CN106233759A

CN106233759A - The retransmission method of internet protocol message, mobile gateway and radio network controller

Info

Publication number: CN106233759A
Application number: CN201480078084.9A
Authority: CN
Inventors: 曾广珠; 谢勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-04-22
Filing date: 2014-04-22
Publication date: 2016-12-14
Anticipated expiration: 2034-04-22
Also published as: CN106233759B; WO2015161451A1

Abstract

The present invention provides the retransmission method of a kind of internet protocol message, mobile gateway and radio network controller.The method includes: the first mobile gateway receives the first message that SNC sends；Wherein, the IP message routing to the first routing node that described first message will receive for indicating described first mobile gateway, a described IP message includes the identifier of mobile terminal UE；A described IP message routing extremely described first routing node that described first mobile gateway will receive according to described first message.The method that the embodiment of the present invention provides, the first message sent by SNC makes UE when a netsurfing to another network, oneth IP message can be forwarded on the first routing node by the mobile gateway in another network according to the first message, thus by the first routing node by an IP message routing to UE；And so that UE can the fixing IP address of permanent configuration one, facilitate the addressing of mobile terminal.

Description

The retransmission method of internet protocol message, mobile gateway and radio network controller

Retransmission method, mobile gateway and the radio network controller technical field of internet protocol message

The present invention relates to the communication technology, more particularly to a kind of retransmission method of internet protocol message, mobile gateway and radio network controller.Background technology

Mobile Internet Protocol（Internet Protocol, hereinafter referred to as IP) it is a kind of network level schemes that locomotive function is provided on the internet, mobile node is set not interrupt ongoing communication in handoff links, IP is particularly moved there is provided a kind of IP routing mechanisms, mobile node is connected to a fixed IP address on any link.Mobile IP v 6, keeps constantly providing specific solution, specifically for realizing that mobile node communicates in Internet moving process：When mobile node is in the network segment of local, it and communication node（The communication node is the equipment with routing function, such as wireless router）Between communicated according to traditional route technology, it is not necessary to the intervention of mobile IP v 6；When mobile node is moved to foreign link, the home address of mobile node keeps constant, while obtaining an interim IP address（That is Care-of Address）, and the mapping of home address and Care-of Address is informed home agent by mobile node；The packet that the equipment communicated with above-mentioned mobile node is sent to mobile node is still sent to the home address of mobile node；Home agent can intercept and capture these packets, and the Care-of Address of mobile node is forwarded it to according to acquired mapping relations by tunnel style so that mobile node can be communicated with the equipment.But, when message is forwarded in the communication node of mobile network, for example：Packet data gateway (Packet Gateway, hereinafter referred to as PGW), gateway（Serving Gateway, hereinafter referred to as SGW), evolved base station（Evolved Node B, hereinafter referred to as eNB) between forward when, it is necessary to pass through general packet radio service technology tunnel protocol（General Packet Radio Service Tunnel ing Protocol, hereinafter referred to as GTP) tunnel carrying so that IP messages are in forwarding with very big time delay, and the expense of the network equipment is larger.

In order to solve the time delay and the big technical problem of expense of above-mentioned tunnel forwarding, base station is cancelled, the substitute is simple IP routing forwardings by the prior art network architecture as shown in Figure 1 by building to the GTP tunnel between mobile gateway.

But, in the prior art, when mobile terminal is from a network switching to another new network, Other communication equipments issue UE message new network can not routing forwarding, i.e., the mobile gateway in new network do not known how IP message routings to corresponding mobile terminal.The content of the invention

The present invention provides a kind of retransmission method of internet protocol message, mobile gateway and radio network controller, to solve in the prior art when mobile terminal is from a network switching to another new network, other communication equipments issue UE message new network can not routing forwarding technical problem.

In a first aspect, the present invention provides a kind of mobile gateway, including：

Receiver, the first message for receiving radio network controller SNC transmissions；Wherein, the first message is used to indicate the mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；

Transmitter, for according to the first message by the first IP message routings received to first routing node.

With reference in a first aspect, in the first possible embodiment of first aspect, the mobile gateway also includes：

Processor, after receiving the first message that the SNC is sent in the receiver, the next tiny node UENH list items of mobile terminal are generated according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

With reference to the first possible embodiment of first aspect, in second of possible embodiment of first aspect, the receiver is additionally operable to receive the first IP messages that the network equipment is sent；The processor, UENH tables are looked for specifically for the identifier Check of the UE in the first IP messages, are obtained Check and are looked for result；Wherein, the UENH tables include the UENH list items；And look for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；

The then transmitter, specifically for the 2nd IP messages are sent to first routing node.With reference to second of possible embodiment of first aspect, in the third possible embodiment of first aspect, the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, the then processor, specifically for generating UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE； Or, UEGW list items are generated according to the first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEGW list items are the UE, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

With reference to the third possible embodiment of first aspect, in the 4th kind of possible embodiment of first aspect, the processor judges to operate, obtains the first judged result specifically for performing first;Wherein, described first judges that operation includes：The processor judges whether the destination address of the first IP messages is identical with the host address of the mobile gateway, and judges whether the route heads of the first IP messages is empty；And the identifier Check of the UE in first judged result and the first IP messages looks for the UENH tables, obtain Check and look for result.

With reference to the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment of first aspect, the processor, if identical with the host address of the mobile gateway for the destination address of the first IP messages specifically for first judged result, and the route head of the first IP messages is not sky, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

With reference to the 5th kind of possible embodiment of first aspect, in the 6th kind of possible embodiment of first aspect, the processor, if looking for result to look for the UEBS list items success for the processor Check specifically for the Check, it is the first base station then to determine first routing node, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages；

The then transmitter, specifically for the 2nd IP messages are sent to the first base station.With reference to the 4th kind of possible embodiment of first aspect, in the 7th kind of possible embodiment of first aspect, the processor, if being that the destination address of the first IP messages and the host address of the mobile gateway are differed specifically for first judged result, then judge whether the destination address of the first IP messages is identical with the network address of the mobile gateway, obtain the second judged result；And the identifier Check of the UE in second judged result and the first IP messages looks for the UENH tables, obtain the Check and look for result.

With reference to the 7th kind of possible embodiment of first aspect, in the 8th kind of possible embodiment of first aspect, the processor, if identical with the network address of the mobile gateway for the destination address of the first IP messages specifically for second judged result, according in the first IP messages The UEBS list items that UE identifier Check is looked in the UEBS tables, obtain the Check and look for result.With reference to the 8th kind of possible embodiment of first aspect, in the 9th kind of possible embodiment of first aspect, the processor, if looking for the UEBS list items success specifically for the Check identifier Check for looking for result to be the UE of the processor in the first IP messages, it is the first base station then to determine first routing node, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages, and the identifier of the UE is added in the route of the 2nd IP messages head；

The then transmitter, specifically for the 2nd IP messages are sent to the first base station.With reference to the 8th kind of possible embodiment of first aspect, in the tenth kind of possible embodiment of first aspect, the processor, if looking for result to look for the UEBS list items unsuccessful for the processor Check specifically for the Check, the UEGW list items that the identifier Check of the UE in the first IP messages is looked in the UEGW tables；If the UE of the processor in the first IP messages identifier Check looks for the UEGW list items success, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then the transmitter, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

With reference to the 8th kind of possible embodiment of first aspect, in a kind of possible embodiments of ^ of first aspect, the processor, if it is that the destination address of the first IP messages and the network address of the mobile gateway are differed to be additionally operable to second judged result, the UEGW list items that then the identifier Check of the UE in the first IP messages is looked in the UEGW corresponding tables, obtain Check and look for result.

With reference to a kind of possible embodiments of ^ of first aspect, in the 12nd kind of possible embodiment of first aspect, the processor, if looking for the UEGW list items success specifically for the Check identifier Check for looking for result to be the UE of the mobile gateway in the first IP messages, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, generate the 2nd IP messages, and the identifier of the UE is added in the route of the 2nd IP messages head； Then the transmitter, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

Any one of the third possible embodiment with reference to first aspect to first aspect, in the 13rd kind of possible embodiment of first aspect, if the UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, the mobile gateway is the mobile gateway of the current roaming networks of the UE, the then processor, it is additionally operable to when the receiver receives the 3rd IP messages that the UE is sent by the first base station, by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；And be set to the IP address of the mobile gateway after the new source address of the 3rd IP messages, 3rd IP messages are sent to the target device communicated with the UE, so that the first IP messages are sent to the mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of the mobile gateway.

Second aspect, the present invention provides a kind of radio network controller, including：

Transmitter, for sending first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

The third aspect, the present invention provides a kind of mobile gateway, including：

Receiving module, the first message for receiving radio network controller SNC transmissions；Wherein, the first message is used to indicate the mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；

First sending module, for according to the first message by the first IP message routings received to first routing node.

With reference to the third aspect, in the first possible embodiment of the third aspect, the mobile gateway also includes：

Generation module, for generating the next tiny node UENH list items of mobile terminal according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

With reference to the first possible embodiment of the third aspect, in second of possible embodiment of the third aspect, first sending module is specifically included： Receiving unit, the first IP messages for receiving network equipment transmission；

Check looks for unit, and the identifier Check for the UE in the first IP messages looks for UENH tables, obtains Check and looks for result；Wherein, the UENH tables include the UENH list items；

Generation unit, for looking for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；

Transmitting element, for the 2nd IP messages to be sent to first routing node.

With reference to second of possible embodiment of the third aspect, in the third possible embodiment of the third aspect, the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, the then generation module, specifically for generating UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE；Or, UEGW list items are generated according to the first message；Wherein, the UEGW list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

With reference to the third possible embodiment of the third aspect, in the 4th kind of possible embodiment of the third aspect, the Check looks for unit, judges to operate specifically for performing first, obtains the first judged result；Wherein, described first judges that operation includes：Whether the Check looks for the destination address of the first IP messages described in unit judges identical with the host address of the mobile gateway, and judges whether the route heads of the first IP messages is empty；And the identifier Check of the UE in first judged result and the first IP messages looks for the UENH tables, obtain Check and look for result.

With reference to the 4th kind of possible embodiment of the third aspect, in the 5th kind of possible embodiment of the third aspect, the Check looks for unit, if identical with the host address of the mobile gateway for the destination address of the first IP messages specifically for first judged result, and the route head of the first IP messages is not sky, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

With reference to the 5th kind of possible embodiment of the third aspect, in the 6th kind of possible embodiment of the third aspect, the generation unit, if looking for result to look for unit Check to look for the UEBS list items success for Check specifically for the Check, it is the first base station then to determine first routing node, and will be described The destination address of first IP messages is changed to the IP address of the first base station, generates the 2nd IP messages；

The then transmitting element, specifically for the 2nd IP messages are sent to the first base station.With reference to the 4th kind of possible embodiment of the third aspect, in the 7th kind of possible embodiment of the third aspect, the Check looks for unit, if it is that the destination address of the first IP messages and the host address of the mobile gateway are differed to be additionally operable to first judged result, then judge whether the destination address of the first IP messages is identical with the network address of the mobile gateway, obtain the second judged result；And the identifier Check of the UE in second judged result and the first IP messages looks for the UENH tables, obtain the Check and look for result.

With reference to the 7th kind of possible embodiment of the third aspect, in the 8th kind of possible embodiment of the third aspect, the Check looks for unit, if identical with the network address of the mobile gateway for the destination address of the first IP messages specifically for second judged result, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

With reference to the 8th kind of possible embodiment of the third aspect, in the 9th kind of possible embodiment of the third aspect, the generation unit, if looking for result to look for the UE of the unit in the first IP messages identifier Check to look for the UEBS list items success for the Check specifically for the Check, it is the first base station then to determine first routing node, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages, and the identifier of the UE is added in the route of the 2nd IP messages head；

The then transmitting element, specifically for the 2nd IP messages are sent to the first base station.With reference to the 8th kind of possible embodiment of the third aspect, in the tenth kind of possible embodiment of the third aspect, the generation unit, if looking for result to look for unit Check to look for the UEBS list items unsuccessful for the Check specifically for the Check, the UEGW list items that the identifier Check of the UE in the first IP messages is looked in the UEGW tables；If the Check looks for the UE of the unit in the first IP messages identifier Check to look for the UEGW list items success, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then the transmitting element, specifically for the 2nd IP messages are sent to second mobile gateway, judges to grasp so that second mobile gateway performs described first as the new mobile gateway Make.

With reference to the 8th kind of possible embodiment of the third aspect, in a kind of possible embodiments of ^ of the third aspect, the Check looks for unit, if being that the destination address of the first IP messages and the network address of the mobile gateway are differed specifically for second judged result, the UEGW list items that then the identifier Check of the UE in the first IP messages is looked in the UEGW corresponding tables, obtain Check and look for result.

With reference to a kind of possible embodiments of ^ of the third aspect, in the 12nd kind of possible embodiment of the third aspect, the generation unit, if looking for result to look for the UE of the unit in the first IP messages identifier Check to look for the UEGW list items success for the Check specifically for the Check, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, generate the 2nd IP messages, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then the transmitting element, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

Any one of the third possible embodiment with reference to the third aspect to the third aspect, in the 13rd kind of possible embodiment of the third aspect, if the UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, the mobile gateway is the mobile gateway of the current roaming networks of the UE, then the mobile gateway also includes：

Logging modle, for when the receiving module receives the 3rd IP messages that the UE is sent by the first base station, by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；

Setup module, the new source address for the IP address of the mobile gateway to be set to the 3rd IP messages；

Second sending module, the 3rd IP messages for setup module to be obtained are sent to the target device communicated with the UE, so that the first IP messages are sent to the mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of the mobile gateway.

Fourth aspect, the present invention provides a kind of radio network controller, including：

Sending module, for sending first message to the first mobile gateway；Wherein, the first message is used In indicating first mobile gateway by the first Internet protocol IP message routing to the first routing node received, the first IP messages include the identifier of mobile terminal UE.

5th aspect, the present invention provides a kind of retransmission method of internet protocol message, including：First mobile gateway receives the first message that radio network controller SNC is sent；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；

First mobile gateway is according to the first message by the first IP message routings received to first routing node.

