CN102215541B - Mobile handover realization method for next-generation mobile ad hoc network - Google Patents
Mobile handover realization method for next-generation mobile ad hoc network Download PDFInfo
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Abstract
The invention discloses a mobile handover realization method for a next-generation mobile ad hoc network. The next-generation mobile ad hoc network consists of a plurality of sub-networks, and the sub-network consists of a plurality of mobile nodes 3. An Internet protocol version 6 (IPv6) address of the mobile node in the mobile ad hoc network consists of four parts, wherein a first part is a global routing prefix; a second part is a sub-network identifier (ID); a third part is an address type representing whether the IPv6 address of the mobile node is a home address or a care-of address; anda fourth part is a mobile node ID. The mobile node IDs uniquely identify corresponding mobile nodes in the mobile ad hoc network. When the mobile node is positioned in a home sub-network, the care-ofaddress of the mobile node is equal to the home address. The mobile handover realization method is small in data traffic, short in delayed time and low in data packet loss rate, and can be applied ina plurality of fields such as military affairs, national defense, medicine, health and the like.
Description
Technical field
The present invention relates to a kind of implementation method that moves switching, in particular a kind of mobile ad hoc network of future generation moves the implementation method of switching.
Background technology
Along with the extensive use of mobile ad hoc network and based on the ripe and development of IPv6 internet, mobile ad hoc network of future generation has become the inexorable trend of future development.Along with the continuous growth of user to mobile service demand, mobile ad hoc network of future generation only provides good mobility support, just can make it obtain application space, bigger ground.At present, typical mobility protocol (as HMIPv6, FMIPv6 and MIPv6) is applied to and also has some problems in the mobile ad hoc network of future generation among the IPv6, and main cause is as follows:
1) in the existing mobility protocol, the movable sensor node need send with receive a large amount of control informations guarantee in the moving process communicate by letter unimpeded, reduce losing of packet, and transmission control information meeting consumes lot of energy, this can reduce the life-span of sensor node significantly;
2) mobile switching delay is longer, causes that packet loses in a large number.
Therefore need set up a kind of mobile switch method of low delay at the mobile ad hoc network of future generation of resource-constrained.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is at the deficiencies in the prior art, provides a kind of mobile ad hoc network of future generation to move the implementation method of switching.
Technical scheme: the IPv6 address that the invention discloses the mobile node in the described mobile ad hoc network is made up of four parts, first is overall route prefix, the overall route prefix of the IPv6 address of all mobile nodes is all identical in mobile ad hoc network, second portion is subnet ID, the subnet ID of the IPv6 address of all mobile nodes is identical in the subnet in the subnet ID unique identification mobile ad hoc network, subnet; Third part is address style, and the IPv6 address that shows mobile node is the home address Care-of Address, and the address style of home address is 1, and the address style of Care-of Address is 0; The 4th part is mobile node ID, a mobile node in the mobile node ID unique identification mobile ad hoc network;
At the frequent mobile characteristics of mobile node, the IPv6 address format of above-mentioned mobile node effectively reduces duplicate address detection power consumption and delay, thereby reduces IPv6 address configuration power consumption, saves the IPv6 address configuration time.
Described mobile ad hoc network is made up of a plurality of subnets, and described subnet is lower floor's mobile ad hoc network of this layer mobile ad hoc network;
When mobile node was positioned at local subnet (described local subnet is the network that obtains IP address, local), its Care-of Address equaled home address.
Among the present invention, described mobile ad hoc network adopts improved wireless self-networking plan range vector Routing Protocol (Ad hoc On-Demand Distance Vector Routing as required, AODV) as Routing Protocol, the route table items of improved AODV is made up of four territories, comprise Care-of Address territory, the purpose mobile node of purpose mobile node the home address territory, next jumps mobile node territory and apart from the jumping figure territory of purpose mobile node.
Among the present invention, in the route response message of described improved AODV, comprise destination address domain, subnet territory and source IP address territory; Described destination address domain comprises that purpose moving nodes local IP address field and purpose mobile node deliver the IP address field; The subnet territory shows that the destination of the routed path of setting up still is the purpose mobile node for the purpose subnet, if be 1, show and sets up the route that arrives the purpose subnet, if be 0, show and sets up the route that arrives the purpose mobile node; The source IP address territory be the destination node of route response message or purpose subnet deliver the IP address.
