CN101102584A - A method and device for switching between isomerous wireless communication systems - Google Patents
A method and device for switching between isomerous wireless communication systems Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00835—Determination of neighbour cell lists
Abstract
The method comprises: the mobile node makes a switching decision and gets the information about its neighboring network access points; the mobile node establishes connection with one target network point in the list of its neighboring network access points; if the establishment of network connection fails, the mobile node establishes connection with other one un-connected target network access point in list of its neighboring network access points.
Description
Technical field
The present invention relates to wireless communication technology field, be meant the method and apparatus that switches between a kind of heterogeneous wireless communication system especially.
Background technology
Along with development of wireless communication devices, increasing wireless communication standard has been realized the commercial network operation, as (the IEEE of electric and electronic association, Institute of Electrical and ElectronicsEngineers) wireless protocol standard such as 802.11/802.15/802.16,2G, 2.5G wireless communication standard and promptly will realize the 3G standard of network operation.
Wireless networks such as IEEE 802.11/802.15 develop into microcellulor, third generation partner program (3GPP, 3rd Generation Partnership Project), wireless network such as third generation partner program 2 groups (3GPP2,3rd Generation Partnership Project 2), IEEE802.16 develops into macrocellular.In wireless network operation in the future, may intersect covering between microcellulor in these wireless networks and the macrocellular mutually, the mobile subscriber experiences wireless traffic in these wireless networks.
Switch for solving the roaming of mobile subscriber between systems such as 3GPP/3GPP2/IEEE 802.11/802.15/802.16, IEEE has set up 802.21 working groups, is responsible for working out public switching framework, requirement that standard is switched and corresponding handover mechanism.Owing to may support different wireless standards between mobile subscriber and the network, therefore 802.21 standard development purposes are to provide the handoff procedure between the dissimilar medium, by supporting the switching between the dissimilar medium to strengthen the experience of user to wireless network, target is to make the mobile subscriber can select best network connection type automatically when wireless network roaming and finish seamless switching, and need not the mobile subscriber intervene.
802.21 the handoff solution of media-independent introduce and a kind ofly can guarantee professionally between the dissimilar medium to switch successional framework, in order to solve continuity and the seamlessness that the mobile subscriber is switched, need between network element, realize one group of handoff functionality collection.These handoff functionalities of configuration have formed a new media-independent switchable layer (MIH, MediaIndependent Handover) in the mobility management protocol layer of network element, are called the MIH layer.The upper strata of MIH is that MIH user belongs to three layers mobile management and application protocol, comprises mobility management protocols such as mobile IP (Internet Protocol), 3GPP up link and switchover policy, transmission, application etc.MIH lower floor is exactly the link layer of various Access Networks, as link layers such as 802.11/802.15/802.16,3GPP.The MIH layer provides handoff functionality (MIHF, Media Independent HandoverFunction) with media-independent by Event Service, command service and information service in self function.
Mobile subscriber's media-independent handoff procedure is as follows at present.Referring to Fig. 1, mobile node (MN, Mobile Node) current 802.11 networks have together been set up connection, owing to causing switchable layer among the MIH user, reasons such as link condition changes make the decision of switching, and handling capacity is found and method such as information request has been obtained the ability information of ambient network, and according to these Information Selection the objective network 3GPP of switching.
The MIH user of 101:MN generates one and initiates the MIHF unit that handoff request message is sent to MN.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 102:MN.
103:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and be sent to the objective network that MN chooses, be i.e. the MIHF unit of the Network Access Point of 3GPP.
104: after objective network 3GPP has inquired about resource, return one by its MIHF unit and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 105:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the success of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 3GPP access point.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 106:MN.
The MIH user of 107:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 108:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on the 3GPP link of selection.
The MIH user of 109:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 110:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
111:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that request message is sent to the 3GPP Network Access Point.
After the MIHF unit of 112:3GPP Network Access Point is received and switched the execution request message, return one to the MIHF unit of 802.11 Network Access Points and switch execution response message, the connection that indication is switched and set up link layer.
113:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that response message is sent to MN.
The MIHF unit of 114:MN will switch carries out the MIH user that response message is forwarded to MN.
So far, handoff procedure finishes, and MN sets up being connected of link layer with the access point of 3GPP network.After new link establishment connects, the 802.11 network insertions data cached 3GPP of the being transmitted to Network Access Point of naming a person for a particular job, MN starts to the registration process of 3GPP network.802.11 Network Access Point is removed and 802.11 networks is connected with link MN.MN starts to the registration process of 3GPP network, by the link of 3GPP network carrying MN.
