CN102883310B

CN102883310B - Remote access method in long-term evolving network and equipment

Info

Publication number: CN102883310B
Application number: CN201210350511.7A
Authority: CN
Inventors: 肖扬
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-09-19
Filing date: 2012-09-19
Publication date: 2015-08-19
Anticipated expiration: 2032-09-19
Also published as: CN102883310A

Abstract

The embodiment of the invention discloses the remote access method in a kind of Long Term Evolution LTE network and equipment, relate to wireless communication field, for solving how to realize remote access problem in the lte networks.First terminal sends the first dedicated bearer to network side and sets up request message, and network side sets up the first dedicated bearer between first terminal; Second terminal sends the second dedicated bearer to network side and sets up request message, network side sets up the second dedicated bearer between the second terminal, and under the address information of the second terminal, the first routing iinformation that the next-hop address information of this micronet is the address information of first terminal gone in record; Second terminal sends access request message by the second dedicated bearer to network side, and access request message is transmitted to first terminal by the first dedicated bearer according to the first routing iinformation by network side, and this access request message is transmitted to micronet by first terminal.Visible, present invention achieves the remote access scheme in LTE network.

Description

Remote access method in long-term evolving network and equipment

Technical field

The present invention relates to wireless communication field, particularly relate to the remote access method in a kind of long-term evolving network and equipment.

Background technology

The very important demand Internet era that remote access service being, the VPN (virtual private network) technology (Virtual Private Network, VPN) such as setting up dedicated network in common network is just widely used.

Long Term Evolution (Long Term Evolution, LTE) network is compared conventional art and is provided the shorter time delay of higher bandwidth sum, and this point is introduce Internet service and new business innovation in the mobile communication network, both provides very solid technical foundation.Very typical scene is, LTE user can pass through the WiFi access point function that LTE terminal (User Equipment, UE) provides, and the high speed bandwidth of LTE network is shared to group or one group of equipment of surrounding.Very naturally, user is sometimes that hope can this LTE terminal of remote access WiFi micronet behind.But technical scheme unripe at present can meet this demand simply.

VPN technologies in conventional internet meaning, cannot directly indiscriminately imitate in LTE network.Reason is this little miniature business demand of LTE user, can not as the public internet VPN infrastructure network that spend huge expense go construction one huge the same as enterprise network, otherwise just will lose more than gain concerning seeing at economic angle a domestic consumer, even share the vpn server expense of a near-end, also will greatly suppress and hinder the popularization of this business.

In order to meet the demand of this service better, the realization of remote technology needs more to simplify in the lte networks, need to utilize the existing network architecture and various resource better, more control and management function is realized at network side, only leave minimum necessary function and realize in UE side.

Summary of the invention

The embodiment of the present invention provides remote access method in a kind of long-term evolving network and equipment, for solving how to realize remote access problem in the lte networks.

A remote access method in Long Term Evolution LTE network, the method comprises:

First terminal sends the first dedicated bearer to network side and sets up request message;

First terminal receives the access request message from the second terminal that network side forwards, and this access request message is that network side is transmitted to first terminal by the first dedicated bearer between first terminal; The destination address carried in this access request message is the address information of the micronet that first terminal is supported;

Described access request message is transmitted to the equipment in described micronet by first terminal.

Second terminal sends the second dedicated bearer to network side and sets up request message, and the second dedicated bearer sets up in request message the next-hop address information carrying and go to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal;

The second dedicated bearer between that second terminal is set up by network side and the second terminal sends access request message to network side, and the destination address carried in this access request message is the address information of described micronet.

The first dedicated bearer that A, network side receive first terminal transmission sets up request message; The first dedicated bearer between request message foundation with first terminal is set up according to the first dedicated bearer;

The second dedicated bearer that B, network side receive the second terminal transmission sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to described micronet, and this next-hop address information is the address information of first terminal; Set up the second dedicated bearer between request message foundation with the second terminal according to the second dedicated bearer, and the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record under the address information of the second terminal;

C, network side receive the access request message that the second terminal is sent by the second dedicated bearer, and the destination address carried in this access request message is the address information of described micronet; According to the first routing iinformation, described access request message is transmitted to first terminal by the first dedicated bearer.

A kind of terminal, this terminal comprises:

Transmitting element, sets up request message for sending the first dedicated bearer to network side;

Receiving element, for receiving the access request message from the second terminal that network side forwards, this access request message is that network side is transmitted to this terminal by the first dedicated bearer between this terminal; The destination address carried in this access request message is the address information of the micronet that this terminal is supported, the second terminal is the terminal with this terminal with binding relationship;

Retransmission unit, for being transmitted to the equipment in described micronet by described access request message.

A kind of terminal, this terminal comprises:

First transmitting element, request message is set up for sending the second dedicated bearer to network side, second dedicated bearer sets up in request message the next-hop address information carrying and go to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal; First terminal is the terminal with this terminal with binding relationship;

Second transmitting element, for set up by network side and the second dedicated bearer between this terminal send access request message to network side, the destination address carried in this access request message is the address information of described micronet.

A kind of packet data gateway, this packet data gateway comprises:

First sets up unit, and the first dedicated bearer sent for receiving first terminal sets up request message; The first dedicated bearer between request message foundation with first terminal is set up according to the first dedicated bearer;

Second sets up unit, and the second dedicated bearer sent for receiving the second terminal sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to described micronet, and this next-hop address information is the address information of first terminal; Set up the second dedicated bearer between request message foundation with the second terminal according to the second dedicated bearer, and the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record under the address information of the second terminal;

First retransmission unit, for receiving the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of described micronet; According to the first routing iinformation, described access request message is transmitted to first terminal by the first dedicated bearer.

A kind of packet data gateway, this packet data gateway comprises:

Set up unit, the first dedicated bearer sent for receiving first terminal sets up request message; The first dedicated bearer between request message foundation with first terminal is set up according to the first dedicated bearer;

First retransmission unit, the access request message from the second terminal that the PGW for receiving in the second terminal place EPC forwards, the destination address carried in this access request message is the address information of the micronet that first terminal is supported; Described access request message is transmitted to first terminal by the first dedicated bearer.

