WO2014029232A1 - 一种数据传输方法及装置 - Google Patents
一种数据传输方法及装置 Download PDFInfo
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- WO2014029232A1 WO2014029232A1 PCT/CN2013/077620 CN2013077620W WO2014029232A1 WO 2014029232 A1 WO2014029232 A1 WO 2014029232A1 CN 2013077620 W CN2013077620 W CN 2013077620W WO 2014029232 A1 WO2014029232 A1 WO 2014029232A1
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- 238000000034 method Methods 0.000 title claims abstract description 127
- 238000005457 optimization Methods 0.000 claims abstract description 256
- 230000005540 biological transmission Effects 0.000 claims abstract description 179
- 230000011664 signaling Effects 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims abstract description 18
- 230000004044 response Effects 0.000 claims description 95
- 238000012423 maintenance Methods 0.000 claims description 35
- 238000012546 transfer Methods 0.000 claims description 28
- 230000003993 interaction Effects 0.000 claims description 20
- 230000002457 bidirectional effect Effects 0.000 claims description 14
- 238000012217 deletion Methods 0.000 claims 2
- 230000037430 deletion Effects 0.000 claims 2
- 230000008569 process Effects 0.000 description 40
- 238000010586 diagram Methods 0.000 description 17
- 230000000977 initiatory effect Effects 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 5
- 230000005641 tunneling Effects 0.000 description 3
- 230000004807 localization Effects 0.000 description 2
- 238000012897 Levenberg–Marquardt algorithm Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a data transmission method method and apparatus. Background technique
- the anchor In Distributed Mobility Management (DMM), the anchor also assumes Local Mobility Anchor (LMA) and Mobile Access Gateway (MAG, Mobile Access) in Proxy Mobile IPv6 ( ⁇ , Proxy Mobile IPv6).
- LMA Local Mobility Anchor
- MAG Mobile Access Gateway
- Proxy Mobile IPv6 Proxy Mobile IPv6
- the functional solution of Gateway is called a fully distributed mobility management solution.
- distributed anchor technology is usually adopted, and the distributed anchor point refers to: when a mobile node (MN, Mobile Node) moves to a new access point, the newly generated session
- MN Mobile Node
- the address prefix is assigned by the new access point and anchored, that is, there is a MN with multiple data streams anchored at different anchor points.
- the other is in the existing PMIPv6, which uses centralized mobility management for route optimization and localized routing.
- the process of initiating route optimization and localization routing is as follows:
- the local mobility anchor LMA (MN) initiates a route optimization trigger (RO Trigger) command to the peer mobility anchor LMA (CN), and informs the local mobile access gateway MAG (MN) )the address of,
- the LMA (CN) initiates a route optimization start command (RO Init) to the peer mobile access gateway MAG (CN), and then the MAG (CN) establishes a tunnel with the MAG (MN) (RO Setup), and after the tunnel is established, the data is performed. transmission.
- each anchor point is treated as an LMA
- multiple sessions may be generated on different anchor points when moving, so there are multiple route optimization tunnels.
- ⁇ moves the maintenance of the route optimization tunnel requires LMA ( ⁇ ) to signal to each LMA (CN).
- CN LMA
- the anchor of each stream as a L LMA needs to send a route optimization process to each LMA ( CN ).
- Lt moves there may be multiple LMAs ( ⁇ ), so multiple signaling needs to be sent, which causes technical problems with large signaling overhead.
- the data stream needs to be forwarded to the current anchor point through the original anchor point, and there is a technical problem of long route.
- the DMM distributed anchor architecture cannot be applied. Even if the application is enabled, the signaling overhead is also a technical problem.
- a data transmission method and apparatus are provided to solve the technical problem that the existing route optimization and localized routing technology in the PMIPv6 cannot be applied and the signaling overhead is large under the DMM distributed anchor architecture.
- an embodiment of the present invention provides a data transmission method, where the method includes:
- the N-D-MAG notifies the initial distributed mobile access gateway F-D-M AG of the MN to continue to use the address allocated by the F-D-MAG for the MN;
- the N-D-MAG performs data transmission with the D-MAG through the established route optimization tunnel.
- An embodiment of the present invention further provides a data transmission method, where the method includes:
- the ND-MAG When the mobile node MN moves to the next distributed mobile access gateway NDM AG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to use the FD-MAG to allocate for the MN. Address
- the ND-MAG acquires routing tunnel information established on the distributed mobile access gateway PD-MAG before the MN handover; the tunnel information includes: a D-MAG address where all CNs are located, and a MN-ID or MN Address prefix
- An embodiment of the present invention further provides a data transmission method, where the method includes:
- the ND-MAG When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG, and continues to use the address allocated by the FD-MAG for the MN. ;
- the ND-MAG requests the distributed mobile access gateway PD-MAG before the MN to perform route optimization tunnel transfer, and obtains, from the PD-MAG, the ND-MAG where the CN corresponding to the MN is currently located. Address
- the N-D-MAG establishes a route to maintain the optimized tunnel with the D-MAG corresponding to the current D-MAG address of the CN;
- the N-D-MAG where the MN is currently located maintains the optimized tunnel and the D-MAG where the CN is currently located for data transmission.
- An embodiment of the present invention provides a data transmission method, where the method includes:
- the ND-MAG When the mobile node MN moves to the current distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN to continue to use the address allocated by the FD-MAG for the MN. ;
- the ND-MAG informs the CN communicating with the MN of the execution of route optimization, and establishes a route optimized bidirectional tunnel with the CN;
- the ND-MAG performs data transmission with the CN through the established bidirectional tunnel.
- An embodiment of the present invention further provides a data transmission method, where the method includes:
- the ND-MAG When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to allocate the MN using the FD-MAG. the address of;
- the N-D-MAG notifies the distributed mobile access gateway P-D-MAG before the MN handover to delete the tunnel related to the MN;
- the N-D-MAG notifies the CN of the MN-ID and the current N-D-MAG address of the MN to communicate with the MN;
- the N-D-MAG establishes a route with the CN to maintain an optimized tunnel
- the N-D-MAG maintains an optimized tunnel and performs data transmission with the CN through the established route.
- An embodiment of the present invention further provides a data transmission method, where the method includes:
- the ND-MAG When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG, and continues to use the address allocated by the FD-MAG for the MN. ;
- the N-D-MAG requests the distributed mobile access gateway P-D-MAG before the MN handover to perform route optimization tunnel transfer;
- the N-D-MAG establishes a route optimization tunnel with the CN corresponding to the address of the CN; and the N-D-MAG maintains the tunnel and the CN for data transmission through the established route optimization.
- An embodiment of the present invention provides a data transmission method, where the method includes:
- the ND-MAG When the mobile node MN moves to the current distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to use the FD-MAG to allocate for the MN. Addressing and initiating route optimization; so that the FD-MAG informs the CN that communicates with the MN, the ND-MAG establishes a route optimization tunnel with the CN, and notifies the CN of the MN-ID and the ND-MAG address;
- the ND-MAG performs data transmission with the CN through the established route optimization tunnel.
- An embodiment of the present invention further provides a data transmission method, where the method includes: When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG, and continues to use the FD-MAG to allocate addresses and routes for the MN. Optimizing the maintenance; so that the FDM AG informs the CN that communicates with the MN, the ND-MAG maintains a route optimization tunnel with the CN, and informs the CN of the address of the ND-MAG;
- an embodiment of the present invention provides an apparatus for data transmission, including:
- a notifying unit configured to notify the initial distributed mobile access gateway F-D-MAG of the MN when the mobile node MN is detected to access, and continue to use the F-D-MAG to allocate an address for the MN;
- An obtaining unit configured to acquire an address of a D-MAG currently in communication with the MN, where the communication peer node CN is currently located;
- a transmitting unit configured to perform data transmission with the D-MAG through the established route optimization tunnel.
- An embodiment of the present invention provides a data transmission apparatus, including:
- a notifying unit configured to notify the initial distributed mobile access gateway FD-MAG of the MN when the mobile node MN is detected to access, and continue to use the FD-MAG to allocate an address for the MN;
- an establishing unit configured to establish a route maintenance optimization tunnel with the D-MAG address
- a transmission unit configured to maintain an optimized tunnel and perform data transmission with the D-MAG by using the established route
- An embodiment of the present invention provides a data transmission apparatus, including:
- a notification unit configured to notify the initial distributed mobile access gateway F-D-MAG when the mobile node MN is detected to access, and continue to use the F-D-MAG to allocate an address for the MN;
- a requesting unit configured to request the distributed mobile access gateway PD-MAG before the MN handover to perform route optimization tunnel transfer
- An obtaining unit configured to acquire, from the PD-MAG, an address of an ND-MAG where the CN currently communicating with the MN is currently located;
- a transmission unit configured to maintain an optimized tunnel and establish a CN through the established route
- D-MAG performs data transmission.
- An embodiment of the present invention provides a data transmission apparatus, including:
- a notifying unit configured to notify the initial distributed mobile access gateway F-D-MAG of the MN when the mobile node MN is detected to access, and continue to use the F-D-MAG to allocate an address for the MN;
- a establishing unit configured to notify the CN communicating with the MN of the execution of the route optimization, and establish a route optimized bidirectional tunnel with the CN;
- a transmitting unit configured to perform, by the N-D-MAG, data transmission with the CN by using the established bidirectional tunnel.
- the embodiment of the invention further provides a data transmission device, including:
- a first notification unit configured to notify the initial distributed mobile access gateway F-D-MAG of the MN when the mobile node MN accesses, and continue to use the F-D-MAG to allocate an address for the MN;
- a second notification unit configured to notify the distributed mobile access gateway P-D-MAG before the MN handover to delete a tunnel related to the MN;
- a third notification unit configured to notify the MN-ID and the address of the N-D-MAG where the MN is currently located to communicate with the MN;
- An establishing unit configured to establish a route with the CN to maintain an optimized tunnel
- a transmission unit configured to maintain an optimized tunnel and perform data transmission with the CN by using the established route.
- the embodiment of the invention further provides a data transmission device, including:
- a notification unit configured to notify the MN of the initial distributed mobile access gateway FD-MAG when the mobile node MN accesses, continue to use the FD-MAG to allocate an address for the MN, and request a unit for requesting the MN
- the distributed mobile access gateway PD-MAG before handover performs route optimization tunnel transfer;
- An establishing unit configured to establish a route optimization tunnel by the CN corresponding to the address of the CN, and a transmission unit, configured to optimize the tunnel and the CN to perform data transmission by using the established route.
- the embodiment of the invention further provides a data transmission device, including:
- a notification unit configured to notify the initial distributed mobile access gateway FD-MAG of the MN when accessing the mobile node MN, continue to use the FD-MAG to allocate an address and initiate route optimization for the MN;
- the FD-MAG informs the CN that communicates with the MN, the ND-MAG establishes a route optimization tunnel with the CN, and notifies the CN of the MN-ID and the ND-MAG address;
- the embodiment of the invention further provides a data transmission device, including:
- a notification unit configured to notify the initial distributed mobile access gateway FD-MAG of the MN when the mobile node MN is detected to access, and continue to use the FD-MAG to maintain the address and route optimization allocated for the MN;
- the FD-MAG informs the CN that communicates with the MN, the data transmission device maintains a route optimization tunnel with the CN, and informs the CN of the address of the data transmission device;
- the embodiment of the present invention mainly relates to a route optimization initiation and a maintenance route optimization phase, wherein the route optimization initiation node, that is, the ND-MAG currently accessed by the MN, through the current D of the CN communicated with the MN -MAG directly establishes a route optimization tunnel, and optimizes the tunnel for data transmission through the route, thereby solving the technical problem of long route length in the distributed anchor architecture in the DMM, and also reducing delay and jitter; maintaining the route optimization phase, All the previously established tunnel information can be obtained through one signaling interaction, and it is not necessary to re-query the address of the anchor where the CN is located each time, thereby saving signaling overhead. Further, in the process of maintaining the route optimization, the old tunnel can be deleted through one signaling interaction, and the signaling overhead is also saved.
- FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention
- FIG. 2 is a flowchart of a second data transmission method according to an embodiment of the present invention.
- FIG. 3 is a flowchart of a third data transmission method according to an embodiment of the present invention.
- FIG. 4 is a flowchart of a fourth data transmission method according to an embodiment of the present invention.
- FIG. 5 is a flowchart of a fifth data transmission method according to an embodiment of the present invention.
- FIG. 6 is a flowchart of a sixth data transmission method according to an embodiment of the present invention.
- FIG. 7 is a flowchart of a seventh data transmission method according to an embodiment of the present invention.
- FIG. 8 is a flowchart of an eighth data transmission method according to an embodiment of the present invention.
- FIG. 9 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention
- FIG. 10 is a schematic structural diagram of a second data transmission apparatus according to an embodiment of the present invention
- FIG. 11 is a third data according to an embodiment of the present invention.
- FIG. 12 is a schematic structural diagram of a fourth data transmission apparatus according to an embodiment of the present invention
- FIG. 13 is a schematic structural diagram of a fifth data transmission apparatus according to an embodiment of the present invention
- FIG. 15 is a schematic structural diagram of a system for distributed mobility management according to an embodiment of the present invention
- FIG. 16 is a schematic diagram of a distributed mobility management system according to an embodiment of the present invention; Optimized signaling flow chart;
- FIG. 17 is a signaling flowchart of maintaining route optimization in distributed mobility management according to an embodiment of the present invention.
- FIG. 18 is a signaling flowchart of maintaining a multi-tunnel for route optimization in distributed mobility management according to an embodiment of the present invention.
- FIG. 19 is a flowchart of another route-optimized maintenance signaling according to an embodiment of the present invention.
- FIG. 20 is a schematic diagram of another route optimization-maintaining multi-tunnel signaling flow according to an embodiment of the present invention.
- FIG. 21 is a schematic structural diagram of another system for distributed mobility management according to an embodiment of the present disclosure.
- FIG. 22 is a signaling flowchart of another route optimization initiation according to an embodiment of the present invention
- FIG. 23 is a signaling flowchart of still maintaining route optimization in distributed mobility management according to an embodiment of the present invention
- FIG. 24 is a signaling flowchart of still providing maintenance of route optimization in distributed mobility management according to an embodiment of the present invention.
- FIG. 25 is a signaling flowchart of a route optimization initiation according to an embodiment of the present invention
- FIG. 26 is a signaling flowchart of maintaining route optimization in distributed mobility management according to an embodiment of the present invention.
- the distributed anchor point in the embodiment of the present invention is called a Distributed Mobile Access Gateway (D-MAG), where
- F-D-MAG First D-MAG: The D-MAG accessed by the MN when the session is initially initiated, and the D-MAG performs IPv6 address prefix allocation.
- New D-MAG The D-MAG currently accessed by the MN.
- FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention. the method includes:
- Step 101 When the mobile node MN moves to the current distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to use the FD-MAG to allocate the MN. the address of;
- the update message may be enhanced by the enhanced proxy binding.
- the route optimization indication in the ePBU/ePBA notifies the initial distributed mobile access gateway F-D-MAG to continue to use the address assigned by the F-D-MAG to the MN.
- Step 102 The ND-MAG acquires a communication peer node that communicates with the MN.
- the ND-MAG sends a request for querying the address of the D-MAG where the CN is currently located to the FD-MAG, where the request includes the MN-ID and a route optimization indication;
- the ND-MAG receives a response sent by the FD-MAG including an address of the D-MAG where the CN is currently located.
- the request may be an enhanced proxy binding update message ePBU or the like.
- Step 103 The N-D-MAG establishes a route optimization tunnel with the D-MAG corresponding to the D-MAG address.
- the process of establishing a route optimization tunnel is: the ND-MAG sends a route optimization tunnel request to the D-MAG corresponding to the D-MAG address, where the request includes the address of the ND-MAG and a route optimization indication; The ND-MAG receives the route-optimized tunnel response sent by the D-MAG.
- the request for querying the address of the D-MAG where the CN is currently located is an enhanced proxy binding update ePBU message, where the ePBU message includes a response of the address of the D-MAG where the CN is currently located as an enhanced proxy binding response ePBA response;
- the route optimization tunnel request is established as an ePBU message, and the established route optimization tunnel response is an ePBA response.
- Step 104 The N-D-MAG performs data transmission with the D-MAG through the established route optimization tunnel.
- the embodiment of the present invention mainly relates to route optimization initiation, that is, the ND-MAG currently accessed by the MN directly establishes a route optimization tunnel through the D-MAG where the CN currently communicating with the MN is located, and optimizes the tunnel for data transmission by using the route. Therefore, the technical problem of routing length under the distributed anchor architecture in the DMM is solved, and the delay and jitter are also reduced.
- FIG. 2 is a flowchart of a second data transmission method according to an embodiment of the present invention.
- the method includes:
- Step 201 When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to use the FD-MAG.
- the initial distributed mobile access gateway F-D-MAG can be notified by the route optimization indication in the enhanced proxy binding update message, and the address allocated by the F-D-MAG for the MN is continuously used.
- Step 202 The ND-MAG acquires the distributed mobile access network before the MN handover.
- the method for obtaining the method includes: sending, by the ND-MAG, an enhanced proxy binding update ePBU message to the PD-MAG, where the ePBU message includes: a D-MAG address where all CNs requesting communication with the MN are located, and The MN-ID or the address prefix of the MN corresponding to the CN; the ND-MAG receives the PD-MAG enhanced proxy binding response ePBA response, and the ePBA response includes: a D-MAG address where the CN is located, And an address prefix of the MN-ID or MN corresponding to the CN.
- Step 203 The N-D-MAG establishes a route-optimized tunnel with the D-MAG address.
- the process of establishing a route-optimized tunnel is described in the process of establishing a route-optimized tunnel in the foregoing embodiment, and details are not described herein.
- Step 204 The N-D-MAG maintains an optimized tunnel and performs data transmission with the D-MAG through the established route.
