CN108900657A - LTE terminal data routing method and system under a kind of PGW pond networking - Google Patents
LTE terminal data routing method and system under a kind of PGW pond networking Download PDFInfo
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- CN108900657A CN108900657A CN201810969251.9A CN201810969251A CN108900657A CN 108900657 A CN108900657 A CN 108900657A CN 201810969251 A CN201810969251 A CN 201810969251A CN 108900657 A CN108900657 A CN 108900657A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
- H04L45/7453—Address table lookup; Address filtering using hashing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
Abstract
The invention discloses LTE terminal data routing method and systems under a kind of PGW pond networking, the online information of the first LTE terminal is obtained by the first PGW, the first IP address is distributed to the first LTE terminal, first IP address is stored in the first Hash table, and the first gratuitous ARP message including the first IP address is sent to network side equipment, network side equipment receives the first gratuitous ARP message, updates network side ARP entry；The present invention is by being sent to network side equipment for the gratuitous ARP message with IP address of terminal, network side equipment is enabled to learn the ARP entry to terminal, realize the update and maintenance to network side ARP entry, so that LTE terminal and network side equipment are become two layers of networking of same IP network section from three layers of original networking, so as to mutually know the IP address and MAC Address of other side, network side equipment can find the corresponding relationship of IP address and MAC Address accordingly, to carry out the encapsulation and forwarding of message, to guarantee the unimpeded of LTE terminal data uplink and downlink routing.
Description
Technical field
The present invention relates to LTE wireless technical field, in particular to LTE terminal data routing method under a kind of PGW pond networking
And system.
Background technique
As the application of LTE wireless technology is mature, all trades and professions all start investment construction LTE wireless network.In LTE network
Construction application in find, many industry customers above have a feature to be that LTE terminal IP address must be consolidated in the application of LTE network
Fixed and unique, when LTE terminal data reach the application server on rear side of LTE core network, IP address of terminal, which cannot make, to be changed, application
Server is needed according to LTE terminal IP address come distinguishing terminal business.
LTE data surface structure is specific as follows：LTE terminal IP address is distributed by LTE core network network element PGW, it can be understood as
IP inside LTE network, LTE network are docked with external network by the SGI mouth of PGW, SGI mouthfuls of IP address and LTE terminal IP address
Not in same network segment, LTE terminal belongs to three layers with network-side communication by SGI mouthfuls and communicates, if LTE terminal is directly with itself IP
Location is gone out, and needs network side with the backhaul road of the SGI mouthfuls of interchangers connected, router or application server configuration LTE terminal
By gateway is directed toward the SGI mouth of PGW, can just guarantee a network connections in this way.
In order to guarantee the reliable and stable of LTE core network, core net generallys use the mode networking in pond, includes the pond MME, SGW
Pond and the pond PGW, in core net in a manner of pond under networking application, LTE terminal selects core net, LTE according to balanced regular random
Terminal data uses the different PGW in the pond PGW to forward data at random, since to be that independent network element possesses independent by each PGW
SGI interface and IP distribute to the identical IP address of LTE terminal in different PGW for the network equipment docked with PGWSGI mouthfuls
In the case where, LTE terminal data can be sended over by any one PGW, can not fixed configurations backhaul routing, lead to LTE
Terminal is with network side server communication abnormality.The problem brings the large-scale network-estabilishing application of LTE wireless network in the industry all
It is mostly inconvenient.
Summary of the invention
The technical problem to be solved by the present invention is to：LTE terminal data routing method under a kind of PGW pond networking is provided and is
System, to guarantee the unimpeded of LTE terminal data uplink and downlink routing.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
LTE terminal data routing method under a kind of PGW pond networking, including step：
S11, the first PGW obtain the online information of the first LTE terminal, and the first IP address of distribution gives first LTE terminal, will
First IP address is stored in the first Hash table, and sends the first gratuitous ARP message including first IP address to network
Side apparatus；
S12, network side equipment receive the first gratuitous ARP message, update network side ARP entry.
