CN100596083C

CN100596083C - Heterogeneous network system and mobile host

Info

Publication number: CN100596083C
Application number: CN200580007800A
Authority: CN
Inventors: R·萨尔米宁
Original assignee: Seesta Oy AB
Current assignee: Seesta Oy AB
Priority date: 2004-03-10
Filing date: 2005-03-10
Publication date: 2010-03-24
Anticipated expiration: 2025-03-10
Also published as: FI20040378A0; CN1977495A

Abstract

The invention relates to a system that dynamically integrates a set of communication networks to increase the overall heterogeneous network system performance and capabilities. In particular, the present invention relates to a technique of providing a Dynamic Heterogeneous Network System, and providing a Network Node entity and a Mobile Host entity into the system to support the heterogeneous network. The network system according to the present invention has an architecture that includes at least five building blocks including a mobile host (1), an access network (7), a network node (2), an AAA (Authentication, Authorization and Accounting) node (13), and an external network (3).

Description

Heterogeneous network system and mobile host

Technical field

The present invention relates to a kind ofly be used for dynamic integrity one group communication network so that increase the performance of whole heterogeneous network system and the system of ability.The invention particularly relates to a kind of technology that is used to provide dynamic heterogeneous network system, and be used for network node entity and mobile host entity be provided to described system so that support as the technology of heterogeneous network of the present invention.

Background technology

The interest group of--make the number of employed each network technology minimizes in market--although worldwide there are many common objectives that have, however today and foreseeable future exist many can be local and the wired and wireless system of global standardsization and use.

Its root of some network technologies can be traced back to long ago, and they use these years between obtained improvement amount quite widely and optimization activity, and some technology still is in the commitment of its life cycle, and may be based on using very complicated new method to satisfy requirement to they provided

More above-mentioned new methods may be able to not realize in commercial product, up to new development occurs in for example circuit engineering and processing platform ability.

Thereby the difference of diverse network technology on requiring also has very dark influence to the attempt degree of wanting the system that how to realize--in fact some systems have been developed in the world everywhere to surpass that 99.999% time availability requires and tens thousand of bps data throughput operation, and some aimss of systems be to have very low-cost and low-power consumption requirement and even the individual little coverage of the data throughput of hundreds of mbit/in operate, all the other systems are between these two kinds of extreme cases.Some systems also optimize for the circuit-switched service of reasonable sound formula, and some systems are for to optimize as the packet switching service of internet browsing, computer networking and Email formula.

Above-mentioned deployment conditions is difficult to the fact of estimation in advance in conjunction with the running cost structure of the per generation International standardization cellular system of the exploitation holonomic system complicated more and expensive and more of new generation than its predecessor, in this area more and more the expert seeking the material standed for of the holonomic system that is used to develop new per generation system.A kind ofly may existing and new network technology will be used together, this is the trend in 4G research and the standardization effort, and make holonomic system under specific service conditions, coordinate to use every kind of optimal part of available techniques, and obtain economical and technical integration whereby.The present invention adopts this method exactly.

Current prior art is to have multiple access technology, comprise that wired and wireless, wireless example is that the example of cellular system (NMT, GSM, AMPS, CDMA, PDC, GPRS, EDGE, WCDMA, CDMA-2000, Inmarsat) and Radio Network System is to be used for the standard (WPAN, WLAN, WMAN, WBMA, UWB, Bluetooth, ZigBee, infrared) that the service of limited geographic area covers purpose.Have several access technologies that are used for wired visit, example is ADSL, SDSL, VDSL, the system based on cable TV, the system based on modulator-demodulator via pay station line, HomePNA, FTTH.Also exist several effort to use different technology that various system in combination based on honeycomb fashion and local zone are in the same place.The common ground of these methods is that they rely on executive system internetwork roaming even inter-system handover (being also referred to as vertical handing-over) to come according to optimal mode service-user.In publication application US 2003/0048762A1, US2003/0048773A1, US 2003/0050061A1 and patent (JP) 2001-272660,2001-272661,2001-317471, FA method in this field has been described, wherein, seamlessly make up a plurality of wireless communication systems by using independently basic Access Network together and use the SDR technology to make the mobile host can usage level and vertically join and communicate by letter one at a time substantially with different wireless systems each system integration.In document MIRAI architecture also known in above-mentioned patent defined system.As is known in the art, be people such as Schultzrinne about in heterogeneous network, using the valuable reading matter of IETF session initiation protocol (SIP): ' Multimedia SIP sessions in a Mobile HeterogeneousAccess Environment '.S.Mangold is at its paper: ' put down in writing the comprehensive study aspect the 802.11e service quality among the Analysis of IEEE802.11e and Application of game Models for support ofQuality-of-Service in Coexisting Wireless Networks '.Clearly be to those skilled in the art, the comprehensive description that provides this prior art on a large scale under the telecommunications historical development trend before not considering is difficult, if particularly must be described briefly.Select above listed document to come to provide very simple guide to the reader.