- the tunnel information established on the PD-MAG including the address of the D-MAG where all CNs communicating with the MN are located and the address prefix of its corresponding MN. That is to say, all the previously established tunnel information can be obtained through the signaling interaction of this time, thereby achieving the purpose of saving signaling overhead.
- the P-D-MAG deletes the previously established tunnel, or waits for it to expire automatically.
- the routing optimization tunnel is mainly maintained during the mobile node MN.
- all the previously established tunnel information can be obtained through one signaling interaction, without having to go every time.
- the address of the anchor where the CN is located is re-queried, thereby saving signaling overhead.
- the old tunnel can also be deleted through one signaling interaction, and the signaling overhead is also saved.
- FIG. 3 is a flowchart of a third method for data transmission according to an embodiment of the present invention. The method is also based on the embodiment shown in FIG.
- Step 301 When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG, Continue to use the address allocated by the FD-MAG for the MN;
- Step 302 The ND-MAG requests the distributed mobile access gateway PD-MAG before the MN to perform route optimization tunnel transfer, and obtains, from the PD-MAG, the current ND of the CN corresponding to the MN. - the address of the MAG;
- the step of the ePBU includes: the MN-MAG sends an enhanced proxy binding update ePBU message to the distributed mobile access gateway PD-MAG before the MN handover, and requests a route optimization tunnel transfer, where the ePBU message includes: -ID and the address of the ND-MAG where the MN is currently located; the PD-MAG sends an ePBU message to the ND-MAG where one or more CNs are located, so that the ND-MAG where one or more CNs are located knows the MN An address of the ND-MAG; the PD-MAG receives an enhanced proxy binding response ePBA response sent by the ND-MAG where the one or more CNs are located, where the ePBA response includes: a CN currently communicating with the MN is currently located Address of the ND-MAG; the ND-MAG receives the ePBA response forwarded by the PD-MAG.
- Step 303 The N-D-MAG where the MN is currently located establishes a route maintenance optimization tunnel with the D-MAG corresponding to the current D-MAG address of the CN.
- Step 304 The N-D-MAG where the MN is currently located maintains the optimized tunnel and the D-MAG where the CN is currently located to perform data transmission.
- N-D-MAG the route optimization maintenance process
- PD-MAG (MN) informs the D-MAG (D-MAG(CN)) where the CN is located according to the tunnel condition already established on it, the address of the ND-MAG (MN), that is, the new care-of address of the MN;
- PD -MAG(MN) returns ePBA to ND-MAG (MN) to inform all CNs of D-MAG addresses, so that ND-MAG (MN) and ND-MAG (CN) can directly transmit data through route optimization tunnel , to achieve the purpose of maintaining route optimization.
- FIG. 4 is a flowchart of a fourth data transmission method according to an embodiment of the present invention, where the method includes:
- Step 401 When the mobile node MN moves to the current distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN. Continue to use the address allocated by the FD-MAG for the MN;
- the initial distributed mobile access gateway F-D-MAG of the MN may be notified by the ePBU to continue to use the address allocated by the F-D-MAG for the MN.
- Step 402 The N-D-MAG notifies the CN that communicates with the MN to perform route optimization, and establishes a route optimized bidirectional tunnel with the CN.
- Step 403 The N-D-MAG performs data transmission with the CN through the established bidirectional tunnel.
- the CN may be a fixed terminal or a content server, and has a signaling interaction capability for establishing a tunnel.
- FIG. 5 is a flowchart of a fifth data transmission method according to the present invention. The method further includes:
- Step 501 When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to use the FD-MAG.
- Step 502 The N-D-MAG notifies the distributed mobile access gateway P-D-MAG before the MN handover to delete the tunnel related to the MN.
- Step 503 The N-D-MAG notifies the CN of the MN-ID and the current N-D-MAG address of the MN to communicate with the MN;
- Step 504 The N-D-MAG establishes a route with the CN to maintain an optimized tunnel.
- Step 505 The N-D-MAG maintains an optimized tunnel through the established route and the
- the CN performs data transmission.
- FIG. 6 is a flowchart of a sixth data transmission method according to an embodiment of the present invention. The method further includes:
- Step 601 When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG, and continues to use the FD-MAG as the MN. Assigned address;
- Step 602 The N-D-MAG requests the distributed mobile access gateway P-D-MAG before the MN handover to perform route optimization tunnel transfer.
- the step specifically includes: sending, by the ND-MAG, an enhanced proxy binding update ePBU message to the distributed mobile access gateway PD-MAG before the MN handover, requesting route optimization tunneling
- the ePBU message includes: an MN-ID and an address of an ND-MAG where the MN is currently located; the PD-MAG sends an ePBU message to all CNs communicating with the MN, informing the ND-MAG and the CN to maintain a route optimization state.
- the PD-MAG receives an enhanced proxy binding response ePBA response sent by the CN; the ND-MAG receives the ePBA response sent by the PD-MAG.
- Step 603 The N-D-MAG establishes a route optimization tunnel with the CN corresponding to the address of the CN.
- Step 604 The N-D-MAG maintains the tunnel and the CN to perform data transmission by using the established route optimization.
- the method may further include: after the P-D-MAG sends an ePBU message to all CNs communicating with the MN, deleting the tunnel previously established with the MN.
- the CN is a fixed terminal or a content server, and has a signaling interaction capability for establishing a tunnel.
- FIG. 7 is a flowchart of a seventh data transmission method according to an embodiment of the present invention, where the method includes:
- Step 701 When the mobile node MN moves to the current distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG of the MN, and continues to use the FD-MAG as The MN allocates an address and initiates route optimization; so that the FD-MAG informs the CN that communicates with the MN, the ND-MAG establishes a route optimization tunnel with the CN, and notifies the CN of the MN-ID and the ND-MAG address;
- Step 702 The N-D-MAG performs data transmission with the CN by using the established route optimization tunnel.
- FIG. 8 is a flowchart of an eighth data transmission method according to an embodiment of the present invention.
- the embodiment further includes:
- Step 801 When the mobile node MN moves to the next distributed mobile access gateway ND-MAG, the ND-MAG notifies the initial distributed mobile access gateway FD-MAG, and continues to use the FD-MAG to allocate the MN. Maintaining the address and route optimization; so that the FD-MAG informs the CN that communicates with the MN, the ND-MAG and the CN maintain a route optimization tunnel, and inform the CN of the address of the ND-MAG;
- Step 802 The ND-MAG performs data transmission with the CN by using the established route optimization tunnel.
- the method may further include: the ND-MAG notifying the distributed mobile access gateway PD-MAG before the handover to delete the tunnel established before the foregoing.
- the embodiment of the present invention further provides a data transmission device, which is shown in FIG. 9.
- the data transmission device includes: a notification unit 91, an acquisition unit 92, an establishment unit 93, and a transmission unit 94.
- the notification unit 91 is configured to notify the initial distributed mobile access gateway FD-MAG of the ⁇ when the mobile node ⁇ access is detected, and continue to use the address allocated by the FD-MAG as the ,, Specifically, the method is used to notify the initial distributed mobile access gateway FD-MAG by using the route optimization indication in the enhanced proxy binding update message, and continue to use the address allocated by the FD-MAG for the MN;
- the obtaining unit 92 is configured to acquire and The address of the D-MAG where the communication partner end CN is currently located;
- the establishing unit 93 is configured to establish a route optimization tunnel with the D-MAG corresponding to the D-MAG address; the data transmission unit 94.
- the data transmission is performed by using the established route optimization tunnel and the D-MAG.
- the acquiring unit includes: a first sending unit and a first receiving unit, where the first sending unit is configured to send, to the FD-MAG, a request for querying an address of a D-MAG where the CN is currently located, where the request is The MN-ID and the route optimization indication are included; the first receiving unit is configured to receive a response that is sent by the FD-MAG and includes an address of the D-MAG where the CN is currently located.
- the establishing unit includes: a second sending unit and a second receiving unit, where the second sending unit is configured to send a route optimization tunnel request to the D-MAG corresponding to the D-MAG address, where the request includes The address of the ND-MAG and the route optimization indication; the second receiving unit is configured to receive a route-optimized tunnel response sent by the D-MAG.
- the device may be integrated in the distributed mobile access gateway N-D-MAG currently accessed or attached by the MN, or may be deployed in a single step.
- the embodiment of the present invention further provides a data transmission apparatus, where the data transmission apparatus includes: a notification unit, an acquisition unit, an establishment unit, and a transmission unit, where the notification unit is configured to detect When the mobile node MN accesses, the MN's initial distributed mobile access gateway FD-MAG is notified to continue to use the FD-MAG to allocate an address for the MN, which is specifically used to enhance the route optimization indication in the proxy binding update message.
- the data transmission apparatus includes: a notification unit, an acquisition unit, an establishment unit, and a transmission unit, where the notification unit is configured to detect When the mobile node MN accesses, the MN's initial distributed mobile access gateway FD-MAG is notified to continue to use the FD-MAG to allocate an address for the MN, which is specifically used to enhance the route optimization indication in the proxy binding update message.
- An acquiring unit configured to obtain routing tunnel information established on the distributed mobile access gateway PD-MAG before the MN handover; the tunnel information includes: a D-MAG address where all CNs are located, and an MN-ID or MN An address prefix; the establishing unit, configured to establish a route maintenance optimization tunnel with the D-MAG address; and the transmitting unit, configured to maintain an optimized tunnel and perform data transmission with the D-MAG by using the established route.
- the acquiring unit includes: a sending unit and a receiving unit, where the sending unit is configured to send an enhanced proxy binding update ePBU message to the PD-MAG, where the ePBU message includes: requesting all communications with the MN a D-MAG address where the CN is located, and an MN-ID or an MN address prefix corresponding to the CN; the receiving unit, configured to receive the PD-MAG enhanced proxy binding response ePBA response, where the ePBA response includes : the D-MAG address where the CN is located, and the MN-ID or MN address prefix corresponding to the CN.
- the device may be integrated into the distributed mobile access gateway N-D-MAG, or may be deployed in a single step.
- FIG. 10 is a schematic structural diagram of a second type of data transmission apparatus according to an embodiment of the present invention. The method is based on the embodiment shown in FIG. 9, and includes: a notification unit 10, a request unit 11, and an obtaining unit 12, The establishing unit 13 and the transmitting unit 14, wherein the notifying unit 10 is configured to notify the initial distributed mobile access gateway FD-MAG when the mobile node MN is detected to access, and continue to use the FD-MAG as the MN.
- the requesting unit 11 is configured to request the distributed mobile access gateway PD-MAG before the MN to perform the route optimization tunnel transfer;
- the acquiring unit 12 is configured to obtain the PD-MAG The address of the ND-MAG where the CN currently communicating with the MN is located;
- the establishing unit 13 is configured to establish a route maintenance optimization tunnel with the D-MAG corresponding to the D-MAG address where the CN is currently located; The optimized tunnel is maintained through the established route to transmit data with the D-MAG where the CN is currently located.
- the requesting unit includes: a sending unit and a receiving unit, where the sending unit is configured to send an enhanced proxy binding update ePBU message to the distributed mobile access gateway PD-MAG before the MN handover, requesting routing Optimizing the tunnel transfer, the ePBU message includes: an MN-ID and an address of the ND-MAG where the MN is currently located; so that the PD-MAG sends an ePBU message to the ND-MAG where one or more CNs are located, so that one Or multiple CNs
- the ND-MAG knows the address of the ND-MAG where the MN is located; the receiving unit is configured to receive the ePBA response sent by the PD-MAG, where the ePBA response is sent by one or more ND-MAGs where the CN is located
- the enhanced proxy binding response ePBA response includes: an address of the ND-MAG where the CN currently communicating with the MN is currently located.
- the device may be integrated into the distributed mobile access gateway N-D-MAG, or may be deployed in a single step.
- FIG. 11 is a schematic structural diagram of a third data transmission apparatus according to an embodiment of the present invention.
- the apparatus includes: a notification unit 111, an establishing unit 112, and a transmission unit 113, where the notification unit 111 is configured to When the mobile node MN is detected to be connected, the initial distributed mobile access gateway FD-MAG of the MN is notified to continue to use the address allocated by the FD-MAG for the MN; the establishing unit 112 is configured to The CN of the communication informs the execution of the route optimization, and establishes a route-optimized bidirectional tunnel with the CN; the transmission unit 113 is configured to perform data transmission between the ND-MAG and the CN through the established bidirectional tunnel.
- the CN communicating with the MN may be a fixed terminal or a content server, and has a signaling interaction capability for establishing a tunnel.
- the device may be integrated into the distributed mobile access gateway N-D-MAG, or may be deployed in a single step.
- FIG. 12 is a schematic structural diagram of a fourth type of data transmission apparatus according to an embodiment of the present invention.
- the apparatus includes: a first notification unit 121, a second notification, on the basis of the embodiment shown in FIG.
- the FD-MAG continues to use the FD-MAG to allocate an address for the MN.
- the second notification unit 122 is configured to notify the distributed mobile access gateway PD-MAG before the MN handover to delete the MN related to the MN.
- the third notification unit 123 is configured to notify the CN of the MN-ID and the address of the ND-MAG where the MN is currently located, the CN that communicates with the MN, and the establishing unit 124 is configured to establish a route maintenance optimization tunnel with the CN.
- the transmitting unit 125 is configured to maintain an optimized tunnel and the CN by using the established route. According to transmission.
- FIG. 13 is a schematic structural diagram of a fifth type of data transmission apparatus according to an embodiment of the present invention.
- the apparatus includes: the notification unit 131, the request unit 132, and the establishment.
- the requesting unit 132 is configured to request the distributed mobile access gateway PD-MAG before the MN to perform route optimization tunneling, and the establishing unit 133 is configured to establish a route with the CN corresponding to the address of the CN. Optimizing the tunnel; the transmitting unit 134 is configured to maintain data transmission between the tunnel and the CN by using the established route optimization.
- the requesting unit includes: a sending unit and a receiving unit, where the sending unit is configured to send an enhanced proxy binding update ePBU message to the distributed mobile access gateway PD-MAG before the MN handover, requesting routing Optimizing the tunnel transfer, the ePBU message includes: the MN-ID and the address of the ND-MAG where the MN is currently located; so that the PD-MAG sends an ePBU message to all CNs communicating with the MN, and informs the ND-MAG and the CN. Maintaining a route optimization state; the receiving unit, configured to receive, by using the PD-MAG, an enhanced proxy binding response ePBA response sent by the CN.
- the method may further include: a deleting unit, configured to delete the tunnel previously established with the MN after the P-D-MAG sends an ePBU message to all CNs communicating with the MN.
- a deleting unit configured to delete the tunnel previously established with the MN after the P-D-MAG sends an ePBU message to all CNs communicating with the MN.
- the device may be integrated into the distributed mobile access gateway N-D-MAG, or may be deployed in a single step.
- FIG. 14 is a schematic structural diagram of a sixth data transmission apparatus according to an embodiment of the present invention.
- the apparatus includes: a notification unit 141 and a transmission unit 142, where the notification unit 141 is configured to detect a mobile node MN.
- the notification unit 141 is configured to detect a mobile node MN.
- the notification unit 141 is configured to detect a mobile node MN.
- the FD-MAG When accessing, notifying the initial distributed mobile access gateway FD-MAG of the MN, continuing to use the FD-MAG to allocate an address and initiating route optimization for the MN; so that the FD-MAG informs the CN communicating with the MN
- the ND-MAG establishes a route optimization tunnel with the CN, and notifies the CN of the MN-ID and the ND-MAG address;
- the unit 142 is configured to perform data transmission with the CN by using the route optimization tunnel.
- the device may be integrated into the distributed mobile access gateway N-D-MAG, or may be deployed in a single step.
- the embodiment of the present invention further provides a data transmission apparatus.
- the embodiment is based on the embodiment of FIG. 14.
- the apparatus includes: a notification unit and a transmission unit, where the notification unit is configured to detect the mobile node MN.
- the notification unit is configured to detect the mobile node MN.
- the transmission unit is configured to perform data transmission with the CN by using the established route optimization tunnel.
- the device may further include: a deleting unit, configured to notify the distributed mobile access gateway P-D-MAG before the MN to delete the tunnel established before the MN.
- a deleting unit configured to notify the distributed mobile access gateway P-D-MAG before the MN to delete the tunnel established before the MN.
- the device may be integrated into the distributed mobile access gateway N-D-MAG, or may be deployed in a single step.
- Embodiment 1 In order to facilitate the understanding of those skilled in the art, the following is a specific application example. Embodiment 1
- FIG. 15 is a schematic structural diagram of a system for distributed mobility management according to an embodiment of the present invention; in this embodiment, MN, CN1, and CN2 are both located under D-MAG, and MN is configured by FD-MAG (MN).
- MN Moving to ND-MAG (MN), as shown by the dotted line in the figure, ND-MAG (MN) interacts with FD-MAG (MN) and D-MAG (CN) where CN is currently located to implement distributed mobility management.
- Route optimization the route optimization includes two steps, step one is the initiation of route optimization; step two is the maintenance of route optimization in the MN mobile process, and the specific process of step one is shown in the embodiment shown in FIG. 16, step two The process is detailed in the embodiment shown in Figures 17 and 18.
- Step 161 The MN sends an Attach request or a route (RS, Route Solicitation) request to the ND-MAG (MN); The MN is moved from the FD-MAG (MN) to the ND-MAG (MN), that is, attached to the ND-MAG (MN).
- RS Route Solicitation
- Step 162 The ND-MAG (MN) registers the MN, that is, the registration;
- Step 163 The ND-MAG (MN) sends an enhanced proxy binding update ePBU message to the FD-MAG (MN), the purpose of which is to declare in the FD
- the address of the MN allocated on the -MAG (MN) is still in use; wherein the message includes the MN-ID and the Route Optimization Indicator ROI.
- Step 165 The ND-MAG (MN) sends an ePBU message to the FD-MAG (CN), where the information includes the N-ID and the ROI; requesting to query the D-MAG (CN) address where the CN is currently located, optionally, The ROI flag is set to 10, indicating that the D-MAG (CN) address where the CN is currently located is requested to be queried; wherein the message sent to the FD-MAG (CN) can be implemented by sending the destination address to the MN uplink packet.