With reference to the 5th aspect, in the first possible embodiment of the 5th aspect, first mobile gateway is received after the first message that radio network controller SNC is sent, and methods described also includes：First mobile gateway generates the next tiny node UENH list items of mobile terminal according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

With reference to the first possible embodiment of the 5th aspect, in second of possible embodiment of the 5th aspect, first mobile gateway according to the first message by the first IP message routings received to first routing node, specifically include：

First mobile gateway receives the first IP messages that the network equipment is sent；

The UE of first mobile gateway in the first IP messages identifier Check looks for UENH tables, obtains Check and looks for result；Wherein, the UENH tables include the UENH list items；

First mobile gateway looks for result to generate the 2nd IP messages according to the Check；Wherein, described second

The destination address of IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；

First mobile gateway sends the 2nd IP messages to first routing node.

With reference to second of possible embodiment of the 5th aspect, in the third possible embodiment of the 5th aspect, the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, then first mobile gateway generates the UENH list items according to the first message, specifically includes：First mobile gateway generates UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE；Or, First mobile gateway generates UEGW list items according to the first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEGW list items are the UE, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

With reference to the third possible embodiment of the 5th aspect, in the 4th kind of possible embodiment of the 5th aspect, the UE of first mobile gateway in the first IP messages identifier Check looks for UENH tables, obtains Check and looks for result, including：

First mobile gateway performs first and judges operation, obtains the first judged result；Wherein, described first judges that operation includes：First mobile gateway judges whether the destination address of the first IP messages is identical with the host address of first mobile gateway, and judges whether the route heads of the first IP messages is empty；

The UE of first mobile gateway in first judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result.

With reference to the 4th kind of possible embodiment of the 5th aspect, in the 5th kind of possible embodiment of the 5th aspect, the UE of first mobile gateway in first judged result and the first IP messages identifier Check looks for the UENH tables, obtain Check and look for result, specifically include：

If first judged result is identical with the host address of first mobile gateway for the destination address of the first IP messages, and the route head of the first IP messages is not sky, the UEBS list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEBS tables, obtain the Check and look for result.

With reference to the 5th kind of possible embodiment of the 5th aspect, in the 6th kind of possible embodiment of the 5th aspect, first mobile gateway looks for result to generate the 2nd IP messages according to the Check, specifically includes:If the Check looks for result to look for the UEBS list items success for the first mobile gateway Check, then first mobile gateway determines that first routing node is the first base station, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages；

Then first mobile gateway sends the 2nd IP messages to first routing node, specifically includes：

First mobile gateway sends the 2nd IP messages to the first base station.

With reference to the 4th kind of possible embodiment of the 5th aspect, in the 7th kind of possible embodiment of the 5th aspect, first mobile gateway is according in first judged result and the first IP messages The identifier Check of the UE look for the UENH tables, obtain Check and look for result, in addition to：Differed if first judged result is the destination address of the first IP messages and the host address of first mobile gateway, then first mobile gateway judges whether the destination address of the first IP messages is identical with the network address of first mobile gateway, obtains the second judged result；

First mobile gateway is according in second judged result and the first IP messages

UE identifier Check looks for the UENH tables, obtains the Check and looks for result.

With reference to the 7th kind of possible embodiment of the 5th aspect, in the 8th kind of possible embodiment of the 5th aspect, the UE of first mobile gateway in second judged result and the first IP messages identifier Check looks for the UENH tables, obtain Check and look for result, specifically include：

If second judged result is identical with the network address of first mobile gateway for the destination address of the first IP messages, the UEBS list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEBS tables, obtain the Check and look for result.

With reference to the 8th kind of possible embodiment of the 5th aspect, in nine kinds of possible embodiments of the 5th aspect, first mobile gateway looks for result to generate the 2nd IP messages according to the Check, specifically includes：If the Check look for result for first mobile gateway according in the first IP messages

UE identifier Check looks for the UEBS list items success, then first mobile gateway determines that first routing node is the first base station, and the destination address of the first IP messages is changed to the IP address of the first base station, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

First mobile gateway sends the 2nd IP messages to the first base station.

With reference to the 8th kind of possible embodiment of the 5th aspect, in ten kinds of possible embodiments of the 5th aspect, first mobile gateway looks for result to generate the 2nd IP messages according to the Check, in addition to：If the Check looks for result to look for the UEBS list items unsuccessful for the first mobile gateway Check, described in the UE of first mobile gateway in the first IP messages identifier Check is looked for

The UEGW list items in UEGW tables；

If the UE of first mobile gateway in the first IP messages identifier Check looks for the UEGW list items success, then first mobile gateway determines that second mobile gateway is first routing node, and the destination address of the first IP messages is changed into second mobile network The IP address of pass, generates the 2nd IP messages, and the identifier of the UE is added in the route of the 2nd IP messages head；

First mobile gateway sends the 2nd IP messages to second mobile gateway, judges to operate so that second mobile gateway performs described first as the first new mobile gateway.

With reference to the 8th kind of possible embodiment of the 5th aspect, in a kind of possible embodiments of ^ of the 5th aspect, the UE of first mobile gateway in second judged result and the first IP messages identifier Check looks for the UENH tables, obtain Check and look for result, in addition to：

Differed if second judged result is the destination address of the first IP messages and the network address of first mobile gateway, the UEGW list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEGW corresponding tables, obtain Check and look for result.

With reference to a kind of possible embodiments of ^ of the 5th aspect, in 12 kinds of possible embodiments of the 5th aspect, first mobile gateway looks for result to generate the 2nd IP messages according to the Check, specifically includes：

If the identifier Check that the Check looks for result to be the UE of first mobile gateway in the first IP messages looks for the UEGW list items success, then first mobile gateway determines that second mobile gateway is first routing node, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

With reference to any one of the 5th aspect to the third possible embodiment of the 5th aspect, in 13 kinds of possible embodiments of the 5th aspect, if the UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, first mobile gateway is the mobile gateway of the current roaming networks of the UE, then methods described also includes：

First mobile gateway is when receiving the 3rd IP messages that the UE is sent by the first base station, and first mobile gateway records the source address of the 3rd IP messages the described 3rd In the route head of IP messages；

The IP address of first mobile gateway is set to the new source address of the 3rd IP messages by first mobile gateway；

3rd IP messages are sent to the target device with the UE communication by first mobile gateway, so that the first IP messages are sent to first mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of first mobile gateway.

6th aspect, the present invention provides a kind of retransmission method of internet protocol message, including：Radio network controller SNC sends first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

Retransmission method, mobile gateway and the radio network controller of internet protocol message provided in an embodiment of the present invention, receiving being used for of sending by receiver indicates mobile gateway by the first message of the first Internet protocol IP message routing to the first routing node received so that transmitter is according to the first message by the first IP message routings to the first routing node received.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.Brief description of the drawings is in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

The network architecture schematic diagram that Fig. 1 provides for the present invention；

The structural representation for the mobile gateway embodiment one that Fig. 2 provides for the present invention；

The structural representation for the mobile gateway embodiment two that Fig. 3 provides for the present invention； The structural representation for the mobile gateway embodiment three that Fig. 4 provides for the present invention；

The structural representation for the mobile gateway example IV that Fig. 5 provides for the present invention；

The structural representation for the mobile gateway embodiment five that Fig. 6 provides for the present invention；

The structural representation for the mobile gateway embodiment six that Fig. 7 provides for the present invention；

The schematic flow sheet of the retransmission method embodiment one for the internet protocol message that Fig. 8 provides for the present invention；The schematic flow sheet of the retransmission method embodiment two for the internet protocol message that Fig. 9 provides for the present invention；The schematic flow sheet of the retransmission method embodiment three for the internet protocol message that Figure 10 provides for the present invention；

The schematic flow sheet of the retransmission method example IV for the internet protocol message that Figure 11 provides for the present invention；

The signaling process figure of the retransmission method embodiment five for the internet protocol message that Figure 12 provides for the present invention；

The signaling process figure of the retransmission method embodiment seven for the internet protocol message that Figure 13 provides for the present invention；

The signaling process figure of the retransmission method embodiment eight for the internet protocol message that Figure 14 provides for the present invention.Embodiment is to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

The present embodiments relate to mobile terminal, can be wireless terminal.Wireless terminal can refer to the equipment for providing a user voice and/or data connectivity, portable equipment with wireless connecting function or other processing equipments for being connected to radio modem.Wireless terminal can be through wireless access network（For example, RAN, Radio Access Network) communicated with one or more core nets, wireless terminal can be mobile terminal, such as mobile phone（Or be " honeycomb " phone）With the computer with mobile terminal, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchange language and/or data with wireless access network.For example, individual People's communication service (PCS, Personal Communication Service) phone, wireless phone, Session initiation Protocol（SIP) phone, WLL（WLL, Wireless Local Loop) stand, personal digital assistant（PDA, Personal Digital Assistant) etc. equipment.Wireless terminal is referred to as system, subscri er unit（Subscriber Unit), subscriber station (Subscriber Station), movement station (Mobile Station), mobile station (Mobile), distant station (Remote Station), remote standing grain be in terminal (Remote Terminal), access terminal (Access Terminal), user terminal（User Terminal), user agent（User Agent), user equipment（User Device) or subscriber's installation (User Equipment).

The base station being related in the application（For example, access point）It can refer in access network on interface in the air by one or more sectors and the equipment of wireless terminal communications.Base station can be used for IP packets mutually being changed the air frame received, and as the router between wireless terminal and the remainder of access network, the remainder of wherein access network may include Internet protocol（IP) network.Attribute management of the base station also tunable to air interface.For example, base station can be the base station in GSM or CDMA（BTS, Base Transceiver Station) or WCDMA in base station（NodeB), it can also be the evolved base station in LTE（NodeB or eNB or e-NodeB, evolutional Node B), including WiFi AP equipment, the application is not limited.

In embodiments of the present invention, can be using the network architecture diagram shown in Fig. 1.In the network, the main network equipment includes radio network controller（Wireless Controler, hereinafter referred to as SNC), base station（) and mobile gateway uNB（Gateway) .Wherein, base station solves the covering problem of wireless network, and wireless access is provided for UE；In addition, the control management of wireless network is realized in base station by the interface with SNC；By the interface with mobile gateway, the forwarding of UE user face data messages is realized.The major function of mobile gateway is to realize the forwarding information that mobile terminal is safeguarded in the forwarding of UE user face data messages, mobile gateway, and passes through the forwarding information of the chain of command interface acquisition mobile terminal between SNC.SNC is the control core of whole wireless network.SNC has mobile management entity in legacy network (Mobility Management Entity, hereinafter referred to as MME) to functions such as UE mobile management, session management, safety managements；SNC is also exchanged with the base station in mobile network, mobile gateway, controls their forwarding behavior.

In a mobile network, certain region can be divided.Generally, the Network in a region is responsible in one SNC and mobile gateway and corresponding multiple base stations, there is the passage for also having data forwarding between control signaling interface, the mobile gateway in multiple regions between the SNC in multiple regions, so by whole mobile radio communication Network is got through, so that UE is roamed into behind other regions, also can normally provide Network.

When UE there is provided the SNC of control function and provides the mobile gateway of data forwarding function still still original equipment when multiple base stations in a region switch.Referring to Fig. 1, UE from uNBl be switched to uNB2 when, exactly there occurs the switching between base station.

When UE roams into another region from a region, not only base station resident UE can switch, and the SNC for even providing control function and the mobile gateway for providing data forwarding function may all switch.Referring to Fig. 1, UE from uNB2 be switched to uNB3 when there is provided the mobile gateway of data forwarding function by local gateway（Home Gateway) switch to roaming place gateway（Visit Gateway) .The SNC (Visit SNC) of the SNC (Home SNC) of home network and roaming network is closed together in Fig. 1, and is in practice likely to be two SNC;Also, it may also have communication interface between two SNC.

In embodiments of the present invention, no matter UE is that occur to switch between base station in region, or the roaming switch between generation area, because operator can be UE distribution all the life unique IP addresses all the time（That is UE identifier）, therefore UE IP address is not changed after handover, i.e., the upper-layer service on UE will not be caused to apply because UE IP address changes and interrupts.As shown in figure 1, UE identifier can be thought as mobile terminal IP (UE IP, abbreviation UIP) address.With entering a Walk, the network shown in Fig. 1 can configure globally unique fixation IP addresses for each network node.

The structural representation for the mobile gateway embodiment one that Fig. 2 provides for the present invention.As shown in Fig. 2 the mobile gateway includes：Receiver 10 and transmitter 11.Wherein, receiver 10, the first message for receiving SNC transmissions；Wherein, the first message be used for indicate the mobile gateway by the first IP message routings received to the first routing node, the first IP messages include mobile terminal（User Equipment, hereinafter referred to as UE) identifier；Transmitter 11, for according to the first message by the first IP message routings received to first routing node.

Specifically, UE starts shooting when being resident mobile communications network first every time, wireless heterogeneous networks are set up with base station first（Radio Resource Control, hereinafter referred to as RRC) connection, the connection of the Non-Access Stratum of UE progress afterwards, i.e. Non-Access Stratum（Non-access Stratum, hereinafter referred to as NAS) network attachment.After adhering to successfully, the mobile communications network can distribute an IP address for UE（That is UE identifier）.

After UE is attached to network, it is attached to after SNC, triggering SNC sends first message to mobile gateway, the first message is used to indicate the mobile gateway by the first IP message routings to the first routing node received, wherein, the first IP messages include UE identifier（I.e. above-mentioned UIP).Need Illustrate, UE identifier can be located in the route head of the first IP messages or the first IP messages destination address, it is necessary to depending on different situations.

For example, when target device is communicated with UE, UE can according to traditional routing forwarding scheme to target device send uplink message, that is the base station that the uplink message that UE is sent is resident through UE reaches the mobile gateway for the network that UE is resident, and the uplink message then is sent into target device by mobile gateway.When target device sends downlink message to UE, if UE is currently without roaming, that is UE-be directly in home network or switched between the base station of home network, then target device can send downlink message to the local gateway of the home network where UE, and the downlink message is transmitted into UE by local gateway;If UE currently roams into roaming place network from home network, according to IP route technology principles, all downlink messages for issuing UE should also be sent to the local gateway of UE home network first, again by local gateway forwards to UE, but it is due to UE now just in roaming place, local gateway should first issue downlink message roaming place gateway, then the base station by roaming place gateway forwards to the UE roaming places being currently resident, and UE is relayed to by base station.Assuming that the mobile gateway referred in the embodiment of the present invention is the local gateway in Fig. 1, then the first IP messages are exactly the downlink message that target device is sent to the local gateway, and the destination address of the first IP messages is exactly UE identifier;Assuming that the mobile gateway referred in the embodiment of the present invention is the roaming place gateway in Fig. 1, then the first IP messages can be that the downlink message that local gateway sends target device is transmitted to the identifier that UE is carried in the downlink message of roaming place gateway, the route head of the first IP messages after treatment.§ Jie, for the gateway of local, the first IP messages are exactly the message that the target device received is sent to local gateway；For the gateway of roaming place, the first IP messages are exactly the message that local gateway is sent to roaming place gateway.Also, no matter the mobile gateway mentioned by the embodiment of the present invention is to include UE identifier in local gateway or roaming place gateway, its first IP message received.