A kind of packet data gateway, this packet data gateway comprises:

Set up unit, the second dedicated bearer sent for receiving the second terminal sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to described micronet, and this next-hop address information is the address information of first terminal; The second dedicated bearer between request message foundation with the second terminal is set up according to the second dedicated bearer; Under the address information of the second terminal, the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record; And set up the GPRS Tunnel Protocol GTP tunnel of the SGi interface between the PGW in the EPC of first terminal place;

First retransmission unit, for receiving the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of described micronet; According to the first routing iinformation described access request message sent to the PGW in the EPC of first terminal place by described GTP tunnel.

In this programme, support that the first terminal of micronet sends the first dedicated bearer to network side and sets up request message, network side sets up the first dedicated bearer between first terminal; Second terminal sends the second dedicated bearer to network side and sets up request message, second dedicated bearer sets up in request message the next-hop address information carrying and go to this micronet, this next-hop address information is the address information of first terminal, network side sets up the second dedicated bearer between the second terminal, and the first routing iinformation that the next-hop address information of this micronet is the address information of first terminal gone in record under the address information of the second terminal; Second terminal sends access request message by the second dedicated bearer to network side, the destination address carried in this access request message is the address information of this micronet, access request message is transmitted to first terminal by the first dedicated bearer according to the first routing iinformation by network side, and this access request message is transmitted to the equipment in micronet by first terminal.Visible, present invention achieves the scheme of the micronet that the second terminal access first terminal is supported, namely achieve the remote access scheme in LTE network.

Accompanying drawing explanation

Fig. 1 a is the schematic network structure in the embodiment of the present invention;

The method flow schematic diagram that Fig. 1 b provides for the embodiment of the present invention;

The other method schematic flow sheet that Fig. 2 provides for the embodiment of the present invention;

The another method flow schematic diagram that Fig. 3 provides for the embodiment of the present invention;

Fig. 4 a is that the PF in the embodiment of the present invention defines schematic diagram;

Fig. 4 b is that the GTP tunnel in the embodiment of the present invention sets up schematic diagram;

The terminal structure schematic diagram that Fig. 5 provides for the embodiment of the present invention;

Another terminal structure schematic diagram that Fig. 6 provides for the embodiment of the present invention;

A kind of PGW structural representation that Fig. 7 provides for the embodiment of the present invention;

The another kind of PGW structural representation that Fig. 8 provides for the embodiment of the present invention;

Another PGW structural representation that Fig. 9 provides for the embodiment of the present invention.

Embodiment

The object of the present invention is to provide a kind of method, make to provide a kind of remote access service to become possibility in LTE network inside.Namely by LTE network, a microLAN network of some terminals expansion behind can arbitrarily be accessed.

As shown in Figure 1a, UE2(second terminal) access UE1(first terminal) method of micronet (WIFI) supported is: UE1 sends the first dedicated bearer to network side and sets up request message, and network side sets up the first dedicated bearer between UE1; UE2 sends the second dedicated bearer to network side and sets up request message, second dedicated bearer sets up in request message the next-hop address information carrying and go to this micronet, this next-hop address information is the address information of UE1, network side sets up the second dedicated bearer between UE2, and the first routing iinformation that the next-hop address information of this micronet is the address information of UE1 gone in record under the address information of UE1; UE2 sends access request message by the second dedicated bearer to network side, the destination address carried in this access request message is the address information of this micronet, access request message is transmitted to UE1 by the first dedicated bearer according to the first routing iinformation by network side, and this access request message is transmitted to the equipment (such as device A, B, C etc.) in micronet by UE1.

Below from first terminal side, the enforcement of the second end side, network side is described respectively.

See Fig. 1 b, the remote access method in the LTE network that the embodiment of the present invention provides for first terminal, comprises the following steps:

Step 10: first terminal sends the first dedicated bearer to network side and sets up request message;

Step 11: first terminal receives the access request message from the second terminal that network side forwards, and this access request message is that network side is transmitted to first terminal by the first dedicated bearer between first terminal; The destination address carried in this access request message is the address information of the micronet that first terminal is supported, comprises IP address and mask information;

Here, the second terminal can be the terminal with first terminal with binding relationship; The binding relationship of first terminal and the second terminal sets as follows: user is after " remote service business " is opened in business hall, business hall is equipped with two or more international mobile subscriber identification code (IMSI) (universal subscriber identity module (USIM) card) for this user, use the terminal of one of them IMSI number (usim card) to be first terminal, use the terminal of other IMSI number (usim card) to be the second terminal; This service is opened in business hall simultaneously in BOSS system, and arranges the binding relationship of first terminal and the second terminal simultaneously.

Step 12: this access request message is transmitted to the equipment in this micronet by first terminal.

Preferably, the first dedicated bearer sets up in request message the address information can carrying the micronet that first terminal is supported, can know that first terminal supports the address information of the micronet of micronet and support to make side, networking.Concrete, the address information of carrying the micronet that first terminal is supported in the local address of packet filter (PF) information in request message and subnet mask (Local Address and Subnet Mask) field can be set up at the first dedicated bearer.

Preferably, before first terminal to send to network side after the first dedicated bearer sets up request message and receives the access request message that network side forwards, receive the dedicated bearer amendment order that network side sends, according to this dedicated bearer amendment order, the first dedicated bearer of record is set up the remote address of the PF information in request message and the content modification of subnet mask (Remote Address and Subnet Mask) field is the address information of the second terminal, and according to amended information control only on the first dedicated bearer transmission mail to the message of the second terminal.Because in the prior art, the content of RemoteAddress and Subnet Mask field determines the message transmitting which terminal on the dedicated bearer set up, therefore, here be after the address information of the second terminal by the content modification of Remote Addressand Subnet Mask field, first terminal only can transmit according to the content of Remote Address and Subnet Mask field the message mailing to the second terminal on the first dedicated bearer.

Further, after at first terminal access request message being transmitted to the equipment in micronet, first terminal receives the response message that the equipment in micronet returns, and the destination address in this response message is the address information of the second terminal; First terminal sends this response message by the first dedicated bearer to network side.