- Step 166 The FD-MAG (CN) sends an ePBA response to the ND-MAG (MN), where the response includes the D-MAG (CN) address where the CN is currently located.
- Step 169 ND-MAG (MN) sends a route advertisement to the MN ( RA , Route Advertisement );
- Step 1610A The MN performs data transmission with the N-D-MAG (MN); that is, the IP packet is transmitted;
- Step 1610B The N-D-MAG (MN) and the D-MAG (CN) perform data transmission through the established route optimization tunnel;
- Step 1610C D-MAG (CN) and CN perform data transmission.
- FIG. 17 is a signaling flowchart of maintaining route optimization in distributed mobility management according to an embodiment of the present invention.
- both the MN and the CN are located under the D-MAG; when the MN moves again When the D-MAG is connected to another D-MAG, the newly accessed D-MAG is called ND-MAG.
- the gateway that the MN accesses before moving to the ND-MAG is called PD-MAG (MN).
- Step 171 A MN and PD-MAG (MN) perform data (IP packet) transmission;
- Step 171B PD-MAG (MN) and CN current D-MAG perform data transmission;
- Step 171C D-MAG and CN perform data Transmission
- Step 172 The MN moves to the N-D-MAG (MN) again; that is, the MN attaches again or RS to the N-D-MAG (MN);
- Step 173 The ND-MAG (MN) registers the MN, that is, the registration;
- the MN-ID and the ROI are included in the message.
- it is possible to indicate that the address of the MN allocated on the FD-MAG (MN) 1 is still in use by setting ROI 01.
- This step is an optional step.
- Step 175 The FD-MAG (MN) sends an ePBA response to the ND-MAG (MN).
- the response response also includes the MN-ID and the ROI.
- the ROI identifier may be set to 01 in the response response.
- Step 176 The ND-MAG (MN) sends an ePBU message to the PD-MAG (MN), where the ePBU message includes an MN-ID and an ROI; requesting tunnel information established on the PD-MAG, where the tunnel information includes The address of the D-MAG where all CNs of the MN communicate, and the corresponding MN-ID or MN address prefix;
- the address of the D-MAG where the CN is located is taken as an example, that is, a tunnel exists; and in the case of multiple tunnels, as shown in FIG. 18;
- the N-D-MAG (MN) can obtain all the previously established tunnel information through this signaling interaction, so that the signaling overhead can be reduced.
- the P-D-MAG may delete the previously established tunnel or wait for it to expire automatically.
- Step 178 The ND-MAG (MN) sends an ePBU message to the D-MAGs (CNs) after obtaining the previous tunnel information, where the ePBU message includes: an address of the ND-MAG (MN) and an ROI, where the ROI Used to indicate that a tunnel is established to maintain route optimization;
- Step 179 The D-MAG (CN) sends an ePBA message to the N-D-MAG (MN), where the ePBA message includes an ROI, indicating that the tunnel is established to maintain route optimization.
- Step 1710 The N-D-MAG (MN) sends a route advertisement RA to the MN direction;
- Step 1711A MN and N-D-MAG (MN) perform data transmission; that is, transmit IP packet;
- Step 1711B N-D-MAG (MN) and D-MAG (CN) perform data transmission through the established route optimization tunnel;
- Step 1711C D-MAG (CN) and CN transmit data.
- n tunnels are maintained as an example, as shown in the figure. Includes:
- Step 180A to step 180C MN and PD-MAG (MN) perform data (IP packetl) transmission, PD-MAG (MN) and D-MAG (CN1) perform IP packetl transmission; DM AG (CN1) and CN1 perform IP packetl transmission; Step 181 A to step 181C: MN and PD-MAG (MN) perform data (IP packetn) transmission, PD-MAG (MN) and D-MAG (CNn) perform IP packetn transmission; D-MAG (CNn) and CNn perform IP packetn transmission;
- Step 182 The MN moves to the N-D-MAG (MN) again;; that is, the MN attaches again or RS to the N-D-MAG (MN);
- Step 183 The ND-MAG (MN) registers the MN, that is, the registration;
- Step 185A The F-D-MAG (MN1) sends an ePBAl response to the N-D-MAG (MN); the response response also includes the MN-ID and the ROI;
- the FD-MAG (MNn) is FD-MAG (prefixn);
- Step 186 The ND-MAG (MN) sends an ePBU message to the PD-MAG (MN), where the ePBU message includes an MN-ID and an ROI; requesting tunnel information established on the PD-MAG, where the tunnel information includes all The address of the D-MAG where the CN is located, and the corresponding MN-ID or MN address prefix;
- Step 187 The PD-MAG (MN) sends an ePBA response to the ND-MAG (MN), where the response includes the address of the D-MAG where all CNs (in this embodiment, CN1 ⁇ CNn are taken as an example) (this embodiment D-MAG1 ⁇ D-MAGn as an example), and the corresponding MN-ID or MN address prefix;
- Step 188A ND-MAG (MN) after obtaining the previous tunnel information,
- the D-MAG (CN1) sends an ePBU1 message, where the ePBU1 message includes: an address of the N-D-MAG (MN) and an ROI, where the ROI is used to indicate that the tunnel is established to maintain route optimization;
- Step 189A The D-MAG (CN1) sends an ePBAl message to the N-D-MAG (MN), where the ePBAl message includes an ROI, indicating that the tunnel is established to maintain route optimization.
- Step 188B After obtaining the previous tunnel information, the ND-MAG (MN) The D-MAG (CN) n sends an ePBUn message, where the ePBUn message includes: an address of the ND-MAG (MN) and an ROI, where the ROI is used to indicate that the tunnel is established to maintain route optimization;
- Step 189B The D-MAG (CNn) sends an ePB An message to the N-D-MAG (MN), where the ePBAn message includes an ROI, indicating that the tunnel is established to maintain route optimization.
- Step 1810 The N-D-MAG (MN) sends a route advertisement RA to the MN direction;
- Step 1811 A to step 1811C MN and ND-MAG (MN1) perform IP packetl transmission; ND-MAG (MN1) 1 and D-MAG (CN1) perform IP packetl transmission through the established route optimization tunnel; D-MAG (CNl ) IP packet transmission with CN1;
- Step 1812A to step 1812C MN and ND-MAG (MNn) perform IP packetn transmission; ND-MAG (MNnn and D-MAG (CNn) perform IP packetn transmission through established route optimization tunnel; D-MAG (CNn) and CNn Perform IP packetln transmission.
- a signaling format of the ePBU is: adding a 2-bit state value ROI to the PBU of the PMIPv6; as shown in Table 1, Table 1 is a signaling format of the ePBU, but is not limited thereto. this.
- a signaling format of the ePBA is: Adding a 2-bit state value ROI based on the PBA of the PMIPv6, as shown in Table 2, Table 2 is a signaling format of the ePBA, but is not limited thereto.
- data is transmitted through the established route optimization tunnel, and the solution is solved.
- the old tunnel can be deleted, and the signaling overhead is also saved.
- the route optimization is also divided into two steps, step one: initiation of route optimization; step two: route optimization is maintained in the MN mobile process.
- Step 1 The route optimization is initiated in the same manner as the first step in the first embodiment. For details, see FIG. 1
- Step 2 The signaling flow for maintaining the route optimization is as shown in Figure 19.
- FIG. 19 is a flowchart of another route optimized maintenance signaling according to an embodiment of the present invention.
- Steps 191A to 191C are the same as steps 171 A to 171C, and are specifically described above.
- Steps 192 to 195 are the same as steps 172 to 175, and the details are as follows.
- R0I can be set to 00, and the purpose is to request the P-D-MAG (MN) to perform the route optimization tunnel transfer.
- Step 197 The PD-MAG (MN) sends an ePBU message to the D-MAG where the CN is located, where the D-MAG where the CN is located is called D-MAG (CN);
- the D-MAG knows the address of the MN's ND-MAG; that is, the current care-of address of the MN; wherein, the ePBU message includes the address of the MN-ID and the NDM AG (MN), and the ROI.
- the PD-MAG (MN) informs the D-MAG (ie D-MAG (CN)) where the CN is located according to the tunnel condition already established on the address of the ND-MAG (MN), that is, the new handover of the MN. address.
- the ROI may be set to 11 to inform the D-MAG where the CN is located to know the address of the MN's N-D-MAG.
- Step 198 The D-MAG (CN) sends an ePBA message to the P-D-MAG (MN); the ePBA message includes a D-MAG address of all CNs;
- the purpose of the pair of messages in step 197 and step 198 is to make the D-MAG where the CN is located aware of the address of the MN's ND-MAG, that is, the current care-of address of the MN, so as to facilitate NDM AG (MN) and DM AG (CN).
- MN NDM AG
- CN DM AG
- Step 199 The P-D-MAG (MN) returns an ePBA message to the N-D-MAG (MN), where the ePBA message includes: a D-MAG address of all CNs communicating with the MN, and an ROI;
- the ROI in the ePBA message is set to 00, used to inform the ND-MAG (MN), the address of the D-MAG where the CN is currently located, so that a route optimization tunnel can be established between the two to directly transmit data; Thereby achieving the purpose of maintaining route optimization.
- MN ND-MAG
- Step 1910 The N-D-MAG (MN) sends a route advertisement RA to the MN direction;
- Steps 1911A to 511C are the same as steps 311A to 311C, and are specifically described above.
- the tunneling of steps 196 and 199 can be used to obtain the transition of multiple tunnels, which saves the query.
- FIG. 20 is a flowchart of another route optimization for maintaining a multi-tunnel according to an embodiment of the present invention; in this embodiment, taking n tunnels as an example, specifically Includes:
- Steps 2000A to 2000C are the same as steps 180A to 180C, and the details are as follows;
- Steps 2001A to 2001C are the same as steps 181A to 182C, as described in detail above;
- Steps 2002 to 2005B are the same as steps 182 to 185B, and the details are as follows;
- the ePBU message includes: an address of the MN-ID and the ND-MAG (MN), and the address;
- the ROI may be set to 00, and the purpose is to request the P-D-MAG (MN) to perform the route optimization tunnel transfer.
- MN P-D-MAG
- the P-D-MAG knows the addresses of all the D-MAGs of all the CNs that communicate with the MN, and the manners of obtaining them are the same as before, and details are not described herein again.
- Step 2007A The PD-MAG (MN) sends an ePBU1 message to the D-MAG (CN1), where D-MAG (CN1) is the D-MAG 1 where the CN is located; the purpose is to make the D-MAG 1 where the CN is located aware of the MN.
- Step 2008A The D-MAG (CN1) sends an ePBAl message to the P-D-MAG (MN); the ePBAl message includes the D-MAG1 address of all CNs;
- Step 2007B The PD-MAG (MN) sends an ePBUn message to the D-MAG ( CNn ), where D-MAG(CNn) n is the D-MAG n where the CN is located; the purpose is to make the D-MAG n where the CN is located know The address of the ND-MAG of the MN; that is, the current care-of address of the MN; wherein, the ePBUn message includes the address of the MN-ID and the NDM AG (MN), and the ROI; optionally, the ROI may be set to 11 to inform The D-MAGn where the CN is located knows the address of the MN's ND-MAG.
- Step 2008B D-MAG (CN) n sends an ePBAn message to the P-D-MAG (MN); the ePBAn message includes all CN D-MAGn addresses;
- Step 2009 The PD-MAG (MN) returns an ePBA message to the ND-MAG (MN), the ePBA message includes: a D-MAG address of all CNs associated with the MN, and an ROI; wherein, all associated with the MN
- the D-MAG address of the CN includes: the address of D-MAG (CN) 1 to the address of D-MAG (CN) n.
- the ROI in the ePBA message may be set to 00, used to inform the ND-MAG (MN), the address of all the current D-MAGs of the CN, such that all the CNs that the ND-MAG (MN) communicates with the MN are located.
- Route optimization tunnel can be established between D-MAG (CN) The channel and direct data transmission; thus achieving the purpose of maintaining route optimization.
- Step 2010 The N-D-MAG (MN) sends a route advertisement RA to the MN direction;
- Step 2011A to step 2011C the same as step 1811A to step 1811C, as described in detail above;
- Steps 2012A to 2012C are the same as steps 1812A to 1812C, as described in detail above.
- FIG. 21 a schematic diagram of the system architecture is shown in FIG. 21, and FIG. 21 is the present invention. Another system architecture diagram of distributed mobility management provided by the embodiment.
- the MN is moved from the FD-MAG to the ND-MAG.
- the ND-MAG interacts with the FD-MAG to implement route optimization for distributed mobility management.
- the route optimization is also divided into two. Steps, Step 1: Initiation of route optimization, the specific process is shown in Figure 22; Step 2: Route optimization is maintained in the MN mobile process, and the specific process is shown in Figure 23.
- an initial session is generated on the F-D-MAG, and an IPv6 address prefix is allocated by the same. Specifically include:
- Step 221 The MN attaches or routes (RS) to the N-D-MAG;
- Step 223 When the MN moves, the ND-MAG sends an ePBU message to the FD-MAG, where the message includes the MN-ID and the route optimization indication ROI; indicates the address currently assigned to the MN, or the address prefix is still in use, and Inform FD-MAG to use route optimization mode;
- you can set the ROI 01 to indicate that the address or address prefix currently assigned to the MN is still in use, and notify the route optimization mode to be used;
- Step 224 The F-D-MAG sends an ePBA message to the N-D-MAG; the response response also includes the MN-ID and the ROI;
- Step 225 The N-D-MAG sends an ePBU message to the CN to notify the execution of the CN route optimization.
- the ND-MAG can find the address of the CN through the profile of the MN, or Intercepting the uplink packet of the MN to obtain the address of the CN;
- Step 226 The CN sends an ePBA message to the N-D-MAG to establish a bidirectional tunnel.
- Step 228A MN and N-D-MAG perform data transmission; that is, transmit IP packet;
- Step 228B The N-D-MAG performs data transmission with the CN, that is, delivers an IP packet.
- the N-D-MAG can perform data transmission in a route optimization manner directly with the CN using the established bidirectional tunnel.
- the method includes:
- Step 231A The MN and the P-D-MAG perform data (IP packet) transmission;
- Step 23 IB P-D-MAG and CN perform data transmission
- Step 232 The MN attaches or RS to the N-D-MAG again;
- Step 233 The N-D-MAG registers the MN, that is, Registration;
- Step 234 The N-D-MAG sends an ePBU message to the F-D-MAG, requesting to continue to use the address allocated by the MN; wherein, the message includes the MN-ID and the ROI;
- Step 235 The FD-MAG sends an ePBA response to the ND-MAG.
- the response response also includes the MN-ID and the ROI.
- the ROI identifier may be set to 01 in the response response, indicating that the MN-assignment is continued. Address
- Step 236 The ND-MAG sends an ePBU message to the PD-MAG, where the ePBU message includes the MN-ID and the ROI, and the PD-MAG is notified to delete the tunnel associated with the MN. If there are multiple tunnels on the PD-MAG, the This signaling interaction tells the PD-MAG to delete all.
- Step 238 The ND-MAG sends an ePBU message to the CN, where the message includes: a MN-ID and an ND-MAG address, the purpose of the message is to make the CN know the address of the ND-MAG of the MN, that is, the current care-of address of the MN. , so that a route optimization tunnel can be established between the ND-MAG and the CN to maintain the route optimization process.
- Step 239 The CN sends an ePBA response to the N-D-MAG.
- Step 2310 The N-D-MAG sends an RA to the MN.
- Step 2311 A The MN performs data transmission with the N-D-MAG; that is, the IP packet is transmitted; Step 2311 B: The N-D-MAG performs data transmission with the CN; that is, the IP packet is delivered.
- Embodiment 4 The MN performs data transmission with the N-D-MAG; that is, the IP packet is transmitted; Step 2311 B: The N-D-MAG performs data transmission with the CN; that is, the IP packet is delivered.
- route optimization is also divided into two steps, step one: initiation of route optimization; step two: route optimization is maintained in the MN mobility process.
- step 1 is the same as step 1 in the third embodiment, and the details are as follows;
- FIG. 24 is a signaling flowchart of the maintenance of the route optimization in the distributed mobility management according to the embodiment of the present invention; the specifics include: Step 241 A to Step 245 And 231 A to step 225 are the same as the details. For details, see the above.
- Step 247 The PD-MAG sends an ePBU message to all the CNs communicating with the MN, and informs all the CNs that the ND-MAG and the CN maintain the route optimization state, where the message includes the address and ROI of the ND-MAG; -MAG deletes information about the previous tunnel.
- a CN is taken as an example.
- Step 248 All CNs communicating with the MN send an ePBA response to the PD-MAG, The ePBA response includes the address of the CN;
- Step 249 The P-D-MAG sends an ePBA response to the N-D-MAG, where the ePBA response includes addresses of all CNs that communicate with the MN.
- Step 2410 The N-D-MAG sends an RA to the MN.
- Step 2411A The MN and the N-D-MAG perform data packet transmission
- Step 2411 B The N-D-MAG and the CN perform data packet transmission.
- the route optimization is also divided into two steps. Step 1: The initiation of the route optimization; Step 2: The route optimization is maintained in the MN mobile process, and the corresponding signaling flow chart is shown in FIG. 25 and FIG. Show.
- a signaling flowchart of a route optimization initiation includes:
- Step 251 The MN attaches or routes (RS) requests to the N-D-MAG;
- Step 252 The N-D-MAG registers the MN, that is, Registration;
- Step 253 The N-D-MAG sends an ePBU message to the F-D-MAG, and informs that the address allocated for the MN is used continuously, and the route optimization is initiated.
- the ePBU message includes the address and ROI of the N-D-MAG.
- Step 254 The F-D-MAG sends an ePBU message to the CN, where the ePBU message includes an address of the MN-ID and the N-D-MAG, and the purpose of sending the ePBU message is used to notify the CN of the establishment of the route optimization tunnel.
