CN101128042A - Communication method for mobile terminal and access gateway - Google Patents
Communication method for mobile terminal and access gateway Download PDFInfo
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- CN101128042A CN101128042A CNA2006101152774A CN200610115277A CN101128042A CN 101128042 A CN101128042 A CN 101128042A CN A2006101152774 A CNA2006101152774 A CN A2006101152774A CN 200610115277 A CN200610115277 A CN 200610115277A CN 101128042 A CN101128042 A CN 101128042A
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Abstract
The utility model discloses a communication method for mobile terminal and access gateway, which is characterized in that the mobile terminal carries out switching between access gateways and makes successful context transference, the destination access gateway becomes the service access gateway. Said destination access gateway receives the signaling of the mobile terminal sent to the source access gateway and processes the signaling according to the context information. The utility model has the advantages that the destination access gateway can process normally the signaling even if receiving wrong destination address between the mobile terminal and the access gateway, furthermore, the process is transparent for the mobile terminal, the mobile terminal can be in ignorance of any change of the service access gateway and thus can be compatible preferably with the prior mobile terminal.
Description
Technical field
The present invention relates to professional mobile management field, the communication means of particularly a kind of portable terminal and IAD.
Background technology
The CDMA2000 system comprises CDMA 1x network and HRPD (high rate packet data) (HRPD) network, and the data rate up to 153.6kbps can be provided, and supports grouping data services such as video request program (VOD), network gaming, high-speed data download.In the CDMA2000 system, it is very important carrying out the service mobility management effectively, and one of purpose of professional mobile management is to guarantee professional continuity when the transition of portable terminal occurrence positions.
The packet domain structure chart of CDMA2000 system as shown in Figure 1, among the figure solid line be the carrying data transmission channel, dotted line is the transmission channel of signaling.Packet data serving node (PDSN) inserts IP network by PPP(Point-to-Point Protocol) with portable terminal, and the route of next jumping is provided for packet data package simultaneously, and by IP control protocol (IPCP) be portable terminal distributing IP address.
In the CDMA2000 system, if switch between the Access Network (AN) that connects identical PDSN, the service PDSN before and after promptly switching is same PDSN, and then this switching is called as in the PDSN switches; If switch between the AN that connects different PDSN, the service PDSN before and after promptly switching is not same PDSN, and this switching is called as between PDSN switches.For switching in the PDSN, owing to do not change access point, do not relate to the change of IP address, can keep professional continuity so only need to carry out link switchover.And for switching between PDSN, change has taken place in access point, and can't keep professional continuity this moment by simple link switchover, need otherwise keep professional continuity.
In CDMA 1x system, when the coverage that moves to another PDSN in terminal causes switching between PDSN, carry out forwarding of data by layer two tunnel between two PDSN, make the PPP end points maintain source PDSN and do not change access point, the address that can keep terminal is constant, thereby keeps professional continuity.
But, if the PPP end points maintains source PDSN and does not change, can cause during the alive packet session, A10 connect and PDSN-PDSN (P-P) between be connected existence simultaneously, thereby increased the burden of source PDSN, consumed the processing resource of source PDSN and the link circuit resource between PDSN.So between the PDSN of HRPD network in the handoff procedure, the session state transfer of the source PDSN target P DSN after switch can be gone up, make the Network Access Point of portable terminal become target P DSN.The network architecture of between the PDSN of HRPD network, switching as shown in Figure 2, HA is the home agent among the mobile IP among the figure, S-PDSN is source PDSN, T-PDSN is target P DSN, S-AN is the source access network equipment, T-AN is a target access network equipment.The P-P interface is used in the handoff procedure user data encapsulation back being transmitted between PDSN between PDSN.Terminal will be transferred to target access gateway at the session status of source access gateway after carrying out the context transfer process, and target access gateway is rebuild session status according to the contextual information that shifts, and become the end points of data session.In the process of context transfer, target access gateway can obtain the address that source access gateway is used for signaling process by signaling.When using PPP as the agreement of data link layer, target access gateway is the end points of PPP just.After the transfer, the signaling between IAD and the terminal will be handled by the target access gateway after switching.The session status of portable terminal comprises ppp state, Qos parameter, mobility status etc.