In this handoff procedure, the switching in the initiation switching response message and 112 in 105 is carried out response message and is comprised parameter, and parameter is that handoff failure or switch is carried out.When this parameter is handoff failure, receive that the switching initiator of this message will stop switching; When this parameter was carried out for switching, switching was with complete.Though can only switch with selecting a network when switching for a plurality of networks that switch around finding out before switching, the result of switching has only success or fails two kinds of results.Therefore under this switching mode, handover success may be lower, communication disruption possible higher caused the decline of quality of service easily.
Summary of the invention
In view of this, method of the present invention is the method and apparatus that switches between a kind of heterogeneous wireless communication system is provided, and has solved in the above-mentioned handoff technique can not to find out before switching once more behind the handoff failure and can initiate the problem switched once more for a plurality of networks that switch.
For addressing the above problem, the invention provides the method for switching between a kind of heterogeneous wireless communication system, comprising:
Mobile node is made and is switched decision, obtains its information of neighbor networks access point on every side;
With described around an objective network access point in the information of neighbor networks access point connect;
The failure if connect, then once more with described around do not set up the objective network access point that is connected in the information of neighbor networks access point and connected.
Wherein, described mobile node is made and is switched decision, and the process of obtaining the information of neighbor networks access point around it comprises:
After mobile node is made and switched decision, obtain its information of neighbor networks access point on every side; Or after obtaining the information of neighbor networks access point around the mobile node, mobile node is made and is switched decision.
Wherein, further comprise after the described information of obtaining neighbor networks access point around it:
Utilize its information generation of neighbor networks access point on every side to tabulate according to the objective network access point of prioritization, described tabulation is the set that comprises the objective network Access Point Identifier of objective network access point network type, objective network access point Media Access Control Address, objective network access point priority parameters.
Wherein, further comprise after the described generation objective network access point tabulation:
Be kept at the tabulation of described objective network access point in the mobile node or be kept in the media-independent handoff functionality MIHF unit of current service Network Access Point of mobile node.
Wherein, when objective network access point tabulation is kept in the mobile node, with an objective network access point in the neighbor networks on every side connect into:
The MIHF unit of the Network Access Point that mobile node and objective network access point tabulation medium priority are the highest or the MIHF unit of any one Network Access Point connect.
Wherein, the described failure that connects is:
Mobile node is received from the switching that comprises the handoff failure parameter of objective network access point and is prepared response message or switch to carry out response message.
Wherein, when objective network access point tabulation is kept in the MIHF unit of current service Network Access Point of mobile node, with an objective network access point in the neighbor networks on every side connect into:
The MIHF unit of the Network Access Point that the MIHF unit of the current service Network Access Point of mobile node and objective network access point tabulation medium priority are the highest or the MIHF unit of any one Network Access Point connect.
Wherein, the described failure that connects is:
The MIHF unit of the current service Network Access Point of mobile node is received from the switching that comprises query resource failure parameter of objective network access point and is prepared response message.
Wherein, when objective network access point tabulation is kept in the MIHF unit of current service Network Access Point of mobile node, the described failure that connects is:
The current service Network Access Point of mobile node is received from the switching that comprises the handoff failure parameter of objective network access point and is carried out response message.
Wherein, described once more with described around do not set up in the information of neighbor networks access point the objective network access point that is connected connect into:
The name a person for a particular job switching that comprises the parameter of failing of the current service network insertion of mobile node is carried out response message and is sent to mobile node, mobile node sends message to its current service Network Access Point, described current service Network Access Point once more with described around do not set up the objective network access point that is connected in the information of neighbor networks access point and connected.
Wherein, further comprise:
Comprise counter, write down the frequency of failure that connects,, then stop switching when the frequency of failure that connects surpasses predetermined threshold.
Wherein, further comprise:
Comprise timer, the time that record connects, surpass predetermined threshold and not successful connection when the time that connects, then stop switching.
Wherein, further comprise:
After the MIHF unit of mobile node and objective network access point connected, the former Network Access Point of mobile node was to objective network access point forwarding cache data, and mobile node starts registration process, and the former Network Access Point of mobile node is removed former link.
The present invention also provides device for switching between a kind of heterogeneous wireless communication system, comprising:
Switch unit is used to make and switches decision and notify acquiring unit;
Acquiring unit is used to obtain the mobile node feature and the ability information of neighbor networks on every side;
Memory cell is used to store the information that acquiring unit obtains;
Linkage unit is used for connecting with memory cell objective network access point; After connection failure, do not set up the objective network access point that is connected and connected once more with in the objective network access point tabulation.