- the ROI may be set to 11 to notify the CN route optimization tunnel establishment, that is, to inform the CN, the N-D-MAG and the CN to establish route optimization;
- Step 255 The CN sends an ePBA response to the FD-MAG.
- Step 256 The FD-MAG sends an ePBA response to the ND-MAG.
- Step 257 The N-D-MAG sends an RA to the MN;
- Step 258A MN and N-D-MAG perform data transmission; that is, transmit IP packet;
- Step 258B The N-D-MAG performs data transmission with the CN; that is, the IP packet is delivered.
- the fifth embodiment is different from the third embodiment or the fourth embodiment in that: the establishment and maintenance of the route optimization to the CN is performed by the FD-MAG, wherein the ePBU /ePBA in step 114 and step 115 are performed.
- the message includes the addresses of the MN-ID and the ND-MAG.
- the ROI can be set to 11. This pair of messages is used by the P-D-M AG to inform the CN of the establishment of a route optimization tunnel.
- a signaling flowchart of maintaining route optimization in distributed mobility management includes:
- Step 261 A MN and P-D-MAG perform data (IP packet) transmission;
- Step 261B P-D-MAG and CN and IP packet transmission;
- Step 262 MN attaches or RS to N-D-MAG again;
- Step 263 The N-D-MAG registers the MN, that is, Registration;
- Step 264 The N-D-MAG sends an ePBU message to the F-D-MAG, informing the F-D-MAG, the continued use of the address of the MN, and the maintenance of the route optimization;
- Step 265 The F-D-MAG sends an ePBU message to the CN, where the ePBU message includes an address of the MN-ID and the N-D-MAG, and the purpose of sending the ePBU message is used to notify the CN of the establishment of the route optimization tunnel.
- the ROI may be set to 11 to notify the CN route optimization tunnel establishment, that is, to inform the CN, the N-D-MAG and the CN to establish route optimization;
- Step 266 The CN sends an ePBA response to the F-D-MAG.
- Step 267 The F-D-MAG sends an ePBA response to the N-D-MAG.
- Step 268 The N-D-MAG sends an RA to the MN;
- Step 269 The ND-MAG sends an ePBU message to the PD-MAG, where the ePBU message includes the MN-ID and the ROI, and the PD-MAG is notified to delete and establish on the PD-MAG. All tunnels related to MN-ID;
- Step 2610 The P-D-MAG sends an ePBA response to the N-D-MAG.
- Step 2611A MN and N-D-MAG transmit IP packet
- Step 261 IB N-D-MAG and CN transmit IP packet.
- the embodiment of the present invention solves the problem of long routing existing in the distributed anchor architecture in the DMM. Reduced delay and jitter.
- all the previously established tunnel information can be obtained through one signaling interaction, and it is not necessary to re-query the address of the anchor point where the CN is located each time, which can save signaling overhead;
- the old tunnel can be deleted through one signaling interaction, which saves signaling overhead.
- the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.
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Abstract
本发明实施例公开一种数据传输方法及装置,所述方法包括:当移动节点 MN 移动到当前分布式移动接入网关 N-D-MAG 时,所述 N-D-MAG 通知 MN 的初始分布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG 为 MN 分配的地址;所述 N-D-MAG 获取与所述 MN 进行通信的通信对端节点 CN当前所在的 D-MAG的地址;所述 N-D-MAG 与所述 D-MAG地址对应的 D-MAG建立路由优化隧道;所述 N-D-MAG 通过建立的所述路由优化隧道与所述 D-MAG 进行数据传输。本发明解决了 DMM 中分布式锚点的现有方案中,路由长的技术问题;以及在 DMM 分布式锚点架构下无法应用和信令开销大的技术问题。
Description
一种数据传输方法及装置
本申请要求于 2012年 6月 29日 提交中 国专利局、 申请号为 201210222319.X, 发明名称为"一种数据传输方法及装置"的中国专利申请的 优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域, 特别涉及一种数据传输方法方法及装 置。 背景技术
分布式移动管理 (DMM , Distributed Mobility Management ) 中, 锚点同时承担代理移动 IPv6 ( ΡΜΙΡνό , Proxy Mobile IPv6 ) 中的本地 移动锚点 (LMA, Local Mobility Anchor ) 和移动接入网关 (MAG, Mobile Access Gateway )的功能的方案称为完全分布式移动管理方案。 在完全分布式移动管理方案中, 通常采用分布式锚点技术, 而所述分 布式锚点是指: 当移动节点 (MN , Mobile Node ) 移动到一个新的接 入点时, 新产生的会话是由新的接入点分配地址前缀并进行锚定, 即 存在一个 M N有多条数据流同时锚定在不同的锚点上。
目前, 一种现有 DMM分布式锚点技术中, 当 MN移动到一个新 的接入点, 即新的锚点 (N-Anchor ) , 在原锚点 (即切换前的锚点) 上生成的会话, 如果需要保持, MN 在切换前锚点 (P-Anchor ) 上生 成的会话 (Old Session ) 由切换前锚点 (P-Anchor ) 通过隧道向当前 锚点( N-Anchor )进行转发; 当 MN再次移动到另一个新的接入点时, 重复执行上述过程, 从而延长了数据流的传输路径, 带来了延迟和抖 动。
另一种在现有的 PMIPv6 中, 采用了集中式的移动性管理进行路 由优化和本地化路由。 其发起路由优化和本地化路由的过程为: 本地 移动锚点 LMA ( MN ) 向对端移动锚点 LMA ( CN ) 发起路由优化触 发 ( RO Trigger ) 命令, 并告知本地移动接入网关 MAG(MN)的地址,
LMA ( CN ) 向对端移动接入网关 MAG ( CN )发起路由优化开始命令 (RO Init) , 然后, MAG(CN)同 MAG ( MN ) 建立隧道 ( RO Setup ) , 在隧道建立后, 进行数据传输。
而该现有技术在采用分布式锚点的架构中无法应用, 这个因为单 个 LMA无法维护 ΜΝ在多个锚点上生成的多个不同地址的会话。
假设其可以应用分布式锚点的架构中, 即每个锚点都看作为一个 LMA, ΜΝ在移动时可能在不同锚点上生成多个会话, 因此有多个路 由优化隧道存在。 当 ΜΝ 每次移动时, 路由优化隧道的维持都需要 LMA ( ΜΝ )向每一个 LMA ( CN )发起信令。 如果应用在分布式锚点 框架下, 在每次 ΜΝ移动时, 每一条流的锚点作为 ΜΝ的 LMA都需 要向每一个 LMA ( CN ) 发送路由优化过程。 但是, 在分布式锚点框 架下, 当 ΜΝ移动时, 可能存在多个 LMA ( ΜΝ ) , 因此需要发送多 对信令, 从而造成信令开销大的技术问题。
现有 DMM中分布式锚点的技术中, 需要将数据流通过原锚点转 发给当前锚点, 存在长路由的技术问题。 而现有的 ΡΜΙΡν6 中的路由 优化和本地化路由方案中, 在 DMM分布式锚点架构下无法应用, 即 使能应用, 也会导致信令开销大的技术问题。
发明内容
本发明实施例中提供一种数据传输方法及装置,以解决现有的 PMIPv6 中的路由优化和本地化路由技术中, 在 DMM分布式锚点架构下无法应用 和信令开销大的技术问题。
为解决上述问题, 本发明实施例提供一种数据传输方法, 所述方法包 括:
当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-M AG , 继续使用所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG获取与所述 MN进行通信的通信对端节点 CN当前所 在的 D-MAG的地址;
所述 N-D-MAG与所述 D-MAG地址对应的 D-MAG建立路由优化隧
道;
所述 N-D-MAG通过建立的所述路由优化隧道与所述 D-MAG进行数 据传输。
本发明实施例还提供一种数据传输方法, 所述方法包括:
当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-M AG时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-MAG,继续使用 所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG获取所述 MN切换前在分布式移动接入网关 P-D-MAG 上建立的路由隧道信息; 所述隧道信息包括: 全部 CN所在的 D-MAG地 址, 以及 MN-ID或 MN的地址前缀;
所述 N-D-MAG与所述 D-MAG地址建立路由维持优化隧道; 所述 N-D-MAG通过建立的所述路由维持优化隧道与所述 D-MAG进 行数据传输。
本发明实施例还提供一种数据传输方法, 所述方法包括:
当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移,并从所述 P-D-MAG中获取与所述 MN对应的 CN 当前所在的 N-D-MAG的地址;
所述 N-D-MAG与 CN当前所在 D-MAG地址对应的 D-MAG建立路由 维持优化隧道;
所述 MN当前所在的 N-D-MAG通过建立的所述路由维持优化隧道与 CN当前所在的 D-MAG进行数据传输。
本发明实施例提供一种数据传输方法, 所述方法包括:
当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知所述 MN的初始分布式移动接入网关 F-D-MAG继续使用所 述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG向与所述 MN通信的 CN告知路由优化的执行, 并与 所述 CN建立路由优化的双向隧道;
所述 N-D-MAG通过建立的双向隧道与所述 CN进行数据传输。
本发明实施例还提供一种数据传输方法, 所述方法包括:
当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-MAG,继续使用 所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG通知所述 MN切换前的分布式移动接入网关 P-D-MAG 删除与 MN相关的隧道;
所述 N-D-MAG将 MN-ID和 MN当前所在的 N-D-MAG地址通知与 MN通信的 CN;
所述 N-D-MAG与所述 CN建立路由维持优化隧道;
所述 N-D-MAG通过建立的所述路由维持优化隧道与所述 CN进行数 据传输。
本发明实施例还提供一种数据传输方法, 所述方法包括:
当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移;
所述 N-D-MAG与 CN的地址对应的 CN建立路由优化隧道; 所述 N-D-MAG通过建立的所述路由优化维持隧道与 CN进行数据传 输。
本发明实施例提供一种数据传输方法, 所述方法包括:
当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知所述 MN的初始分布式移动接入网关 F-D-MAG, 继续使用 所述 F-D-MAG为 MN分配的地址和发起路由优化; 以便于所述 F-D-MAG 告知与 MN通信的 CN, 所述 N-D-MAG与 CN建立路由优化隧道, 并将 MN-ID和 N-D-MAG地址告知 CN;
所述 N-D-MAG通过建立的路由优化隧道与所述 CN进行数据传输。 本发明实施例还提供一种数据传输方法, 所述方法包括:
当移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所 述 N-D-MAG 通知初始分布式移动接入网关 F-D-MAG , 继续使用所述 F-D-MAG为 MN分配的地址和路由优化的维持; 以便于所述 F-D-M AG告 知与 MN通信的 CN, 所述 N-D-MAG与 CN维持路由优化隧道, 并将所述 N-D-MAG的地址告知所述 CN;
所述 N-D-MAG通过建立的路由优化隧道与所述 CN进行数据传输。 相应的, 本发明实施例提供一种数据传输的装置, 包括:
通知单元, 用于在检测到有移动节点 MN接入时, 通知所述 MN的初 始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址;
获取单元, 用于获取与所述 MN进行通信的通信对端节点 CN当前所 在的 D-MAG的地址;
建立单元, 用于与所述 D-MAG地址对应的 D-MAG建立路由优化隧 道;
传输单元, 用于通过建立的所述路由优化隧道与所述 D-MAG进行数 据传输。
本发明实施例提供一种数据传输装置, 包括:
通知单元, 用于在检测到有移动节点 MN接入时, 通知 MN的初始分 布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址; 获取单元,用于获取所述 MN切换前在分布式移动接入网关 P-D-MAG 上建立的路由隧道信息; 所述隧道信息包括: 全部 CN所在的 D-MAG地 址, 以及 MN-ID或 MN的地址前缀;
建立单元, 用于与所述 D-MAG地址建立路由维持优化隧道; 传输单元, 用于通过建立的所述路由维持优化隧道与所述 D-MAG进 行数据传输。
本发明实施例提供一种数据传输装置, 包括:
通知单元, 用于在检测到有移动节点 MN接入时, 通知初始分布式移 动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
请求单元,用于请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移;
获取单元, 用于从所述 P-D-MAG中获取与所述 MN通信的 CN当前 所在的 N-D-MAG的地址;
建立单元,用于与 CN当前所在 D-MAG地址对应的 D-MAG建立路由 维持优化隧道;
传输单元, 用于通过建立的所述路由维持优化隧道与 CN 当前所在的
D-MAG进行数据传输。
本发明实施例提供一种数据传输装置, 包括:
通知单元, 用于在检测到有移动节点 MN接入时, 通知所述 MN的初 始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址;
建立单元, 用于向与 MN通信的 CN告知路由优化的执行, 并与所述 CN建立路由优化的双向隧道;
传输单元, 用于所述 N-D-MAG通过建立的双向隧道与所述 CN进行 数据传输。
本发明实施例还提供一种数据传输装置, 包括:
第一通知单元, 用于检测到移动节点 MN接入时, 通知所述 MN的初 始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址;
第二通知单元, 用于通知所述 MN 切换前的分布式移动接入网关 P-D-MAG删除与所述 MN相关的隧道;
第三通知单元,用于将 MN-ID和 MN当前所在的 N-D-MAG的地址通 知与 MN通信的 CN;
建立单元, 用于与所述 CN建立路由维持优化隧道;
传输单元, 用于通过建立的所述路由维持优化隧道与所述 CN进行数 据传输。
本发明实施例还提供一种数据传输装置, 包括:
通知单元, 用于检测到移动节点 MN接入时, 通知 MN的初始分布式 移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址; 请求单元,用于请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移;
建立单元, 用于与 CN的地址对应的 CN建立路由优化隧道; 传输单元, 用于通过建立的所述路由优化维持隧道与 CN进行数据传 输。
本发明实施例还提供一种数据传输装置, 包括:
通知单元, 用于检测到移动节点 MN接入时, 通知所述 MN的初始分 布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址 和发起路由优化; 以便于所述 F-D-MAG告知与 MN通信的 CN, 所述 N-D-MAG与 CN建立路由优化隧道, 并将 MN-ID和 N-D-MAG地址告知 CN;
传输单元, 用于通过所述路由优化隧道与所述 CN进行数据传输。 本发明实施例还提供一种数据传输装置, 包括:
通知单元, 用于检测到移动节点 MN接入时, 通知所述 MN的初始分 布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址 和路由优化的维持; 以便于所述 F-D-MAG告知与 MN通信的 CN, 所述数 据传输装置与 CN维持路由优化隧道, 并将所述数据传输装置的地址告知 所述 CN;
传输单元, 用于通过建立的路由优化隧道与所述 CN进行数据传输。 由上述技术方案可知, 本发明实施例中主要涉及路由优化发起和维持 路由优化阶段,其中,路由优化发起节点,即 MN当前接入的所述 N-D-MAG 通过与 MN通信的 CN当前所在的 D-MAG直接建立路由优化隧道, 并通 过该路由优化隧道进行数据传输, 从而解决了 DMM中分布式锚点架构下 存在路由长的技术问题, 同时也降低了延迟和抖动; 维持路由优化阶段, 可以通过一次信令交互可以获得之前建立的全部隧道信息, 而不需要每次 都去重新查询 CN所在的锚点的地址, 从而节省了信令开销。 进一步, 在 维持路由优化阶段, 还通过一次信令交互可以删除旧的隧道, 也节省了信 令开销。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例中所需要使用的附图作筒单地介绍, 显而易见地, 下面描述中的附
图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出 创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的一种数据传输方法的流程图;
图 2为本发明实施例提供的第二种数据传输方法的流程图;
图 3为本发明实施例提供的第三种数据传输方法的流程图;
图 4为本发明实施例提供的第四种数据传输方法的流程图;
图 5为本发明实施例提供的第五种数据传输方法的流程图;
图 6为本发明实施例提供的第六种数据传输方法的流程图;
图 7为本发明实施例提供的第七种数据传输方法的流程图;
图 8为本发明实施例提供的第八种数据传输方法的流程图;
图 9为本发明实施例提供的一种数据传输装置的结构示意图; 图 10为本发明实施例提供的第二种数据传输装置的结构示意图; 图 11为本发明实施例提供的第三种数据传输装置的结构示意图; 图 12为本发明实施例提供的第四种数据传输装置的结构示意图; 图 13为本发明实施例提供的第五种数据传输装置的结构示意图; 图 14为本发明实施例提供的第六种数据传输装置的结构示意图; 图 15为本发明实施例提供的一种分布式移动管理的系统架构示意图; 图 16 为本发明实施例提供的一种分布式移动管理中路由优化发起的 信令流程图;
图 17 为本发明实施例提供的一种分布式移动管理中路由优化的维持 的信令流程图;
图 18 为本发明实施例提供的一种分布式移动管理中路由优化的维持 多隧道的信令流程图;
图 19为本发明实施例提供的另一种路由优化的维持信令的流程图; 图 20 为本发明实施例提供的另一种路由优化的维持多隧道的信令流 程图;
图 21 为本发明实施例提供的另一种分布式移动管理的系统架构示意 图;
图 22, 为本发明实施例提供的又一种路由优化发起的信令流程图;
图 23 为本发明实施例提供的又一种分布式移动管理中路由优化的维 持的信令流程图;
图 24 为本发明实施例提供又一种分布式移动管理中路由优化的维持 的信令流程图;
图 25为本发明实施例提供的一种路由优化发起的信令流程图; 图 26 为本发明实施例提供的一种分布式移动管理中路由优化的维持 的信令流程图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进 行清楚、 完整的描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
在参阅下述实施例之前, 先介绍下述概念:
本发明实施例中的分布式锚点称为分布式移动接入网关 ( D-MAG , Distributed Mobile Access Gateway ), 其中,
F-D-MAG, First D-MAG: 会话初始发起时 MN接入的 D-MAG, 由该 D-MAG进行 IPv6地址前缀分配;
P-D-MAG, Past D-MAG: MN切换前接入的 D-MAG;
N-D-MAG, New D-MAG: MN当前接入的 D-MAG。
请参阅图 1 , 为本发明实施例提供的一种数据传输方法的流程图; 所 述方法包括:
步骤 101 : 当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG 时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-MAG, 继续 使用所述 F-D-MAG为 MN分配的地址;
可选的,可以通过增强代理绑定更新消息 ePBU/ePBA中的路由优化指 示 ROI通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG 为 MN分配的地址。
步骤 102: 所述 N-D-MAG获取与所述 MN进行通信的通信对端节点
CN当前所在的 D-MAG的地址;
其中,一种获取的方式为: 所述 N-D-MAG向所述 F-D-MAG发送查询 CN当前所在 D-MAG的地址的请求, 所述请求中包括所述 MN-ID以及路 由优化指示;所述 N-D-MAG接收所述 F-D-MAG发送的包括 CN当前所在 D-MAG的地址的响应。 所述请求可以是增强代理绑定更新消息 ePBU等。
步骤 103: 所述 N-D-MAG与所述 D-MAG地址对应的 D-MAG建立路 由优化隧道;
其中, 建立路由优化隧道的过程为: 所述 N-D-MAG向 D-MAG地址 对应的 D-MAG 发送建立路由优化隧道请求, 所述请求中包括所述 N-D-MAG的地址以及路由优化指示;所述 N-D-MAG接收 D-MAG发送的 建立路由优化隧道响应。
其中, 所述查询 CN当前所在 D-MAG的地址的请求为增强代理绑定 更新 ePBU消息,所述 ePBU消息包括 CN当前所在 D-MAG的地址的响应 为增强代理绑定应答 ePBA响应; 所述建立路由优化隧道请求为 ePBU消 息, 所述建立路由优化隧道响应为 ePBA响应。
步骤 104 : 所述 N-D-MAG 通过建立的所述路由优化隧道与所述 D-MAG进行数据传输。
本发明实施例中主要涉及路由优化发起, 即 MN 当前接入的所述 N-D-MAG通过与 MN通信的 CN当前所在的 D-MAG直接建立路由优化隧 道, 并通过该路由优化隧道进行数据传输, 从而解决了 DMM中分布式锚 点架构下存在路由长的技术问题, 同时也降低了延迟和抖动。
还请参阅图 2, 为本发明实施例提供的第二中数据传输方法的流程图, 该实施例中, 在图 1实施例的基础上, 包括:
步骤 201 : 当所述移动节点 MN 移动到下一个分布式移动接入网关 N-D-MAG 时, 所述 N-D-MAG 通知 MN 的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
其中, 该步骤, 可以通过增强代理绑定更新消息中的路由优化指示通 知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分 配的地址。
步骤 202: 所述 N-D-MAG获取所述 MN切换前在分布式移动接入网
关 P-D-MAG上建立的路由隧道信息; 所述隧道信息包括: 全部 CN所在的 D-MAG地址, 以及 MN-ID或 MN的地址前缀;
其中,一种获取的方式包括: 所述 N-D-MAG向所述 P-D-MAG发送增 强代理绑定更新 ePBU消息, 所述 ePBU消息包括: 请求与 MN通信的全 部 CN所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID或 MN的地址 前缀; 所述 N-D-MAG接收所述 P-D-MAG增强代理绑定应答 ePBA响应, 所述 ePBA响应包括: 所述 CN所在的 D-MAG地址, 以及与所述 CN对应 的 MN-ID或 MN的地址前缀。
步骤 203:所述 N-D-MAG与所述 D-MAG地址建立路由维持优化隧道; 其中, 路由维持优化隧道的建立过程详见上述实施例的路由优化隧道 的建立过程, 在此不再赘述。
步骤 204: 所述 N-D-MAG通过建立的所述路由维持优化隧道与所述 D-MAG进行数据传输。
其中, 在该实施例中, 对于多隧道的情况, 可以通过步骤 202—次获 得多 个隧道的信息, 即 N-D-MAG(MN)向 P-D-MAG(MN)发送 ePBU(ROI=00)请求之前在 P-D-MAG上建立的隧道信息, 其中包括与 MN 通信的所有 CN所在的 D-MAG的地址和其相应的 MN的地址前缀。 也就 是说, 通过这一次的信令交互可以获得之前建立的全部的隧道信息, 从而 达到节省信令开销的目的。
可选的, P-D-MAG(MN)在返回 ePBA之后, 删除之前建立的隧道, 或 等待其自动过期。
本发明实施例中, 主要涉及路由优化隧道在移动节点 MN的移动过程 中的维持, 在维持路由优化阶段, 可以通过一次信令交互可以获得之前建 立的全部隧道信息, 而不需要每次都去重新查询 CN所在的锚点的地址, 从而节省了信令开销。 进一步, 在维持路由优化阶段, 还通过一次信令交 互可以删除旧的隧道, 也节省了信令开销。
还请参阅图 3 , 为本发明实施例提供的第三种数据传输方法的流程图, 该实施例也在图 1所示实施例的基础上, 所述方法包括:
步骤 301 : 当所述移动节点 MN 移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG,
继续使用所述 F-D-MAG为 MN分配的地址;
步骤 302: 所述 N-D-MAG请求所述 MN切换前的分布式移动接入网 关 P-D-MAG进行路由优化隧道转移, 并从所述 P-D-MAG 中获取与所述 MN对应的 CN当前所在的 N-D-MAG的地址;
其中, 该步骤具体包括: 所述 N-D-MAG向所述 MN切换前的分布式 移动接入网关 P-D-MAG发送增强代理绑定更新 ePBU消息,请求路由优化 隧道转移, 所述 ePBU消息包括: MN-ID和 MN当前所在的 N-D-MAG的 地址; 所述 P-D-MAG 将 ePBU 消息发送给一个或多个 CN 所在的 N-D-MAG, 以便于一个或多个 CN 所在的 N-D-MAG知道 MN 所在的 N-D-MAG 的地址; 所述 P-D-MAG 接收所述一个或多个 CN 所在的 N-D-MAG发送的增强代理绑定应答 ePBA响应, 所述 ePBA响应包括: 与 所述 MN通信的 CN当前所在的 N-D-MAG的地址; 所述 N-D-MAG接收 到所述 P-D-MAG转发的所述 ePBA响应。
步骤 303:所述 MN当前所在的 N-D-MAG与 CN当前所在 D-MAG地 址对应的 D-MAG建立路由维持优化隧道;
步骤 304: 所述 MN当前所在的 N-D-MAG通过建立的所述路由维持 优化隧道与 CN当前所在的 D-MAG进行数据传输。
也就是说, 本实施例中, 当 MN再次移动到另外一个 D-MAG时, 新 接入的 D-MAG称为 N-D-MAG , 其路由优化的维持过程为:
N-D-MAG(MN)向 F-D-MAG(MN)发送 ePBU(ROI=01)请求地址继续使 用, N-D-MAG(MN)向 P-D-MAG(MN)发送 ePBU(ROI=00)请求路由优化隧 道的转移; P-D-MAG(MN)根据在其上已经建立的隧道情况向 CN所在的 D-MAG(D-MAG(CN))告知 N-D-MAG(MN)的地址, 即 MN的新转交地址; P-D-MAG(MN)返回 ePBA给 N-D-MAG(MN)来告知所有 CN的 D-MAG地 址,进而使得 N-D-MAG(MN)和 N-D-MAG(CN)之间可以直接通过路由优化 隧道进行数据传输, 达到了维持路由优化的目的。
还请参阅图 4, 为本发明实施例提供的第四种数据传输方法的流程图, 所述方法包括:
步骤 401 : 当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG 时, 所述 N-D-MAG通知所述 MN的初始分布式移动接入网关 F-D-MAG
继续使用所述 F-D-MAG为 MN分配的地址;
其中, 可以通过 ePBU 通知所述 MN 的初始分布式移动接入网关 F-D-MAG继续使用所述 F-D-MAG为 MN分配的地址。
步骤 402:所述 N-D-MAG向与所述 MN通信的 CN告知路由优化的执 行, 并与所述 CN建立路由优化的双向隧道;
步骤 403:所述 N-D-MAG通过建立的双向隧道与所述 CN进行数据传 输。
可选的, 所述 CN可以为固定终端或内容服务器, 且具备建立隧道的 信令交互能力。
还请参阅图 5 , 为本发明提供的第五种数据传输方法的流程图, 该方 法在上述图 4实施例的基础上, 还包括:
步骤 501 : 当所述移动节点 MN 移动到下一个分布式移动接入网关 N-D-MAG 时, 所述 N-D-MAG 通知 MN 的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
步骤 502: 所述 N-D-MAG通知所述 MN切换前的分布式移动接入网 关 P-D-MAG删除与 MN相关的隧道;
步骤 503: 所述 N-D-MAG将 MN-ID和 MN当前所在的 N-D-MAG地 址通知与 MN通信的 CN;
步骤 504: 所述 N-D-MAG与所述 CN建立路由维持优化隧道; 步骤 505: 所述 N-D-MAG通过建立的所述路由维持优化隧道与所述
CN进行数据传输。
还请参阅图 6, 为本发明实施例提供的第六种数据传输方法的流程图, 所述方法在图 4实施例的基础上, 还包括:
步骤 601 : 当所述移动节点 MN 移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
步骤 602: 所述 N-D-MAG请求所述 MN切换前的分布式移动接入网 关 P-D-MAG进行路由优化隧道转移;
该步骤具体包括: 所述 N-D-MAG向所述 MN切换前的分布式移动接 入网关 P-D-MAG发送增强代理绑定更新 ePBU消息,请求路由优化隧道转
移, 所述 ePBU消息包括: MN-ID和 MN当前所在的 N-D-MAG的地址; 所述 P-D-MAG 向所有与 MN 通信的 CN发送 ePBU 消息, 告知所述 N-D-MAG与 CN维持路由优化状态; 所述 P-D-MAG接收所述 CN发送的 增强代理绑定应答 ePBA响应;所述 N-D-MAG接收到所述 P-D-MAG发送 的所述 ePBA响应。
步骤 603:所述 N-D-MAG与 CN的地址对应的 CN建立路由优化隧道; 步骤 604:所述 N-D-MAG通过建立的所述路由优化维持隧道与 CN进 行数据传输。
可选的, 所述方法还可以包括: 在所述 P-D-MAG向所有与 MN通信 的 CN发送 ePBU消息后, 删除之前与 MN建立的隧道。
可选的, 所述 CN为固定终端或内容服务器, 且具备建立隧道的信令 交互能力。
还请参阅图 7, 为本发明实施例提供的第七种数据传输方法的流程图, 所述方法包括:
步骤 701 : 当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG 时, 所述 N-D-MAG通知所述 MN的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址和发起路由优化; 以便于所述 F-D-MAG告知与 MN通信的 CN, 所述 N-D-MAG与 CN建立路由优化隧 道, 并将 MN-ID和 N-D-MAG地址告知 CN;
步骤 702:所述 N-D-MAG通过建立的路由优化隧道与所述 CN进行数 据传输。
还请参阅图 8, 为本发明实施例提供的第八种数据传输方法的流程图, 该实施例在图 7所示实施例的基础上, 还包括:
步骤 801 : 当移动节点 MN 移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址和路由优化的维持; 以便于所 述 F-D-MAG告知与 MN通信的 CN, 所述 N-D-MAG与 CN维持路由优化 隧道, 并将所述 N-D-MAG的地址告知所述 CN;
步骤 802:所述 N-D-MAG通过建立的路由优化隧道与所述 CN进行数 据传输。
可选的, 所述方法还可以包括: 所述 N-D-MAG告知所述 ΜΝ切换前 的分布式移动接入网关 P-D-MAG删除与所述 ΜΝ之前建立的隧道。
基于上述方法的实现过程, 本发明实施例还提供一种数据传输装置, 其结构示意图详见图 9, 所述数据传输装置包括: 通知单元 91 , 获取单元 92, 建立单元 93和传输单元 94, 其中, 所述通知单元 91 , 用于在检测到 有移动节点 ΜΝ 接入时, 通知所述 ΜΝ 的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 ΜΝ分配的地址, 具体用于通过增 强代理绑定更新消息中的路由优化指示通知初始分布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址;所述获取单元 92, 用于获取与所述 MN进行通信的通信对端节点 CN当前所在的 D-MAG的 地址; 所述建立单元 93 , 用于与所述 D-MAG地址对应的 D-MAG建立路 由优化隧道; 所述数据传输单元 94, 用于通过建立的所述路由优化隧道与 所述 D-MAG进行数据传输。
其中, 所述获取单元包括: 第一发送单元和第一接收单元, 所述第一 发送单元,用于向所述 F-D-MAG发送查询 CN当前所在 D-MAG的地址的 请求,所述请求中包括所述 MN-ID以及路由优化指示;所述第一接收单元, 用于接收所述 F-D-MAG发送的包括 CN当前所在 D-MAG的地址的响应。
所述建立单元包括: 第二发送单元和第二接收单元, 其中, 所述第二 发送单元, 用于向 D-MAG地址对应的 D-MAG发送建立路由优化隧道请 求, 所述请求中包括所述 N-D-MAG的地址以及路由优化指示; 所述第二 接收单元, 用于接收 D-MAG发送的建立路由优化隧道响应。
可选的, 所述装置可以集成在 MN当前接入或附着的分布式移动接入 网关 N-D-MAG中, 也可以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
本发明实施例还提供一种数据传输装置, 所述数据传输装置在上述装 置的基础上, 包括: 通知单元, 获取单元, 建立单元和传输单元, 其中, 所述通知单元, 用于在检测到有移动节点 MN接入时, 通知 MN的初始分 布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址, 具体用于通过增强代理绑定更新消息中的路由优化指示通知初始分布式移 动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址; 所述
获取单元, 用于获取所述 MN切换前在分布式移动接入网关 P-D-MAG上 建立的路由隧道信息; 所述隧道信息包括: 全部 CN所在的 D-MAG地址, 以及 MN-ID或 MN的地址前缀; 所述建立单元, 用于与所述 D-MAG地址 建立路由维持优化隧道; 所述传输单元, 用于通过建立的所述路由维持优 化隧道与所述 D-MAG进行数据传输。
其中, 所述获取单元包括: 发送单元和接收单元, 其中, 所述发送单 元, 用于向所述 P-D-MAG发送增强代理绑定更新 ePBU消息, 所述 ePBU 消息包括: 请求与 MN通信的全部 CN所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID 或 MN 的地址前缀; 所述接收单元, 用于接收所述 P-D-MAG增强代理绑定应答 ePBA响应, 所述 ePBA响应包括: 所述 CN 所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID或 MN的地址前缀。
可选的, 所述装置可以集成分布式移动接入网关 N-D-MAG中, 也可 以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
