local network, the UE can obtain the IPv4 address from the home base station by using DHCPv4.

In the actual encoding process, the PDN Type is defined together with the PDN Address, as shown in Table 1 below, where the PDNType value (Value) in the octet 3 is the defined PDN. Type, and byte 4 to byte 15 carry the true PDN Address information.

6 5 3 2

PDN address cell identifier (ΙΕΙ)

 Byte 4 to

 PDN address information Byte 15 Table 1

 Specifically, when the PDN Type is IPv4v6, byte 4 to byte 11 carry the IPv6 interface identifier, and bytes 12 to 15 carry the IPv4 address.

 The steps for the UE to obtain an IPv4 address from the home base station using DHCPv4 include:

 Step 1: The UE sends a Dynamic Host Configuration Protocol Discovery (DHCP Discovery) message to the Dynamic Host Configuration Protocol Server (DHCP Server), that is, the home base station.

 Step 2: The DHCP server responds to the UE and sends a dynamic host configuration protocol (DHCP Offer) message (multiple DHCP servers may exist in one network, because the same UE may be connected to the word.

 Festival

Received multiple DHCP Offer responses. This message already contains the IP address assigned to the UE in the client's IP domain, and contains the DHCP Server IP address in the server's IP domain.

 Step 3: The UE selects a DHCP Server (if there are multiple DHCP Servers), sends a Dynamic Host Configuration Protocol Request (DHCP Request) message to the DHCP Server, and requests the DHCP Server to allocate an IPv4 address. The request message includes parameters such as the client hardware address (Client hardware address) and the client identifier (Client Identifier). The Client hardware address is used to identify the UE. To prevent the client hardware address from colliding, the UE can also carry the Client Identifier parameter to uniquely identify itself.

Step 4: The DHCP Server assigns an IPv4 address to the UE and sends a Dynamic Host Configuration Protocol Acknowledgement (DHCP Ack) message to the UE. The "Your (client) IP address" contained in this message is the IPv4 address assigned to the UE. It also includes: Renewal Time Value of the IP address, and Rebinding Time Value of the IP address. , IP Address Lease Time, Subnet Mask of IP Address, Domain Name (Domain Name ), domain name server and other parameters.

Wherein, steps 1 and 2 of the discovery process DHCP Server; Step 3 and 4 are true IPv ⁴ address of the dynamic allocation.

 For the HeNB, when the MME determines that the local network allocates an IPv6 address to the UE, the MME sets the Activate Default EPS bearer context request message or the PDN Connectivity Accept message or the Attach Accept message, and the PDN Type is IPv6 Only, and assigns the IPv6 Interface Identity to the UE. The IPv6 Interface Identit is set in the PDN Address. Because the UE is required to obtain the IPv6 address through the IPv6 stateless address self-configuration mode, the UE can determine that the IPv6 stateless address self-configuration mode is required to obtain the IPv6 address through the two identifiers of the PDN Type and the PDN Address. After the UE connects to the PDN of the local network, the IPv6 stateless address self-configuration mode can be used to obtain an IPv6 address from the home base station.

 The steps for the UE to obtain an IPv6 address from the home base station using the IPv6 stateless address self-configuration mode include:

 The IPv6 router periodically multicasts (Multicast)-IPv6 Prefix through the Router Advertisement Message. After the IPv6 Prefix is obtained, the UE can automatically generate an IPv6 address by using the IPv6 Prefix and the IPv6 interface identifier, that is, the IPv6 address = IPv6 Prefix + IPv6 Interface Identity.

 The IPv6 router periodically multicasts the Router Advertisement message message at a certain interval. To speed up the address allocation process, the UE may request an IPv6 router to provide an IPv6 Prefix by sending a multicast Solicitation Message (Active Solicitation Message). After receiving the router request message, the IPv6 router immediately sends a Router Advertisement Message to the UE to provide an IPv6 Prefix for the UE.

 For the IPv6 stateless address self-configuration mode when accessing the local network, the IPv6 router described above is the home base station. That is to say, when the local network adopts an IPv6 stateless address self-configuration method to allocate an IP address to the UE, the home base station has the function of an IPv6 router.

The IPv6 address of the UE is composed of an IPv6 address prefix (IPv6 Prefix) and an IPv6 Interface Identity. Since the IPv6 address of the UE corresponds to the IPv6 Prefix, the IPv6 Interface is used. The Identity can take the same value for different UEs. The IPv6 Interface Identity assigned by the MME to the UE is different from the MME's own IPv6 Interface Identit.

 For the HeNB, when the MME determines that the local network allocates an IPv4v6 address to the UE, the MME sets the Activate default EPS bearer context request message or the PDN Connectivity Accept message or the Attach Accept message, the PDN Type is IPv4v6, and sets the IPv4 address part in the PDN Address to be full. Zero (ie 0.0.0.0), an IPv6 Interface Identity of 8 bytes in length is set in the IPv6 address part of the PDN Address. This IPv6 Interface Identity is assigned by the MME. The UE can determine that the IPv4 address needs to be obtained through DHCPv4 through the two identifiers of the PDN Type and the PDN Address, and obtain the IPv6 address through the IPv6 stateless address self-configuration. Therefore, after completing the PDN connection of the UE to the local network, the UE can obtain the IPv4 address from the home base station by using DHCPv4, and can obtain the IPv6 address from the home base station by using the IPv6 stateless address self-configuration mode.

 For the HNB, when the SGSN determines that the IP address assigned by the local network to the UE is an IPv4 address, the SGSN sets the PDP Address Type in the Activate PDP Context Accept message to IPv4 Only, and sets the PDP Address to zero (ie, 0.0.0.0). The UE can determine that the IPv4 address needs to be obtained through DHCPv4 through the two identifiers of the PDP Address Type and the PDP Address. After completing the PDN connection between the UE and the local network, the UE can obtain the IPv4 address from the home base station by using DHCPv4. And similarly, as in Table 1, in the actual encoding process, the PDP Address Type and PDP Address are defined together.

 For the HNB, when the SGSN determines that the IP address assigned by the local network to the UE is an IPv6 address, the SGSN sets the PDP Address Type in the Activate PDP Context Accept message to IPv6 Only, and assigns the IPv6 Interface Identity to the UE, and sets the IPv6 Interface Identity to the PDP. In the Address. The UE can determine that the IPv6 stateless address is required to obtain an IPv6 address through the PDP Address Type and the PDP Address. After completing the PDN connection between the UE and the local network, the UE can use the IPv6 stateless address self-configuration mode. The home base station obtains an IPv6 address.

For HNB, when the SGSN determines that the IP address assigned by the local network to the UE is an IPv4v6 address When the SGSN sets the PDP Address Type in the Activate PDP Context Accept message to IPv4v6, and sets the IPv4 address part in the PDP Address to all zeros (ie 0.0.0.0), and sets an 8-byte in the IPv6 address part of the PDP Address. The length of the IPv6 Interface Identity. The UE can determine that the IPv4 address needs to be obtained through DHCPv4 through the two identifiers of the PDP Address Type and the PDP Address, and obtain the IPv6 address through the IPv6 stateless address self-configuration mode. Therefore, after completing the PDN connection of the UE to the local network, the UE may obtain an IPv4 address from the home base station by using DHCPv4, and may obtain an IPv6 address from the home base station by using an IPv6 stateless address self-configuration manner.