Expand the correspondence that the ADOV Routing Protocol not only can record home address and the Care-of Address of mobile node, can also set up the routed path that arrives the purpose subnet, thereby increased the flexibility of Routing Protocol.
Among the present invention, when mobile node moves to another one foreign subnet (namely another subnet) different with this subnet from a subnet, if mobile node does not communicate with other mobile node, then mobile node then regularly adopts following steps to set up the route of mobile node and its local subnet:
Step 201: beginning;
Step 202: after mobile node moves to foreign subnet, obtain the new IP address of delivering, broadcast route request information then in a jumping scope, the purpose IP address field of message is the subnet ID of the local subnet of this mobile node;
Step 203: after neighbours' mobile node of mobile node is received route request information, judge whether to arrive the routed path of moving nodes local subnet, if carry out step 204, otherwise carry out step 210;
Step 204: neighbours' mobile node returns a route response message to mobile node;
Step 205: at the appointed time, mobile node judges whether to receive route response message, if carry out step 207, otherwise carry out step 206;
Step 206: mobile node is broadcasted route request information in the double bounce scope, return step 203;
Step 207: mobile node sends route response message to the nearest neighbours' mobile node Z of distance local subnet, wherein in the route table items of neighbours' mobile node Z corresponding mobile node local subnet, the mobile node that the purpose mobile node is delivered IP address field sign is another mobile node R, the purpose mobile node of route response message deliver the IP address field be mobile node deliver the IP address, purpose moving nodes local IP address field is the IP address, local of mobile node, and the source IP address territory is the IP address of mobile node R;
Step 208: route response message is carried out route according to the routed path that neighbours' mobile node Z has set up, the middle mobile node of process add the route table items that arrives mobile node, the final route response message arrives purpose mobile node R;
Step 209: after mobile node R receives route response message, add the route table items that arrives mobile node, mobile node has been set up the routed path that arrives the local subnet;
Step 210: finish.
In not having the mobile network of infrastructure, realized the permanent of moving nodes local address by aforesaid operations, the user adopts the home address of mobile node to keep communicating by letter with mobile node, need not to participate in mobile handoff procedure, the moving process of mobile node and Care-of Address change process are to user transparent.
Among the present invention, when mobile node moves to the another one foreign subnet from a subnet, if mobile node communicates with the another one mobile node, then adopt following steps to set up the route of mobile node and the mobile node of communicating by letter:
Step 301: beginning;
Step 302: after mobile node moves to foreign subnet, obtain the new IP address of delivering, broadcast route request information then in a jumping scope, the purpose IP address field of message is the subnet ID that jumps the current place of mobile node Y subnet with last one of the routed path of the mobile node of communicating by letter;
Step 303: after neighbours' mobile node of mobile node is received route request information, judge whether it has the routed path that arrives a last jumping mobile node Y place subnet, if carry out step 304, otherwise carry out step 315;
Step 304: neighbours' mobile node returns a route response message to mobile node;
Step 305: at the appointed time, mobile node judges whether to receive route response message, if carry out step 307, otherwise carry out step 306;
Step 306: mobile node is broadcasted route request information in the double bounce scope, carry out step 303;
Step 307: mobile node sends route response message to the nearest neighbours' mobile node Z of distance local subnet, wherein the mobile node of the Care-of Address of the purpose mobile node of the route table items of corresponding moving nodes local subnet sign is mobile node R among neighbours' mobile node Z, the subnet territory of route response message is 1, the purpose mobile node deliver the IP address field be mobile node deliver the IP address, purpose moving nodes local IP address field is the IP address, local of mobile node, and the source IP address territory is the IP address of mobile node Y;
Step 308: the route that route response message has been set up according to mobile node Z arrives next and jumps mobile node;
Step 309: after next jumping mobile node is received route response message, judge whether oneself is positioned at the subnet at mobile node Y place, if carry out step 311, otherwise carry out step 310;
Step 310: next is jumped mobile node and add the route table items that arrives mobile node X in route table items, checks that simultaneously routing table is transmitted to next jumping mobile node nearest apart from the purpose subnet with RREP message, carry out step 309;
Step 311: next that is positioned at mobile node Y place subnet jumped after mobile node R receives route response message, judges whether to arrive the routed path of mobile node Y, if carry out step 313, otherwise carry out step 312;
Step 312: mobile node R sets up the routed path that arrives mobile node Y in subnet, and by the path of setting up route response message is transmitted to mobile node Y, the middle mobile node of process add the route table items that arrives mobile node X, carry out step 314;
Step 313: mobile node R is transmitted to mobile node Y according to existing route with route response message, the middle mobile node of process add the route table items that arrives mobile node X;
Step 314: after mobile node Y receives route response message, upgrade the route table items that arrives mobile node X;
Step 315: finish.
