CN104768199A - Data packet transmission method and device - Google Patents
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Abstract
The embodiment of the invention discloses a data packet transmission method and device. The data packet transmission method comprises the following steps that a data packet which is sent by a core network and aims at a target terminal is received; a tunnel end point identifier (TEID) value of the target terminal included in the data packet in a target MeNB is obtained; whether the obtained TEID value is recorded in a prestored routing table or not is inquired; under the condition that the inquiry result is yes, a protocol header of the data packet is changed according to protocol parameter information of the target terminal recorded in the routing table; the data packet with the protocol header changed is sent to the target SeNB. According to the technical scheme, the route detouring problem generated when the data packet not needing PDCP layer processing through the target MeNB is transmitted can be avoided, and pressure of a transmission network and transmission delay of user data are reduced.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of data pack transmission method and device.
Background technology
Along with the fast development of mobile terminal technology and user are to the continuous growth of data service rate demand, conventional macro base station individual layer overlay network cannot meet the high demand of user to data service rate.3GPP solves this problem by introducing small-cell (Small-Cell) layering networking.But the dense deployment of small-cell can cause the frequent switching of terminal UE, the signaling traffic load of core net is raised.
For reducing the signaling traffic load of core net, 3GPP introduces MA (Mobility Anchor, mobility anchor point), namely the base station that selection coverage is larger is as the mobility anchor point MA of the less base station of coverage, Signalling exchange is carried out by MA and core net, the base station that coverage under MA covers is less and core net do not have signalling interactive process, the network architecture diagram of introducing mobility anchor point as shown in Figure 1, MA is the mobility anchor point of small-cell, small-cell is the Serving cell (Serving cell) of terminal UE, MA and core net carry out Signalling exchange, and small-cell and core net do not have signalling interactive process.Such as, in grand sheaf of differentials networking scene, macro base station MeNB can be selected as the mobility anchor point of micro-base station SeNB, when UE switches between multiple SeNB that MA covers, only by RRC (Radio ResourceControl between MA and SeNB, radio resource control) signaling carries out interpolation and the deletion of SeNB, and SeNB does not need to carry out Signalling exchange with core net, and MA conceals the mobility of UE to core net as the anchor point of SeNB.That is, after introducing mobility anchor point MA, the moving process of UE in MA coverage is sightless for core net, even if when switching between multiple SeNB of UE under same MA covers, do not need SeNB to send hand off signaling to core net, thus the signaling traffic load of core net can be reduced yet.
Mainly comprise router and base station eNB in the Access Network of IP based network, the packet that core net sends to the packet of MA or SeNB, MA sends to SeNB all needs to be forwarded by router.In the prior art, core net sends the process of packet as shown in Figure 2 to SeNB, core net sends to the packet meeting of SeNB first via S-GW (Serving Gateway, gateway) send to router, send to MA via router again, then send to SeNB via router again by MA.In actual applications, the data that core net issues SeNB are surrounded by two types: the packet of the first type needs MA to carry out PDCP (Packet Data Convergence Protocol, PDCP) layer process, router by the Packet Generation of the first type to MA, packet after process, after the process of PDCP layer, is sent to SeNB via router by MA; The packet of the second type does not need MA to carry out the process of PDCP layer, and the Packet Generation of the second type is transmitted to SeNB via router to MA, MA by router again.For the packet of the second type, the packet being transmitted to MA through router by S-GW is identical with MA via the data division that router is transmitted in the packet of SeNB, thus alternate route is created between MA and router, reduce the bandwidth utilization efficiency between MA and router, waste relevant transfer resource, add propagation delay time.
Summary of the invention
For solving the problem, the embodiment of the invention discloses a kind of data pack transmission method and device.Technical scheme is as follows:
A kind of data pack transmission method, comprising:
Receive the packet for target terminal that core net sends;
Obtain in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised;
Inquire about in the routing table prestored and whether record the TEID value obtained to some extent, wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point;
When Query Result is for being, the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
Described target SeNB is given by the Packet Generation after change protocol header.
