CN101272321B - Method for selecting mobile IP mode in wireless network, wireless network and decision entity - Google Patents

Method for selecting mobile IP mode in wireless network, wireless network and decision entity Download PDF

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CN101272321B
CN101272321B CN2007101451291A CN200710145129A CN101272321B CN 101272321 B CN101272321 B CN 101272321B CN 2007101451291 A CN2007101451291 A CN 2007101451291A CN 200710145129 A CN200710145129 A CN 200710145129A CN 101272321 B CN101272321 B CN 101272321B
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csn
asn
mode
capability
strategy
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CN101272321A (en
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梁文亮
顾亮
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Changzhou Xiaoguo Information Service Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The invention discloses a method for choosing a mobile IP mode in a wireless network, a wireless network and a decision-making entity, which uses strategy and ability of a comprehensive network side and an MS side to choose the mobile IP mode. The method of the invention comprises that: a decision node obtains the strategies and abilities of the network side and a mobile station MS and chooses one strategy and ability from the intersection of the strategies and abilities of the network side and the mobile station MS; the decision node correspondingly chooses the mobile IP mode according to the chosen strategy and ability and notifies the network sides and/or the MS. The wireless network of the invention comprises the network side, the mobile station MS and a decision-making unit used for obtaining the strategy and ability of the network side and the MS, choosing one strategy and ability from the intersection of the strategy and ability of the network side and the MS, correspondingly choosing a mobile IP mode according to the chosen strategy and ability and notifying the chosen mobile IP mode to the network sides and/or the MS.

Description

Method for selecting mobile IP mode in wireless network, wireless network and decision entity
Technical Field
The present invention relates to the field of communications, and in particular, to a method for selecting a mobile IP mode in a wireless network, and a decision entity.
Background
Currently, on a WiMax wireless network (not limited to a WiMax network), there may be different MSs and different user requirements for the MS side. There are terminals that do not support the MIP6 mode and users that select the CMIP6/PMIP 6/simple IP6 mode for certain reasons. For the network side, there may be specific requirements on PMIP6 and CMIP6 modes, such as: the operator can specify a certain MS according to the characteristics of the operator or the characteristics of the user, or all MSs can only use PMIP6 or simple IP6 mode; another example is: since the CMIP6 also needs the capability coordination of the terminal, the network side cannot limit the MS which does not support CMIP6 to adopt the CMIP6 mode; for another example: the operator can make a policy according to the characteristics of the operator or the characteristics of the user so as to determine the priority of each mobile IP mode.
However, currently, in IPv4, the network side distinguishes whether the mobile IP mode selected by the MS is the CMIP4 mode or the PMIP4 mode by whether the MS first initiates a DHCP procedure or an MIP procedure. The provisions in IPv4 require the standard protocol stack of the MS: the DHCP and MIP protocols need to be realized in a coupling mode, and are not consistent with the condition of the MS widely deployed at present, and the DHCP and MIP of the MS are realized by independent protocols at present. And the policies and capabilities of the network side are not fully considered.
Currently in IPv6, there is no mechanism to negotiate three mobile IP modes on IPv6 (i.e., CMIP6, PMIP6 and simple IP6), and hybrid mode (e.g., MS supports MIP6 and is active, while the network side also provides PMIP 6).
In summary, the prior art does not consider the policies and capabilities of the network side and the MS side comprehensively, so the selected mobile IP mode cannot guarantee the MS to access successfully.
Disclosure of Invention
The embodiment of the invention provides a method for selecting a mobile IP mode in a wireless network, the wireless network and a decision entity, which are used for selecting the mobile IP mode by integrating the strategies and the capabilities of a network side and an MS side.
The method of the embodiment of the invention comprises the following steps: the decision point obtains the strategies and the capabilities of the network side and the mobile station MS, and selects one strategy and capability from the intersection of the strategies and the capabilities of the network side and the mobile station MS; the decision point correspondingly selects the mobile IP mode according to the selected strategy and capability and informs the network side and/or the MS.
The wireless network of the embodiment of the invention comprises: a network side, a mobile station MS, and a decision unit,
the decision unit is used for acquiring the strategies and the capabilities of the network side and the MS, selecting one strategy and one capability from the strategy and capability intersection of the network side and the MS, correspondingly selecting a mobile IP mode according to the selected strategy and capability, and informing the network side and/or the MS of the selected mobile IP mode.