 The above IPv6 Interface Identity is randomly calculated by the MME or the SGSN using a random algorithm according to the identity of the UE. Since the MME or SGSN serves a large number of users in the prior art, the number of UEs served by one MME or SGSN can reach 1 million, and the IPv6 Interface Identity calculated by a random algorithm is easy to communicate with the IPv6 Interface of the PDN GW or GGSN. The identity is the same, so the IPv6 Interface Identity of the UE is not allocated by the MME or the SGSN in the existing specifications. However, the embodiment of the present invention proposes that for the home network or the local Internet network, since the number of users serving the service is small, it is hardly More than 1000, so even if the MME or SGSN obtains the IPv6 Interface Identity of 8 bytes in length, the same situation as the IPv6 Interface Identity of the home base station does not occur (in the home network or the local Internet network, it is the home base station). The IP address allocation of the UE is performed. Therefore, the IPv6 Interface Identity calculated by the MME or the SGSN cannot be the same as the IPv6 Interface Identity of the home base station.

 In addition, since there may be multiple UEs accessing the home network or the local Internet network at the same time, the home network or the local Internet network may not be: the UEs allocate different IPv6 Prefix, so each IPv6 Interface calculated by the MME or the SGSN Identity does not repeat as much as possible. At the same time, the UE is required to use the IPv6 Interface Identity provided by the MME or the SGSN, and try not to use the UE's own Interface Identity.

 For example, the random algorithm used by the MME or SGSN is:

 f(n) = f(n - l) + l , where n is an integer greater than or equal to zero.

f(0) is any 8-byte long data, when the MME or SGSN increments F(n) every time. The latter value is assigned to the UE as an IPv6 Interface Identity. Obviously this algorithm can guarantee that the IPv6 Interface Identity assigned to the UE will not be repeated in a home network or a local Internet network.

 Preferably, in the process of determining, by the MME or the SGSN, the type of the IP address allocated by the local network to the UE, the MME/SGSN may further determine the IP address allocated by the local network to the UE according to the IP address type that the local network can support. The type, that is, the type of IP address assigned by the local network determined by the MME or the SGSN to the UE, needs to be an IP address type that the local network can support.

 There are many ways for the MME/SGSN to know the type of IP address that the local network can support. For example: One method is to support the local network through OAM (Operation, Administration and Maintenance) or other methods. The IP address type information is pre-configured to the MME/SGSN.

 Another method is that the home base station actively reports the IP address type information that can be supported by the local network connected to itself to the MME or the SGSN. Alternatively, the home base station reports the local network connected to itself according to the request of the MME or the SGSN. IP address type information.

 The triggering conditions for the home base station to automatically report the IP address type information that can be supported by the local network may also be multiple, when the home base station is started, or when the home network of the home base station changes, for example, the home base station is not connected. The local network, when the home base station is connected to a local network or the local network function is activated, the home base station automatically reports the IP address type supported by the local network to which the home base station is connected to the MME/SGSN.

 In addition, in the case that the UE accesses the local network, the UE obtains the IPv4 address through DHCPv4, and/or the IPv6 address obtained through the IPv6 stateless address self-configuration mode, which is allocated by the home base station. When the home base station supports the home network or the local Internet network, the home base station has the function of assigning an IPv4 address by using DHCPv4 and assigning an IPv6 address by using an IPv6 stateless address self-configuration manner.

From the perspective of the UE, the IP address of the UE is provided by the home base station, that is, by the home base station. There are two situations at this time: one situation is that the home base station has an IP address pool, and the IP address assigned to the UE is from the IP address pool; the other case is that the home base station does not have one. T N2010/00 559 IP address pools, the Π> address assigned by the home base station to the UE is actually provided by a device in the home network or the local Internet network, and the home base station can adopt the Diameter protocol defined in the 3GPP specifications. Or, the Radius (Remote Authentication Dial In User Service) protocol, or DHCP obtains an IP address from a device on the home network or the local Internet network, and then assigns the IP address to the UE and sends the IP address to the UE.

 The following is a specific embodiment of three implementations of the UE to access the local network provided by the embodiment of the present invention. Example 1

 Referring to FIG. 3, the UE Requested PDN Connectivity process provided by the embodiment of the present invention includes the following steps:

 1. If the UE needs to initiate a PDN connection, the UE sends a PDN Connectivity Request (PDN Connectivity Request) message to the HeNB, and the HeNB forwards the PDN Connectivity Request message to the Mobility Management Entity (MME).

 The PDN Connectivity Request message includes: Access Point Name (APN), PDN Type, Protocol Configuration Options, and Request Type.

 Both the APN and the Request Type carried in the PDN Connectivity Request can be used to indicate the type information of the local network that the UE requests to access, but in the case that the UE is allowed to access multiple local networks of the same type, if the UE requests to be clear Which specific local network is entered, an APN is required to indicate.

 If the newly established PDN connection of the UE is to the home network, the UE may set the Request Type in the PDN Connectivity Request message to be a Home Request.

 If the newly created PDN connection of the UE is to the local Internet network, the UE may set the Request Type in the PDN Connectivity Request message to be an Internet Request (Internet Request).

 That is, when the Request Type is Home Request, the UE requests access to the home network; when the Request Type is Internet Request, the UE requests access to the local Internet.

 2. After receiving the PDN Connectivity Request message, the MME sends a PDN Connectivity Accept message to the HeNB.

It should be noted that the message sent by the MME to the HeNB in step 2 is for TS23.401. The protocol is PDN Connectivity Accept, and for the TS24.301 protocol is the Activate default EPS bearer context request message. But in fact these two messages are the same message, and different names are used in different protocols.

 The PDN Connectivity Accepti or its equivalent message includes: APN, PDN Type, PDN Address, EPS Bearer Id, and Protocol Configuration Options.

 The MME determines that the UE requests access to the local network according to the APN and/or Request Type in the received PDN Connectivity Request message. Then, the MME determines the PDN Connectivity Accept (or its equivalent message EPS default) based on the IP address type of the PDN Type in the PDN Connectivity Request message, the subscription data of the UE, and the IP address type in the configuration of the MME. ) The PDN Type in the message.

 When the MME determines that the IP address assigned by the local network to the UE is an IPv4 address, the MME sets the PDN Type to IPv4 Only, and sets the PDN Address to be zero (ie, 0.0.0.0); when the MME determines that the IP address assigned by the local network to the UE is IPv6. When the address is set, the MME sets the PDN Type to IPv6 Only, and assigns the IPv6 Interface Identity to the UE, sets the IPv6 Interface Identity in the PDN Address, and sets the IPv6 Prefix in the IPv6 address to all zeros; when the MME determines that the local network is the UE When the assigned IP address is an IPv4v6 address, the MME sets the PDN Type to IPv4v6, and sets the IPv4 address in the PDN Address to zero (ie, 0.0.0.0), assigns the IPv6 Interface Identity to the UE, and sets the IPv6 Interface Identity to the PDN Address. In the IPv6 address, set the IPv6 Prefix in the IPv6 address to all zeros.

 The PDN Connectivity Accept (or its equivalent message) message is included in an SI-MME control message, which is included in the Bearer Setup Request message. in. The S1-MME interface refers to a control plane interface between the HeNB and the MME.

The Bearer Setup Request message includes: EPS Bearer QoS, UE Aggregated Maximum Bit Rate (UE-AMBR), PDN Connectivity Accept (or its equivalent message Default EPS bearer context) Request ) , the tunnel endpoint identifier (S 1 - TEID, S 1 Tunnel End Point Identifier ) of the SI user plane interface (ie, the interface between the HeNB and the Serving GW).