Its switching flow specifically comprises as shown in Figure 3:
1) portable terminal carries out switching between PDSN, sets up target access network and connects to the A10 between target P DSN;
2) the target P DSN P-P that is established to source PDSN connects, and source PDSN is transferred to target P DSN with session context information such as peer-peer protocol (PPP) state of this portable terminal, QoS parameter, mobility status, and target P DSN sets up the session status of this terminal;
3) source PDSN connects to target P DSN transmission data by P-P, and target P DSN forwards the data to target access network, and corresponding session management and data processing are all carried out at target P DSN, and the IP address of portable terminal remains unchanged;
4) source PDSN discharge with the source Access Network between A10 be connected.
In addition, target P DSN also can use the proxy-mobile IP signaling to register to home agent (HA) after portable terminal takes place to switch between PDSN, and the IP address of portable terminal and the address of target P DSN are bound, at this moment, HA can again that the outside is next grouped data not send to source PDSN.When mobile terminal sleep or again during consulting session, perhaps target P DSN has carried out by proxy-mobile IP after HA registers, and target P DSN discharges its P-P to source PDSN and connects.
At present, third generation partner plans 2 (3GPP2) normal structure and is carrying out the research of network evolution items, its main purpose strengthens packet switched capabilities exactly, simplifies network configuration, improves QoS, reduces time delay, improves user data rate, improves power system capacity and coverage rate, minimizing operation cost etc., make packet network after the evolution that the carrying to real time business and non-real-time service can more effectively be provided, for the user provides abundant more business.
The structure of evolvement network wherein, is controlled access point (CAP) and is had the function of IAD (AGW) and RRM as shown in Figure 4.The major function of IAD is first hop router as portable terminal, and the function of the former PDSN of part such as mobile management, QoS support.And RRM comprises public resource management, private resource management, wireless session management, the session status of safeguarding portable terminal, Radio Link Management etc.Network mobility agency (NMA) provides layer three (L3) mobility management mechanism between the CAP, does not need the mobile IP signaling of eating dishes without rice or wine.
Portable terminal is when cut-in evolution network, and effective in the scope of whole NMA by the address that CAP obtains, CAP registers binding with the address of portable terminal and the address of CAP itself at NMA, so that data can correct route.So when carrying out switching between the CAP, do not need to change the address.After the registration binding, the grouped data of the portable terminal that NMA receives will send to target CAP, be forwarded to portable terminal by target CAP again.Its switching flow is specially:
1) portable terminal carries out switching between CAP, and source CAP is transferred to target CAP by signaling with the session context information of portable terminal;
2) target CAP initiates the registration binding to NMA, and correspondence is carried out in the address of portable terminal and the address of target CAP.After the registration binding, the grouped data that sends to portable terminal that NMA receives will be transmitted to target CAP, be transferred to portable terminal by target CAP again.
Between above-mentioned AGW in the handoff procedure, comprise switch between the PDSN in CDMA 1x network, the HRPD network and evolvement network in CAP between switch, portable terminal does not also know to switch the address of back AGW.When portable terminal and AGW carried out Signalling exchange, the target of signaling remained source AGW.After target AGW received signaling between portable terminal and AGW, because the destination address of signaling is not oneself, can cause can't normal process.
For example, in the HRPD network, if taken place to switch between PDSN, the session state transfer of portable terminal has arrived the target P DSN after switching, and the stream mapping also target P DSN after switching is carried out.In case any composition of traffic flow template (TFT) changes, change as increase/deletion Media Stream, change stream processing mode, destination address or port, portable terminal will use resource reservation protocol (rsvp) signaling update TFT.But because terminal and do not know that the PDSN of managing mobile terminal shifts, so the destination address of RSVP message remains source PDSN's.After target P DSN receives RSVP message, because destination address is not oneself, target P DSN will can not handle accordingly.Can cause portable terminal can't carry out TFT like this and upgrade operation.
Summary of the invention
In view of this, the purpose of this invention is to provide the communication means of a kind of portable terminal and IAD, make portable terminal after taking place to switch between IAD, portable terminal that new target access gateway can normal process receives and the signaling between IAD.
For achieving the above object, technical scheme of the present invention is achieved in that
The communication means of a kind of portable terminal and IAD comprises:
Portable terminal carries out switching between IAD, and successfully carries out context transfer, and target access gateway becomes the service IAD;
Described target access gateway receives the signaling that described portable terminal sends to source access gateway, and according to described contextual information this signaling is handled.