Receiver 10 receives the first message that SNC is sent, and transmitter 11 can be according to the first message by the first IP message routings to the first routing node received.As shown in above-mentioned example, as UE-be directly in home network or when being switched between the base station of home network, then target device can send the first IP messages to mobile gateway（The destination address of first IP messages is UE identifier）, then it is exactly local gateway that mobile gateway here, which is,；So, here the first routing node can think the base station that UE is resident in home network, so that the base station that the first IP message routings are resident by transmitter 11 according to the first message to UE, so that the first IP messages are transmitted to UE by the base station, the communication between target device and UE is completed.If UE currently roams into roaming place network from home network, target device can be first by the downlink message of transmission（The destination address of the downlink message is UE identifier）Local gateway is sent to, for For the gateway of local, the downlink message is still the first IP messages, so SNC can indicate local gateway when UE roams into roaming place, it is that the downlink message of UE identifier is first forwarded to the roaming place gateway of roaming place by the destination address received, i.e., it is exactly roaming place gateway that the first routing node here, which is,；When roaming place gateway receives the message that local gateway is sent, the message is also the first IP messages for roaming place gateway, SNC indicates that the first IP messages of the local gateway received are sent to the base station in the roaming place network that UE is currently resident by roaming place gateway, the first IP messages are issued into UE by the base station in the network of roaming place, target device and UE communication is completed.Therefore, for the gateway of roaming place, the first routing node here is by base station resident UE in the network of roaming place.

In summary, what the first IP messages can be with mobile gateway role is different and different, and what the first routing node being related in the first message that SNC is sent also can be with mobile gateway role is different and different.But, no matter the role of mobile gateway is local gateway or roaming place gateway, the present embodiments relate to mobile gateway the first IP messages received can be sent to UE, complete the routing forwarding of the first IP messages.

Mobile gateway provided in an embodiment of the present invention, receiving being used for of sending by receiver indicates mobile gateway by the first message of the first Internet protocol IP message routing to the first routing node received so that transmitter is according to the first message by the first IP message routings to the first routing node received.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.

The structural representation for the mobile gateway embodiment two that Fig. 3 provides for the present invention.On the basis of above-mentioned embodiment illustrated in fig. 2, Jin mono- Walk, the mobile gateway also includes：Processor 12, after receiving the first message that the SNC is sent in the receiver 10, the next tiny node of mobile terminal is generated according to the first message（UE Next Hop, hereinafter referred to as UENH) list item；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

Specifically, after SNC sends first message to mobile gateway, optionally, the identifier between UE identifier and the first routing node can be included in the first message.The transmitter 11 of mobile gateway can directly according to the first message by the first IP message routings to the first routing node received, optionally, the processor 12 of mobile gateway can also after receiver 10 receives the first message, according to The first message generates UENH list items, is stored in mobile gateway；Wherein, the UENH list items are UE identifier and the corresponding relation list item of the identifier of the first routing node.When the receiver 10 of mobile gateway receives the first IP messages of network equipment transmission, processor 12 can look for UENH tables according to the identifier Check of the UE in the first IP messages, obtain Check and look for result, the UENH tables include above-mentioned UENH list items.Optionally, the network equipment can also be the target device communicated with UE according to the different and different of mobile gateway role, the i.e. network equipment, can also be local gateway.When mobile gateway is local gateway, the network equipment is target device；When mobile gateway is roaming place gateway, the network equipment is local gateway.

Afterwards, processor 12 looks for result to generate the 2nd IP messages according to the Check, and the destination address of the 2nd IP messages is the identifier of the first routing node, and the route head of the second message includes UE identifier；Finally, the 2nd IP messages are sent to the first routing node by transmitter 11.Need exist for explanation be, although transmitter 11 is that the 2nd IP messages have been sent into the first routing node here, but the content included by the data content and the first IP messages included by actually the 2nd IP messages is identical, simply the destination address of the 2nd IP messages is different from the destination address of the first IP messages, and includes UE identifier in the route head of the 2nd IP messages.

Jin mono- Walk, above-mentioned UENH tables are mobile terminal base station（UE Basic Station, hereinafter referred to as UEBS) table or mobile-terminal gateway（UE Gateway, hereinafter referred to as UEGW) table.Optionally, above-mentioned processor 12, can generate UEBS list items according to the first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEBS list items are UE, here the first routing node is first base station, and the identifier of the first routing node is the IP address of first base station, and the first base station is by base station currently resident UE（If UE is currently resident in home network, the first base station is exactly the base station in home network；If UE is currently resident in the network of roaming place, the first base station is the base station in the network of roaming place）；Optionally, above-mentioned processor 12, can also generate UEGW list items according to first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEGW list items are UE, here the first routing node is the second mobile gateway, the identifier of first routing node is the IP address of the second mobile gateway, and the network where second mobile gateway is by network currently resident UE.

On the basis of above-described embodiment two, it is used as a kind of possible embodiment of the embodiment of the present invention, the identifier Check that the present embodiment refers to UE of the processor 12 in the first IP messages looks for UENH list items to obtain Check looking for result, and looks for result to generate the detailed processes of the 2nd IP messages according to Check.Jin mono- Walk, The processor 12, judges to operate, obtains the first judged result specifically for performing first；Wherein, described first judges that operation includes：The processor 12 judges whether the destination address of the first IP messages is identical with the host address of the mobile gateway, and judges whether the route heads of the first IP messages is empty；And the identifier Check of the UE in first judged result and the first IP messages looks for the UENH tables, obtain Check and look for result.

Specifically, when receiver 10 receives the first IP messages of network equipment transmission, processor 12 can judge whether identical the destination address of the first IP messages is with the host address of the mobile gateway, and whether the route head of the first IP messages is empty, obtains the first judged result.

When mobile gateway is roaming place gateway, i.e., the processor 12 of roaming place gateway receives local gateway in its receiver 10（Local gateway now is the network equipment for sending the first IP messages）It after the first IP messages sent, can judge whether the destination address of the first IP messages is identical with the host address of roaming place gateway, and judge whether the routes of the first IP messages is sky.Accordingly, the first judged result that roaming place gateway is obtained is that the destination address of the first IP messages is identical with the host address of roaming place gateway, and the first IP messages route head for sky, the UEBS list items that then processor 12 in the gateway of roaming place will be looked for according to the identifier Check of the UE in the first IP messages in the UEBS tables generated before processor 12, obtain corresponding Check and look for result（If the first judged result differs for the host address of the destination address and roaming place gateway of the first IP messages, roaming place gateway may abandon the message）.When the Check looks for result to look for the success of UEBS list items for above-mentioned roaming place gateway Check, then the processor 12 in the gateway of roaming place determines that first routing node is first base station（The base station that the first base station is resident by UE in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of first base station, generate the 2nd IP messages；Now the route head of the 2nd IP messages includes UE identifier（Because the route head of the first IP messages is not sky before this, i.e. UE identifier is included in the route head of the first IP messages, processor 12 is changed the destination address of the first IP messages）.Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitter 11.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

When mobile gateway is local gateway, i.e., the processor 12 of local gateway connects in its receiver 10 Receive target device transmission the first IP messages after, can judge whether the destination address of the first IP messages identical with the host address of local gateway, and judge the first IP messages route head whether be sky, acquisition the first judged result.For the gateway of local, the first judged result can have two kinds of situations：The first：When the first judged result is identical with the host address of local gateway for the destination address of the first IP messages, and the first IP messages route head for sky, the UEBS list items that then processor 12 in the gateway of local will be looked for according to the identifier Check of the UE in the first IP messages in the UEBS tables generated before processor 12, obtain corresponding Check and look for result；When the Check looks for result to look for the success of UEBS list items for above-mentioned local gateway Check（Illustrate that now UE is not roamed, and be resident in the first base station in home network）, then the processor 12 in the gateway of local determines that first routing node is first base station, and the destination address of the first IP messages is changed into the IP address of first base station, generates the 2nd IP messages；Now the route head of the 2nd IP messages includes UE identifier.Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitter 11.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

Second：When the first judged result differs for the destination address of the first IP messages with the host address of local gateway, the processor 12 in the gateway of local can do following processing.

Specifically, the processor 12 in the gateway of local, which can enter a Walk, judges whether the destination address of the first IP messages is identical with the network address of local gateway, the second judged result is obtained.For the gateway of local, the second judged result can have two kinds of situations of A and B：

A:If the second judged result is identical with the network address of local gateway for the destination address of the first IP messages, the UEBS list items that UE of the processor 12 in the first IP messages identifier Check is looked in UEBS tables obtain corresponding Check and look for result.It can be divided into following（A), (b) two kinds of situations：

( a) ：When the Check identifier Check for looking for result to be UE of the processor 12 in above-mentioned first IP messages look for the success of UEBS list items（Illustrate that now UE is not roamed, and be resident in the first base station in home network）, then processor 12 determines that the first routing node is first base station, and the destination address of the first IP messages is changed into the IP address of first base station, generates the 2nd IP messages, and UE identifier is added in the route of the 2nd IP messages head.Finally, transmitter 11 by this Two IP messages are sent to the resident first base stations of UE.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

( b ) ：When the Check identifier Check for looking for result to be UE of the processor 12 in above-mentioned first IP messages look for UEBS list items unsuccessful（Illustrate that now UE is not in home network, but roaming place network may have been had roamed to）, processor 12 can be when the UE for receiving SNC transmissions leaves the message of home network, route table items related deletion Home Network Central Shanxi Plain UE（That is UEBS list items）.The UEGW list items that then UE of the processor 12 in above-mentioned first IP messages identifier Check is looked in UEGW tables.If UE of the processor 12 in the first IP messages identifier Check looks for UEGW list items still unsuccessful, processor 12 forwards the message according to traditional method for routing or abandons the message；If UE of the processor 12 in the first IP messages identifier Check looks for the success of UEGW list items, processor 12 determines that the first routing node is the second mobile gateway（Second mobile gateway is the roaming place gateway in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of the second mobile gateway, generates the 2nd IP messages, and by UE identifier added in the route head of the 2nd IP messages.Finally, the 2nd IP messages are sent to the second mobile gateway by transmitter 11；Second mobile gateway is after the 2nd IP messages are received, above-mentioned first can equally be performed and judge operation, judge whether the destination address of the 2nd IP messages is identical with the host address of the second mobile gateway, and judge whether the route heads of the 2nd IP messages is empty.But, because the second mobile gateway is currently the gateway of roaming place, and the 2nd IP messages destination address be exactly the second mobile gateway IP address, and the 2nd IP messages route head in carry UE identifier, therefore, the first judged result that second mobile gateway is obtained is identical with the host address of the second mobile gateway for the destination address of the 2nd IP messages, and the 2nd the route heads of IP messages be not sky, then the second mobile gateway also can the UEBS list items looked in the UEBS tables on the second mobile gateway of Check（This UEBS list item is also that the first message that is sent according to SNC of the second mobile gateway is generated）If the second mobile gateway Check looks for UEBS list items success, the second mobile gateway determines that the first routing node is first base station, and the first base station is the base station in the network of roaming place, and the 2nd IP messages are sent to first base station by the second mobile gateway.First base station is after the 2nd IP messages are received, and the destination for judging the 2nd IP messages is the IP address of itself, and knows the road of the 2nd IP messages UE identifier is carried in head, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

B:Differed if the second judged result is the destination address of the first IP messages and the network address of local gateway（Illustrate that now UE is not in home network, but roaming place network may have been had roamed to）, then the UEGW list items that UE of the processor 12 in the first IP messages identifier Check is looked in UEGW tables obtain corresponding Check and look for result.If UE of the processor 12 in the first IP messages identifier Check looks for UEGW list items unsuccessful, processor 12 forwards the message according to traditional method for routing or abandons the message；If UE of the processor 12 in the first IP messages identifier Check looks for the success of UEGW list items, processor 12 determines that the second mobile gateway is the first routing node（Second mobile gateway is the roaming place gateway in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of the second mobile gateway, generates the 2nd IP messages, and by UE identifier added in the route head of the 2nd IP messages.

Finally, the 2nd IP messages are sent to the second mobile gateway by transmitter 11；Second mobile gateway is after the 2nd IP messages are received, above-mentioned first can equally be performed and judge operation, judge whether the destination address of the 2nd IP messages is identical with the host address of the second mobile gateway, and judge whether the route heads of the 2nd IP messages is empty.But, because the second mobile gateway is currently the gateway of roaming place, and the 2nd IP messages destination address be exactly the second mobile gateway IP address, and the 2nd IP messages route head in carry UE identifier, therefore, the first judged result that second mobile gateway is obtained is identical with the host address of the second mobile gateway for the destination address of the 2nd IP messages, and the 2nd the route heads of IP messages be not sky, then the second mobile gateway also can the UEBS list items looked in the UEBS tables on the second mobile gateway of Check（This UEBS list item is also that the first message that is sent according to SNC of the second mobile gateway is generated）If the second mobile gateway Check looks for UEBS list items success, the second mobile gateway determines that the first routing node is first base station, and the first base station is the base station in the network of roaming place, and the 2nd IP messages are sent to first base station by the second mobile gateway.

First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, i.e., It is reduced into original target device and is sent to UE message originally, so that the first IP messages is sent into UE.

Mobile gateway provided in an embodiment of the present invention, by receiver reception transmission for indicating mobile gateway by the first message of the first IP message routings to the first routing node received, processor generates UENH list items according to the first message, and UENH list items are looked for by the identifier Check of the UE in the first IP messages, obtain Check and look for result, finally cause transmitter to look for result by the first IP message routings to the first routing node received according to the Check.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.