 The Bearer Setup Request message includes an EPS bearer identifier (EPS Bearer Identity), and a serving gateway (Serving GW) that allocates the HeNB and the serving gateway (the Serving GW) for the EPS bearer identified by the EPS Bearer Identity. The upstream IP address and tunnel end point identifier (TEID, Tunnel End Point Identifier) of the user plane interface (S1-U interface).

 The MME needs to notify the HeNB that the bearer established for the UE is used by the local network, because when the HeNB receives the data sent by the UE to the local network, the HeNB cannot forward the data to the serving gateway (Serving GW) in the core network. And to forward to the local network. If it is not required to transfer to the local network, the HeNB forwards to the Serving GW in the core network when receiving the data sent by the UE to the mobile operator network.

 Therefore, the new MME may notify the HeNB of the information of the local network that the UE requests to access by using a Bearer Setup Request message to instruct the HeNB to establish a local network for the UE.

 Since the local network may be a home network or a local Internet network. In addition, there may be one or more home networks for the home network, so the local network also needs to notify the HeNB of the information of which specific local network the UE accesses.

 A network (including the local network) can be identified by an APN. Therefore, the manner in which the MME informs the HeNB that the bearer is used for a specific local network may include:

 Mode 1: The MME sets an APN in the Bearer Setup Request message to indicate specific local network information.

 Manner 2: If the HeNB can only connect to at most one home network or one local Internet network, the MME can set an indication message in the Bearer Setup Request message to indicate whether the home network or the local Internet connection is connected. The network, for example, uses 0 for the home network and 1 for the local Internet network.

3. The HeNB receives the PDN Connectivity Accept (or its equivalent message Activate default) After the EPS bearer context request message, the RRC Connection Reconfiguration (RRC Connection Reconfiguration) message is sent to the UE.

 The RRC Connection Reconfiguration message includes: an EPS Radio Bearer Identity, and a PDN Connectivity Accept (or its equivalent message) message is also included in the RRC message and transmitted to the UE.

 After receiving the RRC Connection Reconfiguration message, the UE sends a radio resource control connection reconfiguration complete (RRC Connection Reconfiguration Complete) message to the HeNB.

 So far, through steps 3 and 4, the establishment of wireless bearer access to the local network between the HeNB and the UE is completed.

 After receiving the RRC Connection Reconfiguration Complete message, the HeNB sends a bearer setup response (Bearer Setup Response) message to the MME.

 Through steps 2 to 5, the bearer between the UE and the local network is established. Since the bearer between the UE and the local network does not include the bearer of the core network part, the bearer between the UE and the local network is actually a radio bearer between the UE and the HeNB.

 After parsing the PDN Connectivity Accept (or its equivalent message EPS address) message from the RRC Connection Reconfiguration Complete message, the UE:

 If the PDN Type is IPv4 only (IPv4 Only) and the PDN Address is zero (that is, 0.0.0.0), use DHCPv4 to obtain an IPv4 address after step 6.

 If the PDN Type is IPv6 Only (IPv6 Only), obtain the IPv6 Interface Identity stored in the PDN Address, and use the IPv6 stateless address self-configuration method to obtain an IPv6 Prefix after step 6, and then according to the IPv6 Interface Identit and IPv6 Prefix. Generate an IPv6 address;

If the PDN Type is IPv4v6, and the IPv4 part of the PDN Address is zero (ie, 0.0.0.0), obtain the IPv6 Interface Identity stored in the PDN Address, and use the DHCPv4 method to obtain an IPv4 address and use it after step 6. IPv6 stateless address self-configuration method to obtain an IPv6 Prefix, and then generate one according to IPv6 Interface Identity and IPv6 Prefix. IPv6 address.

 ό, the UE sends a Direct Transfer message to He B.

 The Direct Transfer message includes the PDN Connectivity Complete (PDN Connectivity Complete). The message sent by the UE to the HeNB in step 6 is the PDN Connectivity Complete message for the TS23.401 protocol and the activation default for the TS24.301 protocol. The EPS defaults the bearer context response message, but in fact the two messages are the same message, except that different names are used in different protocols.

 The EPS Bearer Identity is included in the PDN Connectivity Complete message (or its equivalent message Activate default EPS bearer context Response ).

 7. After receiving the Direct Transfer message, the HeNB forwards the PDN Connectivity Complete message (or its equivalent message Activate default EPS bearer) in the uplink non-access stratum (NAS, Non-Access Stratum) transmission (Uplink NAS Transport) message. Context Response ) To the MME, the EPS Bearer Identity is included in the PDN Connectivity Complete message (or its equivalent message Default EPS bearer context Response ).

 After the foregoing UE Request PDN Connectivity process is complete, the UE obtains an IP address through the DHCPv4 and/or IPv6 stateless address self-configuration mode, and can connect to the local network through the HeNB, and communicate with devices in the local network through the HeNB.

 Example 2:

 Referring to FIG. 4, the attach process provided by the embodiment of the present invention specifically includes the following steps:

1. The UE initiates an attach procedure, and sends an attach request (Attach Request) message to the HeNB. The Attach Request message includes: an International Mobile Subscriber Identity (IMSI) or an old Globally Unique Temporary Identity (GUTI), a recently visited tracking area identifier (last visited TAI) (if available), the UE's UE Core Network Capability, UE's Special Discontinuous Reception (DRX) parameter, PDN Type (PDN Type), Protocol Configuration Options, Ciphered Options Transfer Flag , attachment type (Attach Type), key 10 000559 identifier (KSIASME), NAS, Non-Access Stratum serial number (NAS sequence number), non-access layer message authentication code (NAS-MAC, Message Authentication Code), additional GUTI (additional GUTI) ).

 If the UE is initially connected to the EPS system, the UE notifies the network of the information requested by the UE to access the local network by the following method:

 If the type of the local network that the UE requests to access is the home network, the UE may set the Attach Type in the Attach Request message to be Home Attach.

 If the type of the local network that the UE requests to access is the local Internet network, the UE may set the Attach Type in the Attach Request message to be an Internet Attach.

 The present invention provides that the Attach procedure according to the embodiment of the present invention includes the UE requesting a packet data network connection (UE) according to the definition of the TS 24.301 standard according to the TS24.301 standard and the TS23.401 standard. The Request PDN Connectivity procedure, and in the process, the UE may set the Request Type to a Home Request or an Internet Request in a PDN Connectivity Request message sent to the MME. (Internet Request), used to notify the network side of the information that the UE requests to access the local network. That is, when the Request Type is Home Request, the information requested by the UE to access the local network is requested by the UE to access the home network; when the Request Type is Internet Request, the information requested by the UE to access the local network is requested by the UE to access the local Internet.

 It should be noted that the "Home Attach", "Internet Attach", "Home Request" and "Internet Request" given in the embodiments of the present invention are only specific names for indicating the information requested by the UE to access the local network, of course. Other specific names may also be used to indicate information that the UE requests to access the local network.

 2. The HeNB sends an S1-MME control message, that is, the HeNB sends an Initial UE message to the new MME (new MME), and the message includes an Attach Request message.

The TS24.301 standard states that the Attach Request message contains a PDN Connectivity Request message, and the MME according to the Attach Type and/or PDN in the Attach Request message. The Request Type in the Connectivity Request can know which type of local network the UE is to access. Therefore, when only one network is allowed for the user to access the same type of local network to which the HeNB is connected, the Attach Request message and/or the PDN Connectivity Request message only indicate the type of the local network. The network side can know which local network the UE requests to access.