When described contextual information shifted, the IAD before switching sent to target access gateway with source access gateway address, and described target access gateway obtains this address and preserves.
Switching between IAD has at least once taken place in described portable terminal before switching to target access gateway, the IAD of then described portable terminal before switching for the first time takes place is source access gateway.
Described target access gateway also comprises after signaling is handled: described target access gateway is replied to portable terminal described signaling according to result.
The source address of the signaling that described target access gateway is replied is the destination address of the described portable terminal signaling that sends to source access gateway or the address of target access gateway self.
This method also further comprises: described target access gateway is given portable terminal with self address notification.
Described target access gateway is to the method for portable terminal self address notification: send the IP configuration request message of carrying self address to portable terminal.
Described target access gateway is to the method for portable terminal self address notification: manufacturer's Extended Protocol message of replying the peer-peer protocol that carries self address to portable terminal.
Described target access gateway is to the method for portable terminal self address notification: the session updates message that will carry self address by the A11 interface sends to the targeted packets controlled function, described targeted packets controlled function is given target access network with described address notification, and described target access network utilizes space interface signaling with described address notification portable terminal.
Described target access gateway is to the method for portable terminal self address notification: carry the address of self by reply router advertisement message or proxy announcement message to portable terminal.
Described target access gateway is to the method for portable terminal self address notification: the address of carrying self by space interface signaling.
The present invention by portable terminal when communicating by letter with target access gateway, in a single day target access gateway receives destination address is when switching the signaling of preceding source access gateway, promptly this signaling is handled, even also can be when making the signaling of target access gateway between portable terminal that receives the destination address mistake and IAD normally to its processing according to the contextual information that in handoff procedure, obtains.And this process is transparent to portable terminal, and portable terminal can not know to serve the change of IAD, like this can better compatible original portable terminal.
Description of drawings
Fig. 1 is the packet domain structure chart of CDMA2000 system in the background technology;
The network architecture diagram that Fig. 2 switches between the PDSN of HRPD network for portable terminal in the background technology;
The flow chart that Fig. 3 switches between the PDSN of HRPD network for portable terminal in the background technology;
Fig. 4 is the structure chart of evolvement network in the background technology;
Fig. 5 is the flow chart of the communication means of portable terminal and IAD in the embodiments of the invention one;
Fig. 6 is the flow chart of the communication means of portable terminal and IAD in the embodiments of the invention two;
Fig. 7 is the flow chart of the communication means of portable terminal and IAD in the embodiments of the invention three.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The present invention by portable terminal when communicating by letter with target access gateway, in a single day target access gateway receives destination address is when switching the signaling of preceding source access gateway, promptly this signaling is done respective handling, even also can normal process when making the signaling of target access gateway between portable terminal that receives the destination address mistake and IAD.IAD of the present invention includes but are not limited to PDSN and CAP.
Embodiment one:
Fig. 5 is the flow chart of the communication means of portable terminal and IAD in the embodiments of the invention one, specifically may further comprise the steps:
Whether the destination address that target access gateway can further be judged this signaling the address of source access gateway, if then carry out subsequent treatment, otherwise abandon or refuse this signaling.The address of source access gateway obtains in the context transfer process.
If portable terminal is before switching to target access gateway, carried out the switching between IAD at least once, then the foundation of Pan Duaning is whether the destination address of this signaling is the address of the source access gateway before taking place to switch between IAD for the first time.
For example the terminal of carrying out session moves, 2 switching takes place from IAD 1 to IAD after, switch to IAD 3 from IAD 2 again, IAD 3 is last target access gateways that switch.After IAD 3 is received the signaling that portable terminal sends to IAD, judge destination address whether the address of source access gateway be to judge according to the address of IAD 1, i.e. the source access gateway address that switches for the first time.The address of IAD 1 is sent to IAD 2 and preserves in the signaling of context transfer, when carrying out 3 switchings of IAD 2 and IAD, be sent to IAD 3 again in the signaling of context transfer.
Embodiment two:
Present embodiment is to use based on the Resv message transmission TFT information of RSVP to come technical scheme of the present invention is further specified as example to PDSN with portable terminal in the HRPD network.
