CN102083144B - Method and system for distinguishing network link type for data cache unit - Google Patents

Method and system for distinguishing network link type for data cache unit Download PDF

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Publication number
CN102083144B
CN102083144B CN200910241579.XA CN200910241579A CN102083144B CN 102083144 B CN102083144 B CN 102083144B CN 200910241579 A CN200910241579 A CN 200910241579A CN 102083144 B CN102083144 B CN 102083144B
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data
mobility management
type
local
management unit
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CN102083144A (en
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王静
周娜
梁爽
霍玉臻
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/76—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/78—Architectures of resource allocation
    • H04L47/782—Hierarchical allocation of resources, e.g. involving a hierarchy of local and centralised entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/63—Routing a service request depending on the request content or context
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/14—Multichannel or multilink protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/824—Applicable to portable or mobile terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method for distinguishing a network link type for a data cache unit, comprising: when a mobility management unit builds network link, notifying the network link type to a data cache unit; and performing or indicating the mobility management unit to release resource according to the network link type by the data cache unit. The invention discloses a system for distinguishing a network link type for a data cache unit, comprising a notification module and a release module, wherein the notification module notifies the network link type to the release unit on the data cache unit side when the mobility management unit builds the network link, and the release modules performs or indicates the mobility management unit to release resource according to the network link type. The method and the system can effectively release resource reserved by forwarding links, and improve the resource utilization ratio of a core network element.

Description

A kind of method and system of distinguishing network link type for data cache unit
Technical field
The present invention relates to the mobile communication technology field, relate in particular to the method and system of distinguishing network link type for data cache unit under a kind of local IP access function service condition.
Background technology
In order to keep the competitiveness of 3-G (Generation Three mobile communication system) in the communications field, for the user provides, speed is faster, lower, the more personalized Mobile Communication Service of time delay, simultaneously, reduce the operation cost of operator, third generation partner program (3GPP, 3rd Generation Partnership Project) the standard operation group just is being devoted to the research of evolved packet system (EPS, Evolved Packet System).Be illustrated in figure 1 the structural representation of EPS system, in Fig. 1, whole EPS system is divided into wireless access network and core net two parts, relates to English Chinese in Fig. 1 and asks for an interview the last Unified Explanation of word.In core net, home subscriber server, Mobility Management Entity, service universal packet wireless business business (GPRS) support node, policy charging rule functional entity, gateway, packet data gateway and packet data network have been comprised.Below detailed functions:
Home subscriber server, be the permanent storage place of user contracting data, is positioned at the signing home network of user.
Mobility Management Entity, be the storage place of user contracting data in current network, be responsible for the Non-Access Stratum signaling management of terminal to network, the safety verification function of terminal, mobile management, the tracking under user's idle pulley and paging management function and the bearer management of terminal.
Serving GPRS Support Node, be the business support point of GERAN and UTRAN user access core network network, similar with Mobility Management Entity on function, is responsible for user's the functions such as position renewal, paging management and bearer management.Wherein, GERAN is the wireless access part of GSM/EDGE, with GSM EDGERadio Access Network, means; UTRAN is wireless access on global land, with UniversalTerrestrial Radio Access, means.
Gateway, be the gateway that core net arrives wireless system, is responsible for terminal to the user plane bearer of core net, the data buffer storage under the terminal idle pulley, function, Lawful Interception and packet routing and the forwarding capability of network side initiating business request; Gateway is responsible for the situation that the counting user terminal is used wireless network, and produces the ticket that terminal is used wireless network, sends charging gateway to.
Packet data gateway, be the gateway of evolution system and this system external packet data network, and it is connected on internet and packet data network, the functions such as the IP address assignment of responsible terminal, billing function, grouping packet filtering, policy control.
Packet data network, be the IP operation network of operator, and this network provides the IP service by the core net of operator for the user.
Policy charging rule functional entity is the server of being responsible for providing charging control, online credit control, thresholding control, service quality (QoS, Quality ofService) tactful aspect rule in evolution system.
Wireless access network, by evolution base station (eNB, E-UTRAN NodeB) and 3G radio network controller (RNC, Radio Network Control) form, it mainly is responsible for the transmitting-receiving of wireless signal, by air interface and terminal contact, Radio Resource, scheduling of resource, the access control of management air interface.
Above-mentioned Serving GPRS Support Node is the Serving GPRS Support Node of upgrading, can support and gateway between the S4 interface, and and Mobility Management Entity between adopt the GTPv2 agreement to carry out intercommunication.And, for the Serving GPRS Support Node of supporting the 3G core net, data field (PS) the territory network architecture and Fig. 1 are different, now, between Serving GPRS Support Node and Mobility Management Entity, adopt gn interface to be connected, intercommunication employing GTPv1 agreement.Service GPRS Zhi Chijie can not be connected with gateway, is connected to Gateway GPRS Support Node by gn interface and directly carries out the packet data network access.
The Home eNodeB of Home eNodeB or evolution is small-sized, the lower powered base station of a class, dedicated resources as the certain user, being deployed in the private sites such as family, group, company or school uses, be mainly for higher service rate being provided to the user and reducing and use the needed expense of high rate services, make up the deficiency that existing distributed cellular radio communication system covers simultaneously.The advantage of Home eNodeB is economical, convenient, low-power output, plug and play, broadband access, use single-mode terminal etc.