Summary of the invention

The present invention can carry out different types of communication simultaneously via the access technology (wireless or wired) of arbitrary number, and can dynamically reconfigure connection so that support the desired seeervice level of user when needs.For initial calling party, use existing mobile management and authentication and authorization function in the Access Network known in the prior art, thereby needn't construct expensive independent Access Network separately for this reason.The notion that mobile host still stacks up the several mobile host component entity with various abilities, and described entity each other between communication respectively.Handing-over that the present invention has also avoided (being also referred to as vertical) between network, this is because this handing-over is very expensive and is difficult to exploitation, test and enough uses reliably, and the present invention depends on common connection foundation and releasing mechanism, and has only when the execution network is reconfigured and just notify the user to use.Described process also comprises other necessary preparation of being carried out when the subscriber brings into use resource in the objective network, such as using in the network of being discussed employed authentication mechanism to authenticate subscriber in the described network.

In a single day mobile host has the access rights in the heterogeneous network, be used for master control entity exactly in the professional route of described heterogeneous network, the method has several benefits compared with prior art, in described heterogeneous network, realized more concentrated communication service control, promptly judge, and thereby can realize saving via the signaling of band-limited access interface and make the delay of response time littler near (again) that be used to that what is indicated as and how carry out connecting the information source of (again) configuration activities configuration.After also showing, the research of the development trend of circuit engineering and disposal ability and the Digital Signal Processing of radio signal having on the market from strength to strength and more senior portable system on the function, and in this scheme, more processing responsibilities relevant with network control are moved on to more to approach the network leaf be the outgrowth direction.Making another main benefit of the professional route in the mobile host control heterogeneous network is to increase the overall durability of holonomic system significantly, this be since Access Network in most of the cases be overlapping and in the present invention the visible down-time period of end user may need in system, occur several serious problems usually simultaneously and just can occur obviously reduced the possibility of this situation because different types of method is compared with the network of prior art.

Owing to be the center of action during the degradation of mobile host when detecting actual connections in, move so can start recovery immediately, this is an important factors in the durability of increase whole system and when duration of the degradation of being discussed is minimized.The possibility that mobile host has also increased development system is shifted in more controls censures heterogeneous network in architecture of the present invention, needn't store the data relevant therein so that relate to the network node of professional route in the heterogeneous network, and will store at the prior art network with permanent subscriber.In relating to the network node of professional route, lack the data relevant and be easy to network installation and operation significantly with the subscriber.

A benefit of the present invention is to use modular system as much as possible, and makes and need interpolation or the change that they carry out be minimized.This strengthens competition and makes the installation of holonomic system and operate more cheap.

The present invention is characterized by the content of independent claims.

Description of drawings

Hereinafter provided description of drawings.

Fig. 1 is the explanatory system assumption diagram how heterogeneous network constitutes single Access Network and how to connect mobile host, Access Network, network node and external network in described heterogeneous network.

Fig. 2 is the key-drawing of the internal architecture of mobile host.

Fig. 3 be how via heterogeneous network the explanatory system assumption diagram of mobile host and network node interconnection.Also show to external network and being connected to AAA (authentication, mandate and record keeping) node.

Fig. 4 is the key-drawing of the internal architecture of network node.

Fig. 5 is the architecture key-drawing of interface between entity in network node and the mobile host.

Fig. 6 is the message sequence chart that process is set up in the session that is used to illustrate network startup, independently connects on the Access Network territory at two in this example.

Fig. 7 is the continuity of sequence among Fig. 6.

Fig. 8 is the message sequence chart that is used for describing in more detail the subclass of Fig. 6, and the pdp context activation that uses GPRS network to start in this example is set up the initial connection to mobile host.

Fig. 9 is used for being illustrated in the message sequence chart that process is set up in session that the heterogeneous network mobile host starts.In this example in mobile host the user identity in known in advance each Access Network territory.

Figure 10 is used for the give an example mobile host of wireless access network and the message sequence chart of access point; Described in this case access point is the 802.11x WLAN AP that supports as QoS mechanism principle specified among the 802.11e of institute.

Figure 11 is the graphical presentation of signaling details on the physical radio interfaces described in Figure 10.

Figure 12 is the control in mobile host and the architecture general survey of the data structure in the measurement data library facility.

Figure 13 is used for illustrating the message sequence chart that the existing connection of Access Network is re-routed the process example in another Access Network that starts by the service quality that detects degradation.

