CN106535268A

CN106535268A - Message forwarding method and device based on EPC (Evolved Packet Core)

Info

Publication number: CN106535268A
Application number: CN201510583500.7A
Authority: CN
Inventors: 邵方; 薛林; 廖磊; 董乐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-09-14
Filing date: 2015-09-14
Publication date: 2017-03-22
Anticipated expiration: 2035-09-14
Also published as: CN106535268B

Abstract

The embodiment of the invention provides a message forwarding method and device based on an EPC (Evolved Packet Core). The evolved packet core EPC comprises a specific virtual central processing unit VCPU. The method comprises the steps that in a switching preparation phase of S10, after the specific VCPU is triggered, the specific VCPU takes over message forwarding authority from a switching terminal and establishes a specific routing channel for performing message forwarding in an S10 switching process; in a switching performing phase of the S10, the specific VCPU performs the message forwarding in the specific routing channel; and in the switching later phase of the S10, the specific VCPU returns the message forwarding authority to the switching terminal, and the switching terminal performs the message forwarding through adoption of a new routing channel. According to the embodiment of the method and the device, a great deal of burst condition after the S10 switching is finished can be avoided, and a client cannot sense occurrence of the S10 switching.

Description

A kind of message forwarding method and device based on EPC

Technical field

The present invention relates to LTE technical field of data processing, more particularly to a kind of message based on EPC Retransmission method and a kind of apparatus for forwarding message based on EPC.

Background technology

S10 interfaces are between MME (Mobility Management Entity, mobile management entity) Chain of command interface, defines S10 interface definitions, in 3GPP TS29.274 consensus standards with reference to Fig. 1 S10 interface definition schematic diagrames shown in, GTP-C protocol messages are in source Source MME and target Target Transmit between MME.

3GPP TS23.401 standards define complete S10 switching flows, switch with reference to the S10 of Fig. 2 Shown in flow chart：

Step 1-9 is handoff preparation phase, and in this stage, source eNodeB determines to initiate switching, notifies Source MME；Source MME notifies that target MME belonging to target eNodeB, target MME select mesh Mark S-GW (Serving GateWay, gateway) simultaneously asks to create bearing resource, while notifying mesh Mark eNodeB make switching prepare, it is ready after, notify source eNodeB.

Step 10-17 is handover execution stage, and in this stage, source eNodeB notifies that UE is switched over, Thereafter the downlink data message for receiving is transmitted to into target eNodeB；UE accesses target eNodeB, can The downlink data message of target eNodeB forwarding is received, and upstream data can be sent to target eNodeB Message (this message can Jing target S-GW to P-GW (PDN GateWay, public data network gateway))； Target eNodeB notifies that target MME has accessed UE, target MME notify target S-GW initiate to The bearer update of P-GW, hereafter P-GW the downlink data message of user is sent to target S-GW. Wherein, the downlink data message forwarding between eNodeB can be divided into directly forwarding (direct Forwarding (indirect forwarding) is forwarded) and indirectly, directly forwarding is referred to, if source eNodeB With the presence of X2 interface and target eNodeB between, then packet bag is directly in source eNodeB and target Transmit between eNodeB；Otherwise, then forwarded by source S-GW and target S-GW；Using which kind of shape Formula, notifies source MME by source eNodeB.

Step 18-21 is switching later stage, and in this stage, source MME initiates source of release eNodeB With the bearing resource of source S-GW；UE initiates TA (Tracking Area, tracking area) more new technological process (TAU), HSS (Home Subscriber Server, home signature user server) records target MME is identified, and notifies that source MME deletes user data.

Figure it is seen that agreement is more complete to the regulation of signaling plane, when terminal is in target eNobeB On establish UE Context contexts after, service surface is switched under target BS and target MME Even if completing S10 switchings.The process of message when switching for S10, has various implementations at present, Some implementations terminate upper and lower after P-GW points to Target S-GW from Source S-GW, just Text forwarding, carries out according to new forwarding route after completing to switch, but can so cause service surface to stop, Could recover after receiving UE Context Release Complete；Some implementations are to mark off one Individual special internal memory, for carrying out caching message, gets through service surface again and is collected after completing to signaling plane Middle forwarding；Some implementations are that caching function is sunk to base station, complete corresponding caching by base station and turn Send out.

The result that above-mentioned implementation is caused is that handoff procedure has significantly to fall to cheat and interim card, and switching completes it After have the impact of burst big flow and postpone, customer perception is obvious.

The content of the invention

In view of the above problems, it is proposed that the embodiment of the present invention overcomes the problems referred to above or extremely to provide one kind A kind of message forwarding method based on EPC for partially solving the above problems and a kind of based on EPC's Apparatus for forwarding message.