Wherein, also comprise:
Tabulation generation unit, the information that is used to obtain memory cell generate and contain objective network access point network type, objective network access point Media Access Control Address, objective network access point priority parameters and according to the tabulation of prioritization; It is the highest and do not set up the objective network access point that connects and connect that described linkage unit also is used for obtaining current priority from the tabulation generation unit.
Wherein, also comprise:
Counter unit is used for writing down the frequency of failure that connects;
The counting judgement unit is used to differentiate when the frequency of failure that connects of counter unit record surpasses predetermined threshold, and the notice linkage unit stops connecting.
Wherein, also comprise:
Timer unit is used for record and connects the time;
The timing judgement unit is used to differentiate when the time that connects of timer unit record surpasses predetermined threshold, and the notice linkage unit stops connecting.
The network information tabulation of method of the present invention by generating, after setting up handoff failure with objective network, in network information tabulation, can initiate handoff request successively according to priority for each network that switches, can not before switching, find out the problem that to initiate switching for a plurality of networks that switch once more behind the solution handoff failure, improve the possibility of handover success significantly, avoid communication disruption in handoff procedure, occurring, improved communication service quality.
Description of drawings
Fig. 1 is the schematic diagram that switches between the heterogeneous wireless communication system;
Fig. 2 is the flow chart of the inventive method;
Fig. 3 is the schematic diagram of the inventive method first embodiment;
Fig. 4 is the schematic diagram of the inventive method second embodiment;
Fig. 5 is the schematic diagram of the inventive method the 3rd embodiment;
Fig. 6 is the schematic diagram of the inventive method the 4th embodiment;
Fig. 7 is the schematic diagram of the inventive method the 5th embodiment;
Fig. 8 is a device schematic diagram of the present invention.
Embodiment
The network information tabulation of method of the present invention by generating, each the highest and do not set up the objective network access point that is connected and connect with the network list medium priority; The failure if connect then connects according to next objective network access point in priority orders and the network list.
Describe method of the present invention in detail below in conjunction with accompanying drawing.Method step of the present invention is referring to Fig. 2.
Step S201: mobile node is made and is switched decision, obtains its information of neighbor networks access point on every side;
Step S202: with described around an objective network access point in the information of neighbor networks access point connect;
Step S203: if connect failure, then once more with described around do not set up the objective network access point that is connected in the information of neighbor networks access point and connected.
Network information tabulation in the method for the present invention is referring to table 1, table 1 is the set of objective network access point link identifier, comprises the network type of objective network access point, the Media Access Control Address of objective network access point, three parameters of priority of objective network access point.
| Title | Type | Scope | Introduce |
| The objective network tabulation | Character string | N/A | The set of the identifier of objective network access point comprises: the network type of objective network access point; The Media Access Control Address of objective network access point; The priority of objective network access point. |
| Network type | Integer | 0X01-802.11 0X02-802.15 0X03-802.16 0X04-3GPP 0X05-3GPP2 | The network type of objective network access point |
| The address of Network Access Point | MAC Address | N/A | The Media Access Control Address of objective network access point |
| Priority | Integer | 0-255 | The priority 0 of objective network access point: priority 1 (the highest) 1: priority 2 255: priority 2 56 (minimum) |
Table 1
The network type INTEGER representation of objective network access point, each integer value are represented a current type for the objective network access point that switches; The address of objective network access point is the Media Access Control Address of objective network access point; The excursion of value is represented 256 priority by 0 to 255 in the priority of objective network access point.
Describe the application of method of the present invention in each embodiment in detail below in conjunction with accompanying drawing.First embodiment of the inventive method is now described in conjunction with Fig. 3.Suppose that MN is current and set up connection with 802.11 networks, MN current service Network Access Point is 802.11 Network Access Points.Cause switchable layer among the MIH user of mobile node to make the decision of switching owing to reasons such as link condition change, and handling capacity find and method such as information request obtained around the ability information of neighbor networks access point, and formed according to the objective network of prioritization according to these information and to have tabulated.In the tabulation that forms, suppose that the priority of 802.16 networks is the highest, be priority 1, the priority of 3GPP network is 2.
The MIH user of 301:MN generates one and initiates the MIHF unit that handoff request message is sent to MN, and the Network Access Point the highest with the network list medium priority connects.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 302:MN.
303:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the MIHF unit that priority that MN chooses is the Network Access Point of 1 objective network 802.16.
304: objective network 802.16 has been inquired about and has been returned one by its MIHF unit after the resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
305:802.11 after the MIHF unit of Network Access Point is received and switched the preparation response message, based on the failure of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the handoff failure parameter.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 306:MN.