The mark of entity is as follows in the accompanying drawing: 1 mobile host, 2 network nodes, 3 external networks, 4 mobile host parts X, 5 mobile host parts Y, interface between 6 mobile host parts X and the Y, 7 Access Networks, the capable Access Network of communication with it of A-C mobile host parts X, the access interface of the previous network of a-c, the capable Access Network of communication with it of D-G mobile host parts Y, the access interface of the previous network of d-g, control logic function in 8 mobile hosts, professional routing function in 9 mobile hosts, control in 10 mobile hosts and measured database, 11 use the application of the communication service of heterogeneous network, the access point of 12 single Access Networks (and base station or wired visit), the AAA-authentication of 13 heterogeneous networks, authorize and the record keeping node AAA-authentication in 14 network nodes, authorize and the record keeping interface function control logic function in 15 network nodes, professional routing function in 16 network nodes, 17 session initiation protocols (Session Initiation Protocol SIP) INVITE, 18 are used to ask aaa protocol (DIAMETER) inquiry of user's signing messages, and 19SIP indicates (SIP:100 trial), 20 pairs 18 aaa protocol (DIAMETER) response, process is set up in the initial connection of the mobile host in 21 to Access Networks, is connected with described mobile host in described Access Network, and 22 are used for registering at an Access Network, the process that AAA and user identity distribute, mobile host starts communication session whereby, the message of the user identity that 23 are included in 22 is distributed, 24SIP indicates (SIP:180 circulation), 25 processes identical with 22, but be used for another Access Network territory, the message of the user identity that 26 are included in 25 is distributed, 28SIP indicates (SIP:200OK), and 29SIP confirms (SIP:ACK), set up the process of media session between 30 each user identity that externally in 22 and 25, is distributed in network and the mobile host, because the details of this process is not related to the present invention, so do not illustrate in greater detail the details of this process, 31SIP end message (SIP:BYE), 33 Gateway GPRS Support Nodes (GGSN), 34 original location registers (Home Location Register HLR), 35 Serving GPRS Support Nodes (SGSN), 36 packet data protocols (packet data protocol PDP) PDU message, 37 MAPs (Mobile Application Part MAP) that are used for GPRS send routing iinformation (Send Routing Information SRI) message, 38 are used for 37 affirmation message, 39PDU notification request message, 40PDU push-notification-answer message, 41 request PDP context activation message, 42PDP context activation process, 43 set up (PAN) connection procedure, 44 processes that are used to scan available Access Network and obtain their identity, 45 comprise the message of available Access Network information, the QoS characteristic of described Access Network and control information are with relevant from the obtained specific Access Network of mobile host control and measured database, and 46 comprise the Access Network candidate list, the QoS contract of each Access Network, the message of the authentication information of each Access Network, 47 use the information received in 46 to carry out mobile host prepares so that roam into (subscriber in all Access Networks as described authenticates) in the Access Network and obtain identity such as the IP address and the process of the described QoS information that is connected, 48 comprise user identity, the QoS information that connects and in the message of mobile host from the obtained control data of control and measured database, 49 SIP INVITE branch to user identity, and 50 activate the PDP Context request message, and 51 create the PDP Context request message, 52 create the PDP Context response message, 53 activate PDP Context accepts message, 54802.11x access point (AccessPoint AP), and 55 comprise the 802.11MAC management activities information A DDTS QoS action request message of the QoS solicited message of Business Stream, the process that 56 users are authorized to and the QoS request is just analyzed, 57802.11MAC management activities information A DDTS QoS action response QoS provide information, if the new traffic flow assignment sequence when 58 57 the response codes of being advised are changed into the Business Stream of being attempted and created, 59 process that connect, QoS control and metrical information are consulted between mobile host parts Y5 and

access point

54,60 are included in CAP QoS (+) the CF poll of the QoS measurement result that AP 54 ends finish, and 61 store the results from 60 in control and the measured database 10 into, and 62 are used to QoS (+) CF-ACK from the QoS of mobile host parts Y 5 measurement, 63AP 5) handle 63 information, the example process that 64 periodicity QoS in the 802.11e that supports 802.11x WLAN environment consult, 65 target beacon transmit times (Target Beacon TransmissionTime TBTT), 66 beacons, 67QoS (+) CF-poll, 68 requests send (Request tosend RTS), 69 clears to send (CTS), 70 data (MSDU), 71 data (ACK), the 72CF end, 73 contention free periods (Contention Free Period CFP), 74 contention (CP), the access network technology that 75-82 is different, different Access Network territory (for example Virtual network operator) in the 83 single access network technologies, the data record of 84 1 Access Network examples, the data record of 85 the highest QoS service class, the data record of 86 higher QoS service class, the data record of QoS service class in the middle of 87, the data record of 88 low QoS service class, 89 are detected as the QoS of the connection that does not meet the demands, 90 are used to show the message that re-routes about connecting, and 91 are used for removing the connection of QoS degradation and discharge resource and upgrade the control of mobile host in view of the above and the process of measured database.

Embodiment

Preferred embodiment has below been described.

For the purpose of being explained above realizing, the present invention uses following means:

In the heterogeneous network system of integrated communication system, common network node, described common network node is supported a plurality of Access Networks and is come executive communication business function and authentication, mandate and accounting feature with the mobile host cooperation.

Heterogeneous network system can be roamed mobile host simultaneously in a plurality of Access Networks, described system uses existing mobile management of Access Network and authenticated/authorized function to locate the mobile host of roaming and set up initial communication between network node and mobile host.

Mobile host has the ability to communicate by letter simultaneously via a plurality of Access Networks, and described Access Network can be made up of wired and wireless access network.

The initial communication that utilization is set up between network node and mobile host is carried out the authentication and authorization to subscriber in the heterogeneous network, and sets up a plurality of connections simultaneously that stride across a plurality of Access Networks.In each Access Network, according to authenticating and authorize mobile host, and be assigned with and be stored in the described mobile host and when starting session by the employed identity such as the IP address of the mobile host in each Access Network and transmit from the information that network node received.The actual initialization of setting up institute's queued session is based on the authorization message of subscriber in the quality of service requirement of connection, the heterogeneous network and institute's control information stored in mobile host.