See Fig. 2, the remote access method provided in a kind of LTE network that the embodiment of the present invention provides for the second terminal, comprises the following steps:

Step 20: the second terminal sends the second dedicated bearer to network side and sets up request message, second dedicated bearer sets up in request message the next-hop address information carrying and go to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal; First terminal can be the terminal with the second terminal with binding relationship;

Step 21: the second dedicated bearer between that the second terminal is set up by network side and the second terminal sends access request message to network side, the destination address carried in this access request message is the address information of the micronet that first terminal is supported.

Concrete, can set up in down hop (NextHop) field of the PF information in request message at the second dedicated bearer the next-hop address information carrying and go to the micronet that first terminal is supported.

Preferably, in the remote address and subnet mask field of PF information, carry the address information of the micronet that first terminal is supported.Because in the prior art, the content of Remote Address and Subnet Mask field determines the message transmitting which terminal on the dedicated bearer set up, therefore, here be the address information of the micronet that first terminal is supported by the curriculum offering of RemoteAddress and Subnet Mask field, can make the second terminal on the second dedicated bearer, only transmit the message mailing to the micronet that first terminal is supported according to the content of Remote Address and Subnet Mask field, and make network side on the second dedicated bearer, only transmit the message of the micronet supported from first terminal according to the content of Remote Address and Subnet Mask field.

Preferably, to send before the second dedicated bearer sets up request message to network side in the second terminal, second terminal can receive the address information of the micronet of the identification information of first terminal, the address information of first terminal and the first terminal support that network side sends, and can send the second dedicated bearer set up request message to make the second terminal according to these information received to network side.Here, network side can by the signaling of LTE network, or the higher layer applications business of note and so on sends the address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal are supported to the second terminal.

Further, send after access request message to network side in the second terminal, the second terminal receives the response message from first terminal that network side is forwarded by the second dedicated bearer, and the destination address in this response message is the address information of the second terminal.

See Fig. 3, the remote access method in the LTE network that the embodiment of the present invention provides for network side, comprises the following steps:

Step 30: the first dedicated bearer that network side receives first terminal transmission sets up request message; The first dedicated bearer between request message foundation with first terminal is set up according to the first dedicated bearer;

Step 31: the second dedicated bearer that network side receives the second terminal transmission sets up request message, second dedicated bearer sets up in request message the next-hop address information being carried to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal, and first terminal can be the terminal with the second terminal with binding relationship; Set up the second dedicated bearer between request message foundation with the second terminal according to the second dedicated bearer, and the first routing iinformation that the next-hop address information of this micronet is the address information of first terminal gone in record under the address information of the second terminal;

Step 32: network side receives the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of this micronet; According to the first routing iinformation, this access request message is transmitted to first terminal by the first dedicated bearer.

Concrete, when first terminal and the second terminal are positioned at same EPC, the executive agent of step 30, step 31 and step 32 is the PGW in first terminal and the second terminal place EPC; Or,

When first terminal is positioned at different EPC from the second terminal, the executive agent of step 30 is the PGW in the EPC of first terminal place; The executive agent of step 31 is the PGW in the second terminal place EPC, and the PGW in step 31 in second terminal place EPC, receiving after the second dedicated bearer sets up request message, also sets up GPRS Tunnel Protocol (GTP) tunnel of the SGi interface between the PGW in the EPC of first terminal place; The specific implementation of step 32 comprises: the PGW in the second terminal place EPC receives the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of this micronet, according to the first routing iinformation, this access request message is sent to PGW in the EPC of first terminal place by the GTP tunnel set up, this access request message is transmitted to first terminal by the first dedicated bearer by the PGW in the EPC of first terminal place.

Preferably, in steps A, network side is after the first dedicated bearer receiving first terminal transmission sets up request message, when the first dedicated bearer sets up in request message the address information of carrying the micronet that first terminal is supported, the PGW in the EPC of first terminal place records the secondary route information comprising the address information of this micronet under the address information of first terminal; Accordingly, before access request message is transmitted to first terminal by the first dedicated bearer by the PGW in step 32 in the EPC of first terminal place, need the destination address determining whether to comprise in secondary route information in this access request message, if, then this access request message is transmitted to first terminal by the first dedicated bearer, otherwise, abandon this access request message.

Preferably, when first terminal and the second terminal are positioned at same EPC, after this access request message is transmitted to first terminal by the first dedicated bearer by the PGW in first terminal and the second terminal place EPC, PGW in first terminal and the second terminal place EPC receives the response message that first terminal is sent by the first dedicated bearer, and the destination address in this response message is the address information of the second terminal; By the second carrying, this response message is sent to the second terminal.

When first terminal is positioned at different EPC from the second terminal, after this access request message is transmitted to first terminal by the first dedicated bearer by the PGW in the EPC of first terminal place, PGW in the EPC of first terminal place receives the response message that first terminal is sent by the first dedicated bearer, and the destination address in this response message is the address information of the second terminal; By the GTP tunnel set up this response message sent to the PGW in the second terminal place EPC, this response message is sent to the second terminal by the second carrying by the PGW in the second terminal place EPC.

Preferably, when first terminal and the second terminal are positioned at same EPC, PGW in first terminal and the second terminal place EPC receive second terminal send the second dedicated bearer set up request message after, the content modification of remote address and subnet mask field that the first dedicated bearer of record is set up the PF information in request message by the PGW in first terminal and the second terminal place EPC is the address information of the second terminal, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And, PGW in first terminal and the second terminal place EPC sends dedicated bearer amendment order to first terminal, and the content modification of the remote address and subnet mask field of the first dedicated bearer of record being set up the PF information in request message to indicate first terminal is the address information of the second terminal.

When first terminal is positioned at different EPC from the second terminal, PGW in the second terminal place EPC receive second terminal send the second dedicated bearer set up request message after, the address information of the second terminal is sent to the PGW in the EPC of first terminal place by the PGW in the second terminal place EPC by the GTP tunnel set up, first dedicated bearer of record is set up the address information that point remote address of PF information in request message and the content modification of subnet mask field are the second terminal by the PGW in the EPC of first terminal place, to control the message only transmitting the second terminal transmission on the first dedicated bearer according to amended information, and, PGW in the EPC of first terminal place sends dedicated bearer amendment order to first terminal, and the content modification of the remote address and subnet mask field of the first dedicated bearer of record being set up the PF information in request message to indicate first terminal is the address information of the second terminal.