After the MIH user of 307:MN receives parameter in this message and the message, network priority is 2 objective network in objective network tabulation again, handoff request message is initiated in one of the transmission that is the Network Access Point of 3GPP, the Media Access Control Address that comprises the 3GPP Network Access Point in this message will be initiated the MIHF unit that handoff request message is sent to MN earlier.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 308:MN.
309:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the objective network that MN chooses, be i.e. the MIHF unit of the Network Access Point of 3GPP.
310: objective network 3GPP has inquired about and has returned one by its MIHF unit after the resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 311:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the success of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 3GPP access point.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 312:MN.
The MIH user of 313:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 314:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on the 3GPP link of selection.
The MIH user of 315:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 316:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
317:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that request message is sent to the 3GPP Network Access Point.
After the MIHF unit of 318:3GPP Network Access Point is received and switched the execution request message, return one to the MIHF unit of 802.11 Network Access Points and switch execution response message, the connection that indication is switched and set up link layer.
319:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that response message is sent to MN.
The MIHF unit of 320:MN will switch carries out the MIH user that response message is forwarded to MN.
So far, handoff procedure finishes, and MN sets up being connected of link layer with the access point of 3GPP network.After new link establishment connects, the 802.11 network insertions data cached 3GPP of the being transmitted to Network Access Point of naming a person for a particular job, MN starts to the registration process of 3GPP network.802.11 Network Access Point is removed and 802.11 networks is connected with link MN.Link by 3GPP network carrying MN.
Second embodiment of the inventive method is described below in conjunction with Fig. 4, suppose that MN is current and set up connection with 802.11 networks, switchable layer is made the decision of switching among the MIH user who causes owing to reasons such as link condition change, and handling capacity find and method such as information request obtained around the ability information of neighbor networks access point, and formed according to the objective network of prioritization according to these information and to have tabulated.In the tabulation that forms, suppose that the priority of 802.16 networks is the highest, be priority 1, the priority of 3GPP network is 2.
The MIH user of 401:MN generates one and initiates the MIHF unit that handoff request message is sent to MN, and the Network Access Point the highest with the network list medium priority connects.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 402:MN.
403:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the MIHF unit that priority that MN chooses is the Network Access Point of 1 objective network 802.16.
404: objective network 802.16 has been inquired about and has been returned one by its MIHF unit after the resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 405:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the success of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 802.16 access points.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 406:MN.
The MIH user of 407:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 408:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on 802.16 chains of selection.
The MIH user of 409:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 410:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
Carry out the MIHF unit that request message is sent to 802.16 Network Access Points 411:802.11 the MIHF unit of Network Access Point will switch, notice is prepared to switch on 802.16 the network.
Carry out response message 412:802.16 the MIHF unit of Network Access Point returns to switch to the MIHF unit of 802.11 Network Access Points, and switching the parameter of carrying out interpolation handoff failure in the response message.
413:802.11 after the MIHF unit of Network Access Point is received and switched the execution response message, carry out the MIHF unit that response message is forwarded to MN with switching.
The MIHF unit of 414:MN will switch carries out the MIH user that response message is forwarded to MN.
After the MIH user of 415:MN receives parameter in this message and the message, network priority is 2 objective network in objective network tabulation again, handoff request message is initiated in one of the transmission that is the Network Access Point of 3GPP, the Media Access Control Address that comprises the 3GPP Network Access Point in this message will be initiated the MIHF unit that handoff request message is sent to MN earlier.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 416:MN.
417:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the objective network that MN chooses, be i.e. the MIHF unit of the Network Access Point of 3GPP.
418: objective network 3GPP has inquired about and has returned one by its MIHF unit after the resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 419:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the success of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 3GPP access point.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 420:MN.
The MIH user of 421:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 422:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on the 3GPP link of selection.
The MIH user of 423:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 424:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
425:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that request message is sent to the 3GPP Network Access Point.
After the MIHF unit of 426:3GPP Network Access Point is received and is switched the execution request message, return one to the MIHF unit of 802.11 Network Access Points and switch the execution response message, and in switching the execution response message, add the switching execution parameter, indicate the connection of switching and setting up link layer.
427:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that response message is sent to MN.
The MIHF unit of 428:MN will switch carries out the MIH user that response message is forwarded to MN.
So far, handoff procedure finishes, and MN sets up being connected of link layer with the access point of 3GPP network.After new link establishment connects, the 802.11 network insertions data cached 3GPP of the being transmitted to Network Access Point of naming a person for a particular job, MN starts to the registration process of 3GPP network.802.11 Network Access Point is removed and 802.11 networks is connected with link MN.Link by 3GPP network carrying MN.