Home eNodeB can be directly connected to core net, and as shown in Figure 2, here, the wireless side network element in Fig. 2 can be Home eNodeB; Home eNodeB also can be linked into core net by this logical ne of femto gateway, and as shown in Figure 3,4, here, the wireless side network element in Fig. 3,4 can be Home eNodeB.Wherein, the femto gateway major function is: the fail safe of checking Home eNodeB, process the registration of Home eNodeB, and Home eNodeB is carried out to operation maintenance management, according to Carrier Requirements configuration and control Home eNodeB, be responsible for the data of exchcange core net and Home eNodeB.
In order to realize the local IP access function, i.e. this locality access of terminal to the IP device in other IP devices of home network, enterprise network or internet, set up the local access network pass, as shown in Figure 2,3, 4.Setting up that local access network closes can provide providing powerful support for the local IP access technology, local access network close can and the wireless side network element close and establish or near the wireless side network element (external), also can and home base-station gateway close and establish or near the family expenses base-station gateway (external).It can be L-SGW (local SGW, Local SGW), local L-PGW (local PGW, Local PGW), L-GGSN (local GGSN, Local GGSN), external L-GW (Local GW) etc. that local access network closes.
Fig. 5 has shown in the mobile communications network framework, the data flow path of local IP access and the access of traditional core net.User for supporting local IP access, can set up traditional core net visit data path and local IP access data path.As shown in Figure 5, for the connection of local IP access, the local IP access data path closes (L-SGW, L-PGW, L-GGSN) from terminal to the wireless side network element to local access network, and transfer of data is without core net.In order to realize the local IP access of terminal to other IP devices of home network or internet, can set up two connections, article one local IP access data path is directly accessed ，Ji the Internet, the Internet local IP access and is connected.Second local IP access data path is directly accessed other IP devices of home network, and the home network local IP access connects.
After Figure 5 shows that the user sets up the local IP access connection, the transmission path of local IP access data under connection status.When the user does not have for a long time the local IP access data receiver or sends, the wireless side network element can discharge to eat dishes without rice or wine to connect and make the user enter idle condition.If now there is again user's local IP access downlink data to arrive, local access network closes the gateway send data to core net and carries out buffer memory, by subscriber paging during to connection status by the data distributing of buffer memory, can guarantee that in this way the local IP access downlink data do not lose, for the user provides good service-aware.In particular user state transitions situation, data transfer path is as shown in the schematic diagram of Fig. 6,7,8 each scenes.Wherein, Figure 6 shows that the data path schematic diagram of user when connection status; Figure 7 shows that the downlink data buffer memory schematic diagram of user when idle condition; Data path schematic diagram while Figure 8 shows that subscriber paging to connection status.Scene shown in Fig. 6 is the scene shown in Fig. 7 after entering idle condition; Scene shown in Fig. 7 is the scene shown in Fig. 8 after entering connection status.
For the data path schematic diagram shown in Fig. 8, as shown in Figure 9, the renewal process of this data path comprises the following steps concrete data path renewal process:
Step 501, due to the user, when the idle condition, the core network mobility management entity is transferred to core-network side by the downlink tunnel of local IP access, when local access network closes while receiving downlink data, just data is sent to the core net gateway and carries out buffer memory.
Step 502, gateway is informed the core network mobility management entity by downlink data notification message after receiving downlink data.
Step 503, trigger paging in the wireless side network element of core network mobility management entity in the user registration area coverage.
Step 504, the user receives that beep-page message passes through the paging of initiating business request message response.
Step 505, the core network mobility management entity is set up empty port load-supporting for the user, at initial context, sets up in request message, and the uplink tunnel sign of all built links, safe context, radio bearer Qos parameter etc. are sent to the wireless side network element.
Step 506, the wireless side network element is according to the indication information foundation of core net and the radio bearer between the terminal use.
Step 507, the wireless side network element, after empty port load-supporting has been set up, has been set up message by initial context, and downlink tunnel sign and address information are informed to the core network mobility management entity.
Step 508, the core network mobility management entity, by revising bearing request message, brings the local access network pass by downlink tunnel sign and address information.
Step 509, local access network closes to reply revises bearing response message.
Step 510, the wireless side network element is learnt the uplink tunnel sign in the direct tunnel of local IP access by step 505, local access network close the downlink tunnel that obtains the direct tunnel of local IP access by step 508 identify local IP access up-downgoing data can normal transmission.
Step 511, the core network mobility management entity, by revising bearing request message, brings gateway by downlink tunnel sign and address information.
Step 512, gateway is replied and is revised bearing response message.
Step 513, gateway is sent to the user by the downlink data of buffer memory after receiving downlink tunnel sign and address information, and user's local IP access upstream data sends by step 510, no longer passes through gateway.
In existing implementation procedure, when receiving the downlink data of sending from the core net IAD, also can carry out gateway the described step of this process, even if do not have local IP access data core network mobility administrative unit also can set up the forwarding of local IP access and direct data channel, when follow-up, when being arranged, the local IP access data can directly apply.At the data cached data retransmission link afterwards that is sent of descending local IP access, can be initiated to discharge by the core network mobility administrative unit, concrete erasing time can guarantee by timer is set.But this implementation is not optimized, because even if downlink data is while only being core network data, the core network mobility administrative unit still needs to set up the conversion link of local IP access data, and at the situation next stage property reserved data link circuit resource data cached without local IP access, that is to say, can not discharge in time reserved resource, the problem that this can cause the resource utilization of core network element to reduce, still do not have effective solution for this problem at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system of distinguishing network link type for data cache unit, can effectively carry out the release of the reserved resource of conversion link, improve core network element resource utilization.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of distinguishing network link type for data cache unit, the method comprises: mobility management unit is when setting up network linking, by the type notification data buffer storage unit of described network linking; Described data buffer storage unit is carried out according to the type of described network linking or indication mobility management unit releasing resource.