 3. The new MME sends an identification request (Authentication Request) message to the old MME or SGSN (old MME/SGSN). After receiving the Identification Request message, the old MME or SGSN replies to the new MME with an identification response (Identification Response) message. , which contains the IMSI of the UE.

 4. If the new MME and the old MME or the SGSN do not know the UE, the new MME sends an Identity Request message to the UE, and requests the UE to provide its MSI. After receiving the Identity Request message, the UE responds with an identity response. The ( Identity Response ) message is sent to the new MME, which contains the IMSI of the UE.

 5a. Depending on the conditions, the new MME performs authentication and/or security procedures (Authentication/Security).

 5b. The new MME obtains the mobile terminal identifier (ME Identity) of the UE, and sends a ME Identity Check Request message to the device identifier register (EIR, Equipment Identity Register), where the UE includes the ME Identity and the IMSI of the UE. After receiving the ME Identity Check Request message, the EIR replies to the new MME with a Mobile Identity Identification Ack (ME Identity Check Ack) message, which includes a Result.

6. If the UE carries the Ciphered Options Transfer Flag in the Attach request message, after the network activates the encryption, the new MME sends a Ciphered Options Request message (defined in the TS23.401 standard). ), that is, the ESM Information Request message (which is defined in the TS24.301 standard, equivalent to the Ciphered Options Request message defined in the TS23.401 standard), requests the UE to obtain the protocol configuration. Option (PCO, protocol Configuration Options) information and/or access point name (APN) information. After the UE receives the Ciphered Options Request message, Reply to the Ciphered Options Response message (defined in TS23.401), ie ESM Information Response (Evolved Session Management Information Response) message (this message is defined in the TS24.301 standard, equivalent to Ciphered Options Response Message) to the new MME to provide PCO and / or APNo

 7. If the new MME finds that the UE has active bearer contexts, the new MME sends a Delete Bearer Request message to the relevant gateway.

(GW), which contains the cause of the deletion (Cause) and the Tunnel End Point Identifier (TEID), to delete these bearer contexts, and the related gateway (GWs) reply to delete the bearer response (Delete Bearer Response) The message is sent to the new MME, which contains the tunnel endpoint identifier (TEIDs). If the Policy and Charging Rules Function (PCRF) is deployed, the packet data network gateway (PDN GW) performs the IP connection network session.

(IP-CAN Session Termination) process.

 It can be seen that the role of step 7 is that when the new MME and the old MME are the same MME, the new MME clears the EPS bearer that has not been deleted in the network before the UE attaches.

 8. The new MME sends an Update Location Request message to the Home Subscriber Server (HSS).

 The Update Location Request message includes: MME Identity (MME Identity), IMSI, ME Identity, MME Capabilities, and Update Type.

 9. The HSS sends a Cancel Location message to the old MME and the old SGSN, including: IMSI and Cancellation Type. After receiving the Cancel Location message, the old MME and the old SGSN reply to the HSS with a Cancel Location Ack message.

 10. If the old MME/SGSN finds that the UE has active bearer contexts, the old MME/SGSN sends a Delete Bearer Request message to the relevant GW to request to delete the bearer context. , including the reason for deletion

( Cause ) and TEID. After receiving the Delete Bearer Request message, the related GW replies with a Delete Bearer Response message to the old MME/SGSN, which includes 0/000559

TEIDo If the PCRF is deployed, the PDN GW performs the IP-CAN Session Termination process.

 11. The HSS sends an Update Location Ack message to the new MME, where the subscription data includes the IMSI and the UE, and the Subscription Data includes one or more packet data networks (PDN, Packet). Data Network ) Signing Context

( PDN subscription context ) , each PDN subscription context contains an EPS subscribed QoS profile and the subscribed APN-AMBR (Access Point Name) aggregated maximum bit rate (AMBR, Aggregated) Maximum Bit Rate ) ).

 In summary, step 8-11 is a location information update process, that is, the HSS deletes the stored old MME identity information, and adds new MME identity information, that is, the new MME registers with the HSS as the current mobile control management for the UE. Entity node.

 12. The new MME sends an Attach Accept message to the HeNB.

 The Attach Accept message includes: APN, GUTI, PDN Type, PDN Address, TAI, Tracking Area Identity list (TAI List), EPS Bearer Identity, Session Management Request (Session Management Request) , Protocol Configuration Options, Key Identification (KSIASME), NAS sequence number, NAS-MACo

 It should be noted that, in the TS24.301 protocol, the Session Management Request message in the Attach Accept message is actually an Activate default EPS bearer context request message, and the PDN is displayed. The Type, PDN Address parameter is actually included in the Activate default EPS bearer context request message. For convenience of explanation, the TS23.401 protocol directly indicates that the Attach Accept message contains the PDN Type and PDN Address parameters.

The MME determines that the UE requests access to the local network according to the APN and/or the Request Type in the PDN Connectivity Request message received in step 2. Then, the MME is based on the IP address of the PDN Type in the PDN Connectivity Request message. 559 type, UE subscription data, IP address type in the MME configuration determines the PDN Type in the Activate default EPS bearer context request message.

 When the MME determines that the IP address assigned by the local network to the UE is an IPv4 address, the MME sets the PDN Type to IPv4 Only, and sets the PDN Address to be zero (ie, 0.0.0.0); when the MME determines that the IP address assigned by the local network to the UE is IPv6. When the address is set, the MME sets the PDN Type to IPv6 Only, and assigns the IPv6 Interface Identity to the UE, sets the IPv6 Interface Identit in the PDN Address, and sets the IPv6 Prefix in the IPv6 address to all zeros; when the MME determines that the local network is the UE When the assigned IP address is an IPv4v6 address, the MME sets the PDN Type to IPv4v6, and sets the IPv4 address in the PDN Address to zero (ie, 0.0.0.0), assigns the IPv6 Interface Identity to the UE, and sets the IPv6 Interface Identity to the PDN Address. In the IPv6 address, set the IPv6 Prefix in the IPv6 address to all zeros.

 The Attach Accept message is included in an S 1 - MME control message (S 1 - MME Interface Control Message), which is included in the Initial Context Setup Request message. The SI control message includes the uplink IP address and TEID of the S1-U interface allocated by the EPS Bearer Identity and the Serving GW for the EPS bearer identified by the EPS Bearer Identity.

 The MME needs to notify the HeNB that the bearer established for the UE is used by the local network. Therefore, in the same manner as the first embodiment, the eNB may notify the HeNB that the bearer established for the UE is the local network. in use.

 13. The HeNB sends a RRC Connection Reconfiguration (RRC Connection Reconfiguration) message to the UE, where the EPS Radio Bearer Identity is included, and the Attach Accept message is also included in the RRC message and transmitted to the UE.

 14. The UE sends a RRC Connection Reconfiguration Complete message to the HeNB.

 So far, through step 13 and step 14, the establishment of the access local network radio bearer between the HeNB and the UE is completed.

The UE parses out the Activate from the RRC Connection Reconfiguration Complete message. After the default EPS bearer context request message:

 If the PDN Type is IPv4 only (IPv4 Only) and the PDN Address is zero (ie 0.0.0.0), then use DHCPv4 to obtain an IPv4 address after step 16; or

 If the PDN Type is IPv6 Only (IPv6 Only), obtain the IPv6 Interface Identity stored in the PDN Address, and obtain an IPv6 Prefix using the IPv6 stateless address self-configuration method after step 16, and then according to the IPv6 Interface Identity and IPv6 Prefix. Generate an IPv6 address; or

 If the PDN Type is IPv4v6, and the IPv4 part of the PDN Address is zero (ie, 0.0.0.0), obtain the IPv6 Interface Identity stored in the PDN Address, and use the DHCPv4 method to obtain an IPv4 address after step 16 and use The IPv6 stateless address is self-configured to obtain an IPv6 Prefix, and then generates an IPv6 address based on the IPv6 Interface Identity and the IPv6 Prefix.