After receiving the handoff failure parameter at every turn, the MIH user of MN can not set up connection in network list and the highest objective network access point transmission message of priority connects, if but under the relatively poor situation of network environment, MN may occur and frequently carry out to switch and connect but the situation of handover success not.For this situation, can affect to network and MN.Therefore, in the method for the invention, in the MIH user of MN, be provided with counter or timer,,, then stop switching fully when the threshold value that surpasses counter or timer to inferior counting number of the back retry handoff request of failing or to the total time timing of handoff procedure.
Describe the 3rd embodiment of the inventive method in detail below in conjunction with Fig. 5, suppose that MN is current and set up connection with 802.11 networks, owing to causing switchable layer among the MIH user, reasons such as link condition changes make the decision of switching, and handling capacity is found and method such as information request has been obtained the ability information of ambient network access point, and has formed according to the objective network of prioritization according to these information and to tabulate.In the tabulation that forms, suppose that the priority of 802.15 networks is the highest, be priority 1, the priority of 802.16 networks is 2, the priority of 3GPP network is 3.
The MIH user of 501:MN generates one and initiates the MIHF unit that handoff request message is sent to MN, and the Network Access Point the highest with the network list medium priority connects.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 502:MN.
503:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the MIHF unit that priority that MN chooses is the Network Access Point of 1 objective network 802.15.
504: objective network 802.15 has been inquired about and has been returned one by its MIHF unit after the resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
505:802.11 after the MIHF unit of Network Access Point is received and switched the preparation response message, based on the failure of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the handoff failure parameter.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 506:MN.
After the MIH user of 507:MN receives parameter in this message and the message, network priority is 2 objective network in objective network tabulation again, handoff request message is initiated in one of the i.e. transmission of 802.16 Network Access Point, the Media Access Control Address that comprises 802.16 Network Access Points in this message will be initiated the MIHF unit that handoff request message is sent to MN earlier.
Suppose the not success of current handoff procedure, 508 to 512 process is identical with 502 to 506 process, after MN has received the failure parameter of initiating in the switching response message, network priority is 3 objective network in objective network tabulation again, handoff request message is initiated in one of the transmission that is the Network Access Point of 3GPP, comprises the Media Access Control Address of 3GPP Network Access Point in this message.
The MIH user of 513:MN generates one and initiates the MIHF unit that handoff request message is sent to MN, with the network list medium priority be that 3 3GPP Network Access Point connects.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 514:MN.
515:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the MIHF unit that priority that MN chooses is the Network Access Point of 3 objective network 3GPP.
516: objective network 3GPP has inquired about and has returned one by its MIHF unit after the resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 517:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the failure of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 3GPP access point.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 518:MN.
The MIH user of 519:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 520:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on the 3GPP link of selection.
The MIH user of 521:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 522:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
Carry out the MIHF unit that request message is sent to the 3GPP Network Access Point 523:802.11 the MIHF unit of Network Access Point will switch, notice is prepared to switch on the network of 3GPP.
The MIHF unit of 524:3GPP Network Access Point returns to switch to the MIHF unit of 802.11 Network Access Points carries out response message, and is switching the parameter of carrying out interpolation handoff failure in the response message.
525:802.11 after the MIHF unit of Network Access Point is received and switched the execution response message, carry out the MIHF unit that response message is forwarded to MN with switching.
The MIHF unit of 526:MN will switch carries out the MIH user that response message is forwarded to MN.
If the value of counter is set at 3 among the MIH user of MN, MN and 3 networks connected and all failed this moment, owing to surpassed the number of times of the retry handoff request of setting, then stopped fully switching.
If in the whole process of switching, if the time of switching has surpassed the timing of timer, and handover success not then stops switching fully.
In three above embodiment, the tabulation of the objective network access point of generation also can be kept in the MIHF unit of MN.
In above embodiment, the MIH user of MN is each and objective network tabulation medium priority is the highest and do not set up connected node connects, the present invention also can not set up tabulation and select one not set up the Network Access Point that connects arbitrarily from the neighbor networks access-in point information on every side that obtains, and connects with it.
The present invention can also with the tabulation of objective network access point by initiate handoff request message be sent to mobile node the current service Network Access Point the MIHF unit and be kept at wherein, when receiving the message of preparing response from the switching of objective network access point, if comprise query resource failure parameter in this message and do not satisfy MN and the objective network access point connects, then needn't generate and initiate switching response message and be sent to MN, and directly the highest and do not set up the objective network access point that is connected and connect with the objective network medium priority of tabulating.