When mobile node interrupts with the route of the another one mobile node of communicating by letter, thereby directly set up the route that arrives the another one mobile node by mobile node by mode of unicast the mobile cost of switching is descended significantly with postponing.
Among the present invention, after mobile node moved to an external network, the communication process of communication mobile node and mobile node was:
Step 401: beginning;
Step 402: communication mobile node broadcasting route request information, the destination address in the message load is the IP address, local of mobile node;
Step 403: after route request information arrives local, mobile node place subnet, have the mobile node that arrives the mobile node routing iinformation and return route response message to the communication mobile node;
Step 404: the communication mobile node selects up-to-date routing iinformation to set up the routed path that arrives mobile node, and realizes and the communicating by letter of mobile node by this routed path;
Step 405: finish.
Among the present invention, in the communication process of mobile node and the mobile node of communicating by letter, the communication process that mobile node moves to behind the another one external network is:
Step 501: beginning;
Step 502: the communication mobile node continues to send the follow-up data bag to mobile node, and the destination address of packet is the IP address, local of mobile node;
Step 503: packet arrives last one of mobile node according to the preceding route of setting up of communication and jumps mobile node;
Step 504: last one jumps mobile node routes a data packet to the mobile node that moves to after the foreign subnet according to the route after upgrading;
Step 505: finish.
Among the present invention, if mobile node is communicated by letter with the mobile node of communicating by letter, behind the communication range of mobile node jumping mobile node on subnet inside is moved disengaging, last one jumps mobile node then adopts the AODV Routing Protocol to set up the routed path that arrives mobile node, and be that the data of mobile node send to mobile node according to newly-established routed path with destination address, guarantee the proper communication of mobile node and the mobile node of communicating by letter.
Beneficial effect: the invention provides a kind of mobile ad hoc network of future generation and move the implementation method of switching, mobile node in the described mobile ad hoc network is by mobile switching method provided by the present invention, can keep communication continuity in the moving process, effectively reduce mobile switching delay, reduced the data-bag lost rate in the mobile handoff procedure, the present invention can be applicable to numerous areas such as military and national defense, medical treatment ﹠ health, for example, in the military and national defense field, command centre obtains relevant information and data by the mobile node in the mobile ad hoc network of visit combat area.Because mobile ad hoc network has characteristics such as being easy to arrange, being easy to maintenances, and the Internet have the geographical position cover extensive, easy to use, characteristics such as friendly interface, expense are cheap, therefore, present technique has very high promotional value.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done further to specify, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is subnet of the present invention and mobile node structural representation.
Fig. 2 is the structural representation of the IPv6 address of mobile node of the present invention.
Fig. 3 is route table items structural representation of the present invention.
Fig. 4 is the route response message structure schematic diagram of improved AODV of the present invention.
Fig. 5 sets up schematic flow sheet for the route of mobile node of the present invention and its local subnet.
Fig. 6 sets up schematic flow sheet for mobile node of the present invention with the route of the mobile node of communicating by letter.
Fig. 7 is the communication process schematic diagram of communication mobile node of the present invention and mobile node.
Fig. 8 is the communication process schematic diagram after mobile node of the present invention moves to the another one external network.
Embodiment:
The invention provides a kind of mobile ad hoc network of future generation and move the implementation method of switching, mobile node in the described mobile ad hoc network is by mobile switching method provided by the present invention, can keep communication continuity in the moving process, effectively reduce mobile switching delay, reduced the data-bag lost rate in the mobile handoff procedure.