On the basis of above-described embodiment, it is used as the alternatively possible embodiment of the embodiment of the present invention, the present embodiment is referred to when UE is resided in the first base station in the network of roaming place, and mobile gateway be roaming place network in roaming place gateway when, target device is sent to the detailed process that UE the first IP messages can be communicated without local gateway with UE.Jin mono- Walk, above-mentioned processor 12 is additionally operable to when above-mentioned receiver 10 receives the 3rd IP messages that UE is sent by first base station, by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；And be set to the IP address of mobile gateway after the new source address of the 3rd IP messages, 3rd IP messages are sent to the target device with UE communication, so that the first IP messages are sent to mobile gateway by target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of mobile gateway.

Specifically, when UE is attached to the SNC of roaming place network, SNC can indicate that UE is currently resident in the first base station in the network of roaming place to roaming place gateway.As described in above-mentioned embodiment, roaming place gateway can be after the first IP messages be received, the processor 12 of the roaming place gateway can judge that the destination address of the first IP messages is identical with the host address of roaming place gateway, and the first IP messages route head for sky, the UEBS list items that then the identifier Check for the UE that processor 12 can be in the first IP messages is looked in the UEBS tables generated before processor 12, obtain corresponding Check and look for result.When the Check looks for result to look for the success of UEBS list items for above-mentioned roaming place gateway Check, then the processor 12 in the gateway of roaming place determines that first routing node is first base station（The base station that the first base station is resident by UE in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of first base station, Generate the 2nd IP messages；Now the route head of the 2nd IP messages includes UE identifier（Because the route head of the first IP messages is not sky before this, i.e. UE identifier is included in the route head of the first IP messages, processor 12 is simply changed the destination address of the first IP messages）.

Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitter 11.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP addresses of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of 2nd IP messages can be changed to UE identifier by first base station, and know that the 2nd IP messages are to be sent to first base station from roaming place gateway, therefore first base station can empty the route head of the 2nd IP messages, it is reduced into original target device and is sent to UE message originally, so that the first IP messages is sent into UE.

UE in the network of roaming place is intended to send the 3rd IP messages to target device, general, 3rd IP messages are sent to first base station by UE first, 3rd IP messages are sent roaming place gateway by first base station according to traditional routing mode, and the source address of the 3rd IP messages is UE identifier.After roaming place gateway receives the 3rd IP messages of first base station forwarding, can be the IP address of itself by the source address modification of the 3rd IP messages, and by the original source address record of the 3rd IP messages in the route head of the 3rd IP messages, that is now the source address of the 3rd IP messages is the IP address of roaming place gateway, and the route head of the 3rd IP messages includes UE identifier.Afterwards, the 3rd IP messages are sent to target device by roaming place gateway.

Target device records the content in the route head of the 3rd IP messages after the 3rd IP messages are received, and the content in source address according to the 3rd IP messages and route head sends the first new IP messages to UE again（The message for being sent to UE with first time target device can be with identical, can also be different）The destination address of the first new IP messages is set to the IP address of roaming place gateway by target device, and UE identifier is filled in the route head of the first IP messages, the first new IP messages are directly sent to roaming place gateway by target device afterwards, and without passing through local gateway.Because now target device has been known for the path of the 3rd IP message transmissions, it can be configured when sending the first new IP messages to UE according to the content in the 3rd IP message routing heads of record to the path of the first IP messages.

Roaming place gateway is after the first IP messages are received, judge that the destination address of the first IP messages is the IP address of itself by processor 12, and include UE identifier in the route head of the message, thus processor 12 is aware of the first IP messages and is destined to UE, therefore processor 12 will The destination address of first IP messages is set to the IP address of first base station（Because roaming place gateway is first base station by the Check base stations for looking for UEBS tables to know that UE is currently resident）Afterwards, the first IP messages are sent to by first base station by transmitter 11, and keep the route of the first IP messages constant.

First base station is after the first IP messages are received（Now the destination address of the first IP messages is the IP address of first base station）, the destination address for judging the first IP messages is the identifier that UE is carried in the IP address of itself, and the route head of the message, then first base station knows that the first IP messages are destined to UE's.The destination address of first IP messages is set to UE identifier by first base station.Finally, the first IP messages are sent to UE by first base station.

Mobile gateway provided in an embodiment of the present invention, by receiver reception transmission for indicating mobile gateway by the first message of the first IP message routings to the first routing node received, processor generates UENH list items according to the first message, and UENH list items are looked for by the identifier Check of the UE in the first IP messages, obtain Check and look for result, finally cause transmitter to look for result by the first IP message routings to the first routing node received according to the Check.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.In addition, mobile gateway provided in an embodiment of the present invention, it is also possible that when target device is communicated with the UE in the network of roaming place, it is not necessary to which the message that target device can also be sent to UE by local gateway is accurately forwarded to UE, saves the expense of system.

The embodiment of the present invention one provides a kind of radio network controller, and the radio network controller includes：Transmitter, for sending first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

Specifically, UE starts shooting when being resident mobile communications network first every time, set up RRC with base station first and be connected, UE carries out the connection of Non-Access Stratum, i.e. NAS attachment afterwards.After adhering to successfully, the mobile communications network can distribute an IP address for UE（That is UE identifier）.

After UE is attached to network, it is attached to after SNC, the transmitter for triggering SNC sends first message to the first mobile gateway, the first message is used to indicate the first mobile gateway by the first IP message routings to the first routing node received, wherein, the first IP messages include UE identifier（It is i.e. above-mentioned UIP) it should be noted that UE identifier can be located at the first IP messages route head in or the first IP messages destination address, it is necessary to depending on different situations.

For example, when target device is communicated with UE, UE can according to traditional routing forwarding scheme to target device send uplink message, that is the base station that the uplink message that UE is sent is resident through UE reaches the mobile gateway for the network that UE is resident, and is then sent by mobile gateway the uplink message being sent to target device.When target device sends downlink message to UE, if UE is currently without roaming, that is UE-be directly in home network or switched between the base station of home network, then target device can send downlink message to the local gateway of the home network where UE, and the downlink message is transmitted into UE by local gateway;If UE currently roams into roaming place network from home network, according to IP route technology principles, all downlink messages for issuing UE should also be sent to the local gateway of UE home network first, again by local gateway forwards to UE, but it is due to UE now just in roaming place, local gateway should first issue downlink message roaming place gateway, then the base station uNB by roaming place gateway forwards to the UE roaming places being currently resident, and UE is relayed to by base station.Assuming that the first mobile gateway referred in the embodiment of the present invention is the local gateway in Fig. 1, then the first IP messages are exactly the downlink message that target device is sent to the local gateway, and the destination address of the first IP messages is exactly UE identifier；Assuming that the first mobile gateway referred in the embodiment of the present invention is the roaming place gateway in Fig. 1, then the first IP messages can be that the downlink message that local gateway sends target device is transmitted to the identifier that UE is carried in the downlink message of roaming place gateway, the route head of the first IP messages after treatment.

§ Jie, for the gateway of local, the first IP messages are exactly the message that the target device received is sent to local gateway；For the gateway of roaming place, the first IP messages are exactly the message that local gateway is sent to roaming place gateway.Also, no matter the first mobile gateway mentioned by the embodiment of the present invention is to include UE identifier in local gateway or roaming place gateway, its first IP message received.

First mobile gateway receives the first message that SNC is sent, can be according to the first message by the first IP message routings to the first routing node received.As shown in above-mentioned example, as UE-be directly in home network or when being switched between the base station of home network, then target device can send the first IP messages to the first mobile gateway（The destination address of first IP messages is UE identifier）, then it is exactly local gateway that the first mobile gateway here, which is,；So, here the first routing node can think the base station that UE is resident in home network, so that the base station that the first IP message routings are resident by the first mobile gateway according to the first message to UE, so that the first IP messages are transmitted to UE by the base station, the communication between target device and UE is completed.If UE currently roams into roaming place network, target device meeting from home network First by the downlink message of transmission（The destination address of the downlink message is UE identifier）It is sent to local gateway, for the gateway of local, the downlink message is still the first IP messages, so SNC can indicate local gateway when UE roams into roaming place, it is that the downlink message of UE identifier is first forwarded to the roaming place gateway of roaming place by the destination address received, i.e., it is exactly roaming place gateway that the first routing node here, which is,;When roaming place gateway receives the message that local gateway is sent, the message is also the first IP messages for roaming place gateway, SNC indicates that the first IP messages of the local gateway received are sent to the base station in the roaming place network that UE is currently resident by roaming place gateway, the first IP messages are issued into UE by the base station in the network of roaming place, target device and UE communication is completed.Therefore, for the gateway of roaming place, the first routing node here is by base station resident UE in the network of roaming place.

In summary, what the first IP messages can be with the first mobile gateway role is different and different, and what the first routing node being related in the first message that SNC transmitter is sent also can be with mobile gateway role is different and different.But, no matter the role of the first mobile gateway is local gateway or roaming place gateway, the present embodiments relate to the first mobile gateway the first IP messages received can be sent to UE, complete the routing forwarding of the first IP messages.

Radio Network Controller provided in an embodiment of the present invention, transmitter to the first mobile gateway by sending for indicating the first mobile gateway by the first message of the first IP message routings to the first routing node received so that the first mobile gateway is according to the first message by the first IP message routings to the first routing node received.Radio Network Controller provided in an embodiment of the present invention, when the first message sent by transmitter is so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, Radio Network Controller provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.The structural representation of the embodiment three for the mobile gateway that Fig. 4 provides for the present invention.As shown in figure 4, the mobile gateway includes：The sending module 21 of receiving module 20 and first.Wherein, receiving module 20, the first message for receiving SNC transmissions；Wherein, the first message is used to indicate the mobile gateway by the first IP message routings to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；First sending module 21, for according to the first message by the first IP message routings received to first routing node.

Specifically, UE starts shooting when being resident mobile communications network first every time, set up wireless with base station first Resources control（Radio Resource Control, hereinafter referred to as RRC) connection, the connection of the Non-Access Stratum of UE progress afterwards, i.e. Non-Access Stratum（Non-access Stratum, hereinafter referred to as NAS) network attachment.After adhering to successfully, the mobile communications network can distribute an IP address for UE（That is UE identifier）.

After UE is attached to network, it is attached to after SNC, triggering SNC sends first message to mobile gateway, the first message is used to indicate the mobile gateway by the first IP message routings to the first routing node received, wherein, the first IP messages include UE identifier（I.e. above-mentioned UIP).It should be noted that UE identifier can be located at the first IP messages route head in or the first IP messages destination address, it is necessary to depending on different situations.

For example, when target device is communicated with UE, UE can according to traditional routing forwarding scheme to target device send uplink message, that is the base station that the uplink message that UE is sent is resident through UE reaches the mobile gateway for the network that UE is resident, and the uplink message then is sent into target device by mobile gateway.When target device sends downlink message to UE, if UE is currently without roaming, that is UE-be directly in home network or switched between the base station of home network, then target device can send downlink message to the local gateway of the home network where UE, and the downlink message is transmitted into UE by local gateway;If UE currently roams into roaming place network from home network, according to IP route technology principles, all downlink messages for issuing UE should also be sent to the local gateway of UE home network first, again by local gateway forwards to UE, but it is due to UE now just in roaming place, local gateway should first issue downlink message roaming place gateway, then the base station by roaming place gateway forwards to the UE roaming places being currently resident, and UE is relayed to by base station.Assuming that the mobile gateway referred in the embodiment of the present invention is the local gateway in Fig. 1, then the first IP messages are exactly the downlink message that target device is sent to the local gateway, and the destination address of the first IP messages is exactly UE identifier;Assuming that the mobile gateway referred in the embodiment of the present invention is the roaming place gateway in Fig. 1, then the first IP messages can be that the downlink message that local gateway sends target device is transmitted to the identifier that UE is carried in the downlink message of roaming place gateway, the route head of the first IP messages after treatment.SP, for the gateway of local, the first IP messages are exactly the message that the target device received is sent to local gateway；For the gateway of roaming place, the first IP messages are exactly the message that local gateway is sent to roaming place gateway.Also, no matter the mobile gateway mentioned by the embodiment of the present invention is to include UE identifier in local gateway or roaming place gateway, its first IP message received.

Receiving module 20 receives the first message that SNC is sent, and the first sending module 21 can be according to the first message by the first IP message routings to the first routing node received.As shown in above-mentioned example, work as UE When being constantly in home network or being switched between the base station of home network, then target device can send the first IP messages to mobile gateway（The destination address of first IP messages is UE identifier）, then it is exactly local gateway that mobile gateway here, which is,；So, here the first routing node can think the base station that UE is resident in home network, so that the base station that the first IP message routings are resident by the first sending module 21 according to the first message to UE, so that the first IP messages are transmitted to UE by the base station, the communication between target device and UE is completed.If UE currently roams into roaming place network from home network, target device can be first by the downlink message of transmission（The destination address of the downlink message is UE identifier）It is sent to local gateway, for the gateway of local, the downlink message is still the first IP messages, so SNC can indicate local gateway when UE roams into roaming place, it is that the downlink message of UE identifier is first forwarded to the roaming place gateway of roaming place by the destination address received, i.e., it is exactly roaming place gateway that the first routing node here, which is,；When roaming place gateway receives the message that local gateway is sent, the message is also the first IP messages for roaming place gateway, SNC indicates that the first IP messages of the local gateway received are sent to the base station in the roaming place network that UE is currently resident by roaming place gateway, the first IP messages are issued into UE by the base station in the network of roaming place, target device and UE communication is completed.Therefore, for the gateway of roaming place, the first routing node here is by base station resident UE in the network of roaming place.

Mobile gateway provided in an embodiment of the present invention, receiving being used for of sending by receiving module indicates mobile gateway by the first message of the first Internet protocol IP message routing to the first routing node received so that the first sending module is according to the first message by the first IP message routings to the first routing node received.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.

The structural representation of the example IV for the mobile gateway that Fig. 5 provides for the present invention.On the basis of above-mentioned embodiment illustrated in fig. 4, Jin mono- Walk, the mobile gateway also includes：Generation module 22, for generating the next tiny node UENH list items of mobile terminal according to the first message；Wherein, the UENH The corresponding relation list item of identifier and the identifier of first routing node that list item is the UE.Specifically, after SNC sends first message to mobile gateway, optionally, the identifier between UE identifier and the first routing node can be included in the first message.First sending module 21 of mobile gateway can be directly according to the first message by the first IP message routings to the first routing node received, optionally, the generation module 22 of mobile gateway can also be after receiving module 20 receives the first message, UENH list items are generated according to the first message, are stored in mobile gateway；Wherein, the UENH list items are UE identifier and the corresponding relation list item of the identifier of the first routing node.When the receiving module 20 of mobile gateway receives the first IP messages of network equipment transmission, generation module 22 can look for UENH tables according to the identifier Check of the UE in the first IP messages, obtain Check and look for result, the UENH tables include above-mentioned UENH list items.