The decision entity of the embodiment of the invention comprises: an obtaining unit, configured to obtain a policy and capability of a mobile station MS and a network side; the strategy and ability selection unit is used for taking the intersection of the strategies and the abilities obtained by the obtaining unit and selecting one strategy and ability from the intersection; a mobile IP mode selection unit for selecting a mobile IP mode according to the strategy and the capability selected by the strategy and capability selection unit; and a notifying unit for notifying the network side and/or the MS of the mobile IP mode selected by the mobile IP mode selecting unit.
In the embodiment of the invention, after the strategy and the capability of the network side and the MS are obtained by the decision point, the strategy and the capability intersection are taken by the decision point, and one strategy and capability are selected from the intersection; and then the decision point correspondingly selects the mobile IP mode according to the selected strategy and capability and informs the network side and/or the MS.
Because the embodiment of the invention comprehensively considers the strategies and the capabilities of the network side and the MS (namely, the intersection of the strategies and the capabilities), the mobile IP mode selected according to the strategies and the capabilities after comprehensive consideration can ensure the successful access of the MS.
Drawings
FIG. 1 is a flow chart of method steps for an embodiment of the present invention;
fig. 2 is a schematic diagram of a wireless network according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a decision entity according to an embodiment of the present invention;
fig. 4 is a signaling flow diagram of embodiment 1 of the present invention;
FIG. 5 is a signaling flow chart of embodiment 2 of the present invention;
fig. 6 is a signaling flow chart of embodiment 3 of the present invention.
Detailed Description
In order to select a mobile IP mode by comprehensively considering policies and capabilities of a network side and an MS, thereby ensuring that all MSs with standard protocol stacks can successfully access, an embodiment of the present invention provides a method for selecting a mobile IP mode in a wireless network, which includes the following main steps, as shown in fig. 1:
and S1, the decision point obtains the strategies and the capabilities of the network side and the MS.
The network side at least comprises one of the following networks: an access service network ASN, a home connection service network H-CSN and a visiting place connection service network V-CSN.
The decision point is one of MS, ASN and H-CSN. The following describes the process of using MS, ASN, H-CSN as decision point to obtain the strategy and capability of MS, ASN, H-CSN and V-CSN. The policies and capabilities include, but are not limited to, CMIP6 mode, PMIP6 mode, simple IP6 mode, and hybrid mode.
1.1, the decision point is MS, and the following describes one by one how ASN, H-CSN and V-CSN send their policies and capabilities to MS.
1.1.1, the H-CSN sends the policies and capabilities of the H-CSN to the MS by one of the following ways:
mode 101, in the EAP (Extensible Authentication Protocol) access Authentication process, RADIUS/Diameter or EAP message carries the policy and capability of H-CSN, and sends it to MS (it can be directly sent to MS or forwarded via ASN).
In the mode 102 and the DHCP (Dynamic Host Configuration Protocol) process, the DHCP server of the H-CSN carries the policy and capability of the H-CSN in the DHCP message and sends the DHCP message to the MS.
In the mode 103 and IKE (Internet Key Exchange protocol) bootstrap process, the policy and capability of the H-CSN are sent to the MS through Configuration Payload (a protocol packet format used when negotiating Configuration information at both ends of interaction).
1.1.2 sending the policies and capabilities of the V-CSN to the MS by one of:
and the H-CSN sends the strategy and the capability of the H-CSN and the strategy and the capability of the V-CSN to the decision point in the EAP access authentication process. Or, when the RADIUS/Diameter or EAP message sent by the H-CSN to the MS through the method 101 passes through the V-CSN, the AAA proxy of the V-CSN adds the policy and capability of the V-CSN to the message, and sends the message to the MS. Or, the strategy and capability of the V-CSN can be configured on the ASN in advance, and then the ASN forwards the strategy and capability to the MS.
1.1.3, after the ASN obtains the strategies and the capabilities of the H-CSN and the V-CSN, the ASN makes a pre-decision according to the strategies and the capabilities of the ASN, the H-CSN and/or the V-CSN, and sends the strategy and the capability set of the pre-decision to the MS. The pre-decision is that the ASN takes the strategy and capability intersection of the ASN, the H-CSN and/or the V-CSN, or the ASN obtains the strategy and capability intersection after synthesizing the known strategy and capability (applied to the scene of direct IKE and HCSN interaction). Or the ASN directly forwards the strategies and the capabilities of the H-CSN and the V-CSN to the MS and sends the strategies and the capabilities of the ASN to the MS.
The ASN sends the policy and capability set of the pre-decision, or the policies and capabilities of the H-CSN, V-CSN and ASN to the MS by one of the following methods:
mode 111, EAP access authentication procedure, sending to MS through EAP over PKM mode (the EAP-over-PKM is from MS to BS (policy and capability information may be placed in Payload of EAP, or may be appended to PKM message), and the other two segments are from BS to GW, and from GW to V-CSN/H-CSN.