Fig. 1 is subnet of the present invention and mobile node structural representation.Described mobile ad hoc network of future generation 1 is made up of a plurality of subnets 2, and subnet 2 is made up of a plurality of mobile nodes 3.
Fig. 2 is the structural representation of the IPv6 address of mobile node of the present invention.The IPv6 address of the mobile node in the described mobile ad hoc network is made up of four parts, first is overall route prefix, its length is 64 bits, the overall route prefix of the IPv6 address of all mobile nodes is all identical in mobile ad hoc network, second portion is subnet ID, its length is the i bit, a subnet in the subnet ID unique identification mobile ad hoc network, the subnet ID of the IPv6 address of all mobile nodes is identical in subnet, wherein, the i value is determined by the number that comprises subnet in the practical application; Third part is address style, and the IPv6 address that shows mobile node is the home address Care-of Address, and the address style of home address is 1, and the address style of Care-of Address is 0; The 4th part is mobile node ID, a mobile node in the mobile node ID unique identification mobile ad hoc network.When mobile node was positioned at local subnet (described local subnet is the network that obtains IP address, local), its Care-of Address equaled home address.
Fig. 3 is route table items structural representation of the present invention.The route table items of improved AODV is made up of four territories, comprise Care-of Address territory, the purpose mobile node of purpose mobile node the home address territory, next jumps mobile node territory and apart from the jumping figure territory of purpose mobile node.
Fig. 4 is the route response message structure schematic diagram of improved AODV of the present invention.In the route response message of described improved AODV, comprise destination address domain, subnet territory and source IP address territory; Described destination address domain comprises that purpose moving nodes local IP address field and purpose mobile node deliver the IP address field; The subnet territory shows that the destination of the routed path of setting up still is the purpose mobile node for the purpose subnet, if be 1, show and sets up the route that arrives the purpose subnet, if be 0, show and sets up the route that arrives the purpose mobile node; The source IP address territory be the destination node of route response message or purpose subnet deliver the IP address.
Fig. 5 sets up schematic flow sheet for the route of mobile node of the present invention and its local subnet.When mobile node moves to another one foreign subnet (namely another subnet) different with this subnet from a subnet, if mobile node does not communicate with other mobile node, then mobile node then regularly adopts following steps to set up the route of mobile node and its local subnet:
Step 201: beginning;
Step 202: after mobile node moves to foreign subnet, obtain the new IP address of delivering, broadcast route request information then in a jumping scope, the purpose IP address field of message is the subnet ID of the local subnet of this mobile node;
Step 203: after neighbours' mobile node of mobile node is received route request information, judge whether to arrive the routed path of moving nodes local subnet, if carry out step 204, otherwise carry out step 210;
Step 204: neighbours' mobile node returns a route response message to mobile node;
Step 205: at the appointed time, mobile node judges whether to receive route response message, if carry out step 207, otherwise carry out step 206;
Step 206: mobile node is broadcasted route request information in the double bounce scope, return step 203;
Step 207: mobile node sends route response message to the nearest neighbours' mobile node Z of distance local subnet, wherein in the route table items of neighbours' mobile node Z corresponding mobile node local subnet, the mobile node that the purpose mobile node is delivered IP address field sign is another mobile node R, the purpose mobile node of route response message deliver the IP address field be mobile node deliver the IP address, purpose moving nodes local IP address field is the IP address, local of mobile node, and the source IP address territory is the IP address of mobile node R;
Step 208: route response message is carried out route according to the routed path that neighbours' mobile node Z has set up, the middle mobile node of process add the route table items that arrives mobile node, the final route response message arrives purpose mobile node R;
Step 209: after mobile node R receives route response message, add the route table items that arrives mobile node, mobile node has been set up the routed path that arrives the local subnet;
Step 210: finish.