In order to solve the above-mentioned technical problem, the another technical solution that the present invention uses for：
LTE terminal data routing system under a kind of PGW pond networking, including network side equipment and the networking by the way of pond
LTE core network, the LTE core network includes PGW, and the PGW includes PGW signalling module and PGW data module, described
PGW data module includes LTE terminal IP address maintenance module, ARP processing module and data forwarding channel,
The PGW signalling module is for obtaining the online information of LTE terminal, and distribution terminal IP address is to LTE terminal；
The LTE terminal IP address maintenance module is used to the IP address of terminal being stored in Hash table；
The ARP processing module includes the gratuitous ARP of the IP address of terminal for obtaining the IP address of terminal, building
Message；
The data forwarding channel is used to the gratuitous ARP message being sent to network side equipment；
The network side equipment updates network side ARP entry for receiving the gratuitous ARP message.
The beneficial effects of the present invention are：It is set by the way that the gratuitous ARP message for having IP address of terminal is sent to network side
It is standby, enable network side equipment to learn the ARP entry to terminal, realizes update and maintenance to network side ARP entry, so that
Under the interface route of network side equipment, LTE terminal and network side equipment become same IP network section from three layers of original networking
Two layers of networking, so as to mutually know the IP address and MAC Address of other side, network side equipment can find IP address accordingly
With the corresponding relationship of MAC Address, to carry out the encapsulation and forwarding of message, to guarantee the smooth of LTE terminal data uplink and downlink routing
It is logical；Meanwhile LTE terminal is interactive with network side server with fixed ip address.Networking is simplified in the deployment of LTE private network, it is special
It is not that may be implemented that network is cut to LTE private network under the change of network minimum in network cutting, improve LTE private network networking effect
Rate.
Detailed description of the invention
Fig. 1 be the embodiment of the present invention a kind of PGW pond networking under LTE terminal data routing method flow diagram；
Fig. 2 be the present embodiments relate to system initialization flow diagram；
Fig. 3 be the embodiment of the present invention a kind of PGW pond networking under LTE terminal data routing system block schematic illustration；
Fig. 4 is the frame of LTE terminal data routing system in practical applications under a kind of PGW pond networking of the embodiment of the present invention
Frame schematic diagram；
Fig. 5 be the present embodiments relate to LTE terminal IP address maintenance module flow diagram；
Fig. 6 be the present embodiments relate to ARP processing module flow diagram.
Label declaration：
1, LTE terminal data routing system under a kind of PGW pond networking；2, network side equipment；3, LTE core network；4,PGW；
5, PGW signalling module；6, PGW data module；7, LTE terminal IP address maintenance module；8, data forwarding channel；9, ARP is handled
Module.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
The design of most critical of the present invention is：The update and dimension that LTE terminal realizes network side ARP entry are acted on behalf of by PGW
Shield, to allow network side equipment study to the ARP entry of terminal, to guarantee the unimpeded of LTE terminal data uplink and downlink routing.
Before this, technical solution to facilitate the understanding of the present invention, for english abbreviation involved in the present invention, equipment
Etc. being described as follows：
(1),LTE：It is in the present invention the abbreviation of Long Term Evolution, it is logical that Chinese is construed to General Mobile
The long term evolution of letter technology, its current goal are the data transmission capabilities that wireless network is promoted by new technology and modulator approach
And data transmission bauds, LTE system mainly include LTE terminal, LTE base station and LTE core network.
Wherein, the english abbreviation of LTE core network is EPC, and MME is the abbreviation of Mobile Managenment Entity, meaning
For mobile management entity, it is the control plane for belonging to EPC；PGW is the abbreviation of Packet Data Network GateWay, meaning
For public data network gateway, it is mainly communicated by SGI interface with outer data network, including the user point for access
With IP address, SGI is the abbreviation of Short Guard Interval, means the short interval of wireless data block, IP Internet
The abbreviation of Protocol means the agreement interconnected between network；SGW is the abbreviation of Serving GateWay, means service network
It closes, it is mainly responsible for the functions such as routing and the forwarding of data packet, and PGW and SGW belong to the user face of EPC；HSS is Home
The abbreviation of Subscriber Serve, means home subscriber server, it is mainly responsible for storing user subscription information.
Wherein, LTE terminal can be indicated with UE, LTE base station can be indicated with eNB.