In a kind of embodiment of the present invention, the protocol parameter information that the described target terminal recorded in described routing table is corresponding is obtained by following steps:
Receive and record the protocol parameter information corresponding with described target terminal that described target MeNB sends, the corresponding protocol parameter information of described and described target terminal is: the protocol parameter information that the described target terminal sent when described target MeNB detects that described target terminal moves in the coverage of described target SeNB is corresponding.
In a kind of embodiment of the present invention, delete in described routing table protocol parameter information corresponding to the described target terminal that records by following steps:
The delete instruction of the protocol parameter information corresponding for described target terminal that receiving target MeNB sends, described delete instruction is: described target MeNB detects the delete instruction that described target terminal sends when leaving the coverage of described target MeNB;
According to the delete instruction received, delete in described routing table the protocol parameter information that the described target terminal that records is corresponding.
In a kind of embodiment of the present invention, the protocol parameter information that described target terminal is corresponding at least comprises: the IP address of the TEID value of described target terminal in described target MeNB, the TEID value of described target terminal in described target SeNB, the UDP port number of described target MeNB, the IP address of described target MeNB and described target SeNB.
In a kind of embodiment of the present invention, the described protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet, comprising:
According to the IP address of the described target SeNB recorded in described routing table, the source IP address of the IP header of described packet is revised as local ip address, the object IP address of IP header is revised as the IP address of described target SeNB, and upgrades the School Affairs of IP header;
According to the UDP port number of the described target MeNB recorded in described routing table, the source port number in the UDP header of described packet is revised as the UDP port number of described target MeNB, and upgrades the School Affairs of UDP header;
According to the TEID value of the described target terminal recorded in described routing table in described target SeNB, the TEID value in the GTP-U header of described packet is revised as the TEID value of described target terminal in described target SeNB.
A kind of data packet transmission device, comprising:
Packet-receiving module, for receiving the packet for target terminal that core net sends;
TEID value obtains module, for obtaining in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised;
TEID value enquiry module, for inquiring about in the routing table that prestores whether record the TEID value obtained to some extent, wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point;
Protocol header change module, for when the Query Result of described TEID value enquiry module is for being, the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
Packet Generation module, for giving described target SeNB by the Packet Generation after change protocol header.
In a kind of embodiment of the present invention, also comprise protocol parameter information acquisition module:
Described protocol parameter information acquisition module, specifically for receiving and recording the protocol parameter information corresponding with described target terminal that described target MeNB sends, the corresponding protocol parameter information of described and described target terminal is: the protocol parameter information that the described target terminal sent when described target MeNB detects that described target terminal moves in the coverage of described target SeNB is corresponding.
In a kind of embodiment of the present invention, also comprise information deletion command reception module and protocol parameter information deletion module:
Described information deletion command reception module, for the delete instruction of the protocol parameter information corresponding for described target terminal that receiving target MeNB sends, described delete instruction is: described target MeNB detects the delete instruction that described target terminal sends when leaving the coverage of described target MeNB;
Described protocol parameter information deletion module, for according to the delete instruction that receives, deletes in described routing table the protocol parameter information that the described target terminal that records is corresponding.
In a kind of embodiment of the present invention, the protocol parameter information that described target terminal is corresponding at least comprises: the IP address of the TEID value of described target terminal in described target MeNB, the TEID value of described target terminal in described target SeNB, the UDP port number of described target MeNB, the IP address of described target MeNB and described target SeNB.
In a kind of embodiment of the present invention, described protocol header change module, comprising:
IP header change submodule, for the IP address according to the described target SeNB recorded in described routing table, the source IP address of the IP header of described packet is revised as local ip address, the object IP address of IP header is revised as the IP address of described target SeNB, and upgrades the School Affairs of IP header;
UDP header change submodule, for the UDP port number according to the described target MeNB recorded in described routing table, is revised as the UDP port number of described target MeNB, and upgrades the School Affairs of UDP header by the source port number in the UDP header of described packet;
GTP-U header change submodule, for according to the TEID value of the described target terminal recorded in described routing table in described target SeNB, the TEID value in the GTP-U header of described packet is revised as the TEID value of described target terminal in described target SeNB.
