CN101291529B - Method and apparatus for identifying bearing type - Google Patents
Method and apparatus for identifying bearing type Download PDFInfo
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- CN101291529B CN101291529B CN2007101815349A CN200710181534A CN101291529B CN 101291529 B CN101291529 B CN 101291529B CN 2007101815349 A CN2007101815349 A CN 2007101815349A CN 200710181534 A CN200710181534 A CN 200710181534A CN 101291529 B CN101291529 B CN 101291529B
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Abstract
In the embodiment, the invention discloses a method for identifying a carrying type. The carrying type of a user terminal is identified through using carrying type identification in a source network, and the carrying type identification is saved; in the process that the user terminal is switched from the source network to a target network, the carrying type identification is transmitted to the target network. The embodiment of the invention also discloses a mobile management entity and an anchor-point gateway. The technical proposal ensures that the target network can identify the carrying type, thereby determining whether default carrying exists or not; if yes, the default carrying is needed to be newly established, thereby greatly reducing the load of the target network and saving network resource; if not, the default carrying is established, and the normal switching of the user terminal is guaranteed.
Description
Technical field
The present invention relates to wireless communication technology field, particularly method and the mobile management entity and the anchor gateway of identification bearer types.
Background technology
System Architecture Evolution SAE (SAE, System Architecture Evolution) network is the next generation network framework that third generation partner program (3GPP) International Standards Organization carries out, and promptly prepares the brand-new mobile grouping field network architecture of releasing.The main thought of SAE network is to simplify existing mobile packet network framework, and the intermediate link that reduces Business Processing of repartitioning by network element integration and function realizes the flattening of the network architecture.
Fig. 1 is a mobile grouping field network architecture diagram of the prior art.As shown in Figure 1, the existing mobile grouping field network architecture comprises: travelling carriage (MS), wireless access network (Radio Access Network), core net (Core Network) and Packet Data Network/IP Multimedia System (PDN/IMS).
MS is user terminal (UE) in Fig. 1, can be mobile phone, wireless data card etc.
In the 2G/3G network, the wireless access mesh portions among Fig. 1 comprises the base station (BS) and the base station controller (BSC) of some, is used to connect subscriber terminal equipment, as mobile phone, wireless data card etc.Core net partly generally comprises Serving GPRS Support Node (SGSN) and Gateway GPRS Support Node (GGSN).
In the SAE network, wireless access network is reduced to the base station (eNB in the evolution, eNode B), generally comprise mobile management entity (MME) and user entity (SAE GW) in the core net, mobile management entity is used to connect wireless access network, carry out user's mobile management, and mutual, set up the transmission channel of user data with base station and user entity; User entity is used to connect wireless access network and Packet Data Network, to be transmitted at least one Packet Data Network from the user uplink data of wireless access network, as Internet Internet, intranet Intranet or other networks, and will be transmitted to wireless access network from the down user data of Packet Data Network.
As can be seen from the above description, the core net part of the SAE network architecture will be repartitioned after SGSN in the 2G/3G network and the merger of GGSN function, resolves into two network entities of MME and SAE GW.MME is responsible for mobile management and user's functions such as authentication, and SAE GW mainly is responsible for and the relevant function of user's data transmission.The logical separation of chain of command and user's face can develop chain of command to the jumbo trend of user separately, and user's face then can more be paid close attention to the service quality (QoS) in high bandwidth, big throughput and the transfer of data, the guarantee of fail safe.
In the mobile grouping field network architecture, realize the exchange of user terminal and grouping data service data, must set up the passage of carrying as business data transmission.In the existing 2G/3G network, carrying all has a unique sign, this is designated IMSI International Mobile Subscriber Identity (IMSI, International Mobile SubscriberIdentity, )+network layer Operational Visit dot mark symbol (NSAPI, Network layer Service Access PointIdentifier).
In the SAE network, carrying can be divided into two classes: default bearer and dedicated bearing.Wherein, default bearer is carrying that does not have data flow template (TFT, Traffic Flow Template) of setting up in the attaching process of terminal or the carrying with specific T FT; And dedicated bearing is after adhering to successfully, and the carrying according to user's needs are set up have TFT, but this TFT is not specially appointed.
According to the trend of network development, terminal need be switched between different networks.As between two SAE networks, switching; After perhaps switching to the 2G/3G network, switch to the SAE network again by the SAE network; Perhaps directly switch to the SAE network by the 2G/3G network.Illustrate respectively in the existing SAE network at several situations below, and user terminal generation across a network existing defective when switching:
First kind of situation, user terminal switch to the situation of target SAE network from source SAE network:
When user terminal switches to target SAE network from source SAE network since in existing SAE network mark and discern default bearer and dedicated bearing not, therefore, the MME in the target SAE network can't judge and whether set up default bearer.At this moment, if the MME in the target SAE network will greatly increase the burden of target MME and expend Internet resources for switching newly-built default bearer each time, if newly-built default bearers not then can cause user terminal normally to switch.
After second kind of situation, user terminal switch to the 2G/3G network from source SAE network, switch to the situation of target SAE network again:
If in the SAE network of source, set up default bearer or dedicated bearing, after user terminal switches to the 2G/3G network,, promptly default bearer and dedicated bearing are not handled because the 2G/3G network is not distinguished default bearer and dedicated bearing; When user terminal switches to target SAE network again since in existing SAE network mark and discern default bearer and dedicated bearing not, the MME in the target SAE network can't judge whether to have set up default bearer so.If the MME in the target SAE network will greatly increase the burden of target MME and expend Internet resources for switching newly-built default bearer each time, if newly-built default bearers not then can cause user terminal normally to switch.
The third situation, user terminal switch to the situation of SAE network from the 2G/3G network:
When user terminal when the 2G/3G network switches to the SAE network, MME in the SAE network can't judge whether default bearer exists, if MME is for switching newly-built default bearer each time, will greatly increase the burden of target MME and expend Internet resources, if not newly-built default bearer can cause user terminal normally to switch.