Wherein, PGW networking in a manner of pond of LTE core network and inside, then entire LTE group is on the net comprising multiple
The PGW of LTE core network and inside, in order to better illustrate the present invention, the present invention use the first PGW and corresponding in the text
First LTE terminal, first IP address etc. are not limited because of " first ", are intended merely to distinguish various components, each
Address either each message and a kind of naming method for formulating.
(2),ARP：It is in the present invention the abbreviation of Address Resolution Protocol, Chinese is construed to ground
Location analysis protocol, it is the ICP/IP protocol that physical address is obtained according to IP address.
(3), HASH table：The entitled Hash table of its foreign language, Chinese name can be again Hash table, hash table, it is according to pass
Key value and the data structure directly to access.
(4), MAC Address：The entitled Media Access Control Address of its foreign language, its Chinese name can be described as again
Hardware address, it is the position for defining the network equipment.
Please refer to Fig. 1 and Fig. 2, LTE terminal data routing method under a kind of PGW pond networking, including step：
S11, the first PGW obtain the online information of the first LTE terminal, and the first IP address of distribution gives first LTE terminal, will
First IP address is stored in the first Hash table, and sends the first gratuitous ARP message including first IP address to network
Side apparatus；
S12, network side equipment receive the first gratuitous ARP message, update network side ARP entry.
As can be seen from the above description, the beneficial effects of the present invention are：By the gratuitous ARP message that will have IP address of terminal
It is sent to network side equipment, network side equipment is enabled to learn the ARP entry to terminal, is realized to network side ARP entry
It updates and safeguards, so that LTE terminal and network side equipment are by three layers of original networking under the interface route of network side equipment
Become two layers of networking of same IP network section, so as to mutually know the IP address and MAC Address of other side, network side equipment can be with
The corresponding relationship of IP address and MAC Address is found accordingly, so that the encapsulation and forwarding of message are carried out, to guarantee LTE terminal data
Uplink and downlink routes unimpeded；Meanwhile LTE terminal is interactive with network side server with fixed ip address.In the deployment of LTE private network
Networking is simplified, especially in network cutting, may be implemented that network is cut to LTE private network under the change of network minimum, improve
LTE private network networking efficiency.
It further, further include step：
S21, the first PGW obtain the first LTE terminal offline information, discharge first IP address, and by the first IP
It is deleted from first Hash table address.
Seen from the above description, when LTE terminal is offline, IP address is discharged, avoids the resource of IP address by after offline
LTE terminal occupied by and caused by waste, to improve the utilization efficiency and sustainability of IP address resource.
It further, further include step：
S31, network side equipment inquiry whether there is the ARP entry of target LTE terminal, and if it exists, then according to the network
Side ARP entry and the target LTE terminal carry out the forwarding of data, otherwise send the ARP request including the target ip address
PGW of the message into LTE core network；
S32, the first PGW receive the ARP request message, judge that the target ip address whether there is and breathe out in described first
Otherwise uncommon table abandons the ARP request message if so, issuing ARP echo message to the network side equipment；
S33, network side equipment receive the ARP echo message, update network side ARP entry, and according to updated net
Network side ARP entry and the target LTE terminal carry out the forwarding of data.
Seen from the above description, it is to know pair between IP address and MAC Address by the key that interface route forwards
It should be related to, if the corresponding relationship in network side ARP entry, directly passes through the corresponding relationship and mesh in network side ARP entry
The forwarding that LTE terminal carries out data is marked, if not existing, broadcast the message addressing, responds in the ARP for receiving corresponding PGW feedback
After information, network side ARP entry is updated, to realize the forwarding of data, to further guarantee the walking along the street up and down of LTE terminal data
By it is unimpeded.
It further, further include step：
S41, the first PGW receive the second gratuitous ARP message that other PGW are sent, and parse the second gratuitous ARP message
The second interior IP address judges in first Hash table with the presence or absence of second IP address, and if it exists, then deletes described the
Otherwise the IP address in one Hash table ignores the second gratuitous ARP message.
Seen from the above description, it in order to guarantee the accuracy of the LTE terminal IP address stored in PGW data module, avoids
Same IP address of terminal has communication abnormality caused by carrying in different PGW.