Wherein, after described data buffer storage unit is known the type of described network linking, preserve the type of described network linking in this locality.
Wherein, described data buffer storage unit is carried out according to the type of described network linking or is indicated the mobility management unit releasing resource specifically to comprise:
When described data buffer storage unit when network linking receives downlink data, according to the type of the described network linking of preserving, the data type of judging described downlink data is core network data or local data or comprises core network data and local data; According to the difference of judged result, carry out respectively or indicate mobility management unit to carry out the operation of corresponding releasing resource.
Wherein, when the data type of judging described downlink data when described data buffer storage unit is core network data, carry out or the operation of indication mobility management unit releasing resource specifically comprises:
By data buffer storage unit, the conversion link resource of local and core network mobility administrative unit is discharged; Perhaps,
Data buffer storage unit can characterize the information notification mobility management unit of downlink data type, by mobility management unit, the conversion link resource in local and data buffer storage unit be discharged.
Wherein, the information of described sign downlink data type comprises: in the downlink data type indication of access gateway address, IAD sign, new definition at least one.
Wherein, when the data type of judging described downlink data when described data buffer storage unit is local data, the operation that the indication mobility management unit is carried out releasing resource specifically comprises:
Data buffer storage unit is informed mobility management unit by normal downlink data notification message;
Open the conversion link timer by mobility management unit, discharge the conversion link resource after the conversion link timer expiry; Perhaps,
The data type of judging described downlink data when described data buffer storage unit is when comprising core network data and local data, and the operation of the releasing resource that the indication mobility management unit is carried out specifically comprises:
Data buffer storage unit is informed mobility management unit by normal downlink data notification message;
Open the conversion link timer by mobility management unit, discharge the conversion link resource after the conversion link timer expiry.
Wherein, described network linking type comprises: in core net link, local links at least one.
A kind of system of distinguishing network link type for data cache unit, this system comprises: the release module of the notification module of mobility management unit side and data buffer storage unit side; Wherein,
Notification module, for mobility management unit when setting up network linking, by the release module of the type notification data buffer storage unit side of described network linking;
Release module, carry out or indication mobility management unit releasing resource for the type according to described network linking.
Wherein, this system also comprises: the preservation module of data buffer storage unit side, know the type of described network linking for data buffer storage unit after, preserve the type of described network linking in this locality.
Wherein, described release module further comprises: acquisition module, judge module and release Executive Module; Wherein,
Acquisition module, for when when network linking receives downlink data, obtain the type of preserving the described network linking that module preserves;
Judge module, the data type of judging described downlink data for the type according to described network linking is core network data or local data or comprises core network data and local data;
Discharge Executive Module, for the difference according to judged result, carry out respectively or indicate mobility management unit to carry out the operation of corresponding releasing resource.
Mobility management unit of the present invention is when setting up network linking, by the type notification data buffer storage unit of network linking; Data buffer storage unit is carried out according to the type of network linking or indication mobility management unit releasing resource.
Adopt the present invention, because data buffer storage unit can be known the type of network linking, therefore, can effectively carry out the release of the reserved resource of conversion link, improve core network element resource utilization, that is to say, improve the core net carrying disposal ability of core network element.
The accompanying drawing explanation
The structural representation that Fig. 1 is the EPS system;
The schematic diagram that Fig. 2 is wireless side network element core network access;
Another schematic diagram that Fig. 3 is wireless side network element core network access;
The another schematic diagram that Fig. 4 is wireless side network element core network access;
The data flow path schematic diagram that Fig. 5 is local IP access and the access of traditional core net;
The schematic diagram that Fig. 6 is data transfer path under the User Status transfer case;
Another schematic diagram that Fig. 7 is data transfer path under the User Status transfer case;
The another schematic diagram that Fig. 8 is data transfer path under the User Status transfer case;
Fig. 9 upgrades schematic diagram for the data link that the user transfers connection status to from idle condition;
Figure 10 is the schematic flow sheet that LTE system attaching process core net links example one of the present invention while setting up;
Figure 11 is that LTE system PDN connects the schematic flow sheet that the process of establishing core net links example two of the present invention while setting up;
Figure 12 is that LTE system S1 dispose procedure local IP access forwards the schematic flow sheet that links example three of the present invention while setting up;
Figure 13 is the schematic flow sheet that LTE system data buffer unit is received the example of the present invention four that link upgrades after the core net downlink data;
Figure 14 is the schematic flow sheet that LTE system data buffer unit is received the example of the present invention five that link upgrades after the core net downlink data;
The schematic flow sheet of the example of the present invention six that Figure 15 is gprs system pdp context activation indication network link type;
Figure 16 is the schematic flow sheet that the gprs system data buffer storage unit is received the example of the present invention seven that link upgrades after the core net downlink data.
Embodiment
Basic thought of the present invention is: mobility management unit is when setting up network linking, by the type notification data buffer storage unit of network linking; Data buffer storage unit is carried out according to the type of network linking or indication mobility management unit releasing resource.
Enforcement below in conjunction with accompanying drawing to technical scheme is described in further detail.
A kind of method of distinguishing network link type for data cache unit, the method comprises: the core network mobility administrative unit is when setting up network linking, by the type notification data buffer storage unit of network linking; Data buffer storage unit is carried out according to the type of network linking or indication mobility management unit releasing resource.
Here, after data buffer storage unit is known the type of network linking, preserve the type of network linking in this locality.