The technical scheme that the application embodiment of the present invention provides, router receive core net send for after the packet of target terminal, directly be not transmitted to the target MeNB as mobility anchor point MA, but first inquire about the TEID value whether recording in its routing table prestored and comprise in this packet, if Query Result is yes, then represent that this packet does not need target MeNB to carry out the process of PDCP layer, protocol parameter information that can be corresponding according to the target terminal recorded in routing table, change the protocol header of this packet, and by the Packet Generation after change protocol header to target SeNB, route detour problem is produced when avoiding transmitting this kind of packet, reduce the pressure of transmission network and the propagation delay time of user data.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the network architecture diagram introducing mobility anchor point in prior art;
Fig. 2 is downstream packet transmission process schematic in prior art;
Fig. 3 is the implementing procedure figure of a kind of data pack transmission method in the embodiment of the present invention;
Fig. 4 is application scenarios network structure in the embodiment of the present invention;
Fig. 5 a is 2A scheme schematic diagram in user face in the embodiment of the present invention;
Fig. 5 b is 3C scheme schematic diagram in user face in the embodiment of the present invention;
Fig. 6 is the schematic flow sheet that in the embodiment of the present invention, terminal and micro-base station connect;
Fig. 7 is downstream packet transmission process schematic in the embodiment of the present invention;
Fig. 8 is the structural representation of a kind of data packet transmission device in the invention process.
Embodiment
First be described a kind of data pack transmission method that the embodiment of the present invention provides, the method can comprise the following steps:
Receive the packet for target terminal that core net sends;
Obtain in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised;
Inquire about in the routing table prestored and whether record the TEID value obtained to some extent, wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point;
When Query Result is for being, the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
Described target SeNB is given by the Packet Generation after change protocol header.
The executive agent of above-mentioned steps is router, is applied in the network environment introducing mobility anchor point.
In downstream packet transmission process, router receives the packet for target terminal that core net sends, the TEID value of target terminal in target MeNB is comprised in this packet, router obtains this TEID value, and in its routing table prestored, inquire about the TEID value whether recording and obtain to some extent, Query Result has two kinds of situations:
A kind of Query Result is, record the TEID value obtained to some extent in the routing table, can show this target terminal current target MeNB cover under target SeNB coverage in (target MeNB is as the mobility anchor point of target SeNB), and this packet does not need target MeNB through the process of PDCP layer, that is, for avoiding alternate route, this packet can not be transmitted to target MeNB by router, but the protocol parameter information corresponding according to the target terminal recorded in routing table, change the protocol header in this packet, and the packet after change protocol header is directly sent to target SeNB,
A kind of Query Result is, do not record obtained TEID value in the routing table, can show that the current possibility of this target terminal is only in the independent coverage of target MeNB, or keep being connected with target MeNB and target SeNB in the coverage of the target SeNB under target MeNB covers simultaneously, and this packets need target MeNB is through the process of PDCP layer, in this case, the TEID value of this target terminal in target MeNB can not be recorded in the routing table of router, after router receives this packet, according to available data bag transmitting procedure, this packet is transmitted to target MeNB, further process is done again by MeNB.
The technical scheme that the application embodiment of the present invention provides, router receive core net send for after the packet of target terminal, directly be not transmitted to the target MeNB as mobility anchor point MA, but first inquire about the TEID value whether recording in its routing table prestored and comprise in this packet, if Query Result is yes, then represent that this packet does not need target MeNB to carry out the process of PDCP layer, protocol parameter information that can be corresponding according to the target terminal recorded in routing table, change the protocol header of this packet, and by the Packet Generation after change protocol header to target SeNB, route detour problem is produced when avoiding transmitting this kind of packet, reduce the pressure of transmission network and the propagation delay time of user data.
Technical scheme in the embodiment of the present invention is understood better in order to make those skilled in the art, 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 only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Shown in Figure 3, be the implementing procedure figure of a kind of data pack transmission method that the embodiment of the present invention provides, the method can comprise the following steps:
S110: receive the packet for target terminal that core net sends.