Preferably, receive before the second dedicated bearer that the second terminal sends sets up request message at network side, by the address information of micronet that the identification information of first terminal, the address information of first terminal and first terminal are supported, send to the second terminal.

Below in conjunction with specific embodiment, the present invention will be described:

Embodiment one:

User, in operator place signing " remote service business ", has opened two usim cards, has been placed on respectively in terminal UE 1 and UE2 and uses.Wherein, UE1 uses (such as family or office) in fixed location, needs to support that WiFi network is shared and direct routing from wireless network to private net address.Support WiFi network is shared, and this is a basic function of UE, and the intelligent terminal of current main flow and cpe device can be supported well.And the direct routing from wireless network to private net address, this expansion is the prerequisite that terminal can support remote service, requires Terminal Design development support simple gateway function exactly.Another terminal UE 2 can be a real mobile subscriber, can move everywhere.Suppose in the present embodiment that UE1 and UE2 is positioned at same EPC.

Step one: UE 1 sends dedicated bearer to network side and sets up request message (Bearer ResourceAllocation Request), wherein carries the address information of the micronet that UE 1 supports; Concrete:

After UE 1 starts shooting, send dedicated bearer to network side and set up request message, the PF information of wherein carrying can be used to refer to network, and whether this UE supports remote service.Concrete way is, outside the original field of PF information, increases a field, i.e. Local Address and Subnet Mask(local address and subnet mask in the protocol) field, as shown in fig. 4 a.When the PF packets of information that the dedicated bearer that UE1 sends is set up in request message contains this field, namely mean that this UE1 of informing network side supports the micronet of a similar WiFi, and specify IP address and the mask information of this micronet.

The dedicated bearer that step 2: PGW receives UE1 transmission sets up request message, sets up the dedicated bearer between request message foundation with UE1 according to this dedicated bearer; And record comprises the routing iinformation of the address information of micronet; Specific as follows:

The dedicated bearer that UE1 sends is set up request message and is delivered to PGW via base station, PGW sets up the dedicated bearer between UE1, and add a routing iinformation, namely below the IP address of UE1, a routing iinformation is increased, such as below the IP address 172.16.13.121/24 of UE1, increase the routing iinformation that is gone to micronet 192.168.0.x/24.

Step 3: UE2 sends dedicated bearer to network side and sets up request message, wherein carry the next-hop address information going to the micronet that UE1 supports, this next-hop address information is the address information of UE1, and this dedicated bearer sets up in request message the address information of also carrying the micronet that UE1 supports; Specific as follows:

After UE2 start, the remote service information of the UE1 that UE2 associates by network side, sends to UE2 by certain mode.This advice method, it can be the signaling of LTE network, also can be the higher layer applications business of note and so on, any restriction specifically can not be done, but its remote service information transmitted, at least needs to comprise the mark (such as MSISDN phone number) of UE1, the IP network section of micronet that the IP address of UE1, UE1 support and mask information.

UE2, according to the information received, sends dedicated bearer to network side and sets up request message, the wherein Remote Address and Subnet Mask field of PF information, extends this as IP address and the mask of the micronet that UE1 supports., also require outside original field of PF information here, expand a new field, i.e. Next Hop field, this field type is an IP address, and as shown in fig. 4 a, now the value of this field is the IP address of UE1.

The dedicated bearer that step 4: PGW receives UE2 transmission sets up request message, set up the dedicated bearer between request message foundation with UE2 according to this dedicated bearer, and the routing iinformation that the next-hop address information of the micronet that UE1 supports is the address information of UE1 gone in record under the address information of UE2; Specific as follows:

The dedicated bearer that UE2 sends is set up after request message is delivered to PGW via base station, and PGW sets up request message according to this dedicated bearer and sets up dedicated bearer between UE2.Simultaneously, do two pieces thing: first is the remote address of PF information in the dedicated bearer message sent by the UE1 of record and the content modification of subnet mask field is the address information of UE2, and issue dedicated bearer amendment order to notify that the dedicated bearer of record to be set up the address information that the remote address of the PF information in request message and the content modification of subnet mask field are UE2 by UE1 to UE1; Mutual by this, the correct configuration of the PF that the dedicated bearer completing two UE is correlated with; Second is in the contextual information of the UE2 safeguarded, below the IP address of UE2, increase a routing iinformation, and the next hop address that micronet 192.168.0.x/24 is gone in the instruction of this routing iinformation is the IP address of UE1.

So far, whole configuration efforts of the remote access service below same EPC can just be completed.

Step 5: UE2 sends access request message by the dedicated bearer between PGW to PGW, and the destination address carried in this access request message is the address information of the micronet that UE1 supports;

After PGW receives the access request message that UE2 sends, be UE1 according to the routing iinformation determination down hop recorded in step 4 and after the routing iinformation recorded in step 2 comprises the destination address in access request message, access request message sent to UE1;

Access request message is sent to the equipment in micronet by UE1.

UE1 receives the response message that the equipment in micronet returns, and the destination address in this response message is the address information of UE2; This response message is sent to PGW by the dedicated bearer between PGW by UE1, and this response message is sent to UE2 by PGW.

Embodiment two:

User, in operator place signing " remote service business ", has opened two usim cards, has been placed on respectively in terminal UE 1 and UE2 and uses.Wherein, UE1 uses (such as family or office) in fixed location, needs to support that WiFi network is shared and direct routing from wireless network to private net address.Support WiFi network is shared, and this is a basic function of UE, and the intelligent terminal of current main flow and cpe device can be supported well.And the direct routing from wireless network to private net address, this expansion is the prerequisite that terminal can support remote service, requires Terminal Design development support simple gateway function exactly.Another terminal UE 2 can be a real mobile subscriber, can move everywhere.Suppose in the present embodiment that UE1 and UE2 is positioned at different EPC.

Step 2: the PGW1 of UE1 place EPC receives the dedicated bearer that UE1 sends and sets up request message, sets up request message according to this dedicated bearer and sets up dedicated bearer between UE1; And record comprises the routing iinformation of the address information of micronet; Specific as follows:

The dedicated bearer that UE1 sends is set up request message and is delivered to PGW1 via base station, PGW1 sets up the dedicated bearer between UE1, and add a routing iinformation, namely below the IP address of UE1, a routing iinformation is increased, such as below the IP address 172.16.13.121/24 of UE1, increase the routing iinformation that is gone to micronet 192.168.0.x/24.