Here, data buffer storage unit is carried out according to the type of network linking or is indicated the mobility management unit releasing resource specifically to comprise the following steps:
Step 531, when data buffer storage unit when network linking receives downlink data, according to the type of the network linking of preserving, the data type of judging downlink data is core network data or local IP access data or comprises core network data and the local IP access data.
Step 532, respectively according to the difference of judged result, that is: judgment result is that core network data or local IP access data or comprise core network data and the local IP access data, carry out respectively or indicate mobility management unit to carry out the operation of corresponding releasing resource.
Below the concrete processing procedure of step 532 is set forth respectively.
The first situation: data buffer storage unit is judged the situation that the data type of downlink data is core network data.
Now, carry out or indicate the operation of mobility management unit releasing resource specifically to comprise: by data buffer storage unit, the conversion link resource of local and core network mobility administrative unit being discharged; Perhaps, data buffer storage unit can characterize the information notification mobility management unit of downlink data type, by mobility management unit, the conversion link resource in local and data buffer storage unit be discharged.
Wherein, the information that characterizes the downlink data type comprises: in the downlink data type indication of access gateway address, IAD sign, new definition at least one.
The second situation: data buffer storage unit is judged the situation that the data type of downlink data is the local IP access data.
Now, the operation of indication mobility management unit releasing resource specifically comprises: data buffer storage unit is informed mobility management unit by normal downlink data notification message.The core network mobility administrative unit is opened the conversion link timer according to prior art, discharges the conversion link resource after the conversion link timer expiry.
The third situation: the data type that data buffer storage unit is judged downlink data is the situation that comprises core network data and local IP access data.
Now, the operation of releasing resource specifically comprises: data buffer storage unit is informed mobility management unit by normal downlink data notification message.The core network mobility administrative unit is opened the conversion link timer according to prior art, discharges the conversion link resource after the conversion link timer expiry.
It is to be noted: adopt the present invention, realize that second, third kind of situation is a kind of compatible processing the to prior art,, except releasing resource timely and effectively, also there is compatible effect in the present invention to prior art.
The network linking type more than related to comprises: in core net link, local IP access link at least one.
The data buffer storage unit more than related to comprises: gateway, Serving GPRS Support Node.Wherein, Serving GPRS Support Node is for supporting the situation of gn interface.
In sum, the present invention mainly comprises following content:
The core network mobility administrative unit, such as: MME, support the S4 interface SGSN, support the SGSN of gn interface, inform the type of this network linking of data buffer storage unit when setting up network linking, data buffer storage unit is preserved this information.Particularly, the network linking type comprises: core net link, local IP access link.
Further, can judge data type when data buffer storage unit when certain network linking is received downlink data is core network data or local IP access data.
If data buffer storage unit judgement data are core network datas, the mode of releasing resource has two kinds so, and the releaser who carries out releasing operation is different.
Specifically, a kind of mode is: by data buffer storage unit, by the deleting bearing request message, the conversion link resource of local and core network mobility administrative unit is discharged.Wherein, the deleting bearing request message needs cause value to be used to refer to mobility management unit only to discharge not releasing bearing of tunnel.
Another kind of mode is: data buffer storage unit is by downlink data notification message, can characterize the information notification mobility management unit of downlink data type, by mobility management unit initiation session deletion request message, the conversion link resource in local and data buffer storage unit is discharged.Wherein, the information of sign downlink data type can comprise following content: the downlink data type indication of access gateway address, IAD sign, new definition.
If data buffer storage unit judgement data are local IP access data, data buffer storage unit is informed mobility management unit by normal downlink data notification message so.The core network mobility administrative unit is opened the conversion link timer according to prior art, discharges the conversion link resource after timer expiry.
If the existing core network data of data buffer storage unit judgement data also has the local IP access data, data buffer storage unit is informed mobility management unit by normal downlink data notification message so.The core network mobility administrative unit is opened the conversion link timer according to prior art, discharges the conversion link resource after timer expiry.
Here it is to be noted: for mobility management unit, be to support the situation of the Serving GPRS Support Node of gn interface, the release of the judgement of so above-mentioned network linking type, preservation and local IP access conversion link resource is processed and is all completed in mobility management unit this locality, belongs to built-in function.
Wherein, the local IP access function comprises: by Home eNodeB local IP access home network, by Home eNodeB local IP access enterprise network, by Home eNodeB or macrocellular access the Internet.
Wherein, data buffer storage unit comprises: gateway, Serving GPRS Support Node.Wherein, Serving GPRS Support Node is for supporting the situation of gn interface.
Below to the present invention's elaboration of giving an example.
Example one: Figure 10 is that LTE system attaching process core net links embodiments of the present invention while setting up, and specifically comprises the following steps:
Step 601, user's start-up logging initiated to adhere to request to time in network, wherein carried APN or the wish that the user will ask network linking and indicated.
Step 602, whether the wireless side network element forwards Attach Request message, and support the ability of local IP access to bring mobility management unit the wireless side network element by the initialization non-access layer information of bottom.Wherein the wireless side network element comprises: Home eNodeB, macro base station, femto gateway.Mobility management unit can be Mobility Management Entity or the Serving GPRS Support Node of supporting the S4 interface.
Step 603, mobility management unit is carried out authentication and authentication according to the user security information in Attach Request message to this user, guarantees the authorized user access network.
Step 604, if there is no user's subscription data in mobility management unit, carry out issuing of user signing contract information by upgrading position request message requests home subscriber data server so.
Step 605, the home subscriber data server by upgrade the position acknowledge message by user's signing data distributing to mobility management unit.