The 4th kind of situation, user terminal switches to the situation of SAE network from the Non-3GPP network
When tightly coupled mode of Non-3GPP network using and SAE intercommunication, the bearing concept identical with 3GPP can appear in Non-3GPP, so also exist when user terminal when the Non-3GPP network switches to the SAE network, the MME in the SAE network can't judge whether default bearer exists.
Summary of the invention
The embodiment of the invention provides the method and apparatus of identification bearer types, and these method and apparatus make user terminal when source network switches to objective network, and the network element in the objective network can discern bearer types.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The embodiment of the invention discloses a kind of method of discerning bearer types, this method comprises:
In source network, use the bearer types of bearer types mark for marking user terminal, and in source network, preserve described bearer types sign;
Switch to from source network the process of objective network at described user terminal, described bearer types sign is delivered to objective network;
Objective network identifies the bearer types of judging described user terminal according to described bearer types.
The embodiment of the invention discloses a kind of mobile management entity, this mobile management entity comprises: handoff request sending module and/or handoff request receiver module, wherein,
The handoff request sending module is used to send forward direction handoff request message, the bearer types sign of carrying in the bearer context in this forward direction handoff request message to be preserved;
The handoff request receiver module is used to receive the forward direction handoff request message of carrying the bearer types sign, and judges bearer types according to the sign of the bearer types in the handoff request message.
The embodiment of the invention also discloses a kind of anchor gateway, this anchor gateway comprises: preserve module and judge module, wherein,
Preserve module, be used to preserve the bearer context of the user terminal that comprises the bearer types sign;
Judge module is used for the bearer types according to the described user terminal of bearer types sign judgement of preserving module.
The embodiment of the invention discloses a kind of method of discerning bearer types, this method comprises:
Setting up of initiating when creating carrying in the SAE network of source increases the bearer types sign in the bearing request message, and preserves described bearer types sign in the bearer context of set up carrying;
When user terminal when source SAE network switches to target SAE network, when perhaps switching to the SAE network again after source SAE network switches to other networks, this method is further comprising the steps of:
During switching, in forward direction handoff request message, carry described bearer types sign;
Mobile management entity in the target SAE network judges whether to exist default bearer according to the bearing identification in the described forward direction handoff request message, is then not newly-built default bearer; Otherwise newly-built default bearer.
The embodiment of the invention discloses a kind of method of discerning bearer types, when user terminal when source SAE network switches to target SAE network, when perhaps switching to the SAE network again after source SAE network switches to other networks, this method comprises:
The grouped data network gateway of target SAE network side judges whether to exist default bearer according to whether having the data flow template and/or whether have specific data flow template in the carrying; If have default bearer, then not newly-built default bearer, otherwise newly-built default bearer.
The embodiment of the invention discloses a kind of method of discerning bearer types, it is characterized in that, this method comprises:
In the 2G/3G network, in PDP Context, increase the bearer types sign for carrying;
When the 2G/3G network switches to the SAE network, in forward direction handoff request message, carry described bearer types sign at user terminal;
Mobile management entity in the SAE network judges whether to exist default bearer according to the sign of the bearer types in the described forward direction handoff request message; If have default bearer, then not newly-built default bearer; Otherwise newly-built default bearer.
As seen from the above technical solution, in the embodiment of the invention, by in the source, using the bearer types of bearer types mark for marking user terminal, and the described bearer types of preservation identifies in source network, switch to the process of objective network from source network at user terminal, the bearer types sign is delivered to objective network, objective network makes according to the technical scheme that described bearer types identifies the bearer types of judging described user terminal, objective network can be discerned bearer types, thereby know whether default bearer exists, if there is default bearer, then need not newly-built default bearer, greatly alleviated the burden of objective network, Internet resources have been saved; If there is no default bearer, then newly-built default bearer ensures that user terminal normally switches.
Description of drawings
Fig. 1 is a mobile grouping field network architecture diagram of the prior art;
Fig. 2 is the embodiment of the invention identifies bearer types in attaching process a process flow;
Fig. 3 is the process flow diagram that embodiment of the invention UE switches between two SAE networks;
Fig. 4 is embodiment of the invention UE switches to the 2G/3G network from the SAE network a process flow diagram;
Fig. 5 be embodiment of the invention UE on switching infrastructure shown in Figure 4, switch back the process flow diagram of SAE network by the 2G/3G network;
Fig. 6 is the structured flowchart of a kind of mobile management entity of the embodiment of the invention;
Fig. 7 is the structured flowchart of a kind of anchor gateway of the embodiment of the invention.
Embodiment
One, in the SAE network, identifies bearer types
In embodiments of the present invention, by in the SAE network, increase the bearer types sign in the bearing request message (create bearer request) to setting up of gateway (GATEWAY) initiation, make GATEWAY can judge it is dedicated bearing or default bearer according to this bearer types sign, if dedicated bearing, then distribution T FT; If default bearer does not then distribute TFT or distributes specific TFT.Here GATEWAY is the anchor point in the network, is anchor gateway, can be the part of aforementioned SAE GW, i.e. grouped data network gateway (PDN GATEWAY).Among the embodiment below the present invention anchor gateway abbreviated as gateway or GATEWAY.
Adopt such scheme, make GATEWAY, be this dedicated bearing distribution T FT, and then make dedicated bearing normally set up that user terminal can carry out normal data communication by dedicated bearing judging when being dedicated bearing; Bearer types in the such scheme is designated follow-up handoff procedure the foundation that need to judge whether newly-built default bearer is provided simultaneously.
Attachment flow below in conjunction with accompanying drawing 2 is illustrated the above-mentioned technical scheme that identifies bearer types in the SAE network.
Fig. 2 is the embodiment of the invention identifies bearer types in attaching process a process flow.As shown in Figure 2, this attachment flow comprises the steps:
Step 201, user terminal UE initiates Attach Request message to MME.
Step 202, home subscriber server (HSS) carries out the authentication ciphering process with UE.
Step 203, MME sends the user position update request message to HSS.
Step 204, HSS receives that MME behind the user position update request message of its transmission, sends to MME to user's subscription data.
Step 205, MME returns response message to HSS after receiving user's subscription data.
Step 206 after HSS receives response message, sends the position to MME and upgrades response message.