In the mode 112 and DHCP process, the DHCP proxy or Relay of the ASN sends to the MS through a DHCP message.
Mode 113, in the router discovery process, the RA message is broadcast by the router and sent to the MS.
Mode 114, signaling between ASN-GW and BS, and MAC signaling between BS and MS are sent to MS;
mode 115, sending to the MS via neighbor broadcast NA messages.
1.2, the decision point is ASN, and the following describes how the MS, the H-CSN and the V-CSN send the strategies and the capabilities thereof to the ASN one by one.
1.2.1, the H-CSN sends the strategy and the capability of the H-CSN to the ASN by one of the following ways:
mode 101, in the EAP access authentication process, the RADIUS/Diameter or EAP message carries the policy and capability of the H-CSN and sends it to the ASN.
In the mode 102 and the DHCP process, the DHCP server of the H-CSN carries the strategy and the capability of the H-CSN in the DHCP message and sends the strategy and the capability to the ASN.
In the mode 103 and the IKE bootstrap process, the strategy and the capability of the H-CSN are sent to the ASN through Configuration Payload.
1.2.2, sending the strategy and the capability of the V-CSN to the ASN by one of the following ways:
and the H-CSN sends the strategy and the capability of the H-CSN and the strategy and the capability of the V-CSN to the decision point in the EAP access authentication process. Or, when the RADIUS/Diameter message sent by the H-CSN to the ASN through the method 101 passes through the V-CSN, the AAA proxy of the V-CSN adds the policy and capability of the V-CSN to the message, and sends the message to the ASN. Alternatively, the policies and capabilities of the V-CSN can be pre-configured on the ASN.
1.2.3, the MS sends the strategy and the capability of the MS to the ASN by one of the following modes:
mode 131, in the router discovery process, sending RS message to ASN through router request;
in the method 132 and the DHCP process, the DHCP message is explicitly or implicitly sent to the ASN;
the mode 133, signaling between the ASN-GW and the BS, and MAC signaling between the BS and the MS are sent to the ASN;
the method 134, in the EAP access authentication process, sends the EAP over PKM message to the ASN;
the method 135 sends the RS message to the ASN through neighbor solicitation.
1.3, the decision point is H-CSN, MS, ASN and V-CSN send strategy and ability to H-CSN through EAP over PKM mode in EAP access authentication process.
In the transmission process of the strategy and the capability, after the ASN obtains the strategy and the capability of the MS, an NAS (Network Access Server) of the ASN can make a pre-decision according to the strategy and the capability of the ASN and/or the MS, and sends the pre-decision strategy and the capability set to the H-CSN. The pre-decision is that the NAS of the ASN obtains the strategy and capability intersection of the ASN and/or the MS, or the NAS of the ASN obtains the strategy and capability intersection after integrating the known strategy and capability of the ASN.
In the transmission process of the strategy and the capability, after the V-CSN obtains the strategy and the capability of the MS and the ASN, the AAA agent of the V-CSN makes a pre-decision according to the strategy and the capability of the V-CSN, the ASN and/or the MS, and sends the set of the pre-decision strategy and the capability to the H-CSN. Wherein the pre-decision is that the AAA proxy of the V-CSN takes the strategy and capability intersection of the V-CSN, the ASN and/or the MS, or the AAA proxy of the V-CSN synthesizes the known strategy and capability to obtain the strategy and capability intersection.
S2, taking the strategy and ability intersection from the decision point, and selecting one strategy and ability from the intersection.
And 2.1, the corresponding decision point 1.1 is MS, after the MS obtains the strategies and the capabilities of the ASN, the H-CSN and the V-CSN (including the intersection of the strategies and the capabilities of the pre-decision), the obtained strategies and the capabilities and the strategies and the capabilities of the MS are intersected, and one strategy and capability are selected from the intersection.
And 2.2, the corresponding 1.2 decision point is ASN, after the ASN obtains the strategies and the capabilities of the MS, the H-CSN and the V-CSN (including the intersection of the strategies and the capabilities of the pre-decision), the obtained strategies and the capabilities and the strategies and the capabilities of the ASN are intersected, and one strategy and capability are selected from the intersection.
And 2.3, after the H-CSN obtains the strategies and the capabilities of the MS, the ASN and the V-CSN (including the intersection of the strategies and the capabilities of the pre-decision) corresponding to the 1.3 decision point, taking the intersection of the obtained strategies and the capabilities and the strategies and the capabilities of the H-CSN, and selecting one strategy and capability from the intersection.