Step 4: the PGW2 of UE2 place EPC receives the dedicated bearer that UE2 sends and sets up request message, the dedicated bearer between request message foundation with UE2 is set up according to this dedicated bearer, under the address information of UE2, the routing iinformation that the next-hop address information of the micronet that UE1 supports is the address information of UE1 gone in record, and set up the GTP tunnel of the SGi interface between PGW1, as shown in Figure 4 b; Specific as follows:

The dedicated bearer that UE2 sends is set up after request message is delivered to PGW2 via base station, and PGW2 sets up request message according to this dedicated bearer and sets up dedicated bearer between UE2.Simultaneously, do two pieces thing: first is that the address information of UE2 is sent to PGW1 by GTP tunnel, the remote address of PF information in the dedicated bearer message that the UE1 of record sends by PGW1 and the content modification of subnet mask field are the address information of UE2, and issue dedicated bearer amendment order to notify that the dedicated bearer of record to be set up the address information that the remote address of the PF information in request message and the content modification of subnet mask field are UE2 by UE1 to UE1; Mutual by this, the correct configuration of the PF that the dedicated bearer completing two UE is correlated with; Second is in the contextual information of the UE2 safeguarded, below the IP address of UE2, increase a routing iinformation, and the next hop address that micronet 192.168.0.x/24 is gone in the instruction of this routing iinformation is the IP address of UE1.

So far, whole configuration efforts of the remote access service below different EPC can just be completed.

Step 5: UE2 sends access request message by the dedicated bearer between PGW2 to PGW2, and the destination address carried in this access request message is the address information of the micronet that UE1 supports;

Access request message after being UE1 according to the routing iinformation determination down hop recorded in step 4, is sent to PGW1 by GTP tunnel after receiving the access request message that UE2 sends by PGW2;

After the routing iinformation of record comprises the destination address in access request message in PGW1 determining step two, access request message is sent to UE1;

Access request message is sent to the equipment in micronet by UE1.

UE1 receives the response message that the equipment in micronet returns, and the destination address in this response message is the address information of UE2; This response message is sent to PGW1 by the dedicated bearer between PGW1 by UE1;

This response message is sent to PGW2 by GTP tunnel by PGW1;

The response message received is sent to UE2 by PGW2.

See Fig. 5, the embodiment of the present invention provides a kind of terminal, and this terminal comprises:

Transmitting element 50, sets up request message for sending the first dedicated bearer to network side;

Receiving element 51, for receiving the access request message from the second terminal that network side forwards, this access request message is that network side is transmitted to this terminal by the first dedicated bearer between this terminal; The destination address carried in this access request message is the address information of the micronet that this terminal is supported, the second terminal is the terminal with this terminal with binding relationship;

Retransmission unit 52, for being transmitted to the equipment in described micronet by described access request message.

Further, the first dedicated bearer sets up in request message the address information of carrying the micronet that this terminal is supported.

Further, the address information of carrying the micronet that this terminal is supported in the local address of the packet filter PF information in request message and subnet mask field is set up at the first dedicated bearer.

Further, this terminal also comprises:

Amendment unit 53, for to send to network side after the first dedicated bearer sets up request message and before receiving the described access request message that network side forwards, receive the dedicated bearer amendment order that network side sends, be the address information of the second terminal by the remote address of described PF information of record and the content modification of subnet mask field according to this dedicated bearer amendment order, and control according to amended information on the first dedicated bearer, only transmit the message mailing to the second terminal.

Further, described receiving element 51 also for:

After described access request message is transmitted to the equipment in described micronet, receive the response message that the equipment in described micronet returns, the destination address in this response message is the address information of the second terminal;

Described transmitting element 50 also for:

Described response message is sent to network side by the first dedicated bearer.

See Fig. 6, the embodiment of the present invention provides a kind of terminal, and this terminal comprises:

First transmitting element 60, request message is set up for sending the second dedicated bearer to network side, second dedicated bearer sets up in request message the next-hop address information carrying and go to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal; First terminal is the terminal with this terminal with binding relationship;

Second transmitting element 61, for set up by network side and the second dedicated bearer between this terminal send access request message to network side, the destination address carried in this access request message is the address information of described micronet.

Further, set up at the second dedicated bearer in the down hop field of the packet filter PF information in request message and carry described next-hop address information.

Further, in the remote address and subnet mask field of described PF information, carry the address information of described micronet.

Further, this terminal also comprises:

First receiving element 62, for sending before the second dedicated bearer sets up request message to network side, is receiving the address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal that network side sends are supported.

Further, this terminal also comprises:

Second receiving element 63, for after sending access request message to network side, receive the response message from first terminal that network side is forwarded by the second dedicated bearer, the destination address in this response message is the address information of this terminal.

See Fig. 7, the embodiment of the present invention provides a kind of packet data gateway, and this packet data gateway comprises:

First sets up unit 70, and the first dedicated bearer sent for receiving first terminal sets up request message; The first dedicated bearer between request message foundation with first terminal is set up according to the first dedicated bearer;

Second sets up unit 71, the second dedicated bearer sent for receiving the second terminal sets up request message, second dedicated bearer sets up in request message the next-hop address information being carried to described micronet, and this next-hop address information is the address information of first terminal; Set up the second dedicated bearer between request message foundation with the second terminal according to the second dedicated bearer, and the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record under the address information of the second terminal;

First retransmission unit 72, for receiving the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of described micronet; According to the first routing iinformation, described access request message is transmitted to first terminal by the first dedicated bearer.

Further, described first set up unit 70 also for:

After the first dedicated bearer receiving first terminal transmission sets up request message, when the first dedicated bearer sets up in request message the address information of carrying the micronet that first terminal is supported, under the address information of first terminal, record comprises the secondary route information of the address information of described micronet;

Described first retransmission unit 72 for:

After determining to comprise the destination address in described access request message in secondary route information, described access request message is transmitted to first terminal by the first dedicated bearer.

