CN100531437C - Method for obtaining supported service information by independent medium switching functional entity - Google Patents
Method for obtaining supported service information by independent medium switching functional entity Download PDFInfo
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- CN100531437C CN100531437C CNB2006100583778A CN200610058377A CN100531437C CN 100531437 C CN100531437 C CN 100531437C CN B2006100583778 A CNB2006100583778 A CN B2006100583778A CN 200610058377 A CN200610058377 A CN 200610058377A CN 100531437 C CN100531437 C CN 100531437C
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Abstract
The method comprises: a media-independent switch function entity enquires the service information supported by low level entity; according to the enquiry result, the media-independent switch function entity provides the service information for the upper level entity; wherein, said service information can be a command service information, or event service information and command service information.
Description
Technical field
The present invention relates to moving communicating field, when being particularly related in a kind of heterogeneous network the command service information supported when upper layer entity desire inquiry media-independent handoff functionality (MIHF:Media Independent Handover Function) entity and Event Service information, the MIHF entity is known the order supported and the method for Event Service information; And a kind of upper layer entity is to the querying method of the information on services of lower layer entities support.
Background technology
Development of Communication Technique is maked rapid progress, and various new network technologies constantly occur, and the switching and the roaming problem that how to solve between existing heterogeneous network get very outstanding.In order to solve the user at present IEEE (Institute of Electrical and Electronics Engineers; Institute of Electrical and Electric Engineers) 802.11, IEEE 802.15, IEEE 802.16,3GPP (3th GenerationPartnership Project; Third generation co-operative project), 3GPP2 (3th GenerationPartner-ship Project 2; Be engaged in the International Standards Organization of CDMA2000 3G (Third Generation) Moblie research on standard) etc. the roaming switching problem between the communication system, IEEE 802 wireless working groups have set up IEEE802 switches seminar, definite designation afterwards is IEEE 802.21 working groups, its objective is and make client device best network connection type and access point of energy automatic selectivity price ratio when internetwork roaming, and can need not realize seamless switching under the situation of user intervention, strengthen the user experience of mobile device by supporting the switching between heterogeneous network.
Wherein, 802.21 protocol coverage comprise:
A. defined a kind of mobile node (MN) framework of transparent continuous sex service can be provided when the link layer of isomery switches, the mobility management protocol stack of this framework to support in the network element to switch.802.21 agreement does not comprise framework realization details and the first-selected guidance that realizes.
B. in the mobility management protocol stack, define one group and switched relevant function and new entity, media-independent handoff functionality (MIHF:Media Independent Handover Function).
C. defined extra media interviews controls (MAC:Media Access Control) layer Service Access Point (SAPs:Service Access Point) and relevant primitive, helped to gather link layer information and control link behavior when switching at every kind of specific access technology.
D. defined the irrelevant Service Access Point (SAPs) and the relevant primitive that inserts MIHF of a group media, comprised:
1) media-independent service provides information model and information bank so that formulate handover decisions effectively.
2) media-independent command service is used for user's control of giving an order and switches relevant link behavior.
3) media-independent Event Service comprises incident and trigger that local and remote interface produces.
MIHF is defined as providing the logical layer in the mobility management protocol stack that moves the mobile node supported and network element, plays auxiliary and impetus in the handover decisions process.The upper strata of MIH is carried out handover decisions and is carried out link selection according to input and context from MIH; The common-denominator target of MIHF is to simplify the identification and the effectively discovery of handover information of switching occurrence condition.MIHF provides high-rise abstract service, and one group of interface that defines is provided, and the service primitive that these interfaces expose is independent of concrete access technology; MIHF communicates by the relevant interface of specific access technology and the mobility management protocol stack of low layer, is illustrated in figure 1 as MIHF position and key service schematic diagram.
The seamless switching of terminal between heterogeneous network mainly assisted and promote to independent medium switching functional entity by media-independent Event Service, media-independent command service and media-independent service, reduce switching delay and loss of data, strengthens user's experience.In the prior art, upper layer entity at first will be known event information and the command information that lower layer entities is supported, and then takes corresponding strategy according to these information.As shown in Figure 2, in the prior art to the querying flow figure of local event information and command information.