S3, the decision point selects the mobile IP mode according to the selected strategy and capability.
That is, according to the selected policy and capability, a mobile IP mode is corresponded to which conforms to the relevant policy and is supported by the MS, the ASN, the H-CSN, and the V-CSN.
S4, the decision point informs the network side and/or the MS.
4.1, corresponding to the 1.1 decision point being MS, MS notifies ASN, H-CSN and V-CSN of the selected mobile IP mode by one of the following means:
mode 121, notification during MIP registration.
Mode 122, in the DHCP procedure, explicit or implicit notification is performed through a DHCP message. For example: and sending different DHCP message notifications, wherein DHCP-information-request represents CMIP, and DHCP-Discovery represents PMIP.
Mode 123, signaling between the BS and the ASN-GW, and MAC signaling between the BS and the MS.
Mode 124, in the router discovery process, requesting RS message notification by the router;
mode 125, notification by neighbor solicitation NS message.
4.2, corresponding to the 1.2 decision point being ASN, the ASN notifies the MS, the H-CSN and the V-CSN of the selected mobile IP mode by one of the following modes:
4.2.1, the ASN informs the MS of the selected Mobile IP mode by one of the following means:
the method 141 notifies the MS in an EAP over PKM manner during the EAP access authentication.
In the mode 142 and DHCP process, the DHCP proxy or Relay of the ASN notifies the MS through a DHCP message.
Mode 143, in the router discovery process, the MS is notified by the router broadcast RA message.
The method 144, notifying the MS through the signaling between the access service network gateway ASN-GW and the base station BS, and the MAC signaling between the BS and the MS;
the method 145 informs the MS via neighbor broadcast NA messages.
4.2.2, the ASN notifies the H-CSN and the V-CSN of the selected Mobile IP mode by one of the following ways: notifying the H-CSN and the V-CSN of the selected mobile IP mode: ASN informs H-CSN and V-CSN in PMIP registration request process, or MS obtains selected mobile IP mode and informs H-CSN and V-CSN in CMIP registration request process.
4.3, corresponding to 1.3 decision points being H-CSN, H-CSN informs MS, SN and V-CSN of the selected Mobile IP mode by one of the following ways:
4.3.1, the H-CSN informs the MS of the selected Mobile IP mode by one of the following means:
mode 151 informs the MS directly in the EAP procedure.
The method 152 notifies the ASN in the EAP process, and then the ASN notifies the MS in the EAP over PKM mode.
In the mode 153, the ASN is notified in the EAP process, and then the ASN notifies the MS through a DHCP message in the DHCP process.
The method 154 notifies the ASN in the EAP process, and then the ASN notifies the MS by the router broadcast RA message in the router discovery process.
Mode 155, the ASN is notified in the EAP process, and then the ASN notifies the MS through neighbor broadcast NA messages.
Mode 156, notify ASN in EAP process, notify MS through signaling between access service network gateway ASN-GW and base station BS, and signaling between BS and MS.
4.3.2, H-CSN informs ASN and V-CSN of the selected Mobile IP mode by one of the following ways: informing the ASN and the V-CSN of the selected mobile IP mode: H-CSN informs ASN and V-CSN through EAP process; the selected mobile IP mode may be brought to the ASN and V-CSN in the above notification of the MS.
An embodiment of the present invention further provides a wireless network, as shown in fig. 2, including: a network side, a mobile station MS and a decision unit.
The decision unit is used for acquiring the strategies and the capabilities of the network side and the MS, selecting one strategy and one capability from the strategy and capability intersection of the network side and the MS, correspondingly selecting a mobile IP mode according to the selected strategy and capability, and informing the network side and/or the MS of the selected mobile IP mode. The network side at least comprises one of the following networks: an access service network ASN, a home connection service network H-CSN and a visiting place connection service network V-CSN. The decision unit is located in the MS, the ASN or the H-CSN.
An embodiment of the present invention further provides a decision entity, as shown in fig. 3, which includes: the system comprises an acquisition unit, a strategy and capability selection unit, a mobile IP mode selection unit and a notification unit which are connected in sequence.
And the obtaining unit is used for obtaining the strategies and the capabilities of the mobile station MS and the network side.
And the strategy and capability selection unit is used for taking the intersection of the strategies and the capabilities obtained by the obtaining unit and selecting one strategy and capability from the intersection.
And the mobile IP mode selection unit is used for correspondingly selecting the mobile IP mode according to the strategy and the capability selected by the strategy and capability selection unit.