Further, this packet data gateway also comprises:

Second retransmission unit 73, for after described access request message is transmitted to first terminal by the first dedicated bearer, receive the response message that first terminal is sent by the first dedicated bearer, the destination address in this response message is the address information of the second terminal; By the second carrying, this response message is transmitted to the second terminal.

Further, this packet data gateway also comprises:

Amendment unit 74, after the second dedicated bearer for sending in reception second terminal sets up request message, first dedicated bearer of record is set up the address information that the remote address of packet filter PF information in request message and the content modification of subnet mask field are the second terminal, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And,

Send dedicated bearer amendment order to first terminal, the content modification of the remote address and subnet mask field of the first dedicated bearer of record being set up the PF information in request message to indicate first terminal is the address information of the second terminal.

Further, this packet data gateway also comprises:

Transmitting element 75, before the second dedicated bearer for sending in reception second terminal sets up request message, by the address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal are supported, sends to the second terminal.

See Fig. 8, the embodiment of the present invention provides a kind of packet data gateway, and this packet data gateway comprises:

Set up unit 80, the first dedicated bearer sent for receiving first terminal sets up request message; The first dedicated bearer between request message foundation with first terminal is set up according to the first dedicated bearer;

First retransmission unit 81, the access request message from the second terminal that the PGW for receiving in the second terminal place EPC forwards, the destination address carried in this access request message is the address information of the micronet that first terminal is supported; Described access request message is transmitted to first terminal by the first dedicated bearer.

Further, described set up unit 80 also for:

Described first retransmission unit 81 for:

Further, this packet data gateway also comprises:

Second retransmission unit 82, for after described access request message is transmitted to first terminal by the first dedicated bearer, receive the response message that first terminal is sent by the first dedicated bearer, the destination address in this response message is the address information of the second terminal; By the GTP tunnel of the SGi interface between the PGW in the second terminal place EPC described response message sent to the PGW in the second terminal place EPC.

Further, this packet data gateway also comprises:

Amendment unit 83, for receiving the GTP tunnel of the PGW in the second terminal place EPC by the SGi interface between the PGW in the second terminal place EPC, the address information of the second terminal sent; First dedicated bearer of record is set up the address information that the remote address of packet filter PF information in request message and the content modification of subnet mask field are the second terminal, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And,

See Fig. 9, the embodiment of the present invention provides a kind of packet data gateway, and this packet data gateway comprises:

Set up unit 90, the second dedicated bearer sent for receiving the second terminal sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to described micronet, and this next-hop address information is the address information of first terminal; The second dedicated bearer between request message foundation with the second terminal is set up according to the second dedicated bearer; Under the address information of the second terminal, the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record; And set up the GPRS Tunnel Protocol GTP tunnel of the SGi interface between the PGW in the EPC of first terminal place;

First retransmission unit 91, for receiving the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of described micronet; According to the first routing iinformation described access request message sent to the PGW in the EPC of first terminal place by described GTP tunnel.

Further, this packet data gateway also comprises:

Second retransmission unit 92, the response message from first terminal that the PGW for receiving in the EPC of first terminal place forwards, the destination address in this response message is the address information of the second terminal; By the second carrying, this response message is sent to the second terminal.

Further, described set up unit 90 also for:

After the second dedicated bearer of reception second terminal transmission sets up request message, the address information of the second terminal is sent to the PGW in the EPC of first terminal place by described GTP tunnel.

Further, this packet data gateway also comprises:

Transmitting element 93, before the second dedicated bearer for sending in reception second terminal sets up request message, by the address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal are supported, sends to the second terminal.

To sum up, beneficial effect of the present invention comprises:

In the scheme that the embodiment of the present invention provides, support that the first terminal of micronet sends the first dedicated bearer to network side and sets up request message, network side sets up the first dedicated bearer between first terminal; Second terminal sends the second dedicated bearer to network side and sets up request message, second dedicated bearer sets up in request message the next-hop address information carrying and go to this micronet, this next-hop address information is the address information of first terminal, network side sets up the second dedicated bearer between the second terminal, and the first routing iinformation that the next-hop address information of this micronet is the address information of first terminal gone in record under the address information of the second terminal; Second terminal sends access request message by the second dedicated bearer to network side, the destination address carried in this access request message is the address information of this micronet, access request message is transmitted to first terminal by the first dedicated bearer according to the first routing iinformation by network side, and this access request message is transmitted to the equipment in micronet by first terminal.Visible, present invention achieves the scheme of the micronet that the second terminal access first terminal is supported, namely achieve the remote access scheme in LTE network.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. the remote access method in Long Term Evolution LTE network, it is characterized in that, the method comprises:

First terminal receives the access request message from the second terminal that network side forwards, and described access request message is that the second terminal is set up by network side and the second dedicated bearer between the second terminal sends to network side; Described access request message is that network side is transmitted to first terminal by the first dedicated bearer between first terminal; The destination address carried in described access request message is the address information of the micronet that first terminal is supported; To be the second terminal send the second dedicated bearer to network side to described second dedicated bearer sets up request message and set up, described second dedicated bearer sets up in request message the next-hop address information carrying and go to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal;

2. the method for claim 1, is characterized in that, the first dedicated bearer sets up in request message the address information of carrying the micronet that first terminal is supported.

3. method as claimed in claim 2, is characterized in that, sets up the address information of carrying the micronet that first terminal is supported in the local address of the packet filter PF information in request message and subnet mask field at the first dedicated bearer.

4. method as claimed in claim 3, is characterized in that, before first terminal to send to network side after the first dedicated bearer sets up request message and receives the described access request message that network side forwards, comprises further:

Receive the dedicated bearer amendment order that network side sends, be the address information of the second terminal by the remote address of described PF information of record and the content modification of subnet mask field according to this dedicated bearer amendment order, and control according to amended information on the first dedicated bearer, only transmit the message mailing to the second terminal.

5., as the method as described in arbitrary in claim 1-4, it is characterized in that, after described access request message is transmitted to the equipment in described micronet by first terminal, comprise further:

First terminal receives the response message that the equipment in described micronet returns, and the destination address in this response message is the address information of the second terminal;

First terminal sends described response message by the first dedicated bearer to network side.