Fig. 2 has described the prior art event information supported of entity (MIH User) inquiry lower layer entities and the flow process of command information at the middle and upper levels.At first, upper layer entity is inquired about Event Service information and the command service information that the MIHF entity is supported by MIH ability discovery request (MIH_Capability_Discover.request) primitive to the MIHF entity; The MIHF entity is found the Event Service information that request (Link_Event_Discover.request) primitive is supported to lower layer entities inquiry lower layer entities by link event again, lower layer entities finds to confirm that by link event the Event Service information that (Link_Event_Discover.confirm) supports it reports the MIHF entity, and the MIHF entity reports upper layer entity (MIH User) to the Event Service information of MIHF entity support and command service information by MIH ability discovery response (MIH_Capability_Discover.response) again.
In the prior art, upper layer entity (MIH User) wishes to inquire about Event Service information and the command service information that the MIHF entity is supported by MIH_Capability_Discover.request primitive.For the Event Service information that the MIHF entity is supported, the MIHF entity can obtain by Link_Event_Discover.request and Link_Event_Discover.confirm primitive.
But,, do not illustrate by which kind of mode to obtain, original M IHF entity is not know that it should provide those command service information to upper strata (MIH User) on earth obviously in the prior art for the command service information that the MIHF entity is supported.Because the person of sending of order, promptly the MIHF entity must be known the recipient of order, and promptly whether lower layer entities has the function of carrying out this order and decide the order person of sending whether to support this order.So the MIHF entity must be inquired about exectorial lower layer entities earlier, could report the command service information of MIHF entity support then to upper layer entity according to Query Result.For example: have only when lower layer entities to have when carrying out the ability relevant with scan for networks order (MIH_Scan order), MI HF entity can be to the provide support information of MIH_Scan order of upper layer entity, if lower layer entities is not supported this order, the MIHF entity should be to the provide support information of this order of upper layer entity so.
Summary of the invention
In view of problems of the prior art, when the object of the present invention is to provide in a kind of heterogeneous network the command service information supported when upper layer entity desire inquiry independent medium switching functional entity and Event Service information, the MIHF entity is known the order supported and the method for Event Service information; And a kind of upper layer entity is to the querying method of the information on services of lower layer entities support.Make the MIHF entity can know the command service information that it is supported, and can notify upper layer entity command service information that it is supported and Event Service information exactly, thereby promote the switching of terminal in heterogeneous network effectively.
The invention provides independent medium switching functional entity in a kind of heterogeneous network and know the method for the information on services of being supported, comprise step:
The information on services that independent medium switching functional entity inquiry lower layer entities is supported;
Judge the information on services that independent medium switching functional entity provides for upper layer entity according to Query Result;
Wherein, described information on services is command service information or is Event Service information and command service information.
When described information on services was command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprised step:
Independent medium switching functional entity adopts link command to find the command service information that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link command is found request primitive, finds to confirm that by link command primitive returns the command service information that this lower layer entities is supported.
When described information on services was Event Service information and command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprised step:
Independent medium switching functional entity sends Event Service information and the command service information that link capability finds that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link capability is found request primitive, finds to confirm that by link capability primitive returns Event Service information and the command service information that this lower layer entities is supported.
The present invention also provides a kind of heterogeneous network querying method of entity information on services that lower layer entities is supported at the middle and upper levels, it is characterized in that, comprises step:
The information on services that upper layer entity inquiry independent medium switching functional entity is supported;
Independent medium switching functional entity is known the information on services that it is supported;
The information on services that independent medium switching functional entity will be known reports upper layer entity; Wherein said information on services is command service information or is command service information and Event Service information.
Described upper layer entity is inquired about the information on services that independent medium switching functional entity is supported by sending the media independent handoff aware request primitive.
Described independent medium switching functional entity is known the information on services that it is supported, comprises step:
The information on services that independent medium switching functional entity inquiry lower layer entities is supported;
Judge the information on services that independent medium switching functional entity provides for upper layer entity according to Query Result.