And a notifying unit for notifying the network side and/or the MS of the mobile IP mode selected by the mobile IP mode selecting unit.
Further, if the decision entity is located in the MS, the obtaining unit is configured to obtain the policy and capability of the access service network ASN, the home connection service network H-CSN, and the visited connection service network V-CSN, in case that the policy and capability of the MS, ASN, H-CSN, and V-CSN need to be comprehensively considered and the selected mobile IP mode needs to be notified to the ASN, H-CSN, and V-CSN. And the strategy and capability selection unit is used for taking the intersection of the strategies and the capabilities obtained by the obtaining unit and selecting one strategy and capability from the intersection. And the mobile IP mode selection unit is used for correspondingly selecting the mobile IP mode according to the strategy and the capability selected by the strategy and capability selection unit. And a notifying unit for notifying the ASN, the H-CSN and the V-CSN of the mobile IP mode selected by the mobile IP mode selecting unit.
Further, if the decision entity is located in the entity of the ASN, the obtaining unit is configured to obtain the policy and capability of the mobile station MS, the home connection service network H-CSN, and the visited connection service network V-CSN, in case that the policy and capability of the MS, the ASN, the H-CSN, and the V-CSN need to be considered comprehensively and the selected mobile IP mode needs to be notified to the MS, the H-CSN, and the V-CSN. And the strategy and capability selection unit is used for taking the intersection of the strategies and the capabilities obtained by the obtaining unit and selecting one strategy and capability from the intersection. And the mobile IP mode selection unit is used for correspondingly selecting the mobile IP mode according to the strategy and the capability selected by the strategy and capability selection unit. And a notifying unit for notifying the MS, the H-CSN and the V-CSN of the mobile IP mode selected by the mobile IP mode selecting unit.
Further, if the decision entity is located in the H-CSN entity, the obtaining unit is configured to obtain the policy and capability of the mobile station MS, the access service network ASN, and the visited connectivity service network V-CSN in case that the policy and capability of the MS, the ASN, the H-CSN, and the V-CSN need to be considered comprehensively and the selected mobile IP mode needs to be notified to the MS, the ASN, and the V-CSN. And the strategy and capability selection unit is used for taking the intersection of the strategies and the capabilities obtained by the obtaining unit and selecting one strategy and capability from the intersection. And the mobile IP mode selection unit is used for correspondingly selecting the mobile IP mode according to the strategy and the capability selected by the strategy and capability selection unit. And a notifying unit for notifying the MS, the ASN and the V-CSN of the mobile IP mode selected by the mobile IP mode selecting unit.
This is described in detail below by means of 3 examples.
Example 1, decision point is MS. Referring to fig. 4, the method comprises the following steps:
step 1, in the network access process, the MS performs EAP authentication. And when the EAP authentication is successful, the H-CSN sends an Access-Accept message, wherein the message comprises the strategy and the capability of the H-CSN.
And step 2, the Access-Access message is added with the strategy and the capability of the V-CSN in the message through the V-CSN and the AAA proxy of the V-CSN, and is sent to the ASN.
Step 3, if MS initiates DHCP process first, ASN puts H-CSN, V-CSN and strategy and ability of ASN in DHCP-REPLY message and sends to MS; or may be sent to the MS in an EAP message that informs the MS of the successful authentication.
And 4, after obtaining the strategy and the capability, the MS makes a decision according to the strategy and the capability of the MS, and finally selects a mobile IP mode.
And step 5, after the DHCP interaction is completed, the MS informs the selected mobile IP mode to the ASN in the router request RS.
Step 6, if it is PMIP6 and ASN has not obtained home network prefix before, PBU/PBA procedure acquisition needs to be initiated. Then AR (Access Router) in ASN constructs Router broadcast message (including home network prefix), then sends Router broadcast message, the Router broadcast message can not make special indication to the network prefix, let MS think it is in H-CSN; if the indication information is added, it is required that the MS can recognize the indication information. In the case of CMIP 6/simple IP6, the router broadcasts a prefix that carries the home network assignment and the MS is used to generate a CoA or PoA. If the hybrid mode is CMIP6 and PMIP6, the ASN obtains the local network prefix and the home network prefix through the method, constructs a router broadcast message, wherein the message comprises the local network prefix and the home network prefix, and the router broadcast message carries indication information for distinguishing the local network prefix and the home network prefix.
Step 7 (optional step), when the home agent ha (home agent) receives the MIP registration Request, it can obtain the result of selection from the message, and notify the V-AAA (located in V-CSN) and/or H-AAA (located in H-CSN) in the Access-Request message; the default result for V-AAA/H-AAA is simple IP.