还请参阅图 10, 为本发明实施例提供第二种数据传输装置的结构示意 图, 该实施例基于图 9所述实施例的基础上, 包括: 通知单元 10, 请求单 元 11 , 获取单元 12, 建立单元 13和传输单元 14, 其中, 所述通知单元 10, 用于在检测到有移动节点 MN 接入时, 通知初始分布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址;所述请求单元 11 , 用于请求所述 MN切换前的分布式移动接入网关 P-D-MAG进行路由优化 隧道转移; 所述获取单元 12 , 用于从所述 P-D-MAG中获取与所述 MN通 信的 CN当前所在的 N-D-MAG的地址; 所述建立单元 13 , 用于与 CN当 前所在 D-MAG地址对应的 D-MAG建立路由维持优化隧道; 所述传输单 元 14, 用于通过建立的所述路由维持优化隧道与 CN当前所在的 D-MAG 进行数据传输。
其中, 所述请求单元包括: 发送单元和接收单元, 其中, 所述发送单 元, 用于向所述 MN切换前的分布式移动接入网关 P-D-MAG发送增强代 理绑定更新 ePBU消息, 请求路由优化隧道转移, 所述 ePBU消息包括: MN-ID和 MN当前所在的 N-D-MAG的地址;以便于所述 P-D-MAG将 ePBU 消息发送给一个或多个 CN所在的 N-D-MAG, 以使一个或多个 CN所在的
N-D-MAG知道 MN所在的 N-D-MAG的地址; 所述接收单元,用于接收所 述 P-D-MAG发送的所述 ePBA响应, 所述 ePBA响应为一个或多个 CN所 在的 N-D-MAG发送的增强代理绑定应答 ePBA响应, 包括: 与所述 MN 通信的 CN当前所在的 N-D-MAG的地址。
可选的, 所述装置可以集成分布式移动接入网关 N-D-MAG中, 也可 以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
还请参阅图 11 , 为本发明实施例提供第三种数据传输装置的结构示意 图, 所述装置包括: 通知单元 111 , 建立单元 112和传输单元 113 , 其中, 所述通知单元 111 , 用于在检测到有移动节点 MN接入时, 通知所述 MN 的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分 配的地址; 所述建立单元 112 ,用于向与 MN通信的 CN告知路由优化的执 行, 并与所述 CN建立路由优化的双向隧道; 所述传输单元 113 , 用于所述 N-D-MAG通过建立的双向隧道与所述 CN进行数据传输。
在该实施例中,所述与 MN通信的 CN可以为固定终端或内容服务器, 且具备建立隧道的信令交互能力。
可选的, 所述装置可以集成分布式移动接入网关 N-D-MAG中, 也可 以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
还请参阅图 12, 为本发明实施例提供第四种数据传输装置的结构示意 图, 该实施例在图 11所述实施例的基础上, 所述装置包括: 第一通知单元 121 ,第二通知单元 122和第三通知单元 123 ,建立单元 124和传输单元 125 , 其中, 所述第一通知单元 121 , 用于检测到移动节点 MN接入时, 通知所 述 MN的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址; 所述第二通知单元 122,用于通知所述 MN切换前的分布 式移动接入网关 P-D-MAG删除与所述 MN相关的隧道; 所述第三通知单 元 123 , 用于将 MN-ID和 MN当前所在的 N-D-MAG的地址通知与 MN通 信的 CN; 所述建立单元 124 , 用于与所述 CN建立路由维持优化隧道; 所 述传输单元 125 ,用于通过建立的所述路由维持优化隧道与所述 CN进行数
据传输。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
还请参阅图 13 , 为本发明实施例提供第五种数据传输装置的结构示意 图, 该实施例在图 11所述实施例的基础上, 所述装置包括: 通知单元 131 , 请求单元 132, 建立单元 133和传输单元 134, 其中, 所述通知单元 131 , 用于检测到移动节点 MN接入时, 通知 MN 的初始分布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址;所述请求单元 132, 用于请求所述 MN切换前的分布式移动接入网关 P-D-MAG进行路由优化 隧道转移; 所述建立单元 133 , 用于与 CN的地址对应的 CN建立路由优化 隧道; 所述传输单元 134, 用于通过建立的所述路由优化维持隧道与 CN进 行数据传输。
其中, 所述请求单元包括: 发送单元和接收单元, 其中, 所述发送单 元, 用于向所述 MN切换前的分布式移动接入网关 P-D-MAG发送增强代 理绑定更新 ePBU消息, 请求路由优化隧道转移, 所述 ePBU消息包括: MN-ID和 MN当前所在的 N-D-MAG的地址; 以便于所述 P-D-MAG向所 有与 MN通信的 CN发送 ePBU消息,告知所述 N-D-MAG与 CN维持路由 优化状态; 所述接收单元,用于通过所述 P-D-MAG接收所述 CN发送的增 强代理绑定应答 ePBA响应。
可选的,所述方法还可以进一步包括:删除单元,用于在所述 P-D-MAG 向所有与 MN通信的 CN发送 ePBU消息后,删除之前与 MN建立的隧道。
可选的, 所述装置可以集成分布式移动接入网关 N-D-MAG中, 也可 以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
还请参阅图 14, 为本发明实施例提供第六种数据传输装置的结构示意 图, 所述装置包括: 通知单元 141 和传输单元 142, 其中, 所述通知单元 141 ,用于检测到移动节点 MN接入时,通知所述 MN的初始分布式移动接 入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址和发起路由 优化; 以便于所述 F-D-MAG告知与 MN通信的 CN, 所述 N-D-MAG与 CN建立路由优化隧道, 并将 MN-ID和 N-D-MAG地址告知 CN; 所述传输
单元 142, 用于通过所述路由优化隧道与所述 CN进行数据传输。
可选的, 所述装置可以集成分布式移动接入网关 N-D-MAG中, 也可 以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
本发明实施例还提供一种数据传输装置,所述实施例在图 14实施例的 基础上, 所述装置包括: 通知单元和传输单元, 其中, 所述通知单元, 用 于检测到移动节点 MN接入时, 通知所述 MN的初始分布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址和路由优化的维持; 以便于所述 F-D-MAG告知与 MN通信的 CN, 所述数据传输装置与 CN维 持路由优化隧道, 并将所述数据传输装置的地址告知所述 CN; 所述传输单 元, 用于通过建立的路由优化隧道与所述 CN进行数据传输。
可选的, 所述装置还可以进一步包括: 删除单元, 用于通知所述 MN 切换前的分布式移动接入网关 P-D-MAG删除与所述 MN之前建立的隧道。
可选的, 所述装置可以集成分布式移动接入网关 N-D-MAG中, 也可 以独步部署。
所述装置中各个单元的功能和作用的实现过程, 详见上述方法中对应 的实现过程, 在此不再赘述。
为了便于本领域技术人员的理解, 下面以具体的应用实例来说明。 实施例一
请参阅图 15 , 为本发明实施例提供的一种分布式移动管理的系统架构 示意图; 在该实施例中, MN、 CN1和 CN2都位于 D-MAG之下, MN由 F-D-MAG(MN)移动到 N-D-MAG(MN), 如图中虚线所示, N-D-MAG(MN) 与 F-D-MAG(MN), 以及 CN当前所在的 D-MAG(CN)进行交互, 实现分布 式移动管理的路由优化, 该路由优化包括两个步骤, 步骤一为路由优化的 发起; 步骤二为路由优化在 MN移动过程中的维持, 其步骤一的具体的过 程详见图 16所示实施例, 步骤二的过程详见图 17和图 18所示实施例。
请参阅图 16, 为本发明实施例提供的一种分布式移动管理中路由优化 发起的信令流程图, 在该实施例中, MN和 CN都位于 D-MAG之下。 在该 实施例中,初始会话在 F-D-MAG(MN)上产生, 并由其分配 IPv6地址前缀;
之后, 当 MN移动到 N-D-MAG(MN)后, 其具体的过程包括: 步骤 161 : MN向 N-D-MAG(MN)发送附着( Attach )请求或路由( RS, Route Solicitation ) 请求; 也就是说, MN 由 F-D-MAG(MN)移动到 N-D-MAG(MN), 即附着到 N-D-MAG(MN)上。
步骤 162: N-D-MAG(MN)对该 MN进行注册登记, 即 Registration; 步骤 163 : N-D-MAG(MN)向 F-D-MAG(MN)发送增强代理绑定更新 ePBU消息,其目的为声明在 F-D-MAG(MN)上分配的该 MN的地址仍在使 用; 其中, 在该消息中包括 MN-ID和路由优化指示 ROI。 可选的, 可以设 置路由优化指示 ROI=01 , 来表示在 F-D-MAG(MN)上分配的该 MN的地址 仍在使用;
步骤 164: F-D-MAG(MN) 向 N-D-MAG(MN)发送包括增强代理绑定 应答 ePBA响应; 该应答响应中也包括 MN-ID和 ROI; 可选的, 可以将 ROI标识设为 01 , 即 ROI=01; 声明为 MN分配的地址仍可使用;
步骤 165: N-D-MAG(MN)向 F-D-MAG(CN)发送 ePBU消息, 该息中 包括 N-ID 和 ROI; 请求查询 CN当前所在的 D-MAG(CN)地址, 可选的, 通过将 ROI标识设为 10,表示请求查询 CN当前所在的 D-MAG(CN)地址; 其中,发往 F-D-MAG(CN)的消息可以通过发往 MN上行分组中目的地 址的方式实现。
步骤 166: F-D-MAG(CN)向 N-D-MAG(MN)发送 ePBA响应, 该响应 中包括 CN当前所在的 D-MAG(CN)地址; 可选的, 可以设置 ROI=10, 表 示 CN当前所在的 D-MAG(CN)地址;
步骤 167: N-D-MAG(MN)向 D-MAG(CN)发送 ePBU消息, 请求建立 路由优化隧道, 该消息中包括 N-D-MAG(MN)的地址和 ROI; 可选的, 可 以设置 ROI=ll , 来请求建立路由优化隧道;
步骤 168: D-MAG(CN)向 N-D-MAG(MN)发送 ePBA响应, 即建立路 由优化隧道; 可选的, 可以设置 ROI=ll表示建立路由优化隧道;
也就是说, 步骤 167和步骤 168通过 ePBU(ROI=ll)/ ePBA(ROI=ll)这 对信令,建立 N-D-MAG(MN)与 D-MAG(CN)之间的路由优化隧道, 即通过 信令交互来执行路由优化过程;
步骤 169 : N-D-MAG(MN)向 MN 向发送路由通告 ( RA , Route
Advertisement );
步骤 1610A: MN与 N-D-MAG(MN)进行数据传输; 即传递 IP packet ; 步骤 1610B: N-D-MAG(MN) 与 D-MAG(CN)通过建立的路由优化隧 道进行数据传输;
步骤 1610C: D-MAG(CN)与 CN进行数据传输。
请参阅图 17, 为本发明实施例提供的一种分布式移动管理中路由优化 的维持的信令流程图, 在该实施例中, MN和 CN都位于 D-MAG之下; 当 MN再次移动到另外一个 D-MAG时, 新接入的 D-MAG称为 N-D-MAG, MN再次移动到 N-D-MAG之前接入的网关称为: P-D-MAG(MN) , 其具体 包括:
步骤 171 A: MN与 P-D-MAG(MN)进行数据 ( IP packet )传输; 步骤 171B: P-D-MAG(MN)与 CN当前的 D-MAG进行数据传输; 步骤 171C: D-MAG与 CN进行数据传输;
步骤 172: MN再次移动到 N-D-MAG ( MN ); 即 MN再次 Attach或 RS到 N-D-MAG ( MN )上;
步骤 173: N-D-MAG(MN)对该 MN进行注册登记, 即 Registration; 步骤 174: N-D-MAG(MN)向 F-D-MAG(MN)发送 ePBU消息, 请求为 MN分配的地址继续使用; 其中, 在该消息中包括 MN-ID和 ROI, 在该实 施例中,可以通过设置 ROI=01 ,来表示在 F-D-MAG(MN)1上分配的该 MN 的地址仍在使用。 该步骤为可选步骤。
步骤 175: F-D-MAG(MN) 向 N-D-MAG(MN)发送 ePBA响应; 该应答 响应中也包括 MN-ID和 ROI, 可选的, 在该应答响应中可以将 ROI标识 设为 01 , 表示继续使用为 MN分配的地址;
步骤 176: N-D-MAG(MN)向 P-D-MAG(MN)发送 ePBU消息, 其中, 所述 ePBU消息包括 MN-ID和 ROI;请求在 P-D-MAG上建立的隧道信息, 所述隧道信息包括与 MN通信的所有 CN所在的 D-MAG的地址, 以及相 应的 MN-ID或 MN的地址前缀;
可选的, 通过设置 ROI=00来请求在 P-D-MAG上建立的隧道信息; 其 中, 该实施例中, 其中发往 F-D-MAG(CN)2的消息可以通过发往 MN上行 分组中目的地址的方式实现。
步骤 177: P-D-MAG(MN) 向 N-D-MAG(MN)发送 ePBA响应,所述响 应中包括与 MN通信的所有 CN所在的 D-MAG的地址,以及相应的 MN-ID 或 MN的地址前缀; 本实施例以一个 CN所在的 D-MAG的地址为例, 即 存在一个隧道的情况; 而对于多隧道的情况, 如下图 18所示;
可选的, 可以通过设置 ROI=00 , 来指示全部 CN所在的 D-M AG的地 址, 以及相应的 MN-ID或 MN的地址前缀。
在步骤 176和步骤 177中,N-D-MAG(MN)通过这一次的信令交互可以 获得之前建立的全部的隧道信息, 这样以来可以减少信令开销。
可选的, P-D-MAG(MN)在返回 ePBA之后,可以删除之前建立的隧道, 或等待其自动过期。
步骤 178 : N-D-MAG(MN)在获得之前的隧道信息之后, 向这些 D-MAG(CN)发送 ePBU消息, 所述 ePBU消息中包括: N-D-MAG(MN)的 地址和 ROI , 所述 ROI用来指示建立隧道维持路由优化;
可选的, 可以设置 ROI=ll来指示建立隧道维持路由优化。
步骤 179: D-MAG(CN)向 N-D-MAG(MN)发送 ePBA消息,所述 ePBA 消息中包括 ROI, 表示建立隧道维持路由优化,
可选的, 可以设置 ROI= 11来表示建立隧道维持路由优化。
步骤 1710: N-D-MAG(MN)向 MN向发送路由公告 RA;
步骤 1711A: MN与 N-D-MAG(MN)进行数据传输; 即传递 IP packet ; 步骤 1711B: N-D-MAG(MN) 与 D-MAG(CN)通过建立的路由优化隧 道进行数据传输;
步骤 1711C: D-MAG(CN)与 CN进行数据传输。
需要说明的是,如果在 P-D-MAG上建立的隧道不再有效(如 CN移动 到另一个 D-MAG下 ), 那么需要重新进行上述路由优化的建立过程。
还请参阅图 18, 为本发明实施例提供的一种分布式移动管理中路由优 化的维持多隧道的信令流程图, 在该实施例中, 以维持 n个隧道为例, 如 图所示包括:
步骤 180A至步骤 180C: MN与 P-D-MAG(MN)进行数据 ( IP packetl ) 传输,P-D-MAG(MN) 与 D-MAG(CNl) 进行 IP packetl传输; D-M AG(CNl) 与 CN1进行 IP packetl传输;
步骤 181 A至步骤 181C: MN与 P-D-MAG(MN)进行数据 ( IP packetn ) 传输, P-D-MAG(MN) 与 D-MAG(CNn) 进行 IP packetn传输; D-MAG(CNn) 与 CNn进行 IP packetn传输;
步骤 182: MN再次移动到 N-D-MAG ( MN );; 即 MN再次 Attach或 RS到 N-D-MAG ( MN )上;
步骤 183: N-D-MAG(MN)对该 MN进行注册登记, 即 Registration; 步骤 184A: N-D-MAG(MN)向 F-D-MAG(MN)1发送 ePBUl消息, 请 求为 MN分配的地址继续使用; 其中, 在该消息中包括 MN-ID和 ROI, 可 选的, ROI=01 ; 其中, F-D-MAG(MN)1为 F-D-MAG ( prefixl )
步骤 185A: F-D-MAG(MNl) 向 N-D-MAG(MN)发送 ePBAl响应; 该 应答响应中也包括 MN-ID和 ROI;
步骤 184B: N-D-MAG(MN)向 F-D-MAG(MNn)发送 ePBUn消息, 请 求为 MN分配的地址继续使用; 其中, 在该消息中包括 MN-ID和 ROI, 可 选的, ROI=01 ; 其中, 所述 F-D-MAG(MNn)为 F-D-MAG ( prefixn );
步骤 185B: F-D-MAG(MNn)向 N-D-MAG(MN)发送 ePBAn响应; 该 应答响应中也包括 MN-ID和 ROI; 其中, 可以设置 ROI=01来表示继续使 用为 MN分配的地址;
步骤 186: N-D-MAG(MN)向 P-D-MAG(MN)发送 ePBU消息, 其中, 所述 ePBU消息包括 MN-ID和 ROI;请求在 P-D-MAG上建立的隧道信息, 所述隧道信息包括全部 CN所在的 D-MAG的地址, 以及相应的 MN-ID或 MN的地址前缀;
步骤 187: P-D-MAG(MN) 向 N-D-MAG(MN)发送 ePBA响应,所述响 应中包括全部 CN (本实施例以 CN1 ~CNn为例)所在的 D-MAG的地址 (本实 施例以 D-MAG1 ~D-MAGn为例), 以及相应的 MN-ID或 MN的地址前缀; 步骤 188A : N-D-MAG(MN)在获得之前的隧道信息之后, 向
D-MAG(CNl)发送 ePBUl消息, 所述 ePBUl消息中包括: N-D-MAG(MN) 的地址和 ROI, 所述 ROI用来指示建立隧道维持路由优化;
步骤 189A: D-MAG(CNl) 向 N-D-MAG(MN)发送 ePBAl消息, 所述 ePBAl消息中包括 ROI, 表示建立隧道维持路由优化;
步骤 188B: N-D-MAG(MN)在获得之前的隧道信息之后, 向
D-MAG(CN)n发送 ePBUn消息,所述 ePBUn消息中包括: N-D-MAG(MN) 的地址和 ROI, 所述 ROI用来指示建立隧道维持路由优化;
步骤 189B: D-MAG(CNn) 向 N-D-MAG(MN)发送 ePB An消息, 所述 ePBAn消息中包括 ROI, 表示建立隧道维持路由优化;
步骤 1810: N-D-MAG(MN)向 MN向发送路由公告 RA;
步骤 1811 A至步骤 1811C: MN与 N-D-MAG(MNl) 进行 IP packetl 传输; N-D-MAG(MN1)1与 D-MAG(CNl) 通过建立的路由优化隧道进行 IP packetl传输; D-MAG(CNl)与 CN1进行 IP packetl传输;
步骤 1812A至步骤 1812C: MN与 N-D-MAG(MNn) 进行 IP packetn 传输; N-D-MAG(MNnn与 D-MAG(CNn)通过建立的路由优化隧道进行 IP packetn传输; D-MAG(CNn)与 CNn进行 IP packetln传输。
在上述实施例中, 所述 ePBU的一种信令格式为: 在 PMIPv6的 PBU 基础上增加 2bit状态值 ROI; 具体表 1所示, 表 1为 ePBU的一种信令格 式, 但并不限于此。
表 1
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
Sequence #
A H L K IV R P ROI Reserved Lifetime
Mobility options