When described information on services was command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprised step:
Independent medium switching functional entity adopts link command to find the command service information that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link command is found request primitive, finds to confirm that by link command primitive returns the command service information that this lower layer entities is supported.
When described information on services was Event Service information and command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprised step:
Independent medium switching functional entity sends Event Service information and the command service information that link capability finds that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link capability is found request primitive, finds to confirm that by link capability primitive returns Event Service information and the command service information that this lower layer entities is supported.
The information on services that independent medium switching functional entity will be known by the media independent handoff aware response primitive reports described upper layer entity.
Beneficial effect of the present invention is, make the MIHF entity know the command service information that it is supported, and can accurately notify upper layer entity command service information that it is supported and Event Service information, thereby more effectively promote the switching rate of terminal in heterogeneous network.
Description of drawings
Fig. 1 is MIHF position and key service schematic diagram;
Fig. 2 is to the querying flow figure of local event information on services and command service information in the prior art;
Fig. 3 is the embodiment of the invention entity command service information that lower layer entities is supported and the querying flow figure of Event Service information at the middle and upper levels;
Fig. 4 is an alternative embodiment of the invention entity command service information that lower layer entities is supported and the querying flow figure of Event Service information at the middle and upper levels.
Embodiment
It is following that the present invention is described in detail with reference to accompanying drawing.
When the invention provides the information on services of supporting when upper layer entity desire inquiry independent medium switching functional entity in a kind of heterogeneous network, the MIHF entity is known the method for the information on services of being supported; And the querying method that the information on services that a kind of upper layer entity supports lower layer entities is provided.
Wherein, independent medium switching functional entity knows that the method for the information on services of being supported comprises step:
The information on services that independent medium switching functional entity inquiry low layer (Lower Layer) entity is supported;
Judge the information on services that independent medium switching functional entity provides for upper layer entity according to Query Result;
Wherein, described information on services is command service information or is Event Service information and command service information.
As shown in Figure 3, as upper layer entity (High Layer), during the ability that is MIH user by MIH ability discovery request (MIH_Capability_Discover.request) primitive inquiry MIHF entity, the MIHF entity is carried out this and is asked to inquire about the command service information that lower layer entities is supported.That is, when described information on services was command service information, the command service information that MIHF entity inquiry lower layer entities is supported comprised step:
The MIHF entity adopts link command to find the command service information that request (Link_Command_Discover.request) primitive inquiry lower layer entities is supported;
When lower layer entities is received this Link_Command_Discover.request primitive, find to confirm that by link command (Link_Command_Discover.confirm) primitive returns the command service information that this lower layer entities is supported immediately.Wherein, described command service information is command service tabulation, and is as shown in table 1.
Described MIHF entity carries out respective handling with the information of returning, and is the command service information that upper layer entity was provided to judge this MIHF entity.
In the present embodiment, Link_Command_Discover.request primitive is used to provide the MIHF entity inquiry command service information that lower layer entities is supported.The primitive semanteme:
Link_Command_Discover.request(
)；
Link_Command_Discover.confirm primitive is in order to return the command service information list that lower layer entities can be carried out.The primitive semanteme:
Link_Command_Discover.confirm(
SupportedCommandList
)
Table 1
| Title (Name) | Type (Type) | Effective range (Valid Range) | (Description) is described |
| The command list (CLIST) of supporting (SupportedCommandList) | Command id set (Set of Command Ids) | N/A | The command list (CLIST) that link layer can be carried out (List of link layer commands supported by the link layer) |
In the foregoing description, same as the prior art for the method for MIHF entity query event information on services, repeat no more herein.
The command service information that upper layer entity of the present invention is supported lower layer entities and the querying method of Event Service information are described when the MIHF entity adopts incident that said method knows that it is supported and command service information with reference to accompanying drawing 3.