Example 2, the decision point is ASN. Referring to fig. 5, the method comprises the following steps:
step 1, in the network access process, the MS performs EAP authentication. And when the EAP authentication is successful, the H-CSN sends an Access-Accept message, wherein the message comprises the strategy and the capability of the H-CSN.
And step 2, the Access-Access message is added with the strategy and the capability of the V-CSN in the message through the V-CSN and the AAA proxy of the V-CSN, and is sent to the ASN.
And 3, the MS informs the strategy and the capability of the MS at the network side through a router request message RS.
And 4, after the ASN obtains the strategies and the capabilities, the ASN makes a decision according to the strategies and the capabilities of the ASN and finally selects a mobile IP mode.
Step 5, if it is PMIP6 and ASN has not obtained home network prefix before, PBU/PBA procedure acquisition needs to be initiated. Then AR in ASN constructs router broadcast message (containing home network prefix), then sends router broadcast message, the router broadcast message can make no special indication to network prefix, let MS think it is in H-CSN, if adding indication information, then MS is needed to be able to identify the indication information. In the case of CMIP 6/simple IP6, the router advertisement message carries a home network assigned prefix and the MS is used to generate a CoA or PoA. If the hybrid mode is CMIP6 and PMIP6, the ASN obtains the local network prefix and the home network prefix through the method, constructs a router broadcast message, wherein the message comprises the local network prefix and the home network prefix, and the router broadcast message carries indication information for distinguishing the local network prefix and the home network prefix.
Step 6 (optional step), when receiving the MIP registration Request, the home agent ha (home agent) may obtain the result of selection from the message, and notify the V-AAA (located in V-CSN) and/or the H-AAA (located in H-CSN) in the Access-Request message; the default result for V-AAA/H-AAA is simple IP.
Example 3, the decision point is ASN. Referring to fig. 6, the method comprises the following steps:
step 1, in the network access process, the MS performs EAP authentication. And when the EAP authentication is successful, the H-CSN sends an Access-Accept message, wherein the message comprises the strategy and the capability of the H-CSN.
And step 2, the Access-Access message is added with the strategy and the capability of the V-CSN in the message through the V-CSN and the AAA proxy of the V-CSN, and is sent to the ASN.
And 3, the MS informs the strategy and the capability of the MS to the network side through a DHCP message (DHCP-Information-Request/DHCP-Solicit).
And 4, after the ASN obtains the strategies and the capabilities, the ASN makes a decision according to the strategies and the capabilities of the ASN and finally selects a mobile IP mode.
Step 5, ASN sends DHCP-REPLY to MS, if it is PMIP or simple IP mode, DHCP message does not contain HA address; if the mode is CMIP mode, the DHCP message contains HA address information. If it is PMIP6 and the ASN has not previously obtained the home network prefix, then PBU/PBA procedure acquisition needs to be initiated. Then AR in ASN constructs router broadcast message (containing home network prefix), then sends router broadcast message, the message carries home network prefix, router broadcast message can not make special indication to network prefix, let MS think it is in H-CSN, if adding indication information, then need MS to be able to identify this indication information. In the case of CMIP 6/simple IP6, the router advertisement message carries a home network assigned prefix and the MS is used to generate a CoA or PoA. If the hybrid mode is CMIP6 and PMIP6, the ASN obtains the local network prefix and the home network prefix through the method, constructs a router broadcast message, wherein the message comprises the local network prefix and the home network prefix, and the router broadcast message carries indication information for distinguishing the local network prefix and the home network prefix.
Step 6 (optional step), when receiving the MIP registration Request, the home agent ha (home agent) may obtain the result of selection from the message, and notify the V-AAA (located in V-CSN) and/or the H-AAA (located in H-CSN) in the Access-Request message; the default result for V-AAA/H-AAA is simple IP.
In summary, since the embodiments of the present invention comprehensively consider the policies and capabilities of the MS, the ASN, the H-CSN, and the V-CSN (i.e. take the intersection of the policies and capabilities), the mobile IP mode selected according to the policies and capabilities after comprehensive consideration can ensure the successful access of the MS.