For convenience of understanding, first the application scenarios of the embodiment of the present invention is described, as shown in Figure 4, multiple Acer station MeNB (MeNB1 is disposed in this network, MeNB2, and multiple micro-base station SeNB MeNB3), multiple micro-base station SeNB (SeNB1 is disposed under MeNB1 covers, SeNB2 and SeNB3), and MeNB1 is as SeNB1, the mobility anchor point of SeNB2 and SeNB3, Signalling exchange is carried out by MeNB1 and core net, target terminal is in each move between base stations, if target terminal moves in the coverage of the SeNB1 under MeNB1 covering, then MeNB1 is target MeNB, SeNB1 is target SeNB.For ease of describing, all carry out under this application scenarios for illustrating of each step of the embodiment of the present invention below.
In downstream packet transmission process, the packet for target terminal that core net sends, needs to forward through router, finally issues as target terminal provides the macro base station MeNB of service or micro-base station SeNB.Router receive that core net sends for after the packet of this target terminal, continue to perform the operation of step S120.
S120: obtain in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised.
Be understandable that, it is no matter actual that provide service for target terminal is MeNB or SeNB, mutual always MeNB is carried out with core net, so, core net send downlink data packet time determined which MeNB this packet will be issued, its send for the packet of target terminal in comprise the tunnel endpoint identifier TEID value of this target terminal in target MeNB.
S130: inquire about in the routing table prestored whether record the TEID value obtained to some extent.
Wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point.
In actual applications, the routing table prestored in router is at least for protocol parameter information that record object terminal is corresponding, router can set up different routing tables for different terminals, the routing table of each terminal records protocol parameter information corresponding to this terminal respectively, or in same routing table, can set up protocol parameter information corresponding to each terminal respectively.Concrete, the protocol parameter information that target terminal is corresponding at least comprises: the IP address of the TEID value of target terminal in target MeNB, the TEID value of target terminal in target SeNB, the UDP port number of target MeNB, the IP address of target MeNB and target SeNB.
In a kind of embodiment of the present invention, the protocol parameter information that the described target terminal recorded in routing table is corresponding can be obtained by following steps:
Receive and record the protocol parameter information corresponding with described target terminal that described target MeNB sends, the corresponding protocol parameter information of described and described target terminal is: the protocol parameter information that the described target terminal sent when described target MeNB detects that described target terminal moves in the coverage of described target SeNB is corresponding.
Be understandable that, the protocol parameter information that the target terminal recorded in routing table is corresponding is sent by target MeNB.When target terminal move to target MeNB cover under target SeNB coverage in time, target MeNB first judges, judge whether to need the downlink data packet corresponding to this target terminal to carry out the process of PDCP layer, if do not needed, target MeNB can send the protocol parameter information corresponding with this target terminal to router.
Concrete, target MeNB can judge according to the user face scheme of the ability of target terminal and employing.In actual applications, conventional user face scheme has two classes: the 2A scheme shown in Fig. 5 a and the 3C scheme shown in Fig. 5 b.
When target terminal adopts user face 3C scheme, when being positioned at MeNB1 and SeNB1 Double mulch scope, can keep being connected with MeNB1 and SeNB1, target terminal be two pairs and receives terminal simultaneously.The downlink data packet of target terminal sends to MeNB1 by core net via router, after MeNB1 carries out the process of PDCP layer to this packet, carry out radio bearer separation, part PDCP PDU (Protocol Data Uint, protocol Data Unit) issue SeNB1 by MeNB1 by router, carry out air interface transmission by SeNB1.
When target terminal adopts user face 2A scheme, can only keep being connected with a base station, target terminal is that terminal received by single-shot list simultaneously.Connection of eating dishes without rice or wine is provided to carry out data packet transmission when target terminal is in the independent coverage of MeNB1 by MeNB1, when target terminal moves to SeNB1 coverage, when being positioned at MeNB1 and SeNB1 Double mulch scope, there is provided connection of eating dishes without rice or wine to carry out data packet transmission by SeNB1, the downlink data packet that target terminal is corresponding does not need MeNB1 through the process of PDCP layer.