 15. The HeNB sends an Initial Context Response message to the new MME, which includes the downlink IP address and TEID of the S1-U interface (ie, the user plane interface between the HeNB and the Serving Gateway) assigned by the HeNB.

 Through steps 12 to 15, the radio bearer between the UE and the local network is established. Since the bearer between the UE and the local network does not include the bearer of the core network part, the bearer between the UE and the local network is actually a radio bearer between the UE and the HeNB.

 16. The UE sends a Direct Transfer message to the HeNB, and the message includes an Attach Complete message.

 The Attach Complete message includes: EPS Bearer Identity, NAS sequence number, NAS-MAC.

 As indicated in the TS24.301 protocol, the Attach Complete message also includes an Activate Default EPS bearer context Response message.

 17. The HeNB forwards the Attach Complete message to the new MME in an Uplink NAS Transport message.

After the above Attach process is completed, the UE self-configures through DHCPv4 and/or IPv6 stateless addresses. The method obtains an IP address, and can connect to the local network through the HeNB, and communicate with devices in the local network through the HeNB.

 Example 3:

 Referring to FIG. 5, the process of the PDN Context requested by the UE according to the embodiment of the present invention specifically includes the following steps:

 1. If the UE needs to initiate a PDN connection, the UE sends an Activate PDP Context Request message to the HNB, and the HNB forwards the Activate PDP Context Request message to the Serving General Packet Radio Service Support Node (SGSN). .

 It should be noted that there may be a home base station gateway (HNB GW) between the HNB and the SGSN. If there is an HNB GW, the HNB GW transparently transmits the message between the UE and the SGSN, that is, in the process, all the messages are transparent to the HNB GW, that is, the HNB GW does not interpret the UE and the SGSN. The message transmitted between them is only to forward the message between the UE and the SGSN.

 In addition, by activating the Activate PDP Context Request message, the UE establishes the first packet data protocol context (PDP Context) under this PDN connection, that is, activates the packet data protocol context request (Activate PDP Context). The Request message is used to establish a PDP Context under a PDN connection. Then, if the UE needs to establish a PDP Context under this PDN connection, the UE needs to initiate a second activation of the packet data protocol context procedure. The sent message is an Activate Secondary PDP Context Request message. By analogy, if the UE needs to establish the nth (n is an integer greater than 1) PDP Context under the same PDN connection, the process initiated by the UE is the second activation of the packet data protocol context procedure, which is used by the UE in the process. The message is an Activate Secondary PDP Context Request message. And, the APN parameter is not included in the Activate Secondary PDP Context Request message.

 The Activate PDP Context Request message includes: APN, PDN Type, Protocol Configuration Options, and Request Type.

It should be noted that the APN and Request Type parameters are optional parameters. Especially in the edition In the specification version before this 8, the Activate PDP Context Request message does not include the Request Type parameter.

 Both the APN and the Request Type carried in the Activate PDP Context Request can be used to indicate the type information of the local network that the UE requests to access, but in the case that the UE is allowed to access multiple local networks of the same type, if the UE request is to be clarified Which specific local network is accessed, an APN is required to indicate.

 If the PDN connection established by the UE is a home network, the UE may set the Request Type in the Activate PDP Context Request message to be a Home Request.

 If the PDN newly created by the UE is connected to the local Internet network, the UE may set the Request Type in the Activate PDP Context Request message to be an Internet request.

 That is, when the Request Type is the Home Request, the information of the local network that the UE requests to access is the information of the home network that the UE requests to access; when the Request Type is the Internet Request, the UE requests the access of the local network. The information is the local Internet letter that the UE requests to access.

2. After receiving the Activate PDP Context Request message, the SGSN sends a radio access bearer assignment request (RAB Assignment Request) message to the HNB, requesting the HNB to establish an access bearer of the UE to the local network.

 The radio access bearer assignment request (RAB Assignment Request) message includes a radio access bearer identifier (RAB ID), and an HNB assigned by the SGSN for the radio access bearer (RAB, Radio Access Bearer) identified by the RAB ID. The upstream IP address and tunnel end point identifier (TEID, Tunnel End Point Identifier) of the user plane interface (Iu-PS user plane interface) between the SGSNs.

 The SGSN needs to notify the HNB that the bearer established for the UE is used by the local network. Therefore, in the same manner as Embodiment 1, the SGSN may use the Radio Access Bearer Assignment Request (RAB Assignment Request) message, and adopt the method in Embodiment 1. 1 or 2 to inform the HNB that the bearer established for the UE is used by the local network.

3. After receiving the RAB Assignment Request message, the HNB sends the wireless bearer setting (Radio). 9

Bearer Setup) Message to the UE.

 The Radio Bearer Setup message includes: Radio Bearer Identity (RB ID), and the RB ID is the same as the RAB ID in step 2 above.

 4. After receiving the Radio Bearer Setup message, the UE sends a Radio Bearer Setup Complete message to the HNB.

 So far, through steps 3 and 4, the establishment of the radio bearer of the local network between the HNB and the UE is completed.

 5. After receiving the Radio Bearer Setup Complete message, the HNB sends a Radio Access Bearer Assignment Response (RASB Assignment Response) message to the SGSN.

 Through steps 2 to 5, the establishment of the bearer between the UE and the local network is completed. Since the bearer between the UE and the local network does not include the bearer of the core network part, the bearer between the UE and the local network is actually a radio bearer between the UE and the HNB.

^After receiving the RAB Assignment Response message, the SGSN sends an Activate PDP Context Accept message to the UE, including the PDP Address Type and the PDP Address.

 The SGSN determines that the UE requests access to the local network according to the APN and/or the Request Type in the Activate PDP Context Request message received in step 1. Then, the SGSN determines the PDP Address in the Activate PDP Context Response message according to the IP address type of the PDP Address Type in the Activate PDP Context Request message, the subscription data of the UE, and the IP address type in the configuration of the SGSN.

When the SGSN determines that the IP address assigned by the local network to the UE is an IPv4 address, the SGSN sets the PDP Address Type to IPv4 Only, and sets the PDP Address to be zero (ie, 0.0.0.0); when the SGSN determines that the IP address assigned by the local network to the UE is In the IPv6 address, the SGSN sets the PDP Address Type to IPv6 Only, and assigns the IPv6 Interface Identity to the UE, sets the IPv6 Interface Identity in the PDP Address, and sets the IPv6 Prefix in the IPv6 address to all zeros; when the SGSN determines the local When the IP address assigned by the network to the UE is an IPv4v6 address, the SGSN sets the PDP Address Type to IPv4v6 and sets the IPv4 address in the PDP Address. Zero (ie 0.0.0.0), the IPv6 Interface Identity is assigned to the UE, the IPv6 Interface Identity is set in the IPv6 address of the PDP Address, and the address prefix (IPv6 Prefix) in the IPv6 address is set to all zeros.

 After receiving the Activate PDP Context Accept message, the UE:

 If the PDP Address Type is IPv4 Only and the PDP Address is zero (that is, 0.0.0.0), DHCPv4 is used to obtain an IPv4 address.