At first, upper layer entity (High Layer), promptly MIH user is by MIH_Capability_Discover.request primitive initiated event and command service information inquiring request, with the ability of inquiry MIHF entity;
The MIHF entity is carried out this and is asked to inquire about incident and the command service information that lower layer entities is supported, incident and command service information to know that it is supported comprise step:
The MIHF entity adopts link event to find incident and command service information that request (Link_Event_Discover.request) and link command discovery request (Link_Command_Discover.request) primitive inquiry lower layer entities are supported;
When lower layer entities is received Link_Event_Discover.request and Link_Command_Discover.request primitive, find to confirm that by link event (Link_Event_Discover.confirm) and link command discovery affirmation (Link_Command_Discover.confirm) primitive return incident and the command service information that this lower layer entities is supported immediately;
Described MIHF entity is handled incident and the command service information returned accordingly, judges incident and command service that it can provide for upper layer entity;
At last, described MIHF entity responds the incident of its support and command service information the relevant parameter of (MIH_Capability_Discover.response) primitive by the MIH ability discovery, be that SupportedEventList and SupportedCommandList report upper layer entity, i.e. MIH user.
As shown in Figure 4, as upper layer entity (High Layer), during the ability that is MIH user by MIH ability discovery request (MIH_Capability_Discover.request) primitive inquiry MIHF entity, the MIHF entity is carried out this and is asked to inquire about Event Service information and the command service information that lower layer entities is supported.That is, when described information on services is Event Service information and command service information, incident and command service information that MIHF entity inquiry lower layer entities is supported, incident and command service information to know that it is supported comprise step:
The MIHF entity adopts link capability to find Event Service information and command service information that request (Link_Capability_Discover.request) primitive inquiry lower layer entities is supported;
When lower layer entities is received this Link_Capabliity_Discover.request primitive, find to confirm that by link capability (Link_Capability_Discover.confirm) primitive returns incident and the command service information that this lower layer entities is supported immediately.Wherein, described incident and command service information are an incident and command service tabulation, and is as shown in table 2.
Described MIHF entity carries out respective handling with the information of returning, and is incident and the command service information that upper layer entity was provided to judge this MIHF entity.
In the present embodiment, Link_Capability_Discover.request and Link_Capability_Discover.confirm primitive a pair of new primitive for increasing, therefore the function that has wherein comprised primitive Link_Event_Discover.request of the prior art and Link_Event_Discover.confirm has omitted Link_Event_Discover.request and Link_Event_Discover.confirm primitive.Wherein,
Link_Command_Discover.request primitive is used to provide the inquiry of MIHF entity command service information and Event Service information that lower layer entities is supported.The primitive semanteme:
Link_Capability_Discover.request(
)
Link_Capability_Discover.confirm primitive is used to return order and the Event Service tabulation that lower layer entities can be carried out, as table 2.The primitive semanteme:
Link_Command_Discover.confirm(
SupportedCommandList
SupportedEventList
)
Table 2
| Title (Name) | Type (Type) | Effective range (Valid Rang e) | (Description) is described |
| The command list (CLIST) of supporting (SupportedCommand List) | Command id set (Set of Command Ids) | N/A | The command list (CLIST) that link layer can be carried out (List of link layer commands supported by the link layer) |
| The list of thing of supporting (Suppor tedEvent List) | Event identifier set (Set of Event I Ds) | N/A | The list of thing (List of link layer Event supported by the link layer) that link layer is supported |
The command service information that upper layer entity of the present invention is supported lower layer entities and the querying method of Event Service information are described when the MIHF entity adopts incident that method shown in Figure 4 knows that it is supported and command service information with reference to accompanying drawing 4.