Wherein, when target terminal moves in the coverage of SeNB1, the process that target terminal and SeNB1 connect is shown in Figure 6:
S210:MeNB1 sends small-cell to SeNB1 and adds request message, the information such as TEID value of the QoS (Quality of Service, service quality) of target terminal, the configuration in MeNB1 of target terminal ability, target terminal, the GTP-U layer of target terminal in MeNB1 is carried in this request message;
S220:SeNB1 sends small-cell to MeNB1 and adds request acknowledge message after judgement, carries the information such as the TEID value of the configuration of target terminal in SeNB1, the target terminal GTP-U layer in SeNB1 in this acknowledge message;
S230:MeNB1 sends RRC reconfiguration message to target terminal;
S240: target terminal completes after the wireless link of SeNB1, sends RRC to MeNB1 and has reshuffled message;
S250:MeNB1 sends small-cell to SeNB1 and has added message.
So far, target terminal and SeNB1 establish wireless link, and the downlink data packet issuing target terminal will carry out air interface transmission by SeNB1.Meanwhile, MeNB1 obtains protocol parameter information corresponding to target terminal.
After MeNB1 determines that downlink data packet that target terminal is corresponding does not need it to carry out the process of PDCP layer, protocol parameter information corresponding for target terminal is sent to router, and these information are recorded in routing table by router.That is, the protocol parameter information that should be of recording in the current routing table protocol parameter information that MeNB1 is correlated with is relevant with SeNB1.If target terminal moves to SeNB2 from the SeNB1 MeNB1 covering, MeNB1 sends protocol parameter information updating request according to the shift position of target terminal to router, the protocol parameter information that SeNB2 is relevant sends to router, and the protocol parameter information updating that the SeNB1 recorded in its routing table is correlated with by router is the protocol parameter information that SeNB2 is relevant.
When target terminal leaves target MeNB coverage, protocol parameter information corresponding to the described target terminal that records can be deleted in described routing table by following steps:
Step one: the delete instruction of the protocol parameter information corresponding for described target terminal that receiving target MeNB sends, described delete instruction is: described target MeNB detects the delete instruction that described target terminal sends when leaving the coverage of described target MeNB;
Step 2: according to the delete instruction received, deletes in described routing table the protocol parameter information that the described target terminal that records is corresponding.
Such as, target terminal leaves MeNB1 coverage and enters MeNB2 coverage, the delete instruction that MeNB1 will send to router for protocol parameter information corresponding to target terminal, if the routing table that different terminals is corresponding different, router according to this delete instruction, will delete the routing table that target terminal is corresponding, if record protocol parameter information corresponding to multiple terminal in a routing table, then router is according to this delete instruction, deletes the protocol parameter information that in routing table, target terminal is corresponding.Accordingly, MeNB2 will complete the corresponding foundation in the router of protocol parameter information corresponding to target terminal, renewal work according to foregoing schemes.
To sum up, inquiring about in the routing table prestored whether record the TEID value obtained to some extent, when Query Result is for being, showing that the downlink data packet of target terminal does not need target MeNB to carry out the process of PDCP layer, the operation performing step S140 can be continued.
S140: the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
As previously mentioned, the protocol parameter information that target terminal is corresponding at least comprises: the IP address of the TEID value of target terminal in target MeNB, the TEID value of target terminal in target SeNB, the UDP port number of target MeNB, the IP address of target MeNB and target SeNB.The protocol header of the packet that router receives according to these protocol parameter information change step S110.
In a kind of embodiment of the present invention, step S140 can comprise the following steps:
Step one: according to the IP address of the described target SeNB recorded in described routing table, the source IP address of the IP header of described packet is revised as local ip address, the object IP address of IP header is revised as the IP address of described target SeNB, and upgrades the School Affairs of IP header;
IP layer message format is as shown in table 1:
Table 1
For IP layer, router is when forwarding data bag, although transmission path changes, its information such as protocol version, header length all need not change, and what unique needs changed is source address, destination address and School Affairs.