Fig. 6 sets up schematic flow sheet for mobile node of the present invention with the route of the mobile node of communicating by letter.When mobile node moves to the another one foreign subnet from a subnet, if mobile node communicates with the another one mobile node, then adopt following steps to set up the route of mobile node and the mobile node of communicating by letter:
Step 301: beginning;
Step 302: after mobile node moves to foreign subnet, obtain the new IP address of delivering, broadcast route request information then in a jumping scope, the purpose IP address field of message is the subnet ID that jumps the current place of mobile node Y subnet with last one of the routed path of the mobile node of communicating by letter;
Step 303: after neighbours' mobile node of mobile node is received route request information, judge whether it has the routed path that arrives a last jumping mobile node Y place subnet, if carry out step 304, otherwise carry out step 315;
Step 304: neighbours' mobile node returns a route response message to mobile node;
Step 305: at the appointed time, mobile node judges whether to receive route response message, if carry out step 307, otherwise carry out step 306;
Step 306: mobile node is broadcasted route request information in the double bounce scope, carry out step 303;
Step 307: mobile node sends route response message to the nearest neighbours' mobile node Z of distance local subnet, wherein the mobile node of the Care-of Address of the purpose mobile node of the route table items of corresponding moving nodes local subnet sign is mobile node R among neighbours' mobile node Z, the subnet territory of route response message is 1, the purpose mobile node deliver the IP address field be mobile node deliver the IP address, purpose moving nodes local IP address field is the IP address, local of mobile node, and the source IP address territory is the IP address of mobile node Y;
Step 308: the route that route response message has been set up according to mobile node Z arrives next and jumps mobile node;
Step 309: after next jumping mobile node is received route response message, judge whether oneself is positioned at the subnet at mobile node Y place, if carry out step 311, otherwise carry out step 310;
Step 310: next is jumped mobile node and add the route table items that arrives mobile node X in route table items, checks that simultaneously routing table is transmitted to next jumping mobile node nearest apart from the purpose subnet with RREP message, carry out step 309;
Step 311: next that is positioned at mobile node Y place subnet jumped after mobile node R receives route response message, judges whether to arrive the routed path of mobile node Y, if carry out step 313, otherwise carry out step 312;
Step 312: mobile node R sets up the routed path that arrives mobile node Y in subnet, and by the path of setting up route response message is transmitted to mobile node Y, the middle mobile node of process add the route table items that arrives mobile node X, carry out step 314;
Step 313: mobile node R is transmitted to mobile node Y according to existing route with route response message, the middle mobile node of process add the route table items that arrives mobile node X;
Step 314: after mobile node Y receives route response message, upgrade the route table items that arrives mobile node X;
Step 315: finish.
Fig. 7 is the communication process schematic flow sheet of communication mobile node of the present invention and mobile node.After mobile node moved to an external network, the communication process of communication mobile node and mobile node was:
Step 401: beginning;
Step 402: communication mobile node broadcasting route request information, the destination address in the message load is the IP address, local of mobile node;
Step 403: after route request information arrives local, mobile node place subnet, have the mobile node that arrives the mobile node routing iinformation and return route response message to the communication mobile node;
Step 404: the communication mobile node selects up-to-date routing iinformation to set up the routed path that arrives mobile node, and realizes and the communicating by letter of mobile node by this routed path;
Step 405: finish.
Fig. 8 is the communication process schematic diagram after mobile node of the present invention moves to the another one external network.In the communication process of mobile node and the mobile node of communicating by letter, the communication process that mobile node moves to behind the another one external network is:
Step 501: beginning;
Step 502: the communication mobile node continues to send the follow-up data bag to mobile node, and the destination address of packet is the IP address, local of mobile node;
Step 503: packet arrives last one of mobile node according to the preceding route of setting up of communication and jumps mobile node;
Step 504: last one jumps mobile node routes a data packet to the mobile node that moves to after the foreign subnet according to the route after upgrading;
Step 505: finish.
In sum, the invention provides a kind of mobile ad hoc network of future generation and move the implementation method of switching, the method effectively reduces mobile switching delay, reduced the data-bag lost rate in the mobile handoff procedure, this technology can be applied to numerous areas such as military and national defense, medical treatment ﹠ health, for example, in the military and national defense field, command centre obtains relevant information and data by the mobile node in the mobile ad hoc network of visit combat area.Because mobile ad hoc network has characteristics such as being easy to arrange, being easy to maintenances, and the Internet have the geographical position cover extensive, easy to use, characteristics such as friendly interface, expense are cheap, therefore, present technique has very high promotional value.