Step 606, mobility management unit is judged as the type of network linking that the user sets up according to Access Point Name (APN, access pointname) or the wish indication of user's request in conjunction with user's subscription data, and selects applicable IAD.
Here, if user's request is that local IP access link or network determine as the user sets up the local IP access link, mobility management unit is closed completing user local IP access function for this user selects local access network so.If user's request is that core net link or network determine that mobility management unit is accessed the function of the Internet for this user selects core net IAD completing user by core net so for the user sets up the core net link.This example be take user request is that core net link or network determine to be linked as example and to be described as the user sets up core net, and the process of setting up accordingly the local IP access link is similar, and difference is done concise and to the point description in implementation step.
Step 607, be linked as core net link if institute builds, and mobility management unit is selected applicable gateway according to IAD and carried out the process of establishing of network linking by creating conversation request message so.Wherein carry the network linking type information that step 606 judges.
Here, if building, institute is linked as the local IP access link, mobility management unit adopts existing direct tunnel style to close directly to send to local access network and creates conversation request message so, no longer carry out the gateway selection and set up the local IP access link by gateway, now mobility management unit is preserved the network linking type, reinform its network linking type when user's subsequent transfer to idle condition is set up the local IP access forwarding channel, refer to the described execution mode of Figure 12 example three.
Step 608, gateway is set up the corresponding context of network linking by creating conversation request message at IAD, and access gateway address and Tunnel Identifier are reported to IAD uses as downlink data transmission.
Step 609, IAD is replied and is created conversational response message to gateway.By IAD, be that the uplink tunnel mark band that distributes of transmitting uplink data is to IAD.
Step 610, gateway is replied and is created conversational response message to mobility management unit.By gateway, be that the uplink tunnel mark band that distributes of transmitting uplink data is to mobility management unit.
Step 611, carry out the subsequent attachment process and comprise that foundation, the up-downgoing tunnel of radio bearer the process such as get through, same as the prior art, do not do and repeat.
Example two: Figure 11 is that LTE system PDN connection process of establishing core net links embodiments of the present invention while setting up, and specifically comprises the following steps:
Step 701, initiate the PDN connection request when user need to access new internet content, wherein carry APN or wish indication that the user will ask network linking.
Step 702, whether the wireless side network element forwards PDN connection request message, and support the ability of local IP access to bring mobility management unit the wireless side network element by the direct-sending message of bottom.Wherein the wireless side network element comprises: Home eNodeB, macro base station, femto gateway.Mobility management unit can be Mobility Management Entity MME or the Serving GPRS Support Node SGSN that supports the S4 interface.
Step 703, the user contracting data that mobility management unit is downloaded in conjunction with attaching process according to APN or the wish indication of user's request is judged as the type of network linking that the user sets up, and selects applicable IAD.
Here, if user's request is that local IP access link or network determine as the user sets up the local IP access link, mobility management unit is closed completing user local IP access function for this user selects local access network so.If user's request is that core net link or network determine that mobility management unit is accessed the function of the Internet for this user selects core net IAD completing user by core net so for the user sets up the core net link.This example be take user request is that core net link or network determine to be linked as example and to be described as the user sets up core net, and the process of setting up accordingly the local IP access link is similar, and difference is done concise and to the point description in implementation step.
Step 704, be linked as core net link if institute builds, and mobility management unit is selected applicable gateway according to IAD and carried out the process of establishing of network linking by creating conversation request message so.Wherein carry the network linking type information that step 703 judges.
Here, if building, institute is linked as the local IP access link, mobility management unit adopts existing direct tunnel style to close directly to send to local access network and creates conversation request message so, no longer carry out the gateway selection and set up the local IP access link by gateway, now mobility management unit is preserved the network linking type, reinform its network linking type when user's subsequent transfer to idle condition is set up the local IP access forwarding channel, refer to the described execution mode of Figure 12 example three.
Step 705, gateway is set up the corresponding context of network linking by creating conversation request message at IAD, and access gateway address and Tunnel Identifier are reported to IAD uses as downlink data transmission.
Step 706, IAD is replied and is created conversational response message to gateway.By IAD, be that the uplink tunnel mark band that distributes of transmitting uplink data is to IAD.
Step 707, gateway is replied and is created conversational response message to mobility management unit.By gateway, be that the uplink tunnel mark band that distributes of transmitting uplink data is to mobility management unit.
Step 708, carry out follow-up PDN and connect process of establishing and comprise that foundation, the up-downgoing tunnel of radio bearer the process such as get through, same as the prior art, do not do and repeat.
Example three: Figure 12 is that the forwarding of LTE system S1 dispose procedure local IP access links embodiments of the present invention while setting up, and specifically comprises the following steps:
Step 801, if the wireless side network element is because O& When the integrity checking of M interoperability, user's deexcitation, repetition unsuccessfully waits reason to determine that the signaling of releasing user connects, can send S1 user's context releasing request message to mobility management unit.After mobility management unit completes signaling and data transmission procedure, also can initiate user's signaling Connection Release in order to save Internet resources, transfer the user to idle condition from connection status, now do not need step 801.
Step 802, whether mobility management unit judges that the user is current the local IP access link activated, if not carry out normal S1-U interface carrying dispose procedure, this does not do and repeats for prior art.If have create the forwarding channel that local IP access links.
Step 803, if the active user has the local IP access link activated, mobility management unit is informed gateway by creating the session request by the network linking type so.