The protocol parameter information corresponding according to the target terminal of routing table record, is revised as the IP address of router by source IP address, object IP address is revised as the IP address of target SeNB, and recalculates the School Affairs of IP header and change.That is:
Before amendment, source address is the IP address of S-GW in core net, and destination address is the IP address of target MeNB, and School Affairs is obtain according to the IP address of S-GW and the IP address computation of target MeNB;
After amendment, source address is the IP address of router, and destination address is the IP address of target SeNB, and School Affairs is obtain according to the IP address of router and the IP address computation of target SeNB.
Step 2: according to the UDP port number of the described target MeNB recorded in described routing table, the source port number in the UDP header of described packet is revised as the UDP port number of described target MeNB, and upgrades the School Affairs of UDP header;
UDP message format is as shown in table 2:
Table 2
For UDP layer, the parameter that the change of transmission path may affect has source port, destination interface, School Affairs.Consider that destination slogan is fixing, need not record destination slogan in the routing table, only need record source port number, for the downlink transfer between MeNB and SeNB, source port number is the port numbers of MeNB.The protocol parameter information corresponding according to the target terminal recorded in routing table, is revised as the port numbers that target MeNB is assigned with, and UDP School Affairs is changed to the numerical value newly calculated by source port number.That is:
Before amendment, source port number is the port numbers that in core net, S-GW is assigned with, and School Affairs is use the port numbers of S-GW to calculate;
After amendment, source port number is the port numbers that target MeNB is assigned with, and School Affairs is use MeNB port numbers to calculate.
Step 3: according to the TEID value of the described target terminal recorded in described routing table in described target SeNB, is revised as the TEID value of described target terminal in described target SeNB by the TEID value in the GTP-U header of described packet.
GTP-U layer message format is as shown in table 3:
Table 3
Router needs the original information being issued target MeNB by S-GW, by revising corresponding protocol fields, it is made to become the information being issued target SeNB by target MeNB, endpoint of a tunnel changes, GTP-U tunnel endpoint identifier TEID value also will change accordingly, and other information can not be subject to the impact of endpoint of a tunnel change and change.The protocol parameter information corresponding according to the target terminal recorded in routing table, is revised as the TEID value of target terminal in target SeNB by TEID.That is:
Before amendment, tunnel endpoint identifier is the TEID value in core net between S-GW and target MeNB;
After amendment, tunnel endpoint identifier is the TEID value between target MeNB and target SeNB.
It should be noted that, the execution sequence of the embodiment of the present invention to above-mentioned three steps does not limit.
S150: give described target SeNB by the Packet Generation after change protocol header.
Change protocol header after, the IP address that the object IP address in packet will be modified as target SeNB, according to this IP address, router by Packet Generation to target SeNB.
For not needing target MeNB to carry out the transmitting procedure of the packet of PDCP layer process as shown in Figure 7, after packet is issued router by core net, router carries out header amendment, by Packet Generation to SeNB.
The technical scheme that the application embodiment of the present invention provides, router receive core net send for after the packet of target terminal, directly be not transmitted to the target MeNB as mobility anchor point MA, but first inquire about the TEID value whether recording in its routing table prestored and comprise in this packet, if Query Result is yes, then represent that this packet does not need target MeNB to carry out the process of PDCP layer, protocol parameter information that can be corresponding according to the target terminal recorded in routing table, change the protocol header of this packet, and by the Packet Generation after change protocol header to target SeNB, route detour problem is produced when avoiding transmitting this kind of packet, reduce the pressure of transmission network and the propagation delay time of user data.
Corresponding to embodiment of the method above, the embodiment of the present invention additionally provides a kind of data packet transmission device, shown in Figure 8, and this device can comprise with lower module:
Packet-receiving module 310, for receiving the packet for target terminal that core net sends;
TEID value obtains module 320, for obtaining in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised;
TEID value enquiry module 330, for inquiring about in the routing table that prestores whether record the TEID value obtained to some extent, wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point;
Protocol header change module 340, for when the Query Result of described TEID value enquiry module 330 is for being, the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
Packet Generation module 350, for giving described target SeNB by the Packet Generation after change protocol header.