The invention provides the thinking that mobile ad hoc network of future generation moves the implementation method of switching; method and the approach of this technical scheme of specific implementation are a lot; the above only is preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.In the present embodiment not clear and definite each component part all available prior art realized.
Claims (6)
1. a mobile ad hoc network of future generation moves the implementation method of switching, it is characterized in that, the IPv6 address of the mobile node in the described mobile ad hoc network is made up of four parts, first is overall route prefix, the overall route prefix of the IPv6 address of all mobile nodes is all identical in mobile ad hoc network, second portion is subnet ID, and the subnet ID of the IPv6 address of all mobile nodes is identical in the subnet in the subnet ID unique identification mobile ad hoc network, subnet; Third part is address style, and the IPv6 address that shows mobile node is the home address Care-of Address, and the address style of home address is 1, and the address style of Care-of Address is 0; The 4th part is mobile node ID, a mobile node in the mobile node ID unique identification mobile ad hoc network;
Described mobile ad hoc network is made up of a plurality of subnets, and described subnet is lower floor's mobile ad hoc network of this layer mobile ad hoc network;
When mobile node was positioned at the local subnet, its Care-of Address equaled home address;
Described mobile ad hoc network adopt improved wireless self-networking as required plan range vector Routing Protocol as Routing Protocol, the route table items of improved AODV is made up of four territories, comprise Care-of Address territory, the purpose mobile node of purpose mobile node the home address territory, next jumps mobile node territory and apart from the jumping figure territory of purpose mobile node;
In the route response message of described improved AODV, comprise destination address domain, subnet territory and source IP address territory; Described destination address domain comprises that purpose moving nodes local IP address field and purpose mobile node deliver the IP address field; The subnet territory shows that the destination of the routed path of setting up still is the purpose mobile node for the purpose subnet, if be 1, show and sets up the route that arrives the purpose subnet, if be 0, show and sets up the route that arrives the purpose mobile node; The source IP address territory be the destination node of route response message or purpose subnet deliver the IP address.
2. mobile ad hoc network of future generation according to claim 1 moves the implementation method of switching, it is characterized in that, when mobile node moves to the another one foreign subnet from a subnet, if mobile node does not communicate with other mobile node, then mobile node then regularly adopts following steps to set up the route of mobile node and its local subnet:
Step 201: beginning;
Step 202: after mobile node moves to foreign subnet, obtain the new IP address of delivering, broadcast route request information then in a jumping scope, the purpose IP address field of message is the subnet ID of the local subnet of this mobile node;
Step 203: after neighbours' mobile node of mobile node is received route request information, judge whether to arrive the routed path of moving nodes local subnet, if carry out step 204, otherwise carry out step 210;
Step 204: neighbours' mobile node returns a route response message to mobile node;
Step 205: at the appointed time, mobile node judges whether to receive route response message, if carry out step 207, otherwise carry out step 206;
Step 206: mobile node is broadcasted route request information in the double bounce scope, return step 203;
Step 207: mobile node sends route response message to the nearest neighbours' mobile node Z of distance local subnet, wherein in the route table items of neighbours' mobile node Z corresponding mobile node local subnet, the mobile node that the purpose mobile node is delivered IP address field sign is another mobile node R, the purpose mobile node of route response message deliver the IP address field be mobile node deliver the IP address, purpose moving nodes local IP address field is the IP address, local of mobile node, and the source IP address territory is the IP address of mobile node R;
Step 208: route response message is carried out route according to the routed path that neighbours' mobile node Z has set up, the middle mobile node of process add the route table items that arrives mobile node, the final route response message arrives purpose mobile node R;
Step 209: after mobile node R receives route response message, add the route table items that arrives mobile node, mobile node has been set up the routed path that arrives the local subnet;
Step 210: finish.