Fig. 6 is the flow chart of the communication means of portable terminal and IAD in the embodiments of the invention two, specifically may further comprise the steps:
Step 601, portable terminal take place to switch between PDSN, successfully carry out the context transfer between PDSN.In this step, source PDSN passes to target P DSN with the address information that is used for signaling between portable terminal and PDSN of oneself.If source PDSN had carried out switching between PDSN before switching, then the address information of Chuan Diing is the PDSN address, source of switching between initial PDSN.
Except that general IPv4 address and IPv6 address, when using mobile IPv 4, this address can be the foreign agent care-of address (FA CoA) of source PDSN, and when using IPv6, this address can be the interface identifier (Interface identifier) of source PDSN.
Step 602, target P DSN rebulid session status according to the contextual information that receives, and become service PDSN.
Step 603, portable terminal are that destination address sends the signaling between portable terminal and PDSN with source PDSN, for example use the RSVP signaling to carry out the renewal of TFT.If carried out repeatedly switching between PDSN, then this destination address is the PDSN address, source of switching for the first time.Target P DSN receives the back and judges whether the destination address of this signaling is the address of source PDSN, if then execution in step 604; Otherwise directly abandon or reply refuse information, for example can return ResvErr message, indication service IAD changes.
Target P DSN can be 3455 according to the target port of Resv signaling, perhaps judges whether to comprise the 3GPP2_Object object and confirms that this Resv signaling is the signaling between portable terminal and PDSN.
Step 604, target P DSN handle the Resv signaling, carry out the TFT information processing, mainly are to upgrade the former TFT information that comprises in the contextual information according to the TFT composition that changes on portable terminal that receives.
In step 603, target P DSN can not judge the destination address of signaling yet, promptly carries out subsequently processing as long as this signaling is a Resv signaling between portable terminal and PDSN, like this, can transmit the address information of source PDSN in the step 601.
Further, after all active session all finished on the portable terminal, target P DSN can give portable terminal with the address notification of self, and advice method has following several:
1) sends IP configuration request message (IP Configure Request), wherein carry target P DSN its own IP address, use IPv6CP during IPv6, carry the Interface identifier of self.
2) use manufacturer's Extended Protocol of peer-peer protocol (PPP), self PDSN address or Interface identifier sent to portable terminal.
3) target P DSN passes through the address notification Packet Control Function (PCF) of the session updates message (A11-SessionUpdate) of A11 interface with self, PCF gives Access Network (AN) by A9-Update-A8 message with this address notification, with this address notification portable terminal, this space interface signaling can use General attribute update protocol (GAUP) message to AN with space interface signaling.
4) target P DSN can send router advertisement message (Router Advertisement) and notify the address of self.
5) if portable terminal is supported mobile IPv 4, target P DSN can send the address of proxy announcement message (Agent Advertisement) notice portable terminal self.
Embodiment three:
Present embodiment is to use based on the Resv message transmission TFT information of RSVP to come technical scheme of the present invention is further specified as example to PDSN with portable terminal in evolvement network.
Fig. 7 is the flow chart of the communication means of portable terminal and IAD in the embodiments of the invention three, specifically may further comprise the steps:
Step 701, portable terminal take place to switch between CAP, have successfully carried out the context transfer between CAP.Source CAP passes to target CAP with the address information that is used for signaling between portable terminal and CAP of self.If carried out repeatedly switching between CAP, transmission be source CAP address information before switching for the first time.
Except that general IPv4 address and IPv6 address, when using mobile IPv 4, CAP address, source can be the FA CoA of source CAP, and when using IPv6, this address can be the Interfaceidentifier of source CAP.
Step 702, target CAP rebulid session status according to the contextual information that receives, and become service CAP.
Step 703, portable terminal are that destination address sends the signaling between portable terminal and CAP with source CAP, for example use the RSVP signaling to carry out the renewal of TFT, or transmission mobile IPv 4 registration message, if portable terminal has carried out repeatedly switching between CAP, then this destination address is the CAP address, source before switching for the first time.Whether target CAP receives the destination address of judging this signaling in the back is source CAP, if then execution in step 704; Otherwise directly abandon or reply refuse information, in refuse information, can indicate the service IAD to change.
Step 705, target P DSN reply portable terminal according to result, and indication is processed into merit or handles failure in replying signaling.
The source address of replying signaling can be set to CAP address, source, if carried out repeatedly switching between CAP, then is the CAP address, source before switching for the first time, perhaps is set to the address of target CAP self.
In step 703, target CAP can not judge the destination address of signaling yet, promptly carries out subsequently processing as long as this signaling is a Resv signaling between portable terminal and CAP, like this, can transmit the address information of source CAP in the step 701.
Further, after all active session all finished on the portable terminal, target CAP can give portable terminal with the address notification of self, and advice method has following several:
1) target CAP is by the address of space interface signaling notice portable terminal self.
2) target CAP can send the address of Router Advertisement message informing portable terminal self.
3) if portable terminal is supported mobile IPv 4, target P DSN can send the address of AgentAdvertisement message informing portable terminal oneself.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the communication means of portable terminal and IAD is characterized in that, comprising:
Portable terminal carries out switching between IAD, and successfully carries out context transfer, and target access gateway becomes the service IAD;
Described target access gateway receives the signaling that described portable terminal sends to source access gateway, and according to described contextual information this signaling is handled.
2. the communication means of portable terminal according to claim 1 and IAD, it is characterized in that, when described contextual information shifted, the IAD before switching sent to target access gateway with the address of source access gateway, and described target access gateway obtains this address and preserves.
3. the communication means of portable terminal according to claim 1 and 2 and IAD, it is characterized in that, described portable terminal is before switching to target access gateway, switching between IAD has at least once taken place, and the IAD of then described portable terminal before switching for the first time takes place is source access gateway.
4. the communication means of portable terminal according to claim 1 and IAD is characterized in that, described target access gateway also comprises after signaling is handled: described target access gateway is replied to portable terminal described signaling according to result.
5. the communication means of portable terminal according to claim 4 and IAD, it is characterized in that the source address of the signaling that described target access gateway is replied is the destination address of the described portable terminal signaling that sends to source access gateway or the address of target access gateway self.
6. the communication means of portable terminal according to claim 1 and IAD is characterized in that, this method also further comprises, described target access gateway is given portable terminal with self address notification.
7. the communication means of portable terminal according to claim 6 and IAD is characterized in that, described target access gateway is to the method for portable terminal self address notification: send the IP configuration request message of carrying self address to portable terminal.
8. the communication means of portable terminal according to claim 6 and IAD, it is characterized in that described target access gateway is to the method for portable terminal self address notification: manufacturer's Extended Protocol message of replying the peer-peer protocol that carries self address to portable terminal.
9. the communication means of portable terminal according to claim 6 and IAD, it is characterized in that, described target access gateway is to the method for portable terminal self address notification: the session updates message that will carry self address by the A11 interface sends to the targeted packets controlled function, described targeted packets controlled function is given target access network with described address notification, and described target access network utilizes space interface signaling with described address notification portable terminal.
10. the communication means of portable terminal according to claim 6 and IAD, it is characterized in that described target access gateway is to the method for portable terminal self address notification: carry the address of self by reply router advertisement message or proxy announcement message to portable terminal.
11. the communication means of portable terminal according to claim 6 and IAD is characterized in that, described target access gateway is to the method for portable terminal self address notification: the address of carrying self by space interface signaling.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101152774A CN101128042A (en) | 2006-08-15 | 2006-08-15 | Communication method for mobile terminal and access gateway |
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| CNA2006101152774A CN101128042A (en) | 2006-08-15 | 2006-08-15 | Communication method for mobile terminal and access gateway |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387469A (en) * | 2010-08-30 | 2012-03-21 | 株式会社日立制作所 | Mobile access network gateway, multicast quick switching system and multicast quick switching method |
| CN111756592A (en) * | 2019-03-28 | 2020-10-09 | 中国移动通信有限公司研究院 | Policy processing method and entity |
-
2006
- 2006-08-15 CN CNA2006101152774A patent/CN101128042A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387469A (en) * | 2010-08-30 | 2012-03-21 | 株式会社日立制作所 | Mobile access network gateway, multicast quick switching system and multicast quick switching method |
| CN102387469B (en) * | 2010-08-30 | 2014-07-09 | 株式会社日立制作所 | Mobile access network gateway, multicast quick switching system and multicast quick switching method |
| CN111756592A (en) * | 2019-03-28 | 2020-10-09 | 中国移动通信有限公司研究院 | Policy processing method and entity |
| CN111756592B (en) * | 2019-03-28 | 2022-03-08 | 中国移动通信有限公司研究院 | Policy processing method and entity |
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Application publication date: 20080220 |