In a kind of embodiment of the embodiment of the present invention, can also comprise with lower module:
Protocol parameter information acquisition module, specifically for receiving and recording the protocol parameter information corresponding with described target terminal that described target MeNB sends, the corresponding protocol parameter information of described and described target terminal is: the protocol parameter information that the described target terminal sent when described target MeNB detects that described target terminal moves in the coverage of described target SeNB is corresponding.
In a kind of embodiment of the embodiment of the present invention, can also comprise with lower module:
Information deletion command reception module, for the delete instruction of the protocol parameter information corresponding for described target terminal that receiving target MeNB sends, described delete instruction is: described target MeNB detects the delete instruction that described target terminal sends when leaving the coverage of described target MeNB;
Protocol parameter information deletion module, for according to the delete instruction that receives, deletes in described routing table the protocol parameter information that the described target terminal that records is corresponding.
In a kind of embodiment of the embodiment of the present invention, the protocol parameter information that described target terminal is corresponding at least comprises: the IP address of the TEID value of described target terminal in described target MeNB, the TEID value of described target terminal in described target SeNB, the UDP port number of described target MeNB, the IP address of described target MeNB and described target SeNB.
In a kind of embodiment of the embodiment of the present invention, described protocol header change module 340, comprising:
IP header change submodule, for the IP address according to the described target SeNB recorded in described routing table, the source IP address of the IP header of described packet is revised as local ip address, the object IP address of IP header is revised as the IP address of described target SeNB, and upgrades the School Affairs of IP header;
UDP header change submodule, for the UDP port number according to the described target MeNB recorded in described routing table, is revised as the UDP port number of described target MeNB, and upgrades the School Affairs of UDP header by the source port number in the UDP header of described packet;
GTP-U header change submodule, for according to the TEID value of the described target terminal recorded in described routing table in described target SeNB, the TEID value in the GTP-U header of described packet is revised as the TEID value of described target terminal in described target SeNB.
The device that the application embodiment of the present invention provides, router receive core net send for after the packet of target terminal, directly be not transmitted to the target MeNB as mobility anchor point MA, but first inquire about the TEID value whether recording in its routing table prestored and comprise in this packet, if Query Result is yes, then represent that this packet does not need target MeNB to carry out the process of PDCP layer, protocol parameter information that can be corresponding according to the target terminal recorded in routing table, change the protocol header of this packet, and by the Packet Generation after change protocol header to target SeNB, route detour problem is produced when avoiding transmitting this kind of packet, reduce the pressure of transmission network and the propagation delay time of user data.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Each embodiment in this specification all adopts relevant mode to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
One of ordinary skill in the art will appreciate that all or part of step realized in said method execution mode is that the hardware that can carry out instruction relevant by program has come, described program can be stored in computer read/write memory medium, here the alleged storage medium obtained, as: ROM/RAM, magnetic disc, CD etc.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a data pack transmission method, is characterized in that, comprising:
Receive the packet for target terminal that core net sends;
Obtain in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised;
Inquire about in the routing table prestored and whether record the TEID value obtained to some extent, wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point;
When Query Result is for being, the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
Described target SeNB is given by the Packet Generation after change protocol header.
2. method according to claim 1, is characterized in that, the protocol parameter information that the described target terminal recorded in described routing table is corresponding is obtained by following steps:
Receive and record the protocol parameter information corresponding with described target terminal that described target MeNB sends, the corresponding protocol parameter information of described and described target terminal is: the protocol parameter information that the described target terminal sent when described target MeNB detects that described target terminal moves in the coverage of described target SeNB is corresponding.
3. method according to claim 1, is characterized in that, deletes in described routing table protocol parameter information corresponding to the described target terminal that records by following steps:
The delete instruction of the protocol parameter information corresponding for described target terminal that receiving target MeNB sends, described delete instruction is: described target MeNB detects the delete instruction that described target terminal sends when leaving the coverage of described target MeNB;
According to the delete instruction received, delete in described routing table the protocol parameter information that the described target terminal that records is corresponding.