3. mobile ad hoc network of future generation according to claim 1 moves the implementation method of switching, it is characterized in that, when mobile node moves to the another one foreign subnet from a subnet, if mobile node communicates with the another one mobile node, then adopt following steps to set up the route of mobile node and the mobile node of communicating by letter:
Step 301: beginning;
Step 302: after mobile node moves to foreign subnet, obtain the new IP address of delivering, in a jumping scope, broadcast route request information then, the purpose IP address field of message is last one to jump the subnet ID of the current place of mobile node Y subnet, and mobile node Y is that mobile node arrives the last hop node on the routed path of communication mobile node;
Step 303: after neighbours' mobile node of mobile node is received route request information, judge whether it has the routed path that arrives a last jumping mobile node Y place subnet, if carry out step 304, otherwise carry out step 315;
Step 304: neighbours' mobile node returns a route response message to mobile node;
Step 305: at the appointed time, mobile node judges whether to receive route response message, if carry out step 307, otherwise carry out step 306;
Step 306: mobile node is broadcasted route request information in the double bounce scope, carry out step 303;
Step 307: mobile node sends route response message to the nearest neighbours' mobile node Z of distance local subnet, wherein the mobile node of the Care-of Address of the purpose mobile node of the route table items of corresponding moving nodes local subnet sign is mobile node R among neighbours' mobile node Z, the subnet territory of route response message is 1, the purpose mobile node deliver the IP address field be mobile node deliver the IP address, purpose moving nodes local IP address field is the IP address, local of mobile node, and the source IP address territory is the IP address of mobile node Y;
Step 308: the route that route response message has been set up according to mobile node Z arrives next and jumps mobile node;
Step 309: after next jumping mobile node is received route response message, judge whether oneself is positioned at the subnet at mobile node Y place, if carry out step 311, otherwise carry out step 310;
Step 310: next is jumped mobile node and add the route table items that arrives mobile node X in route table items, checks that simultaneously routing table is transmitted to next jumping mobile node nearest apart from the purpose subnet with RREP message, carry out step 309;
Step 311: next that is positioned at mobile node Y place subnet jumped after mobile node R receives route response message, judges whether to arrive the routed path of mobile node Y, if carry out step 313, otherwise carry out step 312;
Step 312: mobile node R sets up the routed path that arrives mobile node Y in subnet, and by the path of setting up route response message is transmitted to mobile node Y, the middle mobile node of process add the route table items that arrives mobile node X, carry out step 314;
Step 313: mobile node R is transmitted to mobile node Y according to existing route with route response message, the middle mobile node of process add the route table items that arrives mobile node X;
Step 314: after mobile node Y receives route response message, upgrade the route table items that arrives mobile node X;
Step 315: finish.
4. mobile ad hoc network of future generation according to claim 2 moves the implementation method of switching, it is characterized in that, after mobile node moved to an external network, the communication process of communication mobile node and mobile node was:
Step 401: beginning;
Step 402: communication mobile node broadcasting route request information, the destination address in the message load is the IP address, local of mobile node;
Step 403: after route request information arrives local, mobile node place subnet, have the mobile node that arrives the mobile node routing iinformation and return route response message to the communication mobile node;
Step 404: the communication mobile node selects up-to-date routing iinformation to set up the routed path that arrives mobile node, and realizes and the communicating by letter of mobile node by this routed path;
Step 405: finish.
5. mobile ad hoc network of future generation according to claim 3 moves the implementation method of switching, it is characterized in that, in the communication process of mobile node and the mobile node of communicating by letter, the communication process that mobile node moves to behind the another one external network is:
Step 501: beginning;
Step 502: the communication mobile node continues to send the follow-up data bag to mobile node, and the destination address of packet is the IP address, local of mobile node;
Step 503: packet arrives last one of mobile node according to the preceding route of setting up of communication and jumps mobile node;
Step 504: last one jumps mobile node routes a data packet to the mobile node that moves to after the foreign subnet according to the route after upgrading;
Step 505: finish.
6. mobile ad hoc network of future generation according to claim 1 moves the implementation method of switching, it is characterized in that, if mobile node is communicated by letter with the mobile node of communicating by letter, behind the communication range of mobile node jumping mobile node on subnet inside is moved disengaging, last one jumps mobile node then adopts the AODV Routing Protocol to set up the routed path that arrives mobile node, and be that the data of mobile node send to mobile node according to newly-established routed path with destination address, guarantee the proper communication of mobile node and the mobile node of communicating by letter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110150014 CN102215541B (en) | 2011-06-07 | 2011-06-07 | Mobile handover realization method for next-generation mobile ad hoc network |
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