Step 207, MME sends to GATEWAY and sets up bearing request message, comprises the sign of mark default bearer in this message.
In this step,, be exactly default bearer so set up the carrying of bearing request message establishment because this flow process is an attachment flow.
Step 208, GATEWAY returns to MME and sets up the default bearer response message.Carry the information such as TEID.IP of signaling plane and user's face in the message.
In this step, GATEWAY discerns default bearer according to the bearer types sign of setting up in the bearing request message that obtains in the step 207, is not this default bearer distribution T FT.
Step 209, MME initiates the establishment bearing request message of wireless access side to eNB.
Step 210, the side joint of eating dishes without rice or wine between eNB and the UE is gone into interaction message.
Step 211, eNB sends the bearing response message of wireless access side to MME.
Step 212, MME sends bearing response message to GATEWAY, such as service quality (QOS) if consult and change taken place, so by this message informing GATEWAY.
Step 213, MME sends to adhere to UE and accepts message.
Step 214, UE returns to adhere to MME and finishes message.
By above-mentioned flow process, can in attaching process, identify default bearer.
In addition, initiate as required at user terminal UE under the situation of dedicated bearing foundation, identify the mark dedicated bearing by in setting up bearing request message, increasing bearer types, after carrying the setting up bearing request message and arrive GATEWAY of this bearer types sign, GATEWAY identifies by this bearer types and discerns dedicated bearing, and is this dedicated bearing distribution T FT.
The method that increases the bearer types sign in setting up bearing request message can adopt following several mode:
(a) be that default bearer or dedicated bearing increase the bearer types sign
In setting up bearing request message, only for default bearer adds the bearer types sign, dedicated bearing does not add the bearer types sign, does not have the bearer types sign in the request message if i.e. foundation carrying is set up, and then being defaulted as is dedicated bearing; Otherwise, also can be only for dedicated bearing adds the bearer types sign, default bearer does not add the bearer types sign.
(b) for default bearer increases the default bearer type identification, for dedicated bearing increases the dedicated bearing type identification
In setting up bearing request message, add the default bearer type identification; Need initiate at user terminal under the situation of dedicated bearing foundation, in setting up bearing request message, add the dedicated bearing type identification.
(c) compose respectively with different bearer types ident values with dedicated bearing for default bearer
Be that in setting up bearing request message default bearer adds the bearer types sign, and be 0 for this bearer types identifies assignment; Under user terminal need be initiated situation that dedicated bearing sets up, in setting up bearing request message,, but be 1 for this bearer types identifies assignment for dedicated bearing also adds similar bearer types sign.
(d) adopt the proprietary value of cell to represent default bearer or dedicated bearing
For example, adopt cell NSAPI (network layer Operational Visit dot mark symbol) to represent default bearer.
In setting up bearing request message, increase the bearer types label manner and be not limited to above-mentioned four kinds of modes, also can adopt the different bearing request message types of setting up to identify default bearer or dedicated bearing.
MME sends carried the bearer types sign set up the default bearer request message to GATEWAY, correspondingly, GATEWAY also has to be increased bearer types with MME and identifies the judgment mode of representing that bearer types is corresponding, GATEWAY judges default bearer and dedicated bearing according to the bearer types sign, be dedicated bearing distribution T FT, for default bearer does not distribute TFT, or distribute specific TFT.
In handoff procedure, the bearer types sign is along with handoff procedure is transferred to objective network, MME in the objective network also have with source SAE network in MME increase bearer types and identify the judgment mode of representing that bearer types is corresponding, thereby identify according to this bearer types and to judge whether the newly-built default bearer of needs, if there is default bearer, need not newly-built default bearer, will greatly alleviate the objective network burden, save Internet resources; If there is no default bearer, then newly-built default bearer ensures that user terminal normally switches.
Two, user terminal switches to target SAE network from source SAE network, perhaps switches to target SAE network again after source SAE network switches to other non-SAE network
Non-SAE network described here refers to, 3GPP network except that the SAE network and Non-3GPP network.Be that example describes with the 2G/3G network among the 3GPP below.
In the SAE network of source, be default bearer or dedicated bearing increase bearer types sign; This bearer types is identified in the bearer context that stores on the MME of source; During switching, carry this bearer types sign in the forward direction handoff request message that source MME sends, the MME in the target side SAE network judges whether to exist default bearer according to the sign of the bearer types in the described forward direction handoff request message; If have default bearer, then not newly-built default bearer; Otherwise newly-built default bearer.
The MME of target side judges whether to need newly-built default bearer by bearer types sign, if there is default bearer, then not newly-built default bearer has so just alleviated the burden of target side MME, has saved the spent Internet resources of newly-built default bearer; If there is not default bearer, then newly-built default bearer, thus guaranteed the normal switching of user terminal.
Describe below in conjunction with the handoff procedure of 3 pairs of user terminals of accompanying drawing between two SAE networks.
Fig. 3 is the process flow diagram that embodiment of the invention UE switches between two SAE networks.As shown in Figure 3, this handoff procedure comprises the steps:
Step 301, the eNB of source makes a strategic decision, judges whether to initiate to switch (HANDOVER) flow process, be then to carry out switching initialization and execution in step 302.
Step 302, source eNB initiates handoff request message (HANDOVERREQUEST) to source MME.
Step 303 after source MME receives handoff request message, sends forward direction handoff request message (FORWARD HANDOVER REQUEST) to target side MME.
Step 304, after the MME of target side receives forward direction handoff request message, send handoff request message (HANDOVER REQUEST) for the eNB of target side, the eNB of target side returns handover request ack message (HANDOVER REQUESTACK) for the MME of target side after receiving this handoff request message.
Step 305 after the MME of target side receives handover request ack message, sends forward direction switching response message (FORWARD HANDOVER RESPONSE) for the MME of source.
Step 306, source and target side are carried out data cached forwarding.
Step 307, source MME sends switching command message (HANDOVERCOMMAND) for source eNB;
Step 308, source eNB sends Radio Resource control (RRC) message and gives user terminal UE; Main cell is the cell of physical channel aspect and some positional informations, when user terminal reshuffle finish after, send physical channel and reshuffle and finish the eNB of message to target.