It further, further include step before the step S11：
It is determined whether to enable LTE terminal agencies by PGW, if so, initializing entire PGW data module, otherwise only initialize
Data forwarding channel.
Seen from the above description, user can choose whether to act on behalf of LTE terminal by PGW according to oneself actual demand to realize
The update and maintenance of network side ARP entry, improve the flexibility of system.
Referring to figure 3. to Fig. 6, LTE terminal data routing system under a kind of PGW pond networking, including network side equipment and
The LTE core network of networking by the way of pond, the LTE core network include PGW, the PGW include PGW signalling module and
PGW data module, the PGW data module include LTE terminal IP address maintenance module, ARP processing module and data forwarding
Channel,
The PGW signalling module is for obtaining the online information of LTE terminal, and distribution terminal IP address is to LTE terminal；
The LTE terminal IP address maintenance module is used to the IP address of terminal being stored in Hash table；
The ARP processing module includes the gratuitous ARP of the IP address of terminal for obtaining the IP address of terminal, building
Message；
The data forwarding channel is used to the gratuitous ARP message being sent to network side equipment；
The network side equipment updates network side ARP entry for receiving the gratuitous ARP message.
As can be seen from the above description, the beneficial effects of the present invention are：By the gratuitous ARP message that will have IP address of terminal
It is sent to network side equipment, network side equipment is enabled to learn the ARP entry to terminal, is realized to network side ARP entry
It updates and safeguards, so that LTE terminal and network side equipment are by three layers of original networking under the interface route of network side equipment
Become two layers of networking of same IP network section, so as to mutually know the IP address of terminal and MAC Address of other side, network side equipment
The corresponding relationship of IP address of terminal and MAC Address can be found accordingly, so that the encapsulation and forwarding of message are carried out, to guarantee LTE
Terminal data uplink and downlink routes unimpeded；Meanwhile LTE terminal is interactive with network side server with fixed terminal IP address.In LTE
Networking is simplified in the deployment of private network, especially in network cutting, may be implemented to cut to network under the change of network minimum
LTE private network improves LTE private network networking efficiency.
Further, the PGW signalling module is also used to obtain LTE terminal offline information；
The LTE terminal IP address maintenance module is also used to discharge the IP address of terminal, and by the IP address of terminal
It is deleted from the Hash table.
Seen from the above description, when LTE terminal is offline, IP address of terminal is discharged, avoids the resource of IP address of terminal
Occupied by the LTE terminal after offline and caused by waste, to improve the utilization efficiency of IP address of terminal resource and sustainable
Property.
Further, the network side equipment is also used to inquire the ARP entry that whether there is target LTE terminal, and if it exists,
The forwarding that data are then carried out according to the network side ARP entry and the target LTE terminal, otherwise sending includes the Target IP
The ARP request message of address is to PGW；
The data forwarding channel is also used to for the ARP request message being sent to the ARP processing module, and will generate
ARP echo message is sent to the network side equipment；
The ARP processing module is also used to parse the target ip address in the ARP request message, and with receiving terminal IP
Location is receiveed the response, parse the IP address of terminal receive the response in query result, if query result be the target ip address
It is present in the Hash table, then generates ARP echo message, otherwise abandons the ARP request message；
The LTE terminal IP address maintenance module is used to judge that the target ip address to whether there is in the Hash table,
It receives the response if so, generating and sending IP address of terminal to the ARP processing module.
The network side equipment is also used to receive the ARP echo message, updates network side ARP entry, and according to update
Network side ARP entry and the target LTE terminal afterwards carries out the forwarding of data.
Seen from the above description, it is to know between IP address of terminal and MAC Address by the key that interface route forwards
Corresponding relationship, if the corresponding relationship in network side ARP entry, directly passes through the corresponding relationship in network side ARP entry
The forwarding of data is carried out with target LTE terminal, if not existing, broadcast the message addressing, in the ARP for receiving corresponding PGW feedback
After echo message, network side ARP entry is updated, to realize the forwarding of data, to further guarantee LTE terminal data or more
Walking along the street by it is unimpeded.