6. the remote access method in Long Term Evolution LTE network, it is characterized in that, the method comprises:

The second dedicated bearer between that second terminal is set up by network side and the second terminal sends access request message to network side, described access request message is that network side is transmitted to first terminal by the first dedicated bearer between first terminal, described first dedicated bearer sends the first dedicated bearer by first terminal to network side and sets up request message foundation, and the destination address carried in described access request message is the address information of described micronet.

7. method as claimed in claim 6, is characterized in that, set up in the down hop field of the packet filter PF information in request message carry described next-hop address information at the second dedicated bearer.

8. method as claimed in claim 7, is characterized in that, carry the address information of described micronet in the remote address and subnet mask field of described PF information.

9. as the method as described in arbitrary in claim 6-8, it is characterized in that, to send to network side before the second dedicated bearer sets up request message in the second terminal, comprise further:

Second terminal receives the address information of the micronet of the identification information of first terminal, the address information of first terminal and the first terminal support that network side sends.

10. as the method as described in arbitrary in claim 6-8, it is characterized in that, in the second terminal to after network side sends access request message, comprise further:

Second terminal receives the response message from first terminal that network side is forwarded by the second dedicated bearer, and the destination address in this response message is the address information of the second terminal.

Remote access method in 11. 1 kinds of Long Term Evolution LTE network, it is characterized in that, the method comprises:

The second dedicated bearer that B, network side receive the second terminal transmission sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to micronet, and this next-hop address information is the address information of first terminal; Set up the second dedicated bearer between request message foundation with the second terminal according to the second dedicated bearer, and the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record under the address information of the second terminal;

12. methods as claimed in claim 11, is characterized in that, when first terminal and the second terminal are positioned at same EPC, the executive agent of steps A, step B and step C is the PGW in first terminal and the second terminal place EPC; Or,

When first terminal is positioned at different EPC from the second terminal, the executive agent of steps A is the PGW in the EPC of first terminal place; The executive agent of step B is the PGW in the second terminal place EPC, and the PGW in step B in the second terminal place EPC, receiving after the second dedicated bearer sets up request message, also sets up the GPRS Tunnel Protocol GTP tunnel of the SGi interface between the PGW in the EPC of first terminal place; Step C specifically comprises: the PGW in the second terminal place EPC receives the access request message that the second terminal is sent by the second dedicated bearer, the destination address carried in this access request message is the address information of described micronet, according to the first routing iinformation described access request message sent to the PGW in the EPC of first terminal place by described GTP tunnel, described access request message is transmitted to first terminal by the first dedicated bearer by the PGW in the EPC of first terminal place.

13. methods as claimed in claim 12, is characterized in that, in steps A, network side is after the first dedicated bearer receiving first terminal transmission sets up request message, comprises further:

When the first dedicated bearer sets up in request message the address information of carrying the micronet that first terminal is supported, under the address information of first terminal, record comprises the secondary route information of the address information of described micronet;

Described access request message is transmitted to first terminal by the first dedicated bearer by the PGW in step C in the EPC of first terminal place, specifically comprises:

Described access request message, after determining to comprise the destination address in described access request message in secondary route information, is transmitted to first terminal by the first dedicated bearer by the PGW in the EPC of first terminal place.

14. methods as described in claim 12 or 13, it is characterized in that, when first terminal and the second terminal are positioned at same EPC, the PGW in first terminal and the second terminal place EPC comprises after described access request message is transmitted to first terminal by the first dedicated bearer further:

PGW in first terminal and the second terminal place EPC receives the response message that first terminal is sent by the first dedicated bearer, and the destination address in this response message is the address information of the second terminal; By the second carrying, this response message is sent to the second terminal.

15. methods as described in claim 12 or 13, it is characterized in that, when first terminal is positioned at different EPC from the second terminal, the PGW in the EPC of first terminal place comprises after described access request message is transmitted to first terminal by the first dedicated bearer further:

PGW in the EPC of first terminal place receives the response message that first terminal is sent by the first dedicated bearer, and the destination address in this response message is the address information of the second terminal; By described GTP tunnel described response message sent to the PGW in the second terminal place EPC, this response message is sent to the second terminal by the second carrying by the PGW in the second terminal place EPC.

16. methods as described in claim 12 or 13, it is characterized in that, when first terminal and the second terminal are positioned at same EPC, the PGW in first terminal and the second terminal place EPC receive second terminal send the second dedicated bearer set up request message after, comprise further:

First dedicated bearer of record is set up the address information that the remote address of packet filter PF information in request message and the content modification of subnet mask field are the second terminal by the PGW in first terminal and the second terminal place EPC, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And,

PGW in first terminal and the second terminal place EPC sends dedicated bearer amendment order to first terminal, and the content modification of the remote address and subnet mask field of the first dedicated bearer of record being set up the PF information in request message to indicate first terminal is the address information of the second terminal.

17. methods as described in claim 12 or 13, is characterized in that, when first terminal is positioned at different EPC from the second terminal, the PGW in the second terminal place EPC receives after the second dedicated bearer that the second terminal sends sets up request message, comprises further:

The address information of the second terminal is sent to the PGW in the EPC of first terminal place by the PGW in the second terminal place EPC by described GTP tunnel, first dedicated bearer of record is set up the address information that the remote address of packet filter PF information in request message and the content modification of subnet mask field are the second terminal by the PGW in the EPC of first terminal place, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And,

PGW in the EPC of first terminal place sends dedicated bearer amendment order to first terminal, and the content modification of the remote address and subnet mask field of the first dedicated bearer of record being set up the PF information in request message to indicate first terminal is the address information of the second terminal.

18., as the method as described in arbitrary in claim 11-13, is characterized in that, receive before the second dedicated bearer that the second terminal sends sets up request message, comprise further at network side:

The address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal are supported by network side, sends to the second terminal.

19. 1 kinds of terminals, is characterized in that, this terminal comprises:

Receiving element, for receiving the access request message from the second terminal that network side forwards, described access request message is that the second terminal is set up by network side and the second dedicated bearer between the second terminal sends to network side; Described access request message is that network side is transmitted to this terminal by the first dedicated bearer between this terminal; To be the second terminal send the second dedicated bearer to network side to described second dedicated bearer sets up request message and set up, described second dedicated bearer sets up in request message the next-hop address information carrying and go to the micronet that first terminal is supported, this next-hop address information is the address information of first terminal; The destination address carried in described access request message is the address information of the micronet that this terminal is supported, the second terminal is the terminal with this terminal with binding relationship;

20. terminals as claimed in claim 19, is characterized in that, the first dedicated bearer sets up in request message the address information of carrying the micronet that this terminal is supported.