The service quality that is connected monitors by mobile host and couterparty (counter partying) access network entity, and information can be used for being connected setting, discharging and reconfiguring decision network according to measurement in the mobile host and measurement in the couterparty access network entity and is converted to objective network from source network in mobile host.Service quality is by mobile host and couterparty access network entity local measurement, and end-to-end quality of service should be used for measuring by the user.In judgement, use local service quality to measure the connection of during communication service, carrying out in the heterogeneous network to reconfigure.End-to-end quality of service is observed according to should being used for and is worked.

Service quality is used as data throughout, delay, shake, packet error probability and packet loss rate and measures.The quality of service requirement that connects is the subclass of these measurements, adds the service priority classification of connection.

Connecting the characteristic that reconfigures will use connection to set up and remove mechanism when via the candidate's route in the objective network rerouting is carried out in specific connection during operation.This has eliminated the needs of creating complicated handing-over mechanism between many access network technologies, can also use described principle to carry out the preparation of other necessity, such as utilizing in objective network employed mechanism to authenticate subscriber in the described network according to simple and controllable mode.Should re-route to applicative notifications, they can carry out suitable corrective action so if necessary.

Heterogeneous network system depends in Access Network to be carried out laterally handing-over and not to need the heterogeneous network layer to participate in described process, as long as for example satisfy the words of quality of service requirement.

Explain embodiments of the invention below with reference to accompanying drawing.

Notice that the access technology in the accompanying drawing is wireless, and within the scope of the invention, also can be according to using wire access technology with any combination of wireless access technology.

Figure 1 illustrates the architecture relation between the entity in heterogeneous network.As seen in Figure 1, mobile host 1 is communicated by letter with a plurality of Access Networks 7, A-G, the a-g that are connected to network node 2 and external network 3.Since the technical problem of drawing, and only Access Network A and G are directly connected to external network 3, however in the present invention, can be directly connected to external network 3 to the Access Network 7 of arbitrary number.

In Fig. 1, mobile host 1 is by two mobile host parts: mobile host parts X4 and mobile host parts Y5 form.The present invention does not limit the number of described parts with any means--it is characterized in that supporting the sum of the access technology supported by heterogeneous network; It/they only need to support the function of heterogeneous network architecture.As an example, mobile host parts X4 can be the multiband mobile phone parts with abilities such as GSM/GPRS/EDGE/UMTS, and mobile host parts Y5 can be the terminal that is equipped with abilities such as multiple WLAN/WMAN/WBMA/UWB, and the interface between mobile host parts 6 for example can be wired, infrared, bluetooth, ZigBee or device interior interface.The distribution of mobile host function of the present invention is not limited to the mobile host examples of components of the mobile host of above-mentioned complexity, and it can also partially or even wholly be distributed to any other suitable platform.

Fig. 2 shows the internal architecture of mobile host.The service of heterogeneous network provides the user to use 11 by access control logic function 8 and by access service routing function 9.Control logic function 8 main being responsible for are set up, are removed and reconfigure the connection in the heterogeneous network, and professional routing function 9 is responsible for coming the professional pay(useful) load of actual routing to communicate according to the order of control logic function 8.Control and measured database 10 utilize Control Parameter and service quality measurements to help control logic function 8 and professional routing function 9.Mobile host component entity X and Y (note, here their expression interfaces and be not physical unit) communicate to Access Network A-C, D-G.Media access control layer in the Access Network is guaranteed the service quality that connects, and carries out qos measurement.Then measurement result is stored in control and the measured database 10.

Fig. 3 shows the architecture general survey how how mobile host 1 be connected to external network 3 and AAA (authentication, authorize and keep accounts) node 13 via single Access Network 7 and access point thereof or base station or wired visit 12 and network node 2 communications and described network node 2.Single Access Network 7 also can be directly connected to external network 3.

Fig. 4 shows the internal architecture of network node 2.AAA node 13 uses aaa protocol interface function 14 to communicate by letter with control logic function 15.The control logic function is communicated by letter with professional routing function 16 with external network 3, and described professional routing function 16 is connected to described external network 3 and Access Network 7.

Fig. 5 shows control logic function, the control logic function in the network node 15 and the communication interface between the aaa protocol interface function in the network node 14 in mobile host 8.