Step 309, the MME of source sends the MME that target side given in forward direction SRNS context (FORWARDING SRNSCONTEXT), is used for telling the information such as transmission sequence of packet;
After the MME of target side receives forward direction SRNS context, send forward direction SRNS context response information (FORWARDING SRNS CONTEXT ACK), comprise information such as CAUSE in the message to the MME of source.
Step 310, target side eNB sends to switch and finishes (HANDOVER COMPLETE) message to target side MME.
Step 311, target side MME sends to the MME of source with this message after receiving handoff completion message, after the MME of source receives this message, return to switch to target side MME and finish response message.
Step 312, target side MME initiates bearer context update inquiry information (UPDATE BEARER CONTEXT REQUEST) to GATEWAY, and GATEWAY returns bearer context to target side MME and upgrades response message (UPDATE BEARER CONTEXT RESPONSE).
Step 313, source MME initiates the IU release command message to source eNB, and IU discharges the connection resource of eating dishes without rice or wine of source, and source eNB returns the connection resource Release complete of eating dishes without rice or wine to source MME.
The Routing Area Update process if this moment, variation took place in user terminal route district, so then takes place in step 314, and the Routing Area Update process here is a subclass of complete Routing Area Update process.
In above-mentioned flow process shown in Figure 3, step 303 sends forward direction handoff request message (FORWARD HANDOVER REQUEST) for source MME gives target side MME; The cell that comprises in this message has: block data protocol context (PDP Context), IMSI, Tunnel Endpoint IdentifierSignaling, MM Context, Target Identification, RAN Transparent Container, RANAP Cause, NRS, GCSI and RAT TYPE.
MME identifies the bearer types of self preserving in the block data protocol context that stores in the forward direction handoff request message, during switching, just carried this bearer types sign in the forward direction handoff request message among Fig. 3 in the step 303, the decision point (a) of the MME of target side between step 310 and step 311, perhaps decision point (b) between step 313 and the step 314, perhaps the decision point (c) after the step 314 is judged the bearer types sign, if default bearer exists, MME is no longer newly-built default bearer just, if default bearer does not exist, MME needs newly-built default bearer.The decision point (a) and (b) and (c) in Fig. 3 the with dashed lines frame table show, and decision point (a) and (b) or what (c) describe is possible position, it is optional when carrying out this process.
Selectable, do not carry the bearer types sign in the forward direction handoff request message in step 303, during switching, the GATEWAY of target SAE network side judges whether to exist default bearer according to whether having the data flow template in the carrying; If do not have data flow template or specific data flow template, then there is default bearer, not newly-built default bearer; Otherwise newly-built default bearer.Perhaps, GATEWAY judges whether to exist default bearer according to the sign of whether preserving default bearer and dedicated bearing in the carrying; If there is default bearer in the sign expression, do not need newly-built default existence, otherwise newly-built default bearer.
The GATEWAY of target SAE network side judges whether to exist default bearer in the decision point (d) of Fig. 3 according to said method; If there is not default bearer, then newly-built default bearer, otherwise, not newly-built default bearer.This decision point (d) can be positioned at after the step 314, certainly flexible change also can be done as the case may be in the position of this decision point, for example, be positioned at after the step 312, GATEWAY judges when not having default bearer, can set up default bearer by the indication of the response message in 312 MME, or after 312, send request or Indication message separately to MME before 314, set up default bearer.
Selectable, preserve the bearer types sign in the bearer context in the SAE network of source, can be preserve at GATEWAY with the corresponding bearer context of switching terminal in preserve the bearer types sign.Because GATEWAY is source SAE network and the shared anchor gateway of target SAE network, therefore switch GATEWAY in the target SAE network of back and be GATEWAY in the SAE network of source, the bearer types of being preserved on the GATEWAY sign nature target SAE network of also having arrived.After the switching, in target SAE network, GATEWAY judges the bearer types of switching terminal according to the bearer types sign of self preserving.
In target SAE network, as above-mentioned when judging bearer types by GATEWAY:
If default bearer set up process by the target mobile management entity MME in Fig. 3 (a) and (b) or (c) when initiating, whether GATEWAY needs to rebuild default bearer by showing in the cell of independent message or response message, or to indicate which carrying be default bearer, and which carrying is a dedicated bearing; Or directly the bearer types sign is sent to MME.
If default bearer is set up process and is initiated by GATEWAY, in the SAE network PDN GW, then PDN GATEWAY initiates to carry when setting up, and is indicated as being default bearer in message.
After switching to 2G/3G below in conjunction with accompanying drawing 4,5 pairs of user terminals of accompanying drawing from source SAE network, the concrete handoff procedure when switching to target SAE network again describes.
Fig. 4 is embodiment of the invention UE switches to the 2G/3G network from the SAE network a process flow diagram.As shown in Figure 4, this process specifically may further comprise the steps:
Step 401, the eNB of source makes a strategic decision, judges whether to initiate to switch (HANDOVER) flow process, be then to carry out switching initialization and execution in step 402.
Step 402, source eNB initiates handoff request message (HANDOVER REQUIRED) and gives source MME.
Step 403 after source MME receives handoff request message, sends forward direction handoff request message (FORWARD HANDOVER REQUEST) to target side SGSN.
Step 404, after the SGSN of target side receives forward direction handoff request message, send out handoff request message (HANDOVER REQUEST) for the radio network controller (RNC) of target side, the RNC of target side returns handover request ack message (HANDOVERREQUEST ACK) for the SGSN of target side after receiving this handoff request message.
Step 405 after the SGSN of target side receives switching request response, sends forward direction switching response message (FORWARD HANDOVER RESPONSE) for the MME of source.
Step 406, source and target side are carried out data in buffer and are transmitted.
Step 407, source MME sends switching command message (HANDOVERCOMMAND) for the eNB of source.
Step 408, source eNB sends RRC message to UE; Main cell is the cell of physical channel aspect and some positional informations, when user terminal reshuffle finish after, send physical channel and reshuffle and finish the RNC of message to target side.