Optionally, the above-mentioned network equipment can also be the target device communicated with UE according to the different and different of mobile gateway role, the i.e. network equipment, can also be local gateway.When mobile gateway is local gateway, the network equipment is target device；When mobile gateway is roaming place gateway, the network equipment is local gateway.

Jin mono- Walk, above-mentioned UENH tables are mobile terminal base station（UE Basic Station, hereinafter referred to as

UEBS) table or mobile-terminal gateway（UE Gateway, hereinafter referred to as UEGW) table.Optionally, above-mentioned generation module 22, can generate UEBS list items according to the first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEBS list items are UE, here the first routing node is first base station, and the identifier of the first routing node is the IP address of first base station, and the first base station is by base station currently resident UE（If UE is currently resident in home network, the first base station is exactly the base station in home network；If UE is currently resident in the network of roaming place, the first base station is the base station in the network of roaming place）；Optionally, above-mentioned generation module 22, can also generate UEGW list items according to first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEGW list items are UE, here the first routing node is the second mobile gateway, the identifier of first routing node is the IP address of the second mobile gateway, and the network where second mobile gateway is by network currently resident UE.

The structural representation of the embodiment five for the mobile gateway that Fig. 6 provides for the present invention.On the basis of above-mentioned embodiment illustrated in fig. 5, Jin mono- Walk, first sending module 21 is specifically included：Receiving unit 211, the first IP messages for receiving network equipment transmission；Check looks for unit 212, and the identifier Check for the UE in the first IP messages looks for UENH tables, obtains Check and looks for result；Wherein, it is described UENH tables include the UENH list items；Generation unit 213, for looking for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；Transmitting element 214, for the 2nd IP messages to be sent to first routing node.

Specifically, after SNC sends first message to mobile gateway, optionally, the identifier between UE identifier and the first routing node can be included in the first message.First sending module 21 of mobile gateway can be directly according to the first message by the first IP message routings to the first routing node received, optionally, the generation module 22 of mobile gateway can also be after receiving module 20 receives the first message, UENH list items are generated according to the first message, are stored in mobile gateway.

After receiving unit 211 receives the first IP messages of network equipment transmission, Check looks for the UENH tables that UE of the unit 212 in the first IP messages identifier Check looks for generation module 22 to be generated, and obtains Check and looks for result；Afterwards, generation unit 213 looks for result to generate the 2nd IP messages according to the Check, and the destination address of the 2nd IP messages is the identifier of the first routing node, and the route head of the second message includes UE identifier；Finally, the 2nd IP messages are sent to the first routing node by transmitting element 214.Need exist for explanation be, although transmitting element 214 is that the 2nd IP messages have been sent into the first routing node here, but the content included by the data content and the first IP messages included by actually the 2nd IP messages is identical, simply the destination address of the 2nd IP messages is different from the destination address of the first IP messages, and includes UE identifier in the route head of the 2nd IP messages.

On the basis of above-described embodiment five, it is used as a kind of possible embodiment of the embodiment of the present invention, the present embodiment, which refers to Check, to be looked for UE of the unit 212 in the first IP messages identifier Check to look for UENH list items to obtain Check looking for result, and looks for result to generate the detailed processes of the 2nd IP messages according to Check.Jin mono- Walk, the Check looks for unit 212, judges to operate specifically for performing first, obtains the first judged result；Wherein, described first judges that operation includes：The Check looks for unit 212 to judge whether the destination address of the first IP messages is identical with the host address of the mobile gateway, and judges whether the route heads of the first IP messages is empty；And the identifier Check of the UE in first judged result and the first IP messages looks for the UENH tables, obtain Check and look for result.

Specifically, when receiving unit 211 receives the first IP messages of network equipment transmission, Check looks for unit 212 to judge whether identical the destination address of the first IP messages is with the host address of the mobile gateway, and the first the route heads of IP messages whether be empty, obtain the first judged result.

When mobile gateway is roaming place gateway, i.e. the Check of roaming place gateway looks for unit 212 to be received at it Unit 211 receives local gateway（Local gateway now is the network equipment for sending the first IP messages）It after the first IP messages sent, can judge whether the destination address of the first IP messages is identical with the host address of roaming place gateway, and judge whether the routes of the first IP messages is sky.Accordingly, the first judged result that roaming place gateway is obtained is that the destination address of the first IP messages is identical with the host address of roaming place gateway, and the first IP messages route head for sky, then the Check in the gateway of roaming place looks for the UEBS list items that unit 212 will be looked for according to the identifier Check of the UE in the first IP messages in the UEBS tables generated before generation module 22, obtains corresponding Check and looks for result（If the first judged result differs for the host address of the destination address and roaming place gateway of the first IP messages, roaming place gateway may abandon the message）.When the Check looks for result to look for the success of UEBS list items for above-mentioned roaming place gateway Check, then the generation unit 213 in the gateway of roaming place determines that first routing node is first base station（The base station that the first base station is resident by UE in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of first base station, generate the 2nd IP messages；Now the route head of the 2nd IP messages includes UE identifier（Because the route head of the first IP messages is not sky before this, i.e. UE identifier is included in the route head of the first IP messages, generation unit 213 is changed the destination address of the first IP messages）.

Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitting element 214.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

When mobile gateway is local gateway, that is the Check of local gateway looks for unit 212 after the first IP messages that its receiving unit 211 receives target device transmission, it can judge whether the destination address of the first IP messages is identical with the host address of local gateway, and judge that whether the route heads of the first IP messages is empty, obtains the first judged result.For the gateway of local, the first judged result can have two kinds of situations：

The first：When the first judged result is identical with the host address of local gateway for the destination address of the first IP messages, and the first IP messages route head for sky, then the Check in the gateway of local looks for the UEBS list items that unit 212 will be looked for according to the identifier Check of the UE in the first IP messages in the UEBS tables generated before generation module 22, obtains corresponding Check and looks for result；When the Check looks for result to be above-mentioned local Gateway Check looks for the success of UEBS list items（Illustrate that now UE is not roamed, and be resident in the first base station in home network）, then the generation unit 213 in the gateway of local determines that first routing node is first base station, and the destination address of the first IP messages is changed into the IP address of first base station, generates the 2nd IP messages；Now the route head of the 2nd IP messages includes UE identifier.Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitting element 214.

First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

Second：When the first judged result differs for the destination address of the first IP messages with the host address of local gateway, the Check in the gateway of local looks for unit 212 to do following processing.

Specifically, the Check in the gateway of local, which looks for unit 212 to enter a Walk, judges whether the destination address of the first IP messages is identical with the network address of local gateway, the second judged result is obtained.For the gateway of local, the second judged result can have two kinds of situations of A and B：

A:If the second judged result is identical with the network address of local gateway for the destination address of the first IP messages, Check looks for the UEBS list items that UE of the unit 212 in the first IP messages identifier Check is looked in UEBS tables, obtains corresponding Check and looks for result.It can be divided into following（A), (b) two kinds of situations：

( a) :When Check looks for result to look for UE of the unit 212 in above-mentioned first IP messages identifier Check to look for the success of UEBS list items for Check（Illustrate that now UE is not roamed, and be resident in the first base station in home network）, then generation unit 213 determines that the first routing node is first base station, and the destination address of the first IP messages is changed into the IP address of first base station, generates the 2nd IP messages, and UE identifier is added in the route of the 2nd IP messages head.Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitting element 214.

First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages be sent to UE。

( b )：When Check looks for result to look for UE of the unit 212 in above-mentioned first IP messages identifier Check to look for UEBS list items unsuccessful for Check（Illustrate that now UE is not in home network, but roaming place network may have been had roamed to）, generation module 22 can be when the UE for receiving SNC transmissions leaves the message of home network, route table items related deletion Home Network Central Shanxi Plain UE（That is UEBS list items）.Then Check looks for the UEGW list items that UE of the unit 212 in above-mentioned first IP messages identifier Check is looked in UEGW tables.If Check looks for UE of the unit 212 in the first IP messages identifier Check to look for UEGW list items still unsuccessful, transmitting element 214 forwards the message according to traditional method for routing or abandons the message；If Check looks for UE of the unit 212 in the first IP messages identifier Check to look for the success of UEGW list items, generation unit 213 determines that the first routing node is the second mobile gateway（Second mobile gateway is the roaming place gateway in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of the second mobile gateway, generates the 2nd IP messages, and by UE identifier added in the route head of the 2nd IP messages.

Finally, the 2nd IP messages are sent to the second mobile gateway by transmitting element 214；Second mobile gateway is after the 2nd IP messages are received, above-mentioned first can equally be performed and judge operation, judge whether the destination address of the 2nd IP messages is identical with the host address of the second mobile gateway, and judge whether the route heads of the 2nd IP messages is empty.But, because the second mobile gateway is currently the gateway of roaming place, and the 2nd IP messages destination address be exactly the second mobile gateway IP address, and the 2nd IP messages route head in carry UE identifier, therefore, the first judged result that second mobile gateway is obtained is identical with the host address of the second mobile gateway for the destination address of the 2nd IP messages, and the 2nd the route heads of IP messages be not sky, then the second mobile gateway also can the UEBS list items looked in the UEBS tables on the second mobile gateway of Check（This UEBS list item is also that the first message that is sent according to SNC of the second mobile gateway is generated）If the second mobile gateway Check looks for UEBS list items success, the second mobile gateway determines that the first routing node is first base station, and the first base station is the base station in the network of roaming place, and the 2nd IP messages are sent to first base station by the second mobile gateway.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE. B:Differed if the second judged result is the destination address of the first IP messages and the network address of local gateway（Illustrate that now UE is not in home network, but roaming place network may have been had roamed to）, then Check look for the UEGW list items that UE of the unit 212 in the first IP messages identifier Check is looked in UEGW tables, obtain corresponding Check and look for result.If Check looks for UE of the unit 212 in the first IP messages identifier Check to look for UEGW list items unsuccessful, transmitting element 214 forwards the message according to traditional method for routing or abandons the message；If Check looks for UE of the unit 212 in the first IP messages identifier Check to look for the success of UEGW list items, generation unit 213 determines that the second mobile gateway is the first routing node（Second mobile gateway is the roaming place gateway in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of the second mobile gateway, generates the 2nd IP messages, and by UE identifier added in the route head of the 2nd IP messages.

Finally, the 2nd IP messages are sent to the second mobile gateway by transmitting element 214；Second mobile gateway is after the 2nd IP messages are received, above-mentioned first can equally be performed and judge operation, judge whether the destination address of the 2nd IP messages is identical with the host address of the second mobile gateway, and judge whether the route heads of the 2nd IP messages is empty.But, because the second mobile gateway is currently the gateway of roaming place, and the 2nd IP messages destination address be exactly the second mobile gateway IP address, and the 2nd IP messages route head in carry UE identifier, therefore, the first judged result that second mobile gateway is obtained is identical with the host address of the second mobile gateway for the destination address of the 2nd IP messages, and the 2nd the route heads of IP messages be not sky, then the second mobile gateway also can the UEBS list items looked in the UEBS tables on the second mobile gateway of Check（This UEBS list item is also that the first message that is sent according to SNC of the second mobile gateway is generated）If the second mobile gateway Check looks for UEBS list items success, the second mobile gateway determines that the first routing node is first base station, and the first base station is the base station in the network of roaming place, and the 2nd IP messages are sent to first base station by the second mobile gateway.First base station is after the 2nd IP messages are received, the destination for judging the 2nd IP messages is the IP address of itself, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of the 2nd IP messages can be changed to UE identifier by first base station, and the route head of the 2nd IP messages is emptied, that is, be reduced into original target device and be sent to UE message originally, so that the first IP messages are sent into UE.

Mobile gateway provided in an embodiment of the present invention, by receiving module reception transmission for indicating mobile gateway by the first message of the first IP message routings to the first routing node received, generation module generates UENH list items according to the first message, and is looked for by the identifier Check of the UE in the first IP messages UENH list items, obtain Check and look for result, finally cause the first sending module to look for result by the first IP message routings to the first routing node received according to the Check.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.

The structural representation of the embodiment six for the mobile gateway that Fig. 7 provides for the present invention.On the basis of above-mentioned embodiment illustrated in fig. 6, Jin mono- Walk, above-mentioned mobile gateway also includes：Logging modle 23, for when the receiving module 20 receives the 3rd IP messages that the UE is sent by the first base station, by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；Setup module 24, the new source address for the IP address of the mobile gateway to be set to the 3rd IP messages；Second sending module 25, the 3rd IP messages for setup module 24 to be obtained are sent to the target device with the UE communication, so that the first IP messages are sent to the mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of the mobile gateway.

Specifically, when UE is attached to the SNC of roaming place network, SNC can indicate that UE is currently resident in the first base station in the network of roaming place to roaming place gateway.As described in above-mentioned embodiment, roaming place gateway can be after the first IP messages be received, the Check of the roaming place gateway looks for unit 212 to judge that the destination address of the first IP messages is identical with the host address of roaming place gateway, and the first IP messages route head for sky, then Check looks for the UEBS list items that UE of the meeting of unit 212 in the first IP messages identifier Check is looked in the UEBS tables generated before generation module 22, obtains corresponding Check and looks for result.When the Check looks for result to look for the success of UEBS list items for above-mentioned roaming place gateway Check, then the generation unit 213 in the gateway of roaming place determines that first routing node is first base station（The base station that the first base station is resident by UE in the network of roaming place）, and the destination address of the first IP messages is changed to the IP address of first base station, generate the 2nd IP messages；Now the route head of the 2nd IP messages includes UE identifier（Because the route head of the first IP messages is not sky before this, i.e. UE identifier is included in the route head of the first IP messages, generation unit 213 is simply changed the destination address of the first IP messages）.

Finally, the 2nd IP messages are sent to the resident first base stations of UE by transmitting element 214.First base station is after the 2nd IP messages are received, and the destination for judging the 2nd IP messages is itself IP address, and know the identifier that UE is carried in the route head of the 2nd IP messages, so that first base station knows that the 2nd IP messages are destined to UE's；Therefore, the destination address of 2nd IP messages can be changed to UE identifier by first base station, and know that the 2nd IP messages are to be sent to first base station from roaming place gateway, therefore first base station can empty the route head of the 2nd IP messages, it is reduced into original target device and is sent to UE message originally, so that the first IP messages is sent into UE.