Further, the decision point in the embodiment of the present invention is located in the MS, ASN, or H-CSN, and for each location situation where the decision point is located, the embodiment of the present invention provides a scheme for other related networks and entities (MS) to send their policies and capabilities to the decision point. Moreover, different networks which need to participate in the decision, different locations of decision points, different selected mobile IP modes, policies and capabilities which may need to be considered comprehensively, and different networks and entities which need to know the selected mobile IP modes, are provided, so the manner of transmitting the policies and capabilities to the decision points and the manner of notifying the network side and/or the MS of the selected mobile IP mode by the decision points, which are provided by the embodiments of the present invention, may be combined correspondingly, and are within the scope of the present invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (20)

1. A method for selecting a mobile IP mode in a wireless network, comprising the steps of:
the decision point obtains the strategies and the capabilities of the network side and the mobile station MS, and selects one strategy and capability from the intersection of the strategies and the capabilities of the network side and the mobile station MS; the network side at least comprises one of the following networks: an access service network ASN, a home connection service network H-CSN and a visiting place connection service network V-CSN; the decision point comprises MS, ASN or H-CSN;
the decision point correspondingly selects a mobile IP mode according to the selected strategy and capability and informs a network side and/or an MS; and
after the ASN is indicated to acquire the selected mobile IP mode, the access router AR in the ASN constructs a router broadcast message according to the selected mobile IP mode.
2. The method of claim 1, wherein if the decision point is the MS, the policies and capabilities of the H-CSN are sent to the MS by one of:
mode 101, in the extensible authentication protocol EAP access authentication process, sending the policy and capability of the H-CSN to the MS;
102, sending the policy and capability of the H-CSN to the MS in the process of dynamic host configuration protocol DHCP;
the method 103 sends the policy and capability of the H-CSN to the MS during the internet key exchange protocol IKE bootstrapping.
3. The method of claim 2, wherein the H-CSN policy and capability and the V-CSN policy and capability are sent to the decision point during EAP access authentication; or, in the EAP access authentication process, when a message carrying the strategy and the capability of the H-CSN sent to the decision point passes through the V-CSN, adding the strategy and the capability of the V-CSN into the message and forwarding the message to the decision point; or the strategy and the capability of the V-CSN are configured on the ASN in advance and then forwarded to the decision point by the ASN.
4. The method of claim 1, wherein if the decision point is MS, the ASN makes a pre-decision according to the acquired H-CSN, V-CSN and/or its own policies and capabilities, and sends the pre-decision set of policies and capabilities to the MS; or,
ASN forwards strategy and capability of H-CSN and V-CSN to MS, and sends strategy and capability of ASN to MS.
5. The method of claim 4, wherein the ASN sends the pre-decided set of policies and capabilities, or the policies and capabilities of the H-CSN, V-CSN and ASN to the MS by one of:
mode 111, sending to MS in EAP access authentication process;
mode 112, in the DHCP process, send to the MS;
mode 113, in the router discovery process, sending the RA message to the MS by the router broadcast;
mode 114, signaling between ASN-GW and BS, and signaling between BS and MS are sent to MS;
mode 115, sending to the MS via neighbor broadcast NA messages.
6. The method of claim 1, wherein if the decision point is MS, the MS notifies the network side of the selected mobile IP mode by one of the following methods:
mode 121, notification during mobile IP registration;
mode 122, in the DHCP process, explicit or implicit notification is through DHCP message;
mode 123, signaling between the BS and the ASN-GW, and signaling between the BS and the MS;
mode 124, in the router discovery process, requesting RS message notification through a router;
mode 125, notification by neighbor solicitation NS message.
7. The method of claim 1, wherein if the decision point is an ASN, the H-CSN and/or the V-CSN sends its policies and capabilities to the ASN.
8. The method of claim 7, wherein the H-CSN sends the policies and capabilities of the H-CSN to the ASN during EAP access authentication.
9. The method of claim 8, wherein the H-CSN policy and capability and the V-CSN policy and capability are sent to a decision point during EAP access authentication; or, in the EAP access authentication process, when the message carrying the strategy and the capability of the H-CSN sent to the decision point passes through the V-CSN, the V-CSN adds the strategy and the capability of the V-CSN to the message and forwards the message to the decision point; or the strategy and the capability of the V-CSN are configured on the ASN in advance.
10. The method of claim 1, wherein if the decision point is an ASN, the MS sends the MS's policies and capabilities to the ASN by one of:
mode 131, in the router discovery process, sending RS message to ASN through router request;
the method 132, in the DHCP process, explicitly or implicitly sends the DHCP message to the ASN;
the method 133, sending to the ASN through signaling between the ASN-GW and the BS, and signaling between the BS and the MS;
mode 134, sending to the ASN during EAP access authentication;
mode 135, send to ASN through neighbor solicitation NS message.
11. The method of claim 1 wherein if the decision point is an ASN, the ASN notifies the MS of the selected mobile IP mode by one of:
mode 141, notifying the MS during EAP access authentication;
mode 142, notifying the MS in the DHCP process;
mode 143, notifying MS by router broadcast RA message in router discovery process;
mode 144, notifying MS through signaling between access service network gateway ASN-GW and base station BS, and signaling between BS and MS;
the method 145 informs the MS via neighbor broadcast NA messages.