Step 804, gateway informs that by the tunnel identification information of the address of gateway and down buffer storage passage local access network closes by revising bearing request message.Due to the contextual information that now the local access network pass has existed local IP access to link, therefore only need gateway to carry out the tunnel renewal and get final product.Local access network closes after tunnel upgrades the buffer memory that can carry out the local IP access downlink data.
Step 805, local access network closes to gateway replys and revises bearing response message.
Step 806, gateway is replied and is created conversational response message to mobility management unit.
Step 807, continued follow-up S1 link dispose procedure, and interface-free resources is discharged, and the user proceeds to idle condition from connection status.
Example four: Figure 13 is that LTE system data buffer unit is received the execution mode one that link upgrades after the core net downlink data, comprises the following steps:
Step 901, the core net IAD sends to the gateway as buffer unit using user's downlink data of receiving.
Step 902, the network linking that gateway adopts according to downlink data transmission, in conjunction with the source of the network linking type judgement downlink data of having preserved.
Step 903, the information band that gateway will characterize the downlink data type in downlink data notification message is to mobility management unit, and the information that wherein characterizes the downlink data type can comprise following content: the downlink data type indication of access gateway address, IAD sign, new definition.
Step 904, mobility management unit is initiated paging in the zone of user's registration.
Step 905, after the user receives beep-page message, initiating business request is responded.
Step 906, mobility management unit is set up request message indication wireless side by initial context and is set up empty port load-supporting, carries uplink tunnel sign, address information and the carrying Qos information in the direct tunnel of local IP access in message.
Step 907, the wireless side network element is set up empty port load-supporting according to carrying Qos information.Wherein the wireless side network element comprises: Home eNodeB, macro base station, femto gateway.
Step 908, the wireless side network element has been set up message by initial context and has been brought mobility management unit by the downlink tunnel of distribution sign and address information.
Step 909, the user enters connection status, and mobility management unit brings the local access network pass by revising bearing request message by the downlink tunnel sign of wireless side network element distribution, address information etc., gets through the data downstream transmission channel of local IP access link.
Step 910, local access network closes as mobility management unit replys and revises bearing response message.
Step 911, the wireless side network element is learnt the uplink tunnel sign in the direct tunnel of local IP access by step 906, local access network close the downlink tunnel that obtains the direct tunnel of local IP access by step 909 identify local IP access up-downgoing data can normal transmission.
Step 912, because downlink data derives from core net, mobility management unit is initiated the deletion that local IP access down forwards network linking, and mobility management unit links corresponding context deletion by deleting the session request by transmission network.
Step 913, this network linking of service gateway discovering, for local IP access, is deleted corresponding context and replys and delete conversational response message.
In the present invention, when mobility management unit, when step 903 is known the downlink data source, can initiate step 912 and step 913, to carry out the deletion of local IP access transmission network link, therefore with the sequencing of subsequent step, not do restriction.
Example five: Figure 14 is that LTE system data buffer unit is received the execution mode two that link upgrades after the core net downlink data, comprises the following steps:
Step 1001, the core net IAD sends to the gateway as buffer unit using user's downlink data of receiving.
Step 1002, the network linking that gateway adopts according to downlink data transmission, in conjunction with the source of the network linking type judgement downlink data of having preserved.
Step 1003, gateway sends downlink data notification message trigger paging to mobility management unit.
Step 1004, mobility management unit is initiated paging in the zone of user's registration.
Step 1005, after the user receives beep-page message, initiating business request is responded.
Step 1006, mobility management unit is set up request message indication wireless side by initial context and is set up empty port load-supporting, carries uplink tunnel sign, address information and the carrying Qos information in the direct tunnel of local IP access in message.
Step 1007, the wireless side network element is set up empty port load-supporting according to carrying Qos information.Wherein the wireless side network element comprises: Home eNodeB, macro base station, femto gateway.
Step 1008, the wireless side network element has been set up message by initial context and has been brought mobility management unit by the downlink tunnel of distribution sign and address information.
Step 1009, the user enters connection status, and mobility management unit brings the local access network pass by revising bearing request message by the downlink tunnel sign of wireless side network element distribution, address information etc., gets through the data downstream transmission channel of local IP access link.
Step 1010, local access network closes as mobility management unit replys and revises bearing response message.
Step 1011, the wireless side network element is learnt the uplink tunnel sign in the direct tunnel of local IP access by step 1006, local access network close the downlink tunnel that obtains the direct tunnel of local IP access by step 1009 identify local IP access up-downgoing data can normal transmission.
Step 1012, because downlink data derives from core net, gateway is initiated the deletion that local IP access down forwards network linking, and gateway links corresponding user's face tunnel by the deleting bearing request of carrying the cause specific value by transmission network and deleted.Wherein special cause value is used to indicate mobility management unit and only deletes tunnel information, retains the chain of command information of carrying in order to use during the direct building tunnel of local IP access.
Step 1013, mobility management unit is deleted the corresponding beared information of this network linking and is replied the deleting bearing response message.
In the present invention, when gateway, when step 1002 is known the downlink data source, can initiate step 1012 and step 1013, to carry out the deletion of local IP access transmission network link, therefore with the sequencing of subsequent step, not do restriction.The described method mobility management unit of this example can not be learnt the downlink data source, if therefore before receiving step 1012 step, completed the foundation of radio bearer, it still can initiate the renewal of transmission network link so, and now gateway is received that updating message is ignored and do not done response.
The execution mode that example six: Figure 15 is gprs system packet data protocol (PDP) context activation process core net indication network link type specifically comprises the following steps:
Step 1101, initiate when the user need to access new internet content to activate the PDP Context request message, wherein carries APN or wish indication that the user will ask network linking.