4. the method according to any one of claims 1 to 3, it is characterized in that, the protocol parameter information that described target terminal is corresponding at least comprises: the IP address of the TEID value of described target terminal in described target MeNB, the TEID value of described target terminal in described target SeNB, the UDP port number of described target MeNB, the IP address of described target MeNB and described target SeNB.
5. method according to claim 4, is characterized in that, the described protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet, comprising:
According to the IP address of the described target SeNB recorded in described routing table, the source IP address of the IP header of described packet is revised as local ip address, the object IP address of IP header is revised as the IP address of described target SeNB, and upgrades the School Affairs of IP header;
According to the UDP port number of the described target MeNB recorded in described routing table, the source port number in the UDP header of described packet is revised as the UDP port number of described target MeNB, and upgrades the School Affairs of UDP header;
According to the TEID value of the described target terminal recorded in described routing table in described target SeNB, the TEID value in the GTP-U header of described packet is revised as the TEID value of described target terminal in described target SeNB.
6. a data packet transmission device, is characterized in that, comprising:
Packet-receiving module, for receiving the packet for target terminal that core net sends;
TEID value obtains module, for obtaining in described packet the tunnel endpoint identifier TEID value of described target terminal in the MeNB of target macro base station comprised;
TEID value enquiry module, for inquiring about in the routing table that prestores whether record the TEID value obtained to some extent, wherein, described routing table is at least for recording protocol parameter information corresponding to described target terminal, described protocol parameter information comprises: the protocol parameter information relevant to target MeNB and the protocol parameter information relevant with target SeNB, and described target SeNB is: keep with described target terminal micro-base station of being connected using described target MeNB as mobility anchor point;
Protocol header change module, for when the Query Result of described TEID value enquiry module is for being, the protocol parameter information corresponding according to the described target terminal recorded in described routing table changes the protocol header of described packet;
Packet Generation module, for giving described target SeNB by the Packet Generation after change protocol header.
7. device according to claim 6, is characterized in that, also comprises protocol parameter information acquisition module:
Described protocol parameter information acquisition module, specifically for receiving and recording the protocol parameter information corresponding with described target terminal that described target MeNB sends, the corresponding protocol parameter information of described and described target terminal is: the protocol parameter information that the described target terminal sent when described target MeNB detects that described target terminal moves in the coverage of described target SeNB is corresponding.
8. device according to claim 6, is characterized in that, also comprises information deletion command reception module and protocol parameter information deletion module:
Described information deletion command reception module, for the delete instruction of the protocol parameter information corresponding for described target terminal that receiving target MeNB sends, described delete instruction is: described target MeNB detects the delete instruction that described target terminal sends when leaving the coverage of described target MeNB;
Described protocol parameter information deletion module, for according to the delete instruction that receives, deletes in described routing table the protocol parameter information that the described target terminal that records is corresponding.
9. the device according to any one of claim 6 to 8, it is characterized in that, the protocol parameter information that described target terminal is corresponding at least comprises: the IP address of the TEID value of described target terminal in described target MeNB, the TEID value of described target terminal in described target SeNB, the UDP port number of described target MeNB, the IP address of described target MeNB and described target SeNB.
10. device according to claim 9, is characterized in that, described protocol header change module, comprising:
IP header change submodule, for the IP address according to the described target SeNB recorded in described routing table, the source IP address of the IP header of described packet is revised as local ip address, the object IP address of IP header is revised as the IP address of described target SeNB, and upgrades the School Affairs of IP header;
UDP header change submodule, for the UDP port number according to the described target MeNB recorded in described routing table, is revised as the UDP port number of described target MeNB, and upgrades the School Affairs of UDP header by the source port number in the UDP header of described packet;
GTP-U header change submodule, for according to the TEID value of the described target terminal recorded in described routing table in described target SeNB, the TEID value in the GTP-U header of described packet is revised as the TEID value of described target terminal in described target SeNB.
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