In order to solve the above problems, the embodiment of the invention discloses a kind of message forwarding side based on EPC Method, the core network EPC include specific virtual processor VCPU, and methods described includes：

In the handoff preparation phase of S10, after the specific VCPU is triggered, the specific VCPU The adapter message forwarding authority from switching terminal, and set up for the report is carried out in S10 handoff procedures The specific routing channel of text forwarding；

In the handover execution stage of S10, the specific VCPU is reported in the specific routing channel Text forwarding；

In the switching later stage of S10, message forwarding authority is returned described by the specific VCPU Switching terminal, carries out message forwarding using new routing channel by the switching terminal.

Preferably, methods described also includes：

It is after message forwarding authority is returned the switching terminal by the specific VCPU, described specific Resource shared by VCPU releases.

Preferably, the specific VCPU includes the first specific VCPU and the second specific VCPU, described In the handoff preparation phase of S10, after the specific VCPU is triggered, the specific VCPU from Include the step of adapter message forwarding authority in switching terminal：

In the handoff preparation phase of S10, as the described first specific VCPU and second specific VCPU After being triggered, public data network gateway will be entered using the described second specific VCPU in the specified time period Each message of PGW, is packaged into one or more packets of designated length；

One or more of packets are stored in by preset buffer memory area using the described first specific VCPU In domain.

Preferably, the handoff preparation phase in S10, after the specific VCPU is triggered, institute Stating specific VCPU also includes the step of adapter message forwarding authority from switching terminal：

Specified in the time period using the described first specific VCPU monitoring, into the message transmission speed of PGW Degree, and the average transmission speed of the message of the specified time period is calculated based on the transmission speed；

The handover execution stage in S10, the specific VCPU are entered in the specific routing channel The step of row message is forwarded includes：

In the handover execution stage of S10, using the described first specific VCPU by the buffer zone Packet is transmitted in the specific routing channel according to the average transmission speed.

If the specified time period terminates, actual S10 switchings are no to be occurred, then when updating described specified Between section, continue executing with it is described adopt the second specific VCPU by the specified time period into PGW each Message, is packaged into one or more packets of designated length and described adopts the first specific VCPU will One or more of packets are stored in the step in preset buffer memory region；

According to average transmission speed described in the specified time period adaptive updates.

Preferably, first after the initial time of the specified time period is triggered for the specific VCPU Into the time of the message of PGW；The end time of the specified time is the initial time plus finger The time that timing length is obtained；Wherein,

Specified duration is calculated as follows：Specified duration=front n times history switches the mean value of duration +/- predetermined threshold value；Wherein, the predetermined threshold value is according to the actual duration self-adaptative adjustment of switching.

Preferably, the handoff preparation phase in S10, as the described first specific VCPU and described After two specific VCPU are triggered, public affairs will be entered using the described second specific VCPU in the specified time period With each message of Data Network Gateway PGW, the step of one or more packets of designated length is packaged into Suddenly include：

In the handoff preparation phase of S10, as the described first specific VCPU and second specific VCPU After being triggered, judge to specify each report in the time period into PGW using the described second specific VCPU Whether the length of text is more than or equal to the designated length；

If so, the message is divided into into one or more packets according to the designated length then, if drawing The length of last packet being divided into is less than the designated length, then to described last packet It is filled so that the length of last packet is the designated length；

If it is not, the message to be then packaged into the packet of a designated length.

Preferably, at least packet header of the packet includes：Package number, and/or, the packet Filling position, the message belonging to packet be located at original message position；The bag tail of the packet is extremely Include less：Completeness check code, the completeness check code is for verification data bag after completing in switching Integrality.

Preferably, dynamic updates the size of the buffer zone on demand.

Preferably, it is described set up for carry out in S10 handoff procedures the particular way of the message forwarding by The step of passage, includes：

Original routing table information before S10 switchings is obtained from PGW；

Specific routing channel is set up based on the routing table information, the specific routing channel is to cut in S10 The passage of message forwarding is carried out during changing.

Preferably, it is described that message forwarding authority is returned into the switching terminal in the specific VCPU Afterwards, include the step of resource shared by the specific VCPU releases：

Delete specific routing channel；And,

Delete the data in buffer zone.

The embodiment of the invention also discloses a kind of apparatus for forwarding message based on EPC, the core network EPC includes specific virtual processor VCPU, and described device includes：

Authority adapter module, for the handoff preparation phase in S10, when the specific VCPU is triggered Afterwards, specific VCPU adapter message forwarding authorities from switching terminal, and set up in S10 The specific routing channel of the message forwarding is carried out in handoff procedure；

Packet forwarding module, for the handover execution stage in S10, the specific VCPU is in the spy Message forwarding is carried out in determining routing channel；

Authority returns module, and for the switching later stage in S10, the specific VCPU is by the report Text forwarding authority returns the switching terminal, carries out message using new routing channel by the switching terminal Forwarding.

Preferably, described device also includes：

Resource release module, for message forwarding authority is returned described cutting in the specific VCPU After changing terminal, resource shared by the specific VCPU releases.

Preferably, the specific VCPU includes the first specific VCPU and the second specific VCPU, described Authority adapter module includes：

Encapsulation submodule, for the handoff preparation phase in S10, when the described first specific VCPU and institute State after the second specific VCPU is triggered, will be entered in the specified time period using the described second specific VCPU Enter each message of public data network gateway PGW, be packaged into one or more packets of designated length；

Cache sub-module, for being deposited one or more of packets using the described first specific VCPU Storage is in preset buffer memory region.

Preferably, the authority adapter module also includes：

Transmission speed calculating sub module, for specifying the time period using the described first specific VCPU monitoring It is interior, into the message transmission speed of PGW, and the specified time period is calculated based on the transmission speed Message average transmission speed；

The packet forwarding module includes：

Submodule is forwarded at the uniform velocity, for the handover execution stage in S10, using the described first specific VCPU By the packet in the buffer zone according to the average transmission speed, in the specific routing channel Transmission.

Preferably, the authority adapter module also includes：

Time period updates submodule, and for terminating in the specified time period, actual S10 switchings do not have During generation, the specified time period is updated；

Transmission speed updates submodule, for according to averagely passing described in the specified time period adaptive updates Pass speed.

Preferably, the encapsulation submodule includes：

Judging unit, for the handoff preparation phase in S10, as the described first specific VCPU and described After second specific VCPU is triggered, judges to specify using the described second specific VCPU and enter in the time period Whether enter the length of each message of PGW more than or equal to the designated length；If so, then call and draw Subdivision；If it is not, then calling encapsulation unit；

Division unit, for the message is divided into one or more data according to the designated length Bag, if the length of last packet being divided into be less than the designated length, to it is described last Individual packet is filled so that the length of last packet is the designated length；

Encapsulation unit, for the message to be packaged into the packet of a designated length.

Preferably, dynamic updates the size of the buffer zone on demand.

Preferably, the authority adapter module includes：

Routing table acquisition submodule, for original routing table information before S10 switchings is obtained from PGW；

Path Setup submodule, for setting up specific routing channel, the spy based on the routing table information It is the passage that message forwarding is carried out in S10 handoff procedures to determine routing channel.

Preferably, the resource release module includes：

Passage deletes submodule, for deleting specific routing channel；

Data cached deletion submodule, for deleting the data in buffer zone.

The embodiment of the present invention includes advantages below：

In embodiments of the present invention, virtual processor VCPU is introduced in EPC inside structures, in S10 Switching forwards authority, and foundation switching by the message of independent VCPU adapter switching terminals after starting It is used for carrying out the specific routing channel of message forwarding in journey, in S10 handoff procedures, by VCPU to industry The message in business face is forwarded, the particular way that the embodiment of the present invention is controlled according to VCPU in handoff procedure Message forwarding carried out by passage, it is to avoid the situations that a large amount of bursts are produced after the completion of switching occur, and make client Perceive the generation less than S10 switchings.

Further, since the message forwarding of service surface is taken over by VCPU, after signaling plane is rapidly completed switching Refresh internal forwarding route according to new UE contexts, reduce S10 switchings to service surface forwarding according to Rely, shorten switching time, improve switching efficiency.

Description of the drawings

Fig. 1 is S10 interface definition schematic diagrames in background technology of the invention；

Fig. 2 is S10 switching flow figures in background technology of the invention；

The step of Fig. 3 is a kind of message forwarding method embodiment one based on EPC of present invention flow chart；

The step of Fig. 4 is a kind of message forwarding method embodiment two based on EPC of present invention flow chart；

Fig. 5 is a kind of encapsulation caching of message forwarding method embodiment two based on EPC of the present invention VCPU operation principle schematic diagrams；

Fig. 6 is a kind of structured flowchart of apparatus for forwarding message embodiment based on EPC of the present invention.

Specific embodiment

It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings The present invention is further detailed explanation with specific embodiment.

One of the core concepts of the embodiments of the present invention is VCPU to be introduced in EPC, by VCPU The message forwarding authority of adapter switching terminal, sets up specific routing channel, and in S10 handoff procedures by VCPU carries out message forwarding on specific routing channel, and after the completion of switching, VCPU returns message and turns Send out power, it is to avoid the situations that a large amount of bursts are produced after the completion of switching occur, and the client perception is cut less than S10 The generation changed.

With reference to Fig. 3, a kind of step of message forwarding method embodiment one based on EPC of the present invention is shown Rapid flow chart, wherein, EPC (Evolved Packet Core, core network) including specific VCPU, The embodiment of the present invention specifically may include steps of：

Step 101, it is in the handoff preparation phase of S10, after the specific VCPU is triggered, described Specific VCPU adapter message forwarding authorities from switching terminal, and set up in S10 handoff procedures Carry out the specific routing channel of the message forwarding；

Step 102, in the handover execution stage of S10, the specific VCPU is in the particular way by leading to Message forwarding is carried out in road；

Step 103, in the switching later stage of S10, message forwarding is weighed by the specific VCPU Limit returns the switching terminal, carries out message forwarding using new routing channel by the switching terminal.

With reference to Fig. 4, a kind of step of message forwarding method embodiment two based on EPC of the present invention is shown Rapid flow chart, the embodiment of the present invention are provided with specific VCPU on the basis of EPC frameworks, and VCPU is The Intel Virtualization Technology of CPU, the virtualization of CPU is exactly that list CPU simulation multi -CPUs are parallel, it is allowed to one Platform runs multiple operating systems simultaneously, and application program can be run in separate space And be independent of each other, so as to significantly improve the operating efficiency of computer.

In a preferred embodiment, VCPU arrays can be provided with EPC, for example, design 32 VCPU such as VCPU0 to VCPU31, then specific VCPU can be for S10 switch and from Independent exclusive VCPU is marked off in VCPU arrays.

The embodiment of the present invention can apply to the user plane message forwarding in S10 switching flows, specifically can be with Comprise the steps：

Step 201, it is in the handoff preparation phase of S10, after the specific VCPU is triggered, described Specific VCPU adapter message forwarding authorities from switching terminal, and set up in S10 handoff procedures Carry out the specific routing channel of the message forwarding；

In the handoff preparation phase (i.e. the stage of step 1-9 in Fig. 2) of S10, specific VCPU is touched Send out after, can by specific VCPU adapter user planes from switching terminal message (such as UDP, TCP message) forwarding authority, in one embodiment, according to the flow chart of Fig. 2, as Target MME After Handover Request have been issued to Target eNode, can be touched by Handover Request The user plane forwarding capability for sending out VCPU adapter switching terminals specific.

The embodiment of the present invention is applied to, specific VCPU can at least there are two, including the first specific VCPU And the second specific VCPU, wherein the first specific VCPU completes the function of traffic shaping, second is specific VCPU completes the function of encapsulating caching.

It should be noted that the first specific VCPU and the second specific VCPU can be exclusive control machines Complete independently logical operation processed and the exclusive VCPU of control function, i.e., the first specific VCPU are flow Shaping is exclusive, and the second specific VCPU is exclusive for encapsulation caching；Or, the first specific VCPU and Two specific VCPU can also be compound VCPU, and each VCPU is compound to share that several functions are various to patrol Volume, the embodiment of the present invention is not restricted to this, in VCPU resources than in the case of more saturated, can be with excellent Choose and state first kind of way, to accelerate data-handling efficiency.

In a kind of preferred embodiment of the embodiment of the present invention, step 201 can include following sub-step：

Sub-step S11, in the handoff preparation phase of S10, as the described first specific VCPU and described After two specific VCPU are triggered, will enter PGW's in the specified time period using the second specific VCPU Each message, is packaged into one or more packets of designated length；

Cannot be estimated due to system and when produce S10 switchings, if report is just proceeded by when S10 is produced The process of the data such as text, the then time difference that the time of processing data is formed so that user perceives obvious.Base In this, the embodiment of the present invention is predicted to the S10 switchings that may be arrived, and prediction during estimation switching is cut Time and prediction switching duration are changed, the data of prediction switching duration are pre-processed.

Specifically, the embodiment of the present invention will predict that switching time and prediction switching duration are used and specify the time period Represent, after the initial time of the specified time period is triggered for VCPU, (i.e. Target MME are issued After Handover Request) first time into the message of PGW, the end time is starting The time that time is obtained plus prediction switching duration (specified duration i.e. of the invention).

In implementing, it is intended that duration can be calculated as follows：Specified duration=front n times are gone through History switches the +/- predetermined threshold value of mean value of duration；Specifically, as S10 switches duration according to system shape Condition changes within the specific limits, if being not provided with threshold value, when the S10 switching deadlines are long, can lead Cause message to distribute S10 switchings also not terminate, client remains to feel that download suspends；S10 switchings are completed When time is too short, after S10 switchings can be caused to complete, message is not also distributed, and client remains to feel stream Amount is increased sharply.Therefore, method of the embodiment of the present invention using threshold check, arranges predetermined threshold value, and this is preset Threshold value allows prediction switching duration to be fluctuated on the basis of front n times history switches the mean value of duration up and down, To complete message protection, prevent from transmitting too early or too late.

The initial threshold of the predetermined threshold value can be an empirical value, and in subsequent applications, which can be according to cutting Change actual duration self-adaptative adjustment.For example, switch average duration calculation according to 10 S10 history of past Prediction switching duration, a length of 300ms of mean time of first 9 times, a length of 500ms during the switching of the 10th time, Then the mean value of the history switching duration of first 10 times is 320ms ((300*9+500)/10), it can be seen that Change value between the mean value of first 9 times and the mean value of first 10 times is 20ms, if initial threshold is 30ms, can now be adjusted to 20ms, to improve the accuracy of prediction switching duration.

In implementing, in above-mentioned formula, predetermined threshold value is to increase, or reduces predetermined threshold value, can Make to judge to refer to the last switching duration, if the prediction switching time length ratio reality of the last time S10 switchings Border switching duration is early, then taking increases the strategy of threshold value；Otherwise, take the strategy for reducing threshold value.

The embodiment of the present invention is applied to, if prediction there will be S10 to switch, the second specific VCPU can be with Each message in the specified time period before switching to S10 into PGW carries out burst process, obtains To one or more packets of designated length.In a kind of preferred embodiment of the embodiment of the present invention, son Step S11 can further include following sub-step：

Sub-step S111, in the handoff preparation phase of S10, as the described first specific VCPU and described After second specific VCPU is triggered, judge to specify entrance in the time period with the described second specific VCPU Whether the length of each message of PGW is more than or equal to the designated length；If so, then perform sub-step Rapid S112；If it is not, then performing sub-step S113；

The message is divided into one or more packets according to the designated length by sub-step S112, If the length of last packet being divided into is less than the designated length, to described last number It is filled according to bag so that the length of last packet is the designated length；

The message is packaged into the packet of a designated length by sub-step S113.

Specifically, with reference to shown in the encapsulation caching VCPU operation principle schematic diagrams of Fig. 5, will can enter Each message for entering PGW regards variable-length packet as, and the length of each message and designated length are opposed Than if message length is more than or equal to the designated length, the message being defined as long bag；Otherwise, if Message length is less than the designated length, then the message is defined as short bag.In burst, selection has long bag Effect position is marked, and makes the complete transmission of long bag, for the length of last packet after long packet fragmentation If being less than designated length, process according to short bag strategy；For short bag, room is filled, and record is having Effect position, ensures to transmit by original message when using group.For example, 1 long packet fragmentation is into three fixed length bags, In packet header flag data packet number 1,2,3, and when the 3rd packet is short bag, in high-order benefit Zero padding, and the position of its zero padding is marked in packet header, and, the message belonging to the packet is located at original The position of beginning message.

As shown in figure 5, each message inside PGW packed caching VCPU (i.e. second is specific VCPU) it is divided into isometric packet sequence.Additionally, completeness check code is set in bag tail, with switching The integrality of verification data bag after completing, it is ensured that data transfer is errorless after the completion of S10 switchings.

In actual applications, the designated length of packet segment can be with self adaptation computing, not fixed value, In order to control during read-write cache to internal memory.Wherein, as a kind of example, affect its self adaptation computing Factor can include：The quantity of message and shared internal memory in buffer zone, single Bao Wenchang of fixed packet length Degree, the burst and mark of long bag, the high-order zero padding of short bag and mark etc..

The embodiment of the present invention is processed to message by the way of the long burst of bag is specified, so all of report Text is divided into isometric packet sequence inside PGW regardless of original bag length and flow, can The accurate number for calculating message, is easy to flow control in transmittance process, reduces the number of times of read/write memory.

One or more of packets are stored in default by sub-step S12 using the first specific VCPU In buffer zone.

Message in the specified time period is divided into second specific VCPU the sequence of data packet of designated length After, the sequence of data packet is stored in preset buffer memory region successively by the first specific VCPU.Wherein, The size of the buffer zone is also and random length, but dynamic updates on demand, by traffic shaping VCPU (the One specific VCPU) centralized management, busy increase, idle release prevent internal memory from overflowing and ensureing to process It is optimal, increases the security of handoff procedure so that service surface is no longer uncontrollable in handoff procedure.

In a kind of preferred embodiment of the embodiment of the present invention, step 201 can also include following sub-step：

Sub-step S13, is specified in the time period, into the report of PGW using the first specific VCPU monitoring Literary transmission speed, and the average transmission speed of the message of the specified time period is calculated based on the transmission speed Degree.

The embodiment of the present invention is applied to, cycle tiemr can be arranged based on the first specific VCPU, this follows The work period of ring timer as specifies the time period, can start front finger to switching using cycle tiemr Fix time in section, the transmission speed into the message of PGW is monitored.In implementing, circulation Timer can call corresponding counter on PGW when speed is monitored.

As the transmission speed of message in a mobile network is extremely difficult at the uniform velocity, therefore the embodiment of the present invention can With the transmission speed of message in the specified time period based on monitoring acquisition, the message of the specified time period is calculated Average transmission speed, using the average transmission speed as packet in handoff procedure transfer rate, with Guarantee the at the uniform velocity transmission of packet, it is ensured that transfer rate is the true transfer rate before switching during switching.

Sub-step S14, if the specified time period terminates, actual S10 switchings are no to be occurred, then more The new specified time period, continue executing with and described adopt the second specific VCPU enter in the specified time period Each message of PGW, is packaged into one or more packets of designated length and described adopts first One or more of packets are stored in the step in preset buffer memory region by specific VCPU；

Sub-step S15, according to average transmission speed described in the specified time period adaptive updates.

In embodiments of the present invention, if specifying the time period to terminate, that is, predict that switching time reaches, but it is actual S10 switchings not do not occur, now, the switching of the first specific VCPU early warning generation does not arrive, Then cycle tiemr can be updated with dynamic, update and specify the time period, for example, increase respective threshold.

In addition, in addition it is also necessary to update S10 switching pre-processings (specified time period correspondence of the specified time period Message carry out the process of burst and buffer memory, it is ensured that data it is not expired), and, dynamic updates Average transmission speed, is the true transfer rate before switching with transfer rate during guaranteeing switching.

In addition, the first specific VCPU can produce the terminal affected when S10 switches with dynamic refresh List information, for example, for the terminal that each S10 switching may be influenced whether, have indicator index The data of its route and caching process are pointed to, above-mentioned route and data are refreshed.

In embodiments of the present invention, specific VCPU is gone back from switching terminal during adapter message forwarding authority Exclusive specific routing channel can be set up, the specific paths are to be cached in S10 handoff procedures The passage of packet forwarding in region.In one embodiment, specific routing channel can pass through as follows Mode is set up：Original routing table information before S10 switchings is obtained from PGW；Based on the routing table Information sets up specific routing channel, and the specific routing channel is to carry out message to turn in S10 handoff procedures The passage sent out.

In implementing, when S10 switchings start, original forwarding routing channel in agreement, can be deleted, Forwarded according to new routing channel after the completion of switching so that stop message in S10 handoff procedures and turn Send out, after the completion of switching, have a large amount of bursts, user perceives obvious.In order to overcome the problem, in the present invention In embodiment, specific VCPU can obtain original routing table information before S10 switchings from the middle of PGW (routing table is three layers of converting route), is set up for switching in S10 based on the routing table information The special specific routing channel (i.e. L3 forwarding tunnels) of message forwarding is carried out in journey, and completes the tunnel Qos functions, with handoff procedure maintain message forwarding.

Step 202, in the handover execution stage of S10, the specific VCPU is in the particular way by leading to Message forwarding is carried out in road；

In one embodiment, step 202 is specifically as follows：In the handover execution stage of S10, adopt With the described first specific VCPU by the packet in buffer zone according to the average transmission speed, in spy Transmit in determining routing channel.

According to embodiments of the present invention, in S10 handoff procedures, up-downgoing service message no longer shows as letter Single fixed caching fifo mode, and can be to the data in buffer zone by the first specific VCPU The read-write of bag is managed, and the team that goes out of the packet in buffer zone is joined the team and is scheduled, it is ensured that UDP, TCP message is accurately sent to purpose terminal according to original sequential.

In the handover execution stage of S10, the first specific VCPU adopts cycle counter to up-downgoing message The average transmission speed of caching, the bag that fetches data from buffer zone carry out up-downgoing on specific routing channel Transmission, it is to avoid packet loss, fall hole or big flow burst situation occur, in big flow, the application of high-fidelity Central, terminal use will not perceive speed and change, make due to obtaining service message at the uniform velocity S10 is smoothed in the case of switching in user's unaware and is completed, and proceeds related service, for example, is used Interim card and the distortion of business will not be experienced when using terminal watches video and voice in family, if observation Downloading process, not can be appreciated that time-out and the burst of flow yet.

Step 203, in the switching later stage of S10, message forwarding is weighed by the specific VCPU Limit returns the switching terminal, carries out message forwarding using new routing channel by the switching terminal；

In the switching later stage of S10, the message forwarding authority of the user plane is returned by specific VCPU Switching terminal, carries out message forwarding using new routing channel by switching terminal.In one embodiment, According to the flow chart of Fig. 2, can promote specific after UE Context Release Complete are received VCPU returns message forwarding authority.

Taken over by VCPU as service surface is forwarded, signaling plane is rapidly completed after switching according to new UE Context refreshes internal forwarding route, reduces dependence of the S10 switchings to service surface forwarding, shortens and cut The time is changed, switching efficiency is improve.

Step 204, resource shared by the specific VCPU releases.

In order to save internal memory, after the completion of S10 switchings, specific VCPU can discharge shared resource, Including the memory source shared by the VCPU, for example, specific routing channel is deleted, specific routing channel is The occasional passage of message forwarding is carried out in handoff procedure, after the completion of switching, its work has been completed, Therefore, it can delete the specific routing channel, with resource shared by release channel；Or, delete buffer area Data in domain, are bursty datas in handoff procedure due to what is stored in buffer zone, therefore, cutting Change after completing, the data in buffer zone can be deleted, to give back shared memory headroom, etc..

It should be noted that for embodiment of the method, in order to be briefly described, therefore which is all expressed as one it is The combination of actions of row, but those skilled in the art should know, and the embodiment of the present invention is not by described Sequence of movement restriction because according to the embodiment of the present invention, some steps can using other orders or Person is carried out simultaneously.Secondly, those skilled in the art should also know, embodiment described in this description Preferred embodiment is belonged to, necessary to the involved action not necessarily embodiment of the present invention.

With reference to Fig. 6, a kind of structure of apparatus for forwarding message embodiment based on EPC of the present invention is shown Block diagram, core network EPC include specific virtual processor VCPU, described device can specifically include as Lower module：

Authority adapter module 601, for the handoff preparation phase in S10, when the specific VCPU quilts After triggering, the specific VCPU from switching terminal adapter message forwarding authority, and set up for The specific routing channel of the message forwarding is carried out in S10 handoff procedures；

Packet forwarding module 602, for the handover execution stage in S10, the specific VCPU is in institute Message forwarding is carried out in stating specific routing channel；

Authority returns module 603, and for the switching later stage in S10, the specific VCPU is by institute State message forwarding authority and return the switching terminal, carried out using new routing channel by the switching terminal Message is forwarded.

In a kind of preferred embodiment of the embodiment of the present invention, described device also includes：

In a kind of preferred embodiment of the embodiment of the present invention, the specific VCPU includes that first is specific VCPU and the second specific VCPU, the authority adapter module 601 include：

In a kind of preferred embodiment of the embodiment of the present invention, the authority adapter module also includes：

The packet forwarding module 602 includes：

In a kind of preferred embodiment of the embodiment of the present invention, the authority adapter module 601 also includes：

In a kind of preferred embodiment of the embodiment of the present invention, the initial time of the specified time period is institute State first time into the message of PGW after specific VCPU is triggered；The knot of the specified time The beam time is the initial time plus the time for specifying duration to obtain；Wherein,

In a kind of preferred embodiment of the embodiment of the present invention, the encapsulation submodule includes：

In a kind of preferred embodiment of the embodiment of the present invention, at least packet header of the packet includes：Number According to packet number, and/or, the filling position of the packet, the message belonging to packet are located at original message Position；The bag tail of the packet at least includes：Completeness check code, the completeness check code are used The integrality of verification data bag after completing in switching.

In a kind of preferred embodiment of the embodiment of the present invention, dynamic is more on demand for the size of the buffer zone Newly.

In a kind of preferred embodiment of the embodiment of the present invention, the authority adapter module 601 includes：

In a kind of preferred embodiment of the embodiment of the present invention, the resource release module includes：

Passage deletes submodule, for deleting specific routing channel；

Data cached deletion submodule, for deleting the data in buffer zone.

For device embodiment, due to itself and above-mentioned embodiment of the method basic simlarity, so description It is fairly simple, related part is illustrated referring to the part of embodiment of the method.

Each embodiment in this specification is described by the way of progressive, and each embodiment is stressed Be all difference with other embodiment, between each embodiment identical similar part mutually referring to .

Those skilled in the art are it should be appreciated that the embodiment of the embodiment of the present invention can be provided as method, dress Put, or computer program.Therefore, the embodiment of the present invention can using complete hardware embodiment, completely Software implementation or the form with reference to the embodiment in terms of software and hardware.And, the embodiment of the present invention Can be situated between with storage using the computer for wherein including computer usable program code at one or more The computer journey implemented in matter (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) The form of sequence product.

The embodiment of the present invention be with reference to method according to embodiments of the present invention, terminal device (system), and meter The flow chart and/or block diagram of calculation machine program product is describing.It should be understood that can be by computer program instructions Each flow process and/or square frame and flow chart and/or square frame in flowchart and/or block diagram The combination of flow process and/or square frame in figure.Can provide these computer program instructions to all-purpose computer, The processor of special-purpose computer, Embedded Processor or other programmable data processing terminal equipments is producing One machine so that by the computing device of computer or other programmable data processing terminal equipments Instruction produce for realizing in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or The device of the function of specifying in multiple square frames.

These computer program instructions may be alternatively stored in and computer or other programmable datas can be guided to process In the computer-readable memory that terminal device is worked in a specific way so that be stored in the computer-readable Instruction in memory is produced and includes the manufacture of command device, and command device realization is in flow chart one The function of specifying in flow process or one square frame of multiple flow processs and/or block diagram or multiple square frames.

These computer program instructions can also be loaded into computer or other programmable data processing terminals set It is standby upper so that on computer or other programmable terminal equipments, execution series of operation steps is in terms of producing The process that calculation machine is realized, so as to the instruction performed on computer or other programmable terminal equipments provides use In realization in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames The step of function of specifying.