21. terminals as claimed in claim 20, is characterized in that, set up the address information of carrying the micronet that this terminal is supported in the local address of the packet filter PF information in request message and subnet mask field at the first dedicated bearer.

22. terminals as claimed in claim 21, it is characterized in that, this terminal also comprises:

Amendment unit, for to send to network side after the first dedicated bearer sets up request message and before receiving the described access request message that network side forwards, receive the dedicated bearer amendment order that network side sends, be the address information of the second terminal by the remote address of described PF information of record and the content modification of subnet mask field according to this dedicated bearer amendment order, and control according to amended information on the first dedicated bearer, only transmit the message mailing to the second terminal.

23., as the terminal as described in arbitrary in claim 19-22, is characterized in that, described receiving element also for:

Described transmitting element also for:

24. 1 kinds of terminals, is characterized in that, this terminal comprises:

Second transmitting element, for set up by network side and the second dedicated bearer between this terminal send access request message to network side, described access request message is that network side is transmitted to first terminal by the first dedicated bearer between first terminal, described first dedicated bearer sends the first dedicated bearer by first terminal to network side and sets up request message foundation, and the destination address carried in described access request message is the address information of described micronet.

25. terminals as claimed in claim 24, is characterized in that, set up in the down hop field of the packet filter PF information in request message carry described next-hop address information at the second dedicated bearer.

26. terminals as claimed in claim 25, is characterized in that, carry the address information of described micronet in the remote address and subnet mask field of described PF information.

27. as the terminal as described in arbitrary in claim 24-26, and it is characterized in that, this terminal also comprises:

First receiving element, for sending before the second dedicated bearer sets up request message to network side, is receiving the address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal that network side sends are supported.

28. as the terminal as described in arbitrary in claim 24-26, and it is characterized in that, this terminal also comprises:

Second receiving element, for after sending access request message to network side, receive the response message from first terminal that network side is forwarded by the second dedicated bearer, the destination address in this response message is the address information of this terminal.

29. 1 kinds of packet data gateway, is characterized in that, this packet data gateway comprises:

Second sets up unit, and the second dedicated bearer sent for receiving the second terminal sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to micronet, and this next-hop address information is the address information of first terminal; Set up the second dedicated bearer between request message foundation with the second terminal according to the second dedicated bearer, and the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record under the address information of the second terminal;

30. packet data gateway as claimed in claim 29, is characterized in that, described first set up unit also for:

Described first retransmission unit is used for:

31. packet data gateway as described in claim 29 or 30, it is characterized in that, this packet data gateway also comprises:

Second retransmission unit, for after described access request message is transmitted to first terminal by the first dedicated bearer, receive the response message that first terminal is sent by the first dedicated bearer, the destination address in this response message is the address information of the second terminal; By the second carrying, this response message is transmitted to the second terminal.

32. packet data gateway as described in claim 29 or 30, it is characterized in that, this packet data gateway also comprises:

Amendment unit, after the second dedicated bearer for sending in reception second terminal sets up request message, first dedicated bearer of record is set up the address information that the remote address of packet filter PF information in request message and the content modification of subnet mask field are the second terminal, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And,

33. packet data gateway as described in claim 29 or 30, it is characterized in that, this packet data gateway also comprises:

Transmitting element, before the second dedicated bearer for sending in reception second terminal sets up request message, by the address information of the micronet that the identification information of first terminal, the address information of first terminal and first terminal are supported, sends to the second terminal.

34. 1 kinds of packet data gateway, is characterized in that, this packet data gateway comprises:

Set up unit, the first dedicated bearer sent for receiving first terminal sets up request message, sets up the first dedicated bearer between request message foundation with first terminal according to the first dedicated bearer; The second dedicated bearer receiving the second terminal transmission sets up request message, and the second dedicated bearer sets up in request message the next-hop address information being carried to micronet, and this next-hop address information is the address information of first terminal; The second dedicated bearer between request message foundation with the second terminal is set up according to the second dedicated bearer; Under the address information of the second terminal, the first routing iinformation that the next-hop address information of described micronet is the address information of first terminal gone in record; And set up the GPRS Tunnel Protocol GTP tunnel of the SGi interface between the PGW in the EPC of first terminal place;

35. packet data gateway as claimed in claim 34, is characterized in that, described set up unit also for:

Described first retransmission unit is used for:

36. packet data gateway as described in claim 34 or 35, it is characterized in that, this packet data gateway also comprises:

Second retransmission unit, for after described access request message is transmitted to first terminal by the first dedicated bearer, receive the response message that first terminal is sent by the first dedicated bearer, the destination address in this response message is the address information of the second terminal; By the GTP tunnel of the SGi interface between the PGW in the second terminal place EPC described response message sent to the PGW in the second terminal place EPC.

37. packet data gateway as described in claim 34 or 35, it is characterized in that, this packet data gateway also comprises:

Amendment unit, for receiving the GTP tunnel of the PGW in the second terminal place EPC by the SGi interface between the PGW in the second terminal place EPC, the address information of the second terminal sent; First dedicated bearer of record is set up the address information that the remote address of packet filter PF information in request message and the content modification of subnet mask field are the second terminal, to control only to transmit on the first dedicated bearer the message that the second terminal sends according to amended information; And,

38. 1 kinds of packet data gateway, is characterized in that, this packet data gateway comprises:

39. packet data gateway as claimed in claim 38, it is characterized in that, this packet data gateway also comprises:

Second retransmission unit, the response message from first terminal that the PGW for receiving in the EPC of first terminal place forwards, the destination address in this response message is the address information of the second terminal; By the second carrying, this response message is sent to the second terminal.

40. packet data gateway as claimed in claim 38, is characterized in that, described set up unit also for:

41. as the packet data gateway as described in arbitrary in claim 38-40, and it is characterized in that, this packet data gateway also comprises: