CN101558675A - Method and apparatus for preparing connection transfer between an IP based communication system (LTE/SAE) and a PDP context based communication system (UMTS/GPRS) - Google Patents
Method and apparatus for preparing connection transfer between an IP based communication system (LTE/SAE) and a PDP context based communication system (UMTS/GPRS) Download PDFInfo
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Abstract
In a method and apparatus for providing system interoperability in wireless communications an IP based client-server application maintains a proper set of PDP contexts while a mobile is connected via an IP based system such as LTE/SAE. The application client resides in the mobile and the server resides within the network at a common anchor point (115) between the IP based system (103), and a PDP context based system (111). The PDP contexts are kept up to date but on hold until a handover occurs for the mobile from the IP based system (111).
Description
The cross reference of related application
The application requires to enjoy the U.S. Provisional Application No.60/848 that the name of submitting on September 29th, 2006 is called " METHOD ANDAPPARATUS FOR SYSTEM INTEROPERABILITY IN WIRELESSCOMMUNICATIONS ", 216 priority.Incorporate the full content of this application into this paper by reference.
Technical field
The present invention relates generally to wireless communication field, relate more specifically to the interoperability of system in the radio communication.
Background technology
Wireless communication system is widely in order to various types of Content of Communication to be provided, such as voice, data etc.These systems can support the multi-address system that communicates with a plurality of users by sharing free system resources (for example, bandwidth and transmitting power).The example of this multi-address system comprises code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system, 3GPP Long Term Evolution (3GPP LTE) system and OFDM (OFDMA) system.
Usually, wireless multiple-access communication system can be supported the communication of a plurality of wireless terminals simultaneously.Each terminal communicates via the transmission on forward link and the reverse link and one or more base station.Forward link (perhaps down link) is meant the communication link from the base station to the terminal, and reverse link (perhaps up link) is meant the communication link from terminal to base station.This communication link can be set up via the single output of single input, the single output of many inputs or multiple-input and multiple-output (MIMO) system.
In order to realize new, more advanced Technology Need upgrading communication network, this normally a kind of pressure.Yet this often relates to the compatibling problem between the agreement of using between a large amount of investments and equipment and the related different entities.Therefore, always exist a kind of for the demand that helps at the method and apparatus that communicates between these entities.
Summary of the invention
Provided the brief overview of one or more aspects below so that basic comprehension to these aspects is provided.This general introduction is not the extensive overview to all contemplated aspects, and is intended to neither point out the key or the important element of all aspects, does not limit arbitrarily or the scope of all aspects yet.Its purpose only is some notions that provide one or more aspects in simplified form, the preorder of more specifically describing that is used as providing later.
According on the one hand, a kind of method that is used for the interoperability of system of communication network comprises: set up the relevant contextual information of activity with the interior mobile radio station of first communication system, wherein said first communication system is not based on contextual system; It is up-to-date that described contextual information is updated to; When being connected to first communication system, this mobile radio station keeps described contextual information; And when this mobile radio station switches to the second communication system, described contextual information is come into operation, wherein said second communication system is based on contextual communication system.
On the other hand, a kind of device that is used for the interoperability of system of communication network comprises: be used to set up the module of the contextual information relevant with the activity of mobile radio station in first communication system, wherein said first communication system is not based on contextual system; Be used to make described contextual information to be updated to up-to-date module; Be used for when this mobile radio station is connected to first communication system, keeping the module of described contextual information; And being used for the module that when this mobile radio station switches to the second communication system, described contextual information come into operation, wherein said second communication system is based on contextual communication system.
In order to address relevant purpose before realizing, one or more aspects comprise the feature of after this describing and particularly pointing out in the claims comprehensively.The following description and drawings have specifically provided some exemplary aspect of one or more aspects.But the sub-fraction in the variety of way of principle of various aspects has only been pointed out to use in these aspects, and described aspect is intended to comprise all these aspects and equivalents thereof.
Description of drawings
Fig. 1 shows the exemplary embodiment that network according to the present invention is connected with subscriber equipment;
Fig. 2 shows the exemplary embodiment of the non-roaming structure of IP-based SAE system; And
Fig. 3 shows the exemplary embodiment of the roaming structure of IP-based SAE system.
Embodiment
Describe various embodiment referring now to accompanying drawing, wherein use identical reference number to come to refer in full components identical.In the following description, for illustrative purposes, a large amount of details have been provided so that complete understanding to one or more embodiment is provided.Yet apparent, these embodiment can implement under the situation of these details not having.In other example, show known configurations and equipment so that help to describe these embodiment with the block diagram form.
Technology described herein can be used for various cordless communication networks, such as code division multiple access (CDMA) network, time division multiple access (TDMA) network, frequency division multiple access (FDMA) network, quadrature FDMA (OFDMA) network, Single Carrier Frequency Division Multiple Access (SC-FDMA) network etc.Term " network " and " system " often exchange and use.Cdma network can be realized the radiotechnics such as general land wireless access (UTRA), cdma2000 etc.UTRA comprises broadband-CDMA (W-CDMA) and low-chip rate (LCR).Cdma2000 is contained IS-2000, IS-95 and IS-856 standard.The TDMA network can be realized the radiotechnics such as global system for mobile communications (GSM).GPRS (GPRS) is the technology that is designed for the GSM network.The OFDMA network can realize such as evolution UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20,
Etc. radiotechnics.UTRA, E-UTRA and GSM are the parts of Universal Mobile Telecommunications System (UMTS).Long Term Evolution (LTE) is the UMTS version that is about to the use E-UTRA of issue.UTRA, E-UTRA, GSM, UMTS and LTE are described in the document from by name " the 3rd generation partner program " tissue (3GPP).Cdma2000 is described in the document from by name " the 3rd generation partner program 2 " tissue (3GPP2).These various radiotechnicss and standard are well known in the art.
In an embodiment, the purpose of method and apparatus described herein is to provide compatibility using the contextual system of packet data protocol (PDP) and do not use between the system based on Internet Protocol (IP) of PDP Context.A kind of use example is to support between the contextual system to take over seamlessly or conversation continuity in IP-based system with based on PDI.
Above-mentioned IP-based system can be 3GPP system architecture evolution (SAE) system, evolution 3GPP2 system, Wimax system, Flash-OFDM system, Flarion system, IEEE system or any other not based on the system of PDP Context.
Above-mentioned system based on PDP Context can be that gprs system, UMTS packet switching system, GERAN system or any other utilize the system of PDP Context.
For clarity sake, come some aspect of description technique at 3GPP SAE system and gprs system below, and used the term of SAE and GPRS in below most of, describing.
Use the example of term PDP Context as the concrete carrying in the system.Except that the system based on PDP Context, the basic thought of this paper can also be used for the system based on other carrying, such as connecting, carry based on peer-peer protocol (PPP) or any other layer 2 or layer 3 system of carrying.
Term GPRS type system is applicable to any system of transmitting based on carrying by access interface.
Terms user equipment (UE), travelling carriage, mobile device etc. refer to the end user device that is used to insert at least one said system.Can insert by radio, wireless or wireline interface.
In one embodiment, the problem that solve is to be supported in based on switching between the system of PDP and the rapid system between the IP-based system.Do not having under the situation of concrete configuration, can take the too many time and can not realize smooth change between system to such an extent as to after the system that switches to based on PDP, set up PDP Context.Its reason is that when travelling carriage connected via IP-based system, it was up-to-date that PDP information or any other beared information do not have local update.Here the concrete configuration that proposes is described below.
Below describe and use the example of IP-based 3GPP SAE, but this description is applicable to that also 3GPP2 system, Wimax, Flash OFDM, IEEE system or any other of evolution do not have the system of PDP Context as IP-based system.As the system based on the example of the system of PDP Context is the 3GPP gprs system, but should describe applicable to any other based on the carrying system for transmitting.
In one embodiment, even be when connecting, also to safeguard PDP Context on the one hand via IP-based system.Set up and manage PDP Context by transparent tunnel through IP-based system, make that the core net node place of PDP Context information in mobile device place and system is all available, so that be provided to taking over seamlessly of system (as GPRS) based on PDP Context.
Referring now to Fig. 1, on the one hand, when connecting subscriber equipment (UE) 101 or travelling carriage via IP tunnel 102 by IP-based system 103, one group of suitable substance P DP of IP-based client-server applicating maintenance context.Applications client 105 is positioned at travelling carriage 101 places, and application server 107 is positioned at the inherent IP-based system of network and based on the system 111 of PDP Context (for example, public anchor point 109 places between GPRS).One group of service that this application monitors travelling carriage uses via IP-based system, and foundation is carried the required PDP Context of the identical service of this group by gprs system.These PDP Contexts all are updated to up-to-date at travelling carriage and webserver place, but keep these PDP Contexts on the other hand.When needs switch to GPRS, PDP Context is moved to the PDP Context end point: mobility protocol stack, in " standby SGSN (standby the SGSN) " function 113 at IP-based system place and in the GGSN at IP-based system place (Gateway GPRS Support Node) terminal (GGSN Termination) 115.For gprs system, " standby SGSN " functional simulation tradition SGSN (Serving GPRS Support Node), being used for according to process between the SGSN of 3GPP authority file TS 23.060, and GGSN terminal simulation tradition GGSN.
Use GPRS Tunnel Protocol (GTP) to communicate by letter with " the GGSN terminal " at IP-based system place based on the SGSN in the network of PDP by standard gn interface (in Fig. 1, being depicted as GTP/Gn).
Use GTP to communicate by letter with " the standby SGSN " at IP-based system place based on the SGSN in the network of PDP by standard gp interface (in Fig. 1, being depicted as GTP/Gp).
No matter mobile device has used any service by IP-based system, all safeguards (maintenance) PDP Context that can support same one group of service at the UE place with at the node place of network side management PDP Context.When this group by IP-based system during service change, then (maintenance) PDP Context is carried out necessary modifications (if modification is arranged).IP-based system itself does not know at the travelling carriage place and the PDP Context of the maintenance that safeguard in the endpoint of a tunnel place in network.
Each element shown in Fig. 1 is more specifically described below.
The GGSN terminal: the intrasystem function that this is based on IP stops the connection via gprs system here.For GPRS, " GGSN terminal " effect is the conventional GGSN of gprs system.
Standby SGSN: this is based on the intrasystem function of IP, and it simulates the SGSN function of IP-based system.For GPRS, " standby SGSN " effect is the conventional SGSN of gprs system.
The PDP compliant applications: this is based on the application of IP, and it is used for when connecting travelling carriage via IP-based system PDP Context being managed.This application is included in UE place " PDP compatibility application client " (PCAC) with in " the PDP compatibility application server " at the IP-based system place signaling between (PCAS), so that be maintained in one group of suitable substance P DP context between UE and the system pellucidly, switch between contingent system helping.
When the UE maintenance connected by IP-based system, it was up-to-date just making the PDP Context information updating, and keeps this PDP Context information to be used for potential inter system change.
By carry out the communication between PCAS and the PCAC in exchange GPRS SM and MM kind of message on the IP tunnel between the client and server.Realize IP tunnel by IP-based SAE system.
PDP compatibility application server (PCAS): this is the server at IP-based system place, the PDP Context information of its supervising the network side.PCAS communicates by the PCAC at IP-based tunnel and UE place.PCAS also communicates with IP-based grid function " standby SGSN " and " GGSN terminal ", to keep these three entities synchronous.
PDP compatibility application client (PCAC): this is the client of UE side, and it safeguards PDP Context information when UE connects by IP-based system.When UE kept connecting by IP-based system, it was up-to-date just making the PDP Context information updating, and kept this PDP Context information to change between potential system being used for.When between system, changing, move this PDP Context information from the actual PDP Context end point of UE.
Switch to GPRS from IP-based system
When will initiating from IP-based system to the time based on the exchange of the system of PDP/switching, the actual PDP Context end point that will activate that will locate to travelling carriage (UE) from the PDP Context information reproduction of the maintenance of " PDP compatibility application client ".Equally, will be from the PDP Context information reproduction of " PDP compatibility application server " the actual PDP Context end point that will activate in the network (GGSN).Equally, (for example, GPRS), PDP Context information can be used in the position of similar SGSN (" standby SGSN ") for system based on PDP.
Between transfer period, if desired, communicate with " Back Up Source SGSN " based on the target SGSN in the system of PDP, just as it communicates with real source SGSN in switching in based on the system of PDP." GGSN terminal " in the IP-based system operates as the GGSN in the target gprs system.
Switch to IP-based system from GPRS
When travelling carriage connected by gprs system, this connection still came route by " the GGSN terminal " at IP-based system place.Based on the PDP Context of setting up for the user by gprs system, IP-based system can pre-established in this IP-based system/foundation pass through the ability of one group of same services of this IP-based system transmissions.This can comprise suitable IP qos policy distribution or prepare in the IP-based intrasystem suitable node.If necessary, can set up the tunnel that connects by GPRS, so that at the necessary IP-based context of UE place preparation/foundation.
Process when UE is in GPRS
Except the exception of discussing in the document, the UE of system and GPRS specific part should be according to operating at the gprs system defined.
Process when UE is in IP-based SAE
When UE was connected to system via IP-based SAE, the SAE transmission did not need PDP Context information.Yet PDP Context information must be updated to up-to-date, to be ready for the system (such as GPRS) that switches to based on PDP Context.In order to be up-to-date with the PDP Context information updating, PCAC and PCAS exchange application layer signaling, its content with for being that the up-to-date content of stipulating at GPRS between UE and SGSN is similar with the PDP Context information updating.
By replacing UE with PCAC and replace bottom GPRS transmission with IP tunnel by IP-based system, the information that can will exchange according to TS 23.060 acquisitions.
The PDP state storage and is used this PDP state in the time will switching or exchange to GPRS in the PCAC at UE place and in the PCAS at IP-based system place.
The PDP Context information at PCAS and PCAC place always should be remained on a kind of like this state, that is, the PDP Context of the same-type of the last existence of GPRS should be carried on and be moved to the one group of IP stream that transmits on the gprs system between possible system in the handover event.
Inter system procedures
IP-based system and based on the process between the system of GPRS and those similar process of in the GPRS standard of for example 3GPP TS23.060, describing.
About switching to gprs system from IP-based system, the process among the TS 23.060 should be described as follows:
● " original SGSN " represented by (in the SAE anchor point) " standby SGSN " function in the IP-based system.
● GGSN is represented by (in the SAE anchor point) " GGSN terminal " function in the IP-based system.
● the process in the gprs system of source is substituted by IP-based intrasystem suitable process.
About switching to IP-based system from the system based on GPRS, the process among the TS 23.060 should be described as follows:
● " new SGSN " represented by (in the SAE anchor point) " standby SGSN " function in the IP-based system.
● GGSN is represented by (in the SAE anchor point) " GGSN terminal " function in the IP-based system.
● the process in the target gprs system is substituted by IP-based intrasystem suitable process.
Referring now to Fig. 2 and Fig. 3, described exemplary block diagram among the figure.Fig. 2 shows the exemplary non-roaming structure of the IP-based SAE system that can use the above-mentioned type SAE-GPRS interoperability.In this example, PCAS is positioned at the SAE anchor point place of the block core (EPC) of evolution.Fig. 3 shows the exemplary roaming structure of the IP-based SAE system that can use the above-mentioned type SAE-GPRS interoperability.
It will be appreciated by those skilled in the art that and to use any in various method and the technology to come expression information and signal.For example, mentioned data, instruction, order, information, signal, bit, symbol and chip can be represented with voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or light particle or its any combination in above whole specification.
Those skilled in the art shall also be noted that in conjunction with the described various illustrative logical blocks of embodiment disclosed herein, module, circuit and algorithm steps and can be implemented as electronic hardware, computer software or both combinations.For this interchangeability of hardware and software clearly is described, in various exemplary components, square, module, circuit and step, its function has been carried out whole description.This function is embodied as software or is embodied as hardware and depends on concrete application and be added to design constraint on the whole system.Those skilled in the art can realize described function in every way at every kind of concrete application, but this realization judgement should not be interpreted as causing departing from the scope of the present invention.
Can utilize following parts to realize or carry out in conjunction with the described various illustrative logical blocks of embodiment disclosed herein, module and circuit: general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or be designed for any combination of these parts of carrying out function described here.General processor can be a microprocessor, but alternatively, processor can be any conventional processors, controller, microcontroller or state machine.Processor also can be implemented as the combination of computing equipment, and for example, the combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor are in conjunction with DSP nuclear or any other this configuration.
In the software module that can directly be included in the hardware, carry out by processor in conjunction with the step of described method of embodiment disclosed herein or algorithm or in the two the combination.Software module can be positioned at RAM memory, flash memories, ROM memory, eprom memory, eeprom memory, register, hard disk, removable dish, CD-ROM or any other storage medium form known in the art.Exemplary storage medium is coupled to processor, makes processor can from this storage medium, read information or to this storage medium writing information.As an alternative, described storage medium can be integral to the processor together.Processor and storage medium can be arranged in ASIC.ASIC can be arranged in user terminal.As an alternative, processor and storage medium can be used as discrete parts and are arranged in user terminal.
For making those of ordinary skills can realize or use the present invention, be described around the disclosed aspect of the present invention above.To those skilled in the art, be conspicuous to the various modifications of these aspects, and the general principles of the application's definition also can be applicable to others on the basis that does not break away from the present invention's spirit and protection range.Therefore, the present invention is not limited to these given aspects of the application, but consistent with the widest scope of disclosed principle of the application and novel features.
Claims (25)
1, a kind of method that is used for the interoperability of system of communication network comprises:
Set up the relevant contextual information of activity with the interior mobile radio station of first communication system, wherein said contextual information can be used in the second communication system but be incompatible with the context in described first communication system;
It is up-to-date that described contextual information is updated to;
When being connected to described first communication system, described mobile radio station keeps described contextual information; And
When described mobile radio station switches to described second communication system described contextual information is come into operation, wherein said second communication system is not based on and the identical context of described first communication system.
2, method according to claim 1, wherein, described first communication system is not based on contextual system.
3, method according to claim 2, wherein, described first communication system is based on the communication system of Internet Protocol (IP), and described second communication system is based on the contextual communication system of packet data protocol (PDP).
4, method according to claim 3, wherein, described IP-based communication system is system architecture evolution (SAE) communication system, and described communication system based on PDP Context is GPRS (GPRS) system.
5, method according to claim 1, wherein, described contextual information should be used for safeguarding by the client-server at the public anchor point place between described mobile radio station place and described first and second communication systems; And in the applications client at described mobile radio station place with between the application server at described public anchor point place, described contextual information is carried out tunnel transmission by described first communication system.
6, a kind of device that is used for the interoperability of system of communication network comprises:
Be used to set up the module of the contextual information relevant with the activity of mobile radio station in first communication system, wherein said contextual information can be used in the second communication system but be incompatible with the context in described first communication system;
Be used to make described contextual information to be updated to up-to-date module;
Be used for when described mobile radio station is connected to described first communication system, keeping the module of described contextual information; And
Be used for the module that when described mobile radio station switches to described second communication system described contextual information come into operation, wherein said second communication system is not based on and the identical context of described first communication system.
7, device according to claim 6, wherein, described first communication system is not based on contextual system.
8, device according to claim 7, wherein, described first communication system is based on the communication system of Internet Protocol (IP), and described second communication system is based on the contextual communication system of packet data protocol (PDP).
9, device according to claim 8, wherein, described IP-based communication system is system architecture evolution (SAE) communication system, and described communication system based on PDP Context is GPRS (GPRS) system.
10, device according to claim 6, wherein, described contextual information should be used for safeguarding by the client-server at the public anchor point place between described mobile radio station place and described first and second communication systems; And in the applications client at described mobile radio station place with between the application server at described public anchor point place, described contextual information is carried out tunnel transmission by described first communication system.
11, a kind of machine readable media that comprises instruction wherein, makes operation below the described machine execution when machine is carried out described instruction:
Set up the relevant contextual information of activity with the interior mobile radio station of first communication system, wherein said contextual information can be used in the second communication system but be incompatible with the context in described first communication system;
It is up-to-date that described contextual information is updated to;
When being connected to described first communication system, described mobile radio station keeps described contextual information; And
When described mobile radio station switches to described second communication system described contextual information is come into operation, wherein said second communication system is not based on and the identical context of described first communication system.
12, machine readable media according to claim 11, wherein, described first communication system is not based on contextual system.
13, machine readable media according to claim 11, wherein, described first communication system is based on the communication system of Internet Protocol (IP), and described second communication system is based on the contextual communication system of packet data protocol (PDP).
14, machine readable media according to claim 11, wherein, described IP-based communication system is system architecture evolution (SAE) communication system, and described communication system based on PDP Context is GPRS (GPRS) system.
15, machine readable media according to claim 11, wherein, described contextual information should be used for safeguarding by the client-server at the public anchor point place between described mobile radio station place and described first and second communication systems; And in the applications client at described mobile radio station place with between the application server at described public anchor point place, described contextual information is carried out tunnel transmission by described first communication system.
16, a kind of mobile radio station that operates in the wireless communication system, described mobile radio station comprises:
Processor is used for:
Set up the relevant contextual information of activity with the interior mobile radio station of first communication system, wherein
Described first communication system is not based on contextual system;
It is up-to-date that described contextual information is updated to;
When being connected to described first communication system, described mobile radio station keeps described contextual information;
And
When described mobile radio station switches to the second communication system described contextual information is come into operation, wherein said second communication system is based on contextual communication system; And memory, be coupled to described processor to be used to store data.
17, mobile radio station according to claim 16, wherein, described first communication system is based on the communication system of Internet Protocol (IP), and described second communication system is based on the contextual communication system of packet data protocol (PDP).
18, mobile radio station according to claim 16, wherein, described IP-based communication system is system architecture evolution (SAE) communication system, and described communication system based on PDP Context is GPRS (GPRS) system.
19, mobile radio station according to claim 16, wherein, described contextual information should be used for safeguarding by the client-server at the public anchor point place between described mobile radio station place and described first and second communication systems.
20, mobile radio station according to claim 16, wherein, in the applications client at described mobile radio station place with between the application server at described public anchor point place, described contextual information is carried out tunnel transmission by described first communication system.
21, a kind of public anchor point that is used for interoperability of system in the wireless communication system that operates in, described public anchor point comprises:
Be used to set up the module of the contextual information relevant with the activity of mobile radio station in first communication system, wherein said first communication system is not based on contextual system;
Be used to make described contextual information to be updated to up-to-date module;
Be used for when described mobile radio station is connected to described first communication system, keeping the module of described contextual information; And
Be used for the module that when described mobile radio station switches to the second communication system described contextual information come into operation, wherein said second communication system is based on contextual communication system.
22, public anchor point according to claim 21 also comprises:
Packet data protocol (PDP) compatibility application server (PCAS) module;
Standby SGSN functional module; And
GGSN termination function module.
23, public anchor point according to claim 22, wherein, described PCAS communicates with PDP compatibility application client (PCAC) module that is arranged in mobile radio station by the IP tunnel via IP-based network.
24, public anchor point according to claim 23, wherein, described PCAS and described standby SGSN functional module and described GGSN termination function module communicate.
25, public anchor point according to claim 24, wherein, described standby SGSN functional module and described GGSN termination function module simulation tradition SGSN and GGSN node, and use traditional GPRS Tunnel Protocol and communicate based on the Serving GPRS Support Node in the network of PDP by legacy interface.
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| CN201510455326.8A CN105072651B (en) | 2006-09-29 | 2007-10-01 | For providing the method and apparatus of interoperability of system in wireless communications |
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| US84821606P | 2006-09-29 | 2006-09-29 | |
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| US11/863,944 | 2007-09-28 |
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