Describe the 4th embodiment of the inventive method in detail below in conjunction with Fig. 6, suppose that MN is current and set up connection with 802.11 networks, owing to causing switchable layer among the MIH user, reasons such as link condition changes make the decision of switching, and handling capacity find and method such as information request obtained around the ability information of neighbor networks access point, and formed according to the objective network of prioritization according to these information and to have tabulated.In the tabulation that forms, suppose that the priority of 802.16 networks is the highest, be priority 1, the priority of 3GPP network is 2.
The MIH user of 601:MN generates one and initiates the MIHF unit that handoff request message is sent to MN, and the information of objective network access point tabulation is carried in the inside.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 602:MN, the inside comprises objective network access point link identifier list information, this information containing parameter: network type, mobile node Media Access Control Address, Network Access Point Media Access Control Address, objective network access point priority.
603:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the MIHF unit that priority that MN chooses is the Network Access Point of 1 objective network 802.16.
604: return one by its MIHF unit after objective network 802.16 query resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11, the inside comprises the parameter of query resource failure.
After 605:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the failure of the resource query in this message parameter, select the objective network of the 2nd priority in the objective network access point link identifier tabulation of then from 602, receiving, it is the 3GPP network, generate a handover preparation request message, and be sent to the MIHF unit of 3GPP Network Access Point.
Return one by its MIHF unit after the good resource of 606:3GPP network inquiry and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 607:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the success of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 3GPP access point.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 608:MN.
The MIH user of 609:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 610:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on the 3GPP link of selection.
The MIH user of 611:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 612:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
613:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that request message is sent to objective network 3GPP access point.
614: after the MIHF unit of objective network 3GPP access point is received and switched the execution request message, return one to the MIHF unit of 802.11 Network Access Points and switch execution response message, the connection that indication is switched and set up link layer.
615:802.11 will switching, the MIHF unit of Network Access Point carries out the MIHF unit that response message is sent to MN.
The MIHF unit of 616:MN will switch carries out the MIH user that response message is forwarded to MN.
So far, handoff procedure finishes, and MN sets up being connected of link layer with the access point of objective network 2.After new link establishment connects, the 802.11 network insertions data cached 3GPP of the being transmitted to Network Access Point of naming a person for a particular job, MN starts to the registration process of 3GPP network.802.11 Network Access Point is removed and 802.11 networks is connected with link MN, by the link of objective network 2 carrying MN.If former Network Access Point receives that in step 614 comprising the switching that stops handover information carries out response message, then after completing steps 615, step 616, repeat from step 601 by MN, the Network Access Point of notice MN current service is initiated the switching of objective network access point again, up to this handover success or fall flat.
When the tabulation of objective network access point is saved in the MIHF unit of MN current service Network Access Point, can in the MIHF unit of MN current service Network Access Point, be provided with counter or timer, to the inferior counting number of the back retry handoff request of failing or the total time timing that the back retry of failing is switched, when the threshold value that surpasses counter or timer, then stop fully switching.
Describe the fifth embodiment of the present invention in detail below in conjunction with Fig. 7, suppose that MN is current and set up connection with 802.11 networks, owing to causing switchable layer among the MIH user, reasons such as link condition changes make the decision of switching, and handling capacity is found and method such as information request has been obtained the ability information of ambient network, and has formed according to the objective network of prioritization according to these information and to tabulate.In the tabulation that forms, suppose that the priority of 802.15 networks is the highest, be priority 1, the priority of 802.16 networks is 2, the priority of 3GPP network is 3.
The MIH user of 701:MN generates one and initiates the MIHF unit that handoff request message is sent to MN, and the information of objective network access point tabulation is carried in the inside.
The MIHF unit of handoff request forwards to 802.11 Network Access Point will be initiated in the MIHF unit of 702:MN, the inside comprises objective network access point link identifier list information, this information containing parameter: network type, mobile node Media Access Control Address, Network Access Point Media Access Control Address, objective network access point priority.
703:802.11 after this request is received in the MIHF unit of Network Access Point, generate a handover preparation request message, and send to the MIHF unit that priority that MN chooses is the Network Access Point of 1 objective network 802.15.
704: return one by its MIHF unit after objective network 802.15 query resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11, the inside comprises the parameter of query resource failure.
After 705:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the failure of the resource query in this message parameter, selection priority is 2 objective network 802.16 in the objective network access point link identifier tabulation of then receiving from 702 steps, generate a handover preparation request message, and send to the MIHF unit of the Network Access Point of objective network 802.16.
706: return one by its MIHF unit after objective network 802.16 query resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 707:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the failure of the resource query in this message parameter, selection priority is 3 objective network 3GPP in the objective network access point link identifier tabulation of then receiving from 702 steps, generate a handover preparation request message, and send to the MIHF unit of the Network Access Point of objective network 3GPP.