 If the PDP Address Type is IPv6 Only, the IPv6 Interface Identity is obtained in the PDP Address, and an IPv6 Prefix is obtained by using the IPv6 stateless address self-configuration method. Then, an IPv6 address is generated according to the IPv6 Interface Identity and the IPv6 Prefix.

 If the PDP Address Type is IPv4v6, and the IPv4 part of the PDP Address is zero (ie, 0.0.0.0), obtain the IPv6 Interface Identity stored in the PDP Address, and then use DHCPv4 to obtain an IPv4 address and use The IPv6 stateless address is self-configured to obtain an IPv6 Prefix, and then generates an IPv6 address based on the IPv6 Interface Identity and the IPv6 Prefix.

 After the Activate PDP Context process is complete, the UE can connect to the local network through the HNB and communicate with the devices on the local network through the HNB.

 The system provided by the embodiment of the present invention is described below.

 Referring to FIG. 6, a communication system provided by an embodiment of the present invention includes:

 The user mobility control management entity 11 is configured to: according to the information of the local network that the user equipment UE 12 requests to access, instruct the home base station 13 to establish the radio bearer of the local network for the UE 12, and connect the UE 12 to the local network; The network assigns the type of Internet Protocol IP address to the UE 12 and instructs the UE 12 to obtain this type of IP address from the home base station.

 The home base station 13 is configured to send, by the user mobility control management entity 11, an indication that the UE 12 establishes a bearer of the local network, establish a radio bearer of the local network for the UE 12, and allocate an IP address according to the request sent by the UE 12. A message is assigned to the UE 12 with an IP address.

The user mobility control management entity 11 described in the embodiment of the present invention is a device for controlling IP address allocation. Preferably, the user mobility control management entity 11 includes:

 The access local network indication unit 111 is configured to, according to the information of the local network that the UE 12 requests to access, instruct the home base station 13 to connect the UE 12 to the local network by establishing a wireless bearer of the local network for the UE 12.

 The IP address type determining unit 112 is configured to determine, according to the configuration information of the user mobility control management entity 11 and the type of the IP address that the UE 12 requests to be allocated and the subscription data of the UE 12, the IP address allocated by the local network to the UE 12. type.

 The IP address obtaining indication unit 113 is configured to instruct the UE 12 to acquire, from the home base station 13, an IP address of a type determined by the IP address type determining unit 111 for the UE 12.

 Preferably, the IP address type determining unit 112 obtains the type of the IP address supported by the local network through the reporting by the home base station 13.

 Preferably, when the user mobility control management entity 11 is an MME, the IP address acquisition indication unit 113 accepts a (PDN Connectivity Accept) message through a packet data network connection or activates a default EPS bearer context request (Activate default The EPS bearer context request ) message, or an Attach Accept message, instructs the UE 12 to obtain an IP address from the home base station 13.

Preferably, the IP address obtaining indication unit 113 indicates the UE 12 by using a PDN Connectivity Accept message or an Activate default EPS bearer context request message or an Attach Accept message, a packet data network type PDN Type and a packet data network address PDN Address. Obtaining an IP address from the home base station 13; wherein, in the version 4 of the Internet Protocol IPv4 address, the IP address acquisition instructing unit 113 sets the PDN Type to IPv4 only, and sets the PDN Address to be zero; when the version 6 Internet Protocol IPv6 address, The IP address acquisition instructing unit 112 sets the PDN Type to IPv6 only, and assigns an IPv6 interface identifier to the UE 12, and sets the IPv6 Interface Identity in the PDN Address. When the IP address type determining unit 112 determines that the IP address assigned by the local network to the UE 12 is the Internet Protocol IPv4v6 address of Release 4 and Version 6, the IP address acquisition instructing unit 113 sets the PDN Type to IPv4v6, and sets the PDN Address. The IPv4 address is zero, the IPv6 Interface Identity is assigned to the UE 12, and the IPv6 Interface Identity is set in the IPv6 address of the PDN Address.

 Preferably, when the user mobility control management entity 11 is an SGSN, the IP address obtaining indication unit 113 receives an Activate PDP Context Accept message by activating a packet data protocol context, and instructs the UE 12 to acquire an IP address from the base station 13.

 Preferably, the IP address acquisition instructing unit 113 instructs the UE 12 to obtain an IP address from the home base station 13 by using the packet data protocol address type PDP Address Type and the packet data protocol address PDP Address in the Activate PDP Context Accept message.

 When the IP address type determining unit 112 determines that the IP address assigned by the local network to the UE 12 is the Internet Protocol IPv4 address of the version 4, the IP address acquisition instructing unit 113 sets the PDP Address Type to IPv4 only, and sets the PDP Address to Zero

 When the IP address type determining unit 112 determines that the IP address assigned by the local network to the UE 12 is the Internet Protocol IPv6 address of the version 6, the IP address acquisition instructing unit 113 sets the PDP Address Type to IPv6 only, and is the UE 12 Assign the interface identifier to the IPv6 Interface Identity, and set the IPv6 Interface Identity in the PDP Address.

 When the IP address type determining unit 112 determines that the IP address assigned by the local network to the UE 12 is the Internet Protocol IPv4v6 address of Release 4 and Version 6, the IP address acquisition instructing unit 113 sets the PDP Address Type to IPv4v6, and sets the PDP. The IPv4 address in the Address is zero, and the UE 12 is assigned an IPv6 interface identifier, and the IPv6 Interface Identity is set in the IPv6 address of the PDP Address.

 Preferably, the home base station 13 includes:

 The bearer establishing unit 131 is configured to establish, according to the user mobility control management entity 11, an indication that the UE 12 establishes a bearer of the local network, and establish a radio bearer of the local network for the UE 12.

The receiving request unit 132 is configured to receive a message sent by the UE 12 requesting to allocate an IP address. N2010/000559

The IP address allocating unit 133 is configured to allocate an IP address to the UE 12 according to a request for the IP address to be allocated according to the request sent by the UE 12, through the dynamic host configuration protocol DHCPv4 of the version 4, and/or through the IPv6 stateless address self-configuration mode.

 Preferably, the UE 12 includes:

 Requesting access to the local network unit 121, for transmitting the information of the local network that the UE 12 requests to access to the home base station 13, and transmitting, by the home base station 13, the radio bearer of the local network established by the UE 12 Enter the local network.

 The IP address type obtaining unit 122 is configured to receive an indication of the user mobility control management entity 11 and obtain a type of an Internet Protocol IP address allocated by the local network determined by the user mobility control management entity 11 for the UE 12.

 The IP address obtaining unit 123 is configured to acquire an IP address from the home base station 13.

 Preferably, the IP address obtaining unit 123, according to the type of the IP address allocated by the local network determined by the user mobility control management entity 11 for the UE 12, passes the dynamic host configuration protocol DHCPv4 of version 4, and/or This type of IP address is obtained from the home base station 13 by the IPv6 stateless address self-configuration method.

 In summary, the embodiment of the present invention determines, by the user mobility control management entity, the type of the IP address allocated by the local network to the user equipment UE, and instructs the UE to obtain the IP address of the type from the home base station in the IP address allocation manner defined by the IETF. The base station allocates an IP address message according to the request sent by the UE, and allocates an IP address to the UE, so that if the PDN GW or the GGSN in the core network is not adopted, for example, when the UE accesses the local network, the user moves. The Control Management Entity (MME or SGSN) may also implement an IP address assigned to the UE.