At first, upper layer entity (High Layer), promptly MIH user is by MIH_Capability_Discover.request primitive initiated event and command service information inquiring request, with the ability of inquiry MIHF entity;
The MIHF entity is carried out this and is asked to inquire about incident and the command service information that lower layer entities is supported, incident and command service information to know that it is supported comprise step:
The MIHF entity adopts link capability to find incident and command service information that request (Link_Capability_Discover.request) primitive inquiry lower layer entities is supported;
When lower layer entities is received Link_Capability_Discover.request primitive, find to confirm that by link capability (Link_Capability_Discover.confirm) primitive returns incident and the command service information that this lower layer entities is supported immediately;
Described MIHF entity is handled incident and the command service information returned accordingly, judges incident and command service that it can provide for upper layer entity;
At last, described MIHF entity responds the incident of its support and command service information the relevant parameter of (MIH_Capability_Discover.response) primitive by the MIH ability discovery, be that SupportedEventList and SupportedCommandList report upper layer entity, i.e. MIH user.
Pass through the foregoing description, make independent medium switching functional entity know the command service information that it is supported, and can accurately notify upper layer entity command service information that it is supported and Event Service information, thereby more effectively promote the switching of terminal in heterogeneous network.
The foregoing description only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (8)
1. independent medium switching functional entity is known and be it is characterized in that the method for the information on services of being supported in the heterogeneous network, comprises step:
The information on services that independent medium switching functional entity inquiry lower layer entities is supported;
Judge the information on services that independent medium switching functional entity provides for upper layer entity according to Query Result;
Wherein, described information on services is command service information or is Event Service information and command service information.
2. independent medium switching functional entity is known the method for the information on services of being supported in the heterogeneous network according to claim 1, it is characterized in that, when described information on services was command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprised step:
Independent medium switching functional entity adopts link command to find the command service information that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link command is found request primitive, finds to confirm that by link command primitive returns the command service information that this lower layer entities is supported.
3. independent medium switching functional entity is known the method for the information on services of being supported in the heterogeneous network according to claim 1, it is characterized in that, when described information on services is Event Service information and command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprises step:
Independent medium switching functional entity sends Event Service information and the command service information that link capability finds that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link capability is found request primitive, finds to confirm that by link capability primitive returns Event Service information and the command service information that this lower layer entities is supported.
4. the heterogeneous network querying method of entity information on services that lower layer entities is supported at the middle and upper levels is characterized in that, comprises step:
The information on services that upper layer entity inquiry independent medium switching functional entity is supported;
Independent medium switching functional entity is known the information on services that it is supported, comprising: the information on services that independent medium switching functional entity inquiry lower layer entities is supported; Judge the information on services that independent medium switching functional entity provides for upper layer entity according to Query Result;
The information on services that independent medium switching functional entity will be known reports upper layer entity; Wherein said information on services is command service information or is command service information and Event Service information.
5. heterogeneous network according to claim 4 is the querying method of entity information on services that lower layer entities is supported at the middle and upper levels, it is characterized in that described upper layer entity is inquired about the information on services that independent medium switching functional entity is supported by sending the media independent handoff aware request primitive.
6. heterogeneous network according to claim 4 is the querying method of entity information on services that lower layer entities is supported at the middle and upper levels, it is characterized in that, when described information on services was command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprised step:
Independent medium switching functional entity adopts link command to find the command service information that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link command is found request primitive, finds to confirm that by link command primitive returns the command service information that this lower layer entities is supported.
7. independent medium switching functional entity is known the method for the information on services of being supported in the heterogeneous network according to claim 4, it is characterized in that, when described information on services is Event Service information and command service information, the information on services that independent medium switching functional entity inquiry lower layer entities is supported comprises step:
Independent medium switching functional entity sends Event Service information and the command service information that link capability finds that request primitive inquiry lower layer entities is supported;
Lower layer entities is received when this link capability is found request primitive, finds to confirm that by link capability primitive returns Event Service information and the command service information that this lower layer entities is supported.
8. independent medium switching functional entity is known the method for the information on services of being supported in the heterogeneous network according to claim 4, it is characterized in that the information on services that independent medium switching functional entity will be known by the media independent handoff aware response primitive reports described upper layer entity.
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Non-Patent Citations (2)
| Title |
|---|
| Directions in Media Independent Handover. Michael G. Williams.IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences,Vol.E88-A No.7. 2005 |
| Directions in Media Independent Handover. Michael G. Williams.IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences,Vol.E88-A No.7. 2005 * |
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