Step 409, the eNB of source sends the MME that source given in forward direction SRNS context (FORWARDING SRNSCONTEXT);
The MME of source sends to the SGSN of target side with its forward direction SRNS context (FORWARDING SRNSCONTEXT) of receiving, is used for telling the information such as transmission sequence of packet;
After the SGSN of target side receives this message, send the MME that forward direction SRNS context response (FORWARDING SRNS CONTEXT ACK) is given source;
The SGSN of target side also sends forward direction SRNS context to target side RNC.
Step 410, target side RNC sends handoff completion message (HANDOVERCOMPLETE) to the SGSN of target side.
Step 411, target side SGSN is receiving handoff completion message (HANDOVERCOMPLETION) afterwards, sends the forward direction handoff completion message to the MME of source, the MME of source returns the SGSN of receiveing the response accordingly to target side after receiving this message.
Step 412, the SGSN of target side sends the bearer context update inquiry information to GATEWAY, and GATEWAY returns bearer context to the SGSN of target side and upgrades response message.
Step 413, source MME initiates the IU release command message to source eNB, and IU discharges the connection resource of eating dishes without rice or wine of source, and source eNB returns the connection resource Release complete of eating dishes without rice or wine to source MME.
Step 414, Routing Area Update process, the Routing Area Update process here are a subclass of complete Routing Area Update process.
In above-mentioned flow process shown in Figure 4, step 403 is sent out forward direction handoff request message for source MME gives target side SGSN.The cell that comprises in this message has: IMSI, Tunnel Endpoint IdentifierSignaling, MM Contex, PDP Context, Target Identification,, RAN TransparentContainer, RANAP Cause, NRS, GCSI, RAT TYPE.
When switching in the 2G/3G network, because the 2G/3G network is not distinguished default bearer and dedicated bearing, so dedicated bearing and default bearer are not carried out special processing, if in the SAE network of source, the bearer types sign has stored in the bearer context, then just carried this bearer types sign in the forward direction handoff request message of the step 403 of Fig. 4, if the bearer types sign has not stored in the bearer context, then the forward direction handoff request message in the step 403 of Fig. 4 can not carried this bearer types sign yet.
Fig. 5 be embodiment of the invention UE on switching infrastructure shown in Figure 4, switch back the process flow diagram of SAE network by the 2G/3G network.As shown in Figure 5, specifically may further comprise the steps:
Step 501, the RNC of source Access Network part makes a strategic decision, judges whether to initiate to switch (HANDOVER) flow process, be then to carry out switching initialization and execution in step 402.
Step 502, source RNC initiates handoff request message (HANDOVER REQUIRED) and gives source SGSN.
Step 503 after source SGSN receives handoff request message, sends forward direction handoff request message (FORWARD HANDOVER REQUEST) for target side MME.
Step 504, after the MME of target side receives forward direction handoff request message, send handoff request message (HANDOVER REQUEST) for the eNB of target side, the eNB of target side returns handover request ack message (HANDOVER REQUESTACK) for the MME of target side after receiving this handoff request message.
Step 505 after the MME of target side receives handover request ack message, sends out forward direction switching response message (FORWARD HANDOVER RESPONSE) for the SGSN of source.
Step 506, source and target side are carried out data in buffer and are transmitted.
Step 507, source SGSN sends switching command message (HANDOVERCOMMAND) for the RNC of source.
Step 508, source RNC sends out RRC message and gives user terminal UE; Main cell is the cell of physical channel aspect and some positional informations, when user terminal reshuffle finish after, send physical channel and reshuffle and finish the eNB of message to target.
Step 509, the RNC of source sends the SGSN that source given in forward direction SRNS context (FORWARDING SRNSCONTEXT);
The SGSN of source sends the MME that the target example given in forward direction SRNS context (FORWARDING SRNS CONTEXT), is used for the information such as transmission sequence of transfer data packets;
After the MME of target side receives this message, send the SGSN that forward direction SRNS context response information (FORWARDING SRNS CONTEXT ACK) is given source;
The MME of target side also sends forward direction SRNS context to the eNB of target side.
Step 510, target side eNB sends handoff completion message (HANDOVERCOMPLETE) to the MME of target side.
Step 511, target side MME is receiving handoff completion message (HANDOVER COMPLETION) afterwards, sends the forward direction handoff completion message to the SGSN of source, the SGSN of source receives to return after this message receives the response accordingly to target side MME.
Step 512, the MME of target side sends bearer context update inquiry information (UPDATE BEARER CONTEXT REQUEST) to GATEWAY, and GATEWAY returns bearer context to the MME of target side and upgrades response message (UPDATE BEARER CONTEXT RESPONSE).
Step 513, source SGSN initiates the IU release command message to source RNC, and IU discharges the connection resource of eating dishes without rice or wine of source.Source RNC returns the connection resource release of eating dishes without rice or wine to source SGSN and finishes response message.
Step 514, Routing Area Update process, the Routing Area Update process here are a subclass of complete Routing Area Update process.
In above-mentioned flow process shown in Figure 5, step 503 is that source SGSN sends forward direction handoff request message (FORWARD HANDOVER REQUEST) for target side MME.The cell that comprises in this message has IMSI, Tunnel Endpoint Identifier Signaling, MM Context, PDP Context, TargetIdentification, RAN Transparent Container, RANAP Cause, NRS, GCSI and RATTYPE.
Because, carried the bearer types sign in the forward direction handoff request message of the step 403 of Fig. 4, therefore, when UE switches back the SAE network once more, this bearer types sign can be transferred to target SAE network along with the PDP Context in the forward direction handoff request message, be to carry this bearer types sign in the forward direction handoff request message of the step 503 among Fig. 5, the decision point (a) of the MME of target side between step 510 and step 511, perhaps decision point (b) between step 513 and step 514, perhaps the decision point after step 514 (c) is judged the bearer types sign, if default bearer exists, the then not newly-built default bearer of MME, do not exist as if default bearer, then the newly-built default bearer of MME.(a) and (b) or what (c) describe is possible position, it is optional when carrying out this process.