Further, the data forwarding channel is also used to for the gratuitous ARP message that other PGW are sent being sent to described
ARP processing module；
The ARP processing module parses the IP address of terminal in the gratuitous ARP message, and by the IP address of terminal
It is sent to LTE terminal IP address maintenance module；
The LTE terminal IP address maintenance module is also used to receive the IP address of terminal, judge be in the Hash table
No there are the IP address of terminal, and if it exists, then deletes the IP address of terminal in the Hash table, otherwise ignores described exempt from
Take ARP message.
Seen from the above description, it in order to guarantee the accuracy of the LTE terminal IP address stored in PGW data module, avoids
Same IP address of terminal has communication abnormality caused by carrying in different PGW.
Further, it is determined whether to enable LTE terminal agencies by the PGW, if so, the PGW data module is initialized,
Otherwise the data forwarding channel is only initialized.
Seen from the above description, user can choose whether to act on behalf of LTE terminal by PGW according to oneself actual demand to realize
The update and maintenance of network side ARP entry, improve the flexibility of system.
Fig. 1 and Fig. 2 is please referred to, the embodiment of the present invention one is：
LTE terminal data routing method under a kind of PGW pond networking, when whole system brings into operation, including step：
It is determined whether to enable LTE terminal agencies by PGW, if so, initializing entire PGW data module, otherwise only initialize
Data forwarding channel.
When LTE terminal is online, including step：
S11, the first PGW obtain the online information of the first LTE terminal, and the first IP address of distribution gives the first LTE terminal, by first
IP address is stored in the first Hash table, and sends the first gratuitous ARP message including the first IP address to network side equipment；
S12, network side equipment receive the first gratuitous ARP message, update network side ARP entry.
When LTE terminal is offline, including step：
S21, the first PGW obtain the first LTE terminal offline information, discharge the first IP address, and by the first IP address from the
It is deleted in one Hash table.
When network side equipment will send messages to LTE terminal, including step：
S31, network side equipment inquiry whether there is the ARP entry of target LTE terminal, and if it exists, then according to network side ARP
List item and target LTE terminal carry out the forwarding of data, otherwise send the ARP request message including target ip address to LTE core
PGW in net；
S32, the first PGW receive ARP request message, judge that target ip address whether there is in the first Hash table, if so,
ARP echo message is issued to network side equipment, otherwise abandons ARP request message；
S33, network side equipment receive ARP echo message, update network side ARP entry, and according to updated network side
ARP entry and target LTE terminal carry out the forwarding of data.
When PGW receives the gratuitous ARP message of the IP address of terminal of another PGW sending, including step：
S41, the first PGW receive the second gratuitous ARP message that other PGW are sent, and parse in the second gratuitous ARP message
Second IP address judges in the first Hash table with the presence or absence of the second IP address, and if it exists, with then deleting the IP in the first Hash table
Otherwise the second gratuitous ARP message is ignored in location.
Referring to figure 3. to Fig. 6, the embodiment of the present invention two is：
LTE terminal data routing system 1 under a kind of PGW pond networking, including network side equipment 2 and the group by the way of pond
The LTE core network 3 of net, LTE core network 3 include PGW4, so, all PGW4 also form a pond, wherein PGW4 includes
PGW signalling module 5 and PGW data module 6, PGW data module 6 include LTE terminal IP address maintenance module 7, ARP processing mould
Block 9 and data forwarding channel 8.
Wherein, in the present embodiment, network side equipment 2 can be interchanger or router, as shown in figure 4, network side
Equipment 2 is connect with application server, and LTE core network 3 is connect by the base station LET with LTE terminal, and PGW4 passes through data forwarding channel
8 communicate with network side equipment 2, and wherein data forwarding channel 8 is SGI interface.
When LTE terminal is online, PGW signalling module 5 is for obtaining the online information of LTE terminal, and distribution IP address is to LTE end
End, LTE terminal IP address maintenance module 7 are stored in Hash table, ARP processing for parsing IP address of terminal, and by IP address of terminal
Module 9 includes the gratuitous ARP message of IP address for obtaining IP address, building, and data forwarding channel 8 is for disappearing gratuitous ARP
Breath is sent to network side equipment 2, and network side equipment, in receiving gratuitous ARP message, updates network side ARP entry with 2.
When LTE terminal is offline, PGW signalling module 5 is for obtaining LTE terminal offline information, the maintenance of LTE terminal IP address
Module 7 deletes IP address for discharging IP address from Hash table.