UE in the network of roaming place is intended to send the 3rd IP messages to target device, general, 3rd IP messages are sent to first base station by UE first, 3rd IP messages are sent roaming place gateway by first base station according to traditional routing mode, and the source address of the 3rd IP messages is UE identifier.After roaming place gateway receives the 3rd IP messages of first base station forwarding, can by setup module 24 by the source address modification of the 3rd IP messages be the IP address of itself, the original source address of the 3rd IP messages is recorded in the route head of the 3rd IP messages by logging modle 23, that is now the source address of the 3rd IP messages is the IP address of roaming place gateway, and the route head of the 3rd IP messages includes UE identifier.Afterwards, the 3rd IP messages are sent to target device by roaming place gateway by the second sending module 25.

Roaming place gateway is after the first IP messages are received, unit 212 is looked for judge that the destination address of the first IP messages is the IP address of itself by Check, and include UE identifier in the route head of the message, thus being aware of the first IP messages is destined to UE, therefore the destination address of the first IP messages is set to the IP address of first base station by generation unit 213（Because roaming place gateway is first base station by the Check base stations for looking for UEBS tables to know that UE is currently resident）Afterwards, the first IP messages are sent to by first base station by transmitting element 214, and keep the route of the first IP messages constant.

First base station is after the first IP messages are received（Now the destination address of the first IP messages is The IP address of one base station）, the destination address for judging the first IP messages is the identifier that UE is carried in the IP address of itself, and the route head of the message, then first base station knows that the first IP messages are destined to UE's.The destination address of first IP messages is set to UE identifier by first base station.Finally, the first IP messages are sent to UE by first base station.

Mobile gateway provided in an embodiment of the present invention, by receiving module reception transmission for indicating mobile gateway by the first message of the first IP message routings to the first routing node received, generation module generates UENH list items according to the first message, and UENH list items are looked for by the identifier Check of the UE in the first IP messages, obtain Check and look for result, finally cause the first sending module to look for result by the first IP message routings to the first routing node received according to the Check.Mobile gateway provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, mobile gateway provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.In addition, mobile gateway provided in an embodiment of the present invention, it is also possible that when target device is communicated with the UE in the network of roaming place, it is not necessary to which the message that target device can also be sent to UE by local gateway is accurately forwarded to UE, saves the expense of system.

The embodiment of the present invention two provides a kind of radio network controller.The radio network controller includes：Sending module, for sending first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first IP message routings to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

After UE is attached to network, it is attached to after SNC, the sending module for triggering SNC sends first message to the first mobile gateway, the first message is used to indicate the first mobile gateway by the first IP message routings to the first routing node received, wherein, the first IP messages include UE identifier（I.e. above-mentioned UIP) it should be noted that UE identifier can be located at the first IP messages route head in or the first IP messages destination address, it is necessary to depending on different situations.

For example, when target device is communicated with UE, UE can be according to traditional routing forwarding scheme to target device transmission uplink message, i.e. the uplink message that UE is sent reaches UE institutes through the UE base stations being resident The mobile gateway of resident network, is then sent by mobile gateway the uplink message being sent to target device.When target device sends downlink message to UE, if UE is currently without roaming, that is UE-be directly in home network or switched between the base station of home network, then target device can send downlink message to the local gateway of the home network where UE, and the downlink message is transmitted into UE by local gateway;If UE currently roams into roaming place network from home network, according to IP route technology principles, all downlink messages for issuing UE should also be sent to the local gateway of UE home network first, again by local gateway forwards to UE, but it is due to UE now just in roaming place, local gateway should first issue downlink message roaming place gateway, then the base station uNB by roaming place gateway forwards to the UE roaming places being currently resident, and UE is relayed to by base station.Assuming that the first mobile gateway referred in the embodiment of the present invention is the local gateway in Fig. 1, then the first IP messages are exactly the downlink message that target device is sent to the local gateway, and the destination address of the first IP messages is exactly UE identifier；Assuming that the first mobile gateway referred in the embodiment of the present invention is the roaming place gateway in Fig. 1, the IP messages of shellfish ij the first can be that the downlink message that local gateway sends target device is transmitted to the identifier that UE is carried in the downlink message of roaming place gateway, the route head of the first IP messages after treatment.

SP, for the gateway of local, the first IP messages are exactly the message that the target device received is sent to local gateway；For the gateway of roaming place, the first IP messages are exactly the message that local gateway is sent to roaming place gateway.Also, no matter the first mobile gateway mentioned by the embodiment of the present invention is to include UE identifier in local gateway or roaming place gateway, its first IP message received.

First mobile gateway receives the first message that SNC is sent, can be according to the first message by the first IP message routings to the first routing node received.As shown in above-mentioned example, as UE-be directly in home network or when being switched between the base station of home network, then target device can send the first IP messages to the first mobile gateway（The destination address of first IP messages is UE identifier）, then it is exactly local gateway that the first mobile gateway here, which is,；So, here the first routing node can think the base station that UE is resident in home network, so that the base station that the first IP message routings are resident by the first mobile gateway according to the first message to UE, so that the first IP messages are transmitted to UE by the base station, the communication between target device and UE is completed.If UE currently roams into roaming place network from home network, target device can be first by the downlink message of transmission（The destination address of the downlink message is UE identifier）It is sent to local gateway, for the gateway of local, the downlink message is still the first IP messages, so SNC can indicate local gateway when UE roams into roaming place, it is that the downlink message of UE identifier is first forwarded to the roaming place gateway of roaming place by the destination address received, i.e., it is exactly roaming place gateway that the first routing node here, which is,; When roaming place gateway receives the message that local gateway is sent, the message is also first for roaming place gateway

IP messages, SNC indicates that the first IP messages of the local gateway received are sent to the base station in the roaming place network that UE is currently resident by roaming place gateway, the first IP messages are issued into UE by the base station in the network of roaming place, target device and UE communication is completed.Therefore, for the gateway of roaming place, the first routing node here is by base station resident UE in the network of roaming place.

In summary, what the first IP messages can be with the first mobile gateway role is different and different, and what the first routing node being related in the first message that SNC sending module is sent also can be with mobile gateway role is different and different.But, no matter the role of the first mobile gateway is local gateway or roaming place gateway, the present embodiments relate to the first mobile gateway the first IP messages received can be sent to UE, complete the routing forwarding of the first IP messages.

Radio Network Controller provided in an embodiment of the present invention, sending module to the first mobile gateway by sending for indicating the first mobile gateway by the first message of the first IP message routings to the first routing node received so that the first mobile gateway is according to the first message by the first IP message routings to the first routing node received.Radio Network Controller provided in an embodiment of the present invention, when the first message sent by sending module is so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;Also, Radio Network Controller provided in an embodiment of the present invention so that UE can facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.The schematic flow sheet of the retransmission method embodiment one for the internet protocol message that Fig. 8 provides for the present invention.The first mobile gateway in this method can be the mobile gateway in above-described embodiment.As shown in figure 8, this method includes：

S101:First mobile gateway receives the first message that SNC is sent；Wherein, the first message is used to indicate first mobile gateway by the first IP message routings to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

S102:First mobile gateway is according to the first message by the first IP message routings received to first routing node.

The retransmission method of internet protocol message provided in an embodiment of the present invention can perform the embodiment of above-mentioned mobile gateway, and its implementing principle and technical effect is similar, will not be repeated here.

The flow signal of the retransmission method embodiment two for the internet protocol message that Fig. 9 provides for the present invention Figure.On the basis of above-mentioned embodiment illustrated in fig. 8, Jin mono- Walk, after S101, before S102, this method also includes：

S201 :First mobile gateway generates UENH list items according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

Jin mono- Walk, the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, then S201 is specifically included：First mobile gateway generates UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE；Or, first mobile gateway according to the first message generate UEGW list items；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEGW list items are the UE, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

The schematic flow sheet of the retransmission method embodiment three for the internet protocol message that Figure 10 provides for the present invention.With entering a Walk, above-mentioned S102 can be specifically included as lower Walk is rapid with wrapping：

S301 :First mobile gateway receives the first IP messages that the network equipment is sent.

S302 :The UE of first mobile gateway in the first IP messages identifier Check looks for UENH tables, obtains Check and looks for result；Wherein, the UENH tables include the UENH list items.

S303:First mobile gateway looks for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE.

S304:First mobile gateway sends the 2nd IP messages to first routing node.

Jin mono- Walk, above-mentioned S302 can include：First mobile gateway performs first and judges operation, obtains the first judged result；Wherein, described first judges that operation includes：First mobile gateway judges whether the destination address of the first IP messages is identical with the host address of first mobile gateway, and judges whether the route heads of the first IP messages is empty；The UE of first mobile gateway in first judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result. Optionally, above-mentioned S302, can include：If first judged result is identical with the host address of first mobile gateway for the destination address of the first IP messages, and the route head of the first IP messages is not sky, the UEBS list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEBS tables, obtain the Check and look for result.

Then above-mentioned S303, is specifically included：If the Check looks for result to look for the UEBS list items success for the first mobile gateway Check, then first mobile gateway determines that first routing node is the first base station, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages.Then above-mentioned S304, is specifically included：First mobile gateway sends the 2nd IP messages to the first base station.

Optionally, above-mentioned S302, can also include：Differed if first judged result is the destination address of the first IP messages and the host address of first mobile gateway, then first mobile gateway judges whether the destination address of the first IP messages is identical with the network address of first mobile gateway, obtains the second judged result；The UE of first mobile gateway in second judged result and the first IP messages identifier Check looks for the UENH tables, obtains the Check and looks for result.

Geng Jin mono- Walk, above-mentioned S302 can include：If second judged result is identical with the network address of first mobile gateway for the destination address of the first IP messages, the UEBS list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEBS tables, obtain the Check and look for result.

Then above-mentioned S303 is specifically included：If the identifier Check that the Check looks for result to be the UE of first mobile gateway in the first IP messages looks for the UEBS list items success, then first mobile gateway determines that first routing node is the first base station, and the destination address of the first IP messages is changed to the IP address of the first base station, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head.Then above-mentioned S304 is specifically included：First mobile gateway sends the 2nd IP messages to the first base station.

Above-mentioned S303 can also include：If the Check looks for result to look for described for the first mobile gateway Check

UEBS list items are unsuccessful, then the UEGW list items that the UE of first mobile gateway in the first IP messages identifier Check is looked in the UEGW tables；If the UE of first mobile gateway in the first IP messages identifier Check looks for the UEGW list items success, then first mobile gateway determines that second mobile gateway is first routing node, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, generate the 2nd IP Message, and the identifier of the UE is added in the route of the 2nd IP messages head.Then above-mentioned S304, can also include：First mobile gateway sends the 2nd IP messages to second mobile gateway, judges to operate so that second mobile gateway performs described first as the first new mobile gateway.

Geng Jin mono- Walk, above-mentioned S302 can also include：If second judged result is described first

The network address of the destination address of IP messages and first mobile gateway is differed, then the UEGW list items that the UE of first mobile gateway in the first IP messages identifier Check is looked in the UEGW corresponding tables, is obtained Check and is looked for result.

Then above-mentioned S303, can also include：If the identifier Check that the Check looks for result to be the UE of first mobile gateway in the first IP messages looks for the UEGW list items success, then first mobile gateway determines that second mobile gateway is first routing node, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head.Above-mentioned S304 can also include：First mobile gateway sends the 2nd IP messages to second mobile gateway, judges to operate so that second mobile gateway performs described first as the first new mobile gateway.

The schematic flow sheet of the retransmission method example IV for the internet protocol message that Figure 11 provides for the present invention.The UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, and first mobile gateway is the mobile gateway of the current roaming networks of the UE.Then on the basis of above-mentioned embodiment illustrated in fig. 9, Jin mono- Walk, after above-mentioned S102, this method also includes：

S401:First mobile gateway is when receiving the 3rd IP messages that the UE is sent by the first base station, and first mobile gateway is by the source address record of the 3rd IP messages in the route head of the 3rd IP messages.

S402 :The IP address of first mobile gateway is set to the new source address of the 3rd IP messages by the first mobile gateway.

S403 :3rd IP messages are sent to the target device with the UE communication by the first mobile gateway, so that the first IP messages are sent to first mobile gateway, the first IP reports by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages The destination address of text is the IP address of first mobile gateway.

The embodiment of the present invention five provides a kind of retransmission method of internet protocol message, and the executive agent of this method is the radio network controller in above-described embodiment.This method includes：SNC sends first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first IP message routings to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

The retransmission method of internet protocol message provided in an embodiment of the present invention can perform the embodiment of above-mentioned radio network controller, and its implementing principle and technical effect is similar, will not be repeated here.The signaling process figure of the retransmission method embodiment five for the internet protocol message that Figure 12 provides for the present invention.When the present embodiment refers to UE and switched between the base station of home network, the detailed process that target device is communicated with UE.In the present embodiment, the first mobile gateway is local gateway, the base station that first base station is resident by UE in home network.As shown in figure 12, this method includes：

S501:SNC knows the resident networks of UE and first base station.

Specifically, UE starts shooting when being resident mobile communications network first every time, set up RRC with first base station first and be connected, UE carries out the connection of Non-Access Stratum, i.e. NAS attachment afterwards.After adhering to successfully（That is UE has been attached on the SNC in the mobile communications network）, the mobile communications network can be UE one IP address of distribution（That is UE identifier）, SNC is so as to know that the base station that UE is resident is first base station, it is also known that the IP address of first base station.

S502:SNC sends first message to local gateway, and the first message is used to indicate that the first IP messages by the destination address received for UE identifier are sent to first base station to local gateway.

S503:Local gateway generates UEBS list items according to the first message, identifier and the corresponding relation list item of the IP address of first base station that the UEBS list items are UE.

S504:Target device sends the first IP messages to local gateway, and the destination address of the first IP messages is UE identifier.

S505:Local gateway judges that the destination address of the first IP messages is different from the host address of local gateway, but the destination address of the first IP messages is identical with the network address of local gateway, then gateway Check in local is looked for after the UEBS list items success in the UEBS tables previously generated, the destination address of first IP messages is changed to the IP address of first base station, generate the 2nd IP messages, and by the mark of the UE in the first IP messages Symbol is filled into the route of the 2nd IP messages head.

S506:2nd IP messages are sent to first base station by local gateway.