Fig. 6 and Fig. 7 show the message sequence chart that process is set up in heterogeneous network network startup session.In this example, IETF agreement use such as SIP, the SDP and other needed agreement are used connection, if want and can also connect by using other appropriate protocol, and described connection for example can be grouping or circuit switched.This sequence only is used to illustrate of the present invention may the use.(http://www.ietf.org) described SIP (Session Initiation Protocol) and described the DIAMETER basic agreement in IETF RFC 3588 in IETF RFC 3261.External network 3 sends the SIP INVITE that comprises user identity 17 to network node 2.Use user identity, network node 2 sends SIP 100TRYING response to AAA node 13 transmission apply for information 18 and the caller in external network 3.AAA node 13 is tabulated with the message 20 of the information that comprises the user and whether be authorized in heterogeneous network and candidate's Access Network with user identity and is replied, and described tabulation will be used to set up the initial connection to mobile host in Access Network.Network node 2 can come the scrutiny tabulation according to the order that tabulation is set up, and attempts to be established to the initial connection of the mobile host 1 in each Access Network 7.These all candidate item in described connection has been established or has tabulated finish after having been attempted.In process 21, set up initial communication to mobile host 1, described mobile host 1 is notified the network node 2 of available Access Network 7, and described network node 2 is used to can visit suitable Access Network 7 needed data from next the providing to mobile host 1 of the help of AAA node 13.In the process 22 of mobile host 1 visit first Access Network 7, carry out necessary preparation, such as the user in the described network of authentication, and the user in this Access Network territory distributes identity.23, described identity is sent to network node 2 from mobile host 1, and the caller of described network node 2 in external network 3 sends SIP 180RINGING response 24.25 and 26, identical process in the execution and 22 and 23 in another Access Network, and after sending SIP 180RINGING response 24, network node 2 caller in external network 3 in all Access Network 7 territories sends the SIP 200OK response 28 with user identity.The user of caller in the external network 3 in mobile host 1 sends SIP ACK message 29, and uses session description protocol SDP (IETF RFC 2327) and resource to keep related protocol (not describing in more detail) here in process 30 and come each user identity in mobile host 1 to set up media session.When media session finished, the caller of the user in the mobile host 1 in external network 3 sent SIP BYE message 31, and described caller responds with SIP 200OK response 28.

Fig. 8 illustrates in greater detail the example of the sequence that is mainly illustrated in the step 21-30 of Fig. 6 and Fig. 7, use the GPRS network service to set up with the initial of mobile host in this example and be connected.In this example, mobile host parts X4 has movable GPRS and subscribes, and has the network coverage and visit to the GPRS network of being discussed.Network node 2 sends PDP PDU 36 to Gateway GPRS Support Node GGSN 33, described Gateway GPRS Support Node GGSN 33, described Gateway GPRS Support Node GGSN sends MAP (MAP) to original location register (HLR) 34 and sends routing iinformation (Send Routing Information SRI) message 37, and responds to GGSN 33 with SRIACK message 38.GGSN 33 sends PDU notice request 39 message to Serving GPRS Support Node (SGSN) 35 then, and described Serving GPRS Support Node utilizes PDU push-notification-answer 40 message to respond to returning.SGSN (35) sends request PDP context activation message 41 to mobile host parts X4 then, and carries out pdp context activation 42.Now mobile host parts X4 and mobile host parts Y5 connect 43 and mobile host parts Y5 carry out scanning 44 to available Access Network, and send message 45 to GGSN 33, described message 45 comprises the information of available Access Network 7 together with their QoS characteristic and from the control information of control in the mobile host 1 and measured database 10.GGSN 33 sends message 45 to network node 2 in addition.Network node 2 is with the content of AAA node 13 processing messages 45 and utilize the message 46 that comprises 7 tabulations of candidate's Access Network to return to mobile host parts Y5 together with the QoS contract of each network and authentication and authorization information to respond.Mobile host parts Y5 prepares (such as authenticated user in the Access Network of being discussed) so that use described information to roam in the Access Network 7, and in 47, obtain user identity and QoS information in the Access Network territory, mobile host parts Y5 sends to network node 2 to described information then in message 48, at network node described in 49 the SIP INVITE is branched to described user identity, and set up media session and to all user identity 30 Resources allocation in needed network.

Fig. 9 shows the message sequence chart that wherein starts the example of session at mobile host.In described example, mobile host has been prepared to roam in Access Network, and is certified and authorize in the Access Network of being discussed such as it, and in described mobile host needed user identity in known in advance each Access Network territory.In this specific example, GPRS network also is used as the carrier of the message from the mobile host to the network node, in the present invention, in order to be implemented in the network signal purpose in the heterogeneous network, any available Access Network that can set up communication between mobile host and network node can be used for the authentication and authorization mobile host.Sequence starts from mobile host parts Y 5 and utilizes mobile host parts X 4 to start communication 43, and described mobile host parts X 4 sends to SGSN35 and activates PDP Context message 50, and described SGSN sends to GGSN 33 and creates PDP Context request message 51.GGSN (33) utilizes establishment PDP Context response message 52 to return to SGSN 35 and responds, and SGSN 35 accepts message 53 to mobile host parts X 4 transmission activation PDP Contexts.Here mobile host parts Y 5 has communicate by letter (owing to the drawing technique reason, being the unessential message that those of ordinary skills were familiar with and some are not shown) of being set up with network node 2.In order to make the reader can be easy to following message is shone upon mutually with IETF SIP standard RFC 3261, people can analogize to UAC to each user identity in the mobile host 1, and network node 2 can be regarded as UAS.Notice that this is an example; In any case the present invention is not limited thereto analogy.Below in the example, the session that starts in the mobile hosts 1 at mobile host parts Y 5.Mobile host parts Y 5 sends SIP INVITE 17 to network node 2, and described network node 2 sends SIP INVITE 17 and sends SIP 100TRYING response 19 to mobile host parts Y5 to external network 3.External network 3 utilizes SIP 180RINGING response 24 to respond to network node 2, and described network node 2 sends SIP 180RINGING response 24 to mobile host parts Y 5.External network 3 sends SIP 200OK response 28 to network node 2, and described network node 2 sends SIP 200OK response 28 to mobile host parts Y 5.Here carry out SIP INVITE 17 until the SIP 200OK from network node 2 to mobile host parts Y 5 responds 28 sequence for all user identity from mobile host parts Y 5 to network node 2, and when finishing these, mobile host parts Y 5 sends SIP ACK message 29 to external network 3.In process 30, set up actual media session between the called party in user identity in mobile host 1 and the external network 3 then, its details deeper is not shown here.When the called party in the external network 3 when mobile host parts Y5 sends SIP BYE message, stop this session, described mobile host parts Y 5 utilizes SIP 200OK response 32 to respond to external network 3.