Step 1102, whether the wireless side network element forwards and activates the PDP Context request message, and support the ability of local IP access to bring Serving GPRS Support Node the wireless side network element by the direct-sending message of bottom.
Step 1103, the user contracting data that Serving GPRS Support Node is downloaded in conjunction with attaching process according to APN or the wish indication of user's request is judged as the type of network linking that the user sets up, and selects applicable IAD.
Here, due to the buffer of Serving GPRS Support Node as 3G system descending data, therefore the type of institute's establishing network link is preserved in the rear this locality of judgement.If user's request is that local IP access link or network determine as the user sets up the local IP access link, mobility management unit is closed completing user local IP access function for this user selects local access network so.If user's request is that core net link or network determine that mobility management unit is accessed the function of the Internet for this user selects core net IAD completing user by core net so for the user sets up the core net link.This example be take user request is that core net link or network determine to be linked as example and to be described as the user sets up core net, and the process of setting up accordingly the local IP access link is similar, and difference is done concise and to the point description in implementation step.
Step 1104, be linked as the core net link if institute builds, and Serving GPRS Support Node carries out the process of establishing of network linking by creating the PDP Context request message so.Be linked as the local IP access link if in like manner build, Serving GPRS Support Node closes directly to send to local access network and creates the PDP Context request message so.
Step 1105, IAD, comprise that the IAD of core net IAD and local IP access is replied the response of establishment PDP Context and brought Serving GPRS Support Node by the uplink tunnel of distribution sign and address information.
Step 1106, Serving GPRS Support Node indication wireless side network element is set up empty port load-supporting, and wherein the wireless side network element can be: Home eNodeB, macro base station, femto gateway.
If the network linking of setting up is the local IP access link, the Serving GPRS Support Node judgement adopts direct tunnel style just local access network to be closed to uplink tunnel sign and the address information of distributing and brings the wireless side network element so.If the network linking of setting up is the core net link, Serving GPRS Support Node brings the wireless side network element by the uplink tunnel of its distribution sign and address information so.
Radio bearer has been set up rear wireless side network element and has been brought Serving GPRS Support Node by the downlink tunnel of its distribution sign and address information.
Step 1107, setting up core net when link, if need to carry out the Qos negotiation, so just carry out this step, and by the Qos information band of wireless side request, to IAD, otherwise this step can be ignored.If what set up is the local IP access link, this step is set up the direct tunnel of local IP access so, and the downlink tunnel sign that the wireless side network element is distributed and address information bring local access network and close, and get through down going channel.
Step 1108, IAD is replied and is upgraded the PDP Context response message.
Step 1109, Serving GPRS Support Node is replied the activation PDP Context and is accepted message.
Because Serving GPRS Support Node itself is also data buffer storage unit, so just preserve the network linking type after having set up network linking always, even if the user enters idle condition, (Iu Connection Release process) do not discharge yet, and between Serving GPRS Support Node only completes and closes to local access network, the renewal in tunnel gets final product.
Example seven: Figure 16 is that the gprs system data buffer storage unit is received the execution mode that link upgrades after the core net downlink data, specifically comprises the following steps:
Step 1201, the core net IAD sends to the Serving GPRS Support Node as buffer unit using user's downlink data of receiving.
Step 1202, the network linking that Serving GPRS Support Node adopts according to downlink data transmission, in conjunction with the source of the network linking type judgement downlink data of having preserved.If learn that downlink data is that core network data so just discharges the user plane information that local IP access forwards link, this is the built-in function of Serving GPRS Support Node, and concrete mode does not explain.
Step 1203, Serving GPRS Support Node is initiated paging in the zone of user's registration.
Step 1204, after the user receives beep-page message, initiating business request is responded.
Step 1205, Serving GPRS Support Node is set up empty port load-supporting by radio bearer assignment request message indication wireless side, carries uplink tunnel sign, address information and the carrying Qos information in the direct tunnel of local IP access in message.
Step 1206, the wireless side network element is set up empty port load-supporting according to carrying Qos information.Wherein the wireless side network element comprises: Home eNodeB, macro base station, femto gateway.
Step 1207, the wireless side network element assigns response message to bring Serving GPRS Support Node by the downlink tunnel of distribution sign and address information by radio bearer.
Step 1208, the user enters connection status, Serving GPRS Support Node brings the local access network pass by upgrading the PDP Context request message by the downlink tunnel sign of wireless side network element distribution, address information etc., gets through the data downstream transmission channel of local IP access link.
Step 1209, local access network closes as Serving GPRS Support Node replys and revises bearing response message.
Step 1210, the wireless side network element is learnt the uplink tunnel sign in the direct tunnel of local IP access by step 1205, local access network close the downlink tunnel that obtains the direct tunnel of local IP access by step 1208 identify local IP access up-downgoing data can be by direct tunnel normal transmission.
More than of the present invention, in all scenes of each example, if data buffer storage unit judgement data are local IP access data, data buffer storage unit is informed mobility management unit by normal downlink data notification message so.The core network mobility administrative unit is opened the conversion link timer according to prior art, discharges the conversion link resource after timer expiry.
If the existing core network data of data buffer storage unit judgement data also has the local IP access data, data buffer storage unit is informed mobility management unit by normal downlink data notification message so.The core network mobility administrative unit is opened the conversion link timer according to prior art, discharges the conversion link resource after timer expiry.