 It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for allocating an IP address of an Internet protocol, the method comprising: the user mobility control entity, according to the information of the local network that the user equipment UE requests to access, instructing the home base station to establish a local network wireless manner for the UE Carrying, accessing the UE to the local network; the user mobility control management entity determines the type of the IP address allocated by the local network for the UE, and instructs the UE to obtain the IP address of the type from the home base station;

 The home base station allocates an IP address according to the request sent by the UE, and allocates an IP address to the UE.

 The method according to claim 1, wherein the step of determining, by the user mobility control management entity, the type of the IP address allocated by the local network to the UE comprises:

 Determining, by the user mobility control management entity, the IP address assigned by the local network to the UE according to the configuration information of the UE, the type of the IP address that the UE requests to be allocated, the subscription data of the UE, and the type of the IP address supported by the local network. Types of.

 3. The method according to claim 2, wherein the type of the IP address supported by the local network is obtained by the user mobility control management entity from a home base station of the local network.

 The method according to claim 1, 2 or 3, wherein the user mobility control management entity is a mobility management entity MME;

 The step of instructing the UE to obtain an IP address from the home base station includes:

 The MME accepts the PDN Connectivity Accept message through the packet data network connection, or activates the default evolved packet system EPS bearer context request Activate Default EPS bearer context request message, or attach accepts the Attach Accept message to instruct the UE to obtain the IP address from the home base station.

The method according to claim 4, wherein the MME passes the PDN Connectivity Accept message or the Activate default EPS bearer context request message or the Attach Accept message, the packet data network type PDN Type and the packet data network address PDN. Address, indicating that the UE obtains an IP address from the home base station; When the MME determines that the IP address assigned by the local network to the UE is the version 4 Internet Protocol IPv4 address, the MME sets the PDN Type to IPv4, and sets the PDN Address to be zero; when the MME determines that the local network is allocated for the UE When the IP address is the Internet Protocol IPv6 address of the version 6, the MME sets the PDN Type to IPv6, and assigns the IPv6 interface identifier Interface Identity to the UE, and sets the IPv6 Interface Identity in the PDN Address; when the MME determines the local network. When the IP address assigned to the UE is the Internet Protocol IPv4v6 address of the version 4 and the version 6, the MME sets the PDN Type to IPv4v6, and sets the IPv4 address in the PDN Address to zero, and assigns the IPv6 Interface Identity to the UE. The Interface Identity is set in the IPv6 address of the PDN Address.

 The method according to claim 1, 2 or 3, wherein the user mobility control management entity is a serving general packet radio service support node SGSN;

 The step of instructing the UE to obtain an IP address from the home base station includes:

 The SGSN accepts the Activate PDP Context Accept message by activating the packet data protocol context, instructing the UE to obtain an IP address from the home base station.

 The method according to claim 6, wherein the SGSN instructs the UE to obtain an IP address from the home base station by using a packet data protocol type PDP Address Type and a packet data protocol address PDP Address in the Activate PDP Context Accept message. ; among them,

 When the SGSN determines that the IP address assigned by the local network to the UE is the Internet Protocol IPv4 address of the version 4, the SGSN sets the PDP Address Type to IPv4 and sets the PDP Address to zero;

 When the SGSN determines that the IP address assigned by the local network to the UE is the version 6 Internet Protocol IPv6 address, the SGSN sets the PDP Address Type to IPv6, and assigns the IPv6 interface identifier to the UE, and the IPv6 Interface Identity. Set in the PDP Address;

When the SGSN determines that the IP address assigned by the local network to the UE is the Internet Protocol IPv4v6 address of the version 4 and the version 6, the SGSN sets the PDP Address Type to IPv4v6, and sets the IPv4 address in the PDP Address to be zero, for the UE. Assign IPv6 Interface Identity, will The IPv6 Interface Identity is set in the IPv6 address of the PDP Address.

 The method according to claim 1, wherein the user mobility control management entity instructs the home base station to establish a wireless bearer of the local network for the UE according to the information of the local network that the UE requests to access. The steps for the UE to access the local network include:

 The mobility management entity MME obtains the information that the UE requests to access the local network through the UE-originated attachment process or the packet data network connection process, and according to the information that the UE requests to access the local network, instructs the home base station to establish a local network wireless for the UE. The bearer, the home base station establishes the radio bearer of the local network for the UE to access the local network according to the indication of the MME; or, the serving general packet radio service support node SGSN activates the packet data protocol context procedure by using the UE, Acquiring the information of the local network that the UE requests to access, the SGSN, according to the information of the local network that the UE requests to access, instructs the home base station to establish a radio bearer of the local network for the UE, and the home base station passes the UE according to the indication of the SGSN. Establish a radio bearer of the local network to access the UE to the local network.

 A device for controlling an IP address allocation of an Internet Protocol, the device comprising: an access local network indication unit, configured to indicate, according to information of a local network that the user equipment UE requests to access, to indicate that the home base station passes the UE Establish a radio bearer of the local network, and connect the UE to the local network;

 An IP address type determining unit, configured to determine a type of an IP address allocated by the local network to the UE, and an IP address obtaining indication unit, configured to instruct the UE to acquire, from the home base station, an IP address of the type determined by the IP address type determining unit for the UE .

 The device according to claim 9, wherein the IP address type determining unit, according to the configuration information of the user mobility control management entity, the type of the IP address supported by the local network, and the UE requesting the allocation The type of the IP address and the subscription data of the UE determine the type of the IP address assigned by the local network to the UE.

 The device according to claim 10, wherein the IP address type determining unit acquires a type of an IP address supported by the local network from the home base station.

12. Apparatus according to claim 9, 10 or 11 wherein the apparatus is mobile Sex management entity MME;

 The IP address acquisition indication unit accepts a PDN Connectivity Accept message by using a packet data network connection, or activates a default default EPS bearer context request message, or attaches an Accept Accept message to indicate that the UE is from the home base station. Get the IP address.

 The device according to claim 12, wherein the IP address acquisition indication unit, by a PDN Connectivity Accept message or an Activate default EPS bearer context request message or an Attach Accept message, a packet data network type PDN Type and The packet data network address PDN Address indicates that the UE obtains an IP address from the home base station; wherein, the Internet Protocol IPv4 address, the IP address acquisition indication unit sets the PDN Type to IPv4, and sets the PDN Address to be zero; the Internet Protocol IPv6 address The IP address acquisition indication unit sets the PDN Type to IPv6, and assigns an IPv6 interface identifier to the UE, and sets the IPv6 Interface Identity in the PDN Address.

 When the IP address type determining unit determines that the IP address assigned by the local network to the UE is the Internet Protocol IPv4v6 address of Release 4 and Version 6, the IP address acquisition indication unit sets the PDN Type to IPv4v6, and sets the IPv4 in the PDN Address. The address is zero, the IPv6 Interface Identity is assigned to the UE, and the IPv6 Interface Identity is set in the IPv6 address of the PDN Address.

 The apparatus according to claim 9, 10 or 11, wherein the apparatus is a serving general packet radio service support node SGSN;

 The IP address obtaining indication unit receives an Activate PDP Context Accept message by activating a packet data protocol context, and instructs the UE to acquire an IP address from the home base station.