Selectable, do not carry the bearer types sign in the PDP Context in the forward direction handoff request message in the step 403 of Fig. 4, just do not carry this bearer types sign in the forward direction handoff request message of the step 503 of Fig. 5 yet.The GATEWAY of target side judges whether TFT is arranged in the PDP Context, TFT is arranged, then think dedicated bearing in decision point (d), does not have TFT and specific TFT, then thinks default bearer.If default bearer exists, then do not initiate the request of newly-built default bearer, alleviate the burden of target SAE network side GATEWAY greatly, saved the spent Internet resources of newly-built default bearer; If default bearer does not exist, GATEWAY initiatively initiates newly-built default bearer request in decision point (d) from network side, has guaranteed the normal switching of user terminal.Decision point (d) can be positioned at after the step 514, when decision point (d) is carried out is optional, for example, as be positioned at after the step 512, GATEWAY judges when not having default bearer, can set up default bearer by the indication of the response message in 512 MME, or after 512, send request or Indication message separately to MME before 514, set up default bearer.
Three, user terminal directly switches to the SAE network from non-SAE network
Be that example describes still below with the 2G/3G network.
Owing to do not distinguish default bearer and dedicated bearing in the 2G/3G network, when PDP Context when the 2G/3G network is sent to the SAE network, the MME of SAE network can't identify default bearer, and then also can't judge whether will be the newly-built default bearer of user terminal.
When making user terminal switch to the SAE network by the 2G/3G network, the MME of SAE network can identify default bearer, embodiments of the invention also provide the scheme of discerning default bearer and dedicated bearing in a kind of SAE network, this scheme comprises: in the 2G/3G network, increase the bearer types sign for carrying in PDP Context; When UE when the 2G/3G network switches to the SAE network, in forward direction handoff request message, carry described bearer types sign; MME in the SAE network judges whether to exist default bearer according to the sign of the bearer types in the described forward direction handoff request message; If have default bearer, then not newly-built default bearer; Otherwise newly-built default bearer.Alleviate the burden of target SAE network side MME so greatly, saved the spent Internet resources of newly-built default bearer, the MME of target side judges the non-existent words of default bearer, and newly-built default bearer has guaranteed the normal switching of user terminal.
User terminal directly switches to the idiographic flow of SAE network by the 2G/3G network also can be with reference to flow process shown in Figure 5, at this moment, in the step 503, comprise the bearer types sign in the PDP Context of the SGSN in the 2G/3G network to the forward direction handoff request message of the transmission of the MME in the target SAE network.The method that increases the bearer types sign in the PDP Context of described forward direction handoff request message is as follows:
Mode one: SGSN decodes to PDP carrying relevant between user terminal and the core net, be decoded to Non-Access Stratum (NAS, Non Access Stratum) cell, in the cell of this NAS layer, increase the bearer types sign according to whether having TFT or not having specific TFT, and this bearer types sign is stored in the PDP Context.
Mode two: whether terminal or GGSN have TFT or do not have specific TFT in the PDP carrying by message informing SGSN, and SGSN increases corresponding bearer types sign according to notification message, and this bearer types sign is stored in the PDP Context.
And the bearer types label manner is corresponding with increasing in the SAE network, and in the 2G/3G network, the method that increases the bearer types sign can be following several forms:
(a) add the bearer types sign to do not have TFT/ that the carrying of specific T FT is arranged or TFT is arranged carrying, being does not have TFT or has the carrying of specific T FT to add the bearer types sign, for the bearer types sign is not added in the carrying that TFT is arranged; Perhaps add the bearer types sign, for not having TFT or having the carrying of specific T FT not add the bearer types sign for the carrying that TFT is arranged.
(b) SGSN adds the default bearer type identification to do not have TFT or specific T FT is arranged carrying, the dedicated bearing type identification is added to the carrying that TFT is arranged.
(c) SGSN does not have TFT or has the carrying of specific T FT to compose respectively with different bearer types ident values with the carrying that TFT is arranged.
(d) carrying of adopting the proprietary value of cell to represent there is not the carrying of TFT or TFT is arranged.
For example, adopt cell NSAPI (network layer Operational Visit dot mark symbol) to represent default bearer.
During switching, the bearer types that increases in 2G/3G network sign is along with after handoff procedure is transferred to target SAE network, the MME of target side judges whether to exist default bearer at the decision point (a) and (b) or (c) by this bearer types sign, if default bearer exists, then need not newly-built default bearer, otherwise newly-built default bearer.
Selectable, target SAE network can also judge whether default bearer exists by following manner:
Need not in the 2G/3G network increases the bearer types sign into PDP Context, during switching, do not carry this bearer types sign in the forward direction handoff request message, the GATEWAY of target SAE network side judges in the carrying whether have TFT before in decision point (d) or at (d), if do not have TFT or specific TFT in the carrying, think default bearer, do not initiate the request of newly-built default bearer; If in the carrying TFT is arranged, then think dedicated bearing, need set up default bearer, then GATEWAY initiatively initiates newly-built default bearer request or indicates MME to set up default bearer from network side.
When user terminal when the Non-3GPP network switches to the SAE network, the scheme of identification bearer types in the SAE network, similar with above-mentioned situation when the 2G/3G network switches to the SAE network, preserve the bearer types sign in the context of the carrying that can in the Non-3GPP network, set up, when user terminal when described Non-3GPP network switches to target SAE network, carry the bearer types sign of preserving in the described bearer context in the forward direction handoff request that the mobile management entity of handed over service entity in the Non-3GPP network in target SAE network initiated, the mobile management entity in the target SAE network is judged the type of carrying according to the bearer types sign of carrying in the described forward direction handoff request.In the Non-3GPP network, can distinguish default bearer and dedicated bearing, no longer repeat here by whether having TFT or whether have specific TFT.
Provide the structured flowchart of a kind of mobile management entity of the present invention and a kind of anchor gateway based on the foregoing description.
Fig. 6 is the structured flowchart of a kind of mobile management entity of the embodiment of the invention.As shown in Figure 6, this mobile management entity comprises: handoff request sending module 601 and/or handoff request receiver module 602, wherein,
Handoff request sending module 601 is used to send forward direction handoff request message, the bearer types sign of carrying in the bearer context in this forward direction handoff request message to be preserved.