Figure 10 is the message sequence chart of signalling example between the Institute of Electrical and Electronics 802.11x WLAN access point 54 of mobile host parts Y 5 and support IEEE 802.11e QoS mechanism principle.How (as 802.16,802.20,802.15UWB and UMTS PS RAB) support the details of QoS mechanism to change in other access network technology, but employed basic principle also can be used for other access network technology in this example.Mobile host parts Y 5 sends the 802.11MAC management activities information A DDTS QoS action request 55 that comprises the QoS solicited message with the form of traffic flow parameters to (QAP) access point 54 with 802.11e service quality function, wherein said mobile host parts Y 5 comprises station QSTA with service quality function and is certified and be associated with described access point 54 in 802.11 Access Networks of being paid close attention in this has the WLAN Access Network of 802.11e function, and described Access Network is carried out and is handled 56, and wherein the user is authorized to and controls the content of analyzing the QoS request by permission well-known to those skilled in the art.QAP access point 54 utilizes 802.11MAC management activities information A DDTS QoS action response 57 to respond then, the available QoS that is supported provides information to mobile host parts Y 5, if response ADDTS QoS action response 57 object codes of being advised change in creating the Business Stream of being asked, so described mobile host parts Y 5 can utilize the new ADDTS sequence 58 that comprises the QoS assignment information that requires to respond.After successfully setting up Business Stream, implementation 59 then, wherein connect, the QoS control and the metrical information of being consulted between mobile host parts Y 5 and access point 54.As an example of the operation parameter QoS service of in 802.11e, being supported, explained characteristic here in the session operating period system of reality, wherein access point is carried out control channel visit (HCCA) and is consulted 64, and it is made up of item 60-63.Message 60 is included in CAP QoS (+) the CF-poll of the QoS measurement result that AP 54 ends are carried out, mobile host parts Y 5 stores described result in control and the measured database 10 in process 61, message 62 is QoS (+) CF-ACK with QoS measurement result from mobile host parts Y 5 then, 63, AP 54 handles described message then.Those skilled in the art will know that 802.11e also supports other QoS mechanism,, in this example, do not explain these mechanism such as distributed channel access (EDCA).

How Figure 11 illustrates in greater detail in the 802.11e frame structure transmission information between mobile host parts 5 and access point 54.The target beacon transmit time 65 is time points of representing with beacon 66, and in the time between beacon 66, contention idling cycle 73 and contention 74 have formed the structure that is called superframe.Carry out regular QoS at contention idling cycle 73 and consult, be in limit priority in the transmission of described QoS negotiation on link, this has guaranteed to carry out at the fixed time all the time message transport.CF-QoS poll 67 beginnings of sequence to send by access point 54, mobile host parts Y 5 usefulness requests sends (Request To Send RTS) 68 this is responded, and access point sends clear to send (Clear To Send CTS) 69, mobile host parts Y 5 sends QoS information in MSDU 70 then, and access point is carried on the back the data of carrying in ACK message 71, and the contention idling cycle finishes at CF end 72.Transmission has the communication service of qos feature in contention 74.Notice that contention idling cycle 73 is optional.