S507:First base station judges that the destination address of the 2nd IP messages is the IP address of itself, and the 2nd IP messages route head in carry UE identifier, then the destination address of the 2nd IP messages is reduced into UE identifier by first base station, and the content in route head is emptied, obtain the first initial IP messages.

Specifically, first base station is after the 2nd IP messages that local gateway is sent are received, judge that the destination address of the 2nd IP messages is identical with the IP address of itself, and first base station finds to carry UE identifier in the route head of the 2nd IP messages, so as to know that the 2nd IP messages are destined to UE's.Therefore, the destination address of first IP messages is reduced into UE identifier by first base station, and eats dishes without rice or wine forward efficiency, it is necessary to shorten message length as far as possible to improve, so, first base station relays to UE after can the information in the route head in the first IP messages be weeded out.

S508:First IP messages are sent to UE by first base station.

Optionally, during another first base station in UE is switched to home network from current first base station, another base station can give SNC transmitting path handover requests（Path Switch Request) signaling message, notify SNC, UE to be switched to another first base station from first base station.Same, SNC also can send first message to local gateway, it is that the first IP messages of UE identifier are sent to another first base station to indicate local gateway by the destination address received, and delete original UEBS list items, i.e. local gateway and to delete the routed path of the first original IP messages.

Internet protocol retransmission method provided in an embodiment of the present invention, sent by SNC to local gateway and be forwarded to the current first base stations being resident of UE for indicating local gateway by the first IP messages received, local gateway generates UEBS list items according to the first message, so as to after the first IP messages are received, the destination address of first IP messages is revised as to the IP address of first base station, the 2nd IP messages are generated, so that the 2nd IP messages are reduced into after the first IP messages by first base station is sent to UE.Method provided in an embodiment of the present invention, can cause UE to facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.

The signaling process figure of the retransmission method embodiment seven for the internet protocol message that Figure 13 provides for the present invention.The present embodiment refer to UE from home network roam into roaming place network when, the detailed process that target device is communicated with UE.In the present embodiment, the first mobile gateway is local gateway or roaming place gateway, the base station that first base station is resident by UE in the network of roaming place.This method includes：

S601:SNC knows the first base station of roaming network and the roaming network that UE is currently resident. Specifically, after UE is attached in the network of roaming place（It is attached on the SNC in the network of roaming place）, the SNC of roaming place network is not aware that UE user profile, and it needs the SNC into UE home network to go to ask UE user profile, so as to know UE identifier.Also, therefore the SNC in home network also knows that UE is current in roaming network, and knows the IP address of the mobile gateway of roaming place.Herein, the SNC of roaming place network and the SNC of home network are referred to as SNC, and the interaction between it can be regarded as the identifier that SNC oneself knows UE, and SNC knows that UE is currently resident in the first base station in roaming network.

S602 :SNC sends first message to local gateway, and the first message is used to indicate the first IP messages for being sent to UE received being sent to roaming place gateway to local gateway.

S602 ' ：SNC sends first message to roaming place gateway, and the first message is used to indicate the 2nd IP messages for being sent to UE received being sent to first base station to roaming place gateway.

S603:Local gateway generates UEGW list items according to first message, identifier and the corresponding relation list item of the IP address of roaming place gateway that the UEGW list items are UE.

S603 ' ：Roaming place gateway generates UEBS list items according to first message, identifier and the corresponding relation list item of the IP address of first base station that the UEBS list items are UE.

Specifically, roaming place gateway and local gateway can generate UENH list items according to the first message respectively after the first message of SNC transmissions is received, the difference is that, local gateway generation is UEGW list items, and what roaming place gateway was now generated is UEBS list items.

S604:Target device sends the first IP messages to local gateway, and the destination address of the first IP messages is UE identifier.

S605:Local gateway judges that the destination address of the first IP messages is different from the host address of local gateway, and the first the network address of destination address and local gateway of IP messages differ, then gateway Check in local looks for the UEGW list items previously generated, after Check is looked for successfully, the destination address of first IP messages is changed to the IP address of roaming place gateway, the 2nd IP messages are generated, and the identifier of the UE in the first IP messages is filled into the route of the 2nd IP messages head.

Optionally, S605 situation can also be that local gateway judges that the destination address of the first IP messages is different from the host address of local gateway, and the first IP messages destination address it is identical with the network address of local gateway, but, local gateway Check looks for the UEBS tables of itself unsuccessful, the UEGW list items that Check is looked in UEGW tables.

S606:2nd IP messages are sent to roaming place gateway by local gateway. S607:Roaming place gateway judges that the destination address of the 2nd IP messages is identical with the host address of roaming place gateway, and the 2nd IP messages route head for sky, then gateway Check in roaming place looks for the UEBS list items itself previously generated, after Check is looked for successfully, the destination address of 2nd IP messages is changed to the IP address of first base station, the 2nd new IP messages of generation, the route head of the 2nd new IP messages includes UE identifier.

S608:The 2nd new IP messages are sent to first base station by roaming place gateway.

S609:First base station judges that the destination address of the 2nd new IP messages is the IP address of itself, and UE identifier is carried in route head, then the destination address of the 2nd new IP messages is reduced into UE identifier by first base station, and the content in route head is emptied, obtain the first initial IP messages.

Specifically, first base station is after the 2nd new IP messages that roaming place gateway is sent are received, judge that the destination address of the 2nd new IP messages is identical with the IP address of itself, and first base station finds that it is route in head and carries UE identifier, so as to know that the 2nd new IP messages are destined to UE's.Therefore, the destination address of the message is reduced into UE identifier by first base station, and in order to improve forward efficiency of eating dishes without rice or wine, need to shorten message length as far as possible, so, after first base station can weed out the information in the route head in the message, it is reduced into the first original IP messages.

S610:First IP messages are sent to UE by first base station.

The retransmission method of internet protocol message provided in an embodiment of the present invention, first message is sent to local gateway and roaming place gateway by SNC respectively, so that the first IP messages received are sent to roaming place gateway by local gateway after treatment according to the UEGW list items of generation, and cause roaming place gateway that the 2nd IP messages received are sent into first base station after treatment according to the UEBS list items of generation, so that the 2nd IP messages are reduced into after the first IP messages by first base station is sent to UE.Method provided in an embodiment of the present invention, during by the SNC first messages sent so that UE is from a netsurfing to another network, first IP messages can be forwarded on the first routing node by the mobile gateway in another network according to first message, so that by the first routing node by the first IP message routings to UE;And cause UE to facilitate the addressing of mobile terminal with one fixed IP address of permanent configuration.

The signaling process figure of the retransmission method embodiment eight for the internet protocol message that Figure 14 provides for the present invention.The present embodiment refer to UE from home network roam into roaming place network when, another detailed process that target device is communicated with UE.In the present embodiment, the first mobile gateway is local gateway or roaming place gateway, the base station that first base station is resident by UE in the network of roaming place.This method includes：

S701:SNC knows the first base station of roaming network and the roaming network that UE is currently resident.

Specifically, after UE is attached in the network of roaming place（It is attached on the SNC in the network of roaming place）, The SNC of roaming place network is not aware that UE user profile, and it needs the SNC into UE home network to go to ask UE user profile, so as to know UE identifier.Also, therefore the SNC in home network also knows that UE is current in roaming network, and knows the IP address of the mobile gateway of roaming place.Herein, the SNC of roaming place network and the SNC of home network are referred to as SNC, and the interaction between it can be regarded as the identifier that SNC oneself knows UE, and SNC knows that UE is currently resident in the first base station in roaming network.

S702 :SNC sends first message to local gateway, and the first message is used to indicate the first IP messages for being sent to UE received being sent to roaming place gateway to local gateway.

S702 ' ：SNC sends first message to roaming place gateway, and the first message is used to indicate the 2nd IP messages for being sent to UE received being sent to first base station to roaming place gateway.

S703:Local gateway generates UEGW list items according to first message, identifier and the corresponding relation list item of the IP address of roaming place gateway that the UEGW list items are UE.

S703 ' ：Roaming place gateway generates UEBS list items according to first message, identifier and the corresponding relation list item of the IP address of first base station that the UEBS list items are UE.

S704:The destination address that target device sends the first IP message A, the first IP messages A to local gateway is UE identifier.

S705:Local gateway judges that the first IP messages A destination address is different from the host address of local gateway, and the first the IP messages A network address of destination address and local gateway differ, then gateway Check in local looks for the UEGW list items previously generated, after Check is looked for successfully, first IP messages A destination address is changed to the IP address of roaming place gateway, the 2nd IP message A are generated, and the identifier of the UE in the first IP messages A is filled into the 2nd IP messages A route head.

Optionally, S705 situation can also be that local gateway judges that the first IP messages A destination address is different from the host address of local gateway, and the first IP messages A destination address it is identical with the network address of local gateway, but, local gateway Check looks for the UEBS tables of itself unsuccessful, can only the UEGW list items looked in UEGW tables of Check.

S706:2nd IP messages A is sent to roaming place gateway by local gateway.

S707:Roaming place gateway judges that the 2nd IP messages A destination address is identical with the host address of roaming place gateway, and the 2nd IP messages A route head for sky, then gateway Check in roaming place looks for the UEBS list items itself previously generated, after Check is looked for successfully, 2nd IP messages A destination address is changed to the IP address of first base station, generating the 2nd IP message B, the 2nd IP messages B route head includes UE mark Know symbol.

S708:2nd IP messages B is sent to first base station by roaming place gateway.

S709:First base station judges that the 2nd IP messages B destination address is the IP address of itself, and UE identifier is carried in route head, then the 2nd IP messages B destination address is reduced into UE identifier by first base station, and the content in route head is emptied, obtain the first initial IP messages A.

Specifically, first base station is after the 2nd IP messages B that roaming place gateway is sent is received, judge that the 2nd IP messages B destination address is identical with the IP address of itself, and first base station finds that it is route in head and carries UE identifier, so as to know that the 2nd IP messages B is destined to UE's.Therefore, the destination address of the message is reduced into UE identifier by first base station, and in order to improve forward efficiency of eating dishes without rice or wine, need to shorten message length as far as possible, so, after first base station can weed out the information in the route head in the 2nd IP messages B, the first original IP messages A is reduced into.

S710:First IP messages A is sent to UE by first base station.

S711:The identifier that the source address that UE sends the 3rd IP message A, the 3rd IP messages A to first base station is UE, destination address is the IP address of target device.

S712:3rd IP messages A is sent to roaming place gateway by first base station.

S713:Above-mentioned 3rd IP messages A source address is changed to the IP address of itself by roaming place gateway, generate the 3rd IP messages B, and fill the 3rd IP messages A source address into the 3rd IP messages B route head, i.e., UE identifier is filled into the 3rd IP messages B route head.

S714:3rd IP messages B is sent to target device by roaming place gateway.

S715:Target device is according to the 3rd IP messages B content routeing in head, and the destination address that will be sent to UE the first IP messages B is set to the IP address of roaming place gateway, and UE identifier is filled into the first IP messages B route head.

S716:First IP messages B is sent to roaming place gateway by target device.

S717:Roaming place gateway judges that the first IP messages B destination address is identical with the host address of oneself, Check is looked for after the UEBS list items success of itself, first IP messages B destination address is changed to the IP address of first base station, the content routeing in head keeps constant, generates the 2nd IP messages C.

S718:2nd IP messages C is sent to first base station by roaming place gateway.

S719:First base station judges that the 2nd IP messages C destination address is the IP address of itself, and UE identifier is carried in route head, then the 2nd IP messages C destination address is reduced into UE identifier by first base station, and the content in route head is emptied, obtain the first initial IP messages B. S720:First IP messages B is sent to UE by first base station.

The retransmission method of internet protocol message provided in an embodiment of the present invention, by the way that when UE sends the 3rd IP messages to target device, roaming place gateway is by the source address of the 3rd IP messages（UE identifier）Fill into the route head of the 3rd IP messages, and the IP address of roaming place gateway is set to the source address of the 3rd IP messages, so that target device is when receiving the 3rd IP messages, the first IP messages for being sent to UE are transmitted directly to roaming place gateway by the content in the source address of the 3rd IP messages and route head, the message can be also accurately forwarded without local gateway to UE, saves the expense of system.

One of ordinary skill in the art will appreciate that：Realize that above method embodiment full portions or Bu Fen Walk can be completed by the related hardware of programmed instruction suddenly, foregoing program can be stored in a computer read/write memory medium, upon execution, it is rapid that execution includes above method embodiment Walk to the program；And foregoing storage medium includes：R0M, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.

Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part or all technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.

Claims

Claims

1st, a kind of mobile gateway, it is characterised in that including：

Receiver, the first message for receiving radio network controller SNC transmissions；Wherein, the first message is used to indicate the mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；

Transmitter, for according to the first message by the first IP message routings received to first routing node.

2nd, mobile gateway according to claim 1, it is characterised in that the mobile gateway also includes:Processor, after receiving the first message that the SNC is sent in the receiver, the next tiny node UENH list items of mobile terminal are generated according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

3rd, mobile gateway according to claim 2, it is characterised in that the receiver, is additionally operable to receive the first IP messages that the network equipment is sent；The processor, UENH tables are looked for specifically for the identifier Check of the UE in the first IP messages, are obtained Check and are looked for result；Wherein, the UENH tables include the UENH list items；And look for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；

The then transmitter, specifically for the 2nd IP messages are sent to first routing node.

4th, mobile gateway according to claim 3, it is characterised in that the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, the then processor, specifically for generating UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE；Or, UEGW list items are generated according to the first message；Wherein, the UEGW list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

5th, mobile gateway according to claim 4, it is characterised in that the processor, judges to operate, obtains the first judged result specifically for performing first；Wherein, described first judges that operation includes：The processor judges whether the destination address of the first IP messages is identical with the host address of the mobile gateway, and judges whether the route heads of the first IP messages is empty；And judge according to described first As a result the UENH tables are looked for the identifier Check of the UE in the first IP messages, Check is obtained and looks for result.

6th, mobile gateway according to claim 5, it is characterized in that, the processor, if identical with the host address of the mobile gateway for the destination address of the first IP messages specifically for first judged result, and the route head of the first IP messages is not sky, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

7th, mobile gateway according to claim 6, it is characterized in that, the processor, if looking for result to look for the UEBS list items success for the processor Check specifically for the Check, it is the first base station then to determine first routing node, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages；

The then transmitter, specifically for the 2nd IP messages are sent to the first base station.