When network side equipment 2 will send messages to LTE terminal, network side equipment 2 whether there is target LTE for inquiring
The ARP entry of terminal, and if it exists, the otherwise forwarding that data are then carried out according to network side ARP entry and target LTE terminal is sent
ARP request message including target ip address is to PGW4, and the data forwarding channel 8 on PGW4 is for sending ARP request message
To ARP processing module 9, ARP processing module 9 is used to parse the target ip address in ARP request message, LTE terminal IP address dimension
Shield module 7 is receiveed the response if so, generating and sending IP address to ARP for judging that target ip address whether there is in Hash table
Processing module 9, ARP processing module 9 are receiveed the response for receiving IP address, parsing IP address receive the response in query result,
If query result is that target ip address is present in Hash table, ARP echo message is generated, ARP request message is otherwise abandoned, this
When, data forwarding channel 8 is sent to network side equipment 2 for that will generate ARP echo message, and network side equipment 2 is for receiving ARP
Echo message updates network side ARP entry, and carries out data according to updated network side ARP entry and target LTE terminal
Forwarding.
When PGW4 receives the gratuitous ARP message of the IP address of terminal of another PGW4 sending, data forwarding channel 8 is used for
The gratuitous ARP message that other PGW4 are sent is sent to ARP processing module 9, ARP processing module 9 parses in gratuitous ARP message
IP address, and IP address is sent to LTE terminal IP address maintenance module 7, LTE terminal IP address maintenance module 7 is for connecing
IP address is received, is judged in Hash table with the presence or absence of IP address, and if it exists, then delete the IP address in Hash table, otherwise ignore and exempt from
Take ARP message.
When whole system brings into operation, it is determined whether to enable LTE terminal agencies by PGW4, if so, initialization PGW data
Module 6, otherwise initialization data forwarding channel 8.
In conclusion LTE terminal data routing method and system under a kind of PGW pond networking provided by the invention, pass through by
Gratuitous ARP message with IP address of terminal is sent to network side equipment, and network side equipment is enabled to learn the ARP table to terminal
, realize the update and maintenance to network side ARP entry so that under the interface route of network side equipment, LTE terminal and
Network side equipment becomes two layers of networking of same IP network section from three layers of original networking, so as to mutually know the IP of other side
Location and MAC Address, network side equipment can find the corresponding relationship of IP address and MAC Address accordingly, to carry out the envelope of message
Dress and forwarding, to guarantee the unimpeded of LTE terminal data uplink and downlink routing；Meanwhile LTE terminal is taken with fixed ip address with network side
Business device interaction, simplifies networking in the deployment of LTE private network, and especially in network cutting, the change of network minimum may be implemented
It is lower that network is cut into LTE private network, improve LTE private network networking efficiency；When LTE terminal is offline, IP address is discharged, avoids IP
The resource of address occupied by the LTE terminal after offline caused by waste, thus improve IP address resource utilization efficiency and
Sustainability；PGW checks the IP address in gratuitous ARP message, avoid same IP address of terminal in different PGW all
There is communication abnormality caused by carrying, with the accuracy for the LTE terminal IP address for ensuring to store in PGW data module.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (10)
1. LTE terminal data routing method under a kind of PGW pond networking, which is characterized in that including step：
S11, the first PGW obtain the online information of the first LTE terminal, and the first IP address of distribution gives first LTE terminal, will be described
First IP address is stored in the first Hash table, and sends the first gratuitous ARP message to the network side including first IP address and set
It is standby；
S12, network side equipment receive the first gratuitous ARP message, update network side ARP entry.
2. LTE terminal data routing method under a kind of PGW pond networking according to claim 1, which is characterized in that further include
Step：
S21, the first PGW obtain the first LTE terminal offline information, discharge first IP address, and by first IP address
It is deleted from first Hash table.