Figure 12 shows the control in the mobile host and the architecture of measured database; In this specific example, a 75-82 represents different access network technologies.Arrow 83 shows different overlapping networks; If if this means and in some technology, want and the ability of mobile host allows, can visit several different Access Networks simultaneously, perhaps can select one of them.The heterogeneous networks of being discussed for example can be by different Virtual network operator operations.As an example, access network technology can be following technology: 75GSM telephone exchange speech, the 76GSM circuit switched data, 77GPRS/EDGE, 783G WCDMA (UMTS), 79I EEE 802.11a, b, g or n, 80IEEE 802.16,81IEEE 802.20 and 82IEEE UWB or wired visit.Item 84 illustrates in greater detail an example of data-base recording, and described record shows the internal structure of data that each Access Network is stored.Record 84 has the internal structure of four element 85-88, and each element is the configuration that is used to store the data of each QoS priority class in this example.Such 85 is data that each the highest QoS priority class is stored, and 86 are used for higher QoS priority class, and 87 are used for middle QoS priority class and 88 is used for lower QoS priority class.The present invention does not limit the number of QoS priority class, and using 4 different priority class and this usually in the reality also is the reason of using four classes why here.Each element 85-88 has stored following information at least: initial Q oS parameter value, be the measured qos parameter value of AP and mobile host, threshold value qos parameter value, restriction qos parameter value, credit value, the concrete credit coefficient of operator and employed user identity in specific Access Network territory.The qos parameter of smallest group is made up of data throughout, delay and jitter value.Data throughout shows to be determined in the period via connecting the data volume that is sent, length of delay shows in packet in fact by successful scheduled transmission and on average be stored in time quantum in the transmission buffer (for example buffer in layer 2) of access technology implementation before successfully sending, and jitter value shows the statistics variations of length of delay then.In brief, handle qos parameter value listed above according to following manner: initial Q oS parameter value storage is based on the QoS information of the SLA (service level agreement) of concrete network, obtains or can manually be stored by the end user in the AAA node during initial setting up that these data for example can network connects in this specific Access Network.As described in the example among Figure 10 and Figure 11, obtain measured qos value.The mean value of threshold value qos value will be used as and show upwards or the checkpoint of the credit value of this specific connection of counting downwards.The restriction qos value shows measured QoS situation, and wherein the credit of Lian Jieing is set to zero immediately and begins by force to connect and re-routes.As mentioned above, credit value is to be used to illustrate the logarithm how Access Network fulfils qos requirement.If QoS measures on the QoS threshold value, credit is upwards counted so, otherwise counts downwards.Counting rate on each direction also is different, makes connecting under the situation about may go wrong quick-recovery soon.The concrete credit coefficient of operator is used for making the end user can have the device that is used to create the personalized network preference, for example owing to different charging policy or other reason.The following credit value that utilizes when operation: the available network of mobile host scanning when connection is set up, credit value and the concrete credit multiplication of operator and have that the highest result's a value is the main Access Network candidate who is used for further being connected foundation, describe as Fig. 8.During operation, if the credit value that be multiply by is lower than definite threshold value, begin so as described in Figure 13 to connect and re-route, if and described value is below limiting value, discharge connection so immediately and begin possible connection rerouting, and at first set up new connection in the situation formerly and after communication service has been taken in new connection, discharge old connection.

Figure 13 is used to illustrate owing to the service quality that is reduced the message sequence chart that is reconfigured for the situation general survey of another Access Network via the existing connection of an Access Network.Described sequence starts from externally setting up the media session of being discussed 30 between network 3 and the mobile host 1 via the access point in first Access Network 54.The QoS that is carried out during Connection Service measures and shows that 89 the connection credit that multiply by the concrete credit coefficient of operator has been lower than threshold value, and calls connection rerouting activity.Mobile host 1 has the authorization message of the best credit value of available Access Network from network node 2 requests with message 45, from then on described available Access Network is known as second Access Network, then the network node 2 usefulness message 46 that comprises the authorization message of the QoS contract value of second Access Network and second Access Network responds, the access point 54 of described mobile host in second Access Network sends and comprises the authorization message of second Access Network and the message 55 of QoS solicited message, and the second Access Network implementation 56, wherein said user be authorized to and the content requests of QoS analyzed.The available QoS that supports to some extent to mobile host 1 apparatus of access point 54 in second Access Network provides the response message 57 of information to respond then, and the message 58 that described mobile host 1 usefulness comprises desired QoS assignment information responds.Implementation 59 then, wherein connect, the QoS control and the metrical information of being consulted between the access point 54 in the mobile host 1 and second Access Network.Mobile host 1 sends message 90 to the external network that has about the information of the new connection of setting up via second Access Network.In process 30, be routed to second Access Network connecting from first Access Network, and in process 91, discharge connection via first Access Network.

Claims

1. one kind at integrated mobile host in the heterogeneous network system of communication system, described heterogeneous network system provides the support of communicating by letter via a plurality of Access Networks (7) between mobile host in heterogeneous network (1) and the network node (2), described mobile host (1) is characterized in that described mobile host (1) provides shared platform to a plurality of Access Networks (7), and has:

Being used for a plurality of Access Networks via described heterogeneous network system comes the connection of being set up is carried out regularly and based on the device of the qos measurement of incident, so that in mobile host, have between the receiving entity that has service quality function in the sending entity of service quality function and the Access Network and carry out qos measurement, and described service quality be measured as by bps data throughout, data transfer delay, transfer of data shake, packet loss rate and packet error rate or these service quality elements in selection and

The device that is used for the service level agreement information of network node (2) request Access Network from heterogeneous network, so that described service level agreement information is made up of the selection of service quality element,

And described mobile host (1) comprising:

Control and measured database (10) are used to the result that stores described service level agreement information and be used to store described qos measurement,

Professional routing function (9) is used for carrying out to connect via a plurality of Access Networks (7) of supporting described heterogeneous network system setting up, connecting to discharge and rebulid with being connected,

Control logic function (8), being used to call the professional routing function (9) of described mobile host (1) sets up, connects to discharge and rebulid with being connected so that carry out to connect via a plurality of Access Networks (7) of supporting described heterogeneous network system, described result who calls the described qos measurement of being stored in the control that is based on mobile host (1) and the measured database (10) and described service level agreement information, and

Described mobile host (1) also is supported in the communication between described mobile host (1) and a plurality of Access Network (7) simultaneously.