8th, mobile gateway according to claim 5, it is characterized in that, the processor, if being that the destination address of the first IP messages and the host address of the mobile gateway are differed specifically for first judged result, then judge whether the destination address of the first IP messages is identical with the network address of the mobile gateway, obtain the second judged result；And the identifier Check of the UE in second judged result and the first IP messages looks for the UENH tables, obtain the Check and look for result.

9th, mobile gateway according to claim 8, it is characterized in that, the processor, if identical with the network address of the mobile gateway for the destination address of the first IP messages specifically for second judged result, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

10th, mobile gateway according to claim 9, it is characterized in that, the processor, if looking for the UEBS list items success specifically for the Check identifier Check for looking for result to be the UE of the processor in the first IP messages, it is the first base station then to determine first routing node, and the destination address of the first IP messages is changed to the IP address of the first base station, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

The then transmitter, specifically for the 2nd IP messages are sent to the first base station.

11st, mobile gateway according to claim 9, it is characterised in that the processor, if looking for result to look for the UEBS list items unsuccessful for the processor Check specifically for the Check, according to institute State the UEGW list items that the identifier Check of the UE in the first IP messages is looked in the UEGW tables；If the UE of the processor in the first IP messages identifier Check looks for the UEGW list items success, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then the transmitter, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

12nd, mobile gateway according to claim 9, it is characterized in that, the processor, if it is that the destination address of the first IP messages and the network address of the mobile gateway are differed to be additionally operable to second judged result, the UEGW list items that then the identifier Check of the UE in the first IP messages is looked in the UEGW corresponding tables, obtain Check and look for result.

13rd, mobile gateway according to claim 12, it is characterized in that, the processor, if looking for the UEGW list items success specifically for the Check identifier Check for looking for result to be the UE of the mobile gateway in the first IP messages, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP addresses of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then the transmitter, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

14th, the mobile gateway according to claim any one of 1-4, it is characterized in that, if the UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, the mobile gateway is the mobile gateway of the current roaming networks of the UE, the then processor, it is additionally operable to when the receiver receives the 3rd IP messages that the UE is sent by the first base station, by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；And be set to the IP address of the mobile gateway after the new source address of the 3rd IP messages, 3rd IP messages are sent to the target device with the UE communication, so that the first IP messages are sent to the mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of the mobile gateway. 15th, a kind of radio network controller, it is characterised in that including：

Transmitter, for sending first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

16th, a kind of mobile gateway, it is characterised in that including：

Receiving module, the first message for receiving radio network controller SNC transmissions；Wherein, the first message is used to indicate the mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；

First sending module, for according to the first message by the first IP message routings received to first routing node.

17th, mobile gateway according to claim 16, it is characterised in that the mobile gateway also includes：

Generation module, for generating the next tiny node UENH list items of mobile terminal according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

18th, mobile gateway according to claim 17, it is characterised in that first sending module, is specifically included：

Receiving unit, the first IP messages for receiving network equipment transmission；

Check looks for unit, and the identifier Check for the UE in the first IP messages looks for UENH tables, obtains Check and looks for result；Wherein, the UENH tables include the UENH list items；

Generation unit, for looking for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；

Transmitting element, for the 2nd IP messages to be sent to first routing node.

19th, mobile gateway according to claim 18, it is characterised in that the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, the then generation module, specifically for generating UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE；Or, UEGW list items are generated according to the first message；Wherein, the UEGW list items are the identifier and the first via of the UE by saving The corresponding relation list item of the identifier of point, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

20th, mobile gateway according to claim 19, it is characterised in that the Check looks for unit, judges to operate, obtains the first judged result specifically for performing first；Wherein, described first judges that operation includes：Whether the Check looks for the destination address of the first IP messages described in unit judges identical with the host address of the mobile gateway, and judges whether the route heads of the first IP messages is empty；And the identifier Check of the UE in first judged result and the first IP messages looks for the UENH tables, obtain Check and look for result.

21st, mobile gateway according to claim 20, it is characterized in that, the Check looks for unit, if identical with the host address of the mobile gateway for the destination address of the first IP messages specifically for first judged result, and the route head of the first IP messages is not sky, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

22nd, mobile gateway according to claim 21, it is characterized in that, the generation unit, if looking for result to look for unit Check to look for the UEBS list items success for Check specifically for the Check, it is the first base station then to determine first routing node, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages；

The then transmitting element, specifically for the 2nd IP messages are sent to the first base station.

23rd, mobile gateway according to claim 20, it is characterized in that, the Check looks for unit, if it is that the destination address of the first IP messages and the host address of the mobile gateway are differed to be additionally operable to first judged result, then judge whether the destination address of the first IP messages is identical with the network address of the mobile gateway, obtain the second judged result；And the identifier Check of the UE in second judged result and the first IP messages looks for the UENH tables, obtain the Check and look for result.

24th, mobile gateway according to claim 23, it is characterized in that, the Check looks for unit, if identical with the network address of the mobile gateway for the destination address of the first IP messages specifically for second judged result, the UEBS list items that then the identifier Check of the UE in the first IP messages is looked in the UEBS tables, obtain the Check and look for result.

25th, mobile gateway according to claim 24, it is characterized in that, the generation unit, if looking for result to look for the UE of the unit in the first IP messages identifier Check to look for the UEBS list items success for the Check specifically for the Check, it is determined that first routing node is described first Base station, and the destination address of the first IP messages is changed to the IP address of the first base station, generates the 2nd IP messages, and by the identifier of the UE added in the route head of the 2nd IP messages；

The then transmitting element, specifically for the 2nd IP messages are sent to the first base station.

26th, mobile gateway according to claim 24, it is characterized in that, the generation unit, if looking for result to look for unit Check to look for the UEBS list items unsuccessful for the Check specifically for the Check, the UEGW list items that the identifier Check of the UE in the first IP messages is looked in the UEGW tables；If the Check looks for the UE of the unit in the first IP messages identifier Check to look for the UEGW list items success, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；Then the transmitting element, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

27th, mobile gateway according to claim 24, it is characterized in that, the Check looks for unit, if being that the destination address of the first IP messages and the network address of the mobile gateway are differed specifically for second judged result, the UEGW list items that then the identifier Check of the UE in the first IP messages is looked in the UEGW corresponding tables, obtain Check and look for result.

28th, mobile gateway according to claim 27, it is characterized in that, the generation unit, if looking for result to look for the UE of the unit in the first IP messages identifier Check to look for the UEGW list items success for the Check specifically for the Check, it is first routing node then to determine second mobile gateway, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then the transmitting element, specifically for the 2nd IP messages are sent to second mobile gateway, judges to operate so that second mobile gateway performs described first as the new mobile gateway.

29th, the mobile gateway according to claim any one of 16-19, it is characterized in that, if the UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, the mobile gateway is the mobile gateway of the current roaming networks of the UE, then the mobile gateway is also Including：

Logging modle, for when the receiving module receives the 3rd IP messages that the UE is sent by the first base station, by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；

Setup module, the new source address for the IP address of the mobile gateway to be set to the 3rd IP messages；

Second sending module, the 3rd IP messages for setup module to be obtained are sent to the target device communicated with the UE, so that the first IP messages are sent to the mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of the mobile gateway.

30th, a kind of radio network controller, it is characterised in that including：

Sending module, for sending first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.

31st, a kind of retransmission method of internet protocol message, it is characterised in that including：

First mobile gateway receives the first message that radio network controller SNC is sent；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE；

First mobile gateway is according to the first message by the first IP message routings received to first routing node.

32nd, method according to claim 31, it is characterised in that first mobile gateway is received after the first message that radio network controller SNC is sent, and methods described also includes：

First mobile gateway generates the next tiny node UENH list items of mobile terminal according to the first message；Wherein, the corresponding relation list item of identifier and the identifier of first routing node that the UENH list items are the UE.

33rd, method according to claim 32, it is characterised in that first mobile gateway according to the first message by the first IP message routings received to first routing node, specifically include：

First mobile gateway receives the first IP messages that the network equipment is sent；

The UE of first mobile gateway in the first IP messages identifier Check looks for UENH tables, Obtain Check and look for result；Wherein, the UENH tables include the UENH list items；

First mobile gateway looks for result to generate the 2nd IP messages according to the Check；Wherein, the destination address of the 2nd IP messages is the identifier of first routing node, and the route head of second message includes the identifier of the UE；

First mobile gateway sends the 2nd IP messages to first routing node.

34th, method according to claim 33, it is characterized in that, the UENH tables are mobile terminal base station UEBS tables or mobile-terminal gateway UEGW tables, then first mobile gateway generates the UENH list items according to the first message, specifically includes：

First mobile gateway generates UEBS list items according to the first message；Wherein, the UEBS list items are the UE identifier and the corresponding relation list item of the identifier of the first routing node, first routing node is first base station, and the first base station is by the base station currently resident UE；Or,

First mobile gateway generates UEGW list items according to the first message；Wherein, identifier and the corresponding relation list item of the identifier of the first routing node that the UEGW list items are the UE, first routing node is the second mobile gateway, and the network where second mobile gateway is by the network currently resident UE.

35th, method according to claim 34, it is characterised in that the UE of first mobile gateway in the first IP messages identifier Check looks for UENH tables, obtains Check and looks for result, including：

First mobile gateway performs first and judges operation, obtains the first judged result；Wherein, described first judges that operation includes：First mobile gateway judges whether the destination address of the first IP messages is identical with the host address of first mobile gateway, and judges whether the route heads of the first IP messages is empty；

The UE of first mobile gateway in first judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result.

36th, method according to claim 35, it is characterised in that the UE of first mobile gateway in first judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result, specifically include：

If first judged result is identical with the host address of first mobile gateway for the destination address of the first IP messages, and the route head of the first IP messages is not sky, then described in the UE of first mobile gateway in the first IP messages identifier Check is looked in the UEBS tables UEBS list items, obtain the Check and look for result.

37th, method according to claim 36, it is characterised in that first mobile gateway looks for result to generate the 2nd IP messages according to the Check, specifically includes：

If the Check looks for result to look for the UEBS list items success for the first mobile gateway Check, then first mobile gateway determines that first routing node is the first base station, and the destination address of the first IP messages is changed to the IP address of the first base station, generate the 2nd IP messages；

Then first mobile gateway sends the 2nd IP messages to first routing node, specifically includes：

First mobile gateway sends the 2nd IP messages to the first base station.

38th, method according to claim 35, it is characterised in that the UE of first mobile gateway in first judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result, in addition to：

Differed if first judged result is the destination address of the first IP messages and the host address of first mobile gateway, then first mobile gateway judges whether the destination address of the first IP messages is identical with the network address of first mobile gateway, obtains the second judged result；

The UE of first mobile gateway in second judged result and the first IP messages identifier Check looks for the UENH tables, obtains the Check and looks for result.

39th, the method according to claim 38, it is characterised in that the UE of first mobile gateway in second judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result, specifically include：

If second judged result is identical with the network address of first mobile gateway for the destination address of the first IP messages, the UEBS list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEBS tables, obtain the Check and look for result.

40th, the method according to claim 39, it is characterised in that first mobile gateway looks for result to generate the 2nd IP messages according to the Check, specifically includes：

If the identifier Check that the Check looks for result to be the UE of first mobile gateway in the first IP messages looks for the UEBS list items success, then first mobile gateway determines that first routing node is the first base station, and the destination address of the first IP messages is changed to the IP address of the first base station, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head； Then first mobile gateway sends the 2nd IP messages to first routing node, specifically includes：

First mobile gateway sends the 2nd IP messages to the first base station.

41st, the method according to claim 39, it is characterised in that first mobile gateway looks for result to generate the 2nd IP messages according to the Check, in addition to：

If the Check looks for result to look for the UEBS list items unsuccessful for the first mobile gateway Check, the UEGW list items that the UE of first mobile gateway in the first IP messages identifier Check is looked in the UEGW tables；

If the UE of first mobile gateway in the first IP messages identifier Check looks for the UEGW list items success, then first mobile gateway determines that second mobile gateway is first routing node, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head；

Then first mobile gateway sends the 2nd IP messages to first routing node, specifically includes：

First mobile gateway sends the 2nd IP messages to second mobile gateway, judges to operate so that second mobile gateway performs described first as the first new mobile gateway.

42nd, the method according to claim 39, it is characterised in that the UE of first mobile gateway in second judged result and the first IP messages identifier Check looks for the UENH tables, obtains Check and looks for result, in addition to：

Differed if second judged result is the destination address of the first IP messages and the network address of first mobile gateway, the UEGW list items that then UE of first mobile gateway in the first IP messages identifier Check is looked in the UEGW corresponding tables, obtain Check and look for result.

43rd, method according to claim 42, it is characterised in that first mobile gateway looks for result to generate the 2nd IP messages according to the Check, specifically includes：

If the identifier Check that the Check looks for result to be the UE of first mobile gateway in the first IP messages looks for the UEGW list items success, then first mobile gateway determines that second mobile gateway is first routing node, and the destination address of the first IP messages is changed to the IP address of second mobile gateway, the 2nd IP messages are generated, and the identifier of the UE is added in the route of the 2nd IP messages head； Then first mobile gateway sends the 2nd IP messages to first routing node, specifically includes：

First mobile gateway sends the 2nd IP messages to second mobile gateway, judges to operate so that second mobile gateway performs described first as the first new mobile gateway.

44th, the method according to claim any one of 31-34, it is characterized in that, if the UE is currently resident in roaming network, and the UE is resided in the first base station in the roaming network, first mobile gateway is the mobile gateway of the current roaming networks of the UE, then methods described also includes：First mobile gateway is when receiving the 3rd IP messages that the UE is sent by the first base station, and first mobile gateway is by the source address record of the 3rd IP messages in the route head of the 3rd IP messages；

The IP address of first mobile gateway is set to the new source address of the 3rd IP messages by first mobile gateway；

3rd IP messages are sent to the target device with the UE communication by first mobile gateway, so that the first IP messages are sent to first mobile gateway by the target device according to the new source address and the 3rd IP message routings head of the 3rd IP messages, the destination address of the first IP messages is the IP address of first mobile gateway.

45th, a kind of retransmission method of internet protocol message, it is characterised in that including：

Radio network controller SNC sends first message to the first mobile gateway；Wherein, the first message is used to indicate first mobile gateway by the first Internet protocol IP message routing to the first routing node received, and the first IP messages include the identifier of mobile terminal UE.