Handoff request receiver module 602 is used to receive the forward direction handoff request message of carrying the bearer types sign, and judges bearer types according to the sign of the bearer types in the handoff request message.
Mobile management entity shown in Figure 6 can further include load creating module 603.At this moment, handoff request receiver module 602 is further used for when judging bearer types and be non-default bearer, and indication load creating module 603 is set up default bearer; Load creating module 603 is used for setting up default bearer after the indication that receives the handoff request receiver module.
Fig. 7 is the structured flowchart of a kind of anchor gateway of the embodiment of the invention.This anchor gateway comprises as shown in Figure 7: preserve module 701 and judge module 702, wherein,
Anchor gateway shown in Figure 7 can further include load creating module 703.At this moment, judge module 702 is further used for when judging bearer types and be non-default bearer, and indication load creating module 703 is set up default bearer; Load creating module 703 is used for setting up default bearer after the indication that receives judge module 702.
Need to prove, it is main in the above-described embodiments that what describe is the scheme how the switching target network of user terminal discerns bearer types when being the SAE network, when the switching target network of user terminal is non-SAE network, as 2G/3G network etc., can use scheme in the foregoing description to be implemented in equally and discern bearer types in the objective network, as long as the target SAE network in the foregoing description is replaced with non-SAE network, no longer repeat here.
In sum, adopt embodiments of the invention, when in network, needing to set up carrying, by representing default bearer or dedicated bearing for carrying increase bearer types identifies, gateway just can be according to this bearer types sign identification default bearer and dedicated bearing, for dedicated bearing distribution T FT, dedicated bearing is normally set up, thereby made user terminal carry out normal data communication by dedicated bearing.In handoff procedure, the MME in the objective network can identify according to this bearer types and judge whether the newly-built default bearer of needs, if there is default bearer, need not newly-built default bearer, will greatly alleviate the objective network burden, save Internet resources; If there is no default bearer, then newly-built default bearer ensures that user terminal normally switches.When the 2G/3G network switches to objective network, increased the bearer types sign of expression default bearer or dedicated bearing, make the MME in the objective network judge according to this bearer types sign whether default bearer exists, if there is default bearer, need not newly-built default bearer, will greatly alleviate the objective network burden, save Internet resources; If there is no default bearer, then newly-built default bearer ensures that user terminal normally switches.
Abovely the present invention is described in conjunction with preferred embodiment; but not in order to restriction the present invention; those skilled in the art should know; the change and the modification of the equivalent purpose of being done in the range of application of all thought at embodiments of the invention all should be within the protection ranges of present patent application.
Claims (15)
1. a method of discerning bearer types is characterized in that, this method comprises:
In source network, use the bearer types of bearer types mark for marking user terminal, and in source network, preserve described bearer types sign;
Switch to from source network the process of objective network at described user terminal, described bearer types sign is delivered to objective network;
Objective network identifies the bearer types of judging described user terminal according to described bearer types;
Wherein, described bearer types with bearer types mark for marking user terminal comprises:
Only increase the default bearer type identification for default bearer;
Or, only increase the dedicated bearing type identification for dedicated bearing;
Or, for default bearer increases the default bearer type identification, for dedicated bearing increases the dedicated bearing type identification;
Or, for default bearer and dedicated bearing increase different bearer types ident values respectively;
Or, adopt the proprietary value of cell to represent default bearer;
Or, adopt the proprietary value of cell to represent dedicated bearing.
2. the method for claim 1 is characterized in that, when described source network and objective network all are System Architecture Evolution SAE network,
The described bearer types sign of preserving in source network comprises: preserve on the mobile management entity in the SAE network of source corresponding to the bearer context of described user terminal in preserve the bearer types sign;
Describedly bearer types sign is delivered to objective network comprises: carry described bearer types sign in the forward direction handoff request that the mobile management entity of the mobile management entity in the SAE network of source in target SAE network initiated.
3. the method for claim 1 is characterized in that, when described source network and objective network all are the SAE network,
The described bearer types sign of preserving in source network comprises: preserve on the anchor gateway in the SAE network of source corresponding to the bearer context of described user terminal in preserve the bearer types sign;
Describedly bearer types sign is delivered to target SAE network comprises: the shared anchor gateway of source SAE network and target SAE network, the anchor gateway in the target SAE network is the anchor gateway in the former network;
The network based described bearer types of described target SAE identifies judges that bearer types comprises: described anchor gateway, that preserves according to self judges bearer types corresponding to the sign of the bearer types in the bearer context of described user terminal.
4. method as claimed in claim 3 is characterized in that, this method further comprises after described anchor gateway is judged bearer types according to the bearer types sign:
Anchor gateway identifies described bearer types the mobile management entity that sends in the target SAE network; Or
Anchor gateway sends according to the mobile management entity of described bearer types sign in target SAE network and set up/does not set up the message of default bearer;
5. as claim 2 or 3 described methods, it is characterized in that, the described bearer types of bearer types mark for marking user terminal that uses in source network comprises: setting up of initiating when creating carrying in the SAE network of source increases the bearer types sign in the bearing request message, according to the type of the carrying of the bearer types mark for marking in the bearing request message.
6. the method for claim 1 is characterized in that, when described source network is the 2G/3G network, and when described objective network is the SAE network,
The described bearer types sign of preserving in source network comprises: the Serving GPRS Support Node in the 2G/3G network of source is preserved the bearer types sign in the packet data protocol PDP Context;
The described bearer types sign is carried in the target SAE network comprises: carry described bearer types sign in the forward direction handoff request that the mobile management entity of the Serving GPRS Support Node in the 2G/3G network of source in target SAE network initiated.