The device according to claim 14, wherein the IP address acquisition indication unit passes the packet data protocol address type PDP in the Activate PDP Context Accept message. The address type and the packet data protocol address PDP Address, instructing the UE to obtain an IP address from the home base station;

 When the IP address type determining unit determines that the IP address assigned by the local network to the UE is the Internet Protocol IPv4 address of the version 4, the IP address acquisition instructing unit sets the PDP Address Type to IPv4, and sets the PDP Address to be zero; When the IPv6 address is configured, the IP address obtaining indication unit sets the PDP Address Type to IPv6, and assigns the IPv6 interface identifier Interface Identity to the UE, and sets the IPv6 Interface Identity in the PDP Address; and the version 6 Internet Protocol IPv4v6 address The IP address capture indication unit sets the PDP Address Type to IPv4v6, and sets the IPv4 address in the PDP Address to zero, assigns the IPv6 Interface Identity to the UE, and sets the IPv6 Interface Identity in the IPv6 address of the PDP Address.

 16. A home base station, wherein the home base station comprises:

 a bearer establishing unit, configured to establish, according to a user mobile control management entity, an indication that the user equipment UE establishes a bearer of the local network, and establish a wireless bearer of the local network for the UE;

 And a receiving requesting unit, configured to receive a message that is sent by the UE to request an Internet Protocol 地址>address; and an IP address allocating unit, configured to allocate an IP address according to the request sent by the UE, and allocate an IP address to the UE.

 The home base station according to claim 16, wherein the IP address allocation unit allocates an IP address message according to a request sent by the UE, passes the dynamic host configuration protocol DHCPv4 of version 4, and/or does not pass IPv6. The status address is self-configured and the IP address is assigned to the UE.

 18. A communication system, the system comprising:

The user mobility control management entity is configured to: according to the information of the local network that the user equipment UE requests to access, instruct the home base station to establish the wireless bearer of the local network for the UE, and connect the UE to the local network; Type of Internet Protocol IP address and indicates the UE Obtaining an IP address of this type from the home base station;

 The home base station is configured to establish, according to the user mobility control management entity, an indication of establishing a bearer of the local network for the UE, establish a wireless bearer of the local network for the UE, and allocate an IP address message according to the request sent by the UE, Assign an IP address to the UE,

 A user equipment, where the user equipment includes:

 And requesting to access the local network unit, where the information about the local network that the user equipment requests to access is sent to the home base station, and the local base station establishes a wireless bearer for the local network established by the user equipment, and accesses the local network. The internet;

 An IP address type obtaining unit, configured to receive an indication of a user mobility control management entity, and obtain, from the medium network type, an IP address type assigned by the local network determined by the user mobility control management entity to the user equipment;

 The IP address obtaining unit is configured to acquire the IP address of the type from the home base station.

 The user equipment according to claim 19, wherein the Π>address obtaining unit is configured according to the type of the IP address allocated by the local network determined by the user mobility control management entity for the user equipment, The dynamic host configuration protocol DHCPv4 of 4, and/or obtains the IP address of the type from the home base station through the IPv6 stateless address self-configuration mode.

 An Internet Protocol IP address allocation method, the method comprising: the user mobility control management entity instructs the home base station to establish a wireless network of the local network by using the information of the local network that the user equipment UE requests to access. The UE is connected to the local network; the user mobility control management entity determines the type of the IP address allocated by the local network for the UE, and instructs the UE to obtain the IP address of the type from the home base station, and indicates that the home base station is configured according to the UE. The sent request allocates an IP address message to assign an IP address to the UE.

 The method according to claim 21, wherein the step of determining, by the user mobility control management entity, the type of the IP address allocated by the local network to the UE comprises:

The user mobility control management entity determines the IP allocated by the local network to the UE according to the configuration information of the UE, the type of the IP address that the UE requests to be allocated, the subscription data of the UE, and the type of the IP address supported by the local network. The type of address.

The method according to claim 22, wherein the type of the IP address supported by the local network is obtained by the user mobility control management entity from a home base station of the local network.

 The method according to claim 21, 22 or 23, wherein the user mobility control management entity is a mobility management entity MME;

 The step of instructing the UE to obtain an IP address from the home base station includes:

 The MME accepts the PDN Connectivity Accept message through the packet data network connection, or activates the default evolved packet system EPS bearer context request Activate Default EPS bearer context request message, or attach accepts the Attach Accept message to instruct the UE to obtain the IP address from the home base station.

 The method according to claim 24, wherein the MME passes the PDN Connectivity Accept message or the Activate default EPS bearer context request message or the Attach Accept message, the packet data network type PDN Type and the packet data network address PDN. Address, indicating that the UE obtains an IP address from the home base station;

 When the MME determines that the IP address assigned by the local network to the UE is the version 4 Internet Protocol IPv4 address, the MME sets the PDN Type to IPv4, and sets the PDN Address to be zero; when the MME determines that the local network is allocated for the UE When the IP address is the Internet Protocol IPv6 address of the version 6, the MME sets the PDN Type to IPv6, and assigns the IPv6 interface identifier Interface Identity to the UE, and sets the IPv6 Interface Identity in the PDN Address; when the MME determines the local network. When the IP address assigned to the UE is the Internet Protocol IPv4v6 address of the version 4 and the version 6, the MME sets the PDN Type to IPv4v6, and sets the IPv4 address in the PDN Address to zero, and assigns the IPv6 Interface Identity to the UE. The Interface Identity is set in the IPv6 address of the PDN Address.

 The method according to claim 21, 22 or 23, wherein the user mobility control management entity is a serving general packet radio service support node SGSN;

 The step of instructing the UE to obtain an IP address from the home base station includes:

The SGSN accepts the Activate PDP Context Accept by activating the packet data protocol context. Info, instructing the UE to obtain an IP address from the home base station.

 The method according to claim 26, wherein the SGSN instructs the UE to obtain an IP address from the home base station by using a packet data protocol address type PDP Address Type and a packet data protocol address PDP Address in the Activate PDP Context Accept message. ; among them,

 When the SGSN determines that the IP address assigned by the local network to the UE is the Internet Protocol IPv4 address of the version 4, the SGSN sets the PDP Address Type to IPv4 and sets the PDP Address to zero;

 When the SGSN determines that the IP address assigned by the local network to the UE is the version 6 Internet Protocol IPv6 address, the SGSN sets the PDP Address Type to IPv6, and assigns the IPv6 interface identifier Interface Identity to the UE, and sets the IPv6 Interface Identity. In the PDP Address;

 When the SGSN determines that the IP address assigned by the local network to the UE is the Internet Protocol IPv4v6 address of the version 4 and the version 6, the SGSN sets the PDP Address Type to IPv4v6, and sets the IPv4 address in the PDP Address to be zero, for the UE. Assign IPv6 Interface Identity and set the IPv6 Interface Identity to the IPv6 address of the PDP Address.

 The method according to claim 21, wherein the user mobility control management entity instructs the home base station to establish a wireless bearer of the local network for the UE according to the information of the local network that the UE requests to access, The steps for the UE to access the local network include:

 The mobility management entity MME obtains the information that the UE requests to access the local network through the UE-originated attachment process or the packet data network connection process, and according to the information that the UE requests to access the local network, instructs the home base station to establish a local network wireless for the UE. According to the indication of the MME, the home base station establishes the wireless bearer of the local network for the UE to implement access to the local network; or, the serving general packet radio service support node SGSN activates the packet data protocol context by using the UE. The process, the information about the local network that the UE requests to access is obtained, and the SGSN, according to the information of the local network that the UE requests to access, instructs the home base station to establish a radio bearer of the local network for the UE, and the home base station passes the indication according to the SGSN. The UE establishes a wireless bearer of the local network, and implements accessing the UE to the local network.