所述 ePBA的一种信令格式为: 在 PMIPv6的 PBA基础上增加 2bit状 态值 ROI, 具体表 2所示, 表 2为 ePBA的一种信令格式, 但并不限于此。
表 2
0 1 2 3
Mobility options
本发明实施例中, 通过建立的路由优化隧道进行数据传输, 解决了
DMM中分布式锚点架构下由于存在路由长的技术问题, 同时,也降低了延 迟和抖动; 在维持路由优化阶段, 通过一次信令交互可以获得之前建立的 全部隧道信息, 而不需要每次都去重新查询 CN所在的锚点的地址, 节省 了信令开销。
进一步, 在维持路由优化阶段, 通过一次信令交互获取之前建立的全 部隧道信息后, 可以删除旧的隧道, 也节省了信令开销。
实施例二
在实施例二中, 路由优化也分为两个步骤, 步骤一: 路由优化的发起; 步骤二: 路由优化在 MN移动过程中的维持。
步骤一:路由优化的发起同实施例一中的步骤一相同,具体详见图 16, 在此不再赘述。
步骤二: 路由优化的维持的信令流程如图 19所示。 图 19为本发明实 施例提供的另一种路由优化的维持信令的流程图; 具体包括:
步骤 191A至 191C, 与步骤 171 A至 171C同, 具体详见上述; 步骤 192至步骤 195, 与步骤 172至步骤 175同, 具体详见上述; 步骤 196: N-D-MAG(MN)向 P-D-MAG(MN)发送 ePBU消息, 请求路 由优化隧道的转移; 所述 ePBU消息包括: MN-ID和 N-D-MAG(MN)的地 址, 以及應;
可选的, 可以设置 R0I为 00, 其目的在于请求 P-D-MAG(MN)进行路 由优化隧道的转移。
步骤 197: P-D-MAG(MN)向 CN所在的 D-MAG发送 ePBU消息, 其 中, CN所在的 D-MAG称为 D-MAG(CN); 其目的在于使得 CN所在的
D-MAG知道 MN的 N-D-MAG的地址; 也就是 MN的当前的转交地址; 其中, 所述 ePBU消息包括 MN-ID和 N-D-M AG(MN)的地址, 以及 ROI。
也就是说, P-D-MAG(MN)根据在其上已经建立的隧道情况向 CN所在 的 D-MAG (即 D-MAG(CN))告知 N-D-MAG(MN)的地址, 即 MN的新转交 地址。
可选的,在步骤 197中,可以设置 ROI为 11 ,以告知 CN所在的 D-MAG 知道 MN的 N-D-MAG的地址。
步骤 198: D-MAG(CN)向所述 P-D-MAG(MN)发送 ePBA消息; 所述 ePBA消息中包括所有 CN的 D-MAG地址;
步骤 197和步骤 198这一对消息的目的在于使得 CN所在的 D-MAG 知道 MN的 N-D-MAG的地址, 也就是 MN的当前的转交地址, 以便于 N-D-M AG(MN)和 D-M AG(CN)二者之间可以建立路由优化隧道, 维持路由 优化过程。
步骤 199: P-D-MAG(MN)返回 ePBA消息给 N-D-MAG(MN),所述 ePBA 消息包括: 与该 MN通信的所有 CN的 D-MAG地址, 以及 ROI;
可选的, 可以在 ePBA 消息中的 ROI 设置为 00 , 用于告知 N-D-MAG(MN), CN当前所在的 D-MAG的地址, 使得二者之间可以建立 路由优化隧道进行数据直接传输; 从而达到了维持路由优化的目的。
步骤 1910: N-D-MAG(MN)向 MN向发送路由公告 RA;
步骤 1911A至步骤 511C, 与骤 311A至步骤 311C同, 具体详见上述。 在上述图 19所示的实施例中, 如果在 P-D-MAG(MN)有多条隧道, 那 么,可以通过步骤 196和步骤 199的一次信令交互来获取多个隧道的转移, 节省了查询的信令开销, 具体如图 20所示, 图 20为本发明实施例提供的 另一种路由优化的维持多隧道的信令流程图; 在该实施例中, 以维持 n个 隧道为例, 具体包括:
步骤 2000A至步骤 2000C, 与步骤 180A至步骤 180C同, 具体详见上 述;
步骤 2001A至步骤 2001C, 与步骤 181A至步骤 182C同, 具体详见上 述;
步骤 2002至步骤 2005B , 与步骤 182至步骤 185B同, 具体详见上述;
步骤 2006: N-D-MAG(MN)向 P-D-MAG(MN)发送 ePBU消息,请求路 由优化隧道的转移; 所述 ePBU消息包括: MN-ID和 N-D-MAG(MN)的地 址, 以及應;
可选的, 可以设置 ROI为 00, 其目的在于请求 P-D-MAG(MN)进行路 由优化隧道的转移。
其中,在该实施例中, P-D-MAG(MN)知道与该 MN通信的所有 CN 所 在所有的 D-MAG的地址, 其获取的方式同前, 在此不再赘述。
步骤 2007A: P-D-MAG(MN)向 D-MAG ( CN1 )发送 ePBUl消息, 其 中, D-MAG(CNl) 为 CN所在的 D-MAG 1 ; 其目的在于使得 CN所在的 D-MAG 1知道 MN的 N-D-MAG的地址; 也就是 MN当前的转交地址; 其 中, 所述 ePBUl消息包括 MN-ID和 N-D-MAG(MN)的地址, 以及 ROI; 可选的, 可以设置 ROI为 11 , 以告知 CN所在的 D-MAG1知道 MN 的 N-D-MAG的地址。
步骤 2008A: D-MAG(CNl)向所述 P-D-MAG(MN)发送 ePBAl消息; 所述 ePBAl消息中包括所有 CN的 D-MAG1地址;
步骤 2007B: P-D-MAG(MN)向 D-MAG ( CNn )发送 ePBUn消息, 其 中, D-MAG(CNn) n为 CN所在的 D-MAG n; 其目的在于使得 CN所在的 D-MAG n知道 MN的 N-D-MAG的地址; 也就是 MN当前的转交地址; 其 中, 所述 ePBUn消息包括 MN-ID和 N-D-M AG(MN)的地址, 以及 ROI; 可选的, 可以设置 ROI为 11 , 以告知 CN所在的 D-MAGn知道 MN 的 N-D-MAG的地址。
步骤 2008B: D-MAG(CN) n向所述 P-D-MAG(MN)发送 ePBAn消息; 所述 ePBAn消息中包括所有 CN的 D-MAGn地址;
步骤 2009: P-D-MAG(MN)返回 ePBA消息给 N-D-MAG(MN), 所述 ePBA消息包括: 与该 MN相关的所有 CN的 D-MAG地址, 以及 ROI; 其 中, 与该 MN相关的所有 CN的 D-MAG地址包括: D-MAG(CN)1的地址 至 D-MAG(CN)n 的地址。
可选的, 可以将 ePBA 消息中的 ROI 设置为 00 , 用于告知 N-D-MAG(MN), CN当前所有的 D-MAG的地址, 使得 N-D-MAG(MN)与 该 MN通信的所有 CN 所在的 D-MAG ( CN )之间均可以建立路由优化隧
道, 并直接进行数据传输; 从而达到了维持路由优化的目的。
步骤 2010: N-D-MAG(MN)向 MN向发送路由公告 RA;
步骤 2011A至步骤 2011C, 与骤 1811A至步骤 1811C同, 具体详见上 述;
步骤 2012A至步骤 2012C, 与骤 1812A至步骤 1812C同, 具体详见上 述。
实施例三
在上述实施例中, 如果通信对端节点 CN为一个固定的终端或内容月良 务器, 并且具备建立隧道的信令交互的能力, 其系统架构示意图如图 21所 示,图 21为本发明实施例提供的另一种分布式移动管理的系统架构示意图。
在该实施例中, MN由 F-D-MAG移动到 N-D-MAG, 如图中虚线所 示, N-D-MAG与 F-D-MAG进行交互, 实现分布式移动管理的路由优化, 其路由优化也分为两个步骤, 步骤一: 路由优化的发起, 其具体过程如图 22所示; 步骤二: 路由优化在 MN移动过程中的维持, 其具体过程如图 23 所示。
还请参阅图 22, 为本发明实施例提供的又一种路由优化发起的信令流 程图, 该实施例中, 初始会话在 F-D-MAG上产生, 由其分配 IPv6地址前 缀。 具体包括:
步骤 221 : MN附着 ( Attach )或路由 ( RS )到 N-D-MAG上; 步骤 222: N-D-MAG对该 MN进行注册登记, 即 Registration;
步骤 223: 当 MN移动时, N-D-MAG向 F-D-MAG发送 ePBU消息, 在该消息中包括 MN-ID和路由优化指示 ROI;以指示当前为 MN分配的地 址, 或地址前缀仍在使用, 且通知 F-D-MAG要使用路由优化模式;
可选,可以通过设置 ROI=01 ,来指示当前为 MN分配的地址或地址前 缀仍在使用, 且通知要使用路由优化模式;
步骤 224: F-D-MAG向 N-D-MAG发送 ePBA消息; 该应答响应中也 包括 MN-ID和 ROI;
步骤 225: N-D-MAG向 CN发送 ePBU消息, 告知 CN路由优化的执 行;
其中, N-D-MAG可以通过 MN的 profile查到 CN的地址, 或者通过
拦截 MN的上行分组进而得到 CN的地址;
可选的, 可以设置 ePBU消息中的 ROI= 11; 来告知 CN路由优化的执 行。
步骤 226: CN向 N-D-MAG发送 ePBA消息;, 建立双向隧道; 步骤 227: N-D-MAG向 MN向发送路由公告 RA;
步骤 228A: MN与 N-D-MAG进行数据传输; 即传递 IP packet;
步骤 228B: N-D-MAG与 CN进行数据传输, 即传递 IP packet。
也就是说, N-D-MAG可以与 CN直接利用建立的双向隧道进行路由优 化方式的数据传输。
还请参阅图 23 , 为本发明实施例提供的又一种分布式移动管理中路由 优化的维持的信令流程图, 该实施例, 当 MN再次移动时, 包括:
步骤 231A: MN与 P-D-MAG进行数据 ( IP packet )传输;
步骤 23 IB: P-D-MAG与 CN进行数据传输;
步骤 232: MN再次 Attach或 RS到 N-D-MAG上;
步骤 233: N-D-MAG对该 MN进行注册登记, 即 Registration;
步骤 234: N-D-MAG向 F-D-MAG发送 ePBU消息, 请求为 MN分配 的地址继续使用; 其中, 在该消息中包括 MN-ID和 ROI;
可选的, 在该实施例中, 可以通过设置 ROI=01 , 来表示在 F-D-MAG 上分配的该 MN的地址仍在使用。
步骤 235: F-D-MAG向 N-D-MAG发送 ePBA响应; 该应答响应中也 包括 MN-ID和 ROI, 可选的, 在该应答响应中可以将 ROI标识设为 01 , 表示继续使用为 MN分配的地址;
步骤 236: N-D-MAG向 P-D-MAG发送 ePBU消息, 所述 ePBU消息 包括 MN-ID和 ROI, 告知 P-D-MAG删除其与 MN相关的隧道, 如果在 P-D-MAG上有多个隧道, 也是通过这一次信令交互告知 P-D-MAG进行全 部删除。
可选的, 可以通过设置 ROI=00 , 来告知 P-D-MAG , 删除与 MN相关 的隧道; 也就是说, 其目的在于通过一次信令交互可以删除之前在 P-D-MAG上建立的全部隧道;
步骤 237: P-D-MAG向 N-D-MAG发送 ePBA消息, 所述 ePBA消息 包括 MN-ID和 ROI;
步骤 238: N-D-MAG向 CN发送 ePBU消息,所述消息中包括: MN-ID 和 N-D-MAG地址, 该消息的目的在于使得 CN知道 MN的 N-D-MAG的 地址, 也就是 MN当前的转交地址, 使得 N-D-MAG和 CN二者之间可以 建立路由优化隧道, 维持路由优化过程。
可选的, 可以设置该消息中的 ROI标识为 11 , 使得 CN知道 MN的 N-D-MAG的地址。 也就是说, N-D-MAG发送 ePBU ( ROI=ll )给 CN, 来执行路由优化。
步骤 239: CN向 N-D-MAG发送 ePBA响应;
步骤 2310: N-D-MAG向 MN发送 RA;
步骤 2311 A: MN与 N-D-MAG进行数据传输; 即传递 IP packet; 步骤 2311 B: N-D-MAG与 CN进行数据传输; 即传递 IP packet。 实施例四
在实施例中, 路由优化也分为两个步骤, 步骤一: 路由优化的发起; 步骤二: 路由优化在 MN移动过程中的维持。 步骤一与实施例三中的步骤 一相同, 具体详见上述;
关于步骤二中路由优化的维持, 具体详见图 24, 图 24为本发明实施 例提供又一种分布式移动管理中路由优化的维持的信令流程图;具体包括: 步骤 241 A至步骤 245 , 与 231 A至步骤 225相同, 具体详见上述; 步骤 246: N-D-MAG向 P-D-MAG发送 ePBU消息, 所述 ePBU消息 包括: MN-ID和 ROI, 请求路由优化隧道转移;
可选的, 可以设置 ROI=00来表示请求路由优化隧道转移。
步骤 247: P-D-MAG向与 MN通信的所有 CN发送 ePBU消息, 告知 全部 CN, 该 N-D-MAG与 CN维持路由优化状态, 其中, 所述消息中包括 N-D-MAG的地址和 ROI; 之后, P-D-MAG删除之前隧道的相关信息。 在 该实施例中, 一个 CN为例。
可选的, 可以设置 ROI=ll , 表示告知全部 CN, 该 N-D-MAG与 CN 维持路由优化状态;
步骤 248: 与 MN通信的所有 CN向 P-D-MAG发送 ePBA响应,所述
ePBA响应包括该 CN的地址;
也就是说, 步骤 247和步骤 248, 用于 P-D-MAG向 CN通知路由优化 隧道的转移。
步骤 249: P-D-MAG向 N-D-MAG发送 ePBA响应, 所述 ePBA响应 包括与 MN通信的所有 CN的地址,
可选的, 可以设置 ROI=00, 表示 N-D-MAG就可以与 CN通过路由优 化方式直接进行数据传输。
步骤 2410: N-D-MAG向 MN发送 RA;
步骤 2411A: MN与 N-D-MAG进行数据包的传输;
步骤 2411 B: N-D-MAG与 CN进行数据包的传输。
实施例五
在实施例五中, 路由优化也分为两个步骤, 步骤一: 路由优化的发起; 步骤二: 路由优化在 MN移动过程中的维持, 其对应的信令流程图如图 25 和图 26所示。
请参阅图 25 ,为本发明实施例提供的一种路由优化发起的信令流程图, 具体包括:
步骤 251 : MN附着 ( Attach )或路由 ( RS )请求到 N-D-MAG上; 步骤 252: N-D-MAG对该 MN进行注册登记, 即 Registration;
步骤 253: N-D-MAG向 F-D-MAG发送 ePBU消息, 告知为 MN分配 的地址继续使用, 以及路由优化的发起; 其中, 所述 ePBU 消息包括 N-D-MAG的地址和 ROI;
可选的, 可设置 ROI=01来告知 F-D-MAG, 为 MN分配的地址的继续 使用和路由优化的发起;
步骤 254: F-D-MAG向 CN发送 ePBU消息, 所述 ePBU消息中包括 MN-ID和 N-D-MAG的地址, 发送 ePBU消息的目的, 用于向 CN通知路 由优化隧道的建立。
可选的, 可以设置 ROI为 11 , 用于通知 CN路由优化隧道的建立, 即 告知 CN, N-D-MAG与 CN建立路由优化;
步骤 255: CN向 F-D-MAG发送 ePBA响应;
步骤 256: F-D-MAG向 N-D-MAG发送 ePBA响应;
步骤 257: N-D-MAG向 MN发送 RA;
步骤 258A: MN与 N-D-MAG进行数据传输; 即传递 IP packet;
步骤 258B: N-D-MAG与 CN进行数据传输; 即传递 IP packet。
由该实施例可知, 该实施例五与实施例三或实施例四的不同在于: 向 CN通告路由优化的建立和维持是通过 F-D-MAG完成的, 其中, 步骤 114 和步骤 115的 ePBU /ePBA消息包括 MN-ID和 N-D-MAG的地址,可选的, 可以将 ROI设置为 11。 这对消息用于 P-D-M AG向 CN通知路由优化隧道 的建立。
还请参阅图 26, 为本发明实施例提供的一种分布式移动管理中路由优 化的维持的信令流程图, 具体包括:
步骤 261 A: MN与 P-D-MAG进行数据 ( IP packet )传输;
步骤 261B: P-D-MAG与 CN与进行数据( IP packet )传输; 步骤 262: MN再次 Attach或 RS到 N-D-MAG上;
步骤 263: N-D-MAG对该 MN进行注册登记, 即 Registration;
步骤 264: N-D-MAG向 F-D-MAG发送 ePBU消息, 告知 F-D-MAG, 该 MN的地址的继续使用和路由优化的维持;
可选的, 可以设置 ROI=01来表示 MN的地址继续使用和路由优化的 维持;
步骤 265: F-D-MAG向 CN发送 ePBU消息, 所述 ePBU消息中包括 MN-ID和 N-D-MAG的地址, 发送 ePBU消息的目的, 用于向 CN通知路 由优化隧道的建立。
可选的, 可以设置 ROI为 11 , 用于通知 CN路由优化隧道的建立, 即 告知 CN, N-D-MAG与 CN建立路由优化;
步骤 266: CN向 F-D-MAG发送 ePBA响应;
步骤 267: F-D-MAG向 N-D-MAG发送 ePBA响应;
步骤 268: N-D-MAG向 MN发送 RA;;
步骤 269: N-D-MAG向 P-D-MAG发送 ePBU消息, 所述 ePBU消息 中包括 MN-ID和 ROI, 告知 P-D-MAG删除在 P-D-MAG上之前建立与
MN-ID相关的全部隧道;
可选的, 可以设置 ROI=00 , 指示 P-D-MAG删除, 之前在 P-D-MAG 上之前建立与 MN-ID相关的全部隧道。
步骤 2610: P-D-MAG向 N-D-MAG向发送 ePBA响应;
步骤 2611A: MN与 N-D-MAG传输 IP packet;
步骤 261 IB: N-D-MAG与 CN传输 IP packet。
由上述实施例可知, 本发明实施例解决了 DMM中分布式锚点架构下 存在的长路由问题。 降低了延迟和抖动。 特别是在维持路由优化阶段, 通 过一次信令交互可以获得之前建立的全部隧道信息, 而不需要每次都去重 新查询 CN所在的锚点的地址, 可以节省信令开销; 在维持路由优化阶段, 通过一次信令交互可以删除旧的隧道, 节省了信令开销。
需要说明的是, 在本文中, 诸如第一和第二等之类的关系术语仅仅用 来将一个实体或者操作与另一个实体或操作区分开来, 而不一定要求或者 暗示这些实体或操作之间存在任何这种实际的关系或者顺序。 而且, 术语 "包括"、 "包含" 或者其任何其他变体意在涵盖非排他性的包含, 从而使 得包括一系列要素的过程、 方法、 物品或者设备不仅包括那些要素, 而且 还包括没有明确列出的其他要素, 或者是还包括为这种过程、 方法、 物品 或者设备所固有的要素。在没有更多限制的情况下,由语句 "包括一个 ... ... " 限定的要素, 并不排除在包括所述要素的过程、 方法、 物品或者设备中还 存在另外的相同要素。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬 件, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技 术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体 现出来, 该计算机软件产品可以存储在存储介质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若干指令用以使得一台计算机设备(可以是个人计算机, 服 务器, 或者网络设备等)执行本发明各个实施例或者实施例的某些部分所 述的方法。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的 普通技术人员来说, 在不脱离本发明原理的前提下, 还可以作出若干改进
和润饰, 这些改进和润饰也应视为本发明的保护范围。
Claims
1、 一种数据传输方法, 其特征在于, 包括:
当移动节点 MN移动到当前分布式移动接入网关 N-D-M AG时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-M AG , 继续使用所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG获取与所述 MN进行通信的通信对端节点 CN当前所 在的 D-MAG的地址;