708: return one by its MIHF unit after the objective network 3GPP query resource and switch the MIHF unit that the message of preparing response is sent to the access point of former network 802.11.
After 709:802.11 the MIHF unit of Network Access Point is received and is switched the preparation response message, based on the success of the resource query in this message parameter, send one to the MIHF unit of MN and initiate switching response message, the inside comprises the information such as Linktype of objective network 3GPP access point.
The MIH user that switching response message is forwarded to MN will be initiated in the MIHF unit of 710:MN.
The MIH user of 711:MN receives and initiates to send a handoff request message to the MIHF unit of MN after the switching response message.
The MIHF unit of 712:MN is sent to the MIHF unit of 802.11 Network Access Points with handoff request message, and this message request switches to the connection of current link on the link of selecting 3GPP.
The MIH user of 713:MN generates switches the MIHF unit of carrying out request message and being sent to MN.
The MIHF unit of 714:MN will switch carries out the MIHF unit that request message is sent to 802.11 Network Access Points.
Carry out the MIHF unit that request message is sent to the 3GPP Network Access Point 715:802.11 the MIHF unit of Network Access Point will switch, notice is prepared to switch on the network of 3GPP.
The MIHF unit of 716:3GPP Network Access Point returns to switch to the MIHF unit of 802.11 Network Access Points carries out response message, and is switching the parameter of carrying out interpolation handoff failure in the response message.
After 717:802.11 the MIHF unit of Network Access Point receives that response message is prepared in this switching, check this moment and find that the handoff request of initiating has surpassed the number of retries of setting, perhaps the timer expiry of setting in above handoff procedure then will stop handoff procedure.Based on the handoff failure parameter in this message, send one to the MIHF unit of MN and switch the execution response message, the inside comprises the parameter of handoff failure.
After the MIHF of 718:MN receives this message, be forwarded to the MIH user of MN, indication stops handoff procedure fully.
When tabulation was kept at the MIHF unit of Network Access Point for target network node, counter or timer can be kept in the MIHF unit of Network Access Point, also can be kept among the MIH user of MN.
In above embodiment, be mobile node according to link condition make switch decision after, the tabulation of regeneration objective network access point, this is a kind of situation in the inventive method, the present invention also can regular or irregular form generate the tabulation of objective network access point, after mobile node is made and switched decision, utilize the tabulation and the objective network access point that generate earlier to connect.
The invention provides device for switching between a kind of heterogeneous wireless communication system,, comprising referring to Fig. 8: switch unit 801, acquiring unit 802, memory cell 803, linkage unit 805,
Acquiring unit 802 is used to obtain the mobile node feature and the ability information of neighbor networks on every side;
Can also add tabulation generation unit 804, counter unit or timer unit 806, counting judgement unit or timing judgement unit 807 in the device of the present invention.
If the 806th, counter unit, the 807th, the counting judgement unit, then
Counter unit is used for writing down the frequency of failure that connects;
The counting judgement unit is used to differentiate when the frequency of failure that connects of counter unit record surpasses predetermined threshold, and the notice linkage unit stops connecting.
If the 806th, timer unit, the 807th, the timing judgement unit, then
Timer unit is used for record and connects the time;
The timing judgement unit is used to differentiate when the time that connects of timer unit record surpasses predetermined threshold, and the notice linkage unit stops connecting.
For method and apparatus 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 (17)
1, the method for switching between a kind of heterogeneous wireless communication system is characterized in that, comprising:
Mobile node is made and is switched decision, obtains its information of neighbor networks access point on every side;
With described around an objective network access point in the information of neighbor networks access point connect;
The failure if connect, then once more with described around do not set up the objective network access point that is connected in the information of neighbor networks access point and connected.
2, method according to claim 1 is characterized in that, described mobile node is made and switched decision, and the process of obtaining the information of neighbor networks access point around it comprises:
After mobile node is made and switched decision, obtain its information of neighbor networks access point on every side; Or after obtaining the information of neighbor networks access point around the mobile node, mobile node is made and is switched decision.
3, method according to claim 2 is characterized in that, further comprises after the described information of obtaining neighbor networks access point around it:
Utilize its information generation of neighbor networks access point on every side to tabulate according to the objective network access point of prioritization, described tabulation is the set that comprises the objective network Access Point Identifier of objective network access point network type, objective network access point Media Access Control Address, objective network access point priority parameters.
4, method according to claim 3 is characterized in that, further comprises after the described generation objective network access point tabulation:
Be kept at the tabulation of described objective network access point in the mobile node or be kept in the media-independent handoff functionality MIHF unit of current service Network Access Point of mobile node.