12. The method of claim 1 wherein if the decision point is H-CSN, the MS, ASN, and V-CSN send their policies and capabilities to the H-CSN.
13. The method of claim 12, wherein the MS, ASN, and V-CSN send policies and capabilities to the H-CSN during EAP access authentication.
14. The method of claim 12, wherein the ASN makes a pre-decision based on the acquired policies and capabilities of the MS and/or itself, and sends the pre-decision set of policies and capabilities to the H-CSN.
15. The method of claim 12, wherein the V-CSN makes a pre-decision based on the acquired policies and capabilities of the ASN, MS, and/or itself, and sends the pre-decision set of policies and capabilities to the H-CSN.
16. The method of claim 1, wherein if the decision point is H-CSN, the H-CSN notifies the MS of the selected mobile IP mode by one of:
mode 151, notifying the MS directly in the EAP procedure;
mode 152, in EAP process, notify ASN, notify MS;
153, notifying ASN in EAP process, and notifying MS by ASN in DHCP process;
mode 154, notifying ASN in EAP process, and notifying MS by ASN in router discovery process through router broadcast RA message;
mode 155, notifying ASN in EAP process, and notifying MS by ASN through neighbor broadcast NA message;
mode 156, notify ASN in EAP process, notify MS through signaling between access service network gateway ASN-GW and base station BS, and signaling between BS and MS.
17. The method of claim 1,
if the selected mobile IP mode is the Proxy Mobile Internet Protocol (PMIP) mode, the constructed router broadcast message contains a home network prefix; or,
if the selected mobile IP mode is a Client Mobile Internet Protocol (CMIP) mode or a simple IP6 mode, the constructed router broadcast message contains a local network prefix; or,
if the selected mobile IP mode is a mixed mode of CMIP and PMIP, the constructed router broadcast message contains the home network prefix and the home network prefix.
18. The method of claim 17, wherein if the router broadcast message includes a local network prefix and a home network prefix, the router broadcast message further carries indication information for distinguishing the local network prefix from the home network prefix.
19. A wireless network, comprising: a network side, a mobile station MS, and a decision unit,
the decision unit is used for acquiring the strategies and the capabilities of the network side and the MS, selecting one strategy and one capability from the strategy and capability intersection of the network side and the MS, correspondingly selecting a mobile IP mode according to the selected strategy and capability, and informing the network side and/or the MS of the selected mobile IP mode; after the ASN is indicated to acquire the selected mobile IP mode, an access router AR in the ASN constructs a router broadcast message according to the selected mobile IP mode; the network side at least comprises one of the following networks: an access service network ASN, a home connection service network H-CSN and a visiting place connection service network V-CSN; the decision unit is located in the MS, the ASN or the H-CSN.
20. A decision entity, comprising:
an obtaining unit, configured to obtain a policy and capability of a mobile station MS and a network side;
the strategy and capability selecting unit is used for acquiring the intersection of the strategies and the capabilities acquired by the acquiring unit and selecting one strategy and capability from the intersection;
a mobile IP mode selection unit for selecting a mobile IP mode according to the strategy and the capability selected by the strategy and capability selection unit;
a notification unit, configured to notify the network side and/or the MS of the mobile IP mode selected by the mobile IP mode selection unit; after the ASN is indicated to acquire the selected mobile IP mode, an access router AR in the ASN constructs a router broadcast message according to the selected mobile IP mode; the decision entity is located within the MS or within an entity of the ASN or H-CSN.
CN2007101451291A 2007-01-23 2007-08-24 Method for selecting mobile IP mode in wireless network, wireless network and decision entity Expired - Fee Related CN101272321B (en)

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CN1290462A (en) * 1998-02-10 2001-04-04 艾利森电话股份有限公司 Methods and apparatus for location area scheme negotiation in communications systems
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CN1889508A (en) * 2005-06-16 2007-01-03 华为技术有限公司 Speech business route control method based on business trigging and network frame

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1290462A (en) * 1998-02-10 2001-04-04 艾利森电话股份有限公司 Methods and apparatus for location area scheme negotiation in communications systems
CN1735059A (en) * 2003-10-24 2006-02-15 微软公司 Network and interface selection on computing device in which connection can be established via plurality of network communication media
CN1889508A (en) * 2005-06-16 2007-01-03 华为技术有限公司 Speech business route control method based on business trigging and network frame

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