3. LTE terminal data routing method under a kind of PGW pond networking according to claim 1, which is characterized in that further include
Step：
S31, network side equipment inquiry whether there is the ARP entry of target LTE terminal, and if it exists, then according to the network side ARP
List item is sent on the target PGW connecting with target LTE terminal, and to carry out data forwarding, otherwise sending includes the Target IP
PGW of the ARP request message of address into LTE core network；
S32, the first PGW receive the ARP request message, judge that the target ip address whether there is in first Hash
Otherwise table abandons the ARP request message if so, issuing ARP echo message to the network side equipment；
S33, network side equipment receive the ARP echo message, update network side ARP entry, and according to updated network side
ARP entry and the target LTE terminal carry out the forwarding of data.
4. LTE terminal data routing method under a kind of PGW pond networking according to claim 1, which is characterized in that further include
Step：
S41, the first PGW receive the second gratuitous ARP message that other PGW are sent, and parse in the second gratuitous ARP message
Second IP address judges in first Hash table with the presence or absence of second IP address, and if it exists, then deletes described first and breathes out
The IP address in uncommon table, otherwise ignores the second gratuitous ARP message.
5. LTE terminal data routing method under a kind of PGW pond networking according to claim 1, which is characterized in that the step
It further include step before rapid S11：
It is determined whether to enable LTE terminal agencies by PGW, if so, initialize entire PGW data module, otherwise initialization data
Forwarding channel.
6. LTE terminal data routing system under a kind of PGW pond networking, including network side equipment and the networking by the way of pond
LTE core network, the LTE core network include PGW, and the PGW includes PGW signalling module and PGW data module, the PGW
Data module includes LTE terminal IP address maintenance module, ARP processing module and data forwarding channel, it is characterised in that：
The PGW signalling module is for obtaining the online information of LTE terminal, and distribution terminal IP address is to LTE terminal；
The LTE terminal IP address maintenance module is used to the IP address of terminal being stored in Hash table；
The ARP processing module includes that the gratuitous ARP of the IP address of terminal disappears for obtaining the IP address of terminal, building
Breath；
The data forwarding channel is used to the gratuitous ARP message being sent to network side equipment；
The network side equipment updates network side ARP entry for receiving the gratuitous ARP message.
7. LTE terminal data routing system under a kind of PGW pond networking according to claim 6, it is characterised in that：
The PGW signalling module is also used to obtain LTE terminal offline information；
The LTE terminal IP address maintenance module is also used to discharge the IP address of terminal, and by the IP address of terminal from institute
It states in Hash table and deletes.
8. LTE terminal data routing system under a kind of PGW pond networking according to claim 6, which is characterized in that
The network side equipment is also used to inquire the ARP entry that whether there is target LTE terminal, and if it exists, then according to the net
Network side ARP entry is sent on the target PGW connecting with target LTE terminal, and to carry out data forwarding, it includes described for otherwise sending
The ARP request message of target ip address is to PGW；
The data forwarding channel is also used to for the ARP request message to be sent to the ARP processing module, and will generate ARP
Echo message is sent to the network side equipment；
The ARP processing module is also used to parse the target ip address in the ARP request message, and receives IP address response and disappear
Breath, parse the IP address receive the response in query result, if query result be the target ip address be present in the Kazakhstan
Uncommon table, then generate ARP echo message, otherwise abandon the ARP request message；
The LTE terminal IP address maintenance module is used to judge that the target ip address to whether there is in the Hash table, if so,
IP address is generated and sent to receive the response to the ARP processing module；
The network side equipment is also used to receive the ARP echo message, updates network side ARP entry, and according to updated
Network side ARP entry and the target LTE terminal carry out the forwarding of data.
9. LTE terminal data routing system under a kind of PGW pond networking according to claim 6, it is characterised in that：
The data forwarding channel is also used to the gratuitous ARP message that other PGW are sent being sent to the ARP processing module；
The ARP processing module parses the IP address of terminal in the gratuitous ARP message, and the IP address of terminal is sent
To LTE terminal IP address maintenance module；
The LTE terminal IP address maintenance module is also used to receive the IP address of terminal, judges whether deposit in the Hash table
In the IP address of terminal, and if it exists, then delete the IP address of terminal in the Hash table, otherwise ignore described free
ARP message.
10. LTE terminal data routing system under a kind of PGW pond networking according to claim 6, it is characterised in that：
It is determined whether to enable LTE terminal agencies by the PGW, if so, initializing the PGW data module, otherwise only initialize
The data forwarding channel.
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