Although having been described for the preferred embodiment of the embodiment of the present invention, those skilled in the art are once Basic creative concept is known, then other change and modification can be made to these embodiments.So, Claims are intended to be construed to include preferred embodiment and fall into the institute of range of embodiment of the invention Have altered and change.

Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms It is used merely to an entity or operation are made a distinction with another entity or operation, and not necessarily requires Or imply these entities or there is any this actual relation or order between operating.And, art Language " including ", "comprising" or its any other variant are intended to including for nonexcludability, so that A series of process, method, article or terminal device including key elements not only includes those key elements, and Also include other key elements for being not expressly set out, or also include for this process, method, article or The intrinsic key element of person's terminal device.In the absence of more restrictions, " include one by sentence It is individual ... " key element that limits, it is not excluded that at the process including the key element, method, article or end Also there is other identical element in end equipment.

Above a kind of message forwarding method and device based on EPC provided by the present invention has been carried out in detail Thin to introduce, specific case used herein is set forth to the principle and embodiment of the present invention, with The explanation of upper embodiment is only intended to help and understands the method for the present invention and its core concept；Simultaneously for One of ordinary skill in the art, the thought of the foundation present invention, in specific embodiments and applications Will change, in sum, this specification content should not be construed as limiting the invention.

Claims

1. a kind of message forwarding method based on EPC, it is characterised in that the core network EPC bags Specific virtual processor VCPU is included, methods described includes：

2. method according to claim 1, it is characterised in that also include：

3. method according to claim 1, it is characterised in that the specific VCPU includes One specific VCPU and the second specific VCPU, the handoff preparation phase in S10, when described specific After VCPU is triggered, the specific VCPU is wrapped the step of adapter message forwarding authority from switching terminal Include：

4. method according to claim 3, it is characterised in that the switching in S10 prepares In the stage, after the specific VCPU is triggered, the specific VCPU takes over report from switching terminal The step of text forwarding authority, also includes：

5. method according to claim 3, it is characterised in that the switching in S10 prepares In the stage, after the specific VCPU is triggered, the specific VCPU takes over report from switching terminal The step of text forwarding authority, also includes：

6. the method according to claim 3 or 4 or 5, it is characterised in that the specified time The initial time of section is first time into the message of PGW after the specific VCPU is triggered； The end time of the specified time is the initial time plus the time for specifying duration to obtain；Wherein,

7. method according to claim 3, it is characterised in that the switching in S10 prepares Stage, after the described first specific VCPU and the second specific VCPU are triggered, using described Each message in the specified time period into public data network gateway PGW is sealed by the second specific VCPU The step of one or more packets for dressing up designated length, includes：

8. method according to claim 7, it is characterised in that at least packet header of the packet Including：Package number, and/or, the filling position of the packet, the message belonging to packet are located at The position of original message；The bag tail of the packet at least includes：Completeness check code, the integrality Integrality of the check code for verification data bag after completing in switching.

9. the method according to claim 3 or 4 or 6 or 7 or 8, it is characterised in that described Dynamic updates the size of buffer zone on demand.

10. method according to claim 1, it is characterised in that the foundation is for cutting in S10 The step of specific routing channel that the message forwarding is carried out during changing, includes：

11. methods according to claim 2, it is characterised in that described in the specific VCPU Message forwarding authority is returned after the switching terminal, resource shared by the specific VCPU releases Step includes：

Delete specific routing channel；And,

Delete the data in buffer zone.

A kind of 12. apparatus for forwarding message based on EPC, it is characterised in that the core network EPC Including specific virtual processor VCPU, described device includes：

13. devices according to claim 12, it is characterised in that also include：

14. devices according to claim 12, it is characterised in that the specific VCPU includes First specific VCPU and the second specific VCPU, the authority adapter module include：

15. devices according to claim 14, it is characterised in that the authority adapter module is also Including：

The packet forwarding module includes：

16. devices according to claim 14, it is characterised in that the authority adapter module is also Including：

17. devices according to claims 14 or 15 or 16, it is characterised in that described to specify The initial time of time period be after the specific VCPU is triggered first into PGW message when Between；The end time of the specified time is the initial time plus the time for specifying duration to obtain；Its In,

18. devices according to claim 14, it is characterised in that the encapsulation submodule includes：

19. devices according to claim 18, it is characterised in that at least bag of the packet Head includes：Package number, and/or, the filling position of the packet, the message position belonging to packet In the position of original message；The bag tail of the packet at least includes：Completeness check code is described complete Property check code for switching complete after verification data bag integrality.

20. devices according to claims 14 or 15 or 17 or 18 or 19, it is characterised in that Dynamic updates the size of the buffer zone on demand.

21. devices according to claim 12, it is characterised in that the authority adapter module bag Include：

22. devices according to claim 13, it is characterised in that the resource release module bag Include：

Passage deletes submodule, for deleting specific routing channel；

Data cached deletion submodule, for deleting the data in buffer zone.