A kind of system of distinguishing network link type for data cache unit, this system comprises: the release module of the notification module of mobility management unit side and data buffer storage unit side.Wherein, notification module, for mobility management unit when setting up network linking, by the release module of the type notification data buffer storage unit side of network linking.Release module, carry out or indication mobility management unit releasing resource for the type according to network linking.
Here, this system also comprises: the preservation module of data buffer storage unit side, know the type of network linking for data buffer storage unit after, preserve the type of network linking in this locality.
Here, release module further comprises: acquisition module, judge module and release Executive Module.Wherein, acquisition module is for when when network linking receives downlink data, obtains the type of the network linking that the preservation module preserves.Judge module, the data type of judging downlink data for the type according to network linking is core network data or local IP access data or comprises core network data and the local IP access data.Discharge Executive Module, for the difference according to judged result, carry out respectively or indicate mobility management unit to carry out the operation of corresponding releasing resource.
Here, as follows to the item Unified Explanation of relevant Chinese and English annotation related in above each figure and word:
Home subscriber server means with Home Subscriber Server, is abbreviated as HSS; Mobility Management Entity means with Mobility Management Entity, is abbreviated as MME; Serving GPRS Support Node means with Serving GPRS Support Node, is abbreviated as SGSN; The policy charging rule function means with Policyand Charging Rule Function, is abbreviated as PCRF; Gateway means with Serving Gateway, is abbreviated as S-GW, is the Serving GW in Fig. 1; Packet data gateway means with PDN Gateway, is abbreviated as P-GW, is the PDN GW in Fig. 1; Packet data network means with Packet DataNetwork, is abbreviated as PDN; RNC in Fig. 1 is radio network controller; E-NodeB in Fig. 1 is evolution base station, also can mean with eNB; CN in Fig. 5 is core net; Gateway GPRS Support Node means with Gateway GPRS Support Node, is abbreviated as GGSN; Home eNodeB means with Home NodeB, is abbreviated as HNB; The Home eNodeB of evolution means with Home eNodeB, is abbreviated as HeNB; The local IP access function means with Local IP Access or Selected IP Traffic Offload, is abbreviated as LIPA or SIPTO.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims (7)

1. the method for a distinguishing network link type for data cache unit, is characterized in that, the method comprises: mobility management unit is when setting up network linking, by the type notification data buffer storage unit of described network linking; Described data buffer storage unit is carried out according to the type of described network linking or indication mobility management unit releasing resource; Wherein,
Described data buffer storage unit is carried out according to the type of described network linking or indication mobility management unit releasing resource, specifically comprise: when described data buffer storage unit when network linking receives downlink data, type according to described network linking, the data type of judging described downlink data is core network data or local data or comprises core network data and local data, and, according to the difference of judged result, carry out respectively or the indication mobility management unit is carried out the operation of corresponding releasing resource; Wherein,
When the data type of judging described downlink data when described data buffer storage unit is core network data, carry out or indicate the operation of mobility management unit releasing resource, specifically comprise: by data buffer storage unit, the conversion link resource of local and core network mobility administrative unit is discharged; Perhaps, data buffer storage unit can characterize the information notification mobility management unit of downlink data type, by mobility management unit, the conversion link resource in local and data buffer storage unit be discharged.
2. method according to claim 1, is characterized in that, after described data buffer storage unit is known the type of described network linking, preserves the type of described network linking in this locality.
3. method according to claim 1 and 2, is characterized in that, the information of described sign downlink data type comprises: in the downlink data type indication of access gateway address, IAD sign, new definition at least one.
4. method according to claim 1 and 2, is characterized in that, when the data type of judging described downlink data when described data buffer storage unit is local data, the operation that the indication mobility management unit is carried out releasing resource specifically comprises:
Data buffer storage unit is informed mobility management unit by normal downlink data notification message;
Open the conversion link timer by mobility management unit, discharge the conversion link resource after the conversion link timer expiry; Perhaps,
The data type of judging described downlink data when described data buffer storage unit is when comprising core network data and local data, and the operation of the releasing resource that the indication mobility management unit is carried out specifically comprises:
Data buffer storage unit is informed mobility management unit by normal downlink data notification message;
Open the conversion link timer by mobility management unit, discharge the conversion link resource after the conversion link timer expiry.
5. according to the described method of any one in claim 1 or 2, it is characterized in that, described network linking type comprises: in core net link, local links at least one.
6. the system of a distinguishing network link type for data cache unit, is characterized in that, this system comprises: the release module of the notification module of mobility management unit side and data buffer storage unit side; Wherein,
Notification module, for mobility management unit when setting up network linking, by the release module of the type notification data buffer storage unit side of described network linking;
Release module, carry out or indication mobility management unit releasing resource for the type according to described network linking; Wherein, described release module further comprises:
Acquisition module, for when when network linking receives downlink data, obtain the type of described network linking; Judge module, the data type of judging described downlink data for the type according to described network linking is core network data or local data or comprises core network data and local data; Discharge Executive Module, for the difference according to judged result, carry out respectively or indicate mobility management unit to carry out the operation of corresponding releasing resource; Wherein,
When the data type of judging described downlink data when described judge module is core network data, the operation of mobility management unit releasing resource is carried out or indicated to described release Executive Module, specifically comprises: by described release Executive Module, the conversion link resource of local and core network mobility administrative unit is discharged; Perhaps, described release Executive Module can characterize the information notification mobility management unit of downlink data type, by mobility management unit, the conversion link resource in local and data buffer storage unit be discharged.
7. system according to claim 6, is characterized in that, this system also comprises: the preservation module of data buffer storage unit side, know the type of described network linking for data buffer storage unit after, preserve the type of described network linking in this locality.
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