2. mobile host as claimed in claim 1, it is characterized in that described heterogeneous network system has, the needed function of initial connection that provided by a plurality of Access Networks (7) for setting up by using is provided, and sets up the device of initial connection between the mobile host in heterogeneous network system (1) and the network node (2).

3. mobile host as claimed in claim 2 is characterized in that described mobile host (1) certified and mandate in described heterogeneous network system by using the described initial connection of being set up between mobile host (1) in described heterogeneous network system and the network node (2).

4. mobile host as claimed in claim 2 is characterized in that described mobile host (1) and network node (2) have the device of the described initial connection of being set up between the mobile host (1) that is used for being encrypted in heterogeneous network system and the network node (2).

5. mobile host as claimed in claim 4, it is characterized in that using the described initial connection of being set up and provide a plurality of mandates and authentication information from described network node (2) to mobile host (1) between mobile host (1) and network node (2), described a plurality of authentication and authorization information are used for to a plurality of Access Networks (7) authentication of supporting described heterogeneous network system and mandate mobile host (1) by described mobile host (1).

6. as any one described mobile host among the claim 1-2, it is characterized in that described mobile host (1) has and be used for being collected in Access Network and have the device that has qos measurement result measured between the receiving entity of service quality function in the sending entity of service quality function and the described mobile host.

7. as any one described mobile host among the claim 1-2, it is characterized in that described mobile host (1) has the identity according to the Access Network that is scanned (7), the result of the described qos measurement of in the control of described mobile host (1) and measured database (10), being stored, the service level agreement information of in the control of described mobile host (1) and measured database (10), being stored, carry out the device that Access Network (7) is selected from information that network node received or according to the combination of these information elements, and utilize in the control of described mobile host (1) and measured database (10) institute's stored parameters to adjust.

8. the heterogeneous network system of an integrated communication system, described heterogeneous network system provides the support of communicating by letter via a plurality of Access Networks (7) between mobile host in heterogeneous network (1) and the network node (2), it is characterized in that described network system comprises mobile host (1), described mobile host (1) has:

Be used for via a plurality of Access Networks of described heterogeneous network system the connection of being set up is carried out regularly and based on the device of the qos measurement of incident, so that in mobile host, have between the receiving entity that has service quality function in the sending entity of service quality function and the Access Network and carry out qos measurement, and described service quality be measured as by bps data throughout, data transfer delay, transfer of data shake, packet loss rate and packet error rate or these service quality elements in selection and

Be used for the device of the service level agreement information of network node (2) request Access Network, make described service level agreement information form by the selection of service quality element from heterogeneous network,

And the mobile host of described network system (1) has three functional modules that are used for heterogeneous network, comprising:

Professional routing function (9), be used for via a plurality of Access Networks (7) of supporting described heterogeneous network system carry out connect set up, connect discharge and be connected rebulid and

Control logic function (8), be used to call the professional routing function (9) of described mobile host (1), set up, connect to discharge and rebulid so that carry out to connect with being connected via a plurality of Access Networks (7) of supporting described heterogeneous network system, described result who calls the described qos measurement of being stored in the control that is based on described mobile host (1) and the measured database (10) and described service level agreement information

And described mobile host (1) also is supported in the communication between described mobile host (1) and a plurality of Access Network (7) simultaneously.

9. network system as claimed in claim 8, it is characterized in that described mobile host (1) has the identity according to the Access Network that is scanned (7), the result of the qos measurement of in the control of described mobile host (1) and measured database (10), being stored, the service level agreement information of in the control of described mobile host (1) and measured database (10), being stored, carry out the device that Access Network (7) is selected from information that network node received or based on the combination of these information elements, and utilize in the control of described mobile host (1) and measured database (10) institute's stored parameters to adjust.

10. as any one described network system among the claim 8-9, it is characterized in that described heterogeneous network system has, the needed function of initial connection that provided by a plurality of Access Networks (7) for setting up by using is provided, and sets up the device of initial connection between the mobile host in heterogeneous network system (1) and the network node (2).

11. as any one described network system among the claim 8-9, when it is characterized in that externally mobile host (1) the startup communication of network (3) in heterogeneous network is set up, described network node (2) supports selection Access Network (7) to set up initial connection, so that by authentication, mandate and (AAA) protocol interface function (14) of keeping accounts the control logic function (15) of selecting the needed information of judgement to can be network node is used.

12. network system as claimed in claim 10 is characterized in that described network node (2) and mobile host (1) have the device of the described initial connection of being set up between the mobile host (1) that is used for being encrypted in heterogeneous network system and the network node (2).

13. network system as claimed in claim 10, it is characterized in that described network node (2) provides support to described mobile host (1) to described mobile host (1), communicate by letter so that use described initial connection between network node (2) and mobile host (1) to come to set up to a plurality of Access Networks (7).

14. as any one described network system among the claim 8-9, the communication that it is characterized in that mobile host (1) and the authentication of described network node (2) in heterogeneous network, authorizes and keep accounts between (AAA) node (13) provides support.