5, method according to claim 4 is characterized in that, when objective network access point tabulation is kept in the mobile node, with an objective network access point in the neighbor networks on every side connect into:
The MIHF unit of the Network Access Point that mobile node and objective network access point tabulation medium priority are the highest or the MIHF unit of any one Network Access Point connect.
6, method according to claim 5 is characterized in that, the described failure that connects is:
Mobile node is received from the switching that comprises the handoff failure parameter of objective network access point and is prepared response message or switch to carry out response message.
7, method according to claim 4 is characterized in that, when objective network access point tabulation is kept in the MIHF unit of current service Network Access Point of mobile node, with an objective network access point in the neighbor networks on every side connect into:
The MIHF unit of the Network Access Point that the MIHF unit of the current service Network Access Point of mobile node and objective network access point tabulation medium priority are the highest or the MIHF unit of any one Network Access Point connect.
8, method according to claim 7 is characterized in that, the described failure that connects is:
The MIHF unit of the current service Network Access Point of mobile node is received from the switching that comprises query resource failure parameter of objective network access point and is prepared response message.
9, method according to claim 4 is characterized in that, when objective network access point tabulation is kept in the MIHF unit of current service Network Access Point of mobile node, the described failure that connects is:
The current service Network Access Point of mobile node is received from the switching that comprises the handoff failure parameter of objective network access point and is carried out response message.
10, method according to claim 9 is characterized in that, described once more with described around do not set up in the information of neighbor networks access point the objective network access point that is connected connect into:
The name a person for a particular job switching that comprises the parameter of failing of the current service network insertion of mobile node is carried out response message and is sent to mobile node, mobile node sends message to its current service Network Access Point, described current service Network Access Point once more with described around do not set up the objective network access point that is connected in the information of neighbor networks access point and connected.
11, according to claim 6,8 or 10 described methods, it is characterized in that, further comprise:
Comprise counter, write down the frequency of failure that connects,, then stop switching when the frequency of failure that connects surpasses predetermined threshold.
12, according to claim 6,8 or 10 described methods, it is characterized in that, further comprise:
Comprise timer, the time that record connects, surpass predetermined threshold and not successful connection when the time that connects, then stop switching.
13, method according to claim 1 is characterized in that, further comprises:
After the MIHF unit of mobile node and objective network access point connected, the former Network Access Point of mobile node was to objective network access point forwarding cache data, and mobile node starts registration process, and the former Network Access Point of mobile node is removed former link.
14, device for switching between a kind of heterogeneous wireless communication system is characterized in that, comprising:
Switch unit is used to make and switches decision and notify acquiring unit;
Acquiring unit is used to obtain the mobile node feature and the ability information of neighbor networks on every side;
Memory cell is used to store the information that acquiring unit obtains;
Linkage unit is used for connecting with memory cell objective network access point; After connection failure, do not set up the objective network access point that is connected and connected once more with in the objective network access point tabulation.
15, device according to claim 14 is characterized in that, also comprises:
Tabulation generation unit, the information that is used to obtain memory cell generate and contain objective network access point network type, objective network access point Media Access Control Address, objective network access point priority parameters and according to the tabulation of prioritization; It is the highest and do not set up the objective network access point that connects and connect that described linkage unit also is used for obtaining current priority from the tabulation generation unit.
16, device according to claim 15 is characterized in that, also comprises:
Counter unit is used for writing down the frequency of failure that connects;
The counting judgement unit is used to differentiate when the frequency of failure that connects of counter unit record surpasses predetermined threshold, and the notice linkage unit stops connecting.
17, device according to claim 15 is characterized in that, also comprises:
Timer unit is used for record and connects the time;
The timing judgement unit is used to differentiate when the time that connects of timer unit record surpasses predetermined threshold, and the notice linkage unit stops connecting.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100903884A CN101102584A (en) | 2006-07-05 | 2006-07-05 | A method and device for switching between isomerous wireless communication systems |
| PCT/CN2007/070223 WO2008014698A1 (en) | 2006-07-05 | 2007-07-03 | A method and a device for handover between the heterogenous wireless communication systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100903884A CN101102584A (en) | 2006-07-05 | 2006-07-05 | A method and device for switching between isomerous wireless communication systems |
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| CN101102584A true CN101102584A (en) | 2008-01-09 |
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| CNA2006100903884A Pending CN101102584A (en) | 2006-07-05 | 2006-07-05 | A method and device for switching between isomerous wireless communication systems |
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| WO (1) | WO2008014698A1 (en) |
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| CN101583159B (en) * | 2008-05-12 | 2011-04-06 | 华为技术有限公司 | Method and device for realizing different network switching |
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