7. method as claimed in claim 6 is characterized in that, the described bearer types of bearer types mark for marking user terminal that uses in source network comprises:
Serving GPRS Support Node in the 2G/3G network of source carries the PDP between the core net in user terminal and the source 2G/3G network decodes, after being decoded to the cell of Non-Access Stratum, whether the data flow template is arranged or whether have specific data flow template according to this PDP carrying, determine the bearer types sign corresponding with carrying; Perhaps
Whether Gateway GPRS Support Node has the data flow template or does not have specific data flow template by Serving GPRS Support Node PDP carrying in the 2G/3G network of message informing source in user terminal or the source 2G/3G network, and Serving GPRS Support Node is determined the bearer types sign corresponding with carrying according to described message.
8. as claim 2 or 6 described methods, it is characterized in that when the bearer types of judging described user terminal when described target SAE network was non-default bearer, this method further comprised:
In the handoff procedure of user terminal, behind the handoff completion message that the base station eNB in the evolution of the mobile management entity in the target SAE network in receiving target SAE network sends, for described user terminal is set up default bearer; Perhaps
In the handoff procedure of user terminal, the mobile management entity in the target SAE network is after the connection resource release of eating dishes without rice or wine of source network side finishes, for described user terminal is set up default bearer; Perhaps
In the handoff procedure of user terminal, the mobile management entity in the target SAE network is after the Routing Area Update of user terminal finishes, for described user terminal is set up default bearer.
9. a mobile management entity is characterized in that, this mobile management entity comprises: handoff request sending module and/or handoff request receiver module, wherein,
The handoff request sending module is used to send forward direction handoff request message, the bearer types sign of carrying in the bearer context in this forward direction handoff request message to be preserved;
The handoff request receiver module is used to receive the forward direction handoff request message of carrying the bearer types sign, and judges bearer types according to the sign of the bearer types in the handoff request message;
Wherein, described bearer types comprises default bearer and dedicated bearing.
10. mobile management entity as claimed in claim 9 is characterized in that this mobile management entity further comprises the load creating module,
Described handoff request receiver module is further used for when judging bearer types and be non-default bearer, and indication load creating module is set up default bearer;
Described load creating module is used for setting up default bearer after the indication that receives the handoff request receiver module.
11. an anchor gateway is characterized in that, this anchor gateway comprises: preserve module and judge module, wherein,
Preserve module, be used to preserve the bearer context of the user terminal that comprises the bearer types sign;
Judge module is used for the bearer types according to the described user terminal of bearer types sign judgement of preserving module.
Wherein, this anchor gateway also comprises the load creating module,
Described judge module is further used for when judging bearer types and be non-default bearer, and indication load creating module is set up default bearer;
Described load creating module is used for setting up default bearer after the indication that receives judge module.
12. a method of discerning bearer types is characterized in that, this method comprises:
Setting up of initiating when creating carrying in the SAE network of source increases the bearer types sign in the bearing request message, and preserves described bearer types sign in the bearer context of set up carrying;
When user terminal when source SAE network switches to target SAE network, when perhaps switching to the SAE network again after source SAE network switches to other networks, this method is further comprising the steps of:
During switching, in forward direction handoff request message, carry described bearer types sign;
Mobile management entity in the target SAE network judges whether to exist default bearer according to the bearing identification in the described forward direction handoff request message, is then not newly-built default bearer; Otherwise newly-built default bearer.
13. a method of discerning bearer types is characterized in that, when user terminal when source SAE network switches to target SAE network, when perhaps switching to the SAE network again after source SAE network switches to other networks, this method comprises:
The grouped data network gateway of target SAE network side judges whether to exist default bearer according to whether having the data flow template and/or whether have specific data flow template in the carrying;
There is default bearer, then not newly-built default bearer, otherwise newly-built default bearer.
14. a method of discerning bearer types is characterized in that, this method comprises:
In the 2G/3G network, in PDP Context, increase the bearer types sign for carrying;
When the 2G/3G network switches to the SAE network, in forward direction handoff request message, carry described bearer types sign at user terminal;
Mobile management entity in the SAE network judges whether to exist default bearer according to the sign of the bearer types in the described forward direction handoff request message;
If have default bearer, then not newly-built default bearer; Otherwise newly-built default bearer.
15. method according to claim 14 is characterized in that, the described step that increases the bearer types sign in PDP Context comprises:
PDP carrying relevant between user terminal and the core net is decoded, separate the cell of non-access NAS layer, in the cell of this NAS layer, increase the bearer types sign, and this bearer types sign is stored in the PDP Context;
Perhaps, by message the PDP carrying is sent to Serving GPRS Support Node, Serving GPRS Support Node is that the PDP carrying increases the bearer types sign, and this bearer types sign is stored in the PDP Context.
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| CN101986750B (en) * | 2009-07-29 | 2013-08-28 | 上海华为技术有限公司 | Switching control method, device and system |
| CN101998353A (en) | 2009-08-20 | 2011-03-30 | 中兴通讯股份有限公司 | Bearer type indicating method, base station and system |
| CN102026409B (en) * | 2009-09-22 | 2015-05-13 | 中兴通讯股份有限公司 | System and method for releasing local internet protocol (IP) access connection |
| WO2011085578A1 (en) * | 2010-06-28 | 2011-07-21 | 华为技术有限公司 | Method for acquiring bearer identity of the objective side bearer, bearer management network element and packet data gateway |
| EP2772029B1 (en) * | 2011-10-28 | 2017-03-01 | Telefonaktiebolaget LM Ericsson (publ) | Ipv6 transition tool handling |
| WO2014089835A1 (en) * | 2012-12-14 | 2014-06-19 | 华为技术有限公司 | Bearer processing method, apparatus and system |
| CN104380796B (en) * | 2013-06-03 | 2018-05-18 | 华为技术有限公司 | A kind of switching method and equipment of no default bearing |
| US10506472B2 (en) * | 2016-11-03 | 2019-12-10 | Qualcomm Incorporated | Narrowband reference signals in non-anchor resource blocks |
| CN111034155B (en) * | 2017-09-15 | 2020-12-04 | Oppo广东移动通信有限公司 | Method and device for changing bearer type and computer storage medium |
| CN109362109B (en) * | 2018-11-26 | 2022-01-11 | 武汉虹信科技发展有限责任公司 | Method and device for recovering proprietary bearer of mobile terminal in S1 handover process |
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