所述 N-D-MAG与所述 D-MAG地址对应的 D-MAG建立路由优化隧 道;
所述 N-D-MAG通过建立的所述路由优化隧道与所述 D-MAG进行数 据传输。
2、 根据权利要求 1所述的方法, 其特征在于, 所述 N-D-MAG通知初 始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址, 包括:
通过增强代理绑定更新消息中的路由优化指示通知初始分布式移动接 入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述 N-D-MAG获 取与所述 MN进行通信的通信对端节点 CN当前所在的 D-MAG的地址, 包括:
所述 N-D-MAG向所述 F-D-MAG发送查询 CN当前所在 D-MAG的地 址的请求, 所述请求中包括所述 MN-ID以及路由优化指示;
所述 N-D-MAG接收所述 F-D-MAG发送的包括 CN当前所在 D-MAG 的地址的响应。
4、根据权利要求 1至 3任一项所述的方法,其特征在于,所述 N-D-MAG 与 D-MAG地址对应的 D-MAG建立路由优化隧道, 包括:
所述 N-D-MAG向 D-MAG地址对应的 D-MAG发送建立路由优化隧道 请求, 所述请求中包括所述 N-D-MAG的地址以及路由优化指示;
所述 N-D-MAG接收 D-MAG发送的建立路由优化隧道响应。
5、 根据权利要求 4所述的方法, 其特征在于,
所述查询 CN 当前所在 D-MAG 的地址的请求为增强代理绑定更新 ePBU消息, 所述 ePBU消息包括 CN当前所在 D-MAG的地址的响应为增 强代理绑定应答 ePBA响应;
所述建立路由优化隧道请求为 ePBU消息, 所述建立路由优化隧道响 应为 ePBA响应。
6、 一种基于权利要求 1的数据传输方法, 其特征在于, 包括: 当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-M AG时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-MAG,继续使用 所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG获取所述 MN切换前在分布式移动接入网关 P-D-MAG 上建立的路由隧道信息; 所述隧道信息包括: 全部 CN所在的 D-MAG地 址, 以及 MN-ID或 MN的地址前缀;
所述 N-D-MAG与所述 D-MAG地址建立路由维持优化隧道; 所述 N-D-MAG通过建立的所述路由维持优化隧道与所述 D-MAG进 行数据传输。
7、 根据权利要求 6所述的方法, 其特征在于, 所述 N-D-MAG通知 MN 的初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG 为 MN分配的地址具体包括:
通过增强代理绑定更新消息中的路由优化指示通知初始分布式移动接 入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址。
8、 根据权利要求 6所述的方法, 其特征在于, 所述 N-D-MAG获取所 述 MN切换前在分布式移动接入网关 P-D-MAG上建立的路由优化隧道信 息具体包括:
所述 N-D-MAG向所述 P-D-MAG发送增强代理绑定更新 ePBU消息, 所述 ePBU消息包括: 请求与 MN通信的全部 CN所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID或 MN的地址前缀;
所述 N-D-MAG接收所述 P-D-MAG增强代理绑定应答 ePBA响应,所 述 ePB A响应包括: 所述 CN所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID或 MN的地址前缀。
9、 一种基于权利要求 1的数据传输方法, 其特征在于, 包括:
当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-M AG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移,并从所述 P-D-MAG中获取与所述 MN对应的 CN 当前所在的 N-D-MAG的地址;
所述 N-D-MAG与 CN当前所在 D-MAG地址对应的 D-MAG建立路由 维持优化隧道;
所述 MN当前所在的 N-D-MAG通过建立的所述路由维持优化隧道与 CN当前所在的 D-M AG进行数据传输。
10、 根据权利要求 9所述的方法, 其特征在于, 所述 N-D-MAG请求 所述 MN切换前的分布式移动接入网关 P-D-MAG进行路由优化隧道转移, 并从所述 P-D-MAG中获取与所述 MN通信的 CN当前所在的 N-D-MAG的 地址, 具体包括:
所述 N-D-MAG向所述 MN切换前的分布式移动接入网关 P-D-MAG 发送增强代理绑定更新 ePBU 消息, 请求路由优化隧道转移, 所述 ePBU 消息包括: MN-ID和 MN当前所在的 N-D-MAG的地址;
所述 P-D-MAG将 ePBU消息发送给一个或多个 CN所在的 N-D-MAG , 以便于一个或多个 CN所在的 N-D-MAG知道 MN所在的 N-D-MAG的地 址;
所述 P-D-MAG接收所述一个或多个 CN所在的 N-D-MAG发送的增强 代理绑定应答 ePBA响应, 所述 ePBA响应包括: 与所述 MN通信的 CN 当前所在的 N-D-MAG的地址;
所述 N-D-MAG接收到所述 P-D-MAG转发的所述 ePBA响应。
11、 一种数据传输方法, 其特征在于, 包括:
当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知所述 MN的初始分布式移动接入网关 F-D-MAG继续使用所 述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG向与所述 MN通信的 CN告知路由优化的执行, 并与 所述 CN建立路由优化的双向隧道;
所述 N-D-MAG通过建立的双向隧道与所述 CN进行数据传输。
12、 根据权利要求 11所述的方法, 其特征在于, 所述 CN为固定终端 或内容服务器, 且具备建立隧道的信令交互能力。
13、 一种基于权利要求 11的数据传输方法, 其特征在于, 包括: 当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知 MN的初始分布式移动接入网关 F-D-MAG,继续使用 所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG通知所述 MN切换前的分布式移动接入网关 P-D-MAG 删除与 MN相关的隧道;
所述 N-D-MAG将 MN-ID和 MN当前所在的 N-D-MAG地址通知与
MN通信的 CN;
所述 N-D-MAG与所述 CN建立路由维持优化隧道;
所述 N-D-MAG通过建立的所述路由维持优化隧道与所述 CN进行数 据传输。
14、 一种基于权利要求 11的数据传输方法, 其特征在于, 包括: 当所述移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所述 N-D-MAG通知初始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
所述 N-D-MAG请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移;
所述 N-D-MAG与 CN的地址对应的 CN建立路由优化隧道; 所述 N-D-MAG通过建立的所述路由优化维持隧道与 CN进行数据传 输。
15、 根据权利要求 14所述的方法, 其特征在于, 所述 N-D-MAG请求 所述 MN切换前的分布式移动接入网关 P-D-MAG进行路由优化隧道转移, 具体包括:
所述 N-D-MAG向所述 MN切换前的分布式移动接入网关 P-D-MAG 发送增强代理绑定更新 ePBU 消息, 请求路由优化隧道转移, 所述 ePBU 消息包括: MN-ID和 MN当前所在的 N-D-MAG的地址;
所述 P-D-MAG向所有与 MN通信的 CN发送 ePBU消息, 告知所述
N-D-MAG与 CN维持路由优化状态;
所述 P-D-MAG接收所述 CN发送的增强代理绑定应答 ePBA响应; 所述 N-D-MAG接收到所述 P-D-MAG发送的所述 ePBA响应。
16、 根据权利要求 14或 15所述的方法, 其特征在于, 还包括: 在所述 P-D-MAG向所有与 MN通信的 CN发送 ePBU消息后,删除之 前与 MN建立的隧道。
17、 根据权利要求 14或 15所述的方法, 其特征在于, 所述 CN为固 定终端或内容服务器, 且具备建立隧道的信令交互能力。
18、 一种数据传输方法, 其特征在于, 包括:
当移动节点 MN移动到当前分布式移动接入网关 N-D-MAG时, 所述
N-D-MAG通知所述 MN的初始分布式移动接入网关 F-D-MAG, 继续使用 所述 F-D-MAG为 MN分配的地址和发起路由优化; 以便于所述 F-D-MAG 告知与 MN通信的 CN, 所述 N-D-MAG与 CN建立路由优化隧道, 并将 MN-ID和 N-D-MAG地址告知 CN;
所述 N-D-MAG通过建立的路由优化隧道与所述 CN进行数据传输。
19、 一种基于权利要求 18的数据传输方法, 其特征在于, 包括: 当移动节点 MN移动到下一个分布式移动接入网关 N-D-MAG时, 所 述 N-D-MAG 通知初始分布式移动接入网关 F-D-MAG , 继续使用所述 F-D-MAG为 MN分配的地址和路由优化的维持; 以便于所述 F-D-MAG告 知与 MN通信的 CN, 所述 N-D-MAG与 CN维持路由优化隧道, 并将所述 N-D-MAG的地址告知所述 CN;
所述 N-D-MAG通过建立的路由优化隧道与所述 CN进行数据传输。
20、 根据权利要求 19所述的方法, 其特征在于, 还包括:
所述 N-D-MAG告知所述 MN切换前的分布式移动接入网关 P-D-MAG 删除与所述 MN之前建立的隧道。
21、 一种数据传输的装置, 其特征在于, 包括:
通知单元, 用于在检测到有移动节点 MN接入时, 通知所述 MN的初 始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址;
获取单元, 用于获取与所述 MN进行通信的通信对端节点 CN当前所 在的 D-MAG的地址;
建立单元, 用于与所述 D-MAG地址对应的 D-MAG建立路由优化隧 道;
传输单元, 用于通过建立的所述路由优化隧道与所述 D-MAG进行数 据传输。
22、 根据权利要求 21所述的装置, 其特征在于, 所述通知单元, 具体 用于通过增强代理绑定更新消息中的路由优化指示通知初始分布式移动接 入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址。
23、 根据权利要求 21所述的装置, 其特征在于, 所述获取单元包括: 第一发送单元, 用于向所述 F-D-MAG发送查询 CN当前所在 D-MAG 的地址的请求, 所述请求中包括所述 MN-ID以及路由优化指示;
第一接收单元, 用于接收所述 F-D-MAG 发送的包括 CN 当前所在 D-MAG的地址的响应。
24、 根据权利要求 21至 23任一项所述的装置, 其特征在于, 所述建 立单元包括:
第二发送单元, 用于向 D-MAG地址对应的 D-MAG发送建立路由优 化隧道请求, 所述请求中包括所述 N-D-MAG的地址以及路由优化指示; 第二接收单元, 用于接收 D-MAG发送的建立路由优化隧道响应。
25、 一种基于权利要求 21的数据传输装置, 其特征在于, 包括: 通知单元, 用于在检测到有移动节点 MN接入时, 通知 MN的初始分 布式移动接入网关 F-D-MAG,继续使用所述 F-D-MAG为 MN分配的地址; 获取单元,用于获取所述 MN切换前在分布式移动接入网关 P-D-MAG 上建立的路由隧道信息; 所述隧道信息包括: 全部 CN所在的 D-MAG地 址, 以及 MN-ID或 MN的地址前缀;
建立单元, 用于与所述 D-MAG地址建立路由维持优化隧道; 传输单元, 用于通过建立的所述路由维持优化隧道与所述 D-MAG进 行数据传输。
26、 根据权利要求 25所述的装置, 其特征在于, 所述通知单元, 具体 用于通过增强代理绑定更新消息中的路由优化指示通知初始分布式移动接
入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址。
27、 根据权利要求 25所述的装置, 其特征在于, 所述获取单元包括: 发送单元, 用于向所述 P-D-MAG发送增强代理绑定更新 ePBU消息, 所述 ePBU消息包括: 请求与 MN通信的全部 CN所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID或 MN的地址前缀;
接收单元,用于接收所述 P-D-MAG增强代理绑定应答 ePBA响应,所 述 ePB A响应包括: 所述 CN所在的 D-MAG地址, 以及与所述 CN对应的 MN-ID或 MN的地址前缀。
28、 一种基于权利要求 21的数据传输装置, 其特征在于, 包括: 通知单元, 用于在检测到有移动节点 MN接入时, 通知初始分布式移 动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址;
请求单元,用于请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移;
获取单元, 用于从所述 P-D-MAG中获取与所述 MN通信的 CN当前 所在的 N-D-M AG的地址;
建立单元,用于与 CN当前所在 D-MAG地址对应的 D-MAG建立路由 维持优化隧道;
传输单元, 用于通过建立的所述路由维持优化隧道与 CN 当前所在的 D-MAG进行数据传输。
29、 根据权利要求 28所述的装置, 其特征在于, 所述请求单元包括: 发送单元, 用于向所述 MN切换前的分布式移动接入网关 P-D-MAG 发送增强代理绑定更新 ePBU 消息, 请求路由优化隧道转移, 所述 ePBU 消息包括: MN-ID 和 MN 当前所在的 N-D-MAG 的地址; 以便于所述 P-D-MAG将 ePBU消息发送给一个或多个 CN所在的 N-D-MAG, 以使一 个或多个 CN所在的 N-D-MAG知道 MN所在的 N-D-MAG的地址;
接收单元,用于接收所述 P-D-MAG发送的所述 ePBA响应,所述 ePBA 响应为一个或多个 CN所在的 N-D-MAG发送的增强代理绑定应答 ePB A响 应, 包括: 与所述 MN通信的 CN当前所在的 N-D-MAG的地址。
30、 一种数据传输装置, 其特征在于, 包括:
通知单元, 用于在检测到有移动节点 MN接入时, 通知所述 MN的初
始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址;
建立单元, 用于向与 MN通信的 CN告知路由优化的执行, 并与所述 CN建立路由优化的双向隧道;
传输单元, 用于所述 N-D-MAG通过建立的双向隧道与所述 CN进行 数据传输。
31、 根据权利要求 30所述的装置, 其特征在于, 所述与 MN通信的 CN为固定终端或内容服务器, 且具备建立隧道的信令交互能力。
32、 一种基于权利要求 30的数据传输装置, 其特征在于, 包括: 第一通知单元, 用于检测到移动节点 MN接入时, 通知所述 MN的初 始分布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的 地址;
第二通知单元, 用于通知所述 MN 切换前的分布式移动接入网关 P-D-MAG删除与所述 MN相关的隧道;
第三通知单元,用于将 MN-ID和 MN当前所在的 N-D-MAG的地址通 知与 MN通信的 CN;
建立单元, 用于与所述 CN建立路由维持优化隧道;
传输单元, 用于通过建立的所述路由维持优化隧道与所述 CN进行数 据传输。
33、 一种基于权利要求 30的数据传输装置, 其特征在于, 包括: 通知单元, 用于检测到移动节点 MN接入时, 通知 MN的初始分布式 移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址; 请求单元,用于请求所述 MN切换前的分布式移动接入网关 P-D-MAG 进行路由优化隧道转移;
建立单元, 用于与 CN的地址对应的 CN建立路由优化隧道; 传输单元, 用于通过建立的所述路由优化维持隧道与 CN进行数据传 输。
34、 根据权利要求 33所述的装置, 其特征在于, 所述请求单元包括: 发送单元, 用于向所述 MN切换前的分布式移动接入网关 P-D-MAG
发送增强代理绑定更新 ePBU 消息, 请求路由优化隧道转移, 所述 ePBU 消息包括: MN-ID 和 MN 当前所在的 N-D-MAG 的地址; 以便于所述 P-D-MAG向所有与 MN通信的 CN发送 ePBU消息, 告知所述 N-D-MAG 与 CN维持路由优化状态;
接收单元,用于通过所述 P-D-MAG接收所述 CN发送的增强代理绑定 应答 ePBA响应。
35、 根据权利要求 33或 34所述的装置, 其特征在于, 还包括: 删除单元, 用于在所述 P-D-MAG向所有与 MN通信的 CN发送 ePBU 消息后, 删除之前与 MN建立的隧道。
36、 一种数据传输装置, 其特征在于, 包括:
通知单元, 用于检测到移动节点 MN接入时, 通知所述 MN的初始分 布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址 和发起路由优化; 以便于所述 F-D-MAG告知与 MN通信的 CN, 所述 N-D-MAG与 CN建立路由优化隧道, 并将 MN-ID和 N-D-MAG地址告知 CN;
传输单元, 用于通过所述路由优化隧道与所述 CN进行数据传输。
37、 一种基于权利要求 36的数据传输装置, 其特征在于, 包括: 通知单元, 用于检测到移动节点 MN接入时, 通知所述 MN的初始分 布式移动接入网关 F-D-MAG, 继续使用所述 F-D-MAG为 MN分配的地址 和路由优化的维持; 以便于所述 F-D-MAG告知与 MN通信的 CN , 所述数 据传输装置与 CN维持路由优化隧道, 并将所述数据传输装置的地址告知 所述 CN;
传输单元, 用于通过建立的路由优化隧道与所述 CN进行数据传输。
38、 根据权利要求 37所述的装置, 其特征在于, 还包括:
删除单元,用于通知所述 MN切换前的分布式移动接入网关 P-D-MAG 删除与所述 MN之前建立的隧道。
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EP2442596B1 (en) * | 2010-10-15 | 2014-04-02 | Alcatel Lucent | Method and apparatus for providing distributed mobility management in a network |
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CN101179457A (zh) * | 2006-11-09 | 2008-05-14 | 华为技术有限公司 | 一种基于本地移动管理域中路由优化的切换方法 |
WO2010140739A1 (ko) * | 2009-06-02 | 2010-12-09 | 경북대학교 산학협력단 | 프록시 모바일 인터넷 프로토콜 버전6 망 내 이동단말 간 통신경로 최적화 시스템 및 그 방법 |
CN101699886A (zh) * | 2009-10-20 | 2010-04-28 | 清华大学 | 多连接移动节点在代理移动IPv6中的流绑定方法 |
CN102256236A (zh) * | 2011-06-08 | 2011-11-23 | 北京交通大学 | 一种分离映射机制下的移动性管理系统及方法 |
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